阅读说明：本技术 制冷设备以及用于制冷设备的方法 (Refrigeration device and method for a refrigeration device ) 是由 朱啟武 朱卫忠 刘翔宇 王宝阳 孙俭俊 于 2019-11-25 设计创作，主要内容包括：本发明实施例关于一种制冷设备以及用于制冷设备的方法。制冷设备的方法包括：运行启动制冷模式,启动制冷模式包括：在第一储藏室和第二储藏室都有制冷请求时,在第一阶段运行压缩机分别冷却第一储藏室和第二储藏室,而在第二阶段运行压缩机同时冷却第一储藏室和第二储藏室。以此,在启动制冷模式下可以可靠且快速地冷却第一储藏室和第二储藏室。(Embodiments of the present invention relate to a refrigeration apparatus and a method for a refrigeration apparatus. The method of the refrigeration equipment comprises the following steps: the operation starts the refrigeration mode, starts the refrigeration mode and includes: when the first storage chamber and the second storage chamber have a cooling request, the compressor is operated in a first stage to cool the first storage chamber and the second storage chamber, respectively, and the compressor is operated in a second stage to cool the first storage chamber and the second storage chamber simultaneously. Thereby, the first storage chamber and the second storage chamber can be reliably and rapidly cooled in the start cooling mode.)

1. A method for a refrigerating apparatus (100) comprising N (N ≧ 2) storage compartments (1, 2), characterized in that the method comprises operating a start-up refrigerating mode comprising: when the N storage chambers all have refrigeration requests, the compressor (4, 4a, 4b) is operated in the first stage to cool not more than M storage chambers (1 ≦ M < N) of the N storage chambers at the same time, and the compressor is operated in the second stage to cool the N storage chambers at the same time.

2. The method as claimed in claim 1, wherein in the first stage, a compressor is operated to sequentially or alternately cool the N storage compartments.

3. Method according to claim 1, wherein operating the compressor to cool not more than M of said N storage compartments at the same time comprises supplying refrigerant to not more than M refrigeration lines (31, 31a, 31b, 32, 32a, 32b) connected in parallel at the inlet end, wherein each of said refrigeration lines is connected to a respective evaporator (81, 81a, 81b, 82, 82a, 82 b).

4. A method for a refrigerating apparatus comprising N (N ≧ 2) storage compartments (1, 2), characterized in that the method comprises operating a start-up refrigerating mode comprising: when the N storerooms (1, 2) all have refrigeration requests, the compressors (4, 4a, 4b) are operated in the first stage to stagger and respectively cool the L storerooms (L is more than or equal to 1 and less than or equal to N), and in the second stage, the compressors are operated to simultaneously cool the N storerooms.

5. Method according to any of the preceding claims, wherein cooling the N storage compartments simultaneously comprises supplying refrigerant to N refrigeration lines (31, 31a, 31b, 32, 32a, 32b) connected in parallel at their inlet ends, the outlet end of each refrigeration line being connected to a respective evaporator (81, 81a, 81b, 82, 82a, 82b) so that each evaporator is supplied with refrigerant.

6. The method of claim 4 or 5, wherein the first stage comprises operating a compressor to separately cool each of the L storage compartments.

7. A method according to claim 4 or 5 or 6, wherein the first stage comprises operating a compressor to sequentially cool the L storage compartments.

8. The method as claimed in claim 4, 5 or 6, wherein the first stage includes a compressor operation to alternately cool the L storage compartments.

9. The method according to any of the preceding claims, characterized in that the N storage compartments comprise a first storage compartment (1) and a second storage compartment (2), and in that in the first phase the cooling of the first storage compartment is switched to the cooling of the second storage compartment until the time for cooling the first storage compartment reaches a predetermined time or the temperature of the first storage compartment reaches a preset value.

10. Method according to any of the preceding claims, wherein the first phase comprises a first sub-phase in which the refrigerant output from the compressor is fed only to a first refrigeration line (31, 31a, 31b) and a second sub-phase in which the refrigerant output from the compressor is fed only to a second refrigeration line (32, 32a, 32b), wherein the inlet ends of the first and second refrigeration lines are connected in parallel, wherein the refrigerant output from the compressor is fed via the first refrigeration line to a first evaporator (81, 81a, 81b) and wherein the refrigerant output from the compressor is fed via the second refrigeration line to a second evaporator (82, 82a, 82b), wherein the first evaporator is used to cool a first storage compartment of the N storage compartments and the second evaporator is used to cool a second storage compartment of the N storage compartments.

11. The method as set forth in claim 10, wherein said first stage includes a third sub-stage of delivering refrigerant from refrigerant output from the compressor to only a third refrigeration line, wherein refrigerant output from the compressor is supplied to a third evaporator via the third refrigeration line, the third evaporator being used to cool a third storage chamber of said N storage chambers, an inlet end of said third refrigeration line being connected in parallel with an inlet end of said first refrigeration line and an inlet end of said second refrigeration line.

12. The method as claimed in any one of claims 1 to 5, wherein the first stage comprises a first sub-stage in which the refrigerant output from the compressor is delivered to only the first refrigeration line and a second sub-stage in which the refrigerant output from the compressor is delivered to the second refrigeration line and the third refrigeration line simultaneously, wherein the inlet ends of the first refrigeration line, the second refrigeration line and the third refrigeration line are connected in parallel, the refrigerant output from the compressor is supplied to the first evaporator via the first refrigeration line, the refrigerant output from the compressor is supplied to the second evaporator via the second refrigeration line, and the refrigerant output from the compressor is supplied to the third evaporator via the third refrigeration line; wherein the first evaporator is used for cooling a first storage chamber of the N storage chambers, the second evaporator is used for cooling a second storage chamber of the N storage chambers, and the third evaporator is used for cooling a third storage chamber of the N storage chambers.

13. A method for a refrigeration appliance, the method comprising:

operating a start-up cooling mode, the start-up cooling mode comprising:

when the first storage chamber (1) and the second storage chamber (2) both have refrigeration requests, the compressors (4, 4a, 4b) are operated in a first stage to stagger and respectively cool the first storage chamber and the second storage chamber; and operating the compressor in a second stage while cooling the first storage chamber and the second storage chamber.

14. The method of claim 14, wherein operating the compressor to stagger the cooling of the first storage compartment and the second storage compartment, respectively, comprises sequentially cooling the first storage compartment and the second storage compartment, or wherein operating the compressor to stagger the cooling of the first storage compartment and the second storage compartment, respectively, comprises alternately cooling the first storage compartment and the second storage compartment.

15. The method of claim 13 or 14, wherein, in the first stage, the fluid control unit opens a corresponding one of the first and second refrigeration lines connected in parallel at the inlet end to cool the corresponding storage chamber, and in the second stage, the fluid control unit opens the first and second refrigeration lines to cool the first and second storage chambers simultaneously.

16. The method of any preceding claim, wherein the start-up cooling mode is exited when each storage compartment reaches a respective stop temperature.

17. A method for a refrigeration device comprising N (N ≧ 2) refrigeration lines (31, 31a, 31b, 32, 32a, 32b) connected in parallel at their inlet ends and at their outlet ends to respective evaporators (81, 81a, 81b, 82, 82a, 82b), and a fluid control unit (7, 7a, 7b) for selectively opening or closing the refrigeration lines, characterized in that the method comprises operating a start-up refrigeration mode comprising: in a first phase, the compressor (4, 4a, 4b) is operated and the fluid control unit opens not more than M of the N refrigeration circuits (1 ≦ M < N) at the same time, and in a second phase, the compressor is operated and the fluid control unit opens the N refrigeration circuits at the same time.

18. The method as set forth in claim 17, wherein said first stage includes operating a compressor to separately turn on each of said N refrigeration circuits.

19. A method for a refrigeration device comprising N (N ≧ 2) refrigeration lines connected in parallel at their inlet ends and at their outlet ends to respective evaporators, and a fluid control unit (7, 7a, 7b) for selectively opening or closing the N refrigeration lines (31, 31a, 31b, 32, 32a, 32b), characterized in that the method comprises operating a start-up refrigeration mode comprising: in a first phase, the compressors (4, 4a, 4b) are operated and the refrigeration lines (1. ltoreq. L.ltoreq.N) of the N refrigeration lines which are not higher than L (1. ltoreq. L.ltoreq.N) are opened in a staggered manner, and in a second phase, the compressors are operated and the N refrigeration lines can all be opened.

20. The method as set forth in claim 19, wherein said first stage includes operating a compressor to deliver refrigerant to said L storage compartments in sequence.

21. The method as set forth in claim 19, wherein said first stage includes compressor operation to alternately open said L refrigeration circuits.

22. The method as set forth in claim 19, wherein said first stage includes operating a compressor to deliver refrigerant to said N storage compartments sequentially or alternately.

23. A method for a refrigeration device comprising a first refrigeration circuit (31, 31a, 31b), a second refrigeration circuit (32, 32a, 32b), the inlet end of which is connected in parallel with the inlet end of the second refrigeration circuit, the outlet end of which is connected to a first evaporator (81, 81a, 81b), the outlet end of which is connected to a second evaporator (82, 82a, 82b), and a fluid control unit (7, 7a, 7b) for selectively opening the first refrigeration circuit and/or the second refrigeration circuit, characterized in that it comprises:

operating a start-up cooling mode, the start-up cooling mode comprising:

operating the compressor (4, 4a, 4 b);

in a first phase, the fluid control unit opens the first refrigeration line and the first refrigeration line, respectively, in a staggered manner to supply refrigerant to the corresponding evaporator; and

in the second stage, the fluid control unit may open both the first and second refrigeration lines to supply the refrigerant to the first and second evaporators, respectively.

24. The method as set forth in claim 23, wherein during said first phase, refrigerant is supplied to said first and second refrigeration circuits sequentially or alternately.

25. Method according to any of the preceding claims, characterised in that the output of the compressor in the second stage is higher than the output of the compressor in the first stage.

26. Method according to any of the preceding claims, characterised in that the average speed of the compressor in the second stage is higher than the average speed of the compressor in the first stage.

27. A method according to any one of the preceding claims, characterised in that the speed of the compressor is kept constant from the first stage into the second stage.

28. A method as claimed in any one of the preceding claims, wherein in the start-up cooling mode the speed of the compressor is increased in steps.

29. Method according to any of the preceding claims, characterized in that in the start-up cooling mode the speed of the compressor is increased stepwise in dependence of the compressor run time and/or the speed of the compressor is determined in connection with the status of a fluid control unit.

30. A refrigeration device adapted to perform the method of any preceding claim.

[ technical field ]

The embodiment of the invention relates to a refrigeration device and a method for the refrigeration device.

[ background art ]

When the refrigeration appliance is just powered on, there is a refrigeration request for all storage compartments, and it is desirable that the refrigeration appliance can be cooled quickly.

[ summary of the invention ]

It is an object of embodiments of the present invention to provide a method for a refrigeration device and a refrigeration device.

It is a further object of embodiments of the present invention to provide a method for a refrigeration appliance and a refrigeration appliance having a reliable and fast start-up refrigeration mode.

Accordingly, one aspect of an embodiment of the present invention is directed to a method of a refrigeration apparatus including N (N ≧ 2) storage compartments, characterized in that the method includes operating a start-up refrigeration mode including: when the N storage chambers all have refrigeration requests, the compressor is operated in the first stage to cool the storage chambers which are not higher than M in the N storage chambers in the same time (1 is not less than M and less than N), and the compressor is operated in the second stage to cool the N storage chambers simultaneously.

In a possible embodiment, in the first stage, the compressor is operated to cool the N storage compartments sequentially or alternately.

In a possible embodiment, operating the compressor to cool not more than M of said N storage compartments at the same time comprises supplying refrigerant to not more than M refrigeration lines connected in parallel at the inlet end, wherein each of said refrigeration lines is connected to a respective evaporator.

Another aspect of an embodiment of the present invention relates to a method for a refrigeration appliance comprising N (N ≧ 2) storage compartments, characterized in that the method includes operating a start-up refrigeration mode comprising: when the N storerooms all have refrigeration requests, the compressor is operated in the first stage to cool the L storerooms (L is more than or equal to 1 and less than or equal to N) in a staggered mode, and the compressor is operated in the second stage to cool the N storerooms simultaneously.

In a possible embodiment, cooling the N storage compartments simultaneously comprises supplying refrigerant to N refrigeration lines connected in parallel at their inlet ends, the outlet end of each of the refrigeration lines being connected to a respective evaporator such that each evaporator is supplied with refrigerant.

In a possible embodiment, the first stage comprises operating a compressor to stagger cooling of each of the L storage compartments individually.

In a possible embodiment, the first stage includes operating a compressor to sequentially cool the L storage compartments.

In a possible embodiment, the first stage comprises a compressor operation to alternately cool the L storage compartments.

In a possible embodiment, the N storage compartments include a first storage compartment and a second storage compartment, and in the first stage, the second storage compartment is switched to be cooled when a time for cooling the first storage compartment reaches a predetermined time or a temperature of the first storage compartment reaches a preset value.

In a possible embodiment, the first stage comprises a first sub-stage in which the refrigerant output from the compressor is delivered only to the first refrigeration line and a second sub-stage in which the refrigerant output from the compressor is delivered only to the second refrigeration line, wherein the inlet ends of the first and second refrigeration lines are connected in parallel, the refrigerant output from the compressor being supplied to the first evaporator via the first refrigeration line and the refrigerant output from the compressor being supplied to the second evaporator via the second refrigeration line, wherein the first evaporator is configured to cool a first storage chamber of the N storage chambers and the second evaporator is configured to cool a second storage chamber of the N storage chambers.

In a possible embodiment, the first stage comprises a third sub-stage of delivering refrigerant from the refrigerant output from the compressor to only the third refrigeration line, wherein the refrigerant output from the compressor is supplied via the third refrigeration line to a third evaporator for cooling a third storage chamber of the N storage chambers, the inlet end of the third refrigeration line being connected in parallel with the inlet end of the first refrigeration line and the inlet end of the second refrigeration line.

In a possible embodiment, the first stage comprises a first sub-stage in which the refrigerant output from the compressor is delivered to only the first refrigeration line and a second sub-stage in which the refrigerant output from the compressor is delivered to the second refrigeration line and the third refrigeration line simultaneously, wherein the inlet ends of the first refrigeration line, the second refrigeration line and the third refrigeration line are connected in parallel, the refrigerant output from the compressor is supplied to the first evaporator via the first refrigeration line, the refrigerant output from the compressor is supplied to the second evaporator via the second refrigeration line, and the refrigerant output from the compressor is supplied to the third evaporator via the third refrigeration line; wherein the first evaporator is used for cooling a first storage chamber of the N storage chambers, the second evaporator is used for cooling a second storage chamber of the N storage chambers, and the third evaporator is used for cooling a third storage chamber of the N storage chambers.

Yet another aspect of an embodiment of the present invention relates to a method for a refrigeration apparatus, the method comprising: operating a start-up cooling mode, the start-up cooling mode comprising: when the first storage chamber and the second storage chamber have a cooling request, the compressor is operated in a first stage to alternately cool the first storage chamber and the second storage chamber, respectively, and in a second stage to simultaneously cool the first storage chamber and the second storage chamber.

In a possible embodiment, operating the compressor to cool the first storage chamber and the second storage chamber, respectively, includes sequentially cooling the first storage chamber and the second storage chamber, or, operating the compressor to cool the first storage chamber and the second storage chamber, respectively, includes alternately cooling the first storage chamber and the second storage chamber.

In a possible embodiment, the fluid control unit opens a respective one of the first and second refrigeration lines connected in parallel at the inlet end to cool the respective storage chamber in the first stage, and opens the first and second refrigeration lines to cool the first and second storage chambers simultaneously in the second stage.

In a possible embodiment, the start-up cooling mode is exited when each storage compartment reaches its respective stop temperature.

In another aspect of the embodiments of the present invention, a method for a refrigeration apparatus includes N (N ≧ 2) refrigeration lines connected in parallel at the inlet end and the outlet end connected to a corresponding evaporator, and a fluid control unit for selectively opening or closing the refrigeration lines, the method including operating a start-up refrigeration mode, the start-up refrigeration mode including: in the first stage, the compressor is operated and the fluid control unit opens not more than M of the N refrigeration pipelines (M is more than or equal to 1 and less than N) at the same time, and in the second stage, the compressor is operated and the fluid control unit can simultaneously open the N refrigeration pipelines.

In a possible embodiment, said first phase comprises operating the compressor to open each of said N refrigeration circuits separately.

In another aspect of the embodiments of the present invention, a method for a refrigeration apparatus includes N (N ≧ 2) refrigeration pipelines connected in parallel at an inlet end and connected at an outlet end to respective evaporators, and a fluid control unit for selectively opening or closing the N refrigeration pipelines, the method including operating a start-up refrigeration mode, the start-up refrigeration mode including: in the first stage, the compressor is operated and not more than L (L is more than or equal to 1 and less than or equal to N) of the N refrigeration pipelines are respectively opened (L is more than or equal to 1 and less than or equal to N), and in the second stage, the compressor is operated and the N refrigeration pipelines can be all opened.

In a possible embodiment, the first stage comprises operating a compressor to deliver refrigerant to the L storage compartments in sequence.

In a possible embodiment, said first phase comprises the operation of the compressor to alternately open said L refrigeration circuits.

In a possible embodiment, the first stage comprises operating the compressor to deliver refrigerant to the N storage compartments sequentially or alternately.

In yet another aspect, an embodiment of the present invention relates to a method for a refrigeration apparatus, the refrigeration apparatus including a first refrigeration circuit, a second refrigeration circuit, and a fluid control unit, an inlet end of the first refrigeration circuit and an inlet end of the second refrigeration circuit being connected in parallel, an outlet end of the first refrigeration circuit being connected to a first evaporator, an outlet end of the second refrigeration circuit being connected to a second evaporator, the fluid control unit being configured to selectively open the first refrigeration circuit and/or the second refrigeration circuit, the method comprising: operating a start-up cooling mode, the start-up cooling mode comprising: operating the compressor; in a first phase, the fluid control unit opens the first refrigeration line and the first refrigeration line, respectively, in a staggered manner to supply refrigerant to the corresponding evaporator; and in a second phase, the fluid control unit opens both the first and second refrigeration lines to supply refrigerant to the first and second evaporators, respectively.

In a possible embodiment, during said first phase, the first refrigeration line and the second refrigeration line are supplied with refrigerant in sequence, or alternately.

In a possible embodiment, the output of the compressor in the second phase is higher than the output of the compressor in the first phase.

In a possible embodiment, the average speed of the compressor in the second phase is higher than the average speed of the compressor in the first phase.

In a possible embodiment, the speed of the compressor is kept constant from the first stage to the second stage.

In a possible embodiment, in the start-up cooling mode, the speed of the compressor is increased stepwise.

In a possible embodiment, in the start-up cooling mode, the speed of the compressor is increased stepwise in dependence on the compressor run time and/or the speed of the compressor is determined in connection with the state of the fluid control unit.

Another aspect of embodiments of the present invention relates to a refrigeration device adapted to perform a method as set forth in any of the above.

In a possible embodiment, in the normal cooling mode, the temperature of the first storage chamber is brought toward the target temperature of the first storage chamber by adjusting the speed of the compressor, the target temperature of the first storage chamber being higher than the stop temperature of the first storage chamber. Therefore, the temperature of the first storage chamber is not easy to reach the stop temperature of the first storage chamber, so that the compressor can keep running, which is beneficial to reducing the starting and stopping frequency of the compressor, reducing the noise and obviously reducing the energy consumption. The trend of the temperature of the first storage chamber toward the target temperature of the first storage chamber may include the temperature of the first storage chamber being substantially maintained at the target temperature and/or fluctuating slightly about the target temperature.

[ description of the drawings ]

FIG. 1 is a schematic view of a refrigeration unit according to one embodiment of the present invention.

Fig. 2 is a schematic diagram of a refrigeration system of a refrigeration appliance according to another embodiment of the present invention.

Fig. 3 is a schematic diagram of a refrigeration system of a refrigeration appliance according to yet another embodiment of the present invention.

Fig. 4 is a schematic system diagram of a refrigeration unit according to one embodiment of the present invention.

Fig. 5 is a flow chart of a method for a refrigeration appliance in a start-up refrigeration mode according to one embodiment of the present invention.

Fig. 6 is a schematic diagram of the state of the method for a refrigeration appliance in a start-up refrigeration mode with respect to the compressor, the first refrigeration circuit and the second refrigeration circuit according to an embodiment of the present invention.

Fig. 7 is a flow chart of a method for a refrigeration appliance in a normal refrigeration mode according to one embodiment of the present invention.

Fig. 8 is a flow chart of a method for a refrigeration appliance in a normal refrigeration mode according to yet another embodiment of the present invention.

Fig. 9 is a schematic variation diagram regarding a compressor speed, a first storage compartment temperature, and a second storage compartment temperature obtained in a normal cooling mode according to a method for performing an embodiment of the present invention for a cooling apparatus.

[ detailed description of the invention ]

When the cooling apparatus is powered on from a power-off state, for example, first powered on or powered off and then powered on again, a start-up cooling mode may be operated to rapidly cool each storage compartment before entering a normal cooling mode.

The start-up cooling mode may be selectively operated. For example, when the refrigeration apparatus is powered on, the control unit of the refrigeration apparatus determines whether the refrigeration apparatus should operate the start-up mode. If so, the operation starts the cooling mode.

The control unit from the power-off state to the power-on state can judge whether the refrigeration equipment should operate to start the refrigeration mode according to the information of the plurality of temperature sensors. In one embodiment, the refrigeration apparatus operates to start the cooling mode after being powered on when all the storage compartments have a cooling request and the temperatures of all the storage compartments and/or the temperatures of all the evaporators are higher than a preset temperature.

According to an embodiment of the present invention, when the refrigerating apparatus includes N (N ≧ 2) storage compartments, the starting of the cooling mode may include: in the first stage, the compressor is operated to cool only not more than M storage chambers of the N storage chambers at the same time (1 ≦ M < N); and, in a second stage, operating the compressor to simultaneously cool the N storage compartments.

For example, when the cooling apparatus is just powered on, even if N storage compartments all have cooling requests, only not more than M storage compartments of the N storage compartments are cooled at the same time. Thereafter, in a second stage, if the N storage compartments all have cooling requests, the N storage compartments are cooled simultaneously.

Determining whether a storage compartment has a cooling request may be accomplished by prior art means. For example, in one embodiment, a storage compartment is determined to have a cooling request when the temperature of the storage compartment is greater than the boot temperature of the storage compartment, and the cooling request may be determined to be satisfied when the temperature of the storage compartment is reduced to the shutdown temperature of the storage compartment.

In one embodiment, in the first stage, the compressor is operated to stagger and cool M (1L N) storage compartments separately. The M storage compartments may be sequentially cooled or alternately cooled.

In one embodiment, operating the compressor to cool no more than M of the N storage compartments at a time includes supplying refrigerant to no more than M refrigeration lines connected in parallel at an inlet end, wherein each refrigeration line is connected to a respective evaporator.

In one embodiment, the compressor may be operated to cool the L (1. ltoreq. L. ltoreq.N) storage compartments, respectively, in a first stage of starting the cooling mode, and the compressor may be operated to cool the N storage compartments simultaneously in a second stage.

The cooling of the N storage compartments at the same time may include supplying refrigerant to N refrigeration lines connected in parallel at inlet ends, each of the refrigeration lines having an outlet end connected to a corresponding evaporator such that each evaporator is supplied with refrigerant.

Stagger cooling the L storage compartments may include alternately cooling the L storage compartments or sequentially cooling the L storage compartments.

The first stage may include operating the compressor to stagger cooling the L storage compartments in groups. Each group of storage compartments includes at least one storage compartment. For example, in one embodiment, the first stage may cool each of the L storage compartments separately. The first stage may include sequentially cooling each of the N storage compartments. Alternatively, the first stage may include alternately cooling each of the L storage compartments.

When N ≧ 3, at least one group of the storage compartments may include two storage compartments. For example, when N is 3, one storage chamber and the other two storage chambers may be cooled in sequence or alternately.

Therefore, the temperature of each storage chamber can be quickly reduced, and the possibility that the compressor is stopped because the protection device is started due to overhigh pressure of the refrigerating system can be reduced, so that the refrigerating equipment can be quickly and reliably cooled down in the starting refrigerating mode.

Some exemplary embodiments are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a refrigeration unit 100 according to an exemplary embodiment of the present invention. As shown in fig. 1, the refrigerating apparatus 100 may include a first storage chamber 1 and a second storage chamber 2. The first storage chamber 1 and the second storage chamber 2 are thermally isolated. The first storage chamber 1 and the second storage chamber 2 may be adjacently disposed or separated by another storage chamber.

The refrigerating apparatus 100 includes a refrigerating system 3 to cool the first storage chamber 1 and the second storage chamber 2. In an exemplary embodiment, the refrigeration system 3 includes a compressor 4, a condenser 5, an expansion device (not shown in fig. 1), a fluid control unit 7, and first and second evaporators 81 and 82 connected by a line carrying refrigerant. The first evaporator 81 is used to cool the first storage chamber 1, and the second evaporator 82 is used to cool the second storage chamber 2.

The refrigerant flows from the compressor 4 to the first evaporator 81 and the second evaporator 82 through the condenser 5. The arrows on the lines connecting the various components in fig. 1 schematically show the direction of flow of the refrigerant.

In an exemplary embodiment, the temperature of the second storage chamber 2 is higher than that of the first storage chamber 1. For example, the first storage chamber 1 is a freezing chamber, and the second storage chamber 2 includes a storage chamber of a non-freezing temperature region. For example, the set temperature range of the second storage chamber 2 may be selected from any range of-4 to 12 degrees, such as 2 to 8 degrees celsius, or 2 to 12 degrees celsius, -2 to 2 degrees celsius, -4 to 4 degrees celsius, 0 to 2 degrees celsius, and the like.

As shown in fig. 1, the refrigerant output from the condenser 5 flows into the first evaporator 81 through the first refrigeration line 31. The refrigerant output from the condenser 5 flows into the second evaporator 82 through the second refrigeration line 32. The inlet ends of the first refrigeration line 32 and the second refrigeration line 32 are connected in parallel.

The fluid control unit 7 serves to selectively deliver the refrigerant output from the condenser 5 to the first refrigeration line 31 and/or the second refrigeration line 32. A fluid control unit 7 is located downstream of the condenser 5.

A dryer 63 may be provided between the fluid control unit 7 and the condenser 5. In this embodiment, the first refrigeration line 31 and the second refrigeration line 32 are connected in parallel in the dryer 63.

The fluid control unit 7 may include a first shut-off valve 71 located in the first refrigeration line 31 to control the opening and closing of the first refrigeration line 31. When the first cutoff valve 71 opens the first refrigeration line 31, the refrigerant output from the compressor 4 may be supplied to the first evaporator 81 located downstream of the first refrigeration line 31 to cool the first storage chamber 1 corresponding to the first evaporator 81. The first cutoff valve 71 is located between the dryer 63 and the first evaporator 81.

The fluid control unit 7 may comprise a second shut-off valve 72 located in the second refrigeration line 32 to control the second refrigeration line 32. When the second cutoff valve 72 opens the second refrigeration line 32, the refrigerant output from the compressor 4 may be supplied to the second evaporator 82 located downstream of the second refrigeration line 32, so that the second storage chamber 2 corresponding to the second evaporator 82 is cooled. The second shut-off valve 72 is located between the dryer 63 and the second evaporator 82.

The cooling apparatus 100 may include a first fan 121 for the first storage room 1, and a second fan 122 for the second storage room 2. When the first storage chamber 1 is cooled, the first fan 121 is operated. When the second storage chamber 2 is cooled, the second fan 122 is operated.

The cooling apparatus 100 may include a third fan 51 disposed near the condenser 5 to improve heat dissipation efficiency of the condenser 5.

Fig. 2 is a refrigeration system 3a for a refrigeration appliance 100 according to another embodiment of the present invention. The main difference between the refrigeration system 3a and the refrigeration system 3 shown in fig. 1 is the fluid control unit.

As shown in fig. 2, the refrigeration system 3a includes a compressor 4a, a condenser 5a, a dryer 6a, a fluid control unit 7a, and a first evaporator 81a and a second evaporator 82a located downstream of the fluid control unit 7 a. A first expansion device 61a may be provided between the first evaporator 81a and the fluid control unit 7a, and a second expansion device 62a may be provided between the second evaporator 82a and the fluid control unit 7 a.

The refrigeration system 3a may include a first fan 121a for the first storage chamber 1, and a second fan 122a for the second storage chamber 2. The refrigeration system 3a may include a third fan 51a disposed near the condenser 5a to improve heat dissipation efficiency of the condenser 5 a.

The fluid control unit 7a includes a rotary valve 71 a. The rotary valve 71a includes a first outlet communicating with the first refrigeration line 31a and a second outlet through which the second refrigeration line 32a is connected. The first refrigeration line 31a and the second refrigeration line 32a are connected in parallel by the rotary valve 71 a.

The rotary valve 71a may comprise a stepper motor, and the opening and closing of the first outlet and the second outlet is determined by the position of the stepper motor. By controlling the stepping motor of the rotary valve 71a, four cases of opening only the first outlet, opening only the second outlet, opening both the first outlet and the second outlet, and closing both the first outlet and the second outlet can be achieved.

When only the first outlet is opened, the refrigerant output from the compressor 4a may be supplied to the first evaporator 81a through the first refrigeration line 31a after passing through the condenser 5 a. The refrigerant evaporates in the first evaporator 81a, and the first storage chamber 1 is cooled.

When only the second outlet is opened, the refrigerant output from the compressor 4a may be supplied to the second evaporator 82a through the second refrigeration line 32 a. The refrigerant evaporates in the second evaporator 82a, and the second storage chamber 2 is cooled.

When both the first outlet and the second outlet are open, the refrigerant output from the compressor 4a may be supplied to the first evaporator 81a through the first refrigeration line 31a and the second evaporator 82a through the second refrigeration line 32a in parallel. The refrigerant is evaporated in the first evaporator 81a and the second evaporator 82a, respectively, and the first storage chamber 1 and the second storage chamber 2 can be cooled at the same time.

Fig. 3 is a refrigeration system 3b for a refrigeration appliance 100 according to another embodiment of the present invention. As shown in fig. 3, the refrigeration system 3a includes a compressor 4b, a condenser 5b, a dryer 63b, a fluid control unit 7b, and a first evaporator 81b and a second evaporator 82b located downstream of the fluid control unit 7 b. The first evaporator 81b is used to cool the first storage chamber 1, and the second evaporator 82b is used to cool the second storage chamber 2.

A first expansion device 61b may be provided between an inlet end of the first evaporator 81b and an outlet end of the fluid control unit 7b, and a second expansion device 62b may be provided between an inlet end of the second evaporator 82b and an outlet end of the fluid control unit 7 b.

The fluid control unit 7b may have the same configuration as the fluid control unit 7a and therefore will not be heavily described here.

The refrigerating system 3b may include a first fan 121b for the first storage chamber 1, and a second fan 122b for the second storage chamber 2. The refrigeration system 3b may further include a third fan 51b disposed near the condenser 5b to improve the heat dissipation efficiency of the condenser 5 b.

Unlike the embodiment of fig. 2, in the embodiment shown in fig. 3, the refrigerant output from the second evaporator 82b is returned to the compressor 4b via the first evaporator 81 b. If the refrigerant flowing out of the second evaporator 82b is not entirely evaporated, the refrigerant that is not evaporated while passing through the first evaporator 81b may be in the first evaporator 81b, thereby improving the cooling efficiency of the refrigeration system. This advantage is particularly evident when the first evaporator 81b is refrigerating for the freezer compartment and the second evaporator 82b is refrigerating for the cold storage warm zone.

When the refrigerant is supplied only to the first refrigeration line 31b of the first refrigeration line 31b and the second refrigeration line 32b by controlling the fluid control unit 7b, the refrigerant is evaporated in the first evaporator 81b to cool the first storage chamber 1.

When the refrigerant is supplied only to the second refrigerating line 32b of the first and second refrigerating lines 31b and 32b, the second storage chamber 2 is cooled. Sometimes, the incompletely evaporated refrigerant discharged from the second evaporator 32b may be evaporated in the first evaporator 81b to improve the efficiency of the refrigeration system 3 b.

When the rotary valve 71b simultaneously opens the first and second refrigeration lines 31b and 32b to simultaneously supply the refrigerant to the first and second refrigeration lines 31b and 32b in parallel, the first and second storage chambers 1 and 2 are simultaneously cooled.

Referring to fig. 4 in conjunction with fig. 1 to 3, the refrigeration apparatus 100 may include a first temperature detection unit 91 for detecting the temperature of the first storage chamber 1 and a second temperature detection unit 92 for detecting the temperature of the second storage chamber 2. The first and second temperature detection units 91 and 92 may include at least one temperature sensor, respectively.

In one exemplary embodiment, the first and second temperature detection units 91 and 92 include at least two temperature sensors, respectively. The temperatures of the first storage chamber 1 and the second storage chamber 2 may be calculated by at least two temperature sensors, respectively.

The refrigeration device 100 may include an input unit 10 to receive user input. The input unit 10 may receive a set temperature T of a user with respect to the first storage chamber 1_set1And the set temperature T of the second storage chamber 2_set1. Usually, a set temperature T of a storage room_set1Is the user's desired temperature for the storage compartment.

The refrigeration device 100 comprises a control unit 11. The control unit 11 is coupled to the first temperature detection unit 91, the second temperature detection unit 92 and the input unit 10 as well as to the refrigeration systems 3, 3a, 3 b. The control unit 11 controls the operation of the compressors 4, 4a, 4b, the fluid control units 7, 7a, 7b, the first fans 121, 121a, 121b, the second fans 122, 122a, 122b, and the third fans 51, 51a, 51b of the refrigeration systems 3, 3a, 3b based on the feedback from the first temperature detection unit 91 and the second temperature detection unit 92.

Environmental parameters such as ambient temperature and/or ambient humidity may also be input parameters for the control unit 11 to control the refrigeration system 3. The refrigeration appliance 100 may include an ambient temperature sensor 93 to detect the temperature of the environment in which the refrigeration appliance 100 is located. The refrigeration unit 100 may include an ambient humidity sensor (not shown) to detect the humidity of the environment in which the refrigeration unit 100 is located.

In an exemplary embodiment, at least a portion of the input unit 10 and/or the control unit 11 may be disposed on the main body 101 of the cooling device 100 and/or a door (not shown) to close the storage compartment.

In another embodiment, the input unit 10 and/or the control unit 11 of the refrigeration device 100 are at least partially provided in a remote device separate from the body 101/the refrigeration device door. For example, the user can set the set temperatures of the first storage chamber 1 and the second storage chamber 2 through a remote terminal. As another example, the refrigeration systems 3, 3a, 3b are controlled based on instructions from the remote control unit 11 by transmitting temperature information obtained by the temperature detection unit provided to the main body 101 to the control unit 11 located at the remote server.

The control unit 11 can control the set temperature T of the first storage chamber 1 inputted by the user_set1And the set temperature T of the second storage chamber 2_set1The refrigeration systems 3, 3a, 3b are controlled in association.

The input unit 10 is adapted to receive a set temperature T of the first storage chamber 1 input by a user_set1And the set temperature T of the second storage chamber 2_set1Thereby obtaining the temperatures that the user wants to obtain with respect to the first storage chamber 1 and the second storage chamber 2.

The user can set the temperature T of the first storage chamber 1 as desired_set1And the set temperature T of the second storage chamber 2_set1The setting is performed. After the user sets the temperature of the first storage chamber 1 or the second storage chamber 2, if the input unit 10 does not receive a new input about the set temperature from the user, the original set temperature is maintained.

The control unit 11 may be set according to the set temperature T of the first storage chamber 1_set1Determining a stop temperature of the first storage chamber_Tstop1(hereinafter referred to as "first stop temperature_Tstop1"), first stop temperature_Tstop1Lower than the set temperature T of the first storage chamber 1_set1. When the temperature of the first storage chamber 1 falls to a first stop temperature_Tstop1When the control unit 11 determines that the refrigeration system 3 should stop cooling the first storage chamber 1.

According to the set temperature T of the second storage chamber 2_set1The control unit 11 may determine a stop temperature of the second storage chamber 2_Tstop2(hereinafter referred to as "second stop temperature_Tstop1"), a second stop temperature_Tstop2Lower than the set temperature T of the second storage chamber 1_set1. When the temperature of the second storage chamber 2 falls to a second stop temperature_Tstop2When this occurs, the control unit 11 determines that the refrigeration system 3 should stop cooling the second storage chamber 2.

It should be understood that the first stop temperature_Tstop1And a second stop temperature_Tstop2Can be respectively only according to the corresponding set temperature T_set1And T_set2But is not limited to such an embodiment. In other embodiments, in addition to the set temperature input by the userOther parameters such as the ambient temperature, the structural coefficients of the first and second storage compartments may also be used as adjustment coefficients to determine the first stop temperature_Tstop1And a second stop temperature_Tstop2。

The control unit 11 may be set according to the set temperature T of the first storage chamber 1_set1Determining a boot temperature of a first storage compartment_Tstart1(hereinafter referred to as "first boot temperature_Tstart1") wherein, when the temperature of the first storage room 1 is higher than the first starting temperature_Tstart1At this time, the control unit 11 confirms that the refrigeration system 3 needs to refrigerate the first storage room 1.

When the first storage chamber 1 and/or the second storage chamber 2 has a cooling request, the fluid control units 7, 7a, 7b open the respective cooling lines to cool the respective storage chambers in the cooling system shown in fig. 1 to 3, the refrigerant can be fed in parallel to the different evaporators to cool the different storage chambers simultaneously. Therefore, in the ordinary cooling mode, when both the first storage chamber 1 and the second storage chamber 2 have a cooling request, the first cooling line 31, 31a, 31b and the second cooling line 32, 32a, 32b may be all opened, and the first evaporator 81, 81a, 81b and the second evaporator 82, 82a, 82b all receive the refrigerant to cool the respective storage chambers in parallel.

According to an embodiment of the present invention, when the refrigeration apparatus 100 operates in the start-up refrigeration mode performed after being switched from the unpowered state to the powered state, the control unit 11 controls the refrigeration system 3, 3a, 3b in a manner different from the ordinary refrigeration mode.

Fig. 5 is a schematic flow diagram of the initiation of a cooling mode according to one embodiment of the present invention. Referring to fig. 5 in conjunction with fig. 1 to 4, the starting of the cooling mode includes: in the first stage, as shown in step S51, the first storage room 1 and the second storage room 2 are cooled, respectively, when both the first storage room 1 and the second storage room 2 have a cooling request. In the second stage, as shown in step S52, the first storage room 1 and the second storage room 2 are cooled simultaneously when both the first storage room 1 and the second storage room 2 have a cooling request.

This advantageously prevents the compressor 4, 4a, 4b from being shut down because the protection device is activated because of the overpressure in the refrigeration system, since the first and second storage compartments are cooled off in a staggered manner in the first stage before they are cooled simultaneously.

The staggered cooling of the first storage chamber and the second storage chamber may be achieved by a fluid control unit to control a flow direction of the refrigerant or by an air valve to control whether to supply cold air to one or more storage chambers. For example, the fluid control unit opens the respective refrigeration lines in a staggered manner to operate the different refrigeration cycles in a staggered manner, or by controlling the air valves, delivers cold air to the different storage compartments in a staggered manner.

It will be appreciated that if the higher temperature setting of the first and second storage compartments 1, 2 has first reached its shutdown temperature in the start-up cooling mode so that its cooling request has been fulfilled, it is possible that in the second phase of the start-up cooling mode there is separate cooling of the first and second storage compartments 1, 2 that has not yet reached the shutdown temperature, before the storage compartment issues a cooling request again. When both the first storage room 1 and the second storage room 2 can be cooled at the same time in the second stage, and the first storage room 1 and the second storage room 2 are cooled in the first stage if there is a mistake.

The average output of the compressor 4, 4a, 4b during the second phase may be higher than the average output of the compressor during the first phase.

For the refrigeration systems of fig. 1-3, in a first phase of the start-up refrigeration mode, the fluid control unit causes the first refrigeration line and the first refrigeration line to open in offset to supply refrigerant to the respective evaporators in offset. In a second stage of the start-up cooling mode, the fluid control unit may cause both the first cooling line and the second cooling line to be open to supply refrigerant to the first evaporator and the second evaporator, respectively.

For example, in the second stage, when both the first storage chamber 1 and the second storage chamber 2 have a cooling request, both the first cooling line and the second cooling line are opened to supply the refrigerant to the first evaporator and the second evaporator, and the first storage chamber 1 and the second storage chamber 2 are cooled at the same time.

The first stage may include a first sub-stage in which refrigerant output from the compressor is delivered only to the first refrigeration line and a second sub-stage in which refrigerant is delivered only to the second refrigeration line, wherein the inlet ends of the first and second refrigeration lines are connected in parallel.

Fig. 6 shows a schematic state diagram of the different components of the refrigeration system 3, 3a, 3b in the start-up refrigeration mode. As shown in fig. 6, when the refrigeration apparatus 100 enters the start-up refrigeration mode, the compressors 4, 4a, 4b are operated. Between times t0 and t2, the fluid control unit 7, 7a, 7b opens the first refrigeration circuit 31, 31a, 31b, the second refrigeration circuit 32, 32a, 32b is closed, and the refrigerant discharged from the condenser 5, 5a, 5b is supplied to the first evaporator 81, 81a, 81 b. The first storage chamber 1 is cooled.

Between times t2 and t3, the fluid control unit 7, 7a, 7b opens the second refrigeration line 32, 32a, 32b, closes the first refrigeration line 31, 31a, 31b, and the refrigerant discharged from the condenser 5, 5a, 5b is supplied to the second evaporator 82, 82a, 82 b. The second storage chamber 2 is cooled.

After time t3, the fluid control unit 7, 7a, 7b opens the first refrigeration line 31, 31a, 31b and the second refrigeration line 32, 32a, 32b, and the refrigerant discharged from the condenser 5, 5a, 5b is supplied in parallel to the first evaporator 81, 81a, 81b and the second evaporator 82, 82a, 82 b. The first storage chamber 1 and the second storage chamber 2 are cooled simultaneously.

Therefore, with the time t3 as a boundary, the cooling mode is started up in a first stage of cooling the first storage room 1 and the second storage room 2 in a staggered manner when both the first storage room 1 and the second storage room 2 have a cooling request, and in a second stage of cooling both the first storage room 1 and the second storage room 2 if both the first storage room 1 and the second storage room 2 have a cooling request.

In fig. 6, the first storage chamber 1 and the second storage chamber 2 are sequentially cooled in the start cooling mode.

In the embodiment in which the first storage chamber 1 and the second storage chamber 2 are sequentially cooled, the cooling time of the first storage chamber 1 and the second storage chamber 2 may be determined according to the temperature of the respective storage chambers or the respective preset time periods. For example, when the temperature of the first storage chamber 1 reaches the first preset temperature, the first cooling circuit 31, 31a, 31b is closed, and the second cooling circuit 32, 32a, 32b is opened, i.e., switching from cooling the first storage chamber 1 to cooling the second storage chamber 2. Alternatively, when the cooling time of the first storage chamber 1 reaches the first preset time, it is switched to cool the second storage chamber 2.

In the embodiment in which the first storage chamber 1 is cooled before the second storage chamber 2 is cooled, completion of the first stage of starting the cooling mode may be confirmed when the temperature of the second storage chamber 2 reaches the second preset temperature. Or, in an alternative embodiment, completion of the first stage of starting the cooling mode is confirmed when the cooling time of the second storage chamber 2 reaches the second length of time.

In one exemplary embodiment, when the temperature of the first storage chamber 1 reaches a first preset temperature, it is switched to cool the second storage chamber 2. When the cooling time of the second storage chamber 2 reaches the second preset time, completion of the first stage of the startup mode is confirmed. This is particularly advantageous when the first storage chamber 1 is a freezer chamber and the second storage chamber 2 is a non-freezer chamber. When the first storage chamber 1 is a freezing chamber and the second storage chamber 2 is a non-freezing chamber, the cooling time of the second storage chamber 2 may be significantly shorter than that of the first storage chamber 1.

In an exemplary embodiment, the average operating speed of the compressor 4, 4a, 4b in the first stage may not be higher than the average operating speed in the second stage. In some embodiments, the average operating speed of the compressor 4, 4a, 4b during the first phase is lower than the average operating speed during the second phase.

As shown in fig. 6, in the start-up cooling mode, the speed of the compressors 4, 4a, 4b may be increased stepwise.

In one embodiment, the speed of the compressor 4, 4a, 4b may be substantially constant while operating at one speed level until it is increased to another speed level in the start-up cooling mode.

In the start-up cooling mode, the compressor 4, 4a, 4b can be operated in a preset mode.

For example, in the start-up cooling mode, the speed of the compressor 4, 4a, 4b may be independent of the state of the fluid control unit 7, 7a, 7 b.

As another example, in starting the cooling mode, the speed of the compressor 104 when cooling the storage chamber 101 may be determined regardless of the temperature of the storage chamber 101.

In one embodiment, the speed of the compressor 4, 4a, 4b may be determined based on the run time of the compressor 4, 4a, 4 b. For example, when the compressor 4, 4a, 4b is operating between times t0 and t1, at the first speed v 1. When the first preset time T1 elapses, the compressor 4, 4a, 4b is operated at the second speed v2 higher than the first speed v1 from the time T1. When the second preset time T2 elapses, the compressor 4, 4a, 4b is operated at a third speed v3 higher than the second speed v2 from the time T4.

The speed of the compressor 4, 4a, 4b can be upgraded from one speed level to another independently of the temperature of the first and second storage chambers 1, 2.

The operating speed of the compressor 4, 4a, 4b may also be determined from the condensing pressure/temperature of the refrigerant. For example, when the condensation pressure/temperature of the refrigerant reaches a preset value, the speed of the compressor 4, 4a, 4b is increased.

In one embodiment, the speed of the compressor 4, 4a, 4b may be correlated to the state of the fluid control unit 7, 7a, 7 b. For example, when the fluid control unit 7, 7a, 7b opens the first refrigeration line 31, 31a, 31b and the second refrigeration line 32, 32a, 32b, the speed of the compressor 4, 4a, 4b is increased. Alternatively, the speed of the compressor 4, 4a, 4b is increased a predetermined time after the fluid control unit 7, 7a, 7b opens the first refrigeration circuit 31, 31a, 31b and the second refrigeration circuit 32, 32a, 32 b.

For another example, the compressors 4, 4a, 4b are operated at a first speed during a period when the fluid control unit opens the first refrigeration circuit and closes the second refrigeration circuit, and the compressors 4, 4a, 4b are operated at a second speed after the fluid control unit switches from opening the first refrigeration circuit and closing the second refrigeration circuit to opening the second refrigeration circuit, closing the first refrigeration circuit, or after a predetermined extended time from the switching.

When the compressors 4, 4a, 4b are operated, the condenser fan 51 is also operated. The condenser fans 51, 51a, 51b may be intermittently operated. The output power of the condenser fan 51, 51a, 51b may be increased as the speed of the compressor 4, 4a, 4b is increased.

When the first refrigeration line 31, 31a, 31b is opened, the first fan 121, 121a, 121b may be intermittently operated. The average output power of the first fan 121, 121a, 121b in the first stage may be higher than the output power in the second stage.

When the second refrigeration line 32, 32a, 32b is opened, the first fan 121, 121a, 121b may be intermittently operated.

In the embodiment described above, the first storage room 1 and the second storage room 2 are sequentially cooled in the first stage. This may include embodiments in which the first storage compartment 1 is first cooled and the second storage compartment 2 is then cooled, and may also include embodiments in which the second storage compartment is first cooled and the first storage compartment 1 is then cooled.

It should be understood that, in an alternative embodiment, the first storage chamber 1 and the second storage chamber 2 may be alternately cooled a plurality of times until the first-stage exit condition is satisfied to start cooling the first storage chamber 1 and the second storage chamber 2 simultaneously.

In the above-described embodiment, in the first stage, the first storage room 1 and the second storage room 2 are cooled at different times, respectively. In another embodiment, only the first storage chamber 1 or the second storage chamber 2 may be cooled in a first stage, and then a second stage in which the first storage chamber 1 and the second storage chamber 2 may be cooled simultaneously may be entered.

By dividing the cooling mode into a first stage of cooling only one of the first storage chamber 1 and the second storage chamber 2 at a time and a second stage of cooling both the first storage chamber and the second storage chamber, the refrigeration apparatus can be cooled down quickly while reducing the pressure of the refrigeration system.

After the first storage chamber 1 and the second storage chamber 2, respectively, have been cooled to the respective shutdown temperatures in the start-up cooling mode, the operation of the compressors 4, 4a, 4b is stopped and the start-up cooling mode ends.

The first storage chamber 1 and the second storage chamber 2 can reach respective shutdown temperatures at different times. The end of the cooling mode can be initiated when the last storage compartment reaches its shutdown temperature.

For example, in the startup cooling mode, the second storage room 2 set to the non-freezing temperature storage room may reach its shutdown temperature first. When the refrigeration system 3, 3a, 3b is still cooling the first storage compartment 1 in the start-up refrigeration mode, the refrigeration system 3, 3a, 3b may work again for the second storage compartment 2 in the start-up refrigeration mode as the temperature of the second storage compartment 2 rises back to reach the start-up temperature in the start-up refrigeration mode.

The stop temperature of the first storage chamber 1 in the start-up cooling mode and the stop temperature of the second storage chamber 2 in the start-up cooling mode may be fixed to reduce external interference, thereby ensuring that the cooling apparatus 100 can be safely started up. It is also possible that the stop temperature of the first storage compartment 1 in the start-up cooling mode and the stop temperature of the second storage compartment 2 in the start-up cooling mode are different from the respective stop temperatures of the first storage compartment 1 and the second storage compartment 2 in the following ordinary cooling mode, respectively.

In another embodiment, the shutdown temperature of the first and second storage rooms 1 and 2 in the start cooling mode and the shutdown temperature in the normal cooling mode may have the same calculation method. When the user set temperature of the first storage chamber 1 and the second storage chamber 2 in the start cooling mode and the set temperature of the first storage chamber 1 and the second storage chamber 2 in the normal cooling mode are respectively the same, it becomes possible that the stop temperature of the first storage chamber 1 and the second storage chamber 2 in the start cooling mode and the stop temperature of the first storage chamber 1 and the second storage chamber 2 in the normal cooling mode are respectively the same.

After the refrigeration mode is started and before the normal refrigeration mode is entered, the refrigeration apparatus 100 may optionally perform a defrosting procedure. Performing the defrosting process immediately after the cooling mode is activated facilitates removing frost attached to the evaporator in the cooling mode to increase cooling efficiency.

In the normal cooling mode, when both the first storage chamber 1 and the second storage chamber 2 have a cooling request, the compressors 4, 4a, 4b and the fluid control units 7, 7a, 7b open the first cooling lines 31, 31a, 31b and the second cooling lines 32, 32a, 32b to supply the refrigerants thereto. When one of the first and second storage chambers 1 and 2 has a cooling request, the compressor 4, 4a, 4b operates and supplies refrigerant to the corresponding cooling line. The operation method of the refrigerating apparatus 100 in the normal refrigerating mode is described in detail below.

In an exemplary embodiment, in the normal cooling mode, the control unit 11 adjusts the speed of the compressors 4, 4a, 4b to make the temperature of the first storage chamber 1 higher than the first stop temperature T_stop1Thereby keeping the compressor 4, 4a, 4b running.

It will be readily appreciated that in some special procedures/situations, for example when defrosting is required or in a special cooling mode, the temperature of the first storage compartment 1 needs to be/can be cooled to the first shutdown temperature T_stop1The following.

In an exemplary embodiment, in the normal cooling mode, the control unit 11 adjusts the speed of the compressors 4, 4a, 4b so that the temperature of the first storage chamber 1 tends to be higher than the first stop temperature T_stop1Target temperature T of_target1. Thus, the temperature of the storage chamber 101 is precisely controlled, which is advantageous for the compressor 104 to operate for a long time at a speed substantially matching the required cooling capacity of the storage chamber 101, and for improving energy efficiency.

The temperature of the first storage chamber 1 tends to the target temperature T of the first storage chamber_target1May include maintaining the temperature of the first storage chamber substantially at the target temperature T_target1And/or around the target temperature T_target1Small fluctuation, thereby reducing the temperature of the first storage room 1 to the first stop temperature T_stop1And the temperature of the first storage chamber 1 is kept at or near the target temperature T of the first storage chamber 1 for a long time_target1。

For example, when the temperature of the first storage chamber 1 gradually approaches the target temperature T of the first storage chamber 1_target1Thereafter, the compressor 4, 4a, 4b is operated to maintain the first storage chamber 1 at the target temperature T of the first storage chamber 1_target1Required cold quantityRunning at a matched speed. The temperature of the first storage chamber 1 is maintained at the target temperature T for a long time without interference of external factors_target1Are possible.

For example, the temperature of the first storage chamber 1 may be from a target temperature T remote from the first storage chamber_target1To gradually approach the target temperature T of the first storage chamber 1_target1. As another example, when the temperature of the first storage chamber 1 approaches the target temperature T_target1Thereafter, by adjusting the speed of the compressors 4, 4a, 4b, the temperature of the first storage chamber 1 can be maintained substantially at the target temperature T of the first storage chamber 1_target1Or fluctuates slightly up and down around the target temperature of the first storage chamber 1.

Theoretically, if the speed and power regulation range of the compressor 4, 4a, 4b is large enough, it is possible for the compressor 4, 4a, 4b to maintain operation for a long time without special needs (e.g., defrosting) or external accidents (e.g., power outage). This does not exclude special cases, for example, when the ambient temperature is so low that the compressor cannot avoid the temperature of the first storage compartment 1 falling to the shutdown temperature of the first storage compartment 1 at the minimum operating speed/power, the compressor stops operating for the first storage compartment.

Target temperature T of the first storage chamber 1_target1Can be adjusted according to the set temperature T of the first storage chamber 1_set1And (4) determining. Target temperature T of the first storage chamber 1_target1May be the set temperature T of the first storage chamber 1_set1. There is a possibility that the temperature of the first storage chamber 1 is maintained at the set temperature T of the first storage chamber 1 for a long time_set1Or surrounding the set temperature T of the first storage chamber 1_set1Small fluctuations allow the user's expectations to be met more precisely.

In one embodiment, the target temperature T of the first storage chamber 1_target1Can approach the set temperature T of the first storage chamber 1_set1. For example, the target temperature T of the first storage chamber 1_target1Can be matched with the set temperature T of the first storage chamber 1_set1Within plus or minus 0.5 k.

The speed of the compressor 4, 4a, 4b can be adjusted in relation to the temperature of the first storage chamber 1To make the temperature of the first storage chamber 1 approach the target temperature T of the first storage chamber 1_target1. Due to the target temperature T of the first storage chamber 1_target1Above the first stop temperature_Tstop2Whereas in the presence of a refrigeration request, it is expected that the compressor 4, 4a, 4b will remain in operation for a long period of time. The temperature of the first storage chamber 1 is maintained at the target temperature T of the first storage chamber 1 by adjusting the speed of the compressor 4, 4a, 4b_target1The temperature of the first storage chamber 1 can be maintained relatively accurately at/near a desired temperature, for example at/near a set temperature T of the first storage chamber 1_set1。

By adjusting the speed of the compressors 4, 4a, 4b in real time based on the temperature of the first storage chamber 1 obtained by the first temperature detection unit 91, it is advantageous to achieve that the speed of the compressors 4, 4a, 4b is adjusted to a target temperature T at which the first storage chamber 1 is substantially maintained at the first storage chamber 1 after a period of operation_target1The degree of matching.

It should be understood that when the temperature detecting unit detects the temperature of the storage chamber, if the temperature detecting unit cannot truly represent the actual temperature of the storage chamber due to the position relationship, that is, if there is a difference between the detected value obtained by the temperature detecting unit and the actual temperature of the storage chamber, it is common practice to correct the detected temperature or the actual temperature so that the detected temperature or the actual temperature can be compared under a unified standard. For example, the control unit corrects the detected value obtained by the temperature detection unit to its corresponding actual temperature, or the control unit corrects the actual temperature that can be sensed by the user (e.g., a target temperature displayed on a user interface, an actual temperature in the storage chamber) to be under the same standard as the detected value of the temperature detection unit. For example, the control means compares the temperature obtained by the corrected temperature detection means with a temperature value under an actual temperature standard (for example, a numerical value of a set temperature of the storage room displayed to the user). For another example, the control unit converts the actual temperature that can be sensed by the user and then compares the converted actual temperature with the temperature obtained by the temperature detection unit. Correspondingly, the shutdown temperature and the startup temperature of the storage room can also be determined according to the value of the converted set temperature in the control unit so as to be compared with the detected temperature obtained by the temperature detection unit. Therefore, the "temperature of the first/second storage chamber", "set temperature of the first/second storage chamber", "target temperature of the first/second storage chamber", "starting temperature of the first/second storage chamber", and "stopping temperature of the first/second storage chamber" should be under the same standard, but not limited to, a detection temperature standard or an actual temperature standard.

Adjusting the speed of the compressor 4, 4a, 4b in association with the temperature of the first storage chamber 1 may include: reducing the speed of the compressor 4, 4a, 4b to bring the temperature of the first storage chamber 1 from the target temperature T of the first storage chamber 1_target1And stop temperature of the first storage chamber 1_Tstop1Towards the target temperature T of the first storage chamber 1_target1And (4) rising. Thereby, the compressor 4, 4a, 4b maintains the temperature of the first storage chamber 1 at the target temperature T_target1It is possible to operate for a long time at a speed matched with the required refrigeration capacity. This is advantageous not only in reducing power consumption but also in improving the accuracy of temperature control of the first storage chamber 1.

Based on the temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1_target1The temperature difference therebetween to adjust the speed of the compressor 4, 4a, 4b may include: based on the average temperature of the first storage compartment 1 or the current instantaneous temperature of the first storage compartment 1 and the target temperature T of the first storage compartment 1 during the current time interval_target1The temperature difference between them to regulate the speed of the compressor 4, 4a, 4 b.

The current instantaneous temperature of the first storage chamber may be a recently obtained temperature of the first storage chamber. The average temperature in the current time interval may comprise an average of the first N sampled temperatures including the most recently obtained instantaneous temperature. N may for example be between 3 and 30.

The speed of the compressor is adjusted according to the average temperature of the plurality of sampled temperatures of the first storage chamber 1 in the current time interval, which is advantageous for the compressor 4, 4a, 4b to operate more smoothly. Adjusting the speed of the compressor in dependence on the instantaneous temperature of the first storage chamber then facilitates a faster reaction of the compressor 4, 4a, 4b to adjust the temperature of the storage chamber.

In some embodiments, adjusting the speed of the compressor 4, 4a, 4b according to the temperature of the first storage chamber 1 may include: the compressor speed is determined based on a base speed S0 and an adjustment speed Sv determined according to the temperature of the storage chamber. For example, the compressor speed may be equal to S0+ Sv.

In some embodiments, the base speed S0 may be the ambient temperature and/or the target temperature T of the first storage compartment_target1Set temperature T_set1The speed of the match. Accordingly, the base speed S0 may be based on the ambient temperature and/or the target temperature T of the first storage compartment 1_target1But may vary.

The base speed S0 may be preset. For example, the temperature may be set according to the current ambient temperature and the target temperature T of the first storage chamber_target1Set temperature T_set1And a base speed S0 corresponding thereto is determined.

The adjusting speed Sv may be based on the temperature T of the first storage chamber and the target temperature T_target1The temperature difference therebetween. May be based on the temperature of the first storage chamber and the target temperature T of the first storage chamber_target1The temperature difference therebetween to determine whether to operate at a speed higher than the base speed S0 or lower than the base speed S0.

For example, when the temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1_targetThe temperature difference therebetween is negative (when the temperature of the storage chamber 1 is lower than the target temperature T)_target) At a speed lower than the base speed S0. Otherwise, the operation is performed at a speed higher than the base speed S0.

It was proved by our experiments that on the basis of the base speed S0, a temperature according to the first storage compartment and the target temperature T of the first storage compartment 1 is used_target1The speed of the compressor 4, 4a, 4b is determined by determining the regulation speed Sv based speed S0 based on the temperature difference therebetween, which is advantageous for achieving a faster approach of the temperature of the first storage chamber 1 to the target temperature T_target1。

The temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1_target1The temperature difference therebetween may be in a linear relationship with the adjustment speed Sv. In alternative embodiments, the temperature may be varied according to the temperature of the first storage chamber 1Target temperature T_target1The temperature difference therebetween is within a range to determine the corresponding adjustment speed Sv.

The adjustment speed Sv may be determined, for example, by increasing/decreasing a predetermined speed amplitude modulation per a predetermined temperature difference.

For example, the speed of m is increased or decreased per n temperature difference, n may be selected from +/- (0.1k to 0.3k), and m may be selected from 150 rpm to 300 rpm, for example.

The control unit 11 may be based on the set temperature T of the second storage chamber 2_set1Determining the starting temperature of the second storage compartment 2_Tstart2(hereinafter referred to as "second boot temperature_Tstart2"). Wherein, when the temperature of the second storage chamber 1 is higher than the second starting temperature_Tstart2At this time, the control unit 11 confirms that the refrigeration system 3 needs to refrigerate the second storage chamber 2.

When the compressor 4, 4a, 4b is operated and the fluid control unit 7, 7a, 7b turns on the second refrigeration line 32, 32a, 32b, the refrigerant may be supplied to the second evaporator 82, 82a, 82b and the second storage chamber 2 may be cooled. In the embodiment of the present invention, the control unit 11 stops the temperature at the second stop temperature_Tstop2Cooling the second storage chamber 2 as a target temperature of the second storage chamber 2 when the temperature of the second storage chamber 2 is lowered to a second stop temperature_Tstop2When this occurs, the cooling of the second storage chamber 2 is stopped.

When only the second storage compartment 2 has a cooling request, the compressor 4, 4a, 4b may be operated at a predetermined speed or in accordance with a predetermined speed pattern to bring the second storage compartment 2 to a second stop temperature_Tstop2. That is, when the compressor 4, 4a, 4b cools only the second storage chamber 2, the speed of the compressor 4 during operation may not be adjusted in real time based on the temperature of the second storage chamber 2 obtained by the second temperature detecting unit 92.

When both the first storage room 1 and the second storage room 2 have a cooling request, the first storage room 1 and the second storage room 2 may be cooled simultaneously. The first storage chamber 1 and the second storage chamber 2 may be cooled simultaneously by supplying the first evaporators 81, 81a, 81b and the second evaporators 82, 82a, 82b with the refrigerant simultaneously.

In the general systemIn the cold mode, while the compressors 4, 4a, 4b are operated to cool the first storage chamber 1 and the second storage chamber 2 at the same time, the speed of the compressor 4 is adjusted to bring the temperature of the first storage chamber 1 toward the target temperature T of the first storage chamber 1_target1(ii) a And at a second stop temperature_Tstop2Cooling the second storage chamber 2 as a target temperature of the second storage chamber 2 when the temperature of the second storage chamber 2 is lowered to a second stop temperature_Tstop2When this occurs, the cooling of the second storage chamber 2 is stopped. Since the compressor 4, 4a, 4b only needs to refrigerate the second storage chamber 2 for a part of the time, it is more advantageous for the refrigeration system 3, 3a, 3b to match the temperature of the first storage chamber 1 and the speed of the compressor 4, 4a, 4 b.

When the first storage chamber 1 and the second storage chamber 2 are cooled simultaneously in the ordinary cooling mode, the control unit 11 may determine the speed of the compressor 4, 4a, 4b to bring the temperature of the first storage chamber 1 toward the target temperature T of the first storage chamber 1 based on the temperature of the first storage chamber 1 obtained by the first temperature detecting unit 91_target1。

The control unit 11 adjusting the speed of the compressor 4, 4a, 4b in a manner correlated with the temperature of the first storage chamber 1 may include: in the ordinary cooling mode, while simultaneously cooling the first storage chamber 1 and the second storage chamber 2, the temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1 are used_target1The temperature difference therebetween to adjust the speed of the compressor 4, 4a, 4b to bring the temperature of the first storage chamber 1 toward the target temperature T of the first storage chamber 1_target1。

In one embodiment, when the first storage chamber 1 and the second storage chamber 2 are cooled simultaneously in the normal cooling mode, the temperature of the second storage chamber 2 may not be used as a parameter for adjusting the speed of the compressor 4, 4a, 4 b. That is, in cooling the first storage chamber 1 and the second storage chamber 2 simultaneously, the speed of the compressor 4, 4a, 4b is adjusted based on the first storage chamber 1 temperature out of the first storage chamber 1 temperature and the second storage chamber 2 temperature. That is, the control unit 11 adjusts the speed of the compressors 4, 4a, 4b depending on the first storage chamber 1 of the temperature of the first storage chamber 1 and the temperature of the second storage chamber 2 to make the temperature of the first storage chamber 1 approach the target of the first storage chamber 1 regardless of whether the second storage chamber 2 is cooled at the same time or notTemperature T_target1。

Therefore, when the first storage chamber 1 and the second storage chamber 2 are cooled simultaneously in the normal cooling mode, the calculation method of the compressor speed may be the same as that when only the first storage chamber 1 is cooled.

FIG. 7 shows a flow diagram of a method for a refrigeration appliance according to one embodiment of the present invention. As shown in fig. 7, in step S71, the first temperature detection unit 91 detects the temperature of the first storage chamber 1, and the second temperature detection unit 92 detects the temperature of the second storage chamber 2.

In step S72, the control unit 11 determines whether or not the first storage room 1 has a cooling request based on the information of the first temperature detection unit 91.

For example, when the temperature of the first storage chamber 1 reaches the first stop temperature T_stop1When it is determined that the first storage room 1 has no cooling request. When the temperature T1 of the first storage chamber 1 reaches the first start-up temperature T_start1When it is determined that the first storage room 1 has a cooling request.

When the temperature of the first storage chamber 1 is higher than the first stop temperature T_stop1But lower than the first boot temperature T_start1Meanwhile, if the control unit 11 has judged that the first storage room 1 has a cooling request last time, it is determined that the first storage room 1 has a cooling request, and if the control unit 11 has judged that the first storage room 1 has no cooling request last time, it is determined that the first storage room 1 has no cooling request.

If it is determined in step S72 that the first storage room 1 has a cooling request, the compressor 4, 4a, 4b is operated in the first speed mode in step S73. Wherein the first speed mode is a mode in which the speed of the compressor 4 is adjusted according to the temperature of the first storage chamber 1. In particular, the speed of the compressor 4, 4a, 4b can be adjusted in dependence on the temperature of the first storage chamber 1 so that the temperature of the first storage chamber 1 can be at the first start-up temperature T for a long time_start1And a first stop temperature T_stop1Between and towards the target temperature T of the first storage compartment 1_target1For example, the temperature of the first storage chamber 1 is slightly fluctuated to decrease to the first stop temperature T_stop1The probability of (c).

The first and second fans 121 and 122 are operated while both the first and second cooling ducts 31 and 32 are opened to simultaneously cool the first and second storage compartments 1 and 2. The speeds of the first and second fans 121 and 122 are associated with the speed of the compressor 4, and thus with the temperature of the first storage chamber 1.

If it is confirmed in step S72 that the first storage room 1 does not require cooling, it is determined in step S74 whether the second storage room 2 requires cooling.

For example, when the temperature of the second storage chamber 2 reaches the second stop temperature T_stop2It is determined that the second storage chamber 2 has no cooling request. When the temperature of the second storage chamber 2 reaches the second starting temperature T_start2When it is determined that the second storage room 2 has a cooling request.

When the temperature T2 of the second storage chamber 2 is higher than the second stop temperature T_stop2But lower than the second start-up temperature T_start2Meanwhile, if the control unit 11 has judged that the second storage room 2 has a cooling request last time, it is determined that the second storage room 2 has a cooling request, and if the control unit 11 has judged that the second storage room 2 has no cooling request last time, it is determined that the second storage room 2 has no cooling request.

If the second storage room 2 does not require cooling either, the compressors 4, 4a, 4b are not operated or stopped in step S75. If it is judged in step S74 that the second storage chamber 2 requires cooling, the compressor 4, 4a, 4b is operated in the second speed mode in step S76. Wherein the second speed mode is that the speed of the compressor 4, 4a, 4b is determined independently of the temperature of the first storage chamber 1. In the second speed mode, the speed of the compressor 4, 4a, 4b may be fixed or dependent on the set temperature T of the second storage chamber 2_set2Ambient temperature and/or the temperature of the second storage compartment 2.

Fig. 8 is an operation method for a refrigerating apparatus according to another embodiment of the present invention. As shown in fig. 8, in step S91, the first temperature detection unit 91 detects the temperature of the first storage chamber 1, and the second temperature detection unit 92 detects the temperature of the second storage chamber 2.

In step S92, it is determined whether or not the first storage room 1 has a cooling request.

If it is determined in step S92 that the first storage room 1 has a cooling request, it is judged in step S93 whether the second storage room 2 has a cooling request.

If it is confirmed in step S93 that the second storage chamber 2 has no cooling request, the compressor 4, 4a, 4b is operated in the first speed mode. The first speed mode is a mode in which the speed of the compressor 4, 4a, 4b is adjusted according to the temperature of the first storage chamber 1. In particular, the speed of the compressor 4, 4a, 4b can be adjusted in dependence on the temperature of the first storage chamber 1 so that the temperature of the first storage chamber 1 can be at the first start-up temperature T for a long time_start1And a first stop temperature T_stop1And maintains or surrounds the set temperature T of the first storage chamber 1_set1Fluctuating.

If it is confirmed in step S93 that the second storage chamber 2 also requires cooling, the compressor 4, 4a, 4b is operated in the third speed mode. The third speed mode may be a variable or fixed speed increment based on the first speed mode, which is determined according to the temperature of the first storage chamber 1 and is suitable for bringing the temperature of the first storage chamber 1 to the set temperature T of the first storage chamber 1_set1And the calculated compressor speed. The speed increment may be by a predetermined fixed speed value or a variable speed value which is variable depending on the ambient temperature and/or the temperature of the second storage compartment 2. Because the first storage chamber 1 and the second storage chamber 2 are refrigerated simultaneously, the load of the compressors 4, 4a, 4b is increased, and the speed increment is increased on the basis of the first speed mode, so that the second storage chamber 2 is cooled as soon as possible, and the set temperature T of the first storage chamber 1 kept or approached to the first storage chamber 1 is improved_set1The reliability of (2).

If it is confirmed that the first storage room 1 has no cooling request in step S92, it is judged whether the second storage room 2 has a cooling request in step S96. If it is confirmed in step S96 that the second storage chamber 2 has a cooling request, the compressor 4, 4a, 4b is operated in the second speed mode. In the second speed mode, the speed of the compressor 4, 4a, 4b may be fixed or may be set according to the second storage chamber 2Temperature T_set1Ambient temperature and/or the temperature of the second storage compartment 2. The objective of the operation of the compressor 4, 4a, 4b is to cool the second storage chamber 2 to the second stop temperature T_stop2And then stops cooling the second storage chamber 2.

If it is confirmed in step S96 that the second storage room 2 has no cooling request, the compressor 4, 4a, 4b stops operating or remains in a non-operating state.

After step S95, S94, or S96, return to step S91, and so on.

Ideally, the speed of the compressor 4, 4a, 4b and the temperature of the first storage chamber 1 remain substantially constant while the compressor 4, 4a, 4b cools only the first storage chamber 1. However, it should be understood that the temperature of the first storage chamber 1 surrounds the set temperature T of the first storage chamber 1_set1It is also possible that the wave may fluctuate or remain substantially stable after a period of fluctuation.

The speed of the compressor 4, 4a, 4b can be calculated from the currently measured temperature of the first storage chamber 1. This embodiment can adjust the speed of the compressors 4, 4a, 4b in real time with the current temperature of the first storage chamber 1 in a very timely manner, and has a disadvantage in that if the temperature of the first storage chamber 1 suddenly and rapidly fluctuates, the speed of the compressors 4, 4a, 4b rapidly changes, and noise may be generated.

In another embodiment, the speed of the compressor 4, 4a, 4b may be adjusted in real time based on the average temperature of the first storage chamber 1 over a sampling interval. The speed of the compressor 4, 4a, 4b is adjusted using, for example, an average value of the temperatures of the first N (N is greater than or equal to 2) first storage chambers 1 including the current temperature.

Fig. 9 is a schematic diagram illustrating the variation of the speed of the compressor, the temperature of the first storage chamber 1, and the temperature of the second storage chamber 2 according to the method of one embodiment in which the refrigerating apparatus 100 shown in fig. 3 is operated.

The second storage chamber 2 is intermittently cooled in an on-off manner. Specifically, when the temperature of the second storage chamber 2 rises to the second startup temperature T_start2When the second storage chamber 2 is cooled, the second storage chamber 2 reaches the second stop temperature T_stopAt 2, stop coolingBut the second storage chamber 2.

Therefore, the temperature T2 of the second storage chamber is at the second start-up temperature T_start2And a second shutdown temperature T_stop2Fluctuate up and down. In the temperature drop phase, the second storage chamber 2 is cooled by the refrigeration system 3.

At a set temperature T of the first storage chamber 1_set1As the target temperature cools the first storage chamber 1, the compressor 4 can be kept operating for a long time since there is a cooling request from the first storage chamber 1.

In cooling the first storage chamber 1 alone or simultaneously with the first and second storage chambers 1 and 2, the temperature of the first storage chamber 1 is used to adjust the speed of the compressor 4 so that the temperature of the first storage chamber 1 approaches the target temperature of the first storage chamber 1. In this example, the temperature of the first storage chamber 1 fluctuates in a narrower range around the target temperature of the first storage chamber 1 than the fluctuation range of the temperature of the second storage chamber 2.

As shown in fig. 9, since the first storage chamber 1 always has a cooling request, the compressor 4 can be kept operated for a long time.

The average temperature of the first storage chamber 1 during the current time interval is used to adjust the speed of the compressor 4. The speed of the compressor 4 is adjusted by the average temperature of the first storage chamber 1 in the current time interval, and although the speed adjustment of the compressor 4 is delayed, the problem that the speed of the compressor 4 is changed too much and/or frequently to cause noise which makes a user uncomfortable can be avoided.

In the exemplary embodiment, the average temperature of the 20 measured temperatures of the first storage chamber 1 including the current measured temperature is used as the adjustment factor for the speed of the compressor 4.

According to the average temperature of the first storage chamber 1 in the current time interval and the target temperature T of the first storage chamber 1_target1I.e. the set temperature T_set1To determine the speed of the compressor 4.

The speed of the compressor may be controlled by the base speed S0 and according to the average temperature of the first storage chamber 1 during the current time interval and the set temperature T of the first storage chamber 1_set1The sum of the adjusting speeds determined by the temperature difference between. When the temperature difference is larger than zero, the adjusting speed is a positive value, otherwise, the adjusting speed is a negative value.

The base speed S0 may be based on the ambient temperature and the set temperature T of the first storage chamber 1_set1And is determined.

As shown in fig. 9, as the temperature of the first storage chamber 1 increases to the set temperature T of the first storage chamber 1_set1In the above, the speed of the compressor 4 is increased (as in the stages A0-A, B-C, D-E) to make the temperature T1 of the first storage chamber 1 be higher than the set temperature T of the first storage chamber 1_set1The position of (2) is lowered. As the temperature of the first storage chamber 1 decreases to the set temperature T of the first storage chamber 1_set1Below, the speed of the compressor 4 is reduced (as in stages a-B, C-D) to bring the temperature T1 of the first storage chamber 1 from below the set temperature T of the first storage chamber 1_set1Is raised.

The speed increasing stage and the speed decreasing stage of the compressor 4 are alternately performed such that the temperature T1 of the first storage chamber 1 is around the set temperature T_set1The micro-amplitude fluctuates, whereby the compressor 4 is continuously operated.

In the exemplary embodiment, each speed ramp-up phase of compressor 4 (e.g., phases A0-A, B-C, and D-E) includes at least two consecutive speed increase sub-phases.

Each speed-down stage (e.g., periods a-B, periods C-D) of the compressor 4 includes at least two successive speed-down sub-stages.

The speed differences between adjacent speed sub-phases may be equal.

Gradually adjusting the speed of the compressor 4 through a plurality of sub-stages facilitates more accurate adjustment of the speed of the compressor 4, thereby reducing the temperature of the first storage compartment 1 from breaching the first startup temperature T_start1And a first shutdown temperature T_stop1The temperature T1 of the first storage room 1 is made to surround the set temperature T of the first storage room 1_set1Small fluctuations are maintained even at the set temperature T of the first storage chamber 1_set1。

In the above embodiment, the temperature difference between the temperature of the first storage chamber and the target temperature of the first storage chamber is used to adjust the compressionThe speed of the machine. In an alternative embodiment, adjusting the speed of the compressor 4 in association with the temperature of the first storage chamber 1 comprises adjusting the speed of the compressor 4 in accordance with a rate of change of the temperature of the first storage chamber 1. The temperature of the first storage chamber 1 may be made to approach or change at a preset temperature change rate so that the temperature of the first storage chamber 1 approaches the target temperature T of the first storage chamber 1 by judging the comparison between the change rate of the temperature of the first storage chamber 1 and a preset temperature change rate pattern and adjusting the speed of the compressor 4 based on the comparison result_target1。

In the above description, a refrigeration system 3, 3a, 3b having two refrigeration cycles is taken as an example. It should be understood that the present invention should not be limited thereto but may be applied to a refrigerating apparatus having three or more storage compartments/refrigerating cycles.

For example, for a refrigeration system having a three-cycle, the refrigeration system includes a first refrigeration circuit, a second refrigeration circuit, and a third refrigeration circuit connected in parallel at an inlet end, with the outlet end of each refrigeration circuit connected to a respective evaporator to cool a respective storage compartment. Multiple refrigeration cycles may be run simultaneously when there is a refrigeration request. For example, the fluid control unit may open the first refrigeration circuit, the second refrigeration circuit, and the third refrigeration circuit simultaneously. In the starting refrigeration mode, in a first stage, the compressor is operated and one or two of the first refrigeration pipeline, the second refrigeration pipeline and the third refrigeration pipeline are/is conveyed with refrigerant in the same time, and in a second stage after the first stage, the refrigerant is conveyed to the first refrigeration pipeline, the second refrigeration pipeline and the third refrigeration pipeline at the same time.

For example, the first stage may include a first sub-stage in which refrigerant output from the compressor is delivered only to the first refrigeration line, a second sub-stage in which refrigerant is delivered only to the second refrigeration line, and a third sub-stage in which refrigerant is delivered only to the second refrigeration line. These sub-stages may be performed sequentially or alternately.

In another embodiment, the first stage may include a first sub-stage in which refrigerant output from the compressor is delivered only to the first refrigeration line and a second sub-stage in which refrigerant output from the compressor is delivered only to the second refrigeration line and the third refrigeration line. These sub-stages may be performed sequentially or alternately.

In the above embodiment, one refrigeration cycle/evaporator corresponds to one storage chamber. It should be understood that the invention should not be limited to this first place. For example, it is also possible that at least one refrigeration cycle cools two or more storage compartments simultaneously.

Although the refrigeration device and method for the refrigeration device have been described above with reference to the accompanying drawings based on specific shapes and orientations, those skilled in the art will appreciate that variations may be made without departing from the principles and spirit of the disclosure. In other words, although exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.