阅读说明：本技术 用于制冷设备的风机控制电路、方法及冷藏密闭柜 (Fan control circuit and method for refrigeration equipment and refrigeration closed cabinet ) 是由 关焕豪 苗志强 肖勇 么宇 于 2021-07-19 设计创作，主要内容包括：本申请涉及一种用于制冷设备的风机控制电路、方法及冷藏密闭柜,用于制冷设备的风机控制电路包括至少一个接近开关、至少两条风机转速控制支路和风机,至少两条风机转速控制支路与风机连接,至少一个接近开关用于向外部控制器发送开关信号,各条风机转速控制支路控制风机转速不同,且各条风机转速控制电路根据外部控制器发送的控制指令进行通断控制。本申请采用接近开关检测柜门开关状态,针对柜门开关状态控制对应风机转速控制电路导通,实现风机运行策略地实时调节,避免柜门打开时大量热风卷入柜内,也避免出现冷风吹人、风噪太大等情况,提升使用者的体验。(The application relates to a fan control circuit and method for refrigeration equipment and a refrigeration closed cabinet, wherein the fan control circuit for the refrigeration equipment comprises at least one proximity switch, at least two fan rotating speed control branches and a fan, the at least two fan rotating speed control branches are connected with the fan, the at least one proximity switch is used for sending a switch signal to an external controller, the rotating speeds of the fans controlled by the fan rotating speed control branches are different, and the fan rotating speed control circuits carry out on-off control according to a control instruction sent by the external controller. This application adopts proximity switch to detect cabinet door on-off state, corresponds fan rotational speed control circuit to cabinet door on-off state control and switches on, realizes that fan operation tactics adjusts in real time, in avoiding a large amount of hot-blastly being drawn into the cabinet when the cabinet door is opened, also avoid appearing the cold wind and blow people, the wind noise condition such as too big, promote user's experience.)

1. A fan control circuit for a refrigeration appliance, comprising:

the system comprises at least one proximity switch, at least two fan rotating speed control branches and a fan;

the at least two fan rotating speed control branches are connected with the fan;

the at least one proximity switch is used for sending a switch signal to an external controller;

the fan rotating speed control branches control different fan rotating speeds, and each fan rotating speed control circuit performs on-off control according to a control instruction sent by the external controller.

2. The fan control circuit for a refrigeration unit of claim 1, wherein each fan speed control branch comprises:

the relay, or, the relay and the speed limiting resistor;

the relay is used for receiving a control instruction sent by the external controller and controlling the corresponding fan rotating speed control branch to be conducted according to the control instruction so as to enable the fan to work at a corresponding rotating speed.

3. The fan control circuit for a refrigeration unit of claim 1, wherein when the at least one proximity switch is a plurality of proximity switches, the plurality of proximity switches are connected in series.

4. The fan control circuit for a refrigeration unit of claim 3, further comprising:

a protection resistor connected in series with the at least one proximity switch.

5. The fan control circuit for a refrigeration unit of claim 1, wherein said at least two fan speed control branches comprise a first fan speed control branch and a second fan speed control branch;

the first fan rotating speed control branch comprises a first relay, the second fan rotating speed control branch comprises a second relay and a speed limiting resistor, and the speed limiting resistor is used for dividing voltage with the fan;

if the first relay is disconnected and the second relay is disconnected, the first fan rotating speed control branch and the second fan rotating speed control branch are not conducted, and the fan stops running;

if the first relay is closed and the second relay is disconnected, the first fan rotating speed control branch is switched on, and the fan runs in a high-grade mode;

and if the first relay is disconnected and the second relay is closed, the rotating speed control branch of the second fan is switched on, and the fan runs at a low gear.

6. The fan control circuit for a refrigeration appliance according to claim 5, further comprising:

and the buzzer is connected with the second relay.

7. The fan control circuit for a refrigeration appliance according to claim 1, further comprising:

and the refrigeration switch is connected with the power supply and used for controlling the conduction of the fan control circuit for the refrigeration equipment when refrigeration is started.

8. The fan control circuit for a refrigeration device according to any one of claims 1 to 7, wherein the fan is a cross-flow fan.

9. A refrigerated enclosure, comprising:

the refrigerator comprises a cabinet body, a fan control circuit and a controller which are arranged in the cabinet body and used for refrigeration equipment according to any one of claims 1 to 8;

the fan control circuit for the refrigeration equipment is connected with the controller.

10. A refrigerated enclosure as recited in claim 9 further comprising:

a cabinet door rotatably connected with the cabinet body;

the number of at least one proximity switch in the fan control circuit for the refrigeration equipment is the same as that of the cabinet doors;

the at least one proximity switch is arranged on the cabinet body close to the cabinet door and generates a switch signal according to the opening and closing of the cabinet door;

the controller is used for generating a control instruction according to the switching signal.

11. A refrigerated enclosure as claimed in claim 9 wherein the fan is a cross flow fan comprising:

the fan comprises a first cross flow fan blade, a second cross flow fan blade and a motor;

the hollow shaft of the first cross flow fan blade is connected with the solid shaft of the second cross flow fan blade, and the hollow shaft of the second cross flow fan blade is connected with the motor.

12. A refrigerated enclosure as claimed at claim 11 wherein the first and/or second cross flow fan has a diameter of 85 mm.

13. A refrigerated enclosure as claimed in claim 11 or 12 wherein the cross flow fan further comprises:

the vortex tongue and the volute are arranged with a protective gap between the first cross flow fan blade and the second cross flow fan blade.

14. A refrigerated enclosure as claimed at claim 13 wherein the protective gap is in the range 2 to 8 mm.

15. A refrigerated enclosure as recited in claim 9 further comprising:

the evaporator assembly of long flat structure, the evaporator assembly of long flat structure sets up the internal top of cabinet.

16. A refrigerated enclosure as recited in claim 15 further comprising:

the grid assembly comprises a cover plate, an air outlet grid and a return air grid, the cover plate is used for covering the fan and the evaporator assembly, the fan and the evaporator assembly pass through the air outlet grid to supply air to the cabinet body, and the return air grid returns air.

17. A refrigerated enclosure as recited in claim 15 further comprising:

and the water pan assembly is arranged below the evaporator assembly of the long flat structure.

18. A fan control method for a refrigeration device, comprising:

detecting whether the proximity switch generates a switching signal according to a preset frequency;

if so, calculating the door opening duration according to the switch signal generation time;

and controlling the corresponding fan rotating speed control branch circuit to be conducted according to the door opening duration so as to enable the fan to work at the corresponding rotating speed.

19. The fan control method for a refrigeration unit of claim 18, wherein the fan speed control branch comprises a first fan speed control branch and a second fan speed control branch;

the first fan rotating speed control branch comprises a first relay, the second fan rotating speed control branch comprises a second relay and a speed limiting resistor, and the speed limiting resistor is used for dividing voltage with the fan;

the corresponding fan rotational speed control branch road switches on according to the duration control of opening the door to make the fan work with corresponding rotational speed, includes:

if a switching signal is generated or the door opening duration is equal to 0, controlling the first relay to be closed and the second relay to be disconnected, enabling the first fan rotating speed control branch to be connected, and enabling the fan to operate at a high grade;

if the door opening duration is not equal to 0 and is less than the preset door opening limit duration, controlling the first relay to be switched off and the second relay to be switched off, and stopping the fan when the first fan rotating speed control branch and the second fan rotating speed control branch are not switched on;

if the door opening duration time is longer than or equal to the preset door opening limiting time length, the first relay is controlled to be switched off, the second relay is controlled to be switched on, the second fan rotating speed control branch is switched on, and the fan runs at a low gear.

20. The fan control method for a refrigeration appliance according to claim 19, further comprising:

and triggering a buzzer to alarm when the door opening duration is longer than or equal to the preset opening threshold for a fixed time.

21. The fan control method for the refrigeration equipment as recited in claim 19 or 20, wherein the preset door opening limited time is within a range of 3-5 min.

22. The fan control method for the refrigeration equipment as recited in claim 21, wherein the preset frequency is in a range of 10-20 s.

Technical Field

The application belongs to the technical field of refrigeration closed cabinets, and particularly relates to a fan control circuit and method for refrigeration equipment and a refrigeration closed cabinet.

Background

The refrigeration closed cabinet is mainly arranged in shops, supermarkets, convenience stores and the like and is used for refrigerating and selling beverages. Traditional cold-stored airtight cabinet keeps the air supply mode under the condition that the power was opened always, and the air supply volume is unchangeable for when the cabinet door need be opened in cleanness, replenishment, purchase drink etc. because the fan still normally supplies air, cause in a large amount of hot-blast being drawn into the cabinet, drink temperature in the cabinet lasts and risees, the energy consumption increase, can appear cold wind blowing people moreover, the too big condition of wind noise, influence user's experience.

Disclosure of Invention

For overcoming traditional airtight freezer cabinet door switching different use scenes at least to a certain extent and keeping unchanged air supply strategy, the energy consumption increase appears when the cabinet door is opened, and the cold wind blows people, influences the problem that the user experienced, and this application provides a fan control circuit, method and airtight freezer that are used for refrigeration plant.

In a first aspect, the present application provides a fan control circuit for a refrigeration appliance, comprising:

the system comprises at least one proximity switch, at least two fan rotating speed control branches and a fan;

the at least two fan rotating speed control branches are connected with the fan;

the at least one proximity switch is used for sending a switch signal to an external controller;

the fan rotating speed control branches control different fan rotating speeds, and each fan rotating speed control circuit performs on-off control according to a control instruction sent by the external controller.

Further, every fan rotational speed control branch road includes:

the relay, or, the relay and the speed limiting resistor;

the relay is used for receiving a control instruction sent by the external controller and controlling the corresponding fan rotating speed control branch to be conducted according to the control instruction so as to enable the fan to work at a corresponding rotating speed.

Further, when the at least one proximity switch is a plurality of proximity switches, the plurality of proximity switches are connected in series.

Further, the method also comprises the following steps:

and the protection resistor is connected with the at least one proximity switch in series and used for preventing a fan control circuit for the refrigeration equipment from generating a short circuit phenomenon.

Further, the at least two fan rotating speed control branches comprise a first fan rotating speed control branch and a second fan rotating speed control branch;

the first fan rotating speed control branch comprises a first relay, the second fan rotating speed control branch comprises a second relay and a speed limiting resistor, and the speed limiting resistor is used for dividing voltage with the fan;

if the first relay is disconnected and the second relay is disconnected, the first fan rotating speed control branch and the second fan rotating speed control branch are not conducted, and the fan stops running;

if the first relay is closed and the second relay is disconnected, the first fan rotating speed control branch is switched on, and the fan runs in a high-grade mode;

and if the first relay is disconnected and the second relay is closed, the rotating speed control branch of the second fan is switched on, and the fan runs at a low gear.

Further, the method also comprises the following steps:

and the buzzer is connected with the second relay.

Further, the method also comprises the following steps:

and the refrigeration switch is connected with the power supply and used for controlling whether a fan control circuit for the refrigeration equipment is communicated or not.

Further, the fan is a cross-flow fan.

In a second aspect, the present application provides a refrigerated enclosure comprising:

the refrigerator comprises a cabinet body, a fan control circuit and a controller, wherein the fan control circuit and the controller are arranged in the cabinet body and used for refrigeration equipment;

the fan control circuit for the refrigeration equipment is connected with the controller.

Further, the method also comprises the following steps:

a cabinet door rotatably connected with the cabinet body;

the number of at least one proximity switch in the fan control circuit for the refrigeration equipment is the same as that of the cabinet doors;

the at least one proximity switch is arranged on the cabinet body close to the cabinet door and generates a switch signal according to the opening and closing of the cabinet door;

the controller is used for generating a control instruction according to the switching signal.

Further, the fan is a cross-flow fan, and the cross-flow fan includes:

the fan comprises a first cross flow fan blade, a second cross flow fan blade and a motor;

the hollow shaft of the first cross flow fan blade is connected with the solid shaft of the second cross flow fan blade, and the hollow shaft of the second cross flow fan blade is connected with the motor.

Further, the diameter of the first cross flow fan blade and/or the second cross flow fan blade is 85 mm.

Further, the crossflow blower further comprises:

the vortex tongue and the volute are arranged with a protective gap between the first cross flow fan blade and the second cross flow fan blade.

Furthermore, the range of the protection gap is 2-8 mm.

Further, the method also comprises the following steps:

the evaporator assembly of long flat structure, the evaporator assembly of long flat structure sets up the internal top of cabinet.

Further, the method also comprises the following steps:

the grid assembly comprises a cover plate, an air outlet grid and a return air grid, and the grid assembly is used for covering the fan and the evaporator assembly so that the fan and the evaporator assembly can pass through the air outlet grid to supply air to the cabinet body, and the return air grid returns air.

Further, the method also comprises the following steps:

and the water pan assembly is arranged below the evaporator assembly of the long flat structure.

In a third aspect, the present application provides a fan control method for a refrigeration device, including:

detecting whether the proximity switch generates a switching signal according to a preset frequency;

if so, calculating the door opening duration according to the switch signal generation time;

and controlling the corresponding fan rotating speed control branch circuit to be conducted according to the door opening duration so as to enable the fan to work at the corresponding rotating speed.

Further, the fan rotating speed control branch comprises a first fan rotating speed control branch and a second fan rotating speed control branch;

the first fan rotating speed control branch comprises a first relay, the second fan rotating speed control branch comprises a second relay and a speed limiting resistor, and the speed limiting resistor is used for dividing voltage with the fan;

the corresponding fan rotational speed control branch road switches on according to the duration control of opening the door to make the fan work with corresponding rotational speed, includes:

if a switching signal is generated or the door opening duration is equal to 0, controlling the first relay to be closed and the second relay to be disconnected, enabling the first fan rotating speed control branch to be connected, and enabling the fan to operate at a high grade;

if the door opening duration is not equal to 0 and is less than the preset door opening limit duration, controlling the first relay to be switched off and the second relay to be switched off, and stopping the fan when the first fan rotating speed control branch and the second fan rotating speed control branch are not switched on;

if the door opening duration time is longer than or equal to the preset door opening limiting time length, the first relay is controlled to be switched off, the second relay is controlled to be switched on, the second fan rotating speed control branch is switched on, and the fan runs at a low gear.

Further, the method also comprises the following steps:

and triggering a buzzer to alarm when the door opening duration is longer than or equal to the preset opening threshold for a fixed time.

Further, the preset door opening limiting time is within the range of 3-5 min.

Further, the preset frequency is within a range of 10-20 s.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the embodiment of the invention provides a fan control circuit and method for refrigeration equipment and a refrigeration closed cabinet, the fan control circuit for the refrigeration equipment comprises at least one proximity switch, at least two fan rotating speed control branches and a fan, wherein the at least two fan rotating speed control branches are connected with the fan, the at least one proximity switch is used for sending a switching signal to an external controller, the fan rotating speed control branches control the fan rotating speeds to be different, and each fan rotational speed control circuit carries out on-off control according to the control command that external control ware sent, and this application adopts proximity switch to detect cabinet door on-off state, and to cabinet door on-off state control corresponding fan rotational speed control circuit switch on, realize that the fan operation tactics adjusts in real time, avoids in a large amount of hot-blasts are drawn into the cabinet when the cabinet door is opened, also avoids appearing the cold wind and blows people, the too big circumstances of wind noise etc. promotes user's experience.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a functional block diagram of a fan control circuit for a refrigeration device according to an embodiment of the present disclosure.

Fig. 2 is a circuit diagram of a fan control circuit for a refrigeration device according to an embodiment of the present application.

Fig. 3 is a functional structure diagram of a refrigeration enclosure according to an embodiment of the present application.

Figure 4 is a schematic structural view of a refrigerated enclosure according to an embodiment of the present application.

Figure 5 is a schematic view of another embodiment of a refrigerated enclosure according to the present application.

Figure 6 is a schematic view of another alternative embodiment of a refrigerated enclosure provided in accordance with an embodiment of the present application.

FIG. 7 is a schematic illustration of a crossflow blower according to an embodiment of the present application.

Fig. 8 is a flowchart of a fan control method for a refrigeration device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a functional block diagram of a fan control circuit for a refrigeration apparatus according to an embodiment of the present application, and as shown in fig. 1, the fan control circuit for a refrigeration apparatus includes:

the system comprises at least one proximity switch 1, at least two fan rotating speed control branches 2 and a fan 3;

the at least two fan rotating speed control branches 2 are connected with the fan 3;

at least one proximity switch 1 for sending a switching signal to an external controller;

the rotating speed of each fan rotating speed control branch 2 controls the rotating speed of the fan 3 to be different, and each fan rotating speed control circuit 2 carries out on-off control according to a control instruction sent by an external controller.

Traditional cold-stored airtight cabinet keeps the air supply mode under the condition that the power was opened always, and the air supply volume is unchangeable for when cabinet door is opened in cleanness, replenishment, purchase drink, because axial fan still normally supplies air, cause in a large amount of hot-blast being drawn into the cabinet, drink temperature in the cabinet lasts and rises, the energy consumption increase, can appear cold wind blowing people moreover, the too big circumstances of wind noise, influence user's experience.

In this embodiment, a fan control circuit for refrigeration plant sets up in the airtight cabinet that refrigerates, includes: at least one proximity switch, at least two fan speed control branch roads and fan, at least two fan speed control branch roads are connected with the fan, at least one proximity switch is used for sending switching signal to external control ware, each fan speed control branch road control fan rotational speed is different, and each fan speed control circuit carries out on-off control according to the control command that external control ware sent, owing to adopt proximity switch to detect cabinet door on-off state, it switches on to the corresponding fan speed control circuit of cabinet door on-off state control, can realize that the fan operation tactics is real-time to be adjusted, avoid when the cabinet door is opened a large amount of hot-blasts to be drawn into in the cabinet, also avoid appearing the cold wind and blow people, the too big circumstances of wind noise, promote user's experience.

An embodiment of the present invention provides a fan control circuit for a refrigeration device, as shown in a circuit diagram in fig. 2, the fan control circuit for a refrigeration device includes:

three proximity switches and two fan rotating speed control branches;

the two fan rotating speed control branches are connected with the fans in series;

the two fan rotating speed control branches comprise a first fan rotating speed control branch and a second fan rotating speed control branch;

the first fan rotating speed control branch comprises a first relay, the second fan rotating speed control branch comprises a second relay and a speed limiting resistor, and the speed limiting resistor is used for dividing voltage with the fan, so that when the second fan rotating speed control branch is conducted, the voltage obtained by the fan is reduced, and the fan runs at a low gear;

it should be noted that the fan rotation speed control branch may include a plurality of speed limiting resistors, and the resistance values of the speed limiting resistors on each fan rotation speed control branch are the same or different, and the adjustment of a plurality of rotation speed gears of the fan may be realized through the speed limiting resistors with different resistance values.

If the first relay is disconnected and the second relay is disconnected, the first fan rotating speed control branch and the second fan rotating speed control branch are not conducted, and the fan stops running;

if the first relay is closed and the second relay is disconnected, the rotating speed control branch of the first fan is switched on, and the fan runs in a high-grade mode;

if the first relay is disconnected and the second relay is closed, the rotating speed control branch of the second fan is switched on, and the fan runs at a low gear.

Further comprising:

and the refrigeration switch is connected with the power supply and used for controlling whether a fan control circuit for the refrigeration equipment is switched on or not. When the refrigeration switch is switched off, the fan control circuit for the refrigeration equipment is in an open circuit state, the refrigeration switch is closed, the refrigeration closed cabinet enters a refrigeration mode, and the fan control circuit is switched on.

And the protection resistor is connected with the at least one proximity switch in series and used for protecting a fan control circuit for the refrigeration equipment from short circuit.

And the buzzer is connected with the second relay in series.

In some embodiments, the fan is a cross-flow fan, and the cross-flow fan is used for supplying air, so that the temperature in the refrigeration closed cabinet can be more uniform.

In this embodiment, correspond fan control branch road through the fan control circuit who is used for refrigeration plant according to switching signal control and switch on and carry out work with this fan control branch road correspondence rotational speed with the control fan, can realize adjusting fan operation strategy, in avoiding a large amount of hot-blastly being drawn into the cabinet when the cabinet door is opened, also avoid appearing the cold wind and blow people, the wind noise condition such as too big, promote user's experience.

Fig. 3 is a functional block diagram of a refrigeration enclosure according to an embodiment of the present application, as shown in fig. 3, the refrigeration enclosure includes:

the refrigerator comprises a cabinet body 1, and a fan control circuit 2 and a controller 3 which are arranged in the cabinet body 1 and used for refrigeration equipment according to the embodiment;

the fan control circuit 2 for the refrigeration equipment is connected with the controller 3.

The cabinet door is rotatably connected with the cabinet body and comprises a cabinet door 4;

at least one proximity switch in the fan control circuit 2 for the refrigeration equipment is arranged on the cabinet body 1 close to the cabinet door 4, and generates a switch signal according to the opening and closing of the cabinet door 4;

the controller 3 generates a control instruction according to the switching signal, so that each fan rotating speed control circuit in the fan control circuit 2 for the refrigeration equipment carries out on-off control according to the control instruction.

Traditional cold-stored airtight cabinet keeps the air supply mode under the condition that the power was opened always, and the air supply volume is unchangeable for when cabinet door is opened in cleanness, replenishment, purchase drink, because axial fan still normally supplies air, cause in a large amount of hot-blast being drawn into the cabinet, drink temperature in the cabinet lasts and rises, the energy consumption increase, can appear cold wind blowing people moreover, the too big circumstances of wind noise, influence user's experience.

In the embodiment, the closed refrigeration cabinet comprises a cabinet body, and a fan control circuit and a controller which are arranged in the cabinet body and used for refrigeration equipment, wherein the fan control circuit used for the refrigeration equipment is connected with the controller, the closed refrigeration cabinet also comprises a cabinet door which is rotatably connected with the cabinet body, at least one proximity switch in the fan control circuit used for the refrigeration equipment is arranged on the cabinet body and close to the cabinet door, a switch signal is generated according to the opening and closing of the cabinet door, the controller generates a control instruction according to the switch signal, so that the fan rotating speed control circuits in the fan control circuit used for the refrigeration equipment are controlled to be on and off according to the control instruction, in the embodiment, the proximity switch is adopted to detect the opening and closing state of the cabinet door, the opening and closing of at least two relays are controlled according to the opening and closing state of the cabinet door to control the working state of a cross-flow fan, the operation strategy adjustment of the fan is realized, and a large amount of hot air is prevented from being involved in the cabinet when the cabinet door is opened, the situations that cold air blows people, wind noise is too large and the like are avoided, and the experience of a user is improved.

An embodiment of the present invention provides another refrigeration enclosure, as shown in fig. 4 to 6, and as shown in fig. 4, the refrigeration enclosure includes:

the cabinet body 1, the cabinet body 1 is for example the foaming box, is equipped with at least one proximity switch 3 in cabinet body 1 top door frame department, and the door axle head is kept away from to proximity switch mounted position to the low-angle is opened the door and also can be normally judged the door switch state, and proximity switch quantity is the same with cabinet door quantity, as shown in fig. 4, and cold-stored airtight cabinet is three components of a whole that can function independently vertical cabinet, and consequently proximity switch quantity is 3, sets up in every cabinet door top. When the cabinet door is opened, the proximity switch generates a switch signal.

Grid assembly 2, including air-out grid 9 and return air grid 11, as shown in fig. 5, grid assembly 2 is used for covering cross-flow fan and evaporimeter subassembly, makes the 1 outward appearance of the cabinet body more level and more smooth, pleasing to the eye to, after setting up air-out grid 9 and return air grid 11, cross-flow fan and evaporimeter subassembly can be through air-out grid 9 to the internal air supply of cabinet, carry out the return air through return air grid 11.

As shown in fig. 6, the top of the refrigeration closed cabinet is provided with a cross flow fan, as shown in fig. 7, the cross flow fan comprises:

the volute component 4 comprises a volute tongue 41 and a volute 42, an air outlet included angle 43 between the volute tongue 41 and the volute 42 is 22 +/-5 degrees, and a protective gap 44 is arranged between the volute tongue 41 and the volute 42 and between the first cross flow fan blade 5 and the second cross flow fan blade 5.

In some embodiments, the protective gap 44 between the volute tongue 41 and the volute 42 and the first and second cross-flow blades 5 and 5 is in the range of 2-8 mm. It should be noted that a small protection gap 44 is provided between the volute tongue 41 and the volute 42 and between the first cross flow fan blade 5 and the second cross flow fan blade 5, so as to increase the air volume, and the protection gap 44 can reduce the noise, so that the user can adjust the protection gap according to the actual requirement.

The cross-flow fan blade 5 comprises a first cross-flow fan blade and a second cross-flow fan blade, and the diameter of the first cross-flow fan blade and/or the second cross-flow fan blade is 85 mm.

The hollow shaft of the first cross flow fan blade is connected with the solid shaft of the second cross flow fan blade, and the hollow shaft of the second cross flow fan blade is connected with the motor 10.

Adopt axial fan air supply, lead to when closing the door operation, cold volume is concentrated in the middle part in the cabinet, and the inside both sides of cabinet is great with the middle part difference in temperature. The cross-flow fan is adopted, and air supply can be more uniform.

In the embodiment, one motor drives the two cross-flow fan blades to rotate, so that the motor cost can be saved. Moreover, the length of the cross-flow fan blade can be freely adjusted according to the size of the cabinet and the load, so that the temperature in the cabinet is more uniform.

The evaporator assembly 6 of long flat structure, the evaporator assembly 6 of long flat structure sets up at cabinet body 1 internal top.

In the cold-stored airtight cabinet of tradition, the evaporimeter subassembly sets up top intermediate position in the cabinet, and evaporimeter component structure is the great cuboid structure of thickness, and consequently, occupation space is great, has reduced the cabinet internal volume, and in this embodiment, the evaporimeter subassembly carries out long flat shape design along cross-flow fan inlet scoop size, because length increases, can make the height-reducing to promote cabinet internal volume utilization ratio.

The water receiving tray assembly 7 is arranged below the evaporator assembly 6 with the long flat structure, and is used for receiving condensed water generated by the evaporator and avoiding the cabinet body from being damaged by the condensed water.

In the embodiment, the cross-flow fan with the two cross-flow fan blades is used for replacing the traditional axial flow fan, so that the temperature in the cabinet is more uniform, the cross-flow fan and the evaporator assembly are arranged at the top of the cabinet body, the volume ratio of the cabinet body can be increased, and an independent air channel is not needed.

An embodiment of the present invention provides a fan control method for a refrigeration apparatus, as shown in a flowchart in fig. 8, the fan control method for a refrigeration apparatus includes:

s81: detecting whether the proximity switch generates a switching signal according to a preset frequency;

in some embodiments, the predetermined frequency is within a range of 10-20 s.

S82: if so, calculating the door opening duration according to the switch signal generation time;

s83: and controlling the corresponding fan rotating speed control branch circuit to be conducted according to the door opening duration so as to enable the fan to work at the corresponding rotating speed.

The fan rotating speed control branch comprises a first fan rotating speed control branch and a second fan rotating speed control branch;

the first fan rotating speed control branch comprises a first relay, the second fan rotating speed control branch comprises a second relay and a speed limiting resistor, and the speed limiting resistor is used for dividing voltage with the fan;

the corresponding fan rotational speed control branch road switches on according to the duration control of opening the door to make the fan work with the rotational speed that corresponds, include:

if no switching signal is generated or a switching signal is generated or the door opening duration is equal to 0, the first relay is controlled to be closed and the second relay is controlled to be disconnected, the first fan rotating speed control branch is switched on, and the fan runs at a high grade, so that the refrigeration effect of the equipment is ensured;

if the door opening duration is not equal to 0 and is less than the preset door opening limit duration, the first relay is controlled to be switched off and the second relay is switched off, the first fan rotating speed control branch circuit and the second fan rotating speed control branch circuit are not conducted, the fan stops running, the external hot air winding amount during temporary door opening is reduced, the energy consumption of equipment is reduced, cold air blowing is prevented, and the user experience is improved;

if duration time more than or equal to of opening the door predetermines to open the door and prescribes a limit to be long, control first relay disconnection just the second relay is closed, second fan rotational speed control branch road switches on, and the fan uses the low-grade operation, for the internal portion of cabinet in time supply cold volume, prevents that the cabinet door is opened the condition for a long time cold volume not enough.

In some embodiments, further comprising:

when the door opening duration is longer than or equal to the preset opening threshold timing length, a buzzer is triggered to give an alarm, and a user is reminded of the fact that the door opening duration is too long or the abnormality needs to be processed in time.

In some embodiments, the preset door opening limit time is within a range of 3-5 min.

In the embodiment, the fan runs in a high-grade mode in a door closing state, so that the refrigeration effect is ensured; when the door is opened within the accumulated time, the fan stops running, so that cold air and hot air are prevented from being involved, energy is saved, and noise is reduced; when opening the door, long being greater than the accumulative total time, the fan low-grade operation supplements cold volume, and synchronous bee calling organ reports to the police, reminds the user in time to handle and realizes intelligent air supply, has solved under traditional cold-stored airtight cabinet state of opening the door, and hot-blast being drawn into the performance problem and the cold wind that make the drink temperature rise, energy consumption grow that the cold wind blows people, the too big influence user experience problem of wind noise.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

It should be noted that the present invention is not limited to the above-mentioned preferred embodiments, and those skilled in the art can obtain other products in various forms without departing from the spirit of the present invention, but any changes in shape or structure can be made within the scope of the present invention with the same or similar technical solutions as those of the present invention.