阅读说明：本技术 一种热泵机组 (Heat pump set ) 是由 姜春辉 于 2021-08-02 设计创作，主要内容包括：本发明提供了一种热泵机组,热泵机组包括主循环系统和辅助系统,主循环系统包括形成主循环回路的主压缩机、主四通阀、室外换热器、主节流元件和室内换热器,辅助系统包括第一副换热器,第一副换热器用于产生与室外换热器相反的能量并将能量施加至室外换热器或者与所述室外换热器相接的冷媒管路上,因而,本发明通过第一副换热器可以提高室内换热器的制冷制热效率,提升用户舒适度。(The invention provides a heat pump unit, which comprises a main circulation system and an auxiliary system, wherein the main circulation system comprises a main compressor, a main four-way valve, an outdoor heat exchanger, a main throttling element and an indoor heat exchanger which form a main circulation loop, the auxiliary system comprises a first auxiliary heat exchanger, and the first auxiliary heat exchanger is used for generating energy opposite to that of the outdoor heat exchanger and applying the energy to the outdoor heat exchanger or a refrigerant pipeline connected with the outdoor heat exchanger.)

1. The heat pump unit comprises a main circulation system, wherein the main circulation system comprises a main compressor (1), a main four-way valve (20), an outdoor heat exchanger (2), a liquid storage device (6), a main throttling element (5) and an indoor heat exchanger (3) which form a main circulation loop, and is characterized by comprising an auxiliary system, wherein the auxiliary system comprises a first auxiliary heat exchanger (9), and the first auxiliary heat exchanger (9) is used for generating energy opposite to that of the outdoor heat exchanger (2) and applying the energy to the outdoor heat exchanger (2) or a refrigerant pipeline connected with the outdoor heat exchanger (2).

2. A heat pump unit according to claim 1, wherein the heat exchanger fins of the first secondary heat exchanger (9) are in contact with the heat exchanger fins of the outdoor heat exchanger (2), or the refrigerant pipelines of the first secondary heat exchanger (9) share heat exchange fins with the refrigerant pipelines of the outdoor heat exchanger (2), or at least part of the refrigerant pipelines of the first secondary heat exchanger (9) are located in the refrigerant pipelines of the outdoor heat exchanger (2), or at least part of the refrigerant pipelines of the outdoor heat exchanger (2) are located in the refrigerant pipelines of the first secondary heat exchanger (9).

3. A heat pump unit according to claim 1, characterised in that the auxiliary system comprises a differential temperature heat exchanger (17), and the first secondary heat exchanger (9) and the refrigerant line connected to the outdoor heat exchanger (2) are located in the differential temperature heat exchanger (17).

4. A heat pump unit according to claim 3, wherein the refrigerant pipeline of the first secondary heat exchanger (9) and the refrigerant pipeline connected with the outdoor heat exchanger (2) are spirally arranged in the thermoelectric heat exchanger (17), or at least part of the refrigerant pipeline of the first secondary heat exchanger (9) is positioned in the refrigerant pipeline connected with the outdoor heat exchanger (2), or at least part of the refrigerant pipeline connected with the outdoor heat exchanger (2) is positioned in the refrigerant pipeline of the first secondary heat exchanger (9).

5. Heat pump unit according to any one of claims 1 to 4, characterised in that the auxiliary system comprises a secondary compressor (7), a valve unit, a second secondary heat exchanger (8), a secondary throttle element (10) and a first secondary heat exchanger (9) forming a secondary circuit.

6. A heat pump unit according to claim 5, characterised in that the auxiliary system comprises a third secondary heat exchanger (12) and a solar collector (13), the solar collector (13) is adapted to transfer the generated heat to the third secondary heat exchanger (12), and the valve unit is adapted to connect the third secondary heat exchanger (12) between the return air opening of the secondary compressor (1) and the second secondary heat exchanger (8) when the temperature of the solar collector (13) is above a certain temperature and the first secondary heat exchanger (9) is in a heating state.

7. A heat pump unit according to claim 5, characterised in that the auxiliary system comprises a fourth secondary heat exchanger (15) and a liquid storage device (14), the fourth secondary heat exchanger (15) being adapted to exchange heat with the liquid storage device (14); the valve unit is used for connecting the fourth auxiliary heat exchanger (15) between the exhaust port of the auxiliary compressor (7) and the second auxiliary heat exchanger (8) when the temperature of the liquid storage device (14) is lower than a specific temperature and the first auxiliary heat exchanger (9) is in a refrigerating state, and/or the valve unit is used for connecting the fourth auxiliary heat exchanger (15) between the exhaust port of the auxiliary compressor (7) and the first auxiliary heat exchanger (9) when the temperature of the liquid storage device (14) is higher than a self-set temperature and the first auxiliary heat exchanger (9) is in a heating state.

8. A heat pump unit according to claim 5, characterised in that the auxiliary system comprises a third secondary heat exchanger (12) and a solar collector (13), the solar collector (13) being adapted to transfer generated heat to the third secondary heat exchanger (12); -the auxiliary system comprises a fourth secondary heat exchanger (15) and a liquid storage device (14), the fourth secondary heat exchanger (15) being adapted to transfer heat to the liquid storage device (14); the valve unit is used for connecting the fourth auxiliary heat exchanger (15) between an exhaust port of the auxiliary compressor (7) and the first auxiliary heat exchanger (9) when the temperature of the liquid storage device (14) is higher than the self-set temperature and the first auxiliary heat exchanger (9) is in a heating state; and/or the valve unit is used for connecting the fourth secondary heat exchanger (15) between the exhaust port of the secondary compressor (7) and the first secondary heat exchanger (9) when the temperature of the liquid storage device (14) is lower than a second specific temperature, the temperature of the solar heat collector (13) is lower than a specific temperature and the first secondary heat exchanger (9) is in a heating state; and/or the valve unit is used for connecting the fourth secondary heat exchanger (15) between the exhaust port of the secondary compressor (7) and the first secondary heat exchanger (9) and connecting the third secondary heat exchanger (12) between the second secondary heat exchanger (8) and the return port of the secondary compressor (7) when the temperature of the liquid storage device (14) is lower than a second specific temperature, the temperature of the solar heat collector (13) is higher than a specific temperature and the first secondary heat exchanger (9) is in a heating state.

9. A heat pump set according to claim 8, characterized in that a second secondary throttling element (18) is arranged between the third secondary heat exchanger (12) and the fourth secondary heat exchanger (15), and the valve unit is used for switching to a state that the secondary compressor (7), the fourth secondary heat exchanger (15), the second secondary throttling element (18) and the third secondary heat exchanger (15) form a circulation loop when the primary compressor (1) is stopped and the temperature of the liquid storage device (14) is lower than a self-set temperature.

10. A heat pump unit according to claim 7 or 8 or 9, characterised in that the reservoir (14) comprises a line and pump (16), the line and pump (16) being adapted to carry away heat from the reservoir (14).

Technical Field

The invention relates to the technical field of temperature adjusting equipment, in particular to a heat pump unit capable of improving the refrigerating and heating efficiency.

Background

With the development of economy, air conditioners have been widely used in daily life of people to adjust the temperature.

An existing air conditioner generally has a refrigeration cycle system including a compressor forming a refrigeration circuit, a four-way valve, an outdoor heat exchanger, a throttling element, and an indoor heat exchanger. However, since the compressor of the conventional air conditioner is fixed, the cooling and heating efficiency is determined, and cannot be improved, and in the case of frosting of the outdoor heat exchanger, the indoor heating effect is greatly reduced, and the use comfort of the user is poor.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide a heat pump unit, which solves the technical problems that the existing air conditioner has definite refrigeration and heating efficiency, cannot be improved, and has greatly reduced heating effect under special conditions and poor use comfort of users.

The invention provides a heat pump unit which comprises a main circulating system, wherein the main circulating system comprises a main compressor, a main four-way valve, an outdoor heat exchanger, a main throttling element and an indoor heat exchanger, the main compressor forms a main circulating loop, the heat pump unit comprises an auxiliary system, the auxiliary system comprises a first auxiliary heat exchanger, and the first auxiliary heat exchanger is used for generating energy opposite to that of the outdoor heat exchanger and applying the energy to the outdoor heat exchanger or a refrigerant pipeline connected with the outdoor heat exchanger.

In the heat pump unit, the heat exchanger fin of the first secondary heat exchanger is in contact with the heat exchanger fin of the outdoor heat exchanger, or the refrigerant pipeline of the first secondary heat exchanger and the refrigerant pipeline of the outdoor heat exchanger share the heat exchange fin, or at least part of the refrigerant pipeline of the first secondary heat exchanger is located in the refrigerant pipeline of the outdoor heat exchanger, or at least part of the refrigerant pipeline of the outdoor heat exchanger is located in the refrigerant pipeline of the first secondary heat exchanger.

The heat pump unit comprises an auxiliary system and a first auxiliary heat exchanger, wherein the auxiliary system comprises a temperature difference heat exchanger, and the first auxiliary heat exchanger and a refrigerant pipeline connected with the outdoor heat exchanger are positioned in the temperature difference heat exchanger.

The heat pump unit as described above, the refrigerant pipeline of the first secondary heat exchanger and the refrigerant pipeline connected to the outdoor heat exchanger are spirally disposed in the thermoelectric heat exchanger, or at least a part of the refrigerant pipeline of the first secondary heat exchanger is located in the refrigerant pipeline connected to the outdoor heat exchanger, or at least a part of the refrigerant pipeline connected to the outdoor heat exchanger is located in the refrigerant pipeline of the first secondary heat exchanger.

The auxiliary system comprises an auxiliary compressor, a valve unit, a second auxiliary heat exchanger, an auxiliary throttling element and a first auxiliary heat exchanger, wherein the auxiliary compressor, the valve unit, the second auxiliary heat exchanger, the auxiliary throttling element and the first auxiliary heat exchanger form an auxiliary circulation loop.

The auxiliary system comprises a third auxiliary heat exchanger and a solar heat collector, the solar heat collector is used for transferring generated heat to the third auxiliary heat exchanger, and the valve unit is used for connecting the third auxiliary heat exchanger between the air return port of the auxiliary compressor and the second auxiliary heat exchanger when the temperature of the solar heat collector is higher than a specific temperature and the first auxiliary heat exchanger is in a heating state.

The auxiliary system comprises a fourth auxiliary heat exchanger and a liquid storage device, wherein the fourth auxiliary heat exchanger is used for exchanging heat with the liquid storage device; the valve unit is used for connecting the fourth auxiliary heat exchanger between the exhaust port of the auxiliary compressor and the second auxiliary heat exchanger when the temperature of the liquid storage device is lower than a specific temperature and the first auxiliary heat exchanger is in a refrigeration state, and/or the valve unit is used for connecting the fourth auxiliary heat exchanger between the exhaust port of the auxiliary compressor and the first auxiliary heat exchanger when the temperature of the liquid storage device is higher than a self-set temperature and the first auxiliary heat exchanger is in a heating state.

The auxiliary system comprises a third auxiliary heat exchanger and a solar heat collector, and the solar heat collector is used for transferring generated heat to the third auxiliary heat exchanger; the auxiliary system comprises a fourth auxiliary heat exchanger and a liquid storage device, wherein the fourth auxiliary heat exchanger is used for transferring heat to the liquid storage device; the valve unit is used for connecting the fourth auxiliary heat exchanger between an exhaust port of the auxiliary compressor and the first auxiliary heat exchanger when the temperature of the liquid storage device is higher than the self-set temperature and the first auxiliary heat exchanger is in a heating state; and/or the valve unit is used for connecting the fourth secondary heat exchanger between the exhaust port of the secondary compressor and the first secondary heat exchanger when the liquid storage device is lower than a second specific temperature, the temperature of the solar heat collector is lower than a specific temperature and the first secondary heat exchanger is in a heating state; and/or the valve unit is used for connecting the fourth auxiliary heat exchanger between the exhaust port of the auxiliary compressor and the first auxiliary heat exchanger and connecting the third auxiliary heat exchanger between the second auxiliary heat exchanger and the return air port of the auxiliary compressor when the temperature of the liquid storage device is lower than a second specific temperature, the temperature of the solar heat collector is higher than a specific temperature and the first auxiliary heat exchanger is in a heating state.

The heat pump unit comprises a first auxiliary heat exchanger, a second auxiliary throttling element, a valve unit and a control unit, wherein the first auxiliary throttling element is arranged between the first auxiliary heat exchanger and the second auxiliary heat exchanger, and the valve unit is used for switching to a state that the auxiliary compressor, the second auxiliary throttling element and the third auxiliary heat exchanger form a circulation loop when the main compressor is stopped and the temperature of the liquid storage device is lower than a self set temperature.

The heat pump unit as described above, the liquid storage device includes a pipe and a pump, and the pipe and the pump are used for taking away heat of the liquid storage device.

Compared with the prior art, the invention has the advantages and positive effects that: the heat pump unit comprises a main circulation system and an auxiliary system, wherein the main circulation system comprises a main compressor forming a main circulation loop, a main four-way valve, an outdoor heat exchanger, a main throttling element and an indoor heat exchanger, and the auxiliary system comprises a first auxiliary heat exchanger which is used for generating energy opposite to that of the outdoor heat exchanger and applying the energy to the outdoor heat exchanger or a refrigerant pipeline connected with the outdoor heat exchanger.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a heat pump unit of embodiment 1 of the present invention;

FIGS. 2-8 are schematic views of the assembly of the present invention in 7 states;

FIG. 9 is a schematic view of a heat pump unit of embodiment 2 of the present invention;

FIG. 10 is a schematic view of a heat pump unit of embodiment 3 of the present invention;

fig. 11 is an enlarged view of fig. 10A.

Wherein, 1, a main compressor; 2. an outdoor heat exchanger; 3. an indoor heat exchanger; 4. an indoor fan; 5. a primary throttling element; 6. a main liquid storage tank; 7. a secondary compressor; 8. a second secondary heat exchanger; 9. a first secondary heat exchanger; 10. a secondary throttling element; 11. a secondary liquid storage tank; 12. a third secondary heat exchanger; 13. a solar heat collector; 14. a liquid storage device; 15. a fourth secondary heat exchanger; 16. a water pump; 17. a temperature difference exchanger; 18. a second secondary throttling element;

20. a main four-way valve; 22. a first secondary four-way valve; 25. a second pair of four-way valves; 26. a third auxiliary four-way valve; 27. a fourth auxiliary four-way valve; 23. a first indoor four-way valve; 24. and a four-way valve in the second chamber.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Example one

As shown in fig. 1, the present embodiment provides a heat pump unit, which includes a main circulation system, where the main circulation system includes a main compressor 1, a main four-way valve 20, an outdoor heat exchanger 2, a liquid storage tank 6, a main throttling element 5, and an indoor heat exchanger 3, and the indoor heat exchanger 3 is used to provide cold or heat to the indoor space. Wherein, the indoor heat exchanger is provided with at least one, and in this embodiment, the indoor set has 3, and every indoor set has an indoor heat exchanger 3, and every indoor heat exchanger corresponds an indoor fan 4, sets up first indoor cross valve 23 and the indoor cross valve 24 of second between indoor heat exchanger 3, through first indoor cross valve 23 and the indoor cross valve 24 control indoor heat exchanger 3 whether insert the main loop.

Specifically, the connection mode of the main circulation system is as follows: an air outlet of the main compressor 1 is connected with a connector 1 of a main four-way valve 20, a connector 2 of the main four-way valve 20 is connected with an indoor heat exchanger 3, the indoor heat exchanger 3 is connected with a main throttling element 5, the main throttling element 5 is connected with a main liquid storage tank 6, the main liquid storage tank 6 is connected with an outdoor heat exchanger 2, the outdoor heat exchanger 2 is connected with the connector 3 of the main four-way valve 20, and a connector 4 of the main four-way valve 20 is connected with an air return port of the main compressor 1.

In order to improve the efficiency of the indoor heat exchanger 3, the heat pump unit of the present embodiment further includes an auxiliary system, and the auxiliary system includes a first auxiliary heat exchanger 9, and the first auxiliary heat exchanger 9 is used for generating energy opposite to that of the outdoor heat exchanger 2 and applying the energy to the outdoor heat exchanger 2. Specifically, when the outdoor heat exchanger 2 is used for heating, the first auxiliary heat exchanger 9 is used for cooling, and when the outdoor heat exchanger 2 is used for cooling, the first auxiliary heat exchanger 9 is used for heating.

The first sub heat exchanger 9 is used to generate energy opposite to the outdoor heat exchanger 2 and apply the energy to a refrigerant pipe connected to the outdoor heat exchanger 2.

Specifically, the auxiliary system comprises a temperature difference heat exchanger 17, the first auxiliary heat exchanger 9 and a refrigerant pipeline connected with the outdoor heat exchanger 2 are positioned in the temperature difference heat exchanger 17, and heat exchange is carried out in the temperature difference heat exchanger 17.

The refrigerant pipeline of the first secondary heat exchanger 9 and the refrigerant pipeline connected with the outdoor heat exchanger 2 are spirally arranged in the temperature difference heat exchanger 17.

The auxiliary system of the present embodiment comprises a secondary compressor 7, a valve unit, a second secondary heat exchanger 8, a secondary throttling element 10 and a first secondary heat exchanger 9 forming a secondary circulation circuit. Of course, a sub-tank 11 may be provided. The first sub heat exchanger 9 is set in a cooling state or a heating state by operating the sub compressor 7 and switching the valve unit.

In order to save energy, in some embodiments, clean energy is further used to reduce the power consumption of the secondary compressor 7, and the auxiliary system of the present embodiment includes a third secondary heat exchanger 12 and a solar collector 13, and the solar collector 13 is used to transfer the generated heat to the third secondary heat exchanger 12. The valve unit is used for connecting the third auxiliary heat exchanger 12 between the air return port of the auxiliary compressor 1 and the second auxiliary heat exchanger 8 when the temperature of the solar heat collector 13 is higher than a specific temperature and the first auxiliary heat exchanger 9 is in a heating state.

In some embodiments, the auxiliary system further comprises a fourth secondary heat exchanger 15 and the reservoir 14, the fourth secondary heat exchanger 15 being for transferring heat to the reservoir 14; the valve unit is used for connecting the fourth auxiliary heat exchanger 15 between the exhaust port of the auxiliary compressor 7 and the second auxiliary heat exchanger 8 when the temperature of the liquid storage device 14 is lower than a specific temperature and the first auxiliary heat exchanger 9 is in a cooling state, and/or the valve unit is used for connecting the fourth auxiliary heat exchanger 15 between the exhaust port of the auxiliary compressor 7 and the first auxiliary heat exchanger 9 when the temperature of the liquid storage device 14 is higher than the self-set temperature and the first auxiliary heat exchanger 9 is in a heating state.

In some embodiments, the auxiliary system comprises a third secondary heat exchanger 12 and a solar collector 13, the solar collector 13 being for transferring the generated heat to the third secondary heat exchanger 12; the auxiliary system further comprises a fourth secondary heat exchanger 15 and a liquid storage device 14, wherein the fourth secondary heat exchanger 15 is used for transferring heat to the liquid storage device 14; the valve unit is used for connecting the fourth auxiliary heat exchanger 15 between the exhaust port of the auxiliary compressor 7 and the first auxiliary heat exchanger 9 when the temperature of the liquid storage device 14 is higher than the self-set temperature and the first auxiliary heat exchanger 9 is in a heating state; and/or, the valve unit is used for connecting the fourth secondary heat exchanger 15 between the exhaust port of the secondary compressor 7 and the first secondary heat exchanger 9 when the temperature of the liquid storage device 14 is lower than the second specific temperature, the temperature of the solar heat collector 13 is lower than the specific temperature and the first secondary heat exchanger 9 is in a heating state; and/or the valve unit is used for connecting the fourth auxiliary heat exchanger 15 between the exhaust port of the auxiliary compressor 7 and the first auxiliary heat exchanger 9 and connecting the third auxiliary heat exchanger 12 between the second auxiliary heat exchanger 8 and the return port of the auxiliary compressor 7 when the temperature of the liquid storage device 14 is lower than the second specific temperature, the temperature of the solar heat collector 13 is higher than the specific temperature and the first auxiliary heat exchanger 9 is in a heating state.

Further, a second sub-throttling element 18 is arranged between the third sub-heat exchanger 12 and the fourth sub-heat exchanger 15, and the valve unit is used for switching to a state that the sub-compressor 7, the fourth sub-heat exchanger 15, the second sub-throttling element 18 and the third sub-heat exchanger 15 form a circulation loop when the main compressor 1 is stopped and the temperature of the liquid storage device 14 is lower than the self-set temperature.

The liquid storage device 14 includes a pipe and a pump 16, and the pipe and the pump 16 are used for removing heat from the liquid storage device 14. The piping and pump 16 is used for supplying hot water, heating from a heat source, and the like.

The auxiliary system including the solar thermal collector 13 and the liquid storage device 14 will be described as an example.

The valve unit includes: a first secondary four-way valve 22, a second secondary four-way valve 25, a third secondary four-way valve 26, and a fourth secondary four-way valve 27.

When the indoor needs to be heated, the interface 3 of the main four-way valve 20 is conducted with the interface 4, the interface 1 is conducted with the interface 2, the high-pressure refrigerant generated by the main compressor 1 enters the indoor heat exchanger 3 (condenser) through the main four-way valve 20, enters the outdoor heat exchanger 2 (evaporator) through the main throttling element 5 to generate the low-pressure refrigerant, and returns to the main compressor 1 through the main four-way valve 20. At this time, the state of the sub-circulation circuit according to the set conditions is as follows:

the heat that the first auxiliary heat exchanger 9 of this embodiment produced heats for outdoor heat exchanger 2 (evaporimeter), can make indoor rapid heating up on the one hand, improves heating efficiency, and on the other hand still can avoid outdoor heat exchanger 2 to frost or for its defrosting, heating inefficiency and the defrosting problem that outdoor heat exchanger 2 frosted and caused are avoided.

When the temperature of the solar heat collector 13 is higher than a specific temperature, the third auxiliary heat exchanger 12 can be connected into the circulating system to save energy.

When the temperature of the liquid storage device 14 is higher than the self-set temperature, the fourth auxiliary heat exchanger 15 can be connected into the circulating system to save energy.

When the indoor needs to be cooled, the interface 1 of the main four-way valve 20 is conducted with the interface 3, the interface 2 is conducted with the interface 4, the high-pressure refrigerant generated by the main compressor 1 enters the outdoor heat exchanger 2 (condenser) through the main four-way valve 20, enters the indoor heat exchanger 3 (evaporator) through the main throttling element 5 to generate the low-pressure refrigerant, and returns to the main compressor 1 through the main four-way valve 20. At this time, the state of the sub-circulation circuit according to the set conditions is as follows:

the cold energy that this embodiment first secondary heat exchanger 9 produced gives outdoor heat exchanger 2 (condenser) cooling, can make indoor rapid cooling, improves refrigeration efficiency.

When the temperature of the liquid storage device 14 is lower than the specific temperature, the liquid storage device 14 can be connected into the circulating system to further provide cold energy for the first secondary heat exchanger 9 so as to save energy.

When the main compressor 1 is not started, the accumulator 14 can also be charged with heat by the auxiliary compressor 7, the state of the auxiliary circuit being as shown in the following table:

the specific temperature refers to the temperature at which the cold medium can obtain heat from the solar heat collector or the liquid storage tank. For example, the specific temperature is generally any value between 55 and 65 degrees.

The second specific temperature refers to a temperature at which the temperature of the reservoir device does not differ much from the temperature of the air, and is generally any value between 40 and 50 degrees, for example.

The self-set temperature is a temperature value set by the user for the liquid storage device 14 according to the requirement.

Of course, the valve unit is not limited to the above form, and any combination of electronic valves capable of implementing the present invention is within the scope of the present invention.

Example two

As shown in fig. 9, the present embodiment is different from the first embodiment in that: the refrigerant pipeline of the first secondary heat exchanger 9 and the refrigerant pipeline connected with the outdoor heat exchanger 2 are arranged in different manners in the temperature difference heat exchanger 17, and the arrangement manner of the embodiment is that at least part of the refrigerant pipeline of the first secondary heat exchanger 9 is positioned in the refrigerant pipeline connected with the outdoor heat exchanger 2, or at least part of the refrigerant pipeline connected with the outdoor heat exchanger 2 is positioned in the refrigerant pipeline of the first secondary heat exchanger 9.

EXAMPLE III

As shown in fig. 10 and 11, the present embodiment is different from the first embodiment in that: the present embodiment does not provide a temperature difference exchanger, but directly exchanges heat between the first sub heat exchanger 9 and the outdoor heat exchanger 2. Specifically, the specific way of applying the energy of the first secondary heat exchanger 9 to the outdoor heat exchanger 2 is as follows:

the heat exchanger fins of the first secondary heat exchanger 9 are in contact with the heat exchanger fins of the outdoor heat exchanger 2.

Or the refrigerant pipeline of the first secondary heat exchanger 9 and the refrigerant pipeline of the outdoor heat exchanger 2 share the heat exchange fin.

Alternatively, as shown in fig. 11, at least a part of the refrigerant pipeline of the first secondary heat exchanger 9 is located in the refrigerant pipeline of the outdoor heat exchanger 2, or at least a part of the refrigerant pipeline of the outdoor heat exchanger 2 is located in the refrigerant pipeline of the first secondary heat exchanger 9. In this way, the first auxiliary heat exchanger 9 and the outdoor heat exchanger 2 are connected by welding to realize sealing and avoid leakage of the refrigerant. The outdoor heat exchanger 2 and the first sub heat exchanger 9 are of an integrated structure and respectively have an inlet and an outlet.

The difference between the state of the secondary circulation circuit according to the set conditions in the present embodiment and the first embodiment is that the first secondary heat exchanger 9 in the temperature difference exchanger 17 of the first embodiment is replaced with the first secondary heat exchanger 9.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.