CN112577213A

CN112577213A - Thermal management system

Info

Publication number: CN112577213A
Application number: CN201910945514.7A
Authority: CN
Inventors: 董军启; 贾世伟; 其他发明人请求不公开姓名
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-03-30
Also published as: EP3982059A4; EP3982059A1; US20220243961A1; EP3982059B1; WO2021063272A1

Abstract

The application provides a heat management system, which comprises a compressor, a first heat exchanger, a first throttling device, a second heat exchanger, a cooling liquid circulating flow path, a third heat exchanger and a fourth heat exchanger, wherein the third heat exchanger comprises a first heat exchanging part and a second heat exchanging part which can exchange heat; the heat management system comprises a refrigeration mode, wherein in the refrigeration mode, an outlet of the compressor, the first heat exchange part, the first heat exchanger, the first throttling device, the second heat exchanger and an inlet of the compressor are communicated to form a refrigerant circulation loop, the cooling liquid circulation flow path, the second heat exchange part and the fourth heat exchanger are communicated to form a cooling liquid loop, and cooling liquid in the second heat exchange part can absorb heat of the refrigerant in the first heat exchange part; the first heat exchanger and the fourth heat exchanger are positioned outside the air-conditioning box, and the second heat exchanger is positioned in the air-conditioning box. And a third heat exchanger is arranged at the outlet of the compressor, and the third heat exchanger can bear the heat exchange pressure of a part of outdoor heat exchangers in the refrigeration mode.

Description

Thermal management system

Technical Field

The application relates to the field of air conditioners, in particular to a thermal management system.

Background

The heat management system can realize refrigeration, heating, ventilation and air purification of indoor air, and provides a comfortable environment for indoor personnel. How to optimize the thermal management system is currently the focus of improving the performance of the thermal management system.

In the related heat management system, in a cooling mode, a high-temperature and high-pressure refrigerant flows out from an outlet of the compressor and directly enters the outdoor heat exchanger, the temperature of the refrigerant flowing out from the outlet of the compressor is high, and when the temperature of the outdoor environment is high, the temperature of the refrigerant flowing out from the outdoor heat exchanger is still high after the refrigerant exchanges heat with the external environment in the outdoor heat exchanger, so that the cooling effect of the heat management system is poor.

Disclosure of Invention

The application provides a heat management system to promote the refrigeration effect of heat management system under high temperature environment.

Specifically, the method is realized through the following technical scheme:

a heat management system comprises a compressor, a first heat exchanger, a first throttling device, a second heat exchanger, a cooling liquid circulation flow path, a third heat exchanger, a fourth heat exchanger and an air conditioning box, wherein the third heat exchanger comprises a first heat exchanging part and a second heat exchanging part which can exchange heat;

the heat management system comprises a refrigeration mode, in the refrigeration mode, an outlet of the compressor, the first heat exchange part, the first heat exchanger, the first throttling device, the second heat exchanger and an inlet of the compressor are communicated to form a refrigerant circulation loop, the cooling liquid circulation flow path, the second heat exchange part and the fourth heat exchanger are communicated to form a cooling liquid loop, and cooling liquid in the second heat exchange part can absorb heat of the refrigerant in the first heat exchange part;

the first heat exchanger and the fourth heat exchanger are located outside the air-conditioning box, and the second heat exchanger is located inside the air-conditioning box.

Optionally, the thermal management system further includes a first fan located outside the air conditioning cabinet, and the first heat exchanger and the fourth heat exchanger are arranged along an airflow direction of the first fan.

Optionally, the thermal management system further comprises a fifth heat exchanger, and the fifth heat exchanger comprises a third heat exchanging part and a fourth heat exchanging part which can exchange heat;

in the refrigeration mode, an outlet of the compressor, the first heat exchanging part, the first heat exchanger, the third heat exchanging part, the first throttling device, the second heat exchanger, the fourth heat exchanging part and an inlet of the compressor are communicated to form a refrigerant circulation loop.

Optionally, the thermal management system further comprises a second throttling device and a sixth heat exchanger, wherein the sixth heat exchanger is positioned in the air conditioning cabinet;

the heat management system further comprises a heating mode, and in the heating mode, an outlet of the compressor, the first heat exchanging part, the sixth heat exchanger, the second throttling device, the third heat exchanging part, the first heat exchanger, the fourth heat exchanging part and an inlet of the compressor are communicated to form a refrigerant circulation loop.

Optionally, the thermal management system further comprises a heating and dehumidifying mode;

in the heating and dehumidifying mode, an outlet of the compressor, the first heat exchanging portion, the sixth heat exchanger, the second throttling device, the third heat exchanging portion, the first heat exchanger, the fourth heat exchanging portion, and an inlet of the compressor are communicated to form a first refrigerant circulation loop, and an outlet of the compressor, the first heat exchanging portion, the sixth heat exchanger, the first throttling device, the second heat exchanger, the fourth heat exchanging portion, and an inlet of the compressor are communicated to form a second refrigerant circulation loop.

Optionally, the thermal management system further comprises a four-way valve comprising a first, a second, a third and a fourth port;

the first heat exchange part comprises a first inlet and a first outlet, the first heat exchanger comprises a first interface and a second interface, the second heat exchanger comprises a third interface and a fourth interface, the sixth heat exchanger comprises a fifth interface and a sixth interface, and the third heat exchange part comprises a seventh interface and an eighth interface;

the first inlet is communicated with an outlet of the compressor, and the first outlet is communicated with the fifth interface; the first port is connected with the first outlet and the sixth port; the second port is connected with the first port, the second port is connected with the seventh port, the eighth port is connected with one end of the second throttling device, the third port is connected with the other end of the second throttling device and is connected with one end of the first throttling device, the third port is connected with the other end of the first throttling device, and the fourth port are connected with the inlet of the compressor through the fourth heat exchange part.

Optionally, the thermal management system further includes a stop valve, one end of the stop valve is connected to the first outlet and connected to the fifth interface, and the other end of the stop valve is connected to the first port and connected to the sixth interface.

Optionally, the thermal management system further comprises a check valve connected in parallel with the second throttling device.

Optionally, the thermal management system further includes a first branch and a control valve, the first branch is connected in parallel with the third heat exchanger, and the control valve is connected to the first branch.

Optionally, the coolant circulation flow path comprises a motor and a pump device.

According to the technical scheme, the third heat exchanger is arranged at the outlet of the compressor, so that under the refrigeration mode, the refrigerant flowing out of the outlet of the compressor passes through the third heat exchanger, is cooled by the third heat exchanger and then flows into the first heat exchanger (namely the outdoor heat exchanger), the heat of the refrigerant loop is brought to the external environment through the cooling liquid loop, the heat exchange pressure of a part of outdoor heat exchangers is borne, the problem that the heat exchange capacity of the outdoor heat exchanger is insufficient under the high-temperature environment is effectively solved, and the refrigeration effect of the heat management system is improved.

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 schematic structural diagram of a thermal management system provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a refrigerant, coolant flow path of the thermal management system of FIG. 1 in a cooling mode, with the flow path shown in bold;

FIG. 3 is a schematic diagram of a refrigerant flow path of the thermal management system of FIG. 1 in a heating mode, with the flow path represented in bold;

FIG. 4 is a schematic diagram of a refrigerant flow path of the thermal management system of FIG. 1 in a heating and dehumidification mode, with the flow path shown in bold;

fig. 5 is a partially cut-away structural schematic diagram of a third heat exchanger provided by an embodiment of the present application.

Reference numerals:

1: a compressor; 2: a first heat exchanger; 21: a first interface; 22: a second interface; 3: a first throttling device; 4: a second heat exchanger; 41: a third interface; 42: a fourth interface; 5: a coolant circulation flow path; 51: a motor; 52: a pump device; 6: a third heat exchanger; 61: a first heat exchanging portion; 611: a first inlet; 612: a first outlet; 62: a second heat exchanging portion; 7: a fourth heat exchanger; 8: a gas-liquid separator; 9: a first fan; 10: a fifth heat exchanger; 11: a third heat exchanging portion; 111: a seventh interface; 112: an eighth interface; 12: a fourth heat exchanging portion; 13 an air conditioning box; 14: a damper; 15: a first current collecting member; 16: a second current collecting member; 17: a heat exchange pipe; 18: a heat sink; 19: a housing; 20: a second throttling device; 30: a sixth heat exchanger; 301: a fifth interface; 302: a sixth interface; 40: a four-way valve; 401: a first port; 402: a second port; 403: a third port; 404: a fourth port; 50: a stop valve; 60: a one-way valve; 70: a second fan; 80: and (4) controlling the valve.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

The thermal management system of the present application is described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

With reference to fig. 1 to 4, a thermal management system provided in an embodiment of the present application may include a compressor 1, a first heat exchanger 2, a first throttling device 3, a second heat exchanger 4, a coolant circulation flow path 5, a third heat exchanger 6, a fourth heat exchanger 7, and an air conditioning box 13. The third heat exchanger 6 includes a first heat exchanging portion 61 and a second heat exchanging portion 62, and the first heat exchanging portion 61 and the second heat exchanging portion can exchange heat. The first heat exchanger 2 and the fourth heat exchanger 7 of this embodiment are located outside the air-conditioning box 13, the second heat exchanger 4 is located in an indoor air inlet channel, and the indoor air inlet channel is a channel of the air-conditioning box 13, that is, the second heat exchanger 4 is located in the air-conditioning box 13.

Referring to fig. 2, in the cooling mode, the thermal management system includes two loops, namely a refrigerant circulation loop and a cooling liquid circulation loop. Wherein, the outlet of the compressor 1, the first heat exchanging part 61, the first heat exchanger 2, the first throttling device 3, the second heat exchanger 4 and the inlet of the compressor 1 are communicated to form a refrigerant circulating loop, optionally, the outlet of the compressor 1, the first heat exchanging part 61, the first heat exchanger 2, the first throttling device 3, the second heat exchanger 4 and the inlet of the compressor 1 are communicated in sequence to form a refrigerant circulating loop.

The coolant circulation flow path 5, the second heat exchanging portion 62, and the fourth heat exchanger 7 are communicated to form a coolant circuit, alternatively, the coolant circulation flow path 5, the second heat exchanging portion 62, and the fourth heat exchanger 7 are communicated in this order to form a coolant circuit, but the above-described structures in the coolant circuit may be communicated in another order.

It should be noted that, in the embodiment of the present application, the sequential connection only illustrates a sequential relationship of connection between the respective devices, and other devices, such as a stop valve, may also be included between the respective devices. The type of the coolant in the present application may be selected as needed, and for example, the coolant may be water, oil, or the like capable of heat exchange, or a mixed liquid of water and ethylene glycol, or another mixed liquid capable of heat exchange.

In the present embodiment, the coolant in the second heat exchanging portion 62 can cool the refrigerant in the first heat exchanging portion 61.

Specifically, in the cooling mode, the first heat exchanger 2 is used as a condenser, and the second heat exchanger 4 is used as an evaporator. Referring to fig. 2, the compressor 1 compresses low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant flows out from an outlet of the compressor 1 and enters the first heat exchanging part 61, the refrigerant in the first heat exchanging part 61 exchanges heat with the cooling liquid in the second heat exchanging part 62, the refrigerant releases heat, the released heat is carried to the fourth heat exchanger 7 by the cooling liquid loop, the heated cooling liquid exchanges heat with outdoor air flow in the fourth heat exchanger 7, the cooling liquid releases heat, the released heat is carried to outdoor ambient air by the air flow, and the low-temperature cooling liquid is continuously recycled in the cooling liquid loop; after the refrigerant in the first heat exchanging portion 61 releases heat, the cooled refrigerant enters the first heat exchanger 2, exchanges heat with outdoor air flow in the first heat exchanger 2, releases heat, the released heat is carried to outdoor ambient air by the air flow, and the refrigerant is subjected to phase change and condensed into a liquid or gas-liquid two-phase refrigerant. The refrigerant flows out of the first heat exchanger 2, enters the first throttling device 3 to be expanded, and is cooled and depressurized to become low-temperature and low-pressure refrigerant. The low-temperature low-pressure refrigerant enters the second heat exchanger 4, the low-temperature low-pressure refrigerant absorbs the heat of the air around the second heat exchanger 4, so that the temperature of the air around the second heat exchanger 4 is reduced, and under the action of air flow, cold air enters a channel of the air conditioning box 13 and is sent into the room, so that the indoor temperature is reduced. The refrigerant undergoes phase change and is partially or completely evaporated into a low-temperature and low-pressure gaseous refrigerant, and the gaseous refrigerant flows back into the compressor 1, so that the refrigerant is recycled.

The third heat exchanger 6 is arranged at the outlet of the compressor 1, and in the cooling mode, the refrigerant in the first heat exchanging part 61 is cooled by the cooling liquid in the second heat exchanging part 62, so that the temperature of the refrigerant in the outlet pipeline of the compressor 1 can be reduced, for example, the temperature of the refrigerant is reduced from 150 ℃ to 80 ℃, the temperature of the refrigerant flowing into the first heat exchanger 2 is reduced, and the heat exchange pressure of the first heat exchanger 2 is reduced. The cooled refrigerant is subjected to heat exchange with the external environment through the first heat exchanger 2, and the temperature of the refrigerant is further reduced, for example, the temperature of the refrigerant is reduced from 80 ℃ to 47 ℃. The refrigerant flowing out of the first heat exchanger 2 sequentially flows through the first throttling device 3 to be depressurized, flows through the second heat exchanger 4 to be subjected to heat absorption and evaporation, and then flows back into the compressor 1, so that the cyclic utilization of the refrigerant is realized.

The heat management system of the embodiment of the application, through setting up the third heat exchanger 6 at the export of compressor 1, under the refrigeration mode, the refrigerant that the export of compressor 1 flows out can be earlier through the third heat exchanger 6, by the first heat exchanger 2 of second heat exchanger (being outdoor heat exchanger) of third heat exchanger 6 cooling back, in taking the heat of refrigerant circuit to the external environment through the coolant liquid return circuit, undertake the heat transfer pressure of a part of outdoor heat exchanger, effectively solve the problem that the outdoor heat exchanger ability is not enough under the high temperature environment (for example between 35 ℃ -50 ℃), improve the refrigerating capacity of system.

The type of the first heat exchanger 2, the second heat exchanger 4, the third heat exchanger 6, and the fourth heat exchanger 7 may be selected by a person skilled in the art according to a specific scenario, for example, the first heat exchanger 2, the second heat exchanger 4, and the fourth heat exchanger 7 may be air-cooled heat exchangers, and the third heat exchanger 6 is a water-cooled heat exchanger. Referring to fig. 5, the third heat exchanger 6 includes a first collecting member 15, a second collecting member 16 and a housing 19, the housing 19 has opposite ends, the two ends of the housing 19 are respectively and hermetically connected to the first collecting member 15 and the second collecting member 16 to define a heat exchange chamber, heat exchange tubes 17 and heat dissipation members 18 are disposed in the third heat exchanger 6, the heat exchange tubes 17 and the heat dissipation members 18 are alternately stacked one on another in the heat exchange chamber, the heat exchange tubes 17 and the heat dissipation members 18 are fixedly connected, and the two ends of the heat exchange tubes 17 are respectively and fixedly connected to the first collecting member 15 and the second collecting member 16, the first collecting member 15 and the second collecting member 16 have collecting chambers, and the collecting chambers are communicated with lumens of the heat exchange tubes 17, so that a refrigerant can flow between the first collecting member 15 and the second collecting member 16. The two opposite sides of the shell 19 are also provided with inlet pipes and outlet pipes, so that cooling liquid can enter and exit the heat exchange cavity, the cooling liquid enters the heat exchange cavity and exchanges heat with the refrigerant through the heat exchange pipes 17, the heat dissipation members 18 can be corrugated fins and used for improving heat exchange efficiency, and the heat exchange pipes 17 can be micro-channel flat pipes. The second collecting member 16 is provided with two connecting members for connecting refrigerant lines, respectively, so that the refrigerant can enter and exit the second collecting member 16. It is understood that those skilled in the art can select other types of heat exchangers as the first heat exchanger 2, the second heat exchanger 4, the third heat exchanger 6 and the fourth heat exchanger 7 according to specific scenarios, which are not limited herein. The refrigerant of the corresponding type can be selected according to practical application and the appropriate heat exchanger can be adopted, for example, the third heat exchanger 6 can adopt a structure as shown in fig. 5, the structure has the characteristic of high pressure resistance strength, and the refrigerant can be made of media with high pressure resistance requirements, such as carbon dioxide.

In this embodiment, the thermal management system further comprises a functional component capable of generating heat. The coolant circulation flow path 5 includes the above-described functional components, and the coolant circulation flow path 5 dissipates heat from the functional components. Therefore, the cooling liquid loop of the embodiment can also carry out heat dissipation on the functional components in the thermal management system, and normal operation of the functional components is ensured, so that stable operation of the thermal management system in a refrigeration mode is effectively ensured. Referring to fig. 1, the functional components may include a motor 51, and the cooling liquid loop can also perform heat dissipation of the motor 51 in the thermal management system, so as to ensure normal operation of the motor 51, thereby effectively ensuring stable operation of the thermal management system in the cooling mode. It is understood that the functional components may also include other components capable of generating heat, such as a battery, etc., and the thermal management system may recycle the waste heat generated by the functional components, for example, in the winter heating mode, the waste heat of the functional components may be utilized to improve the heating capability of the thermal management system. Further, referring again to fig. 1, the coolant circulation flow path 5 may further include a pump device 52, and the circulation flow of the coolant in the coolant circuit can be driven by providing the pump device 52. Optionally, in an embodiment, the coolant flow path of the coolant circuit comprises: the pump device 52- > the motor 51 (or other functional component) - > the second heat exchanging portion 62- > the fourth heat exchanger 7.

Referring to fig. 1, the thermal management system may further include a first fan 9 located outside the air conditioning cabinet 13, in this embodiment, the first heat exchanger 2 and the fourth heat exchanger 7 are arranged along the airflow direction of the first fan 9, and by adopting this arrangement, the first heat exchanger 2 and the second heat exchanger 4 share the fan, so that the installation space is saved. Optionally, the first fan 9, the first heat exchanger 2 and the fourth heat exchanger 7 are arranged at intervals in a row or a column; optionally, the fourth heat exchanger 7 is located between the first fan 9 and the first heat exchanger 2, and the air flow generated by the first fan 9 can take away the heat of the coolant in the fourth heat exchanger 7 more quickly, so as to accelerate the cooling effect of the coolant circuit and reduce the temperature of the refrigerant in the second heat exchanging portion 62 more quickly.

In addition, referring to fig. 1 again, the inlet of the compressor 1 may be further connected to a gas-liquid separator 8, so as to perform gas-liquid separation on the returned refrigerant, store the liquid part in the gas-liquid separator 8, and allow the low-temperature and low-pressure gaseous refrigerant part to enter the compressor 1 for recompression, thereby realizing the recycling of the refrigerant. Of course, the gas-liquid separator 8 may not be provided for some new compressors, such as a compressor having a function of storing liquid or a gas-liquid separation function.

The structure of the thermal management system is further explained below by providing a gas-liquid separator 8 at the inlet of the compressor 1.

Referring to fig. 1 and 2, the thermal management system may further include a fifth heat exchanger 10, and the fifth heat exchanger 10 includes a third heat exchanging portion 11 and a fourth heat exchanging portion 12. Referring to fig. 2, in the cooling mode, the outlet of the compressor 1, the first heat exchanging portion 61, the first heat exchanger 2, the third heat exchanging portion 11, the first throttling device 3, the second heat exchanger 4, the gas-liquid separator 8, the fourth heat exchanging portion 12, and the inlet of the compressor 1 are communicated to form a refrigerant circulation circuit. Specifically, in the cooling mode, the refrigerant flowing out of the first heat exchanger 2 passes through the third heat exchanging portion 11, and the refrigerant in the third heat exchanging portion 11 exchanges heat with the refrigerant in the fourth heat exchanging portion 12 (low-pressure side pipe), so that the temperature of the refrigerant is further reduced, and the cooling effect of the thermal management system is further improved. The refrigerant flowing out of the third heat exchanging portion 11 enters the first throttling device 3 to be expanded, cooled and depressurized, and then changed into a low-temperature and low-pressure refrigerant. The low-temperature low-pressure refrigerant enters the second heat exchanger 4, the low-temperature low-pressure refrigerant absorbs the heat of the air around the second heat exchanger 4, so that the temperature of the air around the second heat exchanger 4 is reduced, and under the action of air flow, cold air enters a channel of the air conditioning box 13 and is sent into the room, so that the indoor temperature is reduced. The refrigerant changes phase and is mostly evaporated into a low-temperature low-pressure gas refrigerant, which flows into the gas-liquid separator 8, the gas-liquid separator 8 separates the returned refrigerant, the liquid part of the refrigerant is stored in the gas-liquid separator 8, and the low-temperature low-pressure gas refrigerant enters the compressor 1 through the fourth heat exchanging part 12 to be compressed again, so that the refrigerant is recycled.

Referring again to fig. 1, the thermal management system may further include a second throttling device 20 and a sixth heat exchanger 30, wherein the sixth heat exchanger 30 is located within the channel of the air conditioning cabinet 13. Referring to fig. 3, the thermal management system of the present embodiment further includes a heating mode, in which an outlet of the compressor 1, the first heat exchanging portion 61, the sixth heat exchanger 30, the second throttling device 20, the third heat exchanging portion 11, the first heat exchanger 2, the gas-liquid separator 8, the fourth heat exchanging portion 12, and an inlet of the compressor 1 are communicated to form a refrigerant circulation loop.

Specifically, in the heating mode, the first heat exchanger 2 is used as an evaporator, and the sixth heat exchanger 30 is used as a condenser or an air cooler, and in the heating mode, the damper 14 is opened to allow air to flow through the sixth heat exchanger 30, and in the cooling mode, the damper 14 at the sixth heat exchanger 30 is closed to reduce the influence of the sixth heat exchanger 30. Referring to fig. 3, the compressor 1 compresses the low-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant flows out from an outlet of the compressor 1 and enters the sixth heat exchanger 30 through the first heat exchanging portion 61, the high-temperature high-pressure refrigerant exchanges heat with air flow in the sixth heat exchanger 30, the refrigerant releases heat, and hot air enters a channel of the air conditioning box 13 and is sent into the room to increase the indoor temperature. The refrigerant is condensed into a liquid or gas-liquid two-phase refrigerant by phase change. The refrigerant flows out of the sixth heat exchanger 30, enters the second throttling device 20, is cooled and depressurized to become low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant enters the first heat exchanger 2 through the third channel to absorb heat in external air flow and is phase-changed into low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant flowing out of the first heat exchanger 2 enters the gas-liquid separator 8, the gas-liquid separator 8 separates the returned refrigerant, the liquid part of the refrigerant is stored in the gas-liquid separator 8, and the low-temperature low-pressure gaseous refrigerant enters the compressor 1 through the fourth heat exchanging part 12 to be compressed again, so that the cyclic utilization of the refrigerant is realized.

The thermal management system of the present application further includes a first branch and a control valve 80, the first branch is connected in parallel with the third heat exchanger 6, the control valve 80 may be a water valve or other type of valve, referring to fig. 3, the control valve 80 is connected to the first branch, and the control valve 80 is connected in parallel with the third heat exchanger 6. Optionally, the control valve 80 may also be a three-way valve, a first port of the three-way valve is connected to the motor 51 through a pipeline, a second port of the three-way valve is connected to the second heat exchanging part 62 of the third heat exchanger 6 through a pipeline, and a third port of the three-way valve is connected to the first branch.

In the heating mode, when the motor generates excessive heat, the control valve 80 is opened, the pump device 52 is opened, and since the flow resistance of the coolant at the third heat exchanger 6 is large relative to the flow resistance at the control valve 80, only a small amount of the coolant flows toward the third heat exchanger 6, the coolant flow path of the coolant circuit includes: pump device 52- > motor 51 (or other functional component) - > control valve 80- > fourth heat exchanger 7. When the fourth heat exchanger 7 is located between the first fan 9 and the first heat exchanger 2 (the positions between the fourth heat exchanger 7, the first fan 9 and the first heat exchanger 2 are not limited, and are arranged in the direction of air flow approximately), the air flow generated by the first fan 9 can take away the heat of the cooling liquid of the fourth heat exchanger 7 more quickly, meanwhile, the air temperature rises, the temperature of the surrounding environment of the corresponding first heat exchanger 2 rises, and the low-temperature refrigerant in the first heat exchanger 2 can absorb the part of heat, so that the redundant heat generated by the motor can be absorbed by the refrigerant in the first heat exchanger 2 under the condition that the temperature of the external environment is lower in winter, and the heating capacity of the heat management system can be improved. On the other hand, in the winter heating mode, the first heat exchanger 2 is prone to frost in a low-temperature environment, and the control valve 80 may be opened to defrost the first heat exchanger 2.

Referring to fig. 4, the thermal management system may further include a heating and dehumidifying mode, which may be used when dehumidification is required in winter. In the heating and dehumidifying mode, the outlet of the compressor 1, the first heat exchanging portion 61, the sixth heat exchanger 30, the second throttling device 20, the third heat exchanging portion 11, the first heat exchanger 2, the gas-liquid separator 8, the fourth heat exchanging portion 12, and the inlet of the compressor 1 are communicated to form a first refrigerant circulation circuit, and the outlet of the compressor 1, the first heat exchanging portion 61, the sixth heat exchanger 30, the first throttling device 3, the second heat exchanger 4, the gas-liquid separator 8, the fourth heat exchanging portion 12, and the inlet of the compressor 1 are communicated to form a second refrigerant circulation circuit.

The first refrigerant circulation circuit is the refrigerant circulation circuit in the heating mode in the above embodiment. The second refrigerant circulation circuit is used for refrigerating the indoor space, and the working process of the second refrigerant circulation circuit is as follows: the compressor 1 compresses low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant flows out from an outlet of the compressor 1, enters the sixth heat exchanger 30 through the first heat exchanging part 61, heat is exchanged in the sixth heat exchanger 30, the refrigerant releases heat, the released heat is brought indoors by air flow, and the refrigerant is subjected to phase change and condensed into liquid or gas-liquid two-phase refrigerant. The refrigerant flows out of the sixth heat exchanger 30, one path of the refrigerant enters the second throttling device 20 to realize the heating function of the first refrigerant circulation loop, and the other path of the refrigerant enters the first throttling device 3 to be expanded, cooled and depressurized to become low-temperature and low-pressure refrigerant. The low-temperature low-pressure refrigerant enters the second heat exchanger 4, the low-temperature low-pressure refrigerant absorbs the heat of the air around the second heat exchanger 4 to reduce the temperature and the humidity of the air around the second heat exchanger 4, and the dehumidified cold air enters the channel of the air conditioning box 13 and is sent into the room to realize the indoor dehumidification function under the action of the air flow. The refrigerant changes phase and is mostly evaporated into low-temperature low-pressure gaseous refrigerant, the refrigerant flows into the gas-liquid separator 8, the gas-liquid separator 8 separates the returned refrigerant, the liquid part of the refrigerant is stored in the gas-liquid separator 8, and the low-temperature low-pressure gaseous refrigerant enters the compressor 1 to be compressed again, so that the refrigerant is recycled.

Referring again to fig. 1, the thermal management system may further include a four-way valve 40, the four-way valve 40 includes a first port 401, a second port 402, a third port 403, and a fourth port 404, the first heat exchanging portion 61 includes a first inlet 611 and a first outlet 612, the first heat exchanger 2 includes a first interface 21 and a second interface 22, the second heat exchanger 4 includes a third interface 41 and a fourth interface 42, the sixth heat exchanger 30 includes a fifth interface 301 and a sixth interface 302, and the third heat exchanging portion 11 includes a seventh interface 111 and an eighth interface 112. The first inlet 611 is connected to the outlet of the compressor 1, and the first outlet 612 is connected to the fifth port 301. The first port 401 is connected to the first outlet 612, and the first port 401 is also connected to the sixth port 302. The second port 402 is connected to the first port 21, the second port 22 is connected to the seventh port 111, the eighth port 112 is connected to one end of the second throttle device 20, and the third port 403 is connected to the other end of the second throttle device 20. The third port 403 is also connected to one end of the first throttle device 3, the third port 41 is connected to the other end of the first throttle device 3, the fourth port 42 and the fourth port 404 are connected to the inlet of the gas-liquid separator 8, and for a thermal management system in which the gas-liquid separator 8 is not provided, the fourth port 42 and the fourth port 404 are connected to the inlet of the compressor 1 via the fourth heat exchanging portion 12. The on-off of the branch is realized by controlling the four-way valve 40, so that the switching of different modes is realized. Of course, a three-way valve and a stop valve can be used to replace the four-way valve 40, so that the on-off of the corresponding branch can be controlled, and the switching of different modes can be realized.

Referring to fig. 1 to 4, the thermal management system may further include a stop valve 50, one end of the stop valve 50 is connected to the first outlet 612 and the fifth interface 301, and the other end of the stop valve 50 is connected to the first port 401 and the sixth interface 302. In this embodiment, in the cooling mode, the stop valve 50 is opened; in the heating mode or the heating dehumidification mode, the shut valve 50 is closed. The on-off of the branch is realized by controlling the stop valve 50, so that the switching of different modes is realized, the stop valve is simple in structure, and the on-off control is reliable.

Referring again to fig. 1 to 4, the thermal management system further includes a check valve 60, and the check valve 60 is connected in parallel with the second throttling device 20. Wherein, in the cooling mode, the check valve 60 is opened and the second throttling device 20 is closed; in the heating mode or the heating dehumidification mode, the check valve 60 is closed and the second throttle device 20 is opened. The on-off of the branch is realized by controlling the one-way valve 60 and the second throttling device 20, so that the switching of different modes is realized.

It should be noted that in the embodiment of the present application, the first throttling device 3 and the second throttling device 20 may function to reduce temperature and pressure in the thermal management system, and may generally include a throttling valve, a common thermal expansion valve or an electronic expansion valve, etc.

In addition, referring to fig. 1 again, the thermal management system may further include a second fan 70 located in the channel of the air conditioning box 13, and the second heat exchanger 4 and the sixth heat exchanger 30 are arranged along the airflow direction of the second fan 70, so that the second heat exchanger 4 and the sixth heat exchanger 30 share the fan, and the installation space is saved. Optionally, the second fan 70, the second heat exchanger 4 and the sixth heat exchanger 30 are arranged at intervals in a row or a column.

It should be noted that the thermal management system of the present embodiment can be applied to houses, vehicles, or other devices.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A heat management system is characterized by comprising a compressor (1), a first heat exchanger (2), a first throttling device (3), a second heat exchanger (4), a cooling liquid circulating flow path (5), a third heat exchanger (6), a fourth heat exchanger (7) and an air conditioning box (13), wherein the third heat exchanger (6) comprises a first heat exchanging part (61) and a second heat exchanging part (62) which can exchange heat;

the heat management system comprises a refrigeration mode, in the refrigeration mode, an outlet of the compressor (1), the first heat exchange part (61), the first heat exchanger (2), the first throttling device (3), the second heat exchanger (4) and an inlet of the compressor (1) are communicated to form a refrigerant circulation loop, the cooling liquid circulation flow path (5), the second heat exchange part (62) and the fourth heat exchanger (7) are communicated to form a cooling liquid loop, and cooling liquid in the second heat exchange part (62) can absorb heat of the refrigerant in the first heat exchange part (61);

the first heat exchanger (2) and the fourth heat exchanger (7) are located outside the air-conditioning box (13), and the second heat exchanger (4) is located inside the air-conditioning box (13).

2. The thermal management system according to claim 1, further comprising a first fan (9) located outside the air conditioning cabinet (13), the first heat exchanger (2) and the fourth heat exchanger (7) being arranged in the direction of the air flow of the first fan (9).

3. The thermal management system according to claim 1, further comprising a fifth heat exchanger (10), said fifth heat exchanger (10) comprising a third heat exchanging portion (11) and a fourth heat exchanging portion (12) capable of exchanging heat;

in the refrigeration mode, an outlet of the compressor (1), the first heat exchanging part (61), the first heat exchanger (2), the third heat exchanging part (11), the first throttling device (3), the second heat exchanger (4), the fourth heat exchanging part (12) and an inlet of the compressor (1) are communicated to form a refrigerant circulation loop.

4. A thermal management system according to claim 3, characterized in that it further comprises a second throttling device (20) and a sixth heat exchanger (30), said sixth heat exchanger (30) being located inside the air-conditioning box (13);

the heat management system further comprises a heating mode, in the heating mode, an outlet of the compressor (1), the first heat exchanging part (61), the sixth heat exchanger (30), the second throttling device (20), the third heat exchanging part (11), the first heat exchanger (2), the fourth heat exchanging part (12) and an inlet of the compressor (1) are communicated to form a refrigerant circulation loop.

5. The thermal management system of claim 4, further comprising a heating and dehumidification mode;

in the heating and dehumidifying mode, an outlet of the compressor (1), the first heat exchanging portion (61), the sixth heat exchanger (30), the second throttling device (20), the third heat exchanging portion (11), the first heat exchanger (2), the fourth heat exchanging portion (12) and an inlet of the compressor (1) are communicated to form a first refrigerant circulation loop, and an outlet of the compressor (1), the first heat exchanging portion (61), the sixth heat exchanger (30), the first throttling device (3), the second heat exchanger (4), the fourth heat exchanging portion (12) and an inlet of the compressor (1) are communicated to form a second refrigerant circulation loop.

6. The thermal management system of claim 4, further comprising a four-way valve (40), the four-way valve (40) comprising first, second, third, and fourth ports (404);

the first heat exchanging part (61) comprises a first inlet (611) and a first outlet (612), the first heat exchanger (2) comprises a first interface and a second interface, the second heat exchanger (4) comprises a third interface and a fourth interface, the sixth heat exchanger (30) comprises a fifth interface and a sixth interface, and the third heat exchanging part (11) comprises a seventh interface and an eighth interface;

the first inlet (611) is communicated with an outlet of the compressor (1), and the first outlet (612) is communicated with the fifth interface (301); the first port (401) is connected with the first outlet (612) and the sixth interface (302); the second port (402) is connected with the first port (21), the second port (22) is connected with the seventh port (111), the eighth port (112) is connected with one end of the second throttling device (20), the third port (403) is connected with the other end of the second throttling device (20) and is connected with one end of the first throttling device (3), the third port (41) is connected with the other end of the first throttling device (3), and the fourth port (42) and the fourth port (404) are connected with an inlet of the compressor (1) through the fourth heat exchanging part (12).

7. The thermal management system of claim 6, further comprising a shut-off valve (50), one end of the shut-off valve (50) being connected to the first outlet (612) and to the fifth port (301), and the other end of the shut-off valve (50) being connected to the first port (401) and to the sixth port (302).

8. The thermal management system of claim 4, further comprising a check valve (60), the check valve (60) being connected in parallel with the second flow restriction (20).

9. The thermal management system according to any of claims 1 to 8, further comprising a first branch arranged in parallel with said third heat exchanger (6) and a control valve (80), said control valve (80) being connected to the first branch.

10. Thermal management system according to any of claims 1 to 8, characterized in that said coolant circulation circuit (5) comprises an electric motor (51) and a pump device (52).