Thermal management system

Abstract

The present application provides a thermal management system, which includes a compressor, a first heat exchanger, a first throttling device, a second heat exchanger, a coolant circulation flow path, a third heat exchanger, and a fourth heat exchanger. The third heat exchanger includes a first heat exchange part and a second heat exchange part capable of performing heat exchange; the thermal management system includes a refrigeration mode. In the refrigeration mode, the outlet of the compressor, the first heat exchange part, the first heat exchanger, the first throttling device, the second heat exchanger, and the inlet of the compressor are connected to form a refrigerant circulation loop, and the coolant circulation flow path, the second heat exchange part, and the fourth heat exchanger are connected to form a coolant loop. The coolant in the second heat exchange part can absorb the heat of the refrigerant in the first heat exchange part; the first heat exchanger and the fourth heat exchanger are located outside the air conditioner box, and the second heat exchanger is located inside the air conditioner box. A third heat exchanger is provided at the outlet of the compressor. In the refrigeration mode, the third heat exchanger can bear a part of the heat exchange pressure of the outdoor heat exchanger.

Description

Technical Field

[0001] This application relates to the field of air conditioners, and particularly to a thermal management system. Background Art

[0002] The thermal management system can realize refrigeration, heating, ventilation and air purification of indoor air, providing a comfortable environment for indoor personnel. How to optimize the thermal management system to improve its performance is the current focus.

[0003] In related thermal management systems, in the refrigeration mode, the high-temperature and high-pressure refrigerant flows out from the 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 relatively high. When the outdoor ambient temperature is high, after the refrigerant exchanges heat with the external environment in the outdoor heat exchanger, the temperature of the refrigerant flowing out from the outdoor heat exchanger is still relatively high, resulting in poor refrigeration effect of the thermal management system. Summary of the Invention

[0004] This application provides a thermal management system to improve the refrigeration effect of the thermal management system in high-temperature environments.

[0005] Specifically, this application is implemented through the following technical solutions:

[0006] A thermal management system, the thermal management system includes a compressor, a first heat exchanger, a first throttling device, a second heat exchanger, a coolant circulation flow path, a third heat exchanger, a fourth heat exchanger and an air-conditioning box, and the third heat exchanger includes a first heat exchange part and a second heat exchange part capable of performing heat exchange;

[0007] The thermal management system includes a refrigeration mode. In the refrigeration mode, the outlet of the compressor, the first heat exchange part, the first heat exchanger, the first throttling device, the second heat exchanger and the inlet of the compressor are connected to form a refrigerant circulation loop, the coolant circulation flow path, the second heat exchange part and the fourth heat exchanger are connected to form a coolant loop, and the coolant in the second heat exchange part can absorb the heat of the refrigerant in the first heat exchange part;

[0008] 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.

[0009] Optionally, the thermal management system further includes a first fan located outside the air-conditioning box, and the first heat exchanger and the fourth heat exchanger are arranged along the air flow direction of the first fan.

[0010] Optionally, the thermal management system further includes a fifth heat exchanger, and the fifth heat exchanger includes a third heat exchange part and a fourth heat exchange part capable of performing heat exchange;

[0011] In the refrigeration mode, the outlet of the compressor, the first heat exchange part, the first heat exchanger, the third heat exchange part, the first throttling device, the second heat exchanger, the fourth heat exchange part, and the inlet of the compressor are connected to form a refrigerant circulation loop.

[0012] Optionally, the thermal management system further includes a second throttling device and a sixth heat exchanger, and the sixth heat exchanger is located in the air conditioning box;

[0013] The thermal management system further includes a heating mode. In the heating mode, the outlet of the compressor, the first heat exchange part, the sixth heat exchanger, the second throttling device, the third heat exchange part, the first heat exchanger, the fourth heat exchange part, and the inlet of the compressor are connected to form a refrigerant circulation loop.

[0014] Optionally, the thermal management system further includes a heating and dehumidifying mode;

[0015] In the heating and dehumidifying mode, the outlet of the compressor, the first heat exchange part, the sixth heat exchanger, the second throttling device, the third heat exchange part, the first heat exchanger, the fourth heat exchange part, and the inlet of the compressor are connected to form a first refrigerant circulation loop, and the outlet of the compressor, the first heat exchange part, the sixth heat exchanger, the first throttling device, the second heat exchanger, the fourth heat exchange part, and the inlet of the compressor are connected to form a second refrigerant circulation loop.

[0016] Optionally, the thermal management system further includes a four-way valve, and the four-way valve includes first, second, third, and fourth ports;

[0017] The first heat exchange part includes a first inlet and a first outlet, the first heat exchanger includes first and second interfaces, the second heat exchanger includes third and fourth interfaces, the sixth heat exchanger includes fifth and sixth interfaces, and the third heat exchange part includes seventh and eighth interfaces;

[0018] The first inlet is connected to the outlet of the compressor, and the first outlet is connected to the fifth interface; the first port is connected to the first outlet and is also connected to the sixth interface; the second port is connected to the first interface, the second interface is connected to the seventh interface, the eighth interface is connected to one end of the second throttling device, the third port is connected to the other end of the second throttling device and is also connected to one end of the first throttling device, the third interface is connected to the other end of the first throttling device, and the fourth interface and the fourth port are connected to the inlet of the compressor through the fourth heat exchange part.

[0019] Optionally, the thermal management system further includes a stop valve. One end of the stop valve is connected to the first outlet and the fifth interface, and the other end of the stop valve is connected to the first port and the sixth interface.

[0020] Optionally, the thermal management system further includes a check valve, and the check valve is connected in parallel with the second throttling device.

[0021] Optionally, the thermal management system further includes a first branch and a control valve. The first branch is arranged in parallel with the third heat exchanger, and the control valve is connected to the first branch.

[0022] Optionally, the coolant circulation path includes a motor and a pump device.

[0023] As can be seen from the above technical solutions, by arranging a third heat exchanger at the outlet of the compressor, in the refrigeration mode, the refrigerant flowing out of the outlet of the compressor will first pass through the third heat exchanger, and after being cooled by the third heat exchanger, it will flow into the first heat exchanger (i.e., the outdoor heat exchanger). The heat of the refrigerant circuit is brought to the external environment through the coolant circuit, bearing part of the heat exchange pressure of the outdoor heat exchanger, effectively solving the problem of insufficient heat exchange capacity of the outdoor heat exchanger in a high-temperature environment, so as to improve the refrigeration effect of the thermal management system.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Description of the Drawings

[0025] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0026] Figure 1 is a schematic structural diagram of a thermal management system provided by an embodiment of this application;

[0027] Figure 2 is Figure 1 a schematic diagram of the flow paths of the refrigerant and the coolant of the thermal management system in the refrigeration mode, where the thickened part indicates the flow path;

[0028] Figure 3 is Figure 1 a schematic diagram of the refrigerant flow path of the thermal management system in the heating mode, where the thickened part indicates the flow path;

[0029] Figure 4 is Figure 1 a schematic diagram of the refrigerant flow path of the thermal management system in the heating and dehumidifying mode, where the thickened part indicates the flow path;

[0030] Figure 5It is a schematic diagram of a partially cut-away structure of a third heat exchanger provided by an embodiment of the present application.

[0031] Reference numerals:

[0032] 1: Compressor; 2: First heat exchanger; 21: First interface; 22: Second interface; 3: First throttling device; 4: Second heat exchanger; 41: Third interface; 42: Fourth interface; 5: Coolant circulation flow path; 51: Motor; 52: Pump device; 6: Third heat exchanger; 61: First heat exchange part; 611: First inlet; 612: First outlet; 62: Second heat exchange part; 7: Fourth heat exchanger; 8: Gas-liquid separator; 9: First fan; 10: Fifth heat exchanger; 11: Third heat exchange part; 111: Seventh interface; 112: Eighth interface; 12: Fourth heat exchange part; 13: Air conditioning box; 14: Air damper; 15: First manifold; 16: Second manifold; 17: Heat exchange tube; 18: Heat dissipation part; 19: Housing; 20: Second throttling device; 30: Sixth heat exchanger; 301: Fifth interface; 302: Sixth interface; 40: Four-way valve; 401: First port; 402: Second port; 403: Third port; 404: Fourth port; 50: Stop valve; 60: Check valve; 70: Second fan; 80: Control valve. Detailed implementation manners

[0033] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0034] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the", and "said" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0036] The following will describe the thermal management system of the present application in detail with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0037] Combined with Figures 1 to 4 , a thermal management system provided by 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. Among them, the third heat exchanger 6 includes a first heat exchange part 61 and a second heat exchange part 62, and heat exchange can be performed between the first heat exchange part 61 and the second heat exchanger part. The first heat exchanger 2 and the fourth heat exchanger 7 of this embodiment are located outside the air conditioning box 13, and the second heat exchanger 4 is located in the indoor air inlet passage, and the indoor air inlet passage is the passage of the air conditioning box 13, that is, the second heat exchanger 4 is located inside the air conditioning box 13.

[0038] The thermal management system of this embodiment includes a refrigeration mode. Please refer to Figure 2 , in the refrigeration mode, the thermal management system includes two loops, namely a refrigerant circulation loop and a coolant circulation loop. Among them, the 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 the inlet of the compressor 1 are connected to form a refrigerant circulation loop. Optionally, the 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 the inlet of the compressor 1 are sequentially connected to form a refrigerant circulation loop.

[0039] The coolant circulation flow path 5, the second heat exchange part 62, and the fourth heat exchanger 7 are connected to form a coolant loop. Optionally, the coolant circulation flow path 5, the second heat exchange part 62, and the fourth heat exchanger 7 are sequentially connected to form a coolant loop. Of course, the above structures in the coolant loop can also be connected in other arrangement orders.

[0040] It should be noted that in the embodiment of the present application, sequential connection only illustrates the sequential relationship of the connection between each device, and other devices such as stop valves may be included between each device. In addition, the type of the coolant of the present application can be selected according to needs. For example, the coolant can be a substance capable of heat exchange such as water, oil, or a mixture of water and ethylene glycol, or other mixtures capable of heat exchange.

[0041] In this embodiment, the coolant in the second heat exchange part 62 can cool the refrigerant in the first heat exchange part 61.

[0042] Specifically, in the refrigeration mode, the first heat exchanger 2 is used as a condenser, and the second heat exchanger 4 is used as an evaporator. Refer to Figure 2, the compressor 1 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant flows out from the outlet of the compressor 1 and enters the first heat exchange part 61. The refrigerant in the first heat exchange part 61 exchanges heat with the coolant in the second heat exchange part 62. The refrigerant releases heat, and the released heat is carried by the coolant circuit to the fourth heat exchanger 7. The heated coolant exchanges heat with the outdoor air flow in the fourth heat exchanger 7. The coolant releases heat, and the released heat is carried by the air flow to the outdoor ambient air. The low-temperature coolant continues to circulate and be reused in the coolant circuit. After the refrigerant in the first heat exchange part 61 releases heat, the cooled refrigerant enters the first heat exchanger 2 and exchanges heat with the outdoor air flow in the first heat exchanger 2. The refrigerant releases heat, and the released heat is carried by the air flow to the outdoor ambient air. The refrigerant then undergoes a phase change and condenses into a liquid or a gas-liquid two-phase refrigerant. The refrigerant flows out of the first heat exchanger 2 and enters the first throttling device 3 to expand, and its temperature and pressure decrease to become a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the second heat exchanger 4. The low-temperature and low-pressure refrigerant absorbs the heat of the air around the second heat exchanger 4, reducing the temperature of the air around the second heat exchanger 4. Under the action of the air flow, the cold air enters the channel of the air conditioner box 13 and is sent into the room to reduce the indoor temperature. The refrigerant then undergoes a phase change and partially or completely evaporates into a low-temperature and low-pressure gaseous refrigerant, which flows back into the compressor 1 to achieve the recycling of the refrigerant.

[0043] A third heat exchanger 6 is arranged at the outlet of the compressor 1. In the refrigeration mode, the coolant in the second heat exchange part 62 cools the refrigerant in the first heat exchange part 61, which can reduce the temperature of the refrigerant in the outlet pipeline of the compressor 1. For example, the temperature of the refrigerant is reduced from 150 °C to 80 °C, so that 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 then exchanges heat with the external environment through the first heat exchanger 2 to further reduce the temperature of the refrigerant. For example, the temperature of the refrigerant is reduced from 80 °C to 47 °C. The refrigerant flowing out of the first heat exchanger 2 flows through the first throttling device 3 in sequence to reduce the pressure, flows through the second heat exchanger 4 to absorb heat and evaporate, and then flows back into the compressor 1 to achieve the recycling of the refrigerant.

[0044] In the heat management system of the embodiment of the present application, by arranging a third heat exchanger 6 at the outlet of the compressor 1, in the refrigeration mode, the refrigerant flowing out of the outlet of the compressor 1 will first pass through the third heat exchanger 6, and after being cooled by the third heat exchanger 6, it will flow into the first heat exchanger 2 (i.e., the outdoor heat exchanger). The heat of the refrigerant circuit is carried to the external environment through the coolant circuit, assuming part of the heat exchange pressure of the outdoor heat exchanger, and effectively solving the problem of insufficient capacity of the outdoor heat exchanger in a high-temperature environment (for example, between 35 °C and 50 °C), and improving the refrigeration capacity of the system.

[0045] Those of ordinary skill in the art can select the types of 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. For example, the first heat exchanger 2, the second heat exchanger 4, and the fourth heat exchanger 7 can be air-cooled heat exchangers, and the third heat exchanger 6 is a water-cooled heat exchanger. Refer to Figure 5 , the third heat exchanger 6 includes a first header 15, a second header 16, and a housing 19. The housing 19 has opposite ends, and the two ends of the housing 19 are respectively sealed and connected to the first header 15 and the second header 16 to enclose a heat exchange chamber. Heat exchange tubes 17 and heat dissipation members 18 are arranged in the third heat exchanger 6. The heat exchange tubes 17 and the heat dissipation members 18 are stacked alternately one by one 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 fixedly connected to the first header 15 and the second header 16. The first header 15 and the second header 16 have header chambers, and the header chambers are communicated with the lumen of the heat exchange tubes 17, so that the refrigerant can flow between the first header 15 and the second header 16. Inlet pipes and outlet pipes are also arranged on the opposite sides of the housing 19, so that the coolant can enter and exit the heat exchange chamber. When the coolant enters the heat exchange chamber, it exchanges heat with the refrigerant through the heat exchange tubes 17. The heat dissipation members 18 can be corrugated fins for improving the heat exchange efficiency, and the heat exchange tubes 17 can be microchannel flat tubes. Two connecting members are arranged on the second header 16, and the two connecting members are respectively used for connecting the refrigerant pipelines, so that the refrigerant can enter and exit the second header 16. It can be understood that those of ordinary skill 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. This application can also select the corresponding type of refrigerant according to the actual application and adopt a suitable heat exchanger. For example, the third heat exchanger 6 can adopt the structure as shown in Figure 5 , and this structure has the characteristic of high pressure resistance and is suitable for using media with high pressure resistance requirements such as carbon dioxide as the refrigerant.

[0046] In this embodiment, the thermal management system further includes a functional component that can generate heat. The coolant circulation path 5 includes the above-mentioned functional component, and the coolant circulation path 5 is used for dissipating heat from the functional component. Therefore, the coolant circuit of this embodiment can also undertake the heat dissipation of the functional components in the thermal management system, ensure the normal operation of the functional components, and thus effectively ensure the stable operation of the thermal management system in the refrigeration mode. Please refer to Figure 1, the functional components may include a motor 51. The coolant circuit can also undertake the heat dissipation of the motor 51 in the thermal management system to ensure the normal operation of the motor 51, thereby effectively ensuring the stable operation of the thermal management system in the refrigeration mode. It can be understood that the functional components may also include other components that can generate heat, such as a battery, etc. The thermal management system can recover and utilize the waste heat generated by the functional components. For example, in the winter heating mode, the waste heat of the functional components is used to improve the heating capacity of the thermal management system. In addition, please refer to again Figure 1 , the coolant circulation flow path 5 may further include a pump device 52. By setting the pump device 52, the circulation of the coolant in the coolant circuit can be driven. Optionally, in one embodiment, the coolant flow path of the coolant circuit includes: pump device 52 -> motor 51 (or other functional components) -> second heat exchange part 62 -> fourth heat exchanger 7.

[0047] Please refer to Figure 1 , the thermal management system may further include a first fan 9 located outside the air conditioning box 13. In this embodiment, the first heat exchanger 2 and the fourth heat exchanger 7 are arranged along the air flow direction of the first fan 9. By adopting this arrangement, the first heat exchanger 2 and the second heat exchanger 4 share a fan, saving installation space. 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 of the fourth heat exchanger 7 faster, accelerating the cooling effect of the coolant circuit and reducing the temperature of the refrigerant in the second heat exchange part 62 faster.

[0048] In addition, please refer to again Figure 1 , the inlet of the compressor 1 may also be connected to a gas-liquid separator 8 to separate the refrigerant flowing back into gas and liquid, store the liquid part therein in the gas-liquid separator 8, and the low-temperature and low-pressure gaseous refrigerant part enters the compressor 1 to be recompressed to realize the recycling of the refrigerant. Of course, for some new compressors, such as compressors with the function of storing liquid or gas-liquid separation function, the gas-liquid separator 8 may not be provided.

[0049] The following further elaborates on the structure of the thermal management system by setting a gas-liquid separator 8 at the inlet of the compressor 1.

[0050] Please refer to Figure 1 and Figure 2 , the thermal management system may further include a fifth heat exchanger 10, and the fifth heat exchanger 10 includes a third heat exchange part 11 and a fourth heat exchange part 12. Please refer to Figure 2, in the refrigeration mode, the outlet of the compressor 1, the first heat exchange part 61, the first heat exchanger 2, the third heat exchange part 11, the first throttling device 3, the second heat exchanger 4, the gas-liquid separator 8, the fourth heat exchange part 12, and the inlet of the compressor 1 are connected to form a refrigerant circulation loop. Specifically, in the refrigeration mode, the refrigerant flowing out of the first heat exchanger 2 passes through the third heat exchange part 11 again, and the refrigerant in the third heat exchange part 11 exchanges heat with the refrigerant in the fourth heat exchange part 12 (low-pressure side pipeline), further reducing the temperature of the refrigerant and further improving the refrigeration effect of the thermal management system. The refrigerant flowing out of the third heat exchange part 11 enters the first throttling device 3 to expand, and the temperature and pressure are reduced to become a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the second heat exchanger 4, and the low-temperature and low-pressure refrigerant absorbs the heat of the air around the second heat exchanger 4, reducing the temperature of the air around the second heat exchanger 4. Under the action of the air flow, the cold air enters the channel of the air conditioner box 13 and is sent into the room to reduce the room temperature. The refrigerant then undergoes a phase change and most of it evaporates into a low-temperature and low-pressure gaseous refrigerant, flowing into the gas-liquid separator 8. The gas-liquid separator 8 separates the refluxed refrigerant, stores the liquid part therein, and the low-temperature and low-pressure gaseous refrigerant part enters the compressor 1 through the fourth heat exchange part 12 to be recompressed, realizing the recycling of the refrigerant.

[0051] Please refer to again Figure 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 in the channel of the air conditioner box 13. Please refer to Figure 3 , the thermal management system of this embodiment further includes a heating mode. In the heating mode, the outlet of the compressor 1, the first heat exchange part 61, the sixth heat exchanger 30, the second throttling device 20, the third heat exchange part 11, the first heat exchanger 2, the gas-liquid separator 8, the fourth heat exchange part 12, and the inlet of the compressor 1 are connected to form a refrigerant circulation loop.

[0052] 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. In the heating mode, the air damper 14 is opened so that air can flow through the sixth heat exchanger 30. It should be noted that in the refrigeration mode, the air damper 14 at the sixth heat exchanger 30 is in a closed state to reduce the influence of the sixth heat exchanger 30. Please refer to Figure 3, the compressor 1 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant flows out from the outlet of the compressor 1, enters the sixth heat exchanger 30 through the first heat exchange part 61. The high-temperature and high-pressure refrigerant exchanges heat with the air flow in the sixth heat exchanger 30. The refrigerant releases heat, and the hot air enters the channel of the air conditioner box 13 and is sent into the room to increase the room temperature. The refrigerant then undergoes a phase change and condenses into a liquid or a liquid-gas two-phase refrigerant. The refrigerant flows out of the sixth heat exchanger 30, enters the second throttling device 20, is cooled and depressurized to become a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the first heat exchanger 2 through the third channel, absorbs the heat in the external air flow, and undergoes a phase change into a 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 refluxed refrigerant, stores the liquid part therein, and the low-temperature and low-pressure gaseous refrigerant part enters the compressor 1 through the fourth heat exchange part 12 for re-compression to achieve the recycling of the refrigerant.

[0053] The thermal management system of the present application further includes a first branch and a control valve 80. The first branch is arranged in parallel with the third heat exchanger 6. The control valve 80 can be a water valve or other types of valves. Refer to Figure 3 , the control valve 80 is connected to the first branch, and the control valve 80 is arranged in parallel with the third heat exchanger 6. Optionally, the control valve 80 can also be a three-way valve. The first port of the three-way valve is connected to the motor 51 through a pipeline, the second port of the three-way valve is connected to the second heat exchange part 62 of the third heat exchanger 6 through a pipeline, and the third port of the three-way valve is connected to the first branch.

[0054] In the heating mode, when the motor generates excess heat, the control valve 80 is opened and the pump device 52 is turned on. Since the flow resistance of the coolant at the third heat exchanger 6 is relatively large compared to that at the control valve 80, only a small amount of coolant flows to the third heat exchanger 6. The coolant flow path of the coolant loop includes: pump device 52 -> motor 51 (or other functional components) -> control valve 80 -> fourth heat exchanger 7. The excess heat generated by the motor is released to the external environment through the 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 of the fourth heat exchanger 7, the first fan 9, and the first heat exchanger 2 are not limited, and they are arranged roughly in the air flow direction), the air flow generated by the first fan 9 can more quickly take away the heat of the coolant in the fourth heat exchanger 7, and at the same time the air temperature rises. Correspondingly, the temperature of the surrounding environment of the first heat exchanger 2 rises, and the low-temperature refrigerant in the first heat exchanger 2 can absorb this part of the heat. In this way, in the case of a relatively low external environment temperature in winter, the excess heat generated by the motor will be absorbed by the refrigerant in the first heat exchanger 2, which can increase the heating capacity of the thermal management system. On the other hand, in the heating mode in winter, the first heat exchanger 2 is prone to frosting at low temperatures, and the control valve 80 can be opened to defrost the first heat exchanger 2.

[0055] Please refer to Figure 4 , the thermal management system may further include a heating and dehumidifying mode, which can be used when dehumidification is required in winter. In the heating and dehumidifying mode, the outlet of the compressor 1, the first heat exchange part 61, the sixth heat exchanger 30, the second throttling device 20, the third heat exchange part 11, the first heat exchanger 2, the gas-liquid separator 8, the fourth heat exchange part 12, and the inlet of the compressor 1 are connected to form a first refrigerant circulation loop, and the outlet of the compressor 1, the first heat exchange part 61, the sixth heat exchanger 30, the first throttling device 3, the second heat exchanger 4, the gas-liquid separator 8, the fourth heat exchange part 12, and the inlet of the compressor 1 are connected to form a second refrigerant circulation loop.

[0056] Among them, the first refrigerant circulation loop is the refrigerant circulation loop in the heating mode in the above-mentioned embodiment. The second refrigerant circulation loop is used for indoor refrigeration. The working process of the second refrigerant circulation loop is as follows: The compressor 1 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant flows out from the outlet of the compressor 1, enters the sixth heat exchanger 30 through the first heat exchange part 61, and exchanges heat in the sixth heat exchanger 30. The refrigerant releases heat, and the released heat is carried by the air flow to the indoor, and the refrigerant then undergoes a phase change and condenses into a liquid or a gas-liquid two-phase refrigerant. The refrigerant flows out of the sixth heat exchanger 30, one way enters the second throttling device 20 to realize the heating function of the first refrigerant circulation loop, and the other way enters the first throttling device 3 to expand, reduce the temperature and pressure to become a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the second heat exchanger 4, and the low-temperature and low-pressure refrigerant absorbs the heat of the air around the second heat exchanger 4 to reduce the temperature and humidity of the air around the second heat exchanger 4. Under the action of the air flow, the dehumidified cold air enters the channel of the air conditioner box 13 and is sent into the room to realize the dehumidification function of the room. The refrigerant then undergoes a phase change and mostly evaporates into a low-temperature and low-pressure gaseous refrigerant, flows into the gas-liquid separator 8, and the gas-liquid separator 8 separates the refluxed refrigerant, stores the liquid part therein in the gas-liquid separator 8, and the low-temperature and low-pressure gaseous refrigerant part enters the compressor 1 to be recompressed to realize the recycling of the refrigerant.

[0057] Please refer to again Figure 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 exchange part 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. The third heat exchange part 11 includes a seventh interface 111 and an eighth interface 112. Among them, the first inlet 611 communicates with the outlet of the compressor 1, and the first outlet 612 communicates with the fifth interface 301. The first port 401 is connected to the first outlet 612, and the first port 401 is also connected to the sixth interface 302. The second port 402 is connected to the first interface 21, the second interface 22 is connected to the seventh interface 111, the eighth interface 112 is connected to one end of the second throttling device 20, and the third port 403 is connected to the other end of the second throttling device 20. And the third port 403 is also connected to one end of the first throttling device 3, the third interface 41 is connected to the other end of the first throttling device 3, the fourth interface 42 and the fourth port 404 are connected to the inlet of the gas-liquid separator 8. For a thermal management system without a gas-liquid separator 8, the fourth interface 42 and the fourth port 404 are connected to the inlet of the compressor 1 through the fourth heat exchange part 12. By controlling the four-way valve 40, the on-off of the corresponding branch is realized, so as to realize the switching of different modes. Of course, a three-way valve or a globe valve can also be used to replace the four-way valve 40, so as to control the on-off of the corresponding branch and realize the switching of different modes.

[0058] Please combine with Figures 1 to 4 , the thermal management system may further include a globe valve 50. One end of the globe valve 50 is connected to the first outlet 612 and is also connected to the fifth interface 301. The other end of the globe valve 50 is connected to the first port 401 and is also connected to the sixth interface 302. In this embodiment, in the refrigeration mode, the globe valve 50 is opened; in the heating mode or the heating and dehumidification mode, the globe valve 50 is closed. By controlling the globe valve 50, the on-off of the corresponding branch is realized, so as to realize the switching of different modes. The globe valve has a simple structure and reliable on-off control.

[0059] Please combine with again Figures 1 to 4 , the thermal management system further includes a check valve 60. The check valve 60 is connected in parallel with the second throttling device 20. Among them, in the refrigeration mode, the check valve 60 is opened and the second throttling device 20 is closed; in the heating mode or the heating and dehumidification mode, the check valve 60 is closed and the second throttling device 20 is opened. By controlling the check valve 60 and the second throttling device 20, the on-off of the corresponding branch is realized, so as to realize the switching of different modes.

[0060] It should be noted that in the embodiments of the present application, the first throttling device 3 and the second throttling device 20 can play a role in reducing temperature and pressure in the thermal management system, and generally may include a throttle valve, an ordinary thermostatic expansion valve, an electronic expansion valve, etc.

[0061] In addition, please refer to Figure 1 again. The thermal management system may further include a second fan 70 located in the passage of the air conditioning box 13. The second heat exchanger 4 and the sixth heat exchanger 30 are arranged along the air flow direction of the second fan 70. By adopting this arrangement, the second heat exchanger 4 and the sixth heat exchanger 30 share the fan, saving the installation space. 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.

[0062] It is worth mentioning that the thermal management system of this embodiment can be applied to houses, vehicles or other devices.

[0063] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A thermal management system, characterized in that, the thermal management system includes 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), and the third heat exchanger (6) includes a first heat exchange part (61) and a second heat exchange part (62) capable of performing heat exchange; the thermal management system includes a refrigeration mode, in which, at the 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 the inlet of the compressor (1) are connected to form a refrigerant circulation loop, the coolant circulation flow path (5), the second heat exchange part (62) and the fourth heat exchanger (7) are connected to form a coolant loop, and the coolant in the second heat exchange part (62) can absorb the 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); the thermal management system further includes a second throttling device (20) and a sixth heat exchanger (30), and the sixth heat exchanger (30) is located inside the air conditioning box (13); the thermal management system further includes a heating mode, in which, at the outlet of the compressor (1), the first heat exchange part (61), the sixth heat exchanger (30), the second throttling device (20), the first heat exchanger (2), and the inlet of the compressor (1) are connected to form a refrigerant circulation loop; the thermal management system further includes a first branch and a control valve (80), the first branch is arranged in parallel with the third heat exchanger (6), and the control valve (80) is connected to the first branch; the coolant circulation flow path (5) includes a motor (51) and a pump device (52), and in the heating mode, the control valve (80) can be opened and the pump device (52) can be started.

2. The thermal management system according to claim 1, characterized in that, the thermal management system further includes a first fan (9) located outside the air conditioning box (13), and the first heat exchanger (2) and the fourth heat exchanger (7) are arranged along the air flow direction of the first fan (9).

3. The thermal management system according to claim 1, characterized in that, the thermal management system further includes a fifth heat exchanger (10), and the fifth heat exchanger (10) includes a third heat exchange part (11) and a fourth heat exchange part (12) capable of performing heat exchange; in the refrigeration mode, at the outlet of the compressor (1), the first heat exchange part (61), the first heat exchanger (2), the third heat exchange part (11), the first throttling device (3), the second heat exchanger (4), the fourth heat exchange part (12), and the inlet of the compressor (1) are connected to form a refrigerant circulation loop.

4. The thermal management system according to claim 3, characterized in that, The thermal management system further includes a second throttling device (20) and a sixth heat exchanger (30), and the sixth heat exchanger (30) is located inside the air handling unit (13); The thermal management system further includes a heating mode. In the heating mode, an outlet of the compressor (1), the first heat exchange part (61), the sixth heat exchanger (30), the second throttling device (20), the third heat exchange part (11), the first heat exchanger (2), the fourth heat exchange part (12), and an inlet of the compressor (1) are connected to form a refrigerant circulation loop.

5. The thermal management system according to claim 4, characterized in that the thermal management system further includes a heating and dehumidifying mode; In the heating and dehumidifying mode, an outlet of the compressor (1), the first heat exchange part (61), the sixth heat exchanger (30), the second throttling device (20), the third heat exchange part (11), the first heat exchanger (2), the fourth heat exchange part (12), and an inlet of the compressor (1) are connected to form a first refrigerant circulation loop, and an outlet of the compressor (1), the first heat exchange part (61), the sixth heat exchanger (30), the first throttling device (3), the second heat exchanger (4), the fourth heat exchange part (12), and an inlet of the compressor (1) are connected to form a second refrigerant circulation loop.

6. The thermal management system according to claim 4, characterized in that the thermal management system further includes a four-way valve (40), and the four-way valve (40) includes first, second, third, and fourth ports (404); The first heat exchange part (61) includes a first inlet (611) and a first outlet (612), the first heat exchanger (2) includes first and second interfaces, the second heat exchanger (4) includes third and fourth interfaces, the sixth heat exchanger (30) includes fifth and sixth interfaces, and the third heat exchange part (11) includes seventh and eighth interfaces; The first inlet (611) is connected to the outlet of the compressor (1), and the first outlet (612) is connected to the fifth interface (301); the first port (401) is connected to the first outlet (612) and is connected to the sixth interface (302); the second port (402) is connected to the first interface (21), the second interface (22) is connected to the seventh interface (111), the eighth interface (112) is connected to one end of the second throttling device (20), the third port (403) is connected to the other end of the second throttling device (20) and is connected to one end of the first throttling device (3), the third interface (41) is connected to the other end of the first throttling device (3), and the fourth interface (42), the fourth port (404) are connected to the inlet of the compressor (1) via the fourth heat exchange part (12).

7. The thermal management system according to claim 6, characterized in that The heat management system further includes 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).

8. The heat management system according to claim 4, wherein, the heat management system further includes a check valve (60), and the check valve (60) is connected in parallel with the second throttling device (20).

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