阅读说明：本技术 热管理系统 (Thermal management system ) 是由 不公告发明人 于 2020-04-24 设计创作，主要内容包括：本发明公开一种热管理系统,该热管理系统的第一换热器的第一流道与压缩机的出口连通,第一换热器的第一流道能够与两个并行设置的第二换热器所在支路和第三换热器所在支路连通,第一换热器的第二流道能够与第三换热器所在支路和第四换热器所在支路连通,该热管理系统的结构相对简单。(The invention discloses a heat management system, wherein a first flow channel of a first heat exchanger of the heat management system is communicated with an outlet of a compressor, the first flow channel of the first heat exchanger can be communicated with a branch where two second heat exchangers arranged in parallel and a branch where a third heat exchanger is arranged, a second flow channel of the first heat exchanger can be communicated with a branch where the third heat exchanger is arranged and a branch where a fourth heat exchanger is arranged, and the structure of the heat management system is relatively simple.)

1. A heat management system comprises a refrigerant system and a cooling liquid system, wherein refrigerant of the refrigerant system and cooling liquid of the cooling liquid system are isolated from each other and do not circulate, the heat management system comprises a first heat exchanger, the first heat exchanger comprises two flow channels, the refrigerant system comprises a compressor, a throttling element, a first flow channel of the first heat exchanger, a second heat exchanger and a third heat exchanger, a branch where the second heat exchanger is located and a branch where the third heat exchanger is located are arranged in parallel, the compressor is communicated with the first flow channel of the first heat exchanger, and the first flow channel of the first heat exchanger can be communicated with the branch where the second heat exchanger is located and/or the branch where the third heat exchanger is located;

the cooling liquid system comprises a first cooling liquid system, the first cooling liquid system comprises a second runner of the first heat exchanger, at least one first pump, a fourth heat exchanger and a fifth heat exchanger, the first cooling liquid system can exchange heat with the refrigerant system at the first heat exchanger, a branch where the fourth heat exchanger is located and a branch where the fifth heat exchanger is located are arranged in parallel, the second runner of the first heat exchanger can be communicated with the fourth heat exchanger and/or the fifth heat exchanger, and the first pump can drive the cooling liquid of the first cooling liquid system to flow.

2. The thermal management system of claim 1, wherein the second heat exchanger and the fifth heat exchanger are disposed in an air conditioning box of a vehicle;

the heat management system comprises a heating mode, a cooling mode and a dehumidifying mode; in a heating mode of the thermal management system, the second flow passage of the first heat exchanger is communicated with the fifth heat exchanger, and the first flow passage of the first heat exchanger is communicated with the third heat exchanger;

in a cooling mode of the thermal management system, the second flow passage of the first heat exchanger is communicated with the fourth heat exchanger, and the first flow passage of the first heat exchanger is communicated with the second heat exchanger;

in a dehumidification mode of the thermal management system, the second channel of the first heat exchanger is communicated with the fifth heat exchanger, the second channel of the first heat exchanger is communicated with the fourth heat exchanger or the first channel of the first heat exchanger is communicated with the third heat exchanger, and the first channel of the first heat exchanger is communicated with the second heat exchanger.

3. The thermal management system of claim 1 or 2, wherein the refrigerant system comprises an accumulator disposed between the first flow passage of the first heat exchanger and the throttle valve; the heat management system comprises a sixth heat exchanger, the sixth heat exchanger comprises two flow channels, the refrigerant system further comprises a first flow channel of the sixth heat exchanger, a branch where the first flow channel of the sixth heat exchanger is located is arranged in parallel with a branch where the second heat exchanger is located and a branch where the third heat exchanger is located, and the compressor can be communicated with the first flow channel of the sixth heat exchanger through the first flow channel of the first heat exchanger;

the coolant system includes a second coolant system including at least one second pump, a battery cooler, and a second flow path of the sixth heat exchanger.

4. The thermal management system of claim 3, wherein said second coolant system includes two of said second pumps, said second coolant system including a first branch including a second flow path of one of said second pumps, a battery cooler, and said sixth heat exchanger, and a second branch including a motor cooler in series communication with the other of said second pumps, the other of said second pumps; the second cooling liquid system further comprises a four-way reversing valve, the four-way reversing valve comprises four ports, a first port and a second port of the four-way reversing valve are respectively communicated with the two ports of the first branch, and a third port and a fourth port of the four-way reversing valve are respectively communicated with the two ports of the second branch;

the second cooling liquid system comprises a first working state, in the first working state, a first port of the four-way reversing valve is communicated with a second port, a third port of the four-way reversing valve is communicated with a fourth port, and the first branch and the second branch form two mutually independent loops; in the second working state, the first port of the four-way reversing valve is communicated with the third port, the second port of the four-way reversing valve is communicated with the fourth port, and the first branch and the second branch are connected in series to form a loop.

5. The thermal management system of claim 4, wherein the coolant system further comprises a first bypass line and a second bypass line, one end of the first bypass line and one end of the second bypass line are in communication with the first coolant system, the other end of the first bypass line and the other end of the second bypass line are in communication with the second coolant system, and the second coolant system is capable of being in communication with the first coolant system through the first bypass line and the second bypass line.

6. The thermal management system of claim 5, wherein the coolant system comprises a first three-way valve comprising three ports, the first port of the second branch, the third port of the four-way reversing valve, and the first port of the first bypass line being in communication with the three ports of the first three-way valve, respectively; the second port of the first bypass pipeline is communicated with one port of the fourth heat exchanger or one port of the fifth heat exchanger or a second flow channel of the first heat exchanger; and the second port of the second branch is communicated with one port of the fourth heat exchanger or one port of the fifth heat exchanger or a second flow channel of the first heat exchanger through the second bypass pipeline.

7. The thermal management system of claim 5, wherein said coolant system comprises a four-way valve, said four-way valve comprising four ports, said second flow path of said first heat exchanger, said fourth heat exchanger, said fifth heat exchanger, and said first bypass line communicating with said four ports of said first four-way valve, respectively;

the second flow channel of the first heat exchanger can be communicated with at least one of the branch where the fourth heat exchanger is located, the branch where the fifth heat exchanger is located and the first bypass pipeline through the four-way valve;

and/or the second cooling liquid system can be communicated with at least one of the branch where the fourth heat exchanger is located, the branch where the fifth heat exchanger is located and the second flow passage of the first heat exchanger through the four-way valve.

8. The thermal management system of any of claims 5-7, comprising a first cooling mode in which the second flow path of the first heat exchanger is in communication with the branch of the fifth heat exchanger and/or the branch of the fourth heat exchanger, the third throttling element being open, the second pump being open;

in the second cooling mode, the compressor is closed, the second cooling liquid system is communicated with the branch where the fourth heat exchanger is located and/or the branch where the fifth heat exchanger is located through the first bypass pipeline and the second bypass pipeline, and the second pump is started;

the heat management system further comprises a heating mode, in the heating mode, the compressor is started, the second throttling element is started, the first throttling element and the third throttling element are closed, and the second flow passage of the first heat exchanger is communicated with the second cooling liquid system through the first bypass pipeline and the second bypass pipeline.

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of thermal management.

[ background of the invention ]

Some devices, such as vehicles, have thermal management systems that include both heating and cooling functions, such systems tend to be relatively complex, and thus a relatively simple thermal management system needs to be designed to meet the needs of the respective device.

[ summary of the invention ]

It is an object of the present invention to provide a relatively simple thermal management system.

A heat management system comprises a refrigerant system and a cooling liquid system, wherein refrigerant of the refrigerant system and cooling liquid of the cooling liquid system are isolated from each other and do not circulate, the heat management system comprises a first heat exchanger, the first heat exchanger comprises two flow channels, the refrigerant system comprises a compressor, a throttling element, a first flow channel of the first heat exchanger, a second heat exchanger and a third heat exchanger, a branch where the second heat exchanger is located and a branch where the third heat exchanger is located are arranged in parallel, the compressor is communicated with the first flow channel of the first heat exchanger, and the first flow channel of the first heat exchanger can be communicated with the branch where the second heat exchanger is located and/or the branch where the third heat exchanger is located;

the cooling liquid system comprises a first cooling liquid system, the first cooling liquid system comprises a second runner of the first heat exchanger, at least one first pump, a fourth heat exchanger and a fifth heat exchanger, the first cooling liquid system can exchange heat with the refrigerant system at the first heat exchanger, a branch where the fourth heat exchanger is located and a branch where the fifth heat exchanger is located are arranged in parallel, the second runner of the first heat exchanger can be communicated with the fourth heat exchanger and/or the fifth heat exchanger, and the first pump can drive the cooling liquid of the first cooling liquid system to flow.

The embodiment provides a heat management system, a first flow channel of a first heat exchanger of the heat management system is communicated with an outlet of a compressor, the first flow channel of the first heat exchanger can be communicated with a branch where two second heat exchangers are arranged in parallel and a branch where a third heat exchanger is arranged, a second flow channel of the first heat exchanger can be communicated with a branch where the third heat exchanger is arranged and a branch where a fourth heat exchanger is arranged, and the structure of the heat management system is relatively simple.

[ description of the drawings ]

FIG. 1 is a schematic connection diagram of a first embodiment of the thermal management system of the present invention;

FIG. 2 is a schematic connection diagram of a second embodiment of the thermal management system of the present invention;

FIG. 3 is a schematic connection diagram of a third embodiment of the thermal management system of the present invention;

FIG. 4 is a schematic diagram of the connection of a fourth embodiment of the thermal management system of the present invention.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and specific examples. One embodiment of the present invention provides a thermal management system, which may be applied to a home thermal management system or a commercial thermal management or a vehicular thermal management system, and takes the vehicular thermal management system as an example to describe one technical solution of the present invention. Referring to fig. 1, the thermal management system includes a refrigerant system and a coolant system, the refrigerant of the refrigerant system and the coolant of the coolant system are isolated from each other and do not flow through each other, the thermal management system includes a first heat exchanger 20, the first heat exchanger 20 includes two flow passages, a first flow passage and a second flow passage, wherein the first flow passage of the first heat exchanger 20 is a refrigerant flow passage, the second flow passage of the first heat exchanger 20 is a coolant flow passage, and when the thermal management system operates, the refrigerant of the refrigerant system and the coolant of the coolant system can exchange heat in the first heat exchanger 20. The refrigerant system comprises a compressor 10, a throttling element, a first flow channel of a first heat exchanger 20, a first cooling branch and a second cooling branch, wherein the first cooling branch and the second cooling branch are arranged in parallel, specifically, an outlet of the compressor 10 is communicated with an inlet of the first flow channel of the first heat exchanger 20, an outlet of the first flow channel of the first heat exchanger 20 can be communicated with an inlet of the compressor 10 through the first cooling branch, an outlet of the first flow channel of the first heat exchanger 20 can also be communicated with an inlet of the compressor 10 through the second cooling branch, or the compressor 10, the first flow channel of the first heat exchanger 20 and the first cooling branch can form a circulation loop, or the compressor 10, the first flow channel of the first heat exchanger 20 and the second cooling branch can also form a circulation loop, or the first flow channel of the compressor 10 and the first heat exchanger 20 and the second cooling branch can also form a circulation loop, The first cooling branch and the second cooling branch can form a circulation loop. In addition, the refrigerant system may also include at least one check valve, for example, the first cooling branch may be communicated with the inlet of the compressor through the check valve, or the second cooling branch may be communicated with the inlet of the compressor through the check valve, and the refrigerant system is provided with the check valve to facilitate preventing the refrigerant from flowing back to the first cooling branch and the second cooling branch. In a specific embodiment, the throttling element comprises a first throttling element 52 and a second throttling element 51, the first cooling branch comprises a first throttling element 52 and a second heat exchanger 32, the first throttling element 52 and the second heat exchanger 32 are arranged in series, and further, the first flow passage of the first heat exchanger 20 is communicated with the second heat exchanger 32 through the first throttling element 52. The second cooling branch comprises a second throttling element 51 and a third heat exchanger 31, the second throttling element 51 and the third heat exchanger 31 are arranged in series, and further, a first flow passage of the second heat exchanger 31 is communicated with the third heat exchanger 31 through the second throttling element 51. In another specific embodiment, the throttling element is only one, the refrigerant system further comprises a valve element, which may be a three-way valve or a combination of two shutoff valves, and the first flow path of the first heat exchanger is communicated with the valve element through the throttling element and then communicated with the first cooling branch and the second cooling branch through the valve element, that is, the throttled refrigerant can be communicated with the first cooling branch and the second cooling branch through the valve element, in this case, the first cooling branch comprises the second heat exchanger 32, and the second cooling branch comprises the third heat exchanger 31.

The cooling liquid system comprises a first cooling liquid system, the first cooling liquid system comprises a second flow channel of the first heat exchanger 20, a first pump 204, a fourth heat exchanger 201 and a fifth heat exchanger 202, wherein the first pump 204 is communicated with the second flow channel of the first heat exchanger 20 in series, a branch where the fourth heat exchanger 201 is located and a branch where the fifth heat exchanger 202 is located are arranged in parallel, the parallel arrangement refers to a flow path of the cooling liquid and not a space arrangement of the heat exchangers, and the cooling liquid discharged by the second flow channel of the first heat exchanger 20 can flow into the branch where the fourth heat exchanger 201 is located or the branch where the fifth heat exchanger 202 is located or simultaneously flow into the branch where the fourth heat exchanger is located and the branch where the fifth heat exchanger is located. Of course, the first cooling liquid system may also include two first pumps 204, and the two first pumps 204 are respectively disposed in the first branch and the second branch, that is, one first pump is in serial communication with the fourth heat exchanger 201, and the other first pump is in serial communication with the fifth heat exchanger 202, and the two first pumps 204 are disposed, so as to conveniently and independently control the flow of the first cooling liquid. In order to control the flow direction of the cooling liquid flowing out from the second flow channel of the first heat exchanger 20, the first cooling liquid system further comprises a first three-way valve 203, and the branch of the fourth heat exchanger 201 and the branch of the fifth heat exchanger 202 can be communicated with the second flow channel of the first heat exchanger through the first three-way valve 203.

In the vehicle thermal management system, the second heat exchanger 32 and the fifth heat exchanger 202 are disposed in an air conditioning box of the vehicle, and are used for regulating the temperature in the vehicle. During operation of the thermal management system, the refrigerant in the second heat exchanger 32 exchanges heat with air in the air conditioning cabinet to lower the temperature of the airflow in the air conditioning cabinet, and the coolant in the fifth heat exchanger 202 exchanges heat with air in the air conditioning cabinet to raise the temperature of the airflow in the air conditioning cabinet. In this embodiment, a temperature damper may not be provided in the air conditioning box of the vehicle, and when the heat exchange of the fifth heat exchanger 202 is not required to increase the temperature, the first three-way valve 203 may be adjusted so that the coolant discharged from the first heat exchanger 20 does not flow to the fifth heat exchanger, or the first pump of the branch in which the fifth heat exchanger 202 is located may be turned off. Of course, temperature dampers may be provided if necessary, and will not be described in detail. The fourth heat exchanger 201 and the third heat exchanger 31 are disposed outside the vehicle air conditioning box so that the fourth heat exchanger 201 and the third heat exchanger 31 exchange heat with ambient air.

In this embodiment, the thermal management system includes a heating mode, a cooling mode, and a dehumidification mode, in the heating mode of the thermal management system, the second flow path of the first heat exchanger 20 is communicated with the fifth heat exchanger 202, the first flow path of the first heat exchanger is communicated with the second cooling branch, the second throttling element 51 is opened, the first flow path of the first heat exchanger 20 is not communicated with the first cooling branch, and the first throttling element 52 is not opened. When the thermal management system works in a heating mode, the high-temperature and high-pressure refrigerant releases heat to the cooling liquid of the first cooling liquid system in the first heat exchanger, and the relatively low-temperature and high-pressure refrigerant is throttled and depressurized in the second throttling element 51, absorbs heat in ambient air in the third heat exchanger 31, and then enters the inlet of the compressor 10. After the temperature is raised, the cooling liquid enters the fifth heat exchanger 202 and exchanges heat with the airflow in the air conditioning box to raise the temperature of the airflow entering the vehicle.

In the cooling mode of the thermal management system, the second flow path of the first heat exchanger 20 is in communication with the fourth heat exchanger 201, and the first flow path of the first heat exchanger is in communication with the first cooling branch, that is, the first flow path of the first heat exchanger is in communication with the second heat exchanger 32 through the first throttling element 52. When the thermal management system works in a cooling mode, the high-temperature and high-pressure refrigerant releases heat to the cooling liquid of the first cooling liquid system in the first heat exchanger, the relatively low-temperature and high-pressure refrigerant is throttled and depressurized in the first throttling element 52 and then absorbs the heat of the air in the air conditioning box in the second heat exchanger 32 to reduce the temperature of the air flow entering the vehicle room, and then the air flow enters the inlet of the compressor, and the cooling liquid with the raised temperature enters the fourth heat exchanger 201 to exchange heat with the ambient air and release the heat to the ambient air.

The dehumidification mode of the thermal management system includes a first dehumidification mode, a second dehumidification mode, and a third dehumidification mode. In the first dehumidification mode of the thermal management system, the second flow path of the first heat exchanger 20 is in communication with the fifth heat exchanger 202, the second flow path of the first heat exchanger 20 is in communication with the fourth heat exchanger 201, and the first flow path of the first heat exchanger 20 is in communication with the first cooling branch, that is, the first flow path of the first heat exchanger 20 is in communication with the second heat exchanger 32 through the first throttling element 52. In the first dehumidification mode of the thermal management system, the heat of the thermal management system is released through the fourth heat exchanger 201 and the fifth heat exchanger 202, and the cold of the thermal management system is released through the second heat exchanger 32. In the second dehumidification mode of the thermal management system, the second flow channel of the first heat exchanger 20 is communicated with the fifth heat exchanger 202, the second flow channel of the first heat exchanger 20 is not communicated with the fourth heat exchanger 201, the first flow channel of the first heat exchanger 20 is communicated with both the first cooling branch and the second cooling branch, that is, the first flow channel of the first heat exchanger 20 is communicated with the second heat exchanger 32 through the first throttling element 52, and the first flow channel of the first heat exchanger 20 is communicated with the third heat exchanger 31 through the second throttling element 51. In the second dehumidification mode of the thermal management system, the heat of the thermal management system is released through the fifth heat exchanger 202, and the cold of the thermal management system is released through the second heat exchanger 32 and the third heat exchanger 31. In a third dehumidification mode of the thermal management system, the second flow channel of the first heat exchanger 20 is communicated with the fifth heat exchanger 202, the second flow channel of the first heat exchanger 20 is not communicated with the fourth heat exchanger 201, and the first flow channel of the first heat exchanger 20 is communicated with the first cooling branch, that is, the first flow channel of the first heat exchanger 20 is communicated with the second heat exchanger 32 through the first throttling element 52; the first flow passage and the second cooling branch of the first heat exchanger 20 are not communicated, and the first flow passage of the first heat exchanger 20 is not communicated with the third heat exchanger 31 through the second throttling element 51. In a third dehumidification mode of the thermal management system, heat from the thermal management system is released through the fifth heat exchanger 202 and cooling from the thermal management system is released through the second heat exchanger 32.

In this embodiment, the first cooling branch and the second cooling branch of the refrigerant system are arranged in parallel, and compared with the serial arrangement of the first cooling branch and the second cooling branch, the flow resistance of the refrigerant can be reduced, and whether the refrigerant enters the first cooling branch or the second cooling branch to participate in heat exchange can be controlled independently and respectively. The two branches of the refrigerant system are arranged in parallel and the two branches of the first coolant system are arranged in parallel, the structure of the thermal management system is relatively simple, and the control is convenient. In the present embodiment, the refrigerant system may further include an accumulator 40, and the accumulator 40 is communicated with the outlet of the first flow passage of the first heat exchanger 20, or the outlet of the first flow passage of the first heat exchanger 20 can be communicated with the first cooling branch and the second cooling branch through the accumulator 40.

Please refer to fig. 2. The thermal management system comprises a sixth heat exchanger 33, the sixth heat exchanger 33 comprises two flow passages, namely a first flow passage and a second flow passage, wherein the first flow passage of the sixth heat exchanger 33 is a refrigerant flow passage, the second flow passage of the sixth heat exchanger 33 is a coolant flow passage, the refrigerant system comprises a third cooling branch, the third cooling branch comprises a third throttling element 53 and the first flow passage of the sixth heat exchanger 33, the compressor 10 can be communicated with the third cooling branch through the first flow passage of the first heat exchanger 20, and similarly, the third cooling branch can also only comprise the first flow passage of the sixth heat exchanger 33, and will not be described in detail. The coolant system comprises a second coolant system, the second coolant system comprises a second pump 602, a battery cooler 601 and a second flow channel of the sixth heat exchanger 33, the second pump 602, the battery cooler and the second flow channel of the sixth heat exchanger 33 form a circulation loop, the battery cooler 601 can be a water-cooled plate and used for adjusting the temperature of the battery, and the second pump 602 is used for driving the coolant to flow in the second coolant system. The refrigerant of the refrigerant system and the coolant of the second coolant system can exchange heat at the sixth heat exchanger 33. It can be known that the third cooling branch is arranged in parallel with the first cooling branch and the second cooling branch. In this embodiment, the thermal management system further includes a first cooling mode, in which the second flow path of the first heat exchanger 20 may be in communication with the fourth heat exchanger 201 and/or the fifth heat exchanger 202, that is, in the first battery cooling mode, the cooling liquid heat in the first cooling liquid system may be released to the ambient air through the fourth heat exchanger 201; or the heat of the cooling liquid in the first cooling liquid system can be released to the air conditioning box of the vehicle through the fifth heat exchanger 202 so as to regulate the indoor temperature of the vehicle; or simultaneously releases heat through the fourth heat exchanger 201 and the fifth heat exchanger 202; in the first cooling mode, the third throttling element 53 is turned on, the second pump 602 of the second coolant system is turned on, and the refrigerant absorbs heat of the coolant of the second coolant system at the sixth heat exchanger 33 to reduce the battery temperature. In other embodiments, the second coolant system further includes a heater 603, the heater 603 is in serial communication with the battery cooler 601 and the second flow path of the sixth heat exchanger 33, and the heater 603 is used for increasing the battery temperature. In this context, for a better understanding of the invention, the second pump 602 is numbered 602 when it is one and the second pumps are two numbered 6021 and 6022, respectively.

In another embodiment, the thermal management system may not include the second coolant system, the sixth heat exchanger is an air-cooled heat exchanger, and the air flowing through the sixth heat exchanger 33 is cooled and then flows to the heat generating device such as the battery, so as to cool the heat generating device such as the battery.

Referring to fig. 3, the second cooling liquid system includes a four-way reversing valve 604, the four-way reversing valve 604 includes four ports, namely a first port, a second port, a third port and a fourth port, the four-way reversing valve 604 includes a first working state and a second working state, and in the first working state of the four-way reversing valve 604, correspondingly, the second cooling liquid system is in the first working state, the first port of the four-way reversing valve 604 is communicated with the second port of the four-way reversing valve, and the third port of the four-way reversing valve 604 is communicated with the fourth port of the four-way reversing valve; in a second operating state of the four-way reversing valve, and accordingly, the second coolant system is in the second operating state, the first port of the four-way reversing valve 604 is in communication with the third port of the four-way reversing valve, and the second port of the four-way reversing valve 604 is in communication with the fourth port of the four-way reversing valve. The second coolant system includes a first branch and a second branch, wherein the first branch includes a second flow path of the second pump 6021, the battery cooler 601 and the sixth heat exchanger 33, and the second flow path of the second pump 6021, the battery cooler 601 and the sixth heat exchanger 33 is in series communication. The second branch comprises a motor cooler 605 and another second pump 602, the motor cooler 605 and the another second pump 6022 are serially communicated, a first port of the first branch is communicated with a first port of the four-way reversing valve 604, a second port of the first branch is communicated with a second port of the four-way reversing valve 604, a first port of the second branch is communicated with a third port of the four-way reversing valve 604, a second port of the second branch is communicated with a fourth port of the four-way reversing valve 604, in a first working state of the four-way reversing valve, the first branch of the second cooling liquid system forms a circulation loop, the second branch forms a circulation loop, and the two circulation loops can independently operate. In the second operating state of the four-way selector valve 604, the first port of the first branch is communicated with the first port of the second branch, the second port of the first branch is communicated with the second port of the second branch, and the first branch and the second branch are communicated in series to form a circulation loop, and at this time, the second flow channel of the sixth heat exchanger 33 is communicated with both the motor cooler and the battery cooler.

Referring to fig. 3, the coolant system further includes a first bypass pipeline 101 and a second bypass pipeline 102, and the second coolant system can be communicated with the first coolant system through the first bypass pipeline 101 and the second bypass pipeline 102, so that the coolant of the first coolant system and the coolant of the second coolant system can be exchanged, and finally, the purpose of heat exchange is achieved. Specifically, the second coolant system includes a second three-way valve 607, a first port of the second three-way valve 607 is communicated with a first port of the second branch, a second port of the second three-way valve 607 is communicated with one port of the fourth heat exchanger 201 through the first bypass line 101, a third port of the second three-way valve 607 is communicated with a third port of the four-way reversing valve 604, and a second port of the second branch 102 is communicated with the other port of the fourth heat exchanger 201 through the second bypass line 102. When the temperature of the motor is not high and the refrigerant system does not need to be started, the first port of the second three-way valve 607 is communicated with the second port thereof, and the first port of the second three-way valve 607 is not communicated with the third port thereof, so that the fourth heat exchanger 201, the other second pump 6022 and the motor cooler form a circulation loop, the heat of the motor can be released into the air through the fourth heat exchanger 201, the temperature of the motor is reduced under the condition that the refrigerant system is not started, and the energy is saved. Certainly, the second branch can also be communicated with the fifth heat exchanger 202 through the first bypass pipeline and the second bypass pipeline, which is not described in detail, the heat of the motor can be released to the air conditioning box through the fifth heat exchanger 202, so as to adjust the indoor temperature of the vehicle, and the waste heat generated by the motor is utilized to heat the indoor space of the vehicle, thereby being beneficial to waste heat utilization and energy conservation. In addition, the second branch may also be communicated with the second flow channel of the first heat exchanger 20 through the first bypass line and the second bypass line, and the coolant absorbing heat enters the second coolant system through the first bypass line and the second bypass line, so as to increase the temperature of the motor. Similarly, the second three-way valve 607 is disposed in the first branch, and the first branch may also communicate with the fourth heat exchanger or the fifth heat exchanger through the first bypass line and the second bypass line to reduce the temperature of the battery, which will not be described in detail. It is understood that the second port and the third port of the second three-way valve are controlled to communicate with each other, the first port and the third port of the second three-way valve are not communicated with each other, and the heat of the battery can be released to the air through the fourth heat exchanger 201. Referring to fig. 4, the thermal management system includes a four-way valve 203 ', wherein the four-way valve 203 ' includes four ports, the four-way valve 203 ' includes a first operation state and a second operation state, in the first operation state of the four-way valve 203 ', a first port of the four-way valve 203 ' can communicate with at least one of a second port, a third port, and a fourth port of the four-way valve 203 ', and in the second operation state of the four-way valve 203 ', the third port of the four-way valve 203 ' can communicate with at least one of the second port, the first port, and the fourth port of the four-way valve 203 '. In the present embodiment, a first port of four-way valve 203 ' communicates with one port of the second flow path of first heat exchanger 20, a second port of four-way valve 203 ' communicates with one port of fourth heat exchanger 201, a fourth port of four-way valve 203 ' communicates with one port of fifth heat exchanger 202, a third port of four-way valve 203 ' communicates with the second coolant system through first bypass line 101, specifically, a third port of four-way valve 203 ' communicates with an outlet of second pump 602 through first bypass line 101, and second bypass line 102 communicates with the other port of battery cooler 601. In a first operating state of four-way valve 203', the cooling liquid in the second flow path of first heat exchanger 20 can enter at least one of the branch of fourth heat exchanger 201, the branch of fifth heat exchanger 202 and the second cooling liquid system to increase the temperature of the corresponding heat exchanger; the cooling liquid of the battery cooler can enter at least one of the branch where the fourth heat exchanger is located and the branch where the fifth heat exchanger is located, and heat is released through the fourth heat exchanger or the fifth heat exchanger so as to reduce the temperature of the battery.

In addition to the heating mode, cooling mode, and dehumidification mode described above, the thermal management system includes a first cooling mode, a second cooling mode, and a heating mode. The cooling mode described here refers to cooling of heat-generating devices such as a battery and a motor. In the first cooling mode, the second flow channel of the first heat exchanger 20 is communicated with the fifth heat exchanger 202 and/or the fourth heat exchanger 201, the third throttling element 53 is turned on, the second pump 602 is turned on, at this time, the second coolant system operates, heat in the second coolant system is absorbed by the refrigerant flowing through the first flow channel of the sixth heat exchanger 33, after circulation in the coolant system, the heat absorbed by the refrigerant is released to the coolant in the first coolant system at the first heat exchanger, and then the heat is released at the fourth heat exchanger and/or the fifth heat exchanger, so as to cool the heat generating equipment such as the battery or the motor.

In the second cooling mode, the compressor 10 is turned off, the second coolant system is communicated with the branch of the fourth heat exchanger 201 and/or the branch of the fifth heat exchanger 202 through the first bypass line and the second bypass line, and the second pump 602 is turned on. At this time, the coolant in the second coolant system enters the fourth heat exchanger 201 and/or the fifth heat exchanger 202 through the first bypass pipeline and the second bypass pipeline, and then heat is released in the fourth heat exchanger 201 and/or the fifth heat exchanger 202, so as to cool the heat-generating devices such as the battery or the motor.

In a heating mode of the thermal management system, the compressor 10 is started, the second throttling element 51 is started, the first throttling element 52 and the third throttling element 53 are closed, the second flow passage of the first heat exchanger 20 is communicated with the second cooling liquid system through the first bypass pipeline 101 and the second bypass pipeline 102, cooling liquid enters the second cooling liquid system through the first bypass pipeline 101 and the second bypass pipeline 102 after absorbing heat in the second flow passage of the first heat exchanger 20, so that the temperature of equipment such as a battery and a motor is improved, and the heating mode is suitable for the situation that the temperature of the external environment is low and the equipment such as the battery and the motor needs to be preheated.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.