CN112519529A

CN112519529A - Thermal management system

Info

Publication number: CN112519529A
Application number: CN201911110168.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Sanhua Holding Group Co Ltd
Current assignee: Sanhua Holding Group Co Ltd
Priority date: 2019-09-19
Filing date: 2019-11-14
Publication date: 2021-03-19
Also published as: CN112519528B; CN112519528A

Abstract

The invention discloses a thermal management system, the thermal management system includes a refrigerant system and a cooling liquid system, the thermal management system further includes a fourth heat exchanger, the fourth heat exchanger is arranged in the cooling liquid system, and the fourth heat exchanger can Pumping heat from and releasing heat to the air contributes to the performance of the thermal management system.

Description

Thermal management system

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of thermal management, in particular to a thermal management system for a vehicle.

[ background of the invention ]

The heat management system comprises an external heat exchanger, wherein refrigerant in the external heat exchanger can absorb or release heat to ambient air; the heat management system can carry out heat management on a heat generating component so that the heat generating component can work in a reasonable temperature range, and how to control the temperature of the heat generating component and improve the performance of the heat management system is a technical problem to be solved.

[ summary of the invention ]

The invention aims to provide a thermal management system which is beneficial to improving the performance of the thermal management system.

A thermal management system comprising a refrigerant system and a coolant system, the refrigerant of the refrigerant system being isolated from circulation by a coolant of the coolant system; the refrigerant system comprises a compressor and a first throttling device, the heat management system further comprises a first heat exchanger, the first heat exchanger comprises a refrigerant flow channel and a cooling liquid flow channel, and the first throttling device can be communicated with an inlet of the compressor through the refrigerant flow channel of the first heat exchanger;

the cooling liquid system comprises a pump, a first branch and a second branch, the first branch comprises a second heat exchanger, the second branch comprises a third heat exchanger, the cooling liquid system further comprises at least one fourth heat exchanger, at least one of the first branch and the second branch comprises the fourth heat exchanger, and the fourth heat exchanger is arranged outside an air-conditioning box of the vehicle;

in a heating mode of the thermal management system, the compressor, the pump and the first throttling device are opened, and a cooling liquid channel of the first heat exchanger, the pump and the fourth heat exchanger are communicated;

in a first cooling mode of the thermal management system, the pump is turned on, and the fourth heat exchanger, the pump and the second heat exchanger are in communication, and/or the fourth heat exchanger, the pump and the third heat exchanger are in communication.

The heat management system comprises a refrigerant system and a cooling liquid system, the fourth heat exchanger is part of the cooling liquid system and is arranged outside an air conditioning box of the vehicle, the heat management system can absorb heat in air through the fourth heat exchanger, the cooling liquid system can release heat to the air through the fourth heat exchanger, the fourth heat exchanger is arranged in the cooling liquid system, a new way is provided for the heat management system to absorb and release the heat, or when the heat management system works, the fourth heat exchanger in the cooling liquid system can absorb heat in the environment and release heat to the environment, and the heating and refrigerating performance of the heat management system is enhanced.

[ description of the drawings ]

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

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

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

FIG. 4 is a schematic connection diagram of a fourth embodiment of a thermal management system;

FIG. 5 is a schematic connection diagram of a fifth embodiment of a thermal management system;

FIG. 6 is a schematic connection diagram of a sixth embodiment of a thermal management system;

FIG. 7 is a schematic connection diagram of a seventh embodiment of a thermal management system.

[ detailed description ] embodiments

A specific thermal management system for a vehicle is described below with reference to the accompanying drawings. Referring to fig. 1, the thermal management system includes a refrigerant system and a coolant system, a refrigerant of the refrigerant system and a coolant of the coolant system are isolated from each other and do not flow, the refrigerant system includes a compressor 10 and a first throttling device 204, a first heat exchanger 104 of the thermal management system has a refrigerant flow passage and a coolant flow passage, the refrigerant flowing through the refrigerant flow passage and the coolant flowing through the coolant flow passage can exchange heat in the first heat exchanger 104, an inlet of the refrigerant flow passage of the first heat exchanger 104 is communicated with the first throttling device 204, and an outlet of the refrigerant flow passage of the first heat exchanger 104 is communicated with a suction port of the compressor 10 or with an inlet of the compressor 10 through a gas-liquid separator 207. The coolant system includes a first circuit and a second circuit that are capable of operating independently of each other. The first loop comprises a second heat exchanger 106 and a first pump 502, the second heat exchanger 106 is serially communicated with the first pump 502 to form a first loop, the first pump 502 can drive cooling liquid to flow in the first loop, the second heat exchanger 106 can be used for adjusting the temperature of heating equipment such as a motor, the heating equipment such as the motor can directly or indirectly exchange heat with the cooling liquid in the second heat exchanger 106, and then the temperature of the heating equipment such as the motor is adjusted. The second loop comprises a third heat exchanger 105 and a second pump 501, the third heat exchanger 105 and the second pump 501 are communicated in series to form a second loop, and the second pump 501 can drive the cooling liquid to flow in the second loop. The third heat exchanger 105 may be used to adjust the temperature of a heat generating device such as a battery, and the heat generating device such as a battery may directly or indirectly exchange heat with the cooling liquid in the third heat exchanger 105 to adjust the temperature of the heat generating device such as a battery. Since the operating temperature of the heat generating device such as the motor is higher than that of the heat generating device such as the battery, the cooling fluid in the first circuit is not communicated with the cooling fluid in the second circuit, so as to prevent the battery from being damaged.

Specifically, the first circuit includes a first branch including the second heat exchanger 106 and the first pump 502, the second heat exchanger 106 is communicated with the first pump 502, the first branch has two ports, the two ports of the first branch are an inlet of the cooling liquid into the first branch and an outlet of the cooling liquid out of the first branch, and the two ports of the first branch can be an opening of a device or an opening of a pipeline. The coolant system includes the first valve element 403, and in this embodiment, the first valve element 403 is a three-way valve, the first valve element 403 has three connection ports, the first connection port 4031 of the first valve element 403 can communicate with the second connection port 4032 of the first valve element 403 or with the third connection port 4033 of the first valve element 403, the first connection port 4031 of the first valve element 403 communicates with one port of the first branch passage, the second connection port 4032 of the first valve element 403 communicates with one port of the coolant flow passage of the first heat exchanger 104, and the third connection port 4033 of the first valve element and the other port of the coolant flow passage of the first heat exchanger 104 can communicate with the other port of the first branch passage. When the first connection port of the first valve element 403 is communicated with the third connection port and the first connection port of the first valve element 403 is not communicated with the second connection port, the first valve element and the first branch form a first loop, and the cooling liquid channel of the first heat exchanger 104 is not communicated with the first loop; when the first connection port and the third connection port of the first valve element 403 are not communicated and the first connection port and the second connection port of the first valve element 403 are communicated, the coolant flow channel of the first heat exchanger 104 is communicated with the first branch, that is, the coolant flow channel of the first heat exchanger 104, the first pump 502 and the second heat exchanger 106 are communicated in series, and at this time, the heat of the coolant in the first branch can be released to the refrigerant system through the first heat exchanger 104. In other embodiments, the first valve member 403 may also be a combination of two shut-off valves or flow regulating valves, which will not be described in detail.

The second circuit includes a second branch including the third heat exchanger 105 and the second pump 501, the second branch having two ports, the two ports of the second branch being an inlet of the cooling liquid into the second branch and an outlet of the cooling liquid out of the second branch, and the two ports of the second branch may be openings of the device or openings of the piping. The coolant system includes a second valve element 402, and in the present embodiment, the second valve element 402 is a three-way valve, the first connection port 4021 of the second valve element 402 can communicate with the second connection port 4022 of the second valve element 402 or with the third connection port 4023 of the second valve element 402, the first connection port 4021 of the second valve element 402 can communicate with one port of the second branch passage, the second connection port 4022 of the second valve element 402 can communicate with one port of the coolant flow passage of the first heat exchanger 104, and the other port of the second branch passage and the other port of the coolant flow passage of the first heat exchanger 104 can communicate with the third connection port 4023 of the second valve element 402; when the first connection port of the second valve element 402 is communicated with the third connection port and the first connection port of the second valve element 402 is not communicated with the second connection port, the second valve element 402 and the second branch form a second loop, and the cooling liquid channel of the first heat exchanger 104 is not communicated with the second loop; when the first connection port and the third connection port of the second valve member 402 are not communicated and the first connection port and the second connection port of the second valve member 402 are communicated, the coolant flow passage of the first heat exchanger 104 is communicated with the first branch passage, that is, the coolant flow passage of the first heat exchanger 104, the second pump 501, and the third heat exchanger 105 are communicated in series. In other embodiments, the second valve member 402 may also be a combination of two shut-off valves or flow regulating valves, which are not described in detail. When the thermal management system is in operation, the coolant flow channel of the first heat exchanger 104 can be communicated with the first branch or the second branch, and it should be explained that "the coolant flow channel of the first heat exchanger 104 can be communicated with the first branch or the second branch" herein means that the coolant in the coolant flow channel of the first heat exchanger 104 can flow into and out of the first branch or the second branch, or the coolant of the first branch or the second branch can flow into and out of the coolant flow channel of the first heat exchanger 104.

In an embodiment of the present invention, the fourth heat exchanger 107 is disposed in the first branch, or the fourth heat exchanger 107 is a part of the first branch, the fourth heat exchanger 107 may be an air-cooled heat exchanger, such as a microchannel heat exchanger, and the fourth heat exchanger 107, the first pump 502, and the second heat exchanger 106 are in serial communication. In the thermal management system for a vehicle, the fourth heat exchanger 107 is provided outside an air conditioning box of the vehicle, and the fourth heat exchanger 107 can exchange heat with ambient air. Specifically, when the temperature of the heating equipment such as the motor is high and heat dissipation is needed, the cooling liquid in the first loop is only circulated in the first loop, the heat of the heating equipment such as the motor is released into the air through the fourth heat exchanger 107, and the temperature control of the heating equipment such as the motor can be realized without starting the compressor, so that energy can be saved. In other embodiments, the fourth heat exchanger 107 may also be disposed in parallel with the second heat exchanger 106 and then in serial communication with the first pump 502, or the fourth heat exchanger 107 may be in serial communication with the first pump 502, the second heat exchanger 106 may also be in serial communication with the first pump 502, and the second heat exchanger 106 and the fourth heat exchanger 107 may be disposed in parallel. In other technical solutions of the present invention, the fourth heat exchanger 107 may be disposed in the second branch, and of course, the coolant system may also include two fourth heat exchangers 107, one of which is disposed in the first branch, and the other of which is disposed in the second branch. Along the gravity direction, the heights of the two ports of the first branch are higher than the cooling liquid flow channel of the first heat exchanger, and the heights of the two ports of the second branch are higher than the cooling liquid flow channel of the first heat exchanger. So set up and to reduce the higher coolant flow direction of temperature and lower coolant flow, reduce the heat exchange to be favorable to reducing calorific loss.

The refrigerant system comprises a second throttling device 205, a fifth heat exchanger 101, a seventh heat exchanger 103 and a first valve device 201, wherein the seventh heat exchanger 103 of the refrigerant system at least comprises a first port and a second port, the second throttling device 205 is communicated with the second port of the seventh heat exchanger 103, a refrigerant inlet of the fifth heat exchanger 101 is communicated with an outlet of the compressor 10, a refrigerant outlet of the fifth heat exchanger 101 is communicated with the first valve device 201, a refrigerant outlet of the fifth heat exchanger 101 can be communicated with the second throttling device 205 through the first valve device 201, the fifth heat exchanger 101 can also be communicated with the first throttling device 204 through the first valve device, and a first port of the seventh heat exchanger 103 can also be communicated with a suction port of the compressor 10 through the first valve device 201 or communicated with an inlet of the compressor 10 through a gas-liquid separator 207. The refrigerant system further includes an eighth heat exchanger 102 and a third throttling device 202, the third throttling device 202 being capable of communicating with an inlet of the eighth heat exchanger 102, an outlet of the eighth heat exchanger 102 being in communication with an inlet of the compressor 10. The first valve device 201 comprises at least a first communication port communicating with the refrigerant outlet of the fifth heat exchanger 101, a second communication port communicating with the suction port of the compressor 10, a third communication port communicating with the first throttling device 205, the second throttling device 204 and the third throttling device 202, respectively, and a fourth communication port communicating with the suction port of the compressor 10, the third communication port communicating with the first port of the seventh heat exchanger 103, the first valve device 201 comprises at least a first operating state and a second operating state, in the first operating state of the first valve device 201, the first valve device 201 opens a communication passage between the first communication port and the third communication port, closes a communication passage between the fourth communication port and the second communication port and the first communication port, in the second operating state of the first valve device 201, the first valve device 201 opens a communication passage between the first communication port and the second communication port, and opening a communication channel of the third communication port and the fourth communication port. The fifth heat exchanger 101 and the eighth heat exchanger 102 are disposed in an air conditioner of a vehicle to regulate the temperature of a passenger compartment of the vehicle, and the seventh heat exchanger 103 and the fourth heat exchanger 107 are disposed outside an air conditioning box of the vehicle to exchange heat with ambient air.

The second port of the seventh heat exchanger 103 is further provided with a one-way element 206 in parallel with the second throttling device 205, or the second communication port can be communicated with the second port of the seventh heat exchanger 103 through the first throttling device 205 and the one-way element 206 in parallel, wherein the one-way element 206 is turned on when the refrigerant flows out of the direction of the second port of the seventh heat exchanger 103, and is turned off when the refrigerant flows into the direction of the second port of the seventh heat exchanger 103. In addition, the first throttling means 205 may also use a throttling means with a cut-off function, so that the unidirectional element 206 may be eliminated. In addition, the connection or communication described in this specification may be direct connection or communication, for example, two components may be assembled together, so that a connection pipeline may not be required, and the system is more compact, or may be indirect connection or communication, for example, communication through a pipeline, or communication after passing through a certain component, which is not illustrated herein; in the technical scheme of the invention, the opening of the throttling device means that the opening of the throttling device is the largest, the closing of the throttling device means that the opening of the throttling device is zero, and the opening of the throttling device means the state between opening and closing, or the throttling state of the throttling device. The third throttling device 202 and the first throttling device 205 may be a thermostatic expansion valve, an electronic expansion valve, or a throttling device such as a capillary tube capable of regulating the refrigerant flowing therethrough; the check element 206 may be a stop valve or a flow control valve or an electromagnetic valve with an on-off control function, or may be a check valve that allows flow in one direction and blocks flow in the other direction; the check member or valve module may also be integrated with the heat exchanger to form an assembly that is more compact, such as the assembly formed by integrating the third throttling device 202 and the fifth heat exchanger 102.

The cooling liquid system of the thermal management system further comprises a water kettle 108, the medium in the water kettle 108 can be cooling liquid, the cooling liquid flow channel of the first heat exchanger 104, the water kettle 108, the second pump 501 and the third heat exchanger 105 are communicated in series, the water kettle 108 can be a part of the cooling liquid system flow channel, the cooling liquid in the water kettle participates in the flow of the cooling liquid system, and the water kettle 108 can also be only communicated with the cooling liquid flow channel and participates in the flow of the cooling liquid. The first circuit may also be provided with a kettle 108', which will not be described in detail.

The air conditioning box of the vehicle is provided with a plurality of air ducts (not shown) communicated with the passenger compartment of the vehicle, and the air ducts are provided with grilles (not shown) capable of adjusting the sizes of the air ducts. An inner circulation air port, an outer circulation air port, a circulation air door 301 for adjusting the sizes of the inner circulation air port and the outer circulation air port and a motor for driving the circulation air door 301 are arranged on one side of the air inlet of the air conditioning box. The internal circulation air inlet is communicated with the vehicle passenger compartment, and air in the vehicle passenger compartment enters the air conditioning box through the internal circulation air inlet and then enters the vehicle room again through the air duct to form internal circulation; the external circulation air opening is communicated with the outside of the vehicle passenger compartment, and air outside the vehicle compartment enters the air conditioning box through the external circulation air opening and enters the vehicle passenger compartment through the air duct. The circulating air door 301 is arranged between the inner circulating air port and the outer circulating air port, the controller can control the circulating air door 301 through the motor, the inner circulating air port can be closed when the circulating air door 301 is switched to the inner circulating air port to form outer circulation, the outer circulating air port can be closed when the circulating air door 301 is switched to the outer circulating air port to form vehicle inner circulation, the sizes of the inner circulating air port and the outer circulating air port can be adjusted by adjusting the position of the circulating air door 301, and therefore the proportion of vehicle outer air and vehicle inner air in air entering the air conditioning box is adjusted. In addition, a fan 303 is further disposed on one side of the seventh heat exchanger 103, so that the speed of the wind flowing through the seventh heat exchanger 103 can be increased.

The fifth heat exchanger 101 is disposed in the air conditioning cabinet, and a blower 304 is disposed in the air conditioning cabinet at a position close to the inner circulation air opening and the outer circulation air opening. When the temperature air door 302 is closed, the air blown in from the inner circulation air port or the outer circulation air port cannot flow through the fifth heat exchanger 101, and the air flows through channels on two sides of the temperature air door 302 and then enters the vehicle room through an air duct. The seventh heat exchanger 103 and the fourth heat exchanger 107 are disposed outside an air conditioning box of the vehicle, and specifically, the seventh heat exchanger 103 and the fourth heat exchanger 107 are disposed in a front end module of the vehicle.

The thermal management system comprises a heating mode and a first cooling mode, and the working conditions of the thermal management system in the modes are described respectively. The heating mode of the thermal management system comprises a first heating mode and a second heating mode. When the ambient temperature is too low, the heating performance of the fifth heat exchanger 101 is insufficient, or the heat quantity pumped by the heat management system from the seventh heat exchanger 103 is insufficient to provide the heat quantity needed by the room, the heat management system enters the first heating mode, in the first heating mode, the first valve device 201 is in the second working state, the first throttling device 205 and the second throttling device 204 are opened, the refrigerant of the heat management system is compressed by the compressor 10 and then becomes the high-temperature high-pressure refrigerant, the temperature damper 302 is opened, the high-temperature high-pressure refrigerant exchanges heat with the ambient air in the fifth heat exchanger 101, and the refrigerant of the fifth heat exchanger 101 releases heat to the ambient air. The flow path of the refrigerant outlet of the fifth heat exchanger 101 leading to the second port of the seventh heat exchanger 103 and the first flow path of the first heat exchanger 104 is opened, and the flow path leading to the eighth heat exchanger 102 is closed. Correspondingly, the refrigerant enters the seventh heat exchanger 103 after being throttled by the second throttling device 205, the low-temperature and low-pressure refrigerant exchanges heat with air around the seventh heat exchanger 103 to absorb heat of the air, the refrigerant can return to the compressor 10 after flowing out of the seventh heat exchanger 103, and the low-temperature and low-pressure refrigerant enters the compressor 10 and is compressed into the high-temperature and high-pressure refrigerant again by the compressor 10, so that the cycle is performed. The refrigerant flowing through the refrigerant flow path of the fourth heat exchanger 104 exchanges heat with the coolant of the coolant system, and in this case, the coolant flow path of the first heat exchanger 104 may be communicated with the first circuit or the coolant flow path of the first heat exchanger 104 may be communicated with the second circuit by controlling the first valve element 402 and the second valve element 403. Taking the first branch and the coolant flow channel of the first heat exchanger 104 as an example, heat exchange is performed between the heating devices such as the motor and the second heat exchanger 106, the coolant in the second heat exchanger 106 absorbs heat of the heating devices such as the motor, the heat management system obtains the heat absorbed by the heating devices such as the motor from the second heat exchanger 106 through the first heat exchanger 104, and the heat is released to the air-conditioning box through the fifth heat exchanger 101, and at this time, two heat sources of the heat management system are respectively air outside the air-conditioning box of the vehicle and the heating devices such as the motor. Where the fourth heat exchanger 107 is also arranged in the first circuit, the fourth heat exchanger 107 is capable of absorbing heat from the ambient air, it being emphasized that the fourth heat exchanger 107 is arranged upstream of the second heat exchanger 106, where "upstream" means that the cooling liquid passes through the fourth heat exchanger 107 and then the second heat exchanger 106. So set up because the temperature of ambient air is less than the temperature of the equipment that generates heat such as motor, the coolant liquid absorbs the heat of ambient air at fourth heat exchanger 107 at first, and coolant liquid temperature rises, then absorbs the heat at second heat exchanger 106, and the temperature of coolant liquid can further rise, if second heat exchanger 106 sets up in the upper reaches of fourth heat exchanger 107, after the coolant liquid absorbs the heat from second heat exchanger 106, can't absorb the heat from fourth heat exchanger 107. The heat management system can pump heat from the air through the fourth heat exchanger 107, which is equivalent to increase of the heat exchange area of the seventh heat exchanger 103, the first heat exchanger 104 is a double-channel heat exchanger, the control of the superheat degree of the first heat exchanger 104 is easier than that of the seventh heat exchanger 107, at this time, the specific heat capacity of the cooling liquid is larger than that of the air, the temperature change amplitude is smaller, and in addition, the double-channel heat exchanger is small in size, short in channel and better in oil return performance.

In winter, the temperature outside the vehicle is low in some areas, when the outside temperature is lower than zero or close to zero, the surface of the seventh heat exchanger 103 is easy to frost or freeze or has faults, further influencing the energy efficiency of the operation of the thermal management system and even losing the heating performance, the thermal management system enters a second heating mode, the first valve device 201 is in a second working state, the refrigerant discharged by the first heat exchanger 101 enters the first throttling device 204 after passing through the first valve device 201, the first throttling device 204 works, the second throttling device 205 and the third throttling device 202 are closed, the first valve element 403 and the second valve element 402 are controlled to enable the first loop or the second loop to be communicated with the cooling liquid flow channel of the fourth heat exchanger, the thermal management system pumps heat through the first loop or the second loop, in contrast to the first heating mode, the thermal management system primarily absorbs heat from the cooling fluid in the first branch or the second branch. When the seventh heat exchanger 103 cannot effectively pump heat, certain heat is provided indoors by using heat of equipment such as a battery or equipment such as a motor, which is beneficial to improving comfort. Of course, when the ambient temperature is relatively high, the thermal management system pumps heat through the seventh heat exchanger 103 and then releases the heat at the sixth heat exchanger 101, which will not be described in detail.

In a first cooling mode of the thermal management system, taking the fourth heat exchanger 107 disposed in the first branch as an example, when the temperature of the heat generating devices such as the motor is high and needs to be reduced, the first valve element and the second valve element are controlled to make the coolant in the first loop flow in the first loop, the heat of the heat generating devices such as the motor is released to the coolant, and finally released to the air through the fourth heat exchanger 107, at this time, the heat generating devices such as the battery can be cooled through the first heat exchanger 104, the heat generating devices such as the battery cool themselves, or the heat is dissipated through another fourth heat exchanger 107. In the first cooling mode, the first pump 502 is turned on, the fourth heat exchanger 107, the first pump 502 and the second heat exchanger 106 are communicated, and the first pump 502 drives the cooling fluid to flow in the first loop. And/or the fourth heat exchanger 107 and the second pump 501 are communicated with the third heat exchanger 105, and the second pump 501 drives the cooling liquid to flow in the second loop. In the first cooling liquid mode, at least one of the battery or the motor releases heat using the fourth heat exchanger 107, and the compressor may not be turned on or the compressor may be operated with relatively low power consumption, which can reduce power consumption and save energy. In summary, in the heating mode of the thermal management system, the thermal management system can pump heat from the air through the fourth heat exchanger 107, and in the first cooling mode of the thermal management system, the thermal management system can release heat to the air through the fourth heat exchanger 107. Compared with the thermal management system only provided with the seventh heat exchanger 103, the heat exchange area of the seventh heat exchanger 103 is increased, and the heating performance and the cooling performance of the thermal management system are improved. When the motor or the battery needs to be cooled in the second cooling liquid mode of the thermal management system, the compressor 10 and the first throttling device 204 are started, the first valve element and the second valve element are controlled, the cooling liquid flow passage of the first heat exchanger 104 is selected to be communicated with the first loop or the second loop, and the heat of the battery or the motor is reduced.

Referring to fig. 3, the coolant system may also be provided with only one pump 50, an outlet of the pump 50 is communicated with one port of the coolant flow passage of the first heat exchanger 104, and the second connection port 4032 of the first valve element is communicated with the coolant flow passage of the first heat exchanger 104 through the outlet of the pump 50. The thermal management system may save one pump and relatively reduce costs compared to the embodiment shown in fig. 1.

Referring to fig. 2, the fifth heat exchanger 101 is a two-channel heat exchanger, for example, the fifth heat exchanger 101 is a plate heat exchanger, the fifth heat exchanger 101 includes a refrigerant channel and a coolant channel, an outlet of the compressor 10 is communicated with an inlet of the refrigerant channel of the fifth heat exchanger 101, and the high-temperature and high-pressure refrigerant can release heat in the refrigerant channel of the fifth heat exchanger 101 to increase heat of the coolant channel. The heat management system comprises a third loop, the third loop comprises a third pump 503, a cooling liquid channel of the fifth heat exchanger 101 and a sixth heat exchanger 1001, and the cooling liquid channel of the third pump 503 and the fifth heat exchanger 101 is communicated with the sixth heat exchanger 1001 in series; sixth heat exchanger 1001 is disposed inside an air conditioning compartment of a vehicle, and fifth heat exchanger 101 is disposed outside the air conditioning compartment of the vehicle. The third circuit is capable of exchanging heat with the second circuit or the first circuit. In a specific embodiment, the thermal management system further includes a first communicating pipe 51 and a second communicating pipe 52, the first communicating pipe 51 and the second communicating pipe 52 each include a first end and a second end, the first end of the first communicating pipe 51 is communicated with the second circuit, and the second end of the first communicating pipe 51 is communicated with the third circuit; likewise, a first end of the second communication pipe 52 communicates with the second circuit, and a second end of the second communication pipe 52 communicates with the third circuit. The thermal management system can exchange the coolant of the second circuit and the coolant of the third circuit through the first communication pipe 51 and the second communication pipe 52, that is, the coolant of the second circuit can flow into the third circuit through the first communication pipe 51 or the second communication pipe 52, or the coolant of the third circuit can flow into the second circuit through the first communication pipe 51 or the second communication pipe, and finally, the heat exchange between the second circuit and the third circuit is realized. Specifically, of the four ports of the first communication pipe 51 and the second communication pipe 52, at least one port is directly or indirectly communicated with the inlet of the third pump 503 or the second pump 501, for example, the second end of the first communication pipe 51 is communicated with the inlet of the third pump 503, the second end of the first communication pipe 51 is communicated with the second circuit, and the two ends of the second communication pipe 52 are communicated with the second circuit and the third circuit, but the two ends of the second communication pipe are not directly communicated with the third pump 503 or the second pump 501. This facilitates the flow of the coolant in the second circuit and the third circuit towards each other.

Specifically, the third circuit includes a third branch including the third pump 503, the coolant flow passage of the fifth heat exchanger 101, and the sixth heat exchanger 1001 in series, or the third branch is a broken form of the third circuit. The coolant system comprises a third valve element 401, the third valve element 401 comprises a first interface, a second interface and a third interface, the third valve element 401 can open or close a communication passage between the first interface and the third interface or between the first interface and the second interface, the first interface of the third valve element 401 and the second interface of the third valve element 401 are communicated with two ends of a third branch, the third interface of the third valve element 401 is communicated with one end of a first communication pipeline 51, and the other end of the first communication pipeline 51 is communicated with one end of a second branch. Both ends of the second communicating pipe 52 communicate with the respective other ends of the second branch passage and the third branch passage. The thermal management system may control whether the second circuit exchanges cooling fluid with the third circuit through the third valve element 401, for example, when the first interface and the second interface of the third valve element 401 are communicated, and when the first interface and the third interface of the third valve element 401 are not communicated, the cooling fluid in the third circuit flows in the third circuit. When the heat exchange is required in the circulation mode of the thermal management system, that is, when the third circuit and the second circuit need heat exchange, for example, the heat generated by the fifth heat exchanger 101 is used to increase the heat of the heat generating device such as a battery, or the heat of the heat generating device such as a battery is used to heat the passenger compartment, the first interface and the second interface of the third valve element 401 are controlled not to be communicated, the first interface and the third interface of the third valve element 401 are communicated, and the coolant of the second circuit and the coolant of the third circuit are exchanged, so that the heat exchange between the second circuit and the third circuit is finally realized, that is, the heat of the second circuit is released in the third circuit through the first communication pipeline and the second communication pipeline, so as to increase the temperature of the passenger compartment. Or the heat of the third loop is released in the second loop through the first communication pipeline and the second communication pipeline, and is used for increasing the temperature of heat-generating equipment such as a battery. In other embodiments, the third valve element 401 includes only the first and second interfaces, the third valve element 401 is capable of opening or closing a communication path between the first interface of the third valve element 401 and the second interface of the third valve element 401, the first interface of the third valve element 401 is in communication with the first communication line 51, the second interface of the third valve element 401 is in communication with one end of the second branch or the third branch, and the thermal management system controls the second circuit to be in communication with the third circuit through the third valve element 401. Of course, the third valve element 401 may also communicate with the second communication line 52 and will not be described in detail. Of course, the coolant system may also include a fourth valve element that is in communication with the third valve element in the same manner and will not be described in detail. The thermal management system is provided with a third valve element 401 and/or a fourth valve element, which in turn can control the second circuit to exchange coolant with the third circuit to save energy of the thermal management system.

Please refer to fig. 4. The coolant system includes a seventh heat exchanger 2001, the seventh heat exchanger 2001 includes a first flow channel and a second flow channel, the first flow channel of the seventh heat exchanger 2001 is a part of the third circuit, the second flow channel of the seventh heat exchanger 2001 is a part of the second circuit, and the coolant of the second circuit and the coolant of the third circuit can exchange heat in the seventh heat exchanger 2001. In contrast to the above-described embodiment, the second circuit and the third circuit perform only heat exchange, and do not perform coolant exchange. Since the second circuit is provided with the second pump 501 and the third circuit is provided with the third pump 503, when the second circuit and the third circuit need heat exchange, the third pump 503 and the second pump 501 are turned on, or the thermal management system can control whether the second circuit and the third circuit exchange heat through the controller of the third pump 503 and the second pump 501. Further, please refer to fig. 5. The coolant system further includes a bypass pipeline 53, the bypass pipeline 53 is disposed in the third loop, the bypass pipeline 53 is disposed in parallel with the first flow channel of the seventh heat exchanger 2001, the bypass pipeline 53 can bypass the first flow channel of the seventh heat exchanger 2001, and of course, in order to control whether the bypass pipeline 53 bypasses the first flow channel of the seventh heat exchanger 2001, the thermal management system is further provided with a corresponding fifth valve 404; of course, the bypass line 53 may be provided in the second circuit, and the bypass line 53 may bypass the second flow passage of the seventh heat exchanger 2001, which will not be described in detail. The heat management system is provided with a bypass pipeline 53, and the second loop and the third loop can run independently and simultaneously when not exchanging heat, so that the control is convenient.

Referring to fig. 6, compared to the embodiment illustrated in fig. 1, the coolant system includes only one valve element, such as a second valve element 402, where the second valve element 402 is a three-way valve, a first connection port of the second valve element 402 is communicated with one port of the coolant flow passage of the first heat exchanger 104, a first connection port of the second valve element 402 and a second connection port of the second valve element 402 are respectively communicated with one end of the first branch and one end of the second branch, and the other end of the first branch and the other end of the second branch are communicated with the other port of the coolant flow passage of the first heat exchanger 104. When the first connection port of the second valve element 402 is communicated with the second connection port or the third connection port, the coolant flow passage of the first heat exchanger 104 is communicated with one of the first branch or the second branch, the heat of the air around the fourth heat exchanger 107 can be pumped to the refrigerant system through the first heat exchanger, and the heat of the motor or the battery can be released to the air through the fourth heat exchanger, which is relatively simple compared with the embodiment illustrated in fig. 1.

Referring to fig. 7, compared to the embodiment illustrated in fig. 6, the thermal management system includes a first shut-off valve 601, a first port of the first shut-off valve 601 is communicated with one port of the first branch, and a second port of the first shut-off valve 601 is communicated with the other port of the first branch; the thermal management system includes a second shut off valve 602, a first port of the second shut off valve 602 communicating with one port of the second branch, and a second port of the second shut off valve 602 communicating with another port of the second branch. When the thermal management system works, the first stop valve is opened, the first branch can form a first loop through the first stop valve 601, the cooling liquid in the first loop flows under the driving of the first pump 502, and the heat of the heat-generating equipment such as the motor can be released into the air through the fourth heat exchanger 107. Similarly, when the thermal management system is in operation, the second stop valve is opened, the second branch can form a second loop through the second stop valve 602, the cooling liquid in the second loop flows under the driving of the second pump 501, and the heat of the heat-generating device such as the battery can be released into the air through the fourth heat exchanger. A first stop valve 601 and a second stop valve 602 are provided in the coolant system, and the first circuit and the second circuit can be operated independently at the same time or only one of the circuits can be operated. Of course, the coolant system may also be provided with only one shut-off valve, such as the first shut-off valve or the second shut-off valve.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.

Claims

1. A thermal management system, the thermal management system comprising a refrigerant system and a cooling liquid system, the refrigerant of the refrigerant system and the cooling liquid of the cooling liquid system are isolated from each other and do not circulate; the refrigerant system Including a compressor and a first throttling device, the thermal management system further includes a first heat exchanger, the first heat exchanger includes a refrigerant flow channel and a cooling liquid flow channel, the first throttling device can pass through The refrigerant flow channel of the first heat exchanger communicates with the inlet of the compressor;

The cooling liquid system includes a pump, a first branch circuit and a second branch circuit, the first branch circuit includes a second heat exchanger, the second branch circuit includes a third heat exchanger, and the cooling liquid system further At least one fourth heat exchanger is included, and at least one of the first branch circuit and the second branch circuit includes the fourth heat exchanger, and the fourth heat exchanger is arranged outside the air conditioning box of the vehicle;

In the heating mode of the thermal management system, the compressor, the pump and the first throttling device are turned on, the cooling liquid flow passage of the first heat exchanger, the pump and the fourth The heat exchanger is connected;

In the first cooling mode of the thermal management system, the pump is on, the fourth heat exchanger, the pump is in communication with the second heat exchanger, and/or the fourth heat exchanger, The pump is in communication with the third heat exchanger.

2 . The thermal management system according to claim 1 , wherein the thermal management system comprises a first valve member, the first valve member has three connection ports, and the first connection port of the first valve member can communicates with the second connection port of the first valve member or communicates with the third connection port of the first valve member, the first connection port of the first valve member is connected to one of the cooling liquid flow passages of the first heat exchanger The second connection port of the first valve member communicates with a port of the first branch circuit, and the third connection port of the first valve member communicates with a port of the second branch circuit, so The other port of the first branch and the other port of the second branch communicate with one port of the cooling liquid flow channel of the first heat exchanger.

3 . The thermal management system according to claim 2 , wherein the thermal management system comprises a first shut-off valve, and a first port of the first shut-off valve communicates with a port of the first branch, 3 . The second port of the first shut-off valve communicates with another port of the first branch; and/or the thermal management system includes a second shut-off valve, the first port of the second shut-off valve is connected to the One port of the second branch is in communication, and the second port of the second shut-off valve is in communication with the other port of the second branch.

4. The thermal management system of claim 1, wherein the coolant system comprises a first valve member, the first valve member has three connection ports, and the first connection port of the first valve member can It communicates with the second connection port of the first valve member or communicates with the third connection port of the first valve member, the first connection port of the first valve member communicates with a port of the first branch, and the first The second connection port of a valve element communicates with one port of the cooling liquid flow passage of the first heat exchanger, and the third connection port of the first valve element and the cooling liquid flow passage of the first heat exchanger The other port of the first branch communicates with the other port of the first branch; when the first connection port of the first valve element is communicated with the second connection port of the first valve element, the first branch is connected to the first valve member forms the first circuit;

The cooling liquid system includes a second valve member, the second valve member has three connection ports, and the first connection port of the second valve member can communicate with the second connection port of the second valve member or communicate with the second connection port of the second valve member. The third connection port of the second valve member is in communication, the first connection port of the second valve member can be communicated with a port of the second branch, and the second connection port of the second valve member is connected to the second valve member. One port of the cooling liquid flow channel is in communication, and the third connection port of the second valve member and the other port of the cooling liquid flow channel are in communication with the other port of the second branch; the second valve When the first connection port of the valve element communicates with the second connection port of the second valve element, the second branch and the second valve element form the second circuit.

5. The thermal management system according to claim 3 or 4, wherein the pump comprises a first pump and a second pump, the first pump is disposed in the first branch, and the second pump set on the second branch;

The first branch circuit includes the fourth heat exchanger, and the fourth heat exchanger is arranged in series with the second heat exchanger and the first pump, or the fourth heat exchanger and The second heat exchanger is arranged in series with the first pump after being arranged in parallel;

And/or, the second branch includes the fourth heat exchanger, and the fourth heat exchanger is arranged in series with the third heat exchanger and the second pump, or the fourth heat exchanger is The heat exchanger and the third heat exchanger are arranged in parallel and then arranged in series with the second pump.

6 . The thermal management system according to claim 5 , wherein in the direction of gravity, the heights of the two ports of the first branch are higher than the cooling liquid flow passages of the first heat exchanger, and the The heights of the two ports of the second branch are higher than the cooling liquid flow passages of the first heat exchanger.

7 . The thermal management system according to claim 1 , wherein the thermal management system comprises a fifth heat exchanger, and the fifth heat exchanger comprises a refrigerant flow channel and a cooling liquid flow channel. 8 . , the outlet of the compressor is communicated with the inlet of the refrigerant flow passage of the fifth heat exchanger; the thermal management system includes a third circuit, the third circuit includes the third pump, the fifth The cooling liquid flow channel of the heat exchanger and the sixth heat exchanger, the third pump, the cooling liquid flow channel of the fifth heat exchanger and the sixth heat exchanger are connected in series, and the third pump The cooling liquid can be driven to flow in the third circuit; the sixth heat exchanger is arranged in the air conditioning box of the vehicle, and the fifth heat exchanger is arranged outside the air conditioning box of the vehicle;

The third circuit can exchange heat with the second circuit or the first circuit.

8 . The thermal management system according to claim 7 , wherein the thermal management system further comprises a first communication line and a second communication line, the thermal management system at least comprises a circulation mode, and in the circulation In the mode, part of the cooling liquid of the third circuit can flow into the second circuit through the first communication pipeline, mixed with the cooling liquid of the second circuit, and part of the mixed cooling liquid of the second circuit can pass through The second communication line flows into the third circuit.

9 . The thermal management system of claim 8 , wherein the third circuit comprises a third branch, and the third branch comprises the cooling of the third pump and the fifth heat exchanger. 10 . a liquid flow channel and a sixth heat exchanger, the third pump, the cooling liquid flow channel of the fifth heat exchanger and the sixth heat exchanger are connected in series;

The coolant system further includes a third valve member, the third valve member includes a first interface and a second interface, the third valve member can open or block the first interface of the third valve member and the second interface. The communication passage between the second ports of the third valve element, the first port of the third valve element communicates with the first communication pipeline, and the second port of the third valve element communicates with the second branch One end of the road is in communication or one end of the third branch is in communication; or the third valve member includes a first port, a second port and a third port, and the third valve member can open or block the first valve The first port of the third valve member and the third port of the third valve member or the communication passage between the first port and the second port, the first port of the third valve member, the third port of the third valve member The second interface communicates with both ends of the second branch or the third branch, respectively, and the third interface of the third valve member communicates with the corresponding branch through the first communication pipeline;

And/or the thermal management system further includes a fourth valve member, the fourth valve member also includes a first interface and a second interface, and the fourth valve member can open or block the first port of the second valve member. The communication passage between the interface and the second interface of the fourth valve member, the first interface of the fourth valve member is in communication with the second communication pipeline, and the second interface of the fourth valve member is connected to the first interface of the fourth valve member. The second circuit is in communication or the third circuit is in communication; or the fourth valve member includes a first port, a second port and a third port, and the fourth valve member can open or block the first port of the second valve member and the The third port of the fourth valve member and/or the communication passage between the first port of the second valve member and the second port of the fourth valve member, the first port of the fourth valve member, the first port of the fourth valve member, the The second interface is communicated with both ends of the second branch or the third branch, respectively, and the third interface of the fourth valve element is communicated with the corresponding branch through the second communication pipeline.

10. The thermal management system of claim 7, wherein the cooling liquid system comprises a seventh heat exchanger, the seventh heat exchanger comprises a first flow channel and a second flow channel, the seventh heat exchanger The first flow passage of the heat exchanger is part of the third circuit, and the second flow passage of the seventh heat exchanger is part of the second circuit;

The cooling liquid system further includes a bypass pipeline; the bypass pipeline is arranged in the third circuit, and the third circuit is arranged in parallel with the first flow channel of the seventh heat exchanger; or the bypass pipeline The through pipeline is arranged in the second circuit, and the bypass pipeline is arranged in parallel with the second flow channel of the seventh heat exchanger.