CN112519528A

CN112519528A - Thermal management system

Info

Publication number: CN112519528A
Application number: CN201911110153.0A
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
Anticipated expiration: 2039-11-14
Also published as: CN112519529A; CN112519528B

Abstract

The invention discloses a heat management system, which comprises a refrigerant system, a cooling liquid system and a fourth heat exchanger, wherein the fourth heat exchanger is arranged in the cooling liquid system, and can absorb heat from air and release heat to the air, so that the performance of the heat management system is improved.

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, a first heat exchanger and a throttling device, wherein an outlet of the compressor can be communicated with a refrigerant inlet of the first heat exchanger; the heat management system further comprises a double-channel heat exchanger, the double-channel heat exchanger comprises a refrigerant channel and a cooling liquid channel, and the throttling device can be communicated with an inlet of the compressor through the refrigerant channel of the double-channel heat exchanger;

the cooling liquid system comprises a second heat exchanger and/or a third heat exchanger, a cooling liquid flow channel of the double-flow-channel heat exchanger, a pump and a fourth heat exchanger, and the fourth heat exchanger is arranged outside an air-conditioning box of the vehicle;

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

in a first cooling mode of the thermal management system, the pump is turned on and at least one of the second heat exchanger and the third heat exchanger is in communication with the pump and the fourth heat exchanger.

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, and the fourth heat exchanger is arranged in the cooling liquid system to provide a new way for the heat management system to absorb and release the heat, so that the heating and refrigerating performances of the heat management system are 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;

FIG. 8 is a schematic connection diagram of an eighth 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 cooling liquid system, wherein a refrigerant of the refrigerant system and a cooling liquid of the cooling liquid system are isolated from each other and do not flow, the refrigerant system includes a compressor 10 and a first heat exchanger 101, the refrigerant system further includes two throttling devices, namely a first throttling device 204 and a second throttling device 208, and an outlet of the compressor is communicated with a refrigerant inlet of the first heat exchanger 101. The heat management system further comprises a first dual-channel heat exchanger 104, the first dual-channel heat exchanger 104 is provided with a refrigerant channel and a cooling liquid channel, the refrigerant flowing through the refrigerant channel and the cooling liquid flowing through the cooling liquid channel can exchange heat in the first dual-channel heat exchanger 104, an inlet of the refrigerant channel of the first dual-channel heat exchanger 104 is communicated with the first throttling device 204, and an outlet of the refrigerant channel of the first dual-channel heat exchanger 104 is communicated with a suction port of the compressor 10 or communicated with an inlet of the compressor 10 through a gas-liquid separator 207. The heat management system further comprises a second dual-flow-channel heat exchanger 109, the second dual-flow-channel heat exchanger 109 is provided with a refrigerant flow channel and a cooling liquid flow channel, the refrigerant flowing through the refrigerant flow channel and the cooling liquid flowing through the cooling liquid flow channel can exchange heat in the second dual-flow-channel heat exchanger 109, an inlet of the refrigerant flow channel of the second dual-flow-channel heat exchanger 109 is communicated with a second throttling device 208, and an outlet of the refrigerant flow channel of the second dual-flow-channel heat exchanger 109 is communicated with a suction port of the compressor 10 or communicated with an inlet of the compressor 10 through a gas-liquid. 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 cooling liquid flow channel of the first dual-flow-channel heat exchanger 104, the second heat exchanger 106 and the first pump 502, the cooling liquid flow channel of the first dual-flow-channel heat exchanger 104, the second heat exchanger 106 and the first pump 502 are serially communicated to form the first loop, the first pump 502 can drive the 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 cooling liquid flow channel of the second dual-flow-channel heat exchanger 109, 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 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. Two ports of the second branch are respectively communicated with two ports of a cooling liquid flow passage of the second dual-flow passage heat exchanger 109;

in an embodiment of the present invention, the fourth heat exchanger 107 is disposed in the first loop, or the fourth heat exchanger 107 is a part of the first loop, 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 aspects of the invention, the fourth heat exchanger 107 may be disposed in the second circuit and will not be described in detail. Alternatively, the first loop and the second loop may share the fourth heat exchanger 107, for example, when the first loop needs to dissipate heat, the first loop is communicated with the fourth heat exchanger 107, and when the second loop needs to dissipate heat, the second loop is communicated with the fourth heat exchanger 107. Of course, the coolant system may also comprise two fourth heat exchangers 107, one of which is arranged in the first circuit and the other of which is arranged in the second circuit.

The refrigerant system comprises a first throttling unit 205, a seventh heat exchanger 103 and a first valve device 201, wherein the seventh heat exchanger 103 at least comprises a first port and a second port, the first throttling unit 205 is communicated with the second port of the seventh heat exchanger 103, a refrigerant inlet of the first heat exchanger 101 is communicated with an outlet of the compressor 10, a refrigerant outlet of the first heat exchanger 101 is communicated with the first valve device 201, a refrigerant outlet of the first heat exchanger 101 can be communicated with the first throttling unit 205 through the first valve device 201, the first heat exchanger 101 can also be communicated with the first throttling device 204 and/or the second throttling device 208 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 second throttling unit 202, the second throttling unit 202 being capable of communicating with an inlet of the eighth heat exchanger 102, an outlet of the eighth heat exchanger 102 communicating 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 first heat exchanger 101, a second communication port communicating with the suction port of the compressor 10, a third communication port capable of communicating with at least one of the first throttling unit 205, the first throttling device 204, the second throttling device 208 and the second throttling unit 202, 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 the communication passage of the first communication port and the third communication port, closes the communication passage of 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 the communication passage of 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 first 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 first throttling unit 205, or a second communication port can be communicated with the second port of the seventh heat exchanger 103 through the first throttling unit 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 towards the direction of the second port of the seventh heat exchanger 103, or an inlet of the one-way element 206 is communicated with the second port of the seventh heat exchanger 103. In addition, the first throttling unit 205 may also use a throttling device 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 second throttling device 208 and the first throttling device 204 may be a thermal expansion valve, an electronic expansion valve, or a capillary tube, etc. which can regulate the refrigerant flowing through; 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, which is more compact, such as the assembly formed by integrating the second throttling unit 202 and the eighth 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 second dual-flow-channel heat exchanger 109, the water kettle 108 and the second pump 501 are communicated with the third heat exchanger 105 in series, and at this time, the cooling liquid in the water kettle 108 participates in the flow of the cooling liquid system in the second loop. In other embodiments, the kettle 108 may be in communication with the second circuit only, and participate in the flow of the cooling fluid in the second circuit. 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 first 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. The air inlet side of the first heat exchanger 101 is further provided with a temperature air door 302, when the thermal management system further comprises an eighth heat exchanger 102, the first heat exchanger 101 and the eighth heat exchanger 102 can be arranged on the air conditioner box body at a certain distance, or the temperature air door 302 is arranged between the first heat exchanger 101 and the eighth heat exchanger 102, when the temperature air door 302 is opened, air blown in from an inner circulation air port or an outer circulation air port exchanges heat with the first heat exchanger 101, 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 first heat exchanger 101, and the air flows through channels on two sides of the temperature air door 302 and then enters the interior of the vehicle through an air channel. 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. Wherein 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 first heat exchanger 101 is insufficient, or the heat absorbed by the thermal management system from the seventh heat exchanger 103 is insufficient to provide the heat required by the room, the thermal 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 unit 205 and the first throttling device 204 are opened, the refrigerant of the thermal management system is compressed by the compressor 10 and then becomes the high-temperature and high-pressure refrigerant, the temperature damper 302 is opened, the high-temperature and high-pressure refrigerant exchanges heat with the ambient air in the first heat exchanger 101, and the refrigerant of the first heat exchanger 101 releases heat to the ambient air. The flow path of the refrigerant outlet of the first heat exchanger 101 leading to the second port of the seventh heat exchanger 103 and the refrigerant flow paths of the first dual-flow heat exchanger 104 and the second dual-flow heat exchanger 109 are communicated, and the flow path leading to the eighth heat exchanger 102 is cut off. Correspondingly, the refrigerant enters the seventh heat exchanger 103 after being throttled by the first throttling unit 205, the refrigerant with low temperature and low pressure exchanges heat with the air around the seventh heat exchanger 103 to absorb the heat of the air, the refrigerant can return to the compressor 10 after flowing out of the seventh heat exchanger 103, and the refrigerant with low temperature and low pressure enters the compressor 10 and is compressed into the refrigerant with high temperature and high pressure again by the compressor 10, and the cycle is operated. The refrigerant flowing through the refrigerant channels of the first dual channel heat exchanger 104 exchanges heat with the coolant of the coolant system, and then enters the compressor where it is compressed again. The case of the second dual flow channel heat exchanger 109 is the same as the case of the first dual flow channel heat exchanger 104 and will not be described in detail. In this embodiment, the first throttling device 204 and the second throttling device 208 are both open, and the first dual flow heat exchanger 104 and the second dual flow heat exchanger are both engaged. Of course, in other embodiments, only one of the first and second throttle devices may be turned on. Because the requirement of heating equipment such as a motor and the like on temperature control precision is not high, the first throttling device can be a thermal expansion valve with a cut-off function, and thus the cost can be reduced. The second throttle means may be an electronic expansion valve so that the temperature of the battery or the like can be accurately controlled.

Taking the heat exchange between the first loop and the refrigerant of the first dual-flow-channel heat exchanger 104 as an example, heat exchange is performed between heating equipment such as a motor and the second heat exchanger 106, the cooling liquid in the second heat exchanger 106 absorbs heat of the heating equipment such as the motor, the heat management system obtains the heat absorbed by the second heat exchanger 106 from the heating equipment such as the motor through the first dual-flow-channel heat exchanger 104, and the heat is released to the air-conditioning box through the first 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 equipment such as the. 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 thermal management system is able to absorb heat from the air through the fourth heat exchanger 107, which corresponds to increasing the heat exchange area of the seventh heat exchanger 103. Because the specific heat capacity of the cooling liquid is larger than that of air, the temperature change amplitude is smaller, and the control of the superheat degree of the first dual-channel heat exchanger 104 is relatively easier than that of the seventh heat exchanger 103; in addition, the double-flow-passage heat exchanger is small in size, short in flow passage and better in oil return performance.

In winter, the outside temperature of some areas is low, when the outside temperature is lower than zero or close to zero, the surface of the seventh heat exchanger 103 is prone to frost or ice or to malfunction, and further the energy efficiency of the operation of the heat management system is affected or even heating performance is lost, the heat management system enters the second heating mode, the first valve device 201 is in the second working state, at least one of the first throttling device and the second throttling device is opened, the refrigerant discharged by the first heat exchanger 101 enters the first throttling device 204 and/or the second throttling device 208 after passing through the first valve device 201, the second throttling unit 202 is closed, the heat management system absorbs the heat of the heating devices such as air and a motor through the first loop and/or absorbs the heat of the heating devices such as air and a battery through the second loop, compared with the first heating mode, the refrigerant flowing through the first dual-flow-channel heat exchanger can absorb the heat from the cooling liquid in the first loop, or the refrigerant flowing through the second dual flow heat exchanger can absorb heat from within the second circuit. When the seventh heat exchanger 103 cannot effectively absorb 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 absorbs heat through the seventh heat exchanger 103 and then releases the heat at the first heat exchanger 101, which will not be described in detail.

In a first cooling mode of the thermal management system, the compressor 10 is turned off, taking the first loop as an example, when the temperature of the heat generating devices such as the motor and the like is high and needs to be reduced, the first pump 502 is turned on to make the coolant in the first loop flow in the first loop, the heat of the heat generating devices such as the motor and the like is released to the coolant and finally released to the air through the fourth heat exchanger 107, and at this time, the heat generating devices such as the battery and the like can be cooled through the first dual-flow-channel heat exchanger 104, and the heat generating devices such as the battery and the like cool themselves or dissipate heat through the other fourth heat exchanger. 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. In the first cooling 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 may absorb heat in the air through the fourth heat exchanger 107, and in the first cooling mode of the thermal management system, the thermal management system may 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.

Referring to fig. 2, the refrigerant system may also be provided with only one throttling device 204', i.e., only one of the first throttling device and the second throttling device. Specifically, the refrigerant system includes a first valve element 2003, in this embodiment, the first valve element 2003 is a three-way valve, the first valve element 2003 has three connection ports, a first connection port of the first valve element 2003 can be communicated with a second connection port of the first valve element 2003 and/or communicated with a third connection port of the first valve element 2003, the first valve element may be a three-way switching valve or a three-way flow rate adjusting valve, the first connection port of the first valve element 2003 is communicated with a first port of a throttling device 204 ', a second port of the throttling device 204' is communicated with an outlet of a one-way element 206, the second connection port of the first valve element 2003 is communicated with a refrigerant inlet of the first two-flow-path heat exchanger 104, and the third connection port of the first valve element 2003 is communicated with an inlet of a refrigerant flow path of the second two-flow-path heat. When the first connection port of the first valve element 2003 is communicated with the third connection port of the first valve element 2003 and the first connection port of the first valve element 2003 is not communicated with the second connection port, the second pump 501 is turned on, the first pump 502 is turned off, the first dual-flow-passage heat exchanger 104 does not operate, and the refrigerant and the coolant of the second circuit exchange heat in the second dual-flow-passage heat exchanger 109. When the first connection port of the first valve element 2003 is not communicated with the third connection port and the first connection port of the first valve element 2003 is communicated with the second connection port, the second pump 501 is closed, the first pump 502 is opened, the refrigerant and the coolant of the first circuit exchange heat in the first dual-flow-channel heat exchanger 104, and the second dual-flow-channel heat exchanger does not operate. In other embodiments, the first valve member 2003 may also be a combination of two shut-off valves or flow regulating valves, which will not be described in detail. Compared with the embodiment shown in fig. 1, the thermal management system can save one expansion valve, and the cost is relatively reduced. In order to control the operation of the first dual-flow-channel heat exchanger and the second dual-flow-channel heat exchanger conveniently when the first throttling device and the second throttling device are thermal expansion valves or capillary tubes, the refrigerant system may be provided with a first valve element 2003, wherein a first connection port of the first valve element 2003 is communicated with an outlet of the one-way element 206, a second connection port of the first valve element is communicated with a refrigerant inlet of the first dual-flow-channel heat exchanger 104 through the first throttling device 204, and a third connection port of the second valve element is communicated with a refrigerant inlet of the second dual-flow-channel heat exchanger 109 through the second throttling device 208, and a detailed operation manner is not described in detail.

Referring to fig. 3, the first heat exchanger 101 is a two-channel heat exchanger, for example, the first heat exchanger 101 is a plate heat exchanger, the first 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 first heat exchanger 101, and the high-temperature and high-pressure refrigerant can release heat in the refrigerant channel of the first 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 flow channel of the first heat exchanger 101 and a sixth heat exchanger 1001, and the third pump 503, the cooling liquid flow channel of the first heat exchanger 101 and the sixth heat exchanger 1001 are communicated in series; sixth heat exchanger 1001 is disposed inside an air conditioning compartment of a vehicle, and first heat exchanger 101 is disposed outside the air conditioning compartment of the vehicle. Referring to fig. 4, 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.

The third circuit comprises a third branch comprising a third pump 503, the coolant flow path of the first heat exchanger 101 and the sixth heat exchanger 1001 in series, or in a broken version of the third circuit. The coolant system comprises a third valve element 401, the third valve element 401 comprises a first interface 4011, a second interface 4012 and a third interface 4013, the third valve element 401 can open or close a communication passage between the first interface 4011 and the third interface 4013 or between the first interface 4011 and the second interface 4012, the first interface 4011 of the third valve element 401, the second interface 4012 of the third valve element 401 are communicated with two ends of a third branch, the third interface 4013 of the third valve element 401 is communicated with one end of a second communication pipeline 52, and the other end of the second communication pipeline 52 is communicated with one end of a second branch. Both ends of the first communicating pipe 51 communicate with the respective other ends of the second branch and the third branch. The thermal management system may control whether the second circuit exchanges coolant with the third circuit through the third valve element 401, for example, when the first interface 4011 of the third valve element 401 is communicated with the second interface 4012, and when the first interface 4011 of the third valve element 401 is not communicated with the third interface 4013, the coolant in the third circuit flows in the third circuit. When the heat exchange is needed 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 first heat exchanger 101 is used to increase the heat of a heat generating device such as a battery, or the heat of the heat generating device such as the battery is used to heat the passenger compartment, the first interface 4011 and the second interface 4012 of the third valve element 401 are controlled not to be communicated, the first interface 4011 and the third interface 4013 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. Alternatively, the heat of the third circuit is released in the second circuit through the first and

second communication pipes

51 and 52 to increase the temperature of the heat generating device 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. 5. The coolant system comprises a third two-flow heat exchanger 2001, the third two-flow heat exchanger 2001 comprising a first flow channel and a second flow channel, the first flow channel of the third two-flow heat exchanger 2001 being part of a third circuit, the second flow channel of the third two-flow heat exchanger 2001 being part of a second circuit, the coolant of the second circuit and the coolant of the third circuit being capable of heat exchange in the third two-flow 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 comprises a bypass line 53 and a second valve 404, the bypass line 53 and the second valve 404 are arranged in the third loop, the bypass line 53 is arranged in parallel with the first flow channel of the third two-flow heat exchanger 2001, and the bypass line 53 bypasses the first flow channel of the third two-flow heat exchanger 2001 by controlling the second valve 404; of course, the bypass line 53 and the second valve 404 may also be provided in the second circuit, and the bypass line 53 can bypass the second flow passage of the third two-flow heat exchanger 2001, which will not be described in detail. The heat management system is provided with a bypass pipeline 53 and a second valve element 404, 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. 3, the thermal management system includes the first dual-channel heat exchanger 104 without the second dual-channel heat exchanger 109, the third heat exchanger 105 is disposed in the first loop, or the first loop includes the third heat exchanger 105, in this embodiment, the second heat exchanger 106 and the third heat exchanger 105 are in serial communication, and in other embodiments, the second heat exchanger 106 and the third heat exchanger 105 may also be in parallel connection and then in serial communication with the first pump 502. Referring to fig. 7, the second heat exchanger 106 and the third heat exchanger 105 are serially or parallelly connected and then parallelly connected to the coolant flow path of the first dual-flow-path heat exchanger 104, and then serially connected to the first pump 502 and the fourth heat exchanger. The second heat exchanger and the third heat exchanger are arranged in the same loop, and the heat management system has the advantage of relative simplicity.

Referring to fig. 8, in the present embodiment, the fourth heat exchanger 107 is disposed in the first branch; of course, the fourth heat exchanger 107 may also be disposed in the second branch, or both the first branch and the second branch may be disposed with the fourth heat exchanger 107. Compared to the embodiment illustrated in fig. 3, the coolant system includes a second valve element 402, in this 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 two-flow-passage heat exchanger 104, and the other port of the second branch passage and the other port of the coolant flow passage of the first two-flow-passage 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 dual-channel heat exchanger 104 is not communicated with the second loop; when the first connection port of the second valve member 402 is not communicated with the third connection port and the first connection port of the second valve member 402 is communicated with the second connection port, the coolant flow passage of the first dual-passage heat exchanger 104 is communicated with the first branch passage, that is, the coolant flow passage of the first dual-passage 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 dual-flow-channel 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 dual-flow-channel heat exchanger 104 can be communicated with the first branch or the second branch" means that the coolant in the coolant flow channel of the first dual-flow-channel heat exchanger 104 can flow into and out of the first branch or the second branch, or the coolant in the first branch or the second branch can flow into and out of the coolant flow channel of the first dual-flow-channel heat exchanger 104.

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 two-flow-passage 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 two-flow-passage 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 coolant flow channel of the first dual-flow-channel 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 dual-flow-channel 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 dual-flow-channel 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. At this time, the coolant flow passage of the first dual flow passage heat exchanger 104 may be communicated with the first circuit or the coolant flow passage of the first dual flow passage 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 coolant flow channel of the first branch and the first dual-flow-channel heat exchanger 104 as an example, heat exchange is performed between the heating equipment such as the motor and the second heat exchanger 106, the coolant in the second heat exchanger 106 absorbs heat of the heating equipment such as the motor, the refrigerant flowing through the first dual-flow-channel heat exchanger 104 obtains the heat absorbed by the second heat exchanger 106 from the heating equipment such as the motor through the first dual-flow-channel 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 equipment such as the. When the fourth heat exchanger 107 is also arranged in the first loop, the fourth heat exchanger 107 can absorb heat from ambient air, which is equivalent to increase the heat exchange area of the seventh heat exchanger, and is beneficial to improving the heat exchange performance. Similarly, the heat absorbed by the second heat exchanger 106 from the heat generating device such as the motor may be released by the fourth heat exchanger 107 to lower the temperature of the heat generating device such as the motor.

The refrigerant suitable for the refrigerant system can be conventional refrigerant such as 134a, and can also be refrigerant with supercritical state such as CO2, if the refrigerant system adopts CO2 as refrigerant, the eighth heat exchanger 102 can be a double-channel heat exchanger, and then the eighth heat exchanger 102 is arranged outside the air-conditioning box, so that the refrigerant system is completely arranged outside the air-conditioning box, and the damage to the health of passengers when CO2 escapes is favorably prevented; because the working pressure of the CO2 is high, the parts of the refrigerant system working in a high-pressure state are positioned outside the air conditioning box, and the damage to passengers caused by the explosion of the parts due to accidents is also prevented.

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 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, a first heat exchanger and a throttling device, wherein an outlet of the compressor can be communicated with a refrigerant inlet of the first heat exchanger; the heat management system further comprises a double-channel heat exchanger, the double-channel heat exchanger comprises a refrigerant channel and a cooling liquid channel, and the throttling device can be communicated with an inlet of the compressor through the refrigerant channel of the double-channel heat exchanger;

2. The thermal management system of claim 1, wherein the dual-flow heat exchanger comprises a first dual-flow heat exchanger and a second dual-flow heat exchanger, the throttling device being communicable with the inlet of the compressor through the refrigerant flow passages of the first dual-flow heat exchanger, the throttling device also being communicable with the inlet of the compressor through the refrigerant flow passages of the second dual-flow heat exchanger;

the coolant system including a first loop and a second loop, the first loop including coolant flow passages of the second heat exchanger and the first dual-flow heat exchanger, the second loop including coolant flow passages of the third heat exchanger and the second dual-flow heat exchanger, the coolant system including at least one fourth heat exchanger, at least one of the first loop and the second loop including the fourth heat exchanger;

in a heating mode of the thermal management system, at least one of the coolant flow path of the first dual flow heat exchanger and the coolant flow path of the second dual flow heat exchanger is in communication with the fourth heat exchanger and the pump.

3. The thermal management system of claim 2, comprising a first valve member having three connection ports and a throttling device, wherein a first connection port of the first valve member is capable of communicating with a second connection port of the first valve member and/or with a third connection port of the first valve member, wherein the first connection port of the first valve member is in communication with a first port of the throttling device, wherein the second connection port of the first valve member is in communication with an inlet of a refrigerant flow passage of the first dual-flow passage heat exchanger, and wherein the third connection port of the first valve member is in communication with an inlet of a refrigerant flow passage of the second dual-flow passage heat exchanger; the outlet of the refrigerant flow channel of the first double-flow-channel heat exchanger and the outlet of the refrigerant flow channel of the second double-flow-channel heat exchanger are communicated with the inlet of the compressor.

4. The thermal management system of claim 2, wherein the throttling device comprises a first throttling device in communication with an inlet of the refrigerant flow path of the first dual flow path heat exchanger and a second throttling device in communication with an inlet of the refrigerant flow path of the first dual flow path heat exchanger, wherein an outlet of the refrigerant flow path of the first dual flow path heat exchanger and an outlet of the refrigerant flow path of the second dual flow path heat exchanger are in communication with an inlet of the compressor.

5. The thermal management system of claim 4 comprising a first valve element having three ports, the first port of the first valve element being capable of communicating with the second port of the first valve element and/or with the third port of the first valve element, the second port of the first valve element being capable of communicating with the refrigerant inlet of the first dual flow path heat exchanger through the first throttling device, the third port of the first valve element being capable of communicating with the refrigerant inlet of the second dual flow path heat exchanger through the second throttling device.

6. The thermal management system of any of claims 1-5, wherein said pump comprises a first pump and a second pump, said first pump disposed in said first circuit and said second pump disposed in said second circuit;

the first loop comprises the fourth heat exchanger, and the fourth heat exchanger is arranged in series with the cooling liquid flow channels of the second heat exchanger, the first pump and the first dual-flow-channel heat exchanger;

and/or the second loop comprises the fourth heat exchanger, and the fourth heat exchanger is arranged in series with the coolant flow channels of the third heat exchanger, the second pump and the second dual-flow-channel heat exchanger.

7. The thermal management system of claim 6, wherein the first heat exchanger includes a refrigerant flow passage and a coolant flow passage, an outlet of the compressor communicating with an inlet of the refrigerant flow passage of the first heat exchanger; the heat management system comprises a third loop, wherein the third loop comprises a third pump, a cooling liquid flow passage of the first heat exchanger and a sixth heat exchanger, the third pump, the cooling liquid flow passage of the first heat exchanger and the sixth heat exchanger are communicated in series, and the third pump can drive cooling liquid to flow in the third loop; the sixth heat exchanger is arranged in an air-conditioning box of the vehicle, and the first heat exchanger is arranged outside the air-conditioning box of the vehicle;

the third circuit is capable of heat exchange with either the second circuit or the first circuit.

8. The thermal management system of claim 7, wherein the coolant system comprises a third dual-flow heat exchanger comprising a first flow passage and a second flow passage, the first flow passage of the third dual-flow heat exchanger being part of a third circuit, the second flow passage of the third dual-flow heat exchanger being part of the second circuit;

the cooling liquid system also comprises a bypass pipeline and a second valve piece; the bypass line and the second valve element are arranged in the third loop, and the bypass line is arranged in parallel with the first flow channel of the third double-flow-channel heat exchanger; or the bypass pipeline and the second valve element are arranged in a second loop, and the bypass pipeline and the second flow channel of the third double-flow-channel heat exchanger are arranged in parallel.

9. The thermal management system of claim 7, further comprising a first communication conduit and a second communication conduit, the thermal management system including at least a circulation mode in which a portion of the coolant of the third circuit is able to flow into the second circuit through the first communication conduit, mixing with the coolant of the second circuit, and the mixed portion of the coolant of the second circuit is able to flow into the third circuit through the second communication conduit.

10. The thermal management system of claim 9, wherein the first circuit comprises a first branch, the second circuit comprises a second branch having two ports, the second branch comprising a third heat exchanger and a second pump;

the third loop comprises a third branch, the third branch comprises the third pump, a cooling liquid channel of the first heat exchanger and a sixth heat exchanger, and the third pump, the cooling liquid channel of the first heat exchanger and the sixth heat exchanger are communicated in series;

the cooling liquid system further comprises a third valve element, the third valve element comprises two interfaces, the third valve element can open or close a communication passage between a first interface of the third valve element and a second interface of the third valve element, the first interface of the third valve element is communicated with the first communication passage, and the second interface of the third valve element is communicated with one end of the second branch or one end of the third branch; or the third valve element comprises a first interface, a second interface and a third interface, the third valve element can open or close a communication passage between the first interface of the third valve element and the third interface of the third valve element or between the first interface and the second interface, the first interface of the third valve element and the second interface of the third valve element are respectively communicated with two ends of the second branch or the third branch, and the third interface of the third valve element is communicated with the corresponding branch through the first communication pipeline;

and/or the thermal management system further comprises a fourth valve element, the fourth valve element also comprises two interfaces, the fourth valve element can open or close a communication passage between a first interface of the fourth valve element and a second interface of the fourth valve element, the first interface of the fourth valve element is communicated with the second communication pipeline, and the second interface of the fourth valve element is communicated with the second circuit or the third circuit; or the fourth valve comprises a first interface, a second interface and a third interface, the fourth valve can open or close a communication passage between the first interface of the fourth valve and the third interface of the fourth valve and/or between the first interface of the fourth valve and the second interface of the fourth valve, the first interface of the fourth valve and the second interface of the fourth valve are respectively communicated with two ends of the second branch or the third branch, and the third interface of the fourth valve is communicated with the corresponding branch through the second communication pipeline.