Thermal management device and control method thereof and vehicle having the same

Abstract

The present invention provides a thermal management device and a control method thereof and a vehicle having the same. The thermal management device comprises a first heat exchanger, a second heat exchanger and a third heat exchanger. The thermal management device is designed with a three-medium heat exchanger with high heat exchange efficiency as a core component. The piping connection is simple, the components are few, and the valve switching control is simple and stable. The complex structure and the distribution management problems of the refrigerant circulation system in the existing thermal management technical solutions are solved, and the energy recovery rate is high. The vehicle including the thermal management device of the present invention has an air-conditioning system with a simple structure, low cost, high heat recovery efficiency, improved battery and motor efficiency, a comfortable passenger cabin environment, good temperature and humidity control, and stable and energy-saving vehicle operation control.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchange air conditioning, and in particular relates to a thermal management device and a control method thereof, and a vehicle having the same. Background Art

[0002] The existing technology generally uses a two-medium heat exchanger to achieve efficient and stable heat exchange between the two medium channels A and B for heat exchange needs in environmental buildings, equipment components, industrial production, etc. However, with the increasing requirements for energy conservation and environmental protection, the complementary recycling of energy from multiple heat sources and multiple user ends has become the research direction of the industry; on the one hand, Chinese patent CN109291763A discloses "a heat pump air-conditioning system" that can perform cooling or heating according to user needs, and to a certain extent meet the different thermal management needs of various components and cabins of electric vehicles; however, this thermal management device with a two-medium heat exchanger as the core component has the problems of complex structure, great difficulty in controlling the refrigerant circulation, insufficient comprehensive recycling of multiple heat sources, many components, and low heat exchange efficiency, which is difficult to meet. Electric vehicle design requirements, especially the actual operating requirements of air conditioning heat dissipation in winter and summer; on the other hand, Chinese patent CN105180490B discloses "an integrated natural cooling room air conditioning system", which simplifies the structure of the air conditioning system, but due to the three-medium heat exchanger structure in the technical solution, it is impossible to achieve direct, unimpeded and efficient heat exchange between the three media. Although the system is simple, its heat energy recovery and utilization capacity is low; the inventor's previously submitted Chinese patent application 201821519297.2 discloses a heat exchanger that can perfectly achieve direct, unimpeded and efficient heat exchange between the three media. How to use this three-medium heat exchanger to design an efficient solution that meets thermal management needs is a problem that needs to be solved in this field. Summary of the invention

[0003] The purpose of the present invention is: on the one hand, to overcome the problems of complex structure and low heat exchange efficiency of thermal management system equipment in the prior art, and to provide a thermal management device; on the other hand, to solve the problems of instability, difficult operation control, and low heat energy complementary recovery rate of thermal management systems in the prior art, and to provide a control method for a "thermal management device"; on the other hand, to solve the defects of existing vehicle air-conditioning systems such as many components, complex pipelines, low energy efficiency, and high cost, which seriously affect the vehicle's operating performance, and to provide a vehicle with the aforementioned thermal management device.

[0004] The present invention provides a thermal management device, including a first heat exchanger, a second heat exchanger, and a third heat exchanger. The first heat exchanger is a three-medium heat exchanger, which has three medium channels 1A, 1B, and 1C that are not connected to each other, and the 1A-1B, 1A-1C, and 1B-1C channels in the three medium channels directly exchange heat without obstruction; the second heat exchanger includes two medium channels 2A and 2B that are not connected to each other, and the medium channels 2A and 2B directly exchange heat without obstruction; the third heat exchanger includes a 3A medium channel; the inlet and outlet of the medium channel 1A are correspondingly connected to the outlet and inlet of the medium channel 2A, forming a first circulation loop of the first medium 1N inside the thermal management device; the inlet and outlet of the medium channel 1C are correspondingly connected to the outlet and inlet of the medium channel 3A, forming a second medium 2N internal circulation loop of the thermal management device.

[0005] Preferably: the second heat exchanger of the thermal management device is a three-medium heat exchanger including a medium channel 2C, wherein the three medium channels 2A, 2B, and 2C therein are not interconnected, and there is no obstruction between the 2A-2B, 2A-2C, and 2B-2C channels in the three medium channels for direct heat exchange; the inlet and outlet of the medium channel 2C are correspondingly connected to the outlet and inlet of the medium channel 3A, forming the second medium 2N external circulation loop of the thermal management device; the thermal management device also includes a first valve arranged on the second medium 2N internal circulation loop and a second valve on the second medium 2N external circulation loop, and these two valves are used for switching, regulating and controlling the second medium 2N internal circulation loop and the second medium 2N external circulation loop.

[0006] Preferably: the thermal management device includes a throttling assembly and a compressor arranged on the first circulation loop of the first medium 1N; the medium channel 1A, the throttling assembly, the medium channel 2A, the compressor, and the medium channel 1A are connected in sequence to form a closed circulation structure of the gas-liquid phase change medium circulation; the thermal management device also includes an intake and exhaust reversing valve group (this component is well known to general technicians in this field and is not marked in the figure.), the intake port and the exhaust port of the compressor are connected to two interfaces of the intake and exhaust reversing valve group, and the other two interfaces of the intake and exhaust reversing valve group are respectively connected to the medium channel 1A and the medium channel 2A for switching between cooling and heating cycles.

[0007] Preferably: the thermal management device also includes a first pump arranged on the inner circulation loop of the second medium 2N, for enhancing the circulation of the second medium 2N; the medium channel 1B is provided with a fan or pump for enhancing the medium circulation, the medium channel 2B is provided with a fan or pump for enhancing the medium circulation, and the third heat exchanger is provided with a medium channel 3B, and the medium channel 3B is provided with a fan or pump for enhancing the medium circulation.

[0008] Preferably, the thermal management device further comprises a third pump disposed on the first circulation loop of the first medium 1N, for enhancing the circulation of the first medium 1N.

[0009] The present invention also provides a control method for a thermal management device, which is applied to the thermal management device described in any one of claims 1 to 5, and performs mode switching of heat exchange and heat energy recovery and utilization control on multiple heat sources and heat loads inside and outside the thermal management device.

[0010] Further: the control method of a thermal management device includes a heating mode a1, a heat recovery mode a2, a cooling mode b1, a defrosting mode b2, a constant temperature dehumidification mode b3, a heat pipe heating mode c1, and a heat pipe cooling mode c2, characterized in that: when the thermal management device is set in the heating mode a1, the intake and exhaust reversing valve group is reversed, and the first medium 1N is in the first circulation loop along the compressor, the intake and exhaust reversing valve group, the medium channel 1A, the throttling component, and the medium channel 2A , the intake and exhaust reversing valve group, and the compressor circulate in sequence, evaporate and absorb heat in the medium channel 2A, and after being pressurized and heated by the compressor, condense and release heat and cool in the medium channel 1A, and then throttle and reduce pressure and temperature through the throttling component, re-enter the medium channel 2A to start the next cycle, the heat exchange medium in the medium channel 1B obtains heat, the first valve is opened, the second valve is closed, and the first pump is running, the second medium 2N in the medium channel 1C obtains heat, and enters the medium channel 3A along the inner circulation loop through the first valve and the first pump to release heat; when the thermal management device is set to the heat recovery mode a2, the intake and exhaust reversing valve group is reversed, and the first medium 1N is in the first circulation loop, along the compressor, the intake and exhaust reversing valve group, the medium channel 1A, the throttling component, and the medium channel 2A , the suction and exhaust reversing valve group, and the compressor circulate in sequence, evaporate and absorb heat in the medium channel 2A, condense and release heat and cool down in the medium channel 1A after being pressurized and heated by the compressor, and then throttle and reduce pressure and cool down through the throttling component, re-enter the medium channel 2A to start the next cycle, and the heat exchange medium in the medium channel 1B obtains heat, the first valve is closed, the second valve is opened, and the first pump is running. The first pump drives the second medium 2N to obtain heat from the medium channel 3A, enter the medium channel 2C along the external circulation loop to release heat as the recovery heat source of the first circulation loop, and then pass through the second valve and are driven by the first pump again to start the next cycle, and the heat exchange medium in the medium channel 2B also serves as the second heat source of the first circulation loop; when the thermal management device is set in the refrigeration mode b1, the suction and exhaust reversing valve group is reversed, and the first medium 1N circulates in the first circulation loop along the compressor, the suction and exhaust reversing valve group, the medium channel 2A, the throttling component, the medium channel 1A, the suction and exhaust reversing valve group, and the compressor in sequence, condenses and releases heat and cools down in the medium channel 2A, After throttling and reducing pressure and temperature through the throttling component, it enters the medium channel 1A to evaporate and absorb heat, and after being pressurized and heated again by the compressor, the next cycle begins. The heat exchange medium in the medium channel 1B releases heat and cools down. The first valve is opened, the second valve is closed, and the first pump is running. The second medium 2N in the medium channel 1C releases heat and cools down. After entering the medium channel 3A along the inner circulation loop through the first valve and the first pump to absorb heat, it enters the medium channel 1C for circulation again, and the heat exchange medium in the medium channel 3B releases heat and cools down.When the thermal management device is set in the defrost mode b2, the intake and exhaust reversing valve group is reversed, and the first medium 1N is in the first circulation loop along the compressor, the intake and exhaust reversing valve group, the medium channel 2A, the throttling component, the medium channel 1A , the suction and exhaust reversing valve group, and the compressor circulate in sequence, condensing heat and releasing temperature in the medium channel 2A to realize the defrosting function, throttling and reducing pressure and cooling through the throttling component, entering the medium channel 1A to evaporate and absorb heat, and then entering the next cycle after being pressurized and heated by the compressor again. The first valve is opened, the second valve is closed, and the first pump is running. The first pump drives the second medium 2N to obtain heat from the medium channel 3A, enter the medium channel 1C along the inner circulation loop to release heat as the recovered heat source of the first circulation loop of the heat pump defrosting, and then pass through the first valve and are driven by the first pump again to start the next cycle. The heat exchange medium in the medium channel 1B also serves as the second heat source of the first circulation loop of the heat pump defrosting; when the thermal management device is set to the constant temperature dehumidification mode b3, the suction and exhaust reversing valve group is reversed, and the first medium 1N is in the first circulation loop along the compressor, the suction and exhaust reversing valve group, and the medium channel 2A , throttling component, medium channel 1A, suction and exhaust reversing valve group, and compressor direction are circulated in sequence. Condensation, heat release and temperature reduction are achieved in medium channel 2A. After throttling, pressure reduction and temperature reduction by the throttling component, the medium enters medium channel 1A to evaporate and absorb heat. The heat exchange medium in medium channel 1B is dehumidified and cooled. The first medium 1N is re-pressurized and heated by the compressor to enter the next cycle. The first valve is closed, the second valve is opened, and the first pump is running. The first pump drives the second medium 2N to obtain heat from medium channel 2C. The medium enters medium channel 3A along the external circulation loop through the second valve and the first pump to release heat. Then, the medium enters medium channel 2C to start the next cycle. The heat exchange medium in medium channel 1B after dehumidification and temperature reduction enters medium channel 2C. The heat is absorbed in the channel 3B to heat up and recover heat, realizing the constant temperature dehumidification function; when the thermal management device is set in the thermal management heating mode c1, the heat pump compressor of the first circulation loop does not run, the first valve is opened, the second valve is opened, and the first pump is running. The first pump drives the second medium 2N to obtain heat from the parallel medium channels 1C and 2C, and after passing through the first valve and the second valve along the inner circulation loop and the outer circulation loop respectively, it converges into the first pump, releases heat in the medium channel 3A, and then is divided into the parallel medium channels 1C and 2C to obtain heat, and the next cycle begins. The closing or opening of the first valve and the second valve is used for switching the inner circulation loop and the outer circulation loop;When the thermal management device is set in the heat pipe cooling mode c2, the heat pump compressor of the first circulation loop does not run, the first valve is opened, the second valve is opened, and the first pump is running. The first pump drives the second medium 2N to obtain heat from the medium channel 3A, and then enters the parallel inner circulation loop and outer circulation loop after diversion, releases heat in the medium channel 1C and the medium channel 2C, and then converges into the first pump after passing through the first valve (71) and the second valve (72) respectively, and starts the next cycle. The closing or opening of the first valve and the second valve is used to switch the inner circulation loop and the outer circulation loop, and the flow rate of the first pump is changed to adjust the heat exchange capacity of the second medium 2N. ;

[0011] The present invention also provides a vehicle, comprising the thermal management device as described in any one of the above items.

[0012] The present invention provides a thermal management device and a control method thereof, and a vehicle having the same, which have the following beneficial effects:

[0013] The present invention selects a three-medium heat exchanger that can directly and efficiently exchange heat between two media without obstruction as a core component, and adopts ingenious pipeline connection design, minimal valve switching and adjustment, and simplified system control, which solves the complex structure and refrigerant circulation system distribution management problems existing in existing thermal management technical solutions, has a high energy recovery rate, and realizes flexible coupling between circulation systems. A vehicle including the thermal management device of the present invention has an air-conditioning system with a simple structure, low cost, high heat recovery efficiency, improved battery and motor efficiency, a comfortable passenger cabin environment, better temperature and humidity control, and more stable and energy-saving vehicle operation control.

[0014] The three-medium heat exchanger described in the present invention can be a heat exchanger disclosed in Chinese patent application No. 201821519297.2 previously submitted by the inventor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a basic structural schematic diagram of a thermal management device of the present invention;

[0016] Figure 2 It is a schematic diagram of the heat pipe mode structure of a thermal management device of the present invention;

[0017] Figure 3 It is a schematic diagram of a building air conditioning application structure of a thermal management device of the present invention;

[0018] Figure 4 It is a schematic diagram of the vehicle air conditioning application structure of a thermal management device of the present invention;

[0019] The reference numerals in the figure are as follows: 1. first heat exchanger; 1A. first medium channel of first heat exchanger; 1B. second medium channel of first heat exchanger; 1C. third medium channel of first heat exchanger; 101. first circulation loop of first medium 1N; 2. second heat exchanger; 2A. first medium channel of second heat exchanger; 2B. second medium channel of second heat exchanger; 2C. third medium channel of second heat exchanger; 102. inner circulation loop of second medium 2N; 103. outer circulation loop of second medium 2N; 104. fourth circulation loop; 3. third heat exchanger; 3A. first medium channel of third heat exchanger; 3B. second medium channel of third heat exchanger; 31. motor heat exchange unit; 32. battery heat exchange unit; 33. vehicle control heat exchange unit; 4. throttling assembly; 5. compressor; 61. first pump; 62. second pump; 63. third pump; 71. first valve; 72. second valve; 73. third valve; 74. fourth valve; 8. fourth heat exchanger; DETAILED DESCRIPTION

[0020] The present invention provides a basic structure of a thermal management device as follows Figure 1 As shown, it comprises: a first heat exchanger (1), a second heat exchanger (2), and a third heat exchanger (3). The first heat exchanger (1) is a three-medium heat exchanger, and has three medium channels 1A, 1B, and 1C that are not connected to each other, and the three medium channels 1A-1B, 1A-1C, and 1B-1C channels are directly heat exchanged without obstruction; the second heat exchanger (2) comprises two medium channels 2A and 2B that are not connected to each other, and the medium channels 2A and 2B are directly heat exchanged without obstruction; the third heat exchanger (3) comprises a 3A medium channel; the inlet and outlet of the medium channel 1A are connected to the outlet and inlet of the medium channel 2A correspondingly, forming a first medium 1N first circulation loop (101) inside the thermal management device; the inlet and outlet of the medium channel 1C are connected to the outlet and inlet of the medium channel 3A correspondingly, forming a second medium 2N internal circulation loop (102) of the thermal management device.

[0021] The first heat exchanger (1) has a specially designed three medium channel structure and serves as the core component of the thermal management device. The first medium 1N first circulation loop (101) and the second medium 2N internal circulation loop (102) in the thermal management device are simply and efficiently coupled together through this core component, so that the heat exchange between the three external media through the first heat exchanger (1), the second heat exchanger (2) and the third heat exchanger (3) can be more stable and efficient.

[0022] Preferably: the second heat exchanger (2) of the thermal management device is a three-medium heat exchanger including a medium channel 2C, wherein the three medium channels 2A, 2B, and 2C therein are not interconnected, and the channels 2A-2B, 2A-2C, and 2B-2C in the three medium channels are directly heat exchanged without obstruction; the inlet and outlet of the medium channel 2C are correspondingly connected to the inlet and outlet of the medium channel 3A, forming a second medium 2N external circulation loop (103) of the thermal management device; the thermal management device further comprises a first valve (71) arranged on the second medium 2N internal circulation loop (102) and a second valve (72) on the second medium 2N external circulation loop (103), and the two valves are used for switching and regulating the second medium 2N internal circulation loop (102) and the second medium 2N external circulation loop (103).

[0023] Preferably: the thermal management device comprises a throttling assembly (4) and a compressor (5) arranged on the first circulation loop (101) of the first medium 1N; the medium channel 1A, the throttling assembly (4), the medium channel 2A, the compressor (5), and the medium channel 1A are connected in sequence to form a closed circulation structure for the circulation of the gas-liquid phase change medium; the thermal management device also comprises an intake and exhaust reversing valve group (this component is well known to those skilled in the art and is not shown in the figure), the intake port and the exhaust port of the compressor (5) are connected to two interfaces of the intake and exhaust reversing valve group, and the other two interfaces of the intake and exhaust reversing valve group are respectively connected to the medium channel 1A and the medium channel 2A, for switching between cooling and heating cycles.

[0024] The heat pump structure of the first medium 1N first circulation loop (101) of the thermal management device improves the thermal energy quality of the heat exchange medium between the first heat exchanger (1), the second heat exchanger (2) and the third heat exchanger (3), and can more efficiently recycle and utilize low-quality thermal energy to achieve heating and cooling functions.

[0025] Preferably, the thermal management device further comprises a first pump (61) arranged on the inner circulation loop (102) of the second medium 2N, for enhancing the circulation of the second medium 2N; a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 1B, a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 2B, and the third heat exchanger (3) is provided with a medium channel 3B, and a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 3B.

[0026] The fans or pumps mentioned above enhance the convection heat exchange intensity of the medium in the channel where they are located, thereby improving the heat exchange efficiency.

[0027] Preferably, the thermal management device further comprises a third pump (63) arranged on the first circulation loop (101) of the first medium 1N, for enhancing the circulation of the first medium 1N.

[0028] The third pump (63) is provided to ensure that Figure 2 The heat pipe structure mode shown has a high-efficiency heat exchange cycle of the first medium 1N first circulation loop (101).

[0029] The first medium 1N is a heat exchange medium having one of gas-liquid phase change cycle or liquid cycle properties, and the second medium 2N is a heat exchange medium having one of gas-liquid phase change cycle or liquid cycle properties.

[0030] The first pump (61), the second pump (62), and the third pump (63) are selected to be gas-liquid circulation pumps or liquid-liquid circulation pumps of corresponding types according to the properties of the circulating medium in the circulation loops in which they are located.

[0031] The medium channel 1B is a channel for heat exchange between the heat exchange medium 1W outside the thermal management device and the first medium 1N and the second medium 2N in the first heat exchanger (1) of the thermal management device;

[0032] The medium channel 2B is a channel for heat exchange between the heat exchange medium 2W outside the thermal management device and the first medium 1N and the second medium 2N in the second heat exchanger (2) of the thermal management device;

[0033] The second medium 2N circulating in the medium channel 3A exchanges heat with the heat exchange medium 3W outside the thermal management device through radiation, convection or conduction.

[0034] The present invention provides a building air conditioning application structure of a thermal management device as shown in Figure 3 As shown, it comprises: a first heat exchanger (1), a second heat exchanger (2), and a third heat exchanger (3). The first heat exchanger (1) is a three-medium heat exchanger, and has three medium channels 1A, 1B, and 1C that are not connected to each other, and the three medium channels 1A-1B, 1A-1C, and 1B-1C channels are directly heat exchanged without obstruction; the second heat exchanger (2) comprises two medium channels 2A and 2B that are not connected to each other, and the medium channels 2A and 2B are directly heat exchanged without obstruction; the third heat exchanger (3) comprises a 3A medium channel; the inlet and outlet of the medium channel 1A are connected to the outlet and inlet of the medium channel 2A correspondingly, forming a first medium 1N first circulation loop (101) inside the thermal management device; the inlet and outlet of the medium channel 1C are connected to the outlet and inlet of the medium channel 3A correspondingly, forming a second medium 2N internal circulation loop (102) of the thermal management device.

[0035] The first heat exchanger (1) has a specially designed three medium channel structure and serves as the core component of the thermal management device. The first medium 1N first circulation loop (101) and the second medium 2N internal circulation loop (102) in the thermal management device are simply and efficiently coupled together through this core component, so that the heat exchange between the three external media through the first heat exchanger (1), the second heat exchanger (2) and the third heat exchanger (3) can be more stable and efficient.

[0036] Preferably: the second heat exchanger (2) of the thermal management device is a three-medium heat exchanger including a medium channel 2C, wherein the three medium channels 2A, 2B, and 2C therein are not interconnected, and the channels 2A-2B, 2A-2C, and 2B-2C in the three medium channels are directly heat exchanged without obstruction; the inlet and outlet of the medium channel 2C are correspondingly connected to the inlet and outlet of the medium channel 3A, forming a second medium 2N external circulation loop (103) of the thermal management device; the thermal management device further comprises a first valve (71) arranged on the second medium 2N internal circulation loop (102) and a second valve (72) on the second medium 2N external circulation loop (103), and the two valves are used for switching and regulating the second medium 2N internal circulation loop (102) and the second medium 2N external circulation loop (103).

[0037] Preferably: the thermal management device comprises a throttling assembly (4) and a compressor (5) arranged on the first circulation loop (101) of the first medium 1N; the medium channel 1A, the throttling assembly (4), the medium channel 2A, the compressor (5), and the medium channel 1A are connected in sequence to form a closed circulation structure for the circulation of the gas-liquid phase change medium; the thermal management device also comprises an intake and exhaust reversing valve group (this component is well known to those skilled in the art and is not shown in the figure), the intake port and the exhaust port of the compressor (5) are connected to two interfaces of the intake and exhaust reversing valve group, and the other two interfaces of the intake and exhaust reversing valve group are respectively connected to the medium channel 1A and the medium channel 2A, for switching between cooling and heating cycles.

[0038] The heat pump structure of the first medium 1N first circulation loop (101) of the thermal management device improves the thermal energy quality of the heat exchange medium between the first heat exchanger (1), the second heat exchanger (2) and the third heat exchanger (3), and can more efficiently recycle and utilize low-quality thermal energy to achieve heating and cooling functions.

[0039] Preferably: the thermal management device further comprises a first pump (61) arranged on the second medium 2N circulation loop (102) for enhancing the circulation of the second medium 2N; a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 1B, a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 2B, and the third heat exchanger (3) is provided with a medium channel 3B, and a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 3B.

[0040] The fans or pumps mentioned above enhance the convection heat transfer intensity of the medium in the channel and improve the heat transfer efficiency.

[0041] Preferably, the thermal management device further comprises a fourth circulation loop (104) of the second medium 2N connected in parallel to the second medium 2N external circulation loop (103); the second pump (62), the third valve (73) and the fourth heat exchanger (8) are arranged on the fourth circulation loop (104) so ​​that the fourth heat exchanger (8) respectively forms a cooling and heating heat exchange cycle with the first heat exchanger (1), the second heat exchanger (2) and the third heat exchanger (3); the second pump (62) can change the heat exchange amount of the fourth heat exchanger (8) by adjusting the flow rate.

[0042] The present invention provides a vehicle air conditioning application structure of a thermal management device as shown in Figure 4 As shown, it comprises: a first heat exchanger (1) (a heat exchanger for the air conditioning in the cabin), a second heat exchanger (2) (a heat exchanger for the environment outside the cabin) , a third heat exchanger (3) (a vehicle equipment component constant temperature heat exchanger), wherein the first heat exchanger (1) is a three-medium heat exchanger having three medium channels 1A, 1B, and 1C which are not interconnected, and the three medium channels 1A-1B, 1A-1C, and 1B-1C directly exchange heat without obstruction; the second heat exchanger (2) has two medium channels 2A and 2B which are not interconnected, and the medium channels 2A and 2B directly exchange heat without obstruction; the third heat exchanger (3) includes a motor heat exchange unit (31), a battery heat exchange unit (32), and a vehicle control heat exchange unit (33); the inlet and outlet of the medium channel 1A are connected to the inlet and outlet of the medium channel 2A to form a first circulation loop (101) of the first medium 1N inside the thermal management device; the inlet and outlet of the medium channel 1C are connected to the inlet and outlet of the third heat exchanger (3) to form a second medium 2N internal circulation loop (102) of the thermal management device.

[0043] The first heat exchanger (1) has a specially designed three-medium channel structure and serves as a core component of the thermal management device. The first medium 1N first circulation loop (101) and the second medium 2N internal circulation loop (102) inside the thermal management device are simply and efficiently coupled together through this core component, thereby achieving more stable and efficient heat exchange between the cabin cold and hot air conditioning heat exchanger, the cabin environment heat exchanger, and the vehicle equipment component constant temperature heat exchanger.

[0044] Preferably: the second heat exchanger (2) of the thermal management device is a three-medium heat exchanger including a medium channel 2C, wherein the three medium channels 2A, 2B, and 2C therein are not interconnected, and the channels 2A-2B, 2A-2C, and 2B-2C in the three medium channels are directly heat exchanged without obstruction; the inlet and outlet of the medium channel 2C are correspondingly connected to the inlet and outlet of the medium channel 3A, forming a second medium 2N external circulation loop (103) of the thermal management device; the thermal management device further comprises a first valve (71) arranged on the second medium 2N internal circulation loop (102) and a second valve (72) on the second medium 2N external circulation loop (103), and the two valves are used for switching and regulating the second medium 2N internal circulation loop (102) and the second medium 2N external circulation loop (103).

[0045] Preferably: the thermal management device comprises a throttling assembly (4) and a compressor (5) arranged on the first circulation loop (101) of the first medium 1N; the medium channel 1A, the throttling assembly (4), the medium channel 2A, the compressor (5), and the medium channel 1A are connected in sequence to form a closed circulation structure for the circulation of the gas-liquid phase change medium; the thermal management device also comprises an intake and exhaust reversing valve group (this component is well known to those skilled in the art and is not shown in the figure), the intake port and the exhaust port of the compressor (5) are connected to two interfaces of the intake and exhaust reversing valve group, and the other two interfaces of the intake and exhaust reversing valve group are respectively connected to the medium channel 1A and the medium channel 2A, for switching between cooling and heating cycles.

[0046] The heat pump structure of the first medium 1N first circulation loop (101) of the thermal management device improves the thermal energy quality of the heat exchange medium between the first heat exchanger (1), the second heat exchanger (2) and the third heat exchanger (3), and can more efficiently recycle and utilize low-quality thermal energy to achieve heating and cooling functions.

[0047] Preferably: the thermal management device further comprises a first pump (61) arranged on the second medium 2N circulation loop (102) for enhancing the circulation of the second medium 2N; a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 1B, and a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 2B; the first pump (61) adjusts the flow rate to change the total heat exchange capacity of the motor heat exchange unit (31), the battery heat exchange unit (32), and the vehicle control heat exchange unit (33) in the third heat exchanger (3) (vehicle equipment component constant temperature heat exchanger).

[0048] The fans or pumps mentioned above enhance the convection heat transfer intensity of the medium in the channel and improve the heat transfer efficiency.

[0049] Preferably, the thermal management device further comprises a fourth circulation loop (104) of the second medium 2N connected in parallel to the second medium 2N external circulation loop (103); the second pump (62), the third valve (73), and the fourth heat exchanger (8) (cabin partition or heat recovery heat exchanger) are arranged on the fourth circulation loop (104); the fourth heat exchanger (8) respectively forms a cooling and heating heat exchange cycle with the first heat exchanger (1), the second heat exchanger (2), and the third heat exchanger (3); the second pump (62) can change the heat exchange amount of the fourth heat exchanger (8) by adjusting the flow rate.

[0050] The third heat exchanger (3) further comprises at least one fourth valve (74), the fourth valve (74) being used to change the distribution or switching of the second medium 2N among the motor heat exchange unit (31), the battery heat exchange unit (32) and the vehicle control heat exchange unit (33) in the third heat exchanger (3) (vehicle equipment component constant temperature heat exchanger).

[0051] The thermal management device of the present invention can heat or cool the passenger compartment in the vehicle according to actual needs, while refrigerating the motor, battery, and controller or increasing the temperature and controlling the constant temperature of the battery, thereby ensuring the comfort requirements of the cabin in the vehicle while ensuring the efficient and reliable operation of the main components of the electric vehicle, especially the battery.

[0052] The control method of a thermal management device described in the present invention is applied to any of the aforementioned thermal management devices to perform mode switching of heat exchange and heat energy recovery and utilization control on multiple heat sources and heat loads inside and outside the thermal management device.

[0053] The control method of a thermal management device of the present invention comprises a heating mode a1, a heat recovery mode a2, a cooling mode b1, a defrosting mode b2, a constant temperature dehumidification mode b3, a heat pipe heating mode c1, and a heat pipe cooling mode c2, characterized in that: when the thermal management device is set in the heating mode a1, the intake and exhaust reversing valve group is reversed, and the first medium 1N is in the first circulation loop (101), along the compressor (5), the intake and exhaust reversing valve group, the medium channel 1A, the throttling component (4), and the medium channel 2A , the intake and exhaust reversing valve group, and the compressor (5) circulate in sequence, evaporate and absorb heat in the medium channel 2A, and after being pressurized and heated by the compressor (5), condense and release heat and cool in the medium channel 1A, and then throttle and reduce pressure and temperature through the throttling component (4), re-enter the medium channel 2A to start the next cycle, the heat exchange medium in the medium channel 1B obtains heat, the first valve (71) is opened, the second valve (72) is closed, and the first pump (61) is running, the second medium 2N in the medium channel 1C obtains heat, and enters the medium channel 3A along the inner circulation loop (102) through the first valve (71) and the first pump (61) to release heat; when the thermal management device is set to the heat recovery mode a2, the intake and exhaust reversing valve group is reversed, and the first medium 1N in the first circulation loop (101) is along the compressor (5), the intake and exhaust reversing valve group, the medium channel 1A, the throttling component (4), and the medium channel 2A , the suction and exhaust reversing valve group, and the compressor (5) circulate in sequence, evaporating and absorbing heat in the medium channel 2A, and after being pressurized and heated by the compressor (5), condensing and releasing heat and cooling in the medium channel 1A, and then throttling and reducing pressure and cooling through the throttling component (4), re-entering the medium channel 2A to start the next cycle, the heat exchange medium in the medium channel 1B obtains heat, the first valve (71) is closed, the second valve (72) is opened, and the first pump (61) is running, the first pump (61) drives the second medium 2N to obtain heat from the medium channel 3A, enter the medium channel 2C along the external circulation loop (103) to release heat as a recovered heat source for the first circulation loop (101), and then pass through the second valve (72) and are driven by the first pump (61) again to start the next cycle, and the heat exchange medium in the medium channel 2B also serves as the second heat source for the first circulation loop (101);When the thermal management device is set in the cooling mode b1, the intake and exhaust reversing valve group is reversed, and the first medium 1N circulates in the first circulation loop (101) in the direction of the compressor (5), the intake and exhaust reversing valve group, the medium channel 2A, the throttling component (4), the medium channel 1A, the intake and exhaust reversing valve group, and the compressor (5), condensing in the medium channel 2A to release heat and cool down. After throttling and reducing pressure and temperature through the throttling component (4), the medium enters the medium channel 1A to evaporate and absorb heat, and after being pressurized and heated again through the compressor (5), the next cycle begins. The heat exchange medium in the medium channel 1B releases heat and cools down. The first valve (71) is opened, the second valve (72) is closed, and the first pump (61) is running. The second medium 2N in the medium channel 1C releases heat and cools down. After entering the medium channel 3A along the inner circulation loop (102) through the first valve (71) and the first pump (61), it absorbs heat and then enters the medium channel 1C for circulation again. The heat exchange medium in the medium channel 3B releases heat and cools down. When the thermal management device is set to the defrosting mode b2, the intake and exhaust reversing valve group is reversed. The first medium 1N in the first circulation loop (101) is along the compressor (5), the intake and exhaust reversing valve group, the medium channel 2A, the throttling component (4), and the medium channel 1A. , the suction and exhaust reversing valve group, and the compressor (5) circulate in sequence, condense heat and release temperature in the medium channel 2A to realize the defrosting function, throttle and reduce pressure and temperature through the throttling component (4), enter the medium channel 1A to evaporate and absorb heat, and then enter the next cycle after being pressurized and heated again by the compressor (5). The first valve (71) is opened, the second valve (72) is closed, and the first pump (61) is running. The first pump (61) drives the second medium 2N to obtain heat from the medium channel 3A, enter the medium channel 1C along the internal circulation loop (102) to release heat as a recovered heat source for the first circulation loop (101) of the heat pump defrosting, and then pass through the first valve (71) and are driven by the first pump (61) again to start the next cycle. The heat exchange medium in the medium channel 1B also serves as the second heat source for the first circulation loop (101) of the heat pump defrosting;When the thermal management device is set to the constant temperature dehumidification mode b3, the intake and exhaust reversing valve group is reversed, and the first medium 1N circulates in the first circulation loop (101) in the direction of the compressor (5), the intake and exhaust reversing valve group, the medium channel 2A, the throttling component (4), the medium channel 1A, the intake and exhaust reversing valve group, and the compressor (5) in sequence, condenses in the medium channel 2A to release heat and cool down, and is throttled and depressurized and cooled by the throttling component (4), and enters the medium channel 1A to evaporate and absorb heat. The heat exchange medium in the medium channel 1B is dehumidified and cooled, and the first medium 1N is pressurized and heated again by the compressor (5) to enter the next cycle. The first valve (71) is closed, the second valve (72) is opened, and the first pump (61) is running. The first pump (61) drives the second medium 2N to obtain heat from the medium channel 2C, and enters the medium channel 2C along the external circulation loop (103) through the second valve (72) and the first pump (61). The heat is released through the medium channel 3A and then enters the medium channel 2C to start the next cycle. The heat exchange medium in the medium channel 1B after dehumidification and cooling enters the medium channel 3B to absorb heat, heat up and recover heat, thereby realizing a constant temperature dehumidification function. When the thermal management device is set to the thermal management heating mode c1, the heat pump compressor of the first circulation loop (101) does not operate, the first valve (71) is opened, the second valve (72) is opened, and the first pump (61) operates. The first pump (61) drives the second medium 2N to obtain heat from the parallel medium channels 1C and 2C, and heats up along the inner circulation loop (102) and the outer circulation loop (102). 3) After passing through the first valve (71) and the second valve (72), the heat is respectively released in the medium channel 3A, and then the heat is obtained by dividing the heat into the parallel medium channels 1C and 2C to start the next cycle. The closing or opening of the first valve (71) and the second valve (72) is used to switch the inner circulation loop (102) and the outer circulation loop (103). When the thermal management device is set in the heat pipe cooling mode c2, the heat pump compressor of the first circulation loop (101) does not run, the first valve (71) is opened, the second valve (72) is opened, and the first pump (61) is turned on. During operation, the first pump (61) drives the second medium 2N to obtain heat from the medium channel 3A, and then enters the parallel internal circulation loop (102) and the external circulation loop (103) after being divided, and releases heat in the medium channel 1C and the medium channel 2C, and then converges into the first pump (61) after passing through the first valve (71) and the second valve (72) respectively, and starts the next cycle. The closing or opening of the first valve (71) and the second valve (72) is used to switch the internal circulation loop (102) and the external circulation loop (103), and the flow rate of the first pump (61) is changed to adjust the heat exchange capacity of the second medium 2N. ;

[0054] The present invention also provides a vehicle (preferably an electric vehicle), which includes the thermal management device described in any of the preceding items.

[0055] The vehicle according to the present invention includes a land motor vehicle or an electric vehicle, an aerospace vehicle or a water transport vessel.

Claims

1. A thermal management device, characterized in that: The invention comprises a first heat exchanger (1), a second heat exchanger (2), and a third heat exchanger (3), wherein the first heat exchanger (1) and the second heat exchanger (2) are three-medium heat exchangers, wherein the first heat exchanger (1) has three medium channels 1A, 1B, and 1C which are not connected to each other, and there is no barrier between the channels 1A-1B, 1A-1C, and 1B-1C for direct heat exchange, the second heat exchanger (2) has three medium channels 2A, 2B, and 2C which are not connected to each other, and there is no barrier between the channels 2A-2B, 2A-2C, and 2B-2C for direct heat exchange, and the third heat exchanger (3) has 3A channels 2B, 2C, and 2C channels which are not connected to each other. The medium channel; the inlet and outlet of the channel 1A are connected correspondingly with the outlet and inlet of the channel 2A to form a first circulation loop (101) of the first medium 1N; the inlet and outlet of the channel 1C are connected correspondingly with the outlet and inlet of the channel 3A to form an inner circulation loop (102) of the second medium 2N; the inlet and outlet of the channel 2C are connected correspondingly with the outlet and inlet of the channel 3A to form an outer circulation loop (103) of the second medium 2N; the thermal management device further comprises a first valve (71) arranged on the inner circulation loop (102) and a second valve (72) arranged on the outer circulation loop (103) to be used for switching, regulating and controlling the inner circulation loop (102) and the outer circulation loop (103).

2. The thermal management device according to claim 1, characterized in that: The invention comprises a throttling assembly (4) and a compressor (5) arranged on the first circulation loop (101) of the first medium 1N; the medium channel 1A, the throttling assembly (4), the medium channel 2A, the compressor (5), and the medium channel 1A are connected in sequence to form a closed circulation structure for the circulation of the gas-liquid phase change medium; the thermal management device also comprises an intake and exhaust reversing valve group, the intake port and the exhaust port of the compressor (5) are connected to two interfaces of the intake and exhaust reversing valve group, and the other two interfaces of the intake and exhaust reversing valve group are respectively connected to the medium channel 1A and the medium channel 2A, for switching between cooling and heating cycles.

3. The thermal management device according to claim 1, characterized in that: The heat exchanger (3) further comprises a first pump (61) arranged on the second medium 2N circulation loop (102) for enhancing the circulation of the second medium 2N; a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 1B; a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 2B; and the third heat exchanger (3) is provided with a medium channel 3B; a fan or a pump for enhancing the circulation of the medium is arranged on the medium channel 3B.

4. The thermal management device according to claim 1, characterized in that: It also includes a third pump (63) disposed on the first circulation loop (101) of the first medium 1N, for enhancing the circulation of the first medium 1N.

5. A control method for a thermal management device, characterized in that: Applied to the thermal management device according to any one of claims 1 to 4, the method can be used to switch the heat exchange modes and control the heat recovery and utilization of multiple heat sources and heat loads inside and outside the thermal management device.

6. A vehicle, characterized in that: The thermal management device comprises the thermal management device according to any one of claims 1 to 4.

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