CN216659503U - Vehicle thermal management system - Google Patents

Vehicle thermal management system Download PDF

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Publication number
CN216659503U
CN216659503U CN202122694177.4U CN202122694177U CN216659503U CN 216659503 U CN216659503 U CN 216659503U CN 202122694177 U CN202122694177 U CN 202122694177U CN 216659503 U CN216659503 U CN 216659503U
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China
Prior art keywords
branch
way valve
loop
valve
mode
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CN202122694177.4U
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Chinese (zh)
Inventor
万星荣
刘俊文
余天凯
林务田
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GAC Aion New Energy Automobile Co Ltd
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GAC Aion New Energy Automobile Co Ltd
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Priority to CN202122694177.4U priority Critical patent/CN216659503U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The utility model discloses a vehicle thermal management system, which comprises a heat pump air conditioning system, a battery temperature control system, an electric drive cooling system and a seven-way valve, wherein the seven-way valve is connected with the heat pump air conditioning system; the battery temperature control system comprises a power battery branch and a heating evaporation branch; the heat pump air conditioning system is connected with the heating evaporation branch; the power battery branch, the heating evaporation branch and the electric drive cooling system are connected through a seven-way valve, the working state of the valve of the seven-way valve is switched, and the target working mode is determined. According to the utility model, different working modes can be switched by switching the working states of the valves of the seven-way valve, so that the redundant heat can be flexibly transferred among the heat pump air conditioning system, the battery temperature control system and the electric drive cooling system, and thus, the redundant heat is effectively used, the energy is saved, the energy loss is reduced, and the energy loss can be effectively reduced.

Description

Vehicle thermal management system
Technical Field
The utility model relates to the technical field of vehicle thermal management, in particular to a vehicle thermal management system.
Background
Three separate systems are included in a typical vehicle thermal management system: the system comprises an electric drive cooling system, a power battery temperature control system and an air conditioning system. In a low-temperature environment, an evaporator of a heat pump air conditioning system and a power battery system need to absorb heat, an electric drive system and a power battery generate heat in the working process, and in order to ensure normal work of parts, waste heat is usually discharged into the environment through a heat exchanger and cannot be effectively utilized; and the vehicle thermal management system in the prior art has a complex structure and higher cost.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a vehicle thermal management system, which aims to solve the problem that waste heat cannot be effectively utilized.
A vehicle thermal management system comprises a heat pump air conditioning system, a battery temperature control system, an electric drive cooling system and a seven-way valve; the battery temperature control system comprises a power battery branch and a heating evaporation branch; the heat pump air conditioning system is connected with the heating evaporation branch; the power battery branch, the heating evaporation branch and the electric drive cooling system are connected through the seven-way valve, the working state of the valves of the seven-way valve is switched, and a target working mode is determined;
the target working mode comprises a first working mode, a second working mode or a third working mode;
the first working mode is that the electrically-driven cooling system and the heating evaporation branch are communicated through the seven-way valve to form a loop, and the power battery branch forms a loop through the seven-way valve;
the second working mode is that the electric drive cooling system and the power battery branch are communicated through the seven-way valve to form a loop, and the heating evaporation branch forms a loop through the seven-way valve;
the third working mode is a working mode that the heating evaporation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the electric drive cooling system forms the loop through the seven-way valve.
Preferably, the electrically driven cooling system comprises an isolated heat dissipation branch and a communicating heat dissipation branch;
the first working mode comprises a first isolation mode and a first communication mode; the first isolation mode is a working mode in which the isolation heat dissipation branch and the heating evaporation branch are communicated through the seven-way valve to form a loop, and the power battery branch forms a loop through the seven-way valve; the first communication mode is a working mode that the communication heat dissipation branch and the heating evaporation branch are communicated through the seven-way valve to form a loop, and the power battery branch forms the loop through the seven-way valve;
the second working mode comprises a second isolation mode and a second communication mode; the second isolation mode is a working mode in which the isolation heat dissipation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the heating evaporation branch forms a loop through the seven-way valve; the second communication mode is a working mode that the communication heat dissipation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the heating evaporation branch forms the loop through the seven-way valve;
the third operating mode comprises a third isolated mode and a third connected mode; the third isolation mode is a working mode in which the heating evaporation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the isolation heat dissipation branch forms a loop through the seven-way valve; the third communication mode is a working mode that the heating evaporation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the communication heat dissipation branch forms the loop through the seven-way valve.
Preferably, the isolation heat dissipation branch comprises a driving electric water pump and a motor assembly which are connected with each other;
the communicated heat dissipation branch comprises a driving electric water pump, a motor assembly and a radiator which are mutually connected; one end of the radiator is connected with the motor, and the other end of the radiator is connected with the seven-way valve.
Preferably, the heating evaporation branch comprises a heating evaporator, a PTC heater and an evaporation electric water pump which are connected with each other.
Preferably, the heat pump air conditioning system comprises a compressor, a condenser, a heating evaporator, a liquid storage tank and a valve assembly; the valve assembly comprises a second stop valve and a third electronic expansion valve;
one end of the compressor is connected with the condenser, and the other end of the compressor is connected with the liquid storage tank;
one end of the second stop valve is connected with the condenser, and the other end of the second stop valve is connected with the third electronic expansion valve;
one end of the heating evaporator is connected with the third electronic expansion valve, and the other end of the heating evaporator is connected with the liquid storage tank.
Preferably, the heat pump air conditioning system further comprises an external heat exchanger; the valve assembly further comprises a first electronic expansion valve and a first stop valve;
one end of the first electronic expansion valve is connected with the condenser, and the other end of the first electronic expansion valve is connected with the external heat exchanger;
one end of the first stop valve is connected with the external heat exchanger, and the other end of the first stop valve is connected with the liquid storage tank.
Preferably, the heat pump air conditioning system further includes a cooling fan disposed opposite to the radiator and the external heat exchanger.
Preferably, the heat pump air conditioning system further comprises a cooling evaporator; the valve assembly comprises a one-way valve and a second electronic expansion valve;
the inlet end of the one-way valve is connected with the external heat exchanger, and the outlet end of the one-way valve is connected with the second electronic expansion valve and the third electronic expansion valve;
the cooling evaporator is connected with the second electronic expansion valve, and the other end of the cooling evaporator is connected with the liquid storage tank.
Preferably, the heat pump air conditioning system further comprises a blower, the blower is arranged opposite to the condenser and the cooling evaporator and is positioned at an air inlet of the passenger compartment.
The embodiment of the utility model provides a vehicle thermal management system, which can realize the switching of different working modes by switching the working states of valves of a seven-way valve, so that redundant heat can be flexibly transferred among a heat pump air-conditioning system, a battery temperature control system and an electrically-driven cooling system, the redundant heat is effectively used, energy is saved, energy loss is reduced, and the heat pump air-conditioning system can normally work when the battery temperature control system and the electrically-driven cooling system do not generate the redundant heat, so that hot air or cold air is provided for a passenger cabin by utilizing the heat pump air-conditioning system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic illustration of a target mode of operation of a vehicle thermal management system in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a vehicle thermal management system according to an embodiment of the present invention.
Description of the drawings:
101. a first isolation mode; 102. a first connected mode; 103. a second isolation mode; 104. a second communication mode; 105. a third isolation mode; 106. a third communication mode;
1. a compressor; 2. a condenser; 3. a first electronic expansion valve; 4. an external heat exchanger; 5. a first shut-off valve; 6. a one-way valve; 7. a second stop valve; 8. a second electronic expansion valve; 9. cooling the evaporator; 10. A third electronic expansion valve; 11. heating the evaporator; 12. a liquid storage tank; 13. a seven-way valve; 14. a power battery; 15. an evaporation electric water pump; 16. a PTC heater; 17. driving the electric water pump; 18. a charger; 19. a motor; 20. a heat sink; 21. a blower; 22. and a cooling fan.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a vehicle thermal management system, as shown in fig. 1, the vehicle thermal management system comprises a heat pump air conditioning system, a battery temperature control system, an electric drive cooling system and a seven-way valve 13; the battery temperature control system comprises a power battery branch and a heating evaporation branch; the heat pump air conditioning system is connected with the heating evaporation branch; the power battery branch, the heating evaporation branch and the electric drive cooling system are connected through a seven-way valve 13, the working state of the valve of the seven-way valve 13 is switched, and a target working mode is determined; the target working mode comprises a first working mode, a second working mode or a third working mode; the first working mode is a working mode that the electric driving cooling system and the heating evaporation branch are communicated through the seven-way valve 13 to form a loop, and the power battery branch forms the loop through the seven-way valve 13; the second working mode is a working mode that the electric drive cooling system and the power battery branch are communicated through the seven-way valve 13 to form a loop, and the heating evaporation branch forms a loop through the seven-way valve 13; the third working mode is a working mode that the heating evaporation branch and the power battery branch are communicated through the seven-way valve 13 to form a loop, and the electric drive cooling system forms the loop through the seven-way valve 13.
The target working mode refers to a working mode of the vehicle thermal management system. The first working mode, the second working mode and the third working mode are modes that any two systems of the power battery branch, the heating evaporation branch and the electric drive cooling system are connected by switching the seven-way valve 13, and the other system forms an independent loop, so that the vehicle thermal management system utilizes waste heat generated by the motor assembly or the power battery 14 to optimize the energy management of the whole vehicle.
The vehicle thermal management system of this embodiment can realize different mode switches through the valve operating condition who switches seven logical valve 13, so that unnecessary heat carries out nimble transfer between heat pump air conditioning system, battery temperature control system and the electric drive cooling system, thereby effectively use unnecessary heat, energy saving, reduce energy loss, and when battery temperature control system and electric drive cooling system do not produce unnecessary heat, heat pump air conditioning system can normally work, utilize heat pump air conditioning system to provide hot-blast or cold wind for passenger cabin, compare the tradition and need solitary heating device or cooling device, can effectively reduce energy loss.
Specifically, first mode, electrically driven cooling system and heating evaporation branch road form the return circuit through seven logical valve 13 intercommunications, the unnecessary heat that produces in the electrically driven cooling system can be utilized by heat pump air conditioning system, and utilize heating evaporation branch road cooling electrically driven cooling system, thereby effectively use unnecessary heat, the energy saving, reduce the energy loss, it is better to guarantee heat pump air conditioning system energy-conserving effect, the purpose of the performance of heat pump air conditioning system is improved, and utilize heat pump air conditioning system can heat passenger cabin, compare traditional heater energy consumption and reduce by a wide margin.
In the second working mode, the electric drive cooling system and the power battery branch are communicated through the seven-way valve 13 to form a loop, redundant heat generated in the electric drive cooling system is used for heating the power battery 14, or redundant heat generated in the power battery 14 is used for heating the motor assembly, and the heat pump air-conditioning system still utilizes the heating evaporation branch to provide heat when the power battery 14 and the electric drive cooling system cannot provide heat, so that the normal work of the heat pump air-conditioning system is ensured.
In the third working mode, the heating evaporation branch and the power battery branch are communicated through the seven-way valve 13 to form a loop, the heating evaporation branch can be used for carrying out temperature adjustment on the power battery branch so as to heat or cool the power battery 14, the normal work of a vehicle thermal management system is ensured, and meanwhile, the heat pump air conditioning system can be used for heating or cooling according to actual requirements.
In one embodiment, as shown in FIGS. 1 and 2, an electrically driven cooling system includes an isolated heat sink branch and a connected heat sink branch; the first operation mode includes a first isolation mode 101 and a first communication mode 102; the first isolation mode 101 is a working mode in which the isolation heat dissipation branch and the heating evaporation branch are communicated through the seven-way valve 13 to form a loop, and the power battery branch forms a loop through the seven-way valve 13; the first communication mode 102 is a working mode in which the heat dissipation branch and the heating evaporation branch are communicated through the seven-way valve 13 to form a loop, and the power battery branch forms the loop through the seven-way valve 13; the second operation mode includes a second isolation mode 103 and a second connected mode 104; the second isolation mode 103 is a working mode in which the isolation heat dissipation branch is communicated with the power battery branch through the seven-way valve 13 to form a loop, and the heating evaporation branch forms a loop through the seven-way valve 13; the second communication mode 104 is a working mode in which the heat dissipation branch and the power battery branch are communicated through the seven-way valve 13 to form a loop, and the heating evaporation branch forms a loop through the seven-way valve 13; the third operating mode includes a third isolated mode 105 and a third connected mode 106; the third isolation mode 105 is a working mode in which the heating evaporation branch is communicated with the power battery branch through the seven-way valve 13 to form a loop, and the isolation heat dissipation branch forms a loop through the seven-way valve 13; the third communication mode 106 is a working mode in which the heating evaporation branch is communicated with the power battery branch through the seven-way valve 13 to form a loop, and the communication heat dissipation branch forms a loop through the seven-way valve 13.
In this embodiment, the electric drive cooling system includes the isolation heat dissipation branch road and communicates the heat dissipation branch road to the work of isolation heat dissipation branch road or the work of intercommunication heat dissipation branch road is controlled according to how much heat produced in electric drive cooling system and the battery temperature control system, realizes controlling vehicle thermal management system and works under different branch roads, reaches the use of accurate control surplus heat, reduces the vehicle energy consumption, promotes the mileage of driving. Specifically, when the electric drive cooling system needs to dissipate heat, the communicated heat dissipation branch is selected to work, so that the normal work of the vehicle heat management system is ensured, the use of redundant heat is accurately controlled, and the energy consumption of the vehicle is reduced; when the electric drive cooling system does not need to dissipate heat, the isolation heat dissipation branch is selected to work, so that the normal work of the vehicle heat management system is ensured, the use of redundant heat is accurately controlled, and the energy consumption of the vehicle is reduced.
In one embodiment, as shown in fig. 1 and 2, the isolated heat dissipation branch comprises a driving electric water pump 17 and a motor assembly which are connected with each other; the communicated heat dissipation branch comprises a driving electric water pump 17, a motor assembly and a radiator 20 which are mutually connected; the radiator 20 has one end connected to the motor 19 and the other end connected to the seven-way valve 13.
In this embodiment, the motor assembly includes a motor 19 and a charger 18.
Specifically, the motor assembly and the driving electric water pump 17 which are connected with each other form an isolated heat dissipation branch which is suitable for the situation that the electric driving cooling system does not need the radiator 20 for heat dissipation, namely the situation that the heat generated by the electric driving cooling system is less; the mutually connected motor assembly, the radiator 20 and the driving electric water pump 17 form a communicated radiating branch, and the radiator is suitable for an electric drive cooling system which needs the radiator 20 to radiate heat, namely the situation that the electric drive cooling system generates more heat is adopted, the normal work of a vehicle heat management system is ensured, the use of redundant heat is accurately controlled, and the energy consumption of the vehicle is reduced.
In one embodiment, as shown in fig. 1 and 2, the heating evaporation branch includes a heating evaporator 11, a PTC heater 16 and an evaporation electric water pump 15 connected to each other.
In the embodiment, the heating evaporator 11 is used for absorbing the redundant heat generated by the electrically-driven cooling system and/or the power battery branch, so that the redundant heat is effectively utilized, and the energy consumption is reduced; and the PTC heater 16 is used for providing heat to heat the electrically-driven cooling system and/or the power battery branch, so that devices in the vehicle thermal management system can be protected, and the devices are prevented from being frozen and frosted.
Further, when in a very low temperature environment (e.g., -20 ℃ temperature environment), the heat pump air conditioning performance is degraded and cannot meet the heating requirements of the passenger compartment and the power battery 1414. The vehicle thermal management system provided by the embodiment can use the heating evaporation branch to heat the battery 14, and use the heating evaporation branch to provide heat for the heat pump air conditioning system so as to heat the passenger compartment, so that the vehicle can still work in a limit low-temperature environment, and the performance of the vehicle management system is improved.
In one embodiment, as shown in fig. 1 and 2, a heat pump air conditioning system includes a compressor 1, a condenser 2, a heater-evaporator 11, a receiver tank 12, and a valve assembly; the valve assembly comprises a second stop valve 7 and a third electronic expansion valve 10; one end of the compressor 1 is connected with the condenser 2, and the other end is connected with the liquid storage tank 12; one end of the second stop valve 7 is connected with the condenser 2, and the other end is connected with the third electronic expansion valve 10; one end of the heating evaporator 11 is connected with the third electronic expansion valve 10, and the other end is connected with the liquid storage tank 12.
In this embodiment, at this time, the flowing direction of the refrigerant in the heat pump air conditioning system is specifically: the low-temperature and low-pressure refrigerant in the liquid storage tank 12 flows to the compressor 1; the gas is compressed by the compressor 1 and then is changed into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas flows to the condenser 2; condensing the heat released in the condenser 2 into a liquid of medium temperature and high pressure, absorbing the released heat by the air around the liquid to form hot air, and blowing the hot air into the passenger compartment to heat the passenger compartment; the medium-temperature high-pressure liquid passes through a second stop valve 7 and a third electronic expansion valve 10, and is expanded and decompressed through the third electronic expansion valve 10 to form medium-temperature low-pressure liquid which flows to a heating evaporator 11; the medium-temperature low-pressure liquid absorbs the surplus heat by the heating evaporator 11 to form a low-temperature low-pressure refrigerant which flows to the liquid storage tank 12; at this time, the heating evaporator 11 is used for absorbing the excess heat generated in the electrically driven cooling system or the power battery branch circuit, so as to ensure that the heat pump air conditioning system is heated, accurately control the use of the excess heat, and reduce the energy consumption of the vehicle.
It is understood that the heat pump air conditioning system is usually operated in a low temperature environment, and the heating evaporator 11 may frost; the heat pump air-conditioning system of the embodiment heats the passenger compartment by utilizing the redundant heat generated by the electric drive cooling system or the power battery branch, and provides cold air for the passenger compartment by utilizing the condenser 2, so that the energy utilization efficiency of the whole vehicle is improved, and the energy utilization of the whole vehicle is optimized; and the heating evaporator 11 absorbs the surplus heat generated by the electrically driven cooling system or the power battery branch, so as to ensure that the heating evaporator 11 does not frost in a low-temperature environment, thereby protecting the heating evaporator 11 by using the surplus heat.
In this embodiment, the current working state of the heat pump air conditioning system is a heating state, so that the heat pump air conditioning system is used to provide hot air for the passenger compartment, and the heat pump air conditioning system is applicable to any one of the first isolation mode 101, the second isolation mode 103, the third isolation mode 105, the first communication mode 102 and the third communication mode 106, so as to ensure that the heat pump air conditioning system works normally, accurately control the use of excess heat, and reduce the energy consumption of a vehicle.
In an embodiment, as shown in fig. 1 and 2, the heat pump air conditioning system further comprises an external heat exchanger 4; the valve assembly further comprises a first electronic expansion valve 3 and a first stop valve 5; one end of the first electronic expansion valve 3 is connected with the condenser 2, and the other end is connected with the external heat exchanger 4; one end of the first stop valve 5 is connected with the external heat exchanger 4, and the other end is connected with the liquid storage tank 12.
In this embodiment, the flowing direction of the refrigerant in the heat pump air conditioning system is specifically as follows: the low-temperature and low-pressure refrigerant in the liquid storage tank 12 flows to the compressor 1; the gas is compressed by the compressor 1 and then is changed into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas flows to the condenser 2; condensing the heat released in the condenser 2 into a liquid of medium temperature and high pressure, absorbing the released heat by the air around the liquid to form hot air, and blowing the hot air into the passenger compartment to heat the passenger compartment; the medium-temperature high-pressure liquid passes through the first electronic expansion valve 3 with a preset opening degree, and is expanded and decompressed through the first electronic expansion valve 3 with the preset opening degree to form medium-temperature low-pressure liquid, and the medium-temperature low-pressure liquid flows into the external heat exchanger 4; the medium-temperature low-pressure liquid exchanges heat through the external heat exchanger 4 to form a low-temperature low-pressure refrigerant, and the refrigerant flows to the liquid storage tank 12.
The embodiment uses the external heat exchanger 4 as an evaporator to exchange heat with the outside, so that the heat pump air conditioning system can be ensured to heat, and the condenser 2 is utilized to provide hot air for the passenger cabin. The preset opening degree is a preset opening degree, and when the refrigerant passes through the first electronic expansion valve 3 with the preset opening degree, the refrigerant is expanded and decompressed by the first electronic expansion valve 3 with the preset opening degree. On the other hand, when the refrigerant passes through the fully opened first electronic expansion valve 3, the fully opened first electronic expansion valve 3 does not process the refrigerant.
In this embodiment, the current operating state of the heat pump air conditioning system is a heating state, so as to provide hot air for the passenger compartment by using the heat pump air conditioning system, and the heat pump air conditioning system is suitable for any one of the second isolation mode 103, the third isolation mode 105, the second communication mode 104, and the third communication mode 106, so as to accurately control the use of the excess heat, and reduce the energy consumption of the vehicle.
In one embodiment, as shown in fig. 1 and 2, the heat pump air conditioning system further includes a cooling fan 22, the cooling fan 22 being disposed opposite the radiator 20 and the exterior heat exchanger 4.
In this embodiment, the cooling fan 22 is utilized to accelerate the heat dissipation effect of the heat sink 20 and ensure that the heat exchange effect between the external heat exchanger 4 and the external environment is better, and the cooling fan 22 is arranged opposite to the heat sink 20 and the external heat exchanger 4, so that the use efficiency of the cooling fan 22 can be improved, and the cost can be reduced.
In an embodiment, the heat pump air conditioning system further comprises a cooling evaporator 9; the valve assembly comprises a one-way valve 6 and a second electronic expansion valve 8; the inlet end of the one-way valve 6 is connected with the external heat exchanger 4, and the outlet end is connected with the second electronic expansion valve 8 and the third electronic expansion valve 10; the cooling evaporator 9 is connected with the second electronic expansion valve 8, and the other end is connected with the liquid storage tank 12.
In this embodiment, since the outlet end of the check valve 6 is connected to the second electronic expansion valve 8 and the third electronic expansion valve 10, the refrigerant in the heat pump air conditioning system may flow to the second electronic expansion valve 8 through the check valve 6, or flow to the third electronic expansion valve 10 through the check valve 6; or flows to the second electronic expansion valve 8 and the third electronic expansion valve 10 through the check valve 6; therefore, the flowing direction of the refrigerant can be divided into three paths, so that the current working state of the heat pump air-conditioning system can be controlled according to the actual requirement, for example, the current working state of the heat pump air-conditioning system can be controlled to be a non-working state and a cooling state, and the heat pump air-conditioning system can be flexibly controlled.
As an example, the flow direction of the refrigerant in the heat pump air conditioning system is specifically: the low-temperature and low-pressure refrigerant in the liquid storage tank 12 flows to the compressor 1; the gas is compressed by the compressor 1 and then is changed into high-temperature high-pressure gas, and the high-temperature high-pressure gas flows to the fully-opened first electronic expansion valve 3; the high-temperature and high-pressure gas passes through the fully-opened first electronic expansion valve 3 and flows to the external heat exchanger 4; the high-temperature and high-pressure gas exchanges heat through the external heat exchanger 4 to form medium-temperature and high-pressure liquid; the medium-temperature high-pressure liquid enters a third electronic expansion valve 10 through a one-way valve 6 to be expanded and decompressed to form medium-temperature low-pressure liquid; the medium-temperature low-pressure liquid flows to the heating evaporator 11 to form low-temperature low-pressure liquid, and flows to the liquid storage tank 12 through the heating evaporator 11, at the moment, the heat pump air-conditioning system does not work, the current working state of the heat pump air-conditioning system is controlled according to actual conditions, and the user requirements are met.
In this embodiment, the current working state of the heat pump air conditioning system is not working, and is suitable for one of the third isolation mode 105 and the third communication mode 106, so as to accurately control the use of the excess heat and reduce the energy consumption of the vehicle.
As another example, the flow direction of the refrigerant in the heat pump air conditioning system is specifically as follows: the flow direction of the refrigerant in the heat pump air-conditioning system is as follows: the low-temperature and low-pressure refrigerant in the liquid storage tank 12 flows to the compressor 1; the gas is compressed by the compressor 1 and then becomes high-temperature high-pressure gas, and the high-temperature high-pressure gas flows to the fully-opened first electronic expansion valve 3; the high-temperature and high-pressure gas passes through the fully-opened first electronic expansion valve 3 and flows to the external heat exchanger 4; the high-temperature and high-pressure gas exchanges heat through the external heat exchanger 4 to form medium-temperature and high-pressure liquid; the medium-temperature high-pressure liquid is divided into two paths, one path of the medium-temperature high-pressure liquid enters a third electronic expansion valve 10 through a one-way valve 6 to be expanded and decompressed to form medium-temperature low-pressure liquid, the medium-temperature low-pressure liquid flows to a heating evaporator 11 to form low-temperature low-pressure liquid, and the low-temperature low-pressure liquid flows to a liquid storage tank 12 through the heating evaporator 11; and the other path of the refrigerant is expanded and decompressed through a second electronic expansion valve 8 to form medium-temperature low-pressure liquid, the medium-temperature low-pressure liquid flows to a cooling evaporator 9 to form low-temperature low-pressure liquid, and the low-temperature low-pressure liquid flows to a liquid storage tank 12 through the cooling evaporator 9, at the moment, the current working state of the heat pump air conditioning system is a cooling system, and cold air is provided for the passenger compartment by utilizing the cooling evaporator 9.
In this embodiment, the current working state of the heat pump air conditioning system is a cooling state, and is suitable for one of the third isolation mode 105 and the third communication mode 106, so as to accurately control the use of the excess heat and reduce the energy consumption of the vehicle.
As another example, the flow direction of the refrigerant in the heat pump air conditioning system is specifically as follows: the low-temperature and low-pressure refrigerant in the liquid storage tank 12 flows to the compressor 1; the gas is compressed by the compressor 1 and then is changed into high-temperature high-pressure gas, and the high-temperature high-pressure gas flows to the fully-opened first electronic expansion valve 3; the high-temperature and high-pressure gas passes through the fully-opened first electronic expansion valve 3 and flows to the external heat exchanger 4; the high-temperature and high-pressure gas exchanges heat through the external heat exchanger 4 to form medium-temperature and high-pressure liquid; the medium-temperature high-pressure liquid is expanded and decompressed through the second electronic expansion valve 8 to form medium-temperature low-pressure liquid, the medium-temperature low-pressure liquid flows to the cooling evaporator 9 to form low-temperature low-pressure liquid, the low-temperature low-pressure liquid flows to the liquid storage tank 12 through the cooling evaporator 9, and at the moment, the current working state of the heat pump air conditioning system is a cooling state, and the cooling evaporator 9 is utilized to provide cold air for the passenger compartment.
In this embodiment, the current operating state of the heat pump air conditioning system is a cooling state, and is suitable for the second communication mode 104, so as to accurately control the use of the excess heat and reduce the energy consumption of the vehicle.
In this embodiment, when the first electronic expansion valve 3 is fully opened, the first electronic expansion valve 3 does not process the refrigerant, and at this time, the external heat exchanger 4 serves as the condenser 2 to exchange heat with the external environment, so as to ensure normal operation of the heat pump air conditioning system. It is understood that the external heat exchanger 4 can be used as the condenser 2 or the evaporator according to the actual situation, and therefore, the external heat exchanger 4 has reusability, thereby reducing the number of components of the system and reducing the cost.
In one embodiment, the heat pump air conditioning system further comprises a blower 21, the blower 21 being disposed opposite the condenser 2 and the cooling evaporator 9 and being located at an air inlet of the passenger compartment.
In this embodiment, the blower 21 is used to blow hot air into the passenger compartment to ensure better effect of providing hot air for the passenger compartment.
The vehicle thermal management system provided by the utility model can reduce the number of devices of the vehicle thermal management system by using the seven-way valve 13, can realize flexible transfer of heat among the heat pump air conditioning system, the battery temperature control system and the electric drive cooling system without matching other valves, can effectively reduce the cost of the vehicle thermal management system, and simultaneously has a simple and convenient structure and is convenient to control; the current working state of the heat pump air-conditioning system can be flexibly controlled according to actual conditions, the vehicle performance is improved, and the external heat exchanger 4 in the heat pump air-conditioning system can be used as the condenser 2 or the evaporator according to actual needs, so that the number of devices of the system is reduced, and the cost is reduced.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (9)

1. A vehicle thermal management system is characterized by comprising a heat pump air conditioning system, a battery temperature control system, an electric drive cooling system and a seven-way valve; the battery temperature control system comprises a power battery branch and a heating evaporation branch; the heat pump air conditioning system is connected with the heating evaporation branch; the power battery branch, the heating evaporation branch and the electric drive cooling system are connected through the seven-way valve, the working state of the valves of the seven-way valve is switched, and a target working mode is determined;
the target working mode comprises a first working mode, a second working mode or a third working mode;
the first working mode is that the electrically-driven cooling system and the heating evaporation branch are communicated through the seven-way valve to form a loop, and the power battery branch forms a loop through the seven-way valve;
the second working mode is that the electric drive cooling system and the power battery branch are communicated through the seven-way valve to form a loop, and the heating evaporation branch forms a loop through the seven-way valve;
the third working mode is a working mode that the heating evaporation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the electric drive cooling system forms the loop through the seven-way valve.
2. The vehicle thermal management system of claim 1, wherein the electrically driven cooling system comprises an isolated heat sink branch and a connected heat sink branch;
the first working mode comprises a first isolation mode and a first communication mode; the first isolation mode is a working mode that the isolation heat dissipation branch and the heating evaporation branch are communicated through the seven-way valve to form a loop, and the power battery branch forms a loop through the seven-way valve; the first communication mode is a working mode that the communication heat dissipation branch and the heating evaporation branch are communicated through the seven-way valve to form a loop, and the power battery branch forms the loop through the seven-way valve;
the second working mode comprises a second isolation mode and a second communication mode; the second isolation mode is a working mode in which the isolation heat dissipation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the heating evaporation branch forms a loop through the seven-way valve; the second communication mode is a working mode that the communication heat dissipation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the heating evaporation branch forms the loop through the seven-way valve;
the third operating mode comprises a third isolated mode and a third connected mode; the third isolation mode is a working mode in which the heating evaporation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the isolation heat dissipation branch forms a loop through the seven-way valve; the third communication mode is a working mode that the heating evaporation branch and the power battery branch are communicated through the seven-way valve to form a loop, and the communication heat dissipation branch forms the loop through the seven-way valve.
3. The vehicle thermal management system of claim 2, wherein the isolated heat sink branch comprises a drive electric water pump and a motor assembly coupled to each other;
the communicated heat dissipation branch comprises a driving electric water pump, a motor assembly and a radiator which are mutually connected; one end of the radiator is connected with the motor, and the other end of the radiator is connected with the seven-way valve.
4. The vehicle thermal management system of claim 3, wherein the heating-evaporation branch comprises a heating evaporator, a PTC heater, and an evaporative electric water pump connected to each other.
5. The vehicle thermal management system of claim 4, wherein the heat pump air conditioning system comprises a compressor, a condenser, a heater evaporator, a reservoir, and a valve assembly; the valve assembly comprises a second stop valve and a third electronic expansion valve;
one end of the compressor is connected with the condenser, and the other end of the compressor is connected with the liquid storage tank;
one end of the second stop valve is connected with the condenser, and the other end of the second stop valve is connected with the third electronic expansion valve;
one end of the heating evaporator is connected with the third electronic expansion valve, and the other end of the heating evaporator is connected with the liquid storage tank.
6. The vehicle thermal management system of claim 5, wherein the heat pump air conditioning system further comprises an external heat exchanger; the valve assembly further comprises a first electronic expansion valve and a first stop valve;
one end of the first electronic expansion valve is connected with the condenser, and the other end of the first electronic expansion valve is connected with the external heat exchanger;
one end of the first stop valve is connected with the external heat exchanger, and the other end of the first stop valve is connected with the liquid storage tank.
7. The vehicle thermal management system of claim 6, wherein the heat pump air conditioning system further comprises a cooling fan disposed opposite the radiator and the external heat exchanger.
8. The vehicle thermal management system of claim 6, wherein the heat pump air conditioning system further comprises a cooling evaporator; the valve assembly comprises a one-way valve and a second electronic expansion valve;
the inlet end of the one-way valve is connected with the external heat exchanger, and the outlet end of the one-way valve is connected with the second electronic expansion valve and the third electronic expansion valve;
the cooling evaporator is connected with the second electronic expansion valve, and the other end of the cooling evaporator is connected with the liquid storage tank.
9. The vehicle thermal management system of claim 8, wherein the heat pump air conditioning system further comprises a blower disposed opposite the condenser and the cooling evaporator and positioned at an air intake of the passenger compartment.
CN202122694177.4U 2021-11-04 2021-11-04 Vehicle thermal management system Active CN216659503U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122694177.4U CN216659503U (en) 2021-11-04 2021-11-04 Vehicle thermal management system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122694177.4U CN216659503U (en) 2021-11-04 2021-11-04 Vehicle thermal management system

Publications (1)

Publication Number Publication Date
CN216659503U true CN216659503U (en) 2022-06-03

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CN202122694177.4U Active CN216659503U (en) 2021-11-04 2021-11-04 Vehicle thermal management system

Country Status (1)

Country Link
CN (1) CN216659503U (en)

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