A heat pump air conditioner thermal management system, control method, control device and medium

Abstract

The application provides a heat pump air conditioner heat management system, a control method, a control device and a medium, wherein the heat pump air conditioner heat management system comprises a first main circuit and a second main circuit, has a structure of double condensers and double evaporators, the flow direction and flow of refrigerant are changed through switching control of each valve, on the basis of a structure space similar to a traditional air conditioner, a refrigeration working mode can be realized, and heating working modes of a single condenser and a single evaporator, a double condenser and a single evaporator, and a double condenser and a double evaporator can be realized; the first main circuit and the second main circuit operate simultaneously during heating, and the waste heat of a power supply device, an electric drive device and a power battery is utilized for heating, so that frost formation of an outdoor evaporator is reduced; during refrigeration, the first main circuit is directly used to refrigerate a passenger cabin, high-efficiency heating and high-efficiency refrigeration can be considered, the most suitable energy-saving and high-efficiency working mode is used to meet the temperature control requirements of the passenger cabin, the power supply device, the electric drive device and the power battery, and the energy consumption of the vehicle is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle thermal management, and in particular to a heat pump air conditioner thermal management system, a control method, a control device and a medium. BACKGROUND

[0002] Since the energy of a pure electric vehicle comes from a power battery, the whole vehicle is extremely sensitive to energy consumption, and any energy consumption of the pure electric vehicle will affect the endurance of the pure electric vehicle. The thermal management system of the pure electric vehicle not only needs to perform passenger compartment thermal management, but also needs to perform thermal management on devices such as power batteries, electric drives, and power supplies, and needs to simultaneously consider heating, cooling, and other needs, making the design of the thermal management system more difficult.

[0003] In the thermal management system of a pure electric vehicle, a heat pump air conditioner is generally used to replace a thermal sensitive (PTC) heater to reduce power consumption. The heat pump air conditioner is generally an indirect heat pump air conditioner or a direct heat pump air conditioner. The indirect heat pump air conditioner needs to perform secondary heat exchange through a liquid cooling condenser, which limits the heating performance. Regardless of the indirect heat pump air conditioner or the direct heat pump air conditioner, the dual-purpose structure design of the outdoor heat exchanger will cause the refrigeration performance to be weak, and the waste heat of the power battery, the electric drive, and the power supply device cannot be fully utilized. The outdoor evaporator is prone to frost formation, and the heating performance of the vehicle cannot meet the requirements, and the overall energy consumption is high.

[0004] In summary, the vehicle heat pump air conditioner system in the prior art cannot simultaneously consider good heating and refrigeration performance, and there is no design for utilizing waste heat for heating, resulting in the problem of high overall energy consumption of the pure electric vehicle. SUMMARY

[0005] The purpose of the present application is to provide a heat pump air conditioner thermal management system, a control method, a control device and a medium to solve the technical problem that the vehicle heat pump air conditioner system in the prior art cannot simultaneously consider good heating and refrigeration performance, resulting in high overall energy consumption of the pure electric vehicle.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0007] A heat pump air conditioner thermal management system is provided, comprising a first main circuit and a second main circuit, and the first main circuit and the second main circuit perform mutual heat exchange through a shared cooler;

[0008] The first main circuit comprises an indoor heat exchanger, and a compressor, an indoor condenser, an air conditioner three-way valve, an outdoor heat exchanger, a cooler, and a gas-liquid separator connected in series and constituting a circuit;

[0009] The inlet of the air conditioner three-way valve is connected to the outlet of the indoor condenser, the first outlet of the air conditioner three-way valve is connected to the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the gas-liquid separator;

[0010] The first port of the indoor heat exchanger is connected to the second outlet of the air conditioner three-way valve and the inlet of the gas-liquid separator, the second port of the indoor heat exchanger is connected to the inlet and outlet of the outdoor heat exchanger, and a one-way valve is arranged at the connection between the indoor heat exchanger and the inlet of the outdoor heat exchanger;

[0011] The second main circuit comprises, in sequence and in series, a power battery, a heat-sensitive heater, a cooler, a third water three-way valve, a power supply device, an electric drive device, a first water three-way valve, a radiator, and a second water three-way valve.

[0012] The inlet of the third water three-way valve is connected to the cooler, the first outlet of the third water three-way valve is connected to the power supply device, and the second outlet of the third water three-way valve is connected to the power battery.

[0013] Optionally, a first expansion valve is arranged between the first outlet of the air conditioner three-way valve and the inlet of the outdoor heat exchanger, and the second port of the indoor heat exchanger is connected between the air conditioner three-way valve and the first expansion valve.

[0014] Optionally, the outdoor heat exchanger further comprises an overcooling section, the outlet of the overcooling section is connected to the cooler and the second port of the indoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the gas-liquid separator and the inlet of a liquid reservoir, and the outlet of the liquid reservoir is connected to the inlet of the overcooling section.

[0015] Optionally, a third expansion valve is arranged between the outlet of the overcooling section and the cooler, the outlet of the indoor heat exchanger is connected between the outlet of the overcooling section and the third expansion valve, and a second expansion valve is arranged.

[0016] Optionally, a first electromagnetic valve is arranged at the inlet of the liquid reservoir, a second electromagnetic valve is arranged between the first port of the indoor heat exchanger and the inlet of the gas-liquid separator, and a third electromagnetic valve is arranged between the outlet of the outdoor heat exchanger and the inlet of the gas-liquid separator.

[0017] Optionally, the inlet of the first water three-way valve is connected to the electric drive device, the first outlet of the first water three-way valve is connected to the radiator, and the second outlet of the first water three-way valve is connected to the inlet of the second water three-way valve.

[0018] Optionally, the first outlet of the second water three-way valve is connected to the power battery, and the second outlet of the second water three-way valve is connected to the power supply device.

[0019] Optionally, a motor water pump is arranged at the inlet of the power supply device, and a battery water pump is arranged at the inlet of the power battery.

[0020] Optionally, the second main circuit further comprises an expansion tank, the outlet of the expansion tank is connected to the inlet of the second water three-way valve, and the inlet of the expansion tank is connected to the outlet of the radiator and the second outlet of the first water three-way valve.

[0021] A heat pump air conditioner thermal management system control method is provided, comprising:

[0022] System parameters in a heat pump air conditioner thermal management system in a vehicle are acquired, and an ambient temperature in which the vehicle is located is acquired, the heat pump air conditioner thermal management system being the heat pump air conditioner thermal management system described above, the system parameters including system pressure;

[0023] The heat pump air conditioner thermal management system is controlled according to an instruction receiving condition of the vehicle, the ambient temperature, and the system pressure.

[0024] Further, the heat pump air conditioner thermal management system is controlled according to the instruction receiving condition of the vehicle, the ambient temperature, and the system pressure, comprising:

[0025] When the ambient temperature is less than a first preset ambient temperature, a passenger compartment temperature raising instruction is received, and the system pressure does not satisfy a preset pressure condition, the heat pump air conditioner thermal management system is controlled to enter a single-condenser single-evaporator heating mode;

[0026] When the ambient temperature is less than the first preset ambient temperature, the passenger compartment temperature raising instruction is received, and the system pressure satisfies the preset pressure condition, the heat pump air conditioner thermal management system is controlled to enter a double-condenser single-evaporator heating mode.

[0027] Further, the system parameters further include a power battery temperature, after the system parameters in the heat pump air conditioner thermal management system in the vehicle are acquired, the method further comprises:

[0028] When the power battery temperature is greater than a preset battery temperature, and a passenger compartment temperature lowering instruction is not received, the heat pump air conditioner thermal management system is controlled to enter a power battery refrigeration mode;

[0029] When the power battery temperature is greater than the preset battery temperature, and the passenger compartment temperature lowering instruction is received, the heat pump air conditioner thermal management system is controlled to enter a single-condenser double-evaporator refrigeration mode.

[0030] Further, the system parameters further include system waste heat, after the system parameters in the heat pump air conditioner thermal management system in the vehicle are acquired, and the ambient temperature in which the vehicle is located is acquired, the method further comprises:

[0031] When the ambient temperature is less than a first preset ambient temperature, a passenger compartment temperature raising instruction is received, and system waste heat satisfies a preset waste heat condition, the heat pump air conditioner thermal management system is controlled to enter a double-condenser single-evaporator waste heat heating mode;

[0032] When the ambient temperature is less than the first preset ambient temperature, the passenger compartment temperature raising instruction is received, and the system waste heat does not satisfy the preset waste heat condition, the heat pump air conditioner thermal management system is controlled to enter a double-condenser double-evaporator waste heat heating mode.

[0033] Further, after obtaining the ambient temperature where the vehicle is located, the method further comprises:

[0034] When the ambient temperature is greater than the second preset ambient temperature, and the passenger compartment cooling instruction is received, the heat pump air conditioning thermal management system is controlled to enter the passenger compartment refrigeration mode.

[0035] Also provided is a heat pump air conditioning thermal management system control device, comprising:

[0036] The acquisition module is configured to acquire system parameters in the heat pump air conditioning thermal management system in the vehicle and obtain an ambient temperature where the vehicle is located, the heat pump air conditioning thermal management system being the heat pump air conditioning thermal management system described above, and the system parameters including system pressure.

[0037] The control module is configured to control the heat pump air conditioning thermal management system according to the instruction receiving condition of the vehicle, the ambient temperature and the system pressure.

[0038] The heat pump air conditioning thermal management system control device is provided, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the heat pump air conditioning thermal management system control method when executing the computer program.

[0039] A readable storage medium is provided, which stores a computer program, and the computer program implements the steps of the heat pump air conditioning thermal management system control method when executed by a processor.

[0040] Also provided is a vehicle comprising the heat pump air conditioning thermal management system described above.

[0041] The heat pump air conditioning thermal management system, the control method, the control device and the medium provided by the application have the following advantages:

[0042] The heat pump air conditioning thermal management system in the application comprises a first main circuit and a second main circuit, has a structure of double condensers and double evaporators, changes the flow direction and flow rate of refrigerant by switching control of valves, and realizes single-condenser single-evaporator, single-condenser double-evaporator refrigeration working modes, single-condenser single-evaporator, double-condenser single-evaporator and double-condenser double-evaporator heating working modes on the basis of the space of the approximate traditional air conditioner structure. The first main circuit and the second main circuit operate simultaneously during heating, and the waste heat of the power supply device, the electric drive device and the power battery is utilized for heating, thereby reducing frosting of the outdoor evaporator. The first main circuit is directly used for refrigerating the passenger compartment during refrigeration, and the temperature control requirements of the passenger compartment, the power supply device, the electric drive device and the power battery can be met in the most suitable energy-saving and efficient working mode, and the energy consumption of the vehicle is low. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0044] Figure 1 The overall schematic diagram of the heat pump air conditioning heat management system provided by an embodiment of the present application is shown in the figure.

[0045] Figure 2 The refrigerant flow schematic diagram of the passenger cabin refrigeration mode in an embodiment of the present application is shown in the figure.

[0046] Figure 3 The refrigerant flow schematic diagram of the power battery refrigeration mode in an embodiment of the present application is shown in the figure.

[0047] Figure 4 The refrigerant flow schematic diagram of the single-condenser double-evaporator refrigeration mode in an embodiment of the present application is shown in the figure.

[0048] Figure 5 The refrigerant flow schematic diagram of the single-condenser single-evaporator heating mode in an embodiment of the present application is shown in the figure.

[0049] Figure 6 The refrigerant flow schematic diagram of the double-condenser single-evaporator heating mode in an embodiment of the present application is shown in the figure.

[0050] Figure 7 The refrigerant flow schematic diagram of the double-condenser single-evaporator waste heat heating mode in an embodiment of the present application is shown in the figure.

[0051] Figure 8 The refrigerant flow schematic diagram of the double-condenser double-evaporator waste heat heating mode in an embodiment of the present application is shown in the figure.

[0052] Figure 9 The flow schematic diagram of the heat pump air conditioning heat management system control method in an embodiment of the present application is shown in the figure.

[0053] Figure 10 The structure schematic diagram of the heat pump air conditioning heat management system control device in an embodiment of the present application is shown in the figure.

[0054] Figure 11 The structure schematic diagram of the heat pump air conditioning heat management system control device in an embodiment of the present application is shown in the figure.

[0055] In the figure, various reference signs are as follows:

[0056] 1-compressor; 2-indoor condenser; 3-air conditioning three-way valve; 4-one-way valve; 5-first expansion valve; 6-outdoor heat exchanger; 7-first electromagnetic valve; 8-accumulator; 9-subcooling section; 10-second expansion valve; 11-indoor heat exchanger; 12-second electromagnetic valve; 13-third electromagnetic valve; 14-third expansion valve; 15-cooler; 16-gas-liquid separator; 17-motor water pump; 18-power supply device; 19-electric drive device; 20-first water three-way valve; 21-radiator; 22-expansion tank; 23-second water three-way valve; 24-battery water pump; 25-battery; 26-PTC heater; 27-third water three-way valve. DETAILED DESCRIPTION

[0057] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0058] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0059] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0060] Please refer to Figures 1 to 8 , a heat pump air conditioning thermal management system, a control method and a vehicle provided by the embodiments of the present application will be described.

[0061] As shown in Figure 1 , the heat pump air conditioning thermal management system in the present embodiment includes a first main circuit and a second main circuit, and the first main circuit and the second main circuit exchange heat with each other through a shared cooler 15.

[0062] Specifically, the first main circuit comprises the indoor heat exchanger 11, and the compressor 1, the indoor condenser 2, the air conditioning three-way valve 3, the outdoor heat exchanger 6, the cooler 15, and the gas-liquid separator 16 connected in series and constituting a circuit. The inlet of the air conditioning three-way valve 3 is connected to the outlet of the indoor condenser 2, the first outlet of the air conditioning three-way valve 3 is connected to the outdoor heat exchanger 6. The outlet of the outdoor heat exchanger 6 is connected to the gas-liquid separator 16. The first port of the indoor heat exchanger 11 is connected to the second outlet of the air conditioning three-way valve 3 and the inlet of the gas-liquid separator 16, the second port of the indoor heat exchanger 11 is connected to the inlet and outlet of the outdoor heat exchanger 6, and a one-way valve 4 is arranged at the connection between the indoor heat exchanger 11 and the inlet of the outdoor heat exchanger 6. The compressor 11 is an electric compressor 1.

[0063] Specifically, the second main circuit comprises the power battery 25, the heat-sensitive heater 26 (PTC heater 26), the cooler 15, the third water three-way valve 27, the power supply device 18, the electric drive device 19, the first water three-way valve 20, the radiator 21, and the second water three-way valve 23 connected in series and constituting a circuit. The inlet of the third water three-way valve 27 is connected to the cooler 15, the first outlet of the third water three-way valve 27 is connected to the power supply device 18, and the second outlet of the third water three-way valve 27 is connected to the power battery 25.

[0064] The inlet of the outdoor heat exchanger 6 is provided with a first expansion valve 5. The second port of the indoor heat exchanger 11 is provided with a second expansion valve 10. The inlet of the cooler 15 in the first main circuit is provided with a third expansion valve 14. The second port of the indoor heat exchanger 11 is connected between the air conditioning three-way valve 3 and the first expansion valve 5, and the connection between the indoor heat exchanger 11 and the inlet of the outdoor heat exchanger 6 is between the second expansion valve 10 and the second port of the indoor heat exchanger 11. The first expansion valve 5, the second expansion valve 10, and the third expansion valve 14 are all electronic expansion valves, realizing automatic control of each expansion valve.

[0065] (1) Passenger cabin refrigeration mode: when the ambient temperature is high and the passenger cabin temperature needs to be reduced, the second main circuit is closed, the cooler 15 is controlled to be inoperative, the first outlet of the air conditioning three-way valve 3 is opened, and the electric compressor 1 is started, as shown in FIG. 2. The refrigerant flowing out of the electric compressor 1 flows through the indoor condenser 2 (at this time, the indoor condenser 2 has no heat exchange), then flows into the outdoor heat exchanger 6 through the first outlet of the air conditioning three-way valve 3 for heat exchange, the heat-exchanged refrigerant flows into the indoor heat exchanger 11 for secondary heat exchange, the twice heat-exchanged refrigerant flows through the gas-liquid separator 16, and finally returns to the electric compressor 1, thereby cooling and reducing the temperature of the passenger cabin through the indoor heat exchanger 11. Figure 2

[0066] (2) Power battery refrigeration mode: when the temperature of the power battery 25 is higher than a set value, but the passenger cabin does not need to be cooled, the indoor heat exchanger 11 is inoperative while the cooler 15 is operative, and the electric compressor 1 is started, as shown in FIG. 3.​Figure 3 As shown, the refrigerant flowing out of the electric compressor 1 flows through the indoor condenser 2 (at this time, the indoor condenser 2 does not exchange heat), and then flows into the outdoor heat exchanger 6 through the first outlet of the air conditioning three-way valve 3 for heat exchange. After heat exchange, the refrigerant flows into the cooler 15 and exchanges heat with the coolant in the cooler 15. After heat exchange, the refrigerant with increased temperature flows into the gas-liquid separator 16 and then returns to the electric compressor 1. The power battery 25 can be cooled down through the cooler 15.

[0067] (3) Single condenser dual evaporator cooling mode: When the temperature of the power battery 25 is higher than the set value and the passenger compartment needs to be cooled, the passage between the outlet of the outdoor heat exchanger 6 and the inlet of the gas-liquid separator 16 is disconnected, and the electric compressor 1 starts. Figure 4 As shown, the refrigerant flows through the indoor condenser 2 (without heat exchange), the air conditioning three-way valve 3, and the first expansion valve 5 (fully open), and enters the outdoor heat exchanger 6 for heat exchange. After heat exchange, the refrigerant is divided into two paths: one path passes through the third expansion valve 14 (operating), and after the third expansion valve 14 is activated, it enters the cooler 15, where it exchanges heat with the coolant in the second main circuit. The refrigerant with increased temperature flows through the gas-liquid separator 16 and then returns to the electric compressor 1, thus achieving cooling of the power battery 25 through the cooler 15; the other path passes through the second expansion valve 10 (operating), and after the second expansion valve 10 is activated, it enters the indoor heat exchanger 11 for heat exchange, then flows through the gas-liquid separator 16 and returns to the electric compressor 1, where it achieves cooling of the passenger compartment through the indoor heat exchanger 11, forming another heat exchange cycle. In this mode, the coolant flows sequentially through the power battery 25, PTC heater 26, cooler 15, and third water three-way valve 27, then returns to the power battery 25, forming a heat exchange cycle. Figure 3 The thick black arrow in the image represents the refrigerant flow process when the power battery 25 is at a high temperature, and cooling is performed on the power battery 25.

[0068] (4) Single condenser and single evaporator heating mode: When the ambient temperature is low and the passenger compartment needs to be heated, the passage between the first port of the indoor heat exchanger 11 and the gas-liquid separator 16 is disconnected, the second outlet of the air conditioning three-way valve 3 is closed, and the electric compressor 1 starts. Figure 5 As shown, the refrigerant flows into the indoor condenser 2 for heat exchange. After heat exchange, the refrigerant flows through the air conditioning three-way valve 3, and then enters the first expansion valve 5 (working) through the first outlet of the air conditioning three-way valve 3. After the first expansion valve 5 is activated, it flows into the outdoor heat exchanger 6 for heat exchange. After heat exchange, it flows into the gas-liquid separator 16, and then returns to the electric compressor 1. The indoor condenser 2 is used to heat the passenger compartment.

[0069] (5) Dual-condenser single-evaporator heating mode: When the ambient temperature is low and the passenger compartment needs to be heated, and the temperature and pressure in the circuit meet certain conditions, the first outlet of the air conditioning three-way valve 3 is closed. The passage between the first port of the indoor heat exchanger 11 and the gas-liquid separator 16 is disconnected, the relevant passage of the cooler 15 is disconnected, and the electric compressor 1 starts. Figure 6 As shown, the refrigerant flows into the indoor condenser 2 for heat exchange, and after heat exchange, it enters the indoor heat exchanger 11 through the air conditioning three-way valve 3 for further heat exchange. The refrigerant then flows through the one-way valve 4 and then into the first expansion valve 5 (operating). After the first expansion valve 5 is activated, it flows into the outdoor heat exchanger 6 for heat exchange. The refrigerant after heat exchange then flows directly into the gas-liquid separator 16 and finally returns to the electric compressor 1. The heating of the passenger compartment is achieved through the indoor condenser 2 and the indoor heat exchanger 11.

[0070] (6) Dual-condenser single-evaporator waste heat heating mode: When the ambient temperature is low and the passenger compartment needs to be heated, but the vehicle has sufficient waste heat, the passage between the first port of the indoor heat exchanger 11 and the gas-liquid separator 16 is disconnected, and the passage between the outlet of the outdoor heat exchanger 6 and the inlet of the gas-liquid separator 16 is disconnected. The electric compressor 1 starts, such as... Figure 7 As shown, refrigerant flows into the indoor condenser 2 for heat exchange. After heat exchange, the refrigerant flows through the air conditioning three-way valve 3 into the indoor heat exchanger 11 for further heat exchange. Then, after heat exchange, the refrigerant flows into the fully open second expansion valve 10, and then into the third expansion valve 14 (at this time, the third expansion valve 14 is working). After passing through the third expansion valve 14, the refrigerant flows into the cooler 15, where it exchanges heat with the coolant in the second main circuit. After heat exchange, it flows into the gas-liquid separator 16 and returns to the electric compressor 1. In this mode, the coolant in the second main circuit flows sequentially through the power battery 25, PTC heater 26, cooler 15, third water three-way valve 27, motor water pump 17, power supply unit 18, electric drive unit 19, first water three-way valve 20, and second water three-way valve 23, and then returns to the power battery 25, forming a heat exchange cycle. In this mode, the indoor heat exchanger 11 acts as an evaporator, and the cooler 15 absorbs waste heat from the vehicle to heat the passenger compartment.

[0071] (7) Dual condenser and dual evaporator waste heat heating mode: When the ambient temperature is low and the passenger compartment needs to be heated, but the vehicle's waste heat is insufficient, the passage between the first port of the indoor heat exchanger 11 and the gas-liquid separator 16 is disconnected, and the electric compressor 1 starts. Figure 8As shown, the refrigerant flows into the indoor condenser 2 for heat exchange, then enters the indoor heat exchanger 11 through the air conditioner three-way valve 3 for heat exchange, and thereafter the refrigerant is divided into two paths: the first path of refrigerant enters the first expansion valve 5 (working) through the one-way valve 4, and enters the outdoor heat exchanger 6 for heat exchange under the action of the first expansion valve 5, and the heat-exchanged refrigerant directly flows into the gas-liquid separator 16 and returns to the electric compressor 1; the second path of refrigerant passes through the fully open second expansion valve 10, and enters the third expansion valve 14 (working), and enters the cooler 15 for heat exchange with the cooling liquid of the second main circuit after the action of the third expansion valve 14, and enters the gas-liquid separator 16 after heat exchange and returns to the electric compressor 1. In this mode, the cooling liquid of the second main circuit flows through the power battery 25, the PTC heater 26 (which can be opened for heating), the cooler 15, the third water three-way valve 27, the motor water pump 17, the power supply device 18, the electric drive device 19, the first water three-way valve 20, the expansion tank 22, the second water three-way valve 23, and then returns to the power battery water pump 25, forming a heat exchange cycle. The heating of the passenger compartment is implemented by absorbing environmental heat through the outdoor heat exchanger 6 and absorbing vehicle waste heat through the cooler 15.

[0072] The first main circuit described above mainly manages the temperature in the passenger compartment through the indoor condenser 2, the indoor heat exchanger 11 and the outdoor heat exchanger 6, the second main circuit mainly manages the temperature of the power battery 25, the power supply device 18 and the electric drive device 19 through the radiator 21 and the cooler 15, and the first main circuit and the second main circuit can exchange heat through the cooler 15 to realize heat exchange between the first main circuit and the second main circuit. The heat pump air conditioning thermal management system in this embodiment, on the basis of ensuring the thermal management of the passenger compartment, the power battery 25, the power supply device 18 and the electric drive device 19, utilizes the waste heat of the power battery 25, the power supply device 18 and the electric drive device 19 on the vehicle to adjust the temperature of the passenger compartment, thereby improving the heating performance of the heat pump air conditioning thermal management system.

[0073] In this embodiment, the flow direction of the refrigerant can be controlled by switching control of the valves according to the specific working condition requirements of the heat pump air conditioning thermal management system, so that the indoor heat exchanger 11 and the outdoor heat exchanger 6 can be used as condensers, and the indoor heat exchanger 11 and the outdoor heat exchanger 6 can also be used as evaporators, that is, the indoor condenser 2, the indoor heat exchanger 11 and the outdoor heat exchanger 6 can all be used as condensers, and the cooler 15, the indoor heat exchanger 11 and the outdoor heat exchanger 6 can all be used as evaporators. Through the control of the above-mentioned paths or specific structures, various temperature control circuits can be realized to meet the needs of various subdivided temperature control scenarios, including but not limited to the following scenarios:

[0074] In Figures 2 to 8 , the black thick arrows in each figure are the flow directions of the refrigerant in different modes.

[0075] As can be seen from the above, the heat pump air conditioning heat management system in the embodiment is a direct heat pump air conditioning system, has a structure of three condensers and three evaporators, and can realize single-condenser single-evaporator, single-condenser double-evaporator refrigeration working modes and single-condenser single-evaporator, double-condenser single-evaporator, double-condenser double-evaporator heating working modes by switching control of the valves to change the flow direction of the refrigerant on the basis of the approximate structure space of the traditional air conditioner. In heating, the first main circuit and the second main circuit operate at the same time, and the waste heat of the power supply device 18, the electric drive device 19 and the power battery 25 is utilized for heating, thereby reducing the frosting of the outdoor evaporator, and in refrigeration, the first main circuit is directly used to refrigerate the passenger compartment, so that the heat pump air conditioning heat management system can efficiently heat and refrigerate to meet the temperature control requirements of the passenger compartment, the power supply device 18, the electric drive device 19 and the power battery 25 in the most suitable energy-saving and efficient working mode, can meet the heat management requirements in various environmental temperatures and driving conditions, and can keep high efficiency and low energy consumption, thereby saving the energy consumption of the whole vehicle and improving the cruising range of the electric vehicle. Meanwhile, the heat pump air conditioning heat management system can overcome the problems of low energy efficiency ratio, small heating capacity and easy frosting of the external evaporator of the traditional heat pump air conditioner in low environmental temperature, and can improve the stability and comfort of the operation of the heat pump air conditioner.

[0076] Optionally, the outdoor heat exchanger 6 is further provided with a supercooling section, the outlet of the supercooling section is connected to the second port of the cooler 15 and the indoor heat exchanger 11, the outlet of the outdoor heat exchanger 6 is connected to the inlet of the gas-liquid separator 16 and the inlet of the liquid accumulator 8, and the outlet of the liquid accumulator 8 is connected to the inlet of the supercooling section. The refrigerant flowing out of the outdoor heat exchanger 6 can enter the supercooling section for supercooling through the liquid accumulator 8, the liquid accumulator 8 stores a certain amount of refrigerant, which can supplement the refrigerant in the system as needed to ensure the stability of the flow and pressure of the refrigerant and meet the requirements. In each refrigeration mode, the refrigerant entering the outdoor heat exchanger 6 for heat exchange, the refrigerant flowing out of the outdoor heat exchanger 6 is controlled to flow into the liquid accumulator 8, then flow into the supercooling section, and then flow into the indoor heat exchanger 11 and / or the cooler 15 according to actual requirements. After the refrigerant is heat-exchanged in the outdoor heat exchanger, the refrigerant is further cooled in the supercooling section of the outdoor heat exchanger 6 to improve the refrigeration effect of the system.

[0077] Optionally, a third expansion valve 14 is arranged between the outlet of the supercooling section and the cooler 15, and the outlet of the indoor heat exchanger 11 is connected between the outlet of the supercooling section and the third expansion valve 14 and is provided with a second expansion valve 10. The temperature of the refrigerant in the supercooling section can be further reduced, and the flow of the refrigerant flowing out of the supercooling section is controlled by the third expansion valve 14 to enter the cooler 15 to meet the refrigerant flow requirement of the cooler 15 as an evaporator. Similarly, the flow of the refrigerant flowing out of the supercooling section is controlled by the second expansion valve 10 to enter the indoor heat exchanger 11 to meet the refrigerant flow requirement of the indoor heat exchanger 11 as an evaporator.

[0078] Optionally, a first electromagnetic valve 7 is arranged at the inlet of the liquid reservoir 8; a second electromagnetic valve 12 is arranged between the first port of the indoor heat exchanger 11 and the inlet of the gas-liquid separator 16; a third electromagnetic valve 13 is arranged between the outlet of the outdoor heat exchanger 6 and the inlet of the gas-liquid separator 16. The first electromagnetic valve 7 can control the opening and closing of the passage between the outdoor heat exchanger 6 and the liquid reservoir 8, the second electromagnetic valve 12 can control the opening and closing of the passage between the first port of the indoor heat exchanger 11 and the inlet of the gas-liquid separator 16, and the third electromagnetic valve 13 can control the opening and closing of the passage between the outlet of the outdoor heat exchanger 6 and the inlet of the gas-liquid separator 16, so as to facilitate the automatic control of the passages of the system.

[0079] Optionally, the inlet of the first water three-way valve 20 is connected to the electric drive device 19, the first outlet of the first water three-way valve 20 is connected to the radiator 21, and the second outlet of the first water three-way valve 20 is connected to the inlet of the second water three-way valve 23. The first water three-way valve 20 can control the opening and closing of the passage between the inlet and the first outlet and the second outlet. When the inlet of the first water three-way valve 20 is in communication with the first outlet and closed with the second outlet, the cooling liquid flows out of the electric drive device 19 into the radiator 21 to dissipate heat and reduce the temperature of the cooling liquid. When the inlet of the first water three-way valve 20 is closed with the first outlet and in communication with the second outlet, the cooling liquid flows out of the electric drive device 19 into the second water three-way valve 23 and finally flows through the cooler 15 to transfer heat to the first main circuit.

[0080] Optionally, the first outlet of the second water three-way valve 23 is connected to the power battery 25, and the second outlet of the second water three-way valve 23 is connected to the power supply device 18. When the inlet of the second water three-way valve 23 is in communication with the first outlet and closed with the second outlet, the cooling liquid flowing out of the electric drive device 19 and the power supply device 18 flows into the circuit where the power battery 25 is located, realizing the conduction of the entire second circuit and finally transferring heat to the first main circuit. When the inlet of the second water three-way valve 23 is closed with the first outlet and in communication with the second outlet, it is equivalent to disconnecting the circuits where the electric drive device 19 and the power supply device 18 are located from the circuit where the power battery 25 is located, and circulating separately, so as to independently circulate and dissipate heat in the circuits of the electric drive device 19 and the power supply device 18, avoiding the transfer of heat to the circuit where the power battery 25 is located.

[0081] Optionally, a motor water pump 17 is arranged at the inlet of the power supply device 18; a battery water pump 24 is arranged at the inlet of the power battery 25. When the inlet of the second water three-way valve 23 is closed with the first outlet and communicated with the second outlet, the circuit where the electric drive device 19 and the power supply device 18 are located is cut off from the circuit where the power battery 25 is located, the motor water pump 17 can drive the cooling liquid in the circuit where the electric drive device 19 and the power supply device 18 are located to circulate, and the battery water pump 24 can drive the cooling liquid in the circuit where the power battery 25 is located to circulate. It is easy to understand that when the entire second main circuit is conducted, the motor water pump 17 and the battery water pump 24 can also work simultaneously or separately to drive the cooling liquid to circulate in the entire second main circuit.

[0082] Optionally, the second main circuit further comprises an expansion tank 22, the outlet of the expansion tank 22 is connected to the inlet of the second water three-way valve 23, and the inlet of the expansion tank 22 is connected to the outlet of the radiator 21 and the second outlet of the first water three-way valve 20. The expansion tank 22 functions to store and supplement the cooling liquid. When the temperature is high, the volume of the cooling liquid expands, and the excess in the system enters the expansion tank 22. When the temperature is low, the volume of the cooling liquid shrinks, and the cooling liquid in the expansion tank 22 is supplemented into the system. The cooling liquid in the system can be supplemented as needed to ensure that the flow and pressure of the cooling liquid are stable and meet the requirements.

[0083] The embodiment also provides a vehicle comprising the heat pump air conditioner thermal management system.

[0084] When the vehicle is running, the heat pump air conditioner thermal management system on the vehicle comprises but is not limited to the following modes:

[0085] The passenger compartment refrigeration mode is as shown in Figure 2 When the ambient temperature is high and the driver selects the passenger compartment cooling, the electric compressor 1 is started, the third electromagnetic valve 13 is closed, the refrigerant flows through the indoor condenser 2 (without heat exchange), the air conditioner three-way valve 3, the first expansion valve 5 (fully open), the outdoor heat exchanger 6 (heat exchange), the first electromagnetic valve 7 (open), the liquid accumulator 8, the subcooling section 9, the second expansion valve 10 (working), the indoor heat exchanger 11 (heat exchange), the second electromagnetic valve 12 (open), the gas-liquid separator 16 returns to the electric compressor 1, and the cooling and cooling of the passenger compartment is implemented through the heat exchanger 11.

[0086] The power battery refrigeration mode is as shown in Figure 3As shown: when the temperature of the power battery 25 is higher than its set value, the electric compressor 1 starts, the second electromagnetic valve 12 and the third electromagnetic valve 13 are closed, the refrigerant flows through the indoor condenser 2 (no heat exchange), the air conditioning three-way valve 3, the first expansion valve 5 (fully open), the outdoor heat exchanger 6 (heat exchange), the first electromagnetic valve 7 (open), the liquid accumulator 8, the supercooling section 9, the third expansion valve 14 (working), the cooler 15 (at this time, the cooler 15 works, that is, the battery water pump 24 starts, the cooling liquid flows through the power battery 25, the PTC heater 26, the cooler 15, the third water three-way valve 27, and returns to the battery water pump 24 to form a heat exchange cycle), the gas-liquid separator 16 returns to the electric compressor 1, and the cooling and temperature reduction of the power battery 25 are implemented through the cooler 15.

[0087] Single-condenser double-evaporator refrigeration mode as shown in Figure 4 As shown: when the temperature of the power battery 25 is higher than its set value and the driver selects the passenger compartment cooling, the electric compressor 1 starts, the third electromagnetic valve 13 is closed, the refrigerant flows through the indoor condenser 2 (no heat exchange), the air conditioning three-way valve 3, the first expansion valve 5 (fully open), the outdoor heat exchanger 6 (heat exchange), the first electromagnetic valve 7 (open), the liquid accumulator 8, the supercooling section 9, at this time, the refrigerant is divided into two paths, the first path passes through the third expansion valve 14 (working), the cooler 15 (at this time, the cooler 15 works, that is, the battery water pump 24 starts, the cooling liquid flows through the power battery 25, the PTC heater 26, the cooler 15, the third water three-way valve 27, and returns to the battery water pump 24 to form a heat exchange cycle), the gas-liquid separator 16 returns to the electric compressor 1, and the cooling and temperature reduction of the power battery 25 are implemented through the cooler 15. The second path passes through the second expansion valve 10 (working), the indoor heat exchanger 1 (heat exchange), the second electromagnetic valve 12 (open), the gas-liquid separator 16 returns to the electric compressor 1, and the cooling and temperature reduction of the passenger compartment are implemented through the heat exchanger 11 to form another heat exchange cycle.

[0088] Single-condenser single-evaporator heating mode as shown in Figure 5 As shown: when the ambient temperature is low and the driver selects the passenger compartment heating, the electric compressor 1 starts, the first electromagnetic valve 7 and the second electromagnetic valve 12 are closed, the refrigerant flows through the indoor condenser 2 (heat exchange), the air conditioning three-way valve 3, the first expansion valve 5 (working), the outdoor heat exchanger 6 (heat exchange), the third electromagnetic valve 13 (open), the gas-liquid separator 16 returns to the electric compressor 1, and the heating of the passenger compartment is implemented through the indoor condenser 2.

[0089] Double-condenser single-evaporator heating mode as shown in Figure 6As shown: when the ambient temperature is low and the driver selects the passenger compartment to be warmed up, and the temperature and pressure of the heat pump system meet certain conditions, the electric compressor 1 starts, the first electromagnetic valve 7 and the second electromagnetic valve 12 are closed, the refrigerant flows through the indoor condenser 2 (heat exchange), the air conditioning three-way valve 3, the indoor heat exchanger 11 (heat exchange), the one-way valve 4, the first expansion valve 5 (work), the outdoor heat exchanger 6 (heat exchange), the third electromagnetic valve 13 (open), the gas-liquid separator 16 returns to the electric compressor 1, and the heating of the passenger compartment is implemented through the indoor condenser 2 and the indoor heat exchanger 11.

[0090] The double-condenser single-evaporator waste heat heating mode is as shown in Figure 7 As shown: when the ambient temperature is low and the driver selects the passenger compartment to be warmed up, and the vehicle waste heat is sufficient, the electric compressor 1 starts, the first electromagnetic valve 7, the second electromagnetic valve 12 and the third electromagnetic valve 13 are closed, the refrigerant flows through the indoor condenser 2 (heat exchange), the air conditioning three-way valve 3, the indoor heat exchanger 11 (heat exchange), the second expansion valve 10 (fully open), the third expansion valve 14 (work), the cooler 15 (at this time, the cooler 15 works, that is, the battery water pump 24 and the motor water pump 17 start, the cooling liquid flows through the power battery 25, the PTC heater 26, the cooler 15, the third water three-way valve 27, the motor water pump 17, the power supply device 18, the electric drive device 19, the first water three-way valve 20, the expansion tank 22, the second water three-way valve 23 in turn, and returns to the battery water pump 24 to form a heat exchange cycle), the gas-liquid separator 16 returns to the electric compressor 1, and the heating of the passenger compartment is implemented by absorbing the vehicle waste heat through the cooler 15.

[0091] The double-condenser double-evaporator waste heat heating mode is as shown in Figure 8 As shown: when the ambient temperature is low and the driver selects the passenger compartment to be warmed up, and the vehicle waste heat is not sufficient, the electric compressor 1 starts, the first electromagnetic valve 7 and the third electromagnetic valve 12 are closed, the refrigerant flows through the indoor condenser 2 (heat exchange), the air conditioning three-way valve 3, the indoor heat exchanger 11 (heat exchange), at this time the refrigerant is divided into two paths, the first path passes through the one-way valve 4, the first expansion valve 5 (work), the outdoor heat exchanger 6 (heat exchange), the third electromagnetic valve 13 (open), the gas-liquid separator 16 returns to the electric compressor 1, the second path passes through the second expansion valve 10 (fully open), the third expansion valve 14 (work), the cooler 15 (at this time, the cooler 15 works, that is, the battery water pump 24 and the motor water pump 17 start, the cooling liquid flows through the power battery 25, the PTC heater 26, the cooler 15, the third water three-way valve 27, the motor water pump 17, the power supply device 18, the electric drive device 19, the first water three-way valve 20, the expansion tank 22, the second water three-way valve 23 in turn, and returns to the battery water pump 24 to form a heat exchange cycle), the gas-liquid separator 16 returns to the electric compressor 1, and the heating of the passenger compartment is implemented by absorbing the ambient heat through the outdoor heat exchanger 6 and the vehicle waste heat through the cooler 15.

[0092] The vehicle in the embodiment can realize single-condenser single-evaporator, single-condenser double-evaporator, double-condenser single-evaporator, double-condenser double-evaporator and other working modes through the control of the heat pump air conditioner thermal management system, so as to meet the thermal management of the vehicle under various environmental temperatures and different driving conditions, maintain the high efficiency and low energy consumption of the heat pump air conditioner, realize the saving of the energy consumption of the vehicle, improve the cruising range of the electric vehicle, overcome the problems of low energy efficiency ratio, low heating capacity and easy frosting of the external evaporator of the heat pump air conditioner under low environmental temperature in the traditional vehicle, and improve the operation stability and comfort of the heat pump air conditioner on the vehicle.

[0093] In an embodiment, as shown in Figure 9 , a heat pump air conditioner thermal management system control method is provided, which is described by taking the heat pump air conditioner thermal management system in Figure 1 as an example and includes the following steps:

[0094] S10: Obtain system parameters in the heat pump air conditioner thermal management system in the vehicle and obtain the environmental temperature of the vehicle, wherein the system parameters include the temperature of the power battery and the system pressure.

[0095] In the process of vehicle operation, the heat pump air conditioner thermal management system control device needs to obtain the system parameters in the heat pump air conditioner thermal management system in the vehicle in real time and obtain the environmental temperature of the vehicle, wherein the system parameters include the system pressure.

[0096] S20: Control the heat pump air conditioner thermal management system according to the instruction receiving condition, the environmental temperature and the system pressure.

[0097] After obtaining the environmental temperature and the system pressure in the heat pump air conditioner thermal management system, the heat pump air conditioner thermal management system is controlled according to the instruction receiving condition, the environmental temperature and the system pressure of the vehicle, the temperature of the passenger compartment in the vehicle is controlled according to the actual demand of the user, and the overcooling or overheating of the passenger compartment is avoided, so as to reduce the user experience.

[0098] In the embodiment, the system parameters in the heat pump air conditioner thermal management system in the vehicle are obtained, the environmental temperature of the vehicle is obtained, the heat pump air conditioner thermal management system is the heat pump air conditioner thermal management system described above, the system parameters include the system pressure, and then the heat pump air conditioner thermal management system is controlled according to the instruction receiving condition, the environmental temperature and the system pressure of the vehicle. The temperature of the passenger compartment can be controlled according to the actual demand, so as to meet the thermal management of the vehicle under various environmental temperatures and different driving conditions, maintain the high efficiency and low energy consumption of the heat pump air conditioner, realize the saving of the energy consumption of the vehicle, and improve the cruising range of the electric vehicle.

[0099] In an embodiment, in step S20, the heat pump air conditioner thermal management system is controlled according to the instruction receiving condition, the environmental temperature and the system pressure of the vehicle, and specifically includes the following steps:

[0100] S21: When the ambient temperature is less than the first preset ambient temperature, and the passenger cabin temperature rising instruction is received, and the system pressure does not meet the preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter the single-condenser single-evaporator heating mode.

[0101] S22: When the ambient temperature is less than the first preset ambient temperature, and the passenger cabin temperature rising instruction is received, and the system pressure meets the preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter the double-condenser single-evaporator heating mode.

[0102] Specifically, after obtaining the ambient temperature in which the vehicle is located and determining the system pressure of the heat pump air conditioning thermal management system, it is determined whether the ambient temperature is less than the first preset ambient temperature; if the ambient temperature is less than the first preset ambient temperature, it indicates that the external temperature is low, it is determined whether the passenger cabin temperature rising instruction is received to determine whether there is a passenger cabin temperature rising demand, and it is determined whether the system pressure meets the preset pressure condition to implement different heating modes according to different pressure states.

[0103] After determining whether the passenger cabin temperature rising instruction is received and determining whether the system pressure meets the preset pressure condition, if the passenger cabin temperature rising instruction is received and the system pressure does not meet the preset pressure condition, it indicates that there is a passenger cabin temperature rising demand and the system pressure of the heat pump air conditioning thermal management system does not meet the condition, the heat pump air conditioning thermal management system is controlled to enter the single-condenser single-evaporator heating mode, and the heating of the passenger cabin is implemented by the indoor condenser. Wherein, in the single-condenser single-evaporator heating mode, the control of each element of the heat pump air conditioning thermal management system is as described above, the refrigerant flow path of the single-condenser single-evaporator heating mode is as shown in FIG. 5, and details are not described herein again. Figure 5

[0104] After determining whether the passenger cabin temperature rising instruction is received and determining whether the system pressure meets the preset pressure condition, if the passenger cabin temperature rising instruction is received and the system pressure meets the preset pressure condition, it indicates that there is a passenger cabin temperature rising demand and the system pressure of the heat pump air conditioning thermal management system is high, and the system pressure meets the condition, the heat pump air conditioning thermal management system is controlled to enter the double-condenser single-evaporator heating mode, and the heating of the passenger cabin is implemented by the indoor condenser and the indoor heat exchanger. Wherein, in the double-condenser single-evaporator heating mode, the control of each element of the heat pump air conditioning thermal management system is as described above, the refrigerant flow path of the double-condenser single-evaporator heating mode is as shown in FIG. 6, and details are not described herein again. Figure 6

[0105] ​​In this embodiment, when the ambient temperature is less than the first preset ambient temperature, and the passenger cabin temperature rising instruction is received, and the system pressure does not satisfy the preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter the single-condenser single-evaporator heating mode; when the ambient temperature is less than the first preset ambient temperature, and the passenger cabin temperature rising instruction is received, and the system pressure satisfies the preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter the double-condenser single-evaporator heating mode, the specific steps of controlling the heat pump air conditioning thermal management system according to the instruction receiving condition of the vehicle, the ambient temperature and the system pressure are determined, different heating modes are implemented according to the actual demand and the system pressure, the energy of the heat pump air conditioning thermal management system is fully utilized, and the control precision of the heat pump air conditioning thermal management system is improved.

[0106] In an embodiment, the system parameters of the heat pump air conditioning thermal management system further include a power battery temperature, the heat pump air conditioning thermal management system can be controlled according to the power battery temperature and the instruction receiving condition of the vehicle, and after step S10, that is, after the system parameters in the heat pump air conditioning thermal management system in the vehicle are acquired, the method further includes the following steps.

[0107] S31: when the power battery temperature is greater than the preset battery temperature, and the passenger cabin temperature lowering instruction is not received, the heat pump air conditioning thermal management system is controlled to enter the power battery refrigeration mode.

[0108] After the battery temperature in the heat pump air conditioning thermal management system is acquired, the heat pump air conditioning thermal management system is controlled according to the power battery temperature and the instruction receiving condition of the vehicle, specifically, when it is found that the power battery temperature is greater than the preset battery temperature, and the passenger cabin temperature lowering instruction is not received, it indicates that the passenger cabin temperature is moderate, and the passenger cabin does not need to be cooled down, at this time, the heat pump air conditioning thermal management system only needs to be controlled to enter the power battery refrigeration mode, so as to cool and lower the temperature of the power battery through the cooler in the heat pump air conditioning thermal management system. In the power battery refrigeration mode, the control of each element of the heat pump air conditioning thermal management system is as described above, and the refrigerant flow path of the power battery refrigeration mode is as shown in FIG. 6, which will not be described herein again. Figure 3

[0109] S32: when the power battery temperature is greater than the preset battery temperature, and the passenger cabin temperature lowering instruction is received, the heat pump air conditioning thermal management system is controlled to enter the single-condenser double-evaporator refrigeration mode.

[0110] ​After the battery temperature in the heat pump air conditioning thermal management system is acquired, the heat pump air conditioning thermal management system is controlled according to the power battery temperature and the instruction receiving condition of the vehicle. Specifically, when it is found that the power battery temperature is greater than the preset battery temperature and no passenger compartment cooling instruction is received, it indicates that the power battery temperature is too high and the passenger compartment temperature is high, and the passenger compartment needs to be cooled, and the heat pump air conditioning thermal management system needs to be controlled to enter a single-condenser double-evaporator refrigeration mode, so as to cool the power battery through the cooler in the heat pump air conditioning thermal management system and cool the passenger compartment through the indoor heat exchanger. In the single-condenser double-evaporator refrigeration mode, the control of each element of the heat pump air conditioning thermal management system is as described above, the refrigerant flow path of the single-condenser double-evaporator refrigeration mode is as shown in FIG. 8, and details are not described herein again. Figure 4

[0111] The passenger compartment cooling instruction can be a passenger compartment cooling instruction sent by the driver.

[0112] For example, after the power battery temperature is acquired, it is determined whether the power battery temperature is greater than the preset battery temperature. If the power battery temperature is greater than the preset battery temperature, it is determined whether a passenger compartment cooling instruction sent by the driver is received. If no passenger compartment cooling instruction is received, the heat pump air conditioning thermal management system is controlled to enter a power battery refrigeration mode. If the passenger compartment cooling instruction is received, the heat pump air conditioning thermal management system is controlled to enter a single-condenser double-evaporator refrigeration mode. According to the actual instruction condition of the driver, different thermal management is performed to meet the actual demand.

[0113] In this embodiment, after the battery temperature in the heat pump air conditioning thermal management system is acquired, when the power battery temperature is greater than the preset battery temperature and no passenger compartment cooling instruction is received, the heat pump air conditioning thermal management system is controlled to enter a power battery refrigeration mode. When the power battery temperature is greater than the preset battery temperature and the passenger compartment cooling instruction is received, the heat pump air conditioning thermal management system is controlled to enter a single-condenser double-evaporator refrigeration mode, and different mode thermal control of the heat pump air conditioning thermal management system is performed according to the passenger compartment cooling instruction to meet the demand of different driving conditions. According to the actual demand of the user, the power battery of the vehicle is heated or cooled in time to prevent the power battery from being too cold or too hot and thus to reduce the performance of the power battery and the vehicle.

[0114] In an embodiment, the system parameters of the heat pump air conditioning thermal management system further include system waste heat. After step S10, that is, after the system parameters in the heat pump air conditioning thermal management system of the vehicle are acquired and the ambient temperature of the vehicle is acquired, the method further includes the following steps:

[0115] ​S41: When the ambient temperature is less than the first preset ambient temperature, and the passenger cabin temperature rising instruction is received, and the system waste heat meets the preset waste heat condition, the heat pump air conditioning thermal management system is controlled to enter the double-condenser single-evaporator waste heat heating mode.

[0116] S42: When the ambient temperature is less than the first preset ambient temperature, and the passenger cabin temperature rising instruction is received, and the system waste heat does not meet the preset waste heat condition, the heat pump air conditioning thermal management system is controlled to enter the double-condenser double-evaporator waste heat heating mode.

[0117] In the embodiment, the system parameters of the heat pump air conditioning thermal management system further include system waste heat, that is, the waste heat generated by the second main circuit of the heat pump air conditioning thermal management system.

[0118] Specifically, after determining whether the ambient temperature is less than the first preset ambient temperature, if the ambient temperature is less than the first preset ambient temperature, it is determined whether the passenger cabin temperature rising instruction is received to determine whether there is a passenger cabin temperature rising demand, and it is determined whether the system waste heat meets the preset waste heat condition, and different heating modes are implemented according to different system waste heat conditions.

[0119] After determining whether the passenger cabin temperature rising instruction is received and determining whether the system waste heat meets the preset waste heat condition, if the passenger cabin temperature rising instruction is received and the system waste heat meets the preset waste heat condition, it indicates that there is a passenger cabin temperature rising demand, and the waste heat in the heat pump air conditioning thermal management system is sufficient, that is, the vehicle waste heat is sufficient, at this time, the heat pump air conditioning thermal management system is controlled to enter the double-condenser single-evaporator waste heat heating mode, the vehicle waste heat is absorbed by the cooler to implement the heating and heating of the passenger cabin, and the system energy consumption is reduced, thereby reducing the vehicle energy consumption. In the double-condenser single-evaporator waste heat heating mode, the control of each element of the heat pump air conditioning thermal management system is as described above, the refrigerant flow path of the double-condenser single-evaporator waste heat heating mode is as shown in FIG. 6, and details are not described herein again. Figure 7

[0120] After determining whether the passenger cabin temperature rising instruction is received and determining whether the system waste heat meets the preset waste heat condition, if the passenger cabin temperature rising instruction is received and the system waste heat does not meet the preset waste heat condition, it indicates that there is a passenger cabin temperature rising demand, but the waste heat of the heat pump air conditioning thermal management system is insufficient, that is, the vehicle waste heat is insufficient, at this time, the heat pump air conditioning thermal management system is controlled to enter the double-condenser double-evaporator waste heat heating mode, the ambient heat and the vehicle waste heat are absorbed by the outdoor heat exchanger and the cooler to implement the heating and heating of the passenger cabin. In the double-condenser double-evaporator waste heat heating mode, the control of each element of the heat pump air conditioning thermal management system is as described above, the refrigerant flow path of the double-condenser double-evaporator waste heat heating mode is as shown in FIG. 7, and details are not described herein again. Figure 8

[0121] ​​In this embodiment, after obtaining the system parameters in the heat pump air conditioning thermal management system in the vehicle and obtaining the ambient temperature in which the vehicle is located, when the ambient temperature is less than a first preset ambient temperature, a passenger compartment temperature rising instruction is received, and system waste heat meets a preset waste heat condition, the heat pump air conditioning thermal management system is controlled to enter a double-condenser single-evaporator waste heat heating mode; when the ambient temperature is less than the first preset ambient temperature, the passenger compartment temperature rising instruction is received, and the system waste heat does not meet the preset waste heat condition, the heat pump air conditioning thermal management system is controlled to enter a double-condenser double-evaporator waste heat heating mode, thereby increasing the control scene of the heat pump air conditioning thermal management system, heating and rising the temperature of the passenger compartment by using the vehicle waste heat, saving the energy consumption of the whole vehicle, and improving the cruising range of the electric vehicle.

[0122] In an embodiment, after step S10, that is, after obtaining the ambient temperature in which the vehicle is located, the method further includes the following steps:

[0123] S51: When the ambient temperature is greater than a second preset ambient temperature and a passenger compartment temperature falling instruction is received, the heat pump air conditioning thermal management system is controlled to enter a passenger compartment refrigeration mode.

[0124] Specifically, it is determined whether the ambient temperature is greater than the second preset ambient temperature. If it is determined that the ambient temperature is greater than the second preset ambient temperature, it is determined that the ambient temperature is overheated. Then, it is determined whether a passenger compartment temperature falling instruction is received, so as to determine whether the passenger compartment needs to be cooled.

[0125] After determining whether the ambient temperature is greater than the second preset ambient temperature and determining whether the passenger compartment temperature falling instruction is received, if the ambient temperature is greater than the second preset ambient temperature and the passenger compartment temperature falling instruction is received, it is indicated that the ambient temperature is overheated and the passenger compartment needs to be cooled. At this time, the heat pump air conditioning thermal management system is controlled to enter the passenger compartment refrigeration mode, so as to cool and lower the temperature of the passenger compartment by the indoor heat exchanger. In the passenger compartment refrigeration mode, the control of each element of the heat pump air conditioning thermal management system is as described above, and the refrigerant flow path in the passenger compartment refrigeration mode is as shown in FIG. 6, which will not be described herein again. Figure 2

[0126] In this embodiment, after obtaining the ambient temperature in which the vehicle is located, when the ambient temperature is greater than the second preset ambient temperature and a passenger compartment temperature falling instruction is received, the heat pump air conditioning thermal management system is controlled to enter the passenger compartment refrigeration mode, thereby further increasing the control scene of the system and providing a basis for the thermal management of the passenger compartment.

[0127] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution. The execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0128] ​In an embodiment, a heat pump air conditioning thermal management system control device is provided, which corresponds to the heat pump air conditioning thermal management system control method in the above embodiment. As shown in the figure, the heat pump air conditioning thermal management system control device comprises an acquisition module 101 and a control module 102. The functions of each module are described in detail as follows: Figure 10

[0129] The acquisition module 101 is configured to acquire system parameters in the heat pump air conditioning thermal management system in the vehicle and acquire an ambient temperature in which the vehicle is located. The heat pump air conditioning thermal management system is the heat pump air conditioning thermal management system described above, and the system parameters include system pressure.

[0130] The control module 102 is configured to control the heat pump air conditioning thermal management system according to the instruction receiving condition, the ambient temperature, and the system pressure.

[0131] Further, the control module 102 is specifically configured to:

[0132] When the ambient temperature is less than a first preset ambient temperature, a passenger compartment temperature raising instruction is received, and the system pressure does not satisfy a preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter a single-condenser single-evaporator heating mode.

[0133] When the ambient temperature is less than the first preset ambient temperature, the passenger compartment temperature raising instruction is received, and the system pressure satisfies the preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter a double-condenser single-evaporator heating mode.

[0134] Further, the system parameters further include a power battery temperature. After the system parameters in the heat pump air conditioning thermal management system in the vehicle are acquired, the control module 102 is further specifically configured to:

[0135] When the power battery temperature is greater than a preset battery temperature and a passenger compartment temperature lowering instruction is not received, the heat pump air conditioning thermal management system is controlled to enter a power battery refrigeration mode.

[0136] When the power battery temperature is greater than the preset battery temperature and the passenger compartment temperature lowering instruction is received, the heat pump air conditioning thermal management system is controlled to enter a single-condenser double-evaporator refrigeration mode.

[0137] Further, the system parameters further include system waste heat. After the system parameters in the heat pump air conditioning thermal management system in the vehicle are acquired and the ambient temperature in which the vehicle is located is acquired, the control module 102 is further specifically configured to:

[0138] When the ambient temperature is less than the first preset ambient temperature, the passenger compartment temperature raising instruction is received, and the system waste heat satisfies a preset waste heat condition, the heat pump air conditioning thermal management system is controlled to enter a double-condenser single-evaporator waste heat heating mode.

[0139] ​When the ambient temperature is less than the first preset ambient temperature, and the passenger cabin temperature rising instruction is received, and the system waste heat does not satisfy the preset waste heat condition, the heat pump air conditioning thermal management system is controlled to enter the double-condenser double-evaporator waste heat heating mode.

[0140] Further, after obtaining the ambient temperature of the vehicle, the control module 102 is further configured to:

[0141] When the ambient temperature is greater than the second preset ambient temperature, and the passenger cabin temperature lowering instruction is received, the heat pump air conditioning thermal management system is controlled to enter the passenger cabin refrigeration mode.

[0142] For specific limitations of the heat pump air conditioning thermal management system control device, refer to the limitations of the heat pump air conditioning thermal management system control method described above, which will not be repeated here. Each module in the heat pump air conditioning thermal management system control device described above can be realized by software, hardware and their combination in whole or in part. Each module described above can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0143] In one embodiment, as shown in Figure 11 A heat pump air conditioning thermal management system control device is provided, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the heat pump air conditioning thermal management system control method when executing the computer program.

[0144] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the steps of the heat pump air conditioning thermal management system control method.

[0145] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware, and the computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. Any reference to memory, storage, database or other medium used in the embodiments provided by the present application can include non-volatile and / or volatile memory.

[0146] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above.

[0147] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A heat pump air conditioning thermal management system, characterized in that, It includes a first main circuit and a second main circuit, which exchange heat with each other through a shared cooler; The first main circuit includes an indoor heat exchanger, and a compressor, an indoor condenser, an air conditioning three-way valve, an outdoor heat exchanger, the cooler, and a gas-liquid separator connected in series to form a circuit. The inlet of the air conditioner three-way valve is connected to the outlet of the indoor condenser, and the first outlet of the air conditioner three-way valve is connected to the outdoor heat exchanger; the outlet of the outdoor heat exchanger is connected to the gas-liquid separator. The first port of the indoor heat exchanger is connected to the second outlet of the air conditioner three-way valve and the inlet of the gas-liquid separator. The second port of the indoor heat exchanger is connected to both the inlet and outlet of the outdoor heat exchanger. A one-way valve is provided at the inlet connection between the indoor heat exchanger and the outdoor heat exchanger. The second main circuit includes a power battery, a thermistor, the cooler, a third water three-way valve, a power supply device, an electric drive device, a first water three-way valve, a radiator, and a second water three-way valve, which are connected in series to form a circuit. The inlet of the third water three-way valve is connected to the cooler, the first outlet of the third water three-way valve is connected to the power supply device, and the second outlet of the third water three-way valve is connected to the power battery.

2. The heat pump air conditioning thermal management system according to claim 1, characterized in that, A first expansion valve is provided between the first outlet of the air conditioner three-way valve and the inlet of the outdoor heat exchanger; the second port of the indoor heat exchanger is connected between the air conditioner three-way valve and the first expansion valve.

3. The heat pump air conditioning thermal management system according to claim 1, characterized in that, The outdoor heat exchanger is also provided with a subcooling section. The outlet of the subcooling section is connected to the cooler and the second port of the indoor heat exchanger. The outlet of the outdoor heat exchanger is connected to the inlet of the gas-liquid separator and the inlet of the liquid storage tank. The outlet of the liquid storage tank is connected to the inlet of the subcooling section.

4. The heat pump air conditioning thermal management system according to claim 3, characterized in that, A third expansion valve is provided between the outlet of the subcooling section and the cooler; the outlet of the indoor heat exchanger is connected between the outlet of the subcooling section and the third expansion valve, and a second expansion valve is provided thereon.

5. The heat pump air conditioning thermal management system according to claim 3, characterized in that, A first solenoid valve is provided at the inlet of the liquid storage tank; a second solenoid valve is provided between the first port of the indoor heat exchanger and the inlet of the gas-liquid separator; and a third solenoid valve is provided between the outlet of the outdoor heat exchanger and the inlet of the gas-liquid separator.

6. The heat pump air conditioning thermal management system according to claim 1, characterized in that, The inlet of the first water three-way valve is connected to the electric drive device, the first outlet of the first water three-way valve is connected to the radiator, and the second outlet of the first water three-way valve is connected to the inlet of the second water three-way valve.

7. The heat pump air conditioning thermal management system according to claim 1, characterized in that, The first outlet of the second water three-way valve is connected to the power battery, and the second outlet of the second water three-way valve is connected to the power supply device.

8. The heat pump air conditioning thermal management system according to claim 1, characterized in that, The power supply device is equipped with a motor water pump at its inlet; the power battery is equipped with a battery water pump at its inlet.

9. The heat pump air conditioning thermal management system according to any one of claims 1-8, characterized in that, The second main circuit also includes an expansion tank, the outlet of which is connected to the inlet of the second water three-way valve, and the inlet of the expansion tank is simultaneously connected to the outlet of the radiator and the second outlet of the first water three-way valve.

10. A control method for a heat pump air conditioning thermal management system, characterized in that, include: The system parameters of the heat pump air conditioning thermal management system in the vehicle are obtained, and the ambient temperature of the vehicle is obtained. The heat pump air conditioning thermal management system is the heat pump air conditioning thermal management system according to any one of claims 1-9. The system parameters include system pressure. The heat pump air conditioning thermal management system is controlled based on the vehicle's command reception, the ambient temperature, and the system pressure.

11. The control method for a heat pump air conditioning thermal management system according to claim 10, characterized in that, The step of controlling the heat pump air conditioning thermal management system based on the vehicle's command reception, the ambient temperature, and the system pressure includes: When the ambient temperature is lower than the first preset ambient temperature, and a crew cabin heating command is received, and the system pressure does not meet the preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter the single condenser single evaporator heating mode. When the ambient temperature is lower than the first preset ambient temperature, and the crew cabin heating command is received, and the system pressure meets the preset pressure condition, the heat pump air conditioning thermal management system is controlled to enter the dual condenser single evaporator heating mode.

12. The control method for the heat pump air conditioning thermal management system according to claim 10, characterized in that, The system parameters also include the power battery temperature. After obtaining the system parameters from the heat pump air conditioning thermal management system in the vehicle, the method further includes: When the temperature of the power battery is higher than the preset battery temperature and no cooling command is received for the passenger compartment, the heat pump air conditioning thermal management system is controlled to enter the power battery cooling mode. When the temperature of the power battery is greater than the preset battery temperature and a cooling command for the passenger compartment is received, the heat pump air conditioning thermal management system is controlled to enter a single condenser dual evaporator cooling mode.

13. The control method for the heat pump air conditioning thermal management system according to claim 10, characterized in that, The system parameters also include system waste heat. After obtaining the system parameters of the heat pump air conditioning thermal management system in the vehicle and obtaining the ambient temperature of the vehicle, the method further includes: When the ambient temperature is lower than the first preset ambient temperature, and a crew cabin heating command is received, and the system waste heat meets the preset waste heat conditions, the heat pump air conditioning thermal management system is controlled to enter the dual condenser single evaporator waste heat heating mode. When the ambient temperature is lower than the first preset ambient temperature, and the crew cabin is given a heating command, and the system waste heat does not meet the preset waste heat conditions, the heat pump air conditioning thermal management system is controlled to enter the dual condenser dual evaporator waste heat heating mode.

14. The control method for the heat pump air conditioning thermal management system according to claim 10, characterized in that, After obtaining the ambient temperature of the vehicle, the method further includes: When the ambient temperature is greater than the second preset ambient temperature and a cooling command for the passenger cabin is received, the heat pump air conditioning thermal management system is controlled to enter the passenger cabin cooling mode.

15. A control device for a heat pump air conditioning thermal management system, characterized in that, include: The acquisition module is used to acquire system parameters in the heat pump air conditioning thermal management system in the vehicle and to acquire the ambient temperature of the vehicle. The heat pump air conditioning thermal management system is the heat pump air conditioning thermal management system according to any one of claims 1-9, and the system parameters include system pressure. The control module controls the heat pump air conditioning thermal management system based on the vehicle's command reception, the ambient temperature, and the system pressure.

16. A readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the heat pump air conditioning thermal management system control method as described in any one of claims 10 to 14.

17. A vehicle, characterized in that, Including the heat pump air conditioning thermal management system as described in any one of claims 1-9.

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