CN115923452A

CN115923452A - Vehicle air conditioner integrated with battery thermal management and control method thereof

Info

Publication number: CN115923452A
Application number: CN202310062382.XA
Authority: CN
Inventors: 李辉; 谭锋; 刘岩; 曲嘉诚
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-04-07

Abstract

The invention provides a vehicle air conditioner integrated with battery thermal management and a control method thereof, wherein the vehicle air conditioner integrated with the battery thermal management comprises the following steps: the air conditioner refrigerant loop comprises a compressor, an external heat exchanger, an internal heat exchanger, a throttling device and an intermediate heat exchanger, wherein a battery is arranged on the battery heat exchange pipeline, a motor is arranged on the motor heat exchange pipeline, the battery heat exchange pipeline can be in heat exchange connection with the intermediate heat exchanger, and the motor heat exchange pipeline can also be in heat exchange connection with the intermediate heat exchanger. According to the invention, the battery, the motor thermal management system and the pure electric passenger car in-car air conditioning system can be integrated together, the heat of the passenger compartment air conditioner, the battery and the motor can be managed in a centralized manner, the energy utilization rate of the passenger car battery is improved, and the structure is compact.

Description

Vehicle air conditioner integrated with battery thermal management and control method thereof

Technical Field

The invention relates to the technical field of air conditioners, in particular to a vehicle air conditioner integrated with battery thermal management and a control method thereof.

Background

With the requirements of global environmental protection and low carbon, new energy is required to be developed in the future of the passenger car industry, the national policy is continuously adjusted with the development of new energy passenger cars, and the new subsidy policy requires the new energy passenger cars to develop to the technical requirements of high endurance mileage, low electric energy consumption rate, high battery energy density and the like. Along with the improvement of new forms of energy passenger train battery capacity and battery energy density and the requirement that the battery charges soon, battery tradition forced air cooling mode can't satisfy the battery heat dissipation requirement, needs adopt the liquid cooling mode to cool off new forms of energy passenger train battery, promotes battery efficiency and life-span.

In the prior art, in order to improve the efficiency and the service life of the battery, the product mainly adopts an independent battery heat management system to cool the battery at the present stage, and simultaneously adopts an independent heat pump air conditioning system to cool and heat the whole vehicle.

Patent No. cn201821499806.X discloses an integrated battery thermal management system that adopts electronic expansion valve, but this technical scheme only can satisfy the battery cooling demand when filling soon and driving a vehicle, but to winter, a very common situation is, the battery needs the cooling, and the air conditioner needs the heating, and two demands are opposite, can only satisfy the cooling demand of battery, and the air conditioner can not heat, can only heat through increasing the PTC heater on air conditioner or whole car, and this scheme efficiency is low, and whole car continuation of the journey mileage is shorter.

The vehicle air conditioner integrating battery thermal management and the control method thereof are researched and designed because the vehicle air conditioner in the prior art needs to respectively exchange heat for the motor and the battery and is provided with different heat exchangers, so that the technical problems of volume increase, incompact structure and the like caused by the additional arrangement of the heat exchangers are solved.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the volume is increased and the structure is not compact due to the fact that the heat exchanger is additionally arranged because the vehicle air conditioner in the prior art needs to respectively exchange heat for the motor and the battery and different heat exchangers are arranged, so that the vehicle air conditioner integrating the battery thermal management and the control method thereof are provided.

In order to solve the above problems, the present invention provides a vehicle air conditioner integrated with battery thermal management, comprising:

the air conditioner refrigerant loop comprises a compressor, an external heat exchanger, an internal heat exchanger, a throttling device and an intermediate heat exchanger, wherein a battery is arranged on the battery heat exchange pipeline, a motor is arranged on the motor heat exchange pipeline, the battery heat exchange pipeline can be in heat exchange connection with the intermediate heat exchanger, and the motor heat exchange pipeline can also be in heat exchange connection with the intermediate heat exchanger.

In some embodiments, when the battery needs to be cooled and the interior of the vehicle needs to be cooled, the interior heat exchanger is controlled to be refrigerated, and the intermediate heat exchanger is arranged in parallel with the interior heat exchanger;

when the battery needs to be cooled and the interior of the vehicle needs to be heated, the interior heat exchanger is controlled to be heated, and the intermediate heat exchanger is arranged in parallel with the exterior heat exchanger;

when the battery needs to be heated and the motor needs to be cooled, the battery heat exchange pipeline is controlled to be communicated with the motor heat exchange pipeline, and the intermediate heat exchanger does not exchange heat with the air conditioner refrigerant loop;

when the battery and the motor both need to be cooled and the interior of the vehicle needs to be cooled, the heat exchanger in the vehicle is controlled to be refrigerated, the intermediate heat exchanger is connected with the heat exchanger in the vehicle in parallel, and the battery heat exchange pipeline is controlled to be communicated with the motor heat exchange pipeline;

when the battery and the motor both need to be cooled and the interior of the vehicle needs to be heated, the heat exchanger in the vehicle is controlled to be heated, the intermediate heat exchanger and the heat exchanger outside the vehicle are arranged in parallel, and the battery heat exchange pipeline is controlled to be communicated with the motor heat exchange pipeline.

In some embodiments, the air conditioning refrigerant circuit further comprises a first four-way reversing valve, a three-way valve, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline, one end of the first pipeline is communicated with the D end of the first four-way reversing valve, the other end of the first pipeline is communicated with one end of the second pipeline, the exterior heat exchanger is arranged on the first pipeline, one end of the third pipeline is communicated with the other end of the first pipeline, the other end of the third pipeline is communicated with the second end of the three-way valve, and the intermediate heat exchanger is arranged on the third pipeline; one end of the fourth pipeline is communicated with the S end of the first four-way reversing valve, the other end of the fourth pipeline is communicated with the third end of the three-way valve, one end of the fifth pipeline is communicated with the E end of the first four-way reversing valve, the other end of the fifth pipeline is communicated with the first end of the three-way valve, the other end of the second pipeline is communicated with the fourth pipeline, and the in-vehicle heat exchanger is arranged on the second pipeline.

In some embodiments, the discharge end of the compressor communicates with the C end of the first four-way reversing valve through a sixth pipeline, the suction end of the compressor is connected with a gas-liquid separator, the gas-liquid separator communicates with the fifth pipeline through a seventh pipeline, and the first four-way reversing valve has a first communication mode: c end and D end intercommunication, E end and S end intercommunication simultaneously to and the second intercommunication mode: the end C is communicated with the end S, the end D is communicated with the end E, and the first four-way reversing valve can be switched between a first communication mode and a second communication mode; the three-way valve is switchable between a mode in which the first end and the second end communicate and a mode in which the second end and the third end communicate.

In some embodiments, the throttling device comprises a first electronic expansion valve disposed on the second line and a second electronic expansion valve disposed on the third line.

In some embodiments, the intermediate heat exchanger is partially disposed on the third pipeline and partially disposed on the battery heat exchange pipeline, so that the battery heat exchange pipeline can exchange heat with a refrigerant in the third pipeline at the intermediate heat exchanger; the motor heat exchange pipeline can be switched between communication and non-communication with the battery heat exchange pipeline, so that the motor heat exchange pipeline is in heat exchange connection with the intermediate heat exchanger through the battery heat exchange pipeline.

In some embodiments, the four-way reversing valve further comprises a fourth four-way reversing valve, the fourth four-way reversing valve comprises a fourth end, a sixth end, a seventh end and an eighth end, the fourth end is communicated with one end of the battery heat exchange pipeline, the eighth end is communicated with the other end of the battery heat exchange pipeline, the sixth end is communicated with one end of the motor heat exchange pipeline, the seventh end is communicated with the other end of the motor heat exchange pipeline, and the fourth four-way reversing valve has a fourth communication mode: the fifth end is in communication with the sixth end, while the seventh end is in communication with the eighth end; and a fourth communication mode: the fifth end is in communication with the eighth end, while the seventh end is in communication with the sixth end.

In some embodiments, when the battery needs to be heated by using the heat of the motor, the second four-way reversing valve is controlled to execute the third communication mode, so that the motor heat exchange pipeline is communicated with the battery heat exchange pipeline, and the intermediate heat exchanger does not exchange heat;

when the battery and the motor both need to be cooled, the second four-way reversing valve is controlled to execute the third communication mode, the motor heat exchange pipeline is communicated with the battery heat exchange pipeline, and at the moment, the intermediate heat exchanger exchanges heat.

In some embodiments, a battery water pump is further arranged on the battery heat exchange pipeline, a motor water pump and a motor controller are further arranged on the motor heat exchange pipeline, and the vehicle air conditioner further comprises an expansion water tank which is communicated with the motor heat exchange pipeline so as to supply water to the motor heat exchange pipeline.

The invention also provides a control method of the vehicle air conditioner integrated with the battery thermal management, which comprises the following steps:

a judging step, namely judging which specific operation mode of a vehicle air conditioner is in a passenger compartment cooling mode, a passenger compartment heating mode, a battery + motor self-circulation mode, a motor heating battery mode, a battery cooling mode, a battery heating mode, a passenger compartment cooling + battery cooling mode, a passenger compartment heating + battery heat recovery mode, a passenger compartment cooling + battery cooling + motor cooling mode and a passenger compartment heating + battery heating + motor heat recovery mode;

and controlling whether the heat exchanger in the vehicle is used for refrigerating or heating, whether the intermediate heat exchanger is used for operating, whether a battery heat exchange pipeline is connected and whether a motor heat exchange pipeline is connected according to the operation mode of the vehicle air conditioner.

In some embodiments, in the controlling step, when the operation mode is a passenger compartment cooling mode, the compressor is controlled to be turned on, the vehicle interior heat exchanger cools, and the intermediate heat exchanger does not exchange heat;

when the operation mode is a passenger compartment heating mode, controlling the compressor to be opened, heating the in-vehicle heat exchanger, and not exchanging heat by the intermediate heat exchanger;

when the operation mode is a battery + motor self-circulation mode, the compressor is controlled to be closed, the intermediate heat exchanger does not exchange heat, the battery heat exchange pipeline is not communicated with the motor heat exchange pipeline, and the battery heat exchange pipeline and the motor heat exchange pipeline operate respectively;

when the operation mode is a motor heating battery mode, the compressor is controlled to be closed, the intermediate heat exchanger does not exchange heat, the battery heat exchange pipeline is communicated with the motor heat exchange pipeline to form a loop, and the battery is heated through the heat of the motor;

when the operation mode is a battery cooling mode, the compressor is controlled to be opened, the heat exchanger in the vehicle does not exchange heat, the heat exchanger outside the vehicle heats, the intermediate heat exchanger exchanges heat, the battery heat exchange pipeline is connected to operate, and the motor heat exchange pipeline is disconnected;

when the operation mode is a battery heating mode, the compressor is controlled to be started, the heat exchanger in the vehicle does not exchange heat, the heat exchanger outside the vehicle carries out refrigeration, the intermediate heat exchanger carries out heat exchange, the battery heat exchange pipeline is connected for operation, and the motor heat exchange pipeline is disconnected;

when the operation mode is a passenger compartment refrigeration and battery cooling mode, the compressor is controlled to be started, the heat exchanger in the vehicle is used for refrigerating, the intermediate heat exchanger is connected with the heat exchanger in the vehicle in parallel and exchanges heat, the battery heat exchange pipeline is connected for operation, and the motor heat exchange pipeline is disconnected;

when the operation mode is a passenger compartment heating and battery heat recovery mode, the compressor is controlled to be started, the heat exchanger in the vehicle heats, the heat exchanger outside the vehicle refrigerates, the intermediate heat exchanger is connected with the heat exchanger outside the vehicle in parallel and exchanges heat, the battery heat exchange pipeline is connected for operation, and the motor heat exchange pipeline is disconnected;

when the operation mode is a passenger compartment refrigeration mode, a battery cooling mode and a motor cooling mode, the compressor is controlled to be started, the heat exchanger in the vehicle is used for refrigerating, the intermediate heat exchanger is connected with the heat exchanger in the vehicle in parallel and exchanges heat, the battery heat exchange pipeline is communicated for operation, and the motor heat exchange pipeline is communicated with the battery heat exchange pipeline;

when the operation mode is a passenger compartment heating mode, a battery heat recovery mode and a motor heat recovery mode, the compressor is controlled to be opened, the heat exchanger in the vehicle heats, the heat exchanger outside the vehicle refrigerates, the intermediate heat exchanger is connected with the heat exchanger outside the vehicle in parallel and exchanges heat, the battery heat exchange pipeline is communicated and operated, and the motor heat exchange pipeline is communicated with the battery heat exchange pipeline;

when the operation mode is a passenger compartment heating mode, a battery heating mode and a motor heat recovery mode, the compressor is controlled to be opened, the heat exchanger in the vehicle heats, the heat exchanger outside the vehicle refrigerates, the intermediate heat exchanger is connected with the heat exchanger in the vehicle in parallel and exchanges heat, the battery heat exchange pipeline is communicated and operated, and the motor heat exchange pipeline is communicated with the battery heat exchange pipeline.

In some embodiments, when a first four-way reversing valve, a three-way valve, and a second four-way reversing valve, a first electronic expansion valve, and a second electronic expansion valve are included together, and the first four-way reversing valve includes a C-port, a D-port, an E-port, and an S-port, the three-way valve includes a first port, a second port, and a third port, and the second four-way reversing valve includes a fifth port, a sixth port, a seventh port, and an eighth port:

in the control step, when the running mode is a passenger compartment refrigerating mode, the C end and the D end of the first four-way reversing valve are controlled to be communicated, the E end and the S end are controlled to be communicated, and the second electronic expansion valve is disconnected;

when the operation mode is a passenger compartment heating mode, controlling the end C of the first four-way reversing valve to be communicated with the end S, controlling the end E of the first four-way reversing valve to be communicated with the end D, and disconnecting the second electronic expansion valve;

when the running mode is a battery + motor self-circulation mode, controlling the fifth end of the second four-way reversing valve to be communicated with the eighth end, and controlling the sixth end to be communicated with the seventh end;

when the running mode is a motor heating battery mode, controlling the fifth end of the second four-way reversing valve to be communicated with the sixth end, and controlling the eighth end of the second four-way reversing valve to be communicated with the seventh end;

when the operation mode is a battery cooling mode, controlling a C end and a D end of the first four-way reversing valve to be communicated, controlling an E end and an S end to be communicated, controlling the second electronic expansion valve to be communicated, controlling the first electronic expansion valve to be closed, controlling the first end and the second end of the three-way valve to be communicated, controlling the fifth end and the eighth end of the second four-way reversing valve to be communicated, and controlling the sixth end and the seventh end to be communicated;

when the operation mode is a battery heating mode, controlling a C end and an S end of the first four-way reversing valve to be communicated, controlling an E end and a D end to be communicated, controlling the second electronic expansion valve to be communicated, controlling the first electronic expansion valve to be closed, controlling the third end and the second end of the three-way valve to be communicated, controlling the fifth end and the eighth end of the second four-way reversing valve to be communicated, and controlling the sixth end and the seventh end to be communicated;

when the operation mode is a passenger compartment cooling + battery cooling mode, controlling a C end of the first four-way reversing valve to be communicated with a D end, controlling an E end of the first four-way reversing valve to be communicated with an S end, controlling a first electronic expansion valve and a second electronic expansion valve to be communicated, controlling a first end of the three-way valve to be communicated with a second end, controlling a fifth end of the second four-way reversing valve to be communicated with an eighth end of the second four-way reversing valve, and controlling a sixth end of the second four-way reversing valve to be communicated with a seventh end of the second four-way reversing valve;

when the operation mode is a passenger compartment heating and battery heat recovery mode, controlling a C end and an S end of the first four-way reversing valve to be communicated, an E end and a D end to be communicated, wherein the first electronic expansion valve and the second electronic expansion valve are both communicated, the first end and the second end of the three-way valve are communicated, the fifth end and the eighth end of the second four-way reversing valve are communicated, and the sixth end and the seventh end are communicated;

when the operation mode is a passenger compartment refrigeration mode, a battery cooling mode and a motor cooling mode, controlling a C end and a D end of the first four-way reversing valve to be communicated, controlling an E end and an S end to be communicated, controlling the first electronic expansion valve and the second electronic expansion valve to be communicated, controlling the first end and the second end of the three-way valve to be communicated, controlling the fifth end and the sixth end of the second four-way reversing valve to be communicated, and controlling the eighth end and the seventh end to be communicated;

when the operation mode is a passenger compartment heating, battery heat recovery and motor heat recovery mode, controlling a C end of the first four-way reversing valve to be communicated with an S end, an E end of the first four-way reversing valve to be communicated with a D end, both the first electronic expansion valve and the second electronic expansion valve to be communicated, the first end of the three-way valve to be communicated with the second end, the fifth end of the second four-way reversing valve to be communicated with the sixth end, and the eighth end of the second four-way reversing valve to be communicated with the seventh end;

when the operation mode is a passenger compartment heating mode, a battery heating mode and a motor heat recovery mode, the C end of the first four-way reversing valve is controlled to be communicated with the S end, the E end of the first four-way reversing valve is controlled to be communicated with the D end, the first electronic expansion valve and the second electronic expansion valve are both communicated, the third end of the three-way valve is communicated with the second end, the fifth end of the second four-way reversing valve is communicated with the sixth end, and the eighth end of the second four-way reversing valve is communicated with the seventh end.

In some embodiments, the method further comprises a detection step of detecting the battery temperature TC and the motor temperature TD;

the judging step is to judge the relation between TC and a first preset temperature T1 and a second preset temperature T2, wherein T2 is more than T1, and judge the relation between the motor temperature TD and the first preset temperature T1 and a third preset temperature T3, and T3 is more than T1;

the control step is that when TC is less than or equal to T1 and TD is less than or equal to T1, the battery heating mode is controlled to be executed; when TC is less than or equal to T1 and TD is more than T1, controlling to execute a battery heating and motor heat recovery mode; when T1 is more than TC and less than T2 and TD is less than T3, controlling to execute a battery + motor self-circulation mode; when T1 is more than TC and less than T2 and TD is more than or equal to T3, controlling to execute a motor cooling mode; when TC is larger than or equal to T2 and TD is smaller than T3, controlling to execute a battery cooling mode; and when TC is larger than or equal to T2 and TD is larger than or equal to T3, controlling to execute a battery + motor cooling mode.

The vehicle air conditioner integrated with battery thermal management and the control method thereof provided by the invention have the following beneficial effects:

according to the air conditioner, the air conditioner refrigerant loop comprises the intermediate heat exchanger, the battery heat exchange pipeline and the motor heat exchange pipeline are utilized, the battery heat exchange pipeline can be in heat exchange connection with the intermediate heat exchanger, the motor and the battery can be subjected to heat exchange through the intermediate heat exchanger so as to cool and heat the battery and cool the motor, common heat management of the battery and the motor can be effectively realized through the intermediate heat exchanger, the cold and heat requirements of the battery and the motor are met, the arrangement of one heat exchanger is effectively reduced, the size is reduced, and the structure is more compact; according to the invention, the intermediate heat exchanger and the electronic expansion valve are added on the original pure electric bus air conditioning system, and the battery, the motor heat management system and the pure electric bus in-vehicle air conditioning system are integrated together, so that the heat of the air conditioner, the battery and the motor in the passenger compartment can be managed in a centralized manner, and the energy utilization rate of the bus battery is improved. Through structural layout optimal design, the added heat management system and the air conditioning system in the pure electric passenger car are integrated together, so that the volume of the vehicle air conditioner is more compact.

Drawings

Fig. 1 is a view showing an external appearance structure of an air conditioner for a vehicle according to the present invention;

fig. 2 is an internal structure view of the air conditioner for a vehicle according to the present invention;

fig. 3 is a system configuration diagram of an air conditioner for a vehicle according to the present invention;

FIG. 4 is an operational view of the thermal management system of an embodiment of the present invention in a passenger compartment cooling mode;

FIG. 5 is an operational view of the thermal management system of an embodiment of the present invention in a passenger compartment heating mode;

FIG. 6 is a diagram of the operation of the thermal management system of an embodiment of the present invention in a battery + motor self-cycling mode;

FIG. 7 is a diagram of the operation of the thermal management system of an embodiment of the present invention in the electric motor heating battery mode;

FIG. 8 is a diagram illustrating operation of the thermal management system of an embodiment of the present invention in a battery cooling mode;

FIG. 9 is a diagram illustrating operation of a thermal management system in a battery heating mode in accordance with an embodiment of the present invention

FIG. 10 is a diagram illustrating operation of the thermal management system of an embodiment of the present invention in a passenger compartment cooling + battery cooling mode

FIG. 11 is a diagram of the operation of the thermal management system of an embodiment of the present invention in a passenger compartment heating + battery heat recovery mode;

FIG. 12 is a diagram illustrating operation of the thermal management system of an embodiment of the present invention in passenger compartment cooling + battery cooling + electric machine cooling modes;

FIG. 13 is an operational view of a thermal management system according to an embodiment of the present invention in a passenger compartment heating + battery heat recovery + electric machine heat recovery mode

Fig. 14 is an operational view of the thermal management system of an embodiment of the present invention in a passenger compartment heating + battery heating + electric machine heat recovery mode.

The reference numbers are given as:

1. an air conditioner condensation cavity outer cover; 2. an outer cover of the air-conditioning evaporation cavity; 3. an air conditioning housing; 4. a condensing fan; 5. an electrical control component; 6. a heat exchanger inside the vehicle; 7. an exterior heat exchanger; 8. a compressor; 9. an intermediate heat exchanger; 10. a first electronic expansion valve; 11. a second electronic expansion valve; 12. a filter; 13. a three-way valve; 131. a first end; 132. a second end; 133. a third end; 14. a first four-way reversing valve; C. a C terminal; D. a D end; E. an E end; s, S end; 15. an evaporation fan; 16. a gas-liquid separator; 17. a battery; 18. an expansion tank; 19. a battery water pump; 20. a second four-way reversing valve; 201. a fifth end; 202. a sixth terminal; 203. a seventh terminal; 204. an eighth end; 21. a motor water pump; 22. a motor; 23. a motor controller;

101. a first pipeline; 102. a second pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. a fifth pipeline; 106. a sixth pipeline; 107. a seventh pipeline; 301. a battery heat exchange pipeline; 302. the motor heat exchange pipeline.

Detailed Description

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 14, the present invention also provides a vehicle air conditioner integrated with battery thermal management, comprising:

air conditioner refrigerant return circuit, battery heat exchange pipeline 301 and motor heat exchange pipeline 302, the air conditioner refrigerant return circuit includes compressor 8, outer heat exchanger 7, heat exchanger 6 in the car, throttling arrangement and intermediate heat exchanger 9, be provided with battery 17 on the battery heat exchange pipeline 301, be provided with motor 22 on the motor heat exchange pipeline 302, battery heat exchange pipeline 301 can with intermediate heat exchanger 9 heat transfer is connected, motor heat exchange pipeline 302 also can with intermediate heat exchanger 9 heat transfer is connected.

The invention discloses an integrated battery heat management passenger car air conditioner, which integrates an air conditioning system in a pure electric passenger car and a battery heat management system. Because the system shares part of refrigeration components (an air conditioner shell, a compressor, a condenser and an electric control system), the cost and the weight of the whole vehicle heat management can be effectively reduced.

As shown in fig. 1-3, the overhead air conditioner is arranged at the top of the passenger car to arrange functional components, the external heat exchangers 7 are arranged at two sides of the front end of the overhead air conditioner, and the middle position of the external heat exchanger 7 is provided with the condensing fan 4 for heat exchange; the heat exchanger 6 in the vehicle is arranged in the middle of the rear end of the overhead air conditioner, and the evaporating fans 15 are arranged on two sides of the heat exchanger 6 in the vehicle for heat exchange and air supply. An air conditioner pipeline cavity and an electric control cavity are arranged in the middle of the overhead air conditioner, the air conditioner pipeline cavity and the electric control component cavity are separated by a partition plate of the air conditioner shell 3, condensate water and water vapor on the pipeline cavity are prevented from entering the air conditioner electric control cavity, and other system components such as the compressor 8, the gas-liquid separator 16, the middle heat exchanger 9 and the first four-way reversing valve 14 are integrally arranged in the pipeline cavity of the overhead air conditioner. And the electric control component 5 provides required power supply and control for the air conditioner and heat management integrated system. (the front end of the invention refers to the direction close to the head of the bus, and the rear end refers to the direction close to the tail of the bus)

As shown in fig. 3, the system comprises a compressor 8, an exterior heat exchanger 7, an interior heat exchanger 6, a first four-way reversing valve 14, a gas-liquid separator 16, an intermediate heat exchanger 9, an electric control component 5, a first electronic expansion valve 10, a second electronic expansion valve 11, a filter 12, a three-way valve 13, a battery water circuit cooling system and a motor water circuit cooling system; the battery cooling system comprises a battery 17, an intermediate heat exchanger 9, a battery water pump 19, a second four-way reversing valve 20 and a water path connecting pipe, and the motor cooling system comprises an expansion water tank 18, a motor 22, a motor controller 23, a motor water pump 21, the second four-way reversing valve 20 and the water path connecting pipe. The battery cooling system and the motor waterway cooling system are connected through a second four-way reversing valve 20, the expansion water tank 18 is connected with the motor water pump 21 through a waterway connecting pipe, the expansion water tank 18 supplies cooling liquid and exhausts the cooling liquid for the battery cooling system, two ends of the battery water pump 19 are connected with two ends of the battery side of the middle heat exchanger 9 through waterway pipelines, the battery 17 is laid on the waterway pipelines, and the cooling liquid cools the battery after being cooled on the middle heat exchanger 9; the functional components are all integrated on the bus overhead air conditioner except a bus battery water path cooling system and a motor water path cooling system.

In some embodiments, when the battery 17 needs to be cooled and the interior needs to be cooled, the interior heat exchanger 6 is controlled to cool, and the intermediate heat exchanger 9 is arranged in parallel with the interior heat exchanger 6;

when the battery 17 needs to be cooled and the interior needs to be heated, the interior heat exchanger 6 is controlled to be heated, and the intermediate heat exchanger 9 is provided in parallel with the exterior heat exchanger 7;

when the battery 17 needs to be heated and the motor 22 needs to be cooled, the battery heat exchange pipeline 301 is controlled to be communicated with the motor heat exchange pipeline 302, and the intermediate heat exchanger 9 does not exchange heat with the air-conditioning refrigerant loop;

when the battery 17 and the motor 22 both need to be cooled and the interior of the vehicle needs to be cooled, the interior heat exchanger 6 is controlled to be refrigerated, the intermediate heat exchanger 9 is arranged in parallel with the interior heat exchanger 6, and the battery heat exchange pipeline 301 is controlled to be communicated with the motor heat exchange pipeline 302;

when the battery 17 and the motor 22 both need to be cooled and the interior of the vehicle needs to be heated, the heat exchanger 6 in the vehicle is controlled to heat, the intermediate heat exchanger 9 and the heat exchanger 7 outside the vehicle are arranged in parallel, and the battery heat exchange pipeline 301 is controlled to be communicated with the motor heat exchange pipeline 302.

The battery and the motor are in the optimal structure and control mode when cooling and heating are respectively needed, the temperature of the battery and the motor can be effectively kept in a safe range when heating or cooling is needed by controlling the linkage operation or closing of the intermediate heat exchanger in the air-conditioning refrigeration loop, the heat exchange pipeline of the battery and the motor loop, the service life of the battery and the motor can be ensured, the heat management effect can be effectively achieved, energy (such as motor heat and the like) can be effectively utilized, and the energy efficiency of the system can be improved.

The invention integrates a battery thermal management system and an air conditioning system in a pure electric passenger car. By adding the electronic expansion valve and the intermediate heat exchanger, the cooling and heating functions of the battery and the heat dissipation function of the motor are simultaneously met under the condition of meeting the requirements of the air conditioner for cooling and heating; meanwhile, due to the fact that the air conditioner recycles heat of the battery and the motor during heating, heat required by evaporation of a refrigerant on the low-temperature side of the heat pump is equivalently provided, and the heating capacity and the energy efficiency ratio of the air conditioner are improved.

Meanwhile, as part of refrigeration components (a compressor, a condenser, an electric control system and the like) are shared, compared with an additional independent battery heat management unit, the cost is reduced by 50%, and the weight is reduced by about 50KG. Meanwhile, the liquid cooling system component is integrated into the air conditioner, so that the installation and the maintenance are more convenient, and the labor cost is saved.

According to the passenger car air conditioner integrated with the battery thermal management, the battery, the motor thermal management system and the pure electric passenger car in-car air conditioning system are integrated, so that the heat of the passenger car air conditioner, the battery and the motor can be managed in a centralized manner, and the energy utilization rate of the passenger car battery is improved. Because part of refrigeration components (a compressor, a condenser, an electric control system and the like) are shared, the problems of cost, weight and the like of battery heat management can be effectively reduced, and the endurance mileage of the whole vehicle is improved; meanwhile, the liquid cooling system component is integrated into the air conditioner, so that the installation and maintenance are more convenient.

In some embodiments, the air conditioning refrigerant circuit further includes a first four-way selector valve 14, a three-way valve 13, a first line 101, a second line 102, a third line 103, a fourth line 104, and a fifth line 105, one end of the first line 101 communicates with the D-port D of the first four-way selector valve 14, the other end communicates with one end of the second line 102, the exterior heat exchanger 7 is disposed on the first line 101, one end of the third line 103 communicates with the other end of the first line 101, the other end of the third line 103 communicates with the second port 132 of the three-way valve 13, and the intermediate heat exchanger 9 is disposed on the third line 103; one end of the fourth pipeline 104 is communicated with the S end S of the first four-way reversing valve 14, the other end of the fourth pipeline is communicated with the third end 133 of the three-way valve 13, one end of the fifth pipeline 105 is communicated with the E end E of the first four-way reversing valve 14, the other end of the fifth pipeline is communicated with the first end 131 of the three-way valve 13, the other end of the second pipeline 102 is communicated with the fourth pipeline 104, and the in-vehicle heat exchanger 6 is arranged on the second pipeline 102.

The air conditioner refrigerant loop is in an optimal structure form, the first four-way reversing valve can control the heat exchanger in the vehicle to refrigerate or heat, the heat exchanger outside the vehicle can heat or refrigerate, so that the requirement of the cooling or heating in the vehicle is met, meanwhile, the three-way valve, a plurality of pipelines connected with the three-way valve and the intermediate heat exchanger are arranged, the intermediate heat exchanger can be connected with the heat exchanger in the vehicle in parallel or connected with the heat exchanger outside the vehicle in parallel by controlling the three-way valve, so that the running of various different modes such as the heating in the vehicle and the intermediate heat exchanger, the heating in the vehicle and the cooling of the intermediate heat exchanger, the cooling in the vehicle and the heating of the intermediate heat exchanger, the cooling in the vehicle and the cooling of the intermediate heat exchanger and the like can be realized, and the heat management effect of different requirements on the battery and the motor can be effectively realized.

In some embodiments, the discharge end of the compressor 8 communicates with the C-end C of the first four-way reversing valve 14 through a sixth line 106, the suction end of the compressor 8 is connected with a gas-liquid separator 16, the gas-liquid separator 16 communicates with the fifth line 105 through a seventh line 107, and the first four-way reversing valve 14 has a first communication mode: the end C is communicated with the end D, the end E is communicated with the end S, and the second communication mode is as follows: the end C is communicated with the end S, the end D is communicated with the end E, and the first four-way reversing valve 14 can be switched between the first communication mode and the second communication mode; the three-way valve 13 is switchable between a mode in which the first end 131 and the second end 132 communicate and a mode in which the second end 132 and the third end 133 communicate.

The compressor and the first four-way reversing valve are communicated through the sixth pipeline and the seventh pipeline, the compressor, the vehicle interior and vehicle exterior heat exchanger and the intermediate heat exchanger can be integrally connected into an air conditioner refrigeration circulation loop, the operation in different modes of vehicle interior heating and intermediate heat exchanger heating, vehicle interior heating and intermediate heat exchanger refrigerating, vehicle interior refrigerating and intermediate heat exchanger heating, vehicle interior refrigerating and intermediate heat exchanger refrigerating and the like is realized, and the heat management effect of different requirements on the battery and the motor is effectively realized.

As shown in fig. 3, the first four-way selector valve 14 has four ports, a port C is connected to the exhaust outlet of the compressor 8, a port D is connected to one end of the exterior heat exchanger 7, a port S is connected to one end of the interior heat exchanger 6, a port E is connected to one end of the gas-liquid separator 16, and the other end of the gas-liquid separator 16 is connected to the inlet of the compressor 8.

The other end of the heat exchanger 7 outside the vehicle is connected with one end of the heat exchanger 6 inside the vehicle through the 1 st path of the filter 12 and the first electronic expansion valve 10, the 2 nd path of the filter 12 is connected with one end of the air-conditioning side of the intermediate heat exchanger 9 through the second electronic expansion valve 11, the other end of the air-conditioning side of the intermediate heat exchanger 9 is connected with the second end 132 of the three-way valve 13, and the two ends of the battery side of the intermediate heat exchanger 9 are connected with the battery cooling system.

The three-way valve 13 has three ports, a first end 131 is connected to an E-port OF the first four-way reversing valve, a second end 132 OF the three-way valve is connected to one end OF the intermediate heat exchanger 9, a third end 133 OF the three-way valve is connected to an S-port OF the first four-way reversing valve, the three-way valve has two states, an open state (ON) is that the first end 131 is communicated with the second end 132, and a closed state (OF) is that the second end 132 is communicated with the third end 133.

In some embodiments, the throttling means comprises a first electronic expansion valve 10 arranged on the second line 102 and a second electronic expansion valve 11 arranged on the third line 103. The invention also can adjust the refrigerant flow of the pipeline where the heat exchanger in the vehicle is located through the first electronic expansion valve arranged on the second pipeline, and can adjust the refrigerant flow of the pipeline where the intermediate heat exchanger is located through the second electronic expansion valve arranged on the third pipeline.

In some embodiments, the intermediate heat exchanger 9 is partially disposed on the third pipeline 103, and partially disposed on the battery heat exchange pipeline 301, so that the battery heat exchange pipeline 301 can exchange heat with the refrigerant in the third pipeline 103 at the intermediate heat exchanger 9; the motor heat exchange pipeline 302 can be switched between communication and non-communication with the battery heat exchange pipeline 301, so that the motor heat exchange pipeline 302 is in heat exchange connection with the intermediate heat exchanger 9 through the battery heat exchange pipeline 301. The intermediate heat exchanger, the battery heat exchange pipeline and the motor pipeline are effectively connected, namely the intermediate heat exchanger exchanges heat with the battery heat exchange pipeline, the motor heat exchange pipeline and the battery heat exchange pipeline can be communicated to realize heat transfer between the battery heat exchange pipeline and the intermediate heat exchanger, the motor heat exchange pipeline and the battery heat exchange pipeline are not communicated, and the battery and the motor can be cooled or heated independently.

In some embodiments, a second four-way reversing valve 20 is further included, the second four-way reversing valve 20 includes a fifth end 201, a sixth end 202, a seventh end 203, and an eighth end 204, the fifth end 201 communicates with one end of the battery heat-exchange line, the eighth end 204 communicates with the other end of the battery heat-exchange line 301, the sixth end 202 communicates with one end of the motor heat-exchange line 302, the seventh end 203 communicates with the other end of the motor heat-exchange line 302, and the second four-way reversing valve 20 has a third communication mode: the fifth end 201 is in communication with the sixth end 202, while the seventh end 203 is in communication with the eighth end 204; and a fourth communication mode: the fifth end 201 is in communication with the eighth end 204, while the seventh end 203 is in communication with the sixth end 202.

The battery heat exchange pipeline and the motor heat exchange pipeline are effectively connected into a whole through the arrangement of the second four-way reversing valve, the battery heat exchange pipeline and the motor heat exchange pipeline are communicated in a third communication mode through the adjustment of the second four-way reversing valve, and heat transfer can be carried out between the battery heat exchange pipeline and the motor heat exchange pipeline, for example, heat in the motor is transferred to the battery, and cold energy of a refrigerant in the intermediate heat exchanger is transferred to the battery and the motor together to cool the battery and the motor together; and in the fourth communication mode, the battery heat exchange pipeline and the motor heat exchange pipeline are disconnected, so that the battery and the motor can be cooled or heated respectively.

The second four-way reversing valve 20 of the invention is provided with four interfaces, a fifth end 201 and an eighth end 204 of the second four-way reversing valve 20 are connected with a battery heat exchange pipeline 301, a sixth end 202 and a seventh end 203 of the second four-way reversing valve 20 are respectively connected with a motor heat exchange pipeline 302, the waterway four-way valve is provided with two states, the opening state (ON) is that the fifth end 201 is communicated with the eighth end 204, and the sixth end 202 is communicated with the seventh end 203; the closed state (OF) is that the fifth end 201 communicates with the sixth end 202, and the seventh end 203 communicates with the eighth end 204.

In some embodiments, when the battery needs to be heated by the heat of the motor, the second four-way reversing valve 20 is controlled to perform the third communication mode, so that the motor heat exchange pipeline 302 is communicated with the battery heat exchange pipeline 301, and the intermediate heat exchanger 9 does not exchange heat;

when both the battery and the motor need to be cooled, the second four-way reversing valve 20 is controlled to execute the third communication mode, the motor heat exchange pipeline 302 is communicated with the battery heat exchange pipeline 301, and at the moment, the intermediate heat exchanger 9 exchanges heat.

The battery heat exchange pipeline is communicated with the motor heat exchange pipeline when the heat of the motor is used for heating the battery, so that the battery is heated while the motor is cooled, the heat of the motor is effectively recovered, and the energy efficiency of a system is improved; can also communicate battery heat transfer pipeline and motor heat transfer pipeline when battery and motor all need be cooled off, the refrigerant through middle heat exchanger provides cold volume, provides cold volume to battery and motor jointly to the realization is to the cooling effect of the two.

In some embodiments, a battery water pump 19 is further disposed on the battery heat exchange pipeline 301, a motor water pump 21 and a motor controller 23 are further disposed on the motor heat exchange pipeline 302, and the vehicle air conditioner further includes an expansion water tank 18, wherein the expansion water tank 18 is communicated with the motor heat exchange pipeline 302 so as to supply water to the motor heat exchange pipeline 302.

The water pump can provide driving force for water flow movement in the battery heat exchange pipeline to exchange heat with the intermediate heat exchanger, the motor water pump can provide driving force for water flow movement in the motor heat exchange pipeline to be communicated with the battery heat exchange pipeline to realize heat exchange, and the motor controller is arranged on the motor heat exchange pipeline and can also cool the motor controller; can provide rivers in for the motor heat exchange pipeline through expansion tank, guarantee effectual heat transfer.

The invention relates to a passenger car air conditioner integrated with battery heat management, which is mainly used for a pure electric passenger car, integrates the battery heat management function under the condition of meeting the refrigeration and heating requirements of the air conditioner, meets the cooling requirement of a battery, reduces the problems of cost, weight and the like of increasing the battery heat management, and is beneficial to saving energy and reducing consumption of the whole car.

a judging step of judging which specific operation mode of a passenger compartment cooling mode, a passenger compartment heating mode, a battery + motor self-circulation mode, a motor heating battery mode, a battery cooling mode, a battery heating mode, a passenger compartment cooling + battery cooling mode, a passenger compartment heating + battery heat recovery mode, a passenger compartment cooling + battery cooling + motor cooling mode and a passenger compartment heating + battery heating + motor heat recovery mode is the operation mode of the vehicle air conditioner;

and controlling whether the heat exchanger 6 in the vehicle is used for cooling or heating, whether the intermediate heat exchanger 9 is used for operating, whether the battery heat exchange pipeline 301 is connected and whether the motor heat exchange pipeline 302 is connected according to the operation mode of the vehicle air conditioner.

The optimal control mode of the vehicle air conditioner is that the motor and the battery can exchange heat through the intermediate heat exchanger to cool and heat the battery and cool the motor, the common heat management of the battery and the motor can be effectively realized through the intermediate heat exchanger, and the cold and heat requirements of the battery and the motor are met, so that the arrangement of one heat exchanger is effectively reduced, the volume is reduced, and the structure is more compact; according to the invention, the intermediate heat exchanger and the electronic expansion valve are added on the original pure electric bus air conditioning system, and the battery, the motor heat management system and the pure electric bus in-vehicle air conditioning system are integrated together, so that the heat of the air conditioner, the battery and the motor in the passenger compartment can be managed in a centralized manner, and the energy utilization rate of the bus battery is improved. Through structural layout optimal design, the added heat management system and the air conditioning system in the pure electric passenger car are integrated together, so that the volume of the vehicle air conditioner is more compact.

In some embodiments, in the controlling step, when the operation mode is a passenger compartment cooling mode, the compressor 8 is controlled to be turned on, the interior heat exchanger 6 is cooled, and the intermediate heat exchanger 9 does not exchange heat;

when the operation mode is a passenger compartment heating mode, controlling the compressor 8 to be opened, heating the in-vehicle heat exchanger 6, and not exchanging heat with the intermediate heat exchanger 9;

when the operation mode is a battery + motor self-circulation mode, the compressor 8 is controlled to be closed, the intermediate heat exchanger 9 does not exchange heat, the battery heat exchange pipeline 301 is not communicated with the motor heat exchange pipeline 302, and the battery heat exchange pipeline 301 and the motor heat exchange pipeline 302 operate respectively;

when the operation mode is a motor battery heating mode, the compressor 8 is controlled to be closed, the intermediate heat exchanger 9 does not exchange heat, the battery heat exchange pipeline 301 is communicated with the motor heat exchange pipeline 302 to form a loop, and the battery is heated by the heat of the motor;

when the operation mode is a battery cooling mode, the compressor 8 is controlled to be started, the heat exchanger 6 in the vehicle does not exchange heat, the heat exchanger 7 outside the vehicle heats, the intermediate heat exchanger 9 exchanges heat, the battery heat exchange pipeline 301 is connected for operation, and the motor heat exchange pipeline 302 is disconnected;

when the operation mode is a battery heating mode, the compressor 8 is controlled to be opened, the heat exchanger 6 in the vehicle does not exchange heat, the heat exchanger 7 outside the vehicle carries out refrigeration, the intermediate heat exchanger 9 carries out heat exchange, the battery heat exchange pipeline 301 is connected for operation, and the motor heat exchange pipeline 302 is disconnected;

when the operation mode is a passenger compartment refrigeration + battery cooling mode, the compressor 8 is controlled to be started, the heat exchanger 6 in the vehicle is used for refrigerating, the intermediate heat exchanger 9 and the heat exchanger 6 in the vehicle are connected in parallel and exchange heat, the battery heat exchange pipeline 301 is connected for operation, and the motor heat exchange pipeline 302 is disconnected;

when the operation mode is a passenger compartment heating and battery heat recovery mode, the compressor 8 is controlled to be started, the vehicle-interior heat exchanger 6 heats, the vehicle-exterior heat exchanger 7 refrigerates, the intermediate heat exchanger 9 is connected with the vehicle-exterior heat exchanger 7 in parallel and exchanges heat, the battery heat exchange pipeline 301 is connected and operated, and the motor heat exchange pipeline 302 is disconnected;

when the operation mode is a passenger compartment refrigeration mode, a battery cooling mode and a motor cooling mode, the compressor 8 is controlled to be started, the vehicle-interior heat exchanger 6 is used for refrigerating, the intermediate heat exchanger 9 is connected with the vehicle-interior heat exchanger 6 in parallel and exchanges heat, the battery heat exchange pipeline 301 is connected for operation, and the motor heat exchange pipeline 302 is communicated with the battery heat exchange pipeline 301;

when the operation mode is a passenger compartment heating mode, a battery heat recovery mode and a motor heat recovery mode, the compressor 8 is controlled to be started, the heat exchanger 6 in the vehicle heats, the heat exchanger 7 outside the vehicle refrigerates, the intermediate heat exchanger 9 is connected with the heat exchanger 7 outside the vehicle in parallel and exchanges heat, the battery heat exchange pipeline 301 is communicated and operated, and the motor heat exchange pipeline 302 is communicated with the battery heat exchange pipeline 301;

when the operation mode is a passenger compartment heating mode, a battery heating mode and a motor heat recovery mode, the compressor 8 is controlled to be opened, the heat exchanger 6 in the vehicle heats, the heat exchanger 7 outside the vehicle refrigerates, the intermediate heat exchanger 9 is connected with the heat exchanger 6 in the vehicle in parallel and exchanges heat, the battery heat exchange pipeline 301 is communicated and operated, and the motor heat exchange pipeline 302 is communicated with the battery heat exchange pipeline 301.

The optimal control modes of the compressor, the heat exchanger in the vehicle, the heat exchanger outside the vehicle, the intermediate heat exchanger, the battery heat exchange pipeline and the motor heat exchange pipeline in different operation modes can effectively ensure that the temperatures of the battery and the motor are maintained in a safe range when heating or cooling is needed by controlling the linkage operation or closing of the intermediate heat exchanger in the air-conditioning refrigeration loop and the battery heat exchange pipeline and the motor loop, the service life of the battery and the motor is ensured, the heat management effect is effectively achieved, energy (such as motor heat and the like) can be effectively utilized, and the energy efficiency of the system is improved.

In some embodiments, when including a first four-way reversing valve 14, a three-way valve 13, a second four-way reversing valve 20, a first electronic expansion valve 10, a second electronic expansion valve 11, and the first four-way reversing valve 14 includes a C-end, a D-end, an E-end, and an S-end, the three-way valve 13 includes a first end 131, a second end 132, and a third end 133, and the second four-way reversing valve 20 includes a fifth end 201, a sixth end 202, a seventh end 203, and an eighth end 204:

in the control step, when the operation mode is a passenger compartment cooling mode, the C end C of the first four-way reversing valve 14 is controlled to be communicated with the D end D, the E end E of the first four-way reversing valve is controlled to be communicated with the S end S, and the second electronic expansion valve 11 is controlled to be disconnected;

when the operation mode is a passenger compartment heating mode, controlling the C end C of the first four-way reversing valve 14 to be communicated with the S end S, controlling the E end E to be communicated with the D end D, and disconnecting the second electronic expansion valve 11;

when the operation mode is the battery + motor self-circulation mode, the fifth end 201 of the second four-way reversing valve 20 is controlled to be communicated with the eighth end 204, and the sixth end 202 is controlled to be communicated with the seventh end 203;

when the operation mode is the motor-heating battery mode, the fifth end 201 of the second four-way reversing valve 20 is controlled to be communicated with the sixth end 202, and the eighth end 204 is controlled to be communicated with the seventh end 203;

when the operation mode is a battery cooling mode, controlling a C end C of the first four-way reversing valve 14 to be communicated with a D end D, an E end E to be communicated with an S end S, the second electronic expansion valve 11 to be switched on, the first electronic expansion valve 10 to be closed, the first end 131 of the three-way valve 13 to be communicated with the second end 132, the fifth end 201 of the second four-way reversing valve 20 to be communicated with the eighth end 204, and the sixth end 202 to be communicated with the seventh end 203;

when the operation mode is a battery heating mode, controlling a C end C of the first four-way reversing valve 14 to be communicated with an S end S, an E end E of the first four-way reversing valve to be communicated with a D end D, the second electronic expansion valve 11 to be communicated, the first electronic expansion valve 10 to be closed, the third end 133 of the three-way valve 13 to be communicated with the second end 132, the fifth end 201 of the second four-way reversing valve 20 to be communicated with the eighth end 204, and the sixth end 202 to be communicated with the seventh end 203;

when the operation mode is a passenger compartment cooling + battery cooling mode, controlling a C end C of the first four-way reversing valve 14 to be communicated with a D end D, a E end E to be communicated with an S end S, the first electronic expansion valve 10 and the second electronic expansion valve 11 to be communicated, the first end 131 of the three-way valve 13 to be communicated with the second end 132, the fifth end 201 of the second four-way reversing valve 20 to be communicated with the eighth end 204, and the sixth end 202 to be communicated with the seventh end 203;

when the operation mode is the passenger compartment heating + battery heat recovery mode, controlling the C port C of the first four-way reversing valve 14 to be communicated with the S port S, the E port E to be communicated with the D port D, the first electronic expansion valve 10 and the second electronic expansion valve 11 to be communicated, the first port 131 of the three-way valve 13 to be communicated with the second port 132, the fifth port 201 of the second four-way reversing valve 20 to be communicated with the eighth port 204, and the sixth port 202 to be communicated with the seventh port 203;

when the operation mode is a passenger compartment cooling mode, a battery cooling mode and a motor cooling mode, controlling a C end C of the first four-way reversing valve 14 to be communicated with a D end D, a E end E of the first four-way reversing valve to be communicated with an S end S, the first electronic expansion valve 10 and the second electronic expansion valve 11 to be communicated, the first end 131 of the three-way valve 13 to be communicated with the second end 132, the fifth end 201 of the second four-way reversing valve 20 to be communicated with the sixth end 202, and the eighth end 204 to be communicated with the seventh end 203;

when the operation mode is passenger compartment heating, battery heat recovery and motor heat recovery, controlling the C end C of the first four-way reversing valve 14 to be communicated with the S end S, the E end E to be communicated with the D end D, the first electronic expansion valve 10 and the second electronic expansion valve 11 to be communicated, the first end 131 of the three-way valve 13 to be communicated with the second end 132, the fifth end 201 of the second four-way reversing valve 20 to be communicated with the sixth end 202, and the eighth end 204 to be communicated with the seventh end 203;

when the operation mode is a passenger compartment heating mode, a battery heating mode and a motor heat recovery mode, the C end C of the first four-way reversing valve 14 is controlled to be communicated with the S end S, the E end E of the first four-way reversing valve is controlled to be communicated with the D end D of the first four-way reversing valve, the first electronic expansion valve 10 and the second electronic expansion valve 11 are both controlled to be communicated, the third end 133 of the three-way valve 13 is communicated with the second end 132, the fifth end 201 of the second four-way reversing valve 20 is communicated with the sixth end 202, and the eighth end 204 of the second four-way reversing valve is communicated with the seventh end 203.

The optimal control mode of the first four-way reversing valve, the first electronic expansion valve, the second electronic expansion valve, the three-way valve and the second four-way reversing valve in different operation modes can effectively ensure that the temperatures of the battery and the motor are maintained in a safe range when the motor and the battery respectively need to be heated or cooled, the service life of the motor and the battery is ensured, the heat management effect is effectively achieved, energy (such as motor heat and the like) can be effectively utilized, and the energy efficiency of the system is improved.

The optimal mode control mode according to the temperature ranges of the battery and the motor can effectively ensure that the temperatures of the battery and the motor are maintained in a safe range when the motor and the battery respectively need to be heated or cooled, the service life of the motor and the battery is ensured, the heat management effect is effectively achieved, energy (such as motor heat) can be effectively utilized, and the energy efficiency of the system is improved.

In order to ensure that the operation temperature of the battery is kept in an optimal temperature range of T1-T2, the temperature T1 is preferably set to be 10 ℃, the temperature T2 is preferably set to be 35 ℃, and when the temperature TC of the battery is less than or equal to the preset temperature T1, the battery needs to be heated; when the temperature TC of the battery is larger than or equal to T2, the battery needs to dissipate heat and cool. The optimal temperature interval of the motor operation is less than T3, the temperature T3 is preferably set to be 45 ℃, and when the temperature TD of the motor is less than the preset temperature T3, the motor does not need to be cooled and adopts natural cooling; when the motor temperature TD is larger than or equal to the preset temperature T3, the motor needs to be cooled, and an air conditioner is adopted to cool a motor water path. The battery temperature TC of the passenger car is detected at intervals of a period of time (t 0, t0 is preferably 1-2 minutes), the motor temperature is TD, the air conditioner performs heat management operation mode control according to the detected temperature, and the heat management operation mode is shown in the following table 1.

TABLE 1

When the temperature of the battery is T1-T2 and the temperature of the motor is less than T3, the battery and the motor adopt self-circulation cooling heat dissipation, and the four-way valve of the water path keeps an open state (ON). When the passenger compartment needs to be refrigerated, the first four-way reversing valve 14 is adjusted to the refrigeration mode state, the first electronic expansion valve 10 is opened, the second electronic expansion valve 11 is closed, and the thermal management system operates in the refrigerated passenger compartment refrigeration mode, as shown in fig. 4. When the passenger compartment needs to be heated, the first four-way reversing valve 14 is adjusted to the heating mode state, the first electronic expansion valve 10 is opened, the second electronic expansion valve 11 is closed, and the thermal management system operates the cooling passenger compartment heating mode, as shown in fig. 5.

When the passenger compartment has no cooling and heating requirements, and the battery and the motor do not need cooling and heat dissipation or heating, the air conditioner is in an air supply mode and a closed state, when the temperature of the battery is T1-T2 and the temperature of the motor is less than T3, the battery and the motor adopt self-circulation cooling and heat dissipation, the water path four-way valve is kept in an open state (ON), and the heat management system operates a battery and motor self-circulation mode as shown in FIG. 6. The battery water pump 19 and the motor water pump 21 can independently perform waterway circulation control, when the passenger car stops, the motor stops running, and the motor water pump 21 can be turned off to save electric energy.

When the temperature of the battery is less than or equal to T1 and the temperature of the motor is greater than T1, the battery can be heated by using the heat of the motor, and the four-way valve of the water path keeps an OFF state. The thermal management system now operates the electric motor warm battery mode as shown in fig. 7.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A vehicle air conditioner integrated with battery thermal management is characterized in that: the method comprises the following steps:

air conditioner refrigerant return circuit, battery heat exchange pipeline (301) and motor heat exchange pipeline (302), the air conditioner refrigerant return circuit includes compressor (8), outer heat exchanger (7), heat exchanger (6) in the car, throttling arrangement and middle heat exchanger (9), be provided with battery (17) on battery heat exchange pipeline (301), be provided with motor (22) on motor heat exchange pipeline (302), battery heat exchange pipeline (301) can with middle heat exchanger (9) heat transfer is connected, motor heat exchange pipeline (302) also can with middle heat exchanger (9) heat transfer is connected.

2. The integrated battery thermal management vehicular air conditioner of claim 1, wherein:

when the battery (17) needs to be cooled and the temperature in the vehicle needs to be reduced, the vehicle-mounted heat exchanger (6) is controlled to be refrigerated, and the intermediate heat exchanger (9) is arranged in parallel with the vehicle-mounted heat exchanger (6);

when the battery (17) needs to be cooled and the interior needs to be heated, the interior heat exchanger (6) is controlled to be heated, and the intermediate heat exchanger (9) is arranged in parallel with the exterior heat exchanger (7);

when the battery (17) needs to be heated and the motor (22) needs to be cooled, the battery heat exchange pipeline (301) is controlled to be communicated with the motor heat exchange pipeline (302), and the intermediate heat exchanger (9) does not exchange heat with the air-conditioning refrigerant loop;

when the battery (17) and the motor (22) both need to be cooled and the interior of the vehicle needs to be cooled, the heat exchanger (6) in the vehicle is controlled to refrigerate, the intermediate heat exchanger (9) is connected with the heat exchanger (6) in the vehicle in parallel, and the battery heat exchange pipeline (301) is controlled to be communicated with the motor heat exchange pipeline (302);

when the battery (17) and the motor (22) both need to be cooled and the interior of the vehicle needs to be heated, the heat exchanger (6) in the vehicle is controlled to heat, the intermediate heat exchanger (9) and the heat exchanger (7) outside the vehicle are arranged in parallel, and the battery heat exchange pipeline (301) is controlled to be communicated with the motor heat exchange pipeline (302).

3. The integrated battery thermal management vehicular air conditioner of claim 2, wherein:

the air-conditioning refrigerant loop further comprises a first four-way reversing valve (14), a three-way valve (13), a first pipeline (101), a second pipeline (102), a third pipeline (103), a fourth pipeline (104) and a fifth pipeline (105), one end of the first pipeline (101) is communicated with a D end (D) of the first four-way reversing valve (14), the other end of the first pipeline is communicated with one end of the second pipeline (102), the external heat exchanger (7) is arranged on the first pipeline (101), one end of the third pipeline (103) is communicated with the other end of the first pipeline (101), the other end of the third pipeline (103) is communicated with a second end (132) of the three-way valve (13), and the intermediate heat exchanger (9) is arranged on the third pipeline (103); one end of the fourth pipeline (104) is communicated with the S end (S) of the first four-way reversing valve (14), the other end of the fourth pipeline is communicated with the third end (133) of the three-way valve (13), one end of the fifth pipeline (105) is communicated with the E end (E) of the first four-way reversing valve (14), the other end of the fifth pipeline is communicated with the first end (131) of the three-way valve (13), the other end of the second pipeline (102) is communicated with the fourth pipeline (104), and the in-vehicle heat exchanger (6) is arranged on the second pipeline (102).

4. The integrated battery thermal management vehicle air conditioner of claim 3, wherein:

the discharge end of the compressor (8) is communicated with the C end (C) of the first four-way reversing valve (14) through a sixth pipeline (106), the suction end of the compressor (8) is connected with a gas-liquid separator (16), the gas-liquid separator (16) is communicated with the fifth pipeline (105) through a seventh pipeline (107), and the first four-way reversing valve (14) has a first communication mode: the end C is communicated with the end D, the end E is communicated with the end S, and the second communication mode is as follows: the end C is communicated with the end S, the end D is communicated with the end E, and the first four-way reversing valve (14) can be switched between the first communication mode and the second communication mode; the three-way valve (13) is switchable between a mode in which the first end (131) and the second end (132) communicate and a mode in which the second end (132) and the third end (133) communicate.

5. The integrated battery thermal management vehicle air conditioner of claim 4, wherein:

the throttling device comprises a first electronic expansion valve (10) arranged on the second pipeline (102) and a second electronic expansion valve (11) arranged on the third pipeline (103).

6. The integrated battery thermal management vehicle air conditioner of any of claims 3-5, wherein:

the intermediate heat exchanger (9) is partially arranged on the third pipeline (103) and partially arranged on the battery heat exchange pipeline (301), so that the battery heat exchange pipeline (301) can exchange heat with a refrigerant in the third pipeline (103) at the intermediate heat exchanger (9); the motor heat exchange pipeline (302) can be switched between communication and non-communication with the battery heat exchange pipeline (301), so that the motor heat exchange pipeline (302) is in heat exchange connection with the intermediate heat exchanger (9) through the battery heat exchange pipeline (301).

7. The integrated battery thermal management vehicle air conditioner of claim 6, wherein:

the battery heat exchange pipeline system further comprises a second four-way reversing valve (20), the second four-way reversing valve (20) comprises a fifth end (201), a sixth end (202), a seventh end (203) and an eighth end (204), the fifth end (201) is communicated with one end of the battery heat exchange pipeline (301), the eighth end (204) is communicated with the other end of the battery heat exchange pipeline (301), the sixth end (202) is communicated with one end of the motor heat exchange pipeline (302), the seventh end (203) is communicated with the other end of the motor heat exchange pipeline (302), and the second four-way reversing valve (20) has a third communication mode: said fifth end (201) being in communication with said sixth end (202), while said seventh end (203) is in communication with said eighth end (204); and a fourth communication mode: the fifth end (201) communicates with the eighth end (204), while the seventh end (203) communicates with the sixth end (202).

8. The integrated battery thermal management vehicle air conditioner of claim 7, wherein:

when the battery needs to be heated by using the heat of the motor, the second four-way reversing valve (20) is controlled to execute the third communication mode, so that the motor heat exchange pipeline (302) is communicated with the battery heat exchange pipeline (301), and the intermediate heat exchanger (9) does not exchange heat;

when the battery and the motor both need to be cooled, the second four-way reversing valve (20) is controlled to execute the third communication mode, the motor heat exchange pipeline (302) is communicated with the battery heat exchange pipeline (301), and at the moment, the intermediate heat exchanger (9) exchanges heat.

9. The integrated battery thermal management vehicle air conditioner of any of claims 1-8, wherein:

the vehicle air conditioner further comprises an expansion water tank (18), wherein the expansion water tank (18) is communicated with the motor heat exchange pipeline (302) so as to supply water to the motor heat exchange pipeline (302).

10. A control method of a vehicle air conditioner integrated with battery thermal management according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

and a control step of controlling whether the heat exchanger (6) in the vehicle is used for cooling or heating, whether the intermediate heat exchanger (9) is used for running, whether the battery heat exchange pipeline (301) is connected and whether the motor heat exchange pipeline (302) is connected according to the running mode of the vehicle air conditioner.

11. The control method according to claim 10, characterized in that:

in the control step, when the operation mode is a passenger compartment refrigeration mode, the compressor (8) is controlled to be turned on, the vehicle-interior heat exchanger (6) is used for refrigerating, and the intermediate heat exchanger (9) is not used for exchanging heat;

when the operation mode is a passenger compartment heating mode, controlling the compressor (8) to be opened, heating the vehicle-interior heat exchanger (6), and not exchanging heat by the intermediate heat exchanger (9);

when the operation mode is a battery + motor self-circulation mode, the compressor (8) is controlled to be closed, the intermediate heat exchanger (9) does not exchange heat, the battery heat exchange pipeline (301) is not communicated with the motor heat exchange pipeline (302), and the battery heat exchange pipeline (301) and the motor heat exchange pipeline (302) operate respectively;

when the operation mode is a motor battery heating mode, the compressor (8) is controlled to be closed, the intermediate heat exchanger (9) does not exchange heat, the battery heat exchange pipeline (301) is communicated with the motor heat exchange pipeline (302) to form a loop, and the battery is heated through the heat of the motor;

when the operation mode is a battery cooling mode, the compressor (8) is controlled to be started, the heat exchanger (6) in the vehicle does not exchange heat, the heat exchanger (7) outside the vehicle heats, the intermediate heat exchanger (9) exchanges heat, the battery heat exchange pipeline (301) is connected for operation, and the motor heat exchange pipeline (302) is disconnected;

when the operation mode is a battery heating mode, the compressor (8) is controlled to be opened, the heat exchanger (6) in the vehicle does not exchange heat, the heat exchanger (7) outside the vehicle carries out refrigeration, the intermediate heat exchanger (9) carries out heat exchange, the battery heat exchange pipeline (301) is connected for operation, and the motor heat exchange pipeline (302) is disconnected;

when the operation mode is a passenger compartment refrigeration and battery cooling mode, the compressor (8) is controlled to be started, the vehicle-mounted heat exchanger (6) performs refrigeration, the intermediate heat exchanger (9) is connected with the vehicle-mounted heat exchanger (6) in parallel and performs heat exchange, the battery heat exchange pipeline (301) is connected for operation, and the motor heat exchange pipeline (302) is disconnected;

when the operation mode is a passenger compartment heating and battery heat recovery mode, the compressor (8) is controlled to be started, the heat exchanger (6) in the vehicle heats, the heat exchanger (7) outside the vehicle refrigerates, the intermediate heat exchanger (9) is connected with the heat exchanger (7) outside the vehicle in parallel and exchanges heat, the battery heat exchange pipeline (301) is connected for operation, and the motor heat exchange pipeline (302) is disconnected;

when the operation mode is a passenger compartment refrigeration mode, a battery cooling mode and a motor cooling mode, the compressor (8) is controlled to be started, the vehicle-mounted heat exchanger (6) performs refrigeration, the intermediate heat exchanger (9) is connected with the vehicle-mounted heat exchanger (6) in parallel and performs heat exchange, the battery heat exchange pipeline (301) is communicated and operated, and the motor heat exchange pipeline (302) is communicated with the battery heat exchange pipeline (301);

when the operation mode is a passenger compartment heating mode, a battery heat recovery mode and a motor heat recovery mode, the compressor (8) is controlled to be started, the heat exchanger (6) in the vehicle heats, the heat exchanger (7) outside the vehicle refrigerates, the intermediate heat exchanger (9) is connected with the heat exchanger (7) outside the vehicle in parallel and exchanges heat, the battery heat exchange pipeline (301) is communicated and operated, and the motor heat exchange pipeline (302) is communicated with the battery heat exchange pipeline (301);

when the operation mode is in a passenger compartment heating + battery heating + motor heat recovery mode, the compressor (8) is controlled to be opened, the heat exchanger (6) in the vehicle heats, the heat exchanger (7) outside the vehicle refrigerates, the intermediate heat exchanger (9) is connected with the heat exchanger (6) in the vehicle in parallel and exchanges heat, the battery heat exchange pipeline (301) is communicated and operated, and the motor heat exchange pipeline (302) is communicated with the battery heat exchange pipeline (301).

12. The control method according to claim 11, characterized in that:

when simultaneously including first four-way reversing valve (14), three-way valve (13) and second four-way reversing valve (20), first electronic expansion valve (10) and second electronic expansion valve (11), and first four-way reversing valve (14) includes C end, D end, E end and S end, three-way valve (13) include first end (131), second end (132) and third end (133), and second four-way reversing valve (20) include fifth end (201), sixth end (202), seventh end (203) and eighth end (204):

in the control step, when the running mode is a passenger compartment cooling mode, the C end (C) of the first four-way reversing valve (14) is controlled to be communicated with the D end (D), the E end (E) of the first four-way reversing valve is controlled to be communicated with the S end (S), and the second electronic expansion valve (11) is controlled to be disconnected;

when the running mode is a passenger compartment heating mode, controlling the C end (C) of the first four-way reversing valve (14) to be communicated with the S end (S), controlling the E end (E) to be communicated with the D end (D), and disconnecting the second electronic expansion valve (11);

when the running mode is a battery + motor self-circulation mode, controlling the fifth end (201) of the second four-way reversing valve (20) to be communicated with the eighth end (204), and controlling the sixth end (202) to be communicated with the seventh end (203);

when the operation mode is a motor-heating battery mode, controlling the fifth end (201) of the second four-way reversing valve (20) to be communicated with the sixth end (202), and controlling the eighth end (204) to be communicated with the seventh end (203);

when the operation mode is a battery cooling mode, controlling a C end (C) and a D end (D) of the first four-way reversing valve (14) to be communicated, an E end (E) and an S end (S) to be communicated, the second electronic expansion valve (11) to be communicated, the first electronic expansion valve (10) to be closed, the first end (131) and the second end (132) of the three-way valve (13) to be communicated, the fifth end (201) and the eighth end (204) of the second four-way reversing valve (20) to be communicated, and the sixth end (202) and the seventh end (203) to be communicated;

when the operation mode is a battery heating mode, controlling a C end (C) and an S end (S) of the first four-way reversing valve (14) to be communicated, an E end (E) and a D end (D) to be communicated, the second electronic expansion valve (11) to be communicated, the first electronic expansion valve (10) to be closed, the third end (133) and the second end (132) of the three-way valve (13) to be communicated, the fifth end (201) and the eighth end (204) of the second four-way reversing valve (20) to be communicated, and the sixth end (202) and the seventh end (203) to be communicated;

when the operation mode is a passenger compartment cooling and battery cooling mode, controlling a C end (C) and a D end (D) of the first four-way reversing valve (14) to be communicated, an E end (E) and an S end (S) to be communicated, switching on the first electronic expansion valve (10) and the second electronic expansion valve (11), communicating the first end (131) and the second end (132) of the three-way valve (13), communicating the fifth end (201) and the eighth end (204) of the second four-way reversing valve (20), and communicating the sixth end (202) and the seventh end (203);

when the operation mode is a passenger compartment heating + battery heat recovery mode, controlling a C end (C) and an S end (S) of the first four-way reversing valve (14), an E end (E) and a D end (D) of the first four-way reversing valve, communicating the first electronic expansion valve (10) and the second electronic expansion valve (11), communicating the first end (131) and the second end (132) of the three-way valve (13), communicating the fifth end (201) and the eighth end (204) of the second four-way reversing valve (20), and communicating the sixth end (202) and the seventh end (203);

when the operation mode is a passenger compartment cooling mode, a battery cooling mode and a motor cooling mode, controlling a C end (C) and a D end (D) of the first four-way reversing valve (14) to be communicated, an E end (E) and an S end (S) of the first four-way reversing valve to be communicated, the first electronic expansion valve (10) and the second electronic expansion valve (11) to be communicated, the first end (131) and the second end (132) of the three-way valve (13) to be communicated, the fifth end (201) and the sixth end (202) of the second four-way reversing valve (20) to be communicated, and the eighth end (204) and the seventh end (203) to be communicated;

when the operation mode is a passenger compartment heating + battery heat recovery + motor heat recovery mode, controlling a C end (C) and an S end (S) of the first four-way reversing valve (14) to be communicated, an E end (E) and a D end (D) of the first four-way reversing valve to be communicated, the first electronic expansion valve (10) and the second electronic expansion valve (11) to be communicated, the first end (131) and the second end (132) of the three-way valve (13) to be communicated, the fifth end (201) and the sixth end (202) of the second four-way reversing valve (20) to be communicated, and the eighth end (204) and the seventh end (203) to be communicated;

when the operation mode is a passenger compartment heating + battery heating + motor heat recovery mode, controlling a C end (C) and an S end (S) of the first four-way reversing valve (14) to be communicated, controlling an E end (E) and a D end (D) to be communicated, controlling the first electronic expansion valve (10) and the second electronic expansion valve (11) to be communicated, communicating the third end (133) and the second end (132) of the three-way valve (13), communicating the fifth end (201) and the sixth end (202) of the second four-way reversing valve (20), and communicating the eighth end (204) and the seventh end (203).

13. The control method according to claim 10, characterized in that:

the method also comprises a detection step of detecting the battery temperature TC and the motor temperature TD;