A heat pump air conditioning system and a vehicle having the same

Abstract

The application relates to an automobile air conditioning system, in particular to a heat pump air conditioning system and a vehicle with the heat pump air conditioning system, which comprises an air conditioning system and a battery thermal management system; the air conditioning system is connected with the battery thermal management system through a first heat exchange unit; the heat pump air conditioning system disclosed by the application can realize the coordinated use of the air conditioning system and the battery thermal management system through the arrangement of the first heat exchange unit; and the coordinated use of the air conditioning system and the battery thermal management system can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to an automobile air conditioning system, in particular to a heat pump air conditioning system and a vehicle with the same. BACKGROUND

[0002] As a kind of high efficiency energy saving, green environmental protection technology, heat pump air conditioning system has wide application in heating, hot water and drying etc.

[0003] With the outbreak of global energy crisis and the rise of fuel prices, heat pump technology is revalued due to its efficient recovery of low temperature environment heat, energy saving and environmental protection.

[0004] The existing heat pump air conditioning system has some problems in practical application, such as many parts, complex pipeline, high power consumption of thermal management system, etc.

[0005] In addition, there is a lack of connection between each component system in the existing heat pump air conditioning system, which cannot realize coordinated use, and thus cannot select a more appropriate operation mode according to different working conditions.

[0006] In addition, there is a lack of direct relevance between the air conditioning system and the battery thermal management system, and the heat exchange capacity between them is poor.

[0007] The existing patent 2023117363548-vehicle thermal management system, vehicle and control method of vehicle thermal management system does not explicitly disclose the technical content to solve the above technical problems.

[0008] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing vehicle thermal management system. SUMMARY

[0009] The purpose of the present application is to provide a new type of heat pump air conditioning system.

[0010] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0011] A heat pump air conditioning system, comprising an air conditioning system and a battery thermal management system; the air conditioning system is connected with the battery thermal management system through a first heat exchange unit.

[0012] The heat pump air conditioning system further comprises a low temperature cooling system; the low temperature cooling system is connected with the battery thermal management system through a connection system.

[0013] The heat pump air conditioning system further comprises a heating system, which is connected with the air conditioning system or / and the battery thermal management system.

[0014] The heating system is connected with an HVAC assembly in an air conditioning system; the heating system is connected with a battery thermal management system through a second heat exchange unit.

[0015] The first heat exchange unit comprises a battery cooler; the air conditioning system exchanges heat with the battery thermal management system through the battery cooler.

[0016] The second heat exchange unit comprises a water-water heat exchanger; the heating system is connected with the battery thermal management system through the water-water heat exchanger.

[0017] The heating system comprises a first heater; the first heater is connected with an air conditioner heater in the air conditioning system through a heating pipeline.

[0018] The air conditioning system comprises a compressor, a condenser and an HVAC assembly; the HVAC assembly comprises an evaporator and an air conditioner heater; the compressor, the condenser and the HVAC assembly are connected through an air conditioning pipeline;

[0019] The low-temperature cooling system comprises an electrical device, a first pump body and a radiator; the electrical device, the first pump body and the radiator are connected through a cooling pipeline;

[0020] The battery thermal management system comprises a battery pack and a third pump body; the third pump body is connected with the battery pack through a battery pipeline;

[0021] The heating system further comprises a second pump body; the second pump body, the first heater and the air conditioner heater are connected through the heating pipeline;

[0022] The connecting system comprises a first connecting pipeline and a second connecting pipeline; the first connecting pipeline and the second connecting pipeline are respectively connected on the low-temperature cooling system and the battery thermal management system.

[0023] The air conditioning pipeline comprises a first air conditioning pipeline, a second air conditioning pipeline, a third air conditioning pipeline, a fourth air conditioning pipeline and a fifth air conditioning pipeline;

[0024] The first air conditioning pipeline is connected with the second air conditioning pipeline and the fourth air conditioning pipeline through a four-way reversing valve;

[0025] The second air conditioning pipeline, the fourth air conditioning pipeline and the fifth air conditioning pipeline are connected through a three-way stop valve;

[0026] The first air conditioning pipeline is provided with a compressor;

[0027] The second air conditioning pipeline is connected with a condenser;

[0028] One end of the third air conditioning pipeline is connected with the condenser, and the other end is connected with the fourth air conditioning pipeline or / and the fifth air conditioning pipeline;

[0029] The fourth air conditioning pipeline is provided with an HVAC assembly; and the fifth air conditioning pipeline is connected with a first heat exchange unit.

[0030] The air conditioning pipeline, the battery pipeline, the cooling pipeline and the heating pipeline are provided with control valves.

[0031] A vehicle comprising the heat pump air conditioning system.

[0032] The heat pump air conditioning system has the advantages that:

[0033] The heat pump air conditioning system and a vehicle having the same are disclosed.

[0034] The heat pump air conditioning system disclosed in the application can realize the coordinated use of the air conditioning system and the battery thermal management system through the arrangement of the first heat exchange unit, and can realize the coordinated use of the air conditioning system and the battery thermal management system.

[0035] Meanwhile, the heat pump air conditioning system disclosed in the application can realize various thermal management function mode requirements of the vehicle through the coordinated use of the air conditioning system, the battery thermal management system, the heating system, the low-temperature cooling system and the connecting system, and greatly improves the application scenarios of the heat pump air conditioning system. DETAILED DESCRIPTION

[0036] The content expressed by each drawing of the specification of the application and the marks in the drawings are briefly described as follows:

[0037] Figure 1 It is a schematic diagram of the heat pump air conditioning system in the application.

[0038] Figure 2 It is a system circulation diagram of the air conditioning refrigeration mode-1 in the application.

[0039] Figure 3 It is a system circulation diagram of the air conditioning refrigeration mode-2 in the application.

[0040] Figure 4 It is a system circulation diagram of the air conditioning refrigeration + battery forced cooling mode in the application.

[0041] Figure 5 It is a system circulation diagram of the battery forced cooling mode in the application.

[0042] Figure 6 It is a first system circulation diagram of the air conditioning refrigeration dehumidification mode in the application.

[0043] Figure 7 It is a second system circulation diagram of the air conditioning refrigeration dehumidification mode in the application.

[0044] Figure 8 It is a system circulation diagram of the air conditioning heat pump dehumidification and heat pump heating mode in the application.

[0045] Figure 9 System circulation diagram for the air-conditioning heat pump heating mode of the present application.

[0046] Figure 10 System circulation diagram for the air-conditioning heat pump heating + battery forced cooling mode of the present application.

[0047] Figure 11 System circulation diagram for the air-conditioning deicing mode of the present application.

[0048] Figure 12 System circulation diagram for the motor cooling mode of the present application.

[0049] Figure 13 System circulation diagram for the battery uniform temperature mode of the present application.

[0050] Figure 14 System circulation diagram for the battery heating mode of the present application.

[0051] Figure 15 System circulation diagram for the battery heating mode of the present application.

[0052] Figure 16 System circulation diagram for the battery heating mode of the present application.

[0053] Figure 17 System circulation diagram for the battery natural cooling mode of the present application.

[0054] Figure 18 System circulation diagram for the battery forced cooling mode of the present application.

[0055] Figure 19 System circulation diagram for the motor waste heat recovery mode of the present application.

[0056] Figure 20 System circulation diagram for the passenger compartment heating and warming mode of the present application.

[0057] The marks in the above diagrams are as follows:

[0058] 1. Compressor, 2. Three-way stop valve, 3. Four-way reversing valve, 4. HVAC assembly, 5. Battery thermal management system, 6. Chiller, 7. Water-water heat exchanger, 8. First heater, 9. Low-temperature cooling system, 10. Front-end cooling module. DETAILED DESCRIPTION

[0059] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0060] The application discloses a heat pump air conditioning system which comprises an air conditioning system and a battery thermal management system 5; the air conditioning system is connected with the battery thermal management system 5 through a first heat exchange unit; the heat pump air conditioning system can realize the coordinated use of the air conditioning system and the battery thermal management system 5 through the arrangement of the first heat exchange unit; and the coordinated use of the air conditioning system and the battery thermal management system 5 can be realized.

[0061] In the application, the heat pump air conditioning system further comprises a low-temperature cooling system 9; the low-temperature cooling system 9 is connected with the battery thermal management system 5 through a connecting system; the heat pump air conditioning system further comprises a heating system which is connected with the air conditioning system or / and the battery thermal management system 5; the heat pump air conditioning system can realize various thermal management function mode requirements of the whole vehicle through the coordinated use of the air conditioning system, the battery thermal management system 5, the heating system, the low-temperature cooling system 9 and the connecting system; and the application range of the heat pump air conditioning system is greatly improved.

[0062] The heat pump air conditioning system has multiple practical scenes, and the application range of the heat pump air conditioning system is greatly improved.

[0063] The heat pump air conditioning system mainly comprises an air conditioning system, a battery thermal management system 5, a heating system, a low-temperature cooling system 9 and a connecting system.

[0064] The air conditioning system mainly comprises a compressor 1, a condenser and an HVAC assembly 4; the HVAC assembly 4 comprises an evaporator and an air conditioning heater; the compressor 1, the condenser and the HVAC assembly 4 are connected through air conditioning pipelines.

[0065] The battery thermal management system 5 comprises a battery pack and a third pump body; the third pump body is connected with the battery pack through a battery pipeline 51; the battery pack can be controlled in temperature through the arrangement of the battery thermal management system 5.

[0066] The heating system comprises a first heater 8; the first heater 8 is connected with an air conditioning heater in the air conditioning system through a heating pipeline; the heating system further comprises a second pump body; the second pump body, the first heater 8 and the air conditioning heater are connected through a heating pipeline 81; the heating system can be used to heat the passenger cabin and keep the battery pack warm in winter in cold regions.

[0067] The low-temperature cooling system 9 comprises an electric device, a first pump body and a radiator; the electric device, the first pump body and the radiator are connected through a cooling pipeline 91; the low-temperature cooling system 9 can realize the cooling of the electric device, and the waste heat of the electric device can be utilized through the connecting system.

[0068] The connecting system disclosed by the application comprises a first connecting pipeline 101 and a second connecting pipeline 102; the first connecting pipeline 101 and the second connecting pipeline 102 are connected to the low-temperature cooling system 9 and the battery thermal management system 5 respectively; the connecting system is arranged, so that the low-temperature cooling system 9 and the battery thermal management system 5 are connected, and the low-temperature cooling system 9 and the battery thermal management system 5 are used cooperatively in subsequent use.

[0069] In addition, in the application, the air conditioning system and the battery thermal management system 5 are connected through the first heat exchange unit; the first heat exchange unit is arranged, so that heat exchange between the air conditioning system and the battery thermal management system 5 is realized, and different heat exchange modes can be selected according to different working conditions.

[0070] In the application, the heat pump air conditioning system further comprises a low-temperature cooling system 9; the low-temperature cooling system 9 is connected to the battery thermal management system 5 through the connecting system; the connecting system is arranged, so that the low-temperature cooling system 9 and the battery thermal management system 5 are connected, and the low-temperature cooling system 9 and the battery thermal management system 5 are used cooperatively in subsequent use.

[0071] Meanwhile, in the application, the heat pump air conditioning system further comprises a heating system, which is connected to the air conditioning system or / and the battery thermal management system 5; the heating system is arranged, so that an additional heating point is provided, and the heating mode can be used to heat the passenger compartment and keep the battery pack warm in winter in cold regions.

[0072] In actual connection, the heating system can be connected to the air conditioning system alone or connected to the battery thermal management system 5 alone; in order to optimize the working condition of the whole heat pump air conditioning system, the heating system can be connected to the air conditioning system and the battery thermal management system 5 simultaneously.

[0073] In the application, the heating system is connected to the HVAC assembly 4 in the air conditioning system; the first heater 8 in the heating system is connected to the air conditioning heater through the heating pipeline 81; based on the arrangement, the cooling liquid heated by the first heater 8 can enter the air conditioning heater, and then the heated air can be blown into the passenger compartment by the blowing of the air blower, so as to heat the passenger compartment.

[0074] In the application, the heating system is connected to the battery thermal management system 5 through the second heat exchange unit; the second heat exchange unit comprises a water-water heat exchanger 7; the heating system is connected to the battery thermal management system 5 through the water-water heat exchanger 7; the second heat exchange unit is arranged, so that the heating system and the battery thermal management system 5 exchange heat, and thus the thermal management of the battery is realized.

[0075] Further, in the application, the first heat exchange unit comprises a battery cooler; the air conditioning system exchanges heat with the battery thermal management system 5 through the battery cooler; the battery cooler is arranged; and the battery cooler is mainly used for cooling the battery pack.

[0076] Further, in the application, the air conditioning pipeline comprises a first air conditioning pipeline 1-1, a second air conditioning pipeline 1-2, a third air conditioning pipeline 1-3, a fourth air conditioning pipeline 1-4 and a fifth air conditioning pipeline 1-5; the first air conditioning pipeline 1-1 is connected with the second air conditioning pipeline 1-2 and the fourth air conditioning pipeline 1-4 through a four-way reversing valve 3; the second air conditioning pipeline 1-2, the fourth air conditioning pipeline 1-4 and the fifth air conditioning pipeline 1-5 are connected through a three-way stop valve 2; the first air conditioning pipeline 1-1 is provided with a compressor 1; the second air conditioning pipeline 1-2 is connected with a condenser; one end of the third air conditioning pipeline 1-3 is connected with the condenser, and the other end is connected with the fourth air conditioning pipeline 1-4 or / and the fifth air conditioning pipeline 1-5; the fourth air conditioning pipeline 1-4 is provided with an HVAC assembly 4; the fifth air conditioning pipeline 1-5 is connected with the first heat exchange unit; one end of the fourth air conditioning pipeline 1-4 is connected with the four-way reversing valve 3; the other end is connected with the third air conditioning pipeline 1-3; one end of the fifth air conditioning pipeline 1-5 is connected with the three-way stop valve 2; and the other end is connected with the third air conditioning pipeline 1-3; based on the above, through the cooperation of the four-way reversing valve 3 and the three-way stop valve 2, the air conditioning pipeline can have multiple loops, so that it can be suitable for different working conditions.

[0077] In addition, in the application, control valves are arranged on the air conditioning pipeline, the battery pipeline 51, the cooling pipeline 91 and the heating pipeline 81; the arrangement position and the number of the control valves are selected according to actual working conditions; in addition, in the application, the control valves are mainly divided into S-EXV valves and WV valves; the S-EXV is mainly an expansion valve; the WV valve is mainly a stop valve; and the specific selection can be selected according to the working conditions.

[0078] A vehicle comprising the heat pump air conditioning system.

[0079] The heat pump air conditioning system disclosed in the application is based on a direct + indirect heat pump air conditioning system architecture; high-temperature and high-pressure refrigerant gas discharged by the compressor 1 firstly enters the built-in condenser in the air conditioning HVAC box assembly.

[0080] When heating is needed in winter, the mixed air door opens the hot air passage, the airflow blown by the air conditioning HVAC blower flows through the built-in condenser core, exchanges heat with the high-temperature refrigerant gas, is heated and sent to the vehicle cabin, and has the effect of heating the passenger cabin.

[0081] The refrigerant is cooled by cold air in the built-in condenser core, and then condensed into a medium-temperature refrigerant liquid that flows out of the built-in condenser:

[0082] 1. flows into the external evaporative condenser, and is vaporized under the throttling action of the electronic expansion valve to absorb heat from the external air, and then is sucked into the compressor 1 to complete the refrigerant cycle.

[0083] 2. When the motor heat is high, the battery water temperature is high, and the cell temperature is higher than the energy efficiency interval, it flows to the CHILLER 6, and absorbs the heat of the antifreeze in the battery circuit under the throttling action of the electronic expansion valve, and then is sucked into the compressor 1 to complete the refrigerant cycle. This process can also reduce the temperature of the battery cell.

[0084] 3. If the external evaporative condenser is frosted under the working condition of 1 and the condition of 2 is also met, the refrigerant passes through the external evaporative condenser, and the electronic expansion valve is fully opened to defrost the evaporative condenser, and another part executes according to the flow path of 2.

[0085] The present application is a direct + indirect heat pump system architecture, which utilizes refrigerant to directly dissipate heat in the built-in condenser core of the air conditioner HVAC, has high heat exchange efficiency and fast temperature rise speed.

[0086] At the same time, indirect heat exchange is used to realize passenger cabin heating + defrosting without starting the heater, thereby reducing energy consumption.

[0087] The present application can adapt to a liquid-cooled liquid-heated battery pack system, and also supports a direct-cooling direct-heating battery pack system. The illustrated example is a liquid-cooled liquid-heated battery pack system, which matches the battery cooler (Chiller 6) to forcibly cool and heat the battery, and has a motor battery waste heat recovery function.

[0088] When the battery needs to be forcibly cooled, the system starts the refrigeration operation mode, and the S-EXV3 valve of the Chiller 6 is opened, so that the refrigerant flows into the Chiller 6 to evaporate and absorb heat, thereby cooling the battery coolant and achieving the purpose of cooling the battery.

[0089] When the heat pump heating mode is started, if the motor battery heat is sufficient, the system can also start the Chiller 6 working cycle to transfer the heat in the motor and battery coolant to the refrigerant through the Chiller 6, thereby recycling the waste heat and improving the system efficiency and heating capacity of the heat pump.

[0090] The main components of the heat pump air conditioning system disclosed by the application include the following: an electric compressor 1, a three-way stop valve 2 (channeling refrigerant flow to stop / through), a four-way reversing valve 3 (adjusting the flow direction of refrigerant), an HVAC assembly 4 (passenger cabin ventilation, refrigeration and heating functions), a battery thermal management system (battery pack temperature equalization / cooling / warming thermal management functions), a chiller 6 (realizing heat exchange between refrigerant and battery path anti-freezing fluid), a water-water heat exchanger 7 (realizing heat exchange between high-temperature water area and battery path anti-freezing fluid), a first heater 8 (used for providing hot water for a water system), a low-temperature cooling system 9 (motor and electrical device temperature equalization / cooling thermal management functions), a front-end cooling module 10 (thermal management system and external air heat exchange module) and an S-EXV (acting on refrigerant to realize on-off, pressure reduction and expansion).

[0091] The above main components, connecting pipelines between system components, temperature and pressure sensors and control module software constitute the entire thermal management system, and various thermal management function mode requirements of the whole vehicle can be realized.

[0092] The implementation is as follows:

[0093] Main function mode operation description:

[0094] One: refrigeration system mode operation description:

[0095] Example 1:

[0096] Air conditioning refrigeration mode-1

[0097] When the air conditioning refrigeration mode is run, the controller issues an instruction to start the electric compressor 1 (EDC), and high-temperature and high-pressure refrigerant gas is discharged from the compressor 1, enters the four-way reversing valve 3 (1 in and 2 out), then flows through the outdoor condenser (COND), and is cooled by external air in the condenser (COND) to become medium-temperature and high-pressure refrigerant liquid.

[0098] After passing through the S-EXV 1 (full on), the refrigerant liquid enters the S-TXV 2 (adjustment) and then enters the evaporator (EVAP) in the air conditioning box (HVAC) after throttling and pressure reduction by the S-TXV 2 valve. The refrigerant liquid is largely vaporized at low pressure, absorbs heat of the air in the vehicle through the evaporator, and realizes the function of refrigeration and temperature reduction of the vehicle environment.

[0099] The evaporated refrigerant gas enters the four-way reversing valve 3 (3 in and 4 out), and finally flows through the low-pressure port of the gas-liquid separation tank to return to the inlet of the compressor 1, and the refrigeration cycle is repeated.

[0100] Example 2:

[0101] 2) Air conditioning refrigeration mode-2:

[0102] The thermal management system architecture described in the application, when the whole vehicle refrigeration demand is calculated, and the battery can be heated (low temperature of the electric core, non high efficient interval), the controller sends instructions to start the electric compressor 1 (EDC), the high temperature and high pressure refrigerant gas is discharged from the compressor 1 exhaust port, enters through the four-way reversing valve 3 (1 in, 2 out), then flows through the three-way stop valve 2 (8 in, 9 out).

[0103] The refrigerant liquid flows through the Chiller 6, is cooled by the cooling liquid in the battery path to become medium temperature and high pressure refrigerant liquid, at this time, the antifreeze liquid in the battery path is also heated. After passing through the S-EXV 3 (full open), then entering the S-TXV 2 (adjustment), after throttling and pressure reduction of the S-TXV 2 valve, entering the evaporator (EVAP) of the air conditioning box (HVAC), the refrigerant liquid is largely vaporized at low pressure, absorbs the heat of the air in the vehicle through the evaporator, and realizes the refrigeration and cooling effect of the vehicle environment.

[0104] The evaporated refrigerant gas enters through the four-way reversing valve 3 (6 in, 7 out), then flows through the low pressure port of the gas-liquid separation tank, and returns to the compressor 1 inlet, to repeat the refrigeration cycle.

[0105] At this time, the electronic water pump 3 (Pump-3) of the battery thermal management water path is opened, the cooling liquid of the battery water path flows through the battery cooler, and is heated and raised in temperature by the refrigerant and then flows out.

[0106] The cooling liquid completes the cooling cycle of the battery pack through ③ in and ② out of the WV4 and 1 in of the WV5.

[0107] Example 3:

[0108] 3) Air conditioning refrigeration + battery forced cooling mode:

[0109] The thermal management system architecture described in the application, when the air conditioning refrigeration + battery forced cooling mode is run, the controller sends instructions, the air conditioning system opens the S-EXV 3 valve on the basis of the refrigeration cycle flow path, throttles and reduces the pressure of the split refrigerant, and then flows into the battery cooler (CHILLER 6) to evaporate and absorb heat, so as to reduce the temperature of the cooling liquid flowing into the CHILLER 6, and then flows through the three-way stop valve 2 (9 in, 10 out), and then flows through the low pressure port of the gas-liquid separation tank, and returns to the compressor 1 inlet.

[0110] At this time, the electronic water pump 3 (Pump-3) of the battery thermal management water path is opened, the cooling liquid of the battery water path flows through the battery cooler, and is heated and raised in temperature by the refrigerant and then flows out.

[0111] The cooling liquid completes the cooling cycle of the battery pack through ③ in and ② out of the WV4 and 1 in of the WV5.

[0112] Example 4:

[0113] 4) Battery Forced Cooling Mode

[0114] The thermal management system architecture described in the present application, when running the battery forced cooling mode, the controller issues instructions, and the air conditioning system is in the air conditioning refrigeration + battery forced cooling mode, the S-TXV2 valve is closed.

[0115] After the refrigerant is throttled and depressurized through the S-EXV3 valve, it flows into the battery cooler (CHILLER6) to evaporate and absorb heat, reducing the temperature of the cooling liquid flowing into CHILLER6, and returning to the suction port of compressor 1.

[0116] At this time, the water circulation flow path is the same as the air conditioning refrigeration + battery forced cooling mode.

[0117] Example 5:

[0118] 5) Air conditioning refrigeration dehumidification mode:

[0119] The thermal management system architecture described in the present application, when running the air conditioning refrigeration dehumidification mode, the principle is the same as the air conditioning refrigeration mode-1 / 2.

[0120] Example 6:

[0121] 6) Air conditioning heat pump dehumidification and heat pump heating mode:

[0122] The thermal management system architecture described in the present application, when running the air conditioning heat pump dehumidification mode, the controller issues instructions to start the electric compressor 1 (EDC), and the high-temperature and high-pressure refrigerant gas from the exhaust port of the compressor 1 passes through the four-way valve 3⑴ in and⑶ out, and then flows through the evaporator (EVAP) in the air conditioning box (HVAC). In the air conditioning box (HVAC), heat is released to the passenger compartment, and the refrigerant cools to form a medium-temperature and high-pressure refrigerant liquid.

[0123] After passing through S-TXV2 (full pass), then entering S-EXV1 (adjustment), after throttling and depressurizing through S-EXV1 valve, entering outdoor condenser (COND), the refrigerant liquid is largely vaporized at low pressure, and the heat of the air outside the vehicle is absorbed by the condenser. The evaporated refrigerant gas passes through the four-way valve 3⑵ in and⑷ out, and finally flows through the low-pressure port of the gas-liquid separation tank, back to the suction port of the compressor 1, and repeats the heat pump cycle.

[0124] Example 7:

[0125] 7) Air conditioning heat pump heating mode:

[0126] The thermal management system architecture described in the present application, when running the air conditioning heat pump heating mode, is the same as the heat pump dehumidification.

[0127] Example 8:

[0128] 8) Air conditioning heat pump heating + battery forced cooling mode:

[0129] The heat management system architecture described in the application, when running the air conditioning heat pump heating + battery forced cooling mode, the controller issues instructions, the controller issues instructions, starts the electric compressor 1 (EDC), the high-temperature and high-pressure refrigerant gas from the compressor 1 exhaust port, through the four-way reversing valve 3⑴in, ⑶out, into the evaporator (EVAP) of the air conditioning box (HVAC), At this time, the refrigerant is cooled by the air in the vehicle to a medium-temperature and high-pressure refrigerant liquid, and at the same time, the heating of the passenger compartment is realized, the medium-temperature and high-pressure refrigerant liquid then passes through S-TXV2 (full pass), through S-EXV3 (adjustment), The refrigerant liquid is vaporized in large quantities at low pressure, absorbs the heat of the battery flow path antifreeze through Chiller6, realizes the cooling of the battery flow path antifreeze, then flows through the three-way stop valve 2, ⑹in, ⑸out, through the four-way reversing valve 3⑵in, ⑷out, and then through the low-pressure port of the gas-liquid separation tank, back to the compressor 1 inlet, and repeat the refrigeration cycle.

[0130] At this time, the electronic water pump 3 (Pump-3) of the battery heat management waterway is turned on, and the coolant of the battery waterway flows through the battery cooler and is heated and warmed up by the refrigerant before flowing out.

[0131] From ③in ②out of WV4 and ①in of WV5, the cooling cycle of the coolant to the battery pack is completed.

[0132] Example 9:

[0133] 9) Air conditioning deicing mode:

[0134] The heat management system architecture described in the application, when running the system deicing mode, based on the air conditioning refrigeration mode-1, the waterway system HVH works, and the waterway working cycle is: Pump-2 water pump works, antifreeze to HVH, then through WV3 ①in ②out, then into the evaporator (Heater), by adjusting the heating power, realize the heating comfort of the passenger compartment, and realize the condenser deicing.

[0135] Two: cooling system mode operation explanation

[0136] Example 10

[0137] 1) Motor cooling mode:

[0138] The heat management system architecture described in the application, when running the motor cooling mode, the controller issues instructions, the electronic water pump (Pump-1) of the motor cooling water circuit is started, the coolant of the driving motor water circuit flows into the CDU and the MUC, then passes through WV1③ into ② out, passes through Tank-1, enters the low-temperature heat exchanger (LTR), and is cooled by the outside air in it, then passes through WV2② into ③ out, returns to the water pump, and completes the water circuit circulation of the motor cooling mode.

[0139] Example 11

[0140] 2) Battery equalization mode

[0141] The heat management system architecture described in the application, when running the battery equalization mode, the controller issues instructions, the electronic water pump (Pump-3) of the battery heat management water circuit is started, the coolant of the driving battery water circuit passes through the battery, Chiller6, then enters WV4③ into ② out, then passes through the water-water heat exchanger 7 (W-W), Tank-3, then passes through WV5① into ② out, completes the self-circulation of the battery water circuit to achieve the purpose of battery equalization.

[0142] Example 12

[0143] 3) Battery heating mode - HVH heating

[0144] The heat management system architecture described in the application, when running the battery heating mode, the controller issues instructions, the warm air electronic water pump (Pump-2) is started, the coolant of the driving warm air water circuit passes through the HVH, the antifreeze is heated in the HVH, then enters WV3① into ③ out, then passes through the water-water heat exchanger 7 (W-W), and exchanges heat with the water in the battery circuit in the W-W, realizes the heating of the battery circuit, and returns to Pump-2 to realize circulation.

[0145] In this process, the battery water circuit circulation refers to the synchronous operation of the battery equalization.

[0146] Example 13

[0147] 4) Battery heating mode - refrigerant heating

[0148] The heat management system architecture described in the application, when running the battery heating mode, the electric compressor 1 (EDC) is started, the high-temperature and high-pressure refrigerant gas from the exhaust port of the compressor 1 passes through the four-way reversing valve 3⑴ into ⑶ out, then passes through the three-way stop valve 2, 7 into 6 out, flows through Chiller6, and realizes heat exchange with the battery antifreeze in Chiller6 to heat the battery circuit antifreeze.

[0149] At the same time, the refrigerant cooling temperature is reduced to a medium temperature and high pressure refrigerant liquid. After S-EXV3 (full access), then into S-EXV1 (adjustment), after the throttling of S-EXV1 valve, into the outdoor condenser (COND), the refrigerant liquid is largely vaporized at low pressure, through the condenser absorbs the heat of the air outside the car, the evaporated refrigerant gas, through the four-way valve 3⑵in,⑷out, finally again through the low pressure port of the gas-liquid separation tank, back to the compressor 1 inlet, repeat the cycle. In this process, the battery water circuit circulation reference battery uniform temperature synchronous operation.

[0150] Example 14

[0151] 5) battery heating mode - battery motor waste heat heating

[0152] The heat management system architecture described in the application, when running the battery heating mode, the controller issues instructions, the electronic water pump (Pump-3) of the battery thermal management water circuit is turned on, the coolant of the battery water circuit is driven to pass through the battery, then enters WV4③in①out, enters WV2①in③out, then passes through Pump-1 (not turned on), CDU, MCU, absorbs heat in MCU, heats the antifreeze, passes through WV1③in①out, and finally returns to the electronic water pump (Pump-3) through WV5③in②out, to complete the purpose of battery water circuit heating.

[0153] Example 15

[0154] 6) battery heating mode - battery natural cooling

[0155] The heat management system architecture described in the application, when running the battery natural cooling mode, the controller issues instructions, the electronic water pump (Pump-3) of the battery thermal management water circuit is turned on, the coolant of the battery water circuit is driven to pass through the battery, then enters WV4③in①out, enters WV2①in②out, then passes through LTR, and completes the heat dissipation of the battery antifreeze through the action of the fan in LTR, passes through Tank-1 over WV1②in①out, and finally returns to the electronic water pump (Pump-3) through WV5③in②out, to complete the water circuit circulation of the battery natural cooling mode.

[0156] Example 16

[0157] 7) battery forced cooling mode

[0158] This mode is consistent with the refrigeration system mode 4, and the battery system flow direction is consistent with the cooling system mode 2.

[0159] Example 17

[0160] 8) motor waste heat recovery mode

[0161] Consistent with the cooling system mode 5 battery waste heat heating.

[0162] Embodiment 18

[0163] 9) Heating mode of passenger cabin

[0164] The heat management system architecture described in the application, when the passenger cabin is running and the heater needs to be heated when the heat pump capacity is insufficient, the controller issues an instruction, the heater electronic water pump (Pump-2) is turned on, and the coolant of the heater water circuit is driven through the HVH. The antifreeze is heated in the HVH, then enters the WV3 ① in ② out, and then the heated antifreeze enters the heater in the HVAC, and after heating the passenger cabin, it returns to the electronic water pump (Pump-2) to form a water circuit water circulation.

[0165] In the next process, the refrigerant circuit executes cooling system mode 6 air conditioning heat pump dehumidification and heat pump heating mode.

[0166] In summary, the above-mentioned heat management system can meet most of the heat management function modes of new energy vehicles, and is more efficient than traditional new energy heat management systems, can fully utilize the heat in the system, and is suitable for matching use of different vehicle models.

[0167] Based on the above:

[0168] The heat management system architecture described in the application can control the on-off of different valve groups in the refrigerant integrated module to circulate the refrigerant in different flow paths, and achieve the following air conditioning refrigeration system function modes.

[0169]

[0170]

[0171] Note: Constantly on means maximum path; ON means working; OFF means closed; Ctrl means control.

[0172] The heat management system architecture described in the application circulates the coolant in different flow paths to achieve the following air conditioning cooling system function modes.

[0173] Table 2: Cooling system mode summary table

[0174]

[0175] Obviously, the specific implementation of the application is not limited by the above-mentioned manner, and various non-essential improvements using the method concept and technical solution of the application are within the protection scope of the application.

Claims

1. A heat pump air conditioning system, characterised in that, The air conditioning system is connected with the battery thermal management system through a first heat exchange unit. The air conditioning system comprises a compressor, a condenser and an HVAC assembly; the HVAC assembly comprises an evaporator and an air conditioning heater; the compressor, the condenser and the HVAC assembly are connected through an air conditioning pipeline. The heat pump air conditioning system further comprises a low-temperature cooling system; the low-temperature cooling system is connected with the battery thermal management system through a connecting system. The heat pump air conditioning system further comprises a heating system, which is connected with the air conditioning system or / and the battery thermal management system. The low-temperature cooling system comprises an electric device, a first pump body and a radiator; the electric device, the first pump body and the radiator are connected through a cooling pipeline. The battery thermal management system comprises a battery pack and a third pump body; the third pump body is connected with the battery pack through a battery pipeline. The heating system further comprises a second pump body; the second pump body, a first heater and an air conditioning heater are connected through a heating pipeline. The connecting system comprises a first connecting pipeline and a second connecting pipeline; the first connecting pipeline and the second connecting pipeline are respectively connected on the low-temperature cooling system and the battery thermal management system. The air conditioning pipeline comprises a first air conditioning pipeline, a second air conditioning pipeline, a third air conditioning pipeline, a fourth air conditioning pipeline and a fifth air conditioning pipeline. The first air conditioning pipeline is connected with the second air conditioning pipeline and the fourth air conditioning pipeline through a four-way reversing valve. The second air conditioning pipeline, the fourth air conditioning pipeline and the fifth air conditioning pipeline are connected through a three-way stop valve. The first air conditioning pipeline is provided with a compressor. The second air conditioning pipeline is connected with a condenser. One end of the third air conditioning pipeline is connected with the condenser, and the other end is connected with the fourth air conditioning pipeline or / and the fifth air conditioning pipeline. The fourth air conditioning pipeline is provided with an HVAC assembly; the fifth air conditioning pipeline is connected with a first heat exchange unit. Control valves are arranged on the air conditioning pipeline, the battery pipeline, the cooling pipeline and the heating pipeline.

2. The heat pump air conditioning system according to claim 1, wherein The heating system is connected with the HVAC assembly in the air conditioning system; the heating system is connected with the battery thermal management system through a second heat exchange unit.

3. The heat pump air conditioning system according to claim 1, wherein The first heat exchange unit comprises a battery cooler; the air conditioning system exchanges heat with the battery thermal management system through the battery cooler.

4. The heat pump air conditioning system according to claim 2, wherein The second heat exchange unit comprises a water-water heat exchanger; the heating system is connected with the battery thermal management system through the water-water heat exchanger.

5. The heat pump air conditioning system according to claim 1, wherein The heating system comprises a first heater; the first heater is connected with an air conditioning heater in the air conditioning system through a heating pipeline.

6. A vehicle characterized by comprising: The heat pump air conditioning system comprises the heat pump air conditioning system according to any one of claims 1-5.

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