Heat pump air conditioning system and vehicle with same

Abstract

The invention 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, comprising an air-conditioning system and a battery thermal management system, the air conditioning system is connected with the battery heat management system through the first heat exchange unit; according to the heat pump air conditioning system, through the arrangement of the first heat exchange unit, the air conditioning system and the battery heat management system can be used in a coordinated and matched mode; the air conditioning system and the battery heat management system can be used in a coordinated manner.

Description

Technical Field

[0001] The invention relates to an automobile air-conditioning system, in particular to a heat pump air-conditioning system and a vehicle having the heat pump air-conditioning system. Background Art

[0002] As a highly efficient, energy-saving, and green technology, heat pump air-conditioning systems are widely used in heating, hot water, and drying.

[0003] With the outbreak of the global energy crisis and the rise in fuel prices, heat pump technology has regained attention due to its high efficiency in recovering heat energy from low-temperature environments and its energy-saving and environmentally friendly features.

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

[0005] In addition, there is a lack of connection between the various component systems in the existing heat pump air-conditioning system, which cannot be coordinated and used, and thus cannot select a more appropriate operating mode according to different working conditions.

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

[0007] The existing patent 2023117363548 - Vehicle thermal management system, vehicle and control method of vehicle thermal management system does not clearly disclose the technical content for solving the above-mentioned 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 automotive thermal management system. Summary of the invention

[0009] The purpose of the present invention is to provide a novel heat pump air conditioning system.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is:

[0011] A heat pump air conditioning system comprises an air conditioning system and a battery thermal management system; the air conditioning system is connected to the battery thermal management system via a first heat exchange unit.

[0012] The heat pump air conditioning system also includes a low-temperature cooling system; the low-temperature cooling system is connected to the battery thermal management system through a connection system.

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

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

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

[0016] The second heat exchange unit includes a water-to-water heat exchanger; the heating system is connected to the battery thermal management system via the water-to-water heat exchanger.

[0017] The heating system comprises a first heater; the first heater is connected to an air-conditioning heater in the air-conditioning system through a heating pipe.

[0018] The air conditioning system includes a compressor, a condenser and an HVAC assembly; the HVAC assembly includes an evaporator and an air conditioning 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 component, a first pump body and a radiator; the electrical component, the first pump body and the radiator are connected via a cooling pipeline;

[0020] The battery thermal management system includes a battery pack and a third pump body; the third pump body is connected to 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 conditioning heater are connected via a heating pipeline;

[0022] The connection system includes a first connection pipe and a second connection pipe; the first connection pipe and the second connection pipe are respectively connected to the low-temperature cooling system and the battery thermal management system.

[0023] The air conditioning pipeline includes 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 to 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 via a three-way stop valve;

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

[0027] The second air conditioning pipeline is connected to the condenser;

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

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

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

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

[0032] The advantages of the present invention are:

[0033] The invention discloses a heat pump air-conditioning system and a vehicle having the heat pump air-conditioning system.

[0034] The heat pump air-conditioning system disclosed in the present invention can realize the coordinated use of the air-conditioning system and the battery thermal management system through the provision of the first heat exchange unit; it can realize the coordinated use of the air-conditioning system and the battery thermal management system.

[0035] At the same time, the heat pump air-conditioning system disclosed in the present invention can realize various thermal management function mode requirements of the whole vehicle through the coordinated use of the air-conditioning system, battery thermal management system, heating system, low-temperature cooling system and connection system, thereby greatly improving the applicable scenarios of the heat pump air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0037] Figure 1 It is the principle diagram of the heat pump air conditioning system in the present invention.

[0038] Figure 2 This is a system cycle diagram of the air conditioner cooling mode-1 of the present invention.

[0039] Figure 3 This is the system cycle diagram of the air conditioner cooling mode-2 of the present invention.

[0040] Figure 4 This is a system cycle diagram of the air conditioning refrigeration + battery forced cooling mode of the present invention.

[0041] Figure 5 This is a system cycle diagram of the battery forced cooling mode of the present invention.

[0042] Figure 6 This is the first system cycle diagram of the air conditioning refrigeration and dehumidification mode of the present invention.

[0043] Figure 7 This is the second system cycle diagram of the air conditioning refrigeration and dehumidification mode of the present invention.

[0044] Figure 8 This is a system cycle diagram of the air conditioning heat pump dehumidification and heat pump heating mode of the present invention.

[0045] Fig. 9 This is a cycle diagram of the air conditioning heat pump heating mode system of the present invention.

[0046] Fig.10 This is the system cycle diagram of the air conditioning heat pump heating + battery forced cooling mode of the present invention.

[0047] Fig.11 This is a cycle diagram of the air conditioning deicing mode system of the present invention.

[0048] Fig.12 This is a system cycle diagram of the motor cooling mode of the present invention.

[0049] Fig.13 This is a system cycle diagram of the battery temperature equalization mode of the present invention.

[0050] Fig.14 This is a system cycle diagram of the battery heating mode of the present invention.

[0051] Fig.15 This is a system cycle diagram of the battery heating mode of the present invention.

[0052] Fig.16 This is a system cycle diagram of the battery heating mode of the present invention.

[0053] Fig.17 This is a system cycle diagram of the battery natural cooling mode of the present invention.

[0054] Fig.18 This is a system cycle diagram of the battery forced cooling mode of the present invention.

[0055] Fig.19 This is a system cycle diagram of the motor waste heat recovery mode of the present invention.

[0056] Fig. 20 This is a system cycle diagram for the passenger compartment heating and supplementary heating mode of the present invention.

[0057] The marks in the above figure are:

[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-to-water heat exchanger, 8. High-voltage electric heater, 9. Low-temperature cooling system, 10. Front-end cooling module. DETAILED DESCRIPTION

[0059] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0060] A heat pump air-conditioning system comprises an air-conditioning system and a battery thermal management system 5; the air-conditioning system is connected to the battery thermal management system 5 via a first heat exchange unit; the heat pump air-conditioning system disclosed in the present invention can achieve coordinated use of the air-conditioning system and the battery thermal management system 5 through the setting of the first heat exchange unit; and can achieve coordinated use of the air-conditioning system and the battery thermal management system 5.

[0061] In the present invention, the heat pump air-conditioning system also includes a low-temperature cooling system 9; the low-temperature cooling system 9 is connected to the battery thermal management system 5 through a connecting system; the heat pump air-conditioning system also includes a heating system, and the heating system is connected to the air-conditioning system and / or the battery thermal management system 5; the heat pump air-conditioning system disclosed in the present invention 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; greatly improve the applicable scenarios of the heat pump air-conditioning system.

[0062] The heat pump air-conditioning system disclosed in the present invention has multiple practical scenarios, which greatly improves the scope of application of the present invention.

[0063] The heat pump air conditioning system disclosed in the present invention mainly includes an air conditioning system, a battery thermal management system 5, a heating system, a low-temperature cooling system 9 and a connection system.

[0064] The air conditioning system of the present invention mainly includes a compressor 1, a condenser and an HVAC assembly 4; the HVAC assembly 4 includes an evaporator and an air conditioning heater; the compressor 1, the condenser and the HVAC assembly 4 are connected through an air conditioning pipeline.

[0065] The battery thermal management system 5 disclosed in the present invention includes a battery pack and a third pump body; the third pump body is connected to the battery pack through a battery pipeline 51; the present invention can control the temperature of the battery pack through the setting of the battery thermal management system 5.

[0066] The heating system disclosed in the present invention includes a first heater 8; the first heater 8 is connected to the air-conditioning heater in the air-conditioning system through a heating pipe; the heating system also includes a second pump body; the second pump body, the first heater 8 and the air-conditioning heater are connected through a heating pipe 81; through the use of the heating system, the present invention can enable users in cold areas in winter to use the heating system to heat the passenger compartment and keep the battery pack warm.

[0067] The low-temperature cooling system 9 disclosed in the present invention includes electrical components, a first pump body and a radiator; the electrical components, the first pump body and the radiator are connected via a cooling pipe 91; the low-temperature cooling system 9 disclosed in the present invention can realize the cooling of electrical components, and at the same time, in conjunction with the connection system, it can also utilize the waste heat of the electrical components.

[0068] The connection system disclosed in the present invention includes a first connecting pipe 101 and a second connecting pipe 102; the first connecting pipe 101 and the second connecting pipe 102 are respectively connected to the low-temperature cooling system 9 and the battery thermal management system 5; the present invention facilitates the connection between the low-temperature cooling system 9 and the battery thermal management system 5 through the setting of the connection system, and facilitates the coordinated use of the low-temperature cooling system 9 and the battery thermal management system 5 in subsequent use.

[0069] In addition, in the present invention, the air-conditioning system and the battery thermal management system 5; the air-conditioning system is connected to the battery thermal management system 5 through a first heat exchange unit; the setting of the first heat exchange unit can realize the heat exchange between the air-conditioning system and the battery thermal management system 5, and it is convenient to select different heat exchange modes according to different working conditions.

[0070] In the present invention, the heat pump air-conditioning system also includes a low-temperature cooling system 9; the low-temperature cooling system 9 is connected to the battery thermal management system 5 through a connection system; the present invention facilitates the connection between the low-temperature cooling system 9 and the battery thermal management system 5 through the setting of the connection system, and facilitates the coordinated use of the low-temperature cooling system 9 and the battery thermal management system 5 during subsequent use.

[0071] At the same time, the heat pump air-conditioning system in the present invention also includes a heating system, which is connected to the air-conditioning system and / or the battery thermal management system 5; the setting of the heating system of the present invention is equivalent to providing an additional heating point, so that users in cold areas in winter can use the heating mode to heat the passenger compartment and keep the battery pack warm.

[0072] During actual connection, the heating system can be connected to the air-conditioning system alone, or it can be connected to the battery thermal management system 5 alone; in order to optimize the operating conditions of the entire heat pump air-conditioning system, in the present invention, the heating system can be connected to the air-conditioning system and the battery thermal management system 5 at the same time.

[0073] In the present invention, the heating system is connected to the HVAC assembly 4 in the air-conditioning system; the first heater 8 in the heating system of the present invention is connected to the air-conditioning heater through a heating pipe 81; based on such a setting, the coolant heated by the first heater 8 can enter the air-conditioning heater, and then the heated air is blown into the passenger compartment under the blowing of the blower for heating the passenger compartment.

[0074] In the present invention, the heating system is connected to the battery thermal management system 5 through a second heat exchange unit; the second heat exchange unit includes a water-to-water heat exchanger 7; the heating system is connected to the battery thermal management system 5 through a water-to-water heat exchanger 7; the second heat exchange unit is set up, and the heating system exchanges heat with the battery thermal management system 5, thereby realizing thermal management of the battery.

[0075] Furthermore, in the present invention, the first heat exchange unit includes a battery cooler; the air conditioning system performs heat exchange with the battery thermal management system 5 through the battery cooler; the battery cooler is mainly used to cool the battery pack.

[0076] Further, in the present invention, the air conditioning pipeline includes 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 to 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; a compressor 1 is provided on the first air conditioning pipeline 1-1; the second air conditioning pipeline 1-2 is connected to a condenser; one end of the third air conditioning pipeline 1-3 is connected to The first end of the air conditioning pipeline 1-5 is connected to the condenser, and the other end is connected to the fourth air-conditioning pipeline 1-4 and / or 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 to the first heat exchange unit; one end of the fourth air-conditioning pipeline 1-4 is connected to the four-way reversing valve 3; the other end is connected to the third air-conditioning pipeline 1-3, one end of the fifth air-conditioning pipeline 1-5 is connected to the three-way stop valve 2, and the other end is connected to the third air-conditioning pipeline 1-3; based on the above, through the coordinated use of the four-way reversing valve 3 and the three-way stop valve 2, the air-conditioning pipeline can have multiple circuits, so that it can be suitable for different working conditions.

[0077] In addition, control valves are provided on the air-conditioning pipeline, battery pipeline 51, cooling pipeline 91 and heating pipeline 81 in the present invention; the location and quantity of the control valves are selected according to the actual working conditions; in addition, the control valves in the present invention are mainly divided into S-EXV valves and WV valves; S-EXV is mainly an expansion valve; WV valve is mainly a stop valve; when selecting, it can be selected according to the working conditions.

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

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

[0080] When heating is needed in winter, the mixing damper opens the hot air channel, and the air flow blown out by the air-conditioning HVAC blower flows through the built-in condenser core, exchanges heat with the high-temperature refrigerant gas, and is sent into the cabin after being heated, thereby heating the passenger compartment.

[0081] After the refrigerant is cooled by the cold air in the built-in condenser core, it condenses into medium-temperature refrigerant liquid and flows out of the built-in condenser:

[0082] 1. It flows to the external evaporative condenser and, under the throttling action of the electronic expansion valve, it is depressurized and evaporates, absorbing heat from the outside air and vaporizing, and then is sucked into 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 its energy efficiency range, it flows to CHILLER6 and absorbs the heat of the antifreeze in the battery circuit to vaporize under the throttling effect of the electronic expansion valve, and then is sucked into compressor 1 to complete the refrigerant cycle. This process can also reduce the battery cell temperature simultaneously.

[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. At this time, the electronic expansion valve is fully opened to defrost the evaporative condenser, and the other part is executed according to the flow path of 2.

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

[0086] At the same time, by utilizing indirect heat exchange, the passenger compartment can be heated and defrosted without starting the heater, thus reducing energy consumption.

[0087] The present invention can be adapted to a liquid-cooled and liquid-heated battery pack system, and also supports a direct-cooled and direct-heated battery pack system. The illustrated case is a liquid-cooled and liquid-heated battery pack system, which is matched with a battery cooler (Chiller6) to perform forced cooling / heating of the battery and motor battery waste heat recovery functions.

[0088] When the battery needs forced cooling, the system starts the refrigeration operation mode, and at the same time the S-EXV3 valve of Chiller6 opens, and the refrigerant flows into Chiller6 to evaporate and absorb heat, cooling the battery coolant, thereby achieving the purpose of cooling the battery.

[0089] When the heat pump is in heating mode, if the motor and battery have sufficient heat, the system can also start the Chiller6 working cycle to transfer the heat in the motor and battery water circuit coolant to the refrigerant through Chiller6, recovering the waste heat and improving the system efficiency and heating capacity of the heat pump.

[0090] The heat pump air conditioning system disclosed in the present invention has the following main components: an electric compressor 1, a three-way stop valve 2 (blocking / opening the refrigerant flow in the channel), a four-way reversing valve 3 (adjusting the refrigerant flow direction), an HVAC assembly 4 (passenger compartment ventilation, cooling and heating functions), a battery thermal management system (battery pack temperature equalization / cooling / heating thermal management functions), Chiller 6 (realizing heat exchange between the refrigerant and the antifreeze in the battery circuit), a water-to-water heat exchanger 7 (realizing heat exchange between the high-temperature water area and the antifreeze in the battery circuit), a first heater 8 (for providing hot water to the water supply system), a low-temperature cooling system 9 (motor and electrical components temperature equalization / cooling thermal management function), a front-end cooling module 10 (thermal management system and external air heat exchange module) and an S-EXV (which has the functions of switching on and off, reducing pressure and expanding the refrigerant).

[0091] The above main components plus the connecting pipes between the system components, as well as the temperature, pressure sensors and control module software, constitute the entire thermal management system, which can realize the various thermal management function mode requirements of the whole vehicle.

[0092] The examples are as follows:

[0093] Main function mode operation instructions:

[0094] 1. Refrigeration system mode operation instructions:

[0095] Embodiment 1:

[0096] Air conditioning cooling mode-1

[0097] In the thermal management system architecture of the present invention, when the air conditioning cooling mode is running, the controller sends a command to start the electric compressor 1 (EDC), and the high-temperature and high-pressure refrigerant gas enters and exits from the exhaust port of the compressor 1 through the four-way reversing valve 3 (1) and (2), and then flows through the outdoor condenser (COND), and is cooled by the outside air in the condenser (COND) to become a medium-temperature and high-pressure refrigerant liquid.

[0098] It passes through S-EXV1 (full pass) and then enters S-TXV2 (regulation). After throttling and reducing the pressure by the S-TXV2 valve, it enters the evaporator (EVAP) of the air conditioning box (HVAC). The refrigerant liquid vaporizes in large quantities under low pressure and absorbs the heat of the air in the car through the evaporator, achieving the effect of cooling the environment in the car.

[0099] The evaporated refrigerant gas enters through the four-way reversing valve 3⑶ and exits through ⑷, and finally flows through the low-pressure port of the gas-liquid separation tank and returns to the air inlet of the compressor 1, repeating the refrigeration cycle.

[0100] Embodiment 2:

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

[0102] The thermal management system architecture described in the present invention operates in this cooling mode when the cooling demand of the vehicle is calculated to be small and the battery can be heated (the battery cell temperature is low and it is not in the high-efficiency range). The controller issues a command to start the electric compressor 1 (EDC), and the high-temperature and high-pressure refrigerant gas enters and exits from the exhaust port of the compressor 1 through the four-way reversing valve 3 (1) and then flows through the three-way stop valve 2, (5) and (6) respectively.

[0103] It flows through Chiller6, where it is cooled by the coolant in the battery circuit to become a medium-temperature and high-pressure refrigerant liquid, while heating the antifreeze in the battery circuit. It passes through S-EXV3 (full-pass) and then enters S-TXV2 (adjustment). After throttling and reducing the pressure of the S-TXV2 valve, it enters the evaporator (EVAP) of the air conditioning box (HVAC). The refrigerant liquid vaporizes in large quantities under low pressure and absorbs the heat of the air in the car through the evaporator, achieving the effect of cooling the environment in the car.

[0104] The evaporated refrigerant gas enters through the four-way reversing valve 3⑶ and exits through ⑷, then flows through the low-pressure port of the gas-liquid separation tank and returns to the air inlet of the compressor 1, repeating the refrigeration cycle.

[0105] At this time, the electronic water pump 3 (Pump-3) of the battery thermal management water circuit is turned on, driving the coolant in the battery water circuit to flow through the battery cooler, and then flows out after being heated by the refrigerant.

[0106] The coolant completes the cooling cycle of the battery pack through the ③ inlet and ② outlet of WV4 and the ① inlet of WV5.

[0107] Embodiment 3:

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

[0109] The thermal management system architecture described in the present invention, when running the air conditioning refrigeration + battery forced cooling mode, the controller sends a command, and the air conditioning system opens the S-EXV3 valve on the basis of the refrigeration cycle flow path, throttling and reducing the pressure of the diverted refrigerant, and then flows into the battery cooler (CHILLER6) to evaporate and absorb heat, thereby reducing the temperature of the coolant flowing into CHILLER6, and then passes through the three-way stop valve 2, ⑹ in, ⑺ out, and then flows through the low-pressure port of the gas-liquid separation tank to return to the air inlet of the compressor 1.

[0110] At this time, the electronic water pump 3 (Pump-3) of the battery thermal management water circuit is turned on, driving the coolant in the battery water circuit to flow through the battery cooler, and then flows out after being absorbed heat and cooled by the refrigerant.

[0111] The coolant completes the cooling cycle of the battery pack through the ③ inlet and ② outlet of WV4 and the ① inlet of WV5.

[0112] Embodiment 4:

[0113] 4) Battery forced cooling mode

[0114] In the thermal management system architecture described in the present invention, when the battery forced cooling mode is running, the controller sends an instruction, and the air-conditioning system closes the S-TXV2 valve in the air-conditioning cooling + battery forced cooling mode.

[0115] After all the refrigerant is throttled and reduced in pressure by the S-EXV3 valve, it flows into the battery cooler (CHILLER6) to evaporate and absorb heat, thereby lowering the temperature of the coolant flowing into CHILLER6, and then returns to the suction port of compressor 1.

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

[0117] Embodiment 5:

[0118] 5) Air conditioning cooling and dehumidification mode:

[0119] The thermal management system architecture described in the present invention, in the air conditioning cooling and dehumidification mode, is equivalent in principle to the air conditioning cooling mode -1 / 2.

[0120] Embodiment 6:

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

[0122] In the thermal management system architecture described in the present invention, when the air conditioning heat pump dehumidification mode is running, the controller sends a command to start the electric compressor 1 (EDC), and the high-temperature and high-pressure refrigerant gas enters and exits from the exhaust port of the compressor 1 through the four-way reversing valve 3⑴, and then flows through the evaporator (EVAP) of the air conditioning box (HVAC). In the air conditioning box (HVAC), heat is released to the passenger compartment, and at the same time, the refrigerant is cooled to become a medium-temperature and high-pressure refrigerant liquid.

[0123] It passes through S-TXV2 (full pass) and then enters S-EXV1 (regulation). After throttling and reducing the pressure of S-EXV1 valve, it enters the outdoor condenser (COND). The refrigerant liquid vaporizes in large quantities under low pressure and absorbs the heat of the air outside the vehicle through the condenser. The evaporated refrigerant gas enters and exits through the four-way reversing valve 3⑵, and finally flows through the low-pressure port of the gas-liquid separation tank and returns to the air inlet of compressor 1 to repeat the heat pump cycle.

[0124] Embodiment 7:

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

[0126] The thermal management system architecture described in the present invention is used for heat pump dehumidification when operating in the air conditioning heat pump heating mode.

[0127] Embodiment 8:

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

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

[0130] At this time, the electronic water pump 3 (Pump-3) of the battery thermal management water circuit is turned on, driving the coolant in the battery water circuit to flow through the battery cooler, and then flows out after being heated by the refrigerant.

[0131] The coolant completes the cooling cycle of the battery pack through the ③ inlet and ② outlet of WV4 and the ① inlet of WV5.

[0132] Embodiment 9:

[0133] 9) Air conditioning de-icing mode:

[0134] The thermal management system architecture described in the present invention, when operating the system de-icing mode, is based on the air conditioning refrigeration mode-1, and the water system HVH works, and the water working cycle is: Pump-2 water pump works, antifreeze reaches HVH, and then enters ② through WV3, and then enters the evaporator (Heater). By adjusting the heating power, the heating comfort of the passenger compartment is achieved while the condenser is de-iced.

[0135] 2. Cooling system mode operation instructions

[0136] Example 10

[0137] 1) Motor cooling mode:

[0138] In the thermal management system architecture described in the present invention, when the motor cooling mode is running, the controller sends a command to start the electronic water pump (Pump-1) of the motor cooling water circuit, driving the coolant in the motor water circuit to flow into the CDU and MUC, and then through WV1③ in and ② out, after passing through Tank-1, enter the low-temperature heat exchanger (LTR), where it is cooled by the outside air, and then through WV2② in and ③ out, return to the water pump, completing the water circuit circulation of the motor cooling mode.

[0139] Embodiment 11

[0140] 2)Battery temperature equalization mode

[0141] The thermal management system architecture described in the present invention, when running the battery temperature equalization mode, the controller sends a command, the electronic water pump (Pump-3) of the battery thermal management water circuit is turned on, and the coolant in the battery water circuit is driven to pass through the battery and Chiller6, and then enter WV4③ in and ② out, and then pass through the water-to-water heat exchanger 7 (WW), Tank-3, and then pass through WV5① in and ② out, completing the battery water circuit self-circulation to achieve the purpose of battery temperature equalization.

[0142] Example 12

[0143] 3) Battery heating mode - HVH heating

[0144] The thermal management system architecture described in the present invention, when running the battery heating mode, the controller sends a command, the heater electronic water pump (Pump-2) is turned on, and the coolant in the heater water circuit is driven to pass through the HVH. The antifreeze is heated in the HVH, and then enters WV3① in ③ out, and then passes through the water-to-water heat exchanger 7 (WW), exchanges heat with the water in the battery circuit in the WW, heats the battery circuit, and then returns to Pump-2 to achieve circulation.

[0145] During this process, the battery water circuit operates synchronously with the battery average temperature.

[0146] Embodiment 13

[0147] 4) Battery heating mode - refrigerant heating

[0148] The thermal management system architecture described in the present invention starts the electric compressor 1 (EDC) when running in the battery heating mode, and the high-temperature and high-pressure refrigerant gas enters from the exhaust port of the compressor 1 through the four-way reversing valve 3 (1) and exits (3), then passes through the three-way stop valves 2, 7 in and 6 out, flows through Chiller 6, and realizes heat exchange with the battery antifreeze in Chiller 6 to heat the battery antifreeze.

[0149] At the same time, the refrigerant is cooled to medium-temperature and high-pressure refrigerant liquid. It passes through S-EXV3 (full pass) and then enters S-EXV1 (regulation). After throttling and reducing the pressure of the S-EXV1 valve, it enters the outdoor condenser (COND). The refrigerant liquid vaporizes in large quantities under low pressure and absorbs the heat of the air outside the vehicle through the condenser. The evaporated refrigerant gas enters and exits through the four-way reversing valve 3⑵, and finally flows through the low-pressure port of the gas-liquid separation tank and returns to the air inlet of compressor 1 to repeat the cycle. In this process, the battery water circuit cycle operates synchronously with the battery temperature equalization.

[0150] Embodiment 14

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

[0152] The thermal management system architecture described in the present invention, when running the battery heating mode, the controller sends a command, the electronic water pump (Pump-3) of the battery thermal management water circuit is turned on, driving the coolant in the battery water circuit to pass through the battery, and then enter WV4③ in ① out, enter WV2① in ③ out, and then pass through Pump-1 (not turned on), CDU, MCU, absorb heat in the MCU, heat the antifreeze, pass through WV1③ in ① out, and finally return to the electronic water pump (Pump-3) through WV5③ in ​​② out, completing the purpose of heating the battery water circuit.

[0153] Embodiment 15

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

[0155] The thermal management system architecture described in the present invention, when running the battery natural cooling mode, the controller sends a command, the electronic water pump (Pump-3) of the battery thermal management water circuit is turned on, driving the coolant in the battery water circuit to pass through the battery, and then enter WV4③ in ① out, enter WV2① in ② out, and then pass through LTR. In LTR, the fan is used to dissipate the heat of the battery antifreeze, pass through Tank-1, pass through WV1② in ① out, and finally return to the electronic water pump (Pump-3) through WV5③ in ​​② out, completing the water circuit circulation in the battery natural cooling mode.

[0156] Example 16

[0157] 7)Battery forced cooling mode

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

[0159] Embodiment 17

[0160] 8) Motor waste heat recovery mode

[0161] Identical to cooling system mode 5 battery waste heat heating.

[0162] Embodiment 18

[0163] 9) Heating and supplementary heating mode for passenger compartment

[0164] The thermal management system architecture described in the present invention is that when the passenger compartment is heated and the heat pump capacity is insufficient and the heater is needed for supplementary heating, the controller sends a command to turn on the heater electronic water pump (Pump-2), driving the coolant in the heater water circuit to pass through the HVH, the antifreeze is heated in the HVH, and then enters WV3 ① in ② out, and then the heated antifreeze enters the Heater in the HVAC, dissipates heat to the passenger compartment, and then returns to the electronic water pump (Pump-2) to form a water circuit replenishment cycle.

[0165] In this 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 thermal management system can meet most of the thermal management function modes of new energy vehicles, and is more efficient than traditional new energy thermal management systems. It can make full use of the heat in the system and is suitable for matching with different models.

[0167] Based on the above:

[0168] The thermal management system architecture described in the present invention can achieve the following functional modes of the air-conditioning refrigeration system by allowing the refrigerant to circulate in different flow paths through the on-off control of different valve groups in the refrigerant integrated module.

[0169]

[0170]

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

[0172] The thermal management system architecture described in the present invention allows the coolant to circulate in different flow paths to achieve the following functional modes of the air conditioning cooling system.

[0173] Table 2 Summary of cooling system modes

[0174]

[0175] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A heat pump air conditioning system, characterized in that: It includes an air conditioning system and a battery thermal management system; the air conditioning system is connected to the battery thermal management system through a first heat exchange unit.

2. A heat pump air conditioning system according to claim 1, characterized in that: The heat pump air conditioning system also includes a low-temperature cooling system; the low-temperature cooling system is connected to the battery thermal management system through a connection system.

3. A heat pump air conditioning system according to claim 1, characterized in that: The heat pump air conditioning system further comprises a heating system, and the heating system is connected to the air conditioning system and / or the battery thermal management system.

4. A heat pump air conditioning system according to claim 3, characterized in that: The heating system is connected to the HVAC assembly in the air-conditioning system; the heating system is connected to the battery thermal management system through a second heat exchange unit.

5. A heat pump air conditioning system according to claim 1, characterized in that: The first heat exchange unit includes a battery cooler; the air conditioning system performs heat exchange with the battery thermal management system through the battery cooler.

6. A heat pump air conditioning system according to claim 4, characterized in that: The second heat exchange unit includes a water-to-water heat exchanger; the heating system is connected to the battery thermal management system via the water-to-water heat exchanger.

7. A heat pump air conditioning system according to claim 3, characterized in that: The heating system comprises a first heater; the first heater is connected to an air-conditioning heater in the air-conditioning system through a heating pipe.

8. A heat pump air conditioning system according to any one of claims 1 to 7, characterized in that: The air conditioning system includes a compressor, a condenser and an HVAC assembly; the HVAC assembly includes an evaporator and an air conditioning heater; the compressor, the condenser and the HVAC assembly are connected through an air conditioning pipeline; The low temperature cooling system comprises an electrical component, a first pump body and a radiator; the electrical component, the first pump body and the radiator are connected via a cooling pipeline; The battery thermal management system includes a battery pack and a third pump body; the third pump body is connected to the battery pack through a battery pipeline; The heating system further comprises a second pump body; the second pump body, the first heater and the air conditioning heater are connected via a heating pipeline; The connection system includes a first connection pipe and a second connection pipe; the first connection pipe and the second connection pipe are respectively connected to the low-temperature cooling system and the battery thermal management system.

9. A heat pump air conditioning system according to claim 8, characterized in that: The air conditioning pipeline includes 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 to 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 via a three-way stop valve; The first air conditioning pipeline is provided with a compressor; The second air conditioning pipeline is connected to the condenser; One end of the third air conditioning pipeline is connected to the condenser, and the other end is connected to the fourth air conditioning pipeline and / or the fifth air conditioning pipeline; The fourth air conditioning pipeline is provided with an HVAC assembly; the fifth air conditioning pipeline is connected to a first heat exchange unit; The air conditioning pipeline, battery pipeline, cooling pipeline and heating pipeline are provided with control valves.

10. A vehicle, characterized in that: It comprises a heat pump air conditioning system as described in any one of claims 1 to 9.

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