CN114872509A - Vehicle air conditioning system, control method thereof and vehicle comprising system - Google Patents

Abstract

The invention discloses a vehicle air conditioning system, comprising: the cooling system comprises a refrigerant loop and a cooling liquid loop, wherein the refrigerant loop flows through at least two serially connected air coolers, the loops at the outflow ends of the at least two air coolers comprise a battery cooling loop and a vehicle cabin cooling loop, the battery cooling loop passes through a battery heat exchanger of the vehicle, and the vehicle cabin cooling loop passes through an evaporation tank of the vehicle; the cooling liquid loop comprises a heating loop and a battery loop, wherein the battery loop comprises a battery heat exchanger and a battery, and the heating loop flows through the at least two air coolers and an evaporation tank of the vehicle to supply heat for the vehicle; the battery loop connects an air cooler of the at least two air coolers and the vehicle evaporator tank to supply heat to the battery. The invention also provides a control method of the air conditioning system and a vehicle provided with the air conditioning system. The vehicle air conditioning system, the control method and the vehicle have higher refrigerating and heating efficiency, and can be suitable for an ultra-low temperature heat pump system adopting a carbon dioxide refrigerant.

Description

Vehicle air conditioning system, control method thereof, and vehicle including the same

technical field

The present invention relates to the field of air temperature regulation, and in particular, to an air conditioning system for a vehicle, a control method thereof, and a vehicle including the system.

Background technique

In the field of new energy electric vehicles, how to improve the comfort of the ambient temperature in the passenger car while reducing the energy consumption of the battery has always been a big problem for the R&D personnel of vehicle thermal management.

The existing air conditioning systems for new energy electric vehicles have at least the following technical problems:

1) Under low temperature conditions, the battery energy storage will be attenuated. At this time, if the air conditioner is turned on to heat the cabin, it will further consume a large amount of power, which will reduce the cruising range.

2) Under the same battery energy storage conditions, in order to increase the endurance routine, it is necessary to consume as little power as possible to achieve the same cooling or heating effect. At this time, the traditional R134a refrigerant heat pump circuit design cannot meet this demand. Under the low temperature condition below -15℃, the battery life will be seriously attenuated, and the system heating energy consumption will be high;

3) The heating circuit and refrigeration circuit mode of the traditional air conditioning system are relatively simple, and the waste heat recovery rate is low.

SUMMARY OF THE INVENTION

In order to solve at least one of the above-mentioned technical problems existing in the prior art, one aspect of the present invention provides a vehicle air conditioning system, and the technical solution is as follows:

A vehicle air conditioning system, comprising: a refrigerant circuit and a coolant circuit, wherein,

The refrigerant circuit flows through at least two air coolers connected in series, and the circuit at the outflow end of the at least two air coolers (downstream direction) includes a battery cooling circuit and a cabin cooling circuit, and the battery cooling circuit passes through the battery heat exchanger of the vehicle, The cabin cooling circuit passes through the vehicle's evaporative tank;

The cooling liquid circuit includes a heating circuit and a battery circuit, wherein the battery circuit includes a battery heat exchanger and a battery, and the heating circuit flows through at least two air coolers and an evaporation box of the vehicle to provide heat for the vehicle; the battery circuit connects at least two air coolers An air cooler in the unit and the vehicle's evaporative box provide heat to the battery.

In some embodiments, the evaporative box has a first warm core connected to a portion of the at least two air coolers and a second warm core connected to another portion of the at least two air coolers And the evaporator, the battery circuit is connected to the second warm core in the vehicle's evaporative box, and the cabin cooling circuit flows through the evaporator. The evaporation box adopts this "double warm core" design, which can efficiently supply heat to the cabin through the heating circuit. Since the battery circuit is connected to the second warm core in the evaporation box, the battery circuit can also be partially heated. At the same time, it is also possible to use the cabin cooling circuit to flow through the evaporator to cool the cabin. On the premise of ensuring the improvement of cooling and heating effects, the battery is heated and insulated to avoid the attenuation of battery energy storage.

In some embodiments, the heating temperature of the first warm core is higher than the heating temperature of the second warm core. Since the heat required for battery heat preservation is low, the corresponding specifications of the warm core can be used at a lower cost, which will not affect the normal operation of the air conditioning system while reducing the cost.

In some specific embodiments, the battery circuit is selectively connected to the second warm core through the multi-way valve assembly, so as to conduct heat collected in the battery circuit to the second warm core. In the case of the battery accumulating heat, if the cabin needs to be heated at this time, the above-mentioned method uses the multi-way valve assembly to selectively introduce the waste heat into the second warm core for the heating circuit to heat the cabin. The reuse of battery heat saves the work intensity of each component in the battery circuit, and saves power and coolant consumption.

In some specific embodiments, the coolant circuit further includes an electric drive circuit, wherein the electric drive circuit includes an electric drive assembly that is powered by a battery to provide power for the vehicle, and the electric drive circuit and the battery circuit are selectively selected by the multi-port valve assembly. On to conduct the heat collected in the electric drive circuit to the battery. In this way, on the one hand, the electric drive circuit can evacuate the heat generated during the operation of the electric drive components; Use, reduce the work intensity of each component in the battery heat preservation and heating circuit, and further save electricity and coolant consumption.

In some specific embodiments, the heat dissipation circuit and at least part of the air coolers in the at least two air coolers are selectively conducted through a multi-way valve assembly, so as to dissipate the heat collected by at least part of the air coolers in the cooling liquid circuit Introduce the cooling circuit. By using at least two air coolers to be connected with the heat dissipation circuit to dissipate heat, the heat diffusion of the cooling liquid in the air coolers can be accelerated, so as to improve the cooling efficiency.

In some specific embodiments, the cooling liquid circuit further includes a heat dissipation circuit, and the heat dissipation circuit and the battery circuit are selectively conducted through a multi-way valve assembly, so as to guide the heat collected in the battery circuit into the heat dissipation circuit. When the vehicle is running for a long time or under special ambient temperature, the battery will also accumulate more heat. At this time, the multi-port valve assembly can be used to selectively guide the accumulated heat of the battery to the heat dissipation circuit to reduce the safety caused by the battery heating. risk.

In some embodiments, a regulating valve assembly for switching the supply of refrigerant to the battery cooling circuit and/or the cabin cooling circuit is configured in the refrigerant circuit. In this way, the battery cooling circuit and/or the cabin cooling circuit can be independently adjusted, and combined with the heating circuit, heating/cooling combined working modes of various combinations of the cabin and the battery can be generated.

In some specific embodiments, an outdoor radiator, a steam heat exchanger and a regenerator are arranged in sequence in the refrigerant circuit, the battery cooling circuit and the cabin cooling circuit are located at the outflow end of the regenerator, and the steam heat exchanger includes condensed water Storage device, atomization device, evaporation device. The special setting position of the steam heat exchanger is conducive to the collection, atomization and evaporation of condensed water during heating, so as to achieve the effect of heating and dehumidification.

In some embodiments, the system uses carbon dioxide as a refrigerant. The above-mentioned air-conditioning system of the present invention has excellent cooling and heating effects in hardware structure. Therefore, when used with carbon dioxide refrigerant with high heat exchange efficiency, the two can be well matched, and the minimum amount of refrigerant circulation can be achieved. cooling and heating effect, saving energy.

The present invention further provides a control method for a vehicle air conditioning system, which is used in the above-mentioned vehicle air conditioning system, and the control method at least includes the following steps:

In the refrigerant circuit, the refrigerant sequentially flows through at least two air coolers connected in series for heat exchange;

In the cooling liquid circuit, the cooling liquid flows through the at least two heat-exchanged air-coolers and the heating circuit to provide heat for the vehicle; and/or the cooling liquid flows through one of the at least two heat-exchanged air-coolers after the heat exchange and battery loop to provide heat to the battery.

Another aspect of the present invention provides a vehicle including the above-mentioned vehicle air conditioning system.

The vehicle air-conditioning system and vehicle of the present invention have higher cooling and heating efficiency, and can be applied to, for example, a low-temperature heat pump system using carbon dioxide refrigerant, to realize a low-energy-consumption, high-efficiency air-conditioning method, and to realize the green environmental protection of the new-energy vehicle air-conditioning as a whole.

Description of drawings

FIG. 1 shows a schematic structural diagram of an embodiment of a vehicle air conditioning system of the present invention;

FIG. 2 shows a schematic structural diagram of another embodiment of the vehicle air conditioning system of the present invention;

FIG. 3 shows a first mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 4 shows a second mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 5 shows a third mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 6 shows a fourth mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 7 shows a fifth mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 8 shows a sixth mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 9 shows a seventh mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 10 shows an eighth mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 11 shows a ninth mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 12 shows a tenth mode schematic diagram of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 13 shows a schematic diagram of an eleventh mode of an embodiment of the vehicle air conditioning system of the present invention;

FIG. 14 shows a schematic structural diagram of still another embodiment of the vehicle air conditioning system of the present invention;

FIG. 15 shows a schematic structural diagram of still another embodiment of the vehicle air conditioning system of the present invention.

Detailed ways

The specific content of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The examples are only used to explain the present invention, but not to limit the scope of the present invention. The features of the examples and embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It should be noted that the terms "first", "second" and the like in the description of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a product comprising a series of units, components, modules or a method or procedure comprising a series of steps is not necessarily limited to expressly All are listed, but may include other units, components, modules or steps not expressly listed or inherent to these products or method products or procedures.

It should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" in this application should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements.

It should be understood that the terms "upstream" and "downstream" in the description of this application refer to the flow direction of the refrigerant or cooling liquid. The terms "on the circuit", "in the circuit", "in the circuit", not "above" and "in the middle" in the spatial sense, can be understood as "located on the circuit". The terms "connected", "conducted" and "connected" indicating the relationship between the flow paths indicate that the fluid between the flow paths can pass therethrough. In addition, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," etc. indicate orientation or positional relationships is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

1 to 15, according to an embodiment of the present invention, an air conditioning system for a vehicle is provided. As a typical example, a heat pump air conditioning system is used in the figure, which is especially suitable for new energy vehicles such as electric vehicles. or a hybrid car. The cooling and heating efficiency of the heat pump air conditioning system for a vehicle is high.

FIG. 1 shows an embodiment of the vehicle air conditioning system of the present invention, the system includes a refrigerant circuit and a cooling liquid circuit, wherein the refrigerant in the refrigerant circuit is compressed by a compressor 101 to become a high-temperature and high-pressure gaseous state and flows out through a series connection. The first air cooler 102A and the second air cooler 102B, and the circuits at the outflow ends of the first air cooler 102A and the second air cooler 102B include a battery cooling circuit and a cabin cooling circuit, and the battery cooling circuit passes through the vehicle's The battery heat exchanger 105, the cabin cooling circuit passes through the evaporator 106 in the vehicle's evaporative tank.

The cooling liquid circuit includes a heating circuit and a battery circuit, wherein the battery circuit includes a battery heat exchanger 105 and a battery 108, and the heating circuit flows through the first air cooler 102A, the second air cooler 102B and the corresponding The first warm core 107A and the second warm core 107B in the evaporative box of the vehicle are used for heating the vehicle, and the battery circuit is connected to the second air cooler 102B and the second warm core for heating the vehicle by the battery. The heating temperature of the first warm core 107A is higher than the heating temperature of the second warm core 107B.

In FIG. 1 , the battery circuit is selectively connected to the second warm core 107B through a multi-way valve assembly (such as the four-way valve 4V3 and the No. 3 three-way valve 3V3 ) (such as the four-way valve 1-4 shown in FIG. 13 ). , 2-3 are turned on; No. 3 three-way valve 1-2 is turned on), so as to introduce the heat collected in the battery circuit into the second warm core 107B to provide heat for the cabin.

The coolant circuit also includes an electric drive circuit, wherein the electric drive circuit includes an electric drive assembly 109 that is powered by the battery 108 and provides power for the vehicle. In FIG. 1 , the electric drive circuit and the battery circuit pass through a five-way valve. 5V is selectively turned on (for example, in Figure 12, valve ports 2-3, 1-4 are turned on) to conduct the heat collected in the electric drive circuit to the battery.

The cooling liquid circuit also includes a heat dissipation circuit, and the heat dissipation circuit and the battery circuit are selectively conducted through the five-way valve 5V and the No. 1 four-way valve (for example, as shown in FIG. 11 , the five-way valve 5V opens. 5-4, 2-3 are turned on; No. 1 four-way valve opening 4-1 is turned on), so as to introduce the heat collected in the battery circuit into the heat dissipation circuit. In FIG. 11 , the heat dissipation circuit is connected to the low-temperature radiator 112 and the electronic fan 113 through the pipeline drawn from the valve port 1-4 of the No. 1 four-way valve 4V1, and is connected from the valve port 2 of the five-way valve through the electric drive circuit. After the port 3 flows out, it is connected to the battery circuit.

The heat dissipation circuit and the first air cooler and/or the second air cooler are selectively conducted through the multi-way valve assembly (as shown in FIG. 8, the openings 1-3 of the No. 1 three-way valve 3V1 are conducted , the openings 1-2 of the No. 2 three-way valve 3V2 are connected, the openings 1-2 and 3-4 of the No. 1 four-way valve 4V1 are connected, the openings 3-4 of the No. 2 four-way valve 4V2 are connected, and the five-way valve The opening 5-2 of 5V is turned on), so as to introduce the heat collected by the first air cooler and/or the second air cooler in the cooling liquid circuit into the heat dissipation circuit.

A regulating valve assembly for switching the supply of refrigerant to the battery cooling circuit and/or the vehicle cabin cooling circuit is configured in the refrigerant circuit. As shown in FIG. 1 , the regulating valve assembly includes a check valve 1CV disposed downstream of the outflow end of the regenerator 104 , a first stop valve SV1 disposed downstream of the outflow end of the air coolers 102A and 102B, and disposed in the gas-liquid separator 110 and the second shut-off valve SV2 upstream of the regenerator 104 .

As an example, as shown in FIG. 1 , an outdoor radiator 103 , a steam heat exchanger 111 and a regenerator 104 are arranged in sequence in the refrigerant circuit, and the battery cooling circuit and the cabin cooling circuit are located in the regenerator 104 downstream of the outflow end. As a preferred embodiment, the steam heat exchanger 111 includes a condensed water storage device, an atomization device, and an evaporation device, so as to achieve good dehumidification performance while heating. The gas-liquid separator 110 is arranged on the refrigerant flow path before returning to the compressor 101 , and downstream of the gas-liquid separator 110 are the regenerator 104 and the compressor 101 respectively. The gas-liquid separator and the regenerator can also be integrated with the regenerator 210, which is located upstream of the compressor 101, as shown in Figs.

In the system shown in FIG. 1, preferably, carbon dioxide used in the refrigerant circuit is used as the refrigerant.

As an embodiment of the present invention, the air cooler includes a refrigerant part of the air cooler and a cooling liquid part of the air cooler, and the refrigerant part and the cooling liquid part realize heat exchange. In the embodiment shown in FIG. 1 , the first air cooler 102A and the second air cooler 102B are arranged in series in sequence to receive the high temperature and high pressure refrigerant fluid from the compressor 101, and the heat of the refrigerant fluid is transferred to the first air cooler cooling liquid in the cooler 102A and the second air cooler 102B. Optionally, the air cooler of the present invention can also be configured as two or more air coolers connected in series in order to improve the heat exchange efficiency of the flow path, and is especially suitable for the working condition of natural refrigerant with higher heat exchange efficiency (not shown in the figure). Shows).

The warm core is located in the vehicle's evaporative tank and is used to provide heat to the vehicle's cabin. In particular, the warm core of the present invention shown in FIG. 1 is provided as two warm cores. Each warm core corresponds to the corresponding air cooler. The heat of the warm core mainly comes from the heat of the cooling liquid of the air cooler. On the one hand, the heating area is increased, and on the other hand, the heating can be adjusted flexibly and efficiently according to needs. quantity. The specific application will be described in detail in the embodiments later in the specification. In the embodiment shown in FIG. 1 , the first warm core 107A is configured to be provided with heat by the cooling liquid portion of the first air cooler 102A, and the second warm core 107B is configured to be provided by the cooling liquid portion of the second air cooler 102B heat. After the heat exchange is completed, the temperature of the first warm core 107A is higher than that of the second warm core 107B.

The battery heat exchanger includes a refrigerant part of the battery heat exchanger and a cooling liquid part of the battery heat exchanger, and the refrigerant part and the cooling liquid part realize heat exchange. In the embodiment of the present invention, a battery heat exchange expansion valve EXV2 (preferably an electronic expansion valve) is provided upstream of the battery heat exchanger 105 . The cooling of the refrigerant is achieved by controlling the throttling of the battery heat exchange expansion valve EXV2.

The outdoor radiator is used to exchange heat between the refrigerant and the outdoor air. In one of the embodiments of the present invention, the outdoor radiator 103 is further provided with an ambient temperature sensor for adjusting the degree of heat exchange of the refrigerant flowing through the outdoor radiator according to the actual ambient temperature.

The steam heat exchanger is used to cool the passing refrigerant. In one of the embodiments of the present invention, the steam heat exchanger includes a condensate storage device. The water in the condensed water storage device may be a condensed liquid stored in advance. Preferably, the condensed water storage device collects the condensed water from the air encountering the refrigerant pipeline, and reuses it for evaporative heat absorption and cooling. Preferably, the steam heat exchanger 111 of the present invention is arranged downstream of the outflow end of the outdoor radiator 103 (as shown in FIG. 1 ), and its condensate water storage device can sufficiently and efficiently collect the condensate that becomes the condensate of the hotter air. water. Preferably, the liquid condensed water in the condensed water storage device is converted into water mist through an atomization device (eg, atomization by using an ultrasonic plate or pressure and then throttling), and then heat is exchanged through evaporation. This setup can increase the surface area for evaporative heat exchange and make the heat exchanger smaller, more compact, and space-saving.

The evaporator is located in the vehicle's evaporative box and is used to cool the passing refrigerant to dehumidify or cool the cabin. In the embodiment of the present invention, an evaporator expansion valve EXV3 (preferably an electronic expansion valve) is provided upstream of the evaporator 106 . By controlling the throttling of the evaporator expansion valve EXV3, the cooling of the refrigerant is realized, and then the cooled refrigerant evaporates after the evaporator to achieve dehumidification or cabin cooling.

The regenerator is used to make the cold and hot fluids in the refrigerant circuit flow through the same channel space, and the fluid realizes heat exchange through direct contact with the regenerating filler, which can improve the heat exchange efficiency and reduce energy consumption. It is especially suitable for air-conditioning flow paths where carbon dioxide is used as a refrigerant. The regenerator includes a low temperature and low pressure side inlet and a high temperature and high pressure side inlet. In the embodiment of FIG. 1 of the present invention, before the regenerative filler flows back to the compressor 101, it first passes through the gas-liquid separator 110, and then flows into the regenerator 104 from the low temperature and low pressure side. At this time, the regenerative filler in the regenerator 104 It is low temperature, so as to further reduce the temperature of the refrigerant fluid flowing into the regenerator 104 from the high temperature and high pressure side, and improve the cooling efficiency.

The gas-liquid separator separates the gaseous and liquid refrigerant flowing back to the compressor, preventing the liquid refrigerant from entering the compressor and damaging the compressor.

Batteries are used to power new energy vehicles, and electric drive components include motors, controllers and other components to drive vehicles.

The low temperature radiator is used to pass the coolant to cool the coolant in the coolant circuit. In the present invention, the airflow blown by the electronic fan 113 can pass through the cooling liquid of the low-temperature radiator 112 and the refrigerant of the outdoor radiator 103, so that the two can fully exchange heat.

Valve-like components are used to control the flow and direction of fluid on the flow path, such as closed state, fully open state, throttling state, etc. In the closed state of the valve parts, the fluid cannot pass; in the fully open state of the valve parts, all the fluid can pass; in the throttling state of the valve parts, the passing fluid is throttled to control the flow of the fluid as required size. In order to better illustrate the present invention, the valve components are divided into: regulating valve assembly, throttle valve assembly and multi-way valve assembly in this application. Wherein, the regulating valve assembly includes a one-way valve (including an open state and a closed state, and in the open state, the fluid is guided only in a single direction), and a stop valve (including a closed state and a fully open state). A throttle valve assembly, such as an electronic expansion valve, includes a closed state, a fully open state, and a throttled state. The multi-way valve assembly includes: three-way valve, four-way valve, five-way valve and the above number of valves. In the embodiment of the present invention, the direction and flow of the fluid in the pipeline are controlled by arranging valve-like components. In one embodiment, as shown in FIG. 1, the valve components include a one-way valve 1CV arranged downstream of the outflow end of the regenerator 104, an electronic expansion valve EXV1 arranged between the air coolers 102A, 102B and the outdoor radiator 103, The first shut-off valve SV1 downstream of the outflow ends of the air coolers 102A and 102B, the second shut-off valve SV2 provided upstream of the gas-liquid separator 110 and the regenerator 104, and the battery heat exchange expansion upstream of the battery heat exchanger 105 Valve EXV2 (also optional electronic expansion valve), evaporator expansion valve EXV3 (also optional electronic expansion valve) disposed upstream of evaporator 106 . The valve components also include No. 1 four-way valve 4V1, No. 2 four-way valve 4V2, No. 2 four-way valve 4V2, five-way valve 5V, No. 1 three-way valve 3V1, No. 2 three-way valve 3V2, No. 3 three-way valve 3V3.

Pump components are used to drive the movement and direction of movement of the fluid in the flow path. 1, the pump components include air cooler water pumps P1 and P2, battery circuit water pump P3, and electric drive circuit water pump P4.

Fig. 2 shows another embodiment of the present invention, which is not much different from the structure of Fig. 1 except that the position of the steam heat exchanger 111' is arranged between the evaporator 106 and the regenerator 104.

In the refrigerant circuit, the refrigerant on the battery cooling circuit passes through in sequence: compressor 101, first air cooler 102A, second air cooler 102B, outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side) enter), battery heat exchanger 105, regenerator 104 (low temperature and low pressure side entry), gas-liquid separator 110, and finally return to compressor 101.

In the refrigerant circuit, the refrigerant on the cabin cooling circuit passes through: the compressor 101, the first air cooler 102A, the second air cooler 102B, the outdoor radiator 103, the steam heat exchanger 111, and the regenerator 104 (high temperature and high pressure). side entry), evaporator 106 (located in the vehicle evaporation box), regenerator 104 (low temperature and low pressure side entry), gas-liquid separator 110, and finally back to compressor 101.

In the cooling liquid circuit, the heating circuit is provided with: a first air cooler 102A and a first warm core 107A located in the evaporative box of the vehicle, wherein the first air cooler 102A is associated with the first warm core 107A to heat it ; The second air cooler 102B is associated with the second warm core 107B for heating. The battery circuit is provided with a battery 108 and a battery heat exchanger 105 . The electric drive circuit is provided with: an electric drive assembly 109 . The heat dissipation circuit is provided with: a low temperature radiator 112 .

The refrigerant circuit and the cooling liquid circuit are arranged such that at the first air cooler 102A, the second air cooler 102B and the battery heat exchanger 105, the heat exchange between the refrigerant and the cooling liquid is completed through the corresponding refrigerant part and the cooling liquid part . That is, the refrigerant part of the first air cooler exchanges heat with the cooling liquid part of the first air cooler, the refrigerant part of the second air cooler exchanges heat with the cooling liquid part of the second air cooler, and the battery heat exchanger The refrigerant part exchanges heat with the coolant part of the battery heat exchanger. The first warm core 107A is arranged to be heated by the cooling liquid portion of the first air cooler 102A (preferably by being connected in series in the same cooling liquid circuit), and the second warm core 107B is arranged to be cooled by the cooling liquid portion of the second air cooler 102B The liquid section provides heat (preferably by being in series in the same cooling liquid circuit).

In the cooling liquid circuit, the battery circuit, electric drive circuit, heating circuit and heat dissipation circuit of the cooling liquid are formed by the switching of the multi-way valve assembly and the driving of the water pump component. In the refrigerant circuit, control the opening and closing of the expansion valve, shut-off valve, and one-way valve to control the flow direction and heat exchange of the refrigerant. In one embodiment, the control method of the vehicle air conditioning system at least includes the following steps: in the refrigerant circuit, the refrigerant flows through at least two air coolers connected in series in sequence for heat exchange; in the cooling liquid circuit, the cooling liquid flows through the heat exchange at least two air coolers and a heating circuit to provide heat for the vehicle to achieve cabin heating; and/or the coolant flows through one of the at least two air coolers after heat exchange and a battery circuit to provide battery heating. In addition to the above-mentioned embodiments, the modes that can be formed by the vehicle heat pump air conditioning system of the present invention will be specifically listed below to realize corresponding functions such as cooling, heating, and deicing. FIG. 3 shows a first mode formed by the vehicle heat pump air conditioning system of the present invention, and this mode cools the vehicle cabin and realizes the cooling of the vehicle cabin. The dotted line in the figure represents the flow path of the refrigerant in the refrigerant circuit. In the refrigerant circuit, the refrigerant comes out of the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in sequence (where only heat exchange is not completed; Heating pumps P1 and P2 do not work), electronic expansion valve EXV1 (full open state), outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side), high pressure side check valve 1CV (full open state) , optionally, it can also be replaced by a stop valve and an electronic expansion valve), the evaporator expansion valve EXV3 (throttle state), the evaporator 106, the gas-liquid separator 110, the regenerator 104 (low temperature and low pressure side), and finally flow back to the Compressor 101 . The above completes the refrigeration cycle of the cabin. In this mode, the battery heat exchange expansion valve EXV2, the first shut-off valve SV1, and the second shut-off valve SV2 are all closed. In the coolant circuit, the heating circuit water pumps P1 and P2, the battery circuit water pump P3, and the electric drive circuit water pump P4 do not work. In this embodiment, the two air coolers 102A, 102B fully cool the refrigerant, exchange heat through the outdoor radiator 103, and the steam heat exchanger 111 collects the condensed water and evaporates it to absorb the heat of the refrigerant in the air-conditioning pipeline, reducing the air-conditioning pipe. The temperature of the refrigerant in the road passes through the regenerator 104 and then passes through the evaporator 106 to achieve cooling and cooling of the vehicle cabin. Optionally, three or more air coolers in series can also be provided as required to improve heat exchange efficiency.

FIG. 4 shows a second mode formed by the vehicle heat pump air conditioning system of the present invention, which is for vehicle cabin heating to achieve vehicle cabin heating. The dotted line in the figure represents the flow path of the refrigerant in the refrigerant circuit; the dashed-dotted line represents the coolant path in the cooling liquid circuit. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in turn (where heat exchange is completed; at this time, the water pumps P1 and P2 in the cooling liquid circuit). working), electronic expansion valve EXV1 (throttled state), outdoor radiator 103, second stop valve SV2 (fully open state), gas-liquid separator 110, regenerator 104 (low temperature and low pressure side), and finally flows back to the compressor 101. In this mode, the one-way valve 1CV is in a fully open state (optionally, an expansion valve or a shut-off valve can also be used instead, if used, it is in a closed state at this time), the battery heat exchange expansion valve EXV2, the evaporator expansion valve EXV3, The first stop valves SV1 are all in a fully closed state. In the coolant circuit, the heating circuit water pumps P1 and P2 work, the battery circuit water pump P3 and the electric drive circuit water pump P4 do not work. The 1-2 opening of the No. 1 three-way valve 3V1 is conductive, the 1-3 opening of the No. 2 three-way valve 3V2 is conductive, the 1-3 opening of the No. 3 three-way valve 3V3 is conductive, and the No. 1 four-way valve 4V1 is connected according to the battery For electric drive requirements, set the openings 1-4, 2-3 or 1-2, 3-4 to conduct, and the openings 1-4 and 2-3 of the No. 2 four-way valve 4V2 to conduct, and the five-way valve 5V can be connected according to Battery and electric drive circuit requirements, realize 1 or 5 in and 2 out, 3 in and 4 out, or 1 in and 4 out, 3 in and 2 out. In this mode, the first warm core 107A and the second warm core 107B are respectively connected in series with the cooling liquid part of the first air cooler 102A and the cooling liquid part of the second air cooler 102B, thereby heating the vehicle cabin. As required, a battery 108 or an electric drive assembly 109 can also be added to the series loop of the second warm core 107B to conduct heat.

FIG. 5 shows a third mode formed by the vehicle heat pump air conditioning system of the present invention, which is the heating of the vehicle cabin and the battery to realize the heating of the vehicle cabin and the battery. The dotted line in the figure represents the flow path of the refrigerant in the refrigerant circuit; the dashed-dotted line and the dashed-two-dotted line both represent the cooling liquid path in the cooling liquid circuit, wherein the dashed-dotted line represents the first warm core 107A and the first air cooling The series circuit formed by the cooling liquid part of the air cooler 102A is used for heating the vehicle cabin; the dashed-dotted line represents the series circuit formed by the second warm core 107B, the cooling liquid part and the battery of the second air cooler 102B, which is used for heating the vehicle cabin. Cabin and battery heating. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in turn (where heat exchange is completed; at this time, the heating circuit water pump in the cooling liquid circuit P1 and P2 work), electronic expansion valve EXV1 (throttled state), outdoor radiator 103, second stop valve SV2 (full open state), gas-liquid separator 110, regenerator 104 (low temperature and low pressure side), the last flow Back to compressor 101. In this mode, the electronic expansion valve EXV1 and the one-way valve 1CV are in a closed state, and the second stop valve SV2 is in a fully open state. In the coolant circuit, the heating circuit water pumps P1 and P2 work, the battery circuit water pump P3 works, and the electric drive circuit water pump P4 does not work. The opening 1-2 of the No. 1 three-way valve 3V1 is connected, the opening 1-3 of the No. 2 three-way valve 3V2 is connected, the opening 1-2 of the No. 3 three-way valve 3V3 is connected, and the opening of the No. 1 four-way valve 4V1 1-4 and 2-3 are connected, the openings 1-4 and 2-3 of the four-way valve 4V2 of No. 2 are connected, and the openings 3-4 of the five-way valve 5V are connected, which can be realized according to the requirements of the electric drive circuit. Or 5 in and 2 out. This mode is especially suitable for the situation that the temperature inside the car exceeds the predetermined temperature, but the battery needs to be heated. At this time, the excess heat of one of the air coolers can be used to heat the battery at the same time to achieve the effect of energy saving. Preferably, as shown in Figure 5 As shown, the cooler circuit of air cooler 102B with a lower temperature is selected to heat the battery 108 .

FIG. 6 shows a fourth mode formed by the vehicle heat pump air conditioning system of the present invention, which is for heating the vehicle cabin and cooling the battery, so as to realize the heating of the vehicle cabin and the cooling of the battery. The dashed line in the figure represents the flow path of the refrigerant in the refrigerant circuit; the dashed line in the battery circuit on the right side of the figure is the cooling liquid path, which is only a schematic label to distinguish the heating circuit and the battery circuit; the single-dotted line represents the first warm core The cooling liquid series circuit formed by 107A and the cooling liquid part of the first air cooler 102B, and the cooling liquid series circuit formed by the second warm core 107B and the cooling liquid part of the second air cooler 102B, are used for heating the cabin. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in turn (where heat exchange is completed; at this time, the heating circuit water pump P1 in the cooling liquid circuit) and P2), electronic expansion valve EXV1, outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side), check valve 1CV, battery heat exchange expansion valve EXV2 (throttle state), battery exchange After the heater 105, the gas-liquid separator 110, and the regenerator 104 (low temperature and low pressure side), it finally flows back to the compressor 101 to complete the refrigerant circuit cycle. In this mode, the first shut-off valve SV1, the second shut-off valve SV2, and the evaporator expansion valve EXV3 are all closed, and EXV2 is throttled as needed. In the coolant circuit, the heating circuit water pumps P1 and P2 work, the battery circuit water pump P3 works, and the electric drive circuit water pump P4 does not work. The opening 1-2 of the No. 1 three-way valve 3V1 is connected, the opening 1-3 of the No. 2 three-way valve 3V2 is connected, the opening 1-3 of the No. 3 three-way valve 3V3 is connected, and the opening of the No. 1 four-way valve 4V1 1-4 and 2-3 are connected, the openings 1-4 and 2-3 of the four-way valve 4V2 of No. 2 are connected, and the openings 3-4 of the five-way valve 5V are connected, which can be realized according to the requirements of the electric drive circuit. Or 5 in and 2 out. In this mode, the first warm core 107A and the second warm core 107B are respectively connected in series with the cooling liquid part of the first air cooler 102A and the cooling liquid part of the second air cooler 102B, thereby heating the vehicle cabin. In the refrigerant circuit, after the refrigerant comes out of the compressor 101 and is cooled down, it is throttled through the battery heat exchange expansion valve EXV2, and then flows to the refrigerant part of the battery heat exchanger 105 after cooling down, so as to cool the battery heat exchanger 105 Liquid cooling; in the cooling liquid circuit, the battery and the battery heat exchanger form a battery circuit of the cooling liquid, and the cooling liquid in the battery heat exchanger cools the battery.

FIG. 7 shows a fifth mode formed by the vehicle heat pump air conditioning system of the present invention, and this mode is the cooling of the vehicle cabin and the battery to realize the cooling of the vehicle cabin and the battery. The dotted lines in the figure represent the flow paths of the refrigerant in the refrigerant circuit and the cooling liquid in the cooling liquid circuit. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in turn (where heat exchange is completed; at this time, the heating circuit water pump P1 in the cooling liquid circuit) and P2), electronic expansion valve EXV1 (throttled state), outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side), check valve 1CV (full open state, optionally, also Expansion valve or stop valve can be used instead), and then divided into two paths: one of the refrigerant passes through the battery heat exchange expansion valve EXV2 (throttled state), the battery heat exchanger 105; the other refrigerant passes through the evaporator expansion valve EXV3 (throttled state) ), the evaporator 106; then the two paths merge into the gas-liquid separator 110, after the regenerator 104 (low temperature and low pressure side), flow back to the compressor 101 to complete the refrigerant circuit cycle. In this mode, the first shut-off valve SV1 and the second shut-off valve SV2 are both closed, and the battery heat exchange expansion valve EXV2 and the evaporator expansion valve EXV3 are throttled as required. In the coolant circuit, the heating circuit water pumps P1 and P2 work, the electric drive circuit water pump P4 works, and the battery circuit water pump P3 works. The opening 1-3 of the No. 1 three-way valve 3V1 is connected, the opening 1-2 of the No. 2 three-way valve 3V2 is connected, the opening 1-2 of the No. 3 three-way valve 3V3 is connected, and the opening of the No. 1 four-way valve 4V1 1-2 and 4-3 are turned on, the openings 3-4 and 2-1 of the No. 2 four-way valve 4V2 are turned on, and the openings 3-4 and 5-2 of the five-way valve 5V are turned on. In the refrigerant circuit, after the refrigerant comes out of the compressor 101 and is cooled down, it is throttled all the way through the battery heat exchange expansion valve EXV2, and then flows to the refrigerant part of the battery heat exchanger 105 after being cooled down, so as to be the refrigerant in the battery heat exchanger 105. The cooling liquid is cooled; the other path is throttled through the evaporator expansion valve EXV3, so that the condensed water is evaporated through the evaporator 106, so as to realize the cooling and cooling of the cabin. In the cooling liquid circuit, the battery 108 and the battery heat exchanger 105 form a battery circuit of the cooling liquid, and the cooling liquid in the battery heat exchanger 105 cools down the battery; the battery circuit is connected in series with the electric drive circuit and the low-temperature radiator 112: the first The cooling liquid part of the first air cooler 102A and the cooling liquid part of the second air cooler 102B form a circuit with the electric drive assembly 109 and the low temperature radiator 112 , and the low temperature radiator 112 dissipates the heat of the circuit.

FIG. 8 shows a sixth mode formed by the vehicle heat pump air conditioning system of the present invention, which is to cool the battery to achieve battery cooling. The dotted lines in the figure represent the flow paths of the refrigerant in the refrigerant circuit and the cooling liquid in the cooling liquid circuit. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in turn (where heat exchange is completed; at this time, the heating circuit water pump P1 in the cooling liquid circuit) and P2), electronic expansion valve EXV1 (full open state), outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side), check valve 1CV, battery heat exchange expansion valve EXV2 (throttle state), the battery heat exchanger 105, the gas-liquid separator 110, the regenerator 104 (low temperature and low pressure side), and finally flow back to the compressor 101 to complete the refrigerant circuit cycle. In this mode, the first shut-off valve SV1, the second shut-off valve SV2, and the evaporator expansion valve EXV3 are all closed, and the battery heat exchange expansion valve EXV2 is throttled as needed. In the coolant circuit, the heating circuit water pumps P1 and P2 work, the electric drive circuit water pump P4 works, and the battery circuit water pump P3 works. The opening 1-3 of the No. 1 three-way valve 3V1 is connected, the opening 1-2 of the No. 2 three-way valve 3V2 is connected, the opening 1-2 of the No. 3 three-way valve 3V3 is connected, and the opening of the No. 1 four-way valve 4V1 1-2 and 4-3 are turned on, the openings 3-4 and 2-1 of the No. 2 four-way valve 4V2 are turned on, and the openings 3-4 and 5-2 of the five-way valve 5V are turned on. In the refrigerant circuit, after the refrigerant comes out of the compressor 101 and is cooled down, it is throttled through the battery heat exchange expansion valve EXV2, and then flows to the refrigerant part of the battery heat exchanger 105 after cooling down, so as to cool the battery heat exchanger 105 Liquid cooling. In the coolant circuit, the battery 108 and the battery heat exchanger 105 form a battery circuit of the coolant, and the cooled coolant in the battery heat exchanger 105 cools the battery; the battery circuit is connected in series with the electric drive circuit and the low-temperature radiator: the first The cooling liquid part of the air cooler 102A and the cooling liquid part of the second air cooler 102B form a circuit with the electric drive assembly 109 and the low temperature radiator 112 , and the low temperature radiator 112 dissipates the heat of the circuit.

In another embodiment exemplified by FIG. 7 or FIG. 8 , the maximum cooling mode of the battery is formed. In this mode, in the refrigerant circuit, one or two air coolers (ie the first air cooler or the second air cooler) can be selected to turn on the heat exchange mode, that is, only one of the multiple air coolers can be turned on. The heating water pumps corresponding to some air coolers, or the heating circuit water pumps corresponding to all air coolers are turned on to complete the heat exchange between the refrigerant and the cooling liquid. It can be seen that the present invention adopts two or more air coolers, and can flexibly and conveniently adjust and match a suitable number of air coolers as required, thereby realizing a low energy consumption and high efficiency air conditioning method. In addition, the solution of the present invention preferably adopts carbon dioxide as the refrigerant, so as to realize the green environmental protection of the air conditioner of the new energy vehicle as a whole.

FIG. 9 shows a seventh mode formed by the vehicle heat pump air conditioning system of the present invention, and this mode is vehicle cabin heating and dehumidification. The dotted line in the figure represents the flow path of the refrigerant in the refrigerant circuit; the dashed-dotted line and the dashed-two-dotted line both represent the cooling liquid path in the cooling liquid circuit, wherein the dashed-dotted line represents the first warm core 107A and the first air cooler The series circuit formed by the cooling liquid part of 102A; the double-dot chain line represents the series circuit formed by the second warm core 107B and the cooling liquid part of the second air cooler 102B. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in turn (where heat exchange is completed; at this time, the heating circuit water pump in the cooling liquid circuit P1 and P2 work), electronic expansion valve EXV1 (throttle state), outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side), check valve 1CV, evaporator expansion valve EXV3 (throttle state) state), the evaporator 106, the gas-liquid separator 110, the regenerator 104 (low temperature and low pressure side), and finally flow back to the compressor 101 to complete the refrigerant circuit cycle. In this mode, the first shut-off valve SV1, the second shut-off valve SV2, and the battery heat exchange expansion valve EXV2 are all closed, and EXV1 and EXV3 are throttled as needed. In the cooling liquid circuit, the heating circuit water pumps P1 and P2 work, and the electric drive circuit water pump P4 and the battery circuit water pump P3 do not work. The opening 1-2 of the No. 1 three-way valve 3V1 is connected, the opening 1-3 of the No. 2 three-way valve 3V2 is connected, the opening 1-3 of the No. 3 three-way valve 3V3 is connected, and the opening of the No. 1 four-way valve 4V1 1-4 and 2-3 are turned on, the openings 1-4 and 2-3 of the No. 2 four-way valve 4V2 are turned on, and the five-way valve 5V is turned on according to the needs of the electric drive battery. In this mode, the first warm core 107A and the second warm core 107B are respectively connected in series with the cooling liquid part of the first air cooler 102A and the cooling liquid part of the second air cooler 102B, thereby heating the vehicle cabin. In the refrigerant circuit, after the refrigerant is discharged from the compressor 101 and cooled down, the condensed water is collected by the steam heat exchanger 111 and evaporated. So as to achieve the purpose of dehumidification.

FIG. 10 shows the eighth mode formed by the vehicle heat pump air conditioning system of the present invention, which is the deicing of the battery heat exchanger. The dotted lines in the figure represent the flow paths of the refrigerant in the refrigerant circuit and the cooling liquid in the cooling liquid circuit. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in sequence (where only heat exchange is not completed; Heating pumps P1 and P2 do not work), electronic expansion valve EXV1 (fully open), outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side), check valve 1CV (fully open), The battery heat exchange expansion valve EXV2 (throttling state), the battery heat exchanger 105, the gas-liquid separator 110, the regenerator 104 (low temperature and low pressure side), and finally flow back to the compressor 101 to complete the refrigerant circuit cycle. In this mode, the first shut-off valve SV1, the second shut-off valve SV2, and the evaporator expansion valve EXV3 are all closed, and the battery heat exchange expansion valve EXV2 is throttled as needed. In the coolant circuit, only the battery circuit water pump P3 works, and the heating circuit water pumps P1, P2 and the electric drive circuit water pump P4 do not work. In this mode, the waste heat generated by the battery 108 can be used to de-icing the battery heat exchanger to realize waste heat utilization.

FIG. 11 shows a ninth mode formed by the vehicle heat pump air conditioning system of the present invention, which is the natural heat dissipation of the battery. The dotted line in the figure represents the flow path of the coolant in the coolant circuit. In this mode, the refrigerant circuit does not work, and the low temperature radiator 112 (with the electronic fan 113 ) is used to dissipate heat from the battery circuit. In the cooling liquid circuit, the heating circuit water pumps P1 and P2 do not work, the electric drive circuit water pump P4 and the battery circuit water pump P3 work, and the electric drive circuit is connected in series with the battery circuit. The No. 1 four-way valve 4V1 has the outlet 1 in and 4 out, and the five-way valve 5V has the outlet 5 in and 4 out, and 3 in and 2 out. This mode is especially suitable for autumn and winter when the ambient temperature is below 20°C. When the battery needs to dissipate heat, the outside ambient temperature is relatively low, and the electronic fan 113 and the low-temperature radiator 112 can be used to achieve natural heat dissipation.

FIG. 12 shows the tenth mode formed by the vehicle heat pump air conditioning system of the present invention, which is to recover the waste heat to keep the battery warm. The dotted line in the figure represents the flow path of the coolant in the coolant circuit. In this mode, the refrigerant circuit does not work, and the electric drive circuit is used to dissipate heat to keep the battery warm. In the coolant circuit, the heating circuit water pumps P1 and P2 do not work, the electric drive circuit water pump P4 and the battery circuit water pump P3 work, and the electric drive circuit is connected in series with the battery circuit. The No. 1 four-way valve 4CV1 is 1 in and 4 out, and the five-way valve 5V is 1 in and 4 out, and 3 in and 2 out.

FIG. 13 shows an eleventh mode formed by the vehicle heat pump air conditioning system of the present invention, which heats the vehicle cabin through waste heat recovery. The dotted line in the figure represents the flow path of the refrigerant in the refrigerant circuit and the flow path of the cooling liquid in the electric drive circuit; the dashed-dotted line represents the series circuit formed by the first warm core 107A and the cooling liquid part of the first air cooler 102A; The dashed-two dotted line indicates a series circuit formed by the second warm core 107B, the cooling liquid portion of the second air cooler 102B, and the battery circuit. In the refrigerant circuit, the refrigerant comes out from the compressor 101 (for example, an electric compressor), and passes through the first air cooler 102A and the second air cooler 102B in turn (where heat exchange is completed; at this time, the heating circuit water pump P1 in the cooling liquid circuit) and P2), electronic expansion valve EXV1, outdoor radiator 103, steam heat exchanger 111, regenerator 104 (high temperature and high pressure side), check valve 1CV, battery heat exchange expansion valve EXV2 (throttle state), battery exchange Heater 105, gas-liquid separator 110, regenerator 104 (low temperature and low pressure side), and finally flow back to compressor 101 to complete the refrigerant circuit cycle. In this mode, the first shut-off valve SV1, the second shut-off valve SV2, and the evaporator expansion valve EXV3 are all closed, and the battery heat exchange expansion valve EXV2 is throttled as needed. In the coolant circuit, the heating circuit water pumps P1, P2, the electric drive circuit water pump P4 and the battery circuit water pump P3 all work. The opening 1-2 of the No. 1 three-way valve 3V1 is connected, the opening 1-3 of the No. 2 three-way valve 3V2 is connected, the opening 1-2 of the No. 3 three-way valve 3V3 is connected, and the opening of the No. 1 four-way valve 4V1 1-4, 2-3 are connected, the No. 2 four-way valve 4V2 is connected by 1-4, 2-3 is connected, the openings 1-2 and 3-4 of the five-way valve 5V are connected, or 2-3, 1-4 are on. In this mode, the heating source of the cabin comes from the heat in the coolant exchanged by the air cooler on the one hand, and conducts it to the first warm core 107A and the second warm core 107B, for example, the first warm core 107A and the first warm core 107A The cooling liquid part of the air cooler 102A is connected in series, and the second warm core 107B is connected in series with the cooling liquid part of the second air cooler 102B; on the other hand, the residual heat of the battery and the electric drive circuit can also provide a certain amount of heating for the cabin. heat to save energy. For example, when the second warm core 107B is connected in series with the cooling liquid part, the battery circuit, and the electric drive circuit of the second air cooler 102B, the heat generated by the battery and the electric drive assembly can also be transferred to the second warm core 107B to realize Cabin heating.

Figures 3 to 13 show the structure of an embodiment of the heat pump air conditioning system according to the present invention shown in Figure 1, which are applicable to several air conditioning modes, but are not limited to the examples listed above. Similarly, the air conditioning modes listed above can also be applied to other structures that do not deviate from the concept of the present invention, such as the structure shown in FIG. 2 . Furthermore, variations are possible in the selection and arrangement of valve type components, pump type components, and heat exchanger types without departing from the inventive concept.

Figures 14-15 show two other embodiments of selection and arrangement of valve components under the concept of the present invention. FIG. 14 shows the structure of another embodiment of the vehicle heat pump air conditioning system of the present invention. The system includes a compressor 201, a first air cooler 202A, a second air cooler 202B, a first warm core 207A, and a second warm core 207B, battery heat exchanger 205, outdoor radiator 203, steam heat exchanger 211, evaporator 206, battery 208, electric drive assembly 209, low temperature radiator 212, electronic fan 213; also includes the same functions and Layout identical pump components. Different from the above embodiments, the regenerator 210 here has a built-in gas-liquid separator. In addition, the multi-port valve assembly can include an eight-port valve 8V and a three-port valve 3V arranged as shown in Figure 14, and can also realize the activation and switching of the heating circuit, the electric drive circuit and the battery circuit in the cooling liquid circuit.

FIG. 15 shows the structure of another embodiment of the vehicle heat pump air conditioning system of the present invention. The difference from Fig. 14 is that the eight-way valve 8V is replaced with the first five-way valve 5V1 and the second five-way valve 5V2. According to the arrangement shown in Fig. 15, the cooling circuit, the heating circuit and the electric drive circuit can also be realized. and activation and switching of the battery circuit. In addition to the arrangement of the multi-port valve assembly shown in the above embodiments, other arrangements may also be adopted without departing from the concept of the present invention.

It can be understood that the air conditioning modes used in FIGS. 3 to 13 are also applicable to the structures of the embodiments shown in FIGS. 14 and 15 .

The above describes a vehicle heat pump air conditioning system provided by an embodiment of the present invention. Correspondingly, an embodiment of the present invention also provides a vehicle, especially a new energy vehicle and/or an electric vehicle, the vehicle includes a body, and the vehicle heat pump air conditioning system shown in FIGS. 1-15 is mounted on the body.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these Modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (11)

1. A vehicle air conditioning system, comprising: a refrigerant circuit and a cooling liquid circuit, wherein, The refrigerant circuit flows through at least two air coolers connected in series, and the circuit at the outflow end of the at least two air coolers includes a battery cooling circuit and a cabin cooling circuit, the battery cooling circuit passing through the battery of the vehicle a heat exchanger, the cabin cooling circuit passing through the evaporative tank of the vehicle; The coolant circuit includes a heating circuit and a battery circuit, wherein the battery circuit includes the battery heat exchanger and a battery, and the heating circuit flows through the at least two air coolers and the evaporative tank of the vehicle to The vehicle heats the vehicle; the battery circuit connects an air cooler of the at least two air coolers and the vehicle evaporative tank to supply heat to the battery. 2. The system of claim 1, wherein the evaporation box has an evaporator, a first warm core connected to a portion of the at least two air coolers, and a first warm core connected to a portion of the at least two air coolers. Another part of the air coolers is connected to the second warm core, the battery circuit is connected to the second warm core in the vehicle evaporation box, and the vehicle cabin cooling circuit flows through the evaporator. 3. The system of claim 2, wherein the heating temperature of the first warm core is higher than the heating temperature of the second warm core. 4 . The system of claim 3 , wherein the battery circuit is selectively connected to the second warm core through a multi-way valve assembly to conduct heat collected in the battery circuit to the second warm core. 5 . Describe the second warm core. 5. The system of claim 4, wherein the coolant circuit further comprises an electric drive circuit, wherein the electric drive circuit includes an electric drive assembly powered by the battery for powering the vehicle, The electric drive circuit and the battery circuit are selectively conducted through a multi-way valve assembly to conduct heat collected in the electric drive circuit to the battery. 6 . The system according to claim 5 , wherein the cooling liquid circuit further includes a heat dissipation circuit, and the heat dissipation circuit and the battery circuit are selectively conducted through the multi-port valve assembly to connect the radiator to the battery. 7 . The heat collected in the battery circuit is directed to the heat dissipation circuit, and/or The heat dissipation circuit and at least part of the air coolers in the at least two air coolers are selectively conducted through the multi-way valve assembly, so as to connect the at least part of the air coolers in the cooling liquid circuit The collected heat is directed to the cooling circuit. 7 . The system according to claim 1 , wherein a regulating valve assembly for switching the supply of refrigerant to the battery cooling circuit and/or the vehicle cabin cooling circuit is configured in the refrigerant circuit. 8 . 8 . The system according to claim 1 , wherein an outdoor radiator, a steam heat exchanger and a regenerator are arranged in sequence in the refrigerant circuit, and the battery cooling circuit and the cabin cooling circuit are located in the The circuit at the outflow end of the regenerator, the steam heat exchanger includes a condensed water storage device, an atomization device and an evaporation device. 9. The system of any one of claims 1-8, wherein the system uses carbon dioxide as a refrigerant. 10. A control method for a vehicle air conditioning system, used in the vehicle air conditioning system according to any one of claims 1-9, characterized in that it at least comprises the following steps: In the refrigerant circuit, the refrigerant is controlled to flow through at least two air coolers connected in series for heat exchange; In the cooling liquid circuit, the cooling liquid is controlled to flow through the at least two air coolers and the heating circuit after heat exchange to provide heat for the vehicle; and/or the cooling liquid flows through the at least two heat exchanged air coolers. One of the air coolers and the battery circuit to supply heat to the battery. 11. A vehicle, characterized by comprising the vehicle air conditioning system according to any one of claims 1-9.

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