CN113147320B - Heat pump automobile air conditioning system - Google Patents
Heat pump automobile air conditioning system Download PDFInfo
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- CN113147320B CN113147320B CN202110443097.3A CN202110443097A CN113147320B CN 113147320 B CN113147320 B CN 113147320B CN 202110443097 A CN202110443097 A CN 202110443097A CN 113147320 B CN113147320 B CN 113147320B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
- B60H1/32284—Cooling devices using compression characterised by refrigerant circuit configurations comprising two or more secondary circuits, e.g. at evaporator and condenser side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00321—Heat exchangers for air-conditioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2268—Constructional features
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- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to the technical field of automobile air conditioners, in particular to a heat pump automobile air conditioning system, which comprises: a multi-functional multi-channel control valve; the water pump I, the motor module, the electromagnetic three-way valve II, the plate heat exchanger I and the motor radiator are sequentially connected, and the electromagnetic four-way valve I forms a communication loop; the compressor, the plate heat exchanger II, the multifunctional multi-channel control valve, the external heat exchanger, the electromagnetic three-way valve I, the heat exchange assembly and the gas-liquid separator which are sequentially connected form a communicating loop; the water pump II, the battery heat exchange module, the heat exchange assembly, the electromagnetic three-way valve IV and the plate heat exchanger III which are connected in sequence form a communicating loop; the integrated heater, the electromagnetic three-way valve III, the radiator or the plate heat exchanger III in the vehicle and the multi-channel control valve which are connected in sequence form a communication loop; the beneficial effects are that: the multifunctional multi-channel control valve, the multi-channel control valve and the integrated heater are arranged, so that the number of joints and parts of the system is effectively reduced, and the compactness, safety and reliability of the system are effectively improved.
Description
Technical Field
The invention relates to the technical field of automobile air conditioners, in particular to a heat pump automobile air conditioning system.
Background
In the field of automobiles, in order to reduce environmental pollution, large-scale development of electric automobiles has become a trend, and realization of large-scale application of new energy automobiles and overall improvement of the quality and performance of the whole electric automobiles are one of the mainstream directions of current development.
The pure electric vehicle is not provided with a fuel engine, an automobile air conditioning system can not be directly driven by the engine except for a compressor, heating in winter can not be carried out by continuously utilizing the waste heat of the engine, the conventional electric vehicle mostly adopts a PTC electric heater for direct heating, the efficiency is low, the endurance mileage of the electric vehicle is obviously reduced, and the pure electric vehicle is not in line with the aims of energy conservation and emission reduction in the long run. Therefore, research on a heat pump air conditioning system with relatively high energy efficiency is of great significance to the technical development of electric vehicles.
In the case of a conventional automotive air conditioning system at an ultra-low temperature, the performance of a heat pump air conditioner is significantly reduced.
Disclosure of Invention
The invention aims to provide a heat pump automobile air conditioning system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a heat pump automotive air conditioning system comprising:
the water pump I, the motor module, the electromagnetic three-way valve II, the plate heat exchanger I, the motor radiator and the electromagnetic four-way valve I which are sequentially connected form a communication loop;
the compressor, the plate heat exchanger II, the multifunctional multi-channel control valve, the external heat exchanger, the electromagnetic three-way valve I, the heat exchange assembly and the gas-liquid separator which are sequentially connected form a communicating loop;
the water pump II, the battery heat exchange module, the heat exchange assembly, the electromagnetic three-way valve IV and the plate heat exchanger III which are connected in sequence form a communicating loop;
the integrated heater, the electromagnetic three-way valve III, the radiator or the plate heat exchanger III in the vehicle and the multi-channel control valve which are connected in sequence form a communication loop;
when the air conditioning system is in a low-temperature working condition, the multi-channel control valve and the multifunctional multi-channel control valve are switched to connect a part of communicated loops, so that heat generated by the motor module is supplied to a radiator or an integrated heater in the vehicle through the plate heat exchanger I and the plate heat exchanger II.
As a further scheme of the invention: the heat exchange assembly comprises a battery radiator and a plate type heat exchanger IV.
As a still further scheme of the invention: and electronic expansion valves are arranged in part or all of the channels of the multifunctional multi-channel control valve and are used for throttling and pressure regulating.
As a still further scheme of the invention: further comprising:
the water pump I, the motor module, the electromagnetic three-way valve II, the electromagnetic four-way valve II, the motor radiator and the electromagnetic four-way valve I which are sequentially connected form a communicating loop;
the water pump I, the motor module, the electromagnetic three-way valve II, the electromagnetic four-way valve II and the electromagnetic four-way valve I which are connected in sequence form a communication loop;
the compressor, the plate heat exchanger II, the multifunctional multi-channel control valve, the external heat exchanger or the plate heat exchanger I and the gas-liquid separator which are connected in sequence form a communication loop;
the integrated heater, the electromagnetic three-way valve III, the in-vehicle radiator, the multi-channel control valve, the plate heat exchanger II and the multifunctional multi-channel control valve which are sequentially connected form a communicating loop.
As a still further scheme of the invention: the motor radiator, the evaporator and the battery radiator are respectively provided with a heat radiating part for assisting the motor radiator, the evaporator and the battery radiator to radiate heat; the heat dissipation part comprises a motor heat dissipation fan, an in-vehicle heat dissipation fan and a battery heat dissipation fan.
As a still further scheme of the invention: the device also comprises expansion kettles, wherein one expansion kettle is connected with a connecting pipeline of the integrated heater and the multi-channel control valve, and is simultaneously connected with a connecting pipeline of the electromagnetic three-way valve III and the plate heat exchanger III; and the other expansion kettle is connected with the electromagnetic four-way valve I and is also connected with a motor radiator.
As a still further scheme of the invention: when the air conditioning system is in an in-vehicle refrigeration and battery cooling mode, the multifunctional multichannel control valve, the electromagnetic three-way valve I and the electromagnetic three-way valve IV are adjusted to enable the compressor to circularly convey the refrigerant to sequentially pass through the plate heat exchanger II, the multifunctional multichannel control valve, the heat exchanger outside the vehicle, the electromagnetic three-way valve I, the heat exchange assembly, the in-vehicle evaporator and the gas-liquid separator, and the water pump II circularly conveys the battery cooling liquid to sequentially pass through the battery heat exchange module, the plate heat exchanger IV, the electromagnetic three-way valve IV and the plate heat exchanger III;
when the air conditioning system is in a PTC in-vehicle heating mode, adjusting an electromagnetic three-way valve III and a multi-channel control valve to enable the integrated heater to circularly convey cooling liquid to sequentially pass through the electromagnetic three-way valve III, an in-vehicle radiator and the multi-channel control valve;
when the air conditioning system is in a PTC battery preheating mode, adjusting an electromagnetic three-way valve IV, an electromagnetic three-way valve III and a multi-channel control valve to enable the integrated heater to circularly convey cooling liquid to sequentially pass through the electromagnetic three-way valve III, the plate type heat exchanger III and the multi-channel control valve, and meanwhile, circularly conveying the cooling liquid of the battery to sequentially pass through a battery heat exchange module, the plate type heat exchanger IV, the electromagnetic three-way valve IV and the plate type heat exchanger III by a water pump II;
when the air conditioning system is in a heating mode and a PTC heat compensation mode in the first heat pump truck, the multifunctional multichannel control valve, the electromagnetic three-way valve III and the multichannel control valve are adjusted to enable the compressor to circularly convey the refrigerant to sequentially pass through the plate type heat exchanger II, the multifunctional multichannel control valve, the heat exchanger outside the truck and the gas-liquid separator; the integrated heater circularly conveys cooling liquid to sequentially pass through the electromagnetic three-way valve III, the in-vehicle radiator, the multi-channel control valve, the plate heat exchanger II and the multi-channel control valve;
when the air conditioning system is in a heating mode and a PTC heat supplementing mode in the second heat pump truck, adjusting the electromagnetic three-way valve II, the multifunctional multi-channel control valve, the electromagnetic four-way valve I and the electromagnetic three-way valve III to enable the water pump I to circularly convey the motor cooling liquid to sequentially pass through the motor module, the electromagnetic three-way valve II and the electromagnetic four-way valve I; the compressor circularly conveys the refrigerant to sequentially pass through the plate heat exchanger II, the multifunctional multi-channel control valve, the plate heat exchanger I and the gas-liquid separator; the integrated heater circularly conveys cooling liquid to sequentially pass through the electromagnetic three-way valve III, the in-vehicle radiator, the multi-channel control valve, the plate heat exchanger II and the multi-channel control valve;
when the air conditioning system is in a second defrosting mode, the multifunctional multi-channel control valve, the electromagnetic three-way valve I, the electromagnetic three-way valve III, the multi-channel control valve and the electromagnetic three-way valve IV are adjusted to enable the compressor to circularly convey the refrigerant to sequentially pass through the plate heat exchanger II, the multifunctional multi-channel control valve, the external heat exchanger, the electromagnetic three-way valve I, the plate heat exchanger IV and the gas-liquid separator; the integrated heater circularly conveys cooling liquid to sequentially pass through the electromagnetic three-way valve III, the plate heat exchanger III and the multi-channel control valve; and the water pump II circularly conveys the battery cooling liquid to pass through the battery heat exchange module, the plate type heat exchanger IV, the electromagnetic three-way valve IV and the plate type heat exchanger III in sequence.
Compared with the prior art, the invention has the beneficial effects that: the multifunctional multi-channel control valve, the multi-channel control valve and the integrated heater are integrated components with multiple functions, so that the number of joints and components of the system is effectively reduced, and the compactness, safety and reliability of the system are effectively improved; various working modes of the system are met; the internal heating of the vehicle is realized by using the waste heat of the motor as a low-temperature heat source under the low-temperature working condition, and the problems that the exhaust temperature of the compressor is too high and the heating quantity is obviously insufficient when the heat pump type automobile air conditioning system operates under the low-temperature working condition are solved.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump automobile air conditioning system according to an embodiment of the present invention.
Fig. 2 is a schematic view of an operating state of a cooling mode in a vehicle according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating the operation states of the cooling mode and the battery cooling mode in the vehicle according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an operating state of a first battery cooling-only mode, i.e., an air conditioner refrigerant cooling operating state, and an operating state of a first defrosting mode in an embodiment of the present invention.
Fig. 5 is a schematic diagram of a second battery individual cooling mode, i.e., an ambient cooling operation state, according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of the cooling mode operation of the motor according to an embodiment of the present invention.
Fig. 7 is a schematic view of the operating state of the heating mode in the PTC vehicle according to an embodiment of the present invention.
Fig. 8 is a schematic diagram illustrating a preheating mode operation state of the PTC battery according to an embodiment of the present invention.
Fig. 9 is a schematic view of a heating mode and a PTC heating operation state in the first heat pump vehicle according to an embodiment of the present invention.
Fig. 10 is a schematic diagram of the heating mode (residual heat of the motor) and the PTC heating operation state in the second heat pump vehicle according to an embodiment of the present invention.
Fig. 11 is a schematic diagram of the second defrost mode operation in accordance with an embodiment of the present invention.
In the drawings: 1. an electromagnetic four-way valve I, 2, a water pump I, 3, a charging system, 4, a direct-current power converter, 5, a motor control system, 6, a motor, 7, an electromagnetic three-way valve I, 8, an external heat exchanger, 9, a motor radiator, 10, a motor radiator fan, 11, an electromagnetic four-way valve II, 12, a plate heat exchanger I, 13, a multifunctional multi-channel control valve, 14, a plate heat exchanger II, 15, a compressor, 16, a gas-liquid separator, 17, an electromagnetic three-way valve II, 18, an electronic expansion valve I, 19 with a cut-off function, an electronic expansion valve II, 20, an electromagnetic three-way valve III, 21, a water pump PTC integrated heater, 22, an internal heat radiator, 23, an evaporator, 24, an internal radiator fan, 25, a multi-channel control valve, 26, a plate heat exchanger III, 27, a water pump II, 28, a battery heat exchange module, 29, an electromagnetic three-way valve IV, 30. plate heat exchanger IV, 31, battery radiator, 32, battery radiator fan, 33, expansion kettle I, 34, expansion kettle II.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Referring to fig. 1, in an embodiment of the present invention, a heat pump automobile air conditioning system includes a four-way solenoid valve I1, a water pump I2, a charging system 3, a dc power converter 4, a motor control system 5, a motor 6, a three-way solenoid valve I7, an external heat exchanger 8, a motor radiator 9, a motor radiator fan 10, a four-way solenoid valve II11, a plate heat exchanger I12, a multi-functional multi-channel control valve 13, a plate heat exchanger II14, a compressor 15, a gas-liquid separator 16, a three-way solenoid valve II17, an electronic expansion valve I18 with a cut-off function, an electronic expansion valve II19 with a cut-off function, a three-way solenoid valve III20, an integrated heater, an internal radiator 22, an evaporator 23, an internal heat radiator fan 24, a multi-channel control valve 25, a plate heat exchanger III26, a water pump II27, a battery heat exchange module 28, an electromagnetic three-way solenoid valve IV29, a plate heat exchanger IV30, a battery radiator 31, a battery radiator, Battery radiator fan 32, expansion pot I33 and expansion pot II 34.
Wherein, electronic expansion valves are arranged in partial channels of the multifunctional multi-channel control valve 13. The integrated heater adopts a water pump PTC integrated heater 21; the two electronic expansion valves are an electronic expansion valve I18 with a stop function and an electronic expansion valve II19 with a stop function.
The multifunctional multi-channel control valve 13 has three working modes:
ab communication: the plate heat exchanger II14 and the external heat exchanger 8 are connected;
ac communication: the electronic expansion valve is arranged in the heat exchanger, the throttling function is realized, and the plate type heat exchanger II14 and the heat exchanger 8 outside the vehicle are connected;
ad communication: the electronic expansion valve is arranged in the heat exchanger, has a throttling function and is connected with the plate heat exchanger II14 and the plate heat exchanger I12;
this embodiment makes vehicle air conditioning system realize multiple mode through switching corresponding valve, and its specific mode is as follows:
1. an in-vehicle refrigeration mode: the system comprises a compressor 15, a plate heat exchanger II14, a multifunctional multi-channel control valve 13, an external heat exchanger 8, an electromagnetic three-way valve I7, an electronic expansion valve II19 with a stop function, an evaporator 23 and a gas-liquid separator 16 which are connected in sequence to form a communication loop; as shown in fig. 2, the refrigerant compressed by the compressor 15 at high temperature and high pressure passes through the plate heat exchanger II14, then enters through the port a of the multi-function multi-channel control valve 13, flows out through the port b of the multi-function multi-channel control valve 13 (a → b is connected only as a pipeline), then enters the exterior heat exchanger 8 to release heat to the environment to become a supercooled liquid state, then enters through the port c of the electromagnetic three-way valve I7, flows out through the port b of the electromagnetic three-way valve I7, then changes into a refrigerant at low pressure and low temperature through throttling of the electronic expansion valve II9 with a cut-off function, enters the evaporator 23, the refrigerant absorbs heat of air, the temperature of the air itself is reduced, then enters the gas-liquid separator 16, and then returns to the compressor 15, thereby implementing the refrigeration cycle in the vehicle. In this mode, the electronic expansion valve I8 with a cut-off function is in a closed state, the multi-function multi-channel control valve 13 is in an ab-communication state, and ac and ad are in a closed state.
2. In-vehicle cooling and battery cooling modes: the system comprises a compressor 15, a plate heat exchanger II14, a multifunctional multi-channel control valve 13, an external heat exchanger 8 and an electromagnetic three-way valve I7 which are connected in sequence, wherein a port b of the electromagnetic three-way valve I7 is divided into two paths which are respectively connected with an electronic expansion valve II19 and an evaporator 23 with a cut-off function, an electronic expansion valve I18 with a cut-off function and a plate heat exchanger IV 30; then connected with a gas-liquid separator 16 to form a communication loop; the water pump II27, the battery heat exchange module 28, the plate heat exchanger IV30, the electromagnetic three-way valve IV29 and the plate heat exchanger III26 which are connected in sequence form a communicating loop; as shown in fig. 3, the high-temperature and high-pressure refrigerant compressed by the compressor 15 passes through the plate heat exchanger II14, enters through the port a of the multi-functional multi-channel control valve 13, flows out through the port b (a → b is only connected as a pipeline), enters the exterior heat exchanger 8 to release heat to the environment to become a supercooled liquid, enters through the port c of the electromagnetic three-way valve I7, flows out through the port b of the electromagnetic three-way valve I7, a part of the refrigerant enters the electronic expansion valve II19 with a stop function to be throttled to become a low-pressure and low-temperature refrigerant, enters the evaporator 23, the refrigerant absorbs heat of air, the temperature of the air is reduced, then enters the gas-liquid separator 16, and then returns to the compressor 15, so as to realize an in-vehicle refrigeration cycle; another part of the refrigerant enters an electronic expansion valve I18 with a stopping function to be throttled into low-pressure and low-temperature refrigerant, enters a plate heat exchanger IV30 to exchange heat with battery cooling liquid in a battery cooling system, then enters a gas-liquid separator 16, and then returns to the compressor 15. The battery cooling liquid flows through the battery heat exchange module 28 under the action of the water pump II27, absorbs heat on the surface of the battery, enters the plate type heat exchanger IV30, transfers the heat to a refrigerant to realize cooling, then enters through a port b of the electromagnetic three-way valve IV29, flows out through a port c of the electromagnetic three-way valve IV29, flows through the plate type heat exchanger III26, and then returns to the water pump II27 to realize battery cooling circulation. In this mode, the multi-function multi-channel control valve 13 is in an ab-communication state; the electromagnetic three-way valve IV29 is in a bc communication state, and ac is in a closed state.
3.1, first battery cooling only mode (air conditioner refrigerant cooling): the system comprises a compressor 15, a plate heat exchanger II14, a multifunctional multi-channel control valve 13, an external heat exchanger 8, an electromagnetic three-way valve I7, an electronic expansion valve I18 with a stop function, a plate heat exchanger IV30 and a gas-liquid separator 16 which are connected in sequence to form a communication loop; the water pump II27, the battery heat exchange module 28, the plate heat exchanger IV30, the electromagnetic three-way valve IV29 and the plate heat exchanger III26 which are connected in sequence form a communicating loop; as shown in fig. 4, the high-temperature and high-pressure refrigerant compressed by the compressor 15 passes through the plate heat exchanger II14, then enters through the port a of the multi-function multi-channel control valve 13, flows out through the port b of the multi-function multi-channel control valve 13 (a → b is connected only as a pipeline), then enters the exterior heat exchanger 8 to release heat to the environment to become a supercooled liquid, then enters through the port c of the electromagnetic three-way valve I7, flows out through the port b of the electromagnetic three-way valve I7, then enters the electronic expansion valve I18 with a cut-off function to be throttled to become a low-pressure and low-temperature refrigerant, enters the plate heat exchanger IV30 to exchange heat with the battery coolant in the battery cooling system, then enters the gas-liquid separator 16, and then returns to the compressor 15. The battery cooling liquid flows through the battery heat exchange module 28 under the action of the water pump II27, absorbs heat on the surface of the battery, enters the plate type heat exchanger IV30, transfers the heat to a refrigerant to realize cooling, then enters through a port b of the electromagnetic three-way valve IV29, flows out through a port c of the electromagnetic three-way valve IV29, flows through the plate type heat exchanger III26, and then returns to the water pump II27 to realize battery cooling circulation. In this mode, the electronic expansion valve II19 with a cut-off function is in a closed state; the multifunctional multi-channel control valve 13 is in an ab communication state; the electromagnetic three-way valve IV29 is in a bc communication state, and ac is in a closed state.
3.2, second battery cooling only mode (ambient air cooling): the water pump II27, the battery heat exchange module 28, the battery radiator 31, the electromagnetic three-way valve IV29 and the plate heat exchanger III26 which are connected in sequence form a communication loop; as shown in fig. 5, under the condition of low ambient temperature, the battery coolant flows through the battery heat exchange module 28 under the action of the water pump II27, absorbs heat on the surface of the battery, enters the battery radiator 31, and the air cools the battery radiator 31 under the action of the battery cooling fan 32, and the cooled battery coolant is in a liquid state, then enters through the port a of the electromagnetic three-way valve IV29, flows out through the port c of the electromagnetic three-way valve IV29, flows through the plate heat exchanger III26, and then returns to the water pump II27, thereby implementing a battery cooling cycle.
4. A motor cooling mode: the water pump I2, the motor module, the electromagnetic three-way valve II17, the electromagnetic four-way valve II11, the motor radiator 9 and the electromagnetic four-way valve I1 which are connected in sequence form a communication loop; as shown in fig. 6, a motor circulating liquid (motor coolant) flows through a motor module under the action of a water pump I2, the motor module includes a charging system 3, a dc power converter 4, a motor control system 5, and a motor 6, which are connected in sequence, then enters through a port b of an electromagnetic three-way valve II17, flows out through a port c of an electromagnetic three-way valve II17, enters through a port b of an electromagnetic four-way valve II11, flows out through a port c of an electromagnetic four-way valve II11, then enters a motor radiator 9, the air cools the motor radiator 9 under the action of a motor cooling fan 10, the cooled liquid then enters through a port c of an electromagnetic four-way valve I1, flows out through a port a of the electromagnetic four-way valve I1, and then returns to a water pump I2, thereby implementing a motor cooling cycle.
5. PTC in-vehicle heating mode: the water pump PTC integrated heater 21, the electromagnetic three-way valve III20, the radiator 22 in the vehicle and the multi-channel control valve 25 which are connected in sequence form a communication loop; as shown in fig. 7, the PTC heating circulation liquid flows through the water pump PTC integrated heater 21 as a coolant, absorbs heat, enters through the port c of the electromagnetic three-way valve III20, flows out through the port b of the electromagnetic three-way valve III20, enters the vehicle interior radiator 22, cools the vehicle interior radiator 22 by the air under the action of the vehicle interior cooling fan 24, increases the temperature of the air itself, and the cooled liquid enters through the port a of the multi-channel control valve 25 and flows out through the port d of the multi-channel control valve 25, and then returns to the water pump PTC integrated heater 21, thereby realizing the PTC vehicle interior heating circulation.
6. PTC battery preheating mode: the system comprises a water pump PTC integrated heater 21, an electromagnetic three-way valve III20, a plate heat exchanger III26 and a multi-channel control valve 25 which are connected in sequence to form a communication loop, and a water pump II27, a battery heat exchange module 28, a plate heat exchanger IV30, an electromagnetic three-way valve IV29 and a plate heat exchanger III26 which are connected in sequence to form a communication loop; as shown in fig. 8, the PTC heating circulation fluid flows through the water pump PTC integrated heater 21, absorbs heat, enters through the port c of the electromagnetic three-way valve III20, flows out through the port a of the electromagnetic three-way valve III20, enters the plate heat exchanger III26 to exchange heat with the low-temperature cooling fluid, and then enters through the port a of the multi-channel control valve 25, flows out through the port d of the multi-channel control valve 25, and then returns to the water pump PTC integrated heater 21. Under the action of the water pump II27, the battery cooling liquid flows through the battery heat exchange module 28, transfers heat to the battery, enters the plate heat exchanger IV30, enters the battery through the port b of the electromagnetic three-way valve IV29, flows out through the port c of the electromagnetic three-way valve IV29, flows through the plate heat exchanger III26, absorbs the heat of the PTC heating circulation liquid, and then returns to the water pump II27 to realize the preheating circulation of the battery.
7. First in-vehicle heating mode: the system comprises a compressor 15, a plate heat exchanger II14, a multifunctional multi-channel control valve 13, an external heat exchanger 8, an electromagnetic three-way valve I7 and a gas-liquid separator 16 which are sequentially connected to form a communication loop, and a water pump PTC integrated heater 21, an electromagnetic three-way valve III20, an in-vehicle radiator 22, a multi-channel control valve 25, a plate heat exchanger II14 and the multi-channel control valve 25 which are sequentially connected to form the communication loop; as shown in fig. 9, the high-temperature and high-pressure refrigerant compressed by the compressor 15 exchanges heat with the low-temperature cooling liquid through the plate heat exchanger II14, becomes a supercooled liquid, then enters through the port a of the multi-function multi-channel control valve 13, flows out through the port c of the multi-function multi-channel control valve 13 (an electronic expansion valve is arranged in a channel a → c), is throttled to become a low-pressure and low-temperature refrigerant, then enters the exterior heat exchanger 8, absorbs heat of air, then enters through the port c of the electromagnetic three-way valve I7, flows out through the port a of the electromagnetic three-way valve I7, then enters the gas-liquid separator 16, and then returns to the compressor 15. The PTC heating circulating liquid flows through the water pump PTC integrated heater 21, then enters through a port c of the electromagnetic three-way valve III20, flows out through a port b of the electromagnetic three-way valve III20, then enters the in-vehicle radiator 22, air cools the in-vehicle radiator 22 under the action of the in-vehicle cooling fan 24, the temperature of the air rises, the cooled liquid enters through a port a of the multi-channel control valve 25, flows out through a port b of the multi-channel control valve 25, then passes through the plate heat exchanger II14, absorbs the heat of a refrigerant, then enters through a port c of the multi-channel control valve 25, flows out through a port d of the multi-channel control valve 25, and then returns to the water pump PTC integrated heater 21, so that the heating circulation in the heat pump vehicle is realized. In this mode, the multi-channel control valve 25 is in the ab and cd communication state and the ad closing state.
8. Heating and PTC concurrent heating mode in the first heat pump truck: when the ambient temperature is low, the water pump PTC integrated heater 21 may be started to heat the PTC heating circulating liquid, and the power of the water pump PTC integrated heater 21 may be adjusted according to the demand for heat. As shown in fig. 9, the high-temperature and high-pressure refrigerant compressed by the compressor 15 exchanges heat with the low-temperature cooling liquid through the plate heat exchanger II14, becomes a supercooled liquid, then flows out through the port c of the multi-functional multi-channel control valve 13 (an electronic expansion valve is arranged in the a → c channel), is throttled to become a low-pressure and low-temperature refrigerant, then enters the exterior heat exchanger 8, absorbs heat of air, then enters through the port c of the electromagnetic three-way valve I7, flows out through the port a of the electromagnetic three-way valve I7, then enters the gas-liquid separator 16, and then returns to the compressor 15. The PTC heating circulating liquid flows through the water pump PTC integrated heater 21 under the action of the water pump PTC integrated heater 21, absorbs heat, enters through a port c of the electromagnetic three-way valve III20, flows out through a port b of the electromagnetic three-way valve III20, enters the vehicle interior radiator 22, cools the vehicle interior radiator 22 under the action of the vehicle interior radiating fan 24, the temperature of the air rises, the cooled liquid enters through a port a of the multi-channel control valve 25, flows out through a port b of the multi-channel control valve 25, then passes through the plate type heat exchanger II14, absorbs refrigerant heat, enters through a port c of the multi-channel control valve 25, flows out through a port d of the multi-channel control valve 25, and then returns to the water pump PTC integrated heater 21, so that the first heat pump vehicle interior heating circulation is realized. In this mode, the multi-channel control valve 25 is in the ab and cd communication state and the ad closing state.
9. Heating mode (motor waste heat) in the second heat pump vehicle: the system comprises a compressor 15, a plate heat exchanger II14, a multifunctional multi-channel control valve 13, a plate heat exchanger I12 and a gas-liquid separator 16 which are sequentially connected to form a communication loop, a water pump I2, a charging system 3, a direct-current power supply converter 4, a motor control system 5, a motor 6, an electromagnetic three-way valve II17, a plate heat exchanger I12, an electromagnetic four-way valve II11 and an electromagnetic four-way valve I1 which are sequentially connected to form a communication loop, and a water pump PTC integrated heater 21, an electromagnetic three-way valve III20, an in-vehicle radiator 22, a multi-channel control valve 25, a plate heat exchanger II14 and a multi-channel control valve 25 which are sequentially connected to form a communication loop; as shown in fig. 10, the high-temperature and high-pressure refrigerant compressed by the compressor 15 exchanges heat with the low-temperature cooling liquid through the plate heat exchanger II14, becomes a supercooled liquid, then enters through the port a of the multi-function multi-channel control valve 13, flows out (a → d contains an electronic expansion valve) through the port d of the multi-function multi-channel control valve 13, is throttled to become a low-pressure and low-temperature refrigerant, then enters the plate heat exchanger I12 to absorb heat of the motor circulating liquid, then enters the gas-liquid separator 16, and then returns to the compressor 15. The PTC heating circulating liquid flows through the water pump PTC integrated heater 21, then enters through a port c of the electromagnetic three-way valve III20, flows out through a port b of the electromagnetic three-way valve III20, then enters the in-vehicle radiator 22, the air cools the in-vehicle radiator 22 under the action of the in-vehicle radiating fan 24, the temperature of the air rises, the cooled liquid enters through a port a of the multi-channel control valve 25, flows out through a port b of the multi-channel control valve 25, then passes through the plate heat exchanger II14, absorbs the heat of the refrigerant, then enters through a port c of the multi-channel control valve 25, flows out through a port d of the multi-channel control valve 25, and then returns to the water pump PTC integrated heater 21. The motor circulating liquid flows through the charging system 3, the direct-current power supply converter 4, the motor control system 5 and the motor 6 under the action of the water pump I2, then enters through a port b of the electromagnetic three-way valve II17, flows out through a port a of the electromagnetic three-way valve II17, then passes through the plate heat exchanger I12, transfers heat to a refrigerant, enters through a port a of the electromagnetic four-way valve II11, flows out through a port d of the electromagnetic four-way valve II11, enters through a port b of the electromagnetic four-way valve I1, flows out through a port a of the electromagnetic four-way valve I1, and then returns to the water pump I2 to realize heating circulation in the second heat pump vehicle. In this mode, the multi-channel control valve 25 is in an ab and cd communicating state and an ad closing state; the electromagnetic four-way valve II11 is in an ad communication state; the electromagnetic four-way valve I1 is in a ba communication state.
10. Heating (motor waste heat) and PTC heat supplementing modes in the second heat pump vehicle are as follows: when the residual heat of the motor is insufficient, the water pump PTC integrated heater 21 can be started to heat the PTC heating circulating liquid, and the power of the water pump PTC integrated heater 21 can be adjusted according to the heat demand. As shown in fig. 10, the high-temperature and high-pressure refrigerant compressed by the compressor 15 exchanges heat with the low-temperature cooling liquid through the plate heat exchanger II14, becomes a supercooled liquid, then enters through the port a of the multi-function multi-channel control valve 13, flows out through the port d of the multi-function multi-channel control valve 13 (an electronic expansion valve is arranged inside a → d), is throttled to become a low-pressure and low-temperature refrigerant, absorbs heat of the motor circulating liquid through the plate heat exchanger I12, then enters the gas-liquid separator 16, and then returns to the compressor 15. The PTC heating circulating liquid flows through the water pump PTC integrated heater 21, absorbs heat, enters through a port c of the electromagnetic three-way valve 20, flows out through a port b of the electromagnetic three-way valve 20, then enters the vehicle interior radiator 22, cools the vehicle interior radiator 22 under the action of the vehicle interior cooling fan 24, the temperature of the air rises, the cooled liquid enters through a port a of the multi-channel control valve 25, flows out through a port b of the multi-channel control valve 25, then flows through the plate heat exchanger II14, absorbs refrigerant heat, enters through a port c of the multi-channel control valve 25, flows out through a port d of the multi-channel control valve 25, and then returns to the water pump PTC integrated heater 21. The motor circulating liquid flows through the charging system 3, the direct-current power supply converter 4, the motor control system 5 and the motor 6 under the action of the water pump I2, then enters through a port b of the electromagnetic three-way valve II17, flows out through a port a of the electromagnetic three-way valve II17, then passes through the plate heat exchanger I12, transfers heat to a refrigerant, enters through a port a of the electromagnetic four-way valve II11, flows out through a port d of the electromagnetic four-way valve II11, enters through a port b of the electromagnetic four-way valve I1, flows out through a port a of the electromagnetic four-way valve I1, and then returns to the water pump I2 to realize heating circulation in the second heat pump vehicle. In this mode, the multi-channel control valve 25 is in an ab and cd communicating state and an ad closing state; the electromagnetic four-way valve II11 is in an ad communication state; the electromagnetic four-way valve I1 is in a ba communication state.
11.1, first defrosting mode: generally, the surface of the external heat exchanger 8 of the vehicle can be frosted when the system runs for a long time, and at the moment, the battery has higher heat dissipation requirement, so that the battery can be cooled when defrosting is carried out. As shown in fig. 4, the high-temperature and high-pressure refrigerant compressed by the compressor 15 passes through the plate heat exchanger II14, then enters through the port a of the multi-function multi-channel control valve 13, flows out through the port b of the multi-function multi-channel control valve 13 (a → b is connected only as a pipeline), then enters the exterior heat exchanger 8 to release heat to the environment to become a supercooled liquid state, frost on the surface of the exterior heat exchanger 8 is removed by using high temperature, then enters through the port c of the electromagnetic three-way valve I7, flows out through the port b of the electromagnetic three-way valve I7, then passes through the throttling of the electronic expansion valve I18 with a stopping function to become a low-pressure and low-temperature refrigerant, enters the plate heat exchanger IV30 to exchange heat with the cooling liquid in the battery cooling system, then enters the gas-liquid separator 16, and then returns to the compressor 15. The battery circulating liquid flows through the battery heat exchange module 28 under the action of the water pump II27, absorbs heat on the surface of the battery, then enters the plate heat exchanger IV30, transfers the heat to a refrigerant to realize cooling, then enters through the port b of the electromagnetic three-way valve IV29, flows out through the port c of the electromagnetic three-way valve IV29, flows through the plate heat exchanger III26, and then returns to the water pump II27 to realize defrosting circulation. In the mode, the electronic expansion valve 19 with the cut-off function is in a closed state, the multifunctional multi-channel control valve 13 is in an ab communication state, and ac and ad are in a closed state; the electromagnetic three-way valve IV29 is in the bc communicating state.
11.2, a second defrosting mode: the system comprises a water pump PTC integrated heater 21, an electromagnetic three-way valve III20, a plate heat exchanger III26 and a multi-channel control valve 25 which are connected in sequence to form a communication loop, a water pump II27, a battery heat exchange module 28, a plate heat exchanger IV30, an electromagnetic three-way valve IV29 and a plate heat exchanger III26 which are connected in sequence to form a communication loop, and a compressor 15, a plate heat exchanger II14, a multifunctional multi-channel control valve 13, an external heat exchanger 8, an electromagnetic three-way valve I7, an electronic expansion valve I18 with a stop function, a plate heat exchanger IV30 and a gas-liquid separator 16 which are connected in sequence to form a communication loop; when the surface temperature of the battery is low, the battery does not need to be cooled, so the battery is preheated by the water pump PTC integrated heater 21, and the battery is ensured to work within the working temperature range. As shown in fig. 11, the high-temperature and high-pressure refrigerant compressed by the compressor 15 passes through the plate heat exchanger II14, then enters through the port a of the multi-function multi-channel control valve 13, flows out through the port b of the multi-function multi-channel control valve 13 (a → b is only used as a pipe connection), then enters the exterior heat exchanger 8 to release heat to the environment to become a supercooled liquid state, frost on the surface of the exterior heat exchanger 8 is removed by using high temperature, then enters through the port c of the electromagnetic three-way valve I7, flows out through the port b of the electromagnetic three-way valve I7, then enters the electronic expansion valve I18 with a cut-off function, is throttled to become a low-pressure and low-temperature refrigerant, enters the plate heat exchanger IV30 to exchange heat with the cooling liquid in the battery cooling system, then enters the gas-liquid separator 16, and then returns to the compressor 15. The PTC heating circulating liquid flows through the water pump PTC integrated heater 21, absorbs heat, enters through a port c of the electromagnetic three-way valve III20, flows out through a port a of the electromagnetic three-way valve III20, enters the plate heat exchanger III26 to exchange heat with low-temperature cooling liquid, enters through a port a of the multi-channel control valve 25, flows out through a port d of the multi-channel control valve 25, and then returns to the water pump PTC integrated heater 21. The battery circulating liquid flows through the battery heat exchange module 28 under the action of the water pump II27, the batteries are preheated, then the battery circulating liquid enters the plate type heat exchanger IV30, heat is transferred to a refrigerant to achieve cooling, then the battery circulating liquid enters the port b of the electromagnetic three-way valve IV29, flows out of the port c of the electromagnetic three-way valve IV29, flows through the plate type heat exchanger III26, absorbs heat of the refrigerant, and then returns to the water pump II27 to achieve defrosting circulation. In this mode, the electronic expansion valve II19 with a shutoff function is in a closed state; the multifunctional multi-channel control valve 13 is in an ab communication state, and in an ac and ad closing state; the electromagnetic three-way valve IV29 is in the bc communicating state.
Referring to fig. 1, in another embodiment provided by the present invention, the present invention further includes expansion pots, one of the expansion pots is connected to the connecting pipeline of the integrated heater and the multi-channel control valve, and is connected to the connecting pipeline of the electromagnetic three-way valve III20 and the plate heat exchanger III 26; the other expansion pot is connected with a solenoid four-way valve I1 and is also connected with a motor radiator 9.
Specifically, the expansion kettles are an expansion kettle I33 and an expansion kettle II34 respectively, the expansion kettle I33 is connected with a connecting pipeline of the integrated heater and the multi-channel control valve, and is connected to a connecting pipeline of the electromagnetic three-way valve III20 and the plate heat exchanger III26 at the same time; the expansion pot II34 is connected with the electromagnetic four-way valve I1 and is also connected with the motor radiator 9.
The working principle of the invention is as follows: the multifunctional multi-channel control valve, the multi-channel control valve and the integrated heater are integrated components with multiple functions, and replace partial joints and components of the existing air-conditioning system, so that the number of the joints and the components of the air-conditioning system are effectively reduced, and the compactness, the safety and the reliability of the system are effectively improved; the cooling liquid of the motor is circularly conveyed by the water pump I through the motor module, the electromagnetic three-way valve II and the electromagnetic four-way valve I in sequence by switching the multi-channel control valve and the multi-channel control valve; the compressor circularly conveys the refrigerant to sequentially pass through the plate heat exchanger II, the multifunctional multi-channel control valve, the plate heat exchanger I and the gas-liquid separator; the integrated heater circularly conveys cooling liquid to sequentially pass through the electromagnetic three-way valve III, the in-vehicle radiator, the multi-channel control valve, the plate heat exchanger II and the multi-channel control valve; recovering the waste heat of the motor and using the waste heat as a low-temperature heat source for heating in the vehicle; the problem of when the heat pump type automobile air conditioning system operates under a low-temperature working condition, the exhaust temperature of the compressor is too high, and the heating capacity is obviously insufficient is solved.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. A heat pump automotive air conditioning system, comprising:
the water pump I, the motor module, the electromagnetic three-way valve II, the plate heat exchanger I, the motor radiator and the electromagnetic four-way valve I which are sequentially connected form a communication loop;
the compressor, the plate heat exchanger II, the multifunctional multi-channel control valve, the external heat exchanger, the electromagnetic three-way valve I, the heat exchange assembly and the gas-liquid separator which are sequentially connected form a communicating loop;
the water pump II, the battery heat exchange module, the heat exchange assembly, the electromagnetic three-way valve IV and the plate heat exchanger III which are connected in sequence form a communicating loop;
the integrated heater, the electromagnetic three-way valve III, the radiator or the plate heat exchanger III in the vehicle and the multi-channel control valve which are connected in sequence form a communication loop;
when the air conditioning system is in a low-temperature working condition, the multi-channel control valve and the multifunctional multi-channel control valve are switched to connect a part of communicated loops, so that heat generated by the motor module is supplied to a radiator or an integrated heater in the vehicle through the plate heat exchanger I and the plate heat exchanger II;
the heat exchange component comprises a battery radiator and a plate type heat exchanger IV,
the multifunctional multi-channel control valve is provided with electronic expansion valves arranged in part or all of the channels and used for throttling and pressure regulating,
the multifunctional multi-channel control valve has three working modes:
ab communication: the plate type heat exchanger II and the external heat exchanger are connected;
ac communication: the electronic expansion valve is arranged in the heat exchanger, has a throttling function and is used for connecting the plate type heat exchanger II with the heat exchanger outside the vehicle;
ad communication: the electronic expansion valve is arranged in the heat exchanger, has a throttling function and is connected with the plate heat exchanger II and the plate heat exchanger I; wherein a, b, c and d are four ports of the multifunctional multi-channel control valve respectively;
the multi-channel control valve is provided with four ports a, b, c and d, wherein the port a is connected with the radiator and the plate heat exchanger III in the vehicle, the port b and the port c are both connected with the plate heat exchanger II, and the port d is connected with the integrated heater and the expansion pot I.
2. The heat pump automotive air conditioning system of claim 1, further comprising:
the water pump I, the motor module, the electromagnetic three-way valve II, the electromagnetic four-way valve II, the motor radiator and the electromagnetic four-way valve I which are sequentially connected form a communicating loop;
the water pump I, the motor module, the electromagnetic three-way valve II, the electromagnetic four-way valve II and the electromagnetic four-way valve I which are connected in sequence form a communication loop;
the compressor, the plate heat exchanger II, the multifunctional multi-channel control valve, the external heat exchanger or the plate heat exchanger I and the gas-liquid separator which are connected in sequence form a communication loop;
the integrated heater, the electromagnetic three-way valve III, the in-vehicle radiator, the multi-channel control valve, the plate heat exchanger II and the multifunctional multi-channel control valve which are sequentially connected form a communicating loop.
3. The heat pump automobile air-conditioning system according to claim 1, wherein when the air-conditioning system is in an in-vehicle cooling and battery cooling mode, the multifunctional multichannel control valve, the electromagnetic three-way valve I and the electromagnetic three-way valve IV are adjusted to enable the compressor to circularly convey the refrigerant to sequentially pass through the plate heat exchanger II, the multifunctional multichannel control valve, the external heat exchanger, the electromagnetic three-way valve I, the heat exchange assembly, the in-vehicle evaporator and the gas-liquid separator, and the water pump II circularly convey the battery coolant to sequentially pass through the battery heat exchange module, the plate heat exchanger IV, the electromagnetic three-way valve IV and the plate heat exchanger III.
4. The heat pump vehicle air conditioning system of claim 1, wherein when the air conditioning system is in the PTC in-vehicle heating mode, the three-way solenoid valve III and the multi-channel control valve are adjusted such that the integrated heater circulates coolant through the three-way solenoid valve III, the in-vehicle radiator, and the multi-channel control valve in this order.
5. The heat pump automobile air-conditioning system according to claim 1, wherein when the air-conditioning system is in the PTC battery preheating mode, the three-way solenoid valve IV, the three-way solenoid valve III and the multi-channel control valve are adjusted to allow the integrated heater to circulate and convey the coolant through the three-way solenoid valve III, the plate heat exchanger III and the multi-channel control valve in sequence, and simultaneously, the water pump II circulates and conveys the battery coolant through the battery heat exchange module, the plate heat exchanger IV, the three-way solenoid valve IV and the plate heat exchanger III in sequence.
6. The heat pump automobile air-conditioning system according to claim 1, wherein when the air-conditioning system is in the first heat pump automobile heating mode and the PTC concurrent heating mode, the multifunctional multi-channel control valve, the electromagnetic three-way valve III and the multi-channel control valve are adjusted to enable the compressor to circularly convey the refrigerant to pass through the plate heat exchanger II, the multifunctional multi-channel control valve, the automobile heat exchanger and the gas-liquid separator in sequence; the integrated heater circularly conveys cooling liquid to sequentially pass through the electromagnetic three-way valve III, the in-vehicle radiator, the multi-channel control valve, the plate heat exchanger II and the multi-channel control valve.
7. The heat pump automobile air-conditioning system according to claim 1, wherein when the air-conditioning system is in the second defrosting mode, the multifunctional multi-channel control valve, the electromagnetic three-way valve I, the electromagnetic three-way valve III, the multi-channel control valve and the electromagnetic three-way valve IV are adjusted to enable the compressor to circularly convey the refrigerant to pass through the plate heat exchanger II, the multifunctional multi-channel control valve, the external heat exchanger, the electromagnetic three-way valve I, the plate heat exchanger IV and the gas-liquid separator in sequence; the integrated heater circularly conveys cooling liquid to sequentially pass through the electromagnetic three-way valve III, the plate heat exchanger III and the multi-channel control valve; and the water pump II circularly conveys the battery cooling liquid to pass through the battery heat exchange module, the plate type heat exchanger IV, the electromagnetic three-way valve IV and the plate type heat exchanger III in sequence.
8. The heat pump automobile air-conditioning system according to claim 1, further comprising expansion pots, one of the expansion pots being connected to a connecting line of the integrated heater and the multi-channel control valve, and being connected to a connecting line of the electromagnetic three-way valve III and the plate heat exchanger III at the same time; and the other expansion kettle is connected with the electromagnetic four-way valve I and is simultaneously connected with a motor radiator.
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