Heat pump air conditioning device for new energy vehicle

Abstract

The utility model discloses a heat pump air conditioning device for a new energy vehicle, which comprises a plate heat exchanger, a refrigerant outlet of the plate heat exchanger is communicated with an inlet of a gas-liquid separator through a pipeline, and a temperature and pressure sensor I is connected in series on the pipeline for connecting the gas-liquid separator and the plate heat exchanger; an outlet of the gas-liquid separator is connected with an inlet of the electric compressor through a pipeline, an outlet of the electric compressor is communicated with a first port of the four-way valve through a pipeline, a second port of the four-way valve is connected with an inlet of the indoor condenser through a pipeline, and an outlet of the indoor condenser is connected with a one-way valve. A refrigerant inlet of the plate heat exchanger is connected with a refrigerant pipeline, a second temperature sensor, a second pressure sensor and an electronic expansion valve are connected to the refrigerant pipeline in series, and the mode of each air conditioner heat pump, cab refrigeration, battery refrigeration, dehumidification, cab heating, defrosting, cab and battery simultaneous refrigeration and the like are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and specifically to a heat pump air-conditioning device for new energy vehicles. Background Art

[0002] Electric vehicles are currently a key trend and hot topic in my country's automotive development. The heat pump air conditioning systems they support differ from traditional systems in that they use electricity to drive the compressor. While the industry has made some progress in environmentally friendly refrigerants, most air conditioning systems still use R134a, which struggles to maintain normal, continuous operation within ambient temperatures of -10°C to 55°C. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a heat pump air-conditioning device for new energy vehicles, which realizes the modes of various air-conditioning heat pumps: cab cooling, battery cooling, dehumidification, cab heating, defrosting, simultaneous cooling of the cab and battery, etc., which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat pump air-conditioning device for a new energy vehicle, comprising a plate heat exchanger, wherein the refrigerant outlet of the plate heat exchanger is connected to the inlet of a gas-liquid separator through a pipeline, and a temperature and pressure sensor is connected in series on the pipeline connecting the gas-liquid separator and the plate heat exchanger, the outlet of the gas-liquid separator is connected to the inlet of an electric compressor through a pipeline, the outlet of the electric compressor is connected to the first port of a four-way valve through a pipeline, the second port of the four-way valve is connected to the inlet of an indoor condenser through a pipeline, the outlet of the indoor condenser is connected to a one-way valve, the refrigerant inlet of the plate heat exchanger is connected to a refrigerant pipeline, and the refrigerant pipeline is connected in series There are two temperature and pressure sensors and an electronic expansion valve. The outlet of the one-way valve is connected to the inlet of the refrigerant pipeline through a pipeline. The third port of the four-way valve is connected to the inlet of the outdoor radiator through a pipeline. The outlet of the outdoor radiator is connected to the second electronic expansion valve. The outlet of the second electronic expansion valve is connected to the inlet of the refrigerant pipeline. The fourth port of the four-way valve is connected to the outlet of the evaporator through a pipeline. The pipeline connecting the four-way valve and the evaporator is connected to the inlet of the gas-liquid separator. The inlet end of the evaporator is connected to the third electronic expansion valve. The inlet of the third electronic expansion valve is connected to the inlet end of the refrigerant pipeline through a pipeline. The battery refrigerant liquid inlet and outlet of the plate heat exchanger are connected to the battery temperature control system.

[0005] Furthermore, an exhaust temperature sensor is provided on the pipeline connecting the electric compressor and the four-way valve.

[0006] Furthermore, temperature detection components are installed on the outdoor radiator, evaporator and indoor condenser.

[0007] Furthermore, the battery temperature control system includes a kettle, the inlet of the kettle is connected to the battery coolant outlet of the plate heat exchanger through a pipeline, the outlet of the kettle is connected to the inlet of the water pump through a pipeline, the outlet of the water pump is connected to the coolant inlet of the battery heat dissipation unit through a pipeline, and the coolant outlet of the battery heat dissipation unit is connected to the battery coolant inlet of the plate heat exchanger through a pipeline.

[0008] Furthermore, temperature detection components are installed at the battery coolant outlet and inlet of the plate heat exchanger.

[0009] Compared with the existing technology, the beneficial effects of the utility model are: compared with the conventional heat pump air-conditioning system, it has a simple structure, fewer pipelines, and high integration, which reduces the suction and exhaust resistance of the compressor. It can work stably at an ambient temperature of -10°C when the air-conditioning is heating, and can still work stably at an ambient temperature of 55°C when the air-conditioning is cooling. The heat pump air-conditioning device for new energy vehicles realizes the modes of various air-conditioning heat pumps, cab cooling, battery cooling, dehumidification, cab heating, defrosting, and simultaneous cooling of the cab and battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the utility model.

[0011] In the figure: 1 plate heat exchanger, 2 gas-liquid separator, 3 temperature and pressure sensor 1, 4 electric compressor, 5 four-way valve, 6 exhaust temperature sensor, 7 indoor condenser, 8 one-way valve, 9 refrigerant pipeline, 10 temperature and pressure sensor 2, 11 electronic expansion valve, 12 outdoor radiator, 13 electronic expansion valve 2, 14 evaporator, 15 electronic expansion valve 3, 16 kettle, 17 water pump, 18 battery cooling unit. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0013] See also Figure 1The utility model provides a technical solution: a heat pump air-conditioning device for a new energy vehicle, comprising a plate heat exchanger 1, the refrigerant outlet of the plate heat exchanger 1 is connected to the inlet of a gas-liquid separator 2 through a pipeline, and a temperature and pressure sensor 3 is connected in series on the pipeline connecting the gas-liquid separator 2 and the plate heat exchanger 1, the outlet of the gas-liquid separator 2 is connected to the inlet of an electric compressor 4 through a pipeline, the outlet of the electric compressor 4 is connected to the first port of a four-way valve 5 through a pipeline, the second port of the four-way valve 5 is connected to the inlet of an indoor condenser 7 through a pipeline, the outlet of the indoor condenser 7 is connected to a one-way valve 8, and the refrigerant inlet of the plate heat exchanger 1 is connected to the inlet of the electric compressor 4 through a pipeline. The refrigerant pipe 9 is connected to a temperature and pressure sensor 2 10 and an electronic expansion valve 11 in series on the refrigerant pipe 9. The outlet of the one-way valve 8 is connected to the inlet of the refrigerant pipe 9 through a pipe. The third port of the four-way valve 5 is connected to the inlet of the outdoor radiator 12 through a pipe. The outlet of the outdoor radiator 12 is connected to the electronic expansion valve 2 13. The outlet of the electronic expansion valve 2 13 is connected to the inlet of the refrigerant pipe 9. The fourth port of the four-way valve 5 is connected to the outlet of the evaporator 14 through a pipe. The pipe connecting the four-way valve 5 and the evaporator 14 is connected to the inlet of the gas-liquid separator 2. The inlet end of the evaporator 14 is connected to the electronic expansion valve 3 15. The inlet of the electronic expansion valve 3 15 is connected to the inlet of the refrigerant pipeline 9 through a pipeline. The battery refrigerant inlet and outlet of the plate heat exchanger 1 are connected to the battery temperature control system. An exhaust temperature sensor 6 is provided on the pipeline connecting the electric compressor 4 and the four-way valve 5. Temperature detection components are installed on the outdoor radiator 12, the evaporator 14 and the indoor condenser 7. The battery temperature control system includes a kettle 16. The inlet of the kettle 16 is connected to the battery coolant outlet of the plate heat exchanger 1 through a pipeline. The outlet of the kettle 16 is connected to the inlet of the water pump 17 through a pipeline. The outlet of the water pump 17 is connected to the coolant inlet of the battery cooling unit 18 through a pipeline. The coolant outlet of the battery heat dissipation unit 18 is connected to the battery coolant inlet of the plate heat exchanger 1 through a pipeline. Temperature detection components are installed at the battery coolant outlet and inlet of the plate heat exchanger 1. Compared with the conventional heat pump air-conditioning system, it has a simple structure, fewer pipelines, and high integration, which reduces the suction and exhaust resistance of the compressor. It can work stably at an ambient temperature of -10°C when the air-conditioning is heating, and can still work stably at an ambient temperature of 55°C when the air-conditioning is cooling. The heat pump air-conditioning device for new energy vehicles realizes the modes of various air-conditioning heat pumps, including cab cooling, battery cooling, dehumidification, cab heating, defrosting, and simultaneous cooling of the cab and battery.

[0014] When in use: the first pair of single batteries are cooled, and the refrigerant flows in the following direction: the refrigerant in the gas-liquid separator 2 is compressed by the electric compressor 4, and then the refrigerant enters the four-way valve 5, and the first port and the third port of the four-way valve 5 are connected, and the refrigerant enters the outdoor radiator 12, and the outdoor radiator 12 dissipates heat to the refrigerant, and the refrigerant after heat dissipation enters the plate heat exchanger 1, and the battery coolant is cooled by the refrigerant, and the cooled battery coolant is pumped into the battery heat dissipation unit 18 by the water pump 17, so as to cool the battery; the second air-conditioning box is cooled, and the refrigerant in the gas-liquid separator 2 is compressed by the electric compressor 4, and then the refrigerant enters the four-way valve 5, and the first port and the third port of the four-way valve 5 are connected, and the refrigerant enters the outdoor radiator The outdoor radiator 12 dissipates heat to the refrigerant, and the refrigerant after heat dissipation enters the evaporator 14, and distributes cold air through the evaporator 14 for cooling. Third, when the air conditioner is heating, the refrigerant in the gas-liquid separator 2 is compressed by the electric compressor 4, and then the refrigerant enters the four-way valve 5. The first port and the second port of the four-way valve 5 are connected, and the refrigerant enters the indoor condenser 7, and dissipates heat through the indoor condenser 7. The refrigerant after heat dissipation enters the plate heat exchanger 1, and the battery coolant is cooled by the refrigerant, and then cooled by the battery temperature control system. The flow rate of the three electronic expansion valves 15 is switched to accurately control the functions of cab cooling, battery cooling, dehumidification, cab heating, defrosting, and simultaneous cooling of the cab and battery.

[0015] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A heat pump air conditioning device for a new energy vehicle, comprising a plate heat exchanger (1), characterized in that: The refrigerant outlet of the plate heat exchanger (1) is connected to the inlet of the gas-liquid separator (2) through a pipeline, and a temperature and pressure sensor (3) is connected in series on the pipeline connecting the gas-liquid separator (2) and the plate heat exchanger (1). The outlet of the gas-liquid separator (2) is connected to the inlet of the electric compressor (4) through a pipeline, and the outlet of the electric compressor (4) is connected to the first port of the four-way valve (5) through a pipeline. The second port of the four-way valve (5) is connected to the inlet of the indoor condenser (7) through a pipeline. The outlet of the indoor condenser (7) is connected to a one-way valve (8). The refrigerant inlet of the plate heat exchanger (1) is connected to a refrigerant pipeline (9). The refrigerant pipeline (9) is connected in series with a temperature and pressure sensor (10) and an electronic expansion valve (11). The one-way valve (8) ) is connected to the inlet of the refrigerant pipeline (9) through a pipeline, the third port of the four-way valve (5) is connected to the inlet of the outdoor radiator (12) through a pipeline, the outlet of the outdoor radiator (12) is connected to the electronic expansion valve 2 (13), the outlet of the electronic expansion valve 2 (13) is connected to the inlet of the refrigerant pipeline (9), the fourth port of the four-way valve (5) is connected to the outlet of the evaporator (14) through a pipeline, the pipeline connecting the four-way valve (5) and the evaporator (14) is connected to the inlet of the gas-liquid separator (2), the inlet end of the evaporator (14) is connected to the electronic expansion valve 3 (15), the inlet of the electronic expansion valve 3 (15) is connected to the inlet end of the refrigerant pipeline (9) through a pipeline, and the battery refrigerant inlet and outlet of the plate heat exchanger (1) are connected to the battery temperature control system.

2. A heat pump air-conditioning device for a new energy vehicle according to claim 1, characterized in that: An exhaust temperature sensor (6) is provided on the pipeline connecting the electric compressor (4) and the four-way valve (5).

3. A heat pump air-conditioning device for a new energy vehicle according to claim 1, characterized in that: Temperature detection components are installed on the outdoor radiator (12), the evaporator (14) and the indoor condenser (7).

4. A heat pump air-conditioning device for a new energy vehicle according to claim 1, characterized in that: The battery temperature control system includes a kettle (16), the inlet of the kettle (16) is connected to the battery coolant outlet of the plate heat exchanger (1) through a pipeline, the outlet of the kettle (16) is connected to the inlet of a water pump (17) through a pipeline, the outlet of the water pump (17) is connected to the coolant inlet of a battery heat dissipation unit (18) through a pipeline, and the coolant outlet of the battery heat dissipation unit (18) is connected to the battery coolant inlet of the plate heat exchanger (1) through a pipeline.

5. A heat pump air-conditioning device for a new energy vehicle according to claim 4, characterized in that: Temperature detection components are installed at both the battery coolant outlet and the battery coolant inlet of the plate heat exchanger (1).

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