Air-conditioning system of new energy automobile

Abstract

The invention discloses an air-conditioning system of a new energy automobile and belongs to the technical field of automotive air-conditioning systems. The air-conditioning system of the new energy automobile includes a refrigerating fluid circulation loop and a bypass; the refrigerating fluid circulation loop includes a compressor, a four-way reversing valve, an inner automotive heat exchanger and an outer automotive heat exchanger, a vent port of the compressor is connected with an inlet end of the four-way reversing valve, and the inner automotive heat exchanger and the outer automotive heat exchanger are successively connected between a first port and a second port of the four-way reversing valve through a pipeline and connected with an air suction port of the compressor through a third port of the four-way reversing valve; the bypass is in parallel connection with the compressor and is provided with a first solenoid valve and a bypass valve in sequence. On the premise of not changing a circulation pattern of the air-conditioning system, by arranging the bypass at the vent port of the compressor, a high-temperature high-pressure refrigerating fluid drained out from the vent port of the compressor is conveyed into the air suction port of the compressor through the bypass valve, and therefore the air suction pressure of the air suction port of the compressor is enhanced, sothat a purpose of defrosting is achieved.

Description

technical field [0001] The invention belongs to the technical field of automobile air-conditioning systems, and in particular relates to a new energy automobile air-conditioning system. Background technique [0002] With the development of economy and society, low-carbon life is more in line with people's life today. New energy vehicles are popular because of their low-carbon and environmental protection. With the further improvement of new energy vehicle technology, people put forward new requirements for the comfort of new energy vehicles Higher requirements, the air-conditioning system of new energy vehicles plays an important role in new energy vehicles, especially in winter, the quality of the air-conditioning system of new energy vehicles directly affects the experience of passengers, on the one hand, the air-conditioning system of new energy vehicles in winter needs Provide heat source to the inside of the car. On the other hand, the outdoor heat exchanger of the car ...

AI Technical Summary

Problems solved by technology

[0002] With the development of economy and society, low-carbon life is more in line with people's life today. New energy vehicles are popular because of their low-carbon and environmental protection. With the further improvement of new energy vehicle technology, people put forward new requirements for the comfort of new energy vehicles Higher requirements, the air-conditioning system of new energy vehicles plays an important role in new energy vehicles, especially in winter, the quality of the air-conditioning system of new energy vehicles directly affects the experience of passengers, on the one hand, the air-conditioning system of new energy vehicles in winter needs Provide heat source to the inside of the car. On the other hand, the outdoor heat exchanger of the car will have the problem of frosting due to the continuous drop of surface temperature. The air conditioning system of the new energy vehicle also needs to undertake the defrosting function of the outdoor heat exchanger, otherwise the outdoor heat Frosting will reduce the heat transfer efficiency of the heat exchanger and the efficiency of the air-conditioning system. In the prior art, there are three main ways to defrost the air-conditioning system: (1) When the outdoor heat exchanger of the air conditioner needs to be defrosted, Switch the air-conditioning system from the heating cycle to the cooling cycle to achieve the purpose of defrosting. Although this method can quickly defrost, but the original heating mode is switched, which brings bad body feeling to the passengers in the car and affects The comfort of passengers in the car; (2) Bypass the high-temperature and high-pressure refrigerant discharged from the compressor exhaust port to the evaporator inlet. This method has a good defrosting effect, but this method has a long bypass pipe and increases the The resistance of the bypass is used in the automotive air conditioning system, which reduces the reliability of the system; (3) defrosting with the help of external heat sources, such as heaters, etc., the heater will consume the electricity of new energy vehicles, thus affecting the performance of new energy vehicles battery life

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