Electric automobile carbon dioxide air conditioning system with spray evaporation cooling type air cooler

Abstract

The invention discloses an electric automobile carbon dioxide air conditioning system with a spray evaporation cooling type air cooler. The system comprises a compressor, an external air cooler with an axial flow fan, an intermediate heat exchanger, an electronic expansion valve, an internal evaporator with a centrifugal fan, a liquid storage device and a condensate water recycling spray device, wherein the compressor, the external air cooler, the intermediate heat exchanger, the electronic expansion valve, the internal evaporator and the liquid storage device are connected in sequence to form a carbon dioxide circulating flow path, and the recycled condensate water spraying device collects condensate water of the internal evaporator and sprays water mist to the external air cooler. The system is advantaged in that condensate water recovered from the internal evaporator is used as a water source, spray evaporation cooling is performed on a surface of the external air cooler, and the temperature of the carbon dioxide outlet end of the external air cooler is reduced, so the high-pressure side operation pressure of the transcritical cycle is reduced, power consumption of the compressor is reduced, and the refrigerating capacity and system energy efficiency are improved; meanwhile, efficient recycling of the condensate water is achieved, and a series of problems such as bacterium breeding caused by direct discharging of the condensate water to the outside are solved.

Description

technical field [0001] The invention relates to a technology in the field of automobile air conditioning, in particular to an electric vehicle carbon dioxide air conditioning system with a spray evaporative cooling air cooler. Background technique [0002] Electric vehicles use batteries as a power source, without exhaust pollution, green and environmentally friendly, and their applications are becoming more and more extensive. It is also because electric vehicles do not have an internal combustion engine, and the waste heat of the engine cannot be used as a heat source for the heating of the passenger compartment. If an electric heater is used to directly heat the passenger compartment, the cruising range of the battery will be greatly reduced. Carbon dioxide, as a natural refrigerant, is more and more widely used in the field of electric vehicle heat pumps because of its good heating performance. However, because the carbon dioxide system needs to operate in a transcritic...

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Problems solved by technology

[0003] Aiming at the problem of poor refrigeration effect of the existing carbon dioxide air conditioning system, especially the attenuation of refrigeration performance under high temperature conditions, the present invention proposes a carbon dioxide air conditioning system for electric vehicles with a spray evaporative cooling air cooler, which utilizes evaporation from the inside The condensed water recovered by the cooler is used as the water source to spray and evaporatively cool the surface of the external air cooler to reduce the temperature of the carbon dioxide outlet end of the external air cooler, thereby reducing the operating pressure of the high-pressure side of the transcritical cycle, reducing the power consumption of the compressor, and increasing the cooling capacity and system energy efficiency, while achieving efficient recycling of condensed water, avoiding a series of problems such as bacterial growth caused by direct discharge of condensed water

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