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The air conditioning unit of Chery A15 car is divided into five basic composition parts as per different functions, namely cooling system, heating system, ventilation system, control system and air purification system. (1). Cooling system adopts vapor compression refrigeration theory to cool down the air in car compartment. As the cooling sources, the evaporator’s temperature is even lower than dew point, therefore the cooling system also has the functions of dehumidification and air purification. The cooling system of Chery electric-controlled fuel injection engine car uses R134a coolant. As shown in the figure, the cooling system mainly consists of compressor, condenser, expansion valve, evaporator, etc. Liquid coolant in evaporator absorbs heat in the air in car compartment and is gasified into low-temperature and low-pressure coolant vapor and then absorbed by compressor which compresses coolant vapor into high-pressure and high-temperature gas and transmits it to condenser, where the coolant is cooled by ambient air and condensed into fluid after releasing heat, and then is dewatered by fluid reservoir. The high-pressure and high-temperature coolant fluid is throttled by expansion valve (fixed in evaporator inlet tube) to lower the pressure and temperature, and then reenters evaporator. The low-temperature and low-pressure coolant fluid then again absorbs heat in car compartment and is regasified into low-temperature and low-pressure coolant vapor to be reabsorbed by compressor. By this continuous circulation, the cooling system lowers the temperature inside car.
蒸发器:Evaporator 空调控制系统:Air conditioning control system 暖风水箱:Warm air water tank 压缩机:Compressor 冷凝器及管路:Condenser and pipeline
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