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1? Composition of air conditioning system

The air conditioning system is mainly composed of compressor, condenser, evaporator, expansion valve, dry liquid reservoir and pipeline.

2.2? Brief introduction of refrigeration principle

1)? After the user starts the automobile air-conditioning system according to the operating procedure, the compressor starts to work under the drive of the engine, and the engine drives the refrigerant (R 134a, which is environment-friendly and will not destroy the ozone layer, and is non-toxic, non-irritating, non-combustible and non-corrosive) to circulate in the closed air-conditioning system, and the compressor compresses the gaseous refrigerant into high-temperature and high-pressure refrigerant gas, which is discharged from the compressor.

2)? After the refrigerant gas with high temperature and high pressure flows into the condenser through the pipeline, it dissipates heat and cools down in the condenser and condenses into liquid refrigerant with high temperature and high pressure.

3)? High-temperature and high-pressure liquid refrigerant enters the drying reservoir through the pipeline, and flows into the expansion valve after drying and filtering.

4)? After the high-temperature and high-pressure liquid refrigerant is throttled by the expansion valve, its state changes sharply and becomes a low-temperature and low-pressure liquid refrigerant.

5)? The low-temperature and low-pressure liquid refrigerant immediately enters the evaporator, where it absorbs the heat of the air flowing through the evaporator, which lowers the air temperature, blows out cold air and produces refrigeration effect. The refrigerant itself evaporates into a low-temperature and low-pressure gaseous refrigerant due to heat absorption.

6)? The gaseous refrigerant with low temperature and low pressure is sucked by the compressor through the pipeline and compressed to enter the next cycle. As long as the compressor works continuously, the refrigerant circulates continuously in the air conditioning system, resulting in refrigeration effect. When the compressor stops working, the refrigerant in the air conditioning system stops flowing and does not produce refrigeration effect.