In an air conditioning refrigeration system, the compressor acts to compress and deliver refrigerant gas. The expansion valve acts as a throttling and depressurizing function, and at the same time regulates the flow rate of the refrigerant liquid entering the evaporator, which is the boundary between the high and low pressure of the system. The evaporator is a device that outputs cold air, in which the refrigerant absorbs heat of the cooled air to cool the air. The condenser is a device that emits heat, and the heat absorbed by the evaporator and the heat converted by the work consumed by the compressor are discharged from the condenser and taken away by the cooling air. The air conditioning compressor is one of the main components of the automotive air conditioning system. It is a low-voltage and high-pressure, low-temperature and high-temperature conversion device in the refrigeration system.
The function of the compressor is to make the compressor inlet low pressure, so that the evaporator carries the latent heat (including the heat absorbed in the vehicle compartment) and the refrigerant flows out of the evaporator. This low pressure state allows the refrigerant to enter the evaporator. The low pressure gaseous refrigerant is compressed into a high pressure gaseous refrigerant. These two functions of the compressor only enter the evaporator. The low pressure gaseous refrigerant is compressed into a high pressure gaseous refrigerant. As long as one of the two functions of the compressor fails, the refrigerant in the air conditioning system cannot be circulated, and the air conditioning system will work poorly or cannot be cooled.