Answer: The role of the evaporator is to absorb the heat of the compressed air in the evaporator and evaporate it into refrigerant gas after the refrigerant has been reduced in pressure by the throttling device, and then enter the compressor for circulation. The compressed air is forced to cool in the evaporator, and most of the water vapor is cooled and condensed into liquid water and discharged through the drain valve, thereby achieving the purpose of dehydrating and drying the compressed air. The evaporator is a convection heat exchange between air and low-pressure refrigerant medium.
