The refrigerant enters the evaporator, and the pressure decreases from high pressure to low pressure gas. This process needs to absorb heat, so the surface temperature of the evaporator is very low, and then through the fan, the cold air can be blown out. Cold L condenser is from the compressor out of the high pressure, high temperature refrigerant, cooling into high pressure, low temperature. Then through capillary gasification, to evaporate in the evaporator.