The evaporator is a kind of heat transfer apparatus where the heat transfer is done by forced convection or natural convection. It is used in an air-conditioning system to allow a compressed cooling chemical, such as R-22 or R-404A (Freon)etc., to evaporate from liquid to gas while absorbing heat in the process. The evaporator works the opposite of the condenser. Here refrigerant liquid is converted to gas, absorbing heat from the air in the compartment. When the liquid refrigerant reaches the evaporator its pressure has been reduced, dissipating its heat content and making it much cooler than the fan air flowing around it. This causes the refrigerant to absorb heat from the warm air and reach its low boiling point rapidly. The refrigerant then vaporizes, absorbing the maximum amount of heat. This heat is then carried by the refrigerant from the evaporator as a low-pressure gas through a hose or line to the low side of the compressor, where the whole refrigeration cycle is repeated.

The evaporator is a kind of heat transfer apparatus where the heat transfer is done by forced convection or natural convection. It is used in an air-conditioning system to allow a compressed cooling chemical, such as R-22 or R-404A (Freon)etc., to evaporate from liquid to gas while absorbing heat in the process. The evaporator works the opposite of the condenser. Here refrigerant liquid is converted to gas, absorbing heat from the air in the compartment. When the liquid refrigerant reaches the evaporator its pressure has been reduced, dissipating its heat content and making it much cooler than the fan air flowing around it. This causes the refrigerant to absorb heat from the warm air and reach its low boiling point rapidly. The refrigerant then vaporizes, absorbing the maximum amount of heat. This heat is then carried by the refrigerant from the evaporator as a low-pressure gas through a hose or line to the low side of the compressor, where the whole refrigeration cycle is repeated.