Air conditioning evaporator is a kind of evaporator. The function of the air conditioning evaporator is to make use of the fact that the liquid cryogenic refrigerant is easy to evaporate under low pressure, convert into steam and absorb the heat of the cooled medium, so as to achieve the refrigeration purpose.

It relies on the fan to force the air in the warehouse to flow through the cooling exhaust pipe in the box for heat exchange, so as to cool the air, thus achieving the purpose of reducing the warehouse temperature. Among them, the refrigerant or refrigerant carrier flows in the exhaust pipe and cools the air outside the pipe through the pipe wall, which is called dry air cooler; It is called wet air cooler if the sprayed refrigerant liquid directly exchanges heat with air; In addition to the cooling exhaust pipe, the mixed air cooler also has a refrigerant carrier spray device. The dry air coolers commonly used in cold storage can be divided into ceiling type and floor type according to their installation positions.