The operation of the air cooler is similar to a evaporator. The difference depends on the type of refrigerant used. An air cooler is a type of heat exchanger that is used to cool and dehumidify air. The air cooler can be, copper or steel tubing on which aluminum fins are mounted.
The refrigerant flowing through the heat exchanger and cools down the aluminum fins, where heat is exchanged between the refrigerant and the air. The air to be cooled / dehumidified is directed by a fan over the aluminum fins. Air coolers are used for air conditioning (cooling, heating) of buildings and warehouses, and for industrial air cooling (such as chillers).