The evaporators are heat exchangers, except that in these cases the heat exchange occurs between the food or the internal environment of the product with the refrigerant.
Modern refrigerators, for the most part, use an aluminum evaporator produced by the Roll Bond system. This type of evaporator is made from two aluminum plates joined by heating at 500 ° C. Prior to annealing, the channels are printed in graphite on the plates so that the heating does not take place at these points. Afterwards, the channels are expanded under a pressure of 150 ATM.
Cold-Wal type evaporators consist of an internal casing or tubeless tank. This type of evaporator is widely used in the industries of horizontal refrigerators and for its manufacture are used copper, bundy, etc.
