Evaporator Common evaporators for double-door direct-cooling refrigerators are: blown-type evaporators for freezer compartments, plate-tube evaporators, and serpentine-tube evaporators with tank slices for freezer compartments. Finned tube evaporators for intermittent refrigerators. Most of them are made of aluminum, so the leakage failure rate is very high. From the point of view of repair, it...