... Square evaporator for freezing roomSystem: 1) evaporator for single temperature control system (single capillary evaporator); 2) evaporator for double temperature control system (double capillary evaporator); 3) evaporator for three ... three capillary evaporator)Key processTube bending, Al plate punching, Surface cleaning, Bounding, Weld the suction, Tube assembly, Leakage test, Drying, Surface ...