A. The shell is made of quality steel plate; plastic-sprayed surface is anti-corrosive, and its appearance is handsome. B. Coiled pipes are mechanical expanding tubes in staggered arrangement; therefore, copper tubes and fins are combined closely and ensure good effect of heat exchange. C. Water defrosting realizes quick defrosting, good effect and less energy consumption. D. Long-distance air supply or explosion-proff motors can be used according to customers' requirements. Water-defrosting evaporative air cooler is one kind of cooling equipment used in those cold storages where electrical defrosting is not applicable, or quick defrosting is required. According to applicable temperature. There are 3 series including DLS, DDS, DJS, which are applicable to about 0°C, -18°C and -25°C cold storages respectively.