To improve a cooling capability and to reduce cost by cooling a large space in a storage cabinet to a predetermined temperature, and easily maintaining in a narrow temperature range zone of an icing point of a storage material.

An antifreeze solution in a cool thermal storage tank 31 is iced and fed upward. The solution (a) at a bottom of a cooler casing 21 is injected from a jet nozzle 33 in an upper part to prevent adherence of iced fine particles of the solution to each other in the tank 31. A low temperature antifreeze solution (a') is outputted from an outlet 35, supplied to the bottom of the casing 21, the solution (a') is circulated and injected from the nozzle 25, the air is brought upward into contact with the solution (a') as a counterflow to obtain a cold air.