JPS6488077A - Cooling device - Google Patents

Abstract

PURPOSE: To enable a cooling device to be used only when its application is desired and to prevent deterioration in quality of items to be cooled with gas being not contacted with the items by a method wherein a gas venting member of which one end communicates with a pressure container storing coolant and the other end of which is opened to surrounding atmosphere is provided with an opening or closing valve and an opening or closing adjusting member. CONSTITUTION: A pressure container 1 is positioned within a container where items (c) to be cooled are stored, a lower cylinder 2 is inserted into the pressure container, an upper adjusting threaded cylinder 5 is rotated and moved upward, a pressing-down force of a closed- end cylinder 7 against an opening or closing valve 4 is loosened, an adjusting screw 12 is rotated to move a hollow lever 11 upward against a biasing force of a spring 14, and a pressing-down force of an opening or closing valve 13 against a gas discharging port 6 at the cylinder 7 having a bottom part. Gasified gas coolant within the pressure container 1 pushes up the opening or closing valve 4, pushes up the opening or closing valve 13 and the gas is discharged into the surrounding atmosphere through the hollow lever 11. Accordingly, the items are effectively cooled by gasified latent heat of coolant (a). In the case that the cooling is stopped, an upper adjusting screw cylinder 5 and the hollow lever 11 are moved downward, gas discharging holes 3 and 6 are pressed down and closed by the opening or closing valves 4, 13, an inner side of the pressure container 1 is sealed against the surrounding atmosphere, gasification of the coolant (a) is stopped and the coolant (a) is stored.