PURPOSE: To improve a function of maintaining the cold in the title case, by a method wherein inner lids having a cold-storage agent therein are placed on a recessed part formed around the upper part of the title case main body, are separated from the recessed part, and are placed so as to be in contact with an evaporator.
CONSTITUTION: At the start of cooling, first, inner lids 16 are progressively separated from a recessed part 14, and are brought into contact with an evaporator 8. In this way, the inner lids 16 are effectively cooled by the evaporator 8, and sufficiently accumulate cold-heat, and freeze. At the same time, a space 9 in the case is also precooled by excess cold-heat from the evaporator 8. At the normal operation of the title case, the inner lids 16 in which the cold-heat has been stored are placed on the recessed part 14. In this way, the inner lids 16 make the space 9 in the state of closing, and the whole of the space 9 can be effectively cooled with the cold-air from vents 21, etc., on the upper part of the space 9, by its gravity. As the result of it, when a door 11 to be opened upward is opened, the cold-air can be prevented from dispersing and when defrosting is done, the temperature in the space 9 is strongly restrained from rising. Therefore, the function of maintaining the cold in the title cold storage is strongly heightened.
SAGARA TOSHIO
OTANI MEGUMI
