PURPOSE: To obtain a thermal insulator having high economy and wide usage by providing a heat insulating member in which a vacuum heat insulator is arranged and a cold accumulator arranged in a cold accumulating room.
CONSTITUTION: In a cold accumulating heat insulator, a cooler 18 cools a cold accumulator, and when a prescribed temperature is realized, a cold accumulator temperature detector 21 operates to control a freezing temperature to be within a prescribed temperature range. By this, inside of a cold accumulating room 17 is kept at a lower temperature than inside of a thermal insulating room 5, but heat exchange between the cold accumulating room 17 and the thermal insulating room 5 is limited to be low because of thermal insulation by a cabinet 2. On the other hand, when charge of a battery and thermal insulation of the thermal insulating room 5 are started at the same time of cold accumulating operation of the cold accumulator 20, a thermal insulating room temperature detector 11 is operated to drive a thermal insulating fan 10 so that cooled air is introduced into the cold accumulating room 17. This introduction of the air inside the thermal insulating room 5 into the cold accumulating room 17 is continued until the thermal insulating room 5 has a set temperature. As a result of this, even during a cold accumulating operation, both refrigerating thermal insulation and freezing thermal insulation can be obtained by controlling cooled air volume supplied to the thermal insulating room. Thus, a cold accumulating thermal insulator having wide usage and high ecomony can be obtained.
FUJIMOTO SHINJI
SHIMIZU TAKESHI
