PURPOSE: To defrost effectively without affecting the cooling efficiency of a refrigerator by supplying refrigerant to a refrigeration load by way of a plurality of low temperature side reaction tanks when shifting hydrogen transfer operation.
CONSTITUTION: A refrigerator comprises a plurality of high temperature side reaction tanks 1 and 1' which are built in with high temperature hydrogen storage alloy and a plurality of low temperature side reaction tanks 2 and 2' which are built in with low temperature hydrogen storage alloy, which are all connected with each other refrigerant is supplied to refrigeration load by way of a plurality of low temperature side reaction tanks 2 and 2' when shifting hydrogen transfer operation. Therefore, sensible heat collection takes place in the reaction tanks to some degree, which makes it possible to eliminate frost, preventing the in-flow of much heat into a refrigerator during operation shift. It is, therefore, possible to defrost effectively without lowering the cooling efficiency of the refrigerator.
NASAKO KENJI
FURUKAWA AKIO
