COOLING STORAGE AND METHOD OF OPERATING THE SAME

摘要

Cooling of a freezing compartment and a refrigeration compartment is performed alternately by supplying liquid refrigerant from a compressor (20) and a condenser (21) alternately to a chiller (27F) for the freezing compartment and an evaporator (27R) for the refrigeration compartment through a three-way valve (24). The ratio of refrigerant supply time to respective evaporators is not controlled based on the difference between a target temperature set for each storage compartment and the actual temperature measured in each storage compartment but controlled based on the integrated value of the difference. Since the integrated value of temperature difference does not vary suddenly even if the door is opened temporarily and the temperature in the compartment is raised temporarily by outer air flowing into the storage compartment, unnecessary transition to alternate cooling mode can be prevented when one storage compartment is in cooling mode. In a cooling storage chamber where refrigerant is supplied from one compressor selectively to a plurality of evaporators provided in a plurality of storage compartments of different thermal load, respectively, unnecessary transition to alternate cooling mode is prevented when one storage compartment is in cooling mode.