OPERATION CONTROLLER FOR REFRIGERATOR

PURPOSE:To make consumption degree of devices uniform by making a total operating time of a plurality of circuit systems in a refrigerator having the plurality of circuit systems. CONSTITUTION:Compressors 2a, 3a, condensers 2c, 3c, pressure reducing valves EV1, EV2, and evaporators 2i, 3i are respectively disposed in a plurality of circuit systems 2, 3. Only one 2 or 3 of the systems 2, 3 is operated by steady operation means 51 during operating of a refrigerator. At the time of defrosting, the systems 2, 3 are operated by defrosting means 52 to conduct defrosting. After the defrosting is ended, the system to be operated is sequentially switched from a circuit system to be desirably operated to other circuit system before a defrosting operation by operating circuit system switching means 53. Thus, the total operating time of the systems 2, 3 can be substantially made uniform. Particularly, when it is applied to a refrigerating plant for a container or a device to be defrosted at each predetermined time, its effect is increased.