| 摘要 |
PROBLEM TO BE SOLVED: To surely defrost inside heat exchangers while preventing an excess rise of an inside temperature during a defrosting operation, in a refrigerating device comprising the plurality of inside heat exchangers connected in parallel with each other. SOLUTION: In a refrigerant circuit 15 of this refrigerating device 10, the plurality of inside heat exchangers 24, 34, 44 are connected in parallel with each other. In the refrigerating device 10, an inverse cycle-type defrosting operation is performed to melt the frost attached to the inside heat exchangers 24, 34, 44. During the defrosting operation, a defrosting operation control portion 83 of a controller 80 holds inside expansion valves 25, 35, 45 corresponding to the inside heat exchangers 24, 34, 44 during defrosting, in a fully-opened state, and controls openings of the inside expansion valves 25, 35, 45 corresponding to the inside heat exchangers 24, 34, 44 of which the defrosting is terminated. Here, the defrosting operation control portion 83 adjusts the openings of the inside expansion valves 25, 35, 45 to keep a supercooling degree of a refrigerant flowing out from the inside heat exchangers 24, 34, 44 corresponding to the inside expansion valves at a prescribed target value. COPYRIGHT: (C)2008,JPO&INPIT
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