| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a binary refrigeration cycle apparatus capable of shortening a defrosting period, and having high efficiency of operation. <P>SOLUTION: A refrigeration cycle apparatus includes a low temperature-side refrigeration cycle 110, a high temperature-side refrigeration cycle 120, and detects frost-formed state of a low temperature-side evaporator 114 of the low temperature-side refrigeration cycle 110. When an operation should be shifted to a defrosting operation for thawing frost of the low temperature-side evaporator 114, an operation of the low temperature-side compressor 111 of the low temperature-side refrigeration cycle 110 is continued, an operation of the high temperature-side compressor 121 of the high temperature-side refrigeration cycle 120 is only stopped, and the operation is shifted to the defrosting operation. When the operation is shifted to the defrosting operation, heat-accumulated high temperature low temperature-side refrigerant is supplied to the low temperature-side evaporator 114 to defrost. Accordingly, it is possible to shorten the defrosting time and to enhance the efficiency of operation of a refrigeration cycle. <P>COPYRIGHT: (C)2013,JPO&INPIT |
