| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigerating cycle capable of performing defrosting operation without taking a heat quantity from others and reliably performing a liquid back operation at this point. <P>SOLUTION: In the refrigerating cycle (1) comprising a compressor (2), a condenser (5), an expansion valve (15), an evaporator (4) and the like, an accumulator (11) is provided on the upstream side of the compressor (2) and a direction switching mechanism (9) is provided on the downstream side. A receiver (14) is provided between the condenser (5) and the expansion valve (15) and the receiver (14) and the accumulator (11) are connected by a refrigerant pipe (R13) for defrosting having an opening and closing valve (29) interposed. A bypass pipe (R9) having a check valve (16) interposed is connected to the expansion valve (15) in parallel. During defrosting operation, a refrigerant is circulated from the compressor (2), to the evaporator(4), the bypass pipe (R9), the receiver (14), the refrigerant pipe (R13) for defrosting and the accumulator (11) in this order. <P>COPYRIGHT: (C)2012,JPO&INPIT |
