| 摘要 |
<p>PURPOSE:To simplify a configuration of a freezing cycle, shorten a raising time of a heating operation and stabilize a performance of a cooling and heating device by a method wherein an outlet port of an outdoor heat exchanger and an inlet port of an accumulator are connected by a refrigerant recovery circuit through a liquid accumulation part, a downstream side of the liquid accumulation part of the outdoor heat exchanger and a return side of a compressor in the refrigerant recovery circuit are connected by a liquid injection circuit. CONSTITUTION:A refrigerant recovery circuit 20 connects an outlet port 21 of an outdoor heat exchanger with an inlet port of an accumulator. The refrigerant recovery circuit 20 is provided with a check valve 23, a liquid accumulation part 3a disposed at the lower part if the outdoor heat exchanger 3 and a two- way valve 24 in sequence from its upstream side. The liquid refrigerant accumulated at the liquid accumulation part 3a disposed at the lower part of the outdoor heat exchanger 3 is fed into the inlet port 22 of the accumulator. In turn, a pipe passage branched between the liquid accumulation part 3a of the outdoor heat exchanger 3 and the two-way valve 24 in the refrigerant recovery circuit 20 is connected to a return side of a compressor 1 so as to constitute a liquid injection circuit 25.</p> |
