| 摘要 |
PROBLEM TO BE SOLVED: To prevent the power recovered by an expander from being lost by an adjustment valve for adjusting a refrigerant flow rate when a heat exchanger is used as an evaporator during a time when a refrigerant releasing heat in the heat exchanger flows into the expander, in a refrigerating device in which the expander for recovering power is disposed in a refrigerant circuit. SOLUTION: The refrigerant circuit 10 is provided with a switching circuit 24 for switching a state that an expansion inflow line 48 is communicated with a heat source-side line 38, and an expansion outflow line 49 is communicated with an use-side line 39, and a state that the expansion inflow line 48 is communicated with the use-side line 39, and the expansion outflow line 49 is communicated with the heat source-side line 38. A heat source-side adjustment valve 43 for adjusting the refrigerant flow rate of a heat source-side heat exchanger 44 in a heating operation is disposed in a refrigerant circulation passage 52 connecting the expansion outflow line 49 and the heat source-side line 38 in the switching circuit 24. COPYRIGHT: (C)2009,JPO&INPIT
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