| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a refrigerating device for improving coefficient of performance while keeping reliability of an apparatus even when load is changed, in the refrigerating device using a refrigerant acting in processes including a process of a supercritical state. <P>SOLUTION: A heat source-side heat exchanger 4 is connected to a discharge side of a high stage-side compressing element 2d, and connecting pipes 72, 73, 74, 75 are connected to the heat source-side heat exchanger 4 and an expanding mechanism 5. Connecting pipes 77, 2a are connected to a use-side heat exchanger 6 and a suction side of a low stage-side compressing element 2c. A liquid-gas heat exchanger 8 exchanges heat between a refrigerant flowing in the connecting pipes 72, 73, 74, 75 and a refrigerant flowing in the connecting pipes 77, 2a. A liquid gas three-way valve 8C switches a state that the refrigerant flows to a part passing through the liquid-gas heat exchanger 8 among the connecting pipes 72, 73, 74, 75, and a state that the refrigerant flows to a liquid gas bypass pipe 8B connecting one end side and the other end side of the part passing through the liquid-gas heat exchanger 8. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
