| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To stabilize heat exchange amount of an evaporator 41 while minimizing the reduction of power recovering amount of an expander 31 by keeping a pressure in a gas-liquid separator 35 in an optimum state, in a refrigerating device comprising a compressor 30 mechanically connected with the expander 31. <P>SOLUTION: This refrigerating device is provided with an intermediate pressure target value calculating portion 71 for calculating a target intermediate pressure to achieve a lowest value of an intermediate pressure within a range to liquid-seal a front side of an indoor expansion valve 51 on the basis of an operating state of a refrigerant circuit 10, an upper limit opening calculating portion 78 for limiting an opening range of a gas amount regulation valve 36 according to the target intermediate pressure calculated by the intermediate pressure target value calculating portion 71, and a gas amount regulation valve control portion 79 for adjusting a gas amount regulation valve 36 to control the intermediate pressure of the refrigerant circuit 10 to the target intermediate pressure within the opening range limited by the upper limit opening calculating portion 78. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
