| 摘要 |
The invention provides a cooling device which has a supercritical pressure at a high-pressure side, can properly maintain the amount of a circulatory refrigerant in a refrigerant circuit, and can prevent the overload operation of a compressing mechanism due to an abnormally high pressure. The invention relates to a cooling device (R) with a supercritical pressure formed at the high-pressure side,and the device comprises: a refrigerant amount adjusting box (100) connected to the high-pressure side through a communicating circuit (101); a communicating circuit (103) communicating the upper part of the box and an intermediate-pressure region; a communicating circuit (105) communicating the lower part of the box and the intermediate-pressure region; an electric expansion valve (102) of the communicating circuit (101); a solenoid valve (104) of the communicating circuit (103); a solenoid valve (106) of the communicating circuit (105); and a control device (C) controlling the electric expansion valve (102) and various valve devices to recover the circulatory refrigerant in the refrigerant circuit into the box and to charge the refrigerant into the refrigerant circuit (1). |
