| 摘要 |
An object of the present invention is to keep an appropriate amount of a refrigerant to be circulated through a refrigerant circuit and prevent an overload operation of compression means due to high pressure abnormality in a refrigerating apparatus which obtains a supercritical pressure on a high pressure side. The refrigerating apparatus (R) obtains the supercritical pressure on the high pressure side. In the refrigerating apparatus (R), a refrigerant circuit (1) is formed on the high pressure side by a compressor (11), a gas cooler (46), main reducing means (62A, 62B), evaporators (63A, 63B). The refrigerating apparatus (R) comprises an oil separator (44) for separating the oil from the refrigerant sprayed from the compressor (11), an oil return circuit (73), an oil cooler (74), an oil bypass circuit (78),an electromagnetic valve (79) and a control means (C) for controlling these valves to collect a refrigerant circulated through the refrigerant circuit in the tank and discharging the refrigerant to the refrigerant circuit. |
