To enhance efficiency of a refrigerating cycle device by suppressing dropping of an expander pressure, and maintaining power recovery efficiency in an expander.
The refrigerating cycle device is provided with a refrigerating cycle circuit circulating a refrigerant in an order of a compressor 1, a radiator 2, a first restrictor device 3, a gas-liquid separator 4, the expander 5, and an evaporator 6, and a bypass circuit 8 carrying one part of the refrigerant from the gas-liquid separator 4 to the compressor 1 via a bypass flow regulating valve 7. A bypass flow rate control means 10 is provided for regulating an opening of the bypass flow regulating valve 7 to control a refrigerant flow rate of the bypass circuit 8, and a first restrictor device control means 12 is provided for regulating an opening of the first restrictor device 3 to control a refrigerant circulation amount flowing through the radiator 2. The expander pressure can be controlled by opening regulation of the bypass flow regulating valve 7, a pressure loss in the evaporator 6 can be reduced by bypassing a gas refrigerant separated in the gas-liquid separator 4, and efficiency enhancement can be realized.
| JP5309105 | Refrigeration equipment |
| JP5277854 | Air conditioner |
| JP2001207960 | AIR CONDITIONER |
TAMURA TOMOICHIRO
SAITO TETSUYA
HONMA MASAYA
Shinichi Abe
Yuji Tsujida