To save energy in an apparatus for refrigeration cycle, and ensure reliability of a compressor.
The apparatus for refrigeration cycle includes: a first compressor 101; a second compressor 102 arranged in parallel with the first compressor 101; a radiator 103; an expander 104 directly connected to the first compressor 101 on an axis; a gas-liquid separator 105; an evaporator 106 connected to the bottom of the gas-liquid separator 105, and configured to take in a liquid refrigerant so as to discharge a gas refrigerant to the first compressor 101 and the second compressor 102; a first compressor injection circuit 108 for connecting the upper part of the gas-liquid separator 105 and the second compressor 102 via a first flow control valve 107; and a liquid by-pass circuit 110 for connecting, via a second flow control valve 109, the lower part of the gas-liquid separator 105 to the first compressor injection circuit 108 at somewhere between the gas-liquid separator 105 and the first flow control valve 107 thereon.
TANIGUCHI KATSUSHI
KOSUDA OSAMU
Daisuke Nagano
Kentaro Fujii