| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve both a heating capacity and energy efficiency. <P>SOLUTION: This refrigeration device includes a refrigerant circuit (20) in which a compressor (21), an indoor heat exchanger (22), a first expansion valve (23), a gas-liquid separator (24), a second expansion valve (26), and an outdoor heat exchanger (27) are sequentially connected, and which conducts a refrigeration cycle of a two-stage expansion type. The refrigerant circuit (20) includes: a gas injection pipe (2c) in which a gas refrigerant at the intermediate pressure of the gas-liquid separator (24) flows in an intermediate port of the compressor (21); and a liquid-gas heat exchanger (25) in which a gas refrigerant at low pressure which is evaporated at the outdoor heat exchanger (27) and goes to the compressor (21), exchanges heat with the liquid refrigerant at the intermediate pressure going from the gas-liquid separator (24) to the second expansion valve (26). <P>COPYRIGHT: (C)2013,JPO&INPIT |
