| 摘要 |
<p>A refrigeration system in which the load on a compressor can be lessened while an operation efficiency is enhanced. In a so-called binary multistage refrigeration system (1) where a cascade heat exchanger (43) is constituted of the evaporator (34) in a high temperature side refrigerant circuit (25) and the condensation pipe (42) in a low temperature side refrigerant circuit (38), and cryogenic temperature is attained by an evaporation pipe (62) in the low temperature side refrigerant circuit (38), an oil separator (43) for separating oil in non-azeotropic mixed refrigerant and returning the oil to the compressor (20) is provided on the delivery side of the compressor (20) in the low temperature side refrigerant circuit (38), and a radiator (39) is interposed between the oil separator (43) and the compressor (20).</p> |
