| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently improve a coefficient of performance (COP) of an ejector type refrigeration cycle in which a refrigerant with a refrigerator oil dissolved therein, is circulated.SOLUTION: An oil separator 15 for separating a refrigerator oil from a high-pressure refrigerant discharged from a compressor 11 and returning the separated refrigerator oil to a suction port side of the compressor 11, is disposed in an ejector-type refrigeration cycle 10 including an ejector 13 for swirling the refrigerant in a swirl space 30a as swirl flow generation means, and enhancing boiling of the refrigerant circulated in a nozzle passage 13a by bringing the refrigerant flowing into the nozzle passage 13a in the nozzle 32, into a state of being separated in two phases. Thus steam pressure drop of the refrigerant flowing into the swirl space 30a can be suppressed, energy conversion efficiency in the nozzle passage 13a as a refrigerant passage in a nozzle 32 is sufficiently improved, and COP of the ejector-type refrigeration cycle 10 can be sufficiently improved.SELECTED DRAWING: Figure 1 |
