| 摘要 |
PROBLEM TO BE SOLVED: To provide an ejector type refrigeration cycle capable of sufficiently cooling a cooling object fluid regardless of load fluctuations.SOLUTION: An ejector type refrigeration cycle includes: a radiator 12 which radiates heat of a refrigerant discharged from a compressor 11; an ejector 20 which decompresses the refrigerant cooled at the radiator 12; a gas-liquid separator 15 which separates a gas from a liquid in the refrigerator flowed out from a diffuser part 20d of the ejector 20; and an evaporator 16 disposed in a refrigerant passage connecting the gas-liquid separator 15 with a refrigerant suction port 20c of the ejector 20. Further, the ejector type refrigeration cycle includes an on-off valve 14 which switches the refrigerant passage between a first refrigerant passage for flowing out the injection refrigerant injected from a nozzle part 20a of the ejector 20 from the diffuser part 20d and a second refrigerant passage for flowing out the injection refrigerant from the refrigerant suction port 20c. When a rotational speed Nc of the compressor 11 becomes lower than or equal to a reference rotational speed KNc, the refrigerant passage is switched from the first refrigerant passage to the second refrigerant passage. |
