EJECTOR CYCLE

PROBLEM TO BE SOLVED: To prevent reduction in return quantity of freezer oil to a compressor in accordance with stoppage of cooling function of an evaporator connected to a refrigerant suction port side of an ejector. SOLUTION: The ejector cycle comprises a first evaporator 14 evaporating refrigerant flowing out of the ejector 13, a second evaporator 21 evaporating refrigerant sucked to the refrigerant suction port 13c of the ejector 13, and an on-ff valve 19 opening and closing a refrigerant passage of the second evaporator 21, the refrigerant suction port 13c being arranged in an upper part of the ejector 13. According to this, the freezer oil can be prevented from falling from the inside of the ejector 13 into a suction pipe 25 through the refrigerant suction port 13c at the time of closing the on-off valve 19. COPYRIGHT: (C)2006,JPO&NCIPI