| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbo refrigerator capable of cooling an overheated compressor refrigerant gas by sucking a refrigerant liquid from a lower part of an evaporator and supplying it to a suction side of a compressor at operation time of a hot gas bypass circuit.SOLUTION: A turbo refrigerator includes: a hot gas bypass pipeline 15 for returning a refrigerant gas of an upper part of a condenser 2 to an upper part of an evaporator 3; a hot gas bypass valve 16 for opening/closing the hot gas bypass pipeline 15; an ejector 20 for sucking a refrigerant liquid from a lower part of the evaporator 3 with the refrigerant gas discharged from a turbo compressor 1 being a gas for drive, and discharges it to a suction side of the turbo compressor 1; a liquid injection valve 22 for opening/closing a refrigerant supply flow passage for supplying the refrigerant liquid from the evaporator 3 to the ejector 20; and a control device 10 for performing opening/closing control of the hot gas bypass valve 16 and the liquid injection valve 22. |
