| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerator having high reliability by always raising a pressure in an oil tank higher than a pressure in a compressor, and effectively supplying oil from the tank into the compressor. SOLUTION: In the refrigerator, compressors 1a, 1b, an oil separator 2, a condenser 5, a liquid reservoir 6, a refrigerant throttle valve 25 and an evaporator 26 are annularly connected by piping to constitute a refrigerating cycle for circulating refrigerant. An oil tank 3 for storing refrigerating machine oil separated by the separator 2 is connected to the separator 2, and oil regulators 4a, 4b for regulating the oil amounts to be supplied to the compressors 1a, 1b are disposed between the tank 3 and the compressors 1a, 1b. Further, hot gas bypass piping 7 for communicating a refrigerant output side of the separator 2 of a refrigerant high pressure part of the cycle with the tank 3 is provided therebetween.
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