| 摘要 |
PROBLEM TO BE SOLVED: To perform efficient operation by isothermal compression without performing complicated control when performing oil injection by a compression mechanism (20) with an oil injection port (24) communicated with a refrigerant suction port (76) in a suction stroke. SOLUTION: An injection start pointθs represents a position where the suction stroke ends and an injection end pointθi represents a position before a discharge stroke ends, during operation with the suction stroke, a compression stroke, and a discharge stroke regarded as one cycle. A controller (95) controls the oil injection mechanism so that oil injection operation is performed in at least a part of a range from the injection start pointθs to the injection end pointθi. COPYRIGHT: (C)2009,JPO&INPIT
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