| 摘要 |
PURPOSE:To provide a multicylinder rotary compressor wherein improvement of durability and reliability can be attained to spread a range of compressing power without applying unreasonableness to a constitutional part in a compressing mechanism part in the case of switching an operational condition of cylinder quantity. CONSTITUTION:A compressor comprises an electric motor part 3 of operational frequency variable and a compressing mechanism part 4 driven by this electric motor part to provide a plurality of cylinders 6, 7 and to perform action of compressing compressed fluid in the respective cylinders. The compressor provides a switching mechanism 20 provided in the one cylinder 6 to switch as necessary a compression condition in this cylinder 6 to a noncompression condition and a control circuit 27 for controlling the switching action timing of this switching mechanism taken after decreasing the operational frequency of the electric motor part 3 once to the minimum operational frequency.
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