| 摘要 |
PURPOSE:To improve the volume efficiency, particularly in the high speed operation region by installing an inertia supercharge device having the resonance peak of a suction pipe in the vicinity of the set max. revolution speed, in a compressor equipped with a compression mechanism part and an electric motor part. CONSTITUTION:In the casing 1 of a rotary compressor used for a refrigerator, an electric motor part 2 and a compression mechanism part 3 which is revolution-driven through a shaft 5 by the electric motor part 2 are housed. An accumulator 10 for preventing the inhaling of the liquid coolant during compression and a suction pipe 12 for connecting the outlet to the suction port of the compressor are provided on the suction side. In this case, the captioned device is allowed to operate as the inertia supercharge device having the resonance peak of the suction pipe 12 in the vicinity of the set max. revolution speed by specifying the length Ls of the suction pipe 12, inside diameter As, etc. Further, the inertia supercharge characteristic number is set at 0.6 or more, and the ratio between the resonance frequency of the piping system and the revolution frequency of the compressor is set close to 1.
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