The paper refers to some approaches towards the realization of a rolling piston type hermetic compressor with high efficiency for a room air conditioner and an unitary air conditioner. There are several loss factors which affect a rotary compressor. Particularly in this paper, the losses which are caused in the cylinder of the rotary compressor have been investigated, experimentally in the main. As a result, volumetric efficiency and compression efficiency have been greatly improved, and a high efficient rotary compressor has been realized.
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