Influence of Clealance Volume on the Performance of the Rolling Piston Type Rotary Compressor

概要

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This paper is concerned with the rolling piston type rotary compressor for the air conditioner. The rotary compressor, as well as the reciprocating compressor, is one of the positive displacement compressors and has clearance volume of discharge port. But the influence of clearance volume on the performance of the rotary compressor is not equal to that to the reciprocating compressor. We analysed a reverse flow of suction gas through a suction opening caused by the re-expansion of high pressure gas in clearance volume taking account of throttling effects of suction and discharge openings. We investigated influences of operating conditions and dimensional parameters on volumetric efficinecy. Also we estimated compressor work using p-V diagram. It was made clear that clearance volume of the rotary compressor hardly decreases volumetric efficiency but increases compressor work in contrast with that of reciprocating compressor. Theoretical results are in good agreement with experimental results.