We have developed a vane rotary type capacity control compressor equipped with a capacity control mechanism which works on a principle where, in the compressor, arc shaped slider move over a wide range through ring shaped groove and automatically delay the substantial of suction process ending position (starting position of compression process). During development, we performed theoretical analysis of control response and stability (where elementary cycle characteristics where added to compressor characteristics including pressure control valves and capacity control mechanism), and experimental performance analysis of control principles, and reviewed system characteristics of the entire refrigerating cycle. The developed vane rotary type capacity control compressor has the following features. 1. Capacity control mechanism with wide range from 10 to 100%. 2. Pressure control mechanism with quick response and high stability. 3. Simple structure with few added parts.
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