| 摘要 |
PROBLEM TO BE SOLVED: To provide a compressor capable of ensuring the optimum efficiency of a system and ensuring reliability and durability of the compressor by controlling to the optimum OCR in wide rotational speed of the compressor in accordance with achievement of high speed rotation of the compressor. SOLUTION: This compressor has two reintroduction holes or more for communicating a separation chamber with an oil storage chamber, and one reintroduction hole or more among two reintroduction holes or more can be opened and closed and are opened at a position where turn flow in the separation chamber disturbs an oil surface in the oil storage chamber in an opened condition. In a region where rotational speed of the compressor is from low speed to middle speed, reintroduction holes other than a first reintroduction hole are controlled to a closed condition. In a region where rotational speed of the compressor is high speed, all the reintroduction holes including the first reintroduction hole are controlled to an opened condition. By disturbing an oil surface in the oil storage chamber by turn flow in the separation chamber intentionally, efficiency of lubricating oil separation is worsened. Consequently, amount of lubricating oil in cycle can be controlled, and high efficiency of the system and the optimum OCR for ensuring reliability and durability of the compressor can be ensured. COPYRIGHT: (C)2007,JPO&INPIT
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