Multi-stage capacity-controlled scroll compressor
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United States of America Patent
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Nov 12, 2002
Grant Date -
Jun 13, 2002
app pub date -
Jan 23, 2002
filing date -
Jun 12, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A first bypass valve (27) that sets discharge capacity to 60% is provided in a first scroll 21 of an asymmetrical spiral-type scroll compressor. Also, a second bypass valve (40) that makes suction side and discharge side communicated with each other so that set load of the compressor becomes 50% is provided outside a scroll of the first scroll (21). In this way, by closing the first and second bypass valves (27, 40), effective load of the compressor is set to 100%. Also, by opening the first bypass valve (27) and concurrently closing the second bypass valve (40), the effective load of the compressor is set to 60%. Further, by opening both the first and second bypass valves (27, 40), the effective load of the compressor is set to 30%.
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