Variable speed oil-injected screw compressors
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United States of America Patent
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Jun 13, 2006
Grant Date -
May 20, 2004
app pub date -
Sep 24, 2001
filing date -
Sep 25, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to the use of variable speed control of the cooling fan on a variable speed oil-injected screw compressor. A screw compressor (11) comprises at least one stage of compression, each with a pair of rotors, variable speed compressor drive means (12), an oil reclaimer (13) from the compressed air and cooling apparatus (17) for cooling the oil extracted from the compressed air. The cooling apparatus comprises a heat exchange device and a fan (18) driven by a motor (19) which can be run at different speeds.
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