Motor-driven centrifugal air compressor with internal cooling airflow
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United States of America Patent
Stats
-
Aug 15, 2000
Grant Date -
N/A
app pub date -
Sep 10, 1997
filing date -
Sep 10, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A motor-driven compressor comprises a motor that is carried by a motor-enclosing housing portion, a compressor wheel that is driven by the motor within a second housing portion forming a pressurized enclosure, and means for providing a flow of cooling air for the motor from the pressurized compressor housing portion to the motor-enclosing housing portion. In this motor-driven compressor a small portion of the air flowing through the compressor is directed to the motor housing as cooling air for the motor windings and then is either exhausted to atmosphere or recirculated to the compressor air inlet. As a result, a portion of the internal heat generated in the windings is carried away, permitting a higher level of power to be produced reliably by the motor on a continuous basis and, in turn, allowing the compressor to deliver more compressed air at higher pressure to the receiving entity.
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