Cooling means for a motor-driven centrifugal air compressor
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United States of America Patent
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May 18, 1999
Grant Date -
N/A
app pub date -
Dec 20, 1996
filing date -
Dec 20, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A motor-driven compressor assembly comprises a compressor air intake, a compressor rotor, a compressed air outlet and an electric motor for the compressor rotor, with the air intake of the compressor assembly directing intake airflow to the compressor rotor into a heat transfer relationship with the electric motor. The motor-driven compressor includes an outer casing and an inner housing for the electric motor that together form the air intake so the intake airflow through the air intake so formed cools the motor. The motor housing is, in preferred embodiments, a central barrel carrying the electric motor within an outer casing so the intake airflow surrounds the central barrel. The outer casing may also form a mounting surface for motor control electronics, and provide inner finned surfaces in the path of the intake airflow to cool the control electronics. For some applications, the motor-driven compressor can include an operable air bypass between the compressor's air intake and compressed air outlet.
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