Fan hub assembly for effective motor cooling
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United States of America Patent
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Jul 17, 2007
Grant Date -
Mar 31, 2005
app pub date -
Sep 30, 2003
filing date -
Sep 30, 2003
priority date (Note) -
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Abstract
An electrically powered axial-flow fan has a hub to house the motor and support the fan blades. Small blades or vanes on the inside of the hub function as a radial-flow blower to draw cooling air through cooling ports on the electric motor housing. The vanes inside the hub cooperate with a flange surrounding the motor to form a low pressure chamber under the hub to improve cooling flow through the motor. This motor cooling air flow is then ejected into the exhaust stream of the axial-flow fan.
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