Axial fan
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United States of America Patent
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-
Feb 13, 2018
Issued Date -
N/A
app pub date -
Oct 25, 2013
filing date -
Dec 27, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is provided with an axial fan comprising an impeller having a plurality of vanes; a motor rotating the impeller; a casing housing the impeller and the motor; a motor base mounting the motor; and a plurality of spokes connecting the motor base and the casing, wherein the motor base has a plurality of reinforcement ribs thereon, the plurality of reinforcement ribs being equal to or more than the plurality of spokes in number, and wherein the casing has a natural frequency equal to or higher than a frequency being transmitted to the casing from the motor when the motor is rotated at a rotation speed of 20000 rpm or more.
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