CENTRIFUGAL FAN
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United States of America Patent
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Issued Date -
Jun 27, 2013
app pub date -
Sep 12, 2012
filing date -
Dec 21, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A side wall of a centrifugal fan includes a gap expanding portion arranged to gradually expand a gap between an impeller and the side wall from an upstream end toward a downstream end with respect to a rotation direction of a rotating portion. In the centrifugal fan, an electronic component arranging portion of a board is arranged in an area surrounded by the gap expanding portion, the impeller, and an air outlet, and accordingly does not overlap with a motor or the impeller in an axial direction. The electronic component arranging portion is arranged in an area extending, in a circumferential direction about a central axis, from a position 180 degrees upstream from a middle of the air outlet downstream to the middle of the air outlet, that is, in an area where a wind channel has a large width.
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