Centrifugal fan and blower equipped with the centrifugal fan
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United States of America Patent
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Sep 19, 2023
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N/A
app pub date -
Sep 20, 2021
filing date -
Apr 25, 2019
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Abstract
A centrifugal fan sucks in air from one side in an axial direction and blows out air outward in a radial direction. A blade leading edge is connected to a cylinder inner surface of a side plate. The blade leading edge has: a tip end extended linearly by an apex of a convex surface and connected to the cylinder inner surface; and a convex surface end indicating a boundary between the convex surface and a side surface of the blade. When the cylinder inner surface has: a diameter Φa at a first position, which is an end position of the upstream tubular portion of the side plate on one side in the axial direction, a diameter Φb at a second position where the blade leading edge is connected; and a diameter Φc at a third position where the convex surface end is connected, a relationship of Φa≥Φb≥Φc is satisfied.
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