Centrifugal fan
AssigneeASUSTeK COMPUTER INC.
InventorsHsin-Chen Lin, Ing-Jer Chiou
Life of this patent
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Abstract
A centrifugal fan includes a housing and an impeller. The housing includes a sidewall, and the sidewall includes a tongue portion. The impeller includes a fan hub and a plurality of blades. The fan hub is rotatably disposed in the housing, and the tongue portion has an inner contour line on a reference plane. The blades connect to the fan hub. Each one of the blades has an end surface facing the sidewall. The end surface has an outer contour line on the section of the blade. Any two adjacent blades have different outer contour lines. The outer contour line of at least one first blade of the plurality of blades is parallel to the inner contour line. The outer contour line of at least one second blade of the plurality of blades is not parallel to the inner contour line.
Claims3
A centrifugal fan, comprising:
- a housing;
- and
- an impeller, comprising:
- a fan hub, rotatably disposed in the housing along an axis, and is configured to rotate in a rotating direction;
- and
- a plurality of blades, connecting to the fan hub, the end of each one of the blades having a first extending portion and a second extending portion, the first extending portion and the second extending portion are configured along the direction of the axis, wherein for each one of the blades the second extending portion is positioned further along the direction of the axis than the first extending portion, extending directions of the first extending portion and the second extending portion are different along the rotating direction, and form an angle difference therebetween, wherein the angle differences of any two adjacent blades are different, wherein the plurality of blades comprising a first blade and a second blade, the second extending portion of the first blade is biased along the rotating direction relative to the first extending portion of the first blade, and the second extending portion of the second blade is biased opposite to the rotating direction relative to the first extending portion of the second blade.
Dependencies are inferred from the claim text.