Axial fan and frame thereof
AssigneeNidec Corporation
InventorsYusuke Yoshida, Hidenobu Takeshita, Hidefumi Kawakami
Life of this patent
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Abstract
An axial fan includes a motor section, an impeller, a housing, and a plurality of supporting ribs. The motor section and the impeller are disposed on the inside of the housing. In a connecting region between an inner end portion of the supporting rib and the base section, a first corner portion and a second corner portion are formed on the side of a rotational direction of the impeller and on the side opposite to the rotational direction, respectively. A curvature radius of the first corner portion is larger than a curvature radius of the second corner portion.
Claims20
A frame for an axial fan comprising:
- a housing arranged to accommodate an impeller;
- a base section disposed on an inside of the housing;
- and
- supporting ribs extending from the base section to the housing to support the base section, the supporting ribs being disposed on the inside of the housing;
- wherein
- in a connecting region between each of the supporting ribs and the base section:
- a first corner portion and a second corner portion are arranged on an upstream side and on a downstream side of a rotational direction of the impeller, respectively;
- and
- a curvature radius of the first corner portion is different from a curvature radius of the second corner portion;
- and
- each and every one of the supporting ribs inside of the housing has substantially the same shape and substantially the same dimensions such that all of the first corner portions have substantially identical curvature radii and all of the second corner portions have substantially identical curvature radii.
An axial fan comprising:
- a housing;
- a base section disposed on an inside of the housing;
- a plurality of supporting ribs extending from the base section to the housing to support the base section, the plurality of supporting ribs being disposed on the inside of the housing;
- an impeller disposed on the inside of the housing;
- and
- a motor section, supported by the base section, arranged to rotationally drive the impeller;
- wherein
- in a connecting portion between each of the plurality of supporting ribs and the base section, a first corner portion and a second corner portion are arranged on an upstream side and on a downstream side in a rotational direction of the impeller, respectively;
- a curvature radius of the second corner portion is smaller than a curvature radius of the first corner portion;
- and
- each and every one of the plurality of supporting ribs inside of the housing has substantially the same shape and substantially the same dimensions such that all of the first corner portions have substantially identical curvature radii and all of the second corner portions have substantially identical curvature radii.
Dependencies are inferred from the claim text.