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US 2010/0303647 A1Published application
Centrifugal fan
AssigneeNidec Corporation
InventorsKiyoto IDA, Masashi HIRAYAMA, Hiroyoshi TESHIMA
Life of this patent
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Abstract
A centrifugal fan includes a housing including a base, a side wall portion having an air outlet defined therein, and a cover arranged above the side wall portion and having an air inlet defined therein. A circuit board is arranged on an upper surface of the base, and includes a circuit board protruding portion arranged to protrude radially outward of the housing. At least one of electronic components to be mounted on the circuit board is arranged radially outward from an inner circumferential surface of the side wall portion.
Claims14
A centrifugal fan comprising:
- a hub substantially in the shape of a cylinder with a covered end centered on a central axis;
- an impeller arranged radially outward of the hub;
- a magnet attached to an inside of the hub;
- an armature arranged radially opposite the magnet;
- a bearing mechanism arranged to support the hub such that the hub is rotatable about the central axis with respect to the armature;
- a bearing housing arranged to support the bearing mechanism;
- a base arranged to support a lower end portion of the bearing housing;
- a side wall including an air outlet defined therein, and arranged radially outward of the impeller to surround the impeller;
- a cover including an air inlet defined therein, and arranged axially above the side wall;
- a housing including the base, the side wall, and the cover;
- a circuit board arranged on an upper surface of the base;
- and
- a control circuit portion including electronic components and arranged on the circuit board;
- wherein
- the circuit board includes a protruding portion arranged to protrude radially outward of an outer surface of the side wall of the housing;
- and
- at least one of the electronic components is arranged on the protruding portion.
14 more elements
Dependencies are inferred from the claim text.