Centrifugal fan
AssigneeNidec Corporation
InventorsKazumi Takeshita, Junpei Kitamura
Life of this patent
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Abstract
Slim-profile centrifugal fan made up of a housing, a motor component, and a airflow-generating component. A disk portion, a cylindrical portion, a plurality of posts, and a plurality of blades compose the airflow-generating component. The plurality of posts project from, and are arranged at a predetermined circumferential spacing along, the outer circumferential surface of the cylindrical portion; and each of the plurality of blades is provided on a respective one of the posts. The posts are of sufficiently greater thickness than the blades. Accordingly, air spaces are formed in between the posts and the blades, yet the blades are retained firmly on the cylindrical portion by the posts.
Claims16
A slim-profile centrifugal fan comprising:
- a housing;
- a motor component supported in said housing, said motor component having
- a stator and a rotary section, furnished with a rotor magnet, rotative about a rotational axis;
- and
- an airflow-generating component fixed to said rotary section, said airflow-generating component having
- a disk portion centered on the rotational axis and defining an axial upper end of said airflow-generating component,
- a cylindrical portion extending down from the rim of said disk portion,
- a plurality of circumferentially evenly spaced posts projecting outward, orthogonal to the rotational axis, from the outer circumferential surface of said cylindrical portion and
- blades each fixed to a respective outer peripheral end of each of said posts, said airflow-generating component being configured so that, with the rotational axial height of said posts being d1, the circumferentially circumscribed width of said posts orthogonal to the height d1 being e1, the thickness of said blades being d2, and the rotational axial height of said blades in the vicinity of the portion of said blades that is fixed to the posts being h3, then d1<h3 and e1>d2.
Dependencies are inferred from the claim text.