Minebea Company, Limited

Minebea Motor Manufacturing Corporation

Mineabea Co., Ltd.

Yoichi Kawai

Masaki Ogushi

Takako Fukuda

Naoya Ohki

Takako Otsuka

Atsushi Taroda

Takayuki Mashima

A axial flow fan includes an impeller having a plurality of blades, a motor arranged to rotate the impeller, and a casing accommodating the impeller and the motor. The casing includes a cylindrical housing, a motor base configured to hold the motor, and a plurality of spokes connecting the housing with the motor base. The plurality of spokes include a spoke having a straight shape and a spoke having a curved shape that is convex toward a rotational direction of the impeller. The axial flow fan further includes a lead wire for supplying electric power to the motor. When a radial length of the spoke having the straight shape is defined as L and an amount of the curvature of the spoke having the curved shape is defined as X, a displacement of the curved shape (X/L) is less than 0.2.

Axial flow fan

A fan device includes a rotorand recessesto be filled with claylike weights. The rotorincludes an impellerand a shaft. The impellerhas a huband vanes. The recessesare provided on a surfacethat crosses an axial direction of the hub. Each recesshas a first areaand a second area. The first areais circumferentially arranged and extends in a substantially circumferential direction. The second areais connected to an outer circumferential side of the first areaand has a shorter length in the circumferential direction than the first area. The weightis closely adhered to wall surfacesandformed along a radial direction in the second areaso as to prevent separation thereof.

Fan device

An axial fan is provided. The axial fan includes a hub, an impeller having a plurality of blades mounted on an outer peripheral surface of the hub, and a housing surrounding the impeller. Each of the blades has a front edge angle (&#x3b1;) within a range of &#x2212;8&#xb0; to &#x2212;20&#xb0;, a mounting angle (&#x3b2;) within a range of 36&#xb0; to 50&#xb0;, and a twisted angle (&#x3b8;) within a range of 10&#xb0;&#xb1;2&#xb0;.

Axial fan

Axial-flow blower

Growing community of inventors

Kitasaku-gun, Japan

Yoichi Kawai