Nidec Corporation

Toshikazu Fukunaga

Takaya Otsuki

Tsunenori Tatsuno

Hidenobu Takeshita

Kazumi Takeshita

Tatsuya Akase

Tomohiko Ogasawara

A blower fan includes an impeller centered on a central axis, a motor portion arranged to rotate the impeller about the central axis, and a housing arranged to accommodate the impeller. The housing includes a lower plate portion arranged to cover a lower side of the impeller and a side wall portion arranged to cover a side of the impeller. The lower plate portion is preferably made of, for example, a steel sheet. The side wall portion is preferably made of, for example, a resin. A lower end portion of the side wall portion and an edge portion of the lower plate portion are preferably joined to each other through insert molding. An outer circumferential cut surface of the lower plate portion is arranged in contact with the side wall portion at a joint between the lower end portion of the side wall portion and the edge portion of the lower plate portion.

Centrifugal fan and method for manufacturing the same

An impeller in a centrifugal fan includes a support portion having a cylindrical outer circumferential surface coaxial or substantially coaxial with a center axis and a plurality of moving blades arranged on the outer circumferential surface of the support portion independently of one another and configured to draw an air along the center axis and expel the air radially outwards when rotated about the center axis together with the support portion. At least one of the moving blades includes a first blade portion connected to, and extending radially outwards from, the outer circumferential surface of the support portion, at least one second blade portion having a radial inner end portion radially spaced apart from the outer circumferential surface of the support portion and a connecting member arranged to interconnect the first blade portion and the second blade portion.

Impeller and centrifugal fan

An axial flow fan according to the present invention comprises an impeller which rotates about a central axis and including a plurality of blades, a hollow member accommodating therein the impeller, a base portion which is arranged at the hollow member and supports the base portion in a rotatable manner, a plurality of inner air guide members each connected to the base portion, and a plurality of outer air guide members each connected to the hollow member. The inner air guide members and the outer air guide members each include a first edge member and a second edge portion. A length of the first edge member and that of the second edge member of the outer air guide member are greater than those of the first edge member and the second edge member of the inner air guide member.

Growing community of inventors

Kyoto, Japan

Toshikazu Fukunaga