Mitsubishi Electric Corporation

Hidetoshi Yamato

Daisuke Kobayashi

Hitoshi Kikuchi

Shoji Yamada

Kazuki Okamoto

Yasuyoshi Makino

Yoshihiro Kagawa

Hiromitsu Yamauchi

A ventilation fan includes: first and second electronic components attached to a back surface of a flange; a third electronic component including a claw portion on an outer portion of the third electronic component and attached to the back surface of the flange; internal wiring routed on the back surface of the flange and connecting the first and second electronic components; and a retention portion including: a first rib protruding from the back surface of the flange in a perpendicular direction to the back surface of the flange; and a second rib protruding from a side face of the first rib in a direction parallel with the plane direction of the back surface of the flange or protruding toward the back surface of the flange, the retention portion retaining the internal wiring between the undersurface of the second rib and the back surface of the flange.

Ventilation fan

A multiblade centrifugal blower includes a centrifugal fan including a hub rotated by a motor, and plural curved rectangular blades arranged at predetermined intervals in a circumferential direction of the hub forming a cylindrical basket with an opening on a front side of the hub, and a scroll casing including an air inlet and an air outlet, and houses the centrifugal fan inside to face the air inlet. A length from a rear end to an front end of an outer edge of the blade is shorter than a length from a rear end to an front end of an inner edge of the blade, and a bell mouth is configured such that distance between a tip part of the inner edge of the blade and an inner wall of the scroll casing is the minimum at an inner tip part P of the bell mouth of the air inlet.

Multiblade centrifugal blower

Growing community of inventors

Tokyo, Japan

Hidetoshi Yamato