Sanyo Electric Co., Ltd.

Noriyuki Nabeshima

Michihiro Kurokawa

Shigeya Ishigaki

Tomohito Koizumi

Kenji Nasako

Kenji Ueyama

Kiyoshi Koyama

Yoshinori Toya

Tomohito Takada

Katuyoshi Oki

An impeller for use in a centrifugal blower comprises a hub for receiving a driving torque at a central portion thereof, a shroud of a ring-like shape in plane formed with an opening for air intake at the center thereof and opposed to the hub across a required distance therebetween, and a plurality of vane members interposed between the hub and shroud as circumferentially spaced from one another at required intervals, the impeller having an arrangement wherein an leading edge of each vane member has varied angles (inlet angles) with respect to a tangent line thereat thereby conforming to inflow angles of an air flow guided by the vane member at different points of a span between the shroud and hub.

Impeller for a centrifugal blower

A number of vanes 12 are disposed in a peripheral direction of a plurality of supporting disks disposed along a rotary shaft 14 at given intervals. Each vane 12 is disposed at an angular interval as determined by a logistic representation. Thereby the intensity and variations of noise levels at around 8N on the low-frequency side, as well as the noise level caused by rotary first-order sounds, can be reduced.

Cross-flow fan and an air-conditioner using it

Growing community of inventors

Hirakata, Japan

Noriyuki Nabeshima