| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal air-blowing fan for improving air-blowing performance by increasing an air-blowing quantity while setting the number of part items and manhours in a conventional value, without being damaged even in a severe environment by firmly fixing and joining an impeller and a back yoke.SOLUTION: A centrifugal air-blowing fan includes a back yoke 25 for integrally rotating with a rotary shaft 19, by arranging a flange part 25b on the opening peripheral edge, by installing a magnet 27 of a motor 15 on an inside surface in a substantially bottomed cylindrical shape with the rotary shaft 19 of the motor 15 as the center, a resin impeller 16 formed in a cylindrical shape with a plurality of blades 21 arranged in the peripheral direction, an annular belt part 22 formed by joining one end side of the plurality of blades 21 as one and a doughnut-shaped disk part 23 formed by joining the other end side of the plurality of blades 21 as one, and projection parts 24 arranged on the disk part 23 of the impeller 16 and concentrically fixing and joining the impeller 16 and the back yoke 25 in a state of joining the disk part 23 and the flange part 25b of the back yoke 25. |
