| 摘要 |
An impeller of a multiblade blower having a plurality of blades with blade tips where a serrated shape is formed so that the dispersion of the position accuracy of the blades is reduced and its rotating strength is increased with less production man-hours. The impeller (7) of the blower (4) comprises resin circular support plates (31, 41) rotating around a rotating shaft and a plurality of resin blades (32, 42). The blades (32, 42) are disposed on the outer peripheral parts of the circular support plates (31, 41) to be parallel with the rotating shaft, and the serrated shape (53) cut out at multiple positions is formed at their blade tips. Then, a step (61) is formed on the blade surface of each of the blades (32, 42) at a position apart a predetermined distance from its blade tip where the serrated shape (53) is formed. ® KIPO & WIPO 2008 |
