| 摘要 |
PURPOSE:To drastically improve noise of the impeller of an axial blower to its lower level by providing a blade sectional shape by which the separation is not easily generated even if the fluctuation of air flow to flow into the impeller is generated. CONSTITUTION:The sectional shapes of a plurality of blades 3 for constituting an impeller 5 are formed into a thick blade shape, when the outside diameter of the impeller 5 is taken as D and the hub diameter is taken as d, the blade maximum thick position L in the blade section of the part where the radius R=((D<2>+d<2>))<0.5>/2 is set to 5 to 25% of the blade chord length C of the same blade section. |
