| 摘要 |
PROBLEM TO BE SOLVED: To reduce fan noise while preventing a size of an air blower from becoming large in an axial direction of a fan.SOLUTION: A ring outer periphery part 161 of a shroud 16 forms a recess space 16a recessed against one side surface 224 of a flange 222 and a shroud wind guiding surface 162a over a range from an outer peripheral end 226 of the flange 222 to an inner peripheral end 162b of a wind guide part 162 in a fan radial direction DRr. Accordingly, since the shroud 16 is constituted in such a way that the inner peripheral end 162b of the wind guide part 162 is released to outside in a radial direction, it is possible to reduce interference between the shroud 16 and the vane end eddy. As a result, it is possible to reduce fan noise caused by the vane end eddy while preventing an expansion of a size of an air blower 10 at a fan axial direction DRa.SELECTED DRAWING: Figure 2 |
