| 摘要 |
PURPOSE:To integratedly form plural ring parts which prevent the entry of fingers and foreign matters by connecting plural stays for connecting a shroud part around an axial flow fan and a support part to each other by forming the shroud, a support part for supporting a driving source, and a leg part extending to the air intake side from the shroud part, and respective stays, so as to prevent the entry of fingers and foreign matters from the periphery of the axial flow fan and suppress fan noise. CONSTITUTION:At a part to a leg part 14 which extends to the air intake side from a shroud part 5, pin-shaped ribs 17 parallel to the axial direction of an axial flow fan 2 are formed integratedly with the shroud part 5. The ribs 17 are formed by the secondary mold which is released to the air in-flow side which forms the increase in the diameter of a bell-mouth part 10. Therefore, the ribs 17 permits its sectional shape to be formed freely, and can be formed on the outer periphery side of the bell-mouth 10, so a distance A between the axial flow fan 2 and the rib 17 is increased. It is, thus possible to decrease fan noise.
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