| 摘要 |
PROBLEM TO BE SOLVED: To provide an axial fan device capable of improving the ventilation efficiency thereof. SOLUTION: The axial fan device includes: a cylindrical boss part and two or more blades 3 that extend radially from the outer peripheral surface of the boss part. By providing projections 4, which is continuous from the blade leading edge 3b to the blade trailing edge 3c of blade 3, on a pressure surface of the blade 3. As a result, the deviation of air when an axial fan is ventilated is reduced by the rectifying action of the projections 4, so that the ventilation efficiency of the axial fan device is improved. COPYRIGHT: (C)2011,JPO&INPIT
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