| 摘要 |
PURPOSE:To eliminate needs for a motor supporting metal fitting which becomes air resistance so as to realize increase of wind amount and decrease of noise by fixing impellers to respective shafts of a motor having both shafts and fixing the motor between the two impellers through motor supporting posts. CONSTITUTION:The rotor 13 of a motor 11 rotates inside a stator 12. Centrifugal type impellers 16 whose motor installing sides are made concave are mounted on respective shafts 14 of the motor 11 whose shafts 14, 14 are projected from both ends. Plural motor supporting posts 18 are fixed on the outer periphery of the motor 11, and the other ends of the supporting posts 18 are fixed to a casing 17 surrounding two impellers 16 to support the motor 11 by the casing 17. The casing 17 forms suction ports 19 on both end sides in the motor shaft direction, and a blowing port 20 in the tangent direction. Thus, air resistance can be reduced and increase of wind amount and decrease of noise can be realized, by making a construction in which supporting metal fittings of the motor 11 are not provided in the suction ports 19.
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