| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor fan increased in air-blasting efficiency, and capable of preventing airtightness from being degraded by drop out of a fixing part even when large force is acted on a sealing part of a fan case spacer. SOLUTION: This motor fan is structured such that a plurality of small projecting parts 13 are formed at a part contacting the fan case spacer 9 in an intake opening of a fan case 7; and the small projecting parts 13 are pressed in and engaged with the fan case spacer 9 by minute rotation of the sealing part 8 of the fan case spacer 9 contacting a suction port 11 of an impeller 5. Thereby, even if the sealing part 8 is brought into contact with and pressed in the suction port 11 of the impeller 5, and large force acts on the sealing part 8, large force does not act on the fixing part 12 of the fan case spacer 9 by increasing fixing force by pressing and engaging the plurality of small projecting parts 13 of the fan case 7 in/with the fan case spacer 9, whereby the fixing part 12 is prevented from coming off, airtightness is secured, air-blowing efficiency is increased, and thereby the motor fan high in suction performance can be provided. COPYRIGHT: (C)2008,JPO&INPIT
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