| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor fan device in which a motor fan can be made compact while a suction power of the motor fan is prevented from lowering, and noise generated with operation of the motor fan can be effectively reduced.SOLUTION: Blades 82, 83 of a cover body 42 which covers at least part of a motor fan 41 are disposed outward on an exhaust side of the motor fan 41, along with part of coaxial and different spiral lines. Slits S1 which allow passage of exhaust wind from the motor fan 41 to the outside are formed between adjacent ends of the blades 82, 83 at predetermined intervals as pre-set minimum intervals. With this configuration, the motor fan 41 can be made compact while a suction power of the motor fan 41 is prevented from lowering, and noise generated with operation of the motor fan 41 can be effectively reduced. |
