| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent intrusion of dust into the inside of a motor of a blower to prevent trouble of a circuit board caused by motor locking and dust. <P>SOLUTION: A stator 8 or the like is arranged in the inside of an impeller cup 2 opening one end side having a blade part 1 at the outer periphery. The circuit board 9 is arranged on one end side in the axial direction of the stator 8. A board cover C is arranged by covering the circuit board 9 and facing an opening of the impeller cup 2, and a ring-like ring body R is mounted at an opening end 2c of the impeller cup 2. An extension part 25 of the board cover C and a protruding part 31 of the ring body R oppose for each other in the radial direction to form a minute clearance 32 (a labyrinth seal) so that intrusion of dust into the inside of the impeller cup 2 is prevented and, for example, the blower is suitable for cleaning by a filter automatic cleaning device S for the air conditioner. <P>COPYRIGHT: (C)2009,JPO&INPIT |
