| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation fan that is easily produced and can reduce vibration. <P>SOLUTION: The ventilation fan includes: an impeller rotating around the center axis; a motor part rotating the impeller; a motor support part 20 supporting the motor part; and a housing 30 storing the impeller and the motor part. The motor support part 20 has: a nearly disk-shaped base part 21; and a nearly cylindrical bearing holding part 22 axially extending with the center axis as the center. At least the base part 21 is made of a resin. On the surface of the base part 21, a plurality of recessed parts 23 which are axially recessed are formed in a mesh state, and a flat part 24 except recessed parts 23 of the base part 21 does not have a part continuing along a radial direction radially extending from the center of the base part 21. <P>COPYRIGHT: (C)2012,JPO&INPIT |
