| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact centrifugal fan having a housing of the shape specified to an almost square shape, improving air flow characteristics without impairing the air flow characteristics and to sufficiently secure a mounting space for electronic parts. SOLUTION: In the centrifugal fan, a virtual circle described by the maximum diameter of an impeller is represented as Q, among tangential lines to the virtual circle Q, the line parallel to a side forming an exhaust opening of the housing is represented as T, a contact between the tangential line T and the virtual circle Q is represented as P, the shortest distance from the contact P to the side forming the exhaust opening is represented as a, and the shortest distance from a side forming an outer wall 3223 facing the exhaust opening to a curve formed by an inner peripheral wall is represented as b. At this time, a relationship of a<b is satisfied. COPYRIGHT: (C)2011,JPO&INPIT
|
