| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation fan in which an impeller can be detached by a simple operation.SOLUTION: A ventilation fan includes an impeller rotation stopping part 7, a fan boss 3 having a movably holding part 5 which is engaged with an impeller 4 to hold it, a rotation stopper part 8 to be assembled to the fan boss 3, and the impeller 4 having a holding part 6 to be engaged with the movably holding part. In the ventilation fan, the impeller 4 mounted by the movably holding part 5 of the fan boss 3 is subjected to cancellation of the engagement of the impeller 4 with the movably holding part 5 by inward picking the movably holding part 5 of the fan boss 3, and the impeller 4 can be attached/detached without using any tool. |
