| 摘要 |
PURPOSE:To drain a frame body without causing contamination of a ceiling surface or a lowering in the appearance of the ceiling surface, by providing a boss part with a drain hole which pierces the frame body vertically so that water present on the frame body is led through the drain hole to the side of a decorative cover. CONSTITUTION:In the condition where water condensation occurs on a main body 13 of a ventilation fan, water dripping from the main body 13 is received by a frame body 18, and is then led to the side of a decorative cover 25 through drain holes 24 formed in boss parts 23. Consequently, it is unnecessary to provide the frame body 18 with a notched part for draining. Therefore, there is no possibility that a ceiling surface may be contaminated due to unintentional airflow or the appearance of the ceiling surface may be lowered. |
