| 摘要 |
<p>This ventilation device has: a main case; blades; and a motor with a rotor. The motor has: a bottom cover (8) that is provided with a bottom-cover drainage hole (10) for draining dew condensation water and a housing; and a top cover. The bottom surface of the bottom cover (8) comprises a concave section and a convex section. Additionally, a tabular insulating sheet (12), which has insulating-sheet drainage holes (13) for transferring the dew condensation water, is provided on the convex section in such a manner that the bottom-cover drainage hole (10) and the insulating-sheet drainage holes (13) do not overlap in the vertical direction.</p> |
