| 摘要 |
PURPOSE:To prevent water fed from an air intake port or an air exhaust port at washing time from entering a bearing by providing a draining unit to surround at least the upper half of a rotational shaft of a bearing bracket or a housing. CONSTITUTION:The exterior of a frame 11 is contaminated at the maintenance time, and when it is removed at washing time, water is fed through an air exhaust port 9 provided at the frame 11 into the interior. Part of the fed water passes a gap between the frame 11 and a self-ventilation fan 2 along the inner wall of a bearing bracket 5 toward a bearing labyrinth portion. Since a draining unit 20 is, however, so provided as to surround the entire periphery of a rotational shaft 3 near the bearing labyrinth portion of the bracket 5, the water flowed along the inner wall of the bracket 5 is deflected by the unit 20, and exhausted externally from the port 9. |
