| 摘要 |
PURPOSE:To reduce noise to a low level, by positioning bearings of a rotary shaft of a motor, for driving an impeller, in both ends of the rotary shaft and mounting the impeller to the rotary shaft between both the bearings. CONSTITUTION:A blower provides a holding part 16 for a bearing 15 in an impeller side in the center of a casing 14 and a holding part 27 for a bearing 26 in a motor 24. An impeller 12 is arranged between both the bearings 15, 26, provided in both ends of a rotary shaft 20, being mounted to the rotary shaft 20 through a spacer 28 and a washer 29. Accordingly, unbalance of weight by the impeller is suppressed by both the bearings, and the blower, as the result, enables the decrease of noise to a low level.
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