| 摘要 |
PROBLEM TO BE SOLVED: To provide an air blower comprising a plurality of supply openings, capable of adjusting a ratio of blown-out air quantities among the supply openings without accompanying the lowering of air blowing efficiency, the lowering of the air quantity and the increase of noise. SOLUTION: This air blower 1 has a fan casing 10 comprising the supply openings 12, 13. A centrifugal fan 20 mounted in the fan casing 10 is rotated by a motor 30. The ratio of air blowing quantities of the supply openings 12, 13 is changed by the forward or backward rotation of the centrifugal fan 20. COPYRIGHT: (C)2003,JPO
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