| 摘要 |
PROBLEM TO BE SOLVED: To provide a blower capable of certainly reducing noise without greatly lowering intake efficiency. SOLUTION: The blower comprises a circular rotating base plate 10a; a large number of blades 15 raised on a peripheral edge portion of the rotating base plate 10a at regular intervals; a centrifugal fan 10 having an annular blade coupling plate 10b integrally formed on upper end portions of these blades 15; and case 13 storing the the centrifugal fan 10, formed with a sucking port 11 for sucking air from one side in an axial direction, and guiding air sucked by the centrifugal fan 10 in a tangential direction of the tangential fan 10 along an inner wall surface. Between the blades 15, 15, a plurality of rectification pieces 17 turned in a fan rotating direction X2 is provided so as to be generally parallel with a blade width direction Y2. On an air discharge port 17b side in these rectification pieces 17, a recessed portion 18 turned to an air inflow port 17a side is provided. COPYRIGHT: (C)2006,JPO&NCIPI
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