Title:
FAN, BLOWER, AND ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2018/127970
Kind Code:
A1
Abstract:
Provided is a centrifugal fan (10) in which: one blade from among 11 blades is configured as a reference blade (W1); a first pitch angle (θ1) is formed between the reference blade (W1) and a blade that is adjacent in a first direction (X) around a rotation shaft (30); and five of the first pitch angles (θ1) are arranged adjacently in the first direction (X). A second pitch angle (θ2) which differs from the first pitch angle (θ1) is formed between the reference blade (W1) and a blade that is adjacent in a second direction (Y) opposite the first direction (X), and six of the second pitch angles (θ2) are arranged adjacently in the second direction (Y). A first combined pitch angle obtained by adding up the five first pitch angles (θ1) and a second combined pitch angle obtained by adding up the six second pitch angles (θ2) are different from each other, and thus the noise of the centrifugal fan (10) is reduced.
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| JPH0791391 | CROSS-FLOW FAN |
| WO/2007/085798 | IMPROVED IMPELLER AND FAN |
| WO/2007/057292 | RADIAL COMPRESSOR ROTOR |
Inventors:
OKUDE YUSUKE (JP)
HAGA SEIJI (JP)
HAGA SEIJI (JP)
Application Number:
PCT/JP2017/000271
Publication Date:
July 12, 2018
Filing Date:
January 06, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F04D29/30; F04D29/34; F04D29/66
Foreign References:
| JP2003269363A | 2003-09-25 | |||
| JP2005282500A | 2005-10-13 | |||
| JP2015228768A | 2015-12-17 | |||
| US1893184A | 1933-01-03 | |||
| JPH05195996A | 1993-08-06 | |||
| JP2011231775A | 2011-11-17 | |||
| JPS5716297A | 1982-01-27 | |||
| GB2046360A | 1980-11-12 |
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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