Title:
MUFFLER-EQUIPPED BLOWER AND PROPELLER-EQUIPPED MOVING BODY
Document Type and Number:
WIPO Patent Application WO/2021/193755
Kind Code:
A1
Abstract:
Provided is a muffler-equipped blower that suppresses amplification of wind noise and can suitably muffle sound generated by a fan. The blower comprises a fan and a muffler that muffles sound generated by the fan. The muffler has resonance characteristics and is disposed at a position connected to a sound field space of the sound generated by the fan. The total of the absorption rate and the reflectance at the resonance frequency of the muffler is 10-43%, and the standardized full width at half maximum is greater than 0.05 and less than or equal to 0.25.
Inventors:
HAKUTA SHINYA (JP)
YAMAZOE SHOGO (JP)
SUGAWARA YOSHIHIRO (JP)
OHTSU AKIHIKO (JP)
YAMAZOE SHOGO (JP)
SUGAWARA YOSHIHIRO (JP)
OHTSU AKIHIKO (JP)
Application Number:
PCT/JP2021/012358
Publication Date:
September 30, 2021
Filing Date:
March 24, 2021
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
F04D29/54; F04D25/08; G10K11/16; G10K11/172
Domestic Patent References:
| WO2014006650A1 | 2014-01-09 | |||
| WO2020036031A1 | 2020-02-20 | |||
| WO2020036029A1 | 2020-02-20 |
Foreign References:
| JPH04265500A | 1992-09-21 | |||
| JP2020040511A | 2020-03-19 | |||
| JP2005248734A | 2005-09-15 |
Other References:
J. ACOUST. SOC. JPN., vol. 11, no. 1, 1990, pages 19 - 24
See also references of EP 4130490A4
See also references of EP 4130490A4
Attorney, Agent or Firm:
NAKASHIMA Junko et al. (JP)
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