Title:
VENTILATION-TYPE SILENCER
Document Type and Number:
WIPO Patent Application WO/2023/188924
Kind Code:
A1
Abstract:
Provided is a ventilation-type silencer using a porous sound absorbing material, the silencer having excellent sound deadening performance in a low frequency range. A ventilation-type silencer having an inlet-side vent pipe, an expansion section communicating with the inlet-side vent pipe and having a larger cross-sectional area than the inlet-side vent pipe, and an outlet-side vent pipe communicating with the expansion section and having a smaller cross-sectional area than the expansion section. The ventilation-type silencer further has: a porous sound absorbing material arranged in at least a part of the expansion section; a back space, of the porous sound absorbing material, which is the space in the expansion section opposite from a flow path connecting the inlet-side vent pipe and the outlet-side vent pipe; and a partition member that partitions the back space. The region partitioned by the partition member constitutes an acoustic resonator, and the acoustic resonator is acoustically coupled to the flow path.
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Inventors:
HAKUTA SHINYA (JP)
YAMAZOE SHOGO (JP)
ITAI YUICHIRO (JP)
SUGAWARA YOSHIHIRO (JP)
YAMAZOE SHOGO (JP)
ITAI YUICHIRO (JP)
SUGAWARA YOSHIHIRO (JP)
Application Number:
PCT/JP2023/005114
Publication Date:
October 05, 2023
Filing Date:
February 15, 2023
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G10K11/16; F24F13/02; F24F13/24; G10K11/172
Foreign References:
| JPS63186907A | 1988-08-02 | |||
| KR20190074716A | 2019-06-28 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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