Title:
VENTILATION-TYPE SILENCER
Document Type and Number:
WIPO Patent Application WO/2024/070160
Kind Code:
A1
Abstract:
Provided is a ventilation-type silencer capable of reducing occurrence of wind noise and pressure loss in a flow path space while suppressing occurrence of condensation in a back space. This ventilation-type silencer has an inlet-side vent pipe, an expanded portion 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 expanded portion and having a smaller cross-sectional area than the expanded portion. The ventilation-type silencer is provided with: a flow path wall that is disposed in the expanded portion, allows the inlet-side vent pipe and the outlet-side vent pipe to communicate with each other, and includes a porous sound absorbing material in at least part thereof; and a back space that is located on the opposite side from the flow path space within the flow path wall with the flow path wall interposed therebetween, and demarcated by the flow path wall and a housing of the expanded portion. The porous sound absorbing material has one or more communication paths that allow the flow path space and the back space to communicate with each other.
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Inventors:
HAKUTA SHINYA (JP)
ISHIGE SHUN (JP)
SUGAWARA YOSHIHIRO (JP)
TAKAHASHI TOMOHIRO (JP)
YAMAZOE SHOGO (JP)
ITAI YUICHIRO (JP)
ISHIGE SHUN (JP)
SUGAWARA YOSHIHIRO (JP)
TAKAHASHI TOMOHIRO (JP)
YAMAZOE SHOGO (JP)
ITAI YUICHIRO (JP)
Application Number:
PCT/JP2023/026988
Publication Date:
April 04, 2024
Filing Date:
July 24, 2023
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G10K11/16
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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