公开(公告)号：US20240426514A1

公开(公告)日：2024-12-26

申请号：US18829482

申请日：2024-09-10

Applicant: FUJIFILM Corporation

Inventor： Shinya Hakuta ,  Shogo YAMAZOE ,  Yuichiro ITAI ,  Yoshihiro SUGAWARA

IPC: F24F13/24

Abstract: There is provided a ventilation-type silencer that uses a porous sound absorbing material and has high sound deadening performance in a low frequency band. A ventilation-type silencer includes an inlet-side vent pipe, an expansion section that communicates with the inlet-side vent pipe and has a cross-sectional area larger than a cross-sectional area of the inlet-side vent pipe, and an outlet-side vent pipe that communicates with the expansion section and has a cross-sectional area smaller than the cross-sectional area of the expansion section. The ventilation-type silencer includes a porous sound absorbing material that is disposed in at least a part of the expansion section, a back space that is a space in the expansion section formed on a side of the porous sound absorbing material opposite to a flow channel connecting the inlet-side vent pipe and the outlet-side vent pipe, and a partition member that partitions the back space. A region partitioned by the partition member forms an acoustic resonator, and the acoustic resonator is acoustically connected to the flow channel.

公开(公告)号：US20200300478A1

公开(公告)日：2020-09-24

申请号：US16895544

申请日：2020-06-08

Applicant: FUJIFILM Corporation

Inventor： Shogo YAMAZOE ,  Yoshihiro SUGAWARA

IPC: F24C15/20 ,  F24F13/24

Abstract: Provided is a range hood that is small, that can reliably provide the flow path for waste smoke, that has high soundproof performance, and that allows oil stains and the like to be easily removed. The range hood includes: a suction portion that has a suction opening and that sucks air from below in a vertical direction; a connection opening connected to the suction portion; a duct portion that conveys air sucked from the connection opening and discharges the air from a discharge opening to an outside; an air blowing mechanism that is disposed in the duct portion and that moves air in the duct portion to the discharge opening; and a flow regulation plate that is disposed in the suction opening of the suction portion or is disposed so as to cover a part of the suction opening. A distance between the suction portion and the flow regulation plate is 110 mm or smaller. The range hood has at least one soundproof structure on a surface of the flow regulation plate on the suction portion side between the flow regulation plate and the suction portion.

公开(公告)号：US20200234687A1

公开(公告)日：2020-07-23

申请号：US16838497

申请日：2020-04-02

Applicant: FUJIFILM Corporation

Inventor： Akihiko OHTSU ,  Shinya HAKUTA ,  Shogo YAMAZOE ,  Yoshihiro SUGAWARA

IPC: G10K11/172 ,  G10K11/168 ,  F24F13/24 ,  F01N1/02

Abstract: A soundproof structure body includes a first tube structure and a second tube structure connected to the first tube structure and having a cross-sectional area different from the first tube structure, in which a structure body having a cross-sectional area smaller than a cross-sectional area of the first tube structure is installed in the first tube structure, and a transmission loss in a case where the structure body is installed in the first tube structure with respect to a case where the structure body is not installed in the first tube structure is positive at two frequencies adjacent to each other and difficult to generate an air column resonance mode in the first tube structure. This soundproof structure body generates a soundproof effect even at frequencies other than air column resonance of a tube structure such as a duct or a muffler, has a small size, and can obtain a high transmission loss in a wide-band.

公开(公告)号：US20240255177A1

公开(公告)日：2024-08-01

申请号：US18631524

申请日：2024-04-10

Applicant: FUJIFILM Corporation

Inventor： Shogo YAMAZOE ,  Yuichiro ITAI ,  Shinya HAKUTA ,  Yoshihiro SUGAWARA ,  Tomohiro TAKAHASHI

IPC: F24F13/24

CPC classification number: F24F13/24 ,  F24F2013/242

Abstract: Provided is a ventilation system in which a silencer has a compact structure, a silencing property is ensured, and a pressure loss in the silencer is suppressed.
The ventilation system of the present invention has a silencer disposed at an intermediate position of a ventilation path. In the silencer, a sound absorbing member surrounds a housing in which an in-housing ventilation path extending from an inlet opening to an outlet opening is provided. In addition, an upstream tube body that forms an upstream ventilation path on an upstream side of an inlet opening, a downstream tube body that forms a downstream ventilation path on a downstream side of an outlet opening, a tubular first connecting portion that is connected to the upstream tube body and that links the upstream ventilation path and the inlet opening to each other, and a tubular second connecting portion that is connected to the downstream tube body and that links the downstream ventilation path and the outlet opening to each other are provided. Each of the first connecting portion and the second connecting portion includes an opening portion therein. The closer to the in-housing ventilation path, the smaller a size of a cross section of the opening portion of at least one connecting portion.

公开(公告)号：US20240183576A1

公开(公告)日：2024-06-06

申请号：US18442971

申请日：2024-02-15

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Yoshihiro SUGAWARA ,  Yuichiro ITAI

IPC: F24F13/24

CPC classification number: F24F13/24 ,  F24F2013/242 ,  F24F2013/245

Abstract: A silencer for a ventilation passage effectively deadens sound having a broad frequency band while having a compact structure.
A silencer for a ventilation passage according to an embodiment of the present invention is a silencer for a ventilation passage that includes a housing and deadens sound in a ventilation passage, and an internal space of the housing forms a part of the ventilation passage. The silencer for a ventilation passage includes an inlet opening that is positioned on one end side of a part of the ventilation passage in the housing, an outlet opening that is positioned on the other end side of a part of the ventilation passage in the housing, a sound absorbing member that is housed in the housing, and a vibration portion that is provided on the housing and reduces sound passing through the ventilation passage.

公开(公告)号：US20240011652A1

公开(公告)日：2024-01-11

申请号：US18469657

申请日：2023-09-19

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Yoshihiro SUGAWARA ,  Yuichiro ITAI

IPC: F24F7/04 ,  G10K11/16

CPC classification number: F24F7/04 ,  G10K11/16

Abstract: To effectively reduce a low-frequency noise resulting from vibration of a peripheral wall of a ventilation path.
The present invention provides a ventilation path with a soundproof structure including a ventilation path that includes an open end and a soundproof structure against a sound emitted from the ventilation path. The soundproof structure includes a vibration suppression portion that is provided on a surface of a peripheral wall surrounding the ventilation path, and assuming that m and n are natural numbers of 4 or less, λ is a wavelength of a sound of which a frequency coincides with an m-th natural frequency of the peripheral wall alone, and L1 is a distance from the open end on a virtual line extending through a central position of a cross section of each portion of the ventilation path, the cross section intersecting a direction in which the ventilation path extends, the vibration suppression portion is present in an area at which a distance L1 is equal to or greater than (4n−3)/×λ/8 and equal to or smaller than (4n−1)×λ/8.

公开(公告)号：US20220389938A1

公开(公告)日：2022-12-08

申请号：US17886556

申请日：2022-08-12

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Yoshihiro SUGAWARA ,  Akihiko OHTSU

IPC: F04D29/66 ,  F04D19/00 ,  F04D29/54

Abstract: An axial fan that includes a casing having an inner space that penetrates in one direction, and a rotor blade disposed in the inner space of the casing, and a silencer that is disposed at a position connected to the inner space of the axial fan are provided, in which the axial fan has a sound pressure distribution having a position at which a sound pressure is high and a position at which the sound pressure is low in a circumferential direction in the inner space during driving, and the silencer is disposed at the position of the axial fan in the circumferential direction at which the sound pressure is high and is not disposed at the position at which the sound pressure is low.

公开(公告)号：US20210233506A1

公开(公告)日：2021-07-29

申请号：US17232770

申请日：2021-04-16

Applicant: FUJIFILM Corporation

Inventor： Akihiko OHTSU ,  Shinya HAKUTA ,  Yoshihiro SUGAWARA ,  Shogo YAMAZOE

IPC: G10K11/172 ,  G10K11/16 ,  F24F13/24

Abstract: In a soundproof structure body including a tubular tube body having an opening portion, and a resonance type soundproof structure, in which a phase difference θ, at an upstream of the resonance type soundproof structure, between a reflected wave in the resonance type soundproof structure and a reflected wave of a transmitted wave transmitted through the resonance type soundproof structure and reflected by the opening portion satisfies Inequation |θ−π|≤π/3 with respect to a resonance frequency of the resonance type soundproof structure. This soundproof structure body can effectively offset a reflected wave from a resonance type soundproof structure body by opening end reflection by appropriately specifying positions of the resonance type soundproof structure and the opening end portion of a duct, a tube line, or the like to improve an absorbance of a single resonance type soundproof structure.

公开(公告)号：US20250003631A1

公开(公告)日：2025-01-02

申请号：US18885817

申请日：2024-09-16

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Yuichiro ITAI ,  Yoshihiro SUGAWARA

IPC: F24F13/24

Abstract: A ventilation type silencer includes a ventilation channel in which at least a part of a side wall of a flow channel of a gas is formed of a porous sound absorbing material, in which a flow resistance of the sound absorbing material is 1000 Rayls/m or more, porosity of the sound absorbing material on at least a flow channel surface side is 0.9 or less or permeability thereof is 3.0×10−9 m2 or less, and a minimum flow channel width on a cross section perpendicular to a flow direction of the gas in the ventilation channel is 100 mm or less. As a result, the ventilation type silencer is provided, which includes the porous sound absorbing material that can be appropriately selected for the flow channel of the gas in accordance with hydrodynamic characteristics of the sound absorbing material in a case in which the porous sound absorbing material is used in at least a part of the flow channel, that can suppress a pressure loss, and that can reduce a wind noise.

公开(公告)号：US20240393008A1

公开(公告)日：2024-11-28

申请号：US18796970

申请日：2024-08-07

Applicant: FUJIFILM Corporation

Inventor： Shogo YAMAZOE ,  Tomohiro TAKAHASHI ,  Shinya HAKUTA ,  Yuichiro ITAI ,  Yoshihiro SUGAWARA

IPC: F24F13/24

Abstract: There is provided a wind duct with a silencer that can efficiently reduce sound propagated to a blowing target in consideration of noise generated in a wind duct during blowing.
The wind duct with a silencer of the present invention includes the wind duct that is connected to a blowing source and a silencer that reduces sound released from an exit of the wind duct. A frequency of a primary silencing peak of the silencer is lower than a frequency at which intensity of sound generated in the wind duct due to blowing in the wind duct is maximum.