公开(公告)号：US20220389939A1

公开(公告)日：2022-12-08

申请号：US17887119

申请日：2022-08-12

Applicant: FUJIFILM Corporation

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

IPC: F04D29/66 ,  F04D29/54 ,  F04D19/00 ,  B64C39/02

Abstract: A fan, and a silencer that silences a sound generated by the fan are provided, in which the silencer has a resonance characteristic, the silencer is disposed at a position connected to a sound field space of the sound generated by the fan, and a sum of an absorbance and a reflectivity of the silencer at a resonance frequency is 10% to 43% and a standardized half-width of the silencer is more than 0.05 and 0.25 or less.

公开(公告)号：US20220357075A1

公开(公告)日：2022-11-10

申请号：US17870267

申请日：2022-07-21

Applicant: FUJIFILM Corporation

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

IPC: F24F13/24

Abstract: A silencing device and an air supply system according to an embodiment of the present invention include a resonance silencer provided at a position connected to a space in which the sound source is located within the air supply system in order to silence the noise generated from the sound source in the housing, in which in a case where a resonance wavelength of the resonance silencer alone is denoted by λ, a distance by which the resonance silencer is separated from the sound source is less than λ/2. A fundamental resonance frequency of the resonance silencer is equal to or less than an acoustic upper limit frequency determined according to a size of the housing.

公开(公告)号：US20210012762A1

公开(公告)日：2021-01-14

申请号：US17039072

申请日：2020-09-30

Applicant: FUJIFILM Corporation

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

IPC: G10K11/172 ,  F24F13/24

Abstract: Provided is a soundproof structure body including an opening member that forms an opening tube line having a cross-sectional area S, and at least two resonance structures for sound waves that are installed inside the opening tube line, and in a case where a cross-sectional area of the resonance structure is defined as Si, a width thereof is defined as di, an interval between the two resonance structures is defined as L, an impedance of the two resonance structures is defined as Zi, and a synthetic acoustic impedance is defined as Zc, a condition of Expression (1) is satisfied at a resonance frequency f0 at which a theoretical absorption value At is a maximum value. This soundproof structure body can realize high absorption using a plurality of resonance structures. At (f0, L, S, Si, di, Zi)>0.75  (1), Here, L>0, S>0, Si (i=1, 2)>0, di (i=1, 2)>0

公开(公告)号：US20240393001A1

公开(公告)日：2024-11-28

申请号：US18798340

申请日：2024-08-08

Applicant: FUJIFILM Corporation

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

IPC: F24F13/02 ,  E04F17/04 ,  F24F13/24

Abstract: There is provided a wind duct with a silencer that can efficiently reduce sound propagated to a blowing target including 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. The silencer is disposed at a position closer to the exit among the blowing source and the exit, and a frequency of a primary silencing peak of the silencer is within a frequency band of sound generated in the wind duct due to blowing in the wind duct.

公开(公告)号：US20240255178A1

公开(公告)日：2024-08-01

申请号：US18632651

申请日：2024-04-11

Applicant: FUJIFILM Corporation

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

IPC: F24F13/02

CPC classification number: F24F13/0263

Abstract: Provided is an air passage type silencer that can drain water from the inside of an expansion portion and that can suppress generation of a wind noise. An air passage type silencer includes an inlet-side ventilation pipe, an expansion portion that communicates with the inlet-side ventilation pipe and of which a cross-sectional area is larger than a cross-sectional area of the inlet-side ventilation pipe, an outlet-side ventilation pipe that communicates with the expansion portion and of which a cross-sectional area is smaller than a cross-sectional area of the expansion portion, an opening portion structure that is provided at at least one of a connection portion between the expansion portion and the inlet-side ventilation pipe or a connection portion between the expansion portion and the outlet-side ventilation pipe and of which a cross-sectional area gradually increases from the connection portion toward an inside of the expansion portion, and a sound absorbing material that is disposed at least between an inner peripheral surface of the expansion portion and a distal end of the opening portion structure. The opening portion structure includes a cutout portion formed from the distal end to a root side at a portion of a peripheral surface, and a width of the cutout portion gradually increases from the root side toward the distal end.

公开(公告)号：US20240183569A1

公开(公告)日：2024-06-06

申请号：US18439877

申请日：2024-02-13

Applicant: FUJIFILM Corporation

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

IPC: F24F13/02 ,  F24F13/24

CPC classification number: F24F13/0209 ,  F24F2013/242

Abstract: To provide an air passage type silencer that can suppress generation of a wind noise, that has a high sound attenuation effect in a low-frequency band, and that has high air passage performance. The air passage type silencer includes an inlet-side ventilation pipe, an expansion portion that communicates with the inlet-side ventilation pipe and of which a cross-sectional area is larger than a cross-sectional area of the inlet-side ventilation pipe, an outlet-side ventilation pipe that communicates with the expansion portion and of which a cross-sectional area is smaller than a cross-sectional area of the expansion portion, an opening portion structure of which a cross-sectional area gradually decreases from an inside of the expansion portion toward a connection portion between the expansion portion and the outlet-side ventilation pipe, a rear surface space that is surrounded by the opening portion structure, a side surface of the expansion portion that is on an outlet-side ventilation pipe side, and a peripheral surface of the expansion portion, and a porous sound absorbing material that is disposed at least in an opening portion of the rear surface space.

公开(公告)号：US20220010813A1

公开(公告)日：2022-01-13

申请号：US17487189

申请日：2021-09-28

Applicant: FUJIFILM Corporation

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

IPC: F04D29/66 ,  H02K7/00 ,  H02K7/14 ,  H02K5/04 ,  F04D19/00 ,  F04D29/52

Abstract: A blower with a silencer has the blower including an axial fan including a casing, a motor attached to the casing, and a rotor having a shaft portion attached to the motor and rotated and a blade formed to protrude to an outer side of the shaft portion in a radial direction, and a silencer attached to the casing, in which the silencer includes a resonator that selectively silences a dominant sound generated by the axial fan, the silencer is disposed at a position in which at least a part of the silencer overlaps with the shaft portion, as viewed from a rotation axis direction of the rotor, and in a case in which, in a cross section perpendicular to a rotation axis of the rotor, a circle around the rotation axis, which has a radius of a line connecting the rotation axis and a point of a most distal end of the blade, is defined as a rotation region, an area of the silencer in the cross section perpendicular to the rotation axis is smaller than an area of the rotation region.

公开(公告)号：US20210164691A1

公开(公告)日：2021-06-03

申请号：US17175445

申请日：2021-02-12

Applicant: FUJIFILM Corporation

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

IPC: F24F13/24 ,  F24F13/02 ,  E04B1/86 ,  G10K11/172

Abstract: An object is to provide a silencing system that includes a silencer disposed in a ventilation sleeve, can suppress the generation of negative pressure in the interior, and can prevent a door or the like of an interior entrance from being difficult to open. The silencing system includes one or more silencers that are disposed in a ventilation sleeve provided to penetrate a wall separating two spaces, and “αA>10C−(0.1/P)×TL” is satisfied in a case where a gap equivalent area of the ventilation sleeve in which the silencer is installed is denoted by αA and a normalized sound transmission loss in an octave band in which a first resonant frequency of the ventilation sleeve is present is denoted by TL.
C denotes a constant determined by a measurement system in a case where there is no silencer and P denotes a transmission efficiency coefficient.

公开(公告)号：US20210164690A1

公开(公告)日：2021-06-03

申请号：US17174435

申请日：2021-02-12

Applicant: FUJIFILM Corporation

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

IPC: F24F13/24 ,  G10K11/162 ,  G10K11/172 ,  E04B1/82

Abstract: An object is to provide a silencing system that can achieve both high ventilation performance and high soundproof performance, can silence a plurality of pieces of resonant sound, and has high general-purpose properties since the silencing system does not need to be designed according to a tubular member. The silencing system includes one or more silencers that are disposed in a tubular member provided to penetrate a wall separating two spaces, and satisfies “0 0” in a case where a standardized effective modulus of elasticity in an interior space of the tubular member in which the silencers are disposed is denoted by Bn.

公开(公告)号：US20200224810A1

公开(公告)日：2020-07-16

申请号：US16829999

申请日：2020-03-25

Applicant: FUJIFILM Corporation

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

IPC: F16L55/033 ,  G10K11/162 ,  G10K11/172

Abstract: Provided is a silencing tubular structure body that has high strength and can be disposed in a narrow space. A tubular member including a tubular portion having a tubular shape, and a frame portion having at least a part formed integrally with an inner peripheral surface side of the tubular portion; and a lid member that is exchangeably disposed on an opening surface of the frame portion of the tubular member are included, in which the frame portion and the lid member form a resonant silencing structure.