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：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.

公开(公告)号：US20240255176A1

公开(公告)日：2024-08-01

申请号：US18631467

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: An object is to provide a ventilation system that can suppress generation of a pressure loss and wind noise in a silencer.
The ventilation system of the present invention has the silencer disposed at an intermediate position of a ventilation path. In a housing of the silencer, an in-housing ventilation path extending from an inlet opening to an outlet opening is surrounded by a sound absorbing member. The ventilation path has a first ventilation path that is adjacent to the inlet opening and that is continuous to the in-housing ventilation path and a second ventilation path that is adjacent to the outlet opening and that is continuous to the in-housing ventilation path. The farther from the in-housing ventilation path, the smaller a size of a cross section of at least one ventilation path of the first ventilation path or the second ventilation path. A size of a cross section of an end of at least one of the ventilation paths on an in-housing ventilation path side and a size of an opening of the inlet opening or the outlet opening, which is adjacent to the end, are identical to each other.

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.