WO2023188924A1 - 通風型消音器 - Google Patents

通風型消音器 Download PDF

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Publication number
WO2023188924A1
WO2023188924A1 PCT/JP2023/005114 JP2023005114W WO2023188924A1 WO 2023188924 A1 WO2023188924 A1 WO 2023188924A1 JP 2023005114 W JP2023005114 W JP 2023005114W WO 2023188924 A1 WO2023188924 A1 WO 2023188924A1
Authority
WO
WIPO (PCT)
Prior art keywords
partition member
absorbing material
ventilation pipe
porous sound
silencer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/005114
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
真也 白田
昇吾 山添
雄一郎 板井
美博 菅原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Corp
Original Assignee
Fujifilm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujifilm Corp filed Critical Fujifilm Corp
Priority to JP2024511389A priority Critical patent/JPWO2023188924A1/ja
Priority to CN202380024311.9A priority patent/CN118843903A/zh
Priority to EP23776811.4A priority patent/EP4503014A4/en
Publication of WO2023188924A1 publication Critical patent/WO2023188924A1/ja
Priority to US18/829,482 priority patent/US20240426514A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/245—Means for preventing or suppressing noise using resonance

Definitions

  • the open pipe part on one side and the open pipe part on the other side are arranged at different positions in the longitudinal direction of the sound-absorbing material, and the covering material is A sound-dampening ventilation structure is described that has a portion exposed and configures the exposed portion as at least one contact surface in contact with a space within the sound-dampening enclosure.
  • Patent Document 1 discloses that by covering a part of the porous sound-absorbing material, the sound pressure at the contact surface with the ventilation path can be increased, and the particle velocity can be increased, so the sound-absorbing effect of the porous sound-absorbing material can be improved. It is stated that it can be made higher.
  • a configuration for increasing the sound absorption effect with a small amount of porous sound-absorbing material a configuration in which a space (hereinafter referred to as back space) is provided on the opposite side of the porous sound-absorbing material from the ventilation path side (hereinafter also referred to as back side) can be considered.
  • back space a space
  • back side the opposite side of the porous sound-absorbing material from the ventilation path side
  • the present invention has the following configuration.
  • An inlet-side ventilation pipe an expanded part that communicates with the inlet-side ventilation pipe and has a larger cross-sectional area than the inlet-side ventilation pipe, and an outlet-side ventilation pipe that communicates with the expanded part and has a smaller cross-sectional area than the expanded part;
  • a ventilated silencer having a porous sound absorbing material disposed in at least a portion of the extension;
  • a back space which is a space within the expanded portion of the porous sound-absorbing material, on the opposite side of the flow path connecting the inlet-side ventilation pipe and the outlet-side ventilation pipe, and It has a partition member that partitions the back space,
  • the area partitioned by the partition member constitutes an acoustic resonance part,
  • the acoustic resonator is a ventilated silencer that is acoustically connected to the flow path.
  • the end surface of the plate-like member 34b on the opposite side from the plate-like member 34a is not in contact with the wall of the extended portion 14 (the upper wall in FIG. 3), and an opening is formed therein.
  • the opening of the acoustic resonance section 36b is narrowed by the plate member 34b compared to the example shown in FIG. In this way, by narrowing the opening of the acoustic resonance section 36b, the resonance in the acoustic resonance section 36b can be made into Helmholtz resonance.
  • the second opening structure 24 is arranged in contact with the connection part with the outlet side ventilation pipe 16 in the expansion part 14, and the opening area gradually decreases from the inlet side ventilation pipe 12 side to the outlet side ventilation pipe 16 side. It is a cylindrical member with a tapered shape.
  • the first opening structure 20d and the second opening structure 24d are configured to have regions where the wall thickness gradually becomes thinner, so that the change in cross-sectional area is gradual, and the wind Sound can be reduced.
  • the outer shape of the expanded portion 14 be kept constant and the inner side gradually widened, it may be configured that the distal end portion is made thin and pointed.
  • the first opening structure 20d and the second opening structure 24d have a region with a constant thickness over a certain length, and the thickness gradually becomes thinner toward the tip side. It may have a region, or it may be composed only of a region whose wall thickness gradually becomes thinner. Further, it is also possible to adopt a structure in which the thickness of the end portion of the opening structure having an expanding cross-sectional shape (outer shape) is gradually thinned, as in the examples shown in FIGS. 4 to 6.
  • the change in cross-sectional area due to the opening structure may be a monotonous change, a change rate may change, or a stepwise change may be made.
  • the average roughness Ra of the inner surface (the surface on the central axis side) of the opening structure is preferably 1 mm or less, more preferably 0.5 mm or less, and even more preferably 0.1 mm or less. preferable.
  • the inlet side ventilation pipe 12 and the outlet side ventilation pipe 16 are configured such that their central axes are arranged on the same straight line, but the invention is not limited to this.
  • the inlet-side ventilation pipe 12 and the outlet-side ventilation pipe 16 may have a configuration in which their central axes are not on the same straight line.
  • the back space 14a is formed on the back side of the porous sound absorbing material 30 disposed in the expanded portion 14, and the partition member 34 that partitions the back space 14a is provided in the back space 14a. It is possible to have a configuration in which
  • the two plate-like members are curved so as to bend the flow path in the direction, and the cross-sectional area changes on the tip side (inlet side ventilation pipe 12 side) of one of the plate-like members (curved structure). ).
  • the first opening structure 20e and the second opening structure 24e have a configuration in which one plate member has a wide structure in which the cross-sectional area changes, but both plate members It may also be configured to have a wide structure (curved structure) in which the cross-sectional area changes.
  • the opening structure can be configured such that the cross-sectional area gradually changes by making the two plate-like members have different radii of curvature or by changing the length.
  • One of the two spaces in the back space 14a partitioned by the partition member 34 functions as an acoustic resonance section 36.
  • the upper space functions as the acoustic resonance section 36.
  • the acoustic resonance section 36 is open on the side of the porous sound absorbing material 30 and is acoustically connected to the flow path via the porous sound absorbing material 30.
  • This acoustic resonator 36 acts, for example, as an air column resonator.
  • the partition member 34 is a flat plate-shaped member, and the acoustic resonator 36 acts as an air column resonator, but this is not limiting.
  • the partition member 34 may have a portion protruding toward the acoustic resonance portion 36b at the end thereof on the porous sound absorbing material 30 side.
  • the partition member 34 in the illustrated example has an acoustic resonant portion at the end of the largest surface of the plate member 34a on the side of the porous sound absorbing material 30, which has the same width as the plate member 34a in the direction perpendicular to the plane of the paper in FIG.
  • the porous sound absorbing material does not have punching metal on the surface opposite to the flow path. That is, it is preferable that there is no punching metal between the porous sound absorbing material and the back space and the acoustic resonance part. If a punching metal is provided between the porous sound absorbing material and the back space, there is a risk that the above-mentioned effect of improving sound deadening performance due to having the back space on the back side of the porous sound absorbing material may not be obtained.
  • the internal size of the expanded portion 114 was 105 mm in width x 37 mm in height x 140 mm in length. Further, the inner diameter of the connected vent pipes (the inlet vent pipe 112 and the outlet vent pipe 116) was 24 mm.
  • a first opening structure 120 was arranged at the connection part with the inlet side ventilation pipe 112 in the expansion part 14, and a second opening structure 124 was arranged at the connection part with the outlet side ventilation pipe 116.
  • the first opening structure 120 and the second opening structure 124 extend two-dimensionally in the width direction, have a proximal width of 24 mm, a distal width of 30 mm, and a maximum length in the longitudinal direction. It is 25mm.
  • Example 1 A ventilated silencer (see FIGS. 1 and 2) having the same structure as Comparative Example 2 was manufactured except that the partition member 34 was disposed in the back space.
  • the partition member 34 is a flat plate-shaped member with a thickness of 3 mm, a width of 50 mm, and a height of 35 mm.
  • a ventilated silencer of Example 1 was produced in the same manner as Comparative Example 1 except that it was integrally molded with the main body part and the porous sound absorbing material 130b was not disposed. There is a gap of 2 mm between the wall parts and the partition member 34.
  • Comparative Example 1 the transmission loss increases monotonically toward the high frequency side except around 315 Hz.
  • Comparative Example 2 exhibited a silencing performance much higher than Comparative Example 1 near 1500 Hz, it can be seen that there are bands where the transmission loss is lower near 1000 Hz and 2000 Hz. In particular, around 1000 Hz, the value of transmission loss in Comparative Example 1 was also hypothetically smaller than the high frequency, so the sound deadening performance was low.
  • Example 4 The structure is the same as that of the embodiment except that the partition member 34 has a portion (plate-like member 34b) that protrudes toward the acoustic resonance section 36b at the end thereof on the porous sound-absorbing material 30 side, and the acoustic resonance section 36b is a Helmholtz resonator.
  • a ventilated silencer (see FIG. 10) was produced in the same manner as in Example 3.
  • the width of the opening of the acoustic resonance section 36b (the distance between the plate member 34b and the upper wall of the expansion section 14 in FIG. 10) was 10 mm.
  • Example 5 A ventilated silencer (see FIG. 9) having the same structure as in Example 3 was manufactured except that partition members 34 were disposed in each of the two back spaces 14a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Exhaust Silencers (AREA)
PCT/JP2023/005114 2022-03-28 2023-02-15 通風型消音器 Ceased WO2023188924A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2024511389A JPWO2023188924A1 (https=) 2022-03-28 2023-02-15
CN202380024311.9A CN118843903A (zh) 2022-03-28 2023-02-15 通风型消音器
EP23776811.4A EP4503014A4 (en) 2022-03-28 2023-02-15 VENTILATION TYPE SILENCER
US18/829,482 US20240426514A1 (en) 2022-03-28 2024-09-10 Ventilation-type silencer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022051373 2022-03-28
JP2022-051373 2022-03-28

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/829,482 Continuation US20240426514A1 (en) 2022-03-28 2024-09-10 Ventilation-type silencer

Publications (1)

Publication Number Publication Date
WO2023188924A1 true WO2023188924A1 (ja) 2023-10-05

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ID=88200302

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/005114 Ceased WO2023188924A1 (ja) 2022-03-28 2023-02-15 通風型消音器

Country Status (5)

Country Link
US (1) US20240426514A1 (https=)
EP (1) EP4503014A4 (https=)
JP (1) JPWO2023188924A1 (https=)
CN (1) CN118843903A (https=)
WO (1) WO2023188924A1 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120301065B (zh) * 2025-06-13 2025-08-22 东方电气集团东方电机有限公司 风道结构、电机及风道结构设计方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63186907A (ja) * 1987-01-29 1988-08-02 Toru Morimoto マフラ−
KR20190074716A (ko) * 2017-12-20 2019-06-28 비앤알(주) 인플레이터용 소음기
JP2019132576A (ja) 2018-01-31 2019-08-08 富士フイルム株式会社 消音換気構造

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09144986A (ja) * 1995-11-27 1997-06-03 Nissan Motor Co Ltd 吸音ダクト構造体
US10928096B2 (en) * 2017-06-30 2021-02-23 Robert Bosch Llc Environmental control unit including noise reduction features
KR20190008732A (ko) * 2017-07-17 2019-01-25 주식회사 씨앤월드 산업용 멀티형 소음기
EP4113027A4 (en) * 2020-02-26 2023-08-02 FUJIFILM Corporation Muffling device and air blower system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63186907A (ja) * 1987-01-29 1988-08-02 Toru Morimoto マフラ−
KR20190074716A (ko) * 2017-12-20 2019-06-28 비앤알(주) 인플레이터용 소음기
JP2019132576A (ja) 2018-01-31 2019-08-08 富士フイルム株式会社 消音換気構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4503014A4

Also Published As

Publication number Publication date
US20240426514A1 (en) 2024-12-26
CN118843903A (zh) 2024-10-25
EP4503014A4 (en) 2025-08-13
EP4503014A1 (en) 2025-02-05
JPWO2023188924A1 (https=) 2023-10-05

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