CN203533844U - Micro perforated plate blocking and resisting compound muffler - Google Patents

Micro perforated plate blocking and resisting compound muffler Download PDF

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Publication number
CN203533844U
CN203533844U CN201320682530.XU CN201320682530U CN203533844U CN 203533844 U CN203533844 U CN 203533844U CN 201320682530 U CN201320682530 U CN 201320682530U CN 203533844 U CN203533844 U CN 203533844U
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CN
China
Prior art keywords
perforated plate
microperforated panel
sound
resonant cavity
plate
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Expired - Lifetime
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CN201320682530.XU
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Chinese (zh)
Inventor
季金良
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JIANGSU HUADONG ZHENGDA AIR CONDITIONING EQUIPMENT CO Ltd
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JIANGSU HUADONG ZHENGDA AIR CONDITIONING EQUIPMENT CO Ltd
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Priority to CN201320682530.XU priority Critical patent/CN203533844U/en
Application granted granted Critical
Publication of CN203533844U publication Critical patent/CN203533844U/en
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Abstract

A micro perforated plate blocking and resisting compound muffler comprises a peripheral plate and lateral sealing plates; throat pipes are arranged on the exterior side of the lateral sealing plates; flanges are arranged on the end surfaces of the throat pipes; sound absorption pieces are arranged in the center of the peripheral plate; ventilating chambers, lateral sound absorption chambers and lateral resonant chambers are formed in bilateral sides of the sound absorption piece. The micro perforated plate blocking and resisting compound muffler has the advantages of being reasonable in structure, obvious in noise reducing effect and wide in sound absorption frequency band, reducing environmental pollution and prolonging the service life. The micro perforated plate blocking and resisting compound muffler is applied to a ventilating system.

Description

Microperforated panel impedance composite muffler
Technical field
The utility model relates to ventilating system technical field, particularly relates to microperforated panel impedance composite muffler.
Background technology
Environment in recent years noise has become a kind of important public hazards, is one of current global important environmental pollution.The improvement of noise pollution has become the important content of home and abroad environment protection work.Domestic noise coverage is expansion trend, and traffic noise problem also becomes increasingly conspicuous, and controlling noise pollution is environmental problem urgently to be resolved hurrily in global range, so silencer has huge potentiality.Due to social development, the raising of people's living standard, therefore all air conditioner ventilating systems all adopt silencer to reduce fan noise now, has also had higher requirement to air quality.Past people are in order to reduce noise, generally all adopt dissipative muffler, but dissipative muffler is bad to Low Medium Frequency soundproof effect, and the perforated plate aperture that dissipative muffler adopts is larger, glass cloth is easily damaged by windage, likely occurs the secondary pollution of glass fibre cotton to air.If select micropunch plate muffler, this silencer is better to Low Medium Frequency soundproof effect, and service life is also long, can not occur secondary pollution to air.But micropunch plate muffler is bad again to medium-high frequency soundproof effect, in order to overcome the shortcoming of above two types of silencers, need to develop a kind of microperforated panel impedance composite muffler.
Summary of the invention
The purpose of this utility model is to provide a kind of rational in infrastructure, and noise-reducing effect is remarkable, and acoustic frequency bandwidth reduces environmental pollution, the microperforated panel impedance composite muffler increasing the service life.
The utility model is achieved in that microperforated panel impedance composite muffler, comprise peripheral board, side seal board, side seal board arranged outside has trunnion, trunnion end face to be provided with flange, it is characterized in that: described peripheral board center is provided with acoustical plate, acoustical plate both sides are disposed with respectively vented cavity, the side draught operatic tunes, side resonant cavity.
Acoustical plate described in the utility model is comprised of two sound absorption chambeies and a resonant cavity; Resonant cavity is arranged between two sound absorption chambeies; Described sound absorption chamber is comprised of microperforated panel, glass cloth, sound-absorption glass cotton, perforated plate; Acoustical plate is provided with perforated plate in resonant cavity side, in vented cavity side, is provided with microperforated panel, and microperforated panel inner side is provided with glass cloth, is provided with sound-absorption glass cotton between glass cloth and perforated plate; In described resonant cavity, be provided with several keel A for supporting; Acoustical plate two ends are provided with wind deflector.
The side draught operatic tunes described in the utility model is comprised of microperforated panel, glass cloth, sound-absorption glass cotton, perforated plate; In side resonant cavity side, be provided with perforated plate, in vented cavity side, be provided with microperforated panel, microperforated panel inner side is provided with glass cloth, is provided with sound-absorption glass cotton between glass cloth and perforated plate.
Microperforated panel described in the utility model is staggered, and aperture is: ф 0.8 ~ 1mm, and order number is: 12 ~ 19 orders; Described perforated plate is staggered, and aperture is: ф 4.8 ~ 5.2mm, order number is: 9 ~ 12 orders.
The utility model is rational in infrastructure, and noise-reducing effect is remarkable, and acoustic frequency bandwidth has reduced environmental pollution, has extended service life.
Accompanying drawing explanation:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A portion enlarged drawing in Fig. 1;
Fig. 3 is B portion enlarged drawing in Fig. 1;
In figure 1, peripheral board, 2, side seal board, 3, microperforated panel, 4, glass cloth, 5, keel A, 6, sound-absorption glass is cotton, 7, side resonant cavity, 8, the side draught operatic tunes, 9, vented cavity, 10, acoustical plate, 10-1, sound absorption chamber, 10-2, resonant cavity, 11, wind deflector, 12, trunnion, 13, flange, 14, keel B, 15, perforated plate.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
With reference to accompanying drawing, microperforated panel impedance composite muffler, comprise peripheral board 1, side seal board 2, side seal board 2 arranged outside have trunnion 12, trunnion 12 end faces to be provided with flange 13, it is characterized in that: described peripheral board 1 center is provided with acoustical plate 10, and acoustical plate 10 both sides are disposed with respectively vented cavity 9, the side draught operatic tunes 8, side resonant cavity 7.Described acoustical plate 10 is comprised of two sound absorption chamber 10-1 and a resonant cavity 10-2; Resonant cavity 10-2 is arranged between two sound absorption chamber 10-1; Described sound absorption chamber 10-1 is comprised of microperforated panel 3, glass cloth 4, sound-absorption glass cotton 6, perforated plate 15; Acoustical plate 10 is provided with perforated plate 15 in resonant cavity 10-2 side, in vented cavity 9 sides, is provided with microperforated panel 3, and microperforated panel 3 inner sides are provided with glass cloth 4, between glass cloth 4 and perforated plate 15, is provided with sound-absorption glass cotton 6; In described resonant cavity 10-2, be provided with several keel A5 for supporting; Acoustical plate 10 two ends are provided with wind deflector 11.The described side draught operatic tunes 8 is comprised of microperforated panel 3, glass cloth 4, sound-absorption glass cotton 6, perforated plate 15; In side resonant cavity 7 sides, be provided with perforated plate 15, in vented cavity 9 sides, be provided with microperforated panel 3, microperforated panel 3 inner sides are provided with glass cloth 4, between glass cloth 4 and perforated plate 15, are provided with sound-absorption glass cotton 6.
Described microperforated panel 3 is staggered, and aperture is: ф 0.8 ~ 1mm, and order number is: 12 ~ 19 orders; Described perforated plate 15 is staggered, and aperture is: ф 4.8 ~ 5.2mm, order number is: 9 ~ 12 orders.During concrete enforcement, the utility model acoustical plate is a sound absorption chamber by a slice acoustical plate in past, sound absorption chamber thickness 200mm, and changing a slice acoustical plate into is to have a resonant cavity in the middle of two sound absorption chambeies, sound absorption chamber thickness 70mm, resonant cavity thickness is 60mm; It is that 100mm and a resonant cavity thickness are 100mm that side draught operatic tunes thickness changes a sound absorption chamber thickness into from 200mm.The utility model acoustic frequency bandwidth, has good soundproof effect to basic, normal, high frequency, can not occur secondary pollution to air.In operation, when the outflow of air from the plenum chamber 9, respectively, into the source chamber 8 and the inner side of absorbing sound absorptive sheet 10 microperforated plate, friction and impact absorbing glass wool 6, siphoning off the part of the sound energy, continue respectively 7 into the side of the cavity resonator and the sound absorbing sheet 10-2, the sound source through the resonant cavity resonance and then enters the secondary side of the sound absorbing chamber 8, respectively, and the sound absorbing sheet and the sound absorbing chamber 10-1 absorbing glass cotton secondary collision, finally came out into the plenum chamber 8 from the side of the sound-absorbing chamber piece sound absorption and sound absorption chamber 10-1 3 9 micro-perforated plate was taken away by the air flow, which played a secondary silencing effect, so that micro-perforated plate muffler complex impedance can not afford to dust? long life, no secondary pollution, noise reduction, volume, sound absorption frequency bandwidth, low, medium and high frequency have a better silencing effect than ordinary micro-perforated plate muffler noise can be more about a-level 5d <b TranNum="70"> B </ b>, so that the product is suitable for underground railway, highway tunnel ventilation ductwork used.

Claims (4)

1. microperforated panel impedance composite muffler, comprise peripheral board (1), side seal board (2), side seal board (2) arranged outside has trunnion (12), trunnion (12) end face to be provided with flange (13), it is characterized in that: described peripheral board (1) center is provided with acoustical plate (10), acoustical plate (10) both sides are disposed with respectively vented cavity (9), the side draught operatic tunes (8), side resonant cavity (7).
2. microperforated panel impedance composite muffler according to claim 1, is characterized in that: described acoustical plate (10) is comprised of two sound absorption chambeies (10-1) and a resonant cavity (10-2); Resonant cavity (10-2) is arranged between two sound absorption chambeies (10-1); Described sound absorption chamber (10-1) is comprised of microperforated panel (3), glass cloth (4), sound-absorption glass cotton (6), perforated plate (15); Acoustical plate (10) is provided with perforated plate (15) in resonant cavity (10-2) side, in vented cavity (9) side, be provided with microperforated panel (3), microperforated panel (3) inner side is provided with glass cloth (4), between glass cloth (4) and perforated plate (15), is provided with sound-absorption glass cotton (6); In described resonant cavity (10-2), be provided with several keel A(5 for supporting); Acoustical plate (10) two ends are provided with wind deflector (11).
3. microperforated panel impedance composite muffler according to claim 1 and 2, is characterized in that: the described side draught operatic tunes (8) is comprised of microperforated panel (3), glass cloth (4), sound-absorption glass cotton (6), perforated plate (15); In side resonant cavity (7) side, be provided with perforated plate (15), in vented cavity (9) side, be provided with microperforated panel (3), microperforated panel (3) inner side is provided with glass cloth (4), between glass cloth (4) and perforated plate (15), is provided with sound-absorption glass cotton (6).
4. microperforated panel impedance composite muffler according to claim 2, is characterized in that: described microperforated panel (3) is staggered, and aperture is: ф 0.8 ~ 1mm, and order number is: 12 ~ 19 orders; Described perforated plate (15) is staggered, and aperture is: ф 4.8 ~ 5.2mm, order number is: 9 ~ 12 orders.
CN201320682530.XU 2013-11-01 2013-11-01 Micro perforated plate blocking and resisting compound muffler Expired - Lifetime CN203533844U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320682530.XU CN203533844U (en) 2013-11-01 2013-11-01 Micro perforated plate blocking and resisting compound muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320682530.XU CN203533844U (en) 2013-11-01 2013-11-01 Micro perforated plate blocking and resisting compound muffler

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CN203533844U true CN203533844U (en) 2014-04-09

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106057188A (en) * 2016-07-28 2016-10-26 上海坦泽环保科技有限公司 Micro U-shaped muffler
CN107452366A (en) * 2016-06-01 2017-12-08 四川五环石化装备有限公司 High pressure gas discharge denoising device
CN111336558A (en) * 2020-03-05 2020-06-26 宁波方太厨具有限公司 Air outlet hood, range hood applying air outlet hood and control method of range hood
CN111927781A (en) * 2020-07-17 2020-11-13 北方华锦化学工业股份有限公司 Low-frequency and medium-frequency noise elimination for Roots blower
US11254087B2 (en) 2017-04-26 2022-02-22 Corning Incorporated Micro-perforated glass laminates and methods of making the same
US11608291B2 (en) 2016-11-04 2023-03-21 Corning Incorporated Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107452366A (en) * 2016-06-01 2017-12-08 四川五环石化装备有限公司 High pressure gas discharge denoising device
CN106057188A (en) * 2016-07-28 2016-10-26 上海坦泽环保科技有限公司 Micro U-shaped muffler
US11608291B2 (en) 2016-11-04 2023-03-21 Corning Incorporated Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems
US11254087B2 (en) 2017-04-26 2022-02-22 Corning Incorporated Micro-perforated glass laminates and methods of making the same
CN111336558A (en) * 2020-03-05 2020-06-26 宁波方太厨具有限公司 Air outlet hood, range hood applying air outlet hood and control method of range hood
CN111927781A (en) * 2020-07-17 2020-11-13 北方华锦化学工业股份有限公司 Low-frequency and medium-frequency noise elimination for Roots blower

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Granted publication date: 20140409