CN2197622Y - Combined silencer with punctured board - Google Patents
Combined silencer with punctured board Download PDFInfo
- Publication number
- CN2197622Y CN2197622Y CN 94215722 CN94215722U CN2197622Y CN 2197622 Y CN2197622 Y CN 2197622Y CN 94215722 CN94215722 CN 94215722 CN 94215722 U CN94215722 U CN 94215722U CN 2197622 Y CN2197622 Y CN 2197622Y
- Authority
- CN
- China
- Prior art keywords
- utility
- model
- board
- plate
- 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.)
- Expired - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The utility model relates to a combined silencer with a micro-hole board. The utility model is characterized in that an extra-fine glass-wool felt sound-absorbing board is arranged along the inside of the casing board; a glass wool cloth is arranged on the extra-fine glass-wool felt sounding-absorbing board; the perforated board whose hole diameter is phi 6 mm is arranged on the glass wool cloth; a tiny perforated board whose hole diameter is phi 2 mm is arranged on an interval hollow chamber; a Z-shaped sectional reinforcing rib and a U-shaped sectional reinforcing rib can make the two-stories perforated board fixedly connected with the casing board; the inner part of the hollow chamber of the middle of the silencer is provided with a sound absorbing sheet with wedge in array way. The utility model has reasonable structure; the utility model is firm and durable; the utility model can simultaneously eliminate the high, middle and low frequency noises; the outer part of the silencer doesn't need to make the heat-insulating layer, so that the utility model has low cost. The utility model is suitable for reducing the noise produced by the ventilating air conditioning system.
Description
The utility model belongs in ventilation, the air-conditioning system, is used to prevent or suppress the parts of noise, the board-like composite muffler of particularly a kind of micro hole.
Fan noise in building ventilation, the air-conditioning system needs to adopt silencer to be decayed.Normal adopt dissipative muffler, reactive muffler arranged because the low frequency acoustic attenuation performance of dissipative muffler is relatively poor, the high frequency acoustic attenuation performance of reactive muffler is not good, and complex muffler is arranged.Be with resistive and reactive muffling principle Combination Design in a silencer, the acoustic characteristics that can have the broad frequency.Its concrete pattern such as micropunch plate muffler just have anechoic frequency bandwidth, and resistance is little, do not need sound-absorbing porous material, and be moisture resistance, heatproof, and gasproof stream such as washes away at characteristics.The architectural feature of micropunch plate muffler is: micro-pore diameter φ=0.2～1.0mm, and low punching rate 0.5～3.0%, cavity depth 50～200mm can be provided with double-deck microperforated panel, to absorb the different noises of low frequency, intermediate frequency or high frequency.At present, in the existing micropunch plate muffler, because micropore is very little, handicapping material not again, the noise elimination effect of centering, high frequency is relatively poor, generally can only eliminate 10～15 decibels, can not satisfy the requirement of the basic, normal, high audio-frequency noise of elimination simultaneously.
The purpose of this utility model is, improves the aperture and the punching rate of design perforated plate, adds resistive material, so that accomplish simultaneously the inhibition of basic, normal, high audio-frequency noise improved the noise elimination effect.
Small orifice plate composite muffler of the present utility model, form by Shell Plate, ribs, perforated plate, it is characterized in that, one deck extra-fine glass-wool felt acoustic board is set along the Shell Plate inboard, apply one deck glass wool cloth, the perforated plate of one deck aperture φ 6mm is set, and a cavity is established the small perforated plate of one deck aperture φ 2mm, punching rate 〉=5% more at interval; Ribs and pulling rivet with Z type and U type section are connected and fixed two-layer perforated plate and Shell Plate; In the middle cavities of silencer, arrange the acoustical plate that the band wedge is set, the acoustical plate of band wedge is filled out the extra-fine glass-wool felt that accompanies the glass wool cloth parcel therebetween and is formed by the perforated plate of two-layer aperture φ 3～6mm; Be provided with adapter and flange at the silencer two ends.
Small orifice plate composite muffler of the present utility model has advantage and is, and is rational in infrastructure, sturdy and durable; Eliminate the effective of high, medium and low audio-frequency noise simultaneously, can eliminate more than 25 decibels (A); Be provided with extra-fine glass-wool felt and eliminate the noise, be incubated, heat-insulation layer needn't be made in the silencer outside, can reduce cost.Be applicable to the aerodynamic noise that reduces blower fan in ground and hypogee ventilation, air-conditioning, the cleaning system.
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is small orifice plate composite muffler structural map
Fig. 2 is I-I profile of Fig. 1
As seen from the figure, small orifice plate composite muffler of the present utility model, form by Shell Plate, ribs, perforated plate, it is characterized in that, along Shell Plate 1 inboard one deck extra-fine glass-wool felt acoustic board 2 is set, applies one deck glass wool cloth 3, the perforated plate 4 of one deck aperture φ 6mm is set, a cavity is established the small perforated plate 6 of one deck aperture φ 2mm, punching rate 〉=5% more at interval; Ribs 5 and pulling rivet with Z type and U type section are connected and fixed two-layer perforated plate and Shell Plate; In the middle cavities of silencer, arrange the acoustical plate 9 that the band wedge is set, the acoustical plate of band wedge is filled out the extra-fine glass-wool felt that accompanies the glass wool cloth parcel therebetween and is formed by the perforated plate of two-layer aperture φ 3～6mm; Be provided with adapter 7 and flange 8 at the silencer two ends.
Claims (1)
1, a kind of small orifice plate composite muffler, form by Shell Plate, ribs, perforated plate, it is characterized in that, one deck extra-fine glass-wool felt acoustic board is set along the Shell Plate inboard, apply one deck glass wool cloth, the perforated plate of one deck aperture φ 6mm is set, and a cavity is established the small perforated plate of one deck aperture φ 2mm, punching rate 〉=5% more at interval; Ribs and pulling rivet with Z type and U type section are connected and fixed two-layer perforated plate and Shell Plate; In the middle cavities of silencer, arrange the acoustical plate that the band wedge is set, the acoustical plate of band wedge is filled out the extra-fine glass-wool felt that accompanies the glass wool cloth parcel therebetween and is formed by the perforated plate of two-layer aperture φ 3～6mm; Be provided with adapter and flange at the silencer two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94215722 CN2197622Y (en) | 1994-06-27 | 1994-06-27 | Combined silencer with punctured board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94215722 CN2197622Y (en) | 1994-06-27 | 1994-06-27 | Combined silencer with punctured board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2197622Y true CN2197622Y (en) | 1995-05-17 |
Family
ID=33831624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94215722 Expired - Fee Related CN2197622Y (en) | 1994-06-27 | 1994-06-27 | Combined silencer with punctured board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2197622Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645011A (en) * | 2012-04-17 | 2012-08-22 | 广州铭铉净化设备科技有限公司 | Sinusoidal micropore plate muffler of air conditioning system |
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| 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 |
-
1994
- 1994-06-27 CN CN 94215722 patent/CN2197622Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645011A (en) * | 2012-04-17 | 2012-08-22 | 广州铭铉净化设备科技有限公司 | Sinusoidal micropore plate muffler of air conditioning system |
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN103383140B (en) * | 2012-05-04 | 2016-04-06 | 美的集团股份有限公司 | Indoor air conditioner cabinet denoising structure, indoor air conditioner cabinet and air-conditioner |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |