CN205876823U - Compound ventilation blower silencer of wide band - Google Patents
Compound ventilation blower silencer of wide band Download PDFInfo
- Publication number
- CN205876823U CN205876823U CN201620863039.0U CN201620863039U CN205876823U CN 205876823 U CN205876823 U CN 205876823U CN 201620863039 U CN201620863039 U CN 201620863039U CN 205876823 U CN205876823 U CN 205876823U
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- perforated plate
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- microperforated panel
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Abstract
The utility model discloses a compound ventilation blower silencer of wide band, including installing the organism and setting up perforated plate and the micropunch noise elimination subassembly in the installation organism respectively, perforation noise elimination subassembly includes that the one -level wears a little that perforated plate structure is worn a little to perforated plate structure, second grade and perforated plate structure is worn a little to the third grade, the tertiary end of giving vent to anger of wearing perforated plate structure and perforated plate a little links to each other, and the second grade is worn perforated plate structure a little and is located that perforated plate structure is worn a little to the one -level and the third grade is worn between the perforated plate structure a little. The silencer can absorb the regional noise of a plurality of frequencies of fan, reaches the effect of absorbing broadband noise, wears perforated plate structure a little and the compound silencer design of wearing perforated plate structure through the third grade, can reduce fan 8dB (A) 10dB's (A) noise, this compound silencer can obtain a series of silencers through changing micropunch progression, punching rate, aperture and multiple punching material isoparametric, can the wide application on the fan of the civilian special environment of having relatively high expectations to the noise.
Description
Technical field
This utility model belongs to centrifugal fan acoustic filter technical field, relates to a kind of wideband composite ventilated machine acoustic filter.
Background technology
The most conventional acoustic filter, mainly according to fan noise spectral characteristic, selects a kind of sound absorption structure, drops targetedly
Low certain band noise maximum to fan noise contribution.But some noise requirements is higher, and to each frequency field
There is the special blower fan of concrete noise figure requirement, not only need acoustic filter to reduce the band noise maximum to fan noise contribution, with
Time also need to reduce the noise of other frequency fields.Therefore conventional acoustic filter can not meet requirement, the most how to develop one
The composite muffler of wideband, is current problem demanding prompt solution.
Utility model content
For solving the problems referred to above, this utility model provides a kind of wideband composite ventilated machine acoustic filter.Thus effectively solve
Current acoustic filter of having determined can only solve the problem of single frequency range, is particularly well-suited to the field needing to absorb different frequency noise region
Close.
This utility model is achieved by following technical solution.
A kind of wideband composite ventilated machine acoustic filter, including install body and be separately positioned on the perforated plate installed in body and
Micropunch sound attenuation assembly, described perforation sound attenuation assembly includes that one-level microperforated panel structure, two grades of microperforated panel structures and three grades are micro-
Perforated plate structure, described three grades of microperforated panel structures are connected with the outlet side of perforated plate, and two grades of microperforated panel structures are positioned at one-level
Between microperforated panel structure and three grades of microperforated panel structures.
Described fitting machine body is positioned at outside perforated plate and is provided with absorbent treatment.
Described absorbent treatment uses sound-absorbing porous material composition.
Described sound-absorbing porous material is melamine foamed plastic.
Described perforated plate is formed fan-shaped tubular structure by outer annular surface and internal spherical surface, and at outer annular surface and internal spherical surface
On be provided with projection.
Described one-level microperforated panel structure, two grades of microperforated panel structures and three grades of microperforated panel structures are by some micropunch
Plate surrounds box-structure, wherein bores a hole face for one-level on the right side of one-level microperforated panel structure underside and two grades of microperforated panel structures, and two
Level microperforated panel structure upper end is two grades of perforation faces, and three grades of microperforated panel structure underside and right side are three grades of perforation faces.
The beneficial effects of the utility model are:
Compared with prior art, acoustic filter described in the utility model can absorb blower fan multiple frequency field noise, reaches to inhale
Receive the effect of broadband noise, designed by the composite muffler of three grades of microperforated panel structures and perforated plate structure, blower fan can be reduced
8dB (A)～the noise of 10dB (A)；This composite muffler by changing micropunch progression, punching rate, aperture and can be worn more
The parameters such as Porous materials, obtain a series of acoustic filter, can be widely applied to the blower fan of civilian special environment higher to noise requirements
On, it is also possible to being applied to other needs noise reduction field.
Accompanying drawing explanation
Fig. 1 is internal structure schematic diagram of the present utility model；
Fig. 2 is the structural representation of this utility model middle punch plate；
Fig. 3 is the A structure for amplifying schematic diagram of Fig. 2；
Fig. 4 is micropunch sound attenuation assembly structural representation in this utility model；
Fig. 5 is perforated microstructure schematic diagram in this utility model；
Fig. 6 is enlarged diagram at the B of Fig. 5.
In figure: 1-installs body, 2-perforated plate, 3-absorbent treatment, 4-one-level microperforated panel structure, and bis-grades of micropunch of 5-are hardened
Structure, tri-grades of microperforated panel structures of 6-, 21-outer annular surface, 22-internal spherical surface, 41-one-level perforation face, 51-bis-grades bores a hole face, 61-
Three grades of perforation faces, 211-is protruding.
Detailed description of the invention
Further describe the technical solution of the utility model below in conjunction with embodiment accompanying drawing, but claimed scope is not
It is confined to described.
As shown in Figures 1 to 6, a kind of wideband composite ventilated machine acoustic filter described in the utility model, including installing body 1
And it being separately positioned on the perforated plate 2 and micropunch sound attenuation assembly installed in body 1, described perforation sound attenuation assembly includes that one-level is micro-and wears
4, two grades of microperforated panel structures 5 of AND DEWATERING FOR ORIFICE STRUCTURE and three grades of microperforated panel structures 6, described three grades of microperforated panel structures 6 and perforated plate 2
Outlet side be connected, two grades of microperforated panel structures 5 are between one-level microperforated panel structure 4 and three grades of microperforated panel structures 6.Adopt
By the technical program, in use, being arranged at fans entrance by this acoustic filter, air-flow is made up of 3 grades of microperforated panel structures
Puncherless muffler assembly enters blower fan, and the high-frequency noise diffused out at fans entrance finishes structure through 3 grades of micropunch, by
Micropunch and cavity form countless resonators, when a certain frequency acoustic energy load is equal with resonator natural frequency, in panel hole
Air move back and forth with the beat of this frequency, and absorb energy from incident sound, reach acoustically effective.Majority of high frequency is made an uproar
Sound and part mid-frequency noise will be able to be absorbed, and remaining a small amount of mid-frequency noise and low-frequency noise reflect away.Perforated microstructure such as Fig. 5
Shown in, the frequency selecting to determine to need absorption of noise of orifice plate thickness δ, cavity thickness δ 1, aperture d and punching rate.Micro-by 3 grades
The aperture of perforated plate, thickness of slab and punching rate design and distribution, can absorb blower fan multiple frequency field noise, reaches to absorb wideband and makes an uproar
The effect of sound.Designed by the composite muffler of 3 grades of microperforated panel structures and perforated plate structure, can reduce blower fan 8dB (A)～
The noise of 10dB (A).
Described installation body 1 is positioned at outside perforated plate 2 and is provided with absorbent treatment 3.Its noise-cancelling theory is, air-flow initially enters to be worn
Orifice plate 2, a part of low-frequency noise acoustic energy is by being predominantly absorbed after perforated plate 2, and another part is changed one's profession absorption by absorbent treatment 3.
Described absorbent treatment 3 uses sound-absorbing porous material to form, and air-flow enters perforated plate 2 rear portion low-frequency noise acoustic energy and leads to
Being predominantly absorbed after crossing perforated plate 2, another part produces friction by sound-absorbing porous material and is converted into heat energy.Perforated plate structure such as figure
2, shown in Fig. 3, the selection of the how empty sound-absorbing materials after the punching rate of perforated plate 2 and aperture d and cavity needs according to being absorbed
Noise frequency determines.Air-flow can absorb major part low-frequency noise and part mid-frequency noise after perforated plate 2.
Described sound-absorbing porous material is melamine foamed plastic.Melamine foamed plastic is made up of three-dimensional netted open-celled structure, opens
Porosity is up to 99.9%, and sound wave can conveniently and effectively enter the deep layer of foam, is changed into the vibrations of grid and is consumed and inhales
Receive, can effectively eliminate echo simultaneously.Melamine foamed plastic has superior sound absorbing capabilities in wider audio range, special
It not that there is in the absorption of low frequency noise prominent effect.
Described perforated plate 2 is formed fan-shaped tubular structure by outer annular surface 21 and internal spherical surface 22, and outer annular surface 21 He
Protruding 211 it are provided with on internal spherical surface 22.By protruding 211, perforated plate 2 is fixed in sound-absorbing porous material.
4, two grades of microperforated panel structures 5 of described one-level microperforated panel structure and three grades of microperforated panel structures 6 are by some micro-
Perforated plate surrounds box-structure, wherein bores a hole for one-level on the downside of one-level microperforated panel structure 4 and on the right side of two grades of microperforated panel structures 5
Face 41, two grades of microperforated panel structure 5 upper ends are two grades of perforation faces 51, and on the downside of three grades of microperforated panel structures 6 and right side is three grades and wears
Face, hole 61.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, described perforated plate 2 all becomes equilateral triangle to arrange with the perforation on microperforated panel.
The punching rate of perforated plate 2 and aperture d select to need to determine according to by absorption of noise frequency；Micropunch orifice plate thickness δ, cavity thickness δ
1, aperture d and the frequency selecting to determine to need absorption of noise of punching rate.
Claims (6)
1. a wideband composite ventilated machine acoustic filter, it is characterised in that: include body (1) being installed and being separately positioned on installation body
(1) perforated plate (2) in and micropunch sound attenuation assembly, described perforation sound attenuation assembly include one-level microperforated panel structure (4), two grades
Microperforated panel structure (5) and three grades of microperforated panel structures (6), described three grades of microperforated panel structures (6) are given vent to anger with perforated plate (2)
End is connected, and two grades of microperforated panel structures (5) are positioned between one-level microperforated panel structure (4) and three grades of microperforated panel structures (6).
A kind of wideband composite ventilated machine acoustic filter the most according to claim 1, it is characterised in that: described installation body (1)
It is positioned at perforated plate (2) outside and is provided with absorbent treatment (3).
A kind of wideband composite ventilated machine acoustic filter the most according to claim 2, it is characterised in that: described absorbent treatment (3) is adopted
Form with sound-absorbing porous material.
A kind of wideband composite ventilated machine acoustic filter the most according to claim 3, it is characterised in that: described sound-absorbing porous material
For melamine foamed plastic.
A kind of wideband composite ventilated machine acoustic filter the most according to claim 1, it is characterised in that: described perforated plate (2) by
Outer annular surface (21) and the fan-shaped tubular structure of internal spherical surface (22) composition, and set in outer annular surface (21) and internal spherical surface (22)
It is equipped with projection (211).
A kind of wideband composite ventilated machine acoustic filter the most according to claim 1, it is characterised in that: described one-level microperforated panel
Structure (4), two grades of microperforated panel structures (5) and three grades of microperforated panel structures (6) are surrounded box-structure by some microperforated panels,
Wherein bore a hole face (41) for one-level in one-level microperforated panel structure (4) downside and two grades of microperforated panel structures (5) right side, and two grades micro-wears
AND DEWATERING FOR ORIFICE STRUCTURE (5) upper end is two grades of perforation faces (51), and three grades of microperforated panel structure (6) downsides and right side are three grades of perforation faces
(61)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620863039.0U CN205876823U (en) | 2016-08-11 | 2016-08-11 | Compound ventilation blower silencer of wide band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620863039.0U CN205876823U (en) | 2016-08-11 | 2016-08-11 | Compound ventilation blower silencer of wide band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205876823U true CN205876823U (en) | 2017-01-11 |
Family
ID=57704112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620863039.0U Active CN205876823U (en) | 2016-08-11 | 2016-08-11 | Compound ventilation blower silencer of wide band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205876823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505808A (en) * | 2018-12-25 | 2019-03-22 | 广东美的白色家电技术创新中心有限公司 | Fans silencer and fan noise elimination system |
-
2016
- 2016-08-11 CN CN201620863039.0U patent/CN205876823U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505808A (en) * | 2018-12-25 | 2019-03-22 | 广东美的白色家电技术创新中心有限公司 | Fans silencer and fan noise elimination system |
| CN109505808B (en) * | 2018-12-25 | 2024-02-20 | 广东美的白色家电技术创新中心有限公司 | Fan silencer and fan silencing system |
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