CN202758608U - Sound-absorbing body of composite resonant cavity - Google Patents
Sound-absorbing body of composite resonant cavity Download PDFInfo
- Publication number
- CN202758608U CN202758608U CN 201220390460 CN201220390460U CN202758608U CN 202758608 U CN202758608 U CN 202758608U CN 201220390460 CN201220390460 CN 201220390460 CN 201220390460 U CN201220390460 U CN 201220390460U CN 202758608 U CN202758608 U CN 202758608U
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- sound
- resonant cavity
- absorbing
- orifice plate
- hole plate
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Abstract
The utility model provides a sound-absorbing body of a composite resonant cavity. The sound-absorbing body of the composite resonant cavity is characterized in that the sound-absorbing body of the composite resonant cavity comprises an outer side hole plate and an inner side hole plate; the inner side of the inner side hole plate is fixed; a melamine foam sound-absorbing cotton is arranged between the outer side hole plate and the inner side hole plate; a gaps is arranged between the outer side hole plate and the melamine foam sound-absorbing cotton, and a gaps is arranged between the inner side hole plate and the melamine foam sound-absorbing cotton, so as to form an outer side resonant cavity and an inner side resonant cavity; the hole diameter of a circular hole on the outer side hole plate is greater than the hole diameter of a circular hole on the inner side hole plate. The sound-absorbing body and an installation node are processed into a whole structure. According to the utility model, the sound-absorbing body of the composite resonant cavity has the advantages of simple structure, practical function and convenient installation; the resonant cavities cooperate with the sound-absorbing material, thus the disadvantage of low sound-absorbing coefficient of a resistive sound-absorbing structure in low frequency is effectively made up, and the sound-absorbing coefficient is high in the whole frequency band range.
Description
Technical field
The utility model relates to a kind of sound absorber of combinative resonator.
Background technology
Traditional sound absorber adopts the damping materials such as rock wool, glass silk flosssilk wadding to make more at present, is provided with resonant cavity, and resistive sound absorption structure is on the low side at the low frequency absorption coefficient, and result of use is undesirable.
The utility model content
The utility model provides a kind of sound absorber of combinative resonator, and acoustically effective is better.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of sound absorber of combinative resonator, comprise outside orifice plate and inboard orifice plate, inboard orifice plate is inboard fixing, between apertura lateralis plate and inboard orifice plate, the melamine foamed plastic acoustical cotton is set, between outside orifice plate and the melamine foamed plastic acoustical cotton, the gap is set respectively between inboard orifice plate and the melamine foamed plastic acoustical cotton forms outside resonant cavity and interior survey resonant cavity.
Circular hole aperture on the orifice plate of the outside is greater than the circular hole aperture on the inboard orifice plate.
Sound absorber is processed into integrative-structure with the installation node.
The utility model is simple in structure, practical function, and is easy for installation, utilizes resonant cavity to cooperate acoustic absorbant, effectively remedied resistive sound absorption structure in low frequency absorption coefficient weakness on the low side, and higher acoustical absorption coefficient is arranged in whole frequency band range.The melamine foamed plastic acoustical cotton is fire-retardant, acoustically effective good.Between medial and lateral orifice plate and the melamine foamed plastic acoustical cotton resonant cavity is set, the circular hole aperture on the orifice plate of the outside is more conducive to sound absorption greater than the circular hole aperture on the inboard orifice plate.
Description of drawings
Fig. 1 is front view of the present utility model;
Fig. 2 is vertical view of the present utility model.
Embodiment
Embodiment: as shown in Figure 1, a kind of sound absorber of combinative resonator, comprise outside orifice plate 1 and inboard orifice plate 2, inboard orifice plate 2 inboard fixing, between apertura lateralis plate 1 and inboard orifice plate 2, melamine foamed plastic acoustical cotton 3 is set, between outside orifice plate 1 and the melamine foamed plastic acoustical cotton 3, the gap is set respectively between inboard orifice plate 2 and the melamine foamed plastic acoustical cotton 3 forms outside resonant cavity 4 and interior survey resonant cavity 5.Circular hole aperture on the orifice plate 1 of the outside is greater than the circular hole aperture on the inboard orifice plate 2.Sound absorber is processed into integrative-structure with the installation node.When increasing gradually the percentage of perforation from 2% to 15%, the surface area that the hole accounts for increases, and air molecule enters the probability increase that resonant cavity participates in resonance, and acoustical absorptivity increases.
The utility model utilizes resonating cativty to cooperate acoustic absorbant, has effectively remedied resistive sound absorption structure in low frequency absorption coefficient weakness on the low side, and higher acoustical absorption coefficient is arranged in whole frequency band range.In order to make things convenient for the sound absorber Fast Installation, in manufacturing process, will node be installed and sound absorber is processed into one, on-the-spotly directly be connected with erection bolt, can constructability, the reduction of erection time.
Claims (3)
1. the sound absorber of a combinative resonator, it is characterized in that: comprise outside orifice plate and inboard orifice plate, inboard orifice plate is inboard fixing, between apertura lateralis plate and inboard orifice plate, the melamine foamed plastic acoustical cotton is set, between outside orifice plate and the melamine foamed plastic acoustical cotton, the gap is set respectively between inboard orifice plate and the melamine foamed plastic acoustical cotton forms outside resonant cavity and interior survey resonant cavity.
2. the sound absorber of combinative resonator according to claim 1, it is characterized in that: the circular hole aperture on the orifice plate of the outside is greater than the circular hole aperture on the inboard orifice plate.
3. the sound absorber of combinative resonator according to claim 2 is characterized in that: sound absorber with node be installed be processed into integrative-structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220390460 CN202758608U (en) | 2012-08-08 | 2012-08-08 | Sound-absorbing body of composite resonant cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220390460 CN202758608U (en) | 2012-08-08 | 2012-08-08 | Sound-absorbing body of composite resonant cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202758608U true CN202758608U (en) | 2013-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220390460 Expired - Fee Related CN202758608U (en) | 2012-08-08 | 2012-08-08 | Sound-absorbing body of composite resonant cavity |
Country Status (1)
| Country | Link |
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| CN (1) | CN202758608U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531142A (en) * | 2016-10-20 | 2017-03-22 | 中国电力科学研究院 | Noise-reducing device for transformer substation |
| CN108194318A (en) * | 2017-12-22 | 2018-06-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Resonant silencing structure and with its compressor |
| CN111477440A (en) * | 2020-04-08 | 2020-07-31 | 国网河北省电力有限公司沧州供电分公司 | High-efficient compound sound insulation board |
| CN112542152A (en) * | 2020-11-26 | 2021-03-23 | 江苏大学 | Multilayer composite sound absorption structure with compact sound absorption material in middle layer |
-
2012
- 2012-08-08 CN CN 201220390460 patent/CN202758608U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531142A (en) * | 2016-10-20 | 2017-03-22 | 中国电力科学研究院 | Noise-reducing device for transformer substation |
| CN108194318A (en) * | 2017-12-22 | 2018-06-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Resonant silencing structure and with its compressor |
| CN108194318B (en) * | 2017-12-22 | 2023-11-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Resonance silencing structure and compressor with same |
| CN111477440A (en) * | 2020-04-08 | 2020-07-31 | 国网河北省电力有限公司沧州供电分公司 | High-efficient compound sound insulation board |
| CN112542152A (en) * | 2020-11-26 | 2021-03-23 | 江苏大学 | Multilayer composite sound absorption structure with compact sound absorption material in middle layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HENAN YUANGUANG SCIENCE + TECHNOLOGY CO., LTD. Free format text: FORMER NAME: PUYANG YUANGUANG TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 457000 hi tech Zone, hi tech Zone, Henan, Puyang Patentee after: HENAN YUANGUANG SCIENCE & TECHNOLOGY CO., LTD. Address before: 457001 No. 109 Zhongyuan Road, Henan, Puyang Patentee before: Puyang Yuanguang Technology Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20190808 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |