CN206489873U - A kind of ventilation and heat sound insulating structure of broad band low frequency - Google Patents
A kind of ventilation and heat sound insulating structure of broad band low frequency Download PDFInfo
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- CN206489873U CN206489873U CN201720112678.8U CN201720112678U CN206489873U CN 206489873 U CN206489873 U CN 206489873U CN 201720112678 U CN201720112678 U CN 201720112678U CN 206489873 U CN206489873 U CN 206489873U
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Abstract
The utility model is related to opacity technique field, more particularly to a kind of broad band low frequency ventilation and heat sound insulating structure.The ventilation and heat sound insulating structure of the broad band low frequency, including some Helmholtz resonators in periodic arrangement and the acoustic board structure being arranged in the Helmholtz resonator, the top and bottom of wherein described Helmholtz resonator are respectively equipped with the extension footpath that at least one extends to inside cavity, and the extension footpath is communicated with the outside；The centre of the acoustic board structure is provided with least one ventilating heat dissipating hole.The ventilation and heat sound insulating structure of the broad band low frequency, by in Helmholtz resonator built-in acoustic board structure improve the problem that insulated against sound in Helmholtz resonator caused by high frequency mode, the sound insulation of integrally-built broad band low frequency is realized, the function of ventilation and heat is realized by the extension footpath set on the ventilating heat dissipating hole and Helmholtz resonator that are opened up in acoustic board structure.
Description
Technical field
The utility model is related to opacity technique field, more particularly to a kind of broad band low frequency ventilation and heat sound insulating structure.
Background technology
Traditional opacity technique, can be effectively isolated the radio-frequency component in noise, and low-frequency noise have propagation distance it is remote,
The features such as entrant sound ability is strong, isolation difficulty is big, is always a problem of Noise measarement.
Traditional sound insulating material is controlled in the oise insulation factor of low-frequency range by mass density law, it is difficult to realized with light material low
Frequency range band insulates against sound.Meanwhile, some equipment will also reach certain cooling requirements when needing to insulate against sound processing.And sound barrier every
Also certain blast is born while sound.
Therefore, how meet broad band low frequency sound insulation require while there is ventilation and heat function, be current sound insulation room
Technical field needs the problem overcome.
Utility model content
(1) technical problem to be solved
The purpose of this utility model is to provide a kind of ventilation and heat sound insulating structure of broad band low frequency, solves traditional sound insulation skill
Art can not meet the problem of possessing ventilation and heat function while broad band low frequency sound insulation is required.
(2) technical scheme
In order to solve the above-mentioned technical problem, the utility model provides a kind of ventilation and heat sound insulating structure of broad band low frequency,
Including some Helmholtz resonators in periodic arrangement and the sound absorption being arranged in the cavity of the Helmholtz resonator
Hardened structure, the surrounding of the acoustic board structure is connected with the cavity inner wall of the Helmholtz resonator；Qi Zhong Suo Shu Hai Muhuo
Hereby the top and bottom of resonator are respectively equipped with the extension footpath that at least one extends to the inside cavity, the extension footpath with it is outer
Portion is connected；The centre of the acoustic board structure is provided with least one ventilating heat dissipating hole.
Wherein, the acoustic board structure be provided with multiple sound-absorbing hole, the sound-absorbing hole be circular port, slotted eye, square opening,
Diamond hole, hex hole or fish scale shape hole.
Wherein, the acoustic board structure is the perforated plate, micro- being fixedly connected in the cavity of the Helmholtz resonator
Perforated plate, Microfracture plate, textile fiber material plate or porous material plate.
Wherein, the acoustic board structure is the textile fabric material being filled with the cavity of the Helmholtz resonator
Material or porous material.
Wherein, the cavity of the Helmholtz resonator is cuboid or cylinder.
Wherein, the rectangular cross-section in the extension footpath or circle.
Wherein, the structure of the cross section structure and the ventilating heat dissipating hole in the extension footpath matches.
Wherein, the acoustic board structure level is arranged on the cavity centre position of the Helmholtz resonator.
Wherein, the quantity for the acoustic board structure being arranged in the Helmholtz resonator is individual layer；Or be arranged on
The quantity of the acoustic board structure in the Helmholtz resonator is multilayer, and acoustic board parallelism structural described in multilayer is set,
And there is gap between acoustic board structure described in adjacent two layers.
(3) beneficial effect
Above-mentioned technical proposal of the present utility model has the following advantages that：
The ventilation and heat sound insulating structure for the broad band low frequency that the utility model is provided, passes through the cavity in Helmholtz resonator
Middle setting acoustic board structure, to improve the problem that insulated against sound in Helmholtz resonator caused by high frequency mode, and then is realized overall
The broad band low frequency sound insulation of structure, by being set respectively to prolonging that inside cavity extends in the top and bottom of Helmholtz resonator
Major diameter, and the ventilating heat dissipating hole opened up in the acoustic board structure, to realize the ventilation and heat function of sound insulating structure.
The ventilation and heat sound insulating structure for the broad band low frequency that the utility model is provided, it is easy for installation with making is easily worked,
Cost is relatively low, and broad band low frequency defening effect is good, the good advantage of result of ventilating heat dissipation.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the ventilation and heat sound insulating structure of the utility model embodiment broad band low frequency；
Fig. 2 be the utility model embodiment broad band low frequency ventilation and heat sound insulating structure in Helmholtz resonator structure
Schematic diagram；
Fig. 3 be the utility model embodiment broad band low frequency ventilation and heat sound insulating structure in Fig. 2 sectional view；
Fig. 4 is the transmission loss curve of the ventilation and heat sound insulating structure of the utility model embodiment broad band low frequency.
In figure：1：Helmholtz resonator；2：Acoustic board structure；3：Extend footpath；4：Ventilating heat dissipating hole；5：Cavity.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
As Figure 1-3, the ventilation and heat sound insulating structure for the broad band low frequency that the utility model is provided, including some is in the cycle
The Helmholtz resonator 1 of arrangement and the acoustic board structure 2 being arranged in the Helmholtz resonator 1, the acoustic board
The surrounding of structure 2 is connected with the inwall of cavity 5 of the Helmholtz resonator 1.The upper end of wherein described Helmholtz resonator 1
At least one is respectively equipped with to the extension footpath 3 extended inside cavity 5 with lower end, and the extension footpath 3 is communicated with the outside.It is described to inhale
The centre of the hardened structure 2 of sound is provided with least one ventilating heat dissipating hole 4.
In the present embodiment, a cuboid is integrally formed in some Helmholtz resonators 1 in periodic arrangement, each
An acoustic board structure 2 is provided with the Helmholtz resonator 1, the centre of the acoustic board structure 2 leads to provided with one
Wind heat emission hole 4, the top and bottom of the Helmholtz resonator 1 are respectively equipped with one to the extension footpath extended inside cavity 5
3, the extension footpath 3 is vertically set in the Helmholtz resonator 1, and the extension footpath 3 is set with the ventilating heat dissipating hole 4
Put on the same axis.
The ventilation and heat sound insulating structure for the broad band low frequency that the utility model is provided, in Helmholtz resonator 1
Put acoustic board structure 2 to improve the problem that insulates against sound caused by high frequency mode in Helmholtz resonator, and then realize overall structure
Broad band low frequency sound insulation, by the ventilating heat dissipating hole 4 that is opened up in the acoustic board structure 2 with the Helmholtz resonator 2
The function of ventilation and heat is realized in the extension footpath 3 of setting.
Specifically, the cavity 5 of the Helmholtz resonator 1 be cuboid or cylinder, it is described in the present embodiment
Cavity 5 uses cuboid.
Specifically, the section of the rectangular cross-section in the extension footpath 3 or circle, in the present embodiment the extension footpath 3
Using circle.
Specifically, the acoustic board structure 2 is perforated plate, microperforated panel, Microfracture plate, textile fiber material or porous material
Material, can be fine using weaving according to the actual requirements when the acoustic board structure 2 is using textile fiber material or porous material
The thin plate that dimension material or porous material are made, thin plate is fixedly connected on the inwall of cavity 5 of the Helmholtz resonator 1,
Or textile fiber material or porous material are filled with the cavity 5 of the Helmholtz resonator 2, it will be filled out inside cavity 5
It is full.
Specifically, the structure of the cross section structure in the extension footpath 3 and the ventilating heat dissipating hole 4 can match, namely
Shape is identical, naturally it is also possible to use different structure.The cross section structure in the extension footpath 3 dissipates with the ventilation in the present embodiment
The structure of hot hole 4 is identical, using circular configuration.
Specifically, the acoustic board structure 2 is horizontally set on the chamber of the Helmholtz resonator 1 in the present embodiment
The centre position of body 5, can be arranged on the Helmholtz resonator 1 by the acoustic board structure 2 according to the actual requirements in addition
Cavity 5 in optional position.
Specifically, the quantity for the acoustic board structure 2 being arranged in the Helmholtz resonator 1 can be individual layer
Or multilayer, when the quantity for the acoustic board structure 2 being arranged in the Helmholtz resonator 1 is multilayer, described in multilayer
Acoustic board structure is preferably to be arranged in parallel, and there is gap between acoustic board structure described in adjacent two layers.
In addition, setting the quantity in the extension footpath 3 of the top and bottom of Helmholtz resonator 1 can phase respectively
Together, can also be different.
In addition, setting the extension footpath 3 of the top and bottom of Helmholtz resonator 1 can be same vertical respectively
On line direction, can also mutually stagger setting in actual applications certainly.
In addition, the Helmholtz resonators 1 multiple in the present embodiment press periodic arrangement into cuboid, certainly, in reality
In the application of border, multiple Helmholtz resonators 1 can be pressed to periodic arrangement into other shapes, be easy to the utility model is low
The ventilation and heat sound insulating structure of frequency range band is arranged on the diverse location of different device or equipment.
The ventilation and heat sound insulating structure for the broad band low frequency that the utility model is provided, because the acoustic board structure 2 can be adopted
It is provided with itself with perforated plate, microperforated panel, Microfracture plate, textile fiber material or porous material, namely the acoustic board structure 2
Sound-absorbing hole, and the ventilating heat dissipating hole 4 being arranged in the middle of the acoustic board structure 2 is more than the macropore of the sound-absorbing hole for size
Structure, the size of the ventilating heat dissipating hole 4 needs to be set according to the real needs of overall ventilation and heat sound insulating structure.Its
In, the sound-absorbing hole can be circular port, slotted eye, square opening, diamond hole, hex hole, fish scale shape hole or other structures
Profiled holes.
The ventilation and heat sound insulating structure for the broad band low frequency that the utility model is provided, on the basis of structure light wt is ensured, is closed
Volume, the size of the extension neck 3, the acoustic board structure of cavity 5 in the design Helmholtz resonator 1 of reason
The size of 2 punching rate and the ventilating heat dissipating hole 4, so as to pass through the built-in acoustic board in Helmholtz resonator 1
Structure 2 improves the problem that insulated against sound in Helmholtz resonator caused by high frequency mode, reaches optimal broad band low frequency sound insulation effect
Really.
Fig. 4 is the transmission loss curve using the ventilation and heat sound insulating structure of the utility model embodiment broad band low frequency, its
Middle abscissa is frequency, and ordinate is oise insulation factor, in the ventilation and heat sound insulating structure of the broad band low frequency, and the Helmholtz is total to
Shake device 1 cavity 5 using cylinder, a diameter of 100mm, the section of extension footpath 3 is using circular, a diameter of 10mm, a length of
20mm, the acoustic board structure 2 uses microperforated panel, the aperture of sound-absorbing hole for 0.2mm, and punching rate is the 4.2%, micropunch
The thickness of plate is 1mm, a diameter of 10mm of the ventilating heat dissipating hole 4, and the microperforated panel is located at the helmholtz resonance
During the centre position of device 1, a diameter of 10mm of ventilating heat dissipating hole.Then in Fig. 4 it can be seen from frequency be higher than 100Hz after, this
The oise insulation factor of sound insulating structure described in utility model has just exceeded 20dB, and maximum can reach 65dB, in 100-4000Hz frequency models
There is good sound insulation property in enclosing.
In summary, the ventilation and heat sound insulating structure for the broad band low frequency that the utility model is provided, by common in Helmholtz
Shake in device built-in acoustic board structure to improve the problem that insulates against sound caused by high frequency mode in Helmholtz resonator, and then realize whole
The broad band low frequency sound insulation of body structure, it is common by the ventilating heat dissipating hole 4 opened up in the acoustic board structure 2 and the Helmholtz
Shake the extension footpath 3 that sets on device 2 to realize the function of ventilation and heat, easy for installation, cost is low, low with processing and fabricating easily
Frequency range band defening effect is good, the good advantage of result of ventilating heat dissipation.Due to the ventilation and heat of broad band low frequency described in the utility model
Sound insulating structure has the sound insulation feature of broad band low frequency, therefore can be used as acoustic hood or sound barrier.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment technology of the utility model
The spirit and scope of scheme.
Claims (9)
1. a kind of ventilation and heat sound insulating structure of broad band low frequency, it is characterised in that：Including some Helmholtz in periodic arrangement
Resonator and the acoustic board structure being arranged in the cavity of the Helmholtz resonator, the surrounding of the acoustic board structure with
The cavity inner wall connection of the Helmholtz resonator；The top and bottom of wherein described Helmholtz resonator be respectively equipped with to
A few extension footpath to inside cavity extension, the extension footpath is communicated with the outside；The centre of the acoustic board structure
Provided with least one ventilating heat dissipating hole.
2. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：The acoustic board structure
Provided with multiple sound-absorbing hole, the sound-absorbing hole is circular port, slotted eye, square opening, diamond hole, hex hole or fish scale shape hole.
3. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：The acoustic board structure
For the perforated plate being fixedly connected in the cavity of the Helmholtz resonator, microperforated panel, Microfracture plate, textile fiber material plate
Or porous material plate.
4. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：The acoustic board structure
To be filled with the textile fiber material or porous material in the cavity of the Helmholtz resonator.
5. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：The Helmholtz is total to
Shake device cavity be cuboid or cylinder.
6. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：Section in the extension footpath
Face is rectangle or circle.
7. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：Section in the extension footpath
Face structure and the structure of the ventilating heat dissipating hole match.
8. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：The acoustic board structure
It is horizontally set on the cavity centre position of the Helmholtz resonator.
9. the ventilation and heat sound insulating structure of broad band low frequency according to claim 1, it is characterised in that：It is arranged on the last of the twelve Earthly Branches nurse
The quantity of the acoustic board structure hereby in resonator is individual layer suddenly；Or it is arranged on the suction in the Helmholtz resonator
The quantity of the hardened structure of sound is multilayer, and acoustic board parallelism structural described in multilayer is set, and acoustic board structure described in adjacent two layers it
Between there is gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720112678.8U CN206489873U (en) | 2017-02-06 | 2017-02-06 | A kind of ventilation and heat sound insulating structure of broad band low frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720112678.8U CN206489873U (en) | 2017-02-06 | 2017-02-06 | A kind of ventilation and heat sound insulating structure of broad band low frequency |
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| Publication Number | Publication Date |
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| CN206489873U true CN206489873U (en) | 2017-09-12 |
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ID=59764500
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| CN201720112678.8U Active CN206489873U (en) | 2017-02-06 | 2017-02-06 | A kind of ventilation and heat sound insulating structure of broad band low frequency |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108399911A (en) * | 2017-02-06 | 2018-08-14 | 北京市劳动保护科学研究所 | A kind of ventilation and heat sound insulating structure of broad band low frequency |
| CN109183567A (en) * | 2018-10-31 | 2019-01-11 | 徐工集团工程机械股份有限公司 | A kind of road roller Double-layer sound-insulation piggyback pod hood |
| CN110444188A (en) * | 2019-07-30 | 2019-11-12 | 华中科技大学 | A kind of underwater perforation mixing cavity structure acoustic stimulation |
| JP2019197208A (en) * | 2018-04-25 | 2019-11-14 | トヨタ モーター エンジニアリング アンド マニュファクチャリング ノース アメリカ，インコーポレイティド | Sparse acoustic absorber |
| CN111105774A (en) * | 2019-10-29 | 2020-05-05 | 同济大学 | Helmholtz resonator and low-frequency broadband sound absorption and noise reduction structure based on same |
| EP3896269A1 (en) * | 2020-04-13 | 2021-10-20 | Raytheon Technologies Corporation | Improved airfoil-mounted resonator |
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2017
- 2017-02-06 CN CN201720112678.8U patent/CN206489873U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108399911A (en) * | 2017-02-06 | 2018-08-14 | 北京市劳动保护科学研究所 | A kind of ventilation and heat sound insulating structure of broad band low frequency |
| CN108399911B (en) * | 2017-02-06 | 2024-03-22 | 北京市劳动保护科学研究所 | Ventilating, radiating and sound insulating structure of low-frequency broadband |
| JP2019197208A (en) * | 2018-04-25 | 2019-11-14 | トヨタ モーター エンジニアリング アンド マニュファクチャリング ノース アメリカ，インコーポレイティド | Sparse acoustic absorber |
| JP7007316B2 (en) | 2018-04-25 | 2022-01-24 | トヨタ モーター エンジニアリング アンド マニュファクチャリング ノース アメリカ，インコーポレイティド | Sparse sound absorbing material |
| CN109183567A (en) * | 2018-10-31 | 2019-01-11 | 徐工集团工程机械股份有限公司 | A kind of road roller Double-layer sound-insulation piggyback pod hood |
| CN110444188A (en) * | 2019-07-30 | 2019-11-12 | 华中科技大学 | A kind of underwater perforation mixing cavity structure acoustic stimulation |
| CN110444188B (en) * | 2019-07-30 | 2021-08-03 | 华中科技大学 | Underwater perforated mixed cavity structure acoustic covering layer |
| CN111105774A (en) * | 2019-10-29 | 2020-05-05 | 同济大学 | Helmholtz resonator and low-frequency broadband sound absorption and noise reduction structure based on same |
| WO2021082706A1 (en) * | 2019-10-29 | 2021-05-06 | 同济大学 | Helmholtz resonator, and low-frequency broadband sound-absorbing and noise-reducing structure based on same |
| EP3896269A1 (en) * | 2020-04-13 | 2021-10-20 | Raytheon Technologies Corporation | Improved airfoil-mounted resonator |
| US11199107B2 (en) | 2020-04-13 | 2021-12-14 | Raytheon Technologies Corporation | Airfoil-mounted resonator |
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