CN207019366U - A kind of denoising device - Google Patents
A kind of denoising device Download PDFInfo
- Publication number
- CN207019366U CN207019366U CN201720618341.4U CN201720618341U CN207019366U CN 207019366 U CN207019366 U CN 207019366U CN 201720618341 U CN201720618341 U CN 201720618341U CN 207019366 U CN207019366 U CN 207019366U
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- perforated plate
- denoising device
- sound
- insulationg board
- noise
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Abstract
The utility model provides a kind of denoising device, to carry out noise reduction to noise source, the denoising device is spliced by several side plates and forms a host cavity, the noise source is housed in host cavity completely, at least one side plate is sound insulationg board, and the sound insulationg board includes several units that insulate against sound substantially；The denoising device also includes some perforated plates, and the perforated plate is arranged between noise source and sound insulationg board, and formed with air chamber between the perforated plate and sound insulationg board.After reaching perforated plate so as to the noise that noise source is sent, the noise of component frequency can be absorbed by perforated plate, and the noise of component frequency can be obstructed by sound insulationg board, so as to may be such that the denoising device has the sound insulation peak value of multiple different frequencies so that defening effect is optimal.
Description
Technical field
The application is related to a kind of denoising device, particularly a kind of denoising device of household electrical appliance.
Background technology
In actual life, refrigerating plant, such as refrigerator, refrigerator-freezer, noise is all very big, particularly the compressor of refrigerator, refrigerator-freezer
Caused noise makes user perplex very much, and it is always to compare to be difficult to solve in family expenses life that noise reduction how is carried out to compressor etc.
Certainly the problem of.Perforated plate is a kind of new noise reduction technology, but the noise reduction of single perforated plate is often not ideal enough, because
This, it is necessary to design a kind of excellent noise reduction effect, cost not high denoising device again.
Utility model content
In order to one of solve the above problems, present applicant proposes a kind of denoising device.
To achieve these goals, the technical scheme that the embodiment of the application one provides is as follows：
A kind of denoising device, to carry out noise reduction to noise source, the denoising device is spliced simultaneously by several side plates
A host cavity is formed, the noise source is housed in host cavity completely, and at least one side plate is sound insulationg board, the sound insulationg board
Including several units that insulate against sound substantially；The denoising device also includes some perforated plates, the perforated plate be arranged at noise source and
Between sound insulationg board, and formed with air chamber between the perforated plate and sound insulationg board.
As further improvement of the utility model, the perforated plate and sound insulationg board are arranged in parallel, the perforated plate
On offer some perforation.
As further improvement of the utility model, the denoising device also includes fixed plate, and the fixed plate is described in
The edge of perforated plate sets and the perforated plate is fixed on sound insulationg board.
As further improvement of the utility model, if what the perforated plate extended including plate-like body and from body
The body can be fixed on sound insulationg board by involvement socket part, the connecting portion.
As further improvement of the utility model, the thickness of the body is in 0.2mm to 15mm.
As further improvement of the utility model, the punching rate of perforated plate is between 0.5% to 20%.
As further improvement of the utility model, the material of the body is metal.
The beneficial effects of the utility model：The noise source also includes perforated plate, shape between the perforated plate and sound insulationg board
Into air chamber, after reaching perforated plate so as to the noise that noise source is sent, the noise of component frequency can be absorbed by perforated plate, and portion
The noise of crossover rate can be obstructed by sound insulationg board again, so as to may be such that the denoising device has the sound insulation peak of multiple different frequencies
Value so that defening effect is optimal.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, forms the part of the application, this Shen
Schematic description and description please is used to explain the application, does not form the improper restriction to the application.In the accompanying drawings：
Fig. 1 is the structural representation of the first embodiment of the utility model denoising device；
Fig. 2 is the structural representation of the first embodiment of the utility model denoising device；
Fig. 3 is the first embodiment structural representation of basic sound insulation unit in the utility model；
Fig. 4 is second of embodiment structural representation of basic sound insulation unit in the utility model.
Embodiment
To make the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described corresponding accompanying drawing.Obviously, described embodiment is only the application one
Section Example, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Go out under the premise of creative work the every other embodiment obtained, belong to the scope of the application protection.
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model
Limitation.
In description of the present utility model, it is to be understood that term " longitudinal direction ", " transverse direction ", " on ", " under ", " preceding ",
The orientation or position relationship of the instruction such as " rear ", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " are based on attached
Orientation or position relationship shown in figure, it is for only for ease of and describes the utility model and simplify to describe, rather than instruction or hint
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of utility model.
In description of the present utility model, unless otherwise prescribed with restriction, it is necessary to explanation, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be mechanical connection or the company of electrical connection or two element internals
It is logical, can be joined directly together, can also be indirectly connected by intermediary, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
The utility model provides a kind of denoising device 100, to carry out noise reduction process to noise source 3.It is common, family
In life, the noise of compressor, motor etc. is very big, the inconvenience brought to family life, therefore, it is necessary to which pressure can be directed to by designing one kind
The denoising device 100 for the noise sources such as mechanical, electrical machine 3 that contract.
The denoising device 100 is spliced by several side plates and forms a host cavity, and the noise source 3 houses completely
In host cavity, at least one side plate is sound insulationg board 4, and the sound insulationg board 4 includes several units that insulate against sound substantially.The drop
Device 100 of making an uproar also includes perforated plate 5, and the perforated plate 5 is arranged between sound insulationg board 4 and perforated plate 5, and the perforated plate 5
Air chamber is formed between sound insulationg board 4.
The perforated plate 5 is the sheet material with perforation.The material of perforated plate 5 is mostly metal, such as stainless steel plate, aluminium
Plate, iron plate, low carbon steel plate, copper coin etc., the shape of perforation can also by a variety of, such as circular hole, square hole, diamond hole, it is tri-angle-holed,
Five-pointed star hole, slotted hole etc..In the present embodiment, the perforated plate 5 is microperforated panel, i.e. the smaller perforated plate of piercing aperture
5.Perforated plate 5, particularly microperforated panel can be used as silencer use, and air-flow can be eliminated in wider frequency band range again and made an uproar
Sound, and there is high temperature resistant, resistance to greasy dirt, corrosion resistant performance, even if carrying large quantity of moisture in air-flow, work is nor affected on, therefore,
The higher occasion of the humidity such as kitchen in particularly suitable family.It is common, it is provided with multiple perforation on the perforated plate 5.
As shown in figure 1, the denoising device 100 also includes fixed plate 51, the perforated plate 5 and fixed plate 51 are not one
Shaping, but be connected with each other by connected modes such as buckle, screws, edge of the fixed plate 51 along the perforated plate 5 is set
And the perforated plate 5 is fixed on sound insulationg board 4.Hole is not provided with the fixed plate 51.
Or as shown in Fig. 2 the perforated plate 5 includes plate-like body 52 and some connections extended from body 52
The body 52 can be fixed on sound insulationg board by portion 53, the connecting portion 53.Accordingly, it is not provided with wearing on the connecting portion 53
Hole.In the present embodiment, the body 52 and connecting portion 53 are integrally formed setting.
Hereinafter, the specific noise reduction process of the perforated plate 5 is illustrated.In explanation, with the perforated plate 5 and fix
Exemplified by the not integrally formed embodiment of plate 51.Specifically, by the setting of perforated plate 5, the denoising device 100 is interior to form one
, should or multiple discrete helmholtz resonance sound absorbers, so-called discrete helmholtz resonance sound absorber refer to the closing chamber of small size
Open osculum, or the open-ended cavity being spliced by multi-sheets in the side of closing chamber.In the present embodiment, the perforated plate 5
And sound insulationg board 4 is positioned on the main transaudient path of noise source 3, will the perforated plate 5 and sound insulationg board 4 be positioned over noise energy compared with
For the opening position of concentration, and avoid being placed on the nodel line position of specific spectrogram parameter, it is preferable so as to be carried out to noise energy
Absorption and isolation.
It is arranged in parallel between the perforated plate 5 and sound insulationg board 4, to cause the air between perforated plate 5 and sound insulationg board 4
Thickness degree is consistent.In addition, the thickness of air chamber between perforated plate 5 and sound insulationg board 4 is designated as L.The thickness of the body exists
0.2mmm to 15mm, the thickness of the body is consistent and surface is smooth, to reach more preferable noise reduction.In addition, will
The thickness of the body is designated as T.Preferably, the thickness of the body in 0.2mm between 1mm.
Between 0.5% to 20%, the punching rate refers in unit area the punching rate of the microperforated panel, total face of perforating
The ratio between product and unit area, are generally expressed as a percentage.In addition, it is preferable that punching rate is designated as into P, the punching rate be 1% to
3%。
The diameter of the perforation in 0.2mm between 8mm, in addition, the diameter of perforation is designated as into d.Preferably, the perforation
Diameter within 1mm.
By selecting different body thickness, air layer thickness, penetration hole diameter, punching rate, you can control the frequency of silencer
Spectrality energy, it is set to obtain good soundproof effect in the frequency range of needs.
Specifically, resonance sound-absorbing system, institute are formed between air layer between the perforated plate 5 and perforated plate 5 and sound insulationg board 4
Stating the intrinsic frequency f0 of resonance sound-absorbing device can utilize the structures described above parameter of the system to be expressed as：
Wherein, c refers to the spread speed of sound.
So as to which when sound wave incident is to the resonance sound-absorbing system, the motion of the air in perforation can be caused.And sound insulationg board 4
Air chamber between perforated plate 5 plays a part of spring, and restoring force is provided to the air in perforation.So as in sound wave and sky
In air cavity under the interaction of air, air in the perforation back and forth movement in perforation.It is somebody's turn to do when the frequency of the sound wave of incidence is equal to
During the intrinsic frequency of resonance sound-absorbing system, system resonates, the motion repeatedly that the air in perforation can be violent, and and micro-pore wall
Friction, heat energy is almost completely converted to by acoustic energy.
Therefore, the peak value for the noise that sound insulationg board 4 can be used to send the noise source 3 is handled, and the perforated plate 5
And the resonance sound-absorbing system that the air chamber at the rear of perforated plate 5 is formed can be used for carrying out other peak values beyond the noise peak
Processing.
Specifically, can be seen that from above-mentioned formula, increase punching rate, reduce body thickness, reduce perforated plate 5 and sound insulationg board 4
Between the thickness of air chamber can increase intrinsic frequency f0；Opposite, reduce punching rate, increase body thickness, increase and wear
The thickness of air chamber between orifice plate 5 and sound insulationg board 4 can reduce intrinsic frequency f0.So as to change intrinsic frequency f0.Surveying
After amount obtains the noise data of noise source 3, you can the frequency where the correlation peak of noise is obtained, to be carried out with intrinsic frequency f0
Contrast, so as to obtain preferable acoustically effective.
In addition, as described above, the sound insulationg board 4 includes several sound insulation units.
As shown in figure 3, be a kind of embodiment of basic sound insulation unit provided by the utility model, wherein, it is described substantially every
Sound unit includes the outer framework 1 set in a ring and through the resettlement section at the outer framework both ends.The basic sound insulation unit is also
Including the film being covered on outer framework one or both ends and the mass being contained in resettlement section 2.Because film is substantially in saturating
Bright shape, therefore be not shown in figure.The material of the film is flexible material, softer, and accordingly, the mass 2 is by close
The material that degree is high and rigidity is high is made.In the present embodiment, the film is made up of silicon rubber, and thinner thickness, the matter
Gauge block 2 is fabricated from iron, so as to which the combined material that the film and mass 2 are formed can have one or more resonance
Frequency, on these resonant frequencies, the propagation of sound wave is obstructed significantly.
The mass 2 includes the particle with regular shape, in the present embodiment, the particle bag of the regular shape
Include Part-spherical particle or cylindrical particle.Also, the mass 2 is usually metallic particles.The material of the outer framework 1 is
Plastics or EVA.
Specifically, because the film is formed at the one or both ends of outer framework 1, so as to the film and the outer framework
1 phase reclines；The mass 2 is pasted or snapped connection in the film surface again, so as to which the mass 2 and the film have
Flexible contact.Due to film be present between outer framework 1 and mass 2 both high rigidity materials, it is thus possible in the presence of due to
Low-frequency resonance caused by relative motion between mass 2 and outer framework 1.But because the size of mass 2 is less than noise
The wavelength of low frequency noise caused by source 3, and the impedance mismatching between outer framework 1 and film is quite big, consequently only that a small number of
Energy can be transferred to scattering object from transmission wave.But such case may have change drastically near resonant frequency.Altogether
On vibration frequency, the effective impedance increase of mass 2 and film combinations unit, thus the energy of ripple may be transferred to resonance scattering
Body.Particularly, in the frequency of slightly below resonant frequency, effective elastic constant is probably negative.Thus, on these frequencies,
Ripple can not transmit, and the absorption forced to stay on.Exhaled so as to which the basic sound insulation unit in present embodiment can absorb noise source 3
Low-frequency noise.
As shown in figure 4, being the embodiment of another basic sound insulation unit provided by the utility model, the basic sound insulation is single
Member includes the outer framework 1 set in a ring and through the resettlement section at the outer framework both ends.The basic sound insulation unit also includes
The film being covered on outer framework one or both ends and the mass 2 being contained in resettlement section.The mass 2 is not fixed
On film, but it is directly connected to be fixed on outer framework 1.Specifically, the basic sound insulation unit includes obligatory point 21, it is described
Obligatory point 21 is divided into the both sides of the mass 2 and is connected with the outer framework 1.The obligatory point 21 and the outer framework
1 inner side is fixedly connected, and in the present embodiment, the film is arranged in the opening at the both ends of the outer framework 1 so that institute
The receiving space that basic sound insulation unit forms closing is stated, the obligatory point 21 leans with the film.Because the film is in
Transparence, therefore without mark in figure.So as to, resulting film can the shape of free vibration part inhibit constraint
The total transmissivity vibration mode of body 21, but its low frequency total reflection vibration mode is remained, it is achieved thereby that to the light of incident acoustic wave
Thin efficiently isolation.
In addition, opposite sides side of the both ends of the obligatory point 21 respectively with the outer framework 1 is connected to a fixed, so that
The obligatory point 21 is obtained to be fixed in the outer framework 1.And the entirety of the obligatory point 21 is relatively thin, and mass 2 is then relative
It is thicker, so as to the center section that the center of gravity of whole basic sound insulation unit is the mass, then shake also essentially from it is described about
The center section of beam body 21.In addition, the 1 rectangular shape of outer framework, then the obligatory point 21 in strip and with outer framework 1 not
Two connected sides are parallel.
So as to can sufficiently utilize the space of existing structure, and can preferably improve noise reduction.It is described thin two layers
The thickness and material parameter of film can be different, so as to realize two kinds of different groundwork frequency ranges simultaneously.
Sound-absorbing material is filled with the basic sound insulation unit.The sound-absorbing material is filled between double-layer filmses, so as to
The obligatory point 21 and mass 2 are contained in inside the sound-absorbing material.Preferably, the sound-absorbing material be glass fibre cotton or
Closed-cell foam etc. is opened, so as to further lift integrally-built sound absorption energy-dissipating property.
Specifically, in the present embodiment, double-layer filmses are provided with the outer framework 1, double-layer filmses can be formed two layers
Unit is shaken, and the stack combinations of a variety of vibration modes can be realized, significantly more efficient isolation is carried out to sound wave so that be described basic
Insulate against sound the oise insulation factor entirety lifting about 10dB of unit.On the basis of being superimposed with film, in the basic sound insulation unit
Portion's filling sucting sound material, cause 3 ~ 5dB of oise insulation factor entirety lifting again.Due to pressing close to mutually between double-layer filmses, generation is utilized
Decay wave interaction so that strong coupling is produced between two films, the acoustic pressure between two films is drastically raised, acoustic density adds
Greatly, the sound-absorbing material of thin layer is even filled, now its sound absorption efficiency will also be significantly increased, so as to not increase sound-absorbing material thickness
Transmission acoustic energy is greatly reduced on the premise of degree and weight, receives the low frequency noise reduction of overlength.
In the present embodiment, the through hole 22 being formed through in the obligatory point 21, the through hole 22 is along double-layer filmses
Between be distributed, with facilitate radiating.
In summary, the invention provides a kind of denoising device 100 of noise source 3, be provided with the denoising device 100 every
Sound plate 4 and acoustical cotton 5, so as to the noise multiple reflections for sending noise source 3, and acoustical cotton 5 absorbs to noise, from
And can both prevent that noise from leaking, noise reduction can be carried out again, largely reduce the noise of noise source 3.
It should be appreciated that although this specification is described according to embodiment, not each embodiment is only only comprising one
Vertical technical scheme, this narrating mode of specification is only that those skilled in the art should be by specification for clarity
As an entirety, the technical solutions in the various embodiments may also be suitably combined, formed it will be appreciated by those skilled in the art that
Other embodiment.
The a series of detailed description of those listed above is only for the specific of possible embodiments of the present utility model
Illustrate, and be not used to limit the scope of protection of the utility model, all equivalent realities made without departing from the utility model skill spirit
Apply example or change should be included within the scope of protection of the utility model.
Claims (8)
- A kind of 1. denoising device, to carry out noise reduction to noise source, it is characterised in that：The denoising device is spelled by several side plates Connect and form and formed a host cavity, the noise source is housed in host cavity completely, and at least one side plate is sound insulationg board, institute Stating sound insulationg board includes several units that insulate against sound substantially；The denoising device also includes some perforated plates, and the perforated plate is arranged at Between noise source and sound insulationg board, and formed with air chamber between the perforated plate and sound insulationg board.
- 2. denoising device according to claim 1, it is characterised in that：The perforated plate and sound insulationg board are arranged in parallel, Some perforation are offered on the perforated plate.
- 3. denoising device according to claim 2, it is characterised in that：The denoising device also includes fixed plate, described solid Edge of the fixed board along the perforated plate sets and the perforated plate is fixed on sound insulationg board.
- 4. denoising device according to claim 1, it is characterised in that：The perforated plate includes plate-like body and from originally The body can be fixed on sound insulationg board by some connecting portions of body extension, the connecting portion.
- 5. denoising device according to claim 3, it is characterised in that：The thickness of the perforated plate is in 0.2mm to 15mm.
- 6. denoising device according to claim 3, it is characterised in that：The punching rate of the perforated plate 0.5% to 20% it Between.
- 7. denoising device according to claim 3, it is characterised in that：The diameter of the perforation is in 0.2mm between 8mm.
- 8. denoising device according to claim 3, it is characterised in that：The material of the perforated plate is metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618341.4U CN207019366U (en) | 2017-05-31 | 2017-05-31 | A kind of denoising device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618341.4U CN207019366U (en) | 2017-05-31 | 2017-05-31 | A kind of denoising device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207019366U true CN207019366U (en) | 2018-02-16 |
Family
ID=61477405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720618341.4U Active CN207019366U (en) | 2017-05-31 | 2017-05-31 | A kind of denoising device |
Country Status (1)
| Country | Link |
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| CN (1) | CN207019366U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838282A (en) * | 2019-11-21 | 2020-02-25 | 珠海格力电器股份有限公司 | Composite sound absorption device and method for drying air duct of washing machine and washing machine |
| CN110894669A (en) * | 2019-11-21 | 2020-03-20 | 珠海格力电器股份有限公司 | Silencing structure of washing machine drying air duct and washing machine |
-
2017
- 2017-05-31 CN CN201720618341.4U patent/CN207019366U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838282A (en) * | 2019-11-21 | 2020-02-25 | 珠海格力电器股份有限公司 | Composite sound absorption device and method for drying air duct of washing machine and washing machine |
| CN110894669A (en) * | 2019-11-21 | 2020-03-20 | 珠海格力电器股份有限公司 | Silencing structure of washing machine drying air duct and washing machine |
| CN110838282B (en) * | 2019-11-21 | 2021-04-09 | 珠海格力电器股份有限公司 | Composite sound absorption device and method for drying air duct of washing machine and washing machine |
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