CN108916939A - A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution - Google Patents
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution Download PDFInfo
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- CN108916939A CN108916939A CN201810772838.0A CN201810772838A CN108916939A CN 108916939 A CN108916939 A CN 108916939A CN 201810772838 A CN201810772838 A CN 201810772838A CN 108916939 A CN108916939 A CN 108916939A
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- Prior art keywords
- filtering device
- noise filtering
- noise
- cellular
- kitchen ventilator
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution, is provided with smoke machine main body and can eliminate the cellular noise filtering device of noise, cellular noise filtering device is assemblied in smoke machine body interior.Cellular noise filtering device is distributed with multiple for eliminating the through-hole of noise.This, which has, reaches specific unifrequency noise or specific multi-frequency noise noise reduction by kitchen ventilator of the cellular noise filtering device of arrangement area distribution by adjusting the combination of the apertures of different through-holes, the edge of through-hole at a distance from the edge minimum range of adjacent through-holes or cellular noise filtering device and smoke machine main body.The kitchen ventilator has the advantages that low cost, reliability are high, and can be effectively reduced specific unifrequency noise and broadband noise, and noise reduction wide frequency range can reduce the noise of multiple frequencies.
Description
Technical field
The present invention relates to kitchen ventilator field, in particular to a kind of cellular noise filtering dress with by arrangement area distribution
The kitchen ventilator set.
Background technique
It is chronically in the environment of high noisy, the hearing of people is often damaged, and can also be made in the environment of having noise for a long time
At user emotion problem.As people's quality of the life improves, people are also lower and lower to the tolerance of noise.Therefore kitchen ventilator
Noise reduction is also got more and more attention.
Kitchen ventilator noise reduction in the prior art is mostly the reduction that noise is realized by active noise reduction and passive noise reduction mode.
Active noise reduction mode can only act on noise of the frequency within 1000Hz, can only be by passive for the noise greater than 1000Hz
Noise reduction technology processing.And the specific noise frequency of reduction can be arranged in the passive denoising device of the prior art, for not
Same kitchen ventilator, the frequency for the maximum noise that may mainly generate is not and identical, the kitchen ventilator of the prior art, for main
Frequency into noise reduction.The passive denoising device of the prior art cannot carry out noise reduction to the noise of multiband simultaneously.Due to kitchen ventilator
The noisy frequency range of generation can be 100Hz~8000Hz, it is clear that passive denoising device in the prior art can not be directed to
Kitchen ventilator generates good noise reduction effect.
Therefore, in view of the shortcomings of the prior art, providing a kind of cellular noise filtering device with by arrangement area distribution
Kitchen ventilator it is very necessary to solve prior art deficiency.
Summary of the invention
It is provided a kind of with by arrangement area distribution it is an object of the invention to avoid the deficiencies in the prior art place
The kitchen ventilator of cellular noise filtering device.This has the oil smoke function of the cellular noise filtering device by arrangement area distribution
Enough reduce specific unifrequency noise or specific multi-frequency noise noise reduction.
Above-mentioned purpose of the invention is realized by following technical measures：
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution is provided, smoke machine main body is provided with
With the cellular noise filtering device that can eliminate noise, cellular noise filtering device is assemblied in smoke machine body interior.
The cellular noise filtering device is distributed with multiple for eliminating the through-hole of noise.
The through-hole is distributed in cellular noise filtering device by arrangement region.
Preferably, above-mentioned arrangement region be rounded projections arranged, square arrangement, diamond array or in addition to above-mentioned three kinds arrange
At least one of polygonal arrangement.
The present invention is by adjusting the edge minimum range in the aperture of different through-holes, the edge of through-hole and adjacent through-holes or bee
Combination of the nido noise filtering device at a distance from smoke machine main body reaches specific unifrequency noise or specific multi-frequency noise drop
It makes an uproar.
Preferably, the aperture of above-mentioned through-hole is defined as d, and d≤30mm.
Preferably, the minimum range between the edge of above-mentioned through-hole and the edge of adjacent through-holes is b, and b is any greater than 0
Value.
Preferably, the value of above-mentioned d is multiple.
Preferably, the value of above-mentioned b is multiple.
Preferably, the d in above-mentioned same arrangement region is unique value, and b is unique value.
Preferably, there are gaps between above-mentioned cellular noise filtering device and the immediate wall surface of smoke machine main body, by between
The distance definition of gap is H1。
Preferably, above-mentioned smoke machine main body is additionally provided with sound-absorbing part, the gap that sound-absorbing part is assemblied in.
Preferably, the thickness of above-mentioned sound-absorbing part is defined as H2, and H2≤0.6H1。
Preferably, above-mentioned sound-absorbing part is fiber, PP cotton, polyester fiber, Carbon fibe or porous foam；Or
The sound-absorbing part is porous plate.
Preferably, above-mentioned cellular noise filtering device is ceramic honeycomb noise filtering device or carbon honeycomb formula noise
Filter device.
Preferably, the surface of above-mentioned cellular noise filtering device is provided with the nano coating of oleophobic.
Preferably, it is 100Hz~8000Hz that above-mentioned cellular noise filtering device, which eliminates noisy frequency range,.
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution of the invention, is provided with smoke machine
Main body and the cellular noise filtering device that can eliminate noise, cellular noise filtering device are assemblied in smoke machine body interior.
Cellular noise filtering device is distributed with multiple for eliminating the through-hole of noise.This has makes an uproar by arrangement the cellular of area distribution
The kitchen ventilator of sound filter device by adjusting the aperture of different through-holes, the edge of through-hole and adjacent through-holes edge minimum range or
Combination of the cellular noise filtering device of person at a distance from smoke machine main body reaches specific unifrequency noise or specific multi-frequency is made an uproar
Sound noise reduction.The kitchen ventilator has the advantages that low cost, reliability are high, and can be effectively reduced specific unifrequency noise and broadband
Noise, noise reduction wide frequency range can reduce the noise of multiple frequencies.
Detailed description of the invention
Using attached drawing, the present invention is further illustrated, but the content in attached drawing is not constituted to any limit of the invention
System.
Fig. 1 is the cellular noise filtering apparatus structure schematic diagram of embodiment 1.
Fig. 2 is the arrangement area schematic in Fig. 1.
Fig. 3 is the minimum range schematic diagram between the aperture of through-hole and the edge of through-hole and the edge of adjacent through-holes of Fig. 1.
Fig. 4 is arrangement area schematic.
Fig. 5 is the cellular noise filtering apparatus structure schematic diagram of embodiment 2, and the A in Fig. 5 is main view, the B in Fig. 5
For the schematic cross-section of the A in Fig. 5, the C in Fig. 5 is top view.
Fig. 6 is the cellular noise filtering device and sound-absorbing part structural schematic diagram of embodiment 3.
Fig. 1 includes into Fig. 6：
Cellular noise filtering device 1, through-hole 11, arrangement region 12,
Smoke machine main body 2, sound-absorbing part 21.
Specific embodiment
Technical solution of the present invention is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution, as shown in Figures 1 to 4, setting
There is smoke machine main body 2 and the cellular noise filtering device 1 of noise can be eliminated, cellular noise filtering device 1 is assemblied in smoke machine
Inside main body 2.Cellular noise filtering device 1 is distributed with multiple for eliminating the through-hole 11 of noise.Through-hole 11 is by arrangement region
12 are distributed in cellular noise filtering device 1.
Arrangement region 12 of the invention be rounded projections arranged, square arrangement, diamond array or in addition to above-mentioned three kinds arrange
Polygonal arrangement.The arrangement region 12 of specific the present embodiment is rounded projections arranged, and arrangement region 12 is set as 12.
The through-hole 111 of the present embodiment is to be conducive to be configured institute by arrangement region 12 by the effect in multiple arrangement regions 12
The frequency for the target noise for needing to eliminate.
The rounded projections arranged of the present embodiment, as shown in Fig. 2.It should be noted that the rounded projections arranged in the present invention is not
It is confined in Fig. 2 in A, Fig. 2 in B, Fig. 2 in C, Fig. 2 in D, Fig. 2 in E, Fig. 4 in C and Fig. 4 shown in D, any other triangle row
The arrangement region 12 of column also meets the requirement of intermediate cam shape arrangement of the present invention, also within the scope of the present invention.
It should be noted that diamond array of the invention is not limited in Fig. 4 in E and Fig. 4 shown in F, any other diamond shape row
The arrangement region 12 of column also meets the requirement of diamond array in the present invention, also within the scope of the present invention.
It should be noted that polygonal arrangement of the invention is not limited in Fig. 4 in G and Fig. 4 shown in H, it is any other polygon
The arrangement region 12 of shape arrangement also meets the requirement of polygonal arrangement in the present invention, also within the scope of the present invention.
It should be noted that arrangement region 12 of the invention can be rounded projections arranged, square arrangement, diamond array or remove
One of form of the polygonal arrangement of above-mentioned three kinds of arrangements, or the multiple groups of these four forms are closed, specifically
Embodiment according to the actual situation depending on.
The present invention is by adjusting the aperture of different through-holes 11, the edge of through-hole 11 and the edge minimum range of adjacent through-holes 11
Either combination of the cellular noise filtering device 1 at a distance from smoke machine main body 2 reaches specific unifrequency noise or specific multifrequency
Rate noise noise reduction.
The aperture of through-hole 11 of the invention is defined as d, and d≤30mm.The edge and adjacent through-holes of through-hole 11 of the invention
11 edge minimum range is b, and b is the arbitrary value greater than 0.The d in same arrangement region 12 of the invention is unique value, and b is only
One value.The d and b of the present embodiment are set as multiple.
In the constant situation of aperture d, the smaller elimination of value of the edge minimum range b at the edge and adjacent through-holes 11 of through-hole 11
Target noise frequency it is bigger.Under the edge of through-hole 11 and the constant situation of edge minimum range b of adjacent through-holes 11, aperture
The smaller target noise frequency to be eliminated of the value of d is with regard to smaller.It should be noted that when the value of value and d for b is unique, it can be with
To specific unifrequency noise noise reduction.But specific single-frequency can be combined into according to matching for the two value when b and d is multiple and different value
Rate noise or specific multi-frequency noise noise reduction.The number of the value of the value and d of b, size according to the actual situation depending on.
Denoising device principle of the invention is such：In limited closed space, cellular make an uproar is traveled in noise source
When sound filter device 1, noise reduction is carried out.Sound wave is usually propagated with opposite direction touching cellular noise filtering device 1, so greatly
Partial incidence wave can be interfered with back wave.In specific distance, about a quarter of noise source wavelength away from degree at, grain
The speed of son reaches highest.
Cellular noise filtering device 1 carries out noise reduction using the principle of resonance, when the edge of aperture d and through-hole 11 and phase
After the edge minimum range b of adjacent through-hole 11 is determined, in space specific unifrequency be already provided with the cellular of target frequency
Noise filtering device 1 forms covibration.
Through-hole 11 of the invention forms independent space in cellular noise filtering device 1, it is ensured that cellular to make an uproar
Sound filter device 1 keeps the resonant frequency of itself in sound wave under incidence angles degree, is conducive to the drop to specific frequency noise
The stability made an uproar.
When resonate occur when, the sound wave of oscillation can intensely pierce into out through-hole 11 back and forth in air, and the sound of noise can be
It is converted to friction loss during this, achievees the effect that eliminate target frequency noise.
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution of the invention is not by adjusting
With the aperture, the edge of through-hole 11 and the edge minimum range of adjacent through-holes 11 or cellular noise filtering device 1 of through-hole 11
Reach specific unifrequency noise or specific multi-frequency noise noise reduction with the combination at a distance from smoke machine main body 2.The kitchen ventilator has
The high advantage of low cost, reliability, and can be effectively reduced specific unifrequency noise and broadband noise.
Embodiment 2.
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution, as shown in figure 5, other features
It is same as Example 1, the difference is that, the arrangement region 12 of the present embodiment is square arrangement, as shown in Fig. 5.It needs
Bright, the square arrangement in the present invention is not limited in Fig. 5, in Fig. 4 in A and Fig. 4 shown in B, any other square arrangement
Arrangement region 12 also meets the requirement of square arrangement in the present invention, also within the scope of the present invention.The d and b of the present embodiment
It is only unique one value.The present embodiment is unifrequency noise noise reduction kitchen ventilator.
Experiments verify that the arrangement region 12 of the present embodiment is preferable for the noise reduction effect of square arrangement.
Embodiment 3.
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution, as shown in fig. 6, other features
It is same as Example 1, the difference is that, exist between cellular noise filtering device 1 and the immediate wall surface of smoke machine main body 2
The distance definition in gap is H by gap1。
Smoke machine main body 2 of the present invention is additionally provided with sound-absorbing part 21, the gap that sound-absorbing part 21 is assemblied in.The thickness of sound-absorbing part 21 is fixed
Justice is H2, and H2≤0.6H1。
Denoising device principle of the invention：Cellular noise filtering device 1 can be in limited closed space, in noise
When source travels to cellular noise filtering device 1, noise reduction is carried out.Sound wave usually touch cellular noise filtering device 1 with
Opposite direction is propagated, so most incidence wave can be interfered with back wave.In the fixed distance of characteristic about noise source wavelength
A quarter away from i.e. H at degree1, the speed of particle reaches highest, because the present invention passes through cellular noise filtering device 1 and smoke machine
The distance of the inner wall of main body 2 noise source wavelength a quarter away from degree at, the noise of the wavelength can be effectively eliminated.
The density and material of sound-absorbing part 21 also have an important influence, sound wave can directly through the sound-absorbing part of extremely-low density,
The frictional wear of sound energy can not be increased；Under high density, noise sound wave then can be reflected away directly, can not be entered cellular
The through-hole 11 of noise filtering device 1.Therefore sound-absorbing part 21 of the invention be preferably fiber, PP cotton, polyester fiber, Carbon fibe or
Porous foam.Or sound-absorbing part 21 is porous plate.
The determinant of the resonant frequency of cellular noise filtering device 1 of the invention：The aperture of through-hole 11, through-hole 11
At a distance from the edge minimum range or cellular noise filtering device 1 and smoke machine main body 2 of edge and adjacent through-holes 11 and through-hole
Whether 11 be independent space inside cellular noise filtering device 1, just can determine that the resonance of cellular noise filtering device 1
Frequency achievees the purpose that reduce specific frequency.
The present embodiment increases sound-absorbing part 21 compared with embodiment 1, and the setting of sound-absorbing part 21 can increase the consume of friction, reinforces drop
It makes an uproar effect.
Embodiment 4.
A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution, other features and embodiment 1
It is identical, the difference is that, the cellular noise filtering device 1 of the present embodiment is ceramic honeycomb noise filtering device 1.Honeycomb
The surface of formula noise filtering device 1 is provided with the nano coating of oleophobic.
It should be noted that cellular noise filtering device 1 of the invention is preferably ceramic honeycomb noise filtering device 1,
Can also be carbon honeycomb formula noise filtering device 1, specific embodiment according to the actual situation depending on.
It is 100Hz~8000Hz that cellular noise filtering device 1 of the invention, which eliminates noisy frequency range,.
The cellular noise filtering device 1 of the present embodiment has the advantages that durable, oleophobic and elimination noisy frequency range are wide.
Embodiment 5.
A kind of design of the kitchen ventilator with the cellular noise filtering device by arrangement area distribution：
Target frequency：8000Hz.
The aperture d=10mm of through-hole 11, the edge of through-hole 11 and the edge minimum range b=23mm, H of adjacent through-holes 111
=2.5mm, through-hole 11 are rectilinear through-hole 11.
It should be noted that the present embodiment only lists the design parameter for the single goal frequency that frequency is 8000Hz, not table
The generation present invention can only be directed to the noise of this frequency, only corresponding different parameter, and the present invention can eliminate specific unifrequent
Noise.
Embodiment 6.
A kind of design of the kitchen ventilator with the cellular noise filtering device by arrangement area distribution：
Target frequency 1：800Hz.
The aperture d=4mm of through-hole 11, the edge of through-hole 11 and the edge minimum range b=18mm, H of adjacent through-holes 111=
20mm, through-hole 11 are rectilinear through-hole 11.
Target frequency 2：800Hz.
The aperture d=5mm of through-hole 11, the edge of through-hole 11 and the edge minimum range b=23mm, H of adjacent through-holes 111=
20mm, through-hole 11 are rectilinear through-hole 11.
The present embodiment lists two different d and b combination, can produce identical target frequency.
It should be noted that the present embodiment only lists the design parameter of 800Hz target frequency, the present invention can also be for not
With unifrequent noise, target frequency is obtained by different parameter regulations, identical target frequency also can be by other parameter tune
Section combination obtains identical effect.
Embodiment 7.
A kind of design of the kitchen ventilator with the cellular noise filtering device by arrangement area distribution：
Target frequency：100Hz.
The aperture d=2mm of through-hole 11, the edge of through-hole 11 and the edge minimum range b=23mm, H of adjacent through-holes 111=
50mm, through-hole 11 are rectilinear through-hole 11.
It should be noted that the present embodiment only lists the design parameter for the single goal frequency that frequency is 100Hz, not table generation
The present invention can only be directed to the noise of this frequency, only corresponding different parameter, and the present invention can eliminate specifically unifrequent make an uproar
Sound.
Embodiment 8.
A kind of design of the kitchen ventilator with the cellular noise filtering device by arrangement area distribution：
Target frequency 1：7000Hz.
The aperture d=10mm of through-hole 11, the edge of through-hole 11 and the edge minimum range b=23mm, H of adjacent through-holes 111
=2.6mm, 11 bevel edge through-hole 11 of through-hole.
Target frequency 2：800Hz.
The aperture d=5mm of through-hole 11, the edge of through-hole 11 and the edge minimum range b=23mm, H of adjacent through-holes 111=
20mm, 11 bevel edge through-hole 11 of through-hole.
Therefore the kitchen ventilator only can be effectively eliminated in the characteristic with the corresponding through-hole 11 of above-mentioned two target frequency
The noise of corresponding frequency.
It should be noted that the present embodiment only lists the design parameter of two target frequencies, table can not only for the present invention
For the noise of two kinds of frequencies, only corresponding different parameter, the present invention can eliminate the noise of multi-frequency, reach wideband frequency drop
It makes an uproar purpose.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should be managed
Solution, can be with modifying or equivalently replacing the technical solution of the present invention, without departing from the essence and model of technical solution of the present invention
It encloses.
Claims (10)
1. a kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution, it is characterised in that：It is provided with cigarette
Owner's body and the cellular noise filtering device that can eliminate noise, cellular noise filtering device are assemblied in smoke machine main body
Portion；
The cellular noise filtering device is distributed with multiple for eliminating the through-hole of noise；
The through-hole is distributed in cellular noise filtering device by arrangement region.
2. the kitchen ventilator with the cellular noise filtering device by arrangement area distribution according to claim 1, special
Sign is：The arrangement region is rounded projections arranged, square arrangement, diamond array or the polygon arranged in addition to above-mentioned three kinds
At least one of arrangement；
By adjusting the edge minimum range or cellular noise mistake in the aperture of different through-holes, the edge of through-hole and adjacent through-holes
It filters combination of the device at a distance from smoke machine main body and reaches specific unifrequency noise or specific multi-frequency noise noise reduction.
3. the kitchen ventilator of noise filtering function spiral case according to claim 2, it is characterised in that：The aperture of the through-hole is fixed
Justice is d, and d≤30mm.
4. the kitchen ventilator of noise filtering function spiral case according to claim 3, it is characterised in that：The edge of the through-hole with
Minimum range between the edge of adjacent through-holes is b, and b is the arbitrary value greater than 0.
5. the kitchen ventilator with the cellular noise filtering device by arrangement area distribution according to claim 4, special
Sign is：The value of the d is multiple；
The value of the b is multiple.
6. the kitchen ventilator with the cellular noise filtering device by arrangement area distribution according to claim 4, special
Sign is：The d in the same arrangement region is unique value, and b is unique value.
7. the kitchen ventilator with the cellular noise filtering device by arrangement area distribution according to claim 5 or 6,
It is characterized in that：Between the cellular noise filtering device and the immediate wall surface of smoke machine main body there are gap, by gap away from
From being defined as H1。
8. the kitchen ventilator with the cellular noise filtering device by arrangement area distribution according to claim 7, special
Sign is：The smoke machine main body is additionally provided with sound-absorbing part, the gap that sound-absorbing part is assemblied in；
The thickness of the sound-absorbing part is defined as H2, and H2≤0.6H1。
9. the kitchen ventilator with the cellular noise filtering device by arrangement area distribution according to claim 8, special
Sign is：The sound-absorbing part is fiber, PP cotton, polyester fiber, Carbon fibe or porous foam；Or
The sound-absorbing part is porous plate.
10. the kitchen ventilator with the cellular noise filtering device by arrangement area distribution according to claim 9, special
Sign is：The cellular noise filtering device is that ceramic honeycomb noise filtering device or carbon honeycomb formula noise filtering fill
It sets；
The surface of the cellular noise filtering device is provided with the nano coating of oleophobic；
It is 100Hz~8000Hz that the cellular noise filtering device, which eliminates noisy frequency range,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810772838.0A CN108916939A (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810772838.0A CN108916939A (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution |
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| CN108916939A true CN108916939A (en) | 2018-11-30 |
Family
ID=64412119
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0596846A1 (en) * | 1992-11-03 | 1994-05-11 | Aktiebolaget Electrolux | Kitchen ventilator |
| CN101149296A (en) * | 2007-11-09 | 2008-03-26 | 北京航空航天大学 | Broad-band noise-reducing acoustic liner and its manufacture method |
| CN105509119A (en) * | 2016-02-18 | 2016-04-20 | 广东美的厨房电器制造有限公司 | Noise reduction device and extractor hood |
| CN106251854A (en) * | 2016-06-22 | 2016-12-21 | 潘路希 | Combination perforated plate and resonance sound-absorbing structure |
| CN106871204A (en) * | 2017-03-31 | 2017-06-20 | 广东美的厨房电器制造有限公司 | Range hood |
| CN107316632A (en) * | 2017-06-14 | 2017-11-03 | 中国农业大学 | A kind of sound absorber and sound absorption method |
-
2018
- 2018-07-14 CN CN201810772838.0A patent/CN108916939A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0596846A1 (en) * | 1992-11-03 | 1994-05-11 | Aktiebolaget Electrolux | Kitchen ventilator |
| CN101149296A (en) * | 2007-11-09 | 2008-03-26 | 北京航空航天大学 | Broad-band noise-reducing acoustic liner and its manufacture method |
| CN105509119A (en) * | 2016-02-18 | 2016-04-20 | 广东美的厨房电器制造有限公司 | Noise reduction device and extractor hood |
| CN106251854A (en) * | 2016-06-22 | 2016-12-21 | 潘路希 | Combination perforated plate and resonance sound-absorbing structure |
| CN106871204A (en) * | 2017-03-31 | 2017-06-20 | 广东美的厨房电器制造有限公司 | Range hood |
| CN107316632A (en) * | 2017-06-14 | 2017-11-03 | 中国农业大学 | A kind of sound absorber and sound absorption method |
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Application publication date: 20181130 |