CN208794488U - A kind of kitchen ventilator of the cellular noise filtering device of band - Google Patents
A kind of kitchen ventilator of the cellular noise filtering device of band Download PDFInfo
- Publication number
- CN208794488U CN208794488U CN201821121225.2U CN201821121225U CN208794488U CN 208794488 U CN208794488 U CN 208794488U CN 201821121225 U CN201821121225 U CN 201821121225U CN 208794488 U CN208794488 U CN 208794488U
- Authority
- CN
- China
- Prior art keywords
- filtering device
- hole
- noise filtering
- cellular
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Ventilation (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A kind of kitchen ventilator of the cellular noise filtering device of band is provided with smoke machine main body and can eliminate the cellular noise filtering device of noise, and 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.The shape of through-hole is at least one of circle, ellipse, triangle, square, rectangle, pentagon, hexagon, diamond shape or irregular shape.The kitchen ventilator with cellular noise filtering device reaches specific unifrequency noise or specific multi-frequency noise noise reduction 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 utility model relates to kitchen ventilator field, in particular to the kitchen ventilator of a kind of cellular noise filtering device of band.
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, the kitchen ventilator for providing a kind of cellular noise filtering device of band is existing to solve
Technical deficiency is very necessary.
Utility model content
The purpose of this utility model is that providing a kind of cellular noise filtering of band in place of avoiding the deficiencies in the prior art
The kitchen ventilator of device.The kitchen ventilator with cellular noise filtering device can reduce specific unifrequency noise or specific multifrequency
Rate noise noise reduction.
The above-mentioned purpose of the utility model is realized by following technical measures:
A kind of kitchen ventilator of cellular noise filtering device of band is provided, smoke machine main body is provided with and the bee of noise can be eliminated
Nido noise filtering device, 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.
The shape of through-hole is circle, ellipse, triangle, square, rectangle, pentagon, hexagon, diamond shape or not
At least one of regular shape.
The utility model 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.
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 appointing greater than 0
Meaning value.
Preferably, the value of above-mentioned d is multiple.
Preferably, the value of above-mentioned b is multiple.
Preferably, above-mentioned through-hole is rectilinear through-hole, corresponding through-hole while with cellular noise filtering device while it is vertical or
Person is parallel；Or
The through-hole is bevel edge through-hole, and the side of the longitudinal section of through-hole and cellular noise filtering device is at angle a；Or
The side of the through-hole longitudinal section is curve；Or
The side of the longitudinal section of the through-hole is at least one of broken line.
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 fiber 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 of the cellular noise filtering device of band of the utility model is provided with smoke machine main body and can eliminate
The cellular noise filtering device of 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.The shape of through-hole is circle, ellipse, triangle, square, rectangular
At least one of shape, pentagon, hexagon, diamond shape or irregular shape.The oil smoke with cellular noise filtering device
Machine by adjusting the aperture of different through-holes, the edge of through-hole and adjacent through-holes edge minimum range or cellular noise filtering
Combination of the device at a distance from smoke machine main body reaches specific unifrequency noise or specific multi-frequency noise noise reduction.The oil smoke equipment
Have the advantages that low cost, reliability are high, and can be effectively reduced specific unifrequency noise and broadband noise, noise reduction frequency range
Width can reduce the noise of multiple frequencies.
Detailed description of the invention
The utility model is further described using attached drawing, but the content in attached drawing is not constituted to the utility model
Any restrictions.
Fig. 1 is the cellular noise filtering apparatus structure schematic diagram of embodiment 1.
Fig. 2 is the cellular noise filtering apparatus structure schematic diagram of embodiment 2, and the A in Fig. 2 is main view, and the B in Fig. 2 is
The schematic cross-section in the direction A in Fig. 2, the C in Fig. 2 are top view.
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. 2.
Fig. 4 is the cellular noise filtering device schematic perspective view of embodiment 2.
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 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. 5.
Fig. 7 is the cellular noise filtering apparatus structure schematic diagram of embodiment 3, and the A in Fig. 7 is main view, the B in Fig. 7
For the schematic cross-section of the A in Fig. 7, the C in Fig. 7 is top view.
Fig. 8 is a kind of range hood structure schematic diagram of the cellular noise filtering device of band of embodiment 3.
Fig. 1 includes into Fig. 8:
Cellular noise filtering device 1, through-hole 11,
Smoke machine main body 2, sound-absorbing part 21.
Specific embodiment
The technical solution of the utility model is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator of the cellular noise filtering device of band is provided with smoke machine main body 2 and can disappear as shown in Figures 1 to 3
Except the cellular noise filtering device 1 of noise, cellular noise filtering device 1 is assemblied in inside smoke machine main body 2.Cellular noise
Filter device 1 is distributed with multiple for eliminating the through-hole 11 of noise.
The shape of the utility model through-hole 11 is circle, ellipse, triangle, square, rectangle, pentagon, six sides
At least one of shape, diamond shape or irregular shape.The present embodiment through-hole 11 is preferably shaped to hexagon.
It should be noted that the shape of through-hole 11 may be ellipse, triangle, square, rectangle, pentagon, six sides
Shape, diamond shape or irregular shape, or the combination of the shape of above-mentioned a variety of through-holes 11, specific embodiment is with reality
Depending on situation.
The utility model is minimum by adjusting the edge in the aperture of different through-holes 11, the edge of through-hole 11 and adjacent through-holes 11
The combination of distance or cellular noise filtering device 1 at a distance from smoke machine main body 2 reaches specific unifrequency noise or specific
Multi-frequency noise noise reduction.
The aperture of the through-hole 11 of the utility model is defined as d, and d≤30mm；Wherein the value of d is 1.The utility model
The edge of through-hole 11 and the edge minimum range of adjacent through-holes 11 are b, and b is the arbitrary value greater than 0, and wherein the value of b is 1.This
The kitchen ventilator of embodiment is the kitchen ventilator for eliminating unifrequency noise.
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.
The denoising device principle of the utility model is such that travel to honeycomb in noise source in limited closed space
When formula noise filtering device 1, noise reduction is carried out.Sound wave is usually propagated with opposite direction touching cellular noise filtering device 1, institute
It can be interfered with back wave with most incidence wave.In specific distance, about a quarter of noise source wavelength away from degree
Place, the speed of particle reach 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.
The through-hole 11 of the utility model forms independent space in cellular noise filtering device 1, it is ensured that honeycomb
Formula noise filtering device 1 keeps the resonant frequency of itself in sound wave under incidence angles degree, is conducive to specific frequency noise
Noise reduction stability.
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 of the cellular noise filtering device of the band of the utility model by adjusting different through-holes 11 aperture,
The edge of through-hole 11 and the edge minimum range of adjacent through-holes 11 or cellular noise filtering device 1 and smoke machine main body 2 away from
From combination reach specific unifrequency noise or specific multi-frequency noise noise reduction.The kitchen ventilator has low cost, reliability high
The advantages of, and can be effectively reduced specific unifrequency noise and broadband noise.
Embodiment 2.
A kind of kitchen ventilator of the cellular noise filtering device of band, as shown in Figs. 4-6, other features are same as Example 1,
The difference is that the value of the through-hole 11d and b of the present embodiment are 2.The kitchen ventilator of the present embodiment is to eliminate multi-frequency noise
Kitchen ventilator the present embodiment through-hole 11 be bevel edge through-hole 11, the side of the longitudinal section of through-hole 11 and cellular noise filtering device 1
At angle a.
Aperture for multiple cross sections of bevel edge through-hole 11 is actually multiple values, therefore corresponding through-hole 11 is bevel edge
Through-hole 11 also can be used in reducing the multi-frequency noise in 11 space of through-hole.
It should be noted that the through-hole 11 of the utility model can be bevel edge through-hole 11, the longitudinal section of the through-hole 11 and honeycomb
The side of formula noise filtering device 1 is at angle；Through-hole 11 or rectilinear through-hole 11, the side of corresponding through-hole 11 and cellular noise
The side of filter device 1 is vertical or parallel；Or the side of 11 longitudinal section of through-hole is curve；Or the longitudinal section of through-hole 11
Side be broken line any one meaning, or multiple combinations of this above 4 kinds of modes, specific embodiment according to the actual situation and
It is fixed.
Compared with Example 1, the value of the d and b of this implementation are two, the combination of the two can Cheng Erwei eliminate multi-frequency and make an uproar
Sound.11 inner space of through-hole of the present embodiment is used to adjust the noise for eliminating different frequency, improves the frequency range of noise.
Embodiment 3.
A kind of kitchen ventilator of the cellular noise filtering device of band, as shown in fig. 7, other features are same as Example 2, it is different
Place is that the shape of the through-hole 11 of the present embodiment is hexagon and circular combination.Through-hole 11 is rectilinear through-hole 11, corresponding logical
Hole 11 while with cellular noise filtering device 1 while it is vertical or parallel.
The circular through hole 11 of the present embodiment is upper relatively easy in technique production, and because of the interference of not no corner angle, with embodiment 2
It is optimal compared to noise reduction effect.Compared with Example 2, the through-hole 11 of the present embodiment is rectilinear through-hole 11, because rectilinear through-hole 11 exists
Technique production is upper relatively easy.The present embodiment compared with Example 2, increases the diversity of 11 shape of through-hole setting.
Embodiment 4.
A kind of kitchen ventilator of the cellular noise filtering device of band, as shown in figure 8, other features are same as Example 1, it is different
Place is that there are gaps between cellular noise filtering device 1 and the immediate wall surface of smoke machine main body 2, by the distance in gap
It is defined as H1。
The denoising device principle of the utility model: cellular noise filtering device 1 can in limited closed space,
When noise source travels to cellular noise filtering device 1, noise reduction is carried out.Sound wave is usually touching cellular noise filtering device
1 is propagated with opposite direction, 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 utility model passes through cellular noise filtering device 1
With at a quarter of noise source wavelength is away from degree, the wavelength can be effectively eliminated at a distance from the inner wall of smoke machine main body 2
Noise.
Smoke machine main body 2 is additionally provided with sound-absorbing part 21, and the thickness of sound-absorbing part 21 is defined as H2, and H2≤0.6H1.Sound-absorbing part 21
The gap being assemblied in.
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 the sound-absorbing part 21 of the utility model is preferably fiber, PP cotton, polyester fiber, carbon fiber
Or porous foam.Or sound-absorbing part 21 is porous plate.
The determinant of the resonant frequency of the cellular noise filtering device 1 of the utility model: the aperture of through-hole 11, through-hole
At a distance from the edge minimum range or cellular noise filtering device 1 and smoke machine main body 2 of 11 edge and adjacent through-holes 11 and
Whether through-hole 11 is independent space inside cellular noise filtering device 1, just can determine that cellular noise filtering device 1
Resonant 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 5.
A kind of kitchen ventilator of the cellular noise filtering device of band, other features are same as Example 1, the difference is that,
The cellular noise filtering device 1 of the present embodiment is ceramic honeycomb noise filtering device 1.Cellular noise filtering device 1
Surface is provided with the nano coating of oleophobic.
It should be noted that the cellular noise filtering device 1 of the utility model is preferably ceramic honeycomb noise filtering dress
Set 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 the cellular noise filtering device 1 of the utility model, 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 6.
A kind of design of the kitchen ventilator of the cellular noise filtering device of band:
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 noise of this frequency can only be directed to for the utility model, only corresponding different parameter, the utility model can be eliminated specifically
Unifrequent noise.
Embodiment 7.
A kind of design of the kitchen ventilator of the cellular noise filtering device of band:
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 utility model can also be with needle
To different unifrequent noises, target frequency is obtained by different parameter regulations, identical target frequency can also be joined by others
Number adjusts combination and obtains identical effect.
Embodiment 8.
A kind of design of the kitchen ventilator of the cellular noise filtering device of band:
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 utility model can only be directed to the noise of this frequency, and only corresponding different parameter, the utility model can eliminate specific list
The noise of frequency.
Embodiment 9.
A kind of design of the kitchen ventilator of the cellular noise filtering device of band:
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 is not for the utility model
It can only be directed to the noise of two kinds of frequencies, only corresponding different parameter, the utility model can eliminate the noise of multi-frequency, reach wide
Band frequency noise reduction purpose.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model rather than to this is practical
The limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, the common skill of this field
Art personnel, which should be appreciated that, can be modified or replaced equivalently technical solutions of the utility model, practical new without departing from this
The spirit and scope of type technical solution.
Claims (10)
1. a kind of kitchen ventilator of the cellular noise filtering device of band, it is characterised in that: it is provided with smoke machine main body and can eliminate and make an uproar
The cellular noise filtering device of sound, cellular noise filtering device are assemblied in smoke machine body interior；
The cellular noise filtering device is distributed with multiple for eliminating the through-hole of noise；
The shape of the through-hole is circle, in ellipse, triangle, square, rectangle, pentagon, hexagon or diamond shape
At least one.
2. the kitchen ventilator of the cellular noise filtering device of band according to claim 1, it is characterised in that: by adjusting difference
The edge minimum range in the aperture of through-hole, the edge of through-hole and adjacent through-holes or cellular noise filtering device and smoke machine main body
The combination of distance reach specific unifrequency noise or specific multi-frequency noise noise reduction.
3. the kitchen ventilator of the cellular noise filtering device of band according to claim 2, it is characterised in that: the hole of the through-hole
Diameter is defined as d, and d≤30mm.
4. the kitchen ventilator of the cellular noise filtering device of band according to claim 3, it is characterised in that: the side of the through-hole
Minimum range between edge and the edge of adjacent through-holes is b, and b is the arbitrary value greater than 0.
5. the kitchen ventilator of the cellular noise filtering device of band according to claim 4, it is characterised in that: the value of the d is
It is multiple；
The value of the b is multiple.
6. the kitchen ventilator of the cellular noise filtering device of band according to claim 5, it is characterised in that: the through-hole is straight
Side through-hole, corresponding through-hole while with cellular noise filtering device while it is vertical or parallel；Or
The through-hole is bevel edge through-hole, and the side of the longitudinal section of through-hole and cellular noise filtering device is at angle a；Or
The side of the through-hole longitudinal section is curve；Or
The side of the longitudinal section of the through-hole is at least one of broken line.
7. the kitchen ventilator of the cellular noise filtering device of band according to claim 6, it is characterised in that: it is described cellular to make an uproar
There are gaps between sound filter device and the immediate wall surface of smoke machine main body, are H by the distance definition in gap1。
8. the kitchen ventilator of the cellular noise filtering device of band according to claim 7, it is characterised in that: the smoke machine main body
It 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 of the cellular noise filtering device of band according to claim 8, it is characterised in that: the sound-absorbing part is
Fiber, PP cotton, polyester fiber, carbon fiber or porous foam；Or
The sound-absorbing part is porous plate.
10. the kitchen ventilator of the cellular noise filtering device of band according to claim 9, it is characterised in that: it is described cellular
Noise filtering device is ceramic honeycomb noise filtering device or carbon honeycomb formula noise filtering device；
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 |
|---|---|---|---|
| CN201821121225.2U CN208794488U (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator of the cellular noise filtering device of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821121225.2U CN208794488U (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator of the cellular noise filtering device of band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208794488U true CN208794488U (en) | 2019-04-26 |
Family
ID=66202474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821121225.2U Active CN208794488U (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator of the cellular noise filtering device of band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208794488U (en) |
-
2018
- 2018-07-14 CN CN201821121225.2U patent/CN208794488U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108731081B (en) | Range hood with noise filtering function exhaust component | |
| CN108954435A (en) | A kind of band by the spiral camber noise filtering device of arrangement area distribution kitchen ventilator | |
| CN208431852U (en) | A kind of kitchen ventilator with water conservancy diversion noise filtering device | |
| CN208794486U (en) | A kind of kitchen ventilator with the cellular noise filtering device of multilayer | |
| CN208794488U (en) | A kind of kitchen ventilator of the cellular noise filtering device of band | |
| CN108731065A (en) | A kind of kitchen ventilator with noise filtering function guiding subassembly | |
| CN208794487U (en) | A kind of kitchen ventilator of the multi-frequency noise filtering of the multiple panel zones of band | |
| CN209013256U (en) | A kind of kitchen ventilator with noise filtering device | |
| CN108731072A (en) | A kind of kitchen ventilator with the cellular noise filtering device of multilayer | |
| CN209622875U (en) | A kind of kitchen ventilator with noise filtering function guiding subassembly | |
| CN208431851U (en) | A kind of kitchen ventilator of the three-dimensional noise filtering device of band | |
| CN208431853U (en) | A kind of kitchen ventilator with multilayer water conservancy diversion noise filtering device | |
| CN208794489U (en) | A kind of kitchen ventilator with multilayer noise filtering device | |
| CN108731077A (en) | A kind of kitchen ventilator of the cellular noise filtering device of band | |
| CN208794490U (en) | A kind of kitchen ventilator that can reduce specific unifrequency noise | |
| CN108731067A (en) | A kind of kitchen ventilator of the multi-frequency noise filtering of the multiple panel zones of band | |
| CN209229815U (en) | A kind of kitchen ventilator with water conservancy diversion noise filtering device | |
| CN209655387U (en) | A kind of kitchen ventilator of multi-frequency noise interference device | |
| CN108954436A (en) | A kind of kitchen ventilator with the cellular noise filtering device of multi-frequency | |
| CN108954429A (en) | A kind of kitchen ventilator with the non-planar noise filtering device of multi-frequency | |
| CN108954431A (en) | A kind of band can reduce the kitchen ventilator of the cellular noise filtering device of specific unifrequency | |
| CN108954433A (en) | A kind of through-hole presses the multi-frequency noise filtering kitchen ventilator of arrangement area distribution | |
| CN108731071A (en) | A kind of kitchen ventilator with water conservancy diversion noise filtering device | |
| CN108954439A (en) | A kind of kitchen ventilator with spiral camber noise filtering device | |
| CN209744446U (en) | Range hood exhaust nozzle pipe with noise interference device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |