CN209013256U - A kind of kitchen ventilator with noise filtering device - Google Patents
A kind of kitchen ventilator with noise filtering device Download PDFInfo
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- CN209013256U CN209013256U CN201821124973.6U CN201821124973U CN209013256U CN 209013256 U CN209013256 U CN 209013256U CN 201821124973 U CN201821124973 U CN 201821124973U CN 209013256 U CN209013256 U CN 209013256U
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Abstract
A kind of kitchen ventilator with noise filtering device is provided with smoke machine main body and can reduce the noise filtering device of multi-frequency noise, and noise filtering device is assemblied in smoke machine main body；The shortest distance of any point on the surface of noise filtering device to smoke machine main body wall surface is defined as h, and multiple unequal h, h can arbitrarily be greater than 0 numerical value.The noise filtering device is able to maintain long-term good noise reduction effect, which, which has, is easy to arrange, and dust, the grease on surface etc. can remove cleaning.The noise filtering device has low cost, reliability high.The material of the noise filtering device is anticorrosive, chemical resistance and is hardly damaged.Narrow frequency noise and broadband noise is effectively reduced, noise reduction frequency range is big, can reduce the noise of multiple frequencies.
Description
Technical field
The utility model relates to kitchen ventilator field, in particular to a kind of kitchen ventilator with noise filtering device.
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 passive denoising device of the prior art can only be handled for the noise of single-frequency section, it cannot be right
The noise of multiband carries out noise reduction.Since the noisy frequency range that kitchen ventilator generates can be 100Hz~8000Hz, it is clear that existing
In technology good noise reduction effect can not be generated for kitchen ventilator for the passive denoising device of single-frequency section.
Therefore in view of the shortcomings of the prior art, providing a kind of kitchen ventilator with noise filtering device to solve prior art deficiency
It is very necessary.
Utility model content
The purpose of this utility model is that avoiding in place of the deficiencies in the prior art and providing a kind of with noise filtering device
Kitchen ventilator.The kitchen ventilator with noise filtering device has the advantages that multi-frequency noise can be reduced.
The above-mentioned purpose of the utility model is realized by following technical measures:
A kind of kitchen ventilator with noise filtering device is provided, smoke machine main body is provided with and the noise of multi-frequency noise can be reduced
Filter device, noise filtering device are assemblied in smoke machine main body.
Minimum range by any point on the surface of noise filtering device to smoke machine main body wall surface is spent surely for h, h can be with
Any numerical value greater than 0, and multiple unequal h.
Preferably, above-mentioned noise filtering device is set as panel.
Preferably, the horizontal highest point of above-mentioned panel and horizontal bottom position difference in height are defined as Δ h, and Δ h≤100mm.
Preferably, above-mentioned panel is mutation formula panel or gradual change type panel.
Another preferred, above-mentioned noise filtering device is set as panel.
Preferably, above-mentioned panel is flat panel.
Preferably, above-mentioned panel is provided with multiple.
Preferably, above-mentioned multiple panel-mounteds are at non-planar continuous limited encirclement structural body or discontinuous limited encirclement
Structural body.
Preferably, above-mentioned panel is provided with multiple through-holes.
Preferably, the aperture of above-mentioned through-hole is defined as d, and d≤30mm.
Preferably, the value of above-mentioned d is multiple.
Preferably, the edge minimum range of the edge of above-mentioned through-hole and adjacent through-holes is b, and b is the arbitrary value greater than 0.
Preferably, the value of above-mentioned b is multiple.
The utility model by adjusting the aperture of different through-holes, the edge of through-hole and adjacent through-holes edge minimum range,
The via regions of panel are distributed or the combination of distance of noise filtering device to smoke machine main body reaches multi-frequency noise noise reduction.
There are gaps between panel and the immediate wall surface of smoke machine main body, are H by the distance definition in gap1。
Preferably, above-mentioned noise filtering device is additionally provided with sound-absorbing part, and sound-absorbing part assembles smoke machine main body.
Preferably, the thickness of above-mentioned sound-absorbing part is defined as H, and H≤0.6H1。
Preferably, above-mentioned sound-absorbing part is fixed on the outer surface of panel；Or
The sound-absorbing part is fixed on the surface of panel Yu the nearest wall surface of smoke machine main body；Or
The sound-absorbing part is fixed between panel and the nearest wall surface gap of smoke machine main body.
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, the shape of above-mentioned through-hole is circle, ellipse, triangle, square, rectangle, pentagon, six sides
At least one of shape, diamond shape or irregular shape.
Preferably, above-mentioned through-hole is at least one of rectilinear through-hole or bevel edge through-hole.
Panel is metal decking, plastic front board or alloy panel.
Panel is connected with reinforced structure.
Preferably, above-mentioned reinforced structure is convex closure, recessed packet or reinforcing rib.
A kind of kitchen ventilator with noise filtering device of the utility model is provided with smoke machine main body and can reduce multi-frequency and makes an uproar
The noise filtering device of sound, noise filtering device are assemblied in smoke machine main body；Any point on the surface of noise filtering device is arrived
The minimum range of smoke machine main body wall surface is spent surely can arbitrarily be greater than 0 numerical value, and multiple unequal h for h, h.In the prior art
Denoising device, single-frequency section noise reduction can only be directed to.A kind of kitchen ventilator with noise filtering device of the utility model passes through
Adjust the aperture of different through-holes, the edge of through-hole and adjacent through-holes edge minimum range, the via regions of panel distribution or
The combination of distance of noise filtering device to smoke machine main body reaches multi-frequency noise noise reduction.The noise filtering device is able to maintain for a long time
Good noise reduction effect, which, which has, is easy to arrange, and dust, the grease on surface etc. can remove cleaning.This is made an uproar
Sound filter device has the advantages that low cost, reliability are high.The material of the noise filtering device is for anticorrosive, chemical resistance and not
It is easy to damage.It can be effectively reduced narrow frequency noise and broadband noise, noise reduction wide frequency range 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 a kind of structural schematic diagram of kitchen ventilator embodiment 1 with noise filtering device of the utility model.
Fig. 2 is the panel schematic diagram in Fig. 1, and the A in Fig. 2 is main view, and the B in Fig. 2 is top view.
Fig. 3 is the mutation formula panel construction schematic diagram of the utility model, and (1) A in Fig. 3 is main view, (1) in Fig. 3
B is the top view of (1) A in Fig. 3, and (2) A in Fig. 3 is main view, the top view that (2) B in Fig. 3 is (2) A in Fig. 3.
Fig. 4 is the gradual change type panel construction schematic diagram of the utility model, and (1) A in Fig. 4 is the main view of gradual change type panel
Figure, the top view that (1) B in Fig. 4 is (1) A in Fig. 4, (2) A in Fig. 4 are the main view of gradual change type panel, in Fig. 4
(2) B is the top view of (2) A in Fig. 4, and (3) A in Fig. 4 is the main view of gradual change type panel,
The top view that (3) B in Fig. 4 is (3) A in Fig. 4.
Fig. 5 is a kind of structural schematic diagram of kitchen ventilator with noise filtering device of embodiment 2.
Fig. 6 is a kind of structural schematic diagram of kitchen ventilator with noise filtering device of embodiment 3.
Fig. 7 is the schematic diagram in the aperture of embodiment 4 and the center of through-hole.
Fig. 8 is a kind of structural schematic diagram of kitchen ventilator embodiment 5 with noise filtering device.
Fig. 9 is the rectilinear through-hole schematic cross-section of embodiment 6.
Figure 10 is bevel edge through hole section schematic diagram.
Figure 11 is the panel construction schematic diagram of the utility model embodiment 7.
Fig. 1 includes into Figure 11:
Noise filtering device 1, panel 11, through-hole 111, reinforced structure 112, sound-absorbing part 12,
Smoke machine main body 2.
Specific embodiment
The technical solution of the utility model is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator with noise filtering device is provided with smoke machine main body 2 and can reduce multifrequency as shown in Figure 1 to Figure 3
The noise filtering device 1 of rate noise, height differential noise filtering device 1 are assemblied in smoke machine main body 2.
The minimum range of any point on the surface of noise filtering device 1 to smoke machine main body wall surface is spent surely for h, h can be with
Any numerical value greater than 0, and multiple unequal h.Specifically there are two unequal h values for the present embodiment, and two h values are all big
In 0.The value of the h of specific the utility model, can be two unequal h values, or 2 or more any number, and h value
0 numerical value can be arbitrarily greater than.
At the fixed distance of the characteristic about a quarter of noise source wavelength is away from degree, the speed of particle reaches highest, Yin Ben
Utility model by noise filter at a distance from the inner wall of smoke machine main body 2 at a quarter of noise source wavelength is away from degree
That is h can effectively eliminate the noise of the wavelength.Therefore same kitchen ventilator has the value of multiple h, is adapted to eliminate different wave length
Noise source, reach the noise reduction of multi-frequency noise.
The noise filtering device 1 of the present embodiment is set as panel 11.The horizontal highest point of panel 11 and horizontal bottom position are high
Degree difference is defined as Δ h, and Δ h≤100mm.The specific Δ h=50mm of the present embodiment.Panel 11 is provided with multiple through-holes.
It should be noted that Δ h can be less than any positive number of 100mm, the tool Δ h=50mm of the present embodiment.The present embodiment
Δ h=50mm be to be supported according to experimental data because preferable to wideband frequency noise reduction in this numerical value.
The panel 11 of the present embodiment is preferably mutation formula panel 11, as shown in Fig. 2, the panel 11 of the utility model can also be with
For gradual change type panel 11, specific embodiment according to the actual situation depending on.
The mutation formula panel 11 of the utility model is not limited to be mutated formula face as shown in (1) of Fig. 2, Fig. 3 and (2) of Fig. 3
Plate 11, any other mutation formula 11 modes of panel are also within the protection scope of the present utility model.The gradual change type of the utility model
Panel 11 is not limited to the gradual change type panel 11 as shown in (3) of (1) of Fig. 4, (2) of Fig. 4 and Fig. 4, any other gradual change type
11 mode of panel is also within the protection scope of the present utility model.
The denoising device principle of the utility model: noise filtering device 1 can be in limited closed space, in noise source
When traveling to noise filtering device 1, noise reduction is carried out.Sound wave is usually propagated with opposite direction touching noise filtering device 1, so
Most incidence wave can be interfered with back wave.The utility model is provided with the value of multiple h in same kitchen ventilator, is suitable for
In the noise source for eliminating different wave length, reach the noise reduction of multi-frequency noise.
Noise filtering device 1 carries out noise reduction using the principle of resonance, and when resonance occurs, the sound wave of oscillation in air can
Through-hole 111 is intensely pierced into out back and forth, and the sound of noise can be converted to friction loss in the process, reach elimination target frequency
The effect of noise.
The kitchen ventilator with noise filtering device is provided with smoke machine main body 2 and can reduce the noise filtering of multi-frequency noise
Device 1, noise filtering device 1 are assemblied in smoke machine main body 2.Denoising device in the prior art, can only be for single target frequency
Rate noise reduction.The noise filtering device 1 is able to maintain long-term good noise reduction effect, and the noise filtering device 1 is excellent with being easy to arrange
Point, dust, the grease on surface etc. can be cleared up by disassembly.The noise filtering device 1 has low cost, reliability high simultaneously
Advantage.The material of the noise filtering device 1 is anticorrosive, chemical resistance and is hardly damaged.Can be effectively reduced narrow frequency noise and
Broadband noise, noise reduction wide frequency range can reduce the noise of multiple frequencies.
Embodiment 2.
A kind of kitchen ventilator with noise filtering device, as shown in figure 5, other features are same as Example 1, difference exists
In the noise filtering device 1 of the present embodiment is set as panel 11.Panel 11 is flat panel 11.Panel 11 is provided with multiple, tool
Body is three.Three panels 11 are assembled into continuous limited encirclement structural body.It can know in conjunction with Fig. 5, the actual h of the present embodiment
Value has numerous unequal value.
It should be noted that the panel 11 of the utility model can be set there are two or above any positive integer, and
Multiple panels 11 are assembled into discontinuous limited encirclement structural body, depending on specific embodiment is with actual conditions.
The present embodiment compared with Example 1 the advantages of be that noise source can be placed in the center of structural body, make noise mistake
Filter device 1 fills noise source and surrounds to the greatest extent, to reach maximum drop effect.
Embodiment 3.
A kind of kitchen ventilator with noise filtering device, as shown in fig. 6, other features are same as Example 1, difference exists
In the noise filtering device 1 of the present embodiment is set as panel 11.There are two the settings of panel 11, and the specific panel 11 is gradual change
Formula panel 11, two gradual change type panels 11 are assembled into discontinuous limited encirclement structural body.It can know in conjunction with Fig. 6, the present embodiment
Actual h value have numerous unequal value.
It should be noted that the panel 11 of the utility model can be set there are two or above any positive integer, and
Multiple panels 11 are assembled into discontinuous limited encirclement structural body, while panel 11 can be gradual change type panel 11, or
Mutation formula panel 11 or gradual change type panel 11, depending on specific embodiment is with actual conditions.
The present embodiment compared with Example 1 the advantages of be that noise source can be placed in the center of structural body, make noise mistake
Noise source inside filter device 1 can be surrounded to the greatest extent, to reach maximum drop effect.The gradual change type panel simultaneously
11 are able to cooperate the shape of the inside of smoke machine main body 2.
Embodiment 4.
A kind of kitchen ventilator with noise filtering device, as shown in fig. 7, other features are same as Example 1, difference exists
In the aperture of the through-hole 111 of the present embodiment is defined as d, and d≤30mm.The edge of through-hole 111 and the edge of adjacent through-holes 111
Minimum range is b, and b is the arbitrary value greater than 0.The value of the d and b of the present embodiment are all multiple.
The utility model is in the constant situation of aperture d, the edge of through-hole 111 and the edge minimum range of adjacent through-holes 111
The target noise frequency of the smaller elimination of the value of b is bigger.In the edge of through-hole 111 and the edge minimum range b of adjacent through-holes 111
In constant situation, the smaller target noise frequency to be eliminated of the value of aperture d is with regard to smaller.
Noise filtering device 1 carries out noise reduction using the principle of resonance, when the edge of aperture d and through-hole 111 and adjacent logical
After the edge minimum range b in hole 111 is determined, specific noise frequency and the noise filtering for being already provided with target frequency in space
Device 1 forms covibration.
When resonance occurs, the sound wave of oscillation can intensely pierce into out through-hole 111, the sound energy of noise back and forth in air
It is converted to friction loss in the process, achievees the effect that eliminate target frequency noise.
The utility model is by adjusting the aperture of different through-holes 111, the edge at the edge of through-hole 111 and adjacent through-holes 111
The combination of distance of minimum range, 111 area distribution of through-hole of panel 11 or noise filtering device 1 to smoke machine main body 2 reaches
The purpose of multi-frequency noise noise reduction.
A kind of kitchen ventilator with noise filtering device of the utility model can by adjusting different through-holes 111 aperture and
The edge of through-hole 111 and the edge minimum range of adjacent through-holes 111, are reduced the noise of different target frequency, to pass through
Division, arrangement and the arrangement in 11 through-hole of panel, 111 region can achieve wideband frequency noise reduction purpose.
Embodiment 5.
A kind of kitchen ventilator with noise filtering device, as shown in figure 8, other features are same as Example 1, difference exists
In there are gap between the panel 11 and the immediate wall surface of smoke machine main body 2 of the present embodiment, the distance in gap is h.Noise filtering
Device 1 is additionally provided with sound-absorbing part 12, and sound-absorbing part assembles smoke machine main body 2.The thickness of sound-absorbing part 12 is defined as H, and H≤0.6h.
The sound-absorbing part 12 of the present embodiment is fixed on the outer surface of panel 11.It should be noted that the sound-absorbing part 12 of the utility model
Panel 11 and smoke machine main body are fixed in the surface or sound-absorbing part 12 that panel 11 and the nearest wall surface of smoke machine main body 2 can also be fixed on
Between 2 nearest wall surface gaps, depending on specific embodiment is with actual conditions.
The density and material of sound-absorbing part 12 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 enter noise mistake
Filter the through-hole 111 of device 1.Therefore the utility model sound-absorbing part 12 be preferably fiber, PP cotton, polyester fiber, carbon fiber or
Porous foam.Or sound-absorbing part 12 is porous plate.
The present embodiment increases sound-absorbing part 12 compared with embodiment 1, and the setting of sound-absorbing part 12 can increase the consume of friction, reinforces drop
It makes an uproar effect.
Embodiment 6.
A kind of kitchen ventilator with noise filtering device, other features are same as Example 1, the difference is that, this is practical
Novel through-hole 111 it is conveniently of circular shape because round upper relatively easy in technique production, and doing because of not no corner angle
It disturbs, noise reduction effect is optimal.It should be noted that the shape of through-hole 111 may be ellipse, triangle, square, rectangle, five
Side shape, hexagon, diamond shape or irregular shape, or the combination of the shape of above-mentioned a variety of through-holes 111, it is specific to implement
Depending on mode is with actual conditions.
The through-hole 111 of the present embodiment is preferably rectilinear through-hole 111, as shown in figure 9, it should be noted that the utility model leads to
Hole 111 or bevel edge through-hole 111, as shown in Figure 10, or combinations of the above, specific embodiment is with practical feelings
Depending on condition.
Noise filtering can be improved in the diversity choice of the shape of the distribution mode and through-hole 111 of the through-hole 111 of the present embodiment
The flexibility ratio that device 1 designs.
Embodiment 7.
A kind of kitchen ventilator with noise filtering device, as shown in figure 11, other features are same as Example 1, difference
It is, the panel 11 of the present embodiment is specially metal decking 11, it should be noted that the panel 11 of the utility model or modeling
Charge level plate 11 or alloy panel 11, depending on specific embodiment is with actual conditions.
The panel 11 of the present embodiment is connected with reinforced structure 112.Specific reinforced structure 112 is reinforcing rib.
It should be noted that the reinforced structure 112 of the utility model or convex closure or recessed packet, or Duo Zhongren
Meaning combination, depending on specific embodiment is with actual conditions.
Compared with Example 1, the more rigid of panel 11 is low resistance structure to the present embodiment.Low resistance structure can make into
Ejected wave and back wave have out of phase under the specific distance with reflecting surface, so that the sound wave of noise can cancel out each other, from
And reduce the intensity of noise.The panel 11 of the metal of the present embodiment has the advantages that high temperature resistant, durable.
Embodiment 8.
A kind of design of the kitchen ventilator with noise filtering device:
Target frequency 1:7000Hz.
The aperture d=10mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm of adjacent through-holes 111,
H=2.6mm.
Target frequency 2:100Hz.
The aperture d=2mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm, h of adjacent through-holes 111
=50mm.
Therefore the noise filtering device 1 of the kitchen ventilator is only in the spy with the corresponding through-hole 111 of above-mentioned two target frequency
Property can effectively eliminate 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.
Embodiment 9.
A kind of design of the kitchen ventilator with noise filtering device:
Target frequency 1:8000Hz.
The aperture d=10mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm of adjacent through-holes 111,
H=2.5mm.
Target frequency 2:800Hz.
The aperture d=5mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm, h of adjacent through-holes 111
=20mm.
Therefore the noise filtering device 1 of the kitchen ventilator is only in the spy with the corresponding through-hole 111 of above-mentioned two target frequency
Property can effectively eliminate 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 with noise filtering device, it is characterised in that: it is provided with smoke machine main body and multi-frequency noise can be reduced
Noise filtering device, noise filtering device is assemblied in smoke machine main body；
The minimum range of any point on the surface of noise filtering device to smoke machine main body wall surface is spent surely for h, h can be arbitrarily large
In 0 numerical value, and multiple unequal h.
2. the kitchen ventilator according to claim 1 with noise filtering device, it is characterised in that: the noise filtering device is set
It is set to panel；
The horizontal highest point of the panel and horizontal bottom position difference in height are defined as Δ h, and Δ h≤100mm.
3. the kitchen ventilator according to claim 2 with noise filtering device, it is characterised in that: the panel is mutation formula face
Plate or gradual change type panel.
4. the kitchen ventilator according to claim 1 with noise filtering device, it is characterised in that: the noise filtering device is set
It is set to panel；
The panel is flat panel.
5. the kitchen ventilator with noise filtering device according to claim 2 to 4 any one, it is characterised in that: panel is set
It is equipped with multiple；
The multiple panel-mounted is at non-planar continuous limited encirclement structural body or discontinuous limited encirclement structural body.
6. the kitchen ventilator according to claim 5 with noise filtering device, it is characterised in that: the panel is provided with multiple
Through-hole；
The aperture of the through-hole is defined as d, and d≤30mm；
The value of the d is multiple.
7. the kitchen ventilator according to claim 6 with noise filtering device, it is characterised in that: the edge of the through-hole and phase
The edge minimum range of adjacent through-hole is b, and b is the arbitrary value greater than 0；
The value of the b is multiple.
8. the kitchen ventilator according to claim 7 with noise filtering device, it is characterised in that: by adjusting different through-holes
Edge minimum range, the distribution of the via regions of panel or the noise filtering device in aperture, the edge of through-hole and adjacent through-holes arrive
The combination of the distance of smoke machine main body reaches multi-frequency noise noise reduction；
There are gap between panel and the immediate wall surface of smoke machine main body, the distance in gap is h；
The noise filtering device is additionally provided with sound-absorbing part, and sound-absorbing part assembles smoke machine main body；
The thickness of the sound-absorbing part is defined as H, and H≤0.6h.
9. a kind of kitchen ventilator with noise filtering device according to claim 8, it is characterised in that: the sound-absorbing part is fixed
In the outer surface of panel；Or
The sound-absorbing part is fixed on the surface of panel Yu the nearest wall surface of smoke machine main body；Or
The sound-absorbing part is fixed between panel and the nearest wall surface gap of smoke machine main body；
The sound-absorbing part is fiber, PP cotton, polyester fiber, carbon fiber or porous foam；Or
The sound-absorbing part is porous plate.
10. a kind of kitchen ventilator with noise filtering device according to claim 9, it is characterised in that: the shape of the through-hole
Shape be circle, in ellipse, triangle, square, rectangle, pentagon, hexagon, diamond shape or irregular shape at least
It is a kind of；
The through-hole is at least one of rectilinear through-hole or bevel edge through-hole；
Panel is metal decking, plastic front board or alloy panel；
Panel is connected with reinforced structure；
The reinforced structure is convex closure, recessed packet or reinforcing rib.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731068A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731068A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering device |
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