CN108731071A - A kind of kitchen ventilator with water conservancy diversion noise filtering device - Google Patents
A kind of kitchen ventilator with water conservancy diversion noise filtering device Download PDFInfo
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- CN108731071A CN108731071A CN201810772833.8A CN201810772833A CN108731071A CN 108731071 A CN108731071 A CN 108731071A CN 201810772833 A CN201810772833 A CN 201810772833A CN 108731071 A CN108731071 A CN 108731071A
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- Prior art keywords
- water conservancy
- conservancy diversion
- filtering device
- deflector
- noise filtering
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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
- F24C15/2035—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)
- Filtering Of Dispersed Particles In Gases (AREA)
- Ventilation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
A kind of kitchen ventilator with water conservancy diversion noise filtering device is provided with smoke machine main body, spiral case and the water conservancy diversion noise filtering device that can reduce specific unifrequency noise or multi-frequency noise.Water conservancy diversion noise filtering device and spiral case are assemblied in smoke machine body interior respectively, and water conservancy diversion noise filtering device coordinates with spiral case.Water conservancy diversion noise filtering device is set as deflector.By adjusting the edge of the apertures of different through-holes, through-hole, either water conservancy diversion noise filtering device reaches specific unifrequency noise or multi-frequency noise noise reduction to the kitchen ventilator with the combination at a distance from smoke machine main body with the edge minimum range of adjacent through-holes.The water conservancy diversion noise filtering device can keep long-term good noise reduction, which, which has, is easy to arrange, and dust, the grease on surface etc. can remove cleaning.The water conservancy diversion noise filtering device has the advantages that low cost, reliability are high.The advantages of material of the water conservancy diversion noise filtering device is anticorrosive, chemical resistance and is hardly damaged, while can effectively reduce narrow frequency noise and broadband noise.
Description
Technical field
The present invention relates to kitchen ventilator field, more particularly to a kind of kitchen ventilator with water conservancy diversion noise filtering device.
Background technology
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 increasingly paid attention to.
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 more 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, is directed to main
Frequency into noise reduction.Again since the noisy frequency range that kitchen ventilator generates can be 100Hz~8000Hz, it is clear that single-frequency
The passive denoising device of section can not be directed to kitchen ventilator and generate good noise reduction.
Therefore, in view of the shortcomings of the prior art, a kind of kitchen ventilator with water conservancy diversion noise filtering device of offer is to solve existing skill
Art deficiency is very necessary.
Invention content
It provides it is an object of the invention to avoid in place of the deficiencies in the prior art a kind of with water conservancy diversion noise filtering device
Kitchen ventilator.The kitchen ventilator with water conservancy diversion noise filtering device can reduce specific unifrequency noise or multi-frequency noise noise reduction.
The above-mentioned purpose of the present invention is realized by following technical measures：
A kind of kitchen ventilator with water conservancy diversion noise filtering device is provided, smoke machine main body, spiral case are provided with and specific list can be reduced
The water conservancy diversion noise filtering device of frequency noise or multi-frequency noise.
Water conservancy diversion noise filtering device and spiral case are assemblied in smoke machine body interior, and water conservancy diversion noise filtering device and spiral case respectively
Cooperation.
Water conservancy diversion noise filtering device is set as deflector.
Deflector is provided with tapering and panel body, and tapering is integrally connected to panel body, and the peak in tapering is directed toward snail
Wind wheel center inside shell.
Preferably, above-mentioned water conservancy diversion noise filtering device is distributed with multiple for eliminating specific unifrequency noise or multi-frequency
The through-hole of noise.
The present invention by adjusting the aperture of different through-holes, the edge of through-hole and adjacent through-holes edge minimum range or lead
Combination of the flow noise filter device at a distance from smoke machine main body reaches specific unifrequency noise or multi-frequency noise noise reduction.
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 minimum range between the edge of above-mentioned through-hole and the edge of adjacent through-holes is b, and b is arbitrary more than 0
Value.
Preferably, the value of above-mentioned b is multiple.
Preferably, the projected area in above-mentioned tapering is at least the half of spiral case air-admitting surface.
Preferably, the minimum range of above-mentioned water conservancy diversion noise filtering device and wind turbine is 30mm~200mm.
Preferably, above-mentioned deflector is provided with multiple, is respectively defined as the first deflector and the second deflector, the first water conservancy diversion
Plate and the second deflector are assemblied in the opposite both sides of spiral case respectively.
Preferably, above-mentioned first deflector is provided with multiple, and the parallel side for being assemblied in spiral case of multiple first deflectors.
Preferably, above-mentioned second deflector is provided with multiple, and multiple second deflectors are parallel is assemblied in the another of spiral case
Side.
Preferably, there are gaps between above-mentioned deflector and smoke machine main body, are H by the distance definition in gap1。
Preferably, above-mentioned water conservancy diversion noise filtering device is additionally provided with sound-absorbing part, and sound-absorbing part is assemblied in deflector towards smoke machine
The outer surface of main body.
Preferably, the thickness of above-mentioned sound-absorbing part is defined as H2, and H2≤0.6H1。
Preferably, above-mentioned sound-absorbing part is provided with multiple, and sound-absorbing part is a pair of with the first deflector and the second deflector one respectively
It answers.
Preferably, above-mentioned sound-absorbing part is assemblied in the first deflector towards the outer surface of smoke machine main body respectively.
Preferably, above-mentioned sound-absorbing part is assemblied in the second deflector towards the outer surface of smoke machine main body respectively.
Preferably, above-mentioned sound-absorbing part is fiber, PP cottons, polyester fiber, Carbon fibe or porous foam；Or
The sound-absorbing part is porous plate.
Preferably, above-mentioned deflector is metal deflector, plastics deflector or alloy deflector.
Preferably, above-mentioned deflector is connected with reinforced structure.
Preferably, above-mentioned reinforced structure is convex closure, recessed packet or reinforcing rib.
Preferably, the thickness of above-mentioned deflector is less than 20mm.
Preferably, it is 100Hz~8000Hz that above-mentioned water conservancy diversion noise filtering device, which eliminates noisy frequency range,.
A kind of kitchen ventilator with water conservancy diversion noise filtering device of the present invention, is provided with smoke machine main body, spiral case and can reduce spy
The water conservancy diversion noise filtering device of order frequency noise or multi-frequency noise.Water conservancy diversion noise filtering device and spiral case are assemblied in respectively
Smoke machine body interior, and water conservancy diversion noise filtering device coordinates with spiral case.Water conservancy diversion noise filtering device is set as deflector.Deflector
It is provided with tapering and panel body, tapering is integrally connected to panel body, and the peak in tapering is directed toward in the wind wheel inside spiral case
The heart.Denoising device in the prior art can only be directed to single target frequency noise reduction.A kind of band water conservancy diversion noise filtering of the present invention
The kitchen ventilator of device by adjusting the aperture of different through-holes, the edge of through-hole and adjacent through-holes edge minimum range or water conservancy diversion
Combination of the noise filtering device at a distance from smoke machine main body reaches specific unifrequency noise or multi-frequency noise noise reduction.The water conservancy diversion
Noise filtering device can keep long-term good noise reduction, which, which has, is easy to arrange, the ash on surface
Dirt, grease etc. can remove cleaning.The water conservancy diversion noise filtering device has the advantages that low cost, reliability are high.The water conservancy diversion noise
The advantages of material of filter device is anticorrosive, chemical resistance and is hardly damaged, while can effectively reduce narrow frequency noise and width
Band noise.
Description of the drawings
Using attached drawing, the present invention is further illustrated, but the content in attached drawing does not constitute any limit to the present invention
System.
Fig. 1 is a kind of range hood structure schematic diagram with water conservancy diversion noise filtering device of embodiment 1.
Fig. 2 is deflector schematic diagram in Fig. 1.
Fig. 3 is the edge minimum range schematic diagram at the edge and adjacent through-holes of the through-hole of deflector in Fig. 1.
Fig. 4 is a kind of kitchen ventilator stereoscopic schematic diagram with water conservancy diversion noise filtering device of embodiment 2.
Fig. 5 is a kind of kitchen ventilator stereoscopic schematic diagram with water conservancy diversion noise filtering device of embodiment 3.
Fig. 6 is deflector structure schematic diagram in embodiment 4.
In Fig. 1 to Fig. 6, include：
Water conservancy diversion noise filtering device 1,
Deflector 11, through-hole 111, reinforced structure 112, tapering 113, panel body 114,
Sound-absorbing part 12,
Spiral case 2,
Smoke machine main body 3.
Specific implementation mode
Technical scheme of the present invention is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator with water conservancy diversion noise filtering device is provided with smoke machine main body 3, spiral case 2 and energy as shown in Figs. 1-3
Reduce the water conservancy diversion noise filtering device 1 of specific unifrequency noise or multi-frequency noise.Water conservancy diversion noise filtering device 1 and spiral case 2
It is assemblied in respectively inside smoke machine main body 3, and water conservancy diversion noise filtering device 1 coordinates with spiral case 2.
Water conservancy diversion noise filtering device 1 is set as deflector 11.Deflector 11 is provided with tapering 113 and panel body 114, cone
Portion 113 is integrally connected to panel body 114, and the peak in tapering 113 is directed toward the wind wheel center inside spiral case 2.Water conservancy diversion noise mistake
Multiple through-holes 111 for eliminating multi-frequency noise are distributed in filter device 1.
The present invention is minimum by adjusting the aperture of different through-holes 111, the edge of through-hole 111 and the edge of adjacent through-holes 111
Apart from the either specific unifrequency noise of combination of the water conservancy diversion noise filtering device 1 at a distance from smoke machine main body 3 or multi-frequency noise
Noise reduction.
The aperture of the through-hole 111 of the present invention is defined as d, and d≤30mm；Wherein the value of d is 2.The edge of through-hole 111 with
The edge minimum range of adjacent through-holes 111 is b, and b is the arbitrary value more than 0, and wherein the value of b is 2.The kitchen ventilator of the present embodiment
To eliminate the kitchen ventilator of multi-frequency noise.
In aperture, d is constant, and the value of the edge of through-hole 111 and the edge minimum range b of adjacent through-holes 111 are smaller to disappear
The target noise frequency removed is bigger.It is constant at the edge of through-hole 111 and the edge minimum range b of adjacent through-holes 111,
The smaller target noise frequency to be eliminated of the value of aperture d is with regard to smaller.
It should be noted that when the value of the value and d for b is unique, it can be to specific unifrequency noise noise reduction.But work as b
It can be according to the two value with being combined into specific unifrequency noise or multi-frequency noise noise reduction when with d being multiple and different values.B's
The number of value and the value of d, size are depending on actual conditions.
The projected area in tapering 113 is at least the half of 2 air-admitting surface of spiral case.Water conservancy diversion noise filtering device 1 and wind turbine
Minimum range be 30mm~200mm.The minimum range of the projected area and water conservancy diversion noise filtering device 1 and wind turbine in tapering 113
It is obtained by lot of experimental data, ensures noise reduction again while above-mentioned parameter can ensure that air-flow enters wind turbine.
The deflector 11 of stating of the present embodiment is set as multiple, is respectively defined as the first deflector 11 and the second deflector 11,
First deflector 11 and the second deflector 11 are assemblied in the opposite both sides of spiral case respectively.Specific deflector 11 is set as two,
It is respectively provided with first deflector 11 and second deflector 11.
There are gaps between the deflector 11 and smoke machine main body 3 of the present invention, are H by the distance definition in gap1。
It should be noted that deflector 11 of the invention could be provided as one, can also be provided with it is multiple, when deflector 11
When being assemblied in the opposite both sides of spiral case respectively, deflector 11 can be defined as to the first deflector 11 and the second deflector 11.It leads
Flowing plate 11 is that quantity can be depending on actual conditions.
The denoising device principle of the present invention is such：In limited closed space, water conservancy diversion noise is traveled in noise source
When filter device 1, noise reduction is carried out.Sound wave is usually propagated with negative direction touching water conservancy diversion noise filtering device 1, so most of
Incidence wave can and back wave interfere.In specific distance, about a quarter of noise source wavelength away from i.e. H at degree1, grain
The speed of son reaches highest.
Water conservancy diversion noise filtering device 1 carries out noise reduction using the principle of resonance, when the edge of aperture d and through-hole 111 and phase
After the edge minimum range b of adjacent through-hole 111 is determined, specific unifrequency is made an uproar with the water conservancy diversion for being already provided with target frequency in space
Sound filter device 1 forms covibration.
When resonance occurs, the sound wave of oscillation can intensely pierce into out through-hole 111 back and forth in air, and the acoustic energy of noise exists
It is converted to friction loss during this, achievees the effect that eliminate target frequency noise.
Spiral case 2 and wind turbine are typically in the relatively high environment of Reynolds number, therefore water conservancy diversion noise mistake inside the kitchen ventilator in air duct
The setting of filter device 1, which can reduce the turbulence level in whole flow field while air-flow being guided to enter both sides spiral case 2, enters wind turbine.Kitchen ventilator
Main noise source is from the air duct of spiral case 2, wind turbine and kitchen ventilator.Therefore the water conservancy diversion noise filtering device 1 of the present invention can
Can effectively guide air-flow to enter wind turbine both sides simultaneously along deflector 11 can greatly improve specific unifrequency noise or more again
Frequency noise noise reduction.
The kitchen ventilator with water conservancy diversion noise filtering device by adjusting the apertures of different through-holes 111, through-hole 111 edge with
Combination specific single-frequency of the edge minimum range or water conservancy diversion noise filtering device 1 of adjacent through-holes 111 at a distance from smoke machine main body 3
Rate noise or multi-frequency noise noise reduction.The water conservancy diversion noise filtering device 1 can keep long-term good noise reduction, the water conservancy diversion to make an uproar
Sound filter device 1, which has, to be easy to arrange, and dust, the grease on surface etc. can remove cleaning.The water conservancy diversion noise filtering device 1 has
The high advantage of low cost, reliability.The material of the water conservancy diversion noise filtering device 1 is anticorrosive, chemical resistance and non-damageable
Advantage, narrow frequency noise and broadband noise can effectively be reduced by having.
Embodiment 2.
A kind of kitchen ventilator with water conservancy diversion noise filtering device, as shown in figure 4, other characteristics are same as Example 1, difference
Be in：Water conservancy diversion noise filtering device 1 is additionally provided with sound-absorbing part 12.The thickness of sound-absorbing part 12 is defined as H2, and H2≤0.6H1.It inhales
Line 12 is assemblied in deflector 11 towards the outer surface of smoke machine main body 3, and specifically sound-absorbing part 12 is fixed on water conservancy diversion noise filtering dress
Set 1 outer surface.
There is the density and material of sound-absorbing part 12 important influence, sound wave can not have directly through the sound-absorbing part of extremely-low density
Method increases the frictional wear of acoustic energy.Under high density, noise sound wave then can be reflected away directly, can not enter water conservancy diversion noise
The hole of filter device 1.Therefore the sound-absorbing part 12 of the present invention is preferably fiber, PP cottons, polyester fiber, Carbon fibe or porous bubble
Cotton.Or sound-absorbing part 12 is porous plate.
The setting of the present embodiment sound-absorbing part 12 can increase the consume of friction, enhance noise reduction.
The denoising device principle of the present invention is such：Water conservancy diversion noise filtering device 1 can in limited closed space,
When noise source travels to water conservancy diversion noise filtering device 1, noise reduction is carried out.Sound wave is usually touching water conservancy diversion noise filtering device 1
It is propagated with negative direction, so most incidence wave can be interfered with back wave.In specific distance, about noise source wavelength
A quarter away from degree at, the speed of particle reaches highest.Because the present invention at a distance from smoke machine main body 3 is by noise filter
H1, noise source wavelength a quarter away from degree at, the noise of the wavelength can be effectively eliminated.
Water conservancy diversion noise filtering device 1 be using resonance principle carry out noise reduction, in space specific noise frequency with
Water conservancy diversion noise filtering device 1 provided with target frequency forms covibration.
When resonance occurs, the sound wave of oscillation can intensely pierce into out through-hole 111 back and forth in air, and the acoustic energy of noise exists
It is converted to friction loss during this, achievees the effect that eliminate target frequency noise.
Compared with Example 1, this implementation, which increases sound-absorbing part 12, can improve the effect of noise reduction.
Embodiment 3.
A kind of kitchen ventilator with water conservancy diversion noise filtering device, as shown in figure 5, other characteristics are same as Example 2, difference
Be in：First deflector 11 of the invention is provided with multiple, and the parallel side for being assemblied in spiral case 2 of multiple first deflectors 11.
Second deflector 11 is provided with multiple, and the parallel other side for being assemblied in spiral case 2 of multiple second deflectors 11.This specific implementation
There are two the first deflector 11 and the second deflector 11 of example are respectively set.Sound-absorbing part 12 is provided with multiple, is specifically configured to 4
A, sound-absorbing part 12 is corresponded with the first deflector 11 and the second deflector 11 respectively.Sound-absorbing part 12 is assemblied in first and leads respectively
Flowing plate 11 is towards the outer surface of smoke machine main body 3.
Sound-absorbing part 12 is assemblied in the second deflector 11 towards the outer surface of smoke machine main body 3 respectively.
It should be noted that the number of the first deflector 11 and the second deflector 11 of the invention can be respectively set to two
It is a, 2 or more arbitrary number can also be respectively set to.And the quantity of the first deflector 11 and the second deflector 11 can phase
Together, can not also be identical, specific embodiment is depending on actual conditions.
Compared with Example 2, embodiment adds the first deflector 11, the numbers of the second deflector 11 and sound-absorbing part 12
Amount, can more preferably improve the noise reduction capability of the kitchen ventilator.
Embodiment 4.
A kind of kitchen ventilator with water conservancy diversion noise filtering device, as shown in fig. 6, other characteristics are same as Example 1, difference
Be in：The deflector 11 of the present embodiment is specially metal deflector 11.Water conservancy diversion noise filtering device 1 eliminates noisy frequency range
For 100Hz~8000Hz.
It should be noted that the deflector 11 or plastics deflector 11 or alloy deflector 11 of the present invention, specifically
Depending on embodiment is with actual conditions.
The thickness of the deflector 11 of the present invention is less than 20mm, because of the blocked up weight that can increase water conservancy diversion noise filtering device 1.
The deflector 11 of the present embodiment is connected with reinforced structure 112.Specific reinforced structure 112 is reinforcing rib.
It should be noted that the one of which of reinforced structure 112 of the invention or reinforcing rib, convex closure or recessed packet,
May be a variety of arbitrary combinations, depending on specific embodiment is with actual conditions.
Compared with Example 1, the more rigid of deflector 11 is low resistance structure to the present embodiment.Low resistance structure can make
Incidence wave and back wave have out of phase under the specific distance with reflecting surface, can cancel out each other to the sound wave of noise,
To reduce the intensity of noise.The deflector 11 of the metal of the present embodiment has the advantages that high temperature resistant, durable.
Embodiment 5.
A kind of design of the kitchen ventilator with water conservancy diversion noise filtering device：
Target frequency：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,
H1=2.5mm.
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 water conservancy diversion noise filtering device：
Target frequency：100Hz.
The aperture d=2mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm of adjacent through-holes 111,
H1=50mm.
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 7.
A kind of design of the kitchen ventilator with water conservancy diversion noise filtering device：
Target frequency 1：800Hz.
The aperture d=4mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=18mm of adjacent through-holes 111,
H1=20mm.
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 of adjacent through-holes 111,
H1=20mm.
The present embodiment lists two different d and b combinations, can generate identical target frequency.
It should be noted that the present embodiment only lists the design parameter of 800Hz target frequencies, the present invention can also be directed to 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 8.
A kind of design of the kitchen ventilator with water conservancy diversion 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,
H1=2.6mm.
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 of adjacent through-holes 111,
H1=20mm.
Therefore the kitchen ventilator only can be effectively eliminated in the characteristic with the corresponding through-hole of above-mentioned two target frequency 111
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 noise of the invention that can eliminate 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 is protected to the present invention
The limitation of range, although being explained in detail to the present invention with reference to preferred embodiment, those skilled in the art should manage
Solution, can be modified or replaced equivalently 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 water conservancy diversion noise filtering device, it is characterised in that：It is provided with smoke machine main body, spiral case and spy can be reduced
The water conservancy diversion noise filtering device of order frequency noise or multi-frequency noise；
The water conservancy diversion noise filtering device and spiral case are assemblied in smoke machine body interior, and water conservancy diversion noise filtering device and spiral case respectively
Cooperation；
The water conservancy diversion noise filtering device is set as deflector；
The deflector is provided with tapering and panel body, and tapering is integrally connected to panel body, and the peak in tapering is directed toward snail
Wind wheel center inside shell.
2. the kitchen ventilator according to claim 1 with water conservancy diversion noise filtering device, it is characterised in that：The water conservancy diversion noise mistake
Multiple through-holes for eliminating specific unifrequency noise or multi-frequency noise are distributed in filter device；
Edge minimum range by adjusting the aperture of different through-holes, the edge of through-hole and adjacent through-holes or water conservancy diversion noise filtering
Combination of the device at a distance from smoke machine main body reaches specific unifrequency noise or multi-frequency noise noise reduction.
3. the kitchen ventilator according to claim 2 with water conservancy diversion noise filtering device, it is characterised in that：The aperture of the through-hole
It is defined as d, and d≤30mm；
The value of the d is multiple.
4. the kitchen ventilator according to claim 3 with water conservancy diversion noise filtering device, it is characterised in that：The edge of the through-hole
Minimum range between the edge of adjacent through-holes is b, and b is the arbitrary value more than 0；
The value of the b is multiple.
5. the kitchen ventilator according to claim 4 with water conservancy diversion noise filtering device, it is characterised in that：The projection in the tapering
Area is at least the half of spiral case air-admitting surface；
The minimum range of the water conservancy diversion noise filtering device and wind turbine is 30mm~200mm.
6. the kitchen ventilator according to claim 5 with water conservancy diversion noise filtering device, it is characterised in that：The deflector setting
Have multiple, is respectively defined as the first deflector and the second deflector, the first deflector and the second deflector are assemblied in spiral case respectively
Opposite both sides；
First deflector is provided with multiple, and the parallel side for being assemblied in spiral case of multiple first deflectors；
Second deflector is provided with multiple, and the parallel other side for being assemblied in spiral case of multiple second deflectors.
7. the kitchen ventilator according to claim 5 or 6 with water conservancy diversion noise filtering device, it is characterised in that：The deflector
There are gaps between smoke machine main body, are H by the distance definition in gap1。
8. the kitchen ventilator according to claim 6 with water conservancy diversion noise filtering device, it is characterised in that：The water conservancy diversion noise mistake
Filter device is additionally provided with sound-absorbing part, and sound-absorbing part is assemblied in deflector towards the outer surface of smoke machine main body；
The thickness of the sound-absorbing part is defined as H2, and H2≤0.6H1。
9. the kitchen ventilator according to claim 8 with water conservancy diversion noise filtering device, it is characterised in that：The sound-absorbing part setting
Have multiple, sound-absorbing part is corresponded with the first deflector and the second deflector respectively；
The sound-absorbing part is assemblied in the first deflector towards the outer surface of smoke machine main body respectively；
The sound-absorbing part is assemblied in the second deflector towards the outer surface of smoke machine main body respectively.
10. the kitchen ventilator with water conservancy diversion noise filtering device according to claim 8 or claim 9, it is characterised in that：The sound-absorbing part
For fiber, PP cottons, polyester fiber, Carbon fibe or porous foam；Or
The sound-absorbing part is porous plate；
The deflector is metal deflector, plastics deflector or alloy deflector；
The deflector is connected with reinforced structure；
The reinforced structure is convex closure, recessed packet or reinforcing rib；
The thickness of the deflector is less than 20mm；
It is 100Hz~8000Hz that the water conservancy diversion noise filtering device, which eliminates noisy frequency range,.
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| CN201810772833.8A CN108731071A (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator with water conservancy diversion noise filtering device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829032A (en) * | 2020-06-29 | 2020-10-27 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112240582A (en) * | 2020-09-15 | 2021-01-19 | 宁波方太厨具有限公司 | Fan, range hood and noise reduction method of fan |
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| CN209229815U (en) * | 2018-07-14 | 2019-08-09 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with water conservancy diversion noise filtering device |
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| CN111829032A (en) * | 2020-06-29 | 2020-10-27 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN111829032B (en) * | 2020-06-29 | 2021-12-03 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112240582A (en) * | 2020-09-15 | 2021-01-19 | 宁波方太厨具有限公司 | Fan, range hood and noise reduction method of fan |
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