CN108916942A - A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device - Google Patents
A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device Download PDFInfo
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- CN108916942A CN108916942A CN201810772852.0A CN201810772852A CN108916942A CN 108916942 A CN108916942 A CN 108916942A CN 201810772852 A CN201810772852 A CN 201810772852A CN 108916942 A CN108916942 A CN 108916942A
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- water conservancy
- conservancy diversion
- filtering device
- noise filtering
- deflector
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A kind of kitchen ventilator with autonomous channel formula 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 eliminate 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 and spiral case cooperate.The kitchen ventilator is by adjusting the specific unifrequency noise of combination or multi-frequency noise noise reduction at a distance from the apertures of different through-holes, the edge of through-hole and the edge minimum range of adjacent through-holes or water conservancy diversion noise filtering device and smoke machine main body.The water conservancy diversion 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 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 be effectively reduced narrow frequency noise and broadband noise.
Description
Technical field
The present invention relates to kitchen ventilator field, in particular to a kind of oil smoke with autonomous channel formula water conservancy diversion noise filtering device
Machine.
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.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 generate good noise reduction effect for kitchen ventilator.
Therefore, in view of the shortcomings of the prior art, provide a kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device with
It is very necessary to solve prior art deficiency.
Summary of the invention
A kind of band autonomous channel formula water conservancy diversion noise is provided it is an object of the invention to avoid the deficiencies in the prior art place
The kitchen ventilator of filter device.The kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device can reduce specific unifrequency noise
Or multi-frequency noise noise reduction.
Above-mentioned purpose of the invention is realized by following technical measures：
A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device is provided, smoke machine main body, spiral case and energy are provided with
Enough reduce the water conservancy diversion noise filtering device of specific unifrequency noise or multi-frequency noise.
The water conservancy diversion noise filtering device and spiral case are assemblied in smoke machine body interior respectively, and water conservancy diversion noise filtering device with
Spiral case cooperation.
The water conservancy diversion noise filtering device is distributed with multiple for eliminating specific unifrequency noise or multi-frequency noise
Through-hole.
The water conservancy diversion noise filtering device is provided with deflector and protrusion, and multiple through-holes are distributed in deflector, protrusion
It is integrally connected to deflector and is located at the corresponding position of through-hole.
The protrusion is provided with autonomous channel, and autonomous channel is through to through-hole from protrusion.
Preferably, above-mentioned protrusion be integrally connected to deflector toward smoke machine main body one side.
Preferably, above-mentioned autonomous channel is straight flange channel；Or
The autonomous channel is bevel edge channel.
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
The combination of distance of flow noise filter device to smoke machine main body reaches specific unifrequency noise reduction or multi-frequency noise 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 any greater than 0
Value.
Preferably, above-mentioned deflector is provided with tapering and panel body, and tapering is integrally connected to panel body, and tapering is most
High point is directed toward the wind wheel center inside spiral case.
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 blower is 30mm~200mm.
Preferably, above-mentioned water conservancy diversion noise filtering device is divided into the first deflector and the second deflector, the first deflector and
Two deflectors are assemblied in the opposite two sides of spiral case respectively.
Preferably, there are gaps between smoke machine main body respectively for above-mentioned first deflector and the second deflector, by gap
Distance definition is H1。
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 fiber, PP cotton, 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 autonomous channel formula water conservancy diversion noise filtering device of the invention, is provided with smoke machine main body, spiral case
With the water conservancy diversion noise filtering device that can eliminate noise.Water conservancy diversion noise filtering device and spiral case are assemblied in respectively in smoke machine main body
Portion, and water conservancy diversion noise filtering device and spiral case cooperate.Denoising device in the prior art can only be dropped for single target frequency
It makes an uproar.A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device of the invention by adjusting different through-holes aperture, logical
Combination of the edge in hole at a distance from the edge minimum range or water conservancy diversion noise filtering device and smoke machine main body of adjacent through-holes is special
Order frequency noise or multi-frequency noise noise reduction.The water conservancy diversion noise filtering device is able to maintain long-term good noise reduction effect, should
Water conservancy diversion noise filtering device, which has, to be easy to arrange, and dust, the grease on surface etc. can remove cleaning.The water conservancy diversion noise filtering device
Have the advantages that low cost, reliability are high.The material of the water conservancy diversion noise filtering device is anticorrosive, chemical resistance and is hardly damaged
The advantages of, while can be effectively reduced narrow frequency noise and broadband noise.
Detailed description of the invention
Using attached drawing, the present invention is further illustrated, but the content in attached drawing is not constituted to any limit of the invention
System.
Fig. 1 is a kind of range hood structure schematic diagram with autonomous channel formula water conservancy diversion noise filtering device of embodiment 1.
Fig. 2 is through-hole and protrusion schematic cross-section in Fig. 1.
Fig. 3 is the through-hole edge of one side of the deflector far from smoke machine main body and the edge most narrow spacing of adjacent through-holes in Fig. 1
From schematic diagram.
Fig. 4 is 2 through-hole of embodiment and protrusion schematic cross-section.
Fig. 5 is a kind of kitchen ventilator stereoscopic schematic diagram with autonomous channel formula water conservancy diversion noise filtering device of embodiment 3.
Fig. 6 is deflector structure schematic diagram in embodiment 4.
Fig. 1 includes into Fig. 6：
Water conservancy diversion noise filtering device 1,
Deflector 11, through-hole 111, reinforced structure 112, tapering 113, panel body 114,
Sound-absorbing part 12, protrusion 13,
Spiral case 2,
Smoke machine main body 3.
Specific embodiment
Technical solution of the present invention is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device, as shown in Figure 1-3, be provided with smoke machine main body 3,
Spiral case 2 and the water conservancy diversion noise filtering device 1 that can reduce specific unifrequency noise or multi-frequency noise.Water conservancy diversion noise filtering dress
Set 1 and spiral case 2 be assemblied in inside smoke machine main body 3 respectively, and water conservancy diversion noise filtering device 1 and spiral case 2 cooperate.
Water conservancy diversion noise filtering device 1 is distributed with multiple for eliminating the through-hole of specific unifrequency noise or multi-frequency noise
111.Water conservancy diversion noise filtering device 1 is provided with deflector 11 and protrusion 13, and multiple through-holes 111 are distributed in deflector 11, protrusion
Portion 13 is integrally connected to deflector 11 and is located at the corresponding position of through-hole 111.
Protrusion 13 is provided with autonomous channel, and autonomous channel is through to through-hole 111 from protrusion 13.Protrusion 13 integrally connects
Be connected to deflector 11 toward smoke machine main body 3 one side.
Experiments verify that the autonomous channel of the corresponding protrusion 13 of through-hole 111 of the invention, autonomous channel is that semi-open-type is empty
Between, water conservancy diversion noise filtering device 1 different incidence angles noise acoustic wave form at resonant frequency be it is the same, in other words water conservancy diversion is made an uproar
The target frequency of sound filter device 1 is constant.Simultaneously again because the setting of protrusion 13 increases water conservancy diversion noise filtering device 1
Whole rigidity, water conservancy diversion noise filtering device 1 are low resistance structure.
The autonomous channel of the present embodiment is straight flange channel.It should be noted that autonomous channel of the invention can be logical for straight flange
Road, or bevel edge channel specific embodiment according to the actual situation depending on.
The present invention is minimum by adjusting the edge in the aperture of different through-holes 111, the edge of through-hole 111 and adjacent through-holes 111
The specific unifrequency noise of combination or multi-frequency noise of distance or water conservancy diversion noise filtering device 1 at a distance from smoke machine main body 3
Noise reduction.
The aperture of through-hole 111 of the 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 greater than 0, and wherein the value of b is 2.The kitchen ventilator of the present embodiment
For the kitchen ventilator for eliminating multi-frequency noise.
In the constant situation of aperture d, the value of the edge minimum range b at the edge and adjacent through-holes 111 of through-hole 111 is smaller to disappear
The target noise frequency removed is bigger.Under the edge of through-hole 111 and the constant situation of 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 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
Value and the number of value of d, size according to the actual situation depending on.
Water conservancy diversion noise filtering device 1 is set as deflector 11, and the through-hole 111 is distributed in deflector 11.Deflector 11 is set
It is equipped with tapering 113 and panel body 114, tapering 113 is integrally connected to panel body 114, and spiral case is directed toward in the highest point in tapering 113
Wind wheel center inside 2.
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 blower
Minimum range be 30mm~200mm.The projected area in tapering 113 and the minimum range of water conservancy diversion noise filtering device 1 and blower
It is obtained by lot of experimental data, guarantees noise reduction effect again while above-mentioned parameter can guarantee that air-flow enters blower.
Water conservancy diversion noise filtering device 1 of the invention divides for the first deflector 11 and the second deflector 11.First deflector 11
It is assemblied in the opposite two sides of spiral case 2 respectively with the second deflector 11.
There are gaps between water conservancy diversion noise filtering device 1 of the invention and smoke machine main body 3, are by the distance definition in gap
H1。
Denoising device principle of the 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 opposite 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 degree at, particle
Speed 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 resonate occur when, the sound wave of oscillation can intensely pierce into out through-hole 111 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.
Spiral case 2 and blower are typically in the relatively high environment of Reynolds number, therefore water conservancy diversion noise mistake in air duct inside the kitchen ventilator
The setting of filter device 1 can reduce the turbulence level in whole flow field while air-flow being guided to enter two sides spiral case 2 into blower.Kitchen ventilator
Main noise source is the air duct from spiral case 2, blower and kitchen ventilator.Therefore water conservancy diversion noise filtering device 1 of the invention can
Can effectively guide air-flow to enter blower two sides simultaneously along deflector 11 can greatly improve specific unifrequency noise or more again
Frequency noise noise reduction.
Aperture of the kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device by adjusting different through-holes 111, through-hole
111 edge is at a distance from the edge minimum range or water conservancy diversion noise filtering device 1 and smoke machine main body 3 of adjacent through-holes 111
Combine specific unifrequency noise or multi-frequency noise noise reduction.The water conservancy diversion noise filtering device 1 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 water conservancy diversion noise
Filter device 1 has the advantages that low cost, reliability are high.The material of the water conservancy diversion noise filtering device 1 is anticorrosive, chemical resistance
The advantages of with being hardly damaged, having can be effectively reduced narrow frequency noise and broadband noise.
Embodiment 2.
A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device, as shown in figure 4, other characteristics and embodiment 1
It is identical, the difference is that：The autonomous channel of the present embodiment is bevel edge channel, and b and the d difference of the through-hole 111 of the present embodiment are only
There is a single value, the kitchen ventilator of the present embodiment is the kitchen ventilator for reducing specific unifrequency noise.
The kitchen ventilator of the present embodiment compared with Example 1, to the excellent noise reduction effect of specific unifrequency noise.This implementation simultaneously
The bevel edge channel of example is easily achieved in actual production technique.
Embodiment 3.
A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device, as shown in figure 5, other characteristics and embodiment 1
It is identical, the difference is that：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.Sound-absorbing part 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
The outer surface of noise filtering device 1.
The density and material of sound-absorbing part 12 have important influence, and sound wave can not have directly through the sound-absorbing part of extremely-low density
The frictional wear of method increase sound 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 sound-absorbing part 12 of the invention is preferably fiber, PP cotton, 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 effect.
Denoising device principle of the 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 opposite 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 resonate occur when, the sound wave of oscillation can intensely pierce into out through-hole 111 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.
Compared with Example 1, this implementation, which increases sound-absorbing part 12, can improve the effect of noise reduction.
Embodiment 4.
A kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device, as shown in fig. 6, other characteristics and embodiment 1
It is identical, the difference is that：The deflector 11 of the present embodiment is specially metal deflector 11.Water conservancy diversion noise filtering device 1 is eliminated
Noisy frequency range is 100Hz~8000Hz.
It should be noted that deflector 11 of the invention or plastics deflector 11 or alloy deflector 11, specifically
Depending on embodiment is with actual conditions.
The thickness of deflector 11 of the invention is less than 20mm, because of the blocked up weight that will 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,
It may be a variety of any combination, 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, so that the sound wave of noise can cancel out each other,
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 autonomous channel formula 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 autonomous channel formula 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 autonomous channel formula 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 combination, can produce identical target frequency.
It should be noted that the present embodiment only lists the design parameter of 800Hz target frequency, the present invention can also be for not
With unifrequent noise, target frequency is obtained by different parameter regulations, identical target frequency also can be by other parameter tune
Section combination obtains identical effect.
Embodiment 8.
A kind of design of the kitchen ventilator with autonomous channel formula 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 111 of above-mentioned two target frequency
The noise of corresponding frequency.
It should be noted that the present embodiment only lists the design parameter of two target frequencies, table can not only for the present invention
For the noise of two kinds of frequencies, only corresponding different parameter, the present invention can eliminate the noise of multi-frequency, reach wideband frequency drop
It makes an uproar purpose.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should be managed
Solution, can be with modifying or equivalently replacing the technical solution of the present invention, without departing from the essence and model of technical solution of the present invention
It encloses.
Claims (10)
1. a kind of kitchen ventilator with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is provided with smoke machine main body, spiral case
With the water conservancy diversion noise filtering device that can reduce specific unifrequency 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 distributed with multiple for eliminating the through-hole of specific unifrequency noise or multi-frequency noise；
The water conservancy diversion noise filtering device is provided with deflector and protrusion, and multiple through-holes are distributed in deflector, protrusion one
It is connected to deflector and is located at the corresponding position of through-hole；
The protrusion is provided with autonomous channel, and autonomous channel is through to through-hole from protrusion.
2. the kitchen ventilator according to claim 1 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
Protrusion is integrally connected to deflector toward the one side of smoke machine main body.
3. the kitchen ventilator according to claim 2 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
Autonomous channel is straight flange channel；Or
The autonomous channel is bevel edge channel；
By adjusting the edge minimum range or water conservancy diversion noise filtering in the aperture of different through-holes, the edge of through-hole and adjacent through-holes
The combination of distance of device to smoke machine main body reaches specific unifrequency noise reduction or multi-frequency noise noise reduction.
4. the kitchen ventilator according to claim 3 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
The aperture of through-hole is defined as d, and d≤30mm；
Minimum range between the edge of the through-hole and the edge of adjacent through-holes is b, and b is the arbitrary value greater than 0.
5. the kitchen ventilator according to claim 4 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
Deflector is provided with tapering and panel body, and tapering is integrally connected to panel body, and the highest point in tapering is directed toward inside spiral case
Wind wheel center；
The projected area in the tapering is at least the half of spiral case air-admitting surface；
The minimum range of the water conservancy diversion noise filtering device and blower is 30mm~200mm；
The water conservancy diversion noise filtering device is divided into the first deflector and the second deflector, the first deflector and the second deflector difference
It is assemblied in the opposite two sides of spiral case.
6. the kitchen ventilator according to claim 5 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
There are gaps between smoke machine main body respectively for first deflector and the second deflector, are H by the distance definition in gap1。
7. the kitchen ventilator according to claim 6 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
Water conservancy diversion noise filtering 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.
8. the kitchen ventilator according to claim 7 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
The thickness of sound-absorbing part is defined as H2, and H2≤0.6H1。
9. the kitchen ventilator according to claim 8 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：It is described
Sound-absorbing part is fiber, PP cotton, polyester fiber, Carbon fibe or porous foam；Or
The sound-absorbing part is porous plate.
10. the kitchen ventilator according to claim 9 with autonomous channel formula water conservancy diversion noise filtering device, it is characterised in that：Institute
Stating 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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| CN106871204A (en) * | 2017-03-31 | 2017-06-20 | 广东美的厨房电器制造有限公司 | Range hood |
| CN107726396A (en) * | 2017-10-27 | 2018-02-23 | 杭州老板电器股份有限公司 | A kind of range hood of rectifying noise-reduction |
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Application publication date: 20181130 |