CN209622882U - A kind of kitchen ventilator of the embedded noise interference device of band - Google Patents
A kind of kitchen ventilator of the embedded noise interference device of band Download PDFInfo
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- CN209622882U CN209622882U CN201821969334.XU CN201821969334U CN209622882U CN 209622882 U CN209622882 U CN 209622882U CN 201821969334 U CN201821969334 U CN 201821969334U CN 209622882 U CN209622882 U CN 209622882U
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Abstract
A kind of kitchen ventilator of the embedded noise interference device of band, is provided with smoke machine main body and the embedded noise interference device for reducing multi-frequency noise, embedded noise interference device is assemblied in smoke machine main body.Embedded noise interference device is internally provided with noise interference channel.The utility model reaches the noise reduction of specific multi-frequency noise by adjusting the shortest distance of the area of two openings in noise interference channel, the entire length in noise interference channel or two openings.The kitchen ventilator is able to maintain long-term good noise reduction effect, which has the advantages that low cost, reliability are high.The embedded noise interference device is the resonance amplitude and phase through specific noise frequency, interferes with the noise transmitted in main air duct pipe and reaches the noise reduction of specific multi-frequency noise to lower the amplitude of this noise frequency and reduced.The material of the embedded noise interference device is anticorrosive, resist chemical and is hardly damaged.
Description
Technical field
The utility model relates to kitchen ventilator field, in particular to the kitchen ventilator of a kind of embedded noise interference device of band.
Background technique
It is chronically in the environment of high noisy, the hearing of people is often damaged, and can also be made in the environment of having noise for a long time
At user emotion problem.As people's quality of the life improves, people are also lower and lower to the tolerance of noise.Therefore kitchen ventilator
Noise reduction is also got more and more attention.
Kitchen ventilator noise reduction in the prior art is mostly the reduction that noise is realized by active noise reduction and passive noise reduction mode.
Active noise reduction mode can only act on noise of the frequency within 1000Hz, can only be by passive for the noise greater than 1000Hz
Noise reduction technology processing.However passive noise reduction is mainly by being wrapped in noise source or pipeline with acoustical cotton.But exist following several
A disadvantage: one, air pressure consume is excessive, and noise and fluid are needed across acoustical cotton, and sound can be consumed using friction, reach drop
The effect made an uproar, but air performance is reduced simultaneously.Two, it is difficult to select suitable acoustical cotton, seldom supplying factory can mention
For acoustical cotton can acoustic absorptivity at different frequencies data, therefore the manufacturing enterprise of kitchen ventilator can only continuously attempt to and mistake
In find out type or thickness of suitable acoustical cotton etc..Three, the noise reduction frequency of acoustical cotton is uncontrollable, for universal acoustical cotton
Maximum noise reduction effect cannot be reached under specified narrow frequency, different strategies can not be collocated with each other from design also to carry out more
Effective noise reduction.
Therefore in view of the shortcomings of the prior art, providing a kind of kitchen ventilator of embedded noise interference device of band to solve existing skill
Art deficiency is very necessary.
Utility model content
The purpose of this utility model is that providing a kind of embedded noise interference of band in place of avoiding the deficiencies in the prior art
The kitchen ventilator of device.The oil smoke function with embedded noise interference device reduces specific multi-frequency noise.
The above-mentioned purpose of the utility model is realized by following technical measures:
A kind of kitchen ventilator of embedded noise interference device of band is provided, smoke machine main body is provided with and makes an uproar for reducing multi-frequency
The embedded noise interference device of sound, embedded noise interference device are assemblied in smoke machine main body.
The embedded noise interference device is internally provided with noise interference channel, and there are two open the setting of noise interference channel
Mouthful, two openings are connected to respectively from the main air duct of smoke machine main body and the horizontal position of two openings is different.
Preferably, above-mentioned embedded noise interference device is structure as a whole or separable assembled structure.
Preferably, above-mentioned embedded noise interference device is the wall surface of main air duct；Or
The embedded noise interference device is assemblied in the wall surface of main air duct.
K will be defined as close to the opening of main air duct air inlet1, K1Area be defined as M1, close to opening for main air duct air outlet
Mouth is defined as K2, K2Area be defined as M2。
The noise interference channel of the utility model is by adjusting two areas being open, the entire length in noise interference channel
Or the shortest distance of two openings reaches the noise reduction of specific multi-frequency noise.
Preferably, above-mentioned K1Midpoint and K2Midpoint line and main air hose axis parallel.
It is another preferred, above-mentioned K1Midpoint and K2Midpoint line and main air hose central axes at included angle A, and 0 ° of < A
≤60°。
Preferably, the area of the air inlet of above-mentioned main air duct is defined as K3, K3Area be defined as M3。
Preferably, the area of the air outlet of above-mentioned main air duct is defined as K4, K4Area be defined as M4。
Preferably, above-mentioned M1=M2。
Preferably, above-mentioned M3=M4。
Preferably, above-mentioned noise interference channel is provided with a plurality of.
Preferably, above-mentioned smoke machine main body is additionally provided with noise filtering device, and noise filtering device is assemblied in the interior of main air duct
Surface.
Preferably, above-mentioned noise filtering device is set as being distributed with multiple for eliminating the face of the through-hole of multi-frequency noise
Plate.
Preferably, the aperture of above-mentioned through-hole is defined as d, and d≤30mm.
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 d is multiple.
Preferably, the value of above-mentioned b is multiple.
Preferably, above-mentioned noise filtering device is by adjusting the aperture of different through-holes or the edge of through-hole and adjacent through-holes
Edge minimum range or noise filtering device reach specific unifrequency noise or multi-frequency noise at a distance from smoke machine main body
Noise reduction.
A kind of kitchen ventilator of the embedded noise interference device of the band of the utility model, be provided with smoke machine main body and for reducing
The embedded noise interference device of multi-frequency noise, embedded noise interference device are assemblied in smoke machine main body；It is described embedded to make an uproar
Acoustic interference device is internally provided with noise interference channel, the setting of noise interference channel there are two opening, two openings respectively with cigarette
The main air duct of owner's body is connected to and the horizontal position of two openings is different.The utility model is by adjusting the two of noise interference channel
The shortest distance of the area of a opening, the entire length in noise interference channel or two openings reaches specific multi-frequency noise
Noise reduction.The kitchen ventilator is able to maintain long-term good noise reduction effect, which has low cost, reliability high
The advantages of.The embedded noise interference device is the resonance amplitude and phase through specific noise frequency, and is passed in main air duct pipe
The noise passed, which is interfered, to be reached the noise reduction of specific multi-frequency noise to lower the amplitude of this noise frequency and is reduced.It should
The material of embedded noise interference device is anticorrosive, resist chemical and is hardly damaged.
Detailed description of the invention
The utility model is further described using attached drawing, but the content in attached drawing is not constituted to the utility model
Any restrictions.
Fig. 1 is the structural schematic diagram of embedded the noise interference device and main air duct of embodiment 1.
Fig. 2 is the embedded noise interference apparatus structure schematic diagram of Fig. 1.
Fig. 3 is K1Midpoint and K2Midpoint line and main air hose axis parallel when schematic diagram.
Fig. 4 is the embedded noise interference apparatus structure schematic diagram of embodiment 2.
Fig. 5 is the embedded noise interference apparatus structure schematic diagram of embodiment 2.
Fig. 6 is the structural schematic diagram of embedded the noise interference device and main air duct of embodiment 3.
Fig. 7 is the structural schematic diagram of embedded the noise interference device and main air duct of embodiment 4.
Fig. 8 is the K of embodiment 51Midpoint and K2Midpoint line and main air hose central axes at angle when signal
Figure.
Fig. 9 is the embedded noise interference apparatus structure schematic diagram of embodiment 6.
Figure 10 is the diagrammatic cross-section that Fig. 9 is arrow direction.
Figure 11 is the structural schematic diagram of the embedded noise interference device of embodiment 7, main air duct and noise filtering device.
Figure 12 is the structural schematic diagram of noise filtering device in Figure 11.
Figure 13 is the edge minimum range relation schematic diagram at the edge and adjacent through-holes of through-hole aperture and through-hole in Figure 12.
Fig. 1 includes into Figure 13:
Embedded noise interference device 1, noise interference channel 11,
Main air duct 2,
Noise filtering device 3, through-hole 31.
Specific embodiment
The technical solution of the utility model is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator of the embedded noise interference device of band is provided with smoke machine main body and for dropping as shown in Figures 1 to 3
The embedded noise interference device 1 of low multi-frequency noise, embedded noise interference device 1 are assemblied in smoke machine main body.
Embedded noise interference device 1 is internally provided with noise interference channel 11, and there are two the settings of noise interference channel 11
Opening, two openings are connected to respectively from the main air duct 2 of smoke machine main body and the horizontal position of two openings is different.
The embedded noise interference device 1 of the utility model is structure as a whole or separable assembled structure.The present embodiment
Embedded noise interference device 1 is structure as a whole, and it is logical that the embedded noise interference device 1 of integral structure can be improved noise interference
The leakproofness in road 11 reduces sound wave in embedded 1 internal energy loss of noise interference device, while increasing because connecting component reduces
Noise interference device reliability is added.
It should be noted that the embedded noise interference device 1 of the utility model can be structure as a whole, or seperated
Package assembly, specific form according to the actual situation depending on.
The embedded noise interference device 1 of the utility model is assemblied in the wall surface of main air duct 2.It should be noted that embedded make an uproar
Acoustic interference device 1 is assemblied in the wall surface of main air duct 2, and embedded noise interference device 1 may be the wall surface of main air duct 2, specifically
Embodiment according to the actual situation depending on.
K will be defined as close to the opening of 2 air inlet of main air duct1, K1Area be defined as M1, close to 2 air outlet of main air duct
Opening is defined as K2, K2Area be defined as M2。
The noise interference channel 11 of the utility model is by adjusting two areas being open, the entirety in noise interference channel 11
The shortest distance of length or two openings reaches the noise reduction of specific multi-frequency noise.
The utility model is preferably K1Midpoint and K2Midpoint line and main air hose axis parallel.It should be noted
It is that the utility model may be K1Midpoint and K2Midpoint line and main air hose central axes at included angle A, and 0 ° of < A≤
60°.Through lot of experiment validation, work as K1Midpoint and K2Midpoint line and main air hose axis parallel when, noise reduction effect is most
It is good.
The area of the air inlet of the main air duct 2 of the utility model is defined as K3, K3Area be defined as M3；Main air duct 2 goes out
The area in air port is defined as K4, K4Area be defined as M4.The noise reduction effect and main air duct 2 of embedded noise interference device 1 and point
Branch diameter has great relationship.The utility model is preferably M1=M2, M3=M4, can also be with M1≠M2, M3≠M4.Because in phase
Same cross-sectional area, i.e. M3=M4When, in M2Even if the region of lower section can reach good noise reduction effect in embedded noise interference
The resonance phase that is formed in device 1 and amplitude some deviations, with this condition, broadband noise frequency can be effectively reduced in this.
In M3>M4When, in M2The noise reduction effect in the region of lower section is confined to specific narrow frequency noise, and noise reduction effect can poor one
A bit.This is because as long as the acoustic phase and amplitude of the resonance of embedded noise interference device 1 have slight deviations will be to sound wave
Transmitting loss has significant change.In equal cross-sectional area M3=M4Under equal proportion, the transmitting of embedded noise interference device 1
Loss is Δ L/LaFunction.Wherein LaFor the length in noise interference channel, Δ L is two openings in same noise interference channel
The shortest distance.
The principles of the present invention are as follows: embedded noise interference device 1 (Herschel-Quincke pipe) is according to sound
Interference between wave achievees the effect that reduce sound.Embedded noise interference device 1 is according to the resonance and interference between sound wave
Achieve the effect that reduce sound.Because embedded noise interference device 1 has multiple resonant frequencies: f0,1、f0,2、fs1And fs2.Oil
The broadband noise waves that smoke machine generates are propagated in main air duct 2, and when encountering noise interference device, broadband noise waves are divided into first
Frequency noise wave and second of having a lot of social connections is had a lot of social connections frequency noise wave, and the continuation of first via broadband noise waves is propagated in main air duct 2；Second
Frequency noise wave of having a lot of social connections enters embedded noise interference device 1 and to resonate with embedded noise interference device 1, and from embedding
One of them of formula noise interference device 1, which is open out, imports main air duct 2.When the second frequency noise wave of having a lot of social connections has and f0,1、
f0,2、fs1And fs2When same or similar frequency, the second frequency noise wave of having a lot of social connections enters noise interference device 1 and makes an uproar with embedded
Acoustic interference device 1 resonates, and one of them from embedded noise interference device 1 is open out and imports main air duct.From interior
The first via broadband noise waves that embedded noise interference device 1 propagates from propagated after importing main air duct 2 with main air duct 2 the
Two have a lot of social connections frequency noise wave there are phase difference, and first via broadband noise waves and the second frequency noise wave of having a lot of social connections interfere to be formed
Interfere broadband noise waves, interference broadband noise waves weaken relative to the amplitude of broadband noise waves, noise reduces.
The length L of the basic frequency of 11 target noise reduction of noise interference channel and velocity of sound c, noise interference channel 11aAnd noise
Interfere the K in channel 111And K2Shortest distance Δ L functional dependence reciprocal, such as following formula:
Wherein f is the basic frequency of 11 target noise reduction of noise interference channel, and F is function representation symbol.
Expression in above formula are as follows:And N=(2p+1)/2, wherein N is subfrequency multiple,
P is arbitrary integer.
So the basic frequency of target noise reduction frequency is expressed as f0,1And f0,2, subfrequency fs1And fs2It can indicate
Are as follows:
fs1=[3f0,1,5f0,1,...........,xf0,1],
fs2=[2f0,2,3f0,2,...........,yf0,2],
Wherein ∞ >=x >=2m+1, m=1,2,3....., ∞, wherein ∞ >=y >=2, because, the utility model noise interference
Channel 11 can form two basic frequencies and multiple harmonic frequencies so as to mutually relate to multi-frequency noise, reach the mesh of wideband noise reduction
's.
The kitchen ventilator with embedded noise interference device, is provided with smoke machine main body and for reducing in multi-frequency noise
Embedded noise interference device 1, embedded noise interference device 1 are assemblied in smoke machine main body.In the embedded noise interference device 1
Portion is provided with noise interference channel 11, the setting of noise interference channel 11 there are two opening, two openings respectively with smoke machine main body
The horizontal position of the connection of main air duct 2 and two openings is different.The utility model is opened by adjusting two of noise interference channel 11
The shortest distances of the area of mouth, the entire length in noise interference channel 11 or two openings reach the drop of specific multi-frequency noise
It makes an uproar.The kitchen ventilator is able to maintain long-term good noise reduction effect, which has low cost, reliability high
The advantages of.The embedded noise interference device 1 is the resonance amplitude and phase through specific noise frequency, is managed with main air duct 2 interior
The noise of transmitting, which is interfered, to be reached the noise reduction of specific multi-frequency noise to lower the amplitude of this noise frequency and is reduced.
The material of the embedded noise interference device 1 is anticorrosive, resist chemical and is hardly damaged.
Embodiment 2.
A kind of kitchen ventilator of the embedded noise interference device of band, as shown in Figures 4 and 5, other features are same as Example 1,
The difference is that the 1 separable assembled structure of embedded noise interference device of the present embodiment.
Compared with Example 1, the embedded noise interference device 1 of the separable assembled structure of the present embodiment has easy to process
The advantages of with using the later period to clean.
Embodiment 3.
A kind of kitchen ventilator of the embedded noise interference device of band, as shown in fig. 6, other features are same as Example 1, it is different
Place is that the embedded noise interference device 1 of the present embodiment is the wall surface of main air duct 2.
Compared with Example 1, embedded noise interference device 1 is directly processed into main air duct 2, can be by 2 He of main air duct
Embedded noise interference device 1 is combined into one, while reducing exposed volume, keeps integral product appearance more succinct, and one is tied
The noise interference device of structure is technique assembles, production fit on is simpler, more saves the time.
Embodiment 4.
A kind of kitchen ventilator of the embedded noise interference device of band, as shown in fig. 7, other features are same as Example 1, it is different
Place is that the embedded noise interference device 1 of the present embodiment is the wall surface of main air duct 2, and embedded noise interference device 1 is
Separable assembled structure.
Compared with Example 1, embedded noise interference device 1 is directly processed into main air duct 2, can be by 2 He of main air duct
Embedded noise interference device 1 is combined into one, while reducing exposed volume, keeps integral product appearance more succinct, and seperated group
Assembling structure makes more easily to process.
Embodiment 5.
A kind of kitchen ventilator of the embedded noise interference device of band, as shown in figure 8, other features are same as Example 1, it is different
Place is, the K of the present embodiment1Midpoint and K2Midpoint line and main air hose central axes at included angle A, and 0 ° of < A≤
60°.Specific included angle A is 45 °.
It should be noted that the included angle A of the utility model can be 45 °, or greater than 0 ° to 60 ° within random angle
Degree, specific angle according to the actual situation depending on.
Compared with Example 1, K1Midpoint and K2Midpoint line and main air hose central axes at angle, can be improved
Fitness of the embedded noise interference device 1 to 2 shape of main air duct.Embedded make an uproar also can be set to non-straight-through main air duct 2
Acoustic interference device 1.
Embodiment 6.
A kind of kitchen ventilator of the embedded noise interference device of band, as shown in Figures 9 and 10, other features are same as Example 1,
The difference is that the noise interference channel 11 of the present embodiment is provided with a plurality of, specific noise interference channel 11 is provided with 4
Item.
It should be noted that the noise interference channel 11 of the utility model can be 4,1 arbitrary number can also be greater than,
Depending on specific implementation according to the actual situation.
A plurality of noise interference channel 11 can increase noise reduction effect compared to the examples,.
Embodiment 7.
A kind of kitchen ventilator of the embedded noise interference device of band, as shown in Figure 11 to 13, other features and 1 phase of embodiment
Together, the difference is that, the smoke machine main body of the utility model is additionally provided with noise filtering device 3, and noise filtering device 3 is assemblied in
The inner surface of main air duct 2.
Noise filtering device 3 is set as being distributed with multiple for eliminating the panel of the through-hole 31 of multi-frequency noise.
The aperture of through-hole 31 is defined as d, and d≤30mm.The value of d is multiple.
The edge of through-hole 31 and the edge minimum range of adjacent through-holes 31 are b, and b is the arbitrary value greater than 0.The value of b is more
It is a.
In the constant situation of aperture d, the smaller elimination of value of the edge minimum range b at the edge and adjacent through-holes 31 of through-hole 31
Target noise frequency it is bigger.Under the edge of through-hole 31 and the constant situation of edge minimum range b of adjacent through-holes 31, aperture
The smaller target noise frequency to be eliminated of the value of d is with regard to smaller.
It should be noted that when the value of value and d for b is unique, it can be 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.
The utility model is by adjusting the aperture of different through-holes 31 or the edge at the edge of through-hole 31 and adjacent through-holes 31
Minimum range or noise filtering device 3 reach the drop of specific unifrequency noise or multi-frequency noise at a distance from smoke machine main body
It makes an uproar.
The denoising device principle of the utility model is such that noise filtering device 3 can be in limited closed main air duct 2
It is interior, when noise source travels to noise filtering device 3, carry out noise reduction.Sound wave is usually touching noise filtering device 3 with negative side
To propagation, so most incidence wave can be interfered with back wave.Noise filtering device 3 is carried out using the principle of resonance
Noise reduction, the noise filtering device 3 of specific noise frequency and the target frequency of setting in space form covibration.Work as resonance
When generation, the sound wave of oscillation can intensely pierce into out through-hole 31 back and forth in air, and the sound of noise can be converted in the process
At friction loss, achieve the effect that eliminate target frequency noise.
The kitchen ventilator of the utility model can by adjusting different through-holes 31 aperture or through-hole 31 edge with it is adjacent
The edge minimum range or noise filtering device 3 of through-hole 31 reach specific unifrequency noise or multifrequency at a distance from smoke machine main body
The noise reduction purpose of rate noise.
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 (9)
1. a kind of kitchen ventilator of the embedded noise interference device of band, it is characterised in that: it is provided with smoke machine main body and for reducing more
The embedded noise interference device of frequency noise, embedded noise interference device are assemblied in smoke machine main body；
The embedded noise interference device is internally provided with noise interference channel, opening that there are two the settings of noise interference channel,
Two openings are connected to respectively from the main air duct of smoke machine main body and the horizontal position of two openings is different.
2. the kitchen ventilator of the embedded noise interference device of band according to claim 1, it is characterised in that: it is described embedded to make an uproar
Acoustic interference device is structure as a whole or separable assembled structure.
3. the kitchen ventilator of the embedded noise interference device of band according to claim 2, it is characterised in that: it is described embedded to make an uproar
Acoustic interference device is the wall surface of main air duct；Or
The embedded noise interference device is assemblied in the wall surface of main air duct.
4. the kitchen ventilator of the embedded noise interference device of band according to claim 3, it is characterised in that: it will be close to main air duct
The opening of air inlet is defined as K1, K1Area be defined as M1, the opening close to main air duct air outlet is defined as K2, K2Area it is fixed
Justice is M2；
The noise interference channel is by adjusting two areas being open, the entire length in noise interference channel or two openings
The shortest distance reach the noise reduction of specific multi-frequency noise.
5. the kitchen ventilator of the embedded noise interference device of band according to claim 4, it is characterised in that: the K1Midpoint
And K2Midpoint line and main air hose axis parallel；Or
The K1Midpoint and K2Midpoint line and main air hose central axes at included angle A, and 0 ° of A≤60 ° <.
6. the kitchen ventilator of the embedded noise interference device of band according to claim 5, it is characterised in that: the main air duct
The area of air inlet is defined as K3, K3Area be defined as M3；
The area of the air outlet of the main air duct is defined as K4, K4Area be defined as M4；
The M1=M2；
The M3=M4。
7. the kitchen ventilator of the embedded noise interference device of band according to claim 6, it is characterised in that: the noise interference
Channel is provided with a plurality of.
8. according to claim 1 to the kitchen ventilator with embedded noise interference device described in 7 any one, it is characterised in that:
The smoke machine main body is additionally provided with noise filtering device, and noise filtering device is assemblied in the inner surface of main air duct；
The noise filtering device is set as being distributed with multiple for eliminating the panel of the through-hole of multi-frequency noise；
The aperture of the through-hole is defined as d, and d≤30mm；
The edge of the through-hole and the edge minimum range of adjacent through-holes are b, and b is the value greater than 0；
The value of the d is multiple；
The value of the b is multiple.
9. the kitchen ventilator of the embedded noise interference device of band according to claim 8, it is characterised in that: the noise filtering
Device fills by adjusting the edge minimum range or noise filtering of the aperture of different through-holes or the edge of through-hole and adjacent through-holes
Set the noise reduction for reaching specific unifrequency noise or multi-frequency noise at a distance from smoke machine main body.
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| CN201821969334.XU CN209622882U (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator of the embedded noise interference device of band |
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| CN201821969334.XU CN209622882U (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator of the embedded noise interference device of band |
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2018
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