CN109373402A - A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band - Google Patents
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band Download PDFInfo
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- CN109373402A CN109373402A CN201811421146.8A CN201811421146A CN109373402A CN 109373402 A CN109373402 A CN 109373402A CN 201811421146 A CN201811421146 A CN 201811421146A CN 109373402 A CN109373402 A CN 109373402A
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- noise
- noise interference
- embedded
- exhaust nozzle
- nozzle pipe
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- 230000009467 reduction Effects 0.000 claims abstract description 42
- 238000001914 filtration Methods 0.000 claims description 28
- 229920000742 Cotton Polymers 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 8
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 16
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 230000000644 propagated effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000008451 emotion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
Abstract
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, it is provided with the exhaust nozzle pipe main body for connecting range hood fan and exhaust pipe and the embedded noise interference device for reducing multi-frequency noise, embedded noise interference device is assemblied in exhaust nozzle pipe main body.The embedded noise interference device of the present invention reaches the noise reduction of specific multi-frequency noise by adjusting the shortest distance of the area of the first aperture and the second aperture, the entire length in noise interference channel or the first aperture and the second aperture.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 that the noise that transmits interferes and reaches the noise reduction of specific multi-frequency noise to lower the amplitude of this noise frequency and reduced in resonance amplitude and phase, with wind channel tube through specific noise frequency.The material of the embedded noise interference device is anticorrosive, resist chemical and is hardly damaged.
Description
Technical field
The present invention relates to kitchen ventilator field, in particular to the kitchen ventilator exhaust nozzle of a kind of embedded noise interference device of band
Pipe.
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, provide a kind of kitchen ventilator exhaust nozzle pipe of embedded noise interference device of band with
It is very necessary to solve prior art deficiency.
Summary of the invention
A kind of embedded noise interference of band is provided it is an object of the present invention to avoiding the deficiencies in the prior art place
The kitchen ventilator exhaust nozzle pipe of device.The kitchen ventilator exhaust nozzle pipe with embedded noise interference device can reduce specific multifrequency
Rate noise.
Above-mentioned purpose of the invention is realized by following technical measures:
A kind of kitchen ventilator exhaust nozzle pipe of embedded noise interference device of band is provided, is provided with for connecting lampblack absorber wind
The exhaust nozzle pipe main body of machine and exhaust pipe and embedded noise interference device for reducing multi-frequency noise, it is embedded to make an uproar
Acoustic interference device is assemblied in exhaust nozzle pipe main body.
The embedded noise interference device is internally provided with noise interference channel, and noise interference channel is provided with first
Aperture and the second aperture, noise interference channel are connected to by the first aperture and the second aperture with the air duct of exhaust nozzle pipe main body,
And first aperture and the second aperture horizontal position it 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 exhaust nozzle pipe main body.
Another preferred, above-mentioned embedded noise interference device is assemblied in the wall surface of exhaust nozzle pipe main body.
Preferably, above-mentioned embedded noise interference device is dry by adjusting the area of the first aperture and the second aperture, noise
The shortest distance of the entire length or the first aperture and the second aperture that relate to channel reaches the noise reduction of specific multi-frequency noise.
Preferably, the length in above-mentioned noise interference channel is defined as La, and 0 < La≤1000mm。
Preferably, above-mentioned K1And K2The shortest distance be defined as Δ L, and La> Δ L > 5mm.
First aperture is defined as K1, K1Area be defined as M1, the second aperture is defined as K2, K2Area be defined as M2,
The area of the air inlet in air duct is defined as K3, K3Area be defined as M3, the area of the air outlet in air duct is defined as K4, K4Area
It is defined as M4；
Preferably, above-mentioned M1=M2, M3=M4。
Preferably, the shape of the cross section in above-mentioned noise interference channel be circle, ellipse, rectangle, triangle, diamond shape or
Arbitrary shape of the person in addition to above-mentioned shape.
Preferably, above-mentioned noise interference channel is provided with a plurality of.
Preferably, above-mentioned exhaust nozzle pipe main body is provided with noise filtering device, and noise filtering device is assemblied in air duct
Inner 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 multifrequency at a distance from exhaust nozzle pipe main body
The noise reduction of rate noise.
Preferably, there are gaps between above-mentioned noise filtering device and the inner surface in air duct, are by the distance definition in gap
H1。
Preferably, above-mentioned exhaust nozzle pipe main body is additionally provided with sound-absorbing part, and sound-absorbing part fixing assembling is in gap.
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.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band of the invention, is provided with for connecting oil smoke
The exhaust nozzle pipe main body of machine blower and exhaust pipe for reducing multi-frequency noise embedded noise interference device, it is embedded to make an uproar
Acoustic interference device is assemblied in exhaust nozzle pipe main body；The noise interference that is internally provided with of the embedded noise interference device leads to
Road, noise interference channel are provided with the first aperture and the second aperture, noise interference channel by the first aperture and the second aperture with
The air duct of exhaust nozzle pipe main body is connected to, and the first aperture is different with the horizontal position of the second aperture.The embedded noise of the present invention
Interference device by adjusting the area of the first aperture and the second aperture, the entire length in noise interference channel or the first aperture and
The shortest distance of second aperture reaches the noise reduction of specific multi-frequency noise.The kitchen ventilator is able to maintain long-term good noise reduction effect,
The embedded noise interference device has the advantages that low cost, reliability are high.The embedded noise interference device is through specific
The noise transmitted in the resonance amplitude and phase, with wind channel tube of noise frequency is interfered to lower the amplitude of this noise frequency,
The noise reduction for reaching specific multi-frequency noise is reduced.The material of the embedded noise interference device is anticorrosive, anti-chemistry
Corrode and is hardly damaged.
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 kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 1.
Fig. 2 is the embedded noise interference apparatus structure perspective view in Fig. 1.
Fig. 3 is the schematic cross-section of Fig. 1.
Fig. 4 is the length L of the embedded noise interference device of Fig. 3aWith for K1And K2Shortest distance Δ L schematic diagram.
Fig. 5 is the schematic diagram of the shape of the cross section in noise interference channel, and (1) in Fig. 5 is circle, and (2) in Fig. 5 are
Ellipse, (3) in Fig. 5 are rectangle, and (4) in Fig. 5 are triangle, and (5) in Fig. 5 are diamond shape, and (6) in Fig. 5 are any
Shape, (7) in Fig. 5 are arbitrary shape, and (8) in Fig. 5 are arbitrary shape.
Fig. 6 is a kind of kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 2.
Fig. 7 is the embedded noise interference apparatus structure schematic diagram of embodiment 3.
Fig. 8 is the arrow direction schematic cross-section of Fig. 7.
Fig. 9 is a kind of kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 4.
Figure 10 is the enlarged drawing of Z region in Fig. 9.
Figure 11 is the structural schematic diagram of noise filtering device in Fig. 9.
Figure 12 is the edge minimum range relation schematic diagram at the edge and adjacent through-holes of through-hole aperture and through-hole in Figure 11.
Figure 13 is the embedded noise interference apparatus structure schematic diagram of separable assembled structure.
Figure 14 is the embedded noise interference apparatus structure schematic diagram of separable assembled structure.
Figure 15 is a kind of kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 6.
Fig. 1 includes into Figure 15:
Embedded noise interference device 1, noise interference channel 11,
Exhaust nozzle pipe main body 2,
Noise filtering device 3, through-hole 31,
Sound-absorbing part 4,
Exhaust pipe 5.
Specific embodiment
Technical solution of the present invention is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band is provided with as shown in Fig. 1 to 5 for connecting
Connect the exhaust nozzle pipe main body 2 of range hood fan and exhaust pipe 5 and the embedded noise interference for reducing multi-frequency noise
Device 1, embedded noise interference device 1 are assemblied in exhaust nozzle pipe main body 2.
Embedded noise interference device 1 is internally provided with noise interference channel 11, and noise interference channel 11 is provided with
One aperture and the second aperture, noise interference channel 11 pass through the air duct of the first aperture and the second aperture and exhaust nozzle pipe main body 2
Connection, and the first aperture is different with the horizontal position of the second aperture.The embedded noise interference device 1 of the present embodiment can be one
Body structure.Embedded noise interference device 1 is assemblied in the wall surface of exhaust nozzle pipe main body 2.
It should be noted that embedded noise interference device 1 of the invention can be structure as a whole, or separable assembled
Structure, depending on situation is embodied according to the actual situation.Embedded noise interference device 1 of the invention can be exhaust nozzle pipe
The wall surface of main body 2, or embedded noise interference device 1 is the wall surface of exhaust nozzle pipe main body 2, and situation root is embodied
Depending on actual conditions.
Embedded noise interference device 1, which has the advantage that, is the reduction of exposed volume, keeps integral product appearance more succinct,
The embedded noise interference device 1 of integral structure is technique assembles, production fit on is simpler, more saves the time.
First aperture is defined as K1, K1Area be defined as M1, the second aperture is defined as K2, K2Area be defined as M2,
The area of the air inlet in air duct is defined as K3, K3Area be defined as M3, the area of the air outlet in air duct is defined as K4, K4Area
It is defined as M4。
Of the invention can be with M1=M2, M3=M4, can also be with M1≠M2, M3≠M4.The M of the present embodiment1=M2, M3≠M4。M3
≠M4The advantages of be the structure that exhaust nozzle pipe can be made preferably to deacclimatize external kitchen ventilator.
Embedded noise interference device 1 is by adjusting the area of the first aperture and the second aperture, noise interference channel 11
Entire length or the shortest distance of the first aperture and the second aperture reach the noise reduction of specific multi-frequency noise.Noise interference channel
11 length is defined as La, and 0 < La≤ 1000mm, the L of the present embodimentaSpecially 300mm.K1And K2The shortest distance be defined as
Δ L, and La> Δ L > 5mm, the Δ L of the present embodiment is specially 100mm.
It should be noted that the length of embedded noise interference device 1 of the invention can be 300mm, or be greater than
0, the random length less than 1000mm, depending on specific length is with actual conditions.It should be noted that K of the invention1And K2Most
Short distance can be 100mm, or be greater than 5mm, be less than LaAny distance, depending on specific distance is with actual conditions.
The cross section in noise interference channel 11 of the invention it is conveniently of circular shape, or ellipse, rectangle, three
Angular, diamond shape or the arbitrary shape in addition to above-mentioned shape, the shape of specific cross section according to the actual situation depending on.
The cross section in noise interference channel 11 of the invention is circle, as shown in (1) in Fig. 5.
The cross section in noise interference channel 11 of the invention is ellipse, as shown in (2) in Fig. 5.
The cross section in noise interference channel 11 of the invention is rectangle, as shown in (3) in Fig. 5.It should be noted that this hair
Rectangle in bright is not limited to this rectangle of (3) in Fig. 5, other rectangles also comply with the requirement of rectangle of the present invention, also at this
In the protection scope of invention.
The cross section in noise interference channel 11 of the invention is triangle, as shown in (4) in Fig. 5.
The cross section in noise interference channel 11 of the invention is diamond shape, as shown in (5) in Fig. 5.
The cross section in noise interference channel 11 of the invention is arbitrary shape, such as (6) in Fig. 5, (7) in Fig. 5 and Fig. 5
In (8) shown in.It should be noted that the arbitrary shape in the present invention is not limited to (6) in Fig. 5, in (7) and Fig. 5 in Fig. 5
(8) this 3 kinds of rectangles, other arbitrary shapes also comply with the requirement of arbitrary shape of the present invention, also in protection scope of the present invention
It is interior.
The cross section in noise interference channel 11 is round or ellipse etc. without angular shape, it is possible to reduce sound wave exists
The loss of the energy in noise interference channel 11 to improve the effect with noise source sound wave interference, and then improves the effect of noise reduction.
The principle of the present invention are as follows: embedded noise interference device 1 (Herschel-Quincke pipe) is according between sound wave
Interference achieve the effect that reduce sound.Embedded noise interference device 1 be according between sound wave resonance and interference reach drop
The effect of sound in a low voice.Because embedded noise interference device 1 has multiple resonant frequencies: f0,1、f0,2、fs1And fs2.Kitchen ventilator produces
Raw broadband noise waves are propagated in main air duct 2, and when encountering embedded noise interference device 1, broadband noise waves are divided into
Broadband noise waves and second are had a lot of social connections frequency noise wave all the way, and the continuation of first via broadband noise waves is propagated in main air duct 2；The
Two have a lot of social connections frequency noise wave into embedded noise interference device 1 and resonating with embedded noise interference device 1, and from interior
One of them of embedded noise interference device 1, which is open out, imports main air duct 2.When second have a lot of social connections frequency noise wave have with
f0,1、f0,2、fs1And fs2When same or similar frequency, second have a lot of social connections frequency noise wave into embedded noise interference device 1 simultaneously
It resonates with embedded noise interference device 1, and is led from one of them remittance that is open out of embedded noise interference device 1
Air duct.The first via broadband noise waves propagated from from embedded noise interference device 1 after importing main air duct 2 with main air duct
2 propagate second have a lot of social connections frequency noise wave there are phase difference, first via broadband noise waves and second are had a lot of social connections frequency noise wave hair
Raw interference forms interference broadband noise waves, interferes broadband noise waves to weaken relative to the amplitude of broadband noise waves, noise
It reduces.
The length L of the basic frequency of embedded 1 target noise reduction of noise interference device and velocity of sound c, noise interference channel 11aAnd
The K of embedded noise interference device 11And K2Shortest distance Δ L functional dependence reciprocal, such as following formula:
Wherein f is the basic frequency of embedded 1 target noise reduction of noise interference device, and F is function representation symbol.It is specific in above formula
Expression formula are as follows:And N=(2p+1)/2, wherein N is subfrequency multiple, and 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 embedded noise of the present invention is dry
Two basic frequencies and multiple harmonic frequencies can be formed so as to mutually relate to multi-frequency noise by relating to device 1, reach wideband noise reduction
Purpose.
The kitchen ventilator exhaust nozzle pipe with embedded noise interference device, is provided with for connecting range hood fan and row
The exhaust nozzle pipe main body 2 of tracheae 5 and embedded noise interference device 1 for reducing multi-frequency noise, embedded noise
Interference device 1 is assemblied in exhaust nozzle pipe main body 2；The noise interference that is internally provided with of the embedded noise interference device 1 leads to
Road 11, noise interference channel 11 are provided with the first aperture and the second aperture, and noise interference channel 11 passes through the first aperture and second
Aperture is connected to the air duct of exhaust nozzle pipe main body 2, and the first aperture is different with the horizontal position of the second aperture.The present invention is embedded
Formula noise interference device 1 by adjusting the area of the first aperture and the second aperture, noise interference channel 11 entire length or
The shortest distance of first aperture and the second aperture reaches the noise reduction of specific multi-frequency noise.The kitchen ventilator is able to maintain long-term good
Noise reduction effect, the embedded noise interference device 1 have the advantages that low cost, reliability are high.The embedded noise interference device 1
It is the resonance amplitude and phase through specific noise frequency, the noise for managing interior transmitting with air duct 2 is interfered to lower this noise
The amplitude of frequency, the noise reduction for reaching specific multi-frequency noise are reduced.The material of the embedded noise interference device 1 is anti-
It burn into resist chemical and is hardly damaged.
Embodiment 2.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in fig. 6, other features and embodiment
1 is identical, the difference is that, the M of the present embodiment1=M2, M3=M4。
The caliber in the noise reduction effect of embedded noise interference device 1 and air duct 2 and noise interference channel 11 has great pass
System.The present invention is preferably M1=M2, M3=M4, can also be with M1≠M2, M3≠M4.Since in identical cross-sectional area, i.e. M3=M4
When, in M2Even if the region of lower section can reach the resonance phase that good noise reduction effect is formed in embedded noise interference device 1
Position and some deviations of amplitude, 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.
Embodiment 3.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in FIG. 7 and 8, other features and reality
It is identical to apply example 1, the difference is that, the noise interference channel 11 of the present embodiment is provided with a plurality of.The present embodiment is specifically provided with 3
Noise interference channel 11.
It should be noted that noise interference channel 11 of the invention can be set to 3, appointing greater than 1 may be set to be
Anticipate positive integer, specific item number according to the actual situation depending on.
Compared with Example 1, the parameter in multiple noise interference channels 11 of the present embodiment can be the same or different.
The noise interference channel 11 for the parameter that difference is, the specific different f of the basic frequency in different noise interference channels 110,1And f0,2,
Therefore the noise of more broadband can be reduced.For the noise interference channel 11 with identical parameters, identical frequency can be improved
Noise reduction effect.Noise reduction effect can be improved in a plurality of noise interference channel 11.
Embodiment 4.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in Fig. 9 to 12, other features and reality
It is identical to apply example 1, the difference is that, exhaust nozzle pipe main body 2 of the invention is provided with noise filtering device 3, noise filtering dress
Set 3 inner surfaces for being assemblied in 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 present invention is minimum by adjusting the aperture of different through-holes 31 or the edge of through-hole 31 and the edge of adjacent through-holes 31
Distance or noise filtering device 3 reach specific unifrequency noise or multi-frequency noise at a distance from exhaust nozzle pipe main body 2
Noise reduction.
There are gaps between noise filtering device 3 of the invention and the inner surface in air duct, are H by the distance definition in gap1。
Exhaust nozzle pipe main body 2 is additionally provided with sound-absorbing part 4, and 4 fixing assembling of sound-absorbing part is in gap.The thickness of sound-absorbing part 4 is defined as H2, and
H2≤0.6H1.Sound-absorbing part 4 is fiber, PP cotton, polyester fiber, Carbon fibe or porous foam.
Denoising device principle of the invention: noise filtering device 3 can be propagated in limited closed space in noise source
When to noise filtering device 3, noise reduction is carried out.Sound wave is usually propagated with opposite direction touching noise filtering device 3, so big portion
The incidence wave divided can be interfered with back wave.In the fixed distance of the characteristic about a quarter of noise source wavelength away from being at degree
H1, the speed of particle reaches highest, because the present invention by noise filtering device 3 and the inner wall of exhaust nozzle pipe main body 2 away from
From a quarter in noise source wavelength away from degree at, the noise of the wavelength can be effectively eliminated.
The density and material of sound-absorbing part 4 also have an important influence, sound wave can directly through the sound-absorbing part 4 of extremely-low density,
The frictional wear of sound energy can not be increased；Under high density, noise sound wave then can be reflected away directly, can not enter noise mistake
Filter the through-hole 31 of device 3.Therefore sound-absorbing part 4 of the invention is preferably fiber, PP cotton, polyester fiber, Carbon fibe or porous bubble
Cotton.
The determinant of the resonant frequency of noise filtering device 3 of the invention: the aperture of through-hole 31, through-hole 31 edge with
The edge minimum range or noise filtering device 3 of adjacent through-holes 31 are being made an uproar at a distance from exhaust nozzle pipe main body 2 with through-hole 31
It whether is independent space inside sound filter device 3, just can determine that the resonant frequency of noise filtering device 3, it is specific to reach reduction
The purpose of frequency.
The present embodiment increases noise filtering device 3 and sound-absorbing part 4 compared with embodiment 1, and main purpose is target noise to be allowed
The energy of frequency can be filtered or be inhaled by noise filtering device 3 and sound-absorbing part 4 before not entering embedded noise interference device 1 also
It receives, remaining noise is eliminated through embedded noise interference device 1 again, to reach maximum noise reduction effect.
Embodiment 5.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, other features are same as Example 1, different
Place is that embedded noise interference device 1 is separable assembled structure.The embedded noise of the separable assembled structure of the present embodiment
Interference device 1 is specially form shown in Figure 13.
It should be noted that the embedded noise interference device 1 of separable assembled structure is tightly connected by sealing element, seperated group
Form shown in the embedded noise interference device 1 or Figure 14 of assembling structure, or specific arbitrary separable assembled structure,
Specific form of implementation according to the actual situation depending on.
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 6.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in figure 15, other features and implementation
Example 2 is identical, the difference is that, embedded noise interference device 1 is the wall surface of exhaust nozzle pipe main body 2.
Compared with Example 1, embedded noise interference device 1 is directly processed into exhaust nozzle pipe main body 2, can will arrange
Gas jets pipe main body 2 and embedded noise interference device 1 are combined into one, while reducing exposed volume, make integral product appearance
It is more succinct, the noise interference device of integral structure in technique assembling, production fit on is simpler, more saves the time.
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 exhaust nozzle pipe of the embedded noise interference device of band, it is characterised in that: it is provided with for connecting oil
The exhaust nozzle pipe main body of smoke machine blower and exhaust pipe and embedded noise interference device for reducing multi-frequency noise, it is interior
Embedded noise interference device is assemblied in exhaust nozzle pipe main body；
The embedded noise interference device is internally provided with noise interference channel, and noise interference channel is provided with the first aperture
With the second aperture, noise interference channel is connected to by the first aperture and the second aperture with the air duct of exhaust nozzle pipe main body, and the
One aperture is different with the horizontal position of the second aperture.
2. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 1, it is characterised in that: institute
Embedded noise interference device is stated to be structure as a whole or separable assembled structure.
3. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 2, it is characterised in that: institute
State the wall surface that embedded noise interference device is exhaust nozzle pipe main body.
4. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 2, it is characterised in that: institute
State the wall surface that embedded noise interference device is assemblied in exhaust nozzle pipe main body.
5. with the kitchen ventilator exhaust nozzle pipe of embedded noise interference device according to claim 3 or 4, feature exists
In: the embedded noise interference device is by adjusting the area of the first aperture and the second aperture, the entirety in noise interference channel
Length or the shortest distance of the first aperture and the second aperture reach the noise reduction of specific multi-frequency noise；
The length in the noise interference channel is defined as La, and 0 < La≤1000mm；
The K1And K2The shortest distance be defined as Δ L, and La> Δ L > 5mm.
6. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 5, it is characterised in that: it will
First aperture is defined as K1, K1Area be defined as M1, the second aperture is defined as K2, K2Area be defined as M2, the air inlet in air duct
The area of mouth is defined as K3, K3Area be defined as M3, the area of the air outlet in air duct is defined as K4, K4Area be defined as M4,；
The M1=M2, M3=M4。
7. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 6, it is characterised in that: institute
The shape of the cross section in noise interference channel is stated for circle, ellipse, rectangle, triangle, diamond shape or in addition to above-mentioned shape
Arbitrary shape.
8. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 7, it is characterised in that: institute
State noise interference channel be provided with it is a plurality of.
9. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 8, it is characterised in that: institute
It states exhaust nozzle pipe main body and is provided with noise filtering device, noise filtering device is assemblied in the inner surface in 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 arbitrary value greater than 0；
The value of the d is multiple；
The value of the b is multiple；
The noise filtering device is minimum by adjusting the aperture of different through-holes or the edge of through-hole and the edge of adjacent through-holes
Distance or noise filtering device reach the drop of specific unifrequency noise or multi-frequency noise at a distance from exhaust nozzle pipe main body
It makes an uproar.
10. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 9, it is characterised in that:
There are gaps between the noise filtering device and the inner surface in air duct, are H by the distance definition in gap1；
The exhaust nozzle pipe main body is additionally provided with sound-absorbing part, and sound-absorbing part fixing assembling is in gap；
The thickness of the sound-absorbing part is defined as H2, and H2≤0.6H1；
The sound-absorbing part is fiber, PP cotton, polyester fiber, Carbon fibe or porous foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421146.8A CN109373402A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811421146.8A CN109373402A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
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| CN109373402A true CN109373402A (en) | 2019-02-22 |
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| CN201811421146.8A Pending CN109373402A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
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| CN (1) | CN109373402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526267A (en) * | 2020-11-23 | 2022-05-24 | 广东美的白色家电技术创新中心有限公司 | Fan and range hood |
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