CN109373397A - A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device - Google Patents
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device Download PDFInfo
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- CN109373397A CN109373397A CN201811420920.3A CN201811420920A CN109373397A CN 109373397 A CN109373397 A CN 109373397A CN 201811420920 A CN201811420920 A CN 201811420920A CN 109373397 A CN109373397 A CN 109373397A
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- 230000009467 reduction Effects 0.000 claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims description 28
- 229920000742 Cotton Polymers 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 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 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 13
- 230000000644 propagated effect Effects 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008451 emotion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Duct Arrangements (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device, it is provided with the exhaust nozzle pipe main body for connecting blower and exhaust pipe and the self-regulation noise interference device for reducing multi-frequency noise, self-regulation noise interference device is assemblied in exhaust nozzle pipe main body.The present invention reaches the noise reduction of specific multi-frequency noise by adjusting the area of two openings of self-regulation noise interference device, the entire length for the noise interference device that is self-regulated or the shortest distance of 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 self-regulation 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 self-regulation 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 a kind of kitchen ventilator exhaust nozzle of band self-regulation noise interference device
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 band self-regulation noise interference device with
It is very necessary to solve prior art deficiency.
Summary of the invention
A kind of band self-regulation noise interference device is provided it is an object of the invention to avoid the deficiencies in the prior art place
Kitchen ventilator exhaust nozzle pipe.The kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device can reduce specific multi-frequency and make an uproar
Sound.
Above-mentioned purpose of the invention is realized by following technical measures:
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device is provided, is provided with for connecting blower and row
The exhaust nozzle pipe main body of tracheae and self-regulation noise interference device for reducing multi-frequency noise, be self-regulated noise interference
Device is assemblied in exhaust nozzle pipe main body.
Preferably, above-mentioned self-regulation noise interference device, which is provided with, can increase self-regulation noise interference device entire length
Sliding part and interference device main body, sliding part are assemblied in interference device main body, and the sliding part is along interference device main body phase negative side
To extension.
Preferably, above-mentioned sliding part is the sliding part of the hard rail structure with projectile body.
Preferably, above-mentioned sliding part is set as multiple.
Preferably, above-mentioned self-regulation noise interference device, which is provided with, can increase self-regulation noise interference device entire length
Pars contractilis and interference device main body, pars contractilis are flush-mounted in interference device main body.
Preferably, above-mentioned pars contractilis is the pars contractilis with folded structure.
Preferably, above-mentioned pars contractilis is set as multiple.
Preferably, above-mentioned self-regulation noise interference device is provided with the extension that can increase length and interference device main body,
Extension is flush-mounted in interference device main body.
Preferably, above-mentioned extension is the extension with elastic construction.
Preferably, above-mentioned extension is set as multiple.
Preferably, above-mentioned self-regulation noise interference device is provided with the deformations and interference device main body for changing diameter, shape
Change portion is assemblied in interference device main body.
The deformations are PVC deformations；Or
The deformations are rubber deformation portion；Or
The deformations are silica gel deformations；Or
The deformations are PE deformations；Or
The deformations are aluminium foil deformations；Or
The deformations are latex deformations.
Preferably, above-mentioned deformations are provided with multiple.
Preferably, the setting of above-mentioned self-regulation noise interference device is there are two opening, two openings respectively with exhaust nozzle pipe
The air duct of main body is connected to and the horizontal position of two openings is different.
K will be defined as close to the opening of air inlet of air duct1, K1Area be defined as M1, the opening close to duct outlet is fixed
Justice is K2, K2Area be defined as M2。
Preferably, the area of the air inlet in above-mentioned air duct is defined as K3, K3Area be defined as M3。
Preferably, the area of the air outlet in above-mentioned air duct is defined as K4, K4Area be defined as M4。
Preferably, above-mentioned M1=M2, M3=M4。
Preferably, above-mentioned self-regulation noise interference device is by adjusting two areas being open, self-regulation noise interference dress
The shortest distance of the entire length set or two openings reaches the noise reduction of specific multi-frequency noise.
The shortest distance for the noise interference device that is self-regulated is defined as La, collapsing length is defined as Δ x and 0 < La+Δx≤
1000mm, Δ x >=0.
Preferably, above-mentioned K1And K2The shortest distance be defined as Δ L, and La> Δ L > 5mm.
Preferably, the shape of the cross section of above-mentioned self-regulation noise interference device be circle, ellipse, rectangle, triangle,
Diamond shape or the arbitrary shape in addition to above-mentioned shape.
Preferably, above-mentioned exhaust nozzle pipe main body is additionally 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 band self-regulation noise interference device of the invention, is provided with for connecting blower
With the exhaust nozzle pipe main body of exhaust pipe and for reducing the self-regulation noise interference device of multi-frequency noise, be self-regulated noise
Interference device is assemblied in exhaust nozzle pipe main body.The present invention by adjusting two of noise interference device openings of self-regulation faces
The shortest distance of product, the entire length of self-regulation noise interference device or two openings reaches 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
Advantage.The self-regulation noise interference device is transmitted in resonance amplitude and phase, with wind channel tube through specific noise frequency
Noise, 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 self-regulated
The material of section noise interference device is anticorrosive, resist chemical 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 structural schematic diagram of the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device of embodiment 1.
Fig. 2 is the schematic cross-section of Fig. 1.
Fig. 3 is the self-regulation noise interference device reset condition structural schematic diagram in Fig. 1.
Fig. 4 is the self-regulation noise interference device retracted position structural schematic diagram of Fig. 3.
Fig. 5 is the schematic diagram of the shape of the cross section of self-regulation noise interference device, and (1) in Fig. 5 is round, in Fig. 5
(2) be ellipse, (3) in Fig. 5 are rectangle, and (4) in Fig. 5 are triangle, and (5) in Fig. 5 are diamond shape, (6) in Fig. 5
For arbitrary shape, (7) in Fig. 5 are arbitrary shape, and (8) in Fig. 5 are arbitrary shape.
Fig. 6 is a kind of structural schematic diagram of the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device of embodiment 2.
Fig. 7 is the self-regulation noise interference device reset condition structural schematic diagram of embodiment 3.
Fig. 8 is the self-regulation noise interference device retracted position structural schematic diagram of Fig. 7.
Fig. 9 is the self-regulation noise interference device reset condition structural schematic diagram of embodiment 4.
Figure 10 is the self-regulation noise interference device retracted position structural schematic diagram of Fig. 9.
Figure 11 is a kind of reset condition knot of the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device of embodiment 5
Structure schematic diagram.
Figure 12 is the self-regulation noise interference device retracted position structural schematic diagram of Figure 11.
Figure 13 is a kind of structural representation of the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device of embodiment 6
Figure.
Figure 14 is the enlarged drawing of the Z region in Figure 13.
Figure 15 is the structural schematic diagram of noise filtering device in Figure 13.
Figure 16 is the edge minimum range relation schematic diagram at the edge and adjacent through-holes of through-hole aperture and through-hole in Figure 15.
Fig. 1 includes into Figure 16:
Self-regulation noise interference device 1,
Sliding part 11, projectile body 111,
Pars contractilis 12,
Extension 13,
Interference device main body 14,
Deformations 15,
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 band self-regulation noise interference device 1 is provided with as shown in Fig. 1 to 5 for connecting
Give a dinner for a visitor from afar machine and exhaust pipe 5 exhaust nozzle pipe main body 2 and self-regulation noise interference device 1 for reducing multi-frequency noise,
Self-regulation noise interference device 1 is assemblied in exhaust nozzle pipe main body 2.
Self-regulation noise interference device 1 is provided with the sliding part 11 that can increase self-regulation 1 entire length of noise interference device
With interference device main body 14, sliding part 11 is assemblied in interference device main body 14, and the sliding part 11 is along 14 phase of interference device main body
Opposite direction extends.Sliding part 11 is the sliding part 11 of the hard rail structure with projectile body 111.The sliding part 11 of the present embodiment
It is set as one.
It should be noted that sliding part 11 of the invention can be set to one, multiple, specific implementation may be set to be
Mode according to the actual situation depending on.
When the air pressure for the noise interference device 1 that is self-regulated is greater than the stiction of self-regulation noise interference device 1, hard is sliding
The sliding part 11 of rail structure extends to 14 opposite direction of interference device main body, when the air pressure of self-regulation noise interference device 1 is less than
When the screen resilience of self-regulation noise interference device 1, the sliding part 11 of hard rail structure is shunk.Hard rail structure of the invention
Sliding part 11 specific structure be common knowledge, those skilled in the art should know, be not repeated herein.
The noise interference device 1 that is self-regulated is arranged there are two opening, two air ducts with exhaust nozzle pipe main body 2 respectively that are open
The horizontal position of connection and two openings is different.K will be defined as close to the opening of air inlet of air duct1, K1Area be defined as M1,
Opening close to duct outlet is defined as K2, K2Area be defined as M2.The air inlet and kitchen ventilator of exhaust nozzle pipe of the present invention
The connection of blower (attached drawing is not shown) air outlet, the air outlet of exhaust nozzle pipe connect with exhaust pipe 5.
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.
Self-regulation noise interference device 1 of the invention is by adjusting two areas being open, self-regulation noise interference device 1
Entire length or the shortest distances of two openings reach the noise reduction of specific multi-frequency noise.
The shortest distance for the noise interference device 1 that is self-regulated is defined as La, collapsing length is defined as Δ x and 0 < La+Δx≤
1000mm, Δ x >=0.This implements Δ x=Δ x as shown in Figure 41+Δx2, specific La+ Δ x=300mm.
It should be noted that the length of self-regulation 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.
K of the invention1And K2The shortest distance be defined as Δ L, and La> Δ L > 5mm, the Δ L of the present embodiment are specially
100mm.It should be noted that K of the invention1And K2The shortest distance can be 100mm, or be greater than 5mm, be less than La's
Any distance, depending on specific distance is with actual conditions.
The cross section of self-regulation noise interference device 1 of the invention it is conveniently of circular shape, or ellipse, square
Shape, triangle, diamond shape or the arbitrary shape in addition to above-mentioned shape, the shape of specific cross section according to the actual situation and
It is fixed.
The cross section of self-regulation noise interference device 1 of the invention is circle, as shown in (1) in Fig. 5.
The cross section of self-regulation noise interference device 1 of the invention is ellipse, as shown in (2) in Fig. 5.
The cross section of self-regulation noise interference device 1 of the invention is rectangle, as shown in (3) in Fig. 5.It should be noted
It is that the rectangle in the present invention 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 within the scope of the present invention.
The cross section of self-regulation noise interference device 1 of the invention is triangle, as shown in (4) in Fig. 5.
The cross section of self-regulation noise interference device 1 of the invention is diamond shape, as shown in (5) in Fig. 5.
The cross section of self-regulation noise interference device 1 of the invention is arbitrary shape, such as (6) in Fig. 5, (7) in Fig. 5
It is shown with (8) in Fig. 5.It should be noted that the present invention in arbitrary shape be not limited to (6) in Fig. 5, (7) in Fig. 5 and
This 3 kinds of rectangles of (8) in Fig. 5, other arbitrary shapes also comply with the requirement of arbitrary shape of the present invention, also in protection of the invention
In range.
The cross section of self-regulation noise interference device 1 is round or ellipse etc. without angular shape, it is possible to reduce
Sound wave to improve the effect with noise source sound wave interference, and then is improved in the loss of the energy of self-regulation noise interference device 1
The effect of noise reduction.
The principle of the present invention are as follows: self-regulation noise interference device 1 (Herschel-Quincke pipe) is according between sound wave
Interference achieve the effect that reduce sound.Self-regulation noise interference device 1 be according between sound wave resonance and interference reach drop
The effect of sound in a low voice.Because the noise interference device 1 that is self-regulated 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 self-regulation noise interference device 1, broadband noise waves are divided into the
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 enter self-regulation noise interference device 1 and with self-regulation noise interference device 1 resonate, and from oneself
Adjust one of them remittance main air duct 2 that is open out of noise interference device 1.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, second have a lot of social connections frequency noise wave enter self-regulation noise interference device 1 and with from
It adjusts noise interference device 1 to resonate, and one of them from the noise interference device 1 that is self-regulated is open out and imports main wind
Road.From the first via broadband noise waves that propagate from of self-regulation noise interference device 1 after importing main air duct 2 with main air duct 2
Second propagated has a lot of social connections frequency noise wave there are phase difference, and first via broadband noise waves and second are had a lot of social connections the generation of frequency noise wave
Interference forms interference broadband noise waves, amplitude decrease, noise drop of the interference broadband noise waves relative to broadband noise waves
It is low.
The basic frequency of 1 target noise reduction of noise interference device that is self-regulated and the length of velocity of sound c, the noise interference device 1 that is self-regulated
LaAnd the K of self-regulation noise interference device 11And K2Shortest distance Δ L functional dependence reciprocal, such as following formula:
Wherein f is the basic frequency of self-regulation 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 bright self-regulation noise of the present invention
Interference device 1 can form two basic frequencies and multiple harmonic frequencies so as to mutually relate to multi-frequency noise, reach wideband noise reduction
Purpose.
In the original state, the shortest distance L of self-regulation noise interference device 1a, when by biggish air pressure, self-regulated
It saves noise interference device 1 and extends Δ x, i.e., self-regulation 1 total length of noise interference device is La+Δx.The wherein collapsing length of Δ x
Cross-sectional area A, air pressure P depending on the noise interference device 1 that is self-regulatedS, the rigidity k that divides of pars contractilis 12, i.e.,The specific expression formula of above formula isWherein w is that the self extending based on different geometries is made an uproar
The correction factor that acoustic interference device 1 passes through experiment.
When self-regulation 1 total length of noise interference device is LaWhen, target main frequency is f0,1iAnd f0,2i.When self-regulation is made an uproar
Air pressure P in acoustic interference device 1SWhen sufficiently large, self-regulation noise interference device 1 stretches, and collapsing length is Δ x, stretches
The target basic frequency f formed at length Δ x0,1xAnd f0,2x.Wherein, the target basic frequency before the basic frequency after adjusting is less than is i.e.:
f0,1i>f0,1x, f0,2i>f0,2x
The kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device 1, is provided with exhaust nozzle pipe main body 2 and energy root
According to the self-regulation noise interference device 1 of air pressure inside automatic adjustment entire length, self-regulation noise interference device 1 is assemblied in exhaust
Blast tube main body 2.Area, self-regulation noise interference of the present invention by adjusting two openings of self-regulation noise interference device 1
The shortest distance of the entire length of device 1 or two openings reaches the noise reduction of specific multi-frequency noise.The kitchen ventilator is able to maintain
Long-term good noise reduction effect, the self-regulation noise interference device 1 have the advantages that low cost, reliability are high.The self-regulation is made an uproar
Acoustic interference device 1 be in resonance amplitude and phase, with wind channel tube through specific noise frequency the noise that transmits interfere with
The amplitude for lowering this noise frequency, the noise reduction for reaching specific multi-frequency noise are reduced.The self-regulation noise interference device 1
Material be anticorrosive, resist chemical and to be hardly damaged.
Embodiment 2.
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device 1, as shown in fig. 6, other features and implementation
Example 1 is identical, the difference is that, the M of the present embodiment1=M2, M3=M4。
The caliber of the noise reduction effect of self-regulation noise interference device 1 and air duct and the noise interference device 1 that is self-regulated has greatly
Relationship.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=
M4When, in M2Even if the region of lower section can reach the resonance phase and vibration that good noise reduction effect is formed in noise interference device
Some deviations of width, 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 acoustic phase and amplitude that self-regulation noise interference device 1 resonates have slight deviations will be to sound wave
Transmitting loss has significant change.In equal cross-sectional area M3=M4Under equal proportion, the transmitting for the noise interference device 1 that is self-regulated
Loss is Δ L/LaFunction.
Embodiment 3.
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device 1, as shown in FIG. 7 and 8, other features and reality
It is identical to apply example 1, the difference is that, the self-regulation noise interference device 1 of the present embodiment is provided with that can to increase self-regulation noise dry
The pars contractilis 12 and interference device main body 14 of 1 entire length of device are related to, pars contractilis 12 is flush-mounted in interference device main body 14.Pars contractilis
12 be the pars contractilis 12 with folded structure.The pars contractilis 12 of the present embodiment is specifically configured to 1.
Pars contractilis 12 of the invention can be set to 1, may be set to be multiple.Specific embodiment is according to reality
Depending on situation.
When the air pressure for the noise interference device 1 that is self-regulated is greater than the screen resilience of self-regulation noise interference device 1, band gauffer knot
12 diastole of pars contractilis of structure, self-regulation noise interference device 1 extend, when the air pressure of self-regulation noise interference device 1 is less than self-regulated
When saving the screen resilience of noise interference device 1, the pars contractilis 12 with folded structure is shunk.Pars contractilis with folded structure of the invention
12 specific structure is common knowledge, and those skilled in the art should know, be not repeated herein.
Compared with Example 1, this has self-regulation noise interference 1 leakproofness of device of pars contractilis 12 preferable.
Embodiment 4.
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device 1, as shown in Figures 9 and 10, other features with
Embodiment 1 is identical, the difference is that, the self-regulation noise interference device 1 of the present embodiment is provided with the extension that can increase length
Portion 13 and interference device main body 14, extension 13 are flush-mounted in interference device main body 14.Extension 13 is the extension with elastic construction
Portion 13.The extension 13 of the present embodiment is specifically configured to 1.
Extension 13 of the invention can be set to 1, may be set to be multiple.Specific embodiment is according to reality
Depending on situation.
When the air pressure for the noise interference device 1 that is self-regulated is greater than the screen resilience of self-regulation noise interference device 1, band elasticity knot
13 diastole of the extension self-regulation noise interference device 1 of structure extends, when the air pressure of self-regulation noise interference device 1 is less than self-regulation
When the screen resilience of noise interference device 1, the extension 13 with elastic construction is shunk.Extension 13 with elastic construction of the invention
Specific structure be common knowledge, those skilled in the art should know, be not repeated herein.
Compared with Example 1, this has the advantages that the structure of extension 13 is simple.
Embodiment 5.
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device 1, as shown in Figure 11 to 12, other features with
Embodiment 2 is identical, the difference is that, it adjusts noise interference device and is provided with the deformations 15 for changing diameter and interference device master
Body 14, deformations 15 are assemblied in interference device main body 14.The deformations 15 of the present embodiment are set as 1.
It should be noted that deformations 15 of the invention can be set to 1, may be set to be any just whole greater than 1
Number, the specific number of deformations 15 according to the actual situation depending on.
It is silica gel deformations 15, PE deformations that deformations 15 of the invention, which can be PVC deformations 15, rubber deformation portion 15,
15, any one of aluminium foil deformations 15 or latex deformations 15, specific embodiment according to the actual situation depending on.This reality
The deformations 15 for applying example are specially PVC deformations 15.
The kitchen ventilator exhaust nozzle pipe of self-regulation noise interference device 1 of the invention, when in self-regulation noise interference device 1
When portion's pressure is greater than the largest deformation resistance of deformations 15, deformations 15 start expansion and internal diameter increases；When self-regulation noise is dry
When relating to largest deformation resistance of 1 internal pressure of device less than deformations 15, deformations 15 are started to shrink and internal diameter reduces；Work as self-regulated
When section 1 internal pressure of noise interference device is 0, deformations 15 restore reset condition.Deformations 15 of the invention are made an uproar with self-regulation
The internal diameter of 1 internal pressure of acoustic interference device, self-regulation noise interference device 1 also changes, so that it is dry to influence self-regulation noise
The noise reduction frequency for relating to device 1, achievees the purpose that wideband noise reduction.
Embodiment 6.
A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device 1, as shown in Figure 13 to 16, other features with
Embodiment 1 is identical, the difference is that, exhaust nozzle pipe main body 2 of the invention is additionally provided with noise filtering device 3, noise mistake
Filter device 3 is assemblied in the inner surface in air duct.
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 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。
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 3131, through-hole 31 edge
Exist at a distance from the edge minimum range or noise filtering device 3 and exhaust nozzle pipe main body 2 of adjacent through-holes 31 with through-hole 31
It whether is independent space inside noise filtering device 3, just can determine that the resonant frequency of noise filtering device 3, it is special to reach reduction
Determine the purpose of frequency.
The present embodiment increases noise filtering device 3 and sound-absorbing part 4 compared with embodiment, and main purpose is target noise frequency to be allowed
The energy of rate can be filtered or be absorbed by noise filtering device 3 and sound-absorbing part 44 before not entering noise interference device 1 also, remaining
Noise penetrate again noise interference device elimination, to reach maximum noise reduction effect.
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 band self-regulation noise interference device, it is characterised in that: it is provided with for connecting wind
The exhaust nozzle pipe main body of machine and exhaust pipe and self-regulation noise interference device for reducing multi-frequency noise, self-regulation are made an uproar
Acoustic interference device is assemblied in exhaust nozzle pipe main body.
2. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 1, it is characterised in that: institute
It states self-regulation noise interference device and is provided with the sliding part and interference device that can increase self-regulation noise interference device entire length
Main body, sliding part are assemblied in interference device main body, and the sliding part extends along interference device main body opposite direction；
The sliding part is the sliding part of the hard rail structure with projectile body；
The sliding part is set as multiple.
3. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 1, it is characterised in that: institute
It states self-regulation noise interference device and is provided with the pars contractilis and interference device that can increase self-regulation noise interference device entire length
Main body, pars contractilis are flush-mounted in interference device main body；
The pars contractilis is the pars contractilis with folded structure；
The pars contractilis is set as multiple.
4. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 1, it is characterised in that: institute
It states self-regulation noise interference device and is provided with the extension that can increase length and interference device main body, extension is flush-mounted in interference dress
Set main body；
The extension is the extension with elastic construction；
The extension is set as multiple.
5. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 1, it is characterised in that: institute
State self-regulation noise interference device be provided with change diameter deformations and interference device main body, deformations be assemblied in interference device
Main body；
The deformations are PVC deformations；Or
The deformations are rubber deformation portion；Or
The deformations are silica gel deformations；Or
The deformations are PE deformations；Or
The deformations are aluminium foil deformations；Or
The deformations are latex deformations；
The deformations are provided with multiple.
6. the kitchen ventilator exhaust nozzle pipe with self-regulation noise interference device according to claim 2 to 5 any one,
Be characterized in that: self-regulation noise interference device setting there are two opening, two openings respectively with exhaust nozzle pipe main body
The horizontal position of air duct connection and two openings is different；
K will be defined as close to the opening of air inlet of air duct1, K1Area be defined as M1, the opening close to duct outlet is defined as
K2, K2Area be defined as M2；
The area of the air inlet in the air duct is defined as K3, K3Area be defined as M3；
The area of the air outlet in the air duct is defined as K4, K4Area be defined as M4；
The M1=M2, M3=M4。
7. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 6, it is characterised in that: institute
Self-regulation noise interference device is stated by adjusting the entire length or two of two areas being open, the noise interference device that is self-regulated
The shortest distance of a opening reaches the noise reduction of specific multi-frequency noise；
The shortest distance for the noise interference device that is self-regulated is defined as La, collapsing length is defined as Δ x and 0 < La+Δx≤
1000mm, Δ x >=0；
The K1And K2The shortest distance be defined as Δ L, and La> Δ L > 5mm.
8. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 7, it is characterised in that: institute
State self-regulation noise interference device cross section shape be circle, ellipse, rectangle, triangle, diamond shape or remove above-mentioned shape
Arbitrary shape other than shape.
9. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 8, it is characterised in that: institute
It states exhaust nozzle pipe main body and is additionally 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.
10. the kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device according to claim 9, it is characterised in that:
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；
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 |
|---|---|---|---|
| CN201811420920.3A CN109373397A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420920.3A CN109373397A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device |
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|---|---|
| CN109373397A true CN109373397A (en) | 2019-02-22 |
Family
ID=65383267
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811420920.3A Pending CN109373397A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608551A (en) * | 2019-10-11 | 2019-12-24 | 刘坪坪 | Refrigeration compressor based on wind pressure variable flow regulation |
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