CN109373396A - A kind of kitchen ventilator with noise interference device - Google Patents
A kind of kitchen ventilator with noise interference device Download PDFInfo
- Publication number
- CN109373396A CN109373396A CN201811420917.1A CN201811420917A CN109373396A CN 109373396 A CN109373396 A CN 109373396A CN 201811420917 A CN201811420917 A CN 201811420917A CN 109373396 A CN109373396 A CN 109373396A
- Authority
- CN
- China
- Prior art keywords
- noise interference
- noise
- interference device
- exhausting
- kitchen ventilator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000009467 reduction Effects 0.000 claims abstract description 39
- 239000000779 smoke Substances 0.000 claims abstract description 21
- 229920000742 Cotton Polymers 0.000 claims description 24
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 19
- 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 6
- 239000000835 fiber Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000644 propagated effect Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000008451 emotion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Classifications
-
- 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
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid Mechanics (AREA)
- Duct Arrangements (AREA)
Abstract
A kind of kitchen ventilator with noise interference device is provided with smoke machine main body, spiral case and exhausting and denoising portion, and exhausting and denoising portion is assemblied in smoke machine main body, and spiral case is set in the inside in exhausting and denoising portion；The noise interference device and exhaust nozzle that exhausting and denoising portion is provided with for reducing multi-frequency noise, noise interference device are assemblied in exhaust nozzle, and exhaust nozzle is assemblied in smoke machine main body.The present invention reaches the noise reduction of specific multi-frequency noise by adjusting the shortest distance of the area of two openings of noise interference device, 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 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 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 with noise interference device.
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.Mainly from two parts, one is made under blade rotating stall in the fan noise source of kitchen ventilator
At eddy current crack, the other is blade be rotated in volute tongue generation noise.And under the rotation of high air quantity, blower is mainly made an uproar
Sound is the noise that volute tongue generates.
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 with noise interference device to solve the prior art not
Foot is very necessary.
Summary of the invention
A kind of oil with noise interference device is provided it is an object of the invention to avoid the deficiencies in the prior art place
Smoke machine.The oil smoke function with noise interference device reduces specific multi-frequency noise.
Above-mentioned purpose of the invention is realized by following technical measures:
A kind of kitchen ventilator with noise interference device is provided, smoke machine main body, spiral case and exhausting and denoising portion are provided with, is vented
Noise reduction unit is assemblied in smoke machine main body, and spiral case is set in the inside in exhausting and denoising portion.
The noise interference device and exhaust nozzle that exhausting and denoising portion is provided with for reducing multi-frequency noise, noise interference dress
It sets and is assemblied in exhaust nozzle, exhaust nozzle is assemblied in smoke machine main body.
Preferably, above-mentioned spiral case is provided with the outlet section with volute tongue and shell main body, shell main body and outlet section integrally connected.
Ground direction definition is lower section after kitchen ventilator is assembled, and the vertical height in exhausting and denoising portion is defined as HT, by outlet air
Vertical height at the top of the bottom in portion to exhausting and denoising portion is defined as HB, by the center for the draught fan impeller being assemblied in spiral case to row
Vertical height at the top of gas noise reduction unit is defined as HC, and HB≤HT≤HC。
Preferably, above-mentioned outlet section is set in the inside in exhausting and denoising portion.
Another preferred, above-mentioned outlet section and shell main body are all set in the inside in exhausting and denoising portion.
Preferably, above-mentioned exhausting and denoising portion is additionally provided with acoustical cotton.
Preferably, above-mentioned acoustical cotton is set in the lower section of exhaust nozzle.
Preferably, above-mentioned outlet section passes through the inside that acoustical cotton is set in exhausting and denoising portion.
Another preferred, above-mentioned outlet section and shell main body all pass through the inside that acoustical cotton is set in exhausting and denoising portion.
Preferably, above-mentioned noise interference device is provided with the first aperture, the second aperture and noise interference channel, noise interference
Channel is connected to the air duct of exhaust nozzle pipe main body respectively by the first aperture and the second aperture, and the first aperture and the second aperture
Horizontal position it is different.
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.
Preferably, above-mentioned noise interference device is provided with the first aperture, the second aperture and noise interference channel, noise interference
Channel is connected to the air duct of exhaust nozzle pipe main body respectively by the first aperture and the second aperture, the first aperture and the second aperture
Horizontal position is different, air inlet of first aperture close to air duct, air outlet of second aperture close to air duct.
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 duct outlet is defined as K4, K4Area it is fixed
Justice is M4, and 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, the monnolithic case in above-mentioned noise interference channel is c-type monnolithic case, outside З type monnolithic case, W type entirety
Shape, V-type monnolithic case, M type monnolithic case, m type monnolithic case, N-type monnolithic case, N-shaped monnolithic case, undaform are whole outer
Shape, broken line type monnolithic case or the arbitrary shape in addition to above-mentioned shape.
Preferably, the diameter in above-mentioned noise interference channel is D, and 0 < D≤100mm.
Preferably, the value of above-mentioned D is multiple.
Preferably, above-mentioned noise interference channel is provided with a plurality of.
Preferably, above-mentioned noise interference device is embedded noise interference device.
The noise interference device is the wall surface of exhaust nozzle；Or
The noise interference device is assemblied in the wall surface of exhaust nozzle.
A kind of kitchen ventilator with noise interference device of the invention, is provided with smoke machine main body, spiral case and exhausting and denoising portion,
Exhausting and denoising portion is assemblied in smoke machine main body, and spiral case is set in the inside in exhausting and denoising portion；Exhausting and denoising portion be provided with for reducing
The noise interference device and exhaust nozzle of multi-frequency noise, noise interference device are assemblied in exhaust nozzle, and exhaust nozzle is assemblied in
Smoke machine main body.The present invention by adjusting the area of two of noise interference device openings, the entire length in noise interference channel or
The shortest distance of person two openings reaches the noise reduction of specific multi-frequency noise.The kitchen ventilator is able to maintain long-term good noise reduction effect
Fruit, the noise interference device have the advantages that low cost, reliability are high.The noise interference device is through specific noise frequency
The noise transmitted in resonance amplitude and phase, with main air duct pipe is interfered to lower the amplitude of this noise frequency, reaches specific
The noise reduction of multi-frequency noise reduced.The material of the 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 schematic perspective view of kitchen ventilator with noise interference device of embodiment 1.
Fig. 2 is the right view in Fig. 1.
Fig. 3 is the schematic cross-section in the direction AA in Fig. 2.
Fig. 4 is the structural schematic diagram of spiral case.
Fig. 5 is the H of Fig. 4B、HTAnd HCRelation schematic diagram.
Fig. 6 is the length indication in noise interference device schematic cross-section and noise interference channel.
Fig. 7 is noise interference device schematic cross-section and K1And K2The shortest distance Δ L mark.
Fig. 8 is the schematic diagram of the shape of the cross section in noise interference channel, and (1) in Fig. 8 is circle, and (2) in Fig. 8 are
Ellipse, (3) in Fig. 8 are rectangle, and (4) in Fig. 8 are triangle, and (5) in Fig. 8 are diamond shape, and (6) in Fig. 8 are any
Shape, (7) in Fig. 8 are arbitrary shape, and (8) in Fig. 8 are arbitrary shape.
Fig. 9 is the schematic diagram of the monnolithic case in noise interference channel, and (1) in Fig. 9 is c-type monnolithic case, in Fig. 9
It (2) is З type monnolithic case, (3) in Fig. 9 are W type monnolithic case, and (4) in Fig. 9 are V-type monnolithic case, and (5) in Fig. 9 are
M type monnolithic case, (6) in Fig. 9 are m type monnolithic case, and (7) in Fig. 9 are N-type monnolithic case, and (8) in Fig. 9 are that N-shaped is whole
External shape, (9) in Fig. 9 are undaform monnolithic case, and (10) in Fig. 9 are undaform monnolithic case, and (11) in Fig. 9 are wave
Wave type monnolithic case, (12) in Fig. 9 are arbitrary shape, and (13) in Fig. 9 are arbitrary shape, and (14) in Fig. 9 are arbitrary shape
Shape, (15) in Fig. 9 are arbitrary shape, and (16) in Fig. 9 are arbitrary shape, and (17) in Fig. 9 are broken line type monnolithic case, figure
(18) in 9 are broken line type monnolithic case.
Figure 10 is the schematic diagram of the diameter D in noise interference channel.
Figure 11 is a kind of kitchen ventilator schematic cross-section with noise interference device of embodiment 2.
Figure 12 is a kind of kitchen ventilator stereoscopic schematic diagram with noise interference device of embodiment 3.
Figure 13 is the right view of Figure 12.
Figure 14 is the schematic cross-section in the direction AA of Figure 12.
Figure 15 is a kind of kitchen ventilator schematic cross-section with noise interference device of embodiment 4.
Figure 16 is the noise interference schematic device of embodiment 5.
Figure 17 is the schematic cross-section of the arrow direction of Figure 16.
Figure 18 is the perspective view of the exhaust nozzle of embodiment 6.
Fig. 1 includes into Figure 18:
Noise interference device 1, noise interference channel 11,
Exhausting and denoising portion 2, exhaust nozzle 21, acoustical cotton 22,
Spiral case 3, outlet section 31, volute tongue 32, shell main body 33,
Air-exhausting duct 4.
Specific embodiment
Technical solution of the present invention is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator with noise interference device is provided with smoke machine main body, spiral case 3 and exhaust as shown in Fig. 1 to 10
Noise reduction unit 2, exhausting and denoising portion 2 are assemblied in smoke machine main body, and spiral case 3 is set in the inside in exhausting and denoising portion 2.
The noise interference device 1 and exhaust nozzle 21 that exhausting and denoising portion 2 is provided with for reducing multi-frequency noise, noise are dry
It relates to device 1 and is assemblied in exhaust nozzle 21, exhaust nozzle 21 is assemblied in smoke machine main body.
The air outlet in exhausting and denoising portion 2 of the invention is connect with the air-exhausting duct 4 of smoke machine main body.
Spiral case 3 is provided with the outlet section 31 with volute tongue 32 and shell main body 33, shell main body 33 and 31 integrally connected of outlet section.
Ground direction definition is lower section after kitchen ventilator is assembled, and the vertical height in exhausting and denoising portion 2 is defined as HT, by outlet air
The vertical height at the bottom in portion 31 to 2 top of exhausting and denoising portion is defined as HB, the draught fan impeller (attached drawing that will be assemblied in spiral case 3
Be not shown) the vertical height at center to the top of exhausting and denoising portion 2 be defined as HC, and HB≤HT≤HC。
It should be noted that the assembly side of volute tongue 32 of the invention and the connection relationship of outlet section 31, draught fan impeller and spiral case 3
Formula is common knowledge, and those skilled in the art should know, is not repeated herein.
Outlet section 31 is set in the inside in exhausting and denoising portion 2.
Noise interference device 1 is provided with the first aperture, the second aperture and noise interference channel 11, and noise interference channel 11 is logical
It crosses the first aperture and the second aperture to be connected to the air duct of 21 pipe main body of exhaust nozzle respectively, the level of the first aperture and the second aperture
Position is different, air inlet of first aperture close to air duct, air outlet of second aperture close to air duct.
The length in noise interference channel 11 of the invention is defined as La, and 0 < La≤ 1000mm, the L of the present embodimentaSpecifically
For 300mm.
It should be noted that the length in noise interference channel 11 of the invention can be 300mm, or be greater than 0, be less than
The random length of 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
Any distance, depending on specific distance is with actual conditions.
Noise interference device 1 of the invention 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.
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 duct outlet is defined as K4, K4Area it is fixed
Justice is M4, and M1=M2, M3=M4。
The diameter in the noise reduction effect of noise interference device 1 and air duct and noise interference channel 11 has great relationship.This hair
Bright preferably M1=M2, M3=M4, can also be with M1≠M2, M3≠M4.Since in identical cross-sectional area, i.e. M3=M4When, in M2Under
Even if the region of side can reach resonance phase that good noise reduction effect is formed in noise interference device 1 and amplitude some partially
Difference, 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 noise interference device 1 resonates have slight deviations that will damage to the transmitting of sound wave
Mistake has significant change.In equal cross-sectional area M3=M4Under equal proportion, the slippages of noise interference device 1 are Δ L/La
Function.
The monnolithic case in noise interference channel 11 of the invention is preferably N-shaped monnolithic case, or c-type is whole outer
Shape, З type monnolithic case, W type monnolithic case, V-type monnolithic case, M type monnolithic case, m type monnolithic case, N-type monnolithic case, wave
Wave type monnolithic case, broken line type monnolithic case or the arbitrary shape in addition to above-mentioned shape, specific monnolithic case is according to reality
Depending on the situation of border.
C-type monnolithic case of the invention, as shown in (1) in Fig. 9.
З type monnolithic case of the invention, as shown in (2) in Fig. 9.
W type monnolithic case of the invention, as shown in (3) in Fig. 9.
V-type monnolithic case of the invention, as shown in (4) in Fig. 9.
M type monnolithic case of the invention, as shown in (5) in Fig. 9.
M type monnolithic case of the invention, as shown in (6) in Fig. 9.
N-type monnolithic case of the invention, as shown in (7) in Fig. 9.
N-shaped monnolithic case of the invention, as shown in (8) in Fig. 9.
Undaform monnolithic case of the invention is needed as shown in (9) in Fig. 9, (11) in (10) and Fig. 9 in such as Fig. 9
Illustrate, the undaform monnolithic case in the present invention is not limited to (9) in Fig. 9, in (10) and Fig. 9 in such as Fig. 9
(11) these three undaform monnolithic cases, any other undaform monnolithic case also comply with undaform monnolithic case of the present invention
It is required that also within the scope of the present invention.
Arbitrary shape of the invention, such as (12) in Fig. 9, (13) in such as Fig. 9, (14) in Fig. 9, (15) in Fig. 9
It is shown with (16) in Fig. 9, it should be noted that, the arbitrary shape in the present invention is not limited to (12) in Fig. 9, in such as Fig. 9
(13), this 5 kinds of arbitrary shapes of (14) in Fig. 9, (16) in (15) and Fig. 9 in Fig. 9, other arbitrary shapes also comply with this
The requirement of invention arbitrary shape, also within the scope of the present invention.
Broken line type monnolithic case of the invention, as shown in (17) in Fig. 9 and (18) in Fig. 9, it should be noted that, this hair
Broken line type monnolithic case in bright is not limited to this 2 kinds of broken line type monnolithic cases of (17) in Fig. 9 and (18) in Fig. 9,
His broken line type monnolithic case also complies with the requirement of broken line type monnolithic case of the present invention, also within the scope of the present invention.
The shape of c-type monnolithic case, N-shaped monnolithic case, m type monnolithic case or undaform monnolithic case etc. does not have corner angle
Shape, it is possible to reduce sound wave the energy in noise interference channel 11 loss, thus improve with the effect of noise source sound wave interference,
And then improve the effect of noise reduction.
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. 8.
The cross section in noise interference channel 11 of the invention is ellipse, as shown in (2) in Fig. 8.
The cross section in noise interference channel 11 of the invention is rectangle, as shown in (3) in Fig. 8.It should be noted that this hair
Rectangle in bright is not limited to this rectangle of (3) in Fig. 8, 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. 8.
The cross section in noise interference channel 11 of the invention is diamond shape, as shown in (5) in Fig. 8.
The cross section in noise interference channel 11 of the invention is arbitrary shape, such as (6) in Fig. 8, (7) in Fig. 8 and Fig. 8
In (8) shown in.It should be noted that the arbitrary shape in the present invention is not limited to (6) in Fig. 8, in (7) and Fig. 8 in Fig. 8
(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 of noise interference device 1 to improve the effect with noise source sound wave interference, and then improves the effect of noise reduction.
The diameter in noise interference channel 11 of the invention is D, and 0 < D≤100mm, and wherein the value of D is multiple.With this reality
For applying example, the shape of the monnolithic case N-shaped monnolithic case in noise interference channel 11, cross section is circle, and the value of D is more
A, i.e. the cross section in the noise interference channel 11 of the present embodiment is the circle of multiple and different internal diameters and global shape is c-type entirety
The noise interference device 1 of shape.
The noise interference channel 11 of the present embodiment be provided with it is multiple, specially 6.It should be noted that noise of the invention is dry
Relating to channel 11 can be with 6, or the arbitrary number greater than 2, specific performance according to the actual situation depending on.
The parameter in multiple noise interference channels 11 of the present embodiment can be the same or different.The parameter that difference is is made an uproar
Acoustic interference channel 11, the specific different f of the basic frequency in different noise interference channels 110,1And f0,2, therefore can reduce wider
The noise of frequency.For the noise interference channel 11 with identical parameters, the noise reduction effect of identical frequency can be improved.
The principle of the present invention are as follows: noise interference device 1 (Herschel-Quincke pipe) is according to the interference between sound wave
Achieve the effect that reduce sound.Noise interference device 1 be according between sound wave resonance and interference achieve the effect that reduce sound.
Because noise interference device 1 has multiple resonant frequencies: f0,1、f0,2、fs1And fs2.The broadband noise waves that kitchen ventilator generates exist
It is propagated in main air duct 2, when encountering noise interference device, broadband noise waves are divided into first via broadband noise waves and second and have a lot of social connections
Frequency noise wave, the continuation of first via broadband noise waves are propagated in main air duct 2；Second has a lot of social connections, and to enter noise dry for frequency noise wave
It relates to device 1 and resonates with noise interference device 1, and one of them from noise interference device is open out and 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 of having a lot of social connections is made an uproar
Sound wave enters noise interference device 1 and resonates with noise interference device 1, and one of them from noise interference device 1 is opened
Mouth, which comes out, imports main air duct.From the first via broadband noise waves that noise interference device 1 propagates from after importing main air duct 2 with
What main air duct 2 was propagated second has a lot of social connections frequency noise wave there are phase difference, and first via broadband noise waves and the second frequency of having a lot of social connections are made an uproar
Sound wave interferes to form interference broadband noise waves, and interference broadband noise waves subtract relative to the amplitude of broadband noise waves
Weak, noise reduces.
The length L of the basic frequency of 1 target noise reduction of noise interference device and velocity of sound c, noise interference device 1aAnd noise is dry
Relate to the K of device 11And K2Shortest distance Δ L functional dependence reciprocal, such as following formula:
Wherein f is the basic frequency of 1 target noise reduction of noise interference device, and F is function representation symbol.Expression in above 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 noise interference dress of the present invention
Two basic frequencies and multiple harmonic frequencies can be formed so as to mutually relate to multi-frequency noise by setting 1, achieve the purpose that wideband noise reduction.
The kitchen ventilator with noise interference device is provided with smoke machine main body, spiral case 3 and exhausting and denoising portion 2, exhausting and denoising
Portion 2 is assemblied in smoke machine main body, and spiral case 3 is set in the inside in exhausting and denoising portion 2.Exhausting and denoising portion 2 is provided with for reducing multifrequency
The noise interference device 1 and exhaust nozzle 21 of rate noise, noise interference device 1 are assemblied in exhaust nozzle 21, and exhaust nozzle 21 fills
Assigned in smoke machine main body.The present invention is by adjusting the area of two openings of noise interference device 1, 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 kitchen ventilator spiral case 3 is able to maintain long-term good
Good noise reduction effect, the noise interference device 1 have the advantages that low cost, reliability are high.The noise interference device 1 is through spy
The resonance amplitude and phase for determining noise frequency are interfered with the noise transmitted in main air duct pipe to lower the vibration of this noise frequency
Width, the noise reduction for reaching specific multi-frequency noise are reduced.The material of the noise interference device 1 is that anticorrosive, anti-chemistry is rotten
It loses and is hardly damaged.
Embodiment 2.
A kind of kitchen ventilator with noise interference device, as shown in figure 11, other features are same as Example 1, difference
It is in and is all set in the inside in exhausting and denoising portion 2 in, outlet section 31 of the invention and shell main body 33.
Compared with Example 1, the more parts of the spiral case 3 of this implementation are inserted in exhausting and denoising portion 2, can make to generate in volute tongue 32
Noise more enter in exhausting and denoising portion 2, and reduced inside exhausting and denoising portion 2, carry out high noise reduction effect to mention.
Embodiment 3.
A kind of kitchen ventilator with noise interference device, as shown in Figure 12 to 14, other features are same as Example 1, no
It is with place, exhausting and denoising portion 2 is additionally provided with acoustical cotton 22；Acoustical cotton 22 is set in the lower part of exhaust nozzle 21.Outlet section
31 pass through the inside that acoustical cotton 22 is set in exhausting and denoising portion 2.
The density and material of acoustical cotton 22 of the present invention have important influence, and sound wave can be directly through the sound-absorbing of extremely-low density
Cotton 22 can not increase the frictional wear of sound energy.Therefore acoustical cotton 22 of the invention is preferably fiber, PP cotton, polyester fiber, charcoal
Fiber or porous foam.
Compared with Example 1, the noise that this example increases that acoustical cotton 22 generates volute tongue 32 first absorbs, by inhaling
Noise after receipts is interfered again, to mention high noise reduction effect.
Embodiment 4.
A kind of kitchen ventilator with noise interference device, as shown in figure 15, other features are same as Example 3, difference
It is in outlet section 31 and shell main body 33 all pass through the inside that acoustical cotton 22 is set in exhausting and denoising portion 2.
Compared with Example 3, the more parts of the spiral case 3 of this implementation are inserted in exhausting and denoising portion 2, can make to generate in volute tongue 32
Noise more enter in exhausting and denoising portion 2, and reduced inside exhausting and denoising portion 2, carry out high noise reduction effect to mention.
Embodiment 5.
A kind of kitchen ventilator with noise interference device, as shown in FIG. 16 and 17, other features are same as Example 1, no
It is with place, the noise interference device 1 of the present embodiment is embedded noise interference device 1,1 row of being assemblied in of noise interference device
The wall surface of gas jets 21.
Compared with example 1, the not exposed appearance of noise interference device 1 is more succinct.Embedded noise interference device 1 is in technique
Assembling, production fit on is simpler and more saves the time, while reliability is promoted, because connecting component is reduced, it is easier to realize
Leakproof.
Embodiment 6.
A kind of kitchen ventilator with noise interference device, as shown in figure 18, other features are same as Example 1, difference
It is in the noise interference device 1 of the present embodiment is embedded noise interference device 1, and noise interference device 1 is exhaust nozzle 21
Wall surface.The noise interference channel 11 of the present embodiment is set as 2.
Compared with Example 5, noise interference device 1 is directly processed into the pipe of exhaust nozzle 21, can be by exhaust nozzle 21
Pipe and noise interference device 1 are combined into one, while reducing exposed volume, keep integral product appearance more succinct, integral structure
Noise interference device 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 (16)
1. a kind of kitchen ventilator with noise interference device, it is characterised in that: it is provided with smoke machine main body, spiral case and exhausting and denoising
Portion, exhausting and denoising portion are assemblied in smoke machine main body, and spiral case is set in the inside in exhausting and denoising portion；
The noise interference device and exhaust nozzle that exhausting and denoising portion is provided with for reducing multi-frequency noise, noise interference device dress
Assigned in exhaust nozzle, exhaust nozzle is assemblied in smoke machine main body.
2. the kitchen ventilator according to claim 1 with noise interference device, it is characterised in that: the spiral case is provided with band
The outlet section of volute tongue and shell main body, shell main body and outlet section integrally connected；
Ground direction definition is lower section after kitchen ventilator is assembled, and the vertical height in exhausting and denoising portion is defined as HT, by the bottom of outlet section
Vertical height at the top of portion to exhausting and denoising portion is defined as HB, by the center for the draught fan impeller being assemblied in spiral case to exhausting and denoising
Vertical height at the top of portion is defined as HC, and HB≤HT≤HC。
3. the kitchen ventilator according to claim 2 with noise interference device, it is characterised in that: the outlet section is set in
The inside in exhausting and denoising portion.
4. the kitchen ventilator according to claim 3 with noise interference device, it is characterised in that: the outlet section and shell master
Body is all set in the inside in exhausting and denoising portion.
5. the kitchen ventilator according to claim 2 with noise interference device, it is characterised in that: the exhausting and denoising portion is also
It is provided with acoustical cotton；
The acoustical cotton is set in the lower section of exhaust nozzle.
6. the kitchen ventilator according to claim 5 with noise interference device, it is characterised in that: the outlet section, which passes through, inhales
Sound cotton-padded covering is loaded on the inside in exhausting and denoising portion.
7. the kitchen ventilator according to claim 5 with noise interference device, it is characterised in that: the outlet section and shell master
Body all passes through the inside that acoustical cotton is set in exhausting and denoising portion.
8. with the kitchen ventilator of noise interference device according to claim 4 to 7 any one, it is characterised in that: it is described
Noise interference device is provided with the first aperture, the second aperture and noise interference channel, noise interference channel by the first aperture and
Second aperture is connected to the air duct of exhaust nozzle pipe main body respectively, and the first aperture is different with the horizontal position of the second aperture, and first
Air inlet of the aperture close to air duct, air outlet of second aperture close to air duct.
9. the kitchen ventilator according to claim 8 with noise interference device, it is characterised in that: the noise interference channel
Length be defined as La, and 0 < La≤1000mm；
The K1And K2The shortest distance be defined as Δ L, and La> Δ L > 5mm.
10. the kitchen ventilator according to claim 9 with noise interference device, it is characterised in that: the noise interference dress
It sets and is opened by adjusting the area of the first aperture and the second aperture, the entire length in noise interference channel or the first aperture and second
The shortest distance in hole reaches the noise reduction of specific multi-frequency noise；
First aperture is defined as K1, K1Area be defined as M1, the second aperture is defined as K2, K2Area be defined as M2, air duct
The area of air inlet be defined as K3, K3Area be defined as M3, the area of duct outlet is defined as K4, K4Area be defined as
M4, and M1=M2, M3=M4。
11. the kitchen ventilator according to claim 10 with noise interference device, it is characterised in that: the noise interference is logical
The shape of the cross section in road is circle, ellipse, rectangle, triangle, diamond shape or the arbitrary shape in addition to above-mentioned shape.
12. the kitchen ventilator according to claim 11 with noise interference device, it is characterised in that: the noise interference is logical
The monnolithic case in road is c-type monnolithic case, З type monnolithic case, W type monnolithic case, V-type monnolithic case, M type monnolithic case, m type
Monnolithic case, N-type monnolithic case, N-shaped monnolithic case, undaform monnolithic case, broken line type monnolithic case remove above-mentioned shape
Arbitrary shape in addition.
13. the kitchen ventilator according to claim 12 with noise interference device, it is characterised in that: the noise interference is logical
The diameter in road is D, and 0 < D≤100mm；
The value of the D is multiple.
14. the kitchen ventilator according to claim 13 with noise interference device, it is characterised in that: the noise interference is logical
Road is provided with a plurality of.
15. the kitchen ventilator according to claim 14 with noise interference device, it is characterised in that: the noise interference dress
It is set to embedded noise interference device.
16. the kitchen ventilator according to claim 15 with noise interference device, it is characterised in that: the noise interference dress
It is set to the wall surface of exhaust nozzle；Or
The noise interference device is assemblied in the wall surface of exhaust nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420917.1A CN109373396A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator with noise interference device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420917.1A CN109373396A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator with noise interference device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109373396A true CN109373396A (en) | 2019-02-22 |
Family
ID=65377281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811420917.1A Pending CN109373396A (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator with noise interference device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109373396A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022111280A1 (en) * | 2020-11-30 | 2022-06-02 | 广东美的白色家电技术创新中心有限公司 | Range hood |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201221800Y (en) * | 2008-05-27 | 2009-04-15 | 宁波方太厨具有限公司 | Air-out cover of cooking fume exhauster with active noise reduction function |
| US7536821B1 (en) * | 2003-10-01 | 2009-05-26 | The United States Of America As Represented By The Secretary Of The Army | Cartridge casing catcher with reduced firearm ejection port flash and noise |
| CN102072514A (en) * | 2011-01-20 | 2011-05-25 | 宁波方太厨具有限公司 | Noise reducing method for range hood and low-noise range hood |
| CN203687138U (en) * | 2013-12-31 | 2014-07-02 | 广东万和电气有限公司 | Range hood with noise-abatement device |
| CN203717463U (en) * | 2014-01-23 | 2014-07-16 | 浙江兴益风机电器有限公司 | Energy-efficient low-noise outer-rotor centrifugal fan |
| EP2754967A1 (en) * | 2013-01-11 | 2014-07-16 | Miele & Cie. KG | Extractor hood |
| CN207214201U (en) * | 2017-09-30 | 2018-04-10 | 宁波方太厨具有限公司 | A kind of near-suction type oil smoke suction machine |
| CN108240646A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of noise reducing type outlet housing of range hood |
| CN108731078A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering function bellows |
| CN209744442U (en) * | 2018-11-27 | 2019-12-06 | 佛山市云米电器科技有限公司 | Range hood with noise interference device |
-
2018
- 2018-11-27 CN CN201811420917.1A patent/CN109373396A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7536821B1 (en) * | 2003-10-01 | 2009-05-26 | The United States Of America As Represented By The Secretary Of The Army | Cartridge casing catcher with reduced firearm ejection port flash and noise |
| CN201221800Y (en) * | 2008-05-27 | 2009-04-15 | 宁波方太厨具有限公司 | Air-out cover of cooking fume exhauster with active noise reduction function |
| CN102072514A (en) * | 2011-01-20 | 2011-05-25 | 宁波方太厨具有限公司 | Noise reducing method for range hood and low-noise range hood |
| EP2754967A1 (en) * | 2013-01-11 | 2014-07-16 | Miele & Cie. KG | Extractor hood |
| CN203687138U (en) * | 2013-12-31 | 2014-07-02 | 广东万和电气有限公司 | Range hood with noise-abatement device |
| CN203717463U (en) * | 2014-01-23 | 2014-07-16 | 浙江兴益风机电器有限公司 | Energy-efficient low-noise outer-rotor centrifugal fan |
| CN207214201U (en) * | 2017-09-30 | 2018-04-10 | 宁波方太厨具有限公司 | A kind of near-suction type oil smoke suction machine |
| CN108240646A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of noise reducing type outlet housing of range hood |
| CN108731078A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering function bellows |
| CN209744442U (en) * | 2018-11-27 | 2019-12-06 | 佛山市云米电器科技有限公司 | Range hood with noise interference device |
Non-Patent Citations (1)
| Title |
|---|
| 李嵩: "Quincke 管反声降噪应用研究与离心风机风舌噪声的预估", 《QUINCKE 管反声降噪应用研究与离心风机风舌噪声的预估》, 30 March 2005 (2005-03-30), pages 2 - 5 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022111280A1 (en) * | 2020-11-30 | 2022-06-02 | 广东美的白色家电技术创新中心有限公司 | Range hood |
| CN114576661A (en) * | 2020-11-30 | 2022-06-03 | 广东美的白色家电技术创新中心有限公司 | Smoke machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4771546B2 (en) | Silencer duct | |
| CN111835130B (en) | Motor element and cleaning equipment | |
| US11486282B2 (en) | Vacuum cleaner and electric motor module thereof | |
| JP2008231979A (en) | Muffling chamber duct | |
| JPH0894146A (en) | Ceiling embedded type ventilating fan | |
| CN109373396A (en) | A kind of kitchen ventilator with noise interference device | |
| CN108731081A (en) | A kind of kitchen ventilator with noise filtering function exhausting component | |
| CN109373395A (en) | A kind of casing of kitchen ventilator and kitchen ventilator with noise interference device | |
| CN209622881U (en) | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band | |
| CN209655385U (en) | A kind of kitchen ventilator spiral case and kitchen ventilator with noise interference device | |
| CN209431495U (en) | A kind of kitchen ventilator of band self-regulation diameter noise interference device | |
| CN209655387U (en) | A kind of kitchen ventilator of multi-frequency noise interference device | |
| CN109780603A (en) | A kind of kitchen ventilator spiral case and kitchen ventilator with noise interference device | |
| CN209744442U (en) | Range hood with noise interference device | |
| CN209540966U (en) | A kind of kitchen ventilator with noise filtering function exhausting component | |
| WO2016047070A1 (en) | Range hood | |
| CN109373402A (en) | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band | |
| WO2019189127A1 (en) | Cpap devive | |
| CN109373397A (en) | A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device | |
| CN209657798U (en) | A kind of noise reduction household electrical appliance and air purifier, fan, vacuum cleaner and Blowing drum | |
| CN109373398A (en) | A kind of kitchen ventilator exhaust nozzle pipe with noise interference device | |
| CN111096708B (en) | Air outlet cover assembly of dust collector and dust collector with same | |
| CN205639099U (en) | Silence structure of fan | |
| CN209622882U (en) | A kind of kitchen ventilator of the embedded noise interference device of band | |
| CN209655386U (en) | A kind of kitchen ventilator of wide frequency noise interference device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |