CN209622881U - A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band - Google Patents
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band Download PDFInfo
- Publication number
- CN209622881U CN209622881U CN201821969231.3U CN201821969231U CN209622881U CN 209622881 U CN209622881 U CN 209622881U CN 201821969231 U CN201821969231 U CN 201821969231U CN 209622881 U CN209622881 U CN 209622881U
- Authority
- CN
- China
- Prior art keywords
- noise
- noise interference
- embedded
- aperture
- exhaust nozzle
- 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.)
- Active
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Duct Arrangements (AREA)
Abstract
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, it is provided with the exhaust nozzle pipe main body for connecting range hood fan and exhaust pipe and the embedded noise interference device for reducing multi-frequency noise, embedded noise interference device is assemblied in exhaust nozzle pipe main body.The embedded noise interference device of the utility model reaches the noise reduction of specific multi-frequency noise by adjusting the shortest distance of the area of the first aperture and the second aperture, the entire length in noise interference channel or the first aperture and the second aperture.The kitchen ventilator is able to maintain long-term good noise reduction effect, which has the advantages that low cost, reliability are high.The embedded noise interference device is that the noise that transmits interferes and reaches the noise reduction of specific multi-frequency noise to lower the amplitude of this noise frequency and reduced in resonance amplitude and phase, with wind channel tube through specific noise frequency.The material of the embedded noise interference device is anticorrosive, resist chemical and is hardly damaged.
Description
Technical field
The utility model relates to kitchen ventilator field, in particular to the kitchen ventilator of a kind of embedded noise interference device of band is vented
Blast tube.
Background technique
It is chronically in the environment of high noisy, the hearing of people is often damaged, and can also be made in the environment of having noise for a long time
At user emotion problem.As people's quality of the life improves, people are also lower and lower to the tolerance of noise.Therefore kitchen ventilator
Noise reduction is also got more and more attention.
Kitchen ventilator noise reduction in the prior art is mostly the reduction that noise is realized by active noise reduction and passive noise reduction mode.
Active noise reduction mode can only act on noise of the frequency within 1000Hz, can only be by passive for the noise greater than 1000Hz
Noise reduction technology processing.However passive noise reduction is mainly by being wrapped in noise source or pipeline with acoustical cotton.But exist following several
A disadvantage: one, air pressure consume is excessive, and noise and fluid are needed across acoustical cotton, and sound can be consumed using friction, reach drop
The effect made an uproar, but air performance is reduced simultaneously.Two, it is difficult to select suitable acoustical cotton, seldom supplying factory can mention
For acoustical cotton can acoustic absorptivity at different frequencies data, therefore the manufacturing enterprise of kitchen ventilator can only continuously attempt to and mistake
In find out type or thickness of suitable acoustical cotton etc..Three, the noise reduction frequency of acoustical cotton is uncontrollable, for universal acoustical cotton
Maximum noise reduction effect cannot be reached under specified narrow frequency, different strategies can not be collocated with each other from design also to carry out more
Effective noise reduction.
Therefore in view of the shortcomings of the prior art, provide a kind of kitchen ventilator exhaust nozzle pipe of embedded noise interference device of band with
It is very necessary to solve prior art deficiency.
Utility model content
One of the purpose of this utility model is to avoid the deficiencies in the prior art place and provide a kind of embedded noise of band
The kitchen ventilator exhaust nozzle pipe of interference device.The kitchen ventilator exhaust nozzle pipe with embedded noise interference device can reduce specific
Multi-frequency noise.
The above-mentioned purpose of the utility model is realized by following technical measures:
A kind of kitchen ventilator exhaust nozzle pipe of embedded noise interference device of band is provided, is provided with for connecting lampblack absorber wind
The exhaust nozzle pipe main body of machine and exhaust pipe and embedded noise interference device for reducing multi-frequency noise, it is embedded to make an uproar
Acoustic interference device is assemblied in exhaust nozzle pipe main body.
The embedded noise interference device is internally provided with noise interference channel, and noise interference channel is provided with first
Aperture and the second aperture, noise interference channel are connected to by the first aperture and the second aperture with the air duct of exhaust nozzle pipe main body,
And first aperture and the second aperture horizontal position it is different.
Preferably, above-mentioned embedded noise interference device is structure as a whole or separable assembled structure.
Preferably, above-mentioned embedded noise interference device is the wall surface of exhaust nozzle pipe main body.
Another preferred, above-mentioned embedded noise interference device is assemblied in the wall surface of exhaust nozzle pipe main body.
Preferably, above-mentioned embedded noise interference device is dry by adjusting the area of the first aperture and the second aperture, noise
The shortest distance of the entire length or the first aperture and the second aperture that relate to channel reaches the noise reduction of specific multi-frequency noise.
First aperture is defined as K1, K1Area be defined as M1, the second aperture is defined as K2, K2Area be defined as M2,
The area of the air inlet in air duct is defined as K3, K3Area be defined as M3, the area of the air outlet in air duct is defined as K4, K4Area
It is defined as M4；
Preferably, above-mentioned M1=M2, M3=M4；
Preferably, the 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, the shape of the cross section in above-mentioned noise interference channel be circle, ellipse, rectangle, triangle, diamond shape or
Arbitrary shape of the person in addition to above-mentioned shape.
Preferably, above-mentioned noise interference channel is provided with a plurality of.
Preferably, above-mentioned exhaust nozzle pipe main body is provided with noise filtering device, and noise filtering device is assemblied in air duct
Inner surface.
Preferably, above-mentioned noise filtering device is set as being distributed with multiple for eliminating the face of the through-hole of multi-frequency noise
Plate.
Preferably, the aperture of above-mentioned through-hole is defined as d, and d≤30mm.
Preferably, the edge minimum range of the edge of above-mentioned through-hole and adjacent through-holes is b, and b is the arbitrary value greater than 0.
Preferably, the value of above-mentioned d is multiple.
Preferably, the value of above-mentioned b is multiple.
Preferably, above-mentioned noise filtering device is by adjusting the aperture of different through-holes or the edge of through-hole and adjacent through-holes
Edge minimum range or noise filtering device reach specific unifrequency noise or multifrequency at a distance from exhaust nozzle pipe main body
The noise reduction of rate noise.
Preferably, there are gaps between above-mentioned noise filtering device and the inner surface in air duct, are by the distance definition in gap
H1。
Preferably, above-mentioned exhaust nozzle pipe main body is additionally provided with sound-absorbing part, and sound-absorbing part fixing assembling is in gap.
Preferably, the thickness of above-mentioned sound-absorbing part is defined as H2, and H2≤0.6H1；
Preferably, above-mentioned sound-absorbing part is fiber, PP cotton, polyester fiber, carbon fiber or porous foam.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band of the utility model, is provided with for connecting
The exhaust nozzle pipe main body of range hood fan and exhaust pipe embeds for reducing the embedded noise interference device of multi-frequency noise
Formula noise interference device is assemblied in exhaust nozzle pipe main body；The embedded noise interference device is internally provided with noise interference
Channel, noise interference channel are provided with the first aperture and the second aperture, and noise interference channel passes through the first aperture and the second aperture
It is connected to the air duct of exhaust nozzle pipe main body, and the first aperture is different with the horizontal position of the second aperture.The utility model is embedded
Formula noise interference device is by adjusting the area of the first aperture and the second aperture, the entire length or first in noise interference channel
The shortest distance of aperture and the second aperture reaches the noise reduction of specific multi-frequency noise.The kitchen ventilator is able to maintain long-term good noise reduction
Effect, the embedded noise interference device have the advantages that low cost, reliability are high.The embedded noise interference device is to penetrate
The noise transmitted in the resonance amplitude and phase, with wind channel tube of specific noise frequency is interfered to lower the vibration of this noise frequency
Width, the noise reduction for reaching specific multi-frequency noise are reduced.The material of the embedded noise interference device is anticorrosive, anti-ization
It learns corrosion and is hardly damaged.
Detailed description of the invention
The utility model is further described using attached drawing, but the content in attached drawing is not constituted to the utility model
Any restrictions.
Fig. 1 is a kind of kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 1.
Fig. 2 is the embedded noise interference apparatus structure perspective view in Fig. 1.
Fig. 3 is the schematic cross-section of Fig. 1.
Fig. 4 is the length L of the embedded noise interference device of Fig. 3aWith for K1And K2Shortest distance Δ L schematic diagram.
Fig. 5 is the schematic diagram of the shape of the cross section in noise interference channel, and (1) in Fig. 5 is circle, (2) in Fig. 5
For ellipse, (3) in Fig. 5 are rectangle, and (4) in Fig. 5 are triangle, and (5) in Fig. 5 are diamond shape, and (6) in Fig. 5 are to appoint
It anticipates shape, (7) in Fig. 5 are arbitrary shape, and (8) in Fig. 5 are arbitrary shape.
Fig. 6 is a kind of kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 2.
Fig. 7 is the embedded noise interference apparatus structure schematic diagram of embodiment 3.
Fig. 8 is the arrow direction schematic cross-section of Fig. 7.
Fig. 9 is a kind of kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 4.
Figure 10 is the enlarged drawing of Z region in Fig. 9.
Figure 11 is the structural schematic diagram of noise filtering device in Fig. 9.
Figure 12 is the edge minimum range relation schematic diagram at the edge and adjacent through-holes of through-hole aperture and through-hole in Figure 11.
Figure 13 is the embedded noise interference apparatus structure schematic diagram of separable assembled structure.
Figure 14 is the embedded noise interference apparatus structure schematic diagram of separable assembled structure.
Figure 15 is a kind of kitchen ventilator exhaust nozzle pipe structural schematic diagram of the embedded noise interference device of band of embodiment 6.
Fig. 1 includes into Figure 15:
Embedded noise interference device 1, noise interference channel 11,
Exhaust nozzle pipe main body 2,
Noise filtering device 3, through-hole 31,
Sound-absorbing part 4,
Exhaust pipe 5.
Specific embodiment
The technical solution of the utility model is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band is provided with as shown in Fig. 1 to 5 for connecting
Connect the exhaust nozzle pipe main body 2 of range hood fan and exhaust pipe 5 and the embedded noise interference for reducing multi-frequency noise
Device 1, embedded noise interference device 1 are assemblied in exhaust nozzle pipe main body 2.
Embedded noise interference device 1 is internally provided with noise interference channel 11, and noise interference channel 11 is provided with
One aperture and the second aperture, noise interference channel 11 pass through the air duct of the first aperture and the second aperture and exhaust nozzle pipe main body 2
Connection, and the first aperture is different with the horizontal position of the second aperture.The embedded noise interference device 1 of the present embodiment can be
Integral structure.Embedded noise interference device 1 is assemblied in the wall surface of exhaust nozzle pipe main body 2.
It should be noted that the embedded noise interference device 1 of the utility model can be structure as a whole, or seperated
Package assembly, depending on situation is embodied according to the actual situation.The embedded noise interference device 1 of the utility model can be row
The wall surface of gas jets pipe main body 2, or embedded noise interference device 1 is the wall surface of exhaust nozzle pipe main body 2, specific real
Depending on applying situation according to the actual situation.
Embedded noise interference device 1, which has the advantage that, is the reduction of exposed volume, keeps integral product appearance more succinct,
The embedded noise interference device 1 of integral structure is technique assembles, production fit on is simpler, more saves the time.
First aperture is defined as K1, K1Area be defined as M1, the second aperture is defined as K2, K2Area be defined as M2,
The area of the air inlet in air duct is defined as K3, K3Area be defined as M3, the area of the air outlet in air duct is defined as K4, K4Area
It is defined as M4。
The utility model can be with M1=M2, M3=M4, can also be with M1≠M2, M3≠M4.The M of the present embodiment1=M2, M3≠
M4。M3≠M4The advantages of be the structure that exhaust nozzle pipe can be made preferably to deacclimatize external kitchen ventilator.
Embedded noise interference device 1 is by adjusting the area of the first aperture and the second aperture, noise interference channel 11
Entire length or the shortest distance of the first aperture and the second aperture reach the noise reduction of specific multi-frequency noise.Noise interference channel
11 length is defined as La, and 0 < La≤ 1000mm, the L of the present embodimentaSpecially 300mm.K1And K2The shortest distance be defined as
Δ L, and La> Δ L > 5mm, the Δ L of the present embodiment is specially 100mm.
It should be noted that the length of the embedded noise interference device 1 of the utility model can be 300mm, or
Greater than 0, random length less than 1000mm, depending on specific length is with actual conditions.It should be noted that the K of the utility model1
And K2The shortest distance can be 100mm, or be greater than 5mm, be less than LaAny distance, specific distance is with practical feelings
Depending on condition.
The cross section in the noise interference channel 11 of the utility model 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 in the noise interference channel 11 of the utility model is circle, as shown in (1) in Fig. 5.
The cross section in the noise interference channel 11 of the utility model is ellipse, as shown in (2) in Fig. 5.
The cross section in the noise interference channel 11 of the utility model is rectangle, as shown in (3) in Fig. 5.It should be noted
It is that the rectangle in the utility model is not limited to this rectangle of (3) in Fig. 5, other rectangles also comply with the utility model square
The requirement of shape, it is also within the protection scope of the present utility model.
The cross section in the noise interference channel 11 of the utility model is triangle, as shown in (4) in Fig. 5.
The cross section in the noise interference channel 11 of the utility model is diamond shape, as shown in (5) in Fig. 5.
The cross section in the noise interference channel 11 of the utility model 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 arbitrary shape in the utility model is not limited to (6) in Fig. 5, in Fig. 5
(7) this 3 kinds of rectangles of (8) and in Fig. 5, other arbitrary shapes also comply with the requirement of the utility model arbitrary shape, also at this
In the protection scope of utility model.
The cross section in noise interference channel 11 is round or ellipse etc. without angular shape, it is possible to reduce sound wave exists
The loss of the energy in noise interference channel 11 to improve the effect with noise source sound wave interference, and then improves the effect of noise reduction.
The principles of the present invention are as follows: embedded noise interference device 1 (Herschel-Quincke pipe) is according to sound wave
Between interference achieve the effect that reduce sound.Embedded noise interference device 1 be according between sound wave resonance and interference reach
To the effect for reducing sound.Because embedded noise interference device 1 has multiple resonant frequencies: f0,1、f0,2、fs1And fs2.Oil
The broadband noise waves that smoke machine generates are propagated in main air duct 2, when encountering embedded noise interference device 1, broadband noise waves
It is divided into first via broadband noise waves and second to have a lot of social connections frequency noise wave, first via broadband noise waves continue in main air duct 2
It propagates；Second has a lot of social connections frequency noise wave into embedded noise interference device 1 and occurs altogether with embedded noise interference device 1
Vibration, and from embedded noise interference device 1 one of them be open out import main air duct 2.It has a lot of social connections frequency noise wave when second
Have and f0,1、f0,2、fs1And fs2When same or similar frequency, second has a lot of social connections frequency noise wave into embedded noise interference
Device 1 simultaneously resonates with embedded noise interference device 1, and one of them from embedded noise interference device 1 is open out
To import main air duct.The first via broadband noise waves propagated from from embedded noise interference device 1 are after importing main air duct 2
Second propagated with main air duct 2 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 frequency
Noise waves interfere 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 embedded 1 target noise reduction of noise interference device and velocity of sound c, noise interference channel 11aAnd
The K of embedded noise interference device 11And K2Shortest distance Δ L functional dependence reciprocal, such as following formula:
Wherein f is the basic frequency of embedded 1 target noise reduction of noise interference device, and F is function representation symbol.It is specific in above formula
Expression formula are as follows:And N=(2p+1)/2, wherein N is subfrequency multiple, and p is arbitrary integer.
So the basic frequency of target noise reduction frequency is expressed as f0,1And f0,2, subfrequency fs1And fs2It can indicate
Are as follows:
fs1=[3f0,1,5f0,1,...........,xf0,1],
fs2=[2f0,2,3f0,2,...........,yf0,2],
Wherein ∞ >=x >=2m+1, m=1,2,3....., ∞, wherein ∞ >=y >=2, because the utility model is embedded to make an uproar
Acoustic interference device 1 can form two basic frequencies and multiple harmonic frequencies so as to mutually relate to multi-frequency noise, reach wideband drop
The purpose made an uproar.
The kitchen ventilator exhaust nozzle pipe with embedded noise interference device, is provided with for connecting range hood fan and row
The exhaust nozzle pipe main body 2 of tracheae 5 and embedded noise interference device 1 for reducing multi-frequency noise, embedded noise
Interference device 1 is assemblied in exhaust nozzle pipe main body 2；The noise interference that is internally provided with of the embedded noise interference device 1 leads to
Road 11, noise interference channel 11 are provided with the first aperture and the second aperture, and noise interference channel 11 passes through the first aperture and second
Aperture is connected to the air duct of exhaust nozzle pipe main body 2, and the first aperture is different with the horizontal position of the second aperture.The utility model
Embedded noise interference device 1 is by adjusting the area of the first aperture and the second aperture, the entire length in noise interference channel 11
Or first the shortest distance of aperture and the second aperture reach the noise reduction of specific multi-frequency noise.The kitchen ventilator is able to maintain long-term good
Good noise reduction effect, the embedded noise interference device 1 have the advantages that low cost, reliability are high.The embedded noise interference
Device 1 is the resonance amplitude and phase through specific noise frequency, and the noise for managing interior transmitting with air duct 2 is interfered to lower
The amplitude of this noise frequency, the noise reduction for reaching specific multi-frequency noise are reduced.The material of the embedded noise interference device 1
Material is anticorrosive, resist chemical and is hardly damaged.
Embodiment 2.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in fig. 6, other features and embodiment
1 is identical, the difference is that, the M of the present embodiment1=M2, M3=M4。
The caliber in the noise reduction effect of embedded noise interference device 1 and air duct 2 and noise interference channel 11 has great pass
System.The utility model 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 that good noise reduction effect is formed in embedded noise interference device 1
Position and some deviations of amplitude, with this condition, broadband noise frequency can be effectively reduced in this.
In M3>M4When, in M2The noise reduction effect in the region of lower section is confined to specific narrow frequency noise, and noise reduction effect can poor one
A bit.This is because as long as the acoustic phase and amplitude of the resonance of embedded noise interference device 1 have slight deviations will be to sound wave
Transmitting loss has significant change.In equal cross-sectional area M3=M4Under equal proportion, the transmitting of embedded noise interference device 1
Loss is Δ L/LaFunction.
Embodiment 3.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in Fig. 7 and 8, other features and reality
It is identical to apply example 1, the difference is that, the noise interference channel 11 of the present embodiment is provided with a plurality of.The present embodiment is specifically provided with 3
Noise interference channel 11.
It should be noted that the noise interference channel 11 of the utility model can be set to 3, may be set to be greater than 1
Any positive integer, specific item number according to the actual situation depending on.
Compared with Example 1, the parameter in multiple noise interference channels 11 of the present embodiment can be the same or different.
The noise interference channel 11 for the parameter that difference is, the specific different f of the basic frequency in different noise interference channels 110,1And f0,2,
Therefore the noise of more broadband can be reduced.For the noise interference channel 11 with identical parameters, identical frequency can be improved
Noise reduction effect.Noise reduction effect can be improved in a plurality of noise interference channel 11.
Embodiment 4.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in Fig. 9 to 12, other features with
Embodiment 1 is identical, the difference is that, the exhaust nozzle pipe main body 2 of the utility model is provided with noise filtering device 3, noise
Filter device 3 is assemblied in the inner surface in air duct 2.
Noise filtering device 3 is set as being distributed with multiple for eliminating the panel of the through-hole 31 of multi-frequency noise.
The aperture of through-hole 31 is defined as d, and d≤30mm.The value of d is multiple.
The edge of through-hole 31 and the edge minimum range of adjacent through-holes 31 are b, and b is the arbitrary value greater than 0.The value of b is more
It is a.
In the constant situation of aperture d, the smaller elimination of value of the edge minimum range b at the edge and adjacent through-holes 31 of through-hole 31
Target noise frequency it is bigger.Under the edge of through-hole 31 and the constant situation of edge minimum range b of adjacent through-holes 31, aperture
The smaller target noise frequency to be eliminated of the value of d is with regard to smaller.
It should be noted that when the value of value and d for b is unique, it can be to specific unifrequency noise noise reduction.But work as b
It can be according to the two value with being combined into specific unifrequency noise or multi-frequency noise noise reduction when with d being multiple and different values.B's
Value and the number of value of d, size according to the actual situation depending on.
The utility model is by adjusting the aperture of different through-holes 31 or the edge at the edge of through-hole 31 and adjacent through-holes 31
Minimum range or noise filtering device 3 reach specific unifrequency noise at a distance from exhaust nozzle pipe main body 2 or multi-frequency is made an uproar
The noise reduction of sound.
There are gaps between the noise filtering device 3 and the inner surface in air duct of the utility model, by the distance definition in gap
For H1.Exhaust nozzle pipe main body 2 is additionally provided with sound-absorbing part 4, and 4 fixing assembling of sound-absorbing part is in gap.The thickness of sound-absorbing part 4 is defined as
H2, and H2≤0.6H1.Sound-absorbing part 4 is fiber, PP cotton, polyester fiber, carbon fiber or porous foam.
The denoising device principle of the utility model: noise filtering device 3 can be in limited closed space, in noise source
When traveling to noise filtering device 3, noise reduction is carried out.Sound wave is usually propagated with opposite direction touching noise filtering device 3, so
Most incidence wave can be interfered with back wave.At the fixed distance of the characteristic about a quarter of noise source wavelength is away from degree
That is H1, the speed of particle reaches highest, because the utility model passes through the inner wall of noise filtering device 3 and exhaust nozzle pipe main body 2
The distance in face noise source wavelength a quarter 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 the sound-absorbing part 4 of the utility model is preferably fiber, PP cotton, polyester fiber, carbon fiber or more
Hole foam.
The determinant of the resonant frequency of the noise filtering device 3 of the utility model: the aperture of through-hole 31, through-hole 31
At a distance from the edge minimum range or noise filtering device 3 and exhaust nozzle pipe main body 2 of edge and adjacent through-holes 31 and through-hole
Whether 31 be independent space inside noise filtering device 3, just can determine that the resonant frequency of noise filtering device 3, reaches drop
The purpose of low specific frequency.
The present embodiment increases noise filtering device 3 and sound-absorbing part 4 compared with embodiment 1, and main purpose is target noise to be allowed
The energy of frequency also do not enter embedded noise interference device 1 before can by noise filtering device 3 and sound-absorbing part 4 filtering or
It absorbs, remaining noise is eliminated through embedded noise interference device 1 again, to reach maximum noise reduction effect.
Embodiment 5.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, other features are same as Example 1, different
Place is that embedded noise interference device 1 is separable assembled structure.The embedded noise of the separable assembled structure of the present embodiment
Interference device 1 is specially form shown in Figure 13.
It should be noted that the embedded noise interference device 1 of separable assembled structure is tightly connected by sealing element, seperated group
Form shown in the embedded noise interference device 1 or Figure 14 of assembling structure, or specific arbitrary separable assembled knot
Structure, specific form of implementation according to the actual situation depending on.
Compared with Example 1, the embedded noise interference device 1 of the separable assembled structure of the present embodiment has easy to process
The advantages of with using the later period to clean.
Embodiment 6.
A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, as shown in figure 15, other features and implementation
Example 2 is identical, the difference is that, embedded noise interference device 1 is the wall surface of exhaust nozzle pipe main body 2.
Compared with Example 1, embedded noise interference device 1 is directly processed into exhaust nozzle pipe main body 2, can will arrange
Gas jets pipe main body 2 and embedded noise interference device 1 are combined into one, while reducing exposed volume, make integral product appearance
It is more succinct, the noise interference device of integral structure in technique assembling, production fit on is simpler, more saves the time.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model rather than to this is practical
The limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, the common skill of this field
Art personnel, which should be appreciated that, can be modified or replaced equivalently technical solutions of the utility model, practical new without departing from this
The spirit and scope of type technical solution.
Claims (9)
1. a kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band, it is characterised in that: it is provided with for connecting oil
The exhaust nozzle pipe main body of smoke machine blower and exhaust pipe and embedded noise interference device for reducing multi-frequency noise, it is interior
Embedded noise interference device is assemblied in exhaust nozzle pipe main body；
The embedded noise interference device is internally provided with noise interference channel, and noise interference channel is provided with the first aperture
With the second aperture, noise interference channel is connected to by the first aperture and the second aperture with the air duct of exhaust nozzle pipe main body, and the
One aperture is different with the horizontal position of the second aperture.
2. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 1, it is characterised in that: institute
Embedded noise interference device is stated to be structure as a whole or separable assembled structure.
3. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 2, it is characterised in that: institute
State the wall surface that embedded noise interference device is exhaust nozzle pipe main body.
4. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 2, it is characterised in that: institute
State the wall surface that embedded noise interference device is assemblied in exhaust nozzle pipe main body.
5. with the kitchen ventilator exhaust nozzle pipe of embedded noise interference device according to claim 3 or 4, feature exists
In: the embedded noise interference device is by adjusting the area of the first aperture and the second aperture, the entirety in noise interference channel
Length or the shortest distance of the first aperture and the second aperture reach the noise reduction of specific multi-frequency noise；
First aperture is defined as K1, K1Area be defined as M1, the second aperture is defined as K2, K2Area be defined as M2, wind
The area of the air inlet in road is defined as K3, K3Area be defined as M3, the area of the air outlet in air duct is defined as K4, K4Area it is fixed
Justice is M4；
The M1=M2, M3=M4；
The length in the noise interference channel is defined as La, and 0 < La≤1000mm；
The K1And K2The shortest distance be defined as Δ L, and La> Δ L > 5mm.
6. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 5, it is characterised in that: institute
The shape for stating the cross section in noise interference channel is circle, ellipse, rectangle, triangle or diamond shape.
7. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 6, it is characterised in that: institute
State noise interference channel be provided with it is a plurality of.
8. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 7, it is characterised in that: institute
It states exhaust nozzle pipe main body and is provided with noise filtering device, noise filtering device is assemblied in the inner surface in air duct；
The noise filtering device is set as being distributed with multiple for eliminating the panel of the through-hole of multi-frequency noise；
The aperture of the through-hole is defined as d, and d≤30mm；
The edge of the through-hole and the edge minimum range of adjacent through-holes are b, and b is the arbitrary value greater than 0；
The value of the d is multiple；
The value of the b is multiple；
The noise filtering device is minimum by adjusting the aperture of different through-holes or the edge of through-hole and the edge of adjacent through-holes
Distance or noise filtering device reach the drop of specific unifrequency noise or multi-frequency noise at a distance from exhaust nozzle pipe main body
It makes an uproar.
9. the kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band according to claim 8, it is characterised in that: institute
It states between noise filtering device and the inner surface in air duct there are gap, is 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 PP cotton, polyester fiber, carbon fiber or porous foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821969231.3U CN209622881U (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821969231.3U CN209622881U (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209622881U true CN209622881U (en) | 2019-11-12 |
Family
ID=68444502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821969231.3U Active CN209622881U (en) | 2018-11-27 | 2018-11-27 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209622881U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373402A (en) * | 2018-11-27 | 2019-02-22 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
-
2018
- 2018-11-27 CN CN201821969231.3U patent/CN209622881U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373402A (en) * | 2018-11-27 | 2019-02-22 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201474756U (en) | Single-row gas pipe muffler for diesel generator | |
| CN209622881U (en) | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band | |
| CN108731078A (en) | A kind of kitchen ventilator with noise filtering function bellows | |
| CN108731081A (en) | A kind of kitchen ventilator with noise filtering function exhausting component | |
| CN209431495U (en) | A kind of kitchen ventilator of band self-regulation diameter noise interference device | |
| CN109373395A (en) | A kind of casing of kitchen ventilator and kitchen ventilator with noise interference device | |
| CN109373402A (en) | A kind of kitchen ventilator exhaust nozzle pipe of the embedded noise interference device of band | |
| CN209655387U (en) | A kind of kitchen ventilator of multi-frequency noise interference device | |
| CN209655385U (en) | A kind of kitchen ventilator spiral case and kitchen ventilator with noise interference device | |
| CN209622882U (en) | A kind of kitchen ventilator of the embedded noise interference device of band | |
| CN109373397A (en) | A kind of kitchen ventilator exhaust nozzle pipe of band self-regulation noise interference device | |
| CN209744446U (en) | Range hood exhaust nozzle pipe with noise interference device | |
| CN209540966U (en) | A kind of kitchen ventilator with noise filtering function exhausting component | |
| CN208431852U (en) | A kind of kitchen ventilator with water conservancy diversion noise filtering device | |
| CN208566809U (en) | A kind of kitchen ventilator with multi-frequency noise filtering 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 | |
| CN109373396A (en) | A kind of kitchen ventilator with noise interference device | |
| CN109780603A (en) | A kind of kitchen ventilator spiral case and kitchen ventilator with noise interference device | |
| CN209655386U (en) | A kind of kitchen ventilator of wide frequency noise interference device | |
| CN209744442U (en) | Range hood with noise interference device | |
| CN109373401A (en) | A kind of kitchen ventilator and noise-reducing design method of multi-frequency noise interference device | |
| WO2022183741A1 (en) | Noise reduction motor assembly and cleaning device | |
| CN209744443U (en) | Range hood exhaust nozzle pipe with self-adjusting noise interference device | |
| CN208431853U (en) | A kind of kitchen ventilator with multilayer water conservancy diversion noise filtering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |