CN208938645U - Full range spreads silencing apparatus and vent passages sound-attenuating system - Google Patents
Full range spreads silencing apparatus and vent passages sound-attenuating system Download PDFInfo
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- CN208938645U CN208938645U CN201821409736.4U CN201821409736U CN208938645U CN 208938645 U CN208938645 U CN 208938645U CN 201821409736 U CN201821409736 U CN 201821409736U CN 208938645 U CN208938645 U CN 208938645U
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Abstract
The embodiment of the present application provides a kind of full range diffusion silencing apparatus and vent passages sound-attenuating system, full range by the way that multiple arranged in parallel of the ventilation extending direction along vent passages are arranged spreads muffling unit, a silencing channel is formed between adjacent two full ranges diffusion muffling unit, each full range diffusion muffling unit includes at least one full range diffusion noise elimination structure.Full range diffusion noise elimination structure includes the first metal perforated plate, the second metal perforated plate, multiple the first protrusions being oppositely arranged being set between the first metal perforated plate and the second metal perforated plate and the second protrusion and the sound-absorbing porous material for being filled in region between the first protrusion and the second protrusion and the first metal perforated plate and the second metal perforated plate, between each first protrusion and corresponding second protrusion between splicing to form corresponding cavity.It is able to ascend low-frequency range acoustical absorptivity by spreading noise elimination structure using full range as a result, and promotes the acoustical absorptivity of medium-high frequency section by attaching sound-absorbing porous material, to reach full frequency band noise elimination effect.
Description
Technical field
This application involves ventilating noise-elimination fields, spread silencing apparatus in particular to a kind of full range and vent passages disappear
Sound system.
Background technique
Silencer is that one kind can allow air-flow to pass through and the device of effective attenuation acoustic energy, installs silencer
It is the important measures for reducing air power noise.Common silencer Bu Tong substantially can be with according to its noise-cancelling theory and structure
It is divided into dissipative muffler, reactive muffler, impedance composite muffler and diffusion type silencer.Dissipative muffler is ventilation drop
Using most a kind of silencers in system of making an uproar, dissipative muffler is when being propagated in sound-absorbing material or structure using sound wave, because
Rub the mechanism that acoustic energy is converted to thermal energy and is dissipated, and achievees the purpose that noise elimination.In addition, also by diffusion structure and resonance
Sound absorption structure reaches the product of noise elimination purpose.
At present installation dissipative muffler Practical Project application in it is very universal, common are strip-type silencer,
Matrix form silencer, folded plate type silencer and various derivative class products, they are all the sound absorption characteristics using fiber-like material
Achieve the purpose that noise elimination, this kind of typical acoustic characteristics of silencer be there is good intermediate frequency acoustic attenuation performance, and low-frequency range by
In the limitation of fiber-like material, acoustic attenuation performance is poor, in addition, the fiber-like material that such silencer uses is to personnel and environment
There is certain harm.How to improve to low frequency acoustic attenuation performance in vent passages, effectively realizes ventilating noise-elimination noise reduction effect, be
Those skilled in the art's technical problem urgently to be resolved.
Utility model content
In order to overcome above-mentioned deficiency in the prior art, the application's is designed to provide a kind of full range diffusion silencing apparatus
And vent passages sound-attenuating system, to solve or improve the above problem.
To achieve the goals above, the embodiment of the present application the technical solution adopted is as follows:
In a first aspect, the embodiment of the present application, which provides full range, spreads silencing apparatus, it is applied to vent passages, the full range diffusion
Silencing apparatus includes:
Multiple full ranges along the ventilation extending direction setting of the vent passages spread muffling unit, and the multiple full range expands
Direction arranged in parallel of the muffling unit along the ventilation extending direction with the vent passages at predetermined angular is dissipated, adjacent two complete
A silencing channel is formed between frequency diffusion muffling unit；
Each full range diffusion muffling unit includes at least one full range diffusion noise elimination structure, each full range diffusion
Noise elimination structure includes:
First metal perforated plate；
Second metal perforated plate；
It is set to multiple the first protrusions being oppositely arranged between first metal perforated plate and second metal perforated plate
With the second protrusion, between each first protrusion and corresponding second protrusion between splicing to form corresponding cavity；And
It is filled in first protrusion and second protrusion and first metal perforated plate and second metal perforated plate
Between region sound-absorbing porous material；
When sound wave enters the silencing channel successively via first metal perforated plate or second metal perforated plate
After carrying out high frequency noise elimination by the sound-absorbing porous material afterwards, via multiple first protrusions and second protrusion in the noise elimination
Multiple scattered reflection and by the way that acoustic attenuation occurs after the resonance sound-absorbing of each cavity in channel.
Optionally, the predetermined angular is 90 degree.
Optionally, the full range diffusion noise elimination structure is made using hard surface material, wherein the hard surface
Material includes one of glass fiber reinforced gypsum, glass concrete, wood materials, particle plate material or more
Kind combination.
Optionally, between each first protrusion and corresponding second protrusion by structure glue sticking or be bolted with
Form corresponding cavity.
Optionally, each first protrusion of the full range diffusion noise elimination structure or the thickness range of the second protrusion are 5mm-
50mm。
Optionally, each first protrusion of the full range diffusion noise elimination structure or the height of projection range of the second protrusion are
25mm-250mm。
Optionally, the distance between two adjacent full ranges diffusion muffling unit range is 50mm-500mm.
Optionally, the sound-absorbing porous material is using mineral wool, rock wool, mineral wool, polyurethane foam, glass bead, micro-
The combination of one or more of grain plate.
Optionally, full range diffusion silencing apparatus further include for will each full range spread muffling unit with it is described
The fixed fixed structure of vent passages, the fixed structure include contact portion, are arranged in the of the opposite both ends of the contact portion
One fixed part and the second fixed part, multiple first bolts and multiple second bolts, first fixed part and described second are consolidated
Determine to form the first retained part and the second retained part between the portion two sides opposite with the contact portion, first clamping part
Divide and second retained part is used to clamp the side that each full range spreads muffling unit；
The bottom of first fixed part is provided with multiple first fixation holes, and the bottom of second fixed part is provided with more
A second fixation hole, each first bolt pass through corresponding first fixation hole and fix with the vent passages, each described
Second bolt passes through corresponding second fixation hole and fixes with the vent passages, will each full range spread muffling unit and
The vent passages are fixed.
Second aspect, the embodiment of the present application also provide a kind of vent passages sound-attenuating system, the vent passages sound-attenuating system
Silencing apparatus is spread including above-mentioned full range, the full range diffusion silencing apparatus is mounted in vent passages, for entering institute
The sound wave for stating vent passages carries out noise elimination processing.
In terms of existing technologies, the application has the advantages that
Full range diffusion silencing apparatus and vent passages sound-attenuating system provided by the embodiments of the present application are logical along ventilation by setting
The full range of multiple arranged in parallel of the ventilation extending direction in road spreads muffling unit, adjacent two full ranges diffusion muffling unit it
Between form a silencing channel, each full range diffusion muffling unit includes at least one full range diffusion noise elimination structure.Full range diffusion disappears
Acoustic form include the first metal perforated plate, the second metal perforated plate, be set to it is more between the first metal perforated plate and the second metal perforated plate
A the first protrusion being oppositely arranged and the second protrusion and it is filled in the first protrusion and the second protrusion and the first metal perforated plate and the
The sound-absorbing porous material in region between two metal perforated plates, between each first protrusion and corresponding second protrusion between splicing with shape
At corresponding cavity.As a result, when sound wave enters silencing channel successively via the first metal perforated plate or the second metal perforated plate after
After carrying out high frequency noise elimination by sound-absorbing porous material, repeatedly spread in silencing channel via multiple first protrusions and the second protrusion
It reflects and by the way that acoustic attenuation occurs after the resonance sound-absorbing of each cavity, to promote low frequency by spreading noise elimination structure using full range
Acoustical absorptivity, and the acoustical absorptivity by attaching sound-absorbing porous material promotion medium-high frequency, to reach full range noise elimination effect.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram that full range provided by the embodiments of the present application spreads silencing apparatus；
Fig. 2 is one of the structural schematic diagram that full range provided by the embodiments of the present application spreads noise elimination structure；
Fig. 3 is the second structural representation that full range provided by the embodiments of the present application spreads noise elimination structure；
Fig. 4 is the third structural representation that full range provided by the embodiments of the present application spreads noise elimination structure；
Fig. 5 is one of the mounting structure schematic diagram that full range provided by the embodiments of the present application spreads silencing apparatus；
Fig. 6 is the two of the mounting structure schematic diagram that full range provided by the embodiments of the present application spreads silencing apparatus；
Fig. 7 is the configuration schematic diagram of fixed structure shown in Fig. 5.
Icon: 100- full range spreads noise elimination structure；110- full range spreads muffling unit；120- full range spreads noise elimination structure；
The first metal perforated plate of 121-；The second metal perforated plate of 122-；The first protrusion 123-；The second protrusion 124-；125- sound-absorbing porous material；
130- fixed structure；131- contact portion；The first fixed part of 132-；The second fixed part of 133-；The first bolt of 134-；The second spiral shell of 135-
Bolt；The first fixation hole of 136-；The second fixation hole of 137-；200- vent passages.
Specific embodiment
Silencer is that one kind can allow air-flow to pass through and the device of effective attenuation acoustic energy, installs silencer
It is the important measures for reducing air power noise.Common silencer Bu Tong substantially can be with according to its noise-cancelling theory and structure
It is divided into dissipative muffler, reactive muffler, impedance composite muffler and diffusion type silencer.Dissipative muffler is ventilation drop
Using most a kind of silencers in system of making an uproar, dissipative muffler is when being propagated in sound-absorbing material or structure using sound wave, because
Rub the mechanism that acoustic energy is converted to thermal energy and is dissipated, and achievees the purpose that noise elimination.In addition, also by diffusion structure and resonance
Sound absorption structure reaches the product of noise elimination purpose.
At present installation dissipative muffler Practical Project application in it is very universal, common are strip-type silencer,
Matrix form silencer, folded plate type silencer and various derivative class products, they are all the sound absorption characteristics using fiber-like material
Achieve the purpose that noise elimination, this kind of typical acoustic characteristics of silencer be there is good intermediate frequency acoustic attenuation performance, and low-frequency range by
In the limitation of fiber-like material, acoustic attenuation performance is poor, in addition, the fiber-like material that such silencer uses is to personnel and environment
There is certain harm.How to improve to low frequency acoustic attenuation performance in vent passages, effectively realizes ventilating noise-elimination noise reduction effect, be
Those skilled in the art's technical problem urgently to be resolved.
During realizing technical scheme, discovery based on diffusion principle and can be total to present inventor at present
Vibration sound absorption principle realizes that low frequency is eliminated the noise, such as can increase the sound absorbing performance of low frequency by setting diffuser, by diffusion principle
The acoustic attenuation performance of low frequency can be increased by being applied to ventilating noise-elimination field, using resonance sound-absorbing structure can increase in low frequency it is sound damping quality
Can, but this kind of silencer is preferable in the noise elimination effect of low frequency, noise source wider for certain frequency bands, and noise source high frequency compared with
Big situation, the noise elimination product just seem insufficient in the sound deadening capacity of medium-high frequency.
Discovery based on above-mentioned technical problem, present inventor propose that following embodiments to solve the above problems, need
It is noted that defect present in the above scheme in the prior art, is that inventor is obtaining after practicing and carefully studying
Out as a result, therefore, the solution that the discovery procedure of the above problem and hereinafter the embodiment of the present application are proposed regarding to the issue above
Certainly scheme all should be the contribution that inventor makes the application during the application.
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
Technical staff's all other embodiment obtained without creative efforts belongs to the model of the application protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present application, it should be noted that the term of the orientation or positional relationship of some instructions is based on attached
Orientation or positional relationship shown in figure or this application product using when the orientation or positional relationship usually put, be only for
Convenient for description the application and simplify description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second "
It is described etc. being only used for distinguishing, is not understood to indicate or imply relative importance.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood in the application with concrete condition
In concrete meaning.
With reference to the accompanying drawing, it elaborates to some embodiments of the application.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Referring to Fig. 1, spreading the structural schematic diagram of silencing apparatus for full range provided by the embodiments of the present application.The present embodiment
In, full range diffusion silencing apparatus can be used for ventilating noise-elimination field, such as being mounted in vent passages to realize that ventilation is logical
The noise elimination noise reduction in road, it is of course possible to which full range diffusion silencing apparatus can also be applied to it according to actual needs by understanding
It is used in the space of its arbitrary all round closure.
As shown in Figure 1, full range diffusion silencing apparatus may include the multiple complete of the ventilation extending direction setting along vent passages
Frequency diffusion muffling unit 110 (3 are only shown in Fig. 1), multiple full range diffusion muffling units 110 prolong along the ventilation with vent passages
Direction is stretched into the direction arranged in parallel of predetermined angular, and two adjacent full ranges, which spread to form one between muffling unit 110 and eliminate the noise, to be led to
Road.
In the present embodiment, each full range diffusion muffling unit 110 may include at least one full range diffusion noise elimination structure 120
(3 are only shown in Fig. 1), each full range diffusion noise elimination structure 120 include the first metal perforated plate 121, the second metal perforated plate 122,
It is set to multiple the first protrusions 123 and second being oppositely arranged between the first metal perforated plate 121 and the second metal perforated plate 122
Protrusion 124 and it is filled in the first protrusion 123 and the second protrusion 124 and the first metal perforated plate 121 and the second metal perforated plate 122
Between region sound-absorbing porous material 125, between each first protrusion 123 and corresponding second protrusion 124 between splicing with shape
At corresponding cavity.
It is appreciated that it is convex that full range spreads muffling unit 110, full range diffusion noise elimination structure 120, first in actual implementation
The particular number of portion 123 and the second protrusion 124 can be configured according to actual design demand, and the present embodiment is not made this specifically
Limitation.
In actual application, when sound wave enters silencing channel successively via the first metal perforated plate 121 or second
After carrying out high frequency noise elimination by sound-absorbing porous material 125 after metal perforated plate 122, via multiple first protrusions 123 and the second protrusion
The 124 multiple scattered reflections and by the way that acoustic attenuation occurs after the resonance sound-absorbing of each cavity in silencing channel.
Thus it designs, the present embodiment spreads noise elimination structure 120 using full range by applying diffusion theory in noise elimination field
The first protrusion 123 and the second protrusion 124 can effectively promote low frequency acoustical absorptivity, and by attaching sound-absorbing porous material 125
High frequency acoustical absorptivity is promoted, to reach full range noise elimination effect.And if only setting diffuser eliminates the noise to low-frequency sound wave,
It is more demanding to diffuser size, such as frequency is reduced in 200Hz or so sound, diffuser unit width dimensions require to reach
About 1m, and sagitta direction scale causes to increase diffuser size, it is difficult to apply at this in real space at least more than 0.15m
In limited ventilating system.And what the first protrusion 123 provided in this embodiment and the second protrusion 124 and the cavity constituted formed
Resonance sound-absorbing structure is equivalent to mass-spring system, plays the role of absorbing acoustic wave energy, inhale compared to fiber-like material low frequency
Acoustic performance is stronger, can make up the deficiency of fiber-like material sound absorbing performance in low frequency, while also avoiding merely using diffusion
Structure absorbs defect more demanding for diffusion structure size when low-frequency sound wave.Meanwhile independent resonance sound-absorbing structure is although low
Frequency sound absorption effect is preferable, but it is insufficient in medium-high frequency sound absorption effect, and the present embodiment is further by resonance sound-absorbing structure outer layer
It attaches sound-absorbing porous material 125 and promotes the acoustical absorptivity of medium-high frequency, to achieve the purpose that full range is eliminated the noise.
In the present embodiment, the distribution mode of full range diffusion noise elimination structure 120 has an impact for the diffusion of sound, therefore full range
The arranged direction of diffusion muffling unit 110 should make acoustic propagation pass sequentially through 123 He of the first protrusion that full range spreads noise elimination structure 120
Second protrusion 124, optionally, in the present embodiment, which can be 90 degree, that is, multiple full ranges spread muffling unit
110 can be along the vertical direction arranged in parallel of the ventilation extending direction with vent passages.Thus it is arranged, multiple full ranges can be made
Diffusion muffling unit 110 is easier to be diffused sound wave, while can also save installation space.
Optionally, full range diffusion noise elimination structure 120 can be made using hard surface material, wherein hard surface
Material includes one of glass fiber reinforced gypsum, glass concrete, wood materials, particle plate material or more
Kind combination.It will of course be understood that in other embodiments, be also not excluded for full range diffusion noise elimination structure 120 can also use it is other
Hard surface material is made, and the present embodiment is not specifically limited this.
Optionally, sound-absorbing porous material 125 can using mineral wool, rock wool, mineral wool, polyurethane foam, glass bead,
Particle board and other any sound-absorbing porous materials 125 are made, and are not specifically limited herein.Wherein, sound-absorbing porous material
125 when being attached to the first protrusion 123 and outer the second protrusion 124, both can partially attach, and can also all attach, attaching it is more
Hole sound absorbing material more than 125, sound deadening capacity is bigger.As an implementation, sound-absorbing porous material 125 can be microparticle material.
Optionally, each first protrusion 123 of full range diffusion noise elimination structure 120 or the shape of the second protrusion 124 can be with
It is configured, such as is please referred to shown in Fig. 2 according to the scene demand of practical vent passages, cylindrical body can be used.In another example asking
As shown in fig.3, cuboid can be used.In another example please referring to shown in Fig. 4, bullet can be used.It is appreciated that in reality
Border is not limited to above-mentioned several shapes in each first protrusion 123 or the second protrusion 124 when designing.
Inventor has found that, in order to reach effectively sound diffusion, full range spreads the size of noise elimination structure 120 in the course of the research
Should be suitable with the wavelength of incident acoustic wave, shape, the size on full range diffusion 120 surface of noise elimination structure determine that full range diffusion is eliminated the noise
The diffusion frequency of device, for example, inventor, which sums up following empirical equation by a large amount of test datas, spreads noise elimination to full range
The size of structure 120 is designed:
2 π f/c a >=4, b/a >=0.15
In above formula, a is the width that full range spreads noise elimination structure 120；B is the protrusion height that full range spreads noise elimination structure 120；
C is THE VELOCITY OF SOUND IN AIR；F is the frequency of sound wave.For example, inventor works as a=0.17m, b=0.04m by testing discovery, full range expands
The length for dissipating noise elimination structure 120 is 3m.When the making material of full range diffusion noise elimination structure 120 is particle board, altogether using diffusion
The test result of vibration noise elimination structure are as follows:
Lower than 315Hz, sound deadening capacity is less than 10dB, 315Hz-500Hz, sound deadening capacity 10-20dB, and 500Hz-6300Hz disappears
Volume is greater than 20dB, and 6300Hz-10000Hz sound deadening capacity is greater than 20dB.
The test result for the full range diffusion noise elimination structure 120 that the present embodiment uses are as follows:
Lower than 125Hz, sound deadening capacity is less than 10dB, 125Hz-250Hz, sound deadening capacity 10-20dB, 250Hz-630Hz noise elimination
Amount is greater than 20-30dB, and 630Hz-1000Hz sound deadening capacity is greater than 30dB.
By comparison, full range diffusion noise elimination structure 120 provided in this embodiment is relative to individual diffusion resonant silencing knot
Its low frequency acoustic attenuation performance of structure has to be increased by a small margin, and medium-high frequency acoustic attenuation performance is obviously improved.In addition, inventor has found by test,
The height of projection b for spreading bigger resonant silencing structure length or the first protrusion 123 or the second protrusion 124 is bigger, Huo Zhe
The sound-absorbing porous material 125 that internal cavities between one protrusion 123 and the second protrusion 124 are bigger or outer layer attaches is thicker, should
The acoustic attenuation performance that full range spreads silencing apparatus is stronger.Those skilled in the art can be according to above-mentioned mentality of designing and reality as a result,
Application scenarios are designed full range diffusion silencing apparatus.
For example, single-piece the first protrusion 123 and the second protrusion 124 are made first, according to practical sound before the installation of practical air duct
The characteristic and noise reduction demand in source determine the surface shape of the first protrusion 123 and the second protrusion 124.Then, by 123 He of the first protrusion
Second protrusion 124 carries out splicing and passing through structure glue connection, and the attaching formation full range diffusion of sound-absorbing porous material 125 in outside, which is eliminated the noise, ties
Then multiple full ranges diffusion 120 sequence of noise elimination structure is arranged as column composition full range diffusion muffling unit 110 by structure 120, long
Degree direction can be adjusted according to noise reduction demand difference, and length is longer, and attenuation is bigger, and the spacing between each column is according to noise reduction
The difference of amount demand can be adjusted, and spacing is smaller, and attenuation is bigger.Finally, the full range after arrangement is spread muffling unit
The closing of 110 upper and lower ends, it is ensured that the leakproofness of cavity, and formed as shown in figure 1 between different full ranges diffusion muffling unit 110
The channel of similar dissipative muffler.
In addition, can also be using playing with building blocks by the way of, that is, elder generation's installing bottom layer between full range diffusion muffling unit 110
Full range spreads muffling unit 110, successively spreads muffling unit 110 toward top superposition full range according to the height in practical air duct.If
Full range diffusion 110 elemental size of muffling unit is too big in short transverse, needs to be fixed.
Optionally, structure glue sticking or bolt can be passed through between each first protrusion 123 and corresponding second protrusion 124
Connection is to form corresponding cavity.
Optionally, in the present embodiment, full range spreads each first protrusion 123 and the second protrusion 124 of noise elimination structure 120
Height of projection may range from 25mm-250mm.As an implementation, when diffusion frequency lower limit is 200Hz, full range
The height of projection of each first protrusion 123 and the second protrusion 124 of spreading noise elimination structure 120 should be greater than 30mm.
Optionally, in the present embodiment, when ventilation rate is 50%, between adjacent two full ranges diffusion muffling unit 110
Distance range can be 50mm-500mm.
Optionally, in the present embodiment, the thickness range of each first protrusion 123 and the second protrusion 124 can be 5mm-
50mm, corresponding thickness selection is different when using different materials, as an implementation, when each first protrusion, 123 He
It, can be thick using 10mm when the material of second protrusion 124 uses particle board.
Optionally, in the present embodiment, the thickness range that full range spreads muffling unit 110 can be 50mm-500mm.
Optionally, 5- Fig. 7 is please referred to, full range diffusion silencing apparatus can also include for the diffusion of each full range to disappear
The fixed fixed structure 130 of sound unit 110 and vent passages 200, fixed structure 130 may include that contact portion 131, setting are connecing
First fixed part 132 and the second fixed part 133, multiple first bolts 134 and multiple second spiral shells at the opposite both ends of contact portion 131
The first retained part is formed between bolt 135, the first fixed part 132 and the second fixed part 133 and the opposite two sides of contact portion 131
With the second retained part, the first retained part and the second retained part are used to clamp the side that each full range spreads muffling unit 110
End.The bottom of first fixed part 132 is provided with multiple first fixation holes 136, and the bottom of the second fixed part 133 is provided with multiple
Second fixation hole 137, each first bolt 134 pass through corresponding first fixation hole 136 and fix with vent passages 200, Mei Ge
Two bolts 135 pass through corresponding second fixation hole 137 and fix with vent passages 200, and each full range is spread muffling unit
110 is fixed with vent passages 200.Thus it is arranged, each full range can be spread muffling unit 110 and consolidated with vent passages 200
It is fixed, it changes so that full range diffusion silencing apparatus 100 be avoided to divide into seated position in wind action, to influence noise elimination noise reduction effect
Fruit.
In conclusion full range diffusion silencing apparatus provided by the embodiments of the present application and vent passages sound-attenuating system, by setting
The full range for setting multiple arranged in parallel of the ventilation extending direction along vent passages spreads muffling unit, adjacent two full ranges diffusion
A silencing channel is formed between muffling unit, each full range diffusion muffling unit includes at least one full range diffusion noise elimination structure.
Full range diffusion noise elimination structure includes the first metal perforated plate, the second metal perforated plate, is set to the first metal perforated plate and the second metal aperture
Multiple the first protrusions being oppositely arranged and the second protrusion between plate and it is filled in the first protrusion and the second protrusion and the first gold medal
The sound-absorbing porous material for belonging to region between orifice plate and the second metal perforated plate, between each first protrusion and corresponding second protrusion it
Between splicing to form corresponding cavity.As a result, when sound wave enters silencing channel successively via the first metal perforated plate or second
After carrying out high frequency noise elimination by sound-absorbing porous material after metal perforated plate, via multiple first protrusions and the second protrusion in silencing channel
Interior multiple scattered reflection and by the way that acoustic attenuation occurs after the resonance sound-absorbing of each cavity, thus by being eliminated the noise knot using full range diffusion
Structure promotes low frequency acoustical absorptivity, and the acoustical absorptivity of medium-high frequency is promoted by attaching sound-absorbing porous material, disappears to reach full range
Sound effective value.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case where without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and scope of the present application is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the application.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (8)
1. a kind of full range spreads silencing apparatus, which is characterized in that be applied to vent passages, the full range spreads silencing apparatus packet
It includes:
Muffling unit is spread along multiple full ranges of the ventilation extending direction setting of the vent passages, the multiple full range diffusion disappears
Along the ventilation extending direction with the vent passages at the direction arranged in parallel of predetermined angular, two adjacent full ranges expand sound unit
It dissipates and forms a silencing channel between muffling unit；
Each full range diffusion muffling unit includes at least one full range diffusion noise elimination structure, and each full range diffusion is eliminated the noise
Structure includes:
First metal perforated plate；
Second metal perforated plate；
Multiple the first protrusions being oppositely arranged being set between first metal perforated plate and second metal perforated plate and
Two protrusions, between each first protrusion and corresponding second protrusion between splicing to form corresponding cavity；And
It is filled between first protrusion and second protrusion and first metal perforated plate and second metal perforated plate
The sound-absorbing porous material in region；
When sound wave enter the silencing channel when successively via first metal perforated plate or second metal perforated plate after lead to
After crossing the sound-absorbing porous material progress high frequency noise elimination, via multiple first protrusions and second protrusion in the silencing channel
Interior multiple scattered reflection and by the way that acoustic attenuation occurs after the resonance sound-absorbing of each cavity.
2. full range according to claim 1 spreads silencing apparatus, which is characterized in that the predetermined angular is 90 degree.
3. full range according to claim 1 spreads silencing apparatus, which is characterized in that each first protrusion and corresponding
Pass through structure glue sticking between second protrusion or is bolted to form corresponding cavity.
4. full range according to claim 1 spreads silencing apparatus, which is characterized in that the full range spreads each of noise elimination structure
The thickness range of a first protrusion or the second protrusion is 5mm-50mm.
5. full range according to claim 1 spreads silencing apparatus, which is characterized in that the full range spreads each of noise elimination structure
The height of projection range of a first protrusion or the second protrusion is 25mm-250mm.
6. full range according to claim 1 spreads silencing apparatus, which is characterized in that adjacent two full ranges diffusion is eliminated the noise single
The distance between member range is 50mm-500mm.
7. full range according to claim 1 spreads silencing apparatus, which is characterized in that the full range diffusion silencing apparatus also wraps
It includes for the fixed structure that each full range diffusion muffling unit and the vent passages is fixed, the fixed structure includes
Contact portion, the first fixed part that the opposite both ends of the contact portion are set and the second fixed part, multiple first bolts and more
A second bolt forms first between first fixed part and second fixed part two sides opposite with the contact portion
Retained part and the second retained part, first retained part and second retained part are for clamping each full range
Spread the side of muffling unit；
The bottom of first fixed part is provided with multiple first fixation holes, and the bottom of second fixed part is provided with multiple
Two fixation holes, each first bolt pass through corresponding first fixation hole and fix with the vent passages, and each described second
Bolt passes through corresponding second fixation hole and fixes with the vent passages, by each full range spread muffling unit with it is described
Vent passages are fixed.
8. a kind of vent passages sound-attenuating system, which is characterized in that the vent passages sound-attenuating system includes appointing in claim 1-7
Full range described in meaning one spreads silencing apparatus, and the full range diffusion silencing apparatus is mounted in vent passages, for entrance
The sound wave of the vent passages carries out noise elimination processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409736.4U CN208938645U (en) | 2018-08-29 | 2018-08-29 | Full range spreads silencing apparatus and vent passages sound-attenuating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409736.4U CN208938645U (en) | 2018-08-29 | 2018-08-29 | Full range spreads silencing apparatus and vent passages sound-attenuating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208938645U true CN208938645U (en) | 2019-06-04 |
Family
ID=66719332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821409736.4U Withdrawn - After Issue CN208938645U (en) | 2018-08-29 | 2018-08-29 | Full range spreads silencing apparatus and vent passages sound-attenuating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208938645U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831431A (en) * | 2018-08-29 | 2018-11-16 | 正升环境科技股份有限公司 | Full range spreads silencing apparatus and vent passages sound-attenuating system |
| WO2020042628A1 (en) * | 2018-08-29 | 2020-03-05 | 正升环境科技股份有限公司 | Diffusion muffler, diffusion resonance muffler, full-spectrum diffusion muffler, muffling system of ventilation channel, and muffling method thereof |
| CN111609243A (en) * | 2020-05-26 | 2020-09-01 | 北京绿创声学工程股份有限公司 | Manufacturing method of large equivalent diameter conical tandem type noise elimination channel |
| CN114170991A (en) * | 2021-11-09 | 2022-03-11 | 中科建声(苏州)新材料科技有限公司 | Miniaturized broadband low-frequency noise elimination pipeline |
| CN114439125A (en) * | 2022-01-24 | 2022-05-06 | 厦门大学 | Ventilation sound barrier structure and wall body |
-
2018
- 2018-08-29 CN CN201821409736.4U patent/CN208938645U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831431A (en) * | 2018-08-29 | 2018-11-16 | 正升环境科技股份有限公司 | Full range spreads silencing apparatus and vent passages sound-attenuating system |
| WO2020042628A1 (en) * | 2018-08-29 | 2020-03-05 | 正升环境科技股份有限公司 | Diffusion muffler, diffusion resonance muffler, full-spectrum diffusion muffler, muffling system of ventilation channel, and muffling method thereof |
| US11536487B2 (en) | 2018-08-29 | 2022-12-27 | Zheng Sheng Environmental Technology Co., Ltd. | Diffusion muffling device, diffusion resonance muffling device, full-frequency diffusion muffling device, muffling system for ventilation channel, and muffling method using the same |
| CN108831431B (en) * | 2018-08-29 | 2024-06-18 | 正升环境科技股份有限公司 | Full-frequency diffusion noise elimination device and ventilation channel noise elimination system |
| CN111609243A (en) * | 2020-05-26 | 2020-09-01 | 北京绿创声学工程股份有限公司 | Manufacturing method of large equivalent diameter conical tandem type noise elimination channel |
| CN111609243B (en) * | 2020-05-26 | 2022-04-05 | 北京绿创声学工程股份有限公司 | Manufacturing method of large equivalent diameter conical tandem type noise elimination channel |
| CN114170991A (en) * | 2021-11-09 | 2022-03-11 | 中科建声(苏州)新材料科技有限公司 | Miniaturized broadband low-frequency noise elimination pipeline |
| CN114439125A (en) * | 2022-01-24 | 2022-05-06 | 厦门大学 | Ventilation sound barrier structure and wall body |
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