CN101275700A - Array type silencer - Google Patents
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- CN101275700A CN101275700A CNA2008100663875A CN200810066387A CN101275700A CN 101275700 A CN101275700 A CN 101275700A CN A2008100663875 A CNA2008100663875 A CN A2008100663875A CN 200810066387 A CN200810066387 A CN 200810066387A CN 101275700 A CN101275700 A CN 101275700A
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- 230000003584 silencer Effects 0.000 title claims description 40
- 230000030279 gene silencing Effects 0.000 claims abstract description 25
- 238000009423 ventilation Methods 0.000 claims description 42
- 230000002745 absorbent Effects 0.000 claims description 29
- 239000002250 absorbent Substances 0.000 claims description 29
- 239000011358 absorbing material Substances 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 abstract description 103
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses an array type muffer, the technical problems to be solved are to advance the silencing ability. The array type muffer is provided with an absorbing body in the tube, wherein the absorbing body is a tube provided with sound absorption material inside, the axis of the tube is arranged along the airflow direction in parallel, and the tube is fixedly arranged in the air pipe through the bracket. Compared with the existing technology, in the same length of the muffer, the absorption surface of the unit cross area is increased, the absorption property is advanced, the noise reduction effect is good, which ensures that in the same noise reduction effect, the length and the volume of the muffer are reduced, the air flow area of the unit cross area is increased, the flow velocity of the absorbing body is reduced, the air noise is reduced, the pressure loss is small, thereby reducing the pressure of the system fan, reducing the cost of the air system. The whole muffer is decomposed into each small absorbing body and the parts for installing the bracket, which is convenient for the transportation and installment.
Description
Technical field
The present invention relates to a kind of equipment of noise reduction, particularly a kind of equipment that is applicable to the noise elimination reduction pneumatic noise of large-section ventilation duct.
Technical background
Noise is that a class causes people's agitation, the sound that is detrimental to health.The mode that noise reduction adopts sound absorption usually, eliminates the noise and insulate against sound.Silencing apparatus is a kind of common device that can make air communication cross and can reduce effectively noise, can reduce the import and export of various aerodynamic force equipment or the noise that transmits along pipeline.Its principle of noise reduction difference of different silencing apparatuss.Noise elimination technique commonly used has resistance noise reduction, reactive muffling, loss-type to eliminate the noise, diffusion is eliminated the noise etc.Common large-scale air channel, as: the silencing apparatus in subway, mine, tunnel adopts strip-type silencer, and this kind silencing apparatus has characteristic of simple structure, but has the shortcoming that the noise elimination effect is undesirable, gas-flow resistance is big, volume is big, inconvenience is installed in transportation.
Summary of the invention
The purpose of this invention is to provide a kind of array type silencer, the technical problem that solve is to improve acoustical absorptivity, convenient transportation and installation.
The present invention is by the following technical solutions: a kind of array type silencer, be provided with sound absorbent in the body of silencing apparatus, described sound absorbent is a body, is provided with sound-absorbing material in the body, the axis of body is arranged in parallel along airflow direction, and described body is fixedly mounted in the ventilation duct by support.
Sound absorbent of the present invention two ends are provided with the circular arc air guide sleeve, and sound absorbent is provided with perforated plate along the surface of body.
Arrangement mode of the present invention is a plurality of equilateral quadrilaterals or equilateral triangle.
Sound absorbent of the present invention cross section is circle or polygonal.
Polygonal of the present invention is triangle, quadrilateral, pentagon, Hexagon or Octagon.
Polygonal of the present invention is equilateral triangle, quadrilateral, pentagon, Hexagon or Octagon.
Sound-absorbing material of the present invention is filled in the sound absorbent.
The sectional shape of circular arc air guide sleeve of the present invention is circle, triangle, quadrilateral, pentagon, Hexagon or Octagon.
Perforated plate of the present invention be shaped as circle or polygonal.
Body section area of the present invention is 40000～1x10
6Mm
2, long 300～10000mm.
The present invention compared with prior art, under the silencing apparatus equal length, the sound absorbent surface of unit cross-sectional area is long-pending to be increased, acoustical absorptivity improves, excellent noise reduction effect, under the situation that guarantees same noise reduction, array type silencer length and volume can reduce, thereby reduce the noise reduction cost, the airflow area of unit cross-sectional area increases, flow velocity between sound absorbent reduces, and pneumatic noise reduces, and the pressure loss also reduces, thereby reduce the pressure of system fan, reduce the cost of whole ventilation system, whole silencing apparatus is resolved into the one by one little sound absorbent and the part of mounting bracket, convenient transportation and installation.
Description of drawings
The structural representation of Fig. 1 embodiment of the invention one.
The structural representation of Fig. 2 embodiment of the invention two.
The structural representation of Fig. 3 embodiment of the invention three.
The structural representation of Fig. 4 embodiment of the invention four.
The structural representation of Fig. 5 embodiment of the invention five.
The structural representation of Fig. 6 embodiment of the invention six.
The structural representation of Fig. 7 embodiment of the invention seven.
The structural representation of Fig. 8 embodiment of the invention eight.
The structural representation of Fig. 9 embodiment of the invention nine.
The structural representation of Figure 10 embodiment of the invention ten.
The structural representation of Figure 11 embodiment of the invention 11.
The structural representation of Figure 12 embodiment of the invention 12.
Figure 13-the 1st, prior art strip-type silencer sketch.
Figure 13-the 2nd, embodiment of the invention array type silencer sketch.
Figure 14 is a silencing apparatus sound deadening capacity comparison diagram.
Figure 15 is two kinds of silencing apparatus air-flow regenerated noise comparison diagrams.
Figure 16-the 1st, the structural representation of embodiment of the invention air guide sleeve one.
Figure 16-the 2nd, the structural representation of embodiment of the invention air guide sleeve two.
Figure 16-the 3rd, the structural representation of embodiment of the invention air guide sleeve three.
Figure 16-the 4th, the structural representation of embodiment of the invention air guide sleeve four.
Figure 16-the 5th, the structural representation of embodiment of the invention air guide sleeve five.
Figure 16-the 6th, the structural representation of embodiment of the invention air guide sleeve six.
Figure 17-the 1st, the structural representation of embodiment of the invention perforated plate one.
Figure 17-the 2nd, the structural representation of embodiment of the invention perforated plate two.
Figure 17-the 3rd, the structural representation of embodiment of the invention perforated plate three.
Figure 17-the 4th, the structural representation of embodiment of the invention perforated plate four.
Figure 17-the 5th, the structural representation of embodiment of the invention perforated plate five.
Figure 17-the 6th, the structural representation of embodiment of the invention perforated plate six.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.Array type silencer of the present invention, adopt sound absorbent, the cross section of sound absorbent is circular or polygonal sound absorption body, and sound absorption body two ends are the circular arc air guide sleeve, to reduce gas-flow resistance, the outside is a perforated plate, the inner sound-absorbing material of placing of sound absorption body, and axis is arranged in parallel along airflow direction, be fixedly mounted in the ventilation duct of large-section by mounting bracket, when air communication was crossed space between the sound absorbent, the sound absorbent absorption of noise was to reach the effect that reduces noise.The present invention is applicable to the large-section ventilation duct, as: subway, mine, tunnel.
Embodiment one, as shown in Figure 1, array type silencer of the present invention is made up of sound absorption body 1 and support 2, sound absorption body 1 cross section is circular, two ends are the circular arc air guide sleeve, and shown in Figure 16-1, the sectional shape of circular arc air guide sleeve is circular, to shown in Figure 16-6, can also be triangle, quadrilateral, pentagon, Hexagon or Octagon as Figure 16-1 Figure 16-2.Sound absorption body 1 outside is provided with perforated plate along the surface of body, and as shown in figure 17, perforated plate is shaped as circle, to shown in Figure 17-3, can also be triangle, quadrilateral, pentagon, Hexagon or Octagon as Figure 17-1.Sound absorption body 1 inner filling sucting sound material, sound-absorbing material is a mineral cotton.By equilateral quadrangular array, the distance between sound absorption body 1 axis is 400mm between adjacent sound absorption body 1 axis, sound absorption body 1 section area 4x10
4Mm
2, long 300mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 200mm.
Embodiment two, as shown in Figure 2, array type silencer of the present invention is made up of sound absorption body 1 and support 2, sound absorption body 1 cross section is circular, and two ends are the circular arc air guide sleeve, and outer surface is provided with perforated plate, sound absorption body 1 inner the filling placed sound-absorbing material, by triangular arranged, the distance between sound absorption body 1 axis is 400mm between adjacent sound absorption body 1 axis, sound absorption body 1 section area 4x10
4Mm
2Long 1000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 500mm.
Embodiment three, as shown in Figure 3, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is an equilateral triangle, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is an equilateral triangle, and sound absorption body 1 inner the filling placed sound-absorbing material, presses equilateral quadrangular array between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 600mm, sound absorption body 1 section area 1.6x10
5Mm
2, long 2000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 250mm.
Embodiment four, as shown in Figure 4, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is an equilateral triangle, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is an equilateral triangle, and sound absorption body 1 inner the filling placed sound-absorbing material, presses triangular arranged between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 600mm, sound absorption body 1 section area 1.6x10
5Mm
2, long 3000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 250mm.
Embodiment five, as shown in Figure 5, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is equilateral quadrilateral, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is equilateral quadrilateral, and sound absorption body 1 inner the filling placed sound-absorbing material, presses equilateral quadrangular array between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 600mm, sound absorption body 1 section area 2.5x10
5Mm
2, long 4000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 300mm.
Embodiment six, as shown in Figure 6, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is equilateral quadrilateral, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is circle or polygonal, and sound absorption body 1 inner the filling placed sound-absorbing material, and adjacent sound absorption body 1 axis is by triangular arranged, distance between sound absorption body 1 axis is 600mm, sound absorption body 1 section area 2.5x10
5Mm
2, long 5000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 300mm.
Embodiment seven, as shown in Figure 7, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is equilateral pentagon, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is circle or polygonal, and sound absorption body 1 inner the filling placed sound-absorbing material, presses equilateral quadrangular array between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 700mm, sound absorption body 1 section area 3.6x10
5Mm
2, long by 6000, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 350mm.
Embodiment eight, as shown in Figure 8, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is equilateral pentagon, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is circle or polygonal, and body 1 inner filling that absorb sound placed sound-absorbing material, presses triangular arranged between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 700mm, sound absorption body 1 section area 3.6x10
5Mm
2, long 7000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 350mm.
Embodiment nine, as shown in Figure 9, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is an equilateral hexagon, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is circle or polygonal, and sound absorption body 1 inner the filling placed sound-absorbing material, presses equilateral quadrangular array between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 800mm, sound absorption body 1 section area 3.6x10
5Mm
2, long 8000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 400mm.
Embodiment ten, as shown in figure 10, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is an equilateral hexagon, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is circle or polygonal, and body 1 inner filling that absorb sound placed sound-absorbing material, presses triangular arranged between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 800mm, sound absorption body 1 section area 3.6x10
5Mm
2, long 9000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 400mm.
Embodiment 11, as shown in figure 11, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is equilateral Octagon, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is circle or polygonal, and sound absorption body 1 inner the filling placed sound-absorbing material, presses equilateral quadrangular array between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 1000mm, sound absorption body 1 section area 6.4x10
5Mm
2, long 10000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 500mm.
Embodiment 12, as shown in figure 12, array type silencer of the present invention is made up of sound absorption body 1 and support 2, and sound absorption body 1 cross section is equilateral Octagon, and two ends are the circular arc air guide sleeve, the remaining surface of outside sound absorbent except that two ends is perforated plate, perforated plate is circle or polygonal, and body 1 inner filling that absorb sound placed sound-absorbing material, presses triangular arranged between adjacent sound absorption body 1 axis, distance between sound absorption body 1 axis is 1000mm, sound absorption body 1 section area 6.4x10
5Mm
2, long 10000mm, sound absorption body 1 is fixedly mounted on the support 2 by standard piece such as bolts, and support 2 then dependence is bolted in the ventilation duct 3 of civil engineering, and sound absorption body 1 axis of contiguous ventilation duct 3 walls and the distance between ventilation duct 3 walls are 500mm.
Non-equilateral triangle, quadrilateral, pentagon, Hexagon or Octagon also can be adopted in above-mentioned sound absorption body 1 cross section.
The performance evaluation of array type silencer of the present invention comprises sound deadening capacity, air-flow regenerated noise and the pressure loss, makes a concrete analysis of as follows:
1, the acoustical behavior of silencing apparatus
1.1 sound deadening capacity (TL)
φ---extinction coefficient, relevant with the normal direction acoustic absorptivity, internal structure and thickness decision by anechoic sheet can obtain by experiment;
S---aisle spare, m
2
M---silencing apparatus expansion ratio;
F---frequency, Hz;
C---the velocity of sound, m/s;
P---the passage section girth of effectively eliminating the noise, m;
The length that L---silencing apparatus is effectively eliminated the noise, m;
After ignoring the resistance part
1.2, the air-flow regenerated noise
The air-flow distribution of silencing apparatus and circulation are than being different under the different installation forms, and air-flow distributes even more, and it is bigger than more to circulate, and the air-flow regenerated noise is more little.According to formula (2), can calculate the regenerated noise sound power level that two kinds of installation form downstream produce through silencing apparatus respectively.
L
W＝A+Blgv+10lg?S (2)
L
W-pneumatic noise sound power level, dB (W);
A, B-characteristic constant calculate according to test data;
Wind speed between v-sheet, m/s;
S-silencing apparatus cross-sectional area, m
2
1.3, the pressure loss
The pressure loss of silencing apparatus can calculate according to formula (3):
Δ P-pressure loss, Pa;
ζ-resistance coefficient (based on wind speed between sheet);
Wind speed between v-sheet, m/s;
ρ-air density, kg/m
3
2, the performance comparison of silencing apparatus
Shown in Figure 13-1 and 13-2, be that the silencing apparatus of 6400 * 4800-2700 is an example with wide * height-length, the air quantity of the silencing apparatus of flowing through is 70m
3/ s.Characteristic parameter sees Table 1.
2.1, the contrast of sound deadening capacity
According to formula (1a), the sound deadening capacity that calculates two kinds of silencing apparatuss respectively sees Table 2, Figure 14.
2.2, the contrast of air-flow regenerated noise
The circulation ratio of strip-type silencer is 37%, and the circulation of array type silencer of the present invention ratio is 53%.The regenerated noise sound power level that produces through silencing apparatus according to formula (2) air-flow sees Table 3, Figure 15.Can see by table 3, compare that the pneumatic noise that array type silencer of the present invention produces is littler, more help guaranteeing the acoustic attenuation performance of silencing apparatus with strip-type silencer.
2.3, the contrast of the pressure loss
According to the laboratory test data, resistance coefficient ζ=0.463 of this silencing apparatus, the pressure loss value that calculates two kinds of silencing apparatuss according to formula (3) sees Table 4.
2.4, conclusion
To strip-type silencer and array type silencer, from sound deadening capacity, air-flow regenerated noise and three aspects of the pressure loss, carry out performance comparison as can be seen: compare with strip-type silencer, the sound deadening capacity of array type silencer increases, wind speed reduces between sheet, the air-flow regenerated noise reduces, and the pressure loss reduces, and the overall performance of silencing apparatus is improved.
Table 1 parameter comparison table (dB)
The sound deadening capacity contrast table (dB) of table 2 structure chip rear muffler
Table 3 silencing apparatus air-flow regenerated noise contrast table
The contrast table of table 4 pressure loss value
Claims (10)
1. an array type silencer is provided with sound absorbent in the body of silencing apparatus, it is characterized in that: described sound absorbent is a body, is provided with sound-absorbing material in the body, and the axis of body is arranged in parallel along airflow direction, and described body is fixedly mounted in the ventilation duct by support.
2. array type silencer according to claim 1 is characterized in that: described sound absorbent two ends are provided with the circular arc air guide sleeve, and sound absorbent is provided with perforated plate along the surface of body.
3. array type silencer according to claim 2 is characterized in that: described arrangement mode is a plurality of equilateral quadrilaterals or equilateral triangle.
4. array type silencer according to claim 3 is characterized in that: described sound absorbent cross section is circle or polygonal.
5. array type silencer according to claim 4 is characterized in that: described polygonal is triangle, quadrilateral, pentagon, Hexagon or Octagon.
6. array type silencer according to claim 5 is characterized in that: described polygonal is equilateral triangle, quadrilateral, pentagon, Hexagon or Octagon.
7. array type silencer according to claim 6 is characterized in that: described sound-absorbing material is filled in the sound absorbent.
8. array type silencer according to claim 7 is characterized in that: the sectional shape of described circular arc air guide sleeve is circle, triangle, quadrilateral, pentagon, Hexagon or Octagon.
9. array type silencer according to claim 8 is characterized in that: described perforated plate be shaped as circle or polygonal.
10. array type silencer according to claim 9 is characterized in that: described body section area is 40000～1x10
6Mm
2, long 300～10000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100663875A CN101275700B (en) | 2008-04-01 | 2008-04-01 | Array type silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100663875A CN101275700B (en) | 2008-04-01 | 2008-04-01 | Array type silencer |
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| Publication Number | Publication Date |
|---|---|
| CN101275700A true CN101275700A (en) | 2008-10-01 |
| CN101275700B CN101275700B (en) | 2011-10-05 |
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ID=39995396
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| US20100192616A1 (en) * | 2008-10-22 | 2010-08-05 | Ingo Gores | Air guiding element having a flow control element |
| CN102110442B (en) * | 2009-12-23 | 2012-06-27 | 华为技术有限公司 | Muffler device for single board zone of communication equipment |
| CN105556191A (en) * | 2013-10-31 | 2016-05-04 | 三菱日立电力系统株式会社 | Multistage pressure reduction device and boiler |
| CN107334421A (en) * | 2017-07-28 | 2017-11-10 | 江苏美的清洁电器股份有限公司 | Dustbin type dust catcher |
| CN107374503A (en) * | 2017-07-28 | 2017-11-24 | 江苏美的清洁电器股份有限公司 | Dustbin type dust catcher |
| CN107492369A (en) * | 2017-09-21 | 2017-12-19 | 北京天润康隆科技股份有限公司 | A kind of micropore rock beam series silencer |
| CN108039167A (en) * | 2018-01-16 | 2018-05-15 | 江苏华东正大空调设备有限公司 | A kind of array type silencer and its processing method |
| CN109903747A (en) * | 2019-03-27 | 2019-06-18 | 广东览讯科技开发有限公司 | A kind of butterfly-like silencer |
| CN109949788A (en) * | 2019-04-01 | 2019-06-28 | 广东览讯科技开发有限公司 | A kind of matrix form high efficiency silencer |
| CN111022381A (en) * | 2020-01-03 | 2020-04-17 | 宁波方太厨具有限公司 | Flow guide noise reduction device and range hood applying same |
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| US9039499B2 (en) * | 2008-10-22 | 2015-05-26 | Airbus Operations Gmbh | Air guiding element having a flow control element |
| US20100192616A1 (en) * | 2008-10-22 | 2010-08-05 | Ingo Gores | Air guiding element having a flow control element |
| CN102110442B (en) * | 2009-12-23 | 2012-06-27 | 华为技术有限公司 | Muffler device for single board zone of communication equipment |
| CN105556191A (en) * | 2013-10-31 | 2016-05-04 | 三菱日立电力系统株式会社 | Multistage pressure reduction device and boiler |
| CN107334421A (en) * | 2017-07-28 | 2017-11-10 | 江苏美的清洁电器股份有限公司 | Dustbin type dust catcher |
| CN107374503A (en) * | 2017-07-28 | 2017-11-24 | 江苏美的清洁电器股份有限公司 | Dustbin type dust catcher |
| CN107492369A (en) * | 2017-09-21 | 2017-12-19 | 北京天润康隆科技股份有限公司 | A kind of micropore rock beam series silencer |
| CN108039167A (en) * | 2018-01-16 | 2018-05-15 | 江苏华东正大空调设备有限公司 | A kind of array type silencer and its processing method |
| CN109903747A (en) * | 2019-03-27 | 2019-06-18 | 广东览讯科技开发有限公司 | A kind of butterfly-like silencer |
| CN109903747B (en) * | 2019-03-27 | 2024-02-06 | 广东览讯科技开发有限公司 | Butterfly-shaped muffler |
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| CN101275700B (en) | 2011-10-05 |
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Application publication date: 20081001 Assignee: SHENZHEN ZHONGYA MECHANIC & ELECTRIC INDUSTRY CO., LTD. Assignor: Fang Qingchuan|Li Qing Contract record no.: 2012440020296 Denomination of invention: Array type silencer Granted publication date: 20111005 License type: Exclusive License Record date: 20121119 |
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Application publication date: 20081001 Assignee: SICHUAN SANYUAN ENVIRONMENTAL GOVERNANCE CO., LTD. Assignor: Fang Qingchuan|Li Qing Contract record no.: 2018440020064 Denomination of invention: Array type silencer Granted publication date: 20111005 License type: Common License Record date: 20180709 Application publication date: 20081001 Assignee: BEIJING HENGJING HESHENG ENVIRONMENTAL PROTECTION CO., LTD. Assignor: Li Qing|Fang Qingchuan Contract record no.: 2018440020062 Denomination of invention: Array type silencer Granted publication date: 20111005 License type: Common License Record date: 20180709 Application publication date: 20081001 Assignee: Beijing Luchuang Acoustic Engineering Co., Ltd. Assignor: Fang Qingchuan|Li Qing Contract record no.: 2018440020063 Denomination of invention: Array type silencer Granted publication date: 20111005 License type: Common License Record date: 20180709 Application publication date: 20081001 Assignee: SICHUAN SANYUAN ENVIRONMENTAL GOVERNANCE CO., LTD. Assignor: Fang Qingchuan|Li Qing Contract record no.: 2018440020064 Denomination of invention: Array type silencer Granted publication date: 20111005 License type: Common License Record date: 20180709 Application publication date: 20081001 Assignee: BEIJING HENGJING HESHENG ENVIRONMENTAL PROTECTION CO., LTD. Assignor: Li Qing|Fang Qingchuan Contract record no.: 2018440020062 Denomination of invention: Array type silencer Granted publication date: 20111005 License type: Common License Record date: 20180709 Application publication date: 20081001 Assignee: Beijing Luchuang Acoustic Engineering Co., Ltd. Assignor: Fang Qingchuan|Li Qing Contract record no.: 2018440020063 Denomination of invention: Array type silencer Granted publication date: 20111005 License type: Common License Record date: 20180709 |
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