CN106015818B - A kind of energy-saving silencing pipeline - Google Patents
A kind of energy-saving silencing pipeline Download PDFInfo
- Publication number
- CN106015818B CN106015818B CN201610530255.8A CN201610530255A CN106015818B CN 106015818 B CN106015818 B CN 106015818B CN 201610530255 A CN201610530255 A CN 201610530255A CN 106015818 B CN106015818 B CN 106015818B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- energy
- pipe
- pipeline group
- saving
- 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
- 230000030279 gene silencing Effects 0.000 title claims abstract description 29
- 230000000644 propagated effect Effects 0.000 claims abstract description 7
- 230000007480 spreading Effects 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 21
- 230000008030 elimination Effects 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 11
- 230000006641 stabilisation Effects 0.000 abstract description 7
- 238000011105 stabilization Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 description 17
- 238000013016 damping Methods 0.000 description 9
- 238000004134 energy conservation Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 7
- 239000011358 absorbing material Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 6
- 238000005273 aeration Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000003584 silencer Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000001976 improved effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013475 authorization Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Duct Arrangements (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a kind of energy-saving silencing pipelines, including entrance, pipe main body and pipe outlet；Wherein part of the pipe main body between entrance and pipe outlet, pipe main body include one or more pipeline group, and pipeline group is made of two independent laterals；Two laterals of the sound wave after entering pipeline group along the pipeline group are divided into different paths and are propagated, the odd-multiple that finally phase difference of the sound wave of two laterals outflow is when spreading out of the pipeline group and being converged.The principle that the present invention is offset using sound wave interference will dexterously eliminate the noise and be unified well with current stabilization, not only play good noise elimination effect, but also play the role of energy saving current stabilization.
Description
Technical field
The technology of the present invention is related to a kind of energy-saving silencing pipeline, belongs to smeltery, oil plant, coal-burning power plant's heat-exchange system, sky
The energy saving ventilation system of tune and other field.
Background technique
Smeltery, oil plant, coal-burning power plant's heat-exchange system, air-conditioning system and other ventilating systems fan operation when generate
Noise in addition to a part is transmitted to surrounding space environment by blower and tube wall, there are also most of noises along pipe-line system biography
It broadcasts, free surrounding space is radiated by pipeline air inlet.Meanwhile in pipe-line system air-flow flow caused by quadratic noise also by
Both the above approach is radiated surrounding space.Two parts noise to the work and life of periphery personnel can all generate it is biggish not
Benefit influences.
Efficiently, energy conservation is always the design object that ventiduct system is pursued, and pipeline flow field characteristic is this mesh
Target key influence factor.Flow velocity and pressure distribution will reduce drafting efficiency, increase equipment running resistance in non-uniform pipeline,
And these are unreasonable caused often caused by pipe design parameter.In ventilation shaft design, flow field of the air-flow in pipeline
Extremely complex, especially in pipe bent position, the speed and pressure of gas all occur significantly to change, and generate turbulent flow, are to cause pipeline pressure
The main reason for power is lost, while also easily causing higher reproduced air-flow noise and vibration.
At present for the noise abatement of ventiduct system, the general sound insulation processing using blower and its pipeline；Pipeline into
The measures such as air-inlet sound eliminator are arranged in air port.The sound insulation of blower and its pipe-line system is handled, and can reduce noise in blower and pipeline
Direct out the noisiness of radiation；Pipe-line system air inlet installs silencer additional, can reduce blower and pneumatic noise is outside along pipeline
The noisiness of radiation.But the improvement that both the above noise abatement measure flows generated low-frequency noise for blower and air-flow is imitated
Fruit is poor, and especially under Wind Volume, conditions of high flow rate, the acoustic attenuation performance decline of air-inlet sound eliminator is even lost.Meanwhile pipeline into
The pressure loss of wind silencer is often several times even tens times of ventilation shaft itself pressure loss, after installing air-inlet sound eliminator additional
The aeration resistance of pipeline is largely increased, under the requirement of identical air quantity, increases blower input power, and make energy consumption
Increase.
In the case where harsh energy-saving and emission-reduction pressure and environmental noise abatement require, there is energy conservation and the bend pipe from acoustic attenuation performance,
The developing direction of the technology will be become.
Authorized announcement date is on 09 30th, 2014, and Authorization Notice No. is disclosure in the Chinese patent of CN204164042U
A kind of discharge bend muffler for 35kV transformer chamber, installation go out with the wall type axial flow blower on 35KV main transformer chamber outer wall
At air port, ventilation cavity including shell and in shell, ventilation cavity is in being respectively equipped with air intake vent and go out on the shell
The center line in air port, ventilation cavity air intake vent is overlapped with the center line of locular wall formula axial flow blower, further includes being set on shell
And be located at the stainless steel cloth at air outlet and be set to the anechoic sheet for extending along direction extension at ventilation cavity center, it eliminates the noise
The wind inlet end of piece is equipped with conical flow guiding part, and gap is equipped between the top of the conical flow guiding part and the locating plane of air intake vent,
Planes align locating for the other end and air outlet of anechoic sheet.The whole sound deadening capacity that the technology of the present invention discharges bend muffler is higher,
3dB (A) or more can be improved compared with the prior art, and have better noise elimination effect at the crest frequency of 35kV transformer noise.It should
Bend muffler achievees the purpose that noise elimination in such a way that resistive sound-absorbing material forms silencing channel, but its noise elimination frequency band mainly for
Medium-high frequency, according to the structure type in its channel, the sound deadening capacity in channel is lower and environmental suitability is poor.Simultaneously because inner wall of the pipe
It is filled with sound-absorbing material, relatively increases the resistance of bend pipe, and volume is larger.
Authorized announcement date is on 09 26th, 2011, and Authorization Notice No. is disclosure in the Chinese patent of CN202248777U
A kind of energy-saving elbow structure of thermal power plant flue gas system, including siding, reinforcing rib, it is characterised in that: siding composition four
The continuous road body in face, central axial along air-flow in road body and connection two side wall panels are equipped with aerofoil profile guiding device.The energy conservation is curved
Head improves its interior flow field with biggish positive effect, but only improve in terms of noise-and-vibration-reduction for reducing pipeline crushing
Turbulent condition in pipeline reduces quadratic noise and vibration caused by turbulent air flow, and there is no noise elimination energy for elbow itself
Power.
Summary of the invention
The first purpose of the technology of the present invention is to provide a kind of Novel silencing energy saving pipeline, and the bend pipe structure is simple, does not need
Adding any sound-absorbing material can be realized preferable noise elimination effect, and environmental suitability is strong, and it can be carried out according to specific frequency
Design, there is higher design frequency band acoustic characteristics.For pipe-line systems such as smeltery, oil plant, coal-burning power plant's heat exchange, can remove
Original pipeline silencer reduces voltage loss.
In conjunction with the flow field in pipeline when the second purpose of the technology of the present invention is the interference noise elimination lateral design of bend pipe each group
Characteristic makes each group lateral realize there is stream, current stabilization effect while noise elimination, and then improves pipe-line system interior flow field
Characteristic reduces pipeline flow resistance, realizes energy conservation.
The third object of the present invention is to improve the turbulent shape of pipeline interior air-flow by the adjustment effect of energy-saving silencing pipeline
State reduces air-flow and flows caused secondary gas flow noise, while reducing the vibration that turbulent air flow is induced.
Technical scheme is as follows:
A kind of energy-saving silencing pipeline, including entrance, pipe main body and pipe outlet；Wherein pipe main body enters for pipeline
Part between mouth and pipe outlet, pipe main body includes one or more pipeline group, and pipeline group is independent by two
Lateral composition；Two laterals of the sound wave after entering pipeline group along the pipeline group are divided into different paths and are propagated,
The finally odd-multiple that the phase difference of the sound wave of two laterals outflow is π when spreading out of the pipeline group and being converged.
The energy-saving silencing pipeline, the number of pipeline group and the acoustic pressure extreme value in acoustic pressure spectrum curve at entrance
Number is identical.
The energy-saving silencing pipeline, the continuous passage that lateral is made of muti-piece siding.
Connecting component is provided on the energy-saving silencing pipeline, entrance and pipe outlet.
The energy-saving silencing pipeline, which is characterized in that connecting component is flange.
Energy-saving silencing pipeline provided by the invention, the pipeline configuration is simple, and not needing to add any sound-absorbing material can be real
Existing higher noise elimination effect, environmental suitability are strong.Energy-saving silencing pipeline improves pipeline inside stream while realizing duct attenuation
Field characteristic reduces aeration resistance and realizes energy conservation, while reducing the flowing of pipeline interior air-flow caused quadratic noise and vibration.
Energy-saving silencing pipeline provided by the invention is based on lateral along the central axial length of air-flow according to bend pipe noise
Acoustic pressure extreme frequencies (offsetting frequency) design of inlet, has haved the function that eliminate the noise, while utilizing branch by sound wave interference
Sound wave and airflow diversion are played the role of eliminating eddy flow, have further reached steady flow result by pipeline.
The technology of the present invention is related to multiple working principles, specific as follows:
Working principle one: the noise that fan operation generates is propagated along pipe-line system, is entered in each group interference noise elimination lateral
Mouth is divided into two column, and sound wave, which is propagated to export in lateral after different distance in two laterals, generates interference phenomenon, if two arrange
The amplitude of sound wave is identical, and in the area of space for the odd-multiple that phase difference is π, two column sound waves will cancel out each other.
Working principle two: flow field of the air-flow in pipeline is extremely complex, especially in pipe bent position, the speed and pressure of air-flow
Significant change will occur, biggish barometric gradient and speed difference occur, generate turbulence pulsation and act on and be accompanied by depositing for maelstrom
The aeration resistance of pipeline is being increased, biggish quadratic noise and easy induced vibration are generated.Energy-saving silencing pipeline each group branched pipe
Road can improve pipeline flow field by certain current balance function, turbulent flow phenomenon be eliminated, so that manifold pressure and velocity flow profile are opposite
Uniformly, the aeration resistance of pipeline is reduced, realizes energy conservation.With the improvement of pipeline flow field, the turbulent flow of air-flow, panting action drop
Low, the secondary recycling and vibration that air-flow velocity is induced also weaken therewith.
Working principle three: it is smaller that pipeline interferes noise elimination to be influenced by air velocity, and due to not using any sound-absorbing material,
Therefore structure is relatively easy, and small in size, environmental suitability is stronger, and avoiding in traditional noise reduction schemes makes because installing silencing apparatus additional
The problem of voltage loss increases is obtained, energy saving is greatly improved.
The present invention has the beneficial effect that compared with prior art:
1, energy-saving damping inner wall of the pipe, which does not need to add any sound-absorbing material i.e., can reach higher acoustic attenuation performance, structure letter
It is single, small in size, strong environmental adaptability, and influenced by air-flow small.
2, in energy-saving damping pipeline each group interference noise elimination lateral application interference noise-cancelling theory, can according to specific frequency into
Row design has preferable design frequency band acoustic characteristics.
3, the design of each group interference noise elimination pipeline of energy-saving damping pipeline, using being respectively in charge of while reaching noise elimination effect
Airflow diversion is improved pipeline interior flow field by road, reduces aeration resistance, realizes energy conservation.
4, each group interference noise elimination pipeline is combined, and improves pipeline interior flow field, is played the role of flowing current stabilization, be reduced
The secondary gas flow noise induced by turbulent air flow and vibration.
5, the technology of the present invention realizes the unification of duct attenuation noise reduction and energy-saving vibration-reduction for the first time.
6, the technology of the present invention realizes the not design method according to conventional muffler for the first time, realizes ventilating noise-elimination, improves logical
The service life of air piping.
Energy-saving damping pipeline provided by the invention creatively devises lateral with the principle that interference is eliminated the noise and reaches
Noise elimination effect, while again having haved the function that energy saving current stabilization on the basis of noise elimination using the design of lateral, will eliminate the noise with
Current stabilization is dexterously unified.The configuration of the present invention is simple effect is obvious, can fully achieve the effect for reaching steady flow condition while noise elimination
Fruit.
Detailed description of the invention
Fig. 1 is energy-saving silencing piping schematic described in the embodiment of the present invention 1；
Fig. 2 is energy-saving silencing pipe branch pipe design schematic diagram described in the embodiment of the present invention 1；
Fig. 3 is energy-saving silencing piping schematic described in the embodiment of the present invention 2；
Fig. 4 is energy-saving silencing piping schematic described in the embodiment of the present invention 3；
In figure 1 above, Fig. 3 and Fig. 4,1 is entrance, and 2 be pipe main body, and 21 be first pipe group, and 22 be the second pipe
Road group, 3 be pipe outlet, and 4 be connecting component.
Specific embodiment:
Energy-saving silencing pipeline provided by the invention is further described below in conjunction with attached drawing.
Embodiment 1
As shown in Figure 1, be energy-saving silencing piping schematic provided by the invention, including entrance 1, pipe main body 2 with
Pipe outlet 3；Wherein part of the pipe main body 2 between entrance 1 and pipe outlet 3, pipe main body 2 include a pipeline
Group, pipeline group are made of two independent laterals；Sound wave is after entering pipeline group along two each laterals of the pipeline group
It is divided into different paths to be propagated, the phase for the sound wave that finally two laterals are spread out of when spreading out of the pipeline group and being converged
Difference is the odd-multiple of π.The design principle of the present embodiment is as follows:
As parallel branch pipeline is arranged in Fig. 2 pipeline group.If the length of two laterals is respectively l1And l2, pipeline section
Product isIncident acoustic wave is punished in branch point A into two-way, propagates l respectively1And l2Afterwards, converge at branch point B.If sound
The difference for propagating distance is equal to the odd-multiple of half-wavelength, i.e.,
So the phase difference of two sound waves be π odd-multiple, therefore B place superposition after will cancel out each other.Remember corresponding frequency
For fn, i.e.,
It follows that being f for frequencynSound wave, cannot be blazed abroad by this lateral, this frequency is supporting
Disappear frequency.
Embodiment 2
It is the improvement on the basis of embodiment 1 as shown in figure 3, being energy-saving silencing piping schematic provided in this embodiment,
Wherein the corner of lateral is cambered design, is further conducive to steady flow condition, plays energy-conserving action；Entrance and pipe
Road is provided with connecting component 4 in outlet, which is connecting flange, and the connection for further facilitating pipeline and other equipment is answered
With.
Embodiment 3
Using energy-saving damping pipe applications provided by the invention in power plant's ventilating system, and it is mounted on fan wind inleting tube road system
System plays energy-saving silencing effect.Through in-site measurement, two sound involved in the installation place sound pressure frequency response curve of energy-saving damping pipeline
Crest frequency is pressed, therefore it includes two groups of pipeline groups, respectively 21 He of first pipe group that the energy-saving silencing pipeline is (as shown in Figure 4)
Second pipe group 22, each pipeline group correspond to a peak sound pressure frequency, and wherein first pipe group 21 is using 230Hz as counteracting
Frequency, second pipe group 22 is using 460Hz as counteracting frequency.The continuous passage that each lateral is made of muti-piece siding, respectively
Component branch pipe(tube) has certain radian and inclination angle.
When energy-saving damping pipeline work, by blower direction be propagated through Lai noise, from each group interference noise elimination lateral enter
Mouth is divided into two column sound waves, interferes negative function in noise exit after the lateral of each pipeline group, frequency is offset in design
Noise at rate will be completely counterbalanced by, and realize the noise elimination noise reduction of pipeline.Air-flow flows into each lateral, equal due to each lateral
Stream effect, avoids the occurrence of the unfavorable flow field defects such as vortex, so that flow velocity and pressure are evenly distributed in pipeline, reduces flow resistance,
Quadratic noise and the vibration for reducing the initiation of air-flow current stabilization, realize energy conservation and vibration damping.
Noise reduction of its in the present embodiment at 230 and 460Hz is respectively 17.8dB and 18dB, and pipeline sound transmission loss is about
20dB, an alternative common dissipative muffler.In energy-saving damping pipeline access conduit system, under design conditions, pipeline sheet
The body pressure loss reduces half, compares the pipe-line system containing silencer, amount of energy saving is about 15%.
Claims (4)
1. a kind of energy-saving silencing pipeline, including entrance, pipe main body and pipe outlet；Wherein pipe main body is entrance
Part between pipe outlet, which is characterized in that pipe main body includes one or more pipeline group, and pipeline group is by two
A independent lateral composition；Sound wave enter pipeline group after along the pipeline group two laterals be divided into different paths into
Row is propagated, the odd-multiple that finally phase difference of the sound wave of two laterals outflow is π when spreading out of the pipeline group and being converged；
The number of pipeline group is identical as the acoustic pressure extreme value number at entrance in acoustic pressure spectrum curve.
2. energy-saving silencing pipeline according to claim 1, which is characterized in that the company that lateral is made of muti-piece siding
Continuous channel.
3. energy-saving silencing pipeline according to claim 1, which is characterized in that the company of being provided on entrance and pipe outlet
Relay part.
4. energy-saving silencing pipeline according to claim 3, which is characterized in that connecting component is flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530255.8A CN106015818B (en) | 2016-07-06 | 2016-07-06 | A kind of energy-saving silencing pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530255.8A CN106015818B (en) | 2016-07-06 | 2016-07-06 | A kind of energy-saving silencing pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106015818A CN106015818A (en) | 2016-10-12 |
| CN106015818B true CN106015818B (en) | 2018-12-25 |
Family
ID=57108064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610530255.8A Active CN106015818B (en) | 2016-07-06 | 2016-07-06 | A kind of energy-saving silencing pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106015818B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352516B (en) * | 2016-10-31 | 2022-06-17 | 珠海格力电器股份有限公司 | Variable air volume terminal and air conditioner |
| CN107631106A (en) * | 2017-08-24 | 2018-01-26 | 江西泰豪军工集团有限公司 | Discharge duct and its sound reduction method |
| CN107761620B (en) * | 2017-10-24 | 2023-05-30 | 江苏徐工国重实验室科技有限公司 | Air duct piece and road cleaning vehicle |
| CN109341052B (en) * | 2018-10-18 | 2020-09-11 | 广东美的制冷设备有限公司 | Silencer for air conditioner and air conditioner |
| CN110978942A (en) * | 2019-11-04 | 2020-04-10 | 珠海格力电器股份有限公司 | A evaporation fan and passenger train air conditioning system for passenger train |
| CN110944078B (en) * | 2019-11-29 | 2021-07-06 | 维沃移动通信有限公司 | Electronic device |
| CN111426045A (en) * | 2020-02-28 | 2020-07-17 | 青岛海尔空调电子有限公司 | Noise reduction air duct assembly for air duct machine and design method thereof |
| CN112503024A (en) * | 2020-11-02 | 2021-03-16 | 北京朗新明环保科技有限公司南京分公司 | Energy-saving and comprehensive noise-reducing fan pipeline and transformation method |
| CN114664280A (en) * | 2022-03-19 | 2022-06-24 | 深圳市科德声学技术有限公司 | Self-resistance type interference noise elimination equipment |
| WO2024090085A1 (en) * | 2022-10-28 | 2024-05-02 | 富士フイルム株式会社 | Sound mitigation structure |
| CN118602205B (en) * | 2024-08-07 | 2024-10-01 | 苏州市群卿汽车零部件有限公司 | A pipeline shock-absorbing bracket and a noise reduction structure for an air duct of an automobile air conditioning system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1070903A1 (en) * | 1999-07-22 | 2001-01-24 | Peugeot Citroen Automobiles SA | Device for attenuating noise in a pipe carrying gas |
| WO2007137720A1 (en) * | 2006-05-30 | 2007-12-06 | Rehau Ag + Co | Molded part for conduit systems for conveying waste water |
| CN102759185A (en) * | 2011-04-29 | 2012-10-31 | 通用汽车环球科技运作有限责任公司 | Noise silencer |
| CN103115215A (en) * | 2013-03-14 | 2013-05-22 | 吴静 | Noise reduction type smoke discharge pipe |
| CN105927816A (en) * | 2016-05-25 | 2016-09-07 | 徐敏锋 | Air conduit device with active noise reduction function and noise reduction method |
| CN205824469U (en) * | 2016-07-06 | 2016-12-21 | 南京常荣声学股份有限公司 | A kind of energy-saving silencing pipeline |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081148A2 (en) * | 2009-01-12 | 2010-07-15 | Optimum Power Technology L.P. | Apparatuses, systems, and methods for improved performance of a pressurized system |
-
2016
- 2016-07-06 CN CN201610530255.8A patent/CN106015818B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1070903A1 (en) * | 1999-07-22 | 2001-01-24 | Peugeot Citroen Automobiles SA | Device for attenuating noise in a pipe carrying gas |
| WO2007137720A1 (en) * | 2006-05-30 | 2007-12-06 | Rehau Ag + Co | Molded part for conduit systems for conveying waste water |
| CN102759185A (en) * | 2011-04-29 | 2012-10-31 | 通用汽车环球科技运作有限责任公司 | Noise silencer |
| CN103115215A (en) * | 2013-03-14 | 2013-05-22 | 吴静 | Noise reduction type smoke discharge pipe |
| CN105927816A (en) * | 2016-05-25 | 2016-09-07 | 徐敏锋 | Air conduit device with active noise reduction function and noise reduction method |
| CN205824469U (en) * | 2016-07-06 | 2016-12-21 | 南京常荣声学股份有限公司 | A kind of energy-saving silencing pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106015818A (en) | 2016-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106015818B (en) | A kind of energy-saving silencing pipeline | |
| CN112503024A (en) | Energy-saving and comprehensive noise-reducing fan pipeline and transformation method | |
| JP2011140949A (en) | Vane type silencer in elbow for gas turbine | |
| CN212903808U (en) | Ejector and wind tunnel test device with same | |
| CN109533264B (en) | A spiral flow channel variable air volume marine air distributor | |
| CN212624783U (en) | Silencing sheet, silencing device and acoustic wind tunnel device | |
| CN110925240A (en) | A centrifugal fan with adjustable frequency and noise reduction and its volute | |
| CN110715436A (en) | Impedance type silencing static pressure box | |
| CN205824469U (en) | A kind of energy-saving silencing pipeline | |
| CN113153817B (en) | Ventilating duct comprehensive noise reduction and elimination structure | |
| CN205425339U (en) | Air conditioner duct attenuation system | |
| CN103727075B (en) | A kind of impedance-compensated composite muffler of modular | |
| CN207122704U (en) | A kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top | |
| CN206408985U (en) | A kind of noise reduction room for generator | |
| CN111022373A (en) | Converter silencing air duct system and method for reducing low-frequency noise | |
| CN206668560U (en) | Silencer and compressor | |
| CN207935603U (en) | A kind of smoke discharging pipe silencing apparatus | |
| CN215597743U (en) | Silencer and silencing device | |
| CN105241050A (en) | Multi-cavity silencer of air conditioner | |
| CN204783177U (en) | Diesel generating set silencer of discharging fume | |
| CN111489727B (en) | A sound-absorbing sheet | |
| CN202284702U (en) | Fuel gas pipeline silencer | |
| CN104820732A (en) | Noise optimization method for engine intake system | |
| CN2221742Y (en) | Pipe-wide band muffler | |
| CN113153825A (en) | A silencing device and fan for fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |