CN207526368U - A kind of ventilating sound-proof device - Google Patents
A kind of ventilating sound-proof device Download PDFInfo
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- CN207526368U CN207526368U CN201721581282.4U CN201721581282U CN207526368U CN 207526368 U CN207526368 U CN 207526368U CN 201721581282 U CN201721581282 U CN 201721581282U CN 207526368 U CN207526368 U CN 207526368U
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- sound
- noise elimination
- high frequency
- elimination cavity
- frequency noise
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Abstract
The utility model discloses a kind of ventilating sound-proof devices, and noise reduction ventilation device is provided on window, and noise reduction ventilation device includes the vent passages of unicom both outdoors and indoors, low frequency silencing apparatus and high frequency silencing apparatus are provided on vent passages；Silencing channel cover board is provided on Window for ventilation, high frequency silencing apparatus includes high frequency noise elimination cavity, and high frequency noise elimination cavity is arranged on silencing channel cover board.While realizing room big flow ventilation, the noise that external environment is passed to can be reduced；Especially less than 300Hz be not easy to decay, the low-frequency noise that penetrability is strong control effectively, realize low frequency radiation noise reduction；When closing window, 35 40dB of window entirety oise insulation factor reaches 4 grades of building doors and windows sound insulation property（GB/T8485‑2000）.
Description
Technical field
The utility model is related to a kind of energy conservation and environmental protection equipment field, more particularly to a kind of ventilating sound-proof device.
Background technology
Noise pollution, atmosphere pollution, water pollution are listed as city three major source of pollution.With China's rapid development of economy,
The high-grade Transportation Infrastructure Construction speed such as highway, high-speed railway is also to be getting faster, and more and more people live in groups
On traffic route side bustling with vehicles.The traffic noise problem that disturbs residents has become the protrusion environmental problem of 21st century, serious shadow
Ring people's work, studying and living.
It is a kind of preferable method to administer building noise using sound proof window at present, is compared especially for traffic noise effect
Significantly.But people open a window, the custom of ventilation can cause the sound insulation property of sound proof window directly to decline, therefore common sound proof window exists
The problem of " windowing is noisy dead, closes window and suppresses extremely ", although and using the passive noise reduction measure such as sound insulating structure or sound-absorbing material to middle and high
Frequency noise is more effective, but little to the control effect of low-frequency noise.
And sound proof window be typically it is closed, room air can because human activity discharge carbon dioxide and furniture volatilization
Benzene class aldehyde material and become dirty；Window, not only affected by noise, dust, sand and dust in air are opened, industrialization has poison gas
The linen-cotton suspended matters of the industries such as body, weaving, vehicle exhaust, the exhaust of various burners etc., will also enter so that body immunity therewith
Decline, reduce quality of life.
Now, the appearance of ventilated and soundproof window can solve the above problems to a certain extent, but ventilated and soundproof window is being handled
The noise levels such as site construction noise, railway, airport noise are more than 80-90dB（A）, noise energy concentrates on low frequency below 250
During noise, there is the problem of very big, it usually needs to sacrifice ventilation quantity as cost, bend number by increasing vent passages, subtract
The measures such as small air duct area come solve the problems, such as low-frequency noise insulate against sound, so as to greatly increase manufacture craft difficulty, cost of manufacture
It is high.
Utility model content
The goal of the invention of the utility model is：In view of the above problems, a kind of ventilating sound-proof device is provided, is solved
It ventilation of room and reduces noise and cannot solve the problems, such as simultaneously, environment institute band is reduced while solving room big flow ventilation
The noise come, solves the problems, such as that space air is ropy, solves the problems, such as room noise pollution.
The technical solution adopted in the utility model is as follows：
A kind of ventilating sound-proof device is provided with noise reduction ventilation device on window, and it is outdoor that noise reduction ventilation device includes unicom
With indoor vent passages, low frequency silencing apparatus and high frequency silencing apparatus are provided on vent passages；It is provided with and disappears on Window for ventilation
Sound passage cover plate, high frequency silencing apparatus include high frequency noise elimination cavity, and high frequency noise elimination cavity is arranged on silencing channel cover board.Silencing channel
Cover board is the support frame of whole equipment, realizes the support of vent passages and the isolation of indoor and outdoor surroundings.High frequency silencing apparatus is adopted
It is made of different row structure and sound-absorbing material, since the wavelength of high-frequency sound is short, good directionality, can be reflected by the object and absorb.
Further, the utility model discloses a kind of preferred structure of ventilating sound-proof device, on the high frequency noise elimination cavity
With being provided with air inlet on outdoor side, it is provided with to absorb noise and cross the noise elimination filter plate of air filtering on air inlet；
The side of high frequency noise elimination cavity is connected with low frequency noise elimination cavity by connector.Noise elimination filter plate can cross air filtering and foreign matter, prevent
Foreign matter enters ventilation shaft；Low frequency silencing apparatus is provided in low frequency noise elimination cavity, can be made an uproar using active silencing apparatus to low frequency
Sound carries out counteracting elimination, further reduces noise jamming.
Further, the silencer for eliminating low frequency noise is provided on the side wall of the low frequency noise elimination cavity, low frequency disappears
Audio collecting device is provided in the operatic tunes；Low frequency silencing apparatus includes main control platform, main control platform and audio collecting device signal
It is connected, the output terminal of main control platform is electrically connected with silencer.The collected voice signal of audio collecting device passes to master control and puts down
Platform, main control platform generate the sound that frequency is identical, amplitude is opposite after being handled, and two is superimposed, cancels out each other；It greatly reduces
Noise.
Further, the main control platform includes DSP control system, and the signal input part of DSP control system is connected with A/D
Conversion circuit；The output terminal connection pre-amplification circuit of audio collecting device, the output terminal of pre-amplification circuit are connected with anti-mix
Folded filter circuit, the output terminal of Anti-aliasing Filter Circuits are electrically connected with the input terminal of A/D conversion circuits；The letter of DSP control system
Number output terminal is connected with D/A conversion circuits, and the output terminal of D/A conversion circuits is connected with reconstruction filtering circuit, reconstruction filtering circuit
Output terminal be connected with voltage follower circuit, the output terminal of voltage follower circuit is connected with power amplification circuit, power amplification electricity
The output terminal on road is electrically connected with silencer.DSP control system is applicable in and continuously repeats the operation control task of processing, for active
The control of noise reduction, the sampling processing ability of high frequency can improve the upper limit in noise reduction broadband, and can improve the precision and effect of low frequency noise reduction
Rate.
Further, the side of the low frequency noise elimination cavity is connected with flexible steel in flat section tubing, and flexible steel in flat section tubing is connected with air outlet,
Air outlet is connected with interior；The audio collecting device includes sound transducer, microphone, one kind or several in sound pick-up
Kind；The silencer includes one or more of loud speaker, loudspeaker, sonic generator.
Further, the high frequency noise elimination cavity, air inlet, connector, low frequency noise elimination cavity, flexible steel in flat section tubing and air outlet it
Between junction be both provided with sealing rubber ring for sealing；Be provided with sound insulationg board in the high frequency noise elimination cavity, sound insulationg board it
Between be filled with sound-absorbing material.
The control flow of main control platform, includes the following steps：
1. measuring the noise of sound proof window working environment by audio collecting device, pass through the carry out frequency spectrum point of the noise of measurement
Analysis, obtains the main frequency of the frequency band and noise into room noise, determines the noise reduction frequency band of active noise reduction system；
2. pumping signal is done with the sine wave or white noise of corresponding frequency, using Normalized LMS Algorithm to corresponding frequency
Rate does secondary channel identification, obtains coefficient and the storage of the sef-adapting filter of secondary channel；
3. after accurate to secondary channel identification, the pumping signal for making secondary channel is closed, is controlled into ANC, DSP controls
The control situation that system is detected by error pick-up using Normalized LMS Algorithm, calculates the control letter of constant amplitude reverse phase
Number, and silencer is controlled to export.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. by setting the utility model, while realizing the ventilation of room big flow, can reduce that external environment is passed to makes an uproar
Sound；Especially less than 300Hz be not easy to decay, the low-frequency noise that penetrability is strong control effectively, realize low frequency radiation noise
Reduction；When closing window, window entirety oise insulation factor 35-40dB reaches 4 grades of building doors and windows sound insulation property（GB/T8485-
2000）.
2. the air quality in room can be improved, the environmental quality in room is improved, improves the quality of living environment.
Description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is the utility model schematic cross-sectional view；
Fig. 3 is main control platform structure diagram；
It is marked in figure：1 is silencing channel cover board, and 2 be high frequency noise elimination cavity, and 3 be air inlet, and 4 be noise elimination filter plate, and 5 be to connect
Device is connect, 6 be low frequency noise elimination cavity, and 7 be silencer, and 8 be flexible steel in flat section tubing, and 9 be air outlet.
Specific embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
As shown in Figure 1-Figure 3, the utility model includes silencing channel cover board 1, and silencing channel cover board 1 is added using stainless steel plate
Work forms；The high frequency noise elimination cavity 2 for absorbing high frequency noise is provided on silencing channel cover board 1, is provided in high frequency noise elimination cavity 2
Multilayer noise elimination partition board is filled with porous sound absorbing materials between partition board.High frequency noise elimination cavity 2 can absorb high frequency noise.High frequency noise elimination cavity 2
Air inlet 3 is provided on the side identical with external environment, noise elimination filter plate 4 is provided on air inlet 3, noise elimination filter plate 4 uses
Wire netting and filter cotton are overlapped.The foreign matter and prevent animal from entering in ventilation pipe that noise elimination filter plate 4 can be crossed in air filtering.
Since the linearity of high frequency noise is good, in the side of high frequency noise elimination cavity 2, the side not opposite with air inlet 3 is connected with
Connector 5, connector 5 are connected with low frequency noise elimination cavity 6；In low frequency noise elimination cavity 6, low frequency noise forms plane wave.Low frequency noise elimination cavity 6
Side be connected with flexible steel in flat section tubing 8, flexible steel in flat section tubing（8）Output terminal connection air outlet 9.
Low frequency noise elimination cavity（6）In be provided with audio collecting device and silencer 7, the output terminal of audio collecting device passes through electricity
Cable is connected with main control platform, and the output terminal of main control platform is connected by cable with silencer 7, and silencer is sound wave generating device.
Audio collecting device collects the low frequency signal in low frequency noise elimination cavity 6 and passes to main control platform, and main control platform is into after crossing processing
It is identical to generate frequency, the acoustic signals of opposite in phase；Main control platform emits the acoustic signals of generation by silencer 7,
Counteracting is overlapped mutually with former noise, realizes the elimination of noise.
When specifically used, air blown producer or extractor fan will be connected on the air inlet 3 of the present apparatus or air outlet 9, start air blast
Device or extractor fan can realize the cycle of air, and can reduce the extraneous noise being passed to by air duct.
Carrying out practically process when closing window, is acquired the noise of environment by audio collecting device, DSP controls
System carries out spectrum analysis to the noise of acquisition, obtains the characteristic of noise；DSP control system is according to the characteristic of the noise calculated
Calculate that noise sound wave amplitude is equal, acoustic signals of opposite in phase；DSP control system is sent out accordingly to corresponding sound source device
Signal, sound source device generates corresponding sound, and the sound of generation is realized after be superimposed with noise interferes cancellation, realization low-frequency noise
Elimination.High frequency noise elimination cavity 2 can realize the elimination of high-frequency sound, thoroughly solve that " windowing ventilation does not insulate against sound, divulge information and new in this way
Increase pollution " the problem of.
Embodiment 1：
On the basis of embodiment of above, the utility model discloses the preferred structure of main control platform, the master control is put down
Platform includes DSP control system, and the signal input part of DSP control system is connected with A/D conversion circuits；The output of audio collecting device
End connection pre-amplification circuit, the output terminal of pre-amplification circuit are connected with Anti-aliasing Filter Circuits, Anti-aliasing Filter Circuits
Output terminal is electrically connected with the input terminal of A/D conversion circuits；The signal output end of DSP control system is connected with D/A conversion circuits, D/
The output terminal of A conversion circuits is connected with reconstruction filtering circuit, and the output terminal of reconstruction filtering circuit is connected with voltage follower circuit, electricity
Pressure follows the output terminal of circuit to be connected with power amplification circuit, and the output terminal of power amplification circuit is electrically connected with silencer 7.It eliminates the noise
Device 7 is loud speaker.
The voice signal of local environment is converted into electric signal by audio collecting device, and the electric signal of generation is very small and weak and has
Signal-to-noise ratio is relatively low.Electric signal is passed to pre-amplification circuit by audio collecting device, and pre-amplification circuit can improve the letter of system
It makes an uproar and compares, reduce relative effect of the external interference to electric signal, and can realize impedance transformation and matching.Pre-amplification circuit is by telecommunications
Anti-aliasing Filter Circuits are inputed to after the amplification of number noise reduction, Anti-aliasing Filter Circuits pass after the signal other than design frequency is filtered out
A/D conversion circuits are passed, A/D conversion circuits sample the electric signal received according to preset frequency, and will receive
Analog signal be converted into digital signal；Digital signal is passed to DSP control system by A/D conversion circuits.DSP control system connects
It after receiving, is handled and generates identical with the sound frequency received, opposite in phase a signal, DSP control system will
It passes to D/A conversion circuits.The digital signal received is converted into analog signal and passes to reconstruct filter by D/A conversion circuits
Wave circuit, reconstruction filtering circuit can be adjusted band logical according to the demand of output, improve the signal-to-noise ratio of signal；Reconstruction filtering electricity
After signal is filtered on road, signal is passed into voltage follower circuit.Voltage follower circuit can reduce output impedance, improve output work
Rate, voltage follower circuit send a signal to power amplification circuit, and power amplification circuit passes to loud speaker after signal is amplified,
Loud speaker plays back sound.The sound that loud speaker plays out and former cancel with noise, substantially reduce noise.
Embodiment 2：
On the basis of embodiment 1, the control flow of main control platform is disclosed, is included the following steps：
1. measuring the noise of sound proof window working environment by audio collecting device, pass through the carry out frequency spectrum point of the noise of measurement
Analysis, obtains the main frequency of the frequency band and noise into room noise, determines the noise reduction frequency band of active noise reduction system；
2. pumping signal is done with the sine wave or white noise of corresponding frequency, using Normalized LMS Algorithm to corresponding frequency
Rate does secondary channel identification, obtains coefficient and the storage of the sef-adapting filter of secondary channel；
3. after accurate to secondary channel identification, the pumping signal for making secondary channel is closed, is controlled into ANC, DSP controls
The control situation that system is detected by error pick-up using Normalized LMS Algorithm, calculates the control letter of constant amplitude reverse phase
Number, and silencer 7 is controlled to export.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of ventilating sound-proof device, it is characterised in that：Noise reduction ventilation device is provided on window, noise reduction ventilation device includes
The vent passages of unicom both outdoors and indoors are provided with low frequency silencing apparatus and high frequency silencing apparatus on vent passages；On Window for ventilation
It is provided with silencing channel cover board（1）, high frequency silencing apparatus include high frequency noise elimination cavity（2）, high frequency noise elimination cavity（2）It is logical to be arranged on noise elimination
Road cover board（1）On.
2. a kind of ventilating sound-proof device as described in claim 1, it is characterised in that：The high frequency noise elimination cavity（2）It is upper and outdoor
Side on be provided with air inlet（3）, air inlet（3）On be provided with for absorb noise and cross air filtering noise elimination filter plate
（4）；High frequency noise elimination cavity（2）Side pass through connector（5）It is connected with low frequency noise elimination cavity（6）.
3. a kind of ventilating sound-proof device as claimed in claim 2, it is characterised in that：The low frequency noise elimination cavity（6）Side wall on
It is provided with the silencer for eliminating low frequency noise（7）, low frequency noise elimination cavity（6）Inside it is provided with audio collecting device；Low frequency is eliminated the noise
Device includes main control platform, and main control platform is connected with audio collecting device signal, the output terminal and silencer of main control platform（7）Electricity
Connection.
4. a kind of ventilating sound-proof device as claimed in claim 3, it is characterised in that：The main control platform includes DSP controls system
System, the signal input part of DSP control system are connected with A/D conversion circuits；The output terminal of audio collecting device connects preposition amplification
Circuit, the output terminal of pre-amplification circuit are connected with Anti-aliasing Filter Circuits, and output terminal and the A/D of Anti-aliasing Filter Circuits are converted
The input terminal electrical connection of circuit；The signal output end of DSP control system is connected with D/A conversion circuits, the output of D/A conversion circuits
End is connected with reconstruction filtering circuit, and the output terminal of reconstruction filtering circuit is connected with voltage follower circuit, voltage follower circuit it is defeated
Outlet is connected with power amplification circuit, the output terminal and silencer of power amplification circuit（7）Electrical connection.
5. a kind of ventilating sound-proof device as described in claim 3 or 4, it is characterised in that：The low frequency noise elimination cavity（6）Side
It is connected with flexible steel in flat section tubing（8）, flexible steel in flat section tubing（8）It is connected with air outlet（9）, air outlet（9）It is connected with interior；The sound
Frequency harvester includes one or more of sound transducer, microphone, sound pick-up；The silencer（7）Including loud speaker,
One or more of loudspeaker, sonic generator.
6. a kind of ventilating sound-proof device as claimed in claim 5, it is characterised in that：The high frequency noise elimination cavity（2）, air inlet
（3）, connector（5）, low frequency noise elimination cavity（6）, flexible steel in flat section tubing（8）And air outlet（9）Between junction be both provided with and be used for
The sealing rubber ring of sealing；The high frequency noise elimination cavity（2）Sound insulationg board is inside provided with, sound-absorbing material is filled between sound insulationg board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721581282.4U CN207526368U (en) | 2017-11-23 | 2017-11-23 | A kind of ventilating sound-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721581282.4U CN207526368U (en) | 2017-11-23 | 2017-11-23 | A kind of ventilating sound-proof device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207526368U true CN207526368U (en) | 2018-06-22 |
Family
ID=62580348
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721581282.4U Expired - Fee Related CN207526368U (en) | 2017-11-23 | 2017-11-23 | A kind of ventilating sound-proof device |
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| CN (1) | CN207526368U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882487A (en) * | 2017-11-23 | 2018-04-06 | 四川三元环境治理股份有限公司 | A kind of ventilating sound-proof device |
-
2017
- 2017-11-23 CN CN201721581282.4U patent/CN207526368U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882487A (en) * | 2017-11-23 | 2018-04-06 | 四川三元环境治理股份有限公司 | A kind of ventilating sound-proof device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180622 Termination date: 20211123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |