CN107166458A - A kind of lampblack absorber of active active noise reduction - Google Patents
A kind of lampblack absorber of active active noise reduction Download PDFInfo
- Publication number
- CN107166458A CN107166458A CN201710271106.9A CN201710271106A CN107166458A CN 107166458 A CN107166458 A CN 107166458A CN 201710271106 A CN201710271106 A CN 201710271106A CN 107166458 A CN107166458 A CN 107166458A
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- Prior art keywords
- acoustical generator
- sound
- high frequency
- lampblack absorber
- active
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 32
- 239000006233 lamp black Substances 0.000 title claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 claims abstract description 40
- 239000000779 smoke Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000001228 spectrum Methods 0.000 abstract description 7
- 230000003595 spectral effect Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 206010068052 Mosaicism Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 241000894007 species Species 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present invention relates to a kind of lampblack absorber of active active noise reduction, including acoustic device, sound-producing device are adopted, described adopts the left and right sides that acoustic device is distributed in range hood fan, and sound-producing device is integrated in the lower section left and right sides of range hood fan；Described acoustic device of adopting is constituted by adopting acoustic device inner chamber, high frequency broadband noise sound absorption sponge and reference sensor；Described sound-producing device is made up of acoustical generator inner chamber, acoustical generator cover plate, acoustical generator high frequency sound absorption sponge and loudspeaker horn；Intracavitary is placed with ANC signals control acoustical generator, ANC signals control acoustical generator and reference sensor wired connection in the acoustical generator of described sound-producing device, and ANC signals control acoustical generator passes through D/A transform modes and loudspeaker horn wired connection；The present invention can effectively remove line spectrum noise in noise with low-frequency broadband noise, improve the sound quality of lampblack absorber.
Description
Technical field
The invention belongs to lampblack absorber technical field, more particularly to a kind of lampblack absorber of active active noise reduction.
Background technology
The noise of lampblack absorber is caused by the operation and its vibration of blower fan, and wherein noise caused by blower fan has linear spectral and width
Characteristic with noise, for the noise of linear spectral, active active noise reduction is the only effective processing scheme.In addition, in sound
In terms of subjective feeling, the processing to linear spectral noise can improve the sound quality of noise of range hood.It is existing for lampblack absorber
Active active noise reduction scheme, simply elaborates general principle with structure chart, not deep consideration is during noise reduction process
The linear general interference problem with broadband noise, such as patent《Near-suction type oil smoke suction machine active noise reducing device and application have the device
Noise-reduction method》.Based on this, the active active noise reduction is designed, the active active noise reduction is primarily directed to low-frequency noise and frequency spectrum
In distribution it is linear it is general handled, carry out active noise elimination during, active active noise reduction is in continuous wideband noise reduction algorithm
Difficulty is realized, effect is not also obvious, it is to avoid noise elimination of the broadband noise on linear spectral noise in noise source in acoustical generator influences, and keeps away
Exempt from reference sensor and receive reception influence of the sound middle width strip noise on linear spectral, therefore to the reality of the active active noise reduction scheme
It is a kind of effective noise reduction schemes for eliminating low frequency and linear spectral in noise based on being drawn up to the broadband noise in noise to apply.
It is the effective ways for improving lampblack absorber sound quality.Active active noise reduction is to use anti-audio technology in the patent, in active vibration
In anti-audio technology and its eliminate influence of the wideband spectrum to linear spectral, be also among protection domain.
In to the existing noise reduction measure of lampblack absorber, the optimization to noise source of generation blower fan is concentrated mainly on and using passive
The continuous two methods of sound absorption, noise, in the case where not influenceing fan performance, noise reduction limitation, for using are handled from blower fan
Sound absorption is continuous, for the wideband spectrum such as high frequency effect substantially, and low frequency and linear spectral noise, occupies in noise of range hood spectrum distribution
Greatly, thus the processing to noise herein is, it is necessary to using active reduction method.In addition, for existing in lampblack absorber
In the scheme of upper use active active noise reduction, the problem that interferes of linear spectral and broadband noise is not accounted for completely, and by
Have oil smoke generation in lampblack absorber use environment, do not account for how protecting yet reference microphone in active noise reduction, resonant cavity and
The fume pollution problem of generator.
The content of the invention
It is an object of the invention to overcome the shortcomings of that prior art is present, and provide a kind of oil smoke of active active noise reduction
Machine, can effectively remove the line spectrum noise in noise with low-frequency broadband noise, improve the sound quality of lampblack absorber.
The purpose of the present invention is completed by following technical solution, including lampblack absorber main body, adopt acoustic device, sounding dress
Put, control device, described lampblack absorber main body, including body and the blower fan in body；Described adopts acoustic device located at institute
State in body, it includes high frequency broadband noise sound absorption sponge and reference sensor, described high frequency broadband noise sound absorption sponge position
Between the blower fan and reference sensor；Described sound-producing device is in the body, and it includes the sound absorption of acoustical generator high frequency
Sponge and loudspeaker horn, described acoustical generator high frequency sound absorption sponge are located between the blower fan and loudspeaker horn；Described control
Device respectively with reference sensor and loudspeaker horn Electricity Federation, it controls loudspeaker of raising one's voice by receiving the signal that reference sensor is transmitted
Sounding, to offset the low frequency noise of blower fan.
Preferably, the described high frequency range adopted the left and right sides that acoustic device is distributed in range hood fan, adopt in acoustic device
Band noise sound absorption sponge is embedded in and adopted in acoustic device inner chamber, reference sensor be located at behind high frequency broadband noise sound absorption sponge with
Dorsad between the panel of blower fan side.
Preferably, described acoustic device of adopting is towards offering for preventing oil smoke to high frequency range on the panel of blower fan side
The panel sealing of the first aperture, dorsad blower fan side with noise sound absorption sponge pollution.
Preferably, described sound-producing device is integrated in the hair in the lower section left and right sides of range hood fan, sound-producing device
Sound device high frequency sound absorption sponge is placed between acoustical generator cover plate and acoustical generator inner chamber, is put simultaneously in the ghost of the acoustical generator inner chamber
Acoustical generator high frequency sound absorption sponge is equipped with, loudspeaker horn is placed on the acoustical generator loudspeaker installation site that acoustical generator inner chamber both sides are provided with
Place is simultaneously located at after acoustical generator high frequency sound absorption sponge.
Preferably, described control device, which includes ANC signals, controls acoustical generator, ANC signals control acoustical generator and ginseng
Sensor wired connection is examined, ANC signals control acoustical generator passes through D/A transform modes and loudspeaker horn wired connection.
Preferably, described ANC signals control acoustical generator is located at intracavitary in the acoustical generator of sound-producing device.
It is used for preventing oil smoke from inhaling acoustical generator high frequency preferably, the both sides of described acoustical generator cover plate offer several
The second orifice of sound sponge pollution.
Preferably, the volume of described acoustical generator inner chamber is more than or equal to 1500cm3。
Beneficial effects of the present invention are：From practical angle, it is considered to which linear spectral and broadband in noise of range hood are made an uproar
Sound is interfered and wideband ANC (active active noise reduction) algorithm constantly sex chromosome mosaicism, is dropped mainly for low frequency and linear spectral
Make an uproar, it is therefore an objective to improve the sound quality of lampblack absorber, secondly, the reference sensor that uses of the present invention be it is a set of adopt acoustic device, the dress
Influence of the oil smoke to parts in device can effectively be prevented, in the systems approach with the broadband noise in filter high-frequency by putting
In, the generating means of inverted waveform is produced nor a simple loudspeaker horn, but the sound-producing device of resonant cavity is carried,
The device has filtered the broadband noise in loudspeaker horn generation sound high frequency, only retains the linear spectral in low frequency and high frequency；Using
Such device, it is effective solve in sound field reversely broadband noise and the interference problem of the linear sound field of source sound field, it is to avoid wideband
The ANC system constantly bad system instability caused of property.
Brief description of the drawings
Fig. 1 is the system installation structure schematic diagram of the present invention.
Fig. 2 is the sound-producing device structural representation of the present invention.
Fig. 3 be the present invention adopt acoustic device structural representation.
Fig. 4 is the ANC feedforward control system structural representations of the present invention.
Fig. 5 is the ANC feedforward control system block diagrams of the present invention.
Fig. 6 is the ANC hardware architecture diagrams of the present invention.
Fig. 7 is the ANC workflow diagrams of the present invention.
Label in accompanying drawing is respectively：1st, acoustic device is adopted；2nd, sound-producing device；3rd, lampblack absorber；4th, reference sensor；5、ANC
Signal controls acoustical generator；6th, loudspeaker horn；11st, acoustic device inner chamber is adopted；12nd, high frequency broadband noise sound absorption sponge；13rd, first is small
Hole；21st, acoustical generator inner chamber；22 acoustical generator cover plates；23 acoustical generator high frequencies sound absorption sponge；24 acoustical generator loudspeaker installation sites；25th,
Two apertures.
Embodiment
Detailed introduction is done to the present invention below in conjunction with accompanying drawing：As shown in accompanying drawing 1 to 4, the present invention includes adopting acoustic device
1st, sound-producing device 2, described adopts the left and right sides that acoustic device 1 is distributed in the blower fan of lampblack absorber 3, and sound-producing device 2 is integrated in lampblack absorber 3
The lower section left and right sides of blower fan；Described adopts acoustic device 1 by adopting acoustic device inner chamber 11, high frequency broadband noise sound absorption sponge 12 and ginseng
Examine sensor 4 to constitute, high frequency broadband noise sound absorption sponge 12, which is embedded in, to be adopted in acoustic device inner chamber 11, and reference sensor 4 is located at height
Behind frequency broadband noise sound absorption sponge 12, i.e. high frequency broadband noise sound absorption sponge 12 and dorsad between the panel of blower fan side,
Effect is to collect the voice signal for having filtered out high frequency broadband noise；Described sound-producing device 2 is by acoustical generator inner chamber 21, sounding
Device cover plate 22, acoustical generator high frequency sound absorption sponge 23 and loudspeaker horn 6 are constituted, and loudspeaker horn 6 is placed on the both sides of acoustical generator inner chamber 21
At the acoustical generator loudspeaker installation site 24 being provided with and after acoustical generator high frequency sound absorption sponge 23, acoustical generator high frequency sound absorption sea
Silk floss 23 is placed between acoustical generator cover plate 22 and acoustical generator inner chamber 21, and hair is placed with simultaneously in the ghost of the acoustical generator inner chamber 21
Sound device high frequency sound absorption sponge 23 is used for filtering the high frequency broadband noise in acoustical generator.
Described control device includes ANC signals and controls acoustical generator 5, ANC signals control acoustical generator 5 and reference sensor
4 wired connections, ANC signals control acoustical generator 5 passes through D/A transform modes and the wired connection of loudspeaker horn 6；Described ANC signals
Acoustical generator 5 is controlled to be located in the acoustical generator inner chamber 21 of sound-producing device 2.
Described acoustic device 1 of adopting is towards the first aperture 13 is offered on the panel of blower fan side, and the side panel is sufficiently thin, keeps away
Exempt to form resonant cavity, the percent opening of the first aperture 13 can ensure that sound is effectively gathered, and the panel main function is for preventing
Oil smoke absorbs sound the pollution of sponge to high frequency, and can be very good Oil Guide, dorsad the panel sealing of blower fan side, barrier noise from
Lampblack absorber is spread out of.
The both sides of described acoustical generator cover plate 22 offer second orifice 25, and the second orifice 25 is sufficiently small, and depth is enough
It is thin, prevent from forming resonator, percent opening ensures the effective sounding of loudspeaker horn 6, and acoustical generator high frequency sound absorption sponge 23 is used for ensureing to raise
Horn 6 prevents fume pollution, as long as the both sides of acoustical generator cover plate 22 open second orifice 25 and prevent acoustical generator high frequency sound absorption sponge 23
By fume pollution, the purpose of acoustical generator inner chamber 21 is to improve the energy of sound, makes its effective sounding, volume is more than or equal to
1500cm33, disclosure satisfy that noise elimination is required with this acoustic energy for ensureing to send.
As shown in accompanying drawing 4,6, the main function of reference sensor 4 is acquisition noise signal, and by the acoustic signal of collection
Electric signal is converted into, ANC signals control acoustical generator 5 that the acoustic signal for being converted into electric signal after collection is carried out into after-treatment,
Linear spectral and broad band low frequency spectrum are extracted, phase calculation is carried out, filtered signal is converted by D/A, is transmitted to sounding horn 6, produces
Raw secondary sound source is eliminated the noise.The system is filtered using Fx-LMS algorithms, and the wave filter is classical active active noise reduction
Method.
As shown in Figure 5, the system uses feedforward system, and main processing low-frequency broadband noise is made an uproar with the linear spectral of full frequency band
Sound (high frequency broadband noise is absorbed by acoustical cotton).
As shown in Figure 7, in order to reduce the complexity of algorithm, the reference sensor 4 of left and right is numbered the system, leads to
The passage that numbering judges sound is crossed, is then calculated.Every calculator using the forwarding method, is all the protection model of this patent
Enclose, secondly, the stability problem based on system of the invention, progress be broad band low frequency and linear spectral noise reduction, it is therefore an objective in drop
Sound quality is improved on the basis of making an uproar, based on by noise of range hood linear spectral with the separated method of broadband noise, be also this patent
Protection.
More than invent, the sound absorption sponge in resonant cavity, species is not limited, it is every in resonator plus sound absorption sponge side
Method, is the protection of this patent, and sound absorption sponge does not limit.Add sound absorption sponge outside resonant cavity with grease proofing aperture, be also protection model
Within enclosing.The design shape of resonator is not limited, as long as meeting, enough volumes are all right, so the shape of resonator is not limited,
The resonator of any shape, requires as long as volume is met, is all within the protection domain of the patent.Acoustic device is adopted, it is every in master
It is also within this patent protection domain using sound absorption sponge filter high frequency noise and outside installs grease proofing aperture additional in dynamic noise reduction.
Claims (8)
1. a kind of lampblack absorber of active active noise reduction, it is characterised in that：Including lampblack absorber main body, adopt acoustic device (1), sound-producing device
(2), control device, described lampblack absorber main body, including body and the blower fan in body；Described acoustic device (1) of adopting is set
In in the body, it includes high frequency broadband noise sound absorption sponge (12) and reference sensor (4), described high frequency broadband noise
The sponge (12) that absorbs sound is located between the blower fan and reference sensor (4)；Described sound-producing device (2) is located in the body,
It includes acoustical generator high frequency sound absorption sponge (23) and loudspeaker horn (6), and described acoustical generator high frequency sound absorption sponge (23) is located at institute
State between blower fan and loudspeaker horn (6)；Described control device respectively with reference sensor (4) and loudspeaker horn (6) Electricity Federation, its
Loudspeaker horn (6) sounding is controlled by receiving the signal of reference sensor (4) transmission, to offset the low frequency noise of blower fan.
2. the lampblack absorber of active active noise reduction according to claim 1, it is characterised in that：Described adopts acoustic device (1) point
Cloth is adopted the sound absorption sponge of the high frequency broadband noise in acoustic device (1) (12) and is embedded in and adopt sound in the left and right sides of lampblack absorber (3) blower fan
In device inner chamber (11), reference sensor (4) is located at behind high frequency broadband noise sound absorption sponge (12) and dorsad blower fan side
Panel between.
3. the lampblack absorber of active active noise reduction according to claim 2, it is characterised in that：Described adopts acoustic device (1) face
The first aperture for preventing oil smoke from being polluted to high frequency broadband noise sound absorption sponge (12) is offered on to the panel of blower fan side
(13), the dorsad panel sealing of blower fan side.
4. the lampblack absorber of active active noise reduction according to claim 1, it is characterised in that：Described sound-producing device (2) collection
Into the lower section left and right sides in lampblack absorber (3) blower fan, the acoustical generator high frequency sound absorption sponge (23) in sound-producing device (2) is placed on hair
Between sound device cover plate (22) and acoustical generator inner chamber (21), acoustical generator is placed with simultaneously in the ghost of the acoustical generator inner chamber (21) high
Frequency sound absorption sponge (23), loudspeaker horn (6) is placed on the acoustical generator loudspeaker installation site that acoustical generator inner chamber (21) both sides are provided with
(24) place and after acoustical generator high frequency sound absorption sponge (23).
5. the lampblack absorber of active active noise reduction according to claim 1, it is characterised in that：Described control device includes
ANC signals control acoustical generator (5), ANC signals control acoustical generator (5) and reference sensor (4) wired connection, ANC signal controls
Acoustical generator (5) processed passes through D/A transform modes and loudspeaker horn (6) wired connection.
6. the lampblack absorber of active active noise reduction according to claim 5, it is characterised in that：Described ANC signals control hair
Sound device (5) is located in the acoustical generator inner chamber (21) of sound-producing device (2).
7. the lampblack absorber of active active noise reduction according to claim 4, it is characterised in that：Described acoustical generator cover plate (22)
Both sides offer several be used for prevent oil smoke to acoustical generator high frequency absorb sound sponge (23) pollution second orifice (25).
8. the lampblack absorber of active active noise reduction according to claim 4, it is characterised in that：Described acoustical generator inner chamber (21)
Volume be more than or equal to 1500cm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710271106.9A CN107166458A (en) | 2017-04-24 | 2017-04-24 | A kind of lampblack absorber of active active noise reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710271106.9A CN107166458A (en) | 2017-04-24 | 2017-04-24 | A kind of lampblack absorber of active active noise reduction |
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| Publication Number | Publication Date |
|---|---|
| CN107166458A true CN107166458A (en) | 2017-09-15 |
Family
ID=59812853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710271106.9A Pending CN107166458A (en) | 2017-04-24 | 2017-04-24 | A kind of lampblack absorber of active active noise reduction |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990390A (en) * | 2018-01-22 | 2018-05-04 | 广东美的厨房电器制造有限公司 | A kind of range hood |
| CN108167910A (en) * | 2018-03-12 | 2018-06-15 | 杭州老板电器股份有限公司 | Active active noise reducing device and range hood |
| CN109767749A (en) * | 2019-01-07 | 2019-05-17 | 中车青岛四方机车车辆股份有限公司 | A seat-based noise active control system and noise active control method |
| CN110439860A (en) * | 2018-05-04 | 2019-11-12 | 宁波方太厨具有限公司 | A kind of volute structure of centrifugal blower |
| CN110513741A (en) * | 2019-08-29 | 2019-11-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
| CN110822504A (en) * | 2018-08-10 | 2020-02-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
| CN111102247A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN111928310A (en) * | 2020-09-08 | 2020-11-13 | 珠海格力电器股份有限公司 | Fume exhaust fan |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990390A (en) * | 2018-01-22 | 2018-05-04 | 广东美的厨房电器制造有限公司 | A kind of range hood |
| CN108167910A (en) * | 2018-03-12 | 2018-06-15 | 杭州老板电器股份有限公司 | Active active noise reducing device and range hood |
| CN110439860A (en) * | 2018-05-04 | 2019-11-12 | 宁波方太厨具有限公司 | A kind of volute structure of centrifugal blower |
| CN110439860B (en) * | 2018-05-04 | 2025-04-15 | 宁波方太厨具有限公司 | A volute structure of a centrifugal fan |
| CN110822504A (en) * | 2018-08-10 | 2020-02-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
| CN110822504B (en) * | 2018-08-10 | 2021-05-25 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
| CN111102247A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN111102247B (en) * | 2018-10-25 | 2022-05-17 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN109767749A (en) * | 2019-01-07 | 2019-05-17 | 中车青岛四方机车车辆股份有限公司 | A seat-based noise active control system and noise active control method |
| CN110513741A (en) * | 2019-08-29 | 2019-11-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
| CN111928310A (en) * | 2020-09-08 | 2020-11-13 | 珠海格力电器股份有限公司 | Fume exhaust fan |
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