CN104848432A - Air purifier with active noise reduction device - Google Patents

Air purifier with active noise reduction device Download PDF

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Publication number
CN104848432A
CN104848432A CN201510287896.0A CN201510287896A CN104848432A CN 104848432 A CN104848432 A CN 104848432A CN 201510287896 A CN201510287896 A CN 201510287896A CN 104848432 A CN104848432 A CN 104848432A
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China
Prior art keywords
air
signal
filter
active noise
purifier
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CN201510287896.0A
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Chinese (zh)
Inventor
钱华
谢小亮
郑晓红
宋金蔚
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Southeast University
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Southeast University
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Priority to CN201510287896.0A priority Critical patent/CN104848432A/en
Publication of CN104848432A publication Critical patent/CN104848432A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/24—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using sterilising media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/247—Active noise-suppression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • F24F2120/12—Position of occupants

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The invention discloses an air purifier with an active noise reduction device. The air purifier comprises a main case (1), an air inlet (2), an air outlet (14), a flow guide fan (8) and an air purifying unit and an active noise reduction unit arranged in the main case, the air inlet (2) is arranged in the lower portion of the purifier, and the air outlet (14) is arranged in the upper portion of the air purifier. An acoustic wave in uniform amplitude and reverse phase with a noise source is generated through the active noise reduction device, two columns of acoustic waves are mutually superimposed in the downstream of an air duct to achieve the purpose of noise elimination, low-frequency noise generated by rotation n of a motor, a fan and the like in the purifier can be effectively eliminated, the purifier purifies indoor air efficiently, and meanwhile a comfortable and quiet indoor environment is created.

Description

A kind of air purifier with active noise reducing device
Technical field
The present invention relates to a kind of air purifier, particularly a kind of air purifier with active noise reducing device
Background technology
Atmosphere polluting problem can not be ignored, in recent years, the multiple city haze of China is seriously polluted, many times people cannot ensure the pure and fresh cleaning of room air by ventilation, and simultaneously indoor formaldehyde exceeds standard, the various problem such as propagation, air conditioner comprehensive disease of microbial virus bacterium also drastically influence indoor air quality.Severe room air pollution situation, on the breathing of people with healthyly bring serious impact, the physical and mental health of people has been arrived in serious threat, and people prevent from also more paying attention to room air pollution.In order to tackle the air pollution problem inside rooms that finishing pollution and urban atmospheric pollution bring, air purifier is more and more selected by Chinese family, and become a kind of emerging household electrical appliance, but the problem of air purifier ubiquity noise pollution at present, the harm of noise is not only interference sleep, hearing damage, and it can not be ignored the impact of health.World Health Organization is thought: environmental noise threatens the one of publilc health, to the physical and mental health of people, there is negative effect, noise higher than 40dB can cause the problems such as conscious sleep-disorder, Environmental insomnia, the intimate risk of vascular diseases of people can be made to increase more than the noise of 55dB, and at present the operation noise of air purifier generally higher than 50dB.In order to build comfortable quiet indoor environment, the noise effectively removing air purifier generation just seems particularly important.
Traditional Noise measarement great majority are all adopt passive control methods (as sqouynd absorption lowering noise, sound insulation and noise reducing etc.), these methods are for high frequency noise successful, but active noise controlling is not so good as the effect of low frequency noise, and the mainly low-frequency noise that air purifier produces.For this low-frequency noise, if adopt traditional passive noise-reduction method, often need the various noise elimination structure of additional designs, thus occupy more space, in addition passive noise reduction just can only can play desirable noise reduction to the noise of a certain frequency range, when environment changes or the noise properties of noise source itself changes, noise reduction can obviously decline.
Summary of the invention
Technical problem: task of the present invention to provide a kind of air purifier with active noise reducing device.By being arranged on the active noise reducing device in air purifier, eliminate the low-frequency noise that air purifier produces lastingly and stably, make air purifier while high-efficient purification room air, the peace and quiet of holding chamber environment are comfortable.
For solving the problems of the technologies described above, the invention provides a kind of air purifier with active noise reducing device, comprise main case 1, air air inlet 2, air air outlet 14, drainage blower fan 8 and the air cleaning member be arranged in main case and active noise reduction unit, air air inlet (2) is arranged at the bottom of clarifier, and air air outlet 14 is arranged on the top of air purifier;
Described active noise reduction unit is arranged on above described drainage blower fan 8, below described air air outlet, comprise connect successively for acquisition noise signal as with reference to the reference sensor 13 of signal, for gathered reference signal being changed into the noise signal analog-digital converter 17 of numerical signal, for carrying out the feedforward filter 18 of adaptive-filtering to gained numerical signal, for filtered numerical signal being converted to the loudspeaker digital-to-analogue converter 16 of analog signal, loudspeaker 11 and opening for exporting gained analog signal cover on the blimp 12 on described loudspeaker 11 towards downstream, air channel,
Described feedforward filter 18 is connected with the in good time algorithm renovator 19 for more new algorithm, be connected with the error pick-up 13 for gathering remaining noise signal with described in good time algorithm renovator 19, the noise signal of the remnants be connected with for being gathered by described error pick-up 13 between described error pick-up 13 and described in good time algorithm renovator 19 is converted to the error signal analog-digital converter 15 of error value signal.
Preferably, described air cleaning member is arranged on above described air air inlet, along air channel comprise successively from the bottom up pretreatment slightly imitate filter assemblies 3, in have the particle precipitator 4 of forceful electric power place, photocatalysis assembly 5, for irradiating the LED light source 6 of described photocatalysis assembly 5 and ozone removes assembly 7;
Described pretreatment slightly imitates filter assemblies 3 by screen pack, filter core and metal framework composition, and screen pack is covered in the outside of filter core and jointly forms screen pack, and screen pack is placed among metal framework;
Described particle precipitator adopts Double-region electrostatic dust collector, and it is divided into ionization section and control of dust section, and ionization section is made up of high pressure ionization line and negative plate, and control of dust section is made up of negative plate and positive plate;
Described photocatalysis assembly 5 comprises photo-catalytic filtering screen, after the irradiation of LED light source 6, removes the pernicious gas in air and bacterial virus.
Preferably, the choosing of filter length of described feedforward filter (18) is carried out according to the speed restrained in practical application and system hardware situation.
Preferably, described feedforward filter 18 adopts and implements conveniently, have FIR (FiniteImpulse Response) sef-adapting filter of transversary.
Preferably, the cylindrical-shaped structure of the single-open that described blimp 12 adopts metallic plate to make, opening is towards air channel downstream direction, and inwall lays vibration isolation material, prevents the low-frequency resonance of metallic plate.
Beneficial effect: the present invention produces a sound wave anti-phase with noise source constant amplitude by active noise reducing device, two row sound waves superpose in the downstream in air channel the object reaching noise elimination mutually, it effectively can eliminate the low-frequency noise that motor in clarifier, fan rotation etc. produce, make this clarifier while high-efficient purification room air, build comfortable quiet indoor environment.And the present invention additionally uses adaptive algorithm, the response sound source characteristic change that control system can be real-time, realizes lasting and stable noise reduction.This invention additionally uses the measure of anti-acoustic feedback in addition, and the noise that loudspeaker is sent can not have an impact to the reference sensor of its upstream, ensure that the operation of noise reduction system efficient stable.
Accompanying drawing explanation
Fig. 1 is air-treatment of the present invention and noise processed sketch;
Fig. 2 is the block diagram of noise control system of the present invention
Fig. 3 is the flow chart that noise control system algorithm of the present invention upgrades
In figure, 1 is main case, 2 is clarifier air inlet, 3 is pretreatment low efficient filter, 4 is particle electrostatic precipitator, 5 is photo-catalytic filtering screen, 6 is LED light source, 7 is catalytic decomposition of ozone screen pack, 8 is drainage blower fan, 9 is reference sensor, 10 for fixing the support of blimp, 11 is loudspeaker, 12 is blimp, 13 is error pick-up, 14 is clarifier air outlet, 15 is error signal analog-digital converter, 16 is loudspeaker digital to analog converter, 17 is noise signal analog-digital converter, 18 is feedforward FIR filter, 19 is the in good time algorithm renovator based on LMS algorithm.
Detailed description of the invention
Below in conjunction with drawings and the embodiments, patent of the present invention is described in further detail:
As shown in Figure 1, the present embodiment comprises: the fixed support 10 of main case 1, clarifier air inlet 2, pretreatment low efficient filter 3, particle electrostatic precipitator 4, photo-catalytic filtering screen 5, LED light source 6, catalytic decomposition of ozone screen pack 7, drainage blower fan 8, reference sensor 9, loudspeaker 11, blimp 12, error pick-up 13, clarifier air outlet 14, error signal analog-digital converter 15, loudspeaker digital to analog converter 16, noise signal analog-digital converter 17, feedforward FIR filter 18, in good time algorithm renovator 19 based on LMS algorithm.Wherein: after pretreatment low efficient filter 3 is arranged at clarifier air inlet 2, particle electrostatic precipitator 4, light catalyst filter 5, LED light source 6, catalytic decomposition of ozone screen pack 7, drainage blower fan 8 and reference sensor 9 is set gradually thereafter.Fixed support 10 one end connects purification of air air channel, and the other end connects blimp 12, and the opening direction of blimp 12 is consistent with air current flow direction, and loudspeaker 11 is arranged on the inside of blimp 12.After blimp 12 is located at by error pick-up 13, before clarifier air outlet 14.
From the air containing dust and pernicious gas that clarifier air inlet 2 enters, first the dust and pet hair etc. of Large stone is filtered out by pretreatment low efficient filter 3, then by the forceful electric power place of particle electrostatic precipitator 4 formation, the fine particle made is charged, the highfield of corona discharge formation simultaneously, partial air is ionized, the pernicious gas such as energetic free radical decomposing formaldehyde formed also has the effect of disinfecting mite-removing, and fine particle charged is subsequently caught by the metal collecting plate of particle electrostatic precipitator 4.Photo-catalytic filtering screen in photocatalysis assembly 5, after the irradiation of LED light source 6, removes the pernicious gas in air and bacterial virus further.The ozone that catalytic decomposition of ozone screen pack 7 produces for catalytic decomposition particle electrostatic precipitator 4, the air after the ozone pollution prevented purification.Last under the effect of drainage blower fan 8, the pure air after process sends into indoor by clarifier air outlet 14.
The low-frequency noise that drainage blower fan 8 in air purifier and air cleaning member produce is along air channel propagates down stream, be located at reference sensor 9 acquisition noise signal after induction fan 8 as with reference to signal, and be that numerical signal is input to feedforward FIR filter 18 and based in the in good time algorithm renovator 19 of LMS algorithm by analog-signal transitions by noise mode number converter 17, reference signal produces a new output signal after adaptive filtering and algorithm upgrade, numerical signal is converted to analog signal by loudspeaker digital to analog converter 16 by this signal again, a sound wave and noise waves interfere is produced by loudspeaker 11.Because loudspeaker is located in the blimp 12 of single-open, the sound adopting this device can effectively prevent reference sensor 9 from collecting loudspeaker 11 to send, thus affect the quality of reference signal, prevent the generation of acoustic feedback.Last error pick-up 13 gathers remaining noise signal and to be input in good time algorithm renovator 19 more new algorithm through error signal analog-digital converter 15 conversion.
Air purifier ANC system schematic diagram is as shown on the right side of Fig. 1: in figure, induction fan represents fan in air purifier and other sound source, noise sound wave is propagated to pipe downstream from here, acquisition noise signal is used for as converting analog signal to numerical signal by a/d converter be input in controller with reference to signal at reference sensor place, reference signal produces a new output signal after adaptive filtering and algorithm upgrade in the controller, this signal converts numerical signal to analog signal by D/A converter again, produce a sound wave by loudspeaker to interference with noise sound wave.The noise signal of last error pick-up collection remnants to be input in controller more new algorithm through A/D conversion.Wherein, setting induction fan is p, and reference sensor is r, and loudspeaker is s, and error pick-up is e.
Adaptive-filtering of the present invention and algorithm renewal process as follows:
Suppose sound wave from induction fan p to the transfer function of reference sensor r be Hpr (z), from induction fan p to the transfer function of error pick-up e be Hpe (z) (that is to say primary channel transfer function), from loudspeaker s to the transfer function of error pick-up e be Hse (z), from reference sensor r to the transfer function of error pick-up e be Hre (z) (that is to say error path transfer function), particular flow sheet is noise signal as p (n) in Fig. 2: figure, that is to say reference-input signal; The noise signal that d (n) and s (n) receive for error pick-up and loudspeaker signal; The signal that x (n) receives for wave filter, the impulse response of path is respectively hpr (n), hpe (n), hse (n), and the relation between each signal is as follows:
d(n)＝p(n)*h pe(n)
x(n)＝p(n)*h pr(n)
s(n)＝y(n)*h se(n)
In practice, due to reference sensor r be placed on from sound source p very close to place, what can be similar to thinks hpr (z)=1, so p (n)=x (n).Selecting filter wavelength is L, and in the present invention, filter length L is one of main structure parameters of wave filter, and it represents the number of filter coefficient vector median filter coefficient, and its size can have an impact to the performance of control system.When filter length increases, the reference signal of the computing of iteration participation is each time more, and the speed of convergence is faster.But the length of wave filter is unsuitable long, because can improve the hardware requirement of system to controller like this, thus raises the cost, is unfavorable for practical application.So, the length of wave filter excessive or too small all can the anti-acoustic capability of influential system, suitable filter length should be chosen according to actual conditions.
So filter factor W (n) of the n-th moment transversal filter can be expressed as with reference-input signal X (n):
W(n)＝[w 1(n),w 2(n),...,w L(n)] T
X(n)＝[x(n),x(n-1),...,x(n-L+1)] T
Input signal y (n) can be obtained according to following formula:
y ( n ) = W T ( n ) X ( n ) = Σ i = 1 L w i ( n ) x ( n - i + 1 )
According to elementary sound source acoustic pressure local stationary characteristic, can think that filter factor changes within a certain period of time very little, then s (n) can be expressed from the next into:
s(n)＝y(n)*h se(n)＝W T(n)X(n)*h se(n)
If r (n)=X (n) * h se(n), substituting into above formula has:
s ( n ) = W T ( n ) r ( n ) = Σ i = 1 L w i ( n ) r ( n - i + 1 )
Error signal at e place is:
e(n)＝d(n)+s(n)＝d(n)+W T(n)r(n)
Still with the lowest mean square of error signal for standard, be simplify calculate, meet the real-time of system, adopt unbiased esti-mator replace real gradient, the gradient of trying to achieve now is:
▿ ( n ) = ∂ e 2 ( n ) ∂ W ( n ) = 2 e ( n ) ∂ e ( n ) ∂ W ( n ) = 2 e ( n ) r ( n )
Can represent with following formula according to the relation between the present filter factor vector of the filter factor vector of steepest descent method subsequent time:
W(n+1)＝W(n)-2μe(n)r(n)
Wherein, μ is convergence coefficient, and in the present invention, convergence coefficient can not be too large, crosses conference and cause system not restrain; Simultaneously convergence coefficient also should not be too little, too smallly can reduce convergence rate.Seeking optimum convergence coefficient can with reference to transfers between divisions:
1) quantity of loudspeaker and error pick-up: increasing number, the convergence coefficient chosen will reduce;
2) filter length L: length increases, and the convergence coefficient chosen will reduce;
3) sound pressure level of noise: sound pressure level is higher, the convergence coefficient chosen is less.
In sum, the concrete control flow of adaptive ANC system is as follows:
1) the choosing of parameter: selecting filter length and convergence coefficient
2) evaluated error channel transfer function;
3) filter coefficient initializes: W (0)=0
4) loop computation:
y(n)＝W T(n)X(n)
d(n)＝x(n)*h pe(n),s(n)＝y(n)*h se(n)
e(n)＝d(n)+s(n),r(n)＝X(n)*h se(n)
W(n+1)＝W(n)-2μe(n)r(n)
Until system convergence, obtain stable e (n).Determine filter factor.Flow chart as shown in Figure 3.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (5)

1. the air purifier with active noise reducing device, it is characterized in that, comprise main case (1), air air inlet (2), air air outlet (14), drainage blower fan (8) and the air cleaning member be arranged in main case and active noise reduction unit, air air inlet (2) is arranged at the bottom of clarifier, and air air outlet (14) is arranged on the top of air purifier;
Described active noise reduction unit is arranged on described drainage blower fan (8) top, below described air air outlet, comprise connect successively for acquisition noise signal as with reference to the reference sensor (13) of signal, for gathered reference signal being changed into the noise signal analog-digital converter (17) of numerical signal, for carrying out the feedforward filter (18) of adaptive-filtering to gained numerical signal, for filtered numerical signal being converted to the loudspeaker digital-to-analogue converter (16) of analog signal, blimp (12) on described loudspeaker (11) is covered on towards downstream, air channel for exporting the loudspeaker (11) of gained analog signal and opening,
Described feedforward filter (18) is connected with the in good time algorithm renovator (19) for more new algorithm, be connected with the error pick-up (13) for gathering remaining noise signal with described in good time algorithm renovator (19), the noise signal of the remnants be connected with for being gathered by described error pick-up (13) between described error pick-up (13) and described in good time algorithm renovator (19) is converted to the error signal analog-digital converter (15) of error value signal.
2. the air purifier of band active noise reducing device according to claim 1, it is characterized in that, described air cleaning member is arranged on above described air air inlet, along air channel comprise successively from the bottom up pretreatment slightly imitate filter assemblies (3), in have the particle precipitator (4) of forceful electric power place, photocatalysis assembly (5), for irradiating the LED light source (6) of described photocatalysis assembly (5) and ozone removes assembly (7);
Described pretreatment slightly imitates filter assemblies (3) by screen pack, filter core and metal framework composition, and screen pack is covered in the outside of filter core and jointly forms screen pack, and screen pack is placed among metal framework;
Described particle precipitator adopts Double-region electrostatic dust collector, and it is divided into ionization section and control of dust section, and ionization section is made up of high pressure ionization line and negative plate, and control of dust section is made up of negative plate and positive plate;
Described photocatalysis assembly (5) comprises photo-catalytic filtering screen, after the irradiation of LED light source (6), removes the pernicious gas in air and bacterial virus.
3. the air purifier of band active noise reducing device according to claim 1, is characterized in that, the choosing of filter length of described feedforward filter (18) is carried out according to the speed restrained in practical application and system hardware situation.
4. the air purifier of band active noise reducing device according to claim 1, is characterized in that, described feedforward filter (18) adopts the FIR sef-adapting filter with transversary.
5. the air purifier of band active noise reducing device according to claim 1, is characterized in that, the cylindrical-shaped structure of the single-open that described blimp (12) adopts metallic plate to make, opening is towards air channel downstream direction, and its inwall lays vibration isolation material.
CN201510287896.0A 2015-05-29 2015-05-29 Air purifier with active noise reduction device Pending CN104848432A (en)

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CN106766085A (en) * 2016-12-08 2017-05-31 顾青林 A kind of air-conditioning and its noise cancellation method
CN106766086A (en) * 2016-08-20 2017-05-31 中声科技（北京）有限公司 The air-conditioning that a kind of active abates the noise
CN106839386A (en) * 2017-01-22 2017-06-13 会听声学科技（北京）有限公司 A kind of active noise reduction system and method for tower air cleaner
CN107327914A (en) * 2017-07-10 2017-11-07 深圳沃海森科技有限公司 Reduce the concealed type air-conditioning of indoor volume
EP3258183A1 (en) * 2016-06-13 2017-12-20 Robert Bosch GmbH Method and control unit for detection of faults in a heating system and/or in an air conditioning system and a heating system and/or an air conditioning system
CN107664319A (en) * 2016-07-29 2018-02-06 于学库 Silence type air cleaner
CN108806659A (en) * 2017-04-27 2018-11-13 北京小米移动软件有限公司 Noise-reduction method and device, the electronic equipment of air purifier
CN109353485A (en) * 2018-10-16 2019-02-19 上海交通大学 Air purifier for pressurized cabin of ship and its vibration and noise reducing optimization method
CN110741209A (en) * 2017-06-13 2020-01-31 优尼科艾尔有限公司 Indoor air purifier
CN111059753A (en) * 2019-07-05 2020-04-24 青岛海信日立空调***有限公司 Air duct machine
CN111121255A (en) * 2019-12-18 2020-05-08 袁文硕 Classroom environment control system
CN111161701A (en) * 2019-12-27 2020-05-15 汉得利（常州）电子股份有限公司 Active noise control system of air conditioner fan
CN111336642A (en) * 2020-04-15 2020-06-26 江苏弘冉智能科技有限公司 Real-time protection air curtain system
CN112037752A (en) * 2020-09-08 2020-12-04 珠海格力电器股份有限公司 Household appliance noise reduction method and device, computer equipment and storage medium
CN112797557A (en) * 2021-01-15 2021-05-14 珠海格力电器股份有限公司 Purification equipment
JP2021085370A (en) * 2019-11-28 2021-06-03 フォスター電機株式会社 Silencer for air conditioning device
WO2021169678A1 (en) * 2020-02-28 2021-09-02 青岛海尔空调电子有限公司 Noise-reducing air duct assembly used for duct-type air conditioner and design method for noise-reducing air duct assembly
WO2021174781A1 (en) * 2020-03-03 2021-09-10 青岛海尔空调器有限总公司 Active noise reduction air conditioner and control method therefor
CN114526545A (en) * 2022-02-09 2022-05-24 安徽云诺环保科技有限公司 Air purifier is with high-efficient noise reduction system and fall and make an uproar with buffer structure thereof
CN115188358A (en) * 2022-07-21 2022-10-14 广东浦尔顿科技有限公司 Noise processing method of direct current charging module
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CN106123160A (en) * 2016-06-08 2016-11-16 杭州龙碧科技有限公司 A kind of new wind devices of variable air rate
EP3258183A1 (en) * 2016-06-13 2017-12-20 Robert Bosch GmbH Method and control unit for detection of faults in a heating system and/or in an air conditioning system and a heating system and/or an air conditioning system
CN107664319A (en) * 2016-07-29 2018-02-06 于学库 Silence type air cleaner
CN106128449B (en) * 2016-08-16 2023-09-01 青岛歌尔声学科技有限公司 Active noise reduction method for automobile
CN106128449A (en) * 2016-08-16 2016-11-16 青岛歌尔声学科技有限公司 A kind of automobile active denoising method
CN106766086A (en) * 2016-08-20 2017-05-31 中声科技（北京）有限公司 The air-conditioning that a kind of active abates the noise
CN106766085A (en) * 2016-12-08 2017-05-31 顾青林 A kind of air-conditioning and its noise cancellation method
CN106766085B (en) * 2016-12-08 2019-06-14 顾青林 A kind of air-conditioning and its noise cancellation method
CN106839386A (en) * 2017-01-22 2017-06-13 会听声学科技（北京）有限公司 A kind of active noise reduction system and method for tower air cleaner
CN106839386B (en) * 2017-01-22 2020-07-03 会听声学科技（北京）有限公司 Active noise reduction system and method for tower type air purifier
CN108806659A (en) * 2017-04-27 2018-11-13 北京小米移动软件有限公司 Noise-reduction method and device, the electronic equipment of air purifier
CN110741209A (en) * 2017-06-13 2020-01-31 优尼科艾尔有限公司 Indoor air purifier
CN107327914A (en) * 2017-07-10 2017-11-07 深圳沃海森科技有限公司 Reduce the concealed type air-conditioning of indoor volume
CN109353485A (en) * 2018-10-16 2019-02-19 上海交通大学 Air purifier for pressurized cabin of ship and its vibration and noise reducing optimization method
CN111059753A (en) * 2019-07-05 2020-04-24 青岛海信日立空调***有限公司 Air duct machine
CN111059752A (en) * 2019-07-05 2020-04-24 青岛海信日立空调***有限公司 Air duct machine
US11763793B2 (en) * 2019-11-28 2023-09-19 Foster Electric Company, Limited Silent device for air conditioning equipment
JP2021085370A (en) * 2019-11-28 2021-06-03 フォスター電機株式会社 Silencer for air conditioning device
US20220415302A1 (en) * 2019-11-28 2022-12-29 Foster Electric Company, Limited Silent device for air conditioning equipment
WO2021106359A1 (en) * 2019-11-28 2021-06-03 フォスター電機株式会社 Silent device for air conditioning equipment
JP7283715B2 (en) 2019-11-28 2023-05-30 フォスター電機株式会社 Silencers for air conditioners
CN111121255A (en) * 2019-12-18 2020-05-08 袁文硕 Classroom environment control system
CN111121255B (en) * 2019-12-18 2021-04-13 袁文硕 Classroom environment control system
CN111161701A (en) * 2019-12-27 2020-05-15 汉得利（常州）电子股份有限公司 Active noise control system of air conditioner fan
WO2021169678A1 (en) * 2020-02-28 2021-09-02 青岛海尔空调电子有限公司 Noise-reducing air duct assembly used for duct-type air conditioner and design method for noise-reducing air duct assembly
WO2021174781A1 (en) * 2020-03-03 2021-09-10 青岛海尔空调器有限总公司 Active noise reduction air conditioner and control method therefor
CN111336642A (en) * 2020-04-15 2020-06-26 江苏弘冉智能科技有限公司 Real-time protection air curtain system
CN112037752A (en) * 2020-09-08 2020-12-04 珠海格力电器股份有限公司 Household appliance noise reduction method and device, computer equipment and storage medium
CN112797557A (en) * 2021-01-15 2021-05-14 珠海格力电器股份有限公司 Purification equipment
CN114526545B (en) * 2022-02-09 2022-09-06 安徽云诺环保科技有限公司 Air purifier is with high-efficient noise reduction system and fall and make an uproar and use buffer structure thereof
CN114526545A (en) * 2022-02-09 2022-05-24 安徽云诺环保科技有限公司 Air purifier is with high-efficient noise reduction system and fall and make an uproar with buffer structure thereof
WO2024003186A1 (en) * 2022-07-01 2024-01-04 KAPPA Filter Systems GmbH Room air purifier with low pressure filter
CN115188358A (en) * 2022-07-21 2022-10-14 广东浦尔顿科技有限公司 Noise processing method of direct current charging module

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Application publication date: 20150819