CN1781577A - Air purifier with dust sensor and its control method - Google Patents
Air purifier with dust sensor and its control method Download PDFInfo
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- CN1781577A CN1781577A CN 200410093772 CN200410093772A CN1781577A CN 1781577 A CN1781577 A CN 1781577A CN 200410093772 CN200410093772 CN 200410093772 CN 200410093772 A CN200410093772 A CN 200410093772A CN 1781577 A CN1781577 A CN 1781577A
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Abstract
The present invention relates to a kind of air purifier with dust sensor and its control method. The control method includes the following stages: calculating the dust contamination degree of indoor air; controlling the wind amount of the air purifier based on the dust contamination degree; and altering the wind amount corresponding to the increased dust contamination degree or maintaining the wind amount corresponding to the decreased dust contamination degree. The present invention makes it possible to purify indoor air, including indoor air far from the air purifier.
Description
Technical field
The present invention relates to a kind of air purifier and control method thereof (Air cleaner having adust sensor and control method of it), or rather, relate to a kind of air purifier and control method thereof that possesses dust sensor.
Background technology
In general, air purifier is the device that foul atmosphere can be cleaned into pure air.It can utilize fan that foul atmosphere is sucked, and with control of dust or filtrations (filtering) in addition such as wherein fine dust or bacteriums, and can remove bad smells such as peculiar smell in the living space or smoke.
Fig. 1 is the side view of common air-conditioning clarifier.
If on air purifier 10, connect power supply, and press button (button) on the operating portion 18 that forms on the upper panel 16, start the words of purification function, the fan (not shown) that is installed in air purifier 10 inside so will begin rotation, thereby is the inside that indoor air is drawn into air purifier by air-inlet grille (grill) 14 of the lower end formation of plate 12 in front with the outside.These air that are inhaled into are when flowing through filter assemblies (filter assembly) (not shown) that is installed in air-inlet grille 14 back, and dust wherein and peculiar smell etc. can be filtered out, thereby become clean air.These air that become pure air can be by row to air exhausting grille 20 under the effect of the revolving force of fan (not shown), and it is promptly indoor to flow to the outside of air purifier by air exhausting grille 20 then.
In Fig. 1, black arrow represents to flow to the air stream of air purifier inside, and white arrow is represented from the inner air stream of discharging of air purifier.
In general, aforesaid air purifier by carry out repeatedly with room air suck the stage of air purifier, stage of purifying by the method for filtering, will be through the stage of filtered air discharge, just can be with removals such as dust in the room air or peculiar smell, thus room air is become pure air.
In such air purifier, this part thing of speed of suitably controlling fan according to indoor pollution level has very important significance at tool aspect the cleanliness factor that improves room air.
But the mode that existing air purifier is regulated fan speed then is: judge indoor pollution level by the user by sense organ, be adjusted in the button on the operating portion 18 that forms on the upper panel 16 then, thereby regulate the speed of fan.For example, when making the dustiness of room air raise suddenly owing to cleaning, the cooking or visiting guest are more, the user generally can be by sensory feel to this state, directly regulate the button on the operating portion 18 then, fan speed is transferred on the position of " by force ", thereby accelerate the circulation of room air, reduce dustiness rapidly; Making room air keep cleanliness factor to a certain degree because of ventilation, or under the usual situation of air purity less than what big variation, general the speed of fan is transferred on the position of " weak ", thereby is continued to keep the lower air purification effect of a kind of degree.
The control method of the air purifier of this employing manual mode is owing to can not make the actual dustiness of room air and the fan speed of air purifier be consistent, therefore can bring following problem, even for example under the dustiness condition with higher, still can be with the state work of weak purification, thus sense of discomfort brought to the user; Or opposite, the dustiness of original room air was lower, but with the state work of strong purification, thereby caused unnecessary power consumption.
Therefore need a kind of mode that can regulate fan speed automatically, that is to say needs a kind of method that can control purification speed according to the actual dustiness of room air.This method generally need be utilized the various sensors that can measure dustiness, after these sensors are measured the dustiness of room air exactly, regulates the fan speed of air purifier more automatically according to measurement result.
Summary of the invention
The purpose of this invention is to provide a kind of air purifier that possesses dust sensor, this air purifier can be after mensuration flow into the contamination by dust degree of room air of air purifier inside, automatically control the purification speed of air purifier again according to measurement result, thereby room air is thoroughly purified.
Another object of the present invention provides the most suitable a kind of above-mentioned control method that possesses the air purifier of dust sensor.
To achieve these goals, the invention provides a kind of air purifier that possesses dust sensor, it is characterized in that: it comprises following part, and promptly dust sensor 410, in order to calculate the contamination by dust degree of room air, it is installed on the position that the air of filtered flows; Filter house 530, it can filter the room air that is inhaled into air purifier 100 inside, makes these air become pure air; Fans drive portion 540, it can control the speed of fan according to the contamination by dust degree that above-mentioned dust sensor 410 is calculated; Control part 500, it can control the action of air purifier according to the action control signal of user's input, and after the situation that instant cut-offs such as power failure occur, it can have a power failure when starting once more, and compensation is controlled and power connection control.
In an example of the present invention, the dustiness of the air of the filtered that flows into for the dust hole 400 that can measure by the air purifier front, above-mentioned dust sensor 410 is installed in the rear in above-mentioned dust hole 400.
In another example of the present invention, the dustiness of the air of the filtered that flows into for the air inlet that can measure by air purifier, above-mentioned dust sensor 410 is installed near the above-mentioned air inlet.
To achieve these goals, the invention provides a kind of control method that possesses the air purifier of dust sensor, it is characterized in that: it comprised with the next stage, promptly calculated the stage of the contamination by dust degree of room air; Control the stage of the air quantity of air purifier 100 according to above-mentioned contamination by dust degree; Change the stage of air quantity, in this stage, when above-mentioned contamination by dust degree from " height " or " " level when beginning downward trend to occur, just in setting-up time, keep original air quantity, change air quantity according to the contamination by dust degree of calculating once more then, and when above-mentioned contamination by dust degree when the level of " low " begins ascendant trend to occur, then corresponding immediately change air quantity.
Here, above-mentioned setting-up time is preferably in about 2 minutes and 30 seconds.
The computational methods of above-mentioned contamination by dust degree are: will be within a certain period of time the ratio of dust sensor (410) cumulative time that can detect dust and above-mentioned certain hour be considered as the contamination by dust degree.
In addition, when above-mentioned contamination by dust degree is " height ", air quantity is adjusted to " by force "; When above-mentioned contamination by dust degree be " in " time, air quantity is adjusted to " in "; When above-mentioned contamination by dust degree is " low ", air quantity is adjusted to " weak ".
Because the far interior foul atmosphere in zone of the present invention even the air purifier of can adjusting the distance thoroughly purifies, and therefore can make the air in the indoor whole zone all keep clean state.
If adopt air purifier and the control method thereof that possesses dust sensor of the present invention, then the contamination by dust degree be in " height " or " in " situation under, even the dustiness of calculating once more is some decline slightly, also still keep original air quantity within a certain period of time, change air quantity according to the dustiness of after this calculating once more then.Under this working method, system can not change air quantity again and again for the variation of tackling the contamination by dust degree, therefore can prevent that locking system breaks down.On the other hand, even the dustiness of air purifier ambient air descends to some extent, but may also not descend than the air pollution degree in the territory, far field relatively, if change air quantity in this case, will certainly cause the consequence that can't thoroughly purify the air of a room, but the present invention can address this problem then.
And when the contamination by dust degree when the state of " low " upwards raises, then can change air quantity at once, therefore situation about rising at the room air pollution degree can be taked counter-measure rapidly.
Description of drawings
Fig. 1 is the side view of common air-conditioning clarifier;
Fig. 2 is the side view that has adopted the air purifier that possesses dust sensor of an example of the present invention;
Fig. 3 is the composition structure chart that possesses the air purifier of dust sensor of the present invention;
Fig. 4 is the control method flow chart that possesses the air purifier of dust sensor of the present invention.
The major part description of reference numerals
100: air purifier 110: front panel (panel)
112: front air intake 114: the front lower place air inlet
116: right side air inlet 210: rear board (panel)
212: back air inlet 214: back lower place air inlet
310: air draft panel (panel) 400: dust hole
410: dust sensor (sensor) 500: control part
510: power supply 520: display part (display)
530: filter part 540: fans drive portion
550: storage part
The specific embodiment
With reference to the accompanying drawings air purifier and the control method thereof that possesses dust sensor of the present invention illustrated in further detail.
Fig. 2 is the side view that has adopted the air purifier that possesses dust sensor of an example of the present invention, and Fig. 3 is the composition structure sketch map that possesses the air purifier of dust sensor of the present invention.
Air purifier of the present invention is substantially by forming with the lower part, that is: power supply 510, can provide power supply to the body of air purifier 100; Dust sensor 410 is used for calculating the contamination by dust degree of room air; Display part 520 can show the operating state of air purifier; Filter house 530, it can filter the room air that is inhaled into air purifier 100 inside, makes these air become pure air; Fans drive portion 540, it can control the speed of fan according to the contamination by dust degree that above-mentioned dust sensor 410 is calculated; Storage part 550 is made of the storage device as EEPROM, and storage inside the driving data of air purifier, when the power failure phenomenon occurring, can read basic data here from; Control part 500 can be controlled the action of air purifier according to the action control signal of user's input, and after the situation that instant cut-offs such as power failure occur, it can have a power failure when starting once more, and compensation is controlled and power connection control.
The shell of above-mentioned air purifier 100 is made up of the front panel 110 that is installed in the front, the rear board 210 that is installed in the back, the air draft panel 310 that is installed in the top.The front of above-mentioned air purifier 100 has formed following structure, and promptly the front air inlet 112, forms on the central part of plate 110 in front, and this front panel 110 is used to suck near the room air in the place ahead; Front lower place air inlet 114 forms in the lower end of above-mentioned front panel 110; Right side air inlet 116, it forms in the side of above-mentioned front panel 110.The back of above-mentioned air purifier 100 has formed following structure, and promptly the back air inlet 212, and it forms on the central part of plate 210 in the back, and this rear board 210 is used to suck near the room air the rear; Back lower place air inlet 214 is formed on the lower end of above-mentioned rear board 210; Left side air inlet (not shown) forms in the side of above-mentioned rear board 210.Air draft panel 310 is equipped with at the top of above-mentioned air purifier 100, has formed the exhaust outlet (not shown) on this air draft panel 310, and this exhaust outlet is used for discharging the room air that is inhaled into air purifier inside.
Therefore, above-mentioned air purifier 100 can be from the place ahead, rear, left side, right side four direction suck room air with reference to the solid arrow Fig. 2, only promptly discharges air with reference to the dotted arrow Fig. 2 in the top from a direction then.
Filter house 530 is equipped with in the back of above-mentioned front panel 110, and this filter house 530 is by the assembly of forming such as prefilter (prefilter), HEPA filter, odor removal filter, nano carbon microsphere (carbon-nano-ball) filter, removing ozone (ozone) filter, Nano Silver (nano-silver) filter etc.Be equipped with lower member the back of above-mentioned filter house 530, and promptly the fan (not shown) can be drawn into room air the inside of air purifier, and then will discharge through the air that purifies; Fans drive portion 540 is used for driving the said fans (not shown).
The dust sensor 410 of the contamination by dust degree that is used for measuring room air also is housed in the above-mentioned air purifier 100 in addition.The outside of above-mentioned filter house 530 has formed dust hole 400, and filtered portion 530 filtered airs can be fed directly in this dust hole 400, and above-mentioned dust sensor 410 just just in time is installed in the rear in above-mentioned dust hole 400.
If the fan (not shown) begins rotation, room air just can promptly flow into the inside of air purifier 100 from four direction by front air inlet 112, front lower place air inlet 114, right side air inlet 116, back air inlet 212, back lower place air inlet 214, left side air inlet (not shown) and dust hole 400 so.At this moment, the room air that sucks from above-mentioned four direction is illustrated in when flowing through filter house 530 with solid arrow, and wherein each kind of dust and peculiar smell etc. can be filtered out.Represent then can not flow through above-mentioned filter house 530 by the room air that above-mentioned dust hole 400 flows into black arrow, but directly flow to dust sensor 410.Therefore above-mentioned dust sensor 410 can be measured the dustiness of the room air of filtered, and promptly room air is the dustiness aspect the dust (below be referred to as " contamination by dust degree ").
In above-mentioned example of the present invention, special in order to measure the contamination by dust degree of room air in the dust hole 400 that is provided with on the air purifier 100 except that above-mentioned air inlet, in 400 back, dust hole dust sensor 410 has been installed then.But in fact also above-mentioned dust hole 400 can be set specially, that is to say and dust sensor 410 only is installed to measure the contamination by dust degree of room air.In this case, above-mentioned dust sensor 410 can be installed on following positions, for example can be installed in the place ahead of filter house 530, also can be installed in the cubic air inlet some air inlets for example left side air inlet (not shown) near.In a word, as long as the place that the room air that can make above-mentioned dust sensor 410 be in filtered is flowed through, any position can.
Above-mentioned dust sensor 410 is the quantity of the dust that is used for detecting in the room air and contained, and the device that the contamination by dust degree is calculated, the cumulative time that setting-up time section inner sensor is detected dust is considered as the contamination by dust degree with the ratio of above-mentioned setting-up time usually.For example, can be made as above-mentioned setting-up time 30 seconds, calculate then that dust sensor 410 detects the cumulative time of dust and 30 seconds ratio in 30 second time, when this numerical value 0.046 when above, can judge that the contamination by dust degree of room air is " height "; 0.02 when above, can be judged as " in "; 0.02 when following, can be judged as " low ".Here, the contamination by dust degree mean for " height " time than " in " time dust that contained in the room air more, the contamination by dust degree for " in " time dust that contained in the room air when meaning than " low " more.
In addition, display part 520 is equipped with in the front of air purifier 100.Above-mentioned display part 520 is the devices that are used for showing the operating state of air purifier, it can show air quantity, indoor temperature, humidity and the contamination by dust degree etc. of operation mode, fan with chart (graph) or digital form, allow the user that the situation of air purifier is come into plain view.
Have a look below and adopt the air purifier that possesses dust sensor of above-mentioned example of the present invention how to drive.
If connected power supply on the air purifier 100, and the user imported the action control signal, and the fans drive portion 540 that air purifier inside is installed so will start, thus the rotation of drive fan (not shown).So, room air just can be inhaled into the inside of air purifier 100 by the air inlet in four directions shown in the solid line arrow.The room air that flow into air purifier 100 inside is when the filter house 530 of flowing through after being installed in front panel 110, and dust wherein and peculiar smell etc. can be filtered out, thereby becomes clean air.Next, these can be arranged to indoor (shown in dotted arrow) by the exhaust outlet (not shown) that forms on air draft panel 310 again through the pure air that filters.
Meanwhile, room air also can flow into dust hole 400 except that the air inlet by above-mentioned four directions flows into.Dust sensor 410 can be calculated to be the contamination by dust degree with the dust quantity in the room air of the filtered that flows into by dust hole 400, and the contamination by dust degree that draws thus can show on display part 520.
In addition, the contamination by dust degree of calculating when above-mentioned dust sensor 410 is during for " height ", and control part 500 can be according to this situation, is that air quantity is adjusted to " by force " with the rotary speed of fan (not shown); When the contamination by dust degree be " in " time, the rotary speed of fan can be adjusted to " in "; When the contamination by dust degree is " low ", the rotary speed of fan can be adjusted to " weak ".When air quantity is " by force ", flow into air purifier 100 inside room air amount than air quantity for " in " time many, this moment room air purification speed also than " in " situation fast.
Here, when air quantity be " by force " or " in " time, if the contamination by dust degree that dust sensor 410 is calculated has been broken through boundary, for example from the state of " height " dropped to " " state, or from " " state dropped to the state of " low ", or dropped to the state of " low " from the state of " height ", air quantity is not a corresponding this situation and changing at once so, not that is to say and can change to from " by force " at once " ", or from " " change to " weak ", or change to " weak " from " by force ".But can be at setting-up time, for example keep original air quantity in 2 minutes 30 seconds, and then according to the variation of contamination by dust degree, change to change after the degree that adapts of contamination by dust degree.On the contrary, when air quantity is " weak ", if the contamination by dust degree that dust sensor 41 0 is calculated has improved, air quantity corresponding change at once so, for example be " height " for calculating the contamination by dust degree under the state of " weak " at air quantity, air quantity will become " by force " from " weak " immediately so, thereby improves the purification speed of air.
In air purifier of the present invention, the contamination by dust degree be in " height " or " in " situation under, even the dustiness of calculating once more is some decline slightly, also still keep original air quantity within a certain period of time, change air quantity according to the dustiness of after this calculating once more then.Under this working method, system can not change air quantity again and again for the variation of tackling the contamination by dust degree, therefore can prevent that locking system breaks down.On the other hand, even the dustiness of air purifier ambient air descends to some extent, but may also not descend than the air pollution degree in the territory, far field relatively, if change air quantity in this case, will certainly cause the consequence that can't thoroughly purify the air of a room, but the present invention can address this problem then.
And when the contamination by dust degree when the state of " low " upwards raises, then can change air quantity at once, therefore situation about rising at the room air pollution degree can be taked counter-measure rapidly.
Fig. 4 is the control method flow chart that possesses the air purifier of dust sensor of the present invention.
At first, if connected power supply on the air purifier (100 among Fig. 2), and the user has imported the action control signal, whole system will begin to suck the decontamination cycle of air → filtration → discharge air so, meanwhile, control part (500 among Fig. 3) can be according to the action (S100 stage) of corresponding signal control air purifier.
Dust sensor (410 among Fig. 2) will for example just be started working after the time about 3 minutes (S110 section) through one period sensor quiescent time after air purifier is connected power supply.Control part can detect the sensitive time of dust based on sensor, calculates the dustiness (S120 stage) of room air.Here, the cumulative time that usually setting-up time section inner sensor is detected dust is considered as the contamination by dust degree with the ratio of above-mentioned setting-up time.For example, can be made as above-mentioned setting-up time 30 seconds, calculate then that dust sensor (410) detects the cumulative time of dust and 30 seconds ratio in 30 second time, when this numerical value 0.046 when above, can judge that the contamination by dust degree of room air is " height "; 0.02 when above, can be judged as " in "; 0.02 when following, can be judged as " low ".Here, the contamination by dust degree mean for " height " time than " in " time dust that contained in the room air more, the contamination by dust degree for " in " time dust that contained in the room air when meaning than " low " more.
Next, judge the contamination by dust degree of calculating be " height " or " in " (S130 stage), if the contamination by dust degree is " height ", so correspondingly the air quantity of air purifier is adjusted to " by force "; If the contamination by dust degree be " in ", so correspondingly air quantity is adjusted into " in " (S140 stage).If under the contamination by dust degree condition with higher of room air, the air quantity of air purifier is also adjusted to stronger level, so just more air can be drawn into air purifier inside and also be filtered, therefore can reduce the dustiness of room air at short notice.
On the other hand, before leading to the power interruptions of air purifier, no matter whether air purifier drives, above-mentioned dust sensor all can detect the dust of room air always according to some cycles, and control part can calculate the contamination by dust degree according to some cycles in view of the above.If judging the contamination by dust degree after the stage at above-mentioned S140 has descended (S150 stage), so just at setting-up time, for example keep original air quantity (S160 stage) in the time about 2 minutes and 30 seconds, then after the above-mentioned setting-up time of process, according to the contamination by dust degree of newly calculating, correspondingly change the air quantity (S170 stage) of air purifier.
Here, when air quantity be " by force " or " in " time, if the contamination by dust degree of newly calculating has been broken through boundary, for example from the state of " height " dropped to " " state, or from " " state dropped to the state of " low ", or dropped to the state of " low " from the state of " height ", air quantity is not a corresponding this situation and changing at once so, not that is to say and can change to from " by force " at once " ", or from " " change to " weak ", or change to " weak " from " by force ".But can be at setting-up time, for example keep original air quantity in 2 minutes 30 seconds, and then according to the variation of contamination by dust degree, change to change after the degree that adapts of contamination by dust degree.
That is to say, in air purifier of the present invention, the contamination by dust degree be in " height " or " in " situation under, even the dustiness of calculating once more some decline slightly, also still keep original air quantity within a certain period of time, change air quantity according to the dustiness of after this calculating once more then.Under this working method, system can not change air quantity again and again for the variation of tackling the contamination by dust degree, therefore can prevent that locking system breaks down.On the other hand, even the dustiness of air purifier ambient air descends to some extent, but may also not descend than the air pollution degree in the territory, far field relatively, if change air quantity in this case, will certainly cause the consequence that can't thoroughly purify the air of a room, but the present invention can address this problem then.
Below said process is described further.
If air purifier begins to drive, will begin to suck room air so, filtered last decontamination cycle of discharging again more then.Air purifier always can at first suck the air of periphery according to its characteristic, discharges again after being filtered again.Usually under the effect of aforesaid decontamination cycle, room air begins circulation, and after a period of time of working like this, by the effect of above-mentioned air circulation, the air in the indoor Zone Full just can all be purified.
But, sometimes in air purifier, may not flow to other indoor zone through filtered air, but under the effect of the inhalation power of fan, be inhaled in the air purifier again.In this case, though also have the foul atmosphere of filtered in indoor other zone, because dust sensor can only detect the dust in the peripheral pure air, so air purifier finally can be made the judgement that dustiness reduces.
Under the inreal situation about descending of the contamination by dust degree of room air, just make the judgement that the contamination by dust degree descends like this, can bring the problem that the air in the indoor whole zone is thoroughly purified.In order to address this problem, the invention provides a kind of scheme, promptly work as air purifier and be in higher state at the contamination by dust degree, for example " height " or " in " state down during operation, if detecting the contamination by dust degree descends, so just in setting-up time, continue to keep original air quantity, rather than change air quantity corresponding to the contamination by dust degree that descends immediately.Like this, just can also thoroughly be purified distance air purifier foul atmosphere at a distance.
In addition, at above-mentioned S130 in the stage, if the contamination by dust degree be not " height " or " in ", so just will be judged as " low " by the dust pollution degree, correspondingly air quantity is adjusted to " weak " (S180 stage) then.
Next, after after a while, risen (S190 stage) if judge the contamination by dust degree, different with contamination by dust degree situation from high to low so, need change the air quantity (S170 stage) of air purifier this moment immediately corresponding to the variation of contamination by dust degree.That is to say, when air quantity is " weak ", if the contamination by dust degree of newly calculating has risen, corresponding change air quantity immediately so.Just change the method for air quantity by this contamination by dust degree immediately in case rise, can tackle the rising of indoor air temperature rapidly.
Claims (7)
1, a kind of air purifier that possesses dust sensor is characterized in that, comprising: dust sensor (410) in order to calculate the contamination by dust degree of room air, is installed on the position that the air of filtered flows; Filter house (530) can filter and be inhaled into the inner room air of air purifier (100), makes these air become pure air; Fans drive portion (540) can control the speed of fan according to the contamination by dust degree that calculate above-mentioned dust sensor (410); Control part (500) can be controlled the action of air purifier according to the action control signal of user's input, and after the situation that instant cut-offs such as power failure occur, compensation control and power connection control can have a power failure when starting once more.
2, the air purifier that possesses dust sensor according to claim 1, it is characterized in that: the dustiness of the air of the filtered that flows into for the dust hole (400) that can measure by the air purifier front, above-mentioned dust sensor (410) is installed in the rear in above-mentioned dust hole (400).
3, the air purifier that possesses dust sensor according to claim 1, it is characterized in that: the dustiness of the air of the filtered that flows into for the air inlet that can measure by air purifier, above-mentioned dust sensor (410) is installed near the above-mentioned air inlet.
4, a kind of control method that possesses the air purifier of dust sensor is characterized in that, comprising: the stage of calculating the contamination by dust degree of room air; Control the stage of the air quantity of air purifier (100) according to above-mentioned contamination by dust degree; Change the stage of air quantity, in this stage, when above-mentioned contamination by dust degree from " height " or " " level when beginning downward trend to occur, just in setting-up time, keep original air quantity, change air quantity according to the contamination by dust degree of calculating once more then, and when above-mentioned contamination by dust degree when the level of " low " begins ascendant trend to occur, then corresponding immediately change air quantity.
5, the control method that possesses the air purifier of dust sensor according to claim 4 is characterized in that: above-mentioned setting-up time is about 2 minutes and 30 seconds.
6, the control method that possesses the air purifier of dust sensor according to claim 4, it is characterized in that: the computational methods of above-mentioned contamination by dust degree are: will be within a certain period of time the ratio of dust sensor (410) cumulative time that can detect dust and above-mentioned certain hour be considered as the contamination by dust degree.
7, the control method that possesses the air purifier of dust sensor according to claim 4 is characterized in that: in the 4th, when above-mentioned contamination by dust degree is " height ", air quantity is adjusted to " by force "; When above-mentioned contamination by dust degree be " in " time, air quantity is adjusted to " in "; When above-mentioned contamination by dust degree is " low ", air quantity is adjusted to " weak ".
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| CNB2004100937720A CN100512923C (en) | 2004-11-30 | 2004-11-30 | Air purifier with dust sensor and its control method |
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- 2004-11-30 CN CNB2004100937720A patent/CN100512923C/en not_active Expired - Fee Related
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