CN103592335A - Air ion detection apparatus - Google Patents
Air ion detection apparatus Download PDFInfo
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- CN103592335A CN103592335A CN201310627826.6A CN201310627826A CN103592335A CN 103592335 A CN103592335 A CN 103592335A CN 201310627826 A CN201310627826 A CN 201310627826A CN 103592335 A CN103592335 A CN 103592335A
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Abstract
The invention discloses an air ion detection apparatus, comprising a cylindrical collection pipe (1), an amplifier box (2) accommodating an amplifier (12), a fan seat (3) accommodating a fan (3), an air-flow guiding-out pipe (4) and an ion induction electrode (5) used for capturing air ions, wherein the air inlet of the air-flow guiding-out pipe (4) is hermetically connected with an opening at the side wall of the collection pipe (1), the air outlet of the air-flow guiding-out pipe (4) is connected with the fan seat (3), and the air-flow guiding-out pipe (4) is transversely connected with the sidewall opening near the fixed end of the collection pipe (1) so as to allow air flow in the collection pipe (1) to transversely flow out. The air ion detection apparatus provided by the invention can effectively shield interfering electromagnetic fields, eliminate air-flow rotation effects and ensure no adhesion and accumulation of air impurities on the ion induction electrode, and cleaning-free long-term operation of the air ion detection apparatus is realized.
Description
Technical field
The invention belongs to air ion detection field, special, relate to a kind of can maintenance compared with the air ion detector of high-cleanness, high.
Background technology
At present, the collection of airion concentration and pick-up unit mainly contain two kinds of technology, and a kind of is plate condenser type, and a kind of is coaxial capacitance straight-line.
Plate condenser type ion harvester consists of one or more groups parallel pole, applies voltage on parallel pole, makes to form between parallel pole space electric field.When air-flow flows through from parallel pole, the positive ion in air-flow can be caught by negative electrode plate, and negative ion is caught by positive electrode plate.The electric weight that the testing circuit detection parallel electrode plate being connected with parallel pole obtains and the air containment passing through, then calculate airion concentration value.Because two cube electrodes are all in open space, be therefore vulnerable to the interference of external electromagnetic field, Measurement sensibility and precision are all poor.
Some air ion sensor systems bend to tubular coaxial configuration by collection plate and ion plate bias voltage, and outside puts a metal tub shell again, have strengthened interfere with electromagnetic field shield effectiveness on the one hand, also can be used as on the other hand gas channel.To be metal shell can have influence on measuring accuracy with respect to the current potential of plate bias voltage, collection plate to the shortcoming of this structure; In addition, between collection plate, plate bias voltage and metal shell, must there is insulating support, this insulating support is exposed in the middle of the air-flow in passage, so the dirt being very easily subject in air-flow is pasted and accumulation, slightly long or atmospheric pollution of time will cause the insulation resistance value of insulating support to decline when heavy, thus the measuring accuracy of having a strong impact on.
Coaxial capacitance straight-line ion harvester periphery is a metal circular tube, a metal bar is set as interior electrode on pipe position of center line.By apply voltage between pipe and interior electrode, can set up electric field in the space between pipe and middle intracardiac electrode.Interior electrode is generally drawn from the punching of pipe somewhere, pipe one end opening, and the other end arranges aerofoil fan.During collector work, under the effect of aerofoil fan, air-flow directly enters from circular tube open one end, from another, brings out.Coaxial capacitance straight-line ion harvester is because of interior electrode outlet line position before fan, and interior electrode outlet line will be exposed in the middle of operation air-flow, easily be polluted, and cannot guarantee stability and the precision of system long-time running; In addition, produce swirling eddy, and electric field is caught air ion with rotate path during aerofoil fan operation, this will cause ion mobility error, affect measuring accuracy.
Especially, for being arranged on the negative aeroion checkout equipment of online, long-time running in depopulated zone, field, because being frequently subject to air plankton to pollute the clean and maintenance task of bringing, equipment will consume a large amount of human and material resources.Therefore, designing a kind of negative aeroion checkout equipment of exempting to clean is significant.
Summary of the invention
Based on above-mentioned deficiency of the prior art, the object of this invention is to provide a kind of air ion detector having compared with high-cleanness, high.This device has been strengthened the shield effectiveness to interfere with electromagnetic field, has improved equipment contamination resistance, can accomplish to exempt to clean, and can guarantee for a long time measuring accuracy and the stability of equipment when equipment is worked out of doors., when ion trap copper rod suffers accidental damage, can to ion trap copper rod, change simply meanwhile, greatly reduce maintenance difficulties and cost.
According to an aspect of the present invention, provide a kind of air ion detector, having comprised: collection tube 1, form tubular, its stiff end is dismountable to be fixed on amplifier box 2; Amplifier box 2, for holding and guard amplifier 12; Fan base 3, for holding and fan attachment 7, is connected to the air outlet place of air-flow delivery line 4; Air-flow delivery line 4, its air inlet is sealably coupled to the sidewall opening of collection tube 1, and air outlet is connected to fan base 3; Ion induction electrode 5, is arranged on vacant state on the position of center line of collection tube 1, and dismountable stiff end place that is fixed on collection tube 1, one end, for catching air ion; Fan 7, is arranged in fan base 3, as air driver, makes air-flow turnover; Amplifier 12, is arranged in amplifier box 2 and is connected to ion induction electrode 5, for the signal of ion induction electrode 5 outputs is amplified to processing; Wherein, described air-flow delivery line 4 is laterally connected near the sidewall opening described collection tube 1 stiff end, and the air-flow in collection tube 1 is laterally flowed out.
Preferably, described air-flow delivery line 4 forms the curved delivery line of quarter bend, forms two right-angle turnings together with collection tube 1.
Preferably, the distance of described air-flow delivery line 4 between the sidewall opening position of collection tube 1 and insulation plunger surface is within the scope of 10-20mm.
Preferably, described ion induction electrode 5 is fixed on insulation plunger 8, on the dismountable sidewall that is fixed to amplifier box 2 of insulation plunger 8.
Preferably, described insulation plunger 8 screw threads are fastened to the inner periphery of a securing member 6, and the screw thread of the excircle of securing member 6 is fastened to the inner periphery of collection tube 1 stiff end.
Preferably, the copper rod that described ion induction electrode 5 is surface gold-plating.
Preferably, described ion induction electrode 5 one end touch the spring probe 11 on amplifier 12, to be electrically connected to amplifier 12.
Preferably, the unsettled one end of described ion induction electrode 5 is processed with cross recess.
Preferably, described air ion detector adopts vertical mounting means, makes collection tube 1 and ion induction electrode 5 remain vertical direction.
The air ion quantity computing formula that described air ion detector detects is:
Wherein: n is the amount of ions of catching; I is the current value by collection tube; E is Single Electron electric weight 1.6*10
-19storehouse; P=S * v is for being sampled air throughput, unit: m
3/ s; Wherein v is the flow velocity of air in collection tube; S=π (r
1 2-r
2 2), air sampling channel cross-sectional area, unit: m
2; R1 is the inside radius of collection tube 1, unit: m; R2 is the radius of ion induction electrode 5, unit: m.
The invention has the beneficial effects as follows, adopt coaxial capacitance formula air ion collection and detection architecture to have good theoretical foundation, formula calculated value and actual measured value high conformity; Employing has good interfere with electromagnetic field shield effectiveness with the coaxial configuration of collection tube and ion induction electrode, can accurately catch by the air ion in pipe electric capacity, realizes high-acruracy survey; Adopt the air-flow buffer delivery line of right-angle structure can eliminate flow rotation effect, improve measuring accuracy; Sidewall at collection tube is outputed air port, substantially realized capture electrode and without air plankton, pasted and accumulation, and capture electrode be by the fixing demountable structure of nut, and be convenient to clean or replacing, maintainer is without opening cover, and simple operation is simple.Therefore this device has superpower contamination resistance, and long-term continuous working is out of doors very simple to its maintenance.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 has shown the front elevation of air ion detector of the present invention;
Fig. 2 has shown the stereographic map of air ion detector of the present invention;
Fig. 3 has shown air ion detector rear view of the present invention;
Fig. 4 has shown the air flow direction schematic diagram of air ion Jian Ce Zhuan Ge of the present invention;
Fig. 5 has shown ion induction electrode and the insulation plunger scheme of installation of Ben Faming dress Ge;
Fig. 6 has shown the amplifier box structural representation of this Fa Ming Zhuan Ge.
Description of reference numerals:
1-collection tube; 2-amplifier box; 3-fan base;
4-air-flow delivery line; 5-ion induction electrode; 6-securing member;
7-fan; The 8-plunger that insulate; 9-amplifier lid;
11-spring probe; 12-amplifier.
Embodiment
For making the object, technical solutions and advantages of the present invention more cheer and bright, below in conjunction with embodiment and with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these descriptions are exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, omitted the description to known configurations and technology, to avoid unnecessarily obscuring concept of the present invention.
Fig. 1 has shown the front elevation of air ion Jian Ce Zhuan Ge of the present invention.
Fig. 2 has shown the stereographic map of air ion Jian Ce Zhuan Ge of the present invention.
Fig. 3 has shown air ion Jian Ce Zhuan Ge rear view of the present invention.
Referring to Fig. 1 to Fig. 3, air ion inspection of the present invention is surveyed dress Ge and is comprised following assembly: collection tube 1, amplifier box 2, fan base 3, air-flow delivery line 4, ion induction electrode 5, securing member 6, fan 7, insulation plunger 8 and amplifier lid 9.
As depicted in figs. 1 and 2, collection tube 1 forms tubular, as air acquisition passage.Preferred antimagnetic metal material of copper or the stainless steel of adopting of collection tube 1, to prevent that magnetization from affecting measuring accuracy.Collection tube 1 is not only as inlet channel, simultaneously as bias electrode.During Zhuan Ge operation, on collection tube 1 tube wall, apply voltage, positive aeroion or negative aeroion are adsorbed onto on the ion induction electrode 5 at collection tube 1 place, axis under the effect of electric field force.When needs gather negative aeroion, on collection tube 1, apply negative voltage; Otherwise, when needs gather positive aeroion, on collection tube 1, apply positive voltage.Between ion induction electrode 5 and collection tube 1 wall, form coaxial capacitance, catch electric field and be based upon in cavity between the two.Meanwhile, the collection tube 1 of metal material has very strong electromagnetic-field-shielded effect, can effectively shield the interference of external electromagnetic field, makes catching with sensing of air ion more reliable and more stable.
As shown in Figure 2, collection tube 1 one end openings are air intake opening, are suspended in air; The other end is stiff end, for example, by securing member 6, be fixedly attached on the sidewall of amplifier box 2.Further, near amplifier box 2 one end, near the stiff end of collection tube 1, on sidewall, be provided with collection tube air outlet, this collection tube air outlet docks with the air intake opening of air-flow delivery line 4.Docking mode preferably adopts sealing docking, so that air-flow collecting efficiency is more excellent, but the present invention is not restricted to this, also can adopt non-tight docking mode, and collection air that equally can be good.By this sidewall opening structure, realized the side direction water conservancy diversion of air-flow, the air that enters collection tube 1 is derived by the air-flow delivery line 4 horizontal with respect to collection tube 1, avoided the stiff end of air guide collection tube, thereby avoid air in bonding, the stiff end that is accumulated in collection tube of the impurity such as dust, affect the collection effect of ion induction electrode 5.
Air-flow delivery line 4 is laterally connected to the sidewall of collection tube 1, for by the air guide fan base 3 in collection tube 1.Air-flow delivery line 4 preferably forms the curved delivery line of quarter bend, and its other end is connected to fan base 3.By said structure, extended air flow path on the one hand, play air-flow buffer effect, improve ion collecting efficiency; Making on the other hand has two right-angle turnings in whole air flow path, has eliminated the rotation phenomenon of air-flow, air-flow is derived smooth and easy, avoids airborne impurity to stick on inboard wall of tube body.
Referring to Fig. 3, to Fig. 5, ion induction electrode 5 is fixed on insulation plunger 8, and insulation plunger 8 is dismountable to be fixed on the sidewall of amplifier box 2.For example, insulation plunger 8 is fixed to the sidewall of amplifier box 2 by securing member 6.Further, the inner periphery of collection tube 1 stiff end is carved with screw thread, and insulation plunger 8 excircles are carved with screw thread, and securing member 6 forms the clamp nut that inside and outside circumference is all carved with screw thread.When ion induction electrode 5 is installed, insulation plunger 8 screw threads are fastened to the inner periphery of securing member 6, and the screw thread of securing member 6 excircles is fastened to the inner periphery of collection tube 1 stiff end.Like this, from collection tube air intake opening, insert ion induction electrode and insulation plunger, use screwdriver rotation capture electrode, insulation plunger can be screwed in clamp nut to fix.By this demountable structure, to be convenient to clean or change ion induction electrode, maintainer is without opening cover, and simple operation is simple.
Insulation plunger 8 forms column, for ion induction electrode 5 being fixed on to an end of collection tube 1.Specifically, as shown in Figure 2, the signal exit of ion induction electrode 5 passes from the centre of insulation plunger 8, until stretch out another end face 1mm left and right of insulation plunger 8.Between ion induction electrode 5 and insulation plunger 8, closely cooperate, between insulation plunger 8 and collection tube 1, it is also wringing fit, thereby make ion induction electrode 5 and insulation plunger 8 do as a whole being fixed in collection tube, ion induction electrode 5 is arranged on the position of center line of collection tube 1 with vacant state.
In Fig. 2, insulation plunger 8 exemplarily forms cylindric, to match with the cross sectional shape of collection tube 1.But the present invention is not restricted to this, insulation plunger 8 also can form xsect for the column structure of oval, square, rectangle or other shapes, so long as the cross sectional shape column insulation plunger 8 consistent with the cross sectional shape of collection tube 1, just can make the wringing fit between plunger 8 and collection tube 1 that insulate, thereby can realize object of the present invention.
Referring to Fig. 2, the ion induction electrode 5 passing from insulation plunger 8 is for example connected to signal amplifier 12(by spring probe 11 and is arranged on amplifier box 2), thus ion sense signal is exported to signal amplifier 12.
Signal amplifier 12(is referring to Fig. 6) be fixedly installed in amplifier box 2 and be electrically connected to ion induction electrode 2, for the ion sense signal of ion induction electrode 2 outputs is amplified to processing, so that follow-up signal processing apparatus carries out Treatment Analysis.Because air ion sensing signal is fainter, before this tiny signal is carried out to analyzing and processing, need to carry out signal by amplifier and amplify processing.The signal input part of signal amplifier is electrically connected to ion induction electrode 2, receives the ion sense signal of ion induction electrode 2 outputs and then amplifies processing.Signal amplifier is arranged in amplifier box 2.
As mentioned above, according to air ion detector of the present invention, when fan operation sucks sampled air, air-flow, by tubular capacitor electric field, laterally turns round and draws from side outlet.The meaning of side outlet air draft is, air-flow can be through insulation plunger from the process entering into away, airborne aqueous vapor, dust just can stained insulation plungers, and insulation plunger surface can keep clean state for a long time, so the present invention has guaranteed the long-time stability of device from structure.
Introduce the coaxial capacitance formula air ion of air ion detector of the present invention below and catch computing formula:
Wherein: n is the amount of ions of catching;
I is the current value by collection tube;
E is Single Electron electric weight 1.6*10
-19storehouse;
P=S * v is for being sampled air throughput, unit: m
3/ s; Wherein
V is the flow velocity of air in collection tube;
S=π (r
1 2-r
2 2), air sampling channel cross-sectional area, unit: m
2;
R1 is the inside radius of collection tube 1, unit: m;
R2 is the radius of ion induction electrode 5, unit: m.
From above-mentioned formula, the structure of coaxial capacitance formula air ion detector of the present invention and theoretical calculation formula coincide, and actual measured value and formula result of calculation consistance are good.
Fig. 4 has shown the air flow direction schematic diagram of air ion detector of the present invention.
As shown in Figure 4, ion induction electrode 5 one end, by tightening together with insulation plunger 8, then are fixed on collection tube 1 together, and the other end is suspended in the air in collection tube 1, and air ion is fully contacted with ion induction electrode 5.
Air ion detector of the present invention adopts horizontal air exhausting structure, and its major advantage is to produce the aspiration of negative pressure function.Specifically, air-flow delivery line 4 is laterally connected to collection tube 1 near the sidewall of insulation plunger 8 one end, forms horizontal air outlet.Fan rotates and makes to produce air negative pressure in air-flow delivery line 4, in collection tube 1, air draught goes out collection tube 1 in air-flow delivery line 4 opening part transverse attractive, make to insulate near plunger 8 and will produce negative pressure, negative pressure makes the dust insulating on plunger 8 and ion induction electrode 5 to the direction motion that departs from insulation plunger, and the inhaling air being continued flows delivery line 4 and then is discharged from the outside of air ion detector.Dust movement locus on insulation plunger 8 and ion induction electrode 5 is referring to the dotted arrow H in Fig. 4.Therefore, air ion detector of the present invention, as long as start operation will produce lasting automatic cleaning action to insulation plunger 8 and ion induction electrode 5, has obviously extended effective work duration of air ion detector, has reduced the cost of safeguarding cleaning.
Further, air ion detector of the present invention preferably adopts vertical mounting means, make collection tube 1 and ion induction electrode 5 remain vertical direction, E field polarization direction is horizontal direction, insulation plunger 8 is at the top of gas channel (collection tube 1), make air draught vertically upwards enter all the time collection tube 1, in the time will approaching insulation plunger 8, will laterally derive by air-flow delivery line 4, make dust cannot rely on gravity to be accumulated in the surface of insulation plunger 8 and ion induction electrode 5, thereby further guarantee to insulate plunger 8 and ion induction electrode 5 can pollution of circulation things, long-term maintenance is clean.Preferred, insulation plunger 8 adopts the insulating material of repellency, makes dust more cannot be attached to the surface of insulation plunger 8.
Therefore, air ion detector of the present invention there is automatically cleaning ability, can guarantee in rugged surroundings, to move for a long time, be difficult for dirty, needn't frequent clean, greatly extended effective work duration of air ion detector, reduced the cost of safeguarding cleaning.
Further, for obtaining more excellent self-cleaning performance, the distance in the present invention between the side air-out aperture position of air-flow delivery line 4 and insulation plunger surface is within the scope of 10-20mm, and an exemplary preferred value is 16mm.Insulation plunger surface is more easily subject to the pollution of sampled air from air outlet close to more; On the other hand, if position is too far away, need to extend the length of ion induction electrode, long induction electrode will be introduced external disturbance, cause signal to noise ratio (S/N ratio) variation.
Fig. 5 has shown ion induction electrode and the insulation plunger scheme of installation of apparatus of the present invention.
As shown in Figure 5, ion induction electrode 5 is re-used as a global facility and is installed in collection tube 1 after first fixing between the two with insulation plunger 8, and ion induction electrode 5 is arranged on the position of center line of collection tube 1 with vacant state.Ion induction electrode 5 air intake openings end face is on one side processed with cross recess, can use screwdriver that ion induction electrode 5 is screwed in the securing member 6 of amplifier box 2.Ion induction electrode 5 and insulation plunger 8 are as the vitals that affects measuring accuracy, when meeting with damage, use screwdriver that ion induction electrode 5 is rotated and back-outed together with insulation plunger 8, and directly back-out from collection tube 1 air intake opening, be convenient to clean or change, maintainer is without opening cover, and simple operation is simple.
Fig. 6 has shown the amplifier box structural representation of apparatus of the present invention.
As shown in Figure 6; amplifier 12 is arranged in amplifier box 2; amplifier box 2 can adopt insulation material or metal material; with the work of guard amplifier 12, avoid disturbing; preferably; amplifier box 2 when adopting metal material to form, can make amplifier box 2 have stronger effectiveness, guarantees that signal is undistorted.Amplifier 12 is for example connected on the ion induction electrode 5 that passes of insulation plunger 8 by spring probe 11, thereby obtains the ion signal that 5 transmission of ion induction electrode come and amplify processing, so that follow-up signal treating apparatus carries out Treatment Analysis.When ion induction electrode 5 is tightened, ion induction electrode 5 end contacts are to the spring probe 11 on amplifier 12, and make spring probe 11 keep the compression of half left and right, like this when ion induction electrode 5 captures air ion, airion concentration signal will be passed to and on amplifier 12, be amplified processing by spring probe 11.This unjointed connected mode is batch production, installation, maintenance, bringing convenience property of maintenance.
In sum, the scavenging air ion detection device of exempting from of the present invention, adopts with collection tube 1 and the coaxial configuration of ion induction electrode 5 and has good interfere with electromagnetic field shield effectiveness, can accurately catch by the air ion in pipe electric capacity, realizes high-acruracy survey; Adopt air-flow delivery line 4 can eliminate flow rotation effect, improve measuring accuracy; Sidewall at collection tube 1 is outputed air port, has substantially realized stickup and the accumulation of capture electrode 5 without air plankton; And ion induction electrode 5 is for to fix 6 demountable structure by nut, is convenient to clean or change, maintainer is without opening cover, and simple operation is simple.
Should be understood that, above-mentioned embodiment of the present invention is only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore any modification of, making, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in without departing from the spirit and scope of the present invention in the situation that.In addition, claims of the present invention are intended to contain whole variations and the modification in the equivalents that falls into claims scope and border or this scope and border.
Claims (10)
1. an air ion detector, comprising:
Collection tube (1), forms tubular, and its stiff end is dismountable to be fixed on amplifier box (2);
Amplifier box (2), for holding and guard amplifier (12);
Fan base (3), for holding and fan attachment (7), is connected to the air outlet of air-flow delivery line (4);
Air-flow delivery line (4), its air inlet is sealably coupled to the sidewall opening of collection tube (1), and air outlet is connected to fan base (3);
Ion induction electrode (5), is arranged on vacant state on the position of center line of collection tube (1), and dismountable stiff end place that is fixed on collection tube (1), one end, for catching air ion;
Fan (7), is arranged in fan base (3), as air driver, makes air-flow turnover;
Amplifier (12), is arranged in amplifier box (2) and is connected to ion induction electrode (5), for the signal of ion induction electrode (5) output is amplified to processing;
Wherein, described air-flow delivery line (4) is laterally connected near the sidewall opening described collection tube (1) stiff end, and the air-flow in collection tube (1) is laterally flowed out.
2. air ion detector according to claim 1, described air-flow delivery line (4) forms the curved delivery line of quarter bend, forms two right-angle turnings together with collection tube (1).
3. air ion detector according to claim 1, described air-flow delivery line (4) in the sidewall opening position of collection tube (1) and the distance between insulation plunger surface within the scope of 10-20mm.
4. air ion detector according to claim 1, it is upper that described ion induction electrode (5) is fixed to insulation plunger (8), on the dismountable sidewall that is fixed to amplifier box (2) of insulation plunger (8).
5. air ion detector according to claim 4, described insulation plunger (8) screw thread is fastened to the inner periphery of a securing member (6), and the screw thread of the excircle of securing member (6) is fastened to the inner periphery of collection tube (1) stiff end.
6. air ion detector according to claim 1, described ion induction electrode (5) is the copper rod of surface gold-plating.
7. air ion detector according to claim 1, described ion induction electrode (5) one end touches the spring probe (11) on amplifier (12), to be electrically connected to amplifier (12).
8. air ion detector according to claim 1, the unsettled one end of described ion induction electrode (5) is processed with cross recess.
9. according to the air ion detector described in any one in claim 1-8, described air ion detector adopts vertical mounting means, makes collection tube (1) and ion induction electrode (5) remain vertical direction.
10. according to the air ion detector described in any one in claim 1-8, the air ion quantity computing formula that described air ion detector detects is:
Wherein: n is the amount of ions of catching;
I is for passing through the current value of collection tube (1);
E is Single Electron electric weight 1.6*10
-19storehouse;
P=S * v is for being sampled air throughput, unit: m
3/ s; Wherein
V is the flow velocity of air in collection tube (1);
S=π (r
1 2-r
2 2), air sampling channel cross-sectional area, unit: m
2;
R1 is the inside radius of collection tube (1), unit: m;
R2 is the radius of ion induction electrode (5), unit: m.
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|---|---|---|---|
| CN201310627826.6A CN103592335A (en) | 2013-11-29 | 2013-11-29 | Air ion detection apparatus |
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|---|---|---|---|
| CN201310627826.6A CN103592335A (en) | 2013-11-29 | 2013-11-29 | Air ion detection apparatus |
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| CN105928994A (en) * | 2016-04-26 | 2016-09-07 | 徐先 | Full-automatic air ion testing method and device |
| CN111683735A (en) * | 2018-01-27 | 2020-09-18 | 丽萨·索兰基 | Device for removing polar molecules from a gas stream |
| CN109725047A (en) * | 2019-02-21 | 2019-05-07 | 北京沃斯彤科技有限公司 | A kind of more mobility air ion detection devices |
| CN110044996A (en) * | 2019-05-28 | 2019-07-23 | 南京信息工程大学 | Atmosphere negative ion concentration detection device |
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Application publication date: 20140219 |