CN85201171U - Instrument for detecting the anions in air - Google Patents

Abstract

The utility model relates to an instrument for detecting anions in air, which belongs to the technical field of the application of electronic technology. The utility model needs to solve the technical problem that air anions with high concentration contained by the detected air are required to be detected. The utility model directly utilizes the potential energy of charged ions in the detected air to the ground to cause a metal conductor to be charged, and the leakage current is generated to the ground. The current is extremely tiny, and the tiny current is amplified and displayed to reflect whether the detected air contains the anions with high concentration or not. The utility model is directly used for detecting the working conditions of an air anion generator which is applied to medical care.

Description

Instrument for detecting the anions in air

The negative aeroion verifier belongs to the application electric technology field.

The people that the negative aeroion of the high concentration that application of air anion generator or negative oxygen ion generator send is cured the disease and kept healthy is more and more.Is but whether a generator producing negative ion all the time under working condition? this is the user of anion generator and the problem that manufacturer all is concerned about very much.The object of the present invention is to provide a kind of cheapness, easy verifier.It can check out the negative ion that whether contains high concentration in the tested air, and then checks out the working condition of anion generator intuitively, exactly.

Content of the present invention sees also accompanying drawing.

Among the figure, Q is tested air.A is the charge-trapping bar.BB ' is the electrostatic screening net around charge-trapping bar A, electrical grounding.R1 is a bleeder resistance.C ' divides electric capacity for the T1 input end.T1 is the field effect transistor of high input resistance, and D ' is a T1 input protection diode, and T2 is a triode.D1, D2 are current-limiting resistance.K is a switch, and E is a power supply.

The T1 quiescent point is in saturation conduction, and voltage is lower between source, drain electrode, and T2 ends, and D1 is not luminous, D2 luminous power supply situation that is used to refer to when K connects.When tested air Q contains the negative ion of high concentration, negative electromotive force will be had over the ground.This electromotive force will become to making airborne negative charge to move to having earthy charge-trapping bar A, and be collected by A.Flow through small leakage current in R1, two ends produce relatively negative voltage.If the contained negative ion concentration of air Q is enough big, the negative voltage at R1, C ' two ends will make the T1 electric current reduce so that end, then T2 conducting, and D1 is luminous.Indicate the negative ion that contains high concentration in the air with this.If do not contain negative ion in the tested air or negative ion concentration is very low, lower at the voltage at R1, C ' two ends, deficiency is so that the T2 conducting, and then the D1 luminotron can be not bright.This verifier is checked out the negative ion that whether contains high concentration in the air by this method, and then the working condition of check anion generator.

Detection method proposed by the invention and traditional condenser type ion trap are collected the electric charge method and are compared adding under the permanent electric field, can make the verifier cost very low, volume has only the cigarette case size, use also very convenient, this be well suited for anion generator in producing in batches check and the user of anion generator use.

The implementation that the utility model is best, A adopts φ 3 * 20mm red copper, surface gold-plating.BB ' employing 16 order copper mesh, plane separation A distance of shaft centers are from 5～7mm, R ₁=10 ¹²Ω T1, D ' use 3DO7B.R2＝100K。T2 is 3DM3C.Shell F uses betal can be benefit.In this case, verifier D1 begins that the negative ion concentration corresponding to air Q is 5 * 10 when luminous ⁵Individual/Gm ³The big I that changes BB ' mesh influences the sensitivity of verifier.At present commercially available anion generator nominal concentration is generally all 10 ⁶Individual/Gm ³More than.Therefore, use, join value by above-mentioned parameter as the check air negative ion generator.Be proper.

Claims (4)

1, in the check air, whether contains the verifier of high-concentration anion in the air of particularly checking air negative ion generator to send.This verifier is contained in the metal shell F of cigarette case size, and its uplifting window mouth covers net BB ' to expose.The feature of this verifier is:

1. in the described shell F negative aeroion gathering-device is arranged, constitute by collecting bar A and shielding its outer gauze screen BB '.

2. collect to connect behind the bar A and be used for amplifying the electronic circuit of demonstration.

2, verifier according to claim 1 is collected bar A, is manufactured by the filled gold material that surface conduction is good, is installing the high-insulation with shell F.

3, according to claim 1,2 described verifiers, gauze screen BB ' is around collecting bar A, meets shell F on electric, gets final product electrostatic screening, and tested air is passed through, and is collected bar A and collects.

4, according to claim 1,2,3 described verifiers, collect the amplification that connects behind the bar A, show electronic circuit, field effect transistor T1 by high input resistance, super β triode T2 and associate member thereof constitute, and amplify and collect the atomic weak current that bar A collects, and driven for emitting lights diode D1 shows.

Images