CN101339152A - Gas sensor - Google Patents
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- CN101339152A CN101339152A CNA2008101456887A CN200810145688A CN101339152A CN 101339152 A CN101339152 A CN 101339152A CN A2008101456887 A CNA2008101456887 A CN A2008101456887A CN 200810145688 A CN200810145688 A CN 200810145688A CN 101339152 A CN101339152 A CN 101339152A
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Abstract
The invention provides a gas sensor which comprises a sensor body provided with a steam through-hole. The sensor body is connected with a cavity which is communicated with the steam through-hole and filled with liquid; the cavity is provided with a separator which is used for separating the liquid and the steam through-hole and for infiltrating the steam. Because of the arrangement of the separator in the cavity, only the steam can be infiltrated between the cavity and the sensor; the liquid can not be infiltrated between the cavity and the sensor; thus the temperature and humidity required by the sensor are guaranteed. Because of the capability of infiltrating the steam and the incapability of infiltrating the liquid, the gas sensor can be arranged freely; the range of application is broadened; for example, the gas sensor can be moved, carried by a vehicle and used in other aspects; thus the gas sensor is suitable for various environments for human beings.
Description
Technical field
The present invention relates in particular to a kind of electrochemical gas sensor about sensor device.
Background technology
Gas sensor is to be used to detect the sensing equipment that certain specific gas exists, as detecting gases such as carbon monoxide, sulfuretted hydrogen, sulphuric dioxide, hydrogen or ethanol.Especially current environment is protected and living safety, and these detections harmful or hazardous gas seem more and more important.
Aspect environmental protection, the atmospheric pollution in industrialization city is comparatively serious mostly, and for example sulfuretted hydrogen and sulphuric dioxide are exactly main atmosphere pollution.It is in automobile, the fuel combustion of aircraft tail gas, and produces in the plastic garbage burning process, and the sulfuretted hydrogen of low concentration and sulphuric dioxide are just harmful to health.Aspect living safety, carbon monoxide poisoning event happens occasionally.Therefore, the sensor that is used for these toxic gases arises at the historic moment.Detected gas has a lot of methods, wherein decide current potential current mode electrochemical gas sensor wide, cheap with its measuring accuracy height, the scope of application, be easy to advantages such as field monitoring and be subject to people's attention.
The current mode electrochemical sensor utilizes carbon monoxide (CO), the formaldehyde electrochemical oxidation size of current of micromolecule under certain potentials such as (HCHO) to measure its compound concentrations, and its principle is identical with fuel cell.
Sensor early has poromeric electrochemical sensor of General Electric (GE) company, for example the U.S. the 3rd, 149, a kind of room temperature air sensor of No. 921 patents, as shown in Figure 1, it comprises a reaction chamber 40, has a reaction chamber 82 in this reaction chamber 40, and reaction chamber 82 offers an oxygen intake 42, outlet 44 and hydrogen inlet 81.The sidewall of reaction chamber 40 is provided with two catalysis electrodes 48 and 50, and is located in the amberplex 52 between this two electrode 48,50.Electrode 48 and 50 and amberplex 52 press between two packing rings 46,54.Wherein hydrogen inlet 81 is connected with a hydrogen storage capsule 76.Amberplex 52 is a cation-exchange membrane.Electrode 48,50 can be selected platinum electrode for use.
The principle of work of above-mentioned electrochemical sensor is a primary element reaction in fact, the concrete course of work is as follows: hydrogen 81 enters reaction chamber 82 and is adsorbed on the catalysis electrode 48 by entering the mouth, and oxygen 42 enters reaction chamber 82 and is adsorbed on the catalysis electrode 50 by entering the mouth.Hydrogen and oxygen generating electrodes reaction on two electrodes 48,50 respectively then, thus electric current between them, formed.Measure the dividing potential drop of oxygen by measuring size of current.
Solid electrolyte amperometric sensor the earliest was at report in 1984, specifically see also Miura N, Kato H, Ozaw Y, people such as Yamazoe N " chemical wall bulletin " deliver on (Chem.Lett.) about a kind of paper that is used for detecting the sensor of CO gas.Present topmost solid electrolyte is the Nafion film.Because hydrionic migration must have in film under the situation of water and could realize in the Nafion film, thus all these classes all solid state sensor of using the Nafion films than the easier dehydration of sensor of liquid state entirely and the life-span shorter.
For solving the problem of water consumption, the people is arranged when this class sensor of design, water tank directly is set below the bottom electrode of sensor main body, guarantee that the water cut of film is constant.As shown in Figure 2, the sensor 10 that typically has a water tank comprises housing 12.Housing 12 inner stacks are provided with upper cover plate 14, packing ring 16, diffusion layer 18, two plastic spacers 20 and 22, membrane electrode assembly 24 and base plates 26.Below base plate 26, has a water tank 40.Upper cover plate 14 and base plate 26 offer through hole 15 and 42 respectively.Because through hole 42 directly is connected with water tank 40 in this sensor 10, between water and the membrane electrode assembly 24 without hindrance every.When if situation such as sensor inversion takes place, will cause the water logging of 40 li in the water tank of sensor 10 not have the Nafion film, then can not monitoring objective gas, therefore can only vertically install and use, usable range is restricted.
Summary of the invention
In view of this, be necessary to provide the comprehensive placement of a kind of energy, the electrochemical gas sensor that usable range is wide.
A kind of gas sensor, comprise the sensor main body that offers the steam through hole, described sensor main body is connected with the cavity that communicates with the steam through hole, and described cavity stores liquid, be provided with in the described cavity with liquid and the steam through hole is isolated and the infiltration steam separator.
Compared with prior art, described gas sensor is provided with separator in cavity, therefore, and saturating steam between cavity and the sensor main body and impenetrable liquid, thereby required temperature and humidity when guaranteeing sensor main body work.Just because the saturating steam of separator and liquid-tight performance, thus can comprehensive placement gas sensor, widen its usable range, multi-angle such as for example removable, vehicle-mounted is used, and is suitable for all kinds of human settlements.
Description of drawings
Fig. 1 is the gas sensor configuration synoptic diagram that early uses.
Fig. 2 is existing gas sensor configuration synoptic diagram with water tank.
Fig. 3 is the gas sensor configuration synoptic diagram that first embodiment of the invention provides.
Fig. 4 is the decomposition texture synoptic diagram of the gas sensor among Fig. 3.
Fig. 5 is the gas sensor configuration synoptic diagram that second embodiment of the invention provides.
Fig. 6 is the gas sensor configuration synoptic diagram that third embodiment of the invention provides.
Fig. 7 is the gas sensor configuration synoptic diagram that fourth embodiment of the invention provides.
Fig. 8 is the gas sensor configuration synoptic diagram that fifth embodiment of the invention provides.
Fig. 9 is the gas sensor configuration synoptic diagram that sixth embodiment of the invention provides.
Figure 10 is the gas sensor configuration synoptic diagram that seventh embodiment of the invention provides.
Figure 11 is the gas sensor plan structure synoptic diagram that eighth embodiment of the invention provides.
Figure 12 is the cross-sectional view along G-G line among Figure 11.
Figure 13 and Figure 11 are basic identical, demonstration be the gas sensor configuration synoptic diagram that adopts barrier film.
Figure 14 and Figure 13 are basic identical, and demonstration is the structural representation of the gas sensor of the barrier film outlet of being located at fluid storage compartment.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 3 and 4, the gas sensor 100 that provides for first embodiment of the invention.The cavity 130 that this gas sensor 100 comprises sensor main body 110 and is attached thereto.Sensor main body 110 along its axially comprise the induction electrode 112 of mutual stacked setting, to electrode 114, exchange membrane 113 between this two electrode 112 and 114, and be arranged at first catalyst layer 115 between induction electrode 112 and the exchange membrane 113, be arranged at second catalyst layer 116 between electrode 114 and the exchange membrane 113, be provided with carbon film 117a between this first catalyst layer 115 and the induction electrode 112, second catalyst layer 116 and to being provided with carbon film 117b between the electrode 114.
Electrode 114 directly is connected with cavity 130, and is offering steam through hole 114a near cavity 130 places, this steam through hole 114a communicates with cavity 130.Steam through hole 114a also can be a circular port or square opening.The steam that produces in the cavity 130 can contact with second catalyst layer 116 and carbon film 117 by steam through hole 114a.In the present embodiment, are the housings of accommodating each element in the sensor main body 110 to electrode 114, promptly electrode 114 is contained the side of each element from the bottom of sensor main body 110 and coat the periphery of induction electrode 112.Electrode 114 is formed an opening 114b beyond through hole 112a, this opening 114b and through hole 112a and steam through hole 114a are coaxial, and the size of opening 114b is greater than the size of through hole 112a.For electrical signal transfer is extremely outside,, adopt conductive lead wire 141 and 142 to be electrically connected respectively with induction electrode 112 with to electrode 114 and external measurement device with the detected gas sensing result.
Sensor main body 110 each element periphery and as housing to electrode 114 between be filled with O-ring seal 118, sealing circle 118 is close to the inwall to electrode 114 as housing, its cross sectional shape roughly is similar to the shape to electrode 114.Periphery at two carbon film 117a, 117b is respectively equipped with support ring 119a and 119b.Support ring 119a and 119b adopt hard plastics, and the periphery of exchange membrane 113 is pressed between two support ring 119a and the 119b.Because it is wrinkling that exchange membrane 113 is easy to, thereby can make exchange membrane 113 be in exceptionally straight state by the effect of pressing of support ring 119a and 119b, be difficult for producing phenomenons such as wrinkling or lax.Support ring 119, induction electrode 112, exchange membrane 113, two carbon film 117a, 117b and two catalyst layers 115,116 are pressed in the O-ring seal 118.Exchange membrane 113 can be GEFC-10N full fluorin proton exchange film or inclined to one side fluorine PEM such as Kynoar grafted polystyrene sulfonic acid proton exchange film.O-ring seal 118 can be hydrophobicity plastic cement, rubber or resin material.The material of catalyst layer 115,116 adopts precious metal-based catalysis materials such as Pt/ C.Carbon film 117a and 117b can select carbon nano-tube film or common carbon paper for use.
O-ring seal 118 corresponds respectively to steam through hole 114a, 114b and is provided with perforate 118a and 118b.O-ring seal 118 tops are pressed on the marginal portion of induction electrode 112, thereby can utilize the elasticity of induction electrode 112 to upwarp structure, and each element in the sensor main body 110 is fitted tightly together under pressure.Through hole 112a, opening 114b and perforate 118b are coaxial, and the aperture of opening 114b and perforate 118b provides enough cushion spaces greater than the aperture of through hole 112a so that enter steam through hole 114a to gas.In addition, the lead-in wire 141 of induction electrode 112 also needs to pass via openings 114b and perforate 118b draws.Carbon film 117b seal and opening 118a wherein.Electrode 114 is upwarped towards exchange membrane 113 at the middle body around steam through hole 114a, so that each element in sensor main body 110 has downward elastic space when bearing pressure.
The annular wall 134 that on the wall 130a of the chamber of cavity 130, extended internally, annular wall 134 be surrounded on opening 131 and steam through hole 114a around, be provided with a barrier film 140 in the end cap of annular wall 134.Accommodate water or liquid liquid 150 such as methyl alcohol, ethanol or propyl alcohol in the cavity 130.These liquid can produce the required steam of electrode reaction, as the steam of water vapour, methyl alcohol, ethanol or propyl alcohol etc.Annular wall 134 and barrier film 140 constitutes the separator that the interior liquid of steam through hole 114a and cavity 130 150 is isolated.Barrier film 140 adopts only saturating steam and the film of impenetrable liquid 150 for example can adopt PP (polypropylene)/PE (tygon) composite membrane or microporous barrier.Annular wall 134 and barrier film 140 and chamber wall 130a form a space 135 bigger with respect to opening 131 places, when cavity 130 fills liquid for example during water, water vapour will be full of whole space 135, and this space 135 promptly can be as the steam deposit space that enters in the sensor main body 110.Space 135 also can be used as a cushion space simultaneously, makes that the steam in space 135 is kept state of saturation.Therefore, even when steam consumption is too fast in detection process, space 135 also in time alimentation facies to the steam of abundance.
During use, as being subjected to sense gasses, when existing as hydrogen, carbon monoxide or sulfuretted hydrogen etc., sensor promptly begins effect.Present embodiment is example with the carbon monoxide, and contact carbon film 117a behind the carbon monoxide process through hole 112a is adsorbed in carbon film 117a, diffuses to first catalyst layer 115 then.Simultaneously, the water vapours in the space 135 are through steam through hole 114a, by carbon film 117b, second catalyst layer 116 and exchange membrane 113, then with carbon monoxide under the effect of catalyzer, the anode electrode reaction takes place:
CO+H
2O(g)＝CO
2+2H
++2e
-
By overlying electrode reaction as can be known, induction electrode 112 consume water steam produce carbon dioxide and proton, i.e. hydrogen ion, and be accompanied by the generation electronics.Thereby at the proton of exchange membrane 113 in the face of the surface formation of induction electrode 112, these protons are permeable to arrive another side, the just surfaces that contact with second catalyst layer 116 by exchange membrane 113.Under the effect of second catalyst layer 116, it is as follows that the cathode electrode reaction takes place:
2H
++2e
-＝H
2
The entire electrode reaction is as follows:
CO+H
2O(g)＝CO
2+H
2
So promptly finish the entire electrode reaction, correspondingly between two electrodes, form electric current.By being connected a stable-pressure device with 142 at lead-in wire 141, make and keep constant electrode voltage between two electrodes 112 and 114, because voltage constant, by measuring the variation of the electric current that forms between two electrodes, can record the content of gas CO, be its dividing potential drop in atmosphere, thereby realize sensing function CO.If a comparator circuit and buzzer drive circuit are set to be connected in the circuit of measurement mechanism, then the gas sensor 100 of present embodiment promptly constitutes an alarm sensor, as long as the CO content that records exceeds predetermined value, then can touch warning circuit, send alarm sound as hummer.
Similar with the sensing of CO, when being applied to gases such as other gases such as hydrogen, oxygen, formaldehyde, acetaldehyde, carbon dioxide, sulphuric dioxide or sulfuretted hydrogen, can adopt identical method for sensing and device, it is the electrode reaction difference that takes place, the variation of electric current is also inequality, but the basic structure principle is all identical with above description with operating process, does not repeat them here.
Because barrier film 140 is with each element such as the carbon film 117a and the 117b of liquid and sensor main body 110, catalyst layer 115 and 116, exchange membrane 113 isolation such as grade, no matter how gas sensor 100 is placed, for example, keep flat or vertically place gas sensor 100, even inversion gas sensor 100, promptly allow cavity 130 be positioned at the top of sensor main body 110, place howsoever, liquid can directly not contact with each element of sensor main body 110, and each element that can only be steam and sensor main body 110 is as to electrode 114, second catalyst layer 116 and exchange membrane 113 contacts.Thereby the gas sensor 100 of present embodiment is comprehensive placement, can be applicable to the more applications field.
See also Fig. 5, the gas sensor 200 that provides for second embodiment of the invention.This gas sensor 200 is similar to the gas sensor 100 among first embodiment substantially, and difference is the set-up mode etc. of sensor main body 210, cavity 230 and the barrier film 240 of present embodiment, will describe respectively at main difference below.Adopt identical label with Fig. 3 components identical among Fig. 5, and have identical 26S Proteasome Structure and Function, do not repeat them here.
The sensor main body 210 basic identical sensor main bodies 110 in Fig. 3 of present embodiment, difference mainly is electrode 214.It is identical with the position to electrode 114 among first embodiment that electrode 214 is provided with the position, and the centre also is formed with steam through hole 214a, protruding in induction electrode 112 at the center section that is formed with steam through hole 214a.Difference is, present embodiment are circular rings to electrode 214, rather than the structure among Fig. 3 as sensor main body 110 shells.The shell that surrounds sensor main body 210 each element in the present embodiment is a cavity 230.Cavity 230 comprises fluid storage compartment 231 and accommodates the reception room 232 of sensor main body 210.Fluid storage compartment 231 and reception room 232 are interconnected, and both sidewalls of fluid storage compartment 231 and reception room 232 are structure as a whole.Reception room 232 offers opening 230a in the position of the through hole 112a of corresponding induction electrode 112, and this opening 230a is similar to the opening 114b among first embodiment.The size of reception room 232 forms step 235 at both places of interconnecting thus greater than fluid storage compartment 231, and 214 at electrode is located on this step 235.
Be understandable that the barrier film 240 of present embodiment also can be with reference to the structure of the separator among first embodiment.For example, directly on to electrode 214, in fluid storage compartment 231, extend and annular wall is set (is similar to the annular wall 135 among Fig. 3, the position difference just is set), establish barrier film 240 in the end cap of annular wall then, at this moment, separator can be the structure that comprises that annular wall and lid are established the barrier film 240 on it equally.
The principle of work of the gas sensor 200 of present embodiment is equal to the principle of work of the gas sensor 100 among first embodiment basically, so do not repeat them here.
See also Fig. 6, the gas sensor 300 that provides for third embodiment of the invention.This gas sensor 300 is similar to the gas sensor 100 among first embodiment substantially, and difference is the structure of separator.Adopt identical label with Fig. 3 components identical among Fig. 6, and have identical 26S Proteasome Structure and Function, do not repeat them here.
As shown in Figure 6, be equipped with an absorbency material 340 in the cavity 130, this absorbency material 340 is the separator of present embodiment, then need not this moment such as barrier film and annular wall etc.Absorbency material 340 can be sponge or porosint such as Bio-sil etc.Absorbency material 340 can be positioned over the optional position of cavity 130, and absorbency material 340 optional positions are when placing, and the liquid in it can be maintained in the material.Liquid in the absorbency material 340 adopt effumability liquid, with produce can the generating electrodes melon steam, as water vapour, gaseous methanol, ethanol or propyl alcohol etc.Therefore, in whole cavity 130, be full of saturated steam, as water vapour.Cavity 130 is except the shared space of absorbency material 340 like this, other spaces promptly have space 135 identical functions with first embodiment, can both can be used as the steam deposit space that enters in the sensor main body 110 as this space 135, also can be used as a cushion space simultaneously.
See also Fig. 7, the gas sensor 400 that provides for fourth embodiment of the invention.This gas sensor 400 is similar to the gas sensor 200 among second embodiment substantially, and difference is the structure of separator.Adopt identical label with Fig. 5 components identical among Fig. 7, and have identical 26S Proteasome Structure and Function, do not repeat them here.
Separator in the present embodiment is identical with the separator of the 3rd embodiment, promptly comprises an absorbency material 340.At absorbency material 340 can be sponge or porosint such as Bio-sil etc.In the fluid storage compartment 231 of whole cavity 230, except absorbency material 340 occupation space, other spaces in the fluid storage compartment 231 promptly have space 135 identical functions with first embodiment, can be as this space 135, be full of steam, both can be used as the steam deposit space that enters in the sensor main body 110, also can be used as a cushion space simultaneously.
See also Fig. 8, the gas sensor 500 that provides for fifth embodiment of the invention.This gas sensor 500 is similar to the gas sensor 100 among first embodiment substantially, comprises with it similarly sensor main body 110 and cavity 130, and difference is the structure of separator.Adopt identical label with Fig. 3 components identical among Fig. 8, and have identical 26S Proteasome Structure and Function, do not repeat them here.
See also Fig. 9, the gas sensor 600 that provides for sixth embodiment of the invention.This gas sensor 600 comprises the sensor main body 210 of second embodiment and the separator 540 of cavity 230 and the 5th embodiment.Adopt identical label with Fig. 3 components identical among Fig. 9, and have identical 26S Proteasome Structure and Function, do not repeat them here.
See also Figure 10, the gas sensor 700 that provides for seventh embodiment of the invention.This gas sensor 700 comprises the sensor main body 110 of the 5th embodiment and the cavity 130 of first embodiment, and separator.Figure 10 adopts identical label with Fig. 3 components identical, and has identical 26S Proteasome Structure and Function, does not repeat them here.
In the present embodiment, separator is a liquid storing bag 740, and what present embodiment adopted is water bag.Liquid storing bag 740 can adopt with first, second embodiment in barrier film 140,240 identical materials, promptly only saturating steam and liquid-tight material for example can adopt PP/PE compound substance or microporous barrier.Accommodate water 742 in the liquid storing bag 740.Equally, placing liquid storing bag 740 to cavity 130, can carry out vacuum pumping to cavity 130 in advance, and then put into moisture liquid storing bag 740, so the 742 meeting evaporations of the water in the liquid storing bag 740 are more, promptly are full of saturated water vapour in the cavity 130, to satisfy the required water vapour of electrode reaction.
See also Figure 11 and 12, the gas sensor 800 that provides for eighth embodiment of the invention.Gas sensor 800 comprises sensor main body 210 and the cavity 830 among second embodiment.
Sensor main body 210 in the present embodiment is embedded at the part of the chamber wall of cavity 830.For example, cavity 830 has thicker sidewall 832, and sensor main body 210 promptly is embedded in the thicker sidewall 832.The surfaces externally and internally of sidewall 832 is respectively equipped with endoporus 832a and outer hole 832b, inside and outside hole 832a, the 832b also coaxial setting that is connected with the through hole 112a of sensor main body 210 and 114a respectively.
As shown in figure 12, whole gas sensor 800 presents flat structure, be disc in sensor main body 210 parts wherein, and cavity 830 parts is square.Thereby gas sensor 800 can be called side-mounted gas sensor, and this kind side located structure can fully reduce the shared space of whole gas sensor, is fit to light, the thin at present market demand, is easy to carry or places.
As shown in figure 13, the version that shows the gas sensor 800 employing barrier films 850 that the 8th embodiment provides.This barrier film 850 can be arranged at the optional position of steam channel 836, two ends or centre as steam channel 836, comprise the position that lid is as shown in figure 13 established endoporus 832a, the centre position of steam channel 836, or fluid storage compartment as shown in figure 14 835 is to the porch of steam channel 836, the just exit of fluid storage compartment 835.When barrier film 850 is set, fluid storage compartment 835 direct splendid attire water 150.
In each embodiment shown in Fig. 6-12, separator 340,540,740 and 840 places the inner space of each cavity respectively, the liquid that stores in the cavity all is included in these separators 340,540,740 and 840, for example moisture content remains in absorbency material 340 and the aqueous gelatin 540, perhaps is contained in liquid storing bag 740 and 840.The element that these separators 340,540,740 and 840 are independent respectively can be positioned in the cavity arbitrarily.
The gas sensor of above-mentioned each embodiment is provided with separator in cavity, therefore, and saturating steam between cavity and sensor main body and impenetrable liquid, thereby required temperature and humidity when guaranteeing working sensor.And above-mentioned gas sensor also has following characteristics: the one, and multi-angle such as removable, vehicle-mounted is used, and comprehensive placement is suitable for all kinds of human settlements; The 2nd, not only avoided of the infringement of liquid such as water to sensor, and also the evaporation of controlling liquid effectively, both guaranteed result of use, prolonged serviceable life again; The 3rd, dwindled sensor bulk, dwindle 1/2nd than like product; The 4th, batch making separator in advance, for example saturating steam water bag and absorbent material etc. can be prefabricated earlier, are convenient to scale produce in batches, enhance productivity.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1, a kind of gas sensor, comprise the sensor main body that offers the steam through hole, it is characterized in that described sensor main body is connected with the cavity that communicates with the steam through hole, described cavity stores liquid, be provided with in the described cavity with liquid and the steam through hole is isolated and the infiltration steam separator.
2, gas sensor as claimed in claim 1 is characterized in that, described separator is the barrier film of being located in the cavity and sealing described steam through hole.
3, gas sensor as claimed in claim 1, it is characterized in that, described separator comprises annular wall and is located at barrier film on the annular wall hermetically, and described annular wall is around extending in cavity around the steam through hole and by the chamber wall of described sensor main body or cavity.
4, gas sensor as claimed in claim 1 is characterized in that, described separator places the inner space of cavity, and the liquid that stores in the described cavity is included in the described separator.
5, gas sensor as claimed in claim 4 is characterized in that, described separator is the liquid storing bag that places the infiltration steam in the cavity, and described liquid containing is in described liquid storing bag, and described liquid can produce the required steam of electrode reaction.
6, gas sensor as claimed in claim 4 is characterized in that, described separator comprises the absorbency material that places in the cavity and can produce the required steam of electrode reaction.
7, gas sensor as claimed in claim 6 is characterized in that, described absorbency material comprises sponge or porosint.
8, gas sensor as claimed in claim 4 is characterized in that, described separator comprises and places in the cavity and moisture gelatin.
9, gas sensor as claimed in claim 1 is characterized in that, described steam is water vapour, methyl alcohol, ethanol or propyl alcohol steam, and described liquid corresponds to water or liquid methyl alcohol, ethanol or propyl alcohol.
10, gas sensor as claimed in claim 1, it is characterized in that, described sensor main body is embedded in the partial sidewall of cavity, described partial sidewall inside surface is provided with the endoporus that communicates with described steam through hole, have passage between the steam through hole of described sensor main body and the cavity, described separator is arranged in described passage two ends or the passage.
11, gas sensor as claimed in claim 1, it is characterized in that, described sensor main body comprises induction electrode, to electrode, exchange membrane between this two electrode, be arranged at two catalyst layers between two electrodes and the exchange membrane respectively, and be arranged at two carbon films between two electrodes and the exchange membrane respectively.
12, gas sensor as claimed in claim 11, it is characterized in that, described electrode structure is become the shell of sensor main body, described electrode is contained within induction electrode, exchange membrane, catalyst layer and carbon film in, described to electrode and described cavity mechanical engagement.
13, gas sensor as claimed in claim 11, it is characterized in that, the periphery of described two carbon films is respectively equipped with a support ring, and the support ring that is positioned at the periphery of two carbon films presses described exchange membrane therebetween, and described support ring, induction electrode, exchange membrane are pressed in the O-ring seal.
14, gas sensor as claimed in claim 11 is characterized in that, described carbon film is a carbon nano-tube film.
15, gas sensor as claimed in claim 1 is characterized in that, the gas of described sensor sensing is hydrogen, carbon monoxide, oxygen, formaldehyde, acetaldehyde, carbon dioxide, sulphuric dioxide or hydrogen sulfide gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101456887A CN101339152B (en) | 2008-03-12 | 2008-08-12 | Gas sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810019705.2 | 2008-03-12 | ||
| CNA2008100197052A CN101241100A (en) | 2008-03-12 | 2008-03-12 | Toxic combustible gas sensor capable of being generally used |
| CN2008101456887A CN101339152B (en) | 2008-03-12 | 2008-08-12 | Gas sensor |
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| Publication Number | Publication Date |
|---|---|
| CN101339152A true CN101339152A (en) | 2009-01-07 |
| CN101339152B CN101339152B (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100197052A Pending CN101241100A (en) | 2008-03-12 | 2008-03-12 | Toxic combustible gas sensor capable of being generally used |
| CN2008101456887A Expired - Fee Related CN101339152B (en) | 2008-03-12 | 2008-08-12 | Gas sensor |
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| CNA2008100197052A Pending CN101241100A (en) | 2008-03-12 | 2008-03-12 | Toxic combustible gas sensor capable of being generally used |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735723A (en) * | 2011-04-05 | 2012-10-17 | 费加罗技研株式会社 | Electromechanical gas sensor and riveting method thereof |
| CN103412011A (en) * | 2013-03-16 | 2013-11-27 | 上海理工大学 | Sulfur dioxide gas sensor and preparation method thereof |
| CN105348932A (en) * | 2015-12-11 | 2016-02-24 | 江苏国泰环境监测有限公司常熟分公司 | Free formaldehyde detecting device |
| CN105651835A (en) * | 2014-11-12 | 2016-06-08 | 长沙理工大学 | Methanol gas sensor and preparation method thereof |
| CN110749637A (en) * | 2019-09-23 | 2020-02-04 | 北京华科仪科技股份有限公司 | CO electrochemical gas sensor based on semi-solid electrolyte and preparation method thereof |
| CN111693515A (en) * | 2020-05-07 | 2020-09-22 | 四川轻化工大学 | Flow type electrochemical luminescence real-time detection device and detection method |
-
2008
- 2008-03-12 CN CNA2008100197052A patent/CN101241100A/en active Pending
- 2008-08-12 CN CN2008101456887A patent/CN101339152B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735723A (en) * | 2011-04-05 | 2012-10-17 | 费加罗技研株式会社 | Electromechanical gas sensor and riveting method thereof |
| CN102735723B (en) * | 2011-04-05 | 2015-12-02 | 费加罗技研株式会社 | Electrochemical gas sensor and clinching method thereof |
| CN103412011A (en) * | 2013-03-16 | 2013-11-27 | 上海理工大学 | Sulfur dioxide gas sensor and preparation method thereof |
| CN105651835A (en) * | 2014-11-12 | 2016-06-08 | 长沙理工大学 | Methanol gas sensor and preparation method thereof |
| CN105348932A (en) * | 2015-12-11 | 2016-02-24 | 江苏国泰环境监测有限公司常熟分公司 | Free formaldehyde detecting device |
| CN110749637A (en) * | 2019-09-23 | 2020-02-04 | 北京华科仪科技股份有限公司 | CO electrochemical gas sensor based on semi-solid electrolyte and preparation method thereof |
| CN111693515A (en) * | 2020-05-07 | 2020-09-22 | 四川轻化工大学 | Flow type electrochemical luminescence real-time detection device and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101241100A (en) | 2008-08-13 |
| CN101339152B (en) | 2012-01-25 |
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