CN102636542A - Gas sensor - Google Patents
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- CN102636542A CN102636542A CN2012100812819A CN201210081281A CN102636542A CN 102636542 A CN102636542 A CN 102636542A CN 2012100812819 A CN2012100812819 A CN 2012100812819A CN 201210081281 A CN201210081281 A CN 201210081281A CN 102636542 A CN102636542 A CN 102636542A
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Abstract
The invention provides a gas sensor, which comprises a shell, a measuring electrode, a support, a counter electrode, a plug and a shell cover. The top of the shell is opened, the bottom of the shell is provided with a flange, and perforative pores are arranged on the bottom wall of the shell in a region surrounded by the flange; the measuring electrode is disposed in the region surrounded by the flange, and external gas reaches the measuring electrode via the pores; the top and the bottom of the support are opened, the support hermetically matches with the flange, and the measuring electrode is fixedly clamped between the shell and the support; the counter electrode is disposed in the support, and a first liquid absorbing material layer is arranged between the counter electrode and the measuring electrode; the plug is provided with an air outlet hole, and the first liquid absorbing material layer and the counter electrode are fixedly clamped between the support and plug; and the shell cover is provided with an opening, the shell cover is detachably connected with the top of the shell, and the opening hermetically matches with the plug and is communicated with the air outlet hole. Miniaturization of the gas sensor is realized, and the gas sensor is compact in structure and fine in liquid leakage prevention property.
Description
Technical field
The present invention relates to a kind of gas sensor, relate in particular to a kind of electrochemical gas sensor of Miniaturizable.
Background technology
Electrochemical gas sensor is a kind of sensor that is widely used for monitoring gas at present.The patent No. is the oxygen sensor that the United States Patent (USP) of US4132616 has been described a routine galvanic cell type; This oxygen sensor at work; Oxygen is diffused into potential electrode through pore; Combine to take place reduction reaction with power and water at potential electrode place, form hydroxide ion, hydroxide ion arrives through electrolyte flow electrode and lead electrode reaction is formed massicot, power and water.In potential electrode and the size of the electric current that forms between to electrode be directly proportional with the percent concentration of oxygen.
Application number is to disclose a routine current mode oxygen sensor in the one Chinese patent application of CN200710038443.X.This sensor is when work, and oxygen is diffused into working electrode through pore and combines with hydrogen ion and electronics, reduction reaction takes place form hydrone, and hydrone is penetrated into its opposite side through solid electrolyte; On the other hand, to electrode, hydrone is by electrolysis; Form oxygen, hydrogen ion and electronics, in the oxygen of formation, hydrogen ion and the electronics, oxygen is discharged from venthole; Hydrogen ion is moved to working electrode through solid electrolyte, electronics then through external circuit from electrode is reached working electrode.Move to the hydrogen ion of working electrode and be used to compensate hydrogen ion and the electronics that aforementioned reduction reaction consumes, and form reduction current from electronics to electrode.The size of reduction current is directly proportional with the percent concentration of oxygen.This patent development the method for making electrode/interlayer/electrode assemblie, this method can be used for making gas oxygen sensor.
But the structure of above-mentioned gas sensor is often bigger, can't miniaturization.
Summary of the invention
The technical matters that the present invention will solve provides a kind of gas sensor, and the structure of this gas sensor is beneficial to miniaturization.
For solving the problems of the technologies described above, the invention provides a kind of gas sensor, comprising:
Housing, its open-top, bottom have flange, have the pore that runs through on the shell bottom wall in the said flange area surrounded;
Potential electrode is arranged in the said flange area surrounded, and extraneous gas arrives said potential electrode through said pore;
The support of top and bottom-open cooperates with said flange seal, and said potential electrode is clamped between said housing and the support;
Be arranged in the said support to electrode, said to being provided with the first imbibition material layer between electrode and the potential electrode;
Stopper with venthole, the said first imbibition material layer and electrode is clamped between said support and the stopper;
Be provided with the cap of opening, the top of said cap and said housing is for removably connecting, and is sealed and matched between said opening and the said stopper, and said opening communicates with said venthole.
Alternatively, be provided with first breathing waterproof film between the venthole of the opening of said cap and said stopper.
Alternatively, the bottom outer wall of said housing is provided with second breathing waterproof film, and extraneous gas gets into said kapillary through said second breathing waterproof film.
Alternatively, the said waterproof ventilated membrane outside also is provided with dustproof film, and extraneous gas gets into said kapillary through the said dustproof film and second breathing waterproof film successively.
Alternatively, said gas sensor also comprises:
Contrast electrode is positioned on the said first imbibition material layer;
The second imbibition material layer is positioned on the said contrast electrode layer, said electrode is positioned on the said second imbibition material layer.
Alternatively, be formed with via hole on the sidewall of said housing, lead passes said via hole and said potential electrode and electrode is linked to each other.
Alternatively, have a plurality of grooves on the sidewall of said support, have teat between the adjacent grooves.
Alternatively, under the said potential electrode, also be provided with the 3rd breathing waterproof film and catalyzer on the inwall of said housing bottom, extraneous gas arrives said potential electrode through said kapillary and the 3rd breathing waterproof film and via said catalyzer.
Alternatively, said support, housing and cap surround reservoir, are filled with electrolytic solution in the said reservoir.
Compared with prior art, the present invention has the following advantages:
In the gas sensor of the embodiment of the invention; Support cooperates with the flange seal of housing bottom, and potential electrode is clamped between housing and the support, and stopper and support are sealed and matched; To be clamped between support and the stopper electrode; This structure member is few, assembling is simple, fixes each mould layer and electrode with the mode that is sealed and matched, the processing step in the time of can reducing assembling.
Description of drawings
Fig. 1 is the sectional structure chart of the gas sensor of the embodiment of the invention;
Fig. 2 be potential electrode below in the gas sensor of the embodiment of the invention the 3rd breathing waterproof film and on the vertical view of catalyzer;
Fig. 3 is the assembly structure figure of gas sensor middle shell, support and the potential electrode of the embodiment of the invention;
Fig. 4 is the assembly structure figure of cap in the gas sensor of the embodiment of the invention, stopper and first breathing waterproof film;
Fig. 5 is the partial enlarged drawing of the gas sensor middle shell of the embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing the present invention is described further, but should limit protection scope of the present invention with this.
Fig. 1 shows the sectional structure chart of the gas sensor of present embodiment; This gas sensor mainly comprises: housing 122, cap 124, support 127, stopper 125, potential electrode 112, the first imbibition material layer 144a, to electrode 114 comprise the second imbibition material layer 144b, contrast electrode 116, the first breathing waterproof film 142a, the second breathing waterproof film 142b, dustproof film 126, the 3rd breathing waterproof film 142c in addition.
Wherein, the material of housing 122, cap 124, support 127 and stopper 125 can be plastics.The profile of housing 122 is cylindrical or is similar to cylindrically that the gas sensor of present embodiment external diameter after assembling is accomplished is about 10mm, highly is about 6mm.
The open-top of housing 122, the bottom has flange, and also has the pore 128 that runs through on this flange institute area surrounded inner housing diapire; Potential electrode 112 is arranged in the flange area surrounded, and extraneous gas can arrive potential electrode 112 through kapillary 128.
In the present embodiment, housing 122 bottom outer wall are provided with the second breathing waterproof film 142b, and the arranged outside of the second breathing waterproof film 142b has dustproof film 126; In addition, combine Fig. 2 simultaneously, also be provided with the 3rd breathing waterproof film 142c on the bottom interior wall of housing 122, have catalyzer 118 on the 3rd breathing waterproof film 142c, potential electrode 112 loads on the 3rd breathing waterproof film 142c.
Extraneous gas arrives potential electrode 112 through dustproof film 126, the second breathing waterproof film 142b, kapillary 128, the 3rd breathing waterproof film 142c and catalyzer 118 successively.Wherein, the 3rd breathing waterproof film 142c plays the effect of sealing on the one hand, prevents that the inner electrolytic solution of gas sensor from leaking in the pore 128, makes gas can diffuse to potential electrode 112 on the other hand.The anti-on the one hand sealing of the second waterproof ventilated membrane 142b or other materials get into pore 128 and with pore 128 obstructions, can make extraneous gas to get in the pore 128 through the second waterproof ventilated membrane 142b on the other hand from external environment condition.Dustproof film 126 is positioned on the lateral wall of the second breathing waterproof film 142b, is used to prevent that dust and other particulate pollutants from getting into gas sensor, and protection working electrode 112 is not contaminated.
Wherein, dustproof film 126 can adopt materials such as polypropylene or polyester to process, and the second breathing waterproof film 142b and the 3rd breathing waterproof film 142c can adopt Teflon or other suitable materials to process.
The top of support 127 and bottom-open cooperate with the flange seal of housing 122 bottoms, and potential electrode 112 is clamped between housing 122 and the support 127.Combine Fig. 3 simultaneously, support 127 cooperates with the flange seal of housing 122 bottoms, and potential electrode 112 is clamped in the flange area surrounded.Support 127 is fixing with potential electrode 112 on the one hand; Adopt friction tight mode to play sealing function on the other hand; Make electrolytic solution can not infiltrate in the kapillary 128 and kapillary 128 is stopped up; Can potential electrode 112 and reservoir 150 be isolated in addition, thereby prevent the gas that electrode 114 produces is arrived potential electrode and makes distorted signals.
Still with reference to figure 3, have a plurality of grooves on the sidewall of present embodiment medium-height trestle 127, have teat between the adjacent grooves.Wherein, Groove can be convenient to the lead cabling, the lead that links to each other with the different electrodes of gas sensor can be in different recesses cabling, reduce the short-circuit risks between the lead; Be convenient to the imbibition material layer depth in addition and go into reservoir 150 all around, the electrolyte content of balance reservoir 150 and center section.Teat can play the effect of location, is convenient to install imbibition material layer, contrast electrode 116, to parts such as electrodes 114.
The first imbibition material layer 144a, contrast electrode 116, the second imbibition material layer 144b and electrode 114 is successively set in the support 127; Afterwards stopper 125 is filled in from support 127 tops uncovered, be clamped between support 127 and the stopper 125 with the first imbibition material layer 144a, contrast electrode 116, the second imbibition material layer 144b with to electrode 114.The first imbibition material layer 144a and the second imbibition material layer 144b can be glass microfiber paper, and stopper 125 has venthole 154.
In conjunction with Fig. 1 and Fig. 4, for removably connecting, cap 124 has opening between the top of cap 124 and housing 122, and this is opened on stopper 125 and is sealed and matched.Behind mount, the opening of cap 124 communicates with the venthole 154 of stopper 125.Support 127, housing 122 and cap 124 surround reservoir 150 jointly, wherein can be filled with electrolytic solution.
In addition, be provided with the first breathing waterproof film 142a between the opening of cap 124 and the venthole 154, the first breathing waterproof film 142a is gripped by cap 124, stopper 125 and support 127 jointly.The first breathing waterproof film 142a can prevent that moisture from getting into venthole 154.The material of the first breathing waterproof film 142a also can be processed by materials such as Teflon.The first breathing waterproof film 142a can prevent that electrolytic solution is leaked in the venthole 154 on the one hand; Play sealing function; The part of the first breathing waterproof film 142a stretches in the reservoir 150 on the other hand; Can make gas sensor inside and outside pressure and environment reach balance rapidly, thereby can not influence the response performance of gas sensor.
Adopt stopper 125 that the first breathing waterproof film 142a is fixed on the cap 124; Assembling is simple; Use friction tight mode to realize fixing to the first breathing waterproof film 142a; With traditional O-ring seal, the sealing means of waterproof ventilated membrane hot melt on working of plastics compared, the fixed form of present embodiment helps simplifying assembly technology.
Fig. 5 shows the partial enlarged drawing of the housing 122 of present embodiment, with reference to figure 5, has via hole 130 on the sidewall of housing 122, and lead 132 passes each electrode in this via hole and the gas sensor (potential electrode, contrast electrode with to electrode) and links to each other.Adopt the mode that forms via hole 130 on the sidewall can improve the reliability of control leakage,, be convenient to seal through the size of control via hole 130; And with prior art in conventional lead 132 detour from shell wall and get into the inner mode of gas sensor and compare, the cable run distance of lead 132 is less because lead 132 adopts noble metals such as platinum filaments usually, reducing cable run distance can reduce cost.
As a nonrestrictive example, the gas sensor in the present embodiment is an oxygen sensor.Still with reference to figure 1, oxygen diffuses to potential electrode 112 through pore 128, and at potential electrode 112 places, oxygen is caught from the electronics to electrode 114, and and hydrogen ions, reduction reaction takes place generate hydrone, reduction reaction is as follows:
O
2+4H
++4e
-→2H
2O (1)
On the other hand, to electrode 114 places, hydrone is decomposed, and produces hydrogen ion and electronics, and electrolytic process is as follows:
2H
2O→4H
++O
2+4e
- (2)
Can potential electrode 112 be set to negative electrode, will be set to anode, can be spread to potential electrode 112 through the imbibition material layer at the hydrogen ion that electrode 114 places are produced to electrode 114.Then can arrive potential electrode 112 at the electronics that electrode 114 places are produced through external circuit.In an instantiation; Between potential electrode 112 and contrast electrode 116, apply-negative bias of 0.6V through potentiostatic circuit; For potential electrode 112 provides negative potential; Promptly apply a polarized potential that is positioned at limit of diffusion district, and this current potential is lower than hydrogen-evolution overpotential through 116 pairs of potential electrode 112 of contrast electrode.Under this current potential, potential electrode 112 takes place to form reduction current simultaneously suc as formula the reduction reaction shown in (1), because reduction current depends on the wear rate of oxygen, thereby can confirm the oxygen concentration at potential electrode 112 places through the size of measuring reduction current.
In addition, the oxygen that electrode 114 places is produced is diffused into the gas sensor outside through venthole 154.Because reaction equation (1) and (2) are balances; Thereby the reaction in the oxygen sensor is the water that the water to electrode 114 places is converted into potential electrode 112 places; Convert the oxygen at potential electrode 112 places into oxygen, thereby this oxygen sensor also can be called " oxygen pump " to electrode 114 places.In addition, electronics is discharging electrode 114 places, and 112 places catch in potential electrode, and hydrogen ion is from moving to potential electrode 112 to electrode 114 through the imbibition material layer, and the imbibition material layer can stop oxygen diffusion to the potential electrode 112 to electrode 114 places again.
Need to prove,, it will be appreciated by those skilled in the art that the gas sensor configuration of present embodiment can also be applicable to other gas sensors though be to be that example describes with the oxygen sensor.
To sum up; The structure of present embodiment gas sensor is of value to miniaturization; Life-span length, compact conformation, leakproof fluidity are good; The wide humidity that can conform changes, and can set up effective pressure equilibrium with environment rapidly, prevents that pressure from changing the destruction of gas sensor so that the signal that influences gas sensor are exported.
Though the present invention with preferred embodiment openly as above; But it is not to be used for limiting the present invention; Any those skilled in the art are not breaking away from the spirit and scope of the present invention; Can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (9)
1. a gas sensor is characterized in that, comprising:
Housing, its open-top, bottom have flange, have the pore that runs through on the shell bottom wall in the said flange area surrounded;
Potential electrode is arranged in the said flange area surrounded, and extraneous gas arrives said potential electrode through said pore;
The support of top and bottom-open cooperates with said flange seal, and said potential electrode is clamped between said housing and the support;
Be arranged in the said support to electrode, said to being provided with the first imbibition material layer between electrode and the potential electrode;
Stopper with venthole, the said first imbibition material layer and electrode is clamped between said support and the stopper;
Be provided with the cap of opening, the top of said cap and said housing is for removably connecting, and is sealed and matched between said opening and the said stopper, and said opening communicates with said venthole.
2. gas sensor according to claim 1 is characterized in that, is provided with first breathing waterproof film between the opening of said cap and the venthole of said stopper.
3. gas sensor according to claim 1 is characterized in that the bottom outer wall of said housing is provided with second breathing waterproof film, and extraneous gas gets into said kapillary through said second breathing waterproof film.
4. gas sensor according to claim 3 is characterized in that, the said waterproof ventilated membrane outside also is provided with dustproof film, and extraneous gas gets into said kapillary through the said dustproof film and second breathing waterproof film successively.
5. gas sensor according to claim 1 is characterized in that, also comprises:
Contrast electrode is positioned on the said first imbibition material layer;
The second imbibition material layer is positioned on the said contrast electrode layer, said electrode is positioned on the said second imbibition material layer.
6. gas sensor according to claim 1 is characterized in that, is formed with via hole on the sidewall of said housing, and lead passes said via hole and said potential electrode and electrode is linked to each other.
7. gas sensor according to claim 1 is characterized in that, has a plurality of grooves on the sidewall of said support, has teat between the adjacent grooves.
8. gas sensor according to claim 1; It is characterized in that; Under the said potential electrode, also be provided with the 3rd breathing waterproof film and catalyzer on the inwall of said housing bottom, extraneous gas arrives said potential electrode through said kapillary and the 3rd breathing waterproof film and via said catalyzer.
9. gas sensor according to claim 1 is characterized in that said support, housing and cap surround reservoir, is filled with electrolytic solution in the said reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210081281.9A CN102636542B (en) | 2012-03-23 | 2012-03-23 | Gas sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210081281.9A CN102636542B (en) | 2012-03-23 | 2012-03-23 | Gas sensor |
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| CN102636542B CN102636542B (en) | 2014-02-26 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267146A (en) * | 2014-08-28 | 2015-01-07 | 西红柿科技（武汉）有限公司 | Gas monitoring instrument and system |
| CN104698127A (en) * | 2013-12-09 | 2015-06-10 | 瑞士西门子有限公司 | Smoke detection unit containing redundant detectors |
| CN105980843A (en) * | 2014-02-12 | 2016-09-28 | 霍尼韦尔国际公司 | Gas sensors with structure to resist signal losses due to condensation |
| WO2017128280A1 (en) * | 2016-01-29 | 2017-08-03 | Honeywell International Inc. | Method for decreasing baseline under high temperature of gas sensor |
| CN107727707A (en) * | 2017-10-19 | 2018-02-23 | 广东美的制冷设备有限公司 | Gas sensor and its preparation technology and airhandling equipment |
| CN108027337A (en) * | 2015-07-22 | 2018-05-11 | 霍尼韦尔国际公司 | Wetting and the separation of contact area section extrude |
| CN108333235A (en) * | 2018-04-24 | 2018-07-27 | 郑州迪邦科技有限公司 | Gas analyzer shell and the gas analyzer for using the shell |
| CN109789366A (en) * | 2016-10-05 | 2019-05-21 | 霍尼韦尔国际公司 | Dust-proof and splashproof filter |
| CN111366682A (en) * | 2020-03-10 | 2020-07-03 | 广东小天才科技有限公司 | Calibration method and device of gas sensor, electronic equipment and storage medium |
| CN113295755A (en) * | 2021-05-18 | 2021-08-24 | 中国科学院合肥物质科学研究院 | Sampling type rapid primary battery oxygen sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357585A (en) * | 2001-06-01 | 2002-12-13 | Shimadzu Corp | Gas sensor |
| CN101275923A (en) * | 2007-03-26 | 2008-10-01 | 华瑞科学仪器(上海)有限公司 | Gas sensor |
| CN102109483A (en) * | 2009-12-25 | 2011-06-29 | 郑州炜盛电子科技有限公司 | Electrochemical gas sensor |
-
2012
- 2012-03-23 CN CN201210081281.9A patent/CN102636542B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357585A (en) * | 2001-06-01 | 2002-12-13 | Shimadzu Corp | Gas sensor |
| CN101275923A (en) * | 2007-03-26 | 2008-10-01 | 华瑞科学仪器(上海)有限公司 | Gas sensor |
| CN102109483A (en) * | 2009-12-25 | 2011-06-29 | 郑州炜盛电子科技有限公司 | Electrochemical gas sensor |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698127A (en) * | 2013-12-09 | 2015-06-10 | 瑞士西门子有限公司 | Smoke detection unit containing redundant detectors |
| CN105980843B (en) * | 2014-02-12 | 2019-01-01 | 霍尼韦尔国际公司 | The gas sensor of the structure of the loss of signal caused by with resisting because of condensation |
| US10955377B2 (en) | 2014-02-12 | 2021-03-23 | Life Safety Distribution Ag | Gas sensors with structure to resist signal losses due to condensation |
| CN105980843A (en) * | 2014-02-12 | 2016-09-28 | 霍尼韦尔国际公司 | Gas sensors with structure to resist signal losses due to condensation |
| CN104267146B (en) * | 2014-08-28 | 2016-03-02 | 西红柿科技（武汉）有限公司 | A kind of gas monitoring instrument and system |
| CN104267146A (en) * | 2014-08-28 | 2015-01-07 | 西红柿科技（武汉）有限公司 | Gas monitoring instrument and system |
| CN108027337A (en) * | 2015-07-22 | 2018-05-11 | 霍尼韦尔国际公司 | Wetting and the separation of contact area section extrude |
| WO2017128280A1 (en) * | 2016-01-29 | 2017-08-03 | Honeywell International Inc. | Method for decreasing baseline under high temperature of gas sensor |
| US11187670B2 (en) | 2016-01-29 | 2021-11-30 | Honeywell International Inc. | Method for decreasing baseline under high temperature of gas sensor |
| CN109073586A (en) * | 2016-01-29 | 2018-12-21 | 霍尼韦尔国际公司 | For reducing the method for the baseline at high temperature of gas sensor |
| CN109789366A (en) * | 2016-10-05 | 2019-05-21 | 霍尼韦尔国际公司 | Dust-proof and splashproof filter |
| CN107727707A (en) * | 2017-10-19 | 2018-02-23 | 广东美的制冷设备有限公司 | Gas sensor and its preparation technology and airhandling equipment |
| CN108333235A (en) * | 2018-04-24 | 2018-07-27 | 郑州迪邦科技有限公司 | Gas analyzer shell and the gas analyzer for using the shell |
| CN111366682A (en) * | 2020-03-10 | 2020-07-03 | 广东小天才科技有限公司 | Calibration method and device of gas sensor, electronic equipment and storage medium |
| CN113295755A (en) * | 2021-05-18 | 2021-08-24 | 中国科学院合肥物质科学研究院 | Sampling type rapid primary battery oxygen sensor |
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| CN102636542B (en) | 2014-02-26 |
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