CN101435789B - Electrochemical diffusion type gas sensor - Google Patents
Electrochemical diffusion type gas sensor Download PDFInfo
- Publication number
- CN101435789B CN101435789B CN2008100516560A CN200810051656A CN101435789B CN 101435789 B CN101435789 B CN 101435789B CN 2008100516560 A CN2008100516560 A CN 2008100516560A CN 200810051656 A CN200810051656 A CN 200810051656A CN 101435789 B CN101435789 B CN 101435789B
- Authority
- CN
- China
- Prior art keywords
- electrode
- sensor
- runddichtringo
- lower house
- upper shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000009792 diffusion process Methods 0.000 title claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 7
- 210000004907 gland Anatomy 0.000 claims abstract description 6
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 6
- 230000035807 sensation Effects 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Abstract
The invention belongs to design of an electrochemical diffused gas sensor. Firstly, three binding posts pass through a lower shell, then three platinum conducting wires pass through a spot welder and are welded on the three binding post, a waterproof membrane covers on the three binding posts, an O-shaped sealing rings covers on the waterproof film, and a hygroscopic material covers on the O-shaped sealing ring; secondly, the conducting wires pass through straight ports through electrode leaders on the inner wall of the lower shell and are linked to an upper shell, the two shells are connected through a thermosonic bonder; and finally a working electrode, a counter electrode, and a reference electrode are sequentially superposed together to form a combined electrode, a gland bush is arranged and is sealed through the thermosonic bonder, and then a dustproof gas barrier film seal cap is added to finish the assembly. The design solves the technical roughness of appearance of the sensor, and improves the response time of the sensor and the measurement accuracy of the sensor at the same time.
Description
Technical field
The invention belongs to the design of electrochemical diffusion type gas sensor.
Background technology
Its three electrodes of Britain city company sensor designed are to rely on O type circle, and waterproofing membrane through high-pressure extrusion, adds the fluid sealant encapsulation, and this design sealing effectiveness is poor, and outward appearance technology is coarse, uses easy-to-leak liquid for a long time.Chinese patent discloses a kind of " solid polymer electrolyte carbon monoxide transducer (01252229.5) ", and it mainly is made up of sensor chip, ventilative dividing plate, spilehole, appearance air chamber, sensor outer housing; Wherein sensor chip is as electrolyte with solid polymer; With noble metal powder with the bonding waterproof catalyst film of bonding agent as working electrode, auxiliary electrode, contrast electrode, solid polymer dielectric film and electrode are through the sinter integrator.These Design of Sensor all adopt two electrodes and three electrode design, can only measure single gas.
Summary of the invention
The objective of the invention is to design a kind of electrochemical diffusion type gas sensor.
The present invention adopts wide band in order to solve sensor leakage problem, it is contacted closely, the leaded groove of lead with electrode; Gland has the envelope shelves, and upper shell has straight mouthful, and thermosonic bonding is adopted in assembling between housing; Through spot welder pressurization moment contact welding, to abandon and rely on the fluid sealant encapsulation in the past, lead is connected with binding post; It is coarse to have solved sensor outward appearance technology, thereby improves the sensor's response time, improves the measuring accuracy of sensor.
The present invention at first scurried three binding posts in lower house, again three platinum leads was passed through spot welder, was welded on three binding posts, covered waterproof membrane above; Cover the O RunddichtringO on the waterproof membrane, hygroscopic material on the O RunddichtringO, again with the contact conductor of lead through the lower house inwall through straight mouthful, be linked to upper shell; Through thermosonic bonder, two housings is connected, afterwards, successively with working electrode; To electrode, the reference electrode combination electrode superposes together, adds upper press cover; Through thermosonic bonder, gland is sealed up, add dustproof choke film seal cap again.Accomplish assembling.Wherein: 1 is three binding posts, and 2 is the cylindrical shape lower house, and the lower house inwall has three electrical leads passages; Have protruding shelves to encircle in the bottom, act as fixedly O RunddichtringO 4, the envelope shelves of a convexity are arranged at housing top; It act as fixedly upper shell, and 3 is the waterproof polytetrafluoroethylene membrane, and 4 is the O RunddichtringO; 5 is hygroscopic material, and its effect is an Electolyte-absorptive, and 6 have circular hole cylinder type upper shell for the center.A bleeder vent is arranged in the upper shell center of circle, have four straight mouthful on it, three is through lead-in wire, an envelope shelves socket, and 7 is combination electrode, is respectively reference electrode, to electrode, working electrode, is added with hygroscopic material between each electrode respectively.8 is gland, and there is six roots of sensation spoke at the center, and its effect is the combination electrode in the locking upper shell; Six air holes, its effect are to gather detected gas, and the effect of circular envelope shelves is the locking combination electrode; Straight mouthful of effect of three convexities is the locking guidewire port, and 9 is the circular closure of the porose and six roots of sensation spoke in center.
The electrochemical diffusion type gas sensor good sealing effect of the present invention's design does not have the electrolytic solution of flowing, long service life, and the sensitivity of sensor is higher.
Description of drawings
Accompanying drawing 1 is the electrochemical diffusion type gas sensor synoptic diagram
Embodiment
Embodiment of the present invention accompanying drawings is following:
Three binding posts 1 link through spot welder with three platinum leads respectively, and cylindrical shape lower house 2 inwalls have three electrical leads passages, have a protruding shelves ring to be used for fixing O RunddichtringO 4 in the bottom; O RunddichtringO 4 is fixed on waterproof polytetrafluoroethylene membrane 3 in the lower house, and bedding hygroscopic materials 5 above the O RunddichtringO 4, hygroscopic material 5 coincide round-meshed cylinder type upper shell 6 lids in center are tight, and three leads contact conductor through the lower house inwall is through straight mouthful; Be linked to upper shell,, two housings connected, again three leads are pressed working electrode respectively through thermosonic bonder; To electrode, reference electrode forms the combination electrode 7 that is sandwich-like up and down; Afterwards, add upper press cover 8, through thermosonic bonder; Gland is sealed up, added the circular closure 9 of the porose and six roots of sensation spoke in center again, accomplish assembling.
Claims (1)
1. electrochemical diffusion type gas sensor, three binding posts 1 link through electric welding machine with three platinum leads respectively, and cylindrical shape lower house 2 inwalls have three electrical leads passages; Have a protruding shelves ring to be used for fixing O RunddichtringO 4 in the bottom, O RunddichtringO 4 is fixed on waterproof polytetrafluoroethylene membrane 3 in the lower house, bedding hygroscopic material 5 above the O RunddichtringO 4; The round-meshed drum type upper shell 6 in center is tight at hygroscopic material 5 loam cakes, and three platinum leads contact conductor through the lower house inwall is linked to upper shell through straight mouthful; Through thermosonic bonder, two housings is connected, again three platinum leads are pressed working electrode respectively; To electrode, reference electrode forms the combination electrode 7 that is sandwich-like up and down; Afterwards, add upper press cover 8, through excusing from death ripple Hot welding; Gland is sealed up, added the circular closure 9 of the porose and six roots of sensation spoke in center again, accomplish assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100516560A CN101435789B (en) | 2008-12-23 | 2008-12-23 | Electrochemical diffusion type gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100516560A CN101435789B (en) | 2008-12-23 | 2008-12-23 | Electrochemical diffusion type gas sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101435789A CN101435789A (en) | 2009-05-20 |
| CN101435789B true CN101435789B (en) | 2012-01-25 |
Family
ID=40710337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100516560A Expired - Fee Related CN101435789B (en) | 2008-12-23 | 2008-12-23 | Electrochemical diffusion type gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101435789B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0797770A1 (en) * | 1994-12-16 | 1997-10-01 | Heraeus Electro-Nite International N.V. | Method of measuring the concentration of a gas in a gas mixture and electrochemical sensor for determining the gas concentration |
| CN2273861Y (en) * | 1996-01-26 | 1998-02-04 | 中国科学院长春应用化学研究所 | Electrochemical diffusion type gaseous sensor |
| CN2273860Y (en) * | 1996-01-26 | 1998-02-04 | 中国科学院长春应用化学研究所 | Electrochemical strong adsorption type gaseous sensor |
| CN2886564Y (en) * | 2005-12-30 | 2007-04-04 | 中国科学院长春应用化学研究所 | Electrochemical diffusion type gas sensor |
| CN2886565Y (en) * | 2005-12-30 | 2007-04-04 | 中国科学院长春应用化学研究所 | Electrochemical poison gas sensor |
| EP1873517A1 (en) * | 2006-06-27 | 2008-01-02 | Fujikura Ltd. | Limiting current type oxygen sensor and method of sensing and measuring oxygen concentrations using the same |
-
2008
- 2008-12-23 CN CN2008100516560A patent/CN101435789B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0797770A1 (en) * | 1994-12-16 | 1997-10-01 | Heraeus Electro-Nite International N.V. | Method of measuring the concentration of a gas in a gas mixture and electrochemical sensor for determining the gas concentration |
| CN2273861Y (en) * | 1996-01-26 | 1998-02-04 | 中国科学院长春应用化学研究所 | Electrochemical diffusion type gaseous sensor |
| CN2273860Y (en) * | 1996-01-26 | 1998-02-04 | 中国科学院长春应用化学研究所 | Electrochemical strong adsorption type gaseous sensor |
| CN2886564Y (en) * | 2005-12-30 | 2007-04-04 | 中国科学院长春应用化学研究所 | Electrochemical diffusion type gas sensor |
| CN2886565Y (en) * | 2005-12-30 | 2007-04-04 | 中国科学院长春应用化学研究所 | Electrochemical poison gas sensor |
| EP1873517A1 (en) * | 2006-06-27 | 2008-01-02 | Fujikura Ltd. | Limiting current type oxygen sensor and method of sensing and measuring oxygen concentrations using the same |
Non-Patent Citations (1)
| Title |
|---|
| 董峰等.控制电位电解法NO气体传感器.《云南大学学报》.1997,第19卷(第1期),10－13. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101435789A (en) | 2009-05-20 |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20190510 Address after: 130015 No. 5218 Longhu Road, High-tech North District, Changchun City, Jilin Province Patentee after: Changchun applied chemical science and Technology General Corporation of Chinese Academy of Sciences Address before: 130022 No. 5625 Renmin Street, Jilin, Changchun Patentee before: CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY CHINESE ACADEMY OF SCIENCES |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190628 Address after: 132000 Jilin Province Longtan District Tiedong District Longdong District 5 Units 91 Patentee after: Jilin Xinhua Investment Co.,Ltd. Address before: 130015 No. 5218 Longhu Road, High-tech North District, Changchun City, Jilin Province Patentee before: Changchun applied chemical science and Technology General Corporation of Chinese Academy of Sciences |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190725 Address after: 130012 No. 329 Xi'an Road, Chuanying District, Jilin Province Patentee after: Jilin Boyuxiangshi Industry and Trade Co.,Ltd. Address before: 132000 Jilin Province Longtan District Tiedong District Longdong District 5 Units 91 Patentee before: Jilin Xinhua Investment Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 |