CN201628699U - Flat-plate oxygen sensor - Google Patents
Flat-plate oxygen sensor Download PDFInfo
- Publication number
- CN201628699U CN201628699U CN2010201444115U CN201020144411U CN201628699U CN 201628699 U CN201628699 U CN 201628699U CN 2010201444115 U CN2010201444115 U CN 2010201444115U CN 201020144411 U CN201020144411 U CN 201020144411U CN 201628699 U CN201628699 U CN 201628699U
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- air chamber
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- heating
- sensitive element
- air
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000001301 oxygen Substances 0.000 title claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000010345 tape casting Methods 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 16
- 229910000510 noble metal Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 239000010970 precious metal Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The utility model relates to a flat-plate oxygen sensor, which comprises a sensitive component layer, an air-chamber layer, an insulating layer and a heating layer that are sequentially sintered together from top to bottom. The characteristics are as follows: the sensitive component layer comprises the sensitive component main body, an external electrode and an internal electrode which are arranged at surfaces at both sides of the sensitive component main body; the external electrode and the internal electrode are all of precious metal electrodes; the air-chamber layer comprises the air-chamber main body and an air chamber, and the air chamber presents T-shaped structure and is formed inside the air-chamber main body; the external dimension of the air-chamber main body is identical to that of the sensitive component main body, meanwhile, the shape and the area of the internal air chamber correspond to that of the internal electrode, and the internal air chamber is made of Zirconia through a tape casting method; the heating layer comprises a heating body, and a micro heating circuit arranged on the surface of the heating body. The sensitive component layer, the air-chamber layer, the insulating layer and the heating layer have the same thickness of 1mm to 1.2 mm; the insulating layer is made of insulating aluminium oxide to avoid affect of heating current on measuring current; the sensor has small volume and is provided with the heating body, therefore, the heating speed is fast, and the response speed is high.
Description
Technical field
The utility model relates to a kind of lambda sensor, particularly is a kind of plate type oxygen sensor that is used for Control of Automobile engine air and fuel ratio, belongs to the lambda sensor technical field.
Background technology
The emission detections system that the Hyundai Motor engine is adopted, its method of work is: the oxygen concentration behind the detection of engine combusted cylinder in the exhaust gas discharged, the oxygen concentration that generates down with the ideal burning state compares, by the air and the combustion gas ratio of FEEDBACK CONTROL supply engine, realize controlling the purpose of tail gas nuisance quality.Wherein play the element of detection effect, the main at present solid electrolyte lambda sensor that adopts is generally the pipe that one one end seals, and its main material is the solid electrolytic zirconia, plays the sensitive element effect; And prepare respectively the sealing pipe surfaces externally and internally on two noble metal electrodes, the electrode that wherein is exposed to outside surface contacts with motor exhaust, the electrode that is sealed in inside surface contacts with reference gas such as air.
Solid electrolyte type lambda sensor operate as normal requires to be heated to about 700 degree celsius temperature, just has responsive active.To fulfill this requirement, usually the heater air flow pressure switch rod for preparing with aluminium oxide is used, and the heating by a period of time reaches working temperature.But along with the enforcement of strict environmental regulation day by day at present, require to start working in the shorter time at lambda sensor, the drum type brake lambda sensor of traditional tyre heater air flow pressure switch rod is owing to need long heat time heating time, thereby can not satisfy new emission regulation demands.
A kind of novel flat lambda sensor has been proposed for this reason in recent years, this kind lambda sensor is made up of three layers of tabular zirconia plate of flat planar, its outer surface one deck is a sensitive element, noble metal electrode is prepared in respectively on two planes of sensitive element, two-layer zirconia ceramics inside comprises miniature heater circuit in addition, plays the calandria function; At last three layers of zirconia plate are sintered to one, have so just realized carrying the lambda sensor structure of heating function, the time that reaches working temperature shortens greatly.
But the plate type oxygen sensor calandria structure of using generally adopts zirconia material at present, under working temperature, can conduct electricity, causing the heater circuit impressed current to measure electric current to sensitive element exerts an influence, must prepare insulation course in inside prevents, this insulation course generally adopts the thick film screen printing technique to be molded on the calandria structure, and its insulation effect is general, complex structure, technology difficulty is big, the cost height.
Summary of the invention
The purpose of this invention is to provide a kind of independent alumina insulating layer structure, technology is greatly simplified, and can realize the plate type oxygen sensor of inner superior isolation effect.
The utility model is to realize the foregoing invention purpose like this:
The utility model plate type oxygen sensor is that sensitive element layer, air chamber layer, insulation course and zone of heating sintering form together from top to bottom successively.
Described sensitive element layer is by the sensitive element body, and the interior electrode composition that is arranged on the external electrode of its outer surface and the side surface that sets within it; External electrode and interior electrode all adopt noble metal electrode, as platinum electrode;
Described sensitive element body is a rectangular parallelepiped thin plate, and its length is 50mm-60mm; Its width is 5mm-6mm; Its thickness is slightly larger than 1mm (desirable 1mm-1.2mm); Adopt zirconia material to make by The tape casting.
The thickness basically identical of described sensitive element layer, air chamber layer, insulation course and zone of heating;
Described air chamber layer is made up of air chamber body and air chamber, and air chamber is the inside that T shape structure is formed at the air chamber body; The physical dimension of air chamber body is consistent with the sensitive element body, and the inner plenum shape area is corresponding with interior electrode, adopts zirconia material to be made by The tape casting.
Air chamber is T shape structure and is of a size of: head length is square, and it is long to be 5mm-8mm; Wide is 3mm-4mm; The afterbody rectangle, it is long to be 35mm-40mm, wide is 0.8mm-1.5mm
Described insulation course is the physical dimension thin plate identical with the sensitive element body, adopts alumina material to be made by The tape casting.
Described zone of heating is made up of calandria and the miniature heater circuit that is arranged on its surface; Calandria is the physical dimension thin plate identical with the sensitive element body, adopts alumina material to be made by The tape casting.Miniature heater circuit is between insulation course and calandria, and the connection external circuit that passes through to go between.
Advantage of the present utility model and effect are: owing to introduce the insulation layer structure of the alumina material preparation of one deck insulation, and adopt alumina material to prepare zone of heating, finally, greatly simplified insulating process by four layers of ceramic layer of sinter bonded, and preparation is simple, guarantees good serviceability simultaneously.
Description of drawings
Fig. 1 is each layer of the utility model plate type oxygen sensor structural representation;
Fig. 2 is the utility model plate type oxygen sensor air chamber layer structural representation;
Fig. 3 is that the utility model plate type oxygen sensor is connected the general structure synoptic diagram with peripheral component.
Embodiment
Below by an embodiment technical solutions of the utility model are described further:
As shown in Figure 1, plate type oxygen sensor is that sensitive element layer 1, air chamber layer 2, insulation course 3 and zone of heating 4 sintering form together from top to bottom successively.
Described sensitive element layer 1 is by sensitive element body 11, and interior electrode 13 compositions that are arranged on the external electrode 12 of its outer surface and the side surface that sets within it; External electrode 12 and interior electrode 13 all adopt platinum electrode;
Described sensitive element body 11 is a rectangular parallelepiped thin plate, and its length is 50mm; Its width is 5mm; Its thickness is 1mm; Adopt zirconia material to make by The tape casting.
The consistency of thickness of described sensitive element layer 1, air chamber layer 2, insulation course 3 and zone of heating 4;
Described air chamber layer 2 is made up of air chamber body 21 and air chamber 22, and air chamber 22 is the inside that T shape structure is formed at air chamber body 21; The physical dimension of air chamber body is consistent with the sensitive element body, and inner plenum 22 shape area are corresponding with interior electrode 13, adopts zirconia material to be made by The tape casting.
Air chamber is T shape structure and is of a size of: head length is square 221, and it is long to be 5mm; Wide is 3mm; Afterbody rectangle 222, it is long to be 35mm, wide is 0.8mm
Described insulation course 3 thin plate identical with sensitive element body 11 that be a physical dimension adopts alumina material to be made by The tape casting.In the actual process, air chamber body 21 also is to make thin plate as insulation course 3 so earlier, stamps out an air chamber 22 that is T shape structure again
Described zone of heating 4 is made up of calandria 41 and the miniature heater circuit 42 that is arranged on its surface; Calandria 41 thin plate identical with sensitive element body 11 that be a physical dimension adopts alumina material to be made by The tape casting.Miniature heater circuit 42 is between insulation course 3 and calandria 41, and the connection external circuit that passes through to go between.
Plate type oxygen sensor is added corresponding peripheral components, link together, make and (to be called sensor body at Fig. 3 middle plateform formula lambda sensor, to adopt when only doing whole the signal) as shown in Figure 3 at the direct applied finished product of reality according to classic method; Metal protection protector 71 is used for protecting sensor body 75 not to be subjected to the waste gas impurity damage; Fluid sealant 72 is used for fixing sensor; Metal fabricated section 73 is used for the whole finished product that encapsulation finishes is mounted to engine; Pottery protective sleeve 74 is used for protection and fixation of sensor body 75; Web member 76 is used to connect outside lead, will measure electric current and derive; Draw lead 77 and be used to connect sensor and control chip.
The inside and outside size of described each layer of plate type oxygen sensor can change according to actual needs within the specific limits, below provides an embodiment again;
This embodiment only provides another group specification, and it is consistent with the foregoing description that it forms structure:
Described sensitive element body 11 is a rectangular parallelepiped thin plate, and its length is 60mm; Its width is 6mm; Its thickness is 1.2mm; Adopt zirconia material to make by The tape casting.
The consistency of thickness of described sensitive element layer, air chamber layer, insulation course and zone of heating;
Described air chamber is T shape structure and is of a size of: head length is square 221, and it is long to be 8mm; Wide is 4mm; Afterbody rectangle 222, it is long to be 40mm, wide is 1.5mm
Described insulation course is the physical dimension thin plate identical with the sensitive element body, adopts alumina material to be made by The tape casting.
In sum, more than be preferred embodiment of the present utility model only, be not to be used to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. plate type oxygen sensor, be that sensitive element layer, air chamber layer, insulation course and zone of heating sintering form together from top to bottom successively, described sensitive element layer is by the sensitive element body, and the interior electrode composition that is arranged on the external electrode of its outer surface and the side surface that sets within it; External electrode and interior electrode all adopt noble metal electrode; Described zone of heating is made up of calandria and the miniature heater circuit that is arranged on its surface; It is characterized in that:
The consistency of thickness of described sensitive element layer, air chamber layer, insulation course and zone of heating; Thickness is 1mm-1.2mm;
Described air chamber layer is made up of air chamber body and air chamber, and air chamber is the inside that T shape structure is formed at the air chamber body; The physical dimension of air chamber body is consistent with the sensitive element body, and the inner plenum shape area is corresponding with interior electrode;
Described miniature heater circuit is between insulation course and calandria, and the connection external circuit that passes through to go between.
2. plate type oxygen sensor according to claim 1, it is characterized in that: the profile of described sensitive element body, air chamber body, insulation course, calandria is the rectangular parallelepiped thin plate, and its consistent size, length are 50mm-60mm; Its width is 5mm-6mm.
3. as plate type oxygen sensor as described in the claim 2, it is characterized in that: described insulation course, calandria all adopt alumina material to be made by The tape casting.
4. as plate type oxygen sensor as described in the claim 2, it is characterized in that: described sensitive element body, air chamber body adopt zirconia material to be made by The tape casting.
5. plate type oxygen sensor as described in selecting as claim 1-4 is characterized in that: the air chamber of described air chamber layer is T shape structure and is of a size of: head length is square, and it is long to be 5mm-8mm; Wide is 3mm-4mm; The afterbody rectangle, it is long to be 35mm-40mm, wide is 0.8mm-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201444115U CN201628699U (en) | 2010-03-30 | 2010-03-30 | Flat-plate oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201444115U CN201628699U (en) | 2010-03-30 | 2010-03-30 | Flat-plate oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201628699U true CN201628699U (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201444115U Expired - Fee Related CN201628699U (en) | 2010-03-30 | 2010-03-30 | Flat-plate oxygen sensor |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018283A (en) * | 2012-12-25 | 2013-04-03 | 珠海市香之君电子有限公司 | Chip type oxygen sensor |
| CN103207227A (en) * | 2013-03-21 | 2013-07-17 | 无锡隆盛科技股份有限公司 | Manufacturing method for oxygen sensor chips |
| CN103412018A (en) * | 2013-08-19 | 2013-11-27 | 郑龙华 | Composite heating electrode of planar oxygen sensor and manufacturing method thereof |
| CN108760864A (en) * | 2018-06-06 | 2018-11-06 | 成都科锐传感技术有限公司 | Chip oxygen sensor and preparation method thereof without extra insulation and bending compensation |
| CN111521661A (en) * | 2020-05-25 | 2020-08-11 | 深圳安培龙科技股份有限公司 | Reference pump current type oxygen sensor |
-
2010
- 2010-03-30 CN CN2010201444115U patent/CN201628699U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018283A (en) * | 2012-12-25 | 2013-04-03 | 珠海市香之君电子有限公司 | Chip type oxygen sensor |
| CN103207227A (en) * | 2013-03-21 | 2013-07-17 | 无锡隆盛科技股份有限公司 | Manufacturing method for oxygen sensor chips |
| CN103412018A (en) * | 2013-08-19 | 2013-11-27 | 郑龙华 | Composite heating electrode of planar oxygen sensor and manufacturing method thereof |
| CN103412018B (en) * | 2013-08-19 | 2016-08-10 | 郑龙华 | Plate type oxygen sensor composite heating electrode and manufacture method thereof |
| CN108760864A (en) * | 2018-06-06 | 2018-11-06 | 成都科锐传感技术有限公司 | Chip oxygen sensor and preparation method thereof without extra insulation and bending compensation |
| CN111521661A (en) * | 2020-05-25 | 2020-08-11 | 深圳安培龙科技股份有限公司 | Reference pump current type oxygen sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FOSHAN KEAO ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHENG LONGHUA Effective date: 20140228 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 341000 GANZHOU, JIANGXI PROVINCE TO: 528300 FOSHAN, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140228 Address after: 528300, No. 20 embankment road, Beijiao neighborhood committee, Beijiao Town, Shunde District, Guangdong, Foshan Patentee after: Foshan Keao Electronic Technology Co., Ltd. Address before: 341000 Jiangxi province Zhanggong District of Ganzhou City, highway 106, women's and children's hospital family building Room 601 Patentee before: Zheng Longhua |
|
| 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: 20101110 Termination date: 20160330 |