CN202024980U - Improved structure of pressure buffer for oxygen sensor - Google Patents
Improved structure of pressure buffer for oxygen sensor Download PDFInfo
- Publication number
- CN202024980U CN202024980U CN2011200683147U CN201120068314U CN202024980U CN 202024980 U CN202024980 U CN 202024980U CN 2011200683147 U CN2011200683147 U CN 2011200683147U CN 201120068314 U CN201120068314 U CN 201120068314U CN 202024980 U CN202024980 U CN 202024980U
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- CN
- China
- Prior art keywords
- pressure buffer
- buffer device
- sensor
- pressure
- buffer body
- 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title abstract description 6
- 239000001301 oxygen Substances 0.000 title abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 title abstract description 6
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims description 23
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- -1 oxonium ion Chemical class 0.000 description 2
- 206010059875 Device ineffective Diseases 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to an improved structure of a pressure buffer for an oxygen sensor, comprising a pressure buffer body, a breathable film and an upper cover which are attached on an outer shell of the oxygen sensor. The axial lead of the pressure buffer body is provided with a pore which leads to an inner cavity of the sensor, the upper cover is provided with a corresponding air vent at the axial lead, the upper surface and the lower surface of the breathable film are glued between the pressure buffer body and the upper cover, a contact surface of the pressure buffer body glued with the lower surface of the breathable film is an outward convex sphere, and the centre of spherical curvature is located on the axial lead of the pore of the pressure buffer body. The improved structure provided by the utility model has the following advantages that the breathable film, the pressure buffer body and the upper cover are glued favorably and can not be deformed, so that the capability of the sensor against pressure fluctuation is improved, and the output variation of the sensor is smaller and the output of the sensor can be recovered soon during pressure change. The consistency of output variation between different sensors is also smaller, so the efficiency of mass production can be greatly improved.
Description
Technical field:
The utility model relates to a kind of detector, more specifically to a kind of structure-improved that is used for the pressure buffer device of lambda sensor.
Background technology:
In the prior art, being used for monitoring the most popular sensor of gox is the galvanic cell lambda sensor.The principle of work of galvanic cell lambda sensor is identical with battery, at least comprise a negative electrode and anode, middle the two is connected, be reduced the generation oxonium ion, oxonium ion is delivered to sacrificial anode and reacts with anode by electrolytic solution at the oxygen of negative electrode by liquid electrolyte.Electric current and oxygen concentration between negative electrode and anode are linear, can monitor the variation of oxygen concentration easily by the variation of measuring electric current.Its weak point is the fluctuation that can synchronously cause the sensor output performance when atmospheric pressure fluctuates, overcoming this defective method commonly used is to utilize the external setting pressure snubber assembly of sensor shell, this pressure buffer device is very high to the installation requirement of ventilated membrane, if being installed, improper meeting causes the ventilated membrane distortion, to cause whole pressure buffer device ineffective, the structure that therefore ventilated membrane is installed is further improved.
The utility model content:
The purpose of this utility model is the structure-improved that a kind of simple in structure, installation accuracy is high, compressive resistance fluctuation ability is strong pressure buffer device that is used for lambda sensor is provided at the prior art weak point.
The purpose of this utility model is to realize by following measure: a kind of structure-improved that is used for the pressure buffer device of lambda sensor, comprise the pressure buffer device body that is attached on the lambda sensor shell body, ventilated membrane, loam cake, pressure buffer device body axial line is provided with towards the pore of sensor inner chamber, loam cake has the air hole of a correspondence at the axial line place, on the ventilated membrane, lower surface is fitted between pressure buffer device body and the loam cake, it is characterized in that, this contact level of pressure buffer device that fits with the ventilated membrane lower surface is the sphere of an evagination, and the center of curvature of sphere is positioned on the axial line of pressure buffer device body pore.
The loam cake surface of contact that described and ventilated membrane upper surface are fitted be one with the corresponding concave spherical surface of pressure buffer device body evagination sphere, the center of curvature of concave spherical surface is on the axial line of loam cake air hole.
Compared with prior art, the structure-improved of the pressure buffer device that is used for lambda sensor that the utility model proposes, have following advantage: ventilated membrane and pressure buffer device body and loam cake are fitted good, indeformable, improved the ability of sensor counter pressure fluctuation, sensor output changes less and can very fast recovery when pressure changes.The variation consistance of exporting between the different sensors also diminishes, and is also useful greatly to the lifting of producing efficient in enormous quantities.
Description of drawings:
Fig. 1 installs back distortion synoptic diagram for the prior art ventilated membrane.
Fig. 2 is the structural representation of an embodiment the utility model proposes.
Embodiment:
Below in conjunction with accompanying drawing embodiment is elaborated: Fig. 1 installs back distortion synoptic diagram for the prior art ventilated membrane.Ventilated membrane and pressure buffer device body 5 and loam cake 2 fit into planar shaped, install and can not make ventilated membrane middle part projection 3 at that time, when ambient pressure becomes big, projection 3 is diminished, make the internal pressure of pressure buffer device become big, extraneous pressure variation just is easy to such an extent that be delivered to impact damper inside, is exactly that whole pressure buffer device is ineffective like this.
Fig. 2 is the structural representation of an embodiment the utility model proposes.Among the figure, a kind of structure-improved that is used for the pressure buffer device of lambda sensor comprises the pressure buffer device body 5, ventilated membrane 1, the loam cake 2 that are attached on the lambda sensor shell body.Pressure buffer device body 5 axial lines are provided with the pore 6 towards the sensor inner chamber, and loam cake 2 has the air hole 7 of a correspondence at the axial line place, and ventilated membrane 1 upper and lower surface is fitted between pressure buffer device body 5 and the loam cake 2.Pressure buffer device body 5 surface of contact that fit with ventilated membrane 1 lower surface are the sphere 4 of an evagination, and the center of curvature of sphere is positioned on the axial line of pressure buffer device body pore.Loam cake 2 surface of contact that described and ventilated membrane 1 upper surface are fitted be one with pressure buffer device body 5 evagination spheres 4 corresponding concave spherical surfaces, the center of curvature of concave spherical surface is on the axial line of loam cake air hole.The design of pore position on the pressure buffer device body increases the sphere of a projection like this, and is middle high, low all around.Like this from around when being installed in ventilated membrane on the pressure buffer device body, can utilize the cambered surface of projection that the gas in the pressure buffer device is discharged, apply by the pulling force around the middle mind-set to ventilated membrane simultaneously, prevent that the ventilated membrane fold from forming new space and changing transducer sensitivity output consistance.
The foregoing description does not constitute restriction of the present utility model, and all employings are equal to the technical scheme that form obtained of replacement or equivalent transformation, all drop within the protection domain of the present utility model.
Claims (2)
1. structure-improved that is used for the pressure buffer device of lambda sensor, comprise the pressure buffer device body that is attached on the lambda sensor shell body, ventilated membrane, loam cake, pressure buffer device body axial line is provided with towards the pore of sensor inner chamber, loam cake has the air hole of a correspondence at the axial line place, on the ventilated membrane, lower surface is fitted between pressure buffer device body and the loam cake, it is characterized in that, this contact level of pressure buffer device that fits with the ventilated membrane lower surface is the sphere of an evagination, and the center of curvature of sphere is positioned on the axial line of pressure buffer device body pore.
2. the structure-improved that is used for the pressure buffer device of lambda sensor according to claim 1, it is characterized in that, the loam cake surface of contact that described and ventilated membrane upper surface are fitted be one with the corresponding concave spherical surface of pressure buffer device body evagination sphere, the center of curvature of concave spherical surface is on the axial line of loam cake air hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200683147U CN202024980U (en) | 2011-03-15 | 2011-03-15 | Improved structure of pressure buffer for oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200683147U CN202024980U (en) | 2011-03-15 | 2011-03-15 | Improved structure of pressure buffer for oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202024980U true CN202024980U (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200683147U Expired - Fee Related CN202024980U (en) | 2011-03-15 | 2011-03-15 | Improved structure of pressure buffer for oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202024980U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558277A (en) * | 2013-11-04 | 2014-02-05 | 苏州工业园区传世汽车电子有限公司 | Oxygen sensor for internal combustion engine |
| CN112964773A (en) * | 2021-03-10 | 2021-06-15 | 西人马联合测控（泉州）科技有限公司 | Oxygen sensor and method for improving stability of oxygen sensor |
-
2011
- 2011-03-15 CN CN2011200683147U patent/CN202024980U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558277A (en) * | 2013-11-04 | 2014-02-05 | 苏州工业园区传世汽车电子有限公司 | Oxygen sensor for internal combustion engine |
| CN103558277B (en) * | 2013-11-04 | 2015-08-19 | 苏州工业园区传世汽车电子有限公司 | Oxygen sensor for internal combustion engine |
| CN112964773A (en) * | 2021-03-10 | 2021-06-15 | 西人马联合测控（泉州）科技有限公司 | Oxygen sensor and method for improving stability of oxygen sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20130315 |