CN104977346A - Ammonia gas sensor - Google Patents
Ammonia gas sensor Download PDFInfo
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- CN104977346A CN104977346A CN201510366623.5A CN201510366623A CN104977346A CN 104977346 A CN104977346 A CN 104977346A CN 201510366623 A CN201510366623 A CN 201510366623A CN 104977346 A CN104977346 A CN 104977346A
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- air intake
- intake opening
- air inlet
- substrate
- reaction zone
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Abstract
The invention relates to an ammonia gas sensor. The sensor comprises an upper substrate, a middle substrate, and a lower substrate; a certain space exists between the upper substrate and the middle substrate; a neighbored air intake area and a reaction area are formed in the space, and the air intake area and the reaction area are isolated from each other. The upper substrate is provided with a first air inlet and a second air inlet, the first air inlet is communicated with the air intake area, and the second air inlet is communicated with the reaction area. Multiple second heaters are sequentially arranged on the upper substrate from the position next to the second air inlet. The middle substrate is provided with an oxygen pump, a first oxygen sensor, and a second oxygen sensor; the first oxygen sensor is arranged on a position near the first air inlet of the air intake area; the second oxygen sensor is arranged on the end, which is far from the second air inlet, of the reaction area, and the oxygen pump is arranged on a position next to the second air inlet. The provided ammonia gas sensor can precisely detect the ammonia gas content of detected gas.
Description
Technical field
The present invention relates to gas sensor, particularly a kind of ammonia gas sensor.
Background technology
Along with improving constantly and the growing interest of society to environmental quality of people's living standard, people more and more need to detect various poisonous, harmful gas, all propose high requirement to gas sensor to the monitoring of atmospheric pollution and industrial gaseous waste.Such as, in vehicle maintenance service, process not exclusively has ammonia and discharges, and therefore just needs to apply ammonia gas sensor.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome the incomplete deficiency of existing vehicle maintenance service, the invention provides a kind of ammonia gas sensor.
The technical solution adopted for the present invention to solve the technical problems is: a kind of ammonia gas sensor, comprise upper substrate, middle level substrate and underlying basal, between described upper substrate and middle level substrate, there is certain space, be formed with adjacent air inlet area and reaction zone in described space, described air inlet area and reaction zone isolated; Described upper substrate offers the first air intake opening and the second air intake opening, the first air intake opening is communicated with air inlet area, and the second air intake opening is communicated with reaction zone; Described upper substrate is provided with multiple second calandria successively from the position near the second air intake opening; Described middle level substrate is provided with oxygen pump, the first lambda sensor and the second lambda sensor, described first lambda sensor is positioned at the position near the first air intake opening of air inlet area, described second lambda sensor is positioned at one end away from the second air intake opening of reaction zone, and described oxygen pump is positioned at the position near the second air intake opening; Described underlying basal is provided with the first calandria, and described first calandria is always past from the position near the first air intake opening on the substrate of middle level to be extended near the position of the second lambda sensor; Described upper substrate is provided with three the second calandrias successively from the position near the second air intake opening, and three the second calandrias extend to the position of close second lambda sensor from the position near the second air intake opening.
Described first air intake opening is positioned at one end of the close air inlet area of reaction zone, and the second air intake opening is positioned at one end of the close reaction zone of air inlet area.
The invention has the beneficial effects as follows, ammonia gas sensor of the present invention, accurately can draw the ammonia level detected in gas.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the optimum embodiment of ammonia gas sensor of the present invention.
In figure 10, upper substrate, the 11, first air intake opening, the 12, second air intake opening, the 13, second calandria, 20, middle level substrate, 21, oxygen pump, 22, the first lambda sensor, the 23, second lambda sensor, 30, underlying basal, 31, the first calandria, 40, air inlet area, 50, reaction zone.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1, a kind of ammonia gas sensor of the present invention, comprise upper substrate 10, middle level substrate 20 and underlying basal 30, between described upper substrate 10 and middle level substrate 20, there is certain space, be formed with adjacent air inlet area 40 and reaction zone 50 in described space, described air inlet area 40 and reaction zone 50 isolated.
Described upper substrate 10 offers the first air intake opening 11 and the second air intake opening 12, described first air intake opening 11 is positioned at one end of the close air inlet area 40 of reaction zone 50, second air intake opening 12 is positioned at one end of the close reaction zone 50 of air inlet area 40, and the first air intake opening 11 is communicated with air inlet area 40, the second air intake opening 12 is communicated with reaction zone 50.
Described upper substrate 10 is provided with three the second calandrias 13 successively from the position near the second air intake opening 12; Three the second calandrias 13 extend to the position of close second lambda sensor 23 from the position near the second air intake opening 12.
Described middle level substrate 20 is provided with oxygen pump 21, first lambda sensor 22 and the second lambda sensor 23, described first lambda sensor 22 is positioned at the position near the first air intake opening 11 of air inlet area 40, described second lambda sensor 23 is positioned at one end away from the second air intake opening 12 of reaction zone 50, and described oxygen pump 21 is positioned at the position near the second air intake opening 12.
Described underlying basal 30 is provided with the first calandria 31, and described first calandria 31 is always past from the position near the first air intake opening 11 on middle level substrate 20 to be extended near the position of the second lambda sensor 23.
Principle of the present invention is as follows:
According to chemical formula: NH3+O2 → N2+H2O (600 DEG C ~ 700 DEG C), can know, ammonia, at (600 DEG C ~ 700 DEG C) and oxygen combustion, generates nitrogen and water after reaction.
According to above condition, as shown in Figure 1,
First lambda sensor 22, detecting the oxygen level at the first air intake opening 11 place, gained oxygen level numerical value, is the initial value of current detection gas oxygen content, is designated as O2 (initial value).Because air inlet area 40 and reaction zone 50 isolate, the oxygen level at the first air intake opening 11 place can not be subject to the impact of reaction zone, the initial value of stable detection gas oxygen content can be detected.
Oxygen pump 21, is burnt in reaction zone 50 by the oxygen pumping into steady state value from the second air intake opening 12, is designated as O2 (steady state value).
Second lambda sensor 23, remaining oxygen content after detection reaction district 50 combustion reaction, is designated as O2 (after reaction surplus value).
By drawing above, that falls with ammonia gas react can be expressed as containing oxygen value: O2 (reacting value):
O2 (initial value)+O2 (steady state value)-O2 (after reaction surplus value)=O2 (reacting value)
Detected by ammonia gas sensor of the present invention, draw reacting value O2, according to chemical formula: NH3+O2 → N2+H2O, trim: 4NH3+3O2=2N2+6H2O, the ammonia numerical value content detected in gas can be drawn.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.
Claims (2)
1. an ammonia gas sensor, it is characterized in that: comprise upper substrate, middle level substrate and underlying basal, between described upper substrate and middle level substrate, there is certain space, in described space, be formed with adjacent air inlet area and reaction zone, described air inlet area and reaction zone isolated; Described upper substrate offers the first air intake opening and the second air intake opening, the first air intake opening is communicated with air inlet area, and the second air intake opening is communicated with reaction zone; Described upper substrate is provided with multiple second calandria successively from the position near the second air intake opening; Described middle level substrate is provided with oxygen pump, the first lambda sensor and the second lambda sensor, described first lambda sensor is positioned at the position near the first air intake opening of air inlet area, described second lambda sensor is positioned at one end away from the second air intake opening of reaction zone, and described oxygen pump is positioned at the position near the second air intake opening; Described underlying basal is provided with the first calandria, and described first calandria is always past from the position near the first air intake opening on the substrate of middle level to be extended near the position of the second lambda sensor; Described upper substrate is provided with three the second calandrias successively from the position near the second air intake opening, and three the second calandrias extend to the position of close second lambda sensor from the position near the second air intake opening.
2. ammonia gas sensor as claimed in claim 1, it is characterized in that: described first air intake opening is positioned at one end of the close air inlet area of reaction zone, the second air intake opening is positioned at one end of the close reaction zone of air inlet area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366623.5A CN104977346A (en) | 2015-06-28 | 2015-06-28 | Ammonia gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366623.5A CN104977346A (en) | 2015-06-28 | 2015-06-28 | Ammonia gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104977346A true CN104977346A (en) | 2015-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510366623.5A Pending CN104977346A (en) | 2015-06-28 | 2015-06-28 | Ammonia gas sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN104977346A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548277A (en) * | 2016-01-14 | 2016-05-04 | 苏州大学 | Ammonia gas sensor based on squaric acid derivatives and preparation method and application of ammonia gas sensor |
| CN105572174A (en) * | 2016-01-14 | 2016-05-11 | 苏州大学 | Acetic acid gas sensor based on azobenzene compound and preparation method and application of acetic acid gas sensor |
-
2015
- 2015-06-28 CN CN201510366623.5A patent/CN104977346A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548277A (en) * | 2016-01-14 | 2016-05-04 | 苏州大学 | Ammonia gas sensor based on squaric acid derivatives and preparation method and application of ammonia gas sensor |
| CN105572174A (en) * | 2016-01-14 | 2016-05-11 | 苏州大学 | Acetic acid gas sensor based on azobenzene compound and preparation method and application of acetic acid gas sensor |
| CN105548277B (en) * | 2016-01-14 | 2018-03-23 | 苏州大学 | A kind of ammonia gas sensor based on squaric acid derivertives and its production and use |
| CN105572174B (en) * | 2016-01-14 | 2018-07-06 | 苏州大学 | A kind of acetic gas sensor of azo-based benzene-like compounds and its preparation method and application |
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| PB01 | Publication | ||
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Application publication date: 20151014 |