CN206450659U - The gas concentration detection apparatus shunted based on air channel - Google Patents
The gas concentration detection apparatus shunted based on air channel Download PDFInfo
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- CN206450659U CN206450659U CN201720067876.7U CN201720067876U CN206450659U CN 206450659 U CN206450659 U CN 206450659U CN 201720067876 U CN201720067876 U CN 201720067876U CN 206450659 U CN206450659 U CN 206450659U
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- China
- Prior art keywords
- gas
- reative cell
- air channel
- gas concentration
- concentration detection
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Abstract
The utility model is related to gas concentration detection field, more particularly to a kind of gas concentration detection apparatus shunted based on air channel.The utility model is used to detect in reacting gas, including light source, gas sensor, peripheral circuit and reative cell, the reative cell provided with light source and gas sensor and is connected respectively with peripheral circuit, and photocatalyst coating is coated with the reative cell；The beneficial effects of the utility model are：Gas sensor is arranged in reative cell, gas sensor is set to be not directly exposed in air, so as to protect it from outside air blast interference, simultaneously, the utility model is allow by opening light source initiation light-catalyzed reaction during reacting gas concentration excess load by setting light source and photocatalyst coating in reative cell, so that the significantly reacting gas concentration in abatement reative cell, gas sensor is disturbed from high concentration organic gas, and then extend its service life.
Description
Technical field
The utility model is related to gas concentration detection field, more particularly to a kind of gas concentration detection shunted based on air channel
Device.
Background technology
Existing gas sensor, such as electrochemical gas sensor, semiconductor gas sensor, need to the greatest extent in measurement
Amount avoids high wind from disturbing, while should also be as avoiding contact high concentration organic gas, etchant gas etc. for a long time, otherwise not only as far as possible
Data stabilization is influenced whether, and Sensor Poisoning can be caused to shorten the life-span.With life-span universal shorter electrochemical gas
Exemplified by sensor, air-flow especially normal direction air-flow, which enters sensor, can cause the unstable data of sensor, drift, short life etc.
Problem, and sensor internal electrolyte then can be directly lost in prolonged high concentration organic gas exposure, so as to shorten sensor
Service life.
Utility model content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of gas concentration detection shunted based on air channel
Device, allows gas sensor to be worked in the air-flow environment of relative weak, while making in environmental gas concentration excess load
With controllable photocatalyst technology abatement reacting gas so as to protect sensor.
The utility model is realized by following technical measures, using the gas concentration detection apparatus shunted based on air channel,
For detecting reacting gas, including light source, gas sensor, peripheral circuit and reative cell, in the reative cell provided with light source and
Gas sensor is simultaneously connected with peripheral circuit respectively, and photocatalyst coating is coated with the reative cell.After the technical program,
Organic vapor concentrations in the degradable reative cell of light-catalyzed reaction induced by means of light source photocatalyst coating are so as to solve gas
Sensor exposes the problem of causing the lost of life because of long time high concentration organic gas, while the structure shunted by air channel makes gas
Body sensor can complete gas concentration detection work in the air-flow environment of relative weak.
Preferably, the external shunt duct of reative cell, the shunt duct includes main air duct and bypass air channel, it is described
The main air duct of shunt duct is connected by bypassing air channel with the reative cell, and the main air duct is provided with air-stream generating device.Adopt
It is easy to reacting gas to complete to detect by air channel flow dividing structure with this preferred scheme.
Preferably, the reative cell is enclosed construction or/and is in communication with the outside provided with ventilating structure, the ventilating structure
Or/and by aiding in air channel to be in communication with the outside.Using sky when gas concentration detection is accelerated after this preferred scheme in reative cell
Gas convection current, so that the time required to shortening detection.
As an improvement, the main air duct or/and bypass air channel or/and auxiliary air channel are anti-provided with preventing reacting gas from entering
The gas of room is answered to prevent device.This improvement project makes gas sensor isolate in a non-operative state with extraneous reacting gas, makes
The interference of extraneous organic gas can be avoided after light-catalyzed reaction terminates by obtaining gas sensor, while self-enclosed school can be completed
Quasi- regulation, is solved because null offset needs periodically to go the problem of testing agency calibrates during gas sensor is used for a long time, not only
The working service of sensor is facilitated, the reliability of monitored gas environment is also enhanced.
The utility model makes gas sensor be not directly exposed to air by the way that gas sensor is arranged in reative cell
In, so that outside air blast interference is protected it from, meanwhile, light source and photocatalyst coating are set in the utility model reative cell, led to
The sensor concentration value of peripheral circuit monitoring gas sensor feedback is crossed, by opening when alloing reacting gas concentration excess load
Light source triggers light-catalyzed reaction, so that the significantly reacting gas concentration in abatement reative cell, makes gas sensor from high concentration
Organic gas is disturbed, and then extends its service life.
Brief description of the drawings
The utility model is further described below in conjunction with the accompanying drawings.
Accompanying drawing 1 is the structural representation of the utility model embodiment 1.
Accompanying drawing 2 is the structural representation of the utility model embodiment 2.
Accompanying drawing 3 is the structural representation of the utility model embodiment 3.
Shown in figure：
1st, main air duct, 2, bypass air channel, 3, reative cell, 4, light source, 5, auxiliary air channel, 6, ventilating structure, 7, gas sensing
Device, 8, air-stream generating device, 9, reacting gas.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the utility model, below in conjunction with this reality
With the accompanying drawing in new multiple embodiments, the technical measures in the utility model embodiment are clearly and completely described, shown
So, described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.It is new based on this practicality
Embodiment in type, the every other embodiment that those skilled in the art are obtained under the premise of creative work is not made,
Protection domain of the present utility model should all be belonged to.
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1：
Referring to the drawings 1, the utility model provides the gas concentration detection apparatus shunted based on air channel, for detecting reaction gas
Light source 4 and gas sensing are provided with body 9, including light source 4, gas sensor 7, peripheral circuit and reative cell 3, the reative cell 3
Device 7 is simultaneously connected with peripheral circuit respectively, and photocatalyst coating, the external shunting wind of reative cell 3 are coated with the reative cell 3
Road, the shunt duct includes main air duct 1 and bypass air channel 2, and the main air duct 1 of the shunt duct is by bypassing air channel 2 and institute
State reative cell 3 to connect, the main air duct 1 is provided with air-stream generating device 8.
In the present embodiment, bypass air channel 2 can have one or more, and can be interlaced with each other；It can be set such as in main air duct 1
The air-stream generating devices such as blower fan, fan, air pump 8, for producing air-flow.
When carrying out gas concentration detection, extraneous reacting gas 9 is set to enter main air duct by the effect of air-stream generating device 8
1 and quickly flow；Now, the partial reaction gas 9 in main air duct 1 is diffused into by bypassing air channel 2 with faint flow velocity
For the reative cell 3 of enclosed construction；Captured into the reacting gas 9 in reative cell 3 by gas sensor 7, can now pass through periphery
Circuit reads the concentration information for the reacting gas 9 that gas sensor 7 is fed back, and described peripheral circuit includes power supply, monitoring list
Member, control unit and display unit etc., can be realized using prior art and will not be repeated here.
When the excessive concentration of reacting gas 9, peripheral circuit makes the electrified light emitting of light source 4, promotes the photocatalyst in reative cell 3
Light-catalyzed reaction occurs for coating, so that the organic vapor concentrations in degradation reaction room 3, and then gas sensor 7 is protected.
Embodiment 2：
Referring to the drawings 2, the reative cell 3 is in communication with the outside by ventilating structure 6, and the ventilating structure 6 has larger
Gas diffusion resistance, can be realized using micro hole or ventilated membrane etc..
When carrying out gas concentration detection, extraneous reacting gas 9 is set to enter main air duct by the effect of air-stream generating device 8
1 and quickly flow；Now due to being acted on by high velocity air, the intersection in main air duct 1 with bypass air channel 2 forms certain negative
Pressure, in the presence of pressure differential, part external world reacting gas 9 slowly enters reative cell 3 by ventilating structure 6, therefore compares
In embodiment 1, ventilating structure 6 accelerates the inside and outside gas concentration balance of reative cell 3, and then shortens the inspection of gas sensor 7
The time required to surveying.
Embodiment 3：
Referring to the drawings 3, the small pore structure 6 is by aiding in air channel 5 to be in communication with the outside, and this embodiment is based on and better than upper
Two kinds of embodiments are stated, the main air duct 1 and/or the bypass air channel 2 and/or the auxiliary air channel 5 are provided with outer for preventing
The gas that boundary's reacting gas enters detection air chamber prevents device, and those skilled in the art need not pay creative work and i.e. can
It is appreciated and understood that, such as using check valve, magnetic valve, plug, the air channel structure with larger diffusional resistance, therefore shown attached
Do not annotated in Fig. 3.
Based on the above, when stopping gas concentration detection, by being arranged at main air duct 1 and/or the bypass air channel 2
And/or the gas on the auxiliary air channel 5 prevents device from preventing extraneous reacting gas 9 from going successively to reative cell 3, so that reaction
No longer with the external world gas exchanges occur for room 3, now, by making the electrified light emitting of light source 4, promote the photocatalyst coating in reative cell 3
Generation light-catalyzed reaction, the degradable organic vapor concentrations come into reative cell 3, so that gas sensor 7 is as far as possible
Preserved in clean air to extend its service life.
In the present embodiment, the air in the electrified light emitting of light source 4, sustainable purification reative cell 3 is made by peripheral circuit, with
To the gas of cleaning is similar to, so as to facilitate gas sensor 7 to carry out zero point correction after occurring null offset.
Described zero point correction step is as follows：First, this is positioned over based on the gas concentration detection apparatus that air channel is shunted
Outdoor, opening the air-stream generating devices 8 such as blower fan, fan, air pump makes in reative cell 3 full of approximate clean air；Secondly, pass through
The gases such as check valve, magnetic valve, plug, air channel structure with larger diffusional resistance prevent device from preventing extraneous reacting gas
9 go successively to reative cell 3；Again, make the electrified light emitting of light source 4 and keep the state for a period of time, make the photocatalysis in reative cell 3
Reaction is fully carried out, and then the air in reative cell 3 is further purified；Finally, gas is read by peripheral circuit to pass
The concentration signal for the reacting gas 9 that sensor 7 feeds back, output signal now is the zero point concentration signal of reacting gas 9, so that complete
Into the zero point correction of gas sensor 7.
Certainly, described above is also not limited to the example above, and technical characteristic of the utility model without description can lead to
Cross or realized using prior art, be will not be repeated here；Above example and accompanying drawing are merely to illustrate technology of the present utility model
Scheme is not to limitation of the present utility model, with reference to preferred embodiment the utility model is described in detail, originally
Field it is to be appreciated by one skilled in the art that those skilled in the art institute in essential scope of the present utility model
The variations, modifications, additions or substitutions made are without departure from objective of the present utility model, and should also belong to right of the present utility model will
Seek protection domain.
Claims (4)
1. the gas concentration detection apparatus shunted based on air channel, for detecting reacting gas (9), including light source (4), gas sensing
Device (7) and peripheral circuit, it is characterised in that：Also include in reative cell (3), the reative cell (3) provided with light source (4) and gas biography
Sensor (7) is simultaneously connected with peripheral circuit respectively, and photocatalyst coating is coated with the reative cell (3).
2. the gas concentration detection apparatus according to claim 1 shunted based on air channel, it is characterised in that：The reative cell
(3) external shunt duct, the shunt duct includes main air duct (1) and bypass air channel (2), the main air duct of the shunt duct
(1) connected by bypassing air channel (2) with the reative cell (3), the main air duct (1) is provided with air-stream generating device (8).
3. the gas concentration detection apparatus according to claim 2 shunted based on air channel, it is characterised in that：The reative cell
(3) enclosed construction or/and to be in communication with the outside provided with ventilating structure (6), the ventilating structure (6) or/and by aiding in air channel
(5) it is in communication with the outside.
4. the gas concentration detection apparatus shunted based on air channel according to Claims 2 or 3, it is characterised in that：The master
Air channel (1) or/and bypass air channel (2) or/and auxiliary air channel (5) are provided with the gas for preventing reacting gas (9) from entering reative cell (3)
Body prevents device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067876.7U CN206450659U (en) | 2017-01-20 | 2017-01-20 | The gas concentration detection apparatus shunted based on air channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067876.7U CN206450659U (en) | 2017-01-20 | 2017-01-20 | The gas concentration detection apparatus shunted based on air channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206450659U true CN206450659U (en) | 2017-08-29 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720067876.7U Expired - Fee Related CN206450659U (en) | 2017-01-20 | 2017-01-20 | The gas concentration detection apparatus shunted based on air channel |
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| CN (1) | CN206450659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720964A (en) * | 2020-05-26 | 2021-11-30 | 宁波方太厨具有限公司 | Formaldehyde detection system and air purification device applying same |
-
2017
- 2017-01-20 CN CN201720067876.7U patent/CN206450659U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720964A (en) * | 2020-05-26 | 2021-11-30 | 宁波方太厨具有限公司 | Formaldehyde detection system and air purification device applying same |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170829 Termination date: 20200120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |