CN202404061U - Anti-interference analyzer for detecting trace formaldehyde in air - Google Patents
Anti-interference analyzer for detecting trace formaldehyde in air Download PDFInfo
- Publication number
- CN202404061U CN202404061U CN2011205208718U CN201120520871U CN202404061U CN 202404061 U CN202404061 U CN 202404061U CN 2011205208718 U CN2011205208718 U CN 2011205208718U CN 201120520871 U CN201120520871 U CN 201120520871U CN 202404061 U CN202404061 U CN 202404061U
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- formaldehyde
- air
- control circuit
- galvanochemistry
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Abstract
The utility model discloses an anti-interference analyzer for detecting trace formaldehyde in air, which comprises a shell, a sensor group, a controller for processing data, and an indication display, wherein the sensor group comprises a semiconductor sensor and an electrochemistry formaldehyde sensor, wherein the semiconductor sensor and the electrochemistry formaldehyde sensor are connected with the control circuit, the semiconductor sensor is used for detecting concentration of an interference gas, and the control circuit is used for analyzing the concentration of the interference gas and controlling whether the electrochemistry formaldehyde sensor to be connected according to the analysis result; and the indication display is connected with the control circuit and used for displaying a numerical valve of the content of the formaldehyde in air, detected by the electrochemistry formaldehyde sensor. During working, the semiconductor sensor firstly works, and the electrochemistry formaldehyde sensor is inhibited from being opened when a signal of a high-concentration interference gas exists, and thus the service life of the electrochemistry formaldehyde sensor is prolonged.
Description
Technical field
The utility model relates to trace formaldehyde analytical approach and instrument in a kind of detection air, the analytical instrument of trace formaldehyde in particularly a kind of jamproof detection air.
Background technology
The air trace formaldehyde is one of main dusty gas in the air, improve content and source that air quality at first will detect formaldehyde in the air.
At present, most air formaldehyde analyser all adopts electrochemical sensor to analyze content of formaldehyde, and its antijamming capability is relatively poor, for methyl alcohol, ethanol and carbon monoxide strong signal is arranged also.Because formaldehyde is merely 0.07mg/m3 at indoor permission content, very the interference gas of trace will cause data distortion, so, the usefulness that the analyser of electrochemical sensor mode only can for referencial usely be analyzed.Accurately detect like need, adopt the chemical colour reaction reaction like GB detection side rule, the chemical colour reaction reaction needed is used some corrosive liquids; And need air pump to absorb; And with standard color card comparison, thereby draw content of formaldehyde numerical value in the air, its shortcoming is that the operator is required height; The main frame volume is heavy, and is not portable.The utility model is a starting point with portable and practicality, in conjunction with semiconductor transducer and sensor array technology, develops jamproof air formaldehyde analyser; Both had the light and easy-operating advantage of electrochemical sensor, and can avoid the interference of various chaff interferences again, cost price is cheap; Be suitable for resident family and hospital, factories and miness use; The air quality of surrounding being monitored in real time, and can get rid of interference such as methyl alcohol, ethanol and carbon monoxide, be familiar with the living and working environment of oneself for people; And then improve the quality of life of oneself, crucial meaning is arranged.
The utility model content
The utility model technical matters to be solved provides the analytical instrument of trace formaldehyde in a kind of jamproof detection air.
The technical scheme that the utility model solves its technical matters is:
The analytical instrument of trace formaldehyde in a kind of jamproof detection air; Control circuit and the indicated number screen handled by housing, sensor groups, to data are formed; After the data of sensor groups collection are handled through microcontroller; Indication and the indicated number of air content of formaldehyde screen is gone up and is shown in working order, and described control circuit is connected with air content of formaldehyde indicated number screen with sensor groups.Said sensor groups is by galvanochemistry formaldehyde sensor and SnO
2The based semiconductor sensor is formed, and the sensitivity of described galvanochemistry formaldehyde sensor PARA FORMALDEHYDE PRILLS(91,95) is very high, chaff interferences such as ethanol, methyl alcohol, carbon monoxide is also had than large-signal react.Described SnO
2The based semiconductor sensor has very high sensitivity to air pollutants such as ethanol, methyl alcohol, carbon monoxide, but the sensitivity of PARA FORMALDEHYDE PRILLS(91,95) is very low,
Master reference is the galvanochemistry formaldehyde sensor; Signal reaction appears in this sensor meeting PARA FORMALDEHYDE PRILLS(91,95), methyl alcohol, ethanol and the multiple dusty gas of carbon monoxide, and the galvanochemistry formaldehyde sensor has characteristics such as accuracy of detection is higher, PARA FORMALDEHYDE PRILLS(91,95) ten minutes sensitivity, still; Also exist the chaff interference kind many; Be prone to when running into the high concentration chaff interference poison, numerical value falls after rise slow, the shortcoming of the lost of life.In order to remedy the deficiency of galvanochemistry formaldehyde sensor, the utility model adopts SnO
2The based semiconductor sensor carries out signal compensation and liquidates SnO through control circuit
2The based semiconductor sensor is relatively sensitiveer to methyl alcohol, ethanol and carbon monoxide, and the PARA FORMALDEHYDE PRILLS(91,95) gas reaction is very low, and therefore, both sensors use simultaneously, can get rid of the interference of interference gas such as methyl alcohol, ethanol and carbon monoxide.Promptly work as SnO
2When the output of high signal all appears in based semiconductor sensor and galvanochemistry formaldehyde sensor, can be judged to be interference gas and disturb, and the galvanochemistry formaldehyde sensor is high signal output, SnO
2When low signal output appears in the based semiconductor sensor, can judge it is that formaldehyde pollutes numerical value.
In order to solve the percussive action of high concentration interference gas, when detecting air, open SnO earlier to the galvanochemistry formaldehyde sensor
2The based semiconductor sensor when detecting to low signal, can be opened the galvanochemistry formaldehyde sensor, SnO
2When the based semiconductor sensor is high signal, forbid opening the galvanochemistry formaldehyde sensor, prevented of the impact of high concentration interference gas, prolonged the serviceable life of galvanochemistry formaldehyde sensor the galvanochemistry formaldehyde sensor.
Described sensor groups and data processing and control circuit comprise signal condition, data processing, data storage, duty setting section.For sensor groups has air hole 4, sensor links to each other with surrounding environment through pore 4 on the housing of air formaldehyde analyzer.Described indicated number screen comprises pilot lamp prompting or liquid crystal display data, buzzer warning.
The beneficial effect of the utility model is:
The utility model advantages of small volume, easy to carry, lower to operating personnel's requirement, accuracy of detection is better, and antijamming capability is very strong, long service life.
Description of drawings
Fig. 1 is the composition frame chart of the utility model formaldehyde detecting device;
Fig. 2 is the utility model formaldehyde detecting device outside drawing.
Embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.
As depicted in figs. 1 and 2, the analytical instrument of trace formaldehyde in a kind of jamproof detection air comprises housing 7, sensor groups, to control circuit 3 and indicated number screen 5 that data are handled, and said sensor groups comprises SnO
2Based semiconductor sensor 1 and galvanochemistry formaldehyde sensor 2; SnO
2Based semiconductor sensor 1 all is connected with control circuit 3 with galvanochemistry formaldehyde sensor 2; SnO
2Based semiconductor sensor 1 is used to detect interference gas concentration; Interference gas concentration is passed to control circuit 3 to be analyzed; Whether control circuit 3 is connected according to analysis result control galvanochemistry formaldehyde sensor 2, and concrete steering logic is: when interference gas concentration is high, close galvanochemistry formaldehyde sensor 2; When interference gas concentration is hanged down, connect galvanochemistry formaldehyde sensor 2; Indicated number screen 5 is connected with control circuit 3, is used for the air content of formaldehyde numerical value that shows that galvanochemistry formaldehyde sensor 2 monitors.
Press the switch 6 on the housing, instrument is started working, and the air that contains formaldehyde or interference gas gets into sensor groups through air hole 4, by the SnO in the sensor groups
2Based semiconductor sensor 1 absorbs SnO with galvanochemistry formaldehyde sensor 2
2When the high signal of based semiconductor sensor 1 appearance is exported, after data are handled through control circuit 3, then do not give the galvanochemistry formaldehyde sensor 2 energisings, and on the indicated number screen, provide caution, inform interference gas concentration height.Work as SnO
2When low signal output appears in based semiconductor sensor 1, after data are handled through control circuit 3, then give the galvanochemistry formaldehyde sensor 2 energisings, content of formaldehyde in the beginning Measurement of Air, and on the indicated number screen, provide content of formaldehyde numerical value in the air.During work, described SnO
2The based semiconductor sensor is at first worked, and when finding that high concentration interference gas signal is arranged, forbids opening the galvanochemistry formaldehyde sensor, has prolonged galvanochemistry formaldehyde sensor serviceable life.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of the utility model accompanying claims according to above-mentioned explanation.
Claims (1)
1. the analytical instrument of trace formaldehyde in the jamproof detection air is characterized in that, comprises housing, sensor groups, to control circuit and indicated number screen that data are handled, and said sensor groups comprises semiconductor transducer and galvanochemistry formaldehyde sensor; Semiconductor transducer all is connected with control circuit with the galvanochemistry formaldehyde sensor; Semiconductor transducer is used to detect interference gas concentration, and whether control circuit is used for disturbing that gas concentration is analyzed and connecting according to analysis result control galvanochemistry formaldehyde sensor; The indicated number screen is connected with control circuit, is used for the air content of formaldehyde numerical value that shows that the galvanochemistry formaldehyde sensor monitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205208718U CN202404061U (en) | 2011-12-14 | 2011-12-14 | Anti-interference analyzer for detecting trace formaldehyde in air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205208718U CN202404061U (en) | 2011-12-14 | 2011-12-14 | Anti-interference analyzer for detecting trace formaldehyde in air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202404061U true CN202404061U (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205208718U Expired - Lifetime CN202404061U (en) | 2011-12-14 | 2011-12-14 | Anti-interference analyzer for detecting trace formaldehyde in air |
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| CN (1) | CN202404061U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990512A (en) * | 2017-11-17 | 2018-05-04 | 艾欧史密斯(中国)热水器有限公司 | The apparatus of air conditioning and its Analysis Methods for Formaldehyde and device |
| CN109669008A (en) * | 2019-01-04 | 2019-04-23 | 武汉四方光电科技有限公司 | A kind of formaldehyde examination device and Analysis Methods for Formaldehyde |
| CN110865148A (en) * | 2019-10-10 | 2020-03-06 | 莱克电气股份有限公司 | Formaldehyde detection method and device and air purifier |
| CN111272836A (en) * | 2014-03-26 | 2020-06-12 | Aeroqual有限公司 | Interference-free gas measurement |
| WO2021070705A1 (en) * | 2019-10-11 | 2021-04-15 | アルプスアルパイン株式会社 | Gas concentration measurement device |
-
2011
- 2011-12-14 CN CN2011205208718U patent/CN202404061U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272836A (en) * | 2014-03-26 | 2020-06-12 | Aeroqual有限公司 | Interference-free gas measurement |
| CN107990512A (en) * | 2017-11-17 | 2018-05-04 | 艾欧史密斯(中国)热水器有限公司 | The apparatus of air conditioning and its Analysis Methods for Formaldehyde and device |
| CN107990512B (en) * | 2017-11-17 | 2021-03-19 | 艾欧史密斯(中国)热水器有限公司 | Air conditioning equipment and formaldehyde detection method and device thereof |
| CN109669008A (en) * | 2019-01-04 | 2019-04-23 | 武汉四方光电科技有限公司 | A kind of formaldehyde examination device and Analysis Methods for Formaldehyde |
| CN109669008B (en) * | 2019-01-04 | 2021-04-30 | 四方光电股份有限公司 | Formaldehyde detection device and formaldehyde detection method |
| CN110865148A (en) * | 2019-10-10 | 2020-03-06 | 莱克电气股份有限公司 | Formaldehyde detection method and device and air purifier |
| WO2021068532A1 (en) * | 2019-10-10 | 2021-04-15 | 莱克电气股份有限公司 | Formaldehyde measurement method and apparatus, and air purifier |
| CN110865148B (en) * | 2019-10-10 | 2022-04-08 | 莱克电气股份有限公司 | Formaldehyde detection method and device and air purifier |
| WO2021070705A1 (en) * | 2019-10-11 | 2021-04-15 | アルプスアルパイン株式会社 | Gas concentration measurement device |
| JPWO2021070705A1 (en) * | 2019-10-11 | 2021-04-15 | ||
| CN114514423A (en) * | 2019-10-11 | 2022-05-17 | 阿尔卑斯阿尔派株式会社 | Gas concentration measuring device |
| JP7198940B2 (en) | 2019-10-11 | 2023-01-04 | アルプスアルパイン株式会社 | Gas concentration measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |
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| CX01 | Expiry of patent term |