CN202362264U - Indoor air quality detector - Google Patents
Indoor air quality detector Download PDFInfo
- Publication number
- CN202362264U CN202362264U CN2011204835064U CN201120483506U CN202362264U CN 202362264 U CN202362264 U CN 202362264U CN 2011204835064 U CN2011204835064 U CN 2011204835064U CN 201120483506 U CN201120483506 U CN 201120483506U CN 202362264 U CN202362264 U CN 202362264U
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- detection
- desorption
- air quality
- formaldehyde
- chamber
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses an indoor air quality detector which comprises a solid-phase extraction chamber, a desorption chamber, a movable tray, a gas sensitive sensor, a detecting box, an electrochemical sensor, a CPU (central processing unit) processor, an audible-visual alarm, and the like. According to the utility model, through adopting a solid-phase microextraction technology, the influence of interferential gas on detection is greatly reduced, and detection errors are reduced; meanwhile, the damages on the sensors caused by the interferential gas are also reduced, thereby greatly prolonging the service lives of the sensors. By using the indoor air quality detector disclosed by the utility model, the simultaneous online detection on various gases can be realized simply, rapidly and accurately, and the harms of harmful gases such as formaldehyde, benzene and ammonia to the human body can be reduced timely and effectively, therefore, the indoor air quality detector is suitable to be used on the occasions such as living, offices and workshops and the like.
Description
Technical field
The utility model belongs to a kind of checkout equipment, relates in particular to the on-the-spot fast detecting appearance that detects of a kind of IAQ.
Background technology
The raising day by day of Along with people's living standard, security incidents such as room air quality dissatisfaction take place again and again, and are serious day by day, therefore are necessary to set up a kind of easy, sensitive, quick, directly perceived, accurate, economic, comprehensive Detection of Air Quality method.In each family, the resident can oneself realize that it is that market is required that the air quality online in real time in room detects, the desire of the people.At present also do not have a kind of comparatively desirable field fast detection method, spectrophotometric receives the restriction of operating conditionss such as the water-bath or the concentrated sulphuric acid, and electrochemical assay is had relatively high expectations to sample pretreatment; Chromatography is limited by instrument and equipment; Sensor method cost is high, the life-span is short, and the fast detecting case on the market needs professional's operation now, and it is single to detect target component; Cost is high, and general family is difficult to popularize.
Therefore, inventing a kind of easy, quick, sensitive, comprehensive air quality on-line detector is in good time and necessity.Existing emerging technology can reduce the detection limit of gas detection like the introducing of technology such as micro-total analysis system, SPME, avoid interference, for the field quick detection portability provide bigger maybe.
Summary of the invention
The purpose of this invention is to provide a kind of IAQ detector, can be to the on-the-spot fast detecting that detects of IAQ.
In order to reach goal of the invention, the technical scheme that the utility model adopts is:
The Detection of Air Quality appearance that a kind of solid phase micro-extraction technique combines with the electrochemical sensor method.The disposable gas sample introduction is realized the detection of indoor main harmful gas formaldehyde, benzene, ammonia.
Above-mentioned detector comprises: gas automatic sampling device, SPME chamber, desorption chamber, motion pallet, detection case, collection box, data processing centre (DPC), audible-visual annunciator, power supply, detector switch, air pump, heating radiator, display, USB interface etc.
Be provided with the gas sampling pump in the gas automatic sampling device, link to each other, realize the automatic ration sample introduction with CPU.A metal screen has been fixed in the injection port outer end.
Be provided with extraction formaldehyde solid phase micro-extracting head, benzene extraction solid phase micro-extracting head, three kinds of extracting head of extraction of ammonia solid phase micro-extracting head in the SPME chamber, carry out extraction work simultaneously; Gas after the extraction is discharged by escape hole.Solid phase micro-extracting head is to have fixed the quartz fibre that scribbles the extraction stationary phase.
Be provided with formaldehyde desorption tank, benzene desorption tank, ammonia desorption tank in the desorption chamber, respectively with detection case in formaldehyde detect that groove, benzene detect groove, ammonia detects groove and connects.Be equipped with in the formaldehyde desorption tank to be equipped with in benzene desorbing agent, the ammonia desorption tank in formaldehyde desorbing agent, the benzene desorption tank ammonia desorbing agent is housed.Three filling openings (generalized case is in closed condition) are arranged in the upper end of desorption chamber, connect with formaldehyde desorption tank, benzene desorption tank, ammonia desorption tank respectively.Desorption chamber is fixed on the motion pallet.
Be provided with formaldehyde in the detection case and detect groove, benzene detection groove, ammonia detection groove, detect in the groove formaldehyde electrochemical sensor, benzene electrochemical sensor, ammonia electrochemical sensor are housed respectively.Be transported to data center by the sensor picked up signal; The liquid that has detected gets into collection box through flow export respectively.
Be provided with formaldehyde in the collection box and detect liquid and reclaim box, benzene and detect that liquid reclaims box, ammonia detects liquid and reclaims box, detect with formaldehyde respectively that groove, benzene detect groove, ammonia detects groove and links to each other, connector is all in the bottom of detection groove.
Be provided with A/D converter, CPU, heating radiator in the data processing centre (DPC); Be provided with USB interface outward, make things convenient for the mobile processing of data etc.Be transported to display by the CPU process result, and judge whether to carry out alarm command.
In sum, the utility model adopts solid phase micro-extraction technique, has significantly reduced the influence of interference gas to detecting, and has reduced the detection error; Simultaneously also reduced the infringement of interference gas, prolonged the life-span of sensor greatly sensor.The setting of multiple solid phase micro-extracting head has realized multiple gases online detection simultaneously.The application of electrochemical sensor and CPU processor, easy and simple to handle, detect fast, the result is accurate and visual.Therefore, the utility model is a kind of indoor comprehensive Detection of Air Quality appearance towards family, masses.
Description of drawings
Accompanying drawing 1 is the theory diagram of the utility model.
Accompanying drawing 2 is the structural representation of the utility model.
Accompanying drawing 3 is the SPME cell structure synoptic diagram of the utility model.
Accompanying drawing 4 is the desorption chamber structural representation of the utility model.
Accompanying drawing 5 is the detection case structural representation of the utility model.
Accompanying drawing 6 is the interface that is provided with of the utility model gas detection.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
A kind of IAQ detector is the theory diagram of the utility model shown in accompanying drawing 1, can know that gas passes through automatic sampler and gets into the SPME chamber; After extraction finished, extracting head was through the desorption chamber that is moved into of motion pallet, behind desorption; Desorption liquid gets into the detection groove in the detection case, detects electrochemical sensor generation simulating signal in the groove, through A/D converter; Digital signal is flowed to CPU, and digital signal is transported to display after CPU handles; And result is saved in data-carrier store or mobile USB flash disk, and, make the instruction of whether reporting to the police according to the Signal Processing result.In addition, the digital signal that CPU obtains through A/D converter according to the sensor die analog signal realizes the robotization of SPME and desorption.
Shown in accompanying drawing 2, the utility model comprises: SPME chamber 1, desorption chamber 2, gas automatic sampling device 3, air pump 4, heating radiator 5, detection case 6, gas discharge outlet 7, audible-visual annunciator 8, peripheral hardware power supply slot 9, power supply 10, collection box 11, data processing centre (DPC) 12 etc.
Shown in accompanying drawing 3, Fig. 4, SPME chamber 1 all is positioned on the pallet 27 with desorption chamber 2, and motion pallet 27 is realized moving up and down through motor by cpu instruction control.Micro-extraction chamber 1 left end is provided with gas sampling mouth 14, and right-hand member is provided with gas discharge outlet 7; Desorption chamber 2 upper ends are provided with filling opening 21, and the lower end is provided with desorption liquid escape hole 23, and desorption liquid escape hole 23 links to each other with detection case 6.Be provided with sensor in SPME chamber 1 and the desorption chamber 2, CPU makes corresponding extraction, desorption instruction through the variation of resistance of sensor.
Shown in accompanying drawing 5, be provided with formaldehyde in the detection case 6 and detect groove 25, benzene detection groove 24, ammonia detection groove 26, corresponding electrochemical sensor is housed respectively in the respective detection groove.All there is a waste liquid flow export 28 lower end of detecting groove, links to each other with collection box 11.
Claims (1)
1. IAQ detector; Its technical characterictic is: it comprises SPME chamber (1), desorption chamber (2), motion pallet (27), detection case (6), data processor (12), audible-visual annunciator (8); Be provided with extraction formaldehyde solid phase micro-extracting head (13), benzene extraction solid phase micro-extracting head (15), (16) three kinds of extracting head of extraction of ammonia solid phase micro-extracting head in the SPME chamber (1); Be provided with formaldehyde desorption tank (20), benzene desorption tank (19), (22) three kinds of desorption tank of ammonia desorption tank in the desorption chamber (2); Be provided with formaldehyde in the detection case (6) and detect groove (25), benzene detection groove (24), ammonia detection groove (26), detect in the groove formaldehyde electrochemical sensor, benzene electrochemical sensor, ammonia electrochemical sensor are housed respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204835064U CN202362264U (en) | 2011-11-29 | 2011-11-29 | Indoor air quality detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204835064U CN202362264U (en) | 2011-11-29 | 2011-11-29 | Indoor air quality detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362264U true CN202362264U (en) | 2012-08-01 |
Family
ID=46573442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204835064U Expired - Fee Related CN202362264U (en) | 2011-11-29 | 2011-11-29 | Indoor air quality detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237327A (en) * | 2014-08-07 | 2014-12-24 | 富军 | Device and method for detecting in-vehicle air quality |
-
2011
- 2011-11-29 CN CN2011204835064U patent/CN202362264U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237327A (en) * | 2014-08-07 | 2014-12-24 | 富军 | Device and method for detecting in-vehicle air quality |
| CN104237327B (en) * | 2014-08-07 | 2016-05-18 | 富军 | In-car air quality checkout gear and detection method |
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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: 20120801 Termination date: 20121129 |