CN205786221U - A kind of PM2.5 detects device - Google Patents
A kind of PM2.5 detects device Download PDFInfo
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- CN205786221U CN205786221U CN201620713186.XU CN201620713186U CN205786221U CN 205786221 U CN205786221 U CN 205786221U CN 201620713186 U CN201620713186 U CN 201620713186U CN 205786221 U CN205786221 U CN 205786221U
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- light scattering
- scattering sensor
- heating unit
- electric heating
- detects device
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Abstract
This utility model embodiment discloses a kind of PM2.5 and detects device, solve current light scattering sensor carry out in malaria PM2.5 detection time, during due to the globule in air less than 2.5 microns, the erroneous judgement of light scattering sensor can be caused, and the technical problem that the accuracy of detection that causes is low.This utility model embodiment includes: housing, light scattering sensor and electric heating unit；Light scattering sensor is arranged on enclosure interior, and has air inlet；Electric heating unit it is provided with between shell air inlet and the air inlet of light scattering sensor.
Description
Technical field
This utility model relates to Detection of Air Quality technical field, particularly relates to a kind of PM2.5 and detects device.
Background technology
PM2.5 Detection of Air Quality refers to be exclusively used in PM2.5 (can enter lung particulate matter) numerical value in measurement air.It is applicable to public
The mensuration of site surrounding, atmospheric environment and room air, it may also be used for the evaluation analysis of air purifier purification efficiency.
Current PM2.5 Detection of Air Quality method detects typically by PM2.5 sensor, aforesaid PM2.5
Sensor is based on light scattering sensor, develops according to scattering of light principle, microgranule and molecule meeting under the irradiation of light
Produce scattering of light phenomenon, meanwhile, also absorb the energy of partial illumination light.When a branch of collimated monochromatic ligth incides tested
During grain field, can be affected by scattering around granule and absorbing, light good general be attenuated.The most just can try to achieve incident illumination to pass through
The relative attenuation rate of concentration field to be measured.And the size of relative attenuation rate substantially can linear response field to be measured dust the denseest
Degree.The size of light intensity and being directly proportional through the signal of telecommunication power of opto-electronic conversion, just can be in the hope of relative attenuation by recording the signal of telecommunication
Rate, and then just can measure the concentration of dust in field to be measured.
PM2.5 sensor based on light heat sensor currently mainly includes infrared principles dust sensor and laser
Sensor.
Structure and the circuit of infrared principles dust sensor are fairly simple.Its light source is infrared LED light source, air-flow air inlet/outlet
Mouth to obtain thermal current flowing mainly by resistance heating, has granule to pass through i.e. and exports high level.
Structure and the circuit of laser sensor are relative complex.Its light source is laser diode.Sampled air by fan or
Aerator promotes, and by the air channel of somewhat complex design, detects.When the fine particle in air enters laser beam region
Time, laser will be made to scatter；Scattered light has radiation in 360 ° of space, and we in position place photodetector, make
Only receive scattered light, be then passed through photodetector photoelectric effect produce current signal, through circuit amplify and process after, i.e.
Available fine particle concentration value.
But above-mentioned light scattering sensor carry out in malaria PM2.5 detection time, due to the globule in air
During less than 2.5 microns, the erroneous judgement of light scattering sensor can be caused, thus result in the technical problem that accuracy of detection is low.
Utility model content
A kind of PM2.5 that this utility model embodiment provides detects device, solves current light scattering sensor at tide
When wet air carries out PM2.5 detection, during due to the globule in air less than 2.5 microns, light scattering sensor can be caused
Erroneous judgement, and the technical problem that the accuracy of detection that causes is low.
A kind of PM2.5 that this utility model embodiment provides detects device, including:
Housing, light scattering sensor and electric heating unit；
Described light scattering sensor is arranged on described enclosure interior, and has air inlet；
Described electric heating unit it is provided with between the air inlet of described shell air inlet and described light scattering sensor.
Preferably, described enclosure interior has base, and described light scattering sensor is installed on described base, described base
Having passage, described passage is corresponding with the air inlet of described light scattering sensor.
Preferably, described electric heating unit is arranged on the passage of described base.
Preferably, the area of described electric heating unit is more than or equal to the passage of described base.
Preferably, described electric heating unit is ptc heater.
Preferably, if having dry hole on described ptc heater, the aperture in described hole is not less than 2.5 microns.
Preferably, the bottom of described housing has base plate, and described base plate surrounding has several air inlets.
Preferably, there is in described housing main circuit board, and be placed in the display screen of case top, described main circuit board with
Described light scattering sensor and described display screen are electrically connected with.
Preferably, described PM2.5 detection device also includes the battery being placed in housing.
Preferably, described PM2.5 detection device also includes:
Secondary circuit board, movable plug is connected to, at described enclosure interior draw-in groove, add with described light scattering sensor, described electricity
Hot cell and described battery are electrically connected with.
As can be seen from the above technical solutions, this utility model embodiment has the advantage that
A kind of PM2.5 that this utility model embodiment provides detects device, including: housing, light scattering sensor and electricity add
Hot cell；Light scattering sensor is arranged on enclosure interior, and has air inlet；In entering of shell air inlet and light scattering sensor
Electric heating unit it is provided with between QI KOU.In the present embodiment, by shell air inlet and light scattering sensor air inlet it
Between be provided with electric heating unit, it is achieved that when malaria enters before light scattering sensor, carried out by electric heating unit
Heating, makes the moist part in malaria or evaporates completely, solving current light scattering sensor at malaria
In carry out PM2.5 detection time, due to the globule in air less than 2.5 microns time, the erroneous judgement of light scattering sensor can be caused, and lead
The low technical problem of accuracy of detection caused.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of one embodiment of a kind of PM2.5 detection device that Fig. 1 provides for this utility model embodiment.
Detailed description of the invention
A kind of PM2.5 that this utility model embodiment provides detects device, solves current light scattering sensor at tide
When wet air carries out PM2.5 detection, during due to the globule in air less than 2.5 microns, light scattering sensor can be caused
Erroneous judgement, and the technical problem that the accuracy of detection that causes is low.
For making utility model purpose of the present utility model, feature, the advantage can be the most obvious and understandable, below will knot
Close the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment be clearly and completely described,
Obviously, the embodiments described below are only a part of embodiment of this utility model, and not all embodiment.Based on this reality
By the embodiment in novel, those of ordinary skill in the art obtained under not making creative work premise all other
Embodiment, broadly falls into the scope of this utility model protection.
Referring to Fig. 1, an embodiment of a kind of PM2.5 detection device that this utility model embodiment provides includes:
Housing 1, light scattering sensor 2 and electric heating unit；
It is internal that light scattering sensor 2 is arranged on housing 1, and has air inlet 21；
It is provided with electric heating unit between the air inlet 21 of shell air inlet and light scattering sensor 2.
Further, enclosure interior has base 12, and light scattering sensor is installed on base 2, and base 12 has ventilation
Hole 11, passage 11 is corresponding with the air inlet 21 of light scattering sensor.
Further, electric heating unit is arranged on the passage 11 of base 12.
Further, the area of electric heating unit is more than or equal to the passage 11 of base 12.
Further, electric heating unit is ptc heater 3.
Further, if having dry hole on ptc heater 3, the aperture in hole is not less than 2.5 microns.
Further, the bottom of housing 1 has base plate 13, and base plate 13 surrounding has several air inlets 131.
Further, there is in housing 1 main circuit board 4, and be placed in the display screen 8 at housing 1 top, main circuit board 4 with
Light scattering sensor 2 and display screen 8 are electrically connected with.
Further, PM2.5 detection device also includes the battery 6 being placed in housing 1.
Further, PM2.5 detection device also includes:
Secondary circuit board 5, movable plug is connected at the internal draw-in groove of housing 1, with light scattering sensor 2, electric heating unit with
And battery 6 is electrically connected with.
PM2.5 detection device in the present embodiment also includes lithium battery 6, sets between main circuit board 4 and touch display screen 8
It is equipped with top upper cover 7, bottom base plate 13, is provided with outlet, base 12 and base plate 13 is screwed connection, base 12
For being entrapped at the aluminum shell of housing 1.
It is understood that pass through base plate 13 end when the fan within light scattering sensor 2 rotates from by outside air
Portion's surrounding is provided with air inlet 131 and sucks, if during the dry hole of the ptc heater 3 at the outer through being embedded in housing vent hole 11,
The steam heating evaporation that the heat of ptc heater 3 will carry in outside air, light scattering sensor 2 gets heating again and steams
Send out the air after steam, measured.
A kind of PM2.5 that this utility model embodiment provides detects device, including: housing 1, light scattering sensor 2 and electricity
Heating unit；It is internal that light scattering sensor 2 is arranged on housing 1, and has air inlet 21；Sense with light scattering in shell air inlet
It is provided with electric heating unit between the air inlet 21 of device 2.In the present embodiment, by shell air inlet and light scattering sensor 2
Air inlet 21 between be provided with electric heating unit, it is achieved that when malaria enters before light scattering sensor, by electricity
Heating unit heats, and makes the moist part in malaria or evaporates completely, solving current light scattering sensor
When carrying out PM2.5 detection in malaria, during due to the globule in air less than 2.5 microns, light scattering can be caused to sense
The erroneous judgement of device, and the technical problem that the accuracy of detection that causes is low.
The above, above example only in order to the technical solution of the utility model to be described, is not intended to limit；Although ginseng
According to previous embodiment, this utility model is described in detail, it will be understood by those within the art that: it is still
Technical scheme described in foregoing embodiments can be modified, or wherein portion of techniques feature is carried out equivalent replace
Change；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this utility model each embodiment technical scheme
Spirit and scope.
Claims (10)
1. a PM2.5 detects device, it is characterised in that including:
Housing, light scattering sensor and electric heating unit；
Described light scattering sensor is arranged on described enclosure interior, and has air inlet；
Described electric heating unit it is provided with between the air inlet of described shell air inlet and described light scattering sensor.
PM2.5 the most according to claim 1 detects device, it is characterised in that described enclosure interior has base, described light
Scattering sensor is installed on described base, and described base has passage, described passage and described light scattering sensor
Air inlet is corresponding.
PM2.5 the most according to claim 2 detects device, it is characterised in that described electric heating unit is arranged at the described end
On the passage of seat.
PM2.5 the most according to claim 3 detects device, it is characterised in that the area of described electric heating unit more than or
Passage equal to described base.
PM2.5 the most as claimed in any of claims 1 to 4 detects device, it is characterised in that described electric heating unit
For ptc heater.
PM2.5 the most according to claim 5 detects device, it is characterised in that if having dry hole on described ptc heater,
The aperture in described hole is not less than 2.5 microns.
PM2.5 the most according to claim 1 detects device, it is characterised in that the bottom of described housing has base plate, described
Base plate surrounding has several air inlets.
PM2.5 the most according to claim 1 detects device, it is characterised in that have main circuit board in described housing, and
Being placed in the display screen of case top, described main circuit board is electrically connected with described light scattering sensor and described display screen.
PM2.5 the most according to claim 1 detects device, it is characterised in that described PM2.5 detection device also includes being placed in
Battery in housing.
PM2.5 the most according to claim 9 detects device, it is characterised in that described PM2.5 detection device also includes:
Secondary circuit board, movable plug is connected at described enclosure interior draw-in groove, with described light scattering sensor, described electric heating unit
First and described battery is electrically connected with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620713186.XU CN205786221U (en) | 2016-07-06 | 2016-07-06 | A kind of PM2.5 detects device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620713186.XU CN205786221U (en) | 2016-07-06 | 2016-07-06 | A kind of PM2.5 detects device |
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| Publication Number | Publication Date |
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| CN205786221U true CN205786221U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620713186.XU Active CN205786221U (en) | 2016-07-06 | 2016-07-06 | A kind of PM2.5 detects device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066296A (en) * | 2016-07-06 | 2016-11-02 | 东莞市利发爱尔空气净化系统有限公司 | A kind of PM2.5 detects device |
| CN108426809A (en) * | 2018-02-28 | 2018-08-21 | 杭州电子科技大学 | One kind being based on the sidewise scattered round-the-clock PM2.5 concentration real-time detection apparatus of CCD |
-
2016
- 2016-07-06 CN CN201620713186.XU patent/CN205786221U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066296A (en) * | 2016-07-06 | 2016-11-02 | 东莞市利发爱尔空气净化系统有限公司 | A kind of PM2.5 detects device |
| WO2018006514A1 (en) * | 2016-07-06 | 2018-01-11 | 东莞市利发爱尔空气净化系统有限公司 | Pm2.5 measurement device |
| CN108426809A (en) * | 2018-02-28 | 2018-08-21 | 杭州电子科技大学 | One kind being based on the sidewise scattered round-the-clock PM2.5 concentration real-time detection apparatus of CCD |
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| GR01 | Patent grant |