CN106053311A - Dust sensor - Google Patents
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- CN106053311A CN106053311A CN201610674439.1A CN201610674439A CN106053311A CN 106053311 A CN106053311 A CN 106053311A CN 201610674439 A CN201610674439 A CN 201610674439A CN 106053311 A CN106053311 A CN 106053311A
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- 239000000428 dust Substances 0.000 title claims abstract description 95
- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 230000005532 trapping Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000012360 testing method Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to the field of dust detection, and discloses a dust detection sensor. The dust sensor includes an air duct, a light emission module, a photosensitive element and a processing element; air steam with to-be-tested dust content circulates in the air duct; the light emission module includes a light emitting tube for emitting light to illuminate the air steam circulating in the air duct and a lens component located at an optical path of the light and used for converging the light emitted by the light emitting tube; the photosensitive element is located in the air duct and is used for receiving scattered light generated after the light irradiates dust; the processing element is used for determining the dust content based on the scattered light, wherein a detection distance between the photosensitive element and a light-converging lens of the lens module makes the resolution ratio of the dust sensor highest. The influence of the detection distance between the photosensitive element and the light-converging lens on the resolution ratio of the dust sensor is taken into account, and the resolution ratio of the dust sensor is improved by setting the detection distance.
Description
Technical field
The present invention relates to dust detection field, in particular it relates to a kind of dust detection sensor.
Background technology
Dust sensor utilizes MIE scattering theory to count particle in air or mass concentration is measured
Mode.Generally, dust sensor has an air channel, light-emitting tube, lens and a photo-sensitive cell.Air stream is in air channel
Middle flowing, is irradiated by laser when air stream flows through above photo-sensitive cell and produces scattered light, and photo-sensitive cell receives scattered light, logical
Cross the analysis to scattered light and obtain the situation of dust in air stream.
In the prior art, the photo-sensitive cell of dust sensor is positioned at the lower section of test point, and the position of test point is usual
It is arranged at gas to flow freely over above test point, but in prior art, the determination of test point, i.e. photo-sensitive cell and converged light
The setting of the detecting distance between lens is often unable to reach the highest resolution of dust sensor.
Summary of the invention
It is an object of the invention to provide a kind of dust sensor, this dust sensor considers photo-sensitive cell and converged light
The impact on the resolution of dust sensor of the detecting distance between lens, improves dust by arranging described detecting distance
The resolution of sensor.
To achieve these goals, the present invention provides a kind of dust sensor, and described dust sensor includes: air channel, treats
The air stream surveying dust content circulates in air channel；Light emission component, including: light-emitting tube, it is used for launching light described to irradiate
The air stream of circulation in air channel, and lens subassembly, be positioned in the light path of described light, for converging what described light-emitting tube was launched
Light；Photo-sensitive cell, is positioned in described air channel, for receiving the scattered light produced after described light irradiates dust；And treatment element,
Determine dust content based on described scattered light, wherein, described photo-sensitive cell and described lens subassembly converge the lens of described light
Detecting distance make the resolution of described dust sensor the highest.
Preferably, described lens subassembly includes lens.
Preferably, the power at described light-emitting tube is positioned in the range of 2.2mw to 2.8mw and described lens a diameter of
In the case of 6mm, described detecting distance is 12mm；And the scope of 3.2mw to 3.8mw it is positioned at the power of described light-emitting tube
In and a diameter of 6mm of described lens in the case of, described detecting distance is 15mm.
Preferably, described lens subassembly includes: the first lens, states, described in converging, the light that light-emitting tube is launched；Second
Lens, between described light-emitting tube and described first lens, for making light that described light-emitting tube launches and described the
The optical axis of one lens is parallel.
Preferably, in the case of the power of described light-emitting tube is positioned in the range of 2.2mw to 2.8mw, described detection
The focal length of distance and described first lens is 8mm；And the scope of 3.2mw to 3.8mw it is positioned at the power of described light-emitting tube
In the case of Nei, the focal length of described detecting distance and described first lens is 12mm.
Preferably, described dust sensor also includes: main cavity, described air channel, described light emission component, described photosensitive unit
Part and described treatment element are positioned in main chamber body, and the antetheca of wherein said main cavity is provided with air intake, main chamber
It is provided with gas outlet on the rear wall of body.
Preferably, described dust sensor also includes: air extractor, is positioned at described gas outlet, for by described air
Flow from the introducing of described air intake, flow out from gas outlet through described air channel.
Preferably, main chamber body is provided with light trapping, for absorbing the light that described light-emitting tube is launched, described lens
Assembly is between described light trapping and described light-emitting tube.
Preferably, described dust sensor also includes critesistor, for detecting the temperature of dust place to be measured environment.
Preferably, described light emission component also includes: preposition diaphragm and rearmounted diaphragm, launches along described light-emitting tube
The path direction of light, described rearmounted diaphragm is positioned at the downstream of first lens in described lens subassembly, and described preposition diaphragm is positioned at
Described preposition diaphragm and described lens subassembly converge the downstream of the lens of described light.
By technique scheme, the inspection of the lens converging described light in described photo-sensitive cell and described lens subassembly is set
Range finding is from so that the resolution of described dust sensor is the highest.Thus by considering between photo-sensitive cell and the lens of converged light
The detecting distance impact on the resolution of dust sensor, improve dust sensor by arranging described detecting distance
Resolution.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 is the overview diagram of the dust sensor provided according to one embodiment of the present invention；
Fig. 2 is the top view of the main cavity of the dust sensor according to one embodiment of the present invention offer；
Fig. 3 is the diagram of air-vent on the air channel of the dust sensor according to one embodiment of the present invention offer；
Fig. 4 is the assembling diagram of the dust sensor provided according to one embodiment of the present invention；
Fig. 5 is the assembling diagram of Laser emission assembly and the circuit board provided according to one embodiment of the present invention；
Fig. 6 is the schematic diagram of the air flow direction through photo-sensitive cell provided according to one embodiment of the present invention；
Fig. 7 is the diagram of the main cavity upper cover provided according to one embodiment of the present invention；
Fig. 8 is the schematic diagram of the metal shell of the dust sensor according to one embodiment of the present invention offer；
Fig. 9 a to 9c is the topology view of the Laser emission assembly provided according to one embodiment of the present invention；
Figure 10 is the Laser emission assembly that the lens subassembly provided according to one embodiment of the present invention includes lens
Schematic diagram；
Figure 11 is that the lens subassembly provided according to one embodiment of the present invention includes cuing open of the emitting module of lens
Face view；
Figure 12 is the Laser emission group that the lens subassembly provided according to one embodiment of the present invention includes two lens
The schematic diagram of part；And
Figure 13 is that the lens subassembly provided according to one embodiment of the present invention includes cuing open of the emitting module of two lens
Face view.
Description of reference numerals
1 dust sensor 2 main cavity
3 fan 4 fan installation sites
5 rear wall 6 Laser emission assembly mounting grooves
8 link slot 10 air channels
11 photo-sensitive cell 12 light trappings
13 antetheca 15 air intakes
16 critesistor 17 air inlets
18 upper cover 20 baffle plates
21 circuit board 22 air-vents
The 26 preposition diaphragms of metal shell 27
The 28 rearmounted diaphragms in detection hole 29
30 LASER Discharge Tube 31 LASER Discharge Tube mounting grooves
35 Laser emission assembly 36,37,38 lens
40 test points
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that this place is retouched
The detailed description of the invention stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Referring to figs. 1 to Fig. 5, the present invention provides a kind of dust sensor 1 to may include that air channel 10, dust content to be measured
Air stream circulate in air channel 10；Light emission component (Laser emission assembly 35 as depicted), including: light-emitting tube (as
LASER Discharge Tube 30 shown in figure), for launching light to irradiate the air stream of circulation in described air channel 10, and lens subassembly, position
In the light path of described light, for converging the light that described light-emitting tube is launched；Photo-sensitive cell 11, is positioned in described air channel 10, uses
In receiving the scattered light produced after described light irradiates dust；And treatment element, determine dust content based on described scattered light, its
In, the detecting distance of the lens converging described light in described photo-sensitive cell 11 and described lens subassembly makes described dust sensor
The resolution of 1 is the highest.Thus by the detecting distance considered between photo-sensitive cell and the lens of converged light to dust sensor
The impact of resolution, improves the resolution of dust sensor by arranging described detecting distance.
Wherein, light-emitting tube can be such as but be not limited to LASER Discharge Tube, infrared transmitting tube, hereinafter will send out with laser
As a example by penetrating pipe 30, the present invention is described.Treatment element can be designed as the form of circuit board 21 as shown in Figure 3, Laser emission group
Part 35, photo-sensitive cell 11 are connected with circuit board 21, and Fig. 5 gives Laser emission assembly and the dress of circuit board in a kind of embodiment
Figure shows.
As shown in Figures 2 to 4, described dust sensor 1 can also include: main cavity 2, and described air channel 10, described light are sent out
Penetrate assembly 35, described photo-sensitive cell 11 and described treatment element (circuit board 21 as shown in the figure) to be positioned in main chamber body 2, wherein
It is provided with air intake 15 on the antetheca 13 of main chamber body 2, the rear wall 5 of main chamber body 2 is provided with gas outlet.So that it is to be measured
The air stream of environment enters air channel 10 by air intake 15 and then flows out from gas outlet, to realize detecting dust.Wherein air channel
10 are connected between air intake 15 and gas outlet.
As it can be seen, main chamber body 2 can be provided with light trapping 12, for absorbing what described light-emitting tube was launched
Light, described lens subassembly is between described light trapping 12 and described light-emitting tube.Photo-sensitive cell 11 is placed in air channel 10, laser
The laser that emitting module 35 sends can be parallel with photo-sensitive cell 11.The laser launched can just going up through photo-sensitive cell 11
Side, is irradiated in the light trapping 12 in main cavity 2, and light trapping 12 absorbs the laser injected, to reduce the noise of reflection light.Described
Light trapping 12 can use light absorbent to make, or non-light absorbent carries out sub-optical processing.
Owing to temperature can affect detected result, thus in order to improve the accuracy of dust sensor, described dust passes
Sensor can also include critesistor 16, for detecting the temperature of dust place to be measured environment.In order to critesistor is detected
Temperature more accurately reflects that ambient temperature, described critesistor can be installed on below circuit board 21, is positioned at the wind of main cavity 2
Among road, for dust sensor output result being modified according to ambient temperature.
In order to draw the circulation of airflow guiding, described dust sensor can also include: air extractor, is positioned at described gas outlet
Place, flows out from gas outlet for being introduced from described air intake by described air stream, through described air channel.Take out described in as in figure 2 it is shown,
Device of air can be fan 3.Fan 3 is arranged on the rear wall 5 of main cavity 2 by fan mounting groove 4, the wherein position of fan 3
It can be position, gas outlet.
Fan 3 can form negative pressure in the way of utilization is bled and air stream is introduced from described air intake 15, through described
Air channel 10 is flowed out from gas outlet, as in figure 2 it is shown, described air stream flows according to the air flow direction shown in arrow.Wherein flow through sense
Optical element 11, Laser emission assembly 35 is arranged in main cavity 2 by Laser emission assembly mounting groove 6, so that Laser emission
The laser that pipe 30 is launched can converge in the top of photo-sensitive cell 11, in order to photo-sensitive cell 11 accepts the scattering through dust scattering
Light.Air channel 10 can be L-shaped, and the middle angle in described L-shaped air channel 10 can be obtuse angle, and such light will not shine from fan 3
It is mapped on photo-sensitive cell 11, affects accuracy of detection.The afterbody in described air channel 10 opens air-vent 27, so that air stream is from air-vent 27
Flowing out, air-vent 27 can be as shown in Figure 3.
As shown in Figure 4, main cavity 2 can include upper cover 18 and main body 25, and wherein air intake 15 may be located on upper cover 18
Or in main body 25.Air stream enters main cavity 2 from blowhole 15, may then pass through the air inlet 17 on circuit board 21 and then wind
Road 10, Fig. 6 shows the air flow direction of the air stream by photo-sensitive cell 11.
As it is shown in fig. 7, upper cover 18 can include baffle plate 20, after air stream is stopped by baffle plate 20, by circuit board 21
Air inlet 17 enters in main cavity 2.Big dust particle and foreign material can be stopped by baffle plate 20, it is to avoid to specific in air stream
The detection of granule (such as PM2.5).
It addition, as shown in Figure 8, main cavity 2 can be wrapped up by metal shell 26, and metal shell 26 is used by link slot 8
Conductive material is connected with the GND of circuit board 21, in order to shielding interference, improves the stability of sensor.In one embodiment,
Connecting material can be metal spring, assembles metal spring in link slot 8, and spring one end connects circuit board 21, and the other end connects
Metal shell 20.
Below with reference to Fig. 9 a to Fig. 9 c, Laser emission assembly 35 is described.LASER Discharge Tube 30 is arranged on laser as shown in the figure
On transmitting tube mounting groove 31；Laser emission assembly 35 has louvre on the wall of LASER Discharge Tube 30, to avoid temperature pair
LASER Discharge Tube 30 power produces impact.Being provided with detection hole 28 on Laser emission assembly 35, it is right that photo-sensitive cell 11 can be installed
Should be positioned on circuit board 21 in the lower section in detection hole 28.
Wherein, described lens subassembly can include lens or two lens, in the case of including two lens, the
One lens, state, described in converging, the light that light-emitting tube is launched；Second lens, are positioned at described light-emitting tube and described first lens
Between, parallel with the optical axis of described first lens for the light making described light-emitting tube launch.
Described light emission component 35 can also include: preposition diaphragm 27 and rearmounted diaphragm 29, to prevent luminous reflectance.Along institute
Stating the path direction of light that light-emitting tube is launched, described rearmounted diaphragm 29 is positioned in described lens subassembly 35 under first lens
Trip, described preposition diaphragm is positioned at the downstream of the lens converging described light in described preposition diaphragm and described lens subassembly.
Introduce in the case of lens subassembly includes lens below with reference to Figure 10 and Figure 11 by detailed description of the invention
The determination of detecting distance.
In figure, test point 40 is for laser by the point converged after lens 36, and photo-sensitive cell 11 is positioned at below test point 40, sense
The detecting distance L of optical element 11 and lens 36 and the distance of test point 40 to lens 36.For the Laser emission with certain power
Pipe 30, for same lens, if LASER Discharge Tube 30 is in diverse location, the test point 40 of lens 36 converged light also can change
Become.In the case of lens subassembly includes lens, along the path direction of laser, preposition diaphragm 27 and rearmounted diaphragm 29
Downstream in lens 36.
In practice process, inventor finds, in the case of lens, test point 40 is different, dust sensor 1
Resolution is the most different.Therefore, obtained by following experiment: the power at described light-emitting tube is positioned at the scope of 2.2mw to 2.8mw
In and a diameter of 6mm of described lens in the case of, when described detecting distance L is 12mm, dust sensor resolution is the highest；With
And be positioned in the range of 3.2mw to 3.8mw and in the case of a diameter of 6mm of described lens at the power of described light-emitting tube,
When described detecting distance L is 15mm, dust sensor resolution is the highest.Certainly, those skilled in the art can be according to different light
The power of transmitting tube and the diameter of lens determine suitable detecting distance L.
Detecting distance L is changed, under the different detecting distance of record by the distance changing LASER Discharge Tube 30 and lens 36
The testing result of dust sensor, by testing result acquisition error amount compared with the detected value of reference instrument, then by difference
The error amount of detecting distance L compares, and detecting distance L corresponding to error amount minimum is so that dust sensor 1 reaches
High-resolution value.
Table 1 to table 4 gives the power of LASER Discharge Tube and is positioned in the range of 2.2mw to 2.8mw and described lens straight
The error of dust sensor when footpath is different detecting distance L in the case of 6mm.
Table 1
Table 2
Table 3
Table 4
Can be drawn by table 1 to table 4, the power in LASER Discharge Tube 30 is positioned in the range of 2.2mw to 2.8mw and thoroughly
In the case of a diameter of 6mm of mirror 36, when described detecting distance L is 12mm, the resolution of dust sensor is the highest.In above-mentioned reality
650 wave band of laser transmitting tubes can be used in testing, be certainly not limited to this wave band.
Table 5 to table 8 gives the power of LASER Discharge Tube and is positioned in the range of 3.2mw to 3.8mw and described lens straight
The error of dust sensor when footpath is different detecting distance L in the case of 6mm.
Table 5
Table 6
Table 7
Table 8
Can be drawn by table 1 to table 4, the power in LASER Discharge Tube 30 is positioned in the range of 3.2mw to 3.8mw and thoroughly
In the case of a diameter of 6mm of mirror 36, when described detecting distance L is 15mm, the resolution of dust sensor is the highest.
Introduce in the case of lens subassembly includes two lens below with reference to Figure 12 and Figure 13 by detailed description of the invention
The determination of detecting distance.
As shown in Figure 12 and Figure 13, the light that lens 38 collimation laser transmitting tube 30 is launched so that it is be parallel to lens 37, lens
Directional light is converged to test point 40 (i.e. the focus of lens 37) by 37, the detecting distance L of photo-sensitive cell 11 and lens 37 and detection
The distance (i.e. the focal length of lens 37) of point 40 to lens 37.For the LASER Discharge Tube 30 with certain power, different convergences is saturating
Mirror (has different focal), and the test point 40 of convergence also can be different.In the case of lens subassembly includes two lens, along swashing
The path direction of light, is lens 38, rearmounted diaphragm 29, lens 37, preposition diaphragm 27 successively.
In practice process, inventor finds, in the case of two lens, test point 40 is different, dust sensor 1
Resolution is the most different.Therefore, obtained by following experiment: the power at described light-emitting tube is positioned at the scope of 2.2mw to 2.8mw
In the case of Nei, when described detecting distance L is 8mm, dust sensor resolution is the highest；And the power at described light-emitting tube
In the case of being positioned in the range of 3.2mw to 3.8mw, when described detecting distance L is 12mm, dust sensor resolution is the highest.When
So, those skilled in the art can determine suitable detecting distance L according to the power of different light-emitting tubes.
Detecting distance L is changed, under the different detecting distance of record by changing lens 36 (i.e. changing the focal length of lens 36)
The testing result of dust sensor, by testing result acquisition error amount compared with the detected value of reference instrument, then by difference
The error amount of detecting distance L compares, and detecting distance L corresponding to error amount minimum is so that dust sensor 1 reaches
High-resolution value, focal length is that the lens of this detecting distance L are then for enabling to dust sensor resolution under this power condition
Rate reaches the highest lens.
Table 9 to table 12 gives different inspections in the case of the power of LASER Discharge Tube is positioned in the range of 2.2mw to 2.8mw
Range finding error of dust sensor when L (there are the lens 37 of different focal).
Table 9
Table 10
Table 11
Table 12
Can be drawn by table 9 to table 12, the power in LASER Discharge Tube 30 is positioned in the range of 2.2mw to 2.8mw
In the case of, when described detecting distance L is 8mm (i.e. using focal length is that the lens of 8mm are as lens 37), the resolution of dust sensor
Rate is the highest.
Table 13 to table 16 gives in the case of the power of LASER Discharge Tube is positioned in the range of 3.2mw to 3.8mw different
The error of dust sensor during detecting distance L (there are the lens 37 of different focal).
Table 13
Table 14
Table 15
Table 16
Can be drawn by table 13 to table 16, the power in LASER Discharge Tube 30 is positioned in the range of 3.2mw to 3.8mw
In the case of, when described detecting distance L is 12mm (i.e. using focal length is that the lens of 12mm are as lens 37), dividing of dust sensor
Resolution is the highest.
It should be noted that the present invention is not limited to the power of above-mentioned LASER Discharge Tube, thus be also not necessarily limited to above-mentioned detection away from
From L.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a dust sensor, it is characterised in that described dust sensor includes:
Air channel, the air stream of dust content to be measured circulates in air channel；
Light emission component, including:
Light-emitting tube, for launching light to irradiate the air stream of circulation in described air channel, and
Lens subassembly, is positioned in the light path of described light, for converging the light that described light-emitting tube is launched；
Photo-sensitive cell, is positioned in described air channel, for receiving the scattered light produced after described light irradiates dust；And
Treatment element, determines dust content based on described scattered light,
Wherein, the detecting distance of the lens converging described light in described photo-sensitive cell and described lens subassembly makes described dust pass
The resolution of sensor is the highest.
Dust sensor the most according to claim 1, it is characterised in that described lens subassembly includes lens.
Dust sensor the most according to claim 2, it is characterised in that
Power at described light-emitting tube is positioned in the range of 2.2mw to 2.8mw and the situation of a diameter of 6mm of described lens
Under, described detecting distance is 12mm；And
Power at described light-emitting tube is positioned in the range of 3.2mw to 3.8mw and the situation of a diameter of 6mm of described lens
Under, described detecting distance is 15mm.
Dust sensor the most according to claim 1, it is characterised in that described lens subassembly includes:
First lens, state, described in converging, the light that light-emitting tube is launched；
Second lens, between described light-emitting tube and described first lens, for the light making described light-emitting tube launch
Parallel with the optical axis of described first lens.
Dust sensor the most according to claim 4, it is characterised in that
In the case of the power of described light-emitting tube is positioned in the range of 2.2mw to 2.8mw, described detecting distance and described
The focal length of one lens is 8mm；And
In the case of the power of described light-emitting tube is positioned in the range of 3.2mw to 3.8mw, described detecting distance and described
The focal length of one lens is 12mm.
Dust sensor the most according to claim 1, it is characterised in that described dust sensor also includes: main cavity, institute
State air channel, described light emission component, described photo-sensitive cell and described treatment element to be positioned in main chamber body,
It is provided with air intake on the antetheca of wherein said main cavity, the rear wall of main chamber body is provided with gas outlet.
Dust sensor the most according to claim 6, it is characterised in that described dust sensor also includes: air extractor,
It is positioned at described gas outlet, flows out from gas outlet for described air stream is introduced from described air intake, through described air channel.
Dust sensor the most according to claim 1, it is characterised in that be provided with light trapping in main chamber body, be used for
Absorbing the light that described light-emitting tube is launched, described lens subassembly is between described light trapping and described light-emitting tube.
Dust sensor the most according to claim 1, it is characterised in that described dust sensor also includes critesistor,
For detecting the temperature of dust place to be measured environment.
10. according to the dust sensor according to any one of claim 1-9, it is characterised in that described light emission component also wraps
Including: preposition diaphragm and rearmounted diaphragm, along the path direction of the light that described light-emitting tube is launched, described rearmounted diaphragm is positioned at described
The downstream of first lens in lens subassembly, described preposition diaphragm is positioned in described preposition diaphragm and described lens subassembly convergence institute
State the downstream of the lens of light.
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|---|---|---|---|
| CN201610674439.1A CN106053311B (en) | 2016-08-16 | 2016-08-16 | A kind of dust sensor |
| PCT/CN2017/082953 WO2018032802A1 (en) | 2016-08-16 | 2017-05-03 | Dust sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610674439.1A CN106053311B (en) | 2016-08-16 | 2016-08-16 | A kind of dust sensor |
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| CN106053311A true CN106053311A (en) | 2016-10-26 |
| CN106053311B CN106053311B (en) | 2019-04-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872326A (en) * | 2017-04-12 | 2017-06-20 | 广东美的制冷设备有限公司 | The automatic zero-setting method of dust sensor |
| WO2018032802A1 (en) * | 2016-08-16 | 2018-02-22 | 广东美的制冷设备有限公司 | Dust sensor |
| CN108398364A (en) * | 2017-01-10 | 2018-08-14 | 现代自动车株式会社 | Dust sensor with flow control function |
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