CN205982006U - Dust sensor - Google Patents
Dust sensor Download PDFInfo
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- CN205982006U CN205982006U CN201620888257.XU CN201620888257U CN205982006U CN 205982006 U CN205982006 U CN 205982006U CN 201620888257 U CN201620888257 U CN 201620888257U CN 205982006 U CN205982006 U CN 205982006U
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- light
- lens
- dust sensor
- dust
- emitting tube
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- Optical Measuring Cells (AREA)
Abstract
The utility model relates to a dust detection field discloses a dust sensor, dust sensor includes: the wind channel, the air current of the dust content that awaits measuring circulates in the wind channel, the emission of light subassembly includes: photoemissive tube for transmission light is in order to shine the air current of circulation in the wind channel, and lens subassembly lie in in the light path of light, be used for assembling the light of photoemissive tube transmission, the photosensitive element is located in the wind channel, be used for receiving the scattered light that produces behind the light struck dust, and the treatment element, based on the dust content is confirmed to the scattered light, wherein, the photosensitive element with assemble in the lens subassembly the detection distance of the lens of light makes dust sensor's resolution ratio is the highest. So through the influence of the detection distance between the lens of considering photosensitive element and convergent light to dust sensor's resolution ratio, through setting up detection distance has improved dust sensor's resolution ratio.
Description
Technical field
This utility model is related to dust detection field, in particular it relates to a kind of dust sensor.
Background technology
Dust sensor is using MIE scattering theory, in the air particle to be counted or mass concentration measurement
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 subject to laser to irradiate and produces scattered light, photo-sensitive cell receives scattered light, leads to when air stream flows through above photo-sensitive cell
Cross the situation that the analysis to scattered light obtains dust in air stream.
In the prior art, the photo-sensitive cell of dust sensor is located 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, however 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.
Utility model content
The purpose of this utility model is to provide a kind of dust sensor, and this dust sensor considers photo-sensitive cell and convergence
The impact of the resolution to dust sensor for the detecting distance between the lens of light, is improve by arranging described detecting distance
The resolution of dust sensor.
To achieve these goals, this utility model provides a kind of dust sensor, and described dust sensor includes：Wind
Road, 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, in the light path of described light, for converging described light-emitting tube transmitting
Light；Photo-sensitive cell, in described air channel, for receiving the scattered light producing after described light irradiation dust；And processing elements
Part, determines dust content based on described scattered light, wherein, converges the saturating of described light in described photo-sensitive cell and described lens subassembly
The detecting distance of mirror makes the resolution highest of described dust sensor.
Preferably, described lens subassembly includes lens.
Preferably, described light-emitting tube power be located at 2.2mw to 2.8mw in the range of and described lens a diameter of
In the case of 6mm, described detecting distance is 12mm；And described light-emitting tube power be located at 3.2mw to 3.8mw scope
In the case of interior and a diameter of 6mm of described lens, described detecting distance is 15mm.
Preferably, described lens subassembly includes：First lens, for stating the light of light-emitting tube transmitting described in converging；Second
Lens, between described light-emitting tube and described first lens, for making the light of described light-emitting tube transmitting and described the
The optical axis of one lens is parallel.
Preferably, in the case that the power of described light-emitting tube is located in the range of 2.2mw to 2.8mw, described detection
The focal length of distance and described first lens is 8mm；And described light-emitting tube power be located at 3.2mw to 3.8mw scope
In the case of interior, 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 located 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, at described gas outlet, for by described air
Stream introduces, flows out from gas outlet through described air channel from described air intake.
Preferably, it is provided with light trapping in main chamber body, for absorbing the light of described light-emitting tube transmitting, described lens
Assembly is located 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, along the transmitting of described light-emitting tube
The path direction of light, described rearmounted diaphragm is located at the downstream of first lens in described lens subassembly, and described preposition diaphragm is located at
The downstream of the lens of described light is converged in described preposition diaphragm and described lens subassembly.
By technique scheme, the inspection of the lens converging described light in described photo-sensitive cell and described lens subassembly is set
Find range from so that the resolution highest of described dust sensor.Thus by between consideration photo-sensitive cell and the lens of converged light
The resolution to dust sensor for the detecting distance impact, improve dust sensor by arranging described detecting distance
Resolution.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide and further understands to of the present utility model, and constitutes a part for description, and following
Specific embodiment be used for together explaining this utility model, but do not constitute to restriction of the present utility model.In the accompanying drawings：
Fig. 1 is the overview diagram of the dust sensor being provided according to a kind of embodiment of this utility model；
Fig. 2 is the top view of the main cavity of the dust sensor being provided according to a kind of embodiment of this utility model；
Fig. 3 is the diagram of air-vent on the air channel of the dust sensor being provided according to a kind of embodiment of this utility model；
Fig. 4 is the assembling diagram of the dust sensor being provided according to a kind of embodiment of this utility model；
Fig. 5 is to be illustrated with the assembling of circuit board according to the Laser emission assembly that a kind of embodiment of this utility model provides；
Fig. 6 is the schematic diagram of the air flow direction through photo-sensitive cell being provided according to a kind of embodiment of this utility model；
Fig. 7 be according to a kind of embodiment of this utility model provide main cavity on lid diagram；
Fig. 8 is the schematic diagram of the metal shell of the dust sensor being provided according to a kind of embodiment of this utility model；
Fig. 9 a to 9c is the topology view of the Laser emission assembly being provided according to a kind of embodiment of this utility model；
Figure 10 is the Laser emission including lens according to the lens subassembly that a kind of embodiment of this utility model provides
The schematic diagram of assembly；
Figure 11 is the emitting module including lens according to the lens subassembly that a kind of embodiment of this utility model provides
Cross section view；
Figure 12 is to be sent out according to the laser that the lens subassembly that a kind of embodiment of this utility model provides includes two lens
Penetrate the schematic diagram of assembly；And
Figure 13 is the emitting module including two lens according to the lens subassembly that a kind of embodiment of this utility model provides
Cross section view.
Description of reference numerals
1 dust sensor 2 main cavity
3 fan 4 fan installation site
5 rear wall 6 Laser emission assembly mounting groove
8 link slot 10 air channel
11 photo-sensitive cell 12 light trapping
13 antetheca 15 air intake
16 critesistor 17 air inlet
20 baffle plates are covered on 18
21 circuit board 22 air-vent
The preposition diaphragm of 26 metal shell 27
The 28 rearmounted diaphragms in detection hole 29
30 LASER Discharge Tube 31 LASER Discharge Tube mounting groove
35 Laser emission assembly 36,37,38 lens
40 test points
Specific embodiment
Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains this utility model, is not limited to this utility model.
Referring to figs. 1 to Fig. 5, this utility model provides a kind of dust sensor 1 can include：Air channel 10, dust to be measured
The air stream of content circulates in air channel 10；Light emission component (Laser emission assembly 35 as depicted), including：Light-emitting tube
(LASER Discharge Tube 30 as depicted), for launching light irradiating in described air channel 10 air stream of circulation, and lens subassembly,
In the light path of described light, for converging the light of described light-emitting tube transmitting；Photo-sensitive cell 11, in described air channel 10,
For receiving the scattered light producing after described light irradiation dust；And treatment element, dust content is determined based on described scattered light,
Wherein, the detecting distance of the lens converging described light in described photo-sensitive cell 11 and described lens subassembly makes described dust sensing
The resolution highest of device 1.Thus by the detecting distance considering between photo-sensitive cell and the lens of converged light to dust sensor
Resolution impact, improve the resolution of dust sensor by arranging described detecting distance.
Wherein, light-emitting tube can be for example but be not limited to LASER Discharge Tube, infrared transmitting tube, hereinafter will be sent out with laser
Penetrate to describe this utility model as a example pipe 30.Treatment element can be designed as the form of circuit board 21 as shown in Figure 3, and laser is sent out
Penetrate assembly 35, photo-sensitive cell 11 is connected with circuit board 21, Fig. 5 gives Laser emission assembly and circuit board in a kind of embodiment
Assembling diagram.
As shown in Figures 2 to 4, described dust sensor 1 can also include：Main cavity 2, 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 located in main chamber body 2, wherein
Air intake 15 is provided with the antetheca 13 of main chamber body 2, the rear wall 5 of main chamber body 2 is provided with gas outlet.So that to be measured
The air stream of environment enters air channel 10 and then from gas outlet outflow by air intake 15, to realize dust is detected.Wherein air channel
10 are connected between air intake 15 and gas outlet.
As illustrated, light trapping 12 can be provided with main chamber body 2, for absorbing described light-emitting tube transmitting
Light, described lens subassembly is located 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 the laser that light trapping 12 absorption is injected, to reduce the noise of reflected light.Described
Light trapping 12 can be made using light absorbent, or carries out sub- optical processing to non-light absorbent.
Because 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 ambient temperature, and described critesistor can be installed on below circuit board 21, positioned at the wind of main cavity 2
Among road, for being modified to dust sensor output result according to ambient temperature.
In order to guide the circulation of air stream, described dust sensor can also include：Air extractor, positioned at described gas outlet
Place, for introducing, flowing out from gas outlet through described air channel from described air intake described air stream.As shown in Fig. 2 described take out
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, wherein the position of fan 3
It can be gas outlet position.
Fan 3 can form negative pressure so that air stream introduces from described air intake 15, through described in the way of using pumping
Air channel 10 is flowed out from gas outlet, as shown in Fig. 2 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 of pipe 30 transmitting can converge in the top of photo-sensitive cell 11, so that photo-sensitive cell 11 accepts the scattering through dust scattering
Light.Air channel 10 can be L-shaped, and the middle angle in described use 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, affect accuracy of detection.The afterbody in described air channel 10 opens air-vent 27, so that air stream is from air-vent 27
Flow out, air-vent 27 can be as shown in Figure 3.
As shown in figure 4, main cavity 2 can include covering 18 and main body 25, wherein air intake 15 may be located on lid 18
Or in main body 25.Air stream enters main cavity 2 from blowhole 15, may then pass through air inlet 17 and then the wind on circuit board 21
Road 10, Fig. 6 shows the air flow direction of the air stream by photo-sensitive cell 11.
As shown in fig. 7, upper lid 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.Baffle plate 20 can stop to big dust particle and debris, it is to avoid to specific in air stream
The detection of granule (such as PM2.5).
In addition, as shown in figure 8, main cavity 2 can be wrapped up by metal shell 26, metal shell 26 is used by link slot 8
Conductive material is connected with the GND of circuit board 21, so that 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.
Laser emission assembly 35 to be described below with reference to Fig. 9 a to Fig. 9 c.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.Detection hole 28 is provided with Laser emission assembly 35, it is right that photo-sensitive cell 11 can be installed
Should be in the lower section in detection hole 28, on circuit board 21.
Wherein, described lens subassembly can include lens or two lens, in the case of including two lens, the
One lens, for stating the light of light-emitting tube transmitting described in converging；Second lens, positioned at described light-emitting tube and described first lens
Between, the light for making described light-emitting tube transmitting is parallel with the optical axis of described first lens.
Described light emission component 35 can also include：Preposition diaphragm 27 and rearmounted diaphragm 29, to prevent light from reflecting.Along institute
State the path direction of the light of light-emitting tube transmitting, described rearmounted diaphragm 29 is located under first lens in described lens subassembly 35
Trip, described preposition diaphragm is located at the downstream of the lens converging described light in described preposition diaphragm and described lens subassembly.
Introduce in the case that lens subassembly includes lens below with reference to Figure 10 and Figure 11 by specific embodiment
The determination of detecting distance.
In figure test point 40 passes through the point converging after lens 36 for laser, and photo-sensitive cell 11 is located at below test point 40, sense
The detecting distance L of optical element 11 and lens 36 and test point 40 to lens 36 distance.For with the Laser emission of 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 that 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 also different.Therefore, obtained by following experiment：It is located at the scope of 2.2mw to 2.8mw in the power of described light-emitting tube
In the case of interior and a diameter of 6mm of described lens, described detecting distance L is dust sensor resolution highest during 12mm；With
And described light-emitting tube power be located at 3.2mw to 3.8mw in the range of and a diameter of 6mm of described lens in the case of,
Described detecting distance L is dust sensor resolution highest during 15mm.Certainly, those skilled in the art can be according to different light
The diameter of the power of transmitting tube and lens is determining suitable detecting distance L.
Change detecting distance L by changing LASER Discharge Tube 30 with the distance of lens 36, under the different detecting distance of record
The testing result of dust sensor, testing result is compared with the detected value of reference instrument acquisition error amount, then by difference
The error amount of detecting distance L is compared, and the minimum corresponding detecting distance L of error amount as makes dust sensor 1 reach
High-resolution value.
Table 1 to table 4 give LASER Discharge Tube power be located at 2.2mw to 2.8mw in the range of and described lens straight
Footpath is the error of dust sensor during different detecting distance L in the case of 6mm.
Table 1
Table 2
Table 3
Table 4
Can be drawn to table 4 by table 1, be located in the power of LASER Discharge Tube 30 in the range of 2.2mw to 2.8mw and saturating
In the case of a diameter of 6mm of mirror 36, when described detecting distance L is 12mm, the resolution highest of dust sensor.In above-mentioned reality
650 wave band of laser transmitting tubes can be adopted in testing, be certainly not limited to this wave band.
Table 5 to table 8 give LASER Discharge Tube power be located at 3.2mw to 3.8mw in the range of and described lens straight
Footpath is the error of dust sensor during different detecting distance L in the case of 6mm.
Table 5
Table 6
Table 7
Table 8
Can be drawn to table 4 by table 1, be located in the power of LASER Discharge Tube 30 in the range of 3.2mw to 3.8mw and saturating
In the case of a diameter of 6mm of mirror 36, when described detecting distance L is 15mm, the resolution highest of dust sensor.
Introduce in the case that lens subassembly includes two lens below with reference to Figure 12 and Figure 13 by specific embodiment
The determination of detecting distance.
As shown in Figure 12 and Figure 13, the light of lens 38 collimation laser transmitting tube 30 transmitting is so as to parallel to lens 37, lens
Directional light is converged to test point 40 (i.e. the focus of lens 37), the detecting distance L of photo-sensitive cell 11 and lens 37 and detection by 37
The distance (i.e. the focal length of lens 37) of point 40 to lens 37.For with the LASER Discharge Tube 30 of certain power, different convergences is saturating
Mirror (has different focal), and the test point 40 of convergence also can be different.In the case that lens subassembly includes two lens, along swash
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 also different.Therefore, obtained by following experiment：It is located at the scope of 2.2mw to 2.8mw in the power of described light-emitting tube
In the case of interior, described detecting distance L is dust sensor resolution highest during 8mm；And the power in described light-emitting tube
In the case of in the range of 3.2mw to 3.8mw, described detecting distance L is dust sensor resolution highest during 12mm.When
So, those skilled in the art can determine suitable detecting distance L according to the power of different light-emitting tubes.
To change detecting distance L by changing lens 36 (changing the focal length of lens 36), under the different detecting distance of record
The testing result of dust sensor, testing result is compared with the detected value of reference instrument acquisition error amount, then by difference
The error amount of detecting distance L is compared, and the minimum corresponding detecting distance L of error amount as makes dust sensor 1 reach
High-resolution value, and the lens that focal length is this detecting distance L are then to enable to dust sensor under this power condition to differentiate
Rate reaches highest lens.
Table 9 to table 12 give LASER Discharge Tube power be located in the range of 2.2mw to 2.8mw in the case of different inspections
Find range from L (there are the lens 37 of different focal) when dust sensor error.
Table 9
Table 10
Table 11
Table 12
Can be drawn to table 12 by table 9, be located in the range of 2.2mw to 2.8mw in the power of LASER Discharge Tube 30
In the case of, when described detecting distance L is 8mm (adopting the lens that focal length is 8mm as lens 37), the resolution of dust sensor
Rate highest.
Table 13 to table 16 give LASER Discharge Tube power be located in the range of 3.2mw to 3.8mw in the case of 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 to table 16 by table 13, be located in the range of 3.2mw to 3.8mw in the power of LASER Discharge Tube 30
In the case of, described detecting distance L be 12mm (i.e. adopt focal length be 12mm lens as lens 37) when, dust sensor point
Resolution highest.
It should be noted that this utility model is not limited to the power of above-mentioned LASER Discharge Tube, thus it is also not necessarily limited to above-mentioned inspection
Find range from L.
Describe preferred implementation of the present utility model above in association with accompanying drawing in detail, but, this utility model does not limit
Detail in above-mentioned embodiment, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out multiple simple variant, and these simple variant belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, this utility model is to each
Plant possible compound mode no longer separately to illustrate.
Additionally, combination in any can also be carried out, as long as it is not disobeyed between various different embodiment of the present utility model
Carry on the back thought of the present utility model, it equally should be considered as content disclosed in the utility model.
Claims (10)
1. a kind of dust sensor is 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 irradiating in described air channel the air stream of circulation, and
Lens subassembly, in the light path of described light, for converging the light of described light-emitting tube transmitting；
Photo-sensitive cell, in described air channel, for receiving the scattered light producing after described light irradiation 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 highest of sensor.
2. dust sensor according to claim 1 is it is characterised in that described lens subassembly includes lens.
3. dust sensor according to claim 2 it is characterised in that
Described light-emitting tube power be located at 2.2mw to 2.8mw in the range of and described lens a diameter of 6mm situation
Under, described detecting distance is 12mm；And
Described light-emitting tube power be located at 3.2mw to 3.8mw in the range of and described lens a diameter of 6mm situation
Under, described detecting distance is 15mm.
4. dust sensor according to claim 1 is it is characterised in that described lens subassembly includes：
First lens, for converging the light of described light-emitting tube transmitting；
Second lens, between described light-emitting tube and described first lens, for making the light of described light-emitting tube transmitting
Parallel with the optical axis of described first lens.
5. dust sensor according to claim 4 it is characterised in that
In the case that the power of described light-emitting tube is located in the range of 2.2mw to 2.8mw, described detecting distance and described the
The focal length of one lens is 8mm；And
In the case that the power of described light-emitting tube is located in the range of 3.2mw to 3.8mw, described detecting distance and described the
The focal length of one lens is 12mm.
6. dust sensor according to claim 1 is 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 located in main chamber body,
Air intake is provided with the antetheca of wherein said main cavity, the rear wall of main chamber body is provided with gas outlet.
7. dust sensor according to claim 6 is it is characterised in that described dust sensor also includes：Air extractor,
At described gas outlet, for described air stream is introduced, flows out from gas outlet through described air channel from described air intake.
8. dust sensor according to claim 6, it is characterised in that being provided with light trapping in main chamber body, is used for
Absorb the light of described light-emitting tube transmitting, described lens subassembly is located between described light trapping and described light-emitting tube.
9. dust sensor according to claim 1 is it is characterised in that described dust sensor also includes critesistor,
For detecting the temperature of dust place to be measured environment.
10. the dust sensor according to any one of claim 1-9 is it is characterised in that described light emission component also wraps
Include：Preposition diaphragm and rearmounted diaphragm, along the path direction of the light of described light-emitting tube transmitting, described rearmounted diaphragm is located at described
The downstream of first lens in lens subassembly, described preposition diaphragm is located in described preposition diaphragm and described lens subassembly and converges institute
State the downstream of the lens of light.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620888257.XU CN205982006U (en) | 2016-08-16 | 2016-08-16 | Dust sensor |
| PCT/CN2017/082953 WO2018032802A1 (en) | 2016-08-16 | 2017-05-03 | Dust sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620888257.XU CN205982006U (en) | 2016-08-16 | 2016-08-16 | Dust sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205982006U true CN205982006U (en) | 2017-02-22 |
Family
ID=58030741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620888257.XU Withdrawn - After Issue CN205982006U (en) | 2016-08-16 | 2016-08-16 | Dust sensor |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053311A (en) * | 2016-08-16 | 2016-10-26 | 广东美的制冷设备有限公司 | Dust sensor |
| WO2018032802A1 (en) * | 2016-08-16 | 2018-02-22 | 广东美的制冷设备有限公司 | Dust sensor |
| CN109187296A (en) * | 2018-09-03 | 2019-01-11 | 海拉（厦门）电气有限公司 | A kind of laser PM2.5 dust sensor with self-purifying system |
-
2016
- 2016-08-16 CN CN201620888257.XU patent/CN205982006U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053311A (en) * | 2016-08-16 | 2016-10-26 | 广东美的制冷设备有限公司 | Dust sensor |
| WO2018032802A1 (en) * | 2016-08-16 | 2018-02-22 | 广东美的制冷设备有限公司 | Dust sensor |
| CN106053311B (en) * | 2016-08-16 | 2019-04-30 | 广东美的制冷设备有限公司 | A kind of dust sensor |
| CN109187296A (en) * | 2018-09-03 | 2019-01-11 | 海拉（厦门）电气有限公司 | A kind of laser PM2.5 dust sensor with self-purifying system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170222 Effective date of abandoning: 20190430 |
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| AV01 | Patent right actively abandoned |