CN206002421U - A kind of household electrical appliance, dust sensor and its caliberating device - Google Patents
A kind of household electrical appliance, dust sensor and its caliberating device Download PDFInfo
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- CN206002421U CN206002421U CN201621050497.9U CN201621050497U CN206002421U CN 206002421 U CN206002421 U CN 206002421U CN 201621050497 U CN201621050497 U CN 201621050497U CN 206002421 U CN206002421 U CN 206002421U
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Abstract
The utility model is related to dust concentration detection field, discloses a kind of household electrical appliance, dust sensor and its caliberating device, and the dust sensor includes：Device for detecting particles, detects the population of dust to be measured in air-flow；Airflow detecting device, at the position that the air-flow passes through, detects flow parameter；And processing meanss, it is connected with the device for detecting particles and the airflow detecting device, dust concentration is determined according to the population and the flow parameter.Impact of the air-flow to result can be so avoided, improves the degree of accuracy of dust sensor.
Description
Technical field
The utility model is related to dust concentration detection field, in particular it relates to a kind of household electrical appliance, dust sensor and its
Caliberating device.
Background technology
Dust sensor, such as laser dust concentration sensor are in the air suspended particulate to be entered using MIE scattering theory
Row count or mass concentration measurement mode obtaining the device of dust concentration.Generally swash with an air-guiding aisle, one
Light-emitting tube and a photo-sensitive cell.Air-flow is flowed in air-guiding aisle, is subject to laser to irradiate and produces when flowing through above photosensitive part
Raw scattered light, photosensitive part receives scattered light, by being analyzed to scattered light to obtain the situation of dust in air-flow.
Generally dust sensor gas is flowed freely over above test point, and test point position is arranged at LASER Discharge Tube convergence
Focal point.Under normal circumstances, in order to ensuring steady air current property guides air-flow to flow through the top of test point using a DC fan.
The stability of DC fan can affect the service life of the stability of sensor, DC fan then affect actually making for sensor
Use the life-span.
Utility model content
The purpose of this utility model is to provide a kind of household electrical appliance, dust sensor and its caliberating device, the household electrical appliance,
Dust sensor and its scaling method, caliberating device can avoid impact of the air-flow to testing result, improve dust sensor
The degree of accuracy.
To achieve these goals, the utility model provides a kind of dust sensor, and the dust sensor includes：Particle
Detection means, detects the population of dust to be measured in air-flow；Airflow detecting device, at the position that the air-flow passes through,
Detection flow parameter；And processing meanss, it is connected with the device for detecting particles and the airflow detecting device, according to the grain
Subnumber and the flow parameter are determining dust concentration.
Alternatively, the device for detecting particles includes：Light emission component and photo-sensitive cell.
Alternatively, the light emission component includes：Light-emitting tube, launching light to irradiate the air-flow circulated in air channel, and thoroughly
Mirror assembly, in the light path of the light, for converging the light of light-emitting tube transmitting；Wherein, the photo-sensitive cell is located at
In the air channel, for receiving the scattered light produced after the light irradiation dust.
Alternatively, the light emission component also includes：Preposition diaphragm and rearmounted diaphragm.
Alternatively, in air channel, wherein, the air-flow of dust content to be measured is in the air channel for the airflow detecting device
Middle circulation.
Alternatively, the dust sensor also includes air extractor, on the wall of the dust sensor, for drawing
Flow guide is circulated in air channel.
Alternatively, the upper lid of the dust sensor is provided with baffle arrangement, to entering the air-flow of the dust sensor
Carrying out stop makes which flow in the air channel.
Alternatively, the airflow detecting device is flow sensor or baroceptor.
Correspondingly, the utility model also provides a kind of household electrical appliance, and the household electrical appliance include above-mentioned dust sensor.
Correspondingly, the utility model also provides a kind of caliberating device of dust sensor, and the caliberating device includes：Above-mentioned
Dust sensor, the flow parameter in the population of the dust at n calibration point of detection and the dust sensor；Regulator
Device, detects the dust concentration of n calibration point；Processor, is connected with the dust sensor and the reference instrument, according to all
The population of the above-mentioned dust at calibration point, the flow parameter and the dust concentration determine calibration coefficient.
By technique scheme, airflow detecting device is installed in dust sensor airflow condition is detected, based on treating
Flow parameter in surveying the population of dust and dust sensor is determining dust concentration.Air-flow can so be avoided to result
Impact, improves the degree of accuracy of dust sensor.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is used to provide and further understands to of the present utility model, and constitutes a part for specification, and following
Specific embodiment be used for together explaining the utility model, but do not constitute to restriction of the present utility model.In the accompanying drawings：
Fig. 1 is the structured flowchart of the dust sensor provided according to a kind of embodiment of the utility model；
Fig. 2 is the structural representation of the dust sensor provided according to a kind of embodiment of the utility model；
Fig. 3 is the overview diagram of the dust sensor provided according to a kind of embodiment of the utility model；
Fig. 4 is the diagram of the main cavity of the dust sensor provided according to a kind of embodiment of the utility model；
Fig. 5 is the diagram of the upper lid of the dust sensor provided according to a kind of embodiment of the utility model；
Fig. 6 is the diagram in the upper base portion of the dust sensor provided according to a kind of embodiment of the utility model；
Fig. 7 is the assembling of the Laser emission component of the dust sensor provided according to a kind of embodiment of the utility model
Figure；
Fig. 8 is the side-looking of the Laser emission component of the dust sensor provided according to a kind of embodiment of the utility model
Figure；
Fig. 9 is the Laser emission component bottom figure of the dust sensor provided according to a kind of embodiment of the utility model
Show；
Figure 10 is the flow chart of the scaling method of the dust sensor provided according to a kind of embodiment of the utility model；
Figure 11 is the flow chart of the scaling method of the dust sensor provided according to the utility model another embodiment；
And
Figure 12 is the structured flowchart of the caliberating device of the dust sensor provided according to a kind of embodiment of the utility model.
Description of reference numerals
1 antetheca, 2 flow sensor
Cover on 4 rear walls 5
6 main cavity, 7 circuit board
8 fan, 9 light trapping
10 Laser emission component mounting groove, 11 U-shaped air channel
12 fan mounting groove, 13 air intake
14 gas outlet, 15 Laser emission component
16 photo-sensitive cell, 17 LASER Discharge Tube installation site
18 preposition diaphragm, 19 rearmounted diaphragm
20 detection 22 Laser emission assembly radiating holes of hole
23 baffle arrangement, 24 circuit board air inlet
25 socket mounting hole, 26 flow sensor installation site
27 LASER Discharge Tube, 100 device for detecting particles
200 airflow detecting device, 300 processing meanss
120 dust sensor, 130 reference instrument
140 processors
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains the utility model, is not limited to the utility model.
Fig. 1 is a kind of structural representation of the dust sensor provided according to a kind of embodiment of the utility model.As Fig. 1
Shown, the dust sensor that the utility model is provided can include：Device for detecting particles 100, detects dust to be measured in air-flow
Population；Airflow detecting device 200, at the position that the air-flow passes through, detects flow parameter；And processing meanss
300, it is connected with the device for detecting particles 100 and the airflow detecting device 200, is joined according to the population and the air-flow
Count to determine dust concentration.Impact of the air-flow to result can be so avoided, improves the degree of accuracy of dust sensor.
Generally, dust sensor includes air channel, and the air-flow of dust content to be measured is circulated in air channel, as detection of particles is filled
The population that 100 detections are dust to be measured in air channel is put, be therefore, it can by airflow detecting device 200 in the air channel,
So that the air-flow of its detection is corresponding to the air-flow residing for device for detecting particles 100, so as to improve accuracy of detection.
In one embodiment, the device for detecting particles 100 can include：Light emission component and photo-sensitive cell, light
Can be but be not limited to laser.
Wherein, the light emission component can include：Light-emitting tube, launching light with irradiate in air channel circulate air-flow, and
Lens subassembly, in the light path of the light, for converging the light of light-emitting tube transmitting；Wherein, the photo-sensitive cell position
In the air channel, for receiving the scattered light produced after the light irradiation dust.
The light emission component can also include：Preposition diaphragm and rearmounted diaphragm, to prevent light from reflecting.
The dust sensor can also include air extractor, on the wall of the dust sensor, for guiding
Air-flow is circulated in air channel.Wherein, the air extractor can be for example mounted on the wall of the sensor relative with entrance
Fan.
The upper lid of the dust sensor can be provided with baffle arrangement, and the air-flow to entering the dust sensor is carried out
Stopping makes which flow in the air channel.
The utility model is described in detail by specific embodiment below with reference to Fig. 2 to Fig. 6, it should be noted that
It is that the utility model is not restricted to this.
As shown in Figures 2 to 6, processing meanss 300 can be the form of circuit board 7.Air intake 13 can be, but not limited to set
Put on the antetheca 1 of the main cavity 6 of dust sensor, fan 8, wind can be set by fan mounting groove 12 in its rear wall 4
Fan 8 can be coincided with the position of gas outlet 14；If circuit board 7 is located at the lower section of air intake 13, can arrange thereon
Circuit board air inlet 24, so that air-flow enters U-shaped air channel 11.It should be noted that air channel is not restricted to U-shaped, which is permissible
It is any appropriate shape, such as L-shaped.Fan 8 can guide air-flow to enter U-shaped air channel.
One baffle arrangement 23 can be set on the upper lid 5 of dust sensor, after air-flow is stopped by baffle arrangement 23, by electricity
In the U-shaped air channel 11 that road plate air inlet 24 is entered in main cavity 6.Upper lid 5 can be by screw column 24 using screw and main cavity 6
Fit together.Dust sensor can be powered by being installed on the socket at socket mounting hole 25.Laser emission component can
To be installed in dust sensor by Laser emission component mounting groove 10, it is possible to arrange Laser emission assembly radiating hole 22,
To distribute heat, it is to avoid laser module is overheated.
Fig. 7 to 9 is the Laser emission component 15 of the dust sensor provided according to a kind of embodiment of the utility model
Diagram.
Light trapping 9 can be provided with main chamber body 6, be installed at LASER Discharge Tube installation site 17 for absorbing
LASER Discharge Tube 27 launch light, the lens subassembly is Wei Yu the light trapping 9 and the LASER Discharge Tube 27 between.Photosensitive
Element 16 can be placed in U-shaped air channel 11, and the laser that LASER Discharge Tube 27 sends can be parallel with photo-sensitive cell 16.Launched
Laser can be irradiated in the light trapping 9 in main cavity 6 through the surface of photo-sensitive cell 16, and what the absorption of light trapping 9 was injected swashs
Light, to reduce the noise of reflected light.The light trapping 9 can be made using light absorbent, or carries out sub- light to non-light absorbent
Process.As shown in Figure 7 to 9, Laser emission component 15 can arrange with circuit board 7.Photo-sensitive cell 16 may be located at detection
The inside in hole 20 or the lower section in detection hole 20.Compared with rearmounted diaphragm 19, preposition diaphragm 18 is with detection pitch-row from less.In addition,
LASER Discharge Tube louvre can be set, to be radiated.
In one embodiment, LASER Discharge Tube 27 can be sent out from diameter 6mm, power 3.6mw, the laser of 650 wave bands
Penetrate pipe.27 front end of the LASER Discharge Tube is provided with lens, and laser beam is converged in the position of front end 15cm, i.e. photo-sensitive cell
Directly over 16.
In one embodiment, the flow sensor 2 for being installed on position 26 can be used as airflow detecting device.Which is permissible
Installation site can be in the same plane with photo-sensitive cell 16, to detect same air-flow as far as possible.
For above-mentioned dust sensor, the utility model also provides a kind of scaling method of dust sensor.As Figure 10 institute
Show, at step 101, select n calibration point；At step 102, obtain for each calibration point dust population Ni,
Flow parameter Xi in dust concentration Mi and the dust sensor, wherein i=1,2 ... ..., n；And at step 103,
Population, dust concentration and flow parameter according to the dust at all calibration points is determining the dust sensor
Calibration coefficient.Impact of the air-flow to result can be so avoided, improves the degree of accuracy of dust sensor.
Wherein it is determined that the calibration coefficient of the dust sensor includes：The grain of the dust at all calibration points
Subnumber, dust concentration and flow parameter carry out least-squares algorithm linear fitting to obtain the calibration coefficient.
In the case that the flow parameter is directly proportional to the population of the dust, calibration coefficient can be from equation (1)
(2) draw：
Above-mentioned calibration coefficient can be stored in dust sensor, when dust sensor carries out dust detection, permissible
Dust concentration is calculated by equation (3) based on the calibration coefficient：
M=a*N/X+b (3)
Wherein, N is the population of the dust measured by the dust sensor, and X is the flow parameter in dust sensor.
In the case that the population of the flow parameter and the dust is inversely proportional to, calibration coefficient can be from equation (4)
(5) draw：
Above-mentioned calibration coefficient can be stored in dust sensor, when dust sensor carries out dust detection, permissible
Dust concentration is calculated by equation (6) based on the calibration coefficient：
M=a*N*X+b (6)
Wherein, N is the population of the dust measured by the dust sensor, and X is the flow parameter in dust sensor.
The flow parameter is one of following item：Gas flow, gas pressure and institute in the dust sensor
State the electrical quantity of airflow detecting device.
The utility model is described in detail by specific embodiment below with reference to Figure 11, it is noted that
The utility model is not restricted to this.
In this embodiment, gas flow is measured by using flow sensor, due to constant in external environment condition
In the case of, the gas flow in same air channel and the population of dust are directly proportional.I.e. the output of flow sensor and by detection
The population of point is directly proportional.
In the embodiment using flow sensor, when dust sensor is demarcated due to flow L and dust sensor
Population N of identification is directly proportional, N/L=constant when extraneous dust concentration is certain, the reality in the constant and current environment
Border dust concentration is related.
Generally dust sensor directly carries out curve fitting to demarcate when demarcating using population N and mass density M, but
It is the method as by airflow influence, accuracy can be lowered.The dust sensor that the utility model is provided can when demarcating
To be carried out curve fitting using N/L and mass density M, the consideration of flow relevant parameter is being demarcated in flow process, so as to provide powder
The accuracy of dirt testing result.
As shown in figure 11, at step 111, n calibration point, calibration point 1, calibration point 2, calibration point 3, calibration point are determined
4 ... calibration point n；
At step 112, i=1 is initialized；
At step 113, the stream of population Ni, dust concentration Mi and flow sensor at i-th calibration point is recorded
Amount Li；
At step 114, judge i whether more than or equal to n；
If i is less than n, at step 115, i=i+1 is set, then goes to step 113；
For example：Record population N1 at the 1st calibration point, dust concentration M1 measured by reference instrument and flow to pass
Gas flow L1 measured by sensor；
Record population N2 at the 2nd calibration point, dust concentration M2 measured by reference instrument and flow sensor
Measured gas flow L2；
Record population N3 at the 3rd calibration point, dust concentration M3 measured by reference instrument and flow sensor
Measured gas flow L3；
……
Until it is corresponding (Ni, Vi, Mi) to have recorded n calibration point.
At step 116, linear fit is carried out to (N1/L1, N2/L2...Nn/Ln) and (M1, M2 ... Mn) two groups of numbers
To calculate transducer calibration coefficient, as gas flow is directly proportional to population, therefore calibration coefficient will equation (1) and (2)
In Xi replace with after gas flow Li obtained by result；
At step 117, during calibration coefficient is preserved to the memory of dust sensor, to utilize in test dust
Equation (3) is calculating dust concentration.
Certainly above-mentioned gas flow can also be represented using the electrical quantity of flow sensor, the electrical quantity and gas flow
Associated, such as electric current, voltage or power etc..
It is of course also possible to use baroceptor is detecting flow parameter, such as air pressure.The constant situation of external environment condition
Under, in same air channel, the pressure of gas and flow velocity are inversely proportional to, and flow velocity and flow are directly proportional.That is, baroceptor is defeated
Go out and be inversely proportional to by the population of test point.
When dust sensor is demarcated, as population N that pressure P and sensor are recognized is inversely proportional to, dense in external dust
N*P=constant when spending certain, the constant are related to the actual dust concentration in current environment.
Generally sensor is directly carried out curve fitting demarcation using population N and mass density M when demarcating, as mentioned above
Due to being subject to airflow influence, accuracy can be lowered the method.The dust sensor that the utility model is provided is made when demarcating
Carried out curve fitting with N*P and mass density M, flow relevant parameter is write body and is first being demarcated in flow process.
As the air pressure measured by baroceptor and population are inversely proportional to, therefore calibration coefficient can be according to equation (4)
(5) determining, and during the calibration coefficient of determination is stored to the memory of dust sensor, so as to root during detection dust concentration
Dust concentration (concentration of such as PM2.5) is calculated according to equation (6).
The utility model writes on flow relevant parameter in demarcation flow process in advance.In time can be right while changes in flow rate
The parameter of sensor is modified, and is easily subject to the problem of the impact of external air flow so as to overcome sensor.Simultaneously because stream
The life and reliability of quantity sensor and baroceptor is well beyond the DC fan being usually used, thus reduces sensor
Requirement to blower fan stability, and improve life-span and the stability in use of dust sensor.
Correspondingly, the utility model also provides a kind of household electrical appliance, and the household electrical appliance include above-mentioned dust sensor.
In addition, the utility model also provides a kind of caliberating device of dust sensor, the caliberating device includes：Above-mentioned powder
Dust sensor 120, the flow parameter in the population of the dust at n calibration point of detection and the dust sensor 120；Mark
Quasi- instrument 130, detects the dust concentration of n calibration point；Processor 140, with the dust sensor 120 and the reference instrument
130 connections, population according to the above-mentioned dust at all calibration points, the flow parameter and the dust concentration determine demarcates
Coefficient.Impact of the air-flow to result can be so avoided, improves the degree of accuracy of dust sensor.
Detail and benefit about the caliberating device of dust sensor and the above-mentioned demarcation side for dust sensor
Method details and benefit identical, repeat no more in this.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, but, the utility model is not limited
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, the utility model is to each
Plant possible combination no longer separately to illustrate.
Additionally, can also be combined between a variety of embodiments of the present utility model, as long as which is not disobeyed
Thought of the present utility model is carried on the back, which should equally be considered as content disclosed in the utility model.
Claims (10)
1. a kind of dust sensor, it is characterised in that the dust sensor includes：
Device for detecting particles, detects the population of dust to be measured in air-flow；
Airflow detecting device, at the position that the air-flow passes through, detects flow parameter；And
Processing meanss, are connected with the device for detecting particles and the airflow detecting device, according to the population and the gas
Flow parameter to determine dust concentration.
2. dust sensor according to claim 1, it is characterised in that the device for detecting particles includes：Light transmitting group
Part and photo-sensitive cell.
3. dust sensor according to claim 2, it is characterised in that
The light emission component includes：
Light-emitting tube, launching light with irradiate in air channel circulate air-flow, and
Lens subassembly, in the light path of the light, for converging the light of light-emitting tube transmitting；
Wherein, the photo-sensitive cell is located in the air channel, for receiving the scattered light produced after the light irradiation dust.
4. dust sensor according to claim 3, it is characterised in that the light emission component also includes：Preposition diaphragm
With rearmounted diaphragm.
5. dust sensor according to claim 1, it is characterised in that the airflow detecting device in air channel,
Wherein, the air-flow of dust content to be measured is circulated in the air channel.
6. dust sensor according to claim 1, it is characterised in that the dust sensor also includes air extractor,
On the wall of the dust sensor, for guiding air-flow to circulate in air channel.
7. dust sensor according to claim 6, it is characterised in that the upper lid of the dust sensor is provided with baffle plate
Structure, the air-flow to entering the dust sensor carries out stop makes which flow in the air channel.
8. dust sensor according to any one of claim 1 to 7, it is characterised in that the airflow detecting device is
Flow sensor or baroceptor.
9. a kind of household electrical appliance, it is characterised in that the household electrical appliance include the dust any one of claim 1 to 8
Sensor.
10. a kind of caliberating device of dust sensor, it is characterised in that the caliberating device includes：
Dust sensor any one of claim 1 to 8, the population of the dust at n calibration point of detection and institute
State the flow parameter in dust sensor；
Reference instrument, detects the dust concentration of n calibration point；
Processor, is connected with the dust sensor and the reference instrument, according to the grain of the above-mentioned dust at all calibration points
Subnumber, the flow parameter and the dust concentration determine calibration coefficient.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621050497.9U CN206002421U (en) | 2016-09-12 | 2016-09-12 | A kind of household electrical appliance, dust sensor and its caliberating device |
| PCT/CN2017/082952 WO2018045768A1 (en) | 2016-09-12 | 2017-05-03 | Home appliance, dust sensor and calibration method and calibration apparatus therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621050497.9U CN206002421U (en) | 2016-09-12 | 2016-09-12 | A kind of household electrical appliance, dust sensor and its caliberating device |
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| Publication Number | Publication Date |
|---|---|
| CN206002421U true CN206002421U (en) | 2017-03-08 |
Family
ID=58193479
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621050497.9U Active CN206002421U (en) | 2016-09-12 | 2016-09-12 | A kind of household electrical appliance, dust sensor and its caliberating device |
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| Country | Link |
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| CN (1) | CN206002421U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018045768A1 (en) * | 2016-09-12 | 2018-03-15 | 广东美的制冷设备有限公司 | Home appliance, dust sensor and calibration method and calibration apparatus therefor |
| CN112014278A (en) * | 2020-08-14 | 2020-12-01 | 光力科技股份有限公司 | Portable gas parameter measuring module and portable gas parameter measuring instrument |
-
2016
- 2016-09-12 CN CN201621050497.9U patent/CN206002421U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018045768A1 (en) * | 2016-09-12 | 2018-03-15 | 广东美的制冷设备有限公司 | Home appliance, dust sensor and calibration method and calibration apparatus therefor |
| CN112014278A (en) * | 2020-08-14 | 2020-12-01 | 光力科技股份有限公司 | Portable gas parameter measuring module and portable gas parameter measuring instrument |
| CN112014278B (en) * | 2020-08-14 | 2024-01-02 | 光力科技股份有限公司 | Portable gas parameter measurement module and portable gas parameter measuring instrument |
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