CN209446426U - A kind of air passage structure of laser class detection of air quality module - Google Patents
A kind of air passage structure of laser class detection of air quality module Download PDFInfo
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- CN209446426U CN209446426U CN201822092260.2U CN201822092260U CN209446426U CN 209446426 U CN209446426 U CN 209446426U CN 201822092260 U CN201822092260 U CN 201822092260U CN 209446426 U CN209446426 U CN 209446426U
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- air
- air inlet
- gas outlet
- quality module
- laser class
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Abstract
The utility model discloses a kind of air passage structures of laser class detection of air quality module comprising air inlet air flue, main airway and secondary air flue；The secondary air flue is used to accommodate the photoelectric cell of laser class detection of air quality module, offers incidence hole and light hole facing each other on the secondary air flue side wall；The secondary air inlet of the primary air inlet of the main airway and time air flue is connected and communicates with the gas outlet of air inlet air flue, and the sectional area of the secondary air inlet is less than the sectional area of primary air inlet.The utility model can make laser class detection of air quality module under the premise of not influencing detection sensitivity and interference free performance, guarantee the service life of laser class detection of air quality module.
Description
Technical field
The utility model relates to the technical fields of Detection of Air Quality equipment, particularly relate to a kind of laser class air quality inspection
Survey the air passage structure of module.
Background technique
Cooperate shown in Fig. 1, in the prior art, laser class PM2.5 detection of air quality module generally comprises air flue 1 ', extinction
2 ', laser module 3 ' and photoelectric cell 4 ' are fallen into, photoelectric cell 4 ' generally uses photodiode；Wherein air flue 1 ' is typically all
Single air passage structure, air flue 1 ' have air inlet 11 ' and gas outlet 12 ', offer facing each other to enter on the side wall of air flue 1 '
Unthreaded hole 13 ' and light hole 14 ', incidence hole 13 ' are used for laser light incident, and light hole 14 ' is used for laser emitting；Extinction falls into 2 ' for inhaling
Laser is received, extinction falls into 2 ' and is set to air flue 1 ' outside and is connected with light hole 14 ', and photoelectric cell 4 ' is set in air flue 1 ', is swashed
Optical module 3 ' is set to air flue 1 ' outside and emits laser for interior from incidence hole 13 ' to air flue 1 '；Existing this laser class
PM2.5 detection of air quality module when in use, is passed through detection air-flow in the air flue 1 ' from air inlet 11 ', and mode of laser group 3 '
The laser of sending is incident in air flue 1 ' from incidence hole 13 ', and the laser a part being incident in air flue 1 ' is emitted from light hole 14 '
It is fallen into 2 ' to extinction and 2 ' absorptions is fallen by extinction, it is a part of then touched with the particle contained in the detection air-flow that enters in air flue 1 '
It hits and scatters, the laser part of scattering is absorbed by photoelectric cell 4 ' and photoelectric cell 4 ' is made to generate electric current；If into
The particle contained in detection air-flow in air flue 1 ' is more, then the laser that photoelectric cell 4 ' absorbs is more, thus photoelectric cell
4 ' generate size of current can reaction detection air-flow air quality.But current this laser class PM2.5 air quality
Detection module has that air flue 1 ' is easy accumulation dust, and dust in air flue 1 ' is more can cover photoelectric cell 4 ' and lead
The serious detection accuracy decline for reducing laser class PM2.5 detection of air quality module is caused, laser class PM2.5 air has been seriously affected
The service life of quality detection module；Since the dust stratification of air flue 1 ' is not easily cleaned, at present generally by reduction detection air-flow
Flow velocity, so that the mass flow of the detection air-flow entered in air flue 1 ' reduces, so that the dust into air flue 1 ' is reduced,
And then the time for delaying photoelectric cell 4 ' to be completely covered by by dust, to guarantee laser class PM2.5 detection of air quality module
Service life；But the too low inspection that can reduce laser class PM2.5 detection of air quality module of detection air-flow velocity in air flue 1 '
Survey sensitivity and interference free performance.
Utility model content
The purpose of this utility model is to provide a kind of air passage structures of laser class detection of air quality module, can make
Laser class detection of air quality module guarantees laser class air matter under the premise of not influencing detection sensitivity and interference free performance
Measure the service life of detection module.
In order to achieve the above objectives, the solution of the utility model is:
A kind of air passage structure of laser class detection of air quality module comprising the air inlet gas with air inlet and air outlet
Road, the main airway with primary air inlet and main gas outlet and the secondary air flue with secondary air inlet and secondary gas outlet；The secondary gas
Road is used to accommodate the photoelectric cell of laser class detection of air quality module, offers facing each other to enter on the secondary air flue side wall
Unthreaded hole and light hole；The secondary air inlet of the primary air inlet of the main airway and time air flue is connected with the gas outlet of air inlet air flue and phase
Logical, the sectional area of the secondary air inlet is less than the sectional area of primary air inlet.
The sectional area of the secondary air inlet is the 10% ~ 30% of the sectional area of primary air inlet.
The secondary gas outlet of the secondary air flue is provided on main airway side wall, and the sectional area of secondary gas outlet is less than primary air inlet
Sectional area.
The sectional area of the secondary gas outlet is the 10% ~ 30% of the sectional area of primary air inlet.
The incidence hole outer end is connected with the accommodating cavity for fixed laser module；The light hole outer end with for inhaling
The absorption for receiving laser, which is fallen into, to be connected.
The outgassing direction of the gas outlet is identical as the airintake direction of the primary air inlet.
First angle formed by the airintake direction of the outgassing direction of the main gas outlet and the secondary air inlet be right angle or
Obtuse angle.
The outgassing direction of the gas outlet is vertical with the airintake direction of the primary air inlet.
The outgassing direction of the gas outlet is identical as the airintake direction of the secondary air inlet.
First angle formed by the airintake direction of the outgassing direction of the main gas outlet and the secondary air inlet is obtuse angle, institute
Stating the second angle formed by the outgassing direction of gas outlet and the airintake direction of the secondary air inlet is acute angle.
After adopting the above scheme, the utility model has the following characteristics that
1, when laser class detection of air quality module use the utility model air passage structure when, due to main airway master into
The secondary air inlet of port and time air flue is connected and communicates with the gas outlet of air inlet air flue, the detection gas come out in this way from air inlet air flue
Stream a part can enter in main airway from primary air inlet, another part then can time air inlet enter in time air flue；And due to
The sectional area of the secondary air inlet is less than the sectional area of primary air inlet, this makes the detection gas mass flows at time air inlet small
Detection gas mass flows at primary air inlet, so that the detection gas mass flows entered in time air flue are small and make
The dust that must be entered in time air flue is few, and then the photoelectric cell extended in time air flue is guaranteed by time that dust is completely covered by
The service life of laser class detection of air quality module；Therefore the utility model just can make without reducing the flow velocity of detection air-flow
Enter the small service life to guarantee laser class detection of air quality module of detection gas mass flows in time air flue, and nothing
The flow velocity that detection air-flow need to be reduced then will not influence the detection sensitivity and interference free performance of laser class detection of air quality module；
2, when laser class detection of air quality module use the utility model air passage structure when, due to main airway master into
The secondary air inlet of port and time air flue is connected and communicates with the gas outlet of air inlet air flue, the detection gas come out in this way from air inlet air flue
Stream a part can enter in main airway from primary air inlet, another part then can time air inlet enter in time air flue；And due to
The sectional area of the secondary air inlet is less than the sectional area of primary air inlet, contains in this detection air-flow that air inlet air flue is come out
Bulky grain of the partial size greater than 10 microns is then exhausted from after entering main airway under effect of inertia, enters the detection gas of time air flue in this way
Bulky grain of the partial size contained in stream greater than 10 microns just reduces, to reduce bulky grain of the partial size greater than 10 microns to laser
The detection of type detection of air quality module interferes.
Detailed description of the invention
Fig. 1 is existing laser class PM2.5 detection of air quality module structural schematic diagram；
Fig. 2 is the structural schematic diagram of the utility model embodiment one；
Fig. 3 is the structural schematic diagram of the utility model embodiment two；
Fig. 4 is the structural schematic diagram of the utility model embodiment three；
Fig. 5 is the structural schematic diagram of the utility model embodiment four；
Fig. 6 is the structural schematic diagram of the utility model embodiment five；
Label declaration:
Background technique:
Air flue 1 ', air inlet 11 ', gas outlet 12 ', incidence hole 13 ', light hole 14 ', extinction sunken 2 ', laser module 3 ', light
Electric device 4 ',
Specific embodiment:
Air inlet air flue 1, air inlet 11, gas outlet 12,
Main airway 2, primary air inlet 21, main gas outlet 22,
Secondary air flue 3, secondary air inlet 31, secondary gas outlet 32, incidence hole 33, light hole 34,
Accommodating cavity 4,
It absorbs and falls into 5.
Specific embodiment
As shown in Figures 2 to 6, the utility model discloses a kind of air passage structure of laser class detection of air quality module,
It include the air inlet air flue 1 with air inlet 11 and gas outlet 12, with primary air inlet 21 and the main airway of main gas outlet 22 2 with
And the secondary air flue 3 with secondary air inlet 31 and time gas outlet 32；Wherein secondary air flue 3 is for accommodating laser class Detection of Air Quality mould
The secondary air flue 3 of the photoelectric cell of block, offers incidence hole 33 and light hole 34 facing each other on secondary 3 side wall of air flue, it is described enter
Unthreaded hole 33 is used for laser light incident, and 33 outer end of incidence hole is connected with the accommodating cavity 4 for fixed laser module, the light out
Hole 34 is used for laser emitting, and 34 outer end of light hole falls into 5 with the absorption for absorbing laser and is connected.
Cooperate shown in Fig. 2 to Fig. 6, the secondary air inlet 31 and air inlet gas of the primary air inlet 21 of the main airway 2 and time air flue 3
The gas outlet 12 in road 1 is connected and communicates；The sectional area of the secondary air inlet 31 is less than the sectional area of primary air inlet 21, secondary air inlet
31 sectional area is preferably the 10% ~ 30% of the sectional area of primary air inlet 21；The secondary gas outlet 32 of the secondary air flue 3 is provided with main gas
On 2 side wall of road, the sectional area of secondary gas outlet 32 is less than the sectional area of primary air inlet 21, based on the sectional area of secondary air inlet 22 is preferred
The 10% ~ 30% of the sectional area of air inlet 21.Wherein, cooperate shown in Fig. 2, in the utility model embodiment one, the air inlet gas
Third angle theta formed by 11 airintake direction of air inlet and 12 outgassing direction of gas outlet in road 1 is acute angle, and the gas outlet 12 goes out
Gas direction is identical as the airintake direction of the primary air inlet 21, the outgassing direction of the main gas outlet 21 and the secondary air inlet 31
Airintake direction formed by the first angle α be obtuse angle；Cooperate shown in Fig. 3, in the utility model embodiment two, the air inlet gas
Third angle theta formed by 11 airintake direction of air inlet and 12 outgassing direction of gas outlet in road 1 is obtuse angle, and the gas outlet 12 goes out
Gas direction is identical as the airintake direction of the primary air inlet 21, the outgassing direction of the main gas outlet 21 and the secondary air inlet 31
Airintake direction formed by the first angle α be obtuse angle；Cooperate shown in Fig. 4, in the utility model embodiment three, the air inlet gas
11 airintake direction of air inlet in road 1 is identical as 12 outgassing direction of gas outlet, the outgassing direction of the gas outlet 12 and the master into
The airintake direction of port 21 is vertical, formed by the airintake direction of the outgassing direction of the main gas outlet 21 and the secondary air inlet 31
First angle α is obtuse angle, the second folder formed by airintake direction of the outgassing direction of the gas outlet 12 with the secondary air inlet 31
Angle beta is acute angle；Cooperate shown in Fig. 5, in the utility model embodiment four, 11 airintake direction of air inlet of the air inlet air flue 1
Identical as 12 outgassing direction of gas outlet, the outgassing direction of the gas outlet 12 is identical as the airintake direction of the primary air inlet 21,
First angle α formed by the airintake direction of the outgassing direction of the main gas outlet 21 and the secondary air inlet 31 is right angle；Cooperation
Shown in Fig. 6, in the utility model embodiment five, 11 airintake direction of air inlet and 12 outlet of gas outlet of the air inlet air flue 1
Direction is identical, and the outgassing direction of the gas outlet 12 is vertical with the airintake direction of the primary air inlet 21, the gas outlet 12
Outgassing direction is identical as the airintake direction of the secondary air inlet 31.
When laser class detection of air quality module use the utility model air passage structure when, due to main airway 2 master into
Port 21 and time secondary air inlet 31 of air flue 3 are connected and communicate with the gas outlet 12 of air inlet air flue 1, go out in this way from air inlet air flue 1
The detection air-flow a part come can enter in main airway 2 from primary air inlet 21, another part then can time air inlet 31 enter
In secondary air flue 3；And since the sectional area of the secondary air inlet 31 is less than the sectional area of primary air inlet 21, this makes time air inlet 31
The detection gas mass flows at place are less than the detection gas mass flows at primary air inlet 21, so that entering time air flue 3
Interior detection gas mass flows are small and make the dust entered in time air flue 3 few, and then extend the photo elements in time air flue 3
Part is guaranteed the service life of laser class detection of air quality module by the time that dust is completely covered by；Therefore the utility model without
The flow velocity that detection air-flow need to be reduced can make the detection gas mass flows entered in time air flue 3 small just to guarantee laser class sky
The service life of gas quality detection module, the flow velocity without reducing detection air-flow then will not influence laser class Detection of Air Quality
The detection sensitivity and interference free performance of module.And due to the secondary air inlet 31 of the primary air inlet of main airway 2 21 and time air flue 3
It is connected and communicates with the gas outlet 12 of air inlet air flue 1, and the sectional area of the secondary air inlet 31 is less than cutting for primary air inlet 21
Area, this can also make bulky grain of the partial size greater than 10 microns contained in the detection air-flow of air inlet air flue 1 out can be in inertia
It is then exhausted from after entering main airway 2 under effect, it is big greater than 10 microns to enter the partial size contained in the detection air-flow of time air flue 3 in this way
Particle just reduces, and causes to reduce bulky grain of the partial size greater than 10 microns to the detection of laser class detection of air quality module
Interference.
The product form and style of above-described embodiment and schema and non-limiting the utility model, any technical field
The appropriate changes or modifications that those of ordinary skill does it all should be regarded as the patent category for not departing from the utility model.
Claims (10)
1. a kind of air passage structure of laser class detection of air quality module, it is characterised in that: including with air inlet and air outlet
Air inlet air flue, the main airway with primary air inlet and main gas outlet and the secondary air flue with secondary air inlet and secondary gas outlet；
The secondary air flue is used to accommodate the photoelectric cell of laser class detection of air quality module, offers on the secondary air flue side wall mutually
The incidence hole and light hole of face；The gas outlet of the secondary air inlet and air inlet air flue of the primary air inlet of the main airway and time air flue
It is connected and communicates, the sectional area of the secondary air inlet is less than the sectional area of primary air inlet.
2. a kind of air passage structure of laser class detection of air quality module as described in claim 1, it is characterised in that: described time
The sectional area of air inlet is the 10% ~ 30% of the sectional area of primary air inlet.
3. a kind of air passage structure of laser class detection of air quality module as claimed in claim 1 or 2, it is characterised in that: institute
The secondary gas outlet for stating time air flue is provided on main airway side wall, and the sectional area of secondary gas outlet is less than the sectional area of primary air inlet.
4. a kind of air passage structure of laser class detection of air quality module as claimed in claim 3, it is characterised in that: described time
The sectional area of gas outlet is the 10% ~ 30% of the sectional area of primary air inlet.
5. a kind of air passage structure of laser class detection of air quality module as described in claim 1, it is characterised in that: it is described enter
Unthreaded hole outer end is connected with the accommodating cavity for fixed laser module；The light hole outer end is fallen into the absorption for absorbing laser
It is connected.
6. a kind of air passage structure of laser class detection of air quality module as described in claim 1, it is characterised in that: it is described go out
The outgassing direction of port is identical as the airintake direction of the primary air inlet.
7. a kind of air passage structure of laser class detection of air quality module as described in claim 1 or 6, it is characterised in that: institute
Stating the first angle formed by the outgassing direction of main gas outlet and the airintake direction of the secondary air inlet is right angle or obtuse angle.
8. a kind of air passage structure of laser class detection of air quality module as described in claim 1, it is characterised in that: it is described go out
The outgassing direction of port is vertical with the airintake direction of the primary air inlet.
9. a kind of air passage structure of laser class detection of air quality module as claimed in claim 1 or 8, it is characterised in that: institute
The outgassing direction for stating gas outlet is identical as the airintake direction of the secondary air inlet.
10. a kind of air passage structure of laser class detection of air quality module as claimed in claim 1 or 8, it is characterised in that: institute
Stating the first angle formed by the outgassing direction of main gas outlet and the airintake direction of the secondary air inlet is obtuse angle, the gas outlet
Second angle formed by the airintake direction of outgassing direction and the secondary air inlet is acute angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822092260.2U CN209446426U (en) | 2018-12-13 | 2018-12-13 | A kind of air passage structure of laser class detection of air quality module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822092260.2U CN209446426U (en) | 2018-12-13 | 2018-12-13 | A kind of air passage structure of laser class detection of air quality module |
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| CN209446426U true CN209446426U (en) | 2019-09-27 |
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| CN201822092260.2U Active CN209446426U (en) | 2018-12-13 | 2018-12-13 | A kind of air passage structure of laser class detection of air quality module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444010A (en) * | 2018-12-13 | 2019-03-08 | 美时美克(上海)汽车电子有限公司 | A kind of air passage structure of laser class detection of air quality module |
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2018
- 2018-12-13 CN CN201822092260.2U patent/CN209446426U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444010A (en) * | 2018-12-13 | 2019-03-08 | 美时美克(上海)汽车电子有限公司 | A kind of air passage structure of laser class detection of air quality module |
| WO2020119613A1 (en) * | 2018-12-13 | 2020-06-18 | 美时美克(上海)汽车电子有限公司 | Air passage structure for laser-type air quality monitoring module |
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