CN207894822U - A kind of sensor of dust concentration - Google Patents
A kind of sensor of dust concentration Download PDFInfo
- Publication number
- CN207894822U CN207894822U CN201820206296.6U CN201820206296U CN207894822U CN 207894822 U CN207894822 U CN 207894822U CN 201820206296 U CN201820206296 U CN 201820206296U CN 207894822 U CN207894822 U CN 207894822U
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- CN
- China
- Prior art keywords
- air duct
- box body
- sensor
- air
- dust concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a kind of sensor of dust concentration, including box body and dust detection module, dust detection module includes detection zone, the circuit board that its inner cavity is separated into first layer and the second layer is equipped in box body, box body is equipped with the air inlet being sequentially communicated along gas flow, first air duct, second air duct, third air duct, 4th air duct and air outlet, the air inlet and air outlet are located on the same side wall of box body first layer, second air duct and the 4th air duct are located at the box body second layer and first layer, detection zone is located in the 4th air duct, fan is equipped in 4th air duct.Sensor of dust concentration provided by the utility model can pass through the upper and lower surface of circuit board into the air in box body, take away more heats on circuit board, to extend the service life of sensor, improve continuous work ability.
Description
Technical field
The utility model is related to dust concentration testing equipment field more particularly to a kind of sensor of dust concentration.
Background technology
Currently, being to be realized by dust detector, and dust is detected to the detection of dust in air concentration (such as PM2.5)
Sensor is the critical piece in dust detector.One-to-one laser head and opto-electronic receiver are equipped in dust detection sensor
Dust in air mass concentration is detected using light scattering method in the Laser emission end of device, laser head towards photelectric receiver.Dust is dense
Spend sensor in, calorific value it is larger be circuit board, but in current sensor of dust concentration circuit board heat radiation energy force difference, even
Circuit element is easy failure when continuous work, leads to that the service life of sensor of dust concentration is low, continuous work energy force difference.
Utility model content
The purpose of this utility model is to provide a kind of sensor of dust concentration, can pass through circuit board into the air in box body
Upper and lower surface, take away more heats on circuit board, to extend the service life of sensor, improve continuous work ability.
To achieve the above object, the utility model provides a kind of sensor of dust concentration, including box body and dust detect mould
Block, dust detection module include detection zone, and the circuit board that its inner cavity is separated into first layer and the second layer, box body are equipped in box body
It is equipped with air inlet, the first air duct, the second air duct, third air duct, the 4th air duct and the air outlet being sequentially communicated along gas flow,
The air inlet and air outlet are located on the same side wall of box body first layer, and second air duct and the 4th air duct are located at box
The body second layer and first layer, detection zone are located in the 4th air duct, and fan is equipped in the 4th air duct.
The connectivity part in first air duct and the second air duct is located at the air inlet as a further improvement of the utility model,
The side of box side wall where mouthful, second air duct is located at the box side wall opposite with air inlet with the connectivity part in third air duct
Side.
As the further improvement of the utility model, the sectional area in the 4th air duct gradually increases along gas flow direction
Greatly.
As the further improvement of the utility model, the fan is located at the 4th duct cross-section and accumulates larger one
Point.
As the further improvement of the utility model, the dust detection module includes pedestal, and the detection zone is located at
In the middle part of pedestal and in the groove-like of lateral direction penetrating, the side that detection zone is located on pedestal is equipped with laser head, and the other side is equipped with normal
The bottom of the direction reflecting surface at an acute angle with the angle in the laser irradiation direction of the laser head, detection zone is equipped with opto-electronic receiver
Device.
As the further improvement of the utility model, the wall body of the box body is equipped with clean window, the clean window
It is equipped with capping, the photelectric receiver for being located at the detection zone bottom is opposite with the clean window.
As the further improvement of the utility model, the fan includes shell and flabellum, and the flabellum is located at shell
Interior, circuit board is equipped with notch compatible with housing sidewall.
As the further improvement of the utility model, the circuit board, which is equipped with, can be exposed to the external wiring of box wall
Mouthful.
Advantageous effect
Compared with prior art, the advantages of sensor of dust concentration of the utility model, is：
1, enter the first air duct and the second air duct that the air of box body passes through circuit board both sides successively from air inlet, and fan
Negative pressure can be formed in box body and is detected and accelerates the speed air flow in box body to suck air, further carried
The heat dissipation effect of high circuit board, the more heats taken away on circuit board carry to extend the service life of sensor of dust concentration
Its high continuous work ability；
2, the first air duct is located remotely from each other with the connectivity part in the second air duct and the connectivity part in the second air duct and third air duct, outlet air
Mouthful be also located remotely from each other with the connectivity part in the second air duct and third air duct, to increase into the air in box body the second air duct with
Residence time in 4th air duct keeps the partial air more abundant to the endothermic effect of circuit board；
3, the photelectric receiver of detection zone bottom is opposite with clean window, after long-time service, the photoelectricity on detection zone
Receiver surface can remain more dust, reduce the accuracy of detection, at this time stretch into opto-electronic receiver cotton swab in clean window
It wipes clean on device surface, you can ensure the accuracy of detection；
4, circuit board is equipped with notch compatible with blower-casting side wall, then the fan in box body and both circuit boards
Whole height is reduced, and the height of box body is allowed to become smaller, and reduces the volume of sensor of dust concentration.
By description below and in conjunction with attached drawing, the utility model will become more fully apparent, these attached drawings are for explaining this
The embodiment of utility model.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the stereogram of sensor of dust concentration；
Fig. 2 is the rearview of sensor of dust concentration；
Fig. 3 is the upward view of sensor of dust concentration；
Fig. 4 is the vertical view of sensor of dust concentration；
Fig. 5 is the A-A direction views in Fig. 4；
Fig. 6 is the vertical view that sensor of dust concentration removes lid；
Fig. 7 is the 4th air channel structure vertical view of sensor of dust concentration；
Fig. 8 is the front view of dust detection module；
Fig. 9 is the upward view of dust detection module；
Figure 10 is the explosive view of sensor of dust concentration.
Specific implementation mode
The embodiments of the present invention are described referring now to the drawings.
Embodiment
Specific embodiment of the present utility model is as shown in Figures 1 to 5, a kind of sensor of dust concentration, including 1 He of box body
Dust detection module 4, dust detection module 4 include detection zone 43, are equipped in box body 1 its inner cavity being separated into first layer and second
The circuit board 5 of layer, box body 1 are equipped with air inlet 2, the first air duct 7, the second air duct 8, the third wind being sequentially communicated along gas flow
Road 9, the 4th air duct 10 and air outlet 3, the air inlet 2 and air outlet 3 are located on the same side wall of 1 first layer of box body, described
Second air duct 8 and the 4th air duct 10 are located at 1 second layer of box body and first layer, and detection zone 43 is located in the 4th air duct 10, the
It is equipped with fan 6 in four air ducts 10.Box body 1 includes lower box body 12 and lid 11.Circuit board 5 is located in lower box body 12.
The connectivity part in first air duct, 7 and second air duct 8 is located at the side of 2 place box body of the air inlet, 1 side wall, institute
It states the second air duct 8 and is located at the box body 1 side wall side opposite with air inlet 2 with the connectivity part in third air duct 9.First air duct 7 and
Three air ducts 9 are made up of the guide plate in lower box body 12.
The sectional area in the 4th air duct 10 gradually increases along gas flow direction.
The fan 6 is located at 10 sectional area larger portion of the 4th air duct.
The dust detection module 4 includes pedestal 41, and the detection zone 43 is located at 41 middle part of pedestal and in lateral direction penetrating
Groove-like, the side that detection zone 43 is located on pedestal 41 are equipped with laser head 42, and the other side is equipped with normal direction and the laser head
The bottom of the angle in 42 laser irradiation direction reflecting surface 45 at an acute angle, detection zone 43 is equipped with photelectric receiver 44.Reflecting surface
45 by the laser reflection of detection zone 43 to other directions for that will avoid laser from influencing photelectric receiver 44 because of backtracking
Accuracy of detection.
In the present embodiment, detection zone 43 is located at the connectivity part in the 4th air duct 10 and third air duct 9.
The wall body of the box body 1 is equipped with clean window 13, which is equipped with capping, is located at the detection zone
The photelectric receiver 44 of 43 bottoms is opposite with the clean window 13.Sensor of dust concentration after long-term use, detection zone 43
On 44 surface of photelectric receiver can remain more dust, reduce the accuracy of detection, cotton swab stretched into clean window 13 at this time
It is interior to wipe clean 44 surface of photelectric receiver, you can to ensure the accuracy of detection.
The fan 6 includes shell 61 and flabellum 62, and the flabellum 62 is located in shell 61, and circuit board 5 is equipped with and shell
The compatible notch of 61 side wall of body 52.When installation, the notch 52 on circuit board 5 is set to be in contact with the side wall of shell 61, to drop
The low mounting height of circuit board 5.
The circuit board 5 is equipped with the connection jaws 51 that can be exposed to outside 1 wall body of box body.
In use, fan 6 works, flabellum 62 rotates, and negative pressure is formed in box body, to by extraneous air from air inlet
It is sucked in box body 1 at 2.Air passes through air inlet 2, the first air duct 7, the second air duct 8, third air duct 9, dust detection module successively
4 detection zone 43, and be detected by dust detection module 4 in detection zone 43, then air passes through the 4th air duct successively again
10 and air outlet 3, external environment is flowed out to again.
The utility model is described above in association with most preferred embodiment, but the utility model is not limited to above take off
The embodiment shown, and modification, equivalent combinations that various essence according to the present utility model carry out should be covered.
Claims (8)
1. a kind of sensor of dust concentration, including box body (1) and dust detection module (4), dust detection module (4) includes detection
Area (43), which is characterized in that the circuit board (5) that its inner cavity is separated into first layer and the second layer, box body are equipped in box body (1)
(1) air inlet (2) being sequentially communicated along gas flow, the first air duct (7), the second air duct (8), third air duct (9), the are equipped with
Four air ducts (10) and air outlet (3), the air inlet (2) and air outlet (3) are located on the same side wall of box body (1) first layer,
Second air duct (8) and the 4th air duct (10) are located at box body (1) second layer and first layer, and detection zone (43) is located at the 4th
In air duct (10), fan (6) is equipped in the 4th air duct (10).
2. a kind of sensor of dust concentration according to claim 1, which is characterized in that first air duct (7) and second
The side of box body (1) side wall where the connectivity part in air duct (8) is located at the air inlet (2), second air duct (8) and third wind
The connectivity part in road (9) is located at box body (1) side wall side opposite with air inlet (2).
3. a kind of sensor of dust concentration according to claim 1 or 2, which is characterized in that the 4th air duct (10)
Sectional area gradually increases along gas flow direction.
4. a kind of sensor of dust concentration according to claim 3, which is characterized in that the fan (6) is located at described the
Four air ducts (10) sectional area larger portion.
5. a kind of sensor of dust concentration according to claim 1, which is characterized in that dust detection module (4) packet
Pedestal (41) is included, the detection zone (43) is located in the middle part of pedestal (41) and in the groove-like of lateral direction penetrating, and pedestal is located on (41)
The side of detection zone (43) is equipped with laser head (42), and the other side is equipped with the laser irradiation side of normal direction and the laser head (42)
To angle reflecting surface (45) at an acute angle, the bottom of detection zone (43) is equipped with photelectric receiver (44).
6. a kind of sensor of dust concentration according to claim 5, which is characterized in that set on the wall body of the box body (1)
There is clean window (13), which is equipped with capping, is located at the photelectric receiver of the detection zone (43) bottom
(44) opposite with the clean window (13).
7. a kind of sensor of dust concentration according to claim 5, which is characterized in that the fan (6) includes shell
(61) it is located in shell (61) with flabellum (62), the flabellum (62), circuit board (5) is equipped with and is adapted with shell (61) side wall
Notch (52).
8. a kind of sensor of dust concentration according to claim 1, which is characterized in that the circuit board (5) is equipped with energy
The connection jaws (51) being exposed to outside box body (1) wall body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820206296.6U CN207894822U (en) | 2018-02-06 | 2018-02-06 | A kind of sensor of dust concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820206296.6U CN207894822U (en) | 2018-02-06 | 2018-02-06 | A kind of sensor of dust concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207894822U true CN207894822U (en) | 2018-09-21 |
Family
ID=63543330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820206296.6U Expired - Fee Related CN207894822U (en) | 2018-02-06 | 2018-02-06 | A kind of sensor of dust concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207894822U (en) |
-
2018
- 2018-02-06 CN CN201820206296.6U patent/CN207894822U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180921 Termination date: 20210206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |