CN210571842U - Dust detection device and cavity structure thereof - Google Patents
Dust detection device and cavity structure thereof Download PDFInfo
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- CN210571842U CN210571842U CN201921301113.XU CN201921301113U CN210571842U CN 210571842 U CN210571842 U CN 210571842U CN 201921301113 U CN201921301113 U CN 201921301113U CN 210571842 U CN210571842 U CN 210571842U
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Abstract
The application provides a dust detection device and a cavity structure thereof, wherein the cavity structure of the dust detection device comprises an installation bottom plate, an outer peripheral plate arranged on the periphery of the installation bottom plate and a first partition plate arranged inside the installation bottom plate; the mounting bottom plate is provided with a mounting notch for mounting the pneumatic component; the first partition plate and part of the peripheral plate are enclosed to form a dust detection area, a first ventilation notch is formed in the mounting bottom plate adjacent to the dust detection area, and the mounting notch and the first ventilation notch are respectively arranged on two different sides of the dust detection area; the peripheral plate is provided with a second ventilation notch and a third ventilation notch which are mutually independent. The cavity structure of the dust detection device can be adapted to installation of various pneumatic components.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of dust detection, in particular to a dust detection device and a cavity structure thereof.
[ background of the invention ]
The dust detection device is widely applied to products such as air fresheners, air purifiers, air conditioners, ventilation equipment, environment monitoring equipment and the like. The dust detection device is generally provided with a pneumatic component to drive the air in the installation box body to flow, so that the air flow is guided.
The pneumatic components of the dust detection device are usually blowers or fans, and because the working modes of the blowers and the fans are different, the mounting structures of the dust detection devices corresponding to the two pneumatic components are generally different. In the prior art, the dust detection device is generally only provided with the fan in an adaptive mode, or the air blower is only provided with the air blower in an adaptive mode, when an enterprise needs to produce the air blower type dust detection device and the fan type dust detection device, the dust detection device can be produced only by adopting two different installation structures, and the manufacturing cost is high.
[ Utility model ] content
An object of this application is to provide a dust detection device of multiple pneumatic component of adaptation and cavity structures thereof.
In order to achieve the purpose, the technical scheme is as follows:
a cavity structure of a dust detection device comprises an installation bottom plate, an outer peripheral plate arranged on the periphery of the installation bottom plate and a first partition plate arranged inside the installation bottom plate; the mounting bottom plate is provided with a mounting notch for mounting the pneumatic component; the first partition plate and part of the peripheral plate are enclosed to form a dust detection area, a first ventilation notch is formed in the mounting bottom plate adjacent to the dust detection area, and the mounting notch and the first ventilation notch are respectively arranged on two different sides of the dust detection area; the peripheral plate is provided with a second ventilation notch and a third ventilation notch which are mutually independent.
Preferably, the first partition plate, a part of the peripheral plate and the mounting base plate enclose to form a longitudinally long dust detection area, and the first partition plate at the position of the dust detection area close to the first ventilation notch is provided with a group of opposite dust passage openings along the longitudinal direction perpendicular to the dust detection area.
Preferably, the mounting notch is arranged on the side edge of the dust detection area in the longitudinal direction.
Preferably, the mounting notch is arranged at the intersection of two adjacent peripheral plates.
Preferably, the dust detection area is arranged along the edge of a first peripheral plate in the peripheral plates, and the second ventilation notch and the third ventilation notch are arranged on a second peripheral plate opposite to the first peripheral plate.
Preferably, the second ventilation notch is close to the dust passage opening, and the third ventilation notch is close to the installation notch.
Preferably, a fourth ventilation notch is formed in the position, far away from the installation notch, of the installation bottom plate.
Preferably, the periphery of the fourth ventilation notch is provided with a second enclosed partition plate.
The application also provides a dust detection device, which is characterized in that the dust detection device adopts the cavity structure.
Preferably, including locating the dust detection subassembly of dust detection zone and locating the pnematic subassembly of installation breach.
Preferably, the pneumatic assembly is an axial fan.
Preferably, the pneumatic component is a blower, and an air outlet of the blower is communicated with the third ventilation notch.
Compared with the prior art, the method has the following advantages:
1. the utility model provides a dust detection device's cavity structures, through to the dust detection area, the installation breach of installation pnematic subassembly, first ventilation breach, second ventilation breach and third ventilation breach carry out rational arrangement, in particular, form the dust detection area through partial peripheral plate and first division board, and establish first ventilation breach in the neighbouring dust detection area department of mounting plate, establish installation breach and first ventilation breach in the different both sides of dust detection area, and simultaneously, second ventilation breach and third ventilation breach are seted up to the peripheral plate, the inside air current of not only having guaranteed dust detection device's cavity structures flows to the installation breach from the dust detection area, discharge through the installation breach, but also guaranteed that dust detection device's cavity structures can adapt to the installation in multiple pnematic subassembly.
2. This application dust detection device's cavity structures sets up a set of dust passway mouth through the first division board that closes on first ventilation breach department at the dust detection zone, is favorable to guaranteeing that the inside wind of dust detection device's cavity structures flows out the back from first ventilation breach department, flows to the direction of installation breach from the direction in dust detection zone smoothly.
3. This application dust detection device's cavity structures, the setting of second ventilation breach is closing on dust passageway mouth department, the setting of third ventilation breach is closing on installation breach department to guarantee that the second ventilation breach is close to dust detection device's cavity structures's air intake department and lays, the air outlet department that the third ventilation breach is close to dust detection device's cavity structures lays, thereby is favorable to realizing the effective control of the inside air current of air-blower formula dust detection device.
4. This application dust detection device's cavity structures, mounting plate keeps away from installation breach department is equipped with fourth ventilation breach, is favorable to wind to get into the cavity structures from the outside after, gets into the dust access opening through the fourth ventilation breach, and avoids wind to get into cavity structures from the outside after directly arriving at pnematic subassembly and can not arrive at the dust detection zone.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a cavity structure of a dust detection device according to the present application;
FIG. 2 is a schematic top-level structure diagram of a cavity structure of the dust detection device shown in FIG. 1;
FIG. 3 is a schematic structural view of an embodiment of a dust detection apparatus of the present application;
fig. 4 is a schematic structural diagram of another embodiment of a dust detection device according to the present application.
[ detailed description ] embodiments
The present application is further described with reference to the following drawings and exemplary embodiments, wherein like reference numerals are used to refer to like elements throughout. In addition, if a detailed description of the known art is not necessary to show the features of the present application, it is omitted.
The cavity structure of the dust detection device is a cavity structure which is used for accommodating dust detection equipment and a pneumatic component inside the dust detection device, is provided with an airflow guide structural member, a vent and other structures, and enables the pneumatic component to be started to control gas to flow along a certain direction so that dust in the gas can pass through the dust detection equipment.
Referring to fig. 1, the present application provides a cavity structure of a dust detection device, including a mounting base plate 11, a peripheral plate 12 disposed at the periphery of the mounting base plate 11, and a first partition plate 13 disposed inside the mounting base plate 11; the mounting bottom plate 11 is provided with a mounting notch 111 for mounting the pneumatic component; the first partition plate 13 and part of the peripheral plate 12 enclose to form a dust detection area 14, a first ventilation notch 112 is formed on the mounting bottom plate 11 adjacent to the dust detection area 14, and the mounting notch 111 and the first ventilation notch 112 are respectively arranged on two different sides of the dust detection area 14; the peripheral plate 12 is provided with a second ventilation notch 121 and a third ventilation notch 122 which are independent of each other.
In practical application, the air outlet of the dust detection device is generally arranged at a place other than the bottom of the dust detection device, so as to ensure a sufficient exhaust space. In order to combine the dust detection device's the actual application condition, describe the dust detection device's of this application cavity structure, combine fig. 2, divide into relative upper strata and lower floor with the dust detection device's of this application cavity structure, with mounting plate 11 is the boundary, installs the cavity of first division board 13 one side is the lower floor, and the cavity that corresponds with the lower floor is the upper strata.
In order to meet the requirement of guiding the air flow inside the chamber structure, the first partition plate 13 and part of the peripheral plate 12 enclose to form a dust detection area 14. Further, the dust detection area 14 is preferably elongated in shape to meet the installation requirements of the dust detection apparatus. Specifically, the dust detection area 14 is arranged along the peripheral plate edge in the peripheral plate 12, a part of the peripheral plate 12 and a first sub-partition plate (not labeled) formed by the peripheral plate 12 and a first sub-partition plate 13 extending towards the inside of the cavity structure, the first sub-partition plate and a second sub-partition plate (not labeled) extending towards the inside of the cavity structure from the peripheral plate 12 and parallel to the first sub-partition plate jointly define the dust detection area 14, and the dust detection area 14 formed by the enclosure has a certain air flow blocking effect, and can reduce the internal air flow from the dust detection area 14 to directly flow to the installation notch 111 and be discharged through the installation notch 111.
The first partition plate 13 of the dust detection area 14 near the first ventilation notch 112 is provided with a set of opposite dust passage openings 131 along a direction perpendicular to the longitudinal direction of the dust detection area 14. The dust channel openings 131 are a set of opposite channels respectively formed in the middle or the edge of the first sub-partition plate and the second sub-partition plate, and the channels may be in a polygonal shape such as a circle or a square. Preferably, the channel direction formed by the group of dust channel openings 131 is inclined along the direction of the mounting notch 111, so as to ensure that the airflow can smoothly flow from the dust detection area 14 to the mounting notch 111 after passing through the dust channel openings 131, and reach the mounting notch 111.
The first ventilation notch 112 is disposed on the mounting base 11 adjacent to the dust detection area 14 as a ventilation opening for controlling the air flow direction, and preferably, the first ventilation notch 112 is disposed adjacent to the dust passage opening 131. The shape of the first ventilation notch 112 is preferably a long oval arc shape or a polygonal shape. In one embodiment of the present application, the first ventilation notch 112 is disposed at the outer edge of the mounting base plate 11, and the edge of the first ventilation notch 112 is enclosed by the peripheral plate 12, the mounting base plate 11, and the first partition plate 13 provided with the dust passage opening 131, so that the airflow smoothly enters the dust detection area 14 through the dust passage opening 131 after passing through the first ventilation notch 112.
The mounting notch 111 and the first ventilation notch 112 are respectively disposed at two different sides of the dust detection area 14, the mounting notch 111 is disposed at a side of the dust detection area 14 in the longitudinal direction, specifically, the mounting notch 111 is disposed at a side of the dust detection area 14 in the longitudinal direction far away from the dust passage opening 131, and the first ventilation notch 112 is disposed on the mounting bottom plate 11 adjacent to the dust passage opening 131. In order to adapt to different shapes of dust detection devices, the peripheral plates 12 and the mounting base plates 11 enclosed by the peripheral plates 12 may be circular or polygonal such as rectangular, taking the shape of the mounting base plates 11 enclosed by the peripheral plates 12 as a rectangle as an example, the mounting notches 111 are arranged at the corners where two adjacent peripheral plates 12 intersect, and the first ventilation notches 112 are arranged at the opposite corners of the mounting notches 111, so as to ensure the distance between the mounting notches 111 and the first ventilation notches 112 to the maximum extent and ensure that the mounting notches 111 are far away from the dust channel opening 131.
Further, the second ventilation notch 121 and the third ventilation notch 122 are opened at one side of the peripheral plate 12 close to the upper layer of the cavity structure of the dust detection device. Taking the dust detection area 14 as an example, the second ventilation notch 121 and the third ventilation notch 122 are provided on a second peripheral plate opposite to the first peripheral plate, along the edge of the first peripheral plate in the peripheral plate 12. Second ventilation breach 121 and third ventilation breach 122 locate with on the relative second peripheral board of first peripheral board, just second ventilation breach 121 closes on one side of dust passage mouth 131, third ventilation breach 122 closes on one side of installation breach 111 to guarantee that second ventilation breach 121 is close to the air intake department of dust detection device's cavity structures and lay, third ventilation breach 122 is close to the air outlet department of dust detection device's cavity structures and lays, thereby is favorable to realizing the effective control of the inside air current of air-blower formula dust detection device.
Further, a fourth ventilation notch 113 for penetrating through the upper layer and the lower layer of the cavity structure of the dust detection device is arranged at a position, far away from the installation notch 111, of the installation bottom plate 11. The surrounding second partition plate 15 is arranged around the fourth ventilation notch 113, and the surrounding height of the second partition plate 15 can be lower than that of the first partition plate 13, so that gas can diffuse to the dust detection area 14, and can also be higher than that of the first partition plate 13, so that diffusion of gas to the installation notch 111 is reduced. In order to simplify the installation of the cavity structure of the dust detection device, the height of the second partition plate 15 may be set to be flush with the height of the first partition plate 13, and the diffusion of the gas in the direction of the installation notch 111 may be reduced by providing another barrier between the second partition plate 15 and the installation notch 111. In an embodiment of this application, fourth ventilation breach 113 is all around second division board 15 highly can also be established to the inequality, is close to promptly the height of installation breach 111 department is higher than and is close to the height of dust detection zone 14 is close to in order to realize being close to the air current separation of installation breach 111 side avoids wind to directly arrive at pneumatic component and can not arrive dust detection zone 14 after getting into cavity structures from the outside, guarantees the air current guide of dust detection zone 14 one side simultaneously.
Further, this application dust detection device's cavity structures is still including locating a plurality of mounting structure 16 that are used for being connected with the shell on the mounting plate 11, and locate for spacing at least a set of locating part 17 on the mounting plate 11.
The airflow flowing condition of the cavity structure of the dust detection device of the present application is described below.
1. The axial flow fan is installed in the installation notch 111, an air outlet of the axial flow fan faces the upper layer, and an air inlet of the axial flow fan faces the lower layer of the cavity structure of the dust detection device. The cavity structure of the dust detection device is not provided with the fourth ventilation notch 113, and the external air enters the upper layer of the cavity structure of the dust detection device from the position close to the first ventilation notch 112, due to the air pressure difference generated by the axial flow fan, the air flow enters the lower layer of the cavity structure through the first ventilation notch 112, flows through the dust channel port 131, reaches the installation notch 111 provided with the axial flow fan, is pumped to the upper layer of the cavity structure from the lower layer of the cavity structure through the air inlet of the axial flow fan, and is discharged from the air outlet of the axial flow fan.
2. The axial flow fan is installed in the installation notch 111, an air outlet of the axial flow fan faces the upper layer, and an air inlet of the axial flow fan faces the lower layer of the cavity structure of the dust detection device. The cavity structure of the dust detection device is simultaneously provided with a first ventilation notch 112 and a fourth ventilation notch 113, and external air enters the upper layer of the cavity structure of the dust detection device from the position close to the fourth ventilation notch 113, so that air flow enters the lower layer of the cavity structure through the fourth ventilation notch 113 under the condition that an axial flow fan generates a certain air pressure difference.
The air flow entering the lower layer of the cavity structure through the fourth ventilation notch 113 flows through the dust channel port 131 through the second partition plate 15, and is then drawn out from the lower layer of the cavity structure to the upper layer of the cavity structure through the air inlet of the axial flow fan and discharged from the air outlet of the axial flow fan.
3. The axial flow fan is installed in the installation notch 111, an air outlet of the axial flow fan faces the upper layer, and an air inlet of the axial flow fan faces the lower layer of the cavity structure of the dust detection device. The cavity structure of the dust detection device is simultaneously provided with a first ventilation notch 112 and a fourth ventilation notch 113, and external air enters the upper layer of the cavity structure of the dust detection device from the position close to the fourth ventilation notch 113, so that air flow enters the lower layer of the cavity structure through the fourth ventilation notch 113 and the first ventilation notch 112 respectively under the condition that an axial flow fan generates a certain air pressure difference.
Wherein, the air flow entering the lower layer of the cavity structure through the first ventilation notch 112 flows through the dust channel port 131 and reaches the installation notch 111 where the axial flow fan is installed, and then is pumped from the lower layer of the cavity structure to the upper layer of the cavity structure through the air inlet of the axial flow fan and is discharged from the air outlet of the axial flow fan;
the air flow entering the lower layer of the cavity structure through the fourth ventilation notch 113 flows through the dust channel port 131 through the second partition plate 15, and is then drawn out from the lower layer of the cavity structure to the upper layer of the cavity structure through the air inlet of the axial flow fan and discharged from the air outlet of the axial flow fan.
4. The air blower is installed in the installation notch 111, an air outlet of the air blower faces the third ventilation notch 122, and an air inlet faces the lower layer of the cavity structure of the dust detection device. The fourth ventilation notch 113 is not installed on the cavity structure of the dust detection device, and the external air enters the upper layer of the cavity structure of the dust detection device from the second ventilation notch 121, due to the air pressure difference generated by the blower, the air flow enters the lower layer of the cavity structure through the first ventilation notch 112, flows through the dust passage port 131, reaches the installation notch 111 where the blower is installed, is then drawn out to the air outlet of the blower from the lower layer of the cavity structure through the air inlet of the blower, and is discharged from the third ventilation notch 122.
5. The air blower is installed in the installation notch 111, an air outlet of the air blower faces the third ventilation notch 122, and an air inlet faces the lower layer of the cavity structure of the dust detection device. The first ventilation notch 112 and the fourth ventilation notch 113 are simultaneously installed on the cavity structure of the dust detection device, and external air enters the upper layer of the cavity structure of the dust detection device from the position close to the fourth ventilation notch 113, so that air flow enters the lower layer of the cavity structure through the fourth ventilation notch 113 under the condition that a blower generates a certain air pressure difference.
The airflow entering the lower layer of the cavity structure through the fourth ventilation notch 113 flows through the dust channel opening 131 through the second partition plate 15, and is then drawn from the lower layer of the cavity structure to the air outlet of the blower through the air inlet of the blower, and is discharged through the third ventilation notch 122.
6. The air blower is installed in the installation notch 111, an air outlet of the air blower faces the third ventilation notch 122, and an air inlet faces the lower layer of the cavity structure of the dust detection device. The first ventilation notch 112 and the fourth ventilation notch 113 are simultaneously installed on the cavity structure of the dust detection device, and external air enters the upper layer of the cavity structure of the dust detection device from the position close to the fourth ventilation notch 113, so that air flow enters the lower layer of the cavity structure through the fourth ventilation notch 113 and the first ventilation notch 112 respectively under the condition that a blower generates a certain air pressure difference.
Wherein, the air flow entering the lower layer of the cavity structure through the first ventilation notch 112 flows through the dust passage port 131 and reaches the installation notch 111 where the blower is installed, and then is pumped from the lower layer of the cavity structure to the air outlet of the blower through the air inlet of the blower and discharged from the third ventilation notch 122;
the air flow entering the lower layer of the cavity structure through the fourth ventilation notch 113 flows through the dust passage opening 131 through the second partition plate 15, and is then drawn out from the lower layer of the cavity structure to the air outlet of the blower through the air inlet of the blower, and is discharged through the third ventilation notch 122.
The cavity structure of the dust detection device is characterized in that the dust detection area 14, the installation notch 111 for installing the pneumatic component, the first ventilation notch 112, the second ventilation notch 121 and the third ventilation notch 122 are reasonably arranged, specifically, a dust detection area 14 is formed by the mounting base plate 11, a part of the peripheral plate 12 and the first partition plate 13, a first ventilation notch 112 is formed at a position of the mounting base plate 11 adjacent to the dust detection area 14, the mounting notch 111 and the first ventilation notch 112 are formed at two different sides of the dust detection area 14, and at the same time, the second ventilation notch 121 and the third ventilation notch 122 are formed in the outer panel 12, so that the internal airflow of the cavity structure of the dust detection device is ensured to flow from the dust detection area 14 to the installation notch 111 and be discharged through the installation notch 111, but also ensures that the cavity structure of the dust detection device can be adapted to the installation of various pneumatic components.
The application also provides a dust detection device, and the dust detection device adopts the cavity structure.
The dust detection device includes a dust detection component (not shown) disposed in the dust detection region 14 and a pneumatic component (not shown) disposed in the mounting notch 111.
When the pneumatic component is an axial flow fan, the dust detection device is an axial flow fan type dust detection device, namely the axial flow fan is used as the dust detection device of the pneumatic component.
Axial flow fans are represented by axial flow fans, and the airflow of the axial flow fans is in the same direction as the axis of fan blades of the fan, and generally shows that the air enters and exits along the same axial direction. In the scheme of this application, install axial fan at installation breach 111 department to make axial fan's air intake towards the cavity structure's of dust detection device below, axial fan's air outlet is towards the cavity structure upper strata of dust detection device, in order to realize the reasonable flow of the inside air current of dust detection device.
Specifically, referring to fig. 3, the axial flow fan dust detection device further includes a first housing 21, and a cavity structure of the axial flow fan dust detection device is limited in the first housing 21; the first housing 21 is provided with a first housing air outlet 211 corresponding to the air outlet of the axial flow fan, the first housing 21 is provided with a first housing air inlet 212 near the fourth air inlet 113, and the first housing air inlet 212 is adjacent to the first housing air outlet 211.
When pneumatic component is the air-blower, be air-blower formula dust detection device, under general condition, the air-blower is the below and admits air, and the side is given vent to anger. In one embodiment of the present application, the air outlet of the blower communicates with the third ventilation notch 122.
Specifically, referring to fig. 4, the blower-type dust detection device further includes a second housing 31, and the cavity structure of the dust detection device is confined in the second housing 31; the air outlet of the blower faces the third ventilation gap 122, a second housing air inlet 311 is arranged at the position of the second housing 31 corresponding to the second ventilation gap 121, and a second housing air outlet 312 is arranged at the position of the second housing 31 corresponding to the third ventilation gap 122.
This application dust detection device's cavity structures can enough be adapted in axial fan formula dust detection device's installation, can adapt air-blower formula dust detection device's installation again, greatly reduced dust detection device's installation cost, have extensive practicality.
Although a few exemplary embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the principles and spirit of the application, the scope of which is defined in the claims and their equivalents.
Claims (12)
1. The utility model provides a dust detection device's cavity structures which characterized in that: the device comprises a mounting bottom plate, a peripheral plate arranged on the periphery of the mounting bottom plate and a first partition plate arranged in the mounting bottom plate; the mounting bottom plate is provided with a mounting notch for mounting the pneumatic component; the first partition plate and part of the peripheral plate are enclosed to form a dust detection area, a first ventilation notch is formed in the mounting bottom plate adjacent to the dust detection area, and the mounting notch and the first ventilation notch are respectively arranged on two different sides of the dust detection area; the peripheral plate is provided with a second ventilation notch and a third ventilation notch which are mutually independent.
2. The cavity structure of the dust detection device of claim 1, wherein: first division board, partial peripheral board with the mounting plate encloses to close and closes the dust detection area that forms the longitudinal and elongation type, the dust detection area approaches to the first division board of first ventilation breach department, along the perpendicular to the dust detection area lengthwise direction has seted up a set of relative dust passway mouth.
3. The cavity structure of the dust detection device of claim 2, wherein: the mounting notch is arranged on the side edge of the dust detection area in the longitudinal direction.
4. The cavity structure of the dust detection device of claim 1, wherein: the mounting gap is arranged at the intersection of two adjacent peripheral plates.
5. The cavity structure of the dust detection device of claim 2, wherein: the dust detection area is arranged along the edge of a first peripheral plate in the peripheral plates, and the second ventilation notch and the third ventilation notch are arranged on a second peripheral plate opposite to the first peripheral plate.
6. The cavity structure of the dust detection device of claim 2, wherein: the second ventilation notch is close to the dust channel opening, and the third ventilation notch is close to the installation notch.
7. The cavity structure of the dust detection device of claim 6, wherein: and a fourth ventilation notch is arranged at the position, far away from the installation notch, of the installation bottom plate.
8. The cavity structure of the dust detection device of claim 7, wherein: and the surrounding second partition plates are arranged around the fourth ventilation notch.
9. A dust detection device, characterized in that it employs the cavity structure of the dust detection device according to any one of claims 1 to 8.
10. A dust detecting device according to claim 9, wherein: including locating the dust detection subassembly of dust detection zone and locating the pnematic subassembly of installation breach.
11. A dust detecting device according to claim 9, wherein: the pneumatic component is an axial flow fan.
12. A dust detecting device according to claim 9, wherein: the pneumatic component is an air blower, and an air outlet of the air blower is communicated with the third ventilation notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301113.XU CN210571842U (en) | 2019-08-09 | 2019-08-09 | Dust detection device and cavity structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301113.XU CN210571842U (en) | 2019-08-09 | 2019-08-09 | Dust detection device and cavity structure thereof |
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| Publication Number | Publication Date |
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| CN210571842U true CN210571842U (en) | 2020-05-19 |
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| CN201921301113.XU Active CN210571842U (en) | 2019-08-09 | 2019-08-09 | Dust detection device and cavity structure thereof |
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| CN (1) | CN210571842U (en) |
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- 2019-08-09 CN CN201921301113.XU patent/CN210571842U/en active Active
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