CN219065205U - Particle counter - Google Patents
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- CN219065205U CN219065205U CN202320114922.XU CN202320114922U CN219065205U CN 219065205 U CN219065205 U CN 219065205U CN 202320114922 U CN202320114922 U CN 202320114922U CN 219065205 U CN219065205 U CN 219065205U
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Abstract
The utility model discloses a particle counter, comprising: the laser is used for outputting light beams, and the shaping lens group and the scattering cavity are arranged on an optical path formed by light beam transmission; the scattering cavity is provided with an air inlet pipe, an air outlet pipe, a reflecting mirror and a photoelectric detector; the tested air flow flows into the scattering cavity from the air inlet pipe and flows out from the air outlet pipe; the reflecting mirror and the photoelectric detector are respectively used for reflecting and receiving scattered light generated by the irradiation of the light beam incident into the scattering cavity to the detected air flow; the light adjusting component is used for adjusting the relative distance between the laser and the shaping lens group along the light beam transmission direction. The utility model provides a be provided with the subassembly of adjusting luminance can adjust the distance size of distance along the transmission light path direction of light beam between laser instrument and the plastic lens in this application, from this, can make light beam can both modulate reasonable scope in the at utmost at photosensitive region's facula intensity and size through this subassembly of adjusting luminance, and then promotes particle counter's measurement accuracy.
Description
Technical Field
The present utility model relates to the field of particle detection, and in particular, to a particle counter.
Background
A particle counter is an instrument for detecting characteristic parameters such as the particle size of particles, and the particle size of particles is characterized by irradiating the particles with a light beam to form scattered light of the particles, and collecting the scattered light and converting the scattered light into an electrical signal. When the method is used for detecting the metering particles, only one particle to be detected can pass through in the light beam in the same time period in the process of detecting the particles in the airflow to be detected, so that the width of the light beam along the airflow propagation direction of a photosensitive area formed by overlapping the airflow to be detected and the light beam is not easy to be too wide; meanwhile, the particle size of the particles is converted and characterized by utilizing scattered light generated by an excitation light beam, and the light intensity of a photosensitive area of the light beam penetrated by the particles is positively correlated with the size of the scattered light formed by excitation, so that the light spot intensity of the light beam in the photosensitive area also needs to be regulated to a reasonable size.
From the above, various factors such as the width of the light beam in the photosensitive region and the spot intensity affect the accuracy of the particle detection result to some extent. Therefore, how to ensure good and proper optical characteristics of the light beam in the photosensitive area is important in the process of detecting the detected particles by the particle counter.
Disclosure of Invention
The utility model aims to provide a particle counter, which can improve the optical characteristics of a light beam in a photosensitive area to a certain extent and improve the detection precision of the particle counter.
In order to solve the above technical problems, the present utility model provides a particle counter, comprising: the laser is used for outputting light beams, and the shaping lens group and the scattering cavity are arranged on an optical path formed by the light beam transmission; the scattering cavity is provided with an air inlet pipe, an air outlet pipe, a reflecting mirror and a photoelectric detector; the tested air flow flows into the scattering cavity from the air inlet pipe and flows out from the air outlet pipe; the reflecting mirror and the photoelectric detector are respectively used for reflecting and receiving scattered light generated by the light beam which is incident into the scattering cavity and irradiates the tested air flow;
the light adjusting component is connected with the laser and the shaping lens group and used for adjusting the relative distance between the laser and the shaping lens group along the light beam transmission direction.
In an alternative embodiment of the present application, the dimming component comprises an inner sleeve and an outer sleeve;
one end of the outer sleeve is connected with the laser, and the other end of the outer sleeve is connected with the inner sleeve in an interpenetration and sleeving manner, wherein the interpenetration depth of the interpenetration and sleeving manner is adjustable;
one end of the inner sleeve, which is away from the outer sleeve, is connected with the scattering cavity;
the shaping lens group comprises a first lens and a second lens; and the first lens and the second lens are respectively and fixedly arranged at two ends of the inner sleeve.
In an alternative embodiment of the present application, one end of the outer sleeve and one end of the inner sleeve which are mutually sleeved are sleeved on the outer surface of the inner sleeve; the outer sleeve is provided with a limiting screw hole;
when the limit screw hole is internally screwed with a screw propping up the outer surface of the inner sleeve, the relative position between the inner sleeve and the outer sleeve is fixed.
In an alternative embodiment of the present application, the inner sleeve comprises an integrally formed barrel structure and barrel plate structure; the end part of the cylinder structure is connected with the outer sleeve; the cylinder plate structure is connected with the scattering cavity; the second lens is arranged on the cylinder plate structure, a mounting groove is formed in the outer wall of the scattering cavity, opposite to the second lens, and a first elastic rubber ring is arranged in the mounting groove.
In an alternative embodiment of the present application, a second elastic rubber ring is disposed between the cylinder structure and the second lens, and is located on the cylinder structure and abuts against the second lens.
In an alternative embodiment of the present application, the inner walls of the inner sleeve and the outer sleeve are each provided with a black light absorbing layer.
In an alternative embodiment of the present application, the end of the outer sleeve that connects the lasers is provided with a mounting plate; the mounting plate is provided with a mounting hole for fixedly mounting the laser.
In an alternative embodiment of the present application, a front optical path channel and a rear optical path channel extending along an optical path formed by the light beam transmission are arranged on two opposite cavity walls of the scattering cavity, and the rear optical path channel is connected with an optical trap; so that the light beam is incident into the scattering cavity along the front light path channel and is output to the optical trap through the rear light path channel.
In an alternative embodiment of the present application, the inner walls of the front light path channel and the rear light path channel are each provided with a black light absorbing layer.
The utility model provides a particle counter, comprising: the laser is used for outputting light beams, and the shaping lens group and the scattering cavity are arranged on an optical path formed by light beam transmission; the scattering cavity is provided with an air inlet pipe, an air outlet pipe, a reflecting mirror and a photoelectric detector; the tested air flow flows into the scattering cavity from the air inlet pipe and flows out from the air outlet pipe; the reflecting mirror and the photoelectric detector are respectively used for reflecting and receiving scattered light generated by the irradiation of the light beam incident into the scattering cavity to the detected air flow; the light adjusting component is used for adjusting the relative distance between the laser and the shaping lens group along the light beam transmission direction.
The particle counter in the application is further provided with a dimming component besides conventional components such as a laser, a shaping lens and a scattering cavity, and the dimming component can adjust the distance between the laser and the shaping lens along the transmission light path direction of the light beam. According to the optical principle, along with the change of the relative position between the laser and the shaping lens, the size and the light spot intensity of the light beam output by the laser in the photosensitive area can also be changed, so that when the particle counter is actually used for detecting particles in the detected air flow, the relative position between the laser and the shaping lens is only required to be adjusted through the dimming component, the light spot intensity and the size of the light beam in the photosensitive area can be modulated to a reasonable range to the greatest extent, and the measurement accuracy of the particle counter is further improved.
Drawings
For a clearer description of embodiments of the utility model or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a particle counter according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional view of a particle counter according to an embodiment of the present disclosure.
Detailed Description
In a conventional particle counter, various components such as a light source and a scattering cavity are fixed in advance through debugging, but along with the extension of the service time of the particle counter, looseness among the components is unavoidable, so that tiny changes are generated in an optical path in the particle counter, the fineness of the optical path structure in the particle counter is high, and even tiny deviations generated in the optical path structure can reduce the detection precision of the particle counter to a great extent.
Therefore, the particle counter capable of adjusting the optical path structure is provided, and the detection precision of the particle counter is ensured to a certain extent.
In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 and 2, fig. 1 is a schematic cross-sectional structure of a particle counter according to an embodiment of the present application; fig. 2 is a schematic cross-sectional view of a particle counter according to an embodiment of the present disclosure. Fig. 1 and 2 are schematic structural diagrams of two cross sections of the particle counter perpendicular to each other.
In a specific embodiment of the present application, the particle counter may comprise:
a laser 1 for outputting a light beam, a shaping lens group 2 arranged on an optical path formed by light beam transmission, and a scattering cavity 3; the scattering cavity 3 is provided with an air inlet pipe 31, an air outlet pipe 32, a reflecting mirror 33 and a photoelectric detector 34; wherein the detected air flow flows into the scattering cavity from the air inlet pipe 31 and flows out from the air outlet pipe 32; the reflecting mirror 33 and the photodetector 34 are respectively used for reflecting and receiving scattered light generated by the particles to be measured in the airflow to be measured irradiated by the light beam incident into the scattering cavity 3;
the laser beam transmission device further comprises a dimming component connected with the laser 1 and the shaping lens group 2 and used for adjusting the relative distance between the laser and the shaping lens group 2 along the beam transmission direction.
It will be appreciated that the beam output by the laser 1 is transmitted in the dimmer pack and then enters the scattering chamber 3.
Referring to fig. 1 and 2, a shaping mirror group 2 and a scattering cavity 3 are sequentially disposed on an output optical path of a laser 1, and a light beam output by the laser 1 is shaped by the shaping mirror group 2 and then is incident into the scattering cavity 3. The shaping lens group 2 is typically a collimating lens group, and may include two optical lenses, i.e., a first lens 21 and a second lens 22, for collimating and compressing the light beam in a major axis and a minor axis, respectively, so as to reduce the divergence of the light beam. The first lens 21 and the second lens 22 may be selected from cylindrical lenses, aspherical lenses, or combinations thereof, for example, the first lens 21 is an aspherical lens, and the second lens 22 is a cylindrical lens.
The light beam output by the laser 1 is shaped by the shaping lens group 2 and then enters the scattering cavity 3, and the two opposite cavity walls of the scattering cavity 3 are penetrated and provided with the air inlet pipe 31 and the air outlet pipe 32 so that the detected air flow flows into the scattering cavity 3 from the air inlet pipe 31 and flows out from the air outlet pipe 32. The light beam output by the laser 1 forms a photosensitive area in the overlapped area of the transmission light path of the light beam in the scattering cavity 3 and the detected air flow in the scattering cavity 3. It will be appreciated that the photosensitive region should be located at a position between the inlet tube 31 and the outlet tube 32.
In addition, the other two opposite side walls of the scattering cavity 3 are respectively provided with a reflecting mirror 33 and a photoelectric detector 34; the air inlet pipe 31 and the air outlet pipe 32 are respectively positioned at two sides of the transmission path of the light beam; the mirror 33 and the photodetector 34 are located on the other two sides of the transmission path of the light beam, respectively.
When the light beam irradiates the particles to be detected in the photosensitive area, the light beam can be reflected by the particles to be detected to generate scattered light, the scattered light is transmitted in the scattering cavity 3 and reflected by the reflecting mirror 33 to the photodetector 34, and the scattered light received by the photodetector 34 generates corresponding electric signals so as to determine the particle size of the particles to be detected based on the electric signals. The photo detector 34 may be a photodiode or a photomultiplier, and the positions of the air inlet pipe 31, the air outlet pipe 32, the reflecting mirror 33 and the photo detector 34 disposed on the scattering cavity 3 are referred to as conventional particle counters, which will not be described in detail.
In order to ensure the width of the light beam and the light spot brightness in the photosensitive area, in this embodiment, a light adjusting component is further provided, and the distance between the laser 1 and the shaping lens set 2 can be adjusted by using the light adjusting component, obviously, when the distance between the laser 1 and the shaping lens set 2 changes, the size of the light beam in the photosensitive area and the light spot brightness also change necessarily correspondingly.
Therefore, in this embodiment, the relative distance between the laser 1 and the shaping lens set 2 can be adjusted by using the dimming component before using the particle counter each time, so that the size and the spot brightness of the light beam in the photosensitive area can reach the detection requirement to the greatest extent, and the detection precision of the particle counter is ensured.
In an alternative embodiment of the present application, the dimming assembly comprises an inner sleeve 42 and an outer sleeve 41;
one end of the outer sleeve 41 is connected with the laser 1, and the other end is connected with the inner sleeve 42 in an interpenetration sleeving manner with adjustable interpenetration depth;
one end of the inner sleeve 42 facing away from the outer sleeve 41 is connected to the scattering chamber 3;
the shaping lens group 2 comprises a first lens 21 and a second lens 22; and the first lens 21 and the second lens 22 are fixedly disposed inside the inner sleeve 42, and may be disposed at both ends of the inner sleeve 42, respectively.
Referring to fig. 1 and 2, the inner sleeve 42 and the outer sleeve 41 are both generally cylindrical in structure, wherein the laser 1 is disposed at an end of the outer sleeve 41, and the first lens 21 and the second lens 22 of the shaping lens set 2 are fixedly disposed in the inner sleeve 42, specifically, may be disposed at both ends of the inner sleeve 42. On the basis, the ends of the inner sleeve 42 and the outer sleeve 41 are mutually inserted and sleeved, so that when the depth of the mutual insertion and sleeve connection of the inner sleeve 42 and the outer sleeve 41 is different, the relative distance between the laser 1 and the shaping lens group 2 obviously also changes; therefore, in this embodiment, based on this principle, the depth of the inner sleeve 42 and the outer sleeve 41 that are mutually inserted and sleeved is adjustable, so in practical application, the adjustment of the spot size and the spot brightness of the beam cross section of the light beam in the photosensitive area can be achieved by adjusting the inserted depth between the inner sleeve 42 and the outer sleeve 41.
In the embodiment shown in fig. 1 and 2, the diameter of the outer wall of the inner sleeve 42 is the same as the diameter of the inner wall of the outer sleeve 41, and the inter-penetrating sleeve connection with adjustable penetration depth between the inner sleeve 42 and the outer sleeve 41 can be realized without a fixing piece.
Furthermore, the laser 1 is mounted directly or indirectly on the end of the outer sleeve 41, in particular on the end of the outer sleeve 41 facing away from the inner sleeve 42.
In view of the need to avoid relative movement of the inner sleeve 42 and the outer sleeve 41 during the detection of the detected airflow after the end portions of the two sleeve are adjusted to the proper penetration depth, in an alternative embodiment of the present application, the method may further include:
one end of the outer sleeve 41 and the inner sleeve 42 which are sleeved with each other is sleeved on the outer surface of the inner sleeve 42; and the outer sleeve 41 is provided with a limit screw hole 411;
when the limit screw hole 411 is screwed with a screw against the outer surface of the inner sleeve 42, the relative position between the inner sleeve 42 and the outer sleeve 41 is fixed.
In this embodiment, a plurality of limiting screw holes 411 penetrating through the thickness of the wall of the outer sleeve 41 can be formed around the outer surface of the outer sleeve 41 near the end portion connected with the inner sleeve 42, and when the outer sleeve 42 and the inner sleeve 41 are inserted and adjusted to a proper position, screws can be screwed into the limiting screw holes 411, so that the top ends of the screws can press against the outer surface of the inner sleeve 42, and the relative fixation between the inner sleeve 42 and the outer sleeve 41 can be realized, and when the laser 1 and the plastic lens group 2 need to readjust the relative distance, the screws can be screwed out from the limiting screw holes 411, and the depth of the insertion and the sleeving between the inner sleeve 42 and the outer sleeve 41 is readjusted.
Further, in another alternative embodiment of the present application, the inner sleeve may further comprise:
an integrally formed barrel structure 421 and barrel structure 422; the end of the cylinder structure 421 is connected with the outer sleeve 41; the cylinder plate structure 422 is connected with the scattering cavity 3; the second lens 22 is arranged on the cylinder plate structure 422, a mounting groove 301 is arranged on the outer wall of the scattering cavity 3 opposite to the second lens 22, and a first elastic rubber ring is arranged in the mounting groove 301.
Referring to fig. 1 and 2, the cylinder structure 421 is a substantially elongated column structure, and the cylinder structure 422 is a substantially plate-like structure, which are integrally formed; and the end of the cylinder structure 421 away from the cylinder structure 422 is the end connected with the outer sleeve 41, and the side of the cylinder structure 422 away from the cylinder structure 421 is fixedly connected with the outer side wall of the scattering cavity 3; thereby ensuring tightness of the connection between the whole of the inner sleeve 42 and the wall of the scattering chamber 3.
On the basis, the first lens 21 is arranged at one end of the cylinder structure 421 away from the cylinder structure 422; and the center of the barrel plate structure 422 is provided with a through hole in which the second lens 22 is disposed. The size of the through hole is not smaller than the inner diameter of the cylinder structure 421; the shape of the through hole is not particularly limited.
And the end of the cylinder structure 421 is opposite to the through hole, thereby making the inside of the cylinder structure 421 and the through hole of the cylinder structure 422 where the second lens 22 is disposed communicate with each other.
When the second lens 22 is disposed in the cylinder structure 422, one side of the second lens 22 is the cylinder structure 421, and the other side is the side of the convex curved surface of the second lens 22 facing the scattering cavity 3. In order to further ensure the tightness of the installation of the second lens 33, an installation groove 301 may be provided on the outer cavity wall of the scattering cavity 3 at a position opposite to the second lens 33, and a first elastic rubber ring may be provided in the installation groove 301, so that the first elastic rubber ring may press and adhere to the second lens 33, thereby ensuring tightness between the scattering cavity 3 and the second lens 33.
Based on the above discussion, the outer sleeve 41 and the cylinder structure 421 together form a light path channel for accommodating the light beam transmission output by the laser 1, so that in order to reduce the light beam transmission process in the light path channel as much as possible, the generated stray light will be transmitted into the scattering cavity 3 to affect the particle detection, and further black light absorption layers may be disposed on the inner walls of the inner sleeve 42 and the outer sleeve 41, so as to absorb the stray light generated in the light beam transmission process into the scattering cavity 3 to a certain extent, thereby being beneficial to improving the detection accuracy of the particle counter to a certain extent.
Optionally, when the second lens 22 is disposed in the cylinder plate structure 422, one side of the second lens 22 is a cylinder structure 421, and the other side is a side of the convex curved surface of the second lens 22 facing the scattering cavity 3, at this time, a second elastic rubber ring disposed in the cylinder plate structure 422 and abutting the second lens 22 is disposed between the cylinder structure 421 and the second lens 22.
In addition, as shown in fig. 1 and 2, the end of the outer sleeve 41 to which the laser 1 is connected may be provided with a mounting plate; the mounting plate 11 is provided with mounting holes for fixedly mounting the laser 1. The mounting plate 11 and the outer sleeve 41 may be detachably connected so that the laser 1 may be detached for repair or replacement in case of failure of the laser 1.
Optionally, in another optional embodiment of the present application, a front optical path channel 302 and a rear optical path channel 303 extending along an optical path formed by light beam transmission are disposed on two opposite cavity walls of the scattering cavity 3, and the rear optical path channel 303 is connected to the optical trap 5; so that the light beam is incident into the scattering chamber 3 along the front optical path channel 302 and output to the optical trap 5 through the rear optical path channel 303.
It will be appreciated that because the wall of the scattering chamber 3 has a certain thickness, the front optical path channel 302 is the optical path channel that extends through the wall of the scattering chamber 3 to accommodate the transmission of the beam output by the laser 1 to the interior of the scattering chamber 3. The light beam enters the scattering cavity 3 through the front light path channel 302, passes through the photosensitive area and then continues to be transmitted along a straight line to reach the other cavity wall of the scattering cavity 3, and in order to enable the light beam to be transmitted out of the scattering cavity 3, a rear light path channel is further arranged on the cavity wall, and the rear light path channel 303 is connected with the optical trap 5, so that the light beam can be directly incident on the optical trap 5.
In addition, during the transmission of the light beam in the front light path 302 and the rear light path 302, stray light is also generated, and if the stray light is incident into the scattering cavity 3 and is received by the photodetector 34 after repeated reflection, the detection of scattered light generated by the particles to be detected by the photodetector 34 is obviously disturbed. For this reason, in this embodiment, black light absorbing layers are further disposed on the inner walls of the front light path channel 302 and the rear light path channel 303, so that stray light transmitted into the scattering cavity is reduced, and the accuracy of particle detection by the particle counter is improved to a certain extent.
In summary, the particle counter in the present application is provided with a dimming component, which can adjust the distance between the laser and the shaping lens along the direction of the transmission path of the light beam. Based on the optical principle that the size and the light spot intensity of the light beam output by the laser can be changed along with the change of the relative position between the laser and the shaping lens, when the particle counter is actually utilized to detect particles in the detected air flow, the relative position between the laser and the shaping lens is only required to be adjusted through the dimming component, so that the light spot intensity and the size of the light beam in the light-sensitive area can be modulated to a reasonable range to the greatest extent, and the measurement precision of the particle counter is further improved.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is inherent to. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. In addition, the parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of the corresponding technical solutions in the prior art, are not described in detail, so that redundant descriptions are avoided.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (9)
1. A particle counter, comprising: the laser is used for outputting light beams, and the shaping lens group and the scattering cavity are arranged on an optical path formed by the light beam transmission; the scattering cavity is provided with an air inlet pipe, an air outlet pipe, a reflecting mirror and a photoelectric detector; the tested air flow flows into the scattering cavity from the air inlet pipe and flows out from the air outlet pipe; the reflecting mirror and the photoelectric detector are respectively used for reflecting and receiving scattered light generated by the light beam which is incident into the scattering cavity and irradiates the tested air flow;
the light adjusting component is connected with the laser and the shaping lens group and used for adjusting the relative distance between the laser and the shaping lens group along the light beam transmission direction.
2. The particle counter of claim 1, wherein the dimming component comprises an inner sleeve and an outer sleeve;
one end of the outer sleeve is connected with the laser, and the other end of the outer sleeve is connected with the inner sleeve in an interpenetration and sleeving manner, wherein the interpenetration depth of the interpenetration and sleeving manner is adjustable;
one end of the inner sleeve, which is away from the outer sleeve, is connected with the scattering cavity;
the shaping lens group comprises a first lens and a second lens; and the first lens and the second lens are respectively and fixedly arranged at two ends of the inner sleeve.
3. The particle counter of claim 2, wherein one end of the outer sleeve and the inner sleeve that are sleeved with each other are sleeved on the outer surface of the inner sleeve; the outer sleeve is provided with a limiting screw hole;
when the limit screw hole is internally screwed with a screw propping up the outer surface of the inner sleeve, the relative position between the inner sleeve and the outer sleeve is fixed.
4. The particle counter of claim 2, wherein the inner sleeve comprises an integrally formed barrel structure and barrel plate structure; the end part of the cylinder structure is connected with the outer sleeve; the cylinder plate structure is connected with the scattering cavity; the second lens is arranged on the cylinder plate structure, a mounting groove is formed in the outer wall of the scattering cavity, opposite to the second lens, and a first elastic rubber ring is arranged in the mounting groove.
5. The particle counter of claim 4, wherein a second elastomeric rubber ring is disposed between the barrel structure and the second lens and is disposed on the barrel structure and abuts the second lens.
6. The particle counter of claim 2, wherein the inner wall of the inner sleeve and the outer sleeve are each provided with a black light absorbing layer.
7. The particle counter of claim 2, wherein the end of the outer sleeve that connects the lasers is provided with a mounting plate; the mounting plate is provided with a mounting hole for fixedly mounting the laser.
8. A particle counter as claimed in claim 1 wherein two opposed chamber walls of said scattering chamber are provided with a front optical path channel and a rear optical path channel extending along the path of the light beam formed by the transmission of said light beam, said rear optical path channel being connected to an optical trap; so that the light beam is incident into the scattering cavity along the front light path channel and is output to the optical trap through the rear light path channel.
9. The particle counter of claim 8, wherein the front optical path channel and the rear optical path channel each have a black light absorbing layer disposed on an inner wall thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320114922.XU CN219065205U (en) | 2023-01-16 | 2023-01-16 | Particle counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320114922.XU CN219065205U (en) | 2023-01-16 | 2023-01-16 | Particle counter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219065205U true CN219065205U (en) | 2023-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320114922.XU Active CN219065205U (en) | 2023-01-16 | 2023-01-16 | Particle counter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219065205U (en) |
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2023
- 2023-01-16 CN CN202320114922.XU patent/CN219065205U/en active Active
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