Bioaerosol monitor

Abstract

The invention relates to the technical field of aerosol monitoring, in particular to a biological aerosol monitor which comprises a shell and a rotating shaft rotationally mounted in the shell, and further comprises an air inlet pipe and an air outlet pipe which are arranged at the top of the shell, and one ends of the air inlet pipe and the air outlet pipe penetrate through the shell and extend into the shell; the turntable is fixedly mounted at the top of the rotating shaft; the multiple fixing frames are fixedly installed at the top of the rotating disc in an annular array mode, and through grooves are formed in the fixing frames; the mounting cylinder is rotationally mounted on the fixing frame and located above the through groove, and the mounting cylinder and the through groove communicate with each other; the sampling tube is detachably mounted in the mounting cylinder, and one end of the sampling tube movably penetrates through the through groove; the fluorescence detection system is mounted in the shell; the shaking assembly is arranged on the fixing frame and is used for driving the mounting cylinder and the sampling tube to rotate. According to the biological aerosol monitor provided by the invention, rotation of the mounting cylinder and the sampling tube can be realized through the shaking assembly, so that aerosol particles in the sampling tube are mixed more uniformly, and the accuracy of monitoring data is improved.

Description

Technical Field

[0001] This invention relates to the field of aerosol monitoring technology, and in particular to a bioaerosol monitor. Background Technology

[0002] A bioaerosol monitor is a device specifically designed for real-time or offline detection of bioaerosols (including microorganisms, biomolecules, pollen, spores, and other biological particles) in the air. It is widely used in public health and safety, environmental monitoring, bioterrorism, and medical epidemic prevention. Its core function is to rapidly identify airborne biological threats or environmental biological indicators, providing data support for risk warning and control.

[0003] Typically, external air is drawn into the monitor through an air inlet. By illuminating the drawn-in air with fluorescence, biological particles (such as bacteria and viruses) emit characteristic fluorescence when excited by light of a specific wavelength. Their internal nucleic acids (purines / pyrimidines) and proteins (tryptophan). The fluorescence intensity can reflect the relative quantity of bioaerosols. Although it can detect the air in a certain area in real time, real-time monitoring may be affected by environmental interference (such as humidity and temperature affecting optical signals) or equipment errors (such as sensor drift), which can lead to data deviations and affect the accuracy of the measurement values. Summary of the Invention

[0004] Therefore, it is necessary to provide a bioaerosol monitor that can improve the accuracy of detection data to address the aforementioned technical problems.

[0005] The present invention provides a bioaerosol monitor, comprising a housing and a rotating shaft rotatably mounted inside the housing, and further comprising: The air inlet pipe and the air outlet pipe are located at the top of the housing, with one end of each pipe penetrating the housing and extending into the interior. The turntable is fixedly mounted on the top of the rotating shaft; A fixed frame, in a ring array, is fixedly installed on the top of the turntable, and multiple such frames are provided, each having a through slot. The mounting cylinder is rotatably mounted on the fixed frame, located above the through slot, and the two are in communication with each other; The sampling tube is detachably installed inside the mounting cylinder, with one end movably penetrating through the through groove; A fluorescence detection system is installed inside the housing; A wobbling component, mounted on the fixed frame, is used to drive the mounting cylinder and the sampling tube to rotate.

[0006] In one embodiment, the wobbling assembly includes a drive gear sleeved outside the mounting cylinder, and a rack is laterally movably arranged on one side of the mounting cylinder, the rack meshing with the drive gear for transmission.

[0007] In one embodiment, a movable frame is movably disposed on the fixed frame, and movable rods are fixedly disposed at both ends of the movable frame. One end of one movable rod movably passes through the fixed frame, and a fixed plate is movably sleeved on the outside of the other movable rod. The fixed plate is fixedly connected to the top of the fixed frame, and the movable frame is fixedly connected to the rack.

[0008] In one embodiment, the fixing frame is rotatably mounted on one side of the mounting cylinder with a vertical rod, and a cam is fixedly sleeved on the outside of the vertical rod, and the movable frame is movably sleeved on the outside of the cam.

[0009] In one embodiment, a positioning frame is fixedly installed on the top of the fixing frame, a vertical plate is fixedly installed on the bottom of the positioning frame, a vertical groove is opened on the vertical plate, a sliding plate is slidably installed in the vertical groove, a pressure plate is fixedly installed at the bottom of the sliding plate, and the pressure plate is movably abutting against the sampling tube opening.

[0010] In one embodiment, the vertical rod extends through the positioning frame at the end away from the fixed frame, a cylinder is fixedly sleeved on the outside of the vertical rod, a curved groove is formed on the outside of the cylinder, and a limit rod is fixedly provided at the end of the sliding plate away from the pressure plate, the limit rod slidingly engaging with the curved groove.

[0011] In one embodiment, the vertical rod is movably connected to a drive gear fixedly mounted at one end of the positioning frame.

[0012] In one embodiment, a ring is fixedly disposed inside the housing, and two internal teeth are provided on the inner side of the ring, with the drive gear meshing with the internal teeth for transmission.

[0013] In one embodiment, a baffle is fixedly disposed inside the housing, the bottom of the baffle is movably attached to the surface of the turntable, and the baffle faces the fluorescence detection system.

[0014] In one embodiment, the front end of the housing is provided with a display screen, and the rear end is provided with a network port.

[0015] The aforementioned bioaerosol monitor allows for the rotation of the mounting cylinder and sampling tube via a shaking component, resulting in more uniform mixing of aerosol particles within the sampling tube and improving the accuracy of the monitoring data. The contact between the pressure plate and the sampling tube opening ensures that the sample is not contaminated by external impurities. The engagement of the drive gear and internal gears enables the up-and-down movement of the pressure plate and the rotation of the sampling tube during turntable switching, making operation convenient and quick. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is another perspective view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the shell in this invention; Figure 4 This is a schematic diagram of the ring structure in this invention; Figure 5 This is a schematic diagram of the sampling tube in a sealed state in this invention; Figure 6 This is a schematic diagram of the limiting rod in this invention; Figure 7 This is a schematic diagram of the rack structure in this invention; Figure 8 This is a schematic diagram of the intake pipe in this invention; Figure 9 This is a schematic diagram of the sampling tube in the open state in this invention; Figure 10 This is a schematic diagram of the detection principle of the fluorescence detection system in this invention.

[0018] Figure label: 1. Housing; 2. Rotating shaft; 3. Inlet pipe; 4. Outlet pipe; 5. Turntable; 6. Fixture; 61. Through slot; 7. Sampling tube; 8. Fluorescence detection system; 81. Ultraviolet light-emitting diode; 82. Detection area and light trap; 83. Focusing lens group; 84. Dichroic mirror; 85. Long-wavelength focusing lens; 86. Second aperture; 87. Second fluorescence detector; 88. Short-wavelength focusing lens; 89. First aperture; 810. First fluorescence detector; 9. Shaking assembly; 91. Drive gear; 92. Rack; 93. Moving frame; 94. Movable rod; 95. Fixed plate; 96. Vertical rod; 97. Cam; 10. Mounting cylinder; 11. Positioning frame; 12. Vertical plate; 121. Vertical groove; 13. Sliding plate; 14. Pressure plate; 15. Cylinder; 151. Curved groove; 16. Limiting rod; 17. Drive gear; 18. Ring; 19. Internal gear; 20. Baffle; 21. Display screen; 22. Wire mesh port. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0024] The following is combined Figures 1-10 This invention describes a bioaerosol monitoring instrument.

[0025] like Figures 1-5and Figure 10 As shown, in one embodiment, a bioaerosol monitor includes a housing 1 and a rotating shaft 2 rotatably mounted inside the housing 1, and further includes: The air inlet pipe 3 and the air outlet pipe 4 are located at the top of the housing 1, with one end of each pipe penetrating the housing 1 and extending into the interior. Turntable 5 is fixedly installed on top of rotating shaft 2; The fixed frame 6 is fixedly installed on the top of the turntable 5 in a ring array, and multiple frames are set. A through slot 61 is opened on it. The mounting cylinder 10 is rotatably mounted on the fixed frame 6, located above the through groove 61 and the two are connected to each other; The sampling tube 7 is detachably installed inside the mounting cylinder 10, with one end movable through the through groove 61; The fluorescence detection system 8 is installed inside the housing 1; The shaking component 9 is mounted on the fixed frame 6 and is used to drive the mounting cylinder 10 and the sampling tube 7 to rotate.

[0026] Specifically, isotonic buffer (such as PBS) is added to each sampling tube 7. This will be referred to as buffer solution in this application. Sampling tube 7 must be made of a transparent material with low optical interference (such as quartz tube or borosilicate glass) to avoid light absorption or scattering by the tube wall (ordinary glass may absorb ultraviolet light, affecting biofluorescence detection). During sampling, one end of the inlet tube 3 extends and contacts the opening of the sampling tube 7. The inlet tube 3 is opened, allowing external air to be forced into the sampling tube 7. Part of the aerosol in the air dissolves in the buffer solution. The outlet tube 4 is connected to the inlet tube 3. When gas is drawn in, the outlet tube 4 is closed. After a certain amount of gas is drawn in, the inlet tube 3 is closed, and the valve and switch of the outlet tube 4 are opened to extract the air from the sampling tube 7, ensuring stable air pressure. Then, the inlet tube 3 retracts to its initial position. The rotating shaft 2 is rotated, causing the turntable 5 to rotate, moving the sampled tube 7, the corresponding mounting bracket 6, and the mounting cylinder 10 to a position close to the fluorescence detection system 8. The sampling tube 7 is detachably installed inside the mounting cylinder 10. During the rotation of the turntable 5, the mounting cylinder 10 and the sampling tube 7 are driven to rotate back and forth by the shaking component 9. This makes the aerosol particles more uniformly mixed in the buffer solution. The fluorescence detection system 8 emits a light source to detect them more accurately. The fluorescence detection unit 8 includes an ultraviolet light-emitting diode 81. A sampling detection area and a light trap 82 are provided along the laser output direction of the ultraviolet light-emitting diode 81. The aerosol particles in the detection area emit intrinsic fluorescence under the irradiation of the laser of the ultraviolet light-emitting diode 81. The intrinsic fluorescence is collected by the focusing lens group 83 and incident parallel to the dichroic mirror 84. The short-wavelength fluorescence of the intrinsic fluorescence is reflected by the dichroic mirror 84 and passes through the short-wavelength focusing lens 88 and the first aperture 89 in sequence before reaching the first fluorescence detector 810. The long-wavelength fluorescence of the intrinsic fluorescence passes through the dichroic mirror 84 and passes through the long-wavelength focusing lens 85 and the second aperture 86 in sequence before reaching the second fluorescence detector 87. When the ultraviolet light-emitting diode 81 of the fluorescence detection unit 8 starts working, the emitted laser excites the aerosol particles in the buffer solution. The first fluorescence detector 810 and the second fluorescence detector 87 respectively obtain the first channel intrinsic fluorescence signal and the second channel intrinsic fluorescence signal, thus distinguishing the aerosol particles. After the sampled tube 7 is rotated to one side of the fluorescence detection system 8, the other set of unsampled sample tubes 7 are rotated back to the side of the air inlet pipe 3, which facilitates the air extraction and detection in another area. This allows for the retention and detection of air in multiple areas, ensuring the accuracy of the detection results. The through groove 61 provides a space for the bottom of the sample tube 7.

[0027] See Figures 5-7 As shown, in this embodiment, the shaking component 9 includes a drive gear 91, which is sleeved on the outside of the mounting cylinder 10. The fixing frame 6 is laterally movably arranged with a rack 92 on one side of the mounting cylinder 10, and the rack 92 meshes with the drive gear 91 for transmission.

[0028] Specifically, after the sampling tube 7 has finished taking a sample, the turntable 5 rotates, causing the sampling tube 7 to rotate in the direction of the fluorescence detection system 8. During this process, the rack 92 moves laterally along the fixing frame 6. The movement of the rack 92 will drive the drive gear 91 and the mounting cylinder 10 to rotate. The rotation of the mounting cylinder 10 will drive the sampling tube 7 to rotate. This will make the aerosol particles mix more evenly in the buffer solution, which is beneficial for subsequent detection.

[0029] See Figures 5-7 As shown, in this embodiment, a movable frame 93 is movably arranged on the fixed frame 6, and movable rods 94 are fixedly arranged at both ends of the movable frame 93. One end of one movable rod 94 movably passes through the fixed frame 6, and a fixed plate 95 is movably sleeved on the outside of the other movable rod 94. The fixed plate 95 is fixedly connected to the top of the fixed frame 6, and the movable frame 93 is fixedly connected to the rack 92.

[0030] Specifically, after the sampling tube 7 has finished sampling, the turntable 5 rotates, causing the sampling tube 7 to rotate towards the fluorescence detection system 8. During this process, the moving frame 93 moves laterally towards the mounting cylinder 10. The movement of the moving frame 93 causes the rack 92 to move laterally, thereby causing the drive gear 91, the mounting cylinder 10, and the sampling tube 7 to rotate, so that the aerosol particles are mixed evenly in the buffer solution. The movement of the moving frame 93 causes the movable rods 94 on both sides to move, moving along the fixed plate 95 and the fixed frame 6 respectively. The fixed plate 95 and the fixed frame 6 provide support for the movement of the movable rods 94 and the moving frame 93.

[0031] See Figure 5 As shown, in this embodiment, a vertical rod 96 is rotatably mounted on one side of the mounting cylinder 10, and a cam 97 is fixedly sleeved on the outside of the vertical rod 96. The movable frame 93 is movably sleeved on the outside of the cam 97.

[0032] Specifically, after the sampling tube 7 has finished sampling, the turntable 5 rotates, causing the sampling tube 7 to rotate in the direction of the fluorescence detection system 8. During this process, the vertical rod 96 is rotated, and the rotation of the vertical rod 96 will cause the cam 97 to rotate. The rotation of the cam 97 will cause the moving frame 93 to move, thereby causing the rack 92 to move, thus realizing the rotation of the sampling tube 7.

[0033] See Figures 5-7 and Figure 9 As shown, in this embodiment, a positioning frame 11 is fixedly installed on the top of the fixing frame 6, and a vertical plate 12 is fixedly installed on the bottom of the positioning frame 11. A vertical groove 121 is opened on the vertical plate 12, and a sliding plate 13 is slidably installed in the vertical groove 121. A pressure plate 14 is fixedly installed at the bottom of the sliding plate 13, and the pressure plate 14 is in movable contact with the opening of the sampling tube 7.

[0034] Specifically, when the turntable 5 rotates, causing the corresponding sampling tube 7, fixing frame 6, and positioning frame 11 to rotate towards the air inlet pipe 3, the end of the air inlet pipe 3 is retracted and does not contact the sampling tube 7. At this time, the sliding plate 13 is located at the bottom of the vertical groove 121, and the pressure plate 14 is in movable contact with the opening of the corresponding sampling tube 7. This ensures that external debris will not enter the sampling tube 7 and contaminate the buffer solution. During the rotation, the sliding plate 13 moves upward along the vertical groove 121 of the vertical plate 12. The upward movement of the sliding plate 13 will drive the pressure plate 14 to move upward. The pressure plate 14 will no longer contact the sampling tube 7, thus closing the tube opening. The sampling tube 7 is exposed, and then rotates to the side of the air inlet tube 3. At this time, the end of the air inlet tube 3 extends to align with the opening of the sampling tube 7, allowing air to be drawn into the air inlet tube 3 for sampling. After sampling, the end of the air inlet tube 3 retracts again, and the turntable 5 continues to rotate in the same direction, driving the sampled sampling tube 7 to the side of the fluorescence detection system 8 for detection. During the rotation, the sliding plate 13 moves downward, causing the pressure plate 14 to re-close the tube opening. Since the pressure plate 14 is in contact with the tube opening, the sampling tube 7 can also rotate during this process, which allows the aerosol to mix evenly in the buffer solution. The positioning frame 11 provides support.

[0035] See Figure 5 and Figure 6 As shown, in this embodiment, the end of the vertical rod 96 away from the fixed frame 6 movably passes through the positioning frame 11, and a cylinder 15 is fixedly sleeved on the outside of the vertical rod 96. A curved groove 151 is opened on the outside of the cylinder 15. A limiting rod 16 is fixedly installed on the end of the sliding plate 13 away from the pressure plate 14. The limiting rod 16 slides and fits in contact with the curved groove 151.

[0036] Specifically, when the turntable 5 rotates, causing the corresponding sampling tube 7, fixing frame 6, and positioning frame 11 to rotate towards the air inlet pipe 3, the vertical rod 96 rotates 180 degrees. The rotation of the vertical rod 96 causes the cylinder 15 to rotate, and the rotation of the cylinder 15 causes the curved groove 151 to rotate 180 degrees, which will cause the limiting rod 16 to move upward, thereby causing the sliding plate 13 and the pressure plate 14 to move upward, exposing the tube opening, making it convenient for the air inlet pipe 3 to connect with it. After sampling is completed, the turntable 5 continues to rotate in the same direction, causing the sampling tube 7 to move and rotate towards the fluorescence detection system 8. During this process, the vertical rod 96 continues to rotate 180 degrees in the same direction. The rotation of the cylinder 15 and the curved groove 151 will cause the limiting rod 16 to move downward to the initial position. The sliding plate 13 and the pressure plate 14 also move downward. The pressure plate 14 re-seals the tube opening to ensure that the sample is not contaminated.

[0037] See Figure 5 As shown, in this embodiment, the vertical rod 96 is movably inserted through one end of the positioning frame 11 and a drive gear 17 is fixedly installed.

[0038] Specifically, the rotation of the drive gear 17 will drive the vertical rod 96 to rotate, thereby realizing the up and down movement of the pressure plate 14 and the rotation of the sampling tube 7.

[0039] See Figure 4 , Figure 5 and Figure 8 As shown, in this embodiment, a ring 18 is fixedly arranged inside the housing 1, and two internal teeth 19 are arranged on the inner side of the ring 18. The drive gear 17 meshes with the internal teeth 19 for transmission.

[0040] Specifically, as the turntable 5 rotates, it drives the corresponding sampling tube 7, fixing frame 6, and positioning frame 11 to rotate in the direction of the air inlet pipe 3. During this process, the drive gear 17 will mesh with the first internal tooth 19 of the ring 18. The drive gear 17 will rotate 180 degrees to move the pressure plate 14 upward, exposing the tube opening for easy sampling. After sampling is completed, the turntable 5 continues to rotate in the same direction. The drive gear 17 will mesh with the second inner wall. The drive gear 17 will continue to rotate 180 degrees in the same direction to move the pressure plate 14 downward to seal the tube opening and prevent the solution in the sampling tube 7 from being contaminated.

[0041] See Figure 3 and Figure 4 As shown, in this embodiment, a baffle 20 is fixedly installed inside the housing 1. The bottom of the baffle 20 is movably attached to the surface of the turntable 5, and the baffle 20 faces the fluorescence detection system 8.

[0042] Specifically, the baffle 20 remains stationary. The function of the baffle 20 is to prevent the light from shining on the sampling tube 7 behind when the fluorescence detection system 8 emits light for detection, so as to avoid affecting the accuracy of the detection value.

[0043] See Figure 1 and Figure 2 As shown, in this embodiment, a display screen 21 is provided on the front end of the housing 1, and a network port 22 is provided on the rear end.

[0044] Specifically, the network port 22 is used for the monitoring instrument to connect to the network, and the display screen 21 can display the detection results of the solution in the sampling tube 7 clearly.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A bioaerosol monitor, comprising a housing and a rotating shaft rotatably mounted inside the housing, characterized in that, Also includes: The air inlet pipe and the air outlet pipe are located at the top of the housing, with one end of each pipe penetrating the housing and extending into the interior. The turntable is fixedly mounted on the top of the rotating shaft; A fixed frame, in a ring array, is fixedly installed on the top of the turntable, and multiple such frames are provided, each having a through slot. The mounting cylinder is rotatably mounted on the fixed frame, located above the through slot, and the two are in communication with each other; The sampling tube is detachably installed inside the mounting cylinder, with one end movably penetrating through the through groove; A fluorescence detection system is installed inside the housing; A wobbling component, mounted on the fixed frame, is used to drive the mounting cylinder and the sampling tube to rotate.

2. The bioaerosol monitor according to claim 1, characterized in that, The wobbling assembly includes a drive gear, which is sleeved outside the mounting cylinder. The fixing frame is laterally movably arranged with a rack on one side of the mounting cylinder, and the rack meshes with the drive gear for transmission.

3. A bioaerosol monitor according to claim 2, characterized in that, A movable frame is movably mounted on the fixed frame. Movable rods are fixedly mounted at both ends of the movable frame. One end of one movable rod movably passes through the fixed frame, and a fixed plate is movably sleeved on the outside of the other movable rod. The fixed plate is fixedly connected to the top of the fixed frame, and the movable frame is fixedly connected to the rack.

4. A bioaerosol monitor according to claim 3, characterized in that, The fixed frame is rotatably mounted on one side of the mounting cylinder with a vertical rod, and a cam is fixedly sleeved on the outside of the vertical rod. The movable frame is movably sleeved on the outside of the cam.

5. A bioaerosol monitor according to claim 4, characterized in that, A positioning frame is fixedly installed on the top of the fixed frame, and a vertical plate is fixedly installed on the bottom of the positioning frame. A vertical groove is opened on the vertical plate, and a sliding plate is slidably installed in the vertical groove. A pressure plate is fixedly installed at the bottom of the sliding plate, and the pressure plate is in movable contact with the sampling tube opening.

6. A bioaerosol monitor according to claim 5, characterized in that, The vertical rod extends through the positioning frame at one end away from the fixed frame. A cylinder is fixedly sleeved on the outside of the vertical rod, and a curved groove is formed on the outside of the cylinder. A limit rod is fixedly provided at one end of the sliding plate away from the pressure plate, and the limit rod slides and fits against the curved groove.

7. A bioaerosol monitor according to claim 6, characterized in that, The vertical rod is movably inserted through one end of the positioning frame and a drive gear is fixedly installed thereon.

8. A bioaerosol monitor according to claim 7, characterized in that, A circular ring is fixedly installed inside the housing, and two internal teeth are provided on the inner side of the circular ring. The drive gear meshes with the internal teeth for transmission.

9. A bioaerosol monitor according to claim 1, characterized in that, A baffle is fixedly installed inside the housing, and the bottom of the baffle is movably attached to the surface of the turntable, with the baffle facing the fluorescence detection system.

10. A bioaerosol monitor according to claim 1, characterized in that, The front end of the housing is equipped with a display screen, and the rear end is equipped with a network port.

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