Aerosol sampler

Abstract

This invention provides an aerosol sampler, relating to the field of biosafety detection technology. The aerosol sampler includes a housing, an airflow assembly, and a sampling component. A cavity is formed within the housing, and the airflow assembly is disposed within the cavity. The airflow assembly includes an air inlet and an air outlet. Mounting holes matching the air inlet and outlet are formed on the housing. The airflow assembly includes a turbulence-generating element. The sampling component is disposed within the cavity and includes a sampling cup. The receiving cavity of the sampling cup has an inverted conical structure, and the sampling cup is connected to the turbulence-generating element. Using the aerosol sampler provided by this invention, broad-spectrum and efficient collection of particulate matter in aerosols can be achieved.

Description

Technical Field

[0001] This invention relates to the field of biosafety detection technology, and in particular to an aerosol sampler. Background Technology

[0002] Aerosols are gaseous dispersion systems composed of solid or liquid particles suspended in a gaseous medium. The gas is the continuous phase, and the solid or liquid particles are the dispersed phase. Aerosols are multiphase fluids composed of both a continuous and a dispersed phase. The dispersed phase consists of various solid or liquid particles with different sizes and properties. Therefore, the fluid behavior of the continuous phase (gas) and the diverse dispersed phases (solid or liquid particles) in a multiphase fluid differs significantly. To facilitate the study of aerosols, samples are taken, and then the solid or liquid particles are separated from the gas for further analysis.

[0003] In existing technologies, the separation of the continuous phase (gas) and the dispersed phase (solid or liquid particles) is usually achieved by using a cyclone. One method is to use aerosol and sampling liquid to form a cyclone simultaneously, collecting the separated dispersed phase in the sampling liquid; another method is to use aerosol itself to form a cyclone, and then collect the dispersed phase in the sampling liquid after it settles.

[0004] Given the diversity of particle size and property spectra of solid or liquid particles, relying on fixed-mode cyclones inevitably results in some solid or liquid particles with different sizes and properties not being collected. This leads to a low coverage of the types of solid or liquid particles collected, requiring multiple collections and affecting collection efficiency. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in related technologies. To this end, the present invention provides an aerosol sampler to achieve broad-spectrum and efficient collection of particulate matter in aerosols.

[0006] This invention provides an aerosol sampler, comprising:

[0007] A housing, wherein a cavity is formed within the housing;

[0008] A ventilation system assembly is disposed within the cavity, the ventilation system assembly includes an air inlet and an air outlet, and mounting holes matching the air inlet and the air outlet are formed on the housing;

[0009] The airflow assembly includes a turbulence-generating element;

[0010] A sampling assembly is disposed within the cavity. The sampling assembly includes a sampling cup, the receiving cavity of which has an inverted conical structure, and the sampling cup is connected to the turbulence-generating component.

[0011] According to the aerosol sampler provided in the embodiments of the present invention, a turbulence element is provided in the airflow assembly to create turbulence in the aerosol flowing through the airflow assembly. When the aerosol flows directionally into the sampling medium in the sampling cup, the aerosol and the sampling medium move together along the tube wall of the sampling cup in a turbulent motion. During the turbulent motion, solid or liquid particles contained in the aerosol are adsorbed by the sampling medium, thereby achieving particle collection. Specifically, the aerosol sampler includes a housing, and the airflow assembly and the sampling assembly are both disposed in the cavity of the housing. The air inlet and air outlet of the airflow assembly are fixed in the mounting holes on the housing to form an airflow guide. When collecting aerosols, air enters the airflow assembly through the air inlet. When flowing through the turbulence element in the airflow assembly, the turbulence element can convert the irregularly moving aerosols in the outside into regularly moving gas with a uniform flow rate and uniform velocity, that is, the gas is in a turbulent state. The turbulent aerosols further flow in the airflow assembly and flow directionally into the sampling cup. When the aerosol is in the sampling medium, it can move turbulently along the side wall of the sampling cup together with the sampling medium. The cavity of the sampling cup is designed as an inverted cone. During the turbulent movement, the aerosol and the sampling medium form wall shear turbulence at different cross-sections of the inverted cone cavity. The different flow velocities at different cross-sections can selectively enrich solid or liquid particles of different sizes and properties. These particles are adsorbed by the sampling medium and collected in the sampling medium. After the particle collection is completed, the gas continues to flow out through the air outlet from the air path assembly. Using the aerosol sampler provided in this embodiment of the invention, a broad-spectrum and efficient collection of particles in aerosols can be achieved.

[0012] According to one embodiment of the present invention, the air duct assembly further includes a first pipe, a second pipe, and a fan, wherein the first pipe is connected to the air inlet, the second pipe is connected to the air outlet, and the first pipe and the second pipe are connected through the fan;

[0013] The turbulence-inducing element is installed on the first pipe.

[0014] According to one embodiment of the present invention, the first pipe includes a first main body and a second main body, which are connected at a 90-degree bend. The turbulence-generating element is connected to the first main body, and the fan is connected to the second main body. The inner diameter of the first pipe and the specific structural parameters of the first main body and the second main body are defined as follows:

[0015] The inner diameter d of the pipeline:

[0016] The length L1 of the first main body is: 2d ≥ L1 ≥ 3d;

[0017] The length L2 of the second main body is: L2 ≥ d;

[0018] Where Q is the gas flow rate and V is the gas velocity.

[0019] According to one embodiment of the present invention, the airflow assembly further includes a gas flow meter disposed on the second pipe.

[0020] According to one embodiment of the present invention, the sampling assembly further includes a waterproof component disposed at the connection position between the first pipe and the turbulence component.

[0021] According to one embodiment of the present invention, the air duct assembly further includes a noise reduction and silencing component, which is disposed at the air outlet.

[0022] According to one embodiment of the present invention, the airflow assembly further includes a particle interception filter, which is disposed on the noise reduction and silencing component and located away from one end of the cavity.

[0023] According to one embodiment of the present invention, the aerosol sampler further includes a sterilization component disposed at the connection position between the sampling cup and the turbulence element.

[0024] According to one embodiment of the present invention, the sterilization component includes a sterilization lamp and a sterilization controller, wherein the sterilization controller is electrically connected to the sterilization lamp.

[0025] According to one embodiment of the present invention, the aerosol sampler further includes a control component adapted to monitor and control the operating state of the aerosol sampler.

[0026] According to one embodiment of the present invention, the sampling cup is snapped into the turbulence element;

[0027] The sampling cup contains a sampling solution, which is a biosafe solution.

[0028] According to one embodiment of the present invention, a spiral protrusion is formed on the inner wall of the turbulence member, and the spiral protrusion is close to the port where the turbulence member is connected to the sampling cup. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is an exploded view of the structure of the aerosol sampler provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the airflow assembly provided in the embodiment of the present invention. Figure 1 ;

[0032] Figure 3 This is a schematic diagram of the structure of the airflow assembly provided in the embodiment of the present invention. Figure 2 ;

[0033] Figure 4 This is a schematic diagram of the structure of the disinfection component provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the noise reduction and sound absorption component and the particle interception and filtering component provided in the embodiments of the present invention;

[0035] Figure 6 This is a schematic diagram of the sampling cup provided in an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the overall structure of the aerosol sampler provided in this embodiment of the invention. Figure 1 ;

[0037] Figure 8 This is a schematic diagram of the overall structure of the aerosol sampler provided in this embodiment of the invention. Figure 2 ;

[0038] Figure 9 This is a schematic diagram of the turbulence component provided in an embodiment of the present invention.

[0039] Figure label:

[0040] 10. Shell;

[0041] 20. Airflow assembly; 210. Turbulence-inducing component; 211. Spiral protrusion; 220. First duct; 221. First main body; 222. Second main body; 230. Second duct; 240. Fan; 250. Gas flow meter; 260. Noise reduction and silencing component; 270. Particle interception filter component; 280. Air inlet; 290. Air outlet;

[0042] 310. Sampling cup; 311. Sampling solution; 320. Waterproof components;

[0043] 410. Disinfection lamp; 420. Disinfection controller. Detailed Implementation

[0044] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0045] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0047] In embodiments of the present 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 is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] like Figures 1 to 9As shown, this embodiment of the invention provides an aerosol sampler, which includes a housing 10, an airflow assembly 20, and a sampling component. A cavity is formed within the housing 10, and the airflow assembly 20 is disposed within the cavity. The airflow assembly 20 includes an air inlet 280 and an air outlet 290. Mounting holes matching the air inlet 280 and air outlet 290 are formed on the housing 10. The airflow assembly 20 includes a turbulence element 210. The sampling component is disposed within the cavity and includes a sampling cup 310. The receiving cavity of the sampling cup 310 has an inverted conical structure, and the sampling cup 310 is connected to the turbulence element 210.

[0050] The housing 10, i.e., the outer shell structure of the aerosol sampler, has mounting holes for installing the air inlet 280 and the air outlet 290. The airflow assembly 20 is a connected flow path for realizing gas flow, with gas sequentially passing through the air inlet 280, the airflow assembly 20, and the air outlet 290. The turbulence-generating component 210 can transform irregularly moving gas from the outside into regularly moving gas with a uniform flow rate and velocity within the aerosol sampler. The sampling component is used to collect particulate matter in the aerosol. The sampling cup 310 contains a sampling medium, which is usually liquid and can adsorb particulate matter in the gas. Other types of sampling media that can achieve turbulent flow and collect particulate matter are also within the scope of protection of this invention.

[0051] The airflow assembly 20 and the sampling assembly are both housed within the cavity of the housing 10, which protects the airflow assembly 20, the sampling assembly, and other internal structures. To maintain the overall stability of the aerosol sampler, a base can be installed at the bottom of the housing 10. To facilitate carrying the aerosol sampler, a carrying strap can be provided at the top of the housing 10. Wall mounting holes can also be provided on the side wall of the housing 10, allowing it to be fixed to a wall or a movable column, making it easy to carry and flexible in placement, thus adapting the aerosol sampler to different application scenarios.

[0052] According to the aerosol sampler provided in the embodiment of the present invention, by setting a turbulence element 210 in the air path assembly 20, the aerosol flowing through the air path assembly 20 forms a turbulent flow. When the aerosol flows directionally into the sampling medium in the sampling cup 310, the aerosol and the sampling medium move together along the tube wall of the sampling cup 310 in a turbulent flow. During the turbulent flow, the solid or liquid particles contained in the aerosol will be adsorbed by the sampling medium, thereby realizing the collection of particles. Specifically, the aerosol sampler includes a housing 10, an airflow assembly 20, and a sampling component, all housed within a cavity in the housing 10. The air inlet 280 and outlet 290 of the airflow assembly 20 are fixed within mounting holes on the housing 10 to form an airflow path. When collecting aerosols, air enters the airflow assembly 20 through the air inlet 280. As air flows through the turbulence element 210 within the airflow assembly 20, the turbulence element 210 transforms irregularly moving gas into regularly moving gas with uniform flow rate and velocity, i.e., the gas is in a turbulent state. The turbulent aerosol then flows further within the airflow assembly 20. When the aerosol flows directionally into the sampling medium in the sampling cup 310, it can move turbulently along the side wall of the sampling cup 310 together with the sampling medium. The receiving cavity of the sampling cup 310 is designed as an inverted cone. During the turbulent movement, the aerosol and the sampling medium form wall shear turbulence at different cross-sections of the inverted cone-shaped receiving cavity. Different flow velocities at different cross-sections can selectively enrich solid or liquid particles of different sizes and properties. These particles are adsorbed by the sampling medium and then collected in the sampling medium. After the particle collection is completed, the gas continues to flow out through the air outlet 290 from the air path assembly 20. Using the aerosol sampler provided in this embodiment of the invention, a broad-spectrum and efficient collection of particles in aerosols can be achieved.

[0053] like Figures 1 to 3 As shown, in an embodiment of the present invention, the airflow assembly 20 further includes a first pipe 220, a second pipe 230, and a fan 240. The first pipe 220 is connected to the air inlet 280, and the second pipe 230 is connected to the air outlet 290. The first pipe 220 and the second pipe 230 are connected through the fan 240. A turbulence-generating element 210 is disposed on the first pipe 220. When the fan 240 is started, it can create a negative pressure in the entire airflow assembly 20 to draw in outside air. Along the direction of gas flow, the aerosol passes sequentially through the air inlet 280, the first pipe 220, the sampling cup 310, and the second pipe 230, and then flows out from the air outlet 290. The turbulence-generating element 210 is installed on the first pipe 220. In this way, when the aerosol enters the first pipe 220 from the air inlet 280, it can be immediately converted into a turbulent state and then enter the sampling cup 310 for particulate matter separation and collection. This avoids the aerosol flowing too far before turbulence rectification, which would cause it to mix with other gases and thus affect the accuracy of the collection.

[0054] The first pipe 220 and the second pipe 230 can be configured with a large inner diameter. This can avoid the frequent impact of particles on the pipe wall during high-speed movement, which would lead to low sampling efficiency. It can achieve high flow rate, low damage to particle collection, high collection efficiency and wide coverage.

[0055] In an embodiment of the present invention, the inner diameter of the first pipe 220 and the second pipe 230 can be set to 26 mm. Of course, the inner diameters of the first pipe 220 and the second pipe 230 do not necessarily have to be exactly the same, and can be set to different sizes according to actual needs.

[0056] like Figure 3 As shown, in an embodiment of the present invention, the first pipe 220 includes a first main body 221 and a second main body 222, which are connected at a 90-degree bend. A turbulence-inducing component 210 is connected to the first main body 221, and a fan 240 is connected to the second main body 222. The pipe inner diameter of the first pipe 220 and the specific structural parameters of the first main body 221 and the second main body 222 are defined as follows:

[0057] Pipe inner diameter d:

[0058] The length L1 of the first main body 221 is: 2d ≥ L1 ≥ 3d;

[0059] The length L2 of the second main body 222: L2≥d;

[0060] Where Q is the gas flow rate and V is the gas velocity.

[0061] The first conduit 220 is a crucial component connecting the fan 240, the turbulence-generating element 210, and the sampling cup 310. Based on the specific structural parameters of the first conduit 220, it can meet the requirements for high-flow-rate aerosol sampling. Specifically, when the aerosol sampler is operating, the gas flow rate is at least 200 L / min (12 m³ / min). 3 / h,), when operating at full load, the gas flow rate can reach 600L / min (36m 3The gas flow rate must be between 20 and 40 m / s to meet the conditions for turbulent gas flow. The lengths of the first main body 221 and the second main body 222 of the first pipe 220 are specifically defined. This ensures that the lengths of the first main body 221 and the second main body 222 are adequately matched to the inner diameter of the first pipe 220. This prevents the overall length of the first pipe 220 from being too long, which would result in insufficient negative pressure suction from the fan 240 on the air inlet 280, the turbulent flow component 210, and the sampling cup 310. Conversely, it also prevents the overall length of the first pipe 220 from being too short, which would result in excessive negative pressure suction from the fan 240 on the air inlet 280, the turbulent flow component 210, and the sampling cup 310, affecting the turbulent flow state in the turbulent flow component 210. The first main body 221 and the second main body 222 can be connected via a right-angle bend joint or directly integrally formed.

[0062] like Figure 2 As shown, in an embodiment of the present invention, the airflow assembly 20 further includes a gas flow meter 250, which is disposed on the second pipe 230. The gas flow meter 250 can acquire the flow rate of the gas flowing through the second pipe 230 to characterize the aerosol sampling flow rate value, enabling real-time monitoring of the aerosol sampling flow rate. Based on the monitored value, the sampling volume can be adjusted.

[0063] like Figure 1 As shown, in an embodiment of the present invention, the sampling assembly further includes a waterproof component 320, which is disposed at the connection position between the first pipe 220 and the turbulence component 210. When the sampling medium is in a cyclone, it will generate water vapor or small droplets. During high-frequency sampling, liquid molecules may cause the fan 240 to age rapidly, or the circuit board to short-circuit. Therefore, by providing the waterproof component 320, water vapor generated by the cyclone can be prevented from entering the first pipe 220 and contaminating it. It also ensures that the fan 240 does not become contaminated with the sampling medium, thus guaranteeing the accuracy of the collected particulate matter.

[0064] Furthermore, the waterproof component 320 can be a thin film structure similar to a filter membrane, which can adsorb water molecules but does not affect gas flow.

[0065] like Figure 5 As shown, in an embodiment of the present invention, the airflow assembly 20 further includes a noise reduction and silencing component 260, which is disposed at the air outlet 290. By placing the noise reduction and silencing component 260 at the air outlet 290, noise generated during gas flow can be absorbed, preventing the aerosol collector from amplifying noise and causing external noise interference during operation.

[0066] like Figure 5As shown in the embodiment of the present invention, the airflow assembly 20 further includes a particle interception filter 270, which is disposed on the noise reduction and silencing component 260 and located away from one end of the cavity. The particle interception filter 270 can trap residual particles in the gas, preventing them from overflowing and causing pollution to the external environment.

[0067] In an embodiment of the present invention, the aerosol sampler further includes a sterilization component disposed at the connection position between the sampling cup 310 and the turbulence component 210. The sterilization component is used to disinfect the environment of the sampling cup 310 and the turbulence component 210 to maintain a sterile environment, facilitating the next aerosol sampling operation and ensuring the accuracy of the sampling.

[0068] like Figure 4 As shown, in an embodiment of the present invention, the sterilization component includes a sterilization lamp 410 and a sterilization controller 420, the sterilization controller 420 being electrically connected to the sterilization lamp 410. The light emitted by the sterilization lamp 410 can disinfect bacteria, viruses, and other microorganisms. The light from the sterilization lamp 410 has a wide coverage area, ensuring thorough sterilization without leaving any blind spots. The sterilization controller 420 is used to receive sterilization commands and control the status of the sterilization lamp 410, including its on / off state, on / off duration, on / off brightness, etc. The sterilization lamp 410 can be an ultraviolet sterilization lamp, but this embodiment of the present invention does not specifically limit its use.

[0069] The sterilization process is achieved through ultraviolet irradiation. Ultraviolet light irradiates oxygen, causing some oxygen molecules to be activated and dissociated into oxygen atoms, which in turn form ozone. The ozone diffuses through the first pipe 220, the second pipe 230, the sampling cup 310, and the turbulence component 210, thereby disinfecting all parts of the gas flow.

[0070] In embodiments of the present invention, the aerosol sampler further includes a control component adapted to monitor and control the operating status of the aerosol sampler. The control component acts as the command center of the aerosol sampler, capable of issuing corresponding execution commands to the aerosol sampler based on user instructions, and monitoring the operating status of each component in real time during the operation of the aerosol sampler.

[0071] Specifically, the control components may include a touch screen, a QR code scanning module, indicator lights, a control board, an antenna, a gateway module, a power socket, and a reserve battery. A QR code can be placed on the sampling cup 310, and a corresponding QR code scanning window is opened on the housing 10 of the aerosol sampler. Scanning the QR code on the cup allows for data entry and recording. The gateway module can use a wireless communication network to upload data to a remote management platform. Data can be transmitted over long distances to collaboratively monitor the Internet of Things (IoT), enabling regional aerosol situation analysis and biosafety status awareness, resulting in enhanced performance. Users can input control commands through the touch screen, which displays the aerosol sampler's operating parameters, making the operating status visible. The operating status of the aerosol sampler can be distinguished by different states such as flashing, brightness, and color of the indicator lights. For example, if the indicator lights flash and change, it indicates an abnormal operation requiring special attention.

[0072] When aerosol samplers are used in fixed environments, they can usually be powered by connecting a power cord to a power socket or outlet. If the aerosol sampler is used in mobile environments or in the event of a sudden power outage, the backup battery is activated to ensure that the power supply is uninterrupted and the sampler can work normally. Alternatively, if the power is interrupted, the sampler can continue to work and save data in real time, so that the work will not be in vain due to power failure.

[0073] like Figure 6 As shown, in an embodiment of the present invention, the sampling cup 310 is snapped into the turbulence-prone component 210, and the receiving cavity of the sampling cup 310 is provided with a sampling liquid 311, which is a biosafe solution. The snap-fit ​​connection between the sampling cup 310 and the turbulence-prone component 210 is convenient and efficient, and also facilitates the disassembly of the sampling cup 310 for cleaning and replacement, thereby improving sampling efficiency.

[0074] Furthermore, by extending the bayonet structure of the sampling cup 310, the risk of the sampling medium contaminating the fan 240 and spilling onto the pipeline can be avoided, keeping the pipeline dry and reducing the operational risk of the aerosol sampler.

[0075] In one embodiment, the bayonet of the sampling cup 310 can be extended to 32mm to ensure that water vapor generated by the cyclone does not spill. The bayonet of the sampling cup 310 can be customized according to the size of the aerosol sampler and the amount of sample taken.

[0076] Biosafety solutions offer two key advantages: first, the sampling medium, namely sampling solution 311, can rapidly inactivate pathogenic microorganisms of all types, rendering them inactive; second, the sampling medium allows for nucleic acid extraction from pathogenic microorganisms, enabling direct use as a template for nucleic acid amplification after sampling, thus avoiding secondary aerosol contamination caused by the nucleic acid extraction process. Therefore, using biosafety solutions can improve sampling efficiency to some extent.

[0077] like Figure 9 As shown, in an embodiment of the present invention, a spiral protrusion 211 is formed on the inner wall of the turbulence member 210, and the spiral protrusion 211 is close to the port where the turbulence member 210 connects to the sampling cup 310. Air enters the airflow assembly 20 through the air inlet 280. When air flows through the turbulence member 210 in the airflow assembly 20, under the guidance of the spiral protrusion 211 on the inner wall of the turbulence member 210, the irregularly moving gas in the outside can be transformed into a vortex-shaped regularly moving gas with a uniform flow rate and velocity within the turbulence member 210; that is, the gas is converted into a turbulent state. The spiral protrusion 211 being close to the port where the turbulence member 210 connects to the sampling cup 310 better ensures that the airflow maintains a stable turbulent state when entering the sampling cup 310 from the turbulence member 210. It should be noted that the spiral protrusion 211 can be a continuous protrusion or a discontinuous protrusion structure.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aerosol sampler, characterized in that, include: A housing (10) having a cavity formed within it; The airflow assembly (20) is disposed in the cavity. The airflow assembly (20) includes an air inlet (280) and an air outlet (290). The housing (10) has mounting holes that match the air inlet (280) and the air outlet (290). The airflow assembly (20) also includes a first pipe (220), a second pipe (230), and a fan (240). The airflow assembly (20) includes a turbulence element (210), which is disposed on the first duct (220); A sampling assembly is disposed in the cavity. The sampling assembly includes a sampling cup (310). The cavity of the sampling cup (310) is an inverted cone structure. The sampling cup (310) is connected to the turbulence member (210). A spiral protrusion (211) is formed on the inner wall of the turbulence member (210), and the spiral protrusion (211) is close to the port where the turbulence member (210) is connected to the sampling cup (310); The first pipe (220) includes a first main body (221) and a second main body (222), which are connected by a 90-degree bend. The turbulence element (210) is connected to the first main body (221), and the fan (240) is connected to the second main body (222). The pipe inner diameter of the first pipe (220) and the specific structural parameters of the first main body (221) and the second main body (222) are defined as follows: The inner diameter d of the pipeline is: d≥ ; The length L1 of the first main body is: 2d ≥ L1 ≥ 3d; The length L2 of the second main body is: L2 ≥ d; Where Q is the gas flow rate and V is the gas velocity.

2. The aerosol sampler according to claim 1, characterized in that, The first pipe (220) is connected to the air inlet (280), the second pipe (230) is connected to the air outlet (290), and the first pipe (220) and the second pipe (230) are connected through the fan (240).

3. The aerosol sampler according to claim 2, characterized in that, The airflow assembly (20) also includes a gas flow meter (250), which is disposed on the second pipe (230).

4. The aerosol sampler according to claim 1, characterized in that, The sampling assembly also includes a waterproof component (320), which is disposed at the connection position between the first pipe (220) and the turbulence component (210).

5. The aerosol sampler according to claim 1, characterized in that, The airflow assembly (20) further includes a noise reduction and silencing component (260), which is disposed at the air outlet (290).

6. The aerosol sampler according to claim 5, characterized in that, The airflow assembly (20) further includes a particle interception filter (270), which is disposed on the noise reduction and sound absorption component (260) and is located away from the cavity.

7. The aerosol sampler according to any one of claims 1-6, characterized in that, The aerosol sampler also includes a sterilization component, which is disposed at the connection position between the sampling cup (310) and the turbulence element (210).

8. The aerosol sampler according to claim 7, characterized in that, The sterilization component includes a sterilization lamp (410) and a sterilization controller (420), wherein the sterilization controller (420) is electrically connected to the sterilization lamp (410).

9. The aerosol sampler according to any one of claims 1-6, characterized in that, The aerosol sampler also includes a control component adapted to monitor and control the operating status of the aerosol sampler.

10. The aerosol sampler according to any one of claims 1-6, characterized in that, The sampling cup (310) is engaged with the turbulence component (210); The sampling cup (310) contains a sampling solution (311), which is a biosafe solution.

Images