WO2024207603A1

WO2024207603A1 - Aerosol sampler

Info

Publication number: WO2024207603A1
Application number: PCT/CN2023/095891
Authority: WO
Inventors: 田胜男; 江俊亿
Original assignee: 广东中科智能生物技术有限公司
Priority date: 2023-04-06
Filing date: 2023-05-23
Publication date: 2024-10-10
Also published as: CN116429519A

Abstract

The present application relates to the technical field of biosafety testing, and provides an aerosol sampler. The aerosol sampler comprises a case, a sample container, a turbulence air path assembly, and a fan. A cavity is formed in the case, and air inlets and air outlets are formed in the case; the sample container is detachably connected to the case, and a containing cavity of the sample container is communicated with the cavity; the turbulence air path assembly is provided in the cavity and is detachably connected to the case; the containing cavity of the sample container is of an inverted cone structure, and the turbulence air path assembly abuts against an opening of the containing cavity of the sample container; the fan is provided in the cavity and adapted to cause negative pressure in the cavity. The aerosol sampler provided in the present application optimizes the overall structure, can adapt to the characteristic of diversified dispersed phases in aerosol, increases the collection rate of dispersed phases having different particle sizes and properties, and improves the sampling efficiency and accuracy.

Description

Aerosol Sampler

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application filed with the China Patent Office on April 6, 2023, with application number 202310360837.6 and invention name “Aerosol Sampler”, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of biosafety detection technology, and in particular to an aerosol sampler.

Background Art

Aerosol refers to a gaseous dispersed system composed of solid or liquid particles suspended in a gas medium, in which the gas is the continuous phase and the solid or liquid particles are the dispersed phase. Aerosol has the characteristics of a multiphase fluid.

Aerosols are sampled through an aerosol sampler, and solid or liquid particles in the aerosol are separated for detection and analysis. However, since the dispersed phases composed of solid or liquid particles have different sources and significant differences, the stable continuous phase (gas) and the diverse dispersed phases (solid or liquid particles) in the multiphase fluid have significant differences in fluid behavior.

Aerosol samplers in the prior art usually rely on fixed-mode cyclones to collect aerosols, and lack targeted designs to cover the diverse particle sizes and properties of the dispersed phase, resulting in a reduced collection rate of the dispersed phase with certain particle sizes and properties. In addition, aerosol samplers in the prior art focus on hardware equipment, and fail to design compatibility between equipment characteristics, sampling liquid properties, particulate matter, and subsequent analysis. The sampling components cannot be replaced or reused, affecting the efficiency and accuracy of sampling and analysis.

Summary of the invention

The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application provides an aerosol sampler with an optimized overall structure, which can be adapted to the aerosol sampler. The diversified characteristics of the dispersed phase can improve the collection rate of dispersed phases with different particle sizes and properties, and improve the sampling efficiency and accuracy.

The present application embodiment provides an aerosol sampler, comprising:

A chassis, wherein a cavity is formed in the chassis, and an air inlet and an air outlet are provided on the chassis;

A sampling container, the sampling container is detachably connected to the chassis, and the accommodating chamber of the sampling container is in communication with the cavity;

a turbulent air duct assembly, the turbulent air duct assembly being disposed in the cavity and detachably connected to the chassis;

The containing cavity of the sampling container is an inverted cone structure, and the turbulent air path component abuts against the port of the containing cavity of the sampling container;

The fan is arranged in the cavity and is suitable for forming a negative pressure in the cavity.

According to the aerosol sampler provided in the embodiment of the present application, by providing a turbulent air path component, a broad-spectrum collection of the dispersed phase in the aerosol is achieved, and the turbulent air path component is easy to disassemble, install, and clean, thereby improving the efficiency of aerosol sampling and ensuring the sampling accuracy. Specifically, an air inlet and an air outlet are provided on the chassis, and a through cavity is formed inside the chassis. The turbulent air path component, the cavity of the chassis, and the accommodating cavity of the sampling container jointly form a channel space for the aerosol to circulate inside the container. When the fan is started, a negative pressure is formed in the cavity. The external aerosol enters the turbulent air path component and the accommodating cavity of the sampling container from the air inlet, and the dispersed phase (particulate matter) is collected in the sampling container. The gas after the particle collection flows out through the cavity and the air outlet. Among them, after the aerosol enters the turbulent air path component, it is transformed from an irregular motion state to a regular motion state with uniform flow rate and uniform flow rate, that is, the aerosol is in a turbulent state. When the aerosol in the turbulent state flows directionally into the sampling medium in the sampling container, the aerosol can make turbulent motion along the side wall of the containing cavity of the sampling container together with the sampling medium. The containing cavity is designed as an inverted cone. During the turbulent motion, the aerosol and the sampling medium form wall shear turbulence at different cross sections. The different flow rates at different cross sections can specifically enrich solid or liquid particles of different particle sizes and properties. These particles are adsorbed by the sampling medium and then collected in the sampling medium. At the same time, the turbulent air path component and the sampling container can be disassembled, which is convenient for cleaning and replacement after the collection is completed, so as to keep the turbulent air path component and the sampling container highly clean and pollution-free, facilitate the next collection, prevent the aerosol from being contaminated by secondary pollution, ensure the sampling accuracy, and improve the sampling efficiency. The aerosol sampler provided in the embodiment of the present application optimizes the overall structure. It can adapt to the diverse characteristics of dispersed phases in aerosols, improve the collection rate of dispersed phases with different particle sizes and properties, and improve sampling efficiency and accuracy.

According to one embodiment of the present application, the turbulent air duct assembly includes a turbulence generating element and an air inlet duct, the turbulence generating element is connected to the air inlet duct, the turbulence generating element is embedded in the air inlet duct, and the air inlet end of the air inlet duct faces the air inlet port.

According to one embodiment of the present application, the aerosol sampler also includes a disinfection light source and a disinfection controller. A through hole is opened on the turbulence generating element, the disinfection light source is arranged at the through hole, and the disinfection controller is electrically connected to the disinfection light source.

According to one embodiment of the present application, the turbulent air duct assembly further includes a negative ion generator, and the negative ion generator is disposed in the cavity.

According to one embodiment of the present application, the aerosol sampler further includes a first filter element and a second filter element, the first filter element is arranged at the air inlet, and the second filter element is arranged at the air outlet.

According to one embodiment of the present application, the aerosol sampler further includes a noise reduction and sound silencing component, and the noise reduction and sound silencing component is disposed in the cavity and close to the air outlet.

According to one embodiment of the present application, a sampling liquid is provided in the containing chamber, and the sampling liquid is a biosafety solution.

According to one embodiment of the present application, the aerosol sampler further includes a control component, and the control component is suitable for controlling the working state of the aerosol sampler.

According to one embodiment of the present application, the control component includes a wireless controller, a display screen and a battery, the display screen is arranged on the chassis, the battery is fixed on the outer wall of the chassis, the wireless controller is electrically connected to the display screen, and the battery is suitable for providing electrical energy to the aerosol sampler.

According to an embodiment of the present application, a wall-hanging fixing hole is provided on the chassis.

According to one embodiment of the present application, the structural parameters of the sampling container meet the following conditions:

Wherein, _Eu represents the pressure drop value in the containing cavity of the sampling container (20), in units of Pa; _Re represents the cyclone Reynolds number, D represents the maximum vortex diameter generated in the containing cavity, in units of m; _Dx represents the vortex diameter of the cone angle gradient surface in the containing cavity, in units of m; _Lc represents the cone angle height of the containing cavity, in units of m;

p is the pressure on the fluid micro-unit, in Pa; represent the microscopic variables of the three-dimensional spatial position respectively; τ _xx , τ _yx , τ _zx , τ _xy , τ _zy , τ _xz , τ _yz , τ _yy , τ _zz are the components of the viscous stress τ acting on the surface of the microelement due to the molecular viscosity; f _x , f _y , f _z are the unit mass forces in the x, y and z directions, with the unit of m ² /s; ρ is the fluid density, with the unit of kg/m ³ ; u _x , u _y , u _z are the velocity components in the X, Y and Z directions, with the unit of m/s; t is the time, with the unit of second; is a three-dimensional vector differential operator, Represents the average velocity of the fluid.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of the overall structure of an aerosol sampler provided in an embodiment of the present application;

FIG2 is a schematic diagram of the connection structure between the turbulent air path assembly and the sampling container provided in an embodiment of the present application;

FIG3 is a cross-sectional view of the internal structure of the aerosol sampler provided in an embodiment of the present application;

FIG4 is a second cross-sectional view of the internal structure of the aerosol sampler provided in an embodiment of the present application;

FIG5 is a third cross-sectional view of the internal structure of the aerosol sampler provided in an embodiment of the present application.

Reference numerals:
10. chassis; 110. air inlet; 111. first filter element; 120. air outlet; 121.
Second filter element; 122, noise reduction and silencer; 130, wall-mounted fixing hole;
20. Sampling container;
30. Turbulent air path assembly; 310. Turbulent flow generating element; 320. Air inlet pipeline;
40. Fan;
510, disinfection light source; 520, disinfection controller;
610. Negative ion generator;
710. Display screen; 720. Battery.

DETAILED DESCRIPTION

The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is It indicates that the horizontal height of the first feature is smaller than that of the second feature.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

As shown in Figures 1 to 5, an embodiment of the present application provides an aerosol sampler, which includes a chassis 10, a sampling container 20, a turbulent air duct assembly 30 and a fan 40. A cavity is formed in the chassis 10, and an air inlet 110 and an air outlet 120 are provided on the chassis 10; the sampling container 20 is detachably connected to the chassis 10, and the accommodating cavity of the sampling container 20 is communicated with the cavity; the turbulent air duct assembly 30 is arranged in the cavity and is detachably connected to the chassis 10; the accommodating cavity of the sampling container 20 is an inverted cone structure, and the turbulent air duct assembly 30 abuts against the port of the accommodating cavity of the sampling container 20; the fan 40 is arranged in the cavity and is suitable for forming a negative pressure in the cavity.

The chassis 10 can be a cylindrical tube structure, a square box structure, or other shapes, which are not specifically limited in the embodiments of the present application. A machine base can be set at the bottom of the chassis 10 to play a stabilizing role. The base of the equipment can also be further installed with an anti-slip mat, which can ensure the stability of the aerosol sampler during the sampling process when the aerosol sampler is used on a table. The sampling container 20, that is, a container suitable for containing the sampling medium, is usually in the shape of a cup. In one embodiment of the present application, the lower part of the chassis 10 is provided with a mounting bayonet suitable for installing the sampling container 20, and the sampling container 20 is installed in the lower part of the chassis 10. Correspondingly, the air inlet 110 is opened at a position close to the lower part of the box wall of the chassis 10, and the air outlet 120 is located at the top of the chassis 10, so that the gas can enter from the lower part of the chassis 10, and after the collection of particulate matter in the sampling container 20 is completed, it flows out from the upper part of the chassis 10. The turbulent air path component 30 can convert the irregularly moving gas in the outside world into regularly moving gas with uniform flow rate and uniform flow velocity in the aerosol sampler.

A thread can be set on the end wall of the sampling container 20, and correspondingly, a thread groove is set on the mounting bracket of the chassis 10. The sampling container 20 can be directly screwed onto the chassis 10, and the installation can be achieved conveniently and quickly. When the sampling container 20 needs to be disinfected, replaced, or cleaned, the sampling container 20 can be directly unscrewed, which is simple, time-saving, and labor-saving.

The turbulent air duct assembly 30 can be installed on the chassis 10 by bolting, or embedded in the chassis 10 by snapping, so that the turbulent air duct assembly 30 can be installed and replaced conveniently and quickly, so that the turbulent air duct assembly 30 can be disinfected, replaced and cleaned in time.

According to the aerosol sampler provided in the embodiment of the present application, by providing a turbulent air path component 30, a broad-spectrum collection of the dispersed phase in the aerosol is achieved, and the turbulent air path component 30 is easy to disassemble, install, and clean, thereby improving the efficiency of aerosol sampling and ensuring the sampling accuracy. Specifically, an air inlet 110 and an air outlet 120 are provided on the chassis 10, and a through cavity is formed inside the chassis 10. The turbulent air path component 30, the cavity of the chassis 10, and the accommodating cavity of the sampling container 20 together form a channel space for the aerosol to circulate inside the container. When the fan 40 is started, a negative pressure is formed in the cavity. The external aerosol enters the turbulent air path component 30 and the accommodating cavity of the sampling container 20 from the air inlet 110, and the dispersed phase (particulate matter) is collected in the sampling container 20. The gas after the particle collection flows out through the cavity and the air outlet 120. Among them, after the aerosol enters the turbulent air path component 30, it is transformed from an irregular motion state to a regular motion state with uniform flow rate and uniform flow velocity, that is, the aerosol is in a turbulent state. When the aerosol in the turbulent state flows directionally into the sampling medium in the sampling container 20, the aerosol can move turbulently along the side wall of the receiving cavity of the sampling container 20 together with the sampling medium. The receiving cavity is designed as an inverted cone. During the turbulent motion, the aerosol and the sampling medium form wall shear turbulence on different cross sections. The different flow velocities on different cross sections can specifically enrich solid or liquid particles of different particle sizes and different properties. These particles are adsorbed by the sampling medium and then collected in the sampling medium. At the same time, the turbulent air path component 30 and the sampling container 20 can be disassembled, which is convenient for cleaning and replacement after the collection is completed, so as to keep the turbulent air path component 30 and the sampling container 20 highly clean and pollution-free, which is convenient for the next collection, prevents the aerosol from being contaminated by secondary pollution, ensures the sampling accuracy, and improves the sampling efficiency. The aerosol sampler provided in the embodiment of the present application optimizes the overall structure, can adapt to the diverse characteristics of the dispersed phase in the aerosol, improves the collection rate of the dispersed phase with different particle sizes and properties, and improves the sampling efficiency and accuracy.

As shown in Figures 3 and 4, the aerosol sampler provided in the embodiment of the present application is combined with the turbulent The air flow path component 30 and the sampling container 20 with an inverted cone-shaped receiving chamber adopt a multi-stage wet wall cyclone bioaerosol large flow sampling technology, that is, the cyclone forms a multi-stage wet wall cyclone with different flow rates on different cross sections, and pathogenic microorganisms of different particle sizes will form gas-liquid fusion and efficient collection on the most suitable cross section, avoiding damage to the microorganisms by liquid impact sampling technology.

As shown in FIGS. 2 to 4 , in the embodiment of the present application, the turbulent air path assembly 30 includes a turbulent flow generating member 310 and an air inlet duct 320. The turbulent flow generating member 310 is in communication with the air inlet duct 320. The turbulent flow generating member 310 is embedded in the air inlet duct 320, and the air inlet end of the air inlet duct 320 faces the air inlet port 110. The aerosol enters the turbulent flow generating member 310 from the air inlet port 110 through the air inlet duct 320 and is converted into a turbulent state. The turbulent flow generating member 310 is in communication with the containing cavity of the sampling container 20, and the aerosol in the turbulent state enters the sampling container 20, where the particles are collected.

Furthermore, the turbulence generating element 310 is embedded in the air inlet duct 320, which fully reduces the space occupied by the turbulent air duct assembly 30. At the same time, the turbulence generating element 310 and the air inlet duct 320 are embedded in each other to form a whole, which is convenient for the disassembly, replacement and cleaning of the turbulence generating element 310 and the air inlet duct 320, thereby avoiding internal structure contamination and sample cross-contamination caused by high-risk environments or high-frequency sampling.

In an embodiment of the present application, the opening size of the air inlet duct 320 can be increased to prevent particles from hitting the pipe wall during high-speed movement, resulting in low sampling efficiency. In addition, a spiral protrusion can be set on the inner wall of the turbulence generating member 310, and the spiral protrusion is close to the port where the turbulence generating member 310 is connected to the sampling container 20. When air enters the turbulence generating member 310 from the air inlet duct 320, under the guidance of the spiral protrusion on the inner wall of the turbulence generating member 310, the irregularly moving gas in the outside world can be converted into a vortex-shaped regular moving gas with uniform flow rate and flow velocity in the turbulence generating member 310, that is, the gas is converted into a turbulent state. The spiral protrusion is close to the port where the turbulence generating member 310 is connected to the sampling container 20, which can better ensure that the airflow maintains a stable turbulent state when the turbulence generating member 310 enters the sampling container 20. The spiral protrusion can be a continuous protrusion or a discontinuous protrusion structure.

As shown in FIG. 4 , in the embodiment of the present application, the aerosol sampler further includes a sterilization light source 510 and a sterilization controller 520. A through hole is provided on the turbulence generating element 310, the sterilization light source 510 is arranged at the through hole, and the sterilization controller 520 is electrically connected to the sterilization light source 510. The light emitted by the sterilization light source 510 can sterilize microorganisms such as bacteria and viruses. The line coverage is wide, and disinfection can be fully realized without leaving any dead corners. The disinfection controller 520 is used to receive disinfection instructions and control the opening, opening duration, opening brightness, closing and other states of the disinfection light source 510. The disinfection light source 510 can be an ultraviolet disinfection lamp, which is not specifically limited in the embodiment of the present application.

As shown in Fig. 3, in the embodiment of the present application, the turbulent air path assembly 30 further includes a negative ion generator 610, which is disposed in the cavity. The negative ion generator 610 can generate negative ions, which can have a positive effect on aerosol sampling, that is, particles in the gas, such as microorganisms, are generally positively charged, while negative ions are negatively charged, and the positive and negative charges attract each other to cause the microorganisms suspended in the air to condense into agglomerates, thereby being more easily collected by the sampling medium.

As shown in Fig. 1 and Fig. 3, in the embodiment of the present application, the aerosol sampler further includes a first filter 111 and a second filter 121, wherein the first filter 111 is arranged at the air inlet 110, and the second filter 121 is arranged at the air outlet 120. The first filter 111 can filter the gas at the air inlet 110 to prevent small insects or small debris and other non-collection objects from entering the aerosol sampler, and the second filter 121 can intercept residual particles in the gas to prevent them from overflowing and causing pollution burden to the external environment.

As shown in FIGS. 3 and 4 , in the embodiment of the present application, the aerosol sampler further includes a noise reduction and silencer 122, which is arranged in the cavity and near the air outlet 120. The noise reduction and silencer 122 can absorb the noise generated when the gas flows. The noise reduction and silencer 122 is arranged near the air outlet 120, so that when the aerosol sampler is working, the noise will not expand outward and will not cause noise interference to the outside world.

In an embodiment of the present application, a sampling liquid is provided in the accommodating chamber, and the sampling liquid is a biosafety solution. On the one hand, the biosafety solution can quickly inactivate pathogenic microorganisms of all properties and make them lose their propagation activity; on the other hand, the biosafety solution can extract nucleic acids from pathogenic microorganisms, and after sampling, it can be directly used as a template for nucleic acid amplification, avoiding secondary contamination of aerosols caused by the nucleic acid extraction process. Therefore, the use of a biosafety solution can also improve the efficiency of sampling to a certain extent, ensure the sampling accuracy, integrate the collection of particles in the aerosol with the subsequent detection end link, which is suitable for preserving inactivated pathogenic microorganisms and convenient for subsequent rapid microbial screening and transportation and storage of samples.

In an embodiment of the present application, the aerosol sampler further includes a control component. Suitable for controlling the working state of the aerosol sampler. The control component is used to obtain the working state parameters of the aerosol sampler, issue corresponding control commands, etc. Through the control component, an Internet of Things system with remote management and networking collaboration can be established, and the wireless communication network is used to upload data signals to the remote management platform. Data information can be transmitted over long distances to coordinate networking and monitor the Internet of Things, realizing regional aerosol situation analysis and biosafety status perception, with stronger performance.

As shown in Figures 1 and 3, in an embodiment of the present application, the control component includes a wireless controller, a display screen 710 and a battery 720. The display screen 710 is arranged on the chassis 10, and the battery 720 is fixed on the outer wall of the chassis 10. The wireless controller is electrically connected to the display screen 710, and the battery 720 is suitable for providing power to the aerosol sampler. In order to facilitate monitoring the operating status of the aerosol sampler, the control component is provided with a display screen 710 on the front of the chassis 10, and the operating parameters and status of the aerosol sampler can be viewed or monitored in real time. The battery 720 is suitable for providing power to the aerosol sampler. In order to facilitate the replacement of the battery 720, a battery cover that is easy to open can be provided on the back of the chassis 10. The control component is linked to the wireless communication network, and the signal output is strong and stable. In order to facilitate the analysis of the overall aerosol distribution situation in the area, the data information of multiple devices are connected in series and coordinated through the Internet of Things system management and networking coverage.

Furthermore, a power cord with a plug can be left in the control component, so that the power connection method is not single. The power cord can be used whenever you want, and the battery 720 can be used in mobile scenarios or to deal with sudden power failures of the aerosol sampler, save the running data and continue the work process, so that the collected data is complete without packet loss.

As shown in Figures 1 and 3, in the embodiment of the present application, a wall-hanging fixing hole 130 is provided on the chassis 10. By providing the wall-hanging fixing hole 130, the aerosol sampler can be hung on the wall or fixed on a mobile column, which is smart in design and easy to carry, diversifies the application scenarios of the aerosol sampler and enhances its applicability.

In the embodiment of the present application, the structural parameters of the sampling container 20 meet the following conditions:

Wherein, _Eu represents the pressure drop value in the containing chamber of the sampling container 20, in Pa; _Re represents the cyclone Reynolds number, D represents the maximum vortex diameter generated in the containing chamber, in m; _Dx represents the vortex diameter of the cone angle gradient surface in the containing chamber, in m; _Lc represents the cone angle height of the containing chamber, in m;

As shown in FIG5 , the cone length and cone angle of the accommodating cavity of the sampling container 20 have a significant impact on the three-dimensional flow field of the gas in the sampling container 20. In order to ensure the aerosol sampling efficiency, through the above calculation, the threaded joint diameter D ₀ of the sampling container 20, the threaded joint height H ₀ of the sampling container 20, the inner wall cone angle β ₀ of the sampling container 20, and the inner wall cone height H ₁ of the sampling container 20 and other structural features can be limited, and the gas flow field in the sampling container 20 can be optimized and designed. The structure of the sampling container 20 can be determined by combining the above multiple parameters to ensure the aerosol sampling efficiency.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

An aerosol sampler, characterized by comprising:

A chassis (10), wherein a cavity is formed in the chassis (10), and an air inlet (110) and an air outlet (120) are provided on the chassis (10);

A sampling container (20), the sampling container (20) being detachably connected to the chassis (10), and the accommodating cavity of the sampling container (20) being in communication with the cavity;

a turbulent air duct assembly (30), the turbulent air duct assembly (30) being arranged in the cavity and detachably connected to the chassis (10);

The accommodating cavity of the sampling container (20) is an inverted cone-shaped structure, and the turbulent air path component (30) abuts against the port of the accommodating cavity of the sampling container (20);

A fan (40) is arranged in the cavity and is suitable for forming a negative pressure in the cavity.
The aerosol sampler according to claim 1 is characterized in that the turbulent air path assembly (30) includes a turbulence generating element (310) and an air inlet pipeline (320), the turbulence generating element (310) is connected to the air inlet pipeline (320), the turbulence generating element (310) is embedded in the air inlet pipeline (320), and the air inlet end of the air inlet pipeline (320) faces the air inlet port (110).
The aerosol sampler according to claim 2 is characterized in that the aerosol sampler also includes a sterilization light source (510) and a sterilization controller (520), a through hole is opened on the turbulence generating element (310), the sterilization light source (510) is arranged at the through hole, and the sterilization controller (520) is electrically connected to the sterilization light source (510).
The aerosol sampler according to claim 1 is characterized in that the turbulent air path component (30) further includes a negative ion generator (610), and the negative ion generator (610) is arranged in the cavity.
The aerosol sampler according to claim 1, characterized in that the gas The sol sampler further comprises a first filter element (111) and a second filter element (121), wherein the first filter element (111) is arranged at the air inlet (110), and the second filter element (121) is arranged at the air outlet (120).
The aerosol sampler according to claim 1 is characterized in that the aerosol sampler also includes a noise reduction and silencer (122), and the noise reduction and silencer (122) is arranged in the cavity and close to the air outlet (120).
The aerosol sampler according to any one of claims 1 to 6 is characterized in that a sampling liquid is provided in the accommodating chamber, and the sampling liquid is a biosafe solution.
The aerosol sampler according to any one of claims 1 to 6 is characterized in that the aerosol sampler further comprises a control component, and the control component is suitable for controlling the working state of the aerosol sampler.
The aerosol sampler according to claim 8 is characterized in that the control component includes a wireless controller, a display screen (710) and a battery (720), the display screen (710) is arranged on the chassis (10), the battery (720) is fixed on the outer wall of the chassis (10), the wireless controller is electrically connected to the display screen (710), and the battery (720) is suitable for providing electrical energy to the aerosol sampler.
The aerosol sampler according to any one of claims 1 to 6 is characterized in that a wall-hanging fixing hole (130) is provided on the chassis (10).
The aerosol sampler according to any one of claims 1 to 6, characterized in that the structural parameters of the sampling container (20) meet the following conditions:

Wherein, Eu represents the pressure drop value in the containing cavity of the sampling container (20), in units of Pa; Re represents the cyclone Reynolds number, D represents the maximum vortex diameter generated in the containing cavity, in units of m; Dx represents the vortex diameter of the cone angle gradient surface in the containing cavity, in units of m; Lc represents the cone angle height of the containing cavity, in units of m;

p is the pressure on the fluid micro-unit, in Pa; represent the microscopic variables of the three-dimensional spatial position respectively; τ xx , τ yx , τ zx , τ xy , τ zy , τ xz , τ yz , τ yy , τ zz are the components of the viscous stress τ acting on the surface of the microelement due to the molecular viscosity; f x , f y , f z are the unit mass forces in the x, y and z directions, with the unit of m 2 /s; ρ is the fluid density, with the unit of kg/m 3 ; u x , u y , u z are the velocity components in the X, Y and Z directions, with the unit of m/s; t is the time, with the unit of second; is a three-dimensional vector differential operator, Represents the average velocity of the fluid.