Liquid aerosol sampling device

Abstract

A liquid aerosol sampling device, comprising: a sampling assembly (1), a swirl-flow assembly (2) and a condensation cylinder (3), the sampling assembly (1) being configured to collect a liquid aerosol sample in an environment and reduce large droplets in the liquid aerosol sample, and the swirl-flow assembly (2) comprising a centrifugal tube (21) and a swirl-flow column (22), wherein the centrifugal tube (21) is configured to collect a condensate; the swirl-flow column (22) is accommodated in the centrifugal tube (21); a vertically run-through straight-flow channel (221) is formed inside the swirl-flow column (22), and a helical part (223) is provided outside the swirl-flow column (22); a swirl-flow channel is formed between the helical part (223) and the centrifugal tube (21); the upper end of the straight-flow channel (221) is adapted to receive the liquid aerosol sample from the sampling assembly (1), and the straight-flow channel (221) is in communication with the swirl-flow column (22) below the swirl-flow column (22) to enable the liquid aerosol sample to enter the swirl-flow channel; and the liquid aerosol sample passes through the straight-flow channel (221) and the swirl-flow channel for condensation to obtain a condensate, the condensed aerosol is output from the upper portion of the swirl-flow channel, and the straight-flow channel (221) and the lower portion of the swirl-flow channel are configured to guide the condensate into the centrifugal tube (21). The liquid aerosol sampling device is miniaturized and portable, and has an enhanced condensation effect.

Description

Liquid aerosol sampling device Technical Field

[0001] At least one embodiment of the present disclosure relates to a sampling device, and in particular to a liquid aerosol sampling device. Background Art

[0002] An aerosol is a gaseous dispersion system composed of solid or liquid particles suspended in a gaseous medium. The human environment is a large aerosol system. Liquid aerosol sampling can provide valuable component samples for fields such as medicine, environmental science, and biology. Separating and analyzing the suspended droplets and aerosol within a liquid aerosol system can effectively understand their composition.

[0003] In related technologies, liquid aerosol composition detection can achieve non-invasive analysis of the lower respiratory lining fluid of organisms and can also be used to assess microbial contamination in the air, such as detecting pathogenic microorganisms and allergens, which is of great significance for the early diagnosis of diseases and the control of the spread of infectious diseases. Liquid aerosol composition can also be used to monitor pollutants in the atmosphere, such as the content of partially water-soluble volatile organic compounds (VOCs), which is crucial for assessing air quality, understanding pollution sources, and formulating environmental protection policies. In addition, liquid aerosol composition detection can also be used to study the impact of aerosols on climate change and ecosystems, such as studying the impact of aerosols on precipitation patterns and plant growth. In botanical research, liquid aerosol composition detection can be used to study the composition and production pathways of plant volatile substances, thereby understanding the metabolic differences and adaptability between different plants. In addition, liquid aerosol composition detection can also be used to study the characteristics and content of volatile organic compounds produced in biological processes such as cell culture and bioreactors.

[0004] Existing liquid aerosol condensate collection devices are greatly affected by temperature. It is difficult for traditional condensation devices to achieve the effect of overall temperature uniformity. Active cooling is performed at the uneven temperature of the condensation pipeline to form a local condensation environment. The liquid aerosol simply and directly enters the centrifuge tube, and the part close to the boundary layer is locally condensed on the inner wall of the centrifuge tube under uncontrolled motion conditions, which is not conducive to achieving a better condensation effect. If spiral or curved tube condensation is used, the liquid aerosol is first condensed through a section of curved tube before entering the centrifuge tube. The centrifuge tube is only used for liquid collection, which is not conducive to achieving a better device miniaturization. If the swirl condensation method is introduced, the liquid aerosol needs to pass through a section of curved tube to induce swirl when entering the centrifuge tube, and the part close to the boundary layer is locally condensed on the inner wall of the centrifuge tube under the action of the swirl. Although better device miniaturization is achieved, the swirl effect in the centrifuge tube weakens as the distance from the swirl inducing position increases, which is not conducive to condensation separation.

[0005] Summary of the Invention

[0006] In view of this, in order to solve at least one technical problem in the related art and other aspects, the present disclosure proposes a liquid aerosol sampling device, including: a sampling component, a cyclone component and a condensation barrel.

[0007] According to an embodiment of the present disclosure, the sampling assembly is configured to collect a liquid aerosol sample in an environment and remove large droplets from the liquid aerosol sample.

[0008] According to an embodiment of the present disclosure, a cyclone assembly includes a centrifuge tube and a cyclone column. The centrifuge tube is configured to collect condensate, and the cyclone column is housed in the centrifuge tube. A vertical through-flow channel is formed inside the cyclone column, and a spiral is provided on the outside. A cyclone channel is formed between the spiral and the inner wall of the centrifuge tube. The upper end of the direct flow channel is adapted to receive a liquid aerosol sample from the sampling assembly. The direct flow channel is connected to the cyclone channel below the cyclone column to allow the liquid aerosol sample to enter the cyclone channel. The liquid aerosol sample is condensed through the direct flow channel and the cyclone channel to obtain condensate. The upper portion of the cyclone channel outputs the condensed aerosol, and the lower portions of the direct flow channel and the cyclone channel are used to drain the condensate into the centrifuge tube.

[0009] According to an embodiment of the present disclosure, the condensing barrel is suitable for accommodating a cyclone assembly to provide a condensing environment for the cyclone assembly under a pre-cooling condition.

[0010] According to an embodiment of the present disclosure, the cyclone assembly further includes a cover body, which is sealedly coupled to the upper ends of the centrifuge tube and the cyclone column, and is provided with an inlet connected to the direct current channel and adapted to receive the liquid aerosol sample, and an outlet connected to the cyclone channel and adapted to output the aerosol.

[0011] According to an embodiment of the present disclosure, the swirl column includes a cylindrical portion and conical portions provided at both ends of the cylindrical portion, and the lower end of the centrifuge tube is provided in a cone shape that matches the conical portion at the lower end of the swirl column.

[0012] According to an embodiment of the present disclosure, a sampling assembly includes a sampling head, a processing unit, and an output terminal. The sampling head is adapted to continuously sample a liquid aerosol sample from the environment; the processing unit is configured to remove large droplets from the liquid aerosol sample to produce a liquid aerosol sample in the form of small droplets; and the output terminal is configured to deliver the liquid aerosol sample in the form of small droplets from the processing unit to a cyclone column.

[0013] According to an embodiment of the present disclosure, the processing unit includes a connecting tube and multiple collision plates. The sampling head and processing unit are formed at both ends of the connecting tube. The multiple collision plates are arranged diagonally and staggered in the axial direction of the connecting tube to form a Tesla valve and are assembled and installed in the connecting tube. This allows large droplets in the liquid aerosol sample to be removed after multiple collisions with the collision plates in the turbulent flow generated by the Tesla valve, resulting in a liquid aerosol sample in the form of small droplets.

[0014] According to an embodiment of the present disclosure, the sampling head includes a flat sampling head suitable for sampling through oral exhalation, a spherical sampling head suitable for sampling through nasal exhalation, or a tubular sampling head for sampling ambient gas.

[0015] According to an embodiment of the present disclosure, a condensation barrel includes a barrel-shaped shell and a barrel-shaped inner liner. The barrel-shaped inner liner is housed in the shell, and a cyclone assembly is inserted into the inner liner. A refrigerant medium is contained within the sidewalls of the inner liner to provide a low-temperature environment for the cyclone assembly, thereby promoting condensation of droplets in a liquid aerosol sample.

[0016] According to an embodiment of the present disclosure, the condensing drum further includes a locking mechanism for locking the inner container in the shell to prevent the inner container from rotating in the shell.

[0017] According to an embodiment of the present disclosure, the locking mechanism includes a locking hole, a locking slot, and a locking pin, wherein the locking hole is provided at the lower portion of the housing; the locking slot is provided at the bottom outer side of the inner container; and the locking pin passes through the locking hole and is radially inserted into the locking slot.

[0018] According to an embodiment of the present disclosure, a filling port is provided in the locking groove, and the refrigerant medium is input into the side wall of the inner tank or discharged through the filling port. The locking pin abuts against the plug for sealing the filling port to prevent the plug from detaching from the filling port.

[0019] According to the embodiments of the present disclosure, a liquid aerosol condensation device is directly connected to a centrifuge tube, achieving miniaturization and portability. The condensation path is divided into a direct flow channel and a swirl channel. The liquid aerosol undergoes continuous spiral motion through the swirl channel, formed by the gap between the swirl column and the inner wall of the centrifuge tube, which helps enhance the condensation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic structural diagram of a swirl assembly according to an embodiment of the present disclosure;

[0021] FIG2 is a schematic diagram of the structure of a swirl column in an embodiment of the present disclosure;

[0022] FIG3 is a schematic diagram of the structure of a centrifuge tube in an embodiment of the present disclosure;

[0023] FIG4 is a schematic cross-sectional view of a swirl assembly according to an embodiment of the present disclosure;

[0024] FIG5 is a schematic diagram of the structure of an environmental sampling component in an embodiment of the present disclosure;

[0025] FIG6 is a schematic cross-sectional view of the structure of the environmental sampling assembly according to an embodiment of the present disclosure;

[0026] FIG7 is a schematic diagram of the structure of an oral exhaled breath sampling assembly according to an embodiment of the present disclosure;

[0027] FIG8 is a schematic cross-sectional view of the structure of the oral exhaled breath sampling assembly according to an embodiment of the present disclosure;

[0028] FIG9 is a schematic diagram of the structure of the nasal breath sampling assembly in an embodiment of the present disclosure;

[0029] FIG10 is a schematic cross-sectional view of the nasal breath sampling assembly structure in an embodiment of the present disclosure;

[0030] FIG11 is a schematic diagram of the structure of a condensation barrel in an embodiment of the present disclosure;

[0031] FIG12 is a schematic diagram of the inner structure of the condensing barrel in an embodiment of the present disclosure;

[0032] FIG13 is a schematic diagram of the structure of the condensation barrel shell in an embodiment of the present disclosure; and

[0033] FIG14 is a schematic diagram of the cross-sectional structure of the condensation barrel in an embodiment of the present disclosure.

[0034] [Reference Symbols] 1. Sampling assembly; 11. Sampling head; 111. Flat sampling head; 112. Spherical sampling head; 113. Tubular sampling head; 12. Processing unit; 121. Connecting tube; 122. Collision plate; 13. Output end; 2. Cyclone assembly; 21. Centrifuge tube; 211. Centrifuge tube thread; 22. Cyclone column; 221. Cyclone column cavity; 222. Cyclone column outlet; 223. Cyclone column spiral; 23. Cover; 231. Liquid aerosol inlet; 232. Liquid aerosol outlet; 233. Cap; 234. Cover thread; 3. Condensate barrel; 31. Shell; 32. Inner liner; 321. Filling port; 322. Plug; 33. Locking mechanism; 331. Locking hole; 332. Locking groove; 333, locking pin; and 34, centrifuge tube slot. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0036] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0037] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0038] It should also be noted that directional terms such as "upper," "lower," "front," "back," "left," and "right" mentioned in the embodiments are merely references to the directions in the accompanying drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, identical elements are represented by identical or similar reference numerals. Conventional structures or configurations are omitted where they may cause confusion in understanding the present disclosure, and the shapes and dimensions of the components in the drawings do not reflect actual size or proportion, but are merely illustrative of the embodiments of the present disclosure.

[0039] Furthermore, unless otherwise specified, the structural compositions of this disclosure are not limited to those listed herein and may be varied or rearranged according to desired designs. Furthermore, the above-described embodiments may be mixed and matched with one another or with other embodiments based on design and reliability considerations. That is, the technical features of different embodiments may be freely combined to form further embodiments.

[0040] Existing liquid aerosol condensate collection devices use an active cooling strategy in the condensation line to create a localized condensation environment. Therefore, while emphasizing the device's miniaturization and ease of use, it can be used by connecting it to a centrifuge tube. In the present disclosure, the liquid aerosol sampling device is connected to a centrifuge tube to achieve device miniaturization. At the same time, the centrifuge tube, as part of its own condensation line, creates a localized condensation environment at the centrifuge tube through low temperatures. This, combined with the internal direct current and swirl channels, shields the effects of temperature unevenness, achieving condensation separation of the liquid aerosol.

[0041] The term "Tesla valve" used in this disclosure is a one-way flow valve that has no moving parts and only uses a spatial structure to promote gas flow, and can achieve the one-way flow characteristics of the fluid without inputting energy.

[0042] The present disclosure provides a liquid aerosol sampling device, comprising: a sampling component 1, a cyclone component 2 and a condensation barrel 3.

[0043] According to an embodiment of the present disclosure, the sampling assembly 1 is configured to collect a liquid aerosol sample in an environment and disperse large droplets in the liquid aerosol sample.

[0044] FIG1 is a schematic diagram of the structure of a cyclone assembly in an embodiment of the present disclosure, FIG2 is a schematic diagram of the structure of a cyclone column in an embodiment of the present disclosure, FIG3 is a schematic diagram of the structure of a centrifuge tube in an embodiment of the present disclosure, and FIG4 is a schematic diagram of the cross-sectional structure of a cyclone assembly in an embodiment of the present disclosure;

[0045] According to an embodiment of the present disclosure, as shown in Figures 1 to 4, the cyclone assembly 2 includes a centrifuge tube 21 and a cyclone column 22. The centrifuge tube 21 is configured to collect condensate, and the cyclone column 22 is housed in the centrifuge tube 21. The interior of the cyclone column 22 forms a cyclone column cavity 221 that runs through the top and bottom, i.e., a direct current channel. A cyclone column spiral 223 is provided on the outside of the cyclone column 22, and a cyclone channel is formed between the cyclone column spiral 223 and the inner wall of the centrifuge tube 21. The upper end of the direct current channel is suitable for receiving a liquid aerosol sample from the sampling assembly 1. The direct current channel and the cyclone channel are connected through the cyclone column outlet 222 below the cyclone column 22, so that the liquid aerosol sample enters the cyclone channel. The liquid aerosol sample is condensed through the direct current channel and the cyclone channel to obtain a condensate. The upper part of the cyclone channel outputs the condensed aerosol, and the lower parts of the direct current channel and the cyclone channel are used to drain the condensate into the centrifuge tube.

[0046] In an illustrative embodiment, the swirl column 22 and the centrifuge tube 21 are engaged with each other through the swirl column spiral 223 and the centrifuge tube thread 211 .

[0047] According to the embodiments of the present disclosure, swirl column cavity 221 serves to enlarge the cross-sectional area of ​​the direct current channel, thereby reducing the flow rate of the liquid aerosol. Furthermore, its spindle-shaped structure features a smooth transition, which reduces the collision loss of initial condensation nuclei on the inner wall of the swirl column cavity at low temperatures, thus facilitating the condensation process in the centrifuge tube.

[0048] According to an embodiment of the present disclosure, the condensing barrel 3 is adapted to accommodate the cyclone assembly 2 to provide a condensing environment for the cyclone assembly 2 under a pre-cooling condition.

[0049] According to the embodiments of the present disclosure, other external refrigerants or cold trap devices may be selected according to actual applications, for example, semiconductor refrigeration or liquid nitrogen refrigeration may be selected as the cold source.

[0050] According to the embodiment of the present disclosure, the liquid aerosol enters the centrifuge tube 21 through the swirl column outlet 222 and makes continuous spiral motion in the gap between the swirl column spiral 223 and the inner wall of the centrifuge tube 21. At this time, it has a velocity component tangential to the wall of the centrifuge tube 21, which makes it easier for the microdroplets in the liquid aerosol sample to move toward the boundary layer at the inner wall of the centrifuge tube 21 in a low-temperature state, which is beneficial to enhancing the condensation effect.

[0051] According to the embodiments of the present disclosure, the liquid aerosol condensation device is directly connected to the centrifuge tube 21, achieving miniaturization and portability. The condensation path is divided into a direct flow channel and a swirl channel. The liquid aerosol undergoes continuous spiral motion through the swirl channel formed by the gap between the swirl column spiral 223 and the inner wall of the centrifuge tube 21, which helps enhance the condensation effect.

[0052] According to an embodiment of the present disclosure, the cyclone assembly 2 further includes a cover 23 and a cap 233. The cover 23 is sealedly coupled to the upper ends of the centrifuge tube 21 and the cyclone column 22. The cover 23 is provided with an inlet 231 connected to the direct current channel and adapted to receive a liquid aerosol sample, and an outlet 232 connected to the cyclone channel and adapted to output aerosol.

[0053] According to an embodiment of the present disclosure, the cap plug 233 is used to block the liquid aerosol inlet 231 and the liquid aerosol outlet 232 to prevent impurities from entering the swirl column 22 .

[0054] According to an embodiment of the present disclosure, the liquid aerosol inlet 231 is located at the center of the cover 23, and the liquid aerosol outlet 232 is located at the outer edge of the cover 23. During use, active suction is performed on the liquid aerosol outlet 232 to provide power for liquid aerosol sampling and flow.

[0055] According to an embodiment of the present disclosure, the swirl column 22 includes a cylindrical portion and tapered portions provided at both ends of the cylindrical portion, and the lower end of the centrifuge tube 21 is configured to be tapered to match the tapered portion at the lower end of the swirl column 22 .

[0056] According to an embodiment of the present disclosure, the spindle-shaped direct current channel in the swirl column cavity 221 provides a variable diameter conveying cross-section for the moving route of the liquid aerosol sample, which is beneficial to reducing the flow rate of the liquid aerosol sample in the middle section area that occupies most of the space in the direct current channel, and at the same time reducing the collision loss of small droplets serving as initial condensation nuclei caused by turbulence when the liquid aerosol sample is introduced into the direct current channel.

[0057] According to the embodiment of the present disclosure, after sampling is completed, the cyclone column 22 and sampling assembly 1 are removed, the cover 23 is screwed into engagement with the centrifuge tube 21, and the liquid aerosol inlet 231 and the liquid aerosol outlet 232 are sealed with the cap 233 to prevent impurities from entering the condensate. The centrifuge tube 21 is placed in a centrifuge for centrifugation, and the condensate at the bottom of the centrifuge tube 21 is collected and properly stored.

[0058] According to an embodiment of the present disclosure, under the premise that no subsequent centrifugation operation is required, the centrifuge tube 21 can be replaced with a liquid storage tube, a collection tube or a sample tube that is compatible with the device.

[0059] 5 and 6 are schematic diagrams of the structure and cross-section of the environmental sampling assembly in an embodiment of the present disclosure.

[0060] 7 and 8 are schematic structural diagrams and cross-sectional structural diagrams of the oral exhaled breath sampling assembly in an embodiment of the present disclosure.

[0061] Figures 9 and 10 are schematic structural diagrams and cross-sectional structural diagrams of the nasal exhalation sampling assembly in an embodiment of the present disclosure.

[0062] According to an embodiment of the present disclosure, as shown in Figures 5 to 10, the sampling assembly 1 includes a sampling head 11, a processing unit 12, and an output port 13. The sampling head 11 is adapted to continuously sample a liquid aerosol sample from the environment; the processing unit 12 is configured to remove large droplets from the liquid aerosol sample to obtain a liquid aerosol sample in the form of small droplets; and the output port 13 is configured to transport the liquid aerosol sample in the form of small droplets from the processing unit to the cyclone column 22.

[0063] According to an embodiment of the present disclosure, the processing unit 12 includes a connecting tube 121 and multiple collision plates 122. The sampling head 11 and processing unit 12 are formed at both ends of the connecting tube 121. The multiple collision plates 122 are arranged diagonally and staggered in the axial direction of the connecting tube 121 to form a Tesla valve and are assembled and installed in the connecting tube 121. This allows large droplets in the liquid aerosol sample to be removed after multiple collisions with the collision plates in the turbulent flow caused by the Tesla valve, resulting in a liquid aerosol sample in the form of small droplets.

[0064] According to an embodiment of the present disclosure, large droplets, such as raindrops and flying droplets, may exist in the liquid aerosol sample before condensation. Such large droplets may interfere with component homogeneity and subsequent component analysis.

[0065] According to an embodiment of the present disclosure, the Tesla valve effect is used to induce a turbulent effect in the liquid aerosol sample passing through multiple collision plates 122. After multiple collisions, the large liquid in the liquid aerosol sample is removed as much as possible, and a liquid aerosol sample mainly composed of small liquid is obtained, so as to ensure the homogeneity of the liquid aerosol sample when entering the cyclone component 2.

[0066] According to an embodiment of the present disclosure, multiple collision plates 122 arranged in a diagonally staggered pattern within the processing unit 12 are used to remove large droplets from a liquid aerosol sample. These diagonally staggered internal collision plates 122 facilitate the Tesla valve effect. When the liquid aerosol undergoes negative Tesla valve motion, turbulence is generated, thereby enhancing the collision elimination of large droplets.

[0067] According to an embodiment of the present disclosure, the sampling head 11 includes a flat sampling head 111 suitable for sampling through oral exhalation, a spherical sampling head 112 suitable for sampling through nasal exhalation, or a tubular sampling head 113 for sampling ambient gas.

[0068] According to an embodiment of the present disclosure, the sampling assembly 1 with a different sampling head 11 is replaced according to actual use needs.

[0069] In an illustrative embodiment, for oral exhaled liquid aerosol sampling, a sampling assembly 1 having a flat sampling head 111 is used.

[0070] In an exemplary embodiment, for liquid aerosol sampling of nasal exhaled air, a sampling assembly 1 having a spherical sampling head 112 is used.

[0071] In an illustrative embodiment, for liquid aerosol sampling in an atmospheric environment, a sampling assembly 1 having a tubular sampling head 113 is used, and active suction is performed at the cyclone column outlet 222 to provide sampling power.

[0072] Figure 11 is a schematic diagram of the structure of the condensing barrel in the embodiment of the present disclosure, Figure 12 is a schematic diagram of the structure of the inner tank of the condensing barrel in the embodiment of the present disclosure, Figure 13 is a schematic diagram of the structure of the shell of the condensing barrel in the embodiment of the present disclosure, and Figure 14 is a schematic diagram of the cross-sectional structure of the condensing barrel in the embodiment of the present disclosure.

[0073] According to an embodiment of the present disclosure, as shown in Figures 11 to 14 , the condensation barrel 3 includes a barrel-shaped shell 31 and a barrel-shaped inner liner 32. The barrel-shaped inner liner 32 is housed in the shell, and the cyclone assembly 2 is inserted into the inner liner 32. The sidewalls of the inner liner 32 contain a refrigerant to provide a low-temperature environment for the cyclone assembly 2, thereby promoting the condensation of droplets in the liquid aerosol sample.

[0074] According to the embodiment of the present disclosure, the inner liner of the condensation barrel is filled with a refrigerant medium to ensure that the temperature of the cyclone component is uniform in the radial direction, provide a low temperature environment for the cyclone component 2, and promote the condensation of droplets in the liquid aerosol sample.

[0075] In an illustrative embodiment, the refrigerant medium may be a refrigerant, preferably a polymer refrigerant.

[0076] According to an embodiment of the present disclosure, the condensation barrel 3 further includes a centrifuge tube slot 34 to accommodate the centrifuge tube 21 .

[0077] According to an embodiment of the present disclosure, the condensing barrel 3 further includes a locking mechanism 33 for locking the inner container 32 in the shell 31 to prevent the inner container 32 from rotating in the shell 31 .

[0078] According to an embodiment of the present disclosure, the locking mechanism 33 includes a locking hole 331, a locking slot 332, and a locking pin 333. The locking hole 331 is provided at the lower portion of the housing 31; the locking slot 332 is provided at the bottom outer side of the liner 32; and the locking pin 333 is radially inserted through the locking hole 331 into the locking slot 332.

[0079] According to an embodiment of the present disclosure, a filling port 321 is provided in the locking groove 332, and the refrigerant medium is input into the side wall of the inner tank 32 through the filling port 321 or discharged through the filling port 321. The locking pin 333 abuts against the plug 322 for sealing the filling port 321 to prevent the plug 322 from detaching from the filling port 321.

[0080] According to the embodiment of the present disclosure, the locking mechanism 33 can fix the inner liner 32 to prevent the inner liner from rotating in the condensing barrel, and can also block the filling port 321 of the inner liner 32 to prevent leakage of the refrigerant medium.

[0081] It should be noted that the embodiments described are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present disclosure, other embodiments obtained by ordinary technicians in this field without making creative work are all within the scope of protection of the present disclosure.

[0082] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above are only specific embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A liquid aerosol sampling device, comprising: A sampling assembly configured to collect a liquid aerosol sample in an environment and to remove large droplets from the liquid aerosol sample; Swirl assembly, comprising: a centrifuge tube configured to collect condensate; and A swirl column is contained in the centrifuge tube, wherein a direct current channel is formed inside the swirl column and is provided with a spiral outside, wherein a swirl channel is formed between the spiral and the inner wall of the centrifuge tube, wherein the upper end of the direct current channel is suitable for receiving the liquid aerosol sample from the sampling assembly, wherein the direct current channel is connected to the swirl channel below the swirl column so that the liquid aerosol sample enters the swirl channel, wherein the liquid aerosol sample is condensed through the direct current channel and the swirl channel to obtain the condensate, wherein the upper part of the swirl channel outputs the condensed aerosol, and the lower parts of the direct current channel and the swirl channel are used to drain the condensate into the centrifuge tube; and The condensation barrel is suitable for accommodating the cyclone component to provide a condensation environment for the cyclone component under precooling conditions.

2. The sampling device according to claim 1, wherein: The cyclone assembly also includes a cover body, which is sealed and combined with the upper ends of the centrifuge tube and the cyclone column. The cover body is provided with an inlet connected to the direct current channel and suitable for receiving the liquid aerosol sample, and an outlet connected to the cyclone channel and suitable for outputting the condensed aerosol.

3. The sampling device according to claim 1, wherein: The swirl column comprises a cylindrical portion and conical portions arranged at both ends of the cylindrical portion, and the lower end of the centrifuge tube is arranged to be a cone that matches the conical portion at the lower end of the swirl column.

4. The sampling device according to any one of claims 1 to 3, wherein: The sampling assembly comprises: The sampling head is suitable for continuous sampling of liquid aerosol samples in the environment; a processing unit configured to remove large droplets from the liquid aerosol sample to obtain the liquid aerosol sample in a state of small droplets; and The output end is configured to transport the liquid aerosol sample in the form of small droplets from the processing portion to the cyclone column.

5. The sampling device according to claim 4, wherein: The processing unit comprises: A connecting tube, the sampling head and the processing part are formed at both ends of the connecting tube; and A plurality of collision plates are arranged diagonally and staggered in the axial direction of the connecting tube to form a Tesla valve and are assembled and installed in the connecting tube, so that large droplets in the liquid aerosol sample are removed after multiple collisions with the collision plates in the turbulence caused by the Tesla valve, thereby obtaining the liquid aerosol sample in the form of small droplets.

6. The sampling device according to claim 4, wherein: The sampling head includes a flat sampling head suitable for sampling through oral exhalation, a spherical sampling head suitable for sampling through nasal exhalation, or a tubular sampling head for sampling environmental gas.

7. The sampling device according to any one of claims 1 to 3, wherein: The condensation barrel comprises: a barrel-shaped housing; and A barrel-shaped inner liner is contained in the shell, the cyclone assembly is inserted into the inner liner, and a cold medium is contained in the side wall of the inner liner to provide a low-temperature environment for the cyclone assembly and promote the condensation of droplets in the liquid aerosol sample.

8. The sampling device according to claim 7, wherein: The condensing barrel further includes a locking mechanism configured to lock the inner container in the shell to prevent the inner container from rotating in the shell.

9. The sampling device according to claim 8, wherein: The locking mechanism comprises: A locking hole, disposed at the lower portion of the housing; A locking groove is arranged on the outer side of the bottom of the inner container; and A locking pin is radially inserted into the locking groove through the locking hole.

10. The sampling device according to claim 9, wherein: The locking groove is provided with a filling port, through which the cold medium is input into the side wall of the inner container or discharged. The locking pin abuts against a plug for sealing the filling port to prevent the plug from being disengaged from the filling port.

Images