Microplastic aerosol collection device

Abstract

The micro plastic aerosol collecting device relates to the technical field of micro plastic aerosol collection and comprises a sample inlet chamber, a sampling assembly, a collecting assembly and a base. The sampling assembly comprises a loop impactor and a loop impactor seat fixedly connected. The sample outlet end of the sample inlet chamber is connected with the upper end of the loop impactor. The loop impactor has a collecting cylinder in the loop impactor. An annular cavity is formed between the collecting cylinder and the loop impactor. The lower part of the annular cavity is communicated with an air pump. The side wall of the collecting cylinder is a mesh structure. The collecting assembly comprises a collector and a filter. The upper end of the collector is connected with the upper end of the loop impactor. The lower end of the collector is connected with the loop impactor seat. An water pump is arranged on the connecting pipeline between the collector and the loop impactor seat. The loop impactor, the loop impactor seat and the collector form an annular loop. The filter is arranged in the collector. The filter has filter screens with different filtering levels. The collecting, classifying and flushing of the micro plastic aerosol are integrated. The micro plastic aerosol can be collected automatically.

Description

Technical Field

[0001] This invention relates to the field of microplastic aerosol collection technology, specifically a microplastic aerosol collection device. Background Technology

[0002] Microplastics are a major source of air pollutants, and atmospheric microplastics are also known as microplastic aerosols. They are characterized by complex composition, high concentration, and significant harmful effects, making them a major component of atmospheric pollutants. Currently, microplastic aerosols are mainly collected using sampling devices with varying flow rates. However, due to the diverse morphologies and large particle sizes of microplastic aerosols, using aerosol particle sampling devices to collect atmospheric microplastics is inefficient, produces many impurities, and results in low sample quality. Furthermore, it can lead to the loss of samples with specific morphologies and larger particle sizes, causing interference and obstacles to research. Summary of the Invention

[0003] The purpose of this invention is to provide a microplastic aerosol collection device to solve the problems of excessive impurities and incomplete sample collection in existing sampling devices.

[0004] The technical solution adopted by this invention to solve its technical problem is: a microplastic aerosol collection device, including a sample inlet chamber, a sampling component, a collection component, and a base. The sampling component includes a fixedly connected annular tube and an annular seat. The sample outlet end of the sample inlet chamber is connected to the upper end of the annular tube. The annular tube contains a collection cylinder, and an annular cavity is formed between the collection cylinder and the annular tube. The lower part of the annular cavity is connected to an air pump. The side wall of the collection cylinder has a mesh structure. The collection component includes a collector and a filter. The upper end of the collector is connected to the upper end of the annular tube, and the lower end of the collector is connected to the annular seat. A water pump is provided on the connecting pipeline between the two. A one-way valve is provided in the lower end of the collector. The system functions to allow water to flow from the upper end to the lower end of the collector. The annular tube, annular seat, and collector form a ring circuit. The filter is located inside the collector and has screens with different filtration stages. The base has a water cavity that is connected to the bottom of the annular seat and the bottom of the collector. The air pump allows microplastic aerosols to enter through the injection end of the injection chamber, then enter the annular tube, penetrate the side wall of the collection tube, enter the annular cavity, and then flow out of the annular tube. The water pump causes water in the water cavity to flow into the lower end of the collection tube, then sequentially through the annular seat, the collection tube, and the upper end of the annular tube before flowing into the collection tube. The microplastic aerosol sample is intercepted by the filter screen, thus achieving collection.

[0005] Furthermore, the sample inlet of the sample inlet chamber has a protective mesh, and the sample inlet end of the sample inlet chamber has an end cap.

[0006] Furthermore, a support ring is fixed to the inner wall of the upper end of the annular tube, and the upper end of the collection tube has an annular folded edge that contacts the top surface of the support ring. A sealing ring is provided on the inner wall of the lower end of the annular tube, and the bottom surface of the collection tube contacts the end face of the sealing ring. A positioning ring is provided inside the upper end of the annular tube to limit the position of the collection tube from above. The annular cavity is formed by the support ring, the annular tube, the collection tube, and the sealing ring.

[0007] Furthermore, the filter includes a plurality of filter cylinders arranged in sequence, with each pair of adjacent filter cylinders in contact, and each filter cylinder contains a filter screen, the mesh size of which gradually increases from top to bottom.

[0008] Furthermore, in each pair of adjacent filter cartridges, the first filter cartridge has a magnet and the second filter cartridge has an iron sheet, and the contact between the two adjacent filter cartridges is achieved by the attraction of the magnet and the iron sheet.

[0009] Furthermore, each pair of adjacent filter cartridges is threaded together.

[0010] Furthermore, the ring punch seat has an opening and closing mechanism, which includes an upper sealing plate, a lower sealing plate, and a rotating shaft. The lower sealing plate is fixed inside the ring punch seat, and the top surface of the upper sealing plate contacts the lower sealing plate. The upper end of the rotating shaft passes through the lower sealing plate and is fixedly connected to the upper sealing plate. The lower end of the rotating shaft extends into the base, and the base has a motor that drives the rotating shaft to rotate. Both the upper and lower sealing plates have through holes. After the through holes on the upper and lower sealing plates are connected, the cavities above and below the lower sealing plate inside the ring punch seat are connected.

[0011] Furthermore, the collector includes a collection pipe, a collection pipe cap, and a collection pipe seat. The collection pipe cap is threaded to the upper end of the collection pipe, and the collection pipe seat is threaded to the lower end of the collection pipe. The filter is located inside the collection pipe. The collection pipe cap has a cap interface that connects to the upper end of the annular pipe, and the collection pipe seat has a seat-side interface that connects to the water pump.

[0012] Furthermore, the top of the collection tube cap has a drying fan, which dries the sample inside the filter by blowing air into the collector.

[0013] Furthermore, the upper surface of the base has a photovoltaic panel, which powers the air pump, water pump, and motor.

[0014] The beneficial effects of this invention are as follows: This invention introduces aerosols through the sample introduction chamber, adsorbs aerosols through the collection tube, and circulates water through a ring-shaped loop. As the water flows through the collection tube, it washes the aerosols down from the inner wall of the tube. The aerosols then flow with the water into the collector, where they are intercepted by the filter screen in the filter tube, thus achieving the acquisition of microplastic aerosol samples. Some impurities in the microplastic aerosol samples can pass through the side wall of the collection tube and flow out of the ring-flushing tube, thereby reducing the impurity content in the microplastic aerosol samples. Furthermore, impurities in the microplastic aerosol samples can be further intercepted by the filter screen on the filter tube, further reducing the impurity content in the microplastic aerosol samples. By setting up filters with different filtration levels, fine classification and screening of microplastic aerosol samples can be achieved. This invention is applicable to the collection of microplastic aerosol samples in the atmosphere. It features high sampling efficiency, complete microplastic components, clean samples with few impurities, and fine classification and screening. The collected microplastic aerosol samples are of high quality and can effectively meet the quality requirements of experiments for microplastic aerosol samples. It is suitable for various precision instrument analyses in atmospheric microplastic research. Attached Figure Description

[0015] Figure 1 This is a three-dimensional diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 A 3D view of the sampling chamber; Figure 4 This is a cross-sectional view of a perforated tube; Figure 5 A 3D view of the collection tube; Figure 6 This is a diagram showing the airflow path inside the annular pipe. Figure 7 This is a diagram showing the flow path of water within the annular pipe. Figure 8 This is a cross-sectional view of the filter tube and the filter. Figure 9 This is a cross-sectional view of the filter tube; Figure 10 This is the front view of Filter Embodiment 1; Figure 11 This is a cross-sectional assembly view of two adjacent filter cartridges in Filter Embodiment 2; Figure 12 for Figure 11 Enlarged view of a portion of point A in the middle; Figure 13 This is a cross-sectional assembly view of two adjacent filter cartridges in Filter Embodiment 3; Figure 14 The main view for setting up the drying fan on the collection component; Figure 15 A 3D view of the base; Figure 16 This is a diagram showing the microplastic aerosol collection path of the present invention; In the diagram: 1. Sample inlet chamber; 11. Protective mesh; 12. End cap; 13. Sample inlet chamber interface; 2. Ring punch; 20. Sealing ring; 21. Air pump interface; 22. Transfer interface; 23. Air pump; 24. Lifting ring; 25. Collection tube; 251. Folded edge; 26. Positioning ring; 261. Through hole; 27. Annular cavity; 28. Ring punch seat; 281. Ring punch seat side interface; 282. Lower sealing plate; 283. Upper sealing plate; 284. Rotating shaft; 285. Ring punch seat lower interface; 29. ​​Boss; 3. Receiving tube. Collector, 31 Collection pipe, 32 Collection pipe cap, 321 Cap interface, 33 Collection pipe seat, 331 Side interface of seat, 332 Lower interface of seat, 333 Air outlet interface, 34 Water pump, 35 One-way valve, 4 Filter, 41 Filter cartridge, 42 Filter screen, 43 Magnet, 44 Iron sheet, 45 Support ring, 5 Base, 51 Support foot, 52 Water inlet, 53 Drain outlet, 54 Water outlet interface, 55 Water inlet interface, 56 Photovoltaic panel, 6 Drying fan. Detailed Implementation

[0016] like Figures 1 to 16 As shown in the figure, the present invention includes a sample inlet chamber 1, a sampling component, a collection component, and a base 5. The structure, working principle, and usage of the invention are described below with reference to the accompanying drawings.

[0017] like Figures 1 to 16 As shown, the microplastic aerosol collection device of the present invention includes a sample inlet chamber 1, a sampling component, a collection component, and a base 6, as follows: Figure 3 As shown, the overall shape of the sample inlet chamber 1 is L-shaped. The first end of the sample inlet chamber 1 is the sample inlet end, and the second end is the sample outlet end. The sample inlet end of the sample inlet chamber 1 has a protective mesh 11, and the end cap 12 is located at the end of the sample inlet end. The protective mesh 11 prevents small animals and insects from entering the sample inlet chamber 1, and the end cap 12 serves to protect against rain. In use, the end cap 12 is folded down to form a suitable angle with the sample inlet chamber 1. The sample outlet end of the sample inlet chamber 1 has a sample inlet interface 13, which facilitates connection to the annular tube 2.

[0018] like Figure 4 As shown, the sampling assembly includes a fixedly connected annular tube 2 and an annular seat 28. The sample outlet of the sample inlet chamber 1 is connected to the upper end of the annular tube 2. Specifically, the inner wall of the upper end of the annular tube 2 is provided with an internal thread, and the sample inlet chamber interface 13 has an external thread. The sample inlet chamber interface 13 extends into the annular tube 2 to achieve a threaded connection. The annular tube 2 is a round tube. The side wall of the lower end of the annular tube 2 has an air pump interface 21, and the side wall of the upper end of the annular tube 2 has a transfer interface 22. An air pump 23 is installed on the air pump interface 21. The annular tube 2 contains a collection tube 25. Specifically, a lifting ring 24 is fixed to the inner wall of the upper end of the annular tube 2. Figure 5As shown, the sidewall of the collection tube 25 has a mesh structure, and the upper end of the collection tube 25 has an annular folded edge 251. The folded edge 251 contacts the top surface of the support ring 24 to achieve the lower limit of the collection tube 25. Figure 4 As shown, the inner wall of the lower end of the annular tube 2 has a sealing ring 20, and the bottom surface of the collection tube 25 contacts the end face of the sealing ring 20. The sealing ring 20 is a rubber part, and the upper end of the annular tube 2 has a positioning ring 26 that limits the collection tube 25 from above. During installation, the collection tube 25 is first placed inside the annular tube 2, at which time the lifting ring 24 contacts the folded edge of the collection tube 25. Then, the positioning ring 26 is placed inside the annular tube 2, at which time the bottom surface of the positioning ring 26 contacts the folded edge. Then, the annular tube 2 is connected to the sample inlet chamber 1. At this time, the positioning ring 26 and the sealing ring 20 clamp the collection tube 25 in the middle. To achieve the assembly of the sealing ring 20, an annular boss 29 is provided on the inner wall of the lower end of the annular tube 2, and an annular groove is provided on the inner side wall of the sealing ring 20. When the boss 29 extends into the annular groove of the sealing ring 20, the sealing ring 20 is fitted onto the boss 29.

[0019] like Figure 4 As shown, the positioning ring 26 has a through hole 261 that communicates with the transfer interface 22. An annular cavity 27 is formed between the collection tube 25 and the annular tube 2. The upper boundary of the annular cavity 27 is the support ring 24, and the lower boundary of the annular cavity 27 is the sealing ring 20. The lower part of the annular cavity 27 is connected to the air pump 23 through the air pump interface 21. The ring punch seat 28 is a conical structure with a larger upper end and a smaller lower end. The side wall of the ring punch seat 28 has a ring punch seat side interface 281. The ring punch seat 28 has an opening and closing mechanism, which includes an upper sealing plate 283, a lower sealing plate 282 and a rotating shaft 284. The small end of the ring punch seat 28 has a ring punch seat lower interface 285. The lower sealing plate 283 is fixed inside the ring punch seat 28. The upper sealing plate 283 contacts the top surface of the lower sealing plate 282. The upper end of the rotating shaft 284 passes through the lower sealing plate 282 and is fixedly connected to the upper sealing plate 283. The lower end of the rotating shaft 284 extends into the base 5. The base 5 has a motor that drives the rotating shaft 284 to rotate. Both the upper sealing plate 283 and the lower sealing plate 282 have through holes. When the motor drives the rotating shaft 284 to rotate the upper sealing plate 283, the through holes on the upper sealing plate 283 and the lower sealing plate 282 are connected, and the cavities above and below the lower sealing plate 283 in the ring punch seat 28 are connected. At this time, the lower interface 285 of the ring punch seat is connected to the ring punch tube 2, and the lower interface 285 of the ring punch seat is connected to the side interface 281 of the ring punch seat. When the through holes on the upper sealing plate 283 and the lower sealing plate 282 are misaligned, the cavities above and below the lower sealing plate 283 in the ring punch seat 28 are separated. At this time, the lower interface 285 of the ring punch seat is no longer connected to the ring punch tube 2, and the lower interface 285 of the ring punch seat is no longer connected to the side interface 281 of the ring punch seat.

[0020] like Figure 6As shown, after entering through the upper end of the annular pipe 2, the air directly enters the collection cylinder 25, penetrates the side wall of the collection cylinder 25, enters the annular cavity 27, and finally flows out through the air pump interface 21. Figure 7 As shown, water flows into the annular flushing seat 28 through the side interface 281. After the opening and closing mechanism separates the cavities above and below the lower sealing plate 282, the water entering the annular flushing seat 28 gradually surges into the annular flushing pipe 2. The aerosol located on the inner wall of the collection tube 25 enters the water and flows out of the annular flushing pipe 2 through the transfer interface 22.

[0021] like Figure 8 As shown, the collection assembly includes a collector 3 and a filter 4. The upper end of the collector 3 is connected to the upper end of the annular pipe 2, as shown. Figure 1 As shown, the lower end of collector 3 is connected to ring-shaped seat 28, and a water pump 34 is located on the connecting pipe between the two. Figure 8 , Figure 9 As shown, the collector 3 includes a collection tube 31, a collection tube cap 32, and a collection tube seat 33. The collection tube 31 is a circular straight tube. One end of the collection tube cap 32 is open, and the other end is closed. The collection tube cap 32 is threadedly connected to the upper end of the collection tube 31, thereby sealing the collection tube 31 from above. The side wall of the collection tube cap 32 has a cap interface 321. Figure 2 As shown, the cap interface 321 is threadedly connected to the transfer interface 22, thereby connecting the upper end of the annular pipe 2 to the collecting cap 32 through the cap interface 321 and the transfer interface 22. The collecting pipe seat 33 is threadedly connected to the lower end of the collecting pipe 31. The collecting pipe seat 33 is a tapered structure with a larger upper end and a smaller lower end. The side wall of the collecting pipe seat 33 has a pipe seat side interface 331, which is connected to the annular pipe seat side interface 281 through a pipeline. A water pump 34 is installed on the connecting pipeline between the pipe seat side interface 331 and the annular pipe seat side interface 281, driving the water flow. The smaller end of the collecting pipe seat 33 is the lower pipe seat interface 332. Figure 8 , Figure 9 As shown, the lower end of collector 3, i.e., inside the collection pipe seat 33, has a one-way valve 35. The one-way valve 35 causes water to flow from the upper end of collector 3 to the lower end of collector 3.

[0022] like Figure 8 As shown, filter 4 is located inside collection pipe 31, as... Figure 10 As shown, the filter 4 includes a plurality of filter cartridges 41 arranged sequentially, such as Figure 8 As shown, each filter cartridge 41 has a filter screen 42, and the filter screens 42 in different filter cartridges 41 have different mesh sizes, so that the filter 4 has filter screens 42 with different filtration levels. Each pair of adjacent filter cartridges 41 are in contact; in Embodiment 1, the filter cartridges 41 are directly stacked inside the collection tube 31. In Embodiment 2, the filter cartridges 41 are magnetically attached together to form the filter 4. Specifically, as... Figure 11 , Figure 12 As shown, in each pair of adjacent filter cylinders 41, a magnet 43 is embedded at the bottom of the upper filter cylinder 41, and an iron sheet 44 is embedded at the top of the lower filter cylinder 41. After the upper and lower filter cylinders 41 come into contact, the adjacent filter cylinders 41 are connected by the attraction of the magnet 43 and the iron sheet 44. Figure 13 The image shows an embodiment of the assembly method between two adjacent filter cylinders 41, where each pair of adjacent filter cylinders 41 is threaded together. In this case, a support ring 45 is fixed on the inner wall of the lower part of the filter cylinder 41, and the filter screen 42 is placed on the support ring 45. The inner wall of the filter cylinder 41 below the support ring 45 has internal threads, and the upper part of the filter cylinder 41 has external threads, so as to facilitate the threaded connection between two adjacent filter cylinders 41.

[0023] like Figure 1 , Figure 2 As shown, the annular pipe 2, annular seat 28, water pump 34, and collector 3 form an annular loop. The base 5 has a water cavity, which is connected to the bottom of the annular seat 28 and the bottom of the collector 3. Specifically, the base 5 is a cylindrical structure with supporting feet 51 at the bottom and a water inlet 52, an outlet 54, and an inlet 55 at the top. The water inlet 52 is used to add water to the water cavity, the inlet 55 is used to connect to the lower interface 332 on the collecting pipe seat 33, and the outlet 54 is used to connect to the lower interface 285 on the annular seat 28. Figure 15 As shown, a drain outlet 53 is also provided at the bottom of the base 5 to drain the water in the water chamber.

[0024] To dry the sample on filter 4, such as Figure 14 As shown, the top of the collection tube cap 32 has a drying fan 6, which dries the sample in the filter 4 by blowing air into the collector 3.

[0025] like Figure 15 As shown, the upper surface of the base 5 has a photovoltaic panel 56, which powers the air pump 23, water pump 34 and motor.

[0026] The working principle of the present invention is described below: (1) When the air pump 23 is working, a negative pressure is generated at the air pump interface 21, such as Figure 6 , Figure 16 As shown, the microplastic aerosol enters through the injection end of the injection chamber 1, and then enters the annular tube 2. Air passes through the side wall of the collection tube 25 and enters the annular cavity 27 before flowing out of the annular tube 2. The microplastic aerosol is adsorbed on the side wall of the collection tube 25. (2) After starting the water pump 34, as Figure 7 , Figure 16As shown, water in the water chamber flows into the collection tube seat 33, and then flows sequentially through the ring flush seat 28, the collection tube 25, and the upper end of the ring flush tube 2 before flowing into the collection tube cap 32. The microplastic aerosol sample on the inner wall of the collection tube 25 is mixed in the water and flows into the filter 4 with the water flow, where it is intercepted by the filter screen 42 to achieve collection. (3) Start the drying fan 6. The drying fan 6 blows low-temperature air into the collector 3 to dry the microplastic aerosol sample in the filter 4. (4) Place the base 5 in the sampling area, assemble the collector 3, the ring flush seat 28 and the base 5, and assemble the sample inlet chamber 1 and the ring flush tube 2. (5) After collection is completed, retrieve the collection device of the present invention, remove the filter 4 from the collector 3, and obtain the microplastic aerosol sample.

[0027] The following describes the method of using this invention: S1. Assemble the sample inlet chamber 1 with the ring-flush tube 2, assemble the ring-flush tube 2 with the ring-flush seat 28, assemble the ring-flush seat 28 with the base 5, assemble the collection tube cap 32, the collection tube 31, and the collection tube seat 33, assemble the ring-flush tube 2 with the collection tube cap 32, assemble the collection tube seat 33 with the base 5, and assemble the water pump 34 with the ring-flush seat 28 and the collection tube seat 33. S2. Open the end cap 12 and place the base 5 in the sampling area. S3. Start the air pump 23 to force air from the sampling environment into the sample inlet chamber 1. S4. After a period of time, start the water pump 34 to allow water to flow in the annular loop. S5. After a period of time, remove the filter 4 to obtain the microplastic aerosol sample.

[0028] This invention introduces aerosols, such as those carried by pollen, through a sample introduction chamber. The collection tube adsorbs these aerosols, and a circular loop ensures water circulation. As the water flows through the collection tube, it washes the aerosols down from the inner wall of the tube. The aerosols then flow with the water into a collector where they are intercepted by a filter in the filter cartridge, thus obtaining a microplastic aerosol sample. Some impurities in the microplastic aerosol sample can pass through the side wall of the collection tube and flow out through the circular flushing tube, reducing the impurity content in the sample. Furthermore, impurities in the microplastic aerosol sample can be further intercepted by the filter in the filter cartridge, further reducing the impurity content. By using filters with different filtration levels, precise classification and screening of the microplastic aerosol sample can be achieved. This invention is applicable to the collection of microplastic aerosol samples in the atmosphere. It features high sampling efficiency, complete microplastic components, clean samples with few impurities, and fine classification and screening. The collected microplastic aerosol samples are of high quality and can effectively meet the quality requirements of experiments for microplastic aerosol samples. It is suitable for various precision instrument analyses in atmospheric microplastic research.

Claims

1. A microplastic aerosol collection device, characterized in that, The system includes an injection chamber, a sampling assembly, a collection assembly, and a base. The sampling assembly includes a fixedly connected annular tube and an annular base. The sample outlet of the injection chamber is connected to the upper end of the annular tube. The annular tube contains a collection tube, forming an annular cavity with the collection tube. The lower part of the annular cavity is connected to an air pump. The sidewall of the collection tube has a mesh structure. The collection assembly includes a collector and a filter. The upper end of the collector is connected to the upper end of the annular tube, and the lower end of the collector is connected to the annular base. A water pump is located on the connecting pipe between the two. A one-way valve is located in the lower end of the collector, which causes water to flow from the upper end of the collector to the base. At the lower end of the collector, the annular tube, the annular seat, and the collector form an annular loop. The filter is located inside the collector and has filter screens with different filtration stages. The base has a water chamber, which is connected to the bottom of the annular seat and the bottom of the collector. The air pump causes the microplastic aerosol to enter through the injection end of the injection chamber, then enter the annular tube, penetrate the side wall of the collection tube, enter the annular cavity, and then flow out of the annular tube. The water pump causes the water in the water chamber to flow into the lower end of the collection tube, then flow through the annular seat, the collection tube, and the upper end of the annular tube in sequence before flowing into the collection tube. The microplastic aerosol sample is intercepted by the filter screen to achieve collection.

2. The microplastic aerosol collection device according to claim 1, characterized in that, The sample inlet of the sample inlet chamber has a protective mesh inside, and the sample inlet end of the sample inlet chamber has an end cap.

3. The microplastic aerosol collection device according to claim 1, characterized in that, A lifting ring is fixed to the inner wall of the upper end of the annular tube. The upper end of the collection tube has an annular folded edge that contacts the top surface of the lifting ring. A sealing ring is provided on the inner wall of the lower end of the annular tube. The bottom surface of the collection tube contacts the end face of the sealing ring. A positioning ring is provided inside the upper end of the annular tube to limit the position of the collection tube from above. The annular cavity is formed by the lifting ring, the annular tube, the collection tube, and the sealing ring.

4. The microplastic aerosol collection device according to claim 1, characterized in that, The filter includes several filter cylinders arranged in sequence, with each pair of adjacent filter cylinders in contact. Each filter cylinder contains a filter screen, and the mesh size of the filter screen gradually increases from top to bottom.

5. The microplastic aerosol collection device according to claim 4, characterized in that, In each pair of adjacent filter cartridges, the first filter cartridge has a magnet and the second filter cartridge has an iron sheet. The contact between the two adjacent filter cartridges is achieved by the attraction between the magnet and the iron sheet.

6. The microplastic aerosol collection device according to claim 4, characterized in that, Each pair of adjacent filter cartridges is threaded together.

7. The microplastic aerosol collection device according to claim 1, characterized in that, The ring punch seat has an opening and closing mechanism, which includes an upper sealing plate, a lower sealing plate, and a rotating shaft. The lower sealing plate is fixed inside the ring punch seat, and the top surface of the upper sealing plate contacts the lower sealing plate. The upper end of the rotating shaft passes through the lower sealing plate and is fixedly connected to the upper sealing plate. The lower end of the rotating shaft extends into the base, and the base has a motor that drives the rotating shaft to rotate. Both the upper and lower sealing plates have through holes. After the through holes on the upper and lower sealing plates are connected, the cavities above and below the lower sealing plate inside the ring punch seat are connected.

8. The microplastic aerosol collection device according to claim 1, characterized in that, The collector includes a collection pipe, a collection pipe cap, and a collection pipe seat. The collection pipe cap is threaded to the upper end of the collection pipe, and the collection pipe seat is threaded to the lower end of the collection pipe. The filter is located inside the collection pipe. The collection pipe cap has a cap interface that connects to the upper end of the ring-flush pipe, and the collection pipe seat has a seat-side interface that connects to the water pump.

9. The microplastic aerosol collection device according to claim 8, characterized in that, The top of the collection tube cap has a drying fan, which dries the microplastic aerosol sample inside the filter by blowing air into the collector.

10. The microplastic aerosol collection device according to claim 9, characterized in that, The upper surface of the base has a photovoltaic panel, which powers the air pump, water pump and motor.

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