An aerosol filtration device

Abstract

This invention provides an aerosol filtration device, comprising: a dissolving cup with an internal cavity, one end of which has an air inlet communicating with the cavity; an air guide tube disposed within the dissolving cup, having a flow channel communicating with the air inlet, and also having a separate air guide channel on the air guide tube, with one end of the air guide channel near the air inlet communicating with the cavity, and the other end of the air guide channel away from the air inlet communicating with the flow channel; and a suction nozzle having an air outlet, movably disposed at the other end of the dissolving cup, with an air outlet communicating with the air outlet on the dissolving cup, and a sealing part protruding from the suction nozzle and inserting into the flow channel. When the suction nozzle and the dissolving cup rotate relative to each other or move axially, the suction nozzle closes or opens the air outlet, and the sealing part closes or opens the flow channel. This invention, through the cooperation of the air guide tube and the sealing part, solves the problems of poor taste, high temperature, and easy leakage of the filtered liquid from the outlet in existing aerosol filtration methods.

Description

Technical Field

[0001] This invention relates to the field of aerosol filtration technology, and more specifically to an aerosol filtration device. Background Technology

[0002] Aerosol generating devices can heat aerosol substrates and atomize them to produce aerosols. However, the aerosols produced by these devices contain small amounts of harmful substances. These harmful substances can enter the human body along with the aerosols and have adverse effects on human health.

[0003] To reduce the content of harmful substances in aerosols, existing aerosol generators can be equipped with a filtration structure for filtering aerosols, such as filtering aerosols through liquids or filter cartridges. The filtered aerosols effectively prevent harmful substances from entering the human body.

[0004] Currently, the main methods for filtering aerosols are using filter cotton or filtrate. Using filter cotton alone results in a dry taste and does not cool the aerosol. When using liquid for filtration, the liquid is prone to leaking out from the final aerosol outlet, causing the filtered liquid to enter the human mouth and seriously affecting the user experience. Summary of the Invention

[0005] In view of the above-mentioned defects in the existing technology, the present invention provides an aerosol filtration device, which aims to solve the problems of poor taste, high temperature and easy leakage of liquid used for filtration from the outlet in the prior art.

[0006] In a first aspect, to solve the above-mentioned technical problems, the present invention provides an aerosol filtration device, comprising:

[0007] A melting cup has an internal cavity for holding a filter substrate, and one end of the melting cup has an air inlet that communicates with the cavity;

[0008] A gas guide tube is disposed inside the melting cup. The gas guide tube has a flow channel communicating with the air inlet. The gas guide tube also has a gas guide channel surrounding the flow channel. The end of the gas guide channel near the air inlet is connected to the cavity, and the end of the gas guide channel away from the air inlet is connected to the flow channel.

[0009] The suction nozzle has an air outlet. The suction nozzle is movably disposed in the melting cup at one end away from the air inlet. The end of the melting cup away from the air inlet has an air outlet that communicates with the air outlet. The suction nozzle has a protruding sealing part that is inserted into the flow channel and / or the air guide channel. After the suction nozzle and the melting cup rotate relative to each other and / or move axially, the suction nozzle closes or opens the air outlet, and the sealing part closes or opens the flow channel and / or the air guide channel.

[0010] Furthermore, the air guide tube includes an inner tube and an outer tube sleeved outside the inner tube, the flow channel is provided in the inner tube, and the air guide channel is formed between the inner tube and the outer tube.

[0011] Furthermore, one end of the inner tube is fitted into the air inlet, the end of the outer tube away from the air inlet is fixed to the melting cup, and the end of the outer tube near the air inlet is an opening communicating with the cavity.

[0012] Furthermore, the inner tube has a through hole on the end wall away from the air inlet for connecting the flow channel and the air guide channel. The sealing part is inserted into the position of the through hole and seals it. After the suction nozzle moves axially away from the melting cup in a direction away from the air inlet, the sealing part disengages from the position of the through hole and opens the through hole.

[0013] Furthermore, the end of the inner tube away from the air inlet is provided with a first sealing element for sealing, so as to seal the inlet and the through hole of the inner tube. The first sealing element has a guide hole through the middle for the sealing part to be inserted, and the wall surface of the first sealing element has a through hole at the position corresponding to the through hole.

[0014] Furthermore, the inner tube has a through hole on the end wall away from the air inlet for connecting the flow channel and the air guide channel. The sealing part is inserted into the position of the through hole and seals it. After the suction nozzle moves axially away from the melting cup in a direction away from the air inlet, the sealing part disengages from the position of the through hole and opens the through hole.

[0015] Furthermore, a gap is provided between the end of the inner tube away from the air inlet and the wall of the cavity, so that the flow channel communicates with the air guide channel through the gap.

[0016] Furthermore, a limiting structure is provided between the melting cup and the nozzle to restrict the movement of the nozzle away from the air inlet, and an elastic element is provided between the melting cup and the nozzle to apply an outward thrust to the nozzle when the limiting structure is released.

[0017] Furthermore, the melting cup has a base for sealing at one end away from the air inlet and an upper cover fitted on the base. A cavity is formed between the base and the upper cover. One end of the suction nozzle has a turntable that is rotatably disposed in the cavity. The sealing part protrudes from the middle of the turntable. The elastic element is disposed between the turntable and the base. The air outlet is disposed through the base. The limiting structure is between the turntable and the upper cover.

[0018] Furthermore, the limiting structure includes at least one groove recessed on the inner surface of the upper cover and protrusions on the turntable that correspond to and engage with the grooves. After the nozzle and the upper cover rotate relative to each other, the protrusions and the grooves are vertically aligned and vertically misaligned. When vertically aligned, the elastic element pops the nozzle outward to open the air outlet and flow channel. When vertically misaligned, it pushes the turntable inward to close the air outlet and flow channel.

[0019] Furthermore, the base has a circumferentially arranged limiting groove at one end away from the melting cup, and a limiting buckle is provided on the outer periphery of the turntable and placed in the limiting groove to restrict the turntable from rotating within the range of the limiting groove.

[0020] Furthermore, the turntable has a second sealing element on the side near the base for sealing the air outlet, and the side of the base that contacts the second sealing element has a trapezoidal groove that is smaller on the inside and larger on the outside. The air outlet is located at the bottom of the trapezoidal groove, and the inner and outer circumferences of the second sealing element have chamfered bevels that seal against the trapezoidal groove.

[0021] The present invention has the following beneficial effects:

[0022] The aerosol filtering device of the present invention can be equipped with a filter substrate for filtering aerosols in the cavity. Taking a liquid substrate as an example, both the air outlet and the flow channel are opened during use. The aerosol enters the cavity after passing through the air inlet, the flow channel, and the air guide channel in sequence. After being filtered by the liquid substrate in the cavity, it flows out from the air outlet and the air port. Because the aerosol is filtered by the liquid substrate, the aerosol tastes more moist and the temperature of the aerosol is effectively reduced, preventing the aerosol from being too hot and affecting the taste, thus improving the user experience. When not in use, the air outlet and the flow channel are sealed by the nozzle and the sealing part on the nozzle, respectively, to prevent the liquid substrate in the cavity from overflowing from the air outlet and the flow channel. Thus, this double-sealing structure expands the filter materials that can be used in the cavity. The form of the filter material is not limited to a solid form, but can also be liquid.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an exploded view of the aerosol filtration device in the embodiment;

[0026] Figure 2 This is a schematic diagram of the aerosol filter device in the embodiment when the rotating nozzle is in a closed state.

[0027] Figure 3 for Figure 2 A cross-sectional view of the aerosol filtration device shown in the diagram when it is in a closed state.

[0028] Figure 4 for Figure 3 Enlarged diagram of A in the middle;

[0029] Figure 5 This is a schematic diagram of the upper cover in the embodiment;

[0030] Figure 6 This is a schematic diagram of the base in the embodiment;

[0031] Figure 7 This is a schematic diagram of the suction nozzle in the embodiment;

[0032] Figure 8 This is a schematic diagram showing another view of the suction nozzle in the embodiment;

[0033] Figure 9 This is a schematic diagram of the aerosol filter device in the embodiment when the rotating nozzle is in the open state.

[0034] Figure 10 for Figure 9 The aerosol filter shown is a cross-sectional view at the air outlet.

[0035] Figure 11 for Figure 9 The aerosol filtration device shown is located at the protrusion;

[0036] Figure 12 for Figure 10 Enlarged diagram of B in the middle;

[0037] Figure 13 for Figure 11 Enlarged diagram of C in the middle;

[0038] Figure 14 This is a schematic diagram of the airflow in the aerosol filtration device in the embodiment. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0041] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0042] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0043] Example

[0044] like Figures 1-14 As shown in the figure, an aerosol filtration device in this embodiment includes a dissolving cup 1, an air guide tube 2, and a suction nozzle 3. Inside the dissolving cup 1 is a cavity 10 for accommodating a filter substrate. The filter substrate may include a liquid or solid matrix for filtering harmful substances on the aerosol. One end of the dissolving cup 1 has a through-hole 11 communicating with the cavity 10. This through-hole can be located in the middle of the dissolving cup (e.g., ...). Figure 3 (As shown), it can also be set at an off-center position, such as near the wall of the melting cup, for external aerosols to enter the filtration device; the air guide tube 2 is located inside the melting cup 1, with its upper and lower ends connected to the upper and lower end faces of the cavity, thereby separating the air guide tube from the cavity. This air guide tube can be set vertically inside the melting cup (e.g. Figure 3 (As shown), it can also be tilted, bent, or coiled inside the melting cup, as long as there is a height difference between its two ends; the gas guide tube 2 is provided with a flow channel 20 communicating with the air inlet 11, and the gas guide tube 2 is also provided with a gas guide channel 21 that is separated from the flow channel 20. This gas guide channel can be arranged around the flow channel (such as...). Figure 3(As shown), it can also be set on one side of the flow channel, with the end of the air guide channel 21 away from the air inlet 11 connected to the flow channel 20, and the end of the air guide channel 21 near the air inlet 11 connected to the cavity 10. The connection point with the cavity can be an opening at the end or an opening on the side wall, as long as there is a height difference between the opening and the connection point between the air guide channel and the air inlet. In this way, the aerosol entering from the air inlet is first conducted upward to the far end of the air guide tube and then enters the air guide channel, and then is transported along the air guide channel towards the air inlet before entering the cavity (e.g. Figure 14 As shown), when the cavity 10 contains a liquid matrix, the top surface of the liquid matrix can be lower than the connection between the gas guide channel and the flow channel to prevent the liquid matrix from overflowing from the flow channel during use. Furthermore, the structure of the gas guide channel connecting to both the flow channel and the cavity at both ends ensures that the aerosol enters the cavity after passing through the gas guide channel. The nozzle 3 has a through-hole 30 in the middle, and is movably positioned in the melting cup 1 at the end away from the air inlet 11. The melting cup 1 at the end away from the air inlet 11 has a through-hole 12 that connects to the air outlet 10 and the cavity 10, allowing the filtered aerosol to flow out sequentially from the air outlet and the air port. The nozzle 3 has a protruding sealing part 31 that inserts into the flow channel 20 and / or the gas guide channel, meaning the sealing part can close the cavity. One of them can also close both at the same time, and after the suction nozzle 3 and the dissolving cup 1 rotate relative to each other and / or move axially, the suction nozzle 3 closes or opens the air outlet 12, and the sealing part 31 closes or opens the flow channel 20 and / or the air guiding channel. Of course, the closing or opening state of the air outlet and the flow channel is always synchronized, that is, they are closed or opened at the same time, so as to achieve normal flow of aerosol when in use and cavity closure when not in use. In the above, according to actual needs, the filter material in the cavity can be a liquid matrix such as water, ethanol, ether, or a solid matrix such as filter cotton. When using filter cotton, liquid can also be absorbed in the filter cotton to moisten the aerosol during filtration, and the method of absorbing liquid by the filter cotton can further avoid liquid leakage.

[0045] Preferably, the air guide tube 2 includes an inner tube 22 and an outer tube 23 sleeved outside the inner tube 22. The flow channel 20 is provided through the middle of the inner tube 22, and an air guide channel 21 is formed between the inner tube 22 and the outer tube 23. The air guide tube is composed of the inner and outer tubes, which simplifies the structure and facilitates processing and installation.

[0046] Preferably, one end of the inner tube 22 is fitted into the air inlet 11 to connect the two, and the other end extends towards the nozzle. The end of the outer tube 23 away from the air inlet 11 is fixed to the inner wall of the melting cup 1. Thus, the inner tube 22 and the outer tube 23 form a nested structure after assembly by fixing the upper and lower ends, and a guide channel is formed between them. That is, the inner diameter of the outer tube 23 is larger than the outer diameter of the inner tube 22, and the end of the outer tube 23 near the air inlet 11 is an opening that communicates with the cavity 10. That is, the end of the outer tube 23 near the air inlet is a movable end that does not abut against the inner wall of the cavity, so as to form a natural opening and reduce the need to drill holes in the outer tube.

[0047] Preferably, in order to achieve the connection between the air guiding channel and the flow channel, a through hole 24 for connecting the flow channel 20 and the air guiding channel 21 is provided through the end wall of the inner tube 22 away from the air inlet 11. There can be multiple through holes 24, which are arranged in a ring array along the circumference of the inner tube, so that the through holes and the openings in the air guiding channel that communicate with the cavity are located at two ends. When in use, the through holes are located at a high position, thereby preventing the liquid matrix in the cavity from overflowing from the through holes and flowing out. The movable end of the sealing part 31 is inserted into the position of the through hole 24 and seals it. After the suction nozzle 3 moves axially relative to the melting cup 1 in a direction away from the air inlet 11, the air outlet is opened. After the sealing part 31 moves accordingly, its movable end is disengaged from the position of the through hole and the through hole is exposed, so as to connect the through hole and the flow channel and realize the flow of aerosol.

[0048] Preferably, when the air passage and flow passage are connected by the through hole, in order to achieve better sealing between the through hole and the sealing part, a first sealing member 4 is fixedly provided at the end of the inner tube 22 away from the air inlet 11 by a snap-fit ​​connection, so as to seal both the pipe opening of the inner tube 22 and the through hole 24. The first sealing member 4 has a guide hole 41 through the middle for the sealing part 31 to be inserted, and a through hole 42 is provided on the wall surface of the first sealing member 4 at the position corresponding to the through hole 24. When the sealing part is performing the sealing operation, it is inserted into the through hole and seals the through hole. When it is opened, it moves outward and moves out of the range of the through hole. The first sealing member is preferably made of silicone, and the elasticity of silicone is used to ensure the sealing performance between the sealing part and the first sealing member.

[0049] It is understood that in another specific embodiment, a through hole may not be used to connect the air guide channel and the flow channel. Specifically, a gap may be provided between the end of the inner tube away from the air inlet and the wall of the cavity. That is, the end of the inner tube away from the air inlet is a movable end that does not abut against the inner wall of the cavity, so that the flow channel can be connected to the air guide channel through the gap. In this case, the flow channel can be sealed by inserting the sealing part into the guide hole in the first sealing member. When it is necessary to open the connection between the flow channel and the air guide channel, the sealing part moves outward with the nozzle. At this time, the movable end of the sealing part disengages from the first sealing member, so that the guide hole is exposed, thereby realizing the connection between the flow channel and the air guide channel.

[0050] Preferably, a limiting structure is provided between the melting cup 1 and the suction nozzle 3 to restrict the movement of the suction nozzle away from the air inlet 11, and an elastic element 5 is provided between the melting cup 1 and the suction nozzle 3. When the air outlet is closed by the suction nozzle, the elastic element is in a compressed state, giving it an outward elastic force, so that when the suction nozzle 3 is released from the limiting position, it applies an outward pushing force to the suction nozzle 3, thereby achieving automatic outward ejection after contact with the limiting position. The limiting structure can be an abutment limiting structure, a button unlocking limiting structure, a locking limiting structure, etc. In addition, the elastic element can be a spring or a metal spring sheet, etc.

[0051] Preferably, the end of the melting cup 1 furthest from the air inlet 11 is provided with a base 6 for sealing and an upper cover 7 fitted on the base 6 by means of a threaded connection. The base 6 and the upper cover 7 are generally fixed by an interference fit or a snap-fit. The base is used to seal the upper opening of the cavity. Designing the upper end of the cavity as an opening facilitates the assembly and disassembly of the inner tube 22 and the outer tube. A cavity 61 is formed between the base 6 and the upper cover 7. One end of the suction nozzle 3 is provided with a turntable 32 that is rotatably disposed in the cavity 61, and the other end extends outward from the upper cover. The sealing part 31 protrudes from the middle of the turntable 32 and passes through the base and is inserted into the flow channel. The elastic element 5 is disposed between the turntable 32 and the base 6. In order to prevent the elastic element from deflecting and moving, a receiving groove 60 for accommodating the elastic element is provided on both the turntable and the base. The air outlet 12 is provided through the base 6, and a through hole 33 is provided through the turntable to connect the air outlet 12 and the air outlet 30.

[0052] Preferably, the limiting structure includes two symmetrically arranged grooves 71 on the inner surface of the upper cover 7 and two protrusions 34 on the turntable 32 that engage with the grooves 71 in a one-to-one correspondence. After the suction nozzle 3 and the upper cover 7 rotate relative to each other, the protrusions 34 are positioned in a one-to-one correspondence with the grooves 71 and are also offset vertically. When the filter device is in use, the protrusions 34 are aligned vertically with the grooves 71, and the protrusions can be engaged in the grooves to form the stroke distance for the suction nozzle to move outward axially. At this time, the elastic force of the elastic element is used to spring the suction nozzle outward. 3. This allows the turntable and base to separate, opening the vent 12 and flow channel 20. When the protrusion 34 is misaligned with the groove 71, the protrusion is disengaged from the groove and subjected to the squeezing force of the top cover, causing the turntable to approach and press against the base, thus pressing the turntable inward and sealing the vent 12 and flow channel 20. Of course, to facilitate the protrusion sliding into or out of the groove during rotation, both the protrusion and the groove are designed as semi-circular arcs. The elasticity of the elastic element is utilized so that it can be compressed during the process of the protrusion sliding out of the groove.

[0053] Preferably, to facilitate the alignment of the protrusions and grooves, a circumferentially oriented limiting groove 62 is provided at the end of the base 6 furthest from the melting cup 1. A limiting buckle 35 protrudes from the outer periphery of the turntable 32 and is placed within the limiting groove 62 to restrict the rotation of the turntable 32 within the range of the limiting groove 62. In actual use, when the limiting buckle on the turntable rotates to one end of the limiting groove (e.g., ... Figures 2-4 As shown), the protrusions and grooves are offset vertically, and when the limiting buckle on the turntable rotates to the other end of the limiting groove (as shown), Figure 9 and Figure 13 As shown in the figure, the protrusions and grooves are set up to correspond exactly vertically, which simplifies the alignment operation.

[0054] Preferably, in order to ensure the airtightness of the turntable to the air outlet on the base, a second sealing element 8 for sealing the air outlet 12 is provided on the side of the turntable 32 near the base 6, and a trapezoidal groove 63 with a smaller inner diameter and a larger outer diameter is provided on the side of the base 6 that contacts the second sealing element 8. The air outlet 12 is located at the bottom of the trapezoidal groove 81. The second sealing element 8 is an annular shape that matches the trapezoidal groove, and a chamfered bevel surface 81 is provided on the inner and outer circumferences of the second sealing element 8 to seal against the wall of the trapezoidal groove. In addition, the design of the beveled surface can help to prevent the liquid matrix in the cavity from flowing back into the cavity due to accidental operation during use.

[0055] In other embodiments, both the first and second seals may be made of silicone.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention; therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An aerosol filtration device, characterized in that, include: A melting cup has an internal cavity for holding a filter substrate, and one end of the melting cup has an air inlet communicating with the cavity; A gas guide tube is disposed inside the melting cup. The gas guide tube has a flow channel communicating with the air inlet. The gas guide tube also has a gas guide channel that is separated from the flow channel. The end of the gas guide channel near the air inlet is connected to the cavity, and the end of the gas guide channel away from the air inlet is connected to the flow channel. The suction nozzle has an air outlet. The suction nozzle is movably disposed in the melting cup at one end away from the air inlet. The end of the melting cup away from the air inlet has an air outlet that communicates with the air outlet. The suction nozzle has a protruding sealing part that is inserted into the flow channel and / or the air guide channel. After the suction nozzle and the melting cup rotate relative to each other and / or move axially, the suction nozzle closes or opens the air outlet, and the sealing part closes or opens the flow channel and / or the air guide channel.

2. The aerosol filtration device according to claim 1, characterized in that, The air guide tube includes an inner tube and an outer tube sleeved outside the inner tube. The flow channel is located in the inner tube, and the air guide channel is formed between the inner tube and the outer tube.

3. The aerosol filtration device according to claim 2, characterized in that, One end of the inner tube is fitted into the air inlet, and the end of the outer tube away from the air inlet is fixed to the melting cup. The end of the outer tube near the air inlet is an opening that communicates with the cavity.

4. The aerosol filtration device according to claim 3, characterized in that, The inner tube has a through hole on the end wall away from the air inlet for connecting the flow channel and the air guide channel. The sealing part is inserted into the position of the through hole and closes it. After the suction nozzle moves axially away from the melting cup in a direction away from the air inlet, the sealing part disengages from the position of the through hole and opens the through hole.

5. The aerosol filtration device according to claim 4, characterized in that, The inner tube is provided with a first sealing element at the end furthest from the air inlet to seal the opening of the inner tube and the through hole. The first sealing element has a guide hole through the middle for the sealing part to be inserted, and a through hole is provided on the wall surface of the first sealing element at the position corresponding to the through hole.

6. The aerosol filtration device according to claim 3, characterized in that, A gap is provided between the end of the inner tube away from the air inlet and the wall of the cavity, so that the flow channel can communicate with the air guide channel through the gap.

7. The aerosol filtration device according to any one of claims 1-6, characterized in that, A limiting structure is provided between the melting cup and the nozzle to restrict the movement of the nozzle away from the air inlet, and an elastic element is provided between the melting cup and the nozzle to apply an outward thrust to the nozzle when the limiting structure is released.

8. The aerosol filtration device according to claim 7, characterized in that, The melting cup has a base for sealing at one end away from the air inlet and an upper cover fitted on the base. A cavity is formed between the base and the upper cover. One end of the suction nozzle has a turntable that is rotatably disposed in the cavity. The sealing part protrudes from the middle of the turntable. The elastic element is disposed between the turntable and the base. The air outlet is disposed through the base, and the limiting structure is between the turntable and the upper cover.

9. The aerosol filtration device according to claim 8, characterized in that, The limiting structure includes at least one groove recessed on the inner surface of the upper cover and protrusions on the turntable that correspond to and engage with the grooves. After the nozzle and the upper cover rotate relative to each other, the protrusions and the grooves are vertically aligned and vertically misaligned. When vertically aligned, the elastic element pops the nozzle outward to open the air outlet and flow channel. When vertically misaligned, it pushes the turntable inward to close the air outlet and flow channel.

10. The aerosol filtration device according to claim 9, characterized in that, The base has a circumferentially arranged limiting groove at one end away from the melting cup, and a limiting buckle is provided on the outer periphery of the turntable and placed in the limiting groove to restrict the turntable from rotating within the range of the limiting groove.

11. The aerosol filtration device according to claim 8, characterized in that, The turntable has a second sealing element on the side near the base for sealing the air outlet, and the base has a trapezoidal groove with a smaller inner diameter and a larger outer diameter on the side that contacts the second sealing element. The air outlet is located at the bottom of the trapezoidal groove, and the inner and outer circumferences of the second sealing element have chamfered bevels that seal against the trapezoidal groove.

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