CN216776108U - Filtering smoking set with back-blowing prevention structure - Google Patents

Abstract

The utility model relates to a filtering smoking set with a back-blowing prevention structure. This take filtration smoking set of anti-blowback structure includes: an atomizer for generating an aerosol; the filter pipe is provided with a first air inlet and a first air outlet, the filter pipe is connected with the atomizer, and an outlet of the atomizer is communicated with the first air inlet of the filter pipe; the filter pipe is used for filtering the aerial fog flowing from the first air inlet to the first air outlet; the anti-back-blowing assembly comprises a mounting seat and a moving piece, the mounting seat is mounted on the filter pipe and is provided with a communicating channel, the communicating channel is provided with a second air inlet and a second air outlet, the second air inlet is communicated with the first air outlet, and the moving piece is movably arranged in the communicating channel; the moving member can move to a conducting position where the communicating channel is conducted under the pushing of the air flow flowing from the second air inlet to the second air outlet, and can move to a stopping position where the communicating channel is stopped under the pushing of the air flow flowing from the second air outlet to the second air inlet.

Description

Filtering smoking set with back-blowing prevention structure

Technical Field

The utility model relates to the technical field of atomization, in particular to a filtering smoking set with a back-blowing prevention structure.

Background

The filter smoking set is used for atomizing the atomizing matrix to generate aerosol, and the generated aerosol flows out along with airflow generated by the user in smoking and is finally sucked by the user. Since the aerosol may contain harmful fine particles and the like, which affect taste and health of the user, the aerosol is often filtered by water before being inhaled by the user.

Traditional filtration smoking set includes atomizer, filter tube and suction nozzle, and the atomizer atomizes and produces aerial fog, and aerial fog gets into the filter tube to utilize the water in the filter tube to filter, the aerial fog after the filtration gets into the suction nozzle, finally is inhaled by the user and eats. However, when the user mistakenly blows air into the suction nozzle in the reverse direction, the water in the filter pipe is easily blown into the atomizer, so that the function of the device is damaged, and the use of the device is affected.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a filtering smoking set with a back-blowing prevention structure to overcome the above-mentioned drawbacks, in order to solve the problem that when a user performs a wrong operation to blow air in a direction, filtered water is likely to flow into the atomizer, thereby destroying the function of the filtering smoking set and affecting the use of the filtering smoking set.

A filter smoking set with a back-blowing prevention structure comprises:

an atomizer for generating an aerosol;

the filter pipe is provided with a first air inlet and a first air outlet, the filter pipe is connected with the atomizer, and an outlet of the atomizer is communicated with the first air inlet of the filter pipe; the filter pipe is used for filtering the aerial fog flowing from the first air inlet to the first air outlet; and

the anti-back-blowing assembly comprises a mounting seat and a moving member, the mounting seat is mounted on the filter pipe and is provided with a communicating channel, the communicating channel is provided with a second air inlet and a second air outlet, the second air inlet is communicated with the first air outlet, and the moving member is movably arranged in the communicating channel; a plurality of limiting bulges are convexly arranged on the inner wall of the communicating channel, the limiting bulges are arranged at intervals along the circumferential direction of the communicating channel, and an air passing channel for air flow to pass through is formed between every two adjacent limiting bulges;

the moving member can move to a conducting position where the moving member abuts against the limiting protrusions under the pushing of the air flow flowing from the second air inlet to the second air outlet, and can move to a stopping position where the communicating channel is stopped under the pushing of the air flow flowing from the second air outlet to the second air inlet.

In one embodiment, the communication channel comprises an air inlet section, a middle section and an air outlet section which are sequentially communicated, the second air inlet is positioned at one end of the air inlet section, which is far away from the middle section, and the second air outlet is positioned at one end of the air outlet section, which is far away from the middle section; the limiting bulges are positioned on the air outlet section or the middle section;

when the moving member moves to the stop position, the moving member is located at the air inlet section to close the second air inlet; when the moving member moves to the communication position, the moving member is separated from the air intake section.

In one embodiment, when the moving member moves to the stop position, the moving member is in sealing fit with the inner wall of the air inlet section.

In one embodiment, the limiting protrusions are located at one end of the air outlet section close to the second air inlet, and the limiting protrusions are distributed at intervals along the edge of the second air outlet.

In one embodiment, the radial dimension of one end of the air inlet section, which is close to the middle section, is larger than that of the moving part;

the radial dimension of the air inlet section gradually decreases from one end close to the middle section to one end close to the second air inlet;

the radial dimension of one end of the air inlet section close to the second air inlet is smaller than that of the moving part.

In one embodiment, the radial dimension of the intermediate section is greater than the radial dimension of the displacement member.

In one embodiment, the moving member is a sphere.

In one embodiment, the filtering pipe comprises an outer pipe, a middle pipe and an inner pipe, wherein the outer pipe and the middle pipe are filled with filtering liquid;

the outer tube is provided with an air inlet end and an air outlet end opposite to the air inlet end, the first air inlet is formed in the air inlet end, and the first air outlet is formed in the air outlet end;

the middle pipe is positioned in the outer pipe and is provided with a connecting end and a closed end opposite to the connecting end, the connecting end is connected with the air inlet end in a sealing manner, the closed end extends towards the air outlet end, the middle pipe is provided with a communicating hole penetrating through the middle pipe from inside to outside, and the communicating hole is positioned below the liquid level of the filtrate;

the inner tube is located in the middle tube, and is provided with a gas input end and a gas output end opposite to the gas input end, the gas input end is connected with the first gas inlet, the gas output end extends towards the closed end, and the gas output end is located above the liquid level of the filtering liquid.

In one embodiment, the middle pipe comprises a plurality of middle pipes, the middle pipes are sequentially sleeved from inside to outside, and the inner pipe is located in the innermost middle pipe.

In one embodiment, the filtering smoking set with the back-blowing prevention structure further comprises a suction nozzle, and the suction nozzle is mounted on the mounting seat and is communicated with the second air outlet.

Above-mentioned take filtration smoking set of blowback structure of preventing, when the user normally sucks (the air current gets into the intercommunication passageway by the second air inlet promptly to flow out by the second gas outlet), the moving member removes to the position of switching on under the promotion of air current, makes the intercommunication passageway switch on. At this moment, the aerial fog that the atomizer produced is followed the air current and is got into the filter tube by first air inlet for the filter tube filters aerial fog, then flows out the filter tube from first gas outlet. The air flow flowing out of the filter pipe enters the communicating channel from the second air inlet and is output from the second air outlet of the communicating channel after passing through the air channel, and then is sucked by a user.

When the user mistakenly operates and blows air reversely, the air flow blown out by the user enters the communicating channel from the second air outlet, so that the moving piece is pushed to move to the stopping position, and the communicating channel is stopped. At the moment, the airflow blown out by the user can not enter the filter pipe through the communication channel, so that the situation that the filtered liquid in the filter pipe enters the atomizer under the pushing of the back blowing airflow is avoided, and the purpose of preventing back blowing is achieved.

Drawings

FIG. 1 is an exploded view of a filter smoking set with a blowback prevention structure according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the filter smoking article shown in FIG. 1 with a blow-back prevention structure;

FIG. 3 is a cross-sectional view of the filter tube and anti-blowback assembly of the filter smoking article with the anti-blowback arrangement shown in FIG. 2;

FIG. 4 is a schematic view showing the flow direction of the air flow and the filtrate in the filter tube during back flushing by a user without assembling the back flushing prevention assembly;

FIG. 5 is a cross-sectional view of the anti-blowback assembly of the filter smoking article with the anti-blowback arrangement shown in FIG. 1 (the movable member in a deactivated position);

FIG. 6 is a cross-sectional view of the anti-blowback assembly of the filter smoking article with the anti-blowback arrangement shown in FIG. 1 (the moveable member is between the off position and the on position);

FIG. 7 is a cross-sectional view of the anti-blowback assembly of the filtering smoking article with the anti-blowback arrangement shown in FIG. 1 (the moveable member in the on position);

FIG. 8 is a top view of the anti-blowback assembly shown in FIG. 7.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1 to 3, an embodiment of the utility model provides a filter smoking set with a back-blowing prevention structure, which includes an atomizer 10, a filter tube 20 and an anti-back-blowing assembly 30. The atomizer 10 is used to atomize an atomized material to produce an aerosol. The filter tube 20 is used to filter the aerosol generated by the atomizer 10. The back-blowing prevention assembly 30 is disposed at the outlet of the filter tube 20, and is used for preventing the filtered liquid (e.g. water) in the filter tube 20 from flowing to the atomizer 10 when a user blows air (i.e. blows air in a reverse direction) to the outlet of the filter tube 20, so as to destroy the function of the atomizer 10 and affect the use of the user.

The filter tube 20 has a first inlet 211 and a first outlet 212. The filter tube 20 is connected with the atomizer 10, and the first air inlet 211 of the filter tube 20 is communicated with the outlet of the atomizer 10, so that the aerosol generated by atomization of the atomizer 10 can enter the filter tube 20 from the first air inlet 211 along with the air flow, and the aerosol filtered by the filter tube 20 continuously flows out from the first air outlet 212 along with the air flow. The back-blowing prevention assembly 30 includes a mounting seat 31 and a moving member 32, wherein the mounting seat 31 is mounted on the filtering pipe 20 and has a communication passage 311. The communication passage 311 has a second air inlet 312 and a second air outlet 313, and the second air inlet 312 is communicated with the first air outlet 212 of the filter tube 20, so that the air flow flowing out from the first air outlet 212 of the filter tube 20 enters the communication passage 311 to be sucked by the user. The moving member 32 is movably disposed in the communication passage 311, so that the moving member 32 can move along the communication passage 311 under the pushing of the air flow. A plurality of limiting protrusions 314 are convexly arranged on the inner wall of the communication channel 311, the limiting protrusions 314 are arranged at intervals along the circumferential direction of the communication channel 311, and an air passing channel 315 for air flow to pass through is formed between every two adjacent limiting protrusions 314.

Under the pushing of the airflow flowing from the second air inlet 312 to the second air outlet 313 of the filter tube 20, the moving member 32 can move to the conducting position (see fig. 7), at this time, the moving member 32 abuts against the plurality of limiting protrusions 314, so that the airflow can pass through the air passing channel 315 between every two adjacent limiting protrusions 314, that is, the communicating channel 311 is in the conducting state, that is, the airflow can smoothly enter the communicating channel 311 from the second air inlet 312 and flow out from the second air outlet 313 of the communicating channel 311 after passing through the air channel 315. The moving member 32 can move to the blocking position (shown in fig. 5) under the pushing of the air flow from the second air outlet 313 of the filter tube 20 to the second air inlet 312, and at this time, the communication passage 311 is blocked, i.e., the air flow cannot flow out from the second air inlet 312 of the communication passage 311.

When the user sucks the cigarette normally (i.e. the airflow enters the communicating channel 311 from the second air inlet 312 and flows out from the second air outlet 313), the moving member 32 moves to the conducting position under the pushing of the airflow, so that the communicating channel 311 is conducted. At this time, the aerosol generated by the atomizer 10 enters the filter tube 20 through the first air inlet 211, so that the filter tube 20 filters the aerosol and then flows out of the filter tube 20 through the first air outlet 212. The airflow flowing out of the filtering pipe 20 enters the communicating channel 311 from the second air inlet 312, and is output from the second air outlet 313 of the communicating channel 311 after passing through the air channel 315, so as to be sucked by the user.

When the user blows air reversely by misoperation, the air flow blown by the user enters the communication channel 311 from the second air outlet 313, so that the moving member 32 is pushed to move to the stop position, and the communication channel 311 is stopped. At this time, the airflow blown out by the user cannot enter the filter tube 20 through the communication channel 311, so that the filtered liquid in the filter tube 20 is prevented from entering the atomizer 10 under the pushing of the blowback airflow, and the blowback prevention purpose is achieved.

Fig. 4 shows the flow direction of the air flow when the user blows air in a reverse direction by mistake without the blowback prevention assembly 30. As shown in fig. 4, the airflow blown out by the user enters the filter tube 20 through the first air outlet 212, so as to push the filtrate a to flow out from the first air inlet 211 into the atomizer 10, thereby destroying the function of the atomizer 10 and affecting the use of the user. The arrangement of the back-blowing prevention assembly 30 prevents the air flow blown back by the user from entering the filter tube 20 through the first air outlet 212, thereby preventing this situation from happening and achieving the purpose of back-blowing prevention.

Alternatively, the moving member 32 may be a ball, which is beneficial for the moving member 32 to move smoothly along the communication channel 311 under the push of the air flow.

Referring to fig. 5 to 7, in the embodiment of the utility model, the communication channel 311 includes an air inlet section 3111, an intermediate section 3112 and an air outlet section 3113 which are sequentially communicated. The second air inlet 312 is located at one end of the air inlet section 3111 far away from the middle section 3112, and the second air outlet 313 is located at one end of the air outlet section 3113 far away from the middle section 3112. The plurality of limiting protrusions 314 are located in the air outlet section 3113 or the middle section 3112.

When the moving member 32 moves to the stop position (as shown in fig. 5), the moving member 32 is located at the air inlet section 3111 to close the second air inlet 312, so as to prevent the reverse air flow from flowing from the second air inlet 312 to the inside of the filtering pipe 20. When the moving member 32 moves to the communicating position (as shown in fig. 7), the moving member 32 is separated from the air inlet section 3111 and abuts against the plurality of limiting protrusions 314, so that the air flow passing through the filtering pipe 20 can enter the communicating channel 311 through the second air inlet 312 and flow out of the second air outlet 313 of the communicating channel 311 after passing through the air channel 315, and then is sucked by the user.

In particular, in the embodiment, when the moving member 32 moves to the stop position, the moving member 32 is in sealing contact with the inner wall of the air intake section 3111. In this way, the moving member 32 is in sealing engagement with the inner wall of the air inlet section 3111 to seal the second air inlet 312, thereby achieving the effect of preventing back flushing. Further, the shape of the moving member 32 matches with the inner wall of the air intake section 3111, so that the moving member 32 can closely adhere to the inner wall of the air intake section 3111, and the sealing effect on the second air inlet 312 is ensured. For example, the moving member 32 is spherical, and the inner wall of the air inlet section 3111 is at least partially a circular arc surface, so that the spherical surface of the moving member 32 completely fits the circular arc surface, and further seals the second air inlet 312.

Specifically, in the embodiment, the limiting protrusions 314 are located at one end of the air outlet section 3113 close to the second air inlet 312, and the limiting protrusions 314 are arranged at intervals along the edge of the second air outlet 313. Thus, the plurality of limiting protrusions 314 are arranged to limit the moving member 32, so that the moving member 32 is prevented from being separated from the second air outlet 313; on the other hand, the air passage 315 is formed, so that when the moving member 32 abuts against the plurality of limiting protrusions 314, the air flow entering the communicating passage 311 can circulate through the air passage 315, and the moving member 32 is prevented from completely closing the second air outlet 313.

Further, a radial dimension of an end of the air intake section 3111 near the middle section 3112 is larger than a radial dimension of the moving member 32, so that the moving member 32 can move to the air intake section 3111. The radial dimension of the air intake section 3111 gradually decreases from the end near the middle section 3112 to the end near the second air inlet 312, so that the inner wall of the air intake section 3111 can better fit with the moving member 32. The radial dimension of the end of the intake section 3111 near the second intake port 312 is smaller than the radial dimension of the moving member 32, thereby preventing the moving member 32 from coming out of the second intake port 312. So, moving member 32 can be under the promotion of blowback air current, move to air intake section 3111 by interlude 3112, and closely laminate with the inner wall of air intake section 3111, realize the closure to second air inlet 312.

In particular, in the embodiment, the radial dimension of the middle section 3112 is larger than the radial dimension of the moving member 32, so that the moving member 32 can be smoothly moved to the off position or the on position along the communication passage 311 by the push of the air flow.

In the embodiment of the present invention, the filtering smoking set with the anti-blowback structure further includes a suction nozzle 40, the suction nozzle 40 is mounted on the mounting seat 31 and is communicated with the second air outlet 313, so that when a user sucks through the suction nozzle 40, the aerosol flows out from the second air outlet 313 along with the air flow and enters the suction nozzle 40, and then is sucked by the user.

Referring to fig. 3, in the embodiment of the present invention, the filtering pipe 20 includes an outer pipe 21, a middle pipe 22 and an inner pipe 23. The outer tube 21 and the middle tube 22 contain a filtering liquid a (which may be water) for filtering the aerosol. The outer tube 21 has an air inlet end 213 and an air outlet end 214 opposite to the air inlet end 213, the first air inlet 211 is opened at the air inlet end 213, and the first air outlet 212 is opened at the air outlet end 214. The middle tube 22 is located within the outer tube 21 and has a connection end 221 and a closed end 222 opposite the connection end 221. The connection end 221 is sealingly connected to the intake end 213. The closed end 222 extends toward the air outlet end 214. The middle tube 22 is provided with a communication hole 223 penetrating the inside and outside of the middle tube 22, and the communication hole 223 is positioned below the liquid level of the filtrate a.

The inner tube 23 is located within the middle tube 22 and has a gas input 231 and a gas output 232 opposite the gas input 231. The gas input 231 is connected to the first gas inlet 211, the gas output 232 extends toward the closed end 222, and the gas output 232 is located above the liquid level of the filtrate a. In this way, the gas mist generated by the atomizer 10 flows through the first gas inlet 211, the inner tube 23, the middle tube 22, the communication hole 223, the outer tube 21 and the first gas outlet 212 in sequence, so that the filtrate a located in the middle tube 22 and the outer tube 21 filters the gas flow. Moreover, the gas outlet 232 of the inner tube 23 is located above the liquid level of the filtrate a, so that the filtrate a does not enter the inner tube 23.

Further, well pipe 22 can include a plurality of, and this a plurality of well pipes 22 from interior to exterior overlap in proper order establishes, and inner tube 23 is located the well pipe 22 of the innermost side to the air current that flows out by the gas output end 232 of inner tube 23 flows through each well pipe 22 from interior to exterior in proper order, has prolonged the filtration route, is favorable to improving the filter effect. Of course, in the embodiment shown in fig. 3, only one middle tube 22 may be provided, as long as the filtering requirement can be met, which is not limited herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a filter smoking set of blowback structure is prevented in area which characterized in that includes:

an atomizer (10) for generating an aerosol;

a filter pipe (20) having a first air inlet (211) and a first air outlet (212), the filter pipe (20) being connected to the atomizer (10), and an outlet of the atomizer (10) being in communication with the first air inlet (211) of the filter pipe (20); the filter pipe (20) is used for filtering the aerial fog flowing from the first air inlet (211) to the first air outlet (212); and

the anti-back-blowing assembly (30) comprises a mounting seat (31) and a moving part (32), the mounting seat (31) is mounted on the filter pipe (20) and is provided with a communication channel (311), the communication channel (311) is provided with a second air inlet (312) and a second air outlet (313), the second air inlet (312) is communicated with the first air outlet (212), and the moving part (32) is movably arranged in the communication channel (311); a plurality of limiting bulges (314) are convexly arranged on the inner wall of the communication channel (311), the limiting bulges (314) are distributed at intervals along the circumferential direction of the communication channel (311), and an air passing channel (315) for air flow to pass is formed between every two adjacent limiting bulges (314);

wherein the moving member (32) can move to a conducting position in contact with the plurality of limiting protrusions (314) under the pushing of the airflow flowing from the second air inlet (312) to the second air outlet (313); the moving member (32) is movable to a cut-off position where the communication passage (311) is cut off, pushed by the airflow flowing from the second air outlet (313) to the second air inlet (312).

2. The filtering smoking set with the back-blowing prevention structure according to claim 1, wherein the communication channel (311) comprises an air inlet section (3111), a middle section (3112) and an air outlet section (3113) which are sequentially communicated, the second air inlet (312) is located at one end of the air inlet section (3111) far away from the middle section (3112), and the second air outlet (313) is located at one end of the air outlet section (3113) far away from the middle section (3112); the limiting protrusions (314) are positioned on the air outlet section (3113) or the middle section (3112);

when the moving member (32) moves to the stop position, the moving member (32) is located at the air intake section (3111) to close the second air intake port (312); when the moving member (32) moves to the communication position, the moving member (32) is separated from the intake section (3111).

3. A filter smoking article with a blowback prevention structure in accordance with claim 2, wherein when said moving member (32) is moved to said off position, said moving member (32) is in sealing engagement with an inner wall of said air intake section (3111).

4. The filtering smoking set with the back-blowing prevention structure according to claim 2, wherein the plurality of limiting protrusions (314) are located at one end of the air outlet section (3113) close to the second air inlet (312), and the plurality of limiting protrusions (314) are arranged at intervals along the edge of the second air outlet (313).

5. A filtering smoking article with anti-blowback arrangement according to claim 4, wherein the end of the air inlet section (3111) adjacent to the intermediate section (3112) has a radial dimension greater than the radial dimension of the moving member (32);

the radial dimension of the air intake section (3111) decreases from one end near the intermediate section (3112) to one end near the second air intake opening (312);

the radial dimension of the end of the air inlet section (3111) close to the second air inlet (312) is smaller than the radial dimension of the moving part (32).

6. A filtering smoking article with a blowback prevention structure according to claim 2, wherein the intermediate section (3112) has a radial dimension greater than a radial dimension of the moving member (32).

7. A filter smoking article with a blowback prevention structure in accordance with claim 1, wherein said moving member (32) is a sphere.

8. The filtering smoking set with the back-blowing prevention structure according to any one of the claims 1 to 7, wherein the filtering pipe (20) comprises an outer pipe (21), a middle pipe (22) and an inner pipe (23), and the outer pipe (21) and the middle pipe (22) are filled with filtering liquid (A);

the outer tube (21) is provided with an air inlet end (213) and an air outlet end (214) opposite to the air inlet end (213), the first air inlet (211) is arranged at the air inlet end (213), and the first air outlet (212) is arranged at the air outlet end (214);

the middle pipe (22) is positioned in the outer pipe (21) and is provided with a connecting end (221) and a closed end (222) opposite to the connecting end (221), the connecting end (221) is connected with the air inlet end (213) in a sealing mode, the closed end (222) extends towards the air outlet end (214), the middle pipe (22) is provided with a communication hole (223) penetrating through the inner portion and the outer portion of the middle pipe (22), and the communication hole (223) is positioned below the liquid level of the filtrate (A);

the inner pipe (23) is located in the middle pipe (22) and is provided with a gas input end (231) and a gas output end (232) opposite to the gas input end (231), the gas input end (231) is connected to the first gas inlet (211), the gas output end (232) extends towards the closed end (222), and the gas output end (232) is located above the liquid level of the filtering liquid (A).

9. The filtering smoking set with the blowback prevention structure according to claim 8, wherein the number of the middle tubes (22) is plural, the plural middle tubes (22) are sequentially sleeved from inside to outside, and the inner tube (23) is located inside the innermost middle tube (22).

10. The filtering smoking set with the back-blowing prevention structure according to any one of claims 1 to 7, wherein the filtering smoking set with the back-blowing prevention structure further comprises a suction nozzle (40), and the suction nozzle (40) is mounted on the mounting seat (31) and is communicated with the second air outlet (313).

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