Accommodating tube, and aerosol generating device and system

Abstract

The present application provides an accommodating tube, and an aerosol generating device and system. The accommodating tube is configured to accommodate at least part of an aerosol generating article, and the accommodating tube comprises an annular side wall, a bottom wall, and a limiting structure. The bottom wall is connected to the annular side wall and is provided with a plurality of air channel holes, and the air channel holes are capillary holes. The limiting structure is located in the accommodating tube and configured to limit the aerosol generating article in the insertion direction of the aerosol generating article, so that the aerosol generating article is spaced apart from the bottom wall. In this way, the limiting structure enables the aerosol generating article and the bottom wall of the accommodating tube to be spaced apart to define a condensation cavity; and a condensate of aerosol formed by atomization may be stored in the condensation cavity, and part of the condensate in the condensation cavity is adsorbed into the air channel holes under the capillary action of the air channel holes and blocks the air channel holes, thereby effectively preventing the condensate in the condensation cavity and subsequently generated aerosol from overflowing from the accommodating tube, reducing the condensate retention on the outer side of the accommodating tube, and reducing the risk of odor generation.

Description

A containing tube, aerosol generating device and system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority based on Chinese patent application 2024202052974 filed on January 26, 2024 and Chinese patent application 2023231840768 filed on November 23, 2023, all of which are incorporated herein by reference.

Technical field

[0003] The present invention relates to the field of electronic atomization technology, and in particular to a containing tube, an aerosol generating device and a system. [Background Technology]

[0004] A heat-not-burn (HNB) aerosol-generating system is a combination of an aerosol-generating device and an aerosol-generating product. The aerosol-generating device includes a housing tube for housing the aerosol-generating product and a heating assembly for heating the aerosol-generating product at high temperatures to form an aerosol.

[0005] However, the condensate of the aerosol generated by atomization in the existing aerosol generating device will be adsorbed on the containing tube, and will produce odor over a long period of time.

[0006] [Summary of the invention]

[0007] The containing tube, aerosol generating device and system provided in the present application are intended to solve the problem of aerosol condensate adhering to the containing tube and generating odor for a long time.

[0008] To address the above technical issues, the present application adopts a technical solution: providing a container tube for accommodating at least a portion of an aerosol-generating article. The container tube comprises an annular sidewall; a bottom wall connected to the annular sidewall and having a plurality of capillary air passage holes; and a retaining structure located within the container tube for retaining the aerosol-generating article in its insertion direction, such that the aerosol-generating article is spaced apart from the bottom wall.

[0009] In one embodiment, a distance between a side surface of the limiting structure facing away from the bottom wall and the bottom wall is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0010] In one embodiment, the width of the limiting structure is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

[0011] In one embodiment, the limiting structure is a protruding ring provided on the bottom wall and extending along the periphery of the bottom wall.

[0012] In one embodiment, the airway hole is a non-strip hole, and the pore diameter of the non-strip hole is greater than or equal to 0.1 mm and less than or equal to 0.8 mm; or the airway hole is a strip hole, and the width of the strip hole is greater than or equal to 0.1 mm and less than or equal to 0.8 mm.

[0013] In one embodiment, the bottom wall further has a first through hole for allowing the heating body to pass through, and the plurality of air passage holes are distributed in a circumferential direction around the first through hole.

[0014] In one embodiment, the ratio of the total cross-sectional area of ​​all the airway holes to the cross-sectional area of ​​the bottom wall is 15%-60%; wherein the cross-sectional area of ​​the bottom wall does not include the cross-sectional area of ​​the first through hole.

[0015] In order to solve the above technical problems, the second technical solution provided in this application is: to provide an aerosol generating device, comprising: a shell assembly; a bracket, arranged in the shell assembly, and having an installation groove; a receiving tube, arranged in the installation groove, and cooperating with the groove wall of the installation groove to form an air inlet channel; a heating assembly, arranged in the shell assembly, for heating the aerosol generating product; wherein, the receiving tube is the receiving tube described above.

[0016] In one embodiment, the aerosol generating device further includes: an airway cover, which is arranged between the bottom wall of the accommodating tube and the bottom wall of the mounting groove; the airway cover has a second through hole arranged corresponding to the first through hole; wherein, the heating component is arranged at the bottom of the mounting groove, and the heating component includes a heating body; the heating body passes through the second through hole and the first through hole into the accommodating tube; the heating body is in contact with the hole wall of the second through hole.

[0017] In one embodiment, the surface of the airway cover facing the bottom wall of the accommodating tube has a first annular protrusion surrounding the second through hole; the first annular protrusion surrounds the heating body and is in contact with the heating body; the bottom wall of the accommodating tube is supported by the first annular protrusion and is spaced apart from the airway cover; and / or the surface of the airway cover facing away from the bottom wall of the accommodating tube has a second annular protrusion surrounding the second through hole; the second annular protrusion surrounds the heating body and is in contact with the heating body.

[0018] In one embodiment, a distance between a surface of the bottom wall of the accommodating tube facing the airway cover and a surface of the airway cover facing the bottom wall of the accommodating tube is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

[0019] In one embodiment, a surface of the airway cover facing the bottom wall of the accommodating tube and an outer surface of the bottom wall of the accommodating tube are both planes.

[0020] In one embodiment, the thermal conductivity of the airway cover is greater than the thermal conductivity of the bracket.

[0021] To address the aforementioned technical issues, the present application provides a third technical solution: an aerosol generating system comprising: an aerosol generating device as described above; an aerosol generating article, adapted to be at least partially inserted into the housing tube and abutting against a surface of the housing tube's retaining structure facing away from the bottom wall; and a circumferential sealing structure formed at least at one point between the inner wall of the housing tube and the outer wall of the aerosol generating article. The aerosol generating article, the bottom wall of the housing tube, and a portion of the annular side wall form a sealed condensation chamber, which is connected to the air inlet passage through the airway hole.

[0022] Advantageous Effects of the Present Application: Unlike the prior art, the present application provides a containment tube for accommodating at least a portion of an aerosol-generating article. The containment tube comprises an annular sidewall, a bottom wall, and a retaining structure. The bottom wall is connected to the annular sidewall and has a plurality of capillary air passage holes. The retaining structure is located within the containment tube and is used to position the aerosol-generating article along its insertion direction, thereby ensuring a spacing between the aerosol-generating article and the bottom wall. Among them, by setting a limiting structure in the receiving tube, a plurality of airway holes are opened on the bottom wall of the receiving tube, and the airway holes are made into capillary holes; in this way, when the receiving tube accommodates the aerosol generating product, the limiting structure can be used to separate the aerosol generating product from the bottom wall of the receiving tube to define a condensation chamber; the aerosol generated by the atomization of the aerosol generating product can be stored in the condensation chamber, and part of the condensation in the condensation chamber is adsorbed into the airway hole under the capillary action of the airway hole, and the airway hole is blocked, thereby effectively preventing the condensation in the condensation chamber and the subsequently generated aerosol from overflowing from the receiving tube, reducing the residual condensation outside the receiving tube and reducing the risk of generating odor. Moreover, during the suction process, the condensation in the airway hole is re-sucked into the condensation chamber under the action of the pressure difference and absorbed by the aerosol generating product. This cycle is repeated, effectively reducing the formation of condensation inside and outside the receiving tube, reducing the risk of odor caused by long-term adsorption of condensation inside and outside the receiving tube; and at the same time improving the effective utilization rate of the aerosol.

Brief Description of the Drawings

[0023] FIG1 is a schematic diagram of the overall structure of an aerosol generating system provided in one embodiment of the present application;

[0024] FIG2 is a cross-sectional view taken along line AA of the aerosol generating system shown in FIG1 according to an embodiment of the present application;

[0025] FIG3 is a schematic structural diagram of the aerosol generating device in FIG2 ;

[0026] FIG4 is an enlarged view of point P in FIG3 ;

[0027] FIG5a is a schematic vertical cross-sectional view of a housing tube provided in one embodiment of the present application;

[0028] FIG5 b is a vertical cross-sectional view of a housing tube provided in a specific embodiment of the present application;

[0029] FIG6 is a schematic structural diagram of the accommodation tube provided in the first embodiment of the present application at a first viewing angle;

[0030] FIG7 is a schematic structural diagram of a housing tube provided in a second embodiment of the present application at a first viewing angle;

[0031] FIG8 is a schematic structural diagram of a housing tube provided in a third embodiment of the present application at a first viewing angle;

[0032] FIG9 is a schematic structural diagram of an aerosol generating product housed in a housing tube;

[0033] FIG10 is a schematic diagram of the overall structure of an airway cover provided in one embodiment of the present application;

[0034] FIG11 is a sectional view taken along line BB of the airway cover shown in FIG10 ;

[0035] FIG12 is an enlarged view of a point Q in FIG2 according to another embodiment of the present application.

[0036] Description of Figure Numbers:

[0037] 1-aerosol generating article; 11-filter segment; 12-connecting segment; 13-substrate segment; 131-aerosol generating substrate.

[0038] 2-aerosol generating device; 21-containing tube; 211-annular side wall; 212-bottom wall; 213-airway hole; 214-first through hole; 215-convex ring; 216-condensation chamber; 217-limiting structure; 218-third annular protrusion; 22-housing assembly; 23-bracket; 24-mounting groove; 25-air inlet channel; 26-heating body; 27-airway cover; 271-second through hole; 272-main body; 273-first annular protrusion; 274-second annular protrusion. [Specific implementation method]

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0043] Please refer to Figure 1, which is a schematic diagram of the overall structure of an aerosol generating system provided in one embodiment of the present application. Figure 2 is a cross-sectional view taken along the AA direction of the aerosol generating system shown in Figure 1, provided in one embodiment of the present application. In this embodiment, an aerosol generating system is provided that can be used in various fields such as medical treatment, cosmetic treatment, and leisure smoking. The aerosol generating system includes an aerosol generating product 1 and an aerosol generating device 2. The aerosol generating product 1 includes a filter segment 11, a connecting segment 12, and a matrix segment 13 connected in sequence. The matrix segment 13 includes an aerosol generating matrix 131. The aerosol generating device 2 is configured to heat the aerosol generating matrix 131 to form an aerosol when powered. The filter segment 11 is configured to filter the aerosol. The connecting segment 12 is configured to reduce the temperature of the aerosol formed by atomization to prevent burns to the mouth. The other specific structures and functions of the filter segment 11, connecting segment 12, and matrix segment 13 are the same as or similar to those of existing aerosol generating products and will not be described in detail here.

[0044] Referring to Figures 3 and 4, Figure 3 is a schematic structural diagram of the aerosol generating device in Figure 2; Figure 4 is an enlarged view of point P in Figure 3. The aerosol generating device 2 includes a accommodating tube 21, a shell assembly 22, a bracket 23, and a heating assembly. The accommodating tube 21 is used to accommodate the aerosol generating product 1. The bracket 23 is arranged in the shell assembly 22, and the bracket 23 has a mounting groove 24. The accommodating tube 21 is arranged in the mounting groove 24, and the outer wall surface of the accommodating tube 21 cooperates with the inner wall surface of the mounting groove 24 to form an air inlet channel 25. External air enters the matrix segment 13 of the aerosol generating product 1 from the bottom of the accommodating tube 21 through the air inlet channel 25, and carries the aerosol generated by the matrix segment 13 out of the filter segment 11 for inhalation by the user. The specific structure and function of the accommodating tube 21 can be found in the relevant description of the accommodating tube 21 in the following embodiments.

[0045] The heating assembly is disposed in the housing assembly 22. The heating assembly includes a heating body 26, which is disposed at the bottom of the mounting groove 24 and extends into the receiving tube 21, for inserting the aerosol generating article 1 and heating the aerosol generating article 1 when powered on.

[0046] Of course, the aerosol generating device 2 also includes components such as a power supply, a circuit board, a seal, and a fixing part. The specific structure and function of these components are the same or similar to the specific structure and function of the relevant components in the existing aerosol generating device, and can achieve the same or similar technical effects. For details, please refer to the existing technology.

[0047] In one embodiment, as shown in Figures 5a and 5b, Figure 5a is a simplified vertical cross-sectional view of a containment tube provided in one embodiment of the present application; Figure 5b is a vertical cross-sectional view of a containment tube provided in a specific embodiment of the present application. The containment tube 21 includes an annular sidewall 211, a bottom wall 212, and a retaining structure 217. The annular sidewall 211 is continuous, i.e., it does not have a through-hole structure. The bottom wall 212 is connected to the annular sidewall 211 and encloses a containment cavity for accommodating the aerosol-generating article 1.

[0048] The bottom wall 212 has a plurality of airway holes 213 and a first through hole 214. The heating element is inserted into the containing tube 21 through the first through hole 214. The first through hole 214 can be opened at the center of the bottom wall 212, so that the heating element can be used to uniformly heat the aerosol generating product 1 accommodated in the containing tube 21. Specifically, the aperture of the first through hole 214 is greater than or equal to 2.5 mm and less than or equal to 3.5 mm, for example, it can be 2.5 mm, 3.0 mm or 3.5 mm. The cross-sectional shape of the first through hole 214 can be circular. The central axis of the circular first through hole 214 coincides with the central axis of the containing tube 21.

[0049] The airway holes 213 are capillary pores, which have capillary forces. Due to the surface tension of liquids, liquids can be adsorbed into the capillary pores by the capillary forces and close the capillary pores. Multiple airway holes 213 are evenly distributed around the first through hole 214 along the circumference. The multiple airway holes 213 are spaced apart outside the first through hole 214 to reduce the amount of heat transferred from the periphery of the first through hole 214 toward the annular sidewall 211, thereby focusing the heat around the periphery of the first through hole 214 and reducing the generation of condensation.

[0050] In a specific embodiment, referring to FIG6 , FIG6 is a schematic structural diagram of the containment tube provided in the first embodiment of the present application at a first viewing angle; the airway hole 213 is a non-strip hole, that is, the cross-sectional shape of the airway hole 213 is non-strip; for example, the airway hole 213 is a circular hole or a square hole. The aperture of the non-strip hole is greater than or equal to 0.1 mm and less than or equal to 0.8 mm; for example, it can be 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm or 0.8 mm, etc. Among them, the aperture of the non-strip hole is less than 0.1 mm or greater than 0.8 mm, which is not conducive to the capillary action of the airway hole 213 and cannot better adsorb the condensate. Preferably, the aperture of the non-strip hole is greater than or equal to 0.3 mm and less than or equal to 0.5 mm; for example, it is 0.3 mm, 0.4 mm, or 0.5 mm. Among them, when the airway hole 213 is a circular hole, the aperture of the airway hole 213 is the diameter of the corresponding circle; when the airway hole 213 is a square hole, the aperture of the airway hole 213 is the size of the diagonal of the corresponding square; when the airway hole 213 is an irregular shape, the aperture of the airway hole 213 is the shortest distance between the two vertices of the corresponding shape.

[0051] In this embodiment, the plurality of airway holes 213 are of uniform shape and size and form at least one ring surrounding the first through hole 214. Among the plurality of airway holes 213 in the same ring, the spacing between each two adjacent airway holes 213 is the same, and the distance between each airway hole 213 and the first through hole 214 is also the same.

[0052] In another specific embodiment, referring to Figures 7 and 8, Figure 7 is a schematic structural diagram of the accommodation tube provided in the second embodiment of the present application at a first viewing angle; the airway hole 213 is a strip-shaped hole, that is, the cross-sectional shape of the airway hole 213 is a strip-shaped hole; for example, as shown in Figure 7, the cross-sectional shape of the airway hole 213 can be an arc; or as shown in Figure 8, Figure 8 is a schematic structural diagram of the accommodation tube provided in the third embodiment of the present application at a first viewing angle. The cross-sectional shape of the airway hole 213 can be a long strip, etc. The width M of the strip-shaped hole is greater than or equal to 0.1 mm and less than or equal to 0.8 mm; for example, it can be 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm or 0.8 mm, etc. Preferably, the width M of the strip-shaped hole is greater than or equal to 0.3 mm and less than or equal to 0.5 mm; for example, it is 0.3 mm, 0.4 mm, or 0.5 mm.

[0053] It should be noted that the "strip-shaped hole" referred to in this application refers to a hole with a cross-section that is elongated, arc-shaped, or curved, etc.; it can also be understood that the ratio of the length to width of the hole is not less than 2. "Non-strip-shaped hole" refers to a hole with a length to width ratio less than 2; for example, a circular, elliptical, square, or diamond-shaped hole. The length of the hole refers to the maximum dimension of the hole; the width of the hole refers to the maximum dimension in a direction perpendicular to the length of the hole.

[0054] In one embodiment, the ratio of the total cross-sectional area of ​​all air passage holes 213 on the bottom wall 212 to the cross-sectional area of ​​the bottom wall 212 of the receiving tube 21 is 15%-60%. The cross-sectional area of ​​the bottom wall 212 does not include the cross-sectional area of ​​the first through-hole 214. This ratio affects the condensate absorption efficiency of the multiple air passage holes 213 on the bottom wall 212; a larger ratio results in a better condensate absorption efficiency. However, a ratio greater than 60% weakens the support strength of the bottom wall 212 of the receiving tube 21. A ratio less than 15% prevents the multiple air passage holes 213 from achieving the desired condensate absorption efficiency. Specifically, when suction is not being applied, the condensate cannot be absorbed by the air passage holes 213 through capillary action, forming a liquid film within the air passage holes 213 to block the air passage holes 213. During suction, the condensate within the air passage holes 213 is drawn back into the receiving tube 21.

[0055] Referring to Figure 5b and Figure 9 , Figure 9 is a simplified diagram of the aerosol-generating product housed in the housing tube. A retaining structure 217 is located within the housing tube 21 and is used to retain the aerosol-generating product 1 in its insertion direction, thereby ensuring a spacing between the aerosol-generating product 1 and the bottom wall 212. When the aerosol-generating product 1 is housed in the housing tube 21, the aerosol-generating product 1, the bottom wall 212, and a portion of the annular side wall 211 of the housing tube 21 form a condensation chamber 216. The condensation chamber 216 communicates with the air inlet passage 25 via the airway hole 213.

[0056] Specifically, when the aerosol-generating product 1 is housed in the containment tube 21, the entire outer surface of the aerosol-generating product 1 is in contact with the annular sidewall 211 of the containment tube 21. That is, there is virtually no gap between the sidewall of the aerosol-generating product 1 and the containment tube 21, preventing external air from entering the condensation chamber 216 from between the sidewall of the aerosol-generating product 1 and the containment tube 21. In this embodiment, the aerosol-generating product 1, the bottom wall 212 of the containment tube 21, and a portion of the annular sidewall 211 form a sealed condensation chamber 216. The condensation chamber 216 is connected to the air inlet passage 25 via the airway hole 213. This prevents aerosol from overflowing from other locations within the condensation chamber 216, which could cause condensate to remain adsorbed outside the containment tube 21 for an extended period and generate odor. Optionally, the side wall of the aerosol generating product 1 and the containing tube 21 can also be sealed by other means, such as providing a sealing ring at the entrance of the containing tube 21. After the aerosol generating product 1 is accommodated in the containing tube 21, there is no gap between the side wall of the aerosol generating product 1 and the containing tube 21, and external gas cannot enter the condensation chamber 216 from between the side wall of the aerosol generating product 1 and the containing tube 21.

[0057] The above-mentioned arrangement, by arranging a limiting structure 217 in the containing tube 21, opens a plurality of airway holes 213 on the bottom wall 212 of the containing tube 21, and makes the airway holes 213 capillary holes; in this way, when the containing tube 21 accommodates the aerosol generating product 1, the limiting structure 217 can be used to space the aerosol generating product 1 and the bottom wall 212 of the containing tube 21 to define a condensation chamber 216; the aerosol formed by the atomization of the aerosol generating product 1, its condensate can be stored in the condensation chamber 216, and part of the condensate in the condensation chamber 216 is adsorbed into the airway hole 213 under the capillary action of the airway hole 213, and the airway hole 213 is blocked, thereby effectively preventing the condensate in the condensation chamber 216 and the subsequently generated aerosol from overflowing from the containing tube 21, reducing the residual condensate outside the containing tube 21, and reducing the risk of generating odor. Moreover, during the suction process, the condensate in the airway hole 213 is re-sucked into the condensation chamber 216 under the action of the pressure difference and absorbed by the aerosol generating product 1. This cycle is repeated, which effectively reduces the formation of condensate inside and outside the receiving tube 21, and reduces the risk of odor caused by long-term adsorption of condensate inside and outside the receiving tube 21; at the same time, it improves the effective utilization rate of the aerosol.

[0058] In one embodiment, a retaining structure 217 is disposed on the bottom wall 212 of the containment tube 21 and extends along the periphery of the bottom wall 212. The retaining structure 217 can be a closed-loop raised ring 215. Specifically, the raised ring 215 is positioned in contact with the annular sidewall 211 at every position along its circumference. The aerosol-generating article 1 cooperates with the bottom wall 212 of the containment tube 21 and the side surface of the raised ring 215 facing away from the annular sidewall 211 to form a sealed condensation chamber 216.

[0059] Of course, in other specific embodiments, the limiting structure 217 may also be a plurality of protrusions spaced apart on the bottom wall 212, each protrusion having the same height along the depth direction of the containment tube 21. In this case, the aerosol-generating article 1 cooperates with the bottom wall 212 of the containment tube 21, the outer wall surfaces of the plurality of protrusions, and a portion of the annular side wall 211 to form a sealed condensation chamber 216. Alternatively, the limiting structure 217 may be disposed on the side wall of the containment tube 21, and may be a closed-loop protrusion 215 or a plurality of protrusions spaced apart along the circumference of the side wall of the containment tube 21.

[0060] In one embodiment, referring to FIG9 , a distance H between a surface of the retaining structure 217 facing away from the bottom wall 212 and the bottom wall 212 of the receiving tube 21 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm. For example, H can be 0.1 mm, 0.3 mm, 0.5 mm, etc. If H is less than 0.1 mm, the volume of the condensation chamber 216 is too small to effectively deposit condensate. If H is greater than 0.5 mm, excessive condensate will be deposited.

[0061] The width W of the limiting structure 217 is greater than or equal to 0.2 mm and less than or equal to 0.5 mm; for example, W can be 0.2 mm, 0.3 mm, 0.5 mm, etc. If W is less than 0.1 mm, the limiting structure 217 cannot effectively support the aerosol-generating article 1. If W is greater than 0.5 mm, the supporting surface of the limiting structure 217 is too large, reducing the corresponding air intake area of ​​the accommodating tube 21, increasing the draw resistance, and affecting the puffing experience.

[0062] In one embodiment, in conjunction with Figures 4, 10, and 11, Figure 10 is a schematic diagram of the overall structure of an airway cover provided in one embodiment of the present application; Figure 11 is a cross-sectional view taken along the BB axis of the airway cover shown in Figure 10. The aerosol generating device 2 also includes an airway cover 27. The airway cover 27 is disposed between the bottom wall 212 of the receiving tube 21 and the bottom wall 212 of the mounting groove 24. The airway cover 27 has a second through-hole 271, which corresponds to the first through-hole 214 in the bottom wall 212 of the receiving tube 21. The heater 26 sequentially passes through the second through-hole 271 and the first through-hole 214 to enter the receiving tube 21. Specifically, the heater 26 contacts the wall of the second through-hole 271. In this way, the heat from the heater 26 can be transferred to the airway cover 27, forming a localized high temperature on the airway cover 27, thereby reducing the formation of condensate in the condensation chamber 216.

[0063] Specifically, as shown in Figure 11, the airway cover 27 includes a main body 272, a first annular protrusion 273, and / or a second annular protrusion 274. The second through-hole 271 is formed in the center of the main body 272. The first annular protrusion 273 is provided on a side surface of the main body 272 facing the bottom wall 212 of the container tube 21 and surrounds the second through-hole 271. The side surface of the first annular protrusion 273 facing the second through-hole 271 is flush with the inner wall surface of the second through-hole 271. The first annular protrusion 273 surrounds and contacts the heater 26. The second annular protrusion 274 is formed on a side surface of the airway cover 27 facing away from the bottom wall 212 of the container tube 21 and surrounds the second through-hole 271. The side surface of the second annular protrusion 274 facing the second through-hole 271 is flush with the inner wall surface of the second through-hole 271. The second annular protrusion 274 surrounds and contacts the heater 26.

[0064] As described above, by adding the first annular protrusion 273 and the second annular protrusion 274 that contact the heating element on the airway cover 27, the contact area between the airway cover 27 and the heating element can be increased, thereby increasing the heat conduction between the heating element and the airway cover 27, so that more heat can be conducted to the airway cover 27, thereby further reducing the generation of condensation.

[0065] In a specific embodiment, referring to FIG4 , the bottom wall 212 of the receiving tube 21 abuts the first annular protrusion 273 and is spaced apart from the main body 272 of the airway cover 27. This allows heat from the airway cover 27 to be further transferred to the bottom wall 212 of the receiving tube 21 through the first annular protrusion 273, thereby reducing the formation of condensate in the condensation chamber 216.

[0066] In one embodiment, as shown in Figure 12, Figure 12 is an enlarged view of another embodiment of the present application at Q in Figure 2. In this embodiment, the distance H1 between the surface of the bottom wall 212 of the accommodating tube 21 facing the airway cover 27 and the surface of the airway cover 27 facing the bottom wall 212 of the accommodating tube 21 is greater than or equal to 0.2 mm and less than or equal to 0.4 mm, for example, it can be 0.2 mm, 0.3 mm, 0.4 mm, etc. Specifically, the surface of the airway cover 27 facing the bottom wall 212 of the accommodating tube 21 and the outer surface of the bottom wall 212 of the accommodating tube 21 are both planes, that is, the surface of the airway cover 27 facing the bottom wall 212 of the accommodating tube 21 and the outer surface of the bottom wall 212 of the accommodating tube 21 do not have any protruding structures. Preferably, the surface of the airway cover 27 facing the bottom wall 212 of the accommodating tube 21 is arranged parallel to the outer surface of the bottom wall 212 of the accommodating tube 21.

[0067] The benefit of the above arrangement is that, although the airway holes 213 in the bottom wall 212 of the receiving tube 21 can absorb some condensate, a small amount of condensate will inevitably seep downward from the airway holes 213 into the gap between the receiving tube 21 and the airway cover 27. If the gap between the receiving tube 21 and the airway cover 27 is small, for example, H1 is greater than or equal to 0.2 mm and less than or equal to 0.4 mm, when external air flows through the gap, the negative pressure generated by the airflow can, according to the principle of air pressure, entrain the condensate deposited in the gap and flow upward, then enter the receiving tube 21 through the airway holes 213 and accumulate in the condensation chamber 216. The accumulated condensate is then absorbed by the aerosol generating matrix 131. Therefore, the gap H1 between the surface of the bottom wall 212 of the receiving tube 21 facing the airway cover 27 and the surface of the airway cover 27 facing the bottom wall 212 of the receiving tube 21 cannot be too large. If the gap between the receiving tube 21 and the airway cover 27 is too large, for example, if H1 is greater than 0.4 mm, the outside air flowing through the gap will not be able to completely entrain the condensate deposited in the gap into the receiving tube 21, and some condensate will still be deposited in the gap between the airway cover 27 and the receiving tube 21. Furthermore, the gap H1 between the surface of the bottom wall 212 of the receiving tube 21 facing the airway cover 27 and the surface of the airway cover 27 facing the bottom wall 212 of the receiving tube 21 cannot be too small. If it is less than 0.2 mm, the bottom wall 212 of the receiving tube 21 will not allow sufficient air to enter, resulting in increased suction resistance.

[0068] Specifically, when the aerosol-generating product 1 is housed in the containing tube 21, a circumferential sealing structure is formed at least at one location between the inner wall of the containing tube 21 and the outer wall of the aerosol-generating product 1. That is, the gap between the inner wall of the containing tube 21 and the outer wall of the aerosol-generating product 1 is sealed along the circumference of the outer wall of the aerosol-generating product 1. For example, in one embodiment, the entire outer surface of the aerosol-generating product 1 is in contact with the annular sidewall 211 of the containing tube 21. That is, there is virtually no gap between the sidewall of the aerosol-generating product 1 and the containing tube 21. Therefore, external gas cannot enter the condensation chamber 216 from between the sidewall of the aerosol-generating product 1 and the containing tube 21. This prevents a reduction in the airflow through the gap between the containing tube 21 and the airway cover 27, thereby weakening the entrainment of condensate in the gap and preventing the condensate from being deposited between the airway cover 27 and the containing tube 21. In other embodiments, the inner diameter of the containing tube 21 can also be set to gradually decrease from top to bottom; the inner diameter of the top of the containing tube 21 is larger than the outer diameter of the aerosol generating product 1 to facilitate insertion; the inner diameter of the bottom of the containing tube 21 is equal to the outer diameter of the aerosol generating product 1, so that the inner surface of the bottom of the containing tube 21 fits tightly with the outer surface of the aerosol generating product 1.

[0069] The side wall of the aerosol generating product 1 and the containing tube 21 can also be sealed by other means. Optionally, a sealing ring (not shown) is provided at the entrance of the containing tube 21. After the aerosol generating product 1 is contained in the containing tube 21, there is no gap between the side wall of the aerosol generating product 1 and the containing tube 21. External gas cannot enter the condensation chamber 216 from between the side wall of the aerosol generating product 1 and the containing tube 21, thereby avoiding the reduction of the airflow flowing through the gap between the containing tube 21 and the airway cover 27, weakening the entrainment effect on the condensate in the gap, and thus preventing the condensate from being deposited between the airway cover 27 and the containing tube 21. Optionally, referring to FIG12 , a sealing ring is provided at the bottom of the inner wall surface of the containing tube 21. The sealing ring can be a silicone ring bonded to the inner wall surface of the containing tube 21, or a third annular protrusion 218 on the inner wall surface of the containing tube 21.

[0070] In one embodiment, as shown in FIG12 , a third annular protrusion 218 is formed along the radial direction of the housing tube 21 at the junction between the surface of the bottom wall 212 of the housing tube 21, distal from the airway cover 27, and the inner surface of the side wall of the housing tube 21. This ensures that when the aerosol-generating product 1 is housed in the housing tube 21, there is virtually no gap between the side wall of the aerosol-generating product 1 and the third annular protrusion 218 of the housing tube 21. This prevents external air from entering the condensation chamber 216 from between the side wall of the aerosol-generating product 1 and the housing tube 21, thereby preventing the normal airflow path from being reduced. It should be noted that the normal airflow path is for external air to enter through the air inlet passage 25, then pass through the gap between the housing tube 21 and the airway cover 27, and enter the bottom of the aerosol-generating product 1 through the airway holes 213. In this manner, the airflow can entrain some of the condensate deposited in the gap between the housing tube 21 and the airway cover 27 and enter the housing tube 21, thereby preventing the condensate from being deposited on the airway cover 27. If there is a gap between the inner wall of the containment tube 21 and the outer wall of the aerosol-generating article 1, some external airflow will enter through the gap between the containment tube 21 and the aerosol-generating article 1, and then enter the interior of the aerosol-generating article 1 through the gap between the bottom wall 212 of the containment tube 21 and the bottom of the aerosol-generating article 1. This reduces the airflow flowing through the gap between the containment tube 21 and the airway cover 27, weakening the entrainment of condensate within the gap. Thus, by providing a tight fit between at least one point between the inner wall of the containment tube 21 and the outer wall of the aerosol-generating article 1, it is possible to ensure that all external airflow enters through the gap between the containment tube 21 and the airway cover 27, promptly removing any condensate deposited within the gap and preventing it from accumulating between the airway cover 27 and the containment tube 21. Furthermore, a third annular protrusion 218 is formed along the radial direction of the containment tube 21 at the junction between the surface of the bottom wall 212 of the containment tube 21, facing away from the airway cover 27, and the inner surface of the sidewall of the containment tube 21, facilitating process implementation.

[0071] The thermal conductivity of the airway cover 27 is greater than that of the bracket 23. This reduces the amount of heat transferred from the airway cover 27 to the bracket 23, improves heat utilization, and reduces the risk of burns from the aerosol generating device 2. Specifically, the airway cover 27 can be made of metal or ceramic, while the bracket 23 can be made of plastic.

[0072] The working principle of the aerosol generating system corresponding to the receiving tube 21 is as follows:

[0073] The aerosol-generating article 1 is inserted into the housing tube 21. During the heating process, the housing tube 21 and the airway cover 27 first form a localized high-temperature area. The heating element heats the drawn airflow, initially reducing the formation of condensate within the housing tube 21. Subsequently, the aerosol formed by the atomization of the aerosol-generating substrate 131 gradually forms condensate within the condensation chamber 216. This condensate is adsorbed by the airway holes 213 through capillary action, blocking the airway holes 213 with the condensate. Consequently, any subsequently formed aerosol will not overflow the condensation chamber 216, or only a very small amount will overflow the condensation chamber 216, effectively reducing the risk of condensate forming within the air inlet passage 25. During the suction process, the condensate in the airway hole 213 is drawn back into the receiving tube 21 by the negative pressure generated by the suction and accumulates in the condensation chamber 216. The accumulated condensate is absorbed by the aerosol generating matrix 131. This cycle is repeated, effectively avoiding the formation of condensate inside and outside the receiving tube 21, and reducing the risk of condensate being adsorbed on the inner and outer walls of the receiving tube 21 for a long time, thereby generating odor.

[0074] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A container tube for containing at least part of an aerosol generating product, the container tube comprising: annular side wall; A bottom wall connected to the annular side wall and having a plurality of airway holes, wherein the airway holes are capillary holes; The limiting structure is located in the containing tube and is used to limit the aerosol generating product along the insertion direction of the aerosol generating product so that the aerosol generating product is spaced apart from the bottom wall.

2. The housing tube according to claim 1, wherein: A distance between a side surface of the limiting structure facing away from the bottom wall and the bottom wall is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

3. The housing tube according to claim 1, wherein: The width of the limiting structure is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

4. The housing tube according to any one of claims 1 to 3, wherein: The limiting structure is a convex ring which is arranged on the bottom wall and extends along the periphery of the bottom wall.

5. The housing tube according to claim 1, wherein: The airway hole is a non-strip hole, and the diameter of the non-strip hole is greater than or equal to 0.1 mm and less than or equal to 0.8 mm; or The airway hole is a strip hole, and the width of the strip hole is greater than or equal to 0.1 mm and less than or equal to 0.8 mm.

6. The housing tube according to claim 1, wherein: The bottom wall also has a first through hole for the heating body to pass through, and a plurality of the airway holes are distributed in a circumferential direction around the first through hole.

7. The housing tube according to claim 6, wherein: The ratio of the total cross-sectional area of ​​all the airway holes to the cross-sectional area of ​​the bottom wall is 15%-60%; wherein the cross-sectional area of ​​the bottom wall does not include the cross-sectional area of ​​the first through hole.

8. An aerosol generating device, wherein: include: Shell assembly; A bracket, disposed in the housing assembly, having a mounting slot; A receiving tube is arranged in the installation groove and cooperates with the groove wall of the installation groove to form an air intake passage; a heating assembly, disposed in the housing assembly, for heating the aerosol generating product; Wherein, the housing tube is the housing tube as described in any one of claims 1-7.

9. The aerosol generating device according to claim 8, wherein: The aerosol generating device further comprises: An airway cover is arranged between the bottom wall of the receiving tube and the bottom wall of the mounting groove; the airway cover has a second through hole arranged corresponding to the first through hole of the receiving tube; Wherein, the heating component is arranged at the bottom of the installation groove, and the heating component includes a heating body; the heating body passes through the second through hole and the first through hole into the containing tube; the heating body contacts the hole wall of the second through hole.

10. The aerosol generating device according to claim 9, wherein: The surface of the airway cover facing the bottom wall of the accommodating tube has a first annular protrusion surrounding the second through hole; the first annular protrusion surrounds the heating body and contacts the heating body; the bottom wall of the accommodating tube is supported by the first annular protrusion and is spaced apart from the airway cover; and / or The surface of the airway cover facing away from the bottom wall of the accommodating tube has a second annular protrusion surrounding the second through hole; the second annular protrusion surrounds the heating body and contacts the heating body.

11. The aerosol generating device according to claim 9, wherein: A distance between a surface of the bottom wall of the accommodating tube facing the airway cover and a surface of the airway cover facing the bottom wall of the accommodating tube is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

12. The aerosol generating device according to claim 11, wherein: The surface of the airway cover facing the bottom wall of the accommodation tube and the outer surface of the bottom wall of the accommodation tube are both planes.

13. The aerosol generating device according to claim 9, wherein: The thermal conductivity of the airway cover is greater than the thermal conductivity of the bracket.

14. An aerosol generating system, wherein: include: An aerosol generating device as claimed in any one of claims 8 to 13; an aerosol generating product, at least partially inserted into the containing tube and abutting against a side surface of the limiting structure of the containing tube away from the bottom wall; A circumferential sealing structure is formed at least at one location between the inner wall surface of the containing tube and the outer wall surface of the aerosol generating article; The aerosol generating product, the bottom wall of the containing tube and part of the annular side wall form a closed condensation chamber, and the condensation chamber is connected with the air inlet channel through the airway hole.

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