CN111972712B

CN111972712B - Aerosol Generating Device

Info

Publication number: CN111972712B
Application number: CN202010645069.5A
Authority: CN
Inventors: 袁永宝; 廖焱程
Original assignee: Shenzhen Maishi Technology Co Ltd
Current assignee: Shenzhen Maishi Technology Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2024-08-27
Anticipated expiration: 2040-07-07
Also published as: CN111972712A; EP4179901A1; WO2022007410A1; KR102910985B1; KR20230038147A; KR20260008169A; JP2023533282A; JP7577186B2; EP4179901A4

Abstract

The invention relates to an aerosol generating device, comprising a fixing tube for fixing an aerosol forming substrate and a heating assembly; the fixed pipe is of a hollow structure, and one end of the fixed pipe is provided with a first opening for inserting an aerosol forming matrix; the heating assembly is inserted into the aerosol-forming substrate from an end of the stationary tube remote from the first opening; the aerosol generating device further comprises an airflow channel which is arranged on the inner side of the pipe wall of the fixed pipe and used for allowing external air to enter the aerosol forming substrate. The aerosol generating device has the advantages of simple structure, high airflow transmission efficiency, difficult blockage and good user experience.

Description

Aerosol generating device

Technical Field

The present invention relates to a heating non-combustion atomizing device, and more particularly to an aerosol generating device.

Background

The existing aerosol generating device comprises a fixed tube for accommodating an aerosol-forming substrate and a lower housing for accommodating a battery. The heating element is arranged in the fixed pipe, and the battery is used for supplying power to the heating element. The lower shell is provided with an air inlet and an air passage communicated with the air inlet and the fixed pipe, when the aerosol forming matrix heats and a user sucks smoke, external air enters the air passage from the air inlet and then enters the fixed pipe, and the smoke is conveyed into the mouth of the user through the inside of the aerosol forming matrix. On the other hand, the air passage is arranged on the lower shell, so that the structure is complex, the path is long, and the blocking phenomenon is easy to occur.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an improved aerosol generating device.

The technical scheme adopted for solving the technical problems is as follows: constructing an aerosol-generating device comprising a securing tube for securing an aerosol-forming substrate, and a heating assembly;

the fixed pipe is of a hollow structure, and one end of the fixed pipe is provided with a first opening for inserting an aerosol forming matrix;

One end of the outer sleeve is provided with a supporting wall for supporting the aerosol forming substrate, and the supporting wall is arranged opposite to the second opening;

The heating component is inserted into the aerosol-forming substrate from an end of the stationary tube remote from the first opening;

The aerosol generating device further comprises an airflow channel which is arranged on the inner side of the pipe wall of the fixed pipe and on the supporting wall and used for external air to enter the aerosol forming substrate.

Preferably, the air flow channel comprises a first air flow channel which is arranged on the inner side of the pipe wall of the fixed pipe, is communicated with the first opening and extends towards one end far away from the first opening, and is used for external air to enter the aerosol-forming substrate.

Preferably, the aerosol generating device further comprises an outer sleeve sleeved on the periphery of the fixed tube;

The gas flow channel further comprises a second gas flow channel which is arranged in the outer sleeve and communicated with the first gas flow channel for the gas of the first gas flow channel to enter the aerosol-forming substrate.

Preferably, the other end of the fixed tube is provided with a second opening communicated with the first opening;

One end of the outer sleeve is provided with a supporting wall for supporting the aerosol forming substrate; the supporting wall is arranged opposite to the second opening; the heating assembly passing through the support wall and being inserted into the aerosol-forming substrate from the second opening;

The second airflow channel is arranged on the supporting wall and is communicated with the first airflow channel and the second opening.

Preferably, the first air flow passage is provided along a longitudinal direction of the stationary pipe;

and/or, a bottom wall is arranged at one end of the fixed tube far away from the first opening.

Preferably, the cross section of the fixing tube is non-circular;

the first air flow channel is formed by sinking part of the pipe wall of the fixed pipe.

Preferably, the fixing tube comprises a hollow fixing part with two ends penetrating; the first opening and the second opening are arranged at two ends of the fixing part;

the cross section of the fixing part is elliptical, and the size of the fixing part is matched with the size of the cross section of the aerosol forming substrate;

the cross section of the fixing part comprises a long shaft and a short shaft which is arranged to cross the long shaft;

the two ends of the long shaft are both provided with the first airflow channel.

Preferably, the fixed pipe comprises a circular inner pipe wall and an outer pipe wall arranged at the periphery of the inner pipe wall and spaced from the inner pipe wall;

The first air flow channel is disposed inside the outer tube wall and between the outer tube wall and the inner tube wall.

Preferably, the inner pipe wall comprises a plurality of inner pipe wall units which are arranged at intervals and are surrounded to form a columnar structure;

The interval between two adjacent inner tube wall units forms a slot which is communicated with the first air flow channel and can enable the two adjacent inner tube wall units to generate extrusion force on the aerosol-forming substrate;

The slot is disposed in communication with the first opening and the second opening.

Preferably, the fixing tube further comprises a connecting part arranged on the inner tube wall and used for connecting the inner tube wall and the outer tube wall.

Preferably, the inner tube wall and the outer tube wall are integrally formed;

or the inner tube wall and the outer tube wall are detachably connected.

Preferably, the device further comprises an upper cover sleeved on the periphery of the fixed pipe; the inner pipe wall and the upper cover are integrally formed.

Preferably, a plurality of bosses are arranged on the supporting wall at intervals; and the second air flow channel communicated with the first air flow channel is formed between two adjacent bosses.

Preferably, the supporting wall is provided with a through hole for the heating component to pass through.

Preferably, the heating assembly comprises a heating body insertable into the aerosol-forming substrate from the support wall through the second opening.

Preferably, the cross section of the fixing part of the fixing tube includes a long axis and a short axis intersecting with the long axis; a first airflow channel of the airflow channel is arranged at both end parts of the long shaft;

The heating element is sheet-shaped, and when the heating element is inserted into the aerosol-forming substrate, the width direction of the heating element coincides with the length direction of the short axis.

Preferably, the heating element is columnar.

Preferably, the heating element comprises a cylindrical body and a conical tip structure arranged at one end of the body.

Preferably, the device further comprises an upper cover sleeved on the periphery of the fixed pipe; the upper cover is provided with a socket which is arranged corresponding to the first opening and used for inserting the aerosol forming substrate into the fixed pipe.

Preferably, the shape of the socket is adapted to the cross-sectional shape of the stationary tube.

Preferably, a guiding inclined plane for guiding the insertion of the aerosol-forming substrate is arranged on the socket;

The guide inclined surface extends from an end surface of the insertion opening, which is far away from one end of the fixed pipe, towards the direction of the fixed pipe.

The aerosol generating device has the following beneficial effects: according to the aerosol generating device, the air flow channel is arranged on the inner side of the pipe wall of the fixed pipe, so that external air can enter the aerosol forming substrate, the air flow channel can be conveniently sucked by a user, the air flow channel can be shortened, the blockage of the air flow channel is avoided, the direct transfer of heat to the pipe wall can be avoided, and the situation that the user cannot hold or feel uncomfortable during suction can be avoided. The aerosol generating device has the advantages of simple structure, high airflow transmission efficiency, difficult blockage and good user experience.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic structural view of a first embodiment of an aerosol-generating device according to the invention;

Fig. 2 is a longitudinal sectional view of the aerosol-generating device of the present invention shown in fig. 1;

FIG. 3 is an enlarged schematic view of a part of the structure of the aerosol-generating device of the present invention shown in FIG. 2;

FIG. 4 is an exploded schematic view of the aerosol-generating device of the present invention shown in FIG. 1;

FIG. 5 is a schematic view showing the structure in which the upper cap of the aerosol-generating device of the present invention shown in FIG. 1 is fitted to the stationary tube;

Fig. 6 is a schematic view showing the structure of an upper cover of the aerosol-generating device of the present invention shown in fig. 4;

FIG. 7 is a schematic view showing the structure of a fixing tube of the aerosol-generating device of the present invention shown in FIG. 4;

FIG. 8 is a schematic view of the outer sleeve of the aerosol-generating device of the present invention illustrated in FIG. 4;

FIG. 9 is a schematic view showing a state in which a heating member and a power supply member of the aerosol-generating device of the present invention shown in FIG. 4 are engaged;

FIG. 10 is a schematic view showing the structure of the upper cover and the fixed tube in cooperation with each other in the second embodiment of the aerosol generating device according to the present invention;

FIG. 11 is an exploded view of the stationary tube of the second embodiment of the aerosol-generating device of FIG. 10;

FIG. 12 is a schematic view showing the state of the cooperation of the heating assembly and the power supply assembly in the second embodiment of the aerosol generating device shown in FIG. 10;

Fig. 13 shows a partial cross-sectional view of a stationary tube in a third embodiment of an aerosol-generating device according to the invention.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.

It is to be understood that the terms "front", "back", "left", "right", "upper", "lower", "first", "second", etc. are merely for convenience in describing the embodiments of the present invention, and do not denote that the referenced devices or elements must be specially differentiated, and thus should not be construed as limiting the present invention. It should be noted that 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. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Fig. 1 and 2 show a first embodiment of the aerosol-generating device of the present invention. The aerosol-generating device 100 may heat the aerosol-forming substrate 200 by low temperature heating without burning, in this embodiment, the aerosol-forming substrate 200 may have a cylindrical shape, and in particular, the aerosol-forming substrate 200 may be a cigarette.

As shown in fig. 1 to 3, the aerosol generating device includes an upper cover 10, a fixing tube 20, and a heating assembly 50. The upper cover 10 is sleeved on the outer periphery of the fixed tube 20, and can form an upper cover assembly with the fixed tube 20 to accommodate the aerosol-forming substrate 200. The fixing tube 20 is provided in the upper cover 10, and is inserted into the aerosol-forming substrate 200 to fix the aerosol-forming substrate 200. The heating assembly 50 is for insertion into the aerosol-forming substrate 200 of the mounting tube 20 and for heating the aerosol-forming substrate 200. As shown in fig. 3 to 6, further, in the present embodiment, the upper cover 10 may be detachably connected to the fixed tube 20 and connected to form an integral structure by providing a connection assembly, however, it will be understood that in other embodiments, the upper cover 10 and the fixed tube 20 may be integrally formed by casting or injection molding. The upper cover 10 includes a top wall 11 and a cylindrical side wall 12 disposed on the top wall 11 and extending downward along the circumference of the top wall 11; the inner side of the cylindrical side wall 12 can be enclosed to form a containing cavity. The top wall 11 may be generally, but not limited to, elliptical in cross-section. A socket 111 may be provided on the upper cover 10, and the socket 111 may be used for inserting the aerosol-forming substrate 200 into the fixing tube 20. Specifically, the socket 111 may be disposed on the top wall 11 of the upper cover 10. In this embodiment, the shape of the socket 111 may be adapted to the cross-sectional shape of the stationary tube 20. Specifically, the shape of the socket 111 may be adapted to the cross-sectional shape of the fixing portion 21 of the fixing tube 20. The socket 111 is generally, but not limited to, elliptical, and a guiding slope is provided on the socket 111, and the guiding slope may be extended from an end surface of the socket 111 away from one end of the fixing tube 20 toward the fixing tube 20, so that the socket 111 may be generally horn-shaped, and the guiding slope may be used for guiding the insertion of the aerosol-forming substrate 200. It will be appreciated that in other embodiments, the guide ramp may be omitted.

As shown in fig. 3 to 5 and 7, in the present embodiment, the fixing tube 20 is hollow and has a through structure at both ends for penetrating the aerosol-forming substrate 200. Further, in the present embodiment, the fixing tube 20 includes a fixing portion 21 and a mounting portion 22. The fixing portion 21 is used for fixing the aerosol-forming substrate 200, and the mounting portion 22 is disposed at one end of the fixing portion 21 and is capable of being mounted in cooperation with the upper cover 10.

In this embodiment, the fixing portion 21 is tubular, is hollow, has two ends penetrating through, and has a plugging channel 210 formed inside. The fixed tube 20 is provided with a first opening 211 and a second opening 212 at both ends thereof, respectively; specifically, in some embodiments, the first opening 211 and the second opening 212 are respectively disposed at two ends of the fixing portion 21 and are disposed symmetrically along the axial direction and are in communication with the plugging channel 210, and the aerosol-forming substrate 200 may be inserted into the fixing tube from the first opening 211 and withdrawn from the fixing tube 20 toward the first opening 211, specifically, the aerosol-forming substrate 200 may be inserted into the second opening 212 and may also be withdrawn from the second opening 212 toward the first opening 211. In other embodiments, the length of the aerosol-forming substrate 200 is greater than the distance between the first opening 211 and the second opening 212, and the aerosol-forming substrate 200 may be disposed beyond the second opening 212. In other embodiments, the aerosol-forming substrate 200 may not reach the second opening. Specifically, in some embodiments, the first opening 211 may be a flare, and the radial dimension of the first opening 211 may be gradually reduced toward the second opening 212, so as to facilitate insertion of the aerosol-forming substrate 200. Of course, it will be appreciated that in other embodiments, a bottom wall may be disposed at an end of the fixing portion 21 remote from the first opening 211.

Further, in the present embodiment, the cross section of the fixing tube 20 may be non-circular, and in particular, the cross section of the fixing tube 20 is, but not limited to, elliptical. In particular, the cross-section of the securing portion 21 may be generally, but not limited to, elliptical, and in other embodiments, the cross-section of the securing tube 20 may be circular or non-circular. The cross-sectional dimension of the fixing portion 21 is adapted to the cross-sectional dimension of the aerosol-forming substrate 200, and in particular, the cross-section of the fixing portion 21 may include a major axis and a minor axis disposed to intersect the major axis. The length of the long axis may be greater than the radial dimension of the aerosol-forming substrate 200, and the short axis may be comparable to the radial dimension of the aerosol-forming substrate 200, such that most of the outer surface of the side surface of the aerosol-forming substrate 200 is in surface contact with the inner surface of the plugging channel 210, thereby avoiding deformation of the aerosol-forming substrate 200 caused by the fixing tube 20 pressing the aerosol-forming substrate 200.

Further, in the present embodiment, the mounting portion 22 is disposed at the first opening 211 of the fixing portion 21, and the cross section thereof may be elliptical, and the cross section shape and size thereof may be adapted to the cross section shape and size of the inner side of the upper cover 10. The mounting portion 22 is provided with a cavity 221 having an opening therein. The top surface of the cavity 221 is provided with an opening, and the opening can be communicated with the socket 111 on the upper cover 10 and is communicated with the plugging channel 210 of the fixing part 21 through the first opening 211. In some embodiments, the mounting portion 22 may be integrally formed with the fixing portion 21 by casting or injection molding.

Further, in the present embodiment, the mounting portion 22 is detachably connected to the upper cover 10 by providing a connection structure. Of course, it will be appreciated that in other embodiments, the mounting portion 22 may be integrally formed with the cover 10. In some embodiments, the connection structure includes a catch 222 and a card slot 121. The plurality of snaps 222 may be disposed on the sidewall 122 of the mounting portion 22, and in particular, in some embodiments, the plurality of snaps 222 may be disposed at intervals along the circumference of the sidewall 122. The clamping groove 121 is disposed at the inner side of the upper cover 10 and near the top wall of the upper cover 10, and may be plural, and is disposed corresponding to the buckle 222 and can be clamped with the buckle 222. In the mounting process, the upper cover 10 can be sleeved on the periphery of the fixing portion 21 along the mounting portion 22, and the buckles 222 of the mounting portion 22 are correspondingly clamped in the clamping grooves 121. By this connection structure, the fixing tube 20 can be carried out together while the upper cover 10 is slid.

As shown in fig. 3 to 5 and 8, in the present embodiment, the aerosol generating device further includes an outer sleeve 30, wherein the outer sleeve 30 is disposed in the upper cover 10 and sleeved on the outer periphery of the fixed tube 20, for heat insulation to prevent the upper cover from being directly transferred to the upper cover, such that the upper cover cannot be held or has discomfort caused by the excessive temperature, and can cooperate with the fixed tube 20 to form an airflow channel. It will be appreciated that in other embodiments, the outer sleeve 30 may be omitted.

In this embodiment, the outer sleeve 30 is sleeved on the outer periphery of the fixing portion 21, so that on one hand, the outer sleeve can perform a heat insulation function during heating, and on the other hand, the outer sleeve can be used for accommodating residues of the heated aerosol-forming substrate 200, and when cleaning the residues, the upper cover 10 can be slid while the fixing tube 20 is pulled out from the outer sleeve 30, and then the residues of the outer sleeve 30 can be poured out.

The outer sleeve 30 includes a tubular body 31, and the tubular body 31 is sleeved on the periphery of the fixing portion 21. The inner side of the tubular main body 31 is cylindrical, and the cross-sectional shape and size of the outer sleeve 30 can be adapted to the cross-sectional shape and size of the fixing portion 21. Specifically, in the present embodiment, the cross-section of the outer sleeve 30 may be generally elliptical. One end of the outer sleeve 30 may be provided with a support wall 311. Specifically, in some embodiments, the support wall 311 is disposed at one end of the tubular body 31 opposite the second opening 212, which can be used to support the aerosol-forming substrate 200. The support wall 311 is further provided with a through hole 3111, and the cross-sectional shape of the through hole 3111 can be adapted to the cross-sectional shape of the heating element 51 of the heating element 50, and in some embodiments, the through hole 3111 is circular and can be used for the heating element 50 to penetrate into the fixing tube 20, so as to facilitate the heating element 51 of the heating element 50 to be inserted into the aerosol-forming substrate 200. In some embodiments, the cross-sectional dimension of the through-hole 3111 is smaller than the cross-sectional dimension of the second opening 212, so that the aerosol-forming substrate 200 is prevented from passing out of the outer sleeve 30. In this embodiment, a plurality of bosses 312 may be disposed on the supporting wall 311, and the plurality of bosses 312 may be disposed at intervals. The plurality of bosses 312 may be used to support the aerosol-forming substrate 200. In this embodiment, the plurality of bosses 312 may be integrally formed with the supporting wall 311 by injection molding or casting. In some embodiments, the outer sleeve 30 further includes a first extension portion 32 disposed on one side of the tubular body 31 and protruding outward, and a second extension portion 33 disposed on one end of the tubular body 31 and protruding outward. The first extension portion 32 and the second extension portion 33 can be slidably engaged with the heating element 50, so as to detachably connect the entire outer sleeve 30 with the heating element 50.

As shown in fig. 2, 3, 5, 7 and 8, in the present embodiment, the air flow channel is disposed inside the wall of the fixed tube 20 and on the supporting wall 311, and is in communication with the first opening 211 and the second opening 212. The gas flow channel may be used for external gas to enter the aerosol-forming substrate 200. By providing the air flow channel on the inner wall of the fixed tube 20 and the supporting wall 311, the air flow transmission path can be shortened, the air flow transmission efficiency can be improved, the blocking phenomenon can be reduced, the direct transfer of heat to the tube wall can be avoided, and the situation that a user cannot hold or feel uncomfortable during suction can be avoided.

In the present embodiment, the air flow channels include a first air flow channel 213 and a second air flow channel 3112. The first air flow channel 213 is disposed inside the wall of the fixed tube 20 and is in communication with the first opening 211, and can extend along the longitudinal direction of the fixed tube 20 away from one end of the first opening 211, i.e. the second opening 212. Specifically, the first air flow channels 213 are disposed at two ends of the long shaft, which may be formed by a portion of the wall recess of the fixing tube 20, and in this embodiment, the first air flow channels 213 may be formed by a portion of the wall recess of the fixing portion 21 disposed corresponding to the two ends of the long shaft. The second air channel 3112 may be disposed on the support wall 311 and communicate with the first air channel 213 and the second opening 212. In the present embodiment, in particular, the second air flow passage 3112 may be formed by a space between two bosses 312 disposed adjacently. When the user sucks, external air may enter the fixing tube 20 through the insertion opening 111 of the upper cover 10 and reach the second air flow channel 3112 through the first air flow channel 213, and then enter the aerosol-forming substrate 200 from the second air flow channel 3112 to take out the atomized air formed by heating of the aerosol-forming substrate 200.

As further shown in fig. 1 to 4, in the present embodiment, the aerosol generating device further includes a protective cover 40. The protective cover 40 is slidably disposed on the upper cover 10, and can block the insertion opening 111 by sliding when the aerosol-forming substrate 200 is inserted into the fixing tube 20, so as to prevent dust from entering the fixing tube 20. In some embodiments, the protective cover 40 includes a cover 41, and the cover 41 can be disposed on the top wall 11 of the upper cover 10 and can slide back and forth toward the socket 111. The upper cover 10 is provided with a guide hole 112, the guide hole 112 is communicated with the socket 111, the guide hole 112 can be a bar-shaped hole, the cover 41 is provided with a connecting column 411, and the connecting column 411 can be inserted into the upper cover 10 from the guide hole 112. A slider 42 may be disposed in the cavity 221 of the mounting portion 22, the slider 42 may be slidably disposed toward the socket 111, and the connection post 411 may be connected to the slider 42 to drive the slider 42 to slide. An elastic member 43 may be provided between the slider 42 and the side wall of the mounting portion 22. The elastic member 43 may generate elastic force to facilitate the sliding and restoring of the slider 42.

As shown in fig. 2 to 4 and 9, the heating unit 50 includes a heating body 51. The heating body 51 may pass through the support wall 311 and be inserted into the aerosol-forming substrate 200 from the second opening 212. In the present embodiment, the heating element 51 may have a sheet shape, and when the heating element 51 is inserted into the aerosol-forming substrate 200, the width direction of the heating element 51 may coincide with the length direction of the short axis. The thickness direction of the heating element 51 may be parallel to the long axis direction of the fixing portion 21, so that the first air flow channel 213 may be located at two opposite sides of the heating element 51, and further, when the aerosol-forming substrate 200 is heated, the air flow may flow to two sides of the heating element 51 uniformly, so that the heating element 51 is heated more uniformly, and the aerosol taste is better. Of course, it is understood that in other embodiments, the heat generating body 51 may not be limited to be in a sheet shape, and may be in a columnar shape or a needle shape.

Further, in some embodiments, the heating assembly 50 further includes a mount 52. The fixing frame 52 is used for installing the heating element 51, and can be engaged with the fixing tube 20 in a sliding manner, and can be sleeved by the upper cover 10. The fixing frame 52 is a sleeve body, and the sleeve body includes a first sleeve joint portion 521 and a second sleeve joint portion 522. The first and second sockets 521, 522 are disposed side-by-side in the lateral direction and are integrally formed, in particular, in some embodiments, the first and second sockets 521, 522 are integrally formed by injection molding or casting. The control circuit board 60 can be accommodated inside the first socket 521. The control circuit board 60 may be coupled to the heating assembly 50 and may be used to turn the heating assembly 50 on or off. The side wall of the first sleeving part 521 adjacent to the second sleeving part 522 is provided with an engaging part 5211. The engagement portion 5211 can be an engagement boss provided on the first sleeve portion 521. Which is engageable with the first extension 32 of the outer sleeve 30. Specifically, the first extension portion 32 may form a sliding groove, and the sliding groove may be engaged with the engaging boss through sliding. In some embodiments, the mount 52 further includes a flange 523 that mates with the upper cover 10. The flange 523 may be disposed on the outer peripheral wall of the first engaging portion 521 in a protruding manner, and is located at an end of the first engaging portion 521 away from the second engaging portion 522.

Further, in some embodiments, the heating assembly 50 further includes a bracket 53 cooperatively mounted with the fixing frame 52, and the fixing frame 52 can be sleeved on the bracket 53. The heating element 51 may be provided on the stand 53.

Further, in some embodiments, the aerosol generating device further comprises a power supply assembly 70. The power supply assembly 70 is mechanically and electrically connected to the heating assembly 50 for supplying power to the heating assembly 50. The power supply assembly 70 includes a power supply housing 71 and a battery 72 disposed in the power supply housing 71. The fixing frame 52 may be disposed at an open end of the power supply case 71. A switch button 711 may be disposed on the power supply housing 71, and the switch button 711 may be connected to the control circuit board 60. The battery 72 may be connected to the heating assembly 50 and may provide power to the heating assembly 50. Specifically, in some embodiments, the battery 72 can be connected to the heating assembly 50 through the control circuit board 60.

Fig. 10 and 11 show a second embodiment of the aerosol-generating device of the invention. Which differs from the first embodiment in that the stationary tube 20 may comprise a circular inner tube wall 20a and an outer tube wall 20b. The inner tube wall 20a may be used for insertion of the aerosol-forming substrate 200. The shape and size of the inner tube wall 20a is adapted to the shape and size of the aerosol-forming substrate 200. The outer tube wall 20b may be sleeved between the inner tube walls 20a, and the outer tube wall 20b may cooperate with the inner tube wall 20a to form a first air flow channel 213.

In this embodiment, the inner tube wall 20a may form the fixing portion 21 and the mounting portion 22, and the inner tube wall 20a includes a plurality of inner tube wall units 210a disposed at intervals and surrounding to form a columnar structure, in this embodiment, the columnar structure may have a circular cross section, and a radial dimension of the columnar structure may be adapted to a radial dimension of the aerosol-forming substrate 200. One end of the inner pipe wall unit 210a may be connected through the mounting portion 22. The interval between two inner tube wall units 210a disposed adjacently may form a slot 214, and the slot 214 may communicate with the first opening 211 and the second opening 212. When the aerosol-forming substrate 200 is inserted into the inner tube wall 20a, the inner tube wall units 210a may contact the aerosol-forming substrate 200, and due to the presence of the slots 214, two inner tube wall units 210a disposed adjacently may generate a pressing force on the aerosol-forming substrate 200, so that the aerosol-forming substrate 200 is deformed. In some embodiments, the inner tube wall 20a can be integrally formed with the upper cover 10, although it is understood that in other embodiments, the inner tube wall 20a can be detachably connected to the upper cover 10.

In this embodiment, the outer tube wall 20b may be a metal tube, and in particular, the outer tube wall 20b may be a stainless steel tube. The outer tube wall 20b and the inner tube wall 20a may be of a split structure. Of course, it will be appreciated that in other embodiments, the outer tube wall 20b may be integrally formed with the inner tube wall 20 a. The outer tube wall 20b may have a hollow structure with openings at both ends, and may have a cylindrical shape. The outer tube wall 20b may have a cross-sectional dimension that is greater than the cross-sectional dimension of the inner tube wall 20a such that a space is left between the outer tube wall 20b and the inner tube wall 20 a. The first air flow channel 213 may be disposed inside the outer tube wall 20b and between the outer tube wall 20b and the inner tube wall 20a, formed by the space between the outer tube wall 20b and the inner tube wall 20 a. The slot 214 may be disposed in communication with the first gas flow channel 213, which may allow gas to enter the first gas flow channel 213.

In this embodiment, the fixing tube 20 may further include a connection portion 211a, and the connection portion 211a is disposed on the inner tube wall 20a, specifically, may be located on an outer side wall of each inner tube wall unit 210a and protrudes from the outer side wall of the inner tube wall unit 210 a. The connection portion 211a may be elongated and may be disposed along a longitudinal extension of the inner tube wall unit 210a, for connecting the inner tube wall 20a and the outer tube wall 20b, and for mounting and positioning the outer tube wall 20 b.

Fig. 12 shows a second embodiment of the aerosol-generating device of the invention, which differs from the first embodiment in that. The heating element 51 may be needle-shaped. The heating element 51 includes a cylindrical body 511 and a peak structure 512, wherein the peak structure 512 is disposed at one end of the body 511, which can facilitate the insertion of the heating element 51 into the aerosol-forming substrate 200. The peak structure 512 may be conical. By providing the body 511 of the heating element 51 with a cylindrical shape and providing the peak structure 512 with a conical shape, the aerosol-forming substrate 200 can be withdrawn from the second opening 212 to the first opening 211 by rotating and separated from the heating element 51, thereby facilitating the disassembly and replacement of the aerosol-forming substrate 200.

Fig. 13 shows a third embodiment of the aerosol-generating device according to the invention, which differs from the first embodiment in that the end of the stationary tube 20 remote from the first opening 211 may be provided with a bottom wall 24, that the first air flow channel 213 may extend from the first opening of the stationary tube 20 towards the end remote from the first opening, i.e. towards the bottom wall 24, and then be bent from the bottom of the aerosol-forming substrate 200 into the aerosol-forming substrate.

It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. An aerosol-generating device comprising a fixing tube (20) for fixing an aerosol-forming substrate (200), an outer sleeve (30), a heating element (50), an air flow channel;

The fixed tube (20) is of a hollow structure, one end of the fixed tube is provided with a first opening (211) for inserting an aerosol forming substrate, and the other end of the fixed tube is provided with a second opening (212) communicated with the first opening (211);

The outer sleeve (30) is sleeved on the periphery of the fixed tube (20), and one end of the outer sleeve (30) is provided with a supporting wall (311) for supporting the aerosol-forming substrate (200); the support wall (311) is arranged opposite to the second opening (212);

The heating assembly (50) is inserted from the support wall (311) through the second opening (212) into the aerosol-forming substrate (200);

The airflow channels include a first airflow channel (213) and a second airflow channel (3112); the first airflow channel (213) is arranged on the inner side of the pipe wall of the fixed pipe (20), is communicated with the first opening (211), and extends towards one end of the second opening (212) so as to allow external air to enter;

A plurality of bosses (312) are arranged on the supporting wall (311) at intervals; the second airflow channel (3112) is formed between two adjacent bosses (312), and the second airflow channel (3112) is communicated with the first airflow channel (213) and the second opening (212) so that gas in the first airflow channel (213) enters the aerosol-forming substrate (200).

2. Aerosol-generating device according to claim 1, characterized in that the first air flow channel (213) is arranged in the longitudinal direction of the stationary tube (20);

And/or the end of the fixed tube (20) away from the first opening (211) is provided with a bottom wall (24).

3. Aerosol-generating device according to claim 1, characterized in that the cross section of the stationary tube (20) is non-circular;

the first air flow channel (213) is formed by recessing part of the pipe wall of the fixed pipe (20).

4. Aerosol-generating device according to claim 1, characterized in that the fixed tube (20) comprises a hollow and through-penetrating fixing portion (21); the first opening (211) and the second opening (212) are arranged at two ends of the fixed part (21);

the cross section of the fixing part (21) is elliptical, and the size of the fixing part is matched with the cross section size of the aerosol-forming substrate (200);

the cross section of the fixing part (21) comprises a long shaft and a short shaft which is arranged to cross the long shaft;

both ends of the long shaft are provided with the first air flow passage (213).

5. The aerosol-generating device according to claim 1, wherein the stationary tube (20) comprises a circular inner tube wall (20 a), and an outer tube wall (20 b) disposed at the periphery of the inner tube wall (20 a) and spaced apart from the inner tube wall (20 a);

the first air flow channel (213) is arranged inside the outer tube wall (20 b) and between the outer tube wall (20 b) and the inner tube wall (20 a).

6. The aerosol-generating device according to claim 5, wherein the inner tube wall (20 a) comprises a plurality of inner tube wall units (210 a) arranged at intervals and surrounding to form a columnar structure;

The spacing between two adjacent inner tube wall units (210 a) forms a slot (214) which communicates with the first air flow channel (213) and can enable the two adjacent inner tube wall units (210 a) to generate extrusion force on the aerosol-forming substrate (200);

the slot (214) is provided in communication with the first opening (211) and the second opening (212).

7. The aerosol-generating device according to claim 5, wherein the stationary tube (20) further comprises a connection portion (211 a) provided on the inner tube wall (20 a) connecting the inner tube wall (20 a) and the outer tube wall (20 b).

8. Aerosol-generating device according to claim 5, characterized in that the inner tube wall (20 a) and the outer tube wall (20 b) are integrally formed;

Or the inner tube wall (20 a) and the outer tube wall (20 b) are detachably connected.

9. The aerosol-generating device according to claim 7, further comprising an upper cover (10) fitted around the periphery of the fixed tube (20); the inner tube wall (20 a) is integrally formed with the upper cover (10).

10. Aerosol-generating device according to claim 1, characterized in that the support wall (311) is provided with perforations (3111) through which the heating element (50) is arranged.

11. Aerosol-generating device according to claim 1, characterized in that the heating assembly (50) comprises a heating body (51) which is insertable from the support wall (311) and from the second opening (212) into the aerosol-forming substrate (200).

12. Aerosol-generating device according to claim 11, characterized in that the cross section of the fixing portion (21) of the fixing tube (20) comprises a major axis and a minor axis arranged crosswise to the major axis; a first airflow channel (213) of the airflow channel is arranged at both ends of the long shaft;

The heating element (51) is sheet-shaped, and when the heating element (51) is inserted into the aerosol-forming substrate (200), the width direction of the heating element (51) coincides with the length direction of the short axis.

13. The aerosol-generating device according to claim 11, wherein the heating element (51) is columnar, and the heating element (51) comprises a columnar body (511) and a conical tip structure (512) provided at one end of the body (511).

14. Aerosol-generating device according to claim 1, characterized in that it further comprises an upper cover (10) fitted around the periphery of the fixed tube (20); the upper cover (10) is provided with a socket (111) corresponding to the first opening (211) for inserting the aerosol-forming substrate (200) into the fixed tube (20).

15. Aerosol-generating device according to claim 14, characterized in that the shape of the socket (111) is adapted to the cross-sectional shape of the stationary tube (20).

16. Aerosol-generating device according to claim 14, characterized in that the socket (111) is provided with a guiding bevel for guiding the insertion of the aerosol-forming substrate (200);

The guide slope extends from an end surface of the insertion opening (111) away from one end of the fixed pipe (20) toward the fixed pipe (20).