WO2022007410A1 - Aerosol generating device - Google Patents

Abstract

The present invention relates to an aerosol generating device, comprising a fixing tube (20) for fixing an aerosol forming substrate (200), a heating assembly (50), and an air flow channel (213), wherein the fixing tube (20) is of a hollow structure, with one end thereof being provided with a first opening (211) for insertion into the aerosol forming substrate; the heating assembly (50) is inserted into the aerosol forming substrate (200) from an end of the fixing tube (20) that is away from the first opening; and the air flow channel (213) is arranged on an inner side of a tube wall of the fixing tube (20) to allow external air to enter the aerosol forming substrate (200). According to the aerosol generating device, the air flow channel is shortened, which prevents blocking of the air flow channel and prevents direct transfer of heat to the tube wall.

Description

aerosol generating device technical field

The present invention relates to a heat-not-burn atomization device, and more particularly, to an aerosol generating device.

Background technique

The existing aerosol generating device includes a fixing tube for accommodating the aerosol-forming substrate and a lower case for accommodating the battery. A heating element is arranged in the fixed tube, and the battery is used for powering the heating element. The lower shell is provided with an air inlet and an air passage communicating with the air inlet and the fixed pipe. When the aerosol forms the matrix and heats up and the user smokes, the external air enters the air passage from the air inlet and then enters the fixed pipe, and passes through the air passage. The interior of the aerosol-forming matrix transports the smoke into the user's mouth.

technical problem

However, with this structure, due to the close distance between the heating element and the pipe wall of the fixed pipe, the heat of the heating element is easily transferred to the pipe wall of the fixed pipe to make the temperature higher, which is easy to bring discomfort to the user's hand. On the other hand, the air passage is arranged in the lower casing, which has a complex structure and a long path, and is prone to blockage.

technical solutions

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

The technical solution adopted by the present invention to solve the technical problem is: constructing an aerosol generating device, including a fixing tube for fixing the aerosol-forming substrate, and a heating assembly;

The fixing tube is a hollow structure, and one end is provided with a first opening for inserting the aerosol forming matrix;

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

the heating assembly is inserted into the aerosol-forming substrate from an end of the fixing tube away from the first opening;

The aerosol generating device further includes an air flow channel disposed on the inner side of the pipe wall of the fixed pipe and on the support wall for external air to enter the aerosol-forming substrate.

Preferably, the air flow channel includes a first opening, which is arranged on the inner side of the tube wall of the fixed tube and is connected to the first opening and extends toward the end away from the first opening in communication for external air to enter the aerosol-forming substrate. an air flow channel.

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

The gas flow channel further includes a second gas flow channel disposed 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, one end of the fixing tube away from the first opening is provided with a second opening communicating with the first opening;

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

The second airflow channel is disposed on the support wall and communicates with the first airflow channel and the second opening.

Preferably, the first airflow channel is arranged along the longitudinal direction of the fixed pipe;

And/or, a bottom wall is provided at one end of the fixing tube away from the first opening.

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

The first airflow channel is formed by a part of the pipe wall of the fixed pipe concave.

Preferably, the fixing tube includes a hollow fixing portion with two ends passing through; the first opening and the second opening are both provided at both ends of the fixing portion;

The cross section of the fixing part is oval;

The cross-section of the fixing part includes a long axis and a short axis that intersects the long axis;

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

Preferably, the fixed tube comprises a circular inner tube wall and an outer tube wall disposed on the periphery of the inner tube wall and spaced apart from the inner tube wall;

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

Preferably, the inner tube wall comprises a plurality of inner tube wall units arranged at intervals and surrounding to form a columnar structure;

The interval between the two adjacent inner tube wall units is formed to communicate with the first air flow channel, and the two adjacent inner tube wall units can press the aerosol-forming substrate force slot;

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

Preferably, the fixing tube further includes a connecting portion provided on the inner tube wall to connect the inner tube wall and the outer tube wall.

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

Alternatively, the inner tube wall and the outer tube wall are detachably connected.

Preferably, it also includes an upper cover sleeved on the periphery of the fixing tube; the inner tube wall and the upper cover are integrally formed.

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

Preferably, the support wall is provided with a perforation for the heating element to pass through.

Preferably, the heating assembly includes a heat generating body which can be passed through the support wall and inserted into the aerosol-forming substrate from the second opening.

Preferably, the cross section of the fixing portion of the fixing pipe includes a long axis and a short axis intersecting with the long axis; both ends of the long axis are provided with the first airflow channel of the airflow channel;

The heating element is in the shape of a sheet, and when the heating element is inserted into the aerosol-forming matrix, the width direction of the heating element coincides with the length direction of the short axis.

Preferably, the heating element is in the shape of a column.

Preferably, the heating body includes a cylindrical body and a conical apex structure disposed at one end of the body.

Preferably, it also includes an upper cover sleeved on the periphery of the fixing tube; the upper cover is provided with a socket corresponding to the first opening for the aerosol-forming substrate to be inserted into the fixing tube.

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

Preferably, the socket is provided with a guiding slope for guiding the insertion of the aerosol-forming substrate;

The guide slope extends from the end face of the socket away from the end of the fixed pipe toward the fixed pipe.

beneficial effect

Implementing the aerosol generating device of the present invention has the following beneficial effects: the aerosol generating device can allow external air to enter the aerosol-forming matrix by arranging an air flow channel on the inner side of the pipe wall of the fixed pipe, so that it is convenient for users to suck and can be used. Shorten the airflow channel and avoid blockage of the airflow channel, and can avoid the direct transfer of heat to the tube wall, so as to avoid the user's inability to hold or discomfort during suction. The aerosol generating device has the advantages of simple structure, high airflow transmission efficiency, not easy to block, and good user experience.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural diagram of a first embodiment of an aerosol generating device of the present invention;

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

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

Fig. 4 is the structural decomposition schematic diagram of the aerosol generating device of the present invention shown in Fig. 1;

FIG. 5 is a schematic structural diagram of the cooperation between the upper cover and the fixing tube of the aerosol generating device of the present invention shown in FIG. 1;

Fig. 6 is the structural representation of the upper cover of the aerosol generating device of the present invention shown in Fig. 4;

Fig. 7 is the structural representation of the fixed tube of the aerosol generating device of the present invention shown in Fig. 4;

Fig. 8 is the structural representation of the outer casing of the aerosol generating device of the present invention shown in Fig. 4;

Fig. 9 is the state schematic diagram of the cooperation of the heating assembly and the power supply assembly of the aerosol generating device of the present invention shown in Fig. 4;

10 is a schematic structural diagram of the cooperation between the upper cover and the fixed tube in the second embodiment of the aerosol generating device of the present invention;

Fig. 11 is a schematic exploded view of the structure of the fixed tube in the second embodiment of the aerosol generating device shown in Fig. 10;

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

Fig. 13 shows a partial cross-sectional view of the fixing tube in the third embodiment of the aerosol generating device of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to have a clearer understanding of the technical features, objects and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

It should be understood that terms such as "front", "rear", "left", "right", "upper", "lower", "first" and "second" are only for the convenience of describing the technical solutions of the present invention , rather than indicating that the indicated device or element must have a specific difference, and therefore should not be construed as a limitation of the present invention. It should be noted that when a piece is said to be "connected" to another piece, it can be directly connected to the other piece or there may be an intervening piece at the same time. Unless otherwise defined, 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 terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

1 and 2 show a first embodiment of the aerosol generating device of the present invention. The aerosol generating device 100 can use a low-temperature heat-not-burn method to heat the aerosol-forming substrate 200. In this embodiment, the aerosol-forming substrate 200 can be cylindrical. Specifically, the aerosol-forming substrate 200 can be a cigarette. .

As shown in FIG. 1 to FIG. 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 periphery of the fixing tube 20 , and can form an upper cover assembly with the fixing tube 20 , and the upper cover assembly accommodates the aerosol-forming substrate 200 . The fixing tube 20 is disposed in the upper cover 10 and can be inserted into the aerosol-forming substrate 200 for fixing the aerosol-forming substrate 200 . The heating assembly 50 is used to be inserted into the aerosol-forming substrate 200 of the fixing tube 10 and used to heat the aerosol-forming substrate 200 . As shown in FIG. 3 to FIG. 6 , further, in this embodiment, the upper cover 10 can be detachably connected with the fixing tube 20 , and is connected to form an integrated structure by providing a connecting component. Of course, it can be understood that in other In some embodiments, the upper cover 10 and the fixing tube 20 can also 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 disposed along the circumference of the top wall 11 and extending downward; the inner side of the cylindrical side wall 12 can surround a accommodating cavity . The cross section of the top wall 11 may be substantially but not limited to an oval shape. The upper cover 10 can be provided with a socket 111 , and the socket 111 can 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 11 can be adapted to the cross-sectional shape of the fixing tube 20 . Specifically, the shape of the socket 11 can be adapted to the cross-sectional shape of the fixing portion 21 of the fixing tube 20 . The socket 11 is roughly but not limited to an oval shape, and a guide slope is provided on the socket 11 , and the guide slope can extend from the end face of the socket 11 away from the fixed tube 20 toward the fixed tube 20 , so that the socket 11 can be roughly In the shape of a horn, the guide slope can be used to guide the insertion of the aerosol-forming gas 100 . It can be understood that, in other embodiments, the guide slope can be omitted.

As shown in FIG. 3 to FIG. 5 and FIG. 7 , further, in this embodiment, the fixing tube 20 is a hollow structure with two ends penetrating through, and is used for the aerosol forming matrix 200 to pass through. Further, in this 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 can be installed with the upper cover 10 .

In this embodiment, the fixing portion 21 is in a tubular shape, which is a hollow structure with two ends passing through, and a plug-in channel 210 is formed inside. Both ends of the fixing tube 20 are respectively provided with a first opening 211 and a second opening 212 ; specifically, in some embodiments, the first opening 211 and the second opening 212 are respectively provided at both ends of the fixing portion 21 . , and arranged symmetrically in the axial direction, and communicated with the insertion channel 210, the aerosol-forming substrate 200 can be inserted into the fixing tube from the first opening 211, and withdraw from the fixing tube 212 toward the first opening 211, specifically , the aerosol-forming substrate 200 can be inserted into the second opening 212 , and can 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 also 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 bell mouth, and the radial dimension of the first opening 211 may be gradually reduced toward the second opening 212 to facilitate the insertion of the aerosol-forming substrate 200 . Of course, it can be understood that, in other embodiments, a bottom wall may be provided at one end of the fixing portion 21 away from the first opening 211 .

Further, in this embodiment, the cross-section of the fixing tube 20 may be non-circular, and specifically, the cross-section of the fixing tube 20 is, but not limited to, an ellipse. Specifically, the cross-section of the fixing portion 21 may be approximately but not limited to an oval shape, and in other embodiments, the cross-section of the fixing tube 21 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 . Specifically, the cross-sectional dimension of the fixing portion 21 may include a long axis and a short axis intersecting with the long axis. The length of the long axis can be greater than the radial dimension of the aerosol-forming substrate 200, and the short axis can be comparable to the radial dimension of the aerosol-forming substrate 200, so that the outer surface of the side of the aerosol-forming substrate 200 is mostly the same as the radial dimension of the aerosol-forming substrate 200. The inner surfaces of the plug-in channels 210 are in surface contact, so as to prevent the aerosol-forming substrate 200 from being deformed due to the fixing tube 20 pressing the aerosol-forming substrate 200 .

Further, in this embodiment, the mounting portion 22 is disposed at the first opening 211 of the fixing portion 21 , and its cross-section can be oval, and its cross-sectional shape and size can be the same as the cross-section of the inner side of the upper cover 10 . Shape and size match. The inside of the mounting portion 22 is provided with a cavity 221 having an opening. The top surface of the cavity 221 is provided with an opening, the opening can communicate with the socket 111 on the upper cover 10 , and is communicated with the insertion channel 210 of the fixing portion 21 through the first opening 211 . In some embodiments, the mounting portion 22 and the fixing portion 21 may be integrally formed by casting or injection molding.

Further, in this embodiment, the mounting portion 22 can be detachably connected to the upper cover 10 by providing a connecting structure. Of course, in other embodiments, the mounting portion 22 may also be integrally formed with the upper cover 10 . In some embodiments, the connection structure includes a buckle 222 and a slot 121 . The buckle 222 may be disposed on the side wall 122 of the mounting portion 22 , and there may be a plurality of the buckles 222 . Specifically, in some embodiments, the buckles 222 may be multiple, and the plurality of buckles 222 may be along the side. The walls 122 are circumferentially spaced apart. The card slot 121 is disposed on the inner side of the upper cover 10 and close to the top wall of the upper cover 10 , and there may be a plurality of the card slots 121 . During installation, the upper cover 10 can be sleeved to the periphery of the fixing portion 21 along the mounting portion 22 , and the buckles 222 of the mounting portion 22 can be clamped in the card slots 121 in a one-to-one correspondence. Through this connection structure, the fixing tube 20 can also be taken out when the upper cover 10 is slid.

As shown in FIG. 3 to FIG. 5 and FIG. 8 , further, in this embodiment, the aerosol generating device may further include an outer sleeve 30 , the outer sleeve 30 is disposed in the upper cover 10 and sleeved in the fixing The periphery of the tube 20 is used for heat insulation to prevent heat from being directly transferred to the upper cover, which would make the upper cover too high to hold or feel uncomfortable for the user, and can cooperate with the fixed tube 20 to form an airflow channel. In other embodiments, the outer sleeve 30 may be omitted.

In this embodiment, the outer sleeve 30 is sleeved on the periphery of the fixing portion 21 . On the one hand, it can play a heat insulating role during heating, and on the other hand, it can be used to accommodate the residue of the heated aerosol-forming substrate 200 . When cleaning the residue, the upper cover 10 can be slid and the fixing tube 10 can be pulled out from the outer casing 30 at the same time, and then the residue of the outer casing 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 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 this embodiment, the cross section of the outer sleeve 30 may be approximately oval. One end of the outer sleeve 30 can 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 and is disposed opposite to the second opening 212 , which can be used to support the aerosol-forming substrate 200 . The support wall 311 is also 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 assembly 50. In some embodiments, the through hole 3111 is circular, which can be used for The heating element 51 of the heating element 50 is inserted into the fixed tube 10 so that the heating element 51 of the heating element 50 can 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 as to prevent the aerosol-forming substrate 200 from passing through the outer sleeve 30 . In this embodiment, a plurality of bosses 312 may be provided on the support wall 311 , and the plurality of bosses 312 may be arranged 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 can be integrally formed with the support wall 311 by injection molding or casting. In some embodiments, the outer sleeve 30 further includes a first extending portion 32 disposed on one side of the tubular body 31 and protruding outward, and a second extending portion 33 disposed on one end of the tubular body 31 and protruding. Both the first extension portion 32 and the second extension portion 33 can be slidably engaged with the heating element 50 , thereby detachably connecting the entire outer sleeve 30 and the heating element 50 .

As shown in FIG. 2 , FIG. 3 , FIG. 5 , FIG. 7 and FIG. 8 , in this embodiment, the airflow channel is disposed on the inner side of the pipe wall of the fixed pipe 20 and on the support wall 311 , and is connected with the first opening. 211 communicates with the second opening 212 . The gas flow channel may be used for external gas to enter the aerosol-forming substrate 200 . By opening airflow channels on the inner side of the pipe wall of the fixed pipe 20 and the support wall 311, the airflow transmission path can be shortened, the airflow transmission efficiency can be improved, the occurrence of blockage can be reduced, and heat can be prevented from being directly transferred to the pipe wall, preventing users from sucking Unable to hold or discomfort.

In this embodiment, the airflow channel includes a first airflow channel 213 and a second airflow channel 3112 . The first airflow channel 213 is disposed on the inner side of the tube wall of the fixing tube 20 and communicates with the first opening 211 , and can extend along the longitudinal direction of the fixing tube 20 away from one end of the first opening 211 , namely the second opening 212 . Specifically, the first airflow channel 213 is provided at both ends of the long axis, and can be formed by a part of the wall of the fixing tube 20 . In this embodiment, the first airflow channel 213 can be formed by the fixing part 21 and the The two ends of the long axis are formed with correspondingly disposed tube wall recesses. The second airflow channel 3112 may be disposed on the support wall 311 and communicate with the first airflow channel 213 and the second opening 212 . In this embodiment, specifically, the second airflow channel 3112 may be formed by the interval between two adjacent bosses 312 . When the user inhales, the outside air can enter the fixing tube 20 through the socket 111 of the upper cover 10 and reach the second air passage 3112 through the first air passage 213, and then enter the second air passage 3112 from the second air passage 3112. In the aerosol-forming substrate 200, the atomized gas formed by heating the aerosol-forming substrate 200 is brought out.

As shown in FIGS. 1 to 4 , further, in this 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 socket 111 by sliding when the aerosol-free substrate 200 is inserted into the fixing tube 10 , thereby preventing dust from entering the fixing tube 10 . In some embodiments, the protective cover 40 includes a cover body 41 , and the cover body 41 can be disposed on the top wall 11 of the upper cover 10 and can slide back and forth in a direction 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 body 41 is provided with a connecting column 411, and the connecting column 411 can pass through the guide hole 112 is inserted into the upper cover 10 . A sliding block 42 can be disposed in the cavity 121 of the mounting portion 12 , the sliding block 42 can be slidably disposed in the direction of the socket 111 , and the connecting post 411 can be connected with the sliding block 42 to drive the sliding block 42 to slide. An elastic member 43 may be disposed between the sliding block 42 and the side wall of the mounting portion 12 . The elastic member 43 can generate elastic force to facilitate the sliding and reset of the sliding block 42 .

As shown in FIG. 2 to FIG. 4 and FIG. 9 , the heating element 50 includes a heating element 51 . The heating element 51 can pass through the support wall 311 and be inserted into the aerosol-forming substrate 200 from the second opening 212 . In this embodiment, the heating element 51 may be in a sheet shape, and when the heating element 51 is inserted into the aerosol forming substrate 200 , the width direction of the heating element 52 may coincide with the length direction of the short axis. The thickness direction of the heating body 52 can be parallel to the long axis direction of the fixing portion 21 , so that the first airflow channel 213 can be located on two opposite sides of the heating body 51 , so that the airflow can be uniform when heating the aerosol to form the substrate 200 . The ground flows to both sides of the heating element 52, so that the heating element 52 is heated more uniformly and the aerosol taste is better. Of course, it can be understood that in other embodiments, the heating body 51 may not be limited to be in the shape of a sheet, but may be in the shape of a column or a needle.

Further, in some embodiments, the heating assembly 50 further includes a fixing frame 52 . The fixing frame 52 is used for installing the heating element 51 , and can be slidably engaged with the airway tube 20 , and can be sleeved on the upper cover 30 . The fixing frame 52 is a sleeve body, and the sleeve body includes a first sleeve part 521 and a second sleeve part 522 . The first socket part 521 and the second socket part 522 are arranged side by side in the lateral direction and are integrally formed. Specifically, in some embodiments, the first socket part 521 and the second socket part 522 are injection-molded. Or cast in one piece. The inner side of the first socket portion 521 can accommodate the control circuit board 60 . The control circuit board 60 can be connected to the heating assembly 50 and can be used to turn on or off the heating assembly 50 . An engaging portion 5211 is provided on the side wall of the first socket portion 521 and the second socket portion 522 adjacent to each other. The engaging portion 5211 can be a snap-fitting boss disposed on the first socket portion 521 . It can be engaged with the first extension portion 32 of the outer sleeve 30 . Specifically, the first extension portion 32 can form a sliding slot, and the sliding slot can be engaged with the engaging boss by sliding. In some embodiments, the fixing frame 52 further includes a flange 523 matched with the upper cover 10 . The flange 523 can be protruded from the outer peripheral wall of the first socket portion 521 and located at an end of the first socket portion 521 away from the second socket portion 522 .

Further, in some embodiments, the heating assembly 50 further includes a bracket 53 installed in cooperation with the fixing frame 52 , and the fixing frame 52 can be sleeved on the bracket 53 . The heating body 51 can be disposed on the bracket 53 .

Further, in some embodiments, the aerosol generating device further includes a power supply component 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 case 71 and a battery 72 disposed in the power supply case 71 . The fixing frame 52 can be disposed on the open end of the power supply housing 71 . A switch button 711 can be provided on the power supply shell 71 , and the switch button 711 can be connected to the control circuit board 60 . The battery 72 can be connected to the heating assembly 50 and can supply 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 .

10 and 11 show a second embodiment of the aerosol generating device of the present invention. The difference from the first embodiment is that the fixing tube 20 may include a circular inner tube wall 20a and an outer tube wall 20b. The inner tube wall 20a can be used for inserting the aerosol-forming substrate 200 . The shape and size of the inner tube wall 20a are adapted to the shape and size of the aerosol-forming substrate 200 . The outer tube wall 20b can be sleeved between the inner tube walls 20a, and the outer tube wall 20b can cooperate with the inner tube wall 20a to form a first airflow channel 213 .

In this embodiment, the inner tube wall 20a can 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 arranged at intervals and enclosing a columnar structure. In this embodiment, Among them, the cross section of the columnar structure may be circular, and its radial dimension may be adapted to the radial dimension of the aerosol-forming substrate 200 . One end of the inner pipe wall unit 210 a may be connected through the mounting portion 22 . The interval between two adjacent inner tube wall units 210 a 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 unit 210a can be in contact with the aerosol-forming substrate 200. Due to the existence of the slot 214, two adjacent inner tubes The wall unit 210a 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 may be integrally formed with the upper cover 10 . Of course, it is understood that in other embodiments, the inner tube wall 20a may also be detachably connected to the upper cover 10 .

In this embodiment, the outer tube wall 20b may be a metal tube, and specifically, the outer tube wall 20b may be a stainless steel tube. The outer tube wall 20b and the inner tube wall 20a may be separate structures. Of course, it can be understood that in other embodiments, the outer tube wall 20b can be integrally formed with the inner tube wall 20a. The outer tube wall 20b may be a hollow structure with openings at both ends, and may be cylindrical. The cross-sectional dimension of the outer tube wall 20b may be larger than the cross-sectional dimension of the inner tube wall 20a, so that a space is left between the outer tube wall 20b and the inner tube wall 20a. The first airflow channel 213 may be disposed on the inner side of the outer tube wall 20b, between the outer tube wall 20b and the inner tube wall 20a, and formed by the interval between the outer tube wall 20b and the inner tube wall 20a . The slot 214 can be communicated with the first airflow channel 213 , and can allow gas to enter the first airflow channel 213 .

In this embodiment, the fixing tube 20 may further include a connecting portion 211a, and the connecting portion 211a is disposed on the inner tube wall 20a. The outer side wall of the inner pipe wall unit 210a is provided. The connecting portion 211a can be elongated and extend along the longitudinal direction of the inner tube wall unit 210a, for connecting the inner tube wall 20a and the outer tube wall 20b, and for installing and positioning the outer tube wall 20b.

Figure 12 shows a second embodiment of the aerosol generating device of the present invention, which differs from the first embodiment. The heating element 51 may be needle-shaped. The heating element 51 includes a cylindrical body 511 and a spire structure 512 . The apex structure 512 is disposed at one end of the body 511 , which facilitates the insertion of the heating element 51 into the aerosol-forming substrate 200 . The apex structure 512 may have a conical shape. By setting the body 511 of the heating element 51 in a cylindrical shape and the apex structure 512 in a conical shape, the aerosol-forming base 200 can be withdrawn from the second opening 212 to the first opening 211 by rotating, and It is separated from the heating body 51 , thereby facilitating the disassembly and replacement of the aerosol-forming substrate 200 .

FIG. 13 shows a third embodiment of the aerosol generating device of the present invention, which is different from the first embodiment in that a bottom wall 24 can be provided at one end of the fixed tube 20 away from the first opening 211 , and the first airflow channel 213 can extend from the first opening of the fixing tube 20 toward the end away from the first opening, that is, extend toward the bottom wall 24, and then bend and enter the aerosol-forming substrate from the bottom of the aerosol-forming substrate 200 middle.

It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention; In other words, without departing from the concept of the present invention, the above-mentioned technical features can be freely combined, and some deformations and improvements can be made, and these all belong to the protection scope of the present invention; All equivalent transformations and modifications made shall fall within the scope of the claims of the present invention.

Claims (20)

An aerosol generating device, characterized by comprising a fixing tube (20) for fixing an aerosol-forming substrate (200), and a heating assembly (50); The fixing tube (20) is a hollow structure, and one end is provided with a first opening (211) for inserting the aerosol-forming matrix; The heating assembly (50) is inserted into the aerosol-forming substrate (200) from an end of the fixing tube away from the first opening; The aerosol generating device further comprises an air flow channel provided on the inner side of the pipe wall of the fixed pipe (20) for external air to enter the aerosol-forming substrate (200). The aerosol generating device according to claim 1, characterized in that, the air flow channel comprises an inner side of the pipe wall of the fixed pipe (20) and is connected to the first opening (211) and faces away from the first opening (211). One end of an opening (211) is extended to communicate with a first airflow channel (213) for external air to enter the aerosol-forming substrate (200). The aerosol generating device according to claim 2, characterized in that, the aerosol generating device further comprises an outer sleeve (30) sleeved on the periphery of the fixing tube (20); The gas flow channel further comprises a set in the outer sleeve (30) and communicated with the first gas flow channel (213) for the gas of the first gas flow channel (213) to enter the aerosol-forming substrate (200) of the second airflow channel (3112). The aerosol generating device according to claim 3, characterized in that, a second opening communicating with the first opening (211) is provided at one end of the fixing tube (20) away from the first opening; One end of the outer sleeve is provided with a supporting wall (311) supporting the aerosol-forming substrate (200); the supporting wall (311) is arranged opposite to the second opening (212); the heating assembly (50) ) penetrated from the support wall (311) and inserted into the aerosol-forming substrate from the second opening (212); The second airflow channel (3112) is disposed on the support wall (311) and communicates with the first airflow channel (213) and the second opening (212). The aerosol generating device according to claim 2, wherein the first airflow channel (213) is arranged along the longitudinal direction of the fixed tube (20); And/or, a bottom wall (24) is provided at one end of the fixing tube (20) away from the first opening (211). The aerosol generating device according to claim 2, characterized in that, the cross section of the fixing tube (20) is non-circular; The first airflow channel (213) is formed by a part of the pipe wall of the fixed pipe (20) concavely formed. The aerosol generating device according to claim 4, wherein the fixing tube (20) comprises a hollow fixing portion (21) with two ends passing through; the first opening (211) and the second opening (212) are arranged on both ends of the fixing portion (21); The cross section of the fixing portion (21) is oval; The cross-section of the fixing portion (21) includes a long axis and a short axis intersecting with the long axis; Both ends of the long shaft are provided with the first airflow channel (213). The aerosol generating device according to claim 4, characterized in that, the fixed tube (20) comprises a circular inner tube wall (20a), and is disposed on the periphery of the inner tube wall (20a) and is connected with the inner tube wall (20a). the outer pipe walls (20b) arranged at intervals from the inner pipe wall (20a); The first airflow channel (213) is disposed inside the outer tube wall (20b) and between the outer tube wall (20b) and the inner tube wall (20a). The aerosol generating device according to claim 8, characterized in that, the inner tube wall (20a) comprises a plurality of inner tube wall units (210a) arranged at intervals and surrounding to form a columnar structure; The interval between the two adjacent inner tube wall units (210a) is formed to communicate with the first air flow channel (213) and can make the two adjacent inner tube wall units (210a) pair with each other. The aerosol forms a slot (214) in which the matrix (200) produces a squeezing force; The slot (214) is communicated with the first opening (211) and the second opening (212). The aerosol generating device according to claim 8, characterized in that, the fixed tube (20) further comprises a device disposed on the inner tube wall (20a) to connect the inner tube wall (20a) and the outer tube Connection (211a) of the wall (20b). The aerosol generating device according to claim 8, wherein the inner tube wall (20a) and the outer tube wall (20b) are integrally formed; Alternatively, the inner tube wall (20a) and the outer tube wall (20b) are detachably connected. The aerosol generating device according to claim 10, further comprising an upper cover (10) sleeved on the periphery of the fixing tube (20); the inner tube wall (20a) and the upper cover ( 10) One-piece molding. The aerosol generating device according to claim 4, characterized in that, a plurality of bosses (312) are provided at intervals on the support wall (311); The second airflow channel (3112) communicates with the first airflow channel (213). The aerosol generating device according to claim 4, characterized in that, the support wall (311) is provided with a through hole (3111) through which the heating component (50) passes. The aerosol generating device according to claim 4, characterized in that, the heating assembly (50) comprises a heating element (50) that can pass through the support wall (311) and be inserted into the gas through the second opening (212). The sol forms the heating element (51) in the matrix (200). The aerosol generating device according to claim 15, characterized in that, the cross section of the fixing part (21) of the fixing tube (20) comprises a long axis and a short axis arranged across the long axis; the long axis Both ends of the shaft are provided with a first airflow channel (213) of the airflow channel; The heating element (51) is in the shape of a sheet, 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. The aerosol generating device according to claim 15, wherein the heating body (51) is cylindrical, and the heating body (51) comprises a cylindrical body (511) and a body (511) disposed on the body (511). A conical spire structure (512) at one end. The aerosol generating device according to claim 1, further comprising an upper cover (10) sleeved on the periphery of the fixing tube (20); the upper cover (10) is provided with the first cover (10). The opening (211) is correspondingly provided with a socket (11) for inserting the aerosol-forming substrate (200) into the fixing tube (20). The aerosol generating device according to claim 18, wherein the shape of the socket (11) is adapted to the cross-sectional shape of the fixing tube (20). The aerosol generating device according to claim 18, characterized in that, the socket (11) is provided with a guiding slope for guiding the insertion of the aerosol-forming substrate (200); The guide slope extends from the end face of the socket (11) away from one end of the fixing pipe (20) toward the fixing pipe (20).