EP4353096A1

EP4353096A1 - Aerosol generating device

Info

Publication number: EP4353096A1
Application number: EP22827347.0A
Authority: EP
Inventors: Yongbao YUAN
Original assignee: Shenzhen Merit Technology Co Ltd
Current assignee: Shenzhen Maishi Technology Co Ltd
Priority date: 2021-06-24
Filing date: 2022-06-01
Publication date: 2024-04-17
Also published as: KR20240042409A; WO2022267850A1; CN113508926A

Abstract

The present invention relates to an aerosol generating device, which includes a fixed tube for mounting an aerosol-forming substrate and forming an airflow channel. The fixed tube includes a support wall and a first opening facing the support wall for receiving the aerosol-forming substrate to be inserted. The airflow channel first extends from the first opening along the inner side of the tubular wall of the fixed tube in the direction toward the support wall to reach outside of the fixed tube, and then penetrates through the support wall into the fixed tube to extend in the direction toward the first opening, in order to allow a gas flow to move through the support wall to get into the aerosol-forming substrate to deliver aerosol generated with the aerosol-forming substrate outwards. The airflow channel of the aerosol generating device may cool the outer surface of the fixed tube, and the airflow channel has the advantages of uniform flow and sufficient flow.

Description

TECHNICAL FIELD

The present invention relates to a heat-not-burning (HNB) atomization device, and more particularly to an aerosol generating device.

BACKGROUND OF RELATED ART

In the related art, an aerosol generating device has a gas passage that is arranged in an interior of an outer housing in which aerosol is accommodated, and during the course of use, the gas passage only allows gas to get into an aerosol-forming substrate.

SUMMARY OF THE INVENTION

Technical Problem

An aerosol generating device in the related art has a gas passage that only allows gas to get into an aerosol-forming substrate and does not help cool down an outside surface of an outer housing and further, the gas flow in the gas passage is often non-uniform and insufficient.

RESOLUTION OF THE PROBLEM

Technical solution

The technical problem that the present invention aims to resolve is to provide an improved aerosol generating device.
The technical solution that the present invention adopts to resolve the technical problem is developing an aerosol generating device, which comprises a fixed tube for mounting an aerosol-forming substrate and forming an airflow channel;

the fixed tube comprising a support wall and a first opening arranged to correspond to the support wall for receiving the aerosol-forming substrate to be inserted;
the airflow channel first extending from the first opening along the inner side of the tubular wall of the fixed tube in the direction toward the support wall to reach the outside of the fixed tube, and then penetrating through the support wall into the fixed tube to extend in the direction toward the first opening, in order to allow a gas flow to move through the support wall to get into the aerosol-forming substrate to deliver aerosol generated with the aerosol-forming substrate outwards.

In some embodiments, the airflow channel comprises a first gas ingress channel; the first gas ingress channel is formed in the fixed tube and is in communication with outside through the first opening, and extends in the direction from the first opening towards the support wall.
In some embodiments, the airflow channel comprises a second gas ingress channel; the second gas ingress channel is formed on the outside of the support wall and in communication with the first gas ingress channel and the aerosol-forming substrate.
In some embodiments, the airflow channel comprises a second gas ingress channel;

the fixed tube comprises a second opening that is arranged to correspond to the first opening; the support wall is arranged between the first opening and the second opening;
the second gas ingress channel is formed between the support wall and the second opening and in communication with the first gas ingress channel and the aerosol-forming substrate.

In some embodiments, a gas inlet trough is formed on one side of the support wall that faces the second opening; the second gas ingress channel is formed in the gas inlet trough.
In some embodiments, a passage opening is formed on the trough wall of the gas inlet trough for communicating with the first gas ingress channel and the second gas ingress channel.
In some embodiments, the airflow channel comprises a connection channel in communication with the first gas ingress channel;
the connection channel is arranged on the tubular wall of the fixed tube.
In some embodiments, a through aperture is formed on the tubular wall of the fixed tube; the connection channel) is formed in the through aperture.
In some embodiments, the distance from the through aperture to the support wall is smaller than that from the through aperture to the first opening;
or, the distance from the through aperture to the support wall is greater than or equal to that from the through aperture to the first opening.
In some embodiments, the support wall is formed with a through hole to allow external gas to get into the aerosol-forming substrate.
In some embodiments, the fixed tube comprises a tubular body;

the tubular body is provided inside with a constraining structure for constraining the aerosol-forming substrate in position;
and/or, the tubular body is formed inside with an insertion channel for insertion of the aerosol-forming substrate; the insertion channel has a cross section that is of a circular shape, the radial size of the insertion channel corresponds to the external diameter of the aerosol-forming substrate of which the cross-section is of a circular shape.

In some embodiments, the constraining structure comprises a constraining rib protruding from the tubular wall of the tubular body.
In some embodiments, the constraining rib comprises multiple ones, and the multiple ones of constraining rib are arranged at intervals in the circumferential direction of the tubular body.
In some embodiments, the fixed tube comprises a tubular body, and the tubular body is formed inside with an insertion channel for insertion of the aerosol-forming substrate; the insertion channel has a cross section that is of an elliptic shape, the insertion channel having a major axis that is greater than the external diameter of the aerosol-forming substrate that has a cross-section of a circular shape, the insertion channel having a minor axis that corresponds to the external diameter of the aerosol-forming substrate of which the cross-section is of a circular shape.
In some embodiments, the aerosol generating device further comprises an outer housing sleeved around the outer periphery of the fixed tube;
the outer housing is of a structure that is hollow and has two penetrating ends.
In some embodiments, the fixed tube has a length that is greater than the length of the outer housing, and the two ends of the fixed tube are arranged to project out of the two ends of the outer housing.
In some embodiments, a through aperture is opened on the tubular wall of the fixed tube;
the outer housing is provided with a gas passage hole that is arranged to correspond to the through aperture.
In some embodiments, the aerosol generating device further comprises a heating assembly;

the fixed tube further comprises a second opening that is arranged to correspond to the first opening;
the heating assembly comprises a heating body; the heating body is inserted from the second opening through the support wall into the aerosol-forming substrate.

In some embodiments, the support wall is formed with a through hole, and the heating body is inserted from the through hole into the aerosol-forming substrate;
a gap is formed between the through hole and the heating body to allow the external gas to get into the aerosol-forming substrate.
In some embodiments, the heating body in the form of a plate and the through hole is an elongated hole;
the through hole has a length that is greater than the width of the heating body; or, the through hole has a width that is greater than the thickness of the heating body.
In some embodiments, an electrical power supply assembly is further included for electrically connecting with the heating assembly.
Implementation of the aerosol generating device according to the present invention provides the following advantages: the airflow channel of the aerosol generating device extending from the first opening of the fixed tube along an inner side of the tubular wall of the fixed tube in the direction toward the support wall to reach outside of the fixed tube, and then penetrating through the support wall into the fixed tube to extend in the direction toward the first opening, in order to allow a gas flow to move through the support wall to get into the aerosol-forming substrate to deliver aerosol generated with the aerosol-forming substrate out. The airflow channel may cool down an outer surface of the fixed tube, and the airflow channel has the advantages of uniform flow and sufficient flow.

BENEFICIAL EFFICACY OF THE INVENTION

Beneficial Efficacy

In some embodiments, an electrical power supply assembly is further included for electrically connecting with the heating assembly.
Implementation of the aerosol generating device according to the present invention provides the following advantages: the airflow channel of the aerosol generating device extending from the first opening of the fixed tube along an inner side of the tubular wall of the fixed tube in the direction toward the support wall to reach outside of the fixed tube, and then penetrating through the support wall into the fixed tube to extend in the direction toward the first opening, in order to allow a gas flow to move through the support wall to get into the aerosol-forming substrate to deliver aerosol generated with the aerosol-forming substrate out. The airflow channel may cool down an outer surface of the fixed tube, and the airflow channel has the advantages of uniform flow and sufficient flow.

BRIEF DESCRIPTION OF THE DRAWINGS

Description of the drawings

A detailed description of the present invention will be provided below with reference to the attached drawings and embodiments, and in the drawings:

FIG 1 is a schematic structure diagram showing an aerosol generating device according to a first embodiment of the present invention;
FIG 2 is a cross-sectional view of the aerosol generating device shown in FIG 1;
FIG 3 is an exploded view of a portion of the aerosol generating device shown in FIG 1;
FIG 4 is a cross-sectional view of a portion of the aerosol generating device shown in FIG 1;
FIG 5 is an exploded view of a portion of the aerosol generating device shown in FIG 4;
FIG 6 is a schematic structure diagram showing a fixed tube of the aerosol generating device shown in FIG 5;
FIG 7 is a schematic structure diagram, taken from a different angle, showing the fixed tube of the aerosol generating device shown in FIG 6;
FIG 8 is a schematic structure diagram showing a gas inlet trough of the fixed tube of the aerosol generating device shown in FIG 6;
FIG 9 is a schematic structure diagram showing an outer housing of the aerosol generating device shown in FIG 6;
FIG 10 is a schematic structure diagram showing a top cap of the aerosol generating device shown in FIG 6;
FIG 11 is a cross-sectional view of a portion of an aerosol generating device according to a second embodiment of the present invention; and
FIG 12 is a schematic structure diagram showing a fixed tube of an aerosol generating device according to a third embodiment of the present invention.

PREFERRED EMBODIMENTS OF THE PRESENT INVENTION

Best Ways for Implementing the Present Invention

For more clearly understanding the technical features, objectives, and effects of the present invention, embodiments of the present invention will be described with reference to the attached drawings.
It is noted that terms, such as "up", "down", "first", and "second", as used herein are applied for easy description of the technical solutions of the present invention and are not intended to indicate that a designated device or element must present a unique difference, and thus should not be construed as limiting to the present invention. It is noted that when an object is referred to as "connecting" to another object, it can be directly connected to said another object or there may be an intervening object simultaneously existing therewith. Unless otherwise specified, all the technical and scientific terminology used herein are literally similar to those that skilled artisans in the technical field to which the present invention belongs may understand. The terminology used in the specification of the present invention is employed for the purposes of describing specific embodiments and is not intended to impose limitation to the present invention.
FIGS. 1 and 2 show a first embodiment of an aerosol generating device according to the present invention. The aerosol generating device 100 employs a low-temperature heat-not-burning way to heat up an aerosol-forming substrate 200. In the instant embodiment, the aerosol-forming substrate 200 can be of a cylindrical form, and specifically, the aerosol-forming substrate 200 may be a fixed material in the form of filaments or flakes made of plant leaves and/or stems, and aromatic ingredients may be additionally included in the fixed material.
As shown in FIGS. 3-5, the aerosol generating device 100 may comprise a receptacle assembly 10. The receptacle assembly 10 is provided for receiving the aerosol-forming substrate 200 therein. In some embodiments, the receptacle assembly 10 comprises a fixed tube 11, an outer housing 12, and a top cap 13. The fixed tube 11 is disposed in the top cap 13 for mounting the aerosol-forming substrate 200 and forming an airflow channel 20. The outer housing 12 is sleeved over the outer circumference of the fixed tube 11 to connect and fix the fixed tube 11 to the top cap 13. The top cap 13 is sleeved around the outer periphery of the outer housing 12.
As shown in FIGS. 6-8, further, in the instant embodiment, the fixed tube 11 is of a hollow structure for receiving the aerosol-forming substrate 200 to insert therein. In some embodiments, the fixed tube 11 has a length that is greater than the length of the outer housing 12, and two ends of the fixed tube 11 are arranged to extend out of two ends of the outer housing 12. Of course, it is appreciated that in other embodiments, the length of the fixed tube 11 is not limited to being greater than the length of the outer housing 12.
Further, in the instant embodiment, the fixed tube 11 comprises a tubular body 111, a first opening 112, a second opening 113, and a support wall 114. The tubular body 111 is generally of a cylindrical configuration that has an interior formed as a hollow structure, and the interior defines an insertion channel 1110 to receive the aerosol-forming substrate 200 to insert therein. The insertion channel 1110 may be generally of a circular shape having a radial size that is generally corresponding to the external diameter of the aerosol-forming substrate 200. The first opening 112 is arranged at one end of the tubular body 111 and is in communication with the tubular body 111 for receiving entry of the aerosol-forming substrate 200 into the tubular body 111. The second opening 113 is arranged at an opposite end of the tubular body 111 and is opposite to the first opening 112, and is, specifically, arranged symmetric with respect to the first opening 112 in the axial direction and in communication with the tubular body 111. The support wall 114 is arranged in the interior of the tubular body 111 and is located between the first opening 112 and the second opening 113. The support wall 114 is generally of a circular shape and is coaxial with the first opening 112 and the second opening 113. The distance from the support wall 114 to the first opening 112 is greater than the distance from the support wall 114 to the second opening 113. The aerosol-forming substrate 200 is insertable in the direction from the first opening 112 toward the support wall 114 to get into the tubular body 111 and is withdrawable from the first opening 112.
Further, in the instant embodiment, a tubular wall of the fixed tube 11 is opened with a through aperture 115, and the through aperture 115 is formed in the tubular body 111 and located between the support wall 114 and the first opening 112. The through aperture 115 communicates between inner and outer sides of the fixed tube 11 to allow gas in the inner side of the fixed tube 11 to flow out of the fixed tube. In some embodiments, the through aperture 115 is arranged close to the support wall 114, meaning the distance from the through aperture 115 to the first opening 112 being greater than the distance to the support wall 114, and is located at one side of the support wall 114 that is opposite to the second opening 113. In some embodiments, specifically, the through aperture 115 abuts the support wall 114, and a distance from the through aperture 115 to the support wall 114 is generally zero so that the distance from the through aperture 115 to a second airflow channel 22 is reduced to thereby increase a gas flowing rate. Of course, it is appreciated that in other embodiments, the through aperture 115 may be arranged close to the first opening 112 and has a distance from the first opening 112 smaller than or equal to the distance from the support wall 114. In some embodiments, the through aperture 115 can be a square hole, and of course, it is appreciated that in other embodiments, the through aperture 115 is not limited to a square hole and can be a circular hole. In some embodiments, there may be two through apertures 115 provided, and the two through apertures 115 are arranged symmetric in a diametric direction of the fixed tube 11. Of course, it is appreciated that in other embodiments, the number of the through apertures 115 is not limited to two, and may be one or greater than two.
In the instant embodiment, one side of the support wall 114 that faces the second opening 113 is provided with a gas inlet trough 116, and the gas inlet trough 116 is defined and delimited by the tubular wall of one end of the tubular body 111 and the support wall 114 and is in communication with the second opening 113 and is also in communication with the through aperture 115. A trough wall of the gas inlet trough 116 is formed with a passage opening 1161, and the passage opening 1161 communicates the outside with the gas inlet trough 116. In some embodiments, the passage opening 1161 communicates the through aperture 115 with the gas inlet trough 116 to allow gas to get into the gas inlet trough 116.
In the instant embodiment, the support wall 114 is formed with a through hole 1141, and the through hole 1141 is in communication with the tubular body 111 and the gas inlet trough 116 and is arranged opposite to the second opening 113 to allow external gas to get into the aerosol-forming substrate 200. Specifically, the through hole 1141 allows gas in the gas inlet trough 116 to get into the fixed tube 11 so as to get into the aerosol-forming substrate 200 to bring aerosol generated with the aerosol-forming substrate 200 out. In some embodiments, the through hole 1141 may be provided to allow a heating body 32 of a heating assembly 30 to insert into the aerosol-forming substrate 200. In some embodiments, the through hole 1141 is an elongated hole, and of course, it is appreciated that in other embodiments, the through hole 1141 is not limited to an elongated hole and can be a circular hole or a square hole, and a cross-sectional shape of the heating body corresponding thereto can be circular or square.
Further, in the instant embodiment, the fixed tube 11 is provided inside with a constraining structure 117. Specifically, the constraining structure 117 is arranged in the interior of the tubular body 111 to constrain the aerosol-forming substrate 200 in position. In some embodiments, the constraining structure 117 may be arranged on the inner side of the tubular wall of the tubular body 11. Specifically, in some embodiments, the constraining structure 117 comprises a constraining rib 1171, and the constraining rib 1171 is in the form of a strip arranged to extend in the axial direction of the tubular body 111 and protruding from the tubular wall of the tubular body 111 to constrain the position of the aerosol-forming substrate 100 and the fixed tube 11 for preventing the aerosol-forming substrate 100 from shifting. In some embodiments, there are multiple ones of constraining rib 1171, and the multiple constraining ribs 1171 are arranged at intervals in the circumferential direction of the tubular body 111 for constraining the aerosol-forming substrate 100 in position and preventing the aerosol-forming substrate 100 from shifting. In some embodiments, by means of the arrangement of the constraining rib 1171, a gap is present between the aerosol-forming substrate 100 and the fixed tube 11 to form the airflow channel 20 to allow gas to easily flow.
Further, as shown in FIGS. 3-5, in the instant embodiment, the outer housing 12 is of a hollow structure having two open ends. The outer housing 12 has a cross section that is of a circular shape. The outer housing 12 has a diametric size that is slightly greater than the diametric size of the fixed tube 11. The outer housing 12 comprises a main body portion 121 that is sleeved around the outer circumference of the fixed tube 11 and a connection portion 122 arranged at one end of the main body portion 121 and detachably connected to the top cap 13. The main body portion 121 is of a tubular form and the inside wall of the main body portion 121 is provided with a positioning projection 1210 for constraining the fixed tube 11 in position in a radial direction. The positioning projection 1210 can be of an annular form having an inner diameter that corresponds to the external diameter of the fixed tube 11. In some embodiments, the outer housing 12 is formed with a gas passage hole 1211, and the gas passage hole 1211 is arranged to correspond to the through aperture 115 to allow gas to flow out from the through aperture 115. Specifically, in some embodiments, the gas passage hole 1211 can be arranged in the main body portion 121. In some embodiments, the connection portion 122 is of a tubular form having a diametric size slightly greater than the diametric size of the main body portion 121. The connection portion 122 is in fastening engagement with the top cap 13. In some embodiments, the connection portion 122 is provided, on an outside wall thereof, with snap fasteners 1221 that is snap-engageable with the top cap 13.
Further, in the instant embodiment, the receptacle assembly 10 further comprise an elastic member 14. The elastic member 14 is sleeved around the outer circumference of the fixed tube 11 and located between the fixed tube 11 and the outer housing 12 to provide an elastic cushioning effect to the fixed tube 11 when the aerosol-forming substrate 200 is being inserted into the fixed tube 11. In some embodiments, the elastic member 14 comprises a spring. The fixed tube 11 is provided, on the outside wall thereof, with a projecting flange 118 collaborative with the elastic member 14. The projecting flange 118 can be of an annular form and in fitting engagement with the elastic member 14.
As shown in FIG 4, further, in the instant embodiment, the airflow channel 20 is formed at the inner side and outer side of the fixed tube 11. In some embodiments, the airflow channel 20 first extends from the first opening 112 along the inner side of the tubular wall of the fixed tube 11 in the direction toward the support wall 114 to reach the outside of the fixed tube 11, and then penetrates through the support wall 114 into the fixed tube 11 to extend in the direction toward the first opening 112 so as to allow external gas to get into the aerosol-forming substrate 200 to deliver the aerosol generated with the aerosol-forming substrate 200 out. By means of extending the airflow channel 20 to the outside of the fixed tube 11, the outer surface of the fixed tube 11 can be cooled down and airflow in the airflow channel 20 is made more uniform and more abundant.
Specifically, in the instant embodiment, the airflow channel 20 comprises a first gas ingress channel 21, a second gas ingress channel 22, and a connection channel 23. The first gas ingress channel 21 is arranged in the interior of the fixed tube 11 and is formed of the gap between the tubular wall of the tubular body 111 and the aerosol-forming substrate 200. One end of the first gas ingress channel 21 is in communication with the first opening 112, namely in communication with the outside, to allow the external gas to enter. The first gas ingress channel 21 is extended in the direction from the first opening 112 toward the support wall 114 to reach to the through aperture 115 to be in communication with the through aperture 115. The second gas ingress channel 22 is formed between the support wall 114 and the second opening 113, namely formed in the interior of the gas inlet trough 116, and in communication with the first gas ingress channel 21 and the aerosol-forming substrate 200 to allow gas in the first gas ingress channel 21 to get into the aerosol-forming substrate 200. The connection channel 23 is arranged on the tubular wall of the fixed tube 11 and is formed in the through aperture 115 for communicating with the first gas ingress channel 21 and the second gas ingress channel 22. The second gas ingress channel 22 is made in communication with the passage opening 1161 so as to be in communication with the gas inlet trough 116, namely the passage opening 1161 communicating the first gas ingress channel 21 with the second gas ingress channel 22.
In other embodiments, the second opening 113 can be omitted, and the support wall 114 may serve as a bottom wall of the fixed tube 11. The second gas ingress channel 22 can be formed at an outer side of the support wall 114. Of course, it is appreciated that a gas inlet trough may be formed on the support wall 114 and facing toward the side of the fixed tube 11 that is opposite to the first opening 112 to form the second gas ingress channel 22.
Further, in the instant embodiment, the aerosol generating device 100 further comprises a heating assembly 30. The heating assembly 30 functions to heat up the aerosol-forming substrate 200. The heating assembly 30 comprises a fixing seat 31 and a heating body 32. The fixing seat 31 is arranged at one end of the fixed tube 11 that is provided with the second opening 113 for mounting the heating body 31. The heating body 32 is arranged on the fixing seat 31 and projects out of the fixing seat 31 and extends through the support wall 114 from the second opening 113 to insert into the aerosol-forming substrate 200. Specifically, the heating body 32 can be extended through the through hole 1141 to penetrate into the aerosol-forming substrate 200. In some embodiments, the heating body 32 is generally in the form of a plate and the heating body 32 has a width that can be smaller than a length of the through hole 1141 so as to form a gap with respect to a hole wall of the through hole 1141 to allow gas in the gas inlet trough 1161 to get into the aerosol-forming substrate 200. Of course, it is appreciated that in other embodiments, the width of the heating body 32 is not limited to being smaller than the length of the through hole 1141, and in other embodiments, the heating body 32 has a thickness that can be smaller than a width of the through hole 1141 so as to form a gap with respect to the hole wall of the through hole 1141 to allow gas in the gas inlet trough 1161 to get into the aerosol-forming substrate 200.
As shown in FIGS. 1 and 2, further, in the instant embodiment, the aerosol generating device 100 further comprises an electrical power supply assembly 40, and the electrical power supply assembly 40 is electrically connected with the heating assembly 30. Specifically, the electrical power supply assembly 40 is connected to the fixing seat 31 to supply electricity to the heating body 32. In some embodiments, the electrical power supply assembly 40 comprises a power source casing 41, a battery 42, a support frame 43, a tubular sheath 44, a gas flow detection device 45, and a main control board 46. The power source casing 41 is of a cylindrical form in which the battery 42, the support frame 43, the gas flow detection device 45, and the main control board 46 are received. The support frame 43 is arranged in the power source casing 41 to support the battery 42 and the main control board 46. The tubular sheath 44 is sleeved over the support frame 43 and extends out through an opening formed in an end of the power source casing 41 to penetrate into the receptacle assembly 10 to sleeve around an outer circumference of a portion of the outer housing 12 to connect and fix the receptacle assembly 10 and the electrical power supply assembly 40. The gas flow detection device 45 is arranged on the main control board 46 for activation of the heating assembly 30. The main control board 46 and the battery 42 are connected to the fixing seat 31 of the heating assembly 30 to allow the battery 42 to supply electricity to the heating assembly 30.
As shown in FIGS. 3, 9, and 10, further, in the instant embodiment, the tubular sheath 44 may comprises a sheath body 441, first positioning bump 442 arranged on the outside wall of the sheath body 441, and second positioning bump 443 arranged on the inside wall of the sheath body 441. The sheath body 441 has a cross section that is of a circular shape. There may be two first positioning bumps 441 provided, and the two first positioning bumps 441 are arranged on the outside wall of the sheath body 441 in a manner of being symmetric in a radial direction of the sheath body 441 for collaborating with the top cap 13 of the receptacle assembly 10 for position constraining. When the receptacle assembly 10 and the electrical power supply assembly 40 are being assembled together, the top cap 13 is set into snap engagement with the first positioning bump 441, and the top cap 13 is provided, on an inside wall thereof, with first positioning recesses 131 that collaborate with the first positioning bumps 441 for position constraining. Of course, it is appreciated that in other embodiments, the first positioning bumps 441 are not limited to being just two. There may be two second positioning bumps 443 provided, and the two second positioning bumps 443 are arranged on the inside wall of the sheath body 441 in a manner of being symmetric in a radial direction of the sheath body 44 for collaborating with the outer housing 12 for position constraining. When the receptacle assembly 10 and the electrical power supply assembly 40 are assembled together, the second positioning bumps 443 are set in snap engagement with the outer housing 12. When the sheath body 441 is being sleeved over the outer housing 12, the second positioning bumps 443 are snap fit into second positioning recesses 1212 formed in the outside wall of the outer housing 12. It is appreciated that in other embodiments, the second positioning bumps 443 are not limited to being just two.
FIG 11 shows a second embodiment of the aerosol generating device according to the present invention, which is different from the first embodiment in that the through aperture 115 is arranged close to the first opening 112 such that a distance thereof from the first opening 112 is smaller than or equal to a distance thereof from the support wall 114, and consequently, a distance from the through aperture 115 to the second gas ingress channel 22 on the support wall 114 is increased to thereby bring away more heat from the outer surface of the fixed tube.
FIG 12 shows a third embodiment of the aerosol generating device according to the present invention, which is different from the first embodiment in that the cross section of the fixed tube 11 is of an elliptic shape, and the interior of the tubular body 111 forms an insertion channel 1110 that is of an elliptic shape, and the constraining rib 1171 is omitted. The insertion channel 1110 has a minor axis having a length that is generally corresponding to the external diameter of the aerosol-forming substrate 200 in order to fix the aerosol-forming substrate 200, and the insertion channel 1110 has a major axis having a length that is greater than the external diameter of the aerosol-forming substrate 200. The first gas ingress channel 21 can be arranged at two ends of the major axis of the insertion channel 1110.
It is appreciated that the above embodiments describe only the preferred ways of implementation of the present invention, and description is made specific and detailed, but it should not be construed as limiting to the scope of the claims of the present invention. It is noted that for those having ordinary skill in the field, various modifications and improvements may be made without departing from the idea of the present invention by means of free combination of the above-described technical features, and these all belong to the scope of protection that the present invention pursues. Thus, equivalent substitution and modifications, which are made within the scope of the claims of the present invention, should be construed as falling within the scope of the claims of the present invention.

Claims

An aerosol generating device, characterized by comprising a fixed tube (11) for mounting an aerosol-forming substrate (200) and forming an airflow channel (20);
the fixed tube (11) comprising a support wall (114) and a first opening (112) arranged to correspond to the support wall (114) for receiving the aerosol-forming substrate (200) to be inserted;

the airflow channel (20) first extending from the first opening (112) along the inner side of the tubular wall of the fixed tube (11) in the direction toward the support wall (114) to reach the outside of the fixed tube (11), and then penetrating through the support wall (114) into the fixed tube (11) to extend in the direction toward the first opening (112), in order to allow a gas flow to move through the support wall (114) to get into the aerosol-forming substrate (200) to deliver aerosol generated by the aerosol-forming substrate (200) outwards.
The aerosol generating device according to claim 1, characterized in that the airflow channel (20) comprises a first gas ingress channel (21); the first gas ingress channel (21) is formed in the fixed tube (11) and is in communication with outside through the first opening (112), and extends in the direction from the first opening (112) toward the support wall (114).
The aerosol generating device according to claim 2, characterized in that the airflow channel (20) comprises a second gas ingress channel (22); the second gas ingress channel (22) is formed on the outside of the support wall (114) and in communication with the first gas ingress channel (21) and the aerosol-forming substrate (200).
The aerosol generating device according to claim 2, characterized in that the airflow channel (20) comprises a second gas ingress channel (22);
the fixed tube (11) comprises a second opening (113) that is arranged to correspond to the first opening (112); the support wall (114) is arranged between the first opening (112) and the second opening (113);

the second gas ingress channel (22) is formed between the support wall (114) and the second opening (113) and in communication with the first gas ingress channel (21) and the aerosol-forming substrate (200).
The aerosol generating device according to claim 4, characterized in that a gas inlet trough (116) is formed on one side of the support wall (114) that faces the second opening (113); the second gas ingress channel (22) is formed in the gas inlet trough (116).
The aerosol generating device according to claim 5, characterized in that a passage opening (1161) is formed on the trough wall of the gas inlet trough (116) for communicating with the first gas ingress channel (21) and the second gas ingress channel (22).
The aerosol generating device according to claim 2, characterized in that the airflow channel (20) comprises a connection channel (23) in communication with the first gas ingress channel (21);
the connection channel (23) is arranged on the tubular wall of the fixed tube (11).
The aerosol generating device according to claim 5, characterized in that a through aperture (115) is formed on the tubular wall of the fixed tube (11); the connection channel (23) is formed in the through aperture (115).
The aerosol generating device according to claim 8, characterized in that the distance from the through aperture (115) to the support wall (114) is smaller than that from the through aperture (115) to the first opening (112);
or, the distance from the through aperture (115) to the support wall (114) is greater than or equal to that from the through aperture (115) to the first opening (112).
The aerosol generating device according to claim 1, characterized in that the support wall (114) is formed with a through hole (1141) to allow external gas to get into the aerosol-forming substrate (200).
The aerosol generating device according to claim 1, characterized in that the fixed tube (11) comprises a tubular body (111);
the tubular body (111) is provided inside with a constraining structure (117) for constraining the aerosol-forming substrate (200) in position;

and/or, the tubular body (111) is formed inside with an insertion channel (1110) for insertion of the aerosol-forming substrate (200); the insertion channel (1110) has a cross section that is of a circular shape, the radial size of the insertion channel (1110) corresponds the external diameter of the aerosol-forming substrate (200) of which the cross-section is of a circular shape.
The aerosol generating device according to claim 11, characterized in that the constraining structure (117) comprises a constraining rib (1171) protruding from the tubular wall of the tubular body (111).
The aerosol generating device according to claim 12, characterized in that the constraining rib (1171) comprises multiple ones, and the multiple ones of constraining rib (1171) are arranged at intervals in the circumferential direction of the tubular body (111).
The aerosol generating device according to claim 1, characterized in that the fixed tube (11) comprises a tubular body (111), and the tubular body (111) is formed inside with an insertion channel (1110) for insertion of the aerosol-forming substrate (200); the insertion channel (1110) has a cross section that is of an elliptic shape, the insertion channel (1110) having a major axis that is greater than the external diameter of the aerosol-forming substrate (200) that has a cross-section of a circular shape, the insertion channel (1110) having a minor axis that corresponds to the external diameter of the aerosol-forming substrate (200) of which the cross-section is of a circular shape.
The aerosol generating device according to claim 1, characterized in that the aerosol generating device further comprises an outer housing (12) sleeved around the outer periphery of the fixed tube (11);
the outer housing (12) is of a structure that is hollow and has two penetrating ends.
The aerosol generating device according to claim 15, characterized in that the fixed tube (11) has a length that is greater than a length of the outer housing (12), and the two ends of the fixed tube (11) are arranged to project out of the two ends of the outer housing (12).
The aerosol generating device according to claim 16, characterized in that a through aperture (115) is defined on the tubular wall of the fixed tube (11);
the outer housing (12) is provided with a gas passage hole (1211) that is arranged to correspond to the through aperture (115).
The aerosol generating device according to claim 1, characterized in that the aerosol generating device further comprises a heating assembly (30);
the fixed tube (11) further comprises a second opening (113) that is arranged to correspond to the first opening (112);

the heating assembly (30) comprises a heating body (32) inserted from the second opening (113) through the support wall (114) into the aerosol-forming substrate (200);
The aerosol generating device according to claim 18, characterized in that the support wall (114) is formed with a through hole (1141), and the heating body (32) is inserted from the through hole (1141) into the aerosol-forming substrate (200);
a gap is formed between the through hole (1141) and the heating body (32) to allow the external gas to get into the aerosol-forming substrate (200).
The aerosol generating device according to claim 19, characterized in that the heating body (32) in the form of a plate and the through hole (1141) is an elongated hole;
the through hole (1141) has a length that is greater than a width of the heating body (32); or, the through hole (1141) has a width that is greater than a thickness of the heating body (32).