CN113729287A

CN113729287A - Guide member, heating unit, and aerosol generating device

Info

Publication number: CN113729287A
Application number: CN202111052511.4A
Authority: CN
Inventors: 沈丕发; 何丹充; 邢凤雷
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-12-03
Also published as: KR20230036956A; JP2023039405A; WO2023035852A1

Abstract

The invention relates to a guide member, a heating assembly and an aerosol generating device, wherein an introduction cavity for introducing an aerosol generating substrate is formed in the guide member, the introduction cavity is provided with a first end and a second end which are arranged oppositely, the cross section shapes of the first end and the second end are different, and the cross section area of the second end of the introduction cavity is smaller than that of the first end. The ingression lumen transitions from the first end to the second end. The guide member is capable of smoothly guiding the aerosol-generating substrate into the heating assembly for heating.

Description

Guide member, heating unit, and aerosol generating device

Technical Field

The invention relates to the field of atomization, in particular to a guide component, a heating assembly and an aerosol generating device.

Background

The heating non-combustion type atomizer is an aerosol generator which heats an atomizing material to form an aerosol which can be sucked by a low-temperature heating non-combustion method. Currently, the heating mode of the aerosol generating device is generally tubular peripheral heating or central embedded heating. Wherein, tubular peripheral heating means that the heating tube surrounds the aerosol generating substrate. The existing heating tube is generally designed into a hollow round tube shape, and after the aerosol generating substrate is inserted, the circle of the outline of the cross section of the aerosol generating substrate is coincident with or tangent to the circle of the inner wall of the heating tube. The aerosol-generating substrate is typically aligned and then inserted into the heating tube for heating, and when the aerosol-generating substrate has a cross-sectional shape that is different from the cross-sectional shape of the heating tube, it is difficult to insert the aerosol-generating substrate into the heating tube.

Disclosure of Invention

The present invention is directed to solving the above-mentioned problems of the prior art, and provides an improved guiding member, a heating assembly having the guiding member, and an aerosol generating apparatus having the guiding member.

The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a guide member for a heating assembly of an aerosol-generating device, the guide member having an introduction chamber formed therein for introducing an aerosol-generating substrate, the introduction chamber having first and second oppositely disposed ends, the first and second ends having different cross-sectional shapes, the second end of the introduction chamber having a cross-sectional area less than the cross-sectional area of the first end, and the introduction chamber being a gradual transition from the first end to the second end.

In some embodiments, the cross-sectional area of the second end of the introduction chamber is less than or equal to the cross-sectional area of the aerosol-generating substrate to be introduced.

In some embodiments, the second end of the ingression lumen is non-circular in cross-sectional shape.

In some embodiments, the second end of the ingression lumen is polygonal in cross-sectional shape.

In some embodiments, the polygon comprises a regular polygon or a lyocell polygon.

In some embodiments, the cross-sectional shape of the first end of the introduction chamber matches the cross-sectional profile of the aerosol-generating substrate to be introduced.

In some embodiments, the cross-sectional area of the first end of the introduction chamber is greater than the cross-sectional area of the aerosol-generating substrate to be introduced.

In some embodiments, the first end of the ingression lumen is circular or polygonal in cross-sectional shape.

In some embodiments, a transition chamber is also formed in the guide member, the transition chamber communicating with the second end of the ingression lumen.

In some embodiments, the transition chamber has a cross-sectional shape that matches a cross-sectional shape of the second end of the ingression lumen.

In some embodiments, an open cavity is also formed in the guide member, the open cavity communicating with the first end of the ingression lumen.

In some embodiments, the cross-sectional shape of the open cavity of the introduction chamber matches the cross-sectional profile of the aerosol-generating substrate to be introduced.

In some embodiments, the open lumen has a cross-sectional area greater than or equal to the cross-sectional area of the first end of the ingression lumen.

In some embodiments, the guide member is injection molded from a high molecular polymer.

The invention also provides a heating assembly comprising a heating tube and a guide member as defined in any preceding claim connected to the heating tube, the heating tube having a heating cavity formed therein for receiving the aerosol-generating substrate, the heating cavity being in communication with the second end of the introduction chamber.

In some embodiments, at least part of the chamber wall of the heating chamber is capable of squeezing the aerosol-generating substrate; the cross-sectional profile of the heating chamber has a maximum inscribed circle having a diameter which is smaller than the outer diameter of the aerosol-generating substrate before it is extruded in a state in which the heating chamber contains the aerosol-generating substrate.

In some embodiments, at least one air flow passage is also formed between the outer wall surface of the aerosol-generating substrate and the wall of the heating chamber in a state in which the heating chamber contains the aerosol-generating substrate.

The invention also provides an aerosol generating device comprising a heating assembly as described in any of the above.

The implementation of the invention has at least the following beneficial effects: the guiding member is configured and arranged to smoothly guide the aerosol-generating substrate into the heating unit for heating.

Drawings

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

FIG. 1 is a perspective view of a heating element according to a first embodiment of the present invention;

figure 2 is a schematic transverse cross-sectional view of the heating assembly of figure 1 containing an aerosol-generating substrate;

FIG. 3 is a schematic longitudinal cross-sectional view of the heating assembly shown in FIG. 1;

FIG. 4 is a schematic cross-sectional profile of the heating chamber of FIG. 1;

FIG. 5 is a perspective view of a heating element according to a second embodiment of the present invention;

FIG. 6 is a schematic longitudinal cross-sectional view of the heating assembly shown in FIG. 5;

fig. 7 is a schematic cross-sectional profile view of a heating cavity of a heating element according to a third embodiment of the present invention;

fig. 8 is a schematic cross-sectional contour view of a heating cavity of a heating element in accordance with a fourth embodiment of the present invention;

fig. 9 is a schematic cross-sectional contour view of a heating cavity of a heating element in a fifth embodiment of the present invention;

fig. 10 is a schematic cross-sectional contour view of a heating cavity of a heating element in a sixth embodiment of the present invention;

fig. 11 is a schematic cross-sectional contour view of a heating chamber of a heating module according to a seventh embodiment of the present invention;

FIG. 12 is a schematic longitudinal sectional view of a heating element according to an eighth embodiment of the present invention;

FIG. 13 is a schematic perspective view of a heating element in a ninth embodiment of the present invention;

figure 14 is a schematic transverse cross-sectional view of the heating assembly of figure 13 containing an aerosol generating substrate;

figure 15 is a schematic perspective view of a heating element according to a tenth embodiment of the invention incorporating an aerosol generating substrate;

FIG. 16 is a schematic longitudinal cross-sectional view of the heating assembly of FIG. 15;

FIG. 17 is an exploded view of the heating assembly of FIG. 15;

figure 18 is a schematic perspective view of an aerosol-generating device according to some embodiments of the invention inserted with an aerosol-generating substrate;

figure 19 is a schematic longitudinal cross-sectional view of the aerosol-generating device of figure 18 inserted with an aerosol-generating substrate.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings or the orientations and positional relationships that the products of the present invention will ordinarily place when in use, and are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

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

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

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

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

Fig. 1 to 4 show a heating assembly 1 according to a first embodiment of the present invention, and the heating assembly 1 may be heated by resistive conduction heating, electromagnetic heating, infrared radiation heating, composite heating, or the like. The heating assembly 1 comprises a heating tube 12, the heating tube 12 being hollow and tubular, an inner wall surface of the heating tube 12 defining a heating chamber 120 for receiving and heating the aerosol-generating substrate 200.

The cross-section of the heating chamber 120 may be a non-circular polygon including, but not limited to, a triangle, a square, a trapezoid, a pentagon, etc. Preferably, the cross-section of the heating chamber 120 is an axisymmetric polygon, and further, the cross-section of the heating chamber 120 is a regular polygon or a lyocell polygon. The cross-sectional profile C of the heating chamber 120 has a maximum inscribed circle C1 having a diameter 2R that is smaller than the outer diameter of the aerosol-generating substrate 200 prior to being extruded. In some embodiments, the diameter of the largest inscribed circle may be 0.2-2.0mm smaller than the outer diameter of the aerosol-generating substrate 200 before being extruded. In some embodiments, the diameter 2R of the maximum inscribed circle C1 may be 3-9mm, such as 4mm, preferably 5-7 mm. Upon insertion of the aerosol-generating substrate 200 into the heating chamber 120, at least part of the chamber wall of the heating chamber 120 is able to compress the aerosol-generating substrate 200, causing the aerosol-generating substrate 200 to deform radially inwardly. It will be appreciated that the greater the number of edges of the cross-sectional profile of the heating chamber 120, the closer the cross-sectional profile of the heating chamber 120 approaches a circle. In order to provide some compression of the aerosol-generating substrate 200, the cross-sectional profile of the heating chamber 120 should not have too many edges, which in some embodiments may be 3-7.

The maximum distance L from the center of the maximum inscribed circle C1 to the cross-sectional profile line C of the heating chamber 120 is greater than the radius R of the maximum inscribed circle C1. In some embodiments, the maximum distance L from the center of the maximum inscribed circle C1 to the cross-sectional profile C of the heating cavity 120 may be greater than 2mm, preferably 3-5 mm. When the aerosol generating substrate 200 is received in the heating chamber 120, at least one airflow channel 121 is formed between the outer wall surface of the aerosol generating substrate 200 and the wall surface of the heating chamber 120, and the at least one airflow channel 121 may extend in the axial direction of the heating chamber 120, thereby ensuring smooth airflow during smoking.

Specifically, in the present embodiment, the heating pipe 12 is a regular triangular pipe, that is, the cross-sectional outer contour and the inner contour of the heating pipe 12 are both substantially regular triangular prisms. The cross-sectional contour line C of the heating chamber 120, i.e., the cross-sectional inner contour line of the heating pipe 12, has a substantially regular triangular prism shape having three straight edges C2. The junction of every two straight edges C2 of the cross-sectional contour C of the heating chamber 120 may be provided with a rounded corner C3, which improves the smoothness of the junction by appropriate chamfering.

The external cross-sectional shape of the heating tube 12 corresponds to the cross-sectional shape of the heating chamber 120, i.e. the external cross-sectional shape of the heating tube 12 is also substantially a regular triangular prism with a circular transition. In other embodiments, the external cross-sectional shape of the heating tube 12 may also be different from the cross-sectional shape of the heating cavity 120, for example, the external cross-sectional shape of the heating tube 12 may also be circular or other shapes.

The aerosol-generating substrate 200 is inserted into the heating tube 12 while being pressed radially inward by the heating tube 12 into a triangular shape similar to the cross-sectional shape of the heating chamber 120. Figure 2 shows a cross-sectional view of a generally cylindrical aerosol-generating substrate 200 when housed within the heating tube 12, wherein the dotted lines indicate the outer cross-sectional profile of the aerosol-generating substrate 200 before extrusion. After the aerosol-generating substrate 200 is crushed and deformed, the radial surface-to-center distance is reduced, thereby shortening the heat transfer distance. Meanwhile, the air inside the aerosol-generating substrate 220 of the aerosol-generating substrate 200 is extruded and discharged, and the density of the aerosol-generating substrate 220 is increased, so that the heat conduction efficiency can be improved, and the problems of large surface temperature difference, low heat conduction efficiency and long preheating time of the aerosol-generating substrate 200 are solved.

When the aerosol-generating substrate 200 is received in the heating tube 12, three air flow passages 121 may be formed between the outer wall surface of the aerosol-generating substrate 200 and the wall surface of the heating chamber 120, and the three air flow passages 121 are located at the junctions of each two edges of the heating chamber 120.

As shown in fig. 3, in the present embodiment, the heating element 1 is heated by pure resistance conduction heating, and the heating element 1 further includes a heating element 123 which is disposed on the surface of the heating tube 12 and can generate heat after being electrified. The heating element 123 may be a heating film, a heating wire, a heating sheet or a heating net. Specifically, in the present embodiment, the heating element 123 is a resistance heating film and may be disposed on the outer surface of the heating tube 12. The heating element 123 generates heat after being energized, and transfers the generated heat from the outer surface of the heating tube 12 to the aerosol-generating substrate 200 housed in the heating tube 12, thereby heating the aerosol-generating substrate 200.

The heating tube 12 can be made of metal or non-metal material with high heat conductivity coefficient, which is beneficial to the rapid heat transfer, and the uniformity of the temperature field of the heating tube 12 is good under the rapid temperature rise. Wherein the higher thermal conductivity metal material may comprise stainless steel, aluminum or an aluminum alloy. The higher thermal conductivity non-metallic material may comprise a ceramic, such as alumina, silicon carbide, aluminum nitride, silicon nitride, and the like.

The inner surface of the heating tube 12 may also be provided with a soaking film 122, and the soaking film 122 is disposed around the inner surface of the heating tube 12 and at least partially disposed in the length direction (axial direction) of the heating tube 12. The soaking film 122 may be made of a high thermal conductive material such as copper or silver, and is used to make the temperature field of the inner surface of the heating tube 12 uniform, thereby achieving uniform heating of the aerosol-generating substrate 200. In some embodiments, the soaking film 122 may be disposed corresponding to the high temperature zone of the heating element 123 and may be disposed corresponding to the aerosol-generating substrate 220 of the aerosol-generating substrate 200. Specifically, the soaking film 122 overlaps or at least partially overlaps with the high-temperature zone of the heating body 123 and the atomization substrate 220 in the length direction of the heating tube 12. The high temperature region of the heating element 123 is generally a region in which the heat generation trajectory is densely distributed, and the region generates more heat and has a higher temperature after the heating element 123 is energized. The soaking film 122 is arranged corresponding to the high-temperature zone of the heating element 123 and the atomization substrate 220, so that the heat of the high-temperature zone of the heating element 123 can be rapidly transferred to the soaking film 122 and uniformly distributed on the soaking film 122, and the atomization substrate 220 can be uniformly heated. It is understood that in other embodiments, the soaking film 122 may also be disposed on the outer surface of the heating tube 12, for example, the soaking film 122 may also be disposed between the resistive heating film and the outer surface of the heating tube 12.

Fig. 5-6 show a heating assembly 1 according to a second embodiment of the invention, which differs from the first embodiment mainly in that the heating assembly 1 according to the present embodiment further comprises a guiding member 11 at the upper part of the heating tube 12 for guiding the aerosol-generating substrate 200 and a support wall 13 covering the bottom of the heating tube 12 for axial supporting positioning of the aerosol-generating substrate 200. The guide member 11, the heating pipe 12, and the support wall 13 may be integrally formed, or may be separately formed and assembled together.

Specifically, in the present embodiment, the supporting wall 13 covers the lower opening of the heating tube 12, and may be integrally formed with the heating tube 12. The inner side wall of the heating tube 12 and/or the upper side wall of the support wall 13 may also be provided with at least one limiting boss 14 for limiting the aerosol-generating substrate 200. The at least one limiting projection 14 and the heating tube 12 and/or the support wall 13 may be integrally formed, or they may be separately formed and then assembled together by welding or the like. In the present embodiment, there is one limiting projection 14, and the one limiting projection 14 may be integrally formed by bending the supporting wall 13 upward and may coincide with the central axis of the supporting wall 13. The top surface of the retaining boss 14 is planar and the lower end surface of the aerosol-generating substrate 200 may be supported and positioned against the at least one retaining boss 14. In other embodiments, there may be two or more limiting bosses 14, and the two or more limiting bosses 14 may be distributed on the periphery of the supporting wall 13 and may be uniformly spaced along the circumference of the supporting wall 13.

The guide member 11 is tubular with a hollow interior, and the inner wall surface of the guide member 11 defines an introduction chamber 110 for introducing the aerosol-generating substrate 200. The introduction chamber 110 has a first end 111 distal to the heating tube 12 and a second end 112 proximal to the heating tube 12. The ingression lumen 110 has a cross-section A and a cross-section B at the first end 111 and the second end 112, respectively, with the cross-sectional area of the cross-section B being less than the cross-sectional area of the cross-section A. The cross-sectional area of the cross-section a is not less than the cross-sectional area of the aerosol-generating substrate 200 before it is extruded, and preferably is greater than the cross-sectional area of the aerosol-generating substrate 200 before it is extruded, facilitating smooth introduction of the aerosol-generating substrate 200 into the heating assembly 1. The cross-sectional shape of the cross-section a may correspond to the cross-sectional shape of the aerosol-generating substrate 200 before it is extruded, in this embodiment the aerosol-generating substrate 200 is cylindrical and the cross-sectional shape of the cross-section a is circular. In other embodiments, the cross-sectional shape of the cross-section a may also be different from the cross-sectional shape of the aerosol-generating substrate 200, for example, the cross-sectional shape of the cross-section a may also be non-circular, including polygonal, such as triangular, square, trapezoidal, etc.

The cross-sectional shape of the cross-section B matches the cross-sectional shape of the heating chamber 120 and is different from the cross-sectional shape of the cross-section a. In the present embodiment, the cross section B has a substantially regular triangular prism shape with a circular transition. In this embodiment, the second end 112 of the introduction chamber 110 is connected to the upper end of the heating chamber 120, and the cross-sectional size of the second end 112 of the introduction chamber 110 is identical to the cross-sectional size of the heating chamber 120. In other embodiments, the cross-sectional dimension of the second end 112 of the introduction chamber 110 may also be smaller than the cross-sectional dimension of the heating chamber 120. The introduction chamber 110 may have a smooth transition from the first end 111 to the second end 112, i.e., the cross-section of the introduction chamber 110 is gradually changed from a circular shape at the first end 111 to a regular triangular shape corresponding to the cross-section of the heating tube 12, and is engaged with the heating tube 12. The aerosol-generating substrate 200 is smoothly inserted into the heating tube 12 via the guiding function of the guiding member 11 while being pressed radially inward by the heating tube 12 into a triangular shape similar to the cross-sectional shape of the heating chamber 120.

The outer cross-sectional shape of the guide member 11 may correspond to the cross-sectional shape of the introduction chamber 110, and specifically, in the present embodiment, the outer cross-sectional shape of the guide member 11 is gradually changed from a circular shape at the upper end to a regular triangular shape at the lower end. In other embodiments, the outer cross-sectional shape of the guide member 11 may also be different from the cross-sectional shape of the ingression lumens 110.

In addition, the heating assembly 1 in this embodiment may adopt a heating method of resistance conduction and infrared radiation combined heating, and the heating assembly 1 further includes an infrared radiation heat-generating film 125 disposed on the surface of the heating pipe 12. The heating element 123 may be disposed on the outer surface of the heating tube 12, and the two electrode leads 124 may be welded to the outer surface of the bottom of the heating tube 12 respectively and are welded to the heating element 123. The infrared radiation heating film 125 may be disposed on the inner surface of the heating pipe 12. The heating tube 12 may be made of a metal or non-metal material with a high thermal conductivity, and the uniformity of the temperature field of the heating tube 12 is good at a fast temperature rise. Wherein the high thermal conductivity metal material may include stainless steel, aluminum or an aluminum alloy. The high thermal conductivity non-metallic material may include ceramics such as alumina, silicon carbide, aluminum nitride, silicon nitride, and the like. In other embodiments, the infrared radiation heating film 125 can also be disposed on the outer surface of the heating tube 12, and in this case, the heating tube 12 can be made of quartz or the like with high infrared transmittance.

In other embodiments, the heating assembly 1 may also adopt a heating mode of only infrared radiation heating, that is, the surface of the heating tube 12 is only provided with the infrared radiation heating film 125, and is not provided with the heating body 123. The infrared radiation heating film 125 can be disposed on the inner surface of the heating tube 12, and at this time, the heating tube 12 can be made of a metal or non-metal material with high temperature resistance and low thermal conductivity. Alternatively, the infrared radiation heating film 125 can be disposed on the outer surface of the heating tube 12, and in this case, the heating tube 12 can be made of quartz or other materials with low thermal conductivity and high infrared transmittance.

Fig. 7 shows a schematic diagram of a cross-sectional contour C of the heating cavity 120 in the third embodiment of the present invention, which is different from the first embodiment mainly in that the cross-sectional contour C of the heating cavity 120 in this embodiment is in a regular triangular prism shape, and every two straight edges are directly connected with each other, i.e., no chamfer is performed at the junction of every two straight edges.

Fig. 8 shows a schematic diagram of a cross-sectional contour C of a heating cavity 120 according to a fourth embodiment of the present invention, which is different from the first embodiment mainly in that the cross-sectional contour C of the heating cavity 120 is a regular quadrilateral and each two adjacent edges are directly connected with each other.

Fig. 9 is a schematic diagram illustrating a cross-sectional contour C of a heating cavity 120 according to a fifth embodiment of the present invention, which is different from the first embodiment mainly in that the cross-sectional contour C of the heating cavity 120 is a regular quadrilateral, and every two adjacent edges are connected by a circular arc transition.

Fig. 10 shows a schematic diagram of a cross-sectional contour C of a heating cavity 120 in a sixth embodiment of the present invention, which is different from the first embodiment mainly in that the cross-sectional contour C of the heating cavity 120 in this embodiment is a regular hexagon, and every two adjacent edges are directly connected with each other.

Fig. 11 shows a schematic diagram of a cross-sectional contour C of a heating chamber 120 according to a seventh embodiment of the present invention, which is different from the first embodiment mainly in that the cross-sectional contour C of the heating chamber 120 in this embodiment is a leilo polygon having an odd number of arc-shaped sides. The odd number of arcuate surfaces of the heating chamber 120 have a greater contact area with the aerosol-generating substrate 200. Specifically, in the present embodiment, the cross-sectional contour C is a reuleaux triangle. In other embodiments, the cross-sectional profile C may also be in the shape of a lyocell pentagon, a heptagon, or the like.

Fig. 12 shows a heating assembly 1 according to an eighth embodiment of the invention, which differs from the second embodiment mainly in that in this embodiment a lead-in cavity 110 and a transition cavity 113 communicating axially with the lead-in cavity 110 are formed in the guide member 11. The introduction chamber 110 has a second end 112 proximate to the heating tube 12 and a first end 111 distal to the heating tube 12. The ingression lumen 110 has a cross-section A and a cross-section B at the first end 111 and the second end 112, respectively, with the cross-sectional area of cross-section A being greater than the cross-sectional area of cross-section B. The cross-sectional shape of the cross-section B of the introduction chamber 110 matches the cross-sectional shape of the heating chamber 120, and the cross-sectional area of the cross-section B is less than or equal to the cross-sectional area of the heating chamber 120.

The upper end of the transition chamber 113 communicates with the second end 112 of the ingression lumen 110. the upper end of the transition chamber 113 has a cross-sectional shape and size that is compatible with the cross-sectional shape and size of the second end 112 of the ingression lumen 110. The lower end of the transition chamber 113 communicates with the upper end of the heating chamber 120, and the cross-sectional shape and size of the lower end of the transition chamber 113 may be adapted to the cross-sectional shape and size of the upper end of the heating chamber 120.

Fig. 13-14 show a heating module 1 according to a ninth embodiment of the invention, which differs from the second embodiment mainly in that in this embodiment the cross-section of the heating chamber 120 is racetrack circular with the largest inscribed circle having a diameter corresponding to the length of the minor axis of the racetrack circular cross-section. When the aerosol-generating substrate 200 is received in the heating chamber 120, two air flow passages 121 may be formed between the outer wall surface of the aerosol-generating substrate 200 and the wall surface of the heating chamber 120, the two air flow passages 121 being located on either side of the long axis of the heating chamber 120. It will be appreciated that in other embodiments the cross-section of the heating chamber 120 may be other non-circular shapes, preferably axisymmetric non-circular shapes.

Accordingly, the cross-sectional shape of the second end 112 of the introduction chamber 110 communicating with the heating chamber 120 is a racetrack circle conforming to the cross-sectional shape of the heating chamber 120, and the cross-sectional dimension of the second end 112 of the introduction chamber 110 conforms to the cross-sectional dimension of the heating chamber 120. The cross-sectional shape of the first end 111 of the ingression lumen 110 may be circular and the cross-sectional shape of the ingression lumen 110 tapers from the circular shape of the first end 111 to a racetrack circular shape of the second end 112.

In addition, in the present embodiment, the heating module 1 may further have a plurality of through holes 10 communicating with the heating cavity 120. The through hole 10 may be opened at any position of the heating element 1 as required. For example, the through-hole 10 may be opened in the side wall of the guide member 11 and/or the heating pipe 12, and/or the through-hole 10 may be opened in the support wall 13 and/or the limit projection 14. The shape, size and number of the through-holes 10 are not limited.

Fig. 15 to 17 show a heating module 1 according to a tenth embodiment of the present invention, wherein the heating module 1 may include a heating tube 12, a guiding member 11 disposed at the top of the heating tube 12, a supporting wall 13 disposed at the bottom of the heating tube 12, and an outer tube 16 sleeved outside the heating tube 12. The guide member 11, the heating pipe 12, the support wall 13, and the outer pipe 16 are individually molded and then assembled together.

Specifically, the heating pipe 12 is a regular triangular pipe, and the axial length of the heating pipe 12 may be 25-31 mm. The inner wall surface of the heating tube 12 defines a heating chamber 120 for receiving and heating the aerosol-generating substrate 200, the heating chamber 120 having a regular triangular cross-section with circular arc transition connections between the three edges. The cross-sectional profile of the heating chamber 120 has a maximum inscribed circle having a diameter that is less than the outer diameter of the aerosol-generating substrate 200 prior to being extruded. Upon insertion of the aerosol-generating substrate 200 into the heating chamber 120, at least part of the chamber wall of the heating chamber 120 is able to compress the aerosol-generating substrate 200, causing the aerosol-generating substrate 200 to deform radially inwardly.

The heating tube 12 may be made of a metal or non-metal material having high thermal conductivity. The outer wall surface of the heating tube 12 may be provided with a heat generating component 17, the heat generating component 17 including a heat generating body and/or a circuit board. In the present embodiment, the heat generating component 17 includes a flexible circuit board and a thick film heat generating body provided on the flexible circuit board. In other embodiments, the heat generating component 17 may also include only a heat generating body, which may be a heat generating film, a heat generating sheet, a heat generating wire, or the like, or a circuit board, which may be a flexible circuit board or a rigid circuit board.

The guide member 11 may be formed by injection molding of a high-temperature-resistant polymer, such as PEEK (polyetheretherketone), nylon, or the like. The guide member 11 may include a body portion 115, an end wall 116 extending outwardly from an outer wall surface of the body portion 115, and an annular wall 117 extending downwardly from the end wall 116. The inner wall surface of the body portion 115 defines an open cavity 114 and an introduction cavity 110. The cross-sectional shape of the open cavity 114 may match the cross-sectional shape of the aerosol-generating substrate 200 before it is extruded, in this embodiment the cross-sectional shape of the open cavity 114 is circular. The cross-sectional area of the open cavity 114 may be greater than or equal to the cross-sectional area of the aerosol-generating substrate 200 prior to extrusion. The introduction chamber 110 has a first end 111 distal to the heating tube 12 and a second end 112 proximal to the heating tube 12. The first end 111 of the introduction chamber 110 communicates with the lower end of the open chamber 114, and the cross-sectional shape of the introduction chamber 110 at the first end 111 may match the cross-sectional shape of the open chamber 114. The cross-sectional area of the ingression lumen 110 at the first end 111 may be less than or equal to the cross-sectional area of the open lumen 114.

The ingression lumen 110 has a cross-sectional area at its second end 112 that is smaller than the cross-sectional area at its first end 111. The second end 112 of the introduction chamber 110 communicates with the upper end of the heating chamber 120, and the cross-sectional shape and area of the second end 112 of the introduction chamber 110 matches the cross-sectional shape and area of the heating chamber 120. The ingression lumen 110 may take the form of a gradual transition from the first end 111 to the second end 112, i.e., the cross-sectional shape of the ingression lumen 110 gradually changes from a circular shape at the first end 111 to a regular triangular shape at the second end 112. The external cross-sectional shape of body portion 115 may match the cross-sectional shape of ingression lumens 110.

End wall 116 may be formed by extending radially outward from the intersection of first end 111 and second end 112 of body portion 115. An annular wall 117 may be closely nested in the upper end opening of the outer tube 16, which may be formed by an outer ring of the end wall 116 extending vertically downward. The annular wall 117 may have a circular cross-section, and an annular receiving space for receiving the first heat insulator 155 is formed between an inner wall surface of the annular wall 117 and an outer wall surface of the body portion 115.

The supporting arm 13 can be embedded in the lower opening of the heating tube 12, and can be made of metal or non-metal material with high thermal conductivity. The middle part of the supporting arm 13 is bent upwards to form a limiting boss 14, and the lower end surface of the aerosol generating substrate 200 can abut against the limiting boss 14 to realize supporting and positioning.

The outer tube 16 may be tubular and may be formed of a high thermal conductivity metal, including stainless steel, copper alloy, aluminum alloy, etc., preferably 430 stainless steel, copper or copper alloy. Alternatively, the outer tube 16 may be made of non-metallic materials such as ceramic with high thermal conductivity, including aluminum oxide, silicon carbide, aluminum nitride, silicon nitride, etc. The outer tube 16 is made of high heat conduction material, which is beneficial to uniform heating of the heating component 1.

Furthermore, the heating assembly 1 in the present embodiment may further include an insulation assembly 15 disposed between the outer tube 16 and the heating tube 12. The heat insulation assembly 15 may include a first heat insulation layer 151, a second heat insulation layer 152, a third heat insulation layer 153, and a heat dissipation layer 154 sequentially disposed outside the heating pipe 12. The material of the first and third thermal insulation layers 151 and 153 may be one or any combination of aerogel, asbestos, glass fiber, polyetheretherketone, imide, polyetherimide or ceramic, and preferably is aerogel. The material of the heat dissipation layer 154 may be a graphite sheet or a graphene sheet.

The second insulation layer 152 may be a vacuum tube. The insulation assembly 15 may also include first and

second insulation members

155 and 156 disposed at respective axial ends of the vacuum tube. The first and second

thermal insulators

155 and 156 may be made of a low thermal conductive material, preferably an elastic material having a low thermal conductivity such as silicon gel. The high-temperature regions at the two ends of the vacuum tube are respectively wrapped by the first heat insulation piece 155 and the second heat insulation piece 156, so that the functions of heat insulation and sealing are realized. It is understood that in other embodiments, the thermal insulation assembly 15 may also be composed of only one or more of the first thermal insulation layer 151, the second thermal insulation layer 152, the third thermal insulation layer 153, and the heat dissipation layer 154, and the relative position relationship between the first thermal insulation layer 151, the second thermal insulation layer 152, the third thermal insulation layer 153, and the heat dissipation layer 154 may also be adjusted as needed, for example, the heat dissipation layer 154 may also be disposed between the first thermal insulation layer 151 and the second thermal insulation layer 152.

In this embodiment, the heating assembly 1 may further include a base 18 embedded in the bottom of the outer tube 16. The base 18 may be made of a high temperature resistant material such as PEEK, and may be tightly fitted between the inner wall surface of the outer tube 16 and the outer wall surface of the second thermal insulation member 156.

Furthermore, the heating assembly 1 may further comprise a temperature detecting element 19, wherein the temperature detecting element 19 may be disposed at the bottom of the support arm 13, and may detect the temperature of the bottom of the aerosol generating substrate 200, and may also detect the number of suction openings by temperature change. The temperature sensing element 19 may be a thermistor having a negative temperature coefficient, and may be sandwiched between the support arm 13 and the second thermal shield 156.

Fig. 18-19 illustrate an aerosol-generating device 100 in some embodiments of the invention, which aerosol-generating device 100 may be generally rectangular in cylindrical shape and may include a housing 2 and a heating assembly 1, a motherboard 3 and a battery 4 disposed within the housing 2. The heating element 1 may adopt the heating element structure in any of the above embodiments. It is understood that in other embodiments, the aerosol generating device 100 is not limited to being rectangular and cylindrical, but may be other shapes such as square, cylindrical, elliptical, etc.

The top of the housing 2 is provided with a socket 20 for insertion of an aerosol generating substrate 200, the cross-sectional shape and dimensions of the socket 20 being adapted to the cross-sectional shape and dimensions of the aerosol generating substrate 200, the aerosol generating substrate 200 being insertable into the heating assembly 1 via the socket 20 into contact with the inner wall surface of the heating assembly 1. The heating assembly 1, when energised to generate heat, can transfer heat to the aerosol-generating substrate 200 to effect a toasting heating of the aerosol-generating substrate 200. The mainboard 3 is respectively electrically connected with the battery 4 and the heating assembly 1. The main board 3 is provided with a related control circuit, and the on-off between the battery 4 and the heating element 1 can be controlled by a switch 5 arranged on the shell 2. The top of the housing 2 may also be provided with a dust cover 6 for covering or uncovering the socket 20. When the aerosol generating device 100 is not required to be used, the dust cap 6 can be pushed to shield the socket 20, so as to prevent dust from entering the socket 20. When required for use, the dust cap 6 is pushed to expose the socket 20 so that the aerosol generating substrate 200 is inserted from the socket 20.

The aerosol-generating substrate 200 may comprise an outer wrapper 210 and an aerosol-generating substrate 220 disposed at the bottom within the outer wrapper 210. Wherein the outer wrapper 210 may be an outer wrapper. The nebulized matrix 220 may be a material used for medical or health purposes, for example, a plant-based material such as solid sheet or filament plant roots, stems, leaves, and the like. The aerosol-generating device 100 applies low-temperature baking heating to the aerosol-generating substrate 200 inserted therein to release the aerosol extract in the nebulized substrate 220 in a non-combustible state. Further, the aerosol-generating substrate 200 may further comprise a hollow support section 230, a cooling section 240 and a filtering section 250 disposed in the outer wrapper 210 and longitudinally above the aerosol-generating substrate 220 in that order. The cross-sectional shape of the aerosol-generating substrate 200 is also not limited to being circular, but may be oval, square, polygonal, and the like.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above examples only express the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims

1. A guide member for a heating assembly of an aerosol-generating device, wherein an introduction chamber (110) for introducing an aerosol-generating substrate (200) is formed in the guide member (11), the introduction chamber (110) having first and second oppositely disposed ends (111, 112), the first and second ends (111, 112) having different cross-sectional shapes, the cross-sectional area of the second end (112) of the introduction chamber (110) being smaller than the cross-sectional area of the first end (111), and the introduction chamber (110) being in a gradual transition from the first end (111) to the second end (112).

2. A guide member according to claim 1, wherein the cross-sectional area of the second end (112) of the introduction chamber (110) is less than or equal to the cross-sectional area of the aerosol generating substrate (200) to be introduced.

3. The guide member of claim 1, wherein the cross-sectional shape of the second end (112) of the ingression lumen (110) is non-circular.

4. The guide member of claim 1, wherein the cross-sectional shape of the second end (112) of the ingression lumen (110) is polygonal.

5. The guide member of claim 4, wherein the polygon comprises a regular polygon or a Lelo polygon.

6. A guide member according to claim 1, wherein the cross-sectional shape of the first end (111) of the introduction chamber (110) matches the cross-sectional profile of the aerosol generating substrate (200) to be introduced.

7. A guide member according to claim 1, wherein the cross-sectional area of the first end (111) of the introduction chamber (110) is greater than or equal to the cross-sectional area of the aerosol-generating substrate (200) to be introduced.

8. Guide member according to claim 1, wherein the cross-sectional shape of the first end (111) of the introduction chamber (110) is circular or polygonal.

9. Guide member according to any one of claims 1-8, characterized in that a transition chamber (113) is formed in the guide member (11), said transition chamber (113) communicating with the second end (112) of the lead-in chamber (110).

10. The guide member of claim 9, wherein the cross-sectional shape of the transition lumen (113) matches the cross-sectional shape of the second end (112) of the ingression lumen (110).

11. Guide member according to any one of claims 1-8, characterized in that an open cavity (114) is formed in the guide member (11), said open cavity (114) communicating with the first end (111) of the introduction chamber (110).

12. A guide member according to claim 11, wherein the cross-sectional shape of the open cavity (114) matches the cross-sectional profile of the aerosol generating substrate (200) to be introduced.

13. The guide member of claim 11, wherein the cross-sectional area of the open cavity (114) is greater than or equal to the cross-sectional area of the first end (111) of the ingression lumen (110).

14. Guide member according to any of claims 1-8, characterized in that the guide member (11) is injection moulded from a high molecular polymer.

15. A heating assembly, comprising a heating tube (12) and a guiding element (11) according to any one of claims 1-14 connected to the heating tube (12), wherein a heating chamber (120) for containing the aerosol-generating substrate (200) is formed in the heating tube (12), and wherein the heating chamber (120) is in communication with the second end (112) of the introduction chamber (110).

16. A heating assembly according to claim 15, wherein at least part of the cavity wall of the heating cavity (120) is capable of squeezing the aerosol generating substrate (200); the cross-sectional profile of the heating chamber (120) has a maximum inscribed circle, the diameter of which is smaller than the outer diameter of the aerosol-generating substrate (200) before it is extruded in a state in which the heating chamber (120) contains the aerosol-generating substrate (200).

17. A heating assembly according to claim 15, wherein at least one air flow passage (121) is further formed between an outer wall surface of the aerosol generating substrate (200) and a wall surface of the heating chamber (120) in a state in which the heating chamber (120) contains the aerosol generating substrate (200).

18. An aerosol generating device comprising a heating assembly as claimed in any of claims 15 to 17.