CN113729286A

Movatterモバイル変換

Info

Publication number: CN113729286A
Application number: CN202111052510.XA
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: WO2023035854A1; JP7514273B2; KR20230036957A; KR102850487B1; JP2023039406A

Abstract

Translated fromChinese

本发明涉及一种加热组件及气溶胶产生装置，所述加热组件包括加热管以及与所述加热管轴向连接的导向部件，所述加热管内形成有用于容纳并加热气溶胶产生基质的加热腔，所述加热腔的横截面轮廓为多边形。所述导向部件内形成有与所述加热腔相连通用于导入所述气溶胶产生基质的导入腔，所述导入腔具有远离所述加热腔的第一端以及靠近所述加热腔的第二端。所述导入腔的所述第一端的横截面形状与待加热的所述气溶胶产生基质的横截面外形相匹配，所述导入腔的所述第二端的横截面形状与所述加热腔的横截面形状相匹配，所述导入腔从所述第一端至所述第二端为渐变过渡，气溶胶产生基质能够经由导入腔顺滑地导入到加热腔内。

The invention relates to a heating assembly and an aerosol generating device. The heating assembly comprises a heating tube and a guide member axially connected with the heating tube, and a heating cavity for accommodating and heating an aerosol-generating substrate is formed in the heating tube. , the cross-sectional contour of the heating cavity is a polygon. An introduction cavity communicated with the heating cavity for introducing the aerosol generating substrate is formed in the guide member, and the introduction cavity has a first end away from the heating cavity and a second end close to the heating cavity . The cross-sectional shape of the first end of the introduction cavity matches the cross-sectional shape of the aerosol-generating substrate to be heated, and the cross-sectional shape of the second end of the introduction cavity matches that of the heating cavity. The shape of the cross section is matched, the introduction cavity has a gradual transition from the first end to the second end, and the aerosol generating substrate can be smoothly introduced into the heating cavity through the introduction cavity.

Description

Heating assembly and aerosol generating device

Technical Field

The invention relates to the field of atomization, in particular to 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 element surrounds the aerosol-generating substrate. In the existing aerosol generating device adopting a tubular peripheral heating mode, a heating component is usually designed to be in a hollow round tubular shape, and after an aerosol generating substrate is inserted, a circle where a contour line of the cross section of the aerosol generating substrate is located and a circle of the inner wall of the heating component are contacted and overlapped or tangent. This structure has at least the following disadvantages: the distance over which heat is conducted from the outer surface of the aerosol-generating substrate to the centre is large and the difference in temperature at the centre of the aerosol-generating substrate is large.

Disclosure of Invention

The present invention is directed to an improved heating assembly and an aerosol generating device having the same, which overcome the above-mentioned disadvantages of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a heating assembly comprising a heating tube and a guiding member axially connected to the heating tube, the heating tube having a heating cavity formed therein for receiving and heating an aerosol-generating substrate, the heating cavity having a polygonal cross-sectional profile;

an introduction cavity communicated with the heating cavity and used for introducing the aerosol-generating substrate is formed in the guide part, the introduction cavity is provided with a first end far away from the heating cavity and a second end close to the heating cavity, the cross section shape of the first end of the introduction cavity is matched with the cross section shape of the aerosol-generating substrate to be heated, the cross section shape of the second end of the introduction cavity is matched with the cross section shape of the heating cavity, and the introduction cavity is gradually transited from the first end to the second end.

In some embodiments, the heating tube is integrally formed with the guide member.

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, the maximum inscribed circle has a diameter of 3-9 mm.

In some embodiments, the diameter of the largest inscribed circle is 0.2-2.0mm smaller than the outer diameter of the aerosol-generating substrate before extrusion.

In some embodiments, the maximum distance from the centre of the maximum inscribed circle to the cross-sectional profile of the heating cavity is greater than the radius of the maximum inscribed circle.

In some embodiments, the cross-sectional profile of the heating chamber is a regular polygon.

In some embodiments, each two adjacent edges of the regular polygon are connected by a circular arc transition.

In some embodiments, the cross-sectional profile of the heating chamber is a lyocell polygon.

In some embodiments, a plurality of airflow channels are 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 air flow channels are respectively positioned at the joint of every two edges of the heating cavity.

In some embodiments, the cross-sectional shape of the first end of the ingression lumen is different than the cross-sectional shape of the second end.

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

In some embodiments, the cross-sectional area of the second end of the ingression lumen is less than the cross-sectional area of the first end.

In some embodiments, the cross-sectional area of the first end of the ingression lumen is greater than or equal to the cross-sectional area of the aerosol-generating substrate to be heated.

In some embodiments, the cross-sectional area of the second end of the ingression lumen is less than or equal to the cross-sectional area of the heating lumen.

In some embodiments, a transition chamber is also formed in the guide member and communicates between the introduction chamber and the heating chamber.

In some embodiments, the transition chamber has a cross-sectional shape that matches a cross-sectional shape of the heating chamber.

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

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

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.

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 aerosol-generating substrate can be smoothly introduced into the heating chamber via the introduction chamber. Furthermore, the aerosol-generating substrate when received within the heating chamber can also be pressed inwardly by at least part of the chamber wall of the heating chamber; after the aerosol generating substrate is extruded and deformed, the distance from the radial surface to the center of the aerosol generating substrate is reduced, so that the heat conduction distance is shortened, meanwhile, air in the atomizing substrate in the aerosol generating substrate is extruded and discharged, the density of the atomizing substrate is increased, 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 are solved.

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 aheating tube 12, theheating tube 12 being hollow and tubular, an inner wall surface of theheating tube 12 defining aheating chamber 120 for receiving and heating the aerosol-generatingsubstrate 200.

The cross-section of theheating 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 theheating chamber 120 is an axisymmetric polygon, and further, the cross-section of theheating chamber 120 is a regular polygon or a lyocell polygon. The cross-sectional profile C of theheating chamber 120 has a maximum inscribed circle C1 having a diameter 2R that is smaller than the outer diameter of the aerosol-generatingsubstrate 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-generatingsubstrate 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-generatingsubstrate 200 into theheating chamber 120, at least part of the chamber wall of theheating chamber 120 is able to compress the aerosol-generatingsubstrate 200, causing the aerosol-generatingsubstrate 200 to deform radially inwardly. It will be appreciated that the greater the number of edges of the cross-sectional profile of theheating chamber 120, the closer the cross-sectional profile of theheating chamber 120 approaches a circle. In order to provide some compression of the aerosol-generatingsubstrate 200, the cross-sectional profile of theheating 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 theheating 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 theheating cavity 120 may be greater than 2mm, preferably 3-5 mm. When theaerosol generating substrate 200 is received in theheating chamber 120, at least oneairflow channel 121 is formed between the outer wall surface of theaerosol generating substrate 200 and the wall surface of theheating chamber 120, and the at least oneairflow channel 121 may extend in the axial direction of theheating chamber 120, thereby ensuring smooth airflow during smoking.

Specifically, in the present embodiment, theheating pipe 12 is a regular triangular pipe, that is, the cross-sectional outer contour and the inner contour of theheating pipe 12 are both substantially regular triangular prisms. The cross-sectional contour line C of theheating chamber 120, i.e., the cross-sectional inner contour line of theheating 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 theheating 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 theheating tube 12 corresponds to the cross-sectional shape of theheating chamber 120, i.e. the external cross-sectional shape of theheating tube 12 is also substantially a regular triangular prism with a circular transition. In other embodiments, the external cross-sectional shape of theheating tube 12 may also be different from the cross-sectional shape of theheating cavity 120, for example, the external cross-sectional shape of theheating tube 12 may also be circular or other shapes.

The aerosol-generatingsubstrate 200 is inserted into theheating tube 12 while being pressed radially inward by theheating tube 12 into a triangular shape similar to the cross-sectional shape of theheating chamber 120. Figure 2 shows a cross-sectional view of a generally cylindrical aerosol-generatingsubstrate 200 when housed within theheating tube 12, wherein the dotted lines indicate the outer cross-sectional profile of the aerosol-generatingsubstrate 200 before extrusion. After the aerosol-generatingsubstrate 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-generatingsubstrate 220 of the aerosol-generatingsubstrate 200 is extruded and discharged, and the density of the aerosol-generatingsubstrate 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-generatingsubstrate 200 are solved.

When the aerosol-generatingsubstrate 200 is received in theheating tube 12, threeair flow passages 121 may be formed between the outer wall surface of the aerosol-generatingsubstrate 200 and the wall surface of theheating chamber 120, and the threeair flow passages 121 are located at the junctions of each two edges of theheating 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 aheating element 123 which is disposed on the surface of theheating tube 12 and can generate heat after being electrified. Theheating element 123 may be a heating film, a heating wire, a heating sheet or a heating net. Specifically, in the present embodiment, theheating element 123 is a resistance heating film and may be disposed on the outer surface of theheating tube 12. Theheating element 123 generates heat after being energized, and transfers the generated heat from the outer surface of theheating tube 12 to the aerosol-generatingsubstrate 200 housed in theheating tube 12, thereby heating the aerosol-generatingsubstrate 200.

Theheating 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 theheating 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 theheating tube 12 may also be provided with a soakingfilm 122, and the soakingfilm 122 is disposed around the inner surface of theheating tube 12 and at least partially disposed in the length direction (axial direction) of theheating tube 12. The soakingfilm 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 theheating tube 12 uniform, thereby achieving uniform heating of the aerosol-generatingsubstrate 200. In some embodiments, the soakingfilm 122 may be disposed corresponding to the high temperature zone of theheating element 123 and may be disposed corresponding to the aerosol-generatingsubstrate 220 of the aerosol-generatingsubstrate 200. Specifically, the soakingfilm 122 overlaps or at least partially overlaps with the high-temperature zone of theheating body 123 and theatomization substrate 220 in the length direction of theheating tube 12. The high temperature region of theheating 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 theheating element 123 is energized. The soakingfilm 122 is arranged corresponding to the high-temperature zone of theheating element 123 and theatomization substrate 220, so that the heat of the high-temperature zone of theheating element 123 can be rapidly transferred to the soakingfilm 122 and uniformly distributed on the soakingfilm 122, and theatomization substrate 220 can be uniformly heated. It is understood that in other embodiments, the soakingfilm 122 may also be disposed on the outer surface of theheating tube 12, for example, the soakingfilm 122 may also be disposed between the resistive heating film and the outer surface of theheating 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 guidingmember 11 at the upper part of theheating tube 12 for guiding the aerosol-generatingsubstrate 200 and asupport wall 13 covering the bottom of theheating tube 12 for axial supporting positioning of the aerosol-generatingsubstrate 200. Theguide member 11, theheating pipe 12, and thesupport wall 13 may be integrally formed, or may be separately formed and assembled together.

Specifically, in the present embodiment, the supportingwall 13 covers the lower opening of theheating tube 12, and may be integrally formed with theheating tube 12. The inner side wall of theheating tube 12 and/or the upper side wall of thesupport wall 13 may also be provided with at least one limitingboss 14 for limiting the aerosol-generatingsubstrate 200. The at least one limitingprojection 14 and theheating tube 12 and/or thesupport 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 limitingprojection 14, and the one limitingprojection 14 may be integrally formed by bending the supportingwall 13 upward and may coincide with the central axis of the supportingwall 13. The top surface of the retainingboss 14 is planar and the lower end surface of the aerosol-generatingsubstrate 200 may be supported and positioned against the at least one retainingboss 14. In other embodiments, there may be two or more limitingbosses 14, and the two or more limitingbosses 14 may be distributed on the periphery of the supportingwall 13 and may be uniformly spaced along the circumference of the supportingwall 13.

Theguide member 11 is tubular with a hollow interior, and the inner wall surface of theguide member 11 defines anintroduction chamber 110 for introducing the aerosol-generatingsubstrate 200. Theintroduction chamber 110 has afirst end 111 distal to theheating tube 12 and asecond end 112 proximal to theheating tube 12. Theingression lumen 110 has a cross-section A and a cross-section B at thefirst end 111 and thesecond 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-generatingsubstrate 200 before it is extruded, and preferably is greater than the cross-sectional area of the aerosol-generatingsubstrate 200 before it is extruded, facilitating smooth introduction of the aerosol-generatingsubstrate 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-generatingsubstrate 200 before it is extruded, in this embodiment the aerosol-generatingsubstrate 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-generatingsubstrate 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 theheating 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, thesecond end 112 of theintroduction chamber 110 is connected to the upper end of theheating chamber 120, and the cross-sectional size of thesecond end 112 of theintroduction chamber 110 is identical to the cross-sectional size of theheating chamber 120. In other embodiments, the cross-sectional dimension of thesecond end 112 of theintroduction chamber 110 may also be smaller than the cross-sectional dimension of theheating chamber 120. Theintroduction chamber 110 may have a smooth transition from thefirst end 111 to thesecond end 112, i.e., the cross-section of theintroduction chamber 110 is gradually changed from a circular shape at thefirst end 111 to a regular triangular shape corresponding to the cross-section of theheating tube 12, and is engaged with theheating tube 12. The aerosol-generatingsubstrate 200 is smoothly inserted into theheating tube 12 via the guiding function of the guidingmember 11 while being pressed radially inward by theheating tube 12 into a triangular shape similar to the cross-sectional shape of theheating chamber 120.

The outer cross-sectional shape of theguide member 11 may correspond to the cross-sectional shape of theintroduction chamber 110, and specifically, in the present embodiment, the outer cross-sectional shape of theguide 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 theguide member 11 may also be different from the cross-sectional shape of theingression 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-generatingfilm 125 disposed on the surface of theheating pipe 12. Theheating element 123 may be disposed on the outer surface of theheating tube 12, and the two electrode leads 124 may be welded to the outer surface of the bottom of theheating tube 12 respectively and are welded to theheating element 123. The infraredradiation heating film 125 may be disposed on the inner surface of theheating pipe 12. Theheating 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 theheating 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 infraredradiation heating film 125 can also be disposed on the outer surface of theheating tube 12, and in this case, theheating 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 theheating tube 12 is only provided with the infraredradiation heating film 125, and is not provided with theheating body 123. The infraredradiation heating film 125 can be disposed on the inner surface of theheating tube 12, and at this time, theheating tube 12 can be made of a metal or non-metal material with high temperature resistance and low thermal conductivity. Alternatively, the infraredradiation heating film 125 can be disposed on the outer surface of theheating tube 12, and in this case, theheating 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 theheating 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 theheating 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 aheating 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 theheating 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 aheating 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 theheating 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 aheating 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 theheating 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 aheating 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 theheating chamber 120 in this embodiment is a leilo polygon having an odd number of arc-shaped sides. The odd number of arcuate surfaces of theheating chamber 120 have a greater contact area with the aerosol-generatingsubstrate 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-incavity 110 and atransition cavity 113 communicating axially with the lead-incavity 110 are formed in theguide member 11. Theintroduction chamber 110 has asecond end 112 proximate to theheating tube 12 and afirst end 111 distal to theheating tube 12. Theingression lumen 110 has a cross-section A and a cross-section B at thefirst end 111 and thesecond 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 theintroduction chamber 110 matches the cross-sectional shape of theheating chamber 120, and the cross-sectional area of the cross-section B is less than or equal to the cross-sectional area of theheating chamber 120.

The upper end of thetransition chamber 113 communicates with thesecond end 112 of theingression lumen 110. the upper end of thetransition chamber 113 has a cross-sectional shape and size that is compatible with the cross-sectional shape and size of thesecond end 112 of theingression lumen 110. The lower end of thetransition chamber 113 communicates with the upper end of theheating chamber 120, and the cross-sectional shape and size of the lower end of thetransition chamber 113 may be adapted to the cross-sectional shape and size of the upper end of theheating 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 theheating 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-generatingsubstrate 200 is received in theheating chamber 120, twoair flow passages 121 may be formed between the outer wall surface of the aerosol-generatingsubstrate 200 and the wall surface of theheating chamber 120, the twoair flow passages 121 being located on either side of the long axis of theheating chamber 120. It will be appreciated that in other embodiments the cross-section of theheating chamber 120 may be other non-circular shapes, preferably axisymmetric non-circular shapes.

Accordingly, the cross-sectional shape of thesecond end 112 of theintroduction chamber 110 communicating with theheating chamber 120 is a racetrack circle conforming to the cross-sectional shape of theheating chamber 120, and the cross-sectional dimension of thesecond end 112 of theintroduction chamber 110 conforms to the cross-sectional dimension of theheating chamber 120. The cross-sectional shape of thefirst end 111 of theingression lumen 110 may be circular and the cross-sectional shape of theingression lumen 110 tapers from the circular shape of thefirst end 111 to a racetrack circular shape of thesecond end 112.

In addition, in the present embodiment, the heating module 1 may further have a plurality of throughholes 10 communicating with theheating cavity 120. The throughhole 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 theguide member 11 and/or theheating pipe 12, and/or the through-hole 10 may be opened in thesupport wall 13 and/or thelimit 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 aheating tube 12, a guidingmember 11 disposed at the top of theheating tube 12, a supportingwall 13 disposed at the bottom of theheating tube 12, and anouter tube 16 sleeved outside theheating tube 12. Theguide member 11, theheating pipe 12, thesupport wall 13, and theouter pipe 16 are individually molded and then assembled together.

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

Theheating tube 12 may be made of a metal or non-metal material having high thermal conductivity. The outer wall surface of theheating tube 12 may be provided with aheat generating component 17, theheat generating component 17 including a heat generating body and/or a circuit board. In the present embodiment, theheat generating component 17 includes a flexible circuit board and a thick film heat generating body provided on the flexible circuit board. In other embodiments, theheat 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.

Theguide member 11 may be formed by injection molding of a high-temperature-resistant polymer, such as PEEK (polyetheretherketone), nylon, or the like. Theguide member 11 may include abody portion 115, anend wall 116 extending outwardly from an outer wall surface of thebody portion 115, and anannular wall 117 extending downwardly from theend wall 116. The inner wall surface of thebody portion 115 defines an open cavity 114 and anintroduction cavity 110. The cross-sectional shape of the open cavity 114 may match the cross-sectional shape of the aerosol-generatingsubstrate 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-generatingsubstrate 200 prior to extrusion. Theintroduction chamber 110 has afirst end 111 distal to theheating tube 12 and asecond end 112 proximal to theheating tube 12. Thefirst end 111 of theintroduction chamber 110 communicates with the lower end of the open chamber 114, and the cross-sectional shape of theintroduction chamber 110 at thefirst end 111 may match the cross-sectional shape of the open chamber 114. The cross-sectional area of theingression lumen 110 at thefirst end 111 may be less than or equal to the cross-sectional area of the open lumen 114.

Theingression lumen 110 has a cross-sectional area at itssecond end 112 that is smaller than the cross-sectional area at itsfirst end 111. Thesecond end 112 of theintroduction chamber 110 communicates with the upper end of theheating chamber 120, and the cross-sectional shape and area of thesecond end 112 of theintroduction chamber 110 matches the cross-sectional shape and area of theheating chamber 120. Theingression lumen 110 may take the form of a gradual transition from thefirst end 111 to thesecond end 112, i.e., the cross-sectional shape of theingression lumen 110 gradually changes from a circular shape at thefirst end 111 to a regular triangular shape at thesecond end 112. The external cross-sectional shape ofbody portion 115 may match the cross-sectional shape ofingression lumens 110.

End wall 116 may be formed by extending radially outward from the intersection offirst end 111 andsecond end 112 ofbody portion 115. Anannular wall 117 may be closely nested in the upper end opening of theouter tube 16, which may be formed by an outer ring of theend wall 116 extending vertically downward. Theannular wall 117 may have a circular cross-section, and an annular receiving space for receiving thefirst heat insulator 155 is formed between an inner wall surface of theannular wall 117 and an outer wall surface of thebody portion 115.

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

Theouter 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, theouter 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. Theouter 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 aninsulation assembly 15 disposed between theouter tube 16 and theheating tube 12. Theheat insulation assembly 15 may include a firstheat insulation layer 151, a secondheat insulation layer 152, a thirdheat insulation layer 153, and aheat dissipation layer 154 sequentially disposed outside theheating 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 theheat dissipation layer 154 may be a graphite sheet or a graphene sheet.

Thesecond insulation layer 152 may be a vacuum tube. Theinsulation 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 firstheat insulation piece 155 and the secondheat insulation piece 156, so that the functions of heat insulation and sealing are realized. It is understood that in other embodiments, thethermal insulation assembly 15 may also be composed of only one or more of the firstthermal insulation layer 151, the secondthermal insulation layer 152, the thirdthermal insulation layer 153, and theheat dissipation layer 154, and the relative position relationship between the firstthermal insulation layer 151, the secondthermal insulation layer 152, the thirdthermal insulation layer 153, and theheat dissipation layer 154 may also be adjusted as needed, for example, theheat dissipation layer 154 may also be disposed between the firstthermal insulation layer 151 and the secondthermal insulation layer 152.

In this embodiment, the heating assembly 1 may further include a base 18 embedded in the bottom of theouter 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 theouter tube 16 and the outer wall surface of the secondthermal insulation member 156.

Furthermore, the heating assembly 1 may further comprise atemperature detecting element 19, wherein thetemperature detecting element 19 may be disposed at the bottom of thesupport arm 13, and may detect the temperature of the bottom of theaerosol generating substrate 200, and may also detect the number of suction openings by temperature change. Thetemperature sensing element 19 may be a thermistor having a negative temperature coefficient, and may be sandwiched between thesupport arm 13 and the secondthermal shield 156.

Fig. 18-19 illustrate an aerosol-generatingdevice 100 in some embodiments of the invention, which aerosol-generatingdevice 100 may be generally rectangular in cylindrical shape and may include ahousing 2 and a heating assembly 1, a motherboard 3 and a battery 4 disposed within thehousing 2. The heating element 1 may adopt the heating element structure in any of the above embodiments. It is understood that in other embodiments, theaerosol 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 thehousing 2 is provided with asocket 20 for insertion of anaerosol generating substrate 200, the cross-sectional shape and dimensions of thesocket 20 being adapted to the cross-sectional shape and dimensions of theaerosol generating substrate 200, theaerosol generating substrate 200 being insertable into the heating assembly 1 via thesocket 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-generatingsubstrate 200 to effect a toasting heating of the aerosol-generatingsubstrate 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 aswitch 5 arranged on theshell 2. The top of thehousing 2 may also be provided with a dust cover 6 for covering or uncovering thesocket 20. When theaerosol generating device 100 is not required to be used, the dust cap 6 can be pushed to shield thesocket 20, so as to prevent dust from entering thesocket 20. When required for use, the dust cap 6 is pushed to expose thesocket 20 so that theaerosol generating substrate 200 is inserted from thesocket 20.

The aerosol-generatingsubstrate 200 may comprise anouter wrapper 210 and an aerosol-generatingsubstrate 220 disposed at the bottom within theouter wrapper 210. Wherein theouter wrapper 210 may be an outer wrapper. Thenebulized 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-generatingdevice 100 applies low-temperature baking heating to the aerosol-generatingsubstrate 200 inserted therein to release the aerosol extract in thenebulized substrate 220 in a non-combustible state. Further, the aerosol-generatingsubstrate 200 may further comprise ahollow support section 230, acooling section 240 and afiltering section 250 disposed in theouter wrapper 210 and longitudinally above the aerosol-generatingsubstrate 220 in that order. The cross-sectional shape of the aerosol-generatingsubstrate 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 heating assembly comprising a heating tube (12) and a guiding means (11) axially connected to the heating tube (12), a heating chamber (120) being formed within the heating tube (12) for receiving and heating an aerosol-generating substrate (200), the heating chamber (120) having a polygonal cross-sectional profile;

an introduction chamber (110) communicating with the heating chamber (120) for introducing the aerosol generating substrate (200) is formed in the guide member (11), the introduction chamber (110) having a first end (111) remote from the heating chamber (120) and a second end (112) proximate to the heating chamber (120), the first end (111) of the introduction chamber (110) having a cross-sectional shape matching the cross-sectional profile of the aerosol generating substrate (200) to be heated, the second end (112) of the introduction chamber (110) having a cross-sectional shape matching the cross-sectional shape of the heating chamber (120), the introduction chamber (110) being in a gradual transition from the first end (111) to the second end (112).

2. A heating assembly according to claim 1, 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).

3. A heating assembly as claimed in claim 2, wherein the maximum inscribed circle is 3-9mm in diameter.

4. A heating assembly according to claim 2, wherein the diameter of the largest inscribed circle is 0.2-2.0mm smaller than the outer diameter of the aerosol-generating substrate (200) before being pressed.

5. The heating assembly of claim 2, wherein the maximum distance from the center of the maximum inscribed circle to the cross-sectional profile of the heating cavity (120) is greater than the radius of the maximum inscribed circle.

6. The heating assembly of claim 1, wherein the cross-sectional profile of the heating cavity (120) is a regular polygon.

7. The heating element of claim 6, wherein each two adjacent edges of the regular polygon are connected by a circular transition.

8. The heating assembly of claim 1, wherein the cross-sectional profile of the heating cavity (120) is a lyocell polygon.

9. A heating assembly according to claim 1, wherein a plurality of air flow passages (121) are also formed between the outer wall surface of the aerosol generating substrate (200) and the wall surface of the heating chamber (120) in a state in which the heating chamber (120) contains the aerosol generating substrate (200); the air flow channels (121) are respectively positioned at the joint of every two edges of the heating cavity (120).

10. The heating assembly according to claim 1, characterized in that the heating tube (12) is integrally formed with the guiding part (11).

11. A heating assembly according to any of claims 1-10, characterized in that the cross-sectional shape of the first end (111) of the introduction chamber (110) is different from the cross-sectional shape of the second end (112).

12. A heating assembly according to any of claims 1-10, wherein the cross-sectional shape of the first end (111) of the introduction chamber (110) is circular or polygonal.

13. A heating assembly according to any of claims 1-10, characterized in that the cross-sectional area of the second end (112) of the introduction chamber (110) is smaller than the cross-sectional area of the first end (111).

14. A heating assembly according to any of claims 1-10, wherein the cross-sectional area of the first end (111) of the ingression lumen (110) is greater than or equal to the cross-sectional area of the aerosol-generating substrate (200) to be heated.

15. A heating assembly according to any of claims 1 to 10, wherein the cross-sectional area of the second end (112) of the introduction chamber (110) is smaller than or equal to the cross-sectional area of the heating chamber (120).

16. A heating assembly according to any of claims 1-10, wherein a transition chamber (113) communicating between the introduction chamber (110) and the heating chamber (120) is further formed in the guiding member (11).

17. The heating assembly of claim 16, wherein the cross-sectional shape of the transition chamber (113) matches the cross-sectional shape of the heating chamber (120).

18. A heating assembly according to any of claims 1-10, wherein an open cavity (114) is further formed in the guiding member (11) communicating with the first end (111) of the introduction chamber (110).

19. A heating assembly according to claim 18, wherein the cross-sectional shape of the open cavity (114) matches the cross-sectional profile of the aerosol-generating substrate (200) to be heated; the cross-sectional area of the open lumen (114) is greater than or equal to the cross-sectional area of the first end (111) of the ingression lumen (110).

20. An aerosol generating device comprising a heating assembly as claimed in any of claims 1 to 19.