WO2023035852A1

WO2023035852A1 - Guide component, heating assembly and aerosol generating device

Info

Publication number: WO2023035852A1
Application number: PCT/CN2022/111891
Authority: WO
Inventors: 沈丕发; 何丹充; 邢凤雷
Original assignee: 深圳麦克韦尔科技有限公司
Priority date: 2021-09-08
Filing date: 2022-08-11
Publication date: 2023-03-16
Also published as: JP2023039405A; KR20230036956A; CN113729287A

Abstract

A guide component (11), a heating assembly (1), and an aerosol generating device (100), wherein an introducing cavity (110) for introducing an aerosol generating substrate (200) is formed in the guide component (11); the introducing cavity (110) has a first end (111) and a second end (112) which are arranged opposite each other; the cross-sectional shapes of the first end (111) and the second end (112) are different; and the cross-sectional area of the second end (112) of the introducing cavity (110) is smaller than the cross-sectional area of the first end (111). The introducing cavity (110) gradually transitions from the first end (111) to the second end (112). The guide component (11) is capable of smoothly introducing the aerosol generating substrate (200) into the heating assembly (1) for heating.

Description

Guiding component, heating element and aerosol generating device

technical field

The invention relates to the field of atomization, and more specifically relates to a guide component, a heating component and an aerosol generating device.

Background technique

The heat-not-burn atomizing device is an aerosol generating device that heats the atomized material to form an inhalable aerosol by means of low-temperature heat-not-burn. At present, the heating methods of aerosol generating devices are usually tubular peripheral heating or central embedded heating. Wherein, the tubular peripheral heating means that the heating tube surrounds the aerosol generating matrix. Existing heating tubes are usually designed as hollow circular tubes. After the aerosol generating substrate is inserted, the circle where the contour line of the cross section of the aerosol generating substrate is located coincides with or is tangent to the circle of the inner wall of the heating tube. The aerosol-generating substrate usually needs to be aligned before being inserted into the heating tube for heating. When the cross-sectional shape of the aerosol-generating substrate is different from that of the heating tube, it is difficult to insert the aerosol-generating substrate into the heating tube.

technical problem

The technical problem to be solved by the present invention is to provide an improved guide component, a heating assembly and an aerosol generating device having the guide component, aiming at the above-mentioned defects of the prior art.

technical solution

The technical solution adopted by the present invention to solve the technical problem is: to construct a guide part for the heating assembly of the aerosol generating device, an introduction cavity for introducing the aerosol generation matrix is formed in the guide part, and the introduction cavity It has a first end and a second end oppositely arranged, the cross-sectional shapes of the first end and the second end are different, and the cross-sectional area of the second end of the introduction cavity is smaller than the cross-sectional area of the first end area, and the introduction cavity is 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 cross-sectional shape of the second end of the introduction lumen is non-circular.

In some embodiments, the cross-sectional shape of the second end of the introduction cavity is polygonal.

In some embodiments, the polygons include regular polygons or Lello polygons.

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

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

In some embodiments, the cross-sectional shape of the first end of the introduction cavity is circular or polygonal.

In some embodiments, a transition cavity is further formed in the guide member, and the transition cavity communicates with the second end of the introduction cavity.

In some embodiments, the cross-sectional shape of the transition cavity matches the cross-sectional shape of the second end of the introduction cavity.

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

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

In some embodiments, the cross-sectional area of the opening is greater than or equal to the cross-sectional area of the first end of the introduction cavity.

In some embodiments, the guide part is injection-molded with high molecular polymer.

The present invention also provides a heating assembly, including a heating tube and a guide member as described in any one of the above-mentioned heating tubes connected to the heating tube, and a heating cavity for accommodating the aerosol-generating substrate is formed in the heating tube, so The heating chamber communicates with the second end of the introduction chamber.

In some embodiments, at least part of the cavity wall of the heating chamber is capable of squeezing the aerosol-generating substrate; The state of the aerosol-generating matrix, the diameter of the largest inscribed circle is smaller than the outer diameter of the aerosol-generating matrix before being squeezed.

In some embodiments, when the heating chamber contains the aerosol-generating substrate, at least one airflow channel is formed between the outer wall of the aerosol-generating substrate and the wall of the heating chamber.

The present invention also provides an aerosol generating device, comprising the heating assembly described in any one of the above.

Beneficial effect

The implementation of the present invention has at least the following beneficial effects: the structural configuration of the guide component can smoothly introduce the aerosol-generating substrate into the heating assembly for heating.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a schematic diagram of the three-dimensional structure of the heating assembly in the first embodiment of the present invention;

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

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

Fig. 4 is a schematic diagram of the cross-sectional outline of the heating chamber in Fig. 1;

Fig. 5 is a schematic perspective view of the three-dimensional structure of the heating assembly in the second embodiment of the present invention;

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

Fig. 7 is a schematic diagram of the cross-sectional outline of the heating chamber of the heating assembly in the third embodiment of the present invention;

Fig. 8 is a schematic diagram of the cross-sectional outline of the heating chamber of the heating assembly in the fourth embodiment of the present invention;

Fig. 9 is a schematic diagram of the cross-sectional outline of the heating chamber of the heating assembly in the fifth embodiment of the present invention;

Fig. 10 is a schematic diagram of the cross-sectional outline of the heating chamber of the heating assembly in the sixth embodiment of the present invention;

Fig. 11 is a schematic diagram of the cross-sectional outline of the heating chamber of the heating assembly in the seventh embodiment of the present invention;

Fig. 12 is a schematic longitudinal sectional view of the heating assembly in the eighth embodiment of the present invention;

Fig. 13 is a schematic perspective view of the three-dimensional structure of the heating assembly in the ninth embodiment of the present invention;

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

Fig. 15 is a schematic perspective view of the three-dimensional structure of the heating element containing the aerosol-generating substrate in the tenth embodiment of the present invention;

Fig. 16 is a schematic longitudinal sectional view of the heating assembly shown in Fig. 15;

Fig. 17 is a schematic diagram of an exploded structure of the heating assembly shown in Fig. 15;

Fig. 18 is a schematic diagram of a three-dimensional structure of an aerosol generating device inserted with an aerosol generating substrate in some embodiments of the present invention;

Fig. 19 is a schematic longitudinal sectional view of the aerosol generating device shown in Fig. 18 when an aerosol generating substrate is inserted.

Embodiments of the present invention

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners 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. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship that is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention. The invention and the simplified description do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. 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. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

Figures 1-4 show the heating assembly 1 in the first embodiment of the present invention. The heating method of the heating assembly 1 can be resistance conduction heating, electromagnetic heating, infrared radiation heating or composite heating. The heating assembly 1 includes a heating tube 12 , the heating tube 12 is in the shape of a hollow tube, and the inner wall of the heating tube 12 defines a heating chamber 120 for accommodating and heating the aerosol generating substrate 200 .

The cross-section of the heating cavity 120 may be a non-circular polygon, such polygon includes but not limited to triangle, square, trapezoid, pentagon and so on. Preferably, the cross-section of the heating cavity 120 is an axisymmetric polygon, further, the cross-section of the heating cavity 120 is a regular polygon or a Rello polygon. The cross-sectional contour line C of the heating cavity 120 has a maximum inscribed circle C1, and the diameter 2R of the maximum inscribed circle C1 is smaller than the outer diameter of the aerosol-generating substrate 200 before being squeezed. In some embodiments, the diameter of the largest inscribed circle may be 0.2-2.0 mm smaller than the outer diameter of the aerosol-generating substrate 200 before being squeezed. In some embodiments, the diameter 2R of the largest inscribed circle C1 may be 3-9 mm, such as 4 mm, preferably 5-7 mm. When the aerosol-generating substrate 200 is inserted into the heating cavity 120 , at least part of the cavity wall of the heating cavity 120 can press the aerosol-generating substrate 200 , prompting the aerosol-generating substrate 200 to deform radially inward. It can be understood that the more edges there are in the cross-sectional profile of the heating cavity 120 , the closer the cross-sectional profile of the heating cavity 120 is to a circle. In order to effectively squeeze the aerosol-generating substrate 200 to a certain extent, the number of edges in the cross-sectional profile of the heating chamber 120 should not be too many, and in some embodiments, the number of edges can be 3-7.

The maximum distance L between the center of the largest inscribed circle C1 and the cross-sectional contour line C of the heating cavity 120 is greater than the radius R of the largest inscribed circle C1 . In some embodiments, the maximum distance L from the center of the maximum inscribed circle C1 to the cross-sectional contour line C of the heating cavity 120 may be greater than 2 mm, preferably 3-5 mm. When the aerosol-generating substrate 200 is accommodated in the heating chamber 120, at least one airflow passage 121 is formed between the outer wall of the aerosol-generating substrate 200 and the wall of the heating chamber 120, and the at least one airflow passage 121 can be along the heating chamber 120. Extending in the axial direction can ensure smooth air flow during suction.

Specifically, in this embodiment, the heating tube 12 is a regular triangular tube, that is, the outer contour and the inner contour of the cross section of the heating tube 12 are approximately regular triangular. The cross-sectional contour line C of the heating chamber 120 , that is, the cross-sectional inner contour line of the heating tube 12 , is roughly in the shape of a regular triangular prism with three straight edges C2 . The junction of every two straight edges C2 of the cross-sectional contour line C of the heating cavity 120 may be provided with a rounded corner C3, and the smoothness of the junction can be improved through proper chamfering.

The external cross-sectional shape of the heating tube 12 corresponds to the cross-sectional shape of the heating chamber 120 , that is, the external cross-sectional shape of the heating tube 12 is also roughly a regular triangular prism connected by a circular arc 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 a circle or other shapes.

The aerosol-generating substrate 200 is inserted into the heating tube 12 and simultaneously pressed radially inward by the heating tube 12 into a triangular shape similar to the cross-sectional shape of the heating cavity 120 . FIG. 2 is a cross-sectional view of the roughly cylindrical aerosol-generating substrate 200 accommodated in the heating tube 12 , where the dotted line represents the outline of the cross-section of the aerosol-generating substrate 200 before being squeezed. After the aerosol generating matrix 200 is squeezed and deformed, the distance from its radial surface to the center is reduced, thereby shortening the heat conduction distance. At the same time, the air inside the atomized substrate 220 of the aerosol-generating substrate 200 is squeezed out, and the density of the atomized substrate 220 increases, thereby improving the heat conduction efficiency and improving the large temperature difference and low heat conduction efficiency of the aerosol-generating substrate 200. The problem of long warm-up time.

When the aerosol-generating substrate 200 is accommodated in the heating tube 12, three airflow passages 121 may be formed between the outer wall of the aerosol-generating substrate 200 and the wall of the heating chamber 120, and the three airflow passages 121 are respectively located in the heating chamber. 120 Every two edges meet.

As shown in FIG. 3 , in this embodiment, the heating assembly 1 is heated by pure resistance conduction heating. The heating assembly 1 also includes a heating element 123 disposed on the surface of the heating tube 12 and capable of generating heat after being energized. The heating element 123 can be a heating film, a heating wire, a heating sheet or a heating net. Specifically, in this embodiment, the heating element 123 is a resistive heating film and can 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 accommodated in the heating tube 12 to heat the aerosol-generating substrate 200 .

The heating tube 12 can be made of metal or non-metallic material with high thermal conductivity, which is conducive to the rapid transfer of heat, and the temperature field uniformity of the heating tube 12 is better under rapid temperature rise. Wherein, the metal material with higher thermal conductivity may include stainless steel, aluminum or aluminum alloy. The non-metallic material with higher thermal conductivity may include ceramics, such as aluminum oxide, silicon carbide, aluminum nitride, silicon nitride and other ceramics.

The inner surface of the heating tube 12 can also be provided with a heat soaking film 122 , and the heat soaking film 122 is arranged around the inner surface of the heating tube 12 and is at least partially arranged in the length direction (axial direction) of the heating tube 12 . The heat spreading film 122 can be made of high thermal conductivity materials such as copper or silver, and is used to make the temperature field on the inner surface of the heating tube 12 uniform, so as to achieve uniform heating of the aerosol generating substrate 200 . In some embodiments, the heat spreading film 122 can be arranged corresponding to the high temperature area of the heating element 123 , and can be arranged corresponding to the atomizing substrate 220 of the aerosol generating substrate 200 . Specifically, the heat equalizing film 122 overlaps or at least partially overlaps with the high temperature area of the heating element 123 and the atomizing substrate 220 in the length direction of the heating tube 12 . The high temperature area of the heating element 123 is usually an area where the distribution of heating traces is relatively dense, and this area generates more heat and has a higher temperature after the heating element 123 is energized. The heat soaking film 122 is set corresponding to the high temperature area of the heating element 123 and the atomization substrate 220, so that the heat in the high temperature area of the heating element 123 can be quickly transferred to the heat soaking film 122 and evenly distributed on the heat soaking film 122, so as to realize the mist Uniform heating of the substrate 220. Understandably, in other embodiments, the heat equalizing film 122 may also be disposed on the outer surface of the heating pipe 12 , for example, the heat equalizing film 122 may also be disposed between the resistance heating film and the outer surface of the heating pipe 12 .

5-6 show the heating assembly 1 in the second embodiment of the present invention. The main difference between it and the first embodiment is that the heating assembly 1 in this embodiment also includes an upper part of the heating pipe 12 for introducing air. The guide part 11 of the aerosol-generating substrate 200 and the supporting wall 13 covering the bottom of the heating tube 12 are used for axially supporting and positioning the aerosol-generating substrate 200 . The guide component 11, the heating pipe 12, and the supporting wall 13 can be integrally formed, or can be formed separately and then assembled together.

Specifically, in this embodiment, the supporting wall 13 covers the opening of the lower end of the heating tube 12 and can 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 supporting 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 boss 14 and the heating tube 12 and/or the supporting wall 13 can be integrally formed, or they can be formed separately and then assembled together by welding or the like. In this embodiment, there is one limiting boss 14 , and the one limiting boss 14 can be formed by integrally bending upwards of the support wall 13 and can coincide with the central axis of the support wall 13 . The top surface of the limiting boss 14 is a plane, and the lower end surface of the aerosol-generating substrate 200 can abut against the at least one limiting boss 14 to achieve supporting positioning. 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 arranged along the periphery of the supporting wall 13. Set to evenly spaced.

The guide part 11 is in the shape of a hollow tube, and the inner wall of the guide part 11 defines an introduction cavity 110 for introducing the aerosol generating matrix 200 . The introduction cavity 110 has a first end 111 away from the heating tube 12 and a second end 112 close to the heating tube 12 . The introduction cavity 110 has a cross-section A and a cross-section B at the first end 111 and the second end 112 respectively, and the cross-sectional area of the cross-section B is smaller than the cross-sectional area of the cross-section A. The cross-sectional area of the cross-section A is not smaller than the cross-sectional area of the aerosol-generating substrate 200 before being squeezed. Preferably, the cross-sectional area of the cross-section A is larger than the cross-sectional area of the aerosol-generating substrate 200 before being squeezed, which is beneficial to The aerosol-generating substrate 200 is smoothly introduced into the heating element 1 . The cross-sectional shape of the cross-section A may correspond to the cross-sectional shape of the aerosol-generating substrate 200 before being squeezed. In this embodiment, the aerosol-generating substrate 200 is cylindrical, and the cross-sectional shape of the cross-section A is a circle. shape. In other embodiments, the cross-sectional shape of the cross-section A can 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 can also be non-circular, including triangle, square, trapezoid, etc. polygon.

The cross-sectional shape of the cross-section B matches the cross-sectional shape of the heating cavity 120 , and is different from the cross-sectional shape of the cross-section A. In this embodiment, the cross-sectional shape of the cross-section B is roughly a regular triangular prism connected by a circular arc 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 consistent with the cross-sectional size of the heating chamber 120 . In other embodiments, the cross-sectional dimension of the second end 112 of the introduction cavity 110 may also be smaller than the cross-sectional dimension of the heating cavity 120 . The introduction chamber 110 can adopt a smooth gradual transition from the first end 111 to the second end 112, that is, the cross-section of the introduction chamber 110 gradually changes from a circle at the first end 111 to a regular triangular prism consistent with the cross-section of the heating tube 12. The heating pipe 12 is connected. The aerosol-generating substrate 200 is smoothly inserted into the heating tube 12 through the guiding function of the guiding member 11 , and at the same time is pressed radially inward by the heating tube 12 into a triangular shape similar to the cross-sectional shape of the heating cavity 120 .

The outer cross-sectional shape of the guide member 11 may correspond to the cross-sectional shape of the introduction cavity 110. Specifically, in this embodiment, the outer cross-sectional shape of the guide member 11 gradually changes from a circle at the upper end to a regular triangular prism 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 introduction cavity 110 .

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

In other embodiments, the heating assembly 1 may also only use infrared radiation heating, that is, the surface of the heating pipe 12 is only provided with an infrared radiation heating film 125 without a heating element 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 metal or non-metallic material with high temperature resistance and low thermal conductivity. Alternatively, the infrared radiation heating film 125 can also be arranged on the outer surface of the heating tube 12, and at this time, the heating tube 12 can be made of materials such as quartz with low thermal conductivity and high infrared transmittance.

7 shows a schematic diagram of the cross-sectional contour line C of the heating chamber 120 in the third embodiment of the present invention. The main difference between it and the first embodiment is that the cross-sectional contour line C of the heating chamber 120 in this embodiment is a positive triangle Prismatic, and every two straight edges are directly connected, that is, there is no chamfer at the junction of every two straight edges.

Fig. 8 shows a schematic diagram of the cross-sectional contour line C of the heating chamber 120 in the fourth embodiment of the present invention, which is mainly different from the first embodiment in that the cross-sectional contour line C of the heating chamber 120 in this embodiment is a regular quadrilateral , and every two adjacent edges are directly connected.

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

10 shows a schematic diagram of the cross-sectional contour line C of the heating chamber 120 in the sixth embodiment of the present invention. The main difference between it and the first embodiment is that the cross-sectional contour line C of the heating chamber 120 in this embodiment is positive six polygon, and every two adjacent edges are directly connected.

Fig. 11 shows a schematic diagram of the cross-sectional contour line C of the heating chamber 120 in the seventh embodiment of the present invention. The main difference between it and the first embodiment is that the cross-sectional contour line C of the heating chamber 120 in this embodiment has A low polygon with an odd number of curved sides. The odd-numbered arc-shaped surfaces of the heating chamber 120 have a larger contact area with the aerosol-generating substrate 200 . Specifically, in this embodiment, the cross-sectional contour line C is in the form of a Lello triangle. In other embodiments, the cross-sectional contour line C may also be in the form of a Lello pentagon, a heptagon, or the like.

Fig. 12 shows the heating assembly 1 in the eighth embodiment of the present invention. The main difference between it and the second embodiment is that in this embodiment, an introduction cavity 110 is formed in the guide member 11 and is axially aligned with the introduction cavity 110. Connected transition cavity 113 . The introduction cavity 110 has a second end 112 close to the heating tube 12 and a first end 111 away from the heating tube 12 . The introduction cavity 110 has a cross-section A and a cross-section B at the first end 111 and the second end 112 respectively, and the cross-sectional area of the cross-section A is larger than that of the 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 smaller 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 introduction chamber 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 can match the cross-sectional shape and size of the upper end of the heating chamber 120 .

13-14 show the heating assembly 1 in the ninth embodiment of the present invention. The main difference between it and the second embodiment is that in this embodiment, the cross section of the heating chamber 120 is a racetrack circle, and the raceway circle The diameter of the largest inscribed circle of the circular cross-section is consistent with the length of the minor axis of the circular cross-section of the runway. When the aerosol-generating substrate 200 is accommodated in the heating chamber 120, two airflow passages 121 may be formed between the outer wall of the aerosol-generating substrate 200 and the wall of the heating chamber 120, and the two airflow passages 121 are located in the heating chamber respectively. 120 on both sides of the major axis. It can be understood that in other embodiments, the cross-section of the heating chamber 120 can also be other non-circular, preferably axisymmetric non-circular.

Correspondingly, the cross-sectional shape of the second end 112 of the introduction chamber 110 communicating with the heating chamber 120 is a racetrack circular shape consistent with the cross-sectional shape of the heating chamber 120, and the cross-sectional size of the second end 112 of the introduction chamber 110 is the same as that of the heating chamber 120. The cross-sectional dimensions of the heating chamber 120 are consistent. The cross-sectional shape of the first end 111 of the introduction cavity 110 may be circular, and the cross-sectional shape of the introduction cavity 110 gradually changes from a circle at the first end 111 to a racetrack circle at the second end 112 .

In addition, in this embodiment, several through holes 10 communicating with the heating chamber 120 may also be opened on the heating assembly 1 . The through hole 10 can be opened at any position of the heating assembly 1 as required. For example, the through hole 10 can be opened on the side wall of the guide component 11 and/or the heating pipe 12 , and/or, the through hole 10 can also be opened on the support wall 13 and/or the limiting boss 14 . The shape, size and quantity of the through holes 10 are not limited.

15-17 show the heating assembly 1 in the tenth embodiment of the present invention, the heating assembly 1 may include a heating pipe 12, a guide member 11 arranged at the top of the heating pipe 12, and a support wall 13 arranged at the bottom of the heating pipe 12 And the outer tube 16 sleeved outside the heating tube 12 . The guide part 11, the heating tube 12, the supporting wall 13, and the outer tube 16 are formed separately and then assembled together.

Specifically, the heating tube 12 is a regular triangular tube, and the axial length of the heating tube 12 may be 25-31 mm. The inner wall of the heating tube 12 defines a heating cavity 120 for accommodating and heating the aerosol generating substrate 200 . The cross section of the heating cavity 120 is a regular triangular prism, and the three edges are connected by arc transitions. The cross-sectional outline of the heating chamber 120 has a maximum inscribed circle whose diameter is smaller than the outer diameter of the aerosol-generating substrate 200 before being extruded. When the aerosol-generating substrate 200 is inserted into the heating cavity 120 , at least part of the cavity wall of the heating cavity 120 can press the aerosol-generating substrate 200 , prompting the aerosol-generating substrate 200 to deform radially inward.

The heating pipe 12 can be made of metal or non-metal material with high thermal conductivity. The outer wall of the heating tube 12 may be provided with a heating component 17, and the heating component 17 includes a heating element and/or a circuit board. In this embodiment, the heating component 17 includes a flexible circuit board and a thick film heating element disposed on the flexible circuit board. In other embodiments, the heating component 17 may also only include a heating element or a circuit board, the heating element may be a heating film, a heating sheet or a heating wire, and the circuit board may be a flexible circuit board or a rigid circuit board.

The guide part 11 can be injection-molded with a high-temperature-resistant high-molecular polymer, such as PEEK (polyetheretherketone), high-temperature nylon, and the like. The guide member 11 may include a main body 115 , an end wall 116 extending outward from an outer wall of the main body 115 , and a ring wall 117 extending downward from the end wall 116 . The inner wall of the main body 115 defines the opening cavity 114 and the introduction cavity 110 . The cross-sectional shape of the opening 114 can match the cross-sectional shape of the aerosol-generating substrate 200 before being squeezed. In this embodiment, the cross-sectional shape of the opening 114 is circular. The cross-sectional area of the opening 114 may be greater than or equal to the cross-sectional area of the aerosol-generating substrate 200 before being squeezed. The introduction cavity 110 has a first end 111 away from the heating tube 12 and a second end 112 close to the heating tube 12 . The first end 111 of the introduction cavity 110 communicates with the lower end of the opening cavity 114 , and the cross-sectional shape of the introduction cavity 110 at the first end 111 can match the cross-sectional shape of the opening cavity 114 . The cross-sectional area of the introduction cavity 110 at the first end 111 may be smaller than or equal to the cross-sectional area of the opening cavity 114 .

The cross-sectional area of the second end 112 of the introduction cavity 110 is smaller than the cross-sectional area of the 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 match the cross-sectional shape and area of the heating chamber 120 . The introduction cavity 110 can adopt a gradual transition from the first end 111 to the second end 112 , that is, the cross-sectional shape of the introduction cavity 110 gradually changes from a circle at the first end 111 to a regular triangular prism at the second end 112 . The outer cross-sectional shape of the main body portion 115 can match the cross-sectional shape of the introduction cavity 110 .

The end wall 116 can be formed by extending radially outward from the outer wall surface of the first end 111 of the main body 115 . The ring wall 117 can be tightly embedded in the upper opening of the outer tube 16 , and can be formed by extending vertically downward from the outer ring of the end wall 116 . The cross-section of the ring wall 117 can be circular, and an annular receiving space is formed between the inner wall surface of the ring wall 117 and the outer wall surface of the main body 115 for receiving the first heat insulating member 155 .

The support arm 13 can be embedded in the opening of the lower end of the heating pipe 12, which can be made of metal or non-metal material with high thermal conductivity. The middle part of the support 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 achieve support and positioning.

The outer tube 16 can be in the shape of a round tube, and can be made of metal with high thermal conductivity, including stainless steel, copper alloy, aluminum alloy, etc., such as 430 stainless steel, copper or copper alloy. Alternatively, the outer tube 16 can also be made of non-metallic materials such as ceramics with high thermal conductivity, including alumina, silicon carbide, aluminum nitride, silicon nitride and the like. The outer tube 16 is made of high thermal conductivity material, which is beneficial to the uniform heating of the heating element 1 .

In addition, the heating assembly 1 in this embodiment may further include a heat insulation assembly 15 disposed between the outer pipe 16 and the heating pipe 12 . The heat insulation component 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 that are sheathed outside the heating tube 12 in sequence. The material of the first heat insulation layer 151 and the third heat insulation layer 153 can be one or more of airgel, asbestos, glass fiber, polyether ether ketone, imide, polyetherimide or ceramics. combination, preferably an aerogel. The material of the heat dissipation layer 154 may be graphite sheet or graphene sheet.

The second heat insulation layer 152 can be a vacuum tube. The heat insulation assembly 15 may further include a first heat insulation element 155 and a second heat insulation element 156 respectively disposed at two axial ends of the vacuum tube. The first heat insulator 155 and the second heat insulator 156 can be made of low thermal conductivity materials, preferably elastic materials with low thermal conductivity such as silicone. The high-temperature regions at both ends of the vacuum tube are respectively wrapped by the first heat insulating member 155 and the second heat insulating member 156 to realize heat insulation and sealing functions. It can be understood that in other embodiments, the heat insulation assembly 15 can also be composed of only one or several of the first heat insulation layer 151, the second heat insulation layer 152, the third heat insulation layer 153, and the heat dissipation layer 154. The relative positional relationship of the first heat insulation layer 151, the second heat insulation layer 152, the third heat insulation layer 153, and the heat dissipation layer 154 can also be adjusted as required, for example, the heat dissipation layer 154 can also be arranged on the first heat insulation layer 151 and the second 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 can be made of high temperature resistant materials such as PEEK, and can be tightly sleeved between the inner wall of the outer tube 16 and the outer wall of the second heat insulating member 156 .

In addition, the heating assembly 1 can also include a temperature detection element 19, which can be installed at the bottom of the support arm 13 to detect the temperature of the bottom of the aerosol generating substrate 200, and also detect the number of suction ports through temperature changes. The temperature detection element 19 may be a thermistor with a negative temperature coefficient, and may be clamped between the support arm 13 and the second heat insulating member 156 .

18-19 show an aerosol generating device 100 in some embodiments of the present invention. The aerosol generating device 100 may be roughly rectangular and columnar and may include a housing 2, a heating assembly 1 and a main board disposed in the housing 2. 3 and battery 4. Wherein, the heating assembly 1 can adopt the heating assembly structure in any of the above-mentioned embodiments. It can be understood that, in other embodiments, the aerosol generating device 100 is not limited to be in the shape of a rectangular column, and it can also be in other shapes such as a square column, a cylinder, an ellipse column, and the like.

The top of the housing 2 is provided with a socket 20 for inserting the aerosol generating substrate 200. The cross-sectional shape and size of the socket 20 are compatible with the cross-sectional shape and size of the aerosol generating substrate 200. The aerosol generating substrate 200 can be inserted through the socket. 20 is inserted into the heating component 1 and contacts the inner wall of the heating component 1 . After the heating component 1 is energized and generates heat, it can transfer heat to the aerosol generating substrate 200 , so as to realize the baking and heating of the aerosol generating substrate 200 . The main board 3 is electrically connected to the battery 4 and the heating assembly 1 respectively. A related control circuit is arranged on the main board 3 , and the on-off connection between the battery 4 and the heating assembly 1 can be controlled by the switch 5 provided on the casing 2 . A dustproof cover 6 for covering or exposing the socket 20 may also be provided on the top of the housing 2 . When the aerosol generating device 100 is not needed, the dust-proof cover 6 can be pushed to cover the socket 20 to prevent dust from entering the socket 20 . When needed, push the dust-proof cover 6 to expose the socket 20 so that the aerosol-generating substrate 200 can be inserted through the socket 20 .

The aerosol-generating substrate 200 may include an outer covering 210 and an atomizing substrate 220 disposed on the inner bottom of the outer covering 210 . Wherein, the outer wrapping layer 210 may be outer wrapping paper. The atomized substrate 220 can be a material used for medical treatment or health preservation, for example, plant-like materials such as plant roots, stems, leaves, etc. in solid sheet or filament form. The aerosol generating device 100 bakes and heats the aerosol generating substrate 200 inserted therein at a low temperature, so as to release the aerosol extract in the atomized substrate 220 without burning. Further, the aerosol generating substrate 200 may also include a hollow supporting section 230 , a cooling section 240 and a filtering section 250 arranged in the outer cladding 210 and sequentially arranged above the atomizing substrate 220 in the longitudinal direction. The cross-sectional shape of the aerosol-generating substrate 200 is not limited to being circular, and it can also be in other shapes such as ellipse, square, and polygon.

It can be understood that the above technical features can be used in any combination without limitation.

Above embodiment has only expressed the specific implementation manner of the present invention, and its description is comparatively specific and detailed, but can not therefore be interpreted as the limitation of patent scope of the present invention; It should be pointed out that, for those of ordinary skill in the art, in Under the premise of not departing from the concept of the present invention, the above-mentioned technical features can be freely combined, and some deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations made with the scope of the claims of the present invention All modifications and modifications shall fall within the scope of the claims of the present invention.

Claims

A guide component used for a heating assembly of an aerosol generating device, characterized in that an introduction cavity (110) for introducing an aerosol generating matrix (200) is formed inside the guide component (11), and the introduction cavity ( 110) has a first end (111) and a second end (112) oppositely arranged, the cross-sectional shapes of the first end (111) and the second end (112) are different, and the introduction cavity (110) The cross-sectional area of the second end (112) is smaller than the cross-sectional area of the first end (111), and the introduction cavity (110) is from the first end (111) to the second end (112) is a gradient transition.
The guiding component according to claim 1, characterized in that, the cross-sectional area of the second end (112) of the introduction cavity (110) is smaller than or equal to the cross-sectional area of the aerosol generating matrix (200) .
The guide component according to claim 1, characterized in that, the cross-sectional shape of the second end (112) of the introduction cavity (110) is non-circular.
The guide component according to claim 1, characterized in that, the cross-sectional shape of the second end (112) of the introduction cavity (110) is polygonal.
The guide member according to claim 4, characterized in that the polygon comprises a regular polygon or a Lello polygon.
The guiding component according to claim 1, characterized in that, the cross-sectional shape of the first end (111) of the introduction cavity (110) matches the cross-sectional shape of the aerosol generating matrix (200) .
The guiding component according to claim 1, characterized in that, the cross-sectional area of the first end (111) of the introduction cavity (110) is greater than or equal to the cross-sectional area of the aerosol generating matrix (200) .
The guide component according to claim 1, characterized in that, the cross-sectional shape of the first end (111) of the introduction cavity (110) is circular or polygonal.
The guide part according to any one of claims 1-8, characterized in that, a transition chamber (113) is formed in the guide part (11), and the transition chamber (113) is connected with the introduction chamber (110 ) The second end (112) is connected.
The guide component according to claim 9, characterized in that, the cross-sectional shape of the transition cavity (113) matches the cross-sectional shape of the second end (112) of the introduction cavity (110).
The guide member according to any one of claims 1-8, characterized in that, an opening cavity (114) is formed in the guide component (11), and the opening cavity (114) is connected with the introduction cavity (110 ) The first end (111) is connected.
The guide component according to claim 11, characterized in that, the cross-sectional shape of the opening (114) matches the cross-sectional shape of the aerosol generating substrate (200).
The guide component according to claim 11, characterized in that, the cross-sectional area of the opening (114) is greater than or equal to the cross-sectional area of the first end (111) of the introduction cavity (110).
The guide part according to any one of claims 1-8, characterized in that, the guide part (11) is injection-molded with high molecular polymer.
A heating assembly, characterized in that it comprises a heating tube (12) and a guiding component (11) according to any one of claims 1-14 connected to the heating tube (12), the heating tube (12 ) is formed with a heating cavity (120) for accommodating the aerosol generating substrate (200), and the heating cavity (120) communicates with the second end (112) of the introduction cavity (110).
The heating assembly according to claim 15, characterized in that, the cross-sectional profile of the heating cavity (120) has a maximum inscribed circle, and the diameter of the maximum inscribed circle is smaller than that of the aerosol generating substrate (200) the outer diameter.
The heating assembly according to claim 15, characterized in that, when the heating cavity (120) accommodates the aerosol generating substrate (200), the outer wall surface of the aerosol generating substrate (200) and the At least one air flow channel (121) is also formed between the cavity walls of the heating cavity (120).
An aerosol generating device, characterized by comprising the heating assembly according to any one of claims 15-17.