Aerosol-generating article and preparation method therefor

Abstract

Disclosed in the present application are an aerosol-generating article and a preparation method therefor. The aerosol-generating article comprises a cylindrical housing, and a substrate section and a heating member which are provided in the housing. The aerosol-generating article has a first end and a second end opposite to each other. The heating member comprises a heating body; and the heating body comprises a first heating element attached to the end surface of the substrate section close to the second end, and an edge of the first heating element is hermetically connected to the inner wall of the housing, so that the first heating element is hermetically blocked on the side of the substrate section close to the second end. The side wall of the housing located from the first heating element to the first end is provided with a penetrating air inlet hole.

Description

Aerosol-generating article and method of manufacturing the same

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 2024109851915, filed on July 22, 2024, entitled “Aerosol-generating article and method of manufacturing the same”, and to Chinese Patent Application No. 2024109851845, filed on July 22, 2024, entitled “Aerosol-generating article and method of manufacturing the same”, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of aerosol-generating, in particular to an aerosol-generating article and a method of manufacturing the same. BACKGROUND

[0004] The heat-not-burn aerosol-generating article is an important development direction of the future tobacco industry because it avoids the generation of fly ash and harmful smoke by using a non-combustion heating method.

[0005] The aerosol-generating article includes an aerosol-generating substrate. In use, the aerosol-generating substrate is accommodated in a heating device, and the heating device heats the aerosol-generating substrate of the aerosol-generating article. After being heated, the aerosol-generating substrate generates an aerosol for a user to smoke. However, because the aerosol-generating article generates residues after being heated, the residues accumulate in the heating device, pollute the device body, affect use, and even produce an odor. Therefore, after multiple uses, the heating device needs to be cleaned, and the user experience is poor. SUMMARY

[0006] The present application provides an aerosol-generating article and a method of manufacturing the same, which can reduce residues of the aerosol-generating article left in a heating device in use.

[0007] In one embodiment, an aerosol-generating article is provided, which has opposite first and second ends, includes a cylindrical shell, a substrate segment and a heating element arranged in the shell, and the heating element includes a heating body, the heating body includes a first heating element, which is arranged in close contact with an end face of the substrate segment close to the second end, and the edge of the first heating element is in sealing contact with the inner wall of the shell, so that the first heating element is sealed and blocked on one side of the substrate segment close to the second end. The shell is provided with an air inlet hole penetrating the side wall from the first heating element to the first end.

[0008] In one embodiment, the heating element further comprises at least one second heating element spaced apart from the first heating element, the second heating element being arranged transversely in the substrate segment; when the second heating element is a plurality, the second heating elements are arranged spaced apart in the axial direction of the shell.

[0009] In one embodiment, the first heating element is integrally formed with the heat conductor, and the second heating element is detachably connected with the heat conductor.

[0010] In one embodiment, the heat conductor is detachably connected with the second heating element, and a positioning structure is arranged between the heat conductor and the second heating element to fix the second heating element at a specific position of the heat conductor.

[0011] In one embodiment, the heating element further comprises a heat conductor, one end of which is connected with the first heating element and the other end of which extends into the substrate segment.

[0012] In one embodiment, the heat conductor is a strip-shaped heat conductor.

[0013] In one embodiment, the heat conductor is made of one or more of graphite powder, graphene, boron nitride, aluminum oxide, and carbon powder, or the thermal conductivity of the heat conductor is 1-500 W / m.k, or the heat conductor and the heating body are both made of magnetic induction heating material.

[0014] In one embodiment, when the aerosol generating article is used in cooperation with a heating device, the heating temperature of the heating body is higher than the temperature of the heat conductor, and the temperature difference between the heating body and the heat conductor is 20-80℃.

[0015] In one embodiment, a gap exists between the second heating element and the inner wall of the shell; and / or the second heating element is provided with a through hole arranged in the axial direction of the shell.

[0016] In one embodiment, the substrate segment comprises granular smoking material.

[0017] A gap exists between the second heating element and the inner wall of the shell, and the size of the smoking material is configured to pass through the gap; or

[0018] The second heating element is provided with a through hole arranged in the axial direction of the shell, and the size of the smoking material is configured to pass through the through hole; or

[0019] A gap exists between the second heating element and the inner wall of the shell, and the second heating element is provided with a through hole arranged in the axial direction of the shell, and the size of the smoking material is configured to pass through the through hole and / or the gap.

[0020] In one embodiment, the first heat-generating element and the second heat-generating element are inductive heat-generating elements.

[0021] In one embodiment, the air inlet hole is arranged through the side wall of the housing wrapped with the substrate section.

[0022] In one embodiment, the air inlet hole includes one or more, and the opening size of a single air inlet hole is 0.05-3mm; and / or,

[0023] The distance between the air inlet hole and the end face of the substrate section close to the second end is 1-20mm.

[0024] In one embodiment, the aerosol-generating article is provided with a spacing section on the side of the first heat-generating element close to the second end.

[0025] In one embodiment, the spacing section includes a cavity part, and the housing forms the cavity part between the first heat-generating element and the second end; and / or, the spacing section includes a heat insulation member connected with the housing and sealing the second end or the side of the first heat-generating element close to the second end; or, the spacing section includes a heat insulation layer arranged on the outer surface of the first heat-generating element.

[0026] In one embodiment, further comprising a heat resistance member arranged between the heating member and the inner wall of the housing to separate the heating member and the housing.

[0027] In one embodiment, further provided is a preparation method of an aerosol-generating article for preparing the aerosol-generating article described in any one of the above embodiments, the preparation method comprising the following steps: providing a housing; opening an air inlet hole on the housing; arranging a heating member in the housing, wherein the heating member includes a first heat-generating element, the first heat-generating element is arranged transversely close to the second end, and the edge of the first heat-generating element is sealed to the inner wall of the housing to form a mounting cavity; and loading smoking material into the mounting cavity from the first end.

[0028] According to the aerosol-generating article and the preparation method thereof in the above embodiments, by arranging the first heat-generating element transversely at one end of the substrate section, the contact area between the first heat-generating element and the substrate section is increased, and when the first heat-generating element is used for heating, the first heat-generating element can block the leakage of the material of the substrate section from the aerosol-generating article while heating the substrate section, which can achieve the effect of significantly reducing the residue. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a structural schematic diagram of an aerosol-generating article in one embodiment;

[0030] FIG. 2 is a structural schematic diagram of an aerosol generating article according to another embodiment;

[0031] FIG. 3 is a structural schematic diagram of an aerosol generating article according to another embodiment;

[0032] FIG. 4 is a structural schematic diagram of an aerosol generating article according to another embodiment;

[0033] FIG. 5 is a structural schematic diagram of an aerosol generating article according to another embodiment;

[0034] FIG. 6 is a structural schematic diagram of an aerosol generating article according to another embodiment;

[0035] FIG. 7 is a structural exploded schematic diagram of a heating element of an aerosol generating article according to an embodiment;

[0036] FIG. 8 is a structural exploded schematic diagram of a heating element of an aerosol generating article according to another embodiment;

[0037] FIG. 9 is a structural exploded schematic diagram of a heating element of an aerosol generating article according to another embodiment;

[0038] FIG. 10 is a structural schematic diagram of an aerosol generating system according to an embodiment;

[0039] FIG. 11 is a flow schematic diagram of a method of manufacturing an aerosol generating article according to an embodiment;

[0040] FIG. 12 is a flow schematic diagram of a method of manufacturing an aerosol generating article according to an embodiment;

[0041] FIG. 13 is a flow schematic diagram of a method of manufacturing an aerosol generating article according to an embodiment;

[0042] In the drawings, reference numbers 10 denote an aerosol generating article, 11 a housing, 111 a first end, 112 a second end, 113 an air inlet hole, 114 a gap, 12 a substrate section, 13 a heating element, 131 a first heating element, 132 a second heating element, 1321 a through hole, 1322 a mounting hole, 14 a heat conductor, 141 a positioning step, 142 a detent structure, 15 a spacer section, 151 a cavity portion, 152 a thermal insulation member, 153 a thermal insulation layer, 16 a flavor carrying section, 17 a cooling section, 18 a filter section, 19 a heat blocking member, 20 a heating device, 21 an insertion space, and 22 a magnetic field generator. DETAILED DESCRIPTION

[0043] The application will be described in further detail below with specific reference to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that some features, which are not necessarily the most important to implementation, can be left out in some embodiments. In other instances, well-known structures and methods can be shown without detail in order not to obscure the underlying principles of the application. The description and drawings are to be regarded as illustrative in nature and definitions in the specification should be interpreted as follows:

[0044] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that can be easily seen by those skilled in the art. Therefore, the order in the specification and drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0045] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connections (couplings).

[0046] In the related art, the aerosol generating article generates residues after heating, which accumulates in the heating device and contaminates the device body. In this application, by laterally arranging the first heating element 131 at one end face of the substrate segment 12, the contact area between the first heating element 131 and the substrate segment 12 is increased, and the heating effect is better. When the heating is used, the first heating element 131 heats the substrate segment 12, and at the same time, it can prevent the material of the substrate segment 12 from leaking out of the aerosol generating article, which can significantly reduce the residues.

[0047] In one embodiment, as shown in FIG. 1, an aerosol generating article is provided, including a cylindrical shell 11, a substrate segment 12, and a heating element 13, etc.

[0048] The aerosol generating article has opposite first and second ends 111 and 112. The first end 111 can be a proximal lip end, i.e., the first end 111 is the end that is drawn upon by a user during smoking; the second end 112 can be a distal lip end, i.e., the second end 112 is the end that is drawn away from the user during smoking. The axial length of the shell 11 is similar to the axial length of the aerosol generating article, and the first and second ends 111 and 112 can also be regarded as the first and second ends 111 and 112 of the shell 11.

[0049] The substrate segment 12 is arranged in the shell 11, and the smoking material in the substrate segment 12 generates aerosol for a user to draw upon when the aerosol generating article is heated. The substrate segment 12 can also be defined as a smoking segment in some embodiments.

[0050] The heating piece 13 includes a heating element, which includes a first heating element 131 arranged in close contact with the end face of the substrate segment 12 near the second end 112. The edge of the first heating element 131 is in sealing contact with the inner wall of the shell 11, so that the first heating element 131 is sealed and blocked on the side of the substrate segment 12 near the second end 112. By using the first heating element 131 as a sealing piece, the side of the shell 11 near the second end 112 is blocked, so that the aerosol can only flow in the direction of the first end 111; at the same time, the material of the substrate segment 12 is prevented from leaking out of the aerosol generating article, which can significantly reduce the amount of residue, reduce the frequency of cleaning the heating device, and can heat the end face of the substrate segment 12 in a surface heating manner to improve the smoking effect.

[0051] The side wall of the shell 11 near the first end 111 has a gas inlet hole 113 penetrating through it to introduce external airflow to carry out the aerosol generated by the substrate segment 12.

[0052] In use, the aerosol generating article is placed in the heating device, which has a magnetic field generator, such as an induction heating coil, and the magnetic field generator 22 generates a magnetic field to heat the first heating element 131. The heat generated by the first heating element 131 is transferred to the substrate segment 12 to heat the substrate segment 12 to generate aerosol. When a user draws, external airflow enters the shell 11 through the gas inlet hole 113 to carry out the aerosol.

[0053] By arranging the first heating element 131 in close contact with the end face of the substrate segment 12 near the second end 112, the entire end face of the substrate segment 12 can be directly heated during heating, and the middle and surrounding parts of the substrate segment 12 can be heated at the same time, so that the problem of insufficient heat around the periphery to generate aerosol does not occur, and the heating effect is good. Furthermore, the first heating element 131 seals the side of the substrate segment 12 near the second end 112, and the airflow is introduced through the gas inlet hole 113 in the side wall to carry out the aerosol generated by heating.

[0054] In some embodiments, the first heating element 131 can be a solid design, i.e. a structure that separates its two sides, which can act as a seal to block the end face of the shell 11 at the second end 112, so that the aerosol flows in the direction of the first end 111, and to some extent, blocks the leakage of the material of the substrate section 12. The first heating element 131 can be a solid cylinder, sealed and blocked at the end face of the shell 11, or blocked at the inner side of the end face of the shell 11. In some embodiments, the first heating element 131 can also be provided with a plurality of through holes, so that external air can directly enter the substrate section 12 through the through holes, and carry out the generated aerosol.

[0055] In an embodiment, the aerosol generating article further comprises a heat conductor 14. The heat conductor 14 is connected to the heating element, wherein one end of the heat conductor 14 is connected to the first heating element 131, and the other end extends into the substrate section 12. In addition to directly heating the substrate section 12, the heat generated by the first heating element 131 can also be transferred to the heat conductor 14, and then conducted into the middle of the substrate section 12 by the heat conductor 14, thereby increasing the heating area of the substrate section 12 and improving the smoking speed.

[0056] In some embodiments, the heat conductor 14 is a sheet formed by recombining high thermal conductivity material powder, for example, the heat conductor 14 can be made of one or more of graphite powder, graphene, boron nitride, aluminum oxide, carbon powder, or other high thermal conductivity material powder. In some embodiments, the thermal conductivity coefficient of the heat conductor 14 can be 1-500 W / m.k.

[0057] In some embodiments, the heat conductor 14 is made of a non-magnetic induction material, mainly for heat conduction. In other embodiments, the heat conductor 14 and the heating element (the first heating element 131 and / or the second heating element 132) can both be magnetic induction heating materials.

[0058] In some embodiments, when the aerosol generating article is used in cooperation with the heating device 20, and the aerosol generating article is heated in the induction heating magnetic field, the heating temperature of the heating element 13 is higher than the temperature of the heat conductor 14, i.e. the first heating element 131 and the second heating element 132 are both higher than the heat conductor 14, and the temperature difference between the heating element 13 (the first heating element 131 and the second heating element 132) and the heat conductor 14 is in the range of 20-80℃. In this way, the substrate section 12 smokes faster at a higher temperature, and smokes slower at a lower temperature, so as to achieve the continuity of smoking.

[0059] In some embodiments, the heat-conducting body 14 is a strip-shaped heat-conducting body made of a heat-conducting material, which can be a strip-shaped or columnar heat-conducting body, for example, to transfer the heat generated by the heat-generating body to the substrate section 12. When a strip-shaped heat-conducting body is used, the contact area with the substrate section 12 can be increased, and the heat transfer speed can be improved. When a columnar heat-conducting body is used, the strength of the heat-conducting body can be increased, and the structural stability of the product can be ensured. In some embodiments, the heat-conducting body 14 can be arranged along the length direction of the substrate section 12 and at the axial position of the substrate section 12, so that the substrate section 12 can be heated from the center, and the heat transfer efficiency can be improved. The shape of the heat-conducting body 14 can be designed in various shapes as needed, such as a wave shape, a spiral shape, and the like, to further improve the uniformity of heating of the substrate section 12. The shape of the heat-conducting body 14 can be designed in various shapes as needed.

[0060] In some embodiments, the air inlet hole 113 is arranged through the side wall of the shell 11 wrapped with the substrate section 12. When smoking, the external airflow can directly enter the substrate section 12 to quickly take out the aerosol generated by the substrate section 12. The opening position of the air inlet hole 113 can be adjusted according to actual needs. In some embodiments, the air inlet hole 113 is arranged at the lower outer periphery of the substrate section 12, and the distance between the air inlet hole 113 and the end surface of the substrate section 12 close to the second end 112 is 1-20 mm, so that more external airflow can pass through the substrate section 12, which is more conducive to taking out the generated aerosol.

[0061] In an embodiment, the air inlet hole 113 includes one or more, and the opening size of a single air inlet hole 113 is 0.05-3 mm. The shape of the air inlet hole 113 can be one or more of a circular hole, a square hole, an elliptical hole, a polygonal hole, and an irregularly shaped hole, and the opening size is the maximum width of the outline of the opening, such as the diameter of a circular hole or the long diameter of an elliptical hole.

[0062] In some embodiments, the air inlet hole 113 can be multiple, which are uniformly distributed around the substrate section 12, so that the air inlet is more uniform.

[0063] In an embodiment, as shown in FIG. 2, the heating element 13 can further include one or more second heat-generating elements 132 arranged on one side of the first heat-generating element 131 close to the first end 111. The second heat-generating element 132 is arranged in a spaced manner with the first heat-generating element 131, and the second heat-generating element 132 is arranged transversely in the substrate section 12, so that the substrate section 12 can be heated from the inside.

[0064] The first heating element 131 is arranged transversely to the end face of the substrate segment 12 close to the second end 112. When heated, the first heating element 131 can directly heat the entire end face of the substrate segment 12, and the contact area between the first heating element 131 and the substrate segment 12 is large. Therefore, the heating of the center and the periphery of the substrate segment 12 is more uniform, and the problem of poor smoking effect caused by insufficient temperature of the periphery of the center heating method is solved. In addition, the second heating element 132 is arranged in the substrate segment 12, which can further improve the smoking effect in the substrate segment 12. In this way, the first heating element 131 and the second heating element 132 can heat the substrate segment 12 from different layers in the length direction of the substrate segment 12, which can further improve the smoking effect in the substrate segment 12 and improve the user experience.

[0065] When the second heating element 132 is one layer, the second heating element 132 and the first heating element 131 are arranged at a set distance in the axial direction of the substrate segment 12. The second heating element 132 is arranged in the substrate segment 12, which can better heat the smoking material in the substrate segment 12. In some embodiments, one end of the heat conductor 14 is connected to the first heating element 131, and the heat conductor 14 extends into the substrate segment 12 and is connected to the second heating element 132. In some embodiments, the first heating element 131 is arranged at one end of the heat conductor 14, the heat conductor 14 is arranged in the length direction of the shell, and the second heating element 132 can be arranged on the heat conductor 14 in the length direction of the heat conductor 14. The heat conductor 14 can be used as a mounting member of the second heating element 132, and can also transfer heat from the first heating element 131 to the second heating element 132, thereby playing a heat conducting role.

[0066] As shown in FIG. 6, when the second heating element 132 is multiple, the second heating element 132 close to the second end 112 and the first heating element 131 are arranged at a set distance in the axial direction of the substrate segment 12, and the multiple second heating elements 132 are arranged in the substrate segment 12 in the axial direction of the substrate segment 12. By arranging one or more second heating elements 132, the first heating element 131 and each second heating element 132 are distributed at intervals, respectively providing energy to the substrate segment 12 in each layer, and then the heat can be quickly and uniformly transferred to the substrate segment 12, which can further improve the speed of aerosol generation to improve the user experience.

[0067] In some embodiments, the first heating element 131 is an inductive heating element, which can inductively receive energy from a field and generate heat. In some embodiments, both the first heating element 131 and the second heating element 132 are inductive heating elements, such as magnetic inductive heating elements. In use, the aerosol generating substrate is installed into a heating device having a magnetic field generator 22 that matches the first heating element 131 and the second heating element 132. By placing the aerosol generating article in the heating device, the inductive heating coil of the heating device generates a magnetic field, and the first heating element 131 and the second heating element 132 generate heat in response to the magnetic field, thereby heating the substrate segment 12. The magnetic field generator 22 can be an inductive heating coil.

[0068] Of course, in other embodiments, the first heating element 131 and the second heating element 132 can be resistive heating elements or other types of heating elements.

[0069] In an embodiment, the periphery of the first heating element 131 and the second heating element 132 is close to the inner wall of the housing 11. The first heating element 131 and the second heating element 132 can be in the form of a sheet or a mesh. The cross-sectional shape of the first heating element 131 and the second heating element 132 matches the cross-sectional shape of the substrate segment 12, such as a circular shape. In an embodiment, the housing 11 is a cylindrical housing, and the substrate segment 12 is filled in a segment of the housing. The first heating element 131 and the second heating element 132 are in the form of a mesh, a circular sheet, a cylinder, or the like, and the cross-sectional area of the first heating element 131 and the second heating element 132 is close to the cross-sectional area of the substrate segment 12. In this way, the contact area between the first heating element 131, the second heating element 132, and the substrate segment 12 is ensured.

[0070] In some embodiments, the cross-sectional shape of the first heating element 131 is substantially the same as the cross-sectional shape of the housing 11. The edge of the first heating element 131 is sealed to the inner wall of the housing 11, thereby blocking the end of the housing 11 and preventing the material of the substrate segment 12 from leaking out.

[0071] In an embodiment, the first heating element 131 is a gas-impermeable structure. In a cylindrical aerosol generating article, the first heating element 131 can be a solid circular sheet having a thickness of 0.1 mm to 8 mm. The second heating element 132 can also be a circular sheet having a thickness of 0.1 mm to 8 mm.

[0072] In an embodiment, the second heating element 132 is in communication with the side of the first end 111 close to the second end 112, i.e. in a ventilated state, to ensure that the aerosol generated can pass through the second heating element 132 from the first end 111 for suction. There can be a gap 114 between the second heating element 132 and the inner wall of the shell 11; or the second heating element 132 is provided with a through hole 1321 arranged axially along the shell 11, or other microporous structure, to form a passage for airflow. Of course, the gap 114 and the through hole 1321 can be provided at the same time. The second heating element 132 can be a mesh structure, and the mesh holes are the through holes 1321 at this time. When the user inhales, the airflow entering from the air inlet hole 113 can flow through the gap 114 or the through hole 1321 to carry out the aerosol of the substrate section 12 to the first end 111 for the user to inhale.

[0073] In some embodiments, the second heating element 132 has a passage between the side close to the first end 111 and the side close to the second end 112, and the size of the smoking material is configured to pass through the passage; in some embodiments, there is a gap 114 between the second heating element 132 and the inner wall of the shell 11, and the gap 114 forms a passage, and the size of the smoking material is configured to pass through the gap 114; in some embodiments, the second heating element 132 is provided with a through hole 1321 arranged axially along the shell 11, and the size of the smoking material is configured to pass through the through hole 1321, and the through hole 1321 forms a passage; in some embodiments, there is a gap 114 between the second heating element 132 and the inner wall of the shell 11, and the second heating element 132 is provided with a through hole 1321 arranged axially along the shell 11, and the size of the smoking material is configured to pass through the through hole 1321 and / or the gap 114. The substrate section can be made of smoking material, and the smoking material can be selected from smoking particles.

[0074] By providing the gap 114 and / or the through hole 1321, when the smoking material of the substrate section 12 is loaded, it can enter the space of the first heating element 131 and the second heating element 132 through the gap 114 and / or the through hole 1321, and form part of the substrate section 12.

[0075] In some embodiments, the heating element and the heat conductor 14 are integrally formed, so as to simplify assembly and reduce production cost.

[0076] In some embodiments, the first heating element 131 and the heat conductor 14 are integrally formed, so as to simplify assembly and reduce production cost.

[0077] In some embodiments, the first heating element 131 and the heat conductor 14 are detachably connected to reduce production difficulty.

[0078] In some embodiments, the second heating element 132 can be integrally formed with the heat conducting body 14, so that the assembly can be simplified and the production cost can be reduced.

[0079] In some embodiments, the second heating element 132 is detachably connected with the heat conducting body 14, so that the production difficulty can be reduced.

[0080] In some embodiments, the first heating element 131 is integrally formed with the heat conducting body 14, and the second heating element 132 is detachably connected with the heat conducting body 14.

[0081] In some embodiments, the heat conducting body 14 is detachably connected with the second heating element 132, and a positioning structure is arranged between the heat conducting body 14 and the second heating element 132 to fix the second heating element 132 at a specific position of the heat conducting body 14. Each second heating element 132 is provided with a mounting hole 1322, and the inner diameter of the mounting hole 1322 is matched with the positioning structure, so that the second heating element 132 is positioned at a position away from the first heating element 131, and the second heating element 132 is spacedly mounted on the heat conducting body 14.

[0082] In some embodiments, the heat conducting body 14 is provided with a plurality of spaced positioning steps 141 along the length direction, and each second heating element 132 is provided with a mounting hole 1322 matched with the positioning steps 141. The second heating element 132 is spacedly mounted on the heat conducting body 14 by matching the positioning steps 141 and the mounting hole 1322. In some embodiments, as shown in FIG. 7, the positioning structure can be the positioning steps 141 arranged on the heat conducting body 14. The inner diameter of the mounting hole 1322 of the second heating element 132 is smaller than the diameter of the positioning steps 141. Since the positioning steps 141 are located at a position of the heat conducting body 14 away from the first heating element 131 by a certain distance, when the second heating element 132 is mounted, the second heating element 132 can be positioned at the positioning steps 141 to form a spaced arrangement with the first heating element 131. In the embodiment with a plurality of second heating elements 132, the positioning steps 141 can also be a plurality, and the diameters of the plurality of positioning steps 141 increase from the first end 111 to the second end 112. Correspondingly, the diameters of the mounting holes 1322 of the second heating elements 132 also increase from the first end 111 to the second end 112.

[0083] In some embodiments, the heat-conducting body 14 is provided with at least one spacing structure 142 along the length direction, and the second heating element 132 is clamped on the spacing structure 142. In some embodiments, as shown in FIG. 8, the spacing structure can be the spacing structure 142 provided on the heat-conducting body 14. The diameter of the spacing structure 142 is larger than that of the heat-conducting body 14, and is located at a position away from the first heating element 131 by a certain distance. Correspondingly, the inner diameter of the mounting hole 1322 of the second heating element 132 is smaller than the diameter of the spacing structure 142. When the second heating element 132 is installed, the second heating element 132 can be positioned at the spacing structure 142, and is spaced apart from the first heating element 131. In embodiments with multiple second heating elements 132, the spacing structure 142 can also be multiple, and the diameters of the multiple spacing structures 142 increase from the first end 111 to the second end 112. Correspondingly, the diameters of the mounting holes of the second heating elements 132 also increase from the first end 111 to the second end 112.

[0084] In some embodiments, as shown in FIG. 9, the spacing structure is a variable-diameter structure of the heat-conducting body 14 itself, and the outer diameter of the heat-conducting body 14 increases from the first end 111 to the second end 112. The inner diameter of the mounting hole 1322 of the second heating element 132 is smaller than the maximum outer diameter of the heat-conducting body 14 and larger than the minimum outer diameter of the heat-conducting body 14. When the second heating element 132 is installed, the mounting hole 1322 reaches the position of the heat-conducting body 14 with a diameter substantially equal to it, and the second heating element 132 is clamped and positioned, and is spaced apart from the first heating element 131. In embodiments with multiple second heating elements 132, the diameters of the mounting holes of the second heating elements 132 also increase from the first end 111 to the second end 112, so that the second heating elements 132 can be positioned at different diameter positions of the heat-conducting body 14 and be spaced apart.

[0085] In some embodiments, the substrate segment 12 can be made of smoking material, which includes one or more of smoking particles, smoking sheets, smoking cut filler, or smoking blocks with a microporous structure. In an embodiment, when the smoking material is in the form of particles, the particle size of the smoking material is smaller than the diameter of the minimum inscribed circle of the gap 114 and / or the through hole 1321. For example, when the second heating element 132 is only provided with the through hole 1321, the particle size is smaller than the diameter of the minimum inscribed circle of the through hole 1321. When only the gap 114 is provided between the second heating element 132 and the inner wall of the shell 11, the particle size is smaller than the diameter of the minimum inscribed circle of the gap 114. When the through hole 1321 and the gap 114 are provided at the same time, the particle size of the smoking material is smaller than the diameters of the minimum inscribed circles of the gap 114 and the through hole 1321.

[0086] In some embodiments, the second heating element 132 has a passage between the side close to the first end 111 and the side close to the second end 112, and the size of the smoking material is configured to pass through the passage; in some embodiments, there is a gap 114 between the second heating element 132 and the inner wall of the shell 11, and the gap 114 forms a passage, and the size of the smoking material is configured to pass through the gap 114; in some embodiments, the second heating element 132 is provided with a through hole 1321 arranged axially along the shell 11, and the size of the smoking material is configured to pass through the through hole 1321, and the through hole 1321 forms a passage; in some embodiments, there is a gap 114 between the second heating element 132 and the inner wall of the shell 11, and the second heating element 132 is provided with a through hole 1321 arranged axially along the shell 11, and the size of the smoking material is configured to pass through the through hole 1321 and / or the gap 114. By providing the gap 114 and / or the through hole 1321, when the smoking material of the substrate section 12 is loaded, the gap 114 and / or the through hole 1321 can be used to access the space of the first heating element 131 and the second heating element 132, and form part of the substrate section 12. In some embodiments, the second heating element 132 has a passage between the side close to the first end 111 and the side close to the second end 112, which can be a through hole 1321 formed on the second heating element 132 and / or a gap 114 between the second heating element 132 and the side wall of the shell 11. During assembly, the heating element can be installed as a whole into the shell 11, so that the first heating element 131 is blocked in the shell 11 to form a cavity installation cavity, and when the smoking material is selected as smoking particles, the installation cavity is filled from the first end 111. The smoking particles can fall between the first heating element 131 and the second heating element 132 through the passage, cover all the second heating elements 132 from the side close to the first end, and compact the smoking particles by vibration or other methods, thereby forming the substrate section 12.

[0087] In some embodiments of the heating element, during assembly, the first heating element 131 can be first blocked at the second end 112 of the shell 11, then the smoking material is filled, and then the second heating element 132 is installed. The second heating element 132 can be supported by the smoking material or installed on a heat conductor, and so on. The steps of filling the smoking material and installing the second heating element 132 are repeated as needed.

[0088] In one embodiment, the aerosol generating article is provided with a spacing section 15 on the side of the first heating element 131 close to the second end 112. By providing the spacing section 15, after the aerosol generating article is heated for use, the end face that generates heat is not directly exposed, which can cause burns to the user.

[0089] In some embodiments, the spacing section 15 comprises a cavity portion 151 formed by the housing 11 between the first heating element 131 and the second end 112, and / or the spacing section 15 comprises a thermal insulation member 152 connected with the housing 11 and blocking the second end 112 or a side of the first heating element 131 close to the second end 112, or the spacing section 15 comprises a thermal insulation layer 153 arranged on the outer surface of the first heating element 131. The thermal insulation member 152 and the thermal insulation layer 153 can be made of thermal insulation materials or the like.

[0090] In an embodiment, as shown in FIG. 1, the spacing section 15 comprises the cavity portion 151. The cavity portion 151 is formed by the housing 11 between the first heating element 131 and the second end 112 and is open to the second end 112. The arrangement of the cavity portion 151 allows the first heating element 131 to be located inside the housing 11, avoiding direct exposure of the first heating element 131, thereby avoiding scalding of the user.

[0091] In an embodiment, as shown in FIG. 3, the spacing section 15 comprises the thermal insulation member 152. The thermal insulation member 152 is connected with the housing 11 and blocks the second end 112 or a side of the first heating element 131 close to the second end 112. The arrangement of the thermal insulation member 152 can further reduce the risk of the user directly contacting the magnetic induction heating member and further reduce the risk of scalding.

[0092] In an embodiment, the thermal insulation member 152 can be arranged in the cavity portion 151, and a side of the thermal insulation member 152 close to the second end 112 is located at a distance from the second end 112, thereby further preventing scalding.

[0093] In an embodiment, as shown in FIG. 4, the spacing section 15 comprises the thermal insulation layer 153 arranged on the outer surface of the first heating element 131. The thermal insulation layer 153 can be a thermal insulation film or other thermal insulation materials attached to the outer wall of the first heating element 131. Of course, the first heating element 131 can be exposed to the lower end surface of the housing 11 or located inside the housing 11.

[0094] In an embodiment, the ratio of the height of the cavity portion 151 in the axial direction to the diameter of the cavity portion 151 is greater than or equal to 0.3:1.

[0095] In some embodiments, as shown in FIG. 5, the aerosol generating article further comprises a heat blocking member 19. The heat blocking member 19 is arranged between the heating member 13 and the inner wall of the shell 11 (e.g., the heat blocking member 19 is arranged at the connection between the outer edge of the heating member 13 and the inner wall of the shell 11), thereby spacing the heating member 13 and the inner wall of the shell 11 apart, so that the shell 11 is not heated to produce an odor, affecting the user experience. In some embodiments, the heat blocking member 19 is arranged at least at the portion where the heating member 13 and the inner wall of the shell 11 are close to each other, and the first heating element 131 can be closely fitted with the shell 11 with the heat blocking member 19 in between; the heat blocking member 19 can also wrap around the entire outer periphery of the substrate section 12, or can be arranged on the entire inner wall of the shell 11, which is not limited herein, as long as the heating member 13 and the shell 11 are spaced apart, so that the shell 11 does not produce an odor due to the heating of the heating member 13. The heat blocking member 19 can be an aluminum foil or other heat-resistant and heat-insulating material.

[0096] In an embodiment, the aerosol generating article further comprises: a cooling section 17 and a filter section 18 arranged in the shell 11 in sequence from the second end 112 to the first end 111 inside the substrate section 12. In some embodiments, the aerosol generating article can further comprise a flavor carrying section 16. In some embodiments, the shell 11 can be a paper tube wrapping around the substrate section 12, the flavor carrying section 16, the cooling section 17, and the filter section 18, which is preferably a hard paper tube, or a hollow cylinder made of other materials such as plastic, silica gel, etc. In some embodiments, the flavor carrying section 16 can be omitted.

[0097] In some embodiments, as shown in FIG. 10, the present application further provides an aerosol generating system, comprising a heating device 20 and the aerosol generating article 10 of any of the above embodiments; the heating device 20 comprises an insertion space 21 for inserting the aerosol generating article 10 and a magnetic field generator 22 arranged around the insertion space 21. The magnetic field generator 22 can be an induction heating coil matched with the aerosol generating article 10.

[0098] In an embodiment, the present application further provides a preparation method of an aerosol generating article. As shown in FIG. 11, the preparation method comprises the following steps:

[0099] providing a shell 11;

[0100] opening an air inlet hole 113 on the shell 11. The shell 11 can be a hard paper tube wound from a hard paper, and the air inlet hole 113 can be opened before winding or after the hard paper tube is formed.

[0101] The heating element 13 is arranged in the housing 11, wherein the heating element 13 comprises a first heating element 131, the first heating element 131 is arranged transversely close to the second end 112, and the edge of the first heating element 131 is sealedly connected with the inner wall of the housing 11 to form a mounting cavity;

[0102] The smoking material is filled into the mounting cavity from the first end 111.

[0103] The above steps can be adjusted in sequence as needed.

[0104] In some embodiments, when the smoking material of the substrate section 12 adopts smoking particles, the first heating element 131 can be sealed to close one side of the housing 11 close to the second end 112, to close the bottom of the housing 11 to form a mounting cavity, and then the smoking particles are filled to form the substrate section 12. Of course, in the embodiment provided with the second heating element 132, the through hole 1321 is provided on the second heating element 132, and / or the gap 114 exists between the heating element 132 and the side wall of the housing 11, and the smoking particles can pass through the gap 114 and / or the through hole 1321 to facilitate the filling of the smoking particles.

[0105] In some embodiments, during assembly, the first heating element 131 and the heat conductor can be integrally installed in the housing, wherein the first heating element 131 is first sealed to the second end 112 of the housing 11, then a layer of smoking material is filled, then the second heating element 132 is installed on the side of the filled layer of smoking material close to the first end 111, the second heating element 132 can be supported by the smoking material or installed on the heat conductor, and so on, and the steps of installing the second heating element 132 and filling the smoking material are repeated as needed.

[0106] In one embodiment, the application also provides a preparation method of an aerosol generating article. As shown in FIG. 12, the preparation method comprises the following steps:

[0107] The housing 11 is provided, which is cylindrical or tubular;

[0108] The first heating element 131 and the second heating element 132 are installed in the housing 11 with a mutual interval, the first heating element 131 is arranged transversely close to the second end 112 in the housing 11 and forms a mounting cavity with the housing 11, the second heating element 132 is located in the mounting cavity, and the second heating element 132 has a passage between the side close to the first end 111 and the side close to the second end 112;

[0109] The granular smoking material is filled into the installation cavity from the first end 111, so that the smoking material passes through the passage and enters the space between the first heating element 131 and the second heating element 132, and covers the second heating element 132 from the side close to the first end 111. In some embodiments, a hard paper tube is used as the shell 11.

[0110] In some embodiments, the first heating element 131 and the second heating element 132 can be formed integrally and then installed into the shell 11, that is, the first heating element 131 and the second heating element 132 are connected together by the heat conductor 14 to form a heating element integral which is then installed into the shell 11.

[0111] In some embodiments, the first heating element 131 is arranged close to the second end 112 and leaves a certain space as the spacing section 15 between the first heating element 131 and the second end 112, that is, the first heating element 131 is suspended above the second end 112, preventing the first heating element 131 from being exposed to the shell 11, thereby avoiding the risk of the user directly contacting the first heating element 131 and being scalded when using.

[0112] The application also provides another preparation method of an aerosol generating article. In some embodiments, as shown in FIG. 13, the preparation method comprises the following steps:

[0113] The shell 11 is provided, which is cylindrical or tubular;

[0114] The first heating element 131 is arranged transversely in the shell 11 close to the second end 112, so that the first heating element 131 forms an installation cavity with the shell 11;

[0115] A layer of smoking material and a layer of second heating element 132 are sequentially filled into the installation cavity from the first end 111, and the filling is performed N times, where N is a positive integer;

[0116] A layer of smoking material is filled from the first end 111 to cover the second heating element 132 from the side close to the first end.

[0117] In some embodiments, a hard paper tube is used as the shell 11;

[0118] In some embodiments, the first heating element 131 is arranged close to the second end 112 and leaves a certain space as the spacing section 15 between the first heating element 131 and the second end 112, that is, the first heating element 131 is suspended above the second end 112, preventing the first heating element 131 from being exposed to the shell 11, thereby avoiding the risk of the user directly contacting the first heating element 131 and being scalded when using.

Claims

1. An aerosol-generating article having opposite first and second ends (111, 112); characterised in that, The aerosol generating article comprises a cylindrical shell (11), a substrate section (12) arranged in the shell (11), and a heating element (13); The heating element (13) comprises a heating body, the heating body comprises a first heating element (131) arranged on the end face of the substrate section (12) close to the second end (112), and the edge of the first heating element (131) is sealed to the inner wall of the shell (11) to seal the first heating element (131) on one side of the substrate section (12) close to the second end (112); The shell (11) is provided with an air inlet hole (113) penetrating the side wall from the first heating element (131) to the first end (111).

2. An aerosol-generating article according to claim 1, wherein, The heating element (13) further comprises at least one second heating element (132) arranged separately from the first heating element (131), and the second heating element (132) is arranged transversely in the substrate section (12); When the second heating element (132) is a plurality of second heating elements, the second heating elements (132) are arranged axially apart from each other along the shell (11).

3. An aerosol-generating article according to claim 2, wherein, The heating element (13) further comprises a heat conductor (14), one end of the heat conductor (14) is connected to the first heating element (131), and the other end of the heat conductor (14) extends into the substrate section (12).

4. An aerosol-generating article according to claim 3, wherein, The first heating element (131) and the heat conductor (14) are integrally formed, and the second heating element (132) is detachably connected to the heat conductor (14).

5. An aerosol-generating article according to claim 3, wherein, The heat conductor (14) is detachably connected to the second heating element (132), and a positioning structure is arranged between the heat conductor (14) and the second heating element (132) to fix the second heating element (132) at a specific position of the heat conductor (14).

6. An aerosol-generating article according to claim 3, wherein, The heat conductor (14) is a strip-shaped heat conductor.

7. An aerosol-generating article according to claim 3, wherein, The heat conductor (14) is made of one or more of graphite powder, graphene, boron nitride, aluminum oxide, and carbon powder, Or, the thermal conductivity coefficient of the heat conductor (14) is 1-500 W / m.k, Or, the heat conductor (14) and the heating body are both made of magnetic induction heating material.

8. An aerosol-generating article according to claim 3, wherein, When the aerosol generating article is used with a heating device, the heating temperature of the heating body is higher than the temperature of the heat conductor (14), and the temperature difference between the heating body and the heat conductor (14) is 20-80℃.

9. An aerosol-generating article according to claim 2, wherein, There is a gap (114) between the second heating element (132) and the inner wall of the shell (11); and / or, the second heating element (132) is provided with a through hole (1321) arranged axially along the shell (11).

10. An aerosol-generating article according to claim 9, wherein, The substrate section (12) comprises a granular smoking material; There is a gap (114) between the second heating element (132) and the inner wall of the shell (11), and the size of the smoking material is configured to pass through the gap (114); or The second heating element (132) is provided with a through hole (1321) arranged axially along the shell (11), and the size of the smoking material is configured to pass through the through hole (1321); or The second heating element (132) is provided with a through hole (1321) arranged axially along the shell (11), and the size of the smoking material is configured to pass through the through hole (1321) and / or the gap (114).

11. An aerosol-generating article according to claim 2, wherein, The first heating element (131) and the second heating element (132) are inductive heating elements.

12. An aerosol-generating article according to any one of claims 1 to 11, wherein, The air inlet hole (113) is arranged through the side wall of the shell (11) wrapped with the substrate section (12).

13. An aerosol-generating article according to any one of claims 1 to 11, wherein, The air inlet hole (113) includes one or more, and the opening size of a single air inlet hole (113) is 0.05-3mm; and / or, The air inlet hole (113) is 1-20mm away from the end face of the substrate section (12) close to the second end (112).

14. An aerosol-generating article according to any one of claims 1 to 11, wherein, The aerosol generating article is provided with a spacing section (15) on the side of the first heating element (131) close to the second end (112).

15. An aerosol-generating article according to claim 14, wherein, The spacing section (15) includes a cavity portion (151), and the shell (11) forms the cavity portion (151) between the first heating element (131) and the second end (112); and / or, the spacing section (15) includes a heat insulation member (152), which is connected with the shell (11) and seals the second end (112) or the side of the first heating element (131) close to the second end (112); or, the spacing section (15) includes a heat insulation layer (153) arranged on the outer surface of the first heating element (131).

16. An aerosol-generating article according to any one of claims 1 to 11, wherein, Further comprising a heat blocking member (19) arranged between the heating member (13) and the inner wall of the shell (11), which separates the heating member (13) and the shell (11).

17. A method of manufacturing an aerosol-generating article for manufacturing an aerosol- generating article according to any one of claims 1 to 16, characterised in that, The preparation method comprises the following steps: Providing a shell (11); Providing an air inlet hole (113) on the shell (11); Providing the heating member (13) in the shell (11), wherein the heating member (13) comprises a first heating element (131), the first heating element (131) is arranged transversely close to the second end (112), and the edge of the first heating element (131) is sealed with the inner wall of the shell (11) to form a mounting cavity; Loading smoking material into the mounting cavity from the first end (111).

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