Heating assembly, preparation method for heating assembly, and aerosol generation device

Abstract

The present application provides a heating assembly (10), a preparation method for the heating assembly (10), and an aerosol generation device (100). The heating assembly (10) comprises: a heating substrate (1); and a heating layer (2), which is arranged on the heating substrate (1), the heating substrate (1) being wound to form a cylinder. The heating layer (2) comprises a first electrode (21), a second electrode (22) and a plurality of heating units (23), the plurality of heating units (23) being distributed at axial intervals in the winding direction of the heating substrate (1), each heating unit (23) extending in the winding direction of the heating substrate (1), and each heating unit (23) being electrically connected to both the first electrode (21) and the second electrode (22). In the heating assembly (10) provided in the present application, the provision of a plurality of heating units (23) extending in the winding direction of the heating substrate (1) enables an increase in the area of a heating region; moreover, the arrangement of the heating units (23) can be configured on the basis of the temperature distribution required for heating a aerosol-generating product, such that the temperature distribution of the heating assembly (10) is more uniform and controllable.

Description

Heating element, preparation method of heating element and aerosol generation device

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411456539.8, filed on October 17, 2024, entitled “Heating Component, Method for Preparing Heating Component and Aerosol Generating Apparatus”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of aerosol generation technology, and in particular to the heating components of an aerosol generation device. Background Technology

[0004] The heated but non-combustible aerosol generating device includes a heating element that can be inserted into the interior of the aerosol generating article to heat the aerosol generating article. The heating element can have a heating layer on a support to heat the aerosol generating article.

[0005] Traditional heating elements use materials with high resistance temperature coefficients for their conductive coatings. Aerosol generating devices utilize the resistance temperature characteristics of these materials for temperature control. However, in traditional heating elements, there is a significant temperature difference between areas without and with conductive coatings. Areas farther from the conductive pins are hotter, while areas closer to the conductive pins are colder, resulting in uneven temperature distribution between the two conductive pins. Furthermore, heating elements are typically fixed to a support, causing the area closer to the support to dissipate heat faster than the area farther away, leading to a higher casing temperature and making it difficult to control the temperature distribution of the heating element.

[0006] Application content

[0007] To address the problems of small heating area, slow temperature rise rate, and uncontrollable temperature distribution of previous heating components.

[0008] This application provides a heating component, including: a heating substrate; a heating layer, wherein the heating layer is disposed on the heating substrate, the heating substrate is wound to form a column, the heating layer includes a first electrode, a second electrode and a plurality of heating units, the plurality of heating units are spaced apart along the axial direction of the winding direction of the heating substrate, each heating unit extends along the winding direction of the heating substrate, and each heating unit is electrically connected to the first electrode and the second electrode.

[0009] This application provides a heating component, wherein the dimension of the heating unit in the axial direction of the winding direction of the heating substrate is the width of the heating unit, and at least one of the heating units has a different width from the other heating units; or,

[0010] Each of the heating elements has the same dimension in the axial direction of the winding direction of the heating substrate.

[0011] This application provides a heating assembly in which the width of a plurality of heating units gradually changes in the axial direction of the winding direction of the heating substrate.

[0012] This application provides a heating assembly in which the distance between any two adjacent heating units in the axial direction of the winding direction of the heating substrate is L, wherein at least one L is not equal to any of the other Ls; or...

[0013] In the axial direction of the winding direction of the heating substrate, the spacing between any two adjacent heating units is equal.

[0014] This application provides a heating component in which the density of a plurality of heating units gradually changes along the axial direction of the winding direction of the heating substrate.

[0015] This application provides a heating component, wherein one end of each heating unit is electrically connected to the first electrode and the other end is electrically connected to the second electrode.

[0016] This application provides a heating component, wherein at least one of the first electrode and the second electrode extends along the axial direction of the winding direction of the heating substrate.

[0017] This application provides a heating component, wherein when the heating substrate is wound to form a columnar structure, the heating substrate includes at least one wound layer.

[0018] This application provides a heating component, wherein the heating layer is wound with 0.8-3 turns.

[0019] This application provides a heating component in which, when the heating substrate is wound to form a columnar structure, the innermost or outermost winding layer does not have the heating layer.

[0020] This application provides a heating component in which, when at least one of the first electrode and the second electrode is located on a non-outermost winding layer, or when at least one of the first electrode and the second electrode is located on the inner surface of the outermost winding layer, a first connection hole is provided on the corresponding first electrode or the second electrode, and a second connection hole is provided on the heating substrate at a position corresponding to the first connection hole.

[0021] The first connection hole and the second connection hole are used for electrical connection of the corresponding conductive pins.

[0022] This application provides a heating component, wherein at least one of the first electrode and the second electrode includes a first segment and a second segment connected to the first segment, the first segment is used to electrically connect the heating unit, the second segment extends along the winding direction of the heating substrate, and the first connection hole is provided on the second segment.

[0023] This application provides a heating component, wherein the first connecting hole is a round hole, an elliptical hole, an oblong hole, or an elongated hole.

[0024] This application provides a heating component in which, when at least one of the first electrode and the second electrode is located on the outer surface of the outermost winding layer, the first electrode or the second electrode is electrically connected to the corresponding conductive pin.

[0025] This application provides a heating component, wherein the heating layer further includes a first conductive unit and a second conductive unit. The first conductive unit is located between the heating unit and the first electrode to electrically connect the heating unit to the first electrode, and the second conductive unit is located between the heating unit and the second electrode to electrically connect the heating unit to the second electrode.

[0026] This application provides a heating assembly in the axial direction of the winding direction of the heating substrate, the heating substrate includes a first edge and a second edge opposite to each other, the distance between the heating unit closest to the first edge and the first edge is L1, the distance between the heating unit closest to the second edge and the second edge is L2, and L1 and L2 are not equal.

[0027] This application provides a heating component, which further includes a support member, and the heating substrate is wound around the support member to form a column.

[0028] This application provides a heating component, wherein the support includes an insertion portion and a support portion connected to the insertion portion, the heating substrate is wound around the support portion, and the insertion portion protrudes from the heating substrate.

[0029] This application provides a heating component, wherein the insertion portion is tapered.

[0030] This application provides a heating component in which the length of the heating substrate is greater than or equal to the length of the support portion in the axial direction of the winding direction of the heating substrate.

[0031] This application provides a heating component, wherein the length of the heating substrate in the axial direction of its winding direction is less than the length of the support portion.

[0032] This application provides a heating component, wherein the length of the support portion in the axial direction of the winding direction of the heating substrate is greater than or equal to 3.5 mm.

[0033] This application provides a heating component, wherein the support member is provided with a clearance portion, the clearance portion extends along the axis of the support member, and the edge of the heating substrate is disposed at the clearance portion.

[0034] This application provides a heating component, wherein the heating layer is disposed on the surface of the heating substrate.

[0035] This application provides a heating component, wherein the heating layer is disposed on the radially inward surface or the radially outward surface of the heating substrate.

[0036] This application provides a heating component, wherein the heating layer has a dimension of 6mm-15mm along the axial direction of the winding direction; and / or the heating layer has a dimension of 8mm-11mm along the axial direction of the winding direction.

[0037] This application provides a heating component, wherein the heating unit has a dimension greater than or equal to 0.20 mm along the axial direction of the winding direction.

[0038] This application provides a heating assembly in which the distance between two adjacent heating units is greater than or equal to 0.20 mm in the axial direction of the winding direction of the heating substrate.

[0039] This application provides a heating component, wherein the thickness of the heating layer is 5μm-30μm; and / or the thickness of the heating layer is 8μm-20μm; and / or the thickness of the heating layer is 10μm-18μm; and / or the thickness of the heating layer is 12μm-18μm.

[0040] This application provides a heating component, wherein the thickness of the first electrode or the second electrode is 5μm-30μm; and / or the thickness of the first electrode or the second electrode is 8μm-20μm; and / or the thickness of the first electrode or the second electrode is 10μm-18μm; and / or the thickness of the first electrode or the second electrode is 12μm-18μm.

[0041] This application provides a heating component, wherein the thickness of the heating substrate is 0.08mm-0.35mm; and / or the thickness of the heating substrate is 0.10mm-0.20mm.

[0042] This application provides a heating element with a diameter greater than or equal to 2 mm.

[0043] This application provides a heating component, wherein the heating layer contains tungsten, silver or palladium.

[0044] This application provides a heating component, wherein the first electrode and the second electrode include silver paste electrodes.

[0045] This application provides a method for preparing a heating component, comprising:

[0046] Obtain the cast film as the heating substrate;

[0047] A heating layer is printed on the surface of the heating substrate;

[0048] The cast sheet is wound to form a green blank;

[0049] The green blank is sintered to obtain a heating element.

[0050] This application provides a method for preparing a heating component, wherein the step of printing a heating layer on the surface of the heating substrate specifically includes:

[0051] Multiple heating elements are printed on the surface of the heating substrate, and the multiple heating elements are arranged at intervals.

[0052] A first electrode and a second electrode are printed at both ends of the plurality of heating units, respectively.

[0053] This application provides a method for preparing a heating component, wherein a support is provided before the cast sheet is wound to form a green blank, and the cast sheet is wound along the circumferential direction of the support; or a support is provided after the cast sheet is wound to form a green blank, and the support is inserted into the green blank.

[0054] This application provides a method for preparing a heating component, wherein the number of turns of the cast film is greater than or equal to 1.

[0055] This application provides a method for preparing a heating element, wherein the step of sintering the green blank to obtain the heating element specifically includes:

[0056] First sintering;

[0057] After cooling, a second sintering process is carried out.

[0058] This application provides a method for preparing a heating element, wherein after the second sintering, a protective medium is coated on the heating element, and a third sintering is performed to form a protective layer.

[0059] This application provides a method for preparing a heating element, wherein the cast sheet comprises one or more of silicon dioxide, alumina, zirconium oxide, aluminum nitride, silicon nitride, and silicon carbide; and / or the cast sheet comprises zirconium oxide toughened alumina ceramic.

[0060] This application provides a method for preparing a heating element, wherein the heating element comprises tungsten paste, and the temperature of the first sintering is 1500℃-1600℃.

[0061] This application provides a method for preparing a heating component, wherein the first sintering atmosphere is a reducing atmosphere.

[0062] This application provides a method for preparing a heating element, wherein the cast sheet comprises glass powder and one or more of alumina, zirconium oxide, aluminum nitride, or silicon carbide.

[0063] This application provides a method for preparing a heating element, wherein the heating element comprises silver-palladium paste, and the temperature of the first sintering is 800℃-1000℃ or 850℃-950℃.

[0064] This application provides a method for preparing a heating component. After the first sintering, the method further includes: drilling a hole at one end of the first electrode and the second electrode to form a first connecting hole, filling the first connecting hole with silver paste, and then performing a second sintering at a temperature of 800℃-1000℃.

[0065] This application provides a method for preparing a heating component. After the cast sheet is wound to form a green blank, the method further includes: performing an isostatic pressing process on the green blank.

[0066] This application provides a method for preparing a heating component. Before forming a casting film by printing a first electrode and a second electrode at both ends of a plurality of heating units, the method further includes printing a first conductive unit and a second conductive unit at both ends of the heating unit.

[0067] This application provides a method for preparing a heating component, which further includes, before printing the first electrode and the second electrode, printing a first transition layer and a second transition layer on the surfaces of the first conductive unit and the second conductive unit.

[0068] This application provides an aerosol generating device, including a battery assembly and the aforementioned heating assembly, wherein the battery assembly is used to provide electrical energy to the heating assembly.

[0069] The heating component provided in this application has multiple heating units extending along the winding direction of the heating substrate, which increases the area of ​​the heating region. Furthermore, the arrangement of the heating units can be set according to the required temperature distribution for heating the aerosol to generate the product, making the temperature distribution of the heating component more uniform and controllable. Attached Figure Description

[0070] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0071] Figure 1 is a schematic diagram of a heating component according to an embodiment of this application;

[0072] Figure 2 is a schematic diagram of a heating component according to an embodiment of this application;

[0073] Figure 3 is a schematic diagram of a heating component according to an embodiment of this application;

[0074] Figure 4 is a schematic diagram of a support member according to an embodiment of this application;

[0075] Figure 5 is a schematic diagram of a heating component according to an embodiment of this application;

[0076] Figure 6 is a schematic diagram of a heating component according to an embodiment of this application;

[0077] Figure 7 is a schematic diagram of a method for preparing a heating component according to an embodiment of this application;

[0078] Figure 8 is a schematic diagram of an aerosol generating apparatus according to an embodiment of this application.

[0079] In the picture:

[0080] 10. Heating components;

[0081] 1. Heating substrate; 11. Second connecting hole; 12. First edge; 13. Second edge;

[0082] 2. Heating layer; 21. First electrode; 22. Second electrode; 23. Heating unit; 24. First connecting hole; 25. First segment; 26. Second segment; 27. First conductive unit; 28. Second conductive unit;

[0083] 3. Support component; 31. Insertion part; 32. Support part; 33. Clearance part;

[0084] 20. Battery components;

[0085] 100. Aerosol generating device. Embodiments of the present invention

[0086] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0087] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying the quantity or order of the indicated technical features relative to their importance. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0088] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0089] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be intervening elements. When an element is referred to as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0090] It should be noted that the embodiments of this application provide a heating component and an aerosol generating device including the heating component. The aerosol generating device can be used in conjunction with an aerosol generating product to generate aerosols.

[0091] Aerosol generating articles may include a mouthpiece, a connecting section, and a tobacco segment capable of generating aerosols. The connecting section, located between the mouthpiece and the tobacco segment, guides the aerosol to the mouthpiece. The mouthpiece is for a user to hold in their mouth, allowing the user to inhale the aerosol by sucking on the mouthpiece. The tobacco segment in the aerosol generating article may contain an aerosol generating matrix.

[0092] As used herein, the term "aerosol-generating matrix" refers to a matrix capable of releasing volatile substances to form inhalable aerosols. The aerosol-generating matrix may include tobacco-containing materials containing volatile tobacco flavor compounds that are released from the substrate upon heating. Specifically, the aerosol-generating matrix may be a tobacco-containing aerosol-generating matrix or an aerosol-generating matrix containing solid tobacco. Alternatively, the aerosol-generating matrix may include non-tobacco materials. The aerosol-generating matrix may also include aerosol-forming agents. Examples of suitable aerosol-forming agents are glycerol and propylene glycol.

[0093] If desired, the aerosol generating matrix may contain additional tobacco or non-tobacco volatile flavor compounds released when the aerosol generating matrix is ​​heated. The aerosol generating matrix may also contain microcapsules, such as those containing additional tobacco or non-tobacco volatile flavor compounds, and these microcapsules may melt during heating of the solid aerosol generating matrix.

[0094] The aerosol-generating article can be generally a rod-shaped structure extending longitudinally. The mouthpiece can be positioned adjacent to the proximal end of the aerosol-generating article. The tobacco segment can be positioned adjacent to the distal end of the aerosol-generating article.

[0095] The heating element releases heat to the aerosol-generating product, causing the aerosol-generating matrix to produce volatile substances. These volatile substances combine with air flowing into the aerosol-generating matrix to form an aerosol. The air flowing into the aerosol-generating matrix and the aerosol generated by the matrix can exit from the proximal end of the matrix and be inhaled into the user's mouth.

[0096] This application provides a heating component 10, as shown in FIG1, comprising: a heating substrate 1 and a heating layer 2. The heating layer 2 is disposed on the heating substrate 1, which is wound to form a cylinder. The heating layer 2 includes a first electrode 21, a second electrode 22, and a plurality of heating units 23. The plurality of heating units 23 are spaced apart along the axial direction of the winding direction of the heating substrate 1, and each heating unit 23 extends along the winding direction of the heating substrate 1. Each heating unit 23 is electrically connected to both the first electrode 21 and the second electrode 22.

[0097] The heating component 10 provided in this application has a plurality of heating units 23 extending along the winding direction of the heating substrate 1, which increases the area of ​​the heating region. Furthermore, the arrangement of the heating units 23 can be set according to the required temperature distribution for heating the aerosol to generate the product, making the temperature distribution of the heating component 10 more uniform and controllable.

[0098] In one embodiment of this application, compared with the first electrode 21 and the second electrode 22, the heating unit 23 is made of a material with higher resistivity for heating the aerosol to generate the article, while the first electrode 21 and the second electrode 22 are made of a material with lower resistivity for guiding current. In one embodiment of this application, the resistance of the first electrode 21 and the second electrode 22 is much smaller than the resistance of the heating unit 23, for example, the resistance of the heating unit 23 is three times or more than ten times the resistance of the first electrode 21 or the second electrode 22. In one embodiment of this application, the width of the first electrode 21 or the second electrode 22 is greater than the width of the heating unit 23. The width of the heating unit 23 can be in the axial direction of the winding direction of the heating substrate 1. The width of the first electrode 21 or the second electrode 22 can be in the winding direction of the heating substrate 1.

[0099] In one embodiment of this application, the dimension of the heating unit 23 along the axial direction of the winding direction of the heating substrate 1 is the width of the heating unit 23, and at least one heating unit 23 has a different width from the other heating units 23. In this way, the resistance distribution on the heating substrate 1 can be adjusted according to requirements, thereby enabling the temperature field distribution of the heating substrate 1 to meet the different heating requirements of the aerosol generation matrix.

[0100] For example, in one embodiment of this application, along the axial direction of the winding direction of the heating substrate 1, the two ends of the heating substrate 1 are a first end and a second end, respectively. The heating unit 23 located at the first end of the heating substrate 1 has a larger width, while the heating unit 23 located at the second end of the heating substrate 1 has a smaller width. This results in the heating unit 23 located at the first end of the heating substrate 1 having a lower resistance and generating more heat, while the heating unit 23 located at the second end of the heating substrate 1 has a higher resistance and generates less heat. Thus, the temperature is higher near the first end of the heating substrate 1, and lower near the second end of the heating substrate 1, thereby satisfying the requirement of different temperature distributions at both ends of the heating substrate 1.

[0101] For example, in one embodiment of this application, the heating unit 23 located in the middle of the heating substrate 1 has a larger width, while the heating units located on both sides of the heating substrate 23 have a smaller width. This results in the heating unit 23 located in the middle of the heating substrate 1 having a smaller resistance and generating more heat, while the heating units located on both sides of the heating substrate 23 have a larger resistance and generating less heat.

[0102] In one embodiment of this application, each heating unit 23 has the same size in the axial direction of the winding direction of the heating substrate 1, so that each heating unit 23 on the heating substrate 1 generates approximately the same amount of heat.

[0103] In one embodiment of this application, the width of the plurality of heating units 23 gradually changes along the axial direction of the winding direction of the heating substrate 1. It should be noted that the width of the heating unit 23 is its width dimension along the axial direction of the winding direction of the heating substrate 1. For example, in one embodiment of this application, the width of the plurality of heating units 23 gradually decreases or gradually increases along the axial direction of the winding direction of the heating substrate 1. As another example, in one embodiment of this application, the plurality of heating units 23 are sequentially divided into different groups along the axial direction of the winding direction of the heating substrate 1, with each group containing a plurality of heating units 23. The number of heating units 23 in any two groups can be the same or different; the width of the heating units 23 within the same group is the same, while the width of the heating units 23 in different groups is different. Along the axial direction of the winding direction of the heating substrate 1, the width of the heating unit 23 gradually decreases or gradually increases regionally according to the group division.

[0104] In one embodiment of this application, the dimension of the heating unit 23 along the axial direction of the winding direction is greater than or equal to 0.2 mm, that is, the width of the heating unit 23 along the axial direction of the winding direction of the heating substrate 1 is greater than or equal to 0.2 mm. In one embodiment of this application, the width of the heating unit 23 is 0.2 mm to 0.7 mm. In one embodiment of this application, the width of the heating unit 23 is 0.2 mm to 0.35 mm. In one embodiment of this application, the dimension of the heating unit 23 along the axial direction of the winding direction can be 0.20 mm, 0.23 mm, 0.25 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.30 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.50 mm, 0.55 mm, 0.60 mm, or 0.70 mm.

[0105] In one embodiment of this application, there are fourteen heating units 23. The width of the first to fourth heating units 23 is 0.31 mm, the width of the fifth to seventh heating units 23 is 0.30 mm, the width of the eighth to tenth heating units 23 is 0.29 mm, the width of the eleventh to twelfth heating units 23 is 0.28 mm, and the width of the thirteenth to fourteenth heating units 23 is 0.27 mm. The distance between two adjacent heating units 23 is 0.27 mm, the distance between the eleventh and twelfth heating units 23 is 0.35 mm, the distance between the twelfth and thirteenth heating units 23 is 0.4 mm, and the distance between the thirteenth and fourteenth heating units 23 is 0.44 mm. The dimension of the heating layer 2 along the axial direction of the winding direction is 8 mm.

[0106] In one embodiment of this application, the distance between any two adjacent heating units 23 in the axial direction of the winding direction of the heating substrate 1 is L, wherein at least one L is not equal to any other L. In one embodiment of this application, the distance between two adjacent heating units 23 at one end of the heating substrate 1 is smaller, and the distance between two adjacent heating units 23 at the other end of the heating substrate 1 is larger, resulting in a dense distribution of heating units 23 at one end of the heating assembly 10 and a sparse distribution of heating units at the other end of the heating assembly 10.

[0107] In one embodiment of this application, the distance between two adjacent heating units 23 in the middle of the heating substrate 1 is small, while the distance between two adjacent heating units 23 at both ends of the heating substrate 1 is large. This results in a concentrated distribution of heating units 23 in the middle of the heating assembly 10 and a sparse distribution of heating units 23 at both ends of the heating assembly 10. Therefore, the temperature field distribution of the heating assembly 10 can be adjusted by changing the density of the multiple heating units 23.

[0108] In one embodiment of this application, the spacing between any two adjacent heating units 23 is equal along the axial direction of the winding direction of the heating substrate 1. That is, the multiple heating units 23 are evenly distributed. In another embodiment of this application, the density of the multiple heating units 23 gradually changes along the axial direction of the winding direction of the heating substrate 1. It should be noted that the "density of the multiple heating units 23" here can be understood as the distribution of the multiple heating units 23. When the multiple heating units 23 are relatively concentrated (the spacing between any two adjacent heating units 23 is small), the distribution of the multiple heating units 23 is dense; when the multiple heating units 23 are relatively dispersed (the spacing between any two adjacent heating units 23 is large), the distribution of the multiple heating units 23 is sparse. Here, "relatively concentrated" and "relatively dispersed" can be understood as relative concepts. In one embodiment of this application, the density of the multiple heating units 23 gradually decreases along the axial direction of the winding direction of the heating substrate 1.

[0109] In one embodiment of this application, the spacing between any two adjacent heating units 23 is equal in the axial direction of the winding direction of the heating substrate 1, and the multiple heating units 23 are divided into different groups. The heating units 23 in the same group have the same width, and the width of the heating units 23 in different groups gradually decreases.

[0110] In one embodiment of this application, the distance between two adjacent heating units 23 is greater than or equal to 0.20 mm in the axial direction of the winding direction of the heating substrate 1. In one embodiment of this application, the distance between two adjacent heating units 23 is 0.2 mm to 0.7 mm in the axial direction of the winding direction of the heating substrate 1. In one embodiment of this application, the distance between two adjacent heating units 23 is 0.2 mm to 0.35 mm in the axial direction of the winding direction of the heating substrate 1. In one embodiment of this application, the distance between two adjacent heating units 23 can be 0.20 mm, 0.23 mm, 0.25 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.30 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.50 mm, 0.55 mm, 0.60 mm, or 0.70 mm in the axial direction of the winding direction of the heating substrate 1.

[0111] In one embodiment of this application, one end of each heating unit 23 is electrically connected to the first electrode 21, and the other end is electrically connected to the second electrode 22. In another embodiment of this application, when the heating substrate 1 is in the unfolded state, the first electrode 21 and the second electrode 22 are located at both ends of the heating unit 23, and multiple heating units 23 are connected in parallel. In some other embodiments of this application, when the heating substrate 1 is in the unfolded state, the first electrode 21 is connected to the middle of the heating unit 23, and the second electrode 22 is connected to one end of the heating unit 23. In some other embodiments of this application, when the heating substrate 1 is in the unfolded state, both the first electrode 21 and the second electrode 22 are located in the middle of the heating unit 23.

[0112] In one embodiment of this application, at least one of the first electrode 21 and the second electrode 22 extends along the axial direction of the winding direction of the heating substrate 1. In one embodiment of this application, the heating unit 23 extends along the winding direction. In one embodiment of this application, when the heating substrate 1 is in the unfolded state, the extending directions of the first electrode 21 and the second electrode 22 are substantially perpendicular to the extending direction of the heating unit 23.

[0113] In one embodiment of this application, when the heating substrate 1 is wound to form a columnar structure, the heating substrate 1 includes at least one wound layer, such that the heating substrate 1 can form a column after being wound. The heating substrate 1 has a good supporting function, which facilitates the placement of the heating layer 2 on the surface of the heating substrate 1. During winding, the heating layer 2 can be wound to the radially inner surface of the wound layer, or the heating layer can be wound to the radially outer surface of the wound layer.

[0114] It should be noted that the term "winding layer" here can be understood as a columnar structure formed when the heating substrate 1 is wound; when the heating substrate 1 is wound multiple times, a corresponding number of winding layers can be formed. In one embodiment of this application, the number of winding layers of the heating substrate 1 can be 1, 1.5, 1.8, 2, 2.2, 3, etc.

[0115] In one embodiment of this application, the heating layer 2 is wound with 0.8-3 turns. In another embodiment, the heating layer 2 is wound with 0.8 turns. In this case, after the heating substrate 1 is wound, the two ends of the heating unit 23 are still spaced a certain distance apart. The two ends of the heating unit 23 are respectively provided with a first electrode 21 and a second electrode 22, facilitating the entry of external current into the heating unit 23. Furthermore, during the heating process, heat radiates between the two ends of the heating unit 23, ensuring that the heat in the heating component 10 is still evenly distributed in the circumferential direction. In another embodiment, the heating layer 2 is wound with 1, 2, or 3 turns, ensuring that the heating layer 2 is evenly distributed in both the axial and circumferential directions, resulting in more uniform heating of the heating component 10.

[0116] In one embodiment of this application, when the heating substrate 1 is wound to form a columnar structure, the innermost or outermost winding layer does not have a heating layer 2. In another embodiment of this application, when the heating substrate 1 is wound to form a columnar structure, the innermost winding layer does not have a heating layer 2, so that the innermost winding layer of the heating substrate 1 provides support to the outermost winding layers of the heating substrate 1, and the innermost winding layer of the heating substrate 1 forms a cavity for accommodating the aerosol-generated product. In another embodiment of this application, when the heating substrate 1 is wound to form a columnar structure, the outermost winding layer does not have a heating layer 2. When the heating layer 2 is located on the radially outward surface of the heating substrate 1, the outermost ring of the heating substrate 1 without a heating layer 2 can provide insulation and protection for the heating layer 2 on the inner winding layer of the heating substrate 1.

[0117] In one embodiment of this application, when at least one of the first electrode 21 and the second electrode 22 is located on a non-outermost winding layer, or when at least one of the first electrode 21 and the second electrode 22 is located on the inner surface of the outermost winding layer, a first connection hole 24 is provided on the corresponding first electrode 21 or the second electrode 22, and a second connection hole 11 is provided on the heating substrate 1 at a position corresponding to the first connection hole 24. The first connection hole 24 and the second connection hole 11 are used to electrically connect the corresponding conductive pins.

[0118] In one embodiment of this application, a connector is provided in the first connection hole 24. The connector includes silver paste, solder, etc., to facilitate the connection of the first electrode 21 or the second electrode 22 with the conductive pin. In another embodiment of this application, both the first connection hole 24 and the second connection hole 11 are provided with connectors. The connectors include silver paste, solder, etc., to facilitate the connection of the first electrode 21 or the second electrode 22 with the conductive pin.

[0119] In one embodiment of this application, at least one of the first electrode 21 and the second electrode 22 includes a first segment 25 and a second segment 26 connected to the first segment 25. The first segment 25 is used for electrical connection to the heating unit 23, and the second segment 26 extends along the winding direction of the heating substrate 1, with a first connection hole 24 disposed on the second segment 26. In one embodiment of this application, the first segment 25 extends along the axial direction of the winding direction, and the second segment 26 extends along the winding direction, such that after the heating substrate 1 is wound, the first electrode 21 or the second electrode 22 retains a certain length in the winding direction, making it easy for the second connection hole 11 of the heating substrate 1 to connect to the second segment 26.

[0120] In one embodiment of this application, the first connecting hole 24 is disposed in the second segment 26. In another embodiment of this application, the cross-sectional area of ​​the first connecting hole 24 is larger than the cross-sectional area of ​​the second connecting hole 11, such that after the heating substrate 1 is wound, the projection of the second connecting hole 11 is at least partially located within the first connecting hole 24, which facilitates connecting the first electrode 21 or the second electrode 22 to the conductive pin.

[0121] In one embodiment of this application, the first connecting hole 24 is a round hole, an elliptical hole, an oblong hole, or a long strip hole. In one embodiment of this application, the second connecting hole 11 is a round hole.

[0122] In one embodiment of this application, when at least one of the first electrode 21 and the second electrode 22 is located on the outer surface of the outermost winding layer (i.e., the radially outer surface of the winding layer), the first electrode 21 or the second electrode 22 is electrically connected to the corresponding conductive pin.

[0123] In one embodiment of this application, as shown in FIG1, when the heating layer 2 is located on the radially inner or outer surface of the heating substrate 1 (that is, the radially inner or outer surface of the heating substrate 1 in the winding direction), and the heating substrate 1 is wound 2 turns, the first electrode 21 located on the inner winding of the heating substrate 1 includes a first segment 25 and a second segment 26 connected to the first segment 25. The first segment 25 is used to electrically connect the heating unit 23. The second segment 26 extends along the winding direction of the heating substrate 1. The second electrode 22 is located on the inner surface of the outermost winding layer. A first connecting hole 24 is provided at one end of the second segment 26 and the second electrode 22. A second connecting hole 11 is provided at the position of the heating substrate 1 corresponding to the first connecting hole.

[0124] In one embodiment of this application, as shown in FIG2, the heating layer 2 further includes a first conductive unit 27 and a second conductive unit 28. The first conductive unit 27 is located between the heating unit 23 and the first electrode 21, so that the heating unit 23 is electrically connected to the first electrode 21. The second conductive unit 28 is located between the heating unit 23 and the second electrode 22, so that the heating unit 23 is electrically connected to the second electrode 22. The contact area between the first conductive unit 27 and the first electrode 21 is relatively large, thereby reducing the contact resistance between the first electrode 21 and the heating unit 23; the contact area between the second conductive unit 28 and the second electrode 22 is relatively large, thereby reducing the contact resistance between the second electrode 22 and the heating unit 23.

[0125] In one embodiment of this application, the first conductive unit 27 and the second conductive unit 28 are made of the same material as the heating unit 23, but the widths of the first conductive unit 27 and the second conductive unit 28 are larger, thus resulting in lower resistances. In another embodiment of this application, the first conductive unit 27 and the second conductive unit 28 are disposed at both ends of the heating unit 23, thereby connecting multiple heating units in parallel.

[0126] In one embodiment of this application, along the axial direction of the winding direction of the heating substrate 1, the heating substrate 1 includes a first edge 12 and a second edge 13 opposite to each other. The distance L1 between the heating unit 23 closest to the first edge 12 and the first edge 12, and the distance L2 between the heating unit 23 closest to the second edge 13 and the second edge 13, are not equal. In one embodiment of this application, L1 is less than L2, such that the heating unit 23 is located on the side of the heating substrate 1 closer to the first edge 12, and the heating area on the heating assembly 10 is concentrated on the side closer to the first edge 12.

[0127] In one embodiment of this application, as shown in Figures 3-4, the heating component 10 may further include a support member 3, and the heating substrate 1 is wound around the support member 3 to form a column. The support member 3 provides support for the heating substrate 1 and increases the structural strength of the heating component 10.

[0128] In some other embodiments of this application, the heating component 10 may not have a support member 3, and the heating substrate 1 may serve to support the heating layer 2.

[0129] In one embodiment of this application, the support member 3 may include an insertion part 31 and a support part 32 connected to the insertion part 31, the heating base 1 is wound around the support part 32, and the insertion part 31 protrudes from the heating base 1.

[0130] In one embodiment of this application, the heating substrate 1 is wound to form a hollow tube, the support portion 3 is inserted into the hollow tube structure, and the insertion portion 31 is used to guide the aerosol generating article so that the heating component 10 is inserted into the interior of the aerosol generating article.

[0131] In one embodiment of this application, the insertion portion 31 is tapered, facilitating the insertion of the heating component 10 into the interior of the aerosol-generating article. In another embodiment of this application, the support member 3 is umbrella-shaped.

[0132] In one embodiment of this application, the length of the heating substrate 1 in the axial direction of its winding direction is greater than or equal to the length of the support portion 32. The heating substrate 1 has sufficient support strength for the heating layer 2. The support 3 is mainly provided to the heating assembly 10 for insertion into the solvent-generated product via an insertion portion 31. The insertion portion 31 is connected to the heating substrate 1 through the support portion 32.

[0133] In one embodiment of this application, as shown in Figures 5-6, the support member 3 may also be provided with a clearance portion 33, which extends along the axis of the support member 3. The starting edge of the winding of the heating substrate 1 may be located at the clearance portion 33. In one embodiment of this application, the starting point of the winding of the heating substrate 1 is located at the clearance portion 33, and the clearance portion 33 serves to limit and accommodate the starting part of the heating substrate 1.

[0134] In one embodiment of the application, the heating substrate 1 is ceramic, which is formed by sintering a cast sheet. The cast sheet includes ceramic powder, solvent, dispersant, plasticizer and functional additives, etc.

[0135] It should be noted that there is a certain height difference between the termination point of the winding of the heating substrate 1 and the inner winding layer of the heating substrate 1, resulting in an uneven outer surface of the wound heating substrate 1. Based on this, in one embodiment of this application, an isostatic pressing process can be used to form a smooth surface on the outer surface of the wound heating substrate 1.

[0136] In one embodiment of this application, if the heating substrate 1 is wound to form a hollow tube, the heating substrate 1 is wound around the winding fixture, and then an isostatic pressing process is performed to make the outer surface of the wound heating substrate 1 flat. The winding fixture is then removed, and then the support member 3 is installed.

[0137] In one embodiment of this application, the heating layer 2 is disposed on the surface of the heating substrate 1. In other embodiments of this application, the heating layer 2 is disposed in an internal interlayer of the heating substrate 1.

[0138] In one embodiment of this application, the heating layer 2 is disposed on the radially inward surface or the radially outward surface of the heating substrate 1.

[0139] In one embodiment of this application, the dimension of the heating layer 2 along the axial direction of the winding direction is 6mm-15mm. In one embodiment of this application, the dimension of the heating layer 2 along the axial direction of the winding direction is 8mm-11mm. In one embodiment of this application, the dimension of the heating layer 2 along the axial direction of the winding direction is 6mm, 7mm, 7.5mm, 8mm, 8.8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm.

[0140] In one embodiment of this application, the dimension of the heating layer 2 along the axial direction of the winding direction is less than or equal to the length of the tobacco segment of the aerosol-generating article, and the heating area corresponding to the heating layer 2 is less than or equal to the length of the tobacco segment. In another embodiment of this application, the dimension of the heating layer 2 along the axial direction of the winding direction is less than or equal to the length of the portion of the aerosol-generating article excluding the filter tip, and the heating area corresponding to the heating layer 2 is less than or equal to the portion of the aerosol-generating article excluding the filter tip.

[0141] In one embodiment of this application, the dimension of the heating unit 23 along the winding direction is an integer multiple of the circumference of the support portion 32. In another embodiment of this application, the dimension of the heating unit 23 along the winding direction is 1, 2, 3, 4, or the like of the circumference of the support portion 32.

[0142] In one embodiment of this application, the thickness of the heating layer 2 is 5μm-30μm. In another embodiment of this application, the thickness of the heating layer 2 is 8μm-18μm. In yet another embodiment of this application, the thickness of the heating layer 2 is 5μm, 6μm, 7μm, 8μm, 10μm, 12μm, 15μm, 18μm, 20μm, 25μm, 27μm, 28μm, or 30μm.

[0143] In one embodiment of this application, the thickness of the heating unit 23 is 5μm-30μm. In another embodiment, the thickness of the heating unit 23 is 8μm-20μm. In another embodiment, the thickness of the heating unit 23 is 10μm-18μm. In another embodiment, the thickness of the heating unit 23 is 12μm-18μm. In yet another embodiment, the thickness of the heating unit 23 is 5μm, 6μm, 7μm, 8μm, 10μm, 12μm, 15μm, 18μm, 20μm, 25μm, 27μm, 28μm, or 30μm.

[0144] In one embodiment of this application, the thickness of the first conductive unit 27 or the second conductive unit 28 is 5μm-30μm. In one embodiment of this application, the thickness of the first conductive unit 27 or the second conductive unit 28 is 8μm-20μm. In one embodiment of this application, the thickness of the first conductive unit 27 or the second conductive unit 28 is 10μm-18μm. In one embodiment of this application, the thickness of the first conductive unit 27 or the second conductive unit 28 is 12μm-18μm. In one embodiment of this application, the thickness of the first conductive unit 27 or the second conductive unit 28 is 5μm, 6μm, 7μm, 8μm, 10μm, 12μm, 15μm, 18μm, 20μm, 25μm, 27μm, 28μm, or 30μm.

[0145] In one embodiment of this application, the first conductive unit 27, the second conductive unit 28, and the heating unit 23 have the same thickness.

[0146] In one embodiment of this application, the thickness of the first electrode 21 or the second electrode 22 is 5 μm-30 μm. In one embodiment of this application, the thickness of the first electrode 21 or the second electrode 22 is 8 μm-20 μm. In one embodiment of this application, the thickness of the first electrode 21 or the second electrode 22 is 10 μm-18 μm. In one embodiment of this application, the thickness of the first electrode 21 or the second electrode 22 is 12 μm-18 μm. In one embodiment of this application, the thickness of the first electrode 21 or the second electrode 22 is 5 μm, 6 μm, 7 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 25 μm, 27 μm, 28 μm, or 30 μm.

[0147] In one embodiment of this application, the thickness of the heating substrate 1 is 0.08mm-0.35mm; in another embodiment, the thickness of the heating substrate 1 is 0.10mm-0.20mm. In yet another embodiment, the thickness of the heating substrate 1 is 0.08mm, 0.10mm, 0.12mm, 0.15mm, 0.18mm, 0.20mm, 0.25mm, 0.28mm, 0.30mm, 0.33mm, or 0.35mm.

[0148] In one embodiment of this application, the diameter of the heating element 10 is greater than or equal to 2 mm. In another embodiment, the diameter of the heating element 10 is related to the diameter of the aerosol-generating article; when the heating element 10 is used for central heating, its diameter is smaller than the diameter of the aerosol-generating article; when the heating element 10 is used for circumferential heating, its diameter is larger than the diameter of the aerosol-generating article. In one embodiment of this application, the diameter of the heating element 10 is 2 mm, 2.13 mm, 2.15 mm, 2.20 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 6 mm, 7 mm, 8 mm, or 8.5 mm.

[0149] Another embodiment of this application provides a method for preparing a heating component, as shown in FIG7, including:

[0150] Obtain the cast film as the heating substrate;

[0151] A heating layer is printed on the surface of the heating substrate;

[0152] The cast sheet is wound to form a green blank; the green blank is sintered to obtain a heating element.

[0153] In one embodiment of this application, the step of printing a heating layer on the surface of the heating substrate specifically includes:

[0154] Multiple heating elements are printed on the surface of the heating substrate, and the multiple heating elements are arranged at intervals;

[0155] First and second electrodes are printed at both ends of multiple heating units, respectively.

[0156] In one embodiment of this application, a support is provided before the cast sheet is wound to form a green blank, and the cast sheet is wound along the circumference of the support. In another embodiment of this application, when the cast sheet is wound along the circumference of the support, the support can be machined to form a clearance portion, so that the starting end of the cast sheet can be accommodated at the clearance portion to begin winding. This avoids interference between the second turn of the cast sheet and the starting end of the cast sheet during the winding process, and avoids the problem that cracking is likely to occur at the intersection of the second turn of the cast sheet and the starting end of the cast sheet after sintering.

[0157] In one embodiment of this application, after the cast sheet is wound to form a green blank, a support member is provided and inserted into the green blank. In another embodiment of this application, the cast sheet is wound along a winding fixture and detached from the winding fixture after being wound to form a green blank. In yet another embodiment of this application, after the cast sheet is wound to form a green blank, a support member is provided and inserted into the green blank. The support member includes a support portion and an insertion portion. The support portion is inserted into the green blank, and the insertion portion is exposed outside the green blank, serving to guide the heating element into the aerosol-generated article. The length of the support portion along the axial direction is less than the length of the green blank along the axial direction. In this case, the green blank has a certain structural strength after sintering, and the support member provides the insertion portion for the heating element to be inserted into the aerosol-generated article.

[0158] In one embodiment of this application, the cast film is wound at least one turn. In another embodiment of this application, the cast film is wound 1 turn, 2 turns, or 3 turns.

[0159] In one embodiment of this application, the step of obtaining a heating element by sintering a green blank specifically includes:

[0160] First sintering;

[0161] After cooling, a second sintering process is carried out.

[0162] In one embodiment of this application, the first sintering process is used to sinter the heating unit, the first electrode, and the second electrode on the surface of the heating substrate, and the second sintering process is used to sinter the solder, so that the first electrode and the second electrode can be connected to the conductive pin.

[0163] In one embodiment of this application, multiple heating units are printed on the surface of the heating substrate, and then dried for about 30 minutes. Then, a first electrode and a second electrode are printed at both ends of the multiple heating units, and then dried for about 30 minutes.

[0164] In one embodiment of this application, after the second sintering, a protective medium is applied to the heating element, followed by a third sintering to form a protective layer. The protective layer enhances the surface structural strength of the heating element and also insulates the heating element from the outside. In one embodiment of this application, the protective layer includes an enamel layer and an anti-stick coating.

[0165] In one embodiment of this application, the cast film may include a high-temperature cast film or a low-temperature cast film. It should be noted that the sintering temperature of the high-temperature cast film is higher than that of the low-temperature cast film. In one embodiment of this application, the sintering temperature of the high-temperature cast film is 1500℃-1600℃, and the sintering temperature of the low-temperature cast film is 800℃-1000℃.

[0166] In one embodiment of this application, the cast sheet includes a high-temperature cast sheet, which comprises silicon dioxide, alumina, zirconium oxide, aluminum nitride, silicon nitride, and silicon carbide. In another embodiment, the high-temperature cast sheet comprises zirconium oxide-toughened alumina ceramic. In this case, the heating element can be tungsten paste, and the first sintering temperature is 1500℃-1600℃. In one embodiment of this application, when the heating element is tungsten paste, the atmosphere for the first sintering is a reducing atmosphere.

[0167] In one embodiment of this application, the cast sheet includes a low-temperature cast sheet, which comprises glass powder and one or more of alumina, zirconium oxide, aluminum nitride, or silicon carbide. In another embodiment, the low-temperature cast sheet includes a low-temperature co-fired ceramic substrate. In this case, the heating element can be a silver-palladium paste, and the first sintering temperature is 800℃-1000℃ or 850℃-950℃. In one embodiment, when the heating element is a silver-palladium paste, the first sintering can be performed in an air atmosphere.

[0168] In one embodiment of this application, after the first sintering, the method for preparing the heating component further includes: drilling a hole at one end of the first electrode and the second electrode to form a first connection hole, filling the first connection hole with silver paste, and then performing a second sintering at a temperature of 800℃-1000℃, wherein the silver paste facilitates the connection of the first electrode and the second electrode to the conductive pin.

[0169] In one embodiment of this application, when at least one of the first electrode and the second electrode is located on a non-outermost winding layer, or when at least one of the first electrode and the second electrode is located on the inner surface of the outermost winding layer, a second connection hole needs to be made at the first connection hole corresponding to the heating substrate. Silver paste is filled into the first connection hole and the second connection hole, and then a second sintering is performed. The second sintering temperature is 800℃-1000℃. The first connection hole and the second connection hole are used to electrically connect the corresponding conductive pins. The silver paste facilitates the connection of the first electrode and the second electrode to the conductive pins.

[0170] In one embodiment of this application, after the cast sheet is wound to form a green blank, the method further includes performing an isostatic pressing process on the green blank. The isostatic pressing process can mechanically form a uniform plane on the outer surface of the heating element, so that the heating element changes from the state in Figure 5 to the state in Figure 6.

[0171] In one embodiment of this application, before forming a casting film by printing first and second electrodes at both ends of the plurality of heating units, the method may further include printing first and second conductive units at both ends of the heating units. In one embodiment of this application, the first and second conductive units are made of the same material as the heating units, but the widths of the first and second conductive units are larger, thus resulting in lower resistance and less heat generation. The contact area between the first conductive unit and the first electrode is larger, thereby reducing the contact resistance between the first electrode and the heating unit; similarly, the contact area between the second conductive unit and the second electrode is larger, thereby reducing the contact resistance between the second electrode and the heating unit.

[0172] In one embodiment of this application, before printing the first electrode and the second electrode, the method further includes printing a first transition layer and a second transition layer on the surfaces of the first conductive unit and the second conductive unit. The first transition layer makes the contact between the first conductive layer and the first electrode tighter and stronger, and the second transition layer makes the contact between the second conductive layer and the second electrode tighter and stronger.

[0173] An embodiment of this application also provides an aerosol generating device 100, as shown in FIG8, including a battery assembly 20 and the aforementioned heating assembly 10, wherein the battery assembly 20 provides electrical energy to the heating assembly 10.

[0174] It should be noted that the preferred embodiments of this application are given in the specification and drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A heat generating component, characterized by include: Heating substrate; A heating layer is disposed on the heating substrate, the heating substrate is wound to form a column, the heating layer includes a first electrode, a second electrode and a plurality of heating units, the plurality of heating units are spaced apart along the axial direction of the winding direction of the heating substrate, each heating unit extends along the winding direction of the heating substrate, and each heating unit is electrically connected to the first electrode and the second electrode.

2. The heat generating component of claim 1, wherein, The dimension of the heating unit in the axial direction of the winding direction of the heating substrate is the width of the heating unit, and at least one heating unit has a different width from the other heating units; or, Each of the heating elements has the same dimension in the axial direction of the winding direction of the heating substrate.

3. The heat generating component of claim 1, wherein, The width of the plurality of heating elements gradually changes along the axial direction of the winding direction of the heating substrate.

4. The heat generating component of claim 1, wherein, In the axial direction of the winding direction of the heating substrate, the distance between any two adjacent heating units is L, wherein at least one L is not equal to the other L; or, In the axial direction of the winding direction of the heating substrate, the spacing between any two adjacent heating units is equal.

5. The heat generating component of claim 1, wherein, The density of the plurality of heating elements gradually changes along the axial direction of the winding direction of the heating substrate.

6. The heat generating component of claim 1, wherein, One end of each heating unit is electrically connected to the first electrode, and the other end is electrically connected to the second electrode.

7. The heat generating assembly of claim 6, wherein, At least one of the first electrode and the second electrode extends along the axial direction of the winding direction of the heating substrate.

8. The heat generating component of claim 1, wherein, When the heating substrate is wound to form a columnar structure, the heating substrate includes at least one wound layer.

9. The heat generating component of claim 8, wherein, The heating layer is wound 0.8-3 times.

10. The heat generating component of claim 8, wherein, When the heating substrate is wound to form a columnar structure, the innermost or outermost winding layer does not have the heating layer.

11. The heat generating component of claim 8, wherein, When at least one of the first electrode and the second electrode is located on a non-outermost winding layer, or when at least one of the first electrode and the second electrode is located on the inner surface of the outermost winding layer, a first connection hole is provided on the corresponding first electrode or the second electrode, and a second connection hole is provided on the heating substrate at a position corresponding to the first connection hole. The first connection hole and the second connection hole are used to electrically connect the corresponding conductive pins.

12. The heat generating component of claim 11, wherein, At least one of the first electrode and the second electrode includes a first segment and a second segment connected to the first segment. The first segment is used to electrically connect the heating unit, and the second segment extends along the winding direction of the heating substrate. The first connection hole is provided on the second segment.

13. The heat generating component of claim 12, wherein, The first connecting hole is a round hole, an elliptical hole, an oblong hole, or a long strip hole.

14. The heat generating component of claim 8, wherein, When at least one of the first electrode and the second electrode is located on the outer surface of the outermost winding layer, the first electrode or the second electrode is electrically connected to the corresponding conductive pin.

15. The heat generating component of claim 6, wherein, The heating layer further includes a first conductive unit and a second conductive unit. The first conductive unit is located between the heating unit and the first electrode to electrically connect the heating unit to the first electrode, and the second conductive unit is located between the heating unit and the second electrode to electrically connect the heating unit to the second electrode.

16. The heat generating component of claim 1, wherein, In the axial direction of the winding direction of the heating substrate, the heating substrate includes a first edge and a second edge opposite to each other, a distance L1 between the heating unit closest to the first edge and the first edge, and a distance L2 between the heating unit closest to the second edge and the second edge, wherein L1 and L2 are not equal.

17. The heat generating component of claim 1, wherein, It also includes a support member, around which the heating substrate is wound to form a column.

18. The heat generating component of claim 17, wherein, The support member includes an insertion part and a support part connected to the insertion part, the heating substrate is wound around the support part, and the insertion part protrudes from the heating substrate.

19. The heat generating component of claim 18, wherein, The insertion part is conical.

20. The heat generating component of claim 18, wherein, In the axial direction of the winding direction of the heating substrate, the length of the heating substrate is greater than or equal to the length of the support portion.

21. The heat generating component of claim 18, wherein, The length of the heating substrate in the axial direction of its winding direction is less than the length of the support portion.

22. The heat generating component of claim 18, wherein, The length of the support portion in the axial direction of the winding direction of the heating substrate is greater than or equal to 3.5 mm.

23. The heat generating component of claim 17, wherein, The support member is provided with a clearance portion, which extends along the axis of the support member, and the edge of the heating substrate is located at the clearance portion.

24. The heat generating component of claim 1, wherein, The heating layer is disposed on the surface of the heating substrate.

25. The heat generating component of claim 1, wherein, The heating layer is disposed on the radially inward surface or the radially outward surface of the heating substrate.

26. The heat generating component of claim 1, wherein, The heating layer has a dimension of 6mm-15mm along the axial direction of the winding direction; and / or the heating layer has a dimension of 8mm-11mm along the axial direction of the winding direction.

27. The heat generating component of claim 1, wherein, The dimension of the heating unit along the axial direction of the winding direction is greater than or equal to 0.20 mm.

28. The heat generating component of claim 1, wherein, In the axial direction of the winding direction of the heating substrate, the distance between two adjacent heating units is greater than or equal to 0.20 mm.

29. The heat generating component of claim 1, wherein, The thickness of the heating layer is 5μm-30μm; and / or the thickness of the heating layer is 8μm-20μm; and / or the thickness of the heating layer is 10μm-18μm; and / or the thickness of the heating layer is 12μm-18μm.

30. The heat generating component of claim 1, wherein, The thickness of the first electrode or the second electrode is 5μm-30μm; and / or the thickness of the first electrode or the second electrode is 8μm-20μm; and / or the thickness of the first electrode or the second electrode is 10μm-18μm; and / or the thickness of the first electrode or the second electrode is 12μm-18μm.

31. The heat generating component of claim 1, wherein, The thickness of the heating substrate is 0.08mm-0.35mm; and / or the thickness of the heating substrate is 0.10mm-0.20mm.

32. The heat generating component of claim 1, wherein, The diameter of the heating element is greater than or equal to 2 mm.

33. The heat generating component of claim 1, wherein, The heating layer contains tungsten, silver, or palladium.

34. The heat generating component of claim 1, wherein, The first electrode and the second electrode include silver paste electrodes.

35. A method for preparing a heating element, characterized in that, include: Obtain the cast film as the heating substrate; A heating layer is printed on the surface of the heating substrate; The cast sheet is wound to form a green blank; The green blank is sintered to obtain a heating element.

36. The method of claim 35, wherein the heating element is formed by the steps of: The step of printing a heating layer on the surface of the heating substrate specifically includes: Multiple heating elements are printed on the surface of the heating substrate, and the multiple heating elements are arranged at intervals. A first electrode and a second electrode are printed at both ends of the plurality of heating units, respectively.

37. The method for preparing the heating element according to claim 35, characterized in that, Before the cast sheet is wound to form a green blank, a support is provided, and the cast sheet is wound circumferentially along the support; or After the cast sheet is wound to form a green blank, a support is provided, which is inserted into the green blank.

38. The method for preparing the heating element according to claim 35, characterized in that, The number of turns of the cast film is greater than or equal to 1.

39. The method of claim 35, wherein the heating element is formed by a process selected from the group consisting of: sintering, extrusion, injection molding, and combinations thereof. The step of sintering the green blank to obtain the heating assembly specifically includes: First sintering; After cooling, a second sintering process is carried out.

40. The method of claim 39, wherein the heating element is prepared by the steps of: After the second sintering, a protective medium is applied to the heating element, and a third sintering is performed to form a protective layer.

41. The method for preparing the heating element according to claim 35, characterized in that, The cast sheet comprises one or more of silicon dioxide, alumina, zirconium oxide, aluminum nitride, silicon nitride, and silicon carbide; and / or the cast sheet comprises zirconium oxide toughened alumina ceramic.

42. The method of claim 39, wherein the heating element is prepared by the steps of: The heating unit includes tungsten paste, and the temperature of the first sintering is 1500℃-1600℃.

43. The method of claim 39, wherein the heating element is formed by a process selected from the group consisting of: sintering, extrusion, injection molding, and compression molding. The first sintering atmosphere is a reducing atmosphere.

44. The method for preparing the heating element according to claim 35, characterized in that, The cast film comprises glass powder and one or more of alumina, zirconium oxide, aluminum nitride, or silicon carbide.

45. The method of claim 39, wherein the heating element is prepared by the steps of: providing a substrate; providing a heating element; and attaching the heating element to the substrate. The heating unit includes silver-palladium paste, and the temperature of the first sintering is 800℃-1000℃ or 850℃-950℃.

46. The method of claim 39, wherein the heating element is prepared by the steps of: After the first sintering, the method further includes: A first connection hole is formed by drilling at one end of the first electrode and the second electrode. The first connection hole is filled with silver paste and then a second sintering is performed. The second sintering temperature is 800℃-1000℃.

47. The method of claim 35, wherein the heating element is formed by a process selected from the group consisting of: sintering, extrusion, injection molding, and combinations thereof. After the cast sheet is wound to form a green blank, the method further includes: performing an isostatic pressing process on the green blank.

48. The method for preparing the heating element according to claim 35, characterized in that, Before forming a casting film by printing a first electrode and a second electrode at both ends of the plurality of heating units, the method further includes: printing a first conductive unit and a second conductive unit at both ends of the heating units.

49. The method of claim 48, wherein the heating element is prepared by the steps of: Before printing the first electrode and the second electrode, the method further includes printing a first transition layer and a second transition layer on the surfaces of the first conductive unit and the second conductive unit.

50. An aerosol-generating device comprising: It includes a battery assembly and a heating component as described in any one of claims 1-34, wherein the battery assembly is used to provide electrical energy to the heating component.

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