Preparation method for heating assembly, heating assembly and aerosol generation device

Abstract

Provided are a preparation method for a heating assembly (10), the heating assembly (10), and an aerosol generation device (100). The preparation method for the heating assembly (10) comprises: providing a support tube (1); providing a thermal barrier zone (11) on the support tube (1); and applying a heating coating (2) onto the outer surface of the support tube (1), the heating coating (2) covering the thermal barrier zone (11). The provision of the thermal barrier zone (11) can slow down the transfer of heat, enabling heat to concentrate within a predetermined area; moreover, since the thermal barrier zone (11) is disposed on the support tube (1), there is no need to machine a thermal barrier structure at the heating coating (2); in this way, the heating coating (2) can be formed as a complete coating structure, thereby preventing the formation of microcracks at the heating coating (2) due to machining. In addition, the complete coating structure, which has a complete layered configuration, provides stronger compression resistance.

Description

Preparation method of heating component, heating component and aerosol generation device

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411585455.4, filed on November 7, 2024, entitled "Method for preparing a heating component, heating component and aerosol generating device", the entire contents of which are incorporated herein by reference.

[0003] Technical Field

[0004] This application relates to the field of aerosol generation technology, and in particular to heating components for aerosol generation apparatus and methods for preparing the heating components. Background Technology

[0005] An aerosol generating device is a device that generates aerosols by heating an aerosol-generating product without combustion. The aerosol generating device includes a heating assembly that heats the aerosol-generating product. In the prior art, the heating assembly includes a support tube and a heating coating disposed on the support tube. The heating layer of the heating coating includes multiple sub-heating layers, and different sections of the aerosol-generating product can be heated by controlling the operation of different sub-heating layers. Therefore, according to control requirements or the required aerosol generation amount, the heating of corresponding sub-heating layers can be selectively controlled in sequence. For example, in the initial stage of starting the aerosol generating device, in order to shorten the aerosol generation time, heating can be applied to a specific section of the aerosol-generating product, and the heating power during this period can be greater than the heating power in other stages.

[0006] In order to increase the heat concentration in the corresponding section of the aerosol-generated product, certain measures need to be taken to confine the heat within the corresponding section.

[0007] In related technologies, a heat-insulating zone is set on the outer peripheral wall of the heating component, allowing heat to be concentrated within the corresponding area for focused heating of the aerosol matrix at that location. However, the process of setting the heat-insulating zone can lead to microcracks in the heating coating. Due to the presence of these microcracks, there is a risk of their expansion during repeated use and heating of the aerosol generating device, potentially causing the heating component to fail. This shortens the lifespan of the heating component and affects the overall lifespan of the aerosol generating device.

[0008] Application content

[0009] To address the issue of cracks appearing in the heating coating, which affects the heating effect of the heating component on the aerosol-generated product and thus the user's inhalation experience.

[0010] This application provides a method for preparing a heating component, comprising:

[0011] Provide a support tube;

[0012] A heat-resistant zone is cut into the support tube, and the heat-resistant zone separates the support tube into at least one heat-conducting zone.

[0013] A heating coating is applied to the outer surface of the support tube, and the heating coating covers the heat-insulating area and at least one of the heat-conducting areas.

[0014] This application provides a method for preparing a heating component, wherein the step of cutting to form a heat-insulating region on the support tube includes: obtaining the heat-insulating region on the support tube by mechanical processing or laser cutting.

[0015] This application provides a method for preparing a heating component, wherein the heat-resistant region includes a connecting portion and a recessed portion, the recessed portion being a through hole or a groove, and the connecting portion and the recessed portion being disposed adjacent to each other.

[0016] This application provides a method for preparing a heating component, wherein the recessed portion extends in an arc or spiral shape in the circumferential direction of the support tube.

[0017] This application provides a method for preparing a heating component, wherein the length of the connecting portion in the circumferential direction of the support tube is 0.3mm-2mm; and / or the length of the recessed portion in the circumferential direction of the support tube is 0.05mm-0.5mm.

[0018] This application provides a method for manufacturing a heating component, wherein the total length of all the connecting parts in the circumferential direction of the support tube accounts for less than or equal to 50% of the circumference of the support tube.

[0019] This application provides a method for preparing a heating component, wherein the number of connecting parts is greater than or equal to three.

[0020] This application provides a method for preparing a heating component, wherein the step of setting a heat-insulating region on the support tube includes: setting a heat-insulating material in the heat-insulating region.

[0021] This application provides a method for preparing a heating component, wherein the thermal conductivity of the insulation material is 1.4 W / (m•K) - 4 W / (m•K).

[0022] This application provides a method for preparing a heating component, wherein the step of coating the outer surface of the support tube with a heating coating specifically includes: coating the outer surface of the support tube with a first insulating layer.

[0023] This application provides a method for preparing a heating component, wherein the step of coating the outer surface of the support tube with a heating coating further includes: coating the first insulating layer with a heating layer.

[0024] This application provides a method for preparing a heating component, wherein the heating layer includes a plurality of sub-heating layers, and there is a gap between two adjacent sub-heating layers, and the gap and the heat-insulating region are arranged opposite to each other.

[0025] This application provides a method for preparing a heating component, wherein the resistance of the sub-heating layer is 0.35Ω-1.0Ω; and / or the resistance of the sub-heating layer is 0.45Ω-0.8Ω.

[0026] This application provides a method for preparing a heating component, wherein the step of coating a heating coating on the outer surface of the support tube further includes: coating a second insulating layer on the heating layer.

[0027] This application provides a method for preparing a heating component, wherein the thickness of the first insulating layer or the second insulating layer is 15μm-30μm.

[0028] This application provides a method for preparing a heating component, wherein the thermal conductivity of the first insulating layer and the second insulating layer is 1.4 W / (m•K) - 4 W / (m•K).

[0029] This application provides a method for preparing a heating component, wherein the step of coating a heating layer on the first insulating layer includes: setting a first electrode and a second electrode on the first insulating layer, wherein the first electrode and the second electrode are electrically connected to the heating layer.

[0030] This application provides a method for preparing a heating component, wherein the thickness of the support tube is 0.05mm-0.3mm; and / or the thickness of the support tube is 0.1mm-0.2mm.

[0031] This application provides a method for preparing a heating component, wherein the thermal conductivity of the support tube is greater than or equal to 15 W / (m•K).

[0032] This application provides a heating assembly, including:

[0033] A support tube, the support tube comprising a heat-insulating region and a heat-conducting region, the heat-insulating region being used to block heat conduction between adjacent heat-conducting regions;

[0034] A heating coating is disposed on the outer surface of the support tube and covers the heat-insulating area and at least one of the heat-conducting areas.

[0035] This application provides a heating component, wherein there are multiple heat-conducting zones, and at least one heat-insulating zone is provided between any two adjacent heat-conducting zones.

[0036] This application provides a heating assembly, wherein there are multiple heat-resistant zones, and the multiple heat-resistant zones are distributed along the axis of the support tube.

[0037] This application provides a heating assembly, wherein the heat-resistant area includes a connecting portion and a recessed portion, the recessed portion being a through hole or a groove, and the connecting portion and the recessed portion being disposed adjacent to each other.

[0038] This application provides a heating assembly in which the recessed portion extends in an arc or spiral shape in the circumferential direction of the support tube.

[0039] This application provides a heating assembly, wherein the length of the connecting portion in the circumferential direction of the support tube is 0.3mm-2mm; and / or the length of the recessed portion in the circumferential direction of the support tube is 0.05mm-0.5mm.

[0040] This application provides a heating assembly in which the total length of all the connecting parts in the circumferential direction of the support tube accounts for less than or equal to 50% of the circumference of the support tube.

[0041] This application provides a heating assembly, wherein the number of connecting parts is greater than or equal to three.

[0042] This application provides a heating component, wherein a heat-insulating material is disposed in the heat-resistant zone.

[0043] This application provides a heating assembly in which the thermal conductivity of the insulation material is 1.4 W / (m•K) - 4 W / (m•K).

[0044] This application provides a heating component, wherein the heating coating includes a first insulating layer, a heating layer and a second insulating layer stacked sequentially, the first insulating layer being disposed on the outer surface of the support tube and the heating layer being disposed between the first insulating layer and the second insulating layer.

[0045] This application provides a heating assembly, wherein the heating layer includes a plurality of sub-heating layers, a gap region is provided between two adjacent sub-heating layers, the gap region and the heat-insulating region are disposed opposite to each other, and the sub-heating layer and the heat-conducting region are disposed opposite to each other.

[0046] This application provides a heating assembly in which the resistance of the sub-heating layer is 0.35Ω-1.0Ω; and / or the resistance of the sub-heating layer is 0.45Ω-0.8Ω.

[0047] This application provides a heating component, wherein the thickness of the first insulating layer or the second insulating layer is 15μm-30μm.

[0048] This application provides a heating assembly in which the thermal conductivity of the first insulating layer and the second insulating layer is 1.4 W / (m•K) - 4 W / (m•K).

[0049] This application provides a heating assembly, wherein the thickness of the support tube is 0.05mm-0.3mm; and / or the thickness of the support tube is 0.1mm-0.2mm.

[0050] This application provides a heating assembly in which the thermal conductivity of the support tube is greater than or equal to 15 W / (m•K).

[0051] This application provides a heating assembly, wherein the heating coating includes a first electrode and a second electrode disposed opposite to each other, and both the first electrode and the second electrode are electrically connected to the heating layer.

[0052] This application provides an aerosol generating device, including a battery assembly and the aforementioned heating assembly, wherein the battery assembly provides electrical energy to the heating assembly.

[0053] This application, by setting a heat-insulating zone, can slow down heat transfer and concentrate heat within a predetermined area. Simultaneously, since the heat-insulating zone is located on the support tube, there is no need to process a heat-insulating structure at the heating coating, allowing the heating coating to be a complete coating structure. This avoids micro-cracks formed at the heating coating due to machining. Furthermore, the complete coating structure has a complete layered structure, resulting in stronger compressive strength. Attached Figure Description

[0054] 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.

[0055] Figure 1 is a schematic diagram of a method for preparing a heating component according to an embodiment of this application;

[0056] Figure 2 is a schematic diagram of a heating assembly according to an embodiment of this application;

[0057] Figure 3 is a schematic diagram of a heat-generating coating according to an embodiment of this application;

[0058] Figure 4 is a schematic diagram of a heating assembly according to an embodiment of this application;

[0059] Figure 5 is a schematic diagram of a heat-generating coating according to an embodiment of this application;

[0060] Figure 6 is a schematic diagram of an aerosol generating apparatus according to an embodiment of this application.

[0061] In the picture:

[0062] 10. Heating components;

[0063] 1. Support tube; 11. Heat-insulating zone; 111. Connecting part; 112. Recessed part; 12. Heat-conducting zone;

[0064] 2. Heating coating; 21. First insulating layer; 22. Heating layer; 221. Sub-heating layer; 222. Spacing region; 23. Second insulating layer; 24. First electrode; 25. Second electrode;

[0065] 20. Battery components;

[0066] 100. Aerosol generating device. Embodiments of the present invention

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] It should be noted that the embodiments of this application provide a method for preparing a heating component, a heating component, and an aerosol generating device. The aerosol generating device can be used in conjunction with an aerosol generating product to generate aerosol.

[0072] 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.

[0073] As used herein, the term "aerosol-generating matrix" refers to a matrix capable of releasing volatile substances to form inhalable aerosols. An aerosol-generating matrix may include tobacco-containing materials containing volatile tobacco flavor compounds that are released from the substrate upon heating. Specifically, an aerosol-generating matrix may be a tobacco-containing aerosol-generating matrix or an aerosol-generating matrix containing solid tobacco. Alternatively, an aerosol-generating matrix may include non-tobacco materials. An aerosol-generating matrix may also include aerosol-forming agents. Examples of suitable aerosol-forming agents are glycerol and propylene glycol.

[0074] As needed, the aerosol generating matrix may contain additional tobacco or non-tobacco volatile aroma compounds released when the aerosol generating matrix is ​​heated. The aerosol generating matrix may also contain microcapsules, which may contain additional tobacco or non-tobacco volatile aroma compounds, and such microcapsules may melt during heating of the solid aerosol generating matrix.

[0075] 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.

[0076] The heating element releases heat to the aerosol-generating matrix, causing volatile substances to be produced. 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 produced by the matrix can exit from the proximal end of the matrix and be inhaled into the user's mouth.

[0077] This application provides a method for preparing a heating component, comprising:

[0078] Provide a support tube;

[0079] A heat-insulating zone is formed by cutting on the support tube, and the heat-insulating zone separates the support tube into at least one heat-conducting zone.

[0080] A heating coating is applied to the outer surface of the support tube, and the heating coating covers the heat-insulating area and at least one heat-conducting area.

[0081] This application first sets a heat-insulating zone on the support tube, and then coats the outer surface of the support tube with a heating coating. In this way, the heat-insulating zone slows down heat transfer, concentrating heat within a predetermined area. Simultaneously, since the heat-insulating zone is located on the support tube, there is no need to process a heat-insulating structure at the heating coating site, allowing the heating coating to be a complete coating structure. This avoids micro-cracks formed at the heating coating site due to machining. Furthermore, the complete coating structure has a complete layered structure, resulting in stronger compressive strength.

[0082] In some embodiments, the heating coating also has a sealing effect on the heat-insulating area, which makes the peripheral wall of the support tube have good sealing performance, so that the heating component can heat the aerosol-generated product well and users can obtain a good suction experience.

[0083] In one embodiment of this application, the support tube may include metal or alloy. In one embodiment of this application, the support tube may include stainless steel and aluminum alloy. In one embodiment of this application, the support tube has good thermal conductivity, with a thermal conductivity greater than or equal to 15 W / (m•K). In one embodiment of this application, when the support tube is stainless steel, its thermal conductivity is 15 W / (m•K)-30 W / (m•K). In one embodiment of this application, when the support tube is aluminum alloy, its thermal conductivity is 155 W / (m•K)-236 W / (m•K). In one embodiment of this application, the thickness of the support tube is 0.05 mm-0.3 mm. In one embodiment of this application, the thickness of the support tube is 0.1 mm-0.2 mm. In one embodiment of this application, the thickness of the support tube is 0.05 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, or 0.3 mm.

[0084] In one embodiment of this application, the step of cutting to form a heat-insulating region on the support tube includes: forming the heat-insulating region on the support tube by machining or laser cutting. In one embodiment of this application, the machining or laser cutting includes computer-controlled precision machining or laser cutting.

[0085] In one embodiment of this application, there are multiple heat-conducting areas, and at least one heat-insulating area is provided between any two adjacent heat-conducting areas. In another embodiment of this application, the number of heat-conducting areas is two or three.

[0086] In one embodiment of this application, there are multiple heat-insulating zones, which are distributed along the axis of the support tube.

[0087] In one embodiment of this application, the heat-insulating region includes a connecting portion and a recessed portion, wherein the recessed portion is a through hole or a groove, and the connecting portion and the recessed portion are disposed adjacent to each other. In one embodiment of this application, the recessed portion is used to block heat conduction in the heat-conducting regions separated by the heat-insulating region on the support tube, and the connecting portion ensures that the heat-conducting regions separated by the heat-insulating region on the support tube remain structurally connected.

[0088] In one embodiment of this application, the heat-insulating zone includes a dummy break line extending circumferentially along the support tube. It should be noted that the "dummy break line" here can be understood as a pattern formed by the structure of the heat-insulating zone on the outer surface of the support tube. For example, when the heat-insulating zone includes a connecting portion and a recessed portion, the connecting portion forms a solid line segment on the surface of the support tube, and the recessed portion forms a dashed line segment on the surface of the support tube. The solid and dashed line segments are arranged alternately along the circumferential direction of the support tube on the outer surface of the support tube to form the "dummy break line." In one embodiment of this application, the heat-insulating zone between two adjacent heat-conducting zones includes multiple dummy break lines, resulting in a better heat-insulating effect of the heat-insulating zone on the heat-conducting zone.

[0089] In one embodiment of this application, the recess extends in an arc or spiral shape in the circumferential direction of the support tube.

[0090] In one embodiment of this application, the length of the connecting portion in the circumferential direction of the support tube is 0.3mm-2mm. And / or, in one embodiment of this application, the length of the connecting portion in the circumferential direction of the support tube is 0.5mm-2mm. That is, in one embodiment of this application, the length of the connecting portion in the circumferential direction of the support tube is 0.3mm-2mm, and the length of the connecting portion in the circumferential direction of the support tube is also 0.5mm-2mm; in another embodiment of this application, the length of the connecting portion in the circumferential direction of the support tube is 0.3mm-2mm, or 0.5mm-2mm. In one embodiment of this application, the length of the connecting portion in the circumferential direction of the support tube is 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, or 2mm. The connecting portion structurally maintains the connection between the heat-conducting areas on the support tube.

[0091] In one embodiment of this application, the length of the recess in the circumferential direction of the support tube is 0.05mm-0.5mm. In one embodiment of this application, the length of the recess in the circumferential direction of the support tube is 0.1mm-0.3mm. In one embodiment of this application, the length of the recess in the circumferential direction of the support tube is 0.05mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm.

[0092] In one embodiment of this application, the total length of all connecting portions in the circumferential direction of the support tube is less than or equal to 50% of the circumference of the support tube. This ensures that the connecting portions maintain the structural connection between the heat-conducting areas separated by the heat-insulating zone and possess a certain connection strength. In one embodiment of this application, the circumference of the support tube refers to the circumference of the cross-section of the support tube.

[0093] In one embodiment of this application, the number of connecting parts is greater than or equal to three, so that the connecting parts can ensure that the heat-conducting areas separated by the heat-insulating areas remain structurally connected and have a certain connection strength.

[0094] In one embodiment of this application, the step of setting a heat-insulating zone on the support tube includes: setting a heat-insulating material in the heat-insulating zone. Setting a heat-insulating material in the heat-insulating zone allows the heat-insulating material to seal the heat-insulating zone, giving the heat-insulating zone better structural strength, preventing air from flowing out of the heat-insulating zone, and providing good heat insulation effect.

[0095] In one embodiment of this application, the thermal conductivity of the insulation material is 1.4 W / (m•K) - 4 W / (m•K). The thermal conductivity of the insulation material is smaller than that of the support tube, making it difficult for the heat in the heat-conducting areas separated by the heat-insulating area on the support tube to be conducted to each other.

[0096] In one embodiment of this application, the step of coating the outer surface of the support tube with a heating coating specifically includes coating the outer surface of the support tube with a first insulating layer. It should be noted that the slurry constituting the first insulating layer is coated on the outer surface of the support tube. Considering the fluidity of the slurry, it can seal the heat-resistant area to achieve a sealing purpose. It is understood that the first insulating layer can seal the heat-resistant area, making the support tube form a sealed tube structure and preventing air leakage from the heat-resistant area. In this way, the sealing step and the coating of the first insulating layer can be integrated into a single step, thereby eliminating the need for a separate process of sealing the support tube and simplifying the process of the heating assembly. In one embodiment of this application, to ensure the sealing effect of the first insulating layer on the heat-resistant area, multiple layers of the first insulating layer can be coated.

[0097] In one embodiment of this application, the step of coating the outer surface of the support tube with a heating coating further includes: coating the first insulating layer with a heating layer. In one embodiment of this application, the heating layer includes multiple sub-heating layers, with a gap between adjacent sub-heating layers, and the gap and heat-insulating regions are arranged opposite to each other. In one embodiment of this application, the sub-heating layers and the heat-conducting regions are arranged opposite to each other, such that the heat from the sub-heating layers can be conducted to the corresponding aerosol-generating article through the heat-conducting regions.

[0098] In one embodiment of this application, the resistance of the sub-heating layer is 0.35Ω-1.0Ω. And / or, in one embodiment of this application, the resistance of the sub-heating layer is 0.45Ω-0.8Ω. That is, among the aforementioned plurality of sub-heating layers, a portion of the sub-heating layers may have a resistance of 0.35Ω-1.0Ω, and another portion may have a resistance of 0.45Ω-0.8Ω; or in some embodiments, all the sub-heating layers may have a resistance of 0.35Ω-1.0Ω, or the resistance of the sub-heating layers may be 0.45Ω-0.8Ω. In one embodiment of this application, the resistance of the sub-heating layer is 0.35Ω, 0.40Ω, 0.45Ω, 0.50Ω, 0.6Ω, 0.65Ω, 0.8Ω, 0.9Ω, or 1.0Ω.

[0099] In one embodiment of this application, the step of coating the outer surface of the support tube with a heating coating further includes coating a second insulating layer onto the heating layer. The heating layer is located between the first insulating layer and the second insulating layer, thereby insulating the heating layer from the outside environment and preventing leakage.

[0100] In one embodiment of this application, the thickness of the first insulating layer or the second insulating layer is 15μm-30μm. In one embodiment of this application, the thickness of the first insulating layer is 15μm-30μm. In one embodiment of this application, the thickness of the first insulating layer is 15μm, 18μm, 20μm, 25μm, or 30μm. In one embodiment of this application, the thickness of the second insulating layer is 15μm-30μm. In one embodiment of this application, the thickness of the second insulating layer is 15μm, 18μm, 20μm, 25μm, or 30μm.

[0101] In one embodiment of this application, the thermal conductivity of the first insulating layer and the second insulating layer is 1.4 W / (m•K) - 4 W / (m•K), which makes it difficult for the heat generated by one sub-heating layer to be transferred to the heat-conducting area of ​​the support tube corresponding to the other sub-heating layer, and also makes it difficult for the heat generated by the heating layer to be transferred to the housing of the aerosol generating device.

[0102] In one embodiment of this application, the step of coating a heating layer on a first insulating layer includes: disposing a first electrode and a second electrode on the first insulating layer, wherein both the first electrode and the second electrode are electrically connected to the heating layer. In one embodiment of this application, multiple sub-heating layers are electrically connected to both the first electrode and the second electrode. In one embodiment of this application, the first electrode and the second electrode are disposed opposite to each other, and each sub-heating layer includes two arc-shaped heating surfaces located between the first electrode and the second electrode. The inclusion of two arc-shaped heating surfaces in each sub-heating layer ensures that the number of heating layers does not exceed one during printing, thereby guaranteeing a uniform resistance distribution and resulting in more uniform heating.

[0103] In one embodiment of this application, the method for fabricating a heating assembly includes: providing a pre-formed tube, the pre-formed tube comprising a plurality of sequentially connected support tubes; setting a heat-resistant region on the support tubes; and after coating the outer surface of the support tubes with a heating coating, further comprising cutting the pre-formed tube to separate the plurality of support tubes from each other. By setting a heat-resistant region on a pre-formed tube comprising a plurality of support tubes and then coating it with a heating coating, the process of setting the heat-resistant region and coating the heating coating can be completed simultaneously on the plurality of support tubes, greatly improving the fabrication efficiency of the heating assembly and shortening the process time.

[0104] One embodiment of this application provides a heating assembly 10, as shown in FIG1, including: a support tube 1, the support tube 1 including a heat-insulating region 11 and a heat-conducting region 12, the heat-insulating region 11 being used to block heat conduction from adjacent heat-conducting regions 12; and a heating coating 2, the heating coating 2 being disposed on the outer surface of the support tube 1 and covering the heat-insulating region 11 and at least one heat-conducting region 12.

[0105] This application first sets a heat-insulating region 11 on the support tube, and then coats the outer surface of the support tube 1 with a heating coating 2. In this way, the heat-insulating region 11 can slow down heat transfer, concentrating heat within a predetermined area. Simultaneously, since the heat-insulating region 11 is located on the support tube 1, there is no need to process a heat-insulating structure at the heating coating, allowing the heating coating 2 to be a complete coating structure. This avoids micro-cracks formed at the heating coating 2 due to machining. Furthermore, the complete coating structure has a complete layered structure, resulting in stronger compressive strength.

[0106] In some embodiments, the heating coating 2 also has a sealing effect on the heat-insulating area 11, which makes the surrounding wall of the support tube 1 have good sealing performance, so that the heating component 10 has a good heating effect on the aerosol generation product, and the user can obtain a good suction taste.

[0107] In one embodiment of this application, there are multiple heat-conducting areas 12, and at least one heat-insulating area 11 is provided between any two adjacent heat-conducting areas 12. In another embodiment of this application, the number of heat-conducting areas 12 is two or three.

[0108] In one embodiment of this application, there are multiple heat-insulating zones 11, which are distributed along the axis of the support tube 1.

[0109] In one embodiment of this application, the heat-insulating region 11 includes a dummy break line extending circumferentially along the support tube 1. It should be noted that the "dummy break line" here can be understood as a pattern formed by the structure of the heat-insulating region 11 on the outer surface of the support tube 1. For example, when the heat-insulating region 11 includes a connecting portion 111 and a recessed portion 112, the connecting portion 111 forms a solid line segment on the surface of the support tube 1, and the recessed portion 112 forms a dashed line segment on the surface of the support tube 1. The solid and dashed line segments are arranged alternately along the circumferential direction of the support tube on the outer surface of the support tube to form the "dummy break line". In some embodiments, a heat-insulating region 11 may have multiple dummy break lines, which are spaced apart along the axial direction of the support tube 1, resulting in a better heat-insulating effect of the heat-conducting region 12 on the heat-insulating region 11.

[0110] In one embodiment of this application, the heat-insulating area 11 includes a connecting portion 111 and a recessed portion 112, wherein the recessed portion 112 is a through hole or groove, and the connecting portion 111 and the recessed portion 112 are disposed adjacent to each other.

[0111] In one embodiment of this application, the recess 112 extends in an arc or spiral shape in the circumferential direction of the support tube 1.

[0112] In one embodiment of this application, the length of the connecting portion 111 in the circumferential direction of the support tube 1 is 0.3mm-2mm. In another embodiment, the length of the connecting portion 111 in the circumferential direction of the support tube 1 is 0.5mm-2mm. In yet another embodiment, the length of the connecting portion 111 in the circumferential direction of the support tube 1 is 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, or 2mm. The connecting portion 111 structurally maintains the connection between the heat-conducting area 12 on the support tube 1.

[0113] In one embodiment of this application, the length of the recess 112 in the circumferential direction of the support tube 1 is 0.05mm-0.5mm. In one embodiment of this application, the length of the recess 112 in the circumferential direction of the support tube 1 is 0.1mm-0.3mm. In one embodiment of this application, the length of the recess 112 in the circumferential direction of the support tube 1 is 0.05mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm.

[0114] In one embodiment of this application, the total length of all connecting portions 111 in the circumferential direction of the support tube 1 is less than or equal to 50% of the circumference of the support tube 1, so that the connecting portions 111 can ensure that the heat-conducting areas 12 separated by the heat-insulating area 11 remain structurally connected and have a certain connection strength. In one embodiment of this application, the circumference of the support tube 1 refers to the circumference of the cross-section of the support tube 1.

[0115] In one embodiment of this application, the number of connecting parts 111 is greater than or equal to three, so that the connecting parts 111 can ensure that the heat-conducting areas 12 separated by the heat-insulating area 11 remain structurally connected and have a certain connection strength.

[0116] In one embodiment of this application, a heat-insulating material is provided in the heat-insulating area 11. The heat-insulating material can seal the heat-insulating area 11, so that the heat-insulating area 11 has better structural strength, prevents air from flowing out of the heat-insulating area 11, and has a good heat insulation effect.

[0117] In one embodiment of this application, the thermal conductivity of the insulation material is 1.4 W / (m•K) - 4 W / (m•K). The thermal conductivity of the insulation material is smaller than that of the support tube 1, which makes it difficult for the heat of the heat-conducting areas 12 separated by the heat-insulating area 11 on the support tube 1 to be conducted to each other.

[0118] In one embodiment of this application, referring to Figures 3 and 4, the heating coating 2 includes a first insulating layer 21, a heating layer 22, and a second insulating layer 23 stacked sequentially. The first insulating layer 21 is disposed on the outer surface of the support tube 1, and the heating layer 22 is disposed between the first insulating layer 21 and the second insulating layer 23. The first insulating layer 21 seals the heat-insulating area 11, preventing air leakage from the heat-insulating area within the support tube 1. The heating layer 22, located between the first insulating layer 21 and the second insulating layer 23, is insulated from the outside environment, preventing leakage. In one embodiment of this application, to ensure the sealing effect of the first insulating layer 21 on the heat-insulating area 11, multiple layers of the first insulating layer 21 can be coated.

[0119] In one embodiment of this application, please refer to section 5. The heating layer 22 includes a plurality of sub-heating layers 221, with a spacer region 222 between adjacent sub-heating layers 221. The spacer region 222 and the heat-insulating region 11 are disposed opposite to each other, and the sub-heating layer 221 is disposed opposite to the heat-conducting region 12. In one embodiment of this application, the sub-heating layer 221 and the heat-conducting region 12 are disposed opposite to each other, so that the heat of the sub-heating layer 221 can be conducted to the corresponding aerosol-generating article through the heat-conducting region 12.

[0120] In one embodiment of this application, the interval region 222 refers to the region where no sub-heating layer 221 is provided, and the interval region 222 will not generate heat.

[0121] In one embodiment of this application, the resistance of the sub-heating layer 221 is 0.35Ω-1.0Ω. In one embodiment of this application, the resistance of the sub-heating layer 221 is 0.45Ω-0.8Ω. In one embodiment of this application, the resistance of the sub-heating layer 221 is 0.35Ω, 0.40Ω, 0.45Ω, 0.50Ω, 0.6Ω, 0.65Ω, 0.8Ω, 0.9Ω, or 1.0Ω.

[0122] In one embodiment of this application, the thickness of the first insulating layer 21 or the second insulating layer 23 is 15μm-30μm. In one embodiment of this application, the thickness of the first insulating layer 21 is 15μm-30μm. In one embodiment of this application, the thickness of the first insulating layer 21 is 15μm, 18μm, 20μm, 25μm, or 30μm. In one embodiment of this application, the thickness of the second insulating layer 23 is 15μm-30μm. In one embodiment of this application, the thickness of the second insulating layer 23 is 15μm, 18μm, 20μm, 25μm, or 30μm.

[0123] In one embodiment of this application, the thermal conductivity of the first insulating layer and the second insulating layer is 1.4 W / (m•K) - 4 W / (m•K), which makes it difficult for the heat generated by one sub-heating layer 221 to be transferred to the heat-conducting area 12 of the support tube 1 corresponding to the other sub-heating layer 221, and also makes it difficult for the heat generated by the heating layer 2 to be transferred to the housing of the aerosol generating device 100.

[0124] In one embodiment of this application, the support tube 1 comprises metal or alloy. In one embodiment of this application, the support tube 1 comprises stainless steel and aluminum alloy. In one embodiment of this application, the support tube 1 has good thermal conductivity, with a thermal conductivity greater than or equal to 15 W / (m•K). In one embodiment of this application, when the support tube 1 is stainless steel, the thermal conductivity of the support tube 1 is 15 W / (m•K)-30 W / (m•K). In one embodiment of this application, when the support tube 1 is aluminum alloy, the thermal conductivity of the support tube 1 is 155 W / (m•K)-236 W / (m•K). In one embodiment of this application, the thickness of the support tube 1 is 0.05 mm-0.3 mm. Or, in one embodiment of this application, the thickness of the support tube 1 is 0.1 mm-0.2 mm. In one embodiment of this application, the thickness of the support tube 1 is 0.05 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, or 0.3 mm.

[0125] In one embodiment of this application, referring to Figure 5, the first electrode 24 and the second electrode 25 are both electrically connected to the heating layer 22. In one embodiment of this application, multiple sub-heating layers 221 are electrically connected to the first electrode 24 and the second electrode 25. In one embodiment of this application, the first electrode 24 and the second electrode 25 are arranged opposite to each other, and each sub-heating layer 221 includes two arc-shaped heating surfaces located between the first electrode 24 and the second electrode 25. The inclusion of two arc-shaped heating surfaces in each sub-heating layer 221 ensures that the number of heating layers 22 does not exceed one during printing, thereby guaranteeing a uniform resistance distribution and more uniform heating of the heating layer 22.

[0126] One embodiment of this application provides an aerosol generating device 100, as shown in FIG6, which includes a battery assembly 20 and the aforementioned heating assembly 10, wherein the battery assembly 20 provides electrical energy to the heating assembly 10.

[0127] It should be noted that the preferred embodiments of this application are given in the specification and accompanying 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 method for preparing a heating component, characterized in that, include: Provide a support tube; A heat-resistant zone is cut into the support tube, and the heat-resistant zone separates the support tube into at least one heat-conducting zone. A heating coating is applied to the outer surface of the support tube, and the heating coating covers the heat-insulating area and at least one of the heat-conducting areas.

2. The method for preparing the heating component according to claim 1, characterized in that, The step of cutting to form a heat-insulating area on the support tube includes: obtaining the heat-insulating area on the support tube by mechanical processing or laser cutting.

3. The method for preparing the heating component according to claim 1, characterized in that, The heat-insulating area includes a connecting portion and a recessed portion. The recessed portion is a through hole or a groove, and the connecting portion and the recessed portion are arranged adjacent to each other.

4. The method for preparing the heating component according to claim 3, characterized in that, The recessed portion extends in an arc or spiral shape in the circumferential direction of the support tube.

5. The method for preparing the heating component according to claim 3, characterized in that, The length of the connecting part in the circumferential direction of the support tube is 0.3mm-2mm; and / or the length of the recessed part in the circumferential direction of the support tube is 0.05mm-0.5mm.

6. The method for preparing the heating component according to claim 3, characterized in that, The total length of all the connecting parts in the circumferential direction of the support tube is less than or equal to 50% of the circumference of the support tube.

7. The method for preparing the heating component according to claim 3, characterized in that, The number of connecting parts is greater than or equal to 3.

8. The method for preparing the heating component according to claim 1, characterized in that, The step of setting a heat-insulating zone on the support tube includes: setting a heat-insulating material in the heat-insulating zone.

9. The method for preparing the heating component according to claim 1, characterized in that, The thermal conductivity of the insulation material is 1.4 W / (m•K) - 4 W / (m•K).

10. The method for preparing the heating component according to claim 1, characterized in that, The step of coating the outer surface of the support tube with a heating coating specifically includes coating the outer surface of the support tube with a first insulating layer.

11. The method for preparing the heating component according to claim 10, characterized in that, The step of coating the outer surface of the support tube with a heating coating further includes coating the first insulating layer with a heating layer.

12. The method for preparing the heating component according to claim 11, characterized in that, The heating layer includes multiple sub-heating layers, with a gap between adjacent sub-heating layers, and the gap and the heat-insulating zone are arranged opposite to each other.

13. The method for preparing the heating component according to claim 12, characterized in that, The resistance of the sub-heating layer is 0.35Ω-1.0Ω; and / or the resistance of the sub-heating layer is 0.45Ω-0.8Ω.

14. The method for preparing the heating component according to claim 10, characterized in that, The step of coating the outer surface of the support tube with a heating coating further includes coating the heating layer with a second insulating layer.

15. The method for preparing the heating component according to claim 14, characterized in that, The thickness of the first insulating layer or the second insulating layer is 15μm-30μm.

16. The method for preparing the heating component according to claim 14, characterized in that, The thermal conductivity of the first insulating layer and the second insulating layer is 1.4 W / (m•K) - 4 W / (m•K).

17. The method for preparing the heating component according to claim 10, characterized in that, The step of coating a heating layer on the first insulating layer includes: setting a first electrode and a second electrode on the first insulating layer, wherein the first electrode and the second electrode are electrically connected to the heating layer.

18. The method for preparing the heating component according to claim 1, characterized in that, The thickness of the support tube is 0.05mm-0.3mm; or the thickness of the support tube is 0.1mm-0.2mm.

19. The method for preparing the heating component according to claim 1, characterized in that, The thermal conductivity of the support tube is greater than or equal to 15 W / (m•K).

20. A heating assembly, characterized in that, include: A support tube, the support tube comprising a heat-insulating region and a heat-conducting region, the heat-insulating region being used to block heat conduction between adjacent heat-conducting regions; A heating coating is disposed on the outer surface of the support tube and covers the heat-insulating area and at least one of the heat-conducting areas.

21. The heating assembly according to claim 20, characterized in that, There are multiple heat-conducting zones, and at least one heat-insulating zone is provided between any two adjacent heat-conducting zones.

22. The heating assembly according to claim 20, characterized in that, The heat-insulating zone is multiple, and the multiple heat-insulating zones are distributed along the axis of the support tube.

23. The heating assembly according to claim 20, characterized in that, The heat-insulating area includes a connecting portion and a recessed portion, wherein the recessed portion is a through hole or groove, and the connecting portion and the recessed portion are arranged adjacent to each other.

24. The heating assembly according to claim 20, characterized in that, The heating coating includes a first insulating layer, a heating layer, and a second insulating layer stacked sequentially. The first insulating layer is disposed on the outer surface of the support tube, and the heating layer is disposed between the first insulating layer and the second insulating layer.

25. The heating assembly according to claim 24, characterized in that, The heating layer includes multiple sub-heating layers, with a gap between adjacent sub-heating layers. The gap and the heat-insulating zone are arranged opposite to each other, and the sub-heating layer is arranged opposite to the heat-conducting zone.

26. An aerosol generating apparatus, characterized in that, It includes a battery assembly and a heating assembly as described in claims 20-25, wherein the battery assembly provides electrical energy to the heating assembly.

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