Heating element, heating body assembly, and aerosol-generating device

Abstract

The application belongs to the technical field of aerosol generating devices, and provides a heating element, a heating element assembly and an aerosol generating device. The heating element comprises a heating element, a lead wire and an insulating base. The heating element is configured to generate heat after being electrified. One end of the lead wire is electrically connected to the heating element, and the other end is used for connecting an external circuit. The insulating base is connected to the heating element and covers at least one end of the lead wire connected to the heating element. The heating element provided by the application can improve the technical problem of low reliability of the heating element in the related art.

Description

Technical Field

[0001] This application belongs to the technical field of aerosol generating devices, and more specifically, relates to a heating element, a heating element assembly, and an aerosol generating device. Background Technology

[0002] Aerosol generating devices heat the aerosol generating matrix to produce aerosols that can be inhaled by users. However, in related technologies, the heating element and the power supply wiring suffer from poor connection strength and susceptibility to corrosion, ultimately leading to low reliability of the heating element, making it prone to open circuits and failures, and negatively impacting the user experience to some extent. Utility Model Content

[0003] This application provides a heating element, a heating element assembly, and an aerosol generating device, aiming to improve the technical problem of low reliability of heating elements in related technologies.

[0004] To achieve the above objectives, in a first aspect, embodiments of this application provide a heating element, including a heating element, a lead wire, and an insulating substrate. The heating element is configured to generate heat when energized. One end of the lead wire is electrically connected to the heating element, and the other end is used to connect to an external circuit. The insulating substrate is connected to the heating element and at least covers the end of the lead wire connected to the heating element.

[0005] In the heating element provided in this application embodiment, the portion where the lead wire connects to the heating element can be covered by an insulating substrate. This effectively improves the strength of the connection between the lead wire and the heating element, reducing the possibility of the lead wire detaching from the heating element due to external force. Furthermore, the insulating substrate provides better protection for the end of the lead wire connected to the heating element, isolating the connection point from the external environment. This prevents aerosol-generating matrix from contacting and corroding the connection point, further reducing the risk of open-circuit failure in the heating element and helping to improve its reliability and durability.

[0006] Optionally, the insulating substrate is provided with a receiving cavity, and the heating element is disposed in the insulating substrate and arranged around the receiving cavity; The cavity is used to contain the aerosol generation matrix.

[0007] Optionally, in a direction perpendicular to the longitudinal direction of the insulating substrate, the insulating substrate has a first sidewall and a second sidewall disposed opposite to each other, the second sidewall being located on the side of the first sidewall facing away from the receiving cavity, and the heating element being located between the first sidewall and the second sidewall; The distance between the heating element and the first sidewall is less than the distance between the heating element and the second sidewall.

[0008] Optionally, the heating element extends longitudinally spirally along the insulating substrate and includes a plurality of sequentially connected annular segments.

[0009] Optionally, the pitch between at least two adjacent annular segments is unequal.

[0010] Optionally, the pitch between at least two adjacent annular segments is equal.

[0011] Optionally, along the longitudinal direction of the insulating substrate, the pitch between multiple adjacent annular segments varies according to a preset rule, which includes one of the following: At least some of the pitches increase sequentially; At least some of the pitches decrease sequentially; At least part of the pitch alternately increases and decreases.

[0012] Optionally, the cross-section of the annular segment has a first length in the longitudinal direction of the insulating substrate and a second length in a direction perpendicular to the longitudinal direction of the insulating substrate, wherein the first length is greater than or equal to the second length.

[0013] Optionally, the cross-sectional shape of the annular segment includes at least one of a circle, an ellipse, and a rectangle.

[0014] Optionally, the heating element further includes a temperature measuring element connected to the insulating substrate.

[0015] Optionally, the heating element includes a first heating unit and a second heating unit, the first heating unit and the second heating unit being arranged sequentially along the longitudinal direction of the insulating substrate, and either the first heating unit or the second heating unit includes at least one of the annular segments; Wherein, the temperature coefficient of resistance of the first heating unit is a first coefficient, and the temperature coefficient of resistance of the second heating unit is a second coefficient, and the first coefficient and the second coefficient are different.

[0016] Optionally, at least one of the first heating unit and the second heating unit is a split structure.

[0017] Optionally, the first heating unit and the second heating unit are integrally formed.

[0018] Optionally, the lead wire includes a first lead wire, a second lead wire, and a third lead wire arranged longitudinally and spaced apart along the insulating substrate. The first lead wire is connected to the end of the first heating unit away from the second heating unit, the second lead wire is connected to the end of the second heating unit away from the first heating unit, and the third lead wire is connected to the connection between the first heating unit and the second heating unit.

[0019] Optionally, the first heating unit and the second heating unit are arranged at intervals.

[0020] Optionally, the leads include a first power supply lead group and a second power supply lead group, wherein the first power supply lead group is connected to the first heating unit to form an independent power supply circuit, and the second power supply lead group is connected to the second heating unit to form an independent power supply circuit.

[0021] Optionally, the heating element includes a first heating line and a second heating line connected together, the first heating line extending circumferentially along the insulating substrate, and the second heating line extending longitudinally along the insulating substrate; Wherein, any two adjacent first heating traces are spaced apart, and any two adjacent second heating traces are spaced apart.

[0022] Optionally, the porosity of the insulating matrix is ​​less than 20%.

[0023] In a second aspect, embodiments of this application provide a heating element assembly, including a mounting housing and a heating element as described in any of the preceding claims, wherein the heating element is confined within the mounting housing.

[0024] The heating element assembly has all the beneficial effects of the aforementioned heating elements.

[0025] In a third aspect, embodiments of this application provide an aerosol generating apparatus, including the heating element described in any of the above claims, or including the heating element assembly described in the above claims.

[0026] Compared with the prior art, this application includes at least the following beneficial effects: The heating element provided in this application embodiment can improve the strength of the connection between the lead wire and the heating element through an insulating substrate, and help improve the corrosion resistance at that point, ultimately achieving the goal of improving the reliability of the heating element. In addition, this heating element can control the energization and heating of different parts of the heating element through different lead wires, achieving a more flexible heating effect, thereby flexibly adjusting the amount of aerosol generated, and ultimately improving the user experience.

[0027] The aerosol generating apparatus provided in this application includes the beneficial effects of any one or more of the above-mentioned heating elements and heating body components, which will not be repeated here. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a heating element provided in one embodiment of this application; Figure 2 for Figure 1 A schematic diagram showing the fit between the heating element, leads, and insulating substrate; Figure 3 for Figure 1 A schematic diagram of a certain cross-sectional structure; Figure 4 for Figure 3 Enlarged view of the structure of region A in the middle; Figure 5 for Figure 1 Another cross-sectional structural diagram; Figure 6 for Figure 5 Enlarged view of the structure of region B in the middle; Figure 7 for Figure 1 Another cross-sectional structural diagram; Figure 8 A schematic diagram of the heating element in a heating element provided in another embodiment of this application; Figure 9 This is a schematic diagram of the structure of a heating element provided in another embodiment of this application; Figure 10 for Figure 9 A schematic diagram showing the fit between the heating element, leads, and insulating substrate; Figure 11 This is a schematic diagram of the structure of the heating element assembly provided in the embodiments of this application; Figure 12 for Figure 11 A schematic diagram of the cross-sectional structure; Figure 13 This is a schematic diagram illustrating the use of the aerosol generating apparatus provided in the embodiments of this application; Figure 14 for Figure 13 A schematic diagram of the cross-sectional structure.

[0030] The following are the labeling elements in the figure: 10. Heating element; 20. Mounting housing; 210. First housing; 220. Second housing; 100. Heating element assembly; 200. Aerosol generating matrix; 1000. Aerosol generating device; 1. Insulating substrate; 101. Receiving cavity; 102. First sidewall; 103. Second sidewall; 2. Heating element; 201. Annular segment; 202. Preset fixed position; 21. First heating unit; 22. Second heating unit; 23. First heating wiring; 24. Second heating wiring; 3. Lead wire; 31. First lead wire; 32. Second lead wire; 33. Third lead wire; 310. First power supply lead wire group; 320. Second power supply lead wire group; 4. Temperature measuring element. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] In related technologies, aerosol generating devices can generate aerosols by heating an aerosol generating matrix. It is understood that the key component of an aerosol generating device for generating aerosols is the heating element. The heating element not only contains and confines the aerosol generating matrix to be heated, but also, under energized conditions, provides heat to the aerosol generating matrix confined within it, enabling the matrix to atomize and generate aerosols. A receiving cavity is formed within the heating element to accommodate the aerosol generating matrix.

[0039] Heating elements can be connected to external circuits via leads to achieve power supply. In related technologies, the heating element and the leads are connected by methods such as soldering. Due to the small area of ​​the soldered area, the connection is relatively weak. When the leads are pulled by external force, they are prone to detaching from the heating element, resulting in a poor circuit break in the heating element. Furthermore, the solder joint between the leads and the heating element is susceptible to corrosion from aerosols, which can lead to a risk of failure at the solder joint. All of these factors affect the reliability and lifespan of the heating element, and to some extent, impact the user experience.

[0040] To address the aforementioned issues and improve the low reliability of heating elements, this application provides a heating element, a heating element assembly, and an aerosol generating device. The heating element can improve the reliability of the aerosol generating device by structural improvements, and can also help extend the service life of the heating element to a certain extent, ultimately improving the user experience.

[0041] It should be noted that the aerosol generating matrix can generate aerosols under heating conditions, and the aerosols may contain volatile compounds. The aerosol generating matrix can be, but is not limited to, materials used for medical, health, and cosmetic purposes. For example, the aerosol generating matrix can be plant-based materials, such as plant roots, stems, leaves, flowers, buds, and seeds. Those skilled in the art should understand that the structure of the aerosol generating matrix can refer to existing structures in related technologies, and the assembly structure and shape of the components in the aerosol generating device can refer to existing structures in related technologies; further detailed descriptions are not provided in this application.

[0042] In the embodiments of this application, the aerosol generating matrix can be a solid matrix or a liquid matrix. Taking a solid matrix as an example, those skilled in the art will understand that the aerosol generating matrix can be a solid structure made of solid materials, or a cotton structure that has adsorbed a certain amount of liquid materials and is in a wetted state.

[0043] Figure 1 This is a schematic diagram of the structure of the heating element 10 provided in a certain embodiment of this application. Figure 2 This is a schematic diagram showing the assembly of the heating element 2, lead wire 3, and insulating substrate 1 in a heating element 10 according to a certain embodiment of this application. Figure 3 for Figure 1 A schematic diagram of a certain cross-sectional structure. Figure 4 for Figure 3 Enlarged view of the structure of region A in the middle.

[0044] Please see Figures 1-4This application provides a heating element 10, which includes an insulating substrate 1, a heating element 2, and a lead wire 3. The heating element 2 is configured to generate heat when energized. The lead wire 3 is connected to the heating element 2 and is used to connect the heating element 2 to an external circuit. The insulating substrate 1 is connected to the heating element 2 and at least covers one end of the lead wire 3 connected to the heating element 2. The lead wire 3 is generally a strip or wire structure, with one end connected to the heating element 2 and the other end located outside the insulating substrate 1.

[0045] In this embodiment, the insulating substrate 1 is an insulating structure used to fix the heating element 2 and the aerosol generating matrix 200. The insulating substrate 1 can cover part of the surface of the heating element 2, or it can cover and wrap the entire surface of the heating element 2.

[0046] Please see Figure 1 and Figure 2 The insulating substrate 1 can wrap around and cover the entire surface of the heating element 2, at which point the entire heating element 2 is embedded within the insulating substrate 1. The end of the lead wire 3 connected to the heating element 2 is also located within the insulating substrate 1 and is covered and wrapped by it. Under the covering and wrapping effect of the insulating substrate 1, the portion of the lead wire 3 connected to the heating element 2 is effectively reinforced, thereby reducing the possibility of the lead wire 3 detaching from the heating element 2 due to external pulling. This effectively improves the connection strength between the heating element 2 and the lead wire 3, and helps improve the reliability of the heating element 10, reducing the possibility of short-circuit failure due to the lead wire 3 detaching from the heating element 2. In addition, the insulating substrate 1 can also provide better protection for the end of the lead 3 connected to the heating element 2, so that the connection between the lead 3 and the heating element 2 can be isolated from the external environment, thereby preventing the aerosol generation matrix 200 and the generated aerosol from directly contacting and corroding the connection between the lead 3 and the heating element 2, thereby further reducing the risk of open circuit failure of the heating element and helping to improve the reliability and durability of the heating element.

[0047] In some embodiments, the insulating substrate 1 is provided with a receiving cavity 101 for accommodating the aerosol generating matrix 200, and the heating element 2 is disposed in the insulating substrate 1 and surrounds the receiving cavity 101.

[0048] Specifically, the insulating substrate 1 includes a tubular structure that encloses and forms the aforementioned receiving cavity 101. The tubular structure also includes a first sidewall 102 and a second sidewall 103, wherein the first sidewall 102 is the inner peripheral wall of the tubular structure and the second sidewall 103 is the outer peripheral wall of the tubular structure. The aforementioned heating element 2 can be disposed on the first sidewall 102 of the insulating substrate 1, or on the second sidewall 103 of the insulating substrate 1, or between the first sidewall 102 and the second sidewall 103 of the insulating substrate 1.

[0049] Please see Figure 2 and Figure 3The heating element 2 is located between the first sidewall 102 and the second sidewall 103 of the insulating substrate 1.

[0050] Specifically, the heating element 2 is completely enclosed by the insulating substrate 1. In addition to the first sidewall 102 and the second sidewall 103, the outer surface of the insulating substrate 1 also has two end faces in the longitudinal direction. No part of the heating element 2 extends beyond either outer surface of the insulating substrate 1, that is, the heating element 2 will not be exposed from the outer peripheral surface or the two end faces in the longitudinal direction of the insulating substrate 1.

[0051] It should be noted that no part of the heating element 2 extends beyond any outer surface of the insulating substrate 1. This can be understood as any part of the heating element 2 not exceeding the outer boundary of the insulating substrate 1 in spatial position. In this case, no surface of the heating element 2 is exposed relative to the insulating substrate 1. One end of the lead wire 3 passes through the insulating substrate 1 and is connected to the heating element 2 located within the insulating substrate 1, while the other end passes through the insulating substrate 1 and extends outwards. This structure not only limits and supports the heating element 2, preventing deformation during use, but also helps prevent the heating element 2 from directly contacting the aerosol generating matrix 200, thus protecting the heating element 2 from damage caused by the aerosol generating matrix 200 or the aerosol itself.

[0052] It should be noted that, for example, the distance between the heating element 2 and the first sidewall 102 may be exactly zero, such as when the heating element 2 is exactly tangent to the first sidewall 102. In this case, the tangent line between the heating element 2 and the first sidewall 102 is not covered by the first sidewall 102, while other parts of the heating element 2 are wrapped and covered by the insulating substrate 1; or, the surface of the heating element 2 facing the receiving cavity 101 may be exactly on the same plane as the first sidewall 102, while other parts of the heating element 2 are covered and wrapped by the insulating substrate 1. In this embodiment, all of the above situations can be regarded as the heating element 2 being completely covered by the insulating substrate 1. Of course, considering manufacturing errors, the above situations generally will not occur.

[0053] by Figure 1 Taking the structure shown as an example, the insulating substrate 1 is a hollow cylindrical structure. The arrow in the figure points in the direction of the length of the insulating substrate 1, that is, the longitudinal direction of the insulating substrate 1. For ease of description, the lead wire 3 can be connected to the heating element 2 by soldering, and the connection point between the two is a solder pad.

[0054] When the pads are not covered and wrapped by the insulating substrate 1, the lead 3 twists under the pull of an external force, transmitting the force to the pads. If the external force is too great, the pads may detach from the heating element 2, causing the heating element 2 to disconnect from the external circuit, resulting in a poor open circuit. In this embodiment, the insulating substrate 1 can cover and wrap the pads, providing better protection and reinforcement. The pads have a certain protrusion relative to the heating element 2, which is covered by the insulating substrate 1 and not exposed relative to it. The external force acting on the lead 3 can only be transmitted to the position where the lead 3 connects to the insulating substrate 1. The pads covered and wrapped by the insulating substrate 1 are not subject to external pulling, thus effectively reducing the risk of pad detachment.

[0055] In addition, the insulating substrate 1 can also isolate the pads from the external environment. The aerosol generated when the heating element is working is difficult to directly contact the pads, avoiding the pads from being broken due to aerosol corrosion, which further helps to improve the reliability and durability of the heating element.

[0056] The insulating substrate 1 covers and wraps the heating element 2, which can also provide better protection for the heating element 2.

[0057] In this embodiment, the heating element 2 can be combined with the insulating substrate 1 through an insert injection molding process. At this time, the insulating substrate 1 can cover the outer surface of the heating element 2 to isolate the heating element 2 from the external environment. It should be noted that at this time, the heating element 2 can be completely covered by the insulating substrate 1 with no exposed outer surface.

[0058] The above structure can prevent oxidation of the heating element 2 without affecting the insulation function of the insulating substrate 1. At the same time, it can also prevent sulfur-containing gases and other corrosive gases in the external environment from directly contacting the heating element 2 and causing damage to the heating element 2.

[0059] In this embodiment, the insulating substrate 1 can be composed of a dense insulating material prepared by sintering. For example, the material used for the insulating substrate 1 can include a high-temperature resistant insulating material, which includes at least one of a ceramic material and a glass material, wherein the ceramic material includes at least one of silicon dioxide and zirconium oxide. The above-mentioned material can form a dense insulating structure after high-temperature sintering and has high strength and supporting properties, effectively encapsulating and covering the heating element 2, and achieving insulating coverage of the heating element 2.

[0060] It should be noted that in some embodiments, the porosity of the insulating substrate 1 is less than 20%.

[0061] Porosity refers to the proportion of the total area of ​​pores (including pits, open pores, etc.) formed on the surface layer of the insulating substrate 1 (typically the surface layer exposed to the external environment) to the surface area of ​​the insulating substrate 1. This limitation ensures that the insulating substrate 1 has a relatively dense structure, possessing good airtightness and liquid tightness. It effectively prevents gas or liquid from penetrating through the insulating substrate 1 and contacting the heating element 2 embedded within it, thus providing better sealing and protection for the heating element 2, especially providing better coverage and protection at the connection between the heating element 2 and the lead wire 3, preventing corrosion at that point. Furthermore, this structure also gives the insulating substrate 1 better strength and relatively better wear resistance, making the heating element 10 with this insulating substrate 1 more reliable and durable.

[0062] Specifically, in this embodiment, the porosity of the insulating substrate 1 can be controlled within 5%. For example, the porosity of the insulating substrate 1 can be 1%, 2%, 3%, 4%, 5%, etc.

[0063] The porosity described above can be determined by the liquid displacement method in ISO 18754:2020.

[0064] Please see Figure 1 There are multiple leads 3. The multiple leads 3 can be arranged at intervals along the longitudinal direction of the insulating substrate 1 or at intervals along the circumferential direction of the insulating substrate 1, as long as it is ensured that adjacent leads 3 do not directly contact each other and cause a short circuit.

[0065] In this embodiment, the cross-section of the insulating substrate 1 in the longitudinal direction can be annular, rectangular, elliptical, or other similar shapes. This embodiment does not limit the cross-sectional shape of the insulating substrate 1 in the longitudinal direction; it is only necessary to ensure that the receiving cavity 101 formed by the insulating substrate 1 can meet the placement and positioning of the aerosol generating matrix 200. For ease of description, the following description uses the insulating substrate 1 as an example, which is a cylindrical structure, to illustrate the structure of the insulating substrate 1 and the heating element 2 disposed within the insulating substrate 1.

[0066] Please see Figure 1 and Figure 2 The insulating substrate 1 is a hollow cylindrical structure, and its longitudinal direction is the axial direction of the insulating substrate 1. Multiple (three) leads 3 are spaced apart along the longitudinal direction of the insulating substrate 1. The heating element 2 is located inside the insulating substrate 1 and surrounds the receiving cavity 101.

[0067] Please see Figure 2 and Figure 3 The heating element 2 includes a first heating unit 21 and a second heating unit 22, which are arranged sequentially along the longitudinal direction of the insulating substrate 1. The first heating unit 21 is located above the second heating unit 22.

[0068] Specifically, the first heating unit 21 and the second heating unit 22 are integrally formed to constitute the heating element 2, and both are coil-shaped structures. The axis of the coil-shaped structure coincides with the axis of the receiving cavity 101 on the insulating substrate 1.

[0069] In some embodiments, the coil-like structure may be formed by spirally winding wires.

[0070] The lead 3 includes a first lead 31, a second lead 32, and a third lead 33. The first lead 31 and the second lead 32 are connected to the two ends of the heating element 2 along the longitudinal direction of the insulating substrate 1, respectively, and the third lead 33 is connected to the middle of the heating element 2 along the longitudinal direction of the insulating substrate 1. Three preset fixed positions 202 are spaced apart on the heating element 2. The first lead 31, the second lead 32, and the third lead 33 are connected to these three preset fixed positions 202, respectively, to achieve circuit conduction when the first lead 31 and the third lead 33 are simultaneously connected to an external circuit. That is, the first lead 31 and the third lead 33 are connected to the two ends of the first heating unit 21 along the axial direction, and the second lead 32 and the third lead 33 are connected to the two ends of the second heating unit 22 along the axial direction, to achieve circuit conduction when the second lead 32 and the third lead 33 are simultaneously connected to an external circuit. When both the first lead 31 and the second lead 32 are connected to an external circuit, both the first heating unit 21 and the second heating unit 22 can achieve circuit conduction.

[0071] In this embodiment, different leads 3 can be connected to an external circuit to control at least one of the first heating unit 21 and the second heating unit 22 to be in a powered heating state. The above control method and circuit connection structure have been disclosed in related technologies and will not be repeated here.

[0072] It should be noted that the third lead 33 can be connected to the connection point of the first heating unit 21 and the second heating unit 22. This connection point can be considered as the point of common coupling (PCC) of the first heating unit 21 and the second heating unit 22. In a circuit, a common coupling point refers to a physical connection point shared by two or more electrical components, where current converges or diverges. Since the first heating unit 21 and the second heating unit 22 are integrally formed, the aforementioned common coupling point is the connection end of the first heating unit 21 and the second heating unit 22. For example, the first heating unit 21 and the second heating unit 22 can be welded together, in which case the common coupling point is the welding point; or, the position where the third lead 33 is connected can be considered as the common coupling point of the first heating unit 21 and the second heating unit 22, in which case the third lead 33 can be welded to the heating element.

[0073] Since the heating element 2 is embedded in the insulating substrate 1, one end of any of the first lead 31, the second lead 32 and the third lead 33 connected to the heating element 2 is also embedded in the insulating substrate 1, and the other end extends through the outer wall of the insulating substrate 1 along the radial direction of the insulating substrate 1.

[0074] In some embodiments, the heating element 2 extends spirally along the longitudinal direction of the insulating substrate 1 and includes a plurality of sequentially connected annular segments 201. It should be noted that, along the axial direction of the insulating substrate 1, the projected outline of any annular segment 201 can be a complete ring or an arc-shaped structure with a certain angle. This embodiment does not limit the annular segment 201 to necessarily being a complete ring structure.

[0075] Please see Figure 2 and Figure 3 At this time, either the first heating unit 21 or the second heating unit 22, which is spirally wound along the longitudinal / axial direction of the insulating substrate 1, includes at least one annular segment 201. The plurality of annular segments 201 constituting the heating element 2 are arranged sequentially along the longitudinal direction of the insulating substrate 1 and are all disposed within the insulating substrate 1 and surround the receiving cavity 101.

[0076] Please see Figure 3 and Figure 4 Along the longitudinal direction of the insulating substrate 1, the pitch between any two adjacent annular segments 201 is greater than zero.

[0077] Specifically, along the longitudinal direction of the insulating substrate 1, there is a certain pitch between any two adjacent annular segments 201 in the first heating unit 21, and this pitch is greater than zero. Similarly, there is a certain pitch between any two adjacent annular segments 201 in the second heating unit 22, and this pitch is greater than zero.

[0078] It should be noted that any two adjacent annular segments 201 are spaced apart in the longitudinal or radial direction of the insulating substrate 1. For example, two annular segments 201 that belong to the first heating unit 21 and the second heating unit 22 and are adjacent in the longitudinal direction of the insulating substrate 1 may have a pitch greater than zero in the longitudinal direction of the insulating substrate 1, or a spacing greater than zero in the radial direction of the insulating substrate 1.

[0079] Two adjacent annular segments 201 may both belong to the first heating unit 21 or the second heating unit 22, or they may belong to the first heating unit 21 and the second heating unit 22 respectively. This embodiment does not limit them.

[0080] In some embodiments, at least two of the annular segments 201 constituting the first heating unit 21 have different or the same pitch, and / or at least two of the annular segments 201 constituting the second heating unit 22 have different or the same pitch.

[0081] For example, the pitch of multiple annular segments 201 can be set to be consistent.

[0082] The following is based on Figure 3 and Figure 4 Taking the structure shown as an example, the pitch variation of the annular segment 201 will be explained.

[0083] Please see Figure 3 and Figure 4 At this time, the first heating unit 21 and the second heating unit 22 are integrally formed to constitute the heating element 2. The heating element 2 includes multiple annular segments 201 spaced apart along the axial direction. The annular segments 201 are evenly arranged along the axial direction, and the pitch d between any two adjacent annular segments 201 is consistent or substantially consistent. For the heating element 2, the heating effect of the heating element 2 at all positions in the axial direction is consistent at this time.

[0084] exist Figure 4 In the diagram, two pitches, both d, are marked between different annular segments 201, and both pitches have the same size.

[0085] This structure can, to some extent, improve the heat difference provided by the heating element 2 at various positions in the longitudinal direction of the insulating substrate 1, so that the heating element 10 can achieve a basically consistent or nearly consistent heating effect at different positions in the longitudinal direction of the insulating substrate 1.

[0086] It should be noted that, in Figure 3 and Figure 4 In this case, the surface of the heating element 2 facing the cavity 101 is on the same surface as the first sidewall 102 of the insulating substrate 1.

[0087] Figure 5 for Figure 1 Another cross-sectional structural diagram, Figure 6 for Figure 5 Enlarged view of the structure of region B in the middle.

[0088] Please see Figure 5 and Figure 6 There is a distance greater than zero between the heating element 2 embedded in the insulating substrate 1 and the first sidewall 102, and this distance is less than the distance between the heating element 2 and the second sidewall 103.

[0089] Specifically, the pitch between the first heating unit 21 and the second heating unit 22 constituting the heating element 2 and the first sidewall 102 is consistent.

[0090] The heat generated by the heating element 2 embedded in the insulating substrate 1 under energized conditions is first directly conducted to the insulating substrate 1, and then the insulating substrate 1 heats the aerosol generating matrix 200 confined within the receiving cavity 101. During this process, most of the heat conducted to the insulating substrate 1 acts on the aerosol generating matrix 200 through the first sidewall 102, while a small portion dissipates outward through the second sidewall 103. With the radial dimension of the insulating substrate 1 remaining constant, as the distance between the heating element 2 and the first sidewall 102 increases, the distance between the heating element 2 and the second sidewall 103 gradually decreases; conversely, as the distance between the heating element 2 and the first sidewall 102 decreases, the distance between the heating element 2 and the second sidewall 103 gradually increases. When the distance between the heating element 2 and the second sidewall 103 is too small, a relatively large amount of heat will be conducted out of the insulating substrate 1 through the second sidewall 103, thus affecting the heating efficiency of the aerosol generating matrix 200. Similarly, when the distance between the heating element 2 and the second side wall 103 is small, more of the heat generated by the heating element 2 can be transferred to the second side wall 103, thereby improving the heating efficiency of the heating element 2.

[0091] Specifically, the distance between the heating element 2 and the first sidewall 102 is generally set to be less than or equal to 900 μm. For example, the distance between the heating element 2 and the first sidewall 102 can be any value among 10 μm, 100 μm, 200 μm, 300 μm, 400 μm, 450 μm, 520 μm, 580 μm, 640 μm, 702 μm, 758 μm, 806 μm, 863 μm, and 900 μm. This embodiment does not limit the actual value of the above distance; it only needs to ensure that the heating element 2 maintains a small distance from the first sidewall 102.

[0092] In some embodiments, please refer to Figure 6 The cross section of the aforementioned annular segment 201 has a first length L1 in the longitudinal direction of the insulating substrate 1 and a second length L2 in the radial direction of the insulating substrate 1 (i.e., the direction perpendicular to the longitudinal direction of the insulating substrate 1 in the figure). The first length L1 is greater than or equal to the second length L2.

[0093] In this embodiment, the cross-section of the annular segment 201 refers to the cross-section of the conductor that encloses and forms the heating element 2. The cross-section of the annular segment 201 is parallel to the spiral extension direction of the annular segment 201. When the longitudinal section of the insulating substrate 1 is rectangular or other structures, the direction perpendicular to the longitudinal direction of the insulating substrate 1 can refer to the wall thickness direction of the insulating substrate 1, that is, the direction from the first sidewall 102 to the second sidewall 103 in the figure.

[0094] By setting the first length L1 of the cross-section of the annular segment 201 to be greater than or equal to the second length L2, it helps to increase the proportion of the projected area of ​​the annular segment 201 facing the first sidewall 102 of the insulating substrate 1 to the surface area of ​​the first sidewall 102. Without changing the cross-sectional dimensions, this structure can increase the heat-conducting area of ​​the heating element 2, especially the heat-conducting area facing the first sidewall 102, thereby giving the heating element 2 higher heat dissipation efficiency. Figure 6 As shown, the cross-section of the annularity 201 is a flat rectangular structure.

[0095] Specifically, the first length L1 of the cross-section of the annular segment 201 can be set to be equal to the second length L2. In this case, the cross-sectional shape of the annular segment 201 can include at least one of a circle, a square, a rounded rectangle, and other similar regular or irregular shapes. Alternatively, the first length L1 of the cross-section of the annular segment 201 can be set to be greater than the second length L2. In this case, the cross-sectional shape of the annular segment 201 can include at least one of an ellipse, a rectangle, a triangle, and other similar regular or irregular shapes.

[0096] It should be noted that the shape and size of the cross-section of the annular segment 201 used to form the first heating unit 21 at different positions can be the same or different; similarly, the shape and size of the cross-section of the annular segment 201 used to form the second heating unit 22 at different positions can be the same or different, and this embodiment does not limit them.

[0097] Figure 7 for Figure 1 Another cross-sectional structural diagram.

[0098] In some embodiments, the heating element 10 further includes a temperature sensing element 4, which is in contact with the insulating substrate 1 and is used to detect the temperature of the insulating substrate 1.

[0099] Please see Figure 7 The temperature sensing element 4 can be embedded in the insulating substrate 1 to detect the temperature inside the insulating substrate 1.

[0100] Specifically, along the longitudinal direction of the insulating substrate 1, the temperature measuring element 4 can be arranged at intervals relative to the middle of the heating element 2 and the annular segment 201 constituting the heating element 2.

[0101] Since the heating element 2 directly heats the insulating substrate 1, the temperature measuring element 4 is placed in... Figure 7 The position shown helps improve the accuracy of temperature detection of the insulating substrate 1 and the heating element 2 by the temperature measuring element 4.

[0102] Of course, in other similar embodiments, the temperature measuring element 4 can be configured to contact the outer wall of the insulating substrate 1 (e.g., one of the first side wall 102 and the second side wall 103, or one end face of the insulating substrate 1 in the longitudinal direction) according to design requirements, so as to realize the detection of the temperature of the insulating substrate 1.

[0103] In other similar embodiments, the temperature of the heating element 2 can be obtained without setting the temperature measuring element 4.

[0104] Specifically, the heating element 2 can be made of a material with a temperature coefficient of resistance greater than or equal to a preset value. The preset temperature coefficient of resistance can be adjusted adaptively according to design needs, as long as it ensures that the material used to constitute the heating element 2 has self-regulating temperature characteristics. This embodiment does not limit the actual range of the preset temperature coefficient of resistance. In this case, the heating element 2 is made of a self-regulating conductive material, exhibiting good self-regulating temperature characteristics.

[0105] Materials with a temperature coefficient of resistance (TCR) are those whose resistance changes systematically with temperature. These materials possess self-regulating temperature characteristics. Without the temperature sensing element 4, the temperature of the heating element 2 can be obtained by reading its resistance, which helps to achieve precise temperature control of the heating element 2.

[0106] When the heating element 2 is energized, its resistance changes with temperature. When the temperature is low, the resistance is low, and the current flowing through the heating element 2 is relatively large. As the temperature gradually increases, the resistance of the heating element 2 gradually increases, limiting the power output, thereby achieving self-temperature control. In addition, the relevant control module connected to the heating element 10 can obtain the actual temperature of the heating element 2 by reading its resistance value, thereby controlling the operating state of the heating element 2.

[0107] The aforementioned control module may be a circuit board or other structure disclosed in the relevant art. Its working principle and connection method with the first heating unit 21 have been disclosed in the relevant art and will not be repeated here.

[0108] In some embodiments, both the first heating unit 21 and the second heating unit 22 can be made of a material with a certain temperature coefficient of resistance. In this case, the temperature coefficient of resistance of the first heating unit 21 is a first coefficient, and the temperature coefficient of resistance of the second heating unit 22 is a second coefficient. It should be noted that the first coefficient and the second coefficient can be the same or different, and their specific settings can be adaptively adjusted according to the heating requirements.

[0109] Of course, when the first coefficient and the second coefficient are the same, the first heating unit 21 and the second heating unit 22 can be a separate structure or an integral structure.

[0110] In some embodiments, the pitch between adjacent annular segments 201 can vary according to a preset pattern along the longitudinal direction of the insulating substrate 1.

[0111] Specifically, the preset rules include one of the following: at least some of the pitch increases sequentially, resulting in a distribution of annular segments 201 that is initially dense and then sparse; at least some of the pitch decreases sequentially, resulting in a distribution of annular segments 201 that is initially sparse and then dense; at least some of the pitch alternates between increasing and decreasing, resulting in an alternating distribution of annular segments 201 with varying density. In the embodiments of this application, the pitch formed between two adjacent annular segments 201 can be set to increase or decrease sequentially along the longitudinal direction (i.e., axial direction) of the insulating substrate 1; or, the pitch formed between two adjacent annular segments 201 can be arranged along the longitudinal direction of the insulating substrate 1 in any pattern of initially dense and then sparse, initially sparse and then dense, or alternating between dense and sparse; or, the annular segments 201 can be arranged irregularly, in which case the pitch size change between two adjacent annular segments 201 is also irregular.

[0112] In the embodiments of this application, by adjusting the number and distribution density of the annular segments 201 that constitute the first heating unit 21 and the second heating unit 22 respectively, different heating effects can be achieved in the longitudinal direction of the insulating substrate 1. This allows for adjusting the heating temperature of different positions of the aerosol generating matrix 200 as needed, or adjusting the heating temperature of different positions of the aerosol generating matrix 200 to be similar as needed, in order to meet the designed heating effect and ultimately improve the taste and release amount of the generated aerosol.

[0113] Please see Figure 7 Along the axial direction of the insulating substrate 1, the annular segment 201 constituting the heating element 2 has a gradually changing density layout with a denser center and sparser ends.

[0114] In other similar embodiments, the heating element 2 may also be a non-spiral structure wound around the insulating substrate 1 in the circumferential direction.

[0115] For example, please see Figure 8 , Figure 8 This is a schematic diagram of the heating element 2 in the heating element 10 provided in another embodiment of this application.

[0116] The heating element 2 includes a first heating line 23 and a second heating line 24 connected together. The first heating line 23 extends circumferentially along the insulating substrate 1, and the second heating line 24 extends axially along the insulating substrate 1. Any two adjacent first heating lines 23 are spaced apart, and any two adjacent second heating lines 24 are spaced apart.

[0117] Please see Figure 8 The first heating line 23 and the second heating line 24 are connected in sequence to form a continuous heating element 2. At this time, the first heating unit 21 and the second heating unit 22 are integrally formed.

[0118] The first heating trace 23 and the second heating trace 24 constituting the heating element 2 are an integral structure. They can be formed by bending metal wires in different directions, or by cutting or etching conductive metal sheets. This embodiment does not limit the structure and processing method of the first heating trace 23 and the second heating trace 24 constituting the heating element 2.

[0119] Of course, in other similar embodiments, the first heating unit 21 and the second heating unit 22 can also be arranged at intervals as needed.

[0120] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of the heating element 10 provided in another embodiment of this application. Figure 10 for Figure 9 A schematic diagram showing the assembly of the heating element 2, the lead wire 3, and the insulating substrate 1.

[0121] Compared with the heating element 10 described above, the heating element 2 in this embodiment includes a first heating unit 21 and a second heating unit 22 that are independent of each other. Correspondingly, the lead wire 3 also includes a first power supply lead wire group 310 and a second power supply lead wire group 320.

[0122] Please see Figure 9 and Figure 10 The first power supply lead group 310 is connected to the first heating unit 21 to form an independent power supply circuit, and the second power supply lead group 320 is connected to the second heating unit 22 to form an independent power supply circuit.

[0123] Specifically, both the first power supply lead group 310 and the second power supply lead group 320 include two wires. The two wires of the first power supply lead group 310 are used only to connect to the first heating unit 21 and form an independent power supply circuit for supplying power to the first heating unit 21. The two wires of the second power supply lead group 320 are used only to connect to the second heating unit 22 and form an independent power supply circuit for supplying power to the second heating unit 22.

[0124] It should be noted that both the first heating unit 21 and the second heating unit 22 described above are formed by spirally winding wires. In other similar embodiments, other structures can also be provided for either the first heating unit 21 or the second heating unit 22. For example, it can be a metal trace similar to a metal wire, which is prepared by processing a metal tube through patterning processes such as laser engraving or etching. This metal trace has a relatively complex trajectory and can have at least one of the following complex shapes: sawtooth, straight, serpentine, zigzag, S-shaped, and mesh-like, as long as it does not affect the realization of its heating function.

[0125] In all the above embodiments, at least one of the first heating unit 21 and the second heating unit 22 is a split structure along the longitudinal direction of the insulating substrate 1.

[0126] Taking the first heating unit 21 as an example, the first heating unit 21 can be an integral structure or a multi-segment structure. In this case, the first heating unit 21 located at different positions along the axial direction of the insulating substrate 1 can be started or stopped separately as needed to achieve different heating effects. Correspondingly, the second heating unit 22 can be an integral structure or a multi-segment structure. Multiple different second heating units 22 can be spaced apart along the axial direction of the insulating substrate 1, thereby realizing the separate control of the second heating units 22 located at different positions along the axial direction of the insulating substrate 1 to achieve different heating effects.

[0127] It is understood that the heating element 10 provided in this application embodiment can improve the strength of the connection between the lead wire 3 and the heating element 2 through the insulating substrate 1, and help improve the corrosion resistance at that point, ultimately achieving the purpose of improving the reliability of the heating element 10. In addition, the heating element 10 can control the energization and heating of different parts of the heating element 2 through different lead wires 3, which can achieve a more flexible heating effect, thereby flexibly adjusting the amount of aerosol generated, and ultimately improving the user experience.

[0128] The method for preparing the heating element 10 in this embodiment includes: Step S1: Obtain the connected heating element 2 and lead wire 3; Step S2: Obtain insulating material and coat the heating element 2 with the insulating material to obtain an insulating substrate 1 that is connected to the heating element 2 and the lead wire 3.

[0129] The insulating substrate 1, made of insulating material, can provide better coverage and protection for the connection between the heating element 2 and the lead wire 3, thereby improving the connection strength between the heating element 2 and the lead wire 3, avoiding faults such as wire breakage caused by the poor connection between the heating element 2 and the lead wire 3, which helps to improve the reliability of the heating element 10 and extend its service life.

[0130] Step S1, the step of acquiring the connected heating element 2 and lead wire 3, includes: Step S11: Obtain heating element 2 and lead wire 3. The surface of heating element 2 has preset fixed positions 202, and the number of preset fixed positions 202 is the same as the number of lead wires 3. Step S12: Fix one end of all the leads 3 to the heating element 2 through the preset fixed position 202 so as to connect them to the heating element 2.

[0131] The preset fixing position 202 in step S11 can be adaptively adjusted according to the structural design of the heating element 2 and the heating requirements. This preset fixing position 202 is used to fix the lead wire 3, and its structure is the same as or substantially the same as the structure of other areas on the heating element 2. In step S12, the lead wire 3 can be fixed to the preset fixing position 202 of the heating element 2 using metal connection methods disclosed in related technologies such as welding, to achieve electrical connection with the heating element 2. Multiple leads 3 are welded one by one to their corresponding preset fixing positions 202 to meet the connection requirements between the heating element 2 and external circuits.

[0132] In some embodiments, the insulating substrate 1 in step S2 can be prepared by insert injection molding.

[0133] Taking ceramic slurry as the insulating material as an example, when preparing the insulating substrate 1 using an insert injection molding process, it is necessary to first obtain a mold cavity for processing, as well as inserts and connected heating elements 2 and leads 3; then, place the connected heating elements 2 and leads 3 in the mold cavity, and place removable inserts at appropriate positions in the mold cavity (e.g., inside and / or outside), thereby forming a space in the mold cavity that meets the design requirements for accommodating the insulating material; then, inject ceramic slurry into the mold cavity, and remove the inserts after the ceramic slurry has formed. At this time, the connection between the heating elements 2 and leads 3 is covered and wrapped by the ceramic slurry; finally, the ceramic slurry and the heating elements 2 and leads 3 fixedly connected to the ceramic slurry are fired. After the formed ceramic slurry is sintered and solidified, the insulating substrate 1 integrally formed with the heating elements 2 and leads 3 can be obtained. An accommodating cavity 101 for accommodating the aerosol generation matrix 200 is formed on the insulating substrate 1.

[0134] Based on the same concept, in a second aspect, embodiments of this application also provide a heating element assembly 100, which includes the heating element 10 described above, and also includes a mounting housing 20. The heating element 10 is confined within the mounting housing 20.

[0135] Figure 11 This is a schematic diagram of the structure of the heating element assembly 100 provided in the embodiments of this application. Figure 12 for Figure 11 A cross-sectional structural diagram. Please refer to... Figure 11 and Figure 12 The heating element assembly 100 is a columnar structure, including a connected heating element 10 and a mounting shell 20, wherein the receiving cavity 101 of the heating element 10 is exposed relative to the mounting shell 20, so that the aerosol generating matrix 200 can be inserted into or removed from the receiving cavity 101 relative to the mounting shell 20.

[0136] Please see Figure 12 The mounting housing 20 includes a first housing 210 and a second housing 220 that are detachably connected. The first housing 210 is a hollow tubular structure. The second housing 220 can be inserted into and connected to the first housing 210 through one end in the axial direction to form a space for accommodating the heating element 10.

[0137] One end of the heating element 10 in the axial direction abuts against the first housing 210 (it can abut directly or through a structure such as a silicone sealing ring), and the other end abuts against the second housing 220 (it can abut directly or through a structure such as a silicone sealing ring), so as to be limited between the first housing 210 and the second housing 220.

[0138] When assembling the heating element assembly 100, the heating element 10 can be inserted into the first housing 210 in the direction indicated by the arrow, at which point the heating element 10 can achieve a limiting engagement with the first housing 210. Subsequently, the second housing 220 is inserted into the first housing 210 in the same direction and connected to the first housing 210 to limit the other end of the heating element 10 that is confined within the first housing 210. Alternatively, the sequence can be adjusted so that the heating element 10 is first connected to the second housing 220 for limiting engagement, and then the second housing 220 is inserted into the first housing 210 in the direction indicated by the arrow to achieve a limiting engagement between the second housing 220 and the first housing 210.

[0139] After the first housing 210 and the second housing 220 are assembled, the heating element 10 can be firmly fixed inside the mounting housing 20.

[0140] It should be noted that a through hole for the lead wire 3 to pass through is provided at the corresponding position of the second housing 220. Figure 11 (Not shown in the diagram). Lead 3 can extend relative to the mounting housing 20 through the aforementioned perforation to facilitate connection of lead 3 to external circuitry.

[0141] Based on the same concept, in a third aspect, embodiments of this application also provide an aerosol generating device 1000, which includes a heating element 10, and an aerosol generating matrix 200 can be inserted into the receiving cavity 101 of the heating element 10, and atomized under the heating action of the heating element 10 to generate aerosol.

[0142] Figure 13 This is a schematic diagram illustrating the use of the aerosol generating device 1000 provided in an embodiment of this application. Figure 14 for Figure 13 A cross-sectional structural diagram. Please refer to... Figures 13-14 The aerosol generating device 1000 is provided with a heating element 10, or with the heating element assembly 100 described above.

[0143] When using the aerosol generating device 1000, the user can insert one end of the aerosol generating matrix 200 (which has an overall cylindrical structure) into the aerosol generating device 1000 and bring it into contact with the heating element 10. When powered on, the heating element 10 heats up and heats the aerosol generating matrix 200, causing it to generate aerosols. The user can then draw in the generated aerosols through the end of the aerosol generating matrix 200 located outside the aerosol generating device 1000 while it is generating aerosols.

[0144] Please see Figure 13 and Figure 14 In this embodiment, the aerosol generating device 1000 heats a solid aerosol generating matrix 200 at low temperatures using a heating element 10, causing the corresponding components within the aerosol generating matrix 200 to atomize and form inhalable aerosols. When operating, this device can generate aerosols containing specific components without producing an open flame, facilitating inhalation by the user. Inhalation refers to the process of inhaling the aerosol into the user's mouth, nasal cavity, or lungs through the mouth or nose. This aerosol generating device 1000 generates aerosols through low-temperature heating rather than combustion, i.e., it utilizes heat-not-burn (HNB) technology to generate aerosols.

[0145] In some embodiments, the aerosol generating device 1000 is further provided with a battery assembly, which is electrically connected to the heating element 10 and is used to provide the heating element 10 with the electrical energy required for its operation.

[0146] Of course, the aerosol generating device 1000 may also include a housing, with the heating element 10 and battery assembly located inside the housing and arranged at intervals along the width or length of the housing, so that the heating element 10 and battery assembly can be arranged neatly and orderly inside the housing, making the internal structure of the aerosol generating device 1000 more compact, thereby helping to reduce the size of the aerosol generating device 1000, which can improve the user's grip to a certain extent and thus help improve the user's experience.

[0147] The specific structure of the heating element 10 can be found in the embodiments described above. Since the aerosol generating device 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of each of the above embodiments, and will not be described in detail here.

[0148] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0149] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heating element, characterized in that, include: The heating element is configured to heat up when powered on. One end of the lead wire is electrically connected to the heating element, and the other end is used to connect to an external circuit. An insulating substrate is connected to the heating element and at least covers one end of the lead connected to the heating element.

2. The heating element according to claim 1, characterized in that, The insulating substrate is provided with a receiving cavity, and the heating element is disposed in the insulating substrate and arranged around the receiving cavity; The cavity is used to contain the aerosol generation matrix.

3. The heating element according to claim 2, characterized in that, In a direction perpendicular to the longitudinal direction of the insulating substrate, the insulating substrate has a first sidewall and a second sidewall disposed opposite to each other, the second sidewall being located on the side of the first sidewall facing away from the receiving cavity, and the heating element being located between the first sidewall and the second sidewall. The distance between the heating element and the first sidewall is less than the distance between the heating element and the second sidewall.

4. The heating element according to claim 2, characterized in that, The heating element extends longitudinally spirally along the insulating substrate and includes multiple sequentially connected annular segments.

5. The heating element according to claim 4, characterized in that, The pitch between at least two adjacent annular segments is unequal; and / or, the pitch between at least two adjacent annular segments is equal.

6. The heating element according to claim 4, characterized in that, Along the longitudinal direction of the insulating substrate, the pitch between multiple adjacent annular segments varies according to a preset rule, which includes one of the following: At least some of the pitches increase sequentially; At least some of the pitches decrease sequentially; At least part of the pitch alternately increases and decreases.

7. The heating element according to claim 4, characterized in that, The cross-section of the annular segment has a first length in the longitudinal direction of the insulating substrate and a second length in a direction perpendicular to the longitudinal direction of the insulating substrate, wherein the first length is greater than or equal to the second length.

8. The heating element according to claim 7, characterized in that, The cross-sectional shape of the annular segment includes at least one of a circle, an ellipse, and a rectangle.

9. The heating element according to claim 4, characterized in that, The heating element also includes a temperature measuring element, which is connected to the insulating substrate.

10. The heating element according to claim 4, characterized in that, The heating element includes a first heating unit and a second heating unit, which are arranged sequentially along the longitudinal direction of the insulating substrate, and either the first heating unit or the second heating unit includes at least one of the annular segments; Wherein, the temperature coefficient of resistance of the first heating unit is a first coefficient, and the temperature coefficient of resistance of the second heating unit is a second coefficient, and the first coefficient and the second coefficient are different.

11. The heating element according to claim 10, characterized in that, At least one of the first heating unit and the second heating unit is a split structure.

12. The heating element according to claim 10, characterized in that, The first heating unit and the second heating unit are integrally formed.

13. The heating element according to claim 12, characterized in that, The lead wire includes a first lead wire, a second lead wire, and a third lead wire arranged longitudinally along the insulating substrate. The first lead wire is connected to the end of the first heating unit away from the second heating unit, the second lead wire is connected to the end of the second heating unit away from the first heating unit, and the third lead wire is connected to the connection between the first heating unit and the second heating unit.

14. The heating element according to claim 10, characterized in that, The first heating unit and the second heating unit are arranged at intervals.

15. The heating element according to claim 14, characterized in that, The leads include a first power supply lead group and a second power supply lead group. The first power supply lead group is connected to the first heating unit to form an independent power supply circuit, and the second power supply lead group is connected to the second heating unit to form an independent power supply circuit.

16. The heating element according to claim 2, characterized in that, The heating element includes a first heating line and a second heating line connected together. The first heating line extends circumferentially along the insulating substrate, and the second heating line extends longitudinally along the insulating substrate. Wherein, any two adjacent first heating traces are spaced apart, and any two adjacent second heating traces are spaced apart.

17. The heating element according to any one of claims 1-16, characterized in that, The porosity of the insulating matrix is ​​less than 20%.

18. A heating element assembly, characterized in that, It includes a mounting housing and a heating element as described in any one of claims 1-17, wherein the heating element is confined within the mounting housing.

19. An aerosol generating device, characterized in that, It includes the heating element according to any one of claims 1-17, or the heating element assembly according to claim 18.

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