Heating element, preparation method thereof and aerosol generating device

Abstract

The invention belongs to the technical field of aerosol generating devices, and provides a heating body, a preparation method thereof and an aerosol generating device.The preparation method of the heating body comprises the steps that a heating base body is obtained, and a base material pipe and an insulating pipe are fixedly connected to the heating base body in the radial direction of the heating base body; and performing graphical processing on the base material tube to obtain the heating circuit. The heating body comprises an insulating tube and a heating circuit, the insulating tube is provided with a containing cavity, and the containing cavity is used for containing at least part of the aerosol generating substrate; the heating circuit is fixedly connected to the inner side wall or the outer side wall of the insulating tube in the radial direction; wherein the heating circuit is used for generating heat under a power-on condition. According to the heating body preparation method provided by the invention, the technical problem of poor reliability of the heating body in related technologies can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of aerosol generating devices, and more specifically, relates to a heating element and a preparation method thereof, and an aerosol generating device. Background Art

[0002] The aerosol generating device is capable of heating the aerosol generating matrix and generating an aerosol. The heating element is a key component of the aerosol generating device. The heat generated by the heating element can act on the aerosol generating matrix, so that the aerosol generating matrix generates an aerosol that can be inhaled by the user in a heated state. In the related art, the heating element includes an insulating tube for accommodating the aerosol generating matrix, and a heating layer prepared on the wall of the insulating tube by a thick film process. This process is not only complicated to operate, but the prepared heating layer also has the defects of uneven thickness distribution and insufficient adhesion between the film layers, which to a certain extent affects the reliability and service life of the heating element, and ultimately affects the user experience. Summary of the Invention

[0003] The embodiments of the present application provide a heating element and a preparation method thereof, and an aerosol generating device, aiming to improve the technical problem of poor reliability of heating elements existing in the related art.

[0004] To achieve the above objectives, in a first aspect, an embodiment of the present application provides a method for preparing a heating element, comprising:

[0005] Obtaining a heating base body, wherein the heating base body has a base material tube and an insulating tube fixedly connected along its radial direction;

[0006] The substrate tube is patterned to obtain a heating circuit.

[0007] In the preparation method of the heating element provided in the embodiment of the present application, the insulating tube is fixedly connected to the substrate tube, and after the substrate tube is patterned, the heating circuit is fixed on the wall of the insulating tube, thereby effectively simplifying the preparation process of the heating element and reducing the processing difficulty of the heating element; at the same time, by first preparing the tubular substrate tube, it can help improve the uniformity of the thickness of the heating circuit prepared subsequently in different areas, thereby improving the reliability of the heating element.

[0008] Optionally, the step of patterning the substrate tube to obtain a heating circuit includes:

[0009] The substrate tube is subjected to laser engraving and / or etching.

[0010] Optionally, the step of obtaining a heat-generating substrate, wherein the heat-generating substrate includes a base material tube and an insulating tube fixedly connected along a radial direction thereof, comprises:

[0011] obtaining a substrate tube, wherein the substrate tube is used to generate heat when powered;

[0012] An insulating material is provided on the inner wall or the outer wall of the base tube. The insulating material is continuously provided around the circumference of the base tube and constitutes the insulating tube.

[0013] Optionally, the step of providing an insulating material on the inner wall or the outer wall of the substrate tube, wherein the insulating material is continuously provided around the circumference of the substrate tube to form the insulating tube, includes:

[0014] Applying an insulating material to the inner wall or the outer wall of the substrate tube to obtain an insulating layer continuously arranged around the circumference of the substrate tube;

[0015] The insulating layer is solidified and sintered to obtain the insulating tube.

[0016] Optionally, after obtaining the heating circuit, the method further includes: providing a protective layer outside the heating circuit.

[0017] In a second aspect, an embodiment of the present application provides a heating body, comprising an insulating tube and a heating circuit, wherein the insulating tube has a accommodating cavity for accommodating at least part of an aerosol generating matrix; the heating circuit is fixedly connected to the radial inner wall or outer wall of the insulating tube; wherein the heating circuit is used to generate heat when power is supplied.

[0018] In the heating element provided in the embodiment of the present application, the heating circuit fixedly arranged on the radial inner wall or outer wall of the insulating tube has both conductive and heating functions, and its structure is relatively simple, which helps to reduce the processing difficulty and simplify the processing technology.

[0019] Optionally, the number of the heating circuit is at least one. When the number of the heating circuits is at least two, any two adjacent heating circuits can be electrically connected in parallel or in series.

[0020] Optionally, at least one of the heating circuits includes a first circuit and a second circuit that are connected, the first circuit is arranged to extend along the circumference of the insulating tube, and the second circuit is arranged to extend along the axial direction of the insulating tube.

[0021] Optionally, the heating element further includes pins fixedly connected to the heating circuit, and the number of the pins is at least two and the pins are arranged at intervals.

[0022] Optionally, the heating element further includes a protective layer, which is attached to a side of the heating circuit facing away from the insulating tube and is used to protect the heating circuit.

[0023] Optionally, the thickness of the protective layer is 0.02 mm to 0.3 mm.

[0024] Optionally, the material of the heating circuit includes at least one of a metal material and a metal ceramic material.

[0025] Optionally, along the radial direction of the insulating tube, the thickness of the heating circuit is 0.05 mm to 0.3 mm.

[0026] Optionally, the material of the insulating tube includes glass glaze.

[0027] Optionally, the thickness of the insulating tube in the radial direction is 0.05 mm to 0.3 mm.

[0028] Optionally, a strip-shaped hole communicating with the accommodating cavity is provided on the insulating tube, and the number of the strip-shaped hole is at least one, and any one of the strip-shaped holes is extended along the axial direction or the circumferential direction of the insulating tube.

[0029] In a third aspect, an embodiment of the present application provides an aerosol generating device, comprising a heating element prepared by the method for preparing a heating element described in any one of the above items, or comprising a heating element described in any one of the above items.

[0030] Compared with the prior art, this application has at least the following beneficial effects:

[0031] The heating element preparation method provided in the embodiment of the present application can prepare a new heating element through an improved preparation method, wherein the preparation method is relatively simple to operate and can improve the reliability and service life of the heating element by improving the thickness uniformity of the heating circuit in different areas; in addition, the preparation method can also reduce the difficulty of preparing the heating circuit by first preparing a tubular substrate tube and then preparing an insulating tube, while simplifying the preparation process; and the prepared heating element has the advantages of simple structure and low processing difficulty compared with other heating elements.

[0032] The aerosol generating device provided in the embodiment of the present application includes the beneficial effects of any one or more of the above-mentioned heating elements and their preparation methods, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 A flow chart of a method for preparing a heating element provided in an embodiment of the present application;

[0035] Figure 2A-2CA schematic diagram of the preparation process of the heating element provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of the structure of the heating element provided in an embodiment of the present application;

[0037] Figure 4 for Figure 3 Schematic diagram of the flat expansion of the heating circuit;

[0038] Figure 5 A schematic structural diagram of a heating element provided in another embodiment of the present application;

[0039] Figure 6 A schematic diagram of the use of the aerosol generating device provided in an embodiment of the present application;

[0040] Figure 7 for Figure 6 Schematic diagram of the cross-section structure.

[0041] Among them, the reference numerals in the figures are:

[0042] 100. Aerosol generating device; 10. Heating element; 20. Aerosol generating substrate;

[0043] 1. Base material tube; 11. Heating circuit; 111. First circuit; 112. Second circuit; 2. Insulating tube; 201. Accommodating cavity; 202. Strip hole; 3. Pin; 31. First pin; 32. Second pin. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0045] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0051] In an embodiment of the present application, a heating element 10 and a method for preparing the same, as well as an aerosol generating device 100 are provided. Those skilled in the art will appreciate that the heating element 10 is a key component of the aerosol generating device 100 and is used to provide heat to the aerosol generating substrate 20 to be heated, thereby enabling the aerosol generating substrate 20 to be heated and form an aerosol.

[0052] The "aerosol-generating substrate 20" refers to a product that can form an aerosol when heated. The aerosol may contain volatile compounds. The aerosol-generating substrate 20 may be solid or liquid.

[0053] The "aerosol-generating device 100" is a device that heats the aerosol-generating substrate 20 to a certain temperature, thereby atomizing the corresponding components in the aerosol-generating substrate 20 to form an inhalable aerosol. Inhalation refers to the process of inhaling the aerosol through the user's mouth or nose into the user's oral cavity, nasal cavity, or lungs.

[0054] See also Figure 1 , the embodiment of the present application provides a method for preparing a heating element 10, comprising:

[0055] Step S1, obtaining a heating substrate, wherein the heating substrate comprises a base tube 1 and an insulating tube 2 fixedly connected along a radial direction thereof;

[0056] Step S2: performing patterning processing on the substrate tube 1 to obtain the heating circuit 11.

[0057] In the preparation method of the heating element 10 provided in the embodiment of the present application, the insulating tube 2 is fixedly connected to the substrate tube 1, and after the substrate tube 1 is patterned, the heating circuit 11 is fixed on the wall of the insulating tube 2, thereby effectively simplifying the preparation process of the heating element 10 and reducing the processing difficulty of the heating element 10; at the same time, by first preparing the tubular substrate tube 1, it can help improve the uniformity of the thickness of the heating circuit 11 prepared subsequently in different areas, thereby improving the reliability of the heating element 10.

[0058] Furthermore, in step S1, the substrate tube 1 and the insulating tube 2 are coaxially nested and integrated. Therefore, the heating circuit 11 prepared in step S2 can be supported and fixed to the insulating tube 2 without the need for additional support structures or connecting film layers. This helps reduce the thickness of the heating element 10 and further reduces the size of the heating element 10, making it more compatible with the compact layout requirements of the aerosol generating device 100. The insulating tube 2 also helps isolate the heating circuit 11 from the external environment.

[0059] Most importantly, in the heating element 10 prepared by the above method, there is no assembly gap between the heating circuit 11 and the insulating tube 2, so there will be no local overheating problem caused by thermal resistance, and the heat generated by the heating circuit 11 can be directly transferred to the aerosol generating substrate 20 to be heated, or quickly transferred to the aerosol generating substrate 20 to be heated through the wall of the insulating tube 2; and the distribution range of the heating circuit 11 obtained by graphical processing is also more flexible, and users can flexibly adjust the shape of the heating circuit 11 according to equipment needs to adapt to different aerosol atomization requirements.

[0060] Specifically, in step S1, a heating substrate is obtained, wherein the heating substrate includes a base tube 1 and an insulating tube 2 fixedly connected along a radial direction thereof, including:

[0061] Step S11: obtaining a substrate tube 1, wherein the substrate tube 1 is used to generate heat when powered;

[0062] Step S12 : Dispose an insulating material on the inner wall or outer wall of the base tube 1 . The insulating material is continuously disposed around the circumference of the base tube 1 to form an insulating tube 2 .

[0063] Step S11 can be prepared by direct molding or other methods to obtain the substrate tube 1, see Figure 2A The substrate tube 1 can be prepared by selecting a material that generates heat when it is energized, so that it has a better heating function. In step S12, the insulating material is continuously arranged around the circumference of the substrate tube 1 to form a tubular insulating tube 2, which can serve as a physical isolation layer for the substrate tube 1. Figure 2B .

[0064] In step S12, an insulating material is provided on the inner wall or the outer wall of the base tube 1. The insulating material is continuously provided around the circumference of the base tube 1 to form the insulating tube 2. The step includes:

[0065] Step S121: coating an insulating material on the inner wall or outer wall of the substrate tube 1 to obtain an insulating layer continuously disposed around the circumference of the substrate tube 1;

[0066] Step S122 , solidifying and sintering the insulating layer to obtain the insulating tube 2 .

[0067] Specifically, in step S121 , the insulating material may be coated on the inner wall or outer wall of the substrate tube 1 by dipping or spraying, so as to obtain an insulating layer continuously arranged around the circumference of the substrate tube 1 .

[0068] For example, taking the coating of insulating material on the inner wall of the substrate tube 1 as an example, the insulating material can be evenly coated on the inner wall of the substrate tube 1 by rotary coating, brushing, dipping and spraying, and a continuous insulating layer can be formed. Subsequently, the above-mentioned continuous insulating layer can be cured and sintered to obtain the insulating tube 2.

[0069] The base tube 1 is a hollow cylindrical tube, and the prepared insulating tube 2 is also a cylindrical tube fixed on the inner wall of the base tube 1 .

[0070] For example, taking the coating of insulating material on the outer wall of the substrate tube 1 as an example, the insulating material can be wrapped and arranged on the outer wall of the substrate tube 1 by spraying, rolling or dipping, so as to achieve full circumferential insulation coverage of the outer wall and form a continuous insulation layer. Subsequently, the above-mentioned continuous insulation layer can be cured and sintered to obtain the insulating tube 2.

[0071] Specifically, the above-mentioned insulating material is a high-temperature resistant insulating material and may include glass glaze.

[0072] Glass glaze primarily consists of glass formers such as silicon dioxide (SiO2), borax (B2O3), and aluminum oxide (Al2O3), as well as metal oxides (such as copper oxide, iron oxide, and cobalt oxide, used to adjust color or performance) and flux (to lower the sintering temperature). After sintering, the glass glaze forms a glass glaze, which has good light transmittance and is resistant to high temperatures and corrosion. The insulating tube 2 made from the glass glaze exhibits excellent corrosion resistance and effectively blocks gas and liquid penetration.

[0073] Specifically, the glass glaze can be attached to the wall of the substrate tube 1 by a glass glaze coating technique and formed into a glass glaze after solidification (drying) and sintering. The glass glaze can be firmly bonded to the wall of the substrate tube 1 after melting.

[0074] In some embodiments, in order to improve the strength of the bond between the insulating tube 2 and the substrate tube 1, the corresponding tube wall of the prepared substrate tube 1 can be pretreated (such as sandblasting, roughening, etc.) before step S11 and step S12 to enhance the surface roughness, so that the surface roughness of the substrate tube 1 can form a mechanical anchor with the molten glass glaze.

[0075] In some embodiments, in step S2 , the step of patterning the substrate tube 1 to obtain the heating circuit 11 includes: laser engraving the substrate tube 1 , and / or etching the substrate tube 1 .

[0076] It should be noted that etching refers to chemically etching the substrate tube 1 to obtain heating circuits 11 that meet design requirements. This etching method can selectively etch different areas of the substrate tube 1 using mask protection. Compared to laser engraving, this method is less complex and facilitates large-scale fabrication of the heating element 10.

[0077] Specifically, the substrate tube 1 can be made of a metal material and / or a metal ceramic material that generates heat when electricity is applied.

[0078] Laser engraving can use a high-energy-density laser beam (such as fiber laser, ultraviolet laser) for non-contact processing to directly engrave a heating circuit 11 with high precision on the surface of the substrate tube 1. It is particularly suitable for the precision processing of heating circuits 11 with complex trajectories such as spiral and serpentine shapes.

[0079] Compared to traditional printing processes, laser engraving technology achieves higher precision for curved substrate tubes 1, effectively improving the geometric consistency of the heating circuit 11. Furthermore, the effect of laser engraving on a material depends on its optical properties (laser energy absorption efficiency), thermophysical properties (melting point, thermal conductivity), and mechanical properties (brittleness, hardness). Glass glaze absorbs laser energy less efficiently and therefore will not be engraved by the laser.

[0080] Therefore, both laser engraving and chemical etching can achieve patterning of the substrate tube 1 while ensuring that the insulating tube 2 is not affected by the patterning process, and prepare a heating circuit 11 that meets the design requirements.

[0081] After step S2 is completed, the obtained heating circuit 11 is fixedly connected to the wall of the insulating tube 2. Figure 2C .

[0082] It should be noted that the prepared heating circuit 11 can be a spiral structure arranged around the wall of the insulating tube 2, or a serpentine structure, or a mesh structure. Figure 2C The shape of the heating circuit 11 drawn in the figure is only for illustration, and this embodiment does not limit the specific shape of the heating circuit 11.

[0083] In the method for preparing the heating element 10 provided in the embodiment of the present application, after step S2 , the method further includes step S3 of providing a protective layer outside the heating circuit 11 .

[0084] The protective layer is used to cover and protect the heating circuit 11 to prevent the heating circuit 11 from being corroded by water vapor, oxygen and other chemical substances in the external environment.

[0085] Specifically, the protective layer is attached to the side of the heating circuit 11 facing away from the insulating tube 2 to isolate the heating circuit 11 from the external environment. The protective layer is used to provide certain protection to the heating circuit 11 through physical isolation or chemical protection, thereby helping to extend the durability and service life of the heating circuit 11.

[0086] Specifically, the material of the protective layer may include any one or more materials such as epoxy resin, polyurethane, and parylene, and may also include a metal plating layer, such as tin plating, nickel plating, and silver plating.

[0087] It can be understood that the preparation method of the heating element 10 provided in the embodiment of the present application not only improves the problems of poor thickness uniformity and poor reliability of the heating circuit 11 in the traditional heating element 10, but also reduces the processing difficulty of the heating element 10 to a certain extent, which helps to simplify the preparation process of the heating element 10 and reduce the processing cost of the heating element 10; the prepared heating element 10 also has the advantages of simple structure and low processing difficulty compared with other heating elements 10.

[0088] Based on the same inventive concept, the present embodiment also provides a heating element 10, see Figure 3-Figure 5 .

[0089] Specifically, the heating body 10 provided in the embodiment of the present application includes an insulating tube 2 and a heating circuit 11 fixedly arranged on the radial inner wall or outer wall of the insulating tube 2, wherein the insulating tube 2 has a accommodating cavity 201, and the accommodating cavity 201 is used to accommodate at least part of the aerosol generating matrix 20; the heating circuit 11 is fixedly connected to the radial inner wall or outer wall of the insulating tube 2; wherein the heating circuit 11 is used to generate heat when power is on.

[0090] The insulating tube 2 can be used to isolate the heating circuit 11 from the external environment. The accommodating cavity 201 located in the insulating tube 2 provides a certain placement space for the aerosol generating matrix 20. The heat generated by the heating circuit 11 fixed on the insulating tube 2 can act on the aerosol generating matrix 20 located in the accommodating cavity 201 to heat it and generate aerosol.

[0091] For example, when the heating circuit 11 is fixed to the inner wall of the insulating tube 2, a portion of the heat generated by the heating circuit 11 when it is energized directly heats the aerosol generating matrix 20, and the other portion is used to heat the insulating tube 2. After the insulating tube 2 absorbs the heat, it heats the aerosol generating matrix 20 located in the accommodating cavity 201.

[0092] For example, when the heating circuit 11 is fixed to the outer wall of the insulating tube 2, the heat generated by the heating circuit 11 when it is energized acts on the insulating tube 2. The insulating tube 2 absorbs the heat and heats the aerosol generating substrate 20 located in the accommodating cavity 201.

[0093] In the heating element 10 provided in the embodiment of the present application, the heating circuit 11 fixedly arranged on the radial inner wall or outer wall of the insulating tube 2 has both conductive and heating functions. Its structure is relatively simple, which helps to reduce processing difficulty and simplify the processing technology.

[0094] In some embodiments, the heating element 10 further includes a protective layer. Figure 3 The protective layer is attached to the side of the heating circuit 11 facing away from the insulating tube 2 to protect the heating circuit 11 from external physical damage, chemical corrosion, etc., thereby extending the service life of the heating element 10.

[0095] The material of the protective layer can be found in the above text. When preparing the protective layer, it is important to note that its thickness does not need to be too thick. An overly thick protective layer may hinder heat transfer, resulting in the heat generated by the heating circuit 11 not being effectively applied to the aerosol generating substrate 20, thus affecting the aerosol generation effect.

[0096] Specifically, the thickness of the protective layer is 0.02 mm to 0.3 mm. In actual processing, the thickness of the protective layer can be set to any value such as 0.02 mm, 0.08 mm, 0.14 mm, 0.20 mm, 0.26 mm, or 0.30 mm as needed.

[0097] The above thickness range can ensure that the protective layer effectively protects the heating circuit 11 while not affecting the heat dissipation performance of the heating circuit 11 due to excessive thickness.

[0098] In some embodiments, the number of the heating circuit 11 is at least one.

[0099] See also Figure 3 and Figure 4 , the number of the heating circuit 11 is one. Of course, in other similar embodiments, the number of the heating circuit 11 can also be set to two or even more as needed.

[0100] When there are at least two heating circuits 11, any two adjacent heating circuits 11 can be electrically connected in parallel or in series. Parallel connection ensures the voltage across each heating circuit 11 is the same, allowing for flexible adjustment of the total power as needed. Series connection allows current to flow through each heating circuit 11 sequentially, facilitating the achievement of a specific heating intensity and temperature distribution. This design provides more possibilities for regulating the heating characteristics of the heating element 10, facilitating adjustments to allow for different heating zones in the heating circuit 11 or different heating zones to have different heating temperatures, according to design requirements.

[0101] Specifically, different heating circuits 11 can be adjusted to be arranged in sequence along the axial direction of the heating element 10. At this time, by controlling the different heating circuits 11 to be connected to the external circuit, different axial regions of the heating element 10 can be adjusted to heat the aerosol generating matrix 20 located in the accommodating cavity 201 respectively; and / or, different heating circuits 11 can be arranged in sequence around the circumference of the heating element 10. At this time, by controlling the different heating circuits 11 to be connected to the external circuit, different circumferential regions of the heating element 10 can be adjusted to heat the aerosol generating matrix 20 located in the accommodating cavity 201 respectively.

[0102] The heating circuit 11 can be shaped as a spiral extending circumferentially and axially around the insulating tube 2, or it can be shaped as a serpentine, mesh, or the like, forming an annular or columnar heating area. By adjusting the shape of the heating circuit 11, the heating circuit 11 can be arranged to extend circumferentially around the insulating tube 2, thereby heating various locations along the circumference of the insulating tube 2, and / or the heating circuit 11 can be arranged to extend axially along the insulating tube 2, thereby heating various locations along the axial direction of the insulating tube 2.

[0103] The above-described structural design enables a more even distribution of heat circumferentially and axially around the insulating tube 2, facilitating more comprehensive and efficient heating of the aerosol-generating substrate 20 within the accommodating cavity 201. For example, when heating a rod-shaped or rod-shaped aerosol-generating substrate 20, the combined circumferential and axial arrangement of the heating circuits 11 ensures that all portions of the aerosol-generating substrate 20 within the accommodating cavity 201 are heated relatively evenly, thereby improving the quality and stability of aerosol generation.

[0104] See also Figure 3 and Figure 4 , the shape of the heating circuit 11 disclosed in the embodiment of the present application is introduced below, assuming that the number of the heating circuit 11 is one.

[0105] Figure 4 1 is a schematic diagram of a planar unfolded structure obtained after the heating circuit 11 is unfolded along the circumference of the heating element 10 . The heating circuit 11 in the figure is a zigzag serpentine structure.

[0106] Specifically, the at least one heating circuit 11 includes a first circuit 111 and a second circuit 112 connected to each other. The first circuit 111 is extended along the circumferential direction of the insulating tube 2 , and the second circuit 112 is extended along the axial direction of the insulating tube 2 .

[0107] See also Figure 4In the figure, there are multiple first lines 111 and multiple second lines 112. In addition to the first lines 111 and / or second lines 112 at both ends of the heating line 11, the ends of the first line 111 in the middle of the heating line 11 are respectively connected to two second lines 112. Similarly, the ends of the second line 112 in the middle of the heating line 11 are respectively connected to two first lines 111.

[0108] Different first lines 111 have different sizes and distribution positions, and are connected through different second lines 112; similarly, different second lines 112 have different sizes and distribution positions, and are connected through different first lines 111, and finally form a heating line 11 arranged around the insulating tube 2, see Figure 3 and Figure 4 .

[0109] In the embodiment of the present application, the material of the heating circuit 11 includes at least one of a metal material and a metal ceramic material.

[0110] Metal materials have good electrical and thermal conductivity and can quickly convert electrical energy into thermal energy to meet the heating needs of the heating element 10, such as nickel-chromium alloys. Metal ceramic materials combine the high thermal conductivity of metals with the high temperature resistance and corrosion resistance of ceramics. Therefore, the heating circuit 11 made of metal ceramic materials can maintain a relatively stable working state in high-temperature environments. Metal ceramic materials can include metal ceramic materials containing metal oxides, such as tungsten (W)-aluminum oxide (Al2O3) metal ceramics, molybdenum (Mo)-aluminum oxide (Al2O3) metal ceramics, nickel (Ni)-aluminum oxide (Al2O3) metal ceramics, silicon carbide (SiC) metal composite ceramics, etc.

[0111] In the embodiment of the present application, the thickness of the heating circuit 11 along the radial direction of the insulating tube 2 is 0.05 mm to 0.3 mm.

[0112] Specifically, the thickness of the heating circuit 11 can be any value among 0.05 mm, 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm, etc.

[0113] When the thickness of the heating circuit 11 is too thin, the heating circuit 11 may not be able to withstand sufficient current, resulting in low overall heating power of the heating element 10, which is difficult to meet the heating requirements of the aerosol generating matrix 20; and if the heating circuit 11 is too thick, it will not only increase the material cost, but also cause uneven heat distribution during the heating process.

[0114] In the embodiment of the present application, the thickness of the heating circuit 11 is within the range of 0.05 mm to 0.3 mm, which can meet the heating requirement of the aerosol generating matrix 20 while ensuring the stability of the heating circuit 11 .

[0115] In the embodiment of the present application, the material of the insulating tube 2 includes glass glaze.

[0116] The glass glaze has good insulation performance, high temperature resistance and chemical stability, and can effectively isolate the heating circuit 11 from the external environment, while remaining stable at high temperatures, ensuring that the heating element 10 can operate safely and reliably under power-on regulation.

[0117] In the embodiment of the present application, the thickness of the insulating tube 2 along the radial direction of the insulating tube 2 is 0.05 mm to 0.3 mm.

[0118] Specifically, the thickness of the insulating tube 2 can be any value among 0.05 mm, 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm, etc.

[0119] When the thickness of the insulating tube 2 is too thin, its overall strength is low and its insulation performance is relatively poor; when it is too thick, the heating element 10 will be heavy and large in size, which will affect the heat dissipation and heating effect of the heating circuit 11 to a certain extent.

[0120] In the embodiment of the present application, by setting the thickness of the insulating tube 2 to 0.05 mm to 0.3 mm, the insulating tube 2 can have a good heat dissipation effect while the overall strength of the heating element 10 meets the requirements.

[0121] Optionally, the insulating tube 2 is provided with a strip-shaped hole 202 communicating with the accommodating cavity 201 . There is at least one strip-shaped hole 202 , and any strip-shaped hole 202 is extended along the axial direction or circumferential direction of the insulating tube 2 .

[0122] See also Figure 3 The insulating tube 2 of the heating element 10 is provided with three spaced-apart strip holes 202, two of which are spaced-apart along the circumference of the insulating tube 2, and the extension direction of any one of the strip holes 202 is parallel to the axis of the insulating tube 2, and the other strip hole 202 is arranged along the circumference of the insulating tube 2.

[0123] The strip-shaped holes 202 are spaced apart from the heating circuit 11 to optimize airflow and help improve the atomization effect of the aerosol generating matrix 20 .

[0124] In some embodiments, the strip-shaped holes 202 can be used to facilitate the flow of gas relative to the containing cavity 201 , helping to improve the efficiency and quality of aerosol generation.

[0125] Specifically, the gas in the external environment can flow into the accommodating cavity 201 through the strip-shaped holes 202 to mix with the heated aerosol-generating substrate 20 and form a suitable aerosol.

[0126] Alternatively, in other similar embodiments, the strip-shaped holes 202 can be used to reduce the weight of the insulating tube 2 to a certain extent, while the insulating tube 2 can also maintain a certain structural strength.

[0127] See also Figure 5 The embodiment of the present application further provides a heating element 10 , which includes a pin 3 .

[0128] Specifically, the pins 3 are fixedly connected to the heating circuit 11. There are at least two pins 3 and they are spaced apart.

[0129] One end of the pin 3 is connected to the heating circuit 11 of the heating element 10 , and the other end extends relative to the heating element 10 and contacts the external circuit to achieve electrical connection, thereby providing a connection point for the heating circuit 11 to connect to the external circuit.

[0130] Specifically, the pins 3 arranged at intervals are connected to different positions of the external circuit respectively, so as to achieve a stable electrical connection between the heating element 10 and the external circuit, and ensure that the heating circuit 11 can be energized and generate heat normally.

[0131] See also Figure 5 The heating element 10 provided in the embodiment of the present application has three pins 3. Along the axial direction of the insulating tube 2, all the pins 3 point in the same direction.

[0132] The heating element 10 has a continuous heating circuit 11, and the pins 3 connected to both ends of the heating circuit 11 are defined as first pins 31, and the pin 3 connected to the middle of the heating circuit 11 is defined as second pin 32. In this embodiment, there are two first pins 31 and one second pin 32.

[0133] By controlling different pins 3 to be electrically connected to external circuits, the heating power of the heating element 10 can be regulated.

[0134] Specifically, when the heating element 10 is electrically connected to an external circuit via two first pins 31, the entire heating circuit 11 in the heating element 10 is energized and generates heat. When the heating element 10 is electrically connected to an external circuit via one of the first and second pins 31, 32, only the portion of the heating circuit 11 between the energized first and second pins 31, 32 is energized and generates heat. Under the condition of a constant voltage, the former has a greater heating power than the latter, and the former has a greater heating range than the latter.

[0135] Therefore, by adjusting the pin 3 through which the heating circuit 11 is connected to the external circuit, the heating power and heating range of the heating circuit 11 can be adjusted.

[0136] In some embodiments, a lead-out end is provided on a portion of the surface of the heating circuit 11 facing away from the insulating tube 2 , and the pin 3 can be fixedly connected to the heating circuit 11 through the lead-out end.

[0137] It should be noted that the thickness of the lead-out end is substantially consistent with the thickness of other regions of the heating circuit 11 , but its shape is different from that of other regions.

[0138] In order to ensure that the pin 3 can be electrically connected to the heating circuit 11 through the lead-out end, a protective layer can be prepared on the outer surface of the heating circuit 11 after the pin 3 is connected to the lead-out end.

[0139] In the embodiment of the present application, the pin 3 is a columnar structure. In other similar embodiments, the pin 3 can be adjusted to a sheet structure or the like according to design requirements. The pin 3 can be fixedly connected to the heating circuit 11 by welding.

[0140] It can be understood that the heating element 10 provided in the embodiment of the present application has the advantages of simple structure, high reliability, and low processing difficulty, and can conveniently limit, fix, and heat the aerosol generating matrix 20.

[0141] Based on the same inventive concept, in a third aspect, an embodiment of the present application provides an aerosol generating device 100, comprising a heating element 10 prepared by the method for preparing the heating element 10 described in any one of the above items, or comprising a heating element 10 described in any one of the above items.

[0142] See also Figure 6 and Figure 7 The aerosol generating device 100 further includes a power supply module, and the heating element 10 is electrically connected to the power supply module.

[0143] Specifically, the power supply module can be electrically connected to the heating element 10 through the pin 3 .

[0144] In some embodiments, the power supply module includes an electrically connected battery and a charging interface. The atomizing device also includes a control circuit.

[0145] When the aerosol generating device 100 is working, the power supply module is used to transmit electric energy of a certain power to the heating element 10 . The heating element 10 generates heat and acts on the aerosol generating matrix 20 . The aerosol generating matrix 20 is heated to generate aerosol.

[0146] It will be understood by those skilled in the art that the aerosol generating substrate 20 may be a rod-shaped structure. Figure 6 and Figure 7Of course, the aerosol generating substrate 20 may also have other structures. For example, the aerosol generating substrate 20 may have a mouthpiece that is convenient for the user to inhale.

[0147] Those skilled in the art should know that the structure of the aerosol generating matrix 20 can refer to the existing structure in the relevant technology, and the assembly structure and appearance of each component in the aerosol generating device 100 can refer to the existing structure in the relevant technology, and will not be described in detail in this application.

[0148] It is understandable that the aerosol generating device 100 provided in the embodiment of the present application has the beneficial effects of any one or more of the above-mentioned methods for preparing the heating element 10 and the heating element 10, which will not be described in detail here.

[0149] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0150] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for preparing a heating element, characterized in that: include: Obtaining a heat-generating base body, the heat-generating base body comprising a base material tube (1) and an insulating tube (2) fixedly connected along a radial direction thereof; The substrate tube (1) is subjected to a graphic processing to obtain a heating circuit (11).

2. The method for preparing a heating element according to claim 1, wherein: The step of patterning the substrate tube (1) to obtain the heating circuit (11) comprises: The substrate tube (1) is subjected to a laser engraving process, and / or the substrate tube (1) is subjected to an etching process.

3. The method for preparing a heating element according to claim 1, wherein: The step of obtaining a heating base body, wherein the heating base body comprises a base material tube (1) and an insulating tube (2) fixedly connected along a radial direction thereof, comprises: Obtaining a substrate tube (1), wherein the substrate tube (1) is used to generate heat under an electric condition; An insulating material is provided on the inner wall or the outer wall of the base material tube (1), and the insulating material is continuously provided around the circumference of the base material tube (1) and constitutes the insulating tube (2).

4. The method for preparing a heating element according to claim 3, wherein: The step of arranging an insulating material on the inner wall or outer wall of the base tube (1), wherein the insulating material is continuously arranged around the circumference of the base tube (1) to form the insulating tube (2), comprises: Applying an insulating material to the inner wall or the outer wall of the substrate tube (1) to obtain an insulating layer continuously arranged around the circumference of the substrate tube (1); The insulating layer is solidified and sintered to obtain the insulating tube (2).

5. The method for preparing a heating element according to any one of claims 1 to 4, characterized in that: After obtaining the heating circuit (11), the method further comprises: arranging a protective layer outside the heating circuit (11).

6. A heating element, characterized in that: include: An insulating tube (2) having a receiving cavity (201), wherein the receiving cavity (201) is used to receive at least a portion of an aerosol generating substrate (20); A heating circuit (11) is fixedly connected to the radial inner wall or outer wall of the insulating tube (2); The heating circuit (11) is used to generate heat when powered.

7. The heating element according to claim 6, characterized in that The number of the heating circuits (11) is at least one. When the number of the heating circuits (11) is at least two, any two adjacent heating circuits (11) can be electrically connected in parallel or in series.

8. The heating element according to claim 7, characterized in that At least one of the heating circuits (11) comprises a first circuit (111) and a second circuit (112) connected to each other, wherein the first circuit (111) is arranged to extend along the circumference of the insulating tube (2), and the second circuit (112) is arranged to extend along the axial direction of the insulating tube (2).

9. The heating element according to claim 7, characterized in that The heating element (10) further comprises pins (3) fixedly connected to the heating circuit (11), and the number of the pins (3) is at least two and they are arranged at intervals.

10. The heating element according to claim 6, characterized in that The heating element (10) further comprises a protective layer, which is attached to the side of the heating circuit (11) facing away from the insulating tube (2) and is used to protect the heating circuit (11).

11. The heating element according to claim 10, characterized in that The thickness of the protective layer is 0.02 mm to 0.3 mm.

12. The heating element according to any one of claims 6 to 11, characterized in that: The material of the heating circuit (11) includes at least one of a metal material and a metal ceramic material; and / or, along the radial direction of the insulating tube (2), the thickness of the heating circuit (11) is 0.05 mm to 0.3 mm; and / or, the material of the insulating tube (2) includes glass glaze; And / or, the thickness of the insulating tube (2) in the radial direction is 0.05 mm to 0.3 mm.

13. The heating element according to claim 6, characterized in that The insulating tube (2) is provided with a strip-shaped hole (202) communicating with the accommodating cavity (201), the number of the strip-shaped hole (202) is at least one, and any one of the strip-shaped holes (202) is extended along the axial direction or the circumferential direction of the insulating tube (2).

14. An aerosol generating device, characterized in that: The invention comprises a heating element (10) prepared by the method for preparing a heating element according to any one of claims 1 to 5, or comprises a heating element (10) prepared by any one of claims 6 to 13.

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