Heating assembly and aerosol generating device comprising same

Abstract

The utility model relates to a heating assembly and an aerosol generating device comprising the heating assembly, and the heating assembly comprises a tubular base body which is internally provided with a containing cavity extending in the longitudinal direction, and the containing cavity is used for containing at least a part of an aerosol generating product; the heating layers extend in the longitudinal direction, are arranged on the tubular base body at intervals and are distributed in the circumferential direction of the tubular base body, and the heating layers are configured to release heat to heat the aerosol generating product.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, and in particular to a heating component and an aerosol generation apparatus including the heating component. Background Technology

[0002] An aerosol generating device is a device that enables an aerosol-generating product to produce an aerosol for a user to inhale when heated without combustion. A typical aerosol generating device includes a tubular substrate for receiving at least a portion of the aerosol-generating product and a serpentine heating circuit arranged on the tubular substrate. The heating circuit includes multiple interconnected heating tracks with different extension directions. One or more heating tracks located near the proximal end of the tubular substrate in the longitudinal direction are defined as proximal tracks, one or more heating tracks located near the distal end of the tubular substrate in the longitudinal direction are defined as distal tracks, and one or more heating tracks located at the center of the heating circuit in the longitudinal direction are defined as center tracks.

[0003] However, this type of heating circuit has a complex structure, requiring high precision in processing equipment and control programs, which is detrimental to improving yield and reducing production costs. Furthermore, because the central trajectory has heating tracks on both sides of the longitudinal direction, while the proximal and distal tracks only have heating tracks on one side of the longitudinal direction, heat is more likely to accumulate in the central trajectory of the heating circuit. This results in a large temperature difference within the same heating circuit along the longitudinal direction, which is not conducive to effectively heating aerosol-generated products. Utility Model Content

[0004] The purpose of this application is to provide a heating component and an aerosol generating device including the heating component, wherein the heating layer structure has a relatively simple shape and helps to reduce the temperature difference in the longitudinal direction of the same heating layer.

[0005] At least one embodiment of this application provides a heating assembly, the heating assembly comprising:

[0006] A tubular matrix having a longitudinally extending receiving cavity for accommodating at least a portion of an aerosol-generated article; and

[0007] Multiple heating layers extending longitudinally are disposed at intervals on the tubular substrate and distributed circumferentially along the tubular substrate. The heating layers are configured to release heat to heat the aerosol-generated article.

[0008] As an example, multiple heating layers are uniformly distributed on the tubular substrate.

[0009] As an example, the number A of the heating layers satisfies: 2≤A≤15, or 6≤A≤10.

[0010] As an example, the ratio B of the longitudinal extension length of at least one of the heating layers to the longitudinal length of the tubular substrate satisfies: 0.6 ≤ B ≤ 1, or 0.8 ≤ B ≤ 1; and / or

[0011] At least two of the heating layers have the same longitudinal extension length.

[0012] As an example, the heating layer satisfies at least one of the following conditions:

[0013] At least two of the heating layers have the same width;

[0014] The width C of the heating layer satisfies: 0.5mm≤C≤3mm, or 1mm≤C≤2mm;

[0015] The ratio D of the diameter of the tubular substrate to the width of the heating layer satisfies: 2≤D≤10, or 3≤D≤8;

[0016] The spacing E between two adjacent heating layers satisfies: 0.5mm ≤ E ≤ 3mm, or 1mm ≤ E ≤ 2mm; and

[0017] The spacing between two adjacent heating layers is less than or equal to the width of the heating layer.

[0018] As an example, it also includes a first electrode layer that extends circumferentially along the tubular substrate and is electrically connected to the plurality of heating layers.

[0019] As an example, the tubular substrate has a proximal end and a distal end disposed opposite each other in the longitudinal direction, and the first electrode layer is electrically connected to the ends of the plurality of heating layers disposed adjacent to the proximal end.

[0020] As an example, it also includes a second electrode layer disposed longitudinally at a distance from the first electrode layer, the second electrode layer extending circumferentially along the tubular substrate and simultaneously electrically connected to the plurality of heating layers.

[0021] As an example, it also includes a first common electrode layer disposed between the first electrode layer and the second electrode layer, the first common electrode layer extending circumferentially along the tubular substrate and simultaneously electrically connected to a plurality of heating layers, such that at least a portion of the heating layers includes a first heating portion electrically connected between the first electrode layer and the first common electrode layer and a second heating portion electrically connected between the second electrode layer and the first common electrode layer.

[0022] As an example, the first heating element and the second heating element have the same longitudinal extension length.

[0023] As an example, the tubular substrate includes a first tubular substrate formed by winding a first cast sheet and a second tubular substrate formed by winding a second cast sheet, the second tubular substrate being disposed around at least partially on the periphery of the first tubular substrate, at least a portion of the heating layer or at least a portion of the heating layer being disposed between the first tubular substrate and the second tubular substrate, and at least a portion of the first electrode layer being exposed outside the second tubular substrate.

[0024] As an example, the second tubular substrate has a first through hole, which is provided in the middle region of the first electrode layer in the circumferential direction, so that at least a portion of the middle region of the first electrode layer is exposed.

[0025] As an example, the first tubular substrate has a first seam extending longitudinally, the first seam being formed by joining the two sides of the first cast sheet in the circumferential direction.

[0026] The second tubular substrate has a second joint extending longitudinally, which is formed by joining the two sides of the second cast sheet in the circumferential direction.

[0027] The first joint and the second joint are offset from each other in the circumferential direction of the tubular substrate.

[0028] As an example, the tubular matrix has a proximal end and a distal end disposed opposite each other in the longitudinal direction, the proximal end having an outwardly expanding guide surface to guide the aerosol-generating article into the receiving cavity.

[0029] As an example, the heating layer is formed on the tubular substrate by means of printing, coating, deposition, electroplating, particle sputtering or ion implantation.

[0030] At least one embodiment of this application provides an aerosol generating apparatus, the aerosol generating apparatus including the aforementioned heating component, and further including a power supply component, the power supply component being configured to output electrical power to cause the heating component to heat the aerosol generating article.

[0031] The heating assembly and aerosol generating apparatus including the heating assembly provided in the above embodiments include a tubular substrate and multiple heating layers disposed on the tubular substrate. The tubular substrate has a longitudinally extending receiving cavity for receiving at least a portion of the aerosol-generated product. The heating layers all extend longitudinally, and the multiple heating layers are distributed circumferentially along the tubular substrate. The heating layers are used to release heat to heat the aerosol-generated product. Thus, the relatively singular extension direction of the heating layers not only gives the heating layers a simple structural shape but also helps to reduce the temperature difference of the heating layers in the longitudinal direction. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0033] Figure 1 This is a schematic diagram of an aerosol generating apparatus provided in some embodiments of this application;

[0034] Figure 2 This is a schematic diagram of a heating assembly provided in some embodiments of this application;

[0035] Figure 3 yes Figure 2 An exploded view of the heating assembly shown;

[0036] Figure 4 This is a schematic diagram of a first cast sheet and multiple heating layers disposed on the first cast sheet, provided in some embodiments of this application;

[0037] Figure 5 This is a schematic diagram of the first and second cast sheets before winding, provided in some embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the first and second cast sheets being misaligned and superimposed before winding, as provided in some embodiments of this application;

[0039] Figure 7 This is a schematic diagram of a heating assembly provided in other embodiments of this application;

[0040] Figure 8 yes Figure 7 An exploded view of the heating assembly shown;

[0041] In the picture:

[0042] 100. Aerosol generating apparatus; 200. Aerosol generated products;

[0043] 1. Heating assembly; 11. Heating layer; 111. First heating section; 112. Second heating section; 113. Third heating section; 12. Tubular substrate; 121. Receiving cavity; 122. First tubular substrate; 1221. First seam; 123. Second tubular substrate; 1231. Second seam; 1232. First through hole; 1233. Second through hole; 1234. Third through hole; 122'. First cast sheet; 123'. Second cast sheet; 124. Guide surface; 13. First electrode layer; 14. Second electrode layer; 15. First common electrode layer; 16. Second common electrode layer; 17. First heating zone; 18. Second heating zone; 19. Third heating zone;

[0044] 2. Power supply. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0046] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be intervening elements. When an element is referred to as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0049] Please refer to Figure 1This application provides an embodiment of an aerosol generating apparatus 100, which includes a heating component 1 that can release heat to heat an aerosol generating article 200, thereby causing the aerosol generating article 200 to generate aerosols.

[0050] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-generating matrix that, when heated, releases volatile compounds that can form aerosols. The aerosol-generating matrix is ​​intended to be heated, rather than burned, to release the volatile compounds that can form aerosols. Aerosols formed by heating the aerosol-generating matrix may contain fewer known hazardous components than aerosols generated by combustion or pyrolytic degradation of the aerosol-generating matrix. In some embodiments, the aerosol-generating article may be removably attached to an aerosol-generating device. The article may be disposable or reusable.

[0051] As used herein, the term "aerosol-generating matrix" refers to a matrix capable of releasing volatile substances to form inhalable aerosols. The aerosol-generating matrix may include tobacco-containing materials containing volatile tobacco flavor compounds that are released from the matrix upon heating. Specifically, the aerosol-generating matrix may be a tobacco-containing aerosol-generating matrix, preferably a solid tobacco-containing aerosol-generating matrix. Alternatively, the aerosol-generating matrix may include non-tobacco materials. The aerosol-generating matrix may also include aerosol-forming agents. Examples of suitable aerosol-forming agents are glycerol and propylene glycol.

[0052] The aerosol generating matrix may include one or more of the following: powder, granules, pellets, flakes, strips, bands, or sheets, containing one or more of the following: herbaceous plant leaves, tobacco leaves, tobacco vein fragments, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco.

[0053] When the aerosol generating matrix is ​​a solid aerosol generating matrix, the aerosol generating products can be cigarettes, cigarette sticks, or cigars, etc.

[0054] The aerosol generating matrix can be a liquid aerosol generating matrix. The liquid aerosol generating matrix may contain a liquid containing tobacco-containing substances with volatile tobacco flavor components, or it may contain a liquid containing non-tobacco substances. The liquid aerosol generating matrix may contain water, solvents, ethanol, plant extracts, fragrances, flavorings, or vitamin mixtures, etc. Fragrances may include areca nut extract, menthol, peppermint, spearmint oil, various fruit flavor components, etc., but are not limited to these. Flavorings may contain ingredients that can provide users with various fragrances or flavors. Vitamin mixtures may be mixtures containing at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but are not limited to these. When the aerosol generating matrix is ​​a liquid aerosol generating matrix, the aerosol generating product may be a cartridge or an atomizer, etc.

[0055] In some embodiments, the aerosol generating apparatus 100 may be described as an electrically operated aerosol generating apparatus, which is an apparatus including one or more components for supplying energy from, for example, a power supply component to heat the aerosol generating matrix to generate an aerosol.

[0056] Preferably, the aerosol generating apparatus 100 includes a power source 2 for providing electrical power to cause the heating component 1 to release heat to heat the aerosol generating article 200. The power source 2 may include any suitable battery, such as a lithium battery, a rechargeable battery, or a disposable battery.

[0057] In some embodiments, the heating component 1 is configured to heat to a temperature between 200°C and 440°C, thereby enabling the aerosol generating article 200 to generate aerosols.

[0058] In some embodiments, the heating assembly 1 includes a substrate and a heating layer 11 disposed on the substrate, the heating layer 11 being configured to release heat to heat the aerosol-generating article 200.

[0059] In some embodiments, when the aerosol generating article 200 is joined with the aerosol generating device 100, at least a portion of the substrate may be inserted into the interior of the aerosol generating article 200, thereby enabling the heating layer 11 to release heat from the interior of the aerosol generating article 200 to heat the aerosol generating article 200.

[0060] In some embodiments, reference may be made to Figure 2 and Figure 3 The substrate includes a tubular substrate 12 having an internal receiving cavity 121 that can receive at least a portion of the aerosol generating article 200, thereby enabling the heating layer 11 to release heat from the outside of the aerosol generating article 200 to heat the aerosol generating article 200.

[0061] In some embodiments, the heat transfer between the heating component 1 and the aerosol generating article 200 includes heat conduction, so that the heating component 1 may have direct contact with the aerosol generating article 200 or may have a solid contact medium during the heating process of the aerosol generating article 200.

[0062] In some embodiments, heat transfer between the heating component 1 and the aerosol generating article 200 includes thermal radiation, so that there is no solid contact medium between the heating component 1 and the aerosol generating article 200 during the heating process.

[0063] In some embodiments, heat transfer between the heating component 1 and the aerosol generating article 200 includes heat convection, such that the heating component 1 may have a fluid contact medium with the aerosol generating article 200 during the heating process.

[0064] In some embodiments, the heating layer 11 includes a resistive material capable of generating Joule heating under an electric current. Suitable resistive materials include, but are not limited to: semiconductors, such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metallic materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, constantan, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as nickel-, iron-, and cobalt-based superalloys, stainless steel, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys. In composite materials, the resistive material may be embedded in, encapsulated by, or coated with an insulating material, or vice versa, depending on the energy transfer kinetics and desired external physicochemical properties. The heating layer 11 may include a metal etched foil that acts as an insulator between the two inert materials. In this case, the inert material may include polyimide or mica foil, etc.

[0065] In some embodiments, the heating layer 11 includes a sensor. As used herein, the term "sensor" refers to a material capable of converting electromagnetic energy into heat. When located within a changing electromagnetic field, eddy currents induced in the sensor cause heating of the sensor. In such embodiments, the sensor is designed to engage with an aerosol generating device including a magnetic field generator. The magnetic field generator generates a changing magnetic field to heat the sensor located within the changing magnetic field. In use, the sensor is located within the changing magnetic field generated by the magnetic field generator. The magnetic field generator is electrically connected to a power supply assembly that provides current to the magnetic field generator to produce the changing magnetic field. The magnetic field generator may include one or more induction coils that generate the changing magnetic field, and the one or more induction coils may surround the sensor. In one embodiment, the aerosol generating device is capable of generating a changing magnetic field between 1 and 30 MHz, for example between 2 and 10 MHz, for example between 5 and 7 MHz. In one embodiment, the aerosol generating device is capable of generating a magnetic field with a field strength (H field) varying between 1 and 5 kA / m, for example between 2 and 3 kA / m, such as about 2.5 kA / m.

[0066] The sensor may comprise a metal or carbon. In some embodiments, the sensor may comprise a ferromagnetic material, such as ferrite, ferromagnetic steel, or stainless steel. In some embodiments, the sensor comprises a nickel-iron alloy. In one embodiment, the sensor comprises 400 series stainless steel, which includes grade 410, 420, or 430 stainless steel. Different materials will dissipate different amounts of energy when positioned within an electromagnetic field with similar frequency and field strength values. Therefore, the parameters of the sensor, such as material type, length, width, and thickness, can all be varied to provide the desired power dissipation within a known electromagnetic field.

[0067] In some embodiments, the heating layer 11 includes an infrared electrothermal coating. The infrared electrothermal coating can generate heat energy when energized, thereby generating infrared radiation of a certain wavelength, for example, infrared radiation with a wavelength of 0.75 μm to 1000 μm. Optionally, it can generate far-infrared radiation with a wavelength of 1.5 μm to 400 μm. Further optionally, it can generate far-infrared radiation with a wavelength of 8 μm to 15 μm. The infrared electrothermal coating can optionally be formed by thoroughly mixing far-infrared electrothermal ink, ceramic powder, and inorganic binder, then coating it onto the outer surface of a substrate, and then drying and curing it for a certain period of time, with a thickness of 30 μm to 50 μm. Alternatively, the infrared electrothermal coating can also be formed by mixing tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride, and anhydrous copper sulfate in a certain proportion and then coating it onto the outer surface of the substrate; or it can be a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer, or a zirconium-titanium nitride ceramic layer. The coating may be one of the following: ceramic layer, zirconium-titanium boride ceramic layer, zirconium-titanium carbide ceramic layer, iron oxide ceramic layer, iron nitride ceramic layer, iron boride ceramic layer, iron carbide ceramic layer, rare earth oxide ceramic layer, rare earth nitride ceramic layer, rare earth boride ceramic layer, rare earth carbide ceramic layer, nickel-cobalt oxide ceramic layer, nickel-cobalt nitride ceramic layer, nickel-cobalt boride ceramic layer, nickel-cobalt carbide ceramic layer, or high-silicon molecular sieve ceramic layer; the infrared electrothermal coating may also be other existing material coatings.

[0068] In some embodiments, the heating layer 11 is formed on the substrate 12 by means of printing, coating, deposition, electroplating, particle sputtering or ion implantation.

[0069] In some embodiments, the heating layer 11 may exist independently of the substrate, thereby being able to be joined to the substrate by means of clamping, binding, pasting, or at least partial fitting.

[0070] In some embodiments, reference may be made to Figures 3-5 The heating layer 11 has multiple layers, and the multiple heating layers 11 are disposed on the substrate at intervals. Furthermore, the heating layers 11 extend longitudinally, and the multiple heating layers 11 are distributed circumferentially along the substrate. In such a case... Figure 4 and Figure 8 In the illustrated embodiment, multiple heating layers 11 extending longitudinally are distributed circumferentially along the tubular substrate 12 at intervals. This not only gives the heating layers 11 a simple structural shape, but also helps to reduce the temperature difference of the heating layers 11 in the longitudinal direction.

[0071] In some embodiments, when the heating assembly 1 includes a tubular substrate 12, the tubular substrate 12 has a proximal end and a distal end arranged opposite to each other in the longitudinal direction, and the aerosol generating article 200 is assembled into the receiving cavity 121 from the proximal end of the tubular substrate 12. The aerosol generating device 100 also includes an upper end cap connected to the proximal end of the tubular substrate 12 and a lower end cap connected to the distal end of the tubular substrate 12. The upper end cap is provided with an insertion port for inserting the aerosol generating article 200 into the aerosol generating device, and the lower end cap is provided with an air inlet for allowing airflow to enter the interior of the tubular substrate 12. As a result, the heat dissipation rate at the proximal and distal ends of the heating assembly 1 is higher than the heat dissipation rate in the middle region of the heating assembly 1 in the longitudinal direction, so heat is more likely to accumulate in the middle region of the heating assembly 1 in the longitudinal direction, and the aerosol generating matrix disposed in the middle region of the heating assembly 1 is more likely to be overheated or even burnt.

[0072] In the embodiments provided in this application, a plurality of heating layers 11 extending longitudinally are spaced apart and distributed circumferentially along the tubular substrate 12, resulting in blank areas not covered by heating layers 11 between adjacent heating layers 11. The tubular substrate 12 corresponding to these blank areas can exchange heat with the heating layers 11 through heat transfer. This allows it to absorb some of the heat released from the higher-temperature areas of the heating layers 11, thereby accelerating heat dissipation in the middle region of the heating layers 11 longitudinally and slowing down heat dissipation at the ends of the heating layers 11 longitudinally. This helps reduce the heat density and temperature in the middle region of the tubular substrate 12 longitudinally, preventing over-baking or even scorching of the aerosol-generating matrix in the middle region of the tubular substrate 12 longitudinally. It also helps increase the heat density and temperature at the ends of the tubular substrate 12 longitudinally. This reduces the temperature difference of the heating layers longitudinally and facilitates a uniform distribution of heat along the longitudinal direction of the heating layers 11.

[0073] It should be noted that, as used in this article, "multiple" refers to two or more quantities; in other words, "multiple" means at least two.

[0074] In some embodiments, the number A of heating layers 11 satisfies: 2 ≤ A ≤ 15, or 6 ≤ A ≤ 10. In such cases... Figure 4 In the example shown, A = 8.

[0075] In some embodiments, reference may be made to Figure 3 At least two heating layers 11 have the same longitudinal extension length B1. Furthermore, all heating layers 11 have the same longitudinal extension length B1.

[0076] In some embodiments, reference may be made to Figure 4The ratio B of the longitudinal extension length B1 of at least one heating layer 11 to the longitudinal length B2 of the tubular substrate 12 satisfies: 0.6 ≤ B ≤ 1, or 0.8 ≤ B ≤ 1. Further, the ratio B′ of the longitudinal extension length B1 of at least one heating layer 11 to the longitudinal length B′ of the receiving cavity 121 satisfies: 0.6 ≤ B′ ≤ 1, or 0.8 ≤ B′ ≤ 1. Preferably, 0.9 ≤ B′ ≤ 1.

[0077] Understandably, in some examples, a portion of the internal space of the tubular substrate 12 is a receiving cavity for accommodating the aerosol generating article 200, while the remaining space is a non-receiving cavity space not used to accommodate the aerosol generating article 200. In some examples, a portion of the internal space of the tubular substrate 12 is primarily or entirely a receiving cavity 121 for accommodating the aerosol generating article 200.

[0078] In some embodiments, reference may be made to Figure 4 The width C of the heating layer 11 satisfies the following conditions: 0.5mm ≤ C ≤ 3mm, or 1mm ≤ C ≤ 2mm. For example, the width C of the heating layer 11 can be approximately 1.5mm. This is to prevent the heating layer 11 from being too wide, which would cause excessive heat to accumulate in the middle region of the heating layer 11 or the tubular substrate 12 in the longitudinal direction. This helps to ensure that the heat is evenly distributed in the longitudinal direction of the heating assembly 1 and helps to reduce the temperature difference in the longitudinal direction of the heating assembly 1. At the same time, it also prevents the heating layer 11 from being too narrow, which would result in a small heat exchange area between the heating layer 11 and the tubular substrate 12, leading to low heating efficiency of the heating assembly 1.

[0079] In some embodiments, reference may be made to Figure 4 The ratio D of the diameter of the tubular substrate 12 to the width C of the heating layer 11 satisfies: 2≤D≤10, or 3≤D≤8. This helps to distribute heat more evenly in both the longitudinal and transverse directions of the heating component 1.

[0080] In some embodiments, reference may be made to Figure 4 At least two heating layers 11 have the same width C. Furthermore, all heating layers 11 have the same width C.

[0081] In some embodiments, at least two heating layers 11 have the same thickness. Further, all heating layers 11 have the same thickness.

[0082] In some embodiments, at least two heating layers 11 have the same resistance value. Furthermore, all heating layers 11 have the same resistance value, so that at least two heating layers 11 have the same heating power when subjected to the same current or voltage. Furthermore, all heating layers 11 have the same resistance. In some embodiments, at least two heating layers 11 have the same resistivity, so that the heat distribution on at least two heating layers 11 is the same when subjected to the same current or voltage. Furthermore, all heating layers 11 have the same resistivity.

[0083] In some embodiments, the spacing E between two adjacent heating layers 11 satisfies: 0.5mm ≤ E ≤ 3mm, or 1mm ≤ E ≤ 2mm. For example, the spacing E between two adjacent heating layers 11 can be approximately 1.5mm. This is to prevent E from being too wide, which would result in a large temperature difference in the circumferential direction of the heating assembly 1. At the same time, it also prevents E from being too narrow, which would cause excessive heat to accumulate in the middle region of the heating layer 11 or the tubular substrate 12 in the longitudinal direction.

[0084] In some embodiments, the spacing E between two adjacent heating layers 11 is less than or equal to the width C of the heating layer 11.

[0085] In some embodiments, a plurality of heating layers 11 are uniformly distributed circumferentially along the tubular substrate 12. Thus, the plurality of heating layers 11 have the same width C, the same longitudinal extension length B1, the same thickness, and the spacing E between any two adjacent heating layers 11 is equal. This results in a more uniform temperature field in the circumferential direction for the heating assembly 1 or the tubular substrate 12, helping to reduce the temperature difference in the circumferential direction of the heating assembly 1 or the tubular substrate 12.

[0086] In some embodiments, the heating assembly 1 further includes a first electrode layer 13 extending circumferentially along the tubular substrate 12 and electrically connected to a plurality of heating layers 11. The electrode layer is used to electrically connect the power supply 2 and the heating layers 11, thereby enabling the power supply 2 to provide electrical power to the heating layers 11.

[0087] In some embodiments, reference may be made to Figure 5 The tubular substrate 12 has a proximal end and a distal end disposed opposite to each other in the longitudinal direction, and the first electrode layer 13 is electrically connected to the ends of the plurality of heating layers 11 disposed adjacent to the proximal end of the tubular substrate 12.

[0088] The heating assembly 1 may also include multiple independent electrode layers (not shown), which are electrically connected to the ends of multiple heating layers 11 located adjacent to the distal ends of the tubular substrate 12, thereby enabling the multiple heating layers 11 to release heat independently or to independently control the heat release of the multiple heating layers 11.

[0089] In some embodiments, reference may be made to Figure 5 The heating assembly 1 also includes a second electrode layer 14 that is longitudinally spaced from the first electrode layer 13. The second electrode layer 14 extends circumferentially along the tubular substrate 12 and is electrically connected to multiple heating layers 11.

[0090] Furthermore, the second electrode layer 14 is electrically connected to the ends of the plurality of heating layers 11 disposed adjacent to the distal ends of the tubular substrate 12.

[0091] In some embodiments, reference may be made to Figure 3 and Figure 5 The heating assembly 1 further includes a first common electrode layer 15 disposed between the first electrode layer 13 and the second electrode layer 14. The first common electrode layer 15 extends circumferentially along the tubular substrate 12 and is electrically connected to a plurality of heating layers 11, such that at least a portion of the heating layers 11 includes a first heating portion 111 electrically connected between the first electrode layer 13 and the first common electrode layer 15 and a second heating portion 112 electrically connected between the second electrode layer 14 and the first common electrode layer 15.

[0092] Thus, the heating component 1 has at least a first heating region 17 and a second heating region 18, which are arranged longitudinally and located on opposite sides of the first common electrode layer 15. Since the resistivity of the electrode layer is less than that of the heating layer 11, the region of the heating component 1 with the first common electrode layer 15 located between the first heating region 17 and the second heating region 18 has a lower heating efficiency; in other words, the heating efficiency of the region of the heating component 1 with the first common electrode layer 15 is less than that of the first heating region 17 and the second heating region 18. Therefore, the temperature field distribution of the heating component 1 in the longitudinal direction can be set by setting the position and width of the first common electrode layer 15. In one example, the width of the first common electrode 15 is approximately the same as the width of the heating layer 11.

[0093] In some embodiments, the first heating element 111 and the second heating element 112 have the same longitudinal extension length. Thus, the first common electrode layer 15 is located at the midpoint between the first electrode layer 13 and the second electrode layer 14, or the first common electrode layer 15 is connected to the heating layer 11 at the midpoint of its longitudinal direction. Further, the first common electrode layer 15 is located at the midpoint of the tubular substrate 12 or the heating assembly 1 in its longitudinal direction.

[0094] Of course, in other embodiments, the longitudinal extension length of the first heating part 111 is different from the longitudinal extension length of the second heating part 112.

[0095] In some embodiments, the first heating zone 17 is generally annular, capable of surrounding the receiving cavity 121 by at least 300°, and a plurality of first heating elements 111 extending longitudinally are distributed circumferentially in the first heating zone 17 at intervals. Preferably, the plurality of first heating elements 111 are evenly distributed in the first heating zone 17, thereby giving the first heating zone 17 a relatively uniform temperature field in both the longitudinal and transverse directions. The plurality of first heating elements 111 can be connected in parallel between the first electrode layer 13 and the first common electrode layer 15.

[0096] In some embodiments, the second heating zone 18 is generally annular, capable of surrounding the receiving cavity 121 by at least 300°, and a plurality of second heating elements 112 extending longitudinally are distributed circumferentially in the second heating zone 18 at intervals. Preferably, the plurality of second heating elements 112 are evenly distributed in the second heating zone 18, thereby giving the second heating zone 18 a relatively uniform temperature field in both the longitudinal and transverse directions. The plurality of second heating elements 112 may be connected in parallel between the second electrode layer 14 and the first common electrode layer 15.

[0097] In some embodiments, the first electrode layer 13 and the second electrode layer 14 are electrically connected to the same electrode of the power supply 2, while the first common electrode layer 15 is electrically connected to the other electrode of the power supply 2. This allows the first heating zone 17 and the second heating zone 18 to be independently controlled for heating, or allows the first heating zone 17 and the second heating zone 18 to independently release heat, including but not limited to: allowing either the first heating zone 17 or the second heating zone 18 to release heat, allowing the first heating zone 17 and the second heating zone 18 to release heat simultaneously, allowing the first heating zone 17 and the second heating zone 18 to release heat at different temperatures, or allowing the first heating zone 17 and the second heating zone 18 to release heat in a preset order.

[0098] Of course, in other embodiments, the first electrode layer 13 can be electrically connected to one electrode of the power supply 2, and the second electrode layer 14 and the first common electrode layer 15 can both be electrically connected to the other electrode of the power supply 2, but the second electrode layer 14 and the first common electrode layer 15 are configured not to be electrically connected to the power supply 2 at the same time.

[0099] In some embodiments, reference may be made to Figure 8The heating assembly 1 further includes a second common electrode layer 16 disposed between the second electrode layer 14 and the first common electrode layer 15. The second common electrode layer 16 extends circumferentially along the tubular substrate 12 and is electrically connected to multiple heating layers 11, such that at least some of the heating layers 11 also include a third heating portion 113 electrically connected between the second electrode layer 112 and the second common electrode layer 16. The second heating portion 112 is electrically connected between the first common electrode layer 15 and the second common electrode layer 16. This results in the heating assembly 1 also having a third heating region 19. The second heating region 18 is located between the first common electrode layer 15 and the second common electrode layer 16, and the third heating region 19 is located between the second common electrode layer 16 and the second heating layer 14. In this embodiment, the longitudinal position and / or longitudinal extension length of the second heating region 18 can affect the longitudinal temperature field distribution of the heating assembly 1. Alternatively, the longitudinal temperature field distribution of the heating assembly 1 can be set by setting the longitudinal position of the second common electrode layer 16 and by setting the width of the second common electrode layer 16.

[0100] In some embodiments, the first heating zone 17, the second heating zone 18, and the third heating zone 19 have the same longitudinal extension length, that is, the first heating part 111, the second heating part 112, and the third heating part 113 have the same longitudinal extension length.

[0101] In some embodiments, the third heating zone 19 is generally annular, capable of surrounding the receiving cavity 121 by at least 300°, and a plurality of third heating elements 113 extending longitudinally are distributed circumferentially in the third heating zone 19 at intervals. Preferably, the plurality of third heating elements 113 are evenly distributed in the third heating zone 19, thereby giving the third heating zone 19 a relatively uniform temperature field in both the longitudinal and transverse directions. The plurality of third heating elements 113 may be connected in parallel between the second electrode layer 14 and the second common electrode layer 16.

[0102] In some embodiments, the first electrode layer 13 and the second common electrode layer 16 are electrically connected to the same electrode of the power supply 2, while the second electrode layer 14 and the first common electrode layer 15 are electrically connected to the other electrode of the power supply 2. This allows the first heating zone 17 and the second heating zone 18 to be heated independently, or allows the first heating zone 17 and the second heating zone 18 to release heat independently.

[0103] Of course, in other embodiments, the first electrode layer 13 can be electrically connected to one electrode of the power supply 2, and the second electrode layer 14, the first common electrode layer 15, and the second common electrode layer 16 can all be electrically connected to the other electrode of the power supply 2, but the second electrode layer 14, the first common electrode layer 15, and the second common electrode layer 16 are configured not to be electrically connected to the power supply 2 at the same time.

[0104] In some embodiments, reference may be made to Figure 5 The tubular substrate 12 includes a first tubular substrate 122 formed by winding a first cast sheet 122' and a second tubular substrate 123 formed by winding a second cast sheet 123', the second tubular substrate 123 being disposed around at least partially on the periphery of the first tubular substrate 122. At least a portion of the heating layer 11, or at least a portion of the heating layer 11, is disposed between the first tubular substrate 122 and the second tubular substrate 123.

[0105] At least a portion of the multiple heating layers 11, or at least a portion of one or more heating layers 11, can be disposed on the first cast sheet 122' or the second cast sheet 123', and then the first cast sheet 122' or the second cast sheet 123' can be wound around it to form the first tubular substrate 122 or the second tubular substrate 123. Alternatively, at least a portion of the multiple heating layers 11, or at least a portion of one or more heating layers 11, can be superimposed between the first cast sheet 122' and the second cast sheet 123', and then wound together around the first cast sheet 122' and the second cast sheet 123' to simultaneously form the first tubular substrate 122 and the second tubular substrate 123.

[0106] Preferably, after at least a portion of the multiple heating layers 11, or at least a portion of one or more heating layers 11, are disposed on the first casting sheet 122' and / or the second casting sheet 123', the first casting sheet 122' and the second casting sheet 123' are then stacked, and then the first casting sheet 122' and the second casting sheet 123' are wound together to simultaneously form the first tubular substrate 122 and the second tubular substrate 123.

[0107] More preferably, the first cast sheet 122' and the second cast sheet 123' are stacked on top of each other and appropriately offset in the lateral direction, for example, the offset distance L can be about 1 mm, so that the first tubular substrate 122 formed by winding the first cast sheet 122' has a first joint 1221 extending in the longitudinal direction, and the second tubular substrate 123 formed by winding the second cast sheet 123' has a second joint 1231 extending in the longitudinal direction. The first joint 1221 and the second joint 1231 are offset in the circumferential direction of the tubular substrate 12, and the circumferential offset distance between them can be about 1 mm.

[0108] The first joint 1221 is formed by joining the two sides of the first cast sheet 122′ in the circumferential direction, so that the two sides of the first cast sheet 122′ are arranged face-to-face on the first tubular substrate 122 in the circumferential direction. The second joint 1231 is formed by joining the two sides of the second cast sheet 123′ in the circumferential direction, so that the two sides of the second cast sheet 123′ are arranged face-to-face on the second tubular substrate 123 in the circumferential direction.

[0109] Preferably, the first casting sheet 122' and the second casting sheet 123' can be bonded together before winding the first casting sheet 122' and the second casting sheet 123'.

[0110] The cast sheet may include a ceramic thin film or a ceramic cast sheet. Preferably, the cast sheet includes silicon nitride ceramic, or other materials with a thermal conductivity greater than 10 W / (m·K) to improve the thermal conductivity of the cast sheet.

[0111] In some embodiments, at least a portion of the first electrode layer 13 is exposed outside the second tubular substrate 122, thereby facilitating electrical connection of the first electrode layer 13 to a wire or conductive terminal.

[0112] For example, the first electrode layer 13 is completely outside the coverage area of ​​the second tubular substrate 122.

[0113] Or, for example, a portion of the first electrode layer 13 is located between the first tubular substrate 122 and the second tubular substrate 123 and is thus covered by the second tubular substrate 123, while a portion of the first electrode layer 13 is exposed outside the second tubular substrate 123. Further, refer to... Figure 3 A first through hole 1232 is formed on the second tubular substrate 123. The first through hole 1232 is disposed corresponding to a local area of ​​the first electrode layer 13, so that the local area of ​​the first electrode layer 13 is exposed through the first through hole 1232. Further, see... Figure 5 The first through hole 1232 is disposed in the middle region of the first electrode layer 13 in the circumferential direction, so that at least a portion of the middle region of the first electrode layer 13 is exposed.

[0114] In some embodiments, at least a portion of the second electrode layer 14 is exposed outside the second tubular substrate 123, thereby facilitating electrical connection of the second electrode layer 14 to a wire or conductive terminal.

[0115] For example, the second electrode layer 14 is completely outside the coverage area of ​​the second tubular substrate 123.

[0116] Or, for example, a portion of the second electrode layer 14 is located between the first tubular substrate 122 and the second tubular substrate 123 and is thus covered by the second tubular substrate 123, while a portion of the second electrode layer 14 is exposed outside the second tubular substrate 123. Further, refer to... Figure 3 A second through hole 1233 is formed on the second tubular substrate 123. The second through hole 1233 is disposed corresponding to a local area of ​​the second electrode layer 14, so that the local area of ​​the second electrode layer 14 is exposed through the second through hole 1233. Further, refer to... Figure 5 The second through hole 1233 is provided in the middle region of the second electrode layer 14 in the circumferential direction, so that at least a part of the middle region of the second electrode layer 14 is exposed.

[0117] In some embodiments, at least a portion of the first common electrode layer 15 is exposed outside the second tubular substrate 123, thereby facilitating electrical connection of the first common electrode layer 15 to a wire or conductive terminal.

[0118] For example, the first common electrode layer 15 is completely outside the coverage area of ​​the second tubular substrate 123.

[0119] Or, for example, a portion of the first common electrode layer 15 is located between the first tubular substrate 122 and the second tubular substrate 123 and is thus covered by the second tubular substrate 123, while a portion of the first common electrode layer 15 is exposed outside the second tubular substrate 123. Further, refer to... Figure 3 A third through hole 1234 is formed on the second tubular substrate 123. The third through hole 1234 is disposed corresponding to a local area of ​​the first common electrode layer 15, so that the local area of ​​the first common electrode layer 15 is exposed through the third through hole 1234. Further, refer to... Figure 5 The third through hole 1234 is disposed in the middle region of the first common electrode layer 15 in the circumferential direction, so that at least a portion of the middle region of the first common electrode layer 15 is exposed.

[0120] In some embodiments, reference may be made to Figure 2 The proximal end of the tubular substrate 12 has an outwardly expanding guide surface 124 to guide the aerosol-generating article 200 into the receiving cavity 121, thereby facilitating the smooth insertion of the aerosol-generating article 200 into the receiving cavity 121.

[0121] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A heating assembly, characterized by, The application relates to a heating element for an aerosol-generating article, comprising: a tubular base body having an accommodation cavity extending in a longitudinal direction inside the tubular base body, the accommodation cavity being configured to accommodate at least a part of an aerosol-generating article; and a plurality of heating layers extending in the longitudinal direction and arranged on the tubular base body at intervals from each other and distributed in a circumferential direction of the tubular base body, the heating layers being configured to release heat to heat the aerosol-generating article. The plurality of heating layers are uniformly distributed on the tubular base body.

2. The heating assembly of claim 1, wherein, The number A of the heating layers satisfies 2<=A<=15 or 6<=A<=10.

3. The heating assembly of claim 1, wherein, The ratio B of a longitudinal extension length of at least one of the heating layers to a longitudinal length of the tubular base body satisfies 0.6<=B<=1 or 0.8<=B<=1; and / or 4. The heating assembly of claim 1, wherein, At least two of the heating layers have the same longitudinal extension length. The heating layers satisfy at least one of the following conditions:

5. The heating assembly of claim 1, wherein, At least two of the heating layers have the same width. The width C of the heating layers satisfies 0.5mm<=C<=3mm or 1mm<=C<=2mm. The ratio D of a diameter of the tubular base body to the width of the heating layers satisfies 2<=D<=10 or 3<=D<=8. The spacing E between two adjacent heating layers satisfies 0.5mm<=E<=3mm or 1mm<=E<=2mm; and The spacing between two adjacent heating layers is less than or equal to the width of the heating layers. The application further comprises a first electrode layer extending in the circumferential direction of the tubular base body and electrically connected to the plurality of heating layers.

6. The heating assembly of claim 1, wherein, The tubular base body has a proximal end and a distal end arranged opposite to each other in the longitudinal direction, and the first electrode layer is electrically connected to an end portion of the plurality of heating layers adjacent to the proximal end.

7. The heating assembly of claim 6, wherein, The application further comprises a second electrode layer arranged at intervals from the first electrode layer in the longitudinal direction, the second electrode layer extending in the circumferential direction of the tubular base body and electrically connected to the plurality of heating layers.

8. The heating assembly of claim 6, wherein, The application further comprises a first common electrode layer arranged between the first electrode layer and the second electrode layer, the first common electrode layer extending in the circumferential direction of the tubular base body and electrically connected to the plurality of heating layers, so that at least part of the heating layers comprise a first heating portion electrically connected between the first electrode layer and the first common electrode layer and a second heating portion electrically connected between the second electrode layer and the first common electrode layer.

9. The heating assembly of claim 8, wherein, The first heating portion and the second heating portion have the same longitudinal extension length.

10. The heating assembly of claim 9, wherein, The tubular base body comprises a first tubular base body formed by winding a first flow cast sheet and a second tubular base body formed by winding a second flow cast sheet, the second tubular base body being arranged around at least a part of a periphery of the first tubular base body, at least part of the heating layers or at least a part of the heating layers being arranged between the first tubular base body and the second tubular base body, and at least a part of the first electrode layer being exposed outside the second tubular base body.

11. The heating assembly of claim 6, wherein, The second tubular base body is provided with a first through hole corresponding to a middle region of the first electrode layer in the circumferential direction, so that at least part of the middle region of the first electrode layer is exposed.

12. The heating assembly of claim 11, wherein, ​ 13. The heating assembly of claim 11, wherein, The first tubular base body has a first seam extending in the longitudinal direction, the first seam being formed by butt joint of two side edges of the first cast sheet in the circumferential direction; The second tubular base body has a second seam extending in the longitudinal direction, the second seam being formed by butt joint of two side edges of the second cast sheet in the circumferential direction; The first seam and the second seam are arranged staggered in the circumferential direction of the tubular base body.

14. The heating assembly of claim 1, wherein, The tubular base body has a proximal end and a distal end arranged opposite in the longitudinal direction, the proximal end having a guide surface extending outwardly and expanding to guide the aerosol generating article into the accommodation cavity.

15. The heating assembly of claim 1, wherein, The heating layer is formed on the tubular base body by printing, coating, deposition, electroplating, particle sputtering or ion implantation.

16. An aerosol-generating device comprising: The heating assembly comprises a power supply assembly configured to output electric power to heat the aerosol generating article.

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