Heating module and aerosol generating device

Abstract

The utility model provides a heating module and an aerosol generating device, the heating module comprises a base material, the base material is provided with a first end and a second end which are oppositely arranged, and the direction where the first end and the second end are located is a first direction; the first heating layer is arranged on the base material; the second heating layer is arranged on the side, away from the base material, of the first heating layer; the first heating layer and the second heating layer are at least partially overlapped, and at least one of the first heating layer and the second heating layer is arranged at the first end, so that the aerosol generating product corresponding to the first end of the heating module can smoke first; under the same heating power, the first end of the heating module is heated in a concentrated manner, so that the aerosol generating product corresponding to the first end of the heating module can quickly reach the fuming temperature to generate more smoke; the problems that the aerosol concentration is reduced in the later smoking process due to one-time uniform heating of the heating module, and the taste is not consistent before and after are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerosol generation, in particular to an aerosol generation device and a heating module. BACKGROUND

[0002] The heat-not-burn aerosol generation device includes a heating module, which makes the aerosol generation article generate aerosol for a user to smoke in a heated but not combusted manner.

[0003] In the past heat-not-burn aerosol generation device, the heating module is heated as a whole, and the temperature field distribution of the heating module cannot be accurately controlled, so that the temperature of the first few puffs of smoke is too high, the smoke amount is small, and the consistency of aerosol in the front and back puffs of smoke is poor. CONTENT OF THE UTILITY MODEL

[0004] To solve the problem that the temperature field of the heating module cannot be accurately controlled during the user's smoking process.

[0005] The present application provides a heating module, comprising: a substrate, the substrate having a first end and a second end arranged oppositely, the direction in which the first end and the second end are located being a first direction; a first heating layer arranged on the substrate; and a second heating layer arranged on the side of the first heating layer away from the substrate; the first heating layer and the second heating layer at least partially overlap, and at least one of the first heating layer and the second heating layer is arranged at the first end.

[0006] The present application provides a heating module, the substrate includes a support tube, the support tube defines a heating cavity for accommodating an aerosol generation article and an insertion port for the aerosol generation article to be inserted, one end of the support tube close to the insertion port being the first end, and one end of the support tube away from the insertion port being the second end.

[0007] The present application provides a heating module, the first heating layer surrounds the substrate; and / or the second heating layer surrounds the first heating layer.

[0008] The present application provides a heating module, when the first heating layer is closer to the first end than the second heating layer, the length of the first heating layer in the first direction is less than or equal to the length of the second heating layer; and when the second heating layer is closer to the first end than the first heating layer, the length of the second heating layer in the first direction is less than or equal to the length of the first heating layer.

[0009] The present application provides a heating module, when the first heating layer is closer to the first end than the second heating layer, the projection of the first heating layer on the second heating layer is located within the second heating layer.

[0010] The heating module provided by the present application is characterized in that: when the second heating layer is closer to the first end than the first heating layer, the projection of the second heating layer on the first heating layer is located in the first heating layer.

[0011] The heating module provided by the present application is characterized in that: a first insulating layer is arranged between the substrate and the first heating layer; and / or a second insulating layer is arranged between the first heating layer and the second heating layer.

[0012] The heating module provided by the present application is characterized in that: at least one of the first heating layer and the second heating layer is an electric resistance heating body.

[0013] The heating module provided by the present application is characterized in that: when the first heating layer is closer to the first end than the second heating layer, the length of the first heating layer perpendicular to the first direction is greater than the length of the second heating layer perpendicular to the first direction; and / or when the second heating layer is closer to the first end than the first heating layer, the length of the second heating layer perpendicular to the first direction is greater than the length of the first heating layer perpendicular to the first direction.

[0014] The heating module provided by the present application is characterized in that: at least one of the first heating layer and the second heating layer is an infrared heating coating.

[0015] The heating module provided by the present application is characterized in that: at least one of the first heating layer and the second heating layer is a susceptor.

[0016] The aerosol generating device provided by the present application is characterized in that: the device comprises a battery assembly and the heating module described above, and the battery assembly provides electric energy for the heating module.

[0017] At least one of the first heating layer and the second heating layer of the heating module provided by the present application is arranged at the first end, so that the aerosol generating article corresponding to the first end of the heating module can smoke first; under the same heating power, the first end of the heating module concentrates heat, so that the aerosol generating article corresponding to the first end of the heating module can quickly reach the smoking temperature to generate more smoke; and the problem of inconsistent taste before and after smoking caused by the decline of aerosol concentration in the later smoking process due to the uniform heating of the heating module at one time is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document, these illustrative examples do not limit the embodiments and elements in the figures with the same reference numerals indicate similar elements unless otherwise specified, the figures do not constitute a proportional limit.

[0019] Figure 1 Schematic diagram of a heating module according to an embodiment of the application;

[0020] Figure 2 Schematic diagram of a heating module according to an embodiment of the application;

[0021] Figure 3 Schematic diagram of a heating module according to an embodiment of the application;

[0022] Figure 4 Schematic diagram of a heating module according to an embodiment of the application;

[0023] Figure 5 Schematic diagram of a heating module according to an embodiment of the application;

[0024] Figure 6 Schematic diagram of an aerosol-generating device according to an embodiment of the application.

[0025] In the drawings:

[0026] 10. Heating module;

[0027] 1. Base material; 11. First end; 12. Second end; 13. Support tube; 131. Heating chamber; 132. Insertion opening;

[0028] 2. First heating layer;

[0029] 3. Second heating layer;

[0030] 4. First insulating layer;

[0031] 5. Second insulating layer;

[0032] 20. Aerosol-generating article; 201. Filter segment; 202. Smoking segment;

[0033] 30. Battery assembly;

[0034] 100. Aerosol-generating device. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0036] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying the quantity or order of the indicated technical features relative to their importance. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0037] 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.

[0038] 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.

[0039] This application provides a heating module 10, such as Figures 1-3 As shown, the system includes: a substrate 1, a first heating layer 2, and a second heating layer 3. The substrate 1 has a first end 11 and a second end 12 disposed opposite to each other, with the direction of the first end 11 and the second end 12 being a first direction x. The first heating layer 2 is disposed on the substrate 1. The second heating layer 3 is disposed on the side of the first heating layer 2 away from the substrate 1. The first heating layer 2 and the second heating layer 3 at least partially overlap, and at least one of the first heating layer 2 and the second heating layer 3 is disposed at the first end 11.

[0040] At least one of the first heating layer 2 and the second heating layer 3 of the heating module 10 of this application is disposed at the first end 11, so that the first end 11 of the heating module 10 is heated preferentially, so that the aerosol generating product 20 corresponding to the first end 11 of the heating module 10 can emit smoke first; under the same heating power, the first end 11 of the heating module 10 heats up in a concentrated manner, so that the aerosol generating product 20 corresponding to the first end 11 of the heating module 10 can quickly reach the smoke generation temperature and generate a large amount of smoke; this avoids the problem that the aerosol concentration decreases during the later inhalation process due to the uniform heating of the heating module 10 at one time, resulting in inconsistent taste before and after.

[0041] In one embodiment of this application, the substrate 1 can be sheet-like, tubular, or cylindrical. Correspondingly, the heating module 10 can be a sheet-like or cylindrical heating needle. The heating module 10 is inserted into the aerosol generating article 20 to generate aerosol for the user to inhale by heating but not burning. In this method, the heating module 10 heats the aerosol generating article 20 from the center. Alternatively, the heating module 10 can be tubular, with the aerosol generating article 20 inserted into the heating cavity 131 of the tubular heating module 10, and the heating module 10 heats the aerosol generating article 20 circumferentially.

[0042] In one embodiment of this application, such as Figure 3 As shown, the substrate 1 includes a support tube 13, which defines a heating chamber 131 for accommodating the aerosol generating article and an insertion port 132 for inserting the aerosol generating article 20. The end of the support tube 13 near the insertion port 132 is the first end 11, and the end of the support tube 13 away from the insertion port 132 is the second end 12.

[0043] In one embodiment of this application, the end of the aerosol generating article 20 that is inhaled by the user is the proximal end, and the end of the aerosol generating article 20 that is away from the first end is the distal end. The aerosol generating article 20 includes a filter section 201 and a smoke-generating section 202. After the aerosol generating article 20 is inserted into the insertion port 132, the filter section 201 is exposed outside the heating chamber 131 for the user to hold in their mouth for filtering and outputting the aerosol. The filter section 201 typically includes a porous material such as cellulose acetate. The smoke-generating section 202 is inserted into the heating chamber 131, and the heating module 10 heats the smoke-generating section 202 to generate aerosol.

[0044] In one embodiment of the present application, the aerosol generating article 20 has an overall appearance of a longitudinal cylindrical configuration, for example, configured to be a cylindrical shape similar to a cigarette. Alternatively, in yet other variant embodiments, the aerosol generating article 20 can have a longitudinal elliptical cylindrical, square cylindrical, polygonal cylindrical, or the like. In some embodiments, the aerosol generating article 20 can have an appearance that mimics that of a conventional lightable, post-smoking cigarette. The aerosol generating article 20 can have an outer diameter of between approximately 5 millimeters and 12 millimeters, for example, between approximately 5 mm and 10 mm. Further, the aerosol generating article 3 has a total length of between approximately 40 mm and 100 mm, and in alternative embodiments, the aerosol generating article 20 has a total length of approximately 45 mm and 55 mm.

[0045] In one embodiment of the present application, the aerosol generating article 20 includes an aerosol generating substrate; the aerosol generating substrate is used to describe a substrate capable of releasing volatile compounds upon heating, which can form an aerosol. The aerosol described herein can be visible or invisible, and can include a vapor (e.g., fine particles of a substance that are in a gaseous state, which are typically liquids or solids at room temperature), as well as gases and liquid droplets of condensed vapor. The aerosol generating substrate can include, for example, one or more of a powder, a granule, a pellet, a piece, a strand, a strip, or a sheet, which contains one or more of dried flowers or leaves, grass leaves, tobacco leaves, tobacco stems, expanded tobacco, and homogenized tobacco.

[0046] In one embodiment of the present application, at least one of the first heating layer 2 and the second heating layer 3 is disposed at the first end 11, that is, at least one of the first heating layer 2 and the second heating layer 3 is disposed at the side of the smoking section 202 of the aerosol generating article 20 close to the filter 201, so that the portion of the aerosol generating article 20 close to the filter is heated first, which can enable rapid smoking during smoking. Further, at the same heating power, compared to the case where the heating module heats uniformly at one time, the first heating layer 2 or the second heating layer 3 disposed at the side of the smoking section 202 of the aerosol generating article 20 close to the filter 201 can reach the preset temperature first, so that the user can obtain a large amount of aerosol generated at the side of the smoking section 202 of the aerosol generating article 20 close to the filter 201 in the early stage of smoking; in the later stage of smoking, the second end of the heating module 10, that is, the side of the smoking section 202 of the aerosol generating article 20 away from the filter 201, is heated to generate smoke, so that the concentration of the aerosol obtained in the early stage and the later stage of smoking is substantially the same, and the taste of the user before and after smoking is consistent.

[0047] In an embodiment of the present application, the first heat-generating layer 2 surrounds the substrate 1. In an embodiment of the present application, the second heat-generating layer 3 surrounds the first heat-generating layer 2, and both the first heat-generating layer 2 and the second heat-generating layer 3 surround the substrate 1, so that the heating module 10 heats the circumference of the aerosol generating article 20.

[0048] In an embodiment of the present application, the first heat-generating layer 2 and the second heat-generating layer 3 extend along the circumference of the support tube 13.

[0049] In an embodiment of the present application, when the first heat-generating layer 2 is closer to the first end 11 than the second heat-generating layer 3, the length of the first heat-generating layer 2 in the first direction x is less than or equal to the length of the second heat-generating layer 3. In an embodiment of the present application, when the second heat-generating layer 3 is closer to the first end 11 than the first heat-generating layer 2, the length of the second heat-generating layer 3 in the first direction x is less than or equal to the length of the first heat-generating layer.

[0050] In an embodiment of the present application, when the first heat-generating layer 2 is closer to the first end 11 than the second heat-generating layer 3, the projection of the first heat-generating layer 2 on the second heat-generating layer 3 is located within the second heat-generating layer 3.

[0051] In an embodiment of the present application, the first heat-generating layer 2 works first; and / or the first heat-generating layer 2 works with a time delay. In an embodiment of the present application, in the first stage of the operation of the heating module 10, the first heat-generating layer 2 works and the second heat-generating layer 3 does not work, so that the smoking section 202 of the aerosol generating article 20 close to one side of the filter 201 is heated first, and the user can quickly smoke, obtain a larger amount of smoke, and have a consistent taste of aerosol before and after smoking. In an embodiment of the present application, in the second stage of the operation of the heating module 10, the first heat-generating layer 2 and the second heat-generating layer 3 work at the same time, or the first heat-generating element does not work and the second heat-generating layer 3 works, so that the entire aerosol generating article 20 smokes or the smoking section 202 of the aerosol generating article 20 away from one side of the filter 201 smokes. In an embodiment of the present application, in the third stage of the operation of the heating module 10, the first heat-generating layer 2 works and the second heat-generating layer 3 does not work, so that the heating module 10 preheats the aerosol generating article 10, ensuring that the user also obtains a good taste in the later stage of smoking.

[0052] In an embodiment of the present application, as shown in FIG. 1, the heating module 10 comprises a first heat-generating layer 2 and a second heat-generating layer 3. Figure 2As shown, when the second heating layer 3 is closer to the first end 11 than the first heating layer 2, the projection of the second heating layer 3 on the first heating layer 2 is located in the first heating layer 2. In an embodiment of the present application, the second heating layer 3 works, and the first heating layer 2 does not work; and / or the second heating layer 3 works in a time-delay manner. In an embodiment of the present application, in the first stage of the working of the heating module 10, the second heating layer 3 works, and the first heating layer 2 does not work, so that the smoking section 202 of the aerosol generating article 20 is heated on the side close to the filter 201, and the user can smoke quickly, obtain a large amount of smoke, and obtain aerosols with consistent taste in the front and back. In an embodiment of the present application, in the second stage of the working of the heating module 10, the first heating layer 2 and the second heating layer 3 work at the same time, or the second heating layer 3 does not work, and the first heating layer 2 works, so that the whole of the aerosol generating article 20 smokes or the smoking section 202 of the aerosol generating article 20 smokes on the side away from the filter 201. In an embodiment of the present application, in the third stage of the working of the heating module 10, the second heating layer 3 works, and the first heating layer 2 does not work, so that the heating module 10 preheats the aerosol generating article 10, and the user can obtain a good taste in the later stage of smoking.

[0053] In an embodiment of the present application, the first heating layer 2 and the second heating layer 3 work at the same time. At this time, the first heating layer 2 and the second heating layer 3 at least partially overlap, so that the heating amount of the first end 11 of the heating module 10 is greater than the heating amount of the second end 12 of the heating module, so that the smoking section 202 of the aerosol generating article 20 corresponding to the heating module 10 smokes on the side close to the filter 201, and the user can smoke quickly, obtain a large amount of smoke, and obtain aerosols with consistent taste in the front and back

[0054] In an embodiment of the present application, the first heating layer 2 and the second heating layer 3 are flush at the first end 11, when the second heating layer 3 is closer to the first end 11 than the first heating layer 2, in the first direction x, the length of the first heating layer 2 is less than or equal to the length of the second heating layer 3; when the first heating layer 2 is closer to the first end 11 than the second heating layer 3, in the first direction x, the length of the second heating layer 3 is less than or equal to the length of the first heating layer.

[0055] In an embodiment of the present application, the first heating layer 2 is located at the first end 11, the second heating layer 3 is located at the second end 12, and the first heating layer 2 and the second heating layer 3 partially overlap.

[0056] In an embodiment of the present application, the second heating layer 3 is located at the first end 11, the first heating layer 2 is located at the second end 12, and the first heating layer 2 and the second heating layer 3 partially overlap.

[0057] In one embodiment of the present application, the substrate 1 comprises a metal or a ceramic, and the substrate 1 has a certain structural strength to support the first heating layer 2 and the second heating layer 3 arranged on the substrate 1.

[0058] In one embodiment of the present application, a first insulating layer 4 is arranged between the substrate 1 and the first heating layer 2; and / or a second insulating layer 5 is arranged between the first heating layer 2 and the second heating layer 3. The first insulating layer 4 and the second insulating layer 5 can electrically insulate the substrate 1 and the first heating layer 2, the first heating layer 2 and the second heating layer 3. The first insulating layer 4 and the second insulating layer 5 can be arranged on the surface of the substrate 1 or the first heating layer 2 by spraying, wrapping or other processes.

[0059] In one embodiment of the present application, at least one of the first heating layer 2 and the second heating layer 3 is an electrically resistive heating element. When the electrically resistive heating element is supplied with electric power, the electrically resistive heating element can generate Joule heat. Suitable electrically 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 materials and metal materials. Such composite materials can include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbides. 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.

[0060] In one embodiment of the present application, as shown in FIG. 1A, at least one of the first heating layer 2 and the second heating layer 3 is a mesh heating element, including but not limited to a sheet-shaped mesh element or a tubular mesh element. Figure 4

[0061] In one embodiment of the present application, at least one of the first heating layer 2 and the second heating layer 3 can be a heating track formed by coating.

[0062] In one embodiment of the present application, at least one of the first heating layer 2 and the second heating layer 3 can be a heating coil.

[0063] In one embodiment of the present application, as shown in FIG. 1A, at least one of the first heating layer 2 and the second heating layer 3 is a mesh heating element, including but not limited to a sheet-shaped mesh element or a tubular mesh element. Figure 5 ​As shown, the length of the first heating layer 2 perpendicular to the first direction x is greater than the length of the second heating layer 3 perpendicular to the first direction x when the first heating layer 2 is closer to the first end 11 than the second heating layer 3. In an embodiment of the present application, the heating module 10 is a tubular heating body, the length of the first heating layer 2 perpendicular to the first direction x and the length of the second heating layer 3 perpendicular to the first direction x respectively refer to the length of the first heating layer 2 and the second heating layer 3 after being unfolded, and when the length of the first heating layer 2 perpendicular to the first direction x is greater than the length of the second heating layer 3 perpendicular to the first direction x, the conductive pins at both ends of the first heating layer 2 are located between the conductive pins at both ends of the second heating layer 3 after the first heating layer 2 and the second heating layer 3 are wrapped around the substrate 1, so that the conductive pins of the first heating layer 2 and the conductive pins of the second heating layer 3 do not interfere with each other when being led out.

[0064] In an embodiment of the present application, (not shown in the figure) the length of the second heating layer 3 perpendicular to the first direction x is greater than the length of the first heating layer 2 perpendicular to the first direction x when the second heating layer 3 is closer to the first end 11 than the first heating layer 2. In an embodiment of the present application, the heating module 10 is a tubular heating body, the length of the second heating layer 3 perpendicular to the first direction x and the length of the first heating layer 2 perpendicular to the first direction x respectively refer to the length of the first heating layer 2 and the second heating layer 3 after being unfolded, and when the length of the second heating layer 3 perpendicular to the first direction x is greater than the length of the first heating layer 2 perpendicular to the first direction x, the conductive pins at both ends of the second heating layer 3 are located between the conductive pins at both ends of the first heating layer 2 after the first heating layer 2 and the second heating layer 3 are wrapped around the substrate 1, so that the conductive pins of the second heating layer 3 and the conductive pins of the first heating layer 2 do not interfere with each other when being led out.

[0065] In one embodiment of the application, at least one of the first heat generating layer 2 and the second heat generating layer 3 is a susceptor, which can comprise a susceptor material. As used herein, the term "susceptor material" refers to a material that can convert electromagnetic energy into heat. When placed within a varying electromagnetic field, eddy currents induced in the susceptor material cause heating of the susceptor material. In such embodiments, the susceptor material is designed to interface with the aerosol-generating device 100 comprising a magnetic field generator. The magnetic field generator generates a varying magnetic field to heat the susceptor material placed within the varying magnetic field. In use, the susceptor material is placed within the varying magnetic field generated by the magnetic field generator. Therein, the magnetic field generator is electrically connected to a battery assembly, which provides the magnetic field generator with an electrical current to generate the varying magnetic field. The magnetic field generator can comprise one or more induction coils that generate the varying magnetic field, which can surround the susceptor material. In one embodiment, the aerosol-generating device 100 is capable of generating a varying magnetic field between 1 and 30 MHz, such as between 2 and 10 MHz, such as between 5 and 7 MHz. In one embodiment, the aerosol-generating device 100 is capable of generating a varying magnetic field having a field strength (H-field) between 1 and 5 kA / m, such as between 2 and 3 kA / m, such as about 2.5 kA / m.

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

[0067] In an embodiment of the present application, at least one of the first heat generating layer 2 and the second heat generating layer 3 can comprise a light-transmitting substrate and an infrared electrothermal coating layer combined on the light-transmitting substrate. The infrared electrothermal coating layer can generate heat energy under the condition of being electrified, and in turn generate infrared rays of a certain wavelength, for example, infrared rays of 0.75 μm-1000 μm. The infrared electrothermal coating layer can be formed by fully stirring far-infrared electrothermal ink, ceramic powder and inorganic binder, and then printing on the surface of the substrate, and then drying and curing for a certain time, and the thickness of the infrared electrothermal coating layer is 30 μm-50 μm; of course, the infrared electrothermal coating layer can also be formed by mixing and stirring tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride and anhydrous copper sulfate in a certain proportion, and then coating on the outer surface of the substrate; or be one of a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer, a zirconium-titanium nitride ceramic layer, a zirconium-titanium boride ceramic layer, a zirconium-titanium carbide ceramic layer, an iron oxide ceramic layer, an iron nitride ceramic layer, an iron boride ceramic layer, an iron carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel-cobalt oxide ceramic layer, a nickel-cobalt nitride ceramic layer, a nickel-cobalt boride ceramic layer, a nickel-cobalt carbide ceramic layer or a high-silicon molecular sieve ceramic layer; the infrared electrothermal coating layer can also be other existing material coating.

[0068] In an embodiment of the present application, the first heat generating layer 2 and the second heat generating layer 3 generate heat uniformly.

[0069] In an embodiment of the present application, when the first heat generating layer 2 is closer to the first end 11 than the second heat generating layer 3, the heat generation of the part of the second heat generating layer 3 overlapping the first heat generating layer 2 is less than or equal to the heat generation of the part of the second heat generating layer 3 away from the first heat generating layer 2.

[0070] In an embodiment of the present application, when the second heat generating layer 3 is closer to the first end 11 than the first heat generating layer 2, the heat generation of the part of the first heat generating layer 2 overlapping the second heat generating layer 3 is less than or equal to the heat generation of the part of the first heat generating layer 2 away from the second heat generating layer 3.

[0071] In an embodiment of the present application, the distribution of the heat generation of the first heat generating layer 2 or the second heat generating layer 3 can be realized by controlling the distribution of the resistance value of the first heat generating layer 2 or the second heat generating layer 3.

[0072] In an embodiment of the present application, the surface of the second heat generating layer 3 away from the second insulating layer 5 is further provided with a protective layer. In an embodiment of the present application, the protective layer comprises an enamel layer or an anti-sticking coating layer.

[0073] An embodiment of the present application provides an aerosol generating device 100, as shown in Figure 6As shown, the battery assembly 30 and the heating module 10 described above are included, and the battery assembly 30 provides the heating module 10 with electric energy.

[0074] It should be noted that the preferred embodiments of the present application are shown in the specification and drawings of this application, but are not limited to the embodiments described in the specification, and further, for those skilled in the art, can be improved or changed according to the above description, and all these improvements and changes shall belong to the protection scope of the claims of the present application.

Claims

1. A heating module, characterized in that, Comprising: a substrate having a first end and a second end disposed opposite to each other, the first end and the second end being in a first direction; a first heating layer disposed on the substrate; a second heating layer disposed on a side of the first heating layer away from the substrate; the first heating layer and the second heating layer at least partially overlap, at least one of the first heating layer and the second heating layer is disposed at the first end.

2. The heating module of claim 1, wherein, the substrate comprises a support tube defining a heating cavity for accommodating an aerosol generating article and an insertion opening through which the aerosol generating article is inserted, one end of the support tube near the insertion opening being the first end, and one end of the support tube away from the insertion opening being the second end.

3. The heating module of claim 2, wherein, the first heating layer surrounds the substrate; and / or the second heating layer surrounds the first heating layer.

4. The heating module of claim 1, wherein, when the first heating layer is closer to the first end than the second heating layer, a length of the first heating layer in the first direction is less than or equal to a length of the second heating layer in the first direction; and / or when the second heating layer is closer to the first end than the first heating layer, a length of the second heating layer in the first direction is less than or equal to a length of the first heating layer in the first direction.

5. The heating module of claim 4, wherein, when the first heating layer is closer to the first end than the second heating layer, a projection of the first heating layer on the second heating layer is within the second heating layer; and / or when the second heating layer is closer to the first end than the first heating layer, a projection of the second heating layer on the first heating layer is within the first heating layer.

6. The heating module of claim 4, wherein, a first insulating layer is disposed between the substrate and the first heating layer; and / or a second insulating layer is disposed between the first heating layer and the second heating layer.

7. The heating module of claim 1, wherein, at least one of the first heating layer and the second heating layer is an electrically resistive heating element.

8. The heating module of claim 1, wherein, when the first heating layer is closer to the first end than the second heating layer, a length of the first heating layer perpendicular to the first direction is greater than a length of the second heating layer perpendicular to the first direction; and / or when the second heating layer is closer to the first end than the first heating layer, a length of the second heating layer perpendicular to the first direction is greater than a length of the first heating layer perpendicular to the first direction.

9. The heating module of claim 8, wherein, at least one of the first heating layer and the second heating layer is an infrared heating coating.

10. The heating module of claim 1, wherein, at least one of the first heating layer and the second heating layer is a susceptor.

11. The heating module of claim 1, wherein, a battery assembly providing electrical energy to the heating module.

12. An aerosol-generating device comprising: the battery assembly providing electrical energy to the heating module.

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