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 first heating layer is a heating coating printed on the base material; the first insulating layer covers at least part of the first heating layer; the second heating layer is a heating coating printed on the first insulating layer; the orthographic projection of the first heating layer on the base material and the orthographic projection of the second heating layer on the base material are at least partially overlapped. At least one of the first heating layer and the second heating layer of the heating module is heated firstly, so that the corresponding aerosol generating product can smoke first; under the same heating power, the first heating layer or the second heating layer performs centralized heating, so that the aerosol generating product corresponding to the first heating layer or the second heating layer 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 comprises 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;

[0006] A first heating layer, which is a heating coating printed on the substrate;

[0007] A first insulating layer, which covers at least part of the first heating layer;

[0008] A second heating layer, which is a heating coating printed on the first insulating layer;

[0009] The orthographic projection of the first heating layer on the substrate and the orthographic projection of the second heating layer on the substrate at least partially overlap, and the first heating layer and the second heating layer are insulated by the first insulating layer.

[0010] The present application provides a heating module, wherein the substrate comprises a support tube, which defines a heating cavity for accommodating an aerosol generation article and an insertion opening through which the aerosol generation article can be inserted.

[0011] The present application provides a heating module, wherein the first heating layer surrounds the substrate; and / or the second heating layer surrounds the first heating layer.

[0012] The present application provides a heating module, wherein the substrate has a first end and a second end arranged oppositely, the direction in which the first end and the second end are arranged is a first direction, and at least one of the first heating layer and the second heating layer is arranged at the first end.

[0013] The 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; or,

[0014] 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.

[0015] The application provides a heating module, when the first heating layer and the second heating layer are flush at the first end, the orthographic projection area of the first heating layer on the substrate is located in the orthographic projection area of the second heating layer on the substrate; or

[0016] When the first heating layer and the second heating layer are flush at the first end, the orthographic projection area of the second heating layer on the substrate is located in the orthographic projection area of the first heating layer on the substrate.

[0017] The application provides a heating module, a second insulating layer is arranged between the substrate and the first heating layer.

[0018] The application provides a heating module, at least one of the first heating layer and the second heating layer is a thick film heating layer, an infrared heating coating or a susceptor.

[0019] The application provides a heating module, comprising a first electrode, a second electrode, a third electrode and a fourth electrode, the first electrode and the second electrode are connected to the first heating layer, and the third electrode and the fourth electrode are connected to the second heating layer.

[0020] The application provides a heating module, the first electrode and the second electrode are oppositely arranged, the first heating layer comprises a first sub-heating layer and a second sub-heating layer, the first sub-heating layer and the second sub-heating layer are located between the first electrode and the second electrode, and the first sub-heating layer and the second sub-heating layer are distributed along the circumference of the substrate; and / or

[0021] The third electrode and the fourth electrode are oppositely arranged, the second heating layer comprises a third sub-heating layer and a fourth sub-heating layer, the third sub-heating layer and the fourth sub-heating layer are located between the third electrode and the fourth electrode, and the third sub-heating layer and the fourth sub-heating layer are distributed along the circumference of the substrate.

[0022] The application provides a heating module, the substrate has oppositely arranged first and second ends, the direction in which the first and second ends are located is the first direction,

[0023] The first electrode, the second electrode, the third electrode and the fourth electrode all extend along the first direction.

[0024] The application provides a heating module, including a first wire and a second wire, the third sub-heating layer and the fourth sub-heating layer are provided with a first through hole and a second through hole, the first wire is connected to the first electrode through the first through hole, and the second wire is connected to the second electrode through the second through hole.

[0025] The application provides a heating module, the first electrode, the third electrode, the second electrode and the fourth electrode are uniformly distributed in the circumferential direction of the substrate.

[0026] The application provides a heating module, the substrate has a first end and a second end arranged oppositely, the direction in which the first end and the second end are located is a first direction,

[0027] The first electrode and the second electrode extend along the first direction, and the third electrode and the fourth electrode extend along the circumference of the substrate.

[0028] The application provides a heating module, the third sub-heating layer and the fourth sub-heating layer have a first gap and a second gap therebetween, the first gap and the second gap are arranged oppositely, a projection of the first electrode in the radial direction of the substrate is at least partially located in the first gap, and a projection of the second electrode in the radial direction of the substrate is at least partially located in the second gap.

[0029] The application provides a heating module, including a first wire and a second wire, the first insulating layer is provided with a third through hole corresponding to the first gap, the first wire is connected to the first electrode through the third through hole, the first insulating layer is provided with a fourth through hole corresponding to the second gap, and the second wire is connected to the second electrode through the fourth through hole.

[0030] The application provides a heating module, including a third wire and a fourth wire, the third wire is connected to the third electrode, the fourth wire is connected to the fourth electrode, a connecting point of the first wire and the first electrode, a connecting point of the third wire and the third electrode, and a connecting point of the fourth wire and the fourth electrode are located on the same straight line, and the first electrode and the second electrode are uniformly distributed in the circumferential direction of the substrate.

[0031] The application provides a heating module, the third electrode and the fourth electrode are both ring electrodes.

[0032] The application provides an aerosol generating device, including a battery assembly and the above-mentioned heating module, and the battery assembly provides electric energy for the heating module.

[0033] At least one of the first heating layer and the second heating layer of the heating module of the present application is heated first, so that the aerosol generating article corresponding thereto can smoke first; under the same heating power, the first heating layer or the second heating layer of the heating module concentrates heat, so that the aerosol generating article corresponding to the first heating layer or the second heating layer of the heating module can quickly reach the smoking temperature to produce more smoke; the problem of inconsistent taste before and after smoking caused by the decline of aerosol concentration in the later smoking process is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0034] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document, these example are not to be construed as limiting the embodiments, elements having the same reference numbers in different figures represent like elements, unless otherwise indicated, the figures in the drawings are not to scale.

[0035] Figure 1 A schematic diagram of the heating module of one embodiment of the present application;

[0036] Figure 2 A schematic diagram of the heating module of one embodiment of the present application;

[0037] Figure 3 A schematic diagram of the heating module of one embodiment of the present application;

[0038] Figure 4 A schematic diagram of the heating module of one embodiment of the present application;

[0039] Figure 5 A schematic diagram of the heating module of one embodiment of the present application;

[0040] Figure 6 A schematic diagram of the heating module of one embodiment of the present application;

[0041] Figure 7 A schematic diagram of the heating module of one embodiment of the present application;

[0042] Figure 8 A schematic diagram of the heating module of one embodiment of the present application;

[0043] Figure 9 A schematic diagram of the heating module of one embodiment of the present application;

[0044] Figure 10 A schematic diagram of the heating module of one embodiment of the present application;

[0045] Figure 11 A schematic diagram of the aerosol generating device of one embodiment of the present application.

[0046] In the drawings:

[0047] 10, heating module;

[0048] 1, base material; 11, first end; 12, second end; 13, support tube; 131, heating cavity; 132, insertion opening;

[0049] 2, first heating layer; 21, first electrode; 22, second electrode; 23, first sub-heating layer; 24, second sub-heating layer;

[0050] 3, second heating layer; 31, third electrode; 32, fourth electrode; 33, third sub-heating layer; 34, fourth sub-heating layer; 35, first through hole; 36, second through hole; 37, first gap; 38, second gap;

[0051] 4, second insulating layer;

[0052] 5, first insulating layer; 51, third through hole; 52, fourth through hole;

[0053] 20, aerosol generating article; 201, filter segment; 202, smoking segment;

[0054] 30, battery assembly;

[0055] 100, aerosol generating device. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0057] The terms "first", "second", "third" in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating 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 the present application are only used to explain the relative position relationship or movement condition between components, and if the specific posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0058] 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.

[0059] 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.

[0060] This application provides a heating module 10, such as Figures 1-3 As shown, it includes: a substrate 1, a first heating layer 2, a first insulating layer 5, and a second heating layer 3. The first heating layer 2 is a heating coating printed on the substrate 1. The first insulating layer 5 covers at least a portion of the first heating layer 2. The second heating layer 3 is a heating coating printed on the first insulating layer 5. The orthographic projection of the first heating layer 2 on the substrate 1 and the orthographic projection of the second heating layer 3 on the substrate 1 at least partially overlap, and the first heating layer 2 and the second heating layer 3 are insulated from each other by the first insulating layer 5.

[0061] In this application, at least one of the first heating layer 2 and the second heating layer 3 of the heating module 10 is heated first, so that the corresponding aerosol generating product can emit smoke first. Under the same heating power, the first heating layer 2 or the second heating layer 3 of the heating module 10 heats up in a concentrated manner, so that the aerosol generating product corresponding to the first heating layer 2 or the second heating layer 3 of the heating module 10 can quickly reach the smoke generation temperature and generate a large amount of smoke. This avoids the problem of inconsistent taste caused by the aerosol concentration decreasing during the later inhalation process due to the uniform heating of the heating module 10 at one time.

[0062] In an embodiment of the present application, the substrate 1 has a first end 11 and a second end 12 arranged oppositely, the first end 11 and the second end 12 are in a first direction, and at least one of the first heating layer 2 and the second heating layer 3 is arranged at the first end 11. At least one of the first heating layer 2 and the second heating layer 3 of the heating module 10 of the present application is arranged at the first end 11, so that the first end 11 of the heating module 10 is preferentially heated, so that the aerosol generating article 20 corresponding to the first end 11 of the heating module 10 can smoke first; under the same heating power, the first end 11 of the heating module 10 concentrates heat, so that the aerosol generating article 20 corresponding to the first end 11 of the heating module 10 can quickly reach the smoking temperature to produce 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 10 at one time is avoided.

[0063] In an embodiment of the present application, the substrate 1 can be sheet-shaped, tubular, or columnar. Correspondingly, the heating module 10 can be a sheet-shaped, columnar heating needle, which is inserted into the aerosol generating article 20 to heat but not burn to generate aerosol for the user to smoke, and in this way, the heating module 10 heats the aerosol generating article 20 from the center of the aerosol generating article 20; or the heating module 10 can be tubular, and the aerosol generating article 20 is inserted into the heating cavity 131 of the tubular heating module 10, and the heating module 10 heats the aerosol generating article 20 in the circumferential direction of the aerosol generating article 20.

[0064] In an embodiment of the present application, as shown in Figure 3 the substrate 1 includes a support tube 13, the support tube 13 defines a heating cavity 131 for accommodating the aerosol generating article and an insertion port 132 for inserting the aerosol generating article 20, one end of the support tube 13 close to the insertion port 132 is the first end 11, and the other end of the support tube 13 away from the insertion port 132 is the second end 12.

[0065] In an embodiment of the present application, one end of the aerosol generating article 20 for the user to smoke is the proximal end, and the other end of the aerosol generating article 20 away from the first end is the distal end. The aerosol generating article 20 includes a filter segment 201 and a smoking segment 202, after the aerosol generating article 20 is inserted into the insertion port 132, the filter segment 201 is exposed outside the heating cavity 131 for the user to hold, for filtering and outputting the aerosol, and the filter segment 201 can generally include a porous material such as cellulose acetate. The smoking segment 202 is inserted into the heating cavity 131, and the heating module 10 heats the smoking segment 202 to generate aerosol.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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. In an embodiment of the present application, 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.

[0070] 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.

[0071] In an embodiment of the present application, 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 when the first heat-generating layer 2 is closer to the first end 11 than the second heat-generating layer 3. In an embodiment of the present application, 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 2 when the second heat-generating layer 3 is closer to the first end 11 than the first heat-generating layer 2.

[0072] In an embodiment of the present application, as shown in Figure 1 the first heat-generating layer 2 is located within the orthographic projection area of the second heat-generating layer 3 on the substrate 1 when the second heat-generating layer 3 and the first heat-generating layer 2 are flush at the first end 11. 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 is heated first on the side close to the filter 201, 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 simultaneously, 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 smokes on the side away from the filter 201. 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.

[0073] In an embodiment of the present application, as shown in Figure 2As shown, when the first heating layer 2 and the second heating layer 3 are flush at the first end 11, the orthographic projection area of the second heating layer 3 on the substrate 1 is located within the orthographic projection area of the first heating layer 2 on the substrate 1. 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 simultaneously, 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.

[0074] In an embodiment of the present application, the first heating layer 2 and the second heating layer 3 work simultaneously. 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 overlapping part of the first heating layer 2 and the second heating layer 3 of the heating module 10 is greater than that of other parts, so that the user can smoke quickly, obtain a large amount of smoke, and obtain aerosols with consistent taste in the front and back when smoking

[0075] 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 first heating layer 2 is closer to the first end 11 than the second heating layer 3, the length of the first heating layer 2 in the first direction x is less than or equal to the length of the second heating layer 3; when the second heating layer 3 is closer to the first end 11 than the first heating layer 2, the length of the second heating layer 3 in the first direction x is less than or equal to the length of the first heating layer.

[0076] 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.

[0077] 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.

[0078] In one embodiment of this application, the substrate 1 includes metal or ceramic, and the substrate 1 has a certain structural strength to support the first heating layer 2 and the second heating layer 3 disposed on the substrate 1.

[0079] In one embodiment of this application, a second insulating layer 4 is disposed between the substrate 1 and the first heating layer 2; and / or a first insulating layer 5 is disposed between the first heating layer 2 and the second heating layer 3. The second insulating layer 4 and the first insulating layer 5 provide electrical insulation between the substrate 1 and the first heating layer 2, and between the first heating layer 2 and the second heating layer 3. The second insulating layer 4 and the first insulating layer 5 can be disposed on the surface of the substrate 1 or the first heating layer 2 by processes such as spraying or wrapping.

[0080] In one embodiment of this application, at least one of the first heating layer 2 and the second heating layer 3 is a resistive heating element. When the resistive heating element is powered, it can generate Joule heating. 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.

[0081] In one embodiment of this application, such as Figure 4 As shown, when the first heating layer 2 is closer to the first end 11 than the second heating layer 3, 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. In one embodiment of this application, the heating module 10 is a tubular heating element. The lengths of the first heating layer 2 and the second heating layer 3 perpendicular to the first direction x refer to the lengths of the first heating layer 2 and the second heating layer 3 after they are unfolded. 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, after the first heating layer 2 and the second heating layer 3 surround the substrate 1, 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, so that the conductive pins of the first heating layer 2 and the conductive pins of the second heating layer 3 will not interfere when they are led out.

[0082] In one embodiment of the present application, (not shown) the length of the second heat generating layer 3 perpendicular to the first direction x is greater than the length of the first heat generating layer 2 perpendicular to the first direction x when the second heat generating layer 3 is closer to the first end 11 than the first heat generating layer 2. In one embodiment of the present application, the heating module 10 is a tubular heat generating body, the length of the second heat generating layer 3 perpendicular to the first direction x and the length of the first heat generating layer 2 perpendicular to the first direction x respectively refer to the length of the first heat generating layer 2 and the second heat generating layer 3 after being unfolded, when the length of the second heat generating layer 3 perpendicular to the first direction x is greater than the length of the first heat generating layer 2 perpendicular to the first direction x, the conductive pins at the two ends of the second heat generating layer 3 are located between the conductive pins at the two ends of the first heat generating layer 2 after the first heat generating layer 2 and the second heat generating layer 3 are wrapped around the substrate 1, so that the conductive pins of the second heat generating layer 3 and the conductive pins of the first heat generating layer 2 do not interfere when being led out.

[0083] In one embodiment of the present application, at least one of the first heat generating layer 2 and the second heat generating layer 3 is a thick film heat generating layer.

[0084] In one embodiment of the present application, at least one of the first heat generating layer 2 and the second heat generating layer 3 is a susceptor. The susceptor can comprise a susceptor material. As used herein, the term “susceptor material” refers to a material that can convert electromagnetic energy into heat. An eddy current induced in the susceptor material when located within a varying electromagnetic field causes heating of the susceptor material. In such embodiments, the susceptor material is designed to engage with an aerosol-generating device 100 comprising a magnetic field generator. The magnetic field generator generates a varying magnetic field to heat the susceptor material located within the varying magnetic field. In use, the susceptor material is located within the varying magnetic field generated by the magnetic field generator. The magnetic field generator is in electrical connection with 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, for example between 2 and 10 MHz, for example 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, for example between 2 and 3 kA / m, for example about 2.5 kA / m.

[0085] In one embodiment of the present application, the susceptor material can include a metal or carbon. In one embodiment, the susceptor material can include a ferromagnetic material, such as ferrite, ferromagnetic steel, or stainless steel. In one embodiment, the susceptor material includes a nickel-iron alloy. In one embodiment, the susceptor material includes a 400 series stainless steel, including a 410 grade or 420 grade or 430 grade stainless steel. Different materials will dissipate different amounts of energy when positioned within an electromagnetic field having similar frequency and field strength values. Thus, the parameters of the susceptor material, such as the material type, length, width, and thickness, can all be varied to provide a desired power dissipation within a known electromagnetic field.

[0086] In one embodiment of the present application, at least one of the first heating layer 2 and the second heating layer 3 can include a light-transmitting substrate and an infrared electrothermal coating layer combined on the light-transmitting substrate. The infrared electrothermal coating layer is capable of generating heat energy under the condition of being electrified, thereby generating infrared rays of a certain wavelength, such as infrared rays of 0.75 μm-1000 μm. The infrared electrothermal coating layer can be coated on the surface of the substrate after the far-infrared electrothermal ink, ceramic powder, and inorganic binder are fully stirred and uniformly mixed, and then baked and cured for a certain period of 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 coated on the outer surface of the substrate after tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride, and anhydrous copper sulfate are mixed and stirred in a certain proportion; 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; and the infrared electrothermal coating layer can also be other existing material coating layers.

[0087] In one embodiment of the present application, the first heating layer 2 and the second heating layer 3 generate heat uniformly.

[0088] In one embodiment of the present application, when the first heating layer 2 is closer to the first end 11 than the second heating layer 3, the heat generation amount of the portion of the second heating layer 3 overlapping the first heating layer 2 is less than or equal to the heat generation amount of the portion of the second heating layer 3 away from the first heating layer 2.

[0089] In one embodiment of the present application, when the second heating layer 3 is closer to the first end 11 than the first heating layer 2, the heat generation amount of the portion of the first heating layer 2 overlapping the second heating layer 3 is less than or equal to the heat generation amount of the portion of the first heating layer 2 away from the second heating layer 3.

[0090] In an embodiment of the present application, the distribution of the heat generation amount of the first heat generation layer 2 or the second heat generation layer 3 can be achieved by controlling the distribution of the resistance value of the first heat generation layer 2 or the second heat generation layer 3.

[0091] In an embodiment of the present application, Figures 5-10 As shown in the drawings, the heating module 10 comprises a first electrode 21, a second electrode 22, a third electrode 31 and a fourth electrode 32, the first electrode 21 and the second electrode 22 are connected to the first heat generation layer 2, and the third electrode 31 and the fourth electrode 32 are connected to the second heat generation layer 3.

[0092] In an embodiment of the present application, as Figures 5-6 shown, the first electrode 21 and the second electrode 22 are oppositely arranged, the first heat generation layer 2 comprises a first sub heat generation layer 23 and a second sub heat generation layer 24, the first sub heat generation layer 23 and the second sub heat generation layer 24 are located between the first electrode 21 and the second electrode 22, and the first sub heat generation layer 23 and the second sub heat generation layer 24 are distributed along the circumferential direction of the substrate 1.

[0093] In an embodiment of the present application, as Figures 7-10 shown, the third electrode 31 and the fourth electrode 32 are oppositely arranged, the second heat generation layer 3 comprises a third sub heat generation layer 33 and a fourth sub heat generation layer 34, the third sub heat generation layer 33 and the fourth sub heat generation layer 34 are located between the third electrode 31 and the fourth electrode 32, and the third sub heat generation layer 33 and the fourth sub heat generation layer 34 are distributed along the circumferential direction of the substrate 1.

[0094] In an embodiment of the present application, the opposite arrangement includes radial opposite arrangement or axial direction opposite arrangement. For example, when the third electrode 31 and the fourth electrode 32 both extend along the axial direction, the third electrode 31 and the fourth electrode 32 are oppositely arranged along the radial direction; when the third electrode 31 and the fourth electrode 32 both extend along the circumferential direction, the third electrode 31 and the fourth electrode 32 are oppositely arranged along the axial direction.

[0095] In an embodiment of the present application, as Figures 5-8As shown, the substrate 1 has a first end 11 and a second end 12 oppositely arranged, the first end 11 and the second end 12 are in a first direction, and the first electrode 21, the second electrode 22, the third electrode 31 and the fourth electrode 32 all extend along the first direction. In an embodiment of the present application, the heating module 10 includes a first wire 6 and a second wire 7, the third sub-heating layer 33 and the fourth sub-heating layer 34 are provided with a first through hole 35 and a second through hole 36, the first wire 6 and the first electrode 21 are connected through the first through hole 35, and the second wire 7 and the second electrode 22 are connected through the second through hole 36. In an embodiment of the present application, the heating module 10 includes a third wire 8 and a fourth wire 9, the third wire 8 is connected to the third electrode 31, and the fourth wire 9 is connected to the fourth electrode 32. In an embodiment of the present application, the first electrode 21, the third electrode 31, the second electrode 22 and the fourth electrode 32 are uniformly distributed in the circumferential direction of the substrate 1, so that the first wire 6, the third conductive 8, the second wire 7 and the fourth wire 9 have sufficient accommodation space, and sufficient operation space is reserved for the welding of the first wire 6, the third conductive 8, the second wire 7 and the fourth wire 9 to the first electrode 21, the third electrode 31, the second electrode 22 and the fourth electrode 32.

[0096] In an embodiment of the present application, as Figure 5 、 Figure 6 、 Figure 9 and Figure 10As shown, the substrate 1 has a first end 11 and a second end 12 disposed opposite to each other, the direction of the first end 11 and the second end 12 being a first direction, the first electrode 21 and the second electrode 22 extending along the first direction, and the third electrode 31 and the fourth electrode 32 extending along the circumference of the substrate 1. In one embodiment of this application, the third electrode 31 and the fourth electrode 32 are both annular electrodes. In one embodiment of this application, the third sub-heating layer 33 and the fourth sub-heating layer 34 have a first gap 37 and a second gap 38 disposed opposite to each other, the projection of the first electrode 21 in the radial direction of the substrate 1 is at least partially located within the first gap 21; the projection of the second electrode 22 in the radial direction of the substrate 1 is at least partially located within the second gap 38. In one embodiment of this application, the heating module 10 includes a first wire 6 and a second wire 7, the first insulating layer 5 is provided with a third through hole 51 corresponding to the first gap 37, the first wire 6 is connected to the first electrode 21 through the third through hole 51; the first insulating layer 5 is provided with a fourth through hole 52 corresponding to the second gap 38, the second wire 7 is connected to the second electrode 22 through the fourth through hole 52. In one embodiment of this application, the heating module 10 includes a third wire 8 and a fourth wire 9. The third wire 8 is connected to the third electrode 31, and the fourth wire 9 is connected to the fourth electrode 32. The connection points of the first wire 6 and the first electrode 21, the third wire 8 and the third electrode 31, and the fourth wire 9 and the fourth electrode 32 are located on the same straight line. The first electrode 21 and the second electrode 22 are uniformly distributed in the circumferential direction of the substrate 1. In this solution, it is not necessary to open through holes in the second heating layer 3 to connect the first wire 6 to the first electrode 21 and the second wire 7 to the second electrode 22. In one embodiment of this application, a protective layer is also provided on the surface of the second heating layer 3 away from the first insulating layer 5. In one embodiment of this application, the protective layer includes a glaze layer or an anti-stick coating.

[0097] One embodiment of this application provides an aerosol generating device 100, such as... Figure 11 As shown, it includes a battery assembly 30 and the aforementioned heating module 10, with the battery assembly 30 providing power to the heating module 10.

[0098] 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 module, characterized in that, The substrate comprises a support tube, the support tube defines a heating cavity for accommodating an aerosol generating article and an insertion opening through which the aerosol generating article can be inserted. The first heating layer surrounds the substrate; and / or the second heating layer surrounds the first heating layer. The substrate has a first end and a second end arranged oppositely, a direction in which the first end and the second end are arranged is a first direction, at least one of the first heating layer and the second heating layer is arranged at the first end. When the first heating layer is closer to the first end than the second heating layer, in the first direction, a length of the first heating layer is less than or equal to a length of the second heating layer; or, When the second heating layer is closer to the first end than the first heating layer, in the first direction, a length of the second heating layer is less than or equal to a length of the first heating layer. When the first heating layer and the second heating layer are flush at the first end, a projection area of the first heating layer on the substrate is located within a projection area of the second heating layer on the substrate; or 2. The heating module of claim 1, wherein, When the first heating layer and the second heating layer are flush at the first end, a projection area of the second heating layer on the substrate is located within a projection area of the first heating layer on the substrate.

3. The heating module of claim 2, wherein, The substrate and the first heating layer are provided with a second insulating layer.

4. The heating module of claim 1, wherein, At least one of the first heating layer and the second heating layer is a thick film heating layer, an infrared heating coating or a susceptor.

5. The heating module of claim 4, wherein, The first electrode and the second electrode are arranged oppositely, the first heating layer comprises a first sub-heating layer and a second sub-heating layer, the first sub-heating layer and the second sub-heating layer are located between the first electrode and the second electrode, the first sub-heating layer and the second sub-heating layer are distributed along a circumferential direction of the substrate; and / or The third electrode and the fourth electrode are arranged oppositely, the second heating layer comprises a third sub-heating layer and a fourth sub-heating layer, the third sub-heating layer and the fourth sub-heating layer are located between the third electrode and the fourth electrode, the third sub-heating layer and the fourth sub-heating layer are distributed along a circumferential direction of the substrate.

6. The heating module of claim 5, wherein, The substrate has a first end and a second end arranged oppositely, a direction in which the first end and the second end are arranged is a first direction, The first electrode, the second electrode, the third electrode and the fourth electrode all extend along the first direction. ​ 7. The heating module of claim 1, wherein, ​ 8. The heating module of claim 1, wherein, ​ 9. The heating module of claim 1, wherein, ​ 10. The heating module of claim 9, wherein, ​ ​ 11. The heating module of claim 10, wherein, ​ ​ 12. The heating module of claim 11, wherein, The third sub-heating layer and the fourth sub-heating layer are provided with a first through hole and a second through hole, the first lead wire and the first electrode are connected through the first through hole, and the second lead wire and the second electrode are connected through the second through hole.

13. The heating module of claim 11, wherein, The first electrode, the third electrode, the second electrode and the fourth electrode are uniformly distributed in the circumferential direction of the substrate.

14. The heating module of claim 10, wherein, The substrate has oppositely arranged first and second ends, the direction in which the first and second ends are located is a first direction, The first electrode and the second electrode extend along the first direction, and the third electrode and the fourth electrode extend along the circumference of the substrate.

15. The heating module of claim 14, wherein, The third sub-heating layer and the fourth sub-heating layer have a first gap and a second gap, the first gap and the second gap are oppositely arranged, the projection of the first electrode on the radial direction of the substrate is at least partially located in the first gap; the projection of the second electrode on the radial direction of the substrate is at least partially located in the second gap.

16. The heating module of claim 15, wherein, The first insulating layer is provided with a third through hole corresponding to the first gap, and the first lead wire is connected to the first electrode through the third through hole; the first insulating layer is provided with a fourth through hole corresponding to the second gap, and the second lead wire is connected to the second electrode through the fourth through hole.

17. The heating module of claim 16, wherein, The third lead wire is connected to the third electrode, and the fourth lead wire is connected to the fourth electrode, the connection point of the first lead wire and the first electrode, the connection point of the third lead wire and the third electrode, and the connection point of the fourth lead wire and the fourth electrode are located on the same straight line, and the first electrode and the second electrode are uniformly distributed in the circumferential direction of the substrate.

18. The heating module of claim 10, wherein, The third electrode and the fourth electrode are both ring electrodes.

19. An aerosol-generating device comprising: The battery assembly provides electrical energy for the heating module. The battery assembly provides electrical energy for the heating module.

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