JP2023532220A - Heat generating assembly and aerosol forming device - Google Patents

Abstract

A heat generating assembly and an aerosol forming device are provided. The heating assembly (30) includes a substrate (31) and a heating element (32), the heating element (32) being embedded in the substrate (31) and the heating element (32) having spaced apart first extensions ( 321) and a second extension (322) connected to one end of the first extension (321), the substrate (31) and the heating element (32) being at least partially inserted into the aerosol-forming substrate, When the first extension (321) and the second extension (322) are energized, they generate heat which is used to heat the aerosol-forming substrate. The heating element (32) of the heating assembly (30) can be inserted directly into the aerosol-forming substrate and has good stability.

Description

The present invention relates to the technical field of heated non-combustion smoke generating devices, and more particularly to heat generating assemblies and aerosol forming devices.

As an alternative to cigarettes, e-cigarettes are safe, convenient, healthy, environmentally friendly, and so on. Heated non-combustion e-cigarettes, also called aerosol forming devices, may be mentioned.

In conventional heated non-combustible aerosol-forming devices, the heating mode is usually tubular perimeter heating or central embedded heating, where tubular perimeter heating is the heating tube wrapped around the aerosol-forming substrate (e.g., cut tobacco). Heating the aerosol-forming substrate, center-embedded heating is inserting the heating assembly into the aerosol-forming substrate to heat the aerosol-forming substrate. Heating assemblies are widely used due to features such as simplicity of manufacture and ease of use. The conventional heating assembly is mainly formed by taking ceramics or metal with insulated substrate as the substrate, then printing or coating the resistive heating circuit on the substrate, and performing high temperature treatment to fix the resistive heating circuit on the substrate. be done.

However, since the resistive heating circuit of the conventional heating assembly is a single layer of thin film that is later printed or coated onto the ceramic substrate, during the course of use where the heating assembly is inserted into the aerosol-forming substrate multiple times, the curved shape of the substrate may cause When the resistance heating circuit generates heat at a high temperature, it is easy to fall off the substrate, and the stability is low. The heating uniformity of the aerosol-forming substrate is poor because it is not in contact with the forming substrate.

The present application provides a heating assembly and an aerosol forming device, which can solve the problem that the resistive heating circuit of the conventional heating assembly tends to fall off the substrate and has low stability when it generates high temperature.

To solve the above technical problem, one technical solution adopted by the present application is to provide a heat generating assembly. The heating assembly includes a substrate and a heating element, the heating element embedded in the substrate, the heating element having a spaced apart first extension and a second extension connected to one end of the first extension. The substrate and the heating element are at least partially inserted into the aerosol-forming substrate and used to heat the aerosol-forming substrate by generating heat when the first extension and the second extension are energized.

To solve the above technical problem, another technical solution adopted by the present application is to provide an aerosol-forming device, which comprises a housing, a heat-generating assembly and a power supply assembly provided in the housing. wherein the power supply assembly is connected to the heat generating assembly and used to power the heat generating assembly, the heat generating assembly being the heat generating assembly according to the above.

According to the heating assembly and aerosol-forming apparatus of the present application, the heating assembly is provided with a substrate and a heating element such that after being inserted into the aerosol-forming substrate, the heating element heats the cut tobacco in the aerosol-forming substrate and the heating element is provided to include a first extension and a second extension connected to the first extension, and the substrate and the first extension and the second extension of the heating element are at least partially aerosolized. Compared to conventional heating elements screen-printed on ceramic substrates, the substrate and heating element of the present application are used to heat the aerosol-forming substrate by generating heat when energized and inserted into the forming substrate. It can be inserted directly and independently, and there is no problem that the heating element will fall off from the ceramic substrate when it heats up to a high temperature and cause a failure, greatly improving the stability of the heating assembly. By being embedded in the substrate, the strength of the heat generating assembly is improved, and force can be received by the substrate during insertion of the heat generating assembly into the aerosol-forming substrate, effectively solving the problem of bending of the heating element due to force receiving. To avoid.

1 is a structural schematic diagram of a heating assembly according to one embodiment of the present application; FIG. 1 is a structural schematic diagram of a heating element according to an embodiment of the present application; FIG. 1 is a schematic plan view of a heat generating assembly according to an embodiment of the present application; FIG. FIG. 4 is a schematic plan view of a heat generating assembly according to another embodiment of the present application; FIG. 4 is a schematic plan view of a heat generating assembly according to yet another embodiment of the present application; 1 b is an exploded schematic diagram of the structure shown in FIG. 1 a according to an embodiment of the present application; FIG. 1 b is an exploded schematic view of the structure shown in FIG. 1 a according to another embodiment of the present application; FIG. 1 is a schematic diagram of a heating assembly inserted into an aerosol spray substrate according to one embodiment of the present application; FIG. FIG. 4 is a schematic diagram of the location of a substrate and a heating element, according to an embodiment of the present application; 1 is an exploded schematic diagram of a heat generating assembly according to one specific embodiment of the present application; FIG. FIG. 5 is an exploded schematic view of a heat generating assembly according to another specific embodiment of the present application; 1 is a side view of a heating element according to one embodiment of the present application; FIG. 1 is a schematic diagram of the dimensions of a heat generating assembly according to one embodiment of the present application; FIG. FIG. 9 is a C arrow view of the structure shown in FIG. 8; FIG. 4 is a structural schematic diagram of a heat generating assembly according to another embodiment of the present application; FIG. 4 is a schematic diagram of a heating assembly inserted into an aerosol spray substrate according to another embodiment of the present application; FIG. 4 is a structural schematic diagram of a heat generating assembly according to yet another embodiment of the present application; FIG. 4 is a schematic diagram of the dimensions of a heat generating assembly according to another embodiment of the present application; FIG. 4 is a structural schematic view after assembling a mounting seat and a heat-generating assembly according to an embodiment of the present application; FIG. 14 is an exploded schematic view of the product corresponding to FIG. 13; FIG. 5 is a structural schematic view after assembling a mounting seat and a heat-generating assembly according to another embodiment of the present application; FIG. 16 is an exploded schematic view of the product corresponding to FIG. 15; FIG. 4 is a front view after assembling a mounting seat and a heat-generating assembly according to an embodiment of the present application; 1 is a structural schematic diagram of an aerosol forming device according to an embodiment of the present application; FIG.

The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are merely part of the embodiments of the present application. , not all examples. All other embodiments obtained by persons skilled in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in this application are used for descriptive purposes only and imply the number of technical features that indicate or imply or indicate relative importance. It should be understood that the Thus, features defined by "first," "second," and "third" may either explicitly or implicitly include at least one such feature. In the present description, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise. All directional indications (e.g., up, down, left, right, front, back, etc.) in the embodiments of the present application are merely relative positional relationships, motion conditions, etc. of each member in a particular pose (illustrated). , and when the particular pose changes, the cues change correspondingly. Also, the terms "including", "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include additional steps or units that are not listed, or those processes, methods. , may optionally include other steps or units specific to the product or apparatus.

References herein to "an embodiment" mean that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of the application. The appearance of the phrase in each position in the specification does not necessarily refer to the same embodiment, nor to separate or alternative embodiments that are mutually exclusive with other embodiments. The embodiments described herein can be combined with other embodiments, both explicitly and implicitly, by those skilled in the art.

The present application will now be described in detail with reference to the drawings and examples.

1a to 3a, FIG. 1a is a structural schematic diagram of a heating assembly 30 according to an embodiment of the present application, and FIG. 2 is an exploded schematic diagram of the structure shown in FIG. 1a according to an embodiment of the present application. 3a is an exploded schematic view of the structure shown in FIG. 1a according to another embodiment of the present application, which provides a heat generating assembly 30, specifically comprising an aerosol-forming substrate and used to heat an aerosol-forming substrate, e.g., in one exemplary embodiment, the heating assembly 10 is specifically inserted into and used to heat cut tobacco. It should be appreciated that any of the examples that follow are illustrative and that in the examples the aerosol-forming substrate may specifically be cut tobacco.

Specifically, the heating assembly 30 includes a substrate 31 and a heating element 32 embedded within the substrate 31 .

The substrate 31 may in particular be a rectangular substrate 31, comprising a first end M and a second end N provided opposite the first end M, to the aerosol-forming substrate. , the second end N of the substrate 31 is inserted into the aerosol-forming substrate first, thus the second end N of the substrate 31 is inserted into the aerosol-forming substrate to facilitate the insertion of the heating assembly 30 into the aerosol-forming substrate. The edge N may in particular be provided as a pointed edge, i.e. it is of triangular construction and the included angle formed by two adjacent sides of the pointed edge is in particular 45 degrees- It may be 90 degrees, for example 60 degrees.

Specifically, the material of the substrate 31 may be insulating ceramics, and the substrate 31 made of insulating ceramics has a thermal conductivity of 4-18 W/(mk), a bending strength of 600 MPa or more, and a thermal stability of 450 MPa. may be above 1450 degrees, and the fire resistance may be higher than 1450 degrees. Of course, in other embodiments, the substrate 31 may be an insulated metal, such as a metal substrate provided with an insulating coating, thereby increasing the strength of the heat generating assembly 30 and increasing the strength of the heat generating assembly 30. It prevents bending or breakage of the heating element 32 and allows the heat generated by the heating element 32 to spread to the cut tobacco in contact with the substrate 31, further improving the heating uniformity of the cut tobacco within the aerosol-forming substrate. The material of the substrate 31 can also be a new composite zirconia material, and the substrate 31 made of the new composite zirconia can retain and transfer the heat generated by the heating element 32, thereby improving the energy utilization rate of the heating assembly 30. . The ceramic substrate 31 may also be a ZTA material (zirconia toughened alumina ceramics) or MTA (mullite-alumina composite).

In one specific embodiment, the substrate 31 is provided with a receiving groove 311 along its length, and at least a portion of the heating element 32 is received within the receiving groove 311 so as to be attached to the aerosol-forming substrate. During the insertion of the heating assembly 30, the substrate 31 is subjected to force, thereby avoiding the problem of the heating element 32 being subjected to direct force and causing bending.

Specifically, the substrate 31 has a first surface _C1 and a second surface _D1 provided on the opposite side of the first surface _C1 , and the accommodation groove 311 is specifically the first surface _C1. and the second surface _D1 , the heating element 32 is specifically accommodated in the through groove, and the upper and lower surfaces of the heating element 32 are the first surface C1 and the second surface _D1 of the substrate 31. Since the accommodation groove 311 is flush with the second surface _D1 and is provided as a through groove structure, the heating element 32 accommodated in the accommodation groove 311 is placed on the first surface C1 side and the second surface _C1 side of the substrate 31, respectively. The side _D1 can be exposed and both sides of the heating element 32 can be in direct contact with the cut tobacco in the aerosol-forming substrate after insertion of the heating element 32 into the aerosol-forming substrate, and the energy Not only is the utilization rate high, but the heating is even and the preset temperature field boundaries are well defined.

In other embodiments, according to the needs of the actual temperature field distribution during heating, the upper and lower surfaces of the heating element 32 may be slightly protruded from the first surface _C1 and the second surface _D1 of the substrate 31 respectively, or respectively It may be slightly lower than the _{first surface} C ₁ and the second surface D ₁ of the substrate 31 . can be based on cut tobacco that concentrates the high temperature of the heating element 32 on the top and bottom surfaces of the heating element 32 and contacts the top and bottom surfaces at a high temperature, thereby satisfying the need for strong smoke. On the other hand, when the upper and lower surfaces of the heating element 32 are slightly lower than the first surface _C1 and the second surface _C2 of the substrate 31, the barrier effect of the substrate 31 prevents the upper and lower surfaces of the heating element 32 from coming into contact with the cut tobacco. It can be loosened and the base temperature of the heating element 32 for cut tobacco can be slightly lowered, thereby satisfying the need for soft smoke.

The heating element 32 may be a self-supporting structure, i.e., the heating element 32 may exist independently without depending on another carrier, and the self-supporting heating element 32 may be a conventional ceramics. Compared with the resistive heating film layer formed by printing or coating on the substrate, it is possible to effectively avoid the problem of falling off from the ceramic substrate or metal substrate when the heating element 32 heats up at a high temperature or when the substrate is deformed. , the stability of the heating assembly 30 is greatly improved, and the heating element 32 is a self-supporting structure and can be exposed from the first surface _C1 side and the second surface _D1 side of the substrate 31 at the same time, so that the heat can be Effectively improve the utilization rate and heating uniformity.

Specifically, the material of the heating element 32 may be conductive ceramics. Compared with the conventional metal material, the heating element 32 made of the conductive ceramics material has high conductivity, and the temperature generated by heat generation is uniform. And the power of the conductive ceramic heating element 32 can be adjusted and designed within the range of 3-4 watts, and the conductivity can reach 1*10 ^-4 ohms and 1*10 ^-6 ohms, low It is suitable for voltage start-up, easy to control and design power instantaneously, the bending strength of conductive ceramics can be over 40MPa, and the fire resistance can be higher than 1200°C.

Specifically, for the heating element 32 made of conductive ceramics, a material with an electromagnetic heating wavelength of mid-infrared wavelength may be selected, which is advantageous for spraying the liquid to improve the taste, and the conductive ceramics. The crystal phase structure of the ceramic heating element 32 is a high-temperature stable oxide ceramic, and the good fatigue resistance, high strength, and high density of the oxide ceramic effectively eliminate the volatilization of harmful heavy metals and dust. can be effectively avoided, and the service life of the heating element 32 is greatly extended.

The heating element 32 using the whole ceramic can reduce the hot spot area of the highest temperature, eliminate the risk of fatigue cracking and increased fatigue resistance, have good consistency, and the ceramic heating Due to the high strength of the material and the smoothness of the microcrystalline structure, the surface of the heating element 32 is easy to clean and not easy to stick, and the ceramics production process is used to manufacture the ceramics heating element 32, which is It mainly includes raw material mixing, forming and sintering, and cutting processes, and has simple process, easy control, low cost, and is advantageous for popularization of production and improvement of economic benefits.

Specifically, the heating element 32 made of the conductive ceramics specifically contains a main component and a crystal component, the main component being used for conduction and providing a predetermined resistance to the conductive ceramics, and the main component being a specific may be one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, and titanium, and the crystalline component is a host material for ceramic materials, mainly conductive ceramics The crystalline component is specifically one of lanthanum manganate, lanthanum strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, and yttrium oxide. It may be a species or multiple species. In other embodiments, heating element 32 may comprise a metal alloy or a ceramic alloy comprising an iron-silicon alloy or an iron-silicon-aluminum alloy.

Specifically, as shown in FIG. 1b, FIG. 1b is a structural schematic diagram of a heating element according to an embodiment of the present application, in which the heating element 32 is specifically a first extension part 321 and a second extension 322 connected to the first extension 321, wherein in particular embodiments both the first extension 321 and the second extension 322 are at least partially bound to the aerosol-forming substrate. When inserted and energized, it generates heat and is used to heat the aerosol-forming substrate, as can be appreciated, said first extension 321 and second extension 322 are independently insertable directly into the aerosol-forming substrate, A conventional heating element screen-printed on a ceramic substrate needs to be inserted into the aerosol-forming substrate via a ceramic or insulated metal substrate, and cannot be directly inserted into the aerosol-forming device by itself. The first extension part 321 and the second extension part 322 according to the present application can avoid the problem of falling off the substrate 31 and causing failure when the substrate 31 is deformed or when the substrate 31 is heated at a high temperature, thus greatly improving the reliability of the heating assembly 10 . .

Specifically, the two opposite sides of the portions of the first extension 321 and the second extension 322 for insertion into the aerosol-forming substrate are both in contact with the aerosol, and as can be appreciated, the present application The heating element 32 of is inserted directly into the aerosol-forming substrate without the need for an intervening substrate, so that at least two opposing surfaces of the first extension 321 and the second extension 322 of the heating element 32 are both exposed to the aerosol. Direct contact is possible, thereby greatly improving the heat utilization rate and heating efficiency.

In another embodiment, as shown in FIGS. 1a-3a, the heating element 32 further comprises a third extension 323 for fully inserting into the aerosol-forming substrate to heat the aerosol-forming substrate, specifically However, in the embodiment, the first extending portion 321 and the second extending portion 322 are provided in parallel with a space therebetween, and the adjacent ends of the first extending portion 321 and the second extending portion 322 are connected to the third extending portion. The adjacent ends of the first extension 321 and the second extension 322 connected via the portion 323 are, in particular, the ends that are first inserted into contact with the aerosol-forming substrate, and are understood to be , the first extension portion 321, the second extension portion 322 and the third extension portion 323 are formed as a substantially U-shaped structure, and in a specific embodiment, the first extension portion 321 and the second extension portion 322 and the third extending portion 323 are integrally molded and sintered with conductive ceramics, and specifically, the substrate 31 of the heating element 32 may be cut by laser cutting to form the notch 328, thereby forming the first A heating element 32 having a stretched portion 321, a second stretched portion 322 and a third stretched portion 323 is obtained. As can be appreciated, the heating element 32 may be directly sinter-formed.

The shapes of the first extending portion 321, the second extending portion 322 and the third extending portion 323 are not particularly limited and can be designed according to actual needs. Specifically, the first extending portion 321 and the second extending portion 322 may be elongated plates, and the third extending portion 323 is specifically an arc-shaped plate because the substrate 31 has a sharp end. Specifically, the radius of the inner ring may be 0.5 mm, and the radius of the outer ring may be specifically 2 mm. 31. The advantage of the arc-shaped plate is that the connection stress between the first extending portion 321 and the second extending portion 322 is small, and the strength of the integrated structure is increased.

In this embodiment, the third extending portion 323 is substantially V-shaped. In other embodiments, the third extension 323 is U-shaped or isosceles trapezoidal, or the width of the first extension 321 and the second extension 322 from the end adjacent to the first extension 321 and the second extension 322 . Other shapes that gradually decrease away from 322 are also possible. In this embodiment, the first extension 321 , the second extension 322 and the third extension 323 define a notch 328 , the notch 328 is rectangular in width, or the rectangular third extension 323 Specifically, the notch 328 has an axisymmetric structure, the length direction is parallel to the direction of its central axis, and the first extension portion 321 and the The second extending portions 322 are arranged side by side and in parallel at intervals, and the length direction is parallel to the central axis direction of the notch 328. is perpendicular to the central axis direction of the notch 328 . The heating element 32 has a symmetrical structure with respect to the central axis of the notch 328, that is, the first extending portion 321, the second extending portion 322, and the third extending portion 323 all have symmetrical structures with respect to the central axis of the notch 328. With such a structure, the temperatures at the positions corresponding to the width direction of the first extending part 321, the second extending part 322 and the third extending part 323 on both sides of the notch 328 are matched to improve the taste of the smoke. do.

In another embodiment, as shown in FIG. 1c, FIG. 1c is a schematic plan view of a heat generating assembly according to an embodiment of the present application, wherein the first extension 321 and the second extension 322 are also provided in parallel. However, the notch 328 may have a centrosymmetric structure in which the width of the notch 328 gradually decreases from the end remote from the third extension 323 to the end adjacent to the third extension 323 , and the corresponding first extension 321 , the outer edges of the second extension 322 are parallel, and the width gradually increases from the end remote from the third extension 323 to the end adjacent to the third extension 323 . In this way, the resistance of the end part away from the third extension part 323 is slightly increased to balance the resistance with the third extension part 323 (the resistance of the third extension part 323 is large), and the heat generation of the whole is further improved. balance.

In another embodiment, as shown in FIG. 1d, FIG. 1d is a schematic plan view of a heat generating assembly according to another embodiment of the present application, a notch 328 extends from the end remote from the third extension 323 to the third extension. It may be a centrosymmetric structure that gradually increases to the end adjacent to the extension 323, the outer edges of the corresponding first extension 321, second extension 322 are parallel, and the first extension 321, The width of the second extension 322 gradually decreases from the end remote from the third extension 323 to the end adjacent to the third extension 323 , thereby directing the high temperature of the heating element 32 to the middle upper portion of the heating element 32 . The resistance of the portion adjacent to the upper end of the heating element 32 is increased to accommodate the design needs of the concentrated heating scheme.

In another embodiment, as shown in FIG. 1e, FIG. 1e is a schematic plan view of a heat generating assembly according to yet another embodiment of the present application, wherein the first extension 321 and the second extension 322 are rectangular. , not in parallel and in parallel, but at a predetermined angle, for example, 3-10 degrees, where the notch 328 has a width extending from the end spaced apart from the third extension 323 to the third extension. It may be a centrosymmetric structure that tapers off to the end adjacent to portion 323 .
As shown in FIG. 2, the accommodation groove 311 has an open end and a closed end, and specifically, the accommodation groove 311 extends from the first end M to the second end N of the substrate 31. Extending and in one embodiment, the end of the receiving groove 311 remote from the second end N of the substrate 31 is an open end, and the end of the receiving groove 311 adjacent to the second end N of the substrate 31 is closed. By providing one end of the housing groove 311 as an open end, it is possible to prevent the problem of stress release during simultaneous sintering of the heating element 32 and the substrate 31. Such stress may compress the substrate 31, and if the first end M is an open end, further conductive ceramics can be easily connected to electrode leads (not shown). In this embodiment, the accommodation groove 311 is specifically a U-shaped structure, in this embodiment, the third extension 323 of the heating element 32 is provided at a position close to the closed end of the accommodation groove 311, and The substrate 31 has a pointed end adjacent the closed end, thereby facilitating insertion into the aerosol-forming substrate.

In another embodiment, as shown in FIG. 4, FIG. 4 is a schematic diagram of the location of the substrate and the heating element according to one embodiment of the present application, the end of the through-groove substrate 31 remote from the second end N. The end of the through-groove adjacent to the second end N of the substrate 31 is an open end. It may extend from the open end to form a pointed end, the specific structure is shown in FIG. That is, the accommodation groove 311 is a through hole.

Specifically, as shown in FIGS. 1a and 2, the heating element 32 may have a plate structure, specifically, a heating plate made of conductive ceramics, which is used as the heating plate. The resistivity of the ceramics can be 5* ^10-5 ohms, the design power can be 2 watts, and the resistance can be 0.71 ohms. That is, the first extending portion 321, the third extending portion 323 and the second extending portion 322 are connected in series in order (there is a groove in the middle).

In one embodiment, as shown in FIGS. 5 and 6, FIG. 5 is an exploded schematic view of a heating assembly according to one specific embodiment of the present application, and FIG. 6 is another specific embodiment of the present application. is an exploded schematic view of the heating assembly according to , further comprising an adhesive layer 34 on the adjacent portion of the substrate 31 and the heating element 32 to enhance the adhesion between the heating element 32 and the substrate 31, specifically: The adhesive layer 34 may be made of an appropriate inorganic glass-ceramic and integrally connected to the substrate 31 and the heating element 32 by co-firing. Specifically, the thickness of the adhesive layer 34 may be 0.05-0.1 millimeters, and of course, in other embodiments, a seamless joint is directly used between the substrate 31 and the heating element 32. may

In the specific implementation process, glass ceramics is applied and adhered to the outer circumference of the sintered heating element 32, then the heating element 32 is placed in the accommodation groove 311 of the sintered substrate 31, and then the substrate 31 and the heating element are heated. The heating element 32 is embedded in the housing groove 311 of the substrate 31 by secondary sintering the body 32 .
As shown in FIGS. 1a-5, in a specific embodiment, the heating assembly 30 further comprises a first electrode 33a and a second electrode 33b, wherein one of the first electrode 33a and the second electrode 33b is provided on the first extension portion 321, and the other electrode is provided on the second extension portion 322. are electrically connected, thereby electrically connecting the heating element 32 to the power assembly. Specifically, as shown in FIG. 3a, the first electrode 33a and the second electrode 33b are provided on the same side of the ends of the first extending portion 321 and the second extending portion 322, which are separated from the third extending portion 323, respectively. be done. In one specific embodiment, if the substrate 31 is a metal substrate, the first electrode 33a and the second electrode 33b may extend over the surface of the substrate 31 made of metal, thereby conducting the power supply. The substrate 31 made of metal is made to generate heat, and the heating efficiency is further improved.

In one specific embodiment, as shown in FIGS. 2, 5 and 6, the first surface C2 and _the first surface C of one of the first extension 321 and the second extension 322 are A _first electrode 33a is provided on each of the second surfaces _D2 provided on the opposite side to the second surface D2 of the other extension portion, and a second surface provided on the opposite side to the first surface _C2 and the first surface _C2 of the other extension portion. Each of _D2 is provided with a second electrode 33b, that is, the number of first electrodes 33a and second electrodes 33b is two. When connecting the first electrode 33a and the second electrode 33b to the two electrode lead wires, one Y-shaped electrode lead wire is connected to the first electrode 33a on both sides of the first extending portion 321, and the other Y-shaped electrode lead wire is connected to the first electrode 33a. A letter-shaped electrode lead wire may be connected to the second electrode 33b in the second extension 322, and the first electrode 33a and the second electrode 33b are provided on two surfaces to facilitate welding. In addition, the contact area with the conductive ceramic heating element 32 is increased as much as possible to reduce the contact resistance, so that when the heating element 32 is energized, less heat is generated, the temperature is lowered, and the conductive ceramic heating element When the two surfaces of 32 are energized at the same time, it is advantageous to form the same potential on the two surfaces and make the conductive component electric field between the two surfaces uniform, and the heating effect is better, so the first A mounting seat 40 may be provided at the position of the electrode 33a and the second electrode 33b (since the resistance at the first electrode 33a and the second electrode 33b of the heating element 32 is small, the heat generated is low), so that the mounting seat 40 can be used at a high temperature. 40 damage can be prevented.

Specifically, the first electrode 33a and the second electrode 33b may be formed at the two ends of the first extension portion 321 and the second extension portion 322 by coating, thereby coupling the electrodes and the heating element 32 together. The force is improved, thereby improving the connection stability between the electrode lead wire connected to the electrode and the heating element 32. As can be understood, the ceramic has a microporous structure, and the ceramic microporous structure allows the coating Even if the thickness is large, the bonding force between the first electrode 33a and the second electrode 33b formed and the heating element 32 can be strengthened. significantly improve the binding strength of Specifically, silver paste may be used as the coating material. As can be appreciated, the first electrode 33a and the second electrode 33b may be formed by depositing a metal film, such as gold, platinum, copper, etc., by depositing a metal material higher than 1*10 ⁻⁶ ohms. , the length of the application may specifically be 6.5 millimeters.

In a specific embodiment, as shown in FIG. 7 , FIG. 7 is a side view of a heating element according to one embodiment of the present application, a protective layer 35 may be further applied on the surface of the heating element 32 , and the protective layer 35 covers the first electrode 33a and the second electrode 33b to prevent the liquid formed when the cut tobacco is heated from damaging the first electrode 33a, the second electrode 33b and the heating element 32; Alternatively, the protective layer 35 may be a glass glaze layer. Moreover, the protective layer 35 may cover the entire substrate 31 so that the entire heating assembly 30 has a smooth surface, and of course, in other embodiments, the protective layer 35 covers the entire surface of the substrate 31 and the heating elements. 32 close to the substrate 31, thereby exposing the surface of the heating element 32 away from the substrate 31, thereby improving the smoothness of the surfaces of the substrate 31 and the heating element 32. In addition, the heating element 32 can directly contact the aerosol-forming substrate, further improving the heat utilization rate. and the substrate 31 , and the surface of the heating element 32 away from the substrate 31 is specifically an intermediate portion of the heating element 32 .

Specifically, as shown in FIG. 1a, the heating element 32 includes a first heating area A and a second heating area B connected to the first heating area A, wherein the first heating area A is the aerosol-forming substrate. The substrate 31 and the heating element 32 are thus at least partially inserted into the aerosol-forming substrate, the spray temperature of which is centered between 280° C. and 350° C., and the spray region Occupying 75% or more of the area, the second heating region B is the main matching section of the heating element 32 and has a temperature of 150° C. or less. is provided in the second heating area B of the heating element 32, thereby lowering the spray temperature of the ceramic heating element 32, and the heating temperature of the first heating area A and the heating temperature of the second heating area B of the heating element 32 ratio is greater than 2.

In one specific embodiment, the resistivity of the material of the portion of the heating element 32 located in the second heating region B is less than the resistivity of the material of the portion of the heating element 32 located in the first heating region A; As a result, the temperature of the first heating region A of the heating element 32 is made higher than the temperature of the second heating region B, and materials with different resistivities are provided in the different heating regions. Specifically, the main components of the ceramic material of the portion of the heating element 32 located in the first heating region A and the portion of the heating element 32 located in the second heating region B are substantially the same and integrated. Although molded, the portion of the heating element 32 located in the first heating region A and the portion of the heating element 32 located in the second heating region B have different ceramic material ratios or other components, thereby generating heat. A portion of the body 32 located in the first heat generating region A and a portion of the heat generating body 32 located in the second heat generating region B have different resistivities. Compared with the prior art, the solution that the first heating area A and the second heating area B use different conductive materials, such as aluminum film and gold film, and join the two different conductive materials, It is possible to effectively avoid the problem that the conductors of the first heating region A and the second heating region B of the heating element 32 are broken.

The heating assembly 30 according to the present embodiment is provided with a substrate 31 and a heating element 32 so that after being inserted into the aerosol-forming substrate, the heating element 32 heats the cut tobacco in the aerosol-forming substrate, and the heating element 32 is provided to include a first extending portion 321 and a second extending portion 322 connected to the first extending portion 321, and the first extending portion 321 and the second extending portion 322 of the substrate 31 and the heating element 32 are at least The substrate 31 and heating element of the present application are partially inserted into the aerosol-forming substrate and used to heat the aerosol-forming substrate by generating heat when energized, compared to conventional heating elements screen-printed on ceramic substrates. 32 can be directly and independently inserted into the aerosol-forming substrate, and there is no problem that the heating element 32 will fall off the ceramic substrate and cause failure when heated at high temperature, greatly improving the stability of the heating assembly 30, and A substrate 31 is provided and a heating element 32 is embedded within the substrate 31 to improve the strength of the heating assembly 30 and to allow forces to be received by the substrate 31 during insertion of the heating assembly 30 into the aerosol-forming substrate. , effectively avoid the problem of bending the heating element 32 due to receiving force.

In one embodiment, as shown in FIGS. 2 and 3a, the inner wall of the through-groove adjacent to the second surface _D1 of the substrate 31 has a thickness smaller than the thickness of the heating element 32 in the thickness direction of the heating element 32 . 1 flange 312 is provided, and specifically, the heating element 32 is overlaid and connected to the surface of the first flange 312 that is separated from the second surface _D1 of the substrate 31, so that it falls out of the through groove of the substrate 31. Specifically, one surface of the first flange 312 is flush with the second surface _D1 of the substrate 31, and can be integrally formed with the substrate 31. In this embodiment, specifically Alternatively, the stepped substrate 31 having the above-described first flange 312 may be formed by cutting the substrate 31 to a predetermined size with a laser, thus effectively ensuring the dimensional accuracy of the product, The supporting strength of the first flange 312 can be greatly improved.

In one specific embodiment, as shown in FIG. 2, the first flange 312 extends continuously along the inner wall surface of the entire through-groove along the circumferential direction of the through-groove, and the first flange 312 is heat-generating. The thickness of the body 32 is smaller than that of the heating element 32 in the thickness direction. However, if the through groove is a U-shaped groove, it may be understood that the first flange 312 is specifically a continuous U-shaped structure.

In one specific embodiment, as shown in FIGS. 1a and 2, the length of the substrate 31 is slightly greater than the length of the heating element 32, and the heating element 32 has a first heating area A and a second heating area B. can all be accommodated in the accommodation groove 311, and a first flange 312 is provided at each position corresponding to the first heat generation region A and the second heat generation region B of the heat generating element 32 on the inner wall surface of the through groove, Both the first heat generating region A and the second heat generating region B of the heat generating body 32 are overlapped and connected to the first flange 312 . Correspondingly, the temperature of the portion of the substrate 31 surrounding the first heat generating region A is higher than the temperature of the portion of the substrate 31 surrounding the first heat generating region A while the heating element 32 is energized to generate heat. In the structure shown in FIG. 2, the first heating area A and the portion of the substrate 31 surrounding the first heating area A are inserted into the aerosol-forming substrate to surround the second heating area B and the second heating area B of the substrate 31. The moieties are located outside the aerosol-forming matrix.

Specifically, the dimensions of the product (see FIG. 2) corresponding to the above embodiment can be specifically referred to FIGS. 8 and 9, and FIG. , and FIG. 9 is a C arrow view of the structure shown in FIG. Alternatively, the overall width W21 may be 3-6 millimeters, such as 5.00 millimeters, and the overall thickness H21 may be 0.3-0.6 millimeters, such as 0 5 millimeters, the width W22 of the first surface _C1 of the substrate 31 may be 0.5-1 millimeters, for example 0.75 millimeters, and the second width of the substrate 31 may be 0.75 millimeters. The width W23 of surface _D1 may be 1-2 millimeters, such as 1.25 millimeters, and in the example, the width of first flange 312 is 0.2-0.3 millimeters. For example, the length L22 of the heating element 32 mounted in the accommodation groove 311 may be 10-17 millimeters, for example, 16 millimeters. 0.1 mm, the width W24 may be 2-5 mm, for example 3.4 mm, and the length L23 of the first extension 321 and the second extension 322 may be It may be 12-16 millimeters, for example, 14.55 millimeters, and the distance L24 between the first extending portion 321 and the second extending portion 322 is less than 1/10 of the entire width of the heating element 32. The distance L24 between the first extending portion 321 and the second extending portion 322 may range from 0.25 to 0.35 millimeters, for example, the distance L24 between the two may be specifically 0.3 millimeters. There may be, thereby effectively ensuring the strength of the heating element 32 and avoiding the occurrence of short-circuit problems. Specifically, after the heating element 32 is accommodated in the accommodation groove 311, there is a gap between it and the inner wall surface of the accommodation groove 311, which facilitates the filling of the adhesive layer 34, and the width of the gap is specifically Typically, it may be 0.05-0.1 millimeters.

In another specific embodiment, as shown in FIG. 10a, FIG. 10a is a structural schematic diagram of a heating assembly according to another embodiment of the present application, wherein the heating element 32 in the first heating region A and the second heating region B Only the first heat generating region A of is housed in the housing groove 311, and the second heat generating region B may be provided in a suspended state. At this time, as shown in FIG. 10b, FIG. is inserted into an aerosol atomization substrate, with substrate 31 fully inserted into aerosol-forming substrate 302 and heating element 32 still partially inserted into aerosol-forming substrate 302. Specifically, only the first heating region A of most or all of the heating element 32 is inserted into the aerosol-forming substrate 302 , and the portion corresponding to the second heating region B is the aerosol-forming substrate 302 . , i.e., not inserted into the aerosol-forming substrate 302 , or both the first heating area A and the minor second heating area B of the heating element 32 are within the aerosol-forming substrate 302 . Although inserted, most of the portion corresponding to the second exothermic region B is outside the aerosol-forming substrate 302, and in that embodiment, as shown in FIGS. 5 and 11, FIG. FIG. 11 is a structural schematic view of a heating assembly according to another embodiment, in which a first protrusion 3211 and a first projection 3211 and 3211 are provided on opposite sides of a portion of a first extension portion 321 and a second extension portion 322 located in a second heating region B; By having the second protrusions 3221, the width of the portion of the heating element 32 located in the second heating region B is made larger than the width of the portion located in the first heating region A of the heating element 32. The strength of the heating region B is secured, the resistance of the second heating region B of the heating element 32 is made smaller than the resistance of the first heating region A, and the temperature corresponding to the second heating region B of the heating element 32 is lowered. . Specifically, the length L21 of the substrate 31 is less than the length L22 of the heating element 32 in this embodiment.

Specifically, the first protrusion 3211 and the second protrusion 3221 respectively abut the edge of the substrate 31, and in one specific embodiment, the width W25 of the first protrusion 3211 and the second protrusion 3221 is may be the same as the width W26 of the opposing side walls of the accommodation groove 311, and the opposing side walls of the accommodation groove 311 are two extensions of the substrate 31 that are provided in parallel with a space therebetween. In the embodiment, as shown in FIG. 5, a second flange 313 flush with the first flange 312 is provided at the ends of the first extending portion 321 and the second extending portion 322 spaced apart from the third extending portion 323 . A first retraction portion 324 corresponding to the second flange 313 is provided at a position corresponding to the second flange 313 of the first projection portion 3211 and the second projection portion 3221 , and the first retraction portion 324 is provided at the position corresponding to the second flange 313 . , the second flange 313 supports the second heating region B of the heating element 32 .

In another embodiment, as shown in FIG. 3a, the heating element 32 is entirely housed within the housing groove 311, and the first flange 312 is located only near the first end M of the inner wall surface of the housing groove 311. Specifically, the first flanges 312 include two, the two first flanges 312 are provided to face the two inner wall surfaces of the receiving groove 311, and the first end M of the substrate 31 located in close proximity.

Specifically, when the heat generating element 32 is entirely accommodated in the accommodating groove 311, two first flanges are provided only at positions corresponding to the second heat generating regions B of the heat generating element 32 on the inner wall surface of the accommodating groove 311. 312 is provided, and the portion of the second heating region B of the heating element 32 is overlapped and connected to the two first flanges 312, at this time, as shown in FIG. 3b, FIG. Schematic illustration of the assembly being inserted into an aerosol atomization substrate, with substrate 31 partially inserted into aerosol-forming substrate 302 and heating element 32 still partially inserted into aerosol-forming substrate 302, specifically , only the portion corresponding to the first heating region A of the heating element 32 is inserted into the aerosol-forming substrate 302, and there is no need to support the first heating region A of the heating element 32 with the substrate 31, thereby generating heat. The portion of the body 32 corresponding to the second heating region B and the substrate 31 at the corresponding position are partially outside the aerosol-forming substrate 302, i.e. not inserted into the aerosol-forming substrate 302, and in certain embodiments 6, the thickness of the heating element 32 is the same as the thickness of the substrate 31, and two flanges 312 corresponding to the two first flanges 312 are formed in the portion of the heating element 32 located in the second heating region B. A second retraction portion 325 is provided, and the two second retraction portions 325 are overlapped and connected to the two first flanges 312 .

Of course, in other embodiments, when only the first heat generating region A of the first heat generating region A and the second heat generating region B of the heating element 32 is accommodated in the accommodation groove 311, heat is generated on the inner wall surface of the accommodation groove 311. Two first flanges 312 are provided only at a position corresponding to a part of the first heat generating region A of the body 32 , and the portion of the heat generating body 32 located in the first heat generating region A overlaps the two first flanges 312 . are connected together.

In a specific embodiment, the structural dimensions of the heating element 32 corresponding to FIG. 3a can be specifically referred to FIG. 12, which is a schematic diagram of the dimensions of the heating assembly according to another embodiment of the present application; In such an embodiment, the overall length L21 of the substrate 31 may still be 15-20 millimeters, such as 18.00 millimeters, and the overall width W21 may be 3-6 millimeters, such as 5.00 mm, the total thickness H21 may be 0.3-0.6 mm, for example 0.5 mm, the thickness of the first surface _C1 of the substrate 31 The width W22 may be 0.5-1 mm, such as 0.75 mm, and the width W23 of the second surface _D1 of the substrate 31 may be 1-2 mm, such as , may be 1.25 millimeters, and in the example, the thickness H22 of the first flange 312 may be 0.2-0.3 millimeters, such as 0.25 millimeters. , the length L25 of the first flange 312 may be 5-6 millimeters, such as 6.00 millimeters, and the length L22 of the heating element 32 mounted in the receiving groove 311 may be 10-17 millimeters. mm, for example 16.1 mm, and the width W24 of the portion overlapped and connected to the first flange 312 may be 2-5 mm, for example 3.4 mm. and the width W27 of the portion engaged between the first flanges 312 may be 2-3 millimeters, for example 2.4 millimeters, and the first extension 321 and the second The length L23 of the second extension 322 may be 13-16 millimeters, such as 14.55 millimeters, and the distance L4 between the first extension 321 and the second extension 322 is the length of the heating element 32. less than 1/10 of the total width, and the distance L24 between the first extending portion 321 and the second extending portion 322 may be in the range of 0.25-0.35 millimeters, for example, the distance L24 between the two may be Specifically, it may be 0.3 millimeters. is the same as the thickness H22 of the first flange 312 . Specifically, the error range of each dimension is 0.05 mm or less.

In a specific embodiment, as shown in FIGS. 13 to 16, FIG. 13 is a structural schematic diagram after assembling a mounting seat and a heat generating assembly according to an embodiment of the present application, and FIG. FIG. 15 is a schematic exploded view of a corresponding product, FIG. 15 is a structural schematic view after assembling a mounting seat and a heat-generating assembly according to another embodiment of the present application, and FIG. 16 is an exploded schematic view of the product corresponding to FIG. 2, the heat generating assembly 30 is further provided with a mounting seat 40, in a specific embodiment, the heat generating assembly 30 is mounted on the mounting seat 40 to form a heat generating mechanism when in use, and the mounting seat 40 is the heat generating assembly 30, the heat generating assembly 30 is mounted in the main body of the aerosol forming device by means of the mounting seat 40, specifically, the mounting seat 40 is positioned corresponding to the second heat generating region B of the heat generating assembly 30. After being fixed and inserted into the aerosol-forming substrate 302 , the bottom end of the aerosol-forming substrate 302 abuts the upper surface of the mounting seat 40 .

Specifically, the mounting seat 40 may be made of an organic or inorganic material having a melting point of 160° C. or higher, such as a PEEK material. It may be glued to assembly 30 and the adhesive may be a high temperature resistant glue.

In one embodiment, as shown in FIGS. 13 and 14, the mounting seat 40 includes a mounting body 41, the mounting body 41 is provided with a mounting hole 42, and the heat generating assembly 30 is specifically positioned within the mounting hole 42. When the heating element 32 of the heating assembly 30 is fixed to the mounting seat 40, the portion corresponding to the second heating area B of the heating element 32 is the same. Specifically, the side wall of the mounting hole 42 is provided with an avoidance groove. Specifically, the electrode lead wire is extended into the mounting seat 40 by the avoidance groove and connected to the electrode of the heating element 32. connected to Moreover, the mounting body 41 is further provided with at least two engaging portions 43 , and the mounting seat 40 is specifically fixed to the housing of the aerosol forming device via the engaging portions 43 .

Furthermore, as shown in FIG. 16 , an extension groove 44 communicating with the attachment hole 42 may be further provided on one side of the attachment body 41 , and the extension groove 44 is specifically for the third extension of the heating element 32 . The extension groove 44 may be provided on the side opposite to the portion 323, and the extension groove 44 matches the shape of the portion for being inserted into the mounting seat 40 of the heat generating assembly 30, for example, the mounting seat of the heat generating assembly 30. If the shape of the portion inserted into the heating assembly 40 is rectangular, the shape of the extending groove 44 is also rectangular, so that the extending groove 44 reinforces the portion of the heat generating assembly 30 that is inserted into the mounting seat 40 and prevents breakage thereof. To prevent. In one specific embodiment, the mounting seat 40 is provided with two extending grooves 44, and the two extending grooves 44 are vertically provided to intersect.

In one specific embodiment, as shown in FIG. 17 , FIG. 17 is a front view after assembling the mounting seat and the heat generating assembly according to one embodiment of the present application, wherein the mounting seat 40 of the heat generating assembly 30 is attached to the mounting seat 40 . It has a first locking structure 326 on the surface of the part to be inserted, and has a second locking structure 327 at a position corresponding to the first locking structure 326 in the mounting hole 42 of the mounting seat 40 . The fixing between the seat 40 and the heat generating assembly is realized by the engagement of the first locking structure 326 and the second locking structure 327, further improving the stability of the connection. The first locking structure 326 may specifically be a plurality of protrusions (or recesses), and the second locking structure 327 may be a recess (or protrusion) matching the first locking structure 326. . Specifically, when the heating element 32 of the heating assembly 30 is fixed to the mounting seat 40 , the first locking structure 326 is inserted into the mounting seat 40 of the first extending portion 321 and the second extending portion 322 of the heating element 32 . Specifically, when the substrate 31 of the heat generating assembly 30 is fixed to the mounting seat 40 , the first locking structure 326 is inserted into the mounting seat 40 of the substrate 31 . It may be provided on the surface of the part to be coated (see FIG. 17).

The heating assembly 30 according to this embodiment can directly use a self-supporting ceramic heating plate (or heating rod) as its heating form, and the heating element 32 can be changed according to the requirements of the electrode arrangement position and resistance value. Also, the heating element 32 may be provided in a single series connection type, and the heating element 32 is made of a ceramic material and may be a conventional metallic heating element or a heating element formed by applying a metallic heating material on a ceramic substrate. , both sides can contact the cut tobacco at the same time to heat the cut tobacco, which enhances the heating uniformity and stability.

As shown in FIG. 18 , FIG. 18 is a structural schematic diagram of an aerosol-forming device according to an embodiment of the present application, which provides an aerosol-forming device 300 , which includes a housing 301 , a housing It includes a heat generating assembly 30, a mounting seat 40 and a power supply assembly 50 installed in 301;
The heat-generating assembly 30 is provided on the mounting seat 40 and fixedly mounted on the inner wall surface of the housing 301 via the mounting seat 40. Specifically, the specific structures and functions of the heat-generating assembly 30 and the mounting seat 40 , the text description in the relevant embodiment of the heat-generating assembly 30 according to the above embodiment can be referred to, detailed description is omitted here, the power supply assembly 50 is connected to the heat-generating assembly 30 and used to power the heat-generating assembly 30 . , and in one embodiment, power supply assembly 50 may specifically be a rechargeable lithium-ion battery.

According to the aerosol-forming device 300 of this embodiment, the heating assembly 30 is provided to heat and spray the aerosol-forming substrate 302 after being inserted into the aerosol-forming substrate 302 , and the heating assembly 30 connects the substrate 31 and the heating By being provided to include body 32 , heating element 32 heats cut tobacco within aerosol-forming substrate 302 after being inserted into aerosol-forming substrate 302 , and heating element 32 is positioned between first extension 321 and first extension 321 . and a second extension 322 connected to the extension 321 , and the first extension 321 and the second extension 322 of the substrate 31 and the heating element 32 are at least partially inserted into the aerosol-forming substrate 302 . and is used to heat the aerosol-forming substrate 302 by generating heat when energized. It can be inserted directly and independently, and there is no problem that the heating element 32 will fall off from the ceramic substrate when it heats up to a high temperature, causing a failure. By embedding the heating element 32 in the substrate 31, the strength of the heating assembly 30 is improved, and a force can be received by the substrate 31 during insertion of the heating assembly 30 into the aerosol-forming substrate 302, thereby generating heat due to the force receiving. To effectively avoid the problem of bending the body 32.

Although the embodiments of the present application have been described above, the patent scope of the present application is not limited. Any equivalent structure or equivalent process conversion made using the contents of the specification and drawings of the present application, or any direct or indirect application to other related technical fields, is also covered by the patent protection scope of the present application.

Claims (20)

A heat generating assembly,
a substrate;
a heating element embedded in the substrate, the heating element including a first extending portion provided with a space therebetween and a second extending portion connected to one end of the first extending portion; and a heating assembly, wherein the heating element is at least partially inserted into the aerosol-forming substrate and used to heat the aerosol-forming substrate by generating heat when the first extension and the second extension are energized. An accommodation groove is provided in the substrate, at least a portion of the heat generating element is accommodated in the accommodation groove, the first extending portion and the second extending portion are provided in parallel with a space therebetween, and the heat generating element further comprising a third extension fully inserted into the aerosol-forming substrate for heating said aerosol-forming substrate, and wherein adjacent ends of said first and second extensions are routed through said third extension; 2. The heat generating assembly of claim 1, wherein the heat generating assembly is connected by The substrate has a first surface and a second surface provided opposite to the first surface, and the accommodation groove is a through groove penetrating the first surface and the second surface, thereby 3. The heating assembly of claim 2, wherein the heating elements are exposed from the first side and the second side, respectively. The through groove has an open end and a closed end facing the open end, and the third extension is provided at the position of the open end and extends from the open end to form a sharp end. 4. The heat generating assembly of claim 3. The through groove has an open end and a closed end facing the open end, and the third extending portion is provided at a position close to the closed end and close to the closed end of the substrate. 4. The heat generating assembly of claim 3, having sharp ends. 6. The heat generating assembly according to claim 5, wherein a first flange is provided on an inner wall surface adjacent to the second surface of the through groove, and the heating element is overlapped and connected to the first flange. The first flange extends along the circumferential direction of the through groove, the heating element includes a first heating region and a second heating region connected to the first heating region, the first heating region and 7. The heat generating assembly according to claim 6, wherein only said first heat generating area of said second heat generating area is received within said receiving groove and is overlapped and connected to said first flange. A portion of the first extending portion and the second extending portion located in the second heat generation region has a first projection portion and a second projection portion provided on opposite sides of each other, and the first projection portion and the second projection portion are provided on opposite sides. 8. The heat generating assembly of claim 7, wherein two protrusions each abut an edge of the substrate. A second flange is provided at an end of the substrate that abuts on the first protrusion and the second protrusion, and a first retraction is made to a position corresponding to the second flange of the first protrusion and the second protrusion. 9. The heat generating assembly of claim 8, wherein a portion is provided and said first recess is overlappingly connected to said second flange. The heat generating element includes a first heat generating area and a second heat generating area connected to the first heat generating area. The two first flanges are provided only at positions corresponding to the second heat generating regions, and a portion of the heating element located in the second heat generating regions is overlapped and connected to the two first flanges. 7. The heat generating assembly according to 6. Two second retracted portions corresponding to the two first flanges are provided in a portion of the heating element located in the second heat generating region, and the two second retracted portions overlap the two first flanges. 11. The heat generating assembly of claim 10, mated. 11. The heating assembly of claim 10, wherein the ratio of the heating temperature of the first heating area to the heating temperature of the second heating area is greater than two. The heat generating assembly further includes a first electrode and a second electrode, wherein one of the first electrode and the second electrode is provided at an end of the first extension spaced apart from the third extension. 2. The heat generating assembly of claim 1, wherein the other electrode is provided at an end of the second extension remote from the third extension. The electrode is provided on each of the first surface of the first extending portion and the second surface facing the first surface, and the first surface of the second extending portion and the second surface facing the first surface are provided. 14. The heating assembly of claim 13, wherein each is provided with said electrode. The heating assembly is applied to the surface of the heating element and covers the first electrode and the second electrode, or is applied to the entire surface of the substrate and the surface of the heating element adjacent to the substrate. 14. The heating assembly of claim 13, further comprising a protective layer exposing a surface of the heating element spaced apart from the substrate. 2. The heating assembly of claim 1, wherein the heating element is a heating plate, and the spacing between the first extension and the second extension of the heating element is 0.25-0.35 millimeters. The heating element includes a main component and a crystal component, the main component being one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, and titanium, and the crystal component being manganese. 2. The heat generating assembly of claim 1, wherein the heat generating assembly is one or more of lanthanum acid, lanthanum strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, and yttrium oxide. 2. The heating assembly according to claim 1, wherein said substrate is insulating ceramics, and an adhesive layer is provided between said substrate and said heating element for bonding said substrate and said heating element. The heating element and the substrate are flat, and the top and bottom surfaces of the heating element are flush with the first and second surfaces of the substrate or protrude beyond the first and second surfaces of the substrate. 4. The heat-generating assembly of claim 3, wherein the heat-generating assembly is hollow or recessed. An aerosol forming apparatus comprising a housing, a heat generating assembly provided in the housing and a power assembly, the power assembly being connected to the heat generating assembly and used to power the heat generating assembly, the heat generating assembly comprising: An aerosol-forming device, which is the heat-generating assembly of paragraph 1.