CN114246370A

CN114246370A - Heating element and aerosol forming device

Info

Publication number: CN114246370A
Application number: CN202011010188.XA
Authority: CN
Inventors: 张琳; 王守平; 张幸福; 西克宇; 孙来; 谷岩
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2022-03-29
Also published as: JP7509929B2; JP2023532220A; EP4218439A4; WO2022062341A1; KR20230009985A; EP4218439A1

Abstract

The application provides a heating element and aerosol-forming device. The heating component comprises a substrate and a heating body; the heating element is embedded in the substrate and comprises first extending parts arranged at intervals and second extending parts connected with one ends of the first extending parts, and the substrate and the heating element are used for being at least partially inserted into the aerosol forming substrate and generating heat to heat the aerosol forming substrate when the first extending parts and the second extending parts are electrified. The heating element in the heating component can be directly inserted into the aerosol formation substrate, and the stability is good.

Description

Heating element and aerosol forming device

Technical Field

The invention relates to the technical field of heating non-combustion smoke generating equipment, in particular to a heating component and an aerosol forming device.

Background

Electronic cigarettes are used as cigarette substitutes, and are more and more concerned and favored by people due to the advantages of safe, convenient, healthy, environment-friendly and the like; for example, the electronic cigarette is not heated to burn, which is also called a heating non-combustion aerosol forming apparatus.

The heating mode of the existing heating non-combustible aerosol forming device is generally tubular peripheral heating or central embedded heating; tubular peripheral heating means that a heating tube is wrapped around the outside of an aerosol-forming substrate (e.g. tobacco) to heat the aerosol-forming substrate, and central embedded heating is the insertion of a heating element into the aerosol-forming substrate to heat the aerosol-forming substrate. Among them, the heating element is widely used because of its characteristics such as simple manufacture and convenient use. The existing heating component is mainly formed by adopting ceramic or metal subjected to insulation treatment as a substrate, then printing or coating a resistance heating circuit on the substrate, and fixing the resistance heating circuit on the substrate after high-temperature treatment.

However, since the resistive heating circuit on the conventional heating element is a thin film that is post-printed or plated on the ceramic substrate, the resistive heating circuit is easily detached from the substrate due to the curved shape of the substrate when heated at high temperature in the use process of inserting the heating element into the aerosol-forming substrate many times, and is poor in stability, and the resistive heating circuit is in contact with only the aerosol-forming substrate on the side of the substrate where the resistive heating circuit is provided, but not with the aerosol-forming substrate on the back of the substrate, thereby causing poor heating uniformity of the aerosol-forming substrate.

Disclosure of Invention

The application provides a heating element and aerosol forming device, and this heating element can solve the resistance heating circuit on the current heating element and when generating heat through high temperature, drops on the basement easily, the relatively poor problem of stability.

In order to solve the technical problem, the application adopts a technical scheme that: a heat generating component is provided. The heating component comprises a substrate and a heating body; the heating element is embedded in the substrate and comprises first extension parts arranged at intervals and second extension parts connected with one ends of the first extension parts, and the substrate and the heating element are used for being at least partially inserted into the aerosol forming substrate and generating heat to heat the aerosol forming substrate when the first extension parts and the second extension parts are electrified.

In order to solve the above technical problem, another technical solution adopted by the present application is: an aerosol-forming device is provided comprising a housing and a heat generating component and a power supply component disposed within the housing; the power supply assembly is connected with the heating assembly and used for supplying power to the heating assembly, and the heating assembly is the heating assembly.

According to the heating component and the aerosol forming device, the heating component is provided with the substrate and the heating body, so that tobacco in the aerosol forming substrate is heated through the heating body after the aerosol forming substrate is inserted; meanwhile, the heating body is arranged to comprise a first extension part and a second extension part connected with the first extension part, and the base plate and the first extension part and the second extension part of the heating body are used for at least partially inserting the aerosol-forming substrate and generating heat to heat the aerosol-forming substrate when electrified; compared with the heating element printed on the ceramic substrate in the prior art, the substrate and the heating element can be directly and independently inserted into the aerosol to form the substrate, the problem that the heating element falls off from the ceramic substrate to cause failure when heated at high temperature is avoided, and the stability of the heating component is greatly improved; in addition, through setting up the base plate, inlay the heat-generating body in locating the base plate to improve heating element's intensity, make heating element insert the aerosol and form the in-process of matrix, can pass through the base plate atress, effectively avoided the heat-generating body because of the problem that the atress leads to buckling.

Drawings

Fig. 1a is a schematic structural diagram of a heat generating component according to an embodiment of the present application;

FIG. 1b is a schematic view of a heat-generating body according to an embodiment of the present application;

FIG. 1c is a schematic plan view of a heat generating component according to an embodiment of the present disclosure;

FIG. 1d is a schematic plan view of a heat-generating component according to another embodiment of the present application;

FIG. 1e is a schematic plan view of a heat-generating component according to yet another embodiment of the present application;

FIG. 2 is a disassembled schematic view of the structure shown in FIG. 1a according to an embodiment of the present disclosure;

FIG. 3a is a disassembled schematic view of the structure shown in FIG. 1a according to another embodiment of the present application;

FIG. 3b is a schematic illustration of a heat generating component inserted into an aerosol atomizing substrate according to one embodiment of the present application;

FIG. 4 is a schematic view showing a position between a substrate and a heating element according to an embodiment of the present application;

FIG. 5 is a disassembled schematic view of a heat generating component according to an embodiment of the present application;

FIG. 6 is a disassembled schematic view of a heat generating component according to another embodiment of the present application;

FIG. 7 is a side view of a heat-generating body provided in an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating the dimensions of a heat generating component according to an embodiment of the present disclosure;

FIG. 9 is a view in the direction C of the structure shown in FIG. 8;

fig. 10a is a schematic structural diagram of a heat generating component according to another embodiment of the present application;

FIG. 10b is a schematic view of a heat generating component inserted into an aerosol atomizing substrate according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of a heat generating component according to yet another embodiment of the present application;

FIG. 12 is a schematic diagram of a heat generating component according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a mounting base and a heat generating component according to an embodiment of the present application after being assembled;

FIG. 14 is a disassembled view of the product corresponding to FIG. 13;

fig. 15 is a schematic structural diagram of a mounting base and a heat generating component according to another embodiment of the present application after being assembled;

FIG. 16 is a disassembled view of the product corresponding to FIG. 15;

FIG. 17 is a front view of a mounting base and a heat generating component after assembly according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of an aerosol-forming device according to an embodiment of the present application.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, 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 are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

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

Referring to fig. 1a to fig. 3a, in which fig. 1a is a schematic structural diagram of a heating element 30 according to an embodiment of the present application; FIG. 2 is a disassembled schematic view of the structure shown in FIG. 1a according to an embodiment of the present disclosure; FIG. 3a is a disassembled schematic view of the structure shown in FIG. 1a according to another embodiment of the present application; in the present embodiment, a heat generating component 30 is provided, the heat generating component 30 being particularly for inserting and heating an aerosol-forming substrate; for example, in one embodiment, the heating element 10 is particularly adapted for insertion into tobacco for heating the tobacco, as exemplified by the following embodiments; it will be appreciated that in this embodiment, the aerosol-forming substrate may specifically be tobacco.

Specifically, the heat generating component 30 includes a substrate 31 and a heat generating body 32 embedded in the substrate 31.

The substrate 31 may be a rectangular substrate 31 having a first end M and a second end N opposite to the first end M; when the heating element 30 is inserted into the aerosol-forming substrate, the second end N of the base plate 31 is inserted into the aerosol-forming substrate first, and therefore, in order to facilitate the insertion of the heating element 30 into the aerosol-forming substrate, the second end N of the base plate 31 may be specifically configured as a tip, that is, in a triangular structure, and an included angle formed by two adjacent sides of the tip may be specifically 45 degrees to 90 degrees, for example, 60 degrees.

Specifically, the substrate 31 may be made of insulating ceramic, the thermal conductivity of the substrate 31 made of insulating ceramic may be 4-18W/(m.k), the bending strength may be more than 600MPa, the thermal stability may exceed 450 degrees, and the fire resistance may be higher than 1450 degrees. Of course, in other embodiments, the substrate 31 may also be a metal that is processed by insulation, for example, a metal substrate that is provided with an insulating coating, so as to improve the strength of the heating element 30, prevent the heating element 30 from bending or breaking, and simultaneously diffuse the heat generated by the heating element 32 to the tobacco that is in contact with the substrate 31, thereby improving the uniformity of heating of the tobacco in the aerosol-forming substrate. The material of the substrate 31 can also be a novel composite zirconia material, and the novel composite zirconia substrate 31 can keep warm and transfer heat to the heat generated by the heating element 32 to provide the energy utilization rate of the heating component 30. The ceramic substrate 31 may also be ZTA material (zirconia toughened alumina ceramic) or MTA (mullite and alumina composite).

In an embodiment, the substrate 31 is provided with a containing groove 311 along the length direction thereof, and at least a portion of the heating element 32 is contained in the containing groove 311, so that when the heating element 30 is inserted into the aerosol-forming substrate, the substrate 31 is stressed to avoid the problem of bending of the heating element 32 due to direct stress.

Specifically, the substrate 31 has a first surface C₁And with the first surface C₁Oppositely arranged second surface D₁The receiving cavity 311 may specifically penetrate through the first surface C₁And a second surface D₁The heating body 32 is specifically accommodated in the through groove, and the upper and lower surfaces of the heating body 32 and the first surface C of the substrate 31₁And a second surface D₁Leveling; by configuring the accommodating groove 311 as a through groove structure, the heating elements 32 accommodated in the accommodating groove 311 can be respectively arranged from the first surface C of the substrate 31₁And a second surface D₁Is exposed, so that two surfaces of the heating body 32 can be in direct contact with tobacco in the aerosol-forming substrate after the heating body 32 is inserted into the aerosol-forming substrate, the energy utilization rate is high, the heating is uniform, and the boundary of the preset temperature field is clear.

In other embodiments, the upper and lower surfaces of the heating element 32 may be slightly protruded from the first surface C of the substrate 31 according to the actual need of the temperature field distribution during heating₁And a second surface D₁Or respectively slightly lower than the first surface C of the substrate 31₁And a second surface D₁Thus, the upper and lower surfaces of the heating element 32 are slightly protruded from the first surface C of the substrate 31₁And a second surface C₂During the process, the higher temperature of the heating element 32 can be concentrated on the upper surface and the lower surface of the heating element 32, and the upper surface and the lower surface of the heating element are baked at higher temperature to be contacted with tobacco, so that the smoke can meet stronger requirements; and the upper and lower tables of the heating element 32A surface slightly lower than the first surface C of the substrate 31₁And a second surface C₂In the process, due to the blocking effect of the substrate 31, the contact between the upper surface and the lower surface of the heating body 32 and tobacco is loose, the baking temperature of the heating body 32 to the tobacco can be slightly reduced, and the requirement of soft smoke is met.

The heating element 32 may be a self-supporting structure, that is, the heating element 32 can exist independently without being attached to other carriers; compared with the existing resistance heating film layer formed by printing or coating on the ceramic substrate, the heating element 32 with the self-supporting structure can effectively avoid the problem that the heating element 32 falls off from the ceramic substrate or the metal substrate when the heating element generates heat at high temperature or the substrate deforms, and greatly improves the stability of the heating component 30; and since the heating element 32 is a self-supporting structure, it can be simultaneously supported from the first surface C of the substrate 31₁And a second surface D₁One side of the heat pipe is exposed, so that the heat utilization rate and the heating uniformity are effectively improved.

Wherein, the material of heat-generating body 32 specifically can be conductive ceramic, compares in current metal material, and this conductive ceramic material's heat-generating body 32 conduction efficiency is higher, and the temperature that generates heat and produce is comparatively even: the conductive ceramic heating element 32 can be adjusted and designed at 3-4W, and the conductivity can reach 1 x 10-⁴Ohm 1 x 10-⁶Ohm is suitable for low-voltage start, so that the power is controlled and designed in real time, the bending strength of the conductive ceramic can be more than 40MPa, and the fire resistance can be higher than 1200 ℃.

Specifically, the heating element 32 made of the conductive ceramic is made of a material which can select an electromagnetic heating wavelength as a middle infrared wavelength, so that the tobacco tar can be atomized, and the taste can be improved; in addition, the crystalline phase structure of the conductive ceramic heating element 32 is high-temperature stable oxide ceramic, and the oxide ceramic has good fatigue resistance, high strength and high density, so that the problems of volatilization of harmful heavy metals and dust can be effectively avoided, and the service life of the heating element 32 is greatly prolonged.

The ceramic integral heating body 32 is adopted, so that the area of the highest temperature hot spot can be reduced, the risks of fatigue cracking and fatigue resistance increase are eliminated, and the consistency is better; and because of the high strength of the ceramic heating material and the smoothness brought by the microcrystalline structure, the surface of the heating element 32 is easy to clean and not easy to adhere; in addition, the ceramic heating element 32 is manufactured by adopting a ceramic production process, the ceramic process mainly comprises the working procedures of raw material mixing, molding, sintering and cutting, the process is simple and convenient to control, the cost is low, and the popularization of production and the improvement of economic benefits are facilitated.

Specifically, the heating element 32 made of the conductive ceramic specifically includes a main component and a crystal component; the main component is used for conducting electricity and enabling the conductive ceramic to form a certain resistance, and the main component can be one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon and titanium; the crystal component, i.e., the main material of the ceramic material, is mainly used for forming the shape and structure of the conductive ceramic, and may be one or more of lanthanum manganate, lanthanum strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, and yttrium oxide. In other embodiments, the heating element 32 may be made of a metal alloy or a ceramic alloy made of an iron-silicon-aluminum alloy.

Specifically, referring to fig. 1b, fig. 1b is a schematic structural diagram of a heating element provided in an embodiment of the present application; in an embodiment, the heat generating body 32 particularly comprises a first extension 321 and a second extension 322 connected to the first extension 321, and in a particular embodiment, the first extension 321 and the second extension 322 are each for being at least partially inserted into the aerosol-forming substrate and generating heat when energized to heat the aerosol-forming substrate; it can be understood that the first extension portion 321 and the second extension portion 322 can be independently and directly inserted into the aerosol-forming substrate, while the existing heating element screen-printed on the ceramic substrate can be inserted into the aerosol-forming substrate only by means of the ceramic or the metal substrate processed by insulation, and cannot be directly inserted into the aerosol-forming device, and the first extension portion 321 and the second extension portion 322 provided by the present application cannot cause the problem that the substrate 31 is deformed or falls off from the substrate 31 when heated at high temperature to cause failure, thereby greatly improving the reliability of the heating element 10.

In particular, the first extension 321 and the second extension 322 are for insertion into the aerosol-forming substrate with both opposing surfaces in contact with the aerosol; it can be understood that, since the heating element 32 of the present application is directly inserted into the aerosol-forming substrate without the aid of a substrate, at least two opposite surfaces of the first extension 321 and the second extension 322 of the heating element 32 can be directly contacted with the aerosol, thereby greatly improving heat utilization efficiency and heating efficiency.

In another embodiment, referring to fig. 1a to 3a, the heat generating body 32 further comprises a third extension 323 for fully inserting and heating the aerosol-forming substrate; specifically, in this embodiment, the first extension 321 and the second extension 322 are arranged in parallel and spaced, and the ends of the first extension 321 and the second extension 322 that are close to each other are connected by the third extension 323; wherein the end of the first extension 321 adjacent to the second extension 322 is specifically the end that is first contacted with the aerosol-forming substrate and inserted; it is understood that the first, second and

third extension portions

321, 322 and 323 are formed in a substantially U-shaped configuration; in a specific embodiment, the first extension 321, the second extension 322, and the third extension 323 are made of conductive ceramic and are integrally formed and sintered; specifically, the heat-generating body 32 having the first and second extending

portions

321 and 322 and the third extending portion 323 can be obtained by cutting the heat-generating body 32 substrate 31 by laser cutting to form the cutting groove 328. It is to be understood that the heat-generating body 32 may be directly formed by sintering.

The shapes of the first extension 321, the second extension 322, and the third extension 323 are not limited, and may be designed according to actual needs. Specifically, the first extension 321 and the second extension 322 may be elongated plates; since the base plate 31 has a tip, the third extending portion 323 may be an arc-shaped plate, the inner circle radius thereof may be 0.5 mm, and the outer circle radius thereof may be 2 mm; here, the outer ring refers to a position where the third connecting portion 323 of the heating element 32 contacts the substrate 31. The arc-shaped plate has the advantages of small connecting stress with the first extension part 321 and the second extension part 322 and better overall structural strength.

In the present embodiment, the third extension part 323 has a substantially V-shape. In other embodiments, the third extension 323 may also be U-shaped or isosceles trapezoid, or another shape with a width gradually decreasing from an end close to the first extension 321 and the second extension 322 to a direction away from the first extension 321 and the second extension 322. In the present embodiment, the first extension 321, the second extension 322 and the third extension 323 define a slot 328, and the slot 328 is a rectangle with a uniform width or a convex arc at one end of the rectangle near the third extension 323; specifically, the slot 328 has an axisymmetric structure, the longitudinal direction of the slot is parallel to the direction of the central axis thereof, the first extension 321 and the second extension 322 are arranged in parallel at intervals, the longitudinal direction of the first extension 321 and the second extension 322 is parallel to the direction of the central axis of the slot 328, and the width direction of the first extension 321, the second extension 322 and the third extension 323 is perpendicular to the direction of the central axis of the slot 328. The heating element 32 is symmetrical about the central axis of the cutting groove 328, that is, the first extension 321, the second extension 322 and the third extension 323 are all symmetrical about the central axis of the cutting groove 328, so that the temperatures of the corresponding positions in the width direction of the first extension 321, the second extension 322 and the third extension 323 at both sides of the cutting groove 328 are consistent, and the taste of the smoke is better.

In other embodiments, referring to fig. 1c, fig. 1c is a schematic plan view of a heat generating component provided in an embodiment of the present application; the first extension portion 321 and the second extension portion 322 are also arranged side by side, but the width of the slot 328 may be a centrosymmetric structure gradually decreasing from one end far away from the third extension portion 323 to one end near the third extension portion 323, the outer sides of the first extension portion 321 and the second extension portion 322 are parallel, and the width gradually increases from one end far away from the third extension portion 323 to one end near the third extension portion 323. This slightly increases the resistance at the end away from the third extension 323, so as to balance the resistance with the third extension 323 (the resistance of the third extension 323 is large), and thus the overall heat generation is more uniform.

In other embodiments, referring to fig. 1d, fig. 1d is a schematic plan view of a heat-generating component provided in another embodiment of the present application; the cutting groove 328 may be a centrosymmetric structure gradually increasing from one end far away from the third extension 323 to one end near the third extension 323, the outer sides of the corresponding first extension 321 and second extension 322 are parallel, and the widths of the first extension 321 and second extension 322 gradually decrease from one end far away from the third extension 323 to one end near the third extension 323, so that the resistance near the upper end of the heating element 32 is relatively large, and the design requirement of the heating manner that the high temperature of the heating element 32 is relatively concentrated at the upper section of the heating element 32 is satisfied.

In other embodiments, referring to fig. 1e, fig. 1e is a schematic plan view of a heat-generating component provided in accordance with yet another embodiment of the present application; the first and second extending

portions

321, 322 are rectangular, but are not parallel, but are disposed at an angle, for example, 3-10 degrees, in this case, the width of the slot 328 may be a central symmetry structure that gradually decreases from the end far from the third extending portion 323 to the end near the third extending portion 323.

Referring to fig. 2, the accommodating groove 311 has an open end and a closed end, and the accommodating groove 311 specifically extends from the first end M of the substrate 31 to a position close to the second end N; in one embodiment, the end of the receiving groove 311 away from the second end N of the substrate 31 is an open end, and the end of the receiving groove 311 close to the second end N of the substrate 31 is a closed end, so that the problem of stress release when the heating element 32 and the substrate 31 are co-sintered can be prevented by setting the end of the receiving groove 311 as the open end, for example, when the opening is not provided, the substrate 31 may be pressed by a slight stress of the heating element 32, and when the first end M is an open end, the conductive ceramic connection of the electrode lead (not shown) is facilitated. In this embodiment, the accommodating groove 311 is a U-shaped structure; in this embodiment, the third extension 323 of the heating element 32 is disposed at the position of the containing groove 311 near the closed end, and the base plate 31 has a tip near the closed end for conveniently inserting the aerosol-forming substrate.

In another embodiment, referring to fig. 4, fig. 4 is a schematic diagram of a position between the substrate and the heating element provided in an embodiment of the present application, an end of the through slot away from the second end portion N of the substrate 31 may also be a closed end, and an end of the through slot close to the second end portion N of the substrate 31 is an open end; in this embodiment, the third extension 323 of the heating element 32 may extend out from the open end of the through slot and form a tip, and the specific structure can be seen in fig. 4; of course, in other embodiments, both ends of the through slot may be closed ends, that is, the accommodating slot 311 is a through hole.

Specifically, referring to fig. 1a and 2, the heating element 32 may be a plate structure, which may be a heating plate made of conductive ceramic, and the resistivity of the ceramic used in the heating plate may be 5 × 10-⁵Ohm, the design power can be 2 watts, and the resistance can be 0.71 ohm; specifically, the heating plate may be a single series type, that is, the first extension portion 321, the third extension portion 323, and the second extension portion 322 are sequentially connected in series (the middle slot).

In one embodiment, see fig. 5 and 6, wherein fig. 5 is a disassembled schematic view of a heat generating component according to an embodiment of the present application; FIG. 6 is a disassembled schematic view of a heat generating component according to another embodiment of the present application; an adhesive layer 34 is further provided at the adjacent position of the substrate 31 and the heating element 32 to enhance the adhesive force between the heating element 32 and the substrate 31; specifically, the adhesive layer 34 may be made of a matching inorganic glass ceramic, and is bonded 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 mm; of course, in other embodiments, a seamless splicing type may be directly used between the substrate 31 and the heating element 32.

In the specific implementation process, the periphery of the sintered heating element 32 is coated with the bonding glass ceramics, then the heating element 32 is placed in the accommodating groove 311 of the sintered substrate 31, and then the substrate 31 and the heating element 32 are sintered for the second time together, so that the heating element 32 is embedded in the accommodating groove 311 of the substrate 31.

Referring to fig. 1 a-5, in a particular embodiment, the heating element 30 further includes a first electrode 33a and a second electrode 33 b; one of the first electrode 33a and the second electrode 33b is provided on the first extension 321, and the other electrode is provided on the second extension 322, and during use, the first electrode 33a and the second electrode 33b are electrically connected to the power module through electrode leads, respectively, so that the heating element 32 is electrically connected to the power module. Specifically, referring to fig. 3a, the first electrode 33a and the second electrode 33b are respectively disposed on the same side surface of one end of the first extension portion 321 and the second extension portion 322 away from the third extension portion 323. In an embodiment, when the substrate 31 is a metal substrate, the first electrode 33a and the second electrode 33b may also extend to the surface of the metal substrate 31, so that when the power is supplied, the metal substrate 31 can generate heat, thereby improving the heating efficiency.

In a particular embodiment, referring to fig. 2, 5 and 6, the first surface C of one of the first extension 321 and the second extension 322 is₂And with the first surface C₂Oppositely arranged second surface D₂A first electrode 33a, a first surface C of the other extension portion₂And the first surface C₂Oppositely arranged second surface D₂The second electrodes 33b are provided, that is, the number of the first electrodes 33a and the second electrodes 33b is two. When the first electrode 33a and the second electrode 33b are connected to two electrode leads, one Y-shaped electrode lead may be connected to the first electrode 33a on both surfaces of the first extension 321, and the other Y-shaped electrode lead may be connected to the second electrode 33b on the second extension 322; the first electrode 33a and the second electrode 33b are arranged on the two surfaces, so that welding is facilitated, the contact area with the conductive ceramic heating body 32 can be increased as much as possible to reduce contact resistance, smaller heat is generated when the heating body 32 is electrified, the temperature is reduced, the two surfaces of the conductive ceramic heating body 32 are electrified simultaneously, the same potential is formed on the two surfaces, the electric field of conductive components between the two surfaces is uniform, and the heating effect is better; therefore, the mount 40 can be provided at the positions of the first electrode 33a and the second electrode 33b (heat generation is low because the resistance of the heating element 32 at the first electrode 33a and the second electrode 33b is small), and the mount 40 can be prevented from being damaged by high temperature.

Specifically, the first electrode 33a and the second electrode 33b may be formed at both end portions of the first extension portion 321 and the second extension portion 322 in a coating manner to improve the coupling force between the electrodes and the heating body 32, thereby improving the connection stability between the electrode lead connected to the electrodes and the heating body 32; it will be appreciated that the ceramic has a microporous structure which enables a greater thickness to be appliedIn this case, the bonding force between the first electrode 33a and the second electrode 33b and the heating element 32 is strong, and the bonding force between the first electrode 33a and the heating element 32 and the bonding force between the second electrode 33b and the heating element 32 are greatly improved. Specifically, the coating material may be silver paste. It is understood that the first electrode 33a and the second electrode 33b may be formed by depositing metal films, such as gold, platinum, copper, etc., with a thickness higher than 1 x 10-⁶An ohmic metallic material; the length of the coating may be in particular 6.5 mm.

In a specific embodiment, referring to fig. 7, fig. 7 is a side view of a heat-generating body provided in an embodiment of the present application; the surface of the heating element 32 may be further coated with a protective layer 35, and the protective layer 35 covers the first electrode 33a and the second electrode 33b to prevent the first electrode 33a, the second electrode 33b and the heating element 32 from being damaged by tobacco tar formed when the tobacco is heated; specifically, the protective layer 35 may be a glass glaze layer. Further, the protective layer 35 may also cover the entire substrate 31, thereby giving the entire heat generating component 30 a smooth surface; of course, in other embodiments, the protective layer 35 may also be coated on the entire surface of the substrate 31 and the part of the surface of the heating element 32 close to the substrate 31, so as to expose the part of 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, and simultaneously enabling the heating element 32 to directly contact with the aerosol-forming substrate, thereby improving the heat utilization rate; the surface of the heating element 32 near the substrate 31 is specifically the surface of the heating element 32 near the connection between the heating element 32 and the substrate 31; the surface of the heat-generating body 32 away from the substrate 31 is specifically the middle portion of the heat-generating body 32.

Specifically, referring to 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 a main atomization area into which the aerosol-forming substrate is inserted to heat, so that the substrate 31 and the heating element 32 are at least partially inserted onto the aerosol-forming substrate, the atomization temperature thereon is concentrated at 280 ℃ to 350 ℃ and occupies more than 75% of the area of the atomization area, and the second heating area B is a main matching section of the heating element 32, and the temperature is below 150 ℃; in an embodiment, the first electrode 33a and the second electrode 33B are disposed in the second heat generating region B of the heating element 32 to reduce the atomization temperature of the ceramic heating element 32, so that the ratio of the heat generating temperature of the first heat generating region a to the heat generating temperature of the second heat generating region B of the heating element 32 is greater than 2.

In a specific embodiment, the resistivity of the material of the part of the heating element 32 located in the second heat generation area B is smaller than the resistivity of the material of the part of the heating element 32 located in the first heat generation area a, so that the temperature of the first heat generation area a of the heating element 32 is higher than the temperature of the second heat generation area B; meanwhile, materials with different resistivities are arranged in different heating areas, so that the temperatures of the different heating areas are regulated and controlled through resistivity differences; specifically, the ceramic material main body components of the part of the heating element 32 located in the first heating area a and the part of the heating element 32 located in the second heating area B are substantially the same and are integrally molded, but the proportion of the ceramic material of the part of the heating element 32 located in the first heating area a and the proportion of the ceramic material of the part of the heating element 32 located in the second heating area B are different or other components are different, so that the resistivity of the part of the heating element 32 located in the first heating area a is different from that of the part of the heating element 32 located in the second heating area B. Compared with the prior art, the scheme that the first heating area A and the second heating area B are made of different conductive materials, such as an aluminum film and a gold film, and the two different conductive materials are spliced can effectively avoid the problem that the conductors of the first heating area A and the second heating area B of the heating body 32 are broken.

In the heating unit 30 of the present embodiment, the substrate 31 and the heating element 32 are provided to heat the tobacco in the aerosol-forming substrate by the heating element 32 after the aerosol-forming substrate is inserted; meanwhile, by providing the heat-generating body 32 to include the first extension portion 321 and the second extension portion 322 connected to the first extension portion 321, and the base plate 31 and the first extension portion 321 and the second extension portion 322 of the heat-generating body 32 are used to be at least partially inserted into the aerosol-forming substrate and generate heat when energized to heat the aerosol-forming substrate; compared with the heating element printed on the ceramic substrate by silk screen printing, the substrate 31 and the heating element 32 can be directly and independently inserted into the aerosol to form the substrate, the problem that the heating element 32 falls off from the ceramic substrate to cause failure when heated at high temperature can be avoided, and the stability of the heating component 30 is greatly improved; in addition, through setting up base plate 31, inlay the heat-generating body 32 in base plate 31 to improve the intensity of heat-generating component 30, make heat-generating component 30 in the in-process of inserting aerosol formation matrix, can pass through base plate 31 atress, effectively avoided heat-generating body 32 because of the problem that the atress leads to buckling.

In an embodiment, see fig. 2 and 3a, wherein the through groove is close to the second surface D of the substrate 31₁Is provided with a first flange 312 having a thickness smaller than that of the heating element 32 in the thickness direction of the heating element 32, and the heating element 32 is specifically overlapped on a second surface D of the first flange 312 away from the substrate 31₁To prevent the substrate from falling off from the through groove of the substrate 31; specifically, a surface of the first flange 312 and the second surface D of the substrate 31₁The stepped substrate 31 with the first flange 312 is formed by cutting the substrate 31 according to a preset size through laser in the embodiment, so that the dimensional accuracy of the product can be effectively ensured, and the supporting strength of the first flange 312 can be greatly improved.

In a specific embodiment, referring to fig. 2, the first flange 312 extends continuously to the inner wall surface of the entire through groove along the circumferential direction of the through groove, and it should be noted that the first flange 312 is smaller than the thickness of the heating element 32 in the thickness direction of the heating element 32, which can be specifically understood that the first flange 312 is disposed around the circumferential direction of the through groove so that the first flange 312 and the through groove have the same shape, and when the through groove is a U-shaped groove, the first flange 312 has a continuous U-shaped structure.

In an embodiment, referring to fig. 1a and fig. 2, the length of the substrate 31 is slightly greater than the length of the heating element 32, the first heating area a and the second heating area B of the heating element 32 can be completely accommodated in the accommodating groove 311, the inner wall surface of the through groove is provided with a first flange 312 at a position corresponding to the first heating area a and the second heating area B of the heating element 32, and the first heating area a and the second heating area B of the heating element 32 are overlapped on the first flange 312. Correspondingly, during the heating of the heating element 32, the temperature of the portion of the substrate 31 surrounding the first heating area a will be higher than the temperature of the portion of the substrate 31 surrounding the first heating area a. In the configuration shown in fig. 2, the first heat generation region a and the portion of the substrate 31 surrounding the first heat generation region a are inserted into the aerosol-forming substrate, and the second heat generation region B and the portion of the substrate 31 surrounding the second heat generation region B are positioned outside the aerosol-forming substrate.

Specifically, the size of the product (see fig. 2) corresponding to the above embodiment can be specifically seen in fig. 8 and fig. 9, where fig. 8 is a schematic size diagram of a heat generating component provided in an embodiment of the present application, and fig. 9 is a C-direction view of the structure shown in fig. 8; specifically, the total length L21 of the substrate 31 may be 15-20 mm, such as 18.00 mm, the total width W21 may be 3-6 mm, such as 5.00 mm, and the total thickness H21 may be 0.3-0.6 mm, such as 0.5 mm; wherein the first surface C of the substrate 31₁May be 0.5-1 mm, such as 0.75 mm, and the second surface D of the substrate 31₁May be 1-2 mm, such as may be 1.25 mm, and in this embodiment, the width of the first flange 312 may be 0.2-0.3 mm, such as may be 0.25 mm; specifically, the length L22 of the heat generating body 32 installed in the accommodating groove 311 may be 10-17 mm, for example, 16.1 mm, the width W24 may be 2-5 mm, for example, 3.4 mm, the length L23 of the first extending portion 321 and the second extending portion 322 may be 12-16 mm, for example, 14.55 mm, the distance L24 between the first extending portion 321 and the second extending portion 322 is less than one tenth of the width of the entire heat generating body 32, the distance L24 between the first extending portion 321 and the second extending portion 322 may be 0.25-0.35 mm, for example, the distance L24 between the first extending portion 321 and the second extending portion may be 0.3 mm, so as to effectively ensure the strength of the heat generating body 32 and avoid the short circuit problem. Specifically, after the heating element 32 is accommodated in the accommodating groove 311, a gap is left between the heating element and the inner wall surface of the accommodating groove 311 to facilitate filling the bonding layer 34, and the width of the gap may be specifically 0.05-0.1 mm.

In another embodiment, referring to fig. 10a, fig. 10a is a schematic structural diagram of a heat generating component according to another embodiment of the present application; the first heating area a and the second heating area B may also be only the first heating area a of the heating element 32 accommodated in the accommodating groove 311, and the second heating area B is suspended, at this time, refer to fig. 10B, where fig. 10B is a schematic view of the heating element provided in another embodiment of the present application inserted into the aerosol atomization substrate; the substrate 31 may be fully inserted into the aerosol-forming substrate 302 with the heating element 32 still partially inserted into the aerosol-forming substrate 302; specifically, only most or all of the first heat generating region a of the heat generating body 32 is inserted into the aerosol-forming substrate 302, and the portion corresponding to the second heat generating region B remains outside the aerosol-forming substrate 302, i.e., the aerosol-forming substrate 302 is not inserted; or the first heat-generating region a and a small part of the second heat-generating region B of the heat-generating body 32 are both inserted into the aerosol-forming substrate 302, and the part corresponding to the large part of the second heat-generating region B stays outside the aerosol-forming substrate 302; in this embodiment, referring to fig. 5 and 11, fig. 11 is a schematic structural diagram of a heat generating component according to another embodiment of the present application; the first extension part 321 and the second extension part 322 are provided with a first protrusion 3211 and a second protrusion 3221, which are disposed opposite to each other, at a portion of the heating element 32 located in the second heat generation region B, so that the width of the portion of the heating element 32 located in the second heat generation region B is greater than the width of the portion located in the first heat generation region a, thereby ensuring the strength of the second heat generation region B of the heating element 32, and making the resistance of the second heat generation region B of the heating element 32 smaller than that of the first heat generation region a, so that the temperature corresponding to the second heat generation region B of the heating element 32 is lower. Specifically, in this embodiment, the length L21 of the base plate 31 is smaller than the length L22 of the heat-generating body 32.

Specifically, the first convex portion 3211 and the second convex portion 3221 are respectively abutted against the end portions of the substrate 31; in an embodiment, the width W25 of the first protrusion 3211 and the second protrusion 3221 may be the same as the width W26 of two opposite sidewalls of the receiving groove 311, where the two opposite sidewalls of the receiving groove 311 refer to two extending portions of the substrate 31 that are spaced apart from each other and arranged in parallel; in one embodiment, referring to fig. 5, the end portions of the first extension portion 321 and the second extension portion 322 far from the third extension portion 323 are provided with a second flange 313 flush with the first flange 312, the positions of the first protrusion portion 3211 and the second protrusion portion 3221 corresponding to the second flange 313 are provided with a first position avoidance portion 324 corresponding to the second flange 313, and the first position avoidance portion 324 overlaps the second flange 313 to support the second heat generation region B of the heat generation body 32 through the second flange 313.

In another embodiment, referring to fig. 3a, the heating element 32 is entirely accommodated in the accommodating groove 311, and the first flange 312 is only disposed at a position where the inner wall surface of the accommodating groove 311 is close to the first end M; specifically, the first flanges 312 include two, and the two first flanges 312 are oppositely disposed on two inner wall surfaces of the receiving groove 311 and are located at a position of the substrate 31 close to the first end M.

Specifically, when the heating element 32 is entirely accommodated in the accommodating groove 311, the inner wall surface of the accommodating groove 311 is provided with two first flanges 312 only at positions corresponding to the second heating area B of the heating element 32, and a part of the second heating area B of the heating element 32 is overlapped on the two first flanges 312; referring now to fig. 3b, fig. 3b is a schematic illustration of a heat generating component according to an embodiment of the present application inserted into an aerosol atomizing substrate; the substrate 31 is partially inserted into the aerosol-forming substrate 302, the heating element 32 still being partially inserted into the aerosol-forming substrate 302; specifically, only the portion corresponding to the first heat generation region a of the heat generating body 32 is inserted into the aerosol-forming substrate 302, and the first heat generation region a of the heat generating body 32 is not supported by the substrate 31, and the portion corresponding to the second heat generation region B of the heat generating body 32 and the portion of the substrate 31 at the corresponding position stay outside the aerosol-forming substrate 302, that is, the aerosol-forming substrate 302 is not inserted; in the specific embodiment, referring to fig. 6, the thickness of the heating element 32 is the same as that of the substrate 31, two second positioning portions 325 corresponding to the two first flanges 312 are provided at the portion of the heating element 32 located in the second heating area B, and the two second positioning portions 325 overlap 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 heat-generating body 32 is accommodated in the accommodating groove 311, the inner wall surface of the accommodating groove 311 is provided with two first flanges 312 only at the position corresponding to part of the first heat-generating region a of the heat-generating body 32, and the part of the heat-generating body 32 located at the first heat-generating region a is overlapped on the two first flanges 312.

In a specific embodiment, the structural dimensions of the heating element 32 corresponding to fig. 3a can be specifically referred to fig. 12, and fig. 12 is a schematic dimensional view of a heating assembly provided in another embodiment of the present application; in this embodiment, the total length L21 of the substrate 31 may still be 15-20 mm, for exampleMay be 18.00 mm, the total width W21 may be 3-6 mm, such as may be 5.00 mm, and the total thickness H21 may be 0.3-0.6 mm, such as may be 0.5 mm; wherein the first surface C of the substrate 31₁May be 0.5-1 mm, such as 0.75 mm, and the second surface D of the substrate 31₁May be 1-2 mm, such as 1.25 mm, in this embodiment, the thickness H22 of the first flange 312 may be 0.2-0.3 mm, such as 0.25 mm, and the length L25 of the first flange 312 may be 5-6 mm, such as 6.00 mm; the length L22 of the heating element 32 installed in the containing groove 311 may be 10 to 17 mm, for example, 16.1 mm, the width W24 of the portion overlapping the first flange 312 may be 2 to 5 mm, for example, 3.4 mm, and the width W27 of the portion caught between the first flanges 312 may be 2 to 3 mm, for example, 2.4 mm; the length L23 of the first extension part 321 and the second extension part 322 may be 13-16 mm, for example, 14.55 mm, the distance L4 between the first extension part 321 and the second extension part 322 is less than one tenth of the width of the entire heat-generating body 32, the distance L24 between the first extension part 321 and the second extension part 322 may range from 0.25 to 0.35 mm, for example, the distance L24 may specifically be 0.3 mm; specifically, the length of the first positioning portion 324 of the heating element 32 is equal to the length of the first flange 312, and the height of the first positioning portion 324 is equal to the thickness H22 of the first flange 312. Specifically, the error range of the above dimensions is not more than 0.05 mm.

In a specific embodiment, refer to fig. 13 to 16, wherein fig. 13 is a schematic structural view of a mounting base and a heat generating component provided in an embodiment of the present application after being assembled; FIG. 14 is a disassembled view of the product corresponding to FIG. 13; fig. 15 is a schematic structural diagram of a mounting base and a heat generating component according to another embodiment of the present application after being assembled; FIG. 16 is a disassembled view of the product corresponding to FIG. 15; the heating element 30 is further provided with an installation seat 40, in a specific embodiment, the heating element 30 is arranged on the installation seat 40 when in use so as to form a heating mechanism, and the installation seat 40 is fixedly clamped with the heating element 30 so as to install the heating element 30 in the main body of the aerosol forming device through the installation seat 40; specifically, the mounting seat 40 is fixed at a position corresponding to the second heating area B on the heating assembly 30; and the bottom end of the aerosol-forming substrate 302 abuts the upper surface of the mount 40 after insertion of the aerosol-forming substrate 302.

Specifically, the material of the mounting seat 40 may be an organic or inorganic material having a melting point higher than 160 degrees, for example, PEEK material; the mounting base 40 may be bonded to the heat generating component 30 by an adhesive, which may be a high temperature resistant glue.

In an embodiment, referring to fig. 13 and 14, the mounting seat 40 includes a mounting main body 41, the mounting main body 41 is provided with a mounting hole 42, and the heat generating component 30 is specifically plugged into the mounting hole 42 to be mounted with the mounting seat 40; in the specific embodiment, when the heating element 32 of the heating assembly 30 is fixed to the mounting seat 40, the portion of the heating element 32 corresponding to the second heating area B is inserted into the mounting hole 42; specifically, an avoiding groove is formed in the side wall of the mounting hole 42, and the electrode lead specifically extends into the mounting base 40 through the avoiding groove to be connected with the electrode on the heating element 32. Further, still be provided with two at least joint portions 43 on the installation main part 41, the mount pad 40 specifically passes through joint portion 43 and is fixed with the casing of aerosol forming device.

Further, referring to fig. 16, one side of the mounting body 41 may be further provided with an extension groove 44 communicating with the mounting hole 42, the extension groove 44 may be specifically provided on a surface of one side facing away from the third extension 323 of the heating element 32, and the extension groove 44 may conform to the shape of the portion of the heating element 30 for insertion into the mounting seat 40, for example, if the portion of the heating element 30 for insertion into the mounting seat 40 is rectangular, the extension groove 44 may also be rectangular, so that the portion of the heating element 30 inserted into the mounting seat 40 may be reinforced by the extension groove 44 to prevent breakage thereof. In one embodiment, two extension slots 44 are provided on the mounting base 40, and the two extension slots 44 are arranged perpendicularly and crosswise.

In a specific embodiment, referring to fig. 17, fig. 17 is a front view of a mounting base and a heat generating component provided in an embodiment of the present application after assembly; the heating component 30 has a first fixing structure 326 on a portion of the surface for inserting into the mounting base 40, a second fixing structure 327 on a position corresponding to the first fixing structure 326 in the mounting hole 42 of the mounting base 40, and the mounting base 40 and the heating component are fixed by the first fixing structure 326 and the second fixing structure 327, so as to improve the connection stability of the two. The first fastening structure 326 may be a plurality of protrusions (or recesses), and the second fastening structure 327 may be a recess (or protrusion) matching with the first fastening structure 326. Specifically, when the heating element 32 of the heating element assembly 30 is fixed to the mounting seat 40, the first fastening structure 326 may be disposed on a part of the surface of the first extending portion 321 and the second extending portion 322 of the heating element 32 for inserting into the mounting seat 40; when the substrate 31 of the heat generating component 30 is fixed to the mounting seat 40, the first fastening structure 326 may be specifically disposed on a portion of the surface of the substrate 31 for inserting into the mounting seat 40 (see fig. 17).

In the heating assembly 30 provided in this embodiment, the heating form can directly adopt a self-supporting ceramic heating plate (or heating rod), and the heating elements 32 can be arranged in a single series connection form according to the electrode arrangement position and the resistance value requirement; meanwhile, the heating body 32 is made of ceramic materials, and compared with the heating body structure formed by coating metal heating materials on the existing metal heating body or ceramic substrate, the heating body structure can contact tobacco on two sides and heat the tobacco simultaneously, and heating is more uniform and stable.

Referring to fig. 18, fig. 18 is a schematic structural diagram of an aerosol-forming device according to an embodiment of the present disclosure; in this embodiment, an aerosol-forming device 300 is provided, the aerosol-forming device 300 comprising a housing 301 and a heat generating component 30, a mount 40 and a power supply component 50 arranged within the housing 301.

The heating component 30 is arranged on the mounting seat 40 and is fixedly mounted on the inner wall surface of the shell 301 through the mounting seat 40; specifically, the specific structures and functions of the heating element 30 and the mounting seat 40 can be referred to the description of the relevant embodiments in the heating element 30 provided in the above embodiments, and are not described herein again; the power supply assembly 50 is connected to the heating assembly 30 and is used for supplying power to the heating assembly 30; and in one embodiment the power supply assembly 50 may be embodied as a rechargeable lithium ion battery.

The present embodiment provides an aerosol-forming device 300 in which a heat generating component 30 is arranged to heat and atomise an aerosol-forming substrate 302 after insertion of the aerosol-forming substrate 302; wherein the heating element 30 is arranged to comprise a substrate 31 and a heating element 32 to heat tobacco within the aerosol-forming substrate 302 by the heating element 32 after insertion of the aerosol-forming substrate 302; meanwhile, by providing the heat-generating body 32 to include the first extension 321 and the second extension 322 connected to the first extension 321, and the base plate 31 and the first extension 321 and the second extension 322 of the heat-generating body 32 for at least partially inserting the aerosol-forming substrate 302 and generating heat when energized to heat the aerosol-forming substrate 302; compared with the heating element printed on the ceramic substrate by silk screen printing, the substrate 31 and the heating element 32 can be directly and independently inserted into the aerosol formation substrate 302, the problem of failure caused by the fact that the heating element 32 falls off from the ceramic substrate when heated at high temperature can be avoided, and the stability of the heating component 30 is greatly improved; in addition, through setting up base plate 31, inlay the heat-generating body 32 in base plate 31 to improve the intensity of heat-generating component 30, make heat-generating component 30 in the in-process of inserting aerosol formation matrix 302, can pass through base plate 31 atress, effectively avoided heat-generating body 32 because of the problem that the atress leads to buckling.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. A heat generating component, comprising:

a substrate;

the heating element is embedded in the base plate, the heating element comprises a first extending part and a second extending part, the first extending part and the second extending part are arranged at intervals, the second extending part is connected with one end of the first extending part, the base plate and the heating element are used for being at least partially inserted into aerosol forming substrates, and the first extending part and the second extending part generate heat to heat the aerosol forming substrates when being electrified.

2. The heating element as claimed in claim 1, wherein the base plate defines a receiving cavity, at least a portion of the heating element is received in the receiving cavity, the first and second extending portions are spaced apart from each other, the heating element further includes a third extending portion for completely inserting and heating the aerosol-forming substrate, and the first and second extending portions are connected at their ends adjacent to each other by the third extending portion.

3. The heat generating component as claimed in claim 2, wherein the substrate has a first surface and a second surface opposite to the first surface, and the receiving groove is a through groove penetrating through the first surface and the second surface, so that the heat generating body is exposed from one side of the first surface and one side of the second surface, respectively.

4. The heat generating component of claim 3 wherein said through slot has an open end and a closed end opposite said open end; the third extending part is arranged at the position of the open end and extends out of the open end to form a tip.

5. The heat generating assembly as claimed in claim 3, wherein the through slot has an open end and a closed end opposite to the open end, the third extending portion is disposed near the closed end, and the base plate has a tip near the closed end.

6. The heat generating component as claimed in claim 5, wherein a first flange is provided on an inner wall surface of the through groove close to the second surface, and the heat generating body is overlapped on the first flange.

7. The heating assembly as claimed in claim 6, wherein the first flange extends along a circumferential direction of the through groove, the heating body includes a first heating region and a second heating region connected to the first heating region, and only the first heating region of the first heating region and the second heating region is accommodated in the accommodating groove and overlaps the first flange.

8. The heat generating component of claim 7, wherein the first and second extending portions are provided with first and second bosses opposite to each other, and the first and second bosses are respectively abutted against ends of the substrate.

9. The heating element according to claim 8, wherein a second flange is provided at an end of the substrate abutting against the first protrusion and the second protrusion, and a first relief portion is provided at a position of the first protrusion and the second protrusion corresponding to the second flange, and the first relief portion overlaps the second flange.

10. The heating assembly as claimed in claim 6, wherein the heating element includes a first heating region and a second heating region connected to the first heating region, the heating element is entirely accommodated in the accommodating groove, two first flanges are provided on an inner wall surface of the accommodating groove only at positions corresponding to the second heating region, and a portion of the heating element located in the second heating region overlaps the two first flanges.

11. The heat generating component according to claim 10, wherein a portion of the heat generating body located in the second heat generating region is provided with two second yield portions corresponding to the two first flanges, and the two second yield portions overlap the two first flanges.

12. The heat generating assembly of claim 10, wherein a ratio of the heat generating temperature of the first heat generating region to the heat generating temperature of the second heat generating region is greater than 2.

13. The heat generating assembly of claim 1 further comprising a first electrode and a second electrode, one of the first electrode and the second electrode disposed at an end of the first extension distal from the third extension and the other electrode disposed at an end of the second extension distal from the third extension.

14. The heat generating assembly of claim 13 wherein a first surface of the first extension and a second surface opposite the first surface are each provided with the electrode, and a first surface of the second extension and a second surface opposite the first surface are each provided with the electrode.

15. The heat generating component of claim 13, further comprising a protective layer coated on the surface of the heat generating body and covering the first electrode and the second electrode; or the heating element is coated on the surface of the whole substrate and the partial surface of the heating element close to the substrate, so that the partial surface of the heating element far away from the substrate is exposed.

16. The heat generating component as claimed in claim 1, wherein the heat generating body is a heat generating plate, and a distance between the first extending portion and the second extending portion of the heat generating body is 0.25 to 0.35 mm.

17. The heat generating component according to claim 1, wherein the heat generating body includes a main component and a crystal component; the main component is one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon and titanium, and the crystal component is one or more of lanthanum manganate, lanthanum strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide and yttrium oxide.

18. The heating element as claimed in claim 1, wherein the substrate is made of insulating ceramic, and an adhesive layer is provided between the substrate and the heating element for bonding the substrate and the heating element.

19. The heating element as claimed in claim 3, wherein the heating element and the substrate are flat, and the upper and lower surfaces of the heating element are flush with, protrude from, or recess in the first and second surfaces of the substrate.

20. An aerosol-forming device, comprising: the heating module and the power supply module are arranged in the shell; wherein the power supply component is connected to the heat generating component for supplying power to the heat generating component, and the heat generating component is the heat generating component according to any one of claims 1 to 19.