Heating component and aerosol generating device

Abstract

The present application provides a heating component and an aerosol forming device. The heating component includes a substrate, a heating element, a first electrode and a second electrode; wherein, the substrate is used for being at least partially inserted into an aerosol forming matrix, and the substrate has a first end portion and a second end portion; at least one heating element is embedded in the substrate, and the heating element has a first connection end and a second connection end opposite to the first connection end; at least one of the first electrode and the second electrode extends from the first end portion to the second end portion, and one of the first electrode and the second electrode is electrically connected to the first connection end, and the other electrode is electrically connected to the second connection end; wherein, at least one heating element is used for being inserted into the aerosol forming matrix and generating heat by being powered by the first electrode and the second electrode. The heating component can avoid the problem of failure caused by the heating element falling off the substrate during high-temperature heating, and greatly improves the reliability of the heating component.

Description

Technical Field

[0001] The present invention relates to the technical field of heat-not-burn smoking devices, and particularly to a heating component and an aerosol forming device. Background Art

[0002] As a substitute for cigarettes, electronic cigarettes have attracted more and more attention and favor due to their advantages of safety, convenience, health, environmental protection, etc.; for example, heat-not-burn electronic cigarettes, also known as heat-not-burn aerosol forming devices.

[0003] In existing heat-not-burn aerosol forming devices, the heating method is usually tube peripheral heating or central embedded heating; tube peripheral heating means that a heating tube surrounds an aerosol forming matrix (such as tobacco) to heat the aerosol forming matrix, and central embedded heating is to insert a heating component into the aerosol forming matrix to heat the aerosol forming matrix. Among them, the heating component is widely used due to its simple manufacturing and convenient use. Currently, the main heating components use ceramics or insulated metals as the substrate, and then print or coat a resistive heating circuit on the substrate, and after high-temperature treatment, the resistive heating circuit is fixed on the substrate to form.

[0004] However, since the resistive heating circuit on the existing heating component is a thin film printed or coated on the substrate later, during the process of repeatedly inserting the heating component into the aerosol forming matrix, due to the bending deformation of the substrate, when the resistive heating circuit is heated at high temperature, it is easy to fall off from the substrate, with poor stability. And during the heating process, since the resistive heating circuit only contacts the aerosol forming matrix on one side of the substrate where the resistive heating circuit is provided and does not contact the aerosol forming matrix on the back of the substrate, the heating uniformity of the aerosol forming matrix is poor. Summary of the Invention

[0005] The present application provides a heating component and an aerosol forming device, which can solve the problems that the resistive heating circuit on the existing heating component is easy to fall off from the substrate during high-temperature heating, with poor stability, and during the heating process, the resistive heating circuit has poor heating uniformity for the aerosol forming matrix.

[0006] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a heating component, which includes a substrate, at least one heating element, a first electrode and a second electrode; wherein the substrate is used to be at least partially inserted into the aerosol-forming matrix, and the substrate has a first end and a second end; at least one heating element is embedded in the substrate, and the heating element has a first connection end and a second connection end opposite to the first connection end; at least one electrode of the first electrode and the second electrode extends from the first end to the second end, and one of the first electrode and the second electrode is electrically connected to the first connection end, and the other electrode is electrically connected to the second connection end; wherein, at least one heating element is used to be inserted into the aerosol-forming matrix and generates heat by supplying power through the first electrode and the second electrode.

[0007] In order to solve the above technical problems, another technical solution adopted in this application is: to provide an aerosol forming device, which includes a shell and a heating component and a power supply component arranged in the shell; wherein the power supply component is connected to the heating component for supplying power to the heating component, and the heating component is the heating component involved above.

[0008] The heating component and aerosol forming device provided by the present application heat the aerosol-forming matrix by providing a substrate and a heating element; at the same time, the heating element is embedded in the substrate, which can effectively improve the strength of the heating component, so that the heating component can be subjected to force through the substrate during the insertion of the aerosol-forming matrix, effectively avoiding the problem of bending of the heating element due to force; and compared with the existing resistive heating circuit formed by silk screen printing or coating on the substrate, the substrate and heating element of the present application can be directly and independently inserted into the aerosol-forming matrix, and there will be no problem of failure caused by the heating element falling off the substrate during high-temperature heating, which greatly improves the stability of the heating component; in addition, by providing a first electrode and a second electrode, and extending at least one of the first electrode and the second electrode from the first end to the second end of the substrate, so that one of the first electrode and the second electrode is electrically connected to the first connection end of the heating element, and the other electrode is electrically connected to the second connection end of the heating element, so that the heating element forms a current loop, which not only avoids the short circuit problem, but also has a simpler process and a higher strength of the heating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1a A schematic structural diagram of a heating component provided in the first embodiment of the present application;

[0010] Figure 1b A schematic diagram of a heating element provided in an embodiment of the present application being inserted into an aerosol-forming substrate;

[0011] Figure 2 Provided for an embodiment of this application Figure 1aSchematic diagram of product dimensions of the heating component shown;

[0012] Figure 3 Another embodiment of the present application provides Figure 1a Schematic diagram of product dimensions of the heating component shown;

[0013] Figure 4a A side view of the heating component provided in the first specific embodiment of the present application;

[0014] Figure 4b A side view of a heating component provided in a second specific embodiment of the present application;

[0015] Figure 4c A side view of a heating component provided in a third embodiment of the present application;

[0016] Figure 5 A side view of a heating component provided in a fourth embodiment of the present application;

[0017] Figure 6 A side view of a heating component provided in one embodiment of the present application;

[0018] Figure 7 A schematic structural diagram of a heating component provided in the second embodiment of the present application;

[0019] Figure 8a A schematic structural diagram of a heating component provided in the third embodiment of the present application;

[0020] Figure 8b A side view of a heating component provided in a fifth embodiment of the present application;

[0021] Figure 9 A side view of a heating component provided in a sixth embodiment of the present application;

[0022] Figure 10 A schematic structural diagram of a heating component provided in a fourth embodiment of the present application;

[0023] Figure 11 A side view of a heating component provided in a seventh embodiment of the present application;

[0024] Figure 12 A schematic structural diagram of an aerosol forming device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0026] The terms "first", "second", and "third" in the present application are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0027] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0028] The present application will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Please refer to Figures 1a to 3 , wherein, Figure 1a is a schematic structural diagram of a heating component provided by the first embodiment of the present application; Figure 1b is a schematic diagram of inserting the heating component into an aerosol-forming substrate provided by an embodiment of the present application; Figure 2 is provided by an embodiment of the present application Figure 1a schematic diagram of the product size of the heating component shown; Figure 3 is provided by another embodiment of the present application Figure 1aSchematic diagram of the product size of the heating component shown; in this embodiment, a heating component 60 is provided, which is specifically used to insert into and heat the aerosol-forming substrate 67. For example, in a specific embodiment, the heating component 60 can be specifically used to insert into tobacco to heat the tobacco. The following embodiments are all taken as examples; it can be understood that in this embodiment, the aerosol-forming substrate 67 can be specifically tobacco; among them, the schematic diagram of the heating component 60 inserted into the aerosol-forming substrate 67 can be seen in Figure 1b .

[0030] Specifically, refer to Figure 1a , the heating component 60 includes a substrate 61, at least one heating element 62, and a first electrode 63a and a second electrode 63b. Among them, the substrate 61 is used to be at least partially inserted into the aerosol-forming substrate 67, and has a first end M and a second end N opposite to the first end M; at least one heating element 62 is used to heat the tobacco after being inserted into the tobacco, and the heating element 62 is specifically embedded in the substrate 61 to effectively improve the strength of the heating component 60 by using the substrate 61, so that during the process of inserting the heating component 60 into the tobacco, the heating component 60 can be stressed through the substrate 61, effectively avoiding the problem that the heating element 62 is bent or broken due to stress; at the same time, compared with the existing resistance heating circuits formed by screen printing or coating on the substrate, the substrate 61 and the heating element 62 of the present application can be directly and independently inserted into the aerosol-forming substrate 67, and there will be no problem that the heating element 62 falls off from the substrate 61 during high-temperature heating and causes failure, greatly improving the reliability of the heating component 60. In a specific embodiment, the substrate 61 is inserted into the aerosol-forming substrate 67 at a position corresponding to at least a part of the heating element 62.

[0031] Specifically, the heating element 62 has a first connection end E and a second connection end F, and at least one of the first electrode 63a and the second electrode 63b extends from the first end M to the second end N, so that one of the first electrode 63a and the second electrode 63b is electrically connected to the first connection end E of the heating element 62, and the other electrode is electrically connected to the second connection end F of the heating element 62, so that the heating element 62 forms a current loop. Compared with the existing method of forming a resistance heating film layer by screen printing or coating on the substrate, the heating element 62 is embedded in the substrate 61. On the one hand, the thickness of the heating element 62 can be increased, so that it will not be deformed or damaged due to the deformation of the substrate 61; on the other hand, the two opposite surfaces of the substrate 61 are both close to the heating element 62, making the heat on the two surfaces more uniform.

[0032] In a specific embodiment, at least one of the first electrode 63a and the second electrode 63b extends from the first end M to a position near the second end N. Of course, in other embodiments, the first electrode 63a and the second electrode 63b may also be located near the first end M, or at the middle position of the substrate 61, and can be specifically designed according to the setting position of the heating element 62 and the series / parallel form, and this embodiment does not limit this.

[0033] Specifically, the substrate 61 can specifically be a rectangular substrate 61. When the heating assembly 60 is inserted into the tobacco, the second end N of the substrate 61 is inserted into the tobacco first. Therefore, to facilitate the insertion of the heating assembly 60 into the tobacco, the second end N of the substrate 61 can specifically be set to a tip, that is, in a triangular structure, and the included angle α1 formed by the two adjacent sides of the tip can specifically be 45 degrees - 90 degrees, such as 60 degrees. Specifically, in this embodiment, the connection between the two sides of the tip and the side of the substrate 61 has a curvature, and the radius R1 corresponding to this curvature can be 1 - 3 millimeters, specifically 1 millimeter.

[0034] Specifically, the substrate 61 can be an insulating ceramic substrate. The thermal conductivity of the insulating ceramic substrate can be 4 - 18 W / (m·K), the flexural strength can be above 600 MPa, the thermal stability can exceed 450 degrees, and the fire resistance can be higher than 1450 degrees. Of course, in other embodiments, the substrate 61 can also be a metal substrate with an insulating coating, such as stainless steel, to improve the strength of the heating assembly 60, prevent the heating assembly 60 from bending or breaking, and at the same time enable the heat generated by the heating element 62 to be diffused to the tobacco in contact with the substrate 61, thereby improving the uniformity of heat reception of the tobacco. The material of the substrate 61 can be zirconia material in one embodiment. This zirconia substrate 61 can insulate and transfer the heat generated by the heating element 62 to provide the energy utilization rate of the heating assembly 60. In other embodiments, the insulating ceramic substrate can also be other ceramics such as ZTA material (toughened zirconia), MTA (mullite and alumina composite). In other embodiments, the heating element 62 can also be made of a metal alloy or a ceramic alloy made of ferrosilicon aluminum alloy.

[0035] In a specific embodiment, with reference to Figure 2, at least one receiving groove 611 may be formed in the substrate 61 along its length direction, and the heating element 62 is specifically received in the receiving groove 611, so that during the process of inserting the heating assembly 60 into tobacco, the substrate 61 is stressed to avoid the problem that the heating element 62 is directly stressed and bent. Specifically, the substrate 61 can be cut by laser according to a preset size to form the receiving groove 611, so as to ensure the dimensional accuracy of the receiving groove 611, and the distances from the receiving groove 611 to the two side edges of the substrate 61 are the same, that is, the receiving groove 611 is centrally arranged along the width direction of the substrate 61. In a specific embodiment, during manufacturing, a glass-ceramic material can be coated on the inner side wall of the receiving groove 611 to bond the substrate 61 and the heating element 62 together, and then the insulating ceramic, glass-ceramic and electrodes are sintered together. Since the glass-ceramic has a high viscosity, the bonding force between the heating element 62 and the substrate 61 can be effectively improved, and the use stability can be enhanced; specifically, the coating thickness can be specifically 0.05-0.1 mm, for example, it can be 0.05 mm.

[0036] Specifically, refer to Figure 2 , in one embodiment, three spaced receiving grooves 611 may be formed in the substrate 61 along its length direction, and the spacing distance L34 can be specifically 2-3 mm, for example, it can be 2.90 mm; specifically, the cross-section of the receiving groove 611 can be specifically strip-shaped and bent or curved, for example, it is in a similar V-shaped (refer to Figure 2 ) or a linear structure (see Figure 8a ); specifically, the heating element 62 formed therein or disposed therein also has a bent or curved shape corresponding to the shape of the receiving groove 611. Specifically, when the receiving groove 611 is in a similar V-shaped structure, the heating element also has a similar V-shaped structure, and when the receiving groove 611 is in a linear structure, the heating element also has a linear structure, that is, the shape of the heating element 62 matches the shape of the receiving groove 611; in a specific embodiment, for the V-shaped heating element 62, the bottom of the V shape faces the first end M and the resistance at the bottom position is relatively large, which conforms to the design that the heat of the heating element 62 diffuses from bottom to top, so that the overall temperature of the heating element 62 is relatively uniform. It can be understood that the cross-sectional shape of the receiving groove 611 is not limited and can be designed according to the shape of the heating element 62.

[0037] In a specific embodiment, the dimensions of the substrate 61 provided with a similar V-shaped receiving groove 611 can be specifically referred to Figure 2 and Figure 3Specifically, the length L31 of the substrate 61 can be specifically 10 - 15 mm, for example, it can be 13.20 mm, the width W31 can be 4 - 6 mm, for example, it can be 5 mm; the length L35 of the V-shaped receiving groove 611 formed in the substrate 61 can be 3 - 4 mm, for example, it can be 3.00 mm, the corresponding effective length is 4.2 mm, the thickness can be 0.3 - 0.6 mm, for example, it can be 0.5 mm, the radius R2 corresponding to the arc formed in the middle of the inner ring edge can be 0.5 - 1 mm, for example, it can be 0.75 mm, the radius R3 corresponding to the arc formed in the middle of the outer ring edge can be 0.5 - 1 mm, for example, it can be 0.75 mm, the radius of the inner wall fillet R4 can be 0.2 - 0.5 mm, for example, it can be 0.25 mm, the radius of the outer fillet R5 can be 1 - 2 mm, for example, it can be 1 mm, the distance W32 from the bottom of the inner ring edge to the bottom of the outer ring edge can be 1 - 2 mm, for example, it can be 1.15 mm, the distance W33 from the bottom of the inner ring edge to the top of the inner ring edge can be 0.5 - 1 mm, for example, it can be 0.82 mm, the distance L32 from the bottom of the inner ring edge to the top of the second end N of the substrate 61 can be 3 - 4 mm, for example, it can be 3.94 mm, the arc α2 formed by the outer ring edge can be 45° - 90°, for example, 90°; it should be noted that the concave part of the V-shaped receiving groove 611 is defined as the inner ring edge, and the convex part is defined as the outer ring edge.

[0038] Specifically, the substrate 61 has a first surface C and a second surface D opposite to the first surface C. The receiving groove 611 can be specifically a through groove penetrating the first surface C and the second surface D. The heating element 62 is specifically received in the through groove. And in one embodiment, the heating element 62 has a first heating surface and a second heating surface opposite to the first heating surface. In a specific embodiment, the first heating surface and the second heating surface of the heating element 62 received in the receiving groove 611 are flush with the first surface C and the second surface D of the substrate 61; wherein, by setting the receiving groove 611 as a through groove structure, the heating element 62 received in the receiving groove 611 can be exposed from one side of the first surface of the substrate 61 and one side of the second surface respectively. Thus, when the heating element 62 is inserted into the tobacco, both surfaces of the heating element 62 can be in direct contact with the tobacco, not only with high energy utilization rate, but also with relatively uniform heating, clear preset temperature field boundary, especially convenient for power instant control and design in low-voltage start. It can be understood that the receiving groove 611 can also be a blind groove or a blind hole.

[0039] In other embodiments, according to the actual requirements of the temperature field distribution during heating, the first heating surface and the second heating surface of the heating element 62 may also slightly protrude from the first surface C and the second surface D of the substrate 61 respectively, or slightly recess from the first surface C and the second surface D respectively. In this way, when the first heating surface and the second heating surface of the heating element 62 protrude from the first surface C and the second surface D of the substrate 61, the relatively high temperature of the heating element 62 can be concentrated on the first heating surface and the second heating surface of the heating element 62, and the tobacco in contact with the first heating surface and the second heating surface can be baked at a relatively high temperature, so as to meet the relatively strong demand for the flue gas. When the first heating surface and the second heating surface of the heating element 62 are slightly recessed (i.e., lower than) the first surface C and the second surface D of the substrate 61, due to the blocking effect of the substrate 61, the contact between the first heating surface and the second heating surface of the heating element 62 and the tobacco can be relatively loose, and the baking temperature of the heating element 62 on the tobacco can be slightly reduced, so as to meet the relatively mild demand for the flue gas.

[0040] Among them, the heating element 62 may specifically be one or more. And in a specific embodiment, the heating element 62 may be a self-supporting structure, that is, the heating element 62 can exist independently without relying on other carriers. Compared with the existing resistance heating circuits formed by printing or coating on a substrate, the self-supporting heating element 62 can effectively avoid the problem that the heating element 62 falls off from the substrate 61 during high-temperature heating or deformation of the substrate 61, greatly improving the reliability of the heating component 60. And because the heating element 62 is a self-supporting structure and can be exposed from one side of the first surface of the substrate 61 and one side of the second surface at the same time, it effectively improves the heat utilization rate and heating uniformity.

[0041] Specifically, the shape of the heating element 62 is not limited and can be designed according to needs. In a specific embodiment, the heating element 62 may be strip-shaped and extend along the width direction of the substrate 61, and be bent or curved. In a specific embodiment, a bending portion or a folding portion is formed in the middle of the strip-shaped heating element 62, and the included angle of the bending portion or the folding portion can be greater than 45 degrees. For example, it can be 90 degrees, 120 degrees or 145 degrees.

[0042] Specifically, the material of the heating element 62 may specifically be conductive ceramic. Compared with the existing metal materials, the heating element 62 made of this conductive ceramic material has a relatively high conductive efficiency and the generated temperature is relatively uniform. And the heating element 62 made of this conductive ceramic can be adjusted and designed at 3-4 watts, and the conductivity can reach 1×10 -4 ohm-1×10 -6 ohm, specifically it can be 5×10 -5Ohm, suitable for low-voltage start-up, facilitating instant power control and design, and the flexural strength of the conductive ceramic can be greater than 40 MPa, and the refractory performance can be higher than 1200 °C; at the same time, the heating element 62 made of this conductive ceramic has the characteristic of full-range starting voltage.

[0043] Specifically, for the heating element 62 made of this conductive ceramic, the material can select an electromagnetic heating wavelength of mid-infrared wavelength, which is beneficial to atomizing e-liquid and improving the taste; in addition, the crystal phase structure of the heating element 62 made of this conductive ceramic is a high-temperature stable oxide ceramic. Since the oxide ceramic has good fatigue resistance, high strength and large density, it can effectively avoid the problems of harmful heavy metal volatilization and dust, and greatly improve the service life of the heating element 62.

[0044] The above-mentioned heating element 62 made of a ceramic whole piece can reduce the area of the highest temperature hot spot, eliminate the risks of fatigue cracking and increased fatigue resistance, and has good consistency; and due to the high strength and smoothness brought by the microcrystalline structure of this ceramic heating material, the surface of the heating element 62 is relatively easy to clean and not easy to adhere; in addition, using the ceramic production process to make the ceramic heating element 62, the process is relatively simple and easy to control, with low cost, which is beneficial to the promotion of industrialization and the improvement of economic benefits.

[0045] Specifically, the heating element 62 made of this conductive ceramic specifically includes the main component and the crystal component; among them, the main component is used for conducting electricity and making the conductive ceramic form a certain resistance, and it can specifically be one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, titanium; the crystal component, that is, the main material of the ceramic material, is mainly used to form the shape and structure of the conductive ceramic, and it can specifically be one or more of lanthanum manganate, strontium lanthanum manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, yttrium oxide. In other embodiments, the heating element 62 can also be made of a metal alloy or a ceramic alloy made by mixing an iron-silicon-aluminum alloy and a ceramic.

[0046] Specifically, the above-mentioned conductive ceramic is a material with TCR characteristics, that is, the temperature and the resistance value have a corresponding relationship. Therefore, during use, the temperature value can be obtained by detecting the resistance value to control the temperature of the heating element 62.

[0047] Among them, the first electrode 63a and the second electrode 63b can be formed by coating; specifically, in one embodiment, the first electrode 63a and the second electrode 63b are both disposed on the substrate 61 and electrically connected to the heating element 62; and in a specific embodiment, the first electrode 63a is directly formed on the surface of the substrate 61, for example, formed on the first surface 63a or the second surface 63b of the substrate 61; in another specific embodiment, two oppositely disposed grooves are formed on the substrate 61, and the first electrode 63a and the second electrode 63b are respectively formed in the two grooves and electrically connected to the first connection end E and the second connection end F of the heating element 62.

[0048] In a specific embodiment, refer to Figure 4a , Figure 4a which is a side view of the heating component provided by the first specific embodiment of the present application; the first electrode 63a and the second electrode 63b respectively include a first part and a second part; among them, the first part of at least one of the first electrode 63a and the second electrode 63b is formed on the surface of the substrate, and the second part is formed on the surface of the heating element 62; further, a first groove is provided at the position of the substrate 61 corresponding to the first part of the electrode, and the first part of the electrode is disposed in the first groove; a second groove is provided at the position of the heating element 62 corresponding to the second part of the electrode, and the second part of the electrode is disposed in the second groove. And in a specific embodiment, the thickness of the first part of the electrode is the same as the depth of the first groove, and the thickness of the second part of the electrode is the same as the thickness of the second groove.

[0049] Furthermore, in a specific embodiment, refer to Figure 4b , Figure 4b which is a side view of the heating component provided by the second specific embodiment of the present application; specifically, the first electrode 63a and the second electrode 63b further include a third part, and the third part of at least one of the first electrode 63a and the second electrode 63b extends to the side surface of the heating element 62 that abuts against the substrate 61.

[0050] In another embodiment, one of the first electrode 63a and the second electrode 63b is disposed on the substrate 61, and the other electrode is disposed on the heating element 62; and the electrode disposed on the heating element 62 can also be directly formed on the surface of the heating element 62 or disposed in a groove of the heating element 62 and electrically connected to the heating element 62. Specifically, the first electrode 63a and the second electrode 63b are formed on the substrate 61 and / or the heating element 62 by coating, which can improve the bonding force between the first electrode 63a and the second electrode 63b and the substrate 61 and / or the heating element 62, thereby improving the connection stability between the electrode leads 66 connected to the first electrode 63a and the second electrode 63b and the heating element 62; it can be understood that the ceramic has a microporous structure, and the microporous structure of the ceramic can still make the formed first electrode 63a and second electrode 63b have a strong bonding force with the substrate 61 and / or the heating element 62 even when the coating thickness is large, thereby greatly improving the bonding force between the first electrode 63a and the second electrode 63b and the substrate 61 and / or the heating element 62. Specifically, the above coating material can be selected as silver paste. It can be understood that the first electrode 63a and the second electrode 63b can also be formed by depositing a metal film, for example, depositing a metal material such as gold, platinum, copper, etc. higher than 1*10 -6 Ohm; the coating length can be 5-8 mm, for example, it can be 6.5 mm, and the coating thickness of the silver electrode can be 0.05-0.1 mm, for example, it can be 0.06 mm.

[0051] In this embodiment, take the case where both the first electrode 63a and the second electrode 63b are disposed on the substrate 61 as an example; specifically, the first electrode 63a and the second electrode 63b are disposed on the same surface of the substrate 61, for example, disposed on the first surface C or the second surface D of the substrate 61; in other embodiments, the first electrode 63a and the second electrode 63b can also be respectively disposed on two surfaces, for example, the first electrode 63a is disposed on the first surface C, and the second electrode 63b is disposed on the second surface D, and the specific selection can be made according to the actual requirements of the lead space. Of course, in other embodiments, the first electrode 63a and the second electrode 63b can also be disposed on both surfaces of the substrate 61 at the same time, that is, the number of both the first electrode 63a and the second electrode 63b is two; this can make the conductive components of the conductive ceramic have shorter current paths near both surfaces of the conductive ceramic, making the temperature fields on both surfaces of the heating element 62 more uniform; at the same time, it is not only convenient for welding, but also can increase the contact area with the heating element 62 of the conductive ceramic as much as possible to reduce the contact resistance, so that less heat is generated when the heating element 62 is energized, the temperature is reduced, and when the two surfaces of the heating element 62 of the conductive ceramic are energized at the same time, the same electric potential is formed on the two surfaces, which is beneficial to making the electric field of the conductive components between the two surfaces uniform and the heating effect better.

[0052] In one embodiment, there are at least two heating elements 62, and at least two heating elements 62 are arranged in parallel between the first electrode 63a and the second electrode 63b; since the at least two heating elements 62 in this embodiment are connected in parallel, the size of each heating element 62 can be made smaller, so that there is no need to provide a supporting boss 65 in the receiving groove 611 of the substrate 61 (see below). Figure 4c ) to support each heating element 62, and also to ensure a good bonding force between the heating element 62 and the substrate 61; at the same time, this can make the volume of the entire heating element 62 smaller, thereby saving electricity and facilitating processing. Specifically, the first electrode 63a and the second electrode 63b are arranged in parallel and spaced apart and both extend from the first end M to the second end N of the substrate 61. The three heating elements 62 are arranged in parallel and spaced apart along the length direction of the substrate 61 and between the first electrode 63a and the second electrode 63b, and one end of each heating element 62 is electrically connected to the first electrode 63a, and the other end is electrically connected to the second electrode 63b. In a specific embodiment, portions of the first electrode 63a and the second electrode 63b can be coated on the surface of the end of the heating element 62 to achieve electrical connection between the heating element 62 and the first electrode 63a and the second electrode 63b.

[0053] Of course, in other embodiments, see Figure 4c and Figure 5 ,in, Figure 4c A side view of a heating component provided in a third embodiment of the present application; Figure 5 A side view of a heating component provided in the fourth specific embodiment of the present application; a support boss 65 may also be provided on the inner wall surface of the accommodating groove 611 at a position close to the second surface of the substrate 61, and the heating element 62 is specifically overlapped on the surface of the support boss 65 away from the second surface of the substrate 61; specifically, in this embodiment, the thickness of the heating element 62 may be less than the thickness of the substrate 61, and one side surface of the heating element 62 is flush with the first surface C of the substrate 61, and the other side surface is lower than the second surface D. For the specific structure, see Figure 4c Of course, the thickness of the heating element 62 can also be the same as the thickness of the substrate 61, and the two opposite surfaces of the heating element 62 are flush with the first surface C and the second surface D of the substrate 61 respectively. At the same time, the position corresponding to the heating element 62 and the supporting boss 65 is provided with a relief portion so that the heating element 62 overlaps the supporting boss 65, thereby preventing the heating element 62 from falling from the receiving groove 611 of the substrate 61. For the specific structure, please refer to Figure 5 .

[0054] For details, see Figures 1a to 3, specifically, there may be three heating elements 62, and the three heating elements 62 are arranged at intervals along the length direction of the substrate 61. The interval distance L34 may be 2-3 millimeters, for example, specifically may be 2.90 millimeters; and the first connection end E and the second connection end F of the heating element 62 are arranged opposite to each other along the width direction of the substrate 61; specifically, the three heating elements 62 are specifically accommodated in Figure 2 or Figure 3 the accommodation groove 611 of the substrate 61 shown, and its corresponding structure and dimensions are the same as those of the accommodation groove 611 shown in Figure 2 and Figure 3 . For details, reference can be made to the above text description. In this embodiment, the substrate 61 is inserted with an aerosol-forming substrate 67 at least at the position corresponding to the heating element 62.

[0055] Specifically, in this embodiment, both the first electrode 63a and the second electrode 63b are arranged on the substrate 61 and extend from the first end M of the substrate 61 to a position close to the second end N; specifically, the first electrode 63a and the second electrode 63b are located on opposite sides of the heating element 62, and the first connection end E and the second connection end F of each heating element 62 extend to both sides of the substrate 61 to be respectively connected to the first electrode 63a and the second electrode 63b, so as to form a current loop and at the same time make the heating elements 62 connected in parallel. Specifically, the thickness of the silver electrode coating may be 0.05-0.1 millimeter, for example, may be 0.06 millimeter.

[0056] In a specific embodiment, referring to Figure 6 , Figure 6 is a side view of a heating assembly provided in an embodiment of the present application. A protective layer 64 is also coated on at least one surface of the substrate 61, and the protective layer 64 covers the heating element 62 and the first electrode 63a and the second electrode 63b to prevent the smoke oil formed when heating tobacco from damaging the first electrode 63a, the second electrode 63b and the heating element 62; further, the protective layer 64 can also cover the entire substrate 61, so that the entire heating assembly 60 has a smooth surface. Among them, the protective layer 64 may specifically be a glass glaze layer.

[0057] The heating component 60 provided in this embodiment is configured with a substrate 61 and a heating element 62 to heat the tobacco through the heating element 62. Meanwhile, the heating element 62 is embedded in the substrate 61, which can effectively improve the strength of the heating component 60. When the heating component 60 is inserted into the tobacco, the substrate 61 can bear the force, effectively avoiding the problem of the heating element 62 being bent or broken due to the force. Moreover, compared with the existing resistive heating circuits formed by screen printing or coating on the substrate, the substrate 61 and the heating element 62 of the present application can be directly and independently inserted into the aerosol-forming matrix 67, and there will be no problem of failure caused by the heating element 62 falling off the substrate 61 during high-temperature heating or deformation of the substrate 61, greatly improving the reliability of the heating component 60. In addition, by providing a first electrode 63a and a second electrode 63b, and making at least one of the first electrode 63a and the second electrode 63b extend from the first end M of the substrate 61 to the second end N, one of the first electrode 63a and the second electrode 63b is electrically connected to the first connection end E of the heating element 62, and the other electrode is electrically connected to the second connection end F of the heating element 62, so that the heating element 62 forms a current loop. In addition, by providing a protective layer 64, it can effectively prevent the tobacco oil formed during tobacco heating from damaging the first electrode 63a, the second electrode 63b, and the heating element 62.

[0058] In another embodiment, refer to Figure 7 , Figure 7 which is a schematic structural diagram of the heating component provided in the second embodiment of the present application. A heating component 60 is provided. Different from the heating component 60 provided in the above first embodiment, three heating elements 62 are connected in series to form a heating element, and only one of the first electrode 63a and the second electrode 63b extends from the first end M of the substrate 61 to a position near the second end N of the substrate 61. In a specific embodiment, the first electrode 63a can extend from the first end M of the substrate 61 to a position near the second end N of the substrate 61, while the second electrode 63b is provided at the first end M of the substrate 61 (refer to Figure 7 ), and the following embodiments will take this as an example. Of course, it can also be that the second electrode 63b extends from the first end M of the substrate 61 to a position near the second end N of the substrate 61, while the first electrode 63a is provided at the first end M of the substrate 61.

[0059] Specifically, refer to Figure 7, in this embodiment, the heating elements 62 may specifically be three, and the second connection end F of one heating element 62 and the first connection end E of another heating element 62 among every two adjacent heating elements 62 are connected to form an integral bent heating element; one end of the heating element is connected to the first electrode 63a, and the other end is connected to the second electrode 63b to form an entire current loop. Of course, in other specific embodiments, the first electrode 63a and the second electrode 63b may also both extend to a position close to the second end N of the substrate 61, and this embodiment does not limit this, as long as one end of the heating element is connected to the first electrode 63a and the other end is connected to the second electrode 63b.

[0060] Compared with the heating assembly 60 provided in the above first embodiment, the heating assembly 60 provided in this embodiment can not only effectively improve the strength of the heating assembly 60, so that during the process of inserting the heating assembly 60 into tobacco, the substrate 61 can be stressed, effectively avoiding the problem that the heating element 62 is bent due to stress; at the same time, there is no need to extend the second electrode 63b to a position close to the second end N of the substrate 61, the process is simpler, the cost is lower, and at least two heating elements ⑥ are connected into an integral heating element to be connected to the first electrode 63a and the second electrode 63b, which can avoid the problem that some heating elements 62 are ineffective due to poor contact with the first electrode 63a and / or the second electrode 63b.

[0061] In another embodiment, refer to Figure 8a , Figure 8a is a schematic structural diagram of the heating assembly provided in the third embodiment of the present application; different from the heating assemblies 60 provided in the above first and second embodiments, the heating elements 62 extend along the length direction of the substrate 61. Specifically, one of the first electrode 63a and the second electrode 63b is disposed on the substrate 61 and extends from the first end M to a position close to the second end N, and is electrically connected to the second connection end F of the heating element 62, and the other electrode is disposed at the first connection end E of the heating element 62.

[0062] Specifically, in this embodiment, the heating element 62 extends from the first end M of the substrate 61 to a position close to the second end N, and it may specifically be in a long strip shape, and the part of the heating element 62 close to the first end M forms the first connection end E of the heating element 62, and the part of the heating element 62 close to the second end N forms the second connection end F of the heating element 62. In a specific embodiment, among the first electrode 63a and the second electrode 63b, the first electrode 63a extends from the first end M of the substrate 61 to the second end N of the substrate 61 to be electrically connected to the second connection end F of the heating element 62, and the second electrode 63b is disposed at the first connection end E of the heating element 62. In a specific embodiment, refer to Figure 8b , Figure 8bThe side view of the heating component provided by the fifth specific embodiment of the present application; the position of the heating element 62 corresponding to the second electrode 63b is lower than the surface of the substrate 61, thereby forming a groove, and the second electrode 63b is specifically formed in the groove.

[0063] Specifically, in a specific embodiment, refer to Figure 8a , the first electrode 63a may specifically include a first electrode portion 63a1 and a second electrode portion 63a2 that are vertically arranged. Among them, the first electrode portion 63a1 is arranged on one side surface of the substrate 61 connected to the first surface C, and extends from the first end M of the substrate 61 to a position near the second end N. The second electrode portion 63a2 is electrically connected to one end of the first electrode portion 63a1 near the second end N, and is arranged on the first surface C of the substrate 61 and near the second end N to be electrically connected to the second connection end F.

[0064] Specifically, in this embodiment, the heating element 62 includes a first heating area A and a second heating area B connected to the first heating area A. Among them, the first heating area A is the main atomization area for inserting tobacco for heating, and the atomization temperature thereon is concentrated between 280°C and 350°C, accounting for more than 75% of the area of the atomization area. The second heating area B is the main matching section of the heating element 62, and the temperature is below 150°C; in a specific embodiment, the second electrode 63b is specifically arranged in the second heating area B of the heating element 62 to reduce the atomization temperature of the ceramic heating element 62; specifically, the ratio of the heating temperature of the first heating area A of the heating element 62 to the heating temperature of the second heating area B is greater than 2.

[0065] In a specific embodiment, the resistivity of the material of the part of the heating element 62 located in the second heating area B is less than the resistivity of the material of the part of the heating element 62 located in the first heating area A, so that the temperature of the first heating area A of the heating element 62 is greater than the temperature of the second heating area B; at the same time, by setting materials with different resistivities in different heating areas, the temperature of different heating areas can be regulated through the resistivity difference; specifically, the main component of the ceramic material of the part of the heating element 62 located in the first heating area A is basically the same as that of the part of the heating element 62 located in the second heating area B and is integrally formed, but the proportion of the ceramic material of the part of the heating element 62 located in the first heating area A and the part of the heating element 62 located in the second heating area B is different or other components are different, so that the resistivity of the part of the heating element 62 located in the first heating area A is different from that of the part of the heating element 62 located in the second heating area B. Compared with the prior art, the first heating area A and the second heating area B adopt different conductive materials, such as an aluminum film and a gold film, and the scheme of splicing two different conductive materials can effectively avoid the problem of the conductor breakage of the first heating area A and the second heating area B of the heating element 62.

[0066] In this embodiment, refer to Figure 9 ,Figure 9 This is a side view of the heating assembly provided in the sixth specific embodiment of the present application; in order to ensure the bonding force between the heating element 62 and the substrate 61 and prevent the heating element 62 from falling out of the receiving groove 611 of the substrate 61, a support boss 65 that is smaller than the thickness of the heating element 62 in the thickness direction of the heating element 62 can be provided on the inner side wall of the receiving groove 611 close to the second surface D of the substrate 61 to support the heating element 62. The specific structure can be seen in Figure 9 Specifically, in one embodiment, the thickness H of the heating element 62 may be 0.4-0.5 mm, for example, 0.4 mm; the resistance may be 0.3-1 ohm, for example, 0.6 ohm; and the resistivity may be 1*10 -4 -3*10 -4 Ohm, for example, 2*10 -4 Ohm; the power used can be 1 watt to 3 watts, specifically 2.5 watts.

[0067] Specifically, in this embodiment, the aerosol-forming matrix 67 is inserted into at least part or all of the first heating area A of the substrate 61 corresponding to the heating element 62; of course, in other embodiments, the aerosol-forming matrix 67 may also be inserted into part of the second heating area B of the substrate 61 corresponding to the heating element 62.

[0068] Compared with the heating component 60 provided in the second embodiment, the heating component 60 provided in this embodiment extends the first electrode 63a to a position close to the second end N of the substrate 61 so as to be electrically connected to the second connection end F of the heating element 62; and directly sets the second electrode 63b on the first connection end E of the heating element 62 to form a current loop between the first connection end E and the second connection end F of the heating element 62 while ensuring effective connection between the two; wherein, by setting the first electrode portion 63a1 of the second electrode 63b on one side of the substrate 61, the utilization rate of the surface of the substrate 61 is effectively improved while preventing the short circuit problem between the first electrode portion 63a1 and the heating element 62.

[0069] In another specific embodiment, see Figure 10 , Figure 10 A schematic structural diagram of a heating component provided for the fourth embodiment of the present application; unlike the third embodiment described above, the first electrode portion 63a1 is entirely disposed on the first surface C of the substrate 61, and is electrically connected to the second electrode portion 63a2 disposed on the substrate 61 near the second end N, thereby achieving electrical connection with the second connection end F of the heating element 62; specifically, in this embodiment, the second electrode 63b is also disposed at the first connection end E of the heating element 62.

[0070] The heating component 60 provided in this embodiment, compared with the heating component 60 provided in the above-mentioned third embodiment, by disposing the first electrode portion 63a1 on the first surface C of the substrate 61, not only can ensure that the first electrode 63a and the second electrode 63b connect the heating element 62, but also can avoid the problem of short circuit between the first electrode portion 63a1 and the heating element 62, and at the same time, can prevent the smoke oil formed during heating of the tobacco from penetrating into the gap between the first electrode portion 63a1 and the side surface of the substrate 61 under the action of gravity, thereby affecting the bonding force between the two; and effectively ensures the bonding strength between the second electrode portion 63a2 and the substrate 61; in addition, this can further reduce the volume of the heating component 60.

[0071] Specifically, in this embodiment, refer to Figure 11 , Figure 11 which is a side view of the heating component provided in the seventh specific embodiment of the present application; in order to ensure the bonding force between the heating element 62 and the substrate 61 and prevent the heating element 62 from falling out of the accommodation groove 611 of the substrate 61, a support boss 65 can be provided on the inner wall surface of the accommodation groove 611 of the heating element 62 to support the heating element 62. For the specific structure, refer to Figure 11 ; in a specific embodiment, the support boss 65 can be integrally formed with the substrate 61 to provide support strength.

[0072] Please refer to Figure 12 , Figure 12 which is a schematic structural diagram of an electronic atomization device provided in an embodiment of the present application; in this embodiment, an aerosol forming device 600 is provided, and the aerosol forming device 600 includes a housing 601 and a heating component 60, a mounting seat 70 and a power supply component 80 disposed in the housing 601.

[0073] Among them, the heating component 60 can specifically be the heating component 60 provided in any of the above embodiments. For its specific structure and function, refer to the above relevant text descriptions and will not be elaborated here; specifically, the heating component 60 is disposed on the mounting seat 70 and is fixedly mounted on the inner wall surface of the housing 601 through the mounting seat 70; the power supply component 80 is connected to the heating component 60 and is used to supply power to the heating component 60; and in one embodiment, the power supply component 80 can specifically be a rechargeable lithium-ion battery.

[0074] Specifically, for the specific structure of the heating component 60 mounted on the mounting seat 70, refer to the above Figure 1a , Figure 7 , Figure 8a ; specifically, refer to Figure 1a , the mounting seat 70 includes a mounting main body 71 and a mounting hole 72, and the heating component 60 is specifically inserted into the mounting hole 72 of the mounting seat 70 to be fixed to the mounting seat 70; the portion of the substrate 61 without the heating element 62 is inserted into the mounting hole 72 of the mounting seat 70.

[0075] Specifically, when the heating component 60 is Figure 8a In the structure shown, the second heating area B of the heating component 60 is inserted into the mounting hole 72 of the mounting base 70 to be fixed to the mounting base 70; and after the tobacco is inserted, the end of the tobacco abuts against the upper surface of the mounting base 70. Specifically, the side wall of the mounting hole 72 is provided with an escape groove, and the electrode lead 66 specifically extends into the mounting base 70 through the escape groove to connect with the first electrode 63a and the second electrode 63b. For further information, see Figure 8a At least two clamping parts 73 are also provided on the mounting body 71 , and the mounting seat 70 is fixed to the housing 601 of the aerosol forming device 600 through the clamping parts 73 .

[0076] Further, see Figure 8a One side of the mounting body 71 may also be provided with an extension groove 74 that communicates with the mounting hole 72. The extension groove 74 may be specifically provided on a side surface facing away from the second end portion N of the substrate 61, and the extension groove 74 is consistent with the shape of the portion of the heating component 60 used to be inserted into the mounting seat 70. For example, if the shape of the portion of the heating component 60 used to be inserted into the mounting seat 70 is rectangular, the shape of the extension groove 74 is also rectangular, and the size of the extension groove 74 matches the portion of the heating component 60 used to be inserted into the mounting seat 70, so that the portion of the heating component 60 inserted into the mounting seat 70 is reinforced by the extension groove 74 to prevent it from breaking. In a specific embodiment, two extension grooves 74 are provided on the mounting seat 70, and the two extension grooves 74 are arranged perpendicularly to each other.

[0077] Specifically, the material of the mounting seat 70 can be an organic or inorganic material with a melting point above 160 degrees, for example, it can be PEEK material; the mounting seat 70 can be bonded to the heating component 60 by an adhesive, and the adhesive can be a high-temperature resistant glue.

[0078] The aerosol forming device 600 provided in this embodiment heats tobacco through the heating element 60 by providing a substrate 61 and a heating element 62 in the heating element 60. At the same time, the heating element 62 is embedded in the substrate 61, which can effectively improve the strength of the heating element 60, so that when the heating element 60 is inserted into the tobacco, the substrate 61 can bear the force, effectively avoiding the problem that the heating element 62 is bent due to the force. Moreover, compared with the existing resistive heating circuits formed by screen printing or coating on the substrate, the substrate 61 and the heating element 62 of the present application can be directly and independently inserted into the aerosol forming matrix 67, and there will be no problem that the heating element 62 falls off the substrate 61 during high-temperature heating, resulting in failure, greatly improving the reliability of the heating element 60. In addition, by providing a first electrode 63a and a second electrode 63b, and making at least one of the first electrode 63a and the second electrode 63b extend from the first end M of the substrate 61 to the second end N, so that one of the first electrode 63a and the second electrode 63b is electrically connected to the first connection end E of a heating element 62, and the other electrode is electrically connected to the second connection end F of the heating element 62, so that the heating element 62 forms a current loop, which not only can avoid short-circuit problems, but also has a relatively simple process and a high strength of the heating element 60.

[0079] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A heating component, characterized in that, Comprising: A substrate configured to be at least partially inserted into an aerosol-forming substrate, and the substrate has a first end and a second end; the second end of the substrate is provided as a tip; At least one heating element embedded in the substrate, and the heating element has a first connection end and a second connection end opposite to the first connection end; A first electrode and a second electrode, at least one of the first electrode and the second electrode extends from the first end to the second end, and one of the first electrode and the second electrode is electrically connected to the first connection end, and the other electrode is electrically connected to the second connection end; wherein, the at least one heating element is configured to be inserted into the aerosol-forming substrate and generate heat by being powered by the first electrode and the second electrode; Only the first electrode of the first electrode and the second electrode extends from the first end of the substrate to a position close to the second end; the heating element extends from the first end of the substrate to a position close to the second end; The first electrode includes a first electrode portion and a second electrode portion arranged vertically; wherein, the first electrode portion is arranged on a side surface of the substrate connected to the first surface and extends from the first end of the substrate to a position close to the second end; the second electrode portion is electrically connected to an end of the first electrode portion close to the second end and is arranged on the first surface of the substrate and close to the second end to be electrically connected to the second connection end; the second electrode is arranged at the first connection end of the heating element and is electrically connected to the first connection end.

2. The heating component according to claim 1, wherein At least one of the first electrode and the second electrode is formed on the surface of the substrate and is electrically connected to the heating element.

3. The heating component according to claim 2, wherein, The first electrode and the second electrode respectively include a first part and a second part, wherein, the first part of at least one of the first electrode and the second electrode is formed on the surface of the substrate, and the second part is formed on the surface of the heating element.

4. The heating component according to claim 2, wherein The substrate is provided with a first groove at a position corresponding to the first part of the electrode, and the first part of the electrode is arranged in the first groove; the heating element is provided with a second groove at a position corresponding to the second part of the electrode, and the second part of the electrode is arranged in the second groove.

5. The heating component according to claim 4, wherein The thickness of the first part of the electrode is the same as the depth of the first groove; the thickness of the second part of the electrode is the same as the depth of the second groove.

6. The heating component according to claim 3, characterized in that The first electrode and the second electrode further include a third part, and the third part of at least one of the first electrode and the second electrode extends to a side surface of the heating element in contact with the substrate.

7. The heating component according to claim 1, characterized in that, The substrate is an insulating ceramic and a receiving groove is provided on the substrate; the heating element is a conductive ceramic and is embedded in the receiving groove.

8. The heating component according to claim 7, characterized in that The receiving groove is a through groove penetrating the substrate, so that the heating element is exposed from opposite two surfaces of the substrate.

9. The heating component according to claim 1, wherein The first electrode and the second electrode both extend from the first end of the substrate to a position near the second end; there are at least two heating elements, the at least two heating elements are arranged at intervals along the length direction of the substrate, and the at least two heating elements are connected in parallel between the first electrode and the second electrode.

10. The heating component according to claim 9, wherein The heating element is strip-shaped and bent or curved.

11. The heating component according to claim 1, wherein The second electrode is entirely arranged on the heating element, and the position of the heating element corresponding to the second electrode is lower than the surface of the substrate so as to form a groove, and the second electrode is formed in the groove.

12. The heating component according to claim 11, wherein, The heating element includes a first heating area and a second heating area connected to the first heating area. The first electrode is arranged on the second heating area of the heating element, and the second electrode part is electrically connected to the second connection end located in the first heating area of the heating element; the ratio of the heating temperature of the first heating area to the heating temperature of the second heating area is greater than 2.

13. The heating component according to claim 1, characterized in that, It further includes a protective layer, which is coated on the surface of the substrate and covers the heating element, the first electrode and the second electrode.

14. The heating component according to claim 1, characterized in that, The heating element includes a main component and a crystal component; the main component is one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, titanium, and the crystal component is one or more of lanthanum manganate, strontium lanthanum manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, yttrium oxide.

15. The heating component according to claim 1, characterized in that, The heating element has a first heating surface and a second heating surface opposite to the first heating surface; the first heating surface is flush with the first surface of the substrate, or recessed from or protruding from the first surface of the substrate; The second heating surface is flush with the second surface of the substrate, or recessed from or protruding from the second surface of the substrate.

16. An aerosol-forming device, characterized in that, It includes: a housing and a heating component and a power supply component arranged in the housing; wherein, the power supply component is connected to the heating component for supplying power to the heating component, and the heating component is the heating component according to any one of claims 1-15.

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