Heating components and aerosol forming devices

Abstract

The present application provides a heating component and an aerosol-forming device. The heating component includes a heating element, a first electrode, and a second electrode. The heating element is used to insert and heat an aerosol-forming matrix, and the heating element has a first connection end and a second connection end opposite the first connection end. The first electrode is disposed at the first connection end of the heating element and is electrically connected to the first connection end. One end of the second electrode is electrically connected to the second connection end and the other end extends toward the first connection end of the heating element. The first electrode and the second electrode are insulated from each other. The heating component can avoid the problem of the heating element falling off the substrate during high-temperature heating, causing failure, and greatly improves the stability of the heating component.

Description

Technical Field

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

[0002] As a substitute for cigarettes, electronic cigarettes are gaining more and more attention and favor due to their advantages such as safety, convenience, health and environmental protection. For example, heat-not-burn electronic cigarettes, also known as heat-not-burn aerosol-forming devices.

[0003] Existing heat-not-burn aerosol-forming devices typically utilize either tubular peripheral heating or centrally embedded heating. Tubular peripheral heating involves surrounding a heating tube around an aerosol-forming substrate (e.g., tobacco) to heat the substrate, while centrally embedded heating involves inserting a heating element into the substrate to heat the substrate. Heating elements are widely used due to their simplicity of manufacture and ease of use. Currently, heating elements primarily utilize a ceramic or insulated metal substrate, upon which a resistive heating circuit is printed or plated. This circuit is then fixed to the substrate through a high-temperature treatment.

[0004] However, since the resistive heating circuit on the existing heating component is a thin film that is printed or plated on the substrate later, during the use of the heating component repeatedly inserted into the aerosol-forming matrix, the resistive heating circuit is easily detached from the substrate when subjected to high-temperature heating due to the bending deformation of the substrate, resulting in poor stability. In addition, during the heating process, the resistive heating circuit only contacts the aerosol-forming matrix on the side of the substrate where the resistive heating circuit is provided, but not the aerosol-forming matrix on the back side of the substrate, resulting in poor heating uniformity of the aerosol-forming matrix. Summary of the Invention

[0005] The present application provides a heating component and an aerosol forming device. The heating component can solve the problem that the resistance heating circuit on the existing heating component is easy to fall off from the substrate when heated at high temperature, has poor stability, and during the heating process, the resistance heating circuit has poor heating uniformity on the aerosol forming matrix.

[0006] To address the above technical issues, this application adopts a technical solution: providing a heating assembly. The heating assembly includes a heating element, a first electrode, and a second electrode. The heating element is used to insert into and heat an aerosol-forming substrate, and has a first connection end and a second connection end opposite the first connection end. The first electrode is disposed at and electrically connected to the first connection end of the heating element. The second electrode has one end electrically connected to the second connection end and the other end extending toward the first connection end of the heating element, and the first and second electrodes are insulated from each other.

[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 provided in the present application is provided with a heating element so as to heat the aerosol-forming matrix through the heating element after the aerosol-forming matrix is inserted; compared with the existing resistive heating circuit formed by silk-screening or coating on the substrate, the heating element can be directly and independently inserted into the aerosol-forming matrix, and there will be no problem of the heating element falling off from the substrate and causing failure when subjected to high-temperature heating, thereby greatly improving the stability of the heating component; at the same time, by providing a first electrode and a second electrode insulated from the first electrode, and providing the first electrode at the first connection end of the heating element and electrically connecting it to the first connection end, and electrically connecting one end of the second electrode to the second connection end, so as to form a current loop between the first connection end and the second connection end of the heating element, not only can the short circuit problem be avoided, but the processing technology is also simpler, thereby effectively improving the 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 inserting a heating element into an aerosol-forming substrate according to an embodiment of the present application;

[0011] Figure 2 A specific embodiment of the present application provides Figure 1a a disassembled schematic diagram of the structure shown;

[0012] Figure 3 Another specific embodiment of the present application provides Figure 1a a disassembled schematic diagram of the structure shown;

[0013] Figure 4 A cross-sectional view of heating elements provided in parallel according to an embodiment of the present application;

[0014] Figure 5 A cross-sectional view of heating elements provided in parallel according to another embodiment of the present application;

[0015] Figure 6 A schematic structural diagram of a heating component provided in the second embodiment of the present application;

[0016] Figure 7 A specific embodiment of the present application provides Figure 6 a disassembled schematic diagram of the structure shown;

[0017] Figure 8 A schematic diagram of the structure of a heating component in which the entire surface of a heating rod is coated with a protective layer according to an embodiment of the present application;

[0018] Figure 9 A schematic structural diagram of an aerosol forming device provided in one embodiment of the present application;

[0019] Figure 10 This is a front view of the mounting base and the heating component after assembly provided by one embodiment of the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0022] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0024] See also Figures 1a to 2 ,in, Figure 1a A schematic structural diagram of a heating component provided in the first embodiment of the present application; Figure 1b A schematic diagram of inserting a heating element into an aerosol-forming substrate according to an embodiment of the present application; Figure 2 A specific embodiment of the present application provides Figure 1a Schematic diagram of the disassembly structure shown; In this embodiment, a heating component 90 is provided, and the heating component 90 can be specifically used to insert and heat the aerosol-forming substrate 98. For example, in a specific embodiment, the heating component 90 can be specifically used to insert tobacco to heat the tobacco. The following embodiments are all based on this example; It can be understood that in this embodiment, the aerosol-forming substrate 98 can specifically be tobacco; wherein, the schematic diagram of the heating component 90 inserted into the aerosol-forming substrate 98 can be seen in Figure 1b .

[0025] Specifically, the heating component 90 includes a heating element 91 , a first electrode 92 a and a second electrode 92 b .

[0026] Among them, the heating element 91 is used to insert into and heat the aerosol-forming matrix 98; compared with the existing resistive heating circuit formed by silk-screen printing or coating on the substrate, the heating element 91 can be directly and independently inserted into the aerosol-forming matrix 98, and there will be no problem of the heating element 91 falling off from the substrate and causing failure when subjected to high-temperature heating, which greatly improves the stability of the heating component 90; specifically, the heating element 91 has a first connection end E and a second connection end F. When the heating element 91 is inserted into the tobacco, the second connection end F of the heating element 91 is inserted into the tobacco first. Therefore, in order to facilitate the insertion of the heating element 91 into the tobacco, the second connection end F of the heating element 91 can be specifically set to a tip, that is, a triangular structure to form a tip portion D; and the angle formed by the two adjacent sides of the tip can be specifically 45 degrees to 90 degrees, for example 60 degrees. Specifically, the first electrode 92a and the second electrode 92b are disposed at the first connection end E of the heating element 91. The first electrode 92a is electrically connected to the first connection end E of the heating element 91, while the second electrode 92b is insulated from the first connection end E of the heating element 91 to prevent short circuits. The second electrode 92b extends from the first connection end E of the heating element 91 to the second connection end F and is electrically connected to the second connection end F, thereby forming a current loop between the first connection end E and the second connection end F of the heating element 91. This not only simplifies the manufacturing process, but also effectively improves the overall strength of the heating assembly 90, while also reducing adhesion to tobacco and atomized tobacco liquid during use.

[0027] Specifically, the shape and size of the heating element 91 are not limited and can be designed as needed. In a specific embodiment, the heating element 91 is in a strip shape, such as a rectangle with one end of the rectangle forming a tip.

[0028] For details, see Figure 1a The heating element 91 includes a first heating zone A and a second heating zone B connected to the first heating zone A, wherein the first heating zone A is the main atomization area for inserting the aerosol-forming matrix 98 for heating, and the atomization temperature thereon is concentrated in the range of 280°C to 350°C, accounting for more than 75% of the area of the atomization area, and the second heating zone B is the main matching section of the heating element 91, and the temperature is below 150°C. Specifically, the ratio of the heating temperature of the first heating zone A of the heating element 91 to the heating temperature of the second heating zone B may be greater than 2; in a specific embodiment, the first electrode 92a is specifically arranged in the second heating zone B of the heating element 91 to reduce the atomization temperature of the ceramic heating element 91 located in the second heating zone B; it can be understood that the first connection end E of the heating element 91 is located at the position where the second heating zone B of the heating element 91 is located, and the second connection end F is located at the position where the first heating zone A of the heating element 91 is located.

[0029] In one specific embodiment, the resistivity of the material of the portion of the heating element 91 located in the second heating zone B is lower than the resistivity of the material of the portion of the heating element 91 located in the first heating zone A, so that the temperature of the first heating zone A of the heating element 91 is higher than the temperature of the second heating zone B. At the same time, by providing materials with different resistivities in different heating zones, the temperature of the different heating zones can be controlled by the resistivity difference. Specifically, the ceramic material of the portion of the heating element 91 located in the first heating zone A and the portion of the heating element 91 located in the second heating zone B are substantially identical in composition and are integrally formed, but the proportion of ceramic material or other components of the portion of the heating element 91 located in the first heating zone A and the portion of the heating element 91 located in the second heating zone B are different, resulting in a different resistivity between the portion of the heating element 91 located in the first heating zone A and the portion of the heating element 91 located in the second heating zone B. Compared to the prior art, in which the first heating zone A and the second heating zone B use different conductive materials, such as aluminum film and gold film, the solution of splicing the two different conductive materials can effectively avoid the problem of conductor breakage in the first heating zone A and the second heating zone B of the heating element 91.

[0030] In a specific embodiment, only most of the first heating zone A and the second heating zone B of the heating element 91 are inserted into the aerosol-forming matrix 98, while a small part of the first heating zone A and the second heating zone B remain outside the aerosol-forming matrix 98; or the entire first heating zone A is inserted into the aerosol-forming matrix 98, while the second heating zone B remains outside the aerosol-forming matrix 98; or the entire first heating zone A is inserted into the aerosol-forming matrix 98, and a small part of the second heating zone B is also inserted into the aerosol-forming matrix 98, and only most of the second heating zone B remains outside the aerosol-forming matrix 98.

[0031] Among them, the above-mentioned heating element 91 can specifically be a self-supporting structure, that is, the heating element 91 can exist independently without relying on other carriers; compared with the existing resistance heating circuit formed by silk screen printing or coating on the substrate, the heating element 91 with a self-supporting structure can effectively avoid the problem of falling off from the substrate when subjected to high-temperature heating, thereby greatly improving the stability of the heating component 90; and because the heating element 91 is a self-supporting structure and does not require a substrate, the two opposite surfaces of the heating element 91 can be in direct contact with the tobacco, which not only has a high energy utilization rate, but also heats the tobacco more evenly, and the preset temperature field boundary is clear, especially low-voltage starting facilitates instant power control and design.

[0032] The material of the heating element 91 can be conductive ceramic. Compared with the existing metal material, the heating element 91 made of ceramic material has a higher conductivity efficiency and the temperature generated by heating is more uniform. The heating element 91 made of ceramic can be adjusted and designed at 3-4 watts, and the conductivity can reach 1*10 -4 Ohm-1*10 -6 Ohm, bending strength greater than 40MPa, fire resistance higher than 1200℃; at the same time, the ceramic heater 91 has the characteristic of full-range starting voltage. Specifically, the ceramic heater 91 includes a main component and a crystal component; wherein the main component may be one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, and titanium, and the crystal component may be one or more of lanthanum manganate, strontium lanthanum manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, and yttrium oxide. In other embodiments, the heater 91 may also be made of a metal alloy or a ceramic alloy made of an iron-silicon-aluminum alloy.

[0033] Specifically, the electromagnetic heating wavelength of the material of the ceramic heating element 91 is a mid-infrared wavelength, which is conducive to atomizing the e-liquid and improving the taste; in addition, the crystal phase structure of the ceramic heating element 91 is a high-temperature stable oxide ceramic. Since oxide ceramics have good fatigue resistance, high strength and high density, they can effectively avoid the volatilization of harmful heavy metals and dust problems, thereby greatly improving the service life of the heating element 91.

[0034] It is understandable that the use of a whole ceramic heating element 91 can reduce the area of the highest temperature hotspot, eliminate the risk of fatigue cracking and increased fatigue resistance, and have good consistency; and due to the high strength of the ceramic heating material and the smoothness brought by the microcrystalline structure, the surface of the heating element 91 is easier to clean and less likely to adhere; in addition, the use of ceramic production technology to manufacture the ceramic heating element 91 is relatively simple and easy to control, with low cost, which is conducive to the promotion of production and improvement of economic benefits. Furthermore, the above-mentioned conductive ceramic can be a material with TCR characteristics, that is, there is a corresponding relationship between temperature and resistance. Therefore, during use, the temperature value can be obtained by detecting the resistance value to control the temperature of the heating element 91.

[0035] Among them, the first electrode 92a and the second electrode 92b can be arranged on the surface of the heating element 91 in a coating manner to improve the bonding force between the first electrode 92a and the second electrode 92b and the heating element 91, thereby improving the connection stability between the electrode lead 95 connected to the first electrode 92a and the second electrode 92b and the heating element 91; it can be understood that the ceramic has a microporous structure, and the microporous structure of the ceramic can make the bonding force between the formed first electrode 92a and the second electrode 92b and the heating element 91 still strong even when the coating thickness is large, thereby greatly improving the bonding force between the first electrode 92a and the second electrode 92b and the heating element 91. Specifically, the above-mentioned coating material can be selected from silver paste. It can be understood that the first electrode 92a and at least part of the second electrode 92b can also be formed by depositing a metal film, such as depositing gold, platinum, copper, etc. with a thickness higher than 1*10 -6 Ohm's metal material.

[0036] In one embodiment, see Figure 2 and Figure 3 ,in, Figure 3 Another specific embodiment of the present application provides Figure 1a Schematic diagram of the disassembled structure shown; the heating element 91 can be plate-shaped and include a main body C and a tip D connected to one end of the main body C. The second connection end F of the heating element 91 is the tip D, and the first connection end E of the heating element 92 is the end of the main body C away from the tip D. The end of the second electrode 92b away from the second connection end F is disposed at the first connection end E of the heating element 92. Specifically, the main body C can be rectangular, and the tip D can be triangular, arc-shaped, or an isosceles trapezoid.

[0037] Specifically, the heating element 91 may be a long strip heating plate.

[0038] In one embodiment, see Figure 2, the first electrode 92a and the second electrode 92b are arranged on both sides of the heating plate opposite to each other; specifically, the first electrode 92a is coated on the first surface M of the heating plate and is electrically connected to the first connection end E of the heating plate, and the second surface N of the heating plate, which is opposite to the first surface M, is provided with an insulating layer 93, and the insulating layer 93 extends from the first connection end E of the heating plate to a position close to the second connection end F, and the heating element 91 is exposed to the second surface N of the second connection end F from the insulating layer 93; the second electrode 92b is specifically arranged on the surface of the insulating layer 93 away from the heating plate, and extends toward the second connection end F of the heating element 91, and a portion of the second electrode 92b extends outside the insulating layer 93 to contact and electrically connect with the second connection end F of the heating plate. It can be understood that the first electrode 92a can also be coated on the first surface M, the second surface N and the side of the heating plate, that is, to form a ring. Among them, the portion of the first electrode 92a coated on the second surface N of the heating plate is arranged between the insulating layer 93 and the heating plate.

[0039] Specifically, the first electrode 92a may be a rectangular structure, and the insulating layer 93 may be T-shaped; specifically, the second electrode 92b includes a first coating portion 921, a second coating portion 922, and a third coating portion 923; wherein, the first coating portion 921 is coated on the side surface of the insulating layer 93 away from the heating element 91 and is arranged opposite to the first electrode 92a, and the shape of the first coating portion 921 is the same as that of the first electrode 92a, the second coating portion 922 is connected to the first coating portion 921, coated on the side surface of the insulating layer 93 away from the heating element 91 and has the same shape as the extension portion of the insulating layer 93, the third coating portion 923 is connected to the second coating portion 922, directly coated on the second surface N of the heating element 91 and electrically connected to the second connection end F of the heating element 91, and the third coating portion 923 is perpendicular to the second coating portion 922, and it can be a long rectangular structure; specifically, the first coating portion 921, the second coating portion 922 and the third coating portion 923 form an I-shaped structure. It can be understood that the insulating layer 93 and the second electrode 92b are not limited to the above shapes and can be designed as needed; in a specific embodiment, the sizes of the first coating part 921, the second coating part 922, and the third coating part 923 are smaller than the sizes of the insulating layer 93 at the corresponding positions.

[0040] In one embodiment, at least one surface of the heating element 91 is further coated with a protective layer 94, which covers at least the first electrode 92a and the second electrode 92b to prevent the tobacco oil formed when heating the tobacco from damaging the first electrode 92a and the second electrode 92b; of course, the protective layer 94 can also cover the entire surface of the heating element 91 (see Figure 2 ), thereby protecting the first electrode 92a, the second electrode 92b and the heating element 91 while making the entire heating element 91 have a smooth surface. Specifically, the protective layer 94 can be a glass glaze layer.

[0041] In another specific embodiment, see Figure 3 , Figure 3 Another specific embodiment of the present application provides Figure 1a Schematic diagram of the disassembly of the structure shown; different from the first specific embodiment described above, the first electrode 92a and the second electrode 92b are arranged on the same side of the heating element 91. Specifically, the first electrode 92a is coated on the first surface M of the heating element 91 and is electrically connected to the first connection end E of the heating plate; specifically, the surface of the first electrode 92a away from the heating plate is provided with an insulating layer 93, the insulating layer 93 covers the first electrode 92a and extends from the first connection end E of the heating plate to a position close to the second connection end F, the second electrode 92b is specifically provided on the surface of the insulating layer 93 away from the first electrode 92a, and extends toward the second connection end F of the heating element 91, and a portion of the second electrode 92b extends outside the insulating layer 93 to contact and electrically connect with the second connection end F of the heating plate.

[0042] Specifically, the first electrode 92a may have a rectangular structure, and the insulating layer 93 may have a T-shape. Specifically, the portion of the insulating layer 93 covering the first electrode 92a has the same shape as the first electrode 92a, and is slightly larger than or the same size as the first electrode 92a. It will be appreciated that the shape and size of the portion of the insulating layer 93 covering the first electrode 92a are not limited, as long as the first electrode 92a can be insulated from the second electrode 92b. For example, the insulating layer 93 may cover the entire first electrode 92a, or the insulating layer 93 may cover a portion of the first electrode 92a but be larger than the second electrode 92b.

[0043] In a specific embodiment, a first electrode 92a may be further provided at a position opposite to the first electrode 92a on the second surface N of the heating element 91, and a second electrode 92b may be further provided at a position opposite to the second electrode 92b through the insulating layer 93, that is, the number of first electrodes 92a and second electrodes 92b are both two, so that the conductive components of the conductive ceramic can have a shorter current path close to the two surfaces of the conductive ceramic, so that the temperature field on the two surfaces of the heating element 91 is more uniform.

[0044] The heating element 90 provided in this embodiment is provided with a heating element 91, so that after the aerosol-forming matrix 98 is inserted, the heating element 91 heats the aerosol-forming matrix 98. Compared with the existing resistive heating circuits that are screen-printed or plated on the substrate, the heating element 91 can be directly and independently inserted into the aerosol-forming matrix 98, and the problem of the heating element 91 falling off from the substrate and causing failure when heated at high temperatures will not occur, which greatly improves the stability of the heating element 90. At the same time, by setting the heating element 91 in a plate shape, the aerosol-forming matrix 98 is effectively increased. The contact area with the heating element 91 is increased, thereby improving energy utilization and heating efficiency; in addition, by setting a first electrode 92a and a second electrode 92b insulated from the first electrode 92a, and setting the first electrode 92a at the first connection end E of the heating element 91 and electrically connecting it to the first connection end E, and electrically connecting one end of the second electrode 92b to the second connection end F, so that a current loop is formed between the first connection end E and the second connection end F of the heating element 91, not only can the short circuit problem be avoided, but the processing technology is also simpler, and the strength of the heating component 90 is higher.

[0045] Of course, in other embodiments, see Figure 4 and Figure 5 ,in, Figure 4 A cross-sectional view of heating elements provided in parallel according to an embodiment of the present application; Figure 5 This is a cross-sectional view of another embodiment of the present application, wherein heating elements are arranged in parallel. A heating assembly 90 includes at least two heating elements 91, and the at least two heating elements 90 are arranged in parallel. In one embodiment, there may be two heating elements 91, which are arranged opposite each other with an insulating layer 93 disposed therebetween.

[0046] In one embodiment, see Figure 4 , a first electrode 92a is provided on the opposite side surface of the two heating elements 91, and the first electrode 92a is provided at the first connection end E of the two heating elements 91; in this embodiment, the second electrode 92b is provided on the insulating layer 93, and extends from the first connection end E of the heating element 91 to a position close to the second connection end F, and is electrically connected to the second connection end F of the two heating elements 91 respectively, so that the two heating elements 91 form a current loop between the first electrode 92a and the second electrode 92b and are arranged in parallel.

[0047] In another specific embodiment, see Figure 5, the first electrode 92a is arranged at the position of the first connection end E of the corresponding heating element 91 of the insulating layer 93, and is electrically connected to the first connection end E of the two heating elements 91; and in this embodiment, the second connection ends F of the two heating elements 91 are respectively connected to their corresponding second electrodes 92b, so that the two heating elements 91 are arranged in parallel through the first electrode 92a and their respective corresponding second electrodes 92b; specifically, the opposite side surfaces of the two heating elements 91 are coated with an insulating layer 93, and the second electrode 92b on each heating element 91 is arranged on the side surface of the insulating layer 93 away from the heating element 91, and extends from the first connection end E of the heating element 91 to a position close to the second connection end F, so as to be connected to the second connection end F of the heating element 91.

[0048] In another embodiment, see Figure 6 , Figure 6 Schematic diagram of the structure of the heating component provided in the second embodiment of the present application; different from the above-mentioned first embodiment, the heating element 91 can be specifically cylindrical and includes a main body C and a tip portion D connected to one end of the main body C, the second connection end F of the heating element 91 is the tip portion D, and the first connection end E of the heating element 91 is the end of the main body C away from the tip portion D; in a specific embodiment, the main body C can be cylindrical, and the tip portion D can be conical or truncated cone; specifically, the heating element 91 can be as follows Figure 6 In the heating rod shown, the second connecting end F of the heating rod is a pointed end to facilitate insertion into tobacco.

[0049] For details, see Figure 7 , Figure 7 A specific embodiment of the present application provides Figure 6 Schematic diagram of the disassembly of the structure shown; the first electrode 92a is arranged on at least a portion of the surface of the first connecting end E of the heating rod; an insulating layer 93 is provided on the outer wall of the main body C of the heating rod, and the insulating layer 93 extends from the first connecting end E of the heating rod to a position close to the second connecting end F, and makes the main body C close to the tip D exposed to the insulating layer 93, and the second electrode 92b is arranged on the surface of the insulating layer 93 away from the heating rod, and a portion of the second electrode 92b extends outside the insulating layer 93 and is in contact with the second connecting end F of the heating rod, that is, a portion of the second electrode 92b extends outside the insulating layer 93 and is in contact with the second connecting end F of the main body C of the heating element 91 close to the tip D and exposed to the insulating layer 93.

[0050] Furthermore, in one embodiment, the first electrode 92a is disposed around the outer wall of the heating rod, and may be in an arc-shaped structure. In this embodiment, the insulating layer 93 is disposed around the circumferential direction of the heating rod, and a notch is provided at the insulating layer 93 corresponding to the position where the first electrode 92a is disposed on the heating rod, so that the first electrode 92a is at least partially exposed through the notch, thereby facilitating the connection of the electrode lead 95. In one embodiment, the portion of the second electrode 92b extending outside the insulating layer 93 may be disposed around the main body C of the heating rod, and may be in an annular structure, so as to maintain an effective connection between the second electrode 92b and the second connection end F of the heating rod. Of course, in other embodiments, the first electrode 92a may also include a bottom surface extending to the heating rod near the first connection end E to increase the overall bonding strength and electrical reliability.

[0051] In another specific embodiment, the first electrode 92a can also be arranged around the outer wall of the heating rod and have a ring structure. The insulating layer 93 can specifically completely cover the first electrode 92a and be arranged around the outer wall of the heating rod. This embodiment does not impose any restrictions on this, as long as the insulating layer 93 can prevent the first electrode 92a and the second electrode 92b from short-circuiting.

[0052] In one embodiment, at least one surface of the heating rod is coated with a protective layer 94, which covers at least the first electrode 92a and the second electrode 92b to prevent the tobacco oil formed when heating the tobacco from damaging the first electrode 92a and the second electrode 92b; of course, in other embodiments, see Figure 8 , Figure 8 This is a schematic diagram of a heating assembly with a protective layer coating the entire surface of a heating rod according to one embodiment of the present application. The protective layer 94 can also cover the entire surface of the heating rod, thereby protecting the first electrode 92a, the second electrode 92b, and the heating rod while providing a smooth surface. Specifically, the protective layer 94 can be a glass glaze layer.

[0053] In a specific embodiment, the resistance of the heating rod may be 0.3-1 ohm, for example, 0.6 ohm, and the resistivity may be 1*10 -4 Ohm-4*10 -4 Ohm, specifically 2*10 -4 Ohm, the power can be 2W-5W, specifically 3.5W. Figure 8 The total length L41 of the heating rod can be 18-20 mm, and the length L42 thereof for inserting into the tobacco can be specifically 14-15 mm. The diameter of the heating rod Specifically, it can be 2.0-3.0 mm, such as 3 mm.

[0054] It should be noted that, in the specific processing process, silver is first coated on the heating rod to form an electrode, then an insulating dielectric layer is coated on other positions on the surface of the heating rod, and then the electrode lead 95 is welded to prevent the electrode lead 95 from contacting the heating rod.

[0055] Specifically, by setting the heating element 91 in a columnar shape, it is not only convenient to insert the heating element 91 into the tobacco, but also the columnar heating element 91 is easy to process, which effectively reduces the processing difficulty coefficient.

[0056] The heating component 90 provided in the embodiment of the present application can directly adopt a self-supporting heating plate (or heating rod) made of conductive ceramic material for heating, and the heating element 91 can be arranged into a single or multiple series type or multiple parallel type according to the electrode control position and resistance value requirements; at the same time, the heating element 91 is made of ceramic material, and compared with the existing resistance heating circuit formed by coating metal heating material on the base, it can contact the tobacco on both sides at the same time and heat the tobacco, and the heating is more uniform and stable.

[0057] See also Figure 9 , Figure 9 This is a structural schematic diagram of an aerosol-forming device provided in one embodiment of the present application. In this embodiment, an aerosol-forming device 900 is provided, which includes a shell 901 and a heating component 90, a mounting seat 96 and a power supply component 97 arranged in the shell 901.

[0058] Among them, the heating component 90 can specifically be the heating component 90 provided in any of the above-mentioned embodiments. Its specific structure and function can be found in the above-mentioned relevant text description, which will not be repeated here; specifically, the heating component 90 is arranged on the mounting base 96 and is fixedly mounted on the inner wall surface of the shell 901 through the mounting base 96; the power supply component 97 is connected to the heating component 90 for supplying power to the heating component 90; and in one embodiment, the power supply component 97 can specifically be a rechargeable lithium-ion battery.

[0059] Specifically, the specific structure of the heating component 90 installed on the mounting base 96 can be seen in the above Figure 1a and Figure 8 For details, see Figure 8The mounting seat 96 includes a mounting body 961 and a mounting hole 962. The heating component 90 is specifically inserted into the mounting hole 962 of the mounting seat 96 to be fixed to the mounting seat 96; specifically, the second heating area B of the heating component 90 is inserted into the mounting hole 962 of the mounting seat 96 to be fixed to the mounting seat 96; and after the aerosol-forming matrix 98 is inserted, the bottom end of the aerosol-forming matrix 98 abuts against the upper surface of the mounting seat 96. Specifically, an avoidance groove is provided on the side wall of the mounting hole 962, and the electrode lead 95 specifically extends into the mounting seat 96 through the avoidance groove to be connected to the electrode on the heating element 91. Furthermore, at least two clamping parts 963 are also provided on the mounting body 961, and the mounting seat 96 is specifically fixed to the shell 901 of the aerosol-forming device 900 through the clamping parts 963.

[0060] For details, see Figure 10 , Figure 10 This is a front view of the mounting base and heating element after assembly provided by one embodiment of the present application; the heating element 91 is engaged in the mounting hole 962 of the mounting base 96; in a specific embodiment, the portion of the surface of the heating element 91 used for insertion into the mounting base 96 has a first fixing structure 964, and a second fixing structure 965 is provided at a position corresponding to the first fixing structure 964 in the mounting hole 962 of the mounting base 96. The mounting base 96 and the heating element 91 are fixed together by the first fixing structure 964 and the second fixing structure 965, thereby improving the stability of the connection between the two. The first fixing structure 964 can be specifically a plurality of protrusions (or depressions), and the second fixing structure 965 can be a depression (or protrusion) that matches the first fixing structure 964.

[0061] Further, see Figure 1a An extension groove 966 communicating with the mounting hole 962 may be further provided on one side of the mounting body 961. The extension groove 966 may be provided on a surface on a side facing away from the second connection end F of the heating element 91. The extension groove 966 may be configured to conform to the shape of the portion of the heating element 90 inserted into the mounting base 96. The extension groove 966 reinforces the portion of the heating element 90 inserted into the mounting base 96 to prevent breakage. In one embodiment, the mounting base 96 is provided with two extension grooves 966, which are arranged perpendicularly to each other.

[0062] Specifically, the material of the mounting seat 96 can be an organic or inorganic material with a melting point higher than 160 degrees, for example, it can be PEEK material; the mounting seat 96 can be specifically bonded and fixed to the heating component 90 by an adhesive, and the adhesive can be a high-temperature resistant glue.

[0063] The aerosol-forming device 900 provided in this embodiment is provided with a heating component 90, and the heating component 90 is provided to include a heating element 91, so that after the aerosol-forming matrix 98 is inserted, the aerosol-forming matrix 98 is heated by the heating element 91; compared with the existing resistive heating circuits silk-screened or plated on the substrate, the heating element 91 can be directly and independently inserted into the aerosol-forming matrix 98, and there will be no problem of the heating element 98 falling off from the substrate and causing failure when subjected to high-temperature heating, thereby greatly improving the stability of the heating component 90; at the same time, by providing a first electrode 92a and a second electrode 92b insulated from the first electrode 92a, and providing the first electrode 92a at the first connection end E of the heating element 91 and electrically connecting it to the first connection end E, and electrically connecting one end of the second electrode 92b to the second connection end F, so that a current loop is formed between the first connection end E and the second connection end F of the heating element 91, not only can the short circuit problem be avoided, but the process is relatively simple and the strength of the heating component 90 is relatively high.

[0064] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heating component, characterized in that: include: a heating element for inserting into and heating the aerosol-forming substrate, the heating element having a first connection end and a second connection end opposite the first connection end along the axial direction of the heating element; wherein, during the insertion of the heating element into the aerosol-forming substrate, the second connection end is inserted into the aerosol-forming substrate before the first connection end; A first electrode is provided at the first connection end of the heating element and is in direct contact and electrically connected to the first connection end; A second electrode, one end of the second electrode is in direct contact and electrically connected to the second connection end, the other end of the second electrode extends from the second connection end of the heating element to the first connection end of the heating element along the axial direction of the heating element, and the first electrode and the second electrode are insulated.

2. The heating component according to claim 1, characterized in that The heating element is plate-shaped and includes a main body and a tip connected to one end of the main body. The second connection end of the heating element is the tip, and the first connection end of the heating element is the end of the main body away from the tip; the end of the second electrode away from the second connection end is arranged at the first connection end of the heating element.

3. The heating component according to claim 2, characterized in that The first electrode is arranged on the first surface of the heating element; An insulating layer is provided on the second surface of the heating element, and the insulating layer extends from the first connection end of the heating element to a position close to the second connection end. The second surface of the heating element at the second connection end is exposed to the insulating layer. The second electrode is provided on the surface of the insulating layer away from the heating element, and a portion of the second electrode extends outside the insulating layer and is provided in contact with the second connection end of the heating element; wherein the first surface and the second surface are provided opposite to each other; and the heating element includes a first heating area and a second heating area.

4. The heating component according to claim 2, characterized in that The first electrode is arranged on the first surface of the heating element; An insulating layer is provided on the surface of the first electrode away from the heating element, and the insulating layer extends from the first connection end of the heating element to a position close to the second connection end. The second electrode is provided on the surface of the insulating layer away from the first electrode, and a portion of the second electrode extends outside the insulating layer and is provided in contact with the second connection end of the heating element. The heating element includes a first heating area and a second heating area.

5. The heating component according to claim 3 or 4, characterized in that: The first electrode has a rectangular structure, the second electrode has an I-shaped structure, and the insulating layer has a T-shaped structure.

6. The heating component according to claim 2, characterized in that: The main body is rectangular, and the tip is triangular, arc-shaped or isosceles trapezoidal.

7. The heating component according to claim 1, characterized in that The heating element is columnar and includes a main body and a tip connected to one end of the main body. The second connection end of the heating element is the tip, and the first connection end of the heating element is the end of the main body away from the tip.

8. The heating component according to claim 7, characterized in that: The first electrode is provided on at least a portion of the surface of the first connection end of the heating element; An insulating layer is provided on the outer wall of the main body of the heating element, and the insulating layer extends from the first connection end of the heating element to a position close to the second connection end and exposes the main body close to the tip end to the insulating layer. The second electrode is provided on the surface of the insulating layer away from the heating element, and a part of the second electrode extends outside the insulating layer and is in contact with the second connection end of the main body of the heating element close to the tip end, which is exposed to the insulating layer. The heating element includes a first heating area and a second heating area.

9. The heating component according to claim 8, characterized in that: The insulating layer is arranged around the outer wall of the heating element and has a notch corresponding to the position of the first electrode, so that the first electrode is at least partially exposed.

10. The heating component according to claim 8, characterized in that: The first electrode is disposed around the heating element, and the portion of the second electrode extending outside the insulating layer is disposed around the main body of the heating element.

11. The heating component according to claim 1, characterized in that: It also includes a protective layer coated on the surface of the heating element and covering the first electrode and the second electrode.

12. The heating component according to claim 11, characterized in that: The protective layer is a glass glaze layer and covers the entire surface of the heating element.

13. The heating component according to claim 7, characterized in that The main body is cylindrical, and the tip is conical or truncated cone.

14. The heating component according to claim 1, characterized in that The heating element includes a first heating area and a second heating area, and a ratio of a heating temperature of the first heating area to a heating temperature of the second heating area is greater than two.

15. The heating component according to claim 1, characterized in that The heating element is made of conductive ceramic.

16. The heating component according to claim 15, characterized in that: The heating element of the conductive ceramic 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, strontium lanthanum manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, and yttrium oxide.

17. An aerosol-forming device, characterized in that It comprises: 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 according to any one of claims 1-16.

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