Heating assembly and aerosol-generating device

Abstract

A heating assembly (100) and an aerosol-generating device (1000). The heating assembly (100) comprises an outer tube (20), a first electrode (110), a second electrode (110), and a temperature measurement component (80), wherein each of the first electrode (110) and the second electrode (110) is at least partially arranged in the outer tube (20), the first electrode (110) and the second electrode (110) are arranged opposite and spaced apart from each other, and when the first electrode (110) and the second electrode (110) are energized, a plasma is generated between the first electrode (110) and the second electrode (110); and the temperature measurement component (80) is connected to the outer tube (20), and the temperature measurement component (80) is configured to measure the temperature of the outer tube (20).

Description

Heating components and aerosol generating devices

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 202311160268.7 filed with the State Intellectual Property Office of China on September 8, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of aerosol generating devices, and in particular to a heating component and an aerosol generating device. Background Art

[0004] In related technologies, an aerosol-generating device includes an outer tube that can contact an aerosol-forming substrate. The aerosol-generating device can heat the aerosol-forming substrate using plasma heating to form an aerosol. Improving the aerosol heating effect has become a highly sought-after technical issue.

[0005] Summary of the Invention

[0006] The present application provides a heating component and an aerosol generating device.

[0007] The heating assembly of the present embodiment includes an outer tube, a first electrode, a second electrode, and a temperature measuring assembly. At least a portion of the first electrode and at least a portion of the second electrode are disposed within the outer tube, the first electrode and the second electrode being disposed opposite each other and spaced apart. When power is applied to the first electrode and the second electrode, plasma is generated between the first electrode and the second electrode. The temperature measuring assembly is connected to the outer tube and is used to detect the temperature of the outer tube.

[0008] The heating component of the embodiment of the present application detects the temperature of the outer tube through the temperature measuring component, so that the heating component can adjust the voltage applied to the first electrode and the second electrode according to the temperature of the outer tube, control the heating temperature of the heating component, and improve the heating effect of the heating component on the aerosol forming matrix. In addition, the installation process of the temperature measuring component is simple and efficient.

[0009] In some embodiments, the temperature measurement component includes a temperature sensing portion and a conductive portion connected to the temperature sensing portion, and the temperature sensing portion is disposed on the outer tube.

[0010] In some embodiments, the temperature sensing portion is disposed on the outer wall or the inner wall of the outer tube.

[0011] In some embodiments, the temperature sensing portion includes a temperature sensing film attached to the outer tube.

[0012] In some embodiments, the temperature sensitive film is at least partially extended along the circumference of the outer tube.

[0013] In some embodiments, the temperature sensitive film is in a closed ring shape, a ring shape with an opening, or a U shape.

[0014] In some embodiments, along the axial direction of the outer tube, the width of the temperature sensitive film ranges from 0.5 mm to 1.2 mm.

[0015] In some embodiments, the resistance of the temperature sensing portion is greater than the resistance of the conductive portion.

[0016] In some embodiments, the first electrode includes a discharge end surface facing the second electrode, and the temperature sensing portion is disposed on a side of the discharge end surface away from the second electrode.

[0017] In some embodiments, along the axial direction of the outer tube, a distance between the temperature sensing portion and the plane where the discharge end surface is located ranges from 0 mm to 2 mm.

[0018] In some embodiments, the temperature coefficient of the temperature sensitive film is greater than or equal to 300 ppm / °C.

[0019] In some embodiments, the heat-generating component includes a protective layer that wraps at least one of the temperature-sensing portion and the conductive portion.

[0020] In some embodiments, there are two conductive parts, and the two conductive parts are spaced apart along the circumference of the outer tube.

[0021] In some embodiments, the heating component includes an inner tube at least partially disposed within the outer tube, the first electrode is at least partially disposed within the inner tube, at least a portion of the second electrode is disposed at one end of the inner tube, and the first electrode and the second electrode are disposed opposite and spaced apart.

[0022] In some embodiments, the temperature sensing portion includes a temperature probe or a thermocouple.

[0023] The aerosol generating device according to the embodiment of the present application includes the heating component according to any one of the above embodiments.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] FIG1 is a schematic structural diagram of an aerosol generating device according to an embodiment of the present application;

[0027] FIG2 is a schematic structural diagram of a heating component according to an embodiment of the present application;

[0028] FIG3 is a schematic cross-sectional view of the heating component of FIG2 along the AA direction;

[0029] FIG4 is a schematic structural diagram of a heating component according to another embodiment of the present application;

[0030] FIG5 is a schematic structural diagram of a temperature measuring component in the heating component of FIG2 ;

[0031] FIG6 is a schematic structural diagram of a temperature measuring component in the heating component of FIG4 ;

[0032] FIG7 is a schematic structural diagram of a temperature measurement assembly according to another embodiment of the present application;

[0033] FIG8 is an enlarged structural diagram of part B of FIG3;

[0034] FIG9 is a schematic structural diagram of a temperature measurement assembly according to another embodiment of the present application;

[0035] FIG10 is a schematic diagram of the combination of the temperature measuring assembly and the base of FIG9;

[0036] FIG11 is a schematic diagram of a partial structure of a heating component according to an embodiment of the present application;

[0037] FIG12 is a schematic cross-sectional view of the heating component of FIG11 along the DD direction;

[0038] FIG13 is a schematic diagram of the exploded structure of the heating component of FIG11 of the present application;

[0039] FIG14 is a schematic cross-sectional view of the heating component of FIG11 along the BB direction;

[0040] FIG15 is a schematic diagram of a partial structure of a heating component according to an embodiment of the present application;

[0041] FIG16 is a schematic structural diagram of a conductive member according to an embodiment of the present application;

[0042] FIG17 is a schematic structural diagram of a conductive member according to another embodiment of the present application;

[0043] FIG18 is a schematic structural diagram of a conductive member according to yet another embodiment of the present application;

[0044] FIG19 is a schematic structural diagram of a conductive member according to yet another embodiment of the present application;

[0045] FIG20 is a schematic cross-sectional view of the heating component of FIG18 along the CC direction;

[0046] FIG21 is a partial enlarged schematic diagram of portion D of FIG20;

[0047] FIG22 is a schematic structural diagram of a conductive member according to yet another embodiment of the present application;

[0048] FIG23 is a schematic cross-sectional view of the heating component of FIG16 along the EE direction;

[0049] FIG24 is a schematic structural diagram of a heating component according to yet another embodiment of the present application;

[0050] FIG25 is a partial schematic diagram of a heating component according to another embodiment of the present application;

[0051] FIG26 is a schematic cross-sectional view of the heating component of FIG25 along the FF direction;

[0052] FIG27 is an enlarged partial cross-sectional view of the heating component of FIG26;

[0053] FIG28 is a partial enlarged schematic diagram of portion G of FIG26 ;

[0054] FIG29 is a schematic structural diagram of a heating component according to yet another embodiment of the present application;

[0055] FIG30 is a schematic cross-sectional view of the heating component of FIG29 along the HH direction;

[0056] FIG31 is a schematic diagram of the exploded structure of the heating component of FIG29.

[0057] Description of reference numerals:

[0058] Aerosol generating device 1000, power source 200, battery 210, transformer 220, aerosol-forming substrate 300, control center 400, cover 500;

[0059] Heating component 100, inner tube 10, outer peripheral surface 1001, first tube segment 101, second tube segment 102, first end surface 11, second end surface 12, central axis 1011, outer tube 20, tapered end 21, open end 22, opening 230, first electrode 110, discharge end surface 1104, discharge end 111, conductive end 112, wire 113, second electrode 120, mounting portion 121, protrusion 122, discharge region 130, conductive member 30, first end 31, second end 32, first conductive portion 301, second conductive portion 302, connecting wire 33, conductive wire 330, conductive strip 34, first conductive strip 341, second conductive strip 342, first conductive ring 310, second conductive ring 320, hollow portion 35, first hollow portion 351, second hollow portion 352, insulating part 40, first insulating part 41, second insulating part 42, through hole 421, connector 50, infrared radiation film 60, thermal insulation gap 1002, elastic part 70, temperature measuring component 80, temperature sensing part 81, conductive part 82, temperature measuring wire 83, temperature sensing film 84, protective layer 85, base 90, first bracket 91, second bracket 92, housing 93, wire outlet hole 903. DETAILED DESCRIPTION

[0060] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0063] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0064] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0065] Referring to FIG1 , the present application provides a heating component 100 and an aerosol generating device 1000. The heating component 100 is used in the aerosol generating device 1000 to heat an aerosol generating substrate 300 using plasma to form an aerosol. The aerosol generated in the aerosol generating device 1000 can be used for various purposes, including food, medicine, and industrial production.

[0066] 2 and 3 , the heating assembly 100 according to the embodiment of the present application includes an outer tube 20, a first electrode 110, a second electrode 120, and a temperature measuring assembly 80. The first electrode 110 and the second electrode 120 are at least partially disposed within the outer tube 20. The first electrode 110 and the second electrode 120 are at least partially opposed to each other and spaced apart. When power is applied between the first electrode 110 and the second electrode 120, plasma is generated between the first electrode 110 and the second electrode 120. The temperature measuring assembly 80 is connected to the outer tube 20 and is used to detect the temperature of the outer tube 20.

[0067] The heating component 100 of the embodiment of the present application detects the temperature of the outer tube 20 through the temperature measuring component 80, so that the heating component 100 can adjust the voltage applied to the first electrode 110 and the second electrode 120 according to the temperature of the outer tube 20, control the heating temperature of the heating component 100, and enhance the heating effect of the heating component 100 on the aerosol-forming matrix 300.

[0068] Plasma is a form of matter that contains a large number of charged particles and neutral atoms and molecules, and maintains overall electrical neutrality. Plasma can be generated by the ionization of gas under the action of an electric field. The plasma generation process can generate a large amount of heat. The maximum temperature of the plasma generated between the first electrode 110 and the second electrode 120 can reach 2000°C, and the temperature range in a stable state can be 1000°C to 1600°C. Therefore, the heating component 100 can use the plasma generation process and the high temperature of the plasma to heat the aerosol-forming matrix 300 to generate an aerosol.

[0069] Specifically, the outer tube 20 is a hollow tube that covers the first electrode 110 and the second electrode 120. The first electrode 110 and the second electrode 120 face each other within the outer tube 20 and are separated by a predetermined distance. The area between the first electrode 110 and the second electrode 120 and the spaced-apart area may serve as a discharge region 130, where the first electrode 110 and the second electrode 120 discharge and form plasma. The inner wall of the outer tube 20 covers the discharge region 130, while the outer wall of the outer tube 20 may directly contact the aerosol-forming substrate 300.

[0070] Referring to Figure 1 , the outer tube 20 can be partially inserted into the aerosol-forming substrate 300 along its axial direction. The end of the outer tube 20 inserted into the aerosol-forming substrate 300 can be closed and protrude outward to form a relatively sharp tapered end 21. The end of the outer tube 20 opposite the tapered end 21 along the axial direction has an opening 230. The end of the outer tube 20 having the opening 230 is an open end 22.

[0071] The first electrode 110 and the second electrode 120 can extend into the outer tube 20 through the opening 230. The second electrode 120 at least partially extends into the tapered end portion 21. The portion of the first electrode 110 extending into the outer tube 20 is further away from the tapered end portion 21 than the second electrode 120. The first electrode 110 can be cylindrical and substantially coaxial with the outer tube 20. One end of the first electrode 110 in the axial direction of the outer tube 20, which opposes at least a portion of the second electrode 120, serves as a discharge end 111. The other end of the first electrode 110 in the axial direction of the outer tube 20 can serve as a conductive end 112, which can be partially exposed outside the outer tube 20 through the opening 230.

[0072] It should be noted that the first electrode 110 and the second electrode 120 can be connected to either direct current or alternating current. When direct current is applied to the first electrode 110 and the second electrode 120, the first electrode 110 and the second electrode 120 use the direct current to form a plasma; when alternating current is applied to the first electrode 110 and the second electrode 120, the first electrode 110 and the second electrode 120 use the alternating current to form a plasma.

[0073] The outer tube 20 transfers heat from the discharge region 130 to the aerosol-forming substrate 300 via infrared radiation and heat transfer. Under the influence of the high temperature of the plasma in the discharge region 130, the outer tube 20 increases in temperature. Depending on the type of aerosol-forming substrate 300, maintaining a stable temperature of the outer tube 20 between 200°C and 350°C can achieve a good heating and atomization effect. However, prolonged temperatures exceeding 350°C can easily lead to gelatinization and carbonization of the aerosol-forming substrate 300.

[0074] The temperature measurement assembly 80 is connected to the outer tube 20 and can detect the temperature of the outer tube 20 in real time. Referring to Figure 1 , in some embodiments, the temperature measurement assembly 80 is connected to the control center 400 and transmits the detected temperature data of the outer tube 20 to the control center 400. When the temperature is too high or too low, the control center 400 adjusts the voltage or output power of the power supply 200 to control the voltage between the first electrode 110 and the second electrode 120, thereby adjusting the heating temperature.

[0075] 2 and 3 , in some embodiments, the temperature measuring assembly 80 includes a temperature sensing portion 81 and a conductive portion 82 connected to the temperature sensing portion 81 , and the temperature sensing portion 81 is disposed on the outer tube 20 .

[0076] In this way, the temperature sensing portion 81 is connected to the circuit via the conductive portion 82 , so that the temperature of the outer tube 20 can be obtained by detecting the resistance value of the temperature sensing portion 81 in the circuit.

[0077] Specifically, the temperature sensing portion 81 is the portion of the temperature measuring component 80 whose resistance value changes significantly with the temperature change of the outer tube 20. The temperature sensing portion 81 can be located between the two axial ends of the outer tube 20 and in direct contact with the outer tube 20. The portion of the outer tube 20 that contacts the temperature sensing portion 81 is the target area for the temperature measuring component 80 to detect the temperature. The conductive portion 82 can extend from the temperature sensing portion 81 along the axial direction of the outer tube 20 toward the open end 22, and the conductive portion 82 can be connected to the temperature measuring wire 83 from the open end 22, and connected to the circuit of the control center 400 through the temperature measuring wire 83. It should be noted that the conductive portion 82 and the temperature sensing portion 81 can be different parts of an integrally formed component, or can be two different components in contact and connected.

[0078] Conductive portion 82 can function as an electrode, electrically connecting to temperature sensing portion 81 and control center 400 to form a conductive loop. Conductive portion 82 can be connected to control center 400 via welding leads or conductive springs. Control center 400 can measure changes in the resistance of temperature sensing portion 81 by detecting changes in the voltage within the circuit, thereby calculating the temperature of the target area.

[0079] The direction from the tapered end 21 to the open end 22 along the axial direction of the outer tube 20 is from top to bottom. The lower end of the conductive portion 82 maintains a certain distance from the end surface of the open end 22, with the distance between the lower end of the conductive portion 82 and the end surface of the open end 22 ranging from 0.3 mm to 3 mm. This prevents the conductive portion 82 from contacting and conducting with the high-voltage electrode inside the outer tube 20, thereby preventing the discharge between the first electrode 110 and the second electrode 120 from generating plasma.

[0080] Referring to FIG. 2 and FIG. 4 , in some embodiments, the temperature sensing portion 81 is disposed on the outer wall or the inner wall of the outer tube 20 .

[0081] In this way, the temperature sensing portion 81 can effectively sense the temperature of the aerosol-forming substrate 300 heated by the outer tube 20 , thereby making the temperature control of the heating component 100 more precise.

[0082] Specifically, the temperature sensing portion 81 may be attached to the outer wall of the outer tube 20 and fixed relative to the outer tube 20. The portion of the outer tube 20 covered by the temperature sensing portion 81 may be inserted into the aerosol-forming substrate 300. The temperature sensing portion 81 may also be disposed within the outer tube 20, connected to the inner wall surface of the outer tube 20.

[0083] The outer tube 20 may be made of an insulating material that can transmit infrared radiation, for example, the outer tube 20 may be made of quartz, ceramic, quartz glass or the like.

[0084] In some embodiments, the wall thickness of the outer tube 20 ranges from 0.3 mm to 0.5 mm (inclusive). The outer diameter of the outer tube 20 is D, preferably 2.0 mm ≤ D ≤ 3.0 mm. For example, the wall thickness of the outer tube 20 can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc. The outer diameter of the outer tube 20 can be 2.0 mm, 2.1 mm, 2.3 mm, 2.6 mm, 2.8 mm, 3 mm, etc. The outer tube 20 can be a quartz tube with an outer diameter of 2.0 mm and a wall thickness of 0.3 mm. For another example, the outer tube 20 can be a quartz tube with an outer diameter of 3.0 mm and a wall thickness of 0.4 mm.

[0085] Referring to FIG. 4 to FIG. 7 , in some embodiments, the temperature sensing portion 81 includes a temperature sensing film 84 attached to the outer tube 20 .

[0086] In this way, the temperature-sensitive film 84 increases the contact area between the temperature-sensitive portion 81 and the outer tube 20 , so that the resistance value of the temperature-sensitive portion 81 changes more sensitively and accurately with the temperature of the outer tube 20 .

[0087] Specifically, the temperature-sensitive film 84 can be plated on the outer or inner wall of the outer tube 20 and formed into various patterns on the wall of the outer tube 20. For example, the temperature-sensitive film 84 can be in a circular ring shape, a straight strip shape, a fan shape, a wavy shape, etc. The temperature-sensitive film 84 is tightly attached to the outer wall of the outer tube 20, and the temperature of the outer tube 20 can be transferred to the temperature-sensitive film 84 through heat transfer. It can be understood that increasing the contact area between the temperature-sensitive film 84 and the outer tube 20 also increases the amount of heat absorbed by the temperature-sensitive film 84 from the outer tube 20 per unit volume, thereby improving the sensitivity of the temperature-sensitive film 84 to sensing the temperature of the outer tube 20.

[0088] The temperature sensing film 84 can be made of a resistive material with conductive properties, for example, the temperature sensing film 84 can be made of at least one of platinum, gold, silver, chromium, nickel, and alloy materials containing platinum, gold, silver, chromium, and nickel.

[0089] In some embodiments, the conductive portion 82 can be made of the same material as the temperature-sensitive film 84 and attached to the outer wall of the outer tube 20. The film layers of the conductive portion 82 and the temperature-sensitive portion 81 can be integrally plated, as shown in FIG6 . The conductive portion 82 can also be made of a different material from the temperature-sensitive film 84, becoming a separate component that is in contact and connected with the temperature-sensitive film 84. The conductive portion 82 can be in a variety of shapes or irregular patterns, such as a rectangle, a cone, a trapezoid, etc. For example, as shown in FIG7 , the width of the conductive portion 82 in the circumferential direction of the outer tube 20 gradually decreases in the direction approaching the temperature-sensitive portion 81, and the conductive portion 82 is roughly trapezoidal. The width of the end of the conductive portion 82 away from the temperature-sensitive film 84 is appropriately increased, and the conductive portion 82 is not prone to defects such as curling and cracking at high temperatures, making the connection between the temperature measuring component 80 and the outer tube 20 more stable.

[0090] Please refer to FIG. 2 and FIG. 4 again. In some embodiments, the temperature-sensitive film 84 is at least partially extended along the circumference of the outer tube 20 .

[0091] This is beneficial for the temperature-sensing film 84 to measure the average circumferential temperature of the outer tube 20 , thereby improving the temperature measurement accuracy.

[0092] Specifically, the temperature-sensitive film 84 can be plated on the outer tube 20 at a distance of 3 mm to 14 mm from the top of the tapered end 21 along the axial direction of the outer tube 20, and can fit the outer circumference of the outer tube 20 and tightly fit the outer wall of the outer tube 20. The upper end of the conductive portion 82 extends upward along the axial direction of the outer tube 20 to the lower edge of the temperature-sensitive film 84, and is in contact with and connected to the temperature-sensitive film 84. The temperature-sensitive film 84 extends 2 mm to 8 mm along the circumference of the outer tube 20. In other words, the circumference of the temperature-sensitive film 84 along the circumference of the outer tube 20 can range from 2 mm to 8 mm. The outer circumference of the outer tube 20 is greater than or equal to the circumference of the temperature-sensitive film 84. There can be two conductive portions 82, one connecting the two ends of the temperature-sensitive film 84 along the circumference of the outer tube 20. The conductive portion 82 can also be connected to the temperature-sensitive film 84 between the two ends of the temperature-sensitive film 84 along the circumference of the outer tube 20.

[0093] 5 and 6 , in some embodiments, the temperature-sensitive film 84 is in a closed ring shape, a ring shape with an opening, or a U-shape.

[0094] In this way, the temperature sensing film 84 is in a ring pattern, which can collect the average value of the circumferential temperature of the outer tube 20, thereby improving the temperature measurement accuracy.

[0095] In some embodiments, as shown in FIG5 , a temperature-sensitive film 84 is disposed around the circumference of the outer tube 20, forming a shield around the circumference of the outer tube 20. The temperature-sensitive film 84 is in the shape of a closed annular ring, and the circumference of the temperature-sensitive film 84 is equal to the outer circumference of the outer tube 20. Two conductive portions 82 connected to the temperature-sensitive film 84 may be provided. The two conductive portions 82 may be spaced apart in the circumferential direction of the outer tube 20 and extend downwardly along the axial direction of the outer tube 20. In this embodiment, the temperature-sensitive film 84 can be divided into left and right semicircles with the connection between the two conductive portions 82 and the temperature-sensitive film as the boundary. In the closed temperature measurement circuit formed by the conductive portion 82 and the temperature-sensitive film 84, the left and right semicircles of the temperature-sensitive film 84, which are divided by the conductive portion 82 as the boundary, are in parallel.

[0096] In some embodiments, as shown in FIG6 , a temperature-sensitive membrane 84 is disposed around the outer tube 20, forming an annular shape with an opening therein. The annular shape with an opening can be a semicircular ring, a two-thirds circular ring, a semi-elliptical ring, or the like. For example, the cross-sectional shape of the temperature-sensitive membrane 84 can be U-shaped or approximately U-shaped. The temperature-sensitive membrane 84 does not cover the outer tube 20 at the annular opening, and the circumference of the temperature-sensitive membrane 84 is smaller than the outer circumference of the outer tube 20. The conductive portion 82 and the temperature-sensitive membrane 84 form a single-line series temperature measurement circuit.

[0097] It should be noted that the present application does not limit the shape of the temperature-sensitive film 84 to a ring. The temperature-sensitive film 84 can be in a circular ring, an elliptical ring, a ring formed by connecting multiple arc segments, etc. The temperature-sensitive film 84 can also be in a variety of patterns such as strips or squares on the outer tube 20, or an irregular pattern composed of a combination of multiple shapes.

[0098] 3 and 8 , in some embodiments, along the axial direction of the outer tube 20 , the width f of the temperature-sensitive film 84 ranges from 0.5 mm to 1.2 mm (inclusive).

[0099] In this way, by reasonably setting the width of the temperature sensing film 84 , the resistance of the temperature sensing portion 81 and the area of ​​the temperature measurement target region can be adjusted, thereby improving the temperature measurement accuracy.

[0100] Specifically, the width of the temperature-sensitive film 84 in the axial direction of the outer tube 20 can be uniform. For example, the width f of the temperature-sensitive film 84 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.85 mm, 1.0 mm, 1.1 mm, or 1.2 mm. In some embodiments, the width of the temperature-sensitive film 84 in the axial direction of the outer tube 20 can also be uneven. For example, the width f of the temperature-sensitive film 84 can be 0.5 mm-1.2 mm, 0.6 mm-1.0 mm, 0.7 mm-0.9 mm, etc., and can vary between the two end points of the above width ranges.

[0101] In some embodiments, the resistance of the temperature sensing portion 81 is greater than the resistance of the conductive portion 82 .

[0102] In this way, the proportion of the resistance value of the temperature sensing portion 81 in the overall resistance value of the temperature measuring component 80 is increased, so that the temperature change of the temperature sensing portion 81 is more accurately reflected as the resistance change.

[0103] Specifically, in the conductive loop between the temperature-sensing portion 81 and the conductive portion 82, the resistance of the temperature-sensing portion 81 is large, and the electromotive force difference of the temperature-sensing portion 81 is also large. As previously described, the control center 400 obtains the resistance change of the temperature-sensing portion 81 by measuring the voltage. It can be understood that the resistance of the temperature-sensing portion 81 is greater than the resistance of the conductive portion 82, which can increase the voltage change of the temperature-sensing portion 81, thereby improving the accuracy of temperature measurement. In some embodiments, the ratio of the resistance of the temperature-sensing portion 81 to the resistance of the conductive portion 82 is greater than or equal to 2.

[0104] Based on factors influencing conductor resistance changes, the resistance of the temperature-sensing portion 81 can be made greater than the resistance of the conductive portion 82 by properly configuring the materials, length, width, and conductor cross-sectional area of ​​the temperature-sensing portion 81 and the conductive portion 82. For example, referring to FIG8 , both the temperature-sensing portion 81 and the conductive portion 82 are temperature-measuring films, with the temperature-sensing portion 81 being thinner than the conductive portion 82.

[0105] Referring to FIG. 3 , in some embodiments, the first electrode 110 includes a discharge end surface 1104 facing the second electrode 120 , and the temperature sensing portion 81 is disposed on a side of the discharge end surface 1104 away from the second electrode 120 .

[0106] In this way, the temperature of the side of the discharge end surface 1104 away from the second electrode 120 is lower than the center of the discharge area 130. While meeting the accuracy and delay requirements of temperature measurement, the temperature sensing part 81 can be kept at a lower temperature, thereby improving the heat resistance reliability of the temperature measurement component 80.

[0107] Specifically, the discharge end surface 1104 is the point on the first electrode 110 that is shortest from the second electrode 120. It faces the second electrode 120 and is spaced a predetermined distance apart. The discharge region 130 is located between the discharge end surface 1104 and the surface of the second electrode 120 facing the first electrode 110. The direction from the tapered end 21 to the open end 22 along the axial direction of the outer tube 20 is defined as the top-to-bottom direction. The second electrode 120 is located above the first electrode 110, defining the upper boundary of the discharge region 130, while the discharge end surface 1104 defines the lower boundary of the discharge region 130. High voltage is applied to the first and second electrodes 110, 120. Discharge generates plasma in the discharge region 130, i.e., the area above the discharge end surface 1104. This concentrates heat in the area below the second electrode 120 and above the discharge end surface 1104. The temperature sensing portion 81 is located below the discharge end surface 1104, i.e., on the side of the discharge end surface 1104 away from the second electrode 120, to prevent the temperature of the temperature sensing portion 81 from being too high.

[0108] Referring to FIG. 8 , in some embodiments, along the axial direction of the outer tube 20 , a distance i between the temperature sensing portion 81 and the plane where the discharge end surface 1104 is located ranges from 0 mm to 2 mm (inclusive).

[0109] In this way, the temperature sensing portion 81 is arranged on the outer tube section within 2 mm of the axial distance from the discharge end surface 1104. The temperature response of the temperature sensing portion 81 and the discharge area 130 are basically synchronized, with low delay and good temperature measurement accuracy.

[0110] Specifically, the temperature sensing portion 81 is located on a side of the discharge end surface 1104 away from the second electrode 120. Along the axial direction of the outer tube 20, the distance i between the temperature sensing portion 81 and the plane containing the discharge end surface 1104 is less than or equal to 2 mm. The distance i between the temperature sensing portion 81 and the plane containing the discharge end surface 1104 can be considered to be the distance between the upper edge of the temperature sensing portion 81 and the plane containing the vertex of the discharge end surface 1104, along the axial direction of the outer tube 20. For example, the distance i between the temperature sensing portion 81 and the plane containing the discharge end surface 1104 can be 0.1 mm, 0.4 mm, 0.65 mm, 0.9 mm, 1.15 mm, 1.3 mm, 1.5 mm, 1.8 mm, or 2 mm.

[0111] In some embodiments, the temperature sensing portion 81 may also be located on the side of the discharge end surface 1104 facing the second electrode 120 , and the distance between the temperature sensing portion 81 and the plane where the discharge end surface 1104 is located along the axial direction of the outer tube 20 is also less than or equal to 2 mm.

[0112] In some embodiments, the temperature coefficient of the temperature sensitive film 84 is greater than or equal to 300 ppm / °C.

[0113] Thus, by selecting the temperature-sensitive film 84 with a larger temperature coefficient, the temperature-sensitive portion 81 can be improved.

[0114] Specifically, the temperature coefficient of resistance (TCR) represents the relative change in resistance when the temperature changes by 1 degree, measured in ppm / °C (i.e., 10E(-6) / °C). The temperature coefficient of the temperature-sensing film 84 is greater than or equal to 300 ppm / °C. When the temperature changes by 1 degree, the change in resistance of the temperature-sensing film 84 is 300x10-6. The temperature-sensing film 84 exhibits a TCR characteristic, which can either have a positive correlation between resistance and temperature change, i.e., the resistance of the temperature-sensing film 84 increases with increasing temperature, or a negative correlation between resistance and temperature change, i.e., the resistance of the temperature-sensing film 84 decreases with increasing temperature. When the surface temperature of the outer tube 20 increases or changes, based on the TCR characteristic of the temperature-sensing film 84 in the temperature measurement circuit, the electronic components connected to the temperature measurement circuit will receive a related signal, which can detect the change in voltage across the temperature measurement circuit caused by the change in resistance, thereby calculating the surface temperature of the target area of ​​the outer tube 20 corresponding to the temperature-sensing film 84.

[0115] Referring to FIG. 9 and FIG. 10 , in some embodiments, the heating component 100 includes a protective layer 85 that wraps at least one of the temperature sensing portion 81 and the conductive portion 82 .

[0116] In this way, the protective layer 85 is wrapped around the outer layer of the temperature measuring component 80 , which can reduce the wear of the temperature measuring component 80 and protect the temperature sensing film 84 during the process of the temperature measuring component 80 being inserted into the aerosol-forming matrix 300 along with the outer tube 20 .

[0117] Specifically, the protective layer 85 can be provided on the outer surface of the temperature measuring component 80 and adhered to the outer wall of the outer tube 20. The protective layer 85 can surround the section of the outer tube 20 to which the temperature measuring component 80 is attached, forming a cylindrical shape, and wrapping and covering the temperature sensing film 84 and part of the conductive part 82. The material of the protective layer 85 can include SiO2 (silicon dioxide) with a low expansion coefficient, and other doped oxides, wherein the weight percentage of SiO2 can be greater than or equal to 95%. The protective layer 85 can be a glaze layer made by high-temperature sintering by methods such as dipping or screen printing. The thickness of the protective layer 85 can be approximately one-third of the wall thickness of the outer tube 20. The glaze layer can increase the mechanical strength and thermal stability of the outer tube 20 and the temperature measuring component 80, and the glaze layer has electrical insulation, the surface is not easily corroded by oil smoke, and is easy to clean.

[0118] Please refer to FIG. 5 and FIG. 6 . In some embodiments, there are two conductive portions 82 , and the two conductive portions 82 are spaced apart along the circumference of the outer tube 20 .

[0119] In this way, the temperature-sensitive film 84 and the conductive portion 82 form a temperature measurement loop of a specific shape and are distributed in a specific area, which is beneficial to improving the accuracy of the temperature measurement loop in representing the temperature of the specific area.

[0120] Specifically, one conductive portion 82 extends axially upward from the pin of the temperature measuring wire 83 at the lower end along the outer tube 20 to a position 3 mm to 14 mm away from the apex of the tapered end portion 21, and is connected to the temperature sensing film 84. The temperature sensing film 84 extends 2 mm to 8 mm along the circumference of the outer tube 20 in a single line or in parallel in two lines, connects to another conductive portion 82, and then extends axially downward along the outer tube 20 to another pin of the temperature measuring wire 83 at the lower end of the outer tube 20. The conductive portion 82 extends axially downward along the outer tube 20 to a position 0.3 mm to 3 mm away from the end face of the opening 230. The two conductive portions 82 can form a temperature measurement circuit with a ring-shaped parallel or U-shaped single-segment circuit with the temperature sensing film 84. The two conductive portions 82 are spaced apart on the outer circumferential surface of the outer tube 20, and the distance between the two conductive portions 82 along the circumference of the outer tube 20 can be 2 mm to 8 mm.

[0121] In some embodiments, the upper end of the conductive portion 82 may also extend above the discharge end surface 1104 .

[0122] The live parts of the temperature measurement assembly 80, including the conductive portion 82 and the temperature-sensing film 84, are positioned as far away as possible from the first electrode 110, the second electrode 120, and the conductive elements connecting the first electrode 110 / second electrode 120 and the power supply 200 to reduce high-voltage crosstalk. For example, the linear distance between the conductive portion 82 and the temperature-sensing wire 83 and the conductive member 30 and the connecting wire 33 connected to the second electrode 120 is greater than 0.5 mm.

[0123] The conductive portion 82 may be made of a metal material with high electrical conductivity, and specifically may include one or more of gold, silver, platinum, and copper.

[0124] Please refer to Figure 3 again. In some embodiments, the heating component 100 includes an inner tube 10 that is at least partially disposed within the outer tube 20, the first electrode 110 is at least partially disposed within the inner tube 10, and at least a portion of the second electrode 120 is disposed at one end of the inner tube 10. The first electrode 110 and the second electrode 120 are disposed opposite to each other and spaced apart.

[0125] In this way, the inner tube 10 can provide insulation protection for the first electrode 110 and the second electrode 120. The first and second electrodes 110, 120 can be installed and positioned within the inner tube 10, facilitating the coaxialization and miniaturization of the heating component 100. Specifically, the outer tube 20 is sleeved over the inner tube 10. The inner tube 10 is a through tube with openings at both ends along its axis, and the openings axially extend through the inner tube 10. The second electrode 120 can be disc-shaped and engage with one end of the inner tube 10, covering the opening at that end. The first electrode 110 can be cylindrical and extend into the inner tube 10 from the end away from the second electrode 120, so that a portion of the first electrode 110 is covered by the inner tube 10. The end of the first electrode 110 extending into the inner tube 10 faces the second electrode 120 and is spaced a certain distance from the second electrode 120. The discharge region 130 can be the area within the inner tube 10 where the first electrode 110 and the second electrode 120 face each other and are spaced apart.

[0126] The end of the inner tube 10 provided with the second electrode 120 can be inserted into the outer tube 20, so that the second electrode 120 can partially abut the tapered end 21. The end of the inner tube 10 remote from the second electrode 120 can extend from the open end 22 of the outer tube 20, and the first electrode 110 can be exposed from this end to the outside of the inner tube 10 and the outer tube 20. The end of the first electrode 110 extending outside the inner tube 10 can be electrically connected to the connector 50, which is connected to the wire 113 and is connected to the power source 200 through the wire 113.

[0127] In some embodiments, the temperature sensing portion 81 includes a temperature probe or a thermocouple. The temperature probe or the thermocouple can be used to detect the temperature of the outer tube or the inner tube.

[0128] In some embodiments, the thermocouple or temperature probe of the temperature sensing portion 81 is disposed in close contact with or close to the outer wall of the outer tube 20. In some embodiments, the thermocouple or temperature probe of the temperature sensing portion 81 is disposed between the inner wall of the outer tube 20 and the outer wall of the inner tube 10 and primarily contacts the inner wall of the outer tube.

[0129] Referring to Figures 11 to 13, in some embodiments, the heating component 100 includes a conductive member 30 connected to the second electrode 120, the conductive member 30 extends along the axial direction of the inner tube 10, and the conductive member 30 is spaced apart from the temperature measuring component 80.

[0130] In this way, the conductive member 30 can facilitate the second electrode 120 to be connected to high voltage electricity. The spacing between the conductive member 30 and the temperature measuring component 80 can enhance the insulation protection of the temperature measuring component 80 and avoid high voltage crosstalk.

[0131] In some embodiments, the conductive member 30 is connected to the second electrode 120 for electrical connection to the power source 200. The conductive member 30 extends axially from one end of the inner tube 10 to the other end of the inner tube 10. Along the axial direction of the inner tube 10, the portion of the inner tube 10 corresponding to the conductive member 30 faces the outer tube 20.

[0132] It should be noted that the pipe section corresponding to the inner tube 10 and the conductive member 30 can be the portion of the inner tube 10 between the two axial ends of the conductive member 30, and the axial lengths of the pipe section corresponding to the inner tube 10 and the conductive member 30 and the conductive member 30 can be roughly equal, and the ends can be roughly aligned. In addition, it can also be understood that in order to electrically connect the second electrode 120 to the power supply 200, it is necessary to connect it with the conductive member 30, but the second electrode 120 and the conductive member 30 are not necessarily two separate components. The two can be made of the same material or can be integrally formed into a whole. The portion opposite to the first electrode 110 is used as an electrode, and the remaining portion is used for electrical connection. In this application, the second electrode 120 and the conductive member 30 are described as two components, which cannot be used as a limitation of the whole and the split, but is for better description and explanation.

[0133] In the heating component 100 of the embodiment of the present application, the pipe section of the inner tube 10 corresponding to the conductive member 30 is partially exposed to the outer tube 20, which reduces the volume of the conductive member 30, thereby reducing the heat capacity of the conductive member 30, so that the conductive member 30 stores less heat, and allows the heat generated by the heating component 100 to be more directly radiated to the aerosol-forming matrix 300 through the inner tube 10 and the outer tube 20, thereby improving the heat utilization rate and further improving the heating rate and heating efficiency of the aerosol-forming matrix 300.

[0134] It can be understood that the section of the inner tube 10 corresponding to the conductive member 30 partially faces the outer tube 20, which means that the section of the inner tube 10 corresponding to the conductive member 30 has a portion of its outer wall facing the outer tube 20, and the portion of the outer wall and the outer tube 20 are not blocked by the conductive member 30. In the same section of the inner tube 10, another portion of its outer wall faces the outer tube 20, but this portion of the outer wall is blocked by the conductive member 30 and cannot directly face the outer tube.

[0135] Specifically, referring to Figure 13 , the inner tube 10 can be a hollow tube with open ends. The inner tube 10 can be cylindrical in shape, having a central axis 1011. The inner tube 10 is much longer in the axial direction than in the radial direction. The sides of the inner tube 10 circumscribe the central axis 1011, forming the inner tube 10 wall and the hollow space within the inner tube 10.

[0136] Referring to Figure 12 , at least a portion of first electrode 110 is inserted from one end of inner tube 10 along the axial direction of inner tube 10 into the hollow space at the center of inner tube 10. As shown in Figure 12 , the position where first electrode 110 emerges from inner tube 10 is designated P. Second electrode 120 is disposed at the other end of inner tube 10, extending through the hollow space of inner tube 10 and facing the portion of first electrode 110 inserted into inner tube 10.

[0137] A first electrode 110 is inserted into one end of the inner tube 10 and spaced a certain distance from the second electrode 120. For ease of explanation, the interval between the first electrode 110 and the second electrode 120 is referred to as the discharge region 130 in this application. The discharge region 130 can be enclosed by the inner tube 10 and is located in the hollow space of the inner tube 10.

[0138] Continuing to refer to Figure 12, in conjunction with Figure 1, the first electrode 110 can be connected to the power source 200, conducting one pole of the high voltage electricity; the second electrode 120 can be connected to the power source 200 via the conductive member 30, conducting the other pole of the high voltage electricity. The first electrode 110 and the second electrode 120 conduct the high voltage electricity, and the high voltage discharge in the discharge region 130 generates a plasma arc. At the center of the discharge region 130, the maximum temperature during the plasma arc generation can reach over 2000°C, and the stable plasma temperature range can be 1000°C to 1600°C. The discharge region 130 can be sealed and filled with an electrically neutral gas, such as nitrogen or argon. The discharge region 130 can also be open to atmospheric pressure, in which case the gas in the discharge region 130 is air.

[0139] Referring to Figures 11 and 12 , the outer tube 20 is disposed over the inner tube 10, enveloping at least a portion of the inner tube 10. The outer tube 20 can cover at least the discharge region 130 within the inner tube 10. The aerosol-forming substrate 300 fills the outer circumference of the outer tube 20. The outer surface of the outer tube 20 can be in direct contact with the aerosol-forming substrate 300. Heat generated by the plasma arc in the discharge region 130 can be transferred to the outer side of the outer tube 20 via the inner tube 10, the conductive member 30, and the outer tube 20 in the form of infrared radiation and heat transfer. The heat is then absorbed by the aerosol-forming substrate 300, forming an aerosol.

[0140] The inner tube 10 encloses at least a portion of the first electrode 110. The end of the inner tube 10, including the second end surface 12, is inserted into the outer tube 20 from the open end 22, such that the second electrode 120 disposed on the second end surface 12 abuts against the inner wall of the tapered end 21. The second end 32 is connected to the second electrode 120 and extends into the outer tube 20 along with the inner tube 10, proximate to the tapered end 21. The first end 31 can extend from the open end 22 to the outside of the outer tube 20.

[0141] The conductive member 30 can be disposed on the inner tube 10, extending from one end of the inner tube 10 along the axial direction of the inner tube 10 to the other end of the inner tube 10. The path along which the conductive member 30 extends between the ends of the inner tube 10 can be straight or curved. The outer wall of the portion of the inner tube 10 enclosed by the outer tube 20 faces the inner wall of the outer tube 20.

[0142] The conductive member 30 can be attached to the outer wall of the inner tube 10, positioned between the outer wall of the inner tube 10 and the inner wall of the outer tube 20, and cover a portion of the outer circumference of the inner tube 10. The portion of the inner tube 10 covered by the conductive member 30 cannot face or directly face the outer tube 20. In the area where the conductive member 30 blocks the inner tube 10, heat from the plasma arc can be transferred to the aerosol-forming substrate 300 through the inner tube 10, the conductive member 30, and the outer tube 20. The infrared radiation energy in this area is much less than that in the area not blocked by the conductive member 30.

[0143] It is understood that the conductive member 30 can be a metal member disposed on the outer wall of the inner tube 10. In other embodiments, the conductive member 30 can also be a conductive film or conductive circuit coated on the outer wall of the inner tube 10, and its shape, thickness, and arrangement position on the inner tube 10 can be understood in the same way as the above embodiment.

[0144] The pipe section corresponding to the inner pipe 10 and the conductive member 30 has at least a portion of its outer wall directly facing the inner wall of the outer pipe 20. In other words, there is no other obstruction between the portion of its outer wall and the inner wall of the outer pipe 20 corresponding to the conductive member 30.

[0145] Please refer to Figures 12 to 14 again. In some embodiments, the conductive member 30 includes a first end 31 and a second end 32 connected to the first end 31. The second end 32 is connected to the second electrode 120, and the first end 31 is used to electrically connect to the power supply 200.

[0146] The conductive member 30 can be arranged axially along the inner tube 10 between a first end 31 and a second end 32. The first end 31 is the end of the conductive member 30 extending from the outer tube 20 and is closest to the position where the first electrode 110 is exposed from the inner tube 10 in the axial direction of the inner tube 10. The second end 32 of the conductive member 30 can surround the second electrode 120 or otherwise contact the second electrode 120. It is disposed at one end of the inner tube 10 and is electrically connected to the second electrode 120.

[0147] Along the axial direction of the inner tube 10 , the direction from the second end 32 to the first end 31 may be from top to bottom. The section of the inner tube 10 corresponding to the conductive member 30 may be the section between the first end 31 and the second end 32 .

[0148] For example, the second end portion 32 may be cylindrical, coaxial with the inner tube 10 , and surround one end of the inner tube 10 . The section of the inner tube 10 that is wrapped by the second end portion 32 cannot face the outer tube 20 .

[0149] Referring to Figures 12, 13 and 14, in some embodiments, the tube section of the inner tube 10 corresponding to the conductive member 30 has an outer circumferential surface 1001, and the area of ​​the outer circumferential surface 1001 opposite to the conductive member 30 is smaller than the total area of ​​the outer circumferential surface 1001.

[0150] In this way, the area relative to the outer peripheral surface 1001 and the conductive member 30 is smaller than the total area of ​​the outer peripheral surface 1001, so that the tube sections corresponding to the inner tube 10 and the conductive member 30 are at least partially not blocked by the conductive member 30 and directly face the outer tube 30, so that the heat of the plasma in the inner tube 10 can be directly transferred to the aerosol-forming matrix 300 through the inner tube 10 and the outer tube 20 in some tube sections.

[0151] Specifically, the inner tube 10 includes a first end face 11 and a second end face 12 opposite the first end face 11. The first electrode 110 is exposed from the inner tube 10 at the first end face 11, and the second end face 12 abuts against a side surface of the second electrode 120. The entire section of the inner tube 10 can be located between the first end face 11 and the second end face 12. The second end 32 is disposed at the second end face, and the first end 31 can be located between the first end face 11 and the second end face 12. The section of the inner tube 10 corresponding to the conductive member 30 is the portion between the second end 32 and the first end 31.

[0152] The outer circumferential surface 1001 of the corresponding tube section of the inner tube 10 and the conductive member 30 extends along the axial direction of the inner tube 10 from the second end face 12 toward the first end face, to the location of the first end 31. It is understood that the area of ​​the outer circumferential surface 1001 of the corresponding tube section of the inner tube 10 and the conductive member 30 can be the product of the outer side length of the second end face 12 and the distance between the first end 32 and the second end 31 in the axial direction of the inner tube 10.

[0153] The conductive member 30 can be attached to the inner tube 10. For example, the conductive member 30 can be formed on the inner tube 10 by coating, with at least a portion of the outer circumferential surface 1001 of the inner tube 10 facing the conductive member 30. The outer circumferential surface 1001 of the inner tube 10 facing the conductive member 30 is shielded by the conductive member 30 between the inner tube 10 and the outer tube 20 in the radial direction of the inner tube 10. The area of ​​the outer circumferential surface 1001 facing the conductive member 30 is the area of ​​the inner tube 10 shielded by the conductive member 30 between the inner tube 10 and the outer tube 20.

[0154] Please continue to refer to FIG. 12 , FIG. 13 and FIG. 14 . In some embodiments, the tube section of the inner tube 10 corresponding to the conductive member 30 has an outer circumferential surface 1001 , and the conductive member 30 partially covers the outer circumferential surface 1001 .

[0155] Specifically, the conductive member 30 is in close contact with the outer wall of the inner tube 10. The outer circumferential surface 1001 of the inner tube 10 section corresponding to the conductive member 30 is partially covered by the conductive member 30. The conductive member 30 may extend along the outer circumferential surface 1001 of the inner tube 10 in the axial direction of the inner tube 10, extending from the first end face 11 to the second end face 12 and forming a straight extension path. The extension path of the conductive member 30 on the outer circumferential surface 1001 of the inner tube 10 may also be a curve that protrudes toward the outer tube 20 around the central axis 1011 of the inner tube 10. The extension path of the conductive member 30 covers a portion of the outer circumferential surface 1001 of the inner tube 10.

[0156] Referring to Figures 11 and 14 , in some embodiments, the inner tube 10 includes a first tube segment 101 and a second tube segment 102 connected to the first tube segment 101. A first electrode 110 is at least partially inserted into the first tube segment 101. A second electrode 120 is disposed at an end of the second tube segment 102 distal from the first tube segment 101, opposite and spaced from the first electrode 110. A plasma is controlled to be generated between the second electrode 120 and the first electrode 110 within at least the second tube segment 102, with the outer circumference of the first tube segment 101 partially facing the outer tube 20.

[0157] It should be noted that in this application, the inner tube 10 is divided into a first tube section 101 and a second tube section 102, which does not limit the inner tube 10 to be composed of two separate components. Preferably, the inner tube 10 is an integral tube, an integrally formed tube body. This is only for a better explanation of the subsequent solutions and does not constitute a limitation on whether the inner tube 10 is integral or split.

[0158] Specifically, the first tube segment 101 may be a portion of the tube segment along the axial direction of the inner tube 10, extending from the first end portion 31 to the end of the first electrode 110 facing the second electrode 120. The second tube segment 102 may be a portion of the tube segment along the axial direction of the inner tube 10, extending from the end of the first electrode 110 facing the second electrode 120 to the second end surface 11.

[0159] The second electrode 120 is disposed at one end of the second tube segment 102 including the second end surface 12 . Plasma is generated in the second tube segment 102 under control between the second electrode 120 and the first electrode 110 , so the discharge region 130 is located in the second tube segment 102 .

[0160] The conductive member 30 is connected to the second electrode 120 in the second tube segment 102 and extends from the second tube segment 102 toward the first tube segment 101, extending from the open end 22 to the exterior of the outer tube 20. The path of the conductive member 30 extending from the second tube segment 102 toward the first end face 11 covers a portion of the outer circumference of the first tube segment 101. The outer circumference of the first tube segment 101 not covered by the conductive member 30 faces the outer tube 20.

[0161] Referring to FIG. 13 and FIG. 15 , in some embodiments, the conductive member 30 is provided with a hollow portion 35 , and a portion of the first tube segment 101 is exposed through the hollow portion 35 and faces the outer tube 20 .

[0162] 11 , the upper portion of the heating element 100 is inserted into the aerosol-forming substrate 300. The upper portion of the heating element 100 includes a discharge region 130. The lower portion of the heating element 100 can be used for mounting and fixing. In related art, heat generated in the discharge region is easily transferred to the lower portion of the heating element through conductive elements, resulting in excessively high temperatures in the lower portion of the heating element, significant energy waste, and the accumulation of oil.

[0163] Thus, by providing the hollow portion 35 on the conductive member 30, the heat of the conductive member 30 is prevented from being transferred from the discharge region 130 to the lower portion of the heating component 100. This prevents the lower portion of the heating component 100 from overheating, improves the heat utilization efficiency of the heated aerosol-forming matrix 300, and reduces the deposition of solidified matter. The hollow portion 35 also helps to increase the intensity of the plasma arc's external radiation.

[0164] Referring to Figures 11 and 14 , the heating assembly 100 generates a plasma arc through discharge between the first electrode 110 and the second electrode 120 to heat the aerosol-forming substrate 300. At the center of the discharge region 130, the plasma arc can reach a maximum temperature of 2000°C, resulting in a relatively concentrated heat supply. It is understood that the heat capacity of the heating assembly 100 should be minimized to prevent heat accumulation in the discharge region 130 and to ensure rapid heat transfer to the aerosol-forming substrate 300. Furthermore, the heating assembly 100 should minimize heat transfer to locations outside the aerosol-forming substrate 300.

[0165] Referring to Figures 11 and 15 , in some embodiments, the conductive member 30 is tubular and sleeved outside the inner tube 10. The first end 31 and the second end 32 are the axial ends of the conductive member 30. The first end 31 surrounds the outer circumference of the first end surface 11, while the second end 32 extends from the open end 22 and is partially located outside the outer tube 20. A hollow portion 35 is located between the first end 31 and the second end 32. The outer surface of the inner tube 10 between the first end 31 and the second end 32 faces the outer tube 20 through the hollow portion 35.

[0166] Referring to Figures 14 and 15 , in some embodiments, the conductive member 30 is sheathed around the inner tube 10 and can be cylindrical in shape within the second tube segment 102, enclosing at least a portion of the second tube segment 102. The discharge region 130 is located within the second tube segment 102. Heat from the discharge region 130 can be transferred to the aerosol-forming substrate 300 via the second tube segment 102, the conductive member 30, and the outer tube 20. A hollow portion 35 extends from the end surface of the first electrode 110 facing the second electrode 120 to the second end portion 32. The outer circumference of the first tube segment 101 faces the inner wall of the outer tube 20 through the hollow portion 35. Heat generated in the discharge region 130 is difficult to transfer downward through the hollow portion 35.

[0167] Specifically, the conductive member 30 may be a metal tube coaxial with the inner tube 10 , so that the center of the discharge region 130 is approximately located on the central axis 1011 of the conductive member 30 and the inner tube 10 , and heat conduction is uniform.

[0168] The first end 31 and the second end 32 are connected by a conductive strip 34. The conductive strip 34 is attached to the outer wall surface of the inner tube 10 and extends axially along the inner tube 10. The first end 31 and the second end 32 can be annular, surrounding the central axis 1011 of the inner tube 10 and covering the outer wall of the inner tube 10.

[0169] Referring to Figure 16 , in some embodiments, the conductive member 30 may be a wire having a lower rigidity than the metal tube. The conductive member 30 may be wound around the inner tube 10 to form a tubular shape, covering the first tube segment 101 and the second tube segment 102. The wires are arranged with a certain spacing between them, forming a hollow portion.

[0170] In some embodiments, the shape of the hollow portion 35 includes but is not limited to a circular hole, an elliptical hole, an irregular hole, a straight-edge strip, a curved-edge strip, etc. The hollow portions 35 on a conductive member 30 can be of the same shape or different shapes.

[0171] 17 , in some embodiments, there are multiple hollow portions 35 , which are arranged at intervals along the circumference of the inner tube 10 .

[0172] In this way, the plurality of hollow portions 35 can further reduce the volume of the conductive member 30 , lower the heat capacity, and accelerate the heating speed of the aerosol-forming substrate 300 .

[0173] Specifically, the conductive member 30 may form a hollow portion 35 between the first end portion 31 and the second end portion 32. The hollow portions 35 are formed by a plurality of conductive strips 34. The plurality of conductive strips 34 may be distributed along the circumference of the inner tube 10 on the outer circumferential surface 1001 of the inner tube 10 at intervals.

[0174] 17 and 18 , in some embodiments, the conductive strips 34 and the hollow portions 35 are arranged side by side on the outer circumference of the first tube segment 101 , extend axially along the first tube segment 101 , and are spaced apart circumferentially along the first tube segment 101 .

[0175] In some embodiments, referring to FIG. 14 and FIG. 15 , the hollow portion 35 may extend from the first end portion 31 to the second end portion 32 along the axial direction of the inner tube 10 , so that the area of ​​the outer peripheral surface 1001 facing the outer tube 20 is relatively larger.

[0176] In some embodiments, the wall thickness of the conductive member 30 is in the range of 0.05 mm to 0.2 mm, thereby reducing the heat capacity and improving the energy efficiency of heat generation.

[0177] For example, the wall thickness of the conductive member 30 may range from 0.05 mm to 0.19 mm, 0.06 mm to 0.18 mm, 0.07 mm to 0.17 mm, 0.08 mm to 0.16 mm, 0.09 mm to 0.15 mm, 0.10 mm to 0.14 mm, 0.11 mm to 0.13 mm, 0.115 mm to 0.125 mm, etc. For example, the wall thickness of the conductive member 30 may range from 0.05 mm, 0.08 mm, 0.10 mm, 0.12 mm, 0.15 mm, 0.16 mm, 0.2 mm, etc.

[0178] Furthermore, the wall thickness of the conductive member 30 is preferably 0.05 mm to 0.1 mm. For example, the wall thickness of the conductive member 30 ranges from 0.055 mm, 0.06 mm, 0.07 mm, and 0.09 mm.

[0179] It will be appreciated that as the wall thickness of the conductive member 30 increases, its volume correspondingly increases, and the amount of heat it can absorb and store also increases, thereby increasing the heat capacity of the heating component 100. A conductive member 30 with a wall thickness of less than or equal to 0.2 mm is less likely to store heat, thereby facilitating the conductive member 30 to transfer heat from the discharge region 130 to the aerosol-forming substrate 300. A conductive member 30 with a wall thickness of greater than or equal to 0.05 mm is less likely to wear out and fail.

[0180] In some embodiments, the conductive member 30 is made of an oxidation-resistant metal material to prevent oxidation failure of the conductive member 30 and increase its service life. Specifically, the conductive member 30 is made of at least one of a nickel-based alloy and an iron-based alloy.

[0181] Please refer to Figures 17 and 18. In some embodiments, the conductive member 30 includes a first conductive portion 301 corresponding to the first tube segment 101. The first conductive portion 301 is provided with a first hollow portion 351. Part of the first tube segment 101 is exposed through the first hollow portion 351 and faces the outer tube 20. The hollow portion 35 includes the first hollow portion 351.

[0182] 11 , the first hollow portion 351 cuts off a path for heat transfer from part of the first conductive portion 301 to a region away from the aerosol-forming substrate 300 , thereby reducing heat waste.

[0183] Specifically, the first hollow portion 351 can be formed by cutting on the tube wall of the first conductive portion 301. The first hollow portion 351 can be in a strip shape. The number of the first hollow portions 351 can be one or more.

[0184] For example, referring to FIG19 , in some embodiments, the number of conductive strips 34 in the first tube segment 101 is one. Each conductive strip forms a hollow portion. The hollow portion extends from one side of the conductive strip 34 to the other side of the conductive strip 34 along the circumference of the first tube segment 101.

[0185] For another example, referring to Figures 12 and 18 , in some embodiments, the first tube segment 101 includes two conductive strips 34 . These two conductive strips 34 can be located at opposite ends of the same diameter of the inner tube 10 , separated by two hollow portions 35 . The outer wall of the inner tube 10 faces the inner wall of the outer tube 20 through the hollow portions 35 .

[0186] Referring again to FIG. 18 , in some embodiments, the first conductive portion 301 includes a plurality of first conductive strips 341 . The plurality of first conductive strips 341 extend axially along the first tube segment 101 and are spaced apart circumferentially around the first tube segment 101. A first hollow portion 351 is formed between two adjacent first conductive strips 341 .

[0187] In this way, the plurality of first conductive strips 341 can be spaced apart to form a plurality of first hollow portions 351 , thereby reducing downward heat transfer from the first conductive portion 301 .

[0188] Specifically, the plurality of first conductive strips 341 can extend from the first end portion 31 to the end surface opposite the first electrode 110 and the second electrode 120. The areas of the outer circumference of the first tube segment 101 covered by each of the plurality of first conductive strips 341 can be the same or different. The plurality of first conductive strips 341 are arranged at equal intervals along the circumference of the first tube segment 101, forming hollow portions 35 of equal size. The spacing between adjacent first conductive strips 341 can also be unequal.

[0189] The total area of ​​the outer circumference of the first tube segment 101 covered by the plurality of first conductive strips 341 is smaller than the total area of ​​the outer circumference of the first tube segment 101 facing the outer tube through the first hollow portion 351 .

[0190] Referring to FIG. 17 to FIG. 20 , in some embodiments, the conductive member 30 includes a second conductive portion 302 connected to the first conductive portion 301 , and the second conductive portion 302 covers at least a portion of the second tube segment 102 .

[0191] In this way, the plasma arc generated in the second pipe section 102 can be covered by the second conductive portion 302, thereby improving the utilization rate of heat radiation.

[0192] Specifically, the second conductive portion 302 is connected to the second electrode 120 at the second end surface 12 and extends from the second electrode 120 to the first tube segment 101. The second conductive portion 302 wraps around the second tube segment 102 and completely covers the outer circumference of the second tube segment 102.

[0193] In some embodiments, the second conductive portion 302 is cylindrical and coaxial with the second tube segment 102 .

[0194] As previously described, discharge region 130 is formed between the end of first electrode 110 extending into inner tube 10 and second electrode 120. High voltage is conducted between first electrode 110 and second electrode 120 to generate a plasma arc in discharge region 130. In the following description, L will be used to indicate the arc length of the plasma arc generated by first electrode 110 and second electrode 120, i.e., the arc length of the discharge.

[0195] It can be understood that the arc length is approximately equal to the distance between the first electrode 110 and the second electrode 120 in the axial direction of the inner tube 10. The distance between the first electrode 110 and the second electrode 120 in the axial direction of the inner tube 10 can be fixed, so the arc length can be a fixed value.

[0196] Referring to FIG. 20 , in some embodiments, the discharge arc length between the second electrode 120 and the first electrode 110 is 2 mm≤L≤10 mm.

[0197] In this way, the discharge arc length is within a controlled range, so that the discharge effect of the first electrode 110 and the second electrode 120 and the temperature field distribution in the discharge arc length region are better.

[0198] Specifically, the discharge arc length between the second electrode 120 and the first electrode 110 can be any length not less than 2 mm and not greater than 10 mm. For example, the discharge arc length can range from 3 mm to 10 mm, 4 mm to 8 mm, 5 mm to 7 mm, 5.5 mm to 6 mm, etc. Exemplarily, the discharge arc length can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 9 mm, 10 mm, etc. The discharge region 130 is located within the inner tube 10, and the length of the inner tube 10 is significantly greater than the discharge arc length. The outer tube 20 is sleeved over the inner tube 10, covering the entire discharge region 130. The outer tube 20 is inserted into the aerosol-forming substrate 300, and the outer tube 20 inserted into the aerosol-forming substrate 300 includes at least the tube end portion covering the discharge region 130.

[0199] In some embodiments, the discharge arc length between the second electrode 120 and the first electrode 110 is 6 mm < L ≤ 10 mm.

[0200] Exemplarily, the discharge arc length ranges from 6 mm to 9 mm, 7 mm to 8.5 mm, 7.5 mm to 8 mm, etc. For example, the discharge arc length may be 6.1 mm, 7.5 mm, 8.6 mm, 9.8 mm, 10 mm, etc.

[0201] In some embodiments, the discharge arc length L between the second electrode 120 and the first electrode 110 is 8 mm.

[0202] The second conductive portion 302 covers the second tube segment 102 , and its axially extending length is greater than the discharge arc length L, so that the length of the plasma arc does not exceed the second conductive portion 302 .

[0203] 20 and 21 , in some embodiments, along the axial direction of the inner tube 10, the second conductive portion 302 overlaps with the end portion of the first electrode 110 facing the second electrode 120. In the following description, n will be used to indicate the overlap dimension of the second conductive portion 302 and the end portion of the first electrode 110 facing the second electrode 120.

[0204] In this way, the risk of discharge between the second conductive portion 302 and the end of the first electrode 110 facing the second electrode 120 can be reduced.

[0205] It should be noted that, if the direction from the second end face to the first end face along the axial direction of the inner tube 10 is defined as the top-to-bottom direction, then the end of the first electrode 110 facing the second electrode 120 is the upper end of the first electrode 110, and the second conductive portion 302 is located above the first electrode 110 in the axial direction of the inner tube. The fact that the second conductive portion 302 overlaps with the end of the first electrode 110 facing the second electrode 120 along the axial direction of the inner tube 10 can be understood as meaning that the lower end of the second conductive portion 302 is located lower than the upper end of the first electrode 110 in the axial direction of the inner tube 10.

[0206] As can be understood, referring to FIG1 , the second electrode 120 is connected to the power source 200 via the conductive member 30. When the first electrode 110 and the second electrode 120 are electrically connected, the second electrode 120 faces the first electrode 110 and has opposite polarity, thereby generating an electric field between the second electrode 120 and the first electrode 110. The second electrode 120 and the second conductive portion 302 have the same polarity, and when the second conductive portion 302 is separated by a certain non-insulated distance from the end of the first electrode facing 120, discharge is possible.

[0207] The second conductive portion 302 is arranged to cover the end face of the first electrode 110 facing the second electrode 120 in the axial direction of the inner tube 10. The second conductive portion 302 overlaps the end face of the first electrode 110 facing the second electrode 120, so that the space between the second conductive portion 302 and the end face of the first electrode 110 facing the second electrode 120 is filled by the side wall of the inner tube 10, thereby enhancing insulation.

[0208] 20 and 21 , in some embodiments, along the axial direction of the inner tube 10 , an overlapping dimension n between the second conductive portion 302 and the end of the first electrode 110 facing the second electrode 120 is ≥0.3 mm.

[0209] In this way, the end surface of the second conductive portion 302 is not opposite to the end surface of the first electrode 110, making it difficult for the second conductive portion 302 to generate discharge with the first electrode 110, thereby enhancing the insulation strength between the second conductive portion 302 and the end of the first electrode 110 facing the second electrode 120.

[0210] Specifically, the overlapping dimension between the second conductive portion 302 and the end of the first electrode 110 facing the second electrode 120 can be the distance between the second conductive portion 302 at its farthest point from the second end face 12 in the axial direction of the inner tube 10 and the projection of the end face of the first electrode 110 facing the second electrode 120 on the outer wall of the inner tube 10.

[0211] The overlap dimension n between the second conductive portion 302 and the end portion of the first electrode 110 facing the second electrode 120 may range from 0.3 mm to 0.4 mm, 0.4 mm to 0.5 mm, 0.5 mm to 0.6 mm, etc. For example, the overlap dimension n between the second conductive portion 302 and the end portion of the first electrode 110 facing the second electrode 120 may range from 0.3 mm to 0.35 mm, 0.4 mm, 0.5 mm, 0.55 mm, etc.

[0212] Please refer to Figures 17 and 18 again. In some embodiments, the conductive member 30 includes a second conductive portion 302 connected to the first conductive portion 301. The second conductive portion 302 corresponds to the second tube segment 102. The second conductive portion 302 is provided with a second hollow portion 352. Part of the second tube segment 102 is exposed through the second hollow portion 352 and faces the outer tube 20. The hollow portion 35 includes the second hollow portion 352.

[0213] In this way, the heat capacity of the conductive element 30 can be further reduced, shortening the time required for the heating component 100 to heat up and cool down.

[0214] Specifically, the second hollow portion 352 can be in the shape of a straight bar, a curved line, a circular hole, or the like. The number of second hollow portions 352 can be one, two, three, or more. The portion of the outer circumference of the second tube segment 102 covered by the second conductive portion 302 is in close contact with and covered by the second conductive portion 302. The portion of the outer circumference of the second tube segment 102 not covered by the second conductive portion 302 can face the inner wall of the outer tube 20 through the second hollow portion 352.

[0215] Referring to Figures 18 and 20, in some embodiments, the second conductive portion 302 includes a plurality of second conductive strips 342, the plurality of second conductive strips 342 extend axially along the second tube segment 102, the plurality of second conductive strips 342 are arranged at intervals along the circumference of the second tube segment 102, and a second hollow portion 352 is formed between two adjacent second conductive strips 342.

[0216] In this way, the thermal resistance of the high temperature of the arc in the center of the discharge region 130 to be conducted outward can be further reduced, thereby increasing the heating rate.

[0217] Specifically, the second conductive strip 342 and the second hollow portion 352 can be cut and formed in the metal tube body. The second conductive strip 342 and the second hollow portion 352 can be arranged sequentially along the circumference of the second tube segment 102. The second conductive strip 342 can have one end connected to the second end portion 32 and extend from the second end surface 12 to below the end surface of the first electrode 110 facing the second electrode 120. The second conductive strip 342 can have side edges parallel to the central axis of the inner tube. The second hollow portion 352 is formed between adjacent side edges of two adjacent second conductive strips 342.

[0218] The number of the second conductive strips 342 can be two, three, four, five, etc. The plurality of second conductive strips 342 form a plurality of second hollow portions 352. Correspondingly, the number of the second hollow portions 352 is the same as the number of the second conductive strips 342.

[0219] 18 , in some embodiments, a connecting ring 343 is formed at the connection between the first conductive portion 301 and the second conductive portion 302 . The connecting ring 343 covers the end of the first electrode 110 facing the second electrode 120 along the circumference of the inner tube 10 .

[0220] In this way, by providing the connecting ring 343 , the local electric field strength can be reduced, thereby avoiding discharge breakdown between the first electrode 110 and the conductive member 30 , and the mechanical strength of the conductive member 30 can be enhanced, thereby reducing the risk of deformation and failure of the conductive member 30 .

[0221] Specifically, the connecting ring 343 may be a portion of the conductive member that is retained when the hollow portion 35 is cut on the wall of the conductive member 30 and covers the circumference of the end portion of the first electrode 110 facing the second electrode 120 .

[0222] According to the following formula, the relationship between the side wall area and the electric field strength is that when the side wall area decreases, the field strength increases; when the side wall area increases, the field strength decreases.

[0223] Where E is the electric field intensity, U is the voltage applied between the two electrodes, d is the discharge distance, Q is the charge carried by the electrode, S is the discharge area, k is the electrostatic force constant, and is the dielectric constant of the medium between the two electrodes.

[0224] It is understood that the formation of the hollow portion 35 in the conductive member 30 reduces the sidewall area and increases the electric field strength between the sidewalls, which can easily lead to breakdown between the first electrode 110 and the conductive member 30, affecting the stability and safety of the heating component 100. The connecting ring 343 covers the discharge end of the first electrode 110, which can reduce the local electric field formed around the discharge end of the first electrode 110, thereby preventing breakdown between the first electrode 110 and the conductive member 30.

[0225] 14 and 15 , in some embodiments, the hollow portion 35 extends from the first tube segment 101 to the end of the second tube segment 102 away from the first tube segment 101 , and a portion of the second tube segment 102 faces the outer tube 20 through the hollow portion 35 .

[0226] In this way, referring to FIG. 11 and FIG. 1 , the heat transfer path at the bottom of the conductive member 30 can be cut off to the greatest extent, thereby reducing the downward conduction of heat and improving the efficiency of using the heat to heat the aerosol-forming substrate 300 .

[0227] Specifically, the hollow portion 35 can be formed by cutting the sidewall of the conductive member 30. A portion of the conductive member 30 surrounding the second electrode can be retained to form a second conductive ring 320 for connecting to the second electrode 120. A portion of the conductive tube wall can be retained at the end of the conductive member 30 closest to the first end face 11 to form a first conductive ring 310 for connecting to the power source 200. The first conductive ring 310 can be exposed outside the outer tube 20.

[0228] As shown in Figures 15 and 18 , the first conductive ring 310 and the second conductive ring 320 are connected by a conductive strip 34. The number of conductive strips 34 connecting the first conductive ring 310 and the second conductive ring 320 can be one. A hollow portion 35 is formed between the first conductive ring 310 and the second conductive ring 320. The outer circumferences of the first and second tube segments 101 and 102 face the outer tube 20 through the hollow portion 35.

[0229] As shown in Figures 12 and 13, in some embodiments, the conductive member 30 includes a connection wire 33 connected to the first conductive ring 310. The connection wire 33 is electrically connected to the power source 200. The connection wire 33 may have a stiffness less than that of the conductive member 30 tube. The connection wire 33 may extend radially along the inner tube 10. The connection wire 33 may also extend on the outer tube 20 in a direction away from the conductive end 112 of the first electrode 110.

[0230] Please refer to FIG. 15 . In some embodiments, the conductive member 30 is at least partially cylindrical, and the conductive member 30 is sleeved outside the inner tube 10 .

[0231] In this way, the conductive member 30 and the inner tube 10 are easily assembled and have a compact structure, which is conducive to the miniaturization of the heating component 100.

[0232] Specifically, the conductive member 30 may be cylindrical and coaxial with the inner tube 10 . The inner tube 10 is nested in the conductive member 30 .

[0233] In some embodiments, referring to FIG. 21 , the conductive member 30 is in close contact with the outer wall of the inner tube 10. The gap between the conductive member 30 and the outer wall of the inner tube 10 is less than or equal to 0.1 mm. The first electrode 110 and the second electrode 120 generate a plasma arc in the discharge region 130, and the maximum temperature can reach 2000°C. A large amount of heat in the center of the discharge region 130 is conducted or radiated through the inner tube 10, the conductive member 30, and the outer tube 20 to the aerosol-forming matrix 300 around the outer tube 20. The conductive member 30 is in close contact with the outer wall of the inner tube 10, and the heat conduction efficiency is higher. In addition, ensuring that the distance between the conductive member 30 and the inner tube 10 is close, or the conductive member 30 is in close contact with the inner tube 10, can effectively prevent the conductive member 30 from contacting the inner wall of the outer tube 20, thereby avoiding uneven temperature field distribution in the outer tube 20.

[0234] Please refer to FIG. 22 . In some embodiments, the cylindrical portion of the conductive member 30 is made by winding and is sleeved on the outer surface of the inner tube 10 .

[0235] In this way, the assembly tightness between the conductive member 30 and the inner tube 10 can be improved, and tight assembly is beneficial to heat conduction.

[0236] Specifically, the conductive member 30 can be formed by winding sheet metal. The sheet metal can be wound around the central axis 1011, and the wound sheet metal can wrap around the inner tube to form a cylindrical or annular conductive tube. The conductive tube can have a gap in the axial direction of the inner tube 10, so that the conductive member 30 has a "C"-shaped cross-section along the radial direction of the inner tube 10. This facilitates adjustment of the diameter of the wound tube body, thereby adjusting the tightness of the assembly between the conductive member 30 and the inner tube 10.

[0237] Please refer to Figure 16. In some embodiments, the conductive member 30 includes a conductive wire 330, which is wrapped around the inner tube 10 and forms a hollow portion 35. The tube section of the inner tube 10 corresponding to the conductive member 30 is partially exposed to the outer tube 20 through the hollow portion 35.

[0238] In this way, the conductive wire 330 can reduce the heat capacity and increase the speed of heating and cooling.

[0239] Specifically, the conductive wire 330 surrounds the inner tube, dividing the outer circumference 1001 of the inner tube 10 and the corresponding tube section of the conductive member 30 into different blocks to form a hollow portion.

[0240] In some embodiments, the upper end of the conductive member 30 is connected to the second electrode 120, and the lower end is located near the open end 22 of the outer tube 20. The conductive member 30 can extend from the open end 22 to the outside of the outer tube 20 and connect to the power source 200. The conductive member 30 can also surround the inner tube 10 from the second end surface 12 to the open end 22. The connection point between the conductive member 30 and the second electrode 120 and the location where the conductive member 30 extends from the open end 22 can be on the same side of the inner tube 10, or on opposite sides of the inner tube 10.

[0241] Specifically, the conductive member 30 may be formed by one conductive wire 330 , two conductive wires 330 , or three or more conductive wires 330 surrounding the inner tube 10 .

[0242] When there is only one conductive wire 330, each conductive wire 330 wraps around the inner tube 10 at least once. In some embodiments, the conductive wire 330 wraps around the discharge region 130 two or more times. The conductive wire 330 may also extend in a nearly straight path between the second electrode 120 and the opening of the outer tube 20. The portion of the inner tube 10 not covered by the conductive wire 330 faces the inner wall of the outer tube 20.

[0243] Referring to FIG. 16 and FIG. 23 , in some embodiments, the conductive wire 330 is wound around to form a solenoid 30 a , and at least a portion of the solenoid 30 a has a pitch greater than 0 to form a hollow portion 35 .

[0244] In this way, the conductive wire 330 forms a solenoid 30a, which is easy to assemble with the inner tube 10. At the same time, the pitch of the solenoid 30a can be adjusted to reduce the heat capacity of the conductive member 30, reduce the heat stored in the conductive member 30, and increase the heating rate.

[0245] Specifically, the conductive wire 330 can wrap around the inner tube 10 and extend from the second end surface 12 to the first end surface 11 to form a solenoid 30a. The pitch of the solenoid 30a can be the distance between one turn of the conductive wire 330 around the inner tube and the next turn in the axial direction of the inner tube.

[0246] It can be understood that the looser the conductive wire 330 is wound, the larger the pitch of the solenoid 30a formed, the smaller the heat capacity of the conductive spiral, the larger the area of ​​the outer peripheral surface 1001 covered by the conductive wire 330, and the higher the heating rate.

[0247] Continuing to refer to FIG. 16 and FIG. 23 , in some embodiments, along the axial direction of the solenoid 30 a , the pitch of the middle portion of the solenoid 30 a is greater than the pitch of at least one end.

[0248] In this way, the uneven pitch can be used to adjust the heat capacity distribution of the conductive member and the temperature field of the heating component 100, thereby increasing the heating rate and reducing heat conduction from the discharge region to components other than the aerosol-forming substrate 300.

[0249] Specifically, one end of the solenoid 30a is fixed to the outer periphery of the second electrode 120, and the other end of the solenoid 30a can be fixed to a position between the first end face 11 and the second end face 12 of the inner tube 10, at an axial distance greater than 2 mm from the first end face 11. The pitch of the solenoid 30a in the portion between the two ends can be greater than the pitch at the two ends.

[0250] In some embodiments, the conductive wire 330 is connected to the second electrode 120 and tightly wound around the second end surface 12 to stabilize the connection. The pitch of the solenoid 30a formed around the second electrode 120 is close to zero. The increased pitch of the solenoid 30a in the tube section below the discharge region 130 reduces the heat capacity of the conductive solenoid 30a, increases the radiation area of ​​the inner tube 10 facing the outer tube 20, and improves the heating rate.

[0251] Furthermore, the spiral tube body can be tightly matched or nested with the tube body of the inner tube 10.

[0252] Please refer to FIG. 24 . In some embodiments, one end of the solenoid 30 a fixed between the first end surface 11 and the second end surface 12 of the outer periphery of the inner tube 10 may be exposed outside the outer tube 20 .

[0253] In some embodiments, the conductive wires 330 form a mesh, and the mesh holes of the mesh form the hollow portion 35 .

[0254] In this way, the conductive wires 330 form a mesh to maintain a relatively stable structure, and at the same time, the hollow area of ​​the hollow portion 35 is large, which can effectively reduce the heat capacity.

[0255] Specifically, the conductive member 30 can be a mesh tube formed by interlacing multiple conductive wires 330. The mesh tube can be sleeved outside the inner tube 10 and tightly fit the inner tube 10. The conductive wires 330 can also be arranged in a staggered manner to form a mesh and coated on the outer wall of the inner tube 10.

[0256] In some embodiments, the wire material comprising the solenoid 30a or the mesh light is a round wire, a flat ribbon wire, or the like. The cross-sectional thickness of the conductive member 30 is in the range of 0.05 mm to 0.2 mm. Furthermore, the cross-sectional thickness of the conductive member 30 is preferably in the range of 0.05 mm to 0.1 mm. For example, the cross-sectional thickness of the conductive member 30 may be 0.05 mm, 0.06 mm, 0.07 mm, or 0.1 mm.

[0257] In some embodiments, the conductive member 30 is a coating film coated on the outer wall of the inner tube 10. The conductive member 30 is coated on the outer wall of the inner tube 10 and can be in the form of a straight strip, a cylindrical shape, a curved strip, etc., and conducts the circuit along the corresponding track.

[0258] In some embodiments, the first end portion 31 and the position where the first electrode 110 is exposed from the inner tube 10 are spaced apart along the axial direction of the inner tube 10 .

[0259] In this way, the first end portion 31 can utilize the axial space of the heating component 100 along the inner tube 10, so that the spacing between the first end portion 31 and the position where the first electrode 110 is exposed from the inner tube 10 is reasonably arranged, thereby reducing the probability of discharge between the first end portion 31 and the first electrode 110 and improving the reliability of normal use of the heating component 100.

[0260] As previously described, in conjunction with Figure 12 , the position where the first electrode 110 protrudes from the inner tube 10 is designated P. The portion of the first end portion 31 extending outside the outer tube 20, where the distance from point P is shortest in the axial direction of the inner tube 10, is designated Q. The conductive member 30 can be bent at point Q of the first end portion 31 and continue to extend radially of the inner tube or in a direction substantially aligned with the inner tube's radial direction, away from the first electrode 110, to connect to the power source 200.

[0261] The first end 31 is connected to the second end 32. The second electrode 120 is electrically connected to the second end 32 and forms a path with the conductive member 30, conducting one pole of the high voltage. P and Q are separated by a predetermined distance and insulated by the inner tube 10. This prevents discharge or even breakdown between P and Q when the conductive member 30 and the first electrode 110 conduct high voltage electricity, thereby ensuring discharge reliability in the discharge area 130.

[0262] Inner tube 10 can be made of a material with high dielectric strength, such as quartz or ceramic. Such materials are also transparent to infrared radiation. The high dielectric strength of inner tube 10 reduces the probability of plasma arc breakdown.

[0263] In some embodiments, the wall thickness of the inner tube 10 ranges from 0.3 mm to 1.0 mm. For example, the wall thickness of the inner tube 10 can range from 0.3 mm to 1.0 mm, 0.4 mm to 0.8 mm, 0.5 mm to 0.7 mm, 0.55 mm to 0.6 mm, etc. For another example, the wall thickness of the inner tube 10 can range from 0.3 mm to 0.5 mm, 0.6 mm, 0.8 mm, or 1.0 mm. In this way, the inner tube 10 can meet certain strength requirements, prevent stress fracture and arc breakdown, and reduce heat capacity, which is conducive to the miniaturization of the heating component 100.

[0264] In some embodiments, a suitable heat capacity can not only improve the heating efficiency during the heating process, but also maintain a suitable cooling rate during the puffing interval to avoid overheating of the aerosol-forming substrate 300 .

[0265] Please refer to Figures 12 and 13. In some embodiments, the inner tube 10 includes a first end face 11 and a second end face 12 opposite to the first end face 11. The first electrode 110 is exposed from the inner tube 10 at the first end face 11, and the first end portion 31 is at least partially located between the first end face 11 and the second end face 12.

[0266] Thus, through the reasonable arrangement of the inner tube 10 , the first electrode 110 and the conductive member 30 , the inner tube 10 can isolate and protect the conductive member 30 from the first electrode 110 , thereby reducing the possibility of discharge breakdown between the first end portion 31 and the first end face 11 .

[0267] Specifically, the first end face 11 and the second end face 12 can be annular. The centers of the first end face 11 and the second end face 12 are passed through by the central axis 1011 of the inner tube 10. The second electrode 120 can be disposed at the center of the second end face 12. The conductive end 112 can surround the center of the second end face 12 to form a second end portion 32, and the second end portion 32 is electrically connected to the second electrode 120. It should be noted that there are various ways to connect the second end portion 32 of the conductive member 30 to the second electrode 120. The surrounding method facilitates assembly and improves connection reliability. It is understood that this can also be achieved through crimping, welding, and the like.

[0268] The first electrode 110 can be inserted into the inner tube 10 from the center of the first end surface 11, with the end of the first electrode 110 inserted into the inner tube 10 facing the second electrode 120 and spaced a predetermined distance from the first end surface 11. Alternatively, the end of the first electrode 110 inserted into the inner tube 10 can be spaced the same distance from the first end portion 31 in the axial direction of the inner tube 10.

[0269] The inner tube 10 encloses at least a portion of the first electrode 110, and the conductive member 30 is attached to the outer wall of the inner tube 10, thereby providing insulation protection between the first electrode 110 and the conductive member 30. A predetermined distance exists between the end of the first electrode 110 exposed from the inner tube 10 at the first end surface 11 and the first end portion 31 along the axial direction of the inner tube 10, and the inner tube 10 partially covers the interval between the first electrode 110 and the first end portion 31.

[0270] The cross-sectional shape of the inner tube 10 includes, but is not limited to, circular, square, elliptical, etc., and can also be matched with the cross-sectional shape of the first electrode 110 .

[0271] Referring again to Figures 12 and 13, in some embodiments, the first electrode 110 is generally cylindrical. The first electrode 110 can be hollow or solid. The cross-sectional shape of the first electrode 110 includes, but is not limited to, circular, elliptical, square, polygonal, and the like.

[0272] For example, the first electrode 110 is in the shape of a solid cylinder and is inserted into the hollow cylindrical inner tube 10, which is beneficial for miniaturizing the structure of the heating module. The first electrode 110 is inserted into the inner tube 10 and is coaxial with the inner tube 10.

[0273] In some embodiments, the first electrode 110 includes a discharge end 111 and a conductive end 112 connected to the discharge end 111. The discharge end 111 is located within the inner tube 10, and the conductive end 112 extends from the first end surface 11 outside the inner tube 10. Therefore, it can be understood that the position where the first electrode 110 is exposed from the inner tube 10, in this embodiment, can be the position where the conductive end 112 is exposed from the inner tube 10.

[0274] Specifically, the discharge end 111 can be vertically inserted into the hollow space of the inner tube 10, opposite the second electrode 120. The conductive end 112 extends outside the inner tube 10, is connected to the power supply 200, and conducts high voltage to generate plasma between the discharge end 111 and the second electrode 120.

[0275] In the orientation of Figure 12 , the direction from the second end face 12 to the first end face 11 along the axial direction of the inner tube 10 can be from top to bottom. In the heating component 100, the second electrode 120, the second end 32 of the conductive member 30, the discharge end 111 of the first electrode 110, the first end 31 of the conductive member 30, and the conductive end 112 of the first electrode 110 are arranged in order from top to bottom along the axial direction of the inner tube 10. The first end face 11 is located below the first end face 31, and the second end face 12 is in close contact with one side surface of the second electrode 120.

[0276] In some embodiments, the first electrode 110 is cylindrical, and the diameter of the first electrode 110 ranges from 0.4 mm to 1.0 mm. It should be noted that the cross-sectional shape of the first electrode 110 is not limited to a circle, and can be a square, polygonal, elliptical, etc. The diameter of the first electrode 110 is the diameter of the circumscribed circle of the cross section of the first electrode 110.

[0277] This is beneficial for miniaturization of the heating component 100 and can also improve the burning life of the first electrode 110 .

[0278] For example, the first electrode 110 can be a metal wire having a diameter not less than 0.4 mm and not more than 1.0 mm. The diameter of the first electrode 110 can be slightly smaller than the inner diameter of the inner tube 10. For example, the diameter of the first electrode 110 can range from 0.4 mm to 1.0 mm, 0.5 mm to 0.9 mm, 0.6 mm to 0.7 mm, 0.75 mm to 0.8 mm, etc. For another example, the diameter of the first electrode 110 can be 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm.

[0279] It is understood that the discharge between the end of the first electrode 110 extending into the inner tube 10 and the second electrode 120 generates a plasma arc, which must withstand the high temperature of the plasma arc. A larger diameter of the first electrode 110 requires more heat to generate the burn. Therefore, appropriately increasing the diameter of the first electrode 110 can improve the burn-resistant lifespan. Furthermore, the diameter of the first electrode 110 is limited by the inner diameter of the inner tube 10. Due to the need for miniaturization, the diameter of the first electrode 110 does not exceed 1.0 mm.

[0280] In some embodiments, the first electrode 110 is made of a heat-resistant conductive material. Specifically, the first electrode 110 is made of at least one of a nickel-based alloy, an iron-based alloy, a copper-based alloy, zirconium, hafnium, and tungsten. The use of such heat-resistant conductive materials improves the durability of the first electrode 110 under the high temperatures generated by the plasma arc. The material of the first electrode 110 and the material of the second electrode 120 can be the same or different.

[0281] Referring to FIG. 25 and FIG. 26 , in some embodiments, the heating component 100 includes an insulating member 40 connected to the inner tube 10 , and at least a portion of the insulating member 40 is located between the first end portion 31 and the first end surface 11 .

[0282] In some embodiments, the insulating member 40 is sleeved outside the inner tube 10 and is not in direct contact with the inner tube 10 . At least a portion of the insulating member 40 is located between the first end portion 31 and the first end surface 11 .

[0283] In this way, the insulating member 40 enhances the insulation strength between the first end portion 31 and the first end surface 11 , further reducing the possibility of discharge breakdown between the first end portion 31 and the first end surface 11 , thereby improving the insulation and heating reliability of the heating component 100 .

[0284] Specifically, the insulating member 40 can be fixedly connected to the end of the inner tube 10 away from the second electrode 120. The insulating member 40 can be sleeved outside the inner tube 10 to isolate the first end face 11 from the first end portion 31. The insulating member 40 can be a sleeve made of a soft insulating material, such as a rubber sleeve. The insulating member 40 can be a rubber sleeve with an interference fit with the inner tube 10. The insulating member 40 can also be encapsulated with encapsulating glue, encapsulating glass glaze, etc., encapsulated at the end of the inner tube 10 near the first end face 11.

[0285] In some embodiments, the end portion of the inner tube 10 having the first end surface 11 is inserted into the insulating member 40 , and the first electrode 110 is disposed through the insulating member 40 .

[0286] In this way, at the first end face 11, the first electrode 110, the inner tube 10 and the insulating part 40 are nested in sequence, the structure is compact, and it is easy to assemble and produce. In addition, the part of the first electrode 110 at the first end face 11 is wrapped by the insulating part 40, and the P point of the first electrode 110 is not easy to discharge with the Q point of the conductive part 30.

[0287] Specifically, the insulating member 40 can be hollow and tubular, with the wall of the insulating member 40 being thicker than the wall of the inner tube 10. The first electrode 110 can sequentially pass through the first end surface 11 of the inner tube 10 and the insulating member 40. The end of the inner tube 10 with the first end surface 11 wraps around the first electrode 110 and is inserted into the insulating member 40 together with the first electrode 110. The first electrode 110 can pass through the first end surface 11, penetrate the insulating member 40 along the axial direction of the inner tube 10, and exit the insulating member 40 from the side of the insulating member 40 facing away from the first end surface 11.

[0288] Please refer to Figures 25 and 26. In some embodiments, the insulating member 40 includes a first insulating portion 41 and a second insulating portion 42 connected to the first insulating portion 41. The cross-sectional area of ​​the first insulating portion 41 is smaller than the cross-sectional area of ​​the second insulating portion 42. The end of the inner tube 10 having the first end face 11 is inserted into the first insulating portion 41, and the first electrode 110 is passed through the second insulating portion 42.

[0289] In this way, the insulating member 40 can wrap and insulate the inner tube 10 and the first electrode 110 to varying degrees, thereby improving structural stability and enhancing insulation protection for the first electrode 110 through the second insulating portion 42 .

[0290] For example, referring to FIG. 26 , a first insulating portion 41 and a second insulating portion 42 are connected. The first insulating portion 41 is in the shape of a hollow cylinder, while the second insulating portion 42 is in the shape of a cube and has a central through-hole 421. The central through-hole 421 of the second insulating portion 42 may be continuous with the hollow portion of the first insulating portion 41.

[0291] 26 , the inner tube 10 wraps the first electrode 110 and is inserted into the first insulating portion 41 . The first electrode 110 extends out of the inner tube 10 from the first end surface 11 in the first insulating portion 41 and is inserted into the through hole 421 of the second insulating portion 42 .

[0292] 25 and 26 , in some embodiments, the insulating member 40 covers the portion of the first electrode 110 located at the first end surface 11 .

[0293] In this way, the insulating member 40 reduces the probability of discharge breakdown of the first electrode 110 at the first end surface 11 and can further reduce the distance between the end of the first electrode 110 extending out of the inner tube 10 and the first end portion 31 , which is beneficial to the miniaturization of the heating component 100 .

[0294] In related art, the first electrode and the conductive member are connected to the two poles of an external power source, respectively. A large distance must be maintained between the portion of the first electrode extending from the inner tube and the first end of the conductive member to prevent discharge and breakdown between the first electrode and the first end, which could damage the heating element. In the embodiment of the present application, the insulating member 40 covers the portion of the first electrode 110 extending from the inner tube 10, thereby reducing the distance between the end of the first electrode 110 extending from the inner tube 10 and the first end 31.

[0295] Specifically, the second insulating portion 42 covers the portion of the first electrode 110 that extends from the first end surface 11 out of the inner tube 10. The first electrode 110 is sequentially wrapped by the inner tube 10 and the first insulating portion 41 within the first insulating portion 41, and the portion of the first electrode 110 exposed outside the inner tube 10 is only wrapped by the second insulating portion 42.

[0296] It can be understood that the cross-sectional area of ​​the first insulating portion 41 is smaller than that of the second insulating portion 42. The thickness of the second insulating portion 42 is greater than that of the first insulating portion 41, thereby enhancing the insulation strength of the second insulating portion 42. The larger cross-sectional area of ​​the second insulating portion 42 can enhance the insulation protection of the portion of the first electrode 110 exposed to the outside of the inner tube 10.

[0297] In some embodiments, the insulating member 40 contacts the first end surface 11 to enhance structural compactness and improve insulation.

[0298] Please refer to Figures 25 and 26 again. In some embodiments, the heating component 100 includes a connector 50 connecting the first electrode 110 away from the second electrode 120. The connector 50 is used to electrically connect to the power supply 200. The connector 50 is located on the side of the insulating member 40 away from the first end 31. The insulating member 40 covers the connector 50 along the axial direction of the inner tube 10.

[0299] In this way, by connecting the first electrode 110 to the power source 200 via the connector 50 , the distance required for maintaining insulation between the first electrode 110 and the first end portion 31 can be further shortened, thereby making the heating component 100 more compact.

[0300] Specifically, the connector 50 is electrically connected to an end of the first electrode 110 that is distal from the second electrode 120. The connector 50 may be disc-shaped, covering the portion of the first electrode 110 that extends outside the second insulating portion 42. The end of the connector 50 connected to the first electrode 110 may extend into the through-hole 421 of the second insulating portion 42. The insulating member 40 is at least partially located between the connector 50 and the conductive member 30. The second insulating portion 42 may cover the side of the connector 50 that is connected to the first electrode 110.

[0301] Referring to FIG. 26 and FIG. 27 , in some embodiments, the second electrode 120 abuts against the second end surface 12 .

[0302] In this way, the second electrode 120 can be installed at the end of the inner tube 10 having the second end surface 12 , and the second end surface 12 plays a role in fixing and limiting the second electrode 120 .

[0303] Specifically, the second electrode 120 may cover the entire second end surface 12, sealing the end of the inner tube 10 having the second end surface 12. The side of the second electrode 120 facing the first electrode 110 is in close contact with the second end surface 12. The side of the second electrode 120 facing away from the second end surface 12 is toward the closed end of the outer tube 20.

[0304] In some embodiments, the second electrode 120 is made of a heat-resistant conductive material. Using a heat-resistant conductive material can increase the burn-resistant life of the second electrode 120, thereby improving the discharge reliability of the heating component 100. Exemplarily, the material of the second electrode 120 is at least one of a nickel-based alloy, an iron-based alloy, a copper-based alloy, zirconium, hafnium, and tungsten.

[0305] Referring to Figures 27 and 31, in some embodiments, the second electrode 120 includes a mounting portion 121 and a protrusion 122 formed on the mounting portion 121. The protrusion 122 extends into the inner tube 10 and faces the first electrode 110.

[0306] In this way, the protrusion 122 can guide the first electrode 110 and the second electrode 120 to discharge in the inner tube 10, which is beneficial to the generation of plasma arc.

[0307] Specifically, the mounting portion 121 may be disc-shaped, and the diameter of the mounting portion 121 may be slightly larger than the outer diameter of the inner tube 10. The mounting portion 121 abuts against the second end surface 12, and the second end portion 32 of the conductive member 30 surrounds the second electrode 120, so that the second electrode 120 is fixedly mounted on the end of the inner tube 10 having the second end surface 12.

[0308] The protrusion 122 may be spherical or hemispherical and is formed on the side of the mounting portion 121 close to the second end surface 12. The width of the protrusion 122 along the axial direction of the inner tube 10 is smaller than the inner diameter of the inner tube 10, and the width gradually decreases as it approaches the second electrode 120 along the axial direction of the inner tube 10.

[0309] As can be understood, the larger radius of curvature of protrusion 122 facilitates the concentration of charge in the conductive medium at locations with larger curvature radii, generating a greater electric field strength and facilitating plasma generation. The rate of change of protrusion 122 along the axial width of inner tube 10 is relatively gradual to avoid excessive charge concentration and ablation caused by excessively sharp protrusions 122.

[0310] Referring to FIG. 15 and FIG. 26 , in some embodiments, the center of the protrusion 122 is located on the central axis 1011 of the inner tube 10 .

[0311] In this way, the protrusion 122 can guide the arc to discharge at the center point of the first electrode 110, thereby improving the circumferential uniformity of the discharge temperature.

[0312] As previously mentioned, the first electrode 110 is coaxial with the inner tube 10. The discharge region 130 is the area between the second electrode 120 and the first electrode 110 where a plasma arc is generated. The second electrode 120 directs the discharge via a protrusion 122 directed toward the first electrode 110. The center of the protrusion 122 is located on the central axis 1011 of the inner tube 10. The center of the first electrode 110 is also located on the central axis 1011 of the inner tube 10, increasing the probability that the center of the discharge region 130 will be located on the central axis 1011 of the inner tube 10.

[0313] In some embodiments, the end surface of the first electrode 110 extending into the inner tube 10 is slightly protruding, has a relatively blunt arc shape, and a smooth surface. The vertex of the protrusion of the first electrode 110 end surface can be located on the central axis 1011 of the inner tube 10, opposite the protrusion 122 of the second electrode 120.

[0314] In some embodiments, the end of the first electrode 110 extending into the inner tube 10 has a flat end surface, the center of which is located on the central axis 1011 of the inner tube 10 and facing the apex of the protrusion 122 .

[0315] 26 and 27 , in some embodiments, the outer tube 20 includes a tapered end portion 21 , and the second electrode 120 is disposed at one end of the inner tube 10 and abuts against the inner wall of the tapered end portion 21 .

[0316] One end of the outer tube 20, which has a tapered end 21, is inserted into the aerosol-forming substrate 300. The second electrode 120 has a protrusion 122 at its center, which extends into the inner tube 10. The center of the protrusion 122 is located on the central axis 1011 of the inner tube 10. The outer tube 20 and the inner tube 10 are generally coaxial. The side of the mounting portion 121 facing away from the second end surface 12 abuts against the inner wall of the tapered end 21.

[0317] In this way, the second electrode 120 abuts against the outer tube 20 and the inner tube 10 to achieve automatic centering and alignment, which is convenient for assembly and is conducive to uniform heat transfer to the circumference of the outer tube 20.

[0318] Please refer to FIG. 26 again. The position where the first electrode 110 is exposed from the inner tube 10 can be indicated by P, and the position where the first end portion 31 is closest to point P can be indicated by Q.

[0319] In some embodiments, along the axial direction of the inner tube 10 , a distance between the first end portion 31 and a position where the first electrode 110 is exposed from the inner tube 10 is greater than or equal to 2 mm.

[0320] In this way, the arc breakdown from the first end 31 can be reduced. At the same time, the axial distance between the position where the first electrode 110 extends out of the inner tube 10 and the first end 31 can be reduced, thereby reducing the axial length of the heating component 100 in the inner tube 10 and saving costs.

[0321] Illustratively, the PQ segment is aligned with the central axis 1011 of the inner tube 10. It should be understood that the length of the PQ segment is the minimum distance between the first end 31 and the location where the first electrode 110 is exposed outside the inner tube 10. The length of the PQ segment is no less than 2 mm. The length of the PQ segment can be 2.1 mm, 2.3 mm, 2.5 mm, 2.6 mm, 3 mm, 4 mm, etc. The distance between other locations on the conductive member 30 and the portion of the first electrode 110 exposed outside the inner tube is greater than the length of the PQ segment.

[0322] It should be noted that the line segment PQ is in the same direction as the central axis 1011 of the inner tube 10, which does not limit the two to be parallel. They can be roughly parallel, or the angle between the line segment PQ and the central axis 1011 of the inner tube 10 is less than or equal to 60°, or less than or equal to 30°.

[0323] In some embodiments, the shortest distance between the conductive member 30 and the position where the first electrode 110 is exposed from the inner tube 10 is greater than or equal to 2 mm.

[0324] As mentioned above, maintaining the distance between the conductive member 30 and the position where the first electrode 110 is exposed from the inner tube 10 can prevent breakdown outside the discharge region 130 and cause failure of the heating component 100.

[0325] Specifically, the second end 32 of the conductive member 30 is fixed to the first end face 11 of the inner tube 10 and extends along the outer wall of the inner tube 10 from the second end face 12 toward the first end face 11. The end of the conductive member 30 closest to the second end face 12 and the location where the first electrode 110 is exposed from the inner tube 10 is the first end 31. In other words, the distance between the conductive member 30 and any location on the connection wire 33 other than the first end 31 and the location where the first electrode 110 is exposed from the inner tube 10 is greater than the distance between the first end 31 and the location where the first electrode 110 is exposed from the inner tube 10.

[0326] Furthermore, the distance between the first end portion 31 and the position where the first electrode 110 is exposed from the inner tube 10 has a critical value of 2 mm. If the distance between the first end portion 31 and the position where the first electrode 110 is exposed from the inner tube 10 exceeds the critical value of 2 mm, when high voltage is conducted between the first electrode 110 and the conductive member 30, breakdown is likely to occur in the area between the first end portion 31 and the first electrode 110 exposed from the inner tube 10.

[0327] Please refer to Figures 27 and 28. In some embodiments, the heating component 100 includes an infrared radiation film 60. The infrared radiation film 60 is disposed on the inner tube 10, the outer tube 20 and / or the conductive member 30.

[0328] In this way, the ability of the heating component 100 to heat through infrared radiation can be enhanced, further improving the utilization rate of the plasma arc heat.

[0329] Specifically, the infrared radiation film 60 may be a coating attached to the inner or outer wall of the inner tube 10, outer tube 20 and / or conductive member 30. The coating material of the infrared radiation film 60 may be a metal oxide, silicon or other material that can specifically absorb infrared radiation.

[0330] For example, the infrared radiation film 60 can be made of one or more of the following materials: iron manganese copper oxide, CrC, TiCN, diamond-like carbon (DLC), black silicon (HBQ), dolmanite, transition metal oxide spinel, rare earth oxide, ion-co-doped calcium ore, silicon carbide, zircon, boron nitride, etc. Exemplarily, the infrared radiation film 60 is coated on the outer wall surfaces of the outer tube 20 and the conductive member 30, as well as the outer wall surface of the inner tube 10 not covered by the conductive member 30.

[0331] Please refer to FIG. 27 and FIG. 28 again. In some embodiments, a thermal insulation gap 1002 is formed between the inner tube 10 and the conductive member 30 and the inner wall surface of the outer tube 20 .

[0332] Thus, the provision of the thermal insulation gap 1002 can increase the temperature difference between the outer tube 20 and the center of the discharge area 130, thereby preventing the outer tube 20 from overheating for a long time, thereby increasing the radiation temperature in the center of the discharge area 130 and improving the energy of infrared radiation.

[0333] Specifically, the high temperature of the plasma arc in the center of the discharge region 130 can exceed 2000° C., and the stable temperature is 1000° C. to 1600° C. The heat of the discharge region 130 is radiated to the aerosol-forming substrate 300 through the inner tube 10 and the outer tube 20 in the form of infrared radiation.

[0334] In some embodiments, the temperature measuring component 80 can also be set in the insulation gap 1002 between the inner tube 10 and the outer tube 20. The temperature measuring component 80 can include a thermocouple or a temperature measuring probe, and the thermocouple and temperature measuring probe can be located in the interval below the discharge area 130.

[0335] A temperature of approximately 350°C on the outer tube 20 effectively heats the aerosol-forming substrate 300. A thermal insulation gap 1002 is provided between the outer tube 20, the inner tube 10, and the conductive element 30, isolating the outer tube 20 from the discharge region 130. This prevents heat from concentrating in the outer tube 20 and causing prolonged overheating. The thermal insulation gap 1002 isolates the outer tube 20 from the inner tube 10 and the conductive element 30, increasing the temperature difference between the outer tube 20 and the discharge region 130. While the temperature of the outer tube 20 does not exceed 350°C, the temperature of the discharge region 130 can be relatively high, significantly reducing preheating time. The energy of infrared radiation is proportional to temperature to the fourth power: the higher the temperature at the center of the discharge region 130, the greater the energy radiated to the aerosol-forming substrate 300.

[0336] In some embodiments, the width of the insulation gap 1002 ranges from 0.05 mm to 0.3 mm.

[0337] In this way, the outer tube 20 can be prevented from being overheated for a long time, while keeping the structure of the heating component 100 relatively compact and miniaturized.

[0338] Exemplarily, the width of the thermal insulation gap 1002 ranges from 0.05 mm to 0.3 mm, 0.06 mm to 0.15 mm, 0.15 mm to 0.3 mm, 0.07 mm to 0.25 mm, 0.1 mm to 0.2 mm, etc. For example, the width of the thermal insulation gap 1002 is 0.05 mm, 0.06 mm, 0.08 mm, 0.12 mm, 0.16 mm, 0.17 mm, 0.2 mm, 0.25 mm, 0.28 mm, 0.3 mm, etc. Specifically, the thermal insulation gap 1002 between the inner tube 10 and the outer tube 20 can be uneven. The outer wall of the inner tube 10 is partially covered by the conductive member 30, and the portion of the inner tube 10 covered by the conductive member 30 has a smaller thermal insulation gap 1002 than the portion of the inner tube 10 facing the outer tube 20.

[0339] The heat insulation gap 1002 between the inner tube 10 and the outer tube 20 has a uniform width, which can improve the coaxiality of the outer tube 20 and the inner tube 10 and improve the circumferential temperature uniformity of the discharge region 130 .

[0340] Please refer to Figures 25 and 26. In some embodiments, the heating component 100 includes an elastic member 70. The elastic member 70 is sleeved outside the end of the outer tube 20 away from the second electrode 120, and the inner tube 10 is passed through the elastic member 70.

[0341] In this way, the elastic member 70 can securely position the inner tube 10, the conductive member 30, and the outer tube 20, improving the mechanical impact resistance of the heating assembly 100. It also ensures a high degree of coaxiality between the discharge heating center within the inner tube 10 and the outer tube 20, thereby improving the temperature uniformity around the needle body. Furthermore, the elastic member 70 can seal the open end 22, reducing the risk of discharge odor.

[0342] In some embodiments, the elastic member 70 is elastic. The elastic member 70 wraps around the outer tube 20, the conductive member 30, and the inner tube 10, forming an interference fit. The elastic member 70 covers the open end 22 of the outer tube 20, as well as the inner tube 10 and the first end 31 extending therefrom. The elastic member 70 maintains a certain distance from the arc. In some embodiments, the distance between the upper end of the elastic member 70 and the lower end of the discharge region 130 is 4 mm to 10 mm to prevent the elastic member 70 from melting due to heat. For example, the distance between the upper end of the elastic member 70 and the lower end of the discharge region 130 is 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0343] The elastic member 70 can be supported by a relatively dense elastic material. For example, a sleeve made of rubber material can be used as the elastic member 70.

[0344] Please refer to FIG. 29 . In some embodiments, the heating component 100 includes a base 90 , and the inner tube 10 is mounted on the base 90 .

[0345] In this way, the base 90 can install and fix the tubular elements in the heating component 100 to enhance the structural stability.

[0346] Specifically, the portion of the outer tube 20 exposed from the base 90 is inserted into the aerosol-forming substrate 300. The height of the outer tube 20 exposed from the base 90 ranges from 14 to 20 mm. For example, the height of the outer tube 20 exposed from the base 90 ranges from 14 mm to 18 mm, 15 mm to 19 mm, 16 mm to 17 mm, etc. For another example, the height of the outer tube 20 exposed from the base 90 ranges from 14 mm, 14.5 mm, 15 mm, 16 mm, 18 mm, and 20 mm.

[0347] In one embodiment, referring to Figures 30 and 31 , the base 90 may include a first bracket 91, a second bracket 92, and a housing 93. The first bracket 91 and the second bracket 92 engage with each other, and the housing 93 covers the outside of the first and second brackets 91 and 92. The first and second brackets 91 and 92 align with the outer diameter of the insulating member 40, securing the insulating member 40 between the first and second brackets 91 and 92. The portion of the first electrode 110 encased in the insulating member 40 that is exposed outside the inner tube 10 and the end of the inner tube 10 that includes the first end face 11 are secured within the base 90. The first and second brackets 91 and 92 align with the outer diameter of the elastic member 70, securing the end of the outer tube 20 that is proximal to the first end face 11 and the end of the conductive member 30 that includes the first end portion 31 within the base 90. A wire outlet 903 is defined in the housing 93. Referring to Figure 1 , the connection wire 33 can extend from the outlet 903 to the outside of the base 90 for connection to the power supply 200, and the temperature measurement wire 83 can also be connected to the control center 400 through the outlet 903.

[0348] In some embodiments, the first bracket 91 and the second bracket 92 may overlap each other.

[0349] Referring to FIG. 1 , an aerosol generating device 1000 according to an embodiment of the present application includes a heating component 100 according to any one of the above embodiments.

[0350] In one embodiment, the aerosol-generating device 1000 may include a battery 210 and a transformer 220. The battery 210 and the transformer 220 may constitute the power source 200 of the aerosol-generating device 1000. Referring to FIG30 , the first electrode 110 and the second electrode 120 are respectively connected to the two output terminals of the transformer 220, conducting high-voltage alternating current, forming a high-intensity electric field in the inner tube 10, thereby generating plasma, generating high temperature and heat. The heating component 100 is connected to the cover 500, and the outer tube 20 is inserted into the aerosol-forming substrate 300. Heat is transferred to the aerosol-forming substrate 300 through the inner tube 10 and the outer tube 20. The aerosol-forming substrate 300 absorbs the heat and atomizes to form an aerosol.

[0351] Throughout this specification, reference to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0352] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heating component, characterized in that: include: External pipe; a first electrode and a second electrode, wherein the first electrode and the second electrode are at least partially disposed in the outer tube, the first electrode and the second electrode are disposed opposite to each other and spaced apart, and plasma is generated between the first electrode and the second electrode when the first electrode and the second electrode are energized; and A temperature measuring component is connected to the outer tube, and is used to detect the temperature of the outer tube.

2. The heating component according to claim 1, characterized in that: The temperature measuring component comprises a temperature sensing part and a conductive part connected to the temperature sensing part, and the temperature sensing part is arranged on the outer tube.

3. The heating component according to claim 2, characterized in that: The temperature sensing portion is arranged on the outer wall or the inner wall of the outer tube.

4. The heating component according to claim 3, characterized in that: The temperature sensing portion includes a temperature sensing film attached to the outer tube.

5. The heating component according to claim 4, characterized in that: The temperature sensitive film is at least partially extended along the circumference of the outer tube.

6. The heating component according to claim 5, characterized in that: The temperature-sensitive film is in a closed ring shape, a ring shape with an opening, or a U shape.

7. The heating component according to claim 4, characterized in that: Along the axial direction of the outer tube, the width of the temperature sensitive film ranges from 0.5 mm to 1.2 mm.

8. The heating component according to claim 2, characterized in that: The resistance of the temperature sensing portion is greater than the resistance of the conductive portion.

9. The heating component according to claim 2, characterized in that: The first electrode includes a discharge end surface facing the second electrode, and the temperature sensing portion is arranged on a side of the discharge end surface away from the second electrode.

10. The heating component according to claim 9, characterized in that: Along the axial direction of the outer tube, the distance between the temperature sensing portion and the plane where the discharge end surface is located ranges from 0 mm to 2 mm.

11. The heating component according to claim 2, characterized in that: The temperature coefficient of the temperature sensitive film is greater than or equal to 300 ppm / °C.

12. The heating component according to claim 2, characterized in that: The heat generating component includes a protective layer wrapping at least one of the temperature sensing portion and the conductive portion.

13. The heating component according to claim 2, characterized in that: The number of the conductive parts is two, and the two conductive parts are arranged at intervals along the circumferential direction of the outer tube.

14. The heating component according to claim 1, characterized in that: The heating component includes an inner tube at least partially disposed in the outer tube, the first electrode is at least partially disposed in the inner tube, at least a portion of the second electrode is disposed at one end of the inner tube, and the first electrode and the second electrode are disposed oppositely and spaced apart.

15. The heating component according to claim 2, characterized in that: The temperature sensing part includes a temperature measuring probe or a thermocouple.

16. An aerosol generating device, characterized in that: It comprises the heating component described in any one of claims 1-15.

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