Heating assembly and aerosol generating device

Abstract

The invention discloses a heating assembly and an aerosol generating device. The heating assembly comprises an outer tube, a first electrode, a second electrode and a temperature measuring assembly. Wherein the first electrode and the second electrode are at least partially arranged in the outer tube, the first electrode and the second electrode are oppositely arranged at an interval, and when the first electrode and the second electrode are electrified, plasma is generated between the first electrode and the second electrode; the temperature measuring assembly is connected with the outer pipe and used for detecting the temperature of the outer pipe. According to the heating assembly, the temperature of the outer pipe is detected through the temperature measuring assembly, so that the heating assembly can adjust the voltage applied to the first electrode and the second electrode according to the temperature of the outer pipe, the heating temperature of the heating assembly is controlled, and the heating effect of the heating assembly on the aerosol forming substrate is improved.

Description

Technical Field

[0001] 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

[0002] In the related art, the aerosol generating device includes an outer tube, which can be in contact with an aerosol-forming substrate, and the aerosol generating device can heat the aerosol-forming substrate by plasma heating, so that the aerosol-forming substrate forms an aerosol. Therefore, how to improve the heating effect of the aerosol has become a technical issue of great concern. Summary of the invention

[0003] The present application provides a heating component and an aerosol generating device.

[0004] The heating component of the embodiment of the present application includes an outer tube, a first electrode, a second electrode and a temperature measuring component. At least part of the first electrode and at least part of the second electrode are arranged in the outer tube, the first electrode and the second electrode are arranged 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; the temperature measuring component is connected to the outer tube, and the temperature measuring component is used to detect the temperature of the outer tube.

[0005] 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.

[0006] 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.

[0007] In some embodiments, the temperature sensing portion is disposed on the outer wall or the inner wall of the outer tube.

[0008] In some embodiments, the temperature sensing portion includes a temperature sensing film attached to the outer tube.

[0009] In some embodiments, the temperature sensitive film is at least partially extended along the circumference of the outer tube.

[0010] In some embodiments, the temperature sensitive film is in a closed ring shape, a ring shape with an opening, or a U shape.

[0011] 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.

[0012] In some embodiments, the resistance of the temperature sensing portion is greater than the resistance of the conductive portion.

[0013] 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.

[0014] In some embodiments, 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.

[0015] In some embodiments, the temperature coefficient of the temperature sensitive film is greater than or equal to 300 ppm / °C.

[0016] In some embodiments, the heat generating component includes a protective layer wrapping at least one of the temperature sensing portion and the conductive portion.

[0017] In some embodiments, the number of the conductive parts is two, and the two conductive parts are spaced apart along the circumference of the outer tube.

[0018] In some embodiments, the heating component includes an inner tube at least partially disposed in an outer tube, a first electrode at least partially disposed in the inner tube, at least a portion of a second electrode disposed at one end of the inner tube, and the first electrode and the second electrode are disposed oppositely and spaced apart.

[0019] In some embodiments, the temperature sensing portion includes a temperature measuring probe or a thermocouple.

[0020] The aerosol generating device of the embodiment of the present application includes the heating component of any one of the above embodiments.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 is a schematic structural diagram of an aerosol generating device according to an embodiment of the present application;

[0024] Figure 2 is a schematic structural diagram of a heating component according to an embodiment of the present application;

[0025] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the heating component along the AA direction;

[0026] Figure 4 is a schematic structural diagram of a heating component according to another embodiment of the present application;

[0027] Figure 5 yes Figure 2 A schematic diagram of the structure of a temperature measuring component in a heating component;

[0028] Figure 6 yes Figure 4 A schematic diagram of the structure of a temperature measuring component in a heating component;

[0029] Figure 7 is a structural schematic diagram of a temperature measurement component in yet another embodiment of the present application;

[0030] Figure 8 yes Figure 3 A schematic diagram of the enlarged structure of part B;

[0031] Fig. 9 is a structural schematic diagram of a temperature measurement component in yet another embodiment of the present application;

[0032] Fig.10 yes Fig. 9 A schematic diagram of a combination of a temperature measuring component and a base;

[0033] Fig.11 It is a partial structural schematic diagram of a heating component according to an embodiment of the present application;

[0034] Fig.12 yes Fig.11 A schematic cross-sectional view of the heating component along the DD direction;

[0035] Fig.13 This application Fig.11 Schematic diagram of the decomposed structure of the heating component;

[0036] Fig.14 yes Fig.11 A schematic cross-sectional view of the heating component along the BB direction;

[0037] Fig.15 It is a partial structural schematic diagram of a heating component according to an embodiment of the present application;

[0038] Fig.16 is a schematic structural diagram of a conductive member according to an embodiment of the present application;

[0039] Fig.17 is a schematic structural diagram of a conductive member according to another embodiment of the present application;

[0040] Fig.18 is a schematic structural diagram of a conductive member according to yet another embodiment of the present application;

[0041] Fig.19 is a schematic structural diagram of a conductive member according to yet another embodiment of the present application;

[0042] Fig. 20 yes Fig.18 A schematic cross-sectional view of the heating component along the CC direction;

[0043] Fig.21 yes Fig. 20 A partial enlarged schematic diagram of part D;

[0044] Fig. 22 is a schematic structural diagram of a conductive member according to yet another embodiment of the present application;

[0045] Fig.23 yes Fig.16 A schematic cross-sectional view of the heat generating component along the EE direction;

[0046] Fig.24 is a schematic structural diagram of a heating component according to another embodiment of the present application;

[0047] Fig.25 is a partial schematic diagram of a heating component according to another embodiment of the present application;

[0048] Fig.26 yes Fig.25 A schematic cross-sectional view of the heating component along the FF direction;

[0049] Fig. 27 yes Fig.26 A partial cross-sectional enlarged schematic diagram of a heating component;

[0050] Fig.28 yes Fig.26 A partial enlarged schematic diagram of part G;

[0051] Fig.29 is a schematic structural diagram of a heating component according to another embodiment of the present application;

[0052] Fig.30 yes Fig.29 A schematic cross-sectional view of the heating component along the HH direction;

[0053] Fig.31 yes Fig.29 Schematic diagram of the exploded structure of the heat generating components.

[0054] Description of reference numerals:

[0055] Aerosol generating device 1000, power source 200, battery 210, transformer 220, aerosol forming matrix 300, control center 400, cover 500;

[0056] Heating component 100, inner tube 10, outer peripheral surface 1001, first tube section 101, second tube section 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 area 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 member 40, first insulating portion 41, second insulating portion 42, through hole 421, joint 50, infrared radiation film 60, thermal insulation gap 1002, elastic member 70, temperature measuring component 80, temperature sensing portion 81, conductive portion 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

[0057] 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 cannot be understood as limiting the present application.

[0058] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0059] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0061] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0062] See also Figure 1 The present application provides a heating component 100 and an aerosol generating device 1000. The heating component 100 is used to heat an aerosol generating matrix 300 using plasma to form an aerosol in the aerosol generating device 1000. The aerosol generated in the aerosol generating device 1000 can be used for various purposes such as food, medicine, and industrial production.

[0063] See also Figure 2 and Figure 3The heating component 100 of the embodiment of the present application includes an outer tube 20, a first electrode 110, a second electrode 120 and a temperature measuring component 80. The first electrode 110 and the second electrode 120 are at least partially disposed in the outer tube 20, the first electrode 110 and the second electrode 120 are at least partially opposite and spaced apart, and plasma is generated between the first electrode 110 and the second electrode 120 when power is supplied therebetween; the temperature measuring component 80 is connected to the outer tube 20, and is used to detect the temperature of the outer tube 20.

[0064] 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.

[0065] Plasma is a form of matter that contains a large number of charged particles and neutral atoms and molecules, and maintains electrical neutrality as a whole. Plasma can be generated by gas ionization 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.

[0066] Specifically, the outer tube 20 is a hollow tube, which is covered outside the first electrode 110 and the second electrode 120. The first electrode 110 and the second electrode 120 are opposite to each other inside the outer tube 20 and are spaced apart by a predetermined distance. The area between the first electrode 110 and the second electrode 120 that is opposite to each other and spaced apart may be a discharge area 130, and the first electrode 110 and the second electrode 120 discharge and form plasma in the discharge area 130. The inner wall of the outer tube 20 covers the discharge area 130, and the outer wall of the outer tube 20 may directly contact the aerosol-forming substrate 300.

[0067] Please combine Figure 1 The outer tube 20 may 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 may be closed and protrude outward to form a relatively sharp tapered end 21. The end of the outer tube 20 opposite to the tapered end 21 along the axial direction has an opening 230, and the end of the outer tube 20 having the opening 230 is an open end 22.

[0068] The first electrode 110 and the second electrode 120 can extend into the outer tube 20 from the opening 230, and the second electrode 120 at least partially extends into the tapered end 21, and the portion of the first electrode 110 extending into the outer tube 20 is away from the tapered end 21 relative to the second electrode 120. The first electrode 110 can be cylindrical and substantially coaxial with the outer tube 20, and one end of the first electrode 110 in the axial direction of the outer tube 20 is opposite to at least a portion of the second electrode 120, and is a discharge end 111. The other end of the first electrode 110 in the axial direction of the outer tube 20 can be a conductive end 112, and can be partially exposed outside the outer tube 20 from the opening 230.

[0069] It should be noted that the first electrode 110 and the second electrode 120 can be connected to 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 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 plasma.

[0070] The outer tube 20 can transfer the heat of the discharge region 130 to the aerosol-forming substrate 300 in the form of infrared radiation and heat transfer. The temperature of the outer tube 20 increases under the influence of the high temperature of the plasma in the discharge region 130. Depending on the type of the aerosol-forming substrate 300, a good heating atomization effect can be obtained by stabilizing the temperature of the outer tube 20 at 200° C. to 350° C., and a long-term temperature of the outer tube 20 exceeding 350° C. can easily lead to gelatinization and carbonization of the aerosol-forming substrate 300.

[0071] The temperature measuring component 80 is connected to the outer tube 20 and can detect the temperature data of the outer tube 20 in real time. Figure 1 In some embodiments, the temperature measuring component 80 is connected to the control center 400, and the temperature measuring component 80 transmits the detected temperature data of the outer tube 20 to the control center 400. When the temperature is too high or insufficient, 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 120120 to adjust the heating temperature.

[0072] Please continue reading Figure 2 and Figure 3 In some embodiments, the temperature measuring component 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 .

[0073] In this way, the temperature sensing part 81 is connected to the circuit through the conductive part 82 , so that the temperature of the outer tube 20 can be obtained by detecting the resistance value of the temperature sensing part 81 in the circuit.

[0074] Specifically, the temperature sensing portion 81 is a 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 may be located between the two ends of the outer tube 20 in the axial direction and in direct contact with the outer tube 20. The portion of the outer tube 20 in contact with the temperature sensing portion 81 is the target area for the temperature measuring component 80 to detect the temperature. The conductive portion 82 may 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 may 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 may be different parts of an integrally formed component, or may be two different components in contact and connected.

[0075] The conductive part 82 can be used as an electrode, electrically connected to the temperature sensing part 81 and the control center 400 to form a conductive loop. The conductive part 82 can be connected to the control center 400 through a welding lead or a conductive spring. The control center 400 can measure the change in the resistance value of the temperature sensing part 81 by detecting the change in the voltage in the circuit, and then calculate the temperature of the measured target area.

[0076] The direction from the tapered end 21 to the open end 22 along the axial direction of the outer tube 20 is the direction 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, and the distance between the lower end of the conductive portion 82 and the end surface of the open end 22 ranges from 0.3 mm to 3 mm. In this way, the conductive portion 82 can be prevented 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.

[0077] See also Figure 2 and Figure 4 In some embodiments, the temperature sensing portion 81 is disposed on the outer wall or the inner wall of the outer tube 20 .

[0078] In this way, the temperature sensing portion 81 can effectively sense the heating temperature of the aerosol-forming substrate 300 by the outer tube 20, so that the temperature control of the heating component 100 is more accurate.

[0079] 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 matrix 300. The temperature sensing portion 81 may also be disposed inside the outer tube 20 and connected to the inner wall surface of the outer tube 20.

[0080] 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.

[0081] In some embodiments, the wall thickness of the outer tube 20 ranges from 0.3 mm to 0.5 mm (including the endpoint values). 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., and 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.

[0082] See also Figure 4-Figure 7 In some embodiments, the temperature sensing portion 81 includes a temperature sensing film 84 attached to the outer tube 20 .

[0083] 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 .

[0084] Specifically, the temperature-sensitive film 84 can be plated on the outer wall or inner wall surface of the outer tube 20, and various patterns can be formed on the wall surface 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 wave shape, etc. The temperature-sensitive film 84 is tightly fitted with 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 by heat transfer. It can be understood that by increasing the contact area between the temperature-sensitive film 84 and the outer tube 20, the heat absorbed by the temperature-sensitive film 84 per unit volume from the outer tube 20 is also increased, thereby improving the sensitivity of the temperature-sensitive film 84 to sense the temperature of the outer tube 20.

[0085] The temperature-sensitive film 84 may be made of a resistive material having conductive properties, for example, the temperature-sensitive film 84 may be made of at least one of platinum, gold, silver, chromium, nickel, and alloy materials containing platinum, gold, silver, chromium, and nickel.

[0086] In some embodiments, the conductive portion 82 can be made of the same material as the temperature sensing film 84 and attached to the outer wall of the outer tube 20. The film layers of the conductive portion 82 and the temperature sensing portion 81 can be formed by integrated plating, such as Figure 6 As shown. The conductive part 82 can also be made of a different material from the temperature-sensitive film 84, and become a separate component, which is in contact with and connected to the temperature-sensitive film 84. The conductive part 82 can be in a variety of shapes or irregular patterns, such as a rectangle, a cone, a trapezoid, etc. For example, Figure 7 As shown, the width of the conductive portion 82 in the circumferential direction of the outer tube 20 gradually decreases in the direction close to the temperature sensing portion 81, and the conductive portion 82 is roughly trapezoidal. The width of the end of the conductive portion 82 away from the temperature sensing 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.

[0087] Please refer again Figure 2 and Figure 4 In some embodiments, the temperature sensitive film 84 is at least partially extended along the circumference of the outer tube 20 .

[0088] This is beneficial for the temperature-sensitive film 84 to measure the average value of the circumferential temperature of the outer tube 20 , thereby improving the temperature measurement accuracy.

[0089] Specifically, the temperature-sensitive film 84 can be plated on the outer tube 20 at a distance of 3mm-14mm from the top of the tapered end 21 in the axial direction of the outer tube 20, and fit the outer circumference of the outer tube 20 and fit closely with the outer wall of the outer tube 20. The upper end of the conductive part 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 2mm-8mm along the circumference of the outer tube 20, that is, the circumference of the temperature-sensitive film 84 can range from 2mm to 8mm along the circumference of the outer tube 20. The outer circumference of the outer tube 20 is greater than or equal to the circumference of the temperature-sensitive film 84. The number of conductive parts 82 can be two, respectively connected to the two ends of the temperature-sensitive film 84 in the circumferential direction of the outer tube 20. The conductive part 82 can also be connected to the temperature-sensitive film 84 between the two ends of the temperature-sensitive film 84 in the circumferential direction of the outer tube 20.

[0090] See also Figure 5 and Figure 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.

[0091] In this way, the temperature sensing film 84 is in a ring pattern, and the average value of the circumferential temperature of the outer tube 20 can be collected, thereby improving the accuracy of temperature measurement.

[0092] In some embodiments, Figure 5 As shown, the temperature-sensitive film 84 is arranged around the circumference of the outer tube 20, forming a circle of shielding on the circumference of the outer tube 20. The temperature-sensitive film 84 is in a closed annular shape, and the circumference of the temperature-sensitive film 84 is equal to the outer circumference of the outer tube 20. Two conductive parts 82 connected to the temperature-sensitive film 84 can be provided, and the two conductive parts 82 can be spaced in the circumferential direction of the outer tube 20 and extend downward 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 parts 82 and the temperature-measuring film as the boundary. In the closed temperature measurement loop formed by the conductive part 82 and the temperature-sensitive film 84, the left and right semicircles of the temperature-sensitive film 84 divided by the conductive part 82 as the boundary are in a parallel relationship.

[0093] In some embodiments, Figure 6As shown, the temperature-sensitive film 84 is arranged around the circumference of the outer tube 20, and a ring with an opening is formed on the circumference of the outer tube 20. The ring with an opening can be a semicircular ring, a two-thirds circular ring, a semi-elliptical ring, etc. For example, the cross-sectional shape of the temperature-sensitive film 84 can be "U"-shaped or approximately "U"-shaped. The temperature-sensitive film 84 does not cover the outer tube 20 at the annular opening, and the circumference of the temperature-sensitive film 84 is smaller than the outer circumference of the outer tube 20. The conductive part 82 and the temperature-sensitive film 84 form a single-line series temperature measurement loop.

[0094] It should be noted that the present application does not limit the shape of the temperature-sensitive film 84 to a ring shape, and the temperature-sensitive film 84 may be a circular ring, an elliptical ring, a ring formed by splicing multiple arc segments, etc. The temperature-sensitive film 84 may also be in a strip shape, a square shape, or a combination of multiple shapes on the outer tube 20 in an irregular pattern.

[0095] See also Figure 3 and Figure 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 (including the end points).

[0096] 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 to improve the temperature measurement accuracy.

[0097] Specifically, the width of the temperature-sensitive film 84 in the axial direction of the outer tube 20 may be uniform, for example, the width f of the temperature-sensitive film 84 may be 0.5 mm, 0.6 mm, 0.7 mm, 0.85 mm, 1.0 mm, 1.1 mm, 1.2 mm. In some embodiments, the width of the temperature-sensitive film 84 in the axial direction of the outer tube 20 may also be uneven, for example, the width f of the temperature-sensitive film 84 may also be 0.5 mm-1.2 mm, 0.6 mm-1.0 mm, 0.7 mm-0.9 mm, etc., and may vary between the two end values ​​of the above width range.

[0098] In some embodiments, the resistance of the temperature sensing portion 81 is greater than the resistance of the conductive portion 82 .

[0099] 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.

[0100] Specifically, in the conduction loop where the temperature sensing part 81 and the conductive part 82 are located, the resistance value of the temperature sensing part 81 is large, and the electromotive force difference of the temperature sensing part 81 is also large. As described above, the control center 400 obtains the resistance change of the temperature sensing part 81 by measuring the voltage. It can be understood that the resistance of the temperature sensing part 81 is greater than the resistance of the conductive part 82, which can increase the voltage change of the temperature sensing part 81, thereby improving the temperature measurement accuracy. In some embodiments, the ratio of the resistance value of the temperature sensing part 81 to the resistance value of the conductive part 82 is greater than or equal to 2.

[0101] According to the factors affecting the change of conductor resistance, the resistance of the temperature sensing part 81 can be made greater than the resistance of the conductive part 82 by reasonably configuring the materials, length, width, conductor cross-sectional area, etc. of the temperature sensing part 81 and the conductive part 82. For example, see Figure 8 The temperature sensing portion 81 and the conductive portion 82 are both temperature measuring films, and the thickness of the temperature sensing portion 81 is smaller than that of the conductive portion 82 .

[0102] See also Figure 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 .

[0103] 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 .

[0104] Specifically, the discharge end surface 1104 is the position on the first electrode 110 that is shortest from the second electrode 120, and is opposite to the second electrode 120 and spaced at a predetermined distance. 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 the direction from top to bottom. The second electrode 120 is located above the first electrode 110, limiting the upper boundary of the discharge region 130, and the discharge end surface 1104 limits the lower boundary of the discharge region 130. The first electrode 110 and the second electrode 120 are connected to high voltage electricity, and discharge generates plasma in the discharge region 130, that is, in the interval above the discharge end surface 1104, so that heat is concentrated in the interval below the second electrode 120 and above the discharge end surface 1104. The temperature sensing portion 81 is arranged below the discharge end surface 1104, that is, on the side of the discharge end surface 1104 away from the second electrode 120, so that the temperature of the temperature sensing portion 81 is not too high.

[0105] See also Figure 8 In some embodiments, along the axial direction of the outer tube 20, the 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 (including the end point values).

[0106] 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 , and the temperature response of the temperature sensing portion 81 and the discharge area 130 is basically synchronized, with low delay and good temperature measurement accuracy.

[0107] Specifically, the temperature sensing portion 81 is located on a side of the discharge end surface 1104 away from the second electrode 120, and along the axial direction of the outer tube 20, the distance i between the temperature sensing portion 81 and the plane where the discharge end surface 1104 is located is less than or equal to 2 mm. The distance i between the temperature sensing portion 81 and the plane where the discharge end surface 1104 is located can be considered as the distance between the upper edge of the temperature sensing portion 81 and the plane where the vertex of the discharge end surface 1104 is located in the axial direction of the outer tube 20. Exemplarily, the distance i between the temperature sensing portion 81 and the plane where the discharge end surface 1104 is located 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.

[0108] 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.

[0109] In some embodiments, the temperature coefficient of the temperature sensitive film 84 is greater than or equal to 300 ppm / °C.

[0110] Thus, by selecting the temperature-sensitive film 84 with a larger temperature coefficient, the temperature of the temperature-sensitive portion 81 can be improved.

[0111] Specifically, the temperature coefficient of resistance (TCR) indicates the relative change of the resistance value when the temperature changes by 1 degree, and the unit is ppm / ℃ (i.e. 10E(-6) / ℃). The temperature coefficient of the temperature-sensitive film 84 is greater than or equal to 300ppm / ℃. When the temperature changes by 1 degree, the change of the resistance value of the temperature-sensitive film 84 is 300x10 -6 The temperature sensing film 84 has a TCR characteristic, which may be a positive correlation between the resistance value and the temperature change, that is, the resistance value of the temperature sensing film 84 increases with the increase of temperature, or a negative correlation between the resistance value and the temperature change, that is, the resistance value of the temperature sensing film 84 decreases with the increase of 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 relevant signals, which may be detected The voltage change at both ends of the temperature measurement circuit caused by the change of resistance value can be calculated, so that the surface temperature of the target area of ​​the outer tube 20 corresponding to the temperature sensing film 84 can be calculated.

[0112] See also Fig. 9and 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 .

[0113] 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 .

[0114] Specifically, the protective layer 85 can be arranged 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 outer tube 20 section 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 dip coating 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.

[0115] See also Figure 5 and Figure 6 In some embodiments, the number of the conductive parts 82 is two, and the two conductive parts 82 are arranged at intervals along the circumference of the outer tube 20.

[0116] In this way, the temperature-sensitive film 84 and the conductive part 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.

[0117] Specifically, one conductive part 82 extends upward from the lower end temperature measuring wire 83 pin along the outer tube 20 to 3mm-14mm away from the vertex of the tapered end 21, and is connected to the temperature sensing film 84. The temperature sensing film 84 extends 2mm-8mm along the circumference of the outer tube 20 in a single line or in parallel in double lines, connects to another conductive part 82 and then extends downward along the axial direction of the outer tube 20 to another temperature measuring wire 83 pin at the lower end of the outer tube 20. The conductive part 82 extends downward along the axial direction of the outer tube 20 to 0.3mm-3mm away from the end face of the opening 230. The two conductive parts 82 can form a temperature measurement circuit of a ring-shaped parallel or U-shaped single-segment line with the temperature sensing film 84. The two conductive parts 82 are spaced apart on the outer circumferential surface of the outer tube 20, and the distance between the two conductive parts 82 along the circumference of the outer tube 20 can be 2mm-8mm.

[0118] In some embodiments, the upper end of the conductive portion 82 may also extend above the discharge end surface 1104 .

[0119] The charged part of the temperature measuring component 80, including the conductive part 82 and the temperature sensing film 84, is as far away from the first electrode 110, the second electrode 120, and the conductive element connecting the first electrode 110 / the second electrode 120 and the power supply 200 as possible to reduce high-voltage crosstalk. Exemplarily, the linear distance between the conductive part 82, the temperature measuring wire 83, the conductive member 30 connected to the second electrode 120, and the connecting wire 33 is greater than 0.5 mm.

[0120] The material of the conductive part 82 may be a metal material with high conductivity, and specifically may include one or more of gold, silver, platinum, and copper.

[0121] Please refer again Figure 3 In some embodiments, the heating component 100 includes an inner tube 10 at least partially disposed in the outer tube 20, a first electrode 110 is at least partially disposed in the inner tube 10, at least a portion of the second electrode 120 is disposed at one end of the inner tube 10, and the first electrode 110 and the second electrode 120 are disposed opposite to each other and spaced apart.

[0122] In this way, the inner tube 10 can form insulation protection for the first electrode 110 and the second electrode 120, and the first electrode 110 and the second electrode 120 can be installed and limited by the inner tube 10, which is conducive to the coaxialization and miniaturization of the heating component 100. Specifically, the outer tube 20 is sleeved outside the inner tube 10. The inner tube 10 is a through tube, and both ends along its own axial direction have openings, and the openings penetrate the inner tube 10 in the axial direction. The second electrode 120 can be disc-shaped and buckled with one end of the inner tube 10 to cover the opening of the end face. The first electrode 110 can be columnar and extend into the inner tube 10 from one end of the inner tube 10 away from the second electrode 120, so that part of the first electrode 110 is covered by the inner tube 10. One 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 area 130 can be an interval in the inner tube 10 where the first electrode 110 and the second electrode 120 are opposite and spaced.

[0123] One 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 against the tapered end 21. One end of the inner tube 10 away 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 joint 50, and the joint 50 is connected to the wire 113 and connected to the power source 200 through the wire 113.

[0124] In some embodiments, the temperature sensing unit 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.

[0125] In some embodiments, the thermocouple or temperature probe of the temperature sensing portion 81 is arranged to be close to 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 arranged between the inner wall of the outer tube 20 and the outer wall of the inner tube 10, and mainly contacts the inner wall of the outer tube.

[0126] See also Figure 11-13 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 .

[0127] In this way, the conductive member 30 can facilitate the second electrode 120 to be connected to high voltage electricity, and 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.

[0128] In some embodiments, the conductive member 30 is connected to the second electrode 120 for being electrically connected to the power source 200. The conductive member 30 extends 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. Along the axial direction of the inner tube 10, the pipe section of the inner tube 10 corresponding to the conductive member 30 partially faces the outer tube 20.

[0129] 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 are 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 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 the present 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.

[0130] 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 through the inner tube 10 and the outer tube 20 to the aerosol-forming matrix 300, thereby improving the heat utilization rate and the heating rate and efficiency of the aerosol-forming matrix 300.

[0131] It can be understood that the pipe section corresponding to the inner pipe 10 and the conductive member 30 partially faces the outer pipe 20, which means that the pipe section corresponding to the inner pipe 10 and the conductive member 30 has a portion of the outer wall facing the outer pipe 20, and the portion of the outer wall and the outer pipe 20 are not blocked by the conductive member 30. On the same pipe section, the inner pipe 10 has another portion of the outer wall facing the outer pipe 20, but the portion of the outer wall is blocked by the conductive member 30 and cannot directly face the outer pipe.

[0132] For details, please refer to Fig.13 The inner tube 10 may be a hollow tube with openings at both ends. The inner tube 10 may be cylindrical as a whole and have a central axis 1011. The length of the inner tube 10 in the axial direction is much greater than the length in the radial direction. The side of the inner tube 10 surrounds the central axis 1011 of the inner tube 10 to form the wall of the inner tube 10 and the hollow space of the inner tube 10.

[0133] See also Fig.12 At least a portion of the first electrode 110 is inserted from one end of the inner tube 10 along the axial direction of the inner tube 10 into the hollow space at the center of the inner tube 10. Fig.12 As shown, the position where the first electrode 110 is exposed from the inner tube 10 is marked as P. The second electrode 120 is disposed at the other end of the inner tube 10 , and is opposite to the portion of the first electrode 110 inserted into the inner tube 10 through the hollow space of the inner tube 10 .

[0134] A certain distance is between the end of the first electrode 110 inserted into the inner tube 10 and the second electrode 120. For ease of description, in this application, the interval between the first electrode 110 and the second electrode 120 is referred to as a discharge zone 130. The discharge zone 130 can be wrapped by the inner tube 10 and is located in the hollow space of the inner tube 10.

[0135] Please continue reading Fig.12 , combined with Figure 1 As shown, the first electrode 110 can be connected to the power supply 200 to conduct one pole of the high voltage electricity; the second electrode 120 can be connected to the power supply 200 through the conductive member 30 to conduct 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 is performed in the discharge area 130 to generate a plasma arc. In the center of the discharge area 130, the maximum temperature when the plasma arc is generated can reach more than 2000°C, and the stable plasma temperature range can be 1000°C to 1600°C. The discharge area 130 can be sealed and filled with an electrically neutral gas, such as nitrogen, argon, etc. The discharge area 130 can also be connected to the atmospheric pressure. At this time, the gas in the discharge area 130 is air.

[0136] See also Fig.11 and Fig.12The outer tube 20 is sleeved outside the inner tube 10, wrapping at least a portion of the inner tube 10. The outer tube 20 can at least cover the discharge region 130 in the inner tube 10. The aerosol-forming matrix 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 matrix 300. The heat generated by the plasma arc in the discharge region 130 can be transmitted to the outer side of the outer tube 20 through the inner tube 10, the conductive member 30 and the outer tube 20 in the form of infrared radiation and heat transfer, so that the aerosol-forming matrix 300 absorbs heat to form an aerosol.

[0137] The inner tube 10 wraps at least a portion of the first electrode 110, and one end of the inner tube 10 including the second end surface 12 is inserted into the outer tube 20 from the open end 22, so that the second electrode 120 disposed on the second end surface 12 abuts against the inner wall surface 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, close to the tapered end 21. The first end 31 can extend from the open end 22 to the outside of the outer tube 20.

[0138] The conductive member 30 may be disposed on the inner tube 10, extending 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 path along which the conductive member 30 extends between the two ends of the inner tube 10 may be a straight line or a curve. The outer wall of the portion of the inner tube 10 wrapped by the outer tube 20 faces the inner wall of the outer tube 20.

[0139] The conductive member 30 may be attached to the outer wall of the inner tube 10, located between the outer wall of the inner tube 10 and the inner wall of the outer tube 20, and cover part of the outer circumference of the inner tube 10. The part 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, the heat of the plasma arc may be transmitted to the aerosol-forming substrate 300 through the inner tube 10, the conductive member 30 and the outer tube 20. The infrared radiation energy of this part is much less than that of the part not blocked by the conductive member 30.

[0140] It is understandable that the conductive member 30 may be a metal member disposed on the outer wall of the inner tube 10. In other embodiments, the conductive member 30 may 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 may be understood in the same manner as the above-mentioned solution.

[0141] 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 a portion of its outer wall and the inner wall of the outer pipe 20 .

[0142] Please refer again Figure 12-14In 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 be electrically connected to the power source 200 .

[0143] The conductive member 30 may be arranged between the first end 31 and the second end 32 along the axial direction of the inner tube 10. The first end 31 is the end of the conductive member 30 extending to the outer tube 20, which 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 may surround the second electrode 120, or contact the second electrode 120 in other ways, and is disposed at one end of the inner tube 10 and electrically connected to the second electrode 120.

[0144] Along the axial direction of the inner tube 10 , the direction from the second end 32 to the first end 31 may be a direction from top to bottom. The pipe section of the inner tube 10 corresponding to the conductive member 30 may be a pipe section between the first end 31 and the second end 32 .

[0145] For example, the second end portion 32 may be cylindrical, coaxial with the inner tube 10 , and surround and wrap one end of the inner tube 10 . The tube section of the inner tube 10 wrapped by the second end portion 32 cannot face the outer tube 20 .

[0146] See also 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 peripheral surface 1001 , and the area of ​​the outer peripheral surface 1001 opposite to the conductive member 30 is smaller than the total area of ​​the outer peripheral surface 1001 .

[0147] In this way, the area between 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 section corresponding to the inner tube 10 and the conductive member 30 is at least partially not blocked by the conductive member 30 and directly faces 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.

[0148] Specifically, 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 second end face 12 is against a side surface of the second electrode 120. The entire tube section of the inner tube 10 may be between the first end face 11 and the second end face 12. The second end 32 is disposed on the second end face, and the first end 31 may be located between the first end face 11 and the second end face 12. The tube section corresponding to the inner tube 10 and the conductive member 30 is a partial tube section between the second end 32 and the first end 31.

[0149] The outer circumferential surface 1001 of the corresponding pipe section of the inner tube 10 and the conductive member 30 extends from the second end face 12 to the first end face along the axial direction of the inner tube 10 to the position where the first end 31 is located. It can be understood that the area of ​​the outer circumferential surface 1001 of the corresponding pipe 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 multiplied by the distance between the first end 32 and the second end 31 in the axial direction of the inner tube 10.

[0150] The conductive member 30 can be attached to the inner tube 10. For example, the conductive member 30 is formed on the inner tube 10 by coating, and at least a portion of the outer circumference 1001 of the inner tube 10 is opposite to the conductive member 30. The outer circumference 1001 of the inner tube 10 opposite to 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 where the outer circumference 1001 faces the conductive member 30 is the area where the conductive member 30 shields the inner tube 10 between the inner tube 10 and the outer tube 20.

[0151] Please continue reading 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 peripheral surface 1001 , and the conductive member 30 partially covers the outer peripheral surface 1001 .

[0152] 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 tube section corresponding to the inner tube 10 and the conductive member 30 is partially covered by the conductive member 30. The conductive member 30 can be an extension path extending along the axial direction of the inner tube 10 on the outer circumferential surface 1001 of the inner tube 10, extending from the first end surface 11 to the second end surface 12 and forming a straight strip. The extension path of the conductive member 30 on the outer circumferential surface 1001 of the inner tube 10 can also be a curve protruding toward the outer tube 20 around the central axis 1011 of the inner tube 10. The extension path of the conductive member 30 covers part of the outer circumferential surface 1001 of the inner tube 10.

[0153] See also Fig.11 and Fig.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. The first electrode 110 is at least partially inserted into the first tube segment 101. The second electrode 120 is disposed at one end of the second tube segment 102 away from the first tube segment 101, opposite to the first electrode 110 and spaced apart. The second electrode 120 and the first electrode 110 are controlled to generate plasma at least in the second tube segment 102, and the outer peripheral surface of the first tube segment 101 partially faces the outer tube 20.

[0154] It should be noted that in the present 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 molded 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 separate.

[0155] Specifically, the first pipe segment 101 may be a partial pipe segment along the axial direction of the inner pipe 10 from the first end portion 31 to one end of the first electrode 110 toward the second electrode 120. The second pipe segment 102 may be a partial pipe segment along the axial direction of the inner pipe 10 from one end of the first electrode 110 toward the second electrode 120 to the second end surface 11.

[0156] The second electrode 120 is disposed at one end of the second tube segment 102 including the second end surface 12. The second electrode 120 and the first electrode 110 are controlled to generate plasma in the second tube segment 102, so the discharge region 130 is located in the second tube segment 102.

[0157] The conductive member 30 is connected to the second electrode 120 at the second tube segment 102, and extends from the second tube segment 102 to the first tube segment 101, extending from the open end 22 to the outside of the outer tube 20. The path of the conductive member 30 extending from the second tube segment 102 to the first end surface 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.

[0158] See also 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 .

[0159] Combination Fig.11 The upper part of the heating component 100 is inserted into the aerosol-forming matrix 300, and the upper part of the heating component 100 includes a discharge area 130. The lower part of the heating component 100 can be used for installation and fixing. In the related art, the heat generated in the discharge area is easily transmitted to the lower part of the heating component through the conductive member, resulting in an excessively high temperature at the lower part of the heating component, a large waste of energy efficiency, and a large amount of oil accumulation.

[0160] Thus, by providing the hollow portion 35 on the conductive member 30, the heat of the conductive member 30 can be prevented from being transferred from the discharge area 130 to the lower part of the heating component 100, thereby preventing the lower part of the heating component 100 from being too high in temperature, improving the heat utilization rate of the heated aerosol-forming matrix 300, and reducing the deposition of condensate. The hollow portion 35 is also conducive to improving the intensity of the plasma arc radiation to the outside.

[0161] See also Fig.11 and Fig.14, the heating component 100 generates a plasma arc through discharge between the first electrode 110 and the second electrode 120 to heat the aerosol-forming substrate 300. In the center of the discharge area 130, the maximum temperature of the plasma arc can reach 2000°C, and the heat is relatively concentrated. It can be understood that the heat capacity of the heating component 100 should be minimized so that the discharge area 130 is not easy to store heat, and the heat can be quickly transferred to the aerosol-forming substrate 300. At the same time, the heating component 100 should reduce the heat transfer to other parts outside the aerosol-forming substrate 300.

[0162] See also Fig.11 and Fig.15 In some embodiments, the conductive member 30 is tubular and sleeved outside the inner tube 10, and the first end 31 and the second end 32 are two axial ends of the conductive member 30. The first end 31 surrounds the outer circumference of the first end surface 11, and the second end 32 extends from the open end 22 and is partially located outside the outer tube 20. The hollow portion 35 is located between the first end 31 and the second end 32, and 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.

[0163] See also Fig.14 and Fig.15 In some embodiments, the conductive member 30 is sleeved outside the inner tube 10, and can be cylindrical in the second tube segment 102, covering at least a portion of the second tube segment 102. The discharge region 130 is located in the second tube segment 102, and the heat of the discharge region 130 can be transferred to the aerosol-forming substrate 300 through the second tube segment 102, the conductive member 30 and the outer tube 20. The hollow portion 35 extends from the end surface of the first electrode 110 toward the second electrode 120 to the second end portion 32. The outer peripheral surface of the first tube segment 101 faces the inner wall of the outer tube 20 through the hollow portion 35. The heat generated by the discharge region 130 is difficult to be transferred downward through the hollow portion 35.

[0164] 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 the heat conduction is uniform.

[0165] 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.

[0166] See also Fig.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 tube, covering the first tube section 101 and the second tube section 102. There is a certain interval between the wires to form a hollow portion.

[0167] 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 may be of the same shape or of different shapes.

[0168] See also Fig.17 In some embodiments, there are multiple hollow portions 35 , and the multiple hollow portions 35 are arranged at intervals along the circumference of the inner tube 10 .

[0169] 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 .

[0170] Specifically, the conductive member 30 may form a hollow portion 35 between the first end portion 31 and the second end portion 32. The plurality of hollow portions 35 are formed by a plurality of conductive strips 34. The plurality of conductive strips 34 may be distributed at intervals along the circumference of the inner tube 10 on the outer circumferential surface 1001 of the inner tube 10.

[0171] See also Fig.17 and Fig.18 In some embodiments, the conductive strips 34 and the hollow portions 35 are arranged in parallel on the outer circumferential surface of the first tube segment 101 , extend along the axial direction of the first tube segment 101 , and are arranged at intervals along the circumferential direction of the first tube segment 101 .

[0172] In some embodiments, see 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.

[0173] 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 utilization efficiency of the heat generation.

[0174] Exemplarily, 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.

[0175] 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.

[0176] It can be understood that as the wall thickness of the conductive member 30 increases, the volume increases accordingly, and the amount of heat that can be absorbed and stored also increases, thereby increasing the heat capacity of the heating component 100. The wall thickness of the conductive member 30 is less than or equal to 0.2 mm, and it is not easy to store heat, which is conducive to the conductive member 30 transferring the heat of the discharge area 130 to the aerosol-forming matrix 300. The wall thickness of the conductive member 30 is greater than or equal to 0.05 mm, and it is not easy to wear out and fail.

[0177] In some embodiments, the conductive member 30 is made of an oxidation-resistant metal material, which can prevent the conductive member 30 from oxidation failure and improve the service life. Specifically, the conductive member 30 is made of at least one of a nickel-based alloy and an iron-based alloy.

[0178] See also Fig.17 and Fig.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, a portion of the first tube segment 101 is exposed through the first hollow portion 351 and faces the outer tube 20, and the hollow portion 35 includes the first hollow portion 351.

[0179] So, combined Fig.11 The first hollow portion 351 cuts off a path for transferring heat from part of the first conductive portion 301 to a region away from the aerosol-forming substrate 300 , thereby reducing heat waste.

[0180] Specifically, the first hollow portion 351 may be formed by cutting on the tube wall of the first conductive portion 301. The first hollow portion 351 may be in a strip shape. The number of the first hollow portions 351 may be one or more.

[0181] For example, see Fig.19 In some embodiments, the number of the conductive strip 34 of the first tube segment 101 is one. One 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.

[0182] For example, see Fig.12 and Fig.18 In some embodiments, the number of the conductive strips 34 of the first tube section 101 is two, and the two conductive strips 34 can be distributed at both ends of the same diameter of the inner tube 10, and two hollow portions 35 are formed at intervals. The outer wall of the inner tube 10 faces the inner wall of the outer tube 20 through the hollow portions 35.

[0183] Please refer again 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 along the axial direction of the first tube segment 101, and the plurality of first conductive strips 341 are arranged at intervals along the circumferential direction of the first tube segment 101. A first hollow portion 351 is formed between two adjacent first conductive strips 341.

[0184] In this way, the plurality of first conductive strips 341 may be spaced apart to form a plurality of first hollow portions 351 , thereby reducing downward heat transfer of the first conductive portion 301 .

[0185] Specifically, the plurality of first conductive strips 341 may extend from the first end portion 31 to the end surface opposite to the first electrode 110 and the second electrode 120. Among the plurality of first conductive strips 341, the area of ​​the outer peripheral surface of the first tube segment 101 covered by each first conductive strip 341 may 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 to form hollow portions 35 of equal size. The intervals between two adjacent first conductive strips 341 may also be unequal.

[0186] 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 .

[0187] See also Figure 17-Figure 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 pipe segment 102 .

[0188] In this way, the plasma arc generated in the second pipe segment 102 can be covered by the second conductive portion 302, thereby improving the utilization rate of heat radiation.

[0189] 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.

[0190] In some embodiments, the second conductive portion 302 is columnar and coaxial with the second tube segment 102 .

[0191] As mentioned above, the discharge zone 130 is between the end of the first electrode 110 extending into the inner tube 10 and the second electrode 120. The first electrode 110 and the second electrode 120 conduct high voltage electricity to generate a plasma arc in the discharge zone 130. In the following description, L will be used to indicate the arc length of the plasma arc generated by the first electrode 110 and the second electrode 120, that is, the discharge arc length.

[0192] It can be understood that the discharge 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 discharge arc length can be a fixed value.

[0193] See also 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.

[0194] 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.

[0195] 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 more 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 in the inner tube 10, and the length of the inner tube 10 is obviously greater than the discharge arc length. The outer tube 20 is sleeved outside 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 body end covering the discharge region 130.

[0196] In some embodiments, the discharge arc length between the second electrode 120 and the first electrode 110 is 6 mm<L≤10 mm.

[0197] 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.

[0198] In some embodiments, the discharge arc length L between the second electrode 120 and the first electrode 110 is 8 mm.

[0199] The second conductive portion 302 covers the second tube segment 102 , and the length extending in the axial direction of the second tube segment 102 is greater than the discharge arc length L, so that the length of the plasma arc does not exceed the second conductive portion 302 .

[0200] See also Fig. 20 and Fig.21In some embodiments, along the axial direction of the inner tube 10, the second conductive portion 302 overlaps with the end of the first electrode 110 facing the second electrode 120. In the following description, n will be used to indicate the size of the second conductive portion 302 overlapping with the end of the first electrode 110 facing the second electrode 120.

[0201] 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.

[0202] 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 direction from top to bottom, 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 second conductive portion 302 overlaps with the end of the first electrode 110 facing the second electrode 120 in the axial direction of the inner tube 10, which can be understood as the position of the lower end of the second conductive portion 302 is lower than the position of the upper end of the first electrode 110 in the axial direction of the inner tube 10.

[0203] Understandably, combined Figure 1 , the second electrode 120 is connected to the power source 200 through the conductive member 30. When the first electrode 110 and the second electrode 120 are powered, the second electrode 120 is opposite to the first electrode 110 and has opposite polarity, so an electric field is generated between the second electrode 120 and the first electrode 110. The second electrode 120 has the same polarity as the second conductive portion 302, and there is a possibility of discharge when the second conductive portion 302 is spaced a certain non-insulated distance from the end of the first electrode 120.

[0204] The second conductive portion 302 is arranged to cover the end surface 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 with the end of the first electrode 110 facing the second electrode 120, so that the space between the second conductive portion 302 and the end of the first electrode 110 facing the second electrode 120 is filled by the side wall of the inner tube 10 to strengthen insulation.

[0205] Please continue reading Fig. 20 and Fig.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.

[0206] In this way, the end surface of the second conductive portion 302 will not face the end surface of the first electrode 110, so that the second conductive portion 302 is not likely 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.

[0207] 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 the 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.

[0208] The overlap dimension n between the second conductive portion 302 and the end 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 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.

[0209] Please refer again Fig.17 and Fig.18 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, a portion of the second tube segment 102 is exposed through the second hollow portion 352 and faces the outer tube 20, and the hollow portion 35 includes the second hollow portion 352.

[0210] In this way, the heat capacity of the conductive element 30 can be further reduced, and the time required for the heating component 100 to heat up and cool down can be shortened.

[0211] Specifically, the second hollow portion 352 may be in the shape of a straight strip, a curve, a circular hole, etc. The number of the second hollow portions 352 may 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 the second conductive portion 302 and is 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 may face the inner wall of the outer tube 20 through the second hollow portion 352.

[0212] See also Fig.18 and Fig. 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 circumferential direction of the second tube segment 102 , and a second hollow portion 352 is formed between two adjacent second conductive strips 342 .

[0213] In this way, the thermal resistance of the high temperature of the arc in the center of the discharge area 130 being conducted outward can be further reduced, thereby increasing the heating rate.

[0214] Specifically, the second conductive strip 342 and the second hollow portion 352 may be formed by cutting on the metal tube body. Along the circumference of the second tube section 102, the second conductive strip 342 and the second hollow portion 352 may be arranged in sequence. The second conductive strip 342 may 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 may have a side parallel to the central axis of the inner tube. The second hollow portion 352 is formed at intervals between adjacent sides of two adjacent second conductive strips 342.

[0215] The number of the second conductive strips 342 may 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.

[0216] Please continue reading Fig.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 , and the connecting ring 343 covers the end of the first electrode 110 toward the second electrode 120 along the circumference of the inner tube 10 .

[0217] In this way, by providing the connecting ring 343 , the local electric field strength can be reduced to avoid discharge breakdown between the first electrode 110 and the conductive member 30 , and the mechanical strength of the conductive member 30 can be enhanced to reduce the risk of deformation and failure of the conductive member 30 .

[0218] 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 tube wall of the conductive member 30 and covers the end circumference of the first electrode 110 facing the second electrode 120 .

[0219] 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.

[0220]

[0221] Among them, E is the electric field intensity, U is the voltage applied by 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 ε is the dielectric constant of the medium between the two electrodes.

[0222] It can be understood that the conductive member 30 forms a hollow portion 35, the side wall area becomes smaller, and the electric field strength between the side walls increases, which easily leads 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, and avoid the breakdown between the first electrode 110 and the conductive member 30.

[0223] See also Fig.14 and Fig.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 .

[0224] So, please combine Fig.11 and Figure 1 , which can cut off the heat transfer path at the bottom of the conductive member 30 to the maximum extent, reduce the downward conduction of heat, and improve the efficiency of heat used to heat the aerosol-forming matrix 300.

[0225] Specifically, the hollow portion 35 may be formed by cutting the side wall of the tube body of the conductive member 30. The conductive member 30 may retain a portion of the second electrode circumference to form a second conductive ring 320 for connecting the second electrode 120. A portion of the conductive tube wall may 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 the power source 200. The first conductive ring 310 may be exposed outside the outer tube 20.

[0226] like Fig.15 and Fig.18 As shown, the first conductive ring 310 and the second conductive ring 320 are connected by a conductive strip 34. The number of the conductive strip 34 used to connect 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, and the outer circumference of the first pipe segment 101 and the second pipe segment 102 faces the outer pipe 20 through the hollow portion 35.

[0227] like Fig.12 and Fig.13 As shown, in some embodiments, the conductive member 30 includes a connection wire 33 connected to the first conductive ring 310, and 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 tube body of the conductive member 30. 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.

[0228] See also 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 .

[0229] In this way, the conductive member 30 and the inner tube 10 are easily assembled and have a compact structure, which is beneficial to the miniaturization of the heating component 100 .

[0230] 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 .

[0231] In some embodiments, see 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 zone 130, and the maximum temperature can reach 2000°C. A large amount of heat in the center of the discharge zone 130 is conducted or radiated to the aerosol-forming matrix 300 around the outer tube 20 through the inner tube 10, the conductive member 30 and the outer tube 20. The conductive member 30 fits tightly to 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 close to the inner tube 10, can effectively prevent the conductive member 30 from contacting the inner wall of the outer tube 20, and avoid uneven temperature field distribution of the outer tube 20.

[0232] See also Fig. 22 In some embodiments, the cylindrical portion of the conductive member 30 is made by winding and is sleeved outside the inner tube 10 .

[0233] 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.

[0234] Specifically, the conductive member 30 can be formed by winding a sheet metal. The sheet metal can be wound around the central axis 1011, and the wound sheet metal surrounds the inner tube for a circle to form a cylindrical or annular conductive tube body. The conductive tube body can have a gap in the axial direction of the inner tube 10, so that the cross section of the conductive member 30 along the radial direction of the inner tube 10 is "C"-shaped, which is convenient for adjusting the diameter of the tube body formed by winding, and then adjusting the assembly tightness between the conductive member 30 and the inner tube 10.

[0235] See also Fig.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 , and 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 .

[0236] In this way, the heat capacity can be reduced by the conductive wire 330, thereby increasing the speed of heating and cooling.

[0237] Specifically, the conductive wire 330 surrounds the inner tube, dividing the outer circumferential surface 1001 of the inner tube 10 and the corresponding tube section of the conductive member 30 into different blocks to form a hollow portion.

[0238] 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 position 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.

[0239] 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 .

[0240] When there is only one conductive wire 330, one 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 for 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 inner tube 10 not covered by the conductive wire 330 faces the inner wall of the outer tube 20.

[0241] See also Fig.16 and Fig.23 In some embodiments, the conductive wire 330 is surrounded by a solenoid 30 a , and at least a portion of the pitch of the solenoid 30 a is greater than 0 to form a hollow portion 35 .

[0242] In this way, the conductive wire 330 forms a solenoid 30a, which is convenient for assembly 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.

[0243] 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 circle of the conductive wire 330 around the inner tube and the next circle in the axial direction of the inner tube.

[0244] 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.

[0245] Please continue reading Fig.16 and Fig.23 In some embodiments, along the axial direction of the solenoid 30a, the pitch of the middle portion of the solenoid 30a is greater than the pitch of at least one end.

[0246] In this way, the heat capacity distribution of the conductive member and the temperature field of the heating component 100 can be adjusted by the unequal pitch, thereby increasing the heating rate and reducing the heat conduction from the discharge region to components other than the aerosol-forming matrix 300 .

[0247] 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 outer periphery of the inner tube 10 and at an axial distance greater than 2 mm from the first end face 11. The pitch of the solenoid 30a in the middle of the two ends can be greater than the pitch at the two ends.

[0248] In some embodiments, the conductive wire 330 is connected to the second electrode 120 and is 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 0. The pitch of the solenoid 30a sleeved in the tube section below the discharge area 130 is increased, the heat capacity of the conductive solenoid 30a is reduced, the radiation area of ​​the inner tube 10 facing the outer tube 20 is increased, and the heating rate is improved.

[0249] Furthermore, the spiral tube body can be tightly matched or nested with the tube body of the inner tube 10.

[0250] See also 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 circumference of the inner tube 10 may be exposed outside the outer tube 20 .

[0251] In some embodiments, the conductive wires 330 form a mesh, and the mesh holes of the mesh form the hollow portion 35 .

[0252] 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 relatively large, which can effectively reduce the heat capacity.

[0253] Specifically, the conductive member 30 can be a mesh tube formed by interlacing a plurality of conductive wires 330. The mesh tube can be sleeved outside the inner tube 10 and tightly matched with the inner tube 10. The conductive wires 330 can also be arranged in an interlaced manner to form a mesh and coated on the outer wall of the inner tube 10.

[0254] In some embodiments, the wires constituting the solenoid 30a or the mesh light are round wires, flat strip wires, etc. The cross-sectional thickness of the wire of the conductive member 30 ranges from 0.05 mm to 0.2 mm. Further, the cross-sectional thickness of the wire of the conductive member 30 preferably ranges from 0.05 mm to 0.1 mm. For example, the cross-sectional thickness of the wire of the conductive member 30 may be 0.05 mm, 0.06 mm, 0.07 mm, or 0.1 mm.

[0255] 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 may present a track in a straight strip, a cylindrical shape, a curved strip, etc., and conducts the circuit along the corresponding track.

[0256] 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 .

[0257] 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.

[0258] As mentioned above, combined with Fig.12 , the position where the first electrode 110 is exposed from the inner tube 10 is P. The position where the portion of the first end portion 31 extending out of the outer tube 20 is the shortest from the point P in the axial direction of the inner tube 10 is marked as Q. The conductive member 30 can be bent at Q of the first end portion 31 and continue to extend in the radial direction of the inner tube or in a direction substantially the same as the radial direction of the inner tube, away from the first electrode 110, and connected to the power source 200.

[0259] 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 passage with the conductive member 30 to conduct one pole of the high voltage electricity. There is a predetermined distance between P and Q, and they are insulated and isolated by the inner tube 10, so as to avoid discharge or even discharge breakdown between P and Q when the conductive member 30 and the first electrode 110 conduct the two poles of the high voltage electricity, thereby ensuring the discharge reliability of the discharge area 130.

[0260] The inner tube 10 can be made of a material with high dielectric strength, for example, at least one of quartz and ceramics. Such materials can also transmit infrared radiation. The high dielectric strength of the inner tube 10 can reduce the probability of the plasma arc breaking through the inner tube 10.

[0261] 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, and 1.0 mm. In this way, the inner tube 10 can meet a certain strength, prevent stress fracture, prevent arc breakdown, and reduce heat capacity, which is conducive to the miniaturization of the heating component 100.

[0262] In some embodiments, the appropriate heat capacity can not only improve the heating efficiency during the heating process, but also maintain an appropriate cooling rate during the suction interval to avoid overheating of the aerosol-forming matrix 300.

[0263] See also Fig.12 and Fig.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 .

[0264] 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 31 and the first end face 11 .

[0265] Specifically, the first end face 11 and the second end face 12 may be in a circular ring shape. The center of the first end face 11 and the second end face 12 is passed through by the central axis 1011 of the inner tube 10. The second electrode 120 may be arranged at the center of the second end face 12. The conductive end 112 may surround the center of the second end face 12 to form a second end 32, and the second end 32 is electrically connected to the second electrode 120. It should be noted that there may be a variety of ways to connect the second end 32 of the conductive member 30 to the second electrode 120. The surrounding method facilitates assembly and improves the reliability of the connection. It is understandable that it can also be achieved by crimping, welding, etc.

[0266] The first electrode 110 can be inserted into the inner tube 10 from the center of the first end surface 11, and one end of the first electrode 110 inserted into the inner tube 10 faces the second electrode 120 and is spaced a predetermined distance from the first end surface 11. The end of the first electrode 110 inserted into the inner tube 10 can also be spaced the same distance from the first end portion 31 in the axial direction of the inner tube 10.

[0267] The inner tube 10 wraps 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, so that the inner tube 10 can form an insulating protection between the first electrode 110 and the conductive member 30. There is a predetermined distance 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 covers a portion of the distance between the first electrode 110 and the first end portion 31.

[0268] 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 .

[0269] Please refer again Fig.12 and Fig.13In some embodiments, the first electrode 110 is in a columnar shape. The first electrode 110 may be in a hollow columnar shape or may be solid. The cross-sectional shape of the first electrode 110 includes but is not limited to a circular shape, an elliptical shape, a square shape, a polygonal shape, and the like.

[0270] For example, the first electrode 110 is in the shape of a solid cylinder and is inserted into the inner tube 10 which is in the shape of a hollow cylinder, which is beneficial to miniaturization of the structure volume of the heating module. The first electrode 110 is inserted into the inner tube 10 and is coaxial with the inner tube 10.

[0271] 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 in 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 to the inner tube 10, in this embodiment, the above position can be the position where the conductive end 112 is exposed to the inner tube 10.

[0272] Specifically, the discharge end 111 can be vertically inserted into the hollow space of the inner tube 10, opposite to the second electrode 120. The conductive end 112 extends out of 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.

[0273] exist Fig.12 In the orientation, along the axial direction of the inner tube 10, from the second end face 12 to the first end face 11 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 sequentially arranged 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 tightly fitted with one side of the second electrode 120.

[0274] In some embodiments, the first electrode 110 is columnar, 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, a polygon, an ellipse, etc. The diameter of the first electrode 110 is the diameter of the circumscribed circle of the cross section of the first electrode 110.

[0275] This is beneficial for miniaturization of the heating component 100 and can also improve the burning resistance life of the first electrode 110 .

[0276] Exemplarily, the first electrode 110 may 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 may be slightly smaller than the inner diameter of the inner tube 10. For example, the diameter of the first electrode 110 may 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 may be 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm.

[0277] It can be understood that the first electrode 110 extends into one end of the inner tube 10 and discharges between the second electrode 120 to generate a plasma arc, and needs to withstand the high temperature burning of the plasma arc. When the diameter of the first electrode 110 is large, more heat is required to generate burning. The diameter of the first electrode 110 is appropriately increased to improve the burning resistance life. At the same time, the diameter of the first electrode 110 is limited by the inner diameter of the inner tube 10. Due to the demand for miniaturized products, the diameter of the first electrode 110 does not exceed 1.0 mm.

[0278] 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 the above heat-resistant conductive material makes the first electrode 110 more durable at 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.

[0279] See also 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 .

[0280] 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 .

[0281] 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 .

[0282] 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 sleeve made of rubber. 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 a sealing glue, a sealing glass glaze, etc., which is sealed at one end of the inner tube 10 close to the first end face 11.

[0283] In some embodiments, the end 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 .

[0284] 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. The first electrode 110 is located at the first end face 11 and is wrapped by the insulating part 40. The P point of the first electrode 110 is not easy to discharge with the Q point of the conductive part 30.

[0285] Specifically, the insulating member 40 may be in the shape of a hollow tube, and the wall of the insulating member 40 is thicker than the wall of the inner tube 10. The first electrode 110 may pass through the first end face 11 of the inner tube 10 and the insulating member 40 in sequence. The end of the inner tube 10 having the first end face 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 may pass through the first end face 11, penetrate the insulating member 40 along the axial direction of the inner tube 10, and pass through the side of the insulating member 40 away from the first end face 11 to the outside of the insulating member 40.

[0286] See also Fig.25 and Fig.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.

[0287] 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 .

[0288] For example, see Fig.26 , the first insulating part 41 is connected to the second insulating part 42. The first insulating part 41 is in a hollow cylindrical shape, and the second insulating part 42 is in a cubic shape and has a through hole 421 in the center. The central through hole 421 of the second insulating part 42 and the hollow part of the first insulating part 41 can be continuous.

[0289] See also Fig.26 The inner tube 10 wraps the first electrode 110 and is inserted into the first insulating part 41 . The first electrode 110 extends out of the inner tube 10 from the first end surface 11 in the first insulating part 41 and is inserted into the through hole 421 of the second insulating part 42 .

[0290] Please continue reading Figure 25-26 In some embodiments, the insulating member 40 covers a portion of the first electrode 110 located at the first end surface 11 .

[0291] 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 .

[0292] In the related art, the first electrode and the conductive member are connected to the two poles of the external power supply respectively, and the portion of the first electrode extending out of the inner tube and the first end of the conductive member need to maintain a large distance to avoid discharge breakdown between the first electrode and the first end, thereby damaging the heating component. The insulating member 40 of the embodiment of the present application covers the portion of the first electrode 110 extending out of the inner tube 10, so that the distance between the end of the first electrode 110 extending out of the inner tube 10 and the first end 31 is relatively small.

[0293] Specifically, the second insulating portion 42 covers the portion of the first electrode 110 extending from the first end surface 11 to the inner tube 10. The first electrode 110 is sequentially wrapped by the inner tube 10 and the first insulating portion 41 in 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.

[0294] 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, and the thickness of the second insulating portion 42 is thicker than that of the first insulating portion 41, so that the insulation strength of the second insulating portion 42 is greater. The second insulating portion 42 has a larger cross-sectional area, which can enhance the insulation protection of the first electrode 110 exposed to the outside of the inner tube 10.

[0295] In some embodiments, the insulating member 40 contacts the first end surface 11 to enhance the compactness of the structure and improve the insulation.

[0296] Please refer again Fig.25 and Fig.26 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 be electrically connected to the power source 200, the connector 50 is located on the side of the insulating member 40 away from the first end 31, and the insulating member 40 covers the connector 50 along the axial direction of the inner tube 10.

[0297] In this way, by connecting the first electrode 110 to the power source 200 through the connector 50, the distance required for maintaining insulation between the first electrode 110 and the first end 31 can be further shortened, thereby making the heating component 100 more compact.

[0298] Specifically, the connector 50 is electrically connected to an end of the first electrode 110 away from the second electrode 120. The connector 50 may be in a disc shape, covering the portion of the first electrode 110 that passes 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 connected to the first electrode 110.

[0299] See also Fig.26 and Fig. 27 In some embodiments, the second electrode 120 abuts against the second end surface 12 .

[0300] 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 .

[0301] Specifically, the second electrode 120 may cover the entire second end surface 12 and seal the end of the inner tube 10 having the second end surface 12. The second electrode 120 is close to the second end surface 12 on the side facing the first electrode 110. The second electrode 120 is closed on the side facing away from the second end surface 12 on the end facing the outer tube 20.

[0302] In some embodiments, the second electrode 120 is made of a heat-resistant conductive material. The use of a heat-resistant conductive material can improve the burning resistance 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.

[0303] See also Fig. 27 and Fig.31 In some embodiments, the second electrode 120 includes a mounting portion 121 and a protrusion 122 formed on the mounting portion 121 , and the protrusion 122 extends into the inner tube 10 and faces the first electrode 110 .

[0304] 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.

[0305] 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 disposed at the end of the inner tube 10 having the second end surface 12.

[0306] The protrusion 122 may be spherical or hemispherical and is formed on one 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.

[0307] It can be understood that the outer curvature radius of the protrusion 122 is large, and the charge in the conductive medium is easily concentrated at the position with a large curvature radius, generating a large electric field strength, which is conducive to generating plasma. The speed at which the protrusion 122 changes along the axial width of the inner tube 10 is relatively slow to avoid the protrusion 122 being too sharp and causing excessive concentration of charge and ablation.

[0308] See also 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 .

[0309] 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.

[0310] As mentioned above, the first electrode 110 is coaxial with the inner tube 10. The discharge zone 130 is a zone where the discharge between the second electrode 120 and the first electrode 110 generates a plasma arc. The second electrode 120 guides the discharge through the protrusion 122 toward the first electrode 110. The center of the protrusion 122 is located on the central axis 1011 of the inner tube 10, and the center of the first electrode 110 is also located on the central axis 1011 of the inner tube 10, thereby making it more likely that the center of the discharge zone 130 is located on the central axis 1011 of the inner tube 10.

[0311] In some embodiments, the end surface of the first electrode 110 extending into the inner tube 10 is slightly protruding, in a blunt arc shape, and has a smooth surface. The apex of the protruding end surface of the first electrode 110 may be located on the central axis 1011 of the inner tube 10, opposite to the protrusion 122 of the second electrode 120.

[0312] 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 directly opposite to the apex of the protrusion 122 .

[0313] Please continue reading Fig.26 and Fig. 27In 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 an inner wall surface of the tapered end portion 21 .

[0314] One end of the outer tube 20 having the tapered end 21 is inserted into the aerosol-forming substrate 300. The second electrode 120 has a protrusion 122 at its center, the protrusion 122 extends into the inner tube 10, and the center of the protrusion 122 is located on the central axis 1011 of the inner tube 10. The outer tube 20 is substantially coaxial with the inner tube 10. The side of the mounting portion 121 facing away from the second end face 12 abuts against the inner wall surface of the tapered end 21.

[0315] 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 transfer of heat to the circumference of the outer tube 20 .

[0316] Please refer again Fig.26 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 31 is closest to point P can be indicated by Q.

[0317] In some embodiments, along the axial direction of the inner tube 10 , the distance between the first end 31 and the position where the first electrode 110 is exposed from the inner tube 10 is greater than or equal to 2 mm.

[0318] 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.

[0319] Exemplarily, the line segment of PQ is in the same direction as the central axis 1011 of the inner tube 10. It can be understood that the length of the PQ line segment is the minimum value of the distance between the first end 31 and the position where the first electrode 110 is exposed from the inner tube 10. The length of the PQ line segment is not less than 2 mm. The length of the PQ line segment can be 2.1 mm, 2.3 mm, 2.5 mm, 2.6 mm, 3 mm, 4 mm, etc. The distance between other positions 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 line segment.

[0320] 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°.

[0321] 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.

[0322] As described 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 area 130 and cause failure of the heating component 100.

[0323] 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 from the second end face 12 to the first end face 11 on the outer wall of the inner tube 10. The end of the conductive member 30 close to the second end face 12 and closest to the position where the first electrode 110 is exposed from the inner tube 10 is the first end 31. It can also be said that the distance between the conductive member 30 and the position other than the first end 31 on the connecting wire 33 and the position where the first electrode 110 is exposed from the inner tube 10 is greater than the distance between the first end 31 and the position where the first electrode 110 is exposed from the inner tube 10.

[0324] 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. When 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 the first electrode 110 and the conductive member 30 conduct high voltage electricity, the first end portion 31 and the first electrode 110 exposed outside the inner tube 10 are prone to breakdown.

[0325] See also Fig. 27 and Fig.28 In some embodiments, the heating component 100 includes an infrared radiation film 60 , and the infrared radiation film 60 is disposed on the inner tube 10 , the outer tube 20 and / or the conductive member 30 .

[0326] In this way, the ability of the heating component 100 to heat through infrared radiation can be enhanced, and the utilization rate of the heat of the plasma arc can be further improved.

[0327] Specifically, the infrared radiation film 60 may be a coating attached to the inner wall or outer wall surface of the inner tube 10, the outer tube 20 and / or the conductive member 30. The coating material of the infrared radiation film 60 may be a material such as metal oxide, silicon, etc. that can specifically absorb infrared radiation.

[0328] For example, the infrared radiation film 60 can be a film made of one or more of the materials such as iron manganese copper oxide, CrC, TiCN, diamond-like carbon film (DLC), black silicon (HBQ), dolite, transition metal oxide series spinel, rare earth oxide, ion co-doped calcium ore, silicon carbide, zircon, boron nitride, etc. Exemplarily, the infrared radiation film 60 is plated on the outer wall surface of the outer tube 20 and the conductive member 30, and the surface of the outer wall of the inner tube 10 not covered by the conductive member 30.

[0329] Please refer again Fig. 27 and Fig.28In 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 .

[0330] Thus, the temperature difference between the outer tube 20 and the center of the discharge area 130 can be increased by setting the thermal insulation gap 1002, 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.

[0331] Specifically, the high temperature of the plasma arc in the center of the discharge region 130 may 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.

[0332] In some embodiments, the temperature measuring component 80 may also be disposed in the insulation gap 1002 between the inner tube 10 and the outer tube 20 . The temperature measuring component 80 may include a thermocouple or a temperature measuring probe. The thermocouple and the temperature measuring probe may be located in the interval below the discharge area 130 .

[0333] The temperature of the outer tube 20 at about 350°C can form a good heating effect on the aerosol-forming matrix 300. A heat-insulating gap 1002 is set between the outer tube 20, the inner tube 10 and the conductive member 30 to isolate the outer tube 20 from the discharge area 130 for a distance to prevent heat from being concentrated in the outer tube 20 and causing the outer tube 20 to overheat for a long time. The outer tube 20 is isolated from the inner tube 10 and the conductive member 30 by the heat-insulating gap 1002, and the temperature difference between the outer tube 20 and the discharge area 130 becomes larger. Under the condition that the temperature of the outer tube 20 does not exceed 350°C, the temperature of the discharge area 130 can be relatively increased, and the preheating time can be greatly reduced. The energy of infrared radiation is in a fourth-power ratio to temperature. The higher the temperature at the center of the discharge area 130, the stronger the energy radiated to the aerosol-forming matrix 300.

[0334] In some embodiments, the width of the insulation gap 1002 ranges from 0.05 mm to 0.3 mm.

[0335] In this way, the outer tube 20 can be prevented from overheating for a long time, while the structure of the heating component 100 is kept relatively compact and miniaturized.

[0336] Exemplarily, the width of the thermal insulation gap 1002 ranges from 0.05mm to 0.3mm, 0.06mm to 0.15mm, 0.15mm to 0.3mm, 0.07mm to 0.25mm, 0.1mm to 0.2mm, etc. For example, the width of the thermal insulation gap 1002 is 0.05mm, 0.06mm, 0.08mm, 0.12mm, 0.16mm, 0.17mm, 0.2mm, 0.25mm, 0.28mm, 0.3mm, etc. Specifically, the thermal insulation gap 1002 between the inner tube 10 and the outer tube 20 may 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 is smaller than the portion of the inner tube 10 facing the outer tube 20.

[0337] The width of the heat insulation gap 1002 between the inner tube 10 and the outer tube 20 is uniform, which can improve the coaxiality of the outer tube 20 and the inner tube 10 and improve the circumferential temperature uniformity of the discharge area 130 .

[0338] See also Fig.25 and Fig.26 In some embodiments, the heating component 100 includes an elastic member 70 , which 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 .

[0339] In this way, the elastic member 70 can fix the inner tube 10, the conductive member 30, and the outer tube 20, thereby improving the mechanical impact resistance of the heating component 100, and making the discharge heating center in the inner tube 10 have a high coaxiality with the outer tube 20, which is beneficial to improving the uniformity of the temperature field around the needle body. At the same time, the elastic member 70 can seal the open end 22 to reduce the overflow of discharge odor.

[0340] In some embodiments, the elastic member 70 is elastic. The elastic member 70 wraps the outer tube 20, the conductive member 30 and the inner tube 10, and the outer tube 20, the conductive member 30 and the inner tube 10 are assembled by interference extrusion. The elastic member 70 covers the open end 22 of the outer tube 20 and the inner tube 10 and the first end 31 extending from the open end 22. 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 zone 130 is 4mm-10mm 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 zone 130 is 5mm, 6mm, 7mm, 8mm, 9mm, 10mm.

[0341] The elastic member 70 can be supported by a relatively dense elastic material. For example, a sleeve made of rubber material is used as the elastic member 70.

[0342] See also Fig.29 In some embodiments, the heating component 100 includes a base 90 , and the inner tube 10 is mounted on the base 90 .

[0343] In this way, the base 90 can install and fix the tubular elements in the heating component 100 to enhance the structural stability.

[0344] Specifically, the portion of the outer tube 20 that is exposed from the base 90 is inserted into the aerosol-forming substrate 300. The height of the outer tube 20 that is exposed from the base 90 ranges from 14 to 20 mm. For example, the height of the outer tube 20 that is 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 that is exposed from the base 90 ranges from 14 mm, 14.5 mm, 15 mm, 16 mm, 18 mm, and 20 mm.

[0345] In one embodiment, see Fig.30 and Fig.31 , the base 90 may include a first bracket 91, a second bracket 92 and a shell 93. The first bracket 91 and the second bracket 92 are interlocked with each other, and the shell 93 covers the outside of the first bracket 91 and the second bracket 92. The first bracket 91 and the second bracket 92 are matched with the outer diameter of the insulating member 40, and the insulating member 40 is fixedly installed between the first bracket 91 and the second bracket 92, so that the part of the first electrode 110 wrapped by the insulating member 40 exposed outside the inner tube 10 and the end of the inner tube 10 including the first end face 11 are installed and fixed in the base 90. The first bracket 91 and the second bracket 92 are matched with the outer diameter of the elastic member 70, so that the end of the outer tube 20 close to the first end face 11 and the end of the conductive member 30 including the first end 31 are installed and fixed in the base 90. A wire outlet hole 903 is provided on the shell 93. Combined with Figure 1 The connecting wire 33 can extend from the outlet hole 903 to the outside of the base 90 to connect to the power source 200, and the temperature measuring wire 83 can be connected to the control center 400 through the outlet hole 903.

[0346] In some embodiments, the first bracket 91 and the second bracket 92 may be overlapped.

[0347] See also Figure 1 The aerosol generating device 1000 of the embodiment of the present application includes the heating component 100 of any of the above-mentioned embodiments.

[0348] In one embodiment, the aerosol generating device 1000 may include a battery 210 and a transformer 220, and the battery 210 and the transformer 220 may constitute a power source 200 of the aerosol generating device 1000. Fig.30The first electrode 110 and the second electrode 120 are respectively connected to the two output ends of the transformer 220, and the high voltage alternating current is conducted to form a high-intensity electric field in the inner tube 10 to generate plasma, thereby generating a relatively 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 matrix 300. The heat is transmitted to the aerosol-forming matrix 300 through the inner tube 10 and the outer tube 20. The aerosol-forming matrix 300 absorbs the heat and atomizes to form an aerosol.

[0349] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0350] 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 spirit 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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