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 an insulating spacer. Wherein the outer tube is used for being in contact with an aerosol forming substrate; the first electrode and the second electrode are at least partially arranged in the outer tube, and the first electrode and the second electrode are arranged at an interval; the insulating barrier is arranged between the first electrode and the second electrode, a gap is formed between the first electrode and / or the second electrode and the insulating barrier, and plasma is generated in the gap when the first electrode and the second electrode are electrified. According to the heating assembly and the aerosol generating device, the plasma and the high temperature in the plasma generating process are used for heating the aerosol to form the substrate, and the heating time needed for forming the aerosol is shortened.

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] The aerosol generating device can be used to heat the aerosol-forming substrate to form an aerosol by heating the aerosol-forming substrate without burning it. In the related art, the aerosol generating device usually heats the aerosol-forming substrate by a resistance heating method or an electromagnetic induction heating method. However, the above heating methods usually have the technical problem of a long preheating time. 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 an insulating barrier. Among them:

[0005] The outer tube is used to contact the aerosol-forming substrate;

[0006] The first electrode and the second electrode are at least partially disposed in the outer tube, and the first electrode is spaced apart from the second electrode;

[0007] The insulating barrier is arranged between the first electrode and the second electrode, wherein a gap is formed between the first electrode and / or the second electrode and the insulating barrier, and plasma is generated in the gap when the first electrode and the second electrode are energized.

[0008] The heating component of the embodiment of the present application generates plasma in the gap between the first electrode and / or the second electrode and the insulating barrier, and utilizes the plasma generation process and the high temperature of the plasma itself to heat the aerosol-forming matrix, thereby shortening the preheating time and heating time required to form the aerosol.

[0009] In some embodiments, the insulating barrier is a tube, the first electrode is at least partially inserted into the insulating barrier, and the second electrode is located outside the insulating barrier.

[0010] In some embodiments, the insulating barrier comprises a closed end and an open end opposite to the closed end, the closed end is located inside the outer tube, and the first electrode is inserted into the insulating barrier from the open end.

[0011] In some embodiments, the second electrode is a tube, the second electrode is sleeved outside the insulating barrier, and the upper end surface of at least one of the first electrode and the second electrode is lower than the upper end surface of the insulating barrier.

[0012] In some embodiments, the second electrode is formed with a hollow portion, and the hollow portion allows a portion of the insulating barrier to face the outer tube through the hollow portion.

[0013] In some embodiments, the wall thickness of the insulating barrier is in the range of 0.2 mm to 1 mm.

[0014] In some embodiments, the second electrode is attached to the insulating barrier, or the second electrode is attached to the inner wall of the outer tube.

[0015] In some embodiments, the heating component includes an infrared radiation film, and the infrared radiation film is disposed on at least one of the insulating barrier, the outer tube, the first electrode, and the second electrode.

[0016] In some embodiments, the insulating barrier includes a first insulating barrier and a second insulating barrier, the first insulating barrier wraps the first electrode, the second insulating barrier wraps the second electrode, and the first electrode and the second electrode are arranged in parallel.

[0017] In some embodiments, the heating component includes a seal, which is sealed to the inner wall of the outer tube and forms a first enclosed space with the outer tube. The first enclosed space contains a working gas, and the first electrode and / or the second electrode are at least partially located in the first enclosed space.

[0018] In some embodiments, the heating component includes a base, the base forms a second enclosed space, and the portion of the first electrode located outside the first sealed space and / or the end of the outer tube with an opening is located in the second enclosed space.

[0019] The aerosol generating device of the embodiment of the present application includes the heating component of any of the above embodiments.

[0020] 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

[0021] 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:

[0022] Figure 1 is a partial structural schematic diagram of an aerosol generating device according to an embodiment of the present application;

[0023] Figure 2 is a schematic cross-sectional structure diagram of a heating component according to an embodiment of the present application;

[0024] Figure 3 is a schematic structural diagram of an aerosol generating device according to an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of the three-dimensional structure of the heating component according to the embodiment of the present application;

[0026] Figure 5 yes Figure 4 Schematic diagram of the exploded structure of the heating component;

[0027] Figure 6 yes Figure 2 A partial enlarged schematic diagram of part A;

[0028] Figure 7 It is a partial structural schematic diagram of a heating component according to an embodiment of the present application;

[0029] Figure 8 is a schematic cross-sectional structure diagram of a heating component according to another embodiment of the present application;

[0030] Fig. 9 It is a partial structural schematic diagram of a heating component in another embodiment of the present application;

[0031] Fig.10 is a bottom view structural diagram of a heating component according to an embodiment of the present application;

[0032] Fig.11 is a bottom view structural schematic diagram of a heating component according to another embodiment of the present application;

[0033] Fig.12 is a bottom view structural schematic diagram of a heating component according to another embodiment of the present application;

[0034] Fig.13 is a bottom view structural schematic diagram of a heating component according to another embodiment of the present application;

[0035] Fig.14 is a schematic diagram of the three-dimensional structure of a heating component according to another embodiment of the present application;

[0036] Fig.15 yes Fig.14 A schematic cross-sectional view of the heating component along the BB direction;

[0037] Fig.16 It is a partial structural schematic diagram of an aerosol generating device according to another embodiment of the present application.

[0038] Description of reference numerals:

[0039] Aerosol generating device 1000, external power source 200, battery 210, transformer 220, aerosol forming matrix 300, control center 400, PCBA board 410, control circuit 420, cover 500, cleaning assembly 600;

[0040] Heating component 100, insulating barrier 10, closed end 13, open end 14, first insulating barrier 151, second insulating barrier 152, outer tube 20, tapered end 21, open end 22, seal 23, first enclosed space 201, first electrode 110, second electrode 120, center hole 1201, gap 1300, solenoid 30a, connecting wire 33, hollow portion 35, infrared radiation film 60, first gap 1101, second gap 1202, first interval 2010, second interval 2020, base 90, second enclosed space 902. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] See also Figure 1-Figure 3 The heating component 100 of the embodiment of the present application includes an insulating barrier 10, an outer tube 20, a first electrode 110 and a second electrode 120. The outer tube 20 is used to contact the aerosol-forming substrate 300. The first electrode 110 and the second electrode 120 are both at least partially disposed in the outer tube 20, and the first electrode 110 and the second electrode 120 are spaced apart.

[0047] The insulating barrier 10 is disposed between the first electrode 110 and the second electrode 120, and a gap 1300 is formed between the first electrode 110 and / or the second electrode 120 and at least a portion of the insulating barrier 10. When the first electrode 110 and the second electrode 120 are energized, plasma is generated in the gap 1300 in a controlled manner.

[0048] The heating component 100 of the embodiment of the present application generates plasma in the gap 1300 between the first electrode 110 and / or the second electrode 120 and the insulating barrier 10, and utilizes the plasma generation process and the high temperature of the plasma itself to heat the aerosol-forming matrix 300, thereby shortening the preheating and heating time required to form the aerosol.

[0049] Plasma is generated between the first electrode 110 and the second electrode 120 by dielectric barrier discharge. Dielectric barrier discharge (DBD) is a high-voltage discharge between two electrodes separated by an insulating dielectric barrier. The insulating medium is a substance with very low conductivity. Since there is an insulating medium between the two electrodes, the structure of the DBD device is similar to that of a capacitor, which can conduct alternating current but almost does not conduct direct current. Dielectric barrier discharge is uniform and stable, and the discharge process is nearly silent.

[0050] When high voltage alternating current is applied to the first electrode 110 and the second electrode 120 , electrons between the first electrode 110 and the second electrode 120 are accelerated by the strong electric field and obtain sufficient energy to cross the energy barrier in the medium, electron penetration occurs, and plasma is formed.

[0051] The first electrode 110 is separated from the second electrode 120 by the insulating barrier 10. Plasma is generated between the first electrode 110 and the insulating barrier 10 and between the second electrode 120 and the insulating barrier 10.

[0052] In some embodiments, a first gap 1101 is formed between the first electrode 110 and the insulating barrier 10 , and a second gap 1202 is formed between the second electrode 120 and the insulating barrier 10 . The gap 1300 mentioned above includes the first gap 1101 and the second gap 1202 .

[0053] In some embodiments, a first gap 1101 is formed between the first electrode 110 and the insulating barrier 10. The second electrode 120 can be in close contact with the insulating barrier 10 and cover a portion of the surface of the insulating barrier 10 facing the outer tube 20. The gap 1300 mentioned above is the first gap 1101.

[0054] In some embodiments, the first electrode 110 may be in close contact with the insulating barrier 10 and cover at least a portion of the insulating barrier 10. A second gap 1202 is formed between the second electrode 120 and the insulating barrier 10. The gap 1300 mentioned above is the second gap 1202.

[0055] The width of the first gap 1101 or the second gap 1202 may be in the range of 0.1 mm to 1.0 mm (the range includes the endpoint values, and similar expressions of the following numerical ranges may be understood equivalently).

[0056] It should be noted that 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 the ionization of gas under the action of an electric field. The plasma generation process can generate a large amount of heat, and the temperature of plasma can reach 1400℃~2000℃ under working conditions.

[0057] The heating component 100 of the embodiment of the present application utilizes the plasma generation process and the high temperature of the plasma to heat the aerosol-forming substrate 300. The heat generated by the plasma between the first electrode 110 and the insulating barrier 10 and between the second electrode 120 and the insulating barrier 10 is transmitted or radiated to the aerosol-forming substrate 300 through the outer tube 20, so that the aerosol-forming substrate 300 absorbs the heat to form an aerosol.

[0058] See also Figure 2 In some embodiments, the first electrode 110 is opposite to the second electrode 120, and a first gap 1101, an insulating barrier 10, and a second gap 1202 are sequentially provided between the first electrode 110 and the second electrode 120. Alternating current may be applied to the first electrode 110 and the second electrode 120, and plasma is formed in the first gap 1101 and the second gap 1202. The heat of the plasma may be transferred to the aerosol-forming substrate 300 via the second electrode 120, the insulating barrier 10, and the outer tube 20 in the form of heat conduction or infrared radiation.

[0059] In some embodiments, a working gas may be filled between the first electrode 110 and the second electrode 120. The working gas mainly exists in the first gap 1101 and the second gap 1202. The working gas may be air, nitrogen, argon, carbon dioxide, etc.

[0060] The first electrode 110 may be made of a metal and / or alloy material with good conductivity. The first electrode 110 may be made of different materials according to different working gases. For example, the first electrode 110 may be made of at least one of copper alloy, nickel and nickel-based alloy, stainless steel, zirconium, hafnium and tungsten.

[0061] Exemplarily, the material of the first electrode 110 is tungsten. Tungsten has a high melting point and is resistant to high temperatures. The first electrode 110 made of tungsten is prone to arcing. However, tungsten has poor oxidation resistance. The first electrode 110 made of tungsten needs to be filled with nitrogen, argon, carbon dioxide, and other working gases that are not prone to oxidation reactions, and cannot use working gases containing oxygen, such as air.

[0062] For example, see Figure 1 and Figure 3, the first electrode 110 and the second electrode 120 are configured to apply alternating current. The first electrode 110 and the second electrode 120 can be connected to the two poles of the external power supply 200 respectively. The external power supply 200 may include a battery 210, a control circuit 420 and a transformer 220. The transformer 220 may be used for inversion and boosting. The direct current of the battery 210 generates high-voltage alternating current after passing through the control circuit 420 and the transformer 220. The frequency of the alternating current may be 10kHz-1MHz.

[0063] The frequency of the alternating current is 10 kHz-1 MHz, which can achieve the voltage and power parameters required for dielectric barrier discharge, thereby heating the aerosol-forming substrate 300 .

[0064] See also Figure 2 , Figure 4 and Figure 5 In some embodiments, the insulating barrier 10 is a tube, the first electrode 110 is at least partially inserted into the insulating barrier 10 , and the second electrode 120 is located outside the insulating barrier 10 .

[0065] In this way, the insulating barrier 10 can block the first electrode 110 and the second electrode 120 to form a dielectric barrier discharge structure and generate plasma.

[0066] Specifically, the insulating barrier 10 may be a hollow tube, and the insulating barrier 10 may be referred to as an inner tube relative to the outer tube 20. The first electrode 110 may be columnar and coaxial with the insulating barrier 10. The first electrode 110 is inserted into the insulating barrier 10, and the second electrode 120 is disposed on the tube wall of the insulating barrier 10, so that the first electrode 110 and the second electrode 120 are separated by the tube wall of the insulating barrier 10. The first electrode 110 and the second electrode 120 may be connected to one pole of a high voltage alternating current, respectively, to form an alternating electric field between the first electrode 110 and the second electrode 120. Under the action of the alternating electric field, the electrons in the working gas obtain sufficient energy to cross the energy barrier of the insulating barrier 10, and the working gas is ionized to form plasma.

[0067] The first electrode 110 and the second electrode 120 can be arranged at a position close to the axial end of the insulating barrier 10, and the lengths are approximately equal. Along the radial direction of the insulating barrier 10, there can be a certain gap between the first electrode 110 and the insulating barrier 10, or the first electrode 110 can be closely fitted with the inner wall of the insulating barrier 10. There can be a certain gap between the second electrode 120 and the insulating barrier 10, or the first electrode 110 can be closely fitted with the outer wall of the insulating barrier 10. For example, the second electrode 120 can be plated on the outer wall of the insulating barrier 10.

[0068] The outer tube 20 can be sleeved outside the second electrode 120 to cover the insulating barrier 10. The first electrode 110 and the second electrode 120 can both extend out of the outer tube 20 to be connected to an external power source 200.

[0069] The insulating barrier 10 can be made of a material with high insulation strength, for example, quartz, glass, ceramics, etc. For another example, the insulating barrier 10 can be a quartz tube.

[0070] Please continue reading Figure 2 and Figure 5 In some embodiments, the insulating barrier 10 includes a closed end 13 and an open end 14 opposite to the closed end 13 , the closed end 13 is located in the outer tube 20 , and the first electrode 110 is inserted into the insulating barrier 10 from the open end 14 .

[0071] In this way, the closed end 13 can separate the first electrode 110 and the second electrode 120 to prevent discharge between the first electrode 110 and the second electrode 120 from generating an arc.

[0072] Specifically, the closed end 13 and the open end 14 may be two ends of the insulating barrier 10 in the axial direction. The central axis of the insulating barrier 10 may pass through the opening center of the open end 14, so that the first electrode 110 is inserted into the insulating barrier 10 from the open end 14 and is coaxial with the insulating barrier 10. The closed end 13 of the insulating barrier 10 extends into the outer tube 20 and is located at one end of the outer tube 20 that is closed.

[0073] The outer tube 20 may be a hollow tube with one end closed and the other end open. The outer tube 20 has an open end 22 as the open end, and the closed end may form a tapered end 21. The open end 22 and the closed end 13 may be two opposite ends of the outer tube 20 in the axial direction. The apex of the tapered end 21 may be located on the central axis of the outer tube 20 and protrude outward from the outer tube 20. The closed end 13 of the insulating barrier 10 may be located at the tapered end 21 and slightly protrude toward the apex of the tapered end 21. The shape of the closed end 13 may cooperate with the tapered end 21 to form a cone.

[0074] The outer diameter of the tubular insulating barrier 10 ranges from 1mm to 1.5mm, and the wall thickness ranges from 0.2mm to 1mm. Exemplarily, the outer diameter of the insulating barrier 10 can range from 1mm to 1.5mm, 1.1mm to 1.4mm, 1.2mm to 1.3mm, 1.25mm to 1.35mm, etc. For another example, the outer diameter of the insulating barrier 10 can range from 1mm, 1.1mm, 1.2mm, 1.4mm, 1.5mm. The wall thickness of the insulating barrier 10 can range from 0.2mm to 0.6mm, 0.3mm to 0.5mm, 0.4mm to 0.55mm, etc. For example, the wall thickness of the insulating barrier 10 is 0.2mm, 0.3mm, 0.4mm, 0.6mm, etc. The inner diameter of the insulating barrier 10, that is, the difference between the outer diameter and the wall thickness of the insulating barrier 10, is slightly greater than or equal to the diameter of the first electrode 110.

[0075] The diameter of the first electrode 110 ranges from 0.2 mm to 0.8 mm. For example, the diameter of the first electrode 110 can range from 0.2 mm to 0.8 mm, 0.3 mm to 0.7 mm, 0.4 mm to 0.6 mm, 0.45 mm to 0.55 mm, etc. For another example, the diameter of the first electrode 110 can range from 0.2 mm to 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, and 0.8 mm.

[0076] Please refer again Figure 2 and Figure 5 In some embodiments, the second electrode 120 is a tube, and the second electrode 120 is sleeved outside the insulating barrier 10 , and the upper end surface of at least one of the first electrode 110 and the second electrode 120 is lower than the upper end surface of the insulating barrier 10 .

[0077] In this way, the first electrode 110, the insulating barrier 10 and the second electrode 120 can be nested in sequence to form a needle-shaped heating structure, which is compact and conducive to miniaturization of the device.

[0078] Specifically, the second electrode 120 can be coaxial with the insulating barrier 10 and cover the outer wall of the insulating barrier 10. Along the axial direction of the insulating barrier 10, the second electrode 120 can extend from the closed end 13 of the insulating barrier 10 to the open end 14. At the open end 14 of the insulating barrier 10, a portion of the second electrode 120 can be exposed outside the outer tube 20.

[0079] It should be noted that the present application defines the direction from the closed end of the outer tube 20 along the axial direction of the outer tube 20 to the open end of the outer tube 20 as the direction from top to bottom.

[0080] The second electrode 120 is sleeved outside the insulating barrier 10, and the insulating barrier 10 is sleeved outside the first electrode 110, so that the insulating barrier 10 can block between the first electrode 110 and the second electrode 120. The first electrode 110, the insulating barrier 10, and the second electrode 120 can be inserted into the outer tube 20 together, and the end faces of the first electrode 110, the insulating barrier 10, and the second electrode 120 in the outer tube 20 that are closest to the tapered end 21 are upper end faces. One of the upper end faces of the first electrode 110 and the second electrode 120 is lower than the upper end face of the insulating barrier 10, or the upper end faces of the first electrode 110 and the second electrode 120 are lower than the upper end face of the insulating barrier 10, so that the upper end faces of the first electrode 110 and the second electrode 120 can be shielded by the insulating barrier 10 (to avoid the generation of plasma arc between the upper end faces of the first electrode 110 and the second electrode 120), so that dielectric barrier discharge occurs.

[0081] The second electrode 120 may be made of a material with high conductivity, such as metal materials such as stainless steel, nickel, and nickel alloy.

[0082] The outer tube 20 is disposed outside the second electrode 120. A certain gap may be maintained between the inner wall of the outer tube 20 and the outer peripheral surface of the second electrode 120. The inner wall of the outer tube 20 may also be in contact with the outer peripheral surface of the second electrode 120.

[0083] Exemplarily, the first electrode 110, the insulating barrier 10, the second electrode 120 and the outer tube 20 are nested in sequence to form a needle-shaped heating component 100. The first electrode 110, the insulating barrier 10, the second electrode 120 and the outer tube 20 may be substantially coaxial. The needle-shaped heating component 100 may be inserted into the aerosol-forming substrate 300 from the tapered end 21 of the outer tube 20 along the axial direction of the heating component 100. The outer wall of the outer tube 20 is in direct contact with the aerosol-forming substrate 300.

[0084] See also Figure 5 and Figure 7 In some embodiments, the second electrode 120 has a center hole 1201 that passes through both ends of the second electrode 120 along the axial direction of the second electrode 120 , and the insulating barrier 10 is disposed in the center hole 1201 .

[0085] Specifically, the second electrode 120 may be a through tube coaxial with the first electrode 110 and the insulating barrier 10. Along the axial direction of the second electrode 120, the insulating barrier 10 is inserted into the second electrode 120 from the center hole 1201 at one end of the second electrode 120, and extends out of the second electrode 120 from the center hole 1201 at the other end. The closed end 13 and the open end of the insulating barrier 10 may be exposed outside the second electrode 120 from the center holes 1201 at both ends of the second electrode 120, respectively.

[0086] In some embodiments, the outer diameter of the second electrode 120 tube ranges from 1.0 mm to 2.0 mm, and the wall thickness ranges from 0.05 mm to 0.3 mm.

[0087] For example, the outer diameter range of the second electrode 120 can be 1.0mm-1.9mm, 1.1mm-1.8mm, 1.2mm-1.8mm, 1.3mm-1.6mm, 1.4mm-1.5mm, etc., and the wall thickness range of the second electrode 120 can be 0.05mm-0.3mm, 0.06mm-0.28mm, 0.07mm-0.25mm, 0.08mm-0.24mm, 0.12mm-0.20mm, 0.14mm-0.16mm, etc.

[0088] For another example, the outer diameter of the second electrode 120 can be 1.0 mm, 1.2 mm, 1.3 mm, 1.5 mm, 1.7 mm, 2.0 mm, and the wall thickness of the second electrode 120 can be 0.05 mm, 0.08 mm, 0.10 mm, 1.15 mm, 0.21 mm, 0.25 mm, 0.3 mm. The inner diameter of the second electrode 120, that is, the difference between the outer diameter and the wall thickness of the second electrode 120, can be slightly greater than or equal to the outer diameter of the insulating barrier 10.

[0089] See also Figure 2 and Figure 6 In some embodiments, the insulating barrier 10 may be a hollow tube, which is sleeved outside the first electrode 110. The second electrode 120 is sleeved outside the insulating barrier 10. The first electrode 110, the insulating barrier 10, and the second electrode 120 may have substantially the same central axis, and the radii increase successively. The inner diameter of the insulating barrier 10 is slightly larger than the diameter of the first electrode 110, and the inner diameter of the second electrode 120 is slightly larger than the outer diameter of the insulating barrier 10. Thus, a first gap 1101 is formed between the first electrode 110 and the insulating barrier 10, and a second gap 1202 is formed between the second electrode 120 and the insulating barrier 10.

[0090] See also Figure 8 In some embodiments, the insulating barrier 10 may be a plate, and the first electrode 110 is disposed on one side of the insulating barrier 10. A certain distance is maintained between the side of the insulating barrier 10 facing the first electrode 110 and the first electrode 110, forming a first gap 1101. The second electrode 120 is disposed on the side opposite to the first electrode 110. A certain distance is maintained between the side of the insulating barrier 10 facing the second electrode 120 and the second electrode 120, forming a second gap 1202.

[0091] See also Figure 4 , Figure 7 and Fig. 9In some embodiments, the second electrode 120 is formed with a hollow portion 35 , and the hollow portion 35 allows a portion of the insulating barrier 10 to face the outer tube 20 through the hollow portion 35 .

[0092] In this way, the second electrode 120 can adjust the distribution of plasma through the hollow portion 35, thereby regulating the temperature field of the heating component 100.

[0093] Specifically, the second electrode 120 can form a hollow portion 35 by cutting a groove, a spiral structure, etc. For example, see Figure 7 , the second electrode 120 is a tube body, and a hollow portion 35 is formed by cutting on the tube wall. Fig. 9 The second electrode 120 is a wire, which is wound and extended along the axial direction of the insulating barrier 10 to form a solenoid 30 a. The pitch d of at least part of the solenoid 30 a is greater than 0 to form a hollow portion 35 .

[0094] It should be noted that the plasma is mainly formed in the area where the first electrode 110 and the second electrode 120 are opposite, so that the temperature of the area where the first electrode 110 and the second electrode 120 are opposite is higher and the heat is more concentrated. The direction from the tapered end 21 of the outer tube 20 to the open end 22 may be from top to bottom, and the outer tube 20 is inserted into the aerosol-forming substrate 300 from the tapered end 21. The area where the first electrode 110 and the second electrode 120 are opposite may be close to the tapered end 21 of the outer tube 20, so as to heat the aerosol-forming substrate 300. The hollow portion 35 may be mainly distributed in the interval below the area where the first electrode 110 and the second electrode 120 are opposite, so as to reduce the downward transfer of heat and improve the heat utilization rate of heating the aerosol-forming substrate 300.

[0095] In some embodiments, the hollow portions 35 may also be distributed in the area where the first electrode 110 and the second electrode 120 are opposite. No plasma is generated between the position where the hollow portions 35 of the second electrode 120 are located and the first electrode 110, but plasma can still be formed at the position where the second electrode 120 is hollowed out and opposite to the first electrode 110. Therefore, different hollow portions 35 can be designed as needed, and then different plasma and temperature distributions can be designed.

[0096] For example, see again Fig. 9 If the pitches at the upper and lower ends of the solenoid 30a are smaller than the pitch d of the middle part, the hollow portion 35 in the middle part will have a larger area, and the heat will be relatively easier to dissipate, so the temperature in the middle part will be relatively low.

[0097] In some embodiments, the wall thickness of the insulating barrier 10 ranges from 0.2 mm to 1 mm.

[0098] In this way, the insulating barrier 10 can prevent the discharge arc from being generated between the first electrode 110 and the second electrode 120 , and at the same time has a certain supporting strength and impact resistance.

[0099] Specifically, the insulating barrier 10 can be a pipe, and the wall thickness of the pipe wall ranges from 0.2mm to 0.6mm. The insulating barrier 10 can also be a plate, and the wall thickness of the plate ranges from 0.2mm to 0.6mm. Exemplarily, the wall thickness of the insulating barrier 10 can range from 0.2mm to 0.6mm, 0.3mm to 0.5mm, 0.4mm to 0.5mm, 0.55mm to 0.6mm, etc. For another example, the wall thickness of the insulating barrier 10 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm.

[0100] Please refer again Figure 8 and Fig.10 In some embodiments, the insulating barrier 10 may be a plate. The insulating barrier 10 extends into the outer tube 20, with one end close to the tapered end 21, extending from the tapered end 21 along the axial direction of the outer tube 20 to the open end 22 of the outer tube 20, and the other end partially exposed from the open end 22 to the outside of the outer tube 20. The insulating barrier 10 divides the inner part of the outer tube 20 into a first section 2010 and a second section 2020. The first electrode 110 is at least partially located in the first section 2010, and the second electrode 120 is at least partially located in the second section 2020.

[0101] The first electrodes 110 may be columnar and respectively pass through the first spaces 2010. The second electrodes 120 may be columnar and pass through the second spaces 2020. Both the first electrodes 110 and the second electrodes 120 may be metal wires.

[0102] The first electrode and / or the second electrode may also be in the form of a long plate. The first electrode 110 and the second electrode 120 may both be metal plate electrodes, respectively disposed in the first space 2010 and the second space 2020. The plate-shaped first electrode 110 and the second electrode 120 may be approximately parallel.

[0103] In some embodiments, see Fig.10 The insulating barrier 10 is embedded in the outer tube 20, and the first section 2010 and the second section 2020 formed are relatively closed in the outer tube 20. The width of the insulating barrier 10 in the radial direction of the outer tube 20 is nearly equal to the diameter of the outer tube 20, so that the insulating barrier 10 abuts against two opposite sides of the inner wall of the outer tube 20 in the radial direction of the outer tube 20. The insulating barrier 10 can extend along the axial direction of the outer tube 20, with one end abutting against the inner wall of the tapered end 21 and the other end extending out of the outer tube 20 from the open end 22.

[0104] In some embodiments, see Fig.11The width of the insulating barrier 10 in the radial direction of the outer tube 20 is slightly smaller than the diameter of the outer tube 20, and the insulating barrier 10 has at least one side in the radial direction of the outer tube 20 against the inner wall of the outer tube 20. The insulating barrier 10 divides the inner area of ​​the outer tube 20 into a first space 2010 and a second space 2020 that are interconnected.

[0105] In some embodiments, see Fig.12 The insulating barrier 10 maintains a certain distance from the inner wall of the outer tube 20 on both sides along the radial direction of the outer tube 20, and the insulating barrier 10 is suspended in the outer tube 20. The insulating barrier 10 divides the inner area of ​​the outer tube 20 into a first space 2010 and a second space 2020 that are interconnected.

[0106] In some embodiments, the insulating barrier 10 may be tubular and cover an outer surface of at least one of the first electrode 110 and the second electrode 120 .

[0107] See also Fig.13 In some embodiments, the insulating barrier 10 includes a first insulating barrier 151 and a second insulating barrier 152, the first insulating barrier 151 wraps the first electrode 110, the second insulating barrier 151 wraps the second electrode 120, and the first electrode 110 and the second electrode 120 are arranged in parallel.

[0108] As such, a gap 1300 is formed between the first electrode 110 and the second insulating barrier 152 and between the second electrode 120 and the first insulating barrier 151 , and plasma is generated in the gap 1300 and releases heat.

[0109] Specifically, the first insulating barrier 151 and the second insulating barrier 152 can be made of flexible insulating materials with low rigidity. For example, the first insulating barrier 151 is formed by wrapping the first electrode 110 with rubber, insulating tape, etc., and the second insulating barrier 152 is formed by wrapping the second electrode 120.

[0110] In this embodiment, the first electrode 110 and the second electrode 120 may both be columnar, for example, two parallel metal wires are arranged in the outer tube 20 as the first electrode 110 and the second electrode 120. The first electrode 110 and the second electrode 120 may also be plate-shaped, and the wider surfaces of the first electrode 110 and the second electrode 120 are opposite, for example, two parallel metal plates are arranged in the outer tube as the first electrode 110 and the second electrode 120. One of the first electrode 110 and the second electrode 120 may also be columnar and the other may be plate-shaped.

[0111] In some embodiments, the first insulating barrier 151 covers the first electrode 110 , the second electrode 120 is parallel to the first electrode 110 and a gap 1300 is formed between the second electrode 120 and the first insulating barrier 151 , and the outer surface of the second electrode 120 is not covered by the insulating element.

[0112] In some embodiments, the second insulating barrier 152 covers the second electrode 120 , the first electrode 110 and the second electrode 120 are arranged in parallel and a gap 1300 is formed between the first electrode 110 and the second insulating barrier 152 , and the outer surface of the first electrode 110 may not be covered by an insulating element.

[0113] See also Fig.15 In some embodiments, the second electrode 120 is attached to the insulating barrier 10 .

[0114] In some embodiments, the second electrode 120 is attached to the inner wall of the outer tube 20 .

[0115] In this way, the second electrode 120 is clearly limited, compactly assembled, and easy to install.

[0116] In some embodiments, the second electrode 120 may be a thin-walled tube, which is sleeved outside the insulating barrier 10, and the outer tube 20 is sleeved outside the second electrode 120. The tube wall of the second electrode 120 may fit closely with the outer circumference of the insulating barrier 10, or may fit closely with the inner wall of the outer tube 20.

[0117] In some embodiments, the second electrode 120 may be a metal film, a semiconductor film or a coating. The second electrode 120 may be plated or coated on the insulating barrier 10, covering the surface of the insulating barrier 10 facing the outer tube 20. The second electrode 120 may also be plated or coated on the inner wall of the outer tube 20.

[0118] In some embodiments, the first electrode 110 and the second electrode 120 can control the temperature of the outer tube 20 by adjusting the plasma output power.

[0119] Please refer again Figure 6 In some embodiments, the heating component 100 includes an infrared radiation film 60 , and the infrared radiation film 60 is disposed on at least one of the insulating barrier 10 , the outer tube 20 , the first electrode 110 , and the second electrode 120 .

[0120] In this way, the ability of the heat generating component 100 to heat by infrared radiation can be enhanced.

[0121] Specifically, the infrared radiation film 60 may be a coating attached to the insulating barrier 10, the inner wall or outer wall surface of the outer tube 20 and / or the surface of the second electrode 120 facing away from the insulating barrier 10. 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.

[0122] For example, the infrared radiation film 60 can be a film made of one or more of the following materials: iron manganese copper oxide, CrC, TiCN, diamond-like carbon (DLC), black silicon (HBQ), dolite, transition metal oxide series spinel, rare earth oxide, ion co-doped calcium ore, silicon carbide, zircon, boron nitride, etc. Different materials can be used to make infrared radiation films 60 that absorb radiation in different bands.

[0123] In some embodiments, the infrared radiation film 60 is plated on a surface of the second electrode 120 facing the outer tube 20 .

[0124] In some embodiments, the infrared radiation film 60 is coated on the inner wall surface of the outer tube 20 .

[0125] Please refer again Figure 2 and Figure 4 In some embodiments, along the axial direction of the outer tube 20 , the heights of the first electrode 110 , the insulating barrier 10 , and the second electrode 120 increase sequentially toward one end portion of the same side.

[0126] In this way, the positions where the first electrode 110 and the second electrode 120 are connected to the external power source 200 can be staggered, and the insulation strength of the section where the first electrode 110 and the second electrode 120 are connected to the external power source 200 can be enhanced.

[0127] Specifically, along the axial direction of the outer tube 20, from the closed conical end 21 to the open end 22, the direction can be from top to bottom. The first electrode 110, the second electrode 120 and the insulating barrier 10 can be extended from the open end of the outer tube 20 until the extended end abuts against the inner wall of the conical end 21. The heights of the first electrode 110, the insulating barrier 10 and the second electrode 120 at one end close to the open end 22 increase in sequence. The lower end surface of the insulating barrier 10 is located between the lower end surface of the first electrode 110 and the lower end surface of the second electrode 120, which can improve the insulation strength. The second electrode 120 may not extend out of the outer tube 20, and the insulating barrier 10 and the first electrode 110 extend out of the outer tube 20 from the open end 22. The lower end surface of the outer tube 20 may be located above the lower end surface of the second electrode 120, which is convenient for the external lead of the second electrode 120.

[0128] In some embodiments, the outer diameter of the outer tube 20 is in the range of 1.5 mm to 2.6 mm, and the wall thickness is in the range of 0.3 mm to 0.5 mm.

[0129] For example, the outer diameter of the outer tube 20 may range from 1.5 mm to 2.6 mm, 1.6 mm to 2.5 mm, 1.7 mm to 2.4 mm, 1.8 mm to 2.2 mm, 2.0 mm to 2.15 mm, etc. The wall thickness of the outer tube 20 may range from 0.3 mm to 0.5 mm, 0.32 mm to 0.48 mm, 0.36 mm to 0.45 mm, 0.39 mm to 0.43 mm, etc.

[0130] For another example, the outer diameter of the outer tube 20 can be 1.5 mm, 1.8 mm, 2.0 mm, 2.15 mm, 2.3 mm, 2.6 mm, etc. The wall thickness of the outer tube 20 can be 0.31 mm, 0.32 mm, 0.33 mm, 0.37 mm, 0.41 mm, 0.44 mm, 0.5 mm, etc.

[0131] Please continue reading Figure 2 and Figure 4 In some embodiments, the sizes of the first electrode 110, the insulating barrier 10, and the second electrode 120 extending outside the outer tube 20 decrease in sequence.

[0132] In this way, it is convenient for the first electrode 110 and the second electrode 120 to be connected to the external power source 200, and it is ensured that the leads of the first electrode 110 and the second electrode 120 will not overlap and cause breakdown.

[0133] Specifically, the first electrode 110 and the second electrode 120 can both extend from the open end 22 and be connected to the external power source 200 through the connecting wire 33. The first electrode 110, the insulating barrier 10 and the second electrode 120 all partially extend outside the outer tube 20 through the open end 22 of the outer tube 20, and the lower end surface of the insulating barrier 10 is located between the lower end surface of the first electrode 110 and the lower end surface of the second electrode 120. The end size of the first electrode 110 exposed outside the outer tube 20 is larger than the end size of the exposed insulating barrier 10, and both are larger than the end size of the second electrode 120 exposed.

[0134] See also Figure 2 and Figure 8 In some embodiments, the heating component 100 includes a seal 23, which is sealed to the inner wall of the outer tube 20 and forms a first enclosed space 201 with the outer tube 20. There is a working gas in the first enclosed space, and the first electrode 110 and / or the second electrode 120 are at least partially located in the first enclosed space 201.

[0135] In this way, harmful gases generated by discharge can be prevented from escaping and discharge odor can be isolated.

[0136] Specifically, the tapered end 21 of the outer tube 20 is inserted into the aerosol-forming matrix 300, and the outer tube 20 heats the aerosol-forming matrix 300. The first electrode 110, the second electrode 120 and the insulating barrier 10 are at least partially extended into the outer tube 20, and plasma is generated inside the outer tube 20. The tapered end 21 and the seal 23 seal the inner part of the outer tube 20 to form a first enclosed space 201. Plasma is generated in the enclosed first enclosed space 201, which can reduce the overflow of discharge odor, and can isolate the channels for filling the working gas and discharging the exhaust gas from the aerosol suction airway (not shown) to prevent the harmful gas generated by the discharge from being inhaled.

[0137] Exemplarily, glue is applied at the open end 22 of the outer tube 20 , between the second electrode 120 and the outer tube 20 , between the insulating barrier 10 and the outer tube 20 , and between the first electrode 110 and the insulating barrier 10 to form a seal 23 .

[0138] See also Fig.14 and Fig.15 In some embodiments, the heating component 100 includes a base 90 . The base 90 forms a second enclosed space 902 , and a portion of the first electrode 110 located outside the first enclosed space 201 and an end of the outer tube 20 with an opening are located in the second enclosed space 902 .

[0139] In the base 90 , the first electrode 110 and conductive elements such as wires in the base 90 may also form harmful gases such as ozone. Therefore, the second enclosed space 902 can further prevent the harmful gases generated by discharge from overflowing.

[0140] Specifically, the heating component 100 is mounted on the base 90. The open end 22 of the outer tube 20, that is, the end of the outer tube 20 with an opening, can be inserted into the base 90. The first electrode 110, the second electrode 120 and the insulating barrier 10 can partially extend from the opening of the open end 22 and extend into the base 90. The base 90 is sealed and assembled with the wall of the outer tube 20, the first electrode 110, the second electrode 120 and the insulating barrier 10.

[0141] Exemplarily, the base 90 may be sealed by glue filling.

[0142] It should be noted that when the working gas is air, a side reaction of ionizing oxygen to produce ozone will occur during the plasma generation process. Plasma will be generated inside the outer tube 20 and between the insulating barrier 10 and the first electrode 110 and / or the second electrode 120. Therefore, an ozone-absorbing substance can be coated on the inner wall of the outer tube 20 and the insulating barrier 10 to prevent ozone from overflowing. In the base 90, the first electrode 110 and the conductive elements such as the wires in the base 90 may also form ozone. The inner wall of the base 90 and the elements in the base 90 can be coated with an ozone-absorbing substance.

[0143] In some embodiments, the working gas is nitrogen, argon, carbon dioxide, etc. The base 90 and the outer tube 20 are sealed to prevent the working gas from leaking.

[0144] See also Figure 3 The aerosol generating device 1000 of the embodiment of the present application includes the heating component 100 of any of the above-mentioned embodiments.

[0145] Specifically, the aerosol generating device 1000 may include a battery 210, a PCBA board 410, a control circuit 420, a transformer 220, a heating component 100, a cover 500, and the like.

[0146] In one embodiment, the battery 210 and the transformer 220 may constitute the external power supply 200 of the heating component 100. The PCBA board and the control circuit may constitute a control center for regulating the power outputted from the external power supply to the first electrode and the second electrode, thereby regulating the heating power of the heating component.

[0147] Please combine Figure 1 The first electrode 110 and the second electrode 120 are respectively connected to one pole of the transformer 220, and high voltage alternating current is conducted to form a high-intensity alternating electric field in the outer tube 20, thereby forming plasma and generating high temperature and heat. The heating component 100 is connected to the cover 500, and the outer tube 20 is inserted into the aerosol-forming matrix 300. The heat of the plasma 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.

[0148] See also Figure 3 and Fig.16 In some embodiments, the aerosol generating device 1000 includes a cleaning component 600. The cleaning component 600 can generate plasma to remove impurities remaining after the aerosol-forming substrate 300 absorbs heat to generate aerosol.

[0149] 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.

[0150] 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: an outer tube for contacting the aerosol-forming substrate; a first electrode and a second electrode, wherein the first electrode and the second electrode are at least partially disposed in the outer tube, and the first electrode is spaced apart from the second electrode; and An insulating barrier is disposed between the first electrode and the second electrode, wherein a gap is formed between the first electrode and / or the second electrode and at least a portion of the insulating barrier, and plasma is generated in the gap when the first electrode and the second electrode are energized.

2. The heating component according to claim 1, characterized in that: The insulating barrier is a tube, the first electrode is at least partially inserted into the insulating barrier, and the second electrode is located outside the insulating barrier.

3. The heating component according to claim 2, characterized in that: The insulating barrier comprises a closed end and an open end opposite to the closed end, the closed end is located inside the outer tube, and the first electrode is inserted into the insulating barrier from the open end.

4. The heating component according to claim 2, characterized in that: The second electrode is a tube, and the second electrode is sleeved outside the insulating barrier. The upper end surface of at least one of the first electrode and the second electrode is lower than the upper end surface of the insulating barrier.

5. The heating component according to claim 4, characterized in that: The second electrode is formed with a hollow portion, and the hollow portion allows a portion of the insulating barrier to pass through the hollow portion and face the outer tube.

6. The heating component according to claim 2, characterized in that: The wall thickness of the insulating barrier is in the range of 0.2 mm to 1 mm.

7. The heating component according to claim 1, characterized in that: The second electrode is attached to the insulating barrier, or the second electrode is attached to the inner wall of the outer tube.

8. The heating component according to claim 1, characterized in that: The heating component includes an infrared radiation film, and the infrared radiation film is arranged on at least one of the insulating barrier, the outer tube, the first electrode and the second electrode.

9. The heating component according to claim 1, characterized in that: The insulating barrier comprises a first insulating barrier and a second insulating barrier, the first insulating barrier wraps the first electrode, the second insulating barrier wraps the second electrode, and the first electrode and the second electrode are arranged in parallel.

10. The heating component according to claim 1, characterized in that: The heating component includes a seal, which is sealed to the inner wall of the outer tube and forms a first enclosed space with the outer tube. The first enclosed space contains working gas, and the first electrode and / or the second electrode are at least partially located in the first enclosed space.

11. The heating component according to claim 10, characterized in that: The heating component includes a base, the base forms a second enclosed space, and the portion of the first electrode located outside the first sealed space and / or the end of the outer tube with an opening is located in the second enclosed space.

12. An aerosol generating device, characterized in that: It comprises the heating component described in any one of claims 1-11.

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