Heating assembly and aerosol generating device

Abstract

The invention discloses a heating assembly and an aerosol generating device. The heating assembly comprises an inner tube, an outer tube, a first electrode, a second electrode and a conductive piece. The outer pipe is sleeved outside the inner pipe; the first electrode is at least partially inserted into the inner tube; at least part of the second electrode is arranged at one end of the inner tube and is opposite to and spaced from the first electrode, and plasma is generated between the second electrode and the first electrode when the first electrode and the second electrode are electrified; the conductive part is used for being electrically connected with an external power source and comprises a first end and a second end connected with the first end, the second end is connected with the second electrode, and the first end and the position, exposed out of the inner pipe, of the first electrode are arranged at intervals in the axial direction of the inner pipe. According to the heating assembly, the distance between the first end part and the position, exposed out of the inner tube, of the first electrode is reasonably arranged, so that the probability of discharging between the first end part and the first electrode is reduced, and the reliability of normal use of the heating assembly and the aerosol generating device 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 plasma heating component includes an inner tube, two electrodes and a conductive member, at least one electrode can be mounted on the inner tube, the conductive member is connected to one of the electrodes, and an external power source can supply power to the electrode through the conductive member, so that discharge between the two electrodes generates plasma and heat. However, discharge may occur between the conductive member and the other electrode due to high voltage, thereby affecting the normal use of the plasma heating component. 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, an inner tube, a first electrode, a second electrode and a conductive member. Among them:

[0005] The outer tube is sleeved outside the inner tube;

[0006] The first electrode is at least partially disposed in the inner tube;

[0007] At least part of the second electrode is disposed at one end of the inner tube and is disposed opposite to and spaced from the first electrode, and plasma is generated between the second electrode and the first electrode when the first electrode and the second electrode are energized;

[0008] The conductive member includes a first end and a second end connected to the first end, the second end is connected to the second electrode, the first end is used to be electrically connected to an external power source, and the first end and the first electrode are spaced apart along the axial direction of the inner tube at positions where they are exposed from the inner tube.

[0009] In the heating component of the embodiment of the present application, the first end portion and the position where the first electrode is exposed from the inner tube are arranged at intervals along the axial direction of the inner tube, so that the first end portion can utilize the axial space of the heating component along the inner tube, thereby the spacing between the first end portion and the position where the first electrode is exposed from the inner tube can be reasonably arranged, thereby reducing the probability of discharge between the first end portion and the first electrode, and realizing the miniaturization of the heating component while also improving the reliability of normal use of the heating component.

[0010] In some embodiments, the inner tube includes a first end surface and a second end surface opposite to the first end surface, the first electrode is exposed from the inner tube at the first end surface, and the first end is at least partially located between the first end surface and the second end surface.

[0011] In some embodiments, the first electrode is columnar as a whole; or, the first electrode includes a discharge portion and a conductive portion connected to the discharge portion, the discharge portion is located in the inner tube, and the conductive portion extends from the first end surface outside the inner tube.

[0012] In some embodiments, the heating component includes an insulating member connected to the inner tube, and at least a portion of the insulating member is located between the first end portion and the first end surface; or

[0013] The heating component comprises an insulating member sleeved outside the inner tube, and at least a part of the insulating member is located between the first end surface and the second end surface.

[0014] In some embodiments, the end portion of the inner tube having the first end surface is inserted into the insulating member, and the first electrode is disposed through the insulating member.

[0015] In some embodiments, the insulating member includes a first insulating portion and a second insulating portion connected to the first insulating portion, the cross-sectional area of ​​the first insulating portion is smaller than the cross-sectional area of ​​the second insulating portion, the end of the inner tube having a first end face is inserted into the first insulating portion, and the first electrode is passed through the second insulating portion.

[0016] In some embodiments, the insulating member covers a portion of the first electrode located at the first end surface.

[0017] In some embodiments, the heating component includes a connector connecting the first electrode away from the second electrode, the connector is used to be electrically connected to an external power source, and the connector is located on a side of the insulating member away from the first end.

[0018] In some embodiments, the second electrode abuts against the second end surface.

[0019] In some embodiments, the second electrode includes a mounting portion and a protrusion formed on the mounting portion, wherein the protrusion extends into the inner tube and faces the first electrode.

[0020] In some embodiments, along the axial direction of the inner tube, a distance between the first end and a position where the first electrode is exposed from the inner tube is greater than or equal to 2 mm.

[0021] In some embodiments, the shortest distance between the conductive member and the position where the first electrode is exposed from the inner tube is greater than or equal to 2 mm.

[0022] In some embodiments, the heating component includes a connection wire connected to the first end, the connection wire is used to be electrically connected to an external power source, and an extension direction of the connection wire forms a preset angle with the axial direction of the inner tube.

[0023] In some embodiments, the first electrode is columnar, and a diameter of the first electrode is in the range of 0.4 mm-1.0 mm.

[0024] In some embodiments, the discharge arc length between the second electrode and the first electrode is 2 mm≤L≤10 mm.

[0025] In some embodiments, the discharge arc length between the second electrode and the first electrode is 6 mm<L≤10 mm.

[0026] In some embodiments, the conductive member is tubular and is sleeved outside the inner tube, and the first end and the second end are two axial ends of the conductive member respectively.

[0027] In some embodiments, the conductive member is formed with a hollow portion, and the hollow portion is located between the first end portion and the second end portion.

[0028] In some embodiments, the conductive member is in close contact with the outer wall of the inner tube, or the gap between the conductive member and the outer wall of the inner tube is less than or equal to 0.1 mm.

[0029] In some embodiments, the wall thickness of the conductive member ranges from 0.05 mm to 0.2 mm.

[0030] In some embodiments, the heating component includes an infrared radiation film, and the infrared radiation film is disposed on the inner tube, the outer tube and / or the conductive member.

[0031] In some embodiments, the outer tube is used to contact the atomizing medium, the second electrode and the second end are both located inside the outer tube, and the first end is at least partially located outside the outer tube or the end surface of the first end is substantially flush with the lower end surface of the outer tube.

[0032] In some embodiments, a heat insulating gap is formed between the inner tube and the conductive member and the inner wall surface of the outer tube.

[0033] In some embodiments, the insulation gap ranges from 0.05 mm to 0.3 mm.

[0034] In some embodiments, the heating component includes an elastic member, the elastic member is sleeved outside the end of the outer tube away from the second electrode, and the inner tube passes through the elastic member.

[0035] In some embodiments, the heating component includes a temperature measuring component connected to the outer tube, and the temperature measuring component is used to detect the temperature of the outer tube.

[0036] In some embodiments, the temperature measuring component is a temperature measuring film disposed on the wall of the outer tube, or a temperature measuring probe disposed on the outer wall of the outer tube.

[0037] The heating component of the embodiment of the present application includes an outer tube and an inner tube, a first electrode, a second electrode and a conductive member. Among them: the outer tube is sleeved outside the inner tube; the first electrode is at least partially arranged in the inner tube; at least part of the second electrode is arranged at one end of the inner tube, and is opposite to the first electrode and arranged at intervals, and plasma is generated between the second electrode and the first electrode when the first electrode and the second electrode are energized; the conductive member is connected to the external power supply along the first direction, and the first electrode extends along the second direction and is connected to the external power supply, and the first direction is different from the second direction.

[0038] The aerosol generating device of the embodiment of the present application includes the heating component of any one of the above embodiments.

[0039] 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

[0040] 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:

[0041] Figure 1 is a schematic structural diagram of a heating component according to an embodiment of the present application;

[0042] Figure 2 yes Figure 1 A schematic cross-sectional view of the heating component along the AA direction;

[0043] Figure 3 is a schematic diagram of the exploded structure of the heating component of the embodiment of the present application;

[0044] Figure 4 is a schematic structural diagram of an aerosol generating device according to an embodiment of the present application;

[0045] Figure 5 is a cross-sectional schematic diagram of a heating component according to another embodiment of the present application;

[0046] Figure 6 is a partial schematic diagram of a heating component according to another embodiment of the present application;

[0047] Figure 7 yes Figure 6 A schematic cross-sectional view of the heating component along the BB direction;

[0048] Figure 8 is a schematic structural diagram of an insulating member according to an embodiment of the present application;

[0049] Fig. 9 yes Figure 7 A partial cross-sectional enlarged schematic diagram of a heating component;

[0050] Fig.10 It is a partial structural schematic diagram of a heating component according to an embodiment of the present application;

[0051] Fig.11 is a schematic structural diagram of a second electrode in an embodiment of the present application;

[0052] Fig.12 is a partial cross-sectional enlarged schematic diagram of a heating component according to an embodiment of the present application;

[0053] Fig.13 yes Figure 7 A local enlarged schematic diagram of part C;

[0054] Fig.14 is a schematic structural diagram of a heating component according to another embodiment of the present application;

[0055] Fig.15 yes Fig.14 A schematic cross-sectional view of the heating component along the DD direction;

[0056] Fig.16 It is a schematic diagram of the exploded structure of a heating component in yet another embodiment of the present application.

[0057] Description of reference numerals:

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

[0059] Heating component 100, inner tube 10, first end face 11, second end face 12, central axis 1011, outer tube 20, tapered end 21, open end 22, first electrode 110, discharge end 111, conductive end 112, second electrode 120, mounting portion 121, protrusion 122, discharge area 130, conductive member 30, first end 31, second end 32, connecting wire 33, conductive strip 34, hollow portion 35, 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, temperature measuring wire 83, temperature sensing film 84, base 90, first bracket 91, second bracket 92, shell 93, wire outlet hole 903, first direction 1010, second direction 1020. DETAILED DESCRIPTION

[0060] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with 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.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] See also Figure 1-Figure 4 The heating component 100 of the embodiment of the present application includes an inner tube 10, an outer tube 20, a first electrode 110, a second electrode 120 and a conductive member 30. The outer tube 20 is sleeved outside the inner tube 10. The first electrode 110 is at least partially disposed in the inner tube 10. At least part of the second electrode 120 is disposed at one end of the inner tube 10, and is opposite to and spaced from the first electrode 110. When the first electrode 110 and the second electrode 120 are energized, plasma is controlled to be generated between the second electrode 120 and the first electrode 110.

[0066] The conductive member 30 is used to be electrically connected to the power source 200 outside the heating component 100. 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. The first end 31 and the first electrode 110 are spaced apart along the axial direction of the inner tube 10 at positions where they are exposed from the inner tube 10.

[0067] In the heating component 100 of the embodiment of the present application, the first end 31 and the position where the first electrode 110 is exposed from the inner tube 10 are arranged at intervals along the axial direction of the inner tube 10, so that the first end 31 can use the axial space of the heating component 100 along the inner tube 10, so that the spacing between the first end 31 and the position where the first electrode 110 is exposed from the inner tube 10 can be arranged reasonably, which can not only improve the space utilization rate and facilitate the miniaturization of the heating component 100, but also reduce the probability of discharge between the first end 31 and the first electrode 110, and improve the reliability of the normal use of the heating component 100. Compared with heating devices such as resistors, the plasma aerosol generating device has an additional transformer module and a unique high-voltage application environment, so the miniaturization of the device and the safety and reliability are also one of the contradictions that are difficult to resolve.

[0068] For details, please refer to Figure 3The inner tube 10 may be a hollow tube with openings at both ends. The length of the inner tube 10 in the axial direction is much greater than the length in the radial direction. The inner tube 10 as a whole may be cylindrical and have a central axis 1011. 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. The cross-sectional shape of the inner tube 10 may be various, such as circular, square, elliptical, etc., and may also be matched with the cross-sectional shape of the first electrode 110.

[0069] See also Figure 2 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. Figure 2 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 .

[0070] A certain distance is between one end of the first electrode 110 inserted into the inner tube 10 and the second electrode 120. For ease of description, in the embodiment of the present application, the interval between the first electrode 110 and the second electrode 120 is called 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.

[0071] Please continue reading Figure 2 , combined with Figure 4 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 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 temperature when the plasma arc is generated can reach more than 1500°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.

[0072] 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.

[0073] See also Figure 1 and Figure 2The 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 area 130 in the inner tube 10. The heat generated by the plasma arc in the discharge area 130 can be transmitted to the aerosol-forming matrix 300 located outside the outer tube 20 through the inner tube 10 and the outer tube 20 in the form of infrared radiation or heat transfer, so that the aerosol-forming matrix 300 absorbs the heat generated by the heating component 100 to form an aerosol.

[0074] Please refer again Figure 1-Figure 4 , the conductive member 30 can be arranged on the inner tube 10, and arranged between the first end 31 and the second end 32 along the axial direction of the inner tube 10. The first end 31 of the conductive member 30 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 can surround the second electrode 120, be arranged at one end of the inner tube 10, and be electrically connected to the second electrode 120. It should be noted that there can be multiple ways to connect the second end 32 of the conductive member 30 to the second electrode 120. The surrounding method is convenient for assembly and improves the reliability of the connection. It is understandable that it can also be achieved by crimping, welding, etc.

[0075] like Figure 2 As shown, the point where the portion of the first end portion 31 extending out of the outer tube 20 is shortest from the point P of the first electrode 110 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.

[0076] 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.

[0077] In some embodiments, the conductive member 30 may be bent along the radial direction of the inner tube 10 at the first end 31, and then bend again along the axial direction of the inner tube 10, and continue to extend toward the first end 32. The conductive member 30 may be made of a metal material with high conductivity.

[0078] In some embodiments, the second electrode 120 and the conductive member 30 are both separately manufactured components and connected at the second end surface 12 to conduct an external power supply to form a closed loop. The separate second electrode 120 and the conductive member 30 can be made of the same material.

[0079] In some embodiments, the second electrode 120 and the conductive member 30 are integrally formed components. The second electrode 120 is a portion located above the second end surface 12 and engaged with the second end surface, and the conductive member 30 is a portion laid on the wall of the inner tube 10 .

[0080] In some embodiments, the second electrode 120 may be a tubular conductor, which is sleeved outside the inner tube 10. One end of the tube is a disc-shaped end, which is buckled with the second end face 12. The other end of the tube extends toward the second end face 11 along the axial direction of the inner tube 10, and is connected to the connection wire 33 at a position between the first end face 11 and the second end face 12, and is connected to an external power source through the connection wire 33. In this embodiment, the conductive member 30 constitutes a part of the second electrode 120.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] See also Figure 2 and Figure 3 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 .

[0085] 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 .

[0086] Specifically, the first end face 11 and the second end face 12 may be annular. 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 disposed 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.

[0087] 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.

[0088] 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.

[0089] Please refer again Figure 2 and Figure 3 In 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.

[0090] 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.

[0091] See also Figure 5 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 from the inner tube 10, in this embodiment, the above position can be the position where the conductive end 112 is exposed from the inner tube 10.

[0092] In this way, by adjusting the extension direction of the conductive end 112 , the first electrode 110 is less likely to be discharged and broken down outside the inner tube 10 .

[0093] Specifically, the rigidity of the conductive end 112 may be smaller than that of the discharge end 111. The discharge end 111 has a greater rigidity and is kept vertically inserted into the hollow space of the inner tube 10. One end of the discharge end 111 away from the conductive end 112 faces 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.

[0094] exist Figure 2 In the orientation, along the axial direction of the inner tube 10, from the second end surface 12 to the first end surface 11 can be from top to bottom. Figure 5 The inner tube 10 is provided with 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 in order from top to bottom. The first end surface 11 is located below the first end 31 and above the conductive portion 111.

[0095] Exemplarily, the discharge end 111 may be a metal wire, and the conductive end 112 may be a conductive rod.

[0096] See also Figure 6 and Figure 7 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 .

[0097] 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 .

[0098] 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 .

[0099] 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.

[0100] 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 .

[0101] 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.

[0102] 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.

[0103] See also Figure 6-Figure 8 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.

[0104] 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 .

[0105] For example, see Figure 7 , 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.

[0106] See also Figure 7 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 .

[0107] Please continue reading Figure 6-Figure 8 In some embodiments, the insulating member 40 covers a portion of the first electrode 110 located at the first end surface 11 .

[0108] 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 .

[0109] 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. 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.

[0110] 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.

[0111] 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.

[0112] In some embodiments, the insulating member 40 contacts the first end surface 11 to enhance the compactness of the structure and improve the insulation.

[0113] Please refer again Figure 7 and Figure 8 In some embodiments, the heating component 100 includes a joint 50 connecting the first electrode 110 away from the second electrode 120, the joint 50 is used to be electrically connected to the power source 200, and the joint 50 is located on the side of the insulating member 40 away from the first end 31. The insulating member 40 can cover the joint 50 along the axial direction of the inner tube 10.

[0114] 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.

[0115] 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.

[0116] See also Figure 7 and Fig. 9 In some embodiments, the second electrode 120 abuts against the second end surface 12 .

[0117] 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 .

[0118] For details, please combine Fig. 9 The second electrode 120 may cover the entire second end surface 12, closing 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.

[0119] 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.

[0120] See also Figure 7 , Fig. 9 and Fig.11 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 .

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] See also Figure 7 and Fig.10 In some embodiments, the center of the protrusion 122 is located on the central axis 1011 of the inner tube 10 .

[0126] 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.

[0127] As mentioned above, the first electrode 110 is coaxial with the inner tube 10. The discharge zone 130 is a zone where the plasma arc is generated by discharge between the second electrode 120 and the first electrode 110. 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.

[0128] Please continue reading Figure 7 and Fig. 9 In some embodiments, the outer tube 20 includes a tapered end portion 21 , and the second electrode 120 is disposed at one end of the inner tube 10 and abuts against an inner wall surface of the tapered end portion 21 .

[0129] 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.

[0130] 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 .

[0131] Please refer again Figure 7The 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.

[0132] 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.

[0133] 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.

[0134] 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 part of the first electrode 110 exposed outside the inner tube is greater than the length of the PQ line segment. It should be noted that the line segment of 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 in a roughly parallel state, or the angle between the line segment of 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°.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] See also Figure 2 and Figure 4 In some embodiments, the heating component 100 includes a connection wire 33 connected to the first end 31, and the connection wire 33 is used to electrically connect to the power source 200. The extension direction of the connection wire 33 is substantially perpendicular to the axial direction of the inner tube 10. It should be noted that the extension direction of the connection wire 33 here is substantially perpendicular to the axial direction of the inner tube 10, including the case of being perpendicular and the case of being inclined. For example, the angle between the extension direction of the connection wire 33 and the axial direction of the inner tube 10 is greater than or equal to 30° and less than or equal to 90°. Preferably, the connection wire 33 gradually extends away from the position where the first electrode 110 is exposed to the inner tube 10, or the connection wire 33 gradually extends away from point P. Press Figure 7 Taking the positional relationship shown in FIG. 1 as a reference, the connecting wire 33 preferably extends in an upwardly inclined direction.

[0140] In this way, the connection wire 33 and the first electrode 110 can easily maintain a certain distance in the axial direction of the inner tube 10, thereby reducing the possibility of the first end portion 31 and the first electrode 110 at the first end surface 11 being broken down before the discharge region 130, and also reducing the possibility of the connection wire 33 and the first electrode 110 at the first end surface 11 being broken down.

[0141] Specifically, the connecting wire 33 may be a wire having a smaller rigidity than the first end 31 and the second end 32. The connecting wire 33 is connected to the first end 31 and extends from the first end 31 in a direction away from the central axis 1011 of the inner tube 10, and the extension direction may be substantially along the radial direction of the inner tube 10.

[0142] It can be understood that the connection wire 33 extends radially along the inner tube 10, and can be away from the central axis 1011 of the inner tube 10 when the extension length of the connection wire 33 is short. The first end 31 can form a substantially perpendicular foot of the connection wire 33 to the inner tube 10, so that the first end 31 is always the end of the conductive member 30 with the shortest distance from the first end surface 11. The extension direction of the connection wire 33 is biased towards the second electrode 120, which also has a similar effect.

[0143] See also Figure 2 and Figure 3In 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 may 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.

[0144] This is beneficial for miniaturization of the heating component 100 and can also improve the burning resistance life of the first electrode 110 .

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] In some embodiments, the end of the first electrode 110 extending into the inner tube 10 has a flat end surface, and the center of the end surface is located on the central axis 1011 of the inner tube 10 .

[0150] 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.

[0151] See also Fig.12 In some embodiments, the discharge arc length between the second electrode 120 and the first electrode 110 is 2 mm ≤ L ≤ 10 mm.

[0152] 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.

[0153] 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.

[0154] Please continue reading Fig.12 In some embodiments, the discharge arc length between the second electrode 120 and the first electrode 110 is 6 mm<L≤10 mm.

[0155] In this way, the discharge effect of the first electrode 110 and the second electrode 120 is better, and it is not easy to produce discharge odor. In addition, the temperature field distribution in the discharge arc length area is more conducive to temperature control. Appropriate temperature field distribution is very important for the consistency of aerosol taste and is conducive to the simplification of temperature control logic.

[0156] 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.

[0157] In one example, the arc length L between the second electrode 120 and the first electrode 110 is 8 mm. It can be understood that the arc length is approximately equal to the distance between the first electrode 110 and the second electrode 120 in the axial direction of the inner tube 10. The distance between the first electrode 110 and the second electrode 120 in the axial direction of the inner tube 10 can be fixed, so the arc length can be a fixed value.

[0158] See also Fig.10 In some embodiments, the conductive member 30 is tubular and is 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 .

[0159] In this way, the tubular conductive member 30 is sleeved outside the inner tube 10, which is beneficial to the circumferential transfer of heat from the center of the inner tube 10 to the outer tube 20, and is easy to assemble. The tubular conductive member 30 is not easily deformed by heat, so the selection range of the conductive member 30 material is wider, saving the installation space of the conductive member 30.

[0160] Specifically, the conductive member 30 can be coaxial with the inner tube 10 so that the center of the discharge region 130 is approximately located on the center line of the conductive member 30, and the heat conduction is uniform. 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.

[0161] Please refer again Fig.10 In some embodiments, the conductive member 30 is formed with a hollow portion 35 , and the hollow portion 35 is located between the first end portion 31 and the second end portion 32 .

[0162] In this way, the path for the heat generated by the plasma arc in the discharge region 130 to be transferred to the first end portion 31 can be cut off, thereby increasing the utilization rate of the heat for heating the aerosol-forming matrix 300 in the outer tube 20. The hollow portion 35 is also conducive to increasing the intensity of the plasma arc radiation to the outside.

[0163] Specifically, there may be multiple hollow portions 35, and the multiple hollow portions 35 are formed by the conductive strips 34 and / or the connecting rings (not shown). The multiple conductive strips 34 may be distributed along the circumference of the inner tube 10. There may be two conductive strips 34, and the two conductive strips 34 may be distributed at both ends of the same diameter of the inner tube 10 to form two hollow portions 35. Figure 2 The outer wall of the inner tube 10 faces the inner wall of the outer tube 20 through the hollow portion 35. The hollow portion 35 can extend from the first end 31 to the second end 32 along the axial direction of the inner tube 10, so that the area of ​​the outer wall of the inner tube 10 facing the inner wall of the outer tube 20 is relatively larger.

[0164] See also Figure 7 and Fig.13 In some embodiments, the conductive member 30 is in close contact with the outer wall of the inner tube 10, or 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.

[0165] In this way, the distance between the conductive member 30 and the inner tube 10 is relatively close, which can improve the heat transfer efficiency between the conductive member 30 and the inner tube 10. In addition, ensuring that the distance between the conductive member 30 and the inner tube 10 is relatively 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, thereby avoiding uneven temperature field distribution of the outer tube 20.

[0166] In some embodiments, the conductive member 30 may also be a conductive layer or conductive line coated on the inner tube 10, and its shape, thickness, and arrangement position on the inner tube 10 may be understood in the same way as the above-mentioned solution.

[0167] Specifically, the first electrode 110 and the second electrode 120 generate a plasma arc in the discharge region 130 in the inner tube 10, and the temperature of the plasma can reach above 1000° C., and a large amount of heat is generated in the center of the discharge region 130. The heat generated in the discharge region 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 is closely attached to the outer wall of the inner tube 10, and the effect of conducting the heat of the discharge region 130 is higher.

[0168] In some embodiments, the wall thickness of the conductive member 30 is in the range of 0.05 mm to 0.2 mm.

[0169] In this way, the heat capacity can be reduced and the energy utilization efficiency of heat generation can be improved.

[0170] 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, 0.06 mm, 0.08 mm, 0.10 mm, 0.12 mm, 0.15 mm, 0.16 mm, 0.2 mm, etc.

[0171] It can be understood that as the wall thickness of the conductive member 30 increases, the amount of heat that the conductive member 30 can absorb and store 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.

[0172] In some embodiments, the conductive member 30 is made of an oxidation-resistant metal material, which can prevent the conductive member 30 from oxidative failure during the heat transfer and electrical conduction process, thereby improving durability.

[0173] Specifically, the material of the conductive member 30 is at least one of a nickel-based alloy and an iron-based alloy.

[0174] See also Fig.12 and Fig.13 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 .

[0175] 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.

[0176] 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.

[0177] 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.

[0178] See also Figure 1 and Figure 4 In some embodiments, the heating component 100 includes an outer tube 20 sleeved outside the inner tube 10, the outer tube 20 is used to contact the aerosol-forming matrix 300, the second electrode 120 and the second end 32 are both located inside the outer tube 20, and the first end 31 is at least partially located outside the outer tube 20, or the end surface of the first end 31 is roughly flush with the lower end surface of the outer tube 20.

[0179] In this way, the heating component 100 can form a modular needle body, which is easy to assemble and produce.

[0180] For details, please refer to Figure 2 The outer tube 20 may be a hollow tube with one end closed and the other end open. The closed end of the outer tube 20 may form a tapered end 21, and the open end is an open end 22. The open end 22 forms a circular cross section, and the cross-sectional area of ​​the open end 22 may be greater than the cross-sectional area of ​​the tapered end 21.

[0181] The inner tube 10 wraps 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 conductive member 30 is closely attached to the outer wall of the inner tube 10, and 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.

[0182] In some embodiments, the outer tube 20 is made of at least one of quartz and ceramics, so that the outer tube 20 can provide insulation protection and can transmit infrared radiation, transmitting the infrared radiation emitted by the discharge of the first electrode 110 and the second electrode 120 to the outside of the outer tube 20 to heat the aerosol-forming matrix 300.

[0183] In some embodiments, the wall thickness of the outer tube 20 ranges from 0.3 mm to 0.5 mm (including the end 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.

[0184] Please refer again Fig.12 and Fig.13 In some embodiments, a thermal insulation gap 1002 is formed between the inner tube 10 and the conductive member 30 and the inner wall surface of the outer tube 20 .

[0185] 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.

[0186] 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.

[0187] 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.

[0188] In some embodiments, the width of the insulation gap 1002 ranges from 0.05 mm to 0.3 mm.

[0189] 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.

[0190] 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.

[0191] See also Figure 6 and Figure 7 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 .

[0192] 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.

[0193] 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. Preferably, 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.

[0194] 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.

[0195] See also Figure 14-16 In some embodiments, the heating component 100 includes a temperature measuring component 80 connected to the outer tube 20 , and the temperature measuring component 80 is used to detect the temperature of the outer tube 20 .

[0196] In this way, by detecting the temperature of the outer tube 20 through the temperature measuring component 80, the heating temperature of the aerosol-forming substrate 300 can be controlled more accurately.

[0197] Specifically, depending on the type of the aerosol-forming matrix 300, a good heating atomization effect can be obtained by stabilizing the temperature of the outer tube 20 at 200°C to 350°C. If the temperature of the outer tube 20 exceeds 350°C for a long time, the aerosol-forming matrix 300 is likely to gelatinize and carbonize.

[0198] Please combine Figure 4 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 to the control center 400, and adjusts the voltage or output power of the power supply 200 when the temperature is too high or insufficient to control the voltage between the first electrode 110 and the second electrode 120 to adjust the heating temperature.

[0199] In some embodiments, Fig.14 As shown, the temperature measuring component 80 is arranged on the outer wall of the outer tube 20, and can detect the outer surface temperature of the outer tube 20 contacting the aerosol forming matrix 300. The temperature measuring component 80 can be a temperature sensing film 84 arranged on the tube wall of the outer tube 20. The temperature sensing film 84 can be attached to the outer wall surface of the outer tube 20 to form a predetermined temperature measurement pattern. The temperature sensing film 84 can also be arranged on the inner wall surface of the outer tube. The temperature sensing film 84 can be arranged at a position equal to the center of the discharge area 130 in the axial direction of the outer tube 20, and surround the central axis 1011 of the outer tube 20. The predetermined temperature measurement pattern can be a circular ring that is coaxial with the outer tube 20 and extends in the circumferential direction of the outer tube 20. Preferably, the axial position of the temperature sensing film 84 on the outer tube 20 is lower than the discharge area 130, which is more conducive to the true feedback of the temperature.

[0200] In some embodiments, the temperature measuring component 80 includes a temperature sensing portion 81 and a temperature measuring wire 83 electrically connected to the temperature sensing portion 81, the temperature sensing portion 81 is arranged on the outer tube 20, and the first electrode 110 and the second electrode 120 are spaced apart from the temperature measuring wire 83. The temperature sensing portion 81 can be a temperature sensing film 84 attached to the outer wall of the outer tube 20. It should be noted that the temperature measuring wire 83 maintains a certain insulation distance from the first electrode 110 and the second electrode 120 to avoid inaccurate temperature measurement caused by high voltage crosstalk.

[0201] In some embodiments, the temperature measuring assembly 80 includes a temperature measuring probe disposed on the outer wall of the outer tube 20. The axial position of the temperature measuring probe on the outer tube 20 is lower than the discharge area 130.

[0202] In some embodiments, the temperature sensing portion 81 is a thermocouple or a temperature measuring resistor that is closely attached to the outer wall of the outer tube 20 or close to the outer wall.

[0203] In some embodiments, the temperature sensing unit 81 is a thermocouple or a temperature measuring resistor disposed between the outer tube 20 and the inner tube 10 .

[0204] See also Fig.14 In some embodiments, the heating component 100 includes a base 90 , and the inner tube 10 is mounted on the base 90 .

[0205] In this way, the base 90 can install and fix the tubular elements in the heating component 100 to enhance the structural stability.

[0206] 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.

[0207] In one embodiment, see Fig.15 and Fig.16, 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 4 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.

[0208] See also Figure 5 The heating component 100 of the embodiment of the present application includes an outer tube 20 and an inner tube 10, a first electrode 110, a second electrode 120 and a conductive member 30. The outer tube 20 is sleeved outside the inner tube 10; the first electrode 110 is at least partially disposed in the inner tube 10; at least part of the second electrode 120 is disposed at one end of the inner tube 10, and is opposite to and spaced from the first electrode 110. When the first electrode 110 and the second electrode 120 are energized, plasma is controlled to be generated between the second electrode 120 and the first electrode 110; the conductive member 30 is connected to the power supply 200 along a first direction 1010, and the first electrode 110 is connected to the power supply 200 along a second direction 1020, and the first direction 1010 is different from the second direction 1020.

[0209] In this way, the conductive member 30 and the first electrode 110 are electrically connected in different directions, further reducing the possibility of discharge at the electrical connection end.

[0210] In some embodiments, the first direction 1010 is a direction from the central axis 1011 of the inner tube 10 along the radial direction of the inner tube 10 pointing to the wall of the inner tube 10, and the second direction 1020 is a direction from the central axis 1011 of the inner tube 10 along the radial direction of the inner tube 10 pointing to the wall of the inner tube 10 on the side away from the first direction 1010.

[0211] In some embodiments, the first direction 1010 is inclined to the radial direction of the inner tube 10 and to the axial direction of the inner tube 10. The second direction 1020 is inclined to the radial direction of the inner tube 10 and to the axial direction of the inner tube 10, and points in a direction opposite to the first direction 1010.

[0212] See also Figure 4 The aerosol generating device 1000 of the embodiment of the present application includes the heating component 100 of any of the above-mentioned embodiments.

[0213] In one embodiment, the aerosol generating device 1000 may include a battery 210 and a transformer 220. The battery 210 and the transformer 220 may serve as an external power source for the heating component 100. Fig.15 The 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.

[0214] 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.

[0215] 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 and an inner tube, wherein the outer tube is sleeved outside the inner tube; a first electrode, the first electrode being at least partially disposed in the inner tube; a second electrode, at least a portion of which is disposed at one end of the inner tube and is disposed opposite to and spaced from the first electrode, wherein plasma is generated between the second electrode and the first electrode when the first electrode and the second electrode are energized; and A conductive member, the conductive member includes a first end and a second end connected to the first end, the second end is connected to the second electrode, the first end is used to be electrically connected to an external power source, and the first end and the first electrode are arranged at intervals along the axial direction of the inner tube at positions where they are exposed from the inner tube.

2. The heating component according to claim 1, characterized in that: The inner tube includes a first end surface and a second end surface opposite to the first end surface, the first electrode is exposed from the inner tube at the first end surface, and the first end portion is at least partially located between the first end surface and the second end surface.

3. The heating component according to claim 2, characterized in that: The first electrode is columnar as a whole; or, the first electrode includes a discharge portion and a conductive portion connected to the discharge portion, the discharge portion is located in the inner tube, and the conductive portion extends from the first end surface outside the inner tube.

4. The heating component according to claim 2, characterized in that: The heating component includes an insulating member connected to the inner tube, and at least a portion of the insulating member is located between the first end portion and the first end surface; or, The heating component includes an insulating member sleeved outside the inner tube, and at least a portion of the insulating member is located between the first end portion and the first end surface.

5. The heating component according to claim 4, characterized in that: The end portion of the inner tube having the first end surface is inserted into the insulating member, and the first electrode is disposed through the insulating member.

6. The heating component according to claim 5, characterized in that: The insulating member includes a first insulating portion and a second insulating portion connected to the first insulating portion, the cross-sectional area of ​​the first insulating portion is smaller than the cross-sectional area of ​​the second insulating portion, the end of the inner tube having the first end face is inserted into the first insulating portion, and the first electrode is penetrated through the second insulating portion.

7. The heating component according to claim 5, characterized in that: The insulating member covers a portion of the first electrode located at the first end surface.

8. The heating component according to claim 4, characterized in that: The heating component includes a connector connecting the first electrode away from the second electrode, the connector is used to be electrically connected to the external power source, and the connector is located on a side of the insulating member away from the first end.

9. The heating component according to claim 2, characterized in that: The second electrode abuts against the second end surface.

10. The heating component according to claim 9, characterized in that: The second electrode includes a mounting portion and a protrusion formed on the mounting portion, wherein the protrusion extends into the inner tube and faces the first electrode.

11. The heating component according to any one of claims 1 to 10, characterized in that: Along the axial direction of the inner tube, a distance between the first end and a position where the first electrode is exposed from the inner tube is greater than or equal to 2 mm.

12. The heating component according to any one of claims 1 to 10, characterized in that: The shortest distance between the conductive member and a position where the first electrode is exposed from the inner tube is greater than or equal to 2 mm.

13. The heating component according to any one of claims 1 to 10, characterized in that: The heating component includes a connection wire connected to the first end, the connection wire is used to be electrically connected to the external power source, and an extension direction of the connection wire forms a preset angle with the axial direction of the inner tube.

14. The heating component according to claim 1, characterized in that: The first electrode is columnar, and the diameter of the first electrode is in the range of 0.4 mm to 1.0 mm.

15. The heating component according to claim 1, characterized in that: The discharge arc length between the second electrode and the first electrode is 2mm≤L≤10mm.

16. The heating component according to claim 1, characterized in that: The discharge arc length between the second electrode and the first electrode is 6mm<L≤10mm.

17. The heating component according to claim 1, characterized in that: The conductive member is in a tubular shape and is sleeved outside the inner tube. The first end and the second end are two axial ends of the conductive member respectively.

18. The heating component according to claim 17, characterized in that: The conductive member is formed with a hollow portion, and the hollow portion is located between the first end portion and the second end portion.

19. The heating component according to claim 17, characterized in that: The conductive member is in close contact with the outer wall of the inner tube, or a gap between the conductive member and the outer wall of the inner tube is less than or equal to 0.1 mm.

20. The heating component according to claim 17, characterized in that: The wall thickness of the conductive member ranges from 0.05 mm to 0.2 mm.

21. The heating component according to claim 1, characterized in that: The heating component comprises an infrared radiation film, and the infrared radiation film is arranged on the inner tube, the outer tube and / or the conductive member.

22. The heating component according to claim 1, characterized in that: The outer tube is used to contact the atomized medium, the second electrode and the second end are both located in the outer tube, the first end is at least partially located outside the outer tube or the end surface of the first end is substantially flush with the lower end surface of the outer tube.

23. The heating component according to claim 22, characterized in that: A heat-insulating gap is formed between the inner tube and the conductive member and the inner wall surface of the outer tube.

24. The heating component according to claim 23, characterized in that: The range of the thermal insulation gap is 0.05mm-0.3mm.

25. The heating component according to claim 22, characterized in that: The heating component comprises an elastic member, the elastic member is sleeved outside the end of the outer tube away from the second electrode, and the inner tube passes through the elastic member.

26. The heating component according to claim 22, characterized in that: The heating component includes a temperature measuring component connected to the outer tube, and the temperature measuring component is used to detect the temperature of the outer tube.

27. The heating component according to claim 26, characterized in that: The temperature measuring component is a temperature measuring film arranged on the wall of the outer tube, or a temperature measuring probe arranged on the outer wall of the outer tube.

28. A heating component, characterized in that: include: An outer tube and an inner tube, wherein the outer tube is sleeved outside the inner tube; a first electrode, the first electrode being at least partially disposed in the inner tube; a second electrode, at least a portion of which is disposed at one end of the inner tube and is disposed opposite to and spaced from the first electrode, wherein plasma is generated between the second electrode and the first electrode when the first electrode and the second electrode are energized; and A conductive member is connected to an external power source along a first direction, and the first electrode extends along a second direction and is connected to the external power source, and the first direction is different from the second direction.

29. An aerosol generating device, characterized in that: include The heating component according to any one of claims 1 to 28.

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