An aerosol generating device

Abstract

This application discloses an aerosol generating device, including a microwave heating structure, a resistance heating structure, and a power supply. The microwave heating structure includes an outer conductor and an inner conductor. A resonant cavity is formed in the outer conductor, and the inner conductor is disposed at the bottom of the resonant cavity and coaxially with it. The top of the inner conductor and the top of the resonant cavity form a microwave heating gap. The resistance heating structure is connected to the outer conductor and is arranged around it to form a heating channel. One end of the heating channel is connected to the resonant cavity, and the other end is open for insertion of the aerosol generating matrix. The heating channel is coaxial with the resonant cavity and is used to heat the outer periphery of the aerosol generating matrix. The power supply is electrically connected to the microwave heating structure and the resistance heating structure. Using the aerosol generating device of this application can improve the heating temperature and heating uniformity of the aerosol generating matrix, thereby improving the inhalation experience.

Description

Technical Field

[0001] This application relates to the field of electronic atomization technology, and in particular to an aerosol generating device. Background Technology

[0002] The principle of microwave heating is that polar molecular materials oscillate and rub against each other in a high-frequency electric field environment to generate heat. The heated medium (aerosol generating matrix) has no heat transfer process and can quickly couple power to generate heat. Heating with microwaves as the heating energy can quickly heat and generate aerosols without the need for long preheating.

[0003] In related technologies, aerosol generating devices utilize a quarter-wavelength resonant cavity for microwave heating; however, the following problems still exist. First, the electric field in the heating zone formed by the inner conductor and the upper resonant cavity is uneven. This results in a strong electric field near the inner conductor, leading to higher temperatures during heating, while the electric field is weaker further away, resulting in lower temperatures during heating, causing uneven heating. Second, the low design electric field strength, placing the entire aerosol generating matrix within the microwave field, leads to unconcentrated heating power, slow heating rates, and longer waiting times. Third, based on the principle of microwave dielectric loss heating, and because the aerosol generating matrix is ​​a mixture, it contains high-loss, low-boiling-point media, such as water and some flavoring substances. These substances will be released first through atomization, resulting in significant differences in composition during each vaping session and noticeable inconsistencies in taste and flavor. Fourth, the e-liquid formed from the generated aerosol risks seeping into the resonant cavity, reducing microwave heating efficiency. Utility Model Content

[0004] To solve at least one of the above-mentioned technical problems, this application provides an aerosol generating device that can increase the heating temperature and heating uniformity of the aerosol generating matrix, thereby improving the smoking experience. The technical solution adopted is as follows.

[0005] The aerosol generating device provided in this application includes a microwave heating structure, a resistance heating structure, and a power supply. The microwave heating structure includes an outer conductor and an inner conductor. A resonant cavity is formed in the outer conductor. The inner conductor is disposed at the bottom of the resonant cavity and is coaxially arranged with the resonant cavity. The top of the inner conductor and the top of the resonant cavity form a microwave heating gap. The resistance heating structure is connected to the outer conductor and is arranged around it to form a heating channel. One end of the heating channel is connected to the resonant cavity, and the other end is open for insertion of the aerosol generating matrix. The heating channel is coaxially arranged with the resonant cavity and is used to heat the outer periphery of the aerosol generating matrix. The power supply is electrically connected to the microwave heating structure and the resistance heating structure.

[0006] In some embodiments of this application, the microwave heating structure includes an upper shell and a lower shell. The upper shell has an opening for inserting an aerosol generating matrix. The lower shell has a support boss coaxially arranged extending along the axial direction. The support boss is spaced apart from the inner wall of the lower shell. The upper shell and the lower shell are connected to each other and the enclosed internal space constitutes the resonant cavity. The upper shell and the lower shell constitute the outer conductor, and the support boss forms the inner conductor. The resistance heating structure includes a heating tube. One end of the heating tube is connected to the support boss, and the other end is connected to the outer conductor and communicates with the opening. The support boss and the heating tube are coaxially arranged. The gap between the support boss and the upper shell constitutes the microwave heating gap, and the space in the heating tube forms the heating channel.

[0007] In some embodiments of this application, the heating tube is provided with at least a microwave transmission section and a resistance heating section connected in sequence along the axial direction. The microwave transmission section is correspondingly disposed in the microwave heating gap, and the resistance heating section is disposed in the opening. The resistance heating section is used to heat the outer periphery of the aerosol generating matrix.

[0008] In some embodiments of this application, the heating tube includes an insulating tube body, and the insulating tube body has a resistive heating film on the surface of the resistive heating section.

[0009] In some embodiments of this application, the upper housing includes a first portion and a second portion connected to the first portion. One end of the first portion is connected to the lower housing, and the other end of the first portion is connected to the second portion. The inner conductor and the second portion are spaced apart to form the microwave heating gap. One end of the heating tube is connected to the support boss, and the other end is disposed inside the second portion.

[0010] In some embodiments of this application, the second part of the upper housing is configured as a support tube, the support tube is coaxial with and spaced apart from the first part, the support tube extends toward the support boss, and the bottom end of the support tube and the top end of the support boss form the microwave heating gap.

[0011] The inner wall of the support boss is provided with a support step, one end of the heating tube abuts in the support step, the other end of the heating tube is disposed in the support tube, and the part of the heating tube inserted into the support tube is configured as a resistance heating section.

[0012] In some embodiments of this application, the heating tube is further provided with a temperature measuring section along the axial direction. The temperature measuring section is disposed on the outer periphery of the portion of the heating tube that cooperates with the supporting step. The heating tube includes an insulating tube body, and the insulating tube body is provided with a temperature measuring and heating film on the surface of the temperature measuring section.

[0013] In some embodiments of this application, the support boss is provided with a receiving groove for accommodating the bottom of the aerosol generating matrix, and the receiving groove is coaxially arranged with the heating tube.

[0014] In some embodiments of this application, the second part of the upper housing is further provided with an extensional structure. The extensional structure extends in a direction away from the lower housing. The extensional structure is provided with a smoke channel communicating with the resonant cavity. The smoke channel, the heating tube, and the receiving groove are coaxially arranged. The smoke channel is used for inserting an aerosol generating matrix.

[0015] In some embodiments of this application, the axial dimension of the microwave heating slit is 0.2 mm to 8 mm.

[0016] In some embodiments of this application, the resonant cavity is provided with a filler.

[0017] In some embodiments of this application, the top and / or bottom of the filler are provided with flexible pads for fixing the filler.

[0018] In some embodiments of this application, the inner conductor and the resonant cavity are coaxially arranged, and the inner conductor and the outer conductor form a coaxial resonator.

[0019] In some embodiments of this application, the top end of the inner conductor is used to contact the bottom end of the aerosol generating matrix.

[0020] In some embodiments of this application, the outer conductor includes a first portion and a second portion connected to the first portion. One end of the first portion is a closed end, and the other end of the first portion is connected to the second portion. The inner conductor is disposed within the first portion, and one end of the inner conductor is connected to the closed end, while the other end extends toward the second portion. The inner conductor and the second portion are spaced apart to form the microwave heating gap.

[0021] The heating channel is formed within the second part.

[0022] In some embodiments of this application, the axial dimension of the microwave heating slit is 0.5 mm to 8 mm.

[0023] In some embodiments of this application, the resistance heating structure includes a heating element, which is a resistance heating trajectory formed on the second part; or, the heating element is one of a heating resistance wire or a flexible heating element disposed on the second part.

[0024] In some embodiments of this application, the outer periphery of the heating channel is further provided with a heat insulation structure, which is used to insulate the heat of the heating channel.

[0025] In some embodiments of this application, the aerosol generating device further includes a control unit and a microwave power transmitter. The control unit is signal-connected to the power supply and the microwave power transmitter. The microwave power transmitter is connected to the microwave heating structure and is used to feed electric field energy into the microwave heating structure. The control unit is used to control the output power of the microwave power transmitter.

[0026] In some embodiments of this application, a first temperature measuring structure is provided at the top of the inner conductor. The first temperature measuring structure is used to detect the temperature of the aerosol generating matrix. The first temperature measuring structure is signal-connected to the control unit. The control unit is used to control the output power of the microwave power transmitter according to the temperature measured by the first temperature measuring structure.

[0027] In some embodiments of this application, the inner wall of the heating channel is further provided with a second temperature measuring structure. The second temperature measuring structure is used to detect the temperature of the aerosol generating matrix. The signal of the second temperature measuring structure is connected to the control unit. The control unit is used to control the output power of the power supply to the resistance heating structure according to the temperature measured by the second temperature measuring structure.

[0028] The embodiments of this application have at least the following beneficial effects: By simultaneously setting up a microwave heating structure and a resistance heating structure, the aerosol generating device can have both microwave heating and resistance heating atomization functions. When the aerosol generating matrix is ​​inserted into the aerosol generating device, a part (bottom) of the aerosol generating matrix is ​​located in the microwave heating gap, and another part (the part other than the bottom) is located in the heating channel. In this way, different parts of the aerosol generating matrix can be heated by two different heating structures simultaneously. The part located in the microwave heating gap generates heat through microwave radiation, causing the molecules in the aerosol generating matrix to oscillate and rub against each other in a high-frequency electric field environment. Therefore, it can be quickly heated to the target temperature, thereby releasing the aerosol and achieving the effect of shortening the waiting time and quickly meeting the user's inhalation needs. The part of the aerosol generating matrix located in the heating channel is heated by the principle of resistance heating. Since the resistance heating structure and the microwave heating structure are distributed along the axial direction of the aerosol generating matrix, they can provide multi-point heating of the aerosol generating matrix in the axial direction, thereby improving the uniformity of the temperature field distribution, overcoming the problems of heat concentration and uneven heating, and thus helping to improve the consistency of the aerosol's taste. Attached Figure Description

[0029] The present application will be further illustrated below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments illustrated in the following drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0030] Figure 1 This is a schematic diagram of an example of the aerosol generating device provided in Embodiment 1 of this application;

[0031] Figure 2 for Figure 1 AA cross-section view;

[0032] Figure 3 This is a schematic diagram of the upper housing of the aerosol generating device provided in Embodiment 1 of this application;

[0033] Figure 4 This is a schematic diagram of the lower housing of the aerosol generating device provided in Embodiment 1 of this application;

[0034] Figure 5 This is a schematic diagram of the heating tube of the aerosol generating device provided in Embodiment 1 of this application;

[0035] Figure 6 A cross-sectional view of another example of the aerosol generating apparatus provided in Embodiment 1 of this application;

[0036] Figure 7 This is a schematic diagram of the structure of the filler and flexible gasket in the aerosol generating device provided in Embodiment 1 of this application;

[0037] Figure 8 This is an exploded view of the filler and flexible gasket in the aerosol generating device provided in Embodiment 1 of this application;

[0038] Figure 9 This is a schematic diagram of the structure of the aerosol generating device provided in Embodiment 1 of this application after being inserted into the aerosol generating matrix;

[0039] Figure 10 for Figure 9 BB cross-section;

[0040] Figure 11 This is a schematic diagram of the electric field distribution of the aerosol generating device provided in Embodiment 1 of this application.

[0041] Figure 12 This is a schematic diagram of the electric field distribution in an aerosol generating device in related technologies;

[0042] Figure 13 This is a schematic diagram of the aerosol generating device provided in Embodiment 2 of this application;

[0043] Figure 14 for Figure 13 AA section view;

[0044] Figure 15 This is a partially exploded view of the aerosol generating device provided in Embodiment 2 of this application from an AA cross-sectional perspective.

[0045] Figure 16 for Figure 13 A partial exploded view from the BB cross-sectional perspective;

[0046] Figure 17 A schematic diagram of another example of the aerosol generating device provided in Embodiment 2 of this application;

[0047] Figure 18 This is a schematic diagram of the electric field distribution of the aerosol generating device provided in Embodiment 2 of this application;

[0048] Figure 19 This is a schematic diagram of the control relationship of the aerosol generating device provided in Embodiment 2 of this application.

[0049] Reference numerals: 100, Aerosol generating device; 10, Microwave heating structure; D, Microwave heating gap; 11, Outer conductor; 111, Resonant cavity; 112, First part; 113, Second part; 12, Inner conductor; 13, Upper shell; 131, Opening; 132, Support tube; 133, Extensional structure; 1331, Cigarette channel; 14, Lower shell; 141, Support boss; 1411, Support step; 1412, Receiving groove; 15, Filler; 16, Flexible gasket; 161, Protruding structure; 20, Resistance heating structure; 21 1. Heating channel; 22. Heating tube; 221. Microwave transmission section; 222. Resistance heating section; 223. Temperature measuring section; 23. Insulating tube body; 24. Resistance heating film; 25. Temperature measuring heating film; 26. Guide component; 30. Power supply; 31. Battery; 32. DC-DC step-up / step-down power supply; 40. Thermal insulation structure; 50. Control unit; 60. Microwave power transmitter; 70. Housing; 80. Feeding structure; 90. Temperature measuring structure; 91. First temperature measuring structure; 92. Second temperature measuring structure; 200. Aerosol generating matrix; 201. Tobacco section. Detailed Implementation

[0050] The embodiments of this application are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0051] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0053] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] In the description of this application, the use of terms such as "as one implementation," "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Example 1

[0056] Please see Figures 1 to 4This application provides an aerosol generating device 100, including a microwave heating structure 10, a resistance heating structure 20, and a power supply. The microwave heating structure 10 includes an outer conductor 11 and an inner conductor 12. A resonant cavity 111 is formed in the outer conductor 11. The inner conductor 12 is disposed at the bottom of the resonant cavity 111 and coaxially arranged with it. The top end of the inner conductor 12 forms a microwave heating gap with the top end of the resonant cavity 111. The resistance heating structure 20 is connected to the outer conductor 11 and is arranged around it to form a heating channel 21. One end of the heating channel 21 is connected to the resonant cavity 111, and the other end is open for insertion of an aerosol generating matrix 200. The heating channel 21 is coaxially arranged with the resonant cavity 111 and is used to heat the outer periphery of the aerosol generating matrix 200. The power supply is electrically connected to the microwave heating structure 10 and the resistance heating structure 20.

[0057] By simultaneously configuring the microwave heating structure 10 and the resistance heating structure 20, the aerosol generating device 100 can possess both microwave heating and resistance heating atomization functions. When the aerosol generating matrix 200 is inserted into the aerosol generating device 100, a portion (the bottom) of the aerosol generating matrix 200 is located in the microwave heating gap, while the other portion (the portion other than the bottom) is located in the heating channel 21. In this way, different portions of the aerosol generating matrix 200 can simultaneously heat two different heating structures. The portion located in the microwave heating gap generates heat through microwave radiation, causing the molecules within the aerosol generating matrix 200 to oscillate and rub against each other in a high-frequency electric field environment. Therefore, it can be quickly heated to the target temperature, thereby releasing the aerosol and achieving the effect of shortening the waiting time and quickly meeting the user's suction needs. The portion of the aerosol generating matrix 200 located in the heating channel 21 is heated by resistance heating. Since the resistance heating structure 20 and the microwave heating structure 10 are distributed along the axial direction of the aerosol generating matrix 200, they can provide multi-point heating to the aerosol generating matrix 200 in the axial direction, thereby improving the uniformity of the temperature field distribution, overcoming the problems of heat concentration and uneven heating, and thus helping to improve the consistency of the aerosol's taste.

[0058] Please combine Figure 11 and Figure 12When microwaves are applied, the microwave-heated slit D can form a slit capacitance. This slit capacitance causes the inner conductor 12 and the outer conductor 11 to form a capacitively loaded coaxial resonator, allowing the energy of the electric field to be concentrated at the slit. When the aerosol generating matrix 200 is inserted into the resonant cavity 111, a portion of the aerosol generating matrix 200 (e.g., tobacco segment 201) is located in the microwave-heated slit D. Therefore, the electric field energy can heat the aerosol generating matrix 200, and the microwave electric field can rapidly raise the temperature of the aerosol generating matrix 200 to the atomization temperature, thereby achieving the effect of rapid aerosol generation. The aerosol generating device 100 provided in this application can form a heating electric field with a more uniform field strength distribution within the resonant cavity 111. Figure 11 Compared to the electric field distribution of resonant cavities in related technologies, Figure 12 It has a better and more uniform heating effect.

[0059] In some embodiments, the microwave heating structure 10 includes an upper shell 13 and a lower shell 14. The upper shell 13 has an opening 131 for inserting an aerosol generating matrix 200. The lower shell 14 has a support boss 141 coaxially arranged and extending axially. The support boss 141 is spaced apart from the inner wall of the lower shell 14. The upper shell 13 and the lower shell 14 are connected to each other and the enclosed internal space constitutes a resonant cavity 111. The upper shell 13 and the lower shell 14 constitute an outer conductor 11, and the support boss 141 is formed as an inner conductor 12. The resistance heating structure 20 includes a heating tube 22. One end of the heating tube 22 is connected to the support boss 141, and the other end is connected to the outer conductor 11 and communicates with the opening 131. The support boss 141 and the heating tube 22 are coaxially arranged. The gap between the support boss 141 and the upper shell 13 constitutes a microwave heating gap D. The space in the heating tube 22 forms a heating channel 21. The outer conductor 11 and the resonant cavity 111 are constructed by assembling the upper shell 13 and the lower shell 14 together, which helps to reduce the processing and assembly difficulty of the microwave heating structure 10, making the structure of the outer conductor 11, inner conductor 12, and resonant cavity 111 easier to realize. By setting the support boss 141, on the one hand, it can be used to support and fix the bottom of the aerosol generating matrix 200, improving the stability of the aerosol generating matrix 200 during insertion; on the other hand, the support boss 141 and the upper shell 13 can jointly fix the heating tube 22 along the axial direction, thereby improving the installation stability and reliability of the heating tube 22. For example, before assembling the upper shell 13 and the lower shell 14, one end of the heating tube 22 can be fixed in the upper shell 13 or installed and fixed in the support boss 141 of the lower shell 14. When the upper shell 13 and the lower shell 14 are assembled together, the other end of the heating tube 22 is further connected to the lower shell 14 or the upper shell 13, thereby fixing the heating tube 22 in the resonant cavity 111. Optionally, the support boss 141 and the lower housing 14 can be integrally formed.

[0060] Optionally, the cross-sectional shape of the outer conductor 11 can be circular, elliptical, polygonal, etc. The axis of the heating tube 22 is set to coincide with the center of the circle, the center of the ellipse, or the center of the polygon.

[0061] In some embodiments, please refer to Figure 5 The heating tube 22 is provided with at least one microwave-transmitting section 221 and a resistance heating section 222 connected sequentially along the axial direction. The microwave-transmitting section 221 is correspondingly disposed in the microwave heating gap D, and the resistance heating section 222 is disposed in the opening 131. The resistance heating section 222 is used to heat the outer periphery of the aerosol generating matrix 200. By segmenting the heating tube 22, on the one hand, it can be ensured that the part of the heating tube 22 located in the microwave heating gap D allows microwaves to pass through, ensuring that the microwave energy in the resonant cavity 111 can be fed into the aerosol generating matrix 200, reducing the influence of the presence of the heating tube 22 on microwave propagation; on the other hand, the arrangement of the resistance heating section 222 ensures that the heating tube 22 can perform the function of resistance heating.

[0062] Optionally, the microwave-transmitting section 221 refers to a section that allows microwaves to pass through or has low microwave loss performance. Therefore, the microwave-transmitting section 221 can be made of materials such as quartz glass, ceramics, or polymers.

[0063] In some embodiments, the heating tube 22 includes an insulating tube body 23, on which a resistive heating film 24 is provided on the surface of the resistive heating section 222. By using an insulating tube body 23 for the entire tube and providing the resistive heating film 24 only in the section requiring resistive heating, it means that no conductive material is provided on the surface of the microwave-transmitting section 221. Thus, the insulating tube body 23 can selectively provide heating in the resistive heating section 222, while remaining non-heating in the microwave-transmitting section 221, satisfying the requirement for segmented arrangement of the heating tube 22. Using the selective provision of the resistive heating film 24 on the surface of the insulating tube body 23 to construct the resistive heating section 222 simplifies the structure and processing of the heating tube 22, making its structure easier to implement. Furthermore, this arrangement allows for an integrated design of the entire heating tube 22, eliminating the need for assembling multiple sub-segments for different functional sections. This helps improve the overall strength and reliability of the heating tube 22 and reduces its manufacturing difficulty.

[0064] Optionally, the resistive heating film 24 can be realized by processes such as thick film printing or vacuum sputtering. Specifically, the resistive heating film can be a metal heating circuit trace, a metal or non-metal heating film coating, a heating conductor circuit built into or embedded in or covered by the insulating tube 23, etc.

[0065] Optionally, please refer to Figure 9 and Figure 10The aerosol generating matrix 200 has a tobacco shred segment 201, in which tobacco shreds or flavoring substances for generating aerosols are centrally arranged. The tobacco shred segment 201 is arranged corresponding to the heating tube 22. That is, along the axial direction of the heating channel 21, the tobacco shred segment 201 and the heating tube 22 are basically overlapped. In this way, the microwave transmission section 221 in the heating tube 22 can allow microwaves to pass through and microwave heat the tobacco shred segment 201. The resistance heating section 222 of the heating tube 22 can simultaneously resistively heat the tobacco shred segment 201, so that the tobacco shred segment 201 can be heated comprehensively and evenly, improving the taste and experience of the user inhaling the aerosol.

[0066] In some embodiments, please combine Figures 2 to 4 as well as Figure 6 The upper housing 13 includes a first part 112 and a second part 113 connected to the first part 112. One end of the first part 112 is connected to the lower housing 14, and the other end of the first part 112 is connected to the second part 113. The inner conductor 12 and the second part 113 are spaced apart to form a microwave heating gap D. One end of the heating tube 22 is connected to the support boss 141, and the other end is disposed inside the second part 113. In this way, the microwave heating structure 10 and the resistance heating structure 20 can be arranged together by using the outer conductor 11, making the structure of the aerosol generating device 100 more compact.

[0067] In some embodiments, the second part 113 of the upper housing 13 is configured as a support tube 132, which is coaxial with and spaced apart from the first part 112. The support tube 132 extends toward the support boss 141, and the bottom end of the support tube 132 and the top end of the support boss 141 form a microwave heating gap D. The inner wall of the support boss 141 is provided with a support step 1411, one end of the heating tube 22 abuts in the support step 1411, and the other end of the heating tube 22 is disposed in the support tube 132. The portion of the heating tube 22 inserted into the support tube 132 is configured as a resistance heating section 222. By providing a support tube 132 in the upper housing 13 and placing one end of the heating tube 22 in the support tube 132, the top end of the heating tube 22 can be supported and fixed by the support tube 132, thereby improving the installation stability of the heating tube 22 in the resonant cavity 111. On the other hand, the support tube 132, as part of the upper housing 13 extending into the resonant cavity 111, allows for adjustment of the microwave heating gap D by setting its extension length, thus enabling flexible setting of the microwave heating gap D. The support step 1411 in the support boss 141 not only further improves the fitting accuracy between the heating tube 22 and the support boss 141, but also increases the contact area between the support boss 141 and the heating tube 22, improving the installation stability of the heating tube 22. Furthermore, since the heating tube 22 and the support boss 141 have an axial overlap, the e-liquid generated by the aerosol generating matrix 200 after generating aerosol can be blocked by the heating tube 22 within the heating channel 21, preventing e-liquid leakage into the resonant cavity 111.

[0068] According to the heating principle of slot capacitors, the narrower the slot, the larger the applied capacitance. In some embodiments, the axial dimension of the microwave heating slot is 0.2mm to 8mm. For example, the microwave heating slot can be 0.2mm, 0.3mm, 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.9mm, 1.2mm, 3mm, 5mm, 7mm, 8mm, etc. The specific size of the microwave heating slot can be flexibly set according to the rated power of the aerosol generating device 100100, heating requirements, etc., and is not specifically limited here.

[0069] In some embodiments, the heating tube 22 is further provided with a temperature measuring section 223 along the axial direction. The temperature measuring section 223 is disposed on the outer periphery of the portion of the heating tube 22 that fits into the supporting step 1411. The heating tube 22 includes an insulating tube body 23, and a temperature measuring and heating film 25 is provided on the surface of the temperature measuring section 223. Since the bottom end of the heating tube 22 fits into the supporting step 1411, and this portion of the heating tube 22 does not need to perform a heating function, this portion is set as the temperature measuring section 223. On the one hand, the bottom of the heating tube 22 can be fully utilized. On the other hand, the temperature measuring section 223 can detect the temperature in the heating channel 21, thereby adjusting the microwave heating power according to the temperature in the heating channel 21, further realizing the temperature control effect of the aerosol generating device 100, and achieving uniform and reasonable heating.

[0070] For example, the surface of the temperature measuring section 223 may be provided with a heating film having TCR characteristics.

[0071] In some embodiments, the aerosol generating device 100 further includes a control unit (not shown) and a microwave power transmitter (not shown). The control unit is signal-connected to a power supply and the microwave power transmitter. The microwave power transmitter is connected to the microwave heating structure 10 and is used to feed electric field energy into the microwave heating structure 10. The control unit is used to control the output power of the microwave power transmitter. A temperature measuring section 223 is electrically connected to the control unit. The control unit controls the output power of the microwave power generator according to the temperature measured by the temperature measuring section 223. By controlling the output power of the microwave power transmitter using the control unit, the temperature of the microwave heating structure 10 can be controlled within a suitable range, thereby enabling the aerosol generating matrix 200 to release aerosols stably and uniformly, thus reducing the safety risks it poses. Therefore, by setting the temperature measuring section 223, the temperature of the bottom of the aerosol generating matrix 200 can be obtained in a timely manner. The control unit adjusts the output power of the microwave power transmitter according to the temperature measured by the temperature measuring section 223, thereby forming a temperature control closed loop, which helps to achieve more intelligent control of the heating temperature of the aerosol generating matrix 200.

[0072] Optionally, the microwave power transmitter can be one of a radio frequency oscillation circuit, a radio frequency amplification circuit, or a self-excited circuit. The control unit can be a control circuit board, a microcontroller, a controller, etc. The microwave power transmitter is connected to the microwave heating structure 10 through a feed structure 80. Exemplarily, the feed structure 80 can be a coaxial transmission line interface, with its outer conductor 11 in good electrical contact with the surface of the outer conductor 11 of the resonator cavity, and the inner conductor 12 forming a magnetic ring structure on the short-circuit surface under the resonator, or forming an excitation capacitor at the gap end.

[0073] In some embodiments, the support boss 141 is provided with a receiving groove 1412, which is used to receive the bottom of the aerosol generating matrix 200. The receiving groove 1412 is coaxially arranged with the heating tube 22. By providing the receiving groove 1412 in the support, the bottom of the aerosol generating matrix 200 can be fixed in the receiving groove 1412, thereby improving the stability of the aerosol generating matrix 200 when inserted into the resonant cavity 111.

[0074] In some embodiments, the second part 113 of the upper housing 13 is further provided with an extension structure 133. The extension structure 133 extends in a direction away from the lower housing 14. The extension structure 133 has a smoke channel 1331 communicating with the resonant cavity 111. The smoke channel 1331, the heating tube 22 and the receiving groove 1412 are coaxially arranged. The smoke channel 1331 is used for inserting the aerosol generating matrix 200. The extension structure 133 can help fix the aerosol generating matrix 200 and guide the aerosol generating matrix 200 through the smoke channel 1331, the heating tube 22 (heating channel 21) and the receiving groove 1412 in sequence, thereby improving the installation stability of the aerosol generating matrix 200.

[0075] In some embodiments, please combine Figures 6 to 8 The resonant cavity 111 is provided with a filler 15, which fills the space between the outer periphery of the support tube 132 and the support boss 141 and the inner walls of the upper housing 13 and the lower housing 14. By providing the filler 15, since the dielectric constant of the filler 15 is greater than that of air, the wavelength of the microwave can be compressed while ensuring that the resonant frequency remains unchanged, thereby reducing the size of the resonant cavity 111 and contributing to the compact and miniaturized design of the aerosol generating device 100. For example, the filler 15 can be made of materials such as quartz or ceramic.

[0076] In some embodiments, a flexible pad 16 is provided at the top or bottom of the filler 15, or both the top and bottom of the filler 15 are provided with flexible pads 16, which are used to fix the filler 15. Providing a flexible pad 16 not only prevents the filler 15 from shaking in the resonant cavity 111, but also prevents the flexible pad 16 itself from being heated by the electric field, thereby improving the consistency during microwave heating.

[0077] Optionally, the flexible gasket 16 can be a silicone sheet. A protrusion structure 161 can be provided on the surface of the flexible gasket 16 facing the filler 15. The protrusion structure 161 and the filler 15 have a mutual squeezing effect, thereby increasing the bonding strength between the flexible gasket 16 and the filler 15 and improving the fixing effect of the flexible gasket 16 on the filler 15, effectively preventing the filler 15 from shaking in the resonant cavity 111.

[0078] Example 2

[0079] Please see Figures 13 to 16 This application provides an aerosol generating device 100, including a microwave heating structure 10, a resistance heating structure 20, and a power supply 30. The microwave heating structure 10 includes an outer conductor 11 and an inner conductor 12. A resonant cavity 111 is formed in the outer conductor 11, and the inner conductor 12 is disposed at the bottom of the resonant cavity 111, with its top end contacting the bottom end of an aerosol generating matrix 200. The resistance heating structure 20 is connected to the outer conductor 11 and is arranged around it to form a heating channel 21. One end of the heating channel 21 is connected to the resonant cavity 111, and the other end is open for insertion of the aerosol generating matrix 200. The heating channel 21 is coaxially arranged with the resonant cavity 111 and is used to heat the outer periphery of the aerosol generating matrix. The power supply 30 is electrically connected to the microwave heating structure and the resistance heating structure 20.

[0080] By simultaneously setting up a microwave heating structure 10 and a resistance heating structure 20, the aerosol generating device 100 can have both microwave heating and resistance heating atomization functions. When the aerosol generating matrix 200 is inserted into the aerosol generating device 100, a part (bottom) of the aerosol generating matrix 200 is located in the resonant cavity 111, and another part (the part other than the bottom) is located in the heating channel 21. In this way, different parts of the aerosol generating matrix 200 can simultaneously heat two different heating structures. The part located in the resonant cavity 111 generates heat through microwave radiation, causing the molecules in the aerosol generating matrix 200 to oscillate and rub against each other in a high-frequency electric field environment. Therefore, it can be quickly heated to the target temperature, thereby releasing the aerosol and achieving the effect of shortening the waiting time and quickly meeting the user's suction needs. The portion of the aerosol generating matrix 200 located within the heating channel 21 is heated using resistance heating. Since the resistance heating structure forms the inner wall of the heating channel 21, this inner wall maintains a high temperature during operation. Even when the aerosol encounters the inner wall of the heating channel 21, it cannot condense, thus solving problems such as contamination and radio frequency matching failure caused by aerosol condensation on the inner wall of the metal cavity. Furthermore, because the resistance heating structure 20 and the radio frequency heating structure are distributed along the axial direction of the aerosol generating matrix 200, they can provide multi-point heating along the axial direction, thereby improving the uniformity of the temperature field distribution and overcoming the problems of concentrated heat and uneven heating, thus contributing to improved consistency in the aerosol's taste. In addition, the inclusion of the resistance heating structure 20 can share some of the heating function with microwave heating, allowing for a reduction in the power, structure, and energy consumption of the microwave power transmitter 60 (microwave source). This helps reduce the capacity of the battery 31 and the overall size of the device, enabling a miniaturized design of the aerosol generating device 100 and improving the user experience.

[0081] In some embodiments, the inner conductor 12 and the resonant cavity 111 are coaxially arranged, forming a coaxial resonator with the outer conductor 11. The coaxial arrangement of the inner conductor 12 and the resonant cavity 111 helps improve the uniformity of the electric field intensity distribution circumferentially within the resonant cavity 111, thereby creating a uniformly distributed electric field within the resonant cavity 111. This improves the heating effect of the aerosol generating matrix 200 and avoids the problem of inconsistent taste caused by uneven heating of the aerosol generating matrix 200, resulting in locally excessively high temperatures and insufficient temperatures in other areas.

[0082] In some embodiments, a microwave heating gap is formed between the inner conductor 12 and the top of the resonant cavity 111. For example... Figure 18 As shown, the gap capacitance enables the inner conductor 12 and the outer conductor 11 to form a capacitively loaded coaxial resonator. When microwaves are applied to the gap, the microwave-heated gap can form a gap capacitance, allowing the energy of the electric field to be concentrated at the gap. When the aerosol generating matrix 200 is inserted into the resonant cavity 111, the bottom end of the aerosol generating matrix 200 is located in the gap. Therefore, the electric field energy of the gap can heat the aerosol generating matrix 200. The microwave electric field can rapidly heat the bottom of the aerosol generating matrix 200 to the atomization temperature, thereby achieving the effect of rapidly generating aerosols.

[0083] In some embodiments, please refer to Figure 15 and Figure 17 The outer conductor includes a first portion 112 and a second portion 113 connected to the first portion 112. One end of the first portion 112 is a closed end, and the other end of the first portion 112 is connected to the second portion 113. The inner conductor 12 is disposed within the first portion 112, with one end connected to the closed end and the other end extending into the second portion 113. The inner conductor 12 and the second portion 113 are spaced apart to form a microwave heating gap D. A heating channel 21 is formed within the second portion 113. In this way, the microwave heating structure 10 and the resistance heating structure 20 can be disposed together using the outer conductor 11, making the structure of the aerosol generating device 100 more compact.

[0084] in, Figure 15 and Figure 17 The two different setup methods in Part 2, 113, are shown respectively. Figure 15 In the example, one end of the second part 113 is connected to the first part 112, and the other end is a free end, which extends away from the inner conductor 12. Figure 17 In the example, one end of the second part 113 is connected to the first part 112, and the other end is a free end, which extends toward the inner conductor 12.

[0085] According to the heating principle of slot capacitance, the narrower the slot, the larger the applied capacitance. In some embodiments, the size of the microwave heating slot D is from 0.5mm to 8mm. For example, the microwave heating slot D can be 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.9mm, 1.2mm, 3mm, 5mm, 7mm, 8mm, etc. The specific size of the microwave heating slot can be flexibly set according to the rated power of the aerosol generating device 100, heating requirements, etc., and is not specifically limited here.

[0086] In some implementations, the resistance heating structure 20 includes a heating element that forms a resistance heating trajectory on the second part 113, or the heating element is either a heating resistance wire or a flexible heating element disposed on the second part 113. The resistance heating structure 20 heats the aerosol generating matrix 200 using Joule heating, specifically by energizing the resistance heating trajectory in the heating element and transferring the heat to the aerosol generating matrix 200. Because the heating element itself has a high temperature during use, the aerosol generated will not condense upon encountering the inner wall of the heating channel 21, thus ensuring good cleanliness of the inner wall of the heating channel 21.

[0087] Optionally, the heating element can be disposed on the inner or outer surface of the second part 113, without specific limitation.

[0088] In some embodiments, a heat insulation structure 40 is also provided on the outer periphery of the heating channel 21. The heat insulation structure 40 is used to insulate the heat of the heating channel 21. On the one hand, the heat insulation structure 40 helps to prevent heat loss to the outside, thereby keeping the heating channel 21 warm and ensuring that the heating channel 21 can be maintained at a suitable operating temperature, reducing heat waste. On the other hand, the heat insulation structure 40 can also prevent the outer periphery temperature of the aerosol generating device 100 from becoming too high and causing burns to the user, ensuring that the aerosol generating device 100 has sufficient safety performance during use.

[0089] In some embodiments, electromagnetic shielding needs to be considered when designing the microwave heating structure 10 to ensure that electromagnetic waves outside the resonant cavity 111 are reduced to a safe range to meet electromagnetic wave shielding requirements. Therefore, a cutoff waveguide can be set in the microwave heating structure 10, that is, by controlling the length, inner diameter, and microwave frequency of the resonant cavity 111 within a reasonable range, the electromagnetic waves outside the resonant cavity 111 can be attenuated to a low level. At the same time, due to this energy attenuation, more energy will be concentrated at the bottom of the aerosol generating matrix 200 (e.g., Figure 18The electric field simulation shown demonstrates this, but areas outside the bottom (e.g., the upper half) struggle to obtain sufficient heating energy. Therefore, this application positions the resistance heating structure 20 above the microwave heating structure 10 along the axial direction of the aerosol generating matrix 200. This ensures sufficient heating for both the upper and lower halves of the entire aerosol generating matrix 200. It is evident that the resistance heating structure 20 can heat the upper half of the aerosol generating matrix 200, and the vertical arrangement of the resistance heating structure 20 and the microwave heating structure 10 helps achieve uniform heating of the aerosol generating matrix 200.

[0090] For example, the inner diameter of the heating channel 21 is the same as the inner diameter of the resonant cavity 111, and the inner diameter of the heating channel 21, the microwave frequency, and the microwave attenuation coefficient satisfy the following relationship: R = λ c / 3.41, Where R is the inner diameter of heating channel 21, λ c λ0 is the cutoff wavelength of the lowest microwave mode in the heating channel 21, α is the microwave wavelength entering the heating channel 21, α is the attenuation coefficient of microwave energy transmitted in the heating channel 21, and 3.41 is the minimum root value of the Bessel function for the lowest mode (dominant mode) TE11 transmitted in the circular waveguide. By setting the inner diameter of the heating channel 21 to satisfy the above relationship, the heating channel 21 can effectively cut off the transmission of frequency electromagnetic waves in the resonant cavity 111, thereby improving the electromagnetic safety of the aerosol generating device 100.

[0091] In some embodiments, a guide member 26 is provided at the end of the heating channel 21 away from the resonant cavity 111. The inner diameter of the guide member 26 gradually decreases along the insertion direction of the aerosol generating matrix 200. The guide member 26 is used to guide the aerosol generating matrix 200 into the heating channel 21. Utilizing the characteristic that one end of the guide member 26 has a large opening and the other end has a small opening, it can guide the aerosol generating matrix 200 when it is inserted into the heating channel 21, making it easier for the aerosol generating matrix 200 to be accurately inserted into place.

[0092] In some embodiments, the aerosol generating device further includes a control unit 50 and a microwave power transmitter 60. The control unit 50 is signal-connected to the power supply 30 and the microwave power transmitter 60. The microwave power transmitter 60 is connected to the microwave heating structure 10 and is used to feed electric field energy into the microwave heating structure 10. The control unit 50 is used to control the output power of the microwave power transmitter 60. By controlling the output power of the microwave power transmitter 60 using the control unit 50, the temperature of the microwave heating structure 10 can be controlled within a suitable range, for example, controlling the temperature of the aerosol generating matrix 200 between 200°C and 350°C. This allows the aerosol generating matrix 200 to stably and uniformly release aerosols without exceeding its maximum withstand temperature of 350°C, thereby reducing the safety risks it poses. Optionally, the microwave power transmitter 60 is connected to the microwave heating structure 10 via a feed structure 80.

[0093] Optionally, the microwave power transmitter 60 can be one of a radio frequency oscillation circuit, a radio frequency amplification circuit, or a self-excited circuit. The transmission frequency is a point frequency or frequency band within the range of 100MHz to 20GHz. The control unit 50 can be a control circuit board, a microcontroller, a controller, etc. The power supply 30 can include a battery 31 and a DC-DC buck-boost power supply 32. The DC-DC buck-boost power supply 32 can include the battery 31 and its buck-boost, voltage regulation, and charging circuits.

[0094] For example, the aerosol generating device 100 may further include a housing 70, which can encapsulate the aforementioned microwave heating structure 10, resistance heating structure 20, power supply 30, control unit 50, microwave power transmitter 60, and other structures. An installation space is formed within the housing 70 to accommodate... Figure 14 For example, the battery 31 of the power supply 30 is located on one side of the installation space, extending along the length of the housing 70. The DC-DC step-up / step-down power supply 32, the control unit 50, and the microwave power transmitter 60 can be assembled and located on the other side of the installation space, at the bottom of the installation space. The top of the installation space is used to accommodate the microwave heating structure 10 and the resistance heating structure 20. The top of the housing 70 is also provided with an insertion port, which connects to the opening of the heating channel 21. The aerosol generating matrix 200 can be inserted into the heating channel 21 and the resonant cavity 111 through the insertion port.

[0095] In some embodiments, a first temperature sensing structure 91 is provided at the top of the inner conductor 12. The first temperature sensing structure 91 is used to detect the temperature of the aerosol generating matrix 200. The signal of the first temperature sensing structure 91 is connected to the control unit 50. The control unit 50 is used to control the output power of the microwave power transmitter 60 according to the temperature measured by the first temperature sensing structure 91. By using the first temperature sensing structure 91, the temperature of the bottom of the aerosol generating matrix 200 can be obtained in a timely manner. The control unit 50 adjusts the output power of the microwave power transmitter 60 according to the temperature measured by the first temperature sensing structure 91, thereby forming a temperature control closed loop, which helps to achieve more intelligent control of the heating temperature of the aerosol generating matrix 200.

[0096] In some embodiments, the inner wall of the heating channel 21 is further provided with a second temperature measuring structure 92. The second temperature measuring structure 92 is used to detect the temperature of the aerosol generating matrix 200. The signal of the second temperature measuring structure is connected to the control unit 50. The control unit 50 is used to control the output power of the power supply 30 to the resistance heating structure 20 according to the temperature measured by the second temperature measuring structure 92. Similarly, the second temperature measuring structure 92 can also be used to detect the temperature of other areas of the aerosol generating matrix 200 besides the bottom. The control unit 50 adjusts the output power of the resistance heating structure 20 according to the temperature measured by the second temperature measuring structure 92, thereby forming a temperature control closed loop, which helps to achieve more intelligent control of the heating temperature of the aerosol generating matrix 200.

[0097] Optionally, the second temperature measuring structure 92 itself can also constitute the heating element of the resistance heating structure 20, that is, the second temperature measuring structure 92 can play both the role of temperature measurement and the role of heating.

[0098] Using the above detection and control methods, the control unit 50 can maintain the heating temperature of both the radio frequency heating structure and the resistance heating structure 20 within a range of approximately 200℃ to 350℃. Optionally, the first temperature measuring structure 91 and the second temperature measuring structure 92 can be a TCR temperature measuring circuit, a thermocouple temperature measuring circuit, a thermistor, etc. Figure 19 A schematic diagram of a control relationship for an aerosol generating device is shown, wherein the temperature measuring structure 90 may include a first temperature measuring structure 91 and a second temperature measuring structure 92.

[0099] As an example, the aerosol generating matrix 200 operates as follows:

[0100] The aerosol generating matrix 200 is inserted into the heating channel 21, and the bottom end of the aerosol generating matrix 200 is inserted into the resonant cavity 111. The heating program is started, and the power supply 30 sends the power to the microwave power transmitter 60 (radio frequency source). The electrical energy of the power supply 30 is converted into radio frequency electromagnetic wave energy and sent into the resonant cavity 111. The control unit 50 controls the power of the microwave power transmitter 60 through the feedback of the first temperature measuring structure, so as to control the bottom of the aerosol generating matrix 200 to quickly and uniformly reach the temperature (200℃~350℃) for releasing aerosols, thereby realizing the rapid release of aerosols.

[0101] At the same time, electricity is supplied to the resistance heating structure 20, and the temperature of the heating channel 21 is rapidly (3 to 40 seconds) raised to (200℃ to 350℃) by the control unit 50, and its temperature is maintained for a period of time according to the program, during which aerosol is released stably and evenly.

[0102] After the temperature control program ends, the control unit 50 stops supplying power to the microwave power transmitter 60 and the resistance heating structure 20, and controls the shutdown.

[0103] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An aerosol generating device, characterized in that: include A microwave heating structure includes an outer conductor and an inner conductor. A resonant cavity is formed in the outer conductor. The inner conductor is disposed at the bottom of the resonant cavity and is coaxially arranged with the resonant cavity. The top of the inner conductor and the top of the resonant cavity form a microwave heating gap. A resistance heating structure is connected to the outer conductor. The resistance heating structure is arranged around the outer conductor to form a heating channel. One end of the heating channel is connected to the resonant cavity, and the other end is open for insertion of the aerosol generating matrix. The heating channel is coaxially arranged with the resonant cavity and is used to heat the outer periphery of the aerosol generating matrix. The power supply is electrically connected to the microwave heating structure and the resistance heating structure.

2. The aerosol generating device according to claim 1, characterized in that: The microwave heating structure includes an upper shell and a lower shell. The upper shell has an opening for inserting an aerosol generating matrix. The lower shell has a support boss coaxially arranged and extending axially. The support boss is spaced apart from the inner wall of the lower shell. The upper shell and the lower shell are connected to each other and the enclosed internal space constitutes the resonant cavity. The upper shell and the lower shell constitute the outer conductor, and the support boss forms the inner conductor. The resistance heating structure includes a heating tube. One end of the heating tube is connected to the support boss, and the other end is connected to the outer conductor and communicates with the opening. The support boss and the heating tube are coaxially arranged. The gap between the support boss and the upper shell constitutes the microwave heating gap, and the space in the heating tube forms the heating channel.

3. The aerosol generating device according to claim 2, characterized in that: The heating tube is provided with at least a microwave transmission section and a resistance heating section connected in sequence along the axial direction. The microwave transmission section is correspondingly arranged in the microwave heating gap, and the resistance heating section is arranged in the opening. The resistance heating section is used to heat the outer periphery of the aerosol generating matrix.

4. The aerosol generating device according to claim 3, characterized in that: The heating tube includes an insulating tube body, and the insulating tube body has a resistive heating film on the surface of the resistive heating section.

5. The aerosol generating device according to claim 2, characterized in that: The upper housing includes a first part and a second part connected to the first part. One end of the first part is connected to the lower housing, and the other end of the first part is connected to the second part. The inner conductor and the second part are spaced apart to form the microwave heating gap. One end of the heating tube is connected to the support boss, and the other end is disposed in the second part.

6. The aerosol generating device according to claim 5, characterized in that: The second part of the upper housing is configured as a support tube, which is coaxial with and spaced apart from the first part. The support tube extends toward the support boss, and the bottom end of the support tube and the top end of the support boss form the microwave heating gap. The inner wall of the support boss is provided with a support step, one end of the heating tube abuts in the support step, the other end of the heating tube is disposed in the support tube, and the part of the heating tube inserted into the support tube is configured as a resistance heating section.

7. The aerosol generating device according to claim 5, characterized in that: The heating tube is also provided with a temperature measuring section along the axial direction. The temperature measuring section is located on the outer periphery of the portion of the heating tube that cooperates with the supporting step. The heating tube includes an insulating tube body, and the insulating tube body is provided with a temperature measuring and heating film on the surface of the temperature measuring section.

8. The aerosol generating device according to claim 5, characterized in that: The support boss is provided with a receiving groove, which is used to receive the bottom of the aerosol generating matrix, and the receiving groove is coaxially arranged with the heating tube.

9. The aerosol generating apparatus according to claim 8, characterized in that: The second part of the upper housing is further provided with an extension structure. The extension structure extends in a direction away from the lower housing. The extension structure is provided with a smoke channel communicating with the resonant cavity. The smoke channel, the heating tube and the receiving groove are coaxially arranged. The smoke channel is used for inserting the aerosol generating matrix.

10. The aerosol generating apparatus according to any one of claims 1 to 9, characterized in that: The axial dimension of the microwave heating slit is 0.2 mm to 8 mm.

11. The aerosol generating apparatus according to any one of claims 1 to 9, characterized in that: The resonant cavity is filled with a filler.

12. The aerosol generating apparatus according to claim 11, characterized in that: The top and / or bottom of the filler are provided with flexible pads for fixing the filler.

13. The aerosol generating device according to claim 1, characterized in that: The inner conductor and the resonant cavity are coaxially arranged, and the inner conductor and the outer conductor form a coaxial resonator.

14. The aerosol generating apparatus according to claim 13, characterized in that: The top end of the inner conductor is used to contact the bottom end of the aerosol generating matrix.

15. The aerosol generating apparatus according to claim 14, characterized in that, The outer conductor includes a first part and a second part connected to the first part. One end of the first part is a closed end, and the other end of the first part is connected to the second part. The inner conductor is disposed within the first part, and one end of the inner conductor is connected to the closed end, while the other end extends toward the second part. The inner conductor and the second part are spaced apart to form the microwave heating gap. The heating channel is formed within the second part.

16. The aerosol generating apparatus according to claim 14, characterized in that: The axial dimension of the microwave heating slit is 0.5 mm to 8 mm.

17. The aerosol generating apparatus according to claim 14, characterized in that: The resistance heating structure includes a heating element, which is a resistance heating trajectory formed on the second part; or, the heating element is one of a heating resistance wire or a flexible heating element disposed on the second part.

18. The aerosol generating apparatus according to claim 1, characterized in that: The heating channel is also provided with a heat insulation structure on its outer periphery, which is used to insulate the heat of the heating channel.

19. The aerosol generating apparatus according to any one of claims 1 or 13 to 18, characterized in that: The aerosol generating device further includes a control unit and a microwave power transmitter. The control unit is signal-connected to the power supply and the microwave power transmitter. The microwave power transmitter is connected to the microwave heating structure and is used to feed electric field energy into the microwave heating structure. The control unit is used to control the output power of the microwave power transmitter.

20. The aerosol generating apparatus according to claim 19, characterized in that: The top end of the inner conductor is provided with a first temperature measuring structure, which is used to detect the temperature of the aerosol generating matrix. The first temperature measuring structure is connected to the control unit, which is used to control the output power of the microwave power transmitter according to the temperature measured by the first temperature measuring structure.

21. The aerosol generating apparatus according to claim 19, characterized in that: The inner wall of the heating channel is also provided with a second temperature measuring structure, which is used to detect the temperature of the aerosol generating matrix. The signal of the second temperature measuring structure is connected to the control unit, which is used to control the output power of the power supply to the resistance heating structure according to the temperature measured by the second temperature measuring structure.

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