Aerosol-generating device and microwave generating assembly therefor

Abstract

The utility model relates to an aerosol generating device and microwave generating assembly thereof. The microwave generating assembly comprises a heat dissipation seat, a radio frequency board, a shielding cover and a heat dissipation cover. An electromagnetic shielding cavity is formed between the heat dissipation seat and the shielding cover. The radio frequency board is arranged in the electromagnetic shielding cavity and at least partially attached to the heat dissipation seat. The heat dissipation cover is partially arranged on the shielding cover and at least partially attached to the heat dissipation seat. Electromagnetic shielding is performed through the electromagnetic shielding cavity formed between the heat dissipation seat and the shielding cover to prevent high-frequency electromagnetic signals of the radio frequency board from leaking. The radio frequency board is cooled by the heat dissipation seat and the heat dissipation cover. The three components cooperate with each other to realize the miniaturization of the structure of the microwave generating assembly.

Description

Technical Field

[0001] This utility model relates to the field of aerosol generation technology, and in particular to an aerosol generation device and its microwave generating component. Background Technology

[0002] For microwave-heated aerosol generating devices, the radio frequency board used to generate high-frequency electromagnetic signals requires an electromagnetic shielding cavity for electromagnetic shielding and heat insulation. However, the thickness of typical electromagnetic shielding cavities is limited by machining precision and cutting limits, hindering device miniaturization. In related technologies, the thinnest part of the electromagnetic shielding cavity is greater than or equal to 0.4–0.7 mm, and this thickness is also limited by the cavity's height; the higher the cavity, the greater the wall thickness. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an improved aerosol generating device and its microwave generating component, which addresses the above-mentioned deficiencies of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a microwave generating component, including a heat sink, an RF board, a shielding cover, and a heat dissipation cap.

[0005] An electromagnetic shielding cavity is formed between the heat sink and the shielding cover. The radio frequency board is disposed in the electromagnetic shielding cavity and at least a portion of it is fitted and installed in contact with the heat sink.

[0006] The heat dissipation cover is partially placed over the shielding cover and is at least partially attached to the heat dissipation base.

[0007] In some embodiments, the shielding cover includes a cover plate and four side plates extending in the same direction from the side edges of the cover plate, the four side plates being fitted and mounted to the heat dissipation cover.

[0008] In some embodiments, the shielding cover is provided with ventilation holes corresponding to the electronic components on the radio frequency board.

[0009] In some embodiments, the thickness of the shielding cover is 0.1 mm to 0.2 mm.

[0010] In some embodiments, the heat sink includes an end wall and at least one side wall extending in the same direction from the side edge of the end wall, the at least one side wall being fitted and mounted to the heat sink base.

[0011] In some embodiments, there are two sidewalls, each located on opposite sides of the end wall.

[0012] In some embodiments, one end of the radio frequency board has a radio frequency connection terminal.

[0013] The two sidewalls are located at the end of the endwall facing the RF connection terminal and the end away from the RF connection terminal, respectively.

[0014] In some embodiments, the microwave generating assembly further includes a main control board, which is attached to the side of the heat sink cover away from the shielding cover and is electrically connected to the radio frequency board.

[0015] In some embodiments, the heat sink, the shielding cover, and the heat dissipation cap are all made of metal.

[0016] This utility model also provides an aerosol generating device, including a microwave generating component as described in any of the above claims and a microwave heating component connected to the microwave generating component.

[0017] The present invention has at least the following beneficial effects: the present invention provides electromagnetic shielding through the electromagnetic shielding cavity formed between the heat sink and the shielding cover to prevent leakage of high-frequency electromagnetic signals from the radio frequency board, and uses the heat sink and heat dissipation cover to dissipate heat from the radio frequency board. The three components work together to achieve miniaturization of the microwave generator assembly. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the aerosol generation system in some embodiments of this utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the longitudinal cross-sectional structure of the aerosol generation system shown.

[0021] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the aerosol generation device;

[0022] Figure 4 yes Figure 3 A schematic diagram of the longitudinal cross-sectional structure of the microwave heating assembly;

[0023] Figure 5 yes Figure 3 A schematic diagram of the longitudinal cross-sectional structure of the microwave heating assembly from another angle;

[0024] Figure 6 yes Figure 4 The diagram shows an exploded view of the microwave heating assembly.

[0025] Figure 7 yes Figure 4 Another exploded structural diagram of the microwave heating assembly shown.

[0026] Figure 8 yes Figure 7 A sectional view of a fixed unit in the middle;

[0027] Figure 9 yes Figure 7 Cross-sectional view of the inner conductor;

[0028] Figure 10 Cross-sectional views of the microwave heating assembly in other embodiments of the present invention are shown;

[0029] Figure 11 yes Figure 10 The diagram shows an exploded view of the microwave heating assembly.

[0030] Figure 12 yes Figure 7 A schematic diagram of the exploded structure of the mid-radial structure;

[0031] Figure 13 yes Figure 12 A schematic diagram of the transverse cross-sectional structure of the radial structure shown.

[0032] Figure 14 This is a cross-sectional schematic diagram of the radial structure in some other embodiments of this utility model;

[0033] Figure 15 A three-dimensional structural schematic diagram of the radial structure is shown in some embodiments of the present invention;

[0034] Figure 16 yes Figure 15 A cross-sectional view of the radial structure shown.

[0035] Figure 17 It shows the use of Figure 12 The electric field distribution obtained from the measured radiation structure is shown in the figure.

[0036] Figure 18 These are schematic diagrams of the radiation structure in some embodiments of the prior art;

[0037] Figure 19 It shows the use of Figure 18 The electric field distribution obtained from the measured radiation structure is shown in the figure.

[0038] Figure 20 yes Figure 7 Exploded view of the RF connector;

[0039] Figure 21 yes Figure 3 A schematic diagram of the structure when the heat insulation bracket is combined with the microwave heating assembly;

[0040] Figure 22 yes Figure 3 Schematic diagram of the exploded structure of the microwave generator assembly;

[0041] Figure 23 yes Figure 22 A cross-sectional view of the microwave generator assembly shown.

[0042] Figure 24 This is a cross-sectional view of the microwave heating assembly containing an aerosol-generated product in some other embodiments of this utility model;

[0043] Figure 25 yes Figure 24 A three-dimensional structural diagram of the fixed unit in the middle;

[0044] Figure 26 yes Figure 25 Top view of the fixed unit shown;

[0045] Figure 27 yes Figure 25 A sectional view of the fixed unit shown;

[0046] Figure 28 yes Figure 27 The shown is a cross-sectional view of a fixed unit containing an aerosol-generated product.

[0047] Figure 29 This is a cross-sectional view of the fixed unit in a modified embodiment of this utility model. Detailed Implementation

[0048] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0049] The terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, four, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] Figures 1 to 2 An aerosol generation system 300 according to some embodiments of the present invention is shown. The aerosol generation system 300 may include an aerosol generation device 100 and an aerosol generation article 200. The aerosol generation article 200 is movably inserted into the aerosol generation device 100, facilitating removal and replacement with a new aerosol generation article 200 after heating is complete for continued use. The aerosol generation device 100 can generate aerosols for user inhalation by feeding microwaves into the aerosol generation article 200 for heating.

[0054] In some embodiments, the aerosol generating article 200 may be cylindrical. Of course, in other embodiments, the aerosol generating article 200 may also be elliptical, polygonal, or other columnar shapes. The aerosol generating article 200 includes an aerosol generating medium 202, which may include solid materials in the form of strips, flakes, or granules made from the leaves and / or stems of plants (e.g., tobacco or tea leaves), and aroma components may be further added to the solid material.

[0055] The aerosol generating product 200 has an inlet end and a distal end opposite to the inlet end, and the user can use it by suction through the inlet end.

[0056] When the aerosol generating product 200 is inserted into the aerosol generating device 100, a portion of the mouth end of the aerosol generating product 200 may protrude outside the aerosol generating device 100 for easy suction by the user.

[0057] In some embodiments, the aerosol generating article 200 may further include a plug 201 disposed at the end of the aerosol generating medium 202 furthest from the inlet. The plug 201 is capable of absorbing backflow condensate to prevent condensate generated by the aerosol generating medium 202 from flowing into the aerosol generating device 100 and causing contamination. Furthermore, the end of the aerosol generating article 200 inserted into the aerosol generating device 100 (i.e., the distal end of the aerosol generating article 200) is sealed by the plug 201, thus preventing medium residue from falling and contaminating the aerosol generating device 100.

[0058] like Figures 2 to 4 As shown, the aerosol generating apparatus 100 may include a housing (not shown), a microwave heating assembly 10, and a microwave generating assembly 30, both of which are disposed within the housing. The microwave generating assembly 30 generates microwave signals and feeds these signals into the microwave heating assembly 10 via a connection to the microwave heating assembly 10. The microwave heating assembly 10 includes a receiving cavity 150, which can be used to contain at least a portion of the aerosol generating article 200. After microwaves are applied, the microwave heating assembly 10 can generate a microwave forming energy field within the receiving cavity 150, thereby heating the aerosol generating article 200 contained within the receiving cavity 150.

[0059] Furthermore, the aerosol generating device 100 may also include a heat-insulating bracket 20, which is at least partially disposed between the microwave heating component 10 and the microwave generating component 30 to achieve heat insulation between the microwave heating component 10 and the microwave generating component 30, so that the heat generated by the microwave heating component 10 during operation is conducted to the microwave generating component 30 as little as possible. The heat-insulating bracket 20 may be made of a low thermal conductivity metal or non-metal material, preferably PEEK, but may also be made of other materials such as PC, ABS, and stainless steel.

[0060] In some embodiments, the aerosol generating apparatus 100 may further include an airflow sensor that is in communication with the accommodating cavity 150 and is capable of detecting pressure or airflow changes during suction. In some embodiments, the airflow sensor may be a differential pressure sensor, such as a MEMS sensor, which consumes little power and is capable of responding to minute changes in airflow and / or pressure.

[0061] The microwave heating assembly 10 may include an outer conductor unit 11, an inner conductor unit 12, a fixing unit 15, and an RF connector 16. The fixing unit 15 may be at least partially disposed in the outer conductor unit 11 for fixing the aerosol-generating article 200. The inner conductor unit 12 is at least partially disposed in the outer conductor unit 11 and can cooperate with the outer conductor unit 11 to allow microwaves to enter the outer conductor unit 11, enabling the generation of a microwave forming energy field within the outer conductor unit 11. The RF connector 16 is connected to the microwave generating assembly 30 for feeding the microwave signal generated by the microwave generating assembly 30 into the accommodating cavity 150.

[0062] The outer conductor unit 11 may be made of metallic materials or other highly conductive materials. For example, the outer conductor unit 11 may be made of gold, silver, copper, aluminum, iron, gold-containing alloys, aluminum-containing alloys, copper-containing alloys, iron-containing alloys, stainless steel, etc.

[0063] like Figures 4 to 7 As shown, in some embodiments, the outer conductor unit 11 can be cylindrical, for example, the outer conductor unit 11 can be a cylindrical straight tube with a cavity 110 formed inside. Of course, in other embodiments, the outer conductor unit 11 can also be other cylindrical shapes such as cuboid cylinder or elliptical cylinder.

[0064] The outer conductor unit 11 has a first end 111 (shown as the upper end) and a second end 112 (shown as the lower end) opposite each other in the axial direction. The first end 111 of the outer conductor unit 11 is an open structure, allowing the aerosol generating article 200 to be inserted into the outer conductor unit 11 from the first end 111. The second end 112 of the outer conductor unit 11 can also be an open structure, allowing the inner conductor unit 12 to be inserted into the outer conductor unit 11 from the second end 112. Of course, in other embodiments, the second end 112 of the outer conductor unit 11 may also be provided with an end wall, allowing the inner conductor unit 12 to be inserted into the outer conductor unit 11 from the first end 111.

[0065] The fixing unit 15 is at least partially disposed within the outer conductor unit 11 and is coaxially disposed with the outer conductor unit 11. The fixing unit 15 is generally cylindrical, and its inner wall defines an accommodating cavity 150. The fixing unit 15 may be made of a material that is resistant to high temperatures, has low thermal conductivity, and low dielectric loss, such as PTFE, PEEK, ceramics, etc.

[0066] like Figures 6 to 8 As shown, the fixing unit 15 may include a cylindrical body 151 and a support wall 152 disposed at one end of the cylindrical body 151. The other end of the cylindrical body 151 is open for insertion of the aerosol generating article 200. The support wall 152 can be used to support the aerosol generating article 200. A through hole 1520 is provided on the support wall 152, which allows the inner conductor unit 12 to at least partially penetrate into the receiving cavity 150. The through hole 1520 may be coaxially arranged with the receiving cavity 150.

[0067] When the aerosol generating article 200 is placed in the fixed unit 15, a gas guiding channel can also be formed between the fixed unit 15 and the aerosol generating article 200 for external gas to enter and carry out the aerosol generated by heating the aerosol generating medium 202.

[0068] In some embodiments, the top surface of the support wall 152 may be provided with at least one support boss 1521. When the aerosol generating article 200 is housed in the fixing unit 15, the aerosol generating article 200 may abut against the support boss 1521, and a first air guiding channel 1522 is defined between the bottom surface of the aerosol generating article 200 and the top surface of the support wall 152.

[0069] In some embodiments, there may be multiple support bosses 1521, which may be arranged around the periphery of the through hole 1520. Specifically, the multiple support bosses 1521 may be arranged at intervals along the circumference of the accommodating cavity 150 at the junction of the support wall 152 and the side wall of the cylinder 151.

[0070] In other embodiments, there may be only one support boss 1521, which may be an annular shape surrounding the through hole 1520.

[0071] In some embodiments, the inner sidewall of the cylinder 151 may be provided with at least one protruding structure 154, which may contact the outer wall surface of the aerosol generating article 200 and may be used to fix the aerosol generating article 200. Furthermore, in some embodiments, the protruding structure 154 may also be used to form at least a partial gas guiding channel.

[0072] Specifically, in this embodiment, each protruding structure 154 includes a plurality of protrusions 1543, which can be evenly spaced or non-uniformly spaced in the circumferential direction of the cylinder 151. The protrusions 1543 are in contact with the outer wall surface of the aerosol generating product 200, and a second air guiding channel 1540 is formed between every two adjacent protrusions 1543. The first air guiding channel 1522 and the second air guiding channel 1540 are connected to form an air guiding channel together.

[0073] In some embodiments, at least one protruding structure 154 includes a first protruding structure 1541 and a second protruding structure 1542, which are spaced apart axially from each other in the cylinder 151. The first protruding structure 1541 is located at the end of the cylinder 151 away from the support wall 152, and the second protruding structure 1542 is located at the end of the cylinder 151 close to the support wall 152. The first protruding structure 1541 and the second protruding structure 1542 respectively hold and fix the aerosol generating article 200 from both ends, which can make the fixation of the aerosol generating article 200 more secure. In addition, the inner wall of the cylinder 151 located between the first protrusion structure 1541 and the second protrusion structure 1542 forms an annular air passage without contacting the aerosol generating product 200. On the one hand, this can increase the air intake area, and on the other hand, it can reduce the contact area between the cylinder 151 and the aerosol generating product 200, thereby reducing the heat transfer from the aerosol generating product 200 to the cylinder 151 and helping to reduce energy consumption.

[0074] Of course, in other embodiments, the inner wall of the cylinder 151 may also be provided with only one protrusion structure 154.

[0075] In some embodiments, an air passage 1510 may be provided on the side wall of the cylinder 151. The air passage 1510 may be connected to the second air guide channel 1540, thereby connecting the second air guide channel 1540 to the airflow sensor. Correspondingly, a through hole 115 connected to the air passage 1510 is provided on the side wall of the outer conductor unit 11.

[0076] The fixing unit 15 can be inserted into the outer conductor unit 11 from the first end 111. The outer diameter of the cylinder 151 can be smaller than the inner diameter of the outer conductor unit 11, which makes it easier to insert the fixing unit 15 and reduces the heat transfer between the fixing unit 15 and the outer conductor unit 11.

[0077] In some embodiments, the first end 111 of the outer conductor unit 11 may be provided with at least one first limiting structure 113, and the fixing unit 15 is correspondingly provided with a second limiting structure 153 that cooperates with at least one first limiting structure 113. The first limiting structure 113 and the second limiting structure 153 are in a convex-concave fit to limit the relative position of the fixing unit 15 and the outer conductor unit 11 and prevent the fixing unit 15 from rotating when subjected to force.

[0078] In this embodiment, the first limiting structure 113 has two limiting grooves, each extending axially downward from the end face of the first end 111 of the outer conductor unit 11. The two limiting grooves are symmetrically distributed on both radial sides of the outer conductor unit 11. Correspondingly, the second limiting structure 153 has two limiting protrusions, each extending outward from the upper outer wall of the fixing unit 15. The two limiting protrusions are symmetrically distributed on both radial sides of the fixing unit 15. When the fixing unit 15 is installed into the outer conductor unit 11, the limiting protrusions are engaged in the limiting grooves, thereby ensuring that the fixing unit 15 is properly assembled and that the fixing unit 15 and the outer conductor unit 11 do not rotate relative to each other.

[0079] Understandably, in other embodiments, the first limiting structure 113 may also be a limiting protrusion, and correspondingly, the second limiting structure 153 may be a limiting groove. Furthermore, the number of each of the first limiting structure 113 and the second limiting structure 153 may be one or more. When there are multiple first limiting structures 113 / second limiting structures 153, they are evenly or non-uniformly distributed in the circumferential direction of the outer conductor unit 11 / fixed unit 15.

[0080] like Figures 4 to 7 as well as Figures 9 to 11 As shown, the inner conductor unit 12 may include a radiating structure 13 and an inner conductor 14. The inner conductor 14 is at least partially disposed within the outer conductor unit 11 and can form good ohmic contact with the outer conductor unit 11. The radiating structure 13 can be fixed to the inner conductor 14 and can be coaxially disposed with the inner conductor 14. A portion of the radiating structure 13 can pass through the through-hole 1520 into the receiving cavity 150. When the aerosol generating article 200 is installed into the fixing unit 15, the radiating structure 13 can be partially inserted into the aerosol generating article 200, radiating the electromagnetic energy fed into the cavity 110 to the aerosol generating medium 202 to form a heating effect.

[0081] The inner conductor 14 is provided with a mounting hole 140 for mounting the radiating structure 13. The mounting hole 140 can penetrate the inner conductor 14 axially and can be coaxially arranged with the inner conductor 14. The lower part of the radiating structure 13 can be fixed in the mounting hole 140 by means of riveting or the like, and the upper part of the radiating structure 13 passes through the through hole 1520 into the receiving cavity 150.

[0082] The inner conductor 14 can be made of metallic materials or other highly conductive materials. For example, the inner conductor 14 is made of gold, silver, copper, aluminum, iron, gold alloys, aluminum alloys, copper alloys, iron alloys, stainless steel, etc.

[0083] In some embodiments, a portion of the outer wall surface of the inner conductor 14 can be directly or indirectly interference-fitted with a portion of the inner wall surface of the outer conductor unit 11. This interference fit connection achieves the installation and fixation between the inner conductor 14 and the outer conductor unit 11, while also ensuring a reliable ohmic contact. Furthermore, the interference fit connection between the inner conductor 14 and the outer conductor unit 11 eliminates assembly gaps, saves space occupied by threaded connections, simplifies the component structure, and facilitates assembly, thus contributing to the miniaturization of the microwave heating assembly 10.

[0084] Direct interference fit refers to a partial interference fit between the outer wall of the inner conductor 14 and a partial interference fit between the inner wall of the outer conductor unit 11, while indirect interference fit refers to a partial interference fit between the outer wall of the inner conductor 14 and a partial interference fit between the inner wall of the outer conductor unit 11 and one or more structural components (such as conductive ring 17).

[0085] The inner conductor 14 and the outer conductor unit 11 can be assembled using a riveting fixture. The two parts are placed in corresponding fixtures and joined together by riveting force, which facilitates automation, has high assembly efficiency, and the riveted inner conductor 14 and outer conductor unit 11 have good vibration resistance, are not easy to fall off, and have a longer cavity life.

[0086] In some embodiments, the inner conductor 14 may be generally goblet-shaped and may include a first columnar portion 141, a second columnar portion 142, a third columnar portion 143, a fourth columnar portion 144, and a fifth columnar portion 145 arranged sequentially from bottom to top along the axial direction. The outer wall surface of the second columnar portion 142 is interference-fitted with the inner wall surface of the outer conductor unit 11; that is, the outer diameter of the second columnar portion 142 is slightly larger than the inner diameter of the outer conductor unit 11. The first columnar portion 141 is located outside the outer conductor unit 11, while the second columnar portion 142, the third columnar portion 143, the fourth columnar portion 144, and the fifth columnar portion 145 are all located within the outer conductor unit 11.

[0087] In some embodiments, such as Figure 5 As shown, a portion of the outer wall surface of the inner conductor 14 is directly press-fitted with a portion of the inner wall surface of the outer conductor unit 11. The interference between the second columnar portion 142 and the outer conductor unit 11 is between 0.01 mm and 0.05 mm, preferably between 0.02 mm and 0.04 mm, and more preferably around 0.02 mm. If the interference is too small, there will be an assembly gap between the second columnar portion 142 and the outer conductor unit 11, and the inner conductor 14 will easily fall off. If the interference is too large, the outer conductor unit 11 will be deformed by riveting, affecting the performance of the cavity 110.

[0088] In some embodiments, such as Figure 10 , Figure 11As shown, a portion of the outer wall surface of the inner conductor 14 and a portion of the inner wall surface of the outer conductor unit 11 are interference-fitted by a conductive ring 17. The conductive ring 17 can be made of conductive materials such as metal, and an ohmic contact is formed between the inner conductor 14 and the outer conductor unit 11 through the conductive ring 17.

[0089] The conductive ring 17 can be annular and is fitted between the second columnar portion 142 and the outer conductor unit 11. The conductive ring 17 is interference-fitted with both the second columnar portion 142 and the outer conductor unit 11; that is, the inner diameter of the conductive ring 17 is slightly smaller than the outer diameter of the second columnar portion 142, and the outer diameter of the conductive ring 17 is slightly larger than the inner diameter of the outer conductor unit 11. The interference amount between the conductive ring 17 and the second columnar portion 142 and the outer conductor unit 11 can be between 0.01 mm and 0.05 mm, preferably between 0.02 mm and 0.04 mm, and more preferably around 0.02 mm.

[0090] The outer diameter of the first columnar portion 141 is greater than the outer diameter of the second columnar portion 142, and the outer diameter of the first columnar portion 141 can be equal to or approximately equal to the outer diameter of the outer conductor unit 11. The upper end face of the first columnar portion 141 can abut against the lower end face of the outer conductor unit 11.

[0091] In some embodiments, the first columnar portion 141 may be provided with a first orientation structure 1410, and the outer conductor unit 11 may be provided with a corresponding second orientation structure 114. The first orientation structure 1410 and the second orientation structure 114 are mutually convex and concave, which are used for orientation during the assembly of the inner conductor 14 and the outer conductor unit 11, and prevent the inner conductor 14 and the outer conductor unit 11 from rotating relative to each other.

[0092] In this embodiment, the first directional structure 1410 is a directional groove disposed on the outside of the first columnar portion 141. It can extend downwards from the upper end face of the first directional structure 1410 to penetrate the lower end face of the first directional structure 1410; alternatively, it may not penetrate the lower end face of the first directional structure 1410. Correspondingly, the second directional structure 114 is a directional protrusion, which can be formed by extending downwards from the lower end face of the outer conductor unit 11. It is understood that in other embodiments, the first directional structure 1410 may be a directional protrusion, and the second directional structure 114 may be a directional groove.

[0093] The number of the first orientation structure 1410 and the second orientation structure 114 is not limited, and there can be one or more of them. When there are multiple first orientation structures 1410 / second orientation structures 114, they can be evenly or non-uniformly spaced in the circumferential direction of the inner conductor 14 / outer conductor unit 11.

[0094] The fifth columnar portion 145 may be a hollow cylindrical shape, with a receiving chamber 1450 formed on its inner side for accommodating a portion of the fixing unit 15. The upper end of the receiving chamber 1450 is open, and the fixing unit 15 can be inserted into the receiving chamber 1450 through the upper opening. In some embodiments, the inner wall surface of the fifth columnar portion 145 and the outer wall surface of the cylindrical body 151 may be in a clearance fit, which is beneficial for assembly and heat insulation.

[0095] The lower end face of the support wall 152 of the fixing unit 15 may be provided with a protrusion 155. In this embodiment, the protrusion 155 is annular and formed on the outer periphery of the support wall 152. The outer diameter of the protrusion 155 is equal to the outer diameter of the cylinder 151. The fixing unit 15 abuts against the bottom wall of the receiving chamber 1450 through the protrusion 155, which helps to reduce the contact between the fixing unit 15 and the inner conductor 14 and reduce heat transfer. Of course, in other embodiments, the outer diameter of the protrusion 155 may be smaller than the outer diameter of the cylinder 151; in other embodiments, there may be multiple protrusions 155, which may be distributed at intervals in the circumferential direction of the support wall 152.

[0096] The third columnar portion 143, the fourth columnar portion 144, and the fifth columnar portion 145 form an impedance matching section. Through specific dimensional design, impedance continuity is achieved, and the electromagnetic energy fed into the cavity 110 is efficiently transmitted to the radiation structure 13. In some embodiments, the outer diameters of the third columnar portion 143, the fourth columnar portion 144, and the fifth columnar portion 145 increase sequentially, and the outer diameters of the third columnar portion 143, the fourth columnar portion 144, and the fifth columnar portion 145 are all smaller than the outer diameter of the second columnar portion 142. That is, the third columnar portion 143, the fourth columnar portion 144, and the fifth columnar portion 145 are all clearance-fitted with the inner wall surface of the outer conductor unit 11.

[0097] During assembly, the inner conductor 14 is inserted into the outer conductor unit 11 from bottom to top. The fifth columnar portion 145, the fourth columnar portion 144, and the third columnar portion 143 are sequentially inserted into the outer conductor unit 11. Since the fifth columnar portion 145, the fourth columnar portion 144, and the third columnar portion 143 are all clearance-fitted with the inner wall surface of the outer conductor unit 11, the insertion is easy. The second columnar portion 142 is the last to be inserted into the outer conductor unit 11 and is fixed with an interference fit.

[0098] In some embodiments, the first columnar portion 141 and the second columnar portion 142 may be provided with through holes 146 for the RF connector 16 to pass through. The through holes 146 may extend upward from the lower end face of the first columnar portion 141 to penetrate the upper end face of the second columnar portion 142. The third columnar portion 143 is provided with a socket 147 for the RF connector 16 to be inserted. The socket 147 may be a blind hole, which may extend upward from the lower end face of the third columnar portion 143.

[0099] The outer conductor unit 11 adopts a straight-through tube structure, meaning that the inner and outer diameters of the outer conductor unit 11 remain unchanged in the axial direction. The outer conductor unit 11 can be machined by cold drawing followed by CNC machining, which is suitable for mass production. The inner conductor 14 adopts a goblet-shaped structure, and key parts are machined by turning, resulting in higher precision. Combined with drilling, the structure is simple and the cost is low.

[0100] like Figure 5 and Figure 12 As shown, the radiating structure 13 may be a composite structure, which may include a support member 131 and at least one heating needle 132. The support member 131 is an insulating component used to support and fix the heating needle 132, and to puncture the plug 201 of the aerosol generating medium 200. The heating needle 132 is a conductive component, serving as a microwave antenna to radiate electromagnetic waves to the surroundings, thereby rapidly heating the aerosol generating medium 202. At least one heating needle 132 may be disposed on the outside of the support member 131 and / or disposed within the support member 131.

[0101] The support member 131 can be made of high-temperature resistant and wave-transparent materials such as glass, ceramics, and plastics. For example, the support member 131 can be made of quartz glass, alumina ceramics, zirconia ceramics, PEEK, etc.

[0102] The support member 131 may include a support body 1312, which may be cylindrical (e.g., cylindrical) and has a recessed mounting groove 1310 on its outer surface for mounting the heating needle 13. Understandably, in other embodiments, the support body 1312 may also be sheet-like or other shapes.

[0103] In some embodiments, the support member 131 may further include a head 1313 disposed at one end of the support body 1312 and a support base 1311 disposed at the other end of the support body 1312. The head 1313 has a gradient shape; specifically, the head 1313 may be conical (e.g., conical), and the taper of the head 1313 may be less than 45°, so that the support member 131 can be smoothly inserted into the aerosol generating article 200 through the head 1313.

[0104] The outer diameter of the support base 1311 is larger than the outer diameter of the support body 1312, and the support member 131 can be fixed in the mounting hole 140 of the inner conductor 14 through the support base 1311. The support base 1311 has a mounting through hole 1314 corresponding to the assembly groove 1310. The heating needle 132 can be inserted into the assembly groove 1310 through the mounting through hole 1314 and can be bonded and fixed by means of adhesive, etc., to strengthen the fixation of the heating needle 132 in the assembly groove 1310. It is understood that in other embodiments, the support member 131 may not have a support base 1311.

[0105] The support member 131 can be a one-piece molded structural component. Of course, in other embodiments, the support body 1312 and the support base 1311 and / or the head 1313 can also be molded separately and then assembled together.

[0106] The heating needle 132 can be made of metal or other highly conductive materials. For example, the heating needle 132 can be made of gold, silver, copper, aluminum, iron, gold-containing alloys, aluminum-containing alloys, copper-containing alloys, iron-containing alloys, stainless steel, etc. The heating needle 132 can be disposed on the outside of the support member 131, and a portion of the outer surface of the heating needle 132 can contact the wall surface of the mounting hole 140 of the inner conductor 14 to form an ohmic contact.

[0107] Preferably, there may be two or more heating needles 132. At least two heating needles 132 are distributed at intervals on the outer periphery of the support 131. Preferably, at least two heating needles 132 are symmetrically distributed with respect to the center line of the support 131, which is beneficial to achieving uniform heating of the aerosol generating medium 202.

[0108] The heating needle 132 can be tubular (e.g., cylindrical) with a cavity 1320 formed inside. The outer diameter of the heating needle 132 can be 1 mm to 1.5 mm, and the wall thickness can be 0.1 mm to 0.15 mm. The end of the heating needle 132 inserted into the aerosol generating article 200 (i.e., the upper end of the heating needle 132) is sealed to prevent media residues from entering the heating needle 132. In addition, the upper tip of the heating needle 132 can have a gradually changing shape, such as hemispherical or conical, to facilitate smooth insertion into the aerosol generating article 200.

[0109] The upper tip of the heating needle 132 is lower than the head 1313 of the support 131. The upper end of the heating needle 132 can be approximately flush with the upper end of the support body 1312. Of course, in other embodiments, the upper end of the heating needle 132 can also be lower than the upper end of the support body 1312.

[0110] The electric field is strongest at the tip of the heating needle 132, resulting in a faster heating rate for the aerosol-generating medium located near the tip. Compared to existing radiative structures, the tip region of the heating needle 132 in this invention, where the electric field is strongest, is closer to the aerosol-generating medium, thereby increasing the heating rate of the aerosol-generating medium and shortening the preheating time.

[0111] In some embodiments, the radiating structure 13 may further include a temperature sensing element 133 housed in the cavity 1320. The lower end of the heating needle 132 is open, and the leads of the temperature sensing element 133 can pass through the opening at the lower end of the heating needle 132. The temperature sensing element 133 is used to measure the temperature of the aerosol generating medium 202, and it may be a thermocouple or a thermistor.

[0112] The heating needle 132 is inserted into the assembly groove 1310, and the assembly groove 1310 and the heating needle 132 form a semi-enclosed relationship. That is, part of the outer peripheral surface of the heating needle 132 is placed in the assembly groove 1310, and the other part of the outer peripheral surface is exposed outside the assembly groove 1310.

[0113] like Figures 13 to 14 As shown, the wrapping angle α of the mounting groove 1310 around the heating needle 132 can be from 1° to 359°. The wrapping angle α is defined as the angle formed by the lines connecting the two intersection points of the first circle and the second circle to the center point of the first circle, on the cross-section of the radial structure 13, where the outer contour of the heating needle 132 defines a first circle and the outer contour of the support member 131 defines a second circle. Figure 13 As shown, when the center point of the first circle is located inside the second circle, the encirclement angle α is greater than 180°; Figure 14 As shown, when the center point of the first circle is outside the second circle, the encirclement angle α is less than 180°.

[0114] The larger the wrapping angle α, the smaller the surface area of ​​the heating needle 132 exposed in the receiving cavity 150, the less likely the heating needle 132 is to accumulate dirt, resulting in better cleanliness. Simultaneously, the heating needle 132 is less likely to clog the head 201. However, a larger wrapping angle α also increases the difficulty of molding the support member 131 to avoid the heating needle 132. Therefore, considering that the heating needle 132 is less likely to clog the head 201, the wrapping angle α needs to be greater than 180°. Without considering molding difficulty, the wrapping angle α is preferably 270°–359° to ensure better cleanliness.

[0115] like Figures 15 to 16 As shown, in this embodiment, the heating needle 132 is disposed in the support member 131. The support member 131 is made of a wave-transparent material, and two mounting holes 1315 may be provided in the support member 131 for mounting two heating needles 132 therein. It can be understood that in other embodiments, the number of heating needles 132 may be one or more.

[0116] Preferably, the two mounting holes 1315 are symmetrically distributed with respect to the centerline of the support 131, which facilitates uniform heating of the aerosol generating medium. A portion (upper part) of the heating needle 132 is disposed within the mounting hole 1315, so that when the radiating structure 13 is inserted into the aerosol generating medium, the heating needle 132 will not come into contact with the aerosol generating medium, preventing scale buildup on the heating needle 132 and ensuring good cleanability. The other portion (lower part) of the heating needle 132 extends beyond the mounting hole 1315, facilitating ohmic contact with the inner conductor 14.

[0117] The support member 131 may include a support body 1312, a head 1313 disposed at one end of the support body 1312, and a support base 1311 disposed at the other end of the support body 1312. The mounting hole 1315 may extend axially upward from the bottom end face of the support member 131 (that is, the end face of the support base 1311 away from the head 1313), and the upper end of the mounting hole 1315 may be located approximately at the junction of the support body 1312 and the head 1313.

[0118] The heating needle 132 can be inserted into the mounting hole 1315 through the bottom opening of the mounting hole 1315, and can be glued and fixed by means of adhesive application to strengthen the fixation of the heating needle 132 in the mounting hole 1315.

[0119] In this embodiment, the support member 131 has two mounting holes 1315 spaced apart, for mounting two heating needles 132 respectively. In other embodiments, the support member 131 may have only one mounting hole 1315, which may be located at the central axis of the support member 131. The two heating needles 132 are mounted in the mounting hole 131 and can be fixed to the side wall of the mounting hole 131 by means of adhesive bonding or other methods.

[0120] Figure 17 It shows the use of Figure 12 The electric field distribution diagram obtained by testing the radiation structure 13 shown is shown. The radiation structure 13 includes a glass support 131 and two metal heating needles 132 disposed on the outer surface of the glass support 131. Figure 19 A radiating structure 13a employing prior art is shown (e.g., Figure 18 The electric field distribution diagram obtained by testing is shown in the figure. Radiation structure 13a is a single-metal heating needle structure. Radiation structures 13 and 13a are approximately the same size. Comparing the electric fields generated by radiation structures 13 and 13a of the same size, it can be found that the peak electric field generated by radiation structure 13 on the aerosol generating medium 202 is higher (1.83e5V / m) than that of radiation structure 13a (1.18e5V / m). This means that the aerosol generating medium 202 heats up faster, which is beneficial for shortening the preheating time. At the same time, because the heating needle 132 of radiation structure 13 is smaller, the temperature measuring point is closer to the high-temperature region of the aerosol generating medium 202. Therefore, radiation structure 13 has a faster temperature measurement response than radiation structure 13a.

[0121] For example Figure 4 , Figure 9 as well as Figure 20 As shown, the RF connector 16 may include an outer conductor 161, an inner conductor 163 disposed in the outer conductor 161, and an insulator 162 disposed between the outer conductor 161 and the inner conductor 163.

[0122] The connector's outer conductor 161 is made of metal or other conductive materials, preferably Kovar alloy, brass, or beryllium bronze, but stainless steel can also be used. The connector's outer conductor 161 serves as electromagnetic shielding, forming a closed electromagnetic shielding cavity to prevent leakage of high-frequency electromagnetic signals.

[0123] The connector outer conductor 161 is cylindrical (e.g., cylindrical), with an inner cavity 1610 formed therein. Both ends of the connector outer conductor 161 are open structures. During assembly, the connector outer conductor 161 is at least partially disposed within the through-hole 146 of the inner conductor 14, and the outer peripheral side of the connector outer conductor 161 is in ohmic contact with the inner wall surface of the through-hole 146. The methods for fixing the connector outer conductor 161 in the through-hole 146 include, but are not limited to, riveting, threaded connection, and flange.

[0124] In some embodiments, the connector outer conductor 161 may include a first cylindrical portion 1611 and a second cylindrical portion 1612. The first cylindrical portion 1611 is disposed in the through hole 146, and the outer peripheral side of the first cylindrical portion 1611 is in ohmic contact with the inner wall surface of the through hole 146. It can be installed into the through hole 146 by riveting.

[0125] The second cylindrical portion 1612 is located outside the through hole 146. The second cylindrical portion 1612 is coaxially arranged with the first cylindrical portion 1611 and can be formed by extending downward from the lower end of the first cylindrical portion 1611. The outer diameter of the second cylindrical portion 1612 is larger than the outer diameter of the first cylindrical portion 1611, and the upper end face of the second cylindrical portion 1612 can abut against the lower end face of the through hole 146, which plays a limiting role during assembly.

[0126] The insulator 162 can be made of non-metallic materials such as polytetrafluoroethylene or glass sintering, and is used to fix the inner conductor 163 of the connector and keep the inner conductor 163 of the connector in an insulating state with respect to the outer conductor 161 of the connector.

[0127] The connector inner conductor 163 can be made of metal or other conductive materials, preferably Kovar alloy or brass. The connector inner conductor 163 is tightly connected to the inner conductor 14 and is used to transmit high-power, high-frequency electromagnetic signals. The connector inner conductor 163 can be generally in the form of a straight column, but in other embodiments, the connector inner conductor 163 can also be in other shapes such as an L-shape.

[0128] The connector inner conductor 163 includes a connecting portion 1631 and a feed portion 1633. The connecting portion 1631 is located inside the connector outer conductor 161 and is used to connect to the microwave generating assembly 30 and receive microwaves. The feed portion 1633 is located outside the connector outer conductor 161. During assembly, the feed portion 1633 can be inserted into the socket 147 and make ohmic contact with the inner wall surface of the socket 147.

[0129] Furthermore, the inner conductor 163 of the connector may also include a transition portion 1632 connecting the feed portion 1633 and the connecting portion 1631. The outer diameters of the transition portion 1632 and the connecting portion 1631 may be equal or unequal. The outer diameter of the transition portion 1632 may be larger than the outer diameter of the feed portion 1633. During assembly, the upper end face of the transition portion 1632 can abut against the lower end face of the socket 147, serving a limiting function.

[0130] The feed portion 1633 can form at least one elastic arm 1636 through openings and slots, which is tightly connected to the inner wall surface of the socket 147. Preferably, the feed portion 1633 includes at least two elastic arms 1636 arranged in a ring shape, the shape of which is adapted to the cross-sectional shape of the socket 147. For example, the cross-section of the socket 147 is circular, and the at least two elastic arms 1636 are arranged in a ring shape. The at least two elastic arms 1636 can be symmetrically distributed with respect to the centerline of the socket 147, so that when the at least two elastic arms 1636 are inserted into the socket 147, the force can be more evenly distributed, resulting in better electrical connection stability. In other embodiments, there may be only one elastic arm 1636, which can be an open annular structure.

[0131] Specifically, the feed portion 1633 has an inner hole 1634 and at least one slot 1635 disposed around the periphery of the inner hole 1634, both the upper ends of the inner hole 1634 and the at least one slot 1635 being open. The inner hole 1634 can extend downward from the upper end face of the feed portion 1633 and can be coaxially disposed with the feed portion 1633. At least one elastic arm 1636 is disposed around the periphery of the inner hole 1634. The slot 1635 can be a straight groove, which can extend downward from the upper end of the side wall of the feed portion 1633. The slot 1635 connects the inner hole 1634 to the outer side of the feed portion 1633. The inner hole 1634 and the at least one slot 1635 can provide space for the elastic arm 1636 to be pressed inward and tension to be applied outward.

[0132] The depth of the inner hole 1634 can be greater than the depth of the slot 1635. Of course, in other embodiments, the depth of the inner hole 1634 can also be equal to the depth of the slot 1635.

[0133] The number of slots 1635 is equal to the number of elastic arms 1636. Preferably, there are at least two slots 1635, and the at least two slots 1635 divide the feed portion 1633 to form at least two elastic arms 1636.

[0134] To ensure a tight connection between the elastic arms 1636 and the inner wall of the socket 147, in the unloaded state, the outer diameter of the ring formed by at least two elastic arms 1636 is slightly larger than the diameter of the socket 147. When at least two elastic arms 1636 are inserted into the socket 147, they are compressed inward by the inner wall of the socket 147; however, because the elastic arms 1636 are made of metal and have ductility, they tend to deform outward. This principle ensures that the outer wall of the elastic arms 1636 remains in close contact with the inner wall of the inner conductor 14, thereby guaranteeing the stability of the electrical connection. Furthermore, the RF connector 16 can be repeatedly plugged into and removed from the inner conductor 14. The plugging and removing operation is easy, and the stability of the electrical connection between the RF connector 16 and the inner conductor 14 is maintained even after multiple plugging and removal operations.

[0135] The upper end face of the elastic arm 1636 may not abut against the inner end face of the socket 147, but rather form a certain gap, which can reduce the depth accuracy requirements of the socket 147. Of course, in other embodiments, the upper end face of the elastic arm 1636 may also abut against the inner end face of the socket 147.

[0136] like Figure 2 , Figure 3 as well as Figure 21 As shown, the heat insulation bracket 20 may include a first bracket portion 21 and a second bracket portion 22. The first bracket portion 21 is located between the microwave heating component 10 and the microwave generating component 30, thereby achieving heat insulation between the microwave heating component 10 and the microwave generating component 30. The second bracket portion 22 is connected to the first bracket portion 21, forming a roughly L-shaped structure.

[0137] A clearance hole 210 may be provided on the first support portion 21. The clearance hole 210 exposes at least the radio frequency connector 16, allowing the radio frequency connector 16 to pass through the clearance hole 210 and connect to the microwave generating component 30. In this embodiment, the clearance hole 210 may extend from a position corresponding to the outer conductor 161 of the connector towards the center line of the microwave heating component 10, and further extend to the other side of the center line. In this way, the area of ​​the clearance hole 210 can be increased, reducing the contact between the first support portion 21 and the microwave heating component 10 and the microwave generating component 30, thereby achieving a better heat insulation effect.

[0138] At least one of the first support portion 21 and the second support portion 22 is fixed to the first support portion 21. In some embodiments, the first support portion 21 may be provided with at least one first fixing hole 211 and at least one second fixing hole 212. The first support portion 21 is fixed to the microwave generating assembly 30 through the first fixing hole 211 and fixed to the microwave heating assembly 10 through the second fixing hole 212. Of course, in other embodiments, the first support portion 21 may only be provided with the first fixing hole 211 for fixed connection with the microwave generating assembly 30, or the first support portion 21 may only be provided with the second fixing hole 212 for fixed connection with the microwave heating assembly 10.

[0139] Preferably, there are two first fixing holes 211, located on either side of the clearance hole 210. The microwave generating assembly 30 has two third fixing holes 311 corresponding to the two first fixing holes 211. The first support portion 21 can be fixedly connected to the microwave generating assembly 30 using two screws respectively inserted into the two first fixing holes 211 and the two third fixing holes 311. If there is only one first fixing hole 211, the first support portion 21 is fixedly connected to the microwave generating assembly 30 using only one screw, resulting in poor connection stability. Increasing the number of first fixing holes 211 increases the number of screws required, and since screws are made of metal, this reduces the heat insulation effect between the microwave heating assembly 10 and the microwave generating assembly 30.

[0140] Preferably, there are two second fixing holes 212, located on both sides of the clearance hole 210. The inner conductor 14 is provided with two fourth fixing holes 1412 corresponding to the two second fixing holes 212. The first support portion 21 can be fixedly connected to the microwave heating component 10 by two screws respectively passing through the two second fixing holes 212 and the two fourth fixing holes 1412. If there is only one second fixing hole 212, the first support portion 21 is fixedly connected to the microwave heating component 10 by only one screw, resulting in poor connection stability. Increasing the number of second fixing holes 212 increases the number of screws required, which reduces the heat insulation effect between the microwave heating component 10 and the microwave generating component 30.

[0141] The second support portion 22 is a cantilever structure, with one end (fixed end) connected to the first support portion 21, and the other end (free end) extending towards the through hole 115 of the outer conductor unit 11. A sensing hole 221 is provided at the free end of the second support portion 22 corresponding to the through hole 115. The second support portion 22 is perpendicularly connected to the first support portion 21, and the extending direction of the second support portion 22 can be parallel or approximately parallel to the axial direction of the outer conductor unit 11. Of course, in other embodiments, the second support portion 22 may not be perpendicularly connected to the first support portion 21.

[0142] A gap 220 may be formed between the second support portion 22 and the outer conductor unit 11 to reduce the contact area between the second support portion 22 and the outer conductor unit 11 and improve the heat insulation effect. The inner side of the second support portion 22 does not contact the outer side of the outer conductor unit 11, and the space between the second support portion 22 and the outer conductor unit 11 may also be filled with heat insulation material (such as aerogel) to achieve a better heat insulation effect.

[0143] The second support portion 22 protrudes towards the inner side of the outer conductor unit 11, forming an annular protrusion 222. The inner wall of the annular protrusion 222 defines the sensing hole 221. The end face of the annular protrusion 222 facing the outer conductor unit 11 fits against the outer wall of the outer conductor unit 11 surrounding the through hole 115, ensuring the airtightness of the connection between the sensing hole 221 and the through hole 115.

[0144] An airflow sensor can be mounted on the second bracket 22, with the airflow sensor facing the sensing hole 221 and the through hole 115, so that changes in pressure or airflow during suction can be monitored.

[0145] The second support portion 22 can be generally hollow in the shape of a square ring, and it may include two spaced-apart first support arms 223 and a second support arm 224 connecting the two first support arms 223. The two first support arms 223 are arranged in parallel and spaced apart, one end of each first support arm 223 is connected to the first support portion 21, and the other end of each first support arm 223 is connected to both ends of the second support arm 224 respectively. The annular protrusion 222 may be formed by protruding from the inner side of the second support arm 224.

[0146] like Figure 3 , Figure 22 as well as Figure 23 The microwave generating assembly 30 includes an RF board 32, which is used for an electromagnetic signal generation circuit to provide high-frequency electromagnetic heating energy to the microwave heating assembly 10. The RF board 32 is connected to the microwave heating assembly 10 via an RF connection terminal 321.

[0147] Since the operating efficiency of the RF board 32 is typically no higher than 80%, it generates a significant amount of heat during operation due to the efficiency of the RF circuit. Therefore, the microwave generating assembly 30 may further include a heat sink 31 and a heat sink cover 34, with the heat sink cover 34 covering the heat sink 31 to form a heat sink. The RF board 32 is mounted between the heat sink 31 and the heat sink cover 34, and at least a portion of the RF board 32 is tightly attached to the heat sink 31 and / or the heat sink cover 34. The heat generated by the RF board 32 during operation can be quickly conducted away through the heat sink 31 and the heat sink cover 34.

[0148] In some embodiments, the microwave generating assembly 30 may include a shielding cover 33 for shielding the radio frequency board 32 and preventing leakage of high-frequency electromagnetic signals. The shielding cover 33 is disposed between the heat sink 31 and the heat sink cover 34. An electromagnetic shielding cavity 330 is formed between the shielding cover 33 and the heat sink 31. The radio frequency board 32 is disposed in the electromagnetic shielding cavity 330 and attached to the heat sink 31, which can both prevent leakage of high-frequency electromagnetic signals and dissipate heat from the radio frequency board 32.

[0149] The heat sink 31 is used to support the radio frequency board 32 and quickly conduct away the heat generated by the electronic components on the radio frequency board 32, preventing the radio frequency board 32 from failing due to high temperature caused by poor heat dissipation. The heat sink 31 can be made of high thermal conductivity materials such as metal or non-metal (e.g., plastic), preferably aluminum alloy, but can also be made of metal materials such as stainless steel, iron alloy, and titanium alloy.

[0150] The shielding cover 33 can be made of a highly conductive material or a non-metallic material with a metallic coating, preferably an aluminum alloy, but can also be made of stainless steel, iron alloy, titanium alloy, or other metallic materials. The thickness of the shielding cover 33 can be 0.1 mm to 0.2 mm, and it can be made by stamping or machining from a metal sheet.

[0151] The shielding cover 33 may include a cover plate 331 and four side plates 332 extending in the same direction from the side of the cover plate 331. The shielding cover 33 is fitted onto the heat sink 31 via the four side plates 332. The cover plate 331 and the heat sink 31 are spaced apart, and the cover plate 331, the four side plates 332, and the heat sink 31 define a closed electromagnetic shielding cavity 330, which serves as electromagnetic shielding. One of the upper side plates 332 mates with the heat sink 31 to form a through hole 3320 through which an RF connection terminal 321 passes.

[0152] The cover plate 331 may be provided with a hole 3310 to prevent the electronic components on the radio frequency board 32 from short-circuiting or being interfered with by metal.

[0153] The heat sink 34 can be made of a high thermal conductivity material, such as metal or non-metal (e.g., plastic), preferably aluminum alloy, but can also be stainless steel, iron alloy, titanium alloy, or other metal materials. The heat sink 34 partially covers the shielding cover 33, and the heat sink 34 and the heat sink base 31 are at least partially attached together, providing heat dissipation for the RF board 32. In addition, the heat sink 34 can also support the main control board and be used for heat dissipation of the main control board. The main control board is electrically connected to the RF board 32 and is used to control the operation of the RF board 32.

[0154] In some embodiments, the heat sink 34 may include an end wall 341 and two side walls 342 extending in the same direction from the side of the end wall 341. The end wall 341 covers the cover plate 331. The main control board may be mounted on the side of the end wall 341 away from the cover plate 331 and may fit tightly against the end wall 341, allowing the main control board to dissipate heat quickly through the end wall 341.

[0155] Two sidewalls 342 are located on both sides of the end wall 341 along its length, and the two sidewalls 342 are in close contact with the heat sink 31 to achieve heat conduction and dissipation. The length direction is parallel to the axial direction of the microwave heating assembly 10. Of course, in other embodiments, there may be only one sidewall 342, as long as there is enough contact surface between the heat sink cover 34 and the heat sink 31 for heat transfer.

[0156] In some embodiments, a heat-insulating material such as aerogel may be filled between the microwave generating component 30 and the housing of the aerosol generating device 100 to further reduce heat transfer to the housing.

[0157] In this embodiment, the end wall 341 is not provided with side walls 342 on both sides along the width direction. The wall thickness of the two side plates 332 of the shielding cover 33 along the width direction is the wall thickness of the entire microwave generating assembly 30 on both sides in the width direction. In this way, the width of the entire microwave generating assembly 30 can be reduced. Under the limitation of the same internal size of the shell, a larger aerogel space can be provided for the heat sink, resulting in a better shell cooling effect.

[0158] The shielding cover 33 can be connected to the heat sink 31 and / or heat sink cover 34 by screws, or by other fixing methods such as laser sealing or soldering.

[0159] Figures 24 to 28 The microwave heating assembly 10 shown in some embodiments of the present invention is similar to the aforementioned embodiments. This microwave heating assembly 10 also includes an outer conductor unit 11, a radiating structure 13, an inner conductor 14, and a fixing unit 15. The inner conductor 14 is at least partially disposed within the outer conductor unit 11 and forms an ohmic contact with the outer conductor unit 11. The radiating structure 13 is partially fixed within the inner conductor 14 and partially extends beyond the inner conductor 14. When the aerosol generating article 200 is inserted into the fixing unit 15, the portion of the radiating structure 13 extending beyond the inner conductor 14 can be inserted into the aerosol generating article 200, radiating the electromagnetic energy fed into the outer conductor unit 11 to the aerosol generating medium 202 of the aerosol generating article 200 to create a heating effect.

[0160] The outer conductor unit 11 is cylindrical and has a first end 111 and a second end 112 that are axially opposite each other. The first end 111 of the outer conductor unit 11 is an open structure, and the aerosol generating article 200 can be inserted into the outer conductor unit 11 from the first end 111.

[0161] The inner conductor 14 has a recessed end face facing the first end 111 to form a receiving chamber 1450 for accommodating a portion of the fixing unit 15.

[0162] The fixing unit 15 is cylindrical, and a receiving cavity 150 is formed therein for accommodating at least a portion of the aerosol generating article 200. In some embodiments, the fixing unit 15 may be a cylindrical shape with one end open, and may include a cylindrical body 151 and a support wall 152 disposed at one end of the cylindrical body 151. The support wall 152 can be used to support the aerosol generating article 200. A through hole 1520 is provided on the support wall 152, which allows the radiating structure 13 to at least partially penetrate into the receiving cavity 150. The through hole 1520 may be coaxially arranged with the receiving cavity 150.

[0163] In some embodiments, the fixing unit 15 may include a first cylindrical section 1511, a second cylindrical section 1512, and a third cylindrical section 1513 arranged sequentially along the axial direction. The first cylindrical section 1511, the second cylindrical section 1512, and the third cylindrical section 1513 are arranged sequentially from the first end 111 to the second end 112. A support wall 152 covers the end of the third cylindrical section 1513 away from the second cylindrical section 1512.

[0164] The second cylindrical section 1512 is used to contain at least a portion of the aerosol generating medium 202. The inner diameter of the second cylindrical section 1512 is larger than the inner diameter of the first cylindrical section 1511, and the inner diameter of the second cylindrical section 1512 is greater than or equal to the inner diameter of the third cylindrical section 1513. By increasing the inner diameter of the second cylindrical section 1512, when the aerosol generating product 200 is contained in the fixed unit 15, the outer wall surface of the aerosol generating medium 202 does not contact the inner wall surface of the second cylindrical section 1512, thereby avoiding condensation caused by direct contact between the lower-temperature second cylindrical section 1512 and the higher-temperature aerosol generating medium 202, thus increasing the flue gas extraction efficiency.

[0165] A portion of the inner wall surface of the first cylindrical section 1511 may contact or have a small gap with a portion of the outer wall surface of the aerosol generating product 200 to achieve positioning of the aerosol generating product 200. Another portion of the inner wall surface of the first cylindrical section 1511 may be spaced apart from another portion of the outer wall surface of the aerosol generating product 200, forming a second air-guiding channel for airflow. This also reduces contact between the aerosol generating product 200 and the first cylindrical section 1511, thereby reducing condensation on the first cylindrical section 1511.

[0166] The inner wall of the third section 1513 and the outer wall of the aerosol generating product 200 can also be completely or at least partially non-contact, thereby reducing condensation on the third section 1513.

[0167] Specifically, in some embodiments, a plurality of protrusions 1543 may be provided on the first cylindrical section 1511, and the plurality of protrusions 1543 are distributed at intervals in the circumferential direction of the first cylindrical section 1511. Preferably, the plurality of protrusions 1543 are evenly spaced in the circumferential direction of the first cylindrical section 1511, which is conducive to uniform airflow.

[0168] The protrusion 1543 can extend from one axial end of the first cylindrical section 1511 to the other axial end of the first cylindrical section 1511, that is, in the axial direction, the height of the protrusion 1543 is equal to the height of the first cylindrical section 1511. The extension direction of the protrusion 1543 can be parallel to the axial direction of the first cylindrical section 1511. Of course, in other embodiments, the extension direction of the protrusion 1543 can also be at an angle to the axis of the first cylindrical section 1511.

[0169] As described in this article, “height” refers to the dimension of each part of the fixing unit 15 in the axial direction of the fixing unit 15.

[0170] The protrusions 1543 give the first cylindrical section 1511 a maximum inner diameter D1 and a minimum inner diameter D2. The maximum inner diameter D1 can be defined as the diameter of the circle formed by the sides of the protrusions 1543 away from the central axis of the first cylindrical section 1511, and the minimum inner diameter D2 can be defined as the diameter of the circle formed by the sides of the protrusions 1543 close to the central axis of the first cylindrical section 1511. The thickness of the protrusions 1543 in the radial direction from the inner wall of the first cylindrical section 1511 is (D1-D2) / 2.

[0171] The maximum inner diameter D1 of the first cylindrical section 1511 is greater than the outer diameter d of the aerosol generating product 200. When the aerosol generating product 200 is installed into the fixed unit 15, the interval between every two adjacent protrusions 1543 will form a second air guide channel 1540 for air circulation.

[0172] By adjusting the maximum inner diameter D1, the minimum inner diameter D2, the height H1, and the number of protrusions 1543 of the first cylindrical section 1511, the suction resistance can be adjusted to obtain a suitable suction resistance and ensure accurate counting. Optionally, the number of protrusions 1543 can be 3 to 12, and correspondingly, the number of second air guide channels 1540 can be 3 to 12.

[0173] When the aerosol generating product 200 is inserted into the fixing unit 15, the protrusion 1543 can contact the outer wall surface of the aerosol generating product 200 or leave a small gap to achieve positioning of the aerosol generating product 200. Preferably, the outer diameter d of the aerosol generating product 200 can be equal to or slightly larger than the minimum inner diameter D2 of the first cylindrical section 1511, and the difference (d-D2) between the outer diameter d of the aerosol generating product 200 and the minimum inner diameter D2 of the first cylindrical section 1511 is 0 to 0.5 mm, so that the protrusion 1543 contacts the outer wall surface of the aerosol generating product 200 to achieve positioning, while obtaining a suitable suction resistance.

[0174] The end of the protrusion 1543 facing the first end 111 may have a gradient shape, which allows the aerosol-generated product 200 to smoothly enter the first cylinder section 1511.

[0175] The first cylindrical section 1511 can be fitted with a clearance in the outer conductor unit 11, that is, the outer diameter of the first cylindrical section 1511 is smaller than the inner diameter of the outer conductor unit 11. This reduces the contact area between the fixing unit 15 and the outer conductor unit 11, and reduces the heat conducted to the outer conductor unit 11. The outer wall surface of the first cylindrical section 1511 can be provided with at least one first positioning boss 1516. The outer wall surface of the first cylindrical section 1511 abuts against or has a small gap with the inner wall surface of the outer conductor unit 11 through the first positioning boss 1516, thereby achieving the positioning of the first cylindrical section 1511 in the outer conductor unit 11.

[0176] Preferably, there are at least two first positioning bosses 1516, which are evenly spaced apart in the circumferential direction of the first cylindrical section 1511. Of course, in other embodiments, they may also be distributed in a non-uniformly spaced manner.

[0177] In some other embodiments, there may be only one first positioning boss 1516. This first positioning boss 1516 may extend a certain length in the circumferential direction of the first cylindrical section 1511, which may also realize the positioning of the first cylindrical section 1511 in the outer conductor unit 11. However, the contact area between the first cylindrical section 1511 and the outer conductor unit 11 increases, and the heat insulation effect will be reduced.

[0178] The second cylindrical section 1512 is used to contain the aerosol generating medium 202 of the aerosol generating product 200. The inner wall surface of the second cylindrical section 1512 is smooth and does not have any uneven structure.

[0179] The second section 1512 can be a straight cylinder with a constant inner diameter, or a cone with an inner radial diameter that gradually decreases away from the first section 1511. The inner diameter of the second section 1512 is larger than the outer diameter of the aerosol generating product 200 / aerosol generating medium 202, so that the inner wall surface of the second section 1512 does not contact the outer wall surface of the aerosol generating medium 202. This avoids condensation caused by direct contact between the lower-temperature second section 1512 and the higher-temperature aerosol generating medium 202, thereby increasing the flue gas extraction efficiency.

[0180] Specifically, in this embodiment, the second cylindrical section 1512 is a straight cylinder with a constant inner diameter. The inner diameter D3 of the second cylindrical section 1512 is larger than the outer diameter d of the aerosol generating product 200. When the aerosol generating product 200 is installed in the fixing unit 15, a first annular air passage 1544 is formed between the outer wall surface of the aerosol generating product 200 and the inner wall surface of the second cylindrical section 1512. The outer wall surface of the aerosol generating product 200 does not contact the inner wall surface of the second cylindrical section 1512, thereby avoiding condensation caused by direct contact between the lower temperature second cylindrical section 1512 and the higher temperature aerosol generating medium 202, thus increasing the flue gas extraction efficiency. Preferably, (D3-d) / 2 ≥ 0.5 mm, or (D3-d) ≥ 1 mm, to ensure that the outer wall surface of the aerosol generating product 200 does not contact the inner wall surface of the second cylindrical section 1512.

[0181] By adjusting the inner diameter D3 and height H2 of the second section 1512, optimal condensation suppression and flue gas extraction efficiency can be achieved. Preferably, the height H2 of the second section 1512 is greater than or equal to the height of the aerosol generating medium 202. The inner diameter D3 of the second section 1512 is greater than the maximum inner diameter D1 of the first section 1511.

[0182] The second cylindrical section 1512 can be fitted with a gap in the outer conductor unit 11, that is, the outer diameter of the second cylindrical section 1512 is smaller than the inner diameter of the outer conductor unit 11. In this way, the contact area between the fixing unit 15 and the outer conductor unit 11 can be reduced, and the heat conducted to the outer conductor unit 11 can be reduced. In some embodiments, the outer diameter of the second cylindrical section 1512 can be equal to the outer diameter of the first cylindrical section 1511.

[0183] At least one second positioning boss 1515 may be provided on the outer wall surface of the second cylindrical section 1512. The outer wall surface of the second cylindrical section 1512 abuts against or leaves a small gap with the inner wall surface of the outer conductor unit 11 through the second positioning boss 1515, thereby realizing the positioning of the second cylindrical section 1512 in the outer conductor unit 11.

[0184] Preferably, there are at least two second positioning bosses 1515, which are evenly spaced in the circumferential direction of the second cylindrical section 1512. Of course, in other embodiments, they may also be distributed in a non-uniformly spaced manner.

[0185] In some other embodiments, there may be only one second positioning boss 1515. This second positioning boss 1515 may extend a certain length in the circumferential direction of the second cylindrical section 1512, which may also realize the positioning of the second cylindrical section 1512 in the outer conductor unit 11. However, the contact area between the second cylindrical section 1512 and the outer conductor unit 11 increases, and the heat insulation effect will be reduced.

[0186] An air passage 1510 is provided on the side wall of the second cylindrical section 1512, which connects the first annular air passage 1544 to the airflow sensor. A corresponding through hole connected to the air passage 1510 is provided on the side wall of the outer conductor unit 11.

[0187] In this embodiment, the air passage 1510 is formed on one of the second positioning bosses 1515 (positioning boss 1515a), thus reducing the number of second positioning bosses 1515 that need to be provided. Of course, in other embodiments, the air passage 1510 may not be formed on the second positioning bosses 1515.

[0188] The positioning boss 1515a with the air passage 1510 can be formed by a sealing element (e.g., a silicone sealant) that is separately disposed from the second cylindrical section 1512. In this way, the airtightness can be ensured when the air passage 1510 is connected to the through hole on the outer conductor unit 11. Of course, in other embodiments, the positioning boss 1515a can also be formed by extending outward integrally from the outer wall surface of the second cylindrical section 1512.

[0189] The third section 1513 is used to contain the plug 201 of the aerosol generating product 200. The inner wall surface of the third section 1513 is smooth and does not have a convex or concave structure. The height H3 of the third section 1513 is equal to or substantially equal to the height of the plug 201.

[0190] The third cylindrical section 1513 can be a straight cylinder with a constant inner diameter, or a cone with an inner radial direction that gradually decreases away from the first cylindrical section 1511. The inner diameter of the third cylindrical section 1513 is larger than the outer diameter of the aerosol generating product 200 / aerosol generating medium 202. When the aerosol generating product 200 is installed in the fixing unit 15, a second annular air passage 1545 is formed between the outer wall surface of the aerosol generating product 200 and the inner wall surface of the third cylindrical section 1513.

[0191] Specifically, in this embodiment, the third cylindrical section 1513 is a straight cylinder with a constant inner diameter, and the inner diameter D4 of the third cylindrical section 1513 is smaller than the inner diameter D3 of the second cylindrical section 1512. The second cylindrical section 1512 and the third cylindrical section 1513 can be connected by rounding or chamfering, which is conducive to smooth airflow; of course, the second cylindrical section 1512 and the third cylindrical section 1513 can also be connected by a right angle transition.

[0192] In addition, the inner diameter D4 of the third cylindrical section 1513 is larger than the outer diameter d of the aerosol generating product 200. When the aerosol generating product 200 is installed into the fixing unit 15, a second annular air passage 1545 is formed between the outer wall surface of the aerosol generating product 200 and the inner wall surface of the third cylindrical section 1513.

[0193] The inner diameter D4 of the third section 1513 is less than or equal to the maximum inner diameter D1 of the first section 1511, enabling the third section 1513 to achieve coarse positioning of the aerosol-generated product 200. Simultaneously, D1-D4 also introduces a certain suction resistance, working in conjunction with the first section 1511 to form the suction resistance for user aspiration. Preferably, D4-d ≥ 1 mm, to achieve both coarse positioning of the aerosol-generated product 200 and to work with the first section 1511 to form the suction resistance for user aspiration.

[0194] The top surface of the support wall 152 (i.e., the surface of the support wall 152 facing the receiving cavity 150) is provided with at least one support boss 1521. When the aerosol generating article 200 is housed in the fixing unit 15, the aerosol generating article 200 can abut against the support boss 1521. The bottom surface of the aerosol generating article 200 and the top surface of the support wall 152 define a first air guiding channel 1522.

[0195] Preferably, there are multiple support bosses 1521; more preferably, there are at least three support bosses 1521. These multiple support bosses 1521 can be arranged around the periphery of the through hole 1520. Specifically, these multiple support bosses 1521 can be located at the junction of the support wall 152 and the third cylindrical section 1513. The multiple support bosses 1521 can be evenly spaced in the circumferential direction of the accommodating cavity 150, or they can be non-uniformly spaced.

[0196] When the aerosol generating product 200 is placed in the fixed unit 15, outside air can flow sequentially through the second air guide channel 1540, the first annular air channel 1544, the second annular air channel 1545, and the first air guide channel 1522 to the bottom of the plug 201, and then pass through the plug 201 into the aerosol generating medium 202, carrying out the aerosol generated after the aerosol generating medium 202 is heated. The airflow path in the entire air channel is roughly U-shaped.

[0197] The first air guide channel 1522 is the turning section of the U-shaped air passage. By adjusting the height H4 of the support boss 1521, the speed and direction of the airflow after turning can be adjusted. Optionally, the height H4 of the support boss 1521 is 0.3mm to 1mm.

[0198] The third cylindrical section 1513 is at least partially housed within the receiving chamber 1450. The outer wall of the third cylindrical section 1513 and the inner wall of the receiving chamber 1450 can be fitted with a clearance to reduce contact, thereby reducing heat transfer.

[0199] The lower end face of the support wall 152 (i.e., the surface of the support wall 152 facing away from the receiving cavity 150) may be provided with a protrusion 155. In this embodiment, the protrusion 155 is annular and formed on the outer periphery of the support wall 152. The outer diameter of the protrusion 155 is equal to the outer diameter of the third cylindrical section 1513. The fixing unit 15 can abut against the bottom wall of the receiving chamber 1450 through the protrusion 155. Of course, in other embodiments, the outer diameter of the protrusion 155 may be smaller than the outer diameter of the third cylindrical section 1513; in other embodiments, there may be multiple protrusions 155, which may be distributed at intervals in the circumferential direction of the support wall 152.

[0200] When the fixing unit 15 is housed in the receiving chamber 1450, the protrusion 155 creates a cavity between the lower end face of the support wall 152 and the bottom wall of the receiving chamber 1450. A sealing material (such as adhesive, silicone ring, or silicone pad) can be placed in this cavity to seal the mating gap between the radiation structure 13 and the perforation 1520, thereby achieving the sealing function of the U-shaped airway.

[0201] In some embodiments, the fixing unit 15 may further include an inlet section 1514, which is disposed at the end of the first cylindrical section 1511 facing the first end 111. The inner diameter D5 of the inlet section 1514 is greater than or equal to the maximum inner diameter D1 of the first cylindrical section 1511 and greater than the outer diameter d of the aerosol generating article 200, allowing the aerosol generating article 200 to be smoothly inserted into the fixing unit 15 through the inlet section 1514. The inner wall surface of the inlet section 1514 may be smoothly formed without any protrusions or depressions.

[0202] The fixing unit 15 can be entirely housed within the outer conductor unit 11, or a portion of it can extend beyond the first end 111 of the fixing unit 15. In this embodiment, a portion of the fixing unit 15 extends beyond the first end 111 of the fixing unit 15. The outer wall surface of the fixing unit 15 can protrude to form an outer flange 1517, the outer diameter of which is larger than the inner diameter of the outer conductor unit 11. When the fixing unit 15 is inserted into the outer conductor unit 11, the outer flange 1517 can abut against the end face of the first end 111 of the outer conductor unit 11 to achieve positioning.

[0203] Specifically, in this embodiment, the outer flange 1517 is formed on the first cylindrical section 1511. The first positioning boss 1516 can be disposed on the end face of the outer flange 1517 away from the first end 111, positioning the first cylindrical section 1511 from the top of the outer conductor unit 11, resulting in better positioning. Of course, in other embodiments, the first positioning boss 1516 can also be disposed at a distance from the outer flange 1517.

[0204] The outer conductor unit 11 and the fixing unit 15 may also be provided with a first limiting structure 113 and a second limiting structure 153 that convex and concave with each other, so as to limit the relative position of the fixing unit 15 and the outer conductor unit 11 and prevent the fixing unit 15 from rotating when subjected to force.

[0205] In this embodiment, the second limiting structure 153 is a limiting groove provided on the outer flange 1517, and the first limiting structure 113 is a limiting protrusion protruding upward from the upper end surface of the outer conductor unit 11. When the fixing unit 15 is installed into the outer conductor unit 11, the limiting protrusion is engaged in the limiting groove, thereby ensuring that the fixing unit 15 is assembled in place and that the fixing unit 15 and the outer conductor unit 11 will not rotate relative to each other.

[0206] Understandably, in other embodiments, the first limiting structure 113 may also be a limiting groove, and correspondingly, the second limiting structure 153 may be a limiting protrusion.

[0207] like Figure 29 As shown, in this embodiment, the second cylindrical section 1512 and the third cylindrical section 1513 are both conical in shape that gradually decrease in size in the direction of the inner radial direction away from the first cylindrical section 1511.

[0208] The maximum inner diameter of the second cylindrical section 1512 (i.e., the inner diameter of the end of the second cylindrical section 1512 facing the first cylindrical section 1511) is greater than the maximum inner diameter of the first cylindrical section 1511, and the minimum inner diameter of the second cylindrical section 1512 (i.e., the inner diameter of the end of the second cylindrical section 1512 facing the third cylindrical section 1513) is greater than the outer diameter of the aerosol generating article 200, ensuring that the inner wall surface of the second cylindrical section 1512 does not contact the outer wall surface of the aerosol generating medium 202. Furthermore, when the aerosol generating article 200 is installed in the fixing unit 15, a first annular air passage is formed between the outer wall surface of the aerosol generating article 200 and the inner wall surface of the second cylindrical section 1512.

[0209] The minimum inner diameter of the third cylindrical section 1513 (i.e., the inner diameter of the end of the third cylindrical section 1513 away from the second cylindrical section 1512) is greater than the outer diameter of the aerosol generating article 200. In addition, when the aerosol generating article 200 is installed into the fixing unit 15, a second annular air passage is formed between the outer wall surface of the aerosol generating article 200 and the inner wall surface of the third cylindrical section 1513.

[0210] The maximum inner diameter of the third section 1513 (i.e., the inner diameter of the end of the third section 1513 facing the second section 1512) can be equal to the minimum inner diameter of the second section 1512, and the cone angles of the third section 1513 and the second section 1512 are the same. In other words, the third section 1513 and the second section 1512 transition smoothly without forming a clear boundary in the middle. Thus, the airflow will not undergo abrupt changes when flowing in the first annular air passage 1544 and the second annular air passage 1545.

[0211] In other embodiments, the maximum inner diameter of the third cylindrical section 1513 can be equal to the minimum inner diameter of the second cylindrical section 1512, and the cone angles of the third cylindrical section 1513 and the second cylindrical section 1512 are different. In this way, the airflow can also enter the second annular air passage 1545 more smoothly from the first annular air passage 1544.

[0212] In other embodiments, the maximum inner diameter of the third section 1513 may also be smaller than the minimum inner diameter of the second section 1512.

[0213] Understandably, in other embodiments, only one of the second cylindrical section 1512 and the third cylindrical section 1513 may be conical and the other may be cylindrical. For example, the second cylindrical section 1512 may be conical and the third cylindrical section 1513 may be cylindrical; or the second cylindrical section 1512 may be cylindrical and the third cylindrical section 1513 may be conical.

[0214] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A microwave generating component, characterized in that, Includes a heat sink (31), an RF board (32), a shielding cover (33), and a heat dissipation cap (34). An electromagnetic shielding cavity (330) is formed between the heat sink (31) and the shielding cover (33). The radio frequency board (32) is disposed in the electromagnetic shielding cavity (330) and at least a portion thereof is fitted and installed in contact with the heat sink (31). The heat dissipation cover (34) partially covers the shield (33) and is at least partially attached to the heat dissipation base (31).

2. The microwave generating assembly according to claim 1, characterized in that, The shielding cover (33) includes a cover plate (331) and four side plates (332) extending in the same direction from the side of the cover plate (331), the four side plates (332) being fitted and installed in contact with the heat dissipation cover (34).

3. The microwave generating assembly according to claim 1, characterized in that, The shielding cover (33) is provided with ventilation holes corresponding to the electronic components on the radio frequency board (32).

4. The microwave generating assembly according to claim 1, characterized in that, The thickness of the shield (33) is 0.1mm to 0.2mm.

5. The microwave generating assembly according to claim 1, characterized in that, The heat sink cover (34) includes an end wall (341) and at least one side wall (342) extending in the same direction from the side of the end wall (341), the at least one side wall (342) being fitted and installed in contact with the heat sink base (31).

6. The microwave generating assembly according to claim 5, characterized in that, The sidewall (342) has two sides, which are located on opposite sides of the endwall (341).

7. The microwave generating assembly according to claim 6, characterized in that, One end of the radio frequency board (32) has a radio frequency connection terminal (321). The two sidewalls (342) are located at one end of the endwall (341) facing the radio frequency connection terminal (321) and the other end away from the radio frequency connection terminal (321), respectively.

8. The microwave generating assembly according to claim 1, characterized in that, The microwave generating assembly also includes a main control board, which is attached to the side of the heat sink (34) away from the shielding cover (33) and electrically connected to the radio frequency board (32).

9. The microwave generating assembly according to claim 1, characterized in that, The heat sink (31), the shielding cover (33), and the heat sink cover (34) are all made of metal.

10. An aerosol generating device, characterized in that, It includes a microwave generating assembly (30) as described in any one of claims 1-9 and a microwave heating assembly (10) connected to the microwave generating assembly (30).

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