Aerosol generating device and microwave heating module

Abstract

The utility model relates to an aerosol generating device and a microwave heating module. The microwave heating module comprises an outer conductor unit, an inner conductor unit and a microwave leakproof unit. A cavity and a through hole communicated with the cavity are defined in the outer conductor unit; at least part of the inner conductor unit is located in the through hole; the microwave leakproof unit is arranged between the outer conductor unit and the inner conductor unit, is located at the through hole, and is respectively attached to the outer conductor unit and the inner conductor unit. According to the invention, microwaves can be prevented from leaking from the gap between the inner conductor unit and the outer conductor unit.

Description

Technical Field

[0001] This application relates to the field of electronic atomization technology, and more specifically, to an aerosol generating device and a microwave heating module. Background Technology

[0002] In related technologies, aerosol generation devices using microwave heating suffer from design and manufacturing errors, resulting in minute gaps that prevent the inner and outer conductor units from achieving a perfectly accurate fit. During heating, microwaves within the cavity can easily leak out through these gaps, interfering with the operation of the aerosol generation device and its EMC (electromagnetic compatibility) performance. Utility Model Content

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

[0004] The technical solution adopted by this application to solve its technical problem is: constructing a microwave heating module, including:

[0005] An outer conductor unit defines a cavity and a through hole communicating with the cavity;

[0006] Inner conductor unit, at least a portion of the inner conductor unit is located within the through-hole; and

[0007] A microwave leakage prevention unit is disposed between the outer conductor unit and the inner conductor unit, and is located at the through hole, respectively attached to the outer conductor unit and the inner conductor unit.

[0008] In some embodiments, the microwave leakage prevention unit is disposed on one of the through hole wall and the inner conductor unit, and is in contact with the other of the two.

[0009] In some embodiments, the microwave leakage prevention unit includes at least one first shielding structure; the wall of the through hole is recessed to form at least one first mating groove, the at least one first shielding structure is disposed on the inner conductor unit and fits against the groove wall of the at least one first mating groove.

[0010] In some embodiments, the inner conductor unit includes an impedance matching structure, the impedance matching structure including a sleeve portion located at least partially within the cavity and a fixing portion at least partially passing through the through hole; the at least one first shielding structure is disposed in the circumferential direction of the fixing portion.

[0011] In some embodiments, the first shielding structure is flange-shaped and sleeved on the fixing part;

[0012] Alternatively, the first shielding structure may include a plurality of protruding structures, which are spaced apart in the circumferential direction of the fixing portion.

[0013] In some embodiments, the microwave leakage prevention unit further includes at least one second shielding structure, which is disposed on one of the first shielding structure and the groove wall of the first mating groove, and at least one second mating groove is formed on the other of the two structures, wherein the at least one second shielding structure is in contact with the groove wall of the at least one second mating groove.

[0014] In some embodiments, the second shielding structure is located on the side of the first shielding structure opposite to the sleeve portion and is located in the circumferential direction of the fixing portion.

[0015] In some embodiments, the inner conductor unit further includes a microwave radiating structure disposed on the impedance matching structure and extending at least partially into the cavity.

[0016] In some embodiments, a fixing unit for accommodating at least a portion of the aerosol-generating article is further included; the fixing unit is at least partially located within the cavity, and the impedance matching structure is sleeved on the outer periphery of at least a portion of the fixing unit.

[0017] An aerosol generating device is constructed, comprising the microwave heating module described in any of the foregoing embodiments.

[0018] Implementing the technical solution constructed in this application has at least the following beneficial effects:

[0019] This application, by setting up a microwave leakage prevention unit, can improve the reliability between the contact surface of the outer conductor unit and the inner conductor unit by increasing the contact area between the inner conductor unit and the outer conductor unit around the through hole, or by forming a choke structure or other structural forms to suppress microwave leakage, thereby suppressing microwave leakage from the gap between the inner conductor unit and the outer conductor unit and reducing EMC interference. Attached Figure Description

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the assembly structure of the aerosol generating product and the microwave heating module in one embodiment of this application;

[0022] Figure 2 This is a cross-sectional structural diagram of the microwave heating module in the first embodiment of this application;

[0023] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the outer conductor unit in the diagram;

[0024] Figure 4 yes Figure 2 A schematic diagram of the impedance matching structure and the cross-sectional structure of the microwave leakage prevention unit.

[0025] Figure 5 yes Figure 2 A cross-sectional structural diagram of the fixed unit in the diagram;

[0026] Figure 6 This is a schematic diagram of the structure of a portion of the microwave heating module in the second embodiment of this application;

[0027] Figure 7 This is a cross-sectional structural diagram of the microwave heating module in the third embodiment of this application;

[0028] Figure 8 yes Figure 7 A schematic diagram of the impedance matching structure and the microwave leakage prevention unit.

[0029] Figure 9 This is a schematic diagram of the structure of a portion of the microwave heating module in the fourth embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the structure of a portion of the microwave heating module in the fifth embodiment of this application;

[0031] Figure 11 This is a schematic diagram of the structure of a portion of the microwave heating module in the sixth embodiment of this application. Detailed Implementation

[0032] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application are now described in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inner", "outer", etc., 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 application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly 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.

[0037] like Figure 1 As shown, this application constructs a microwave heating module 1 and an aerosol generating device having the microwave heating module 1. The microwave heating module 1 can generate aerosols by feeding a microwave-heated aerosol generating matrix, which can then be used by the user.

[0038] Figures 2 to 5A microwave heating module according to a first embodiment of this application is shown, comprising an outer conductor unit 10, an inner conductor unit 20, a microwave leakage prevention unit 30, and a fixing unit 40. The outer conductor unit 10 can confine microwave radiation and defines a cavity 110 with one open end. At least a portion of the inner conductor unit 20 and at least a portion of the fixing unit 40 can be disposed in the cavity 110. The fixing unit 40 defines a receiving cavity 400 in which at least a portion of the aerosol-generating article 2 can be detachably inserted. The inner conductor unit 20 can extend at least partially into the fixing unit 40, and by feeding microwaves, an energy field is generated in the area defined by the outer conductor unit 10, thereby heating the aerosol-generating article 2 located in the receiving cavity 400. The microwave leakage prevention unit 30 is disposed between the outer conductor unit 10 and the inner conductor unit 20 to reduce microwave leakage within the cavity 110 during heating.

[0039] It should be understood that the outer conductor unit 10, the inner conductor unit 20, and the microwave leakage prevention unit 30 can be made of metallic materials or other highly conductive materials. For example, they can be made of at least one of gold, silver, copper, aluminum, iron, gold-containing alloys, aluminum-containing alloys, copper-containing alloys, iron-containing alloys, stainless steel, etc. Alternatively, they may include a substrate layer made of a non-metallic material and a metallic coating, such as gold-plated stainless steel, applied to the inner surface of the substrate layer. No specific limitations are imposed here.

[0040] The aerosol generating article 2 can be columnar, containing an aerosol generating matrix inside. The aerosol generating matrix can be a solid material in the form of filaments, granules, or flakes made from plant leaves, flowers, and / or stems, and aroma components, propylene glycol, glycerol, or water can be further added to the solid material.

[0041] like Figure 3 As shown, the outer conductor unit 10 may also define a through hole 1110, which can communicate with the cavity 110 and the outside world respectively. (See also...) Figure 2 At least a portion of the inner conductor unit 20 can be inserted into the through hole 1110 to achieve assembly with the outer conductor unit 10, while ensuring stable ohmic contact between the two. The microwave leakage prevention unit 30 can be disposed at the through hole 1110 and is respectively attached to the outer conductor unit 10 and the inner conductor unit 20.

[0042] By setting up a microwave leakage prevention unit 30, the contact area between the inner conductor unit 20 and the outer conductor unit 10 around the through hole 1110 can be increased, or a choke structure or other structure that suppresses microwave leakage can be formed to improve the reliability of the contact surface between the outer conductor unit 10 and the inner conductor unit 20, reduce microwave leakage from the gap between the inner conductor unit 20 and the hole wall of the through hole 1110, and reduce interference with EMC.

[0043] The outer conductor unit 10 may have a first end 10A and a second end 10B. The ends of the cavity 110 and the receiving cavity 400 corresponding to the first end 10A are open ends, and the aerosol generating article 2 can be detachably inserted into them through the open ends.

[0044] Specifically, the outer conductor unit 10 may include a cylindrical body 11 with one open end. The cylindrical body 11 may include a first end wall 111 and a cylindrical first side wall 112. One end of the first side wall 112 is connected to the first end wall 111 in the circumferential direction, and together they define a cavity 110 with one open end. A through hole 1110 may be provided at the second end 10B of the outer conductor unit 10. Specifically, it may be formed on the first end wall 111. At least a portion of the inner conductor unit 20 passes through the first end wall 111 and extends partially into the cavity 110.

[0045] In some other alternative embodiments, the through hole 1110 may also be provided on the first sidewall 112.

[0046] The cylindrical body 11 can be open at one end, and the cavity 110 it defines can be cylindrical. The fixing unit 40 is generally open at one end and is at least partially disposed within the cylindrical body 11. The shape of the accommodating cavity 400 is adapted to the shape of the aerosol generating article 2, for example in... Figure 2 and Figure 5 All of them are cylindrical.

[0047] Optionally, the cylinder 11 and the fixing unit 40 can also be configured as other shapes such as polygonal columnar, cylindrical, elliptical columnar, or irregular, and their shapes can be the same or different. The aerosol generating product 2 can also be other shapes such as polygonal columnar, elliptical columnar, or irregular columnar. The shape of the accommodating cavity 400 can correspond to the aerosol generating product 2, or it can be configured as a different shape from the aerosol generating product 2.

[0048] like Figure 2 and Figure 4 As shown, in some embodiments, the inner conductor unit 20 may include a microwave radiating structure 21 and an impedance matching structure 22. The microwave radiating structure 21 is longitudinally elongated, disposed on the impedance matching structure 22, and passes through the fixing unit 40, extending at least partially into the accommodating cavity 400 for insertion into the aerosol generating article 2 to heat the aerosol generating matrix. The impedance matching structure 22 passes through the through hole 1110 and is partially located within the cavity 110, making ohmic contact with both the outer conductor unit 10 and the microwave radiating structure 21 to ensure normal microwave feed.

[0049] Specifically, the microwave radiating structure 21 can be elongated columnar or needle-shaped to facilitate insertion into the aerosol generating product 2. A through-hole 220 can be formed on the impedance matching structure 22, through which the microwave radiating structure 21 can pass, forming an ohmic contact. This allows the microwave radiating structure 21 to feed microwaves into the impedance matching structure 22 while simultaneously assembling the microwave radiating structure 21. The impedance matching structure 22 passes through the through-hole 1110 to achieve an ohmic contact with the outer conductor unit 10. The microwave radiating structure 21, through the impedance matching structure 22, achieves an ohmic structure with the outer conductor unit 10, ensuring normal microwave feeding into the outer conductor unit 10.

[0050] In some embodiments, the impedance matching structure 22 may include a sleeve portion 221 and a fixing portion 222. The sleeve portion 221 and the fixing portion 222 are coaxially connected, the fixing portion 222 is at least partially inserted into the through hole 1110, the sleeve portion 221 is located in the cavity 110, and the through hole 220 passes through the axis of the sleeve portion 221 and the fixing portion 222.

[0051] Specifically, the sleeve portion 221 can be a disc-shaped structure with one open end, fitted onto the outer periphery of one end of the fixing unit 40 to achieve assembly and positioning of the fixing unit 40 within the cavity 110. The fixing unit 40 can also define a connecting hole 411 communicating with the receiving cavity 400. The connecting hole 411 can be connected to the through hole 220 to allow the microwave radiation structure 21 to pass through the connecting hole 411 and extend from the connecting hole 411 into the receiving cavity 400. The fixing portion 222 can be a columnar structure, smaller in size than the sleeve portion 221, to facilitate insertion into the through hole 1110 and to form an ohmic contact with the first end wall 111.

[0052] like Figure 2 As shown, the cylinder 11, microwave radiation structure 21, impedance matching structure 22, and fixing unit 40 can be coaxially arranged. The through hole 1110 can be located on the axis of the cylinder 11, and the connecting hole 411 can be located on the axis of the fixing unit 40, so that the microwave radiation structure 21 can extend along the axis into the accommodating cavity 400. This facilitates assembly and improves the uniformity of the temperature field in the accommodating cavity 400 during heating, thereby improving the user experience.

[0053] In some embodiments, the microwave leakage prevention unit 30 is located at the through hole 1110, which can be understood as being disposed on one of the hole wall of the through hole 1110 and the impedance matching structure 22, and being in contact with the other of the two.

[0054] For example, such as Figure 2 and Figure 4As shown, the microwave leakage prevention unit 30 may include at least one first shielding structure 31, which is disposed in the circumferential direction of the fixing part 222. At least one first mating groove 1111 is formed on the wall of the through hole 1110 by an axial outward recess. The first shielding structure 31 can fit against the groove wall of the first mating groove 1111.

[0055] Furthermore, the first mating groove 1111 can be located at the end of the through hole 1110 near the cavity 110, and the side of the first shielding structure 31 facing the sleeve part 221 is exposed inside the cavity 110, while the side away from the sleeve part 222 is attached to and abuts against the groove wall of the first mating groove 1111.

[0056] It should be understood that the aforementioned microwave leakage prevention unit 30 is respectively attached to the outer conductor unit 10 and the inner conductor unit 20. This can mean that the entire outer surface of the microwave leakage prevention unit 30 is attached to both the outer conductor unit 10 and the inner conductor unit 20. For example, the end face and side face of the first shielding structure 31 are attached to the groove wall of the first mating groove 1111. Alternatively, while ensuring microwave leakage is suppressed, there may be gaps between the outer surface of part of the microwave leakage prevention unit 30 and the outer conductor unit 10 and / or the inner conductor unit 20. For example, the side of the first shielding structure 31 facing away from the sleeve portion 222 is attached to the groove wall of the first mating groove 1111, while there are gaps between the outer peripheral side and the groove wall of the first mating groove 1111.

[0057] It is important to understand that because the diameter of the fixing part 222 of the impedance matching structure 22 is relatively small, gaps can easily form between it and the contact surface of the outer conductor unit 10 during actual processing, leading to microwave leakage. By setting the first shielding structure 31 and the first mating groove 1111, the overall structure after the first shielding structure 31 and the impedance matching structure 22 are combined has a larger contact area with the outer conductor unit 10, making the contact between the two more reliable, thereby preventing microwave leakage from the contact point. The same principle applies to the first shielding structure 31 being combined with the outer conductor unit 10, and will not be elaborated further here.

[0058] It should be understood that the combination between the first shielding structure 31 and the impedance matching structure 22 or the outer conductor unit 10 can be achieved through processes such as welding, integral molding, and interference fit, without specific limitations here.

[0059] like Figure 4 As shown, in some embodiments, the first shielding structure 31 is in the shape of an annular flange and is fitted onto the fixing part 222.

[0060] In some other alternative embodiments, the first shielding structure 31 may also be configured as a polygonal flange, an elliptical flange, an irregular flange, etc.

[0061] See also Figure 2 In some embodiments, the fixing portion 222 may include a first portion 2221 and a second portion 2222. The first portion 2221 is located axially between the second portion 2222 and the sleeve portion 221, and its outer diameter is larger than the outer diameter of the second portion 2222 and smaller than the outer diameter of the sleeve portion 221. The first portion 2221 is located inside the cavity 110, and the second portion 2222 passes through the through hole 1110. The first shielding structure 31 is disposed at the connection between the first portion 2221 and the second portion 2222 to correspond to the first mating groove 1111 located at the end of the through hole 1110 near the cavity 110.

[0062] In some other alternative embodiments, the first mating groove 1111 may also be located at one end of the through hole 1110 away from the cavity 110, or at any position in the middle of the through hole 1110. In this embodiment, the first shielding structure 31 may be fitted onto the second part 2222.

[0063] In some other alternative embodiments, the microwave leakage prevention unit 30 is located at the through hole 1110, which can also be understood as its end located outside the through hole 1110. For example, it is located inside the cavity 110 and at the connection between the cavity 110 and the through hole 1110, and at least a portion of the microwave leakage prevention unit 30 can be attached to the first end wall 111. In this embodiment, the first mating groove 1111 may not be provided in the through hole 1110, and the first shielding structure 31 may be sleeved on the first portion 2221.

[0064] In some other alternative embodiments, the microwave leakage prevention unit 30 can also be disposed on the outer conductor unit 10. For example, it can protrude from the wall of the through hole 1110, and the fixing part 222 can be provided with a corresponding first mating groove 1111. For another example, it can be disposed on the end face of the first end wall 111 facing or away from the cavity 110, and fit against the outer peripheral surface of the first part 2221, etc.

[0065] In other alternative embodiments, the number of the first shielding structures 31 can be two, three, or more, and the number of the first mating grooves 1111 can be set accordingly. In this case, the first shielding structures 31 can be spaced apart along the axial direction of the fixing part 222 to form a more complex concave-convex mating structure with the groove walls of the multiple first mating grooves 1111 and the hole walls of the through holes 1110, thereby further improving the microwave suppression effect.

[0066] like Figure 4As shown, in some embodiments, a insertion slot 2220 may be formed on the first portion 2221 for the microwave feed module to be inserted, thereby realizing the connection between the microwave feed module and the impedance matching structure 22. The larger outer diameter of the first portion 2221 facilitates the layout of the insertion slot 2220 and improves the structural strength of the impedance matching structure 22.

[0067] In some other alternative embodiments, the slot 2220 may also be configured as a socket communicating with the via 220.

[0068] See also Figure 2 In some embodiments, the end of the second portion 2222 away from the first portion 2221 may extend outside the outer conductor unit 10. The microwave heating module 1 may also include a limiting member (not shown in the figure), which may be disposed on the portion of the second portion 2222 extending outside the outer conductor unit 10 and abutting against the first end wall 111. This arrangement can cooperate with the first shielding structure 31 and the groove wall of the first mating groove 1111 to realize the positioning of the impedance matching structure 22 in the outer conductor unit 10, and at the same time, it can further ensure that the impedance matching structure 22 can make stable ohmic contact with the outer conductor unit 10.

[0069] Specifically, a threaded structure may be provided on the outer periphery of the second part 2222. This limiting member can be a nut, and the limiting member and the impedance matching structure 22 can be connected by threads to achieve positioning of the impedance matching structure 22.

[0070] like Figure 5 As shown, in some embodiments, the fixing unit 40 may include a cylindrical second sidewall 42 and a second endwall 41 away from the open end. One end of the second sidewall 42 is connected to the second endwall 41 in the circumferential direction, and a connecting hole 411 is formed on the second endwall 41.

[0071] It should be understood that the fixing unit 40 can be made of materials such as lossless or low-loss dielectrics. For example, the fixing unit 40 may be made of plastic, Teflon, PEEK (polyetheretherketone), PTFE (polytetrafluoroethylene), quartz, alumina ceramic, or various composite wave-transparent materials. No specific limitations are made here.

[0072] In some embodiments, at least one first air guide groove 421 is formed on the inner surface of the second sidewall 42, which extends along the axial direction of the fixing body 41. At least one second air guide groove 412 is formed on the side of the second endwall 41 facing the accommodating cavity 400, and the second air guide groove 412 communicates with the first air guide groove 421 for air guiding.

[0073] When the aerosol generating product 2 is inserted into the accommodating cavity 400, the walls of the first air guide groove 421 and the second air guide groove 412, which are connected to each other, define an interconnected airflow channel with the side wall and end wall of the aerosol generating product 2, respectively. This airflow channel can communicate with the air guide inside the aerosol generating product 2 and is connected to the outside through the opening end of the accommodating cavity 400 for the user to perform suction.

[0074] like Figure 2 As shown, in some embodiments, the microwave heating module 1 may further include a microwave shielding unit 60, which may be disposed between the first end 10A of the outer conductor unit 10 and the fixing unit 40 to shield the gap between the outer conductor unit 10 and the fixing unit 40 at the first end 10A, thereby preventing microwave leakage from the opening end of the cavity 110.

[0075] It should be understood that at least part of the microwave shielding unit 60 may be a microwave absorbing structure made of a material with strong microwave absorption properties. The material may include metal, water, silicon carbide, metal mesh with a pore size of less than or equal to 3 mm, etc., without specific limitations.

[0076] In some embodiments, the microwave heating module 1 further defines a sensing air channel, which can be connected to the first air guide groove 421 and the second air guide groove 412 for connecting the airflow sensing module and monitoring the number of suction ports of the user.

[0077] Specifically, such as Figure 2 and Figure 3 As shown, the outer conductor unit 10 may further include a tubular air guide section 12, which is disposed on the first side wall 112 of the cylinder 11 and defines an air guide channel 120. The air guide channel 120 is connected to the cavity 110 through a hole on the cylinder 11. The second side wall 42 of the fixing unit 40 is correspondingly defined with an air guide hole 422, which is connected to the air guide channel 120, together forming a sensing air channel.

[0078] In some embodiments, the aerosol generating device may further include an airflow sensing module (not shown) that is connected to a sensing airway. During the user's inhalation, the airflow channel generates airflow following the user's inhalation, thereby creating a negative pressure change at the sensing airway. The airflow sensing module can calculate the number of inhalations by sensing the negative pressure change within the airway. Furthermore, the aerosol generating device can precisely control the microwave heating temperature to achieve a better taste by adjusting the number of inhalations.

[0079] Specifically, the airflow sensing module can be located at the end of the air guide 12 away from the fixed body 41.

[0080] It should be understood that the airflow sensing module can use existing microphones or MEMS sensors that can detect changes in negative pressure, and no specific limitations are made here.

[0081] In some embodiments, the aerosol generating device may further include a microwave feed module (not shown in the figure), which can be inserted into the insertion slot 2220, make ohmic contact with the impedance matching structure 22 ohms, and be externally connected to a microwave sound generating unit to feed microwaves into the microwave heating module 1.

[0082] The outer conductor unit 10 may further include a mounting portion 13 disposed outside the cylinder 11 and defining a mounting through hole 130 communicating with the cavity 110. The microwave feed module can extend into the cavity 110 through the mounting through hole 130 and make ohmic contact with the inner conductor unit 20 to achieve microwave feed.

[0083] Specifically, the mounting part 13 can be located at the second end 10B of the cylinder 11 and correspond to the insertion slot 2220 on the impedance matching structure 22.

[0084] Figure 6 The diagram shows a portion of the microwave heating module 1A in the second embodiment of this application. The main difference between this module and the microwave heating module 1A in the first embodiment is that, in this embodiment, the first shielding structure 31A includes multiple protruding structures spaced apart circumferentially on the fixing portion 222. Correspondingly, the outer conductor unit ( Figure 6 The first mating groove (not shown in the image) can also be configured as multiple slots to correspond to multiple protruding structures.

[0085] By arranging multiple protrusions at intervals along the circumference, a microwave choke structure can be formed to suppress microwave leakage, ensure electromagnetic compatibility (EMC), and improve the utilization efficiency of microwave energy.

[0086] Specifically, the protruding structure can be in the form of a rectangular block, a hemispherical shape, a polygonal shape, a cylindrical shape, an irregular shape, etc., without any specific limitation.

[0087] In some embodiments, the fixing portion 222A may further include a third portion 2223A, which may be axially disposed between the first portion 2221A and the second portion 2222A, with a diameter between the diameter of the first portion 2221A and the diameter of the second portion 2222A, and is adjacent to the through hole ( Figure 6 The aperture (not shown) is adapted to fit within the through hole. This first shielding structure 31A can be arranged circumferentially in the third part 2223A.

[0088] Because the outer periphery of the second part 2222A is provided with a threaded structure, by providing the third part 2223A, the overall structure formed by the impedance matching structure 22A and the first shielding structure 31A and the outer conductor unit can be further improved. Figure 6 The tightness of the contact between (not shown in the image) is used to suppress microwave leakage.

[0089] Furthermore, the first shielding structure 31A can be located along the axial direction of the impedance matching structure 22A at one end of the third part 2223A near the first part 2221A.

[0090] Figure 7 and Figure 8 The microwave heating module 1B in the third embodiment of this application is shown. Its main difference from the microwave heating module 1 in the first embodiment is that, in this embodiment, the microwave leakage prevention unit 30B includes a second shielding structure 32B. The second shielding structure 32B is disposed on the first shielding structure 31B. A second mating groove 1112B is also recessed on the groove wall of the first mating groove 1111B, and its groove wall can fit against the second shielding structure 32B to further improve the microwave suppression effect.

[0091] By adding a second shielding structure 32B and a second mating groove 1112B, the unevenness of the contact surface between the impedance matching structure 22B and the outer conductor unit 10B can be further enhanced to improve the reliability of their contact and further prevent microwave leakage.

[0092] Specifically, the second shielding structure 32B is disposed on the flange surface of the first shielding structure 31B, and is arranged circumferentially along the fixing part 222B, and is spaced apart from the fixing part 222B.

[0093] Furthermore, for the microwave heating module 1B where the first mating groove 1111B is located at the end of the through hole 1110B near the cavity 110B, the second shielding structure 32B can be disposed on the side of the first shielding structure 31B facing away from the sleeve portion 221B. When the first mating groove 1111B is located at any position in the middle of the through hole 1110B, the second shielding structure 32B can also be disposed on the end face of the first shielding structure 31B near the sleeve portion 221B, or can be disposed on the two opposite sides of the first shielding structure 31B along the axial direction of the impedance matching structure 22B.

[0094] It should be understood that the second shielding structure 32B is fitted to the groove wall of the second mating groove 1112B. This can be a complete fit between the second shielding structure 32B and the groove wall of the second mating groove 1112B. Alternatively, a gap can exist between the second shielding structure 32B and the groove wall of the second mating groove 1112B, provided that microwave leakage is suppressed by the second shielding structure 32B. For example... Figure 7As shown, the end face of the second shielding structure 32B away from the first shielding structure 31B is in contact with the groove wall of the second mating groove 1112B, and there are gaps between the two sides of the second shielding structure 32B that are connected to the first shielding structure 31B and the groove wall of the second mating groove 1112B.

[0095] like Figure 8 As shown, in some embodiments, the second shielding structure 32B may include a plurality of elongated strip structures, which may be circumferentially spaced on the flange surface of the first shielding structure 31B along the fixing part 222B. The cross-section of each strip structure may be semi-circular, polygonal, irregular, etc., and is not specifically limited here.

[0096] Specifically, it can be evenly spaced on the first shielding structure 31B and is in the shape of an arc strip, so that the outer periphery of the second shielding structure 32B is roughly an open circle or ellipse, etc.

[0097] In some other alternative embodiments, the strip structure may also be configured as a straight line, a wave shape, a bend shape, etc., and at least some of the strip structures may have shapes that are different from other strip structures.

[0098] In some other alternative embodiments, the second shielding structure 32B can also be configured as a ring structure, protruding from the flange surface of the first shielding structure 31B. Specifically, its ring structure can be a circular ring, a polygonal ring, an elliptical ring, an irregular ring, etc., and its cross-section can be semi-circular, polygonal, irregular, etc., without any specific limitation.

[0099] In some other alternative embodiments, the second shielding structure 32B may also be disposed on the groove wall of the first mating groove 1111B. Correspondingly, the second mating groove 1112B is disposed on the first shielding structure 31B.

[0100] It should be understood that when the number of the first shielding structure 31B and the first mating groove 1111B is two, three, or a plurality of multiples, the number of the second shielding structure 32B can also be set to two, three, or a plurality of multiples. Furthermore, its number can be less than the number of the first shielding structures 31B, and it may only be arranged on the groove walls of a portion of the first shielding structures 31B or the first mating groove 111B. Alternatively, at least a portion of the first shielding structures 31B or the groove walls of the first mating groove 111B may have two second shielding structures 31B.

[0101] Figure 9 A portion of the microwave heating module 1C in the fourth embodiment of this application is shown. The main difference between this module and the microwave heating module 1B in the third embodiment is that, in this embodiment, the second shielding structure 32C includes multiple block structures.

[0102] Furthermore, the fixing part 222C also includes a third part 2223C, which is axially disposed between the first part 2221C and the second part 2222C, for passing through the through hole ( Figure 9 (Not shown in the image). The first shielding structure 31C is fitted onto the third part 2223C. The second shielding structure 32C is arranged circumferentially along the third part 2223C and is connected to the flange face of the first shielding structure 31C and the outer peripheral face of the third part 2223C, respectively.

[0103] Specifically, the block structure can be polygonal, hemispherical, columnar, irregular, etc., without any specific limitation.

[0104] Figure 10 The fifth embodiment of the present application shows a portion of the microwave heating module 1D, which differs from the microwave heating module 1B in the third embodiment in that, in this embodiment, the second shielding structure 32D consists of multiple protrusions.

[0105] By shaping the second shielding structure 32D into bumps or protrusions, a microwave choke structure can be formed. This choke structure can work in conjunction with the first shielding mechanism 31D, increasing the impedance matching structure 22D and the outer conductor unit ( Figure 10 (Not shown in the image) While ensuring the reliability of the contact surface, it further prevents microwave leakage. Simultaneously, the convex second shielding structure 32D can also reduce heat transfer from the inner conductor unit to the outer conductor unit.

[0106] Specifically, the protrusion can be hemispherical, semi-ellipsoidal, etc., without any specific limitation here.

[0107] Figure 11 The sixth embodiment of this application shows a portion of the microwave heating module 1E, which differs from the microwave heating module 1B in the third embodiment in that, in this embodiment, the second shielding structure 32E is a plurality of columnar structures.

[0108] Specifically, the axis of the columnar structure can be parallel to the axis of the impedance matching structure 22E.

[0109] Furthermore, the columnar structure can take the form of a cylinder, a polygonal column, an elliptical column, an irregular column, etc., without any specific limitation.

[0110] Understandably, the above-mentioned technical features can be used in any combination without restriction.

[0111] The above embodiments merely illustrate specific implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application's patent. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of this application, and can also make several modifications and improvements, all of which fall within the protection scope of this application. Therefore, any equivalent transformations and modifications made within the scope of the claims of this application should be covered by the claims of this application.

Claims

1. A microwave heating module, characterized in that, include: An outer conductor unit defines a cavity and a through hole communicating with the cavity; An inner conductor unit, at least a portion of which is located within the through-hole; as well as A microwave leakage prevention unit is disposed between the outer conductor unit and the inner conductor unit, and is located at the through hole, respectively attached to the outer conductor unit and the inner conductor unit.

2. The microwave heating module according to claim 1, characterized in that, The microwave leakage prevention unit is disposed on one of the through hole wall and the inner conductor unit, and is in contact with the other of the two.

3. The microwave heating module according to claim 2, characterized in that, The microwave leakage prevention unit includes at least one first shielding structure; the hole wall of the through hole is recessed to form at least one first mating groove, and the at least one first shielding structure is disposed on the inner conductor unit and fits against the groove wall of the at least one first mating groove.

4. The microwave heating module according to claim 3, characterized in that, The inner conductor unit includes an impedance matching structure, which includes a sleeve portion located at least partially within the cavity and a fixing portion passing through the through hole; the at least one first shielding structure is disposed in the circumferential direction of the fixing portion.

5. The microwave heating module according to claim 4, characterized in that, The first shielding structure is flange-shaped and is fitted onto the fixing part; Alternatively, the first shielding structure may include a plurality of protruding structures, which are spaced apart in the circumferential direction of the fixing portion.

6. The microwave heating module according to claim 4, characterized in that, The microwave leakage prevention unit further includes at least one second shielding structure, which is disposed on one of the first shielding structure and the groove wall of the first mating groove, and at least one second mating groove is formed on the other of the two structures, and the at least one second shielding structure is in contact with the groove wall of the at least one second mating groove.

7. The microwave heating module according to claim 6, characterized in that, The second shielding structure is located on the side of the first shielding structure away from the sleeve portion, and is located in the circumferential direction of the fixing portion.

8. The microwave heating module according to any one of claims 4 to 7, characterized in that, The inner conductor unit further includes a microwave radiation structure disposed on the impedance matching structure and extending at least partially into the cavity.

9. The microwave heating module according to any one of claims 4 to 7, characterized in that, It also includes a fixing unit for accommodating at least a portion of the aerosol-generating article; the fixing unit is at least partially located within the cavity, and the impedance matching structure is sleeved on the outer periphery of at least a portion of the fixing unit.

10. An aerosol generating device, characterized in that, Includes the microwave heating module as described in any one of claims 1 to 9.

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