EP4616731A1

EP4616731A1 - Aerosol generation device and microwave heating assembly therefor

Info

Publication number: EP4616731A1
Application number: EP22964922.3A
Authority: EP
Inventors: Dongjian Li; Feng Liang; Jing Du; Yonghai LAN; Yang Deng
Original assignee: Smoore International Holdings Ltd
Current assignee: Smoore International Holdings Ltd
Priority date: 2022-11-07
Filing date: 2022-11-18
Publication date: 2025-09-17
Also published as: CN117981911A; WO2024098455A1; EP4616731A4

Abstract

An aerosol generation device and a microwave heating assembly therefor. The microwave heating assembly comprises: an outer conductor unit, which is tubular and comprises a first open end and a first closed end opposite the first open end; and an inner conductor unit, which is arranged in the outer conductor unit and defines a fixing space for limiting an aerosol generating product. The inner conductor unit comprises a first fixed end and at least one first free end, wherein the first fixed end is combined with a wall surface at a periphery of the first open end, and the at least one first free end extends in a direction towards the first closed end. According to the aerosol generation device and the microwave heating assembly therefor, the inner conductor unit has the functions of adjusting microwave field distribution and resonance frequency and also fixing the aerosol generating product, thereby facilitating an improvement in the microwave energy absorption efficiency of the aerosol generating product.

Description

TECHNICAL FIELD

The present invention relates to the field of electronic atomization, and in particular to an aerosol generation device and a microwave heating assembly therefor.

BACKGROUND

In the related art, a microwave-heated aerosol generation device includes a receiving seat for limiting and fixing an aerosol generating product. The receiving seat is usually made of a non-metallic material and has microwave loss. During microwave heating, the energy generated by microwaves will be absorbed to a greater or lesser extent, thereby reducing the energy absorption by the aerosol generating product and degrading the overall carbonization effect of the aerosol generating product. If the carbonization effect of the tobacco medium is improved, the temperature needs to be increased, but this will increase the energy consumption, correspondingly, the cost is increased, and the service life of the device is shortened.
In addition, the aerosol generation device in the related art further includes a probe disposed in a cavity for inserting the aerosol generating product. After the user sucks, the probe and the cavity are prone to dirt, which poses a cleaning problem. In addition, the dirt remaining on the probe will further affect the performance of a temperature measuring element disposed in the probe, reduce the accuracy of the temperature measurement and the temperature control, and affect the suction experience of the user on the aerosol generating product.

SUMMARY

TECHNICAL PROBLEMS

A technical problem to be solved by the present invention is to provide an improved aerosol generation device and a microwave heating assembly therefor.

SOLUTION TO THE PROBLEMS

TECHNICAL SOLUTIONS

A technical solution adopted by the present invention to solve the technical problem is to provide a microwave heating assembly for an aerosol generation device, wherein the microwave heating assembly comprises:

an outer conductor unit that is tubular and comprises a first open end and a first closed end opposite the first open end; and
an inner conductor unit disposed in the outer conductor unit and defining a fixing space configured for fixing an aerosol generating product,
wherein the inner conductor unit comprises a first fixed end and at least one first free end, the first fixed end is combined with a wall surface at a periphery of the first open end, and the at least one first free end extends in a direction towards the first closed end.

In some embodiments, the fixing space penetrates through the inner conductor unit longitudinally.
In some embodiments, the first fixed end is integrally combined with the outer conductor unit, or the first fixed end is in ohmic contact with the outer conductor unit.
In some embodiments, the inner conductor unit is made of a metallic material, or a surface of the inner conductor unit is coated with a conductive layer.
In some embodiments, the inner conductor unit comprises a conductor post that is tubular, and an inner periphery of the conductor post forms the fixing space.
In some embodiments, the conductor post is coaxial with the outer conductor unit.
In some embodiments, the conductor post is cylindrical, and an inner diameter of the conductor post is equal to or slightly greater than an outer diameter of the aerosol generating product.
In some embodiments, the inner conductor unit comprises:

a conductor portion comprising a first surface and a second surface opposite to each other, and a penetration channel penetrating the first surface and the second surface, the first surface being combined with the wall surface at the periphery of the first open end, and the penetration channel being in communication with the first open end; and
at least one extension portion comprising a second fixed end and a second free end, the second fixed end being combined with the second surface, and the second free end extending towards the first closed end,
wherein an inner peripheral wall of the conductor portion and a side wall of the at least one extension portion together define the fixing space.

In some embodiments, the conductor portion is cylindrical.
In some embodiments, the conductor portion is coaxial with the outer conductor unit.
In some embodiments, an inner diameter of the conductor portion is equal to or slightly greater than a diameter of the aerosol generating product.
In some embodiments, an inner peripheral surface of the conductor portion is provided with at least one first protrusion and/or at least one first groove configured for forming a first air inlet gap.
In some embodiments, the extension portion extends in a direction parallel to an axial direction of the conductor portion.
In some embodiments, the extension portion is configured as an elongated arc-shaped structure, a linear strip-shaped structure, a curved structure, or a combination of at least one of the elongated arc-shaped structure, the linear strip-shaped structure, and the curved structure.
In some embodiments, the at least one extension portion comprises at least two extension portions evenly spaced in a circumferential direction of the conductor portion.
In some embodiments, the at least one extension portion comprises at least two extension portions, the at least two extension portions comprises at least two pairs of extension portions, each pair of extension portions has a length different from another pair of extension portions, and the at least two pairs are alternately and uniformly distributed in a circumferential direction of the conductor portion.
In some embodiments, the microwave heating assembly further comprises a temperature measuring assembly configured for measuring a temperature,
the inner conductor unit is provided with a receiving hole for accommodating the temperature measuring assembly, and the receiving hole extends from the first surface to the second free end of one of the extension portions in a direction parallel to an axial direction of the conductor portion.
In some embodiments, a temperature sensing probe of the temperature measuring assembly is disposed at the second free end of one extension portion having the highest electric field intensity of the at least one extension portion.
In some embodiments, the inner conductor unit further comprises a hollow portion provided on the conductor portion and/or the at least one extension portion.
In some embodiments, a shape of the hollow portion comprises a circular shape, a rectangular shape, or a curved shape.
In some embodiments, the first closed end is provided with an inner end surface opposite the first open end,
the inner end surface is configured to abut against a product end surface of the aerosol generating product, and a second air inlet gap is formed between the product end surface and the inner end surface when the product end surface abuts against the inner end surface.
In some embodiments, the inner end surface is provided with at least one second protrusion and/or at least one second groove, and the second air inlet gap is formed between the inner end surface and the product end surface via the at least one second protrusion and/or the at least one second groove.
In some embodiments, at least one first through hole in communication with the outside is provided penetrating through the first closed end axially, and the second air inlet gap is formed between the inner end surface and the product end surface via the at least one first through hole.
In some embodiments, the first closed end is provided with a recessed portion recessed away from the first open end, the recessed portion is opposite to the first open end and having a diameter slightly greater than or equal to a diameter of the aerosol generating product.
In some embodiments, at least one second through hole in communication with the outside is provided penetrating through a bottom of the recessed portion axially.
In some embodiments, the microwave heating assembly further comprises:

a probe device, wherein one end of the probe device is combined with an end surface of the first closed end facing the first open end, and another end of the probe device extends towards the first open end, and
the inner conductor unit is disposed on an outer periphery of the probe device and spaced apart from the probe device.

In some embodiments, the microwave heating assembly further comprises:

a receiving seat that is tubular and mounted on the inner conductor unit, wherein the receiving seat comprises a second closed end and a fourth open end opposite to each other, the second closed end is disposed between the at least one first free end and the first closed end, the fourth open end extends toward the first open end and is in communication with the first open end, and
the receiving seat further comprises a receiving cavity between the second closed end and the fourth open end, and the receiving cavity is configured to receive the aerosol generating product.

In some embodiments, a projection of the receiving seat on the first closed end surrounds a periphery of a projection of the inner conductor unit on the first closed end.
In some embodiments, a projection of the receiving seat on the first closed end is located within a periphery of a projection of the inner conductor unit onto the first closed end.
In some embodiments, a side wall of the receiving seat is provided with at least one slot penetrating through an end surface of the fourth open end and extending towards the second closed end, and the receiving seat is wholly or partially embedded in the at least one first free end via the at least one slot.
In some embodiments, the microwave heating assembly further comprises a microwave feeding unit comprising:

an outer conductor that is tubular and embedded in a side wall of the outer conductor unit and in ohmic contact with the outer conductor unit;
an inner conductor that is linear in shape, disposed in the outer conductor, and extends into the outer conductor unit and is in ohmic contact with the inner conductor unit; and
a dielectric layer disposed between the inner conductor and the outer conductor.

The present invention further provide an aerosol generation device, comprising a microwave generating device, and further comprising the microwave heating assembly of any one of the above; wherein the microwave heating assembly is connected to and in ohmic contact with the microwave generating device.

BENEFICIAL EFFECTS OF THE INVENTION

BENEFICIAL EFFECTS

The implementation of the present invention has the following beneficial effects: the inner conductor unit of the microwave heating assembly of the present invention takes into account the functions of adjusting the microwave field distribution and the resonant frequency, as well as fixing the aerosol generating product, which is beneficial to improving the microwave energy absorption efficiency of the aerosol generating product.

BRIEF DESCRIPTION OF THE DRAWINGS

DESCRIPTION OF THE DRAWINGS

The present invention will be described in even greater detail in conjunction with the accompanying drawings and embodiments, wherein:

FIG. 1 is a schematic diagram of an external structure of a microwave heating assembly in Embodiment 1 of the present invention;
FIG. 2 is a longitudinal sectional schematic structural diagram of the microwave heating assembly shown in FIG. 1;
FIG. 3 is a longitudinal sectional schematic structural diagram of the microwave heating assembly shown in FIG. 1 in a disassembled state;
FIG. 4 is a schematic structural diagram of an inner conductor unit in Embodiment 1 of the present invention;
FIG. 5 is a schematic structural diagram of an inner conductor unit in Embodiment 2 of the present invention;
FIG. 6 is a schematic structural diagram of an inner conductor unit in Embodiment 3 of the present invention;
FIG. 7 is a schematic structural diagram of an inner conductor unit in Embodiment 4 of the present invention;
FIG. 8 is a schematic structural diagram of an inner conductor unit in Embodiment 5 of the present invention;
FIG. 9 is a schematic structural diagram of an inner conductor unit in Embodiment 6 of the present invention;
FIG. 10 is a schematic structural diagram of an inner conductor unit in Embodiment 7 of the present invention;
FIG. 11 is a longitudinal sectional schematic structural diagram of the inner conductor unit shown in FIG. 10;
FIG. 12 is a longitudinal sectional schematic structural diagram of a microwave heating assembly in Embodiment 8 of the present invention;
FIG. 13 is a longitudinal sectional schematic structural diagram of the microwave heating assembly shown in FIG. 12 in a disassembled state;
FIG. 14 is a longitudinal sectional schematic structural diagram of a microwave heating assembly in Embodiment 9 of the present invention;
FIG. 15 is a schematic diagram of the longitudinal structure of the microwave heating assembly shown in FIG. 14 in a disassembled state; and
FIG. 16 is a longitudinal sectional schematic structural diagram of the microwave heating assembly shown in FIG. 15.

Reference numerals: first microwave heating assembly 1; aerosol generating product 2; product end surface 21; first outer conductor unit 11; first inner conductor unit 12; microwave feeding unit 13; cavity 111; conductor side wall 112; first end wall 113; second end wall 114; second air inlet gap 1111; feeding hole 1121; through hole 1131; inner end surface 1141; second protrusion 1142; conductor portion 121; extension portion 122; fixing space 123; first surface 1211; second surface 1212; penetration channel 1213; fixed end 1221; free end 1222; outer conductor 131; inner conductor 132; dielectric layer 133;

second inner conductor unit 12a; third inner conductor unit 12b; fourth inner conductor unit 12c; fifth inner conductor unit 12d; hollow portion 126; sixth inner conductor unit 12e;
seventh inner conductor unit 12f; conductor post 127f; second open end 1271f; third open end 1272f; hollow channel 1273f;
second outer conductor unit 11a; recessed portion 1144; second through hole 1145;
second microwave heating assembly 1a; first receiving seat 14a; probe device 15; second closed end 141a; fourth open end 142a; slot 143a; probe 151.

DETAILED DESCRIPTION

DETAILED DESCRIPTION OF THE INVENTION

In order to have a clearer understanding of the technical features, the objectives, and the effects of the present invention, specific implementations of the present invention will be further described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or position relationships indicated by terms such as "front", "rear", "above", "below", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", and "tail", etc., are based on the orientation or position relationships shown in the accompanying drawings, and are merely used to facilitate describing the technical solutions, rather than indicating or implying that the mentioned device or element should have a particular orientation, and therefore, should not be construed as a limitation to the present.
It should also be noted that, unless otherwise explicitly specified and defined, terms such as "mounted", "connected", "connection", "fixed", and "disposed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated connection; or it may be a mechanical connection or an electrical connection; or it may be a direct connection, or an indirect connection through an intermediate, or an internal communication between two elements or an interaction relationship between two elements. When an element is referred to as being "above" or "below" another element, the element may be "directly" or "indirectly" located above the another element, or there may be one or more intermediates present. The terms "first", "second", "third", etc. are only used to facilitate the description of the present technical solutions, rather than indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For a person skilled in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.
In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures and technologies are provided to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The present invention provides an aerosol generation device, which utilizes microwaves to heat an aerosol generating product 2 (refer to FIG. 3) to generate aerosols, so as to be inhaled by a user. The aerosol generating product 2 may be a solid aerosol generating product 2 such as a treated plant leaf product. It can be understood that the aerosol generating product 2 may also be a liquid aerosol generating product 2.
The aerosol generation device may include a microwave generating device (not illustrated) and a first microwave heating assembly 1 (see FIG. 1). The microwave generating device is configured to generate microwaves, the microwaves can be fed into the first microwave heating assembly 1 to form a microwave field in a cavity 111 therein. An area of strong microwaves in the microwave field serves as a heating area, and acts on part of the aerosol generating product 2 arranged in the heating area.
As shown in FIG. 1, the overall shape of the first microwave heating assembly 1 is roughly cylindrical. Of course, the first microwave heating assembly 1 is not limited to a cylindrical shape, and may also be in other shapes such as a rectangular column, or an elliptical column, etc.
As shown in FIG. 2, the first microwave heating assembly 1 may include a first outer conductor unit 11, a first inner conductor unit 12 disposed in the first outer conductor unit 11, and a medium (for example, air), and further include a microwave feeding unit 13 disposed on the first outer conductor unit 11. The first outer conductor unit 11 defines a cavity 111 as a place for microwave heating. The microwave feeding unit 13 feeds the microwaves generated by the microwave generating device to the first outer conductor unit 11 and the first inner conductor unit 12. The first inner conductor unit 12 adjusts the resonant frequency and the microwave distribution in the cavity 111, thereby achieving microwave heating of the aerosol generating product 2.
As shown in FIG. 2, the first outer conductor unit 11 is cylindrical and defines the cavity 111 that is semi-enclosed and cylindrical. Of course, the cavity 111 is not limited to a cylindrical shape, and may also be in other shapes such as a rectangular column or an elliptical column. Besides, the first outer conductor unit 11 is further provided with a through hole 1131 communicating with the cavity 111. The through hole 1131 may be slightly larger than or equal to the outer diameter of the aerosol generating product 2 so as to allow the aerosol generating product 2 to be inserted into the cavity 111.
In this embodiment, the first outer conductor unit 11 may be integrally made of a conductive metal material, and the metal material is preferably an aluminum alloy or a copper with a high electrical and thermal conductivity. Alternatively, the first outer conductor unit 11 may also be made by coating a first conductive layer on an inner wall of a non-conductive cylinder. The material of the first conductive layer may include gold, silver, copper, aluminum, conductive metal oxides (ITO, AZO, AGZO, FTO, etc.), and conductive polymers, etc., preferably gold or silver. It can be understood that, in order to reduce heat loss during the heating process and solve the heating problem of the first outer conductor unit 11, the manner of coating the inner wall surface of the non-conductive cylinder with the first conductive layer is preferably used to reduce the heat loss caused by the wall current.
As shown in FIG. 3, the first outer conductor unit 11 may include a conductor side wall 112, a first end wall 113 and a second end wall 114 that are electrically conductive. The conductor side wall 112 is cylindrical, and the top end and the bottom end of the conductor side wall 112 are both open structures. The first end wall 113 is configured to cover the top end of the conductor side wall 112. The through hole 1131 axially penetrates the first end wall 113 and is centrally formed on the first end wall 113, thereby forming a first open end of the first outer conductor unit 11. The second end wall 114 is configured to cover the bottom end of the conductor side wall 112 to form a first closed end of the first outer conductor unit 11. It can be understood that, when the aerosol generating product 2 is inserted in the first outer conductor unit 11, an end surface (product end surface 21) of the aerosol generating product 2 adjacent to the second end wall 114 can abut against an end surface (inner end surface 1141) of the second end wall 114 opposite to the first end wall 113, so that the aerosol generating product 2 stands on the inner end surface 1141.
In addition, in order to prevent the product end surface 21 of the aerosol generating product 2 from completely contacting the second end wall 114 to result in a poor air flow, a second air inlet gap 1142 may be formed between the product end surface 21 and the inner end surface 1141. Meanwhile, the second air inlet gap 1142 can also prevent a large amount of heat of the aerosol generating product 2 from being transferred to the first outer conductor unit 11 during the heating process. Optionally, one or more fine first through holes (which may refer to the second through holes 1145 in Embodiment 8) may be provided on the second end wall 114 in an axially penetrating manner, and the first through hole forms the second air inlet gap 1142. Further, at least one second protrusion 1143 and/or at least one second groove (not illustrated) may be provided on the inner end surface 1141. Shapes of the second protrusions 1143 and/or the second grooves (not illustrated) may be the same or different. The second air inlet gap 1142 is formed between the second end wall 114 and the product end surface 21 by means of the second protrusion 1143 and/or the second groove.
In addition, a feeding hole 1121 is provided on the conductor side wall 112 near the first end wall 113 in a radially penetrating manner, and the feeding hole 1121 is configured to allow the microwave feeding unit 13 to be inserted into the first outer conductor unit 11. The bore diameter of the feeding hole 1121 is adapted to the outer diameter of the outer conductor 131 of the microwave feeding unit 13.
As shown in FIG. 3, the first inner conductor unit 12 is arranged in the cavity 111 of the first outer conductor unit 11, and the axial height of the first inner conductor unit 12 is slightly smaller than the axial height of the cavity 111 of the first outer conductor unit 11. The top of the first inner conductor unit 12 is combined with the first outer conductor unit 11 at the peripheral position of the through hole 1131, and the bottom of the first inner conductor unit 12 is suspended in the cavity 111, and a gap exists between the first inner conductor unit 12 and the bottom and the inner peripheral surface of the first outer conductor unit 11. Through the design of the first inner conductor unit 12, the entire first microwave heating assembly 1 can be miniaturized, and the overall height of the cavity 111 can be effectively reduced.
The first inner conductor unit 12 forms a fixing space 123 in the cavity 111. The fixing space 123 is configured to allow the aerosol generating product 2 to pass through when inserted into the first outer conductor unit 11. Meanwhile, the inner wall surface of the fixing space 123 can contact the peripheral surface of the aerosol generating product 2 to prevent the position of the aerosol generating product 2 from shifting, thereby playing a role of fixing the aerosol generating product 2.
Optionally, the first inner conductor unit 12 may be integrally made of a conductive metal material, preferably aluminum alloy or copper. Of course, the first inner conductor unit 12 is not limited to being integrally made of a conductive material, and may also be made by plating a second conductive layer on the outer surface of a non-conductive substrate. The second conductive layer is preferably plated with a silver coating or a gold coating.
As shown in FIG. 4, the first inner conductor unit 12 is a non-fully enclosed structure, which includes a conductor portion 121 and an extension portion 122 integrally combined with the conductor portion 121.
Preferably, the conductor portion 121 is cylindrical, and the inner diameter of the conductor portion 121 is smaller than or equal to the diameter of the through hole 1131 of the first outer conductor unit 11. Further, the inner diameter of the conductor portion 121 is adapted to the diameter of the aerosol generating product 2 to clamp and fix the aerosol generating product 2. The conductor portion 121 includes a first surface 1211 and a second surface 1212 that are opposite to each other and are in an annular shape, and a penetration channel 1213 that passes through the first surface 1211 and the second surface 1212. The first surface 1211 is coaxially combined with the first end wall 113 of the first outer conductor unit 11, and the penetration channel 1213 is in communication with the through hole 1131 of the first outer conductor unit 11. Optionally, the first surface 1211 may be integrally combined with the first outer conductor unit 11, or the first surface 1211 is in ohmic contact with the first outer conductor unit 11.
The extension portion 122 is in an elongated arc-shaped structure, and extends from the second surface 1212 of the conductor portion 121 toward the second end wall 114 of the first outer conductor unit 11 in a direction parallel to the axis of the conductor portion 121. The cross section of the extension portion 122 is arc-shaped, and the inner concave peripheral surface of the extension portion 122 is opposite to the longitudinal axis of the first outer conductor unit 11, and the curvature of the extension portion 122 is adapted to the curvature of the outer peripheral surface of the aerosol generating product 2.
It can be understood that, since the aerosol generating product 2 is generally cylindrical, the extension portion 122 of the present invention is configured as an arc-shaped structure to match the shape of the aerosol generating product 2 to fit the form of the aerosol generating product 2, so that the aerosol generating product 2 can be effectively heated, and the heating uniformity and the heating range of the aerosol generating product 2 can be greatly improved. Of course, the extension portion 122 is not limited to an arc-shaped structure, and it may also be in another structure, such as a linear strip-shaped structure, a curved structure, or the like, or a combination of at least one of an arc-shaped structure, a straight strip-shaped structure, and a curved structure.
In this embodiment, the extension portion 122 includes a fixed end 1221 and a free end 1222. The fixed end 1221 is integrally combined with the second surface 1212 of the conductor portion 121, and the free end 1222 extends in a direction away from the first surface 1211, and there is a small gap between the free end 1222 and the second end wall 114 of the first outer conductor unit 11. Meanwhile, there is also a gap between the outer peripheral surface of the conductor portion 121, the peripheral surface of the extension portion 122, and the inner peripheral surface of the first outer conductor unit 11.
It can be understood that the inner peripheral surface of the conductor portion 121 and the inner concave peripheral surface of the extension portion 122 form the above-mentioned fixing space 123 in the cavity 111. When the aerosol generating product 2 is inserted into the cavity 111, the inner peripheral surface of the conductor portion 121 fits against the outer peripheral surface of the aerosol generating product 2 in the circumferential direction, and meanwhile, the inner concave peripheral surface of the extension portion 122 fits against part of the outer peripheral surface of the aerosol generating product 2 in the axial direction, so as to limit the position of the aerosol generating product 2 and fix the aerosol generating product 2.
In this embodiment, the first inner conductor unit 12 is further provided with an insertion hole (not illustrated) for the insertion of one end of the microwave feeding unit 13. The insertion hole is arranged on the conductor portion 121 or the extension portion 122 along a direction perpendicular to the axial direction of the first outer conductor unit 11, and the opening of the insertion hole is aligned with the feeding hole 1121. The bore diameter of the insertion hole is adapted to the diameter of the one end of the microwave feeding unit 13 inserted therein. Optionally, the shape of the insertion hole may be circular, rectangular, elliptical or other polygonal.
In this embodiment, the first inner conductor unit 12 is configured not only to enable microwave heating of the aerosol generating product 2 and fix the aerosol generating product 2, but also to provide an airflow channel and realize the functions of temperature measurement and temperature control.
Preferably, at least one first protrusion (not illustrated) and/or at least one first groove (not illustrated) is provided on the inner peripheral surface of the conductor portion 121 of the first inner conductor unit 12. The shapes of the first protrusions and/or the first grooves may be the same or different. The inner peripheral surface of the conductor portion 121, via the first protrusions and/or the first grooves, forms the first air inlet gap between itself and the outer peripheral surface of the aerosol generating product 2, so that air can flow into the first outer conductor unit 11 when the aerosol generating product 2 is inhaled.
A receiving hole (not illustrated) for accommodating a temperature measuring element is formed by punching the conductor portion 121 in the vertically direction. The receiving hole passes through the conductor portion 121 and extends to the position of strongest electric field intensity at the bottom of the extension portion 122 (generally, the free end 1222 exhibits the strongest electric field intensity). A temperature sensing probe of the temperature measuring element is inserted into the position where the electric field strength is the strongest to measure and control the temperature of the aerosol generating product 2 during microwave heating. The temperature sensing probe is electrically connected to a temperature control and measuring circuit (not illustrated) located outside the first microwave heating assembly 1. Preferably, the first inner conductor unit 12 is made of a metal material with a high thermal conductivity, and more preferably an aluminum alloy or a copper material with a high electrical and thermal conductivity. Additionally, the inner wall surface of the conductor portion 121 and the inner concave peripheral surface of the extension portion 122 are preferably in close contact with the outer peripheral surface of the aerosol generating product 2, so as to ensure the accuracy of the temperature measurement and control.
It can be understood that, compared to the related art that rely on the probe 151 to achieve temperature measurement and control, the present invention realizes the function of temperature measurement and control by the first inner conductor unit 12, thereby avoiding the problem of needing to clean the probe 151 after the suction is completed, and improving the user experience. Besides, the receiving hole is not an essential technical feature of the first microwave heating assembly 1 but serves as an optional implementation in this embodiment. When the first inner conductor unit 12 is not needed to realize the function of temperature measurement and control, the receiving hole may be omitted. In such cases, the first inner conductor unit 12 may alternatively be fabricated by coating a conductive layer (gold, silver, copper, aluminum, conductive metal oxide (ITO, AZO, AGZO, FTO, etc.), conductive polymer, etc.) on a surface of a high-temperature-resistant non-metallic substrate (e.g., high-temperature-resistant plastic, ceramics, etc.). It should be noted that high temperature resistance refers to the ability to withstand temperatures above 250 °C, and preferably above 350 °C.
As shown in FIG. 3, the microwave feeding unit 13 may be a coaxial connector, and is mounted on the first outer conductor unit 11 via the feeding hole 1121 of the first outer conductor unit 11. The feed coupling method of the microwave feeding unit 13 may be an electric coupling method or a magnetic coupling method, preferably the electric coupling method.
The microwave feeding unit 13 includes an outer conductor 131 which is cylindrical, an inner conductor 132 disposed in the outer conductor 131, and a dielectric layer 133 between the inner conductor 132 and the outer conductor 131. When the microwave feeding unit 13 is mounted in the feeding hole 1121, the inner conductor 132 is in ohmic contact with the first inner conductor unit 12, and the outer conductor 131 is in ohmic contact with the inner wall surface of the feeding hole 1121.
In this embodiment, the outer conductor 131 is tubular, with both ends featuring open structures. The inner conductor 132 is linear in shape and is inserted into the insertion hole of the first inner conductor unit 12 along a direction perpendicular to the axis of the first outer conductor unit 11 to tightly contact with the first inner conductor unit 12 to achieve a reliable ohmic contact.
It can be understood that, in the related art, a receiving seat is generally arranged in the first outer conductor unit 11 to fix the aerosol generating product 2, and the receiving seat is made of a non-metallic material. However, the receiving seat will absorb significant microwave energy during the microwave heating, resulting in a corresponding decrease in the microwave absorption efficiency of the aerosol generating product 2, the carbonization effect thereof becomes poor, and the smoke outlet speed is slowed down.
The first inner conductor unit 12 in Embodiment 1 of the present invention gives consideration to the function of fixing the aerosol generating product 2, so that only the first inner conductor unit 12 can be included in the first outer conductor unit 11, the microwave energy fed into the first microwave heating assembly 1 can basically be absorbed by the aerosol generating product 2, so that the technical problem caused by the receiving seat in the related technology is avoided, the microwave energy absorption efficiency of the aerosol generating product 2 is improved, the overall carbonization effect of the aerosol generating product 2 during the suction is improved, and the power consumption and the cost are reduced.
In this embodiment, when the first microwave heating assembly 1 is equipped with the aerosol-generating product 2, the resonant frequency may be within 2.4-2.5 GHz.
Please refer to FIG. 5, which shows a second inner conductor unit 12a in Embodiment 2 of the present invention. This embodiment is an improvement on the basis of the Embodiment 1. Specifically, the first inner conductor unit 12 of the Embodiment 1 is replaced by the second inner conductor unit 12a. The structure of the second inner conductor unit 12a is substantially the same as that of the first inner conductor unit 12 (wherein the structures of the conductor portion 121 and the extension portion 122 are the same), and the difference between the two is that the second inner conductor unit 12a includes two extension portions 122, and the two extension portions 122 are mirror-symmetrical along the axis of the conductor portion 121 and are evenly spaced along the circumferential direction of the conductor portion 121.
Please refer to FIG. 6, which shows a third inner conductor unit 12b in Embodiment 3 of the present invention. This embodiment is an improvement on the basis of the Embodiment 1. Specifically, the first inner conductor unit 12 of the Embodiment 1 is replaced by the third inner conductor unit 12b. The structure of the third inner conductor unit 12b is substantially the same as that of the first inner conductor unit 12 (wherein the structures of the conductor portion 121 and the extension portion 122 are the same), and the difference between the two is that the third inner conductor unit 12b includes two pairs of extension portions 122, and the two pairs of extension portions 122 are alternately and evenly distributed along the circumferential direction of the conductor portion 121. In the two pairs of extension portions 122, the extension portions 122 in the same pair have equal lengths and are arranged mirror-symmetrically along the axis of the conductor portion 121 on the circumferential direction of the conductor portion 121, while the extension portions 122 in different pairs have unequal lengths.
Please refer to FIG. 7, which shows a fourth inner conductor unit 12c in Embodiment 4 of the present invention. This embodiment is an improvement on the basis of the Embodiment 1. Specifically, the first inner conductor unit 12 of the Embodiment 1 is replaced by the fourth inner conductor unit 12c. The difference between the fourth inner conductor unit 12c and the first inner conductor unit 12 is that the axial length of the conductor portion 121 of the fourth inner conductor unit 12c is greater than the axial length of the conductor portion 121 of the first inner conductor unit 12, and the axial length of the extension portion 122 of the fourth inner conductor unit 12c is less than the axial length of the extension portion 122 of the first inner conductor unit 12. Besides, the fourth inner conductor unit 12c includes four extension portions 122. The four extension portions 122 have the same shape and the same size, and are evenly spaced and distributed in the circumferential direction of the conductor portion 121.
Please refer to FIG. 8, which shows a fifth inner conductor unit 12d in Embodiment 5 of the present invention. This embodiment is an improvement on the basis of the Embodiment 2. Specifically, the second inner conductor unit 12a of the Embodiment 2 is replaced by the fifth inner conductor unit 12d. The fifth inner conductor unit 12d differs from the second conductor structure in that, one of the two extension portions 122 in the fifth inner conductor unit 12d is provided with a hollow portion 126 which is rectangular-shaped. The hollow portion 126 is beneficial to enhancing the local microwave field intensity of the inner conductor unit and improving the heating uniformity of the aerosol generating product 2. It can be understood that the shape of the hollow portion 126 is not limited to a rectangular, and may also include a circular shape, a rectangular shape, a curved shape or other polygonal shapes.
Please refer to FIG. 9, which shows a sixth inner conductor unit 12e in Embodiment 6 of the present invention. This embodiment is an improvement on the basis of the Embodiment 4. Specifically, the fourth inner conductor unit 12c of the Embodiment 4 is replaced by the sixth inner conductor unit 12e. The sixth inner conductor unit 12e differs from the fourth inner conductor unit 12c in that, the conductor portion 121 of the sixth inner conductor unit 12e is provided with a plurality of hollow portions 126 which are rectangular-shaped, and the hollow portions 126 are evenly spaced and distributed in the circumferential direction of the conductor portion 121.
It can be understood that when the number of the extension portions 122 is at least two, the fixing space 123 formed by the inner peripheral surface of the conductor portion 121 and the inner concave peripheral surface of the extension portion 122 can better fix the aerosol generating product 2. Meanwhile, the distribution of the microwave field will be adjusted according to the changes in the length and/or the number of the extension portions 122, and the length and/or the number of the extension portions 122 can be configured according to practical requirements. Besides, when the inner conductor 132 is required to implement the temperature measurement and temperature control function, the receiving hole may be provided in the extension portion 122 having a stronger electric field strength in the inner conductor 132 to improve the accuracy of temperature measurement and temperature control.
Please refer to FIG. 10, which shows a seventh inner conductor unit 12f in Embodiment 7 of the present invention. This embodiment is an improvement on the basis of the Embodiment 1. Specifically, the first inner conductor unit 12 of the Embodiment 1 is replaced by the seventh inner conductor unit 12f. The seventh inner conductor unit 12f differs from the first inner conductor unit 12 in that the seventh inner conductor unit 132 includes a conductor post 127f coaxially disposed in the first outer conductor unit 11. The conductor post 127f is tubular, the outer diameter of the conductor post 127f is smaller than or equal to the bore diameter of the through hole 1131 of the first outer conductor unit 11, and the axial height of the conductor post 127f is slightly smaller than the axial height of the cavity 111 of the first outer conductor unit 11.
In this embodiment, as shown in FIG. 11, the conductor post 127f includes a second open end 1271f and a third open end 1272f that are opposite to each other. The second open end 1271f faces the through hole 1131 of the first outer conductor unit 11, and is coaxially combined with the first end wall 113 of the first outer conductor unit 11. The combined method may be that the second open end 1271f is integrally combined with the first outer conductor unit 11, or the second open end 1271f is in ohmic contact with the first outer conductor unit 11. The third open end 1272f extends towards the direction of the second end wall 114 of the first outer conductor unit 11 and is spaced from the second end wall 114.
A hollow channel 1273f of the conductor post 127f is equivalent to the fixing space 123 mentioned above. The hollow channel 1273f is in communication with the through hole 1131, so that the aerosol generating product 2 can pass through the through hole 1131 and extend into the hollow channel 1273f, thereby limiting the aerosol generating product 2. In addition, the inner diameter of the conductor post 127f is smaller than or equal to the bore diameter of the through hole 1131 of the first outer conductor unit 11, and is adapted to the outer diameter of the aerosol generating product 2, so that the inner peripheral surface of the conductor post 127f fits tightly against the outer peripheral surface of the aerosol generating product 2, so as to clamp and fix the aerosol generating product 2.
Optionally, the conductor post 127f may be integrally made of a conductive metal material, preferably aluminum alloy or copper. Of course, the conductor post 127f is not limited to being integrally made of a conductive material, and it may also be made by plating a second conductive layer on an outer surface of a non-conductive substrate. The second conductive layer is preferably plated with a silver coating or a gold coating.
Please refer to FIG. 12, which shows a second outer conductor unit 11a in Embodiment 8 of the present invention. This embodiment is an improvement on the basis of the Embodiment 2. Specifically, the first outer conductor unit 11 of the Embodiment 1 is replaced by the second outer conductor unit 11a.
As shown in FIG. 13, the second outer conductor unit 11a has a substantially identical structure to the first outer conductor unit 11 of the Embodiment 1, and also includes a conductor side wall 112 which is conductive and straight cylindrical, a first end wall 113 covering the top of the conductor side wall 112, and a second end wall 114 covering the bottom of the conductor side wall 112. Similarly, the conductor side wall 112 of the second outer conductor unit 11a is provided with a feeding hole 1121 near the first end wall 113 in a radially penetrating manner, and a through hole 1131 is provided on the first end wall 113 in a centrally axially penetrating manner.
The second outer conductor unit 11a differs from the first outer conductor unit 11 of the Embodiment 1 in that, a recessed portion 1144 is provided on the end surface (inner end surface 1141) of the second end wall 114 of the second outer conductor unit 11a opposite to the first end wall 113. As shown in FIG. 13, the recessed portion 1144 is a cylindrical channel, which is centrally recessed in the inner end surface 1141 in a direction away from the first end wall 113, and a notch of the recessed portion 1144 is opposite the through hole 1131. The diameter of the recessed portion 1144 may be slightly larger than or equal to the outer diameter of the aerosol generating product 2. When the aerosol generating product 2 sequentially passes through the through hole 1131 and the fixing space 123, the aerosol generating product 2 can be inserted into the recessed portion 1144. The part of the aerosol generating product 2 inserted into the recessed portion 1144 is not easily heated, so that when the aerosol generating product 2 is heated to generate aerosols, the condensate generated on the extension portion 122 of the inner conductor 132 is reduced, thereby further improving the cleanliness of the interior of the second outer conductor unit 11a. In addition, the second end wall 114 is further provided with one or more small second through holes 1145 axially penetrating the bottom of the recessed portion 1144. The function of the second through hole 1145 is the same as that of the first through hole 1142, which will not be repeated herein.
Please refer to FIG. 14, which shows a second microwave heating assembly 1a in Embodiment 9 of the present invention. This embodiment is an improvement on the basis of the Embodiment 2, and the specific difference is that the second microwave heating assembly 1a replaces the technical solution of being supported by the second end wall 114 of the first outer conductor unit 11 in the Embodiment 2 by providing a first receiving seat 14a for supporting the aerosol generating product 2. Meanwhile, the second microwave heating assembly 1a further includes a probe device 15 for measuring and controlling the temperature. It can be understood that the first receiving seat 14a and the probe device 15 can be selected according to practical requirements.
The first receiving seat 14a is made of a material with a low microwave loss, which can reduce the generation of condensate when the aerosol generating product 2 is heated by the extension portion 122 to generate aerosols, thereby further improve the cleanliness of the interior of the cavity 111. Optionally, the material with a low microwave loss may include PI, PEEK, PTFE and the like.
In this embodiment, as shown in FIG. 14, the first receiving seat 14a is mounted at the bottom of the second inner conductor unit 12a, which can cooperate with the two extension portions 122 of the second inner conductor unit 12a to wrap the lower structure of the aerosol generating product 2, and can also play a role in supporting the aerosol generating product 2.
Preferably, as shown in FIG. 15 and FIG. 16, the first receiving seat 14a is substantially cylindrical, and includes a second closed end 141a and a fourth open end 142a. The second closed end 141a is located between the extension portion 122 of the second inner conductor unit 12a and the second end wall 114 of the first outer conductor unit 11, and a gap is provided between the second closed end 141a and the second end wall 114. The fourth open end 142a faces the through hole 1131 of the first outer conductor unit 11. Two slots 143a are provided on the outer peripheral surface of the first receiving seat 14a for the insertion of the extension portions 122 of the second inner conductor unit 12a. The two slots 143a are each in an elongated arc-shaped channel, and are mirror-symmetrical along the axis of the first receiving seat 14a. The two slots 143a respectively penetrate the end surface of the first receiving seat 14a at the open end, and extend towards the second closed end 141a in a direction parallel to the axial direction of the first receiving seat 14a, and there is a gap between the bottom surface of the slot 143a and the second closed end 141a.
When the first receiving seat 14a is mounted at the bottom of the second inner conductor unit 12a, the two extension portions 122 are respectively engaged in the two slots 143a, and the side planar surfaces in the circumferential direction and the bottom surface of the extension portion 122 are attached to the inner wall surfaces of the slots 143a. At this time, the two projections respectively of the first receiving seat 14a and the second inner conductor unit 12a on the second end wall 114 of the first outer conductor unit 11 are partially/completely overlapped. The inner concave wall surfaces of the two extension portions 122 and the inner peripheral surface of the first receiving seat 14a together define a receiving cavity circumferentially and bottom closed. The receiving cavity is configured to accommodate the lower structure of the aerosol generating product 2, and the bottom of the receiving cavity is in contact with the product end surface 21 of the aerosol generating product 2.
It can be understood that, the number, the shape and the size of the slots 143a correspond to the number, the shape and the size of the extension portions 122. Of course, when the first receiving seat 14a needs to be cooperated with the third inner conductor unit 12b in the Embodiment 3, the first receiving seat 14a may be provided with the slot 143a at a position corresponding to a pair of extension portions 122 with a relatively longer length.
In this embodiment, the first receiving seat 14a may further include a number of elongated positioning ribs (not illustrated). The positioning ribs are evenly spaced in the circumferential direction of the inner wall surface of the receiving cavity. Each positioning rib extends along a direction parallel to the axis of the first receiving seat 14a. On one hand, these positioning ribs can be used to clamp the aerosol generating product 2 inserted into the receiving cavity. On the other hand, a first air inlet channel extending longitudinally is formed between every two adjacent positioning ribs to facilitate the ambient air to be sucked into the bottom of the aerosol generating product 2, and then enter the aerosol generating product 2 to take away the aerosols generated by microwave heating.
The first receiving seat 14a may further include a number of elongated supporting ribs (not illustrated). The supporting ribs are evenly spaced and radially distributed on the bottom surface of the receiving cavity. It can be understood that, the supporting ribs can be used to support the aerosol generating product 2 on one hand, and form a number of radial-shaped second air inlet channels on the other hand. The second air inlet channels are respectively in communication with the first air inlet channels to facilitate the ambient air to be sucked into the bottom of the aerosol generating product 2, and then enter the aerosol generating product 2 to take away the aerosols generated by microwave heating.
In this embodiment, the probe device 15 is used to realize the temperature measurement and control functions, so as to improve the response time of the temperature test and the precision of the temperature measurement, prevent the aerosol generating product 2 from being overheated to produce a burnt smell due to too strong microwave field at the bottom end of the extension portion 122 of the second inner conductor unit 12a and untimely temperature control, thereby producing a burnt smell, and further improve the heating uniformity of the aerosol generating product 2. Besides, since the bottom end of the extension portion 122 of the second inner conductor unit 12a has a strong microwave field distribution, the combination of the extension portion 122 and the probe device 15 can prevent the microwave field at the probe device 15 from being too concentrated (too strong), thereby reducing the probability of the aerosol generating product 2 being easily burned or ignited.
As shown in FIG. 16, the probe device 15 includes a probe 151 which is elongated and hollowed and a temperature measuring element (not illustrated) located in the probe 151. The probe 151 is vertically arranged in the first outer conductor unit 11 and is integrally combined with or in ohmic contact with the first outer conductor unit 11. The extension portion 122 of the inner conductor 132 surrounds the outer periphery of the probe 151, and a spacing is maintained between the inner concave wall surface of the extension portion 122 and the outer wall surface of the probe 151. Preferably, one end of the probe 151 is coaxially fixed to the second end wall 114 of the first outer conductor unit 11, and another end of the probe 151 passes through the end wall of the first receiving seat 14a at the second closed end 141a and extends toward the through hole 1131 of the first outer conductor unit 11. The end of the probe 151 extending toward the through hole 1131 extends at most to be flush with the through hole 1131. The diameter of the probe 151 is smaller than the diameter of the aerosol generating product 2. When the aerosol generating product 2 is inserted into the cavity 111, the aerosol generating product 2 is inserted on the probe 151 and is located at the periphery of the probe 151. The temperature measuring element may be electrically connected to a temperature control and measuring circuit (not illustrated) located outside the second microwave heating assembly 1a to monitor and feedback a temperature condition inside the aerosol generating product 2.
Optionally, the shape of the end of the probe 151 extending toward the through hole 1131 includes a planar shape, a spherical shape, an ellipsoidal shape, a conical shape, or a circular truncated cone shape, and preferably, the circular truncated cone shape, since the function of enhancing the local field strength can be achieved, thereby increasing the atomization speed of the aerosol generating medium.
In some embodiments, the probe 151 may be integrally made of a conductive metal material, preferably stainless steel, aluminum alloy or copper. It is understandable that the probe 151 is not limited to being integrally made of a conductive material, and it may also be made by plating a third conductive layer on an outer surface of a non-conductive substrate. The third conductive layer may include gold, silver, copper, aluminum, conductive metal oxide, or conductive polymer. The conductive metal oxide includes ITO, AZO, AGZO, and FTO. Preferably, the third conductive layer is plated with a silver coating or a gold coating.
The present invention further includes a third microwave heating assembly (not illustrated) in Embodiment 10. This embodiment is an improvement on the basis of the Embodiment 9, specifically, the first receiving seat 14a of the Embodiment 9 is replaced by the second receiving seat 14b (not illustrated).
The second receiving seat is mounted at the bottom of the second inner conductor unit 12a to completely wrap the lower structure of the aerosol generating product 2 and support the aerosol generating product 2.
In this embodiment, the second receiving seat is cylindrical, the inner diameter of the second receiving seat is larger than the outer diameter of the conductor portion 121, and the peripheral side wall of the second receiving seat may surround the outer periphery of part/all of the extension portion 122. The second receiving seat may include a third closed end and a fifth open end. The third closed end is adjacent to the second end wall 114 of the first outer conductor unit 11 and has a gap therebetween. The fifth open end faces the through hole 1131 of the first outer conductor unit 11.
When the second receiving seat is mounted at the bottom of the second inner conductor unit 12a, part/all of the extension portion 122 extends in the second receiving seat, and the outer peripheral surface of the portion of the extension portion 122 extending in the second receiving seat and the bottom surface of the extension portion 122 are in close contact with the inner wall surface of the second receiving seat. In this configuration, the projection of the second receiving seat on the second end wall 114 of the first outer conductor unit 11 is located at the periphery of the projection of the second inner conductor unit 12a on the second end wall 114.
The present invention further provides a fourth microwave heating assembly (not illustrated) in Embodiment 11. This embodiment is an improvement on the basis of the Embodiment 9, specifically, the first receiving seat 14a of the Embodiment 9 is replaced by the third receiving seat (not illustrated).
The third receiving seat is mounted at the bottom of the second inner conductor unit 12a and configured to completely wrap the lower structure of the aerosol generating product 2 and support the aerosol generating product 2.
In this embodiment, the third receiving seat is cylindrical, and the outer diameter of the third receiving seat is smaller than the inner diameter of the conductor portion 121, and the third receiving seat may be disposed on the inner periphery of part/all of the extension portion 122. The third receiving seat may include a fourth closed end and a sixth open end. The fourth closed end is adjacent to the second end wall 114 of the first outer conductor unit 11 and has a gap therebetween. The sixth open end is opposite to the through hole 1131 of the first outer conductor unit 11.
When the third receiving seat is mounted at the bottom of the second inner conductor unit 12a, part/all of the extension portion 122 surrounds the outer periphery of the third receiving seat, and the inner concave wall surface of the portion of the extension portion 122 surrounding the third receiving seat is in close contact with the outer peripheral surface of the third receiving seat. The inner wall surface of the fourth closed end is flush with the bottom of the extension portion 122. In this configuration, the projection of the third receiving seat on the second end wall 114 of the first outer conductor unit 11 is located at the periphery of the projection of the second inner conductor unit 12a on the second end wall 114.
It can be understood that the foregoing embodiments only describe the preferred implementations of the present invention, and the descriptions thereof are relatively specific and detailed, but cannot be understood as a limitation to the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, the above technical features can be freely combined without departing from the concept of the present invention, and several modifications and improvements can be made, which all fall within the protection scope of the present invention. Therefore, any equivalent changes and modifications made according to the scope of the claims of the present invention shall fall within the protection scope of the claims of the present invention.

Claims

A microwave heating assembly for an aerosol generation device, comprising:
an outer conductor unit that is tubular and comprises a first open end and a first closed end opposite the first open end; and

an inner conductor unit disposed in the outer conductor unit and defining a fixing space configured for fixing an aerosol generating product,

wherein the inner conductor unit comprises a first fixed end and at least one first free end, the first fixed end is combined with a wall surface at a periphery of the first open end, and the at least one first free end extends in a direction towards the first closed end.
The microwave heating assembly of claim 1, wherein the fixing space penetrates through the inner conductor unit longitudinally.
The microwave heating assembly of claim 1, wherein the first fixed end is integrally combined with the outer conductor unit, or the first fixed end is in ohmic contact with the outer conductor unit.
The microwave heating assembly of claim 1, wherein the inner conductor unit is made of a metallic material, or a surface of the inner conductor unit is coated with a conductive layer.
The microwave heating assembly of claim 1, wherein the inner conductor unit comprises a conductor post that is tubular, and an inner periphery of the conductor post forms the fixing space.
The microwave heating assembly of claim 5, wherein the conductor post is coaxial with the outer conductor unit.
The microwave heating assembly of claim 5, wherein the conductor post is cylindrical, and an inner diameter of the conductor post is equal to or slightly greater than an outer diameter of the aerosol generating product.
The microwave heating assembly of claim 1, wherein the inner conductor unit comprises:
a conductor portion comprising a first surface and a second surface opposite to each other, and a penetration channel penetrating the first surface and the second surface, the first surface being combined with the wall surface at the periphery of the first open end, and the penetration channel being in communication with the first open end; and

at least one extension portion comprising a second fixed end and a second free end, the second fixed end being combined with the second surface, and the second free end extending towards the first closed end,

wherein an inner peripheral wall of the conductor portion and a side wall of the at least one extension portion together define the fixing space.
The microwave heating assembly of claim 8, wherein the conductor portion is cylindrical.
The microwave heating assembly of claim 9, wherein the conductor portion is coaxial with the outer conductor unit.
The microwave heating assembly of claim 9, wherein an inner diameter of the conductor portion is equal to or slightly greater than a diameter of the aerosol generating product.
The microwave heating assembly of claim 8, wherein an inner peripheral surface of the conductor portion is provided with at least one first protrusion and/or at least one first groove configured for forming a first air inlet gap.
The microwave heating assembly of claim 8, wherein the extension portion extends in a direction parallel to an axial direction of the conductor portion.
The microwave heating assembly of claim 8, wherein the extension portion is configured as an elongated arc-shaped structure, a linear strip-shaped structure, a curved structure, or a combination of at least one of the elongated arc-shaped structure, the linear strip-shaped structure, and the curved structure.
The microwave heating assembly of claim 8, wherein the at least one extension portion comprises at least two extension portions evenly spaced in a circumferential direction of the conductor portion.
The microwave heating assembly of claim 8, wherein the at least one extension portion comprises at least two extension portions, the at least two extension portions comprises at least two pairs of extension portions, each pair of extension portions has a length different from another pair of extension portions, and the at least two pairs are alternately and uniformly distributed in a circumferential direction of the conductor portion.
The microwave heating assembly of claim 8, wherein the microwave heating assembly further comprises a temperature measuring assembly configured for measuring a temperature,
wherein the inner conductor unit is provided with a receiving hole for accommodating the temperature measuring assembly, and

wherein the receiving hole extends from the first surface to the second free end of one of the extension portions in a direction parallel to an axial direction of the conductor portion.
The microwave heating assembly of claim 17, wherein a temperature sensing probe of the temperature measuring assembly is disposed at the second free end of one extension portion having the highest electric field intensity of the at least one extension portion.
The microwave heating assembly of claim 8, wherein the inner conductor unit further comprises a hollow portion provided on the conductor portion and/or the at least one extension portion.
The microwave heating assembly of claim 19, wherein a shape of the hollow portion comprises a circular shape, a rectangular shape, or a curved shape.
The microwave heating assembly of claim 1, wherein the first closed end is provided with an inner end surface opposite the first open end,
wherein the inner end surface is configured to abut against a product end surface of the aerosol generating product, and a second air inlet gap is formed between the product end surface and the inner end surface when the product end surface abuts against the inner end surface.
The microwave heating assembly of claim 21, wherein the inner end surface is provided with at least one second protrusion and/or at least one second groove, and the second air inlet gap is formed between the inner end surface and the product end surface via the at least one second protrusion and/or the at least one second groove.
The microwave heating assembly of claim 21, wherein at least one first through hole in communication with the outside is provided penetrating through the first closed end axially, and the second air inlet gap is formed between the inner end surface and the product end surface via the at least one first through hole.
The microwave heating assembly of claim 21, wherein the first closed end is provided with a recessed portion recessed away from the first open end, the recessed portion is opposite to the first open end and having a diameter slightly greater than or equal to a diameter of the aerosol generating product.
The microwave heating assembly of claim 24, wherein at least one second through hole in communication with the outside is provided penetrating through a bottom of the recessed portion axially.
The microwave heating assembly of claim 1, wherein the microwave heating assembly further comprises:
a probe device,

wherein one end of the probe device is combined with an end surface of the first closed end facing the first open end, and another end of the probe device extends towards the first open end, and

wherein the inner conductor unit is disposed on an outer periphery of the probe device and spaced apart from the probe device.
The microwave heating assembly of claim 1, wherein the microwave heating assembly further comprises:
a receiving seat that is tubular and mounted on the inner conductor unit,

wherein the receiving seat comprises a second closed end and a fourth open end opposite to each other, the second closed end is disposed between the at least one first free end and the first closed end, the fourth open end extends toward the first open end and is in communication with the first open end, and

wherein the receiving seat further comprises a receiving cavity between the second closed end and the fourth open end, and the receiving cavity is configured to receive the aerosol generating product.
The microwave heating assembly of claim 27, wherein a projection of the receiving seat on the first closed end surrounds a periphery of a projection of the inner conductor unit on the first closed end.
The microwave heating assembly of claim 27, wherein a projection of the receiving seat on the first closed end is located within a periphery of a projection of the inner conductor unit onto the first closed end.
The microwave heating assembly of claim 27, wherein a side wall of the receiving seat is provided with at least one slot penetrating through an end surface of the fourth open end and extending towards the second closed end, and the receiving seat is wholly or partially embedded in the at least one first free end via the at least one slot.
The microwave heating assembly of claim 1, wherein the microwave heating assembly further comprises:
a microwave feeding unit,

wherein the microwave feeding unit comprises:
an outer conductor that is tubular and embedded in a side wall of the outer conductor unit and in ohmic contact with the outer conductor unit;

an inner conductor that is linear in shape, disposed in the outer conductor, and extends into the outer conductor unit and is in ohmic contact with the inner conductor unit; and

a dielectric layer disposed between the inner conductor and the outer conductor.
An aerosol generation device, comprising:
a microwave generating device, and

the microwave heating assembly of any one of claims 1 to 31;

wherein the microwave heating assembly is connected to and in ohmic contact with the microwave generating device.