Aerosol generating device and microwave heating assembly

Abstract

The invention relates to an aerosol generating device and a microwave heating assembly, the microwave heating assembly comprises an outer conductor, the outer conductor defines a cavity, the cavity has a first end part and a second end part, and the first end part and the second end part are oppositely arranged and located in the assembly direction of an aerosol generating substrate; the inner conductor comprises a first radiation section and a second radiation section which are mounted in the cavity, the first radiation section is lengthwise arranged between the second end part and the first end part, and one end of the first radiation section is connected to the second end part; the second radiation section comprises a fixed end and a free end; the fixed end is connected to one end, facing the first end part, of the first radiation section; the free end extends toward the second end portion. The microwave heating assembly can effectively improve the non-uniformity of the electric field near the single end part of the inner conductor, improve the heating uniformity of the aerosol generating substrate, solve the problem that the aerosol generating substrate is locally burnt, and effectively reduce the height of the inner conductor, so that the aerosol generating device can be miniaturized.

Description

Technical Field

[0001] The invention relates to the field of atomization, and in particular to an aerosol generating device and a microwave heating component. Background Art

[0002] At present, microwave heating technology is applied to aerosol generating devices. Aerosol generating devices using microwave heating technology have the advantages of high heating efficiency and fast aerosol generation. The principle of microwave heating aerosol generating devices is generally designed based on a quarter-wavelength coaxial cavity with an open end of the inner conductor unit. After adding the aerosol generating matrix, the cavity will resonate at the resonant frequency, thereby achieving rapid heating of the aerosol generating matrix.

[0003] The inner conductor of the microwave-heated aerosol generating device is in the shape of a vertical single needle, and the energy is transferred from bottom to top, forming a strong electric field area near the terminal located in the cavity. Due to the antinode point of the terminal standing wave field, the electric field near it is extremely strong, and the electric field decays rapidly away from the terminal, which leads to high medium temperature near the terminal of the inner conductor and low medium temperature away from the terminal. When the aerosol generating matrix away from the terminal is heated to a temperature sufficient for atomization, the medium temperature near the terminal of the inner conductor is too high and burns. In addition, based on the cavity with a quarter-wavelength inner conductor open-circuit coaxial structure, the height of the inner conductor is close to one-quarter of the working wavelength, and the overall cavity is relatively long, which is not conducive to miniaturization. Summary of the invention

[0004] The object of the present invention is to provide a microwave heating component which heats uniformly and can be designed in a miniaturized manner, and further to provide an improved aerosol generating device.

[0005] The technical solution adopted by the present invention to solve the technical problem is: construct an aerosol generating device, comprising:

[0006] An outer conductor is in a cylindrical shape, the outer conductor defines a cavity, the cavity has a first end and a second end, the first end and the second end are arranged opposite to each other and are located in the assembly direction of the aerosol generating substrate;

[0007] The inner conductor includes a first radiating section and a second radiating section installed in the cavity, the first radiating section is longitudinally arranged between the second end and the first end, and one end is connected to the second end; the second radiating section includes a fixed end and a free end; the fixed end is connected to one end of the first radiating section toward the first end; the free end extends toward the second end.

[0008] In some embodiments, the second radiating segment is at least partially disposed parallel to the first radiating segment.

[0009] In some embodiments, the second radiation segment is connected to one end of the first radiation segment facing the first end portion; and the second radiation segment extends in a direction where the second end portion is located.

[0010] In some embodiments, a connecting section is provided between the second radiating section and the first radiating section;

[0011] The connecting section is in a straight line or a curve.

[0012] In some embodiments, the length of the connecting segment is 0.5 mm-2 mm.

[0013] In some embodiments, the length of the second radiation segment is less than or equal to the length of the first radiation segment.

[0014] In some embodiments, the cross-section of the inner conductor is circular or polygonal.

[0015] In some embodiments, the outer conductor is provided with an end wall at the second end, and the inner conductor is in ohmic contact with the end wall or a side wall of the outer conductor.

[0016] In some embodiments, the device further comprises a fixing structure disposed in the cavity, wherein the fixing structure is located between the first end and the second end and has an accommodating cavity formed inside thereof for accommodating at least a portion of the aerosol generating substrate;

[0017] The first radiating section and the second radiating section are arranged outside the fixed structure.

[0018] In some embodiments, a support seat is further included, and the support seat is disposed in the cavity to support the fixed structure;

[0019] The support seat is provided with a through hole, and the inner conductor passes through the through hole.

[0020] An aerosol generating device is also constructed, comprising the microwave heating assembly of the present invention and a microwave feeding structure; the microwave feeding structure is installed on the side wall of the outer conductor and connected to the inner conductor.

[0021] The implementation of the aerosol generating device of the present invention has the following beneficial effects: the microwave heating component is configured by installing a first radiation section and a second radiation section in a cavity on an inner conductor, and longitudinally arranging the first radiation section between the second end and the first end, with one end connected to the second end, and connecting a fixed end of the second radiation section to an end of the first radiation section toward the first end, with a free end extending toward the second end, thereby effectively improving the electric field non-uniformity near a single end of the inner conductor, improving the heating uniformity of the heated aerosol generating substrate, solving the problem of local stickiness of the aerosol generating substrate, and effectively reducing the height of the inner conductor, thereby enabling the aerosol generating device to be miniaturized. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0023] Figure 1 is a schematic diagram of a partial structure of an aerosol generating device in a first embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A partial structural cross-sectional view of the aerosol generating device shown;

[0025] Figure 3 yes Figure 2 A schematic diagram of the inner conductor structure of the aerosol generating device shown;

[0026] Figure 4 yes Figure 1 A comparison diagram of the electric field between the inner conductor of the aerosol generating device shown and the conventional inner conductor;

[0027] Figure 5 yes Figure 1 The inner conductor reflection curve of the aerosol generating device shown is:

[0028] Figure 6 It is the reflection curve of a conventional inner conductor. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "upper", "horizontal", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0030] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] Figure 1 The first embodiment of the aerosol generating device of the present invention is shown. The aerosol generating device can heat the aerosol generating substrate 200 by feeding microwaves to generate aerosol for the user to inhale. The aerosol generating substrate 200 can be detachably arranged in the aerosol generating device. In some embodiments, the aerosol generating substrate 200 is columnar, specifically, the aerosol generating substrate 200 can be cylindrical, and can be a solid material in the form of silk strips, particles or sheets made of leaves, flowers and / or stems of plants, and aroma components can be further added to the solid material.

[0032] like Figure 1 As shown, in this embodiment, the aerosol generating device may include a housing (not shown), a microwave heating component and a microwave generating structure (not shown), wherein the microwave heating component is contained in the housing (not shown) and is used to generate microwave resonance inside the housing after microwaves are connected to form an energy field, thereby heating the aerosol generating substrate 200. The microwave generating structure (not shown) may be connected to the microwave heating component for feeding microwaves.

[0033] like Figures 1 to 3 As shown, in this embodiment, the microwave heating component may include an outer conductor 10 and an inner conductor 20. The outer conductor 10 may define a cavity 11, and the inner conductor 20 may be at least partially installed in the cavity 11, and may be used to feed microwaves into the cavity 11, thereby generating a microwave resonant heating aerosol generating matrix 200.

[0034] In this embodiment, the outer conductor 10 is made of metal material or other highly conductive materials. For example, the outer conductor 10 can be made of gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, stainless steel, etc., or the outer conductor unit includes a base layer made of non-metallic material and a metal coating coated on the inner surface of the base layer. In this embodiment, the outer conductor 10 can be made of aluminum alloy.

[0035] In the present embodiment, the outer conductor 10 is generally cylindrical, and is hollow inside to define a cavity 11. The cavity 11 is a cylindrical cavity, having a first end 11a and a second end 11b, the first end 11a and the second end 11b are arranged opposite to each other and are located in the assembly direction of the aerosol generating substrate. In the present embodiment, an opening 12 is arranged at one end of the outer conductor 10, and an end wall 13 is arranged at the other end, wherein the opening 12 is located at the first end 11a of the cavity 11, and the end wall 13 is arranged opposite to the opening 12, and is correspondingly located at the second end 11b of the cavity 11.

[0036] In this embodiment, the cavity 11 can be divided into a first chamber 111 and a second chamber 112 along its axial direction, and the first chamber 111 and the second chamber 112 are located between the first end 11a and the second end 11b. The first chamber 111 is located on the side with the opening 12, and is used to accommodate the fixed structure 30 for fixing the aerosol generating matrix 200 and the radiation section of the inner conductor 20. The second chamber 112 is located on the side with the end wall 13, and is used to provide an energy coupling structure space. In some embodiments, the cavity 11 is not limited to being divided into two chambers, and can be one chamber, or multiple chambers spliced ​​together. In some other embodiments, the first chamber 111 and the second chamber 112 are not limited to being arranged along the axial direction of the cavity 11, and can also be arranged in a transverse splicing manner.

[0037] In some embodiments, the widest distance of the inner wall of the first chamber 111 may be 13.6 mm. In this embodiment, the cross section of the first chamber 111 is substantially rectangular, and its length may be 13.6 mm. In some embodiments, the height of the first chamber 111 may be 17.8 mm. It is understood that in some other embodiments, the size of the first chamber 111 is not limited to the size values ​​listed above, and the size of the first chamber 111 may be determined according to the radial size of the aerosol generating substrate 200, the length of the medium segment of the aerosol generating substrate 200, etc.

[0038] In this embodiment, the second chamber 112 is independently provided with the first chamber 111, and the second chamber 112 is substantially cylindrical, and its diameter may be 5 mm, and its height may be 9.5 mm. It is understandable that in other embodiments, the shape of the second chamber 112 is not limited to a cylindrical shape, and may be a rectangular parallelepiped or other shapes, and the size of the second chamber 112 is not limited to the size values ​​listed above.

[0039] In this embodiment, the end wall 13 may be provided with a mounting hole 131, and the mounting hole 131 may be inserted by the inner conductor 20, and the inner conductor 20 may be fixed to the mounting hole 131 by interference fit, thereby achieving ohmic contact between the inner conductor 20 and the end wall 13, thereby achieving connection with the outer conductor 10. In some other embodiments, the inner conductor 20 may be in ohmic contact with the side wall of the outer conductor 10, and is not limited to being in ohmic contact with the end wall 13.

[0040] In this embodiment, the inner conductor 20 may be made of a metal material or other highly conductive material. For example, the inner conductor 20 may be made of gold, silver, copper, aluminum, iron, a gold-containing alloy, an aluminum-containing alloy, a copper-containing alloy, an iron-containing alloy, stainless steel, etc., or the inner conductor 20 may include a base layer made of a non-metallic material and a metal coating coated on the outer surface of the base layer. In this embodiment, the inner conductor 20 may be made of stainless steel plated with gold.

[0041] In this embodiment, the inner conductor 20 can be used to transmit microwaves and improve the microwave transmission rate. The microwaves are not easily attenuated when being transmitted in the cavity 11, which improves the effect of the microwaves acting on the aerosol generating matrix 200, so that the microwaves can act on the aerosol generating matrix 200 efficiently and quickly, which is conducive to meeting the user's usage needs.

[0042] In the present embodiment, the cross-section of the inner conductor 20 may be roughly circular, and its diameter may be 1 mm. It is understandable that in some other embodiments, the cross-section of the inner conductor 20 may not be limited to being circular, and may be a polygon, such as a square or a five-deformation or a six-deformation. The inner conductor 20 includes a first radiation section 21, a second radiation section 22, and a connecting section 23 installed in the cavity 11. In the present embodiment, the first radiation section 21, the second radiation section 22, and the connecting section 23 are all one, and are formed by bending the inner conductor 20 once. In some other embodiments, the inner conductor 20 may be bent multiple times to form a plurality of return-bending radiation sections. The first radiation section 21, the connecting section 23, and the second radiation section 22 are sequentially connected to form a radiation unit.

[0043] In this embodiment, the first radiation section 21 can be longitudinally arranged between the second end 11b and the first end 11a, and is partially located in the first chamber 111. Specifically, the first radiation section 21 can be arranged straight, one end of which can be inserted into the mounting hole 131 of the end wall 13 to ohmically contact the end wall 13 to achieve connection with the second end 11b, and the other end can extend toward the opening 12. In some other embodiments, the first radiation section 21 can be arranged in a wave shape or a spiral shape.

[0044] In this embodiment, the second radiation section 22 is located in the first chamber 111 and is arranged longitudinally, and includes a fixed end 22a and a free end 22b, wherein the fixed end 22a can be connected to one end of the first radiation section 21 toward the first end 11a via the connecting section 23, and the free end 22b extends toward the second end 11b. The second radiation section 22 can be arranged straight and can be arranged parallel to the first radiation section 21 as a whole. In this embodiment, the second radiation section 22 can be formed by bending a section of the inner conductor 20 by 180 degrees. In some other embodiments, the second radiation section 22 can be arranged in a wavy or spiral shape. In some other embodiments, the second radiation section 22 can also be partially parallel to the first radiation section 21. Since the end of the inner conductor 20 is the antinode of the standing wave field, the electric field near it is extremely strong. By bending the second radiation section 22 and the first radiation section 21, the inner conductor 20 can have at least two ends in the part located in the first chamber 111, thereby effectively improving the electric field non-uniformity near the single end of the inner conductor 20 in the cavity 11, improving the heating uniformity of the heated aerosol generating matrix 200, and solving the problem of local sticking of the aerosol generating matrix 200. At the same time, the height of the inner conductor 20 can be effectively reduced through the bending setting, thereby allowing the aerosol generating device to be miniaturized.

[0045] In this embodiment, the length of the second radiation section 22 may be less than the length of the first radiation section 21. Specifically, the length of the first radiation section 21 may be 21 mm, and the length of the second radiation section 22 may be 9 mm. Compared with the length of 30 mm of the quarter-wavelength inner conductor 20 in the related art, the length of 21 mm in this embodiment significantly reduces the height of the inner conductor 20. In some other embodiments, the length of the second radiation section 22 may also be substantially equal to the length of the first radiation section 21. The interval between the first radiation section 21 and the second radiation section 22 may be 1 mm. It can be understood that in some other embodiments, the interval between the first radiation section 21 and the second radiation section 22 is not limited to 1 mm.

[0046] In this embodiment, the two ends of the connecting section 23 can be connected to the first radiation section 21 and the second radiation section 22 respectively, and the connecting section 23 is curved. In some other embodiments, the connecting section 23 can be straight, and it can form a first set angle with the first radiation section 21, and the first set angle is greater than 0 degrees and less than 180 degrees. In some embodiments, the first set angle can be 90 degrees. The connecting section 23 can form a second set angle with the second radiation section 22, and the second set angle is greater than 0 degrees and less than 180 degrees. In some embodiments, the second set angle can be 90 degrees. In some embodiments, the length of the connecting section 23 can be selected to be 0.5mm-2mm (including the end values ​​0.5mm and 2mm); if the length of the connecting section 23 is less than 0.5mm, the connecting section 23 is too short, and the first radiation section 21 and the second radiation section 22 are easy to touch each other, thereby affecting the radiation performance. If the length of the connecting section 23 is greater than 2 mm, the connecting section 23 is too long, which may easily make the size of the cavity 11 too large, and is not conducive to the miniaturization design of the cavity 11 .

[0047] In this embodiment, the aerosol generating device further comprises a fixing structure 30, which is arranged in the cavity 11 and used to fix the aerosol generating substrate 200, so as to ensure that the relative position of the aerosol generating substrate 200 and the inner conductor 20 is not inconvenient during heating, thereby ensuring the consistency and stability of heating, and at the same time, it can effectively prevent the condensation formed by the condensation of the aerosol generating substrate 200 from leaking to the inner conductor 20, resulting in heating failure, and it is also convenient for users to clean up the oil stains caused by the protection suction. In some embodiments, the fixing structure 30 is located between the first end 11a and the second end 11b, and is specifically installed in the first chamber 111, and the first radiation section 21 and the second radiation section 22 are both installed on the outside of the fixing structure 30. The fixing structure 30 can be cylindrical, and is a hollow structure with a plug-in port 32 at one end. A receiving cavity 31 is formed inside the fixing structure 30, and the receiving cavity 31 can be used to accommodate at least part of the aerosol generating substrate 200, and specifically, it can accommodate part of the aerosol generating substrate 200.

[0048] In some embodiments, the fixed structure 30 may be made of a lossless or low-loss dielectric material. For example, the fixed structure 30 is made of Teflon, PEEK, quartz, alumina ceramics, various composite wave-transmitting materials, etc. Specifically, in this embodiment, the fixed structure 30 is made of Teflon, and its cross section may be roughly circular, and the inner diameter may be 7.2 mm. In some other embodiments, the cross section of the fixed structure 30 is not limited to a circle, and may be a square or other shapes.

[0049] In this embodiment, the aerosol generating device further comprises a support seat 40, which is arranged in the cavity 11, and can separate the cavity 11 into a first chamber 111 and a second chamber 112, and can be used to support the fixed structure 30, ensure the accuracy of the heating position, and can isolate the heat from being transferred outward, thereby improving the heating stability and efficiency. In this embodiment, a positioning groove 41 is arranged on the support seat 40, and the fixed structure 30 is inserted into the positioning groove 41, and can be interference fit with the positioning groove 41. A through hole 42 is arranged on the support seat 40, and the first radiation section 21 of the inner conductor 20 can be passed from the second chamber 112 to the first chamber 111 through the through hole 42. In some embodiments, the support seat 40 can be made of a lossless or low-loss dielectric material. For example, the support seat 40 is made of Teflon, PEEK, quartz, alumina ceramics, various composite wave-transmitting materials, etc., or the support seat 40 includes a metal material, or includes a non-metallic material substrate layer and a metal coating coated on the substrate layer made of non-metallic material.

[0050] In this embodiment, the aerosol generating device further includes a microwave feeding structure 50, which is installed on the side wall of the outer conductor 10. Specifically, the microwave feeding structure 50 is embedded and installed on the side wall corresponding to the outer conductor 10 and the second chamber 112. The microwave feeding structure 50 can be connected to the inner conductor 20. Specifically, the microwave feeding structure 50 has a feeding needle 51 extending into the second chamber 112, and one end of the feeding needle 51 can abut against the outer wall of the inner conductor 20, thereby coupling with the inner conductor 20. The microwave generating structure is used to feed the microwave generated by the microwave generating structure into the first chamber 111 through the inner conductor 20, and at the same time can isolate the external circuit from the cavity 11, so as to prevent the microwave from leaking to the external circuit and causing the external circuit to fail. In some embodiments, the microwave feeding structure 50 can be composed of a standard or non-standard radio frequency connector, which is embedded in the side wall of the outer conductor 10 through a thread or a flange.

[0051] The specific working principle and theoretical basis of this embodiment are as follows:

[0052] The microwave energy of the aerosol generating device can be generated by a microwave generating structure and enter the cavity 11 through a microwave feeding structure 50. When the height of the inner conductor 20 is close to one quarter of the working wavelength, the microwave is reflected and superimposed at the end of the inner conductor 20 to form a standing wave field, which quickly heats the aerosol generating matrix 200, thereby generating an aerosol.

[0053] Due to the skin effect, high-frequency current flows through the surface of the inner conductor 20, and metal materials or other highly conductive materials can improve microwave transmission efficiency. Compared with conventional conduction heating, the body heating mode of microwave heating can better meet the user's "zero waiting" needs, and you can enjoy the fun of atomization almost without waiting.

[0054] The principle of microwave resonance is that phase superposition forms a standing wave field. The end of the inner conductor 20 of the quarter-wavelength coaxial cavity 11 is the antinode point of the standing wave field. Therefore, the electric field at the end of the inner conductor 20 is extremely strong, and the nearby medium is very likely to be overheated and burnt.

[0055] The design of the bent inner conductor 20 has two major benefits:

[0056] (1) Effectively improve the uniformity of the longitudinal electric field and avoid local burning of the dielectric;

[0057] (2) At the same time, the height of the inner conductor 20 at the resonant frequency can be effectively reduced, thereby reducing the volume of the cavity 11.

[0058] The theoretical basis for improving the uniformity of the longitudinal electric field is: Figure 4 It can be seen that when the open end of the inner conductor 20 is bent toward the second end 11b of the cavity 11, a strong field region can be formed on the side close to the support seat 40. At the same time, the magnetic field at the bending point is enhanced, and the current density on the surface of the inner conductor 20 is increased, forming another strong field region at the bending point, so that the lower part of the dielectric segment of the aerosol generating matrix 200, which is difficult to heat, can be heated to the atomization temperature at the same time as the upper part, thereby improving the uniformity of heating.

[0059] The theoretical basis for reducing the height of the inner conductor 20 is:

[0060] For a microwave resonant circuit, the resonant frequency f 0 It can be defined as:

[0061]

[0062] The folded structure is equivalent to a series parasitic inductance, so when the resonant circuit L increases, f 0 reduce,

[0063] For the wavelength λ of electromagnetic waves, we have:

[0064]

[0065] The wavelength of electromagnetic waves is inversely proportional to the frequency. In order to ensure that the resonant frequency remains unchanged at 2.45GHz, the operating wavelength λ is reduced accordingly.

[0066] Therefore, the height of the inner conductor 20 of the open coaxial cavity 11 based on the quarter-wavelength inner conductor 20 becomes shorter.

[0067] Depend on Figure 5 and Figure 6 As shown in Table 1, (1) the conventional inner conductor 20 is difficult to heat the lower part of the dielectric section of the aerosol generating substrate 200, while the bent inner conductor 20 of the present invention can take into account both the upper and lower parts of the dielectric section of the aerosol generating substrate 200;

[0068] (2) The meandering inner conductor 20 can also achieve the same reflection coefficient as the vertical inner conductor 20, and the energy utilization rate is not reduced;

[0069] (3) The meandering inner conductor 20 can reduce the peak-to-average ratio of the electric field in the main heating sector, thereby improving the uniformity of the longitudinal electric field.

[0070] Table 1 Comparison of numerical simulations of the electric field in the main heating sector

[0071]

[0072]

[0073] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A microwave heating component, characterized in that, it includes: An outer conductor (10), which is cylindrical. The outer conductor (10) defines a cavity (11). The cavity (11) has a first end (11a) and a second end (11b). The first end (11a) and the second end (11b) are oppositely arranged and are located in the assembly direction of the aerosol generation matrix (200); An inner conductor (20), which includes a first radiation section (21) and a second radiation section (22) installed in the cavity (11). The first radiation section (21) is longitudinally arranged between the second end (11b) and the first end (11a), and one end is connected to the second end (11b); The second radiation section (22) includes a fixed end (22a) and a free end (22b); The fixed end (22a) is connected to one end of the first radiation section (21) facing the first end (11a); The free end (22b) extends towards the second end (11b).

2. The microwave heating component according to claim 1, characterized in that, at least part of the second radiation section (22) is arranged parallel to the first radiation section (21).

3. The microwave heating component according to claim 1, characterized in that, a connection section (23) is arranged between the second radiation section (22) and the first radiation section (21); The connection section (23) is linear or curved.

4. The microwave heating component according to claim 1, characterized in that, the length of the connection section (23) is 0.5 mm - 2 mm.

5. The microwave heating component according to claim 1, characterized in that, the length of the second radiation section (22) is less than or equal to the length of the first radiation section (21).

6. The microwave heating component according to claim 1, characterized in that, the cross-section of the inner conductor (20) is circular or polygonal.

7. The microwave heating component according to claim 1, characterized in that, the outer conductor (10) is provided with an end wall (13) at the second end (11b), and the inner conductor (20) is in ohmic contact with the end wall (13) or the side wall of the outer conductor (10).

8. The microwave heating component according to claim 1, characterized in that, it further includes a fixing structure (30) arranged in the cavity (11). The fixing structure (30) is located between the first end (11a) and the second end (11b), and an accommodation cavity (31) for accommodating at least part of the aerosol generation matrix (200) is formed inside; The first radiation section (21) and the second radiation section (22) are arranged outside the fixing structure (30).

9. The microwave heating component according to claim 8, characterized in that, it further includes a support seat (40). The support seat (40) is arranged in the cavity (11) to support the fixing structure (30); The support seat (40) is provided with a through hole (42), and the inner conductor (20) passes through the through hole (42).

10. An aerosol generating device, characterized in that, it comprises the microwave heating component described in any one of claims 1 to 9 and a microwave feeding structure (50); the microwave feeding structure (50) is installed on the side wall of the outer conductor (10) and is connected to the inner conductor (20).

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