Microwave heating assembly and aerosol-generating device

Abstract

Disclosed in the present application are a microwave heating assembly and an aerosol-generating device. The microwave heating assembly comprises an outer conductor unit, a first inner conductor unit and a second inner conductor unit, wherein the outer conductor unit defines a cavity for accommodating an aerosol-generating substrate; and when the aerosol-generating substrate is placed in the cavity, a hollow region is defined, the first inner conductor unit is at least partially arranged in the hollow region, and the second inner conductor unit is at least partially arranged on the side of the aerosol-generating substrate away from the hollow region. Therefore, when the aerosol-generating substrate is placed in the cavity, the first inner conductor unit and the second inner conductor unit in the cavity can collaborate in the heating of the same aerosol-generating substrate, thereby meeting the user requirements for a greater number of vaping; besides, the first inner conductor unit and the second inner conductor unit respectively perform heating on the inner side and the outer side of the aerosol-generating substrate, thereby having relatively good heating uniformity.

Description

Microwave heating components and aerosol generating devices Technical Field

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

[0002] Heated tobacco products typically operate at temperatures between 50 and 350°C. Compared to regular cigarettes, heated tobacco products retain the traditional flavor while significantly reducing the release of harmful substances from tobacco. One heating method is microwave heating, which offers advantages such as high heating efficiency and rapid aerosol generation. Existing microwave-heated aerosol generating devices usually consist of an outer conductor unit and an inner conductor unit located within the outer conductor unit. Because they only have one outer and one inner conductor unit, existing aerosol generating devices have a drawback: using the same aerosol generating substrate, they can only achieve a maximum of 15-20 puffs per user. For users requiring more puffs, frequent replacement of the aerosol generating substrate is necessary, resulting in inconvenience. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a microwave heating component and an aerosol generating device, which addresses at least one deficiency of the prior art.

[0004] The technical solution adopted by this application to solve its technical problem is: to provide a microwave heating component, which includes an outer conductor unit, a first inner conductor unit, and a second inner conductor unit;

[0005] The outer conductor unit defines a cavity for accommodating the aerosol generating matrix; when the aerosol generating matrix is ​​placed in the cavity, it defines a hollow region, the first inner conductor unit is at least partially disposed within the hollow region, and the second inner conductor unit is at least partially disposed on the side of the aerosol generating matrix away from the hollow region.

[0006] In some embodiments, the microwave heating assembly further includes a hollow mounting base disposed within the cavity for accommodating the aerosol generation matrix, wherein a gap is formed between the first inner conductor unit and the inner wall surface of the mounting base.

[0007] In some embodiments, the second inner conductor unit is at least partially disposed within the mounting base.

[0008] In some embodiments, the mounting base includes a hollow cylindrical body, the sidewall of which is formed with an outwardly protruding arcuate boss located on the side of the aerosol generating matrix away from the hollow region, for accommodating the second inner conductor unit.

[0009] In some embodiments, the hollow region includes a symmetrically distributed first sub-region and a second sub-region, wherein any position in the first sub-region is closer to the second inner conductor unit than any position in the second sub-region; the first inner conductor unit is at least partially disposed within the second sub-region.

[0010] In some embodiments, the second sub-region includes a third sub-region disposed along the inner periphery of the aerosol generating matrix, wherein the first inner conductor unit is at least partially disposed within the third sub-region.

[0011] In some embodiments, along the cross-sectional direction of the microwave heating assembly, the center line connecting the portion of the first inner conductor unit disposed in the hollow region and the second inner conductor unit intersects the longitudinal axis of the aerosol generating matrix.

[0012] In some embodiments, either the first inner conductor unit or the second inner conductor unit has a bend.

[0013] In some embodiments, the first inner conductor unit includes a first probe segment and a first impedance matching segment connected together, and the second inner conductor unit includes a second probe segment and a second impedance matching segment connected together; the first probe segment is at least partially located within the hollow region, and the second probe segment is at least partially disposed on the side of the aerosol generating matrix away from the hollow region; either the first impedance matching segment or the second impedance matching segment has the bent portion.

[0014] This application also provides an aerosol generating device, which includes a microwave generating unit and a microwave heating assembly as described in any of the above claims. The microwave heating assembly further includes a microwave feeding unit connected between the outer conductor unit and the microwave generating unit, wherein the microwave feeding unit feeds the microwaves generated by the microwave generating unit into the cavity.

[0015] This application has at least the following beneficial effects: the first inner conductor unit is at least partially disposed within the hollow region defined by the aerosol generating matrix, and the second inner conductor unit is at least partially disposed on the side of the aerosol generating matrix away from the hollow region. Thus, when the aerosol generating matrix is ​​placed in the cavity, the first inner conductor unit and the second inner conductor unit in the cavity can jointly participate in the heating of the same aerosol generating matrix, meeting the user's need for higher suction counts; and the first inner conductor unit and the second inner conductor unit are heated on the inner and outer sides of the aerosol generating matrix respectively, resulting in better heating consistency. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0017] Figure 1 is a three-dimensional structural schematic diagram of a microwave heating assembly according to some embodiments of this application;

[0018] Figure 2 is a top view of the microwave heating assembly shown in Figure 1;

[0019] Figure 3 is a schematic diagram of the vertical cross-sectional structure of the microwave heating assembly shown in Figure 2 along the AA direction;

[0020] Figure 4 is a schematic diagram of the vertical cross-sectional structure of the microwave heating assembly shown in Figure 2 along the BB direction.

[0021] Figure 5 is a schematic diagram of the vertical cross-sectional structure of the microwave heating assembly shown in Figure 2 along the CC direction.

[0022] Figure 6 is a schematic diagram of the structure of the microwave heating component shown in Figure 2 after removing the aerosol and generating the matrix.

[0023] Figure 7 is a schematic diagram of the loss distribution of the second inner conductor unit of the microwave heating assembly shown in Figure 1;

[0024] Figure 8 is a schematic diagram of the loss distribution of the first inner conductor unit of the microwave heating assembly shown in Figure 1.

[0025] Figure 9 is an exploded structural diagram of the microwave heating assembly shown in Figure 1;

[0026] Figure 10 is a further exploded structural diagram of the microwave heating assembly shown in Figure 9;

[0027] Figure 11 is a reflection coefficient diagram of the microwave heating assembly shown in Figure 2;

[0028] Figure 12 is a three-dimensional structural diagram of the mounting base of the microwave heating assembly shown in Figure 10;

[0029] Figure 13 is a top view of a microwave heating assembly (the mounting base only defines the receiving area) of some other embodiments;

[0030] Figure 14 is a top view of a microwave heating assembly of some other embodiments (the mounting base only defines a first region of the receiving area and the non-receiving area);

[0031] Figure 15 is a top view of a microwave heating assembly of some other embodiments (the mounting base only defines a second region, which is neither the receiving area nor the non-receiving area). Detailed Implementation

[0032] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0033] Referring to Figure 1, the aerosol generating device provided in this application includes a microwave generating unit (not shown) and a microwave heating component 1. The microwave heating component 1 can use microwaves to heat the aerosol generating matrix 2 to atomize and generate aerosols for inhalation by a user. In some embodiments, the aerosol generating matrix 2 is a solid aerosol generating matrix 2, such as a treated plant leaf product. It is understood that in other embodiments, the aerosol generating matrix 2 may also be a liquid aerosol generating matrix 2.

[0034] As shown in Figures 1 and 3, the microwave heating assembly 1 in some embodiments of this application includes an outer conductor unit 3, a first inner conductor unit 4, a second inner conductor unit 5, and a microwave feed unit 6 connected between the outer conductor unit 3 and the microwave generating unit. The outer conductor unit 3 defines a cavity 30. When the aerosol generating device is in use, the aerosol generating matrix 2 is inserted into the cavity 30 of the outer conductor unit 3. The microwave feed unit 6 feeds the microwaves generated by the microwave generating unit into the cavity 30. The fed microwaves can continuously oscillate within the cavity 30. The aerosol generating matrix 2 is exposed to the microwave field within the cavity 30 and is heated and atomized by the microwaves to generate aerosols for the user to inhale. At the same time, the microwave feed unit 6 can also be used to isolate the external circuit from the cavity 30, preventing microwave leakage to the external circuit and causing circuit failure.

[0035] Specifically, in the embodiments shown in Figures 1 to 5, the outer conductor unit 3 is generally a square tube with one end open and the other closed. However, the outer conductor unit 3 is not limited to this shape and can also be cylindrical or other shapes. In the embodiments shown in Figures 9 and 10, the outer conductor unit 3 has two feed holes 34 penetrating the sidewall. These feed holes 34 communicate with the cavity 30, and the microwave feed unit 6 is connected to the inner conductor unit through these feed holes 34. The microwave feed unit 6 can be a coaxial connector. The microwave feed unit 6 is connected to the microwave generating unit and feeds the microwaves generated by the microwave generating unit into the cavity 30.

[0036] The outer conductor unit 3 can be made of a metallic material or other highly conductive material. For example, the outer conductor unit 3 may include one or more of the following: gold, silver, copper, aluminum, iron, gold-containing alloys, aluminum-containing alloys, copper-containing alloys, iron-containing alloys, and stainless steel. Alternatively, the outer conductor unit 3 may also include a non-metallic body and a metallic coating disposed on the outer layer of the non-metallic body. The inner conductor unit can be made of a metallic material or other highly conductive material. Alternatively, the inner conductor unit may also include a non-metallic material and a metallic coating.

[0037] When the aerosol generating matrix 2 is placed within the cavity 30, a hollow region 3021 is defined. The first inner conductor unit 4 is at least partially disposed within the hollow region 3021, and the second inner conductor unit 5 is at least partially disposed on the side of the aerosol generating matrix 2 away from the hollow region 3021. That is, the first inner conductor unit 4 may be partially or entirely disposed within the hollow region 3021; ​​the second inner conductor unit 5 may be partially or entirely disposed on the side of the aerosol generating matrix 2 away from the hollow region 3021. The aerosol generating matrix 2 may have an annular longitudinal structure, with its inner wall defining the hollow region 3021. The first inner conductor unit 4 is at least partially located on the inner side of the aerosol generating matrix 2, and the second inner conductor unit 5 is at least partially located on the outer side of the aerosol generating matrix 2. Therefore, when the aerosol generating matrix 2 is placed in the cavity 30, the first inner conductor unit 4 and the second inner conductor unit 5 within the cavity 30 can jointly participate in heating the same aerosol generating matrix 2, improving heating efficiency and thus meeting the user's need for higher suction counts. Furthermore, the first inner conductor unit 4 and the second inner conductor unit 5 heat the inner and outer sides of the aerosol generating matrix 2 respectively, resulting in good heating consistency. Specifically, as shown in Figures 1 to 3, the cavity 30 includes a receiving area 301 and a non-receiving area 302. The receiving area 301 is used to receive the aerosol generating matrix 2. In the embodiment shown in Figure 3, the receiving area 301 has a longitudinal axis y, and the aerosol generating matrix 2 is loaded into the receiving area 301 along this longitudinal axis y. The receiving area 301 also has a transverse direction intersecting the longitudinal axis y. The transverse direction (or cross-sectional direction) of the receiving area 301 is perpendicular to the longitudinal axis y. The term "longitudinal" as used below can refer to the extension direction of the longitudinal axis y. The term "transverse" (or "cross-sectional direction") used below can be referred to as the direction perpendicular to the longitudinal axis y.

[0038] The volume of the accommodating region 301 is equal to the solid volume of the aerosol generating matrix 2 contained in the cavity 30. Viewed in cross-section, the outer contour of the accommodating region 301 can coincide with the outer contour of the aerosol generating matrix 2 contained in the cavity 30 (the contour with the largest enclosed area). In the embodiments shown in Figures 1 to 3, the aerosol generating matrix 2 is annular, and the corresponding accommodating region 301 is also annular.

[0039] As shown in Figures 1 to 6, the non-accommodating region 302 includes a hollow region 3021 located inside the accommodating region 301 and a first region 3022 located outside the accommodating region 301. The hollow region 3021 is closer to the longitudinal axis y of the accommodating region 301 than the first region 3022. Both the first inner conductor unit 4 and the second inner conductor unit 5 are disposed within the non-accommodating region 302. The first inner conductor unit 4 is at least partially located within the hollow region 3021, and the second inner conductor unit 5 is at least partially located within the first region 3022. The second inner conductor unit 5 may be partially or entirely located within the first region 3022.

[0040] Specifically, in the embodiments shown in Figures 4 and 5, the first inner conductor unit 4 includes a first probe segment 41 and a first impedance matching segment 42 connected together, and the second inner conductor unit 5 includes a second probe segment 51 and a second impedance matching segment 52 connected together. The probe segment is used to form a microwave field, and the impedance matching segment is used to achieve impedance matching between the microwave feed unit 6 and the cavity 30. It should be noted that impedance matching means that the characteristic impedance of the transmission line is equal in magnitude and phase to the load impedance, at which point the energy on the transmission line is transmitted to the load with almost no reflection. The first probe segment 41 is closer to the hollow region 3021 than the first impedance matching segment 42, that is, closer to the aerosol generation matrix 2 placed in the accommodating region 301; the second probe segment 51 is closer to the accommodating region 301 than the second impedance matching segment 52, that is, closer to the aerosol generation matrix 2 placed in the accommodating region 301. The end of the first impedance matching section 42 furthest from the first probe section 41 is fixedly connected to the outer conductor unit 3, specifically to the bottom surface of the cavity 30; the end of the second impedance matching section 52 furthest from the second probe section 51 is also fixedly connected to the outer conductor unit 3, specifically to the bottom surface of the cavity 30.

[0041] The first probe segment 41 is at least partially disposed within the hollow region 3021, that is, on the inner side of the aerosol generating matrix 2. The second probe segment 51 is at least partially disposed on the side of the aerosol generating matrix 2 away from the hollow region 3021, that is, on the outer side of the aerosol generating matrix 2. That is, the first probe segment 41 may extend partially into the hollow region 3021 or may be entirely located within the hollow region 3021; ​​similarly, the second probe segment 51 may be partially or entirely located on the side of the aerosol generating matrix 2 away from the hollow region 3021.

[0042] Specifically, the second probe segment 51 is at least partially located within the first region 3022. Thus, the first probe segment 41 and the second probe segment 51 are respectively disposed on the inner and outer sides of the accommodating region 301, that is, the first probe segment 41 and the second probe segment 51 are respectively disposed on the inner and outer sides of the aerosol generating matrix 2 within the accommodating region 301, resulting in better heating consistency.

[0043] Specifically, in the embodiments shown in Figures 3 to 5, the non-accommodating region 302 further includes a second region 3023. This second region 3023 is located below the accommodating region 301 and serves to provide energy coupling space. The first impedance matching segment 42 and the second impedance matching segment 52 are both disposed within this second region 3023.

[0044] As shown in Figure 6, in some embodiments, the hollow region 3021 includes a symmetrically distributed first sub-region 31 and a second sub-region 32, with any position in the first sub-region 31 being closer to the second inner conductor unit 5 than any position in the second sub-region 32. The first inner conductor unit 4 is at least partially disposed within the second sub-region 32. For example, the first probe segment 41 of the first inner conductor unit 4 can be disposed within the second sub-region 32. This arrangement allows the first probe segment 41 of the first inner conductor unit 4 and the second probe segment 51 of the second inner conductor unit 5 to be decoupled (i.e., they do not affect each other or the degree of mutual influence is very low), thereby enabling independent heating of the two inner conductor units, resulting in better consistency in the loss distribution of the two inner conductor units and thus better heating consistency.

[0045] In the embodiment shown in Figure 6, the cross-sectional profile of the accommodating region 301 is generally annular, which is adapted to the annular cross-sectional profile of the aerosol generating matrix 2. The hollow region 3021 is defined by the inner wall surface of the annular aerosol generating matrix 2 disposed within the accommodating region 301. The cross-sectional profiles of the first sub-region 31 and the second sub-region 32 are semi-circular, respectively. In other embodiments, the cross-sectional profiles of the accommodating region 301 and the hollow region 3021 can be changed accordingly depending on the shape of the aerosol generating matrix 2.

[0046] Please refer to Figures 7 and 8. Figure 7 is a simulation diagram of the loss distribution of the second probe segment 51 of the second inner conductor unit 5, and Figure 8 is a simulation diagram of the loss distribution of the first probe segment 41 of the first inner conductor unit 4. The first inner conductor unit 4 is at least partially disposed in the second sub-region 32. Based on the loss distribution simulation of the first probe segment 41 and the second probe segment 51, the absorption power of the aerosol generating matrix 2 near the first probe segment 41 is approximately equal to that near the second probe segment 51, which is more conducive to the heating consistency of the aerosol generating matrix 2.

[0047] As shown in the embodiment of FIG6, the second sub-region 32 includes a third sub-region 323 and a fourth sub-region 324. The third sub-region 323 is disposed along the inner edge of the accommodating region 301, that is, along the inner periphery of the aerosol generating matrix 2. The first inner conductor unit 4 is at least partially disposed in the third sub-region 323. The fourth sub-region 324 is closer to the longitudinal axis y of the accommodating region 301 than the third sub-region 323. In the embodiment shown in FIG6, the cross-sectional profile of the inner wall surface of the aerosol generating matrix 2 is arc-shaped, therefore the third sub-region 323 is an arc-shaped strip region, while the fourth sub-region 324 is a fan-shaped region. The first probe segment 41 of the first inner conductor unit 4 is disposed at any position in the third sub-region 323. The multiple circles shown in dashed lines in FIG6 represent six other exemplary positions of the first probe segment 41 of the first inner conductor unit 4 in the third sub-region 323. This arrangement allows the first probe segment 41 of the first inner conductor unit 4 in the second sub-region 32 to be positioned as close as possible to the aerosol generation matrix 2, thereby achieving a better heating effect.

[0048] As shown in Figure 6, in some embodiments, along the cross-sectional direction of the microwave heating assembly, the portion of the first inner conductor unit 4 disposed within the second sub-region 32 intersects the center line x between the first inner conductor unit 4 and the second inner conductor unit 5 at the longitudinal axis y of the accommodating region 301 (corresponding to the longitudinal axis y of the aerosol generating matrix 2). Specifically, this means that when the aerosol generating matrix 2 is placed within the cavity 30, the center line x intersects the longitudinal axis y. More specifically, the center line x between the first probe segment 41 of the first inner conductor unit 4 and the second probe segment 51 of the second inner conductor unit 5 may intersect at this longitudinal axis y. More precisely, the center line x intersects the longitudinal axis y. Referring to Figures 7 and 8, in this position, the absorption power of the aerosol generating matrix 2 near the first probe segment 41 and near the second probe segment 51 is approximately equal, which is more conducive to the heating consistency of the aerosol generating matrix 2.

[0049] In some embodiments, either the first inner conductor unit 4 or the second inner conductor unit 5 has a bend 45. That is, in the same aerosol generating device, either the first inner conductor unit 4 or the second inner conductor unit 5 may have a bend 45. Specifically, the first inner conductor unit 4 and the second inner conductor unit 5 may be configured such that one is bent and the other is not. More specifically, either the first impedance matching section 42 or the second impedance matching section 52 may have a bend 45.

[0050] As shown in Figures 9 and 10, in some embodiments, the first probe segment 41 and the second probe segment 51 are straight cylindrical sections of similar shape and size. The first impedance matching segment 42 is also a straight cylindrical section, but its cross-sectional dimension is larger than that of the first probe segment 41. The second impedance matching segment 52 is an L-shaped cylindrical section. Specifically, the second impedance matching segment 52 includes a first part and a second part that are connected. The first part is connected to the second probe segment 51, and a 90° right angle is formed between the first part and the second part, thereby forming a bend 45. That is, in this embodiment, the second impedance matching segment 52 of the second inner conductor unit 5 has a bend 45, while the first impedance matching segment 42 of the first inner conductor unit 4 does not have a bend 45. In other embodiments, the first impedance matching segment 42 of the first inner conductor unit 4 may have a bend 45, while the second impedance matching segment 52 of the second inner conductor unit 5 may not have a bend 45.

[0051] The shapes of the first impedance matching section 42 and the second impedance matching section 52 can affect the reflection coefficient (s11) of the first inner conductor unit 4 and the second inner conductor unit 5. This reflection coefficient characterizes the ratio of the reflected wave to the incident wave; the smaller the reflection coefficient value, the higher the energy utilization rate and the higher the feed efficiency. As shown in Figure 11, the vertical axis represents the magnitude of the reflection coefficient s11 (in dB), and the horizontal axis represents the magnitude of the frequency (in GHz). The gray legend dB(S(1,1)) and the red legend dB(S(2,2)) represent the first inner conductor unit 4 and the second inner conductor unit 5, respectively. Either the first inner conductor unit 4 or the second inner conductor unit 5 has a bend 45. As can be seen from Figure 11, the troughs of the first inner conductor unit 4 and the second inner conductor unit 5 are located in the 2.40~2.50 GHz frequency band, which belongs to one of the national standard microwave frequency bands. Within the 2.40–2.50 GHz frequency band, the reflection coefficients of both the first inner conductor unit 4 and the second inner conductor unit 5 are less than -20 dB, indicating high energy utilization and high feed efficiency. Therefore, by designing one inner conductor unit to be bent and the other not bent, a suitable impedance matching structure can be constructed to achieve higher energy utilization and feed efficiency.

[0052] As shown in Figures 9 and 10, in some embodiments, the microwave heating assembly 1 further includes a hollow mounting base 7. The mounting base 7 is detachably disposed within the cavity 30 to accommodate the aerosol generating matrix 2. A clear gap is formed between the first inner conductor unit 4 and the inner wall surface of the mounting base 7. The inner wall surface of the mounting base 7 within the cavity 30 defines at least a receiving area 301. The mounting base 7 is used to accommodate the annular hollow aerosol generating matrix 2 and to provide an air intake channel for the aerosol generating matrix 2. During user suction, outside air enters the aerosol generating matrix 2 through the air intake channel on the mounting base 7, mixes with the aerosol generated by the aerosol generating matrix 2, and is then supplied to the user for suction. This effectively reduces suction resistance and lowers the temperature of the aerosol suctioned by the user. The mounting base 7 also ensures that the relative positions of the aerosol generating matrix 2 with the first inner conductor unit 4 and the second inner conductor unit 5 remain unchanged during heating, thereby ensuring heating consistency and stability. Meanwhile, the mounting base 7 effectively prevents e-liquid, condensate, and other substances from leaking into other parts of the cavity 30 and contaminating other electronic components. Finally, the mounting base 7 is in direct contact with the aerosol generating matrix 2, enabling it to collect e-liquid, condensate, and stains for easy centralized cleaning by the user. The materials of this mounting base can include Teflon, PEEK, quartz, alumina ceramic, and various composite microwave-transparent materials.

[0053] As shown in Figures 1 and 6, in some embodiments, the mounting base 7 is generally cylindrical. The second inner conductor unit 5 is at least partially disposed within the mounting base 7. For example, the second probe segment 51 is at least partially disposed within the mounting base 7. That is, the inner wall surface of the mounting base 7 within the cavity 30 can also define the hollow region 3021 and the first region 3022. In other words, the inner wall surface of the mounting base 7 within the cavity 30 defines the receiving region 301, the hollow region 3021, and the first region 3022. Thus, the mounting base 7 can simultaneously limit the second probe segment 51 of the second inner conductor unit 5, the aerosol generating matrix 2, and the first probe segment 41 of the first inner conductor unit 4, ensuring the consistency and stability of heating.

[0054] Specifically, in the embodiment shown in FIG12, the fixing base 7 includes a hollow cylindrical body 70 with both ends through it. A small portion of the side wall of the cylindrical body 70 protrudes laterally outward to form an arc-shaped boss 71. The arc-shaped boss 71 is located on the side of the aerosol generating matrix 2 away from the hollow region 3021 and is used to accommodate the second inner conductor unit 5. Specifically, the inner wall surface of the arc-shaped boss 71 defines a first region 3022 within the cavity 30. The area of ​​the fixing base 7 other than the first region 3022 defines a receiving region 301 and a hollow region 3021 located inside the receiving region 301 within the cavity 30.

[0055] As shown in Figure 13, in some other embodiments, the fixing seat 7 within the cavity 30 may only define the receiving area 301. For example, the fixing seat 7 may be an annular cylindrical shape, which just accommodates the annular aerosol generating matrix 2. Alternatively, as shown in Figure 14, in some other embodiments, the fixing seat 7 within the cavity 30 may only define the receiving area 301 and the hollow region 3021. In this case, the fixing seat 7 is a hollow cylindrical shape, and the fixing seat 7 may not have the arc-shaped boss 71. The second probe segment 51 of the second inner conductor unit 5 is located on the outside of the fixing seat 7, that is, on the side of the fixing seat 7 away from the aerosol generating matrix 2 within the receiving area 301. Its hollow portion accommodates the aerosol generating matrix 2 and the first probe segment 41 of the first inner conductor unit 4. As shown in Figure 15, in some other embodiments, the fixing seat 7 within the cavity 30 may only define the receiving area 301 and the first region 3022. In this case, only an arc-shaped boss 71 needs to be provided on the side wall of the annular cylindrical fixing seat 7.

[0056] Referring to the embodiment shown in Figure 6, along the cross-sectional direction of the microwave heating assembly, the center line x connecting the portion of the first inner conductor unit 4 disposed in the second sub-region 32 (i.e., the first probe segment 41) and the portion of the second inner conductor unit 5 disposed in the first region 3022 (i.e., the second probe segment 51) intersects the longitudinal axis y of the accommodating region 301.

[0057] Since the first probe segment 41 and the second probe segment 51 are respectively positioned on the inner and outer sides of the aerosol generating matrix 2 for heating, when the relative positions of the first probe segment 41, the second probe segment 51, and the aerosol generating matrix 2 remain unchanged, the first probe segment 41 and the second probe segment 51 can only heat a portion of the fan-shaped area (hereinafter referred to as the sector) of the aerosol generating matrix 2, i.e., unilateral heating. To make the heating effect of the aerosol generating matrix 2 more uniform, in some embodiments, the microwave heating assembly may also include a driving unit (not shown), which is coaxially connected to the aerosol generating matrix 2 and can drive the aerosol generating matrix 2 to rotate along its central axis, thereby changing the relative position between the aerosol generating matrix 2 and the first probe segment 41, and the relative position between the aerosol generating matrix 2 and the second probe segment 51. Thus, sector heating can be achieved by rotating the aerosol generating matrix 2, further improving the heating consistency of the aerosol generating matrix 2. Furthermore, since the containment area 301 is annular, that is, the aerosol generating matrix 2 is annular, the first probe segment 41 and the second probe segment 51 are respectively set on the inner and outer sides of the annular aerosol generating matrix 2, the aerosol generating matrix 2 will not cause positional interference to the first probe segment 41 and the second probe segment 51 when it rotates.

[0058] The above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. For those skilled in the art, without departing from the concept of this application, the above technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this application. Therefore, all equivalent transformations and modifications made within the scope of the claims of this application should fall within the coverage of the claims of this application.

Claims

1. A microwave heating assembly, characterized by, The outer conductor unit (3), the first inner conductor unit (4) and the second inner conductor unit (5) are arranged in the cavity (30) of the microwave heating assembly (1). The outer conductor unit (3) defines a cavity (30) for accommodating an aerosol generating substrate (2); the aerosol generating substrate (2) defines a hollow region (3021) when placed in the cavity (30), the first inner conductor unit (4) is at least partially arranged in the hollow region (3021), and the second inner conductor unit (5) is at least partially arranged on a side of the aerosol generating substrate (2) away from the hollow region (3021).

2. The microwave heating assembly of claim 1, wherein, The microwave heating assembly (1) further comprises a hollow fixing seat (7) arranged in the cavity (30) for accommodating the aerosol generating substrate (2), and a space is formed between the first inner conductor unit (4) and the inner wall of the fixing seat (7).

3. The microwave heating assembly of claim 2, wherein, The second inner conductor unit (5) is at least partially arranged in the fixing seat (7).

4. The microwave heating assembly of claim 3, wherein, The fixing seat (7) comprises a hollow cylindrical body, and the side wall of the cylindrical body forms an outwardly protruding arc-shaped boss (71) on a side of the aerosol generating substrate (2) away from the hollow region (3021) for accommodating the second inner conductor unit (5).

5. The microwave heating assembly of claim 1, wherein, The hollow region (3021) comprises a first sub-region (31) and a second sub-region (32) symmetrically distributed, any position on the first sub-region (31) is closer to the second inner conductor unit (5) than any position on the second sub-region (32); and the first inner conductor unit (4) is at least partially arranged in the second sub-region (32).

6. The microwave heating assembly of claim 5, wherein, The second sub-region (32) comprises a third sub-region (323) arranged along the inner periphery of the aerosol generating substrate (2), and the first inner conductor unit (4) is at least partially arranged in the third sub-region (323).

7. The microwave heating assembly of claim 1, wherein, In the cross-sectional direction of the microwave heating assembly, the portion of the first inner conductor unit (4) arranged in the hollow region (3021) intersects the center line (x) between the second inner conductor unit (5) on the longitudinal axis (y) of the aerosol generating substrate (2).

8. The microwave heating assembly of claim 1, wherein, Any one of the first inner conductor unit (4) and the second inner conductor unit (5) has a bending portion (45).

9. The microwave heating assembly of claim 8, wherein, The first inner conductor unit (4) comprises a first probe segment (41) and a first impedance matching segment (42) connected in sequence, and the second inner conductor unit (5) comprises a second probe segment (51) and a second impedance matching segment (52) connected in sequence. The first probe segment (41) is at least partially arranged in the hollow region (3021), and the second probe segment (51) is at least partially arranged on a side of the aerosol generating substrate (2) away from the hollow region (3021). Any one of the first impedance matching segment (42) and the second impedance matching segment (52) has the bending portion (45).

10. An aerosol generating device, characterized by, The microwave heating assembly (1) according to any one of claims 1 to 9, further comprising a microwave feed-in unit (6) connected between the outer conductor unit (3) and the microwave generation unit, the microwave feed-in unit (6) feeding microwaves generated by the microwave generation unit into the cavity (30).

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