Microwave heating assembly and aerosol generating device

Abstract

The present application discloses a microwave heating assembly and an aerosol generating device. The microwave heating assembly comprises an outer conductor unit and an inner conductor unit. The outer conductor unit has an opening end and a bottom end, a cavity is defined between the opening end and the bottom end, and the inner conductor unit is arranged inside the cavity. The inner conductor unit comprises an impedance matching section and a probe section which are connected to each other. The impedance matching section has a first end and a second end, the first end is used for connecting to a microwave feeding unit, and the first end is closer to the opening end than the second end, such that the microwave feeding unit can be arranged at a position close to the opening end of the outer conductor unit, and the position of a radio frequency circuit board connected to the microwave feeding unit can be correspondingly moved upwards, shortening the overall longitudinal size of the aerosol generating device, thereby meeting the design requirements of some aerosol generating devices having limited longitudinal sizes, and facilitating the miniaturization of the aerosol generating devices.

Description

Microwave heating assembly and aerosol generating device TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic atomization equipment, in particular to a microwave heating assembly and an aerosol generating device. BACKGROUND

[0002] The heating temperature of the heating-not-burning technology is generally between 50-350 DEG C, and compared with ordinary burning cigarettes, the heating-not-burning cigarettes can greatly reduce the release of harmful substances in tobacco while retaining the traditional cigarette taste. One of the heating forms is microwave heating, which has the advantages of high heating efficiency and fast aerosol generation. The existing aerosol generating device of the microwave heating form has a vertical coaxial structure of the inner conductor unit, and a conductor with sufficient length is needed below the aerosol generating substrate as an impedance matching structure, which is not conducive to the miniaturization of the aerosol generating device. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a microwave heating assembly and an aerosol generating device in view of at least one defect of the prior art.

[0004] The technical solution adopted by the present application to solve the technical problem is to provide a microwave heating assembly, which comprises an outer conductor unit and an inner conductor unit.

[0005] The outer conductor unit has an open end and a bottom end, and a cavity is defined between the open end and the bottom end, and the inner conductor unit is arranged in the cavity.

[0006] The inner conductor unit comprises an impedance matching section and a probe section connected to each other.

[0007] The impedance matching section comprises a first end and a second end, the first end is used for connecting a microwave feeding unit, and the first end is closer to the open end than the second end.

[0008] The probe section has a fixed end and a free end, the fixed end is connected to the second end, and the free end extends towards the open end.

[0009] Preferably, the outer conductor unit further has a microwave feeding hole arranged between the open end and the bottom end, and the open end is closer to the microwave feeding hole than the bottom end.

[0010] Preferably, the cavity comprises a first accommodating area and a second accommodating area connected to each other, the first accommodating area is used for accommodating an aerosol generating substrate, and the inner conductor unit is at least partially arranged in the second accommodating area.

[0011] Preferably, the first accommodating area and the second accommodating area are provided with a protrusion arranged at intervals, and the intervals between the protrusions define an energy gathering area, and the probe segment is arranged in the energy gathering area.

[0012] Preferably, the first end is provided with at least one first fixing hole, and the outer conductor unit is provided with at least one second fixing hole matched with the first fixing hole.

[0013] Preferably, the impedance matching segment comprises a first part and a second part connected in sequence, the first end is located at the first part, and the second end is located at the second part; the second part is in the shape of "L", and the fixed end is connected with the second part.

[0014] Preferably, the second end is formed with a bending structure, the fixed end is connected with the bending structure; and / or, the second end is provided with a connecting hole, and the fixed end is embeddedly connected with the connecting hole; and / or, the impedance matching segment and the probe segment are integrally formed.

[0015] Preferably, the microwave heating assembly further comprises a bracket, and the bracket is provided with a mounting groove, and the outer conductor unit is arranged in the mounting groove.

[0016] Preferably, the microwave heating assembly further comprises a driving unit and a fixing seat for accommodating the aerosol generating substrate; the fixing seat is arranged in the cavity; and the driving unit is in transmission connection with the fixing seat, and is used for driving the fixing seat to rotate.

[0017] The application also provides an aerosol generating device, which comprises a microwave generating unit and the microwave heating assembly of any one of the above, and the microwave generating unit comprises a radio frequency circuit board, and the microwave heating assembly further comprises a microwave feeding unit connected between the outer conductor unit and the radio frequency circuit board, and the microwave feeding unit feeds the microwave generated by the radio frequency circuit board into the cavity.

[0018] The application has at least the following beneficial effects: the first end of the impedance matching segment of the inner conductor unit for connecting the microwave feeding unit is arranged close to the opening end of the outer conductor unit, so that the microwave feeding unit can be arranged close to the opening end of the outer conductor unit, the position of the radio frequency circuit board connected with the microwave feeding unit can be correspondingly moved upward, the longitudinal dimension of the aerosol generating device as a whole is shortened, the design requirements of some aerosol generating devices with limited longitudinal dimension can be met, and the miniaturization of the aerosol generating device is facilitated. In addition, the impedance matching segment can not be arranged directly below the aerosol generating substrate, and the longitudinal dimension of the outer conductor unit can be shortened. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be further described below in combination with the drawings and embodiments, and the drawings will be described as follows.

[0020] Fig. 1 is a perspective structural schematic diagram of an aerosol generating device according to some embodiments of the present application;

[0021] Fig. 2 is a cross-sectional structural schematic diagram of an outer conductor unit and an inner conductor unit of a microwave heating assembly according to some embodiments of the present application;

[0022] Fig. 3 is a structural comparison schematic diagram between a prior art aerosol generating device and an aerosol generating device according to some embodiments of the present application;

[0023] Fig. 4 is a perspective structural schematic diagram of an outer conductor unit of a microwave heating assembly according to some embodiments of the present application;

[0024] Fig. 5 is a structural schematic diagram of the aerosol generating device shown in Fig. 1 from a top view perspective;

[0025] Fig. 6 is a cross-sectional structural schematic diagram of the aerosol generating device shown in Fig. 5 along A-A;

[0026] Fig. 7 is an exploded structural schematic diagram of the aerosol generating device shown in Fig. 1;

[0027] Fig. 8 is an electric field simulation diagram of the aerosol generating device shown in Fig. 1;

[0028] Fig. 9 is a reflection coefficient diagram of the aerosol generating device shown in Fig. 1;

[0029] Fig. 10 is a perspective structural schematic diagram of an inner conductor unit of a microwave heating assembly according to some embodiments of the present application. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0031] Referring to Fig. 1, the aerosol generating device provided by the present application comprises a microwave generating unit and a microwave heating assembly 1, which is capable of heating an aerosol generating substrate 2 by microwaves to atomize and generate aerosols for a user to smoke. The microwave generating unit comprises a radio frequency circuit board 3 connected with the microwave heating assembly 1 for generating electromagnetic wave energy. In some embodiments, the aerosol generating substrate 2 is a solid aerosol generating substrate 2 such as a processed plant leaf product. It can be understood that in other embodiments, the aerosol generating substrate 2 can also be liquid.

[0032] As shown in FIG. 2, the microwave heating assembly 1 of an embodiment of the present application comprises an outer conductor unit 10 and an inner conductor unit 11. The outer conductor unit 10 has an open end 101 and a bottom end 102, and a cavity 12 is defined between the open end 101 and the bottom end 102, and the inner conductor unit 11 is arranged in the cavity 12. The bottom end 102 can be a closed end. The aerosol generating substrate 2 can extend into the cavity 12 from the open end 101 and be located on one side of the inner conductor unit 11. The outer conductor unit 10 is provided with a microwave feed hole 103, which is arranged between the open end 101 and the bottom end 102, i.e., the microwave feed hole 103 is arranged on a side wall 104 of the outer conductor unit 10, and the extension direction of the microwave feed hole 103 can form an angle with the direction in which the aerosol generating substrate 2 is inserted into the cavity 12 or be perpendicular to the direction. Please refer to FIG. 6, the microwave heating assembly 1 further comprises a microwave feed unit 4 connected between the outer conductor unit 10 and a microwave generating unit, and the microwave feed unit 4 feeds the microwave generated by the radio frequency circuit board 3 into the cavity 12 through the microwave feed hole 103. The fed microwave can continuously oscillate in the cavity 12, the aerosol generating substrate 2 is exposed to the microwave field in the cavity 12 and is heated and atomized by the microwave to generate aerosol for a user to smoke. At the same time, the microwave feed unit 4 can also be used to isolate the outer circuit and the cavity 12 to prevent the microwave from leaking to the outer circuit to cause the circuit to fail. The microwave feed unit 4 can be a coaxial connector.

[0033] The inner conductor unit 11 comprises an impedance matching section 110 and a probe section 111 connected to each other. The probe section 111 is used to form a microwave field, and the impedance matching section 110 is used to realize impedance matching between the microwave feed unit 4 and the cavity 12. It should be noted that the meaning of impedance matching is that the characteristic impedance of the transmission line is equal to the size of the load impedance and the phase is the same, at this time the energy on the transmission line is transmitted to the load without almost reflection. The impedance matching section 110 comprises a first end 1101 and a second end 1102, the first end 1101 is used to connect the microwave feed unit 4, and the first end 1101 is closer to the open end 101 of the outer conductor unit 10 than the second end 1102. The probe section 111 has a fixed end 1111 and a free end 1112, the fixed end 1111 is connected to the second end 1102, and the free end 1112 extends in the direction close to the open end 101 of the outer conductor unit 10, i.e., the free end 1112 extends towards the open end 101 of the outer conductor unit 10. In the energized state, a strong electric field region is formed at the end of the free end 1112 by electromagnetic energy, and when the aerosol generating substrate 2 is placed near the strong electric field region, the aerosol generating substrate 2 is heated by the polarization loss effect of the electromagnetic wave. Usually, the microwave feed unit 4 is connected to the outer conductor unit 10 and the impedance matching section 110 of the inner conductor unit 11 away from the probe section 111 through the microwave feed hole 103 at the same time (i.e., the first end 1101), and an open circuit is formed at the free end 1112 of the inner conductor unit 11.

[0034] Please refer to FIG. 3, the left side of FIG. 3 shows some existing microwave heating assemblies for aerosol generating devices, the inner conductor unit 11 of the existing microwave heating assembly is usually fixed at the bottom end 102 of the outer conductor unit 10, that is, the end of the impedance matching section 110 away from the probe section 111 is fixedly connected to the bottom end 102 of the outer conductor unit 10, the central axis x1 of the impedance matching section 110 and the central axis x2 of the probe section 111 are approximately located on the same straight line, forming a vertical coaxial structure. Correspondingly, the microwave feed hole 103 needs to be arranged on the outer conductor unit 10 close to the bottom end 102 thereof, so that the microwave feed unit 4 connects the impedance matching section 110 of the outer conductor unit 10 and the inner conductor unit 11 through the microwave feed hole 103. Thus, the microwave feed unit 4 is usually arranged on the lower side of the outer conductor unit 10 (close to the bottom end 102). The defect of such arrangement is that the overall longitudinal size (height) of the aerosol generating device is large, and such structure cannot meet the design requirements of some aerosol generating devices with limited longitudinal size, which is not conducive to the miniaturization of the aerosol generating device. The right side of FIG. 3 shows the microwave heating assembly 1 of some embodiments of the present application, which is different from the prior art on the left side in that the end of the impedance matching section 110 away from the probe section 111 (that is, the first end 1101 for connecting the microwave feed unit 4) is fixedly connected to the open end 101 of the outer conductor unit 10, and the central axis y1 of the impedance matching section 110 and the central axis y2 of the probe section 111 are not on the same straight line, and the central axes of the two are connected to form a "U" shape, that is, the inner conductor unit 11 as a whole has a U-shaped structure, so that the inner conductor unit 11 is reversely fixedly connected to the open end 101 of the outer conductor unit 10. Corresponding to the position of the first end 1101 of the impedance matching section 110, the microwave feed hole 103 is arranged on the outer conductor unit 10 close to the open end 101 thereof, that is, the open end 101 of the outer conductor unit 10 is closer to the microwave feed hole 103 than the bottom end 102 thereof. Therefore, the microwave feed unit 4 connected to the microwave feed hole 103 can be arranged on the upper side of the outer conductor unit 10 (close to the open end 101), and the position of the radio frequency circuit board 3 connected to the microwave feed unit 4 can be correspondingly moved upward, so that the overall longitudinal size of the aerosol generating device is shortened, which can meet the design requirements of some aerosol generating devices with limited longitudinal size, and is conducive to the miniaturization of the aerosol generating device. Moreover, the impedance matching section 110 can not be arranged directly below the aerosol generating substrate 2, and the inner conductor unit 11 can be arranged on one side of the aerosol generating substrate 2, which is conducive to shortening the longitudinal size of the outer conductor unit 10.

[0035] The outer conductor unit 10 can be made of a metal material or other high-conductivity material. For example, the outer conductor unit 10 can include one or more of gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, stainless steel, etc. Alternatively, the outer conductor unit 10 can include a non-metallic body and a metal coating layer disposed on an outer layer of the non-metallic body. The inner conductor unit 11 can be made of a metal material or other high-conductivity material. Alternatively, the inner conductor unit 11 can include a non-metallic material and a metal coating layer.

[0036] As shown in FIG. 4, in some embodiments, the cavity 12 includes a first accommodating region 121 and a second accommodating region 122 in communication, the first accommodating region 121 being configured to accommodate the aerosol generating substrate 2, and the inner conductor unit 11 being at least partially disposed in the second accommodating region 122. That is, the inner conductor unit 11 can be entirely disposed in the second accommodating region 122, or can be partially disposed in the second accommodating region 122. The aerosol generating substrate 2 and the inner conductor unit 11 are limited by the first accommodating region 121 and the second accommodating region 122, such that the inner conductor unit 11 is limited on one side of the aerosol generating substrate 2. The probe segment 111 is disposed close to the aerosol generating substrate 2. In the energized state, the electromagnetic energy forms a strong electric field region at the end of the free end 1112 of the probe segment 111, and the aerosol generating substrate 2 is heated.

[0037] As shown in FIG. 4, in some embodiments, two protrusions 123 are arranged between the first accommodating area 121 and the second accommodating area 122, and the interval between the two protrusions 123 defines an energy focusing area 124, in which the probe segment 111 is arranged, and the impedance matching segment 110 is arranged in the second accommodating area 122. The protrusions 123 can be structures integrally formed with the outer conductor unit 10; the protrusions 123 can also be separately formed members fixed in the cavity 12 by later installation. At this time, the inner conductor unit 11 is arranged in the second accommodating area 122 and the energy focusing area 124. Please refer to FIG. 5, the energy focusing area 124 is used to increase the focusing degree of electromagnetic energy in the cavity 12, so that the electromagnetic energy is more concentrated in the second accommodating area 122. In the case that the inner conductor unit 11 and the aerosol generating substrate 2 are fixed, in the energized state, the inner conductor unit 11 directly heats only a part of the sector area 20 (referred to as sector) circumferentially of the aerosol generating substrate 2, so that the energy is more quickly absorbed by the aerosol generating substrate 2, and the heating rate is improved. However, in order to avoid the aerosol generating substrate 2 from continuously being locally heated to produce burnt taste, the aerosol generating substrate 2 can be rotated to heat another sector area 20 after heating a sector area 20. That is, a preset time interval can be designed, and the aerosol generating substrate 2 is rotated at the time interval, so that each different sector area 20 of the aerosol generating substrate 2 is sequentially and cyclically heated, thereby ensuring uniform heating of the aerosol generating substrate 2.

[0038] In order to realize the timed rotation of the aerosol generating substrate 2, as shown in FIG. 5 and FIG. 6, in some embodiments, the microwave heating assembly 1 further comprises a driving unit 5 and a fixing seat 6. The fixing seat 6 is detachably arranged in the cavity 12, and is mainly used to accommodate the aerosol generating substrate 2. The driving unit 5 is in transmission connection with the fixing seat 6, and is used to drive the fixing seat 6 to rotate. Thus, the aerosol generating substrate 2 accommodated in the fixing seat 6 can rotate under the driving of the driving unit 5. By setting the opening time of the driving unit 5, the fixing seat 6 can be driven to rotate at a preset interval time, thereby realizing the timed rotation of the aerosol generating substrate 2.

[0039] Specifically, the fixed seat 6 can also provide an air inlet channel for the aerosol generating substrate 2. Under the action of user suction, external air enters the aerosol generating substrate 2 through the air inlet channel on the fixed seat 6, mixes with the aerosol generated by the aerosol generating substrate 2, and is inhaled by the user. In this way, the resistance can be effectively reduced, and the temperature of the aerosol inhaled by the user can be reduced. The fixed seat 6 can also ensure that the relative position between the aerosol generating substrate 2 and the inner conductor unit 11 does not change during heating, thereby ensuring the consistency and stability of heating. At the same time, the fixed seat 6 can also effectively prevent the leakage of tobacco tar, condensate and the like into other places in the cavity 12, thereby polluting other electronic components. Finally, the fixed seat 6 is in direct contact with the aerosol generating substrate 2, and can collect tobacco tar, condensate and stains, thereby facilitating centralized cleaning by the user. The material of the fixed seat 6 can include Teflon, PEEK, quartz, alumina ceramic, various composite wave-transparent materials, and the like.

[0040] Further, as shown in FIGS. 5 and 6, in some embodiments, the driving unit 5 includes a driving motor 50, a first gear 51 and a second gear 52. Referring to FIG. 4, the outer conductor unit 10 is further provided with a motor mounting groove 106 on one side of the cavity 12, and the driving motor 50 is embeddedly connected to the motor mounting groove 106 for fixation. The first gear 51 and the second gear 52 are adjacently arranged at the end face of the open end 101 of the outer conductor unit 10. The first gear 51 is coaxially and drivingly connected to the output shaft of the driving motor 50. The second gear 52 is engaged with the first gear 51 and is sleeved on the outer periphery of the fixed seat 6. The torque output by the driving motor 50 is sequentially transmitted to the first gear 51, the second gear 52 and the fixed seat 6, thereby driving the aerosol generating substrate 2 accommodated in the fixed seat 6 to rotate together with the fixed seat 6. Specifically, as shown in the embodiment of FIG. 6, the outer periphery of the fixed seat 6 is formed with a ring of protrusions 123. Correspondingly, the inner periphery of the second gear 52 is provided with a ring of grooves. The second gear 52 and the fixed seat 6 are embeddedly fixed through the protrusions 123 and the grooves.

[0041] When the user inhales, the airflow sensing element recognizes the suction behavior, and the power supply is turned on. The inner conductor unit 11 heats the aerosol generating substrate 2 in the powered state (time-consuming 2 seconds). When the user stops inhaling, the heating is paused, and the driving motor 50 outputs power to drive the fixed seat 6 to rotate (exemplarily, the rotation angle is 30°), thereby completing a complete suction process. Thus, the aerosol generating device has a suction-stop function.

[0042] Please refer to FIG. 8 and FIG. 9. As shown in FIG. 8, the electric field in the cavity 12 is only concentrated in a part of the circumferential sector area 20 of the aerosol generating substrate 2. After heating one sector area 20, the aerosol generating substrate 2 is rotated by a certain angle to realize sector area switching. As shown in FIG. 9, the vertical coordinate represents the magnitude of the reflection coefficient S(1, 1) (unit: dB), and the horizontal coordinate represents the frequency (unit: GHz). The reflection coefficient represents the ratio of reflected wave to incident wave. The smaller the reflection coefficient value, the higher the energy utilization rate and the higher the feeding efficiency. As shown in FIG. 9, the trough is in the frequency band of 2.40-2.50 GHz, which belongs to one of the national standard microwave frequency bands. The reflection coefficients corresponding to the frequency band of 2.40-2.50 GHz are all less than -20 dB, indicating good impedance matching, high feeding efficiency, high energy utilization rate, high heating efficiency, very short preheating time, and the ability to pause heating at any time.

[0043] As shown in FIG. 4 and FIG. 7, in some embodiments, the first end 1101 of the impedance matching section 110 of the inner conductor unit 11 is provided with at least one first fixing hole 113, and the outer conductor unit 10 is provided with at least one second fixing hole 105 matched with the first fixing hole 113. The first fixing hole 113 and the second fixing hole 105 are used for the alignment and fastening connection between the first end 1101 of the impedance matching section 110 of the inner conductor unit 11 and the outer conductor unit 10, which only needs to pass a fastener through the first fixing hole 113 and the second fixing hole 105. The number of the first fixing hole 113 and the second fixing hole 105 can be one or more than one. In the embodiment shown in FIG. 4 and FIG. 7, the second fixing hole 105 is arranged on the end face of the open end 101 of the outer conductor unit 10. In this way, during installation, the inner conductor unit 11 can be placed into the second accommodating area 122 of the cavity 12 from top to bottom, and then the inner conductor unit 11 is fixed to the outer conductor unit 10 by passing a fastener (not shown) through the first fixing hole 113 and the second fixing hole 105. In some other embodiments not shown, the second fixing hole 105 can also be arranged at other positions on the outer conductor unit 10, such as the side wall 104 of the outer conductor unit 10.

[0044] As shown in FIG. 10, in some embodiments, the second end 1102 of the impedance matching section 110 of the inner conductor unit 11 is formed with a bending structure, and the fixed end 1111 of the probe section 111 is connected with the bending structure. Specifically, the impedance matching section 110 of the inner conductor unit 11 includes a first portion 110a and a second portion 110b connected with each other, the first end 1101 of the impedance matching section 110 is located at the first portion 110a, and the second end 1102 is located at the second portion 110b. That is, the fixed end 1111 of the probe section 111 is connected with the second portion 110b, and the first fixing hole 113 is located at the first portion 110a. The first portion 110a of the impedance matching section 110 is fixed at the open end 101 of the outer conductor unit 10. The second portion 110b of the impedance matching section 110 is in an "L" shape, and the "L" shaped second portion 110b forms the bending structure. Further, the second portion 110b includes a third portion 110c extending in a longitudinal direction and a fourth portion 110d extending in a transverse direction. The "transverse direction" is perpendicular to the "longitudinal direction". The third portion 110c is connected with the first portion 110a. The fixed end 1111 of the probe section 111 is connected with the fourth portion 110d. By providing the bending structure, the impedance matching section 110 and the probe section 111 can be arranged side by side in the transverse direction, so as to reduce the longitudinal dimension of the inner conductor unit 11, and thus facilitate reducing the longitudinal dimension of the aerosol generating device as a whole.

[0045] As shown in FIG. 10, in some embodiments, the second end 1102 of the impedance matching section 110 of the inner conductor unit 11 is provided with a connecting hole 1103, and the fixed end 1111 is embeddedly connected with the connecting hole 1103. Specifically, the connecting hole 1103 is located at the second portion 110b of the impedance matching section 110. The probe section 111 of the inner conductor unit 11 can be in a longitudinal cylindrical shape, and the fixed end 1111 thereof extends into the connecting hole 1103 for fixation. Of course, the probe section 111 of the inner conductor unit 11 is not limited to be in a cylindrical shape, but can also be in other shapes.

[0046] In other embodiments, the impedance matching section 110 and the probe section 111 can be integrally formed.

[0047] As shown in FIGS. 1 and 7, in some embodiments, the microwave heating assembly 1 further includes a bracket 7, the bracket 7 is provided with a mounting groove 70, and the outer conductor unit 10 is arranged in the mounting groove 70. The radio frequency circuit board 3 is also mounted on the bracket 7.

[0048] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A microwave heating assembly (1), characterized in that, It includes an outer conductor unit (10) and an inner conductor unit (11); The outer conductor unit (10) has an open end (101) and a bottom end (102), and a cavity (12) is defined between the open end (101) and the bottom end (102), and the inner conductor unit (11) is disposed in the cavity (12); The inner conductor unit (11) includes an impedance matching section (110) and a probe section (111) connected together. The impedance matching section (110) includes a first end (1101) and a second end (1102). The first end (1101) is used to connect to the microwave feed unit (4). The first end (1101) is closer to the opening end (101) than the second end (1102). The probe segment (111) has a fixed end (1111) and a free end (1112), the fixed end (1111) being connected to the second end (1102), and the free end (1112) extending toward the open end (101).

2. The microwave heating assembly (1) according to claim 1, characterized in that, The outer conductor unit (10) also has a microwave feed hole (103) disposed between the opening end (101) and the bottom end (102), wherein the opening end (101) is closer to the microwave feed hole (103) than the bottom end (102).

3. The microwave heating assembly (1) according to claim 1, characterized in that, The cavity (12) includes a first accommodating region (121) and a second accommodating region (122) that are connected to each other. The first accommodating region (121) is used to contain the aerosol generating matrix (2), and the inner conductor unit (11) is at least partially disposed in the second accommodating region (122).

4. The microwave heating assembly (1) according to claim 3, characterized in that, There are protrusions (123) spaced apart between the first accommodating area (121) and the second accommodating area (122), and the interval between the protrusions (123) defines the energy focusing area (124), and the probe segment (111) is disposed in the energy focusing area (124).

5. The microwave heating assembly (1) according to claim 1, characterized in that, The first end (1101) is provided with at least one first fixing hole (113), and the outer conductor unit (10) is provided with at least one second fixing hole (105) that is adapted to the first fixing hole (113).

6. The microwave heating assembly (1) according to claim 5, characterized in that, The second fixing hole (105) is provided on the end face of the opening end (101).

7. The microwave heating assembly (1) according to claim 1, characterized in that, The impedance matching section (110) includes a first part (110a) and a second part (110b) connected together, with the first end (1101) located in the first part (110a) and the second end (1102) located in the second part (110b); the second part (110b) is L-shaped, and the fixed end (1111) is connected to the second part (110b); And / or, the second end (1102) is provided with a connecting hole (1103), and the fixed end (1111) is fitted and connected to the connecting hole (1103); And / or, the impedance matching section (110) and the probe section (111) are integrally formed structures.

8. The microwave heating assembly (1) according to claim 1, characterized in that, The microwave heating assembly (1) also includes a bracket (7) having a mounting groove (70) and the outer conductor unit (10) being disposed in the mounting groove (70).

9. The microwave heating assembly (1) according to claim 1, characterized in that, The microwave heating assembly (1) also includes a driving unit (5) and a mounting base (6) for accommodating the aerosol generation matrix (2). The fixing seat (6) is disposed in the cavity (12); The drive unit (5) is connected to the fixed base (6) for driving the fixed base (6) to rotate.

10. An aerosol generating device, characterized in that, The microwave heating assembly (1) includes a microwave generating unit and a microwave heating component (1) according to any one of claims 1 to 9. The microwave generating unit includes a radio frequency circuit board (3), and the microwave heating component (1) further includes a microwave feed unit (4) connected between the outer conductor unit (10) and the radio frequency circuit board (3). The microwave feed unit (4) feeds the microwaves generated by the radio frequency circuit board (3) into the cavity (12).

Images