Microwave heating assembly and aerosol generating device

Abstract

The invention discloses a microwave heating assembly and an aerosol generating device. The microwave heating assembly comprises an outer conductor unit, a cavity defined by the outer conductor unit and an inner conductor unit arranged in the cavity. The cavity comprises an accommodating area for accommodating an aerosol generating substrate; the accommodating area is provided with a longitudinal axis and a transverse direction intersected with the longitudinal axis; the inner conductor unit is at least partially positioned on the transverse outer side of the accommodating area and comprises a probe section and an impedance matching section which are connected with each other; the extension direction of the probe section is parallel to the longitudinal axis; the impedance matching section comprises a main body, and the extension direction of the main body intersects with the longitudinal axis, so that the longitudinal size of the impedance matching section can be reduced, and therefore, the microwave heating assembly can be applied to some aerosol generating devices with limited longitudinal sizes. The microwave heating assembly with the small longitudinal size can promote reduction of the overall longitudinal size of the aerosol generating device so as to facilitate miniaturization of the aerosol generating device.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic atomization devices, and particularly to a microwave heating component and an aerosol generating device. Background Art

[0002] The heating temperature of heat-not-burn technology is generally between 50 °C and 350 °C. Compared with ordinary combustible cigarettes, heat-not-burn cigarettes can significantly reduce the release of harmful substances in tobacco while retaining the taste of traditional cigarettes. One of the heating forms is microwave heating, which has the advantages of high heating efficiency and fast aerosol generation. Existing aerosol generating devices with microwave heating usually include an outer conductor unit and an inner conductor unit disposed inside the outer conductor unit. The aerosol generating substrate to be heated and atomized is placed in the outer conductor unit. The inner conductor unit generally extends longitudinally along the outer conductor unit, and the generated microwave energy goes from bottom to top, reflecting and superimposing at the terminal of the inner conductor unit to form a strong electric field region for quickly heating the aerosol generating substrate. However, this results in a relatively large longitudinal dimension (height) of the outer conductor unit, and such a structure cannot meet the design requirements of some aerosol generating devices with limited longitudinal dimensions (height). Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an improved microwave heating component and an aerosol generating device to meet the design requirements of some aerosol generating devices with limited longitudinal dimensions.

[0004] The technical solution adopted by the present invention to solve its technical problem is: providing a microwave heating component, which includes an outer conductor unit, a cavity defined by the outer conductor unit, and an inner conductor unit disposed in the cavity;

[0005] The cavity includes a containing area for containing the aerosol generating substrate; the containing area has a longitudinal axis and a transverse direction intersecting with the longitudinal axis, and the aerosol generating substrate is loaded into the containing area along the longitudinal axis;

[0006] At least a part of the inner conductor unit is located outside the transverse direction of the containing area, and it includes a probe section and an impedance matching section connected to each other;

[0007] At least a part of the extending direction of the probe section is parallel to the longitudinal axis;

[0008] The impedance matching section includes a main body, and the extending direction of the main body intersects with the longitudinal axis.

[0009] Preferably, the impedance matching section further includes at least one branch section connected to the main body at an angle.

[0010] Preferably, at least one of the branch sections has a bending angle.

[0011] Preferably, at least one of the branches includes an adjacent first part and a second part. The first part is joined to the main body at an angle, the second part is bent relative to the first part, and the second part is closer to the probe section than the first part, forming a bending angle between the first part and the second part.

[0012] Preferably, the number of the branches is at least two, and the heights of at least two of the branches are not equal.

[0013] Preferably, along the direction of the probe section close to the inner conductor unit, the heights of the respective branches increase or decrease one by one.

[0014] Preferably, the probe section has a bending angle; and / or, the main body has a bending angle.

[0015] Preferably, the outer conductor unit includes an adjacent side wall and a bottom wall, and the side wall and the bottom wall together enclose and define the cavity; the extending direction of the side wall is parallel to the longitudinal axis, and a microwave feeding hole communicating with the cavity is provided on the side wall.

[0016] And / or, the microwave heating assembly further includes a first fixing seat for accommodating the aerosol generating matrix. The first fixing seat is disposed in the cavity and has a first accommodating cavity; the accommodating area is located in the first accommodating cavity;

[0017] And / or, the microwave heating assembly further includes a second fixing seat for fixing the inner conductor unit. The second fixing seat is disposed in the cavity and is arranged laterally outside the accommodating area.

[0018] Preferably, the lateral direction of the accommodating area is perpendicular to the longitudinal axis;

[0019] And / or, the extending direction of the main body is perpendicular to the longitudinal axis.

[0020] The present invention further provides an aerosol generating device, which includes a microwave generating unit and the microwave heating assembly according to any one of the above. The microwave heating assembly further includes a microwave feeding unit connected between the outer conductor unit and the microwave generating unit, and the microwave feeding unit feeds the microwave generated by the microwave generating unit into the cavity of the outer conductor unit.

[0021] The present invention has at least the following beneficial effects: The extending direction of the main body of the impedance matching section of the inner conductor unit intersects with the longitudinal axis, which is beneficial to reducing the longitudinal dimension of the impedance matching section, and thus beneficial to reducing the longitudinal dimension of the microwave heating component. In this way, the microwave heating component can be applied to some aerosol generating devices with limited longitudinal dimensions (height). On the other hand, the microwave heating component with a smaller longitudinal dimension can promote the reduction of the overall longitudinal dimension (height) of the aerosol generating device, which is beneficial to the miniaturization of the aerosol generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0023] Figure 1 is a schematic diagram of the overall structure of the microwave heating component according to the first embodiment of the present invention;

[0024] Figure 2 is Figure 1 a top view structure schematic diagram of the microwave heating component shown;

[0025] Figure 3 is Figure 2 a sectional view taken along line A-A of

[0026] Figure 4 is Figure 3 a schematic diagram of the structure of the inner conductor unit of the microwave heating component shown;

[0027] Figure 5 is a schematic diagram of an equal-proportion structure comparison between the microwave heating component of the prior art and the microwave heating component according to the first embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of the structure of the inner conductor unit of the microwave heating component according to the second embodiment of the present invention;

[0029] Figure 7 is a schematic diagram of the structure comparison of the inner conductor units of three different embodiments of the present invention;

[0030] Figure 8 is Figure 7 a reflection coefficient diagram corresponding to the three inner conductor units of

[0031] Figure 9 is a schematic diagram of the structure of the inner conductor unit of the microwave heating component according to the third embodiment of the present invention;

[0032] Figure 10 is a schematic diagram of the structure of the inner conductor unit of the microwave heating component according to the fourth embodiment of the present invention;

[0033] Figure 11It is a schematic structural diagram of the inner conductor unit of the microwave heating component according to the fifth embodiment of the present invention;

[0034] Figure 12 It is a schematic structural diagram of the inner conductor unit of the microwave heating component according to the sixth embodiment of the present invention;

[0035] Figure 13 It is a schematic structural diagram of the inner conductor unit of the microwave heating component according to the seventh embodiment of the present invention;

[0036] Figure 14 It is a schematic diagram of the electric field intensity according to the first and seventh embodiments of the present invention;

[0037] Figure 15 It is a schematic diagram of the overall structure of the microwave heating component according to the eighth embodiment of the present invention;

[0038] Figure 16 It is Figure 15 A top view structural diagram of the shown microwave heating component;

[0039] Figure 17 It is Figure 16 The B - B cross - sectional view of

[0040] Figure 18 It is Figure 1 A disassembled structural diagram of the shown microwave heating component;

[0041] Figure 19 It is a schematic diagram of the structure of the microwave heating component according to some other embodiments of the present invention. Detailed implementation manners

[0042] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0043] 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 specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present invention can be understood according to specific circumstances.

[0044] Please refer to Figures 1 to 3, the aerosol generating device provided by the present invention includes a microwave generating unit (not shown) and a microwave heating component 1. The microwave heating component 1 can use microwaves to heat an aerosol generating substrate (not shown) to atomize and generate an aerosol for the user to inhale. In some embodiments, the aerosol generating substrate is a solid aerosol generating substrate such as a processed plant leaf product. It can be understood that in other embodiments, the aerosol generating substrate can also be a liquid aerosol generating substrate.

[0045] As Figure 3 and Figure 4 shown, the microwave heating component 1 of the first embodiment of the present invention includes an outer conductor unit 10, a cavity 101 defined by the outer conductor unit 10, an inner conductor unit 11 disposed in the cavity 101, and a microwave feeding unit connected between the outer conductor unit 10 and the microwave generating unit. When the aerosol generating device is in use, the aerosol generating substrate is inserted into the cavity 101 of the outer conductor unit 10. The microwave feeding unit feeds the microwaves generated by the microwave generating unit into the cavity 101. The fed microwaves can continuously oscillate in the cavity 101. The aerosol generating substrate is exposed to the microwave field in the cavity 101 and is heated and atomized by the microwaves to generate an aerosol for the user to inhale.

[0046] The outer conductor unit 10 can be processed from a metal material or other highly conductive materials. For example, the outer conductor unit 10 can include one or more of gold, silver, copper, aluminum, iron, gold-containing alloys, aluminum-containing alloys, copper-containing alloys, iron-containing alloys, stainless steel, etc. Alternatively, the outer conductor unit 10 can also include a non-metal main body and a metal coating provided on the outer layer of the non-metal main body.

[0047] As Figure 3 shown, the cavity 101 includes a receiving area for receiving the aerosol generating substrate. The receiving area is the space of the cavity 101 occupied when the aerosol generating substrate is placed in the cavity 101. That is, the size of the receiving area is consistent with the volume of the aerosol generating substrate loaded into the cavity 101. The receiving area has a longitudinal axis y, and the aerosol generating substrate is loaded into the receiving area along the longitudinal axis y. The central axis of the aerosol generating substrate can be parallel to the longitudinal axis y or can intersect the longitudinal axis y at an angle. When the central axis of the aerosol generating substrate intersects the longitudinal axis y at an angle, preferably, the angle formed between the central axis of the aerosol generating substrate and the longitudinal axis y is less than 30°. The receiving area also has a transverse direction intersecting the longitudinal axis y. The transverse direction of the receiving area can intersect the longitudinal axis y perpendicularly or can intersect the longitudinal axis y at an angle. Hereinafter, the so-called "longitudinal direction" can all refer to the extending direction of the longitudinal axis y.

[0048] The inner conductor unit 11 is at least partially located laterally outside the accommodation area of the cavity 101, that is, the inner conductor unit 11 can be partially located laterally outside the accommodation area or entirely located laterally outside the accommodation area. However, the inner conductor unit 11 is still within the cavity 101. The inner conductor unit 11 includes a probe section 11a and an impedance matching section 11b that are connected. At least part of the extending direction of the probe section 11a is parallel to the longitudinal axis y. Generally, the probe section 11a of the inner conductor unit 11 is closer to the accommodation area of the cavity 101 than its impedance matching section 11b. The probe section 11a is used to form a microwave field, and the impedance matching section 11b is used to achieve impedance matching between the microwave feeding unit and the cavity 101. It should be noted that the meaning of impedance matching is that the characteristic impedance of the transmission line is equal to the load impedance in magnitude and the same in phase. At this time, the energy on the transmission line is transmitted to the load with almost no reflection. Generally, the impedance matching section 11b of the inner conductor unit 11 needs to have a sufficient length to achieve impedance matching. Therefore, generally speaking, the impedance matching section 11b of the inner conductor unit 11 has a greater impact on the overall size, especially the length, of the inner conductor unit 11 compared to its probe section 11a.

[0049] In the prior art, for an aerosol generating device in the form of microwave heating, the extending direction of the impedance matching section of its inner conductor unit is usually parallel to the longitudinal axis y, that is, the impedance matching section extends longitudinally outside the cavity 101.

[0050] In particular, the impedance matching section 11b of the present invention includes a main body 1101, and the extending direction of the main body 1101 intersects with the longitudinal axis y. Specifically, the extending direction of the main body 1101 can be perpendicular to the longitudinal axis y or intersect at an angle with the longitudinal axis y. The main body 1101 is connected to the probe section 11a. As Figure 3 shown in the embodiment, when the extending direction of the main body 1101 is perpendicular to the longitudinal axis y, its longitudinal dimension is smaller than the longitudinal dimension of the impedance matching section extending longitudinally in the prior art. When the extending direction of the main body 1101 intersects at an angle with the longitudinal axis y, it is equivalent to the main body 1101 being inclined and arranged outside the accommodation area of the cavity 101. The longitudinal dimension of the inclined main body 1101 is also smaller than the longitudinal dimension of the impedance matching section extending longitudinally in the prior art. Therefore, the extending direction of the main body 1101 intersecting with the longitudinal axis y is more conducive to reducing the longitudinal dimension of the impedance matching section 11b. The probe section 11a is connected to the main body 1101.

[0051] As Figure 3 shown, in this embodiment, the main body 1101 is located laterally outside the accommodation area. Of course, as Figure 19As shown, in other embodiments, the main body 1101 may also be located outside the accommodation area in the longitudinal direction. Even if the main body 1101 is located outside the accommodation area in the longitudinal direction, but the extending direction of the main body 1101 is perpendicular to or intersects with the longitudinal axis y, that is, the longitudinal dimension of the main body 1101 arranged horizontally or obliquely can also be smaller than the longitudinal dimension of the impedance matching section arranged longitudinally in the prior art.

[0052] Specifically, as Figure 3 shown in the embodiment, the extending direction of the main body 1101 of the inner conductor unit is perpendicular to the longitudinal axis y, that is, the main body 1101 is arranged horizontally. The main body 1101 of the inner conductor unit is generally a long strip-shaped column, which extends horizontally and has two ends in the horizontal direction and opposite top and bottom edges in the longitudinal direction. The bottom edge of the main body 1101 may be flush with the bottom edge of the accommodation area. Since the accommodation area is the space occupied by the aerosol generation matrix in the cavity 101 when the aerosol generation matrix is placed in the cavity 101, the bottom edge of the accommodation area can be understood as the bottom surface of the aerosol generation matrix accommodated therein.

[0053] The beneficial effects of the present invention at least include: the extending direction of the main body 1101 of the impedance matching section 11b of the inner conductor unit 11 intersects with the longitudinal axis y, which is beneficial to reducing the longitudinal dimension of the impedance matching section 11b, thereby being beneficial to reducing the longitudinal dimension of the cavity 101, thereby being beneficial to reducing the longitudinal dimension of the outer conductor unit 10, and thereby being beneficial to reducing the longitudinal dimension of the microwave heating component 1. In this way, the microwave heating component 1 can be applied to some aerosol generating devices with limited longitudinal dimensions (height). On the other hand, the microwave heating component 1 with a smaller longitudinal dimension can promote the reduction of the overall longitudinal dimension (height) of the aerosol generating device, which is beneficial to the miniaturization of the aerosol generating device.

[0054] Please refer to Figure 5 , Figure 5 which is a schematic diagram of the proportional structure comparison between the microwave heating component in the prior art and the microwave heating component 1 of the first embodiment of the present invention on the premise of using a solid aerosol generation matrix with the same size. Figure 5 The left side in Figure 5 shows the microwave heating component described in the background art, the inner conductor unit of which extends longitudinally, and its longitudinal length reaches 25 mm, resulting in a relatively large overall longitudinal dimension (height) of the microwave heating component. Figure 5 The right side in

[0055] Furthermore, as Figure 4 shown, the impedance matching section 11b further includes at least one stub 1102 that is angled with respect to the main body 1101. That is, the stub 1102 is connected to the main body 1101, and an angle greater than 0° and less than 180° is formed between the stub 1102 and the main body 1101. For example Figure 4 in the first embodiment shown, a 90° angle is formed between each stub 1102 and the main body 1101, that is, each stub 1102 is perpendicularly connected to the main body 1101. Of course, in other embodiments, the angle formed between each stub 1102 and the main body 1101 may not be limited to 90°.

[0056] Specifically, as Figure 4 shown in the embodiment, at least one stub 1102 includes a connected first part 11021 and a second part 11022. The first part 11021 is angled with respect to the main body 1101, the second part 11022 is bent relative to the first part 11021, and the second part 11022 is closer to the probe section 11a relative to the first part 11021. That is, the second part 11022 rotates a certain angle in the direction closer to the probe section 11a with the connection point between it and the first part 11021 as the fixed point, thereby forming a bending angle between the first part 11021 and the second part 11022. In other embodiments, it may also be that the first part 11021 is closer to the probe section 11a relative to the second part 11022. At this time, that is, the second part 11022 rotates a certain angle in the direction away from the probe section 11a with the connection point between it and the first part 11021 as the fixed point.

[0057] As described above, generally, the impedance matching section 11b of the inner conductor unit 11 needs to have a sufficient length to achieve impedance matching. In the case without the stub 1102, the characteristic impedance of the inner conductor unit 11 can be adjusted by changing the length of the main body 1101. At this time, the greater the length of the main body 1101, the lower the resonant frequency that can be achieved, which is more conducive to reaching the target resonant frequency. After setting a number of stubs 1102 that are angled with respect to the main body 1101, the stubs 1102 can also participate in adjusting the characteristic impedance of the inner conductor unit 11. Increasing the length of the main body 1101 is no longer the only means to reduce the resonant frequency. The stubs 1102 and the main body 1101 can jointly participate in adjusting the characteristic impedance of the inner conductor unit 11. In this way, the laterally extending length of the main body 1101 can be designed to be smaller, which helps to reduce the lateral size of the inner conductor unit 11.

[0058] Specifically, for existing aerosol generating devices in the form of microwave heating, their designed operating frequency is usually 2.45 GHz. Therefore, the following will take the operating frequency of 2.45 GHz as an example for illustration. Generally, the longer the length of the impedance matching section 11b, the lower the resonant frequency achieved. Therefore, in order to achieve a resonant frequency of 2.45 GHz, during design, the resonant frequency is usually gradually decreased by gradually increasing the length of the impedance matching section 11b until the designed operating frequency of 2.45 GHz is reached. After the stub 1102 is set, with the length of the main body 1101 remaining unchanged, as the number of stubs 1102 increases, the resonant frequency can also be gradually decreased. As Figure 7 shown, Figure 7 Figure 4 shows the inner conductor units 11 in three shapes, and the lengths of the main bodies 1101 of the inner conductor units 11 in the three shapes are approximately the same. The main body 1101 of the impedance matching section 11b on the far right is not provided with a stub 1102, the main body 1101 of the impedance matching section 11b in the middle is provided with one stub 1102, and the main body 1101 of the impedance matching section 11b on the far left is provided with two stubs 1102. Again, as Figure 8 shown, Figure 8 Figure 5 Figure 7 shows the resonant frequencies corresponding to the inner conductor units 11 in the three shapes in Figure 4. Combining Figure 7 Figure 4 Figure 8 and Figure 5, it can be known that the inner conductor unit 11 on the far right is not provided with a stub 1102, and the resonant frequency is 2.57 GHz. The inner conductor unit 11 in the middle is provided with a single stub 1102, and the resonant frequency is 2.47 GHz. The inner conductor unit 11 on the far left is provided with two stubs 1102, and the resonant frequency is 2.45 GHz. It can be seen that with the length of the main body 1101 remaining unchanged, the resonant frequency can also be decreased by increasing the number of stubs 1102 to reach the designed operating frequency of 2.45 GHz. In this way, the length of the main body 1101 can be effectively decreased, that is, the lateral dimension of the inner conductor unit 11 is decreased.

[0059] Table 1

[0060] In addition, from another perspective, it can be seen from Table 1 that on the basis of achieving the same resonant frequency, as the number of stubs 1102 increases, the required length of the main body 1101 gradually decreases.

[0061] Combining Figure 7 Figure 4 Figure 8As can be seen from Table 1, by providing a plurality of branches 1102, the length of the main body 1101 can be effectively reduced, that is, the lateral dimension of the inner conductor unit is reduced, which is conducive to reducing the lateral dimension of the cavity 101 of the outer conductor unit 10, thereby reducing the lateral dimension of the microwave heating assembly 1, thus promoting the reduction of both the longitudinal dimension and the lateral dimension of the microwave heating assembly 1, and thus promoting the reduction of the overall dimension of the microwave heating assembly 1. In this way, it is more conducive to the miniaturization of the aerosol generating device.

[0062] Furthermore, as Figure 4 shown, at least one branch 1102 may have a bending angle. After each branch 1102 is bent, it is more conducive to reducing its longitudinal dimension or lateral dimension. Taking the orientation in Figure 4 as a reference example, when each branch 1102 is bent by 90° once, it is regarded as having a bending angle of 90°. Compared with its unbent longitudinal state, the longitudinal dimension of the branch 1102 with a 90° bending angle can be reduced; when each branch 1102 is continuously bent by 90° twice, it is regarded as being bent by 180°, that is, having a bending angle of 180°. The state of each branch 1102 at a 180° bending angle has a smaller lateral dimension compared to its state at a 90° bending angle. Therefore, by adjusting the bending angle of each branch 1102, the lateral dimension and longitudinal dimension of the branch 1102 can be adjusted to a certain extent.

[0063] Furthermore, as Figure 4 shown, the probe segment 11a may also have a bending angle, and the bending angle is greater than 0° and less than or equal to 180°. As Figure 4 shown, in the first embodiment, the probe segment 11a is a slender column and has a bending angle of 180°. As Figure 6 shown in the second embodiment, the probe segment 11a has a bending angle of 90°. At this time, one segment of the probe segment 11a is parallel to the extending direction of the longitudinal axis y, and the other segment is perpendicular to the extending direction of the longitudinal axis y. Of course, the probe segment 11a may also not have a bending angle but be a longitudinal column. At this time, the entire probe segment 11a is parallel to the extending direction of the longitudinal axis y. After the probe segment 11a is bent, it is convenient to arrange its end (the end far from the impedance matching segment 11b) on one side of the longitudinal axis y direction close to the bottom surface of the accommodating area in the accommodating area of the cavity 101. The bottom surface of the accommodating area of the cavity 101 may refer to the surface in the accommodating area of the cavity 101 that contacts the bottom surface of the aerosol generation matrix. The end of the probe segment 11a is the area with the most concentrated energy and the largest electric field strength on the probe segment 11a. Therefore, the area of the aerosol generation matrix corresponding to the end of the probe segment 11a is the area with a higher temperature and more likely to be charred. As Figure 4As shown, after the probe segment 11a is bent, its end is closer to the bottom surface of the accommodation area of the cavity 101 than the other parts except the end. In this way, the heating high-temperature area of the aerosol generation matrix is set at its bottom, which is more conducive to achieving uniform heating and reducing the risk of local scorching.

[0064] As Figure 4 shown in the first embodiment, each branch 1102 has a bending angle of 180°. As Figure 9 shown in the third embodiment, each branch 1102 has a bending angle of 90°. The bending angle is not limited to 90°, and can also be greater than 90° or less than 90°. As Figure 10 shown in the fourth embodiment, one of the branches 1102 has a bending angle of 128°. As Figure 11 shown in the fifth embodiment, one of the branches 1102 has a bending angle of 60°. Therefore, the bending angle of each branch 1102 can be determined according to actual needs. The bending angle should be greater than 0° and less than or equal to 180°.

[0065] The number of branches 1102 can be one, two, three, four, etc. For example Figure 7 shown in the middle embodiment, the number of branches 1102 is one. As Figure 7 shown in the left embodiment, the number of branches 1102 is two. As Figure 7 and Figure 8 shown, on the basis of the constant length of the main body 1101, as the number of branches 1102 increases, the resonant frequency decreases accordingly. Therefore, the number of branches 1102 can be adjusted to help the aerosol generating device reach the designed operating frequency.

[0066] Furthermore, as Figure 4 、 Figures 9 to 11 shown, when the number of branches 1102 is at least two, the heights h of at least two branches 1102 can be unequal. The height h of the branch 1102 can refer to the maximum dimension that the branch 1102 extends away from the main body 1101, or can also refer to the maximum distance between the branch 1102 and the main body 1101.

[0067] Furthermore, along the direction of the probe segment 11a close to the inner conductor unit 11, the heights h of at least two branches 1102 can increase or decrease one by one. As Figure 4 、 Figures 9 to 11 shown in the embodiment, along the direction close to the probe segment 11a, the heights h of the two branches 1102 increase one by one, so as to adapt to the gradual transition of impedance matching. As Figure 12 shown in the sixth embodiment, along the direction of the probe segment 11a close to the inner conductor unit 11, the heights h of the two branches 1102 decrease one by one.

[0068] The height h of each branch 1102 can also be equal. As Figure 13 shown in the seventh embodiment, the height h of each branch 1102 is equal. Please refer to Figure 14 , Figure 14 The left side of [reference document] shows the electric field intensity distribution diagram of the first embodiment of the present invention. The main body 1101 of the impedance matching section 11b has two branches 1102 with gradually increasing heights h. Figure 14 The right side of [reference document] shows the electric field intensity distribution diagram of the seventh embodiment of the present invention. The main body 1101 of the impedance matching section 11b has two branches 1102 with equal heights h. The lengths of the main bodies 1101 of the impedance matching sections 11b in the first embodiment and the seventh embodiment are comparable. That is, based on the branch 1102 with the largest height h in the first embodiment shown on the left, after adjusting the heights h of the two branches 1102 to be the same, the two branches 1102 with equal heights h in the seventh embodiment shown on the right are formed. It can be seen that the area of the white highlighted region around the inner conductor unit 11 increases, that is, the electric field intensity increases. From this, it can be deduced that as the height h of the branch 1102 increases, the electric field intensity increases, the microwave energy increases, and the heating efficiency improves. It can be seen that by changing the height h of the branch 1102, the heating efficiency of the aerosol generating device can be adjusted.

[0069] Another example is Figure 4 shown, the main body 1101 of the impedance matching section 11b has a tapered section 1103. The height of this tapered section 1103 (this height can be referred to the height h direction of the branch 1102) gradually decreases along the direction close to the probe section 11a. The purpose of this tapered section 1103 is similar to that of the gradually increasing height h of the branch 1102, so as to adapt to the gradual transition of impedance matching.

[0070] Such as Figure 3As shown, in the first embodiment, a microwave feed hole 104 communicating with the cavity 101 is provided on the outer conductor unit 10. The microwave feed unit is connected to the inner conductor unit 11 through the microwave feed hole 104. The microwave feed unit can be a coaxial connector, which is connected to the microwave generating unit and feeds the microwave generated by the microwave generating unit into the cavity 101. Specifically, the microwave feed unit may include a radio frequency connector 12, which is threadedly connected or flange-connected to the microwave feed hole 104, so that the radio frequency connector 12 makes direct ohmic contact with the outer conductor unit 10 and also makes direct ohmic contact with the inner conductor unit 11, enabling the microwave generated by the device body of the microwave feed unit to be transmitted into the cavity 101 through the microwave feed hole 104. The radio frequency connector 12 can be a standard SMP-JYD radio frequency connector. At the same time, the radio frequency connector 12 is in close contact with the outer conductor unit 10 to seal the microwave feed hole 104 and prevent the microwave from leaking from the microwave feed hole 104 to the outside, resulting in circuit failure.

[0071] As Figure 3 shown, in the first embodiment, the outer conductor unit 10 includes a bottom wall 102 extending laterally and two side walls 103 connected to both ends of the bottom wall 102. The two side walls 103 and the bottom wall 102 together enclose and define the cavity 101, and the outer conductor unit 10 is in a form with one end open and one end closed.

[0072] As Figure 3 shown, in the first embodiment, the microwave feed hole 104 is arranged longitudinally outside the accommodating area of the cavity 101. That is, the direction in which the radio frequency connector 12 is inserted into the microwave feed hole 104 is consistent with the extending direction of the longitudinal axis y of the accommodating area of the cavity 101. The microwave feed hole 104 penetrates through the bottom wall 102 of the outer conductor unit 10.

[0073] Furthermore, as Figures 15 to 17 shown, in the eighth embodiment, different from the first embodiment, the microwave feed hole 104 is arranged transversely outside the accommodating area of the cavity 101. That is, the direction in which the radio frequency connector 12 is inserted into the microwave feed hole 104 is perpendicular to the longitudinal axis y. The microwave feed hole 104 penetrates through the side wall 103 of the outer conductor unit 10. At the same time, the main body 1101 of the impedance matching section 11b has at least one bending angle. As Figure 17 shown, in this embodiment, the main body 1101 of the impedance matching section 11b is an elongated cylinder, and the main body 1101 is bent once, having a 90° bending angle, so that the end of the main body 1101 away from the probe section 11a extends longitudinally, thereby reducing the lateral dimension of the inner conductor unit 11. The bending angle of the main body 1101 can be set with reference to the bending angle of the above-mentioned stub 1102 and will not be elaborated here.

[0074] Please refer to Figure 3and Figure 18 , Figure 18 is a schematic exploded view of the microwave heating assembly 1 of the first embodiment. In the first embodiment, the microwave heating assembly 1 further includes a first fixing seat 141 for accommodating the aerosol generating substrate. The first fixing seat 141 is disposed in the cavity 101 of the outer conductor unit 10, and the first fixing seat 141 further has a first accommodating cavity. The accommodating area of the cavity 101 is located in the first accommodating cavity of the first fixing seat 141. Specifically, as described above, the accommodating area of the cavity 101 is the space of the cavity 101 occupied when the aerosol generating substrate is placed in the cavity 101. That is, the size of the accommodating area of the cavity 101 is consistent with the volume of the aerosol generating substrate inserted into the cavity 101. The volume of the accommodating area of the cavity 101 may be less than or equal to the volume of the first accommodating cavity of the first fixing seat 141. The first fixing seat 141 can be used to accommodate the aerosol generating substrate to prevent the aerosol generating substrate from contaminating the components in the cavity 101 of the outer conductor unit 10. Preferably, the first fixing seat 141 can be detachably connected to the outer conductor unit 10 to facilitate taking out the first fixing seat 141 for cleaning and replacement. In addition, after a part of the space is formed between the aerosol generating substrate and the inner wall surface of the first fixing seat 141, an air inlet channel can be formed to reduce the suction resistance and lower the temperature of the aerosol.

[0075] As Figure 3 and Figure 18 shown, in the first embodiment, the microwave heating assembly 1 further includes a second fixing seat 142 for fixing the inner conductor unit 11. The second fixing seat 142 is also disposed in the cavity 101 and is located outside the accommodating area of the cavity 101. Specifically, when the main body 1101 is arranged horizontally outside the accommodating area of the cavity 101, the second fixing seat 142 is also arranged horizontally outside the accommodating area of the cavity 101; when the main body 1101 is arranged vertically outside the accommodating area of the cavity 101, the second fixing seat 142 is also arranged vertically outside the accommodating area of the cavity 101. As Figure 18 shown, the shape of the second fixing seat 142 is adapted to the overall shape of the inner conductor unit 11 and has a groove. At least a part of the inner conductor unit 11 is placed in the groove so that the inner conductor unit 11 can be relatively fixed in the cavity 101.

[0076] Please refer to Figure 1 and Figure 18 , in the first embodiment, the outer conductor unit 10 further includes a first part 10a (the right part in the figure) and a second part 10b (the left part in the figure) that are connected. Please refer to Figure 3, the first part 10a and the second part 10b of the outer conductor unit 10 are respectively L-shaped, that is, the first part 10a and the second part 10b respectively have a bottom wall and a side wall connected to the bottom wall. The bottom walls of the first part 10a and the second part 10b together form the bottom wall 102 of the outer conductor unit 10. One side wall 103 of the outer conductor unit 10 is the side wall of the first part 10a of the outer conductor unit 10, and the other side wall 103 of the outer conductor unit 10 is the side wall of the second part 10b of the outer conductor unit 10. The microwave feeding hole 104 penetrates the bottom wall of the second part 10b of the outer conductor unit 10.

[0077] The accommodating area for accommodating the aerosol generating matrix in the cavity 101 is formed in the first part 10a of the outer conductor unit 10. The inner conductor unit 11 is disposed in the second part 10b of the outer conductor unit 10. Specifically, the second fixing seat 142 is disposed in the second part 10b of the outer conductor unit 10, that is, the inner conductor unit 11 is disposed in the second part 10b of the outer conductor unit 10 through the second fixing seat 142. The first part 10a and the second part 10b of the inner conductor unit 11 can be detachably connected together, whereby it is convenient to install the second fixing seat 142, that is, it is convenient to install the inner conductor unit 11.

[0078] Both the first fixing seat 141 and the second fixing seat 142 can be made of polytetrafluoroethylene, PEEK, quartz, alumina ceramic or composite wave-transparent material.

[0079] For other technical features not mentioned in each of the embodiments described in the text, reference can be made to any other embodiment or set by combining multiple other embodiments.

[0080] It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be construed as a limitation on the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention should fall within the scope covered by the claims of the present invention.

Claims

1. A microwave heating component (1), characterized in that, It includes an outer conductor unit (10), a cavity (101) defined by the outer conductor unit (10), and an inner conductor unit (11) disposed in the cavity (101); The cavity (101) includes a receiving area for accommodating an aerosol - generating substrate; the receiving area has a longitudinal axis (y) and a transverse direction intersecting the longitudinal axis (y), and the aerosol - generating substrate is loaded into the receiving area along the longitudinal axis (y); At least a part of the inner conductor unit (11) is located outside the transverse direction of the receiving area, and it includes a connected probe section (11a) and an impedance - matching section (11b); At least a part of the extending direction of the probe section (11a) is parallel to the longitudinal axis (y); The impedance - matching section (11b) includes a main body (1101), and the extending direction of the main body (1101) intersects the longitudinal axis (y).

2. The microwave heating component (1) according to claim 1, characterized in that, The impedance - matching section (11b) further includes at least one stub (1102) angularly connected to the main body (1101).

3. The microwave heating component (1) according to claim 2, characterized in that, At least one of the stubs (1102) has a bending angle.

4. The microwave heating component (1) according to claim 3, characterized in that, At least one of the stubs (1102) includes a connected first part (11021) and a second part (11022), the first part (11021) is angularly connected to the main body (1101), the second part (11022) is bent relative to the first part (11021), and the second part (11022) is closer to the probe section (11a) relative to the first part (11021), and the bending angle is formed between the first part (11021) and the second part (11022).

5. The microwave heating component (1) according to claim 2, characterized in that, The number of the stubs (1102) is at least two, and at least two of the stubs (1102) have unequal heights.

6. The microwave heating component (1) according to claim 5, characterized in that, Along the direction close to the probe section (11a) of the inner conductor unit (11), the heights of the respective stubs (1102) increase or decrease one by one.

7. The microwave heating component (1) according to claim 1, characterized in that, The probe section (11a) has a bending angle; and / or, the main body (1101) has a bending angle.

8. The microwave heating component (1) according to any one of claims 1 to 7, characterized in that, The outer conductor unit (10) includes a connected side wall (103) and a bottom wall (102), and the side wall (103) and the bottom wall (102) together enclose and define the cavity (101); the extending direction of the side wall (103) is parallel to the longitudinal axis (y), and a microwave feeding hole (104) communicating with the cavity (101) is provided on the side wall (103); and / or, the microwave heating assembly (1) further includes a first fixing seat (141) for accommodating the aerosol - generating substrate, the first fixing seat (141) is disposed in the cavity (101) and has a first accommodating cavity; the receiving area is located in the first accommodating cavity; and / or, the microwave heating assembly (1) further includes a second fixing seat (142) for fixing the inner conductor unit (11), the second fixing seat (142) is disposed in the cavity (101) and is arranged along the transverse direction outside the receiving area.

9. The microwave heating component (1) according to any one of claims 1 to 7, characterized in that, The lateral direction of the accommodating area is perpendicular to the longitudinal axis (y). And / or, the extending direction of the main body (1101) is perpendicular to the longitudinal axis (y).

10. An aerosol generating device, characterized in that, It includes a microwave generating unit and the microwave heating assembly (1) according to any one of claims 1 to 9. The microwave heating assembly (1) further includes a microwave feeding unit connected between the outer conductor unit (10) and the microwave generating unit. The microwave feeding unit feeds the microwave generated by the microwave generating unit into the cavity (101) of the outer conductor unit (10).

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