Aerosol generating device and microwave heating assembly

Abstract

The present invention relates to an aerosol generating device and a microwave heating assembly, the microwave heating assembly comprising: an outer conductor unit, the inner side of which defines a cavity, the cavity comprising an open end and a bottom end; a first accommodating area is formed on the inner side of the cavity; the inner conductor unit comprises a base material layer, a radiation layer and a feed layer; the base material layer comprises a first surface facing the first accommodating area and a second surface opposite to the first surface; the first surface comprises a first edge arranged towards the opening end and a second edge arranged towards the bottom end; the radiation layer is arranged on the first surface and connected with the bottom end, a gap is formed in the face, facing the first containing area, of the radiation layer, and the gap extends between the first edge and the second edge to form a microwave radiation area; the feed layer is arranged on the second surface and at least partially overlaps with the projection of the gap on the second surface. The microwave heating assembly can improve the preheating efficiency and the aerosol generation speed.

Description

Technical Field

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

[0002] Currently, the heating temperature of the heat-not-burn technology is generally between 250°C and 350°C. Compared with ordinary combustible aerosol generating matrices, the heat-not-burn aerosol generating matrix can significantly reduce the release of harmful substances in the medium while retaining the taste of traditional aerosol generating matrices. The microwave heating technology is applied to aerosol generating devices. The aerosol generating device using the microwave heating technology has the advantages of high heating efficiency and fast aerosol generation.

[0003] Currently, the inner conductor unit in the aerosol generating device is in the shape of a vertical single needle, and the energy is from bottom to top, forming a strong electric field area near the terminal in the cavity to heat the aerosol generating matrix. Its preheating time is long and it is easy to cause a slow aerosol generation speed. In addition, under the limitation of the same feeding power, in order to achieve instant start and stop, small-range local heating needs to be carried out; in addition, the overall length of the inner conductor unit is not conducive to the overall miniaturization of the aerosol generating device. Summary of the Invention

[0004] The object of the present invention is to provide an improved aerosol generating device and a microwave heating component.

[0005] The technical solution adopted by the present invention to solve its technical problems is: to construct a microwave heating component, including:

[0006] An outer conductor unit, with a cavity defined inside, the cavity including an open end and a bottom end opposite to the open end; a first accommodating area for accommodating the aerosol generating matrix is formed inside the cavity;

[0007] An inner conductor unit, including a base material layer, a radiation layer, and a feeding layer; the base material layer includes a first surface facing the first accommodating area and a second surface opposite to the first surface; the first surface includes a first edge facing the open end and a second edge facing the bottom end; the radiation layer is disposed on the first surface, connected to the bottom end, and a slit is provided on the surface facing the first accommodating area, and the slit extends between the first edge and the second edge to form a microwave radiation area; the feeding layer is disposed on the second surface and at least partially overlaps with the projection of the slit on the second surface.

[0008] In some embodiments, the slot includes a first section and a second section; the first section includes a first end and a second end disposed opposite to the first end; the first end faces the open end; the second section is connected to the second end, and the minimum width of the second section is greater than or equal to the width at the second end.

[0009] In some embodiments, the first end is aligned with the first edge.

[0010] In some embodiments, the feeding layer includes a coupling section and a virtual short section;

[0011] The coupling section and the projection of the slot on the second surface at least partially overlap;

[0012] The virtual short section is connected to one end of the coupling section.

[0013] In some embodiments, the feeding layer further includes an impedance matching section;

[0014] The second surface includes a third edge and a fourth edge; the third edge is located in the cavity, and the fourth edge is located outside the cavity;

[0015] The impedance matching section extends from the fourth edge towards the third edge, and includes a first port and a second port disposed opposite to each other. The first port has a set distance from the projection of the first edge on the second surface;

[0016] The coupling section includes a third port and a fourth port disposed opposite to each other. The third port is connected to the second port; the virtual short section is connected to the fourth port.

[0017] In some embodiments, in the extending direction of the impedance matching section, the minimum width of the virtual short section is greater than or equal to the width of the fourth port of the coupling section.

[0018] In some embodiments, the coupling section and the projection of the slot on the second surface are perpendicularly intersected.

[0019] In some embodiments, a second accommodating area is formed in the cavity. The second accommodating area is in communication with the first accommodating area, and the axes of the second accommodating area and the first accommodating area are parallel;

[0020] The inner conductor unit is disposed in the second accommodating area.

[0021] The present invention also constructs an aerosol generating device, including the microwave heating component and the microwave feeding unit described in the present invention; the microwave feeding unit is connected to the inner conductor unit of the microwave heating component.

[0022] In some embodiments, the microwave feeding unit includes an outer conductor and an inner conductor; the outer conductor is sleeved on the outer periphery of a part of the inner conductor, and the two are coaxially arranged;

[0023] The inner conductor is connected to the feeding layer of the inner conductor unit;

[0024] The outer conductor is connected to the radiation layer of the inner conductor unit.

[0025] Implementing the aerosol generating device and microwave heating component of the present invention has the following beneficial effects: By arranging the radiation layer of the inner conductor unit on the first surface of the base material layer of the inner conductor unit, connecting the radiation layer to the blocking end, providing a gap on the side facing the first accommodating area, and extending the gap between the first edge and the second edge to form a microwave radiation area, and then arranging a feeding layer on the second surface of the base material layer that at least partially overlaps with the projection of the gap on the second surface, the preheating efficiency and the speed of generating aerosol can be improved, achieving instant start and stop, better meeting the user's demand of "zero waiting", and being beneficial to the overall miniaturization of the aerosol generating device. Description of the Drawings

[0026] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0027] Figure 1 is a partial structural schematic diagram of the aerosol generating device in the first embodiment of the present invention;

[0028] Figure 2 is Figure 1 a partial structural cross-sectional view of the aerosol generating device shown;

[0029] Figure 3 is Figure 2 a structural schematic diagram of the outer conductor unit in the aerosol generating device shown;

[0030] Figure 4 is Figure 2 a structural schematic diagram of the fixing unit in the aerosol generating device shown;

[0031] Figure 5 is Figure 2 a cooperation schematic diagram of the inner conductor unit and the microwave feeding unit in the aerosol generating device shown;

[0032] Figure 6 is Figure 5 another angle cooperation schematic diagram of the cooperation between the inner conductor unit and the microwave feeding unit shown;

[0033] Figure 7 is Figure 2 a structural schematic diagram of the inner conductor unit in the aerosol generating device shown;

[0034] Figure 8 is Figure 7 Another perspective structural schematic diagram of the inner conductor unit in the aerosol generating device shown;

[0035] Figure 9 is Figure 1 Comparison diagram of the microwave heating component of the aerosol generating device shown and the electric field cloud diagram of the aerosol generating device in the related art;

[0036] Figure 10 Partial structural schematic diagram of the gap of the inner conductor unit in the aerosol generating device in the second embodiment of the present invention;

[0037] Figure 11 Partial structural schematic diagram of the gap of the inner conductor unit in the aerosol generating device in the third embodiment of the present invention;

[0038] Figure 12 Partial structural schematic diagram of the feeding layer of the inner conductor unit in the aerosol generating device in the fourth embodiment of the present invention;

[0039] Figure 13 Partial structural schematic diagram of the feeding layer of the inner conductor unit in the aerosol generating device in the fifth embodiment of the present invention. Detailed implementation manners

[0040] 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. In the following description, it should be understood that the orientation or positional relationships indicated by "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are specific orientations for construction and operation, only for the convenience of describing the technical solution, rather than indicating that the device or element referred to must have a specific orientation, and thus should not be construed as a limitation of the present invention.

[0041] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When a component is referred to as "on" or "under" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Figure 1 A first embodiment of the aerosol generating device of the present invention is shown. The aerosol generating device can generate aerosol for the user to inhale by feeding microwave to heat the aerosol generating substrate. The aerosol generating substrate can be detachably arranged in the aerosol generating device. In some embodiments, the aerosol generating substrate is columnar. Specifically, the aerosol generating substrate can be cylindrical and can be a solid material in the form of filaments, granules or flakes made of leaves, flowers and / or stems of plants, and aroma components can be further added to the solid material.

[0043] As Figure 1 shown, in this embodiment, the aerosol generating device can include a housing (not shown), a microwave heating component and a microwave generating unit (not shown). The microwave heating component is housed in the housing (not shown) and is used to generate microwave to form an energy field inside after accessing microwave, and then heat the aerosol generating substrate. The microwave generating unit (not shown) can be connected to the microwave heating component and is used to feed microwave.

[0044] As Figures 1 to 2 shown, in this embodiment, the microwave heating component can include an outer conductor unit 10 and an inner conductor unit 30. The inner conductor unit 30 is at least partially arranged in the outer conductor unit 10 and can access microwave into the outer conductor unit 10, so that microwave can be generated in the outer conductor unit 10 to form an energy field, and then microwave resonance can be used to heat the aerosol generating substrate.

[0045] As Figure 3As shown, in some embodiments, the outer conductor unit 10 is processed from a metallic material or other highly conductive materials. Exemplarily, the outer conductor unit 10 can be made of gold, silver, copper, aluminum, iron, gold-containing alloys, aluminum-containing alloys, copper-containing alloys, iron-containing alloys, or stainless steel, etc., or the outer conductor unit includes a substrate layer made of a non-metallic material and a metallic coating coated on the inner surface of the substrate layer. In this embodiment, the outer conductor unit 10 can be processed from an aluminum alloy.

[0046] In this embodiment, the outer conductor unit 10 has a cylindrical structure, and its cross-section can be generally square. Of course, it can be understood that in some other embodiments, the cross-section of the outer conductor unit 10 is not limited to being square, and can be circular or irregular. In some embodiments, the outer conductor unit 10 may include a bottom end 10a and an open end 10b; the bottom end 10a and the open end 10b are oppositely arranged. The open end 10b can be used for loading the aerosol generating substrate. The bottom end 10a can be closed by providing a end wall 12.

[0047] In this embodiment, a cavity 11 is defined inside the outer conductor unit 10. The cavity 11 can be used for at least partially loading the inner conductor unit 30 and feeding microwaves. The cavity 11 can be located between the bottom end 10a and the open end 10b, that is, the bottom end 10a and the open end 10b are located at both ends of the cavity 11. The cavity 11 can be generally cuboid-shaped. It can be understood that in some other embodiments, the cavity 11 is not limited to being cuboid-shaped, and can be cylindrical or other shapes. It can play an electromagnetic shielding role, and its height can be greater than the height of the inner conductor unit 30. The part of the space in the cavity 11 that is higher than the inner conductor 30 can serve as a cutoff waveguide to reduce electromagnetic leakage. In some embodiments, the outer conductor unit 10 includes an end wall 12, and the end wall 12 is located at the bottom end 10a. An installation through hole 121 is provided on the end wall 12, and the installation through hole 121 can be used for the inner conductor unit 30 to pass through and be installed.

[0048] As Figure 2 and Figure 4 shown, in this embodiment, the microwave heating assembly further includes a fixing unit 20. The fixing unit 20 is disposed in the cavity 11 and can be used for fixing the aerosol generating substrate. The cross-section of the fixing unit 20 is generally square, and its cross-sectional shape and size can be adapted to the cross-sectional shape and size of the cavity 11. In some other embodiments, the fixing unit 20 can be omitted.

[0049] In this embodiment, the fixing unit 20 can be made of a lossless or low-loss dielectric material. Exemplarily, the fixing unit 20 is made of Teflon, PEEK, quartz, alumina ceramic, or various composite wave-transparent materials, etc. It can ensure that the relative position of the aerosol generation matrix and the inner conductor unit 30 remains unchanged during heating, and the fixing unit 20 can ensure the consistency and stability of heating. At the same time, it can effectively prevent the aerosol generation matrix from leaking onto the microwave heating component, resulting in the failure of the microwave heating component, and it is also convenient for users to clean the oil stain pollution caused by repeated suction.

[0050] In this embodiment, the fixing unit 20 may include a bottom wall 21, a first side wall 221, a second side wall 222, a third side wall 223, and a fourth side wall 224. An air inlet hole 211 is provided on the bottom wall 21 for allowing external gas to enter the inside of the fixing unit 20 to carry away the aerosol generated by the atomization of the aerosol generation matrix. The first side wall 221 and the third side wall 223 are oppositely arranged, the second side wall 222 and the fourth side wall 224 are oppositely arranged, and the first side wall 221, the second side wall 222, the third side wall 223, and the fourth side wall 224 are located on the outer periphery of the bottom wall 221 and are connected to each other. In some embodiments, an accommodation cavity 23 is formed inside the fixing unit 20. The two ends of the accommodation cavity 23 are correspondingly arranged with the open end 10b and the bottom end 10a, and it is communicated with the open end 10b. The accommodation cavity 23 can be surrounded by the first side wall 221, the third side wall 223, and the fourth side wall 224. It can be a columnar cavity, which can be used to accommodate the aerosol generation matrix. A notch 2221 is provided on one side of the second side wall 222. The notch 2221 can extend along the axial direction of the fixing unit 20, and an accommodation groove 24 can be defined inside the notch 2221. The accommodation groove 24 can be used to accommodate the inner conductor unit 30. A partition 225 is provided between the accommodation groove 24 and the accommodation cavity 23, and a communication port 25 is provided on the partition 225. The accommodation groove 24 is communicated with the accommodation cavity 23 through the communication port 25. In some embodiments, the cavity 11 may include a first accommodation area 11a for accommodating the aerosol generation matrix and a second accommodation area 11b for accommodating the inner conductor unit 30; wherein the first accommodation area 11a is formed in the accommodation cavity 23. The second accommodation area 11b is formed in the accommodation groove 24. The first accommodation area 11a and the second accommodation area 11b can be communicated with each other, and the axes of the first accommodation area 11a and the second accommodation area 11b are parallel to each other.

[0051] As Figures 5 to 8 shown, in this embodiment, the inner conductor unit 30 is integrally sheet-shaped. It can be longitudinally arranged and penetrate into the cavity 11 through the installation through hole 121, specifically extending into the accommodation groove 24, and it is oppositely arranged with the communication port 25.

[0052] In this embodiment, the inner conductor unit 30 may include a substrate layer 31, a radiation layer 32, and a feeding layer 33. The substrate layer 31 can be used to carry the radiation layer 32 and the feeding layer 33, and can isolate the feeding layer 33 and the radiation layer 32. In some embodiments, the substrate layer 31 may include a first surface 311 and a second surface 312 arranged opposite to each other, where the first surface 311 may face the first accommodating area 11a. The radiation layer 32 may be disposed on the first surface 311 and may be connected to the bottom end 10a for radiating microwaves into the first accommodating area 11a. The feeding layer 33 may be disposed on the second surface 312 for feeding microwaves.

[0053] In this embodiment, the substrate layer 31 is in a sheet shape and may be an insulating material or a non-conductive material for isolating the feeding layer 33 and the radiation layer 32, such as non-metallic materials like polytetrafluoroethylene, epoxy resin, ceramics, or even air. In some embodiments, the substrate layer 31 may include a first portion 31a and a second portion 31b. The first portion 31a may be generally square, and the first portion 31a may be located in the second accommodating area 11b and may extend from the bottom end 10a towards the opening end 10b. The second portion 31b is disposed at one end of the first portion 31a located at the bottom end 10a and may pass through the mounting through hole 121 to the outside of the outer conductor unit 10. The second portion 31b is square, and its width is smaller than the width of the first portion 31a, so that the first portion 31a can partially abut against the end wall 12. In some embodiments, a first through hole 313 and a second through hole 314 may be provided on the second portion 31b, and the first through hole 313 and the second through hole 314 may penetrate from the second surface 312 to the first surface 311. The second through hole 314 may be multiple. Specifically, the second through hole 314 may be four, and the four second through holes 314 may be located on the outer periphery of the first through hole 313.

[0054] In this embodiment, the first surface 311 is formed on the first portion 31a and the second portion 31b and may include a first edge 311a and a second edge 311b. The first edge 311a is located on the first portion 31a and faces the opening end 10b. The second edge 311b may face the bottom end 10b. Specifically, the second edge 311b is located at one end of the second portion 31b away from the first portion 31a.

[0055] In this embodiment, the second surface 312 is parallel to the first surface 311 and may include a third edge 312a and a fourth edge 312b, where the third edge 312a is parallel to the first edge 311a and the fourth edge 312b is flush with the second edge 311b.

[0056] In this embodiment, the radiation layer 32 can be in a sheet shape and can be disposed on the first surface 311 in a stacked or tiled manner. In some embodiments, the radiation layer 32 can be made of a metal material or other highly conductive materials. Exemplarily, the radiation layer 32 is made of gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, or stainless steel, etc. In some other embodiments, the radiation layer 32 can include a matrix of non-metallic material and a metal coating disposed on the matrix. The shape and size of the radiation layer 32 can be commensurate with the shape and size of the first surface 311. The radiation layer 32 can be connected to the bottom end 10b through an ohmic contact with the end wall 12. Specifically, at least one side of the radiation layer 32 can abut against the end wall 12.

[0057] In this embodiment, a slit 321 is provided on the surface of the radiation layer 32 facing the first accommodating area 11a. The slit 321 extends between the first edge 311a and the second edge 311b, and specifically can extend from a set distance away from the second edge 311b towards the first edge 311a. Specifically, the slit 321 can be located on the first part 31a, that is, can be completely located in the second accommodating area 11b, and can be disposed opposite to the communication port 25. In some other embodiments, the slit 321 can also extend from the second edge 311b towards the first edge 311a. The slit 321 can be used to form a microwave radiation area, which can achieve directional and small-range heating of the aerosol-forming substrate, improve the heating efficiency, and thus is conducive to achieving draw-and-stop. In some embodiments, the slit 321 can be formed by hollowing out or shearing on the radiation layer 32.

[0058] In this embodiment, the slit 321 can include a first section 3211 and a second section 3212. The first section 3211 can be in a longitudinal strip shape and can be straight. In some other embodiments, the slit 321 is not limited to including two sections and can be three sections, four sections, etc.

[0059] The first section 3211 can include a first end 321a and a second end 321b. The first end 321a can be disposed towards the open end 10b. Specifically, the second end 321b can be aligned with the first edge 311a, which is beneficial to the miniaturized design of the cavity 11 and can heat the aerosol-forming substrate more evenly. In some other embodiments, the second end 321b of the first section 3211 is not limited to being aligned with the first edge 311a.

[0060] The second section 3212 is a virtual open section, and its function is to achieve a virtual open circuit effect, and then can jointly achieve the purpose of effective energy coupling with the virtual short section 333 in the feeding layer 33. The second section 3212 is connected to the second end 321b, and its minimum width can be greater than the width at the second end 321b. In some embodiments, the second section 3212 can be a shape formed by expanding and hollowing out the second end 321b. In some embodiments, the second section 3212 can be circular. Of course, it can be understood that in some other embodiments, the second section 3212 is not limited to being circular, and can be rectangular, trapezoidal, oval, fan-shaped, a cone gradually expanding away from the second end 321b, or other polygons. In some other embodiments, it can also be a shape formed by combining at least two of the above shapes.

[0061] In this embodiment, the feeding layer 33 can at least partially overlap with the projection of the slot 321 on the second surface 312. Specifically, the feeding layer 33 can perpendicularly intersect with the projection of the slot 321 on the second surface 312. The feeding layer 33 can be made of a metal material or other highly conductive materials. Exemplarily, the feeding layer 33 is made of gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, or stainless steel, etc. In some other embodiments, the feeding layer 33 can include a matrix of non-metallic material and a metal coating provided on the matrix.

[0062] The feeding layer 33 includes an impedance matching section 331, a coupling section 332, and a virtual short section 333 that are connected in sequence. Among them, the impedance matching section 331 can be used for impedance matching, the function of the coupling section 332 is to achieve energy transmission through magnetic field coupling, and the virtual short section 333 can be conducive to achieving effective energy coupling. Of course, it can be understood that in some other embodiments, the impedance matching section 331 can be omitted. When the input impedance at the port of the coupling section 322 does not match the output impedance of the microwave feeding unit 50, the impedance matching section 331 needs to be introduced. If they match, the impedance matching section 331 can be omitted.

[0063] In this embodiment, the impedance matching section 331 may be mostly located on the second part 31b, extending from the fourth edge 312b towards the third edge 312a. The impedance matching section 331 may be strip-shaped and may be arranged parallel to the extension line of the slit 321. It should be noted that impedance matching means that the characteristic impedance of the transmission line is equal to the load impedance in magnitude and in phase. At this time, the energy on the transmission line is transmitted to the load with almost no reflection. In some embodiments, the impedance matching section 331 may include a first port 331a and a second port 331b; the first port 331a and the second port 331b are arranged opposite to each other, wherein the first port 331a is arranged towards the first edge 311a and has a set distance from the projection of the first edge 311a on the second surface 312. The distance from the first port 331a to the projection of the first edge 311a on the second surface 312 is less than the distance from the end of the second section 3212 of the slit 321 away from the second end 3211 to the first edge 311a, that is, it may be arranged higher than the second section 3212. The second port 331b may be flush with the projection of the second edge 311b on the second surface 312.

[0064] In this embodiment, the coupling section 332 may be strip-shaped and may be arranged perpendicular to the impedance matching section 331, and thus may intersect perpendicularly with the projection of the slit 321 on the second surface 312. The coupling section 332 may be arranged higher than the second section 3212 of the slit 321, and the distance between it and the second section 3212 may be designed according to actual needs. In some embodiments, the coupling section 332 may include a third port 332a and a fourth port 332b, and the third port 332a and the fourth port 332b are arranged opposite to each other. Among them, the third port 332a may be connected to the second port 331b.

[0065] In this embodiment, the virtual short circuit section 333 may be connected to the fourth port 332b of the coupling section 332, which can extend the length of the coupling section 332 and achieve an equivalent short circuit effect by using the quarter-wavelength impedance transformation property. In the extending direction of the impedance matching section, the minimum width of the virtual short circuit section 333 may be greater than the width of the fourth port 332b of the coupling section 332, and it may be formed by hollowing out and expanding the fourth port 332b. In some embodiments, the virtual short circuit section 333 may adopt an equivalent quarter-wavelength open stub. For example, the virtual short circuit section 333 may be generally fan-shaped and may be gradually expanded along the direction away from the coupling section 332. In some other embodiments, the virtual short circuit section 333 may not be limited to being fan-shaped and may be rectangular, trapezoidal, circular, elliptical, or other polygons. The virtual short circuit section 333 formed by hollowing out and expanding the fourth port 332b of the coupling section 332 into the above shapes can reduce the overall thickness of the inner conductor unit 30, which is a more preferred method. In some other embodiments, the virtual short circuit section 333 may also be formed by connecting a metal short post to ground near the fourth port 332b (if it is a planar circuit, it is equivalent to a grounded metallized via).

[0066] The inner conductor unit 30 can be manufactured based on planar circuit and PCB technology, enabling lightweight and miniaturization. Moreover, part of the inner conductor unit 30 can extend outside the outer conductor unit 10 and be connected to the microwave feeding unit 50 or directly designed as an integrated body, eliminating the need for the microwave feeding unit 50, making the aerosol generating device less costly and more consistent.

[0067] In this embodiment, the microwave heating assembly further includes a base 40. The base 40 is disposed between the fixing unit 20 and the end wall 12, which can support the fixing unit 20 and is also used for the positioning and installation of the inner conductor unit 30. In some embodiments, the base 40 can be made of lossless or low-loss dielectric materials. Exemplarily, the base 40 is made of Teflon, PEEK, quartz, alumina ceramic, or various composite wave-transparent materials. In some embodiments, the base 40 includes a metal material substrate and a metal coating coated on the metal material substrate. In some other embodiments, the base 40 can be omitted.

[0068] In this embodiment, the aerosol generating device further includes a microwave feeding unit 50. The microwave feeding unit 50 can be connected to the inner conductor unit 30 in the microwave heating assembly. In some embodiments, the microwave feeding unit 50 can be composed of standard or non-standard RF connectors, which can be connected to a microwave generating unit (not shown) for feeding the microwave generated by the microwave generating unit (not shown) into the inner conductor unit 30 and then into the cavity 11 through the inner conductor unit 30. In some embodiments, the microwave feeding unit 50 can include an outer conductor 51 and an inner conductor 52 coaxially arranged with the outer conductor 51. The outer conductor 51 sleeved on a part of the outer periphery of the inner conductor 52 is provided with a connecting column 511 at one end. The connecting column 511 can pass through the second through hole 314 of the base layer 31 to be connected to the radiation layer 32. The inner conductor 52 is located at the central axis of the outer conductor 51 and extends from one end of the outer conductor 51 and is connected to the feeding layer 33. Specifically, it can pass through the impedance matching section 331 to the first through hole 313.

[0069] Figure 9 The comparison effect of the electric field of the microwave heating assembly of the aerosol generating device in this embodiment and that of the aerosol generating device in the related art is shown. Among them, a is the electric field cloud diagram of the microwave heating assembly of the aerosol generating device in the related art, b is a partial enlarged schematic diagram of a; c is the electric field cloud diagram of the microwave heating assembly of the aerosol generating device in this embodiment; d is a partial enlarged schematic diagram of c. By Figure 9 Comparison shows that the electric field in this embodiment is mainly established in the gap 321, which can achieve directional small-range heating and has better uniformity in the longitudinal direction of the cavity 11, effectively improving the electric field uniformity.

[0070] Figure 10 The second embodiment of the aerosol generating device of the present invention is shown. The difference from the first embodiment is that the second section 3212 of the slit 321 can be conical and can be gradually expanded in a direction away from the first section 3211.

[0071] Figure 11 The third embodiment of the aerosol generating device of the present invention is shown. The difference from the first embodiment is that the second section 3212 of the slit 321 can be fan-shaped and can be gradually expanded in a direction away from the first section 3211.

[0072] Figure 12 The fourth embodiment of the aerosol generating device of the present invention is shown. The difference from the first embodiment is that the virtual short section 333 can be circular.

[0073] Figure 13 The fifth embodiment of the aerosol generating device of the present invention is shown. The difference from the first embodiment is that the virtual short section 333 can be formed by arranging a metal column near the fourth port 332b.

[0074] It can be understood that the above embodiments only represent the preferred embodiments of the present invention. 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 shall fall within the scope covered by the claims of the present invention.

Claims

1. A microwave heating component, characterized in that, Comprising: An outer conductor unit (10) that defines a cavity (11) inside, the cavity including an open end (10b) and a bottom end (10a) disposed opposite to the open end (10b); a first accommodation area (11a) for accommodating an aerosol generating matrix is formed inside the bottom cavity (11); An inner conductor unit (30), including a substrate layer (31), a radiation layer (32), and a feeding layer (33); the substrate layer (31) includes a first surface (311) facing the first accommodation area (11a) and a second surface (312) disposed opposite to the first surface (311); the first surface (311) includes a first edge (311a) facing the open end (10b) and a second edge (311b) facing the bottom end (10a); the radiation layer (32) is disposed on the first surface (311), connected to the bottom end (10a), and a gap (321) is provided on a surface facing the first accommodation area (11a), and the gap (321) extends between the first edge (311a) and the second edge (311b) to form a microwave radiation area; The feeding layer (33) is disposed on the second surface (312) and at least partially overlaps with the gap (321) on the second surface (312).

2. The microwave heating component according to claim 1, characterized in that, The gap (321) includes a first segment (3211) and a second segment (3212); the first segment (3211) includes a first end (321a) and a second end (321b) disposed opposite to the first end (321a); the first end (321a) faces the open end (10b); the second segment (3212) is connected to the second end (321b), and the minimum width of the second segment (3212) is greater than or equal to the width at the second end (321b).

3. The microwave heating component according to claim 1, characterized in that, The first end (321a) is aligned with the first edge (311a).

4. The microwave heating component according to claim 1, characterized in that, The feeding layer (33) includes a coupling segment (332) and a virtual short - circuit segment (333); The coupling segment (332) at least partially overlaps with the projection of the gap (321) on the second surface (312); The virtual short - circuit segment (333) is connected to one end of the coupling segment (332).

5. The microwave heating component according to claim 4, characterized in that, The feeding layer (33) further includes an impedance matching segment (331); The second surface (312) includes a third edge and a fourth edge; the third edge is located in the cavity (11), and the fourth edge is located outside the cavity (11); The impedance matching segment (331) extends from the fourth edge (312b) towards the third edge (312a), and includes a first port (331a) and a second port (331b) disposed opposite to each other, and there is a set distance between the projection of the first port (331a) and the first edge (311a) on the second surface (312); The coupling section (332) includes a third port (332a) and a fourth port (332b) which are oppositely arranged. The third port (332a) is connected to the second port (331b); the virtual short section (333) is connected to the fourth port (332b).

6. The microwave heating component according to claim 5, characterized in that, In the extending direction of the impedance matching section (331), the minimum width of the virtual short section (333) is greater than or equal to the width of the fourth port (332b) of the coupling section (332).

7. The microwave heating component according to claim 4, characterized in that, The coupling section (332) and the projection of the slit (321) on the second surface (312) are perpendicularly intersected.

8. The microwave heating component according to claim 1, characterized in that, A second accommodation area (11b) is formed in the cavity (11). The second accommodation area (11b) is communicated with the first accommodation area (11a), and the axes of the second accommodation area (11b) and the first accommodation area (11a) are parallel to each other; The inner conductor unit (30) is arranged in the second accommodation area (11b).

9. An aerosol generating device, characterized in that, It includes the microwave heating component according to any one of claims 1 to 8 and a microwave feeding unit (50); the microwave feeding unit (50) is connected to the inner conductor unit (30) of the microwave heating component.

10. The aerosol generating device according to claim 9, characterized in that, The microwave feeding unit (50) includes an outer conductor (51) and an inner conductor (52); the outer conductor (51) is sleeved on a part of the outer periphery of the inner conductor (52), and the two are coaxially arranged; The inner conductor (52) is connected to the feeding layer (33) of the inner conductor unit (30); The outer conductor (51) is connected to the radiation layer (32) of the inner conductor unit (30).

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