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 outer conductor unit comprising an open end and a closed end; the open end is opposite to the closed end; the inner conductor unit is at least partially arranged in the cavity and extends from the closed end to the open end, one end of the inner conductor unit is connected to the closed end, the inner conductor unit comprises a radiation structure, and the radiation structure comprises a main body part and at least one branch knot; the main body part extends from the closed end or a position away from the closed end by a set distance to the open end, and the branch knot protrudes from the side wall of the main body part. The microwave heating assembly is provided with at least one branch knot, so that longitudinal electric field dispersion can be realized, and the uniformity of the electric field is improved.

Description

Technical Field

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

[0002] At present, the heating temperature of the heat-not-burn technology is generally between 250-350°C. Compared with the ordinary burning aerosol generating matrix, the heat-not-burn aerosol generating matrix can significantly reduce the release of harmful substances in the medium while retaining the taste of the traditional aerosol generating matrix. Microwave heating technology is applied to aerosol generating devices. Aerosol generating devices using microwave heating technology have the advantages of high heating efficiency and fast aerosol generation. The principle of microwave heating aerosol generating devices is generally designed based on a quarter-wavelength coaxial cavity with an open end of the inner conductor unit. After the aerosol generating matrix is ​​added, a strong resonance is formed at a frequency of 2.45GHz, thereby achieving rapid heating of the aerosol generating matrix.

[0003] The inner conductor of the microwave-heated aerosol generating device is in the shape of a vertical single needle. The energy is transmitted from bottom to top, forming a strong electric field area near the terminal located in the cavity to heat the aerosol generating matrix. The defects are: the inner conductor terminal is the antinode point of the standing wave field, the electric field near it is extremely strong, and the electric field decays rapidly away from the terminal, which leads to high temperature of the medium near the inner conductor terminal and low temperature of the medium away from the terminal. When heating, when the medium away from the terminal is heated to a temperature sufficient for atomization, the temperature of the medium near the inner conductor terminal is too high and burns. Summary of the invention

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

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

[0006] An outer conductor unit, the inner side of which defines a cavity, the outer conductor unit comprising an open end and a closed end; the open end is arranged opposite to the closed end;

[0007] The inner conductor unit is at least partially arranged in the cavity, extending from the closed end to the open end, and one end is connected to the closed end, and includes a radiation structure, the radiation structure includes a main body and at least one branch; the branch is protruding from the side wall of the main body.

[0008] In some embodiments, there are multiple branches, and the multiple branches are spaced apart on the main body from the closed end toward the open end.

[0009] In some embodiments, a plurality of the branches are arranged equidistantly.

[0010] In some embodiments, the pitch between a plurality of the branches on a part of the main body portion near the opening end is greater than the pitch between a plurality of the branches on the remaining part of the main body portion.

[0011] In some embodiments, the main body portion extends from the closed end or from a position set at a distance from the closed end towards the opening end;

[0012] And / or, the branches extend in a direction perpendicular to the extending direction of the main body portion.

[0013] In some embodiments, in a direction perpendicular to the extension of the main body portion, the main body portion includes a first side and a second side which are oppositely arranged;

[0014] The branches extend from the first side in a direction perpendicular to the extension of the main body portion;

[0015] And / or, the branches extend from the second side in a direction perpendicular to the extension of the main body portion.

[0016] In some embodiments, the cavity includes a first chamber and a second chamber which are in communication with each other;

[0017] The first chamber and the second chamber are sequentially arranged from the opening end towards the closed end;

[0018] The inner conductor unit extends from the second chamber to the first chamber, and the radiation structure is located in the first chamber.

[0019] In some embodiments, the inner conductor unit further includes an impedance matching structure, the impedance matching structure is located in the second chamber, and is connected to the radiation structure.

[0020] In some embodiments, the microwave heating assembly further includes a fixing base, the fixing base is arranged in the cavity, the fixing base includes a receiving cavity, and the radiation structure penetrates into the receiving cavity.

[0021] The present invention also constructs an aerosol generating device, which includes the microwave heating assembly of the present invention, a microwave feeding unit connected to the inner conductor unit of the microwave heating assembly, and a microwave generating unit connected to the microwave feeding unit.

[0022] Implementing the aerosol generating device and microwave heating component of the present invention has the following beneficial effects: By providing at least one stub on the main body of the radiation structure of the inner conductor unit and protruding the stub from the side wall of the main body, on the one hand, the longitudinal electric field can be dispersed, the uniformity of the electric field can be improved, and local charring of the aerosol generation matrix can be avoided; on the other hand, by providing at least one stub, it is equivalent to loading an equivalent inductance and capacitance on the main body, enabling the height of the inner conductor unit to be shorter at the same resonance frequency, which is conducive to the miniaturization of the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0024] Figure 1 is a schematic diagram of the partial structure of the aerosol generating device in the first embodiment of the present invention;

[0025] Figure 2 is Figure 1 a partial structure cross-sectional view of the aerosol generating device shown;

[0026] Figure 3 is Figure 2 a schematic diagram of the outer conductor unit structure of the microwave heating component in the aerosol generating device shown;

[0027] Figure 4 is Figure 3 a cross-sectional view of the outer conductor unit shown;

[0028] Figure 5 is Figure 2 a schematic diagram of the fixed seat structure of the microwave heating component in the aerosol generating device shown;

[0029] Figure 6 is Figure 2 a schematic diagram of the inner conductor unit structure of the microwave heating component in the aerosol generating device shown;

[0030] Figure 7 is Figure 1 the electric field cloud diagram of the inner conductor unit in the aerosol generating device shown;

[0031] Figure 8 is the electric field cloud diagram of a conventional inner conductor;

[0032] Figure 9 is Figure 1 the reflection curve diagram of the inner conductor unit in the aerosol generating device shown;

[0033] Figure 10 is the reflection curve diagram of a conventional inner conductor;

[0034] Figure 11is a partial structural cross-sectional view of the aerosol generating device shown in the second embodiment of the present invention;

[0035] Figure 12 is Figure 7 a schematic structural diagram of the inner conductor unit of the microwave heating component in the aerosol generating device shown;

[0036] Figure 13 is a partial structural cross-sectional view of the aerosol generating device shown in the third embodiment of the present invention;

[0037] Figure 14 is Figure 9 a schematic structural diagram of the inner conductor unit of the microwave heating component in the aerosol generating device shown;

[0038] Figure 15 is Figure 1 an electric field contour map of the inner conductor unit in the aerosol generating device shown;

[0039] Figure 16 is Figure 15 a partially enlarged schematic diagram of the electric field contour map of the inner conductor unit shown;

[0040] Figure 17 is Figure 13 an electric field contour map of the inner conductor unit in the aerosol generating device shown;

[0041] Figure 18 is Figure 15 a partially enlarged schematic diagram of the electric field contour map of the inner conductor unit shown. Detailed Embodiments

[0042] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments 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", "longitudinal", "transverse", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, with a specific orientation structure and operation, and are only for facilitating the description of the present technical solution, rather than indicating that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0043] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "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. Terms such as "first", "second", "third", etc. are only for the convenience of describing the technical solution of the present invention, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, 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.

[0044] 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.

[0045] As Figure 1 shown, in the present 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 inside to form an energy field after accessing microwave, so as to 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.

[0046] In the present 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.

[0047] As Figures 1 to 4As shown, in this embodiment, the outer conductor unit 10 is processed from a metal material or other highly conductive materials. Exemplarily, the outer conductor unit 10 can be made of gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, stainless steel, etc., or the outer conductor unit includes a base layer made of a non-metallic material and a metal coating coated on the inner surface of the base layer. In this embodiment, the outer conductor unit 10 can be processed from an aluminum alloy.

[0048] In this embodiment, the outer conductor unit 10 has a cylindrical structure and can be an irregular shape. In some other embodiments, the outer conductor unit 10 can be a regular shape, such as a cuboid shape or a cylindrical shape. In this embodiment, the outer conductor unit 10 at least includes a first side wall 101, a second side wall 102, a support wall 103, a third side wall 104, and an end wall 105. Among them, the first side wall 101 and the second side wall 102 are axially connected, non-coaxially arranged, and are arranged in a stepped manner. The support wall 103 is arranged between the first side wall 101 and the second side wall 102, is connected to the first side wall 101 and the second side wall 102, and is perpendicular to the first side wall 101 and the second side wall 102 respectively. The support wall 103 can play a role in fixing and supporting the fixed seat 20 and the inner conductor unit 30. In some other embodiments, the support wall 103 can be omitted. The third side wall 104 is arranged opposite to the first side wall 101 and the second side wall 102, and an installation hole 12 is provided in a section of the third side wall 104 close to the end wall 105 for installing the microwave feeding unit 40. Specifically, in some embodiments, the third side wall 104 can include a flat portion 1041 and a convex portion 1042. The convex portion 1042 is arranged at one end of the flat portion 1041 and protrudes toward the side opposite to the second side wall 102, is arranged in a stepped manner with the flat portion 1041, and is connected to the end wall 105. The installation hole 12 can be specifically provided on the convex portion 1042. The end wall 105 is arranged at one end of the third side wall 104 and the second side wall 102 and is connected to the third side wall 104 and the second side wall 102.

[0049] In this embodiment, a cavity 11 is defined inside the outer conductor unit 10. Specifically, the cavity 11 can be defined by the first side wall 101, the second side wall 102, the support wall 103, the third side wall 104, and the end wall 105. The cavity 11 can accommodate at least a part of the inner conductor unit 30 for microwave feeding. In some embodiments, the outer conductor unit 10 can include a closed end 11a and an open end 11b, and the open end 11b is arranged opposite to the closed end 11a, and the cavity 11 is located between the open end 11b and the closed end 11a. The end wall 105 can be located at the closed end 11a.

[0050] In this embodiment, the cavity 11 may include a first chamber 111 and a second chamber 112 that communicate with each other. The first chamber 111 and the second chamber 112 may be arranged in sequence from the open end 11b to the closed end 11a. The open end 11b is located at one end of the first chamber 111. The support wall 103 is located between the first chamber 111 and the second chamber 112 and is used to separate the first chamber 111 and the second chamber 112. A communication hole 1031 is provided on the support wall 103, and the first chamber 111 and the second chamber 112 communicate through the communication hole 1031. The first chamber 111 and the second chamber 112 are not coaxially arranged, and the axes of the first chamber 111 and the second chamber 112 are parallel to each other. The first chamber 111 may be defined by the first side wall 101, the support wall 103, and a part of the third side wall 104. The second chamber 112 may be defined by the second side wall 102, the end wall 105, and a part of the third side wall 104. Among them, the first chamber 111 may be used for loading the aerosol generation matrix and providing a space for microwave resonance. The second chamber 112 may be used to provide an impedance matching space. In some embodiments, the cavity 11 is not limited to including the first chamber 111 and the second chamber 112. The number of chambers may be one or multiple, and the relative positions are not limited to axial distribution and may also be distributed left and right.

[0051] As Figure 5 shown, in this embodiment, the microwave heating assembly includes a fixed seat 20, which can be installed in the cavity 11. Specifically, the fixed seat 20 is installed in the first chamber 111. The fixed seat 20 can be supported by the support wall 103. The fixed seat 20 can be made of a lossless or low-loss dielectric material. Exemplarily, the fixed seat 20 is made of Teflon, PEEK, quartz, alumina ceramic, various composite wave-transparent materials, etc. It can ensure that the relative positions of the aerosol generation matrix and the inner conductor unit 30 remain unchanged during heating, thereby ensuring the consistency and stability of heating. At the same time, it can effectively prevent the aerosol generation matrix from leaking onto the microwave heating assembly, resulting in the failure of the microwave heating assembly, and it is also convenient for users to clean the oil stain pollution caused by repeated suction.

[0052] In some embodiments, the fixing base 20 may be a cylindrical structure. The fixing base 20 may include a cylinder body 21. The cross-sectional shape and size of the cylinder body 21 may be adapted to the cross-sectional shape and size of the first chamber 111. The cylinder body 21 is a hollow structure with an opening 214 provided at one end, and it may include a bottom wall 211 and an annular wall 212. A plurality of bosses 213 are provided on the side of the bottom wall 211 facing the opening 214. The plurality of bosses 213 are spaced apart, and the spaces between adjacent two bosses 213 may form an air flow channel. The annular wall 212 is provided on the bottom wall 211 and encloses a receiving cavity 22 with the bottom wall 211. The receiving cavity 22 may be used to receive an aerosol generating matrix. The receiving cavity 22 may be a columnar cavity. In some embodiments, the receiving cavity 22 includes a first receiving area 221 and a second receiving area 222 that are spliced and communicate with each other; the axes of the first receiving area 221 and the second receiving area 222 are arranged in parallel. The cross-section of the first receiving area 221 may be generally circular, and the cross-section of the second receiving area 222 is generally semi-circular. The radial dimension of the second receiving area 222 is smaller than that of the first receiving area. Among them, the first receiving area 221 may be used to receive an aerosol generating matrix; the second receiving area 222 may be used for installing part of the inner conductor unit 30. A through hole 2111 is provided at the position of the bottom wall 211 corresponding to the second receiving area 222. The through hole 2111 may be communicated with the communication hole 1031 for the inner conductor unit 30 to pass through.

[0053] As Figure 6 shown, in this embodiment, the inner conductor unit 30 may be made of a metal material or other highly conductive materials. Exemplarily, the inner conductor unit 30 may be made of gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, stainless steel, etc., or the inner conductor unit 30 may include a matrix layer made of a non-metallic material and a metal coating coated on the outer surface of the matrix layer. In this embodiment, the inner conductor unit 30 may be made of stainless steel plated with gold.

[0054] In this embodiment, the inner conductor unit 30 is generally columnar as a whole and may be partially disposed in the cavity 11. The inner conductor unit 30 may extend from the closed end 11a to the open end 11b. The inner conductor unit 30 may extend from the second chamber 112 into the first chamber 111 and sequentially penetrate into the second receiving area 222 of the receiving cavity 22 through the communication hole 1031 and the through hole 2111.

[0055] In this embodiment, the inner conductor unit 30 may include a radiation structure 31 and an impedance matching structure 32. The radiation structure 31 can be used to radiate microwaves, and the impedance matching structure 32 can be used for impedance matching. 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. Both the radiation structure 31 and the impedance matching structure 32 are longitudinally elongated columnar structures, and the cross-sections of both can be rectangular. Of course, it can be understood that in some other embodiments, the cross-sections of the radiation structure 31 and the impedance matching structure 32 are not limited to being square, and can be circular or other shapes. The radiation structure 31 penetrates into the accommodation cavity 22. Specifically, it can be located in the second accommodation area 222. The impedance matching structure 32 can be partially or entirely disposed in the second chamber 112, and one end of it is connected to the radiation structure 31 and can be coaxially arranged with the radiation structure 31. In this embodiment, the radiation structure 31 and the impedance matching structure 32 can be integrally formed. Of course, it can be understood that in some other embodiments, the radiation structure 31 and the impedance matching structure 32 are not limited to being integrally formed and can be connected by plugging. The microwave reflection of the inner conductor unit 30 fed into the cavity 11 is small, which can improve the effect of microwaves acting on the fixing base 20, enabling microwaves to act on the aerosol generating matrix efficiently and quickly, which is beneficial to meeting the user's needs.

[0056] In this embodiment, the radiation structure 31 may include a main body portion 311 and a plurality of branches 312. In some other embodiments, there may also be one branch 312. The main body portion 311 can extend from a position set at a distance from the closed end 11a towards the open end 11b. Specifically, the main body portion 311 can extend from the bottom wall 211 in the accommodation cavity 22 towards the open end 11b. In some other embodiments, the main body portion 311 can extend from the closed end 11a towards the open end 11b. One end of the main body portion 311 can be connected to the impedance matching structure 32. The plurality of branches 312 can be arranged at intervals on the main body portion 311 along the extending direction of the main body portion 311, that is, from the closed end 11a towards the open end 11b, and each branch 312 can protrude from the side wall of the main body portion 311 and can be integrally formed with the main body portion 311. By arranging a plurality of branches 312 at intervals along the extending direction of the main body portion 311, on the one hand, it can achieve longitudinal electric field dispersion to improve the uniformity of the electric field and avoid local charring of the aerosol generating matrix. On the other hand, it is equivalent to loading an equivalent inductance and capacitance on the main body portion 311, enabling the height of the inner conductor unit 30 to be shorter at the same resonant frequency, which is beneficial to the miniaturization of the cavity.

[0057] In this embodiment, the main body 311 may be a columnar structure with a rectangular cross section. Of course, it is understandable that in some other embodiments, the cross section of the main body 311 may not be limited to a rectangular shape. In this embodiment, in a direction perpendicular to the extension of the main body 311, the main body includes a first side 311a and a second side 311b that are arranged opposite to each other, and the first side 311a and the second side 311b may be arranged corresponding to the two edges where the second accommodating area 222 and the first accommodating area 221 meet.

[0058] In this embodiment, a plurality of branches 312 may be arranged equidistantly. Of course, it is understood that in some other embodiments, a plurality of branches 312 may also be arranged non-equidistantly. The cross section of each branch 312 may be roughly rectangular, and the shapes and sizes of two adjacent branches 312 may be arranged identically. Of course, it is understood that in some other embodiments, the cross section of each branch 312 may not be limited to being rectangular, but may also be circular or other shapes. In some other embodiments, at least one branch 312 of the plurality of branches 312 has a different shape and / or size. In some embodiments, each branch 321 may extend in a direction perpendicular to the extension of the main body 311. Specifically, each branch 312 may extend from the first side 311a in a direction perpendicular to the extension of the main body 311, and may extend from the second side 311b in a direction perpendicular to the extension of the main body 311. Of course, it is understood that in some other embodiments, each branch 312 may be arranged on the first side 311a or only on the second side 311b. In some embodiments, each branch 312 may be in a block or sheet shape. Specifically, in the present embodiment, each branch 312 can be a rectangular metal block with a length, width and height of 1 mm. The spacing between two adjacent branches 312 can be 1.5 mm. In the present embodiment, the number of the branches 312 can be five, and they are arranged between 16 mm and 27 mm high in the main body 311. Compared with the length of 31 mm of the quarter-wavelength inner conductor in the related art, the total height of 27 mm of the inner conductor unit 30 in the present embodiment significantly reduces the height of the inner conductor unit 30. In some embodiments, the number, width, height, spacing, etc. of the branches can be any value, and can be evenly distributed or unevenly distributed. The number, width, height and spacing of the multiple branches 312 can be configured according to different application scenarios. By setting the branches 312, a strong electric field area can be formed at the corner position of each branch 312, thereby reducing the electric field extreme value in the aerosol generation matrix, improving the electric field inhomogeneity caused by the round needle inner conductor structure having only one strong electric field area at the terminal, thereby solving the problem of local easy burning of the aerosol generation matrix.

[0059] In this embodiment, the aerosol generating device further includes a microwave feeding unit 40, which can be installed on the side wall of the outer conductor unit 10. The microwave feeding unit 40 can be installed in the mounting hole 12 and can extend into the second chamber 112 to make ohmic contact with the inner conductor unit 30. In some embodiments, the mounting hole 12 can be a threaded hole. In some embodiments, the microwave feeding unit 40 can be composed of a standard or non-standard radio frequency connector, and is embedded in the side wall of the outer conductor unit 10 through threads or flanges. It can be connected to the microwave generating unit and is used to feed the microwave generated by the microwave generating unit into the impedance matching structure 32 of the inner conductor unit 30 and then transmit it to the main body 311 of the radiation structure 31. Along the main body 311, it is transmitted to the branch 321 and then radiates energy to the aerosol generating matrix in the fixing seat 20, so that the aerosol generating matrix can be quickly heated to 250° to 350°, and the generated aerosol enters the human body through the user's suction action.

[0060] In the present invention, the inner conductor unit 30 provided with a plurality of branches 312 has two major benefits:

[0061] A plurality of stronger electric field regions are formed at the angular positions of each branch 312, which can average the electric field distribution in the longitudinal region of the dielectric, thereby improving the problem of uneven longitudinal electric field caused by only one extremely strong electric field position at the end of the inner conductor, avoiding local charring of the dielectric, as shown in the numerical simulation results of the high-frequency electromagnetic simulation software Figure 7 and Figure 8 This theory can be verified.

[0062] At the same time, by configuring the number, height, width and spacing of the branches, etc., additional equivalent capacitance and inductance can be increased and adjusted, effectively reducing the height of the inner conductor unit 30, thereby reducing the volume of the cavity 11.

[0063] The theoretical basis for reducing the height of the inner conductor unit 30 is as follows:

[0064] For a microwave resonant circuit, the resonant frequency f0 can be defined as:

[0065] f0 = 1 / (2π√LC)

[0066] The inner conductor unit 30 loaded with the branch 312 is equivalent to adding additional inductance and capacitance at the end. When the inductance L and capacitance C of the resonant circuit increase, f0 will decrease.

[0067] For the electromagnetic wave wavelength λ, there is also:

[0068] λ = c / f

[0069] The electromagnetic wave wavelength is inversely proportional to the frequency. In order to ensure that the resonant frequency remains unchanged at 2.45 GHz, the working wavelength λ decreases accordingly.

[0070] Therefore, the height of the inner conductor unit 30 of the open coaxial cavity based on the quarter-wavelength inner conductor unit 30 becomes shorter.

[0071] By adjusting the arrangement and density of the stubs 312, the adjustment of the longitudinal electric field distribution in the dielectric can be achieved. The electric field strength is larger where the stubs 312 are densely distributed, and the electric field strength is smaller where the stubs 312 are sparsely distributed. For example, by adopting the arrangement of the stubs 312 with a denser lower part and a sparser upper part, the strong electric field region in the lower part of the dielectric can be increased.

[0072] Table 1 Comparison of Electric Field Simulation Values

[0073]

[0074] As Figures 7 to 10 As well as shown in Table 1, 1) the average peak ratio of the dielectric electric field of the conventional inner conductor unit 30 is as high as 6.97, while the inner conductor unit 30 in the present invention can disperse the electric field through multiple stubs, and the average peak ratio can be greatly reduced to 3.62; 2) the inner conductor unit 30 in the present invention can also reach a similar reflection coefficient level as the conventional inner conductor unit 30, and the energy utilization rate is not reduced.

[0075] Figure 11 And Figure 12 The second embodiment of the present invention is shown, and the difference from the first embodiment is that the cross-section of the main body portion 311 can be approximately circular.

[0076] Figure 13 And Figure 14 The third embodiment of the present invention is shown, and the difference from the first embodiment is that the multiple stubs 312 are arranged at unequal distances, and the distance between the multiple stubs 312 on a part of the main body portion 311 close to the open end 11b can be greater than the distance between the multiple stubs 312 on the remaining part of the main body portion 311, that is, the multiple stubs 312 are arranged with a denser lower part and a sparser upper part. In some other embodiments, the distance between the multiple stubs 312 can also be arranged to increase from the closed end 11a to the open end 11b.

[0077] As Figures 15 to 18 As shown, by adjusting the arrangement, number and density of the stubs 312, the adjustment of the longitudinal electric field distribution in the dielectric can be achieved. For example, by making the distance between the multiple stubs 312 on a part of the main body portion 311 close to the open end 11b greater than the distance between the multiple stubs 312 on the remaining part of the main body portion 311, that is, by adopting the arrangement of the stubs 312 with a denser lower part and a sparser upper part, the strong electric field region in the lower part of the dielectric can be increased.

[0078] It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent for 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 modifications and improvements can also be made, which all fall within 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 outer conductor unit (10) including an open end (11b) and a closed end (11a); the open end (11b) and the closed end (11a) are oppositely arranged; An inner conductor unit (30) that is at least partially disposed in the cavity (11), extends from the closed end (11a) towards the open end (11b), and one end is connected to the closed end (11a), and includes a radiation structure (31), the radiation structure (31) including a main body portion (311) and at least one branch (312); the branch (312) protrudes from the side wall of the main body portion (311).

2. The microwave heating component according to claim 1, characterized in that, There are multiple branches (312), and the multiple branches (312) are spaced apart from the closed end (11a) towards the open end (11b) on the main body portion (311).

3. The microwave heating component according to claim 2, characterized in that, The multiple branches (312) are equidistantly arranged.

4. The microwave heating component according to claim 2, characterized in that, The spacing between the multiple branches (312) on the part of the main body portion (311) near the open end (11b) is greater than the spacing between the multiple branches (312) on the remaining part of the main body portion (311).

5. The microwave heating component according to claim 1, characterized in that, The main body portion (311) extends from the closed end (11a) or from a set distance away from the closed end (11a) towards the open end (11b); And / or, the branch (312) extends in a direction perpendicular to the extending direction of the main body portion (311).

6. The microwave heating component according to claim 1, characterized in that, In the direction perpendicular to the extension of the main body portion (311), the main body portion (311) includes a relatively arranged first side and a second side; The branch (312) extends from the first side in a direction perpendicular to the extension of the main body portion (311); And / or, the branch (312) extends from the second side in a direction perpendicular to the extension of the main body portion (311).

7. The microwave heating component according to claim 1, characterized in that, The cavity (11) includes a first chamber (111) and a second chamber (112) that communicate with each other; The first chamber (111) and the second chamber (112) are sequentially arranged from the open end (11b) towards the closed end (11a); The inner conductor unit (30) extends from the second chamber (112) to the first chamber (111), and the radiation structure (31) is located in the first chamber (111).

8. The microwave heating component according to claim 7, characterized in that, The inner conductor unit (30) further includes an impedance matching structure (32), the impedance matching structure (32) is located in the second chamber (112), and is connected to the radiation structure (31).

9. The microwave heating component according to claim 1, characterized in that, The microwave heating assembly further includes a fixing base (20), the fixing base (20) is disposed in the cavity (11), the fixing base (20) includes a receiving cavity (22), and the radiation structure (31) penetrates into the receiving cavity (22).

10. An aerosol generating device, characterized in that, Including the microwave heating assembly according to any one of claims 1 to 9, a microwave feeding unit (40) connected to the inner conductor unit (30) of the microwave heating assembly, and a microwave generating unit connected to the microwave feeding unit (40).

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