Conductive coil, induction heating assembly, and aerosol generator

Abstract

A conductive coil (1), an induction heating assembly (10) and an aerosol generating device, wherein the conductive coil (1) surrounds the susceptor (4) of the induction heating assembly (10) and is used to generate a changing magnetic field when energized, whereby the susceptor (4) cooperating with the conductive coil (1) generates heat by electromagnetic induction to heat the aerosol generating product (30), the conductive coil (1) includes a conductive ring (11), the conductive ring (11) is used to generate a changing magnetic field when energized, and a filling medium (12) is installed in the conductive ring (11), and the conductivity of the conductive ring (11) is greater than the conductivity of the filling medium (12). The filling medium (12) is air, liquid, or solid. The conductive coil (1) effectively improves the electromagnetic conversion efficiency, reduces the loss of the conductive coil itself, effectively reduces the heat loss of the aerosol generating device, and reduces the power consumption.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims priority from a Chinese patent application with application number 202210813540.6 filed on July 11, 2022, and the entire content of the Chinese patent application is incorporated herein by reference in its entirety.

[0002] This application relates to the field of electronic atomization technology, and particularly to a conductive coil, an induction heating assembly, and an aerosol generating device.

Background Art

[0003] A heat - not - burn aerosol generating device can generate an aerosol by heating a dedicated aerosol - generating product to about 200 - 350 °C. Compared with the conventional method of generating an aerosol by burning an aerosol - generating product, the harmful substances are significantly reduced, the mouthfeel of the aerosol is basically the same, and it has advantages such as safety in use, convenience, health, and environmental protection, attracting people's attention and support.

[0004] Currently, the heating methods of commercially available heat - not - burn aerosol generating devices are mainly resistive heating and electromagnetic heating. The heating principle of resistive heating is to transfer the heat of the heating element to the aerosol - generating product by heat conduction, which improves the baking effect of the aerosol - generating product close to the heating element. The heating principle of electromagnetic heating is mainly to use a conductive coil to generate a changing magnetic field when energized, and a susceptor that cooperates with the conductive coil generates heat by electromagnetic induction to heat the aerosol - generating product.

[0005] However, the drive coil of the electromagnetic - heating aerosol generating device is mainly wound using Litz wire. Not only is the structural fixation complex, but also the loss of the conductive coil itself is large, the electromagnetic conversion efficiency is low, the overall heat loss is large, and the power consumption is high.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The conductive coil, induction heating assembly, and aerosol generating apparatus provided in this application aim to solve the problems of conventional conductive coils, which have high losses, low electromagnetic conversion efficiency, high overall heat loss, and high power consumption. [Means for solving the problem]

[0007] A conductive coil is provided, which is used to generate a magnetic field that changes when energized, thereby causing a susceptor cooperating with the conductive coil to generate heat by electromagnetic induction, thereby heating the aerosol-generating product, the conductive coil includes a conductive ring, which is used to generate a magnetic field that changes when energized, and a filling medium is placed inside the conductive ring, the conductivity of the conductive ring being greater than the conductivity of the filling medium.

[0008] Here, the conductive coil is formed spirally from a single hollow metal wire, the conductive ring is the cross-section of the metal wire, and the conductive ring is extended spirally along the longitudinal direction of the metal wire.

[0009] Here, the ratio of the conductivity of the conductive ring to the conductivity of the filling medium is 10 or more.

[0010] Here, the cross-sectional shape of the conductive ring is annular, elliptical, elliptical, square, polygonal, or semi-annular.

[0011] Here, the thickness of the side wall of the conductive ring is the same everywhere, or the thickness of the side wall of the conductive ring differs at least two locations.

[0012] Here, the distance between adjacent windings of the conductive coil at different axial positions is either the same or not the same at all.

[0013] Here, the filling medium is a fluid.

[0014] Here, the fluid is ambient air and / or an insulating liquid.

[0015] Here, the conductive ring has opposing first and second ports, the fluid flows into the conductive ring from one of the first and second ports and flows out from the other of the first and second ports, or the fluid is sealed within the conductive ring by the seals of the first and second ports.

[0016] Here, the thickness of the side wall of the conductive ring is 0.05 mm to 1.5 mm.

[0017] Here, the packing medium is a solid substrate, and the conductive ring is placed on the outer surface of the substrate.

[0018] Here, the thickness of the side wall of the conductive ring is 0.0008 mm to 1.52 mm.

[0019] To solve the above technical problems, another technical solution employed by this application is as follows: an induction heating assembly is provided, comprising the at least one conductive coil and a susceptor, wherein the susceptor cooperates with the at least one conductive coil to generate heat by electromagnetic induction, the susceptor is used to insert and heat an aerosol-generating product, or the at least one conductive coil is arranged around the susceptor, and the susceptor is used to contain and heat an aerosol-generating product.

[0020] Here, at least one of the conductive coils is installed surrounded by the outer wall surface of the side wall of the susceptor, and an insulating layer is installed between at least one of the conductive coils and the susceptor.

[0021] Here, the insulating layer is formed on the outer wall surface of the susceptor, or the outer wall surface of the side wall of the conductive coil is covered with the insulating layer.

[0022] Here, the number of the conductive coils is plural, and the plural conductive coils are stacked and installed along the axial direction of the susceptor, and are respectively connected to a power supply assembly.

[0023] Here, the induction heating assembly further includes a support assembly. The support assembly has a receiving cavity. The susceptor and at least one of the conductive coils are located in the receiving cavity, and at least one of the conductive coils is installed on the side wall surface of the receiving cavity.

[0024] At least one of the conductive coils is arranged to surround the outer periphery of the susceptor. The susceptor includes a main body portion. The main body portion is arranged at an interval from the support assembly, presents a hollow tubular shape, and is used for accommodating and heating an aerosol generating product.

[0025] Here, the susceptor further includes a connection portion. The first end portion of the main body portion is connected to the support assembly through the connection portion, and the second end portion of the main body portion is installed in a suspended manner.

[0026] Here, the induction heating assembly further includes a base. The support assembly is installed on the base. The second end portion of the main body portion is installed at an interval from the base, or the second end portion of the main body portion is placed on the base.

[0027] Here, the induction heating assembly further includes a magnetic conductor. The magnetic conductor is located on the side away from the susceptor of at least one of the conductive coils, and is used for guiding the magnetic field on the side away from the susceptor of at least one of the conductive coils.

[0028] Here, the material of the magnetic conductor is a soft magnetic alloy. The initial magnetic permeability of the soft magnetic alloy is 50 or more, and its resistivity is 8×10 -6Above Ω·m, or the magnetic conductor is in a strip shape, at least one of the conductive coils is wrapped by the strip-shaped magnetic conductor, or the magnetic conductor is integrally formed and has a hollow shape, at least one of the conductive coils is installed inside the hollow of the magnetic conductor, or the magnetic conductor includes a plurality of magnetic blocks, and the plurality of magnetic blocks form a single hollow structure in combination to accommodate at least one of the conductive coils, or the magnetic conductor is integrally combined with at least one of the conductive coils by powder sintering and functions as a support assembly.

[0029] To solve the above technical problems, another technical solution adopted by this application is as follows. Provide an aerosol generating device, the aerosol generating device includes an induction heating assembly and a power supply assembly, the induction heating assembly is used to heat and atomize an aerosol generating product when energized, the induction heating assembly is the above-mentioned induction heating assembly, the power supply assembly is electrically connected to the induction heating assembly and is used to supply power to the induction heating assembly.

[0030] To solve the above technical problems, another technical solution adopted by this application is as follows. Provide an aerosol generating device. The aerosol generating device includes an aerosol generating product, a susceptor, a conductive coil, and a power supply assembly. Here, the susceptor is arranged inside the aerosol generating product, the conductive coil is used to generate a changing magnetic field when energized, whereby the susceptor generates heat by electromagnetic induction to heat and atomize the aerosol generating product, the conductive coil is the above-mentioned conductive coil, and the power supply assembly is electrically connected to the conductive coil and is used to supply power to the conductive coil.

[0031] The beneficial effects of this application are as follows: Compared to the prior art, the embodiments of this application provide a conductive loop, an induction heating assembly, and an aerosol generating apparatus in which a conductive coil forms a conductive ring, and when energized, generates a changing magnetic field in the conductive ring, causing a susceptor working with the conductive coil to generate heat by electromagnetic induction and heat the aerosol generating product. At the same time, by placing a filling medium inside the conductive ring, the conductivity of the conductive ring is made greater than the conductivity of the filling medium, so that when the conductive coil is energized, more high-frequency current is conducted inside the conductive ring based on the skin effect, and compared to conventional solutions in which the conductive coil is wound using multiple Litz wires, the driving current frequency of the conductive coil provided in this application can be set to a higher frequency, thereby effectively improving the electromagnetic conversion efficiency of the conductive coil, reducing the losses of the conductive coil itself, effectively reducing the heat loss of the aerosol generating apparatus, and reducing power consumption. [Brief explanation of the drawing]

[0032] [Figure 1] This is a schematic diagram of the overall structure of a conductive coil provided by one embodiment of this application. [Figure 2] This is a cross-sectional view of the conductive coil shown in Figure 1, along line AA. [Figure 3] This is a cross-sectional view along AA of another embodiment of the conductive coil shown in Figure 1. [Figure 4] This is a schematic diagram of a structure in which the distance between adjacent windings of a conductive coil is not exactly the same at different axial positions. [Figure 5] This is a radial cross-sectional view of a conductive coil provided by one embodiment of this application. [Figure 6a] This is a cross-sectional view of an induction heating assembly provided by one embodiment of this application. [Figure 6b] This is a schematic diagram showing the distribution of multiple conductive coils. [Figure 7] This is a cross-sectional view of an induction heating assembly provided by another embodiment of the present application. [Figure 8]This is a cross-sectional view of an induction heating assembly provided by yet another embodiment of the present application. [Figure 9] This is a cross-sectional view of an induction heating assembly provided by yet another embodiment of the present application. [Figure 10] This is a schematic diagram of an aerosol generating apparatus provided by one embodiment of this application. [Figure 11] This is a schematic diagram of an aerosol generating apparatus provided by another embodiment of this application. [Modes for carrying out the invention]

[0033] The technical solutions of the embodiments of this application will be described clearly and completely below with reference to the drawings of the embodiments of this application. Clearly, the embodiments described are only a part of, and not all, of, the embodiments of this application. All other embodiments that a person skilled in the art can obtain based on the embodiments of this application without requiring inventive work are all within the scope of protection of this application.

[0034] In this application, terms such as “first,” “second,” and “third” are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance or the number of technical features shown. Accordingly, features defined as “first,” “second,” and “third” may explicitly or implicitly include at least one of those features. In the description of this application, “multiple” means at least two, e.g., two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of this application (e.g., up, down, left, right, front, back…) are used to interpret the relative positional relationships, motion, etc., between each part in a particular orientation (e.g., shown in the drawings), and if that particular orientation changes, the directional indications change accordingly. Furthermore, the terms “include,” “have,” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may further include steps or units that are not selectively listed, or may further include other steps or units specific to those processes, methods, products, or apparatus.

[0035] As used herein, “Embodiments” means that certain features, structures, or characteristics described with reference to an embodiment may be included in at least one embodiment of this application. The occurrence of such phrase in different parts of the specification does not necessarily refer to the same embodiment, nor does it represent mutually exclusive, independent, or alternative embodiments. The embodiments described herein can be combined with other embodiments, as will be explicitly and implicitly understood by those skilled in the art.

[0036] The present application will be described in detail below with reference to the drawings and embodiments.

[0037] Referring to Figures 1 and 2, Figure 1 is a schematic diagram of the overall structure of a conductive coil provided in an embodiment of the present application. Figure 2 is a cross-sectional view of the conductive coil shown in Figure 1 along AA. In this embodiment, a conductive coil 1 is provided, which is applied to an aerosol generating device, generating a magnetic field that changes when energized, thereby causing a susceptor 4 (see Figure 6a) cooperating with the conductive coil 1 to generate heat by electromagnetic induction, heating the aerosol generating product and generating an aerosol. Here, the aerosol generating product preferably uses a solid matrix, which comprises one or more powders, granules, fragments, strips, or flakes of plant leaves such as tobacco, herb leaves, tea leaves, or mint leaves. Alternatively, the solid matrix may contain additional volatile flavor compounds released when the matrix is ​​heated. Of course, the aerosol generating product may also be a liquid matrix or a paste-like matrix such as oil and medicinal liquid with added aromatic components. All the following embodiments illustrate aerosol generating products using a solid matrix.

[0038] Referring to Figures 1 and 2, the conductive coil 1 includes a conductive ring 11, which is helical in shape, for example, the conductive ring 11 is wound helically along axis B, generating a magnetic field that changes when current is applied, thereby causing the susceptor 4, which works in cooperation with the conductive coil 1, to generate heat by electromagnetic induction and heat the aerosol-generating product.

[0039] In one example, the conductive coil 1 is formed spirally from a single hollow metal wire, the conductive ring 11 is the cross-section of the metal wire, and the conductive ring 11 is extended spirally along the longitudinal direction of the metal wire. Preferably, the metal wire may be a hollow circular wire, and the filling medium located in the hollow portion is air.

[0040] Specifically, as shown in Figure 2, a filling medium 12 is placed inside the conductive ring 11, and the conductivity of the conductive ring 11 is greater than the conductivity of the filling medium 12. In this way, when current is passed through the conductive coil 1, more high-frequency current can be conducted through the conductive ring 11 based on the skin effect. Compared to conventional solutions in which the conductive coil 1 is wound using multiple Litz wires, the driving current frequency of the conductive coil 1 in this application can be set to a higher frequency, effectively improving the electromagnetic conversion efficiency of the conductive coil 1, reducing the losses of the conductive coil 1 itself, and thereby effectively reducing the heat loss of the corresponding aerosol generator and lowering power consumption.

[0041] In a specific embodiment, the ratio of the conductivity of the filling medium 12 to the conductivity of the conductive ring 11 is 10 or more, thereby ensuring that most of the high-frequency current is conducted into the conductive ring 11, reducing current loss in the filling medium 12, and improving the electromagnetic conversion efficiency of the conductive coil 1. Specifically, when current is applied to the conductive coil 1, the magnitude of the current flowing through the conductive ring 11 in the cross-section of the conductive coil 1 may be 90% or more of the magnitude of the current flowing through the conductive coil 1.

[0042] In one specific embodiment, the conductive medium is a fluid, which may be air (see Figure 2) and / or an insulating liquid. The conductive ring 11 has opposing first ports 111 and second ports 112.

[0043] Here, if the fluid is air, as shown in Figure 2, the conductive coil 1 will have a hollow annular shape, and the conductive ring 11 will form a hollow cavity. In this case, gas can be further introduced into the hollow cavity of the conductive ring 11 in order to circulate and reuse thermal energy. Specifically, the first port 111 of the conductive ring 11 may be used to introduce air, and the second port 112 of the conductive ring 11 may be in communication with a containment cavity 31 for containing the aerosol-generating product. When the conductive ring 11 is in operation, it generates heat, thereby increasing the temperature of the air in the hollow cavity of the conductive ring 11. The pressure in the hollow cavity becomes greater than the pressure in the containment cavity 31 that houses the aerosol-generating product. Due to this pressure difference, the air in the hollow cavity flows toward the second port 112, causing the high-temperature air in the hollow cavity to flow into the containment cavity 31 that houses the aerosol-generating product. This high-temperature air can then be used to further heat the aerosol-generating product, effectively improving the thermal energy utilization rate. Naturally, when the first port 111 of the conductive ring 11 is in communication with the containment cavity 31 for housing the aerosol-generating product, the second port 112 may be used for air intake and the first port 111 may be used for air exhaust.

[0044] When the fluid is an insulating liquid, the first port 111 of the conductive ring 11 can be used to inject the liquid, meaning the insulating liquid can flow into the conductive ring 11 from the first port 111. The second port 112 of the conductive ring 11 can communicate with the liquid storage cavity of the aerosol generator, allowing the insulating liquid that has entered the conductive ring 11 to flow out from the second port 112, thus continuing the cycle. This utilizes the insulating liquid to absorb the heat generated during the operation of the conductive coil 1, lowering the temperature of the conductive coil 1 itself and further lowering the temperature of the housing 2 of the aerosol generator. Similarly, the port for injecting the liquid and the port for draining the liquid are interchangeable.

[0045] The first port 111 and the second port 112 may be sealed so that the fluid is sealed inside the conductive ring 11.

[0046] Here, the insulating liquid may be hydraulic fluid, natural mineral oil, silicone oil, trichlorobiphenyl, etc.

[0047] In this specific embodiment, the radial cross-sectional shape of the conductive ring 11 may be annular (see Figure 2), elliptical, elliptical, quadrilateral, polygonal, or semi-annular. The conductive ring 11 with these cross-sectional shapes itself has sufficient strength to support its hollow annular structure.

[0048] Here, the thickness h of the side wall of the conductive ring 11 can be selected based on the skin depth d, which is the skin depth at which the high-frequency signal flows through the conductor and generates the skin effect. The skin depth is expressed by equation (1). Unlike typical high-frequency electromagnetic heating power of several hundred kilowatts, the conductive coil 1 can be applied to low power, for example, less than 100 watts. The frequency of the high-frequency current used can cover 10 kHz to 10 MHz, and the thickness h of the sidewall of the conductive ring 11 is in the range of [0.05 mm, 1.5 mm]. For example, the thickness h of the sidewall of the conductive ring 11 may be 0.05 mm, 0.75 mm, 1.0 mm, 1.3 mm, or 1.5 mm.

[0049] JPEG0007837441000002.jpg16170

[0050] JPEG0007837441000003.jpg41170 However, forming a hollow conductive coil 1 is generally done by stretching a stretched material. Considering the processing level and material limitations of this manufacturing method, the thickness of the side wall of the conductive ring 11 may be [0.05 mm, 1.5 mm]. Here, if the thickness of the side wall of the conductive ring 11 is too thin (less than 0.05 mm), the side wall of the conductive ring 11 is likely to be incomplete, resulting in a low yield rate.

[0051] JPEG0007837441000004.jpg14170

[0052] Naturally, in other embodiments, the material of the conductive coil 1 may further be silver, a copper-aluminum alloy, or the like.

[0053] Specifically, as shown in Figure 2, the thickness of the sidewalls of the conductive ring 11 may be the same everywhere along the helical extension direction of the conductive ring 11, thereby ensuring that the magnetic field generated when the conductive coil 1 is operating is the same everywhere, and improving heating uniformity. Naturally, as shown in Figure 3, Figure 3 is a cross-sectional view along AA of another embodiment of the conductive coil shown in Figure 1. At least two locations on the sidewalls of the conductive coil 1 have unequal thicknesses. For example, along the axis B direction of the conductive coil 1, the thickness h2 of the sidewall of the conductive coil 1 corresponding to the first position is greater than the thickness h1 of the sidewall of the conductive coil 1 corresponding to the second position. This allows for the use of a hollow conductor coil 1 to reduce its own losses and improve the electromagnetic conversion rate, and by increasing the thickness of some of the sidewalls of the conductive coil 1, the support strength of the conductive coil 1 itself can be increased, and the shape of the conductive coil 1 can be maintained.

[0054] Specifically, as shown in Figure 3, along axis B, the distance between adjacent windings of the conductive coil 1 at different axial positions is the same, thereby generating the same magnetic field at each position of the conductive coil 1, generating the same amount of heat at each position of the susceptor 4 with this magnetic field, and further ensuring uniform heating at each position of the aerosol-generating product.

[0055] Naturally, in other embodiments, refer to Figure 4, which is a schematic diagram of a structure in which the distance between adjacent windings of the conductive coil is not exactly the same at different axial positions. The distance between adjacent windings of the conductive coil 1 at different axial positions does not have to be exactly the same. For example, along axis B, the distance between adjacent windings of the conductive coil 1 can gradually increase. As shown in Figure 4, the distance L2 between adjacent windings of the conductive coil 1 at the first position is greater than the distance L1 between adjacent windings of the conductive coil 1 at the second position, thereby causing the susceptor 4 to form multiple regions with different temperatures along axis B.

[0056] In another specific embodiment, as shown in Figure 5, Figure 5 is a radial cross-sectional view of a conductive coil provided by one embodiment of the present application. The differences from the embodiments corresponding to Figures 2 to 4 above are as follows: The packing medium 12 is a solid substrate, and the conductive ring 11 is specifically placed on the outer surface of the substrate.

[0057] In this specific embodiment, the conductive ring 11 may be formed using a coating process, for example, by sputtering a metal target. The conductive ring 11 may specifically be a film layer placed on the outer surface of the substrate. Since the process of coating the outside of the substrate is different from the stretching process described above, the thickness of the film layer can be made very thin by the coating process, and furthermore, even within a certain range, the thinner the layer, the more advantageous it is for the process to run. As a result, with this very thin conductive ring 11 thickness, a current frequency of 1000 MHz can be selected, the corresponding calculated skin depth d range is [0.0024 mm, 0.76 mm], and the sidewall thickness h range of the conductive ring 11 is [0.0008 mm, 1.52 mm].

[0058] The conductive coil 1 corresponding to this embodiment has a thinner conductive ring 11 compared to the conductive coil 1 provided in Figures 2 to 4. During the process of high-frequency current conduction, based on the skin effect, the high-frequency current is conducted only within the conductive ring 11 and hardly at all to the substrate. As a result, a very high frequency can be used for the driving current, effectively improving the electromagnetic conversion efficiency of the conductive coil 1 and reducing the losses of the conductive coil 1 itself.

[0059] Specifically, the outer coating material of the substrate can be silver, gold, copper, etc., and the substrate material may be another metal or nonmetal with lower conductivity than the coating material, such as ceramic or rubber.

[0060] The conductive coil 1 provided in this embodiment forms a conductive ring 11, and when energized, the conductive ring 11 generates a changing magnetic field, causing the susceptor 4, which works in cooperation with the conductive coil 1, to generate heat by electromagnetic induction, thereby heating the aerosol generating product. At the same time, by placing a filling medium 12 inside the conductive ring 11, the conductivity of the conductive ring 11 becomes greater than the conductivity of the filling medium 12, and as a result, when the conductive coil 1 is energized, more high-frequency current is conducted to the conductive ring 11 based on the skin effect. Compared to conventional solutions in which the conductive coil 1 is wound using multiple Litz wires, the driving current frequency of the conductive coil 1 of this application can be used at a higher frequency, effectively improving the electromagnetic conversion efficiency of the conductive coil 1, reducing the losses of the conductive coil 1 itself, and thereby effectively reducing the heat loss of the aerosol generating device and lowering power consumption. Furthermore, by using a fluid as the filling medium 12, some of the heat generated by the conductive coil 1 during the flow process can be absorbed by the fluid, improving the heat resistance of the conductive coil 1 and lowering the temperature of the housing 2 of the aerosol generating device.

[0061] Referring to Figures 6a and 6b, Figure 6a is a cross-sectional view of an induction heating assembly provided by an embodiment of the present application, and Figure 6b is a schematic diagram of the distribution of a plurality of conductive coils. In this embodiment, an induction heating assembly 10 is provided. The induction heating assembly 10 can be used in various fields such as medical, cosmetic, and leisure smoking. The induction heating assembly 10 is used to heat and atomize an aerosol-generating product when energized to form an aerosol. The induction heating assembly 10 includes at least one conductive coil 1 provided by any of the embodiments described above, the specific structure and function of each conductive coil 1 can be found in the description in the related text above.

[0062] In one specific embodiment, as shown in Figure 6b, the induction heating assembly 10 includes a plurality of conductive coils 1, which are stacked along axis B and spaced apart, and each conductive coil 1 is used to be electrically connected to a power supply assembly 20, so that the power supply assembly 20 can supply power to each different conductive coil 1, thereby realizing segmented control of the conductive coils 1 in the induction heating assembly 10, so that the susceptor 4 cooperating with the conductive coils 1 has multiple regions with different temperatures, improving the overall atomization effect of the induction heating assembly 10.

[0063] As shown in Figure 6a, the induction heating assembly 10 may further include a housing 2, a support assembly 3, a susceptor 4, a guide sleeve 5, and a base 6. The support assembly 3 and the susceptor 4 are installed within the housing 2, the first end of the guide sleeve 5 is fitted onto one end of the support assembly 3, and the radial dimension of the guide sleeve 5 gradually increases along the direction away from the susceptor 4 to guide the aerosol-generating product into the susceptor 4. The guide sleeve 5 may be made of rubber or plastic to reduce heat conduction. The housing 2 is secured to the base 6 and the guide sleeve 5 via reinforcing ribs at its upper and lower ends, thereby relatively completely fixing the base 6, guide sleeve 5, support assembly 3, etc., which are then connected to the power supply assembly 20 via the output end of the conductive coil 1.

[0064] Here, the support assembly 3 has a housing cavity 31. The susceptor 4 and at least one conductive coil 1 are located within the housing cavity 31. Specifically, the support assembly 3 may include independently installed first and second support frames. The base 6 is sleeved to the same end of the first and second support frames, thereby locking the first and second support frames together to form the housing cavity 31 and sealing the port at one end of the support assembly 3, thereby reducing air convection heat exchange inside and outside the housing cavity 31 of the support assembly 3. Here, the first and second support frames are located on opposite sides of axis B, and the support assembly 3 is formed by combining the first and second support frames, facilitating the installation and replacement of the susceptor 4 and at least one conductive coil 1.

[0065] In a specific embodiment, the cross-sectional shapes of the first support frame and / or the second support frame along axis B may be the same and both may have a stepped shape. After combining the first support frame and the second support frame, a stepped section is formed at a predetermined position on the support assembly 3, thereby facilitating the fixing of the susceptor 4.

[0066] Specifically, the material of the support assembly 3 may be a magnetic conductive material, thereby guiding the magnetic field on one side of at least one conductive coil 1 away from the susceptor 4 and reducing electromagnetic signal loss. Here, the magnetic conductive material may be iron, cobalt, nickel, etc. Alternatively, a shielding layer can be installed on the surface of the support assembly 3 on one side away from at least one conductive coil 1, thereby shielding external electromagnetic signals and reducing electromagnetic signal leakage when at least one conductive coil 1 is operating. The shielding layer may be a metallic shielding layer such as iron, cobalt, or nickel.

[0067] The susceptor 4 is used in cooperation with at least one conductive coil 1, thereby generating heat by electromagnetic induction when the at least one conductive coil 1 is energized, to heat and atomize the aerosol-generating product. In one specific embodiment, the susceptor 4 is hollow and used to contain the aerosol-generating product, thereby heating the aerosol-generating product contained therein. At least one conductive coil 1 is arranged around the susceptor 4, and the central axes of at least one conductive coil 1 and the susceptor 4 coincide. Specifically, a helical groove is formed on the inner wall surface of the housing cavity 31, and at least one conductive coil 1 is fitted into the helical groove, thereby fixing it to the support assembly 3, thereby fulfilling the requirement of assembly consistency.

[0068] In this specific embodiment, as shown in Figure 6a, the susceptor 4 may include a main body 41 and a connecting portion 42. The main body 41 is hollow tubular and is used to contain and heat the aerosol-generating product. Specifically, the main body 41 may be a completely hollow tubular, or it may be a hollow tubular formed by combining one or more parts. The material of the main body 41 can be a metal with high conductivity, such as copper, silver, or gold.

[0069] The thickness of the sidewall of susceptor 4 can be determined by the skin effect based on the principle of electromagnetic induction heating. Specifically, the skin depth corresponding to the thickness of the sidewall of susceptor 4 at frequency f is expressed by equation (3). JPEG0007837441000005.jpg16170 Combines electromagnetic heating simulations with the feasibility of actual processing and production to select the optimal energy efficiency ratio thickness value for susceptor 4.

[0070] JPEG0007837441000006.jpg16170

[0071] Here, the susceptor 4 has a large heat capacity and high heat generation energy, and because the susceptor 4 and the conductive coil 1 are close together, the heat from the susceptor 4 is easily transferred to the conductive coil 1, causing a large amount of heat dissipation. For this reason, the main body 41 can be installed at a distance from the conductive coil 1 and the support assembly 3, thereby minimizing the transfer of heat from the main body 41 to the conductive coil 1 and the support assembly 3 by contact heat conduction, and further lowering the temperature of the housing 2 of the induction heating assembly 10.

[0072] Of course, as shown in Figure 6a, in order to further reduce the transfer of heat from the susceptor 4 to the conductive coil 1 and cause heat loss, an insulating and heat-insulating layer (not shown) may be installed on one side of the main body 41 facing the conductive coil 1. This insulating and heat-insulating layer can be formed on the entire surface of the susceptor 4 facing the conductive coil 1 by coating.

[0073] One end of the connecting portion 42 is connected to the first end of the main body portion 41, and the other end of the connecting portion 42 is connected to the stepped portion of the support assembly 3, thereby realizing a connection between the susceptor 4 and the support assembly 3. Here, by utilizing a sufficiently small contact area between the connecting portion 42 and the support assembly 3, the second end of the main body portion 41 can be suspended and installed, thereby effectively reducing heat conduction from the main body portion 41 to the support assembly 3. At the same time, in order to further reduce the transfer of heat from the main body portion 41 to the support assembly 3 through the connecting portion 42, the connecting portion 42 may be made of a non-ferrous magnetic material, thereby further slowing the heat dissipation of the susceptor 4 and achieving the objective of improving the energy efficiency of the susceptor 4. The connecting portion 42 may also be a flange.

[0074] In a specific embodiment, to improve the stability of the connection between the connector 42 and the support assembly 3, the first end of the guide sleeve 5 is fitted onto the first end of the support assembly 3, and the second end of the guide sleeve 5 is pressed against the surface of the connector 42 away from the stepped portion, thereby stably fixing the connector 42 to the stepped portion and ensuring that the force received by the connector 42 is uniform. In particular, the radial dimension of the guide sleeve 5 gradually increases along the direction away from the connector 42, thereby guiding the insertion of the aerosol-generating product into the main body 41. The guide sleeve 5 may be made of rubber or plastic to reduce heat conduction.

[0075] Specifically, the connecting portion 42 exhibits a closed annular shape along the circumferential direction of the main body portion 41. This allows the connecting portion 42 to seal one port in the space formed between the susceptor 4 and the support assembly 3.

[0076] In a specific embodiment, as shown in Figure 6a, the susceptor 4 may further include a sealing portion 43, which is connected to the second end of the main body 41 to seal the second end of the main body 41, thereby reducing air convection inside and outside the main body 41. Specifically, the material of the sealing portion 43 may be the same as the material of the connecting portion 42, and the sealing portion 43 is installed at a distance from the base 6 to reduce heat conduction.

[0077] In one specific embodiment, referring to Figure 7, Figure 7 is a cross-sectional view of an induction heating assembly provided by another embodiment of the present application. The induction heating assembly 10 further includes a magnetic conductor 7, which is located on one side away from the susceptor 4 of at least one conductive coil 1 and is used to guide the magnetic field on the one side away from the susceptor 4 of at least one conductive coil 1, thereby reducing the amount of electromagnetic signal dissipation.

[0078] Specifically, the material of the magnetic conductive body 7 is a soft magnetic alloy. The initial permeability of the soft magnetic alloy is 50 or higher, and its resistivity is 8 × 10⁻⁶. -6The capacitance is Ω·m or greater. Specifically, the magnetic conductive body 7 can be formed by integrally molding ferrite, or by encasing it in multiple layers of amorphous alloy.

[0079] Of course, the magnetic conductor 7 may be in the shape of a strip, and a strip-shaped magnetic conductor 7 is installed so as to enclose the outer circumference of at least one conductive coil 1. Alternatively, the magnetic conductor 7 may be formed by integral molding and be hollow, and the conductive coil 1 may be installed inside the hollow of the magnetic conductor 7. Alternatively, the magnetic conductor 7 may include a plurality of magnetic conductor blocks. The plurality of magnetic conductor blocks may be combined to form a single hollow structure that accommodates at least one conductive coil 1. Alternatively, the magnetic conductor 7 may be integrally bonded with at least one conductive coil 1 by powder sintering, thereby achieving magnetic permeability while simultaneously supporting at least one conductive coil 1 and a susceptor 4.

[0080] In another specific embodiment, referring to Figure 8, Figure 8 is a cross-sectional view of an induction heating assembly 10 provided by yet another embodiment of the present application. The differences from the embodiments corresponding to Figures 6a to 7 above are as follows: The susceptor 4 does not include a sealing portion 43, the second end of the main body portion 41 is connected to the base 6, and the support assembly 3 is inserted into a limiting groove of the base 6. The port at the second end of the susceptor 4 is sealed by the base 6, reducing air convection inside and outside the susceptor 4.

[0081] Of course, in other embodiments, at least one conductive coil 1 may be located inside the susceptor 4. The susceptor 4 is needle-shaped or pin-shaped and is used to insert into the aerosol-generating product, heating and atomizing the product by electromagnetic induction. At least one conductive coil 1 may also be arranged around the susceptor 4. The susceptor 4 is used to insert into the aerosol-generating product.

[0082] The induction heating assembly 10 provided in this embodiment can reduce the losses of the conductive coil 1 itself and improve the electromagnetic conversion rate by installing the conductive coil 1 as described above. At the same time, by installing the main body 41 of the susceptor 4 at a distance from at least one conductive coil 1 and the support assembly 3, and by suspending the second end of the susceptor 4, the heat conduction of heat in the susceptor 4 can be reduced, further reducing the heat dissipation in the susceptor 4 and improving the heat utilization rate. In addition, by installing the magnetic conductor 7, the dissipation of electromagnetic signals from at least one conductive coil 1 is reduced. Furthermore, by adding the guide sleeve 5, it becomes convenient for the aerosol-generating product to enter the susceptor 4 for heating and atomization.

[0083] In one embodiment, with reference to Figure 9, Figure 9 is a cross-sectional view of an induction heating assembly provided by another embodiment of the present application. Yet another induction heating assembly 10 is provided. This induction heating assembly 10 differs from the induction heating assembly 10 provided by any of the above embodiments in the following ways: At least one conductive coil 1 is installed surrounding the outer wall surface of the side wall of the susceptor 4, and the conductive coil 1 is installed at a distance from the support assembly 3. In this way, not only can heat conduction from the conductive coil 1 to the support assembly 3 be reduced, but the heat generated by the conductive coil 1 can be conducted to the aerosol-generating product via the susceptor 4, thereby heating the aerosol-generating product. At the same time, by integrally combining the conductive coil 1 and the susceptor 4 to form a heating element, the heat utilization rate of the heat capacity formed by the entire susceptor 4 and conductive coil 1 is further increased, thereby achieving the objective of improving the energy efficiency of the susceptor 4. Furthermore, this solution can reduce the overall volume of the induction heating assembly 10.

[0084] In this embodiment, an insulating layer (not shown) is installed between at least one conductive coil 1 and the susceptor 4 to prevent a short circuit between the conductive coil 1 and the susceptor 4. Here, the insulating layer may be formed on the outer wall surface of the susceptor 4. Of course, the insulating layer may also cover the outer wall surface of the side wall of the conductive coil 1.

[0085] Specifically, the insulating layer is a coating structure formed by methods such as coating or deposition, or a film layer structure attached to the surface of the susceptor 4 or the conductive coil 1.

[0086] In this embodiment, an additional insulating material may be installed between the conductive coil 1 and the support assembly 3 to reduce heat dissipation. Specifically, the insulating material may be applied to the outer surface of the side walls of the conductive coil 1 and the susceptor 4, thereby isolating the entire structure composed of the conductive coil 1 and the susceptor 4 from airflow exchange with the outside. The insulating material may be aerogel, ferrite, or a microcrystalline alloy.

[0087] In one embodiment, referring to Figure 10, which is a schematic diagram of an aerosol generating device according to one embodiment of the present application, an aerosol generating device is provided. The aerosol generating device includes an induction heating assembly 10 and a power supply assembly 20. Here, the induction heating assembly 10 is used to house the aerosol generating product and heats and atomizes the aerosol generating product when energized, and the induction heating assembly 10 is the induction heating assembly 10 provided in any of the above embodiments. Its specific structure and function can be referred to in the description of the related text above.

[0088] The power supply assembly 20 is electrically connected to the induction heating assembly 10 and is used to supply power to the induction heating assembly 10, thereby ensuring that the aerosol generating device operates normally. Specifically, the power supply assembly 20 may be a dry cell battery, a lithium battery, or the like.

[0089] In one embodiment, with reference to Figure 11, which is a schematic diagram of an aerosol generator provided by another embodiment of the present application, another aerosol generator is provided, which differs from the aerosol generator corresponding to Figure 10, further comprising an aerosol generating product 30, and the susceptor 4 is specifically positioned within the aerosol generating product 30. The aerosol generating product 30 may be specifically housed within a housing cavity 31 formed by a support assembly 3, thereby the susceptor 4 inserted into the housing cavity 31 centrally heats the aerosol generating product 30 by electromagnetic induction.

[0090] The above describes only a portion of the embodiments of this application and does not limit the scope of the patent. Equivalent devices or equivalent process transformations, or other related technical applications, that are directly or indirectly applied using the contents of the specification and drawings of this application are all similarly included within the scope of the patent protection of this application.

Claims

1. A conductive coil is used to generate a magnetic field that changes when current is applied, thereby causing a susceptor cooperating with the conductive coil to generate heat by electromagnetic induction, thereby heating the aerosol-generating product. The conductive coil includes a conductive ring, which is used to generate a magnetic field that changes when current is applied, and the filling medium is placed inside the conductive ring, and the conductivity of the conductive ring is greater than the conductivity of the filling medium. A conductive coil characterized in that the filling medium is a fluid, the fluid is an insulating liquid, or the filling medium is a solid substrate, and the conductive ring is installed on the outer surface of the substrate.

2. The conductive coil according to claim 1, characterized in that the conductive coil is formed in a spiral shape from a single hollow metal wire, the conductive ring is the cross-section of the metal wire, and the conductive ring is extended in a spiral shape along the longitudinal direction of the metal wire.

3. The conductive coil according to claim 1, characterized in that the ratio of the conductivity of the conductive ring to the conductivity of the filling medium is 10 or more.

4. The conductive coil according to claim 1, characterized in that the cross-sectional shape of the conductive ring is annular, elliptic, elliptic, square, polygonal, or semi-annular.

5. The conductive coil according to claim 1, characterized in that the thickness of the side wall of the conductive ring is the same everywhere, or the thickness of the side wall of the conductive ring differs at least two locations.

6. The conductive coil according to claim 1, characterized in that the conductive coil is helical, and the distance between adjacent windings of the conductive coil at different axial positions is the same everywhere or not at all the same everywhere.

7. The conductive coil according to claim 1, wherein the conductive ring has opposing first and second ports, and the fluid flows into the conductive ring from one of the first and second ports and flows out from the other of the first and second ports, or the fluid is sealed within the conductive ring by seals of the first and second ports.

8. The conductive coil according to claim 1, characterized in that the thickness of the side wall of the conductive ring is 0.05 mm to 1.5 mm.

9. The conductive coil according to claim 1, characterized in that the thickness of the side wall of the conductive ring is 0.0008 mm to 1.52 mm.

10. An induction heating assembly comprising at least one of the conductive coils according to any one of claims 1 to 9, and a susceptor, The susceptor is used in cooperation with at least one of the conductive coils to generate heat by electromagnetic induction. The susceptor is used to insert and heat the aerosol-generating product, or An induction heating assembly characterized in that at least one of the conductive coils is arranged around the susceptor, and the susceptor is used to contain and heat an aerosol-generating product.

11. The induction heating assembly according to claim 10, characterized in that at least one of the conductive coils is installed surrounded by the outer wall surface of the side wall of the susceptor, and an insulating layer is installed between at least one of the conductive coils and the susceptor.

12. The induction heating assembly according to claim 11, characterized in that the insulating layer is formed on the outer wall surface of the susceptor, or the outer wall surface of the side wall of the conductive coil is covered with the insulating layer.

13. The induction heating assembly according to claim 12, characterized in that the number of conductive coils is multiple, the multiple conductive coils are stacked and installed along the axial direction of the susceptor, and each is connected to a power supply assembly.

14. The induction heating assembly according to claim 10, further comprising a support assembly, the support assembly having a housing cavity, the susceptor and at least one of the conductive coils located within the housing cavity, and at least one of the conductive coils mounted on the side wall surface of the housing cavity.

15. The induction heating assembly according to claim 14, characterized in that at least one of the conductive coils is arranged surrounding the outer circumference of the susceptor, the susceptor includes a body portion, the body portion is spaced apart from the support assembly and has a hollow tubular shape, and is used to contain and heat an aerosol generating product.

16. The induction heating assembly according to claim 15, characterized in that the susceptor further includes a connecting portion, the first end of the main body is connected to the support assembly via the connecting portion, and the second end of the main body is suspended and installed.

17. The induction heating assembly according to claim 15, further comprising a base, wherein the support assembly is mounted on the base, and the second end of the main body is mounted at a distance from the base, or the second end of the main body rests on the base.

18. The induction heating assembly according to claim 10, further comprising a magnetic conductor, the magnetic conductor located on the side of the at least one conductive coil away from the susceptor, and used to guide the magnetic field on the side of the at least one conductive coil away from the susceptor.

19. The material of the magnetic conduit is a soft magnetic alloy, the initial permeability of the soft magnetic alloy is 50 or more, and its resistivity is 8 × 10⁻⁶. -6 It is greater than or equal to Ω·m, or The magnetic conductor is in the shape of a strip, and at least one of the conductive coils is wrapped in the strip-shaped magnetic conductor, or The magnetic conduit is formed by integral molding and has a hollow structure, and at least one of the conductive coils is installed within the hollow of the magnetic conduit, or The magnetic conduit includes a plurality of magnetic conduit blocks, which are combined to form a single hollow structure to house at least one of the conductive coils, or The induction heating assembly according to claim 18, characterized in that the magnetic conductor is integrally bonded with at least one of the conductive coils by a powder sintering method and functions as a support assembly.

20. an aerosol generating apparatus comprising an induction heating assembly and a power supply assembly, The induction heating assembly is used to heat and atomize an aerosol-generating product when energized, and the induction heating assembly is the induction heating assembly described in claim 10. The aerosol generating apparatus is characterized in that the power supply assembly is electrically connected to the induction heating assembly and used to supply power to the induction heating assembly.

21. An aerosol generating apparatus comprising an aerosol generating product, a susceptor, a conductive coil, and a power supply assembly, The susceptor is located in the aerosol generating product, The conductive coil is used to generate a magnetic field that changes when current is applied, thereby causing the susceptor to generate heat by electromagnetic induction, and heating the aerosol generating product, and the conductive coil is the conductive coil described in any one of claims 1 to 9. The aerosol generating apparatus is characterized in that the power supply assembly is electrically connected to the induction heating assembly and used to supply power to the induction heating assembly.

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