Conductive coil, induction heating assembly and aerosol generating device

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 the 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 in particular 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 only. 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 structure 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 device provided by this application aim to solve the problems of large losses in the conventional conductive coil itself, low electromagnetic conversion efficiency, large overall heat loss, and high power consumption.

Means for Solving the Problems

[0007] A conductive coil is provided. The conductive coil is used to generate a changing magnetic field when energized, whereby a susceptor cooperating with the conductive coil generates heat by electromagnetic induction to heat an aerosol generating product. The conductive coil includes a conductive ring. The conductive ring is used to generate a changing magnetic field when energized, and a filling medium is installed in the conductive ring. The conductivity of the conductive ring is greater than the conductivity of the filling medium.

[0008] Here, the conductive coil is formed in a spiral shape by a single hollow metal wire. The conductive ring is the cross-section of the metal wire, and the conductive ring extends in a spiral shape 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 an annular shape, an elliptical annular shape, an ellipse, a square, a polygon, or a semi-annular shape.

[0011] Here, the thickness of the side wall of the conductive ring is the same everywhere, or there are at least two locations on the side wall of the conductive ring where the thicknesses are different.

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

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

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

[0015] Here, the conductive ring has a first port and a second port facing each other, and the fluid flows into the conductive ring from one of the first port and the second port and flows out from the other of the first port and the second port, or the fluid is sealed in the conductive ring by the seals of the first port and the second port.

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

[0017] Here, the filling medium is a solid substrate, and the conductive ring is installed 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 adopted by this application is as follows. Provide an induction heating assembly. The induction heating assembly includes at least one of the above conductive coils and a susceptor, and the susceptor cooperates with at least one of the conductive coils to generate heat by electromagnetic induction. The susceptor is used to insert and heat an aerosol generating product, or at least one of the conductive coils is arranged to surround the susceptor, and the susceptor is used to accommodate and heat an aerosol generating product.

[0020] Here, at least one of the conductive coils is arranged to surround the outer wall surface of the side wall of the susceptor, and an insulating layer is arranged 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 by 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 a distance from the support assembly, has a hollow tubular shape, and is used for accommodating and heating an aerosol generating product.

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

[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 arranged at a distance 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 of the at least one conductive coil away from the susceptor, and is used for guiding the magnetic field on the side of the at least one conductive coil away from the susceptor.

[0028] Here, the material of the magnetic conductor is a soft magnetic alloy. The initial permeability of the soft magnetic alloy is 50 or more, and its resistivity is 8×10 -6above Ω·m, or the magnetic conductor is strip-shaped, 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 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 a powder sintering method 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 disposed 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 the present application are as follows. Compared with the prior art, the embodiment of the present application provides a conductive loop, an induction heating assembly, and an aerosol generating device. The conductive coil forms a conductive ring, and when energized, a changing magnetic field is generated in the conductive ring, so that a susceptor cooperating with the conductive coil generates heat by electromagnetic induction to heat the aerosol generating product. At the same time, by installing a filling medium in the conductive ring, the conductivity of the conductive ring is made greater than the conductivity of the filling medium. Thus, when the conductive coil is energized, more high-frequency current is conducted into the conductive ring based on the skin effect. Compared with the conventional solution in which the conductive coil is wound using a plurality of Litz wires, the driving current frequency of the conductive coil provided by the present application can adopt a higher frequency. Thereby, the electromagnetic conversion efficiency of the conductive coil is effectively improved, the loss of the conductive coil itself is reduced, the heat loss of the aerosol generating device is effectively reduced, and the power consumption is reduced.

Brief Description of the Drawings

[0032]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6a

Figure 6b

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Modes for Carrying Out the Invention

[0033] Hereinafter, the technical solutions of the embodiments of the present application will be clearly and completely described with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without inventive labor belong to the protection scope of the present application.

[0034] In this application, terms such as "first", "second", "third", etc. are used only for illustrative purposes and should not be construed as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, features defined as "first", "second", "third" can explicitly or implicitly include at least one of such features. In the description of this application, "a plurality" means at least two, for example, two, three, etc., unless there is a separate clear and specific definition. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are used to interpret the relative positional relationship, movement status, etc. between each component in a specific posture (such as shown in the drawings). When the specific posture changes, the directionality changes accordingly. Also, the terms "comprising", "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, and may optionally further include steps or units not listed, or optionally further include other steps or units specific to these processes, methods, products or devices.

[0035] As used herein, "embodiment" means that a specific feature, structure or characteristic described with reference to an embodiment may be included in at least one embodiment of this application. The repeated occurrence of this associated word at each location in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. As will be explicitly and implicitly understood by those skilled in the art, the embodiments described herein can be combined with other embodiments.

[0036] Hereinafter, this application will be described in detail 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 by an embodiment of the present application. Figure 2 is a cross-sectional view of the conductive coil shown in Figure 1 along the line AA. In this embodiment, a conductive coil 1 is provided, which is applied to an aerosol generating device and generates a magnetic field that changes when energized, so that a susceptor 4 (see Figure 6a) cooperating with the conductive coil 1 generates heat by electromagnetic induction, heating the aerosol-generating product and generating an aerosol. Here, the aerosol-generating product preferably uses a solid matrix, which includes one or more powders, granules, pieces, strips or flakes of plant leaves such as tobacco, herb leaves, tea leaves, mint leaves, etc. Or the solid matrix can include additional volatile flavor compounds that are released when the matrix is ​​heated. Of course, the aerosol-generating product may be a liquid matrix or a paste-like matrix, such as oil and medicinal liquid to which aromatic ingredients are added. The following embodiments all exemplify aerosol-generating products using solid matrices.

[0038] 1 and 2, the conductive coil 1 includes a conductive ring 11 that is helical, for example, wound helically along an axis B, to generate a changing magnetic field when energized, thereby causing a susceptor 4 cooperating with the conductive coil 1 to generate heat by electromagnetic induction to heat the aerosol-generating product.

[0039] In one example, the conductive coil 1 is formed in a spiral shape from a single hollow metal wire, the conductive ring 11 is a cross section of the metal wire, and the conductive ring 11 extends in a spiral shape 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 FIG. 2, a filling medium 12 is installed within the conductive ring 11, and the conductivity of the conductive ring 11 is greater than that of the filling medium 12. In this way, when an electric current is applied to the conductive coil 1, based on the skin effect, more high-frequency current can be conducted by the conductive ring 11. Compared with the conventional solution where the conductive coil 1 is wound using a plurality of Litz wires, the driving current frequency of the conductive coil 1 in the present application can use a higher frequency, effectively improving the electromagnetic conversion efficiency of the conductive coil 1, reducing the loss of the conductive coil 1 itself, thereby effectively reducing the heat loss of the corresponding aerosol generating device and reducing the 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 conducts within the conductive ring 11, reducing the current loss in the filling medium 12, and improving the electromagnetic conversion rate of the conductive coil 1. Specifically, when an electric current is applied to the conductive coil 1, in the cross-section of the conductive coil 1, the magnitude of the current flowing through the conductive ring 11 may be 90% or more of the magnitude of the current flowing through the conductive coil 1.

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

[0043] Here, when the fluid is air, referring to FIG. 2, the conductive coil 1 presents a hollow annular shape, and the conductive ring 11 forms a hollow cavity. In this case, in order to circulate and reuse thermal energy, gas can be further introduced into the hollow cavity of the conductive ring 11. 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 communicated with the accommodation cavity 31 for accommodating the aerosol generating product. When the conductive ring 11 is in an operating state, the conductive ring 11 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 accommodation cavity 31 that accommodates the aerosol generating product. The air in the hollow cavity flows towards the direction of the second port 112 under the action of the pressure difference, and the high-temperature air in the hollow cavity flows into the accommodation cavity 31 that accommodates the aerosol generating product. Thereby, the aerosol generating product can be further heated by using the high-temperature air, effectively improving the utilization rate of thermal energy. Of course, it should be understood that when the first port 111 of the conductive ring 11 is communicated with the accommodation cavity 31 for accommodating the aerosol generating product, the second port 112 may be used for air inhalation, and the first port 111 may be used for air discharge.

[0044] When the fluid is an insulating liquid, the first port 111 of the conductive ring 11 can be used to inject the liquid, that is, the insulating liquid can flow into the conductive ring 11 from the first port 111 of the conductive ring 11. The second port 112 of the conductive ring 11 can be communicated with the liquid storage cavity of the aerosol generating device. The insulating liquid that enters the conductive ring 11 can flow out from the second port 112 of the conductive ring 11, and the cycle continues. Thereby, the heat generated during the operation of the conductive coil 1 is taken away by using the insulating liquid, the temperature of the conductive coil 1 itself is reduced, and further the temperature of the housing 2 of the aerosol generating device is reduced. Similarly, the port for injecting the liquid and the port for discharging the liquid are interchangeable.

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

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

[0047] In this specific embodiment, the radial cross-sectional shape of the conductive ring 11 may be an annular shape (see Fig. 2), an elliptical annular shape, an ellipse, a quadrilateral, a polygon, or a semi-annular shape, etc. The conductive ring 11 itself with these cross-sectional shapes has sufficient strength and can 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 at which the high-frequency signal flows through the conductor to generate the skin effect. The skin depth is represented by Equation (1). JPEG2025519963000002.jpg22170 Different from the normal high-frequency electromagnetic heating power of several hundred kilowatts, the conductive coil 1 can be applied to a low power of, for example, within one hundred watts. The frequency of the high-frequency current used can cover 10Khz to 10Mhz, and the range of the thickness h of the side wall of the conductive ring 11 is [0.05mm, 1.5mm]. For example, the thickness h of the side wall of the conductive ring 11 may be 0.05mm, 0.75mm, 1.0mm, 1.3mm, or 1.5mm.

[0049] JPEG2025519963000003.jpg16170

[0050] JPEG2025519963000004.jpg41170 However, forming the hollow conductive coil 1 is generally manufactured by a method of stretching a stretching material. Thus, considering the processing level and material limitations of this manufacturing method, the thickness of the side wall of the conductive ring 11 may be [0.05mm, 1.5mm]. Here, if the thickness of the side wall of the conductive ring 11 is too thin (less than 0.05mm), the side wall of the conductive ring 11 is likely to be incomplete and the yield rate is low.

[0051] JPEG2025519963000005.jpg14170

[0052] Of course, 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 FIG. 2, along the spiral extension direction of the conductive ring 11, the thickness of the side wall of the conductive ring 11 may be the same everywhere, thereby ensuring that the magnetic field generated when the conductive coil 1 operates is the same everywhere and improving the heating uniformity. Of course, as shown in FIG. 3, FIG. 3 is a cross-sectional view taken along A-A of another embodiment of the conductive coil shown in FIG. 1. The thicknesses of at least two locations on the side wall of the conductive coil 1 are not equal. For example, along the axis B direction of the conductive coil 1, the thickness h2 of the side wall of the conductive coil 1 corresponding to the first position is greater than the thickness h1 of the side wall of the conductive coil 1 corresponding to the second position. Thereby, the loss of the hollow conductor coil 1 can be reduced to improve the electromagnetic conversion rate, and by thickening the thickness of a part of the side wall of the conductive coil 1, the support strength of the conductive coil 1 itself can be increased to maintain the form of the conductive coil 1 itself.

[0054] Specifically, as shown in FIG. 3, along the axis B direction, 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 the heating uniformity at each position of the aerosol generating product.

[0055] Of course, in other embodiments, referring to FIG. 4, FIG. 4 is a schematic structural diagram in which the distances between adjacent windings of the conductive coil at different axial positions are not exactly the same. The distances between adjacent windings of the conductive coil 1 at different axial positions may not be exactly the same. For example, along the direction of axis B, the distances between adjacent windings of the conductive coil 1 can gradually increase. As shown in FIG. 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, whereby the susceptor 4 forms a plurality of regions with different temperatures along the direction of axis B.

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

[0057] In this specific embodiment, the conductive ring 11 may use a coating process, for example, formed by sputtering a metal target. The conductive ring 11 may specifically be a film layer installed on the outer surface of the substrate. Since the process of coating outside the substrate is different from the above stretching process, the thickness of the film layer can be made very thin by the coating process, and even within a certain range, the thinner it is, the more advantageous it is for the execution of the process. Thereby, with the thickness of this very thin conductive ring 11, the current frequency can be selected as 1000Mhz, the corresponding calculated skin depth d range is [0.0024mm, 0.76mm], and the range of the thickness h of the side wall of the conductive ring 11 is [0.0008mm, 1.52mm].

[0058] Compared with the conductive coil 1 provided in FIGS. 2 to 4 corresponding to this embodiment, the thickness of the conductive ring 11 of the conductive coil 1 is thinner. In the process of high-frequency current conduction, based on the skin effect, the high-frequency current is only conducted within the conductive ring 11 and hardly conducted to the substrate. Thereby, a very high frequency can be used for the driving current frequency, effectively improving the electromagnetic conversion efficiency of the conductive coil 1 and reducing the loss of the conductive coil 1 itself.

[0059] Specifically, the coating material on the outside of the substrate can use silver, gold, copper, etc., and the material of the substrate can be other metals or non-metals with lower conductivity than the coating material, for example, ceramics, rubber, etc.

[0060] The conductive coil 1 provided in this embodiment forms a conductive ring 11, and when the conductive ring 11 is energized, it generates a changing magnetic field, so that the susceptor 4 cooperating with the conductive coil 1 generates heat by electromagnetic induction to heat the aerosol generating product. At the same time, by installing the filling medium 12 in the conductive ring 11, the conductivity of the conductive ring 11 becomes greater than the conductivity of the filling medium 12. Thereby, when the conductive coil 1 is energized, based on the skin effect, more high-frequency current is conducted to the conductive ring 11. Compared with the conventional solution in which the conductive coil 1 is wound using a plurality of litz wires, the driving current frequency of the conductive coil 1 of this application can use a higher frequency, effectively improving the electromagnetic conversion efficiency of the conductive coil 1 and reducing the loss of the conductive coil 1 itself, thereby effectively reducing the heat loss of the aerosol generating device and reducing the power consumption. Also, by using the filling medium 12 as a fluid, a part of the heat generated by the conductive coil 1 during the flowing process can be taken away by the fluid, improving the heat resistance performance of the conductive coil 1 and reducing the temperature of the housing 2 of the aerosol generating device.

[0061] Referring to FIGS. 6a and 6b, FIG. 6a is a cross-sectional view of an induction heating assembly provided by an embodiment of the present application, and FIG. 6b is a schematic distribution diagram 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 treatment, beauty, 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 above embodiments, and the specific structure and function of each conductive coil 1 can refer to the description in the above related text.

[0062] In one specific embodiment, as shown in FIG. 6b, the induction heating assembly 10 includes a plurality of conductive coils 1, and the plurality of conductive coils 1 are stacked along the axis B and arranged at intervals, and each conductive coil 1 is used to be electrically connected to the power supply assembly 20 respectively. Thereby, the power supply assembly 20 can supply power to different conductive coils 1 respectively, realizing the divided control of the conductive coils 1 in the induction heating assembly 10. Thereby, the susceptor 4 cooperating with the conductive coils 1 has a plurality of regions with different temperatures, improving the overall atomization effect of the induction heating assembly 10.

[0063] As shown in FIG. 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 in the housing 2. The first end of the guide sleeve 5 is fitted to 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 insertion of the aerosol-generating product into the susceptor 4. The guide sleeve 5 may be a rubber or plastic sleeve to reduce heat conduction. The housing 2 is locked to the base 6 and the guide sleeve 5 through the reinforcing ribs at the upper and lower ends, whereby the base 6, the guide sleeve 5, the support assembly 3, etc. are relatively completely fixed, and then connected to the power supply assembly 20 through the lead-out end of the conductive coil 1.

[0064] Here, the support assembly 3 has a receiving cavity 31. The susceptor 4 and at least one conductive coil 1 are located within the receiving cavity 31. Specifically, the support assembly 3 can include a first support frame and a second support frame that are independently installed. The base 6 is sleeved on the same end of the first support frame and the second support frame, thereby locking the first support frame and the second support frame, enabling the first support frame and the second support frame to cooperate to form the receiving cavity 31, sealing the port at one end of the support assembly 3, and reducing the air convection heat exchange inside and outside the receiving cavity 31 of the support assembly 3. Here, the first support frame and the second support frame are located on both sides of the axis B, and the support assembly 3 is formed by combining the first support frame and the second support frame, 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 the axis B can be the same and both can exhibit a stepped shape. After combining the first support frame and the second support frame, a stepped portion is formed at a preset position of the support assembly 3, thereby facilitating the fixing of the susceptor 4.

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

[0067] The susceptor 4 is used to cooperate with at least one conductive coil 1, so that when the at least one conductive coil 1 is energized, heat is generated by electromagnetic induction to heat and atomize the aerosol generating product. In one specific embodiment, the susceptor 4 is hollow and is used to accommodate the aerosol generating product, thereby heating the aerosol generating product accommodated therein. The at least one conductive coil 1 is disposed around the susceptor 4, and the central axes of the at least one conductive coil 1 and the susceptor 4 coincide. Specifically, a spiral groove is formed on the inner wall surface of the accommodation cavity 31, and the at least one conductive coil 1 is fitted into the spiral groove, thereby being fixed to the support assembly 3 to meet the requirements of assembly consistency.

[0068] In this specific embodiment, as shown in FIG. 6a, the susceptor 4 can include a main body portion 41 and a connecting portion 42. The main body portion 41 is hollow tubular and is used to accommodate and heat the aerosol generating product. The main body portion 41 may specifically be a complete hollow tube, or may be a hollow tube formed by combining single or multiple components. The material of the main body portion 41 can use a metal with high conductivity, such as copper, silver or gold, etc.

[0069] The thickness of the side wall of the 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 side wall of the susceptor 4 at frequency f is represented by Equation (3). JPEG2025519963000006.jpg16170 Combine the electromagnetic heating simulation and the feasibility of actual processing production to select the value of the thickness of the optimal energy efficiency ratio of the susceptor 4.

[0070] JPEG2025519963000007.jpg16170

[0071] Here, since the susceptor 4 has a large heat capacity, high heat generation energy, and the susceptor 4 and the conductive coil 1 are close to each other, the heat quantity of the susceptor 4 is easily transmitted to the conductive coil 1, causing a large amount of heat dissipation. Therefore, the main body portion 41 can be installed at a distance from the conductive coil 1 and the support assembly 3, thereby reducing as much as possible the heat on the main body portion 41 from being transmitted to the conductive coil 1 and the support assembly 3 by contact heat conduction, and further reducing the temperature of the housing 2 of the induction heating assembly 10.

[0072] Of course, as shown in FIG. 6a, in order to further reduce the heat quantity of the susceptor 4 from being transmitted to the conductive coil 1 and causing heat loss, a heat insulation and heat preservation layer (not shown) may be installed on the surface of the main body portion 41 facing the conductive coil 1. The heat insulation and heat preservation layer can be formed on the entire surface of the susceptor 4 facing the conductive coil 1 by a coating method.

[0073] One end of the connecting portion 42 is connected to the first end portion 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 the 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 portion of the main body portion 41 can be suspended and installed, thereby effectively reducing the heat conduction from the main body portion 41 to the support assembly 3. At the same time, in order to further reduce the heat transmitted 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-ferromagnetic material, thereby further slowing down the heat dissipation of the susceptor 4 and achieving the purpose of improving the energy efficiency of the susceptor 4. The connecting portion 42 may be a flange.

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

[0075] Specifically, the connection part 42 presents a closed annular shape along the circumferential direction of the main body part 41. Thereby, one port of the space formed between the susceptor 4 and the support assembly 3 can be sealed by using the connection part 42.

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

[0077] In a specific embodiment, referring to FIG. 7, FIG. 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. The magnetic conductor 7 is located on the side away from the susceptor 4 of at least one conductive coil 1 and is used to guide the magnetic field on the side away from the susceptor 4 of at least one conductive coil 1, thereby reducing the dissipation amount of electromagnetic signals.

[0078] Specifically, the material of the magnetic conductor 7 is a soft magnetic alloy. The initial permeability of the soft magnetic alloy is 50 or more, and the resistivity is 8×10 -6It is above Ω·m. Specifically, the magnetic conductor 7 can be integrally formed of ferrite or formed by being wrapped with multiple layers of amorphous alloy.

[0079] Of course, the magnetic conductor 7 may be in the shape of a strip, and the strip-shaped magnetic conductor 7 is installed to surround the outer periphery of at least one conductive coil 1. Or the magnetic conductor 7 is integrally formed and has a hollow shape, and the conductive coil 1 is installed inside the hollow of the magnetic conductor 7. Or, the magnetic conductor 7 includes a plurality of magnetic blocks. The plurality of magnetic blocks are combined to form a hollow structure that accommodates at least one conductive coil 1. Or, the magnetic conductor 7 is integrally coupled with at least one conductive coil 1 by means of powder sintering, thereby realizing magnetic permeability performance and supporting at least one conductive coil 1 and the susceptor 4 at the same time.

[0080] In another specific embodiment, referring to FIG. 8, FIG. 8 is a cross-sectional view of an induction heating assembly 10 provided by still another embodiment of the present application. The differences from the embodiments corresponding to FIGS. 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 the limiting groove of the base 6. The port at the second end of the susceptor 4 is sealed by the base 6 to reduce the air convection inside and outside the susceptor 4.

[0081] Of course, in other embodiments, at least one conductive coil 1 may be disposed inside the susceptor 4. The susceptor 4 is needle-shaped or pin-shaped and is used for insertion into an aerosol generating product to heat and atomize the aerosol generating product by electromagnetic induction. At least one conductive coil 1 may also be disposed surrounding the susceptor 4. The susceptor 4 is used for insertion into an aerosol generating product.

[0082] The induction heating assembly 10 provided by this embodiment can reduce the loss of the conductive coil 1 itself and improve the electromagnetic conversion rate by installing the conductive coil 1 related 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 suspending and installing the second end of the susceptor 4, the heat conduction of the heat quantity of the susceptor 4 can be reduced, and further, the dissipation of the heat quantity in the susceptor 4 can be reduced, and the heat utilization rate can be improved. In addition, by installing the magnetic conductor 7, the dissipation of the electromagnetic signal of at least one conductive coil 1 can be reduced. Also, by adding the guide sleeve 5, it is convenient for the aerosol generating product to enter the susceptor 4 for heating and atomization.

[0083] In one embodiment, referring to FIG. 9, FIG. 9 is a cross-sectional view of an induction heating assembly provided by another embodiment of the present application. Still another induction heating assembly 10 is provided. The difference between this induction heating assembly 10 and the induction heating assembly 10 provided by any of the above embodiments is as follows. 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 the heat conduction from the conductive coil 1 to the support assembly 3 be reduced, but also the heat generated by the conductive coil 1 can be conducted to the aerosol generating product through the susceptor 4, thereby heating the aerosol generating product. At the same time, by integrally coupling 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 the conductive coil 1 is further increased, thereby achieving the purpose of improving the energy efficiency of the susceptor 4. Further, this solution can reduce the volume of the entire induction heating assembly 10.

[0084] In this embodiment, in order to prevent a short circuit between the conductive coil 1 and the susceptor 4, an insulating layer (not shown) is installed between at least one 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 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 a method 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, a heat insulating material may be further installed between the conductive coil 1 and the support assembly 3, thereby reducing the dissipation of heat. Specifically, the heat insulating material may cover the outer surfaces of the side walls of the conductive coil 1 and the susceptor 4, thereby isolating the overall structure composed of the conductive coil 1 and the susceptor 4 from the air flow exchange with the outside. The heat insulating material may be aerogel, ferrite, or microcrystalline alloy, etc.

[0087] In one embodiment, referring to FIG. 10, FIG. 10 is a schematic structural diagram of an aerosol generating device according to an 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 accommodate an aerosol generating product, heats and atomizes the aerosol generating product when energized, and the induction heating assembly 10 is the induction heating assembly 10 provided by any of the above embodiments. Its specific structure and function can be referred to the description of the above related text.

[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 the normal operation of the aerosol generating device. Specifically, the power supply assembly 20 may be a dry battery, a lithium battery, etc.

[0089] In one embodiment, referring to FIG. 11, FIG. 11 is a schematic structural diagram of an aerosol generating device provided by another embodiment of the present application. Another aerosol generating device is provided. Different from the aerosol generating device corresponding to FIG. 10, the aerosol generating device further includes an aerosol generating product 30, and the susceptor 4 is specifically disposed within the aerosol generating product 30. The aerosol generating product 30 may specifically be housed within a receiving cavity 31 formed by the support assembly 3, whereby the susceptor 4 inserted within the receiving cavity 31 centrally heats the aerosol generating product 30 by electromagnetic induction.

[0090] The above is only a part of the embodiments of the present application, and does not limit the scope of the patent of the present application. Any equivalent device or equivalent process transformation carried out using the content of the specification and drawings of the present application, or any application directly or indirectly applied to other related technical fields, is similarly included within the scope of patent protection of the present application.

Claims

1. A conductive coil, wherein the conductive coil is used to generate a magnetic field that changes when energized, whereby a susceptor cooperating with the conductive coil generates heat by electromagnetic induction to heat an aerosol-generating product. The conductive coil includes a conductive ring, the conductive ring is used to generate a magnetic field that changes when energized, and a filling medium is installed in the conductive ring, and the conductivity of the conductive ring is greater than the conductivity of the filling medium. A conductive coil characterized by this.

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

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

4. The cross-sectional shape of the conductive ring is an annular shape, an elliptical annular shape, an ellipse, a square, a polygon, or a semi-annular shape. The conductive coil according to claim 1, characterized in that.

5. The thickness of the side wall of the conductive ring is the same everywhere, or at least two places on the side wall of the conductive ring have different thicknesses. The conductive coil according to claim 1, characterized in that.

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

7. The filling medium is a fluid. The conductive coil according to claim 1, characterized in that.

8. The fluid is air and / or an insulating liquid. The conductive coil according to claim 7, characterized in that.

9. 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 in the conductive ring by sealing the first and second ports. The conductive coil according to claim 8, characterized in that.

10. The thickness of the side wall of the conductive ring is 0.05 mm to 1.5 mm. The conductive coil according to claim 7, characterized in that.

11. The filling medium is a solid substrate, and the conductive ring is installed on the outer surface of the substrate. The conductive coil according to claim 1, characterized in that.

12. The conductive coil according to claim 11, characterized in that the thickness of the side wall of the conductive ring is 0.0008 mm to 1.52 mm.

13. An induction heating assembly comprising at least one of the conductive coils according to any one of claims 1 to 12 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 an aerosol generating product, or An induction heating assembly, characterized in that at least one of the conductive coils is arranged surrounding the susceptor, and the susceptor is used to accommodate and heat an aerosol generating product.

14. The induction heating assembly according to claim 13, characterized in that at least one of the conductive coils is installed surrounding 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.

15. The induction heating assembly according to claim 14, 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 coated with the insulating layer.

16. The induction heating assembly according to claim 15, characterized in that 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 each is connected to a power supply assembly.

17. The induction heating assembly further includes a support assembly, the support assembly has an accommodation cavity, the susceptor and at least one of the conductive coils are located in the accommodation cavity, and at least one of the conductive coils is installed on the side wall surface of the accommodation cavity. The induction heating assembly according to claim 13, characterized in that.

18. The induction heating assembly according to claim 17, characterized in that at least one of the conductive coils is arranged surrounding the outer periphery of the susceptor, the susceptor includes a main body portion, the main body portion is arranged at a distance from the support assembly, and has a hollow tubular shape and is used to accommodate and heat an aerosol generating product.

19. The susceptor further includes a connection portion, and a first end of the main body portion is connected to the support assembly via the connection portion, and a second end of the main body portion is suspended and installed. The induction heating assembly according to claim 18, characterized in that.

20. The induction heating assembly further includes a base, the support assembly is installed on the base, a second end of the main body portion is installed at a distance from the base, or a second end of the main body portion is placed on the base. The induction heating assembly according to claim 18, characterized in that.

21. The induction heating assembly further includes a magnetic conductor, the magnetic conductor is located on a side away from the susceptor of the at least one conductive coil, and is used to guide a magnetic field on a side away from the susceptor of the at least one conductive coil. The induction heating assembly according to claim 13, characterized in that.

22. 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 -6 Ω·m or more, or The magnetic conductor is strip-shaped, and 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, and at least one of the conductive coils is installed in the hollow of the magnetic conductor, or, The magnetic conductor includes a plurality of magnetic conduction blocks, and the plurality of magnetic conduction blocks are combined to form a single hollow structure for accommodating at least one of the conductive coils, or, The magnetic conductor is integrally coupled to at least one of the conductive coils by a powder sintering method and functions as a support assembly. The induction heating assembly according to claim 21, characterized in that.

23. An aerosol generating device including 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 according to any one of claims 13 to 22, The power supply assembly is electrically connected to the induction heating assembly and is used to supply power to the induction heating assembly. An aerosol generating device, characterized in that.

24. An aerosol generating device including 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 energized, whereby the susceptor generates heat by electromagnetic induction to heat the aerosol-generating product, and the conductive coil is the conductive coil according to any one of claims 1 to 12, The aerosol-generating device, wherein the power supply assembly is electrically connected to the induction heating assembly and is used to supply power to the induction heating assembly.

Images