Heating device and electromagnetic atomizer

Abstract

The embodiment of the invention provides a heating device and an electromagnetic atomizer, the heating device comprises a heating body and an induction coil, and the heating body is used for atomizing an aerosol generating substrate in the electromagnetic atomizer; the induction coil is wound on the peripheral side of the heating body and comprises multiple layers of sub-coils, each layer of sub-coil surrounds the peripheral side of the heating body, and the multiple layers of sub-coils are arranged around the heating body in a layer-by-layer nested mode in the radial direction of the heating body and used for generating a changing magnetic field so that the heating body can generate heat. According to the heating device provided by the embodiment of the invention, the induction coil is formed by arranging the multiple layers of sub-coils in the radial layer-by-layer nesting mode, on one hand, the magnetic field intensity is increased, so that the heating body rapidly rises to the temperature of an atomized aerosol generating matrix, aerosol is rapidly generated, the atomization efficiency is improved, and the effect of stopping after pumping is achieved; and on the other hand, the size of the induction coil in the axial direction can be reduced, so that the induction coil can generate an enough magnetic field for the heating body to generate heat under the condition that the axial size is small.

Description

Technical Field

[0001] The present application relates to the field of atomization technology, and in particular to a heating device and an electromagnetic atomizer. Background Art

[0002] Atomizer is a device that heats the aerosol-generating matrix to produce aerosol for users to inhale. In the related art, the atomizer uses resistance heating to atomize the aerosol-generating matrix, but the heating temperature of the resistance heating method is too high, causing the aerosol-generating matrix to be overburned or even scorched, resulting in low quality of the generated aerosol and poor user experience. Summary of the invention

[0003] In view of this, the embodiments of the present application hope to provide a heating device and an electromagnetic atomizer with high atomization efficiency and high user experience.

[0004] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a heating device for an electromagnetic atomizer, comprising:

[0006] A heating element for atomizing the aerosol-generating matrix in the electromagnetic atomizer;

[0007] The induction coil is wound around the heating element, and includes multiple layers of sub-coils. Each layer of the sub-coils surrounds the heating element, and the multiple layers of sub-coils are nested in layers around the heating element along the radial direction of the heating element to generate a changing magnetic field to enable the heating element to generate heat.

[0008] In some embodiments, along the axial direction of the induction coil, the opposite ends of the heating element do not exceed the opposite ends of the sub-coils in any one layer.

[0009] In some implementation schemes, the inner diameter of the sub-coil close to the heating element is 3 mm to 10 mm.

[0010] In some embodiments, the heating element is in the form of a sheet or a hollow tube.

[0011] In some embodiments, the heating element has a thickness of 0.1 mm to 0.5 mm.

[0012] In some implementations, the sub-coils are connected in series.

[0013] In some embodiments, the axial center of the heating element and the axial center of the induction coil are located on a straight line.

[0014] In some embodiments, the heating element has a plurality of through holes penetrating the heating element along the thickness direction.

[0015] The present application provides an electromagnetic atomizer, comprising:

[0016] case;

[0017] Circuit boards and power supply components,;

[0018] And the heating device described in any embodiment of the present application, the circuit board, the power supply component, and the heating device are arranged in the shell, the circuit board is connected to the power supply component, and the induction coil is electrically connected to the circuit board.

[0019] In some embodiments, the electromagnetic atomizer includes a mounting tube, the inner wall of the mounting tube encloses a hollow space, the heating element is disposed in the hollow space, and the induction coil is wound outside the mounting tube.

[0020] In some embodiments, the heating element is in the shape of a hollow cylinder for insertion of the aerosol generating substrate segment; or, the heating element can be inserted into the aerosol generating substrate segment.

[0021] In some embodiments, the shell has a liquid storage tank, which is used to store a fluid aerosol-generating matrix, and the electromagnetic atomizer includes a liquid guide, which is used to guide the aerosol-generating matrix in the liquid storage tank to the heating element.

[0022] The heating device provided in the embodiment of the present application adopts electromagnetic heating to atomize the aerosol generating matrix, and the temperature control is accurate, which is convenient for the heating element to obtain a suitable heating temperature, and can reduce the probability of overburning or even scorching of the aerosol generating matrix to produce harmful substances by using resistance heating, thereby increasing the user experience; the induction coil is formed by a plurality of layers of sub-coils which are nested in layers radially around the heating element. On the one hand, the magnetic field strength is increased so that the heating element can quickly rise to the temperature of the atomized aerosol generating matrix, quickly generate aerosol, increase the atomization efficiency, and achieve the effect of stopping and starting; on the other hand, the axial size of the induction coil can be reduced, so that the induction coil can generate sufficient magnetic field for the heating element to generate heat even when the axial size is small, thereby reducing the axial size of the heating device and facilitating installation in the electromagnetic atomizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of an electromagnetic atomizer according to an embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of the coordination structure of the induction coil and the heating element;

[0025] Figure 3 for Figure 1 An exploded schematic diagram of the induction coil shown;

[0026] Figure 4 It is a schematic diagram of the cooperation between the heating element and the liquid guide member;

[0027] Figure 5 Another schematic diagram of the coordination between the heating element and the liquid guide member.

[0028] Description of Reference Numerals

[0029] 1-electromagnetic atomizer; 10-heating element; 10a-through hole; 11-induction coil; 111-sub-coil; 12-housing; 12a-liquid storage tank; 13-circuit board; 14-installation tube; 14a-hollow space; 15-magnetic shielding member; 16-liquid guide member. DETAILED DESCRIPTION

[0030] In the description of the embodiments of the present application, it should be noted that the terms "inside", "outside", "axial", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] An embodiment of the present application provides a heating device for an electromagnetic atomizer 1 , wherein the heating device includes a heating element 10 and an induction coil 11 .

[0034] The present application embodiment provides an electromagnetic atomizer 1, see Figure 1 , including a shell 12, a circuit board 13, a power supply component and a heating device of any embodiment of the present application.

[0035] The electromagnetic atomizer 1 is used to atomize an aerosol generating substrate by electromagnetic heating to generate an aerosol for use by the user. The aerosol generating substrate includes but is not limited to medicines, nicotine-containing materials or nicotine-free materials. The aerosol generating substrate can be in liquid or solid state, which is not limited here.

[0036] The circuit board 13, the power supply assembly and the heating device are arranged in the shell 12. While providing installation space for the circuit board 13, the power supply assembly and the heating device, the shell 12 also protects the circuit board 13, the power supply assembly and the heating device and prevents the heat generated by the heating device from being directly transferred to the user.

[0037] The heating element 10 is used to atomize the aerosol-generating substrate in the electromagnetic atomizer 1 .

[0038] The induction coil 11 is wound around the heating element 10, and includes multiple layers of sub-coils 111. Each layer of sub-coils 111 is wrapped around the heating element 10. The multiple layers of sub-coils 111 are nested in layers around the heating element 10 along the radial direction of the heating element 10 to generate a changing magnetic field to enable the heating element 10 to generate heat.

[0039] It is understandable that the multi-layer sub-coil 111 can be spirally wound around the circumference of the heating element 10 to generate a sufficient alternating magnetic field to enable the heating element 10 to generate heat.

[0040] The design of the multi-layer sub-coil 111 can, on the one hand, increase the installation stability of the induction coil 11; on the other hand, it can improve the magnetic field strength and magnetic line density of the induction coil 11, enhance the coupling of the heating element 10 in the induction coil 11, thereby improving the heating efficiency of the heating element 10, and further improve the atomization efficiency, thereby enhancing the user experience.

[0041] It should be noted that the multi-layer sub-coils 111 are arranged in layers and nested around the heating element 10 in the radial direction. Figure 3 , which means that the multi-layer sub-coils 111 of the induction coil 11 are stacked layer by layer in the radial direction around the heating element 10 , and finally surround the circumference of the heating element 10 .

[0042] It should be noted that, in the multi-layer sub-coil 111 , the lengths of the sub-coils 111 along the radial direction may be the same or different, and multi-layer refers to two layers, three layers or more than three layers.

[0043] The circuit board 13 , the power supply assembly, and the heating device are arranged in the housing 12 . The circuit board 13 is connected to the power supply assembly, and the induction coil 11 is electrically connected to the circuit board 13 .

[0044] Specifically, the power supply component provides electrical energy to the circuit board 13, and the circuit board 13 outputs alternating current to the induction coil 11. When the alternating current is passed through the induction coil 11, an alternating magnetic field is generated, so that induced eddy currents are formed on the surface of the heating element 10 located in the alternating magnetic field. The heating element 10 generates heat energy by using the eddy currents and its own internal resistance, thereby atomizing the aerosol generating matrix.

[0045] It can be understood that the heating element 10 is a component with magnetic conductivity and electrical conductivity. For example, the heating element 10 can be a pure iron heating element 10, a stainless steel heating element 10, a low-carbon steel heating element 10 or other pure metal heating element 10 or an alloy heating element 10. The heating element 10 can also be other heating films with magnetic and electrical conductivity that contain metal materials.

[0046] In the related art, the atomizer uses resistance heating to heat the aerosol generating matrix. The resistance element is energized and heated by an external power supply. The heated resistance element transfers the heat to the aerosol generating matrix through heat conduction. Heat conduction has a lag, which may cause the aerosol generating matrix close to the resistance element to overburn or even burn, which not only affects the user experience, but also easily causes the release of harmful substances in the aerosol generating matrix, affecting the health of the user.

[0047] The heating device provided in the embodiment of the present application adopts electromagnetic heating to atomize the aerosol generating matrix, and the temperature control is accurate, which facilitates the heating element 10 to obtain a suitable heating temperature, and can reduce the probability of overburning or even scorching of the aerosol generating matrix to produce harmful substances due to resistance heating, thereby increasing the user experience; the induction coil 11 is formed by a multi-layer sub-coil 111 that is nested in layers radially around the heating element 10. On the one hand, the magnetic field strength is increased so that the heating element 10 can quickly rise to the temperature of the atomized aerosol generating matrix, quickly generate aerosol, increase the atomization efficiency, and achieve the effect of instant withdrawal and stop; on the other hand, the axial size of the induction coil 11 can be reduced, so that the induction coil 11 can generate sufficient magnetic field for the heating element 10 to generate heat even when the axial size is small, thereby reducing the axial size of the heating device and facilitating installation in the electromagnetic atomizer 1.

[0048] The cooperation method between the heating element 10 and the induction coil 11 is not limited. For example, in some embodiments, please refer to Figure 1The electromagnetic atomizer 1 includes a mounting tube 14, the inner wall of which encloses a hollow space 14a, the heating element 10 is arranged in the hollow space 14a, and the induction coil 11 is wound outside the mounting tube 14. In this way, the heating element 10 and the induction coil 11 can be assembled and fixed by the mounting tube 14.

[0049] For example, in some embodiments, the outer wall of the mounting tube 14 has a positioning groove extending in an axial spiral manner, the positioning groove is adapted to the shape of the sub-coil 111, and the sub-coil 111 close to the heating element 10 is embedded in the positioning groove to facilitate the induction coil 11 to be firmly fixed on the mounting tube 14.

[0050] It is understood that in some embodiments, please refer to Figure 1 The electromagnetic atomizer 1 also includes a magnetic shielding member 15, which is arranged on the circumferential outer side of the sub-coil 111 away from the heating element 10. That is to say, the induction coil 11 is located between the mounting tube 14 and the magnetic shielding member 15. On the one hand, the magnetic shielding member 15 can fix the induction coil 11, and on the other hand, the magnetic shielding member 15 can reduce the probability of the induction coil 11 radiating electromagnetic radiation to the outside.

[0051] The magnetic shielding member 15 can be fixedly connected to the induction coil 11 by bonding.

[0052] For some examples, see Figure 2 , along the axial direction of the induction coil 11, the two opposite ends of the heating element 10 do not exceed the two opposite ends of any layer of sub-coil 111, that is, any end of the heating element 10 along the axial direction does not exceed any end of any layer of sub-coil 111 along the axial direction, that is, see Figure 2 , the dimension H1 of the heating element 10 along the axial direction does not exceed the dimension H2 of the induction coil 11 along the axial direction, that is, H1≤H2.

[0053] It should be noted that Figure 2 Taking the middle direction as an example, the axial direction of the induction coil 11 is Figure 2 The up and down directions in the Figure 2 The left and right direction in .

[0054] It is understandable that the magnetic field distribution of the induction coil is parabolic, and the magnetic field strength at the axial center is the highest. From the axial center to the axial ends, the magnetic field strength will decay, affecting the heating rate of the heating element. Therefore, in this embodiment, the opposite ends of the heating element 10 do not exceed the opposite ends of any layer of sub-coils 111, and the entire structure of the heating element 10 is located under the alternating magnetic field generated by the induction coil 11, and can be arranged close to the axial center of the induction coil 11, further improving the heating efficiency of the heating element 10 and improving the atomization efficiency of the aerosol generation matrix.

[0055] For some examples, see Figure 2 The inner diameter D1 of the sub-coil 111 close to the heating element 10 is 3mm (millimeter) ~ 10mm, that is, 3mm≤D≤10mm, for example, 3mm, 3.2mm, 4mm, 4.5mm, 5mm, 5.3mm, 6mm, 6.4mm, 7mm, 7.6mm, 8mm, 8.7mm, 9mm, 9.8mm, 10mm, etc.

[0056] In this embodiment, the inner diameter of the sub-coil 111 close to the heating element 10 is appropriate, neither too large nor too small. On the one hand, the distance between the induction coil 11 and the heating element 10 is small, and the conversion efficiency of electromagnetic heat is high, which can further increase the rate at which the heating element 10 rises to the temperature of the atomized aerosol generating matrix. On the other hand, it does not affect the installation of the heating element 10, reduces the restriction on the size of the heating element 10, and makes the structural reliability of the heating device high.

[0057] The shape of the heating element 10 is not limited.

[0058] For example, in some embodiments, see Figure 4 , the heating element 10 is in sheet shape. The sheet heating element 10 is thin, which is convenient for increasing the heating rate, so that the atomization waiting time is short, and the surface of the sheet heating element 10 can dissipate heat outward, the heat is easy to dissipate, and there will be no safety hazards due to heat concentration, and the heating uniformity is good; and when the aerosol generating matrix is ​​in a solid shape such as a columnar solid, the sheet heating element 10 can be inserted into the aerosol generating matrix to form central heating for the aerosol generating matrix, and the heating element 10 transfers heat toward the inside of the aerosol generating matrix, and the aerosol generating matrix is ​​heated and atomized to generate aerosol.

[0059] For other examples, see Figure 5 The heating element 10 is in a hollow tubular structure. The heating element 10 in a hollow tubular shape has good structural strength and is easy to install and cooperate with the induction coil 11. In addition, when the aerosol generating matrix is ​​in a solid shape such as a columnar solid, the aerosol generating matrix can be inserted into the hollow tubular heating element 10, and the heating element 10 forms a circumferential heating on the aerosol generating matrix. The heating element 10 transfers heat toward the periphery of the aerosol generating matrix, and the aerosol generating matrix is ​​heated and atomized to generate aerosol.

[0060] For some examples, see Figure 5 The thickness H of the heating element 10 is 0.1 mm to 0.5 mm, that is, 0.1 mm ≤ H ≤ 0.5 mm, for example, 0.1 mm, 0.12 mm, 0.16 mm, 0.2 mm, 0.23 mm, 0.27 mm, 0.3 mm, 0.34 mm, 0.38 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc.

[0061] In this embodiment, the thickness of the heating element 10 is appropriate, which can not only improve the heating rate, but also reduce the manufacturing difficulty of the heating element 10, facilitate the installation and coordination of the heating element 10 with the mounting tube 14 and the induction coil 11, and increase the working reliability of the heating device.

[0062] In some embodiments, the sub-coils 111 are connected in series.

[0063] Specifically, a plurality of sub-coils 111 are connected in sequence to form a path, the coil currents of the sub-coils 111 are the same, and the generated inductance values ​​can be superimposed, so that it is convenient to provide a sufficient magnetic field to the heating element 10 .

[0064] In some embodiments, the axial center of the heating element 10 and the axial center of the induction coil 11 are located on a straight line.

[0065] In this way, when the induction coil 11 generates a magnetic field to the heating element 10, the temperature at the axial center of the heating element 10 is the highest, and the temperature gradually decreases from the axial center to the two ends. When the aerosol generating matrix begins to be atomized, the axial center of the heating element 10 can be quickly heated and atomized, and the user's atomization waiting time is short, which can improve the user experience.

[0066] For some examples, see Figure 4 and Figure 5 The heating element 10 has a plurality of through holes 10 a penetrating the heating element 10 in the thickness direction.

[0067] On the one hand, the contact area between the aerosol generating matrix and the heating element 10 can be increased, the atomization area can be increased, and the atomization efficiency can be improved. On the other hand, the aerosol generated after the aerosol generating matrix is ​​atomized can be discharged from the through hole 10a in a relatively orderly manner. The through hole 10a can be used as a channel for the heating device to discharge the aerosol, thereby improving the stability of the airflow.

[0068] It can be understood that the number of the through holes 10a can be two or more. Of course, in some other embodiments, the number of the through hole 10a can also be one.

[0069] The shape of the through hole 10a is not limited, and can be a circular hole, a square hole, a polygonal hole or other special-shaped holes, which is not limited here.

[0070] The combination of the heating element 10 and the aerosol generating substrate is not limited.

[0071] In some embodiments, the heating element 10 is in the shape of a hollow cylinder for insertion of the aerosol generating matrix segment.

[0072] In this embodiment, the aerosol generating matrix is ​​formed as a solid aerosol generating matrix segment, at least part of which is inserted into the heating element 10, and the induction coil 11 generates a magnetic field to cause the heating element 10 to generate heat. The heating element 10 transfers heat toward the periphery of the aerosol generating matrix segment to form circumferential heating of the aerosol generating matrix segment.

[0073] In this embodiment, the aerosol generating matrix segment can be columnar or in other shapes, and the aerosol generating matrix segment can also have at least one airway hole, which runs through at least one end of the aerosol generating matrix segment along the axial direction. The airway hole can provide a release space for the aerosol, thereby increasing the aerosol extraction rate.

[0074] In other embodiments, the heating element 10 can be inserted into the aerosol generating substrate segment.

[0075] In this embodiment, the aerosol generating matrix is ​​formed into a solid aerosol generating matrix segment, the heating element 10 is inserted into the aerosol generating matrix segment, the induction coil 11 generates a magnetic field to make the heating element 10 generate heat, and the heating element 10 transfers heat toward the center of the aerosol generating matrix segment to form central heating of the aerosol generating matrix segment.

[0076] For some examples, see Figure 1 The shell 12 has a liquid storage tank 12a, which is used to generate a matrix from a stored fluid-like aerosol. The electromagnetic atomizer 1 includes a liquid guide 16, which is used to guide the aerosol-generating matrix in the liquid storage tank 12a to the heating element 10.

[0077] In this embodiment, the aerosol generating matrix is ​​formed into a fluid state. When atomization is required, the liquid guide 16 guides the fluid aerosol generating matrix in the liquid storage tank 12a to the heating element 10, and the induction coil 11 generates a magnetic field to make the heating element 10 generate heat, thereby atomizing the fluid aerosol generating matrix to generate aerosol for the user to inhale.

[0078] It is understandable that when aerosol-generating substrates in a fluid state are atomized, the volume of the atomizer is small, and the installation space provided for the heating device is limited. When the aerosol-generating substrates are electromagnetically atomized, the magnetic field provided to the heating element is small, which affects the atomization efficiency of the heating element. Therefore, in this embodiment, by arranging the induction coil 11 into a structure in which multiple sub-coils 111 are nested layer by layer around the heating element 10 in a radial direction, when the installation space of the heating device is small, the induction coil 11 can also provide sufficient magnetic field for the heating element 10, so that the heating element 10 heats up quickly, thereby improving the atomization efficiency of the aerosol-generating substrate.

[0079] The liquid guiding member 16 can be liquid guiding cotton, or it can be an element made of porous solid material, for example, porous ceramics. The channels formed by multiple micropores connected together can guide the aerosol generating matrix in the liquid storage tank 12a to the heating element 10 through capillary action. Micropores refer to holes in a microscopic sense.

[0080] The matching manner of the heating element 10 and the liquid guide member 16 is not limited.

[0081] For some examples, see Figure 4 The heating element 10 is in sheet form, and the liquid guide member 16 is in plate form. One side surface of the heating element 10 along the thickness direction is adjacent to the liquid guide member 16. For example, the liquid guide member 16 is provided with a groove, and at least part of the heating element 10 is arranged in the groove. One side surface of the heating element 10 along the thickness direction is arranged adjacent to the bottom surface of the groove. The adjacent arrangement can be that one side surface of the heating element 10 along the thickness direction is in direct contact with the bottom surface of the groove, for example, fixed together by bonding. In this way, the liquid guide member 16 can provide sufficient force support for the heating element 10, improve the structural stability of the heating element 10, and the heating element 10 is not easy to bend, deform or even break while having a faster heating rate, thereby improving the service life of the heating element 10; the adjacent arrangement can also be that one side surface of the heating element 10 along the thickness direction is close to the bottom surface of the groove, but space is left to facilitate the outflow of the aerosol formed after the aerosol generation matrix is ​​atomized. At this time, the heating element 10 can be fixed in the groove by snapping or other connection methods, thereby increasing the structural stability of the heating element 10.

[0082] In some other embodiments, please refer to Figure 5 The heating element 10 is in a hollow cylindrical shape, and the liquid guiding member 16 is also in a hollow cylindrical shape. The circumferential outer surface of the heating element 10 is adjacent to the liquid guiding member 16. The adjacent arrangement may be that the circumferential outer surface of the heating element 10 is in direct contact with the inner surface of the liquid guiding member 16, so as to facilitate the installation and fixation of the heating element 10 and the liquid guiding member 16. For example, the circumferential outer surface of the heating element 10 and the inner surface of the liquid guiding member 16 can be fixed together by bonding; the adjacent arrangement may also be that the distance between the circumferential outer surface of the heating element 10 and the inner surface of the liquid guiding member 16 is relatively close, but a space is left to facilitate the outflow of the aerosol formed after the aerosol generating matrix is ​​atomized.

[0083] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0084] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heating device for an electromagnetic atomizer, characterized in that: include: A heating element for atomizing the aerosol-generating matrix in the electromagnetic atomizer; The induction coil is wound around the heating element, and includes multiple layers of sub-coils. Each layer of the sub-coils surrounds the heating element, and the multiple layers of sub-coils are nested in layers around the heating element along the radial direction of the heating element to generate a changing magnetic field to enable the heating element to generate heat.

2. The heating device according to claim 1, characterized in that Along the axial direction of the induction coil, the opposite ends of the heating element do not exceed the opposite ends of any layer of the sub-coil.

3. The heating device according to claim 1, characterized in that: The inner diameter of the sub-coil close to the heating element is 3 mm to 10 mm.

4. The heating device according to claim 1, characterized in that The heating element is in a sheet or hollow tube structure.

5. The heating device according to claim 4, characterized in that: The thickness of the heating element is 0.1 mm to 0.5 mm.

6. The heating device according to claim 1, characterized in that: The sub-coils are connected in series.

7. The heating device according to claim 4, characterized in that The axial center of the heating element and the axial center of the induction coil are located on a straight line.

8. The heating device according to claim 4, characterized in that: The heating element has a plurality of through holes penetrating the heating element along a thickness direction.

9. An electromagnetic atomizer, characterized in that: include: case; Circuit boards and power supply components,; And the heating device according to any one of claims 1 to 8, wherein the circuit board, the power supply assembly, and the heating device are arranged in the shell, the circuit board is connected to the power supply assembly, and the induction coil is electrically connected to the circuit board.

10. The electromagnetic atomizer according to claim 9, characterized in that: The shell has a liquid storage tank, which is used to store a fluid-like aerosol-generating matrix. The electromagnetic atomizer includes a liquid guide, which is used to guide the aerosol-generating matrix in the liquid storage tank to the heating element.

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