An air flow heating component and an aerosol generating device

Abstract

The present invention discloses an air flow heating component and an aerosol generating device, which are used to heat an aerosol generating article to generate aerosol. The air flow heating component includes: a gas guiding element, which is provided with a first installation cavity and a plurality of through gas guiding channels for gas to flow through; a magnetic heating element, which is arranged in the first installation cavity. The magnetic heating element is driven by alternating current to generate an alternating magnetic field, and the magnetic heating element generates heat in the alternating magnetic field to heat the gas guiding element, so that the gas guiding element heats the air flow flowing through the gas guiding channels. Compared with the traditional electromagnetic induction heating method, the magnetic heating element has fewer components, which can effectively reduce the volume of the air flow heating component. At the same time, its heating efficiency is also effectively improved, improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of aerosol generating devices, and more specifically to an air flow heating component and an aerosol generating device. Background Art

[0002] With the development and popularization of the heat-not-burn technology, the application of aerosol generating devices is becoming more and more widespread. The most important component in an aerosol generating device is the heating device, which heats the aerosol generating article so that the aerosol generating article can generate smoke. Currently, there are also solutions for heating the aerosol generating article by heating the air flow, but they are relatively large in volume and high in power consumption. Summary of the Invention

[0003] The present invention provides an air flow heating component and an aerosol generating device to solve the above technical problems.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The embodiments of the present application provide an air flow heating component and an aerosol generating device, which can reduce power consumption and improve the heating efficiency of the air flow heating component.

[0006] The embodiments of the present application provide an air flow heating component for heating an aerosol generating article to generate aerosol. The air flow heating component includes a gas guiding element and a magnetic heating body. The gas guiding element is provided with a first installation cavity and a plurality of through gas guiding channels for gas to flow through. The magnetic heating body is disposed in the first installation cavity. The magnetic heating body is driven by alternating current to generate an alternating magnetic field, and the magnetic heating body generates heat in the alternating magnetic field to heat the gas guiding element, so that the gas guiding element heats the air flow flowing through the gas guiding channels.

[0007] The embodiments of the present application provide an aerosol generating device, including a housing, a power supply component, a circuit component, and the above-mentioned air flow heating component. The housing is provided with a receiving cavity. The power supply component, the circuit component, and the air flow heating component are all disposed in the receiving cavity. The power supply component, the circuit component, and the magnetic heating body are electrically connected to each other. Wherein the circuit component includes an inverter circuit for converting the direct current supplied by the power supply component into alternating current and supplying the alternating current to the magnetic heating body.

[0008] An embodiment of the present application further provides an air flow heating component, which is used to heat an aerosol generating article to generate aerosol. The air flow heating component includes a graphite air guiding element and a self-inductive heating element. A first installation cavity and a plurality of air guiding channels surrounding the first installation cavity are provided in the center of the graphite air guiding element; the self-inductive heating element is arranged in the first installation cavity. The self-inductive heating element is driven by alternating current to generate an alternating magnetic field, and the self-inductive heating element generates heat in the alternating magnetic field to heat the graphite air guiding element; the graphite air guiding element heats the air flow flowing through the air guiding channels, so that the heated hot air flow heats the aerosol generating article.

[0009] The air flow heating component in the embodiment of the present application includes an air guiding element and a magnetic heating element. The air guiding element is provided with a first installation cavity and a plurality of air guiding channels. The magnetic heating element is arranged in the first installation cavity, and the magnetic heating element is electrically connected to an external alternating current power supply. When the external power supply supplies power to the magnetic heating element, the magnetic heating element can generate an alternating magnetic field, and the magnetic heating element generates heat in the alternating magnetic field to heat the air guiding element, thereby heating the air flow flowing through the air guiding channels. Compared with the traditional electromagnetic induction heating method, the magnetic heating element has fewer components, which can effectively reduce the volume of the air flow heating component. At the same time, compared with a pure resistive heating element, the heating efficiency of the magnetic heating element is also effectively improved, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is an exploded view of some components of the air flow heating component in the embodiment of the present application.

[0011] Figure 2 is a schematic view of one perspective of the air guiding element of the air flow heating component in the embodiment of the present application.

[0012] Figure 3 is Figure 1 an enlarged view of one embodiment of the partial area A in

[0013] Figure 4 is a cross-sectional view of one perspective of the air guiding element of the air flow heating component in the embodiment of the present application.

[0014] Figure 5 is an exploded view of one perspective of the air flow heating component in the embodiment of the present application.

[0015] Figure 6 is an assembly schematic diagram of the air guiding element and the magnetic heating element in another embodiment of the present application.

[0016] Figure 7 is an assembly schematic diagram of the air guiding element and the magnetic heating element in another embodiment of the present application.

[0017] Figure 8It is a cross-sectional view of a heat insulation component of the air flow heating component according to an embodiment of the present application from a perspective.

[0018] Figure 9 It is a cross-sectional view of a perspective of the air flow heating component according to an embodiment of the present application.

[0019] Figure 10 It is an exploded view of a perspective of an aerosol generating device according to an embodiment of the present application. Detailed Description of the Invention

[0020] For ease of understanding the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for facilitating the description 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 thus cannot be construed as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not used to limit the present application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0022] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] The following will be combined with Figures 1 - 10 , and a detailed description will be given of an air flow heating component and an aerosol generating device involved in an embodiment of the present application. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation to the present application.

[0024] Please refer to Figure 1, the air flow heating component 100 is usually a micro heating element, which is mostly used for heating products such as aerosol generating articles. The air flow heating component 100 includes a gas guiding element 10 and a magnetic heating body 20. The magnetic heating body 20 is disposed inside or on the outer peripheral surface of the gas guiding element 10, and the magnetic heating body 20 is electrically connected to an external AC power supply. The gas guiding element 10 is in contact with or closely attached to at least a part of the aerosol generating article. When the external AC power supply provides alternating current to the magnetic heating body 20, the magnetic heating body 20 can generate an alternating magnetic field, and the magnetic heating body 20 can increase the resistance due to the skin effect in the alternating magnetic field, thereby generating heat, thereby heating the gas guiding element 10, and further heating the aerosol generating article near the gas guiding element 10 to generate aerosol. Compared with a pure resistive heating body, the magnetic heating body 20 has a higher heating efficiency, which helps to improve the user experience of the product. It should be noted that the close attachment described in this article means that the gap distance between two objects close to each other is 0 to 2 millimeters.

[0025] It can be understood that in some embodiments, the magnetic heating body 20 can also be referred to as a self-inductive heating body. The self-inductive heating body can generate heat in its own generated alternating magnetic field and transfer the heat to the gas guiding element 10.

[0026] It can be understood that in some embodiments, the gas guiding element 10 can include graphite or graphite alloy. Since graphite or graphite alloy has certain magnetic induction properties, when the external AC power supply provides alternating current to the magnetic heating body 20, the magnetic heating body 20 can not only generate an alternating magnetic field, but also increase the resistance of the magnetic heating body 20 due to the skin effect and generate heat, thereby heating the gas guiding element 10. In addition, the gas guiding element 10 itself will also be affected by the magnetic field and generate eddy currents, and generate a certain amount of heat; it can be understood that the heat of the gas guiding element at least includes the part of its own heat generation and the part conducted by the magnetic heating body 20; in actual situations, most of the heat of the gas guiding element 10 is conducted by the magnetic heating body 20.

[0027] For the above-mentioned gas guiding element 10, please refer to Figure 2 and Figure 4 , the gas guiding element 10 is provided with a first installation cavity 11 and a plurality of through gas guiding channels 12. The first installation cavity 11 is used for installing the magnetic heating body 20, and the gas guiding channels 12 are used for gas to flow through. In some embodiments, in order to improve the heating efficiency of the aerosol generating article, it is necessary to make the aperture of the gas guiding channel 12 as large as possible, which can effectively increase the flow rate of the heated air flow. For example, the diameter D1 of the gas guiding channel 12 satisfies: 0.01mm < D1 ≤ 3mm. In some other embodiments, the diameter D1 of the gas guiding channel 12 satisfies: 0.1mm < D1 ≤ 1mm.

[0028] In some embodiments, the first installation cavity 11 may be a through hole penetrating the air guiding element 10, or a blind hole with a cavity bottom. There is no limitation in the embodiments of the present application, as long as the first installation cavity 11 can accommodate the magnetic heating element 20 and can perform heat exchange with the magnetic heating element 20.

[0029] It can be understood that, in some embodiments, the air guiding element 10 may include graphite or graphite alloy. Since graphite or graphite alloy has good thermal conductivity, installing the magnetic heating element 20 inside the air guiding element 10 made of graphite or graphite alloy can reduce heat loss, greatly improve the heat transfer rate between the magnetic heating element 20 and the air guiding element 10, and at the same time, the temperature of the air guiding element 10 changes quickly, which is beneficial to quickly heating the airflow flowing through the air guiding channel 12. In some other embodiments, the air guiding element 10 may only partially include graphite or graphite alloy. For example, the inner wall of the first installation cavity 11 includes graphite or graphite alloy, or one end of the air guiding element 10 close to the aerosol generating article includes graphite or graphite alloy. That is, a part of the air guiding element 10 is made of graphite or graphite alloy material. On the premise of ensuring the heating efficiency of the air guiding element 10, the material usage of graphite or graphite alloy can be reduced, thereby reducing production costs, and at the same time, it can also prevent adhesion of e-liquid, etc., which is beneficial to cleaning.

[0030] The temperature coefficient of resistance (TCR) represents the relative change in the resistance value when the temperature of the resistance changes by 1 degree Celsius. The larger the temperature coefficient of resistance, the greater the change in the resistance value of the material when the temperature changes by 1 degree Celsius. For the above-mentioned magnetic heating element 20, please refer to Figure 1 To improve the heating efficiency of the magnetic heating element 20, a material with a relatively high temperature coefficient of resistance can be selected to make the magnetic heating element 20. As an embodiment, the magnetic heating element 20 may include at least one of ferromagnetic material and soft magnetic material. Ferromagnetic materials include ferromagnetic iron or ferromagnetic steel; soft magnetic materials include permalloy or ferroaluminum alloy.

[0031] In some embodiments, the magnetic heating element 20 is a magnetic coil. Please refer to Figure 1, the shape of the magnetic coil is spiral, and preferably, the diameter dimensions of the spiral-formed magnetic coil along its axis direction are substantially the same, which is conducive to installing the magnetic coil in the first installation cavity 11 of the air guiding element 10. The cross-section of the magnetic coil can be various shapes, such as circular, oval, rectangular, parallelogram, plum blossom-shaped, square, etc. In some embodiments, the magnetic heating element 20 can be sheet-shaped, or can be formed by repeatedly bending a sheet-shaped magnetic heating element. In some embodiments, at least a part of the magnetic heating element 20 is formed by spiraling a magnetic heating wire, and a plurality of ventilation air gaps 21 are formed during the spiraling process of the magnetic heating wire. The ventilation air gaps 21 can allow the air flow to pass through, so that the air flow flowing through the magnetic heating element 20 is directly heated, effectively reducing the loss of heat transfer. As an embodiment, the first installation cavity 11 can be a through hole, and the magnetic heating wire having the ventilation air gaps 21 is installed in the first installation cavity 11, so that part of the air flow is directly heated by the magnetic heating wire in the first installation cavity 11 and then flows through the air guiding element 10.

[0032] Since there is graphite or graphite alloy material in the air guiding element 10, the air guiding element 10 has electrical conductivity, and the magnetic heating element 20 is electrically connected to an external AC power supply. In order to prevent accidental electrical conduction of the air flow heating assembly 100, the surface of the magnetic heating element 20 needs to be insulated, thereby improving the reliability and safety of the product. In some embodiments, please refer to Figure 3 , the air flow heating assembly 100 further includes a first insulating layer 30, and the first insulating layer 30 is wrapped around the outer surface of the magnetic heating element 20. The first insulating layer 30 can prevent electrical conduction between the energized magnetic heating element 20 and the air guiding element 10, so as not to affect the resistance value and cause safety hazards, ensuring the effective and safe use of the magnetic heating element 20.

[0033] Please refer to Figure 4 , in some other embodiments, the air flow heating assembly 100 can further include a second insulating layer 40, and the second insulating layer 40 covers the inner wall surface of the first installation cavity 11. The second insulating layer 40 isolates the electrical contact between the air guiding element 10 and the magnetic heating element 20. It can be understood that the air flow heating assembly 100 can be provided with both the first insulating layer 30 and the second insulating layer 40, or can be provided with only the first insulating layer 30 on the surface of the magnetic heating element 20 or only the second insulating layer 40 on the inner wall of the first installation cavity 11. As an embodiment, the first insulating layer 30 can include glass glaze or nano-ceramic coating or other materials with insulating functions. The second insulating layer 40 can include glass glaze or nano-ceramic coating or other materials with insulating functions.

[0034] During the installation process of the magnetic heating element 20 and the air guiding element 10, in order to ensure as much as possible that the heat generated by the magnetic heating element 20 can be better transferred to the air guiding element 10, therefore, it is better that the outer surface of the magnetic heating element 20 is directly attached to the inner wall surface of the first installation cavity 11 of the air guiding element 10. However, due to the errors in the processing technology and the assembly requirements, in some cases, there can only be a near fit or a certain gap between the outer wall surface of the assembled magnetic heating element 20 and the inner wall surface of the first installation cavity 11. Therefore, please refer to Figure 5 , in some embodiments, the air flow heating assembly 100 may further include a heat conducting member 50. The heat conducting member 50 is disposed between the magnetic heating element 20 and the air guiding element 10, and the heat conducting member 50 is at least partially in contact with the magnetic heating element 20 and the air guiding element 10 respectively to ensure that the heat transfer efficiency among the three is at a good level.

[0035] In some embodiments, the heat conducting member 50 includes at least one of materials such as an enamel layer, ceramic glue, or metal fusibility. Of course, in some embodiments, the heat conducting member 50 can have the characteristics of both heat conduction and insulation, so that it is possible to reduce the additional setting of the first insulating layer 30 or the second insulating layer 40, thereby reducing the processing technological process of the air flow heating assembly 100.

[0036] As an embodiment, the number of the magnetic heating elements 20 is two or more. In some embodiments, the air guiding element 10 is also provided with two or more first installation cavities 11, and each magnetic heating element 20 is installed in one first installation cavity 11. During the actual production process, two or more first installation cavities 11 can be linearly arrayed, or circularly arrayed, or point-shot distributed, or randomly distributed, etc. on the air guiding element 10 according to requirements. In some embodiments, the multiple magnetic heating elements 20 can also be electrically conductive, for example, they can be connected in parallel or in series according to actual needs.

[0037] In some embodiments, please refer to Figure 6 and Figure 7 , the shape of the magnetic heating element 20 is sheet-like. In some embodiments, the air guiding element 10 includes two or more split parts stacked in sequence, and the sheet-like magnetic heating element 20 is disposed between the two split parts. In some embodiments, the first installation cavity 11 is a flat groove for inserting the sheet-like magnetic heating element 20. In some embodiments, the magnetic material of the sheet-like magnetic heating element 20 is bent or repeatedly bent.

[0038] It can be understood that, in some embodiments, please refer to Figure 5 and Figure 8, the air flow heating assembly 100 further includes a heat preservation assembly 60. The heat preservation assembly 60 is provided with a receiving cavity 611. One part of the receiving cavity 611 is used to receive the air guiding element 10, and the other part of the receiving cavity 611 is used to receive the aerosol generating article. Of course, in addition to the above two parts, the receiving cavity 611 can also have other parts. The heat preservation assembly 60 is used to install the air guiding element 10. At the same time, the heat preservation assembly 60 can also reduce the heat loss of the air guiding element 10, so that the heat of the air guiding element 10 is mainly transferred to the aerosol generating article inserted into the receiving cavity 611. The heat preservation assembly 60 can also store heat, so that after the magnetic heating element 20 stops generating heat, the air guiding element 10 and the heat preservation assembly 60 can still use the residual heat to heat the aerosol generating article in the receiving cavity 611.

[0039] As an embodiment, the heat preservation assembly 60 includes an inner tube part 61 and an outer tube part 62. The inner tube part 61 is provided with the above-mentioned receiving cavity 611. The outer tube part 62 is disposed around the outside of the inner tube part 61, and a cavity 63 is jointly formed between the outer tube part 62 and the inner tube part 61. The cavity 63 can be closed or communicate with the outside. An inert gas or a material with a thermal conductivity lower than 2W / m·k can be filled in the cavity 63, which can slow down the heat of the inner tube part 61 from being transferred to the outer tube part 62 too quickly to a certain extent. In some embodiments, in order to enable the heat of the inner tube part 61 to be transferred to the aerosol generating article inserted into the receiving cavity 611, the circumferential outer surface of the aerosol generating article is attached or closely attached to the inner wall surface of the inner tube part 61. In some other embodiments, the heat preservation assembly 60 can of course also be a single-layer tube, and the inner wall surface of the single-layer tube is attached or closely attached to the circumferential outer surface of the aerosol.

[0040] In some embodiments, please refer to Figure 5 and Figure 9 , in order to further reduce the heat transfer from the air guiding element 10 to the heat preservation assembly 60, the air flow heating assembly 100 further includes a ceramic sleeve 70. The ceramic sleeve 70 is disposed between the air guiding element 10 and the heat preservation assembly 60, and at least a part of the air guiding element 10 is connected to the heat preservation assembly 60 through the ceramic sleeve 70. On the one hand, the ceramic sleeve 70 has the function of connecting and installing the air guiding element 10 on the heat preservation assembly 60; on the other hand, the ceramic sleeve 70 has the function of heat insulation, preventing the air guiding element 10 from directly contacting the heat preservation assembly 60. The temperature of the heat preservation assembly 60 provided with the ceramic sleeve 70 is lower than that of the heat preservation assembly 60 without the ceramic sleeve 70.

[0041] In some embodiments, please refer to Figure 5 and Figure 9, the air flow heating component 100 further includes a cover plate 80, and the cover plate 80 is disposed at one end of the heat insulation component 60 away from the aerosol generating article. As an embodiment, a first abutting portion 64 is provided on the inner wall surface of the heat insulation component 60, and one end of the air guiding element 10 abuts against the first abutting portion 64, and the other end of the air guiding element 10 abuts against the cover plate 80. The cover plate 80 cooperates with the first abutting portion 64 to fix the air guiding element 10 in the receiving cavity 611 of the heat insulation component 60. It can be understood that in some other embodiments, please refer to Figure 4 , when the first installation cavity 11 of the air guiding element 10 is a through hole, a second abutting portion 111 is provided on the inner wall of the first installation cavity 11, or the magnetic heating element 20 is provided with a second abutting portion 111. The cover plate 80 cooperates with the second abutting portion 111 to fix the magnetic heating element 20 in the first installation cavity 11. It should be noted that when the second abutting portion 111 and the second insulating layer 40 are provided on the inner wall of the first installation cavity 11, the second insulating layer 40 needs to cover the second abutting portion 111.

[0042] In the embodiment of the present application, the air flow heating component 100 includes an air guiding element 10 and a magnetic heating element 20. The air guiding element 10 is provided with a first installation cavity 11 and a plurality of air guiding channels 12. The magnetic heating element 20 is disposed in the first installation cavity 11, and the magnetic heating element 20 is electrically connected to an external AC power supply. When the external power supply supplies power to the magnetic heating element 20, the magnetic heating element 20 can generate an alternating magnetic field, and the magnetic heating element 20 generates heat in the alternating magnetic field to heat the air guiding element 10, thereby heating the air flow flowing through the air guiding channels 12. Compared with the traditional electromagnetic induction heating method, the magnetic heating element 20 has fewer components, which can effectively reduce the volume of the air flow heating component 100. At the same time, its heating efficiency is also effectively improved, improving the user experience.

[0043] Based on the same concept, the present application further provides an aerosol generating device 1000. Please refer to Figure 10 , the aerosol generating device 1000 includes a housing 200, a power supply component 300, a circuit component 400, and the air flow heating component 100 as described above. The housing 200 is provided with a receiving cavity, and the power supply component 300, the circuit component 400, and the air flow heating component 100 are all installed in the receiving cavity 611, and the receiving cavity 611 of the air flow heating component 100 is communicated with the outside, so that the aerosol generating article can be inserted into the receiving cavity 611. The power supply component 300 provides an alternating current to the air flow heating component 100 through the circuit component 400, so that the air flow heating component 100 can heat the aerosol generating article.

[0044] As an embodiment, the circuit component 400 includes an inverter circuit, and the inverter circuit converts the direct current of the power supply component 300 into alternating current and supplies the alternating current to the magnetic heating element 20.

[0045] It can be understood that in some embodiments, the power supply component 300 may include multiple batteries, and the multiple batteries are electrically connected in series, which can increase the voltage of the entire power supply component 300, thereby increasing the power supply voltage to the magnetic heating element 20.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air flow heating component, characterized in that, For heating an aerosol - generating article to generate an aerosol, the air - flow heating assembly comprises: A gas - guiding element, provided with a first installation cavity and a plurality of through - gas - guiding channels for gas to flow through; A magnetic heating body, arranged in the first installation cavity, the magnetic heating body is driven by alternating current to generate an alternating magnetic field, and the magnetic heating body generates heat in the alternating magnetic field to heat the gas - guiding element, so that the gas - guiding element heats the air flow flowing through the gas - guiding channels; At least a part of the magnetic heating body is formed by spiraling a magnetic heating wire, and a plurality of ventilation air - gaps are formed during the spiraling of the magnetic heating wire; The air - flow heating assembly further comprises a first insulating layer, which is arranged on the outer surface of the magnetic heating body; and / or The air - flow heating assembly further comprises a second insulating layer, which is arranged on the inner surface of the first installation cavity; The air - flow heating assembly further comprises a heat - conducting member, which is arranged between the magnetic heating body and the gas - guiding element, and the heat - conducting member is at least partially in contact with the magnetic heating body and the gas - guiding element respectively; the heat - conducting member comprises an enamel layer, or ceramic glue, or a metal - fusible material; The number of the magnetic heating bodies is two or more, the gas - guiding element is provided with the same number of the first installation cavities as the number of the magnetic heating bodies, and each magnetic heating body is arranged in one of the first installation cavities; The air - flow heating assembly further comprises a heat - preservation assembly, which is provided with a receiving cavity for accommodating the aerosol - generating article and the gas - guiding element; Wherein, the heat - preservation assembly comprises an inner tube part and an outer tube part, the receiving cavity is arranged inside the inner tube part, the outer tube part is arranged around the inner tube part, a cavity is jointly enclosed between the outer tube part and the inner tube part, and the inner wall of the inner tube part is closely attached to the aerosol - generating article; or The heat - preservation assembly is a single - layer tube, and the inner wall of the single - layer tube is closely attached to the aerosol - generating article; The air - flow heating assembly further comprises a ceramic sleeve, which is arranged between the gas - guiding element and the heat - preservation assembly, and at least a part of the gas - guiding element is connected to the heat - preservation assembly through the ceramic sleeve.

2. The air - flow heating assembly according to claim 1, wherein The gas - guiding element comprises graphite; or The part of the gas - guiding element adjacent to the aerosol - generating article comprises graphite.

3. The air - flow heating assembly according to claim 1, wherein The air - flow heating assembly further comprises a cover plate, which is arranged at an open end of the heat - preservation assembly; A first abutting part is arranged on the heat - preservation assembly; The gas - guiding element is fixed in the receiving cavity through the first abutting part and the cover plate.

4. The air - flow heating assembly according to claim 1, wherein It further comprises a cover plate; At least one of the inner wall of the first installation cavity and / or the magnetic heating body is provided with a second abutting part; The magnetic heating body is fixed in the first installation cavity through the second abutting part and the cover plate.

5. An aerosol generating device, characterized in that, Comprising a housing, a power supply component, a circuit component, and an air flow heating component as described in any one of claims 1-4, the housing is provided with a receiving cavity, the power supply component, the circuit component, and the air flow heating component are all arranged in the receiving cavity, and the power supply component, the circuit component, and the magnetic heating element are electrically connected to each other; Wherein the circuit component includes an inverter circuit, and the inverter circuit is used to convert the direct current supplied by the power supply component into alternating current and supply the alternating current to the magnetic heating element.

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