Heating module and aerosol generating device

Abstract

The heating module comprises a sensing body, a first tubular body, a second tubular body and an electromagnetic coil, a containing cavity for containing an aerosol generating product is formed in the sensing body, the first tubular body surrounds the periphery of the sensing body, and a closed first gas medium layer is arranged between the first tubular body and the sensing body; the second tubular body surrounds the periphery of the first tubular body, a closed second gas medium layer is arranged between the second tubular body and the first tubular body, and the electromagnetic coil surrounds the periphery of the second tubular body, so that the balance of small size, energy consumption effect and heat insulation effect of the susceptor is realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of aerosol generation technology, and in particular to a heating module and an aerosol generating device. Background Art

[0002] The aerosol generating device includes a heating module with a heating element. The heating element is used to electrically heat aerosol generating products such as cigarettes and cigars, so that the aerosol generating products generate aerosols without burning. At present, electromagnetic circumferential heating methods are widely used in the field of electronic cigarettes. In order to avoid the device being too large, existing products usually set the electromagnetic coil and the sensor very compactly, causing the electromagnetic coil to absorb heat and the temperature to rise, even exceeding 90°C, which in turn causes the surface temperature of the shell to be too high and the power consumption to be too high. Summary of the invention

[0003] In order to prevent the electromagnetic coil from being overheated and affecting power consumption and heat insulation effect, an embodiment of the present application provides a heating module, including:

[0004] A receptor, wherein the receptor has a receiving cavity for receiving the aerosol generating product;

[0005] A first tubular body, the first tubular body surrounds the outer periphery of the susceptor, and a sealed first gas medium layer is provided between the first tubular body and the susceptor;

[0006] A second tubular body, the second tubular body surrounds the periphery of the first tubular body, and a sealed second gas medium layer is provided between the second tubular body and the first tubular body; and

[0007] The electromagnetic coil is surrounded by the outer periphery of the second tubular body.

[0008] In some embodiments, the maximum thickness of the first gas medium layer is between 1.0 and 1.5 mm.

[0009] In some embodiments, the maximum thickness of the second gas medium layer is between 0.3 mm and 1.0 mm.

[0010] In some embodiments, a groove is provided on the periphery of the second tubular body, and the electromagnetic coil is arranged in the groove, or a convex rib is provided on the periphery of the second tubular body, and the electromagnetic coil is spaced apart from the convex rib.

[0011] In some embodiments, the heating module further includes a shell, which is disposed on the periphery of the electromagnetic coil, and a third gas medium layer is provided between the shell and the second gas medium layer.

[0012] The heating module and aerosol generating device provided in the embodiment of the present application are provided with a first tubular body surrounding the periphery of the sensing body, and a sealed first gas medium layer is formed between the first tubular body and the sensing body, a second tubular body is provided surrounding the periphery of the first tubular body, and a sealed second gas medium layer is formed between the second tubular body and the first tubular body, and an electromagnetic coil is provided at the periphery of the second tubular body to provide a magnetic field, so that the sensing body is induced to heat. By forming two sealed gas medium layers between the electromagnetic coil and the sensing body, the heat of the sensing body needs to pass through the first gas medium layer, the first tubular body, the second gas medium layer, and the second tubular body in sequence during the process of outward conduction to reach the electromagnetic coil. Not only can the heat be largely isolated, but also the heat conduction speed between the sensing body and the electromagnetic coil can be controlled, so as to avoid the electromagnetic coil being affected by the temperature of the sensing body and causing high temperature during the entire heating process; in addition, the overall solution is small in size and will not affect the coupling efficiency between the electromagnetic coil and the sensing body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0014] Figure 1 is a schematic diagram of an aerosol generating device provided by an embodiment;

[0015] Figure 2 is a schematic diagram of a heating module provided by an embodiment;

[0016] Figure 3 is a schematic diagram of a heating module provided by an embodiment;

[0017] Figure 4 is a schematic diagram of a heating module provided by an embodiment;

[0018] Figure 5 yes Figure 4 A partial enlarged view of the heating module.

[0019] In the figure:

[0020] 1. Aerosol generating products;

[0021] 2. Heating module; 21. Sensor; 22. Accommodating cavity; 23. First tubular body; 231. First partition; 24. Second tubular body; 241. Second partition; 242. Groove; 25. Electromagnetic coil; 26. Upper connecting seat; 27. Sealing silica gel; 28. Lower connecting seat; 29. ​​Housing;

[0022] 3. Gas dielectric layer; 31. First gas dielectric layer; 32. Second gas dielectric layer; 33. Third gas dielectric layer;

[0023] 4. Power supply;

[0024] 5. Circuit board;

[0025] 10. Aerosol generating device. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or suggesting the quantity or order of the indicated technical features relative to importance or implicitly indicating. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship or movement between the components under a certain specific posture (as shown in the accompanying drawings), and if the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

[0028] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be one or more central elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] Please refer to Figure 1 An embodiment of the present application provides an aerosol generating device 10, which is used to heat an aerosol generating product 1 so that the aerosol generating product 1 evaporates aerosol for inhalation by a user.

[0031] Aerosol-generating article 1 refers to an article comprising an aerosol-forming substrate that is intended to be heated rather than combusted to release volatile compounds that can form an aerosol. The aerosol formed by heating the aerosol-forming substrate may contain fewer components known to be hazardous than an aerosol produced by combustion or pyrolytic degradation of the aerosol-forming substrate. In an embodiment, the aerosol-generating article 1 is removably coupled to an aerosol-generating device. The aerosol-generating article 1 may be disposable or reusable.

[0032] The aerosol generating device 10 is a device that engages or interacts with the aerosol generating article 1 to form an inhalable aerosol. A power source 4 in the aerosol generating device 10 supplies energy to heat one or more components of the aerosol-forming substrate.

[0033] Please refer to Figure 1 The aerosol generating device 10 includes a heating module 2; the heating module 2 includes a susceptor 21, and the susceptor 21 is used to heat the aerosol-forming matrix of the aerosol generating product 1 to generate an aerosol. The susceptor 21 has a receiving cavity 22 inside, and the receiving cavity 22 can accommodate at least part of the aerosol generating product 1. The susceptor 21 is inductively heated under the electromagnetic field generated by the electromagnetic coil 25, and the electromagnetic energy is transmitted from the electromagnetic coil 25 to the susceptor 21. The susceptor 21 can heat the aerosol generating product 1 located in the receiving cavity 22 from the circumferential direction, so that the aerosol generating product 1 generates an aerosol. According to the different sizes of the aerosol generating product 1, the diameter d of the susceptor 21 is usually between 5.9 and 7.6 mm.

[0034] The aerosol generating device 10 also includes a power supply 4 for supplying power to the electromagnetic coil 25 and a circuit board 5. The circuit board 5 is provided with electronic components such as a processor. The processor can control the power output of the power supply 4 to the electromagnetic coil 25, for example, controlling the output current and output voltage of the battery 4. The overall operation of the aerosol generating device can also be controlled, for example, not only the operation of the power supply and the heating module can be controlled, but also the operation of other components in the aerosol generating device can be controlled; for example, the controller can determine whether the aerosol generating device can be operated by checking the status of the components of the aerosol generating device. The processor can include a logic gate array, or can include a combination of a general-purpose microprocessor and a memory storing executable programs in the microprocessor.

[0035] Please refer to Figure 1-5By reserving a certain distance between the susceptor 21 and the electromagnetic coil 25, a heat insulation component is arranged between the susceptor 21 and the electromagnetic coil 25, and the heat insulation component can effectively reduce the energy transmitted to the outside by the susceptor 21, and correspondingly reduce the temperature of the electromagnetic coil 25. In some embodiments, the temperature of the electromagnetic coil 25 can be kept below 60°C during the entire heating process, thereby reducing the surface temperature of the housing 29 and the power consumption.

[0036] Please refer to Figure 1-5 The heat insulation assembly includes a first tubular body 23, which is located outside the sensor 21, and the first tubular body 23 and the sensor 21 are at least partially non-contacted, and a sealed first gas medium layer is provided between the two. That is, the inner surface of the first tubular body 23 can define at least a partial boundary of the outer side of the first gas medium layer, and the outer surface of the sensor 21 can define at least a boundary of the inner side of the first gas medium layer 31. Figure 1-5 As shown, the first tubular body 23 and the susceptor 21 can directly serve as the outer side and the inner side of the first gas medium layer 31 to form the first gas medium layer 31 .

[0037] The heat insulation assembly further includes a second tubular body 24, which is located at the periphery of the first tubular body 23, and the second tubular body 24 and the first tubular body 23 are at least partially non-contacting, and a sealed second gas medium layer is arranged between the two. Specifically, the inner surface of the second tubular body 24 can define at least a partial boundary of the outer side of the second gas medium layer 25, and the outer surface of the first tubular body 23 can define at least a partial boundary of the inner side of the second gas medium layer 32. For example, the first tubular body 24 and the second tubular body 26 can directly serve as the inner side and the outer side of the second gas medium layer 32, thereby forming the second gas medium layer 32.

[0038] The second tubular body 24 not only serves as a heat insulation component, but also serves as a fixed carrier of the electromagnetic coil 25. Specifically, the electromagnetic coil 25 is arranged around the periphery of the second tubular body.

[0039] In some embodiments, the outer surface of the second tubular body 24 is provided with a groove 242, the groove 242 extends in a spiral shape along the axial direction of the outer surface of the second tubular body 24, and the electromagnetic coil 25 is wound around the periphery of the second tubular body 24 along the groove 242. In some embodiments, the outer surface of the second tubular body 24 is provided with a convex rib (not shown), the convex rib extends in a spiral shape along the axial direction of the outer surface of the second tubular body 24, and the electromagnetic coil 25 is arranged at intervals from the convex rib. By providing the groove 242 or convex rib on the outer surface of the second tubular body 24, the electromagnetic coil 25 is wound more tightly on the surface of the second tubular body 24, making the structure of the aerosol generating device 10 more stable. In some embodiments, the outer surface of the second tubular body 24 is provided with a longitudinal convex rib (not shown), and a plurality of notches are provided on the longitudinal convex rib, and the electromagnetic coil 25 is arranged at intervals from the notches, so that the electromagnetic coil 25 is wound and fixed between the plurality of notches, and in some cases, the spacing of the coil turns can be flexibly changed.

[0040] In one embodiment, the electromagnetic coil 25 spirally extends at equal intervals in the axial direction of the second tubular body 24. In other embodiments, the electromagnetic coil 25 spirally extends at non-equal intervals in the axial direction of the second tubular body 24, for example, the electromagnetic coil 25 has a smaller spacing in a portion close to the aerosol generating article insertion port, while the spacing in other portions is larger.

[0041] In some embodiments, the second tubular body 24 can have the same wall thickness as the first tubular body 23. In some embodiments, the second tubular body 24 can have a different wall thickness than the first tubular body 23. For example, the first tubular body 23 has a relatively thick wall thickness, which can be less than 10 mm, for example, between 5 mm and 10 mm, or between 3 mm and 5 mm, or between 1 mm and 3 mm; of course, a thinner thickness is also feasible, for example, between 0.1 mm and 1 mm, or about 0.3 mm. For example, based on the consideration of the small volume of the device, the thickness of the second tubular body 24 can be between 0.1 mm and 0.8 mm, for example, 0.5 mm.

[0042] In some embodiments, the first tubular body 23 and the second tubular body 24 include a heat-insulating material, which is conducive to hindering the first gas medium layer 31 from transferring heat outward. The heat-insulating material refers to a material whose thermal conductivity is less than 100 W / mK at 23°C and 50% relative humidity, preferably less than 40 W / mK or less than 10 W / mK. For example, the heat-insulating material may be made of at least one of a PAEK-type material, a PI material or a PBI material, wherein the PAEK-type material includes PEEK, PEKK, PEKEKK or PEK material; the heat-insulating material may also include aerogel. In some embodiments, the first tubular body 23 includes a heat storage material. The heat storage material refers to a material with high heat capacity. A material with high heat capacity may be a material with a specific heat capacity of at least 0.5 J / gK, such as at least 0.7 J / gK, such as at least 0.8 J / gK at 25°C and constant pressure. For example, the heat storage material may include but is not limited to glass fiber, glass felt, ceramic, silica, alumina, carbon and ore, or any combination thereof. In some embodiments, the second tubular body 24 is made of the same material as the first tubular body 23. In some embodiments, the second tubular body 24 is made of different materials than the first tubular body 23. In some embodiments, the first tubular body 23 and the second tubular body 24 include a combination of a heat insulating material and a heat storage material, or the first tubular body 23 and the second tubular body 24 include a combination of multiple heat insulating materials, or a combination of multiple heat storage materials.

[0043] In some embodiments, Figure 1-5 As shown, the thickness of the first gas dielectric layer 31 is uniform along the axial direction of the susceptor 21. In one embodiment, the thickness of the first gas dielectric layer 31 is non-uniform along the axial direction of the susceptor 21, wherein the area where the maximum thickness of the first gas dielectric layer 31 is located is set to coincide with the temperature concentration area of ​​the susceptor 21 in the radial projection direction. The temperature concentration area of ​​the susceptor 21 can be understood as the area with the highest temperature or heat density in the susceptor 21, usually in the middle and upper area of ​​the axial direction of the susceptor 21, or in the middle area. In some embodiments, the thickness of the second gas dielectric layer 32 can also be set to be uniform, or non-uniform like the first gas dielectric layer 31.

[0044] The side of the first gas dielectric layer 31 relatively close to the susceptor 21 is defined as the inner side, and the side of the first gas dielectric layer 23 extending outward along the inner side thereof, which is formed away from the susceptor 21, is defined as the outer side. Along the radial direction of the susceptor 21, there is a certain thickness between the inner side and the outer side of the first gas dielectric layer 31; in some embodiments, along the axial direction of the susceptor 21, the thickness inside the first gas dielectric layer 31 is not necessarily uniform, so the maximum value of the thickness between the inner side and the outer side of the first gas dielectric layer 31 is defined herein by setting a "maximum thickness"; when the thickness of the first gas dielectric layer 31 along the axial direction of the susceptor 21 is uniform, the maximum thickness can be understood as any thickness of the first gas dielectric layer 31 along the radial direction of the susceptor 21; when the thickness of the first gas dielectric layer 31 along the axial direction of the susceptor 21 is non-uniform, the maximum thickness can be understood as the maximum value of the thickness of the first gas dielectric layer 31 along the radial direction of the susceptor 21.

[0045] In some embodiments, in order to achieve a good heat insulation effect, reduce the heat conducted from the susceptor 21 to the electromagnetic coil 25 and slow down the heat transfer rate, the maximum thickness of the first gas medium layer 31 is set to be greater than 1.0 mm. In some embodiments, in order to further avoid weakening the coupling ability between the susceptor 21 and the electromagnetic coil 25 due to the large distance between the susceptor 21 and the electromagnetic coil 25, and to allow appropriate space for setting other heat insulation elements such as the second tubular body 24 and the second gas medium layer 32, the maximum thickness of the first gas medium layer 31 is set to be between 1.0 mm and 1.5 mm, for example, 1.0 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm.

[0046] In some embodiments, the maximum thickness of the second gas dielectric layer 32 may be between 0.3 mm and 1 mm. If the maximum thickness of the second gas dielectric layer 32 is set to be greater than 1.0 mm, although the time for the second gas dielectric layer 32 to reach dynamic thermal equilibrium can be extended, resulting in an increase in energy consumption, the coupling ability between the susceptor 21 and the electromagnetic coil 25 is weakened due to the large distance between the susceptor 21 and the electromagnetic coil 25. If the maximum thickness of the second gas dielectric layer 32 is set to be less than 0.3 mm, the heat insulation effect will not be achieved. Therefore, the maximum thickness of the sealed second gas dielectric layer 25 is set to a range greater than or equal to 0.3 mm and less than or equal to 1.0 mm, such as 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm.

[0047] In some embodiments, the temperature difference between the inside and outside of the first gas medium layer 23 is greater than the temperature difference between the inside and outside of the second gas medium layer 25. This can not only meet the requirements of thermal insulation, but also achieve the effect of reducing the power consumption of the sensor 21 through the two layers of gas medium layers with gradually decreasing heat exchange rates from the inside to the outside.

[0048] In some embodiments, Figure 3 As shown, a first partition 231 is further provided between the first tubular body 23 and the sensor 21. The first partition 231 divides the first gas medium layer 31 into at least two independent cavities, which can reduce the airflow inside the first gas medium layer 31 and avoid rapid heat loss, so that the first gas medium layer absorbs more heat from the sensor 21, thereby reducing energy consumption.

[0049] In some embodiments, the first partition plate 231 and the first tubular body 23 are integrally formed, and the structure is simpler, so that the sealing effect of the cavity is better.

[0050] In some embodiments, the first partition 231 includes a high temperature resistant heat insulating material, such as aerogel, which is helpful to prevent the first gas medium layer 31 from dissipating heat.

[0051] In some embodiments, the first partition 231 and the first tubular body 23 are assembled, and the materials of the first partition 231 and the first tubular body 23 are different or the same. For example, the first partition 231 is silicone or foam with good expansion performance. The first partition 231 is assembled and inserted between the first tubular body 23 and the sensor 21, so that the interior of the first gas medium layer 31 is divided into independent cavities.

[0052] In some embodiments, there are one or more first partitions 231 , and one or more first partitions 231 separate the first gas medium layer 31 into two or more independent cavities. The two or more gas-tight cavities are distributed along the axial direction of the sensor 21 .

[0053] In some embodiments, a second partition plate 241 may be provided in the second gas medium layer 32 to reduce the airflow inside the second gas medium layer 32 and improve the thermal insulation performance of the second gas medium layer 32. The material, configuration and assembly of the second partition plate 241 may refer to the first partition plate 231.

[0054] A shell 29 is further provided on the periphery of the electromagnetic coil 25 . The shell 29 is provided on the periphery of the electromagnetic coil 25 to constitute the appearance of the aerosol generating device 10 .

[0055] In one embodiment, there is also a third gas medium layer between the shell 29 and the electromagnetic coil 25. The third gas medium layer can be sealed or unsealed. In one embodiment, the shell 29 may include a heat-conducting material, for example, the shell 29 may be made of metal or alloy, including but not limited to: stainless steel, copper, aluminum, etc. The shell 29 made of metal or alloy can make the shell 29 have a smaller thickness, which is beneficial for reducing the overall size of the aerosol generating device and can also avoid local high temperature. The shell 29 may include a heat-insulating material, which is beneficial to hinder the heat dissipation of the third gas medium layer, so that the shell 29 maintains a suitable temperature. The shell 29 may include a heat storage material, which is beneficial to hinder the heat dissipation of the third gas medium layer, so that the shell 29 maintains a suitable temperature.

[0056] In one embodiment, reference may be made to Figure 2 The first tubular body 23, the second tubular body 24 and the outer shell 29 are independently and separately formed.

[0057] The heating module 2 includes an upper connecting seat 26 which is nested with the first tubular body 23 and the second tubular body 24; wherein the upper connecting seat 26 has an insertion port for inserting the aerosol generating product 1 into the sensing body 21. In some embodiments, the inner wall of the upper connecting seat 26 may have a protrusion, which is used to clamp the aerosol generating product 1 located in the insertion port. In some embodiments, the upper connecting seat 26 simultaneously seals the top of the first gas medium layer 31 and the second gas medium layer 32. In some embodiments, the connection between the first tubular body 23 and the upper connecting seat 26, and the connection between the second tubular body 24 and the upper connecting seat 26 have sealing silicone 27, and the sealing silicone 27 makes the connection between the first tubular body 23 and the second tubular body 24 and the upper connecting seat 26 an airtight connection, thereby ensuring that the first gas medium layer 31 and the second gas medium layer 32 are airtight.

[0058] The airtightness of the bulk dielectric layer 32.

[0059] In one embodiment, the tops of the first tubular body 23 and the second tubular body 24 are fixed and sealed separately through different upper connecting seats 26 .

[0060] The heating module 2 includes a lower connection seat 28 which is nested and connected with the first tubular body 23 and the second tubular body 24. Figure 2 , the lower connecting seat 28 seals the bottom of the first gas medium layer 31 and the second gas medium layer 32 at the same time. In some embodiments, the connection between the first tubular body 23 and the lower connecting seat 28, and the connection between the second tubular body 24 and the lower connecting seat 28 have a sealing silicone 27, and the sealing silicone 27 makes the connection between the first tubular body 23 and the second tubular body 24 and the upper connecting seat 28 an airtight connection, thereby ensuring the airtightness of the first gas medium layer 31 and the second gas medium layer 32.

[0061] In one embodiment, the bottoms of the first tubular body 23 and the second tubular body 24 are fixed and sealed separately through different lower connecting seats 28 .

[0062] In some embodiments, the connection between the first tubular body 23 and the upper connecting seat 26 / lower connecting seat 28, and the connection between the second tubular body 24 and the upper connecting seat 26 / lower connecting seat 28 are provided with heat insulating materials to further prevent heat from escaping from the bottom or the top.

[0063] In some embodiments, the gas medium in the first gas medium layer 31 , the second gas medium layer 32 or the third gas medium layer 33 may be carbon dioxide, nitrogen, argon, helium or a mixture of at least two of these gases, or air.

[0064] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims

1. A heating module, characterized in that: include: A receptor, wherein the receptor has a receiving cavity for receiving the aerosol generating product; A first tubular body, wherein the first tubular body surrounds the outer periphery of the susceptor, and a sealed first gas medium layer is provided between the first tubular body and the susceptor; A second tubular body, wherein the second tubular body surrounds the periphery of the first tubular body, and a sealed second gas medium layer is provided between the second tubular body and the first tubular body; and An electromagnetic coil is surrounded by the outer periphery of the second tubular body.

2. The heating module according to claim 1, characterized in that: The maximum thickness of the first gas medium layer is between 1.0 and 1.5 mm.

3. The heating module according to claim 1, characterized in that: The maximum thickness of the second gas medium layer is between 0.3 mm and 1.0 mm.

4. The heating module according to claim 1, characterized in that: The periphery of the second tubular body is provided with a groove, and the electromagnetic coil is arranged in the groove; or the periphery of the second tubular body is provided with convex ribs, and the electromagnetic coil is arranged between the convex ribs; or the periphery of the second tubular body is provided with longitudinal convex ribs, and the longitudinal convex ribs have a plurality of notches, and the electromagnetic coil is arranged at intervals from the notches.

5. The heating module according to claim 1, characterized in that: The heating module also includes a shell, which is arranged on the periphery of the electromagnetic coil, and a third gas medium layer is provided between the shell and the second gas medium layer.

6. The heating module according to any one of claims 1 to 5, characterized in that: In at least one of the first gas medium layer or the second gas medium layer, a region where the maximum thickness is located coincides with a temperature concentration region of the susceptor in a radial projection direction.

7. The heating module according to claim 1, characterized in that: The temperature difference of the first gas medium layer is greater than the temperature difference of the second gas medium layer.

8. The heating module according to claim 1, characterized in that: In at least a partial region between the first tubular body and the susceptor, the first gas medium layer has a uniform thickness; or, in at least a partial region between the first tubular body and the susceptor, the first tubular body extends in the longitudinal direction of the susceptor and has a flat inner surface.

9. The heating module according to claim 1, characterized in that: A first partition is disposed between the first tubular body and the sensor, and the first partition divides the first gas medium layer into at least two independent chambers.

10. The heating module according to claim 1, characterized in that: The first tubular body and the second tubular body are integrally formed.

11. The heating module according to claim 1, characterized in that: The gas medium of at least one of the first gas medium layer and the second gas medium layer includes carbon dioxide, nitrogen, helium, argon or air.

12. The heating module according to claim 1, characterized in that: A second partition is further arranged between the second tubular body and the first tubular body, and the second partition divides the second gas medium layer into at least two independent chambers.

13. The heating module according to claim 1, characterized in that: The heating module also includes an upper connecting seat, a lower connecting seat and sealing silicone. The upper connecting seat and the lower connecting seat are nested and connected with the first tubular body and the second tubular body. The sealing silicone is arranged at the connection between the first tubular body, the second tubular body and the upper connecting seat and the lower connecting seat.

14. An aerosol generating device, characterized in that: A heating module comprising any one of claims 1 to 13, further comprising a power supply and a circuit board; The power supply is used to provide electrical energy to the heating module, and the circuit board is configured to control the operation of the heating module so as to heat the aerosol generating product to generate aerosol.

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