Heating assembly and aerosol generating device

Abstract

The embodiment of the invention provides a heating assembly and an aerosol generating device, the heating assembly is used for heating an aerosol generating product to generate aerosol, and the heating assembly comprises a sensing layer which can be penetrated by a magnetic field in a changing magnetic field to generate heat; the heat conduction layer is connected with the sensing layer and used for transmitting at least part of heat generated by the sensing layer to the aerosol generating product so as to heat the aerosol generating product, and at least part of the surface of the heat conduction layer is exposed; wherein the heat conductivity coefficient of the heat conducting layer is greater than that of the sensing layer.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of aerosol generation technology for non - combustible heating, and in particular, to a heating component and an aerosol generation device. Background Art

[0002] During the use of tobacco products (such as cigarettes, cigars, etc.), tobacco is burned to produce tobacco smoke. People have tried to replace these tobacco - burning products by manufacturing products that release compounds without combustion.

[0003] An example of such a product is a heating device that releases compounds by heating rather than burning materials. For example, the material can be an aerosol - generating article containing tobacco or other non - tobacco products, and these non - tobacco products may or may not contain nicotine.

[0004] A known heating device includes an induction coil for providing a fluctuating magnetic field and a susceptor material capable of generating heat in the fluctuating magnetic field. However, current susceptor materials all have a low thermal conductivity, resulting in a low heat transfer efficiency between the susceptor material and the aerosol - generating article even when they are in direct contact, making the heating rate of the aerosol - generating article slow and affecting the user experience. Summary of the Invention

[0005] The present application provides a heating component and an aerosol generation device, which can improve the heat transfer efficiency between the heating component and the aerosol - generating article, thereby increasing the heating rate of the aerosol - generating article.

[0006] An embodiment of the present application provides a heating component for heating an aerosol - generating article to generate an aerosol. The heating component includes:

[0007] A susceptor layer capable of being penetrated by a magnetic field in a changing magnetic field to generate heat; and

[0008] A heat - conducting layer connected to the susceptor layer for transferring at least part of the heat generated by the susceptor layer to the aerosol - generating article to heat the aerosol - generating article, and at least part of the surface of the heat - conducting layer is exposed;

[0009] Wherein, the thermal conductivity of the heat - conducting layer is greater than the thermal conductivity of the susceptor layer.

[0010] As an example, the thermal conductivity of the heat - conducting layer is greater than or equal to 100 W / (m·k); or

[0011] The thermal conductivity of the heat - conducting layer is at least 3 times the thermal conductivity of the susceptor layer.

[0012] As an example, the heat conducting layer includes at least one of aluminum, aluminum alloy, aluminum oxide or graphite.

[0013] As an example, the heat conducting coefficient of the sensing layer is less than or equal to 40 W / (m·k).

[0014] As an example, the thickness of the heat conducting layer is greater than or equal to the thickness of the sensing layer to support the sensing layer.

[0015] As an example, the thickness of the sensing layer ranges from 0.05 mm to 0.15 mm.

[0016] As an example, the thickness of the heat conducting layer ranges from 0.1 mm to 0.25 mm.

[0017] As an example, the heating assembly further includes a heat insulating layer, the heat insulating layer and the heat conducting layer are disposed on opposite sides of the sensing layer, and the heat conducting coefficient of the heat insulating layer is less than or equal to 10 W / (m·k).

[0018] As an example, the heat insulating layer includes a sealed gas layer, and the sensing layer defines at least part of the boundary of the gas layer.

[0019] As an example, the heating assembly further includes a receiving cavity for at least partially receiving the aerosol generating article, the heat conducting layer defines at least part of the boundary of the receiving cavity, and the sensing layer is disposed around the heat conducting layer.

[0020] An embodiment of the present application provides an aerosol generating device, including the heating assembly as described above, and further including a power supply assembly and a magnetic field generator electrically connected to the power supply assembly: the magnetic field generator is configured to generate a changing magnetic field, and at least part of the sensing layer is disposed within the magnetic field range generated by the magnetic field generator.

[0021] As an example, the aerosol generating device further includes a receiving cavity for at least partially receiving the aerosol generating article, the heating assembly defines the receiving cavity or extends into the receiving cavity, and the heat conducting layer is closer to the receiving cavity than the sensing layer.

[0022] As an example, the aerosol generating device further includes a receiving cavity for at least partially receiving the aerosol generating article, the heat conducting layer defines at least part of the boundary of the receiving cavity, and the sensing layer is disposed around the heat conducting layer.

[0023] The above-mentioned heating component and aerosol generating device include a sensing layer capable of generating heat in a changing magnetic field and a heat conducting layer connected to the sensing layer. The heat conducting layer is used to transfer at least part of the heat generated by the sensing layer to the aerosol generating article, so as to heat the aerosol generating article, and at least part of the surface of the heat conducting layer is exposed; wherein the thermal conductivity of the heat conducting layer is greater than that of the sensing body. Therefore, the problem of low heat transfer efficiency between the sensing layer and the aerosol generating article is overcome, the heat transfer efficiency between the heating component and the aerosol generating article is effectively improved, the efficiency of the heating component for heating the aerosol generating article is enhanced, and further the heating rate of the aerosol generating article is increased, so that the user has a better use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0025] Figure 1 is a schematic diagram of an aerosol generating device provided by an embodiment;

[0026] Figure 2 is a schematic diagram of a heating component provided by an embodiment;

[0027] Figure 3 is a schematic diagram of a heating component provided by another embodiment;

[0028] Figure 4 is a schematic diagram of a heating component provided by yet another embodiment;

[0029] In the figure:

[0030] 1. Aerosol generating article; 11. Aerosol forming matrix;

[0031] 2. Power supply component; 21. Power supply; 22. Circuit board;

[0032] 3. Heating component; 31. Sensing layer; 32. Heat conducting layer; 33. Heat insulating layer;

[0033] 4. Magnetic field generator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a partial embodiment of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0035] The terms "first", "second", and "third" in this application are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship or movement conditions between components in a certain posture (as shown in the drawings). If this posture changes, the directional indication will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally also include steps or units not listed, or may optionally also include other steps or units inherent to these processes, methods, products, or devices.

[0036] Referring to "embodiments" herein means that the features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0037] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element, or there may be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0038] Reference may be made to Figure 1 In one embodiment of this application, an aerosol generating device is provided. An aerosol generating device is a device that engages or interacts with an aerosol generating article 1 to form an inhalable aerosol.

[0039] As used herein, the term "aerosol generating article" refers to an article that includes an aerosol forming substrate 11, which releases volatile compounds that can form an aerosol when heated, forming an aerosol. In one embodiment, the aerosol generating article 1 is removably coupled to the aerosol generating device. The aerosol generating article 1 can be disposable or reusable.

[0040] The aerosol-forming substrate 11 may include a solid aerosol-forming substrate. The solid aerosol-forming substrate may include a tobacco-containing material that contains volatile tobacco flavor compounds released from the aerosol-forming substrate upon heating. The solid aerosol-forming substrate may include a non-tobacco material. The solid aerosol-forming substrate may include a tobacco-containing material and a non-tobacco material.

[0041] The aerosol-forming substrate 11 may include a liquid aerosol-forming substrate. The liquid aerosol-forming substrate may contain a liquid of a tobacco-containing substance containing volatile tobacco flavor components, and may also be a liquid containing a non-tobacco substance. The liquid aerosol-forming substrate may contain water, a solvent, ethanol, a plant extract, a fragrance, a flavorant, or a vitamin mixture, etc. The fragrance may include an areca extract, menthol, peppermint, spearmint oil, various fruit flavor components, etc., but is not limited thereto. The flavorant may include components that can provide various scents or flavors to the user. The vitamin mixture may be a mixture mixed with at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but is not limited thereto.

[0042] The aerosol generating device may be an electrically operated device, including a power supply component 2 and a heating component 3.

[0043] The power supply component 2 includes a power supply 21 and a circuit board 22. The power supply 21 may include any suitable battery or cell. The circuit board 22 has one or more controllers that can control the power output of the power supply 21. For example, it can control the sensory cue generator in the aerosol generating device to generate sensory signals such as sound, light, or vibration, or control other operations of the aerosol generating device.

[0044] The heating component 3 is electrically connected to the power supply component 2 to obtain power from the power supply component 2 to heat the aerosol-forming substrate 11, causing the aerosol-forming substrate 11 to generate an aerosol. The circuit board 22 can control the magnitude of the power output from the power supply 21 to the heating component 3, thereby controlling the heating temperature of the heating component 3 for the aerosol-forming substrate 11.

[0045] In one embodiment of the present application, reference may be made to Figures 2 - 4, the heating component 3 includes a sensing layer 31. As used herein, the term "sensing layer" refers to a material that can convert electromagnetic energy into heat. When located within a changing electromagnetic field that can penetrate the magnetic field, and can cause eddy currents and / or hysteresis in the sensing layer 31, resulting in the sensing layer 31 generating heat. In such embodiments, the sensing layer 31 is designed to engage with an aerosol generating device including a magnetic field generator 4, or the sensing layer 31 is designed to engage with the heating component 3 including the magnetic field generator 4. The magnetic field generator 4 is capable of generating a changing magnetic field, and during use, at least a portion of the sensing layer 31 is within the range of the changing magnetic field produced by the magnetic field generator 4. Among them, the magnetic field generator 4 is electrically connected to the power supply component 2, and the power supply component 2 provides a current for the magnetic field generator 4 to generate a changing magnetic field. The magnetic field generator 4 may include one or more induction coils for generating a changing magnetic field, and the one or more induction coils may surround the sensing layer or be disposed outside the sensing layer 31. In one embodiment, the magnetic field generator 4 is capable of generating a changing magnetic field between 1 and 30 MHz, for example, between 2 and 10 MHz, for example, between 5 and 7 MHz. In one embodiment, the magnetic field generator 4 is capable of generating a changing magnetic field having a field strength (H field) between 1 and 5 kA / m, for example, between 2 and 3 kA / m, for example, about 2.5 kA / m.

[0046] Among them, the sensing layer 31 may include metal or carbon. In one embodiment, the sensing layer 31 may include a ferromagnetic material, such as at least one of ferrite, ferromagnetic steel, or stainless steel. In one embodiment, the sensing layer 31 includes at least one of permalloy or mu-metal. In one embodiment, the sensing layer 3 includes 400 series stainless steel, and the 400 series stainless steel includes grades 410, 420, or 430 stainless steel.

[0047] Currently, materials that can generate heat in a changing magnetic field basically have a low thermal conductivity. For example, the thermal conductivity of permalloy is about 32 W / (m·K), and the thermal conductivity of at least some stainless steels ranges from 10 W / (m·K) to 30 W / (m·K).

[0048] When using a heating element to heat an object to be heated, the heat transfer formula is satisfied: Q1 = λ·S·ΔT1. In this formula, Q1 is the heat exchanged between the heating element and the object to be heated, λ is the heat transfer coefficient between the heating element and the object to be heated, the heat transfer coefficient is related to the thermal conductivity of the heating element and the thermal conductivity of the object to be heated, S is the contact area between the heating element and the object to be heated, and ΔT1 is the temperature change of the object to be heated.

[0049] After the heating component 3 is prepared, the contact area S between the heating component 3 and the aerosol-generating article 1 is substantially constant. The aerosol-generating article 1 is the object heated by the heating component 3 in the present application. In the present application, the heat transfer coefficient λ between the heating component 3 and the aerosol-generating article 1 mainly refers to the thermal conductivity of the component in the heating component 3 for transferring heat to the aerosol-generating article 1.

[0050] When the temperature change ΔT1 of the object to be heated is the same, the larger the heat transfer coefficient λ, the more heat Q1 is transferred from the heating component 3 to the aerosol-generating article 1 per unit time (i.e., the heat exchanged between the heating element and the object to be heated), and the shorter the time required for the aerosol-forming substrate 11 to be heated to the preset temperature. In other words, the larger the heat transfer coefficient λ, the higher the heating efficiency of the heating component 3 for the aerosol-forming substrate 11, and the faster the heating rate of the aerosol-forming substrate 11.

[0051] Based on this, in an embodiment of the present application, reference may be made to Figures 2 - 4 , the heating component 3 further includes a heat conducting layer 32. The heat conducting layer 32 is connected to the sensing layer 31, so as to be able to absorb at least part of the heat generated by the sensing layer 31 and transfer at least part of the heat absorbed from the sensing layer 31 to the aerosol-generating article 1, thereby heating the aerosol-generating article 1 and causing the aerosol-forming substrate 11 to generate aerosol. Wherein, the thermal conductivity of the heat conducting layer 32 is greater than that of the sensing layer 31: on the one hand, it makes the heat transfer efficiency between the sensing layer 31 and the heat conducting layer 32 relatively large, which helps to improve the rate of the heat conducting layer 32 absorbing the heat generated by the sensing layer 31 and enables the heat conducting layer 32 to quickly heat up; on the other hand, it makes the heat transfer efficiency between the heat conducting layer 32 and the aerosol-generating article 1 relatively large, which helps to improve the rate of the heat conducting layer 32 transferring heat to the aerosol-generating article 1 and enables the aerosol-generating article 1 to quickly heat up.

[0052] By providing the heat conducting layer 32 between the sensing layer 31 and the aerosol-generating article 1, the problem of low heat transfer efficiency between the sensing layer 31 and the aerosol-generating article 2 is overcome. Compared with directly transferring heat from the sensing layer 31 to the aerosol-generating article 1, the heat transfer efficiency between the heating component 3 and the aerosol-generating article 1 can be significantly improved, and the heating efficiency of the heating component 3 for the aerosol-generating article 1 can be enhanced, thereby increasing the heating rate of the aerosol-generating article 1 and enabling the user to have a better user experience.

[0053] In one embodiment, the thermal conductivity of the heat conducting layer 32 is greater than or equal to 100 W / (m·k), or the thermal conductivity of the heat conducting layer 32 is at least 3 times that of the sensing layer 31. Thus, compared with the direct heat transfer between the sensing layer 31 and the aerosol-generating article 1, the heat transfer efficiency of using the heat conducting layer 32 for the heat transfer between the sensing layer 31 and the aerosol-generating article 1 increases exponentially and significantly.

[0054] Suitable materials for the heat-conducting layer 32 include, but are not limited to, at least one of aluminum, aluminum alloy, aluminum oxide, or graphite.

[0055] In one embodiment, the sensing layer 31 is mainly made of nickel-iron alloy, so its thermal conductivity is about 32 W / (m·K). The heat-conducting layer 32 includes an aluminum tube. After use, the heat-conducting layer 32 may include aluminum or may include aluminum and an aluminum oxide film, and the thermal conductivity of the heat-conducting layer 32 is about 206 W / (m·K). After adding the heat-conducting layer 32 in the heating assembly 3 to transfer the heat generated by the sensing layer 31 to the aerosol-generating article 1, the heat transfer energy between the heating assembly 3 and the aerosol-generating article 1 per unit time increases by at least 5 times, and the heating rate of the aerosol-generating article 1 therefore increases by at least 5 times.

[0056] In one embodiment, the sensing layer 31 includes a first side and a second side that are oppositely arranged. The first side faces the aerosol-generating article 1, the second side faces away from the aerosol-generating article 1, and the first side is connected to the heat-conducting layer 32.

[0057] The thermal conductivity of the sensing layer 31 can be less than or equal to 40 W / (m·K), so that the heat generated by the sensing layer 31 can be more transferred in the direction of the aerosol-generating article 1 through the first side, and the heat dissipated by the sensing layer 31 through the second side in the direction away from the aerosol-generating article 1 can be reduced, thereby helping to reduce the power consumption of the heating assembly 3 and the aerosol-generating device.

[0058] In one embodiment, the heat absorbed by the heat-conducting layer 32 to reach thermal equilibrium between the heat-conducting layer 32 and the sensing layer 31 is less than the heat transferred by the heat-conducting layer 32 to the aerosol-generating article 1. Therefore, the heat transferred by the sensing layer 31 through the first side is mainly transferred by the heat-conducting layer 32 to heat the aerosol-generating article 1, and a small amount is consumed by the heat-conducting layer 32 to increase the temperature of the heat-conducting layer 32, so that the temperature of the heat-conducting layer 32 approaches or reaches the temperature of the first side of the sensing layer 31, making the sensing layer 31 and the heat-conducting layer 32 in thermal equilibrium.

[0059] According to the laws of thermodynamics: Q2 = C·M·ΔT2. In this formula, Q2 is the heat absorbed by the object to be heated, C is the specific heat capacity of the object to be heated, and ΔT2 is the temperature change of the object to be heated. In the heating component 3 of the present application, the heat-conducting layer 32 is the object to be heated of the sensing layer 31, and the heat-conducting layer 32 is the object to be heated relative to the sensing layer 31. The heat Q released by the sensing layer 31 through its first side satisfies: Q ≥ Q1 + Q2, where Q1 is the heat transferred from the heating component 3 to the aerosol generating article 1, and Q2 is the heat consumed by the heat-conducting layer 32 to increase the temperature of the heat-conducting layer 32 to achieve thermal equilibrium between the sensing layer 31 and the heat-conducting layer 32. Among them, Q2 < Q1, so as to reduce the power consumption of the heating component 3 and the aerosol generating device. The smaller Q2 is, the smaller the power consumption of the heating component 3 and the aerosol generating device is, and at the same time, the higher the efficiency of the heat-conducting layer 32 in transferring the heat of the sensing layer 31 to the aerosol generating article 1 is.

[0060] The heat-conducting layer 32 can have a relatively large thermal conductivity while having a low specific heat capacity C, so as to reduce Q2.

[0061] The heat-conducting layer 32 can have a relatively large thermal conductivity while having a small mass M, so as to reduce Q2. For example, the mass M of the heat-conducting layer 32 can be reduced by making the heat-conducting layer 32 have a small thickness. The smaller the thickness of the heat-conducting layer 32 is, the smaller its mass M is, and the smaller Q2 is.

[0062] In one embodiment, the heating component 3 further includes a heat-insulating layer 33. The heat-insulating layer 33 is disposed adjacent to the second side of the sensing layer 33. The thermal conductivity of the heat-insulating layer 33 is less than or equal to 10 W / (m·k). The heat-insulating layer 33 is used to prevent the heat on the sensing layer 33 from dissipating through the second side, thereby helping to reduce the power consumption of the heating component 3 and the aerosol generating device, and helping more heat generated by the sensing layer 31 to be transferred through the first side in the direction towards the aerosol generating article 1, and reducing the heat dissipated by the sensing layer 31 through the second side in the direction away from the aerosol generating article 1, which is beneficial to improving the heating efficiency of the aerosol generating article 1.

[0063] The heat-insulating layer 33 can include a solid heat-insulating layer. The solid heat-insulating layer can be closely attached to the second side. The solid heat-insulating layer includes aerogel, felt or fiber, etc.

[0064] The heat-insulating layer 33 can include a gas layer. The gas layer can be a sealed gas layer to reduce the heat convection between the gas layer and the outside, thereby improving the heat-insulating effect of the gas layer. The gas layer can be an atmospheric pressure layer, whose air pressure is approximately the same as the outside atmospheric pressure. The gas layer can be a negative pressure layer, whose air pressure is less than the outside atmospheric pressure.

[0065] In one embodiment, reference can be made to Figure 1 and Figure 3, the second side of the sensing layer 31 defines at least part of the boundary of the gas layer. The thermal conductivity of the gas is lower than that of the solid, thereby being able to further reduce the heat transferred by the sensing layer 31 through the second side in the direction away from the aerosol generating article 1, such that more heat of the sensing layer 31 is transferred through the first side in the direction towards the aerosol generating article 1.

[0066] When the sensing layer 31 is in a changing magnetic field, it has a skin effect. The thickness of the sensing layer 31 can be made greater than its skin depth to improve the heating efficiency of the sensing layer 31. However, the part of the sensing layer 31 exceeding its skin depth will absorb the heat generated on the surface layer of the sensing layer 31 due to less induced current, thereby increasing the power consumption of the sensing layer 31. Therefore, the sensing layer 31 needs to have a suitable thickness so that while having a large heating efficiency, the sensing layer 31 can also reduce its own heat consumption, thereby reducing the power consumption. In one embodiment, the thickness d1 of the sensing layer 31 is between 0.05 mm and 0.15 mm, that is, 0.05 mm ≤ d1 ≤ 0.15 mm.

[0067] However, when the sensing layer 31 with a thickness d1 between 0.05 mm and 0.15 mm exists independently, the strength may be insufficient. To ensure that the sensing layer 31 has sufficient strength to maintain a stable shape when the heating assembly 3 cooperates with the aerosol generating article 1 or during the assembly of the aerosol generating device, the thickness d2 of the heat conducting layer 32 can be made greater than or equal to the thickness d1 of the sensing layer 31, so that the heat conducting layer 32 can support the sensing layer 31, making the sensing layer 31 with a smaller thickness d1 have greater strength and not easily deform. And there is no need to add other non-heating components in the heating assembly 3 to support the sensing layer 31, which is beneficial for correspondingly reducing the power consumption of the heating assembly 3.

[0068] According to the above analysis, if the thickness d2 of the heat conducting layer 32 is too large, then Q2 will be larger. To reduce the power consumption of the heating assembly 3, while meeting a large heat transfer efficiency between the heating assembly 3 and the aerosol generating article 1, and ensuring that the heat conducting layer 32 supports the sensing layer 31, the thickness d2 of the heat conducting layer 32 can be made between 0.1 mm and 0.25 mm, that is, 0.1 mm ≤ d2 ≤ 0.25 mm. When the thickness d1 of the sensing layer 31 is between 0.05 mm and 0.15 mm and the thickness d2 of the heat conducting layer 32 is between 0.1 mm and 0.25 mm, the sensing layer 31 and the heat conducting layer 32 cooperate with and support each other, such that both the sensing layer 31 and the heat conducting layer 32 with relatively small thicknesses have greater strength and are not easily deformed.

[0069] In one embodiment, the sensing layer 31 is disposed on the surface of the heat conducting layer 32 by means of printing, coating, electroplating, chemical deposition, physical deposition, ion implantation or ion sputtering, etc., so as to achieve contact between the sensing layer 31 and the heat conducting layer 32. The interface where the sensing layer 31 contacts the heat conducting layer 32 can be a clear interface, and there can be a clear boundary between the two. The interface where the sensing layer 31 contacts the heat conducting layer 32 can be a blurred interface, and there can be a blurred boundary between the two.

[0070] In one embodiment, reference may be made to Figure 1 and Figure 2 , the heating component 3 further includes a receiving cavity for at least partially receiving the aerosol generating article 1. The heating component 3 defines the receiving cavity, and the heat conducting layer 32 is closer to the receiving cavity than the sensing layer 31.

[0071] Furthermore, the heat conducting layer 32 defines at least a partial boundary of the receiving cavity. The sensing layer 31 is disposed around the heat conducting layer 32. The first side of the sensing layer 31 faces the receiving cavity, and the second side of the heat conducting layer 32 faces away from the receiving cavity. Thus, the heating component 3 heats the aerosol generating article 1 from the axial side of the aerosol generating article 1. Wherein, the heat insulating layer 33 is disposed around the sensing layer 31, and the second side of the sensing layer 32 faces the heat insulating layer 33.

[0072] In one embodiment where the heating component 3 includes a receiving cavity, when at least a part of the aerosol generating article 1 is received in the receiving cavity, at least a part of the heat conducting layer 32 can be in direct contact with the aerosol generating article 1, so that the heat transfer mode between the heat conducting layer 32 and the aerosol generating article 1 includes heat conduction, so as to improve the heat transfer efficiency between the heat conducting layer 32 and the aerosol generating article 1. Therefore, at least a part of the surface of the heat conducting layer 32 can be exposed. Alternatively, when at least a part of the aerosol generating article 1 is received in the receiving cavity, there is only an air layer between the heat conducting layer 32 and the aerosol generating article 1, and the thickness of the air layer is less than or equal to 0.2 mm, so that the inner diameter of the heat conducting layer 32 is slightly larger than the outer diameter of the aerosol generating article 1, which can facilitate the insertion of the aerosol generating article 1 into the receiving cavity and can take into account the relatively high heat transfer efficiency between the heat conducting layer 32 and the aerosol generating article 1.

[0073] In one embodiment where the heating component 3 includes a receiving cavity, at least a part of the heat conducting layer 32 is configured to be tubular. For example, the heat conducting layer 32 includes an aluminum tube mainly made of aluminum. The surface of the aluminum tube facing the aerosol generating article 1 can have an aluminum oxide film formed by aluminum oxidation, and the sensing layer 31 is connected to or disposed on the surface of the aluminum tube facing away from the aerosol generating article 1, and there can be no insulating material between the sensing layer 31 and the aluminum tube. At least a part of the aerosol generating article 1 can be inserted into the interior of the heat conducting layer 32 / aluminum tube and thus be surrounded by the heat conducting layer 32 / aluminum tube.

[0074] When the heating component 3 includes an accommodation cavity, both the sensing layer 31 and the heat conducting layer 32 are disposed on the outer periphery of the accommodation cavity, so as to be able to circumferentially heat the aerosol generating article 1.

[0075] In one embodiment, reference may be made to Figure 3 , at least a part of the heating component 3 is configured in a rod shape, a needle shape or a sheet shape, the aerosol generating device includes an accommodation cavity for accommodating at least a part of the aerosol generating article 1, at least a part of the heating component 3 extends into the accommodation cavity, and when at least a part of the aerosol generating article 1 is accommodated in the accommodation cavity, at least a part of the heating component 3 can be inserted into the interior of the aerosol generating article 1, so that the heating component 3 heats the aerosol generating article 1 inside the aerosol generating article 1.

[0076] When at least a part of the heating component 3 extends into the accommodation cavity, the heat conducting layer 32 is disposed on the outer periphery of the sensing layer 31. The interior of the heating component 3 may have a cavity, and the heat insulating layer 33 is disposed in the cavity. At least a part of the heat conducting layer 32 may be tubular, and at least a part of the sensing layer 31 may be tubular. When at least a part of the aerosol generating article has a cavity, and the heat insulating layer 33 is disposed in the cavity. At least a part of the heat conducting layer 32 may be tubular, and at least a part of the sensing layer 31 may be tubular. When at least a part of the aerosol generating article 1 is accommodated in the accommodation cavity, the heat conducting layer 32 can contact the aerosol generating article 1, so that the heat transfer mode between the heat conducting layer 32 and the aerosol generating article 1 is heat conduction, so as to improve the heat transfer efficiency between the heat conducting layer 32 and the aerosol generating article 1.

[0077] When at least a part of the heating component 3 extends into the accommodation cavity, at least a part of the sensing layer 31 and at least a part of the heat conducting layer 32 are both disposed within the accommodation cavity, so as to be able to centrally heat the aerosol generating article 1.

[0078] In one embodiment, reference may be made to Figure 4 , the aerosol generating device includes an accommodation cavity for accommodating at least a part of the aerosol generating article 1, the heat conducting layer 32 and the sensing layer 31 are configured in a sheet shape, and at least part of the boundary of the bottom of the accommodation cavity is defined by the heat conducting layer 32. When at least a part of the aerosol generating article 1 is accommodated in the accommodation cavity, the heat conducting layer 32 contacts the bottom of the aerosol generating article 1, so that the heating component 3 can heat the aerosol generating article 1 from the bottom of the aerosol generating article 1, and the heat transfer mode between the heat conducting layer 32 and the aerosol generating article 1 is heat conduction, so as to improve the heat transfer efficiency between the heat conducting layer 32 and the aerosol generating article 1.

[0079] Due to uneven magnetic field distribution, uneven heat dissipation or other reasons, the temperature at at least one end of the sensing layer in the axial direction in a conventional heating component will be significantly lower than the temperature in the middle area of the sensing layer, resulting in uneven temperature field distribution in the axial direction of the traditional heating component. In the present application, a heat conduction layer 32 is provided to connect the sensing layer 31. In the axial direction of the accommodating cavity, the length of the heat conduction layer 32 is greater than or equal to the length of the sensing layer 31, and the positive projection of the sensing layer 31 towards the heat conduction layer 32 can completely fall on the heat conduction layer 32. Under the action of the good heat transfer efficiency of the heat conduction layer 32, it can effectively balance the temperature on the sensing layer 31, reduce the temperature difference in the axial direction of the sensing layer 31, improve the problem of uneven temperature field distribution on the surface of the heating component 3 facing the aerosol-generating article 1, enhance the uniformity of heating the aerosol-generating article 1, realize the full utilization of the aerosol-generating article 1, and avoid local overheating and incomplete baking of the aerosol-generating article 1.

[0080] The above-mentioned heating component and aerosol-generating device include a sensing layer 31 that can generate heat in a changing magnetic field and a heat conduction layer 32 connected to the sensing layer 31. The heat conduction layer 32 is used to transfer at least part of the heat generated by the sensing layer 31 to the aerosol-generating article 1 to heat the aerosol-generating article 1; wherein the thermal conductivity of the heat conduction layer 32 is greater than the thermal conductivity of the sensing body 31. Therefore, the problem of low heat transfer efficiency between the sensing layer 31 and the aerosol-generating article 1 is overcome, the heat transfer efficiency between the heating component 3 and the aerosol-generating article 1 is effectively improved, and the efficiency of the heating component 3 in heating the aerosol-generating article 1 is enhanced. Furthermore, the heating rate of the aerosol-generating article 1 is increased, providing a better user experience.

[0081] It should be noted that the description and drawings of the present application provide preferred embodiments of the present application, but are not limited to the embodiments described in this specification. Further, for those of ordinary skill in the art, modifications or variations can be made based on the above description, and all such modifications and variations should fall within the protection scope of the appended claims of the present application.

Claims

1. A heating component for heating an aerosol-generating article to generate an aerosol, characterized in that, The heating component includes: a sensing layer that can be penetrated by a magnetic field in a changing magnetic field to generate heat; and a heat-conducting layer connected to the sensing layer for transferring at least part of the heat generated by the sensing layer to the aerosol-generating article to heat the aerosol-generating article, and at least part of the surface of the heat-conducting layer is exposed; wherein the heat conductivity of the heat-conducting layer is greater than that of the sensing layer.

2. The heating component according to claim 1, characterized in that, The heat conductivity of the heat-conducting layer is greater than or equal to 100 W / (m·k); or The heat conductivity of the heat-conducting layer is at least 3 times that of the sensing layer.

3. The heating component according to claim 1, wherein The heat-conducting layer includes at least one of aluminum, aluminum alloy, aluminum oxide or graphite.

4. The heating component according to claim 1, characterized in that, The heat conductivity of the sensing layer is less than or equal to 40 W / (m·k).

5. The heating assembly according to claim 1, wherein The thickness of the heat-conducting layer is greater than or equal to the thickness of the sensing layer to support the sensing layer.

6. The heating component according to claim 1, characterized in that The thickness of the sensing layer is between 0.05 mm and 0.15 mm.

7. The heating assembly according to claim 1, characterized in that, The thickness of the heat-conducting layer is between 0.1 mm and 0.25 mm.

8. The heating component according to claim 1, wherein The heating component further includes a heat-insulating layer, the heat-insulating layer and the heat-conducting layer are arranged on opposite sides of the sensing layer, and the heat conductivity of the heat-insulating layer is less than or equal to 10 W / (m·k).

9. The heating assembly according to claim 8, characterized in that, The heat-insulating layer includes a closed gas layer, and the sensing layer defines at least part of the boundary of the gas layer.

10. The heating assembly according to claim 1, wherein The heating component further includes a receiving cavity for receiving at least part of the aerosol-generating article locally, the heat-conducting layer defines at least part of the boundary of the receiving cavity, and the sensing layer is arranged around the heat-conducting layer.

11. An aerosol generating device, characterized in that, An aerosol-generating device including the heating component according to any one of claims 1-10, further includes a power supply component and a magnetic field generator electrically connected to the power supply component: the magnetic field generator is used to generate a changing magnetic field, and at least part of the sensing layer is arranged in the magnetic field range generated by the magnetic field generator.

12. The aerosol generating device according to claim 11, characterized in that, The aerosol-generating device further includes a receiving cavity for receiving at least part of the aerosol-generating article, the heating component defines the receiving cavity or extends into the receiving cavity, and the heat-conducting layer is closer to the receiving cavity than the sensing layer.

13. The aerosol generating device according to claim 11, wherein, The aerosol-generating device further includes a receiving cavity for receiving at least part of the aerosol-generating article, the heat-conducting layer defines at least part of the boundary of the receiving cavity, and the sensing layer is arranged around the heat-conducting layer.

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