Aerosol generating device

Abstract

The present invention provides a heating assembly (30) and an aerosol generating device. The heating assembly (30) includes a base body (31) for inserting an aerosol-generating product (A), an infrared layer (32) located around the exterior of the base body (31) for heating and atomizing the aerosol-generating product (A) by emitting infrared rays when heated, and a heating element (33) located around the exterior of the base body (31) for heating the infrared layer (32) when energized. The heating assembly (30) effectively improves heating efficiency and has relatively high heating uniformity, thereby avoiding the problem of the aerosol-generating product (A) being partially heated to a high temperature and burned.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority from Chinese Patent Application No. 2021114232748, filed on November 26, 2021, the entire contents of which are hereby incorporated by reference.

[0002] The present invention relates to the field of electronic atomization devices, and more particularly to heating assemblies and aerosol generating devices. [Background technology]

[0003] Heat Not Burning (HNB) aerosol generating devices are gaining more and more attention and support due to their advantages of being safe, easy to use, healthy and environmentally friendly.

[0004] Existing heating non-combustion aerosol generating devices generally include a heating assembly and a power supply assembly, where the heating assembly heats and atomizes the aerosol-generating product when energized, and the power supply assembly is connected to the heating assembly to supply power to the heating assembly. Currently, the heating assembly generally uses heat conduction to heat and atomize the aerosol-generating product to form an aerosol.

[0005] However, when an aerosol generating product is heated by heat conduction, it is likely to become partially hot, causing the aerosol generating product to be burned. In addition, because the heat conduction efficiency of the aerosol generating product is relatively low, the temperature difference between the inside and outside of the aerosol generating product is relatively large, and the heating uniformity is relatively low. This not only affects the smoking experience, but also leads to a relatively low utilization rate of the aerosol generating product and a relatively long pre-heating time. Summary of the Invention [Problem to be solved by the invention]

[0006] The heating assembly and aerosol generating device of the present application are intended to solve the problem that when existing heating assemblies heat an aerosol generating product by thermal conduction, the aerosol generating product is prone to being burned and the aerosol generating product is relatively poorly heated uniformly. [Means for solving the problem]

[0007] To solve the above technical problems, one technical solution used by the present application is to provide a heating assembly, which includes a base body for inserting an aerosol-generating product, an infrared layer positioned around the exterior of the base body for heating and atomizing the aerosol-generating product by emitting infrared rays when heated, and a heating element positioned around the exterior of the base body for heating the infrared layer when energized.

[0008] The heating element is a heating layer, the heating layer is installed on the outer surface of the base body and is insulated from the base body, and the infrared layer is installed on the surface of the heating layer away from the base body.

[0009] The infrared layer has a thickness of 10 to 100 micrometers, and a micro-nano structure is formed on the surface of the infrared layer that faces away from the base body.

[0010] The material of the infrared layer includes one or more of black silicon, cordierite, transition metal oxide spinel, rare earth oxide, ion co-doped perovskite, silicon carbide, zircon, and boron nitride.

[0011] The infrared layer has a thickness of 1 to 10 micrometers, and is made of CrC, TiCN, or diamond-like carbon.

[0012] The infrared layer is disposed on the outer surface of the base body, and the heating element is a heating layer, which is disposed on the surface of the infrared layer away from the base body.

[0013] The heating layer further includes a protective layer that is disposed on a surface of the heating layer away from the infrared layer, is infrared-transmittable, and protects the heating layer.

[0014] The protective layer has a thickness of 5 to 60 micrometers, and a micro-nano structure is formed on the surface of the protective layer facing away from the base body.

[0015] The infrared layer covers the entire outer surface of the base body, and the area ratio of the heating layer to the infrared layer is less than 40%.

[0016] The device further includes a transition layer disposed between the infrared layer and the heating layer.

[0017] The heating layer has a thickness of 5 to 20 micrometers.

[0018] The base body is in the form of a sheet, needle, or bar, and the diameter of the needle- or bar-shaped base body is 1.8 to 2.5 mm.

[0019] The base body is made of an insulating material.

[0020] The insulating material is ceramic.

[0021] The base body includes a conductive body and an insulating layer disposed on the outer surface of the conductive body.

[0022] The conductive body is in the form of a sheet, needle or bar, and is made of a metal.

[0023] To solve the above technical problems, the present application provides another technical solution to provide an aerosol generating device, which includes the heating assembly described above, for heating and atomizing an aerosol-generating product when energized, and a power supply assembly connected to the heating assembly for supplying power to the heating assembly. [Effects of the Invention]

[0024] In the heating assembly and aerosol generating device according to the embodiments of the present application, the heating assembly provides a base body through which the aerosol-generating product is inserted, and an infrared layer is provided around the base body on the outside of the base body, which emits infrared rays when heated, thereby heating and atomizing the aerosol-generating product. Because of its relatively high infrared radiation capacity, it not only improves the preheating efficiency of the aerosol-generating product but also effectively reduces the temperature difference between the inside and outside of the aerosol-generating product, thereby improving the heating uniformity of the aerosol-generating product and preventing the aerosol-generating product from being burned due to partial high temperatures. Furthermore, a heating element is provided around the base body on the outside of the base body, which heats the infrared layer when the heating element is energized, causing the infrared layer to emit infrared rays. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a structural schematic diagram of an aerosol generating device according to an embodiment of the present application. [Figure 2] FIG. 2 is a structural schematic diagram of a needle-shaped heating assembly. [Figure 3a] FIG. 3 is a cross-sectional view of a first embodiment of the heating assembly shown in FIG. 2. [Figure 3b] FIG. 3 is a longitudinal cross-sectional view of the first embodiment of the heating assembly shown in FIG. 2. [Figure 4a] FIG. 3 is a cross-sectional view of a second embodiment of the heating assembly shown in FIG. 2. [Figure 4b] 3 is a longitudinal cross-sectional view of a second embodiment of the heating assembly shown in FIG. 2. [Figure 5] FIG. 2 is a structural schematic diagram of a sheet-shaped heating assembly. [Figure 6] FIG. 6 is a longitudinal cross-sectional view of the first embodiment of the heating assembly shown in FIG. 5. [Figure 7] FIG. 6 is a longitudinal cross-sectional view of a second embodiment of the heating assembly shown in FIG. 5. [Figure 8]FIG. 6 is a longitudinal cross-sectional view of a third embodiment of the heating assembly shown in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. Of course, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, any other embodiments that a person skilled in the art can obtain without inventive efforts fall within the scope of protection of the present application.

[0027] The terms "first," "second," and "third" used herein are for descriptive purposes only and should not be understood as indicating or implying the relative importance or the number of technical features being indicated. Thus, a feature qualified by "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of this application, unless otherwise clearly and specifically limited, "plurality" means at least two, e.g., two, three, etc. All directional indications (e.g., up, down, left, right, front, rear, etc.) in the embodiments of this application are intended merely to interpret the relative positional relationships, movement situations, etc. between components in a specific position (as illustrated), and if the specific position changes, the directional indications also change correspondingly. Furthermore, the terms "comprise," "have," and any variations thereof are intended to include a non-exclusive inclusion. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the enumerated steps or units, and may preferably include unenumerated steps or units, or may further include other steps or units inherent to the process, method, product, or apparatus.

[0028] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of the present application. Appearances of the term in various places in the specification do not necessarily refer to the same embodiment, nor are they exclusive independent or alternative embodiments of other embodiments. As will be understood by those skilled in the art, either explicitly or implicitly, the embodiments described herein may be combined with other embodiments.

[0029] The present invention will be described in detail below by way of examples with reference to the drawings.

[0030] Referring to Figure 1, Figure 1 is a structural schematic diagram of an aerosol generating device according to one embodiment of the present application. In this embodiment, an aerosol generating device is provided, and the structure of the aerosol generating device includes a chamber, a power supply assembly 10, a circuit 20 and a heating assembly 30.

[0031] Aerosol-generating product A is removably housed within the chamber. Aerosol-generating product A preferably uses a tobacco-containing material that releases volatile compounds from the substrate when heated, or may be a non-tobacco material that is suitable for electrical heating to produce smoke after heating. Aerosol-generating product A preferably uses a solid substrate, which may contain one or more of powders, particles, shreds, strips, or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco, or may contain additional tobacco or non-tobacco volatile flavor compounds that are released when affected by heat.

[0032] The heating assembly 30 extends at least partially into the chamber and is inserted into the aerosol-generating product A when the aerosol-generating product A is contained in the chamber to heat it, thereby causing the aerosol-generating product A to release multiple volatile compounds, which are formed only by the heating process. The power supply assembly 10 is for supplying power, and the circuit 20 is for conducting current between the power supply assembly 10 and the heating assembly 30. The heating assembly 30 may be the heating assembly 30a / 30b according to the following embodiments.

[0033] Existing heating assemblies generally heat the aerosol-generating product by heat conduction. However, this method often results in a problem where the part of the aerosol-generating product A that contacts the heating assembly becomes partially hot, causing the aerosol-generating product A in that part to be burned. At the same time, the heat conduction efficiency of the aerosol-generating product A is relatively low, which not only results in a relatively long pre-heating time, but also in a relatively large temperature difference between the part of the aerosol-generating product A that contacts the heating assembly and the part away from the heating assembly, and in a relatively low heating uniformity of the aerosol-generating product A, which not only affects the inhalation feeling but also results in a relatively low utilization rate of the aerosol-generating product A.

[0034] To solve the above technical problems, the embodiment of the present application provides a heating assembly 30a / 30b, which, when energized, emits infrared rays to heat the aerosol-generating product A. The relatively high infrared radiation capacity not only improves the preheating efficiency of the aerosol-generating product A, but also effectively reduces the temperature difference between the inside and outside of the aerosol-generating product A, thereby improving the heating uniformity of the aerosol-generating product A and avoiding the problem of the aerosol-generating product A being burned due to partial high temperatures.

[0035] Referring to FIG. 2, FIG. 2 is a structural schematic diagram of a needle-shaped heating assembly 30a, FIG. 3a is a cross-sectional view of a first embodiment of the heating assembly 30a shown in FIG. 2, and FIG. 3b is a longitudinal-sectional view of the first embodiment of the heating assembly 30a shown in FIG. 2. In the first embodiment, a heating assembly 30a is provided, which has a bar or needle shape and can be applied to various fields, such as electronic cigarettes, medical care, and beauty. The heating assembly 30a includes a base body 31, an infrared layer 32, and a heating element 33. The longitudinal direction in this application refers to the length direction of the heating assembly 30a / 30b, and the transverse direction refers to the direction perpendicular to the length direction of the heating assembly 30a / 30b.

[0036] The base body 31 is used to insert the aerosol-generating product A. The aerosol-generating product A may be a substrate such as a grass leaf or a paste-like substrate. As shown in FIG. 2, the base body 31 is specifically bar- or needle-shaped, thereby enhancing the strength of the base body 31. The radial dimension of the needle- or bar-shaped base body 31 may be 1.8 to 2.5 millimeters. The base body 31 may be made of a high-temperature insulating material such as ceramic, quartz glass, or mica, thereby preventing short-circuiting between the two electrodes, as exemplified in the first embodiment. Preferably, the base body 31 may be made of transparent quartz. Specifically, the base body 31 may include a main body portion and an insertion portion connected in an axial direction. The insertion portion becomes gradually smaller in size in a direction away from the main body portion. During the insertion of the base body 31 into the aerosol-generating product A, the insertion portion of the base body 31 is inserted first into the aerosol-generating product A, thereby reducing insertion resistance.

[0037] The heating element 33 is a heating layer, and the thickness of the heating layer may be 5 to 20 micrometers. In one embodiment, as shown in FIGS. 3a and 3b, the heating element 33 is disposed on the outer surface of the base body 31 and heats the infrared layer 32 when energized. Specifically, the heating element 33 may be formed on the entire outer surface of the base body 31 by methods such as vapor deposition, wire printing, sputtering, coating, or printing. The outer surface of the base body 31 refers to the side surface of the base body 31 and does not include the upper and lower end surfaces. This case is exemplified in all embodiments of the present application. In this embodiment, two electrodes may be disposed at two predetermined positions on the heating element 33, and the two electrodes are intended to be connected to a positive lead wire and a negative lead wire, respectively, and thereby connected to a power supply assembly. Of course, in other embodiments, the outer surface of the base body 31 may refer to the side surface and the upper and lower end surfaces of the base body 31. The heating element 33 may have an arc shape with a notch along the circumferential direction of the base body 31, and both ends of the heating element 33 where the notch is located may be formed as two electrodes, thereby connecting to a positive lead wire and a negative lead wire, but this application is not limited thereto. Specifically, the heating element 33 may be specifically a heating film, for example, a heating film layer made of a noble metal or base metal slurry such as silver-palladium, ruthenium, or gold slurry.

[0038] In this embodiment, the infrared layer 32 is disposed on the surface of the heating element 33 away from the base body 31 and is disposed around the entire outer surface of the base body 31, and is intended to heat and atomize the aerosol-generating product A by emitting infrared rays when heated, thereby heating and atomizing the aerosol-generating product A with the emitted infrared rays, which further effectively improves the heating efficiency and achieves relatively high heating uniformity, thereby avoiding the problem of the aerosol-generating product A becoming partially too hot and being burnt. Note that the infrared layer 32 in the embodiment of the present application does not generate heat itself; rather, the temperature of the infrared layer 32 itself changes after the heating element 33 is energized and heats up, and the heat is transferred to the infrared layer 32, causing the temperature of the infrared layer 32 to change.

[0039] By arranging both the heating element 33 and the infrared layer 32 around the entire outer surface of the base body 31, it is ensured that after the heating element 33 is energized, the heating assembly 30a can uniformly radiate infrared rays along the circumferential direction of the base body 31. As a result, after the aerosol-generating product A is inserted, the aerosol-generating product A can be uniformly heated along the circumferential direction of the base body 31, avoiding partial heating and burning that would affect the smoking experience.

[0040] In a specific embodiment, the infrared layer 32 may be an infrared heating film, such as an infrared ceramic coating. Of course, the infrared layer 32 may also be a metal layer, a conductive ceramic layer, or a conductive carbon layer. The infrared layer 32 may be in the form of a continuous film, a porous mesh, or a strip. The material, shape, and size of the infrared layer 32 may be determined as needed. The infrared heating wavelength is 2.5 μm to 20 μm. To heat the aerosol-forming substrate, the heating temperature generally needs to be 350°C or higher, and the peak of energy radiation is mainly in the wavelength range of 3 to 5 μm.

[0041] In a specific embodiment, the infrared layer 32 has a thickness of 10 to 100 micrometers. Preferably, the infrared layer 32 has a thickness of 20 to 40 micrometers. In this embodiment, the infrared layer 32 may be manufactured by a thick-film printing method. The material of the infrared layer 32 includes one or more of black silicon, cordierite, transition metal oxide spinel, rare earth oxide, ion-codoped perovskite, silicon carbide, zircon, and boron nitride.

[0042] In another specific embodiment, the thickness of the infrared layer 32 is 20 to 500 micrometers, preferably 10 to 100 micrometers. In this specific embodiment, the infrared layer 32 may be manufactured by tape casting, in which the raw tape is then integrally sintered with the base body 31, resulting in relatively high production operability. In this embodiment, a micro-nanostructure is formed on the surface of the infrared layer 32 facing away from the base body 31, thereby reducing adhesion of the aerosol-generating product A, facilitating subsequent cleaning of the heating assembly 30a, and improving the user experience. Specifically, the micro-nanostructure may be formed by laser engraving a pattern into the raw tape after tape casting and drying. The micro-nanostructure may be in a variety of patterns, such as a circle, a diamond, or a hexagon. The side length of the pattern may be 0.1 to 1 millimeter.

[0043] In yet another embodiment, the infrared layer 32 has a thickness of 1 to 10 micrometers, preferably 1 to 5 micrometers. In this embodiment, the infrared layer 32 is specifically a thin-film coated film. The material of the infrared layer 32 is CrC, TiCN, or diamond-like carbon thin film (DLC).

[0044] 3a and 3b, the heating assembly 30a further includes a transition layer 35, which is disposed between the infrared layer 32 and the heating layer and may be disposed around the periphery of the base body 31 to reduce the expansion coefficient between the heating layer and the infrared layer 32 and improve the overall flatness of the heating assembly 30a. Specifically, the thickness of the transition layer 35 may be 5 to 10 micrometers, and the material thereof may be SiO2 or silicate glass.

[0045] The heating assembly 30a according to the present embodiment includes a base body 31 through which the aerosol-generating product A is inserted, and a heating element 33 and an infrared layer 32 are sequentially disposed on the outer surface of the base body 31. When the heating element 33 is energized, the infrared layer 32 heats and emits infrared rays, which heat and atomize the aerosol-generating product A. This effectively improves heating efficiency and provides relatively uniform heating, thereby preventing the aerosol-generating product A from being partially burned due to high temperatures. The infrared layer 32 is disposed on the surface of the heating element 33 away from the base body 31, preventing the heating element 33 from blocking the emitted infrared rays and improving heating efficiency. Furthermore, the transition layer 35 disposed between the infrared layer 32 and the protective layer 34 contributes to the adhesion between the infrared layer 32 and the heating element 33 and improves the overall flatness of the heating assembly 30a.

[0046] In the second embodiment, referring to Figures 4a and 4b, Figure 4a is a cross-sectional view of the second embodiment of the heating assembly 30a shown in Figure 2, and Figure 4b is a longitudinal cross-sectional view of the second embodiment of the heating assembly 30a shown in Figure 2, another heating assembly 30a is provided, which differs from the heating assembly 30a of the first embodiment in that the infrared layer 32 is installed on the outer surface of the base body 31, and the heating element 33 is installed on the surface of the infrared layer 32 away from the base body 31.

[0047] 4a and 4b, the present embodiment differs from the first embodiment in that the heating assembly 30a further includes a protective layer 34. The protective layer 34 is disposed on the surface of the heating element 33 facing away from the infrared layer 32 and is transparent to infrared rays. The protective layer 34 protects and seals the heating element 33, thereby preventing the heating element 33 from being scratched during the insertion of the aerosol-generating product A. In this embodiment, the micro-nanostructure is specifically formed on the surface of the protective layer 34 facing away from the base body 31. The specific method of forming the micro-nanostructure is similar to that of the micro-nanostructure in the previous embodiment. Specifically, the protective layer 34 may be a protective glass layer. The material of the protective layer 34 may be infrared-transmitting glass. The thickness of the protective layer 34 may be 5 to 60 micrometers.

[0048] The infrared layer 32 covers the entire outer surface of the base body 31, and the ratio of the area of the heating element 33 to the infrared layer 32 is smaller than a threshold value, which ensures that the heating assembly 30a has a certain heating efficiency and increases the radiant infrared heating ratio, thereby improving the uniformity of the temperature field of the aerosol-generating product A, improving the inhalation feel of the aerosol formed by atomizing the aerosol-generating product A, and contributing to improving the utilization rate of the aerosol-generating product A. The threshold value may be 30% to 50%, and preferably 40%.

[0049] It should be noted that the infrared layer 32, the heating element 33, the protective layer 34, and the transition layer 35 may be specifically disposed around the main body of the base body 31, and the insert part can be protected by disposing one protective layer on the outer surface of the insert part of the base body 31. Of course, the infrared layer 32 and / or the heating element 33, the protective layer 34, and the transition layer 35 may also be disposed around the entire outer surface of the base body 31, and the present application is not limited thereto.

[0050] The heating assembly 30a of this embodiment can further protect the heating element 33 by installing a protective layer 34, thereby preventing the problem of being rubbed by the aerosol-generating product A, and can increase the proportion of infrared radiation in the radiation by making the area ratio of the heating element 33 to the infrared layer 32 smaller than a threshold value, thereby further ensuring uniform heating of the aerosol-generating product A.

[0051] In the third embodiment, refer to Figures 5 and 6. Figure 5 is a structural schematic diagram of a sheet-shaped heating assembly 30b, and Figure 6 is a longitudinal cross-sectional view of the first embodiment of the heating assembly 30b shown in Figure 5. The difference from the heating assemblies 30a of the first and second embodiments is that the base body 31 is sheet-shaped, i.e., plate-shaped, and includes a conductive body 311 and an insulating layer 312 installed on the outer surface of the conductive body 311.

[0052] The conductive body 311 is for inserting the aerosol-generating product A. The conductive body 311 is in the form of a sheet, and may be made of stainless steel such as SUS430 or SUS444, thereby improving the strength of the entire conductive body 311 and preventing the conductive body 311 from being bent or broken during insertion into the aerosol-generating product A. The insulating layer 312 may be a glass insulating layer 312, and may have a thickness of 5 to 20 micrometers, preferably 5 to 10 micrometers.

[0053] 6, in a specific embodiment, the heating element 33 is formed on the surface of the insulating layer 312 away from the base body 31, and may be formed by evaporation or wire printing, and the infrared layer 32 is disposed on the surface of the heating element 33 away from the insulating layer 312 and is covered by the outermost layer of the heating assembly 30a. The infrared layer 32 may be a thick-film infrared layer 32 having a thickness of 10 to 40 micrometers, and the material of the thick-film infrared layer 32 may include one or more of black silicon, cordierite, transition metal oxide-based spinel, rare earth oxide, ion-codoped perovskite, silicon carbide, zircon, and boron nitride.

[0054] In another specific embodiment, refer to FIG. 7. FIG. 7 is a longitudinal cross-sectional view of a second embodiment of the heating assembly 30b shown in FIG. 5, in which the insulating layer 312 may be formed on the surface of the conductive body 311 by physical vapor deposition (PVD). The thickness of the insulating layer 312 may be 1 to 5 micrometers. The heating element 33 may be formed on the surface of the insulating layer 312 away from the conductive body 311 by evaporation. In this embodiment, the heating assembly 30b further includes a transition layer 35, which may be formed on the surface of the heating element 33 away from the insulating layer 312 by PVD evaporation. Specifically, the material of the transition layer 35 may be the same as that of the insulating layer 312. The thickness of the transition layer 35 may be 1 to 5 micrometers, preferably 1 to 2 micrometers. Furthermore, in this embodiment, the infrared layer 32 is formed on the surface of the transition layer 35 away from the heating element 33. The infrared layer 32 may also be formed by PVD evaporation. The thickness of the infrared layer 32 may be 1 to 5 micrometers, preferably 1 to 2 micrometers, and is made of CrC, TiCN, or a diamond-like carbon thin film (DLC).

[0055] In yet another embodiment, Figure 8 is a longitudinal sectional view of a third embodiment of the heating assembly 30b shown in Figure 5. An infrared layer 32 is disposed on the surface of the base body 31, and a heating element 33 is disposed on the surface of the infrared layer 32 away from the base body 31. In this embodiment, the heating assembly 30b further includes a protective layer 34 disposed on the surface of the heating element 33 away from the infrared layer 32 to protect the heating element 33. The protective layer 34 may be infrared-transmitting glass, and its specific structure and function are similar to those of the protective layer 34 in the second embodiment, and reference may be made to the above description.

[0056] In addition, the infrared layer 32, heating element 33, protective layer 34 and transition layer 35 corresponding to this embodiment may specifically be formed on one surface of the base body 31, which can save costs. Of course, the infrared layer 32 and / or heating element 33, protective layer 34 and transition layer 35 may also be formed on both of the two opposite surfaces of the base body 31, thereby achieving heating uniformity. The surface of the base body 31 specifically refers to the upper or lower surface of the plate-shaped base body 31, not the side surface corresponding to the thickness.

[0057] In the heating assembly 30b of this embodiment, the conductive body 311 is made of stainless steel, which effectively improves the overall strength of the conductive body 311 and prevents the conductive body 311 from being bent or broken during insertion into the aerosol-generating product A. At the same time, compared with a bar- or needle-shaped base body 31, the sheet-shaped conductive body 311 significantly increases the surface area of the base body 31 and improves the uniformity of the temperature field in the aerosol-generating product A, further contributing to an improved inhalation sensation of the atomized aerosol.

[0058] Specifically, the heating element 33 according to any one of the above embodiments may further have a temperature coefficient of resistance (TCR) characteristic and function as a temperature sensor. That is, the resistance of the heating element 33 has a monotonic one-to-one correspondence with its temperature. For example, the resistance of the heating element 33 increases as its temperature increases, or decreases as its temperature increases. In this manner, the heating assemblies 30a / 30b can monitor the temperature of the heating assemblies 30a / 30b by detecting the resistance of the heating element 33, and further control the temperature field of the heating assemblies 30a / 30b, thereby optimizing the smoking experience. Compared to prior art solutions that require a separate temperature sensor or other temperature sensor, the heating element 33 has a layered structure and can be directly deposited on the surface of the base body 31 or the infrared layer 32. This eliminates the need for mounting grooves or fasteners such as bolts or screws on the surface of the base body 31 or the infrared layer 32. This not only simplifies installation but also occupies a relatively small space. In addition, the heating element 33 can be selected to cover several specific positions on the base body 31 or the infrared layer 32 or to cover a wider area of the surface of the base body 31 or the infrared layer 32 according to actual needs, so that specific areas on the surface of the base body 31 and / or the infrared layer 32 can be measured for temperature, with relatively high temperature measurement accuracy, and most areas of the base body 31 and / or the infrared layer 32 can be measured for temperature, effectively expanding the temperature measurement range of the heating assembly 30a / 30b.

[0059] In a specific embodiment, the heating element 33 can cover at least the highest temperature region of the heating assembly 30a / 30b, thereby avoiding the occurrence of a problem where a portion of the temperature is too high and affects the sucking feel when the aerosol-generating product A is heated. As will be understood, in a specific embodiment, if the highest temperature region of the heating assembly 30a / 30b corresponds to a certain region of the base body 31, the heating element 33 will cover at least that position of the base body 31, and if the highest temperature region of the heating assembly 30a / 30b corresponds to a certain position of the infrared layer 32, the heating element 33 will cover at least that position of the infrared layer 32.

[0060] The above is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present application, or direct or indirect application to other related technical fields, is also included in the patent protection scope of the present application. [Explanation of symbols]

[0061] Aerosol-generating products 10 Power Supply Assembly 20 circuits 30 / 30a / 30b Heating Assembly 31 Base body 311 Conductive body 312 Insulating layer 32 Infrared Layer 33 Heating element 34 Protective layer 35 Transition layer

Claims

1. A heating assembly comprising a base body, an infrared layer, and a heating element, the base body is adapted to insert an aerosol-forming product; the infrared layer is positioned around the exterior of the base body and is used to heat and atomize the aerosol-forming product by emitting infrared rays when heated; the heating element is positioned around the exterior of the base body and is used to heat the infrared layer when energized; The heating assembly, wherein the infrared layer has a thickness of 10 to 100 micrometers.

2. 2. The heating assembly of claim 1, wherein the heating element is a heating layer, the heating layer is installed on the outer surface of the base body and is insulated from the base body, and the infrared layer is installed on the surface of the heating layer away from the base body.

3. A heating assembly as described in claim 2, wherein a micro-nanostructure is formed on the surface of the infrared layer facing away from the base body.

4. 3. The heating assembly of claim 2, wherein the material of the infrared layer comprises one or more of black silicon, cordierite, transition metal oxide spinel, rare earth oxide, ion co-doped perovskite, silicon carbide, zircon, and boron nitride.

5. 3. The heating assembly according to claim 2, wherein the infrared layer has a thickness of 1 to 10 micrometers, and the material of the infrared layer is CrC, TiCN, or diamond-like carbon.

6. The heating assembly of claim 1 , wherein the infrared layer is disposed on an outer surface of the base body, and the heating element is a heating layer, the heating layer being disposed on a surface of the infrared layer away from the base body.

7. The heating assembly according to claim 6, further comprising a protective layer disposed on a surface of the heating layer away from the infrared layer, the protective layer being transparent to infrared rays, for protecting the heating layer.

8. The heating assembly of claim 7, wherein the protective layer has a thickness of 5 to 60 micrometers, and a micro-nano structure is formed on the surface of the protective layer facing away from the base body.

9. 7. The heating assembly of claim 6, wherein the infrared layer covers the entire outer surface of the base body, and the ratio of the area of the heating layer to the area of the infrared layer is less than 40%.

10. The heating assembly of claim 2 further comprising a transition layer disposed between the infrared layer and the heating layer.

11. The heating assembly of claim 2, wherein the heating layer has a thickness of 5 to 20 micrometers.

12. 2. The heating assembly according to claim 1, wherein the base body is in the form of a sheet, needle, or bar, and the radial dimension of the needle- or bar-shaped base body is 1.8 to 2.5 mm.

13. 2. The heating assembly of claim 1, wherein the base body is made of an insulating material.

14. 14. The heating assembly of claim 13, wherein the insulating material is ceramic.

15. The heating assembly of claim 1 , wherein the base body includes a conductive body and an insulating layer disposed on an outer surface of the conductive body.

16. 16. The heating assembly according to claim 15, wherein the conductive body is in the shape of a sheet, needle, or bar, and is made of a metal.

17. An aerosol generating device, comprising:

10. The heating assembly of claim 1, wherein the heating assembly, when energized, heats and atomizes the aerosol-forming product; An aerosol generating device comprising: a power supply assembly connected to the heating assembly for supplying power to the heating assembly.

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