CN114158786A

CN114158786A - Heating element and aerosol-generating device

Info

Publication number: CN114158786A
Application number: CN202111423274.8A
Authority: CN
Inventors: 杜贤武; 李欢喜; 胡耀斌; 李日红; 周宏明
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-03-11
Also published as: WO2023093484A1

Abstract

The embodiment of the application provides a heating element and an aerosol generating device. The heating assembly comprises a base body, an infrared layer and a heating assembly; wherein the substrate is for insertion into an aerosol-generating article; an infrared layer surrounding the substrate for radiating infrared light when heated to heat and atomize the aerosol-generating article; a heating element surrounds the substrate for heating the infrared layer when energized. This heating element has effectively improved heating efficiency, and the heating homogeneity is better, has avoided aerosol to generate local high temperature of goods, leads to the problem of being burnt.

Description

Heating element and aerosol-generating device

Technical Field

The invention relates to the technical field of electronic atomization devices, in particular to a heating assembly and an aerosol generating device.

Background

Heat Not Burning (HNB) aerosol generating devices are gaining increasing attention and popularity due to their advantages of safe, convenient, healthy, environmentally friendly, etc. use.

Existing heated non-combustible aerosol generating devices generally include a heating assembly and a power supply assembly; wherein the heating assembly is used for heating and atomizing aerosol-generating products when the power supply assembly is electrified, and the power supply assembly is connected with the heating assembly and used for supplying power to the heating assembly. Currently, the heating assembly generally heats the aerosol generating article by thermal conduction to atomise to form an aerosol.

However, heating an aerosol-generating article by thermal conduction tends to produce local high temperatures, which can cause problems of charring of the aerosol-generating article, and because of the relatively low thermal conduction efficiency of the aerosol-generating article, the temperature difference between the interior and exterior of the aerosol-generating article is relatively large, and the uniformity of heating is relatively poor, thereby not only affecting the taste, but also having a relatively low utilization of the aerosol-generating article and a relatively long preheating time.

Disclosure of Invention

The application provides a heating element and aerosol generate device aims at solving current heating element and generates the aerosol through heat conduction heating aerosol and generate that the goods easily takes place aerosol and generate goods and be burnt to and the relatively poor problem of heating homogeneity of aerosol generation goods.

In order to solve the technical problem, the application adopts a technical scheme that: a heating assembly is provided. The heating assembly comprises a substrate for insertion of an aerosol-generating article; an infrared layer surrounding the substrate for radiating infrared light when heated to heat and atomize the aerosol-generating article; a heating element surrounding the substrate for heating the infrared layer when energized.

The heating element is a heating layer, and the heating layer is arranged on the outer surface of the base body and is insulated from the base body; the infrared layer is arranged on one side surface of the heating layer, which deviates from the base body.

Wherein the thickness of the infrared layer is 10-100 microns; and a micro-nano structure is formed on the surface of one side, away from the base body, of the infrared layer.

The infrared layer is made of one or more of black silicon, cordierite, transition metal oxide series spinel, rare earth oxide, ion co-doped perovskite, silicon carbide, zircon and boron nitride.

Wherein the infrared layer has a thickness of 1-10 microns; the infrared layer is made of CrC, TiCN or diamond-like carbon.

Wherein the infrared layer is arranged on the outer surface of the base body; the heating element is a heating layer, and the heating layer is arranged on the surface of the base body, which deviates from the infrared layer.

Wherein, still include: the protective layer, set up in the zone of heating deviates from a side surface on infrared layer just enables the infrared ray and passes, is used for the protection the zone of heating.

Wherein the thickness of the protective layer is 5-60 microns; and a micro-nano structure is formed on the surface of one side, which is far away from the substrate, of the protective layer.

Wherein the infrared layer covers the whole outer surface of the base body, and the area ratio of the heating layer to the infrared layer is less than 40%.

The infrared heating device further comprises a transition layer arranged between the infrared layer and the heating layer.

Wherein the thickness of the heating layer is 5-20 microns.

Wherein the substrate is in a sheet shape, a needle shape or a rod shape; wherein the radial dimension of the needle-like or rod-like matrix is 1.8-2.5 mm.

Wherein, the substrate is made of insulating materials.

Wherein, the insulating material is ceramic.

The base body comprises a conductive body and an insulating layer arranged on the outer surface of the conductive body.

The conductive body is sheet-shaped, needle-shaped or rod-shaped, and is made of metal.

In order to solve the above technical problem, another technical solution adopted by the present application is: an aerosol-generating device is provided. The aerosol-generating device comprises: a heating assembly for heating and atomising the aerosol-generating article when energised; the heating assembly is the heating assembly related to the above; and the power supply assembly is connected with the heating assembly and used for supplying power to the heating assembly.

Embodiments of the present application provide a heating assembly for insertion of an aerosol-generating article through a substrate by providing a substrate; simultaneously, an infrared layer is arranged around the base body at the periphery of the base body so as to radiate infrared rays when the infrared layer is heated, and therefore the aerosol is heated and atomized through the radiated infrared rays to generate a product; the preheating efficiency of the aerosol generating product can be improved, and the temperature difference between the inside and the outside of the aerosol generating product can be effectively reduced due to the fact that the infrared radiation capability is strong, so that the heating uniformity of the aerosol generating product is improved, and the problem that the aerosol generating product is burnt due to the fact that local high temperature occurs is avoided. In addition, the infrared layer is made to radiate infrared rays by disposing a heating element around the base at the periphery of the base to heat the infrared layer when the heating element is energized.

Drawings

Figure 1 is a schematic structural view of an aerosol-generating device provided according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a needle-like heating assembly;

FIG. 3a is a transverse cross-sectional view of the first embodiment of the heating assembly shown in FIG. 2;

FIG. 3b is a vertical cross-sectional view of the first embodiment of the heating assembly shown in FIG. 2;

FIG. 4a is a transverse cross-sectional view of a second embodiment of the heating assembly shown in FIG. 2;

FIG. 4b is a vertical cross-sectional view of the second embodiment of the heating assembly shown in FIG. 2;

FIG. 5 is a schematic view of a sheet heater assembly;

FIG. 6 is a vertical cross-sectional view of the first embodiment of the heating assembly shown in FIG. 5;

FIG. 7 is a vertical cross-sectional view of the second embodiment of the heating assembly shown in FIG. 5;

fig. 8 is a vertical cross-sectional view of the third embodiment of the heating assembly shown in fig. 5.

Reference signs

An aerosol-generating article a; a power supply assembly 10; a circuit 20; heating assemblies 30/30a/30 b; a base 31; a conductive body 311; an insulating layer 312; an infrared layer 32; a heating element 33; a protective layer 34; a transition layer 35.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The present application will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an aerosol-generating device according to an embodiment of the present disclosure; in this embodiment, there is provided an aerosol-generating device configured to comprise: chamber, power supply assembly 10, circuitry 20 and heating assembly 30.

Wherein the aerosol-generating article a is removably received within the chamber. The aerosol-generating article a preferably employs a tobacco-containing material that releases volatile compounds from the substrate upon heating; or it may be a non-tobacco material that is suitable for electrically heated smoking after heating. The aerosol-generating article a preferably employs a solid substrate, which may comprise one or more of a powder, granules, shredded strips, strips or flakes of one or more of vanilla leaves, tobacco leaves, homogenised tobacco, expanded tobacco; alternatively, the solid substrate may contain additional tobacco or non-tobacco volatile flavour compounds to be released when the substrate is heated.

At least part of the heating assembly 30 extends into the chamber and when the aerosol-generating article a is received within the chamber, the heating assembly 30 is inserted into the aerosol-generating article a to heat it, causing the aerosol-generating article a to release a plurality of volatile compounds, and these volatile compounds are formed by the heating process alone. The power supply assembly 10 is used for supplying power; the circuit 20 is used to conduct current between the power supply assembly 10 and the heating assembly 30. The heating element 30 may be a heating element 30a/30b according to the following embodiments.

Wherein existing heating assemblies typically heat aerosol generating articles by thermal conduction. This approach tends to cause localised high temperatures to occur in the portion of the aerosol-generating article a which is in contact with the heating assembly, leading to problems with that portion of the aerosol-generating article a being burnt. Meanwhile, as the heat conduction efficiency of the aerosol generating product A is low, the preheating time is long, the temperature difference between the part of the aerosol generating product A in contact with the heating assembly and the part of the aerosol generating product A departing from the heating assembly is large, the heating uniformity of the aerosol generating product A is poor, the smoking taste is affected, and the utilization rate of the aerosol generating product A is low.

To solve the above technical problem, the present embodiment provides a heating assembly 30a/30b, which heating assembly 30a/30b heats an aerosol-generating article a by infrared rays by radiating infrared rays when energized; the preheating efficiency of the aerosol generating product A can be improved, and the temperature difference between the inside and the outside of the aerosol generating product A can be effectively reduced due to the fact that the infrared radiation capability is strong, so that the heating uniformity of the aerosol generating product A is improved, and the problem that the aerosol generating product A is burnt due to the fact that local high temperature occurs is avoided.

Referring to fig. 2, fig. 2 is a schematic structural view of a needle-shaped heating element 30 a; FIG. 3a is a transverse cross-sectional view of the first embodiment of the heating assembly 30a shown in FIG. 2; FIG. 3b is a vertical cross-sectional view of the first embodiment of the heating assembly 30a shown in FIG. 2; in the first embodiment, a heating element 30a is provided, and the heating element 30a has a rod shape or a needle shape and can be used in different fields, such as electronic cigarettes, medical treatment, beauty treatment and the like. The heating assembly 30a comprises a base 31, an infrared layer 32 and a heating element 33. In which the vertical direction in the present application refers to the lengthwise direction of the heating assembly 30a/30b, and the lateral direction refers to the direction perpendicular to the lengthwise direction of the heating assembly 30a/30 b.

Wherein the substrate 31 is for insertion of the aerosol-generating article a. The aerosol-generating article a may be a plant leaf based substrate or a cream substrate or the like. As shown in fig. 2, the matrix 31 is in the form of a solid rod or a needle to enhance the strength of the matrix 31. The radial dimension of the needle-like or rod-like substrate 31 may be 1.8-2.5 mm. The material of the substrate 31 may be a high temperature insulating material such as ceramic, quartz glass, mica, etc. to prevent the two electrodes from short circuit. Preferably, the substrate 31 may be transparent quartz. Specifically, the base plate 31 may include a body portion and an insertion portion that are axially connected. Wherein the insertion portion tapers in a direction away from the main body portion, the insertion portion of the substrate 31 being inserted into the aerosol-generating article a first during insertion of the substrate 31 into the aerosol-generating article a to reduce the insertion resistance.

The heating element 33 is a heating layer, which may be 5-20 microns thick. In one embodiment, as shown in fig. 3a and 3b, a heating element 33 is provided on the outer surface of the base 31 for heating the infrared layer 32 when energized. Specifically, the heating element 33 may be formed on the entire outer surface of the substrate 31 by deposition, screen printing, sputtering, coating, printing, or the like. The outer surface of the base 31 refers to a side surface of the base 31, and does not include an upper end surface and a lower end surface, which is taken as an example in the embodiments of the present application. In this embodiment, two electrodes may be provided at two predetermined locations on the heating element 33, the two electrodes being used to connect the positive and negative leads, respectively, to communicate with the power supply assembly. Of course, in other embodiments, the outer surface of the base 31 may also refer to the side surface and the upper and lower end surfaces of the base 31. The heating element 33 may also be in an arc shape with a notch along the circumferential direction of the substrate 31, and two ends of the notch of the heating element 33 may be formed as two electrodes to be connected with the positive electrode lead and the negative electrode lead, which is not limited in this application. Specifically, the heating element 33 may be a heating film; such as noble metal electronic paste, silver palladium, ruthenium system, gold paste, etc., and base metal electronic paste heating film.

In this embodiment, the infrared layer 32 is disposed on the surface of the heating element 33 facing away from the base 31 and surrounding the entire outer surface of the base 31, and is used for radiating infrared rays when heating to heat and atomize the aerosol-generating article a, so that the aerosol-generating article a is heated and atomized by the radiated infrared rays, thereby effectively improving the heating efficiency, and the heating uniformity is good, thereby avoiding the problem that the aerosol-generating article a is locally high in temperature and burnt. The infrared layer 32 according to the embodiment of the present invention does not generate heat by itself, and the temperature of the infrared layer 32 itself changes after heat is transferred to the infrared layer 32 by the heating element 33 after heat is generated by energization.

Wherein, through all surrounding the setting in the whole surface of base member 31 with heating element 33 and infrared layer 32, can guarantee that heating element 33 circular telegram back, this heating element 30a can follow the even infrared radiation of the circumferential direction of base member 31 to after inserting aerosol and generating article A, can follow the circumferential direction of base member 31 and carry out even heating to aerosol and generating article A, avoid local heating, lead to scorching, influence and draw the taste.

In a particular embodiment, the infrared layer 32 may be embodied as an infrared heat generating 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 can be set as required. The infrared heating wavelength is 2.5 um-20 um, aiming at the characteristic of heating aerosol to form a substrate, the heating temperature is usually required to be more than 350 ℃, and the extreme value of energy radiation is mainly in a wave band of 3-5 um.

In one embodiment, the infrared layer 32 has a thickness of 10 to 100 microns. Preferably, the infrared layer 32 has a thickness of 20-40 microns. In this embodiment, the infrared layer 32 can be formed by thick film printing. The material of the infrared layer 32 includes one or more of black silicon, cordierite, transition metal oxide series spinel, rare earth oxide, ion co-doped perovskite, silicon carbide, zircon and boron nitride.

In another embodiment, the infrared layer 32 has a thickness of 20 to 500 microns; preferably, it may be 10-100 microns. In this embodiment, the infrared layer 32 can be prepared by tape casting, and the green tape is integrally fired with the base 31, so that the production operability is high. In this embodiment, a micro-nano structure is formed on the surface of one side of the infrared layer 32, which is away from the base body 31, so that the adhesion of the aerosol generating product a is reduced, the subsequent cleaning of the heating assembly 30a is facilitated, and the user experience is improved. Specifically, the micro-nano structure can be formed by using laser to etch patterns after casting, forming and drying, and the micro-nano structure can be various patterns such as a circle, a diamond, a hexagon and the like. Wherein the size of the side length of the pattern can be 0.1-1 mm.

In yet another embodiment, the infrared layer 32 has a thickness of 1 to 10 microns; preferably, the infrared layer 32 has a thickness of 1-5 microns. In this embodiment, the infrared layer 32 is specifically a thin film plating film. The infrared layer 32 is made of CrC, TiCN, or diamond-like carbon film (DLC).

Further, as shown in fig. 3a and 3b, the heating assembly 30a further includes a transition layer 35, and the transition layer 35 is disposed between the infrared layer 32 and the heating layer and can be disposed around the circumferential direction of the base 31 for buffering the expansion coefficient between the heating layer and the infrared layer 32 and improving the overall flatness of the heating assembly 30 a. Specifically, the thickness of the transition layer 35 may be 5-10 μm, and the material thereof may be SiO₂Or silicate glass.

The heating assembly 30a provided by embodiments of the present application is manufactured by providing a substrate 31 for insertion of an aerosol-generating article a through the substrate 31; meanwhile, the heating element 33 and the infrared layer 32 are sequentially arranged on the outer surface of the base body 31, so that the infrared layer 32 is heated when the heating element 33 is powered on, the infrared layer 32 radiates infrared rays, the aerosol is heated and atomized to generate a product A through the radiated infrared rays, the heating efficiency is effectively improved, the heating uniformity is good, and the problem that the aerosol generates the product A to be locally high in temperature and burnt is caused is solved. The infrared layer 32 is arranged on the surface of the heating element 33, which is far away from the base body 31, so that the heating element 33 can be prevented from blocking the radiated infrared rays, and the heating efficiency is improved; in addition, by providing the transition layer 35 between the infrared layer 32 and the protective layer 34, adhesion between the infrared layer 32 and the heating element 33 is facilitated, and the overall flatness of the heating assembly 30a is improved.

In a second embodiment, see fig. 4a and 4b, wherein fig. 4a is a transverse cross-sectional view of the second embodiment of the heating assembly 30a shown in fig. 2; FIG. 4b is a vertical cross-sectional view of the second embodiment of the heating assembly 30a shown in FIG. 2; another heating assembly 30a is provided, which differs from the heating assembly 30a provided in the first embodiment described above in that an infrared layer 32 is provided on the outer surface of the base 31, and a heating element 33 is provided on the surface of the infrared layer 32 on the side facing away from the base 31.

Further, as shown in fig. 4a and 4b, unlike the first embodiment described above, the heating assembly 30a further comprises a protective layer 34, the protective layer 34 being disposed on a side surface of the heating element 33 facing away from the infrared layer 32 and being capable of passing infrared rays therethrough for protecting and enclosing the heating element 33 to avoid the problem of the heating element 33 being scratched during insertion of the aerosol-generating article a. In this embodiment, the micro-nano structure is specifically formed on a surface of the protection layer 34 facing away from the substrate 31. The specific forming manner of the micro-nano structure is similar to that in the embodiment. Specifically, the protective layer 34 may be a protective glass layer. The material of the protection layer 34 may be infrared-transmitting glass. The thickness of the protective layer 34 may be 5-60 microns.

Wherein, infrared layer 32 covers the whole surface of base member 31, and the area ratio of heating element 33 and infrared layer 32 is less than the threshold value to when guaranteeing that heating element 30a has certain heating efficiency, improve radiation infrared heating and account for the ratio, be favorable to improving the homogeneity of aerosol generation article A temperature field like this, and promote the smoking taste of the aerosol that aerosol generation article A atomizing formed, and improve aerosol generation article A's utilization ratio. Wherein, the threshold value can be 30% -50%; preferably, the threshold value may be 40%.

Specifically, the infrared layer 32, the heating element 33, the protective layer 34, and the transition layer 35 may be disposed around the main portion of the base 31, and a protective layer may be disposed on the outer surface of the insertion portion of the base 31 to protect the insertion portion. Of course, the infrared layer 32 and/or the heating element 33, the protective layer 34 and the transition layer 35 may also be arranged around the entire outer surface of the base body 31, without this being limiting for the present application.

The heating assembly 30a provided by the present embodiment, by further providing the protective layer 34, can protect the heating element 33, preventing the occurrence of scratches caused by the aerosol-generating article a; at the same time, by making the area ratio of the heating element 33 and the infrared layer 32 smaller than the threshold value, the proportion of infrared rays in the radiation can be increased, thereby ensuring the heating uniformity of the aerosol-generating article a.

In a third embodiment, referring to fig. 5 and 6, fig. 5 is a schematic structural view of a sheet heating assembly 30 b; FIG. 6 is a vertical cross-sectional view of the first embodiment of the heating assembly 30b shown in FIG. 5; the difference from the heating assembly 30a provided in the first and second embodiments described above is that: the base 31 has a sheet shape, i.e., a plate shape, and the base 31 includes a conductive body 311 and an insulating layer 312 disposed on an outer surface of the conductive body 311.

Wherein the conductive body 311 is for insertion into the aerosol-generating article a. The conductive body 311 is sheet-shaped, and the material of the conductive body 311 may be stainless steel of SUS430, SUS444, or the like, so as to improve the overall strength of the conductive body 311 and avoid the problem that the conductive body 311 is bent or broken in the process of inserting the aerosol-generating article a. The insulating layer 312 may be a glass insulating layer 312, and the thickness of the insulating layer 312 may be 5-20 microns; preferably, the thickness of the insulating layer 312 may be 5-10 microns.

In this embodiment, as shown in fig. 6, in a specific embodiment, the heating element 33 is formed on a surface of the insulating layer 312 facing away from the substrate 31, and the heating element 33 may be formed by deposition or screen printing; the infrared layer 32 is disposed on a surface of the heating element 33 facing away from the insulating layer 312, and covers an outermost layer of the heating element 30 a. Wherein the infrared layer 32 can be a thick film infrared layer 32 that can be 10-40 microns thick; the material of the thick film infrared layer 32 includes one or more of black silicon, cordierite, transition metal oxide series spinel, rare earth oxide, ion co-doped perovskite, silicon carbide, zircon and boron nitride.

In another specific embodiment, referring to fig. 7, fig. 7 is a vertical cross-sectional view of a second embodiment of the heating assembly 30b shown in fig. 5; the insulating layer 312 can be formed on the surface of the conductive body 311 by Physical Vapor Deposition (PVD). The insulating layer 312 may be 1-5 microns thick. The heating element 33 may be formed on the surface of the insulating layer 312 facing away from the conductive body 311 by means of immersion plating. In this embodiment, the heating assembly 30b further includes a transition layer 35, and the transition layer 35 may be formed on a surface of the heating element 33 facing away from the insulating layer 312 by PVD deposition; specifically, the material of the transition layer 35 may be the same as the material of the insulating layer 312. The thickness of the transition layer 35 may be 1-5 microns, and preferably, may be 1-2 microns. Further, in this embodiment, the infrared layer 32 is formed on a surface of the transition layer 35 on a side facing away from the heating element 33. The infrared layer 32 may also be formed by PVD deposition. The infrared layer 32 can have a thickness of 1-5 microns; preferably, it may be 1-2 microns. The infrared layer 32 is made of CrC, TiCN, or diamond-like carbon film (DLC).

In yet another embodiment, FIG. 8 is a vertical cross-sectional view of a third embodiment of the heating assembly 30b shown in FIG. 5. The infrared layer 32 is disposed on the surface of the base 31, and the heating element 33 is disposed on the surface of the infrared layer 32 facing away from the base 31. In this embodiment, the heating assembly 30b further comprises a protective layer 34, the protective layer 34 being arranged on a surface of the heating element 33 facing away from the infrared layer 32 to protect the heating element 33. The protective layer 34 may be specifically an infrared-transmitting glass, and the specific structure and function thereof are similar to those of the protective layer 34 in the second embodiment described above, as specifically described above.

It should be noted that the infrared layer 32, the heating element 33, the protective layer 34, and the transition layer 35 corresponding to this embodiment may be formed on one side surface of the base 31, which may save cost, and of course, the infrared layer 32 and/or the heating element 33, the protective layer 34, and the transition layer 35 may also be formed on both surfaces of the base 31 opposite to each other, so as to provide heating uniformity. The surface of the substrate 31 specifically refers to the upper surface or the lower surface of the plate-shaped substrate 31, and is not a side surface corresponding to the thickness.

The heating element 30b provided by the embodiment can effectively improve the overall strength of the conductive body 311 by making the conductive body 311 made of stainless steel, and avoid the problem that the conductive body 311 is bent or broken in the process of inserting the aerosol-generating product a. Meanwhile, the conductive body 311 is sheet-shaped, so that the surface area of the substrate 31 is greatly increased compared with a rod-shaped or needle-shaped substrate 31, the uniformity of the temperature field of the aerosol generating product A is improved, and the smoking taste of the aerosol formed by atomization is improved.

Specifically, the heating element 33 according to any of the above embodiments may also have a Temperature Coefficient of Resistance (TCR) characteristic and may be used as a temperature sensor. I.e. the resistance value of the heating element 33 has a monotonic one-to-one relationship with its own temperature value. For example, the resistance value of the heating element 33 increases as its temperature value increases; alternatively, the resistance value of the heating element 33 decreases as its temperature value increases. Therefore, the heating assembly 30a/30b can monitor the temperature value of the heating assembly 30a/30b by detecting the resistance value of the heating element 33, and further regulate and control the temperature field of the heating assembly 30a/30b to achieve the best effect of sucking the mouth feel. Compared with the scheme that temperature measuring elements such as a temperature measuring sensor and the like need to be additionally arranged in the prior art, the heating element 33 is layered and can be directly deposited on the surface of the base body 31 or the infrared layer 32, and a mounting groove does not need to be arranged on the surface of the base body 31 or the infrared layer 32 or a fixing piece such as a screw or a screw is used for mounting and fixing the heating element, so that the heating element 33 is convenient to arrange and occupies a small space. In addition, because the heating element 33 can select certain specific positions covering the base body 31 or the infrared layer 32 and select the surface of the base body 31 or the infrared layer 32 covering a larger range of area according to actual requirements, the temperature measurement can be carried out on specific areas of the surface of the base body 31 and/or the infrared layer 32, the temperature measurement accuracy is higher, the temperature measurement can be carried out on most areas of the base body 31 and/or the infrared layer 32, and the temperature measurement range of the heating assembly 30a/30b is effectively expanded.

In a particular embodiment, the heating element 33 may cover at least the highest temperature area of the heating component 30a/30b to avoid problems with local temperatures that are too high to affect the heated mouthfeel of the aerosol-generating article a. It will be appreciated that in a particular embodiment, if the highest temperature zone of the heating assembly 30a/30b corresponds to a certain area of the substrate 31, then the heating element 33 covers at least that position of the substrate 31; 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 covers at least that position of the infrared layer 32.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. A heating assembly, comprising:

a substrate for insertion of an aerosol-generating article;

an infrared layer surrounding the substrate for radiating infrared light when heated to heat and atomize the aerosol-generating article;

a heating element surrounding the substrate for heating the infrared layer when energized.

2. The heating assembly of claim 1, wherein the heating element is a heating layer disposed on an outer surface of the base body and insulated from the base body; the infrared layer is arranged on one side surface of the heating layer, which deviates from the base body.

3. A heating assembly according to claim 2, wherein the infrared layer has a thickness of 10-100 microns; and a micro-nano structure is formed on the surface of one side, away from the base body, of the infrared layer.

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

5. A heating assembly according to claim 2, wherein the infrared layer has a thickness of 1-10 microns; the infrared layer is made of 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; the heating element is a heating layer, and the heating layer is arranged on the surface of the base body, which deviates from the infrared layer.

7. The heating assembly of claim 6, further comprising:

the protective layer, set up in the zone of heating deviates from a side surface on infrared layer just enables the infrared ray and passes, is used for the protection the zone of heating.

8. The heating assembly of claim 7, wherein the protective layer has a thickness of 5-60 microns; and a micro-nano structure is formed on the surface of one side, which is far away from the substrate, of the protective layer.

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

10. The heating assembly of any of claims 2-9, further comprising a transition layer disposed between the infrared layer and the heating layer.

11. The heating assembly of any of claims 2-9, wherein the thickness of the heating layer is 5-20 microns.

12. The heating element of claim 1, wherein the substrate is in the form of a sheet, a needle, or a rod; wherein the radial dimension of the needle-like or rod-like matrix is 1.8-2.5 mm.

13. The heating element of claim 1, wherein the substrate is an insulating material.

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

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

16. The heating element of claim 15, wherein the conductive body is in the form of a plate, a needle, or a rod, and the conductive body is made of metal.

17. An aerosol-generating device, comprising:

a heating assembly for heating and atomising the aerosol-generating article when energised; the heating assembly is as claimed in any one of claims 1-16;

and the power supply assembly is connected with the heating assembly and used for supplying power to the heating assembly.