CN217906346U - Heating assembly and aerosol generating device - Google Patents

Abstract

The application provides a heating element and aerosol generating device. The heating assembly includes a substrate, a radiant heating layer, and an electrically conductive coil. Wherein the substrate is in a hollow tubular shape; the radiation heating layer is arranged on one side of the inner wall surface of the substrate and is used for radiating rays when being heated; the conductive coil is arranged around the substrate and used for generating a changing magnetic field when being electrified so as to heat the radiation heating layer. The heating assembly effectively improves the heating rate and the mist outlet rate of the aerosol generating product, and ensures enough mist outlet quantity.

Description

Heating assembly and aerosol generating device

Technical Field

The utility model relates to an electronic atomization technical field especially relates to a heating element and aerosol generate device.

Background

Low temperature baking aerosol generating devices are receiving increasing attention and favor due to their safety, convenience, health, environmental protection, etc.

Existing aerosol generating devices are used to heat and atomize aerosol generating articles because of the relatively good uniformity of infrared heating and the ease of implementation. However, the existing aerosol generating device has a slow mist-out speed, and low heat utilization rate and heating efficiency.

SUMMERY OF THE UTILITY MODEL

The application provides a heating element and aerosol generating device aims at solving current aerosol generating device, and its speed of fog out is slower, the lower problem of heat utilization ratio and heating efficiency.

In order to solve the technical problem, the application adopts a technical scheme that: a heating assembly is provided. This heating element includes: the basal body is in a hollow tubular shape; a radiation heating layer provided on one side of an inner wall surface of the base body for radiating rays when heated; and the conductive coil is arranged around the substrate and used for generating a changing magnetic field when being electrified so as to heat the radiation heating layer.

The variable magnetic field generated by the conductive coil when the conductive coil is electrified enables the substrate to generate eddy current to heat the radiation heating layer.

Wherein, the matrix is a metal substrate.

The heating assembly further comprises an insulating layer, the insulating layer is arranged between the outer wall surface of the substrate and the conductive coil, and the conductive coil is arranged on the insulating layer in a surrounding mode.

Wherein, the conductive coil generates a changing magnetic field when being electrified, so that the radiation heating layer generates an eddy current to be heated.

Wherein, the matrix is an insulating substrate, and metal particles are doped in the radiation heating layer.

The heating assembly further comprises a reflecting layer, and the reflecting layer is arranged around the outer side of the radiation heating layer and used for reflecting rays radiated by the radiation heating layer.

The reflecting layer is arranged on one side, away from the substrate, of the conductive coil in a laminated mode, surrounds the conductive coil and is used for reflecting heating rays emitted by the radiation heating layer.

Wherein, heating element still includes the protective layer, and the protective layer is range upon range of to be set up in the one side that the radiation heating layer deviates from the base member.

Wherein, the conductive coil is uniformly wound on the outer wall surface of the substrate; or the conductive coil comprises a first line segment and a second line segment which are connected, the first line segment and the second line segment uniformly wind the outer wall surface of the matrix, wherein the winding density of the first line segment is greater than that of the second line segment; or the conductive coil comprises a first lead and a second lead which are spaced apart, the first lead and the second lead are uniformly wound on the outer wall surface of the substrate, and the first lead and the second lead are wound in a staggered manner, wherein the first lead and the second lead can be selectively conducted.

The heating assembly further comprises a detection circuit, and the detection circuit is used for detecting the electrical parameters of the conductive coil so as to represent the temperature of the radiation heating layer.

Wherein the radiation heating layer is an infrared layer.

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 an aerosol-generating article when energised, the heating assembly being as hereinbefore described; and the power supply assembly is electrically connected with the heating assembly and used for supplying power to the heating assembly.

According to the heating assembly and the aerosol generating device provided by the embodiment of the application, the base body is arranged on the heating assembly so that the aerosol generating product is contained in the base body. Meanwhile, the radiation heating layer is arranged on one side of the inner wall surface of the base body to radiate rays when the base body is heated, so that the aerosol generating product is heated and atomized by the radiated rays, the temperature difference between the inside and the outside of the aerosol generating product can be effectively reduced, and the heating uniformity of the aerosol generating product is improved. Furthermore, the radiation heating layer is arranged on one side where the inner wall surface of the base body is located, so that rays radiated by the radiation heating layer can directly heat the aerosol generating product without penetrating through the base body, attenuation of the rays due to penetration through the base body is avoided, the temperature rise rate and the mist outlet rate of the aerosol generating product are effectively improved, and sufficient mist outlet quantity is ensured; and because the existence of the matrix, the matrix can be used for blocking the radiation from the outside and reflecting the radiation to the inside of the matrix, so that the heat loss is reduced, and the heating efficiency of the heating assembly is improved. In addition, the heating radiation is excited by heating the radiation heating layer by the changing magnetic field generated when the electric conduction coil is electrified, so that the heating radiation is radiated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic structural diagram of a heating assembly according to an embodiment of the present disclosure;

FIG. 2 is a side sectional view of a first embodiment of a substrate-heating assembly;

FIG. 3 is a schematic diagram of a conductive coil of a heating element according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an electrically conductive coil for heating a coil assembly according to another embodiment of the present application;

FIG. 5 is a schematic diagram of an electrical coil of a heating assembly according to yet another embodiment of the present application;

FIG. 6 is a schematic diagram of an electrical coil of a heating element according to yet another embodiment of the present disclosure;

FIG. 7 is a side sectional view of a second embodiment of a substrate heat generating heating assembly;

FIG. 8 is a side sectional view of a third embodiment of a substrate heat generating heating assembly;

FIG. 9 is a side sectional view of a fourth embodiment of a substrate heat generating heating assembly;

FIG. 10 is a side sectional view of a fifth embodiment of a substrate heat generating heating assembly;

FIG. 11 is a side sectional view of a sixth embodiment of a substrate heat generating heating assembly;

FIG. 12 is a side wall cross-sectional view of the first embodiment of a radiant heating layer-generating heating assembly;

FIG. 13 is a side wall cross-sectional view of a second embodiment of a radiant heating layer-generating heating assembly;

FIG. 14 is a side wall cross-sectional view of a third embodiment of a radiant heating layer heat generating heating assembly;

FIG. 15 is a side wall cross-sectional view of a fourth embodiment of a radiant heating layer-generating heating assembly;

FIG. 16 is a side wall cross-sectional view of a fifth embodiment of a radiant heating layer-generating heating assembly;

FIG. 17 is a side wall cross-sectional view of a sixth embodiment of a radiant heating layer-generating heating assembly;

FIG. 18 is a side wall cross-sectional view of a seventh embodiment of a radiant heating layer-generating heating assembly;

FIG. 19 is a side wall cross-sectional view of an eighth embodiment of a radiant heating layer-generating heating assembly;

fig. 20 is a schematic structural diagram of an aerosol-generating device according to an embodiment of the present application.

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 as implying a number of indicated technical features. 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. In the embodiment of the present application, all directional indicators (such as up, down, left, right, front, rear \8230;) are used only to explain the relative positional relationship between the components, the motion situation, etc. at a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator 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 drawings and examples.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a heating element according to an embodiment of the present disclosure. In an embodiment of the present application, a heating assembly 30 is provided, the heating assembly 30 being for heating and atomizing an aerosol-generating article when energized to form an aerosol. The heating assembly 30 may be used in various fields, such as medical, cosmetic, leisure, smoking, etc. Wherein the aerosol-generating product preferably adopts a solid matrix, and can comprise one or more of plant leaves such as vanilla leaves, tea leaves, mint leaves, and the like, and one or more of powder, particles, broken piece strips, strips or flakes; alternatively, the solid matrix may contain additional volatile flavour compounds to be released when the matrix is heated. Of course, the aerosol-generating article may also be a liquid substrate or a cream substrate, such as oils, liquids, etc. to which the aroma component is added. The following examples all exemplify aerosol-generating articles employing solid substrates.

As shown in fig. 1, the heating assembly 30 specifically includes a substrate 31, a radiation heating layer 32, and an electrically conductive coil 33. The base 31 is hollow and tubular, and an accommodation cavity is defined by the inner wall of the base, and the aerosol-generating product is removably accommodated in the accommodation cavity. The radiation heating layer 32 is provided on the side of the inner wall surface of the base 31, i.e., the radiation heating layer 32 is located within the base 31 for radiating rays when heated to heat the aerosol-generating article; the conductive coil 33 is disposed around the substrate 31 for generating a changing magnetic field when energized to heat the radiation heating layer 32, so that the radiation heating layer 32 is heated to be excited to radiate radiation.

In one embodiment, as shown in FIGS. 2-6, the substrate 31 is made of a material that can induce a varying magnetic field to generate eddy currents that generate heat; it induces a magnetic field change in the high frequency varying magnetic field produced by the electrically conductive coil 33 to produce eddy currents and generate heat, thereby converting electrical energy into heat energy, which is then transferred to the radiant heating layer 32 by thermal conduction, causing the radiant heating layer 32 to heat up and be excited, thereby radiating heating rays to heat the aerosol-generating article. The base 31 may be a metal base, such as a ferrite base of pure iron, stainless steel, silicon steel, carbon steel, iron alloy, or the like.

The inner wall surface of the substrate 31 may also have a mirror effect, for example, the inner wall surface of the substrate 31 is polished, so that when the heating assembly 30 works, the inner wall surface of the substrate 31 can reflect the heating radiation emitted to the inner wall surface to the inside of the substrate 31 to heat and atomize the aerosol-generating product, thereby effectively reducing heat loss and improving the heating efficiency of the heating assembly 30. For example, the substrate 31 may be made of metal such as pure iron or stainless steel, so as to facilitate polishing the inner wall surface of the substrate 31 to provide a mirror surface effect.

Continuing to refer to fig. 2, fig. 2 is a side cross-sectional view of a first embodiment of a substrate-heating element. In the present embodiment, the radiation heating layer 32 is specifically laminated on the inner wall surface of the sidewall of the base body 31. Of course, in other embodiments, other dielectric layers, such as a reflective layer 36 or a thermal insulation layer, etc., may be disposed between the radiant heating layer 32 and the substrate 31; the present application is not limited thereto as long as the radiation heating layer 32 is located on the side of the inner wall surface of the base body.

In a specific embodiment, the radiation heating layer 32 may be an infrared layer, and the heating ray radiated by the infrared layer during heating is infrared ray, so that the infrared ray can penetrate through the inside of the aerosol generating product to heat the whole inside and outside of the aerosol generating product simultaneously due to the strong heat radiation capability of the infrared ray, thereby reducing the inside and outside temperature difference of the aerosol generating product. The radiation heating layer 32 may be a far infrared ceramic layer, a metal layer, or a conductive carbon layer, and may be selected as needed. In a particular embodiment, the radiant heating layer 32 is an infrared ceramic coating, and the radiant heating layer 32 radiates infrared light during operation to heat the aerosol-generating article. The infrared heating wavelength is 2.5 um-20 um, and aiming at the characteristic of heating aerosol to generate products, the heating temperature is about 350 ℃, and the extreme value of energy radiation is mainly in a wave band of 3-5 um.

In an embodiment, the radiation heating layer 32 may be formed on the inner wall surface of the sidewall of the substrate 31 by screen printing, coating, sputtering, printing, or tape casting. Wherein, the shape, area and thickness of the radiation heating layer 32 can be set according to actual needs; the shape, area and thickness of the radiant heating layer 32 are set, for example, according to a preset scheme of the temperature field of the heating assembly 30. For example, the shape of the radiation heating layer 32 may be a continuous film, a porous mesh, a strip, or the like, and specifically, a film surface heating may be made. It will be appreciated that in order to make the heating effect of the radiation heating layer 32 more uniform, its thickness is generally uniform throughout the substrate 31; of course, for special requirements, the thickness of the radiation heating layer 32 can be set to be different at different positions on the substrate 31, so that the infrared energy density of different regions of the heating assembly 30 is different, i.e. the heat density of different regions is different when the heating assembly 30 is powered on to form different temperature fields.

In this embodiment, as shown in fig. 2, the heating element 30 further includes an insulating layer 34, the insulating layer 34 is disposed on an outer wall surface of a sidewall of the substrate 31, and the conductive coil 33 is disposed around a surface of the insulating layer 34 facing away from the substrate 31, so as to prevent a short circuit between the conductive coil 33 and the substrate 31 when the heating element 30 is powered on. The insulating layer 34 may be made of a high temperature insulating material such as ceramic, quartz glass, mica, etc.; the pattern can be formed on the outer wall surface of the substrate 31 by silk-screen printing, coating, sputtering, printing or tape casting.

Specifically, the conductive coil 33 may be made of a conductive metal material, such as copper, aluminum, silver, etc., and in this embodiment, the conductive coil 33 is preferably a metal coil made of copper. The conductive coil 33 can be specifically an enameled wire and is wound on the outer wall surface of the substrate 31; it will be appreciated that in this embodiment, the varnish on the outside of the wires is an insulating material to prevent shorting problems between the coils. Of course, the conductive coil 33 can also be deposited on the outer wall surface of the substrate 31 by silk-screening, coating, sputtering, printing, etc.

Through a great deal of research, the inventor of the present application finds that when the conductive coil 33 is powered on, the conductive coil itself generates a certain amount of heat, and the heat is usually easily ignored to cause heat loss; to avoid heat loss in this portion, the heat generated by the electrically conductive coil 33 can be minimized, and the heat generated by the electrically conductive coil 33 can be conducted to the substrate 31 or the radiation heating layer 32. Specifically, the conductive coil 33 is wound around the substrate 31, and under the condition that the winding density is unchanged, that is, under the condition that the number of turns of the conductive coil 33 per unit length is unchanged, the smaller the volume of the conductive coil 33 is, the thinner the conductive coil 33 is, and the smaller the cross-sectional area thereof is, the smaller the current flowing therethrough is; according to a heat calculation formula: q = UIt, where Q is the heat generated by the resistor, U is the voltage across the resistor, I is the current flowing through the resistor, and t is the time, it can be seen that the less heat is generated by the conductive coil 33 itself at this time; that is, the smaller the volume of the conductive coil 33 is, the less heat is generated by the conductive coil 33 itself, on the premise that the winding density of the conductive coil 33 is constant. In one embodiment, for example, the conductive coil 33 formed on the substrate 31 by silk-screening, sputtering, printing, etc. has a smaller volume than the conductive coil 33 formed by winding metal wire around the substrate 31, which can improve the self-heating problem of the conductive coil 33 to some extent. Meanwhile, since the conductive coil 33 is disposed on the substrate 31, heat generated from the conductive coil 33 is more easily conducted to the substrate 31 to be utilized. Therefore, in the embodiment, the conductive coil 33 formed on the substrate 31 by silk-screen printing is preferred, and the conductive coil 33 may be 33a/33b/33c according to the following embodiments.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a conductive coil of a heating element 30 according to an embodiment of the present disclosure. In a specific embodiment, the conductive coil 33a is uniformly wound on the outer wall surface of the substrate 31, that is, the winding density is the same at each position on the substrate 31 corresponding to the region where the conductive coil 33a is located, so that the conductive coil 33a generates a uniformly varying magnetic field at each position, and the substrate 31 or the radiation heating layer 32 induces the uniformly varying magnetic field to generate eddy currents, so that the temperature rise rates at each position are the same, that is, the temperature of each position on the substrate 31 or the radiation heating layer 32 corresponding to the region where the conductive coil 33a is located is the same, so that the heating assembly 30 can heat the aerosol-generating article more uniformly. Because of the positive correlation of the winding density and the heating rate of the conductive coil 33a, the temperature field of the heating assembly can be preset only by setting the winding density of the conductive coil, so that the optimal preheating effect is achieved, the technical scheme is simpler, and other assemblies do not need to be additionally arranged.

In another embodiment, please refer to fig. 4, wherein fig. 4 is a schematic structural diagram of the conductive coil for heating the heating element according to another embodiment of the present application. The conductive coil 33b includes a first line 331b and a second line 332b connected to each other, the first line 331b and the second line 332b are uniformly wound on the outer wall surface of the substrate 31, and the winding density of the first line 331b is greater than that of the second line 332 b. It is easy to understand that, when the conductive coil 33b is energized, the intensity of the variable magnetic field generated by the first segment 331b is greater than the intensity of the variable magnetic field generated by the second segment 332b, so that the temperature rising rate of the area where the substrate 31 or the radiation heating layer 32 corresponding to the first segment 331b is greater than the temperature rising rate of the area where the radiation heating layer 32 corresponding to the second segment 332b is located, thereby realizing rapid heating of the local area of the heating assembly 30, enabling the heating assembly 30 to heat the local aerosol-generating product in the initial heating stage, and effectively ensuring sufficient mist output in the initial heating stage. Therefore, the first line segment 331b may be selectively disposed on the corresponding region of the heating assembly 30 that needs to be rapidly heated.

Specifically, the winding density of the first and second segments 331b and 332b and the positions and areas thereof on the substrate 31 can be set according to actual needs to meet the heating requirements of the heating assembly 30. Of course, the conductive coil 33b may further include a third line segment, a fourth line segment, a fifth line segment, and the like, and the winding density of the third line segment, the fourth line segment, the fifth line segment, and the like, and the position and the area of the third line segment, the fourth line segment, the fifth line segment, and the like on the substrate 31 may be set as required, so that gradient heating of the heating assembly 30 may also be achieved, so that the heating assembly 30 may ensure a proper amount of mist and a better suction experience in the whole heating process.

In yet another embodiment, please refer to fig. 5-6, fig. 5 is a schematic structural view of a conductive coil of a heating element according to yet another embodiment of the present application, and fig. 6 is a schematic structural view of a conductive coil of a heating element according to yet another embodiment of the present application. The conductive coil 33c includes a first conductive wire 331c and a second conductive wire 332c spaced apart from each other, the first conductive wire 331c and the second conductive wire 332c are uniformly wound around the outer wall surface of the substrate 31, and the first conductive wire 331c and the second conductive wire 332c are alternately wound, wherein the first conductive wire 331c and the second conductive wire 332c can be selectively conducted. Specifically, the first conductive lines 331c and the second conductive lines 332c are alternately wound on the substrate 31 at intervals, and the winding density of the first conductive lines 331c is greater than that of the second conductive lines 332c. From the above, it can be understood that when the heating element 30 is powered on, if the first wire 331c is selected to be powered on, the strength of the varying magnetic field generated by the first wire 331c is large due to the large winding density of the first wire 331c, the temperature rising rate of the substrate 31 or the radiation heating layer 32 is large; if the second wire 332c is selected to be connected, since the second wire 332c has a small winding density, the intensity of the varying magnetic field generated by the second wire is small, and the temperature increase rate of the substrate 31 or the radiation heating layer 32 is small. It is easy to understand that when the heating assembly 30 is powered on to work, in the initial heating stage, due to the requirement of rapid mist generation, the temperature needs to be raised rapidly for heating, the first conducting wire 331c with high winding density can be selectively connected, and in the middle and later heating stages, because too high heat is not needed after heat accumulation in the initial heating stage, the second conducting wire 332c with low winding density can be selectively connected, so that the heating assembly 30 can save energy while ensuring sufficient mist generation amount in the heating process; this arrangement is understood to mean that the heating element 30 is controlled to switch on different heating stages during different heating periods, the first stage of heating is controlled to switch on the first stage, i.e. to switch on the first wire 331c, and the second stage of heating is controlled to switch on the second stage, i.e. to switch on the second wire 332c. Of course, in order to meet the setting requirement of the heating assembly 30 for a more precise temperature field, the conductive coil 33c may further include a third wire, a fourth wire, and the like, and correspondingly, the heating gear may further include a third gear, a fourth gear, and the like, so as to achieve gradient heating of the heating assembly 30, and thus the heating assembly 30 may ensure a proper amount of mist and a better suction experience in the whole heating process.

In a particular embodiment, the conductive coil 33/33a/33b/33c may also have a linear Temperature Coefficient of Resistance (TCR) characteristic, such that it may act as a temperature sensor. Specifically, the heating element 30 further includes a detection circuit 37, wherein the detection circuit 37 is electrically connected to the electrically conductive coil 33/33a/33b/33c for detecting an electrical parameter of the electrically conductive coil 33/33a/33b/33c, wherein the electrical parameter may be a current value or a resistance value, and then the heating temperature of the radiation heating layer 32 is characterized according to the detected electrical parameter and the TCR characteristics. It is easy to understand that, because the conductive coil 33/33a/33b/33c has TCR characteristics, the resistance value of the conductive coil 33/33a/33b/33c has a monotonic one-to-one correspondence relationship with the temperature value thereof, that is, each resistance value corresponds to a different temperature value, and the resistance value of the conductive coil 33/33a/33b/33c increases with the increase of the temperature value thereof, or the resistance value decreases with the increase of the temperature value thereof; generally, the voltage across the conductive coil 33/33a/33b/33c is constant, and then according to ohm's law, the current value flowing through the conductive coil 33/33a/33b/33c is inversely proportional to the resistance value thereof, so that the detection circuit 37 can detect the current value or the resistance value of the conductive coil 33/33a/33b/33c to represent the temperature value of the heating element 30, thereby implementing the temperature measurement function of the heating element 30, and adjusting and controlling the temperature field of the heating element 30 according to the temperature value to ensure that the fog generation amount is more uniform during the heating process. Compared with the prior art that temperature measuring elements such as a temperature sensor need to be additionally arranged, the heating assembly 30 does not need to be additionally provided with devices for sensing the temperature such as the temperature sensor, so that the volume of the heating assembly 30 is smaller, and the volume of the product is smaller, for example, an aerosol generating device is smaller in volume, so that the aerosol generating device is more convenient to carry and use.

Referring to fig. 7, fig. 7 is a side sectional view of a second embodiment of a substrate-heating element. The heating assembly 30 further includes a reflective layer 36, the reflective layer 36 being disposed around an outer side of the radiation heating layer 32 for reflecting radiation radiated by the radiation heating layer 32. Specifically, when the heating assembly 30 is electrically heated, the radiation heating layer 32 not only radiates the radiation to the receiving cavity in the base 31 to heat and atomize the aerosol-generating product, but also radiates the radiation to the outside of the base 31, and the reflective layer 36 disposed outside the radiation heating layer 32 can prevent the radiation from being emitted to the outside of the base 31 and reflect the radiation back to the receiving cavity inside the base 31 to heat and atomize the aerosol-generating product, so that the heat loss of the heating assembly 30 is reduced, and the heating efficiency of the heating assembly 30 is improved.

The reflective layer 36 may be a material with low infrared emissivity, such as a metal material, e.g., aluminum, gold, silver, or a high temperature resistant polymer material, e.g., a PI film; generally, the reflective layer 36 is made of metal, because the reflective layer 36 is made of metal and has better reflective effect and high temperature resistance. In order to further improve the reflection effect, the reflection layer 36 may also have a mirror effect, so that the radiation radiated outward is totally reflected back into the substrate 31, and thus the heat loss of the heating assembly 30 is smaller, and the heating efficiency is higher. The reflective layer 36 may be formed on the substrate 31 by coating, sputtering, printing, or metal plating.

In one embodiment, referring to fig. 7, the reflective layer 36 may be disposed around a side of the conductive coil 33/33a/33b/33c facing away from the substrate 31 to prevent heat radiation radiated from the radiation heating layer 32 from being emitted to the outside of the heating element 30 and causing heat loss, and reflect the heat radiation back to the receiving cavity in the substrate 31. Please refer to fig. 8, it should be noted that if the reflective layer 36 is made of a metal material, a short circuit problem is easily caused between the conductive coil 33/33a/33b/33c and the reflective layer 36 when the conductive coil 33/33a/33b/33c is powered on, so that an insulating layer 34 is also required to be disposed between the conductive coil 33/33a/33b/33c and the reflective layer 36 to ensure insulation between the conductive coil 33/33a/33b/33c and the reflective layer 36, and specific materials and processes of the insulating layer 34 are the same as those described above, and are not repeated herein.

In another embodiment, please refer to fig. 9, and fig. 9 is a schematic structural diagram of a conductive coil of a heating element according to another embodiment of the present application. In this embodiment, the reflective layer 36 is provided on the outer wall surface of the sidewall of the base 31 and between the base 31 and the insulating layer 34.

In yet another embodiment, please refer to fig. 10, wherein fig. 10 is a schematic structural view of a conductive coil of a heating element according to yet another embodiment of the present application. In this embodiment, the reflective layer 36 may also be disposed on a side surface of the base 31 close to the radiation heating layer 32 and between the base 31 and the radiation heating layer 32, so that the heating radiation radiated outward is directly reflected by the reflective layer 36 back to the accommodating cavity in the base 31 without passing through the base 31, and the path of the heating radiation radiated outward by the radiation heating layer 32 is further shortened, thereby reducing the attenuation of the heating radiation and further improving the heating efficiency.

Further, since the radiation heating layer 32 is provided on the inner wall surface of the base 31, the aerosol-generating product accommodated in the base 31 is easily scratched or stained. To this end, referring to FIG. 11, FIG. 11 is a side wall cross-sectional view of a sixth embodiment of a substrate-heating element; in this embodiment, the heating assembly 30 further comprises a protective layer 35, the protective layer 35 is arranged on the side of the radiation heating layer 32 facing away from the base 31, and the protective layer 35 completely covers the radiation heating layer 32 to avoid the problem that the radiation heating layer 32 is in contact with the aerosol-generating article, which could result in scratching or staining of the radiation heating layer 32 by the aerosol-generating article.

In this embodiment, the protective layer 35 may be specifically an infrared-transparent high-temperature-resistant material, such as transparent ceramic enamel, infrared-transparent glass, etc., which can both protect the radiation heating layer 32 from scratches or contamination and also allow heating rays to pass through without affecting the heating effect of the heating element 30.

It is noted that in the above embodiment, the radiation heating layer 32 itself does not self-heat, but the varying magnetic field generated by the electrically conductive coil 33/33a/33b/33c when energized causes the substrate 31 to heat up by generating eddy currents, and then transfers heat to the radiation heating layer 32 by thermal conduction, thereby causing the radiation heating layer 32 to heat up and be excited to heat and atomize the aerosol-generating article with radiation rays.

In another embodiment, as shown in FIGS. 12-19, FIGS. 12-19 are side wall cross-sectional views of embodiments of a radiant heating layer heat generating heating assembly. Unlike the above-described embodiment, the radiation heating layer 32 is doped with metal particles; the electrically conductive coils 33/33a/33b/33c produce a changing magnetic field when energized, and the metal particles within the radiant heating layer 32, when induced to the changing magnetic field, generate eddy currents that heat up, causing the radiant heating layer 32 to excite, and the radiant heating rays to heat and atomize the aerosol-generating article. The radiant heating layer 32 contains metal particles, which may be ferrite metal particles, such as pure iron particles, stainless steel particles, carbon steel particles, silicon steel particles, or iron alloy particles.

In this embodiment, please refer to fig. 12, fig. 12 is a side wall sectional view of the first embodiment of the heating assembly for generating heat by the radiation heating layer. The substrate 31 may be made of an insulating material, such as ceramic, quartz glass, mica, and other high temperature resistant insulating materials. The conductive coils 33/33a/33b/33c are arranged on the outer surface of the side wall of the substrate 31; the following examples are given as examples. It will be appreciated that in this embodiment the insulating substrate 31 does not act as a heat conducting means, primarily for supporting the radiation heating layer 32 and the electrically conductive coil 33/33a/33b/33c, and for housing the aerosol-generating article.

Of course, when the conductive coil 33/33a/33b/33c is disposed on the outer surface of the sidewall of the substrate 31, the substrate 31 may be made of a material capable of inducing a changing magnetic field to generate eddy current and generate heat; at this time, the substrate 31 and the radiation heating layer 32 are both in a varying magnetic field to generate eddy current heating at the same time, thereby improving heating efficiency. The specific arrangement of the conductive coil 33 in the specific embodiment can be referred to the arrangement of the conductive coil in the above-mentioned embodiments of fig. 3 to 6.

Certainly, in other embodiments, the conductive coil 33 may also be disposed on the inner side of the substrate 31, and in order to prevent a short circuit problem caused by the electrical connection between the conductive coil 33 and the radiation heating layer 32, an insulating layer 34 may be further disposed between the conductive coil 33 and the radiation heating layer 32, and the specific disposing manner may refer to the disposing manner of the insulating layer 34, which is not described herein again. For example, an insulating layer may be disposed between the conductive coil 33/33a/33b/33c and the radiation heating layer 32 and between the conductive coil 33/33a/33b/33c and the substrate 31, respectively, to prevent short circuit between the conductive coil 33/33a/33b/33c and the radiation heating layer 32 or the substrate 31, which may result in the heating element 30 failing to operate properly. In this embodiment, the substrate 31 may be insulating or conductive, and is not limited thereto.

According to researches, the closer the distance between the conductive coil 33/33a/33b/33c and the magnetic induction element is, the more easily the heat generated by the conductive coil 33/33a/33b/33c is absorbed by the magnetic induction element to increase the temperature, and the higher the utilization rate of the part of heat is. Here, the magnetic induction element is an element that can induce a variable magnetic field to generate an eddy current and increase the temperature; it is easily understood that the metal-based matrix 31 or the radiation heating layer 32 doped with metal particles referred to in the above embodiments is the magnetic induction element in the present embodiment. For example, when the radiation heating layer 32 is used as a magnetic induction element, the smaller the thickness of the substrate 31 is, the closer the distance between the conductive coil 33/33a/33b/33c and the radiation heating layer 32 is, the more easily the heat generated by the conductive coil 33/33a/33b/33c is absorbed by the radiation heating layer 32 to increase the temperature, and the higher the utilization rate of the heat is; therefore, the thickness of the base 31 can be set as small as possible while satisfying other requirements.

In an embodiment, please refer to fig. 20, in which fig. 20 is a schematic structural diagram of an aerosol generating device according to an embodiment of the present application. In the present embodiment, an aerosol-generating device is provided that includes the heating assembly 30 and the power supply assembly 10 according to the above-described embodiments. Wherein, the heating component 30 is used for heating and atomizing aerosol to generate products when being electrified, and the products are sucked by users; in particular, the heating element 30 is hollow tubular with a receiving cavity formed therein in which the aerosol-generating article is removably received. The specific structure and function of the heating element 30 can be referred to in the description of the heating element 30 provided in the above embodiments, and the same or similar technical effects can be achieved, and are not described herein again.

Further, the aerosol-generating device further comprises a control unit 20, the control unit 20 being electrically connected to the heating assembly 30 and the power supply assembly 10; specifically, control unit 20 is electrically connected to electrically conductive coil 33/33a/33b/33c of heating element 30 and detection circuit 37; when the aerosol generating device is powered on to work, the control unit 20 correspondingly controls the heating element 30 according to the temperature value detected by the detection circuit 37, for example, the current value of the conductive coil 33/33a/33b/33c is controlled to realize the control of the temperature field, or the first lead 331c or the second lead 332c of the conductive coil 33/33a/33b/33c is selectively switched on according to the temperature value, that is, different heating gears are selectively switched on to control the temperature field of the heating element 30, so that the mist outlet rate of the aerosol generating device is increased when the aerosol generating device works, and the mist outlet amount is more balanced and reasonable, so as to achieve the optimal atomization effect.

The power supply assembly 10 is electrically connected to the heating assembly 30 and the control unit 20 for supplying power to the heating assembly 30 and the control unit 20 to ensure that the aerosol generating device is able to function properly. The power module 10 may be a dry battery, a lithium battery, or the like.

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 (13)

1. A heating assembly, comprising:

a base body in a hollow tubular shape;

a radiation heating layer provided on one side of an inner wall surface of the base body, for radiating a ray when heated; and

and the conductive coil is arranged around the substrate and used for generating a changing magnetic field when being electrified so as to heat the radiation heating layer.

2. The heating assembly of claim 1, wherein the electrically conductive coil generates a changing magnetic field when energized, causing the substrate to generate eddy currents and heat up to heat the radiant heating layer.

3. The heating assembly of claim 2, wherein the base is a metal substrate.

4. The heating assembly of claim 2, further comprising an insulating layer disposed between the outer wall surface of the substrate and the electrically conductive coil, the electrically conductive coil being circumferentially disposed about the insulating layer.

5. The heating assembly of claim 1, wherein the electrically conductive coil generates a changing magnetic field when energized, causing the radiant heating layer to generate eddy currents to be heated.

6. The heating element of claim 5, wherein the matrix is an insulating matrix and the radiant heating layer is doped with metal particles.

7. The heating assembly of any of claims 2-5, further comprising a reflective layer disposed around an outer side of the radiant heating layer for reflecting radiation radiated by the radiant heating layer.

8. The heating assembly of claim 7, wherein the reflective layer is disposed in a stack on a side of the electrically conductive coil facing away from the substrate and around the electrically conductive coil for reflecting heating radiation emitted by the radiant heating layer.

9. The heating assembly of claim 7, further comprising a protective layer disposed in a stack on a side of the radiant heating layer facing away from the base.

10. The heating element of any one of claims 1 to 5, wherein the electrically conductive coil is uniformly wound around the outer wall surface of the substrate; or

The conductive coil comprises a first line segment and a second line segment which are connected, the first line segment and the second line segment uniformly wind on the outer wall surface of the substrate, wherein the winding density of the first line segment is greater than that of the second line segment; or

The conductive coil comprises a first lead and a second lead which are spaced apart from each other, the first lead and the second lead are uniformly wound on the outer wall surface of the substrate, the first lead and the second lead are wound in a staggered mode, and the first lead and the second lead can be selectively conducted.

11. The heating assembly of claim 1, wherein the electrically conductive coil has a linear temperature coefficient of resistance characteristic, the heating assembly further comprising a detection circuit for detecting an electrical parameter of the electrically conductive coil to characterize a temperature of the radiant heating layer.

12. The heating assembly of any one of claims 1 to 5, wherein the radiant heating layer is an infrared layer.

13. An aerosol-generating device, comprising:

a heating assembly for heating and atomising an aerosol-generating article when energised, the heating assembly being as claimed in any of claims 1 to 12;

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

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