Aerosol generator and its heating structure

Abstract

The present invention provides an aerosol generating device (1) and a heating structure (10) for the same. The heating structure (10) includes a heating element (12) capable of emitting infrared light waves when energized and a tube (11) associated with the heating element (12) through which infrared light waves are transmitted, with a gap between the heating element (12) and the wall of the tube (11). The heating element (12) includes a heating portion (121) and a conductive portion (122). The heating portion (121) includes at least two spaced-apart heating sections (1211, 1212), which are electrically connected to the conductive portion (122). The heating element (12) does not overburn the aerosol-forming matrix (2), significantly improving the smoking experience and significantly shortening the pre-heating time under high-temperature operating conditions, thereby significantly improving the consumer experience. The heating element (121) can perform stepwise heating in accordance with various aerosol-forming matrices (2), and the temperature field distribution is reasonable.

Description

[Technical Field]

[0001] The present invention relates to the technical field of non-combustion heating atomization, and more specifically relates to an aerosol generating device and a heat generating structure thereof. [Background Art]

[0002] In the related art, an aerosol generating device is an electronic device that heats rather than burns an aerosol-forming matrix (a solid matrix such as a leaf product of a plant like tobacco). Generally, an aerosol generating device adopts central heating or peripheral heating of a heating element. Usually, the heating element is energized to generate heat, and the heat is directly transferred to the aerosol-forming matrix through heat conduction. The aerosol-forming matrix is usually atomized at a temperature of 350°C or lower. The disadvantage of this heating method is that since the heating element transfers heat to the aerosol-forming matrix directly or indirectly through a solid material, it is necessary to prevent the operating temperature of the heating element from becoming too high; otherwise, the medium will burn excessively, which adversely affects the smoking experience of the electronic cigarette.

[0003] In addition, due to the low temperature of the heating element, it is necessary to preheat the aerosol generating device for a long time before a puff. At present, the preheating time of most commercial products is more than 15 seconds, which greatly affects the consumer experience. Furthermore, since the operating temperature of the heating element exceeds 400°C, the aerosol-forming matrix is prone to excessive combustion, which adversely affects the smoking experience. Therefore, rationally configuring the heat generating structure under high-temperature operating conditions is an urgent issue to be solved in this field. [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] The technical problem to be solved by the present invention is to provide an improved aerosol generating device and a heat generating structure thereof. [Means for Solving the Problem]

[0005] The technical solution employed by the present invention to solve its technical problems is as follows: A heating structure comprising a heating element capable of emitting infrared light waves when energized, and a tube through which the infrared light waves are transmitted, provided in conjunction with the heating element, wherein the walls of the heating element and the tube are provided at least partially spaced apart, the heating element comprises a heating portion and a conductive portion, the heating portion comprises at least two heating sections spaced apart, and the heating sections are electrically connected to the conductive portion.

[0006] In some embodiments, the heating structure further includes a frame, the frame being provided on the tube, and at least one of the heating sections being provided on the frame.

[0007] In some embodiments, the frame comprises a first frame, a second frame, a third frame, and a fourth frame, and the at least two heating sections comprise a first heating section and a second heating section connected to the first heating section, wherein the first frame and the second frame are spaced apart from the first heating section, and the third frame and the fourth frame are spaced apart from the second heating section.

[0008] In some embodiments, the heating element is provided longitudinally, and the at least two heating sections include a first heating section and a second heating section connected to the first heating section, wherein the first heating section and / or the second heating section are wound around the frame in an M-shape and an N-shape.

[0009] In some embodiments, the length of the first heating section is less than or greater than the length of the second heating section.

[0010] In some embodiments, the first heating section and the second heating section include a plurality of spaced-apart M-shaped or N-shaped sections.

[0011] In some embodiments, the plurality of M-shaped or N-shaped sections are formed by winding or bending elongated or wire-shaped heating wires, and the distribution density of the plurality of M-shaped or N-shaped sections of the first heating section in the frame is less than or equal to, or greater than, the distribution density of the plurality of M-shaped or N-shaped sections of the second heating section in the frame.

[0012] In some embodiments, the radial dimension of the first frame is equal to the radial dimension of the second frame, and the radial dimension of the third frame is less than or greater than the radial dimension of the second frame.

[0013] In some embodiments, the radial dimension of the first frame is less than the radial dimension of the second frame, and the radial dimension of the third frame is less than or greater than the radial dimension of the second frame.

[0014] In some embodiments, the radial dimension of the first frame is greater than the radial dimension of the second frame, and the radial dimension of the third frame is less than or greater than the radial dimension of the second frame.

[0015] In some embodiments, the first frame includes a plurality of first wire grooves provided on the outer periphery of the first frame, the second frame includes second wire grooves corresponding to the plurality of first wire grooves, and the heating element is wound in an M-shape or N-shape around the plurality of first wire grooves and the plurality of second wire grooves, the third frame includes a plurality of third wire grooves provided on the outer periphery of the third frame, the fourth frame includes fourth wire grooves corresponding to the plurality of third wire grooves, and the heating element is wound in an M-shape or N-shape around the plurality of third wire grooves and the plurality of fourth wire grooves.

[0016] In some embodiments, when the distance between the plurality of first wire grooves and the tube is equal to the distance between the plurality of second wire grooves and the tube, the distance between the plurality of third wire grooves and the tube is greater than or less than the distance between the plurality of fourth wire grooves and the tube.

[0017] In some embodiments, if the distance between the plurality of first wire grooves and the tube is less than the distance between the plurality of second wire grooves and the tube, the distance between the plurality of third wire grooves and the tube is greater than or less than the distance between the plurality of fourth wire grooves and the tube.

[0018] In some embodiments, if the distance between the plurality of first wire grooves and the tube is greater than the distance between the plurality of second wire grooves and the tube, the distance between the plurality of third wire grooves and the tube is greater than or less than the distance between the plurality of fourth wire grooves and the tube.

[0019] In some embodiments, the heating element includes a heating substrate that generates heat when energized, and an infrared radiation layer provided on the outer surface of the heating substrate for emitting infrared light waves.

[0020] In some embodiments, the heating structure further includes a base, the tube is attached to the base, and the conductive portion of the heating element penetrates the base.

[0021] In some embodiments, the heating element is located inside the tube, and there is a gap between the heating element and the inner wall of the tube.

[0022] In some embodiments, the tube includes a first sleeve and a second sleeve fitted over the outer circumference of the first sleeve. There is a gap between the first sleeve and the second sleeve, and this gap forms a cavity for housing the heating element. The heating element is provided on an outer periphery of the first sleeve at intervals, and a heating cavity for heating an aerosol-forming matrix is formed inside the first sleeve.

[0023] In some embodiments, an inner wall of the second sleeve is provided with a reflective layer that reflects infrared light waves.

[0024] In some embodiments, when a distance between the plurality of first wire grooves and the first sleeve is equal to a distance between the plurality of second wire grooves and the first sleeve, a distance between the plurality of third wire grooves and the first sleeve is greater than or less than a distance between the plurality of fourth wire grooves and the first sleeve.

[0025] In some embodiments, when a distance between the plurality of first wire grooves and the first sleeve is less than a distance between the plurality of second wire grooves and the first sleeve, a distance between the plurality of third wire grooves and the first sleeve is greater than or less than a distance between the plurality of fourth wire grooves and the first sleeve.

[0026] In some embodiments, when a distance between the plurality of first wire grooves and the first sleeve is greater than a distance between the plurality of second wire grooves and the first sleeve, a distance between the plurality of third wire grooves and the first sleeve is greater than or less than a distance between the plurality of fourth wire grooves and the first sleeve.

[0027] The present invention also provides an aerosol generating device comprising the heat generating structure according to any one of the above. Effects of the Invention

[0028] The beneficial effects of the present invention are as follows: The heating element of the heating structure of the present invention can emit infrared light waves when energized, and these infrared light waves can penetrate the tube and reach the aerosol-forming matrix, thereby heating it. When the maximum operating temperature of the heating element reaches 1000°C or higher (the operating temperature of the heating element of conventional HNBs is usually 400°C or lower), the aerosol-forming matrix does not burn excessively, which can greatly improve the smoking sensation, and can also greatly shorten the preheating time, greatly improving the consumer experience.

[0029] Since the heating element includes at least two spaced heating sections, it can perform stepwise heating to suit various aerosol-forming matrices, rationally distribute the temperature field, avoid scorching of parts of the matrix, and further enhance the smoking experience. [Brief explanation of the drawing]

[0030] The present invention will be further described below with reference to the drawings and examples. In the drawings, [Figure 1] This is a schematic perspective view of an aerosol generator in several embodiments of the present invention. [Figure 2] Figure 1 is a schematic cross-sectional view of the heat generation structure of the aerosol generator shown. [Figure 3] Figure 2 is a schematic diagram of the disassembled structure of the heat-generating structure. [Figure 4] Figure 1 is a schematic perspective view showing the heating element when it is wound in an M-shape around the first and second frames and the third and fourth frames, which have different radial dimensions. [Figure 5] This is a schematic cross-sectional view of a heating structure according to another embodiment of the present invention. [Figure 6] Figure 5 is a schematic diagram of the disassembled structure of the heat-generating structure. [Modes for carrying out the invention]

[0031] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the invention will be described in detail with reference to the drawings.

[0032] In the description of the present invention, terms such as "vertical direction," "axial direction," "length," "width," "top," "bottom," "summit," "bottom," "inside," and "outside" refer to directions or positional relationships based on the directions shown in the drawings or the directions or positional relationships in which the product of the present invention is always positioned when in use. These terms are used to facilitate the explanation of the present invention and to simplify the explanation, and do not indicate or imply that the device or element has a specific direction, or that it must be configured and operate in a specific direction. Therefore, they should not be interpreted as limiting the present invention.

[0033] Furthermore, the terms “first” and “second” are for descriptive purposes only and should not be understood as indicating or implying relative importance or the number of technical features described. Therefore, features limited by “first” and “second” may explicitly or implicitly include at least one such feature. In this description, “multiple” means at least two sections, e.g., two sections, three, etc., unless otherwise explicitly specified.

[0034] In the present invention, unless otherwise explicitly defined and limited, terms such as “attach,” “connect,” and “fix” should be understood in a broad sense, and may refer to, for example, a fixed connection, a removable connection, or an integral connection. They may be mechanical or electrical connections. Unless otherwise explicitly defined, they may be direct connections, indirect connections via an intermediate medium, internal communication between two elements, or interaction relationships between two elements. The specific meanings of these terms in the present invention can be understood by those skilled in the art depending on the context.

[0035] Figure 1 shows an aerosol generator 1 in several embodiments of the present invention, and an aerosol-forming matrix 2 detachably inserted at one end of the aerosol generator 1. In some embodiments, the aerosol generator 1 may be prismatic in shape so that it can be easily grasped by the user, and is used to bake and heat the aerosol-forming matrix 2 inserted therein at a low temperature to release the aerosol extract within the aerosol-forming matrix 2 in a non-combustible state, and has good atomization stability and a good mouthfeel for the atomized product. In some embodiments, the aerosol-forming matrix 2 may be cylindrical, or may be a strand-like or sheet-like solid material made from plant leaves and / or stems, and furthermore, aromatic components may be added to the solid material. Understandably, the aerosol generator 1 is not limited to a prismatic shape, and in some other embodiments, it may be in other shapes such as cylindrical or elliptical.

[0036] In some embodiments, the aerosol generator 1 may include a heating structure 10 and a housing 20 for mounting the heating structure 10. In some embodiments, the heating structure 10 may be cylindrical and have a removable aerosol-forming matrix 2 inserted into it, which heats and bakes the aerosol-forming matrix 2 from the outside. Alternatively, the aerosol-forming matrix 2 is placed over the heating structure 10, which heats and bakes the aerosol-forming matrix 2 from the inside. In some embodiments, the aerosol generator 1 may further include a power supply assembly (not shown) provided within the housing 20. The heating structure 10 may be partially inserted into the aerosol-forming matrix, specifically partially inserted into a medium section of the aerosol-forming matrix 2, and can radiate heat when energized to heat the medium section of the aerosol-forming matrix 2, atomize it, and generate an aerosol. In this embodiment, the heat radiation may be thermal infrared radiation. The heating structure 10 has the advantages of being easy to assemble, having a simple structure, high atomization efficiency, high stability, and a long service life. The power supply assembly is electrically connected to the heating structure 10 and supplies power to the heating structure 10.

[0037] Referring also to Figures 2 and 3, in some embodiments the heating structure 10 may include a tube 11, a heating element 12, a first frame 13, a second frame 14, a third frame 15, a fourth frame 16, and a base 17. The heating element 12 is provided in an M-shape or N-shape on the first frame 13 and the second frame 14 and the third frame 15 and the fourth frame 16, and the heating element 12 is provided within the tube 11 together with the first frame 13 and the second frame 14 and the third frame 15 and the fourth frame 16. The tube 11 covers at least a portion of the heating element 12 and is used to allow light waves to pass through and reach the aerosol-forming matrix 2. Specifically, in this embodiment, the tube 11 allows infrared light waves to pass through, facilitating the heating of the aerosol-forming matrix 2 by infrared light wave emission from the heating element 12. Specifically, there is a gap between the heating element 12 and the tube 11, and when energized, the heating element 12 rapidly heats up to 1000-1300°C in 1-3 seconds, the surface temperature of the tube 11 may be controlled to 350°C or less, and the atomization temperature of the entire aerosol-forming matrix 2 is controlled to 300-350°C, thereby enabling accurate atomization of the aerosol-forming matrix 2 in the wavelength range of 2-5 μm. Specifically, the heating element 12 includes a heating section 121 that emits infrared light waves when energized, and two conductive sections 122, the heating section 121 including two heating sections, the two heating sections being a first heating section 1211 and a second heating section 1212 connected to the first heating section 1211, respectively. The first heating section 1211 includes a first end 1201 and a second end 1202 provided opposite the first end 1201. The second heating section 1212 includes a third end 1203 connected to a second end 1202 and a fourth end 1204 provided opposite the third end 1203. The two conductive parts 122 are each connected to the fourth end 1204 of the second heating section 1212. The first frame 13 and the second frame 14 are spaced apart from the first end 1201 and the second end 1202, respectively. The third frame 15 and the fourth frame 16 are spaced apart from the third end 1203 and the fourth end 1204, respectively.The first heating section 1211 is wound in an M-shape or N-shape around the first frame 13 and the second frame 14, and the second heating section 1212 is wound in an M-shape or N-shape around the third frame 15 and the fourth frame 16. The base 17 is provided at the lower open end of the tube 11, and the two conductive parts 122 are inserted into the base 17 to secure the heating element 12. Understandably, the number of heating sections is not limited to two, and there may be two or more to heat the aerosol-forming matrix 2 in stages to suit various aerosol-forming matrices 2. In some embodiments, the heating structure 10 may further include support rods (not shown) which are used to secure the first frame 13, the second frame 14, the third frame 15, and the fourth frame 16 to the inner surface of the tube 11 by connecting the first frame 13 and the second frame 14 and the third frame 15 and the fourth frame 16 to each other and inserting them into the base 17. As can be understood, in other embodiments, the first frame 13, second frame 14, third frame 15, and fourth frame 16 may be fixed to the inner surface of the tube 11 by direct adhesion, bonding, thermal melting, or any other means. The maximum operating temperature of the heating element 12 is 500°C to 1300°C, far exceeding the 400°C of the prior art, thereby avoiding problems such as scorching and uneven texture in high-temperature operating environments, and significantly shortening the preheating time.

[0038] In some embodiments, the tube 11 may be hollow tubular. Specifically, the tube 11 includes a tubular body 111 which is circular in cross-section, and a tip structure 112 provided at one end of the tubular body 111. Of course, as can be understood, in some other embodiments, the cross-section of the tubular body 111 is not limited to circular. The tubular body 111 is a hollow structure with one end open. The tube 11 may be attached to the base 17, specifically, the tube 11 may be partially inserted into the base 17. Its opening may be located within the base 17. The tip structure 112 is located at the end of the tubular body 111 away from the opening. The provision of the tip structure 112 facilitates insertion and removal of at least a portion of the heating structure 10 into and out of the aerosol-forming matrix 2. In this embodiment, a first containment cavity 113 is formed inside the tube 11, and the first containment cavity 113 is a columnar cavity and may be provided in an open state. The first containment cavity 113 does not require vacuum suction or inert gas filling when the heating element 12 is installed inside it. Understandably, in some other embodiments, the heating element 12 may be spaced out on the outer circumference of the tube 11, and a second containment cavity for containing the aerosol-forming matrix 2 may be formed inside the tube 11. In this embodiment, there is a gap between the inner wall of the tube 11 and the heating element 12, and this gap is for air filling or is under vacuum. The gap is provided to prevent direct contact between the tube 11 and the heating element 12.

[0039] In some embodiments, the first frame 13 may be annular and may include a plurality of first wire grooves 131 provided at equal intervals on the outer periphery of the first frame 13. In some embodiments, the second frame 14 may be annular and may include a plurality of second wire grooves 141 provided on the outer periphery of the second frame 14 and corresponding to the plurality of first wire grooves 131. In some embodiments, the third frame 15 may be annular and may include a plurality of third wire grooves 151 provided on the outer periphery of the third frame 15. In some embodiments, the fourth frame 16 may be annular and may include a plurality of fourth wire grooves 161 provided on the outer periphery of the fourth frame 16 and corresponding to the plurality of third wire grooves 151. Multiple first wire grooves 131 and multiple second wire grooves 141 are wound around the first heating section 1211, thereby winding the first heating section 1211 around the multiple first wire grooves 131 and multiple second wire grooves 141 in an M-shape or N-shape. Multiple third wire grooves 151 and multiple fourth wire grooves 161 are wound around the second heating section 1212, thereby winding the second heating section 1212 around the multiple third wire grooves 151 and multiple fourth wire grooves 161 in an M-shape or N-shape. As a result, the heating section 121 as a whole has a hollow structure, avoiding the risk of electrical conductivity at the center of the heating element 12, avoiding the phenomenon of localized non-heating of the heating element 12, and also eliminating the risk of the central heating section being blocked by the heating sections on the outer circumference. Therefore, the heat utilization rate of the heating element 12 is improved. It is understandable that the first heating section 1211 may be wound in other shapes around the plurality of first wire grooves 131 and the plurality of second wire grooves 141, in which case the second heating section 1212 may also be wound in other shapes around the plurality of third wire grooves 151 and the plurality of fourth wire grooves 161. It is understandable that the first frame 13, the second frame 14, the third frame 15, and the fourth frame 16 are not limited to annular shapes but may be other shapes such as a square annular shape, and are not limited to annular shapes but may be columnar, etc.

[0040] In some embodiments, the first heating section 1211 and the second heating section 1212 are arranged longitudinally, and the length of the first heating section 1211 is less than or greater than the length of the second heating section 1212 in order to provide stepwise heating to suit various aerosol-forming matrices 2.

[0041] In some embodiments, the first heating section 1211 and the second heating section 1212 include a plurality of M-shaped or N-shaped sections, which are formed by winding or bending elongated or wire-shaped heating wires, and the distribution density of the plurality of M-shaped or N-shaped sections in the first frame 13 and second frame 14 of the first heating section 1211 is less than or greater than the distribution density of the plurality of M-shaped or N-shaped sections in the third frame 15 and fourth frame 16 of the second heating section 1212. This provides a variety of surface temperature fields to accommodate various aerosol formation matrices 2 or various power output requirements. The higher the distribution density of the M-shaped or N-shaped sections, the higher the temperature of the temperature field.

[0042] In some embodiments, there are multiple configurations for the spacing between the tube 11 and the multiple first wire grooves 131 and the multiple second wire grooves 141, and multiple configurations for the spacing between the tube 11 and the multiple third wire grooves 151 and the multiple fourth wire grooves 161. By adjusting the spacing between the tube 11 and the multiple first wire grooves 131 and the multiple second wire grooves 141 and / or the spacing between the tube 11 and the multiple third wire grooves 151 and the multiple fourth wire grooves 161, the gap between the tube 11 and the heating element 12 can be adjusted, and furthermore, contact between the heating element 12 and the tube 11 can be avoided, preventing the local temperature of the heating element 12 from becoming too high. In addition, by adjusting the gap and thus adjusting the temperature difference between the surface of the tube 11 and the surface of the heating element 12, scorching of the aerosol-forming matrix 2 can be avoided. In some embodiments, if the distance between a plurality of first wire grooves 131 and the tube 11 is equal to the distance between a plurality of second wire grooves 141 and the tube 11, the distance between a plurality of third wire grooves 151 and the tube 11 may be greater than or less than the distance between a plurality of fourth wire grooves 161 and the tube 11. If the distance between a plurality of first wire grooves 131 and the tube 11 is less than the distance between a plurality of second wire grooves 141 and the tube 11, the distance between a plurality of third wire grooves 151 and the tube 11 may be greater than or less than the distance between a plurality of fourth wire grooves 161 and the tube 11. If the distance between a plurality of first wire grooves 131 and the tube 11 is greater than the distance between a plurality of second wire grooves 141 and the tube 11, the distance between a plurality of third wire grooves 151 and the tube 11 may be greater than or less than the distance between a plurality of fourth wire grooves 161 and the tube 11.

[0043] Furthermore, as shown in Figure 4, in some embodiments, the radial dimensions of the first frame 13 and the second frame 14 are multiple, and the radial dimensions of the third frame 15 and the fourth frame 16 are multiple. By setting the radial dimensions of the first frame 13 and the second frame 14 and the radial dimensions of the third frame 15 and the fourth frame 16, the gaps between the upper and lower ends of the heating element 12 and the tube 11 can be made different, and the temperature field can be controlled to accommodate various aerosol-forming matrices 2 or devices. The higher the winding density, the higher the temperature field. In some embodiments, if the radial dimension of the first frame 13 is equal to the radial dimension of the second frame 14, the radial dimension of the third frame 15 may be less than or greater than the radial dimension of the fourth frame 16. If the radial dimension of the first frame 13 is less than the radial dimension of the second frame 14, the radial dimension of the third frame 15 may be less than or greater than the radial dimension of the fourth frame 16. If the radial dimension of the first frame 13 is greater than the radial dimension of the second frame 14, the radial dimension of the third frame 15 may be less than or greater than the radial dimension of the fourth frame 16.

[0044] The heating element 12 includes a heating portion and a conductive portion. The heating portion includes at least two heating sections arranged at intervals, and the two heating sections may be electrically connected by a heating substrate such as a linear heating section, or by other conductive material. Alternatively, the two heating sections may heat independently, i.e., they do not need to be electrically connected. The two heating sections are controlled to heat individually or simultaneously, depending on the specific needs. The heating portion may also include three or more heating sections arranged at intervals, and the method of connecting each heating section is implemented by referring to the above. Taking a heating wire as an example, at least two heating sections may be formed by winding a single heating wire together, and the heating sections are electrically connected by linear sections of heating wire of a predetermined length. Alternatively, each heating section may consist of a separate heating wire, and each heating section may be electrically connected by a resistive material, thereby connecting each heating section in series, or each heating section may not be electrically connected but individually connected to a conductive part, and multiple heating sections may be arranged in parallel. In these arrangements, gradual heating can be reliably achieved, the temperature field can be rationally distributed, and the smoking sensation can be further improved.

[0045] In some embodiments, the heating element 12 may include a heating substrate that generates heat when energized, and an infrared radiation layer. The heating substrate is capable of generating heat when energized. The infrared radiation layer is provided on the outer surface of the heating substrate and is used to emit infrared light waves. In this embodiment, the heating substrate and the infrared radiation layer are distributed concentrically in the cross-section of the heating portion.

[0046] In this embodiment, the heating element can be wound or bent into a cylindrical shape, and specifically, the heating element may be a heating wire. Of course, as can be understood, in some other embodiments, the heating element is not limited to a cylindrical shape but may be in the form of a sheet, i.e., the heating element may be a heating sheet. The heating element includes a metal substrate having high-temperature antioxidant properties, and the metal substrate may be a metal wire. Specifically, the heating element may be made of a metal material having good high-temperature antioxidant properties, high stability, and resistance to deformation, such as a nickel-chromium alloy substrate (e.g., nickel-chromium alloy wire) or an iron-chromium-aluminum alloy substrate (e.g., iron-chromium-aluminum alloy wire). In this embodiment, the radial dimension of the heating element may be 0.15 mm to 0.8 mm.

[0047] In this embodiment, the heating element 12 further includes an antioxidant layer, which is formed between the heating substrate and the infrared radiation layer. Specifically, the antioxidant layer may be an oxide film, and the heating substrate is subjected to high-temperature heat treatment to form a dense oxide film on its surface, which serves as the antioxidant layer. Of course, it is understandable that in some other embodiments, the antioxidant layer is not limited to an oxide film formed on the heating substrate itself, and in some other embodiments, it may be an antioxidant coating applied to the outer surface of the heating substrate. The formation of the antioxidant layer ensures that the heating substrate is not oxidized or is hardly oxidized when heated in an air environment, improving the stability of the heating substrate, thereby eliminating the need for vacuum suction into the first encapsulation cavity 113, filling with an inert or reducing gas, or sealing the opening, simplifying the assembly process of the entire heating structure 10 and reducing manufacturing costs. In this embodiment, the thickness of the antioxidant layer may be 1 μm to 150 μm. If the thickness of the antioxidant layer is less than 1 μm, the heat-generating substrate becomes more susceptible to oxidation. If the thickness of the antioxidant layer is greater than 150 μm, the heat conduction between the heat-generating substrate and the infrared radiation layer is affected.

[0048] In this embodiment, the infrared radiation layer may be an infrared layer. The infrared layer may be formed on the side of the antioxidant layer away from the heat-generating substrate by high-temperature heat treatment in the infrared layer-forming substrate. In this embodiment, the infrared layer-forming substrate may be a silicon carbide, spinel, or a composite thereof. Of course, it is understandable that in some other embodiments, the infrared radiation layer is not limited to an infrared layer. In some other embodiments, the infrared radiation layer may be a composite infrared layer. In this embodiment, the infrared layer may be formed on the side of the antioxidant layer away from the heat-generating substrate by methods such as dip coating, spray coating, or brush coating. The thickness of the infrared radiation layer may be 10 μm to 300 μm, and when the thickness of the infrared radiation layer is 10 μm to 300 μm, its thermal radiation effect is relatively good, and the atomization efficiency of the aerosol-forming matrix 2 and the mouthfeel of the atomized product are relatively good. Of course, it is understandable that in some other embodiments, the thickness of the infrared radiation layer is not limited to 10 μm to 300 μm.

[0049] In some embodiments, the heating element 12 further includes a bonding layer provided between the antioxidant layer and the infrared radiation layer, which can be used to prevent localized destruction of the heating substrate and to further improve the bonding strength between the antioxidant layer and the infrared radiation layer. In some embodiments, the bonding material in the bonding layer may be glass powder, i.e., the bonding layer may be a glass powder layer. In some embodiments, the base 17 may be made of a material such as a ceramic insulating material and a PEEK high-temperature insulating material. This may include two fixed through holes 171 provided in the base 17, into which two conductive parts 122 are inserted.

[0050] Figures 5 and 6 show a heating structure 10a in a second embodiment of the present invention, the main differences from the first embodiment being as follows. In some embodiments, the heating structure 10a may include a tube 11a, a heating element 12a, a first frame 13a, a second frame 14a, a third frame 15a, and a fourth frame 16a.

[0051] The heating element 12a includes a heating portion 121a that generates heat radiation when energized, and two conductive portions 122a, the heating portion 121a includes two heating sections, the two heating sections being a first heating section 1211a and a first heating section 1211a The second heat-generating section 1212a is connected to the first heat-generating section 1211a. The first heat-generating section 1211a includes a first end 1201a and a second end 1202a provided opposite to the first end 1201a. The second heat-generating section 1212a includes a third end 1203a connected to the second end 1202a and a fourth end 1204a provided opposite to the third end 1203a. These two conductive sections 122a are each connected to the fourth end 1204a. The first frame 13a and the second frame 14a are provided parallel to and spaced apart at the first end 1201a and the second end 1202a, respectively, and the third frame 15a and the fourth frame 16a are provided parallel to and spaced apart at the third end 1203a and the fourth end 1204a, respectively. The first heating section 1211a is wound around the first frame 13a and the second frame 14a in an M-shape or N-shape, and the second heating section 1212a is wound around the third frame 15a and the fourth frame 16a in an M-shape or N-shape. Understandably, the number of heating sections is not limited to two and may be greater than two to heat the aerosol-forming matrix in stages to suit various aerosol-forming matrices. In some embodiments, the heating structure may further include support rods (not shown) used to connect the first frame 13a and the second frame 14a and the third frame 15a and the fourth frame 16a to each other. Understandably, in other embodiments, the first frame 13a, the second frame 14a, the third frame 15a, and the fourth frame 16a may be fixed to the outer surface of the tube 11a through one of the following: direct adhesion, bonding, thermal melting, etc.

[0052] In some embodiments, the tube 11a may include a first sleeve 111a and a second sleeve 112a fitted over the outer circumference of the first sleeve 111a, wherein the first sleeve 111a is a hollow structure with both ends passing through. The first sleeve 111a may be cylindrical, and its inner diameter may be slightly larger than the outer diameter of the aerosol-forming matrix. There is a gap between the first sleeve 111a and the second sleeve 112a, which forms a containment cavity for housing the heating element 12a. The axial length of the first sleeve 111a may be greater than the axial length of the second sleeve 112a. The second sleeve 112a may be fitted over the outer circumference of the first sleeve 111a, and the second sleeve 112a may be cylindrical, and its radial dimension may be greater than the radial dimension of the first sleeve 111a. In some embodiments, the heating element 12a is wound around the outer circumference of the first sleeve 111a and spaced apart from the outer wall of the second sleeve 112a, thereby creating a predetermined temperature difference between the inner wall of the containment cavity and the heating element 12a, which serves as insulation. Inside the first sleeve 111a, a heating cavity is formed for heating the aerosol-forming matrix.

[0053] In some embodiments, the inside of the second sleeve 112a is provided with a reflective layer, which is used to reflect heat from the heating element 12a and radiate it to the aerosol-forming matrix, thereby increasing the heating efficiency. Understandably, the first sleeve 111a and the second sleeve 112a are not limited to a cylindrical shape, but may have other shapes such as a rectangular tube or an elliptical tube.

[0054] In some embodiments, the second sleeve 112a further includes a fixing structure used to fix the heating element 12a.

[0055] In some embodiments, the first frame 13a may be annular and may include a plurality of first wire grooves 131a provided at equal intervals on the outer periphery of the first frame 13a. In some embodiments, the second frame 14a may be annular and may include a plurality of second wire grooves 141a provided on the outer periphery of the second frame 14a and corresponding to the plurality of first wire grooves 131a. In some embodiments, the third frame 15a may be annular and may include a plurality of third wire grooves 151a provided at equal intervals on the outer periphery of the third frame 15a. In some embodiments, the fourth frame 16a may be annular and may include a plurality of fourth wire grooves 161a provided on the outer periphery of the fourth frame 16a and corresponding to the plurality of third wire grooves 151a. Multiple first wire grooves 131a and multiple second wire grooves 141a are wound around the first heating section 1211a, thereby winding the first heating section 1211a around the multiple first wire grooves 131a and multiple second wire grooves 141a in an M-shape or N-shape. Multiple third wire grooves 151 and multiple fourth wire grooves 161 are wound around the second heating section 1212, thereby winding the second heating section 1212a around the multiple third wire grooves 151a and multiple fourth wire grooves 161a in an M-shape or N-shape. As a result, the heating section 121a has a hollow structure, avoiding the risk of conductivity at the center of the heating element 12a, avoiding the phenomenon of localized non-heating of the heating element 12a, and also eliminating the risk of the central heating section being blocked by the heating sections on the outer circumference. Therefore, the heat utilization rate of the heating element 12a is improved. It is understandable that the first heating section 1211a may be wound in other shapes around the plurality of first wire grooves 131a and plurality of second wire grooves 141a, in which case the second heating section 1212a may also be wound in other shapes around the plurality of third wire grooves 151a and plurality of fourth wire grooves 161a. It is understandable that the first frame 13a, second frame 14a, third frame 15a, and fourth frame 16a are not limited to annular shapes but may be other shapes such as a square annular shape, and are not limited to annular shapes but may be columnar, etc.

[0056] In some embodiments, there are multiple configurations for the spacing between the multiple first wire grooves 131a and multiple second wire grooves 141a and the first sleeve 111a, and there are also multiple configurations for the spacing between the multiple third wire grooves 151a and multiple fourth wire grooves 161a and the first sleeve 111a. By adjusting the spacing between the multiple first wire grooves 131a and multiple second wire grooves 141a and the first sleeve 111a and / or the spacing between the multiple third wire grooves 151a and multiple fourth wire grooves 161a and the first sleeve 111a, the gap between the first sleeve 111a and the heating element 12a can be adjusted, and furthermore, contact between the heating element 12a and the first sleeve 111a can be avoided, preventing the local temperature of the heating element 12a from becoming too high. In addition, by adjusting the gap and thus adjusting the temperature difference between the surface of the first sleeve 111a and the surface of the heating element 12a, scorching of the aerosol-forming matrix can be avoided. In some embodiments, if the distance between a plurality of first wire grooves 131a and a first sleeve 111a is equal to the distance between a plurality of second wire grooves 141a and a first sleeve 111a, the distance between a plurality of third wire grooves 151a and a first sleeve 111a may be greater than or less than the distance between a plurality of fourth wire grooves 161a and a first sleeve 111a. If the distance between a plurality of first wire grooves 131a and a first sleeve 111a is less than the distance between a plurality of second wire grooves 141a and a first sleeve 111a, the distance between a plurality of third wire grooves 151a and a first sleeve 111a may be greater than or less than the distance between a plurality of fourth wire grooves 161a and a first sleeve 111a. If the distance between multiple first wire grooves 131a and first sleeves 111a is greater than the distance between multiple second wire grooves 141a and first sleeves 111a, the distance between multiple third wire grooves 151a and first sleeves 111a may be greater than or less than the distance between multiple fourth wire grooves 161a and first sleeves 111a.

[0057] The above embodiments represent preferred embodiments of the present invention, and while the description is relatively specific and detailed, it should not be understood as limiting the scope of the patent of the present invention. Those skilled in the art can freely combine the above technical features and make some modifications and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, any transformations and modifications equivalent to the claims of the present invention should all be included within the claims of the present invention.

Claims

1. It is a heat-generating structure, The device includes a heating element capable of emitting infrared light waves when energized, and a tube through which the infrared light waves are transmitted, provided in conjunction with the heating element, wherein the walls of the heating element and the tube are at least partially spaced apart, the heating element includes a heating portion and a conductive portion, the heating portion includes at least two spaced heating sections, and the heating sections are electrically connected to the conductive portion. The heating element is characterized by comprising a heating base that generates heat when energized, an infrared radiation layer provided on the outer surface of the heating base for emitting infrared light waves, and an oxidation prevention layer formed between the heating base and the infrared radiation layer.

2. The heating structure according to claim 1, further comprising a frame, wherein the frame is provided on the tube, and at least one of the heating sections is provided on the frame.

3. The heating structure according to claim 2, wherein the frame includes a first frame, a second frame, a third frame, and a fourth frame, and the at least two heating sections include a first heating section and a second heating section connected to the first heating section, and the first frame and the second frame are each spaced apart from the first heating section, and the third frame and the fourth frame are each spaced apart from the second heating section.

4. The heating structure according to claim 2, wherein the heating portion is provided in the longitudinal direction, and the at least two heating sections include a first heating section and a second heating section connected to the first heating section, and the first heating section and / or the second heating section are wound around the frame in an M-shape and an N-shape.

5. The heating structure according to claim 4, characterized in that the length of the first heating section is less than or equal to the length of the second heating section, or greater than or equal to the length of the second heating section.

6. The heating structure according to claim 4, characterized in that the first heating section and the second heating section include a plurality of M-shaped or N-shaped sections provided at intervals.

7. The heating structure according to claim 6, characterized in that the plurality of M-shaped or N-shaped sections are formed by winding or bending a long or wire-shaped heating wire, and the distribution density of the plurality of M-shaped or N-shaped sections of the first heating section in the frame is less than or equal to, or higher than, the distribution density of the plurality of M-shaped or N-shaped sections of the second heating section in the frame.

8. The heating structure according to claim 3, characterized in that the radial dimension of the first frame is equal to the radial dimension of the second frame, and the radial dimension of the third frame is less than or equal to the radial dimension of the second frame, or greater than or equal to the radial dimension of the second frame.

9. The heating structure according to claim 3, characterized in that the radial dimension of the first frame is less than the radial dimension of the second frame, and the radial dimension of the third frame is less than or greater than the radial dimension of the second frame.

10. The heating structure according to claim 3, characterized in that the radial dimension of the first frame is greater than the radial dimension of the second frame, and the radial dimension of the third frame is less than or equal to the radial dimension of the second frame, or greater than or equal to it.

11. The heating structure according to claim 3, characterized in that the first frame includes a plurality of first wire grooves provided on the outer periphery of the first frame, the second frame includes second wire grooves corresponding to the plurality of first wire grooves, the heating portion is wound around the plurality of first wire grooves and the plurality of second wire grooves in an M-shape or N-shape, the third frame includes a plurality of third wire grooves provided on the outer periphery of the third frame, the fourth frame includes fourth wire grooves corresponding to the plurality of third wire grooves, and the heating portion is wound around the plurality of third wire grooves and the plurality of fourth wire grooves in an M-shape or N-shape.

12. The heating structure according to claim 11, characterized in that the distance between the plurality of first wire grooves and the tube is equal to the distance between the plurality of second wire grooves and the tube, and the distance between the plurality of third wire grooves and the tube is greater than or less than the distance between the plurality of fourth wire grooves and the tube.

13. The heating structure according to claim 11, characterized in that the distance between the plurality of first wire grooves and the tube is less than the distance between the plurality of second wire grooves and the tube, and the distance between the plurality of third wire grooves and the tube is greater than or less than the distance between the plurality of fourth wire grooves and the tube.

14. The heating structure according to claim 11, characterized in that the distance between the plurality of first wire grooves and the tube is greater than the distance between the plurality of second wire grooves and the tube, and the distance between the plurality of third wire grooves and the tube is greater than or less than the distance between the plurality of fourth wire grooves and the tube.

15. The heating structure according to claim 1, further comprising a base, wherein the tube is attached to the base, and the conductive portion of the heating element penetrates the base.

16. The heating structure according to claim 1, characterized in that the heating element is provided inside the tube and there is a gap between the heating element and the inner wall of the tube.

17. The tube includes a first sleeve and a second sleeve fitted over the outer circumference of the first sleeve. There is a gap between the first sleeve and the second sleeve, and this gap forms a cavity for housing the heating element. The heating structure according to claim 11, characterized in that the heating element is provided at intervals around the outer circumference of the first sleeve, and a heating cavity for heating the aerosol-forming matrix is ​​formed inside the first sleeve.

18. The heating structure according to claim 17, characterized in that the inner wall of the second sleeve is provided with a reflective layer that reflects infrared light waves.

19. The heating structure according to claim 17, characterized in that the distance between the plurality of first wire grooves and the first sleeve is equal to the distance between the plurality of second wire grooves and the first sleeve, and the distance between the plurality of third wire grooves and the first sleeve is greater than or less than the distance between the plurality of fourth wire grooves and the first sleeve.

20. The heating structure according to claim 17, characterized in that the distance between the plurality of first wire grooves and the first sleeve is less than the distance between the plurality of second wire grooves and the first sleeve, and the distance between the plurality of third wire grooves and the first sleeve is greater than or less than the distance between the plurality of fourth wire grooves and the first sleeve.

21. The heating structure according to claim 17, characterized in that the distance between the plurality of first wire grooves and the first sleeve is greater than the distance between the plurality of second wire grooves and the first sleeve, and the distance between the plurality of third wire grooves and the first sleeve is greater than or less than the distance between the plurality of fourth wire grooves and the first sleeve.

22. Aerosol generator, An aerosol generating device characterized by including the heat-generating structure described in any one of claims 1 to 21.

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