Aerosol generator and its heat generating 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 particularly to an aerosol generating device and its heat generating structure. [Background technology]

[0002] In the related art, an aerosol generator is an electronic device that heats an aerosol-forming matrix (e.g., a solid matrix, such as a plant leaf product like tobacco) rather than burning it. Aerosol generators typically use centrally or peripherally heated heating elements, typically by energizing the heating element to generate heat, which is then transferred directly to the aerosol-forming matrix via thermal conduction. The aerosol-forming matrix is ​​typically atomized at temperatures below 350°C. A drawback of this heating method is that because the heating element transfers heat to the aerosol-forming matrix directly or indirectly through a solid material, the operating temperature of the heating element must not be too high; otherwise, excessive combustion of the medium will occur, negatively impacting the smoking experience of the e-cigarette.

[0003] Furthermore, due to the low temperature of the heating element, the aerosol generator requires a long preheat time before a puff can be produced. Currently, the preheat time for most commercially available products is 15 seconds or more, which significantly impacts the consumer experience. Furthermore, the operating temperature of the heating element exceeds 400°C, which can lead to excessive combustion of the aerosol-forming matrix, adversely affecting the smoking experience. Therefore, rationalizing the design of the heating structure for high-temperature operating conditions is an urgent issue that must be resolved in this field. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem that the present invention aims to solve is to provide an improved aerosol generating device and its heat generating structure. [Means for solving the problem]

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: a heat-generating structure, comprising: a heat-generating element capable of emitting infrared light waves when energized; and a tube associated with the heat-generating element and transparent to the infrared light waves, wherein the heat-generating element and a tube wall of the tube are at least partially spaced apart, the heat-generating element comprises a heat-generating part and a conductive part, the heat-generating part comprises at least two heat-generating sections arranged at a distance from each other, and the heat-generating sections are electrically connected to the conductive part.

[0006] In some embodiments, the heat generating structure further comprises a frame, the frame being attached to the tube, and the at least one heat generating section being attached to the frame.

[0007] In some embodiments, the frame includes a first frame, a second frame, a third frame, and a fourth frame, the at least two heat generating sections include a first heat generating section and a second heat generating section connected to the first heat generating section, the first frame and the second frame are each spaced apart from the first heat generating section, and the third frame and the fourth frame are each spaced apart from the second heat generating section.

[0008] In some embodiments, the heat generating portion is arranged in a longitudinal direction, the at least two heat generating sections include a first heat generating section and a second heat generating section connected to the first heat generating section, and the first heat generating section and / or the second heat generating 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 equal to or greater than the length of the second heating section.

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

[0011] In some embodiments, the multiple 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 multiple M-shaped or N-shaped sections of the first heating section on the frame is less than or higher than the distribution density of the multiple M-shaped or N-shaped sections of the second heating section on 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 equal to 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 equal to 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 equal to 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 peripheral edge of the first frame, the second frame includes second wire grooves corresponding to the plurality of first wire grooves, the heat generating portion is wound around the plurality of first wire grooves and the plurality of second wire grooves in an M-shape or an N-shape, the third frame includes a plurality of third wire grooves provided on the outer peripheral edge of the third frame, the fourth frame includes fourth wire grooves corresponding to the plurality of third wire grooves, and the heat generating portion is wound around the plurality of third wire grooves and the plurality of fourth wire grooves in an M-shape or an N-shape.

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

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

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

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

[0020] In some embodiments, the heat generating structure further includes a base, the tube being attached to the base, and the conductive portion of the heating element passing through the base.

[0021] In some embodiments, the heating element is disposed inside the tube, with 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 disposed over the first sleeve; a gap is provided between the first sleeve and the second sleeve, the gap being a receiving cavity for receiving the heating element; The heating elements are spaced apart from each other on the outer periphery of the first sleeve, and a heating cavity is formed inside the first sleeve for heating the aerosol-forming matrix.

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

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

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

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

[0027] The present invention also provides an aerosol generating device including any of the heat-generating structures described 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 the infrared light waves can penetrate the tube to reach and heat the aerosol-forming matrix. When the maximum operating temperature of the heating element reaches 1000°C or higher (the operating temperature of a conventional HNB heating element is usually 400°C or lower), the aerosol-forming matrix will not burn excessively, significantly improving the smoking experience and significantly shortening the pre-heating time, greatly improving the consumer experience.

[0029] The heating part includes at least two spaced apart heating sections, which can provide gradual heating to suit various aerosol-forming matrices, rationally arrange the temperature field distribution, avoid burning of parts of the matrix, and further improve the smoking experience. [Brief explanation of the drawings]

[0030] The present invention will now be further described with reference to the following drawings and examples. [Figure 1] 1 is a schematic perspective structural diagram of an aerosol generating device according to some embodiments of the present invention. [Figure 2] FIG. 2 is a cross-sectional schematic view of the heat generating structure of the aerosol generating device shown in FIG. [Figure 3] FIG. 3 is a schematic diagram of the heat generating structure shown in FIG. 2 in a disassembled state. [Figure 4] 2 is a schematic perspective view of the heating element shown in FIG. 1 wound in an M-shape around first and second frames and third and fourth frames having different radial dimensions. [Figure 5] FIG. 4 is a schematic cross-sectional view of a heat generating structure according to another embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram of the heat generating structure shown in FIG. 5 in a disassembled state. DETAILED DESCRIPTION OF THE INVENTION

[0031] In order to make the technical features, objects and effects of the present invention more clearly understandable, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0032] In the description of the present invention, the orientations or positional relationships indicated by terms such as "longitudinal," "axial," "length," "width," "upper," "lower," "top," "bottom," "inner," and "outer" are based on the orientations shown in the drawings or the orientations or positional relationships that are always assumed when the product of the present invention is in use, and are intended to facilitate and simplify the description of the present invention. They do not indicate or imply that the device or element must have a specific orientation, or be configured or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are for descriptive purposes only and cannot be understood to indicate or imply relative importance or the number of technical features depicted. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include at least one of that feature. In describing the present invention, "plurality" means at least two sections, e.g., two sections, three, etc., unless otherwise expressly specified.

[0034] In the present invention, unless otherwise expressly defined and limited, the terms "attach," "connect," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral unit. They may also refer to a mechanical connection or an electrical connection. Unless otherwise expressly defined, they may refer to a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art depending on the circumstances.

[0035] FIG. 1 shows an aerosol-generating device 1 according to some embodiments of the present invention, and an aerosol-forming matrix 2 removably attached to one end of the aerosol-generating device 1. In some embodiments, the aerosol-generating device 1 may be prismatic so that it can be easily held by a user. The aerosol-forming matrix 2 inserted therein is baked and heated at a low temperature to release the aerosol extract contained in the aerosol-forming matrix 2 in a non-combustion state, and the aerosol-generating device 1 has good atomization stability and an excellent mouthfeel. In some embodiments, the aerosol-forming matrix 2 may be cylindrical or may be a strand- or sheet-shaped solid material made from plant leaves and / or stems, and an aromatic component may be added to the solid material. It should be understood that the aerosol-generating device 1 is not limited to a prismatic shape, and in other embodiments, it may have other shapes, such as a cylindrical or elliptical cylindrical shape.

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

[0037] 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 arranged in an M- or N-shape between the first frame 13, the second frame 14, the third frame 15, and the fourth frame 16, and the heating element 12 is arranged within the tube 11 together with the first frame 13, the second frame 14, 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 transmit light waves to reach the aerosol-forming matrix 2. Specifically, in this embodiment, the tube 11 transmits infrared light waves, facilitating heating of the aerosol-forming matrix 2 by infrared light wave radiation from the heating element 12. Specifically, there is a gap between the heating element 12 and the tube 11. When energized, the heating element 12 rapidly heats up to 1000-1300°C within 1-3 seconds, the surface temperature of the tube 11 may be controlled to 350°C or lower, and the atomization temperature of the entire aerosol-forming matrix 2 is controlled to 300-350°C, thereby enabling the aerosol-forming matrix 2 to be accurately atomized in the wavelength range of 2-5 μm. Specifically, the heating element 12 includes a heating part 121 that emits infrared light waves when energized and two conductive parts 122. The heating part 121 includes two heating sections, a first heating section 1211 and a second heating section 1212 connected to the first heating section 1211. The first heating section 1211 includes a first end 1201 and a second end 1202 opposite the first end 1201. The second heat generating section 1212 includes a third end 1203 connected to the second end 1202 and a fourth end 1204 opposite the third end 1203. The two conductive parts 122 are each connected to the fourth end 1204 of the second heat generating 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 around the first frame 13 and the second frame 14 in an M-shape or an N-shape, and the second heating section 1212 is wound around the third frame 15 and the fourth frame 16 in an M-shape or an N-shape. 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 fix the heating element 12. It should be understood that the number of heating sections is not limited to two and may be two or more to heat the aerosol-forming matrix 2 in stages in accordance with various aerosol-forming matrices 2. In some embodiments, the heating structure 10 may further include support rods (not shown), which connect the first frame 13 and the second frame 14, and the third frame 15 and the fourth frame 16 to each other and are inserted into the base 17 to fix 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. As can be appreciated, in other embodiments, the first frame 13, the second frame 14, the third frame 15, and the fourth frame 16 may be fixed to the inner surface of the tube 11 by direct adhesion, clinging, thermal melting, etc. The maximum operating temperature of the heating element 12 is 500°C to 1300°C, which is far higher than the 400°C of the prior art, thereby avoiding problems such as burning and uneven mouthfeel in high-temperature operating environments and significantly shortening the preheating time.

[0038] In some embodiments, the tube 11 may be hollow. Specifically, the tube 11 includes a tubular body 111 that is circular in cross section and a tip structure 112 provided at one end of the tubular body 111. Of course, it is understood that in other embodiments, the cross section of the tubular body 111 is not limited to a circular shape. The tubular body 111 has 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. The opening may be located within the base 17. The tip structure 112 is located at an end of the tubular body 111 that is remote from the opening. The provision of the tip structure 112 makes it easier for at least a portion of the heat-generating structure 10 to be inserted into and removed from the aerosol-forming matrix 2. In this embodiment, a first cavity 113 is formed inside the tube 11. The first cavity 113 is a cylindrical hollow and may be non-sealed. The first cavity 113 does not require vacuum suction or inert gas filling when the heating element 12 is installed inside. It is understood that in some other embodiments, the heating element 12 may be spaced apart from the outer periphery of the tube 11, and a second cavity for containing the aerosol-forming matrix 2 may be formed inside the tube 11. In this embodiment, a gap is formed between the inner wall of the tube 11 and the heating element 12, and the gap is filled with air or vacuum. The gap prevents 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 evenly spaced around 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 around the outer periphery of the second frame 14 that correspond 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 around 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 around the outer periphery of the fourth frame 16 that correspond to the plurality of third wire grooves 151. The first heat generating section 1211 is wound around the first wire grooves 131 and the second wire grooves 141, so that the first heat generating section 1211 is wound around the first wire grooves 131 and the second wire grooves 141 in an M- or N-shape. The second heat generating section 1212 is wound around the third wire grooves 151 and the fourth wire grooves 161, so that the second heat generating section 1212 is wound around the third wire grooves 151 and the fourth wire grooves 161 in an M- or N-shape. This gives the heat generating portion 121 a hollow configuration as a whole, avoiding the risk of electrical conduction at the center of the heat generating element 12 and the phenomenon of localized underheating of the heat generating element 12. Furthermore, there is no risk of the heat generating portion at the center being blocked by the heat generating portion at the periphery. This improves the heat utilization efficiency of the heat generating element 12. It can be understood that the first heating section 1211 can be wound in other shapes around the plurality of first wire grooves 131 and the plurality of second wire grooves 141, and in this case, the second heating section 1212 can also be wound in other shapes around the plurality of third wire grooves 151 and the plurality of fourth wire grooves 161. It can be understood that the first frame 13, the second frame 14, the third frame 15, and the fourth frame 16 are not limited to being circular, but can be other shapes such as a rectangular ring, and are also not limited to being circular, but can 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 to provide gradual 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 formed by winding or bending a long or wire-like heating wire, and the distribution density of the plurality of M-shaped or N-shaped sections of the first heating section 1211 on the first frame 13 and the second frame 14 is equal to or higher than the distribution density of the plurality of M-shaped or N-shaped sections of the second heating section 1212 on the third frame 15 and the fourth frame 16. This allows for various external temperature fields to be obtained to accommodate various aerosol-forming 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 of the spacing between the tube 11 and the plurality of first wire grooves 131 and the plurality of second wire grooves 141, and multiple configurations of the spacing between the tube 11 and the plurality of third wire grooves 151 and the plurality of fourth wire grooves 161. By adjusting the spacing between the tube 11 and the plurality of first wire grooves 131 and the plurality of second wire grooves 141 and / or the spacing between the tube 11 and the plurality of third wire grooves 151 and the plurality of fourth wire grooves 161, it is possible to adjust the gap between the tube 11 and the heating element 12 and further prevent the heating element 12 from contacting the tube 11 and becoming too hot locally on the heating element 12. Furthermore, adjusting the gap can adjust the temperature difference between the surface of the tube 11 and the surface of the heating element 12, thereby preventing the aerosol-forming matrix 2 from burning. In some embodiments, when the spacing between the plurality of first wire grooves 131 and the tube 11 is equal to the spacing between the plurality of second wire grooves 141 and the tube 11, the spacing between the plurality of third wire grooves 151 and the tube 11 may be greater than or less than the spacing between the plurality of fourth wire grooves 161 and the tube 11. When the spacing between the plurality of first wire grooves 131 and the tube 11 is less than the spacing between the plurality of second wire grooves 141 and the tube 11, the spacing between the plurality of third wire grooves 151 and the tube 11 may be greater than or less than the spacing between the plurality of fourth wire grooves 161 and the tube 11. When the spacing between the plurality of first wire grooves 131 and the tube 11 is greater than the spacing between the plurality of second wire grooves 141 and the tube 11, the spacing between the plurality of third wire grooves 151 and the tube 11 may be greater than or less than the spacing between the plurality of fourth wire grooves 161 and the tube 11.

[0043] Furthermore, as shown in FIG. 4 , in some embodiments, the first frame 13 and the second frame 14 have multiple radial dimensions, and the third frame 15 and the fourth frame 16 have multiple radial dimensions. 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 gap between the upper and lower ends of the heating element 12 and the tube 11 can be varied, 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, when 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 can be equal to or greater than the radial dimension of the fourth frame 16. When 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 can be equal to or greater than the radial dimension of the fourth frame 16. When the radial dimension of the first frame 13 is larger than the radial dimension of the second frame 14, the radial dimension of the third frame 15 may be equal to or smaller than the radial dimension of the fourth frame 16 or may be larger than it.

[0044] The heating element 12 includes a heating portion and a conductive portion. The heating portion includes at least two spaced apart heating sections. The two heating sections may be electrically connected by a heating base, such as a straight section of the heating base, or by other conductive materials. Alternatively, the two heating sections may generate heat independently, i.e., the two heating sections may not be electrically connected. The two heating sections are controlled to generate heat independently or simultaneously according to specific needs. The heating portion may also include three or more spaced apart heating sections. The connection method for each heating section is described above. For example, using a heating wire, the at least two heating sections may be formed by winding a single heating wire together, and the heating sections are electrically connected by straight sections of the heating wire of a predetermined length. Alternatively, each heating section may be wound with a separate heating wire, and the heating sections may be electrically connected by a resistive material, so that the heating sections are connected in series, or the heating sections may not be electrically connected but individually connected to a conductive part, so that multiple heating sections are arranged in parallel. The above arrangement can reliably achieve gradual heating, rationally distribute the temperature field, and further improve the smoking experience.

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

[0046] In this embodiment, the heat generating substrate can be wound or bent into a cylindrical shape. Specifically, the heat generating substrate can be a heating wire. Of course, it is understood that in some other embodiments, the heat generating substrate is not limited to a cylindrical shape and can be a sheet shape, i.e., the heat generating substrate can be a heat generating sheet. The heat generating substrate includes a metal substrate having high-temperature oxidation resistance, and the metal substrate can be a metal wire. Specifically, the heat generating substrate can be a metal material having properties such as good high-temperature oxidation resistance, 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 heat generating substrate can be 0.15 mm to 0.8 mm.

[0047] In this embodiment, the heating element 12 further includes an anti-oxidation layer formed between the heating base and the infrared emitting layer. Specifically, the anti-oxidation layer may be an oxide film, and the heating base is subjected to high-temperature heat treatment to form a dense oxide film on its surface. It is understood that in some other embodiments, the anti-oxidation layer is not limited to an oxide film formed on the heating base itself, but may also be an anti-oxidation coating applied to the outer surface of the heating base. The formation of the anti-oxidation layer ensures that the heating base is not oxidized or is hardly oxidized when heated in an air environment, improving the stability of the heating base. This eliminates the need for vacuum suction, filling of an inert gas or reducing gas into the first containing cavity 113, 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 anti-oxidation layer may be 1 μm to 150 μm. If the thickness of the antioxidant layer is less than 1 μm, the heat generating substrate is easily oxidized, and if the thickness of the antioxidant layer is more than 150 μm, the heat conduction between the heat generating substrate and the infrared emitting layer is affected.

[0048] In this embodiment, the infrared emitting 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 on an infrared-layer-forming substrate. In this embodiment, the infrared-layer-forming substrate may be a substrate made of silicon carbide, spinel, or a composite thereof. Of course, it is understood that in some other embodiments, the infrared emitting layer is not limited to an infrared layer. In some other embodiments, the infrared emitting 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 dip coating, spray coating, brush coating, or other methods. The thickness of the infrared emitting layer may be 10 μm to 300 μm. When the thickness of the infrared emitting layer is 10 μm to 300 μm, the 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 understood that in some other embodiments, the thickness of the infrared emitting layer is not limited to 10 μm to 300 μm.

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

[0050] 5 and 6 show a second embodiment of the heat generating structure 10a of the present invention, which differs from the first embodiment mainly in the following points: In some embodiments, the heat generating 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 heat generating element 12a includes a heat generating portion 121a that generates heat radiation when energized and two conductive portions 122a. The heat generating portion 121a includes two heat generating sections, which are a first heat generating section 1211a and a second heat generating section 1211a. The first heat generating section 1211a includes a first end 1201a and a second end 1202a opposite 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 opposite the third end 1203a. The two conductive portions 122a are each connected to the fourth end 1204a. The first frame 13a and the second frame 14a are provided in parallel and spaced apart from each other at the first end 1201a and the second end 1202a, respectively, and the third frame 15a and the fourth frame 16a are provided in parallel and spaced apart from each other 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 an 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 an N-shape. It is understood that the number of heating sections is not limited to two and may be greater than two to heat the aerosol-forming matrix in stages according to various aerosol-forming matrices. In some embodiments, the heating structure may further include a support rod (not shown) for connecting the first frame 13a and the second frame 14a and the third frame 15a and the fourth frame 16a to each other. It is understood that 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 by one of direct adhesion, clinging, 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 periphery of the first sleeve 111a. The first sleeve 111a may have a hollow structure with both ends penetrated. The first sleeve 111a may be cylindrical, and its inner diameter may be slightly larger than the outer diameter of the aerosol-forming matrix. A gap may be provided between the first sleeve 111a and the second sleeve 112a, and this gap may form a cavity for fitting the heating element 12a. The axial length of the first sleeve 111a may be larger than the axial length of the second sleeve 112a. The second sleeve 112a may be fitted over the outer periphery of the first sleeve 111a. The second sleeve 112a may be cylindrical, and the radial dimension of the second sleeve 112a may be larger than the radial dimension of the first sleeve 111a. In some embodiments, the heating element 12a is wound around the outer periphery 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 containing cavity and the heating element 12a, thereby providing thermal insulation. A heating cavity for heating the aerosol-forming matrix is ​​formed inside the first sleeve 111a.

[0053] In some embodiments, the second sleeve 112a has a reflective layer on the inside thereof, which is used to reflect the heat generated by the heating element 12a and radiate it back to the aerosol-forming matrix, thereby increasing the efficiency of heating. It should be understood that 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 cylindrical shape, an elliptical cylindrical shape, etc.

[0054] In some embodiments, the second sleeve 112a further includes a securing structure, which is used to secure the heating element 12a.

[0055] In some embodiments, the first frame 13a may be annular and include a plurality of first wire grooves 131a evenly spaced around the outer periphery of the first frame 13a. In some embodiments, the second frame 14a may be annular and include a plurality of second wire grooves 141a evenly spaced around the outer periphery of the second frame 14a. In some embodiments, the third frame 15a may be annular and include a plurality of third wire grooves 151a evenly spaced around the outer periphery of the third frame 15a. In some embodiments, the fourth frame 16a may be annular and include a plurality of fourth wire grooves 161a evenly spaced around the outer periphery of the fourth frame 16a. The first heat generating section 1211a is wound around the first wire grooves 131a and the second wire grooves 141a, so that the first heat generating section 1211a is wound around the first wire grooves 131a and the second wire grooves 141a in an M- or N-shape. The second heat generating section 1212 is wound around the third wire grooves 151a and the fourth wire grooves 161, so that the second heat generating section 1212a is wound around the third wire grooves 151a and the fourth wire grooves 161a in an M- or N-shape. This gives the heat generating portion 121a a hollow configuration, avoiding the risk of electrical conduction at the center of the heat generating element 12a and the phenomenon of localized underheating of the heat generating element 12a. Furthermore, there is no risk of the heat generating portion at the center being blocked by the heat generating portion on the periphery. This improves the heat utilization efficiency of the heat generating element 12a. It can be understood that the first heat generating section 1211a can be wound in other shapes around the plurality of first wire grooves 131a and the plurality of second wire grooves 141a, and in this case, the second heat generating section 1212a can also be wound in other shapes around the plurality of third wire grooves 151a and the plurality of fourth wire grooves 161a. It can be understood that the first frame 13a, the second frame 14a, the third frame 15a, and the fourth frame 16a are not limited to being circular, but can be other shapes such as a rectangular ring, and are also not limited to being circular, but can be columnar, etc.

[0056] In some embodiments, there are multiple configurations of the spacing between the first sleeve 111a and the multiple first wire grooves 131a and the multiple second wire grooves 141a, and multiple configurations of the spacing between the first sleeve 111a and the multiple third wire grooves 151a and the multiple fourth wire grooves 161a. By adjusting the spacing between the first sleeve 111a and the multiple first wire grooves 131a and the multiple second wire grooves 141a and the first sleeve 111a and / or the spacing between the third wire grooves 151a and the 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 further, excessively high local temperatures of the heating element 12a due to contact between the heating element 12a and the first sleeve 111a can be prevented. Furthermore, adjusting the gap can adjust the temperature difference between the surface of the first sleeve 111a and the surface of the heating element 12a, thereby preventing the aerosol-forming matrix from burning. In some embodiments, when the spacing between the plurality of first wire grooves 131a and the first sleeve 111a is equal to the spacing between the plurality of second wire grooves 141a and the first sleeve 111a, the spacing between the plurality of third wire grooves 151a and the first sleeve 111a may be greater than or less than the spacing between the plurality of fourth wire grooves 161a and the first sleeve 111a. When the spacing between the plurality of first wire grooves 131a and the first sleeve 111a is less than the spacing between the plurality of second wire grooves 141a and the first sleeve 111a, the spacing between the plurality of third wire grooves 151a and the first sleeve 111a may be greater than or less than the spacing between the plurality of fourth wire grooves 161a and the first sleeve 111a. If the spacing between the multiple first wire grooves 131a and the first sleeve 111a is greater than the spacing between the multiple second wire grooves 141a and the first sleeve 111a, the spacing between the multiple third wire grooves 151a and the first sleeve 111a may be greater than or less than the spacing between the multiple fourth wire grooves 161a and the first sleeve 111a.

[0057] The above examples merely represent preferred embodiments of the present invention, and although the descriptions are relatively specific and detailed, it should be understood that this does not limit the scope of the present invention. Those skilled in the art can freely combine the above technical features and make slight 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, all conversions and modifications equivalent to the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A heat generating structure, A heating structure comprising: a heating element capable of emitting infrared light waves when energized; and a tube arranged in cooperation with the heating element and through which the infrared light waves are transmitted, wherein the heating element and a tube wall of the tube are arranged 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 arranged at a distance from each other; and the heating sections are electrically connected to the conductive portion.

2. The heat generating structure of claim 1 , further comprising a frame, the frame being attached to the tube, and the at least one heat generating section being attached to the frame.

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

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

5. The heat generating structure according to claim 4 , wherein the length of the first heat generating section is equal to or less than the length of the second heat generating section or is greater than the length of the second heat generating section.

6. The heat generating structure according to claim 4 , wherein the first heat generating section and the second heat generating section include a plurality of spaced apart M-shaped or N-shaped sections.

7. 7. The heating structure of claim 6, wherein 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 on the frame is equal to or lower than the distribution density of the plurality of M-shaped or N-shaped sections of the second heating section on the frame.

8. 4. The heat generating structure according to claim 3, wherein 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 equal to or less than the radial dimension of the second frame or greater than the radial dimension of the second frame.

9. 4. The heat generating structure according to claim 3, wherein 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. 4. The heat generating structure according to claim 3, wherein the radial dimension of the first frame is larger than the radial dimension of the second frame, and the radial dimension of the third frame is equal to or smaller than the radial dimension of the second frame.

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

12. 12. The heat generating structure of claim 11, wherein when the spacing between the plurality of first wire grooves and the tube is equal to the spacing between the plurality of second wire grooves and the tube, the spacing between the plurality of third wire grooves and the tube is greater than or less than the spacing between the plurality of fourth wire grooves and the tube.

13. 12. The heat generating structure of claim 11, wherein when the spacing between the plurality of first wire grooves and the tube is less than the spacing between the plurality of second wire grooves and the tube, the spacing between the plurality of third wire grooves and the tube is greater than or less than the spacing between the plurality of fourth wire grooves and the tube.

14. 14. The heat generating structure of claim 13, wherein when the spacing between the plurality of first wire grooves and the tube is greater than the spacing between the plurality of second wire grooves and the tube, the spacing between the plurality of third wire grooves and the tube is greater than or less than the spacing between the plurality of fourth wire grooves and the tube.

15. 2. The heat generating structure according to claim 1, wherein the heat generating portion includes a heat generating base that generates heat when energized, and an infrared radiation layer provided on the outer surface of the heat generating base for radiating the infrared light waves.

16. The heat generating structure according to claim 1 , further comprising a base, the tube being attached to the base, and the conductive portion of the heat generating element passing through the base.

17. The heat generating structure according to claim 1 , wherein the heat generating element is provided inside the tube, and a gap is formed between the heat generating element and the inner wall of the tube.

18. The tube includes a first sleeve and a second sleeve that is fitted over the outer periphery of the first sleeve, a gap is provided between the first sleeve and the second sleeve, the gap serving as a receiving cavity for receiving the heating element; The heating structure according to claim 11, wherein the heating element is provided at intervals on the outer periphery of the first sleeve, and a heating cavity for heating the aerosol-forming matrix is ​​formed inside the first sleeve.

19. 19. The heat generating structure according to claim 18, wherein the second sleeve has an inner wall provided with a reflective layer for reflecting infrared light waves.

20. 19. The heat generating structure of claim 18, wherein when the spacing between the plurality of first wire grooves and the first sleeve is equal to the spacing between the plurality of second wire grooves and the first sleeve, the spacing between the plurality of third wire grooves and the first sleeve is greater than or less than the spacing between the plurality of fourth wire grooves and the first sleeve.

21. 19. The heat generating structure of claim 18, wherein when the spacing between the plurality of first wire grooves and the first sleeve is less than the spacing between the plurality of second wire grooves and the first sleeve, the spacing between the plurality of third wire grooves and the first sleeve is greater than or less than the spacing between the plurality of fourth wire grooves and the first sleeve.

22. 19. The heat generating structure of claim 18, wherein when the spacing between the plurality of first wire grooves and the first sleeve is greater than the spacing between the plurality of second wire grooves and the first sleeve, the spacing between the plurality of third wire grooves and the first sleeve is greater than or less than the spacing between the plurality of fourth wire grooves and the first sleeve.

23. An aerosol generating device, comprising: An aerosol generating device, comprising the heat generating structure according to any one of claims 1 to 22.

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