Aerosol generator and heat generating structure

Abstract

The present invention relates to an aerosol generating device and a heat-generating structure. The heat-generating structure includes a sleeve and a heat-generating element at least partially spaced from the sleeve. The heat-generating element includes a heat-generating base that generates heat when energized and an infrared emitting layer disposed on the outer surface of the heat-generating base and used to radiate infrared light waves. The sleeve is used to transmit the infrared light waves. The heat-generating element is at least partially curved and has first and second free ends. The sleeve has two ends aligned along an axial direction, and the first and second free ends extend from the same end of the sleeve. Because the heat-generating element is at least partially curved and the first and second free ends of the heat-generating element extend from the same end of the sleeve, the assembly process of the heat-generating structure can be simplified and assembly costs can be reduced.

Description

[Technical Field]

[0001] The present invention relates to the technical field of thermal non-combustion atomization, and more particularly to aerosol generating devices and heat generating structures. [Background technology]

[0002] In the HNB (heat not burn) atomization region, heating methods such as central heating element heating or peripheral heating element heating are commonly used. In typical methods, the heating element is energized to generate heat, and the heat is transferred directly to the medium, such as the aerosol-forming substrate, via thermal conduction, resulting in atomization of the medium typically at temperatures below 350°C. Because these heating methods involve heat transfer to the medium, such as the aerosol-forming substrate, either directly or indirectly via a solid material, excessively high operating temperatures of the heating element can cause the medium to overheat, affecting the mouthfeel during inhalation.

[0003] In related art, there is a heat-generating structure that generates heat by generating infrared light waves, and the operating temperature of this heat-generating element can reach approximately 400°C. However, in such a heat-generating structure, the conductive material is introduced from the seat into the sleeve of the heat-generating structure and connected to the heat-generating element, making the assembly process complicated. Furthermore, there are currently no confirmed research examples of heat-generating element structures with a maximum operating temperature exceeding 400°C. Summary of the Invention [Problem to be solved by the invention]

[0004] It is an object of the present invention to provide an improved aerosol generating device and heat generating structure.

[0005] In a technical form for solving the technical problem, the present invention provides a heating structure comprising a sleeve and a heating element disposed at least partially spaced apart from the sleeve, the heating element including a heating base that generates heat when energized and an infrared radiation layer disposed on the outer surface of the heating base and used to radiate infrared light waves, the sleeve being used to transmit the infrared light waves, the heating element being disposed at least partially curved and having a first free end and a second free end, the sleeve having two ends arranged along an axial direction, the first free end and the second free end being drawn out from the same end of the sleeve.

[0006] In some embodiments, the heating element includes a plurality of spaced apart curved segments.

[0007] In some embodiments, the curved segments are equally spaced apart.

[0008] In some embodiments, a plurality of the curved segments are arranged in a dense to loose phase.

[0009] In some embodiments, the curved segments are arranged from "sparse" to "dense."

[0010] In some embodiments, the curved segments are arranged in a "dense" to "sparse" order.

[0011] In some embodiments, the curved segments are arranged in a sparse-dense-sparse configuration.

[0012] In some embodiments, the curved segments are arranged in a dense-sparse-dense configuration.

[0013] In some embodiments, the heating element includes a first heating portion and a second heating portion.

[0014] The first heat generating portion is wrapped around the outside of the second heat generating portion.

[0015] In some embodiments, the second heat generating portion is linear.

[0016] The first heat generating portion includes at least one curved segment.

[0017] In some embodiments, the first free end is attached to one end of the first heat generating portion and is used to form a conductive portion, and the second free end is attached to one end of the second heat generating portion and is used to form another conductive portion.

[0018] In some embodiments, the first heat generating portion and the second heat generating portion are separate structures.

[0019] In some embodiments, the first heat generating portion and the second heat generating portion are of a unitary structure.

[0020] In some embodiments, the first heat generating portion and the second heat generating portion are installed in an insulated manner, And / or, the first free end and the second free end are installed in an insulated manner.

[0021] In some embodiments, an insulating structure is installed on an outer wall of the first heat generating part and / or the second heat generating part.

[0022] In some embodiments, the insulating structure includes an air gap or an insulating layer applied to an outer surface of the first heat generating portion and / or the second heat generating portion.

[0023] In some embodiments, the insulating structure includes an oxide layer, and the oxide layer is heat-treated by a heat-generating base of the first heat-generating portion and / or the second heat-generating portion and formed on an outer surface of the oxide layer.

[0024] In some embodiments, the heating element has a diameter of 0.05 to 0.7 mm.

[0025] In some embodiments, the resistivity of the heating element is between 0.8 and 1.6 Ωmm 2 / m.

[0026] In some embodiments, the sleeve is hollow tubular and has a first accommodating chamber formed therein for accommodating the heating element, the heating element being spaced apart from the inner wall of the first accommodating chamber.

[0027] In some embodiments, the heating elements are spaced apart and positioned around the circumference of a sleeve, the sleeve being hollow and defining a second containment chamber for containing the aerosol medium.

[0028] In some embodiments, the sleeve includes a first tube for transmitting light waves and a second tube disposed around the first tube; A gap is provided between the second tube and the first tube, and the gap forms a first receiving chamber for receiving the heating element.

[0029] The heating element is provided on the outer periphery of the first tubular body and is spaced apart from the first tubular body.

[0030] In some embodiments, an opening is provided at one end of the sleeve, and the first free end and the second free end are each led out of the sleeve through the opening.

[0031] In some embodiments, the entire heating element is spaced apart from the wall of the sleeve.

[0032] In some embodiments, the heating element is positioned so that it does not come into direct contact with the sleeve.

[0033] In some embodiments, the sleeve has a wall thickness of 0.15 mm to 0.6 mm.

[0034] In some embodiments, the distance between the tube wall of the sleeve and the heating element is 0.05 mm to 1 mm.

[0035] The present invention further comprises an aerosol generating device comprising the heat generating structure described in the present invention.

[0036] The implementation of the aerosol generating device and the heat generating structure of the present invention has the following beneficial effects: The heat generating structure has at least a portion of the heat generating element curved, and the first free end and the second free end of the heat generating element are drawn out from the same end of the sleeve, which simplifies the assembly process of the heat generating structure and saves assembly costs.

[0037] Furthermore, the heating base of the heating element generates heat when energized, which excites the infrared emitting layer and emits infrared light waves. The infrared light waves then pass through the sleeve and reach the aerosol-forming medium, heating it. This allows the maximum operating temperature of the heating element to reach 500°C or higher, even 1000°C or higher (the maximum operating temperature of conventional HNB heating elements is generally about 400°C), without overheating the aerosol-forming medium. This significantly improves the mouthfeel during inhalation and significantly shortens preheating time, significantly improving the user experience. The maximum operating temperature of the heating element of the present invention is 500°C to 1300°C, far exceeding the maximum operating temperature of heating elements of the prior art. [Brief explanation of the drawings]

[0038] The present invention will now be further described with reference to the accompanying drawings and examples. [Figure 1] 1 is a configuration diagram of an aerosol generating device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing the heat generation configuration of the aerosol generating device shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view of the heat generating structure shown in FIG. [Figure 4] FIG. 3 is an exploded view of the heat generating structure shown in FIG. 2. [Figure 5] FIG. 5 is a diagram illustrating the configuration of a heat generating element of the heat generating structure shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view of the heating element shown in FIG. 5. [Figure 7] FIG. 4 is a cross-sectional view of a heating element of an aerosol generating device according to a second embodiment of the present invention. [Figure 8] FIG. 10 is a cross-sectional view of a heating element of an aerosol generating device according to a third embodiment of the present invention. [Figure 9] FIG. 10 is a diagram showing the configuration of the heat generating structure of the aerosol generating device according to the fourth embodiment of the present invention. [Figure 10] 10 is a schematic diagram of the heat generating structure shown in FIG. 9 from another perspective. [Figure 11] FIG. 10 is a cross-sectional view of the heat generating structure shown in FIG. [Figure 12] FIG. 10 is an exploded view of the heat generating structure shown in FIG. [Figure 13] FIG. 10 is a diagram showing the configuration of a heat generating unit of an aerosol generating device according to a fifth embodiment of the present invention. [Figure 14] FIG. 10 is a diagram showing the configuration of a heat generating part of an aerosol generating device according to a sixth embodiment of the present invention. [Figure 15] FIG. 10 is a diagram showing the configuration of a heat generating unit of an aerosol generating device according to a seventh embodiment of the present invention. [Figure 16] FIG. 13 is a configuration diagram of a heat generating unit of a generator according to an eighth embodiment of the present invention. [Figure 17] FIG. 13 is a diagram showing the configuration of a heat generating unit of an aerosol generating device according to a ninth embodiment of the present invention. [Figure 18] FIG. 16 is a diagram showing the configuration of a heating element of an aerosol generating device according to a tenth embodiment of the present invention. [Figure 19] FIG. 20 is a diagram showing the configuration of a heating element of an aerosol generating device according to an eleventh embodiment of the present invention. [Figure 20] FIG. 22 is a diagram showing the configuration of a heating element of an aerosol generating device according to a twelfth embodiment of the present invention. [Figure 21] FIG. 21 is an exploded view of the heating element shown in FIG. 20. [Figure 22] FIG. 22 is a diagram showing the configuration of a heating element of an aerosol generating device according to a thirteenth embodiment of the present invention. [Figure 23] FIG. 22 is a cross-sectional view of the heat generating structure of the aerosol generating device according to the fourteenth embodiment of the present invention. [Figure 24] FIG. 24 is an exploded view of the heat generating structure of the aerosol generating device shown in FIG. 23. [Figure 25] FIG. 20 is a cross-sectional view of the heat generating structure of the aerosol generating device according to the fifteenth embodiment of the present invention. [Figure 26] FIG. 26 is an exploded view of the heat generating structure of the aerosol generating device shown in FIG. 25. DETAILED DESCRIPTION OF THE INVENTION

[0039] 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 with reference to the accompanying drawings.

[0040] 1 shows a first embodiment of the aerosol-generating device of the present invention. The aerosol-generating device 100 is capable of heating an aerosol-forming substrate 200 by a low-temperature heating, non-combustion method, resulting in excellent atomization stability and a smooth mouthfeel after atomization. In some embodiments, the aerosol-forming substrate 200 is cylindrical and detachably attached to the aerosol-generating device 100. Specifically, the aerosol-forming substrate 200 is a thread- or sheet-like solid material made from plant leaves and / or stems, and aromatic components can be further added to the solid material.

[0041] As shown in FIGS. 2 and 3 , in this embodiment, the aerosol generating device 100 includes a heat generating structure 11 and a power supply assembly 20. The heat generating structure 11 is partially insertable into the aerosol-forming substrate 200, specifically, into a medium segment of the aerosol-forming substrate 200. When energized, it generates infrared light waves to heat and atomize the medium segment of the aerosol-forming substrate 200, thereby generating an aerosol. The heat generating structure 11 has advantages such as a simple structure, high atomization efficiency, high stability, and long life. The power supply assembly 20 is used to supply power to the heat generating structure 11. Specifically, in some embodiments, the heat generating structure 11 is detachably attached to the housing of the power supply assembly 20 and can be mechanically and / or electrically connected to a power source within the power supply assembly 20. Removably attaching the heat generating structure 11 to the housing of the power supply assembly 20 facilitates replacement of the heat generating structure 11.

[0042] 3 and 4 , in this embodiment, the heating structure 11 includes a sleeve 111, a heating element 112, and a seat 113. The sleeve 111 covers at least a portion of the heating element 112 and can be used to transmit light waves to the aerosol-forming substrate 200. Specifically, in this embodiment, the sleeve 111 is capable of transmitting infrared light waves, which facilitates the heating element 112 to radiate heat for heating the aerosol-forming substrate 200. The heating element 112 is also spaced apart from the tubular wall of the sleeve 111. The seat 113 is located at the opening 1110 of the sleeve 111 and is used to fix the tubular body or seal the opening 1110 of the sleeve 111. The maximum operating temperature of the heating element of the present invention is 500°C to 1300°C, which is significantly higher than the maximum operating temperature of heating elements in the prior art. This significantly improves the mouthfeel during inhalation and significantly shortens the preheating time.

[0043] In this embodiment, the sleeve 111 is a quartz glass tube. Of course, it should be understood that in some other embodiments, the sleeve 111 is not limited to a quartz tube, but may be other window materials that can transmit light waves, such as infrared-transmitting glass, transparent ceramic, diamond, etc.

[0044] In this embodiment, the sleeve 111 is hollow and tubular, having two ends aligned along the axial direction. Specifically, the sleeve 111 includes a tubular body 1111 having a circular cross section and a tip structure 1112 disposed at one end of the tubular body 1111. Of course, it should be understood that in some other embodiments, the cross section of the tubular body 1111 is not limited to a circular shape. The tubular body 1111 is a hollow structure having an opening 1110 at one end. The tip structure 1112 is disposed at one end of the tubular body 1111 away from the opening 1110. By disposing the tip structure 1112, at least a portion of the heat-generating structure 111 can be easily attached to and detached from the aerosol-forming substrate 200. In this embodiment, a cylindrical first containing chamber 1113 is formed inside the sleeve 111. In some other embodiments, the heating elements 112 may be spaced apart around the outer periphery of the sleeve 111, and a second storage chamber for storing the aerosol-forming substrate 200 may be formed inside the sleeve 111.

[0045] In this embodiment, the tube wall of the sleeve 111 is spaced apart from the entire heating element 112, and an air gap 1114 that can be filled with air is provided between the inner wall of the sleeve 111 and the heating element 112. Of course, it should be understood that in some other embodiments, the air gap 1114 may be filled with a reducing gas or an inert gas. By providing the air gap 1114, the sleeve 111 and the heating element 112 are not in direct contact with each other. In some embodiments, the heating element 112 may be spaced apart from a portion of the tube wall of the sleeve 111. Specifically, the radial dimension of some segments of the heating portion 1120 may be larger than the radial dimension of other segments, and the radial dimension of some segments of the heating portion 1120 may be equal to the inner diameter of the sleeve 111, thereby serving as a position limiter. Of course, it should be understood that in some embodiments, the inner surface of the sleeve 111 may locally protrude toward the heating element 112 and contact the heating element 112 to serve as a positional limiter. Of course, in some other embodiments, an isolation positioning structure may be installed on the heating element 112 or the tube wall of the sleeve 111 to prevent direct contact between the heating element 112 and the tube wall of the sleeve 111, for example, by covering some segments of the heating element 112 with a ceramic ring. Note that the above-mentioned air gap may refer to a gap through which air can flow, and does not necessarily mean that air or other gases are present; a vacuum state is also a form of air gap.

[0046] By adjusting the thickness of the tube wall and the distance between the heating element 112 and the tube wall, the heating temperature of the aerosol-forming substrate 200 by the entire heat-generating structure 11 can be adjusted. Under the same temperature conditions, the overall irradiance tends to decrease as the thickness of the tube wall increases. Optionally, in some embodiments, the thickness of the tube wall of the sleeve 111 is 0.15 mm to 0.6 mm. In some embodiments, the temperature of the heat-generating structure 11 tends to gradually decrease as the distance between the heating element 112 and the tube wall increases. Preferably, in some embodiments, the distance between the tube wall of the sleeve 111 and the heating element 12 is 0.05 mm to 1 mm.

[0047] As shown in FIGS. 5 and 6 , in this embodiment, the heating element 112 is a single, vertically elongated heating element having a first free end 112d and a second free end 112e, which extend from the same end of the sleeve 111. In this embodiment, the heating element 112 is rod-shaped with a circular cross section. At least a portion of the heating element 112 is curved to form a columnar heating portion 1120. Specifically, the heating element 112 can be curved to form a single-spiral columnar heating portion 1120. It should be understood that in other embodiments, the heating element 112 is not limited to a rod shape and can be a vertical sheet or mesh-like shape. The heating portion 1120 is not limited to a columnar shape and can be a sheet, rod, or mesh-like shape. In other embodiments, the heating element 112 can be wound in a double-spiral structure, an M-shaped structure, an N-shaped structure, or other shapes. Of course, it should be understood that in some other embodiments, the heating element 112 is not limited to one, but may be two or more. When there are two heating elements 112, the two heating elements 112 have one end connected to each other and the other end (the unconnected end) is a free end. That is, the free ends of the two heating elements 112 are the first free end 112d and the second free end 112e, respectively. The shape of the heating element 112 is not limited to a cylindrical shape, and in some embodiments, the heating element 112 may be a sheet shape.

[0048] In this embodiment, a conductive part 1121 is installed at one end of the heating part 1120, and the conductive part 1121 is connected to the heating part 1120, drawn out from one end of the sleeve 111, and penetrates the seat part 113 to be conductively connected to the power supply assembly 20. Two conductive parts 1121 are provided, and the two conductive parts 1121 are installed at a distance from each other, and are respectively connected to the heating part 1120, and are installed so as to be drawn out through the sleeve 111 from one end of the sleeve 111 where the opening 1110 is provided. In this embodiment, the first free end 112d and the second free end 112e of the heating element 112 each form two conductive portions 1121. That is, the first free end 112d of the first heating portion 112a forms one conductive portion 1121, and the second free end 112e of the second heating portion 112b forms the other conductive portion 1121, and the heating portion 1120 is integrally molded with the conductive portions 1121. Of course, it should be understood that in some other embodiments, the conductive portions 1121 may be fixed to the first free end 112d and the second free end 112e by welding and may be integrally formed with the heating portion 1120. The conductive portion 1121 may be a lead wire welded to the heating portion 1120. Of course, it should be understood that in some other embodiments, the conductive portion 1121 is not limited to a lead wire and may have other conductive structures. By drawing out the first free end 112d and the second free end 112e (i.e., the two conductive portions 1121) from the same end of the sleeve 111, the assembly of the entire heat generating structure 11 can be facilitated and the assembly process can be simplified; during assembly, the heat generating structure 11 only needs to be attached to the support seat so that it contacts the electrode located on the support seat.

[0049] In this embodiment, the heating element 112 includes a heating base 1122 and an infrared emitting layer 1124. The heating base 1122 is capable of generating heat when energized. The infrared emitting layer 1124 is disposed on the outer surface of the heating base 1122. When energized and heated, the heating base 1122 excites the infrared emitting layer 1124, which can generate and emit infrared light waves. In this embodiment, the heating base 1122 and the infrared emitting layer 1124 are concentrically arranged in the cross section of the heating part 1120.

[0050] In this embodiment, the entire heating base 1122 is cylindrical, and specifically, may be a heating wire. Of course, it should be understood that in some embodiments, the heating base 1122 is not limited to a cylindrical shape and may be sheet-shaped. That is, the heating base 1122 may be an electric heating sheet. The heating base 1122 includes a metal substrate having high-temperature oxidation resistance, and the metal substrate may be a metal wire. Specifically, the heating base 1122 is a metal material having excellent 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 heating base 1122 is 0.15 mm to 0.8 mm.

[0051] In this embodiment, the heating element 112 further includes an anti-oxidation layer 1123 formed between the heating base 1122 and the infrared emitting layer 1124. Specifically, the anti-oxidation layer 1123 is a dense oxide film formed on the surface of the heating base 1122 after high-temperature heat treatment. Of course, in some other embodiments, the anti-oxidation layer 1123 is not limited to an oxide film formed on the heating base 1122 itself, but may be an anti-oxidation coating applied to the outer surface of the heating base 1122. The formation of the anti-oxidation layer 1123 ensures that the heating base 1122 is not or hardly oxidized during heating in an air environment, improving the stability of the heating base 1122. This eliminates the need for evacuation, filling with an inert gas, or filling with a reducing gas in the first containing chamber 1113, simplifying the overall assembly process of the heating structure 11 and reducing manufacturing costs. In this embodiment, the thickness of the anti-oxidation layer 1123 can be selected from a range of 1 μm to 150 μm. If the thickness of the anti-oxidation layer 1123 is less than 1 μm, the heat generating base 1122 is easily oxidized. If the thickness of the anti-oxidation layer 1123 exceeds 150 μm, the heat conduction between the heat generating base 1122 and the infrared emitting layer 1124 is affected.

[0052] In this embodiment, the infrared emitting layer 1124 is an infrared layer. The infrared layer is formed on the side of the antioxidant layer 1123 that faces away from the heat-generating base 1122 by high-temperature heat treatment of an infrared-layer-forming substrate. In this embodiment, the infrared-layer-forming substrate is a silicon carbide, spinel, or a composite substrate thereof. Of course, in some other embodiments, the infrared emitting layer 1124 is not limited to an infrared layer. In some other embodiments, the infrared emitting layer 1124 may be a composite infrared layer. In this embodiment, the infrared layer is formed on the side of the antioxidant layer 1123 that faces away from the heat-generating base 1122 by means of dip coating, spray coating, brush coating, or the like. The thickness of the infrared emitting layer 1124 is 10 μm to 300 μm. When the thickness of the infrared emitting layer 1124 is 10 μm to 300 μm, the effect of infrared light waves is good, and the aerosol-forming substrate 200 has good atomization efficiency and a good mouthfeel after atomization. Of course, it should be understood that in some other embodiments, the thickness of the infrared emitting layer 1124 is not limited to 10 um to 300 um.

[0053] In this embodiment, the heat generating unit 1120 includes a first heat generating unit 112a and a second heat generating unit 112b. The first heat generating unit 112a and the second heat generating unit 112b are connected at one end, the first free end 112d is located at the end of the first heat generating unit 112a that is not connected to the second heat generating unit 112b, and the second free end 112e is connected to the end of the second heat generating unit 112b that is not connected to the first heat generating unit 112a. In this embodiment, the first heat generating unit 112a and the second heat generating unit 112b are integrally molded and can be formed by bending a single heat generating element 112. It should be understood that in some other embodiments, the first heat generating unit 112a and the second heat generating unit 112b may be separate structures, and each of the first heat generating unit 112a and the second heat generating unit 112b may be two heat generating elements 112. It should be understood that in some other embodiments, the second heat generating portion 112b may be omitted and a non-heat generating conductive rod may be used instead.

[0054] In this embodiment, the heating portion 1120 is formed by a single spiral winding. Specifically, the second heating portion 112b is linear, and the first heating portion 112a is wound around the second heating portion 112b along the circumferential and axial directions of the second heating portion 112b, with the second heating portion 112b as a central rod. The heating portion 1120 includes multiple curved segments 112c, i.e., the first heating portion 112a includes multiple curved segments 111c. Of course, it should be understood that the number of curved segments 111c is not limited to multiple, and may be one. In this embodiment, the multiple curved segments 112c are spaced apart and arranged at equal intervals in the axial direction of the second heating portion 112b. Of course, it should be understood that in some other embodiments, the multiple curved segments 112c are not limited to being arranged at equal intervals. In this embodiment, for heating elements made of the same material and with a uniform diameter, adjusting the distance between the curved segments 112c makes it possible to control the temperature field distribution throughout the heating unit 1120. That is, adjusting the helical pitch makes it possible to control the temperature field distribution throughout the heating unit 1120, improve heating stability, and improve the uniformity of atomization of the aerosol-forming substrate. Note that the temperature field distribution throughout the heating unit 1120 is related to the density of the multiple curved segments 112c, and a winding method in which the curved segments 112c are wound with different densities can be selected according to the temperature field distribution requirements and combustion state during the heating process of the entire aerosol-forming substrate.

[0055] Typically, the smaller the helical pitch, the greater the amount of heat generated per unit length, resulting in a higher temperature and stronger infrared radiation. However, because the heat dissipation area at both ends is larger than that at the center, the temperature at the same helical pitch is lower. Therefore, to achieve overall temperature uniformity, the helical pitch at both ends must be smaller and the helical pitch at the center must be larger. However, the atomization effect of the aerosol-forming substrate 200 is not necessarily optimal in a uniform temperature field, and the effects of airflow and other factors must also be considered. Therefore, temperature field control can be achieved by installing different helical structures.

[0056] Of course, it should be understood that in some other embodiments, the entire temperature field distribution can be controlled by controlling the resistance. The resistance can be controlled by selecting the material or controlling different diameters of the heating element 112, that is, the heating element 112 can be selected from a suitable material and with a suitable diameter as needed. In this embodiment, the resistivity of the resistor is 0.8-1.6 Ωmm. 2 / m. Alternatively, the diameter of the heating element 112 may be 0.05 to 0.7 mm.

[0057] In this embodiment, an insulating structure is provided on the entire outer wall of the heating element 112, i.e., the outer walls of the first heating portion 112a and the second heating portion 112b are provided with an insulating structure. Of course, it should be understood that the insulating structure may be provided only on the outer wall of the first heating portion 112a or the outer wall of the second heating portion 112b. By providing the insulating structure, the first heating portion 112a and the second heating portion 112b can be insulated from each other. In this embodiment, the insulating structure is an air gap, which is formed by vaporizing an insulating coating provided between the first heating portion 112a and the second heating portion 112b. In this embodiment, the insulating coating is applied to the outer surfaces of the first heating portion 112a and the second heating portion 112b. However, in some other embodiments, the insulating coating may be applied only to the outer surface of the first heating portion 112a or the outer surface of the second heating portion 112b. It should be understood that in some other embodiments, the insulating structure may be applied only to an insulating layer on the outer surface of the first heating portion 112a and / or the second heating portion 112b, and there is no need to vaporize the insulating layer.

[0058] In some embodiments, the insulating coating can be vaporized by high temperature, forming an air gap between the first heating portion 112a and the second heating portion 112b, thereby achieving insulation. In this embodiment, the insulating coating is Teflon (registered trademark). Specifically, Teflon is applied to the entire outer surface of the heating element 112 and tightly wound in a spiral, resulting in a Teflon coating of two wall thicknesses between the first heating portion 112a and the second heating portion 112b. After the heating portion 1120 is wound in a predetermined direction, the Teflon can be vaporized by high temperature, forming an air gap between the first heating portion 112a and the second heating portion 112b, thereby achieving air gap insulation.

[0059] It should be understood that in some other embodiments, the insulating structure is not limited to an insulating coating and may be an insulating sleeve. The insulating sleeve can be provided around the outer periphery of the second heat-generating portion 112b to prevent local conduction or dielectric breakdown due to direct contact between the second heat-generating portion 112b and the first heat-generating portion 112a. Of course, it should be understood that the insulating sleeve may also be provided around the outer periphery of the first heat-generating portion 112a. The insulating sleeve may be a microceramic tube, a glass tube, or other high-temperature insulating material.

[0060] In some embodiments, the oxide layer 1123 formed on the outer surface of the heating base 1122 of the first heating part 112a and the second heating part 112b by heat treatment can enhance the insulation between the first heating part 112a and the second heating part 112b and protect the heating base 1122. That is, the insulating structure may include the oxide layer 1123.

[0061] 7 shows a second embodiment of the aerosol generator of the present invention. The second embodiment is distinguished from the first embodiment in that the infrared emitting layer 1124 is a composite infrared layer formed by combining an infrared-layer-forming substrate with a binder for bonding the antioxidant layer 1123. Specifically, the binder is glass powder, and the composite infrared layer is a composite layer of glass powder and an infrared layer. The reason for using glass powder is that the glass powder melts at high temperatures, bonding the antioxidant layer 1123 to the infrared-layer-forming substrate and sealing gaps in the infrared-layer-forming substrate, thereby further improving the ability to prevent dielectric breakdown.

[0062] 8 shows a third embodiment of the aerosol generating device of the present invention. The third embodiment is distinguished from the first embodiment in that the heating element 112 further includes a bonding layer 1125 disposed between the anti-oxidation layer 1123 and the infrared emitting layer 1124. The bonding layer 1125 can be used to prevent localized dielectric breakdown of the heating base 1122 and further improve the bonding strength between the anti-oxidation layer 1123 and the infrared emitting layer 1124. In some embodiments, the binder in the bonding layer 1125 is glass powder, i.e., the bonding layer 1125 is a glass powder layer.

[0063] 9 to 12 show a fourth embodiment of the aerosol-generating device of the present invention. The fourth embodiment is different from the first embodiment in that the heat-generating structure 11 is not limited to a configuration in which it is partially inserted into the aerosol-forming substrate 200 for heating. In this embodiment, the heat-generating structure 11 is disposed around the outer periphery of the medium segment of the aerosol-forming substrate 200 and heats the aerosol-forming matrix within the aerosol-forming substrate 200 by a peripheral heating method. In this embodiment, the second heat-generating portion 112b can be omitted.

[0064] In this embodiment, the sleeve 111 includes a first tube 111a and a second tube 111b. The first tube 111a has a hollow structure with both ends penetrated. The first tube 111a is cylindrical with an inner diameter slightly larger than the outer diameter of the aerosol-forming substrate 200. A second containing chamber 1115 for heating the medium segment of the aerosol-forming substrate 200 is formed inside the first tube 111a. The axial length of the first tube 111a is larger than the axial length of the second tube 111b. The second tube 111b has a cylindrical shape and a radial dimension larger than that of the first tube 111a, and can be fitted around the outer periphery of the first tube 111a, i.e., a gap is provided between the second tube 111b and the first tube 111a to form a first receiving chamber 1113 for receiving the heating element 112. In some embodiments, the heating element 112 is wound around the outer periphery of the first tube 111a, and an air gap 1114 is provided between the heating element 112 and the inner wall of the second tube 111b and the outer wall of the first tube 111a, thereby creating a certain temperature difference between the inner wall of the first receiving chamber 1113 and the heating element 112, thereby providing thermal insulation. In some embodiments, the inner wall of the second tube 111b is provided with a reflective layer for reflecting the heat of the heating element 112 and radiating it to the aerosol-forming substrate 200 so as to increase the efficiency of heating energy.

[0065] In some other embodiments, the heating element 112 is not limited to a configuration in which it is entirely spaced apart from the first tube 111a or the second tube 111b. In some other embodiments, the heating element 112 may be partially spaced apart from the first tube 111a, and the radial dimension of some segments of the heating portion 1120 may be set to be equal to the outer diameter of the first tube 111a, thereby serving as a positional limiter. In some embodiments, the heating element 112 may be partially spaced apart from the second tube 111b, and the radial dimension of some segments of the heating portion 1120 may be set to be equal to the radial dimension of the second tube 111b.

[0066] FIG. 13 shows a fifth embodiment of the aerosol generating device of the present invention, which is different from the first embodiment in that the plurality of curved segments 112c are arranged in a dense and sparse pattern.

[0067] FIG. 14 shows a sixth embodiment of the aerosol generating device of the present invention, which is different from the first embodiment in that the curved segments 112c are arranged from "sparse" to "dense."

[0068] FIG. 15 shows a seventh embodiment of the aerosol generating device of the present invention, which is different from the first embodiment in that the curved segments 112c are arranged from "dense" to "sparse."

[0069] FIG. 16 shows an eighth embodiment of the aerosol generating device of the present invention, which is different from the first embodiment in that the plurality of curved segments 112c are arranged in a "sparse"-"dense"-"sparse" configuration.

[0070] FIG. 17 shows a ninth embodiment of the aerosol generating device of the present invention, which is different from the first embodiment in that the plurality of curved segments 112c are arranged in a "dense"-"sparse"-"dense" configuration.

[0071] 18 shows a tenth embodiment of the aerosol generating device of the present invention, which is distinguished from the first embodiment in that the first heating portion 112a and the second heating portion 112b are separate structures. The first heating portion 112a and the second heating portion 112b are each two separate heating elements 112. Of course, it should be understood that the second heating portion 112b may be replaced with a non-heat-generating conductive rod.

[0072] Figure 19 shows an eleventh embodiment of the aerosol generating device of the present invention, which is distinguished from the first embodiment in that the first heating portion 112a and the second heating portion 112b of the heating element 112 are wound around a heating portion 1120 having a double spiral structure by a double spiral winding method.

[0073] 20 and 21 show a twelfth embodiment of the aerosol generating device of the present invention, which is different from the first embodiment in that the heating element 112 is wound around the heating part 1120 using an M-winding method. Specifically, the heating structure 11 includes two spaced-apart winding stands 114, and the heating element 112 is wound around the two winding stands 114. The two winding stands 114 have the same structure and radial dimensions, so that the overall dimensions of the heating part 1120 in the radial direction of the winding stands 114 are uniformly distributed along the axial direction of the heating part 1120. In this embodiment, the heating structure 11 further includes a support rod 115 installed between the two winding stands 114 and providing support.

[0074] Figure 22 shows a thirteenth embodiment of the aerosol generating device of the present invention, which is distinguished from the second embodiment in that the radial dimension of one winding stand 114 is smaller than the radial dimension of the other winding stand 114, so that the entire heat generating part 1120 has a conical shape, and the conductive part 1121 is pulled out from the winding stand 114 with a larger radial dimension.

[0075] 23 and 24 show a fourteenth embodiment of the aerosol generator of the present invention, which is different from the fourth embodiment in that the heating element 112 forms the heating part 1120 by a double spiral winding method.

[0076] 25 and 26 show a fifteenth embodiment of the aerosol generator of the present invention, which is different from the fourteenth embodiment in that the heating element 112 forms a heating portion 1120 by the M-winding method.

[0077] The above embodiments merely represent preferred embodiments of the present invention in more detail and should not be understood as limiting the scope of the claims of the present invention. Those skilled in the art may freely combine the above technical features and add some modifications and improvements without departing from the spirit of the present invention, and all of these fall within the scope of protection of the present invention. Therefore, all modifications and improvements equivalent to the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. A heat generating structure, A heating structure comprising a sleeve (111) and a heating element (112) arranged at least partially spaced apart from the sleeve (111), the heating element (112) comprising a heating base (1122) that generates heat when electrically connected, and an infrared radiation layer (1124) arranged on the outer surface of the heating base (1122) and used to radiate infrared light waves, the sleeve (111) being used to transmit the infrared light waves, the heating element (112) being arranged at least partially curved and having a first free end (112d) and a second free end (112e), the sleeve (111) having two ends arranged along an axial direction, the first free end (112d) and the second free end (112e) being drawn out from the same end of the sleeve (111).

2. The heating structure of claim 1, wherein the heating element (112) includes a plurality of spaced apart curved segments (112c).

3. The heat generating structure according to claim 2, wherein the curved segments (112c) are arranged at equal intervals.

4. The heat generating structure according to claim 2, wherein the plurality of curved segments (112c) are arranged in a dense-spaced arrangement.

5. The heat generating structure according to claim 2, wherein the plurality of curved segments (112c) are arranged in a "sparse" to "dense" arrangement.

6. The heat generating structure according to claim 2, wherein the plurality of curved segments (112c) are arranged in a "dense" to "sparse" arrangement.

7. The heat generating structure according to claim 2, wherein the plurality of curved segments (112c) are arranged in a "sparse"-"dense"-"sparse" arrangement.

8. The heat generating structure according to claim 2, wherein the plurality of curved segments (112c) are arranged in a "dense"-"sparse"-"dense" arrangement.

9. The heating element (112) includes a first heating portion (112a) and a second heating portion (112b), The heating structure according to claim 1, wherein the first heating portion (112a) is wrapped around the outside of the second heating portion (112b).

10. The second heat generating portion (112b) is linear, The heating structure of claim 9, wherein the first heating portion (112a) includes at least one curved segment (112c).

11. The heating structure of claim 9, wherein the first free end (112d) is located at one end of the first heating portion (112a) and is used to form a conductive portion (1121), and the second free end (112e) is located at one end of the second heating portion (112b) and is used to form another conductive portion (1121).

12. The heat generating structure according to claim 9, wherein the first heat generating portion (112a) and the second heat generating portion (112b) are separate structures.

13. The heat generating structure according to claim 9, wherein the first heat generating portion (112a) and the second heat generating portion (112b) are of an integral structure.

14. The first heat generating portion (112a) and the second heat generating portion (112b) are installed in an insulated manner, The heat generating structure according to claim 9, further characterized in that the first free end (112d) and the second free end (112e) are installed in an insulated manner.

15. The heat generating structure according to claim 9, wherein an insulating structure is installed on an outer wall of the first heat generating portion (112a) and / or the second heat generating portion (112b).

16. The heat generating structure according to claim 15, characterized in that the insulating structure comprises an air gap or an insulating layer applied to the outer surface of the first heat generating portion (112a) and / or the second heat generating portion (112b).

17. The heat generating structure of claim 15, wherein the insulating structure includes an oxide layer (1123), the oxide layer (1123) being formed on the outer surface of the insulating structure by heat treatment with the heat generating base (1122) of the first heat generating portion (112a) and / or the second heat generating portion (112b).

18. The heating structure according to claim 1, wherein the diameter of the heating element (112) is 0.05 to 0.7 mm.

19. The resistivity of the heating element (112) is 0.8 to 1.6 Ωmm ２ The heat generating structure according to claim 1 , wherein the heat generating structure is 0.1 / m.

20. The heating structure of claim 1, wherein the sleeve (111) is hollow and has a first accommodating chamber (1113) formed therein for accommodating the heating element (112), and the heating element (112) is installed at a distance from the inner wall of the first accommodating chamber (1113).

21. The heating structure of claim 1, wherein the heating element (112) is spaced apart from the outer periphery of a sleeve (111), the sleeve (111) being hollow inside and forming a second containing chamber (1115) for containing an aerosol medium.

22. The sleeve (111) includes a first tubular body (111a) for transmitting light waves and a second tubular body (111b) that is wrapped around the outer periphery of the first tubular body (111a), a gap is provided between the second tubular body (111b) and the first tubular body (111a), and the gap forms a first receiving chamber (1113) for receiving the heating element (112); The heat generating structure according to claim 1, wherein the heat generating element (112) is provided on the outer periphery of the first tube (111a) and is spaced apart from the first tube (111a).

23. The heat-generating structure of claim 1, characterized in that an opening (1110) is provided at one end of the sleeve (111), and the first free end (112d) and the second free end (112e) are each pulled out to the outside of the sleeve (111) through the opening (1110).

24. The heating structure according to claim 1, wherein the entire heating element (112) is spaced apart from the tube wall of the sleeve (111).

25. The heating structure according to claim 1, wherein the heating element (112) is installed so as not to come into direct contact with the sleeve (111).

26. 2. The heat generating structure according to claim 1, wherein the thickness of the tube wall of the sleeve (111) is 0.15 mm to 0.6 mm.

27. The heating structure according to claim 1, wherein the distance between the tube wall of the sleeve (111) and the heating element (12) is 0.05 mm to 1 mm.

28. An aerosol generating device, comprising the heat generating structure according to any one of claims 1 to 27.

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