Aerosol Generating Device and Heating Assembly

Abstract

The present invention relates to an aerosol generator and a heating assembly. The heating assembly includes a heating unit that generates infrared waves when energized and a sleeve tube through which the infrared waves pass. The heating unit includes a heating base, an antioxidant layer on the outer surface of the heating base to prevent oxidation of the heating base, and an infrared emitting layer on the side of the antioxidant layer away from the heating base. A non-hermetically sealed cavity is formed within the sleeve tube to accommodate the heating unit. The provision of the antioxidant layer on the outer surface of the heating base of the heating unit prevents oxidation of the heating base, allowing the sleeve tube to have a non-hermetically sealed cavity for accommodating the heating unit. This eliminates the need to seal the sleeve tube, evacuate it, or fill it with an inert gas, simplifying the assembly process and reducing manufacturing costs.

Description

[Technical Field]

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

[0002] In the field of HNB (heat-not-burn) atomization, heating methods such as central heating or peripheral heating are commonly used. Typically, the heating element generates heat, which is then transferred directly to a medium, such as an aerosol-forming substrate, via thermal conduction. The medium is typically atomized at temperatures below 350°C. A drawback of this heating method is that the heating element transfers heat to the medium, such as an aerosol-forming substrate, either directly or indirectly via a solid material. Therefore, it is important that the operating temperature of the heating element not be too high. If the temperature is too high, the medium may over-combust or the solid material may produce an unpleasant odor, which may affect the mouthfeel of the e-cigarette.

[0003] Related technologies include heat-generating assemblies that generate heat by generating thermal radiation, and the operating temperature of the heating element can reach approximately 400°C. However, when the heating element operates at high temperatures, oxidation occurs in the substrate, causing a significant change in the resistance of the heating element and affecting the heating stability. To solve the oxidation problem, the sealed mounting space is typically evacuated or filled with an inert gas, but this process is complicated and requires high manufacturing costs. Summary of the Invention

[0004] The present invention aims to provide an improved heat generating assembly and, further, to provide an improved aerosol generating device.

[0005] The technical solution adopted by the present invention to solve the technical problem is to configure a heating assembly as follows: The heating assembly includes a heating part that generates infrared waves when energized, and a sleeve tube through which the infrared waves pass. The heat generating portion includes a heat generating base, an antioxidant layer provided on the outer surface of the heat generating base to prevent oxidation of the heat generating base, and an infrared radiation layer provided on the side of the antioxidant layer away from the heat generating base. A non-hermetically sealed accommodation cavity for accommodating the heat generating portion is formed within the sleeve tube, and at least a portion of the heat generating portion is disposed at a distance from the wall of the sleeve tube.

[0006] In some embodiments, the anti-oxidation layer includes an oxide film, and the oxide film is formed on an outer surface of the heat-generating base.

[0007] In some embodiments, the thickness of the antioxidant layer is between 1 um and 150 um.

[0008] In some embodiments, an air gap remains between the inner wall of the receiving cavity and the heat generating portion.

[0009] In some embodiments, the sleeve comprises a hollow tubular body; The receiving cavity is formed within the tubular body; An opening is provided at one end of the tubular body.

[0010] In some embodiments, two conductive portions are connected to the heat generating portion, and both of the conductive portions pass through the opening.

[0011] In some embodiments, the sleeve includes a pointed structure, the pointed structure being located at an end of the tubular body remote from the opening.

[0012] In some embodiments, there are two conductive portions, and the two conductive portions are spaced apart. The heat generating assembly further includes an insulating member that is at least partially provided within the sleeve tube and that insulates the two conductive portions.

[0013] In some embodiments, the heating element further includes a support supporting the heating element and the sleeve, the sleeve being at least partially inserted into the support.

[0014] In some embodiments, the support base is provided with a conductive member connected to the conductive portion.

[0015] In some embodiments, the support base includes a bracket that supports the sleeve tube and a sealing member. The sealing member is fitted onto a segment of the sleeve pipe and seals a gap between the inner wall of the bracket and the outer wall of the sleeve pipe.

[0016] In some embodiments, the sealing member has a hollow structure with both ends penetrated, and a passage is formed inside the sealing member for the sleeve tube to pass through.

[0017] In some embodiments, the sealing member includes a sleeve body having both ends penetrating therethrough and adapted to be fitted onto a portion of the sleeve tube, and a first sealing portion protruding from an outer wall of the sleeve body, The first sealing portion is lockingly connected to and fixed to the bracket.

[0018] In some embodiments, the support base includes an outer casing fitted onto the outer periphery of the bracket and having a sleeve connection port that cooperates with the bracket. The bracket includes a bottom wall, and a gap remains between the sleeve connection port and the bottom wall.

[0019] In some embodiments, the housing is removably fitted to the bracket, The outer casing is provided with a through hole through which a part of the heat generating structure passes.

[0020] In some embodiments, the sealing member further includes a sleeve body having both ends penetrating therethrough and fitted onto a portion of the sleeve tube, and a second sealing portion protruding from an outer wall of the sleeve body. The second sealing portion is located between the bracket and the outer casing when the outer casing and the bracket are assembled, and is used to seal a gap formed between the bracket and an end face of the through hole.

[0021] In some embodiments, the sleeve is infrared transparent glass, transparent ceramic, or diamond.

[0022] In some embodiments, the entire heating element is spaced apart from the wall of the sleeve tube.

[0023] In some embodiments, the heating element is positioned so that it does not come into direct contact with the sleeve.

[0024] In some embodiments, the infrared emitting layer includes an infrared layer and / or a composite infrared layer, and the composite infrared layer is formed by combining an infrared layer-forming substrate and a binder for bonding to the antioxidant layer.

[0025] In some embodiments, the heat generating substrate comprises a metal substrate, and the metal substrate comprises a nickel-chromium alloy substrate or an iron-chromium-aluminum alloy substrate.

[0026] The present invention further comprises an aerosol generating device comprising a heat generating assembly according to the present invention.

[0027] The implementation of the aerosol generating device and heat generating assembly according to the present invention has the following beneficial effects: Since the heat generating assembly can prevent oxidation of the heat generating base by providing an antioxidant layer on the outer surface of the heat generating part's heat generating base, the receiving cavity for receiving the heat generating part in the sleeve tube can be provided non-hermetically, i.e., there is no need to seal the sleeve tube, evacuate it, or fill it with an inert gas, and the space inside the tube can communicate with the atmosphere outside the device, which simplifies the assembly process of the heat generating assembly and reduces manufacturing costs.

[0028] Furthermore, by providing an infrared emitting layer on the outer surface of the heating base, when the heating base generates heat while being energized, the heat can excite the infrared emitting layer to emit infrared waves. The infrared waves can then pass through the sleeve tube to reach the aerosol-forming substrate and heat it. When the maximum operating temperature of the heating element reaches 1000°C or higher (the operating temperature of conventional HNB heating elements generally does not exceed 400°C), the aerosol-forming medium does not overburn, thereby significantly improving the smoking experience. At the same time, the preheating time is significantly reduced under high-temperature operating conditions, significantly improving the consumer experience. [Brief explanation of the drawings]

[0029] The invention will now be further described with reference to the accompanying drawings and examples. [Figure 1] 1 is a schematic exploded view of the structure of an aerosol generating device according to a first embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a structural schematic diagram of a heat generating assembly of the aerosol generating device shown in FIG. 1. [Figure 3] 3 is a first longitudinal cross-sectional view of the heat generating assembly shown in FIG. 2. [Figure 4] 3 is a second longitudinal cross-sectional view of the heat generating assembly shown in FIG. 2. [Figure 5] 3 is a third longitudinal cross-sectional view of the heat generating assembly shown in FIG. 2. [Figure 6] FIG. 3 is an exploded structural schematic diagram of the heat generating assembly shown in FIG. 2. [Figure 7]FIG. 3 is a schematic diagram of the bottom structure of the heat generating assembly shown in FIG. 2. [Figure 8] FIG. 7 is a cross-sectional view of the heating element of the heating assembly shown in FIG. 6. [Figure 9] FIG. 10 is a cross-sectional view of a heating element of an aerosol generating device according to a second embodiment of the present invention. [Figure 10] 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. DETAILED DESCRIPTION OF THE INVENTION

[0030] 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 drawings.

[0031] 1 shows a first embodiment of the aerosol-generating device of the present invention. The aerosol-generating device 100 can heat an aerosol-forming substrate using a low-temperature heating, non-combustion method, and provides stable atomization and a pleasant atomized taste. In some embodiments, the aerosol-forming substrate may be removably inserted into the aerosol-generating device 100. The aerosol-forming substrate may be cylindrical. Specifically, the aerosol-forming substrate may be a thread- or sheet-like solid material made of plant leaves and / or stems, and an aromatic component may be further added to the solid material.

[0032] As shown in FIGS. 1 and 2 , in this embodiment, the aerosol generating device 100 further includes a heat generating assembly 10 and a power supply assembly 20. The power supply assembly 20 includes a power supply case 21. The heat generating assembly is housed in the power supply case 21 and may be partially inserted into the aerosol-forming substrate. Specifically, a portion of the heat generating assembly is inserted into the medium segment of the aerosol-forming substrate. When energized, the heat generating assembly 10 generates infrared radiation to heat the medium segment of the aerosol-forming substrate and atomize it to generate aerosol. The heat generating assembly 10 has advantages such as easy assembly, simple structure, high atomization efficiency, high stability, and long service life. The power supply assembly 20 is mechanically and / or electrically connected to the heat generating assembly 10 and is used to supply power to the heat generating assembly 10.

[0033] In this embodiment, the heat-generating assembly 10 includes a heat-generating structure 11 and a support base 12. The heat-generating structure 11 is mounted on the support base 12. In this embodiment, the heat-generating structure 11 and the support base 12 are detachably mounted, which facilitates replacement and maintenance of the heat-generating structure 11. The support base 12 can be mechanically and electrically connected to the heat-generating structure 11 and not only supports the heat-generating structure 11, but also is conductively connected to the heat-generating structure 11 when the heat-generating structure 11 is mounted thereon, thereby electrically connecting the heat-generating structure 11 and the power supply assembly 20. In other embodiments, the support base 12 may only serve as a support.

[0034] As shown in FIGS. 3 to 5 , in this embodiment, the heating structure 11 includes a sleeve tube 111 and a heating element 112. The sleeve tube 111 is at least partially inserted into the support 12 and covers at least a portion of the heating element 112, allowing light waves to pass through and reach the aerosol-forming substrate. Specifically, in this embodiment, the sleeve tube 111 allows infrared waves to pass through, thereby facilitating the heating element 112 radiating heat to heat the aerosol-forming substrate. Specifically, in this embodiment, the entire heating element 112 is spaced apart from the tube wall of the sleeve tube 111, leaving an air gap between the inner wall of the sleeve tube 111 and the heating element 112. When energized, the heating element rapidly heats up to 1000 to 1300°C in 1 to 3 seconds, while the surface temperature of the sleeve tube 111 can be controlled to 350°C or less. The atomization temperature of the entire aerosol-forming substrate is controlled at 300-350°C, and the aerosol-forming substrate is precisely atomized mainly in the wavelength range of 2-5 μm. The maximum operating temperature of the heating element of the present invention is 500-1300°C, which is much higher than the maximum operating temperature of heating elements in the prior art.

[0035] In this embodiment, the sleeve tube 111 may be a quartz glass tube. Of course, it can be understood that in some other embodiments, the sleeve tube 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.

[0036] As shown in FIGS. 6 to 8 , in this embodiment, the sleeve tube 111 is hollow. Specifically, the sleeve tube 111 includes a tubular body 1111 having a circular cross section and a pointed structure 1112 provided at one end of the tubular body 1111. Of course, it can 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 pointed structure 1112 is provided at one end of the tubular body 1111 away from the opening 1110. The pointed structure 1112 facilitates insertion and removal of at least a portion of the heat-generating structure 111 into and from the aerosol-forming substrate. In this embodiment, a receiving cavity 1113 is formed inside the sleeve tube 111. The receiving cavity 1113 is a cylindrical cavity and can be arranged in a non-sealed manner. The air in the accommodating cavity 1113 can be communicated with the atmosphere outside the device. Once the heating element 112 is attached thereto, the accommodating cavity 1113 does not need to be evacuated or filled with an inert gas. In this embodiment, the sleeve tube 111 further includes a positioning portion 1114. The positioning portion 1114 is disposed at the opening 1110 of the tubular body 111 and extends radially outward from the tubular body 111 to form a positioning flange for positioning the attachment of the sleeve tube 111 to the support base 12. In this embodiment, the positioning portion 1114 may be integrally formed with the tubular body 111. It should be understood that in some other embodiments, the positioning portion 1114 may be detachably assembled to the sleeve tube 111, for example, by sleeve connection, screwing, or fastening. In this embodiment, an air gap remains between the inner wall of the sleeve tube 111 and the heating element 112, and the air gap can be filled with air. By leaving an air gap, direct contact between the sleeve tube 111 and the heating element 112 can be prevented.

[0037] In this embodiment, the heating element 112 may be a single piece, or may be disposed vertically and wound to form a spiral heating portion 1120 as a whole. Specifically, the heating element 112 may be cylindrical as a whole and wound to form a single spiral structure, a double spiral structure, an M-shaped structure, an N-shaped structure, or other shaped structure. Of course, in some other embodiments, the heating element 112 is not limited to a single piece, but may be two pieces, or there may be more than two heating elements 112, and the shape of the heating elements 112 is not limited to a cylindrical shape, and in some embodiments, the shape of the heating element 112 may be a sheet shape.

[0038] In this embodiment, the heating element 1120 is disposed within the sleeve tube 111 and is spaced apart from the inner wall of the sleeve tube 111. When energized, the heating element 1120 generates infrared radiation, i.e., infrared waves. The infrared waves can pass through the sleeve tube 111 and reach the aerosol-forming substrate. In this embodiment, the heating element 1120 may have a vertically elongated spiral shape. Of course, it can be understood that in some other embodiments, the heating element 1120 is not limited to a spiral shape.

[0039] In this embodiment, a conductive part 1121 is provided at one end of the heating part 1120. The conductive part 1121 is connected to the heating part 1120, drawn out from the opening 1110 of the sleeve tube 111, and may be conductively connected to the power supply assembly 20 by passing through the base 113. In this embodiment, the conductive part 1121 may be fixed to the heating part 1120 by welding to form an integral structure. It should be understood that in some other embodiments, the heating part 1120 may be integrally formed with the conductive part 1121. In this embodiment, there may be two conductive parts 1121. The two conductive parts 1121 are spaced apart and connected to both ends of the heating part 1120, respectively, and may both extend to the same end and be disposed through the opening 1110 at one end of the sleeve tube 111. In this embodiment, the conductive part 1121 may be a lead wire and may be welded to the heating part 1120. Of course, it can be understood that in some other embodiments, the conductive portion 1121 is not limited to a lead wire and may be another conductive structure. By arranging the conductive portion 1121 at one end of the heat generating portion 1120 and extending it from the sleeve tube 111, it is possible to facilitate assembly of the entire heat generating structure 11 and simplify the assembly process. During assembly, the heat generating structure 11 is mounted on the support base 12 and then brought into contact with the conductive member 124 located on the support base 12.

[0040] In this embodiment, the heating element 112 forming the heating section 1120 includes a heating base 1122 and an infrared radiation layer 1124. The heating base 1122 is capable of generating heat when electrically connected. The infrared radiation layer 1124 is disposed on the outer surface of the heating base 1122 and is excited by heating the heating base 1122 to emit infrared waves. In this embodiment, the heating base 1122 and the infrared radiation layer 1124 are distributed concentrically in the cross section of the heating section 1120.

[0041] In this embodiment, the heating base 1122 may have a cylindrical shape as a whole. Specifically, the heating base 1122 may be a heating wire. Of course, in some other embodiments, the heating base 1122 is not limited to a cylindrical shape and may have a sheet shape, i.e., the heating base 1122 may be a heating sheet. The heating base 1122 includes a metal base having high-temperature oxidation resistance. The metal base may be a metal wire. Specifically, the heating base 1122 may be a metal material having high-temperature oxidation resistance, high stability, and resistance to deformation, such as a nickel-chromium alloy base (e.g., nickel-chromium alloy wire) or an iron-chromium-aluminum alloy base (e.g., iron-chromium-aluminum alloy wire). In this embodiment, the radial dimension of the heating base 1122 may be 0.15 mm to 0.8 mm.

[0042] In this embodiment, the heating element 112 further includes an antioxidant layer 1123, which is formed between the heating base 1122 and the infrared emitting layer 1124. Specifically, the antioxidant layer 1123 may be an oxide film. The heating base 1122 undergoes high-temperature treatment to form a dense oxide film on its surface, which forms the antioxidant layer 1123. Of course, in some other embodiments, the antioxidant layer 1123 is not limited to including an oxide film formed by the heating base 1122 itself, and in some other embodiments, it may be an antioxidant coating applied to the outer surface of the heating base 1122. Forming the antioxidant layer 1123 ensures that the heating base 1122 is not oxidized or is hardly oxidized when heated in an air environment, thereby improving the stability of the heating base 1122. As a result, there is no need to evacuate the receiving cavity 1113 or fill it with an inert gas or reducing gas, and there is no need to block the opening 1110, simplifying the assembly process of the entire heat generating structure 11 and reducing manufacturing costs. In this embodiment, the thickness of the anti-oxidation layer 1123 can be selected in the range of 1 um to 150 um. If the thickness of the anti-oxidation layer 1123 is less than 1 um, the heat generating base 1122 is easily oxidized. If the thickness of the anti-oxidation layer 1123 is more than 150 um, it will affect the thermal conduction between the heat generating base 1122 and the infrared emitting layer 1124.

[0043] In this embodiment, the infrared emitting layer 1124 may be an infrared layer. The infrared layer may be formed on the side of the antioxidant layer 1123 away from the heat-generating substrate 1122 by high-temperature heat treatment of an infrared-layer-forming substrate. In this embodiment, the infrared-layer-forming substrate may be a silicon carbide, spinel, or a composite substrate thereof. It should be understood that in some other embodiments, the infrared emitting layer 1124 is not limited to an infrared layer. In other embodiments, the infrared emitting layer 1124 may be a composite infrared layer. In this embodiment, the infrared layer may be formed on the side of the antioxidant layer 1123 away from the heat-generating substrate 1122 by dip coating, spray coating, brush coating, or other methods. The infrared emitting layer 1124 may have a thickness of 10 μm to 300 μm. When the infrared emitting layer 1124 has a thickness of 10 μm to 300 μm, its improved thermal radiation effect improves the atomization efficiency of the aerosol-forming substrate and the mouthfeel of the atomization. Of course, it can be understood that in some other embodiments, the thickness of the infrared emitting layer 1124 is not limited to 10 um to 300 um.

[0044] In this embodiment, the heat generating assembly 11 further includes an insulating member 113. The insulating member 113 has a cylindrical shape, and its radial dimension may be smaller than that of the receiving cavity 1113. The insulating member 113 can be fully or partially inserted into the receiving cavity 1113 through the opening 1110 of the sleeve tube 111, thereby isolating the two conductive portions 1121, i.e., insulating the two conductive portions 1121. In this embodiment, the insulating member 113 has two perforations 1131. The two perforations 1131 correspond one-to-one to the two conductive portions 1121. The perforations 1131 extend along the axial direction of the insulating member 113 and are used for the conductive portions 1121 to pass through and be electrically connected to the support base 12. In some embodiments, the insulating member 113 does not have to be cylindrical. In some embodiments, the insulating member 113 may be an insulating partition plate, and the perforations 1131 may be omitted. In some embodiments, the insulating member 113 may be a ceramic body, a quartz tube, or other insulating structure.

[0045] 3 to 7, in this embodiment, the support 12 can support the sleeve tube 111 and the heat generating part 1120, and includes a bracket 121, an outer casing 122, and a sealing member 123. The bracket 121 is used to support the heat generating structure 11. The outer casing 122 may be fitted onto the outer periphery of the bracket 121. The sealing member 123 may be attached to the bracket 121 to hermetically connect the heat generating structure 11 to the bracket 121 and the housing 122.

[0046] In this embodiment, the bracket 121 includes a first bracket body 121a and a second bracket body 121b that are openable and closable. The openable and closable first bracket body 121a and the second bracket body 121b facilitate the attachment and detachment of the heat-generating structure 11. In some embodiments, the first bracket body 121a and the second bracket body 121b may be joined to form a rectangular parallelepiped structure. It should be understood that in other embodiments, the first bracket body 121a and the second bracket body 121b are not limited to a rectangular parallelepiped shape, and in other embodiments, the joint between the first bracket body 121a and the second bracket body 121b may be cylindrical or have other shapes.

[0047] In this embodiment, end plates 1210 are provided at one ends of the first bracket body 121a and the second bracket 121b, and partition plates 1212 are provided on both the first bracket body 121a and the second bracket 121b. The partition plates 1212 divide the bracket 121 into two spaces, an upper space and an lower space. The space adjacent to the end plate 1210 forms a locking groove 1211 that cooperates with the sealing member 123. The partition plate 1212 is provided with a semi-cylindrical first bypass hole 1216. The two partition plates 1212 of the first bracket 121a and the second bracket 121b are arranged opposite each other, and the first bypass holes 1216 are joined to form a first via hole through which the heat-generating structure 11 is drilled.

[0048] In this embodiment, the bracket 121 further includes a bottom wall 1213, which is disposed on the first bracket 121a. Of course, in other embodiments, the bottom wall 1213 is not limited to being disposed on the first bracket 121a, and may be disposed on the second bracket 121b.

[0049] In this embodiment, the support 12 is provided with an isolation member 1215. Specifically, the isolation member 1215 is disposed to protrude from the bottom wall 1213, is integrally formed with the bottom wall 1213, and may be a rib plate, and is used to isolate two adjacent conductive parts 1121 and to electrically insulate the two conductive parts 1121.

[0050] In this embodiment, the first bracket body 121a and the second bracket 121b include a position-limiting barrier plate 1216 that limits the position of the heat-generating structure 11. The position-limiting barrier plate 1216 is disposed below the partition plate 1212 and spaced apart from the partition plate 1212. The position-limiting barrier plate 1216 is provided with a semi-cylindrical second escape hole 1217. When the first bracket 121a and the second bracket 121b are joined, the two second escape holes 1217 in the two position-limiting barrier plates 1216 join to form a second via hole. The second via hole is used for passing the heat-generating structure 11. The radial dimension of the second via hole is smaller than the radial dimension of the positioning portion 1114 at one end of the sleeve tube 111, and therefore, it can position the heat-generating structure 11 in cooperation with the positioning portion 1114.

[0051] In this embodiment, the outer casing 122 is fitted onto the outer periphery of the bracket 121 after the heat-generating structure 11 and the bracket 121 are assembled, and serves to fix the first bracket body 121a and the second bracket 121b, allowing the heat-generating structure 11 and the support base 12 to form an integrated structure. In this embodiment, the shape and dimensions of the outer casing 122 are compatible with the bracket 121. In this embodiment, the outer casing 122 has a substantially rectangular parallelepiped shape and a hollow structure with a sleeve connection port 1221 at one end. A gap 1220 remains between the sleeve connection port 1221 and the bottom wall 1213, which prevents aerosols remaining in the power supply case 21 from condensing to form condensate, which would affect the normal operation of the heat-generating structure 11.

[0052] In this embodiment, the outer casing 122 can be detachably connected to the bracket 121. Specifically, in this embodiment, a connecting structure 125 is provided between the outer casing 122 and the bracket 121, and the outer casing 122 and the bracket 121 are detachably connected via the connecting structure 125. In this embodiment, the connecting structure 125 includes a locking hole 1222 and a locking protrusion 1214. The locking protrusion 1214 is disposed to protrude from the outer wall of the bracket 121. Specifically, there are two locking protrusions 1214, and the two locking protrusions 1214 are disposed in a one-to-one correspondence with the outer walls of the first bracket body 121a and the second bracket body 121b. The locking holes 1222 are disposed in two on the side wall of the outer casing 122. The two locking holes 1222 are disposed in a one-to-one correspondence with the two locking protrusions 1214. When the outer casing 122 and the bracket 121 are assembled, the locking protrusions 1214 can be inserted into the locking holes 1222, thereby connecting and fixing the outer casing 122 and the bracket 121 together.

[0053] In this embodiment, a stopper wall 1223 is provided on the side of the outer casing 122 facing the sleeve connection port 1221, and a through hole 1224 is provided in the outer casing 122. Specifically, the through hole 1224 is disposed in the stopper wall 1223, and can allow a part of the heat generating structure 11 to pass through.

[0054] In this embodiment, the sealing member 123 is detachably disposed between the first bracket body 123a and the second bracket body 123b, and is detachably fitted onto the heat-generating structure 11. Specifically, the sealing member 123 is fitted onto the outer periphery of a segment of the sleeve tube 111, sealingly connecting the heat-generating structure 11 with the first bracket body 121a and the second bracket body 121b. In this embodiment, the sealing member 123 may be a silicone material to prevent vibration and damage when the sleeve tube 111 is assembled with the bracket 121. Of course, it can be understood that in some other embodiments, the sealing member 123 is not limited to a silicone material.

[0055] In this embodiment, the sealing member 123 has a hollow structure with both ends penetrated and may have a passage 1230 formed therein. The passage 1230 may be used to drill the sleeve tube 11. In this embodiment, the sealing member 123 includes a sleeve body 1231, a first sealing portion 1232, and a second sealing portion 1233. The sleeve body 1231 is cylindrical and has a hollow structure with both ends penetrated, and is adapted to fit over a portion of the heat-generating structure 11. The first sealing portion 1232 and the second sealing portion 1233 are arranged to protrude from the outer wall of the sleeve body 1231 and are spaced apart along the axial direction of the sleeve body 1231. The first sealing portion 1232 may be arranged along the circumferential direction of the sleeve body 1232 or may be substantially annular. The first sealing portion 1232 is engaged and fixed to the first bracket body 121a and the second bracket body 121b, respectively. Specifically, the first sealing portion 1232 can be fitted into the locking grooves 1211 of the first bracket body 121a and the second bracket body 121b, respectively. The second sealing portion 1233 is arranged to protrude from the outer wall of the sleeve body 1231, may be substantially annular, and has a radial dimension larger than that of the first sealing portion 1232. The second sealing portion 1233 may be arranged on the side away from the locking grooves 1211 of the end walls 1210 of the first bracket body 121a and the second bracket body 121b. When the outer casing 12 and the bracket 121 are assembled, the second sealing portion 1233 is located between the outer casing 122 and the bracket 121, specifically, between the stopper wall 1223 and the end wall 1210, and is used to seal a gap formed between the bracket 121 and the end face of the through hole 1224. In this embodiment, the sleeve body 1231, the first sealing portion 1232, and the second sealing portion 1233 are integrally molded to form a multi-sealed structure, that is, the sealing member 123 can achieve a three-way seal between the outer casing 122, the heat-generating structure 11, and the bracket 121, thereby simplifying the process, saving manufacturing costs, and preventing condensation from entering the bracket 121.

[0056] In this embodiment, the support base 12 is provided with a plurality of conductive members 124. Specifically, the conductive members 124 are arranged in one-to-one correspondence with the conductive portions 1121. Of course, in some other embodiments, there may be only one conductive member 124. The conductive member 124 may be an electrode pillar. The plurality of conductive members 124 are spaced apart on the bottom wall 1213 and detachably connected to the conductive portions 1121. Specifically, when the heat-generating structure 11 is attached to the support base 12, the conductive portions 1121 may be wound around the conductive members 124 and further conductively connected to the conductive members 124. In this embodiment, the conductive members 124 can be electrically connected to the power source in the power supply assembly 20 through contact, thereby electrically connecting the heat-generating structure 11 to the power supply assembly 20 and facilitating replacement of the heat-generating element 122 when the heat-generating structure 11 reaches the end of its service life. In this embodiment, the conductive members 124 may be in two groups, one group conductively connected to the heat-generating structure 11 and the other group connected to the temperature-measuring structure 13. Of course, it can be understood that in some other embodiments, the conductive members 124 may be in one group, and the heat-generating structure 11 and the temperature-measuring structure 13 may share one group of conductive members 124.

[0057] In this embodiment, the heating assembly 10 further includes a temperature measuring structure 13. The temperature measuring structure 13 is disposed on the heating structure 11 and can be detachably connected to the support base 12. In this embodiment, the temperature measuring structure 13 can be fitted onto the outer periphery of a segment of the sleeve tube 111 and detachably connected to the conductive member 124 of the support base 12, thereby achieving a conductive connection when connected thereto. In this embodiment, the temperature measuring structure 13 is fitted onto the sleeve tube 111 at a position corresponding to where the heating portion 1120 and the conductive portion 1121 are connected, and includes a temperature measuring film 131 and a lead wire 132. The temperature measuring film 131 can be fitted onto the outer wall of the sleeve tube 111. The two lead wires 132 are arranged at a distance from each other, with one end connected to the temperature measuring film 131 and the other end connected to the conductive member 132 on the support base 12, which is wound around the corresponding conductive member 132 to provide electrical connection and signal passing. In some embodiments, the lead wires 132 can be welded or crimped to the temperature measuring film 131.

[0058] When assembling the heat generating assembly 10, first, the temperature measuring structure 13 is fitted onto the outer periphery of the sleeve tube 111, then the sealing member 123 is fitted onto the sleeve tube 111 of the heat generating structure 11, and the first bracket body 121a is engaged with the first sealing portion 1232 of the sealing member 123, after which the conductive portion 1121 of the heat generating structure 11 and the lead wire 132 of the temperature measuring structure 13 are wound onto the corresponding conductive member 124, and the second bracket body 121b is fitted onto the second sealing portion 1232. Finally, the entire structure formed by the bracket 121 and the heat-generating structure 11 is inserted into the sleeve connection port 1221 of the outer casing 122, causing the second sealing portion 1233 to abut against the stopper wall 1223 of the outer casing 122 and the end wall 1210 of the bracket 121, allowing a portion of the sealing member 123 and the heat-generating structure 11 to pass through the through-hole 1224, while the locking protrusion 1214 on the outside of the bracket 121 is engaged with the locking hole 1221 of the outer casing 122. When it is necessary to remove the heat-generating structure 11, the outer casing 122 is pushed in the direction of the pointed structure 1112 of the heat-generating structure 11, and then the first bracket body 121a and the second bracket body 121b are separated from the sealing member 123, and the connection between the conductive portion 1121 and the lead wire 132 of the temperature measuring structure 13 and the conductive member 124 is released.

[0059] FIG. 9 shows a second embodiment of the aerosol generating device of the present invention, which differs from the first embodiment in the following respects. The infrared radiation layer 1124 is a composite infrared layer. The composite infrared layer may be formed by combining an infrared layer-forming substrate with a binder for bonding to the antioxidant layer 1123. Specifically, the binder may be glass powder, and the composite infrared layer may be a glass powder composite infrared layer. The reason for using glass powder is that the glass powder melts at high temperatures, thereby bonding the antioxidant layer 1123 and the infrared layer to form a substrate bond, sealing gaps in the infrared layer-forming substrate and further improving breakthrough resistance. After adding glass powder to an infrared layer forming substrate (such as silicon carbide or spinel) and compounding it, the glass powder is applied to the side of the antioxidant layer 1123 away from the heat generating substrate 1122 by dip coating, spray coating, brush coating, etc., and heat treated in a tunnel furnace for 30 minutes. Then, it is placed in a heating furnace, heated to 1000-1200°C, and kept at that temperature for 2 hours. After that, it is cooled to room temperature together with the furnace to create the glass powder composite infrared layer.

[0060] 10 shows a third embodiment of the aerosol generating device of the present invention, which differs from the first embodiment in the following respects: the heating element 112 further includes a bonding layer 1125 disposed between the antioxidant layer 1123 and the infrared emitting layer 1124. The bonding layer 1125 can be used to prevent localized destruction of the heating base 1122 and further improve the bonding strength between the antioxidant layer 1123 and the infrared emitting layer 1124. In some embodiments, the bonding material in the bonding layer 1125 can be glass powder, i.e., the bonding layer 1125 can be a glass powder layer.

[0061] In some embodiments, a binder may be added to the infrared-emitting layer 1124. The binder layer 1125 may have a glass powder with a melting point higher than the melting point of the glass powder in the infrared-emitting layer 1124.

[0062] The above examples only show preferred embodiments of the present invention and are described in detail and specifically, but it should be understood that they do not limit the scope of protection of the present invention. It should be noted that those skilled in the art can freely combine the above technical features and make some modifications and improvements without departing from the concept of the present invention, and all of these should fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made within 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 heating assembly comprising a heating unit (1120) that generates infrared waves when energized, and a sleeve tube (111) through which the infrared waves pass; The heat generating part (1120) includes a heat generating base (1122), an antioxidant layer (1123) provided on the outer surface of the heat generating base (1122) to prevent oxidation of the heat generating base (1122), and an infrared emitting layer (1124) provided on the side of the antioxidant layer (1123) away from the heat generating base (1122), A heat generating assembly characterized in that a non-sealed accommodating cavity (1113) for accommodating the heat generating portion (1120) is formed within the sleeve tube (111), and at least a portion of the heat generating portion (1120) is positioned at a distance from the tube wall of the sleeve tube (111).

2. The heat generating assembly of claim 1, wherein the anti-oxidation layer (1123) comprises an oxide film, the oxide film being formed on an outer surface of the heat generating base (1122).

3. The heat generating assembly of claim 1, wherein the thickness of the anti-oxidation layer (1123) is between 1 um and 150 um.

4. The sleeve tube (111) includes a hollow tubular body (1111), The receiving cavity (1113) is formed in the tubular body (1111), The heat generating assembly according to claim 1, characterized in that the tubular body (1111) has an opening (1110) at one end thereof.

5. The heat generating assembly of claim 4, characterized in that two conductive portions (1121) are connected to the heat generating portion (1120), and both of the conductive portions (1121) pass through the opening (1110).

6. The heat generating assembly of claim 4, characterized in that the sleeve tube (111) includes a pointed structure (1112), the pointed structure (1112) being positioned at one end of the tubular body (1111) away from the opening (1110).

7. The heat generating assembly according to claim 5, further comprising an insulating member (113) at least partially disposed within the sleeve tube (111) and insulatingly arranging the two conductive portions (1121).

8. The heating element (1120) and the sleeve tube (111) are supported by a support (12), and the sleeve tube (111) is at least partially inserted into the support (12). The heat generating assembly according to claim 5, wherein the support base (12) is provided with a conductive member (124) connected to the conductive portion (1121).

9. The support base (12) includes a bracket (121) that supports the sleeve tube (111) and a sealing member (123).

9. The heat generating assembly according to claim 8, wherein the sealing member (123) is fitted onto a segment of the sleeve tube (111) to seal a gap between an inner wall of the bracket (121) and an outer wall of the sleeve tube (111).

10. The heat generating assembly according to claim 9, characterized in that the sealing member (123) has a hollow structure with both ends penetrated, and a passage (1230) is formed inside for the sleeve tube (111) to pass through.

11. The sealing member (123) includes a sleeve body (1231) having both ends penetrating therethrough and adapted to be fitted onto a part of the sleeve pipe (111), and a first sealing portion (1232) protruding from the outer wall of the sleeve body (1231), The heat generating assembly of claim 10, wherein the first sealing portion (1232) is lockingly connected and fixed to the bracket (121).

12. The support base (12) includes an outer casing (122) fitted onto the outer periphery of the bracket (121) and having a sleeve connection port (1221) that cooperates with the bracket (121); The heat generating assembly of claim 11, wherein the bracket (121) includes a bottom wall (1213), and a gap (1220) remains between the sleeve connection port (1221) and the bottom wall (1213).

13. The outer casing (122) is detachably fitted onto the bracket (121), The heat generating assembly according to claim 12, characterized in that the outer casing (122) is provided with a through hole (1224) through which a part of the heat generating structure (11) passes.

14. The heat generating assembly of claim 13, characterized in that the sealing member (123) further includes a sleeve body (1231) having both ends penetrating therethrough and adapted to be fitted onto a portion of the sleeve tube (111), and a second sealing portion (1233) protruding from the outer wall of the sleeve body (1231), the second sealing portion (1233) being positioned between the bracket (121) and the outer casing (122) when the outer casing (122) and the bracket (121) are assembled, and being used to seal a gap formed between the bracket (121) and an end face of the through hole (1224).

15. The heat generating assembly of claim 1, wherein the sleeve tube (111) is made of infrared-transmitting glass, transparent ceramic, or diamond.

16. The heat generating assembly according to claim 1, wherein the entire heat generating element (112) is spaced apart from the wall of the sleeve tube (111).

17. The heat generating assembly according to claim 1, wherein the heat generating element (112) is arranged so as not to be in direct contact with the sleeve tube (111).

18. The heat generating assembly of claim 1, characterized in that the infrared radiation layer (1124) includes an infrared layer and / or a composite infrared layer, and the composite infrared layer is formed by combining an infrared layer forming substrate and a binder for bonding to the antioxidant layer (1123).

19. The heat generating assembly of claim 1, wherein the heat generating substrate (1122) comprises a metal substrate, the metal substrate comprising a nickel-chromium alloy substrate or an iron-chromium-aluminum alloy substrate.

20. An aerosol generating device comprising a heat generating assembly (10) according to any one of claims 1 to 19.

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