Aerosol generation device

Abstract

The present application relates to an aerosol generating device, comprising: a housing; a heating assembly arranged in the housing and having a heating cavity for accommodating an aerosol generating article; a heat insulation structure integrally formed by a heat insulation material and being a sleeve structure with both ends penetrating through, the heat insulation structure being sleeved on the outer periphery of the heating cavity to block the heat conduction of the heating cavity to the housing. The aerosol generating device is provided with a sleeve structure integrally formed and penetrating through both ends, and the heat insulation structure is sleeved on the outer periphery of the heating cavity of the heating assembly, thereby blocking the heat conduction of the heating cavity to the housing, avoiding excessive heat of the housing, and improving the user experience. In addition, the heat insulation structure is an integrally formed sleeve structure, which has the characteristics of simple assembly and high production efficiency.

Description

Technical Field

[0001] This invention relates to the field of aerosol generation technology, and more particularly to aerosol generation apparatus. Background Technology

[0002] In pursuit of miniaturization, consistent aerosol generation, and uniform aerosol output throughout the process to deliver an exceptional user experience, existing aerosol generating devices often employ high heating temperatures. In certain heating scenarios, such as central heating or peripheral heating, heat can easily transfer from the heating components to the outer casing. In particular, peripheral heating can easily cause the outer casing temperature to become excessively high, resulting in a poor user experience.

[0003] Aerosol generating devices in related technologies typically place insulation material around the heating component in multiple layers, which not only results in low generation efficiency but also makes it difficult to ensure the consistency of insulation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an improved aerosol generating device.

[0005] The technical solution adopted by this invention to solve its technical problem is: to construct an aerosol generating device, comprising:

[0006] shell;

[0007] A heating assembly is disposed in the housing and has a heating chamber for accommodating the aerosol-generated article;

[0008] The heat insulation structure is an integrally formed sleeve structure with both ends open. The heat insulation structure is sleeved on the outer periphery of the heating cavity to prevent the heat of the heating cavity from being conducted to the outer shell.

[0009] In some embodiments, the thermal insulation structure is integrally formed by a thermal insulation material; the thermal insulation material further includes a first material, which includes a composite material formed by combining an aerogel material with a matrix material.

[0010] In some embodiments, the matrix material forms a first porous structure, the porosity of which is 50%-98%.

[0011] In some embodiments, the thermal insulation structure is integrally formed of a thermal insulation material; the thermal insulation material includes a second material; the thermal conductivity of the second material is 0.016 W / mk to 0.04 W / mk.

[0012] In some embodiments, the thermal insulation material includes an aerogel material; the aerogel material includes inorganic aerogel materials and / or organic aerogel materials.

[0013] In some embodiments, the second material forms a second porous structure, the porosity of which is 90%-99.8%.

[0014] In some embodiments, the second material is mixed with an infrared light-shielding material.

[0015] In some embodiments, the thickness of the thermal insulation structure is 1 mm to 4 mm.

[0016] In some embodiments, an air layer is provided between the thermal insulation structure and the inner wall of the outer casing.

[0017] In some embodiments, the heating assembly includes a tubular heating structure; the heating structure communicates with the opening; and the heating cavity is formed in the heating structure.

[0018] The axial length of the heat insulation structure is greater than the axial length of the heating structure.

[0019] In some embodiments, the inner and / or outer surfaces of the thermal insulation structure are provided with a film layer to improve thermal performance.

[0020] In some embodiments, the housing has an opening for inserting the aerosol generating article, the opening being in communication with the heating chamber.

[0021] The aerosol generating device of the present invention has the following beneficial effects: the aerosol generating device uses an integrally formed sleeve structure that is open at both ends to fit the heat insulation structure around the heating chamber of the heating component, thereby blocking the heat from the heating chamber from being conducted to the outer shell, preventing the outer shell from getting too hot, and improving the user experience; in addition, since the heat insulation structure is an integrally formed sleeve structure of heat insulation material, it has the characteristics of simple assembly and high production efficiency. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the aerosol generating device in the first embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A partial structural schematic diagram of the aerosol generating device shown.

[0025] Figure 3 yes Figure 2 A partial structural cross-sectional view of the aerosol generating device shown.

[0026] Figure 4 yes Figure 2 A partial exploded view of the aerosol generating device shown.

[0027] Figure 5 yes Figure 4 A partial schematic diagram of the heating structure of the aerosol generating device shown.

[0028] Figure 6 yes Figure 5 A partial structural exploded view of the heating structure shown.

[0029] Figure 7 yes Figure 4 A schematic diagram of the heat insulation structure of the aerosol generating device shown.

[0030] Figure 8 yes Figure 7 A cross-sectional view of the insulation structure shown;

[0031] Figure 9 This is a cross-sectional view of the heat insulation structure of the aerosol generating device in the second embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the heat insulation structure end face of the aerosol generating device in the third embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the end face of the heat insulation structure of the aerosol generating device in the fourth embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram of the heat insulation structure end face of the aerosol generating device in the fifth embodiment of the present invention. Detailed Implementation

[0035] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "upper," "horizontal," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing the technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on the present invention.

[0036] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0037] Figure 1 A first embodiment of the aerosol generating apparatus of the present invention is shown. The aerosol generating apparatus 100 can heat an aerosol generating article in an electrically powered state to release aerosol extracts from the aerosol generating article in a non-combustible state. The aerosol generating article is movably inserted into the aerosol generating apparatus 100, facilitating removal and replacement with a new aerosol generating article for continued use after heating. In some embodiments, the aerosol generating article may be cylindrical; however, in other embodiments, it may also be elliptical, polygonal, or other cylindrical shapes. The aerosol generating article includes an aerosol generating matrix, which comprises solid materials in strip, sheet, or granular form made from the leaves and / or stems of plants (e.g., tobacco or tea leaves), and aroma components may be further added to the solid material.

[0038] like Figure 1 and Figure 2 As shown, in this embodiment, the aerosol generating device 100 may include a housing 10 and a heating component 20 disposed within the housing 10. One end of the housing 10 has an opening 11 for inserting the aerosol generating article. The shape of the opening 11 is adapted to the cross-sectional shape of the aerosol generating article; for example, the opening 11 is circular. Of course, the opening 11 may also be quasi-circular or other shapes, as long as the aerosol generating article can pass through. The heating component 20 is used to heat the aerosol generating article, which is at least partially inserted into the aerosol generating device 100, after being energized. The heating method used by the heating component 20 is not limited; for example, it may employ one or more of resistance heating, electromagnetic heating, infrared heating, laser heating, and microwave heating.

[0039] like Figures 3 to 6As shown, in this embodiment, the heating assembly 20 may include a heating structure 21. The heating structure 21 is a tubular structure with both ends extending through it. The heating structure 21 may be disposed opposite to the opening 11 and may communicate with the opening 11.

[0040] In this embodiment, the heating assembly 20 has a heating cavity 210 communicating with the opening 11; the heating cavity 210 can be used for inserting the aerosol generation matrix of the aerosol generation article. In this embodiment, the heating cavity 210 is formed in the heating structure 21, so that the heating structure 21 heats the aerosol generation matrix of the aerosol generation article by circumferential heating.

[0041] In some other embodiments, the heating structure 21 can also be inserted into the aerosol generating matrix using a center heating method to heat the aerosol generating matrix. The heating cavity 210 can be formed on the outer periphery of the heating structure 21, for example, by fitting a fixing tube around the outer periphery of the heating structure 21 to fix the aerosol generating matrix, with the heating cavity 210 formed inside the fixing tube.

[0042] In this embodiment, the heating structure 21 may include a substrate 211 and a heating element 213 disposed on the substrate 211. The substrate 211 may be used to support the heating element 213 or to contain the aerosol generating matrix 200. The heating element 213 may be disposed on the outer periphery of the substrate 211 and may be used to heat at least a portion of the aerosol generating matrix inserted into the substrate 211 when energized. In some other embodiments, the heating element 213 may not be limited to being disposed on the outer periphery of the substrate 211, but may also be disposed on the inner side of the substrate 211.

[0043] In this embodiment, the substrate 211 is a hollow structure with both ends open, and it can be generally cylindrical. The substrate 211 may include a first end 211a and a second end 211b; the first end 211a and the second end 211b can be arranged sequentially along the aerosol output direction, that is, the second end 211b is closer to the opening 11 than the first end 211a. The first end 211a and the second end 211b are open structures, and a heating cavity 210 is formed between the first port 211a and the second port 211b. It can be understood that in some other embodiments, the substrate 211 may also be a hollow structure with one end open. In some embodiments, the substrate 211 is not limited to being cylindrical, but can be plate-shaped.

[0044] In this embodiment, the substrate 211 can be made of metal, such as stainless steel, aluminum, or aluminum alloy. In some embodiments, the substrate 211 can also be made of non-metallic materials, such as ceramic materials (e.g., zirconium oxide) or quartz glass.

[0045] In this embodiment, a protective layer 212 may be provided on the substrate 211, and the protective layer 212 may be provided on both the inner and outer surfaces of the substrate 211. In some other embodiments, the protective layer 212 may be provided only on the inner or outer surface of the substrate 211. In this embodiment, the protective layer 212 may be an insulating material; specifically, the protective layer 212 may be an insulating glaze layer, and the protective layer 212 may be prepared on the inner and outer surfaces of the substrate 211 by dip-coating and sintering. By providing the protective layer 212, the strength of the substrate 211 can be improved, and it is also beneficial to insulate the substrate 211 from the heating structure 21.

[0046] In this embodiment, the heating element 213 can be in the form of a film strip; in other embodiments, it can also be in the form of a long, thin sheet. The heating element 213 is wound around the substrate 211. Specifically, the heating element 213 can be wound around the outer surface of the substrate 211 and fixed to the outer surface of the substrate 211 by sintering. In other embodiments, the heating element 213 can be integrally formed with the substrate 211, thereby facilitating the assembly of the heating element 20. In still other embodiments, the heating element 213 can also be disposed on the inner surface of the substrate 211. Correspondingly, the substrate 211 can be made of a material with low thermal conductivity, which helps to reduce the heat diffused outward from the heating element 213 and reduce heat loss.

[0047] In this embodiment, the heating component 213 is located between the first end 211a and the second end 211b of the substrate 211. The heating component 213 includes a carrier 2131, a heating unit 2132, and at least two conductive units 2133. The carrier 2131 is longitudinally arranged and can be used to support the heating unit 2132 and at least two conductive units 2133. When the heating structure 21 is wound and fixed to the outer surface of the substrate 211, the carrier 2131 can extend circumferentially along the substrate 211. In this embodiment, the heating unit 2132 can be disposed on the surface of the carrier 2131 facing the substrate 211, and the heating unit 2132 can generate heat to heat the aerosol generation matrix 200 when energized. There can be at least three heating units 2132. Specifically, there can be three heating units 2132. In some other embodiments, there can be one, two, or more than three heating units 2132. The at least two conductive units 2133 can be disposed on the surface opposite to the heating unit 2132 and are conductively connected to the heating unit 2132. Each conductive unit 2133 is disposed between the first end 211a and the second end 211b, and the conductive unit 2133 can be used to conductively connect the heating unit 2132 to the power supply component 50. The distance from at least one conductive unit 2133 to the second end 211b is less than the distance from the other conductive unit 2133 to the second end 211b, that is, the distance from at least one conductive unit 2133 to the second end 211b is not equal to the distance from the other conductive unit 2133 to the second end 211b. Furthermore, the width of the conductive unit 2133 disposed near the second end 211b in the circumferential direction of the base 211 is greater than the width of the conductive unit 2133 disposed near the first end 211a in the circumferential direction of the base 211. In other words, in this embodiment, at least some of the conductive units 2133 can be widened to meet the actual conductivity requirements, thereby achieving the function of uniformly heating the circumferential temperature of the structure 21.

[0048] The heating structure 21 is formed by carrying the heating unit 2132 and the conductive unit 2133 on the carrier 2131 and then placed on the substrate 211. By placing the heating unit 2132 and the conductive unit 2133 in different layers, the upward extension angle of the multiple heating units 2132 around the substrate 211 is basically consistent (the deviation of the upward extension angle of the multiple heating units 2132 around the substrate 211 is within a very small range, which is negligible, such as no more than 3 degrees). This avoids interference between the conductive unit 2133 and the heating unit 2132. In addition, the area available for the heating unit 2132 is increased, and it is beneficial to set multiple heating units 2132 in the axial direction of the substrate 211, thereby increasing the heating area of ​​the heating unit 2132, improving heating consistency, improving the consistency of the sucking taste, and reducing the overall energy consumption.

[0049] In this embodiment, the carrier 2131 can be a film strip, and it is made of non-conductive material by casting. Specifically, the carrier 2131 can be a ceramic film strip or a glass film strip. The carrier 2131 is rectangular, and it can be wound into a cylindrical shape. Its length direction can be set to correspond to the circumferential direction of the substrate 211, and its width direction can be set to correspond to the axial direction of the substrate 211.

[0050] In this embodiment, each heating unit 2132 may include a heating body and two electrodes (a first electrode and a second electrode) disposed at both ends of the heating body. Each heating unit 2132 is electrically connected to two conductive units 2133 through the first electrode and the second electrode, respectively.

[0051] The first and second electrodes of each heating unit 2132 can be offset in the circumferential direction of the substrate 211. Of course, in other embodiments, the first and second electrodes of each heating unit 2132 can also be offset in the axial direction of the substrate 211, or the first and second electrodes of each heating unit 2132 can be offset in both the circumferential and axial directions of the substrate 211.

[0052] The heating unit 2132 includes a conductive material that can convert electrical energy into heat energy by utilizing the resistance heating effect generated when an electric current passes through the conductive material. In some embodiments, the heating unit 2132 may include a metallic material, or a mixture of a metallic material and a non-metallic material (e.g., glass). The heating unit 2132 may be a heating film formed by methods such as screen printing or deposition. Of course, in other embodiments, the heating unit 2132 may also be a mesh, array, or fabric formed of conductive wires or conductive sheets.

[0053] The conductive unit 2133 and the heating unit 2132 can partially overlap in the thickness direction of the carrier 213131. Specifically, the projection of the conductive unit 2133 onto the thickness direction of the carrier 213131 of the heating unit 2132 can overlap with the electrode of the heating unit 2132, thereby improving the stability of the connection between the conductive unit 2133 and the heating unit 2132.

[0054] In this embodiment, the conductive unit 2133 can be a conductive film, specifically a conductive metal film, such as a copper film or a silver film. The conductive unit 2133 can be formed on the carrier 2131 by screen printing; specifically, each conductive unit 2133 can be formed on the carrier 2131 by screen printing. It is understood that in some other embodiments, the conductive unit 2133 is not limited to being formed on the carrier 2131 by screen printing; it can also be fixed to the carrier 2131 by adhesive bonding or welding.

[0055] In this embodiment, the heating structure 21 further includes an electrode connector 214, which is disposed on the outside of the conductive unit 2133 and electrically connected to the conductive unit 2133. Specifically, the electrode connector 214 overlaps with at least a portion of the conductive unit 2133 to improve the reliability of the electrical connection. Each conductive unit 2133 may be provided with one electrode connector 214.

[0056] In this embodiment, the electrode connector 214 can be generally sheet-shaped and can be a metal sheet with good conductivity. The electrode connector 214, the conductive unit 2133, and the connecting material (such as solder or adhesive) connecting the conductive unit 2133 and the electrode connector 214 can be made of the same material with similar or identical coefficients of thermal expansion, facilitating bonding through welding, sintering, or other methods. Preferably, the electrode connector 214 can be made of silver, and the conductive unit 2133 can be made of silver film. Using silver material can improve the bonding force between the electrode connector 214 and the conductive unit 2133, reduce resistivity, and improve conductivity.

[0057] In this embodiment, the heating assembly 20 further includes a first fixing structure 22 and a second fixing structure 23, which are respectively disposed at both ends of the heating structure 21 and can be used to fix the heating structure 21. The first fixing structure 22 and the second fixing structure 23 can be arranged sequentially along the aerosol output direction. Of course, it is understood that in some other embodiments, there may only be one fixing structure. The heating assembly 20 can be fixed to the outer casing 10 by the first fixing structure 22.

[0058] In this embodiment, the first fixing structure 22 may include a fixing base 221 and a conductive sheet 222. The fixing base 221 can be used to support the heating structure 21 and fix the heating structure 21. The conductive sheet 222 can be disposed on the fixing base 221 and can be connected to the electrode connector 214 of the heating structure 21.

[0059] In this embodiment, the mounting base 221 can be made of plastic, or other insulating materials such as ceramic. Furthermore, the mounting base 221 can be made of a material with low thermal conductivity to reduce heat transfer.

[0060] In this embodiment, the fixing base 221 may include a fixing part 221a and a base body 221b. The fixing part 221a and the base body 221b are coaxially arranged. The fixing part 221a can extend out of the base body 221b. The fixing part 221b may be generally cylindrical, and may include a cylindrical sidewall 2210 and a bottom wall 2211; the cylindrical sidewall 2210 and the bottom wall 2211 together define a cavity 2212. The heating structure 21 can be partially inserted into the cavity 2212, and the bottom wall 2211 can be used to support the aerosol generation matrix. The outer diameter of the base body 221b may be larger than the outer diameter of the fixing part 221b, and its end face facing the opening 11 may form a stepped surface for supporting the heat insulation structure 30.

[0061] In this embodiment, the conductive sheet 222 can be fixed to the fixing base 221. Specifically, the conductive sheet 222 can be partially embedded in the fixing base 221 for fixation. In some embodiments, the conductive sheet 222 and the fixing base 221 can be integrally combined by injection molding to form an integral first fixing structure 22, which makes the fixing of the conductive sheet 222 more secure and improves the reliability of the electrical connection. Of course, in other embodiments, the conductive sheet 222 and the fixing base 221 can also be fixed to each other by snap-fit ​​connection, riveting, or other methods.

[0062] The first fixing structure 22 has a conductive sheet 222 and a fixing seat 221 that are fixed to each other, so that the first fixing structure 22 has both a fixing function, which can fix the heating structure 21 through the fixing seat 221, and an electrical connection function, which can achieve electrical connection with the heating structure 21 through the conductive sheet 222.

[0063] The conductive sheet 222 may also have a portion located outside the fixing base 221 for connection to the conductive unit 2133 of the heating structure 21, and another portion located outside the fixing base 221 for connection to the control board 40. Specifically, in some embodiments, the conductive sheet 222 may be arranged in a one-to-one correspondence with the electrode connector 214, and may be connected to the electrode connector 214 in a one-to-one correspondence, thereby being electrically connected to the conductive unit 2133.

[0064] In this embodiment, the second fixing structure 23 can be sleeved on the end of the heating structure 21 away from the first fixing structure 22. The second fixing structure 23 can be a through-structure at both ends, coaxially arranged with and communicating with the heating structure 21. The second fixing structure 23 can cooperate with the first fixing structure 22 to fix the heating structure 21.

[0065] like Figure 3 , Figure 7 ,and Figure 8As shown, in this embodiment, the aerosol generating device further includes a heat insulation structure 30. This heat insulation structure 30 is integrally formed from heat insulation material and is a sleeve structure with both ends open. It can be fitted around the outer periphery of the heating cavity 210 to prevent heat from the heating cavity 210 from being conducted to the outer shell 10. Specifically, the heat insulation structure 30 can be fitted around the outer periphery of the heating structure 21 (i.e., around the outer periphery of the heating cavity 210), with one end abutting against the support portion 221b of the fixing seat 221. Of course, it is understandable that in some embodiments, when the heating structure 21 is a central heating structure, the heat insulation structure 30 can be fitted around the outer periphery of the fixing tube that fixes the aerosol generating matrix, or the heat insulation structure 30 can be directly fitted around the outer periphery of the heating structure 21, forming an annular heating cavity 210 between its inner sidewall and the outer sidewall of the heating structure 21.

[0066] In this embodiment, by setting the heat insulation structure 30, the heat from the heating cavity 210 can be prevented from being directly conducted to the outer shell 10, thus preventing the outer shell 10 from getting too hot and improving the user experience. The heat insulation structure 30 is a sleeve structure integrally formed of heat insulation material, which can be directly installed on the outer periphery of the heating structure 21, replacing the need for multiple layers of heat insulation material, thereby improving the ease of assembly, increasing production efficiency, reducing production costs, and ensuring the consistency of heat insulation, and maximizing the utilization of the heat insulation space.

[0067] In this embodiment, the thermal insulation material can be a first material, which can be a composite material formed by combining aerogel material and a matrix material. The thermal insulation structure can be directly molded into an integral sleeve structure using the first material. Using a composite material formed by combining aerogel material and a matrix material utilizes the low thermal conductivity of aerogel material, and the matrix material supports the aerogel material, avoiding the overall low strength caused by the excessive brittleness of the thermal insulation structure formed by pure aerogel material, and preventing the thermal insulation structure 30 from breaking due to bumps or drops during use.

[0068] In this embodiment, the matrix material can form a first porous structure. In this embodiment, the matrix material can be a pre-formed porous material with a three-dimensional porous structure, including but not limited to organic materials such as melamine foam, polyimide foam, polystyrene foam, and polyurethane foam. In some embodiments, the matrix material can also be an inorganic material such as melamine foam, polyimide foam, polystyrene foam, and polyurethane foam. The matrix material can also be pre-formed with a porous structure using a material capable of forming a porous structure. By forming a porous structure, the heat resistance of the matrix material can be improved.

[0069] In this embodiment, the porosity of the first porous structure can be 50%-98%; further, in some embodiments, the porosity of the first porous structure can be 80%-95%; by selecting this porosity, the thermal insulation performance of the thermal insulation structure 30 can be improved, and the overall strength of the thermal insulation structure 30 can be guaranteed, avoiding the breakage of the thermal insulation structure 30.

[0070] In some embodiments, the aerogel material includes inorganic aerogel materials, including but not limited to silica, graphene, etc. In other embodiments, the aerogel material can be an organic aerogel material or a mixture of inorganic and organic aerogel materials, including polyimide, polyamide, cellulose, etc. In this embodiment, the aerogel material can be first prepared as an aerogel precursor solution.

[0071] The preparation of the thermal insulation structure 30 in this embodiment may include the following steps: preparing an aerogel precursor solution using an aerogel material, shaping the matrix material into the desired shape, for example, by cutting with a die, or in some embodiments, cutting it into a cylindrical shape with both ends open; then soaking in the aerogel precursor solution, so that the aerogel penetrates into the pores of the matrix material, the inner surface and / or the outer surface of the matrix material; finally, obtaining the thermal insulation structure 30 as an integral sleeve structure through the sol-gel, aging and drying process.

[0072] In some embodiments, the thermal insulation structure 30 may be a multilayer structure, such as a matrix layer 30a and a thermal insulation layer 30b formed on the matrix layer 30a. The thermal insulation layer 30b may be formed of the aerogel material, and the matrix layer 30a may be a porous structure in which the aerogel material is embedded. In other embodiments, the thermal insulation structure 30 may also be a single-layer structure, such as a single-layer structure formed by embedding aerogel material within a matrix material. In some embodiments, the thermal insulation structure 30 may also consist solely of aerogel material.

[0073] In this embodiment, the cross-section of the heat insulation structure 30 can be a regular shape, such as a circular ring. In other embodiments, the cross-section of the heat insulation structure 30 is not limited to a circle, but can also be a triangular ring, an elliptical ring, etc. In other embodiments, the cross-section of the heat insulation structure 30 can also be an irregular shape, for example, the cross-section of the heat insulation structure 30 can be partially irregular, thereby leaving a local gap between the heat insulation structure 30 and the inner wall of the outer shell 10. This gap can create a local air layer, reduce the contact area between the material and the outer shell 10, and slow down the heat transfer to the outer shell 10. Generally, the cross-sectional shape of the heat insulation structure 30 can be designed according to the shape of the heating component 20 and the outer shell 10.

[0074] In this embodiment, the thickness D of the heat insulation structure 30 can be 1mm to 4mm. In this embodiment, the thickness D of the heat insulation structure 30 can be uniformly set in its axial direction. In some other embodiments, the thickness D of the heat insulation structure 30 can be gradually varied in its axial direction, generally designed according to the heat source gradient. The thickness D can be the difference between the outer diameter and the inner diameter, wherein the inner diameter of the heat insulation structure 30 can be greater than the maximum outer diameter of the heating structure 21, and the outer diameter can be smaller than the minimum dimension in the transverse direction of the outer shell 10. In some embodiments, the thickness of the heat insulation structure 30 can be further selected as 2.75mm to 3.5mm. In some embodiments, the axial length of the heat insulation structure 30 can be greater than the axial length of the heating structure 21, the length L of the heating structure 21 can be greater than the distance between the first fixing structure 22 and the second fixing structure 23, and the heat insulation structure 30 can be sleeved on the outer periphery of the fixing part 221a of the first fixing structure 22, the heating structure 21, and part of the second fixing structure 23. The axial length L of the heat insulation structure 30 can be 20mm to 35mm.

[0075] In this embodiment, an air layer 112 may be provided between the heat insulation structure 30 and the outer shell 10. Specifically, generally, the air layer 112 may be formed by a gap left between part or all of the heat insulation structure 30 and the outer shell 10.

[0076] In this embodiment, the aerosol generating device 100 further includes a power supply component 50 and a control board 40 disposed in the housing 10. The control board 40 is provided with a control circuit, which is electrically connected to both the power supply component 50 and the heating component 20 to control the power supply and de-energization between them. Furthermore, the control circuit can also control the power output of the power supply component 50 to the heating component 20.

[0077] Thermocouple tests were performed on the housings of the aerosol generating device using the thermal insulation structure 30 of the present invention and those using conventional thermal insulation structures. The specific test environment temperature was 25–26°C; the test procedure is as follows:

[0078] Aspirate the first aerosol product, aspirate for 2 seconds, stop for 28 seconds, then aspirate 9 more times; aspirate the second aerosol product and repeat the operation.

[0079] The test results are shown in the table below:

[0080]

[0081] As shown in the table above, the shell temperature is optimized by 1 to 3°C when using a 30-fold multi-layer wound insulation material with a thickness of D=2.4mm compared to 3*0.8mm.

[0082] Figure 9A heat insulation structure 30 of the aerosol generating device in a second embodiment of the present invention is shown. The difference between this structure and the first embodiment is that the heat insulation material of the heat insulation structure 30 includes a second material, which can be an aerogel material, particularly a pure aerogel material. The thermal conductivity of the second material can be 0.016 W / mK to 0.04 W / mK. In some embodiments, the aerogel material can be an inorganic aerogel material, including but not limited to silica, graphene, etc. In other embodiments, the aerogel material can be an organic aerogel material or a mixture of inorganic and organic aerogel materials, including polyimide, polyamide, cellulose, etc.

[0083] The preparation of the thermal insulation structure 30 in this embodiment may include the following steps: First, a hollow mold matching the heating structure 21 may be prepared; an aerogel material is prepared into an aerogel precursor solution, and the aerogel precursor solution is filled into the mold. Then, through a series of processes such as sol-gel, aging, drying, and demolding, a thermal insulation structure 30 with an integral aerogel structure matching the heating structure 21 and having a sleeve structure is obtained. In some embodiments, if aerogel materials with relatively weak strength, such as silica, are used, they can be used together with the hollow mold as an integral part. Generally, the mold includes thin-walled metal, thin-walled PEEK, thin-walled silicone parts, etc.

[0084] In this embodiment, the second material can form a second porous structure 30 with a porosity of 90%-99.8%. Forming a porous structure with this porosity can improve thermal insulation performance and reduce heat transfer. In some embodiments, the second material can also form a non-porous structure.

[0085] In this embodiment, the second material may be mixed with an infrared shading material, which includes, but is not limited to, SiC, TiO2, etc. Infrared thermal radiation can be reduced by doping and mixing infrared shading materials into the second material.

[0086] In this embodiment, the inner and / or outer surfaces of the heat insulation structure 30 may be provided with films that improve thermal performance. Generally, by appropriately modifying the dimensions of the heat insulation structure 30, at least one of a phase change film, a thermally conductive film, and a high-reflectivity film can be laminated onto the outer and / or inner surfaces of the heat insulation structure 30. The thermally conductive film can be selected from thermally conductive materials such as graphene and copper foil. By laminating these films, the overall thermal performance of the device can be comprehensively improved.

[0087] In some embodiments, the second material may also include aerogel materials and other functional materials, and the aerogel materials may be used in combination with other functional materials.

[0088] Figure 10The invention illustrates a heat insulation structure 30 of a third embodiment of the aerosol generating device of the present invention. The difference between this structure and the first embodiment is that the cross-section of the heat insulation structure 30 is not limited to a circular ring shape, but can be a similar elliptical ring shape.

[0089] Figure 11 The invention illustrates a heat insulation structure 30 of a fourth embodiment of the aerosol generating device of the present invention. The difference between this structure and the first embodiment is that the cross-section of the heat insulation structure 30 is not limited to a circular shape, but can be similar to a triangular ring shape.

[0090] Figure 12 The invention shows a heat insulation structure 30 of a fifth embodiment of the aerosol generating device of the present invention. The difference between the heat insulation structure 30 and the first embodiment is that the cross-section of the heat insulation structure 30 is not limited to being annular, but can be approximately irregular in shape.

[0091] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. An aerosol generating device, characterized in that, include: Outer shell (10); A heating assembly (20) is disposed in the housing (10) and has a heating chamber (210) for accommodating the aerosol-generated article; The heat insulation structure (30) is an integrally formed sleeve structure with both ends open. The heat insulation structure (30) is sleeved on the outer periphery of the heating cavity (210) to prevent the heat of the heating cavity (210) from being conducted to the outer shell (10).

2. The aerosol generating device according to claim 1, characterized in that, The thermal insulation structure (30) is integrally formed by thermal insulation material; the thermal insulation material also includes a first material, which includes a composite material formed by combining an aerogel material and a matrix material.

3. The aerosol generating device according to claim 2, characterized in that, The matrix material forms a first porous structure, the porosity of which is 50%-98%.

4. The aerosol generating device according to claim 1, characterized in that, The thermal insulation structure (30) is integrally formed by thermal insulation material; the thermal insulation material includes a second material; the thermal conductivity of the second material is 0.016W / mk to 0.04W / mk.

5. The aerosol generating device according to claim 4, characterized in that, The thermal insulation material includes aerogel material; the aerogel material includes inorganic aerogel material and / or organic aerogel material.

6. The aerosol generating device according to claim 2, characterized in that, The second material forms a second porous structure with a porosity of 90%-99.8%.

7. The aerosol generating device according to claim 4, characterized in that, The second material contains an infrared light-shielding material.

8. The aerosol generating apparatus according to claim 1, characterized in that, The thickness of the heat insulation structure (30) is 1mm to 4mm.

9. The aerosol generating device according to claim 1, characterized in that, An air layer (112) is provided between the heat insulation structure (30) and the inner wall of the outer shell (10).

10. The aerosol generating apparatus according to claim 1, characterized in that, The heating assembly (20) includes a tubular heating structure; the heating cavity (210) is formed in the heating structure; The axial length of the heat insulation structure (30) is greater than the axial length of the heating structure.

11. The aerosol generating apparatus according to claim 1, characterized in that, The inner and / or outer surfaces of the thermal insulation structure (30) are provided with a film layer to improve thermal performance.

12. The aerosol generating apparatus according to claim 1, characterized in that, The outer casing (10) has an opening (11) for inserting the aerosol generating article, the opening (11) being in communication with the heating chamber (210).

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