Aerosol-generating device

Abstract

The utility model relates to an aerosol generating device, which comprises a shell, an aerosol generating device and an aerosol generating device, the accommodating pipe is arranged in the shell; and the heat insulation pipe is arranged on the periphery of the accommodating pipe. The heat-insulating pipe comprises a heat-insulating inner pipe and a heat-insulating outer pipe, and a heat-insulating cavity is formed between the heat-insulating inner pipe and the heat-insulating outer pipe. The heat insulation outer pipe is provided with a first end face close to the inserting opening and a second end face away from the inserting opening, and at least one of the first end face and the second end face is suspended. In this way, heat transmitted outwards through at least one end face of the heat insulation outer pipe in a thermal contact conduction mode can be reduced, and the heat insulation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol generation, and more specifically, to an aerosol generating device. Background Art

[0002] Heat-not-burn aerosol-generating devices typically use a tubular, sheet, or rod-shaped heating element to heat the aerosol-generating medium, releasing the aerosol extract from the aerosol-generating medium without burning it. The operating temperature of the heating element is typically around 180°C to 350°C, requiring excellent thermal insulation to prevent the surface temperature of the housing from overheating, which could affect the user experience.

[0003] Currently, a common insulation technology in the market involves installing an insulation tube, such as a vacuum insulation tube, outside the heat generating body. Existing insulation tubes are typically secured to the structural member at their top and bottom ends. Heat from the insulation tube is transferred to the outer shell through thermal contact conduction, significantly reducing the insulation effectiveness of the insulation tube. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide an aerosol generating device with better heat insulation effect in view of the above-mentioned defects of the prior art.

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

[0006] A housing, one end of which has a socket for inserting an aerosol generating medium;

[0007] a receiving tube disposed in the housing and having a receiving cavity formed therein for receiving at least a portion of the aerosol generating medium; and

[0008] The heat-insulating tube is arranged on the periphery of the receiving tube.

[0009] The heat-insulating tube comprises a heat-insulating inner tube and a heat-insulating outer tube arranged outside the heat-insulating inner tube, and a heat-insulating cavity is formed between the heat-insulating inner tube and the heat-insulating outer tube.

[0010] The heat-insulating outer tube has a first end surface close to the socket and a second end surface away from the socket, and at least one of the first end surface and the second end surface is suspended.

[0011] In some embodiments, the first end surface is suspended.

[0012] In some embodiments, the first end surface and the second end surface are both suspended.

[0013] In some embodiments, the thermal insulation chamber is a vacuum chamber.

[0014] In some embodiments, the outer side of the heat-insulated outer tube has a first fixing position, and the heat-insulated outer tube is fixed in the shell through the first fixing position.

[0015] The distance between the first fixing position and the first end surface is greater than or equal to 2 mm, and the distance between the first fixing position and the second end surface is greater than or equal to 2 mm.

[0016] In some embodiments, the first fixing position is recessed or protruded along the circumference of the outer wall of the thermal insulation outer tube.

[0017] A second fixing position is formed in the housing and is engaged with the first fixing position.

[0018] In some embodiments, the first fixing position is an annular groove provided along the circumference of the outer wall of the thermal insulation outer tube.

[0019] The shell includes a first inner shell and a second inner shell, and the second fixing position includes a first part protruding from the inner wall surface of the first inner shell and a second part protruding from the inner wall surface of the second inner shell. The first part and the second part are respectively inserted into the first fixing position from both sides of the insulated outer tube.

[0020] In some embodiments, a limiting portion is formed by a protrusion in the shell, and the limiting portion and the second fixing position are spaced apart in the axial direction of the insulating outer tube. The limiting portion contacts or has a clearance fit with the outer wall surface of the insulating outer tube.

[0021] In some embodiments, the aerosol generating device further comprises at least one insulation layer disposed between the insulation inner tube and the receiving tube.

[0022] In some embodiments, the at least one insulation layer includes an aerogel insulation layer wrapped around the receiving tube and an insulation support tube sleeved outside the aerogel insulation layer, and the outer wall surface of the insulation support tube is spaced apart from the inner wall surface of the insulation inner tube.

[0023] The implementation of the present invention has at least the following beneficial effects: at least one end face of the heat-insulating outer tube is suspended, thereby reducing the amount of heat transferred outward by heat contact conduction through the at least one end face, thereby improving the heat insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the aerosol generating device in some embodiments of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the longitudinal cross-sectional structure of the aerosol generating device shown;

[0027] Figure 3 yes Figure 2 Side view of the insulated tube;

[0028] Figure 4 yes Figure 1 a cutaway exploded view of the aerosol generating device shown;

[0029] Figure 5 yes Figure 4 Schematic diagram of the decomposed structure of the heating body. DETAILED DESCRIPTION

[0030] In order to provide a clearer understanding of the technical features, objectives, and effects of the present invention, a specific embodiment of the present invention will now be described in detail with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings or the orientation or position relationship in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, a first feature being "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] Figures 1 to 2 An aerosol-generating device 100 in some embodiments of the present invention is shown. It can be used to contain at least a portion of an aerosol-generating medium and, when powered, heat the aerosol-generating medium to generate an aerosol for inhalation or ingestion by a user. The heating method employed by the aerosol-generating device 100 is not limited; for example, it can employ one or more of resistance heating, electromagnetic heating, infrared heating, and the like.

[0036] The aerosol-generating medium can be in a columnar shape, such as a cylindrical shape. The aerosol-generating medium comprises an aerosol-generating material capable of generating an aerosol upon heating. The aerosol-generating material can be, but is not limited to, processed from tobacco, tea leaves, or other plant materials. The aerosol-generating medium can be removably inserted into the aerosol-generating device, allowing for easy removal and replacement of the aerosol-generating medium for continued use after heating is complete.

[0037] The aerosol-generating device 100 includes a housing 10 and a heating element 90 disposed within the housing 10. The heating element 90 includes a receiving tube 30, the inner wall of which defines a chamber 310 for receiving at least a portion of an aerosol-generating medium. One end of the housing 10 (the upper end shown) has an insertion port 1110 for inserting the aerosol-generating medium into the chamber 310. During use, a user inserts an aerosol-generating medium, such as a cigarette, into the chamber 310 through the insertion port 1110. When powered on, the aerosol-generating device 100 heats the aerosol-generating medium contained within the chamber 310.

[0038] The upper end of the housing 10 has a top wall 111, and a socket 1110 is provided through the top wall 111. In some embodiments, a dust cover 112 can be slidably provided on the top wall 111 to cover or reveal the socket 1110. When the aerosol generating device 100 is not in use, the dust cover 112 can be pushed to cover the socket 1110 to prevent dust from entering the socket 1110. When it is needed, the dust cover 112 is pushed to expose the socket 1110 so that the aerosol generating medium can be inserted through the socket 1110. Of course, in other embodiments, the dust cover 112 can also have other structures. For example, the dust cover 112 can also be rotatably provided on the top wall 111, so that the socket 1110 can be exposed or covered by flipping or rotating.

[0039] The aerosol-generating device 100 may further include a battery 20 and a control circuit disposed within the housing 10. In some embodiments, the housing tube 30 may also be configured to generate energy when energized to heat the aerosol-generating medium contained therein. The control circuit is electrically connected to the battery 20 and the housing tube 30, respectively, and can control the connection or disconnection of the path between the battery 20 and the housing tube 30 to turn heating on or off.

[0040] like Figures 2 to 5 As shown, in some embodiments, the receiving tube 30 may include a base tube 31 and a heating layer 32 disposed on the inner and / or outer surface of the base tube 31. The base tube 31 may be a circular tube with two through ends, and its inner wall defines a receiving cavity 310. The heating layer 32 is connected to a control circuit and is configured to generate heat when energized to heat the aerosol-generating medium inserted into the base tube 31. Preferably, the heating layer 32 is disposed on the outer surface of the base tube 31 to facilitate processing and manufacturing.

[0041] In some embodiments, the heating layer 32 may be a membrane structure, which may include an infrared film and a resistive heating circuit arranged on the outer surface of the base tube 31. After the resistive heating circuit is connected to a power source, heat is generated, and the heat is transferred to the base tube 31. The base tube 31 transfers the heat to the infrared film, and / or the resistive heating circuit directly transfers the heat to the infrared film. After the infrared film is heated, infrared light waves are generated. The infrared light waves pass through the base tube 31 and are absorbed by the aerosol-generating medium inserted into the base tube 31, thereby heating the aerosol-generating medium. In addition, the base tube 31 can also heat the aerosol-generating medium in contact with it through heat conduction. Accordingly, the base tube 31 can be made of transparent ceramics, quartz, and other materials that are permeable to infrared light waves. Of course, in other embodiments, the infrared film and / or the resistive heating circuit can also be arranged on the inner surface of the base tube 31.

[0042] In other embodiments, the heat generating layer 32 can also be a conventional infrared heat film that actively generates heat and radiates infrared light when powered. The infrared heat film can be disposed on the outer surface and / or the inner surface of the base tube 31.

[0043] Of course, in some embodiments, the heat generating layer 32 can also only include the electrically resistive heating circuit, i.e., the receiving tube 30 is an electrically resistive heating receiving tube.

[0044] In other embodiments, the receiving tube 30 can also not participate in heat generation. For example, the receiving tube 30 can be sleeved with an electromagnetic coil for generating an electromagnetic field when powered, and the aerosol generating medium can be provided with a susceptor material for converting electromagnetic energy into heat. For another example, the aerosol generating device 100 further includes a rod-shaped or sheet-shaped heating body that can be inserted into the aerosol generating medium and heat the aerosol generating medium when powered.

[0045] In some embodiments, the heat generating body 90 further includes a heat insulation tube 50 disposed in the housing 10. The heat insulation tube 50 is disposed around the receiving tube 30 to reduce the heat transferred from the receiving tube 30 to the housing 10, thereby reducing heat loss and improving energy efficiency.

[0046] In some embodiments, the heat insulation tube 50 and the receiving tube 30 can both be circular tubes, and the heat insulation tube 50 and the receiving tube 30 can be coaxially disposed. In other embodiments, the heat insulation tube 50 and / or the receiving tube 30 can also be elliptical tubes, racetrack-shaped tubes, polygonal tubes, or other shapes, and of course, the heat insulation tube 50 and the receiving tube 30 can also be disposed non-coaxially.

[0047] The two ends of the heat insulation tube 50 can respectively extend out of the two ends of the receiving tube 30, and the heat insulation effect is better. Of course, in other embodiments, the heat insulation tube 50 can also only extend out of the upper end of the receiving tube 30, or the heat insulation tube 50 can also only extend out of the lower end of the receiving tube 30, or the two ends of the heat insulation tube 50 can also be flush with the two ends of the receiving tube 30.

[0048] The heat insulation pipe 50 can include a heat insulation inner pipe 52 and a heat insulation outer pipe 51 sleeved outside the heat insulation inner pipe 52. The heat insulation inner pipe 52 and the heat insulation outer pipe 51 can be coaxially arranged, but are not limited to be coaxially arranged. An outer wall surface of the heat insulation inner pipe 52 and an inner wall surface of the heat insulation outer pipe 51 form a heat insulation cavity 510, and heat transfer from the heat insulation inner pipe 52 to the heat insulation outer pipe 51 is reduced through the heat insulation cavity 510. The heat insulation cavity 510 can be a closed cavity, and preferably, the heat insulation cavity 510 can be subjected to vacuumization treatment, thereby forming a vacuum heat insulation cavity. In a vacuum environment, heat is hardly transferred through conduction, and thus the heat insulation inner pipe 52 can greatly reduce heat radiation to the heat insulation outer pipe 51, and the heat insulation effect is better. Of course, in other embodiments, the heat insulation cavity 510 can also be filled with other gases having a lower thermal conductivity than air, such as halide gas. In some other embodiments, the heat insulation cavity 510 can also be filled with aerogel and other heat insulation materials.

[0049] The heat insulation inner pipe 52 and the heat insulation outer pipe 51 are made of heat insulation materials having a low thermal conductivity, which include heat insulation metal materials and / or heat insulation non-metal materials (for example, heat insulation ceramic, heat insulation glass, etc.). The heat insulation inner pipe 52 and the heat insulation outer pipe 51 can be made of the same material or different materials.

[0050] In some embodiments, the heat insulation pipe 50 can further include a first sealing member 53 and a second sealing member 54 respectively sealing two axial ends of the heat insulation cavity 510. The first sealing member 53 and the second sealing member 54 can be made of materials having a low thermal conductivity and good sealing performance, such as heat insulation silica gel.

[0051] The first sealing member 53 is blocked at an upper end of the heat insulation cavity 510, that is, an end of the heat insulation cavity 510 close to the socket 1110. The first sealing member 53 is annular, an inner wall surface of the first sealing member 53 is sealingly matched with an outer wall surface of an upper end of the heat insulation inner pipe 52, and an outer wall surface of the first sealing member 53 is sealingly matched (for example, interference fit) with an inner wall surface of an upper end of the heat insulation outer pipe 51, thereby sealingly blocking the upper end of the heat insulation cavity 510.

[0052] Upper end surfaces of the heat insulation inner pipe 52, the heat insulation outer pipe 51 and the first sealing member 53 are flush. Of course, in other embodiments, the upper end surfaces of the heat insulation inner pipe 52, the heat insulation outer pipe 51 and the first sealing member 53 can also not be flush, for example, the upper end surface of the heat insulation inner pipe 52 can be higher or lower than the upper end surface of the heat insulation outer pipe 51.

[0053] The second sealing member 54 is blocked at a lower end of the heat insulation cavity 510, that is, an end of the heat insulation cavity 510 away from the socket 1110. The second sealing member 54 is annular, an inner wall surface of the second sealing member 54 is sealingly matched with an outer wall surface of a lower end of the heat insulation inner pipe 52, and an outer wall surface of the second sealing member 54 is sealingly matched (for example, interference fit) with an inner wall surface of a lower end of the heat insulation outer pipe 51, thereby sealingly blocking the lower end of the heat insulation cavity 510.

[0054] The lower end surface of the inner heat-insulating tube 52, the outer heat-insulating tube 51 and the second sealing member 54 are flush. Of course, in other embodiments, the lower end surfaces of the inner heat-insulating tube 52, the outer heat-insulating tube 51 and the second sealing member 54 can not be flush, for example, the lower end surface of the inner heat-insulating tube 52 can be higher or lower than the lower end surface of the outer heat-insulating tube 51.

[0055] Of course, in other embodiments, the two ends of the heat-insulating cavity 510 can also be sealed by other known manners. For example, the two ends of the inner heat-insulating tube 52 and the outer heat-insulating tube 51 can be welded or glued together to seal the two ends of the heat-insulating cavity 510. For another example, the heat-insulating tube 50 can be an integrated structure formed by sintering or the like.

[0056] The outer heat-insulating tube 51 has a first end surface 501 (shown as an upper end surface) close to the insertion port 1110 and a second end surface 502 (shown as a lower end surface) away from the insertion port 1110. At least one of the first end surface 501 and the second end surface 502 is suspended, i.e., does not directly contact other structural members outside the heat-insulating tube 50, so as to reduce the heat transferred outward by the end surface of the outer heat-insulating tube 51 in a thermal contact conduction manner, and improve the heat-insulating effect.

[0057] Since the first end surface 501 of the outer heat-insulating tube 51 is closer to the top wall 111 of the shell 10, the first end surface 501 of the outer heat-insulating tube 51 is preferably suspended. Preferably, both the first end surface 501 and the second end surface 502 of the outer heat-insulating tube 51 are suspended, and the heat-insulating effect is better. Of course, in other embodiments, the outer heat-insulating tube 51 can be suspended only at the second end surface 502 or the first end surface 501.

[0058] In some embodiments, the outer heat-insulating tube 51 has a first fixing position 511 on the outer side, and the heat-insulating tube 50 is fixed in the shell 10 through the first fixing position 511. In the axial direction of the outer heat-insulating tube 51, the distance L1 between the first fixing position 511 and the first end surface 501 is greater than 0, and the distance L2 between the first fixing position 511 and the second end surface 502 is also greater than 0.

[0059] The insulated outer tube 51 contacts the housing 10 through the first fixing portion 511 (i.e., the insulated outer tube 51 is directly fixed to the housing 10), or contacts other structural components within the housing 10 (i.e., the insulated outer tube 51 is fixed to the housing 10 through other structural components), thereby transferring heat to the housing 10 through the first fixing portion 511. Herein, the distance L1 between the first fixing portion 511 and the first end face 501 refers to the closest distance at which the first end face 501 is in thermal contact and conduction with the housing 10 or other structural components through the first fixing portion 511; the distance L2 between the first fixing portion 511 and the second end face 502 refers to the closest distance at which the second end face 502 is in thermal contact and conduction with the housing 10 or other structural components through the first fixing portion 511.

[0060] Heat from the receiving tube 30 is first radiated to the insulated inner tube 52. However, because the insulated chamber 510 is a vacuum, its thermal conductivity is lower than that of the insulated inner tube 52. A small portion of the heat transferred to the insulated inner tube 52 is radiated through the insulated chamber 510 to the insulated outer tube 51. The remaining heat is conducted to the ends of the insulated inner tube 52 and then to the insulated outer tube 51. Because the portion of the insulated outer tube 51 between the two ends has a longer conduction path from the heat source, the heat output is relatively low. By positioning the first fixing portion 511 between the two end surfaces of the insulated outer tube 51 and at a certain distance from both end surfaces, the heat output at the first fixing portion 511 is lower, thereby reducing the amount of heat conducted from the first fixing portion 511 to the housing 10.

[0061] It is understood that the farther the first fixing point 511 is from the two end surfaces of the insulating outer tube 51, the lower the heat. In some embodiments, the distance L1 between the first fixing point 511 and the first end surface 501 is greater than or equal to 2 mm, and the distance L2 between the first fixing point 511 and the second end surface 502 is greater than or equal to 2 mm, which can achieve a better thermal insulation effect.

[0062] In some embodiments, L1 or L2 can be 1 / 3 to 2 / 3 of the total axial length of the insulated outer tube 51. Preferably, the first fixing point 511 can be located in the axial center of the insulated outer tube 51. That is, the distance L1 between the first fixing point 511 and the first end surface 501 is equal to the distance L2 between the first fixing point 511 and the second end surface 502. Of course, in other embodiments, L1 can also be greater than or less than L2.

[0063] The first fixing portion 511 can be concave or convex on the outer wall of the insulated outer tube 51. A second fixing portion 121 is formed within the housing 10 to cooperate with the first fixing portion 511. The second fixing portion 121 engages with the first fixing portion 511, thereby securing the insulated tube 50 within the housing 10. Here, "inward" refers to a direction toward the central axis of the accommodating chamber 310, and "outward" refers to a direction away from the central axis of the accommodating chamber 310.

[0064] In some embodiments, the first fixing portion 511 is annular and may be an annular groove formed by an inwardly concave outer wall of the thermally insulated outer tube 51. Accordingly, the second fixing portion 121 is a rib protruding inward from the inner wall of the housing 10. The second fixing portion 121 may include a single annular rib or may include multiple ribs spaced apart circumferentially.

[0065] Of course, in other embodiments, the first fixing portion 511 may also be an annular protrusion formed by the outer wall of the thermally insulated outer tube 51 convexly outwardly, and correspondingly, the second fixing portion 121 may be a bone groove formed by the inner wall of the housing 10 concavely outwardly. In other embodiments, the first fixing portion 511 may also include a plurality of grooves or protrusions evenly spaced around the circumference of the thermally insulated outer tube 51.

[0066] In some embodiments, the housing 10 may include an outer shell 11 and an inner shell 12 disposed within the outer shell 11. A second fixing portion 121 is formed on the inner shell 12.

[0067] Furthermore, the inner shell 12 includes a first inner shell 123 and a second inner shell 124 that fit together and secure the insulated tube 50 from both sides. Specifically, the second securing portion 121 includes a first portion 1211 formed on the first inner shell 123 and a second portion 1212 formed on the second inner shell 124. Both the first portion 1211 and the second portion 1212 can be roughly semi-annular in shape. The first portion 1211 on the first inner shell 123 and the second portion 1212 on the second inner shell 124 respectively engage with the first securing portion 511 of the insulated tube 50 from both sides. The first and second portions 1211, 1212 are joined to form the annular second securing portion 121, facilitating assembly.

[0068] The outer shell 11 is sleeved on the inner shell 12 to play a decorative and protective role, and can also fix the first inner shell 123 and the second inner shell 124.

[0069] In some embodiments, a limiting portion 122 may also be formed in the shell 10, and there is zero gap or a small gap between the limiting portion 122 and the outer wall surface of the insulating outer tube 51, that is, the limiting portion 122 is in contact with the outer wall surface of the insulating outer tube 51 or has a gap fit, which is used to prevent the insulating tube 50 from swinging.

[0070] The limiting portion 122 and the second fixing portion 121 are spaced apart in the axial direction of the thermally insulated outer tube 51, and the limiting portion 122 is located below the second fixing portion 121, that is, the limiting portion 122 is further away from the first end surface 501 relative to the second fixing portion 121. Of course, in other embodiments, the limiting portion 122 may also be located above the second fixing portion 121, that is, the limiting portion 122 is closer to the first end surface 501 relative to the second fixing portion 121.

[0071] Here, the insulated outer tube 51 only makes direct contact with the inner shell 12 at the first fixed position 511 and the position corresponding to the limit portion 122. No other positions of the insulated outer tube 51 will make direct contact with the inner shell 12 or other structural parts, thereby greatly reducing heat transfer to the shell 10 through thermal contact conduction and improving the thermal insulation effect of the insulated tube 50.

[0072] Of course, in other embodiments, the limiting portion 122 may not be formed within the housing 10. The thermally insulated outer tube 51 only directly contacts the inner housing 12 at the first fixed position 511, and no other positions of the thermally insulated outer tube 51 directly contact the inner housing 12 or other structural components. In other embodiments, the number of limiting portions 122 is not limited to one. For example, there may be two limiting portions 122, each disposed above and below the second fixed position 121.

[0073] In this embodiment, the limiting portion 122 is formed by a protrusion from the inner wall of the inner shell 12, and may include a first limiting protrusion 1221 protruding inwardly from the inner wall of the first inner shell 123 and a second limiting protrusion 1222 protruding inwardly from the inner wall of the second inner shell 124. The first limiting protrusion 1221 and the second limiting protrusion 1222 may both be roughly semi-annular in shape and, when assembled, form the annular limiting portion 122.

[0074] It can be understood that in other embodiments, the limiting portion for preventing the thermal insulation tube 50 from swinging can also be formed by the outer wall surface of the thermal insulation outer tube 51 protruding outward.

[0075] In some embodiments, the heating body 90 further includes at least one insulation layer 40 disposed between the insulation tube 50 and the receiving tube 30. The outer surface of the at least one insulation layer 40 does not contact the inner surface of the insulation inner tube 52, which is beneficial to improving the insulation effect.

[0076] In some embodiments, the at least one thermal insulation layer 40 includes an aerogel thermal insulation layer 41 and a thermal insulation support tube 42 disposed around the aerogel thermal insulation layer 41. The aerogel thermal insulation layer 41 is filled between the receiving tube 30 and the thermal insulation support tube 42 to reduce heat transfer from the receiving tube 30 to the thermal insulation support tube 42.

[0077] The insulating support tube 42 is tubular and is positioned over the aerogel insulation layer 41, providing support and insulation. It can be a PEEK tube made of PEEK material. The outer diameter of the insulating support tube 42 is smaller than the inner diameter of the insulating inner tube 52, ensuring that the outer surface of the insulating support tube 42 and the inner surface of the insulating inner tube 52 are spaced apart and do not contact each other, thereby reducing heat transfer from the insulating support tube 42 to the insulating inner tube 52. Of course, in other embodiments, the insulating support tube 42 can also be made of other insulating materials, such as insulating ceramics, insulating glass, or insulating metal.

[0078] In some embodiments, an isolation layer 33 may be further provided between the receiving tube 30 and the aerogel insulation layer 41 . The isolation layer 33 separates the heating layer 32 of the receiving tube 30 from the aerogel insulation layer 41 , thereby protecting the heating layer 32 .

[0079] It is understandable that in other embodiments, the aerogel insulation layer 41 may not be provided between the receiving tube 30 and the insulation support tube 42 , and a cavity structure may be provided between the receiving tube 30 and the insulation support tube 42 to provide insulation.

[0080] In some embodiments, the heating body 90 further includes a heating seat 60 and a heating cover 70 respectively disposed at both ends of the receiving tube 30. The heating seat 60 and the heating cover 70 can be made of low thermal conductivity materials, such as insulating ceramics, to reduce the heat transferred outward from both ends of the receiving tube 30.

[0081] The heating seat 60 is arranged at the lower end of the receiving tube 30 and is used to support the receiving tube 30. The heating seat 60 may also be formed with an air inlet channel 630 for allowing external air to enter the accommodating chamber 310. The air inlet channel 630 is connected to the bottom of the accommodating chamber 310 and can be coaxially arranged with the accommodating chamber 310, but is not limited to a coaxial arrangement. When the aerosol generating medium is inserted into the accommodating chamber 310, the external air flow can enter the bottom of the aerosol generating medium along the air inlet channel 630. The aerosol generating medium is heated to generate an aerosol. Under the load of negative pressure from the user's inhalation, the smoke is inhaled by the user.

[0082] In some embodiments, the heating base 60 may be hollow and cylindrical, and may include, from top to bottom, a first base body 61, a second base body 62, and an airway portion 63. The outer and inner diameters of the first base body 61, the second base body 62, and the airway portion 63 decrease in order. The inner wall of the airway portion 63 defines an air inlet passage 630.

[0083] The lower end of the receiving tube 30 can be inserted into the first seat body 61. In some embodiments, a heat insulation member 82 can be further arranged between the receiving tube 30 and the heat generating seat 60. The heat insulation member 82 can be made of a sealing material with high temperature resistance and low thermal conductivity, for example, heat insulation silica gel. The outer wall surface of the lower end of the receiving tube 30 can be tightly fitted (for example, interference fitted) with the inner wall surface of the first seat body 61, so as to fix the receiving tube 30 in the first seat body 61 and achieve heat insulation between the receiving tube 30 and the first seat body 61. The lower end surface of the heat insulation support tube 42 can abut against the step surface 611 formed between the first seat body 61 and the second seat body 62.

[0084] The lower end of the heat insulation support tube 42 is sleeved on the first seat body 61 and fixed thereto. The outer wall surface of the first seat body 61 can further be formed with at least one boss 612 for limiting the lower end surface of the heat insulation support tube 42. In the present embodiment, the boss 612 has two and is arranged on the two radial sides of the first seat body 61.

[0085] The second seat body 62 and the air passage portion 63 form a step surface 621, and the bottom of the aerosol generating medium can abut against the step surface 621 after the aerosol generating medium is inserted into the accommodation cavity 310. The inner diameter of the second seat body 62 can match the outer diameter of the aerosol generating medium, so as to support and fix the aerosol generating medium through the second seat body 62.

[0086] The outer wall surface of the air passage portion 63 can be protruded to form a limiting step 631, and the inner wall surface of the inner shell 12 can be protruded to form a support rib 125, and the limiting step 631 can abut against the support rib 125, so as to support and fix the heat generating seat 60 in the inner shell 12.

[0087] The bottom of the shell 10 is provided with at least one air inlet hole 1140 which is in communication with the air inlet channel 630. In the present embodiment, the shell 10 further comprises an air passage plug 114 which is embedded on the bottom wall 113 of the outer shell 11. The air passage plug 114 comprises a cover portion 1142 and a plug portion 1141 which extends upwardly from the upper end surface of the cover portion 1142. The plug portion 1141 extends into the air passage portion 63, and the outer diameter of the plug portion 1141 is smaller than the inner diameter of the air passage portion 63, so that an air flow gap for air flow is formed between the outer wall surface of the plug portion 1141 and the inner wall surface of the air passage portion 63, and the air flow entering through the air inlet hole 1140 can flow into the air inlet channel 630 through the air flow gap.

[0088] The cover portion 1142 is embedded on the bottom wall 113, and the outer diameter of the cover portion 1142 is larger than the outer diameter of the plug portion 1141. The air inlet hole 1140 has a plurality of air inlet holes 1140 which are penetratingly arranged on the cover portion 1142, and the plurality of air inlet holes 1140 are arranged at the periphery of the plug portion 1141. Through the above structure, the condensate in the air inlet channel 630 can be reduced to directly flow out under the action of gravity.

[0089] Of course, in other embodiments, the airway plug 114 and the bottom wall 113 may also be integrally formed. In other embodiments, the air inlet 1140 may also be formed in other locations of the housing 10. For example, the air inlet 1140 may also be provided on the side wall of the housing 10, and the airway portion 63 may be bent to connect the air inlet channel 630 to the air inlet 1140.

[0090] The heating cover 70 is cylindrical with two through-holes, and may include a first cylindrical portion 71 at the bottom and a second cylindrical portion 72 at the top. The inner and outer diameters of the second cylindrical portion 72 may be smaller than those of the first cylindrical portion 71. The upper end of the receiving tube 30 may be disposed within the first cylindrical portion 71, with the upper end surface of the receiving tube 30 abutting against the upper end surface of the first cylindrical portion 71.

[0091] In some embodiments, the receiving tube 30 and the heating cover 70 may be provided with a heat insulating member 81. The heat insulating member 81 may be made of a sealing material that is resistant to high temperatures and has low thermal conductivity, for example, heat insulating silicone. The outer wall surface of the upper end of the receiving tube 30 can be tightly fitted (for example, interference fit) with the inner wall surface of the first barrel portion 71 through the heat insulating member 81, thereby achieving fixation of the receiving tube 30 in the first barrel portion 71 and achieving heat insulation between the receiving tube 30 and the first barrel portion 71. The upper end surface of the heat insulating member 81 can be against the upper end surface of the first barrel portion 71. The upper end of the heat insulating support tube 42 can be sleeved on the first barrel portion 71 and fixed.

[0092] The inner diameter of the second barrel portion 72 may match the outer diameter of the aerosol-generating medium, thereby fixing the aerosol-generating medium. Of course, in other embodiments, the inner diameter of the second barrel portion 72 may also be larger than the outer diameter of the aerosol-generating medium.

[0093] It can be understood that the above technical features can be used in any combination without limitation.

[0094] The above embodiments only express the specific implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An aerosol generating device, characterized in that include: A housing (10), one end of the housing (10) having a socket (1110) for inserting an aerosol-generating medium; a receiving tube (30) disposed in the housing (10), wherein a receiving cavity (310) is formed for receiving at least a portion of the aerosol generating medium; and The heat insulation tube (50) is arranged on the periphery of the receiving tube (30). The heat-insulating tube (50) comprises a heat-insulating inner tube (52) and a heat-insulating outer tube (51) arranged on the periphery of the heat-insulating inner tube (52), and a heat-insulating cavity (510) is formed between the heat-insulating inner tube (52) and the heat-insulating outer tube (51). The heat-insulating outer tube (51) has a first end surface (501) close to the socket (1110) and a second end surface (502) away from the socket (1110), and at least one of the first end surface (501) and the second end surface (502) is suspended.

2. The aerosol generating device according to claim 1, wherein The first end surface (501) is suspended.

3. The aerosol generating device according to claim 1, wherein The first end surface (501) and the second end surface (502) are both suspended.

4. The aerosol generating device according to claim 1, wherein The heat-insulating cavity (510) is a vacuum cavity.

5. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The outer side of the heat-insulating outer tube (51) has a first fixing position (511), and the heat-insulating outer tube (51) is fixed in the shell (10) via the first fixing position (511). The distance between the first fixing position (511) and the first end surface (501) is greater than or equal to 2 mm, and the distance between the first fixing position (511) and the second end surface (502) is greater than or equal to 2 mm.

6. The aerosol generating device according to claim 5, characterized in that The first fixing position (511) is provided in a concave or convex manner along the circumference of the outer wall of the heat-insulating outer tube (51). A second fixing position (121) is formed in the housing (10) and is engaged with the first fixing position (511).

7. The aerosol generating device according to claim 6, wherein: The first fixing position (511) is an annular groove provided along the circumference of the outer wall of the heat-insulating outer tube (51). The shell (10) includes a first inner shell (123) and a second inner shell (124); the second fixing position (121) includes a first portion (1211) protruding from the inner wall surface of the first inner shell (123) and a second portion (1212) protruding from the inner wall surface of the second inner shell (124); the first portion (1211) and the second portion (1212) are respectively inserted into the first fixing position (511) from both sides of the thermal insulation outer tube (51).

8. The aerosol generating device according to claim 6, wherein: A limiting portion (122) is formed by protruding from the shell (10), and the limiting portion (122) and the second fixed portion (121) are spaced apart in the axial direction of the heat-insulating outer tube (51). The limiting portion (122) contacts or is clearance-fitted with the outer wall surface of the heat-insulating outer tube (51).

9. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The aerosol generating device further comprises at least one heat insulating layer (40) disposed between the heat insulating inner tube (52) and the receiving tube (30).

10. The aerosol generating device according to claim 9, characterized in that The at least one thermal insulation layer (40) comprises an aerogel thermal insulation layer (41) wrapped around the receiving tube (30) and a thermal insulation support tube (42) sleeved outside the aerogel thermal insulation layer (41), wherein the outer wall surface of the thermal insulation support tube (42) is spaced apart from the inner wall surface of the thermal insulation inner tube (52).

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