Aerosol generating device and heating assembly thereof

Abstract

The utility model relates to an aerosol generating device and a heating assembly thereof, and the heating assembly comprises a matrix tube structure and a heating structure disposed on the outer side surface of the matrix tube structure. The heating structure comprises a substrate layer, at least four heating units arranged on the inner side face of the substrate layer and at least five conductive units arranged on the outer side face of the substrate layer and electrically connected with the at least four heating units, and the at least four heating units are arranged in the axial direction of the substrate tube structure at intervals. The at least one heating unit extends non-linearly in the circumferential direction of the base body pipe structure. The at least four heating units and the at least five conductive units are arranged on different sides of the substrate layer, so that the arrangement area of the heating units can be increased, the heating consistency is improved, and the overall energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aerosol generation technology, and in particular to an aerosol generation device and its heating component. Background Technology

[0002] Aerosol generating devices are used to heat aerosol-generating products (such as tobacco products) to produce aerosols for users to inhale. The heating element in related aerosol generating devices is typically formed using a thick-film processing technique, and heating is achieved by configuring the heating element as a two-stage heating unit. However, the two-stage heating element still suffers from problems such as poor product inhalation consistency and insufficient head-inhalation bursts. Furthermore, due to limitations in current technology, it is difficult to achieve uniform heating film thickness throughout, leading to discrepancies between the actual thermal field and the design (obvious hot spots appear where the heating film is thinner). Utility Model Content

[0003] This invention provides an improved heating component and further provides an improved aerosol generating device to solve the above-mentioned technical problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a heating component, including a base tube structure and a heating structure disposed on the outer side of the base tube structure.

[0005] The heating structure includes a base layer, at least four heating units disposed on the inner side of the base layer, and at least five conductive units disposed on the outer side of the base layer and electrically connected to the at least four heating units.

[0006] The at least four heating units are arranged at intervals along the axial direction of the base tube structure, and at least one of the heating units extends non-linearly along the circumferential direction of the base tube structure.

[0007] In some embodiments, each heating unit includes a heating body and a first electrode and a second electrode located at both ends of the heating body, wherein the first electrode and the second electrode are electrically connected to two conductive units respectively.

[0008] The first electrode and the second electrode of each heating unit are staggered in the circumferential direction of the substrate tube structure.

[0009] At least one of the conductive units includes a conductive connection portion and a heat-spreading portion connected to the conductive connection portion.

[0010] In some embodiments, the base layer is wound around the matrix tube structure.

[0011] At the location corresponding to the winding joint of the base layer, a blank area without the heating unit is formed on the base tube structure.

[0012] The blank area has a first side and a second side that are opposite each other in the circumferential direction, and the first electrode is close to the first side of the blank area.

[0013] In some embodiments, the heating element includes a first portion connected to the first electrode, a second portion connected to the second electrode, and a third portion connecting the first portion and the second portion.

[0014] The first part and the second part are wound in opposite directions in the circumferential direction of the base tube structure.

[0015] The third part is located near the second side of the blank area.

[0016] In some embodiments, the heating component has a first end near the suction end of the aerosol generating device and a second end opposite to the first end.

[0017] The second portion of each of the heating units extends in a straight line along the circumference of the base tube structure.

[0018] The first portion of one of the heating units near the first end extends linearly or non-linearly along the circumferential direction of the base tube structure, while the first portions of the other heating units extend non-linearly along the circumferential direction of the base tube structure.

[0019] In some embodiments, the projection of the heat spreader onto the substrate tube structure covers at least a portion of the blank area.

[0020] In some embodiments, the heat spreader includes at least four heat spreader sections, the projections of which on the substrate tube structure respectively cover a portion of the at least four heating units.

[0021] In some embodiments, the height of each of the heat-spreading sections in the axial direction of the base tube structure is equivalent to the height of the corresponding heating unit in the axial direction of the base tube structure.

[0022] In some embodiments, the first electrode of each of the at least four heating units is electrically connected to one of the conductive units, and the second electrode of each of the at least four heating units is electrically connected to the other at least four conductive units.

[0023] In some embodiments, each of the conductive units is provided with a solder pad.

[0024] The heating element has a first end near the suction end of the aerosol generating device and a second end opposite to the first end.

[0025] The pad is located near the second end of the heating element and the distance between the pad and the end face of the second end is 1.0mm to 3.0mm.

[0026] This invention also provides an aerosol generating device, including a heating component as described in any of the above claims and a control circuit connected to the heating component.

[0027] The aerosol generating device and its heating component of this utility model have at least the following beneficial effects: by arranging at least four heating units and at least five conductive units on different sides of the substrate layer, the installation area of ​​the heating units can be increased, the heating consistency can be improved, and the overall energy consumption can be reduced. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0029] Figure 1 This is a three-dimensional structural schematic diagram of the aerosol generation system in some embodiments of this utility model;

[0030] Figure 2 This is a three-dimensional structural diagram of the heating component in the first embodiment of this utility model;

[0031] Figure 3 yes Figure 2 A schematic diagram of the longitudinal cross-sectional structure of the heating component shown.

[0032] Figure 4 yes Figure 2 The exploded structural diagram of the heating component is shown.

[0033] Figure 5 yes Figure 4 An exploded view of the heating structure of the heating component shown.

[0034] Figure 6 yes Figure 5 A schematic diagram of the distribution structure of the heating unit on the sheet-like substrate layer;

[0035] Figure 7 yes Figure 5 A schematic diagram of the distribution structure of the conductive units on the sheet-like substrate;

[0036] Figure 8 yes Figure 2 The side view of the heating component shown with the base layer and conductive layer hidden;

[0037] Figure 9 yes Figure 2The heating element shown is viewed from the other side when the base layer and conductive layer are hidden.

[0038] Figure 10 A partial cross-sectional view is shown in some embodiments of the present invention, showing the connection between the conductive unit of the heating component and the heating unit.

[0039] Figure 11 This is a three-dimensional structural diagram of the heating component in the second embodiment of this utility model;

[0040] Figure 12 yes Figure 11 An exploded view of the heating structure of the heating component shown.

[0041] Figure 13 yes Figure 11 An exploded view of the heating structure of the heating component shown from another direction.

[0042] Figure 14 yes Figure 13 A schematic diagram of the distribution structure of the heating unit on the sheet-like substrate layer;

[0043] Figure 15 yes Figure 13 A schematic diagram of the distribution structure of the conductive units on the sheet-like substrate;

[0044] Figure 16 yes Figure 11 A longitudinal cross-sectional view of the heating structure of the heating component shown.

[0045] Figure 17 This is a three-dimensional structural diagram of the heating component in the third embodiment of this utility model. Detailed Implementation

[0046] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0047] The terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, four, etc., unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] Figure 1 An aerosol generation system 1 according to some embodiments of the present invention is shown. The aerosol generation system 1 may include an aerosol generation device 100 and an aerosol generation article 200. The aerosol generation article 200 is movably inserted into the aerosol generation device 100, facilitating removal and replacement with a new aerosol generation article 200 after heating is complete. The aerosol generation device 100 can heat the aerosol generation article 200 inserted therein after being powered on, to release the aerosol extract in the aerosol generation article 200 in a non-combustible state.

[0052] In some embodiments, the aerosol generating article 200 may be cylindrical. Of course, in other embodiments, the aerosol generating article 200 may also be elliptical, polygonal, or other columnar shapes. The aerosol generating article 200 includes an aerosol generating matrix 210, which may include solid materials in the form of strips, flakes, or granules 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.

[0053] The aerosol generating device 100 may include a housing 20 and a heating element 10 disposed within the housing 20. One end of the housing 20 has a socket 21 for inserting an aerosol generating article 200. The shape of the socket 21 is adapted to the cross-sectional shape of the aerosol generating article 200; for example, the socket 21 is circular. Of course, the socket 21 may also be circular or other shapes, as long as it allows the aerosol generating article 200 to pass through.

[0054] The heating element 10 is used to heat the aerosol generating article 200, which is at least partially inserted into the aerosol generating device 100, after being powered on.

[0055] In some embodiments, the aerosol generating device 100 further includes a battery cell 30 and a circuit board 40 disposed in the housing 20. The circuit board 40 is provided with a control circuit, which is electrically connected to both the battery cell 30 and the heating element 10 to control the power supply between the battery cell 30 and the heating element 10. Furthermore, the control circuit can also control the power output of the battery cell 30 to the heating element 10.

[0056] The heating method used by the heating component 10 is not limited. For example, it can be one or more of the following: resistance heating, electromagnetic heating, infrared heating, laser heating, microwave heating, etc.

[0057] Figures 2 to 9 The heating element 10 in the first embodiment of the present invention is shown. The heating element 10 is tubular, such as cylindrical, and has a channel 110 formed therein. The aerosol generating article 200 can be at least partially housed in the channel 110, and the heating element 10 heats the aerosol generating article 200 housed therein after being energized.

[0058] In some embodiments, the heating element 10 can be a hollow structure with both ends open. Specifically, the heating element 10 has a first end 101 and a second end 102 arranged opposite each other in the axial direction. The first end 101 (shown as the upper end) is the end near the insertion port 21 (i.e., near the suction end of the aerosol generating device 100), and the second end 102 (shown as the lower end) is the end away from the insertion port 21. The first end 101 of the heating element 10 has an opening through which the aerosol generating article can be inserted into the channel 110.

[0059] The second end 102 of the heating element 10 may also have an opening. Of course, in other embodiments, the second end 102 of the heating element 10 may also be provided with a bottom wall, which can be used for the aerosol generating article 200 to be positioned against.

[0060] The heating component 10 may include a base tube structure 17 and a heating structure 16 of the base tube structure 17. The heating structure 16 may be disposed on the inner and / or outer surfaces of the base tube structure 17, and is capable of converting electrical energy into heat energy to heat the aerosol-generated article contained in the heating component 10.

[0061] In some embodiments, the heating structure 16 may be disposed on the outer surface of the base tube structure 17. The base tube structure 17 includes a base tube 11, which may be made of a material with high thermal conductivity to better transfer the heat from the heating structure 16 to the aerosol-generating article. In some embodiments, the base tube 11 may be made of a metallic material, such as stainless steel (e.g., 430 or 316L), aluminum, aluminum alloy, etc. Metallic materials have advantages such as high thermal conductivity, low cost, and high strength.

[0062] Accordingly, the base tube structure 17 also includes an isolation layer 12 disposed between the base tube 11 and the heating structure 16, which insulatingly separates the base tube 11 from the heating structure 16. The isolation layer 12 can be made of an insulating material with a high thermal conductivity to better transfer the heat from the heating structure 16 to the aerosol-generated product. The isolation layer 12 can be an insulating glaze layer (such as a glass glaze layer), which can be prepared by dip coating sintering or other methods. In addition, by providing the isolation layer 12, the strength of the base tube 11 can be improved, which is beneficial for the thinning design of the base tube 11. Understandably, in other embodiments, an isolation layer can also be provided on the inner surface of the base tube 11.

[0063] In some embodiments, the thickness of the isolation layer 12 can be 10 μm to 50 μm (including both ends), for example, 20 μm to 30 μm. The thickness of the base tube 11 can be 0.1 mm to 0.15 mm (including both ends), which allows for miniaturization of the base tube 11 while ensuring support strength. The axial length H1 of the base tube 11 can be 16 mm to 25 mm (including both ends), for example, approximately 21 mm.

[0064] Of course, in other embodiments, the substrate tube 11 may also be made of an insulating material with a high thermal conductivity, such as ceramic materials (e.g., zirconium oxide), quartz glass, or other non-metallic materials. Thus, the substrate tube structure 17 may or may not include an insulating layer 12.

[0065] In other embodiments, the heating structure 16 may also be disposed on the inner side of the base tube 11. Accordingly, the base tube 11 may be made of a material with a low thermal conductivity, which is beneficial to reduce the heat diffused outward by the heating structure 16 and reduce heat loss.

[0066] In some other embodiments, the heating structure 16 may be partially disposed on the outer side of the base tube 11 and partially disposed on the inner side of the base tube 11. For example, the heating structure 16 may include a resistive heating unit disposed on the outer side of the base tube 11 and an infrared layer disposed on the inner side of the base tube 11.

[0067] The base tube 11 may include a main body 111 and a flared portion 112 disposed at one end of the main body 111. The flared portion 112 and the main body 111 may be coaxially arranged from the first end 101 to the second end 102. The aerosol generating article can be smoothly inserted into the main body 111 through the flared portion 112.

[0068] The cross-sectional area of ​​the flared portion 112 gradually decreases from the first end 101 to the second end 102. Furthermore, the flared portion 112 and the main body 111 can be smoothly connected, facilitating the insertion of the aerosol-generated article and making it easy to process and shape. The flared portion 112 can be formed with rounded corners or beveled openings; in other words, the inner wall surface of the flared portion 112 can be an arc surface or a beveled surface. Of course, in other embodiments, the inner wall surface of the flared portion 112 can also be partially an arc surface and partially a beveled surface.

[0069] In some embodiments, the cross-sections of the flared portion 112 and the main body portion 111 can be circular. The inner diameter of the flared portion 112 gradually decreases in the direction from the first end 101 to the second end 102, and the inner diameter of the main body portion 111 is equal to the inner diameter of the proximal end (the end closest to the flared portion 112) of the flared portion 112. Furthermore, the outer diameter of the flared portion 112 also gradually decreases in the direction from the first end 101 to the second end 102, and the outer diameter of the main body portion 111 is equal to the outer diameter of the proximal end of the flared portion 112.

[0070] In some embodiments, the inner diameter φ1 of the distal end (the end furthest from the flared portion 112) of the flared portion 112 is 0.5 mm to 0.25 mm larger than the inner diameter φ2 of the main body portion 111 (including both endpoints). That is, the inner diameter φ1 of the first end 101 of the flared portion 112 is 0.5 mm to 0.25 mm larger than the inner diameter of the proximal end of the flared portion 112 (including both endpoints). For example, φ1 is approximately 5.55 mm and φ2 is approximately 6.05 mm. The height (axial length) H2 of the flared portion 112 can be 0.3 mm to 1.2 mm (including both endpoints), for example, 0.5 ± 0.1 mm. The compact design of the flared portion 112 facilitates the installation and sealing of the heating component 10 within the housing 20.

[0071] The heating structure 16 is disposed on the outside of the insulating layer 12. The heating structure 16 may include a base layer 14, at least one heating unit 13 disposed on the inner side of the base layer 14, and at least two conductive units 15 disposed on the outer side of the base layer 14.

[0072] Each heating unit 13 is electrically connected to two conductive units 15, and then electrically connected to a control circuit. Specifically, each heating unit 13 includes a heating body 131 and two electrodes (a first electrode 132 and a second electrode 133) located at both ends of the heating body 131. Each heating unit 13 is electrically connected to the two conductive units 15 through the first electrode 132 and the second electrode 133, respectively.

[0073] The first electrode 132 and the second electrode 133 of each heating unit 13 can be staggered in the circumferential direction (circumferential direction of the base tube 11) of the heating assembly 10. Of course, in other embodiments, the first electrode 132 and the second electrode 133 of each heating unit 13 can also be staggered in the axial direction of the heating assembly 10, or the first electrode 132 and the second electrode 133 of each heating unit 13 can also be staggered in both the circumferential and axial directions of the heating assembly 10.

[0074] The substrate layer 14 is made of an insulating material. In some embodiments, the substrate layer 14 can be a glass film strip or a ceramic film strip formed by casting or other methods. The thickness of the substrate layer 14 can be 90 μm to 160 μm (including the two ends), preferably 110 μm to 140 μm.

[0075] The base layer 14 serves as insulation and protection. The base layer 14 can support the heating unit 13 and the conductive unit 15 and insulate them from each other. It can also isolate the heating unit 13 from the outside air, thereby reducing the corrosive effect of oxygen and impurities on the heating unit 13.

[0076] The connection between at least one heating element 13 and at least two conductive elements 15 can be achieved by drilling holes in the substrate layer 14. Specifically, as Figure 10 As shown, a through hole 140 can be formed on the base layer 14 along its thickness direction, and the heating unit 13 and the conductive unit 15 can be connected through the through hole 140.

[0077] The heating unit 13 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 13 may include a metallic material, or a mixture of a metallic material and a non-metallic material (e.g., glass). At least two conductive units 15 are used to connect to an external control circuit, thereby connecting at least one heating unit 13 to the external control circuit. The conductive units 15 can be connected to the external circuit via electrode connection structures such as electrode leads, conductive sheets, and conductive posts.

[0078] By placing the heating unit 13 and the conductive unit 15 on different sides of the base layer 14, the placement space of at least one heating unit 13 can be increased, the heating area can be increased, the heating consistency can be improved, and the suction taste consistency can be improved.

[0079] The heating element 13 can be a heating film formed by screen printing or deposition. Of course, in other embodiments, the heating element 13 can also be a mesh, array or fabric formed of conductive wires or conductive sheets.

[0080] The conductive unit 15 can be a conductive film, such as a conductive metal film (e.g., a copper film or a silver film) or a non-metallic film formed on the substrate layer 14 by screen printing. It is understood that in other embodiments, the conductive unit 15 is not limited to being formed on the substrate layer 14 by screen printing, but can also be fixed to the substrate layer 14 by adhesive bonding or by soldering.

[0081] In some embodiments, the conductive unit 15 may also have a high thermal conductivity. For example, the conductive unit 15 may be made of pure silver. With appropriate shape design, it can also play a role in heat equalization, thereby reducing the temperature difference of the heating unit 13 and equalizing the heat.

[0082] For example Figures 2 to 9 As shown, in some embodiments, there are multiple heating units 13 (e.g., two, three, or more). Each heating unit 13 is electrically connected to a control circuit. Alternatively, multiple heating units 13 can be electrically connected to the control circuit in parallel, and the control circuit can control the energization or de-energization of each heating unit 13 individually. The shapes of the heating units 13 can be the same or different.

[0083] Multiple heating units 13 can be arranged at intervals along the axial and / or circumferential directions of the heating component 10, enabling zoned heating of the aerosol generating matrix. This results in more concentrated local energy in the aerosol generating matrix, faster smoke generation, shorter preheating time, reduced energy consumption, a smaller maximum discharge current for the battery cell, and easier battery cell selection. Compared to a single heating unit 13, the matrix area corresponding to each heating unit 13 is smaller with multiple heating units 13, resulting in a more uniform temperature field in the heating area and thus improving the inhalation experience of the aerosol generating matrix. Furthermore, the heating units 13 can heat different areas of the aerosol generating matrix at different times depending on the heating status, thereby improving consistency during the inhalation process.

[0084] In some embodiments, a plurality of heating elements 13 are arranged at intervals along the axial direction of the heating assembly 10, and each heating element 13 extends at least partially along the circumferential direction of the heating assembly 10 in a bent or straight manner.

[0085] In some embodiments, the first electrodes 132 of the plurality of heating units 13 are all connected to the same conductive unit 15, and the second electrodes 133 of the plurality of heating units 13 are respectively connected to other conductive units 15, thereby reducing the number of conductive units 15 required.

[0086] In this embodiment, there are four heating units 13, which are spaced apart along the axial direction of the heating assembly 10 (the axial direction of the base tube 11). In the direction from the first end 101 to the second end 102, the four heating units 13 are respectively the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d.

[0087] There are five conductive units 15, namely the first conductive unit 151, the second conductive unit 152, the third conductive unit 153, the fourth conductive unit 154, and the fifth conductive unit 155.

[0088] The first electrodes 132 of the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d are all connected to the first conductive unit 151. The second electrodes 133 of the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d are respectively connected to the second conductive unit 152, the third conductive unit 153, the fourth conductive unit 154, and the fifth conductive unit 155. In this way, the four heating units 13 only need to be connected to the control circuit through five conductive units 15.

[0089] In some embodiments, the heating structure 16 can be fabricated using a roll-up process, and it can be formed by winding a sheet-like heating structure onto a substrate tube structure 17. The specific fabrication method of the heating structure 16 is as follows: first, a sheet-like substrate layer 14 is prepared using processes such as casting; then, heating units 13 (e.g., ...) are printed on one side of the sheet-like substrate layer 14. Figure 6 As shown), conductive units 15 are printed on the other side of the sheet-like substrate layer 14 (e.g., ...). Figure 7 (As shown), then the sheet-like substrate layer 14, on which the heating unit 13 and the conductive unit 15 are printed, is wound onto the base tube structure 17 and sintered. By sintering, the heating structure 16 is fixed to the outer surface of the base tube structure 17 as a whole, which makes the fixing of the heating structure 16 more secure.

[0090] The sheet-like substrate layer 14 has four sides, namely side 141, side 142, side 143, and side 144. Sides 141 and 142 are arranged opposite each other in the height direction of the sheet-like substrate layer 14, and sides 143 and 144 are arranged opposite each other in the length direction of the sheet-like substrate layer 14. A plurality of heating elements 13 are spaced apart in the height direction of the sheet-like substrate layer 14, and each heating element 13 extends at least partially along the length direction of the sheet-like substrate layer 14.

[0091] When the sheet-like substrate layer 14 is wound into a film, the side 141 faces the first end 101 and the second end 102 of the substrate tube 11, respectively, while the side 143 and the side 144 are joined together after winding.

[0092] On the one hand, when printing the heating unit 13 on the sheet-like substrate layer 14, in order to facilitate the processing and assembly of the heating unit 13, the heating unit 13 is kept at a certain distance from the side edge 141, side edge 142, side edge 143, and side edge 144.

[0093] On the other hand, roll-to-roll processes generally involve overlapping areas, which are the areas where the sheet-like substrate layer 14 is stacked after being rolled up. Specifically, the sheet-like substrate layer 14 is at least partially overlapped (stacked) at sides 143 and 144. The heating unit 13 is usually not printed in the overlapping area.

[0094] Thus, after the base layer 14 is wound onto the substrate tube structure 17, a blank area 130 without heating element 13 is formed on the substrate tube structure 17 at the position corresponding to the winding joint of the base layer 14. The temperature of this blank area 130 is relatively low because no heating element 13 is provided. Here, the winding joint of the base layer 14 refers to the joint position of the base layer 14 at the side 143 and side 144 after winding.

[0095] The blank area 130 extends axially along the substrate tube structure 17, that is, along the length direction of the sides 143 and 144. Furthermore, the blank area 130 has a certain length in the circumferential direction of the substrate tube structure 17. The circumferential length d1 of the blank area 130 along the substrate tube structure 17 can be 0.5mm to 3mm, preferably 1.1mm to 1.6mm. If d1 is less than 0.5mm, existing film-winding processes are difficult to implement, and the circuits of the heating units on both sides of the blank area 130 are prone to short circuits; if d1 is greater than 3mm, the area of ​​the blank area 130 becomes too large, resulting in an uneven circumferential temperature field.

[0096] In some embodiments, the minimum distance from the heating unit 13 closest to side 141 to side 141 can be 0.3mm to 2mm (e.g., 0.6mm), and the minimum distance from the heating unit 13 closest to side 142 to side 142 can be 0.3mm to 2mm (e.g., 1.3mm), thereby ensuring that the heating area of ​​the heating unit 13 is large enough, and at the same time, facilitating the processing and assembly of the heating unit 13.

[0097] The gap d2 between two adjacent heating units 13 can range from 0.3mm to 2mm, preferably around 0.5mm. Within this range, on the one hand, it can avoid the two heating units 13 from being too small and easily short-circuiting, and on the other hand, it can avoid the low temperature zone from being too large.

[0098] The first electrode 132 and the second electrode 133 of each heating unit 13 are located on both sides of the length direction of the sheet-like substrate layer 14, and are respectively spaced apart from the side edge 143 and the side edge 144. In some embodiments, the distance between the first electrode 132 and the side edge 143 can be 0.6mm to 1.5mm (e.g., 1.0mm), and the distance between the second electrode 133 and the side edge 143 can be 0.6mm to 1.5mm (e.g., 1.0mm).

[0099] The heating element 131 of each heating unit 13 extends non-linearly along the length of the sheet-like base layer 14 (e.g., S-shaped or zigzag), which helps to increase the heating area of ​​the heating element 131. Specifically, in this embodiment, the heating element 131 extends uniformly in a serpentine pattern (S-shaped or S-like) along the length of the sheet-like base layer 14. The serpentine shape allows the heating element 131 to have a larger heating area.

[0100] After the sheet-like substrate layer 14 is wound onto the substrate tube structure 17, the heating body 131 of each heating unit 13 extends in a serpentine manner along the circumferential direction of the substrate tube structure 17. The first electrodes 132 of the four heating units 13 are distributed at intervals along the axial direction of the substrate tube structure 17, and the second electrodes 133 of the four heating units 13 are also distributed at intervals along the axial direction of the substrate tube structure 17.

[0101] Since the first electrode 132 and the second electrode 133 of each heating unit 13 are close to the side 143 and the side 144 respectively, after winding, a blank area 130 is formed between the first electrode 132 and the second electrode 133. Alternatively, the blank area 130 can be described as having a first side 1301 and a second side 1302 that are circumferentially opposite each other, with the first electrode 132 positioned close to the first side 1301 and the second electrode 133 positioned close to the second side 1302.

[0102] Since the temperatures at the first electrode 132 and the second electrode 133 are generally lower than the temperature of the heating body 131, and the blank area 130 is also lower in temperature because no heating unit 13 is provided, the temperature of the heating component 10 in the unsteady state will be relatively low.

[0103] The starting order of the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d can be set arbitrarily as needed.

[0104] Considering that the first heating unit 13a is closest to the suction end of the aerosol generating device 100, it is preferable to start the first heating unit 13a first for heating, which can achieve the effect of rapid smoke production. The fourth heating unit 13d, which is furthest from the suction end, can be started last. The residual heating temperature of the previously started heating unit 13 can preheat the aerosol generating matrix area corresponding to the fourth heating unit 13d, thus making condensation less likely to occur.

[0105] In some embodiments, the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d may be activated sequentially.

[0106] In some embodiments, the heating unit 13 (first heating unit 13a) near the first end 101 of the base tube 11 has the smallest projected area on the base tube 11, that is, the heating area is the smallest. This allows energy to be concentrated to heat a small portion, achieving a rapid smoke-generating effect and reducing preheating time. Furthermore, the reduced heating area decreases the capacity required by the battery cell 30, thereby reducing the maximum discharge current to the battery cell 30 and simplifying battery cell selection.

[0107] Typically, the heating area of ​​the heating unit 13 can be reduced by decreasing one or more of its length, width, height, etc.

[0108] For example, in some embodiments, the height of the heating unit 13 (e.g., the first heating unit 13a) near the first end 101 of the base tube 11 in the axial direction is less than the height of the other heating units 13 in the axial direction of the base tube 11, such that the projected area of ​​the heating unit 13 near the first end 101 of the base tube 11 on the base tube 11 is less than the projected area of ​​the other heating units 13 on the base tube 11. As another example, the height of the plurality of heating units 13 in the axial direction of the base tube 11 gradually decreases from the first end 101 to the second end 102. Specifically, in this embodiment, the heights of the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d in the axial direction of the base tube 11 gradually increase. For example, the first heating unit 13a has the smallest axial height in the base tube 11, the fourth heating unit 13d has the largest axial height in the base tube 11, while the second heating unit 13b and the third heating unit 13c have approximately equal axial heights in the base tube 11, which are greater than the height of the first heating unit 13a in the base tube 11 and less than the height of the fourth heating unit 13d in the base tube 11. Alternatively, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d may also have approximately equal axial heights in the base tube 11.

[0109] For another example, the length of the heating unit 13 (such as the first heating unit 13a) near the first end 101 of the base tube 11 is less than the lengths of the remaining heating units 13. Alternatively, the lengths of the plurality of heating units 13 gradually increase from the first end 101 to the second end 102.

[0110] Set the line length of each heating unit 13 as L and the line width (wire diameter) as B. The ratio range of L / B of each heating unit 13 can be 10 - 30, and existing conductive pastes can all meet this range.

[0111] In some embodiments, the line lengths L and line widths B of the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d satisfy: L1 / B1 < L2 / B2 < L3 / B3 ≈ L4 / B4. Among them, the deviation of L3 / B3 ≈ L4 / B4 ≤ 30%.

[0112] The resistance value of the heating unit 13 = resistivity * (L / B) / thickness. The ratio of L1 / B1 of the first heating unit 13a is the smallest, so the resistance value is the smallest, ensuring that it can reach the maximum power quickly in a short time.

[0113] The line width B of the heating unit 13 can be 0.4 mm - 1.2 mm, preferably about 1.0 ± 0.2 mm. Within this range, it can avoid the circuit being too narrow and prone to breakage resulting in an open circuit, and avoid the circuit being too wide and prone to shrinkage resulting in film belt cracking.

[0114] Each conductive unit 15 includes a conductive connection portion 150. The conductive connection portion 150 mainly undertakes the electrical connection function. The line width of the conductive connection portion 150 is small to reduce energy consumption. In some embodiments, the line width of the conductive connection portion 150 can be 1.2 mm - 2.5 mm, preferably about 2.0 mm. If the line width of the conductive connection portion 150 is too large, it is easy to increase energy consumption. If it is too small, it is not easy to ensure the reliability of the connection with electrode connection structures such as electrode leads and elastic pieces.

[0115] At least one conductive unit 15 includes a heat - equalizing portion 156. The heat - equalizing portion 156 mainly undertakes the heat - equalizing function, and the line width of the heat - equalizing portion 156 is large. The heat - equalizing portion 156 extends along the circumferential direction of the base tube structure 17 and along the axial direction of the base tube structure 17, so as to obtain a larger heat - equalizing area and better heat - equalizing effect. The heat - equalizing portion 156 can cover at least a part of the heating unit 13, thereby reducing the temperature difference of the corresponding heating unit 13 and playing a role in heat uniformity. Preferably, the heat - equalizing portion 156 can at least cover at least a part of the heating unit 13 (the first heating unit 13a) closest to the suction end, improving the consistency during the first puff.

[0116] Of course, both the conductive connection part 150 and the heat-spreading part 156 can simultaneously perform the functions of heat spreading and electrical conduction. By incorporating these two functions into one material, costs can be saved.

[0117] In some embodiments, the conductive connection portion 150 and the heat-spreading portion 156 can be printed and formed in one step using the same material, such as silver paste screen printing and sintering. The process is simple and silver has a high thermal conductivity.

[0118] In other embodiments, the conductive connection portion 150 and the heat-spreading portion 156 can also be arranged in two layers. The conductive connection portion 150 uses one material (e.g., silver paste), and the heat-spreading portion 156 uses another material (e.g., graphite sheet). This can reduce the difficulty of matching the sintering process and improve the yield.

[0119] In this embodiment, in order to reduce energy consumption, only the second conductive unit 152 and the third conductive unit 153 are provided with heat equalization section 156 to heat the first heating unit 13a and the second heating unit 13b closest to the suction end, respectively.

[0120] In addition, the shape of each conductive unit 15 on the sheet-like substrate layer 14 can be a straight line or a segmented straight line design, which is also beneficial to reduce energy consumption and save materials.

[0121] Specifically, the first conductive unit 151 is simultaneously connected to the first electrodes 132 of the four heating units 13, and may only have a conductive connection portion 150. The first conductive unit 151 may extend linearly along the width direction of the sheet-like substrate layer 14 (i.e., along the axial direction of the substrate tube structure 17), and is disposed close to the side 143 of the sheet-like substrate layer 14 and is spaced apart from the side 143.

[0122] The fourth conductive unit 154 and the fifth conductive unit 155 only have a conductive connection portion 150. The conductive connection portion 150 first extends along the width direction of the sheet-like substrate layer 14, and then bends and extends along the length direction of the sheet-like substrate layer 14.

[0123] Both the second conductive unit 152 and the third conductive unit 153 include a conductive connection portion 150 and a heat-spreading portion 156. The conductive connection portion 150 extends linearly along the width direction of the sheet-like substrate layer 14, and the heat-spreading portion 156 extends linearly along the length direction of the sheet-like substrate layer 14 from the upper end (the end facing the side 141) of the conductive connection portion 150. After the sheet-like substrate layer 14 is wound around the base tube structure 17, the conductive connection portion 150 extends linearly along the axial direction of the base tube structure 17, and the heat-spreading portion 156 extends linearly along the circumferential direction of the base tube structure 17.

[0124] The projection of the heat-spreading portion 156 of the second conductive unit 152 onto the base tube structure 17 can cover most of the first heating unit 13a, reducing the temperature difference of the first heating unit 13a. Preferably, the axial height of the heat-spreading portion 156 of the second conductive unit 152 on the base tube structure 17 is comparable to (e.g., equal to, slightly greater than, or slightly less than) the axial height of the first heating unit 13a on the base tube structure 17. The two axial end faces of the heat-spreading portion 156 of the second conductive unit 152 can be approximately at the same height as the two axial end faces of the first heating unit 13a. This ensures good heat spread and saves materials while reducing energy consumption. For example, the axial height of the first heating unit 13a on the base tube structure 17 is 2.6 ± 0.1 mm, and the axial height of the heat-spreading portion 156 of the second conductive unit 152 on the base tube structure 17 is also 2.6 ± 0.1 mm.

[0125] Similarly, the projection of the heat-spreading portion 156 of the third conductive unit 153 onto the base tube structure 17 can cover most of the second heating unit 13b, reducing the temperature difference of the second heating unit 13b. Preferably, the axial height of the heat-spreading portion 156 of the third conductive unit 153 on the base tube structure 17 is comparable to (e.g., equal to, slightly greater than, or slightly less than) the axial height of the second heating unit 13b on the base tube structure 17. The two axial end faces of the heat-spreading portion 156 of the third conductive unit 153 can be approximately at the same height as the two axial end faces of the second heating unit 13b, respectively. This ensures good heat spread and saves materials while reducing energy consumption. For example, the axial height of the second heating unit 13b on the base tube structure 17 is 4.2 ± 0.1 mm, and the axial height of the heat-spreading portion 156 of the third conductive unit 153 on the base tube structure 17 is also 4.2 ± 0.1 mm.

[0126] Figures 11 to 16 The heating element 10 in the second embodiment of this utility model is shown. Its main difference from the first embodiment is that the heating body 131 in this embodiment includes a first part 1311 and a second part 1312. The first part 1311 and the second part 1312 are wound in opposite directions around the circumference of the substrate tube structure 17 / base layer 14. Specifically, the heating body 131 is formed by the first electrode 132 extending a distance along the circumference of the base layer 14 in one direction (e.g., clockwise or counterclockwise) to form the first part 1311, and then folding back to extend along the circumference of the base layer 14 in the opposite direction (e.g., counterclockwise or clockwise) to connect with the second part 1312. This part extending in the opposite direction is the second part 1312.

[0127] The first portion 1311 of each heating element 131 is closer to the suction end than the second portion 1312. The first portion 1311 preferably extends in a serpentine curve to increase the heating area. Of course, the curved shape will occupy more axial space. If the axial space is insufficient, the first portion 1311 of one or more heating elements 131 can also extend in a straight line.

[0128] The second part 1312 can extend in a straight line, which is beneficial for a compact design in the axial direction. Of course, if there is enough axial space, the second part 1312 can also be extended in a curved shape.

[0129] Specifically, in this embodiment, the first portion 1311 of the heating unit 13 (first heating unit 13a) closest to the suction end (first end 101) extends in a straight line, while the first portions 1311 of the other three heating units 13 extend in a serpentine shape. In addition, the second portions 1312 of the four heating units 13 all extend in a straight line.

[0130] The heating body 131 may also include a third part 1313 connecting the first part 1311 and the second part 1312, and the shape of the third part 1313 may be straight or curved.

[0131] Figure 14 A schematic diagram of a heating unit 13 printed on a sheet-like substrate 14 is shown. The first electrodes 132 of the four heating units 13 are all disposed close to the side 143 of the sheet-like substrate 14 and are arranged sequentially at intervals approximately along the width direction of the sheet-like substrate 14. A first portion 1311 extends from the first electrode 132 towards the other side 144 of the sheet-like substrate 14 in a straight line or in a curved (serpentine) manner to a position close to the side 144, and then extends back towards the side 143 to connect with the second electrode 133.

[0132] The length of the second portion 1312 of the four heating units 13 gradually decreases from the first end 101 to the second end 102. That is, the second electrodes 133 of the four heating units 13 are staggered in both the length and width directions of the sheet-like substrate layer 14. After the sheet-like substrate layer 14 is wound onto the substrate tube structure 17, the second electrodes 133 of the four heating units 13 are staggered in both the circumferential and axial directions of the substrate tube structure 17.

[0133] In the roll film process, there is usually an overlapping area, which is the area where the sheet substrate layer 14 is stacked after being rolled up. Specifically, the sheet substrate layer 14 is at least partially overlapped (coinciding) at sides 143 and 144.

[0134] After the base layer 14 is wound onto the substrate tube structure 17, a blank area 130 extending axially is formed on the substrate tube structure 17 at the position corresponding to the winding joint of the base layer 14. The blank area 130 is relatively low in temperature as no heating unit 13 is provided there. Since the first electrodes 132 of the four heating units 13 are all close to the side 143 and the third portion 1313 is close to the side 144, after winding, the first electrodes 132 of the four heating units 13 are all close to the first side 1301 of the blank area 130, and the third portion 1313 is close to the second side 1302 of the blank area 130. In other words, a blank area 130 is formed between the first electrode 132 and the third portion 1313. However, the second electrodes 133 of the four heating units 13 are all moved away from the side 144 through the second portion 1312, thus moving away from the blank area 130.

[0135] Because the temperature of the third part 1313 is relatively high, it will improve the low temperature situation in the blank area 130, resulting in better temperature uniformity.

[0136] The first conductive unit 151 includes a conductive connection portion 150 and a heat-spreading portion 156. The heat-spreading portion 156 includes four heat-spreading sections: a first heat-spreading section 1561, a second heat-spreading section 1562, a third heat-spreading section 1563, and a fourth heat-spreading section 1564. These sections are sequentially spaced from the first end 101 to the second end 102, and adjacent heat-spreading sections are connected by the conductive connection portion 150.

[0137] The first heat-spreading section 1561, the second heat-spreading section 1562, the third heat-spreading section 1563, and the fourth heat-spreading section 1564 are used to spread heat evenly on the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d, respectively. The height of each heat-spreading section in the axial direction of the base tube structure 17 is approximately equal to (e.g., equal to, slightly greater than, or slightly less than) the height of the corresponding heating unit 13 in the axial direction of the base tube structure 17. The two end faces of each heat-spreading section in the axial direction can be approximately at the same height as the two end faces of the corresponding heating unit 13 in the axial direction. In this way, a good heat spreader effect can be ensured, while saving materials and reducing energy consumption.

[0138] The second conductive unit 152, the third conductive unit 153, the fourth conductive unit 154, and the fifth conductive unit 155 only have a conductive connection portion 150.

[0139] Figure 15A schematic diagram of a conductive unit 15 printed on a sheet-like substrate layer 14 is shown. The conductive connection portion 150 of the first conductive unit 151 is disposed near side 143 and is at a certain distance from side 143. The conductive connection portion 150 extends along the width direction of the sheet-like substrate layer 14 and is at a certain distance from both side 141 and side 142. A heat dissipation portion 156 is disposed near side 144 and is at a certain distance from side 144. The heat dissipation segments of the heat dissipation portion 156 are spaced apart.

[0140] After the base layer 14 is wound onto the base tube structure 17, the base layer 14 partially overlaps at sides 143 and 144. The conductive connection portion 150 and the heat-spreading portion 156 may partially overlap to ensure a reliable electrical connection between them. Of course, the conductive connection portion 150 and the heat-spreading portion 156 may also be joined only at the edges, as long as an electrical connection between them can be achieved.

[0141] In this embodiment, the projection of the heat-spreading section 156 onto the substrate tube structure 17 can completely or partially cover the blank area 130, thereby enabling the rapid conduction of heat from other locations to the blank area 130 for heat spread, reducing the temperature difference between the blank area 130 and other locations, and thus achieving better transient temperature uniformity. In contrast, the heat-spreading section 156 in the first embodiment does not cover the blank area 130, resulting in relatively poor transient temperature (e.g., temperature in the first 10 seconds) uniformity.

[0142] Table 1 shows the transient temperature simulation data of the heating units obtained when heating is performed using the heating components 10 of the first and second embodiments, respectively. Here, 13a-1, 13b-1, 13c-1, and 13d-1 represent the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d in the first embodiment, respectively; and 13a-2, 13b-2, 13c-2, and 13d-2 represent the first heating unit 13a, the second heating unit 13b, the third heating unit 13c, and the fourth heating unit 13d in the second embodiment, respectively. As can be seen from Table 1, the heating component 10 in the second embodiment exhibits better transient temperature difference performance, particularly showing a better effect on reducing the temperature difference of the first heating unit 13a.

[0143] Table 1

[0144]

[0145] Figure 17 The heating component 10 in the third embodiment of the present invention is shown. The heating component 10 also includes a plurality of electrode leads 19 that are respectively connected to a plurality of conductive units 15.

[0146] Each conductive unit 15 is provided with a solder pad 18, and the electrode lead 19 can be soldered to the conductive unit 15 through the solder pad 18, resulting in good electrical connection reliability.

[0147] Preferably, the pads 18 are all located at the lower end of the conductive unit 15 (the end away from the suction end). The pads 18 of each conductive unit 15 are distributed at the bottom of the heating element 10, and the distance between the pads 18 and the lower end surface of the heating element 10 can be 1.0mm to 3.0mm, which is beneficial for processing and for other structures (such as cylindrical aerogel) to wrap the heating element 10.

[0148] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A heating assembly for an aerosol-generating device, the heating assembly comprising: The heating assembly comprises a base tube structure (17) and a heating structure (16) arranged on the outer side of the base tube structure (17), The heating structure (16) comprises a base layer (14), at least four heating units (13) arranged on the inner side of the base layer (14), and at least five conductive units (15) arranged on the outer side of the base layer (14) and electrically connected with the at least four heating units (13), The at least four heating units (13) are arranged at intervals in the axial direction of the base tube structure (17), and at least one of the heating units (13) extends non-linearly in the circumferential direction of the base tube structure (17).

2. The heat generating component of claim 1, wherein, Each of the heating units (13) comprises a heating body (131), a first electrode (132) and a second electrode (133) respectively arranged at two ends of the heating body (131), and the first electrode (132) and the second electrode (133) are electrically connected with two of the conductive units (15), The first electrode (132) and the second electrode (133) of each of the heating units (13) are arranged at intervals in the circumferential direction of the base tube structure (17), At least one of the conductive units (15) comprises a conductive connecting portion (150) and a heat conduction portion (156) connected with the conductive connecting portion (150).

3. The heat generating assembly of claim 2, wherein, The base layer (14) is wound on the base tube structure (17), At a position corresponding to the winding joint of the base layer (14), a blank area (130) without the heating unit (13) is formed on the base tube structure (17), The blank area (130) has a first side (1301) and a second side (1302) opposite in the circumferential direction, and the first electrode (132) is close to the first side (1301) of the blank area (130).

4. The heat generating assembly of claim 3, wherein, The heating body (131) comprises a first portion (1311) connected with the first electrode (132), a second portion (1312) connected with the second electrode (133), and a third portion (1313) connecting the first portion (1311) and the second portion (1312), The first portion (1311) and the second portion (1312) are arranged in opposite directions in the circumferential direction of the base tube structure (17), The third portion (1313) is close to the second side (1302) of the blank area (130).

5. The heat generating assembly of claim 4, wherein, The heating assembly has a first end close to the suction end of the aerosol generating device and a second end opposite to the first end, The second portion (1312) of each of the heating units (13) extends linearly in the circumferential direction of the base tube structure (17), The first portion (1311) of one of the heating units (13) close to the first end extends linearly or non-linearly in the circumferential direction of the base tube structure (17), and the first portion (1311) of the other heating units (13) extends non-linearly in the circumferential direction of the base tube structure (17).

6. The heat generating component of claim 3, wherein, A projection of the heat-diffusing portion (156) on the base tube structure (17) covers at least a portion of the blank area (130).

7. The heat generating component of claim 2, wherein, The heat-diffusing portion (156) comprises at least four heat-diffusing segments, and a projection of each of the at least four heat-diffusing segments on the base tube structure (17) covers a portion of the at least four heat-generating units (13) respectively.

8. The heat generating component of claim 7, wherein, A height of each of the heat-diffusing segments in an axial direction of the base tube structure (17) is equivalent to a height of the corresponding heat-generating unit (13) in the axial direction of the base tube structure (17).

9. The heat generating component of claim 2, wherein, The first electrodes (132) of the at least four heat-generating units (13) are electrically connected to one of the conductive units (15) respectively, and the second electrodes (133) of the at least four heat-generating units (13) are electrically connected to another at least four of the conductive units (15) respectively.

10. An aerosol-generating device comprising: The heat-generating assembly according to any one of claims 1 to 9; and A control circuit connected to the heat-generating assembly. ​

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