A heating assembly for an aerosol-generating device and an aerosol-generating device

Abstract

A heating assembly (100) for an aerosol generating device (200) and the aerosol generating device (200) relate to the field of aerosol generation. The heating assembly (100) comprises a longitudinally extending cavity (30), an electric heating element (20), a shell (10) and an air inlet channel (60). The electric heating element (20) is located at one end of the longitudinally extending cavity (30) and extends along the direction of the longitudinal axis and has a plurality of holes (21). The electric heating element (20) is configured to heat the gas flowing through the holes (21) to a temperature not lower than 200 DEG C so as to flow into the longitudinally extending cavity (30). The shell (10) is sleeved around the outer circumferential side of the electric heating element (20), and an air gap is provided between the shell (10) and the electric heating element (20). The air inlet channel (60) is only partially arranged in the region of the air gap. The heating assembly (100) heats the bottom of the aerosol forming substrate (301). Under the action of the air gap, the heat energy emitted by the electric heating element (20) and the longitudinally extending cavity (30) is blocked by the air gap, the heat energy is collected, the temperature of the aerosol forming substrate (301) is compensated, and the waste heat of the electric heating element (20) is effectively utilized.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, and in particular to a heating component for an aerosol generation device and an aerosol generation device. Background Technology

[0002] Currently, with the widespread use of electronic products in cigarette technology, more and more smokers are starting to use electrically operated aerosol generation systems. One type of aerosol generation system for non-combustible tobacco products works by heating a low-temperature non-combustible tobacco with a heating element to generate aerosol gas, which is then inhaled. Existing heated non-combustible aerosol generation systems typically employ either tubular peripheral heating or center-embedded heating. Center-embedded heating involves inserting the heating element into the aerosol-generating matrix, which alters the porosity of the matrix, increasing suction resistance. Furthermore, the residual aerosol-generating matrix after inhalation makes cleaning the heating element difficult. Tubular peripheral heating involves the heating element surrounding the aerosol-generating matrix. In particular, tubular peripheral heating involves a three-dimensional, circumferential heating process, which can overheat the packaging paper surrounding the aerosol-generating matrix while neglecting to adequately heat the central portion, leading to waste and hindering sufficient heating of the aerosol-generating matrix. Attached Figure Description

[0003] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0004] Figure 1 A schematic view of a heating assembly for an aerosol generating apparatus in some embodiments of this application is shown;

[0005] Figure 2 It shows Figure 1 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0006] Figure 3 A three-dimensional structural schematic diagram of a longitudinally extending cavity in one embodiment of this application is shown;

[0007] Figure 4 This illustration shows a schematic diagram of the longitudinally extending cavity from one perspective in one embodiment of the present application.

[0008] Figure 5 It shows Figure 4 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0009] Figure 6 This illustration shows a schematic diagram of an aerosol generating substrate located within a heating assembly in one embodiment of this application.

[0010] Figure 7 This illustration shows a portion of the metal support tube housing the electric heating element extending from the longitudinally extending cavity in one embodiment of this application.

[0011] Figure 8 A three-dimensional structural diagram of the base is shown in one embodiment of this application;

[0012] Figure 9 This is a schematic diagram of an aerosol generating apparatus according to one embodiment of the present application;

[0013] Figure 10 It shows Figure 9 Schematic diagram of the cross-sectional structure along the CC direction;

[0014] Figure 11 It shows Figure 10 Enlarged structural diagram of section D in the middle;

[0015] Figure 12 An exploded view of an aerosol generating apparatus according to one embodiment of this application is shown;

[0016] Figure 13 A perspective view of the housing is shown in some embodiments of this application;

[0017] Figure 14 This paper shows a cross-sectional view of the housing and insulation in some embodiments of this application.

[0018] Figure 15 A cross-sectional structural schematic diagram of another embodiment of this application is shown;

[0019] Figure 16 For the appendix Figure 15 A schematic diagram of the exploded structure cross-section of this application.

[0020] Explanation of key component symbols:

[0021] 100-Heating component; 10-Housing; 11-Outer wall; 111-Air inlet; 12-Base; 121-Connecting hole; 122-Bracket; 123-Air passage; 124-Circuit board; 13-Protruding prism; 14-Opening limiting part; 15-Extension tube; 20-Electric heating element; 21-Channel; 22-Heating core; 30-Longitudinal extension cavity; 31-Heat conduction tube; 311-Annular tube wall; 312-Positioning part; 313-Cavity area; 32-Rigid tube body; 321-Annular protrusion; 33-Metal support tube; 331-Hollowed area; 40-Insulation component; 41-Internal cavity; 42-Sleeve; 50-Sealing ring; 60-Air inlet passage; 200-Aerosol generating device; 300-Aerosol generating product; 301-Aerosol forming matrix. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0024] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly 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. "Below," "under," and "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.

[0027] like Figure 1 , Figure 6 and Figure 9 As shown, an embodiment of this application provides a heating component 100 for an aerosol generating device 200, applied to the aerosol generating device 200 to heat a non-combustible tobacco product, such as an aerosol generating article 300, for inhalation by a user. In this application, the aerosol generating device 200 may interact with an aerosol forming matrix 301 of the aerosol generating article 300 to generate an aerosol that can be directly inhaled into the user's mouth. The aerosol generating device 200 involves interacting with an aerosol forming matrix to generate an aerosol. The aerosol forming matrix may be a component of the aerosol generating article. The aerosol generating device may include one or more components for supplying energy from a power source to the aerosol forming matrix to generate an aerosol. The aerosol forming matrix 301 is a matrix capable of releasing volatile compounds that can form aerosols. In some embodiments, the aerosol forming matrix 301 may be formed from processed tobacco or may include processed tobacco, such as homogenized tobacco, cast tobacco, or plant material that does not contain tobacco components.

[0028] See also Figure 2 and Figure 10 The heating assembly 100 includes a longitudinally extending cavity 30, an electric heating element 20, a housing 10, and an air inlet channel. The longitudinally extending cavity 30 is used to house an aerosol-generating article 300 comprising an aerosol-forming matrix 301. The longitudinally extending cavity 30 has a longitudinal axis H and includes a wall forming at least a portion of the longitudinally extending cavity 30. The wall is constructed by splicing together one or more elements to form the wall of the longitudinally extending cavity 30. The electric heating element 20 is located at one end of the longitudinally extending cavity 30 and extends along the longitudinal axis H, having a plurality of channels 21. The electric heating element 20 is configured to heat the gas flowing through the channels 21 to a temperature not lower than 200°C so that it can flow into the longitudinally extending cavity 30, for heating the aerosol-forming matrix of the aerosol-generating article 300 to release aerosol gas for inhalation by a user.

[0029] Combination Figure 15As shown in this application, the housing 10 is sleeved around the outer periphery of the electric heating element 20, and an air gap D3 is provided between the housing 10 and the electric heating element 20. The air inlet channel 60 is adjacent to the inner wall of the housing 10 and is only partially configured within the area of ​​the air gap D3.

[0030] The heating assembly 100 for an aerosol generating apparatus provided in this application includes an electric heating element 20 electrically connected to the power supply of the aerosol generating apparatus via connecting electrodes. The electric heating element 20 heats the aerosol forming matrix, such as a non-combustible tobacco product, located within a longitudinally extending cavity 30. The electric heating element 20 is positioned at one end of the longitudinally extending cavity 30 and extends along the longitudinal axis, having multiple channels 21. The electric heating element 20 is configured to heat the gas flowing through the channels 21 to a temperature not lower than 200°C, allowing it to flow into the longitudinally extending cavity 30 and enter the aerosol generating product 300 from the bottom of the aerosol forming matrix 301. Simultaneously, due to the presence of an air gap D3, the heat emitted by the electric heating element 20 and the periphery of the longitudinally extending cavity 30 is blocked by the air gap, achieving heat collection, storage, and insulation. This provides temperature compensation for the aerosol forming matrix, effectively utilizing the waste heat of the electric heating element 20 and improving the thermal efficiency of the heating assembly.

[0031] It should be noted that in this embodiment, the heating element 20 can be a porous heating element 21. The porous heating element 21 is a heating pattern made of a ceramic part containing zirconium oxide and a precious metal heating paste. The material of the heating pattern includes, but is not limited to, silver and tungsten; other suitable printed circuit materials are also acceptable. The printing thickness of the heating pattern is 0.005–0.05 mm. The material of the connecting electrode includes, but is not limited to, copper, silver, and nickel, and its diameter is 0.1–0.3 mm. In addition, the porous heating element 21 in this embodiment can also be made of a metal material and can be electrically connected to a power source for resistive heating, or can be heated by eddy current induction in a periodically alternating magnetic field environment.

[0032] like Figures 3 to 5 As shown, in some embodiments, the heating assembly further includes a rigid tube 32, which is made of metal or a high-temperature resistant plastic material such as polyimide, polyetheretherketone (PEEK), etc., and its rigidity is significantly greater than the overall strength of the aerosol-generating product 300. The rigid tube 32 abuts against the electric heating element 20 along the longitudinal axis, and the rigid tube 32 is at least a portion of the wall of the longitudinally extending cavity 30 to improve the overall structural strength.

[0033] It should be noted that in this embodiment, the rigid tube 32 is made of metal or a high-temperature resistant plastic material such as polyimide or polyetheretherketone (PEEK), and its rigidity is significantly greater than the overall strength of the aerosol-generating product 300. The low heat transfer efficiency of the plastic rigid tube 32 ensures that the temperature of the aerosol-forming matrix of the non-combustible tobacco product inside the rigid tube 32 does not exceed 400°C.

[0034] like Figures 3 to 5 As shown, in some embodiments, the heating assembly further includes a metal support tube 33 extending along the longitudinal axis. The metal support tube 33 is sleeved on the outer periphery of the electric heating element 20 and the rigid tube body 32, thereby reducing the speed at which heat emitted from the electric heating element 20 is transferred to the housing 10, thereby improving the heat preservation effect.

[0035] like Figure 1 and Figure 2 As shown, in some embodiments, the heating assembly further includes a heat insulation member 40 disposed between the housing 10 and the electric heating element 20. The heat insulation member 40, adjacent to the inner wall of the housing 10, forms at least a portion of the air intake channel 60 with the housing 10. Thus, under the action of the heat insulation member 40, the heat energy emitted by the electric heating element 20 and the periphery of the longitudinally extending cavity 30 is blocked by the heat insulation member 40, achieving heat energy collection and thereby compensating for the temperature of the aerosol generating substrate.

[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the insulation element 40 is configured as a metal sleeve with an internal cavity 41, which is evacuated to a pressure lower than that outside the sleeve 42. This internal cavity 41 is a sealed cavity; this design allows the internal cavity 41 to be designed to be near a vacuum state, preventing rapid heat loss. Optionally, the sleeve can be integrally formed from a metal material.

[0037] Of course, in other embodiments, the internal cavity 41 is filled with an inert gas; or the internal cavity 41 contains a liquid. If the internal cavity 41 is filled with a liquid, the liquid can slow down the dissipation of heat from the insulation 40 to the outside. The internal cavity 41 may also be filled with an inert gas.

[0038] Optionally, the heat insulation element 40 is a sleeve made of heat insulation material such as ceramic material. The heat insulation element 40 can also be other components capable of absorbing and transferring heat.

[0039] Optionally, the insulation component 40 is a vacuum tube. Due to the special nature of vacuum tubes, the thermal conductivity of their central cavity is very low, and a large amount of heat is conducted through the stainless steel material, thus both the inner and outer walls of the vacuum tube contain heat. Alternatively, a sleeve made of phase change material or insulation material can also be used.

[0040] See Figure 15 and Figure 16 As shown, this embodiment differs from other embodiments in that the insulation component 40 is a sleeve made of a metal material such as 304# stainless steel. The sleeve includes a cylinder wall and flanges extending from the cylinder wall at both ends, and the flanges abut against the shell.

[0041] Furthermore, the heat insulation element 40 is located on the outer periphery of the metal support tube 33, and a first gap D1 is formed between the heat insulation element 40 and the electric heating element 20. In this way, the heat emitted by the electric heating element 20 is first transferred through the gas in the first gap D1, avoiding direct contact heat transfer with the electric heating element 20.

[0042] When the electric heating element 20 heats the aerosol-forming matrix of the aerosol-generating product 300, heat is transferred to the wall of the longitudinally extending cavity 30, causing excessive heat accumulation and a rise in temperature. This results in the packaging paper of the aerosol-forming matrix 301 within the longitudinally extending cavity 30 being easily baked, discolored, and producing an off-flavor, thus reducing the taste for the smoker. Figures 3 to 5 As shown, to prevent the cigarette paper in the aerosol matrix 301 within the longitudinally extending cavity 30 from being easily baked and discolored, producing an odor, the metal support tube 33 further has multiple hollow areas 331. The hollow areas 331 at least partially overlap with the outer peripheral surface of the electric heating element 20.

[0043] It should be noted that the term "overlapping" in the embodiments refers to the situation where, when the inner diameter of the metal support tube 33 is greater than or equal to the outer diameter of the longitudinally extending cavity 30, the hollowed-out area 331 is located on the outer peripheral surface of the electric heating element 20, and from the orthographic projection direction of the cylindrical electric heating element 20, the hollowed-out area 331 is superimposed on the outer surface of the electric heating element 20. In this embodiment, it is not limited to the hollowed-out area 331 being at least partially superimposed on the outer peripheral surface of the longitudinally extending cavity 30.

[0044] In this embodiment, at least a portion of the hollowed-out area 331 overlaps with the outer peripheral surface of the electric heating element 20, so that the heat emitted by the electric heating element 20 is transferred to the outside of the metal support tube 33 through the air in the hollowed-out area 331. This avoids the electric heating element 20 directly conducting heat onto the longitudinally extending cavity 30, thus blocking a portion of the heat from being directly transferred to the longitudinally extending cavity 30. This reduces the temperature inside the longitudinally extending cavity 30, thereby preventing the packaging paper of the aerosol forming substrate inside the longitudinally extending cavity 30 from producing an odor due to high-temperature baking, and also avoiding the choking sensation caused by inhaling the smell of baked paper. This improves the smoker's smoking experience and ensures the consistency of the smoking experience.

[0045] Furthermore, a second gap D2 exists between the heat insulation element 40 and the metal support tube 33. This causes the heat dissipated from the electric heating element 20 to pass through a gas barrier again, reducing the heat transfer efficiency.

[0046] Furthermore, since the metal support tube 33 has multiple evenly distributed hollow areas 331, the spacing of the second gap D2 along the direction perpendicular to the longitudinal axis is less than the thickness of the first gap D1. This causes the heat dissipated from the electric heating element 20 to first pass through the gas barrier of the second gap, and then through another gas barrier equal to the difference in thickness between the first gap D1 and the second gap D2, thus reducing heat transfer efficiency.

[0047] In some embodiments, the rigid tube 32 includes a portion of its wall connected to the electric heating element 20 to form the longitudinally extending cavity 30. An annular protrusion 321 is provided extending from the wall away from the electric heating element 20, and the annular protrusion 321 is nested and connected to the heat insulation element 40. This facilitates the installation of the heat insulation element 40 and simultaneously establishes a first gap D1 between the heat insulation element 40 and the electric heating element 20.

[0048] like Figure 4 As shown, further, a sealing ring 50 is provided between the annular protrusion 321 and the heat insulation component 40. Specifically, an annular groove can be formed on the annular protrusion 321, and the sealing ring 50 can be fitted inside the annular groove, that is, a sealing ring 50 is provided between the heat insulation component 40 and the annular protrusion 321 to improve its sealing performance.

[0049] like Figure 2 , Figure 6 , Figure 10 and Figure 12As shown, in some embodiments, optionally, the housing 10 includes an outer shell wall 11 and a base 12 that mates with the outer shell wall 11. The outer shell wall 11 includes an opening defining portion 14 at an end and a sidewall extending from the opening defining portion 14 and connected to the base 12. The opening defining portion 14 is part of the wall of the longitudinally extending cavity 30 to form a whole housing 10.

[0050] Specifically, the base 12 is provided with a bracket 122 to support the electric heating element 20, so that the electric heating element 20 is at a certain distance from the surface of the base 12 and does not contact it, so that an air passage 123 is provided between the base 12 and the electric heating element 20, and the air passage 123 connects the air intake passage 60 and the multiple channels 21 of the electric heating element 20. Figure 13 As shown, optionally, the outer casing wall 11 has a plurality of air inlets 111 that communicate with the external air and the air inlet channel 60.

[0051] In this embodiment, the residual heat from the heating element 20 is conducted from the hollowed-out area 331 to the air intake channel 60, forming high-temperature gas within the air intake channel 60, which remains there. When the user inhales the aerosol-generating product 300, ambient temperature gas enters the air intake channel 60 through the air inlet 111, replacing the high-temperature gas. Under the action of the suction airflow, the high-temperature gas enters the air passage 123 between the base 12 and the heating element 20, thereby transferring heat to the heating element 20, improving its heating efficiency and effectively utilizing its residual heat. This avoids the problem of poor taste caused by insufficient heat from the heating element 20 during continuous inhalation. In addition, when the ambient temperature gas replaces the high temperature gas in the airflow channel 60, the cold air entering from the air inlet 111 carries away the heat of the housing 10 through the airflow channel, which can cool and dissipate the temperature of the housing 10, thus achieving the effect of heat dissipation.

[0052] like Figure 14 As shown, optionally, the side wall of the housing 10 is provided with a plurality of protruding prisms 13, and the heat insulation member 40 abuts against the protruding prisms 13 and forms an air intake channel 60 with the outer housing wall 11, and the air intake channel 60 is connected to the air intake hole 111.

[0053] In this embodiment, multiple protruding prisms 13 support the outer wall of the insulation member 40. Each pair of adjacent protruding prisms 13, together with the outer wall of the insulation member 40, defines an air inlet channel 60. This allows multiple air inlet channels 60 to be formed along the circumference of the insulation member 40, facilitating gas flow and improving heat exchange efficiency. In other embodiments, the insulation member 40 is a sleeve, and the flange of the sleeve abuts against the protruding prisms 13, creating a gap between the insulation member 40 and the side wall of the shell 10. This gap is part of the air inlet channel. Of course, in other embodiments, the air inlet channel 60 can also be a spiral groove formed on the circumference of the inner wall of the shell 10, or a spiral groove formed on the circumference of the outer wall of the insulation member 40, and is not limited to these.

[0054] like Figure 13 As shown, in the above embodiment, optionally, the plurality of air inlets 111 are installed in the opening limiting portion 14.

[0055] like Figure 11 and Figure 13 As shown, in the above embodiment, the opening limiting portion 14 further includes an extension tube 15 in a direction away from the electric heating element 20. The extension tube 15 is configured to accommodate only a portion of the wall of the longitudinally extending cavity 30 of the aerosol generating article 300, in order to facilitate the insertion of the aerosol generating article 300.

[0056] Optionally, one end of the rigid tube 32 abuts against the opening limiting portion 14, and the inner diameter of the opening limiting portion 14 is greater than or equal to the inner diameter of the rigid tube 32.

[0057] like Figures 3 to 5 As shown, in some embodiments, optionally, the electric heating element 20 further includes a heat conduction tube 31 coaxial with the longitudinally extending cavity 30. The heat conduction tube 31 includes an annular tube wall 311 and a positioning portion 312 extending from the annular tube wall 311 towards the center. A heating core 22 having the plurality of channels 21 is housed within the annular tube wall 311. The heating core 22 heats the aerosol forming matrix 301 within the longitudinally extending cavity 30.

[0058] Furthermore, the heating element 22 is supported and fixed by a positioning part 312, and has a gap D4 between it and the annular tube wall 311. This gap D4 forms a gas barrier between the heating element 22 and the annular tube wall 311, which can prevent the heating element 22 from directly contacting the annular tube wall 311 and causing rapid heat loss.

[0059] In the above embodiment, optionally, the positioning part 312 divides the heat conduction tube 31 into two cavity regions 313. One cavity region 313 accommodates the electric heating element 20, thus facilitating the installation of the electric heating element 20. The other cavity region 313 accommodates a portion of the aerosol forming matrix. Further, the inner diameter of the cavity region 313 accommodating a portion of the aerosol generating article 300 of the aerosol forming matrix 301 is greater than or equal to the diameter of the aerosol generating article 300, to facilitate the placement of the aerosol generating article 300.

[0060] like Figure 7 As shown, in some embodiments, the metal support tube 33 further covers a portion d of the electric heating element 20 extending from the longitudinally extending cavity 30, and the hollowed-out area 331 is at least partially in communication with the gap between the electric heating element 20 and the metal support tube 33. This facilitates the dissipation of heat from the gap between the electric heating element 20 and the metal support tube 33 through the hollowed-out area 331.

[0061] like Figure 8 As shown, in any of the above embodiments, the base 12 has a connection hole 121, and the connection electrode of the electric heating element 20 passes through the connection hole 121 and is electrically connected to the circuit board 124. This facilitates the electrical connection between the connection electrode of the electric heating element 20 and the circuit board 124.

[0062] like Figures 9 to 12 As shown, embodiments of this application also provide an aerosol generating apparatus 200, which includes the heating component 100 for the aerosol generating apparatus 200 described in the above embodiments. Therefore, it possesses all the beneficial effects of the heating component 100 for the aerosol generating apparatus 200 in Embodiment 1 described above, which will not be elaborated upon here.

[0063] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples, without contradiction.

[0064] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A heating assembly for an aerosol generating apparatus, comprising: A longitudinally extending cavity for accommodating an aerosol-generating article comprising an aerosol-forming matrix, the longitudinally extending cavity having a longitudinal axis and including a wall forming at least a portion of the longitudinally extending cavity; characterized in that the heating assembly further comprises: An electric heating element is located at one end of the longitudinally extending cavity and extends along the longitudinal axis and has a plurality of channels. The electric heating element is configured to heat the gas flowing through the channels to a temperature not lower than 200°C so that it can flow into the longitudinally extending cavity. A housing, wherein the housing is sleeved around the outer periphery of the electric heating element and an air gap is provided between the housing and the electric heating element; An air intake channel, wherein the air intake channel is adjacent to the inner wall of the housing and is only partially configured within the area of ​​the air gap; The heating assembly further includes a rigid tube connected to the electric heating element along the longitudinal axis, the rigid tube being at least a portion of the wall of the longitudinally extending cavity; the heating assembly further includes a metal support tube extending along the longitudinal axis; the heating assembly further includes a heat insulation element disposed between the housing and the electric heating element, the heat insulation element being located on the outer periphery of the metal support tube, a first gap being present between the heat insulation element and the electric heating element, the metal support tube having multiple hollow areas, the hollow areas at least partially overlapping the outer periphery of the electric heating element.

2. The heating assembly for an aerosol generating device according to claim 1, characterized in that, The metal support tube is sleeved on the outer periphery of the electric heating element and the rigid tube body.

3. The heating assembly for an aerosol generating device according to claim 2, characterized in that, The insulation element, adjacent to the inner wall of the housing, forms at least a portion of the air intake channel with the housing.

4. The heating assembly for an aerosol generating apparatus according to claim 3, characterized in that, The insulation element is configured as a sleeve with an internal cavity, the internal cavity being evacuated to a lower pressure than the outside of the sleeve.

5. The heating assembly for an aerosol generating apparatus according to claim 1, characterized in that, There is a second gap between the insulation component and the metal support tube.

6. The heating assembly for an aerosol generating apparatus according to claim 5, characterized in that, The spacing of the second gap along the direction perpendicular to the longitudinal axis is less than the thickness of the first gap.

7. The heating assembly for an aerosol generating apparatus according to claim 3, characterized in that, The rigid tube includes at least a portion of the wall that is connected to the electric heating element to form the longitudinally extending cavity, and an annular protrusion is provided extending from the wall away from the electric heating element, the annular protrusion being nested and connected by the heat insulation element.

8. The heating assembly for an aerosol generating apparatus according to claim 3, characterized in that, The housing includes an outer shell wall and a base that mates with the outer shell wall. The outer shell wall includes an opening defining portion relative to an end and a side wall extending from the opening defining portion and connected to the base. The opening defining portion is part of the wall of the longitudinally extending cavity.

9. The heating assembly for an aerosol generating apparatus according to claim 8, characterized in that, The sidewall of the housing is provided with a plurality of protruding prisms, and the heat insulation element abuts against at least a portion of the protruding prisms and the outer wall of the housing to form an air intake channel.

10. The heating assembly for an aerosol generating apparatus according to claim 8, characterized in that, The opening limiting portion also includes an extension tube in a direction away from the electric heating element, the extension tube being configured to accommodate only a portion of the wall of the longitudinally extending cavity of the aerosol generating article.

11. The heating assembly for an aerosol generating apparatus according to claim 8, characterized in that, One end of the rigid tube abuts against the opening limiting portion, and the inner diameter of the opening limiting portion is greater than or equal to the inner diameter of the rigid tube.

12. The heating assembly for an aerosol generating apparatus according to claim 8, characterized in that, The base is provided with a bracket to support the electric heating element, and an air passage is provided between the base and the electric heating element. The air passage connects the air intake passage and multiple channels of the electric heating element.

13. The heating assembly for an aerosol generating apparatus according to any one of claims 8 to 12, characterized in that, The outer casing wall has multiple air inlets that connect the external air and the air intake channel.

14. The heating assembly for an aerosol generating apparatus according to claim 13, characterized in that, The plurality of air inlets are installed in the opening limiting part.

15. The heating assembly for an aerosol generating apparatus according to claim 1, characterized in that, The electric heating element further includes a heat conduction tube coaxial with the longitudinally extending cavity. The heat conduction tube includes an annular tube wall and a positioning portion extending from the annular tube wall toward the center. A heating core with the plurality of channels is housed inside the annular tube wall.

16. The heating assembly for an aerosol generating apparatus according to claim 15, characterized in that, The heating element is supported and fixed by one of the positioning parts, and there is a gap between it and the annular tube wall.

17. The heating assembly for an aerosol generating apparatus according to claim 16, characterized in that, The positioning part divides the heat conduction tube into two cavity regions. One cavity region accommodates the electric heating element, and the other cavity region accommodates a portion of the aerosol-generated product of the aerosol forming matrix.

18. An aerosol generating apparatus, characterized in that, Includes the heating assembly for an aerosol generating apparatus according to any one of claims 1 to 17.

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