Heating assembly and aerosol generating device

Abstract

The utility model relates to the technical field of aerosol generation, in particular to a heating assembly and an aerosol generating device.The heating assembly is provided with an air outlet and a containing cavity, the containing cavity is used for containing an aerosol generating substrate, and an airflow channel is formed in the containing cavity and used for communicating the air outlet with the interior of the aerosol generating substrate; the heating assembly comprises a heating piece and a heat conduction piece, the heating piece comprises a base body part, an extension part and a bearing part, the extension part is arranged on the base body part and extends in the direction away from the base body part, the bearing part is arranged at the end, close to the base body part, of the extension part or arranged on the base body part, and the bearing part is used for supporting an aerosol generating substrate; one end of the heat conduction piece is arranged on the side face or the end of the extension part, and the other end extends in the extension direction of the extension part and forms a containing cavity with at least part of the heating piece in an enclosing mode. Due to the arrangement of the bearing part, offensive odor or harmful substances generated by high temperature can be avoided, so that the smoking taste of the aerosol is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerosol generation, and more particularly to a heating assembly and an aerosol generating device. BACKGROUND

[0002] The aerosol generating device (hereinafter referred to as "generating device") can use the heat effect of an electronic heating element to bake and heat an aerosol generating substrate, so that the aerosol generating substrate can generate aerosol and other volatile substances without burning. The generating device in the prior art has a heating element whose heating line is too close to the aerosol generating substrate, causing the temperature at the contact position to be too high, which leads to excessive heating of the aerosol generating substrate and the generation of harmful substances, which not only affects the user's taste, but also produces harmful substances. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a heating assembly and an aerosol generating device, which can reduce the generation of harmful substances and improve the user's taste.

[0004] The present application provides a heating assembly, which has an air outlet and a containing cavity, the containing cavity is used to accommodate an aerosol generating substrate, and a gas flow channel is arranged in the containing cavity, the gas flow channel is used to communicate the air outlet and the inside of the aerosol generating substrate; the heating assembly comprises:

[0005] A heating element, which comprises a base portion, an extension portion and a bearing portion, the extension portion is arranged on the base portion and extends away from the base portion, and the bearing portion is arranged on one end of the extension portion close to the base portion or on the base portion, and the bearing portion is used to support the aerosol generating substrate;

[0006] A heat conducting element, one end of the heat conducting element is arranged on the side surface or the end portion of the extension portion, the other end of the heat conducting element extends along the extension direction of the extension portion, and at least part of the heat conducting element and the heating element enclose the containing cavity.

[0007] In some optional embodiments, the bearing portion is arranged on the base portion, and the extension portion and the bearing portion are sequentially and spaced apart from outside to inside along the radial direction of the base portion, an installation space is formed between the side surface of the extension portion and the side surface of the bearing portion, and one end of the heat conducting element is inserted into the installation space and is arranged in close contact with the side surfaces of the extension portion and the bearing portion.

[0008] In some optional embodiments, the end portion of the extension portion away from the base portion is provided with a limiting structure, the limiting structure extends along the extension direction of the heat conducting element, one end of the heat conducting element is arranged at the end portion of the extension portion away from the base portion, and the side surface of the heat conducting element abuts against the inner wall of the limiting structure.

[0009] In some alternative embodiments, the base portion has a heating wire, which is arranged on an outer surface of the base portion and / or inside the base portion.

[0010] In some alternative embodiments, the airflow passage includes a first ventilation section, a second ventilation section and a third ventilation section, the first ventilation section is arranged along an extending direction of the heat conducting member and communicates with the air outlet, the second ventilation section is arranged on the supporting portion, the second ventilation section communicates the first ventilation section and the third ventilation section, and the third ventilation section is formed between an end of the aerosol generating substrate and the base portion.

[0011] In some alternative embodiments, the supporting portion includes a plurality of supporting protrusions, the plurality of supporting protrusions are arranged in an annular array around a center of the base portion, and the second ventilation section is formed between two adjacent supporting protrusions.

[0012] Alternatively, the supporting portion is an annular protrusion arranged around the center of the base portion, and the second ventilation section is arranged on the annular protrusion.

[0013] In some alternative embodiments, the inner wall of the heat conducting member is provided with a plurality of supporting protrusions, the plurality of supporting protrusions are arranged at intervals to form the first ventilation section.

[0014] In some alternative embodiments, the first ventilation section includes a first part and a second part, the supporting protrusions are strip-shaped protrusions arranged along an extending direction of the heat conducting member, an extending length of the strip-shaped protrusions is less than an extending length of the heat conducting member, and the strip-shaped protrusions are arranged at intervals from the supporting portion, the first part is formed between two adjacent strip-shaped protrusions, and the second part is formed between the inner wall of the heat conducting member, the supporting protrusions and the supporting portion.

[0015] In some alternative embodiments, the heating member and the heat conducting member are fixed by bonding.

[0016] The present application provides an aerosol generating device, which includes a housing assembly, a power supply assembly and a heating assembly as described above, the power supply assembly and the heating assembly are arranged in the housing assembly, and the power supply assembly supplies power to the heating assembly.

[0017] According to the heating assembly and the aerosol generating device in the embodiment, the heating assembly comprises a heating element and a heat conducting element. The heating element comprises a base portion, an extension portion and a bearing portion. The extension portion is arranged on the base portion and extends away from the base portion. The bearing portion is arranged at one end of the extension portion close to the base portion or on the base portion. The bearing portion is used for supporting the aerosol generating substrate. One end of the heat conducting element is arranged on the side surface or the end portion of the extension portion. The other end of the heat conducting element extends along the extension direction of the extension portion and encloses the at least part of the heating element to form a containing cavity. Since the heating element serves as a heating source and the heat conducting element serves as a heat conducting substrate, the airflow flowing through the heat conducting element is heated into a hot airflow. The hot airflow can enter the bottom hot airflow heating from the aerosol end along the airflow channel, which helps to heat the aerosol generating substrate sufficiently. Due to the arrangement of the bearing portion, the direct contact between the end of the aerosol generating substrate and the base portion can be reduced, so that the aerosol generating substrate and its packaging paper can be prevented from generating odors or harmful substances due to high temperature, thereby improving the smoking taste of the aerosol. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural cross-sectional view of the generating device in use in an embodiment;

[0019] Figure 2 It is a structural cross-sectional view of the heating assembly in an embodiment;

[0020] Figure 3 It is a structural cross-sectional view of the cooperation between the heating element and the heat conducting element in an embodiment;

[0021] Figure 4 It is a structural cross-sectional view of the cooperation between the heating element and the heat conducting element in another embodiment;

[0022] Figure 5 It is a structural schematic view of the heating element in an embodiment;

[0023] Figure 6 It is a schematic view of the airflow flow in an embodiment;

[0024] Figure 7 It is a structural schematic view of the cooperation between the heating element and the heat conducting element in an embodiment;

[0025] Figure 8 It is an exploded view of the heating assembly in an embodiment.

[0026] Wherein: 100, shell assembly; 110, containing space; 200, power supply assembly; 300, heating assembly; 310, air outlet; 320, accommodating cavity; 330, airflow channel; 331, first ventilation section; 332, second ventilation section; 333, third ventilation section; 340, heating element; 341, base portion; 3411, heating line; 342, extension portion; 343, bearing portion; 3431, bearing protrusion; 344, mounting space; 345, limiting structure; 346, first step; 347, second step; 350, heat conduction element; 351, support protrusion; 352, first clamping element; 360, support assembly; 361, shell; 3611, second clamping element; 362, base; 363, upper cover; 3631, insertion hole; A, aerosol generating substrate. DETAILED DESCRIPTION

[0027] The application will be described in further detail below with reference to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following embodiments, many specific details are described in order to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that some features, which are not necessarily the most important to an implementation, can be omitted or can be substituted for by other handlings, materials, or methods. In some cases, some operations described in the specification can not be shown or described in the specification in order to avoid obscuring the core of the application, and it is not necessary for one skilled in the art to describe these operations in detail based on the description in the specification and general technical knowledge in the art.

[0028] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can be sequentially adjusted or adjusted in a manner that is apparent to one skilled in the art. Therefore, the specification and drawings are only intended to clearly describe one embodiment, and do not mean that the composition and / or order is necessary.

[0029] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and have no technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connections (couplings).

[0030] The application provides an aerosol generating device (hereinafter referred to as "generating device") which can heat the aerosol generating substrate A to form an aerosol for use by the user by using the principle of heating without combustion.

[0031] It is noted that the term aerosol as used herein refers to a dispersion of solid or liquid particles in a gas. As used herein, "aerosol" can be used to refer generally to a substance that has been vaporized, atomized, in the form of a spray or jet, or otherwise converted from a solid or liquid form to an inhalable form comprising suspended solid or liquid drug particles.

[0032] As used herein, the term "aerosol generating substrate A" refers to any suitable compound or mixture of compounds that facilitates aerosol (e.g. stable aerosol that is substantially resistant to thermal degradation at the operating temperature of the system) formation in use. Suitable aerosol generating substrates A are well known in the art and include, but are not limited to: polyhydric alcohols such as triethylene glycol, 1,3-butanediol and glycerol; esters of polyhydric alcohols such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or poly-carboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. The aerosol generating substrate A can include nicotine. The aerosol generating substrate A can include water. The aerosol generating substrate A can include glycerol (also known as glycerine) which has a higher boiling point than nicotine. The aerosol generating substrate A can include propylene glycol. The aerosol generating substrate A can include plant-based material. The aerosol generating substrate A can include homogenized plant-based material. The homogenized plant-based material can contain volatile compounds. These compounds can be released from the aerosol generating substrate A upon heating. The aerosol generating substrate A is generally wound into a cylindrical structure by a wrapping paper.

[0033] Referring to Figure 1 The generating device includes a shell assembly 100, a power supply assembly 200 and a heating assembly 300. The shell assembly 100 provides a containing space 110 for the power supply assembly 200 and the heating assembly 300, and also protects the power supply assembly 200 and the heating assembly 300, and facilitates the carrying and transportation of the generating device. The power supply assembly 200 and the heating assembly 300 are electrically connected, and can supply power to the heating assembly 300, and also adjust the working temperature and / or power of the heating assembly 300.

[0034] Since the shell assembly 100 and the power supply assembly 200 are prior art and not the focus of the protection scheme of the present application, they will not be described in detail here. The heating assembly 300 will be described in detail below.

[0035] Referring to Figures 2 to 8 The heating assembly 300 has an air outlet 310 and a containing cavity 320. The containing cavity 320 is used to contain the aerosol generating substrate A. The containing cavity 320 is provided with an airflow passage 330 for connecting the air outlet 310 and the inside of the aerosol generating substrate A. When a user inhales, airflow can enter the inside of the aerosol generating substrate A along the airflow passage 330 from the air outlet 310, and carry the aerosol to the user's mouth. The schematic diagram of the airflow circulation is as follows:Figure 6 as shown.

[0036] Referring to Figures 2 to 4 and Figure 7 The heating assembly 300 includes a heating element 340 and a heat conducting element 350, the heating element 340 as a heating source of the entire heating assembly 300, generates heat after being powered on, and the heat conducting element 350 as a heat transfer medium of the entire heating assembly 300, is in thermal contact with the heating element 340, and can transfer the heat generated by the heating element 340 to the aerosol generating substrate A arranged inside or the airflow flowing through.

[0037] The heating element 340 includes a base portion 341, an extension portion 342, and a bearing portion 343. The extension portion 342 is arranged on the base portion 341 and extends away from the base portion 341 (parallel to the Y direction). The extension portion 342 and the base portion 341 form a cylindrical structure with one end open and one end closed. The bearing portion 343 is arranged on the end of the extension portion 342 close to the base portion 341 or on the base portion 341. The bearing portion 343 is used to support the aerosol generating substrate A. Through the arrangement of the bearing portion 343, the end of the aerosol generating substrate A can be prevented from directly contacting the base portion 341, i.e., the end of the aerosol generating substrate A can be prevented from directly contacting the heating source, so that the aerosol generating substrate A and its packaging paper can be prevented from generating odors or harmful substances due to high temperature, thereby improving the smoking taste of the aerosol and protecting the health of the user.

[0038] One end of the heat conducting element 350 is arranged on the side or end of the extension portion 342, and the other end extends along the extension direction of the extension portion 342 (parallel to the Y direction) and encloses at least part of the heating element 340 to form a receiving cavity 320. Since the heat conducting element 350 is in contact with the heating element 340, the heat conducting element 350 can conduct heat through contact. The heat conducting element 350 is part of the structure forming the receiving cavity 320. The receiving cavity 320 is provided with an airflow passage 330, so that the airflow flowing through the airflow passage 330 can be heated by the heat conducting element 350 to form a hot airflow.

[0039] Based on the heat conduction function of the heat conducting element 350, the heat conducting element 350 should be made of a high-thermal-conductivity material, which can improve the heat conduction efficiency and heat utilization rate, thereby effectively reducing the power consumption of the power supply assembly 200. Specifically, the thermal conductivity of the heat conducting element 350 is > 15 W / (K•m), for example, the heat conducting element 350 can include but is not limited to aluminum alloy, copper alloy, aluminum nitride, silicon carbide, or aluminum oxide.

[0040] Referring to Figure 3In some embodiments, the bearing portion 343 is arranged on the base portion 341, and the extension portion 342 and the bearing portion 343 are sequentially and spaced apart along the radial direction (X direction) of the base portion 341 from outside to inside, and the mounting space 344 is formed between the side surface of the extension portion 342 and the side surface of the bearing portion 343, and one end of the heat conduction member 350 is inserted into the mounting space 344 and is arranged in abutment with the side surfaces of the extension portion 342 and the bearing portion 343. The side surfaces of the extension portion 342 and the bearing portion 343 can achieve the insertion and fixation of the heat conduction member 350, which is conducive to improving the stability of the fixation of the heat conduction member 350.

[0041] It should be noted that, since the aerosol generating substrate A is generally in a cylindrical structure (i.e., a cylindrical shape), in order to adapt to its structural form, the heat conduction member 350 and the heating element 340 and the like formed in the accommodation cavity 320 are generally cylindrical, and the base portion 341 constituting the heating element 340 is also cylindrical and has an axial direction and a radial direction, as shown in FIG. 3, the X direction is the radial direction, the Y direction is the axial direction, and from outside to inside refers to the direction along the radial direction of the base portion 341 from its edge to its center.

[0042] In other embodiments, one end of the heat conduction member 350 is arranged at the end of the extension portion 342 away from the base portion 341, i.e., the extension portion 342 and the heat conduction member 350 are sequentially and continuously arranged in a direction away from the base portion 341 (parallel to the Y direction).

[0043] Of course, in order to improve the installation stability of the heat conduction member 350, please refer to Figure 4 , the end of the extension portion 342 away from the base portion 341 is provided with a limiting structure 345, the limiting structure 345 extends along the extension direction of the heat conduction member 350 (the Y direction in the figure), one end of the heat conduction member 350 is arranged at the end of the extension portion 342 away from the base portion 341, and the side surface thereof abuts against the inner wall of the limiting structure 345, the limiting structure 345 can limit the assembly position of the heat conduction member 350 in the circumferential direction (which can also be understood as the radial direction) and can fix it to avoid radial deviation after installation. Specifically, the bearing portion 343, the extension portion 342, and the extension portion 342 are sequentially arranged from inside to outside along the radial direction (X direction in the figure) on the base portion 341, and are sequentially and continuously arranged along the axial direction (Y direction in the figure), to form two first steps 346 and a second step 347, the first step 346 is used to limit the aerosol generating substrate A, and the second step 347 is used to limit the heat conduction member 350.

[0044] In order to further improve the installation stability of the heat conduction member 350 and effectively ensure the realization of the function of the generating device, the heating element 340 and the heat conduction member 350 are adhesively fixed. For example, the heat conduction member 350 and the heating element 340 are fixed by a glass glaze or ceramic glue sintering fixation method.

[0045] Please refer toFigure 5 In some embodiments, the base portion 341 has a heating circuit 3411 arranged on the outer surface of the base portion 341 and / or inside the base portion 341. The heating circuit 3411 can be formed on the base portion 341 by printing, brushing, or the like using a slurry of a conductive material. The heating circuit 3411 serves as a substantial heat source, and the actual function of the base portion 341 is to conduct heat. Therefore, the base portion 341 can be made of a high-thermal-conductivity material, specifically, the thermal conductivity of the base portion 341 is > 15 W / (K m), for example, the base portion 341 can include but is not limited to aluminum alloy, copper alloy, aluminum nitride, silicon carbide, aluminum oxide, or stainless steel, etc.

[0046] Of course, in other embodiments, the base portion 341 can directly serve as a heat source, which can be made of a resistive material, and can directly generate heat after being powered on. The resistive material includes one or more of gold, silver, palladium, platinum, iron, rhenium, ruthenium, and rhodium, or can also include conductive ceramics.

[0047] Please refer to Figure 6 and Figure 7 In some embodiments, the airflow passage 330 includes a first air passage section 331, a second air passage section 332, and a third air passage section 333. The first air passage section 331 is arranged along the extension direction of the heat-conducting member 350 and communicates with the air outlet 310. The second air passage section 332 is arranged on the carrier portion 343 and communicates the first air passage section 331 and the third air passage section 333. The third air passage section 333 is formed between the end portion of the aerosol-generating substrate A and the base portion 341. Since the third air passage section 333 is formed between the base portion 341 and the end portion of the aerosol-generating substrate A, the third air passage section 333 not only allows the hot airflow to flow into the aerosol-generating substrate A, but also serves as a buffer space for the hot airflow, which helps to continuously generate aerosol. Meanwhile, in this buffer space, the hot airflow in contact with the base portion 341 can further increase its temperature, which helps to speed up the generation of aerosol and improve heat utilization.

[0048] Please refer to Figure 7 In some embodiments, the carrier portion 343 includes a plurality of carrier protrusions 3431 arranged at intervals and arranged in a ring array around the center of the base portion 341. The second air passage section 332 is formed between adjacent two carrier protrusions 3431. The arrangement of the second air passage section 332 changes the direction of the airflow, so that the airflow flowing along the side wall of the aerosol-generating substrate A flows to the end portion of the aerosol-generating substrate A. The arrangement of the plurality of carrier protrusions 3431 can also reduce the contact area between the aerosol-generating substrate A and the heating member 340, thereby reducing the temperature of the end portion of the aerosol-generating substrate A, especially the temperature on the wrapping paper thereof.

[0049] Of course, in other embodiments, the bearing portion 343 can also be an annular protrusion arranged around the center of the base portion 341, and the second air passage section 332 is arranged on the annular protrusion. Specifically, the annular protrusion can be provided with a hole structure capable of allowing airflow to pass through, and the hole structure is uniformly arranged along the circumference of the annular protrusion to ensure that the airflow uniformly enters the aerosol generating substrate A and that the aerosol generating substrate A is uniformly in contact with the bearing portion 343.

[0050] The inner wall of the heat conduction member 350 is provided with a plurality of support protrusions 351, which are arranged at intervals to form the first air passage section 331. The plurality of support protrusions 351 can be strip-shaped, point-shaped or block-shaped protrusions. The support protrusions 351 can abut against the side wall of the aerosol generating substrate A, so that part of the structure inside the heat conduction member 350 is not attached to the aerosol generating substrate A, thereby forming a space for airflow, which is defined as the first air passage section 331. At least part of the support protrusions 351 are uniformly arranged along the circumference of the heat conduction member 350, and part of the support protrusions 351 are uniformly arranged along the axial direction of the heat conduction member 350, which helps to center the installation of the aerosol generating substrate A and makes the aerosol generating substrate A circumferentially form the first air passage section 331 uniform, which helps to uniformly heat the aerosol generating substrate A by the hot airflow.

[0051] Please refer to Figure 7 , the support protrusions 351 are strip-shaped protrusions arranged along the extension direction of the heat conduction member 350, and a plurality of strip-shaped protrusions are uniformly and spaced arranged along the inner wall of the heat conduction member 350, thereby helping to form the first air passage section 331 uniformly distributed around the aerosol generating substrate A. The extension length of the strip-shaped protrusion can be less than the extension length of the heat conduction member 350, and is arranged at intervals with the bearing portion 343, the first air passage section 331 includes a first part and a second part, the first part is formed between adjacent two strip-shaped protrusions, and the second part is formed between the inner wall of the heat conduction member 350, the support protrusion 351 and the bearing portion 343. This kind of structure design can reduce the processing difficulty while effectively guaranteeing the realization of the function.

[0052] Please refer to Figure 2 and Figure 8 The heating assembly 300 further comprises a support assembly 360 for facilitating the installation of the heat generating member 340 and the heat conduction member 350, the support assembly 360 comprises a shell 361, a base 362 and an upper cover 363, the shell 361 is a hollow structure with open ends, the base 362 and the upper cover 363 are arranged at the two ends of the shell 361 respectively, the base 362 is sealingly connected with the shell 361, and the upper cover 363 is provided with an insertion hole 3631 in the middle. The heat generating member 340 and the heat conduction member 350 are arranged inside the shell 361, and the aerosol generating substrate A can be inserted into the accommodation cavity 320 through the insertion hole 3631.

[0053] In order to avoid structural failure of the support assembly 360 due to high temperature, affecting the air tightness in the generating device or affecting the fixed installation of the heat generating member 340 and the heat conducting member 350, the shell 361, the base 362 and the upper cover 363 in the support assembly 360 are all made of high-temperature-resistant and low-thermal-conductivity material, and the thermal conductivity is <3W / (K•m). For example, made of polyether ether ketone (PEEK), polyphenylene sulfone resin (PPSU) and the like. The support assembly 360 is made of low-thermal-conductivity material, which can also reduce the heat loss from the support assembly 360 due to thermal contact, and help to improve the heat utilization rate of the heating assembly 300, thereby helping to reduce the power consumption of the power supply assembly 200.

[0054] In order to further reduce the heat loss at the support assembly 360, the heat conducting member 350 is suspended inside the support assembly 360. Please refer to Figure 2 In a specific embodiment, the outer wall of the heat conducting member 350 is provided with a first clamping member 352 extending radially outwardly therefrom, the inner wall of the shell 361 is provided with a second clamping member 3611 extending radially inwardly therefrom, the first clamping member 352 is arranged on the second clamping member 3611, and the upper cover 363 is arranged on the side of the first clamping member 352 away from the second clamping member 3611, so that the first clamping member 352 is pressed between the second clamping member 3611 and the upper cover 363. At the same time, the heat generating member 340 is arranged in spaced relation with the base 362, and the contact area of the heat conducting member 350 and the heat generating member 340 with the support assembly 360 is the contact area of the first clamping member 352 and the second clamping member 3611 and the upper cover 363, effectively reducing the contact area and reducing the heat loss due to contact, thereby reducing the heat loss.

[0055] The above application of specific examples is used to illustrate the present application, which is only used to help understand the present application, and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A heating assembly, characterized in that, The heating assembly has an air outlet and a receiving cavity, the receiving cavity being used to contain the aerosol generating matrix, and an airflow channel being provided within the receiving cavity for communicating with the air outlet and the interior of the aerosol generating matrix; the heating assembly includes: A heating element, comprising a base portion, an extension portion, and a support portion, wherein the extension portion is disposed on the base portion and extends in a direction away from the base portion, and the support portion is disposed at one end of the extension portion near the base portion or disposed on the base portion, and the support portion is used to support the aerosol generating matrix; A heat-conducting element, one end of which is disposed on the side or end of the extension portion, and the other end extends along the extension direction of the extension portion, and surrounds at least a portion of the heating element to form the accommodating cavity.

2. The heating assembly according to claim 1, characterized in that, The support portion is disposed on the base portion, and the extension portion and the support portion are arranged sequentially from the outside to the inside along the radial direction of the base portion. An installation space is formed between the side of the extension portion and the side of the support portion. One end of the heat-conducting member is inserted into the installation space and is fitted against the side of the extension portion and the support portion.

3. The heating assembly according to claim 1, characterized in that, The end of the extension portion away from the base portion is provided with a limiting structure. The limiting structure extends along the extension direction of the heat-conducting member. One end of the heat-conducting member is located at the end of the extension portion away from the base portion, and its side abuts against the inner wall of the limiting structure.

4. The heating assembly according to claim 1, characterized in that, The base portion has heating circuits, which are disposed on the outer surface of the base portion and / or inside the base portion.

5. The heating assembly according to claim 1, characterized in that, The airflow channel includes a first ventilation section, a second ventilation section, and a third ventilation section. The first ventilation section is arranged along the extension direction of the heat-conducting component and is connected to the air outlet. The second ventilation section is disposed on the supporting part and connects the first ventilation section and the third ventilation section. The third ventilation section is formed between the end of the aerosol generating matrix and the substrate part.

6. The heating assembly according to claim 5, characterized in that, The supporting part includes a plurality of supporting protrusions, which are arranged at intervals and in a ring array around the center of the base part, and a second ventilation section is formed between two adjacent supporting protrusions; Alternatively, the supporting portion may be an annular protrusion disposed around the center of the base portion, and the second venting section may be disposed on the annular protrusion.

7. The heating assembly according to claim 5, characterized in that, The inner wall of the heat-conducting component is provided with multiple supporting protrusions, which are spaced apart to form the first ventilation section.

8. The heating assembly according to claim 7, characterized in that, The first ventilation section includes a first part and a second part. The supporting protrusion is a strip-shaped protrusion arranged along the extension direction of the heat-conducting element. The extension length of the strip-shaped protrusion is less than the extension length of the heat-conducting element and is spaced apart from the bearing part. The first part is formed between two adjacent strip-shaped protrusions, and the second part is formed between the inner wall of the heat-conducting element, the supporting protrusion and the bearing part.

9. The heating assembly according to claim 1, characterized in that, The heating element and the heat-conducting element are bonded and fixed together.

10. An aerosol generating device, characterized in that, It includes a housing assembly, a power supply assembly, and a heating assembly as described in any one of claims 1-9, wherein the power supply assembly and the heating assembly are disposed within the housing assembly, and the power supply assembly supplies power to the heating assembly.

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