Heating assembly and aerosol generating device

Abstract

The utility model provides a heating assembly and an aerosol generating device. The heating assembly comprises a containing pipe, a heat exchange core and a heating piece. A containing cavity is formed in the containing pipe, and a first opening is formed in one end of the containing cavity. At least part of the heat exchange core is arranged on the side, away from the first opening, of the containing cavity, and the heat exchange core is provided with heat exchange holes. The heating piece is arranged between the inner wall of the containing cavity and the heat exchange core, one part of heat generated by the heating piece is used for heating the heat exchange core, and the other part of the heat generated by the heating piece is used for heating the containing pipe; the heat conductivity of the accommodating pipe is h1; the heat conductivity of the heat exchange core is h2; the heat conductivity of the containing pipe is larger than that of the heat exchange core, or the heat conductivity of the containing pipe is smaller than that of the heat exchange core. According to the heating assembly and the aerosol generating device, the heating efficiency can be improved, and the heating energy consumption can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol atomization, and in particular to a heating component and an aerosol generating device. Background Art

[0002] An aerosol generating device is a device that heats and atomizes an aerosol generating substrate into an aerosol. Some aerosol generating devices use a hot air flow or circumferential heating method. The hot air flow heating method is: before the air flow enters the aerosol generating substrate, a heating tube is used to heat the air flow into a hot air flow, and the hot air flow then flows into the aerosol generating substrate for heating. The circumferential heating method is: the heating tube is set on the periphery of the aerosol generating substrate, and the heating tube directly heats the outer wall of the aerosol generating substrate.

[0003] However, no matter whether hot air flow heating or circumferential heating is adopted, the heating tube will dissipate heat outwards, resulting in low energy utilization rate. It is often necessary to heat the heating tube to above 350 degrees Celsius, resulting in high heating energy consumption. Utility Model Content

[0004] The present application provides a heating component and an aerosol generating device, which can solve the problems of low heating energy utilization rate and high energy consumption of the aerosol generating device.

[0005] In order to solve the above technical problems, the present application provides a heating component, including a receiving tube, a heat exchange core and a heating element. The receiving tube has a receiving cavity, and a first opening is provided at one end of the receiving cavity, and the first opening is used for inserting at least part of the aerosol generating matrix into the receiving cavity; at least part of the heat exchange core is arranged on the side of the receiving cavity away from the first opening, and the heat exchange core has a heat exchange hole, one end of the heat exchange hole is connected to the outside of the heat exchange core, and the other end of the heat exchange hole is connected to the receiving cavity; the heating element is arranged between the inner wall of the receiving cavity and the heat exchange core, and the heating element is used to generate heat, a part of the heat generated by the heating element is used to heat the heat exchange core, and another part of the heat generated by the heating element is used to heat the receiving tube; the thermal conductivity of the receiving tube is h1; the thermal conductivity of the heat exchange core is h2; the thermal conductivity of the receiving tube is greater than the thermal conductivity of the heat exchange core, or the thermal conductivity of the receiving tube is less than the thermal conductivity of the heat exchange core.

[0006] In one embodiment, 2W·m -1 ·K -1 -1 ·K -1 , 10W·m -1 ·K -1 <h2<500W·m -1 ·K -1 .

[0007] ​In one embodiment, the heating element is arranged around the outer circumference of the heat exchange core, and the heating element is arranged in close contact with the outer wall of the heat exchange core, and the thermal conductivity of the receiving tube is smaller than the thermal conductivity of the heat exchange core.

[0008] In one embodiment, the heating assembly also includes a shell assembly, a receiving tube is arranged inside the shell assembly, the shell assembly is provided with an air inlet, and the air inlet is connected to the heat exchange hole so that the gas entering the shell assembly from the air inlet can flow to the heat exchange hole; the heat exchange core is fixedly connected to the receiving tube, and the heat exchange core and the shell assembly are spaced apart.

[0009] In one embodiment, a first clamping portion is provided on the receiving tube, and a second clamping portion is provided on the heat exchange core. The receiving tube and the heat exchange core are clamped together by the first clamping portion and the second clamping portion.

[0010] In one embodiment, the air inlet is arranged on a side of the shell assembly close to the first opening, and a preheating channel is provided between the outer wall of the receiving tube and the shell assembly, one end of the preheating channel is connected to the air inlet, and the other end of the preheating channel is connected to the heat exchange hole, so that the gas entering from the air inlet can flow to the heat exchange hole through the preheating channel.

[0011] In one embodiment, the shell assembly includes a first end cover, a tube body and a second end cover, the tube body is sleeved on the outside of the receiving tube, the first end cover is covered on one end of the tube body, and the second end cover is covered on the other end of the tube body, and the heat exchange core is closer to the second end cover than the first end cover; the air inlet is arranged on the first end cover, a preheating channel is provided between the tube body and the receiving tube, and the heat exchange core and the second end cover are arranged at intervals.

[0012] In one embodiment, an insertion channel is provided in the first end cover, one end of the insertion channel is connected to the outside of the heating component, and the other end of the insertion channel is connected to the first opening, and the insertion channel is used for inserting the aerosol generating matrix into the receiving cavity.

[0013] In one embodiment, the inner diameter of one end of the insertion channel close to the first opening is smaller than the inner diameter of the end of the insertion channel away from the first opening, so that when the aerosol generating substrate is arranged in the insertion channel, the end of the insertion channel away from the first opening can form a first air inlet channel with the aerosol generating substrate, and the air inlet port is arranged on the inner wall of the first air inlet channel; a second air inlet channel is provided between the first end cover and the tube body, one end of the second air inlet channel is connected to the air inlet port, and the other end of the second air inlet channel is connected to the preheating channel; a third air inlet channel is provided between the heat exchange core and the second end cover, one end of the air inlet channel is connected to the preheating channel, and the other end of the air inlet channel is connected to the heat exchange hole.

[0014] In one embodiment, the receiving tube is configured as a receiving tube of aluminum, copper, aluminum oxide, silicon carbide or aluminum nitride, and the heat exchange core is configured as a heat exchange core of aluminum, copper, aluminum oxide, silicon carbide or aluminum nitride.

[0015] In order to solve the above technical problems, the present application provides an aerosol generating device, including a heating component, and the heating component is the heating component provided in any of the above embodiments.

[0016] The present application provides a heating assembly, including a receiving tube, a heat exchange core and a heating element. The receiving tube has a receiving cavity, and one end of the receiving cavity is provided with a first opening; at least part of the heat exchange core is arranged on a side of the receiving cavity away from the first opening, and the heat exchange core has a heat exchange hole; the heating element is arranged between the inner wall of the receiving cavity and the heat exchange core, a part of the heat generated by the heating element is used to heat the heat exchange core, and another part of the heat generated by the heating element is used to heat the receiving tube; the thermal conductivity of the receiving tube is h1; the thermal conductivity of the heat exchange core is h2; the thermal conductivity of the receiving tube is greater than the thermal conductivity of the heat exchange core, or the thermal conductivity of the receiving tube is less than the thermal conductivity of the heat exchange core. The present application arranges the heating element between the receiving tube and the heat exchange core, so that the heat generated by the heating element can be transferred inward to heat the heat exchange core, and can be transferred outward to heat the receiving tube; the heat exchange core has a heat exchange hole, and the heating heat exchange core can heat the airflow in the heat exchange hole, so that the airflow entering the aerosol generating substrate is a hot airflow; the receiving tube can receive the aerosol generating substrate, so that the aerosol generating substrate can be heated from the circumferential direction; that is, the present application adopts both the hot airflow and circumferential heating heating methods, and the heat of the heating element can be mostly used to heat the aerosol generating substrate regardless of whether it dissipates heat outward or inward, which is conducive to improving the heating efficiency and reducing the heating energy consumption. In addition, the present application limits the thermal conductivity of the receiving tube to be greater than the thermal conductivity of the heat exchange core, so that the heat of the heating element can be mainly used for circumferential heating, or the thermal conductivity of the heat exchange core is greater than the thermal conductivity of the receiving tube, so that the heat of the heating element is mainly used for hot airflow heating, thereby improving the heating efficiency and reducing the heating energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a heating assembly provided in one embodiment of the present application;

[0018] Figure 2 for Figure 1 A cross-sectional view of

[0019] Figure 3 Schematic diagram of air flow direction;

[0020] Figure 4 for Figure 1 Schematic diagram of the explosion structure. DETAILED DESCRIPTION

[0021] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0022] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0023] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0024] The terms "parallel", "vertical", etc. are defined for the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and approximately parallel, approximately vertical, etc. are all acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80° and 100°. The directional terms mentioned in the embodiments of the present application, such as "upper", "inner", "outer", "side", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0025] The present application provides an aerosol generating device, which includes a housing (not shown) and a heating component. The heating component is disposed inside the housing, and the heating component can be a heating component provided in any of the following embodiments. The aerosol generating device is a device that heats an aerosol generating substrate through a heating component.

[0026] The aerosol generating substrate may specifically include a plant grass leaf substrate, such as a tobacco substrate. The aerosol generating substrate may also include a protective cover, which may wrap the plant grass leaf substrate. For example, the plant grass leaf substrate may be wrapped inside an aluminum foil or paper for use. The aerosol generating device may not include the aerosol generating substrate, and the aerosol generating substrate may only be used as a consumable. The aerosol generating device may also include the aerosol generating substrate, depending on the situation.

[0027] Please refer to Figure 1-4 The present application provides a heating component, which can be used in an aerosol generating device.

[0028] Specifically, the heating assembly includes a receiving tube 10, a heat exchange core 20 and a heating element 30. The receiving tube 10 has a receiving cavity 11, both ends of the receiving tube 10 are open ends, one end of the receiving cavity 11 is provided with a first opening 111, and the other end of the receiving cavity 11 is provided with a second opening 112. The first opening 111 is used for at least part of the aerosol generating substrate to be inserted into or withdrawn from the receiving cavity 11.

[0029] At least part of the heat exchange core 20 is disposed on a side of the receiving chamber 11 away from the first opening 111, that is, the heat exchange core 20 is disposed in the receiving chamber 11, and the heat exchange core 20 is disposed at one end close to the second opening 112. In one embodiment, a boss 12 is convexly disposed on the inner wall of the receiving chamber 11, and the boss 12 can divide the receiving chamber 11 into a first installation chamber 13 and a second installation chamber 14. The first installation chamber 13 is used to install an aerosol generating substrate, and the aerosol generating substrate can abut against the boss 12. The second installation chamber 14 is used to install the heat exchange core 20.

[0030] The heat exchange core 20 has a heat exchange hole 21. One end of the heat exchange hole 21 is connected to the outside of the receiving chamber 11, and the other end of the heat exchange hole 21 is connected to the first installation cavity 13 of the receiving chamber 11, so that when the aerosol generating substrate is installed in the first installation cavity 13, the gas in the heat exchange hole 21 can flow to the inside of the aerosol generating substrate.

[0031] The heating element 30 is disposed between the inner wall of the receiving cavity 11 and the heat exchange core 20. Specifically, the heating element 30 is disposed between the inner wall of the second installation cavity 14 and the heat exchange core 20. The heating element 30 is used to generate heat, and a portion of the heat generated by the heating element 30 is transferred inwardly to heat the heat exchange core 20, and another portion of the heat generated by the heating element is transferred outwardly to heat the receiving tube 10. The present application does not limit the structural form of the heating element 30, and the heating element 30 can be, but is not limited to, a heating net, a heating wire, a heating circuit, a heating sheet, a heating film, etc.

[0032] The thermal conductivity of the receiving tube 10 is h1, where 2 W·m -1 ·K-1 -1 ·K -1 ; The thermal conductivity of the heat exchange core 20 is h2, where 10W·m -1 ·K -1 <h2<500W·m -1 ·K -1 For example, in one embodiment, the receiving tube 10 can be configured as a receiving tube 10 of aluminum, copper, aluminum oxide, silicon carbide or aluminum nitride, and the heat exchange core 20 can be configured as a heat exchange core 20 of aluminum, copper, aluminum oxide, silicon carbide or aluminum nitride.

[0033] In one embodiment, the thermal conductivity of the containment tube 10 is greater than the thermal conductivity of the heat exchange core 20. In this embodiment, most of the energy generated by the heating element is used to heat the containment tube 10, and a small part of the energy generated by the heating element is used to heat the heat exchange core 20. In another embodiment, the thermal conductivity of the containment tube 10 is less than the thermal conductivity of the heat exchange core 20. In this embodiment, most of the energy generated by the heating element is used to heat the heat exchange core 20, and a small part of the energy generated by the heating element is used to heat the containment tube 10.

[0034] By arranging the heating element 30 between the receiving tube 10 and the heat exchange core 20, the present application can make the heat generated by the heating element 30 be transferred inward to heat the heat exchange core 20, and be transferred outward to heat the receiving tube 10. When the heat exchange core 20 is heated, the airflow in the heat exchange hole 21 can be heated, so that the airflow entering the aerosol generating matrix is ​​a hot airflow. The receiving tube 10 can accommodate the aerosol generating matrix, so that when the receiving tube 10 is heated, the receiving tube 10 can heat the aerosol generating matrix from the circumferential direction. That is, the present application adopts the heating methods of hot air flow and circumferential heating at the same time. Regardless of whether the heating element 30 dissipates heat outward or inward, most of the heat can be used to heat the aerosol generating matrix, which is beneficial to improve the heating efficiency and reduce the heating energy consumption. Furthermore, the present application limits the thermal conductivity of the containment tube 10 to be greater than the thermal conductivity of the heat exchange core 20, so that the heat of the heating element 30 is mainly used for circumferential heating, or the thermal conductivity of the heat exchange core 20 is greater than the thermal conductivity of the containment tube 10, so that the heat of the heating element 30 is mainly used for hot air flow heating, thereby improving the heating efficiency and reducing the heating energy consumption.

[0035] For example, when the airflow in the heat exchange hole 21 needs to be heated to a specified temperature, if half of the heat of the heating element 30 is transferred to the receiving tube 10 and the other half is transferred to the heat exchange core 20, the heating element 30 needs to be heated to a higher temperature in order to make the airflow in the heat exchange hole 21 reach the specified temperature; and by setting the thermal conductivity of the heat exchange core 20 to be greater than the thermal conductivity of the receiving tube 10, most of the energy of the heating element 30 can be transferred to the heat exchange core 20, and the heating element 30 does not need to be heated to a higher temperature in order to make the airflow in the heat exchange hole 21 reach the specified temperature, thereby achieving the purpose of reducing heating energy consumption.​

[0036] In one embodiment, if Figure 2 and Figure 4 As shown, the heating element 30 is arranged around the outer periphery of the heat exchange core 20, and the heating element 30 is arranged in close contact with the outer side wall of the heat exchange core 20. There is a certain gap between the heating element 30 and the receiving tube 10, and the thermal conductivity of the receiving tube 10 is less than that of the heat exchange core 20. In this embodiment, most of the heat of the heating element 30 is used for hot air flow heating. The heating element 30 is close to the heat exchange core 20, so that when the heat of the heating element 30 is transferred to the heat exchange core 20, the heat loss is very small; and there is a certain air gap between the heating element 30 and the receiving tube 10, so that there is a certain heat loss during the heat transfer between the heating element 30 and the receiving tube 10, so that the heat obtained by the receiving tube 10 is less than that of the heat exchange core 20, so that the heating element 30 is mainly heated by hot air flow, and the heat of the aerosol generating matrix in the radial direction is more uniform.

[0037] In one embodiment, if Figure 1-4 As shown, the heating assembly further includes a housing assembly 40. The receiving tube 10 is disposed inside the housing assembly 40. The housing assembly 40 is provided with an air inlet 41, which is communicated with the heat exchange hole 21 so that the gas entering the housing assembly 40 from the air inlet 41 can flow to the heat exchange hole 21.

[0038] like Figure 2 and Figure 4 As shown, the heat exchange core 20 is fixedly connected to the receiving tube 10, and the fixed connection can be either a detachable connection or a non-detachable connection. The heat exchange core 20 is spaced apart from the shell assembly 40. Since the temperature of the heat exchange core 20 is relatively high, if the heat exchange core 20 is in contact with the shell assembly 40, the heat of the heat exchange core 20 may be directed to the shell assembly 40, resulting in reduced energy utilization. The present application adopts a receiving tube 10 to fix the heat exchange core 20, so that the bottom of the heat exchange core 20 can be suspended, that is, the heat exchange core 20 is spaced apart from the shell assembly 40, which can greatly reduce the energy of the heat exchange core 20 to conduct heat to the shell assembly 40, so that the heat exchange core 20 heats the gas in the heat exchange hole 21 more quickly, and further reduces the energy consumption of the heating element 30.

[0039] The heat exchange core 20 and the receiving tube 10 may be fixedly connected by, but not limited to, clamping, bonding, magnetic connection, etc. In one embodiment, Figure 4 As shown, the receiving tube 10 is provided with a first clamping portion 15, and the heat exchange core 20 is provided with a second clamping portion 22, and the receiving tube 10 and the heat exchange core 20 are clamped together through the first clamping portion 15 and the second clamping portion 22. Among them, one of the first clamping portion 15 and the second clamping portion 22 is a groove, and the other is a protrusion, and the groove is clamped with the protrusion.

[0040] In one embodiment, the end of the receiving tube 10 having the second opening 112 may be suspended, and the end of the receiving tube 10 close to the second opening 112 is spaced apart from the housing assembly 40 to reduce the energy of heat conduction from the receiving tube 10 to the housing assembly 40. The end of the receiving tube 10 having the first opening 111 may be fixedly connected to the housing assembly 40, and the fixed connection may be a detachable connection or a non-detachable connection.

[0041] In one embodiment, if Figure 2 and Figure 3 As shown, the air inlet 41 is disposed on one side of the housing assembly 40 close to the first opening 111, and a preheating channel 50 is provided between the outer wall of the receiving tube 10 and the housing assembly 40. One end of the preheating channel 50 is connected to the air inlet 41, and the other end of the preheating channel 50 is connected to the heat exchange hole 21, so that the gas entering from the air inlet 41 can flow to the heat exchange hole 21 through the preheating channel 50. Figure 3 As shown, Figure 3 The arrows indicate the direction of the airflow of the heating component. After the heating element 30 generates heat, the temperature of the heat exchange core 20 and the receiving tube 10 rises, and the air outside the receiving tube 10 (i.e., the air in the preheating channel 50) will be heated to a certain extent. When the user inhales, the airflow enters the shell assembly 40 from the air inlet 41. When the airflow passes through the preheating channel 50, it is initially heated by the hot air and the receiving tube 10, and then flows into the heat exchange core 20 for further heating, and finally flows into the aerosol generating matrix. This embodiment allows the heat dissipated to the outside of the receiving tube 10 to preheat the airflow, thereby improving the heat utilization rate of the receiving tube 10. The provision of the preheating channel 50 is conducive to heat recovery and utilization, further improving the energy utilization rate of the heating component. In order to further improve the energy utilization rate of the heating component, the shell assembly 40 can be made of a material with low thermal conductivity, such as polyetheretherketone material.

[0042] In one embodiment, if Figure 1-4 As shown, the shell assembly 40 includes a first end cover 42, a tube body 43 and a second end cover 44. The tube body 43 is sleeved on the outside of the receiving tube 10, and both ends of the tube body 43 are open ends. The first end cover 42 is covered on one end of the tube body 43, and the second end cover 44 is covered on the other end of the tube body 43. The heat exchange core 20 is closer to the second end cover 44 than the first end cover 42, that is, the first end cover 42 is covered on the side of the tube body 43 close to the first opening 111, and the second end cover 44 is covered on the side of the tube body 43 close to the second opening 112. The air inlet 41 is provided on the first end cover 42, and a preheating channel 50 is provided between the tube body 43 and the receiving tube 10, and the heat exchange core 20 is spaced apart from the second end cover 44. Therefore, the airflow entering from the air inlet 41 can pass through the preheating channel 50 and then flow into the heat exchange core 20, so as to improve the energy utilization rate of the heating component.

[0043] In one embodiment, an insertion channel 421 is provided in the first end cover 42, one end of the insertion channel 421 is connected to the outside of the heating component, and the other end of the insertion channel 421 is connected to the first opening 111. The insertion channel 421 is used for inserting the aerosol generating matrix into the receiving cavity 11, that is, the aerosol generating matrix can be arranged in the receiving cavity 11 through the insertion channel 421 and the first opening 111.

[0044] In one embodiment, the inner diameter of the end of the insertion channel 421 close to the first opening 111 is smaller than the inner diameter of the end of the insertion channel 421 away from the first opening 111, so that when the aerosol generating substrate is disposed in the insertion channel 421, the end of the insertion channel 421 away from the first opening 111 can form a first air inlet channel 60 with the aerosol generating substrate. The air inlet 41 is disposed on the inner wall of the first air inlet channel 60. A second air inlet channel 70 is provided between the first end cover 42 and the tube body 43, one end of the second air inlet channel 70 is connected to the air inlet 41, and the other end of the second air inlet channel 70 is connected to the preheating channel 50. A third air inlet channel 80 is provided between the heat exchange core 20 and the second end cover 44, one end of the air inlet channel is connected to the preheating channel 50, and the other end of the air inlet channel is connected to the heat exchange hole 21. Figure 3 As shown, the airflow enters the shell assembly 40 from the first air inlet channel 60, enters the second air inlet channel 70 through the air inlet port 41, flows to the preheating channel 50 to be heated, and then passes through the third air inlet channel 80 to enter the heat exchange hole 21, and after secondary heating in the heat exchange hole 21, flows into the aerosol to produce plugging.

[0045] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A heating component, characterized in that: include: A receiving tube, wherein the receiving tube has a receiving cavity, one end of the receiving cavity is provided with a first opening, and the first opening is used for inserting at least part of the aerosol generating matrix into the receiving cavity; a heat exchange core, wherein at least a portion of the heat exchange core is disposed on a side of the receiving cavity away from the first opening, the heat exchange core having a heat exchange hole, one end of the heat exchange hole being in communication with the outside of the heat exchange core, and the other end of the heat exchange hole being in communication with the receiving cavity; and a heating element, the heating element being disposed between the inner wall of the receiving cavity and the heat exchange core, the heating element being used to generate heat, a portion of the heat generated by the heating element being used to heat the heat exchange core, and another portion of the heat generated by the heating element being used to heat the receiving tube; The thermal conductivity of the receiving tube is h1, the thermal conductivity of the heat exchange core is h2, the thermal conductivity of the receiving tube is greater than the thermal conductivity of the heat exchange core, or the thermal conductivity of the receiving tube is less than the thermal conductivity of the heat exchange core.

2. The heating assembly according to claim 1, characterized in that 2W·m -1 ·K -1 -1 ·K -1 ,10W·m -1 ·K -1 <h2<500W·m -1 ·K -1 。​ 3. The heating assembly according to claim 1, characterized in that The heating element is arranged around the outer periphery of the heat exchange core, and the heating element is arranged in close contact with the outer side wall of the heat exchange core. The thermal conductivity of the receiving tube is smaller than the thermal conductivity of the heat exchange core.

4. The heating assembly according to claim 1, characterized in that The heating component also includes a shell component, the receiving tube is arranged inside the shell component, the shell component is provided with an air inlet, and the air inlet is connected to the heat exchange hole so that the gas entering the shell component from the air inlet can flow to the heat exchange hole; the heat exchange core is fixedly connected to the receiving tube, and the heat exchange core is spaced apart from the shell component.

5. The heating assembly according to claim 4, characterized in that The receiving tube is provided with a first clamping portion, and the heat exchange core is provided with a second clamping portion. The receiving tube and the heat exchange core are clamped together through the first clamping portion and the second clamping portion.

6. The heating assembly according to claim 4, characterized in that The air inlet is arranged on a side of the shell assembly close to the first opening, and a preheating channel is provided between the outer wall of the receiving tube and the shell assembly, one end of the preheating channel is connected to the air inlet, and the other end of the preheating channel is connected to the heat exchange hole, so that the gas entering from the air inlet can flow to the heat exchange hole through the preheating channel.

7. The heating assembly according to claim 6, characterized in that The shell assembly includes a first end cover, a tube body and a second end cover, the tube body is sleeved on the outside of the receiving tube, the first end cover is covered at one end of the tube body, and the second end cover is covered at the other end of the tube body, and the heat exchange core is closer to the second end cover than the first end cover; the air inlet is arranged on the first end cover, a preheating channel is provided between the tube body and the receiving tube, and the heat exchange core and the second end cover are spaced apart.

8. The heating assembly according to claim 7, characterized in that The first end cover has an insertion channel, one end of the insertion channel is in communication with the outside of the heating assembly, and the other end of the insertion channel is in communication with the first opening, and the insertion channel is used for the aerosol generating substrate to be inserted into the receiving cavity; The inner diameter of one end of the insertion channel close to the first opening is smaller than the inner diameter of one end of the insertion channel away from the first opening, so that when the aerosol generating substrate is arranged in the insertion channel, the end of the insertion channel away from the first opening can form a first air inlet channel with the aerosol generating substrate, and the air inlet port is arranged on the inner wall of the first air inlet channel; a second air inlet channel is provided between the first end cover and the tube body, one end of the second air inlet channel is communicated with the air inlet port, and the other end of the second air inlet channel is communicated with the preheating channel; a third air inlet channel is provided between the heat exchange core and the second end cover, one end of the air inlet channel is communicated with the preheating channel, and the other end of the air inlet channel is communicated with the heat exchange hole.

9. The heating assembly according to claim 1, characterized in that The receiving tube is configured as a receiving tube of aluminum, copper, aluminum oxide, silicon carbide or aluminum nitride, and the heat exchange core is configured as a heat exchange core of aluminum, copper, aluminum oxide, silicon carbide or aluminum nitride.

10. An aerosol generating device, characterized in that: It comprises a heating component, and the heating component is the heating component according to any one of claims 1 to 9.

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