Heating body assembly and aerosol generating device

Abstract

The utility model relates to the technical field of aerosol atomization, and provides a heating body assembly and an aerosol generating device. The heating element assembly comprises: a heating element; the heating body comprises a heating part; the heating part is used for heating an aerosol generating substrate contained in the aerosol generating device; the heating part comprises a top heating section and a residual heating section; wherein the temperature rise speed of the top heating section is higher than that of the rest heating sections. The aerosol generating device comprises a shell and the heating body assembly. According to the heating body assembly, aerosol can be rapidly provided after heating, the phenomenon that the aerosol generating substrate is excessively heated to generate burnt smell is avoided, and the aerosol generating substrate can be heated / baked more evenly. The heating element assembly can be applied to the aerosol generating device.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, and particularly relates to a heating element assembly and an aerosol generating device. Background Art

[0002] An aerosol generating device is used to atomize an aerosol generating substrate. With the development of the electronic atomization system industry, heating the aerosol generating substrate in a non-combustion heating manner and / or in an electric heating manner is currently the main way for the aerosol generating device to atomize the aerosol generating substrate. Existing aerosol generating devices usually atomize the aerosol generating substrate through a heating element assembly or an independent heating element.

[0003] However, since existing heating element assemblies or heating elements are usually in the shape of long and narrow rods or needles and need to be inserted into the interior of the aerosol generating substrate to heat the aerosol generating substrate, and the heat dissipation speed at the top of the heating element assembly or heating element is faster than that in the middle, therefore, after the heating element assembly or heating element is heated, there is usually a situation where the temperature at the top of the heating element assembly or heating element (such as when the heating element assembly or heating element has been inserted into the interior of the aerosol generating substrate) is lower than the temperature in the middle, which in turn leads to the difficulty for the top of the heating element assembly or heating element to quickly heat the aerosol generating substrate, that is, after the heating element assembly or heating element is heated, the heating element assembly or heating element cannot quickly provide the user with the aerosol generated from the aerosol generating substrate; in addition, since the heat dissipation speed at the top of the heating element assembly or heating element is faster than that in the middle, the temperature at the top of the heating element assembly or heating element is low while the temperature in the middle is high, which in turn makes the heating element assembly or heating element require a higher heating temperature to generate aerosol, and a higher heating temperature is likely to cause the aerosol generating substrate to produce a burnt smell.

[0004] Therefore, in view of the above deficiencies of the prior art, it is necessary to make improvements. Summary of the Invention

[0005] The main technical problem to be solved by the utility model is to provide a heating element assembly, an aerosol generating device and an aerosol generating system. The above heating element assembly can quickly provide aerosol after heating, avoid overheating the aerosol generating substrate to produce a burnt smell, and can also heat / bake the aerosol generating substrate more evenly. The above heating element assembly can be applied to the above aerosol generating device and aerosol generating system.

[0006] According to a first aspect, in one embodiment, a heating element assembly is provided. The heating element assembly can be applied to an aerosol generating device. The heating element assembly includes: a heating element; the heating element includes a heating portion; the heating portion is used for heating an aerosol generating substrate accommodated in the aerosol generating device; the heating portion includes a connected top heating section and a remaining heating section; wherein, when the heating portion is inserted into the interior of the aerosol generating substrate, the top heating section is inserted into the aerosol generating substrate earlier than the remaining heating section; wherein, the heating rate of the top heating section is greater than the heating rate of the remaining heating section.

[0007] In one embodiment, the remaining heating section includes a middle sub-heating section and a bottom sub-heating section, and the middle sub-heating section is located between the top heating section and the bottom sub-heating section; wherein, the heating rate of the top heating section is greater than the heating rate of the middle sub-heating section; the heating rate of the bottom sub-heating section is greater than the heating rate of the middle sub-heating section.

[0008] In one embodiment, the wall thickness of the top heating section is less than the wall thickness of the remaining heating section; and / or the ratio of the length of the remaining heating section to the length of the top heating section is greater than or equal to 1.

[0009] In one embodiment, the wall thickness of the top heating section is less than the wall thickness of the middle sub-heating section; the bottom sub-heating section is less than the wall thickness of the middle sub-heating section; and / or the ratio of the length of the middle sub-heating section to the length of the top heating section is greater than or equal to 1; the ratio of the length of the middle sub-heating section to the length of the bottom sub-heating section is greater than or equal to 1.

[0010] In one embodiment, the thermal conductivity of the top heating section is greater than the thermal conductivity of the remaining heating section.

[0011] In one embodiment, the thermal conductivity of the top heating section is greater than the thermal conductivity of the middle sub-heating section; the thermal conductivity of the bottom sub-heating section is greater than the thermal conductivity of the middle sub-heating section.

[0012] In one embodiment, an air flow channel is provided in the heating element, and the air flow channel extends in the remaining heating section and the top heating section, and a plurality of air outlets communicating with the air flow channel are provided on the outer wall of the heating portion; wherein, at least part of the air outlets are arranged in a staggered manner on the outer wall of the heating portion.

[0013] In one embodiment, the heating element includes an insulating hollow body and a heating element, the insulating hollow body includes the heating portion, and the heating element is arranged on the surface of the heating portion and is used for generating heat under the condition of being energized; or, the heating element is a conductive hollow body, and the conductive hollow body includes the heating portion; the heating portion is used for generating heat under the condition of being energized.

[0014] In one embodiment, the heating element is a conductive hollow body, and the conductive hollow body includes the heating part; the heating element assembly further includes: an electromagnetic coil disposed around the heating part; wherein, the electromagnetic coil generates an electromagnetic field under the energized condition, and the heating part generates induced heat in the electromagnetic field to heat the aerosol-forming substrate; wherein, the heating element is made of a soft magnetic material.

[0015] According to a second aspect, an aerosol generating device is provided in an embodiment, which is characterized by including: a housing having an accommodation cavity; the accommodation cavity is used for accommodating an aerosol-forming substrate; a heating element assembly, the heating element assembly being the heating element assembly according to any one of the embodiments of the present application; a power supply assembly for supplying power to the heating element assembly.

[0016] The beneficial effects of the present application are:

[0017] The heating element assembly of the present application includes: a heating element; the heating element includes a heating part; the heating part is used for heating the aerosol-forming substrate accommodated in the aerosol generating device; the heating part includes a connected top heating section and a remaining heating section; wherein, the heating rate of the top heating section is greater than that of the remaining heating section; the aerosol generating device includes: a housing and the above-mentioned heating element assembly; due to the heating rate of the top heating section being greater than that of the remaining heating section, therefore, the above-mentioned heating element assembly can not only quickly provide aerosol after heating, avoid overheating the aerosol-forming substrate to produce a burnt smell, but also heat / bake the aerosol-forming substrate more evenly; the above-mentioned heating element assembly can be applied to the above-mentioned aerosol generating device. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the heating part of the heating element of an embodiment;

[0019] Figure 2 It is a schematic structural diagram of the air outlet of the air flow channel in the heating element of an embodiment;

[0020] Figure 3 It is a schematic structural diagram of an aerosol generating device of an embodiment. Detailed Embodiments

[0021] The present utility model will be further described in detail below in conjunction with the specific embodiments and the accompanying drawings. Similar elements in different embodiments are denoted by related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. 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, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid overwhelming the core part of the present application with excessive descriptions. 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 descriptions 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 embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment and do not mean that they are the necessary sequences, unless it is stated otherwise that a certain sequence must be followed.

[0023] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).

[0024] The technical solution of the present application will be described in detail below in conjunction with the embodiments.

[0025] The present application provides a heating element assembly. The heating element assembly is applied to an aerosol generating device. The heating element assembly includes: a heating element; the heating element includes a heating part; the heating part is used to heat an aerosol generating substrate accommodated in the aerosol generating device. In the present application, the heating part is divided into a connected top heating section and a remaining heating section; wherein, the heating rate of the top heating section is greater than that of the remaining heating section.

[0026] It should be noted that when the heating part is inserted into the aerosol generating substrate, the top heating section is inserted into the aerosol generating substrate earlier than the remaining heating section.

[0027] In some embodiments, the length of the above-mentioned heating part is greater than the width or diameter of the heating part. For example, the above-mentioned heating part can be in the shape of a long and narrow rod or needle. The above-mentioned heating part can also be in other shapes.

[0028] In some embodiments, the above-mentioned heating part can directly heat the aerosol generating substrate in a heat radiation manner.

[0029] In some embodiments, there is no air flow channel inside the above-mentioned heating element or inside the heating part. That is to say, the inside of the above-mentioned heating element can be solid.

[0030] In some embodiments, there may be an air flow channel inside the above-mentioned heating element or inside the heating part. While the heating element heats the aerosol-forming substrate in a heat radiation manner, it can first heat the gaseous substance (such as air) in the air flow channel, and then input the heated gaseous substance into the inside of the aerosol-forming substrate through the outlet of the air flow channel, so as to continuously heat the aerosol-forming substrate through the heated gaseous substance. The air flow channel can extend in the remaining heating section and the top heating section. For example, the air flow channel can be cylindrical, or the air flow channel can also be in other shapes.

[0031] It should be noted that the specific setting of the above-mentioned "air flow channel" can directly adopt the existing technology, so the specific structure of the above-mentioned "air flow channel" will not be described in detail here.

[0032] It should be noted that those skilled in the art can determine the type of the above-mentioned aerosol-forming substrate according to actual needs. The aerosol-forming substrate is any suitable known compound or mixture of compounds that is convenient to form a thick and stable aerosol during use and is substantially resistant to thermal degradation at a certain temperature. The aerosol-forming substrate can be solid. Since the specific type of the aerosol-forming substrate is common knowledge in the art, the specific composition of the aerosol-forming substrate will not be described in detail.

[0033] It can be seen that in some embodiments, the present application makes the top heating section of the heating element rise to the required preset heating temperature faster than the remaining heating section after the heating part is heated by setting the heating rate of the top heating section to be greater than that of the remaining heating section, so as to avoid the situation that the temperature of the top of the heating element (such as the above-mentioned top heating section) is lower than the temperature of the middle part (such as the above-mentioned remaining heating section), and to enable the top of the heating element (such as the above-mentioned top heating section) to quickly heat the aerosol-forming substrate. That is, after the heating element assembly or the heating element is heated, the heating element assembly or the heating element can quickly provide the user with the aerosol generated by the aerosol-forming substrate; in addition, since there is no situation where the temperature of the top of the heating element (such as the above-mentioned top heating section) of the present application is lower than the temperature of the middle part (such as the above-mentioned remaining heating section), the heating element does not need a higher heating temperature, and thus it is possible to avoid overheating the aerosol-forming substrate and generating a burnt smell during the heating process of the aerosol-forming substrate as much as possible.

[0034] In some embodiments, the top heating section and the remaining heating section are integrally connected. That is to say, the top heating section and the remaining heating section can be integrally formed by the same material and process.

[0035] In some embodiments, there may be no actual demarcation line between the top heating section and the remaining heating section of the above-mentioned heating section. In the present application, the heating section is divided into the top heating section and the remaining heating section only for the convenience of explaining the technical solution of the present application.

[0036] In some embodiments, the top heating section and the remaining heating section may also be detachably connected.

[0037] Since the heating element assembly or the heating element is usually in the shape of a long and narrow rod or needle, and needs to be inserted into the interior of the aerosol-forming substrate to heat the aerosol-forming substrate, and the heating element assembly or the heating element has an air flow channel; while the heating element assembly or the heating element heats the aerosol-forming substrate in a heat radiation manner, by heating the gaseous substance (such as air) in the air flow channel, and then inputting the heated gaseous substance through the outlet of the air flow channel into the interior of the aerosol-forming substrate to continue heating the aerosol-forming substrate through the heated gaseous substance; and the bottom end of the heating element assembly or the heating element has a faster heat dissipation rate than the middle part thereof. Therefore, after the heating element assembly or the heating element is heated, there is usually a situation where the temperature of the bottom end of the heating element assembly or the heating element (such as when the heating element assembly or the heating element has been inserted into the interior of the aerosol-forming substrate) is lower than the temperature of the middle part thereof, which in turn causes the bottom end of the heating element assembly or the heating element to be unable to quickly heat the gaseous substance (such as air) in the air flow channel to the required temperature and cannot quickly generate aerosol, and the effect of continuously heating the aerosol-forming substrate through the heated gaseous substance is also poor; in addition, since the top end of the heating element assembly or the heating element has a faster heat dissipation rate than the middle part thereof, the temperature of the top end of the heating element assembly or the heating element is low while the temperature of the middle part is high, which in turn makes the heating element assembly or the heating element require a higher heating temperature to generate aerosol, and a higher heating temperature is likely to cause the aerosol-forming substrate to produce a burnt smell. Therefore, in some embodiments, please refer to Figure 1 , Figure 1 The black arrow in is used to represent the flow direction or flow path of the gaseous substance entering the air flow channel A; in the case where the heating element has the air flow channel A, the present application divides the remaining heating section 200 into a middle sub-heating section 210 and a bottom sub-heating section 220. That is to say, the heating section 10 includes a top heating section 100, a middle sub-heating section 210 and a bottom sub-heating section 220; wherein, the middle sub-heating section 210 is located between the top heating section 100 and the bottom sub-heating section 220; wherein, the heating rate of the top heating section 100 is greater than the heating rate of the middle sub-heating section 210; the heating rate of the bottom sub-heating section 220 is greater than the heating rate of the middle sub-heating section 210.

[0038] In some embodiments, the top heating section 100, the middle sub - heating section 210, and the bottom sub - heating section 220 are integrally connected. That is to say, the top heating section 100, the middle sub - heating section 210, and the bottom sub - heating section 220 can be integrally formed from the same material and process.

[0039] In some embodiments, there is no actual demarcation line among the top heating section 100, the middle sub - heating section 210, and the bottom sub - heating section 220 of the above - mentioned heating part. In this application, the heating part is divided into the top heating section 100, the middle sub - heating section 210, and the bottom sub - heating section 220 only for the convenience of explaining the technical solution of this application.

[0040] In some embodiments, the top heating section 100, the middle sub - heating section 210, and the bottom sub - heating section 220 can also be detachably connected.

[0041] It can be seen that in some embodiments, in this application, by setting the heating - up speed of the top heating section and the bottom sub - heating section to be greater than that of the middle sub - heating section, after the above - mentioned heating part is heated, the top heating section and the bottom sub - heating section of the heating element can rise to the required preset heating temperature faster than the middle sub - heating section, so as to avoid the situation where the temperature of the top end (such as the above - mentioned top heating section) and the bottom end (such as the above - mentioned bottom sub - heating section) of the heating element is lower than the temperature of its middle part (such as the above - mentioned middle sub - heating section), enabling the top end (such as the above - mentioned top heating section) of the heating element to quickly heat the aerosol - generating substrate, and enabling the bottom end (such as the above - mentioned bottom sub - heating section) of the heating element to quickly heat the gaseous substance (such as air) in the air flow channel to the required temperature, resulting in a better effect of continuously heating the aerosol - generating substrate by the heated gaseous substance.

[0042] Since the heating - up speed of the heating element is affected by various factors, such as the thermal conductivity, surface area, and mass of the heating element. Among them, the thermal conductivity of the heating element is an important factor. Heat conduction refers to the process by which thermal energy is transferred from a high - temperature region to a low - temperature region. The thermal conductivity of the heating element determines its ability to conduct heat. If the thermal conductivity of the heating element is high, it will be able to transfer heat to its surrounding environment faster, thus accelerating its heating speed. For example, the surface area of the heating element also affects the heating speed. A larger surface area means more contact surfaces and can more effectively exchange heat with the external environment. Therefore, an object with a larger surface area often heats up faster than an object with a smaller surface area. For example, the mass of the heating element also affects the heating speed. The larger the mass of the heating element, the more heat it needs to absorb, so its heating - up speed may be slower. On the contrary, a heating element with a smaller mass needs to absorb less heat, so their heating - up speed may be faster. Therefore, in some embodiments, the wall thickness of the top heating section is less than the wall thickness of the remaining heating sections.

[0043] It should be noted that when the heating element does not have an air flow channel or the interior of the heating element is solid, the above-mentioned "wall thickness" may refer to the diameter or width.

[0044] It should be noted that in this embodiment, by setting the wall thickness of the top heating section to be less than that of the remaining heating sections, the mass of the top heating section is made less than that of the remaining heating sections, so that without changing the original material and original surface (such as the area and shape of the outer surface, etc.) of the top heating section and the remaining heating sections, the heating rate of the top heating section is made greater than that of the remaining heating sections.

[0045] In some embodiments, the ratio of the length of the remaining heating sections to the length of the top heating section is greater than or equal to 1. For example, the length of the top heating section can be one-third or one-fourth of the total length of the heating part.

[0046] In some embodiments, those skilled in the art can determine the ratio of the length of the remaining heating sections to the length of the top heating section (such as the upper and lower limits of the ratio) according to actual needs, and no specific limitation is made here.

[0047] It can be seen that in some embodiments, in the present application, by setting the wall thickness of the top heating section to be less than that of the remaining heating sections, after the above-mentioned heating part is heated, the top heating section of the heating element can rise to the required preset heating temperature faster than the remaining heating sections, so as to avoid the situation that the temperature of the top end (such as the above-mentioned top heating section) of the heating element is lower than the temperature of its middle part (such as the above-mentioned remaining heating sections), and to enable the top end (such as the above-mentioned top heating section) of the heating element to quickly heat the aerosol-forming substrate, that is, after the heating element assembly or the heating element is heated, the heating element assembly or the heating element can quickly provide the user with the aerosol generated from the aerosol-forming substrate; in addition, since there is no situation in the heating element of the present application that the temperature of the top end (such as the above-mentioned top heating section) is lower than the temperature of its middle part (such as the above-mentioned remaining heating sections), therefore, the heating element does not require a higher heating temperature, and thus it is possible to avoid overheating the aerosol-forming substrate and generating a burnt smell as much as possible during the process of heating the aerosol-forming substrate.

[0048] It can be seen that in some embodiments, since after the heating element is heated for a period of time, the wall thickness of the above-mentioned remaining heating sections is greater than that of the top heating section, and under the condition that other conditions (such as material, etc.) are the same, the mass of the above-mentioned remaining heating sections is greater than that of the top heating section, that is, the heat absorbed by the above-mentioned remaining heating sections gradually increases with the passage of heating time, and a large amount of energy gradually concentrates on the remaining heating sections, so that the temperature of the above-mentioned remaining heating sections also gradually increases, thereby achieving the technical effect of heating / baking the above-mentioned aerosol-forming substrate more evenly and fully through the top heating section and the remaining heating sections.

[0049] In some embodiments, the wall thickness of the top heating section is less than that of the middle sub - heating section; the wall thickness of the bottom sub - heating section is less than that of the middle sub - heating section.

[0050] It should be noted that in this embodiment, by setting the wall thicknesses of the top heating section and the bottom sub - heating section to be less than that of the middle sub - heating section, the masses of the top heating section and the bottom sub - heating section are made less than that of the middle sub - heating section. Thus, without changing the original materials and the original outer surfaces (such as the area and shape of the outer surface, etc.) of the top heating section, the middle sub - heating section, and the bottom sub - heating section, the heating rates of the top heating section and the bottom sub - heating section are both greater than that of the remaining heating sections.

[0051] In some embodiments, the ratio of the length of the middle sub - heating section to the length of the top heating section is greater than or equal to 1;

[0052] The ratio of the length of the middle sub - heating section to the length of the bottom sub - heating section is greater than or equal to 1.

[0053] In some embodiments, those skilled in the art can determine the ratio of the length of the middle sub - heating section to the length of the top heating section (such as the upper and lower limits of this ratio), and the ratio of the length of the middle sub - heating section to the length of the bottom sub - heating section (such as the upper and lower limits of this ratio) according to actual needs, and no specific limitations are made here.

[0054] It can be seen that in some embodiments, in the present application, by setting the wall thicknesses of the top heating section and the bottom sub - heating section to be less than that of the middle sub - heating section, after the above - mentioned heating part is heated, the top heating section and the bottom sub - heating section of the heating element can rise to the required preset heating temperature faster than the middle sub - heating section, so as to avoid the situation that the temperatures of the top (such as the above - mentioned top heating section) and the bottom (such as the above - mentioned bottom sub - heating section) of the heating element are lower than the temperature of its middle part (such as the above - mentioned middle sub - heating section). This enables the top (such as the above - mentioned top heating section) of the heating element to quickly heat the aerosol - forming substrate, and enables the bottom (such as the above - mentioned bottom sub - heating section) of the heating element to quickly heat the gaseous substance (such as air) in the air flow channel to the required temperature, resulting in a better effect of continuously heating the aerosol - forming substrate by the heated gaseous substance.

[0055] It can be seen that in some embodiments, after the heating element is heated for a period of time, the wall thickness of the middle sub-heating section is greater than that of the top heating section or the bottom sub-heating section. Under the condition that other conditions (such as material) are the same, the mass of the middle sub-heating section is greater than that of the top heating section. That is, the heat absorbed by the middle sub-heating section gradually increases with the passage of heating time, and a large amount of energy gradually concentrates on the middle sub-heating section, thereby making the temperature of the middle sub-heating section gradually increase, so as to achieve the technical effect of more uniformly and fully heating / baking the aerosol-forming substrate through the top heating section, the middle sub-heating section and the bottom sub-heating section.

[0056] In some embodiments, the thermal conductivity of the top heating section is greater than that of the remaining heating section. For example, the material of the top heating section can be alumina; while the material of the remaining heating section can be zirconia. Those skilled in the art can select the materials used for the top heating section and the remaining heating section according to actual needs, and no specific limitation is provided here.

[0057] It should be noted that in this embodiment, by making the thermal conductivity of the top heating section greater than that of the remaining heating section, the heating rate of the top heating section is made greater than that of the remaining heating section.

[0058] In some embodiments, the thermal conductivity of the top heating section is greater than that of the middle sub-heating section; the thermal conductivity of the bottom sub-heating section is greater than that of the middle sub-heating section. For example, the materials of the top heating section and the bottom sub-heating section can be alumina; while the material of the middle sub-heating section can be zirconia. Those skilled in the art can select the materials used for the top heating section, the middle sub-heating section and the bottom sub-heating section according to actual needs, and no specific limitation is provided here.

[0059] It should be noted that in this embodiment, by the way that "the thermal conductivity of the top heating section is greater than that of the middle sub-heating section; the thermal conductivity of the bottom sub-heating section is greater than that of the middle sub-heating section", the heating rates of the top heating section and the bottom sub-heating section are both made greater than that of the remaining heating section.

[0060] In some embodiments, please refer to Figure 2 , the heating part 10 of the heating element has an air flow channel, and the air flow channel has an air inlet a; a plurality of air outlets b communicating with the air flow channel are arranged on the outer wall of the heating part 10. The number of the air outlets b of the air flow channel can be multiple. At least some of the air outlets are arranged in a staggered manner on the outer wall of the heating part. For example, at least some of the air outlets b are not on a straight line.

[0061] In some embodiments, the above-mentioned straight line can be the straight line where the axial center line of the air flow channel is located.

[0062] In some embodiments, the above-mentioned straight line can also be a straight line in other directions, and no specific limitation is imposed on the straight line here.

[0063] In some embodiments, multiple air outlets are all located in the top heating section.

[0064] In some embodiments, multiple air outlets are all located in the middle sub-heating section or the remaining heating section.

[0065] In some embodiments, some of the multiple air outlets are located in the middle sub-heating section or the remaining heating section, and the other part is located in the top heating section.

[0066] It can be seen that in some embodiments, by misaligning and distributing some of the air outlets on the surface of the heating part, on the one hand, the path of the gaseous substance from entering the air flow channel to flowing out of the air flow channel can be lengthened, and on the other hand, the gaseous substance flowing in the air flow channel can be made to have turbulent flow, thereby further enhancing the heating effect of the heating part on the gaseous substance in the air flow channel, and finally achieving the effect of enhancing the heating of the above-mentioned gaseous substance on the aerosol-forming substrate after heating.

[0067] In some embodiments, the heating element further includes a connecting part, which is used to connect with other components in the aerosol generating device to fix the heating element in the aerosol generating device; wherein, the connecting part is integrally connected or detachably connected to the heating part.

[0068] It should be noted that those skilled in the art can determine the specific categories of the above-mentioned "other components" according to actual needs. For example, the above-mentioned "other components" can be a special base, or other structures in the aerosol generating device, such as a housing, etc. No specific limitation is imposed on other components here.

[0069] In some embodiments, the air inlet of the air flow channel is located in the connecting part, and the air outlet of the air flow channel is located in the heating part.

[0070] In one embodiment, the heating element heats the aerosol-forming substrate by a central needle type heating method. Specifically, the heating element is rod-shaped or sheet-shaped. The rod-shaped heating element is a hollow structure to form an air flow channel. Alternatively, the sheet-shaped heating element has a certain thickness to facilitate the formation of an air flow channel.

[0071] In some embodiments, the heating element includes an insulating hollow body and a heating element. The insulating hollow body includes the above-mentioned heating part. The heating element is arranged on the surface of the heating part and is used to generate heat under the condition of being powered on. Specifically, the insulating hollow body is used to form an air flow channel and is used inside the aerosol-forming substrate; the heating element is arranged on the heating part of the insulating hollow body by means of coating, screen printing, etc., and is used to generate heat under the condition of being powered on to heat the aerosol-forming substrate.

[0072] In some embodiments, the heating element is a conductive hollow body, and the conductive hollow body includes the above-mentioned heating part; the heating part is used to generate heat under the condition of being energized. Specifically, the conductive hollow body is used to form an air flow channel and is used to connect to the inside of the aerosol-forming substrate; the conductive hollow body can generate heat under the condition of being energized to heat the aerosol-forming substrate.

[0073] In some embodiments, the heating element is a conductive hollow body, and the conductive hollow body includes the above-mentioned heating part; the heating element assembly further includes: an electromagnetic coil disposed around the heating part, wherein the electromagnetic coil generates an electromagnetic field under the condition of being energized, and the heating part generates induced heat in the electromagnetic field to heat the aerosol-forming substrate. Among them, the heating element is made of a soft magnetic material. For example, the heating element can be SUS430 (a model of stainless steel) or SPCE (a steel grade), etc.

[0074] The above is the description of a heating element assembly. Some embodiments of the present application also disclose an aerosol generating device. Please refer to Figure 3 , the aerosol generating device includes:

[0075] A housing 1 having a receiving cavity 11; the receiving cavity is used to receive the aerosol-forming substrate 12;

[0076] A heating element assembly 2, which is the heating element assembly in any one of the embodiments of the present application;

[0077] A power supply assembly 3 for supplying power to the heating element assembly.

[0078] The above-mentioned housing 1 and power supply assembly 3 can both adopt the existing technologies in the art, so the description thereof will not be repeated here. Those skilled in the art can also install the power supply assembly 3 at other positions inside the aerosol generating device according to actual needs.

[0079] In some embodiments, the aerosol generating device further includes a base 4 and an electromagnetic coil 5. The electromagnetic coil 5 is disposed around the heating element assembly 2. The electromagnetic coil 5 generates an electromagnetic field under the condition of being energized, and the heating element assembly 2 generates induced heat in the electromagnetic field to heat the aerosol-forming substrate 12. The heating element assembly 2 is installed on the base 4.

[0080] It should be noted that those skilled in the art can determine the positional relationship and connection relationship among the above-mentioned housing, heating element assembly and power supply assembly according to actual needs. The positional relationship and connection relationship among the above-mentioned housing, heating element assembly and power supply assembly can be determined according to the existing technologies, so the description thereof will not be repeated here. Those skilled in the art can also add other components and / or structures to the aerosol generating device according to actual needs.

[0081] The above is a description of an aerosol generating device. In some embodiments of the present application, an aerosol generating system is also disclosed. The aerosol generating system includes: an aerosol generating device; the aerosol generating device is the aerosol generating device in any one of the embodiments of the present application; an aerosol generating substrate, at least partially disposed in the accommodating cavity.

[0082] The above-mentioned aerosol generating substrate can adopt the prior art in the art, so it will not be elaborated here.

[0083] It should be noted that those skilled in the art can determine the positional relationship and connection relationship between the above-mentioned aerosol generating device and the aerosol generating substrate according to actual needs. The positional relationship and connection relationship between the above-mentioned aerosol generating device and the aerosol generating substrate can also be determined according to the prior art, so it will not be elaborated here. Those skilled in the art can also add other components (such as atomizers, etc.), products, and / or structures to the aerosol generating system according to actual needs.

[0084] This document has been described with reference to various exemplary embodiments. However, those skilled in the art will recognize that changes and modifications can be made to the exemplary embodiments without departing from the scope of this document. For example, various operation steps and the components used to perform the operation steps can be implemented in different ways according to a specific application or considering any number of cost functions associated with the operation of the system (e.g., one or more steps can be deleted, modified, or combined into other steps).

[0085] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. Additionally, as understood by those skilled in the art, the principles herein can be embodied in a computer program product on a computer-readable storage medium, which is preloaded with computer-readable program code. Any tangible, non-transitory computer-readable storage medium can be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD-ROMs, DVDs, Blu-ray discs, etc.), flash memories, and / or the like. These computer program instructions can be loaded onto a general-purpose computer, a special-purpose computer, or other programmable data processing devices to form a machine, such that the instructions executed on the computer or other programmable data processing devices can generate a device for implementing the specified functions. These computer program instructions can also be stored in a computer-readable memory, which can direct the computer or other programmable data processing devices to operate in a specific manner, so that the instructions stored in the computer-readable memory can form a manufactured article, including a device for implementing the specified functions. The computer program instructions can also be loaded onto a computer or other programmable data processing devices, thereby performing a series of operational steps on the computer or other programmable devices to generate a computer-implemented process, such that the instructions executed on the computer or other programmable devices can provide steps for implementing the specified functions.

[0086] Although the principles herein have been shown in various embodiments, many modifications of the structures, arrangements, proportions, elements, materials, and components, which are particularly adapted to specific environments and operational requirements, can be used without departing from the principles and scope of this disclosure. The above modifications and other changes or revisions will be included within the scope of this disclosure.

[0087] The foregoing detailed description has been described with reference to various embodiments. However, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of this disclosure. Therefore, the consideration of this disclosure will be in an illustrative rather than a restrictive sense, and all such modifications will be included within its scope. Similarly, the advantages, other advantages, and solutions to problems of the various embodiments have been described above. However, the benefits, advantages, solutions to problems, and any elements that can produce these, or solutions that make them more explicit, should not be construed as critical, essential, or necessary. The term "comprising" and any other variants used herein are non-exclusive inclusions, such that a process, method, article, or device that includes a list of elements not only includes those elements but also other elements not expressly listed or belonging to the process, method, system, article, or device. Additionally, the term "coupled" and any other variants used herein refer to physical connection, electrical connection, magnetic connection, optical connection, communication connection, functional connection, and / or any other connection.

[0088] Those skilled in the art will recognize that many changes can be made to the details of the above embodiments without departing from the basic principles of the present utility model. Therefore, the scope of the present utility model should be determined only by the claims.

Claims

1. A heating element assembly, applied to an aerosol generating device, characterized in that: include: Heating body; The heating element comprises a heating portion; the heating portion is used to heat the aerosol generating substrate contained in the aerosol generating device; the heating portion comprises a top heating section and a remaining heating section connected to each other; Wherein, when the heating portion is inserted into the interior of the aerosol generating substrate, the top heating section is inserted into the aerosol generating substrate before the remaining heating sections; Wherein, the heating rate of the top heating section is greater than the heating rate of the remaining heating sections.

2. The heating element assembly according to claim 1, characterized in that: The remaining heating section includes a middle heating sub-section and a bottom heating sub-section, and the middle heating sub-section is located between the top heating section and the bottom heating sub-section; Among them, the heating rate of the top heating section is greater than the heating rate of the middle sub-heating section; the heating rate of the bottom sub-heating section is greater than the heating rate of the middle sub-heating section.

3. The heating element assembly according to claim 1, characterized in that: The wall thickness of the top heating section is smaller than the wall thickness of the remaining heating section; and / or the ratio of the length of the remaining heating section to the length of the top heating section is greater than or equal to 1.

4. The heating element assembly according to claim 2, characterized in that: The wall thickness of the top heating segment is smaller than the wall thickness of the middle sub-heating segment; the wall thickness of the bottom sub-heating segment is smaller than the middle sub-heating segment; and / or the ratio of the length of the middle sub-heating segment to the length of the top heating segment is greater than or equal to 1; the ratio of the length of the middle sub-heating segment to the length of the bottom sub-heating segment is greater than or equal to 1.

5. The heating element assembly according to claim 1, characterized in that: The thermal conductivity of the top heating section is greater than the thermal conductivity of the remaining heating sections.

6. The heating element assembly according to claim 2, characterized in that: The thermal conductivity of the top heating segment is greater than the thermal conductivity of the middle heating segment; the thermal conductivity of the bottom heating segment is greater than the thermal conductivity of the middle heating segment.

7. The heating element assembly according to any one of claims 1 to 6, characterized in that: The heating body has an air flow channel therein, and the air flow channel extends in the remaining heating section and the top heating section. A plurality of air outlets connected to the air flow channel are arranged on the outer wall of the heating section; wherein at least some of the air outlets are staggered on the outer wall of the heating section.

8. The heating element assembly according to any one of claims 1 to 6, characterized in that: The heating body includes an insulating hollow body and a heating element, the insulating hollow body includes the heating part, the heating element is arranged on the surface of the heating part and is used to generate heat when power is turned on; or, the heating body is a conductive hollow body, the conductive hollow body includes the heating part; the heating part is used to generate heat when power is turned on.

9. The heating element assembly according to any one of claims 1 to 6, characterized in that: The heating element is a conductive hollow body, and the conductive hollow body includes the heating part; the heating element assembly also includes: an electromagnetic coil, which is arranged around the heating part; wherein the electromagnetic coil generates an electromagnetic field when powered, and the heating part generates induced heat in the electromagnetic field to heat the aerosol generating matrix; wherein the heating element is made of soft magnetic material.

10. An aerosol generating device, characterized in that: include: The housing has a receiving cavity; the receiving cavity is used to receive the aerosol generating matrix; A heating element assembly, wherein the heating element assembly is the heating element assembly according to any one of claims 1 to 9; A power supply component is used to supply power to the heating element component.

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