Heating element, heating assembly, and aerosol-generating device

Abstract

The application provides a heating body, a heating assembly and an aerosol generating device, and relates to the technical field of aerosol generation. The heating body comprises a heat conductor and a heating film. The heat conductor has a head end for inserting an aerosol generating substrate and a tail end for being exposed outside the aerosol generating substrate, and the heat conductor has a hollow inner cavity. The heating film is at least partially covered on the inner wall surface of the inner cavity and is used for heating the heat conductor. Compared with the scheme of arranging a resistance wire on the outer surface of the heating body or performing thick film printing on the outer surface of the heating body in the prior art, the scheme provided in the embodiment of the application can make the size of the entire heating body smaller, so that the heating body can be applied to narrow positions or places with a high width-depth ratio, the application scenarios of the heating body are widened, and the problem of the limited application scenarios of the heating body in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, specifically to heating elements, heating components, and aerosol generation devices. Background Technology

[0002] An aerosol generating device is a device that heats an aerosol generating matrix to convert it into inhalable aerosols. In related technologies, a heating element is typically used to heat the aerosol generating matrix. However, existing heating elements usually employ resistance wires or thick-film printing technology, which results in a large overall size, making it difficult to apply in confined spaces or areas with high aspect ratios. This limits the application of heating elements in some precision equipment. Utility Model Content

[0003] The purpose of this application is to provide a heating element, heating component, and aerosol generating device to improve the problem that current heating elements are too large and difficult to apply in narrow locations or places with high aspect ratios.

[0004] On one hand, this application provides a heating element applied to a heating assembly for heating an aerosol generating matrix by insertion into the matrix. The heating element includes a heat conductor and a heating film. The heat conductor has a head end for insertion into the aerosol generating matrix and a tail end for protruding from the matrix, and has a hollow inner cavity. The heating film at least partially covers the inner wall of the inner cavity for heating the heat conductor.

[0005] In one embodiment, the tail end has a tail end opening communicating with the inner cavity.

[0006] In one embodiment, the heat conductor includes a body and a base, the base being located at the tail end, the radial dimension of the base being larger than the radial dimension of the body, and the tail end opening being located on the base.

[0007] In one embodiment, a portion of the heating film covers the side of the base facing away from the body.

[0008] In one embodiment, the head end has a conical structure.

[0009] In one embodiment, the heat conductor is integrally formed; and / or, the head end and the tail end are detachably connected.

[0010] In one embodiment, the heating film is a deposited sputtered film.

[0011] On the other hand, embodiments of this application also provide a heating assembly for use in an aerosol generating apparatus, including a heating element as described above; the heating assembly has a heating cavity for inserting an aerosol generating matrix, and the heating element is inserted into the heating cavity.

[0012] In another aspect, embodiments of this application also provide an aerosol generating apparatus, including a housing and a heating component as described above, wherein the heating component is disposed within the housing.

[0013] In another aspect, embodiments of this application also provide an aerosol generating device, including a housing and a heating assembly. The heating assembly includes a heating element with a base as described above. The heating assembly has a heating cavity for inserting an aerosol generating matrix, and the heating element is inserted into the heating cavity. The heating assembly further includes a first fixing member and a second fixing member, and the base is sandwiched between the first fixing member and the second fixing member.

[0014] In one embodiment, the first fixing member forms at least a portion of the heating cavity, and an opening is provided at the part of the first fixing member that contacts the heating element, the opening communicating with the heating cavity.

[0015] According to the heating element in the above embodiments, by setting the heating element as a hollow structure and setting a heating film in the hollow cavity, compared with the traditional technology of setting a resistance wire on the outer surface of the heating element or performing thick film printing on the outer surface of the heating element, the solution provided by the embodiments of this application can make the overall size of the heating element smaller. This allows the heating element to be applied in narrow locations or places with a high aspect ratio, broadening the application scenarios of the heating element and solving the problem of limited application scenarios of heating elements in the prior art. Applying the above-mentioned heating element to a heating assembly can also solve the above problems. Applying the above-mentioned heating assembly to an aerosol generating device can also solve the above problems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a heating element provided in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the structure of a heating element from another perspective, provided in an embodiment of this application.

[0018] Figure 3 A cross-sectional view of a heating element provided in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the structure of an aerosol generating device after installing an aerosol generating matrix, provided in an embodiment of this application.

[0020] Figure 5This is a cross-sectional view of an aerosol generating device after the aerosol generating matrix has been installed, as provided in an embodiment of this application.

[0021] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0022] in:

[0023] 1. Heating element; 10. Heat conductor; 110. Head end; 120. Tail end; 121. Tail end opening; 130. Body; 140. Base; 150. Head; 160. Inner cavity; 20. Heating film;

[0024] 2. Heating assembly; 210. First fixing member; 211. Heating chamber; 212. Opening; 220. Second fixing member; 221. Airflow chamber;

[0025] 3. Aerosol generating device; 310. Shell;

[0026] 4. Aerosol generation matrix. Detailed Implementation

[0027] The present application will be further described in detail below with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0028] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0029] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0030] Please also refer to Figures 1-3This application provides a heating element 1, which is applied to a heating assembly 2 and inserted into an aerosol generating matrix 4 to heat the aerosol generating matrix 4. The heating element 1 includes a heat conductor 10 and a heating film 20, wherein the heating film 20 at least partially covers the inner wall of the inner cavity 160.

[0031] Please see Figure 1 In this embodiment, the heat conductor 10 has a head end 110 for insertion into the aerosol generating matrix 4 and a tail end 120 for protruding outside the aerosol generating matrix 4. The heat conductor 10 also has a hollow inner cavity 160. This application does not limit the specific structure and form of the heat conductor 10.

[0032] For example, this application does not limit the specific structure and form of the head end 110. In one embodiment, the head end 110 or a portion thereof may be a conical structure, which facilitates the head end 110 penetrating into the aerosol generating matrix 4. In a more specific embodiment, the head end 110 may also be rounded, which can avoid or reduce the possibility of injury to the user during production and assembly, thereby improving production and assembly efficiency. It is understood that in other embodiments, the head end 110 may also be a threaded structure, which can also facilitate the head end 110 penetrating into the aerosol generating matrix 4. For ease of explanation, the following description uses a conical structure for the head end 110 as an example.

[0033] In addition, in some embodiments, the head end 110 can be configured as a hollow structure or a solid structure. When the head end 110 is configured as a hollow structure, the weight of the entire heat conductor 10 can be reduced, and materials can be saved to reduce costs. In this case, the material selected for the head end 110 needs to have stronger rigidity to avoid or reduce the possibility of damage to the head end 110 during the process of penetrating the aerosol generation matrix 4.

[0034] In a more specific embodiment, when the head end 110 is configured as a hollow structure, it can be connected to the inner cavity 160, which can increase the internal space of the inner cavity 160, thereby increasing the inner wall area of ​​the inner cavity 160, and thus allowing more heating films 20 to be provided on the inner wall of the inner cavity 160, thereby improving the atomization efficiency.

[0035] It is understandable that when the head end 110 is set to a solid structure, although this increases the overall mass of the heat conductor 10, in this embodiment, the head end 110 can be made of a material with relatively low structural strength, which can also reduce material costs. The specific form of the head end 110 can be set according to the actual situation and is not limited here.

[0036] For example, this application does not limit the specific structure and form of the tail end 120. In one embodiment, the tail end 120 can be a cylindrical structure or a platform-shaped structure, etc., and can be set according to the actual situation. As mentioned above, when the tail end 120 is set as a cylindrical structure, its diameter can be the same as the diameter of the head end 110. This allows the outer surface of the heat conductor 10 to fully contact the interior of the aerosol generating matrix 4 after it is inserted into the aerosol generating matrix 4, thereby improving the atomization efficiency.

[0037] Please continue reading. Figure 1 When the tail end 120 or a portion thereof is provided with a platform-like structure, the diameter of the platform at the connection between the tail end 120 and the head end 110 can be the same as the diameter of the head end 110, and the diameter of the platform of the tail end 120 away from the head end 110 can be larger than the diameter of the head end 110. This allows the heat conductor 10 to have a larger contact area with the aerosol generating matrix 4 after it penetrates into the interior of the aerosol generating matrix 4, thereby improving the atomization efficiency.

[0038] Furthermore, the embodiments of this application do not limit the specific formation method of the heat conductor 10. For example, in one embodiment, the head end 110 and the tail end 120 of the heat conductor 10 can be integrally formed, which is beneficial to improving the structural consistency of the entire heat conductor 10 and thus improving the structural strength of the entire heat conductor 10. In another embodiment, the head end 110 and the tail end 120 of the heat conductor 10 can be detachably connected.

[0039] Furthermore, in one embodiment, the tail end 120 has a tail end opening 121 communicating with the inner cavity 160, through which the user can install a heating film 20 on the inner wall of the inner cavity 160. It is understood that the tail end opening 121 reduces the overall structural strength of the heat conductor 10. However, since the tail end opening 121 is located at the tail end 120, the structural strength at this point has a relatively small impact on the heat conductor 10's penetration into the aerosol generation matrix 4. This allows the user to easily install the heating film 20 on the inner wall of the inner cavity 160 while minimizing the impact on the overall structural strength of the heat conductor 10. In addition, in some other optional embodiments, the opening for facilitating the installation of the heating film 20 on the inner wall of the inner cavity 160 can be located at the head end 110 of the heat conductor 10 or on the side between the head end 110 and the tail end 120. In these embodiments, the same effect of facilitating the user to install the heating film 20 on the inner wall of the inner cavity 160 can be achieved.

[0040] Please also refer to Figure 2 and Figure 3In one embodiment, the heat conductor 10 includes a body 130 and a base 140, wherein the base 140 is located at the tail end 120, and the end of the body 130 away from the base 140 is the head end 110. In this embodiment, the base 140 can be used to support the body 130 and to fix and support the body 130. In a specific embodiment, the base 140 can be configured as a disc-shaped structure, and the radial dimension of the outer peripheral surface of the base 140 is larger than the radial dimension of the outer peripheral surface of the body 130, so that the projection of the body 130 in the vertical direction can fall entirely within the projection of the base 140 in the vertical direction. It is understood that in some other embodiments, the base 140 can also be configured as a square disc or other disc-shaped structure, which can be set according to the actual situation.

[0041] Furthermore, in one embodiment, the base 140 can be coaxially arranged with the body 130, which can further improve the structural stability of the entire heat conductor 10 and avoid or reduce the possibility of damage caused by uneven force on the heat conductor 10 due to the shift of the center of gravity after the heat conductor 10 is embedded in the aerosol generation matrix 4.

[0042] It should be noted that the axial length of the base 140 is not limited in this embodiment. In this embodiment, the axial length of the base 140 is less than the axial length of the body 130. This makes the center of gravity of the entire heat conductor 10 closer to the base 140, thereby making the center of gravity of the entire heat conductor 10 lower, which is beneficial to improving the structural stability of the heat conductor 10.

[0043] In this embodiment, the specific structure of the base 140 is not limited. As mentioned above, in one implementation, the base 140 can be a part of the tail end 120 or the entire tail end 120. When the base 140 is the entire tail end 120, please refer to the relevant description of the tail end 120 above, which will not be repeated here. When the base 140 is a part of the tail end 120, the portion of the body 130 near the base 140 together with the base 140 constitutes the tail end 120 of the heat conductor 10.

[0044] Furthermore, in one embodiment, the tail opening 121 is located on the base 140. That is, in this embodiment, the tail opening 121 can serve as the opening of the inner cavity 160. In other words, in this embodiment, the inner cavity 160 is configured to communicate with the outside, which facilitates airflow exchange between the inner cavity 160 and the outside, thereby avoiding or reducing the possibility of excessively high local parts in the inner cavity 160 causing the aerosol generation matrix 4 to burn.

[0045] Meanwhile, in another embodiment, the tail opening 121 can be located near the base 140 of the body 130. In this embodiment, the base 140 can be a complete disc-shaped structure. That is, in this embodiment, the base 140, in addition to fixing and supporting the body 130, also seals the tail opening 121. In this embodiment, the inner cavity 160 is in a closed state, which allows heat to continuously accumulate in the inner cavity 160 and be transferred to the heat conductor 10, thereby transferring the heat to the aerosol generating matrix 4, improving the speed at which the heating element 1 heats to the specified temperature, and resulting in high energy utilization. It is understood that the specific form of the base 140 structure can be set according to the actual situation and is not limited here.

[0046] Furthermore, the base 140 can be integrally formed with the body 130, or the base 140 can be detachably connected to the body 130. When the base 140 and the body 130 are integrally formed, the structural consistency of the entire heat-conducting component can be improved, thereby increasing the structural strength of the entire heat-conducting component. When the base 140 and the body 130 are detachably connected, it is convenient for users to assemble the heat-conducting component. It should be noted that the embodiments of this application do not limit the specific form of the aforementioned detachable connection, such as it can be a snap-fit ​​or threaded connection, etc., and can be set according to the actual situation.

[0047] Furthermore, in one embodiment, a portion of the heating film 20 covers the side of the base 140 facing away from the main body 130. That is, in this embodiment, the heating film 20 has two parts, one part is disposed on the inner wall surface of the inner cavity 160, and the other part is disposed on the bottom surface of the base 140. This allows all areas of the heat conductor 10 to be heated synchronously during the heating process by the heating film 20, thereby making the temperature change of the entire heating body 1 more uniform. This not only improves the service life of the entire heating body 1, but also makes the temperature change of the part in contact with the heat conductor 10 in the aerosol generation mechanism more uniform during the heating process, which is beneficial to improve atomization and enhance the inhalation taste of the generated aerosol.

[0048] Furthermore, when the heating film 20 is provided on the side of the base 140 facing away from the body 130, it is convenient to lead the wires for powering the heating film 20 out from the heat conductor 10. It should be noted that in the embodiments of this application, the thickness of the heating film 20 is in the nanometer range. For example, in a specific embodiment, the thickness of the heating film 20 can be set to 50nm. Compared with leading the wires directly out from the inner cavity 160, the space required to lead the wires out from the side of the base 140 facing away from the body 130 is smaller, which can further reduce the size of the entire heating element 1.

[0049] Please continue reading. Figure 2 and Figure 3 In some other embodiments, the heat conductor 10 may further include a tie head 150, which may be connected to the side of the body 130 away from the base 140. In this embodiment, the tie head 150 is located at the head end 110 of the heat conductor 10. Similarly, in this embodiment, the head end 110 of the heat conductor 10 may be formed by the tie head 150, or it may be formed by the tie head 150 and the body 130 adjacent to the tie head 150.

[0050] When the head 110 of the heat conductor 10 is composed of a head 150, the relevant description of the head 110 of the heat conductor 10 described above can be referred to, and no limitation is made here. When the head 110 of the heat conductor 10 is composed of a head 150 and a body 130 adjacent to the head 150, the following description can be referred to.

[0051] In this embodiment, similar to the connection between the tie head 150 and the body 130, the tie head 150 can also be integrally formed with the body 130, or the tie head 150 can be detachably formed with the body 130. When the tie head 150 and the body 130 are integrally formed, the structural consistency of the entire heat-conducting component can be improved, thereby improving the structural strength of the entire heat-conducting component. When the tie head 150 and the body 130 are detachably connected, it is convenient for users to assemble the heat-conducting component. It should be noted that the embodiments of this application do not limit the specific form of the aforementioned detachable connection. For example, it can be a snap-fit ​​or threaded connection, etc., and can be set according to the actual situation.

[0052] When the tie head 150 and the body 130 are connected in a detachable manner, the tail end 120 may or may not have a tail end opening 121. If the tail end opening 121 is not provided, the opening can be provided at the end of the body 130 near the tie head 150. The user can place the heating film 20 on the inner wall of the inner cavity 160 through this opening, and then connect the tie head 150 to the body 130 to realize the installation of the heat conductor 10. In this embodiment, since the tail end opening 121 is not provided, the structural strength of the entire heat conductor 10 is higher, which is beneficial to improving the service life of the entire heat conductor 10.

[0053] This application does not limit the specific structure and form of the heating film 20. For example, in one embodiment, the heating film 20 is a deposited sputtered film, that is, in this embodiment, the heating film 20 is a thin film formed on the inner wall of the inner cavity 160 by sputtering deposition technology. In a more specific embodiment, physical vapor deposition (PVD) or chemical vapor deposition (CVD) technology can be used to coat the inner wall surface of the inner cavity 160. A photomask can be used to set the specific shape of the heating film 20, for example, it can be a mesh.

[0054] The following is an example of how the heating film 20 is deposited on the heat conductor 10 in an embodiment of this application:

[0055] First, a high-temperature resistant quartz needle is selected as the substrate for the heating element. The quartz needle is hollowed out and has an inner cavity with a diameter of 2 mm. The temperature resistance of this quartz needle is greater than 800℃. Furthermore, an ITO ceramic target with a purity of 99% is selected as the raw material for the electroplating film; for example, an In₂O₃:SnO₂ ratio of 90:10wt% can be used.

[0056] The quartz needles were then pretreated by ultrasonic cleaning using acetone, ethanol, and deionized water as cleaning agents for 10 minutes. Next, plasma etching of the substrate surface was performed at 200W power for 5 minutes in an Ar2 atmosphere to improve the adhesion of the target material to the quartz needles.

[0057] Next, the inner cavity of the quartz needle is evacuated to a value less than or equal to 5 × 10⁻⁶. -4 Pa, and heat the quartz needle to 300°C, then hold it at that temperature for 30 minutes to eliminate thermal stress.

[0058] Then, a sputtering deposition process was employed under the following conditions: Ar2 gas (99.999% purity) and O2 (99.99% purity) at a flow ratio of Ar2:O2 = 40:1 sccm, a sputtering pressure of 0.5 Pa, and a DC power supply with a power density set to 3 W / cm². 2 Furthermore, the inner cavity is sputtered at a distance of 80mm from the quartz needle for 60 minutes to make the heating film thickness about 200nm, thus obtaining the heating element.

[0059] The heating element was then annealed for 30 minutes in an O2 atmosphere at a pressure of 10 Pa to promote the growth of heating film grains and reduce the resistivity of the heating film.

[0060] Next, a 1μm thick silver electrode is deposited at the edge of the heating film using a mask to form a circuit. Then, a 50nm thick high-temperature resistant SiO2 protective layer is applied to the entire surface of the quartz needle to improve the oxidation resistance of the entire heating element.

[0061] In summary, the heating element 1 provided in this application embodiment, by setting the heat conductor 10 as a hollow structure and setting the heating film 20 in the hollow inner cavity 160, compared with the conventional technology of setting the resistance wire on the outer surface of the heating element 1 or performing post-molding on the outer surface of the heating element 1, can make the size of the entire heating element 1 smaller. This allows the heating element 1 to be applied in narrow positions or places with a high aspect ratio, thus improving the application scenarios of the heating element 1 and solving the problem of the limited application scenarios of the heating element 1 in the prior art.

[0062] Please see Figure 4 and Figure 5 This application also provides an aerosol generating device 3, which includes a housing, a circuit assembly, and a heating assembly 2. Both the heating assembly 2 and the circuit assembly are disposed within the housing, and the heating assembly 2 is electrically connected to the circuit assembly. The heating assembly 2 includes a heating element 1 as described above, a first fixing member 210, and a second fixing member 220. The first fixing member 210 and the second fixing member 220 clamp the heating element 1 and are used to fix the heating element 1.

[0063] For example, in this embodiment, the heat conductor 10 of the heating element 1 has a base 140, and the base 140 has a tail opening 121. The first fixing member 210 and the second fixing member 220 are respectively disposed on both sides of the base 140 and clamp the base 140 to fix the heating element 1.

[0064] Please see Figure 6 The first fixing member 210 has a heating cavity 211 for inserting the aerosol generating matrix 4. A portion of the heating element 1 extends into the heating cavity 211. Specifically, the head end 110 of the heat conductor 10 can extend into the heating cavity 211. This application does not limit the specific structure and form of the heating cavity 211. For example, in one embodiment, the heating cavity 211 can be set as a cylindrical chamber so that the shape of the heating cavity 211 matches the shape of the aerosol generating matrix 4. When the aerosol generating matrix 4 is inserted into the heating cavity 211, the aerosol generating matrix 4 is roughly attached to the inner wall of the heating cavity 211 to prevent the aerosol generating matrix 4 from swinging after being inserted into the heating cavity 211, thereby facilitating the insertion of the heating element 1 into the aerosol generating matrix 4.

[0065] In one specific embodiment, the axis of the heat conductor 10 is coaxial with the axis of the heating chamber 211. Since the aerosol generating matrix 4 is approximately coaxial with the heating chamber 211 after it is inserted into the heating chamber 211, the above arrangement can make the aerosol generating matrix 4 approximately coaxial with the heat conductor 10. This allows the temperature changes in various regions of the aerosol generating matrix 4 to tend to be the same after the heating element 1 is inserted into the aerosol generating matrix 4, which is beneficial to improving the atomization efficiency.

[0066] Furthermore, in one embodiment, the bottom of the first fixing member 210, where it contacts the heating element 1, is provided with an opening 212. It is understood that since the heating film 20 is disposed on the inner wall surface of the inner cavity 160 of the heat conductor 10, the heat generated by the heating film 20 needs to be transferred to the heat conductor 10 first, and then to the aerosol generating matrix 4 and utilized by the aerosol generating matrix 4. In this embodiment, since the first fixing member 210 is provided with an opening 212 at its bottom, it can reduce the contact area between the bottom of the first fixing member 210 and the heat conductor 10, thereby reducing the amount of heat transferred from the heat conductor 10 to the first fixing member 210. This allows the heat generated by the heating element 1 to be transferred to the heat conductor 10 as much as possible. At the same time, the heat conductor 10 can transfer heat into the heating cavity 211 through the opening 212, which is beneficial to improving the energy utilization rate of the heating element 1. Furthermore, in this embodiment, a portion of the opening 212 is also used to connect the heating chamber 211 with the external environment, so as to realize the airflow exchange within the heating chamber 211 and avoid or reduce the risk of explosion caused by excessively high air pressure within the heating chamber 211 due to heating.

[0067] The second fixing member 220 has an airflow cavity 221, the opening of which is opposite to the tail opening 121. This allows the inner cavity 160 of the heat conductor 10 to communicate with the airflow cavity 221. When the heating film 20 heats up, the temperature of the heat conductor 10 rises rapidly, and the temperature in the inner cavity 160 rises rapidly as well. Since the space of the inner cavity 160 is very limited, the air pressure in the inner cavity 160 will rise rapidly, which may cause a safety hazard of explosion inside the heat conductor 10. Therefore, in this embodiment, the airflow cavity 221 can play a role in balancing the pressure. That is to say, the setting of the airflow cavity 221 is equivalent to increasing the volume of the inner cavity 160. When a certain amount of temperature accumulates in the inner cavity 160, the pressure rise in the inner cavity 160 is relatively low, thereby avoiding or reducing the possibility of explosion caused by the inside of the heat conductor 10.

[0068] Furthermore, since the second fixing member 220 has an airflow cavity 221, the arrangement of the airflow cavity 221 can also reduce the contact area between the second fixing member 220 and the heating element 1, thereby improving the energy utilization rate of the heating element 1. In addition, in some embodiments, the diameter of the opening of the airflow cavity 221 can be set to be slightly larger than the diameter of the opening of the inner cavity 160, which can further reduce the contact area between the second fixing member 220 and the heating element 1, and further improve the energy utilization rate of the heating element 1.

[0069] This application does not limit the specific structure and form of the airflow cavity 221. For example, in one embodiment, the airflow cavity 221 can be configured as a columnar cavity. This embodiment can reduce the difficulty of mold production for the second fixing member 220 and help reduce costs. In another embodiment, the airflow cavity 221 can also be configured as a platform-shaped cavity. This embodiment can further increase the volume of the airflow cavity 221, thereby further avoiding or reducing the problem of explosion caused by high pressure in the inner cavity 160. The specific configuration can be set according to the actual situation and is not limited here.

[0070] It is understood that in some embodiments, both the first fixing member 210 and the second fixing member 220 can be made of heat-insulating material. This can avoid or reduce the transfer of heat from the first fixing member 210 and the second fixing member 220 to other areas of the aerosol generating device 3, such as the housing or circuit components. This can avoid or reduce the problem of burns caused by the user holding the housing of the aerosol generating device 3, and can also avoid or reduce the possibility of high-temperature damage to the circuit components inside the housing.

[0071] In summary, since the heating component 2 and aerosol generating device 3 provided in this application embodiment use the aforementioned heating element 1, the size of the heating component 2 provided in this application embodiment can also be set to be smaller, allowing the heating component 2 to be installed in a more confined space. Furthermore, the size of the aerosol generating device 3 provided in this application embodiment can also be set to be smaller. The above specific examples are used to illustrate this application only to aid in understanding it and are not intended to limit the scope of this application. Those skilled in the art to which this application pertains can make several simple deductions, modifications, or substitutions based on the ideas of this application.

Claims

1. A heating element, applied in a heating assembly, for inserting into an aerosol generating matrix to heat the aerosol generating matrix, characterized in that, The heating element includes: A heat conductor having a head end for insertion into the aerosol generating matrix and a tail end for protruding from the aerosol generating matrix, the heat conductor having a hollow inner cavity; and A heating film, which at least partially covers the inner wall surface of the inner cavity, is used to heat the heat conductor.

2. The heating element as described in claim 1, characterized in that, The tail end has a tail end opening that communicates with the inner cavity.

3. The heating element as described in claim 2, characterized in that, The heat conductor includes a body and a base, the base being located at the tail end, the radial dimension of the outer circumferential surface of the base being greater than the radial dimension of the outer circumferential surface of the body, and the tail end opening being located on the base.

4. The heating element as described in claim 3, characterized in that, A portion of the heating film covers the side of the base facing away from the main body.

5. The heating element according to any one of claims 1-4, characterized in that, The heat conductor is integrally formed; and / or the head end and the tail end are detachably connected.

6. The heating element according to any one of claims 1-4, characterized in that, The heating film is a deposited sputtered film.

7. A heating component used in an aerosol generating device, characterized in that, The heating assembly includes a heating element as described in any one of claims 1-6; the heating assembly has a heating cavity for inserting an aerosol generation matrix, the heating element being inserted into the heating cavity.

8. An aerosol generating device, characterized in that, It includes a housing and a heating assembly as described in claim 7, wherein the heating assembly is disposed within the housing.

9. An aerosol generating device, characterized in that, The device includes a housing and a heating assembly, the heating assembly including a heating element as described in claim 3 or 4; the heating assembly has a heating cavity for inserting an aerosol generation matrix, the heating element being inserted into the heating cavity; the heating assembly further includes a first fixing member and a second fixing member, the base being clamped between the first fixing member and the second fixing member.

10. The aerosol generating apparatus as described in claim 9, characterized in that, The first fixing member forms at least a part of the heating cavity, and an opening is provided at the part of the first fixing member that contacts the heating element, and the opening communicates with the heating cavity.

Images