Heating element and heating assembly for a heat-not-burn device
By employing heating sections with different inner diameters within a heat-conducting substrate and an indirect heating method using hot airflow in the heated non-combustible device, the problem of complex zoned heating control was solved, and heating uniformity and efficiency were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG QISITECH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-07-10
AI Technical Summary
In existing heated non-combustible devices, the heating element control of the zoned heating structure is complex, which requires separate control of different heating elements during use, increasing the difficulty of product operation.
The design of a heating element for a non-combustible heating device involves setting a first heating section and a second heating section with different inner diameters within a heat-conducting substrate. The heating area of the heating element covers part of the first heating section, and a hot airflow is formed by utilizing the ventilation gap to indirectly heat the aerosol to generate the product, thereby achieving a zoned heating function.
It reduces the difficulty of controlling the heating element, improves heating uniformity and efficiency, and simplifies the operation process.
Smart Images
Figure CN224474048U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heating non-combustible devices, specifically to a heating element and heating component of a heating non-combustible device. Background Technology
[0002] The heated non-combustible device is equipped with a heating element to heat and bake the aerosol-generating product to produce aerosols. In the initial stage of heating, the heating element needs to rapidly heat the aerosol-generating product to produce aerosols, and then uniform heating is required to stabilize the aerosol production.
[0003] Therefore, some heating elements are designed with a zoned heating structure, meaning the heating element includes two or more heating components. By combining these components, the heating requirements of different heating stages can be met. However, the design of multiple heating components also means that each component needs to be controlled separately during use, resulting in a more complex product control system. Utility Model Content
[0004] In order to improve the problem of the complex control of the heating element in zoned heating, this application provides a heating element and heating component for a non-combustible heating device.
[0005] According to a first aspect, one embodiment provides a heating element for a non-combustible heating device, comprising:
[0006] A thermally conductive substrate has a heating cavity inside and has a first side and a second side facing opposite directions. The first side has a first opening for inserting the aerosol-generated product into the heating cavity. The thermally conductive substrate also has a second opening communicating with the outside.
[0007] And heating elements, disposed on the thermally conductive substrate;
[0008] The heating chamber includes a first heating section and a second heating section arranged along its own extending direction; the cavity wall of the first heating section is configured to contact and transfer heat with the outer peripheral wall of the aerosol generating article inserted into the heating chamber; the inner diameter of the second heating section is larger than the inner diameter of the first heating section, so as to form a ventilation gap between the cavity wall of the second heating section and the outer peripheral wall of the aerosol generating article inserted into the heating chamber, and the ventilation gap communicates with the outside air through the second opening;
[0009] The heating area of the heating element covers at least a portion of the first heating section.
[0010] In one embodiment, the first opening is provided at the end of the first heating section away from the second heating section.
[0011] In one embodiment, the ventilation gap is arranged in an annular shape.
[0012] In one embodiment, the first heating section and the second heating section are transitioned by a stepped structure, with the stepped surface of the stepped structure facing the second heating section, serving as the boundary between the inner diameters of the first heating section and the second heating section.
[0013] In one embodiment, the heating area of the heating element further covers at least a portion of the second heating segment.
[0014] In one embodiment, the thermally conductive substrate is made of one of metal, ceramic, or transparent conductive glass;
[0015] The heating element is disposed on the outer wall of the heat-conducting substrate and is one of the following: thick film heating circuit, thin film heating circuit, bonded metal heating mesh or transparent conductive oxide coating;
[0016] When the material of the heat-conducting substrate is transparent conductive glass, the heating element is a transparent conductive oxide coating.
[0017] According to a second aspect, one embodiment provides a heating component for a non-combustible heating device, comprising:
[0018] As described in any of the above embodiments, the heating element has a second opening at the end of the second heating section away from the first heating section;
[0019] And a plug, disposed at the end of the heating element where the second opening is located, for limiting the insertion position of the aerosol generating article along the extension direction of the heating cavity;
[0020] An air intake channel is provided on the plug and / or between the plug and the heating element to connect external air with the ventilation gap.
[0021] In one embodiment, the plug includes:
[0022] The plate portion is disposed at the second opening of the heating element;
[0023] And a convex ring portion, disposed in the plate body portion, and extending into the second heating section;
[0024] A first flow guiding gap is formed between the outer wall of the convex ring portion and the cavity wall of the second heating section. The inner diameter of the convex ring portion is larger than the inner diameter of the first heating section, so as to form a second flow guiding gap between the inner wall of the convex ring portion and the inserted aerosol generating article.
[0025] The first flow guide gap is connected to the air intake channel, and the second flow guide gap is connected to the first flow guide gap at one end near the first heating section.
[0026] In one embodiment, the plug further includes a limiting protrusion located on the side of the plate portion facing the second heating section, which restricts the end face of the aerosol generating article inserted into the heating cavity from contacting the plate portion, thereby forming a third flow guiding gap between the plate portion and the end face of the aerosol generating article. The third flow guiding gap communicates with the second flow guiding gap, and the heating airflow enters the interior from the end face of the aerosol generating article for heating.
[0027] In one embodiment, the air intake channel includes a groove disposed on the outer peripheral wall of the plate body and / or on the cavity wall of the heating cavity located at the second opening;
[0028] And / or, the outer diameter of the plate portion is smaller than the inner diameter of the second opening, and the air intake channel includes an air intake gap formed between the plate portion and the cavity wall of the second heating section located at the second opening.
[0029] In one embodiment, the plug has a plug cavity, and the opening of the plug cavity is connected to the second opening and communicates with the second heating section;
[0030] The air intake channel includes a guide air hole that penetrates the plug and is connected to the inner cavity of the plug, so as to allow external air to enter the inner cavity of the plug, be preheated, and then flow into the aerosol-generated product.
[0031] In one embodiment, the inner diameter of the plug cavity is not less than the inner diameter of the first heating section, so as to allow the aerosol-generating product to be inserted.
[0032] In one embodiment, the plug is provided with a support structure for supporting the end face of the aerosol generating article, so that a buffer space is formed between the end face of the aerosol generating article and the cavity wall of the plug.
[0033] According to the heating element of the heated non-combustible device in the above embodiment, by setting a first heating section and a second heating section with different inner diameters in the heating chamber, and ensuring that the heating area of the heating element at least covers part of the cavity wall of the first heating section, the first heating section can contact the inserted aerosol generating product for heat transfer, which helps to achieve rapid preheating of the aerosol generating product. The second heating section can generate a hot airflow by heating the air in the ventilation gap. The hot airflow is drawn into the interior of the aerosol generating product, which can bake the aerosol matrix therein, helping to improve heating uniformity. By improving the structure of the heat-conducting substrate, a single heating element can achieve the function of zoned heating, which helps to meet the heating requirements while reducing the control difficulty of the heating element. Attached Figure Description
[0034] Figure 1This is a schematic cross-sectional view of the heating element of a non-combustible heating device according to one embodiment.
[0035] Figure 2 This is a cross-sectional structural schematic diagram of the heating component of a heating non-combustible device according to one embodiment;
[0036] Figure 3 This is a cross-sectional structural schematic diagram of the heating component of a non-combustible heating device according to another embodiment;
[0037] Figure 4 This is a cross-sectional structural schematic diagram of the heating component of a heating non-combustible device according to another embodiment.
[0038] In the figure, 100 is the heating element; 110 is the heat-conducting substrate; 111 is the first side; 112 is the second side; 120 is the heating cavity; 121 is the first heating section; 122 is the second heating section; 1221 is the ventilation gap; 130 is the first opening; 140 is the second opening; and 150 is the stepped surface.
[0039] 200, plug; 210, plate body; 220, protruding ring; 221, first guide gap; 222, second guide gap; 223, third guide gap; 230, plug inner cavity; 240, support structure;
[0040] 300, intake channel; 310, groove; 320, intake gap; 330, air guide hole;
[0041] 400. Aerosol-generating products; 410. Plugs. Detailed Implementation
[0042] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related 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.
[0043] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.
[0044] 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).
[0045] In this embodiment, by providing a first heating section 121 and a second heating section 122 within the heating cavity 120 of the heat-conducting substrate 110, and since the inner diameter of the second heating section 122 is larger than that of the first heating section 121, the first heating section 121 can transfer heat through contact with the outer peripheral wall of the aerosol generating product 400 inserted into the heating cavity 120. The second heating section 122 can indirectly heat the aerosol generating product 400 by heating the air between itself and the outer peripheral wall of the aerosol generating product 400 inserted into the heating cavity 120, thus forming a hot airflow. This allows the heating element 100 to have only one heating component, enabling zoned heating by utilizing the different heating methods of the first heating section 121 and the second heating section 122, which helps reduce the control difficulty of the heating element 100.
[0046] Embodiment of the heating element 100 of the heating non-combustible device in this application:
[0047] In one embodiment, please refer to Figures 1-4 The heating element 100 of the heating non-combustible device includes a heat-conducting substrate 110 and a heating element (not shown in the figure) disposed on the heat-conducting substrate 110. The heating element is used to generate heat, and the heat-conducting substrate 110 is used to transfer the heat generated by the heating element to the aerosol generating article 400.
[0048] Please refer to Figure 1 The heat-conducting substrate 110 has a heating cavity 120 inside, and has a first side 111 and a second side 112 facing opposite directions. The first side 111 has a first opening 130 for inserting the aerosol generating product 400 into the heating cavity 120. The heat-conducting substrate 110 also has a second opening 140 communicating with the outside to allow outside air to enter the heating cavity 120. The second opening 140 can be located on the second side 112 or on the first side 111.
[0049] For easier understanding, please refer to Figure 1The side of the heat-conducting substrate 110 with the first opening 130 can be designated as the first side 111 of the heat-conducting substrate 110, and the side of the heat-conducting substrate 110 opposite to the first side 111 can be designated as the second side 112.
[0050] The heating chamber 120 includes a first heating section 121 and a second heating section 122 arranged along its own extension direction. The cavity wall of the first heating section 121 is configured to contact and transfer heat with the outer peripheral wall of the aerosol generating product 400 inserted into the heating chamber 120. That is, the shape and inner diameter of the cavity wall of the first heating section 121 are adapted to the outer peripheral wall of the aerosol generating product 400 inserted into the heating chamber 120, so that the outer peripheral wall of the aerosol generating product 400 can fit with the cavity wall of the first heating section 121 after it is inserted into the heating chamber 120.
[0051] Please refer to Figure 1 and Figure 2 The inner diameter of the second heating section 122 is larger than that of the first heating section 121. When the aerosol generating product 400 is inserted into the heating chamber 120, a ventilation gap 1221 is formed between the cavity wall of the second heating section 122 and the outer peripheral wall of the aerosol generating product 400. The ventilation gap 1221 communicates with the outside air through the second opening 140, allowing the second heating section 122 to generate a hot airflow by heating the air in the ventilation gap 1221, thereby heating the aerosol generating product 400 with the hot airflow. Since the hot airflow can be drawn into the interior of the aerosol generating product 400 during suction, it helps to bake the aerosol matrix in the central region of the aerosol generating product 400, improves the heating efficiency in the central region, and enhances the heating uniformity.
[0052] In one embodiment, the heat-conducting substrate 110 may be tubular, with its inner cavity serving as the heating chamber 120. The heating chamber 120 may include a first heating section 121 and a second heating section 122 sequentially arranged along the axial direction of the heat-conducting substrate 110. The inner diameter of the first heating section 121 may be equal to or slightly smaller than the outer diameter of the aerosol generating article 400, so that the outer peripheral wall of the aerosol generating article 400 can adhere to the cavity wall of the first heating section 121 for heat transfer after insertion into the heating chamber 120. The second heating section 122 may be coaxially arranged with the first heating section 121, forming an annular ventilation gap 1221 between the aerosol generating article 400 inserted into the heating chamber 120 and the cavity wall of the second heating section 122.
[0053] It is understood that the heat-conducting substrate 110 can be configured with only the inner cavity diameter variation, that is, the first heating section 121 and the second heating section 122 are formed by the change in the thickness of the cavity wall of the heating cavity 120; or it can be configured with an integral diameter variation with the same cavity wall thickness.
[0054] Alternatively, the second heating section 122 can be eccentrically positioned relative to the first heating section 121, forming a crescent-shaped or similar ventilation gap 1221 between the aerosol generating product 400 inserted into the heating cavity 120 and the cavity wall of the second heating section 122. This allows a portion of the outer peripheral wall of the aerosol generating product 400 inserted into the heating cavity 120 to be in contact with the cavity wall of the second heating section 122, while the remaining portion of the outer peripheral wall is spaced apart from the cavity wall of the second heating section 122. In short, any arrangement that allows the heating methods of the first heating section 121 and the second heating section 122 to differ, thus creating different heating zones, is acceptable.
[0055] In one embodiment, please refer to Figure 1 The end of the first heating section 121 away from the second heating section 122 may be provided with a first opening 130 so that the first opening 130 and the first heating section 121 are adjacent to each other, which helps to quickly discharge the aerosol generated in the aerosol generating product 400 during preheating, thereby improving the preheating efficiency.
[0056] In another embodiment, the first opening 130 may be located at the end of the second heating section 122 away from the first opening 130, so that the second heating section 122 and the first opening 130 are adjacent to each other.
[0057] In one embodiment, the first heating section 121 and the second heating section 122 can be transitioned by a stepped structure, with the stepped surface 150 facing the second heating section 122, serving as the boundary between the inner diameters of the first heating section 121 and the second heating section 122. In other embodiments, the first heating section 121 and the second heating section 122 can also be transitioned by other transition structures such as inclined surfaces or conical surfaces.
[0058] In one embodiment, the heating area of the heating element can at least cover a portion of the first heating section 121 to achieve rapid heating of the first heating section 121, thereby achieving rapid preheating of the aerosol-generated product 400. The heating area of the heating element can be defined as the area in direct contact between the thermally conductive substrate 110 and the heating element. Taking the heating element being disposed on the outer wall of the thermally conductive substrate 110 as an example, the heating area of the heating element is the projection area of the heating element on the radial plane of the thermally conductive substrate 110.
[0059] In a further embodiment, the heating area of the heating element may also cover at least a portion of the second heating section 122 to improve heating efficiency.
[0060] For example, the heating element may be disposed only on the portion of the thermally conductive substrate 110 corresponding to the first heating section 121, so that its heating area covers most or all of the cavity wall of the first heating section 121. The heating element may also be partially disposed on the portion of the thermally conductive substrate 110 corresponding to the second heating section 122, so that its heating area further covers part of the cavity wall of the second heating section 122.
[0061] In one embodiment, the thermally conductive substrate 110 may be made of one of the following materials: metal, ceramic, or transparent conductive glass; wherein, the metal material may include stainless steel, aluminum, copper, etc.
[0062] Heating components can be disposed on the outer wall of the heat-conducting substrate 110, and can be one of thick film heating circuit, thin film heating circuit, bonded metal heating mesh or transparent conductive oxide coating, and can be disposed on the heat-conducting substrate 110 by means of printing, sintering or bonding processes.
[0063] The material of the bonded metal heating mesh can be pure titanium or titanium alloy, iron-chromium-aluminum alloy, nickel-chromium alloy, iron-nickel alloy, or SUS316 stainless steel, etc. Furthermore, when the heat-conducting substrate 110 is made of transparent conductive glass, the heating element can be a transparent conductive oxide coating; the transparent conductive oxide coating can be selected as indium tin oxide (ITO) coating or other transparent conductive oxide coatings as needed.
[0064] In other embodiments, the heating element may also be other types of heating element, and the heating element may also be disposed inside the cavity wall of the heating cavity 120 or on the surface of the cavity wall of the heating cavity 120.
[0065] Embodiments of the heating element of the heating non-combustible device in this application:
[0066] In one embodiment, please refer to Figures 2-4 The heating element of the heated non-combustible device includes a heating element 100 as described in any of the above embodiments and a plug 200. In the heating element 100, a second opening 140 is provided at the end of the second heating section 122 away from the first heating section 121. The plug 200 is disposed at the end of the heating element 100 where the second opening 140 is located, and an air inlet channel 300 is provided on the plug 200 and / or between the plug 200 and the heating element 100 to connect external air with the ventilation gap 1221. The plug 200 is used to restrict the insertion position of the aerosol generating article 400 along the extension direction of the heating chamber 120 for user use.
[0067] In one embodiment, please refer to Figure 2The plug 200 includes a plate portion 210 and a convex ring portion 220. The plate portion 210 is disposed at the second opening 140 of the heating element 100, and the convex ring portion 220 is disposed on the plate portion 210 and extends into the second heating section 122. A first flow guiding gap 221 is formed between the outer wall of the convex ring portion 220 and the cavity wall of the second heating section 122. The inner diameter of the convex ring portion 220 is larger than the inner diameter of the first heating section 121, so that a second flow guiding gap 222 is formed between the inner wall of the convex ring portion 220 and the inserted aerosol generating article 400. The first flow guiding gap 221 communicates with the air inlet channel 300. The end of the convex ring portion 220 near the first heating section 121 can be spaced apart from the first heating section 121 so that the second flow guiding gap 222 and the first flow guiding gap 221 communicate at the end near the first heating section 121. By setting the convex ring portion 220 to form the first guide gap 221 and the second guide gap 222, it is helpful to form a meandering flow path for the airflow, which facilitates the absorption of heat by the airflow during the flow process, thereby improving the heating efficiency of the airflow.
[0068] In a further embodiment, the plug 200 also includes a limiting protrusion (not shown). The limiting protrusion is located on the side of the plate portion 210 facing the second heating section 122, and can be located on the plate portion 210 or on the inner wall of the annular portion 220. The limiting protrusion is used to restrict the end face of the aerosol generating article 400 inserted into the heating chamber 120 from contacting the plate portion 210, so as to form a third guiding gap 223 between the plate portion 210 and the end face of the aerosol generating article 400. The third guiding gap 223 communicates with the second guiding gap 222, thereby forming an airflow path from the air inlet channel 300 through each guiding gap into the aerosol generating article 400 during suction, and the heating airflow enters the interior from the end face of the aerosol generating article 400 for heating.
[0069] It is understood that in some embodiments, the limiting protrusion can be omitted, and the user can insert the aerosol generating product 400 into contact with the plate body 210 and then pull it outward a certain distance (such as 3mm-5mm) to form a third flow guide gap 223.
[0070] In some embodiments, please refer to Figure 2 The air intake channel 300 may include a groove 310 disposed on the outer peripheral wall of the plate portion 210, and / or a groove 310 disposed on the cavity wall of the heating chamber 120 located at the second opening 140. In other embodiments, the outer diameter of the plate portion 210 may be smaller than the inner diameter of the second opening 140, such that the air intake channel 300 may include an air intake gap 320 formed between the plate portion 210 and the cavity wall of the second heating section 122 located at the second opening 140. It is understood that in different embodiments, the air intake channel 300 may adopt any of the above-described configurations, or a combination of multiple configurations.
[0071] For example, please refer to Figure 2 The outer diameter of the plate portion 210 can be smaller than the inner diameter of the second opening 140, so that an air intake gap 320 is formed between the plate portion 210 and the cavity wall of the second heating section 122 located at the second opening 140. The cavity wall of the heating cavity 120 located at the second opening 140 is provided with a groove 310. The air intake channel 300 includes the air intake gap 320 and the groove 310.
[0072] The aforementioned plug 200 can be made of metal materials such as stainless steel, aluminum alloy, surface hardened alumina alloy, magnesium alloy, and magnesium-aluminum alloy; ceramic materials such as alumina, zirconium oxide, zirconium oxide reinforced alumina (ZTA), yttrium oxide reinforced zirconium oxide (YSZ), and graphite ceramics; glass materials such as quartz glass, high aluminosilicate glass, and high borosilicate glass; or other types of materials.
[0073] The plug 200 can be separately installed from the heat-conducting substrate 110 or integrally installed with the heat-conducting substrate 110. The separately installed plug 200 can be fixed to the heat-conducting substrate 110 in any detachable or non-detachable manner. For example, it can be fixed in the second heating section 122 by providing a snap-fit protrusion on the outer wall of the protruding ring portion 220.
[0074] In another embodiment, please refer to Figure 3 The plug 200 has a plug cavity 230, the opening of the plug cavity 230 is connected to the second opening 140 and communicates with the second heating section 122; the air inlet channel 300 includes a guide air hole 330 that passes through the plug 200 and communicates with the plug cavity 230, for allowing external air to enter the plug cavity 230 for preheating and then flow into the aerosol to generate the product 400.
[0075] Please refer to the following: Figure 2 The inner diameter of the plug cavity 230 can be no less than the inner diameter of the first heating section 121, so that the aerosol generating product 400 can be inserted.
[0076] In one embodiment, please refer to Figure 4 The plug 200 is provided with a support structure 240, which is used to support the end face of the aerosol generating product 400 so that a buffer space is formed between the end face of the aerosol generating product 400 and the cavity wall of the plug inner cavity 230.
[0077] For example, the support structure 240 includes a support rod that is placed horizontally at the opening of the plug cavity 230 to support the end face of the aerosol generating article 400, so that the aerosol generating article 400 is confined outside the plug cavity 230, thereby allowing the plug cavity 230 to serve as a buffer space for air to absorb heat and mix.
[0078] The aforementioned plug 200 can be integrally molded with the heat-conducting substrate 110 using in-mold injection molding, or it can be connected to the heating element 100 by high-temperature welding, high-temperature adhesive bonding, or laser welding. Alternatively, it can be mechanically assembled using an O-ring. The plug 200 can be made of high-temperature resistant plastics such as polyetheretherketone (PEEK) or polyphenylene sulfone (PPSU), or other types of high-temperature resistant materials.
[0079] It is understandable that if the plug 200 is made of high-temperature resistant plastic, the reliability of the connection between the plug 200 and the heat-conducting substrate 110 is limited by the temperature of the heat-conducting substrate 110. Therefore, the heating area of the heating element in the heating element 100 can only cover part of the cavity wall of the second heating section 122, such as one-third of the area near the first heating section 121, to avoid the temperature of the contact area between the heat-conducting substrate 110 and the plug 200 being too high.
[0080] Those skilled in the art will understand; please refer to Figures 2 to 4 The heating element 100 and heating components in the above embodiments can be adapted to aerosol generating products 400 with plugs 410 and aerosol generating products 400 without plugs 410, especially aerosol generating products 400 whose outer peripheral surface is made of a breathable material that allows air to enter.
[0081] The "plug 410" can be understood as an end structure located at the insertion end of the aerosol generating article 400, used to fix the aerosol matrix in the aerosol generating article 400 and prevent the aerosol matrix from scattering. The plug 410 can have functions such as filtering and guiding. The material of the plug 410 can be a high-temperature resistant food-grade material such as cellulose paper or PLA polylactic acid, or a heat-resistant plastic material, to prevent the release of harmful substances during heating. The plug 410 does not generate aerosols, so the heating and baking temperature at the plug 410 can be controlled within a lower temperature range not exceeding 250°C, for example, not exceeding 200°C.
[0082] Furthermore, those skilled in the art should also understand that the plug 200 described in the above embodiments is not an exhaustive list of plug 200 structures. The plug 200 can also be configured in other shapes, as long as they can meet the flow guidance requirements in design and use.
[0083] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.
Claims
1. A heating element for a non-combustible heating device, characterized in that, include: A thermally conductive substrate has a heating cavity inside and has a first side and a second side facing opposite directions. The first side has a first opening for inserting the aerosol-generated product into the heating cavity. The thermally conductive substrate also has a second opening communicating with the outside. And heating elements, disposed on the thermally conductive substrate; The heating chamber includes a first heating section and a second heating section arranged along its own extending direction; the cavity wall of the first heating section is configured to contact and transfer heat with the outer peripheral wall of the aerosol generating article inserted into the heating chamber; the inner diameter of the second heating section is larger than the inner diameter of the first heating section, so as to form a ventilation gap between the cavity wall of the second heating section and the outer peripheral wall of the aerosol generating article inserted into the heating chamber, and the ventilation gap communicates with the outside air through the second opening; The heating area of the heating element covers at least a portion of the first heating section.
2. The heating element as described in claim 1, characterized in that, The first opening is provided at the end of the first heating section away from the second heating section.
3. The heating element as described in claim 1, characterized in that, The ventilation gap is arranged in a ring shape.
4. The heating element as described in claim 3, characterized in that, The first heating section and the second heating section are connected by a stepped structure, with the stepped surface facing the second heating section to serve as the boundary between the inner diameters of the first heating section and the second heating section.
5. The heating element as described in any one of claims 1 to 4, characterized in that, The heating area of the heating element also covers at least a portion of the second heating section.
6. The heating element as described in any one of claims 1 to 4, characterized in that, The thermally conductive substrate is made of one of the following materials: metal, ceramic, or transparent conductive glass. The heating element is disposed on the outer wall of the heat-conducting substrate and is one of the following: thick film heating circuit, thin film heating circuit, bonded metal heating mesh or transparent conductive oxide coating; When the material of the heat-conducting substrate is transparent conductive glass, the heating element is a transparent conductive oxide coating.
7. The heating element of a non-combustible heating device, characterized in that, include: The heating element as described in any one of claims 1 to 6, wherein the second heating section has a second opening at the end away from the first heating section; And a plug, disposed at the end of the heating element where the second opening is located, for limiting the insertion position of the aerosol generating article along the extension direction of the heating cavity; An air intake channel is provided on the plug and / or between the plug and the heating element to connect external air with the ventilation gap.
8. The heating component as described in claim 7, characterized in that, The plug includes: The plate portion is disposed at the second opening of the heating element; And a convex ring portion, disposed in the plate body portion, and extending into the second heating section; A first flow guiding gap is formed between the outer wall of the convex ring portion and the cavity wall of the second heating section. The inner diameter of the convex ring portion is larger than the inner diameter of the first heating section, so as to form a second flow guiding gap between the inner wall of the convex ring portion and the inserted aerosol generating article. The first flow guide gap is connected to the air intake channel, and the second flow guide gap is connected to the first flow guide gap at one end near the first heating section.
9. The heating component as described in claim 8, characterized in that, The plug also includes a limiting protrusion located on the side of the plate portion facing the second heating section. The limiting protrusion is used to restrict the end face of the aerosol generating product inserted into the heating cavity from contacting the plate portion, so as to form a third flow guiding gap between the plate portion and the end face of the aerosol generating product. The third flow guiding gap is connected to the second flow guiding gap, and the heating airflow enters the interior from the end face of the aerosol generating product for heating.
10. The heating component as described in claim 8, characterized in that, The air intake channel includes a groove disposed on the outer peripheral wall of the plate body and / or on the cavity wall of the heating chamber located at the second opening; And / or, the outer diameter of the plate portion is smaller than the inner diameter of the second opening, and the air intake channel includes an air intake gap formed between the plate portion and the cavity wall of the second heating section located at the second opening.
11. The heating component as described in claim 7, characterized in that, The plug has an inner cavity, and the opening of the inner cavity is connected to the second opening and communicates with the second heating section. The air intake channel includes a guide air hole that penetrates the plug and is connected to the inner cavity of the plug, so as to allow external air to enter the inner cavity of the plug, be preheated, and then flow into the aerosol-generated product.
12. The heating component as claimed in claim 11, characterized in that, The inner diameter of the plug cavity is not less than the inner diameter of the first heating section, so that the aerosol generating product can be inserted.
13. The heating component as described in claim 12, characterized in that, The plug is provided with a support structure, which is used to support the end face of the aerosol generating product so that a buffer space is formed between the end face of the aerosol generating product and the cavity wall of the plug.