Heating assembly and aerosol generating device

Abstract

The utility model provides a heating assembly and an aerosol generating device. The heating assembly comprises a heating substrate; the heating layer is arranged on the heating base body; the heating base body is wound to form a hollow barrel, the aerosol generating product is suitable for being inserted into the barrel-shaped structure, and the heating layer is arranged on the surface, facing inwards in the radial direction, of the heating base body. The heating layer of the heating assembly is arranged on the radial inward surface of the heating base body, so that heat of the heating assembly is transmitted to the aerosol generating product from the heating layer without penetrating through the heating base body, and on one hand, the heat transmission efficiency of the heating assembly is improved; on the other hand, the heat transferred to the shell of the aerosol generating device by the heating assembly is less, the temperature of the shell is low, and the user experience is good.

Description

Technical Field

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

[0002] The heated but non-combustible aerosol generating device includes a heating element that can be inserted into the interior of the aerosol generating article to heat the aerosol generating article. The heating element can have a heating layer on the heating substrate to heat the aerosol generating article.

[0003] The heating component of a heated but non-combustible aerosol generating device may include a heating substrate and a heating layer. The heating layer is disposed in the heating substrate. However, when the heating layer is disposed in the interlayer of the heating substrate or when the heating substrate is away from the aerosol generating product, the heat generated by the heating layer needs to pass through the heating substrate to be conducted to the aerosol generating product, resulting in low heat utilization of the heating component and high power consumption of the aerosol generating device.

[0004] Application content

[0005] To address the issue of low heat utilization rate of heating components.

[0006] This application provides a heating component, including:

[0007] Heating substrate;

[0008] A heating layer is disposed on the heating substrate;

[0009] The heating substrate is wound to form a hollow cylindrical shape, and the aerosol-generated product is suitable for insertion into the cylindrical structure. The heating layer is disposed on the radially inward surface of the heating substrate.

[0010] This application provides a heating component, wherein the heating substrate comprises an alumina cast sheet.

[0011] This application provides a heating component, wherein the heating substrate includes at least one wound layer formed by winding.

[0012] This application provides a heating component, wherein the thickness of the winding layer is 0.12mm-0.16mm; and / or the thickness of the winding layer is 0.14mm-0.15mm.

[0013] This application provides a heating component, wherein the heating substrate includes an adjacent and stacked first winding layer and a second winding layer, the first winding layer having a first seam, the second winding layer having a second seam, the first seam and the second seam being offset in the circumferential direction of the heating component, the first winding layer being located radially inside the second winding layer, and the heating layer being disposed on the radially inner surface of the first winding layer.

[0014] This application provides a heating component, wherein the heating layer is wound with 0.8-3 turns.

[0015] This application provides a heating component, wherein the heating layer includes an electrode unit and a heating unit, the heating unit being electrically connected to the electrode unit, and the electrode unit having a solder pad for receiving current.

[0016] This application provides a heating component, wherein the heating substrate has a receiving hole corresponding to the solder pad.

[0017] This application provides a heating component, wherein the receiving hole is a circular through hole with a diameter of 0.1mm-0.6mm; and / or the diameter of the receiving hole is 0.15mm-0.3mm.

[0018] This application provides a heating component, wherein an electrode paste is disposed in the receiving hole, and the sheet resistance of the electrode paste is 0.03Ω / □-0.08Ω / □; and / or the sheet resistance of the electrode paste is 0.04Ω / □-0.06Ω / □.

[0019] This application provides a heating component, wherein a groove is provided on the side of the heating substrate away from the heating layer, and the receiving hole is exposed in the groove.

[0020] This application provides a heating component, wherein the heating unit includes multiple heating tracks, each heating track extending along the axial direction of the winding direction of the heating substrate, and the multiple heating tracks are distributed at intervals along the winding direction of the heating substrate.

[0021] This application provides a heating component, wherein the ratio of the sheet resistance of the heating unit to the sheet resistance of the electrode unit is greater than or equal to 8.

[0022] This application provides a heating component, wherein the thickness of the heating substrate is 0.1mm-0.6mm; and / or the thickness of the heating substrate is 0.15mm-0.35mm; and / or the thickness of the heating layer is 5μm-30μm; and / or the thickness of the heating layer is 10μm-20μm.

[0023] This application provides a heating component, wherein the thickness of the heating unit is 5μm-30μm; and / or the thickness of the heating unit is 10μm-20μm; and / or the thickness of the electrode unit is 5μm-30μm; and / or the thickness of the electrode unit is 10μm-20μm; and / or the dimension of the heating unit along the axial direction of the winding direction is greater than or equal to 0.50mm.

[0024] This application provides a heating component, wherein an insulating layer is provided on the side of the heating layer away from the heating substrate.

[0025] This application provides an aerosol generating device, including a battery assembly and the aforementioned heating assembly, wherein the battery assembly is used to provide electrical energy to the heating assembly.

[0026] The heating element provided in this application has a heating layer disposed on the radially inward surface of the heating substrate, so that the heat of the heating element is transferred to the aerosol generating product through the heating layer without having to pass through the heating substrate. This improves the heat transfer efficiency of the heating element and reduces the amount of heat transferred from the heating element to the shell of the aerosol generating device, resulting in a lower shell temperature and a better user experience. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0028] Figure 1 This is a schematic diagram of a heating component according to an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of a heating component according to an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of a heating component according to an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of an aerosol generating apparatus according to an embodiment of this application.

[0032] In the picture:

[0033] 10. Heating components;

[0034] 1. Heating substrate; 11. Receiving hole; 12. Settling tank;

[0035] 2. Heating layer; 21. Electrode unit; 211. Pad; 22. Heating unit; 221. Heating trajectory;

[0036] 20. Battery components;

[0037] 100. Aerosol generating device. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying the quantity or order of the indicated technical features relative to their importance. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be intervening elements. When an element is referred to as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0042] It should be noted that the embodiments of this application provide a heating component and an aerosol generating device including the heating component. The aerosol generating device can be used in conjunction with an aerosol generating product to generate aerosols.

[0043] Aerosol generating articles may include a mouthpiece, a connecting section, and a tobacco segment capable of generating aerosols. The connecting section, located between the mouthpiece and the tobacco segment, guides the aerosol to the mouthpiece. The mouthpiece is for a user to hold in their mouth, allowing the user to inhale the aerosol by sucking on the mouthpiece. The tobacco segment in the aerosol generating article may contain an aerosol generating matrix.

[0044] As used herein, the term "aerosol-generating matrix" refers to a matrix capable of releasing volatile substances to form inhalable aerosols. The aerosol-generating matrix may include tobacco-containing materials containing volatile tobacco flavor compounds that are released from the substrate upon heating. Specifically, the aerosol-generating matrix may be a tobacco-containing aerosol-generating matrix or an aerosol-generating matrix containing solid tobacco. Alternatively, the aerosol-generating matrix may include non-tobacco materials. The aerosol-generating matrix may also include aerosol-forming agents. Examples of suitable aerosol-forming agents are glycerol and propylene glycol.

[0045] If desired, the aerosol generating matrix may contain additional tobacco or non-tobacco volatile flavor compounds released when the aerosol generating matrix is ​​heated. The aerosol generating matrix may also contain microcapsules, such as those containing additional tobacco or non-tobacco volatile flavor compounds, and these microcapsules may melt during heating of the solid aerosol generating matrix.

[0046] The aerosol-generating article can be generally a rod-shaped structure extending longitudinally. The mouthpiece can be positioned adjacent to the proximal end of the aerosol-generating article. The tobacco segment can be positioned adjacent to the distal end of the aerosol-generating article.

[0047] The heating element releases heat to the aerosol-generating product, causing the aerosol-generating matrix to produce volatile substances. These volatile substances combine with air flowing into the aerosol-generating matrix to form an aerosol. The air flowing into the aerosol-generating matrix and the aerosol generated by the matrix can exit from the proximal end of the matrix and be inhaled into the user's mouth.

[0048] This application provides a heating component 10, including a heating substrate 1 and a heating layer 2. The heating layer 2 is disposed on the heating substrate 1. The heating substrate 1 is wound to form a hollow cylindrical shape, and an aerosol-generated article is suitable for insertion into the cylindrical structure. The heating layer 2 is disposed on the radially inward surface of the heating substrate 1.

[0049] The heating layer 2 of the heating component 10 provided in this application is disposed on the radially inward surface of the heating substrate 1, so that the heat of the heating component 10 is transferred to the aerosol generating product through the heating layer 2 without having to pass through the heating substrate 1. On the one hand, this improves the heat transfer efficiency of the heating component 10, and on the other hand, it reduces the amount of heat transferred from the heating component 10 to the shell of the aerosol generating device, resulting in a lower shell temperature and a better user experience.

[0050] In one embodiment of this application, the heating substrate 1 includes an alumina cast sheet. The alumina cast sheet has a high thermal conductivity, which allows the heat generated by the heating layer 2 to be distributed more evenly on the heating substrate 1, resulting in a more uniform temperature field distribution of the heating component 10.

[0051] In one embodiment of this application, the heating layer 2 includes an electrode unit 21 and a heating unit 22. The heating unit 22 is electrically connected to the electrode unit 21. The electrode unit 21 is provided with a pad 211 for receiving current.

[0052] In one embodiment of this application, the electrode unit 21 is formed by printing and sintering electrode paste. In one embodiment of this application, the heating substrate 1 has a receiving hole 11 corresponding to the pad 211. In one embodiment of this application, electrode paste is disposed in the receiving hole 11, resulting in lower resistance at the pad 211 and lower contact resistance when the pad 211 is soldered to the electrode lead. In one embodiment of this application, the electrode paste in the receiving hole 11 is caused by the electrode paste seeping into the receiving hole 11 during the printing of the electrode unit on the heating substrate 1.

[0053] In one embodiment of this application, the receiving hole 11 is a circular through hole with a diameter of 0.1mm-0.6mm. In one embodiment of this application, the diameter of the receiving hole 11 is 0.15mm-0.3mm. In another embodiment of this application, the receiving hole 11 is a circular through hole with a diameter of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, or 0.6mm.

[0054] In one embodiment of this application, the sheet resistance of the electrode paste is 0.03Ω / □-0.08Ω / □. In one embodiment of this application, the sheet resistance of the electrode paste is 0.04Ω / □-0.06Ω / □. In one embodiment of this application, the sheet resistance of the electrode paste is 0.03Ω / □, 0.04Ω / □, 0.05Ω / □, 0.06Ω / □, 0.07Ω / □, or 0.08Ω / □.

[0055] It should be noted that sheet resistance is the resistance between edges of a square thin-film conductive material. A key characteristic of sheet resistance is that the resistance between edges of any square of any size is the same; whether the side length is 1 meter or 0.1 meters, the sheet resistance is identical. Therefore, sheet resistance is only related to factors such as the thickness of the conductive film.

[0056] In one embodiment of this application, the electrode paste is a tungsten paste. In another embodiment of this application, the electrode paste is a tungsten paste with medium or high sheet resistance.

[0057] In one embodiment of this application, a groove 12 is provided on the side of the heating substrate 1 away from the heating layer 2, and the receiving hole 11 is exposed in the groove 12. The groove 12 facilitates the welding of electrode leads to the pads 211.

[0058] In one embodiment of this application, each electrode unit 21 extends along the winding direction of the heating substrate 1, and multiple electrode units 21 are spaced apart along the axial direction of the winding direction of the heating substrate 1.

[0059] In one embodiment of this application, the resistance of multiple electrode units 21 gradually increases along the axial direction of the winding direction of the heating substrate 1. When multiple electrode units 21 are connected to the circuit, the voltage distributed by each electrode unit 21 tends to be the same along the direction of current inflow, and the heat generated by each electrode unit 21 is also approximately the same, thereby making the heat distribution of the heating component 10 on the axis more uniform.

[0060] In one embodiment of this application, the heating unit 22 includes multiple heating tracks 221, each heating track 221 extending along the axial direction of the winding direction of the heating substrate 1, and the multiple heating tracks 221 are distributed at intervals along the winding direction of the heating substrate 1.

[0061] In one embodiment of this application, the dimension of the heating trajectory 221 in the winding direction of the heating substrate 1 is the width of the heating trajectory 221, and at least one heating trajectory 221 has a different width from the other heating trajectories 221. In this way, the resistance distribution on the heating unit 22 can be adjusted according to the requirements, thereby enabling the temperature field distribution of the heating substrate 1 to meet the different heating requirements of the aerosol generation products.

[0062] In one embodiment of this application, the ratio of the sheet resistance of the heating unit 22 to the sheet resistance of the electrode unit 21 is greater than or equal to 8. In another embodiment of this application, the ratio of the sheet resistance of the heating unit 22 to the sheet resistance of the electrode unit 21 is 8, 10, 12, or 16.

[0063] In one embodiment of this application, the heating substrate 1 includes at least one wound layer, such that the heating substrate 1 can be formed into a column shape after being wound. The heating substrate 1 has good supporting properties, which facilitates the placement of the heating layer 2 on the surface of the heating substrate 1. During winding, the heating layer 2 can be wound onto the radially inner surface of the wound layer.

[0064] It should be noted that the term "winding layer" here can be understood as a columnar structure formed when the heating substrate 1 is wound; when the heating substrate 1 is wound multiple times, a corresponding number of winding layers can be formed. In one embodiment of this application, the number of winding layers of the heating substrate 1 can be 1, 1.5, 1.8, 2, 2.2, 3, etc.

[0065] In one embodiment of this application, the heating layer 2 is wound with 0.8-3 turns. In another embodiment, the heating layer 2 is wound with 0.8 turns. In this case, after the heating substrate 1 is wound, the two ends of the heating unit 22 are still spaced a certain distance apart. Electrode units 21 are respectively provided at both ends of the heating unit 22 to facilitate the entry of external current into the heating unit 22. Furthermore, during the heating process, heat radiates between the two ends of the heating unit 22, ensuring that the heat in the heating component 10 is still evenly distributed along the axis. In another embodiment, the heating layer 2 is wound with 1, 2, or 3 turns, ensuring that the heating layer 2 is evenly distributed along the axis and circumference, resulting in more uniform heating of the heating component 10.

[0066] In one embodiment of this application, the thickness of the winding layer is 0.12mm-0.16mm. In one embodiment of this application, the thickness of the winding layer is 0.14mm-0.15mm. In one embodiment of this application, the thickness of the winding layer is 0.12mm, 0.13mm, 0.14mm, 0.15mm, or 0.16mm.

[0067] In one embodiment of this application, the heating substrate 1 includes adjacent and stacked first and second winding layers. The first winding layer has a first joint, and the second winding layer has a second joint. The first and second joints are offset in the circumferential direction of the heating component 10. The first winding layer is located radially inside the second winding layer, and the heating layer is disposed on the radially inner surface of the first winding layer. The offset of the first and second joints in the circumferential direction of the heating component 10 causes the stress-weak areas of the first and second winding layers to be staggered, resulting in better support of the heating substrate 1 and a stronger structure of the heating component 10.

[0068] In one embodiment of this application, the thickness of the heating substrate 1 is 0.1mm-0.6mm. In one embodiment of this application, the thickness of the heating substrate 1 is 0.15mm-0.35mm. In one embodiment of this application, the thickness of the heating substrate 1 is 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.5mm, or 0.6mm.

[0069] In one embodiment of this application, the thickness of the heating layer 2 is 5μm-30μm. In another embodiment of this application, the thickness of the heating layer 2 is 10μm-20μm. In yet another embodiment of this application, the thickness of the heating layer 2 is 5μm, 6μm, 7μm, 8μm, 10μm, 12μm, 15μm, 18μm, 20μm, 25μm, 27μm, 28μm, or 30μm.

[0070] In one embodiment of this application, the thickness of the heating unit 22 is 5μm-30μm. In another embodiment of this application, the thickness of the heating unit 22 is 10μm-20μm. In yet another embodiment of this application, the thickness of the heating unit 22 is 5μm, 6μm, 7μm, 8μm, 10μm, 12μm, 15μm, 18μm, 20μm, 25μm, 27μm, 28μm, or 30μm.

[0071] In one embodiment of this application, the thickness of electrode unit 21 is 5μm-30μm. In another embodiment of this application, the thickness of electrode unit 21 is 10μm-20μm. In yet another embodiment of this application, the thickness of electrode unit 21 is 5μm, 6μm, 7μm, 8μm, 10μm, 12μm, 15μm, 18μm, 20μm, 25μm, 27μm, 28μm, or 30μm.

[0072] In one embodiment of this application, the dimension of the heating unit 22 along the axial direction of the winding direction is greater than or equal to 0.50 mm, that is, the width of the heating unit 22 along the axial direction of the winding direction of the heating substrate 1 is greater than or equal to 0.5 mm. In another embodiment of this application, the dimension of the heating unit 22 along the axial direction of the winding direction can be 0.50 mm, 0.55 mm, 0.60 mm, or 0.70 mm.

[0073] In one embodiment of this application, an insulating layer is provided on the side of the heating layer 2 away from the heating substrate. In another embodiment of this application, the insulating layer may include an insulating enamel layer.

[0074] An embodiment of this application also provides an aerosol generating device 100, including a battery assembly 20 and the aforementioned heating assembly 10, wherein the battery assembly 20 provides electrical energy to the heating assembly 10.

[0075] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A heating element, characterized in that, include: Heating substrate; A heating layer is disposed on the heating substrate; The heating substrate is wound to form a hollow cylindrical shape, and the aerosol-generated product is suitable for insertion into the cylindrical structure. The heating layer is disposed on the radially inward surface of the heating substrate.

2. The heating component according to claim 1, characterized in that, The heating substrate includes an alumina cast sheet.

3. The heating component according to claim 1, characterized in that, The heating substrate includes at least one wound layer.

4. The heating component according to claim 1, characterized in that, The thickness of the winding layer is 0.12mm-0.16mm; and / or the thickness of the winding layer is 0.14mm-0.15mm.

5. The heating component according to claim 1, characterized in that, The heating substrate includes an adjacent and stacked first winding layer and a second winding layer. The first winding layer has a first seam, and the second winding layer has a second seam. The first seam and the second seam are offset in the circumferential direction of the heating component. The first winding layer is located radially inside the second winding layer, and the heating layer is disposed on the radially inner surface of the first winding layer.

6. The heating component according to claim 1, characterized in that, The heating layer is wound 0.8-3 times.

7. The heating component according to claim 1, characterized in that, The heating layer includes an electrode unit and a heating unit, the heating unit being electrically connected to the electrode unit, and the electrode unit having a solder pad for receiving current.

8. The heating element according to claim 7, characterized in that, The heating substrate has a receiving hole corresponding to the solder pad.

9. The heating element according to claim 8, characterized in that, The receiving hole is a circular through hole with a diameter of 0.1mm-0.6mm; and / or the diameter of the receiving hole is 0.15mm-0.3mm.

10. The heating component according to claim 8, characterized in that, Electrode slurry is disposed in the receiving hole, and the sheet resistance of the electrode slurry is 0.03Ω / □-0.08Ω / □; and / or the sheet resistance of the electrode slurry is 0.04Ω / □-0.06Ω / □.

11. The heating component according to claim 8, characterized in that, A groove is provided on the side of the heating substrate away from the heating layer, and the receiving hole is exposed in the groove.

12. The heating component according to claim 7, characterized in that, The heating unit includes multiple heating tracks, each of which extends along the axial direction of the winding direction of the heating substrate, and the multiple heating tracks are distributed at intervals along the winding direction of the heating substrate.

13. The heating component according to claim 1, characterized in that, The ratio of the sheet resistance of the heating unit to the sheet resistance of the electrode unit is greater than or equal to 8.

14. The heating component according to claim 1, characterized in that, The thickness of the heating substrate is 0.1mm-0.6mm; and / or the thickness of the heating substrate is 0.15mm-0.35mm; and / or the thickness of the heating layer is 5μm-30μm; and / or the thickness of the heating layer is 10μm-20μm.

15. The heating component according to claim 7, characterized in that, The thickness of the heating element is 5μm-30μm; and / or the thickness of the heating element is 10μm-20μm; and / or the thickness of the electrode element is 5μm-30μm; and / or the thickness of the electrode element is 10μm-20μm; and / or the dimension of the heating element along the axial direction of the winding direction is greater than or equal to 0.50mm.

16. The heating component according to claim 1, characterized in that, An insulating layer is provided on the side of the heating layer away from the heating substrate.

17. An aerosol generating device, characterized in that, It includes a battery assembly and a heating component as described in any one of claims 1-16, wherein the battery assembly is used to provide electrical energy to the heating component.

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