Heat-generating core, aerosol generator, and aerosol generation device

Abstract

The application provides a heating core, an aerosol generator and an aerosol generating device, and belongs to the technical field of aerosol generating devices. The heating core comprises a first liquid guiding layer, a preheating layer, a second liquid guiding layer and a main heating layer. The first liquid guiding layer, the preheating layer, the second liquid guiding layer and the main heating layer are sequentially arranged along the thickness direction of the heating core, and the first liquid guiding layer, the preheating layer, the second liquid guiding layer and the main heating layer are sequentially connected. By arranging the heating core with the preheating layer, the aerosol substrate in the first liquid guiding layer can be preheated to reduce the viscosity of the aerosol substrate, so that the flow rate of the first liquid guiding layer can be improved. Since the aerosol substrate passing through the preheating layer can flow to the second liquid guiding layer, the flow rate of the second liquid guiding layer can also be improved, so as to avoid the insufficient liquid guiding of the heating core in the prior art. In the application, the heating core comprises the first liquid guiding layer and the second liquid guiding layer, and the structure of the second liquid guiding layer can be different from that of the first liquid guiding layer.

Description

Technical Field

[0001] This application belongs to the technical field of aerosol generating devices, and particularly relates to a heating core, an aerosol generator, and an aerosol generating device. Background Technology

[0002] An aerosol generator is a device used to heat an aerosol matrix to form an aerosol. An aerosol generator includes a heating element, which heats the aerosol matrix. For aerosol matrices with high viscosity and high sugar content, some existing heating elements are prone to insufficient liquid conduction and severe coking during use, thus affecting the heating element's working efficiency. Utility Model Content

[0003] The purpose of this application is to provide a heating element, an aerosol generator, and an aerosol generating device to solve the technical problem that some existing heating elements are prone to insufficient liquid conduction during use.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: The first aspect of this application provides a heating core, including a first liquid guiding layer, a preheating layer, a second liquid guiding layer and a main heating layer, wherein the first liquid guiding layer, the preheating layer, the second liquid guiding layer and the main heating layer are arranged sequentially along the thickness direction of the heating core, and the first liquid guiding layer, the preheating layer, the second liquid guiding layer and the main heating layer are connected sequentially.

[0005] In some implementations, the spacing between the preheating layer and the main heating layer ranges from 0.2 mm to 0.6 mm.

[0006] In some implementations, the first liquid guiding layer includes a first plate surface and a second plate surface disposed opposite to each other along its thickness direction, and the second liquid guiding layer is provided with a plurality of liquid guiding holes, the two ends of which extend to the first plate surface and the second plate surface, respectively.

[0007] In some implementations, the surface of the second liquid guiding layer is a smooth surface.

[0008] In some implementations, the second liquid guiding layer is a high-temperature resistant glass substrate.

[0009] In some implementations, the preheating layer includes a first end and a second end disposed opposite each other along the length direction, both of which extend relative to the edges of the first and second liquid guiding layers to form the electrode region of the preheating layer.

[0010] In some implementations, the thickness of the second liquid guiding layer is no greater than the thickness of the first liquid guiding layer.

[0011] In some implementations, the thickness of the second liquid guiding layer ranges from 0.2 mm to 0.6 mm; and / or, the thickness of the first liquid guiding layer ranges from 0.5 mm to 2 mm.

[0012] In some implementations, an adhesive layer is provided at least in the following locations: Between the first liquid guiding layer and the preheating layer; Between the preheating layer and the second liquid guiding layer; Between the second liquid guiding layer and the main heating layer.

[0013] In some implementations, the adhesive layer must satisfy at least one of the following conditions: The thickness of the adhesive layer ranges from 10μm to 50μm; The adhesive layer includes a water-soluble silicate layer.

[0014] In some implementations, the first liquid guiding layer satisfies at least one of the following conditions: The first liquid-conducting layer is a porous ceramic component; The porosity of the first liquid-conducting layer is 40%-60%; The liquid conduction rate of the first liquid-conducting layer is 5 μL / s-8 μL / s; The first liquid-conducting layer has a liquid retention capacity of 0.3 mL / .

[0015] In some implementations, the preheating layer must satisfy at least one of the following conditions: The preheating layer is a stamped or etched metal mesh; The thickness of the preheating layer ranges from 0.04mm to 0.08mm; The operating temperature of the preheating layer is configured to be 120℃-160℃.

[0016] In some implementations, the second liquid guiding layer must satisfy at least one of the following conditions: The second fluid-guiding layer is a laser-drilled part; The pore size range of the second liquid-conducting layer is 50μm-100μm; The second liquid-guiding layer has a pore density of 200 / -500 pieces / ; The conductivity rate of the second liquid-conducting layer is 3 μL / s-5 μL / s.

[0017] In some implementations, the main heating layer must satisfy at least one of the following conditions: The main heating layer is a stamped or etched metal mesh; The thickness of the main heating layer ranges from 0.04mm to 0.08mm; The operating temperature of the main heating layer is configured to be 180℃-220℃.

[0018] In some implementations, the thickness of the heating element ranges from 1.2mm to 3mm.

[0019] A second aspect of this application provides an aerosol generator, including a heating element as provided in any of the above technical solutions.

[0020] A third aspect of this application provides an aerosol generating device, including a battery assembly and an aerosol generator as described above, wherein the battery assembly is connected to the aerosol generator.

[0021] The beneficial effects of this application are as follows: In this embodiment, by providing a preheating layer for the heating core, the aerosol matrix in the first liquid guiding layer can be preheated to reduce the viscosity of the aerosol matrix, thereby increasing the flow rate of the first liquid guiding layer. Since the aerosol matrix passing through the preheating layer can flow to the second liquid guiding layer, the flow rate of the second liquid guiding layer can also be increased, thus avoiding the insufficient liquid guiding situation of the heating core in the prior art. In addition, in this embodiment, the heating core includes a first liquid guiding layer and a second liquid guiding layer, which provides the premise for setting the structure of the second liquid guiding layer to be different from that of the first liquid guiding layer. Therefore, the first liquid guiding layer can be set to have the functions of liquid guiding and liquid locking, and the second liquid guiding layer is mainly set to have the function of liquid guiding and is not easy to adsorb coking substances. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a simplified structural diagram of a heating element in existing related technologies; Figure 2 Schematic diagram of the structure of the heating element provided in some embodiments of this application Figure 1 ; Figure 3 Schematic diagram of the structure of the heating element provided in some embodiments of this application Figure 2 ; Figure 4 This is a schematic diagram of the exploded structure of the heating element provided in some embodiments of this application; Figure 5 This is a cross-sectional schematic diagram of a heating element provided in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of the second liquid guiding layer provided in some embodiments of this application.

[0024] The following are the labeling elements in the figure: 100 - Heating core; 200 - Ceramic liquid guiding layer; 300 - Heating element; 10 - First liquid guiding layer; 20 - Preheating layer; 30 - Second liquid guiding layer; 40 - Main heating layer; 50 - Adhesive layer; 21-Preheating body; 22-First end; 23-Second end; 31-First plate surface; 32-Second plate surface; 33-Liquid guide hole; 41-Main heating body; 42-First electrode; 43-Second electrode; 51-First adhesive layer; 52-Second adhesive layer; 53-Third adhesive layer. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0026] In the description of this application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inner", "outer", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] To facilitate a clear description of the technical solutions of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" do not necessarily imply that they are different.

[0028] In this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] It should be noted that, in this application, the words "in one embodiment," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in one embodiment," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "in one embodiment," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner.

[0031] Please see Figure 1 , Figure 1 This is a simplified structural diagram of a heating element in existing related technologies. (Example:) Figure 1 As shown, the heating core in the existing related technology includes a ceramic liquid-conducting layer 200 and a heating element 300. The heating element 300 is disposed on one side of the ceramic liquid-conducting layer 200. The ceramic liquid-conducting layer 200 has a porous structure and mainly relies on capillary action to adsorb aerosol matrix.

[0032] When the aerosol matrix is ​​a high-viscosity liquid, the high-viscosity liquid has poor fluidity and high surface tension, making it difficult to quickly and fully penetrate the micropores of the ceramic liquid-conducting layer 200. This results in insufficient liquid supply to the heating core in some areas or throughout the entire heating core, leading to dry burning of the heating core.

[0033] In addition, when the aerosol matrix contains sugars (such as ethyl maltol and sucralose), the sugars increase the viscosity of the aerosol matrix, and sugar molecules are easily adsorbed on the pore surface of the ceramic liquid-conducting layer 200, further hindering permeation. Furthermore, at high temperatures, sugars are prone to caramelization and Maillard reactions. The resulting caramelized products adhere to the surface and internal pores of the ceramic liquid-conducting layer 200, clogging micropores and deteriorating the liquid-conducting performance. Moreover, when there is a lot of caramelized products adhering to the surface of the ceramic liquid-conducting layer 200, it will hinder heat transfer, requiring the heating core to reach the evaporation temperature of the aerosol matrix with higher power or for a longer time, which exacerbates the risk of aerosol matrix caramelization. Continuous heating of caramelized products will produce burnt, bitter, and other off-flavors, resulting in unpleasant odors and tastes, and will also shorten the life of the heating core.

[0034] To address the technical problem of insufficient fluid conduction in some existing heating elements during use, this application provides a heating element. The heating element provided in this application is described in further detail below with reference to the accompanying drawings.

[0035] Please see Figures 2-5 , Figure 2 Schematic diagram of the structure of the heating element 100 provided in some embodiments of this application Figure 1 , Figure 3 Schematic diagram of the structure of the heating element 100 provided in some embodiments of this application Figure 2 , Figure 4 This is an exploded structural diagram of the heating element 100 provided in some embodiments of this application. Figure 5 This is a cross-sectional schematic diagram of the heating element 100 provided in some embodiments of this application.

[0036] Please see Figure 2 The heating core 100 provided in this application embodiment includes a first liquid guiding layer 10, a preheating layer 20, a second liquid guiding layer 30, and a main heating layer 40. The first liquid guiding layer 10, the preheating layer 20, the second liquid guiding layer 30, and the main heating layer 40 are arranged sequentially along the thickness direction of the heating core 100, and the first liquid guiding layer 10, the preheating layer 20, the second liquid guiding layer 30, and the main heating layer 40 are connected sequentially.

[0037] The first liquid guiding layer 10 has a porous structure and functions as both liquid guiding and liquid locking. That is, the aerosol matrix can flow through the first liquid guiding layer 10 to the preheating layer 20 to achieve the function of liquid guiding. At the same time, the first liquid guiding layer 10 can also adsorb the aerosol matrix to achieve the function of liquid locking, so that when the heating core 100 is not in working state, the aerosol matrix is ​​not easy to flow through the first liquid guiding layer 10 to the preheating layer 20.

[0038] The preheating layer 20 operates at a temperature lower than the main heating layer 40. The primary function of the preheating layer 20 is to preheat the aerosol matrix to reduce its viscosity, thereby increasing the flow rate of the first liquid guiding layer 10. Specifically, when the preheating layer 20 is in operation, heat can be transferred to the first liquid guiding layer 10 and the aerosol matrix within it, causing the temperature of the aerosol matrix to rise. This, in turn, lowers the temperature of the aerosol matrix, further increasing the flow rate of the first liquid guiding layer 10.

[0039] It should be noted that the working temperature of the preheating layer 20 can be used to preheat the aerosol matrix in the first liquid guiding layer 10 to reduce the viscosity of the aerosol matrix. Since the working temperature of the preheating layer 20 is relatively low, the aerosol matrix in the first liquid guiding layer 10 is less likely to undergo caramelization and Maillard reaction, thereby reducing the probability of caramelized substances adhering to the surface and internal pores of the first liquid guiding layer 10.

[0040] It should be noted that caramelization refers to the process by which sugars (mainly reducing sugars such as sucrose, glucose, and fructose, or non-reducing sugars) undergo a series of reactions, including dehydration, degradation, and polymerization, when heated to a specific temperature (usually above 110°C, in a dry or low-moisture environment) without the participation of amino compounds (such as proteins and amino acids), ultimately producing brownish-red caramel substances accompanied by changes in aroma and flavor. The Maillard reaction, on the other hand, refers to the complex dehydration, rearrangement, and polymerization reactions that occur between compounds containing free amino groups (such as proteins and amino acids) and compounds containing carbonyl groups (such as reducing sugars such as glucose and fructose) under heating conditions, ultimately producing brownish-red melanoidins, accompanied by the generation of a large amount of volatile aroma substances.

[0041] The second liquid guiding layer 30 mainly serves to guide the liquid. The aerosol matrix that has passed through the preheating layer 20 can flow to the second liquid guiding layer 30. Since the temperature of the aerosol matrix increases and the viscosity decreases after passing through the preheating layer 20, the aerosol matrix can easily pass through the second liquid guiding layer 30, thereby increasing the rate at which the aerosol matrix passes through the second liquid guiding layer 30.

[0042] The main heating layer 40 is supported on the second liquid guiding layer 30. The main heating layer 40 mainly heats the aerosol matrix to cause it to evaporate. When the evaporated aerosol matrix comes into contact with air, it can condense to form an aerosol. The second liquid guiding layer 30 is connected to the main heating layer 40. Considering that sugars are prone to caramelization and Maillard reactions at high temperatures, in some examples, the surface of the second liquid guiding layer 30 can be designed to prevent the adsorption of caramelized substances.

[0043] In this embodiment, by providing a preheating layer 20 to the heating core 100, the aerosol matrix in the first liquid guiding layer 10 can be preheated to reduce the viscosity of the aerosol matrix, thereby increasing the flow rate of the first liquid guiding layer 10. Since the aerosol matrix passing through the preheating layer 20 can flow to the second liquid guiding layer 30, the flow rate of the second liquid guiding layer 30 can also be increased, thus avoiding the insufficient liquid guiding situation in the heating core 100 of the prior art. In addition, in this embodiment, the heating core 100 includes a first liquid guiding layer 10 and a second liquid guiding layer 30, which provides the premise for setting the structure of the second liquid guiding layer 30 to be different from that of the first liquid guiding layer 10. Therefore, the first liquid guiding layer 10 can be set to have the functions of liquid guiding and liquid locking, and the second liquid guiding layer 30 is mainly set to have the function of liquid guiding and is not easy to adsorb coking substances.

[0044] In some embodiments, an adhesive layer 50 is provided between the first liquid guiding layer 10 and the preheating layer 20 and / or between the preheating layer 20 and the second liquid guiding layer 30 and / or between the second liquid guiding layer 30 and the main heating layer 40.

[0045] In some examples, the first liquid guiding layer 10 and the preheating layer 20, the preheating layer 20 and the second liquid guiding layer 30, and the second liquid guiding layer 30 and the main heating layer 40 can all be connected by adhesive layers 50. For ease of description, the adhesive layer 50 between the first liquid guiding layer 10 and the preheating layer 20 is referred to as the first adhesive layer 51, the adhesive layer 50 between the preheating layer 20 and the second liquid guiding layer 30 is referred to as the second adhesive layer 52, and the adhesive layer 50 between the second liquid guiding layer 30 and the main heating layer 40 is referred to as the third adhesive layer 53. Please refer to [link to relevant documentation]. Figure 4 The diagram illustrates the first adhesive layer 51, the second adhesive layer 52, and the third adhesive layer 53.

[0046] It should be noted that the adhesive layer 50 between the two sides of the heating core 100 should not affect the flow of the aerosol matrix from the first liquid guiding layer 10 through the preheating layer 20 and the second liquid guiding layer 30 to the main heating layer 40.

[0047] In this embodiment, the heating core 100 includes an adhesive layer 50 and two adjacent layers of the heating core 100 are connected by the adhesive layer 50. The connection method is simple and facilitates the processing and manufacturing of the heating core 100.

[0048] It should be noted that, as mentioned in the above embodiment, an adhesive layer 50 may be provided between the first liquid guiding layer 10 and the preheating layer 20. In other embodiments, the preheating layer 20 may also be integrally formed on the first liquid guiding layer 10.

[0049] It should be noted that, as mentioned in the above embodiment, an adhesive layer 50 is provided between the second liquid guiding layer 30 and the main heating layer 40. In other embodiments, the main heating layer 40 may also be integrally formed on the second liquid guiding layer 30.

[0050] It should be noted that, as mentioned in the above embodiment, two adjacent layers of the heating core 100 can be connected by an adhesive layer 50. In other embodiments, an auxiliary clamp can be provided, and the first liquid guiding layer 10, the preheating layer 20, the second liquid guiding layer 30 and the main heating layer 40 can be clamped together by the auxiliary clamp to achieve connection.

[0051] In some embodiments, the thickness of the adhesive layer 50 ranges from 10 μm to 50 μm.

[0052] It should be noted that the thickness of the adhesive layer 50 refers to the thickness of the adhesive layer 50 formed after the adhesive has cured.

[0053] In some examples, the thickness of the adhesive layer 50 can be set to a range of 10μm-20μm, 20μm-30μm, 30μm-40μm, or 40μm-50μm, etc.

[0054] In this embodiment, the thickness of the adhesive layer 50 is set to be between 10μm and 50μm to avoid the adhesive layer 50 being too thin and affecting the bonding strength between the two layers, and to avoid the adhesive layer 50 being too thick and increasing the thickness of the heating core 100 and affecting the liquid conduction rate.

[0055] In some embodiments, the adhesive layer 50 includes a water-soluble silicate layer.

[0056] Water-soluble silicates are inorganic adhesives. The core principle of their adhesive function comes from their own hydrolytic and gelling properties, which firmly bond the materials to be bonded (such as metals, ceramics, stone, sand, etc.).

[0057] In some examples, the material for the adhesive layer 50 may include sodium silicate or potassium silicate, etc.

[0058] In some examples, the material for the adhesive layer 50 may include sodium silicate, and the sodium silicate concentration is 10-30 wt%.

[0059] In some embodiments, the adhesive layer 50 may be configured to have an adhesive strength of not less than 1.5 MPa, in order to improve the stability of the heating core 100 structure.

[0060] In some embodiments, the spacing between the preheating layer 20 and the main heating layer 40 ranges from 0.2 mm to 0.6 mm.

[0061] In some examples, the spacing between the preheating layer 20 and the main heating layer 40 can be set to 0.2mm-0.3mm, 0.3mm-0.4mm, 0.4mm-0.5mm, or 0.5mm-0.6mm, etc.

[0062] During operation, the preheating layer 20 reduces the viscosity of the liquid. The aerosol matrix is ​​transferred to the main heating layer 40 through the second liquid guiding layer 30. When the distance between the preheating layer 20 and the main heating layer 40 is less than 0.2 mm, the thickness of the second liquid guiding layer 30 will be less than 0.2 mm, resulting in low strength of the second liquid guiding layer 30. In addition, it will cause the aerosol matrix to reach the main heating layer 40 quickly, resulting in leakage. When the distance between the preheating layer 20 and the main heating layer 40 is greater than 0.6 mm, the path for the aerosol matrix to be transferred to the main heating layer 40 through the second liquid guiding layer 30 is too long, which may cause the preheated aerosol matrix to cool down, resulting in poor flow and pore blockage.

[0063] In this embodiment, the spacing between the preheating layer 20 and the main heating layer 40 is set to be 0.2-0.6 mm to ensure the normal operation of the heating core 100.

[0064] In some embodiments, the surface of the second liquid guiding layer 30 is a smooth surface.

[0065] It should be noted that, for the surface of the second liquid guiding layer 30 to be a smooth surface, only the outer surface of the second liquid guiding layer 30 can be set to be a smooth surface, or not only the outer surface of the second liquid guiding layer 30 can be set to be a smooth surface, but also the inner surface of the second liquid guiding layer 30 (i.e., the hole wall surface of the hole on the second liquid guiding layer 30) can be set to be a smooth surface.

[0066] It should be noted that a smooth surface refers to a surface with a roughness lower than that of the first liquid guiding layer 10 and which does not easily adhere to the sol matrix.

[0067] In this embodiment, by setting the surface of the second liquid guiding layer 30 to be a smooth surface, the adhesion of sugary substances and high-viscosity aerosol matrix can be reduced, thereby reducing caramelization and Maillard reaction, reducing the occurrence of pore blockage and caramelized material adhering to the second liquid guiding layer 30, and at the same time, it can minimize the generation of unpleasant odors and tastes, minimize the generation of burnt taste, bitter taste and other off-flavors from continuous heating of caramelized material, and improve the lifespan of the heating core.

[0068] In some embodiments, the second liquid guiding layer 30 is a high-temperature resistant glass substrate.

[0069] In some examples, the material of the second liquid-conducting layer 30 is microcrystalline glass, borosilicate glass, or aluminosilicate glass. Microcrystalline glass is a new type of inorganic non-metallic material formed by precipitating a large number of tiny, uniform crystals inside the base glass (mother glass) through a specific heat treatment process. Borosilicate glass is a special glass with silicon dioxide as the main component and a high proportion of boron oxide added. Aluminosilicate glass is a special glass with silicon dioxide and aluminum oxide as the main components.

[0070] In this embodiment, the second liquid guiding layer 30 is made of a high-temperature resistant glass substrate, so that the surface of the second liquid guiding layer 30 is a smooth surface, thereby reducing the occurrence of pore blockage and charring on the second liquid guiding layer 30.

[0071] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of the second liquid guiding layer 30 provided in some embodiments of this application.

[0072] In some embodiments, see Figure 5 The second liquid guiding layer 30 includes a first plate surface 31 and a second plate surface 32 disposed opposite to each other along its thickness direction. The second liquid guiding layer 30 is provided with a plurality of liquid guiding holes 33, and the two ends of the liquid guiding holes 33 extend to the first plate surface 31 and the second plate surface 32 respectively.

[0073] In some examples, the axis of the liquid guiding hole 33 may be set to be parallel to the thickness direction of the second liquid guiding layer 30; or, in other examples, the axis of the liquid guiding hole 33 may be set to have an angle with the thickness direction of the second liquid guiding layer 30 within a set range.

[0074] In this embodiment, the liquid guiding hole 33 is provided to extend to the first plate surface 31 and the second plate surface 32 of the second liquid guiding layer 30 at both ends, so as to facilitate the rapid liquid guiding of the second liquid guiding layer 30.

[0075] In some embodiments, the pore size of the second liquid guiding layer 30 ranges from 50 μm to 100 μm.

[0076] In some examples, the pore size of the second liquid guiding layer 30 can be set to 50μm-60μm, 60μm-70μm, 70μm-80μm, 80μm-90μm, or 90μm-100μm, etc.

[0077] It should be noted that the size of each pore on the second liquid guiding layer 30 can be the same, or the second liquid guiding layer 30 can include liquid guiding holes 33 with different pore sizes.

[0078] In this embodiment, by setting the pore size range of the second liquid guiding layer 30 to 50μm-100μm, while considering increasing the liquid guiding rate of the second liquid guiding layer 30, it also takes into account avoiding leakage caused by the excessively fast liquid guiding speed of the second liquid guiding layer 30.

[0079] In some embodiments, the pore density of the second liquid guiding layer 30 is 200 pores / -500 pieces / .

[0080] Regarding pore density, the pore density of the second liquid-conducting layer 30 is 200 pores / For example, this refers to setting 200 liquid guiding holes per square centimeter.

[0081] In some examples, the pore density of the second liquid guiding layer 30 can be set to 200 pores / -300 pieces / Or 300 / -400 pieces / Or 400 / -500 pieces / etc.

[0082] In this embodiment, the pore density of the second liquid guiding layer 30 is set to 200 pores / -500 pieces / This is to avoid insufficient liquid supply due to too small a pore density in the second liquid guiding layer 30, and excessive liquid leakage due to too large a pore density in the second liquid guiding layer 30.

[0083] In some embodiments, the thickness of the second liquid guiding layer 30 ranges from 0.2 mm to 0.5 mm.

[0084] In some examples, the thickness of the second liquid guiding layer 30 can be set to 0.2mm-0.3mm, 0.3mm-0.4mm, or 0.4mm-0.5mm, etc.

[0085] In this embodiment of the application, by limiting the thickness range of the second liquid guiding layer 30, the phenomenon of leakage caused by excessively fast liquid guiding speed due to excessively small thickness of the second liquid guiding layer 30 is avoided, as well as the phenomenon of low liquid guiding rate due to excessively large thickness of the second liquid guiding layer 30 is avoided.

[0086] It should be noted that the thickness range of the second liquid guiding layer 30 can be reasonably set according to the viscosity of the aerosol matrix. For example, when the viscosity of the aerosol matrix is ​​relatively high, the thickness of the second liquid guiding layer 30 can be reduced to improve the liquid guiding rate.

[0087] In some embodiments, the liquid conduction rate of the second liquid-conducting layer 30 is 3 μL / s to 5 μL / s.

[0088] Regarding the conductivity rate of the second liquid-conducting layer 30, taking a conductivity rate of 3 μL / s as an example, this means that the amount of liquid conducted by the second liquid-conducting layer 30 per second is 3 microliters. It should be noted that the conductivity rate of the second liquid-conducting layer 30 mentioned in the embodiments of this application refers to the conductivity rate of the second liquid-conducting layer 30 at room temperature.

[0089] In some examples, the liquid conduction rate of the second liquid-conducting layer 30 can be set to 3 μL / s-3.5 μL / s, 3.5 μL / s-4 μL / s, 4 μL / s-4.5 μL / s, or 4.5 μL / s-5 μL / s, etc.

[0090] In this embodiment, the liquid conduction rate of the second liquid conduction layer 30 is set to 3μL / s-5μL / s to avoid insufficient liquid supply due to a low liquid conduction rate, and to avoid leakage due to an excessive liquid conduction rate.

[0091] In some embodiments, the second liquid guiding layer 30 is a laser-drilled part.

[0092] Laser drilling is an advanced processing technology that uses a high-energy-density laser beam to locally heat, melt, or even vaporize materials to form holes. Laser drilling has advantages such as high precision, high speed, and small heat-affected zone.

[0093] In some examples, the second liquid guiding layer 30 may be set as a high-temperature resistant glass substrate, and the liquid guiding holes 33 on the second liquid guiding layer 30 may be formed by laser drilling.

[0094] In this embodiment of the application, by setting the second liquid guiding layer 30 as a laser-drilled part, the precision of the liquid guiding holes 33 on the second liquid guiding layer 30 can be high.

[0095] In some embodiments, the first liquid guiding layer 10 is a porous ceramic component.

[0096] The porous ceramic contains a large number of interconnected pores, forming a three-dimensional network liquid storage space. These pores adsorb liquid through capillary action. When the preheating layer 20 is heated, the liquid viscosity decreases and the liquid can be released, which plays a good role in locking the liquid.

[0097] In some examples, the first liquid guiding layer 10 can be set to a porous ceramic sintered from materials such as quartz, alumina, silicon carbide, and zirconium oxide.

[0098] In this embodiment of the application, by setting the first liquid guiding layer 10 as a porous ceramic part, the first liquid guiding layer 10 can simultaneously have the functions of guiding liquid and locking liquid.

[0099] In some embodiments, the thickness of the first liquid guiding layer 10 ranges from 0.5 mm to 2 mm.

[0100] In some examples, the thickness of the first liquid guiding layer 10 can be set to a range of 0.5mm-1mm, 1mm-1.5mm, or 1.5mm-2mm, etc.

[0101] In some examples, the thickness of the first liquid guiding layer 10 can be set to 0.5±0.05mm, 1.0±0.05mm, or 2.0±0.1mm, etc. Taking the thickness of the first liquid guiding layer 10 as 0.5±0.05mm as an example, ±0.05mm means that the allowable tolerance range when processing the first liquid guiding layer 10 is -0.05mm to +0.05mm.

[0102] In this embodiment, the thickness of the first liquid guiding layer 10 is limited to 0.5-2mm to prevent the thickness of the first liquid guiding element from being too large and affecting the liquid guiding rate, or too small and affecting the liquid locking effect of the first liquid guiding element.

[0103] It should be noted that the thickness range of the first liquid guiding layer 10 can be reasonably set according to the viscosity of the aerosol matrix. For example, when the viscosity of the aerosol matrix is ​​relatively high, the thickness of the first liquid guiding layer 10 can be reduced to improve the liquid guiding rate.

[0104] In some embodiments, the porosity of the first liquid guiding layer 10 is 40%-60%.

[0105] Porosity refers to the percentage of pore volume in a material to the total volume. In some examples, the porosity of the first liquid guiding layer 10 can be set to 40%-45%, 45%-50%, 50%-55%, or 55%-60%, etc.

[0106] In this embodiment of the application, the porosity of the first liquid guiding layer 10 is limited to 40%-60% to prevent the porosity of the first liquid guiding layer 10 from being too high and affecting its strength, and to prevent the porosity of the first liquid guiding layer 10 from being too low and not conducive to liquid guiding and liquid locking.

[0107] In some embodiments, the liquid conduction rate of the first liquid-conducting layer 10 is 5 μL / s to 8 μL / s.

[0108] Regarding the conductivity rate of the first liquid-conducting layer 10, taking a conductivity rate of 5 μL / s as an example, it means that the amount of liquid conducted by the first liquid-conducting layer 10 per second is 5 microliters. It should be noted that the conductivity rate of the first liquid-conducting layer 10 mentioned in the embodiments of this application refers to the conductivity rate of the first liquid-conducting layer 10 at room temperature.

[0109] In some examples, the liquid conduction rate of the second liquid-conducting layer 30 can be set to 5μL / s-6μL / s, 6μL / s-7μL / s, or 7μL / s-8μL / s, etc.

[0110] In this embodiment of the application, the liquid conduction rate of the first liquid conduction layer 10 is set to 3μL / s-5μL / s to avoid insufficient liquid supply due to too small a liquid conduction rate, and to avoid leakage due to too large a liquid conduction rate.

[0111] In some embodiments, the liquid-locking capacity of the first liquid-conducting layer 10 is not less than 0.3 mL / .

[0112] The liquid retention capacity (i.e., liquid storage capacity) of the first liquid-conducting layer 10 is related to its porosity, with the liquid retention capacity of the first liquid-conducting layer 10 being 0.3 mL / m³. For example, this means that the first liquid-conducting layer 10 can store 0.3 ml of liquid per square centimeter.

[0113] In some examples, the liquid retention capacity of the first liquid-conducting layer 10 is set to 0.3 mL / Or 0.4 mL / Or 0.5mL / Or 0.6 mL / etc.

[0114] In this embodiment of the application, the liquid-locking capacity of the first liquid-conducting layer 10 is limited to not less than 0.3 mL / This is to ensure that the heating element 100 works normally.

[0115] In some embodiments, see Figure 4 The thickness of the first liquid guiding layer 10 can be set to be greater than the thickness of the second liquid guiding layer 30.

[0116] In some embodiments, see Figure 4 The first liquid guiding layer 10 and the second liquid guiding layer 30 can be set to have the same size. The fact that the first liquid guiding layer 10 and the second liquid guiding layer 30 have the same size means that the cross-sectional area (the section perpendicular to the thickness direction) of the first liquid guiding layer 10 and the cross-sectional area (the section perpendicular to the thickness direction) of the second liquid guiding layer 30 are the same.

[0117] In this embodiment of the application, the second liquid guiding layer 30 may be provided with edges around it so that they do not protrude from the corresponding sides of the first liquid guiding layer 10.

[0118] In some embodiments, see Figure 4 The preheating layer 20 includes a first end 22 and a second end 23 disposed opposite to each other along the length direction. The first end 22 and the second end 23 both extend outward relative to the edge of the first liquid guiding layer 10 and the second liquid guiding layer 30 to form the electrode area of ​​the preheating layer 20.

[0119] Please see Figure 4 The preheating layer 20 includes a preheating body 21, the two ends of which are connected to the first end 22 and the second end 23 respectively. The preheating body 21 is the part of the main preheating aerosol matrix.

[0120] In some examples, the preheating layer 20 can be configured as a single unit.

[0121] In this embodiment, by setting the first end 22 and the second end 23 to extend outward relative to the edge of the first liquid guiding layer 10 and the second liquid guiding layer 30, the preheating layer 20 can be connected to the electrode via pins or the like.

[0122] In some embodiments, the preheating layer 20 is a stamped or etched metal mesh.

[0123] Stamping is a processing method that uses a press and mold to apply external force to metal or non-metal sheets, causing them to undergo plastic deformation or separation, thereby obtaining the desired shape and size. Etching is a process method that selectively removes specific portions of a material surface using chemical or physical methods, achieving nanoscale precision. In the embodiments of this application, the preheating layer 20 is a stamped or etched metal mesh, meaning that the preheating body 21 of the preheating layer 20 is formed into a mesh shape by stamping or etching.

[0124] In some examples, the preheating layer 20 can be made of 304 stainless steel or FeCrAl alloy.

[0125] In this embodiment of the application, by limiting the processing method of the mesh portion of the preheating layer 20, the preheating layer 20 can be easily processed and formed.

[0126] In some embodiments, the thickness of the preheating layer 20 ranges from 0.04 mm to 0.08 mm.

[0127] In some examples, the thickness of the preheating layer 20 can be set to a range of 0.04mm-0.05mm, 0.05mm-0.06mm, 0.06mm-0.07mm, or 0.07mm-0.08mm, etc.

[0128] In some examples, the thickness of the preheating layer 20 can be set to 0.04±0.005mm, 0.06±0.005mm, or 0.08±0.005mm, etc. Taking the thickness of the preheating layer 20 as 0.04±0.005mm as an example, ±0.005mm means that the allowable tolerance range when processing the preheating layer 20 is -0.005mm to +0.005mm.

[0129] In this embodiment of the application, the thickness range of the preheating layer 20 is limited to 0.04mm-0.08mm to prevent the preheating layer 20 from being too thin and having low strength, and to prevent the preheating layer 20 from being too thick and easily overheating.

[0130] In some embodiments, the operating temperature of the preheating layer 20 is configured to be 120°C-160°C.

[0131] In some examples, the operating temperature of the preheating layer 20 can be configured as 120℃-130℃, 130℃-140℃, 140℃-150℃, or 150℃-160℃, etc.

[0132] It should be noted that the operating temperature of the preheating layer 20 can be set differently depending on the viscosity of the aerosol matrix. For example, when the viscosity of the aerosol matrix is ​​relatively high, the operating temperature of the preheating layer 20 can be set higher.

[0133] In some examples, the operating temperature of the preheating layer 20 can be set such that the viscosity of the aerosol matrix is ​​heated to 5-8 cP.

[0134] In some embodiments, the main heating layer 40 is a stamped or etched metal mesh.

[0135] Please see Figure 4 The main heating layer 40 includes a main heating body 41, a first electrode portion 42 and a second electrode portion 43. The first electrode portion 42 and the second electrode portion 43 are disposed at both ends of the main heating body 41. The main heating body 41 mainly heats the aerosol matrix. The main heating body 41 is formed into a mesh by stamping or etching.

[0136] In some examples, the main heating layer 40 can be made of 304 stainless steel or FeCrAl alloy.

[0137] In this embodiment of the application, by limiting the processing method of the mesh portion of the main heating layer 40, the processing and shaping of the main heating layer 40 can be facilitated.

[0138] In some embodiments, see Figure 3 The area of ​​the main heating layer 40 is not greater than the area of ​​the second liquid guiding layer 30, that is, the edge of the main heating layer 40 in the circumferential direction does not protrude beyond the edge of the corresponding side of the second liquid guiding layer 30.

[0139] In some embodiments, the thickness of the main heating layer 40 may be the same as the thickness of the preheating layer 20; or, the thickness of the main heating layer 40 may be different from the thickness of the preheating layer 20.

[0140] In some embodiments, the thickness of the main heating layer 40 ranges from 0.04 mm to 0.08 mm.

[0141] In some examples, the thickness of the main heating layer 40 can be set to a range of 0.04mm-0.05mm, 0.05mm-0.06mm, 0.0mm-0.07mm, or 0.07mm-0.08mm, etc.

[0142] In some examples, the machining tolerance of the main heating layer 40 can be set to ±0.01mm.

[0143] In this embodiment of the application, the thickness range of the main heating layer 40 is limited to 0.04-0.08 mm to prevent the main heating layer 40 from being too thin, resulting in low strength, and to prevent the main heating layer 40 from being too thick, which could easily lead to overheating.

[0144] In some embodiments, the operating temperature of the main heating layer 40 is configured to be 180°C-220°C.

[0145] In some examples, the operating temperature of the main heating layer 40 can be configured as 180℃-190℃, 190℃-200℃, 200℃-210℃, or 210℃-220℃, etc.

[0146] It should be noted that the main heating layer 40 can be set to different operating temperatures depending on the aerosol matrix. For example, the operating temperature of the main heating layer 40 can be set so that the particle size of the aerosol particles after the aerosol matrix evaporates to form aerosols is 0.5-3μm.

[0147] In some embodiments, the thickness of the heating element 100 ranges from 1.2 mm to 3 mm.

[0148] In some examples, the thickness of the heating element 100 can be set to a range of 1.24mm-1.5mm, 1.5mm-2mm, 2mm-2.5mm, or 2.5mm-2.89mm, etc.

[0149] In some embodiments, the parallelism deviation between layers in the heating core 100 is no greater than 0.02 mm.

[0150] In this embodiment, the parallelism deviation of each layer is no greater than 0.02mm, which mainly refers to the parallelism deviation between the first liquid guiding layer 10 and the preheating layer 20 being no greater than 0.02mm, the parallelism deviation between the preheating layer 20 and the second liquid guiding layer 30 being no greater than 0.02mm, and the parallelism deviation between the second liquid guiding layer 30 and the main heating layer 40 being no greater than 0.02mm.

[0151] In some embodiments, see Figure 4 The first liquid guiding layer 10, the preheating layer 20, the second liquid guiding layer 30, and the main heating layer 40 can all be set to be rectangular plates.

[0152] This application provides an aerosol generator, including the heating core 100 provided in any of the above embodiments. A liquid storage chamber is formed inside the aerosol generator, and an aerosol matrix is ​​stored in the liquid storage chamber. The aerosol matrix can penetrate into the heating core 100, and the heating core 100 is used to heat the aerosol matrix in the liquid storage chamber.

[0153] This application provides an aerosol generating device, including a battery assembly and an aerosol generator as described in the above embodiments, wherein the battery assembly is connected to the aerosol generator.

[0154] Regarding the battery assembly, it typically contains a battery and circuit board, etc. The battery assembly provides the necessary power to the aerosol generator through the built-in battery, enabling the aerosol generator to work normally.

[0155] Regarding the connection method between the battery pack and the aerosol generator, the battery pack and the aerosol generator can be detachably connected, for example, by snap-fit ​​connection or magnetic adsorption; or, the battery pack and the aerosol generator can be non-detachably connected.

[0156] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heating element, characterized in that, It includes a first liquid guiding layer (10), a preheating layer (20), a second liquid guiding layer (30), and a main heating layer (40), wherein the first liquid guiding layer (10), the preheating layer (20), the second liquid guiding layer (30), and the main heating layer (40) are arranged sequentially along the thickness direction of the heating core (100), and the first liquid guiding layer (10), the preheating layer (20), the second liquid guiding layer (30), and the main heating layer (40) are connected sequentially.

2. The heating element as described in claim 1, characterized in that, The distance between the preheating layer (20) and the main heating layer (40) is in the range of 0.2mm-0.6mm.

3. The heating element as described in claim 1, characterized in that, The second liquid guiding layer (30) includes a first plate surface (31) and a second plate surface (32) arranged opposite to each other along its thickness direction. The second liquid guiding layer (30) is provided with a plurality of liquid guiding holes (33), and the two ends of the liquid guiding holes (33) extend to the first plate surface (31) and the second plate surface (32) respectively.

4. The heating element as described in claim 1, characterized in that, The surface of the second liquid guiding layer (30) is a smooth surface.

5. The heating element as described in claim 1, characterized in that, The second liquid-conducting layer (30) is a high-temperature resistant glass substrate.

6. The heating element as described in claim 1, characterized in that, The preheating layer (20) includes a first end (22) and a second end (23) disposed opposite each other along the length direction. The first end (22) and the second end (23) both extend relative to the edge of the first liquid guiding layer (10) and the edge of the second liquid guiding layer (30) to form the electrode area of ​​the preheating layer (20).

7. The heating element as described in claim 1, characterized in that, The thickness of the first liquid-conducting layer (10) ranges from 0.5 mm to 2 mm; and / or the thickness of the second liquid-conducting layer (30) ranges from 0.2 mm to 0.5 mm.

8. The heating element as described in any one of claims 1-7, characterized in that, An adhesive layer (50) is provided at least at one of the following locations: Between the first liquid guiding layer (10) and the preheating layer (20); Between the preheating layer (20) and the second liquid guiding layer (30); Between the second liquid guiding layer (30) and the main heating layer (40).

9. The heating element as described in claim 8, characterized in that, The adhesive layer (50) must satisfy at least one of the following conditions: The thickness of the adhesive layer (50) ranges from 10 μm to 50 μm; The adhesive layer (50) includes a water-soluble silicate layer.

10. The heating element as described in any one of claims 1-7, characterized in that, The first liquid-conducting layer (10) must satisfy at least one of the following conditions: The first liquid-conducting layer (10) is a porous ceramic component; The porosity of the first liquid-conducting layer (10) is 40%-60%; The liquid conduction rate of the first liquid-conducting layer (10) is 5 μL / s-8 μL / s; The liquid-locking capacity of the first liquid-conducting layer (10) is not less than 0.3 mL / .

11. The heating element as described in any one of claims 1-7, characterized in that, The preheating layer (20) must satisfy at least one of the following conditions: The preheating layer (20) is a stamped or etched metal mesh; The thickness of the preheating layer (20) ranges from 0.04 mm to 0.08 mm; The working temperature of the preheating layer (20) is configured to be 120℃-160℃.

12. The heating element as described in any one of claims 1-7, characterized in that, The second liquid-conducting layer (30) must satisfy at least one of the following conditions: The second liquid guiding layer (30) is a laser-drilled part; The pore size range of the second liquid-conducting layer (30) is 50μm-100μm; The second liquid-conducting layer (30) has a pore density of 200 pores / -500 pieces / ; The liquid conduction rate of the second liquid-conducting layer (30) is 3μL / s-5μL / s.

13. The heating element as described in any one of claims 1-7, characterized in that, The main heating layer (40) must satisfy at least one of the following conditions: The main heating layer (40) is a stamped or etched metal mesh; The thickness of the main heating layer (40) ranges from 0.04 mm to 0.08 mm; The operating temperature of the main heating layer (40) is configured to be 180℃-220℃.

14. The heating element as described in any one of claims 1-7, characterized in that, The thickness of the heating core (100) ranges from 1.2mm to 3mm.

15. An aerosol generator, characterized in that, It includes the heating element (100) according to any one of claims 1-14.

16. An aerosol generating device, characterized in that, It includes a battery assembly and the aerosol generator of claim 15, wherein the battery assembly is connected to the aerosol generator.

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