Atomizing element and aerosol-generating device comprising same

Abstract

The utility model provides an atomizing element and an aerosol generating device comprising the atomizing element, and the atomizing element comprises a porous substrate which comprises a liquid absorbing surface and an atomizing surface which are oppositely arranged, and the porous substrate is internally provided with a plurality of first micropores which are distributed disorderly; the heating element is combined on the atomizing surface; wherein a plurality of layers of liquid guide channels which are arranged at intervals are formed in the porous base body, each layer of liquid guide channel comprises a plurality of second micropores and a plurality of third micropores which are intersected with the second micropores, the second micropores and the third micropores are orderly distributed in the porous base body and extend in a directional mode, and the second micropores penetrate through the position between the liquid absorption face and the atomization face. According to the invention, rapid liquid guide can be realized in one direction, and liquid supplement can be realized in the other direction, so that insufficient local liquid supply of the porous matrix caused by reverse pushing of the liquid matrix by gas in the atomization process is avoided; and the capability of adsorbing and maintaining the liquid matrix of the porous matrix is improved.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, and particularly to atomizing elements and aerosol generation apparatus including the atomizing elements. Background Technology

[0002] Atomizing elements are components in aerosol generating devices used to heat a liquid matrix to produce aerosols for users to inhale. Typically, atomizing elements consist of a porous substrate and a heating film. The porous substrate conducts the liquid matrix to the heating film, which heats the liquid matrix to produce aerosols. The liquid supply rate of the porous substrate is a key factor affecting the atomization efficiency of the liquid matrix.

[0003] As an example, the prior art provides a porous substrate with several through-holes, that is, several ordered oriented through-holes are formed inside the dense substrate to provide liquid flow channels. The through-holes can effectively shorten the liquid conduction path of the liquid matrix inside the dense substrate and reduce the liquid flow resistance. However, the amount of liquid matrix that can be stored inside the porous substrate with through-holes is limited. When the atomizing element consumes a large amount of liquid matrix, the problem of insufficient liquid supply is likely to occur. In particular, the aerosol generated by the atomizing element during the atomization process will push the liquid matrix in the through-holes back into the liquid storage cavity, causing local insufficient liquid supply in the porous substrate, which leads to local overheating of the heating film. Utility Model Content

[0004] To address the issue of insufficient localized liquid supply to the liquid-conducting matrix during atomization when it has through-hole micropores.

[0005] This application provides an atomizing element, comprising: a porous substrate including a liquid-absorbing surface and an atomizing surface disposed opposite to each other, wherein the porous substrate has a plurality of randomly distributed first micropores; a heating element, coupled to the atomizing surface; wherein, multiple layers of spaced liquid-guiding channels are formed in the porous substrate, each layer of the liquid-guiding channel including a plurality of second micropores and a plurality of third micropores intersecting with the second micropores, the second micropores and the third micropores being orderly distributed and directionally extended in the porous substrate, and the plurality of second micropores penetrating between the liquid-absorbing surface and the atomizing surface.

[0006] This application provides an embodiment of an atomizing element, wherein the diameter of the second micropore or the third micropore is larger than the average diameter of the first micropore.

[0007] This application provides an embodiment of an atomizing element, wherein the second micropore and the third micropore intersect substantially perpendicularly.

[0008] This application provides an embodiment of an atomizing element in which the pore diameter of the second micropore and the pore diameter of the third micropore are substantially equal in the same layer of the liquid guiding channel.

[0009] This application provides an embodiment of an atomizing element in which the spacing between a plurality of second micropores is equal in the same layer of the liquid guiding channel; and / or the spacing between a plurality of third micropores is equal.

[0010] This application provides an embodiment of an atomizing element, wherein the first micropore is connected to at least one second micropore or at least one third micropore.

[0011] This application provides an embodiment of an atomizing element, wherein the pore size of the second micropore or the third micropore is 20μm-70μm.

[0012] This application provides an embodiment of an atomizing element, wherein the distance between adjacent liquid guiding channels is 60μm-120μm.

[0013] This application provides an embodiment of an atomizing element, wherein the center distance between adjacent second micropores or adjacent third micropores in the same layer of the liquid guiding channel is 80μm-120μm.

[0014] This application provides an embodiment of an atomizing element, wherein the pore size of the first micropore is less than or equal to 30 μm.

[0015] This application provides an embodiment of an atomizing element, wherein the porosity of the liquid guiding channel is 25%-40%; and / or the porosity of the first micropore is 30%-40%.

[0016] This application provides an embodiment of an atomizing element, wherein the porosity ratio of the first micropore to the liquid guiding channel is 0.5-1.5:1.

[0017] This application provides an embodiment of an atomizing element in which the spacing between two adjacent second or third micropores in a liquid guiding channel near the center of the liquid absorption surface is smaller than the spacing between two adjacent second or third micropores in a liquid guiding channel near the edge of the liquid absorption surface.

[0018] This application provides an embodiment of an atomizing element in which the spacing between two adjacent liquid guiding channels near the center of the liquid absorption surface is smaller than the spacing between two adjacent liquid guiding channels near the edge of the liquid absorption surface.

[0019] This application provides an embodiment of an atomizing element, wherein the second micropore is a straight channel or a curved channel; and / or the third micropore is a straight channel or a curved channel.

[0020] This application provides an embodiment of an atomizing element, wherein the cross-section of the second or third micropore is circular, elliptical, or racetrack-shaped.

[0021] This application provides an embodiment of an atomizing element in which the spacing between the multiple layers of liquid guiding channels is substantially equal.

[0022] This application provides an embodiment of an atomizing element in which the second or third micropores are staggered in the liquid guiding channels of different layers.

[0023] This application provides an embodiment of an atomizing element, wherein the heating element covers a portion of the second micropores on the atomizing surface and avoids the other portion of the second micropores.

[0024] This application provides an aerosol generating device, including the aforementioned atomizing element.

[0025] The atomizing element provided in this application has orderly distributed and directionally extended second and third micropores, which can achieve rapid liquid conduction in one direction and liquid replenishment in the other direction. This avoids the gas pushing the liquid matrix in the opposite direction during atomization, thus preventing local liquid supply insufficiency in the porous matrix. In addition, the first micropore can further increase the porosity of the porous matrix and increase the ability of the porous matrix to adsorb and retain the liquid matrix. Thus, when there is a lack of liquid matrix in the local liquid conduction channel of the porous matrix, the liquid matrix adsorbed by the first micropore inside the porous matrix can permeate and replenish the liquid conduction channel, i.e., the second or third micropore, thereby alleviating the problem of local liquid supply insufficiency in the porous matrix. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of an atomizing element according to an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of an atomizing element according to an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of an atomizing element according to an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of an atomizing element according to an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of an aerosol generating apparatus according to an embodiment of this application.

[0032] In the picture:

[0033] 10. Atomizing element;

[0034] 1. Porous matrix;

[0035] 11. Liquid absorption surface;

[0036] 12. Atomized surface;

[0037] 3. First micropore;

[0038] 4. Liquid guiding channel; 41. Second micropore; 42. Third micropore;

[0039] 5. Heating element;

[0040] 100. Aerosol generating device. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] This application provides an atomizing element 10, such as Figure 1-4 As shown, the device includes a porous substrate 1 and a heating element 5. The porous substrate 1 includes a liquid-absorbing surface 11 and an atomizing surface 12 arranged opposite to each other. The porous substrate 1 has a plurality of randomly distributed first micropores 3 inside. The heating element 5 is attached to the atomizing surface 12. Multiple layers of spaced liquid-guiding channels 4 are formed within the porous substrate 1. Each layer of liquid-guiding channel 4 includes a plurality of second micropores 41 and a plurality of third micropores 42 intersecting with the second micropores 41. The second micropores 41 and third micropores 42 are orderly distributed and directionally extended within the porous substrate 1, and the plurality of second micropores 41 penetrate between the liquid-absorbing surface 11 and the atomizing surface 12.

[0046] The atomizing element 10 provided in this application has orderly distributed and directionally extended second micropores 41 and third micropores 42, which can achieve rapid liquid conduction in one direction and liquid replenishment in the other direction. This avoids the gas pushing the liquid matrix in the opposite direction during atomization, thus preventing local liquid supply insufficiency in the porous substrate 1. In addition, the first micropore 3 can further increase the porosity of the porous substrate 1 and increase the ability of the porous substrate 1 to adsorb and retain the liquid matrix. Thus, when there is a lack of liquid matrix in the liquid conduction channel 4 of the porous substrate 1, the liquid matrix adsorbed by the first micropore 3 inside the porous substrate 1 can permeate and replenish the liquid conduction channel 4, i.e., the second micropore 41 or the third micropore 42, thereby alleviating the problem of local liquid supply insufficiency in the porous substrate 1.

[0047] In one embodiment of this application, the liquid guiding channel 1 is formed by intersecting second micropores 41 and third micropores 42, and the liquid guiding channels 4 are stacked. The first micropores 3 are randomly distributed inside the porous matrix 1.

[0048] In one embodiment of this application, the pore diameter of the second micropore 41 or the third micropore 42 is larger than the average pore diameter of the first micropore 3, so that the liquid conduction capacity of the second micropore 41 or the third micropore 42 is greater than that of the first micropore 3, and the porous matrix 1 can obtain a greater liquid conduction speed.

[0049] In one embodiment of this application, the first micropore 3 is connected to at least one second micropore 41 or a third micropore 42, which increases the resistance of the gas pushing the liquid matrix in the reverse direction, thereby reducing backflow. Simultaneously, the porous substrate 1 has a larger liquid storage space, preventing the atomizing element 10 from dry-burning. In another embodiment of this application, the first micropore 3 and the second micropore 41 or the third micropore 42 are not connected, but the first micropore 3 can connect the atomizing surface 12 and the liquid absorption surface 11 of the porous substrate 1, giving the porous substrate 1 a larger liquid storage space and preventing the atomizing element 10 from dry-burning.

[0050] In one embodiment of this application, the pore size of the first micropore 3 is less than or equal to 30 μm. In another embodiment of this application, the pore size of the first micropore 3 is 5 μm, 8 μm, 10 μm, 15 μm, 18 μm, 20 μm, 25 μm, 28 μm, or 30 μm.

[0051] In one embodiment of this application, the second micropore 41 and the third micropore 42 are intersecting. In one embodiment of this application, the included angle between the second micropore 41 and the third micropore 42 is less than or equal to 90°. In one embodiment of this application, the included angle between the second micropore 41 and the third micropore 42 is substantially 90°, and the second micropore 41 and the third micropore 42 are substantially orthogonal. In one embodiment of this application, the included angle between the second micropore 41 and the third micropore 42 is less than 90°.

[0052] In one embodiment of this application, in the same layer of liquid guiding channel 4, the pore diameter of the second micropore 41 and the pore diameter of the third micropore 42 are equal, and the cross-sections of the second micropore 41 and the third micropore 42 are approximately the same, so that the liquid flow capacity of the second micropore 41 and the third micropore 42 is approximately the same.

[0053] In one embodiment of this application, the pore size of the second micropore 41 or the third micropore 42 is 20μm-70μm. In another embodiment of this application, the pore size of the second micropore 41 or the third micropore 42 is 20μm, 30μm, 40μm, 50μm, 60μm, or 70μm.

[0054] In one embodiment of this application, the pore size of the second micropore 41 is 20μm-70μm. In another embodiment of this application, the pore size of the second micropore 41 is 20μm, 30μm, 40μm, 50μm, 60μm, or 70μm.

[0055] In one embodiment of this application, the pore size of the third micropore 42 is 20μm-70μm. In another embodiment of this application, the pore size of the third micropore 42 is 20μm, 30μm, 40μm, 50μm, 60μm, or 70μm.

[0056] In one embodiment of this application, the spacing between a plurality of second micropores 41 in the same liquid guiding channel 4 is equal, so that the plurality of second micropores 41 are uniformly distributed. In one embodiment of this application, the spacing between a plurality of third micropores 42 in the same liquid guiding channel 4 is equal, so that the plurality of third micropores 42 are uniformly distributed.

[0057] In one embodiment of this application, the center-to-center distance between adjacent second micropores 41 or adjacent third micropores 42 in the same liquid guiding channel 4 is 80-120 μm. In another embodiment of this application, the center-to-center distance between adjacent second micropores 41 or adjacent third micropores 42 in the same liquid guiding channel 4 is 80 μm, 90 μm, 98 μm, 100 μm, 105 μm, 108 μm, 110 μm, or 120 μm.

[0058] In one embodiment of this application, the center-to-center distance between adjacent second micropores 41 in the same liquid guiding channel 4 is 80-120 μm. In another embodiment of this application, the center-to-center distance between adjacent second micropores 41 in the same liquid guiding channel 4 is 80 μm, 90 μm, 98 μm, 100 μm, 105 μm, 108 μm, 110 μm, or 120 μm.

[0059] In one embodiment of this application, the center-to-center distance between adjacent third micropores 42 in the same liquid-conducting channel 4 is 80-120 μm. In another embodiment of this application, the center-to-center distance between adjacent third micropores 42 in the same liquid-conducting layer 1 is 80 μm, 90 μm, 98 μm, 100 μm, 105 μm, 108 μm, 110 μm, or 120 μm.

[0060] In one embodiment of this application, the second micropores 41 or the third micropores 42 of the different layers of liquid guiding channels 4 are aligned. In another embodiment of this application, the second micropores 41 or the third micropores 42 of the different layers of liquid guiding channels 4 are staggered.

[0061] In one embodiment of this application, the spacing between the multilayer liquid guiding channels 4 is equal. In another embodiment of this application, the spacing between the multilayer liquid guiding channels 4 is not equal.

[0062] In one embodiment of this application, in the same layer of liquid guiding channels 4, the spacing between multiple second micropores 41 is substantially equal, and the spacing between multiple third micropores 42 is also substantially equal, so that the second micropores 41 or third micropores 42 in each layer of liquid guiding channels 4 are uniformly distributed. Furthermore, the spacing between multiple layers of liquid guiding channels 4 is substantially equal, so that the second micropores 41 are substantially uniformly distributed between the liquid inlet on the liquid absorption surface 11 and the liquid outlet on the atomizing surface 12, thereby ensuring that the liquid guiding velocity along the transfer path from the liquid absorption surface 11 to the atomizing surface 12 is approximately the same at all points on the porous substrate 1.

[0063] In one embodiment of this application, the spacing between two adjacent second micropores 41 or two adjacent third micropores 42 located at the center of the porous substrate 1 is small, while the spacing between two adjacent second micropores 41 or two adjacent third micropores 42 located at the edge of the porous substrate 1 is large. This results in a faster liquid conduction speed at the center of the porous substrate 1 and a slower liquid conduction speed at the edge of the porous substrate 1. This facilitates the atomizing element 10 to adapt to the concentrated heating properties at the center, resulting in a faster liquid conduction speed at the center of the atomizing element 10 and preventing dry burning at the center of the atomizing element 10.

[0064] In one embodiment of this application, the distance between adjacent liquid guiding channels 4 is 60μm-120μm. In another embodiment of this application, the distance between adjacent liquid guiding channels 4 is 60μm, 70μm, 75μm, 82μm, 90μm, 100μm, 105μm, 110μm, or 120μm.

[0065] In one embodiment of this application, the distance between adjacent liquid guiding channels 4 is equal.

[0066] In one embodiment of this application, the distance between the second micropores 41 of adjacent liquid guiding channels 4 is 60μm-120μm. In another embodiment of this application, the distance between the second micropores 41 of adjacent liquid guiding channels 4 is 60μm, 70μm, 75μm, 82μm, 90μm, 100μm, 105μm, 110μm or 120μm.

[0067] In one embodiment of this application, the distance between the third micropores 42 of adjacent liquid guiding channels 4 is 60μm-120μm. In another embodiment of this application, the distance between the third micropores 42 of adjacent liquid guiding channels 4 is 60μm, 70μm, 75μm, 82μm, 90μm, 100μm, 105μm, 110μm, or 120μm.

[0068] In one embodiment of this application, the second micropore 41 or the third micropore 42 is a straight channel, which allows for faster liquid conduction. In another embodiment of this application, the second micropore 41 or the third micropore 42 is a curved channel. The curved channel increases the resistance to the gas pushing the liquid matrix in the reverse direction, thereby reducing backflow. At the same time, the curved channel also has a larger liquid storage space, preventing the liquid matrix from completely vaporizing at the same time. If one of the second micropores 41 or the third micropore 42 is blocked, there will not be a situation where there is no liquid matrix in the porous matrix 1 for a short period of time, and the liquid matrix can be replenished from the other second micropore 41 or the third micropore 42.

[0069] In one embodiment of this application, the ordered and directionally extended second micropores 41 and third micropores 42 of the porous substrate 1 can be formed by laser processing on two adjacent surfaces of the porous substrate 1. The second micropores 41 or third micropores 42 formed by laser processing are generally through-holes, and the aperture of the second micropores 41 or third micropores 42 can be adjusted by adjusting the energy of the laser. The spacing between the second micropores 41 or third micropores 42 can be controlled by adjusting the distance between the two laser beams.

[0070] In one embodiment of this application, the ordered and directionally extended second micropores 41 and third micropores 42 of the porous matrix 1 can be formed by sintering an organic fiber mesh. In one embodiment of this application, the second micropores 41 and third micropores 42 formed by the sintered organic fiber mesh can be curved channels. In one embodiment of this application, the second micropores 41 and third micropores 42 formed by the sintered organic fiber mesh can be straight channels.

[0071] In one embodiment of this application, the method for preparing the porous substrate 1 includes: providing a ceramic slurry; coating the ceramic slurry on both sides of an organic fiber mesh to prepare a prepreg for forming the skeleton of the atomizing element; stacking multiple layers of prepreg and curing them to obtain a ceramic green body; sintering the ceramic green body and removing the organic fiber mesh to form a plurality of orderly distributed and directionally extended second micropores 41 and third micropores 42 inside the atomizing element.

[0072] In one embodiment of this application, a pore-forming agent is added to the ceramic slurry, so that a first micropore 3 is formed in the sintered porous matrix 1. The first micropore 3 can further increase the porosity of the porous matrix 1 and enhance the liquid storage capacity of the porous matrix 1.

[0073] In one embodiment of this application, during the stacking of multiple prepreg layers, the relative positions of the fibers on adjacent organic fiber webs are random, which may cause the second micropores 41 or third micropores 42 of adjacent layers to be aligned or staggered. In one embodiment of this application, the spacing between adjacent organic fiber webs determines the spacing between adjacent liquid guiding channels 4.

[0074] In one embodiment of this application, the distribution of intersecting second micropores 41 or third micropores 42 in the same layer can be determined by the arrangement of the fiber web in the organic fiber web. In one embodiment of this application, the distance between transverse fibers determines the distance between second micropores 41, and the distance between longitudinal fibers determines the distance between third micropores 42.

[0075] In one embodiment of this application, the number of mesh openings in the organic fiber web determines the distance between the second micropores 41. In one embodiment of this application, the number of mesh openings in the organic fiber web determines the distance between the third micropores 42.

[0076] In one embodiment of this application, the organic fiber web includes at least one of polyester, acrylic, nylon, cotton, polypropylene, aramid, polyethylene fiber, poly(p-phenylenebenzobisoxazole) fiber, poly(p-phenylenebenzoimidazolium) fiber, poly(p-phenylenepyridinium diimidazole) fiber, and polyimide fiber. The organic fiber web is an organic material and can possess a certain shape and strength at room temperature. However, at high temperatures, the sintered organic fiber web can evaporate into a gas, thereby allowing the ceramic green body to form intersecting channels of a certain shape after sintering.

[0077] In one embodiment of this application, the mesh size of the organic fiber mesh is 100-400 mesh. In another embodiment, the mesh size of the organic fiber mesh is 200-300 mesh. In another embodiment, after the surface of the organic fiber mesh is coated with ceramic slurry, the ceramic slurry fills the area of ​​the pores in the organic fiber mesh. The larger the mesh size of the organic fiber mesh, the larger the area occupied by the organic fiber mesh, and the smaller the area occupied by the ceramic slurry, the weaker the interlayer bonding force of the ceramic slurry. Furthermore, during the sintering stage of the ceramic green body, the organic fiber mesh will decompose and generate a large amount of gas. If the interlayer bonding force of the ceramic slurry is weak, delamination is likely to occur. In one embodiment of this application, when the mesh size of the organic fiber mesh is 100-400 mesh, a liquid-conducting matrix can be obtained by sintering; when the mesh size of the organic fiber mesh is 200-300 mesh, the liquid-conducting matrix obtained by sintering has better performance.

[0078] In one embodiment of this application, when the mesh size of the organic fiber mesh is 300 meshes, the area of ​​the organic fiber mesh accounts for about 79% and the area of ​​the pores accounts for about 21% in a certain layer of prepreg. After coating with ceramic slurry, the ceramic slurry occupies 21% of the area of ​​the prepreg.

[0079] In one embodiment of this application, when the mesh size of the organic fiber mesh is 200 meshes, the area of ​​the organic fiber mesh accounts for approximately 66% and the area of ​​the pores accounts for approximately 34% in a certain layer of prepreg. After coating with ceramic slurry, the ceramic slurry occupies 34% of the area of ​​the prepreg. Therefore, using a 200-mesh organic fiber mesh results in better interlayer bonding of the ceramic slurry compared to using a 300-mesh organic fiber mesh; however, using a 300-mesh organic fiber mesh results in a higher porosity in the porous matrix 1 compared to using a 200-mesh organic fiber mesh.

[0080] In one embodiment of this application, when the mesh size of the organic fiber mesh used is 200-300 mesh, after coating with ceramic slurry, in a certain layer of prepreg, the ceramic slurry occupies 21%-34% of the area of ​​the prepreg, and the organic fiber mesh occupies 68%-79% of the area of ​​the prepreg. After sintering the ceramic green body, the ordered and directionally extended second micropores 41 and third micropores 42 are obtained by the decomposition and volatilization of the organic fiber mesh. However, the area occupied by the second micropores 41 and third micropores 42 in a certain layer of liquid guiding channels 4 in the porous matrix 1 is affected not only by the organic fiber mesh but also by the expansion of the ceramic green body during sintering. In one embodiment of this application, the ceramic green body forms first micropores 3 and expands during sintering due to the influence of the pore-forming agent, which reduces the area occupied by the second micropores 41 and third micropores 42 in a certain layer of liquid guiding channels 4 in the porous matrix 1.

[0081] In one embodiment of this application, the sintering temperature is 1000℃-1200℃. In another embodiment of this application, the sintering temperature can be 1000℃, 1050℃, 1080℃, 1100℃, 1120℃, 1150℃, 1180℃, or 1200℃.

[0082] In one embodiment of this application, the sintering time is 1.5h-2.5h. In another embodiment of this application, the sintering time is 1.5h, 1.8h, 2.0h, 2.2h, or 2.5h.

[0083] In one embodiment of this application, the porosity of the porous substrate 1 is 50%-75%. By setting an ordered and directionally extended second micropore 41 or third micropore 42 and a disordered first micropore 41, the porosity of the porous substrate 1 of this application is greatly improved compared with the porosity of the porous substrate 1 with straight channels. This is beneficial to improving the liquid storage capacity and liquid absorption speed of the porous substrate 1, avoiding dry burning of the atomizing element 10 and improving the user experience.

[0084] In one embodiment of this application, the porosity of the liquid guiding channel 4 is 25%-40%, that is, the porosity of the second micropore 41 and the third micropore 42 is 25%-40%. In one embodiment of this application, the porosity of the liquid guiding channel 4 refers to the space occupied by all the second micropores 41 and the third micropores 42 in the multilayer liquid guiding channel 4 in the porous matrix 1. In one embodiment of this application, the porosity of the liquid guiding channel 4 should not be too large, that is, the distance between adjacent organic fiber networks should not be too small. Otherwise, the volume occupied by the ceramic slurry is too small, the interlayer bonding force of the ceramic slurry is weaker, and the porous matrix 1 is prone to delamination during sintering, thus failing to obtain a porous matrix 1 with good structural strength. Similarly, the porosity of the liquid guiding channel 4 should not be too small. When the porosity of the liquid guiding channel 4 is too small, the number of orderly distributed and directionally extended second micropores 41 or third micropores 42 is also smaller, thus resulting in a lower liquid guiding velocity of the porous matrix 1. In order to obtain a porous matrix 1 with suitable liquid conduction velocity and structural strength, the porosity of the liquid conduction channel 4 of the porous matrix 1 is more suitable when it is 25%-40%.

[0085] In one embodiment of this application, the porosity of the first micropore 3 is 25%-40%, which allows the porous matrix 1 to have a large number of first micropores 3 under a certain liquid conduction speed, thereby improving the liquid absorption and storage capacity of the porous matrix 1.

[0086] In one embodiment of this application, the porosity ratio of the first micropore 3 to the liquid guiding channel 4 is 0.5-1.5:1. In another embodiment of this application, the porosity ratio of the first micropore 3 to the liquid guiding channel 4 is 1:1. When the porosity of the first micropore 3 and the liquid guiding channel 4 is within this range, the porous matrix 1 has a faster liquid guiding speed, better structural strength, and good liquid absorption and storage capacity.

[0087] In one embodiment of this application, the cross-section of the second micropore 41 or the third micropore 42 is circular, elliptical, or racetrack-shaped. In another embodiment of this application, the cross-section of the second micropore 41 or the third micropore 42 can be controlled by controlling the power of the laser. In yet another embodiment of this application, the cross-section of the second micropore 41 or the third micropore 42 can be controlled by controlling the cross-section of the organic fiber web or the pressure during the prepreg lamination process.

[0088] In one embodiment of this application, the cross-section of the second micropore 41 is circular, elliptical, or racetrack-shaped. In one embodiment of this application, the cross-section of the third micropore 42 is circular, elliptical, or racetrack-shaped.

[0089] Example 1

[0090] A ceramic slurry was prepared by mixing diatomaceous earth ceramic powder, glass powder, epoxy resin, and PMMA. The proportions of diatomaceous earth ceramic powder (35 wt%), glass powder (15 wt%), epoxy resin (42 wt%), and PMMA (8 wt%) were as follows: diatomaceous earth ceramic powder (D50) = 10 μm, glass powder (D50) = 6 μm, and PMMA (D50) = 30 μm. The organic fiber mesh was made of polyester. The ceramic slurry was coated onto both sides of a 200-mesh organic fiber mesh, and the temperature was slowly raised to 1100℃ and maintained for 2 hours to obtain an atomizing element 10.

[0091] The center-to-center distance of the second micropores 41 in the atomizing element 10 is approximately 105 μm, and the distance between the liquid guiding channels 4 is approximately 75 μm. The center-to-center distance of the third micropores 42 in the atomizing element 10 is also approximately 105 μm, and the distance between the liquid guiding channels 4 is approximately 75 μm. The second micropores 41 in different liquid guiding channels 4 are staggered, and the third micropores 42 in different liquid guiding channels 4 are also staggered. The cross-sections of the second micropores 41 and the third micropores 42 are circular, and the pore diameters of the second micropores 41 and the third micropores 42 are approximately the same, ranging from 35 to 45 μm. The porosity of the atomizing element 10 is 60.5%, of which the porosity of the second micropores 41 and the third micropores 42 is 31%, and the porosity of the first micropore 3 is 29.5%.

[0092] Example 2

[0093] A ceramic slurry was prepared by mixing diatomaceous earth ceramic powder, SiC ceramic powder, glass powder, and cyanate ester resin. The proportions of diatomaceous earth ceramic powder (20 wt%), SiC ceramic powder (16 wt%), glass powder (14 wt%), cyanate ester resin (40 wt%), and PMMA (10 wt%) were as follows: diatomaceous earth ceramic powder (D50) = 10 μm; SiC ceramic powder (D50) = 5 μm; and glass powder (D50) = 4 μm. The fiber mesh was made of nylon. The ceramic slurry was coated onto both sides of a 200-mesh organic fiber mesh, and the temperature was slowly raised to 1100℃ and maintained for 2 hours to obtain an atomizing element 10.

[0094] The center-to-center distance of the second micropores 41 in the atomizing element 10 is approximately 115 μm, and the distance between the liquid guiding channels 4 is approximately 67 μm. The center-to-center distance of the third micropores 42 in the atomizing element 10 is also approximately 115 μm, and the distance between the liquid guiding channels 4 is approximately 67 μm. The second micropores 41 of different liquid guiding channels 4 are staggered, and the third micropores 42 of different liquid guiding channels 4 are also staggered. The cross-sections of the second micropores 41 and the third micropores 42 are elliptical, with a major axis diameter of approximately 50 μm and a minor axis diameter of approximately 35 μm. The porosity of the atomizing element 10 is 70.3%, of which the porosity of the second micropores 41 or the third micropores 42 is 35%, and the porosity of the first micropore 21 is 35.3%.

[0095] Example 3

[0096] A ceramic slurry was prepared by mixing diatomaceous earth ceramic powder, SiC ceramic powder, glass powder, and cyanate ester resin. The proportions of diatomaceous earth ceramic powder (14 wt%), SiC ceramic powder (20 wt%), glass powder (19 wt%), cyanate ester resin (40 wt%), and PMMA (7 wt%) were as follows: diatomaceous earth ceramic powder (D50) = 10 μm, SiC ceramic powder (D50) = 5 μm, and glass powder (D50) = 5 μm. The ceramic slurry was coated onto both sides of a 250-mesh organic fiber mesh, and the temperature was slowly raised to 1100℃ and maintained for 2 hours to obtain an atomizing element 10.

[0097] The center-to-center distance of the second micropores 41 in the atomizing element 10 is approximately 98 μm, and the distance between the liquid guiding channels 4 is approximately 58 μm; the center-to-center distance of the third micropores 42 is approximately 98 μm. The second micropores 41 of different liquid guiding channels 4 are staggered, and the third micropores 42 of different liquid guiding channels 4 are also staggered. The cross-sections of the second micropores 41 and the third micropores 42 are elliptical, with a major axis diameter of approximately 41 μm and a minor axis diameter of approximately 28 μm. The porosity of the atomizing element 10 is 63.9%, of which the porosity of the second micropores 41 and the third micropores 42 is 36%, and the porosity of the first micropore 3 is 27.9%.

[0098] Example 4

[0099] A ceramic slurry was prepared by mixing diatomaceous earth ceramic powder, SiC ceramic powder, glass powder, and cyanate ester resin. The proportions of diatomaceous earth ceramic powder (15 wt%), SiC ceramic powder (20 wt%), glass powder (18 wt%), cyanate ester resin (40 wt%), and PMMA (7 wt%) were as follows: diatomaceous earth ceramic powder (D50) = 8 μm, SiC ceramic powder (D50) = 5 μm, and glass powder (D50) = 4 μm. The ceramic slurry was coated onto both sides of a 300-mesh organic fiber mesh, and the temperature was slowly raised to 1100℃ and maintained for 2 hours to obtain an atomizing element 10.

[0100] The center-to-center distance of the second micropores 41 in the atomizing element 10 is approximately 82 μm, and the distance between the liquid guiding channels 4 is approximately 52 μm; the center-to-center distance of the third micropores 42 is approximately 82 μm. The second micropores 41 of different liquid guiding channels 4 are staggered, and the third micropores 42 of different liquid guiding channels 4 are also staggered. The cross-sections of the second micropores 41 and the third micropores 42 are elliptical, with a major axis diameter of approximately 35 μm and a minor axis diameter of approximately 26 μm. The porosity of the atomizing element 10 is 62.8%, of which the porosity of the second micropores 41 and the third micropores 42 is 35%, and the porosity of the first micropore 3 is 27.8%.

[0101] As can be seen from the above embodiments, a porous matrix 1 with ordered and directionally extended second micropores 41 and third micropores 42 and disordered first micropores 3 can be prepared by using organic fibers with a mesh size of 200-300 mesh. This allows for rapid liquid conduction in one direction and liquid replenishment in the other, thus avoiding insufficient local liquid supply to the porous matrix 1 caused by gas pushing the liquid matrix in the opposite direction during atomization. In addition, the first micropores 3 can further increase the porosity of the porous matrix 1.

[0102] In one embodiment of this application, the heating element 5 is disposed on the porous substrate 1 by processes such as thick film printing.

[0103] In one embodiment of this application, the heating element 5 is disposed on the porous substrate 1 by sintering. In another embodiment of this application, the sintering temperature of the heating element 5 is 1000℃-1050℃, and the sintering temperature of the ceramic is higher than that of the heating element 5. This ensures that the ceramic does not deform during the sintering of the heating element 5. For example, the sintering temperature of the ceramic is 1000℃-1200℃.

[0104] In one embodiment of this application, the heating element 5 covers a portion of the second micropores 41 on the atomizing surface 12 and avoids another portion of the second micropores 41.

[0105] In one embodiment of this application, the atomizing surface 12 is perpendicular to the plane containing the liquid guiding channel 4. In another embodiment of this application, the angle between the atomizing surface 12 and the liquid guiding channel 4 is an acute angle.

[0106] One embodiment of this application provides an atomizing element. A liquid-absorbing surface and an atomizing surface are located on two adjacent surfaces of the atomizing element. The atomizing element has a plurality of randomly distributed first micropores inside. A heating element is attached to the atomizing surface. Multiple layers of spaced liquid-guiding channels are formed within the atomizing element. Each layer of liquid-guiding channels includes a plurality of second micropores and a plurality of third micropores intersecting with the second micropores. The second and third micropores are orderly distributed and directionally extended within the atomizing element. The orderly and directionally extended second and third micropores in the atomizing element provided in this embodiment guide the liquid matrix from the liquid-absorbing surface to the adjacent atomizing surface.

[0107] This application provides an aerosol generating device 100, including the aforementioned atomizing element 10 and a battery assembly, wherein the battery assembly provides electrical energy to the atomizing element 10.

[0108] The atomizing element 10 and aerosol generating device 100 provided in this application have orderly distributed and directionally extended second micropores 41 and third micropores 42, which can achieve rapid liquid conduction in one direction and liquid replenishment in the other direction. This avoids the gas pushing the liquid matrix in the opposite direction during atomization, thus preventing local liquid supply insufficiency in the porous substrate 1. In addition, the first micropore 3 can further increase the porosity of the porous substrate 1 and increase the ability of the porous substrate 1 to adsorb and retain the liquid matrix. Thus, when there is a lack of liquid matrix in the liquid conduction channel 4 of the porous substrate 1, the liquid matrix adsorbed by the first micropore 3 inside the porous substrate 1 can permeate and replenish the liquid conduction channel 4, i.e., the second micropore 41 or the third micropore 42, thereby alleviating the problem of local liquid supply insufficiency in the porous substrate.

[0109] In one embodiment of this application, the liquid matrix may be a liquid comprising tobacco-containing substances containing volatile tobacco aroma components, or a liquid comprising non-tobacco substances. For example, the liquid matrix may include water, solvents, ethanol, plant extracts, fragrances, flavorings, or vitamin mixtures. Fragrances may include, but are not limited to, menthol, peppermint oil, spearmint oil, various fruit flavoring components, etc. Flavorings may include ingredients capable of providing the user with a variety of aromas or flavors. Vitamin mixtures may be substances containing at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but are not limited to these. Additionally, the liquid aerosol forming matrix may include aerosol forming agents such as glycerol and propylene glycol.

[0110] In one embodiment of this application, the battery assembly provides electrical power to the atomizing element 10. The DC supply voltage provided by the battery assembly is in the range of about 2.5V to about 9.0V, and the DC current provided by the battery assembly is in the range of about 2.5A to about 20A in amperes. Typically, the battery assembly is a rechargeable battery. Alternatively, the battery assembly may be another form of charge storage device, such as a capacitor. The battery assembly may require recharging and may have a capacity that allows for storing sufficient energy for one or more aspirations; for example, the battery assembly may have sufficient capacity to allow for continuous aerosol generation over a predetermined period of time. In another example, the battery assembly may have sufficient capacity to allow for the activation of the aerosol generation device 1000 a predetermined number of times.

[0111] 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. An atomizing element, characterized in that, include: A porous matrix includes a liquid absorption surface and an atomizing surface arranged opposite to each other, and the porous matrix has a plurality of disordered first micropores inside; The heating element is attached to the atomizing surface; The porous matrix contains multiple layers of spaced liquid guiding channels. Each layer of the liquid guiding channel includes several second micropores and several third micropores that intersect with the second micropores. The second micropores and the third micropores are orderly distributed and directionally extended in the porous matrix, and several second micropores penetrate between the liquid absorption surface and the atomizing surface.

2. The atomizing element according to claim 1, characterized in that, The diameter of the second or third micropore is larger than the average diameter of the first micropore.

3. The atomizing element according to claim 1, characterized in that, The second micropore and the third micropore intersect each other substantially perpendicularly.

4. The atomizing element according to claim 1, characterized in that, In the same layer of the liquid guiding channel, the pore diameter of the second micropore and the pore diameter of the third micropore are substantially equal.

5. The atomizing element according to claim 1, characterized in that, In the same layer of the liquid guiding channel, the spacing between the plurality of second micropores is equal; and / or the spacing between the plurality of third micropores is equal.

6. The atomizing element according to claim 1, characterized in that, The first micropore is connected to at least one second micropore or at least one third micropore.

7. The atomizing element according to claim 1, characterized in that, The pore size of the second or third micropore is 20μm-70μm.

8. The atomizing element according to claim 1, characterized in that, The distance between adjacent liquid guiding channels is 60μm-120μm.

9. The atomizing element according to claim 1, characterized in that, The center-to-center distance between adjacent second micropores or adjacent third micropores in the same layer of the liquid guiding channel is 80μm-120μm.

10. The atomizing element according to claim 1, characterized in that, The pore size of the first micropore is less than or equal to 30 μm.

11. The atomizing element according to claim 1, characterized in that, The porosity of the liquid guiding channel is 25%-40%; and / or the porosity of the first micropore is 30%-40%.

12. The atomizing element according to claim 1, characterized in that, The porosity ratio of the first micropore to the liquid guiding channel is 0.5-1.5:

1.

13. The atomizing element according to claim 1, characterized in that, The spacing between two adjacent second or third micropores in the liquid guiding channel near the center of the liquid absorption surface is smaller than the spacing between two adjacent second or third micropores in the liquid guiding channel near the edge of the liquid absorption surface.

14. The atomizing element according to claim 1, characterized in that, The spacing between two adjacent liquid guiding channels near the center of the liquid absorption surface is smaller than the spacing between two adjacent liquid guiding channels near the edge of the liquid absorption surface.

15. The atomizing element according to claim 1, characterized in that, The second micropore is a straight channel or a curved channel; and / or the third micropore is a straight channel or a curved channel.

16. The atomizing element according to claim 1, characterized in that, The cross-section of the second or third micropore is circular, elliptical, or racetrack-shaped.

17. The atomizing element according to claim 1, characterized in that, The spacing between the liquid guiding channels in the multilayer is basically equal.

18. The atomizing element according to claim 1, characterized in that, In the liquid guiding channels of different layers, the second or third micropores are arranged in a staggered manner.

19. The atomizing element according to claim 1, characterized in that, The heating element covers a portion of the second micropores on the atomizing surface and avoids the other portion of the second micropores.

20. An aerosol generating device, characterized in that, Includes the atomizing element as described in any one of claims 1-19.

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