WO2024027365A1

WO2024027365A1 - Atomizing core and electronic atomization device

Info

Publication number: WO2024027365A1
Application number: PCT/CN2023/102329
Authority: WO
Inventors: 张钊; 唐俊杰; 王亭; 杨燕燕; 罗洪梁; 肖从文
Original assignee: 深圳麦克韦尔科技有限公司
Priority date: 2022-08-05
Filing date: 2023-06-26
Publication date: 2024-02-08
Also published as: CN115299648A

Abstract

An atomizing core (100) and an electronic atomization device. The atomizing core (100) comprises a porous substrate (10), a heating element (31), and a porous liquid guide layer (50). The heating element (31) protrudes from the porous substrate (10). The heating element (31) has a first surface (A) and a second surface (B), the first surface (A) being in contact with the porous substrate (10), and the second surface (B) being not in contact with the porous substrate (10). The porous liquid guide layer (50) is connected to the porous substrate (10) and covers at least part of the second surface (B).

Description

Atomizer core and electronic atomization device

Related applications

This application cites Chinese Patent Application No. 202210937165.6 titled "Atomizing Core and Electronic Atomization Device" submitted on August 5, 2022, which is fully incorporated into this application by reference.

Technical field

This application relates to the field of atomization technology, and in particular to atomization cores and electronic atomization devices.

Background technique

Aerosol is a colloidal dispersion system formed by small solid or liquid particles dispersed and suspended in a gas medium. Since aerosol can be absorbed by the human body through the respiratory system, it provides users with a new alternative absorption method, such as medical treatment. Electronic atomization devices that generate aerosols from aerosol matrices such as medicinal liquids are used in different fields such as medical care to deliver aerosols that can be inhaled to users, replacing conventional product forms and absorption methods. The aerosol-generating matrix is medicinal liquids, Oils, etc.

Related Art The ceramic atomizing core of an electronic atomization device uses a solid metal heating film as the heating element and porous ceramics as the porous matrix. The aerosol generation matrix can only infiltrate the heating film from the surface of the porous ceramic next to the film, so it is difficult to fully Wet the heating film, and the matrix supply is not timely during the atomization process, dry burning occurs, resulting in the heating film burning and the mist volume attenuation.

Contents of the invention

According to various embodiments of the present application, an atomizing core and an electronic atomizing device are provided.

An atomizing core, the atomizing core includes:

porous matrix;

A heating element protrudingly disposed on the porous base. The heating element has a first side and a second side. The first side is in contact with the porous base, and the second side is not in contact with the porous base. ;as well as

The porous liquid-conducting layer is connected to the porous matrix and covers at least part of the second surface.

In one embodiment, the first surface is the bottom surface of the heating element, the second surface includes a side surface that intersects with the bottom surface, and the porous liquid-conducting layer is covered with the side surface.

In one embodiment, the second surface further includes a top surface opposite to the bottom surface, and the porous liquid-conducting layer is simultaneously covered on the side surface and the top surface.

In one embodiment, the heating element extends along a preset path and is disposed on the porous base. The hole liquid conductive layer is continuously covered on the second surface along the preset path.

In one embodiment, the heating element extends along a preset path and is disposed on the porous substrate, and the porous liquid-conducting layer is intermittently covered on the second surface along the preset path.

In one embodiment, the porous liquid-conducting layer is intermittently covered on the second surface along the preset path, and the area ratio of the porous liquid-conducting layer covering the second surface is about 20 %-about 80%.

In one embodiment, the preset path includes continuous straight line segments and curved segments.

In one embodiment, the atomization core further includes two electrodes spaced apart on the porous base, and the heating element extends along the preset path and is electrically connected between the two electrodes.

In one embodiment, the porous liquid-conducting layer has a porosity of about 40% to about 80%, and an average pore diameter of about 14 μm to about 26 μm.

In one embodiment, the porous matrix has a porosity of about 30% to about 75%, and an average pore diameter of about 10.5 μm to about 19.5 μm.

In one embodiment, the porous matrix is made by sintering the raw material of the matrix, and the porous liquid-conducting layer is made by sintering the raw material of the liquid-conducting layer, wherein:

Based on the mass percentage of each component in the liquid-conducting layer raw material, the liquid-conducting layer raw material includes about 42% to about 78% of the matrix raw material, about 7% to about 13% of the base material. Glass powder and about 21% to about 39% pore former.

Based on the mass percentage of each component in the matrix raw material, the matrix raw material includes about 35% to about 65% diatomite, about 9% to about 17% alumina, about 7% % to about 13% albite, about 3% to about 5% clay, and about 16% to about 30% PMMA.

In one embodiment, the heating element is a heating film formed on the surface of the porous substrate through silk printing.

An electronic atomization device includes the above-mentioned atomization core.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the application will become apparent from the description, drawings and claims.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present application or the traditional technology, the drawings needed to be used in the description of the embodiments or the traditional technology will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of explaining the embodiments or the technical solutions of the traditional technology. For those of ordinary skill in the art, the embodiments of the application can also be implemented without any creative effort. Additional drawings are obtained from the published drawings.

Figure 1 is a schematic structural diagram of an atomizing core in an embodiment of the present application;

Figure 2 is a schematic cross-sectional view of the atomizer core shown in Figure 1 at C-C;

Figure 3 is a schematic structural diagram of the atomizing core in the first embodiment of the present application;

Figure 4 is a schematic cross-sectional view of the atomizer core shown in Figure 3 at D-D;

Figure 5 is a schematic structural diagram of the atomizing core in the second embodiment of the present application;

Figure 6 is a schematic cross-sectional view of the atomizer core shown in Figure 5 at E-E;

Figure 7 is a top view of the actual atomization core shown in Figure 5;

Figure 8 is a schematic structural diagram of the atomizing core in the third embodiment of the present application;

Figure 9 is a schematic cross-sectional view of the atomizer core shown in Figure 8 at F-F;

Figure 10 is a top view of the actual atomization core shown in Figure 8;

Figure 11 is a schematic structural diagram of the atomizing core in the fourth embodiment of the present application;

Figure 12 is a top view of the actual atomization core shown in Figure 11.

The reference numbers in the specific implementation are as follows:
100. Atomizing core; 10. Porous matrix; 31. Heating element; 311. Straight section; 313. Curved section; 33. Electrode;
50. Porous liquid-conducting layer; 51. The first part; 53. The second part; 55. The third part; A, the first side; B, the second side; B1, the side surface; B2, the top surface.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis" The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply the device or device referred to. Elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations on the application.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. From this, it can be understood that the characteristics of “first” and “second” are limited to include at least one of these features explicitly or implicitly. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In this application, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified restrictions. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Referring to Figures 1 and 2, one embodiment of the present application provides an atomization core 100, which includes a porous base 10, a heating element 31 and a porous liquid conductive layer 50. The heating element 31 is protrudingly disposed on the porous base 10 . The heating element 31 has a first surface A that is in contact with the porous base 10 and a second surface B that is not in contact with the porous base 10 . The porous liquid-conducting layer 50 is connected to the porous substrate 10 and covers at least part of the second surface B.

The porous base 10 is made of porous materials such as porous ceramics, and the porous liquid-conducting layer 50 is made of the same or different porous material as the porous base 10 . The porous matrix 10 is used to guide the substrate to be atomized. The porous liquid-conducting layer 50 is connected to the porous matrix 10 . The substrate to be atomized can flow into the porous liquid-conducting layer 50 through the porous matrix 10 . The substrate to be atomized forms an aerosol that can be inhaled by the user under the heating condition of the heating element 31 . The heating element 31 is protrudingly arranged on the porous base 10, which can reduce the thickness of the substrate to be atomized on the surface of the heating element 31 when the user does not smoke for a long time, and can effectively reduce the explosive liquid, especially when the user first smokes. Probability. It is defined that the heating element 31 is located above the porous substrate 10 in the up and down direction (corresponding to the direction perpendicular to the paper surface in Figure 5). Its first surface A is the surface in direct contact with the porous matrix 10, and its second surface B is in direct contact with the porous matrix 10. The base body 10 has no direct contact relationship. As mentioned in the background art, in the prior art, the substrate to be atomized can only infiltrate the heating element 31 from top to bottom from the surface of the porous substrate 10, and it is difficult to fully infiltrate the protruding heating element 31.

In the atomizing core 100 in this application, in addition to wetting the heating element 31 through the surface of the porous base 10 , the substrate to be atomized can also be further guided to the second surface of the heating element 31 through the porous liquid-conducting layer 50 connected to the porous base 10 B, to achieve the purpose of infiltration. In this way, the infiltration direction of the substrate to be atomized on the heating element 31 can be increased to achieve more complete infiltration of the heating element 31, improve the atomization effect of the atomization core 100, reduce the probability of dry burning of the heating element 31, and improve atomization. Core 100 life. Especially when the matrix to be atomized contains plant components, more sufficient infiltration can effectively prevent the heating element 31 from dry burning, thus avoiding scaling and burnt smell. In addition, the porous liquid-conducting layer 50 covering the surface of the heating element 31 can also help reduce the heat concentration of the atomizing core 100 and improve the uniformity of the temperature. On the one hand, it can prevent the temperature in individual areas from being too high and affecting the atomization quality and mist. The life of the core 100, on the other hand, after uniform heat, can increase the proportion of high-temperature areas, so that more areas can meet the temperature requirements of atomization. Compared with the existing technology, the mist volume and service life of the atomizing core 100 in this application are significantly improved. During the suction process, attenuation (2.5 mg ≤ mist volume < 4 mg) and no mist occur (mist volume < 2.5 mg) occur. The probability is significantly reduced.

Further, the heating element 31 extends along a preset path and is disposed on the porous substrate 10. The first surface A is the bottom surface of the heating element 31, and the second surface B includes the side B1 that intersects with the bottom surface. Generally speaking, the heating element 31 is There are two opposite sides B1 in the first direction intersecting the preset path. In addition, the heating element 31 also includes a top surface B2 opposite to the first surface A.

The preset extension path of the heating element 31 can be a straight line, a curve, or a combination of both. The first surface A, the side B1, and the top surface B2 can be a flat surface, a curved surface, or a combination of the two. In this specific embodiment, the preset path of the heating element 31 is a combination of straight lines and curves, including connected straight line segments and curved segments. Therefore, the heating element 31 includes a straight section 311 extending along a straight section and a curved section 313 extending along a curved section. It can be understood that the number of straight line segments and curved segments can be set as required, and is not specifically limited here. Through the combination of the straight section 311 and the curved section 313, a heating element 31 with a longer geometric length can be arranged on the surface of the porous substrate 10 of the same size, which can also avoid excessive concentration of heat caused by too many curved parts. At the same time, it can also effectively increase the The area of the second side B.

At this time, the first direction corresponds to the width direction of each place of the heating element 31 , the two side surfaces B1 are the two side surfaces located in the width direction of the heating element 31 , and the first surface A is the bottom surface of the heating element 31 that is located downward in the up and down direction. , the top surface B2 is the top surface located above, and the first surface A, one of the side surfaces B1, the top surface B2 and the other side surface B1 are connected in sequence.

In some embodiments, the porous liquid-conducting layer 50 covers the side B1.

The porous liquid-conducting layer 50 is connected to the surface of the porous matrix 10 located next to the heating element 31, and guides the substrate to be atomized to the side B1 of the heating element 31 covered by it. In addition, the substrate to be heated can also directly infiltrate the side B1 and further extend outward along the side B1 of the heating element 31 to infiltrate other surfaces under the action of surface tension and other forces, making it easier to fully infiltrate the entire heating element 31 .

Further, the porous liquid-conducting layer 50 is simultaneously covered on the side surface B1 and the top surface B2.

The porous liquid-conducting layer 50 covering the top surface B2 may only cover a partial area of the top surface B2 in the width direction. In other words, in the width direction, part of the top surface B2 is covered and part of the top surface B2 is exposed (as shown in Figure 3- shown in 7). In this way, on the one hand, the porous liquid-conducting layer 50 covering the top surface B2 can broaden the range of direct infiltration and enhance the infiltration effect. After the substrate to be heated is guided through the porous liquid-conducting layer 50 to the top surface B2 farthest from the surface of the porous substrate 10, the difficulty of infiltrating the entire top surface B2 is greatly reduced. At the same time, a part of the top surface B2 is left exposed, and the substrate to be heated can It is easier to completely infiltrate the top surface B2 of the exposed part to form a liquid film under the action of surface tension, gravity, etc., thereby enhancing the atomization effect. On the other hand, when the porous liquid-conducting layer 50 covers the top surface B2, it can form a compressive stress effect on the heating element 31, improve its bonding force with the porous matrix 10, and reduce the probability of falling off.

The porous liquid-conducting layer 50 can cover the top surface B2 or completely cover the top surface B2 in the width direction. At this time, the heating element 31 is completely covered by the porous liquid-conducting layer in the covered area, and the infiltration effect is very sufficient, and the heating element 31 is pressed The stress effect is significantly improved, and the bonding force between the heating element 31 and the porous matrix 10 can be more effectively improved.

Furthermore, the porous liquid-conducting layer 50 is continuously or intermittently covered on the surface of the heating element 31 along the preset path of the heating element 31 .

When the porous liquid-conducting layer 50 is intermittently covered on the heating element 31, the porous liquid-conducting layer 50 can be regarded as multiple sections, and the multi-section porous liquid-conducting layers 50 are spaced apart from each other (as shown in FIG. 11). It can be understood that the porous liquid-conducting layer 50 can also cover the second surface B in a manner that is discontinuous in some areas and continuous in some areas.

Please refer to FIGS. 3 and 4 again. In the first embodiment, one end of the porous liquid-conducting layer 50 is connected to the porous substrate 10 , and the other end is continuously covered on one side of the heating element 31 along the preset path of the heating element 31 . On side B1.

The porous liquid-conducting layer 50 completely covers the side B1 of one side of the heating element 31 along the preset path of the heating element 31, and produces a direct wetting effect.

Please refer to FIGS. 5 to 7 again. In the second embodiment, the porous liquid-conducting layer 50 includes a first part 51 and a second part 53 that are both connected to the porous substrate 10 . The first part 51 and the second part 53 are respectively provided on The heating element 31 is on opposite sides in the first direction, and the first part 51 is continuously covered on the side B1 on one side along the preset path of the heating element 31 , and the second part 53 is continuous along the preset path of the heating element 31 The ground is covered on the other side B1.

The porous liquid-conducting layer 50 completely covers the side surfaces B1 on both sides of the heating element 31 along the preset path of the heating element 31 through the first part 51 and the second part 53 and produces a direct wetting effect.

Please refer to FIGS. 8 to 10 . In the third embodiment, the porous liquid-conducting layer 50 includes a first part 51 and a second part 53 both connected to the porous substrate 10 and connected to the first part 51 and the second part 53 The third part 55 , the first part 51 and the second part 53 are respectively disposed on opposite sides of the heating element 31 in the first direction, and the first part 51 is continuously covered along the preset path of the heating element 31 on a On the side B1 of the side, the second part 53 is along the heating element The preset path of the heating element 31 is continuously covered on the other side B1, and the third part 55 is continuously covered on the top surface B2 along the preset path of the heating element 31.

The substrate to be atomized can reach the first surface A, side B1 and top surface B2 of the heating element 31 through the porous base 10, the first part 51, the second part 53 and the third part 55 respectively. Among them, the substrate to be atomized guided by the first part 51 and the second part 53 comes directly from the porous matrix 10, and the substrate to be atomized guided by the third part 55 comes from the first part 51 and the second part 53 respectively. In this way, on the one hand, the first surface A of the heating element 31 is in contact with the porous substrate 10, the two side surfaces B1 are in contact with the first part 51 and the second part 53 of the porous liquid conductive layer 50 respectively, and the top surface B2 is in contact with the third part 55. , are directly infiltrated by the porous matrix 10 , the first part 51 , the second part 53 and the third part 55 respectively, and the infiltration effect is sufficient, which can effectively avoid the problem of dry burning of the heating element 31 . On the other hand, the porous liquid-conducting layer 50 completely covering the heating element 31 can also create a compressive stress effect on the heating element 31 and improve its bonding force with the porous matrix 10 .

The first part 51 , the second part 53 and the third part 55 may be made of the same material and may be made of different materials.

Please refer to Figures 11 and 12. In the fourth embodiment, the porous liquid-conducting layer 50 includes five sections. Each section of the porous liquid-conducting layer 50 includes a first part 51, a second part 53, and a third part 55. The five porous sections The liquid-conducting layer 50 is intermittently covered on the second surface B of the heating element 31 along the preset path of the heating element 31 . The porous liquid-conducting layer 50 does not completely cover the surface of the heating element 31 in the form of discontinuities, and the atomized substrate infiltrates the surface of the heating element 31 at the discontinuities under the action of surface tension and other forces. In this way, the impact of the porous liquid-conducting layer 50 on the amount of mist can be balanced on the premise that the liquid-conducting capacity of the porous liquid-conducting layer 50 is enhanced and the wetting effect is improved. It can be understood that the number of segments of the porous liquid-conducting layer 50 and the length of each segment can be set according to the size of the heating element 31, the requirements for the amount of mist, and other conditions, and are not specifically limited here.

In some other embodiments, the porous liquid-conducting layer 50 can also be partially continuous and partially spaced to cover the surface of the heating element 31 , for example: the first part 51 and the second part 53 are continuous, the third part 55 is discontinuous, and so on.

In some embodiments, the atomization core 100 further includes two electrodes 33 spaced apart on the porous base 10 , and the heating element 31 extends along a preset path and is electrically connected between the two electrodes 33 .

The heating element 31 is an electrothermal material, and generates heat through the electrode 33 under the condition of electricity to heat and atomize the substrate to be atomized.

In some embodiments, the porous matrix 10 has a porosity of 30%-75% and an average pore diameter of 10.5 μm-19.5 μm. The porous liquid-conducting layer 50 has a porosity of 40%-80% and an average pore diameter of 14 μm-26 μm. In this way, the porous matrix 10 and the porous liquid conductive layer 50 can have good liquid conductive properties.

In this specific embodiment, the porosity of the porous matrix 10 is 55%, and the average pore diameter is 15 μm. The porous liquid-conducting layer 50 has a porosity of 60% and an average pore diameter of 20 μm. It can be understood that the porosity of the porous liquid-conducting layer 50, especially the porosity of the third part 55, should be based on the air permeability needs and liquid-conducting needs, combined with the physical properties of the substrate to be atomized, etc. Taking all factors into consideration, no specific restrictions are made here. In some other embodiments, the porosity of the porous matrix 10 can also be set to specific values such as 30%, 35%, 40%, 45%, 50%, 60%, 70%, 75%, etc. The porosity of the porous liquid-conducting layer 50 can also be set to specific values such as 40%, 45%, 50%, 55%, 70%, 75%, 80%, etc. In a specific implementation, the porosity of the porous liquid-conducting layer 50 only needs to be greater than the porosity of the porous matrix 10 . In the same way, the average pore diameter can also be specifically set according to needs. In a specific implementation, the average pore diameter of the porous liquid-conducting layer 50 can be larger than the average pore diameter of the porous matrix 10 .

In some embodiments, the porous matrix 10 is made by sintering the raw material of the matrix, and the porous liquid-conducting layer 10 is made by sintering the raw material of the liquid-conducting layer. Based on the mass percentage of each component in the raw material of the liquid-conducting layer, The liquid conductive layer raw materials include 42%-78% matrix raw materials, 7%-13% glass powder and 21%-39% pore-forming agent.

The porous liquid-conducting layer 10 is made of the raw material of the porous matrix 10 as the main component, so that the two have good compatibility, the properties of the two are similar, and it is also convenient for the two to form a stable connection relationship. In addition, adding a pore-forming agent to the raw material of the liquid conducting layer of the porous liquid conducting layer 10 on the basis of the raw material of the porous matrix 10 helps to increase the liquid conducting and air permeability properties. The above ingredients must be mixed and granulated, crushed and then sieved to obtain liquid conductive layer raw materials that can be used to manufacture the porous liquid conductive layer 50 .

Further, based on the mass percentage of each component in the matrix raw material, the matrix raw material includes 35%-65% diatomite, 9%-17% alumina, and 7%-13% sodium. Feldspar, 3%-5% clay and 16%-30% PMMA (Polymethyl Methacrylate).

Among them, aluminum oxide helps improve thermal conductivity. Albite can improve the drying performance of the green body and shorten the drying time.

In this specific embodiment, based on the mass percentage of each component in the matrix raw material, the matrix raw material includes 50% diatomite, 13% alumina, 10% albite, 4% of clay and 23% PMMA. Based on the mass percentage of each component in the raw material of the liquid conducting layer, the raw material of the liquid conducting layer includes 60% of the matrix raw material, 10% of the glass powder and 30% of the pore-forming agent.

In some embodiments, the heating element 31 is a heating film formed on the surface of the porous substrate 10 through silk screen printing, and the porous liquid conductive layer 50 can be realized to be consistent with the porous substrate 10 through "silk screen printing slurry", "positioning dispensing", etc. The porous structure can also be other porous materials with good liquid conductivity, such as silicon carbide, silicon nitride and other composite materials. The porous liquid-conducting layer 50 needs to meet the condition that the sintering temperature is not higher than the porous matrix 10, and can be combined with the porous matrix 10 or through an intermediate state (such as a glass state). The porous liquid-conducting layer 50 is different from the porous matrix 10 in at least one material composition and porosity. The liquid-conducting capacity of the porous liquid-conducting layer 50 is higher than that of the porous matrix 10 , which helps to improve the liquid supply capacity.

In this specific embodiment, the porous liquid-conducting layer 50 is formed by secondary screen printing. The preparation method includes the following steps: screen-printing the heating film; drying; screen-printing the porous liquid-conducting layer 50; drying; and sintering. The porous matrix 10 is made of ceramic material whose main component is silicon oxide. The porous liquid-conducting layer 50 increases the proportion of pore-forming agent based on the material of the porous matrix 10 to improve To increase its liquid conductivity, it can also be additionally doped with high thermal conductivity materials such as aluminum oxide and aluminum nitride to improve the thermal conductivity of the porous liquid conduction layer 50, enhance the atomization performance, and reduce the risk of local high temperature. It is understood that the same purpose can also be achieved by doping other highly thermally conductive materials, which is not specifically limited here.

This application also provides an electronic atomization device, including the above-mentioned atomization core 100. Specifically, the electronic atomization device also includes a liquid storage chamber for storing the substrate to be atomized. The surface of the atomization core 100 in which the porous matrix 10 contacts the heating element 31 is the atomization surface. In addition, the porous matrix 10 also includes a liquid absorbing surface that contacts the substrate to be atomized in the liquid storage chamber. The porous substrate 10 guides the substrate to be atomized from the liquid suction surface to the atomization surface, part of the substrate to be atomized directly infiltrates the heating element 31, and part of the substrate to be atomized further directly infiltrates the heating element 31 under the guidance of the porous liquid conductive layer 50, And on the basis of direct infiltration, it spreads to other surface areas of the heating element 31, and finally forms an aerosol that can be inhaled by the user under the heating of the heating element 31.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

An atomizing core, the atomizing core includes:

porous matrix;

A heating element protrudingly disposed on the porous base. The heating element has a first side and a second side. The first side is in contact with the porous base, and the second side is not in contact with the porous base. ;as well as

The porous liquid-conducting layer is connected to the porous matrix and covers at least part of the second surface.
The atomization core according to claim 1, wherein the first surface is the bottom surface of the heating element, the second surface includes a side surface that intersects with the bottom surface, and the porous liquid-conducting layer is covered with the side.
The atomization core according to claim 2, wherein the second surface further includes a top surface opposite to the bottom surface, and the porous liquid-conducting layer covers both the side surface and the top surface.
The atomization core according to any one of claims 1 to 3, wherein the heating element extends along a preset path and is disposed on the porous base, and the porous liquid-conducting layer continuously covers the porous base along the preset path. located on the second side.
The atomization core according to any one of claims 1 to 3, wherein the heating element extends along a preset path and is disposed on the porous base, and the porous liquid-conducting layer is intermittently covered along the preset path. located on the second side.
The atomization core according to claim 4 or 5, wherein the porous liquid-conducting layer is intermittently covered on the second surface along the preset path, and the porous liquid-conducting layer covers the second surface. The surface area ratio is about 20% to about 80%.
The atomization core according to any one of claims 4 to 6, wherein the preset path includes continuous straight line segments and curved segments.
The atomization core according to any one of claims 4 to 7, wherein the atomization core further includes two electrodes spaced apart on the porous base, and the heating element extends along the preset path and electrically connected between the two electrodes.
The atomization core according to any one of claims 1 to 8, wherein the porous liquid-conducting layer has a porosity of about 40% to about 80%, and an average pore diameter of about 14 μm to about 26 μm.
The atomization core according to any one of claims 1 to 9, wherein the porous matrix has a porosity of about 30% to about 75%, and an average pore diameter of about 10.5 μm to about 19.5 μm.
The atomization core according to any one of claims 1 to 10, wherein the porous matrix is made by sintering the raw material of the matrix, and the porous liquid-conducting layer is made by sintering the raw material of the liquid-conducting layer, wherein:

Based on the mass percentage of each component in the liquid-conducting layer raw material, the liquid-conducting layer raw material includes about 42% to about 78% of the matrix raw material, about 7% to about 13% of the base material. Glass powder and about 21% to about 39% pore former.
The atomization core according to any one of claims 1 to 11, wherein the porous matrix is made by sintering the raw material of the matrix, and the porous liquid conductive layer is made by sintering the raw material of the liquid conductive layer, wherein:

Based on the mass percentage of each component in the matrix raw material, the matrix raw material includes about 35% to about 65% diatomite, about 9% to about 17% alumina, about 7% % to about 13% albite, about 3% to about 5% clay, and about 16% to about 30% PMMA.
The atomization core according to any one of claims 1 to 12, wherein the heating element is a heating film formed on the surface of the porous base through silk printing.
An electronic atomization device, including the atomization core according to any one of the above claims 1-13.