US20250160412A1

US20250160412A1 - Atomization core and electronic atomization device

Info

Publication number: US20250160412A1
Application number: US19/027,323
Authority: US
Inventors: Zhao Zhang; Junjie Tang; Ting Wang; Yanyan Yang; Hongliang Luo; Congwen XIAO
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2022-08-05
Filing date: 2025-01-17
Publication date: 2025-05-22
Also published as: CN115299648A; WO2024027365A1

Abstract

An atomization core includes: a porous substrate; a heating member protruding from the porous substrate, the heating member having a first surface and a second surface, the first surface being in contact with the porous substrate, and the second surface not being in contact with the porous substrate; and a porous liquid guide layer connected to the porous substrate and covering at least part of the second surface.

Description

CROSS-REFERENCE TO PRIOR APPLICATION

This application is a continuation of International Patent Application No. PCT/CN2023/102329, filed on Jun. 26, 2023, which claims priority to Chinese Patent Application No. 202210937165.6, filed on Aug. 5, 2022. The entire disclosure of both applications is hereby incorporated by reference herein.

FIELD

This disclosure relates to the field of atomization technologies, and in particular, to an atomization core and an electronic atomization device.

BACKGROUND

An aerosol is a colloidal dispersion system formed by small solid or liquid particles dispersed and suspended in a gas medium. Because the aerosol may be absorbed by a human body through a respiratory system, a new alternative absorption manner is provided for a user. For example, an electronic atomization device that heats an aerosol-generating substrate such as medical liquid to generate the aerosol may be used in different fields such as medical treatment to deliver an inhalable aerosol to the user, to replace a conventional product form and absorption manner. The aerosol-generating substrate is the medical liquid, oil, or the like.
In the related art, because a ceramic atomization core of an electronic atomization device uses a solid metal heating film as a heating member and a porous ceramic as a porous substrate, the aerosol-generating substrate can infiltrate the heating film only from the surface of the porous ceramic next to the film. Therefore, it is difficult to fully infiltrate the heating film, and when the porous substrate is not supplied in time during atomization, dry heating occurs, causing the heating film to burn off and an amount of vapor to decrease.

SUMMARY

In an embodiment, the present invention provides an atomization core, comprising: a porous substrate; a heating member protruding from the porous substrate, the heating member having a first surface and a second surface, the first surface being in contact with the porous substrate, and the second surface not being in contact with the porous substrate; and a porous liquid guide layer connected to the porous substrate and covering at least part of the second surface.

BRIEF DESCRIPTION OF THE DRAWINGS

Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following:

FIG. 1 is a schematic structural diagram of an atomization core according to an embodiment of this disclosure;

FIG. 2 is a schematic cross-sectional view of the atomization core shown in FIG. 1 along C-C;

FIG. 3 is a schematic structural diagram of an atomization core according to an embodiment 1 of this disclosure;

FIG. 4 is a schematic cross-sectional view of the atomization core shown in FIG. 3 at D-D;

FIG. 5 is a schematic structural diagram of an atomization core according to an embodiment 2 of this disclosure;

FIG. 6 is a schematic cross-sectional view of the atomization core shown in FIG. 5 at E-E;

FIG. 7 is a top view of a physical diagram of the atomization core shown in FIG. 5 ;

FIG. 8 is a schematic structural diagram of an atomization core according to an embodiment 3 of this disclosure;

FIG. 9 is a schematic cross-sectional view of the atomization core shown in FIG. 8 at F-F;

FIG. 10 is a top view of a physical diagram of the atomization core shown in FIG. 8 ;

FIG. 11 is a schematic structural diagram of an atomization core according to an embodiment 4 of this disclosure; and

FIG. 12 is a top view of a physical diagram of the atomization core shown in FIG. 11 .

DETAILED DESCRIPTION

In an embodiment, the present invention provides an atomization core and an electronic atomization device.
In an embodiment, the present invention provides an atomization core, including:

- a porous substrate;
- a heating member, protruding from the porous substrate, where the heating member is provided with a first surface and a second surface, the first surface is in contact with the porous substrate, and the second surface is not in contact with the porous substrate; and
- a porous liquid guide layer, connected to the porous substrate, and covering at least part of the second surface.

In one embodiment, the first surface is the bottom surface of the heating member, the second surface includes the side surface intersecting with and connected to the bottom surface, and the porous liquid guide layer covers the side surface.
In one embodiment, the second surface further includes the top surface opposite to the bottom surface, and the porous liquid guide layer covers both the side surface and the top surface.
In one embodiment, the heating member extends along a preset path and is arranged on the porous substrate, and the porous liquid guide layer continuously covers the second surface along the preset path.
In one embodiment, the heating member extends along a preset path and is arranged on the porous substrate, and the porous liquid guide layer intermittently covers the second surface along the preset path.
In one embodiment, the porous liquid guide layer intermittently covers the second surface along the preset path, and the porous liquid guide layer covers a proportion of about 20% to about 80% of the area of the second surface.
In one embodiment, the preset path includes a straight line segment and a curved line segment that are continuous.
In one embodiment, the atomization core further includes two electrodes arranged apart on the porous substrate, and the heating member extends along the preset path and is electrically connected between the two electrodes.
In one embodiment, the porosity of the porous liquid guide layer is about 40% to about 80%, and the average pore size is about 14 μm to about 26 μm.
In one embodiment, the porosity of the porous substrate is about 30% to about 75%, and the average pore size is about 10.5 μm to about 19.5 μm.
In one embodiment, the porous substrate is made of the raw material of the porous substrate through sintering, and the porous liquid guide layer is made of the raw material of the liquid guide layer through sintering, where

- based on a mass percentage of each component in the raw material of the liquid guide layer, the raw material of the liquid guide layer includes about 42% to about 78% of the raw material of the porous substrate, about 7% to about 13% of glass powder, and about 21% to about 39% of a porous former.

In one embodiment, the porous substrate is made of the raw material of the porous substrate through sintering, and the porous liquid guide layer is made of the raw material of the liquid guide layer through sintering, where

- based on a mass percentage of each component in the raw material of the porous substrate, the raw material of the porous substrate comprises about 35% to about 65% of diatomite, about 9% to about 17% of aluminum oxide, about 7% to about 13% of albite, about 3% to about 5% of clay, and about 16% to about 30% of PMMA.

In one embodiment, the heating member is a heating film formed on the surface of the porous substrate in a silk screen printing manner.
An electronic atomization device is provided, including the foregoing atomization core.
Details of one or more embodiments of this disclosure are described in the accompanying drawings and the descriptions below. Other features, objects and advantages of this disclosure are apparent from the description, drawings and claims.

LIST OF REFERENCE NUMERALS

- 100: atomization core; 10: porous substrate; 31: heating member; 311: straight segment; 313: curved segment; 33: electrode; 50: porous liquid guide layer; 51: first portion; 53: second portion; 55: third portion; A: first surface; B: second surface; B1: side surface; B2: top surface.

The following clearly and completely describes the technical solutions in the embodiments of this disclosure with reference to the accompanying drawings in the embodiments of this disclosure. It is clear that the described embodiments are only some of the embodiments of this disclosure rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of this disclosure without creative efforts shall fall within the protection scope of this disclosure.
In the descriptions of this disclosure, it should be understood that, orientations or position relationships indicated by terms such as “central”, “vertical”, “horizontal”, “length”, “width”, “thickness”, “above”, “below”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, and “circumferential” are orientations or position relationships indicated based on the accompanying drawings, and are merely used for describing this disclosure and simplifying the description, rather than indicating or implying that the mentioned apparatus or element needs to have a particular orientation or needs to be constructed and operated in a particular orientation. Therefore, such terms should not be construed as a limiting to this disclosure.
In addition, the terms “first” and “second” are used merely for the purpose of descriptions, and should not be construed as indicating or implying relative importance or implying a quantity of indicated technical features. Therefore, features defined with “first” or “second” may explicitly or implicitly include at least one of such features. In the descriptions of this disclosure, unless otherwise explicitly defined, “a plurality of” means at least two, such as two and three.
In this disclosure, unless otherwise clearly stipulated and limited, the terms “mount”, “connect”, and “fix” should be understood in a generalized manner, for example, may be understood as a fixed connection, a detachable connection, or integration; or may be understood as a mechanical connection or an electrical connection; or may be understood as a direct connection, an indirect connection via a medium, an internal communication of two elements, or a mutual relationship between two elements. A person of ordinary skill in the art may understand specific meanings of the terms in this disclosure according to specific situations.
In this disclosure, unless otherwise explicitly specified and defined, a first feature “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact through an intermediary. In addition, that the first feature is “above”, “over”, or “on” the second feature may indicate that the first feature is directly above or obliquely above the second feature, or may merely indicate that the horizontal position of the first feature is higher than the horizontal position of the second feature. That the first feature is “below”, “under”, and “beneath” the second feature may be that the first feature is directly below or obliquely below the second feature, or may merely indicate that the horizontal position of the first feature is lower than the horizontal position of the second feature.
It should be noted that, when an element is referred to as “being fixed to” or “being arranged on” another element, the element may be directly on the another element, or there may be an intermediate element. When an element is considered to be “connected to” another element, the element may be directly connected to the another element, or there may be an intermediate element. The terms “vertical”, “horizontal”, “upper”, “lower”, “left”, “right”, and similar expressions used in this specification are merely used for an illustrative purpose, and do not indicate a unique implementation.
Referring to FIG. 1 and FIG. 2 , an embodiment of this disclosure provides an atomization core 100, including a porous substrate 10, a heating member 31, and a porous liquid guide layer 50. The heating member 31 protrudes from the porous substrate 10. The heating member 31 is provided with a first surface A in contact with the porous substrate 10 and a second surface B 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.
The porous substrate 10 is made of a porous material such as porous ceramic, and the porous liquid guide layer 50 is made of a porous material the same as or different from the porous material of the porous substrate 10. The porous substrate 10 is configured to guide the aerosol-generating substrate. The porous liquid guide layer 50 is connected to the porous substrate 10. The aerosol-generating substrate may flow into the porous liquid guide layer 50 through the porous substrate 10. The aerosol-generating substrate forms, under a heating condition of the heating member 31, an aerosol that can be inhaled by a user. The heating member 31 protrudes from the porous substrate 10, which can reduce a thickness of the aerosol-generating substrate on the surface of the heating member 31 when the user does not inhale for long time, and can effectively reduce a probability of liquid explosion, especially during initial inhalation. It is defined that the heating member 31 is located above the porous substrate 10 along an up-down direction (corresponding to a direction perpendicular to the paper surface in FIG. 5 ), the first surface A is a surface in direct contact with the porous substrate 10, and the second surface B is not in direct contact with the porous substrate 10. As described in the background, in the related art, the aerosol-generating substrate can only be exuded from the surface of the porous substrate 10 to infiltrate the heating member 31 from top to bottom, and can hardy fully infiltrate the protruding heating member 31.
In the atomization core 100 in this disclosure, in addition to infiltrating the heating member 31 through the surface of the porous substrate 10, the aerosol-generating substrate may be further guided to the second surface B of the heating member 31 through the porous liquid guide layer 50 connected to the porous substrate 10, to achieve an infiltration purpose. In this way, orientations of infiltrating the heating member 31 by the aerosol-generating substrate can be increased, to achieve more sufficient infiltration of the heating member 31, improve an atomization effect of the atomization core 100, reduce a probability of dry heating of the heating member 31, and improve a service life of the atomization core 100. Especially when the aerosol-generating substrate includes a plant-based component, more sufficient infiltration can effectively avoid dry heating of the heating member 31, to avoid fouling and a burnt smell. In addition, that the porous liquid guide layer 50 covers the surface of the heating member 31 is further beneficial to reducing heat concentration of the atomization core 100 and improving uniformity of temperature. In this way, an excessively high temperature in a specific region can be prevented from affecting atomization quality and the service life of the atomization core 100. In addition, after the heat is uniform, a proportion of a high-temperature region can be increased, so that more regions satisfy a temperature requirement of the atomization. Compared with the related art, in this disclosure, an amount of vapor and a service life of the atomization core 100 are improved, and probabilities of decreasing the amount of vapor (2.5 mg≤the amount of vapor <4 mg) and no vapor (the amount of vapor <2.5 mg) during inhalation are reduced.
Further, the heating member 31 extends along a preset path and is arranged on the porous substrate 10, the first surface A is the bottom surface of the heating member 31, and the second surface B includes a side surface B1 intersecting with and connected to the bottom surface. Generally, the heating member 31 is provided with two opposite side surfaces B1 along a first direction intersecting with the preset path. In addition, the heating member 31 further includes a top surface B2 opposite to the first surface A.
The extending preset path of the heating member 31 may be a straight line, a curved line, a combination of the two, or the like. The first surface A, the side surface B1, and the top surface B2 may be flat surfaces, curved surfaces, a combination of the two, or the like. In this specific embodiment, the preset path of the heating member 31 is the combination of the straight line and the curved line, and includes a straight line segment and a curved line segment that are connected. Therefore, the heating member 31 includes a straight segment 311 extending along the straight line segment and a curved segment 313 extending along the curved line segment. It may be understood that, a quantity of straight line segments and a quantity of curved line segments may set based on requirements, which is not specifically limited herein. Through a combination of the straight segment 311 and the curved segment 313, the heating member 31 with a longer geometric length can be arranged on the surface of the porous substrate 10 with a same size, excessive heat concentration caused by excessive bent parts can be avoided, and an area of the second surface B can be effectively increased.
In this case, the first direction corresponds to a width direction of the heating member 31, the two side surfaces B1 are two side surfaces located along the width direction of the heating member 31, the first surface A is the bottom surface of the heating member 31 located down along the up-down direction, the top surface B2 is the top surface located up, and the first surface A, one side surface B1, the top surface B2, and the other side surface B1 are sequentially connected around.
In some embodiments, the porous liquid guide layer 50 covers the side surface B1.
The porous liquid guide layer 50 is connected to the surface of the porous substrate 10 located beside the heating member 31, and guides the aerosol-generating substrate to the side surface B1 of the heating member 31 that the porous liquid guide layer 50 covers. In addition, the aerosol-generating substrate may further extend outward along the side surface B1 of the heating member 31 based on that the side surface B1 is directly infiltrated, to infiltrate another surface under a force such as surface tension, so that the entire heating member 31 is more easily and fully infiltrated.
Further, the porous liquid guide layer 50 covers both the side surface B1 and the top surface B2.
That the porous liquid guide layer 50 covers the top surface B2 may be that the porous liquid guide layer 50 covers only a part of a region of the top surface B2 along the width direction is covered. In other words, along the width direction, a part of the top surface B2 is covered, and a part of the top surface B2 is exposed (as shown in FIG. 3 to FIG. 7 ). In this way, the porous liquid guide layer 50 covers the top surface B2, so that a range of direct infiltration can be widened and an infiltration effect can be enhanced. After the aerosol-generating substrate is guided through the porous liquid guide layer 50 to reach the top surface B2 that is farthest from the surface of the porous substrate 10, difficulty of infiltrating the entire top surface B2 is greatly reduced, and a part of the exposed top surface B2 is remained. The aerosol-generating substrate can more easily and completely infiltrate the exposed part of the top surface B2 under the surface tension, gravity, or the like, to form a liquid film, so that the atomization effect is enhanced. In addition, after the porous liquid guide layer 50 covers the top surface B2, a compressive stress effect may be formed on the heating member 31, a bonding force between the heating member 31 and the porous substrate 10 is increased, and a probability of falling off is reduced.
Alternatively, that the porous liquid guide layer 50 covers the top surface B2 may be that the porous liquid guide layer 50 completely cover the top surface B2 along the width direction. In this case, the heating member 31 is completely included by the porous liquid guide layer in a covered region, the infiltration effect is sufficient, and a compressive stress effect of the heating member 31 is significantly increased, so that the bonding force between the heating member 31 and the porous substrate 10 can be more effectively improved.
Further, the porous liquid guide layer 50 continuously or intermittently covers the surface of the heating member 31 along the preset path of the heating member 31.
When the porous liquid guide layer 50 intermittently covers the heating member 31, the porous liquid guide layer 50 may be considered as a plurality of segments, and the plurality of segments of the porous liquid guide layer 50 are arranged at intervals from each other (as shown in FIG. 11 ). It may be understood that, alternatively, a part of the porous liquid guide layer 50 may intermittently cover the second surface B, and a part of the porous liquid guide layer 50 may continuously cover the second surface B.
Referring to FIG. 3 and FIG. 4 again, in a first embodiment, one end of the porous liquid guide layer 50 is connected to the porous substrate 10, and another end continuously covers the side surface B1 on one side of the heating member 31 along the preset path of the heating member 31.
The porous liquid guide layer 50 completely covers the side surface B1 on one side of the heating member 31 along the preset path of the heating member 31, and a direct infiltration effect is generated.
Referring to FIG. 5 to FIG. 7 again, in a second embodiment, the porous liquid guide layer 50 includes a first portion 51 and a second portion 53 that are both connected to the porous substrate 10. The first portion 51 and the second portion 53 are respectively arranged on two opposite sides of the heating member 31 along the first direction. The first portion 51 continuously covers the side surface B1 located at one side along the preset path of the heating member 31, and the second portion 53 continuously covers the side surface B1 located at the other side along the preset path of the heating member 31.
The porous liquid guide layer 50 completely covers the side surfaces B1 on the two sides of the heating member 31 respectively along the preset path of the heating member 31 through the first portion 51 and the second portion 53, and the direct infiltration effect is generated.
Referring to FIG. 8 to FIG. 10 , in a third embodiment, the porous liquid guide layer 50 includes the first portion 51 and the second portion 53 connected to the porous substrate 10, and the third portion 55 connected between the first portion 51 and the second portion 53. The first portion 51 and the second portion 53 are respectively arranged on the two opposite sides of the heating member 31 along the first direction. The first portion 51 continuously covers the side surface B1 on one side along the preset path of the heating member 31. The second portion 53 continuously covers the side surface B1 on the other side along the preset path of the heating member 31. The third portion 55 continuously covers the top surface B2 along the preset path of the heating member 31.
The aerosol-generating substrate may reach the first surface A, the side surface B1, and the top surface B2 of the heating member 31 respectively through the porous substrate 10, the first portion 51, the second portion 53, and the third portion 55. The aerosol-generating substrate guided by the first portion 51 and the second portion 53 directly comes from the porous substrate 10, and the aerosol-generating substrate guided by the third portion 55 comes from the first portion 51 and the second portion 53 respectively. In this way, the first surface A of the heating member 31 is in contact with the porous substrate 10, the two side surfaces B1 are in contact with the first portion 51 and the second portion 53 of the porous liquid guide layer 50 respectively, and the top surface B2 is in contact with the third portion 55 and is directly infiltrated by the porous substrate 10, the first portion 51, the second portion 53, and the third portion 55 respectively. Therefore, the infiltrating effect is sufficient, and a problem of dry heating of the heating member 31 can be effectively avoided. In addition, that the porous liquid guide layer 50 completely covers the heating member 31 may further form a compressive stress effect on the heating member 31, to improve a bonding force between the heating member 31 and the porous substrate 10.
The first portion 51, the second portion 53, and the third portion 55 may be integrally formed by a same material, or may be formed by different materials.
Referring to FIG. 11 and FIG. 12 , in a fourth embodiment, the porous liquid guide layer 50 includes five segments, each segment of the porous liquid guide layer 50 includes the first portion 51, the second portion 53, and the third portion 55, and the five segments of the porous liquid guide layer 50 intermittently cover the second surface B of the heating member 31 along the preset path of the heating member 31. The porous liquid guide layer 50 does not completely cover the surface of the heating member 31 in an intermittent manner, and the aerosol-generating substrate infiltrates the surface of the heating member 31 at an intermittent position under a force such as surface tension. In this way, impact of the porous liquid guide layer 50 on the amount of vapor may be balanced on a premise that a liquid guide capability is enhanced by the porous liquid guide layer 50 and an infiltration effect is improved. It may be understood that, a quantity of segments of the porous liquid guide layer 50 and a length size of each segment may be set based on conditions such as a size of the heating member 31 and a requirement on the amount of vapor. This is not specifically limited herein.
In some other embodiments, the porous liquid guide layer 50 may cover the surface of the heating member 31 in a partially continuous manner and partially spaced manner. For example, the first portion 51 and the second portion 53 are continuous, and the third portion 55 is intermittent.
In some embodiments, the atomization core 100 further includes two electrodes 33 arranged apart on the porous substrate 10, and the heating member 31 extends along the preset path and is electrically connected between the two electrodes 33.
The heating member 31 is made of an electric heating material, and generates heat through the electrode 33 under an energized condition, to heat and atomize the aerosol-generating substrate.
In some embodiments, the porosity of the porous substrate 10 is 30% to 75%, and the average pore size is 10.5 μm to 19.5 μm. The porosity of the porous liquid guide layer 50 is 40% to 80%, and the average pore size is 14 μm to 26 μm. In this way, the porous substrate 10 and the porous liquid guide layer 50 can have good liquid guide performance.
In this specific embodiment, the porosity of the porous substrate 10 is 55%, and the average pore size is 15 μm. The porosity of the porous liquid guide layer 50 is 60%, and the average pore size is 20 am. It may be understood that, the porosity of the porous liquid guide layer 50, and especially the porosity of the third portion 55 should be comprehensively considered based on factors such as an air permeability requirement and a liquid guide requirement in combination with physical characteristics of the aerosol-generating substrate. This is not specifically limited herein. In some other implementations, the porosity of the porous substrate 10 may alternatively be set to a specific value such as 30%, 35%, 40%, 45%, 50%, 60%, 70%, 75%, or the like. The porosity of the porous liquid guide layer 50 may alternatively be set to a specific value such as 40%, 45%, 50%, 55%, 70%, 75%, 80%, or the like. In a specific implementation, the porosity of the porous liquid guide layer 50 is greater than the porosity of the porous substrate 10. Similarly, the average pore size may also be specifically set based on requirements. In a specific implementation, the average pore size of the porous liquid guide layer 50 is greater than the average pore size of the porous substrate 10.
In some embodiments, the porous substrate 10 is made of a raw material of the porous substrate through sintering, and the porous liquid guide layer 50 is made of a raw material of a liquid guide layer through sintering. Based on a mass percentage of each component in the raw material of the liquid guide layer, the raw material of the liquid guide layer includes 42% to 78% of the raw material of the porous substrate, 7% to 13% of glass powder, and 21% to 39% of a porous former.
The porous liquid guide layer 50 is made of a raw material of the porous substrate 10 as a main component, so that the porous liquid guide layer 50 and the porous substrate 10 have good compatibility, properties of the porous liquid guide layer 50 and the porous substrate 10 are similar, and it is convenient for the porous liquid guide layer 50 and the porous substrate 10 to form a stable connection relationship. In addition, the porous former is added to the raw material of the liquid guide layer of the porous liquid guide layer 50 based on the raw material of the porous substrate 10, which is beneficial to improving liquid guide performance and air permeability performance. The foregoing components need to be granulated with mixed materials, crushed, and then screened, to obtain the raw material of the liquid guide layer that can be used to manufacture the porous liquid guide layer 50.
Further, based on a mass percentage of each component in the raw material of the porous substrate, the raw material of the porous substrate includes 35% to 65% of diatomite, 9% to 17% of aluminum oxide, 7% to 13% of albite, 3% to 5% of clay, and 16% to 30% of Polymethyl Methacrylate (PMMA).
The aluminum oxide is beneficial to improving heat conduction performance. The albite can improve dry performance of green body of the porous substrate and shorten drying time.
In this specific embodiment, based on the mass percentage of each component in the raw material of the porous substrate, the raw material of the porous substrate includes 50% of diatomite, 13% of aluminum oxide, 10% of albite, 4% of clay, and 23% of PMMA. Based on the mass percentage of each component in the raw material of the liquid guide layer, the raw material of the liquid guide layer includes 60% of the raw material of the porous substrate, 10% of glass powder, and 30% of the porous former.
In some embodiments, the heating member 31 is a heating film formed on the surface of the porous substrate 10 in a silk screen printing manner, and the porous liquid guide layer 50 may be implemented as a porous structure consistent with the porous substrate 10 in a manner of “silk screen printing paste”, “positioning adhesive”, or the like, or may be another porous material with good liquid guide performance, for example, a composite material such as silicon carbide or silicon nitride. The porous liquid guide layer 50 needs to satisfy a condition that a sintering temperature is not higher than a sintering temperature of the porous substrate 10, and may be combined with the porous substrate 10 or may be combined with the porous substrate 10 in an intermediate state (for example, a glassy state). The porous liquid guide layer 50 differs from the porous substrate 10 in at least one of the material composition and the porosity. A liquid guide capability of the porous liquid guide layer 50 is higher than a liquid guide capability of the porous substrate 10, which is beneficial to improving a liquid supply capability.
In this specific embodiment, the porous liquid guide layer 50 is formed in a secondary silk screen printing manner. A preparation method includes the following steps: silk screen printing the heating film; drying; screen printing the porous liquid guide layer 50; drying; and sintering. The porous substrate 10 is made of a ceramic material whose main component is silicon oxide. In the porous liquid guide layer 50, a proportion of the porous former is increased based on a material of the porous substrate 10, to improve the liquid guide capability of the porous liquid guide layer, and the porous liquid guide layer 50 may be additionally doped with a high heat conduction material such as aluminum oxide or aluminum nitride, to improve a heat conduction effect of the porous liquid guide layer 50, enhance atomization performance, and reduce a local high temperature risk. It may be understood that, a same purpose may be achieved by doping other high heat conduction materials. This is not specifically limited herein.
This disclosure further provides an electronic atomization device, including the foregoing atomization core 100. Specifically, the electronic atomization device further includes a liquid storage cavity configured to store an aerosol-generating substrate. The surface of the porous substrate 10 in the atomization core 100 in contact with the heating member 31 is an atomization surface. In addition, the porous substrate 10 further includes a liquid absorbing surface in contact with the aerosol-generating substrate in the liquid storage cavity. The porous substrate 10 guides the aerosol-generating substrate from the liquid absorbing surface to the atomization surface, a part of the aerosol-generating substrate directly infiltrates the heating member 31, and a part of the aerosol-generating substrate further directly infiltrates the heating member 31 under a guide of the porous liquid guide layer 50, and is spread toward another surface region of the heating member 31 based on direct infiltration, and an aerosol that can be inhaled by a user is finally formed under heating of the heating member 31.
The technical features in the foregoing embodiments can be described in any combination. For ease of description, not all possible combinations of the technical features in the foregoing embodiments are described herein. However, as long as there is no contradiction between the combinations of the technical features, all the combinations should be within the recorded scope in this specification.
While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments.
The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.

Claims

What is claimed is:

1. An atomization core, comprising:

a porous substrate;

a heating member protruding from the porous substrate, the heating member having a first surface and a second surface, the first surface being in contact with the porous substrate, and the second surface not being in contact with the porous substrate; and

a porous liquid guide layer connected to the porous substrate and covering at least part of the second surface.

2. The atomization core of claim 1, wherein the first surface comprises a bottom surface of the heating member,

wherein the second surface comprises a side surface intersecting with and connected to the bottom surface, and

wherein the porous liquid guide layer covers the side surface.

3. The atomization core of claim 2, wherein the second surface comprises a top surface opposite to bottom surface, and

wherein the porous liquid guide layer covers both the side surface and the top surface.

4. The atomization core of claim 1, wherein the heating member extends along a preset path and is arranged on the porous substrate, and

wherein the porous liquid guide layer continuously covers the second surface along the preset path.

5. The atomization core of claim 1, wherein the heating member extends along a preset path and is arranged on the porous substrate, and

wherein the porous liquid guide layer intermittently covers the second surface along the preset path.

6. The atomization core of claim 4, wherein the porous liquid guide layer intermittently covers the second surface along the preset path, and

wherein the porous liquid guide layer covers a proportion of about 20% to about 80% of an area of the second surface.

7. The atomization core of claim 4, wherein the preset path includes a straight line segment and a curved line segment that are continuous.

8. The atomization core of claim 4, further comprising:

two electrodes arranged apart on the porous substrate, and

wherein the heating member extends along the preset path and is electrically connected between the two electrodes.

9. The atomization core of claim 1, wherein a porosity of the porous liquid guide layer is about 40% to about 80%, and

wherein an average pore size of the porous liquid guide layer is about 14 μm to about 26 μm.

10. The atomization core of claim 1, wherein a porosity of the porous substrate is about 30% to about 75%, and

wherein the average pore size of the porous substrate is about 10.5 μm to about 19.5 μm.

11. The atomization core of claim 1, wherein the porous substrate comprises a raw material of the porous substrate through sintering,

wherein the porous liquid guide layer comprises a raw material of a liquid guide layer through sintering, and

wherein, based on a mass percentage of each component in the raw material of the liquid guide layer, the raw material of the liquid guide layer comprises about 42% to about 78% of the raw material of the porous substrate, about 7% to about 13% of glass powder, and about 21% to about 39% of a porous former.

12. The atomization core of claim 1, wherein the porous substrate comprises the raw material of the porous substrate through sintering, and

wherein the porous liquid guide layer comprises the raw material of the liquid guide layer through sintering, and

wherein, based on a mass percentage of each component in the raw material of the porous substrate, the raw material of the porous substrate comprises about 35% to about 65% of diatomite, about 9% to about 17% of aluminum oxide, about 7% to about 13% of albite, about 3% to about 5% of clay, and about 16% to about 30% of PMMA.

13. The atomization core of claim 1, wherein the heating member comprises a heating film formed on a surface of the porous substrate in a silk screen printing manner.

14. An electronic atomization device, comprising:

the atomization core of claim 1.