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US20250160412A1 - Atomization core and electronic atomization device - Google Patents

Atomization core and electronic atomization device Download PDF

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Publication number
US20250160412A1
US20250160412A1 US19/027,323 US202519027323A US2025160412A1 US 20250160412 A1 US20250160412 A1 US 20250160412A1 US 202519027323 A US202519027323 A US 202519027323A US 2025160412 A1 US2025160412 A1 US 2025160412A1
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US
United States
Prior art keywords
porous
liquid guide
guide layer
porous substrate
heating member
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Pending
Application number
US19/027,323
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English (en)
Inventor
Zhao Zhang
Junjie Tang
Ting Wang
Yanyan Yang
Hongliang Luo
Congwen XIAO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Smoore Technology Ltd
Original Assignee
Shenzhen Smoore Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to SHENZHEN SMOORE TECHNOLOGY LIMITED reassignment SHENZHEN SMOORE TECHNOLOGY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LUO, HONGLIANG, TANG, JUNJIE, WANG, TING, XIAO, Congwen, YANG, YANYAN, ZHANG, ZHAO
Publication of US20250160412A1 publication Critical patent/US20250160412A1/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/44—Wicks
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/10—Devices using liquid inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F47/00—Smokers' requisites not otherwise provided for

Definitions

  • This disclosure relates to the field of atomization technologies, and in particular, to an atomization core and an electronic atomization device.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 12 is a top view of a physical diagram of the atomization core shown in FIG. 11 .
  • the present invention provides an atomization core and an electronic atomization device.
  • the present invention provides an atomization core, including:
  • 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
  • the porous liquid guide layer covers the side surface
  • 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.
  • 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.
  • 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.
  • 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.
  • the preset path includes a straight line segment and a curved line segment that are continuous.
  • 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.
  • the porosity of the porous liquid guide layer is about 40% to about 80%, and the average pore size is about 14 ⁇ m to about 26 ⁇ m.
  • the porosity of the porous substrate is about 30% to about 75%, and the average pore size is about 10.5 ⁇ m to about 19.5 ⁇ m.
  • the porous substrate is made of the raw material of the porous substrate through sintering
  • the porous liquid guide layer is made of the raw material of the liquid guide layer through sintering
  • the porous substrate is made of the raw material of the porous substrate through sintering
  • the porous liquid guide layer is made of the raw material of the liquid guide layer through sintering
  • 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 including the foregoing atomization core.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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 .
  • the aerosol-generating substrate 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 .
  • 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.
  • 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 .
  • a proportion of a high-temperature region can be increased, so that more regions satisfy a temperature requirement of the atomization.
  • 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.
  • 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 B 1 intersecting with and connected to the bottom surface. Generally, the heating member 31 is provided with two opposite side surfaces B 1 along a first direction intersecting with the preset path. In addition, the heating member 31 further includes a top surface B 2 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 B 1 , and the top surface B 2 may be flat surfaces, curved surfaces, a combination of the two, or the like.
  • 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.
  • 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.
  • the first direction corresponds to a width direction of the heating member 31
  • the two side surfaces B 1 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 B 2 is the top surface located up
  • the first surface A, one side surface B 1 , the top surface B 2 , and the other side surface B 1 are sequentially connected around.
  • the porous liquid guide layer 50 covers the side surface B 1 .
  • 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 B 1 of the heating member 31 that the porous liquid guide layer 50 covers.
  • the aerosol-generating substrate may further extend outward along the side surface B 1 of the heating member 31 based on that the side surface B 1 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.
  • porous liquid guide layer 50 covers both the side surface B 1 and the top surface B 2 .
  • That the porous liquid guide layer 50 covers the top surface B 2 may be that the porous liquid guide layer 50 covers only a part of a region of the top surface B 2 along the width direction is covered. In other words, along the width direction, a part of the top surface B 2 is covered, and a part of the top surface B 2 is exposed (as shown in FIG. 3 to FIG. 7 ). In this way, the porous liquid guide layer 50 covers the top surface B 2 , so that a range of direct infiltration can be widened and an infiltration effect can be enhanced.
  • the aerosol-generating substrate After the aerosol-generating substrate is guided through the porous liquid guide layer 50 to reach the top surface B 2 that is farthest from the surface of the porous substrate 10 , difficulty of infiltrating the entire top surface B 2 is greatly reduced, and a part of the exposed top surface B 2 is remained.
  • the aerosol-generating substrate can more easily and completely infiltrate the exposed part of the top surface B 2 under the surface tension, gravity, or the like, to form a liquid film, so that the atomization effect is enhanced.
  • 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.
  • the porous liquid guide layer 50 covers the top surface B 2 may be that the porous liquid guide layer 50 completely cover the top surface B 2 along the width direction.
  • 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.
  • 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 .
  • the porous liquid guide layer 50 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.
  • one end of the porous liquid guide layer 50 is connected to the porous substrate 10 , and another end continuously covers the side surface B 1 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 B 1 on one side of the heating member 31 along the preset path of the heating member 31 , and a direct infiltration effect is generated.
  • 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 B 1 located at one side along the preset path of the heating member 31
  • the second portion 53 continuously covers the side surface B 1 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 B 1 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.
  • 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 B 1 on one side along the preset path of the heating member 31 .
  • the second portion 53 continuously covers the side surface B 1 on the other side along the preset path of the heating member 31 .
  • the third portion 55 continuously covers the top surface B 2 along the preset path of the heating member 31 .
  • the aerosol-generating substrate may reach the first surface A, the side surface B 1 , and the top surface B 2 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
  • the aerosol-generating substrate guided by the third portion 55 comes from the first portion 51 and the second portion 53 respectively.
  • the first surface A of the heating member 31 is in contact with the porous substrate 10
  • the two side surfaces B 1 are in contact with the first portion 51 and the second portion 53 of the porous liquid guide layer 50 respectively
  • the top surface B 2 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.
  • 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.
  • 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.
  • 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.
  • the porous liquid guide layer 50 may cover the surface of the heating member 31 in a partially continuous manner and partially spaced manner.
  • the first portion 51 and the second portion 53 are continuous, and the third portion 55 is intermittent.
  • 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.
  • the porosity of the porous substrate 10 is 30% to 75%, and the average pore size is 10.5 ⁇ m to 19.5 ⁇ m.
  • the porosity of the porous liquid guide layer 50 is 40% to 80%, and the average pore size is 14 ⁇ m to 26 ⁇ m. In this way, the porous substrate 10 and the porous liquid guide layer 50 can have good liquid guide performance.
  • the porosity of the porous substrate 10 is 55%, and the average pore size is 15 ⁇ m.
  • 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 .
  • the porous substrate 10 is made of a raw material of the porous substrate through sintering
  • 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.
  • 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 .
  • 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).
  • PMMA Polymethyl Methacrylate
  • 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.
  • 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.
  • the heating member 31 is a heating film formed on the surface of the porous substrate 10 in a silk screen printing manner
  • 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.
  • 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.
  • 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 .
  • 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.
  • 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 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.
  • 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.

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US19/027,323 2022-08-05 2025-01-17 Atomization core and electronic atomization device Pending US20250160412A1 (en)

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Application Number Priority Date Filing Date Title
CN202210937165.6 2022-08-05
CN202210937165.6A CN115299648A (zh) 2022-08-05 2022-08-05 雾化芯及电子雾化装置
PCT/CN2023/102329 WO2024027365A1 (fr) 2022-08-05 2023-06-26 Noyau d'atomisation et dispositif d'atomisation électronique

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