CN114451585A

CN114451585A - Atomizing core, preparation method thereof, atomizer and electronic atomizing device

Info

Publication number: CN114451585A
Application number: CN202111578855.9A
Authority: CN
Inventors: 谢宝林; 周永权; 钟祺
Original assignee: Shenzhen Xuewu Technology Co Ltd
Current assignee: Shenzhen Xuewu Technology Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-05-10

Abstract

The application provides an atomizing core, a preparation method of the atomizing core, an atomizer and an electronic atomizing device. This atomizing core includes: a porous substrate and a heating element; wherein the porous matrix has an atomizing surface; the heating body is arranged on the atomizing surface of the porous substrate and is used for heating and atomizing the aerosol generating substrate on the porous substrate when the porous substrate is electrified; wherein the ratio of the effective atomization area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4 (0.8-1.2) to (0.2-0.3). The atomizing core not only greatly improves the overall atomizing efficiency of the atomizing core, but also improves the atomizing amount of the atomizing core; and can effectively prevent the aerosol generating substrate from being burnt or generate peculiar smell, frying oil and the like, and simultaneously can not influence the cruising ability of the power supply assembly electrically connected with the atomizing core.

Description

Atomizing core, preparation method thereof, atomizer and electronic atomizing device

Technical Field

The invention relates to the technical field of electronic atomization, in particular to an atomization core, a preparation method of the atomization core, an atomizer and an electronic atomization device.

Background

At present, a film-coated porous ceramic atomizing core is widely used as a heating element in the field of closed electronic atomization to replace a traditional cotton core so as to heat and atomize an aerosol generating substrate to form aerosol.

The existing atomizing core generally adopts 6.5W constant power output, and under the output power, the atomizing amount of the atomizing core is basically between 5.5 and 6.5 mg/puff; if a larger atomization is to be achieved, only an increase in output power can be achieved. However, increasing the output power may cause the aerosol-generating substrate to burn or produce odors, frying oil, etc., and the range of the power supply connected to the atomizing wick is also reduced.

Disclosure of Invention

The application provides an atomizing core and preparation method, atomizer and electronic atomization device thereof, this atomizing core aims at solving current atomizing core and increases atomizing volume through increasing output, probably brings the aerosol and generates the matrix and be burnt, or produce phenomenons such as peculiar smell, fried oil, the duration of the power that is connected with atomizing core simultaneously also shortens the problem.

In order to solve the technical problem, the application adopts a technical scheme that: an atomizing core is provided. This atomizing core includes: a porous substrate and a heating element; wherein the porous matrix has an atomizing surface; the heating body is arranged on the atomizing surface of the porous substrate and is used for heating and atomizing the aerosol generating substrate on the porous substrate when the porous substrate is electrified; wherein the ratio of the effective atomization area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4 (0.8-1.2): (0.2-0.3).

Wherein the ratio of the effective atomization area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4:1: 0.27.

Wherein the ratio of the porosity of the porous substrate to the porosity of the heating element is 1 (0.3-0.54).

Wherein the porosity of the porous matrix is 60% -70%; and/or the porosity of the heating element is 15-35%.

Wherein the shortest distance from the heating element to the edge of the porous matrix along the width direction of the porous matrix is more than or equal to 0.5 mm.

The heating body is in a curve shape, and at least two opposite heating circuit sections are defined; and the shortest distance between every two adjacent sections of the heating circuit sections is 0.5-0.8 mm.

Wherein, the preparation raw materials of the porous matrix comprise a first solid powder and an organic solvent; the first solid powder comprises ceramic aggregate, pore-forming agent and sintering aid, and the organic solvent comprises paraffin, plastic, surface modifier and plasticizer.

Wherein the ceramic aggregate comprises at least one of natural mineral raw materials and fine ceramic raw materials; the pore-forming agent comprises at least one of but not limited to polyvinyl chloride microspheres, polymethyl methacrylate, flour, corn starch and carbon powder; the sintering aid comprises at least one of but not limited to sodium silicate, zirconium silicate, zinc oxide, glass powder and lithium carbonate; and/or the plastic includes, but is not limited to, at least one of polypropylene, polyethylene, polystyrene, polyamide; the surface modifier includes but is not limited to at least one of fatty acid, aluminate coupling agent, silane coupling agent and ethylene-propylene copolymer; the plasticizer includes but is not limited to at least one of diethyl phthalate, di-n-butyl phthalate and dioctyl phthalate.

Wherein the natural mineral raw material accounts for 30-80% of the first solid powder in percentage by weight; the fine ceramic raw material accounts for 5-50% of the first solid powder in percentage by weight; the pore-forming agent accounts for 10-40% of the first solid powder by weight; the sintering aid accounts for 5-40% of the weight of the first solid powder.

Wherein, the paraffin accounts for 10 to 80 percent of the weight of the organic solvent, the plastic accounts for 1 to 20 percent of the weight of the organic solvent, the surface modifier accounts for 1 to 10 percent of the weight of the organic solvent, and the plasticizer accounts for 0.5 to 10 percent of the weight of the organic solvent;

preferably, the paraffin accounts for 65 wt% of the organic solvent, the plastic accounts for 15 wt% of the organic solvent, the surface modifier accounts for 10 wt% of the organic solvent, and the plasticizer accounts for 10 wt% of the organic solvent.

Wherein, the preparation raw materials of the heating element comprise a second solid powder and an organic carrier; wherein the second solid powder accounts for 60-95 wt% of the raw materials for preparing the heating element; the organic carrier accounts for 5-40% of the weight of the raw materials for preparing the heating element.

The second solid powder comprises conductive metal powder, glass powder and a pore-forming agent; the organic vehicle at least comprises a solvent, a plasticizer, a thickener and a thixotropic agent.

Wherein the conductive metal powder accounts for 60-90% of the second solid powder by weight; the glass powder accounts for 5 to 25 percent of the weight of the second solid powder; the pore-forming agent accounts for 2-15% of the second solid powder by weight; and/or

The solvent accounts for 40-80% of the weight of the organic carrier, and the plasticizer accounts for 5-45% of the weight of the organic carrier; the thickening agent accounts for 5 to 15 percent of the weight of the organic carrier; the thixotropic agent accounts for 0.5 to 2 percent of the weight of the organic carrier.

In order to solve the above technical problem, another technical solution adopted by the present application is: an atomizer is provided. The atomizer includes: the atomizing core is the atomizing core as mentioned above.

In order to solve the above technical problem, the present application adopts another technical solution: an electronic atomizer is provided. The electronic atomization device comprises: an atomizer and power supply assembly; wherein the atomizer is as described above; and the power supply assembly is connected with the atomizer and used for supplying power to the atomizer.

In order to solve the above technical problem, the present application adopts another technical solution that: a method for preparing an atomizing core is provided. The preparation method comprises the following steps: preparing a pre-sintering green body; preparing a heating element prefabricated body on the atomization surface of the pre-sintering blank body; sintering the pre-sintering blank and the heating element preform to enable the pre-sintering blank to form a porous matrix, wherein the heating element preform forms a heating element; wherein the ratio of the effective atomization area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4 (0.8-1.2) to (0.2-0.3).

The step of preparing the pre-sintering green body specifically comprises the following steps: obtaining and mixing ceramic aggregate, a pore-forming agent, a sintering aid and an additive to obtain first solid powder; adding the first solid powder into an organic solvent, and stirring to obtain a mixed material; performing injection molding on the mixed material to obtain a prefabricated biscuit; and carrying out glue discharging on the prefabricated biscuit to obtain a pre-sintered blank.

The step of preparing the heating element preform on the atomization surface of the pre-sintering blank body specifically comprises the following steps: obtaining metal powder, a pore-forming agent and glass powder, and mixing to obtain second solid powder; sequentially obtaining a solvent, a plasticizer, a thickening agent and a thixotropic agent, and heating and dissolving to obtain an organic carrier; mixing the second solid powder and the organic carrier according to a preset ratio to obtain metal resistance slurry; and depositing the metal resistance slurry on the atomized surface of the porous matrix and drying.

Wherein, in the temperature rising process of sintering the pre-sintering blank and the heating element preform, the temperature rising rate is 2-15 ℃/min; the maximum sintering temperature is 700-1000 ℃, and the total sintering time is 2-48 h.

According to the atomizing core, the preparation method thereof, the atomizer and the electronic atomizing device, the atomizing core is provided with the porous substrate, and the heating body is arranged on the atomizing surface of the porous substrate, so that the aerosol generating substrate on the porous substrate is heated and atomized when electrified; wherein, the proportion of the effective atomization area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4 (0.8-1.2) to (0.2-0.3), so that the integral atomization efficiency of the atomization core is greatly improved, and the atomization amount of the atomization core is increased; compared with the scheme of increasing the atomization amount by increasing the output power, the method can effectively prevent the aerosol generating substrate from being burnt or generating peculiar smell, frying oil and the like, and cannot influence the cruising ability of the power supply assembly electrically connected with the atomization core.

Drawings

Fig. 1 is a schematic structural diagram of an electronic atomization device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an atomizer provided in an embodiment of the present application;

FIG. 3 is a front view of an atomizing cartridge provided in accordance with an embodiment of the present application;

FIG. 4 is a side view of the atomizing core of FIG. 3;

FIG. 5 is a schematic view of a heat-generating body according to an embodiment of the present application;

FIG. 6 is a schematic structural view of an atomizing core provided in another embodiment of the present application;

fig. 7 is a flow chart of a method of making an atomizing core according to an embodiment of the present disclosure.

Description of the reference numerals

An electronic atomization device 100; an atomizer 200; a power supply component 300; an atomizing core 10; a suction nozzle 201; a reservoir chamber 202; an atomizing chamber 203; a liquid inlet hole 204; an air flow channel 205; a porous substrate 11; an effective atomization area A; a heating element 12; an electrode 121; the heating line segment 122; a first segment 122 a; a second segment 122 b; a third segment 122 c; the first connection section 122 d; a second connection section 122 e; a third connection section 122 f; and a fourth connection segment 122 g.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The present application will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic atomization device according to an embodiment of the present disclosure; in the present embodiment, an electronic atomization device 100 is provided, and the electronic atomization device 100 may be used in the technical fields of medical treatment, cosmetology, electronic cigarettes, household appliances, and the like, and is used for heating and atomizing an aerosol-generating substrate to form aerosol when being powered on. The aerosol-generating substrate may be a liquid medicament formed by dispersing a pharmaceutical product in a liquid solvent, tobacco tar or any other liquid suitable for electronic atomisation. The electronic atomizer 100 specifically includes an atomizer 200 and a power supply module 300.

Wherein the power supply assembly 300 is electrically connected to the atomizer 200 for supplying power to the atomizing core 10. The power supply assembly 300 may be integrally connected with the nebulizer 200 to reduce the failure rate of the aerosol-generating device. Of course, the battery pack and the atomizer 200 may be detachably connected to facilitate replacement of the power pack 300 or the atomizer 200, thereby improving the utilization rate of the electronic atomizer 100. The power supply module 300 may specifically include a lithium ion battery.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an atomizer according to an embodiment of the present application; the atomizer 200 includes a housing (not shown), an atomizing core 10, and a nozzle 201. Wherein, the shell is provided with a liquid storage cavity 202 and an atomizing cavity 203; the reservoir chamber 202 is for storing an aerosol-generating substrate; the reservoir 202 is in communication with the aerosolization chamber 203 via a fluid inlet 204. The atomizing core 10 is disposed in the atomizing chamber 203 for heating and atomizing the aerosol-generating substrate entering the atomizing chamber 203 from the reservoir 202 to form an aerosol; the aerosol formed by the atomization flows out through the air flow channel 205 for drawing the aerosol flowing out from the air flow channel 205 through the mouthpiece 201. The atomizer 200, in particular operation: the aerosol-generating substrate in the reservoir 202 enters the atomizing chamber 203 through the liquid inlet 204 and then reaches the atomizing core 10, and is heated and atomized into aerosol by the atomizing core 10, and the aerosol reaches the suction nozzle 201 through the air flow channel 205 for the user to suck. The suction nozzle 201 may be provided independently or may be formed integrally with the housing. The specific structure and function of the atomizing core 10 can be referred to the specific structure and function of the atomizing core 10 related to any of the following embodiments; other structures and functions of the atomizer 200 and the electronic atomization device 100 are the same as or similar to those of the existing atomizer 200 and the electronic atomization device 100, and the same or similar technical effects can be achieved.

Referring to fig. 3 to 4, fig. 3 is a front view of an atomizing core according to an embodiment of the present disclosure; fig. 4 is a side view of the atomizing core corresponding to fig. 3. The atomizing core 10 specifically includes a porous base 11 and a heat-generating body 12. As shown in fig. 3 and 4, the porous substrate 11 has a length in the X direction, a width in the Y direction, and a thickness in the Z direction.

Wherein the porous substrate 11 has an atomized surface; the heating element 12 is provided on the atomizing surface of the porous substrate 11, is provided corresponding to the Y direction of the porous substrate 11, and heats and atomizes the aerosol-generating substrate on the porous substrate 11 when energized. Wherein, the ratio of the effective atomization area of the porous matrix 11 to the thickness H of the porous matrix 11 and the porosity of the porous matrix 11 is 6.4 (0.8-1.2) to 0.2-0.3; therefore, the integral atomization efficiency of the atomization core 10 is greatly improved, and the atomization amount of the atomization core 10 is improved; compared with the scheme of increasing the atomization amount by increasing the output power, the method can effectively prevent the aerosol generating substrate from being burnt or peculiar smell, frying oil and the like caused by the increase of the output power; also, since this process does not require adjustment of the output power of power supply assembly 300 electrically connected to atomizing cartridge 10, the cruising ability of power supply assembly 300 is not affected. Wherein the effective atomization area refers to the product of the length L of the projection of the heat-generating body 12 on the porous base 11 in the length direction of the porous base 11 in the effective atomization area a and the width W of the porous base 11. Porosity can be defined as the volume of pores in an object as a percentage of the total volume of the material in its natural state.

In a preferred embodiment, the ratio of the effective atomization area of the porous matrix 11 to the thickness H of the porous matrix 11 and the porosity of the porous matrix 11 is 6.4:1: 0.27. The greater the thickness H of the porous substrate 11, the greater the porosity, which ensures that the aerosol-generating substrate is rapidly transported to the effective atomisation region a to participate in the atomisation to produce an aerosol.

Experiments prove that the porosity of the porous matrix 11 is 50 percent, and the porosity of the heating element 12 is 35 percent; at this time, since the porosity of the heating element 12 is large, the aerosol in the porous substrate 11 can flow into the heating element 12 quickly, the amount of the aerosol-generating substrate absorbed by the heating element 12 increases, and the aerosol-generating substrate absorbs heat before and during atomization, and thus a certain cooling effect is exerted on the heating element 12, so that the overall temperature of the effective atomization area a is reduced, and at this time, the porosity of the porous substrate 11 needs to be reduced, and the problem that the aerosol-generating substrate leaks or is absorbed into the aerosol-generating substrate due to too fast flow is prevented. In another specific example, the porosity of the porous base body 11 is 60%, and the porosity of the heat-generating body 12 is 25%; at this time, compared to the above-described embodiment, since the porosity of the heating element 12 becomes small and the amount of aerosol-generating substrate absorbed by the heating element 12 becomes small, the cooling action of these aerosol-generating substrates on the heating element 12 is weakened, so that the heat generated by the heating element 12 is concentrated and the entire temperature of the effective atomization region a becomes high; therefore, it is necessary to increase the porosity of the porous substrate 11, increase the amount of conduction of the aerosol-generating substrate, and prevent the dry-burn phenomenon from occurring in the effective atomization area a. In still another embodiment, the porosity of the porous base 11 is 70%, and the porosity of the heat-generating body 12 is 20%; at this time, since the porosity of the heating element 12 becomes smaller, the amount of aerosol-generating substrate absorbed by the heating element 12 is further reduced, and therefore the cooling effect of these aerosol-generating substrates on the heating element 12 is further weakened, so that the heat generated by the heating element 12 is more concentrated, and the overall temperature of the effective atomization region a is higher; therefore, the porosity of the porous matrix 11 needs to be further increased to further increase the conductivity of the aerosol-generating substrate and prevent the occurrence of carbon deposition, dry burning, and core pasting in the effective atomization area a.

Consequently, porous base 11's porosity is big more, and heat-generating body 12's porosity can suitably reduce, can guarantee effective atomizing area's aerosol generation matrix like this and fully participate in, promotes atomizing taste, and the porosity of avoiding porous base 11 is big more, and heat-generating body 12's porosity is big more, and produces weeping and/or fried liquid problem, and then scalds the air inlet after taking place to explode the liquid, or lets the user take out the aerosol of large granule, influences experience. Therefore, in the specific embodiment, the ratio of the porosity of the porous base 11 to the porosity of the heat-generating body 12 may be 1 (0.3 to 0.54); at this time, under the condition of 6.5W, the atomization amount of the atomization core 10 can be increased from 5.5-6.5mg/puff to 6.5-7.5 mg/puff, the overall atomization efficiency of the atomization core 10 is effectively increased by more than 15%, and the aerosol formed by atomization has good taste, no burnt smell and high reduction degree. Specifically, the porosity of the porous matrix 11 may be 60% to 70%; preferably, the porosity of the porous matrix 11 may be 65%; the porosity of the heating element 12 may be 15% to 35%.

Wherein, porous base member 11 can be porous ceramic base member, porous ceramic base member's coefficient of heat conductivity is less than 0.5m/c.k, and the coefficient of heat conductivity of heat-generating body 12 is greater than porous base member 11, therefore, the heat can concentrate on heat-generating body 12 better during atomizing to also can produce more aerosol volume when starting to aspirate, its explosive force that has promoted the aerosol promptly, has avoided the heat can transmit whole atomizing core 10 fast betterly, leads to the temperature of atomizing face to descend too fast, the poor problem of atomization effect. Specifically, the porous ceramic matrix may have a length of 8.96mm, a width of 3.98mm, and a thickness of 2.42 mm. Of course, in other embodiments, the length, width and thickness of the porous ceramic may be set according to practical requirements, and the application is not limited thereto.

Specifically, the preparation raw material of the porous ceramic matrix comprises a first solid powder and an organic solvent. Wherein the first solid powder comprises ceramic aggregate, pore-forming agent and sintering aid.

Wherein the ceramic aggregate comprises at least one of natural mineral raw materials and fine ceramic raw materials; the natural mineral raw material is one or more of clay raw material, quartz raw material and feldspar raw material; the clay raw material comprises one or more of kaolin, montmorillonite, bentonite, illite, sericite and muscovite; the quartz-based raw material comprises one or more of but not limited to crystal, vein quartz, fused quartz, sandstone, quartzite, quartz sand, flint and diatomite; the feldspar type raw material comprises one or more of albite, potassium feldspar, anorthite and celsian. The fine ceramic raw material is an artificially synthesized raw material with determined composition structure, and comprises one or more of silicon oxide, aluminum oxide, magnesium oxide, zirconium oxide, calcium hydrophosphate, zirconium silicate and the like.

The pore-forming agent includes but is not limited to at least one of polyvinyl chloride microspheres, polymethyl methacrylate, flour, corn starch and carbon powder. The sintering aid includes but is not limited to at least one of sodium silicate, zirconium silicate, zinc oxide, glass powder and lithium carbonate.

In the specific embodiment, the larger ceramic aggregate particle size distribution is beneficial to the overlapping of particles to form larger pores, so that the target pore diameter is obtained; the natural mineral raw material accounts for 30-80 wt% of the first solid powder, D50 is 30-100 μm, the fine ceramic raw material accounts for 5-50 wt% of the first solid powder, and D50 is 1-50 μm; like this through optimizing the ratio of natural mineral raw materials and meticulous ceramic raw materials for porous ceramic base member after the sintering is more durable, and intensity is better, and in addition, its hole is suitable for the absorption aerosol to generate substrate and aerosol and generates substrate and can supply to heat-generating body 12 fast, avoids aerosol to generate substrate supply not enough and lead to dry combustion method or supply too fast and lead to the problem of revealing. Furthermore, the pore-forming agent accounts for 10-40 wt% of the first solid powder, the pore-forming agent has a D50 content of 20-70 μm, the sintering aid accounts for 5-40 wt% of the first solid powder, and the D50 content is 1-15 μm. Wherein D50 represents a particle size with a cumulative particle distribution of 50%. Also called median or median particle diameter, is a typical value representing the size of the particle, which accurately divides the population into two equal parts, that is to say 50% of the particles exceed this value and 50% are below this value. For example, a sample having a D50 of 5 microns indicates that of all the particle sizes making up the sample, particles larger than 5 microns account for 50% and particles smaller than 5 microns account for 50%.

Organic solvents include paraffins, plastics, surface modifiers and plasticizers. Wherein, the plastic is used for increasing the toughness of the slurry for preparing the porous ceramic matrix, and the plastic comprises at least one of polypropylene, polyethylene, polystyrene and polyamide. The surface modifier comprises at least one of fatty acid, aluminate coupling agent, silane coupling agent and ethylene-propylene copolymer; the plasticizer is used for increasing the plasticity of the slurry, preventing the slurry from cracking in the biscuit forming process and facilitating the forming; specifically, the plasticizer includes, but is not limited to, at least one of diethyl phthalate, di-n-butyl phthalate, and dioctyl phthalate.

In the concrete embodiment, the paraffin accounts for 10-80 wt% of the organic solvent, the plastic accounts for 1-20 wt% of the organic solvent, the surface modifier accounts for 1-10 wt% of the organic solvent, and the plasticizer accounts for 0.5-10 wt% of the organic solvent. In a preferred embodiment, the paraffin accounts for 65% by weight of the organic solvent, the plastic accounts for 15% by weight of the organic solvent, the surface modifier accounts for 10% by weight of the organic solvent, and the plasticizer accounts for 10% by weight of the organic solvent. Thus, the ceramic is not easily deformed during formation and the pore distribution is more reasonable during sintering, so that the porous body 11 produced is able to adsorb the aerosol-generating substrate well.

In order to achieve better atomization effect, the heating element 12 can be a heating film, the film width of the heating film can be 300-450 μm, the thickness of the heating film can be 60-120 μm, and the resistance of the heating film can be 1 Ω.

Specifically, the preparation raw material of the heating element 12 includes two parts, i.e., a second solid powder and an organic vehicle. The second solid powder specifically comprises three parts of conductive metal powder, glass powder and pore-forming agent, the second solid powder accounts for 60-95% of the weight of the preparation raw materials of the heating body 12, and in the sintering process, part of the second solid powder and the porous body 11 are subjected to chemical reaction or physical reaction, so that the heating body 12 and the porous body 11 can be reliably connected, the problem that the heating body is easy to drop due to unreliable connection is avoided, and in addition, better conductive performance and heat conductivity can be ensured. Wherein, the conductive metal powder includes but is not limited to elementary metal and/or alloy metal; the elementary metal can be one or more of gold, silver, platinum, palladium, nickel, iron, tungsten and the like, and the D50 of the elementary metal is 6-10 μm. The alloy metal can be one or more of nickel alloy, iron alloy, titanium alloy, silver palladium ruthenium alloy and the like, and the D50 of the alloy metal is 15-35 mu m. The glass powder comprises one or more of quartz glass, silicate glass, borate glass and phosphate glass; the softening temperature of the glass powder is 600-1100 ℃, and the thermal expansion coefficient of the glass powder is 50 multiplied by 10^-7-100×10^-7℃^-1The D50 of the glass powder is 6-10 μm. The pore-forming agent comprises one or more of polyvinyl chloride microspheres, polymethyl methacrylate, flour and corn starch, and the D50 of the pore-forming agent is 5-20 microns.

In a specific embodiment, the conductive metal powder accounts for 60-90% of the weight of the second solid powder; the glass powder accounts for 5 to 25 percent of the weight of the second solid powder; the pore-forming agent accounts for 2-15% of the second solid powder in percentage by weight, and because the D50 of the alloy metal is 15-35 μm, the D50 of the glass powder is 6-10 μm, and the D50 of the pore-forming agent is 5-20 μm, the heating element 12 prepared by the pore-forming agent can be well matched with the porous body 11, can well adsorb the aerosol generating substrate conducted on the porous body 11, and the aerosol can easily diffuse out in the process of atomizing the aerosol generating substrate.

The organic carrier accounts for 5-40% of the weight of the raw materials for preparing the heating element 12. Specifically, the organic carrier comprises at least four parts of a solvent, a plasticizer, a thickening agent and a thixotropic agent. Wherein, the solvent includes but is not limited to one or more of terpineol, isobutanol, isopropanol, ethanol, alcohol ester twelve, diethylene glycol butyl ether and propylene glycol methyl ether; plasticizers include, but are not limited to, one or more of dimethyl phthalate, diethyl phthalate, diethylene glycol butyl ether acetate, tributyl citrate, dioctyl phthalate; thickeners include, but are not limited to, one or more of ethyl cellulose, cellulose nitrate, acrylic resins, polyvinyl butyral, and the like; thixotropic agents include, but are not limited to, one or more of polyamide wax, hydrogenated castor oil, stearic acid amide, polyether phosphate.

Specifically, the solvent accounts for 40-80% of the weight of the organic carrier, and the plasticizer accounts for 5-45% of the weight of the organic carrier; the thickener accounts for 5 to 15 percent of the weight of the organic carrier; the thixotropic agent accounts for 0.5 to 2 percent of the weight of the organic carrier, so that the porosity of the heating element 12 can be improved, the specific surface area can be enlarged, the oil storage and locking capacity can be improved, and the oil leakage phenomenon can be reduced.

In a specific embodiment, referring to fig. 5 and 6, fig. 5 is a schematic structural view of a heating body 12 provided in an embodiment of the present application; FIG. 6 is a schematic structural view of an atomizing core 10 provided in accordance with another embodiment of the present application; the heat-generating body 12 includes two electrodes 121 and a heat-generating wire section 122 connected between the two electrodes 121. The two electrodes 121 are respectively used for electrically connecting with the positive/negative electrodes of the power module 300. The heating circuit section 122 is used for heating after the electrode 121 is connected with the power supply component 300 for electrification. In an embodiment, the heat-generating line segment 122 is curved, for example, the heat-generating line segment 122 of the heat-generating body 12 may be S-shaped (see fig. 5), N-shaped (see fig. 6), or zigzag, and defines at least two oppositely disposed heat-generating line segments 122; wherein, the two heating circuit sections 122 are arranged in parallel at intervals or in a V shape.

Specifically, the heat generating line segment 122 includes a first segment 122a, a second segment 122b, and a third segment 122c, which are sequentially arranged, and a first connecting segment 122d and a second connecting segment 122e, which connect the first segment 122a, the second segment 122b, and the third segment 122c in series. The first section 122a, the second section 122b and the third section 122c are parallel to each other, and are arranged orderly, so that the processing is convenient. A first connecting section 122d connects the first section 122a and the second section 122b, and a second connecting section 122e connects the second section 122b and the third section 122 c; the first connection section 122d and/or the second connection section 122e are arc-shaped sections, and the first connection section 122d and/or the second connection section 122e are convex in a direction away from the second section 122b and the third section 122 c. In a specific embodiment, one electrode 121 of the two electrodes 121 may be directly connected to the first segment 122a, and the other electrode 121 may be directly connected to the third segment 122 c; of course, the two electrodes may also be connected to the first segment 122a through the third connection segment 122f and/or connected to the third segment 122c through the fourth connection segment 122g, respectively; this allows the electrode to be disposed at a more flexible position, not limited to the end of the first segment 122a or the second segment 122 b.

Specifically, the first connecting section 122d is an arc-shaped section, and the arc-shaped section is a semi-arc shape, so that heat is uniformly diffused when heating, thermal stress is small, and the atomizing core 10 is not easily separated from the porous matrix 11 (i.e., is not easily demolded), so that reliability of the atomizing core is high; the second connecting section 122e is an arc-shaped section, heat can be uniformly diffused during heating, and heat generated at the arc-shaped part is concentrated, so that the atomization speed at the arc-shaped part is high, the explosive force of the aerosol formed by atomizing the aerosol at the heating line section 122 is strong, namely, a large amount of aerosol can be generated instantly by atomization, and a good taste can be brought to a user; therefore, in the connection section of the semicircular connection, not only the heating element 12 or the heating line section 122 is not easy to demould, but also the atomization rate is high, and meanwhile, the connection section has higher reliability and stronger explosive force. The third connecting section 122f and/or the fourth connecting section 122g are straight sections, one end of the third connecting section 122f is connected with one end of the first section 122a far away from the first connecting section 122d through an arc-shaped transition section, and the other end of the third connecting section 122f is connected with the electrode through an arc-shaped transition section. One end of the fourth connecting section 122g is connected with one end of the third section 122c far away from the second connecting section 122e through an arc-shaped transition section, and the other end of the fourth connecting section is connected with the electrode through an arc-shaped transition section.

In the specific embodiment, the shortest distance between the heating element 12 and the edge of the porous substrate 11 is more than or equal to 0.5 mm; so as to ensure that the edge temperature of the atomizing core 10 can be controlled within 100 ℃ in the atomizing process and avoid the peripheral structural member from being heated, melted and deformed. For example, when the cross section of the porous substrate 11 is rectangular, the shortest distance a between the heat-generating line section 122 and the long edge of the porous substrate 11 along the width direction of the porous substrate 11, that is, the shortest distance a between the first connecting section 122d and the second connecting section 122e along the width direction of the porous substrate 11 and the long edge of the porous substrate 11, is greater than or equal to 0.5 mm.

Specifically, experiments prove that when the shortest distance b between two adjacent sections of heating line sections 122 (such as the first section 122a and the second section 122b or the second section 122b and the third section 122c) is less than 0.5mm, the distance between the heating line sections 122 is relatively narrow, so that the porous matrix 11 around the heating element 12 absorbs less heat easily, local high temperature is caused, and the aerosol generating matrix is cracked to generate formaldehyde, so that the formaldehyde exceeds the standard; when b is larger than 0.8mm, because the distance b between the two adjacent heating line sections 122 is wider, the porous matrix 11 absorbs too much heat during atomization, the heat is dispersed, and the low-temperature area in the whole atomization area is too much, so that the release of essence, spice and the like in the aerosol generating substrate is influenced. Therefore, in the specific embodiment, the shortest distance b between every two adjacent sections of the heating line sections 122 is 0.5-0.8 mm, so as to ensure that the temperature of the main atomization area is distributed as uniformly as possible and avoid local high temperature.

According to the atomizing core 10 provided by the embodiment of the application, the ratio of the effective atomizing area of the porous matrix 11 to the thickness H of the porous matrix 11 and the porosity of the porous matrix 11 is 6.4 (0.8-1.2) to (0.2-0.3), so that the overall atomizing efficiency of the atomizing core 10 is greatly improved, and the atomizing amount of the atomizing core 10 is increased; compared with the scheme of increasing the atomization amount by increasing the output power, the method can effectively prevent the aerosol generating substrate from being burnt, or peculiar smell, frying oil and the like from occurring, and meanwhile, the cruising ability of the power supply assembly 300 electrically connected with the atomization core 10 is not influenced. Meanwhile, the heating element 12 is set to be of a porous structure, so that the heating element 12 can be soaked by aerosol generating substrates, the matching performance and the atomization efficiency of the heating element 12 and the aerosol generating substrates with different viscosity ranges are higher, and the fragrance is more fully released; the core is not easy to dry burn and paste; meanwhile, the aerosol formed by atomization has low aldehyde ketone content. In addition, the ratio of the porosity of the porous matrix 11 to the porosity of the heating element 12 can be 1 (0.3-0.54), so that the aerosol generating substrate is atomized more fully, the condensation of the aerosol generating substrate in the transmission process is reduced, and the formed aerosol is fuller.

Specifically, the atomizing core 10 can be produced by the following method for producing an atomizing core. Referring to fig. 7, fig. 7 is a flowchart illustrating a method for manufacturing an atomizing core according to an embodiment of the present application. In this embodiment, a method for preparing an atomizing core is provided, and the method specifically includes:

step S1: and preparing a pre-sintering green body.

Wherein, step S1 specifically includes:

step S11: the method comprises the steps of obtaining ceramic aggregate, pore-forming agent, sintering aid and additive, and mixing to obtain first solid powder.

Specifically, the specific components of the ceramic aggregate, the pore-forming agent, the sintering aid and the additive and the weight percentages of the respective components and the fixed powder material can be referred to the related description above, and are not described in detail herein. In the specific implementation process, after the ceramic aggregate, the pore-forming agent, the sintering aid and the additive are uniformly stirred, the mixture can be further dried for 1.5 to 3 hours at the temperature of between 80 and 150 ℃ to obtain first solid powder.

Step S12: and adding the first solid powder into the organic solvent, and stirring to obtain a mixed material.

Specifically, weighing the organic solvent according to a preset ratio of the first solid powder to the organic solvent, and melting the organic solvent at 80-220 ℃; and then adding the first solid powder into the organic solvent, and stirring for 1-8h to obtain the mixed material. The preset proportion can be set according to actual requirements. Organic solvents include paraffin, plastics, surface modifiers and plasticizers; specific components of the paraffin, the plastic, the surface modifier and the plasticizer and the weight percentage of each component and the organic solvent can be specifically referred to above, and are not described again.

Step S13: and performing injection molding on the mixed material to obtain a prefabricated biscuit.

Specifically, the mixed material is injected into injection molding equipment for molding, so as to obtain a prefabricated biscuit.

Step S14: and (4) carrying out glue discharging on the prefabricated biscuit to obtain a pre-sintered blank.

Specifically, the temperature of the rubber discharge is 500-1100 ℃; in the heating process of removing the glue from the biscuit, the heating rate is 0.1-5 ℃/min when the temperature is below 400 ℃, so that the biscuit can be better prevented from cracking; when the temperature is above 400 ℃, the heating rate is 1-10 ℃/min, thus improving the glue discharging efficiency.

In a specific implementation process, after the pre-sintered green body is obtained, the pre-sintered green body is further sintered to obtain the porous matrix 11. Wherein the sintering temperature is 800-1600 ℃; and in the temperature rise process of sintering the pre-sintered blank, the temperature rise rate is 2-15 ℃/min.

Step S2: and preparing a heating element preform on the atomization surface of the pre-sintered blank.

Wherein, step S2 specifically includes:

step S21: and obtaining and mixing metal powder, pore-forming agent and glass powder to obtain second solid powder.

Specifically, metal powder, pore-forming agent and glass powder are added into a mixing device and fully mixed for 0.5-4 h.

Step S22: and sequentially obtaining a solvent, a plasticizer, a thickening agent and a thixotropic agent, and heating and dissolving to obtain the organic carrier.

Specifically, a solvent, a plasticizer, a thickening agent and a thixotropic agent are sequentially added into a container in a water bath, heated, stirred and dissolved for 1-8 hours until the solution is clear and has no solid residue, so that the organic carrier is obtained. Wherein the water bath heating temperature is 40-90 deg.C, and the stirring speed is 100r/min-2000 r/min.

Step S23: and mixing the second solid powder and the organic carrier according to a preset ratio to obtain the metal resistance slurry.

The preset ratio can be specifically set according to actual requirements, and the present application is not limited thereto.

Step S24: after the metal resistance paste is deposited on the atomized surface of the porous substrate 11, it is dried.

Specifically, the metal resistance paste is arranged on the atomization surface of the porous matrix 11 by means of silk-screen printing or coating, and is dried to prepare a heating element preform on the atomization surface of the porous matrix 11, and a porous ceramic atomization core semi-finished product is obtained. Wherein the drying temperature can be 25-200 ℃, and the drying time can be 10-120 min.

Step S3: and sintering the pre-sintered blank and the heating element preform to enable the pre-sintered blank to form a porous matrix and the heating element preform to form the heating element.

Specifically, the obtained porous ceramic atomizing core semi-finished product is sintered to form the heating body 12 on the porous substrate 11, and the porous ceramic atomizing core 10 is obtained. Wherein the maximum sintering temperature is 700-1000 ℃, and the total sintering time is 2-48 h.

The proportion of the effective atomization area of the prepared porous matrix 11 to the thickness H of the porous matrix 11 and the porosity of the porous matrix 11 is 6.4 (0.8-1.2) to 0.2-0.3 in the atomization core 10 prepared by the preparation method; therefore, the integral atomization efficiency of the atomization core 10 is greatly improved, and the atomization amount of the atomization core 10 is improved; compared with the scheme of increasing the atomization amount by increasing the output power, the method can effectively prevent the aerosol generating substrate from being burnt, or peculiar smell, frying oil and the like from occurring, and meanwhile, the cruising ability of the power supply assembly 300 electrically connected with the atomization core 10 is not influenced. Meanwhile, the porosity of the porous matrix 11 prepared by the preparation method can be 60-70%; preferably, the porosity of the porous matrix 11 may be 65%, and the thermal conductivity of the porous matrix 11 is less than 0.5 m/c.k. In addition, the average aperture of the prepared heating element 12 is 1-5 μm, and the porosity of the heating element 12 is 15% -35%; therefore, the aerosol generating substrate can be transmitted in the heating element 12, the temperature of the heating element 12 can be cooled, the generation of formaldehyde due to overhigh temperature can be avoided, the aerosol generating substrate at the position can be atomized more fully, and the aerosol sucked by each mouth of a user is fuller.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. An atomizing core, comprising:

a porous matrix having an atomizing surface;

a heating element provided on an atomization surface of the porous substrate and configured to heat and atomize the aerosol-generating substrate on the porous substrate when the heating element is energized; wherein the ratio of the effective atomization area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4 (0.8-1.2) to (0.2-0.3).

2. The atomizing core of claim 1, wherein the ratio of the effective atomizing area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4:1: 0.27.

3. The atomizing core according to claim 1, characterized in that the ratio of the porosity of the porous base to the porosity of the heat-generating body is 1 (0.3-0.54).

4. The atomizing core of claim 3, wherein the porous matrix has a porosity of 60% to 70%; and/or

The porosity of the heating element is 15% -35%.

5. The atomizing core according to claim 1, characterized in that the shortest distance from the heating element to the edge of the porous substrate along the width direction of the porous substrate is not less than 0.5 mm.

6. The atomizing core according to claim 1, wherein the heater is curvilinear and defines at least two opposing heater circuit segments; and the shortest distance between every two adjacent sections of the heating circuit sections is 0.5-0.8 mm.

7. The atomizing core according to any one of claims 1 to 6, wherein the raw materials for preparing the porous matrix include a first solid powder and an organic solvent; the first solid powder comprises ceramic aggregate, pore-forming agent and sintering aid, and the organic solvent comprises paraffin, plastic, surface modifier and plasticizer.

8. The atomizing core of claim 7, wherein the ceramic aggregate includes at least one of a natural mineral feedstock, a fine ceramic feedstock; the pore-forming agent comprises at least one of but not limited to polyvinyl chloride microspheres, polymethyl methacrylate, flour, corn starch and carbon powder; the sintering aid comprises at least one of but not limited to sodium silicate, zirconium silicate, zinc oxide, glass powder and lithium carbonate; and/or

The plastic includes but is not limited to at least one of polypropylene, polyethylene, polystyrene, and polyamide; the surface modifier includes but is not limited to at least one of fatty acid, aluminate coupling agent, silane coupling agent and ethylene-propylene copolymer; the plasticizer includes but is not limited to at least one of diethyl phthalate, di-n-butyl phthalate and dioctyl phthalate.

9. The atomizing core of claim 7, wherein the natural mineral feedstock comprises 30% to 80% by weight of the first solid powder material; the fine ceramic raw material accounts for 5-50% of the first solid powder in percentage by weight; the pore-forming agent accounts for 10-40% of the first solid powder by weight; the sintering aid accounts for 5-40% of the weight of the first solid powder.

10. The atomizing core according to claim 7, wherein the paraffin accounts for 10 to 80 weight percent of the organic solvent, the plastic accounts for 1 to 20 weight percent of the organic solvent, the surface modifier accounts for 1 to 10 weight percent of the organic solvent, and the plasticizer accounts for 0.5 to 10 weight percent of the organic solvent.

11. The atomizing core according to any one of claims 1 to 6, characterized in that the raw materials for the preparation of the heat-generating body include a second solid powder and an organic vehicle; wherein the second solid powder accounts for 60-95 wt% of the raw materials for preparing the heating element; the organic carrier accounts for 5-40% of the weight of the raw materials for preparing the heating element.

12. The atomizing core of claim 11, wherein the second solid powder includes an electrically conductive metal powder, a glass powder, and a pore former; the organic vehicle at least comprises a solvent, a plasticizer, a thickener and a thixotropic agent.

13. The atomizing core of claim 12, wherein the conductive metal powder is 60% to 90% by weight of the second solid powder; the glass powder accounts for 5 to 25 percent of the weight of the second solid powder; the pore-forming agent accounts for 2-15% of the second solid powder by weight; and/or

14. An atomizer, comprising:

an atomising core according to any of the claims 1 to 13.

15. An electronic atomization device, comprising:

an atomizer according to claim 14;

and the power supply assembly is connected with the atomizer and used for supplying power to the atomizer.

16. A method of making an atomizing core, comprising:

preparing a pre-sintering green body; and

preparing a heating element prefabricated body on the atomization surface of the pre-sintering blank body;

sintering the pre-sintering blank and the heating element preform to enable the pre-sintering blank to form a porous matrix, wherein the heating element preform forms a heating element; wherein the ratio of the effective atomization area of the porous matrix to the thickness of the porous matrix and the porosity of the porous matrix is 6.4 (0.8-1.2) to (0.2-0.3).

17. The method for preparing an atomizing core according to claim 16, wherein the step of preparing a pre-fired body specifically comprises:

obtaining and mixing ceramic aggregate, a pore-forming agent, a sintering aid and an additive to obtain first solid powder;

adding the first solid powder into an organic solvent, and stirring to obtain a mixed material;

performing injection molding on the mixed material to obtain a prefabricated biscuit;

and removing the glue from the prefabricated biscuit to obtain a pre-sintered blank.

18. The method for preparing the atomizing core according to claim 16, wherein the step of preparing the heating element preform on the atomizing surface of the pre-fired blank body specifically comprises:

obtaining metal powder, a pore-forming agent and glass powder, and mixing to obtain second solid powder; and

sequentially obtaining a solvent, a plasticizer, a thickening agent and a thixotropic agent, and heating and dissolving to obtain an organic carrier;

mixing the second solid powder and the organic carrier according to a preset ratio to obtain metal resistance slurry;

and depositing the metal resistance slurry on the atomized surface of the porous matrix and drying.

19. The method for preparing the atomizing core according to claim 16, characterized in that, in the temperature rise process of sintering the pre-sintered body and the heating element preform, the temperature rise rate is 2 ℃/min to 15 ℃/min; the maximum sintering temperature is 700-1000 ℃, and the total sintering time is 2-48 h.