Atomizing core with overheat protection, electronic cigarette and preparation method of atomizing core
阅读说明：本技术 带过热保护的雾化芯、电子烟及该雾化芯的制备方法 (Atomizing core with overheat protection, electronic cigarette and preparation method of atomizing core ) 是由 冼锐炜 余明先 周超 戴高环 吴沙鸥 王伟江 刘友昌 杨青松 贺鹏华 李毅 于 2019-11-04 设计创作，主要内容包括：本发明涉及电子烟技术领域,具体涉及一种带过热保护的雾化芯、电子烟及该雾化芯的制备方法,其中,雾化芯包括多孔陶瓷基材和与所述多孔陶瓷基材连接的发热电路,所述发热电路采用丝印的方式印刷在所述多孔陶瓷基材上,所述发热电路在200-400℃的温度范围内发生熔断。通过上述方式,本发明实施例的带过热保护的雾化芯在烟油不足或发热电路的功率过大时,当发热电路的温度达到200-400℃温度范围内发生熔断,使电路断开,从而避免发热电路的温度继续上升,进而避免雾化芯干烧产生的糊味和对人体有害的物质,同时也避免烧坏其它部件,造成不必要的损失。(The invention relates to the technical field of electronic cigarettes, in particular to an atomizing core with overheat protection, an electronic cigarette and a preparation method of the atomizing core, wherein the atomizing core comprises a porous ceramic substrate and a heating circuit connected with the porous ceramic substrate, the heating circuit is printed on the porous ceramic substrate in a silk-screen printing mode, and the heating circuit is fused within the temperature range of 200-400 ℃. Through the mode, when the smoke oil is insufficient or the power of the heating circuit is too high, the atomization core with the overheat protection is fused within the temperature range of 200-400 ℃ when the temperature of the heating circuit reaches, so that the circuit is disconnected, the temperature of the heating circuit is prevented from continuously rising, the burnt smell generated by dry burning of the atomization core and substances harmful to a human body are avoided, and other parts are prevented from being burnt out to cause unnecessary loss.)
1. An atomizing cartridge with thermal protection, comprising: the heating circuit is characterized in that the heating circuit is printed on the porous ceramic substrate in a silk-screen printing mode and is fused within the temperature range of 200-400 ℃.
2. The atomizing core of claim 1, wherein the heat-generating circuit fuses within a temperature range of 250 ℃ and 350 ℃.
3. The atomizing core of claim 1, wherein the porous ceramic substrate has a pore size of 10 to 50 μm and a porosity of 40 to 70%.
4. The atomizing core of claim 1 or 2, wherein the heat-generating circuit includes a fusing portion and a normal portion, the fusing portion being connected in series with the normal portion.
5. The atomizing core of claim 4, wherein the fusing portion and the normal portion are made of different materials, and the fusing portion is made of a metal or an alloy material having a low melting point.
6. The atomizing core according to claim 4, wherein the fusing portion and the normal portion are made of the same material, and the wire diameter of the fusing portion is 0.1 to 0.9 times the wire diameter of the normal portion.
7. The atomizing core of claim 1 or 2, wherein the heat-generating circuit is made of a metal or alloy material with a low melting point.
8. The atomizing core of claim 1, wherein an end of the heat-generating circuit is connected to the conductive pin of the porous ceramic substrate by a solder joint.
9. An electronic cigarette, characterized in that the electronic cigarette comprises the atomizing core of any one of claims 1 to 8.
10. A preparation method of an atomization core with overheat protection is characterized by comprising the following steps:
preparing a porous ceramic substrate with the aperture of 10-50 mu m and the porosity of 40-70%;
presetting a silk screen pattern of a heating circuit on the porous ceramic substrate;
printing metal or alloy slurry on the porous ceramic substrate according to the silk screen pattern to form the heating circuit, wherein the heating circuit is fused within the temperature range of 200-400 ℃;
and welding the end part of the heating circuit on the conductive pin of the porous ceramic substrate to obtain the atomizing core.
11. The method of claim 10, wherein the step of preparing a porous ceramic substrate having a pore size of 10 to 50 μm and a porosity of 40 to 70% comprises:
mixing ceramic powder, a sintering aid and a pore-forming agent to obtain mixed powder;
heating and mixing the mixed powder with paraffin and a modifier to obtain a mixed material;
carrying out hot-press casting on the mixed material to obtain a molding material;
and carrying out wax removal and sintering treatment on the molding material to obtain the porous ceramic substrate.
12. The production method according to claim 10, wherein the screen pattern includes a normal portion and a fusion portion, the normal portion being connected in series with the fusion portion; the step of printing a metal or alloy paste on the porous ceramic substrate according to the screen pattern to form the heat-generating circuit includes:
printing high-melting-point metal or alloy slurry on the porous ceramic substrate according to the screen pattern, and sintering in inert gas or reducing gas at the temperature of 500-1300 ℃ to form the common part;
and printing low-melting-point metal or alloy slurry on the porous ceramic substrate according to the screen pattern, and sintering in an inert gas or a reducing gas at the temperature of 150-380 ℃ to form the fusing part.
13. The manufacturing method according to claim 10, wherein the screen pattern includes a normal portion and a fusing portion, the normal portion being connected in series with the fusing portion, the fusing portion having a wire diameter 0.1 to 0.9 times a wire diameter of the normal portion.
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to an atomization core with overheat protection, an electronic cigarette and a preparation method of the atomization core.
Background
Disclosure of Invention
The invention aims to provide an atomizing core with overheat protection, an electronic cigarette and a preparation method of the atomizing core, aiming at the defects in the prior art.
The object of the invention can be achieved by the following technical measures:
an aspect of an embodiment of the present invention provides an atomizing core with overheat protection, including: the heating circuit is printed on the porous ceramic substrate in a screen printing mode and is fused within the temperature range of 200-400 ℃.
According to one embodiment of the invention, the heating circuit is fused within the temperature range of 250-350 ℃.
According to one embodiment of the present invention, the porous ceramic substrate has a pore size of 10 to 50 μm and a porosity of 40 to 70%.
According to an embodiment of the present invention, the heat generating circuit includes a fusing portion and a normal portion, the fusing portion being connected in series with the normal portion.
According to an embodiment of the present invention, the fusing part and the general part are made of different materials, and the fusing part is made of a metal or alloy material having a low melting point.
According to an embodiment of the present invention, the fusing part and the normal part are made of the same material, and a wire diameter of the fusing part is 0.1 to 0.9 times a wire diameter of the normal part.
According to one embodiment of the invention, the heating circuit is made of a metal or alloy material with a low melting point.
According to one embodiment of the invention, the end of the heat generating circuit is connected to the conductive pin of the porous ceramic substrate by a solder joint.
The embodiment of the invention further provides an electronic cigarette which comprises the atomization core.
The embodiment of the invention also provides a preparation method of the atomization core with overheat protection, which is characterized by comprising the following steps:
preparing a porous ceramic substrate with the aperture of 10-50 mu m and the porosity of 40-70%;
presetting a silk screen pattern of a heating circuit on the porous ceramic substrate;
printing metal or alloy slurry on the porous ceramic substrate according to the silk screen pattern to form the heating circuit, wherein the heating circuit is fused within the temperature range of 200-400 ℃;
and welding the end part of the heating circuit on the conductive pin of the porous ceramic substrate to obtain the atomizing core.
According to one embodiment of the present invention, the step of preparing a porous ceramic substrate having a pore size of 10 to 50 μm and a porosity of 40 to 70% comprises:
mixing ceramic powder, a sintering aid and a pore-forming agent to obtain mixed powder;
heating and mixing the mixed powder with paraffin and a modifier to obtain a mixed material;
carrying out hot-press casting on the mixed material to obtain a molding material;
and carrying out wax removal and sintering treatment on the molding material to obtain the porous ceramic substrate.
According to an embodiment of the present invention, the screen pattern includes a normal portion and a fusing portion, the normal portion being connected in series with the fusing portion; the step of printing a metal or alloy paste on the porous ceramic substrate according to the screen pattern to form the heat-generating circuit includes:
printing high-melting-point metal or alloy slurry on the porous ceramic substrate according to the screen pattern, and sintering in inert gas or reducing gas at the temperature of 500-1300 ℃ to form the common part;
and printing low-melting-point metal or alloy slurry on the porous ceramic substrate according to the screen pattern, and sintering in an inert gas or a reducing gas at the temperature of 150-380 ℃ to form the fusing part.
According to an embodiment of the present invention, the screen pattern includes a normal portion and a fusing portion, the normal portion being connected in series with the fusing portion, and a wire diameter of the fusing portion being 0.1 to 0.9 times a wire diameter of the normal portion.
The atomization core with the overheat protection function, the electronic cigarette and the preparation method of the atomization core can prevent the atomization core from being burnt without any fire when the tobacco tar is insufficient or the power of a heating circuit is too high, avoid burnt smell generated by the burning without any fire and substances harmful to a human body, and avoid burning other parts to cause unnecessary loss.
Drawings
Fig. 1 is a schematic perspective view of an atomizing core with overheat protection according to the present invention.
Fig. 2 is a plan view of fig. 1.
Fig. 3 is a schematic structural view of an atomizing core with overheat protection according to a first embodiment of the present invention.
Fig. 4 is a schematic structural view of an atomizing core with overheat protection according to a second embodiment of the present invention.
Fig. 5 is a schematic structural view of an atomizing core with overheat protection according to a third embodiment of the present invention.
FIG. 6 is a flow chart of a method of making an atomizing core with thermal protection in accordance with the present invention.
FIG. 7 is a flow chart of a method of making a porous ceramic substrate in an atomizing core with thermal protection in accordance with the present invention.
Fig. 8 is a flow chart of a method of making a heating circuit in the atomizing core with overheat protection of fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to make the description of the present disclosure more complete and complete, the following description is given for illustrative purposes with respect to the embodiments and examples of the present invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The embodiments are intended to cover the features of the various embodiments as well as the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and step sequences.
An embodiment of the invention discloses an atomizing core with overheat protection, please refer to fig. 1 and fig. 2, fig. 1 is a schematic perspective view of the atomizing core with overheat protection, and fig. 2 is a top view of fig. 1. This atomizing core includes: the
The atomizing core of the embodiment of the invention is easy to be burnt dry when the temperature exceeds 400 ℃ to generate burnt flavor and substances harmful to human bodies, so that the
The silk-screen printing method is to preset a silk screen pattern of the
Further, the porous
Further, referring to fig. 1 and 2, the end of the
In one embodiment, referring to fig. 3, the
When the smoke is insufficient or the power of the
In another embodiment, referring to fig. 4, the
The heat resistance of the
Specifically, in an embodiment, the wire diameter of the
When the smoke oil is insufficient or the power of the
In another embodiment, referring to fig. 5, the overall wire diameter of the
The
The embodiment of the invention discloses an electronic cigarette which comprises the atomizing core. The electronic cigarette of this embodiment has an overheat protection mechanism, solves the electron cigarette dry combustion method problem.
The embodiment of the invention discloses a preparation method of an atomization core with overheat protection, and please refer to fig. 6, the preparation method comprises the following steps:
step S601: preparing a porous ceramic substrate with the aperture of 10-50 mu m and the porosity of 40-70%;
step S602: presetting a silk screen pattern of a heating circuit on a porous ceramic substrate;
step S603: printing metal or alloy slurry on the porous ceramic substrate according to the silk screen pattern to form a heating circuit, wherein the heating circuit is fused within the temperature range of 200-400 ℃;
in step S603, the heat-generating circuit is preferably fused within the temperature range of 250-350 ℃.
Step S604: and welding the end part of the heating circuit on a conductive pin of the porous ceramic substrate to obtain the atomizing core.
Further, referring to fig. 7, step S601 includes the following steps:
step S701: mixing ceramic powder, a sintering aid and a pore-forming agent to obtain mixed powder;
step S702: heating and mixing the mixed powder with paraffin and a modifier to obtain a mixed material;
step S703: carrying out hot-press casting on the mixed material to obtain a molding material;
step S704: and (3) carrying out wax removal and sintering treatment on the molding material to obtain the porous ceramic substrate.
The ceramic powder is diatomite, and the diatomite is mixed with the sintering aid and the pore-forming agent, so that the subsequent mixing efficiency and the uniformity of a mixed material are improved; by mixing the mixed powder with the paraffin and the modifier, the modifier can improve the wettability and the fluidity of the diatomite and the paraffin and can further improve the mixing efficiency and the mixing effect of the mixed powder and the paraffin; the mixed material is formed by adopting a simple hot-press casting forming process, so that the cost can be obviously reduced; after the molding material is subjected to wax removal treatment, a porous paraffin removal material can be obtained, and the paraffin removal material with the shape is beneficial to improving the efficiency and effect of subsequent sintering treatment; through sintering the wax removing material, the pore-forming agent volatilizes, so that the pore distribution on the surface of the ceramic is more uniform, the porosity is increased, the sintering aid is favorable for reducing the sintering temperature of the wax removing material, and the sintering treatment efficiency is further improved.
In one embodiment, referring to fig. 3, the screen pattern includes a normal portion and a fusing portion, the normal portion and the fusing portion are connected in series, referring to fig. 8, the step S603 includes:
step S801: printing high-melting-point metal or alloy slurry on a porous ceramic substrate according to a screen pattern, and sintering in an inert gas or a reducing gas at the temperature range of 500-1300 ℃ to form a common part of the heating circuit;
in step S801, the high melting point alloy includes an iron-cadmium aluminum alloy, a nickel-chromium alloy, stainless steel, etc., and the high melting point metal includes titanium. In other embodiments, the step may also be performed in air, but compared with the operation in air, the operation in the environment of inert gas or reducing gas in this embodiment can prevent the refractory metal or alloy slurry from being oxidized during high-temperature sintering, and thus prevent the resistance of the prepared common part from becoming large, which leads to fusing at normal operating temperature.
Step S802: printing the low-melting-point metal or alloy paste on the porous ceramic substrate according to the screen pattern, and sintering in an inert gas or a reducing gas at the temperature of 150-380 ℃ to form the fusing part of the heating circuit.
In step S802, the metal material includes: the alloy material can be composed of two or more low-melting point metals or composed of low-melting point metals and high-melting point metals, and the alloy material which is melted at a specific temperature can be obtained by adjusting the component proportion of the alloy material, wherein the low-melting point metals comprise gallium, sodium, indium, lithium, tin, bismuth, zinc, magnesium, aluminum, barium, strontium and the like. In other embodiments, the step may also be performed in air, but compared with the operation in air, the operation in the environment of inert gas or reducing gas in this embodiment can prevent the low melting point metal or alloy slurry from being oxidized during high temperature sintering, and thus prevent the resistance of the prepared fusing part from becoming large, which leads to fusing at normal operating temperature.
In another embodiment, referring to fig. 4, the screen pattern includes a normal portion and a fusing portion, the normal portion is connected in series with the fusing portion, the diameter of the fusing portion is 0.1-0.9 times of the diameter of the normal portion, and the fusing portion fuses at a temperature range of 200-. The fusing part and the common part are made of the same material, and the fusing part and the common part are generally made of iron-cadmium-aluminum alloy, nickel-chromium alloy, stainless steel, titanium and other materials. In step S603, after the metal or alloy paste is printed on the porous ceramic substrate according to the screen pattern, it is sintered in the inert gas or the reducing gas at a temperature of 500-1300 ℃ to form a heat generating circuit. The fusing part and the general part of the present embodiment may be printed on the porous ceramic substrate at one time in a screen pattern and sintered at the same temperature. In other embodiments, the step may also be performed in air, but compared with the operation in air, the operation in the environment of inert gas or reducing gas in this embodiment can prevent the metal or alloy slurry from being oxidized during high-temperature sintering, and thus prevent the resistance of the prepared heating circuit from becoming large, which leads to fusing at normal operating temperature.
In another embodiment, referring to fig. 5, the whole of the heat-generating circuit is made of the same low melting point metal or alloy material, and in step S603, after the metal or alloy paste is printed on the porous ceramic substrate according to the screen pattern, the metal or alloy paste is sintered in the temperature range of 150-. In other embodiments, the step may also be performed in air, but compared with the operation in air, the operation in the environment of inert gas or reducing gas in this embodiment can prevent the low-melting point metal or alloy slurry from being oxidized during high-temperature sintering, and thus prevent the resistance of the prepared heating circuit from becoming large, which leads to fusing at normal operating temperature.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
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