WO2022121579A1

WO2022121579A1 - Atomizing core, atomizer, aerosol generating device and method for machining atomizing core

Info

Publication number: WO2022121579A1
Application number: PCT/CN2021/128851
Authority: WO
Inventors: 邱伟华
Original assignee: 常州市派腾电子技术服务有限公司
Priority date: 2020-12-11
Filing date: 2021-11-05
Publication date: 2022-06-16
Also published as: EP4260716A1; CN114617299A; US20230337742A1

Abstract

The present invention provides an atomizing core, an atomizer, an aerosol generating device and a method for machining an atomizing core. The atomizing core comprises a porous substrate, a heating layer and an electrode; at least one side surface of the porous substrate is provided with an atomizing surface; and by forming an electrode on the porous substrate by using a thick film means, the heating layer is covered on the atomizing surface of the porous substrate, and an electrode does not need to be provided on the heating layer. Therefore, the electrode may be firmly bonded to the porous substrate, and the electrode will also not be impacted by a matrix fluid formed by a high-temperature and high-speed aerosol, so that the electrode does not easily fall off. The method for machining an atomizing core provided in the present invention comprises: first forming an electrode on a porous substrate by using a thick film means; then plating a layer of titanium film on an atomizing surface of the porous substrate by means of a magnetron sputtering process; and then plating a heating layer on the titanium film by means of the magnetron sputtering process, so that the electrode may be firmly bonded to the porous substrate, preventing the electrode from falling off due to the impact of a matrix fluid formed by a high-temperature and high-speed aerosol.

Description

Atomizing core, atomizer, aerosol generating device and atomizing core processing method

technical field

The invention belongs to the technical field of atomizing core processing and simulating smoking, and in particular, relates to an atomizing core, an atomizing core, an atomizer, an aerosol generating device and a processing method for the atomizing core.

Background technique

The film heating type atomizing core used in the aerosol generating device usually attaches the heating film to the atomization surface of the porous substrate, and heats the aerosol-forming matrix on the atomizing surface through the heating film, so that the aerosol forms a matrix mist. turned into smoke. In the current thin-film heating-type atomizing core, the electrodes connecting the power supply device and the heating film are generally arranged on the side of the heating film that is far from the porous substrate. In this way, when the film heating type atomizing core is working, the electrodes are easily detached from the heating film under the condition of being impacted by the matrix fluid formed by the high temperature and high speed aerosol. After the electrode is peeled off from the heating film, the resistance at the place where the electrode falls off will increase, resulting in poor stability and reliability of the overall working performance of the heating film, which not only reduces the service life of the film heating atomizing core, but also causes aerosol to form a matrix. Uneven heating affects the user's taste.

SUMMARY OF THE INVENTION

Based on the above problems in the prior art, one of the objectives of the embodiments of the present invention is to provide a method to form electrodes on the surface of the porous substrate with the atomized surface by means of a thick film, and then to form electrodes on the atomized surface of the porous substrate. The heating layer is plated so that the electrode can be firmly bonded to the atomizing core on the porous substrate.

In order to achieve the above-mentioned purpose, the technical scheme adopted in the present invention is: a kind of atomizing core is provided, comprising:

Porous substrate, at least one surface has an atomizing surface for heating and atomizing the aerosol-forming substrate, the porous substrate has an adsorbing aerosol-forming substrate inside and the adsorbed aerosol-forming substrate penetrates into the atomizing surface the microporous structure;

The heating layer is covered on the atomizing surface, the heating layer is a porous film layer with a microporous structure, and the heating layer is used to heat the aerosol on the atomizing surface to form a matrix, so as to convert the aerosol Forming a matrix that atomizes into smoke; and

an electrode, which is arranged at least on the surface of the porous substrate on one side with the atomizing surface, for electrically connecting the heat generating layer to a power supply device, the electrode is formed on the porous substrate by a thick film method, The heat generating layer is electrically connected to the electrode.

Further, the porous substrate is a porous ceramic piece.

Further, the heat generating layer is a platinum layer plated on the atomized surface.

Further, between the atomizing surface and the heating layer, there is also a metal adhesion layer that combines the heating layer on the atomizing surface, and the metal adhesion layer is a porous membrane layer with a microporous structure. .

Further, the metal adhesion layer is a titanium layer plated on the atomized surface, and the metal adhesion layer is plated on the atomized surface by a magnetron sputtering process.

Further, the heating layer includes a right angle on the atomization surface, and one of the sides of the right angle coincides with the electrode.

Further, the heat generating layer is plated on the side of the metal adhesion layer away from the atomized surface by a magnetron sputtering process.

Further, the electrodes include two electrodes respectively located on opposite sides of the heat generating layer, and the electrodes are formed on the surface of the porous substrate on one side with the atomizing surface.

Further, the electrodes are arranged in pairs and spaced apart, and the two electrodes respectively protrude from one side surface of the porous substrate, so that a groove is formed between the two electrodes, and the inner bottom surface of the groove is The atomization surface is formed, and the atomization surface is rectangular.

Based on the above problems existing in the prior art, the second purpose of the embodiments of the present invention is to provide a method with the method of forming electrodes on the surface of the porous substrate with the atomizing surface by means of a thick film, and then forming electrodes on the atomizing surface of the porous substrate. The atomizer is coated with a heating layer, so that the electrode can be firmly bonded to the atomizer core on the porous substrate.

In order to achieve the above purpose, the technical solution adopted in the present invention is to provide an atomizer, including the atomization core.

Based on the above problems existing in the prior art, the third purpose of the embodiments of the present invention is to provide a method to form electrodes on the surface of the porous substrate with the atomized surface by means of a thick film, and then to form electrodes on the atomized surface of the porous substrate. An aerosol generating device that is plated with a heat-generating layer so that the electrode can be firmly bonded to the porous substrate.

In order to achieve the above object, the technical solution adopted in the present invention is to provide an aerosol generating device, including the atomizing core or the atomizer.

Compared with the prior art, the above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

In the atomizing core, atomizer and aerosol generating device in the embodiment of the present invention, the atomizing core is formed by forming electrodes on the porous substrate in a thick film manner, and the heating layer is covered on the atomizing surface of the porous substrate, without the need for Electrodes are provided on the heat generating layer. Therefore, the electrode can be firmly bonded to the porous substrate, and the electrode will not be impacted by the matrix fluid formed by the high-temperature and high-speed aerosol, so that the electrode is not easy to fall off. In this way, it can not only improve the stability and reliability of the working performance of the heating layer, prolong the service life of the atomizing core, but also increase the heating area of the aerosol-forming substrate, so that the aerosol-forming substrate can be heated more quickly and uniformly, thereby making the atomizing core. It has a good atomization effect and improves the user's taste.

Based on the above problems existing in the prior art, the fourth purpose of the embodiments of the present invention is to provide a method for processing an atomizing core.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a method for processing an atomizing core is provided, comprising the following steps:

Electrode production: The conductive paste is flowed into the microporous structure of the porous substrate through a thick film process, and the porous substrate with the conductive paste screen-printed is sintered at high temperature, so that the porous substrate has an atomized surface on the side surface of the porous substrate. forming electrodes;

Metal adhesion layer production: a first metal film is plated on the atomized surface of the porous substrate by a thick film process to form a metal adhesion layer on the atomized surface of the porous substrate; and

Production of heating layer: a second metal film is plated on the first metal film through a thick film process to form a heating layer that can be energized and heated on the atomized surface of the porous substrate. The electrodes are electrically connected.

Further, in the electrode fabrication step, the depth of the conductive paste flowing into is 10 μm to 100 μm.

Further, in the electrode fabrication step, the porous substrate on which the conductive paste is screen-printed is sintered at a temperature of 450°C to 850°C.

Further, in the electrode fabrication step, the sintering time of the porous substrate screen-printed with the conductive paste is controlled to be 5 min to 50 min.

Further, in the fabrication of the metal adhesion layer, the thickness of the first metal film is 0.005 μm to 0.1 μm.

Further, in the step of manufacturing the heat generating layer, the thickness of the second metal film is 0.2 μm to 1 μm.

In the method for processing the atomizing core in the embodiment of the present invention, the electrodes are firstly formed on the porous substrate in the form of a thick film, and then a metal adhesion layer is plated on the atomized surface of the porous substrate by a thin film process, and then the heating layer is passed through the thin film. The process is plated on the metal adhesion layer to cover a heating layer on the atomized surface of the porous substrate, so that there is no need to arrange electrodes on the heating layer. Therefore, the electrode can be firmly bonded to the porous substrate, and the electrode will not be impacted by the matrix fluid formed by the high-temperature and high-speed aerosol, so that the electrode is not easy to fall off. In this way, it can not only improve the stability and reliability of the working performance of the heating layer, prolong the service life of the atomizing core, but also increase the heating area of the aerosol-forming substrate, so that the aerosol-forming substrate can be heated more quickly and evenly, thereby making the atomizing core. It has a good atomization effect and improves the user's taste.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of an atomizing core provided in Embodiment 1 of the present invention;

Fig. 2 is the partially enlarged structural representation in Fig. 1;

3 is a schematic top-view structural diagram of an atomizing core provided in Embodiment 2 of the present invention;

Fig. 4 is the front view structure schematic diagram of the atomizing core provided by the second embodiment of the present invention;

Fig. 5 is the partial enlarged structural representation in Fig. 4;

FIG. 6 is a schematic three-dimensional structural diagram of a porous substrate provided in Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of four electrode structures according to Embodiment 2 of the present invention.

Among them, each reference sign in the figure:

1-porous substrate; 2-heat-generating layer; 3-electrode; 4-atomizing surface; 5-metal adhesion layer.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

It should be noted that when an element is referred to as being "connected to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection or indirect connection through an intermediate medium, may be internal communication between two elements or an interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, not all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

Please refer to FIGS. 1 to 6 together, and now the atomizing core provided by the embodiment of the present invention will be described. The atomizing core provided by the embodiment of the present invention is used in the atomizer of the aerosol generating device, which can generate heat under the action of electric drive, and heat and atomize the aerosol-forming substrate in the liquid storage chamber of the atomizer to form smoke, so as to form smoke. For users to smoke to achieve the effect of simulating smoking. Please refer to FIG. 4 and FIG. 6 , the atomizing core includes a porous substrate 1, a heating layer 2 and an electrode 3. At least one surface of the porous substrate 1 has an atomizing surface 4, and the inside of the porous substrate 1 has an adsorption aerosol to form a substrate and The adsorbed aerosol forms a matrix that penetrates into the microporous structure of the atomizing surface 4, and the heating layer 2 is covered on the atomizing surface 4, and the aerosol that penetrates into the atomizing surface 4 forms a matrix, which can be heated and fogged by the heating layer 2. turned into smoke. Understandably, the heat generating layer 2 is a thin film, and further, the heat generating layer 2 is a porous thin film layer with a microporous structure, and the smoke formed by heating and atomizing the aerosol-forming substrate can pass through the porous film layer. The heating layer 2 can be, but is not limited to, a platinum film plated on the atomized surface 4 by a magnetron sputtering process. For example, the heating layer 2 can also be a palladium film, a gold-platinum alloy film, or a gold-silver-platinum alloy film. Please refer to FIG. 4 and FIG. 6 , the electrode 3 is arranged on the surface of the porous substrate 1 with the atomizing surface 4 , and the heating layer 2 is electrically connected to the electrode 3 , and the electrode 3 can be electrically connected to the metal elastic needle to connect the The heating layer 2 is electrically connected to the power supply device. In this way, when the atomizing core is working, power is supplied to the heating layer 2 through the power supply device, and when the heating layer 2 is energized, Joule heat will be generated, which can heat the aerosol-forming substrate on the atomizing surface 4 to atomize the aerosol-forming substrate into smoke. In addition, the electrode 3 is formed on the porous substrate 1 by a thick film method, and the heating layer 2 is covered on the atomized surface 4 of the porous substrate 1, so that the electrode 3 is firmly bonded to the porous substrate 1, and the electrode 3 will not Affected by high-temperature and high-speed aerosol-forming matrix fluid, the electrode 3 is not easy to fall off, which can not only improve the stability and reliability of the overall working performance of the heating layer 2, prolong the service life of the atomizing core, but also increase the aerosol-forming matrix. The heating area makes the aerosol-forming substrate evenly heated, which in turn makes the atomizing core have a good atomization effect and improves the user's taste.

Compared with the prior art, in the atomizing core provided by the embodiment of the present invention, the electrode 3 is formed on the porous substrate 1 in the form of a thick film, and the heating layer 2 is covered on the atomizing surface 4 of the porous substrate 1, without the need for Electrodes 3 are provided on the heat generating layer 2 . Therefore, the electrode 3 can be firmly bonded to the porous substrate 1, and the electrode 3 will not be impacted by the matrix fluid formed by the high-temperature and high-speed aerosol, so that the electrode 3 is not easy to fall off. In this way, it can not only improve the stability and reliability of the working performance of the heating layer 2, prolong the service life of the atomizing core, but also increase the heating area of the aerosol-forming matrix, so that the aerosol-forming matrix can be heated more quickly and evenly, thereby making the atomization The core has a good atomization effect and enhances the user's taste.

In some of the embodiments, the porous substrate 1 is a porous ceramic member. The porous ceramic member has excellent characteristics such as stable chemical properties, high temperature resistance, and good insulation, and does not chemically react with the aerosol-forming substrate. Therefore, porous ceramics are used to The porous substrate 1 was fabricated. Among them, the static density of the porous ceramics is only 1.5833g/cm3, the porosity is 52.08%, the specific pore volume is 0.3289ml/g, the specific surface area is 0.0433m2/g, and the median pore diameter is 31.33μm. Understandably, the above-mentioned physical parameters of the porous ceramic member can be reasonably adjusted according to the composition of the aerosol-forming substrate or specific usage requirements. Only the thin film heating layer 2 is covered on the atomizing surface 4 of the porous ceramic piece, and the aerosol-forming substrate permeating on the atomizing surface 4 can be heated and atomized by the heating layer 2 . In this way, the heating area of the aerosol-forming substrate can be increased, so that the aerosol-forming substrate can be heated evenly, and the particles in the aerosol-forming substrate can be prevented from clogging the pores of the porous substrate 1, thereby reducing the carbon deposition of the atomizing core during the atomization process. quantity. It can be understood that, in some of the other embodiments, the porous substrate 1 can also be made of a porous glass material with a microporous structure.

In some of the embodiments, the heating layer 2 is a platinum film plated on the atomizing surface 4, which can not only increase the heating area of the aerosol-forming substrate, make the aerosol-forming substrate evenly heated, but also prevent the aerosol-forming substrate from being heated. The particles block the pores of the porous matrix 1 and reduce the amount of carbon deposits in the atomizing core during the atomization process. It can be understood that the heating layer 2 can be a porous platinum film, a gold-platinum alloy film or a gold-silver-platinum alloy film, etc. The heating layer 2 can be reasonably selected and set according to actual heating needs.

Please refer to FIG. 2 and FIG. 5 , in some of the embodiments, a metal adhesion layer 5 is further provided between the atomizing surface 4 and the heating layer 2 to combine the heating layer 2 on the atomizing surface 4 , and the metal adhesion layer 5 is Porous membrane layer with microporous structure. In this embodiment, a metal adhesion layer 5 is firstly covered on the atomized surface 4 of the porous substrate 1 to increase the adhesion between the heating layer 2 and the porous substrate 1, so that the heating layer 2 can be firmly It is combined with the surface of the porous base 1 and is not easy to fall off, thereby enhancing the stability and reliability of the atomizing core and prolonging the service life of the atomizing core.

In some of the embodiments, the metal adhesion layer 5 is a titanium film plated on the atomized surface 4 . When the porous substrate 1 is a porous ceramic piece made of ceramic material, since the interface between titanium and ceramics can react to form a relatively strong chemical bond, a titanium film is plated on the atomized surface 4 of the porous ceramic piece to make the titanium film firm It is attached to the atomizing surface 4 of the porous ceramic part, and then the heating layer 2 made of metal is covered on the titanium film to increase the adhesion between the heating layer 2 and the atomizing surface 4 of the porous ceramic part. The action of the force makes the heating layer 2 firmly bonded to the surface of the porous substrate 1 and is not easy to fall off, thereby enhancing the stability and reliability of the atomizing core and prolonging the service life of the atomizing core.

Referring to FIG. 5 , in some embodiments, the metal adhesion layer 5 is plated on the atomized surface 4 by a magnetron sputtering process to enhance the firmness of the metal adhesion layer 5 attached to the atomized surface 4 of the porous substrate 1 . Understandably, the metal adhesion layer 5 can also be formed on the atomized surface 4 of the porous substrate 1 by physical vapor deposition such as vapor deposition.

Please refer to FIG. 4 and FIG. 6 , in some embodiments, the heating layer 2 includes a right angle on the atomizing surface, and one of the sides of the right angle coincides with the electrode 3, then in the stage of heating up and starting the atomization, the temperature near the electrode relatively high. This is mainly because the atomization area is small, which makes the heat more concentrated, the heat loss is small, and the atomization surface forms a right angle, there will be local hot spots, making the atomizing core heat up faster, and the amount of smoke atomization is large.

Referring to FIG. 5 , in some embodiments, the heat-generating layer 2 is plated on the side of the metal adhesion layer 5 away from the atomization surface 4 by a magnetron sputtering process, so as to increase the fog of the heat-generating layer 2 and the porous substrate 1 . The effect of the adhesive force between the chemical surfaces 4 makes the heating layer 2 firmly bonded to the surface of the porous substrate 1 and is not easy to fall off. It can be understood that the heat generating layer 2 can also be formed on the metal adhesion layer 5 by physical vapor deposition such as vapor deposition.

Referring to FIG. 1 , in some embodiments, the electrode 3 includes two electrodes located on opposite sides of the heating layer 2 respectively. Optionally, the electrode 3 is made of silver material, and the electrode 3 is formed on the porous substrate 1 with an atomized surface. 4 on one side surface. In this embodiment, the electrode 3 includes two electrodes 3 disposed on the porous substrate 1 in a thick film manner, and the two electrodes 3 are located on opposite sides of the heat-generating layer 2 . The boundary not only increases the heating area of the aerosol-forming substrate, but also makes the thermal power of the heating layer 2 more evenly distributed, so that the aerosol-forming substrate on the atomizing surface 4 can be heated and atomized more quickly and evenly, thereby making the atomization The core has better atomization efficiency and atomization effect.

Please refer to FIG. 4 and FIG. 6 , in some embodiments, the electrodes 3 are arranged in pairs and spaced apart, and the two electrodes 3 respectively protrude from one side surface of the porous substrate 1 , so that a groove is formed between the two electrodes 3 , the inner bottom surface of the groove forms an atomizing surface 4, and the atomizing surface 4 is rectangular. In this embodiment, two electrodes 3 arranged in pairs and spaced apart respectively protrude from one side surface of the porous substrate 1, so that a groove is formed between the two electrodes 3, and the inner bottom surface of the groove forms an atomizing surface 4, And the atomizing surface 4 is rectangular, and both sides of the atomizing surface 4 are bordered by the electrode 3 . In this way, not only the heating area of the aerosol-forming substrate is increased, but also the thermal power of the heating layer 2 is more uniformly distributed, so that the aerosol-forming substrate on the atomizing surface 4 can be heated and atomized more quickly and uniformly, thereby making the atomization possible The core has better atomization efficiency and atomization effect. It can be understood that the electrode 3 can be a silver electrode 3 but is not limited to a silver electrode. For example, the electrode 3 can be a gold electrode or a gold-silver alloy electrode. The specific material of the electrode 3 can be reasonably selected and set according to the actual needs of use. limited.

An embodiment of the present invention further provides an atomizer, where the atomizer includes the atomizing core provided in any of the above embodiments. Since the atomizer has all the technical features of the atomizing core provided by any of the above embodiments, it has the same technical effect as the atomizing core.

An embodiment of the present invention further provides an aerosol generating device, where the aerosol generating device includes the atomizing core provided in any of the foregoing embodiments or the atomizer provided in any of the foregoing embodiments. Since the aerosol generating device has all the technical features of the atomizing core or the atomizer provided by any of the above embodiments, it has the same technical effect as the atomizing core.

The embodiment of the present invention also provides a method for processing an atomizing core, comprising the following steps:

Electrode production: the conductive paste is poured into the microporous structure of the porous substrate 1 through a thick film process, and the porous substrate 1 screen-printed with the conductive paste is sintered at a high temperature, so that the porous substrate 1 has the atomized surface 4 on the side Electrodes 3 are formed on the surface. It can be understood that in this step, the conductive paste can be flowed into the microporous structure of the porous substrate 1 by using a thick film method such as a screen printing process. In some of the embodiments, the conductive paste may be a silver-containing paste, and the conductive paste is a high-viscosity fluid at room temperature. Of course, in some other embodiments, the conductive paste may also be a paste containing gold or a paste containing a mixture of gold and silver.

Understandably, in this step, the porous substrate 1 is a porous ceramic piece with a microporous structure, and the conductive paste is infiltrated into the porous ceramic by a screen printing process. The porous substrate 1 with the conductive paste is sintered at a temperature of 450° C. to 850° C., and the sintering time is controlled to be 5 min to 50 min, and the electrode 3 can be fabricated on the surface of the porous ceramic. Since the electrode 3 is formed on the surface of the porous ceramic with a thick film such as a screen printing process on the surface of the side with the atomized surface 4, it is convenient to realize the electrical connection with the power supply device through the metal spring pin, so as to facilitate the access of external voltage. . Of course, in some of the other embodiments, the porous substrate 1 can also be made of a porous glass material with a microporous structure.

Fabrication of the metal adhesion layer: a first metal film is plated on the atomized surface 4 of the porous substrate 1 through a thick film process to form a metal adhesion layer 5 on the atomized surface 4 of the porous substrate 1 . It can be understood that in this step, a thin film process such as a magnetron sputtering process can be used to coat the first metal film on the atomized surface 4 of the porous substrate 1 . The first metal film may be a titanium film, a zirconium film, a titanium aluminum alloy film, a titanium zirconium alloy film, a titanium molybdenum alloy film, a titanium niobium alloy film, an iron aluminum alloy film, or a tantalum aluminum alloy film, etc. The thickness is 0.005 μm to 0.1 μm. Optionally, the first metal film can be a porous titanium film, and the thickness of the porous titanium film is 0.005 μm to 0.1 μm, and the porous titanium film can be used as a seed layer to increase the adhesion between the heating layer 2 and the porous ceramic. effect. The coating conditions of the porous titanium film are room temperature, 2E-5 Torr vacuum, and 300W power.

Production of heating layer: a second metal film is plated on the metal adhesion layer 5 (first metal film) by a thin film process to form a heating layer 2 that can be energized and heated on the atomized surface 4 of the porous substrate 1 . It can be understood that, in this step, a thick film process such as a magnetron sputtering process can be used to coat the second metal film on the metal adhesion layer 5 (the first metal film). The second metal film may be a platinum film, a palladium film, a palladium-copper alloy film, a gold-silver-platinum alloy film, a gold-silver alloy film, a palladium-silver alloy film, a gold-platinum alloy film, or the like. Wherein, the thickness of the second metal film is 0.2 μm to 1 μm, and the heating layer 2 is electrically connected to the electrode 3 to obtain an atomizing core.

Compared with the prior art, in the method for processing an atomizing core provided by the embodiment of the present invention, the electrode 3 is first formed on the porous substrate 1 in a thick film manner, and then on the atomizing surface 4 of the porous substrate 1 through a thick film process A layer of metal adhesion layer 5 is plated on the atomized surface 4 of the porous substrate 1, and then a heating layer 2 is plated on the metal adhesion layer 5 through a thick film process to form an energized heating layer on the atomized surface 4 of the porous substrate 1. In this way, the heat generating layer 2 is covered on the atomized surface 4 of the porous substrate 1, and there is no need to set the electrode 3 on the heat generating layer 2. Therefore, the electrode 3 can be firmly bonded to the porous substrate 1, and the electrode 3 will not be impacted by the matrix fluid formed by the high-temperature and high-speed aerosol, so that the electrode 3 is not easy to fall off. In this way, it can not only improve the stability and reliability of the working performance of the heating layer 2, prolong the service life of the atomizing core, but also increase the heating area of the aerosol-forming matrix, so that the aerosol-forming matrix can be heated more quickly and evenly, thereby making the atomization The core has a good atomization effect and enhances the user's taste.

During the temperature rise of the atomizing core to start the atomization, the temperature fields of the atomizing surface 4 of different electrodes 3 and different ceramic cores are different, and the temperature near the electrode 3 is relatively slightly higher. Due to the small atomization area, the heat is more concentrated and the heat loss is small, and a right angle should be formed on the atomization surface 4, so that there will be local hot spots, the heating will be faster, and the amount of smoke atomization will be large. Moreover, the heating atomization effect of the atomizing core has a great relationship with the uneven power distribution caused by the uneven current-carrying field caused by the shape of the electrode 3 . That is, if the atomizing surface 4 of the porous substrate 1 forms a part surrounding the electrode 3, the power distribution will be uneven, and there will be a problem of poor heating and atomizing effect. If the boundary of the atomizing surface 4 is relatively regular, the amount of smoke atomization larger. To sum up the above two points, please refer to Fig. 6 for the best solution. The atomizing surface 4 is a rectangle, and the electrodes 3 are on both sides of the atomizing surface 4. In the comparison experiment, as shown in Figure 7, in the smoke volume experiment of the four electrodes 3 A, B, C, and D, the experimental conditions are:

Suction mode: suction for 3s, stop for 30s, cycle 20 ports, test 5 groups of 100 ports;

Suction rate: suction volume 55ml, suction rate 18.3ml/s;

·Heating power: constant power 7W;

The final experimental result is that the amount of smoke of A and B is basically the same, but the amount of smoke of A and B is much larger than that of C and D.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims

A kind of atomizing core, is characterized in that, comprises:

Porous substrate, at least one surface has an atomizing surface for heating and atomizing the aerosol-forming substrate, the porous substrate has an adsorbing aerosol-forming substrate inside and the adsorbed aerosol-forming substrate penetrates into the atomizing surface the microporous structure;

The heating layer is covered on the atomizing surface, the heating layer is a porous film layer with a microporous structure, and the heating layer is used to heat the aerosol on the atomizing surface to form a matrix, so as to convert the aerosol Forming a matrix that atomizes into smoke; and

an electrode, which is arranged at least on the surface of the porous substrate on one side with the atomizing surface, for electrically connecting the heat generating layer to a power supply device, the electrode is formed on the porous substrate by a thick film method, The heat generating layer is electrically connected to the electrode.
The atomizing core according to claim 1, wherein the porous substrate is a porous ceramic piece.
The atomizing core according to claim 1, wherein the heat generating layer is a platinum layer plated on the atomizing surface.
The atomizing core according to claim 1, wherein a metal adhesion layer for bonding the heating layer to the atomizing surface is further provided between the atomizing surface and the heating layer.
The atomizing core according to claim 4, wherein the metal adhesion layer is a titanium layer plated on the atomizing surface, and the metal adhesion layer is plated on the atomizing surface by a magnetron sputtering process face.
The atomizing core according to claim 5, wherein the heat generating layer is plated on the side of the metal adhesion layer away from the atomizing surface by a magnetron sputtering process.
The atomizing core according to claim 1, wherein the heating layer includes a right angle on the atomizing surface, and one of the sides of the right angle coincides with the electrode.
The atomizing core according to any one of claims 1 to 7, wherein the electrodes comprise two electrodes respectively located on opposite sides of the heat generating layer, and the electrodes are formed on the porous base having the on one side of the atomized surface.
The atomizing core according to any one of claims 1 to 7, wherein the electrodes are arranged in pairs and spaced apart, and the two electrodes respectively protrude from one side surface of the porous substrate, so that the two electrodes are A groove is formed between each of the electrodes, the inner bottom surface of the groove forms the atomization surface, and the atomization surface is rectangular.
An atomizer, characterized by comprising the atomizing core according to any one of claims 1 to 9.
An aerosol generating device, characterized in that it comprises the atomizing core as claimed in any one of claims 1 to 9 or the atomizer as claimed in claim 10 .
A method for processing an atomizing core, comprising the steps of:

Electrode production: The conductive paste is flowed into the microporous structure of the porous substrate through a thick film process, and the porous substrate with the conductive paste screen-printed is sintered at high temperature, so that the porous substrate has an atomized surface on the side surface of the porous substrate. forming electrodes;

Metal adhesion layer production: a first metal film is plated on the atomized surface of the porous substrate through a thin film process to form a metal adhesion layer on the atomized surface of the porous substrate; and

Production of heating layer: a second metal film is plated on the first metal film by a thin film process to form a heating layer that can be energized and heated on the atomized surface of the porous substrate. The heating layer and the electrode Electrically connected.
The method for processing an atomizing core according to claim 12, wherein in the electrode manufacturing step, the depth of the conductive paste flowing into is 10 μm to 100 μm.
The method for processing an atomizing core according to claim 12, wherein in the electrode manufacturing step, the porous substrate with the conductive paste printed on the screen is sintered at a temperature of 450°C to 850°C, and the sintering time is controlled at 5 min to 50min.
The method for processing an atomizing core according to claim 12, wherein in the production of the metal adhesion layer, the thickness of the first metal film is 0.005 μm to 0.1 μm.
The method for manufacturing an atomizing core according to claim 12, wherein the thickness of the second metal film in the step of fabricating the heat generating layer is 0.2 μm to 1 μm.