Atomization core, electronic cigarette cartridge and electronic cigarette

Abstract

The utility model discloses an atomizing core, a smoke cartridge and an electronic cigarette. The atomization core comprises a ceramic base body and a heating piece arranged on the ceramic base body, the heating piece is provided with an Ag / Cu-graphene silver infiltration composite coating film obtained by plating the surface of the heating piece, and the heating piece can heat and atomize tobacco tar to generate smoke. The surface of the heating sheet is coated with the Ag / Cu-graphene silver-infiltrated composite coating film, silver ions infiltrate between graphene sheet layers, a two-dimensional structure of graphene is changed into a three-dimensional structure, the conductivity is not reduced, meanwhile, the high-temperature resistance of the heating sheet is improved, and the service life of the atomization core is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic cigarettes, and specifically relates to an atomization core, an electronic cigarette cartridge and an electronic cigarette. Background Art

[0002] Electronic cigarettes are mainly composed of four parts: e-liquid (containing nicotine, flavors, solvent propylene glycol, etc.), heating system, power supply and filter. They produce aerosols with specific smells for smokers to use through heating and atomization. In a broad sense, electronic cigarettes refer to electronic nicotine delivery systems, including electronic cigarettes, hookahs, hookah pens and other forms. In a narrow sense, electronic cigarettes refer only to portable electronic cigarettes that look similar to cigarettes.

[0003] The electronic cigarette consists of two parts: the cigarette rod and the cigarette cartridge. The cigarette cartridge can be installed on the cigarette rod in a pluggable manner. Therefore, the core part of the electronic cigarette is the cigarette cartridge area, including the oil storage and atomization chamber. Generally, embedded magnetic suction technology is used, which is plug-and-play, and contains air guide holes to guide the smoke from the atomization chamber out of the entrance. Nicotine salt cigarette cartridges are mostly made of environmentally friendly food-grade PCTG material, while CBD electronic cigarette cartridges are made of glass chambers or transparent nylon.

[0004] At present, the atomizer core structure has evolved through many generations and is mainly divided into the following categories: metal heating wire + cotton core, metal heating wire + fiber rope, porous + metal heating wire co-firing, porous + thick film sintering, steel sheet ceramic core and AX large smoke mesh core ceramic. However, whether it is metal heating wire, steel sheet or metal mesh, it has higher requirements for its conductivity, high temperature resistance, lightweight and thermal insulation performance.

[0005] After searching, for example, Chinese patent CN105394816 A discloses an electronic cigarette and its atomization assembly and atomization element. The atomization element includes a porous body and a porous heating membrane. The porous body includes at least one liquid absorption surface and at least one atomization surface; the porous heating membrane is formed on the atomization surface of the porous body. The porous body can not only block the smoke liquid, but also ensure the liquid conduction effect. The porous heating membrane is used to atomize the smoke liquid in the porous body. The micropores on the porous heating membrane can greatly increase the contact area with the smoke liquid and improve the atomization efficiency. The porous heating membrane is located on the atomization surface of the porous body to facilitate the atomized smoke liquid to escape from the porous body.

[0006] However, although the heating film is conductive, the atomization temperature reaches above 200°C, and the high temperature resistance of the heating film is poor, which shortens the service life of the atomization core. Summary of the invention

[0007] 1. Problems to be solved

[0008] In view of the above technical problems, the purpose of the utility model is to provide an atomizer core, in which the heating sheet has good conductivity and high high temperature resistance, which effectively improves the atomization effect of the atomizer core and prolongs its service life.

[0009] The second purpose of the present utility model is to provide a cigarette cartridge having the above-mentioned atomizing core.

[0010] The third object of the present utility model is to provide an electronic cigarette having the above-mentioned cigarette cartridge.

[0011] 2. Technical solution

[0012] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0013] The utility model firstly provides an atomizer core, comprising: a ceramic substrate and a heating sheet arranged on the ceramic substrate, wherein the heating sheet has an Ag / Cu-graphene silver-infiltrated composite coating obtained by plating the surface thereof, and the heating sheet can generate smoke by heating and atomizing the e-liquid.

[0014] According to any implementation scheme of the first aspect of the purpose of the utility model, the material of the heating plate is one of stainless steel, iron-chromium-aluminum alloy, nickel-chromium alloy and titanium alloy.

[0015] According to any implementation scheme of the first aspect of the purpose of the utility model, the film thickness of the Ag / Cu-graphene silver-infiltrated composite coating is 0.5-5.0 μm.

[0016] According to any implementation scheme of the first aspect of the purpose of the utility model, the material of the heating plate is iron-chromium-aluminum alloy, and an intermediate layer is provided between the heating plate body and the Ag / Cu-graphene silver-infiltrated composite coating, and the intermediate layer has the following characteristics: a thickness of 0.01 to 10 μm.

[0017] According to any implementation scheme of the first aspect of the purpose of the utility model, the metal of the intermediate layer includes any one or two or more of tin, nickel and zinc.

[0018] According to any implementation scheme of the first aspect of the present utility model, the thickness of the heating sheet is 0.1-0.3 mm.

[0019] According to any implementation scheme of the first aspect of the purpose of the utility model, the ceramic substrate includes at least one atomization surface and at least one liquid absorption surface, and the heating plate is arranged on the atomization surface.

[0020] According to any embodiment of the first aspect of the present utility model, the ceramic matrix is ​​a porous ceramic with a porosity of 30% to 83%.

[0021] A second aspect of the present invention provides a cigarette cartridge having the atomizing core described in the first aspect.

[0022] The third aspect of the utility model provides an electronic cigarette, comprising a cigarette holder; a cigarette cartridge connected to the cigarette holder and a battery assembly for powering; characterized in that the cigarette cartridge is the cigarette cartridge described in the second aspect.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] (1) The atomizer core of the utility model is coated with a layer of Ag / Cu-graphene silver-infiltrated composite coating on the surface of its heating plate. Silver ions penetrate between the graphene layers, turning the two-dimensional structure of the graphene into a three-dimensional structure. While not reducing the conductivity, the high temperature resistance of the heating plate is improved, effectively extending the service life of the atomizer core;

[0026] (2) The atomizer core of the utility model has a simple structure and is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solution of the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for the purpose of explanation and are not intended to limit the scope of the utility model. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0028] Figure 1 This is a product picture of the atomizer core of Example 1 of the utility model;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of the heating sheet;

[0030] Figure 3 for Figure 2 A cross-sectional view of a heating sheet;

[0031] Figure 4 for Figure 2 Another cross-sectional view of the heating element;

[0032] Figure 5 This is a schematic diagram of the structure of an electronic cigarette according to Embodiment 1 of the present utility model;

[0033] Figure 6 This is a physical product picture of the atomizer core of Example 2 of the utility model.

[0034] Description of reference numerals:

[0035] 10-cigarette holder, 20-cigarette cartridge, 21-atomization core, 211-ceramic substrate, 2111-atomization surface, 2112-liquid absorption surface, 212-heating sheet, 213-Ag / Cu-graphene silver-infiltrated composite coating, 214-middle layer, 30-battery assembly. DETAILED DESCRIPTION

[0036] The present disclosure may be more easily understood by reference to the following description in conjunction with the accompanying drawings and examples, all of which constitute a part of the present disclosure. It should be understood that the present disclosure is not limited to the specific products, methods, conditions or parameters described and / or shown herein. Further, the terms used herein are only used for the purpose of describing specific embodiments by way of example and are not intended to be limiting unless otherwise stated.

[0037] It should also be understood that, for the sake of clarity, certain features of the present disclosure may be described herein in the context of separate embodiments, but may also be provided in combination with each other in a single embodiment. That is, unless clearly incompatible or specifically not included, each separate embodiment is considered to be combinable with any other embodiment, and the combination is considered to represent another different embodiment. Conversely, for the sake of simplicity, the various features of the present disclosure described in the context of a single embodiment may also be provided individually or in any sub-combination. Finally, although a particular embodiment may be described as part of a series of steps or part of a more general structure, each step or substructure itself may also be considered to be an independent embodiment.

[0038] Unless otherwise indicated, it should be understood that each individual element in a list and each combination of individual elements in the list will be interpreted as a different embodiment. For example, a list of embodiments represented as "A, B, or C" should be interpreted to include embodiments "A", "B", "C", "A or B", "A or C", "B or C", or "A, B, or C".

[0039] In the present disclosure, the singular forms of the articles "a," "an," and "the" also include the corresponding plural references, and a reference to a specific value includes at least that specific value unless the context clearly indicates otherwise. Thus, for example, a reference to "a substance" is a reference to at least one of that substance and equivalents thereof.

[0040] The terms including ordinal numbers such as "first" and "second" can be used to explain various components or fluids, but these components and fluids are not limited by these terms. Therefore, without departing from the teachings of the present disclosure, these terms are only used to distinguish the component / fluid from another component / fluid.

[0041] When items are described by using the conjunction terms "... and / or...," etc., the description should be understood to include any one of the associated listed items and all combinations of one or more thereof.

[0042] In general, the use of the term "about" indicates an approximate value that may vary depending on the desired properties obtained by the disclosed subject matter, and will be interpreted in a context-dependent manner based on function. Therefore, one of ordinary skill in the art will be able to interpret a certain degree of difference on a case-by-case basis. In some cases, the number of significant figures used when expressing a particular value can be a representative technique for determining the difference allowed by the term "about". In other cases, a gradient in a range of values ​​can be used to determine the range of differences allowed by the term "about". Further, all ranges in this disclosure are inclusive and combinable, and reference to the values ​​stated in the range includes each value within the range.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs; the terms used herein and / or include any and all combinations of one or more related listed items.

[0044] Example 1

[0045] like Figure 5 The electronic cigarette shown includes a cigarette holder 10 ; a cigarette cartridge 20 connected to the cigarette holder 10 and a battery assembly 30 for powering; the cigarette cartridge 20 includes an atomizing core 21 .

[0046] like Figures 1 to 4 As shown, the atomizer core 21 of this embodiment includes a ceramic substrate 211 and a heating sheet 212 arranged on the ceramic substrate 211, and the heating sheet 212 has an Ag / Cu-graphene silver-infiltrated composite coating 213 obtained by plating its surface, and the heating sheet 212 can generate heat to atomize the e-liquid to produce smoke. The thickness of the heating sheet 212 is 0.1-0.3mm, and specifically can be 0.1mm, 0.11mm, 0.12mm, 0.12mm, 0.15mm, 0.18mm, 0.2mm, 0.22mm, 0.25mm, 0.28mm, 0.3mm. The ceramic substrate 211 includes at least one atomization surface 2111 and at least one liquid absorption surface 2112, and the heating sheet 212 is arranged on the atomization surface 2111. The ceramic matrix 211 is a porous ceramic with a porosity of 30% to 83%, specifically 30%, 32%, 35%, 38%, 40%, 42%, 45%, 48%, 50%, 55%, 58%, 60%, 64%, 68%, 70%, 72%, 75%, 77%, 80%, and 83%.

[0047] 1) Regarding the Ag / Cu-graphene silver-infiltrated composite coating 213

[0048] The “Ag / Cu-graphene silver-infiltrated composite coating 213” provided by the present invention mainly contains silver and graphene as main components (Ag / Cu-graphene silver-infiltrated composite coating 213).

[0049] The “coating” described herein may also be referred to as a “plating” or a “contact coating”.

[0050] The "heating sheet 212" provided by the utility model mainly includes a main body and the "Ag / Cu-graphene silver-infiltrated composite coating 213" as described above; the "main body" as described herein is mainly considered to have excellent thermal conductivity, electrical conductivity and machinability, and there are no special restrictions on other materials. Based on this, for example, stainless steel (316L, etc.), iron-chromium-aluminum alloy, nickel-chromium alloy, titanium alloy, etc. can be cited.

[0051] The "heating sheet 212" provided in the present invention, and the "Ag / Cu-graphene silver-infiltrated composite coating 213" thereof, usually optionally satisfies any one or more of the following conditions:

[0052] 1) The film thickness of the Ag / Cu-graphene silver-infiltrated composite coating 213 is 0.5-5.0 μm;

[0053] 2) The size of graphene dispersed in the Ag / Cu-graphene silver-infiltrated composite coating 213 is 0.05-6 μm, the content of graphene is 3.0-30 at%, and the orientation of graphene in the Ag / Cu-graphene silver-infiltrated composite coating 213 is at least selected from vertical, parallel and inclined to the body.

[0054] The silver between the graphene sheets will increase the interlayer bonding force of the graphene sheets, and the interlayer bonding force of the graphene sheets will be further increased as the silver content increases, but it should be noted that too much silver will cause serious agglomeration of the graphene and make it unusable; therefore, in some embodiments of the utility model, according to the atoms of the "graphene infiltrated with silver" as the total number, the amount of silver between the graphene sheets is 0.1-50at%, and in some preferred embodiments of the utility model, according to the atomic percentage of the "graphene", the amount of silver between the graphene sheets is 0.1-45at%. It is further explained that the silver content in the "graphene infiltrated with silver" is within the value range of 0.1-50at%, and the conductivity trend line of the "composite coating" is obtained by fitting the experimental data, and the trend line changes basically linearly. In the following embodiments, the "graphene infiltrated with silver" with a silver content of 5at% is used to schematically illustrate the technical solution of the utility model.

[0055] The "Ag / Cu-graphene silver-infiltrated composite coating 213" as described above is formed on the "heating sheet 212 body" by the "electroplating" method, and the "electroplating" includes the following steps 1) and 2):

[0056] 1) Prepare the plating solution and heating element 212

[0057] The plating solution includes components for forming a coating; for example, the coating is a "coating", then the "components for forming a coating" at least include "graphene infiltrated with silver",

[0058] 2) The heating plate 212 is electroplated using the plating solution. The detailed operation of the electroplating for reference is as follows:

[0059] The plating solution is supplied approximately perpendicular to the plated surface of the heating sheet 212, and convects approximately horizontally on the plated surface, or flows approximately horizontally on the plated surface; the heating sheet 212 body is electroplated with the plating solution, and the plating solution is an industrial plating solution containing or not containing cyanide, preferably a plating solution not containing cyanide. The current density during electroplating can be between 0.1A / dm 2 ~100A / dm 2 The thickness of the "plating film" can be adjusted within a range of , and the thickness of the "plating film" can be adjusted by adjusting the current density and time. For example, when the current density is constant, the thickness of the obtained "plating film" can be increased by extending the electroplating time.

[0060] The "silver-infiltrated graphene" used in the electroplating process can be obtained by commercial means, or by self-assembly, chemical reduction, hydrothermal, electrochemical deposition, thermal evaporation, etc. For example, the self-assembly method is to mix the graphene dispersion with pre-prepared or commercially available silver nanopowder or silver ion solution, and combine them through covalent bonds or non-covalent bonds (van der Waals forces, electrostatic forces, intermolecular forces, hydrogen bonds, etc.) to obtain "silver-infiltrated graphene".

[0061] In fact, the graphene used in the preparation of the coating provided by the utility model is pre-processed graphene, and the processing includes: using a solution containing silver ions for dispersion treatment. This is also the reason why the Raman spectrum of the coating has a value of 500±30cm -1One of the key reasons for the peak. The bonding force between graphene layers is the van der Waals force, and the carbon atoms within the layer are bonded by covalent bonds. Therefore, compared with the thermal conductivity within the layer, the thermal conductivity between layers is poor. Finally, the coating provided by the utility model is "infiltrated" with silver ions between the stacked graphene sheets and sheets. Based on this, the two-dimensional structure can be transformed into a three-dimensional structure, which not only improves the problem of poor thermal conductivity between graphene layers in the prior art, but also facilitates the rapid formation of the coating, and is particularly suitable for local small-scale electroplating and high-speed electroplating of heating sheets.

[0062] like Figure 1 , Figure 2 The steel sheet ceramic core shown is a new type of heating element made of microporous ceramic as the matrix, and a metal mesh is embedded in the surface of the ceramic matrix 211 using the inlay technology. Since a whole piece of metal mesh is embedded in the surface of the ceramic matrix 211, it is strong and durable, more resistant to high temperatures, and not easy to break. Since the metal heats more evenly, the heating area is larger, and the heating speed is faster, the smoke liquid is fully atomized instantly, bringing a large amount of smoke, a purer and fuller taste, and a stronger throat hit.

[0063] 2) Regarding the intermediate coating

[0064] The material of the heating plate 212 is iron-chromium-aluminum alloy. An intermediate layer 214 is provided between the heating plate 212 body and the Ag / Cu-graphene silver-infiltrated composite coating 213. The intermediate layer 214 has the following characteristics: a thickness of 0.01 to 10 μm.

[0065] The "intermediate layer" described in the utility model is mainly a "metal intermediate coating", one of the main functions of which is diffusion prevention; the second main function is to improve the bonding force between the "composite coating" and the "substrate"; the third main function is to reduce the induced influence of the "substrate" on the crystal structure of the "composite coating" and improve the all-plating ability of the coating. Therefore, in this case, the "metal intermediate coating" can prevent the elements on the metal surface of the "substrate" in contact (such as iron-chromium-aluminum alloy, nickel-chromium alloy and titanium alloy, etc.) from entering the "composite coating" or diffusing to the surface of the "composite coating" under high temperature environment to form an oxide film. And at the same time, it can enhance the bonding strength between the "substrate" and the "composite coating" and improve the uniformity of the "composite coating". Especially when it comes to the situation where the metal surface of the "substrate" is easy to produce a stable metal oxide film, such as the surface of the connecting part of the "substrate" is an easily passivated metal surface such as iron-chromium-aluminum alloy, nickel-chromium alloy and titanium alloy.

[0066] In this embodiment, an intermediate coating mainly composed of metal Ni is made on the surface of the iron-chromium-aluminum alloy by electroplating. There is no special requirement for its thickness, which can be tens of nanometers and several microns. Here, a Ni intermediate coating with a thickness of 30nm and 3μm is mainly prepared, and then a 5μm thick Ag-Gr (Ag) coating is prepared on the Ni intermediate coating, which are respectively recorded as Ni-03 / Ag-Gr (Ag) and Ni-3 / Ag-Gr (Ag) coatings. Further, the metal of the intermediate layer 214 includes any one or two or more of tin, nickel, and zinc.

[0067] Example 2

[0068] like Figure 6 As shown, the AX large smoke ceramic atomization core 21 of this embodiment includes a ceramic substrate 211 and a heating sheet 212 arranged on the ceramic substrate 211, and the heating sheet 212 has an Ag / Cu-graphene silver-infiltrated composite coating 213 obtained by plating its surface, and the heating sheet 212 can generate heat and atomize the e-liquid to produce smoke. The thickness of the heating sheet 212 is 0.1-0.3mm, and specifically can be 0.1mm, 0.11mm, 0.12mm, 0.12mm, 0.15mm, 0.18mm, 0.2mm, 0.22mm, 0.25mm, 0.28mm, 0.3mm. The ceramic substrate 211 includes at least one atomization surface 2111 and at least one liquid absorption surface 2112, and the heating sheet 212 is arranged on the atomization surface 2111. The ceramic matrix 211 is a porous ceramic with a porosity of 30% to 83%, specifically 30%, 32%, 35%, 38%, 40%, 42%, 45%, 48%, 50%, 55%, 58%, 60%, 64%, 68%, 70%, 72%, 75%, 77%, 80%, and 83%.

[0069] The bimetallic mesh core is embedded on the microporous ceramic substrate 211, which is equivalent to applying two heating sheets 212 on one heating unit, increasing the heating area by 2 times and the heating start speed by 1.5 times. At the same time, the 316 stainless steel mesh core material widely used in the food and medical fields is used, which is safe and reliable.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An atomizing core (21), comprising: A ceramic substrate (211) and a heating sheet (212) disposed on the ceramic substrate (211), characterized in that the heating sheet (212) has an Ag / Cu-graphene silver-infiltrated composite coating (213) obtained by plating the surface thereof, and the heating sheet (212) can generate heat to atomize tobacco oil to produce smoke.

2. The atomizer core (21) according to claim 1, characterized in that: The material of the heating plate (212) is one of stainless steel, iron-chromium-aluminum alloy, nickel-chromium alloy and titanium alloy.

3. The atomizer core (21) according to claim 1 or 2, characterized in that: The Ag / Cu-graphene silver-infiltrated composite coating (213) has a film thickness of 0.5-5.0 μm.

4. The atomizer core (21) according to claim 2, characterized in that: The material of the heating sheet (212) is an iron-chromium-aluminum alloy, and an intermediate layer (214) is provided between the heating sheet (212) body and the Ag / Cu-graphene silver-infiltrated composite coating (213), and the intermediate layer (214) has the following characteristics: Thickness of 0.01 to 10 μm.

5. The atomizer core (21) according to claim 4, characterized in that: The metal of the intermediate layer (214) includes any one or two or more of tin, nickel and zinc.

6. The atomizer core (21) according to claim 1 or 2, characterized in that: The thickness of the heating sheet (212) is 0.1-0.3 mm.

7. The atomizer core (21) according to claim 1 or 2, characterized in that: The ceramic matrix (211) comprises at least one atomization surface (2111) and at least one liquid absorption surface (2112), and the heating plate (212) is arranged on the atomization surface (2111).

8. The atomizer core (21) according to claim 1 or 2, characterized in that: The ceramic matrix (211) is porous ceramic, and its porosity is 30% to 83%.

9. An electronic cigarette cartridge (20), characterized in that: It comprises the atomizer core (21) according to any one of claims 1 to 8.

10. An electronic cigarette, comprising a cigarette holder (10); a cigarette cartridge (20) connected to the cigarette holder (10) and a battery assembly (30) for power supply; characterized in that: The cigarette cartridge (20) is the electronic cigarette cigarette cartridge (20) according to claim 9.

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