Porous ceramic atomizing core with preheating function

Abstract

The utility model discloses a porous ceramic atomizing core with preheating function, including heating wire structure, porous insulating ceramic and porous heating ceramic, the heating wire structure sets up in the porous insulating ceramic, and the porous heating ceramic is adapted with porous insulating ceramic and is set on the porous insulating ceramic with porous heating ceramic, wherein, the heating wire structure includes metal heating wire, first lead wire and second lead wire, and the first end of first lead wire is connected with the first end of metal heating wire, and the second end of first lead wire is stretched out of porous insulating ceramic, and the second end of first lead wire is connected with porous heating ceramic, and the first end of second lead wire is connected with the second end of metal heating wire, and the second end of second lead wire is stretched out of porous insulating ceramic, and the second end of second lead wire is connected with porous heating ceramic. The utility model has can reduce power consumption, promotes atomization amount and the like advantages.

Description

Technical Field

[0001] This utility model belongs to the technical field of porous ceramic atomizing cores, specifically relating to a porous ceramic atomizing core with preheating function. Background Technology

[0002] As a core component of electronic atomizing devices, the porous ceramic atomizing core plays a crucial role in the overall performance of the device, especially in terms of product reliability. Factors such as leakage, burnt taste, and user experience significantly impact the atomizing device. Current manufacturing processes for porous ceramic atomizing cores primarily utilize pore-forming agents. This involves adding volatile or flammable pore-forming agents to the ceramic mix. These agents volatilize or burn out at high temperatures, leaving pores within the ceramic body. Commonly used pore-forming agents include organic resin microspheres, organic fibers, carbon fibers, carbon powder, starch, wood chips, polymethyl methacrylate, and methylcellulose. These organic and inorganic raw materials are mixed and added to molten paraffin wax, stirring until a viscous slurry is formed. A metal heating wire or metal etched sheet is pre-placed in a molding die, and the mixture is hot-pressed to create a ceramic blank with the heating wire or etched sheet. After high-temperature wax removal and sintering, the final product is... The porous ceramic atomizing core prepared by the above methods is mainly a porous ceramic atomizing core containing quartz sand and diatomaceous earth. In this method, the ceramic part of the atomizing core is a uniform whole with no difference in performance between its parts. The metal heating wire or metal etched sheet generates heat when an electric current passes through it. This heat is transferred to the surface of the porous ceramic, causing the atomized liquid to atomize into a gaseous state. Simultaneously, some heat is transferred to the interior and back of the porous ceramic, causing a certain temperature rise in these areas. However, this temperature rise is limited (usually around 100℃). Furthermore, due to the lack of deliberate design, the heat is uncontrollable, resulting in very limited preheating effect on the atomized liquid. To address these uncontrollable factors in existing atomizing cores, it is necessary to design a porous ceramic atomizing core with a preheating function to reduce power consumption and increase atomization volume. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a porous ceramic atomizing core with a preheating function that can reduce power consumption and increase atomization volume.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A porous ceramic atomizing core with preheating function includes:

[0006] Heating wire structure;

[0007] A porous insulating ceramic, wherein the heating wire structure is disposed within the porous insulating ceramic;

[0008] And a porous heating ceramic, adapted to a porous insulating ceramic and sleeved on the porous insulating ceramic, wherein the heating wire structure includes a metal heating wire, a first lead and a second lead, the first end of the first lead is connected to the first end of the metal heating wire, the second end of the first lead extends out of the porous insulating ceramic and is connected to the porous heating ceramic, the first end of the second lead is connected to the second end of the metal heating wire, the second end of the second lead extends out of the porous insulating ceramic and is connected to the porous heating ceramic.

[0009] Preferably, both the porous insulating ceramic and the porous heating ceramic are columnar.

[0010] Preferably, the first and second leads are pure nickel wires, and the metal heating wire is made of any one of nickel-chromium alloy, iron-chromium-aluminum alloy, or 316L.

[0011] Preferably, the second end of the first lead and the second end of the second lead are brazed onto the porous heating ceramic.

[0012] This utility model also discloses a porous ceramic atomizing core with a preheating function, comprising:

[0013] Metal etched mesh;

[0014] A porous insulating ceramic, wherein the metal etched mesh is disposed on the porous insulating ceramic;

[0015] And a porous heating ceramic, adapted to a porous insulating ceramic and disposed on the porous insulating ceramic and attached to the porous insulating ceramic, wherein a first end of the metal etched mesh is connected to a first connecting part, the first connecting part being connected to the porous heating ceramic, and a second end of the metal etched mesh is connected to a second connecting part, the second connecting part being connected to the porous heating ceramic.

[0016] Preferably, both the porous insulating ceramic and the porous heating ceramic are rectangular parallelepipeds.

[0017] Preferably, the metal etched mesh is made of any one of nickel-chromium alloy, iron-chromium-aluminum alloy, or 316L.

[0018] Preferably, the first connecting portion and the second connecting portion are brazed onto the porous heating ceramic.

[0019] By adopting the above technical solution, this utility model has the following beneficial effects:

[0020] This utility model features a porous heating ceramic, and both the metal etched mesh and the heating wire structure are connected to the porous heating ceramic. In specific use, the metal etched mesh or the heating wire structure can generate heat for atomization, and the metal etched mesh and the heating wire structure are respectively connected to the porous heating ceramic. After the metal etched mesh and the heating wire structure are working, the porous heating ceramic can also work and generate heat, thus having a preheating function. At this time, because the porous heating ceramic has a preheating function, when the atomized liquid in the porous ceramic atomizing core with preheating function of this application flows to the atomizing surface of the porous ceramic atomizing core, it carries a certain amount of heat, reducing the power consumption of the atomizing surface, so that the atomizing surface produces a larger amount of atomization under the same heating power.

[0021] In summary, this invention has the advantages of reducing power consumption and increasing atomization volume. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the porous ceramic atomizing core structure with preheating function of this utility model in one embodiment;

[0023] Figure 2 yes Figure 1 Schematic diagram of the structure of porous insulating ceramics;

[0024] Figure 3 yes Figure 1 A schematic diagram of the heating wire structure;

[0025] Figure 4 Here is a schematic diagram of the porous ceramic atomizing core structure with preheating function of this utility model in one embodiment;

[0026] Figure 5 yes Figure 4 Schematic diagram of the structure of porous insulating ceramics;

[0027] Figure 6 yes Figure 4 Schematic diagram of the structure of a metal etching mesh;

[0028] Among them, there are porous insulating ceramic 1, porous heating ceramic 2, metal heating wire 3, first lead wire 4, second lead wire 5, metal etched mesh 6, first connecting part 7, and second connecting part 8. Detailed Implementation

[0029] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0030] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0031] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example 1

[0035] In this embodiment, a porous ceramic atomizing core with a preheating function is proposed. This core has a preheating function, which brings a certain amount of heat when the atomizing liquid flows to the atomizing surface of this application, thereby reducing the power consumption of the atomizing surface and enabling the atomizing surface to produce a larger amount of atomization under the same heating power.

[0036] like Figures 1-3As shown, in one embodiment of this utility model, the porous ceramic atomizing core with preheating function includes a heating wire structure, a porous insulating ceramic 1, and a porous heating ceramic 2. The heating wire structure is disposed within the porous insulating ceramic 1, and the porous heating ceramic 2 is adapted to and sleeved on the porous insulating ceramic 1. The heating wire structure includes a metal heating wire 3, a first lead 4, and a second lead 5. The first end of the first lead 4 is connected to the first end of the metal heating wire 3, and the second end of the first lead 4 extends out of the porous insulating ceramic. 1. The second end of the first lead 4 is connected to the porous heating ceramic 2, the first end of the second lead 5 is connected to the second end of the metal heating wire 3, the second end of the second lead 5 extends out of the porous insulating ceramic 1, and the second end of the second lead 5 is connected to the porous heating ceramic 2. The first lead 4 and the second lead 5 are pure nickel wires. The metal heating wire 3 is made of any one of nickel-chromium alloy, iron-chromium-aluminum alloy, or 316L. The second ends of the first lead 4 and the second ends of the second lead 5 are brazed onto the porous heating ceramic 2. Both the porous insulating ceramic 1 and the porous heating ceramic 2 are columnar.

[0037] Please continue to refer to Figures 1-3 The metal heating wire 3 of this application is made into a spring shape by a wire winding mechanism, and then the first lead wire 4 and the second lead wire 5 are connected to both ends. The porous heating ceramic 2 of this application is a conductive ceramic, which is a semiconductor inorganic non-metallic material with adjustable resistance (such as barium titanate ceramic, silicon carbide ceramic). The barium titanate ceramic used is made by doping rare earth elements such as niobium pentoxide, lanthanum trioxide and yttrium trioxide into the powder of barium carbonate and titanium dioxide as a semiconductor agent. The powder is ball-milled after high temperature synthesis. Then, glass phase materials such as aluminum oxide, silicon trioxide and lithium carbonate are added to the ball-milled synthesis material. At the same time, an organic pore-forming agent is added. The ceramic blank with a certain shape is made by dry pressing, injection molding and hot pressing. The ceramic blank is sintered at high temperature to make a porous heating ceramic 2 with a certain resistance and porosity. Two leads are connected to the two ends of the prepared porous heating ceramic 2 by brazing as electrodes (that is, connected to the first lead wire 4 and the second lead wire 5).

[0038] The porous insulating ceramic 1 of this utility model is made of materials such as quartz sand, diatomaceous earth, alumina, calcium oxide, zinc oxide, and bismuth oxide. The specific preparation process is as follows: the above-mentioned raw materials and pore-forming agents are weighed according to the formula and mixed evenly in a ball mill. The molten paraffin and other organic materials are mixed evenly with the above-mentioned evenly mixed porous ceramic raw materials in a mixer. After molding processes such as injection molding and hot pressing, it is combined with the metal heating wire 3 and the pre-placed porous heating ceramic 2 in the mold. After high-temperature sintering, the three are combined to form a complete porous ceramic atomizing core with preheating function. When in use, the two leads of the metal heating wire 3 are connected to the porous heating ceramic 2 (considered as parallel in the circuit). Then, this application is connected to a battery. After being powered by the battery, both (the porous heating ceramic 2 and the heating wire structure) work simultaneously to generate heat to achieve the functions of preheating and atomization.

[0039] Specifically, in this embodiment, the porous ceramic atomizing core with preheating function can be prepared using the following steps:

[0040] Step 1: Fabrication of heating wire structure

[0041] A nickel-chromium (Ni80Cr20) alloy heating wire with a diameter of 0.16 mm is mounted on a wire winding machine and processed by the wire winding machine to form a spiral metal heating wire 3 with a resistance of 1.3Ω. The heating wire structure of this application consists of three sections: pure nickel wire with a diameter of 0.25 mm at both ends and nickel-chromium (Ni80Cr20) metal heating wire 3 in the middle heating area. The pure nickel wire and the nickel-chromium (Ni80Cr20) metal heating wire 3 in the middle heating area are spot welded together to form a complete heating wire structure.

[0042] Step 2: Preparation of porous heating ceramic 2

[0043] Add 0.8g of niobium pentoxide to 500g of barium titanate powder and mix thoroughly. The powder is then synthesized in a box-type sintering furnace at 1200℃ for 2 hours. The synthesized material is then pulverized into powder through a ball mill and passed through a 300-mesh sieve. Aluminum oxide, silicon dioxide, and lithium carbonate (aluminum oxide, silicon dioxide, and lithium carbonate) are added to the ball-milled material, with a total weight of 3% of the total weight of the barium titanate powder (aluminum oxide: silicon dioxide: lithium carbonate = 1:10:1). Simultaneously, 20% corn starch (by weight) is added. The powder is weighed according to the specified ratio and then placed into a 2L ball mill jar (material:ball = 2:1). The ball mill speed is set to 70 rpm, and the milling time is 8 hours. Add 25% of the total weight of No. 58 paraffin wax to the finished powder, heat it to 70°C in a mixer and stir for 4 hours to fully fuse the ceramic powder and paraffin wax into a slurry with a certain fluidity. Put the slurry into a hot die casting machine and stir for 1 hour. The slurry is then pushed by the compressed air pressure of the machine into a mold to form a hollow cylindrical ceramic blank. The ceramic blank is placed in a box sintering furnace and undergoes processes such as powder embedding, wax removal, and sintering (sintering temperature 1200°C) to produce porous heating ceramic 2. The two ends of the porous heating ceramic 2 produced by the above process are welded with two pure nickel wires with a diameter of 0.3 mm using a vacuum brazing process (that is, connected to the pure nickel wires with a diameter of 0.25 mm at both ends in step 1) to form a complete porous heating ceramic 2.

[0044] Step 3: Preparation of porous insulating ceramic 1

[0045] Weigh 500g of high-purity quartz sand, diatomaceous earth, alumina, and low-temperature glass powder (bismuth borosilicate, melting point around 700℃) according to the formula, with a weight ratio of quartz sand:diatomaceous earth:alumina powder:low-temperature glass powder (bismuth borosilicate) = 2:1:1:1. Then add 20% corn starch by weight of the total powder. After weighing the powder according to the formula, put it into a 2L ball mill jar (material:ball = 2:1). Set the ball mill speed to 70 rpm and the ball milling time to 8 hours. After ball milling, add 25% of No. 58 paraffin wax and 2% stearic acid by weight of the powder, and heat in a mixer to... Stirring at 70℃ for 4 hours allows the ceramic powder and paraffin wax to fully fuse and form a slurry with a certain fluidity. The slurry is then placed in a hot press casting machine and stirred for 1 hour. The pre-installed heating wire structure and the porous heating ceramic 2 prepared in step 2 are then pushed into the mold by the compressed air pressure of the machine, which binds the heating wire structure and the porous ceramic into a whole ceramic blank. The ceramic blank is then placed in a box sintering furnace and subjected to processes such as powder embedding, wax removal, and sintering (sintering temperature 700℃) to form the entire ceramic body, which is the porous ceramic atomizing core with preheating function of this application.

[0046] Example 2

[0047] In this embodiment, another porous ceramic atomizing core with preheating function is proposed. It can have a preheating function, and when the atomizing liquid flows to the atomizing surface of this application, it carries a certain amount of heat, reducing the power consumption of the atomizing surface, so that the atomizing surface can produce a larger amount of atomization under the same heating power.

[0048] Specifically, refer to Figures 4-6 In this embodiment, the porous ceramic atomizing core with preheating function includes a metal etched mesh 6, a porous insulating ceramic 1, and a porous heating ceramic 2. The metal etched mesh 6 is disposed on the porous insulating ceramic 1. The porous heating ceramic 2 is adapted to the porous insulating ceramic 1 and is disposed on the porous insulating ceramic 1 and is in close contact with the porous insulating ceramic 1. The first end of the metal etched mesh 6 is connected to a first connecting part 7, which is connected to the porous heating ceramic 2. The second end of the metal etched mesh 6 is connected to a second connecting part 8, which is connected to the porous heating ceramic 2. Both the porous insulating ceramic 1 and the porous heating ceramic 2 are cuboid in shape. The metal etched mesh 6 is made of any one of nickel-chromium alloy, iron-chromium-aluminum alloy, or 316L. The first connecting part 7 and the second connecting part 8 are brazed onto the porous heating ceramic 2.

[0049] Please continue to refer to Figures 4-6 The metal etched mesh 6 of this application is made by etching metal with a thickness of 0.05-0.1mm according to a design pattern (see details). Figure 6 The porous heating ceramic 2 used in this application is a conductive ceramic, specifically a semiconductor inorganic non-metallic material with adjustable resistance (such as barium titanate ceramic or silicon carbide ceramic). The barium titanate ceramic is made by doping rare earth elements such as niobium pentoxide, lanthanum trioxide, and yttrium trioxide into powders of barium carbonate and titanium dioxide as semiconductor agents. The powders are ball-milled after high-temperature synthesis. Then, glass phase materials such as aluminum oxide, silicon trioxide, and lithium carbonate are added to the ball-milled synthesis material, along with an organic pore-forming agent. The ceramic blanks are formed into ceramic bodies with a certain shape using molding processes such as dry pressing, injection molding, and hot pressing. The ceramic blanks are then sintered at high temperature to form a porous heating ceramic 2 with a certain resistance and porosity. Two leads (i.e., the first connecting part 7 and the second connecting part 8) are connected to the two ends of the prepared porous heating ceramic 2 by brazing to serve as electrodes.

[0050] The insulating ceramic of this application is made of materials such as quartz sand, diatomaceous earth, alumina, calcium oxide, zinc oxide, and bismuth oxide. The specific preparation process is as follows: the above-mentioned raw materials and pore-forming agents are weighed according to the formula and mixed evenly in a ball mill. The molten paraffin and other organic materials are mixed evenly with the above-mentioned evenly mixed porous ceramic raw materials in a mixer. After molding processes such as injection molding and hot pressing, it is combined with the metal etched mesh 6 and the pre-placed porous heating ceramic 2 in the mold. After high-temperature sintering, the three are combined to form a complete porous ceramic atomizing core with preheating function. When in use, the two leads of the metal etched mesh 6 (the first connecting part 7 and the second connecting part 8) and the porous heating ceramic 2 are considered to be connected in parallel. After being powered by a battery, the two work simultaneously to generate heat to achieve the functions of preheating and atomization.

[0051] More specifically, in this embodiment, the porous ceramic atomizing core with preheating function can be prepared using the following steps:

[0052] Step 1: Preparation of metal etching mesh 6;

[0053] A nickel-chromium (Ni80Cr20) alloy heating element with a thickness of 0.08mm is processed into a metal etched mesh 6 with a designed pattern using a special metal etching equipment. The resistance of this heating mesh is 1.3Ω. Around the lines of the metal etched mesh 6 (that is, the lower outer perimeter of the bottom surface), some claws bent to 90° are set so that it can penetrate into the porous insulating ceramic 1 to form a certain bonding force and prevent the metal etched mesh 6 from easily detaching from the porous insulating ceramic 1.

[0054] Step 2: Preparation of porous heating ceramic 2;

[0055] Add 0.8g of niobium pentoxide to 500g of barium titanate powder and mix thoroughly. The powder is then synthesized in a box-type sintering furnace at 1200℃ for 2 hours. The synthesized material is then pulverized into powder through a ball mill and passed through a 300-mesh sieve. Aluminum oxide, silicon dioxide, and lithium carbonate (aluminum oxide, silicon dioxide, and lithium carbonate) are added to the ball-milled material, with a total weight of 3% of the total weight of the barium titanate powder (aluminum oxide: silicon dioxide: lithium carbonate = 1:10:1). Simultaneously, 20% corn starch (based on the total weight of the powder) is added. The powder is weighed according to the specified ratio and then placed into a 2L ball mill jar (material:ball = 2:1, i.e., the mass ratio of the powder to be ground to the grinding media (balls) in the ball mill jar is 2:1). The ball mill speed is set to... The ball milling process is carried out at 70 rpm for 8 hours. After ball milling, 25% of the total weight of No. 58 paraffin wax is added to the powder. The mixture is heated to 70°C and stirred for 4 hours in a mixer to fully fuse the ceramic powder and paraffin wax into a slurry with a certain fluidity. The slurry is then placed in a hot die casting machine and stirred for 1 hour. The slurry is then pushed into a mold by the compressed air pressure of the machine to form a rectangular ceramic blank. The ceramic blank is placed in a box sintering furnace and subjected to processes such as powder embedding, wax removal, and sintering (sintering temperature 1200°C) to produce a porous heating ceramic 2. The porous heating ceramic 2 produced in the above process is joined at both ends by vacuum brazing with two pure nickel leads with a diameter of 0.3 mm (the pure nickel leads are connected to the first connecting part 7 and the second connecting part 8) to form a complete porous heating ceramic 2 body.

[0056] Step 3: Preparation of porous insulating ceramic 1;

[0057] Weigh 500g of high-purity quartz sand, diatomaceous earth, alumina, and low-temperature glass powder (bismuth borosilicate, melting point around 700℃) according to the formula, with a weight ratio of quartz sand:diatomaceous earth:alumina powder:low-temperature glass powder (bismuth borosilicate) = 2:1:1:1. Add 20% corn starch by weight of the total powder. After weighing the powder according to the formula, put it into a 2L ball mill jar (material:ball = 2:1). Set the ball mill speed to 70 rpm and the milling time to 8 hours. After the ball milling is completed, add 25% of No. 58 paraffin wax and 2% stearic acid by weight of the powder. Heat to 70℃ in a mixer and stir for 4 hours to fully fuse the ceramic powder and paraffin wax into a slurry with a certain fluidity. Put the slurry into... After stirring for 1 hour on the hot die casting machine, the metal etched mesh 6 prepared in step 1 and the porous heating ceramic 2 prepared in step 2 are pre-loaded into the molding die. The slurry is pushed into the die by the compressed air pressure of the machine, and the metal etched mesh 6 and the porous heating ceramic 2 are bonded into a whole ceramic blank. The ceramic blank is placed in a box sintering furnace and processed through processes such as powder embedding, wax removal, and sintering (sintering temperature 700℃) to form the whole ceramic body. The two electrodes of the porous heating ceramic 2 are connected in parallel with the two electrodes of the metal etched mesh 6 (first connecting part 7 and second connecting part 8). During operation, the metal etched mesh 6 is heated and the porous heating ceramic 2 is preheated at the same time, thus forming a porous ceramic atomizing core with preheating function.

[0058] The greatest advantage of this application lies in breaking through the limitations of existing single-function porous ceramic atomizing cores. Current porous ceramic atomizing cores mainly use traditional ceramic materials such as silicon dioxide and alumina, which are insulators and non-conductive. Therefore, during operation, the porous ceramic only serves to conduct the atomizing liquid. For viscous atomizing liquids, this single-function ceramic atomizing core cannot preheat the liquid, easily causing core clogging, severely restricting product application and customer experience. Based on the inherent defects of the existing solutions, this patent proposes a completely new solution: adding a layer of conductive porous heating ceramic 2 (0.5-1mm thick) to the surface of the existing atomizing core. When the atomizing core is working, this porous heating ceramic 2 also works, preheating the atomizing liquid. After heating, the viscosity of the atomizing liquid decreases and its fluidity improves. The flow resistance inside the porous insulating ceramic 1 is reduced, thereby ensuring sufficient oil supply to the atomizing surface, effectively avoiding a burnt taste while increasing the atomization volume at the same power.

[0059] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A porous ceramic atomizing core with preheating function, characterized in that, include: Heating wire structure; A porous insulating ceramic, wherein the heating wire structure is disposed within the porous insulating ceramic; And a porous heating ceramic, adapted to a porous insulating ceramic and sleeved on the porous insulating ceramic, wherein the heating wire structure includes a metal heating wire, a first lead and a second lead, the first end of the first lead is connected to the first end of the metal heating wire, the second end of the first lead extends out of the porous insulating ceramic and is connected to the porous heating ceramic, the first end of the second lead is connected to the second end of the metal heating wire, the second end of the second lead extends out of the porous insulating ceramic and is connected to the porous heating ceramic.

2. The porous ceramic atomizing core with preheating function according to claim 1, characterized in that: Both the porous insulating ceramic and the porous heating ceramic are columnar.

3. The porous ceramic atomizing core with preheating function according to claim 1, characterized in that: The first and second leads are pure nickel wires, and the metal heating wire is made of any one of nickel-chromium alloy, iron-chromium-aluminum alloy, or 316L.

4. The porous ceramic atomizing core with preheating function according to claim 1, characterized in that: The second end of the first lead and the second end of the second lead are brazed onto the porous heating ceramic.

5. The porous ceramic atomizing core with preheating function according to claim 4, characterized in that: Both the porous insulating ceramic and the porous heating ceramic are rectangular parallelepiped in shape.

6. A porous ceramic atomizing core with preheating function, characterized in that, include: Metal etched mesh; A porous insulating ceramic, wherein the metal etched mesh is disposed on the porous insulating ceramic; And a porous heating ceramic, adapted to a porous insulating ceramic and disposed on the porous insulating ceramic and attached to the porous insulating ceramic, wherein a first end of the metal etched mesh is connected to a first connecting part, the first connecting part being connected to the porous heating ceramic, and a second end of the metal etched mesh is connected to a second connecting part, the second connecting part being connected to the porous heating ceramic.

7. The porous ceramic atomizing core with preheating function according to claim 6, characterized in that: The metal etched mesh is made of any one of nickel-chromium alloy, iron-chromium-aluminum alloy, or 316L.

8. The porous ceramic atomizing core with preheating function according to claim 6, characterized in that: The first connecting part and the second connecting part are brazed onto the porous heating ceramic.

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