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

Abstract

The application provides an atomizing core, a preparation method thereof, an atomizer and an electronic atomizing device. The atomizing core comprises: a porous ceramic base; the porous ceramic base is a hollow cylinder; a heating body is at least partially arranged on an inner circular arc surface of the hollow cylinder; and a porous covering layer is arranged on the inner circular arc surface of the hollow cylinder and covers at least part of the heating body; wherein a tolerance of the cylindrical degree of the outer circular arc surface of the hollow cylinder is less than or equal to 0.05 mm. The atomizing core can reduce the risk of liquid leakage.

Description

Technical Field

[0001] This invention relates to the field of electronic atomization technology, and in particular to an atomizing core and its preparation method, an atomizer, and an electronic atomization device. Background Technology

[0002] The atomizer core is the core component of an atomizer. Existing cylindrical atomizer cores typically consist of a cylindrical ceramic substrate, a heating element, and a cover layer. The cylindrical ceramic substrate is used to guide the flow of the atomizing medium; the heating element is located within the cylindrical ceramic substrate and is used to generate heat and atomize the atomizing medium to form an aerosol; the cover layer covers the heating element.

[0003] However, the irregular shape of existing cylindrical ceramic substrates leads to poor fit between the substrate and the sealant, resulting in leakage problems. Summary of the Invention

[0004] The atomizing core, its preparation method, atomizer, and electronic atomizing device provided in this application aim to solve the problem of leakage caused by the irregular shape of the cylindrical ceramic substrate, which leads to poor fit between the substrate and the sealing component.

[0005] To solve the above-mentioned technical problems, the first technical solution adopted in this application is: to provide an atomizing core, which includes a porous ceramic substrate; the porous ceramic substrate is a hollow cylinder;

[0006] The heating element is at least partially disposed on the inner arc surface of the hollow cylinder;

[0007] A porous covering layer is disposed on the inner arc surface of the hollow cylinder and covers at least part of the heating element;

[0008] The cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm.

[0009] In one embodiment of this application, the sidewall of the hollow cylinder has a mounting hole; along the axial direction of the hollow cylinder, the mounting hole extends from a first end to a second end of the hollow cylinder; the heating element includes:

[0010] A heating element is disposed on the inner arc surface of the hollow cylinder; the porous covering layer covers the heating element.

[0011] The first lead wire is connected to one end of the heating element and extends from the first end of the hollow cylinder to the second end through the mounting hole;

[0012] The second lead is connected to the other end of the heating element.

[0013] In one embodiment of this application, the heating element is a metal coil or a metal mesh.

[0014] In one embodiment of this application, the porous covering layer is made of ceramic, and the porous covering layer fills the gap of the heating part and is connected to the inner arc surface of the hollow cylinder in the inner arc surface.

[0015] In one embodiment of this application, the porous ceramic matrix has a thickness of 0.5-3 mm and a porosity of 50%-80%; and / or

[0016] The thickness of the porous capping layer is 10µm-200µm and the porosity is 30%-80%.

[0017] To solve the above-mentioned technical problems, the second technical solution adopted in this application is: to provide a method for preparing an atomizing core, the method comprising:

[0018] A porous ceramic substrate is provided; the porous ceramic substrate is a calcined ceramic; the porous ceramic substrate is a hollow cylinder, and the cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm;

[0019] At least a portion of the heating element is disposed on the inner arc surface of the hollow cylinder;

[0020] A prefabricated layer is provided on the inner arc surface of the hollow cylinder to form a prefabricated component; the prefabricated layer covers at least a portion of the heating element;

[0021] The preform is sintered.

[0022] In one embodiment of this application, the sidewall of the hollow cylinder has a mounting hole; along the axial direction of the hollow cylinder, the mounting hole extends from a first end to a second end of the hollow cylinder; wherein, the step of at least partially disposing the heating element on the inner arc surface of the hollow cylinder specifically includes:

[0023] The heating element is positioned on the inner arc surface;

[0024] The first lead of the heating element extends from the first end of the hollow cylinder to the second end through the mounting hole.

[0025] In one embodiment of this application, the step of forming a prefabricated component by providing a prefabricated layer on the inner arc surface of the hollow cylinder specifically includes:

[0026] The hollow cylinder is filled with adhesive slurry;

[0027] The adhesive slurry is dried to form a dried body;

[0028] Through holes are made in the dried body so that the remaining part of the dried body forms the preform layer.

[0029] In one embodiment of this application, the step of forming a preform on the inner arc surface preform layer of the hollow cylinder specifically includes:

[0030] A support column is provided inside the hollow cylinder;

[0031] The hollow cylinder is filled with adhesive slurry;

[0032] The adhesive slurry is dried to form the precast layer;

[0033] Remove the support column.

[0034] In one embodiment of this application, the adhesive paste includes one or more of alumina, silicon oxide, silicon carbide, zirconium oxide, and glass powder.

[0035] In one embodiment of this application, in the step of sintering the preform, the sintering temperature is 400-1100℃ and the holding time is 10min-4H.

[0036] To solve the above-mentioned technical problems, the third technical solution adopted in this application is: to provide an atomizing core, which is prepared by the preparation method described above.

[0037] To solve the above-mentioned technical problems, the fourth technical solution adopted in this application is: to provide an atomizer, the atomizer comprising:

[0038] The shell has a liquid storage compartment; the liquid storage compartment has a liquid outlet.

[0039] The atomizing core is disposed within the housing;

[0040] A sealing element is disposed between the outer arc surface of the hollow cylinder and the shell;

[0041] The atomizing core is the atomizing core mentioned above, and the outer arc surface of the hollow cylinder blocks the liquid outlet.

[0042] In one embodiment of this application, the second surface of the outer arc of the hollow cylinder is directly exposed inside the liquid storage chamber.

[0043] In one embodiment of this application, the liquid storage chamber has an annular inner sidewall and an annular outer sidewall spaced apart. The annular inner sidewall is cylindrical and has the liquid outlet. The atomizing core is sleeved inside the annular inner sidewall. The sealing member includes an annular sidewall, which is sandwiched between the outer arc surface of the hollow cylinder and the annular inner sidewall. The annular sidewall is cylindrical and fits against the outer arc surface of the hollow cylinder.

[0044] In one embodiment of this application, the number of the sealing elements is two, defined as a first sealing element and a second sealing element; wherein,

[0045] The first sealing element includes a first annular sidewall and a top wall connected to the first annular sidewall; the first annular sidewall is sandwiched between the outer arc surface of the top end of the hollow cylinder and the annular inner sidewall; the top wall is disposed on the end face of the top end of the hollow cylinder and has a first clearance hole communicating with the hollow cylinder.

[0046] The second sealing element includes a second annular sidewall and a bottom wall connected to the second annular sidewall; the second annular sidewall is sandwiched between the outer arc surface of the bottom end of the hollow cylinder and the inner annular sidewall; the bottom wall is disposed on the end face of the bottom end of the hollow cylinder and has a second clearance hole communicating with the hollow cylinder.

[0047] To solve the above-mentioned technical problems, the fifth technical solution adopted in this application is: to provide an atomizer, the atomizer comprising:

[0048] The shell has a liquid storage compartment; the liquid storage compartment has a liquid outlet.

[0049] An atomizing core is disposed within the housing; wherein the atomizing core comprises:

[0050] Porous ceramic matrix; the porous ceramic matrix is ​​a hollow cylinder;

[0051] The heating element is at least partially disposed on the inner arc surface of the hollow cylinder;

[0052] A porous covering layer is disposed on the inner arc surface of the hollow cylinder and covers at least part of the heating element;

[0053] A sealing element is disposed between the outer arc surface of the hollow cylinder and the shell;

[0054] Wherein, the portion of the outer arc surface of the hollow cylinder covered by the sealing element is defined as the sealing surface, and the cylindricity tolerance of at least the sealing surface of the hollow cylinder is less than or equal to 0.05 mm.

[0055] In one embodiment of this application, the liquid storage chamber has an annular inner sidewall and an annular outer sidewall spaced apart. The annular inner sidewall is cylindrical and has the liquid outlet. The atomizing core is sleeved inside the annular inner sidewall, and the outer arc surface of the hollow cylinder is directly exposed to the liquid storage chamber through the liquid outlet. The sealing member includes an annular sidewall, which is sandwiched between the sealing surface of the hollow cylinder and the annular inner sidewall. The annular sidewall is cylindrical and fits against the sealing surface of the hollow cylinder.

[0056] In one embodiment of this application, the number of sealing elements is two, defined as a first sealing element and a second sealing element; the outer arc surface at the top of the hollow cylinder forms a first sealing surface, and the outer arc surface at the bottom of the hollow cylinder forms a second sealing surface; wherein...

[0057] The first sealing element includes a first annular sidewall and a top wall connected to the first annular sidewall; the first annular sidewall is sandwiched between the first sealing surface and the annular inner sidewall; the top wall is disposed on the end face of the top of the hollow cylinder and has a first clearance hole communicating with the hollow cylinder;

[0058] The second sealing element includes a second annular sidewall and a bottom wall connected to the second annular sidewall; the second annular sidewall is sandwiched between the second sealing surface and the annular inner sidewall; the bottom wall is disposed on the end face of the bottom end of the hollow cylinder and has a second clearance hole communicating with the hollow cylinder.

[0059] To solve the above-mentioned technical problems, the sixth technical solution adopted in this application is: to provide an electronic atomizing device, which includes: the atomizer mentioned above; and a power supply component for controlling the atomizer.

[0060] The beneficial effects of the embodiments of this application, which differ from the prior art, are as follows: The atomizing core provided in the embodiments of this application includes a porous ceramic substrate, which is a hollow cylinder; wherein, the cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm; by making the cylindricity tolerance of the outer arc surface of the hollow cylinder less than or equal to 0.05 mm, the outer shape of the porous ceramic substrate is relatively regular. When a sealing element is used in the atomizer, the gap between the sealing element and the porous ceramic substrate is smaller, which improves the fit between the sealing element and the porous ceramic substrate, thereby effectively reducing the risk of leakage. Attached Figure Description

[0061] Figure 1a A vertical cross-sectional view of an atomizer provided in an embodiment of this application;

[0062] Figure 1b for Figure 1a Enlarged view of point M in the image;

[0063] Figure 2 This is a schematic diagram of the overall structure of the atomizing core provided in an embodiment of this application;

[0064] Figure 3 Provided for an embodiment of this application Figure 2 A cross-sectional view of the atomizing core along the AA direction is shown.

[0065] Figure 4A schematic diagram illustrating the measurement of the cylindricity of a workpiece using a dial indicator and a V-block, provided as an embodiment of this application;

[0066] Figure 5 A vertical cross-sectional view of a hollow cylinder provided in an embodiment of this application;

[0067] Figure 6 A flowchart illustrating a method for preparing an atomizing core according to an embodiment of this application;

[0068] Figure 7 This is a schematic diagram of a structure in which a heating element is disposed on a porous ceramic substrate according to an embodiment of this application;

[0069] Figure 8 and Figure 9 This is a schematic diagram of the structure corresponding to the specific process of step S3 provided in one embodiment of this application;

[0070] Figures 10 to 11 This is a structural diagram showing the specific process of step S3 provided in another embodiment of this application;

[0071] Figure 12 This is a photograph of the atomizing core prepared by the experimental group of this application.

[0072] Figure 13 This is a physical image of the atomizing core prepared in proportion to the model of this application.

[0073] Figure description markings

[0074] 1. Shell; 11. Liquid storage chamber; 11a. Annular inner sidewall; 11b. Annular outer sidewall; 12. Liquid outlet; 2. Atomizing core; 21. Porous ceramic substrate; 211. Mounting hole; 22. Heating element; 221. Heating section; 222. First lead wire; 223. Second lead wire; 23. Porous covering layer; 231. Adhesive slurry; 232. Through hole; 3. Sealing element; 31. First sealing element; 311. First annular sidewall; 312. Top wall; 313. First clearance hole; 32. Second sealing element; 321. Second annular sidewall; 322. Bottom wall; 323. Second clearance hole; 4. Support column. Detailed Implementation

[0075] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0076] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0077] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0078] In related technologies, the outer circumference of the cylindrical ceramic substrate is irregular. If a seal is used directly, a gap will form between the seal and the outer side of the cylindrical ceramic substrate, leading to leakage of the atomizing core. Therefore, a cotton core needs to be wrapped around the cylindrical ceramic substrate. While this solution can prevent leakage during the suction process, the cotton-wrapped ceramic substrate introduces new problems: Firstly, the high thermal insulation properties of cotton make it difficult for heat from the heating element to be transferred to the side of the cotton core away from the heating element to preheat the atomizing medium around the heating element and reduce its viscosity. This results in insufficient liquid supply due to high flow resistance of the atomizing medium. Secondly, the cotton core itself has high porosity, preventing the atomizing medium stored inside from being atomized, leading to waste.

[0079] Therefore, the deformation of the cylindrical ceramic matrix affects the normal atomization of the atomizer.

[0080] This application provides an atomizing core with a small cylindricity tolerance on the outer arc surface of its hollow cylinder and a relatively regular shape. When a sealing element is used in the atomizer, the gap between the sealing element and the periphery of the porous ceramic substrate is small, effectively reducing the risk of leakage. Simultaneously, there is no need to wrap a cotton wick around the porous ceramic substrate, avoiding various problems caused by this. Furthermore, the small cylindricity tolerance on the inner arc surface of the hollow cylinder results in a more uniform distance between the heating element and the inner arc surface (i.e., the atomizing surface) of the hollow cylinder, allowing for more even heating of the heating element.

[0081] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0082] In one embodiment, an electronic atomizing device is provided, which can be used to atomize an atomizing medium to form an aerosol for a user to inhale. The atomizing medium can be a plant-based matrix, a paste-like matrix, or a liquid matrix such as oils or liquids with added flavoring ingredients. For example, the atomizing medium can be e-liquid. Specifically, the electronic atomizing device includes an atomizer and a power supply component.

[0083] The atomizer can be used in various fields, such as medical nebulization, recreational inhalation, or hair care. Specifically, the atomizer is used to heat and atomize the atomizing medium to form an aerosol when powered on. Specifically, the atomizer can be any of the atomizers described in the following embodiments, and its specific structure and function can be found in the description of the specific structure and function of the atomizer in the following embodiments, achieving the same or similar technical effects, as detailed below.

[0084] The power supply assembly is electrically connected to the atomizer and is used to control the atomizer. Specifically, the power supply assembly can supply power to the atomizer to control its on / off state. The atomizer and power supply assembly can be detachably connected to facilitate atomizer replacement and improve the utilization rate of the power supply assembly. Of course, in other embodiments, the power supply assembly and atomizer can also be integrated, and this application does not impose any limitations on this.

[0085] The power supply assembly may include a battery, a bracket, an airflow sensor (not shown), and a control circuit board (not shown). The battery specifically powers the atomizer, while the airflow sensor detects the user's inhalation state and transmits the detection result to the control circuit board to control the atomizer's start and stop. The battery, airflow sensor (not shown), and control circuit board (not shown) are all mounted on the bracket, which supports them.

[0086] In one embodiment, see Figures 1a to 1b , Figure 1a A vertical cross-sectional view of an atomizer provided in an embodiment of this application; Figure 1b for Figure 1aThe enlarged view at point M shows the atomizer, which includes a housing 1, an atomizing core 2, and a sealing element 3. The housing 1 has a liquid storage chamber 11 for storing the atomizing medium. The liquid storage chamber 11 has a liquid outlet 12 through which the atomizing medium flows out. The atomizing core 2 is disposed inside the housing 1, sealing the liquid outlet 12 and communicating with the liquid storage chamber 11 through the liquid outlet 12, for atomizing the atomizing medium to form an aerosol.

[0087] See Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the overall structure of the atomizing core 2 provided in an embodiment of this application; Figure 3 Provided for an embodiment of this application Figure 2 The image shows a cross-sectional view of the atomizing core 2 along line AA. In one embodiment, the atomizing core 2 includes a porous ceramic substrate 21, a heating element 22, and a porous covering layer 23.

[0088] The porous ceramic substrate 21 is a hollow cylinder with multiple micropores. These micropores exert capillary forces to guide the atomizing medium from the outer arc surface (i.e., the liquid absorption surface) to the inner arc surface (i.e., the atomizing surface) of the hollow cylinder. At least a portion of the heating element 22 is disposed on the inner arc surface of the hollow cylinder, used to heat and atomize the atomized medium drawn to the inner arc surface of the hollow cylinder to form an aerosol. The material of the heating element 22 may include one or more of nickel-chromium, iron-chromium-aluminum, and stainless steel. A porous covering layer 23 is disposed on the inner arc surface of the hollow cylinder and covers at least a portion of the heating element 22, used to protect the heating element 22. For example, the porous covering layer 23 covers the entire inner arc surface of the hollow cylinder.

[0089] The sealing element 3 is disposed between the outer arc surface of the hollow cylinder and the shell 1 to seal the gap between the hollow cylinder and the shell 1. The sealing element 3 can be made of plastic or rubber.

[0090] In some embodiments, combined with Figure 1b The liquid storage chamber 11 has an annular inner wall 11a and an annular outer wall 11b spaced apart. The annular inner wall 11a is cylindrical and has a liquid outlet 12. The atomizing core 2 is sleeved inside the annular inner wall 11a. The sealing element 3 includes an annular sidewall, which is sandwiched between the outer arc surface of the hollow cylinder and the annular inner wall 11a. The annular sidewall is cylindrical and fits against the outer arc surface of the hollow cylinder.

[0091] In some embodiments, please continue reading Figure 1b There are two seals 3, defined as the first seal 31 and the second seal 32. The hollow cylinder has opposite top and bottom ends along the axial direction Y of the atomizer.

[0092] The first sealing element 31 includes a first annular sidewall 311 and a top wall 312 connected to the first annular sidewall 311. The first annular sidewall 311 is sandwiched between the outer arc surface of the top end of the hollow cylinder and the annular inner sidewall 11a. The top wall 312 is disposed on the end face of the top end of the hollow cylinder, and the top wall 312 of the first sealing element 31 has a first clearance hole 313 communicating with the hollow cylinder. The first clearance hole 313 exposes the hollow structure of the hollow cylinder so that the aerosol formed by atomization can flow out to the nozzle of the atomizer through the first clearance hole 313.

[0093] The second sealing element 32 includes a second annular sidewall 321 and a bottom wall 322 connected to the second annular sidewall 321. The second annular sidewall 321 is sandwiched between the outer arc surface of the bottom end of the hollow cylinder and the annular inner sidewall 11a; the bottom wall 322 is disposed on the end face of the bottom end of the hollow cylinder, and the bottom wall 322 of the second sealing element 32 has a second clearance hole 323 communicating with the hollow cylinder. The second clearance hole 323 exposes the hollow structure of the hollow cylinder, so that external airflow can enter the hollow cylinder through the second clearance hole 323 to carry out the atomized aerosol.

[0094] In some embodiments of this application, the portion of the outer arc surface of the hollow cylinder covered by the seal 3 is defined as the sealing surface. In this embodiment, the annular sidewall of the seal 3 is specifically sandwiched between the sealing surface of the hollow cylinder and the annular inner sidewall 11a; the annular sidewall is cylindrical and fits against the sealing surface of the hollow cylinder.

[0095] In one specific embodiment, the outer arc surface at the top of the hollow cylinder forms a first sealing surface, and the outer arc surface at the bottom of the hollow cylinder forms a second sealing surface. The first annular sidewall 311 of the first sealing member 31 is specifically sandwiched between the first sealing surface and the annular inner sidewall 11a. The second annular sidewall 321 of the second sealing member 32 is specifically sandwiched between the second sealing surface and the annular inner sidewall 11a.

[0096] In some embodiments, the cylindricity tolerance of at least the sealing surface of the hollow cylinder is less than or equal to 0.05 mm. Specifically, the cylindricity tolerance of at least the first sealing surface and / or the second sealing surface of the hollow cylinder is less than or equal to 0.05 mm.

[0097] In one specific embodiment, the cylindricity tolerance of the entire outer arc surface of the hollow cylinder is less than or equal to 0.05 mm.

[0098] The cylindricity tolerance of the outer arc surface of a hollow cylinder can be measured using a dial indicator and V-blocks. When measuring the cylindricity tolerance of the outer arc surface of a hollow cylinder using a dial indicator and V-blocks, the form tolerance is mainly evaluated by measuring the radial runout of the cylindrical surface. The following combines... Figure 4This paper introduces a specific method for measuring the cylindricity tolerance of the outer arc surface of a hollow cylinder using a Mitutoyo ID-C125XB cylindricity tester. Figure 4 This is a schematic diagram illustrating the measurement of the cylindricity of a workpiece using a dial indicator and a V-block, as provided in an embodiment of this application. The specific measurement method is as follows:

[0099] First, measurement steps

[0100] 1.1 Installing the workpiece

[0101] Place the hollow cylinder on the V-block, ensuring that the axis of the hollow cylinder is parallel to the V-block. The angle of the V-block is typically 90° or 120°, depending on the size of the hollow cylinder and the measurement requirements.

[0102] 1.2 Measuring radial runout

[0103] Make the probe of the dial indicator perpendicular to the cylindrical surface of the hollow cylinder;

[0104] Slowly rotate the hollow cylinder along its circumferential direction and record the readings of the dial indicator at each measuring point; the measuring points are usually evenly distributed along the axial and circumferential directions of the hollow cylinder.

[0105] 1.3 Recording Data

[0106] Select multiple cross-sections (usually at least 3) along the axial direction of the hollow cylinder along the BB direction. On each cross-section, measure multiple points (usually at least 4 points) evenly along the circumference of the hollow cylinder. Record the dial gauge reading corresponding to each measurement point.

[0107] Second, data processing

[0108] After the measurement is completed, the data needs to be processed to calculate the cylindricity tolerance; the specific calculation steps are as follows:

[0109] 2.1 Calculate the roundness tolerance of each cross section

[0110] For each cross section, calculate the difference between the maximum and minimum values ​​of the dial gauge readings at all measurement points; this difference represents the roundness tolerance of that cross section.

[0111] Formula: Roundness tolerance = Maximum reading - Minimum reading

[0112] 2.2 Determining Cylindricity Tolerance

[0113] Cylindricity tolerance is the maximum value among all the roundness tolerances corresponding to all cross sections.

[0114] Cylindricity tolerance = max(Cylindricity tolerance of each cross section).

[0115] The following is an example illustrating the specific calculation method for cylindricity tolerance.

[0116] Assuming three cross-sections along the BB direction were measured along the axial direction of the hollow cylinder, with four points measured at each cross-section, the corresponding data from the dial indicator are as follows:

[0117]

[0118] The cylindricity tolerance of the hollow cylinder is the maximum value of the roundness error of each cross-section. As shown in the table above, in this example, the cylindricity tolerance of the hollow cylinder is 0.05 mm.

[0119] Of course, in some other specific embodiments, the cylindricity tolerance of the inner arc surface of the hollow cylinder may also be less than or equal to 0.05 mm.

[0120] It should be noted that the cylindricity tolerance of the inner arc surface of a hollow cylinder refers to the maximum roundness tolerance among all cross-sections along the BB direction of the inner arc surface along its axial direction; the cylindricity tolerance of the outer arc surface of a hollow cylinder refers to the maximum roundness tolerance among all cross-sections along the BB direction of the outer arc surface along its axial direction. Specifically, the roundness tolerance for each BB direction cross-section refers to the difference between the maximum and minimum dial indicator readings at all measuring points corresponding to that cross-section.

[0121] Cylindricity tolerance refers to the deviation of the inner or outer arc surface of a hollow cylinder from the ideal arc. This deviation may be a bulge or depression of the arc surface, or it may be a deformation of the entire arc. Due to the limitations of the co-sintering production process, the cylindricity tolerance of the inner or outer arc surface of the porous ceramic substrate 21 of the hollow cylinder actually prepared is usually large. In this application, by improving the preparation process of the atomizing core 2, the cylindricity tolerance of the inner or outer arc surface of the porous ceramic substrate 21 of the hollow cylinder of the atomizing core 2 is less than or equal to 0.05 mm. For details, please refer to the preparation process description below.

[0122] The above-described solution, by ensuring that the cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm, makes the outer shape of the porous ceramic substrate 21 more regular. When the sealing element 3 is used for sealing in the atomizer, the gap between the sealing element 3 and the outer edge of the porous ceramic substrate 21 is smaller, and the fit between the sealing element 3 and the outer arc surface of the porous ceramic substrate 21 is higher, thereby effectively reducing the risk of leakage. Moreover, by ensuring that the cylindricity tolerance of the inner arc surface of the hollow cylinder is less than or equal to 0.05 mm, the distance between the heating element 22 and the inner arc surface of the hollow cylinder is more uniform, allowing the heating element 22 to heat evenly.

[0123] In some embodiments, the outer arc surface of the hollow cylinder blocks the liquid outlet 12, and the atomizing medium in the liquid storage chamber 11 directly enters the hollow cylinder through the liquid outlet 12, so as to be guided to the heating element 22 for atomization through the hollow cylinder.

[0124] In some embodiments, the outer arc surface of the hollow cylinder of the atomizing core 2 is directly exposed inside the liquid storage chamber 11. That is, the hollow cylinder is not wrapped with a cotton wick. This allows the heat generated by the heating element 22 to be better transferred to the side of the hollow cylinder away from the heating element 22, preheating the atomizing medium and reducing its viscosity, flow resistance, and ensuring sufficient liquid supply to the hollow cylinder. Simultaneously, it prevents waste of atomizing medium due to some of it remaining inside the cotton wick and failing to atomize. Furthermore, it prevents the cotton wick from obscuring the hollow cylinder, allowing consumers to judge the true state inside the atomizing core 2 through the atomizing core 2, thus improving the user experience.

[0125] In some embodiments, the porosity of the porous ceramic substrate 21 is greater than or equal to 50% and less than or equal to 80%; for example, the porosity can be 50%, 55%, 60%, 70%, or 80%. The porous ceramic substrate 21 within this porosity range has certain liquid conductivity, which can improve the liquid supply effect to the heating element 22; moreover, the pore structure of the porous ceramic substrate 21 can adsorb certain dirt (such as soot) in its pore structure, reducing the impact of dirt on the heating element 22.

[0126] Combination Figure 3 The thickness W of the hollow cylinder is 0.5-3mm; for example, the thickness W of the hollow cylinder can be 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, etc. The specific materials of the hollow cylinder can include silicon dioxide, alumina, silicon carbide, zirconium oxide, and mullite.

[0127] In some embodiments, see Figure 5 , Figure 5This is a vertical cross-sectional view of a hollow cylinder provided in an embodiment of this application; the side wall of the hollow cylinder has a mounting hole 211; along the axial direction Y of the hollow cylinder, the mounting hole 211 extends from the first end of the hollow cylinder to the second end.

[0128] Combination Figure 3 The heating element 22 includes a heating section 221, a first lead 222, and a second lead 223. The heating section 221 is disposed on the inner arc surface of the hollow cylinder; a porous covering layer 23 covers the heating section 221. The heating section 221 can be a metal coil, which can be spirally wound around the inner arc surface of the hollow cylinder. Alternatively, the heating section 221 can be a metal mesh, such as an arc-shaped or cylindrical metal mesh. The porous covering layer 23 covers the entire heating section 221.

[0129] A first lead 222 is connected to one end of the heating element 221 and extends from the first end to the second end of the hollow cylinder through a mounting hole 211. A second lead 223 is connected to the other end of the heating element 221 and extends towards the second end of the hollow cylinder. The first lead 222 and the second lead 223 extend both ends of the heating element 221 out of the hollow cylinder for electrical connection to the power supply assembly. For example, the heating element 221 may be a spiral coil, and the entire heating element 22 may be formed by winding a single metal wire.

[0130] In some embodiments, the porous covering layer 23 is made of ceramic, and the porous covering layer 23 fills the gaps in the heating element 221 and is connected to the inner arc surface of the hollow cylinder. Specifically, the material of the porous covering layer 23 may include silicon dioxide, alumina, silicon carbide, zirconium oxide, or mullite.

[0131] In some embodiments, the porosity of the porous capping layer 23 is greater than or equal to 30% and less than or equal to 80%; for example, the porosity may be 30%, 40%, 50%, 55%, 60%, 70%, or 80%. The thickness of the porous capping layer 23 is 10-200 μm; for example, the thickness of the porous capping layer 23 may be 10 μm, 40 μm, 70 μm, 100 μm, 130 μm, 160 μm, 190 μm, 200 μm, etc.

[0132] The atomizing core 2 provided in this embodiment includes a porous ceramic substrate 21, a heating element 22, and a porous covering layer 23. The porous ceramic substrate 21 is a hollow cylinder. At least a portion of the heating element 22 is disposed on the inner arc surface of the hollow cylinder. The porous covering layer 23 is disposed on the inner arc surface of the hollow cylinder and covers at least a portion of the heating element 22. By making the cylindricity tolerance of the outer arc surface of the hollow cylinder less than or equal to 0.05 mm, the outer shape of the porous ceramic substrate 21 is relatively regular. When the atomizer is sealed with a sealing element 3, the gap between the sealing element 3 and the outer arc surface of the porous ceramic substrate 21 is small, and the fit between the sealing element 3 and the outer arc surface of the porous ceramic substrate 21 is high, thereby effectively reducing the risk of leakage. Furthermore, by ensuring that the cylindricity tolerance of the inner arc surface of the hollow cylinder is less than or equal to 0.05 mm, the atomizing core 2 can make the distance between the heating element 22 and the inner arc surface of the hollow cylinder more uniform, allowing the heating element 22 to heat evenly.

[0133] In some embodiments, see Figure 6 , Figure 6 This is a flowchart of a method for preparing an atomizing core 2 according to an embodiment of this application. The method includes:

[0134] Step S1: Provide a porous ceramic substrate; the porous ceramic substrate is a ceramic substrate; the porous ceramic substrate is a hollow cylinder, and the cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm;

[0135] Step S2: At least a portion of the heating element is disposed on the inner arc surface of the hollow cylinder;

[0136] Step S3: A prefabricated layer is formed on the inner arc surface of the hollow cylinder to form a prefabricated component; the prefabricated layer covers at least part of the heating element;

[0137] Step S4: Sintering preforms.

[0138] In step S1, it should be noted that "cooked porcelain" refers to ceramics that have been sintered and shaped.

[0139] Existing cylindrical ceramic atomizing cores are usually formed by integral co-sintering, that is, a metal heating element is placed on the inner surface of a hollow cylindrical ceramic green body, a cover layer green body is covered on the metal heating element, and then the double-layer green body structure holding the metal heating element is sintered together.

[0140] The inventors of this application discovered that ceramics shrink significantly during sintering, while the heating element 22 experiences virtually no shrinkage. If the ceramic substrate and heating element 22 are sintered integrally, uneven shrinkage during ceramic sintering will occur, causing deformation of the porous ceramic substrate 21. This results in increased cylindricity tolerances on the inner and / or outer arc surfaces of the porous ceramic substrate 21. Furthermore, different porous ceramic substrates 21 may have different cylindricity tolerances, making it difficult to standardize the production of sealing elements 3 that match the surface roundness of the porous ceramic substrate 21. Gaps can easily form between the sealing element 3 and the porous ceramic substrate 21, leading to leakage. Therefore, in this embodiment, the porous ceramic substrate 21 is first sintered to form a ceramic porous ceramic substrate 21.

[0141] First, the porous ceramic substrate 21, excluding the heating element 22 and the porous covering layer 23, is sintered separately. The shrinkage of the porous ceramic substrate 21 during the sintering process is relatively uniform. The cylindricity tolerance of the inner and outer arc surfaces of the final sintered porous ceramic substrate 21 is less than or equal to 0.05 mm, that is, the shape of the inner and outer arc surfaces of the sintered porous ceramic substrate 21 is relatively regular. Moreover, since the porous ceramic substrate 21 is sintered ceramic, it will not undergo deformation in the subsequent sintering step S4.

[0142] In some embodiments, it may be combined with Figure 5 The porous ceramic substrate 21 is a hollow cylinder, and the sidewall of the hollow cylinder has mounting holes 211. Along the axial direction Y of the hollow cylinder, the mounting holes 211 extend from the first end to the second end. For example, a drilling machine with a suitable drill bit can be used to create the mounting holes 211 on the sidewall of the porous ceramic substrate 21 through a drilling process. First sintering the porous ceramic substrate 21 to form the mature ceramic substrate, and then creating the mounting holes 211, can reduce the complexity of the process.

[0143] See Figure 7 , Figure 7 This is a schematic diagram of a structure in which a heating element 22 is disposed on a porous ceramic substrate 21, according to an embodiment of this application.

[0144] In step S2, in some embodiments, the heating element 22 includes a heating section 221, a first lead 222, and a second lead 223; see above for details. Step S2 specifically includes:

[0145] Step S21: The heating part 221 of the heating element 22 is disposed on the inner arc surface.

[0146] The heating element 221 can be spirally fitted onto the inner arc surface of the hollow cylinder.

[0147] Step S22: Extend the first lead 222 of the heating element 22 from the first end of the hollow cylinder to the second end through the mounting hole 211.

[0148] The second lead 223 of the heating element 22 extends from the inner arc surface of the hollow cylinder to the outside of the hollow cylinder, and extends in the same direction as the first lead 222.

[0149] In step S3, the prefabricated layer covers the heating element 221.

[0150] See Figure 8 and Figure 9 The diagram below shows the structural details of step S3 provided in one embodiment of this application. In some embodiments, step S3 includes:

[0151] like Figure 8 As shown, step S31: fill the hollow cylinder with adhesive slurry 231.

[0152] In practice, the adhesive slurry 231 can be injected into the hollow cylinder from the bottom using a needle until its level is flush with the top. Injecting the slurry 231 from the bottom causes the air inside the cylinder to flow towards the top under the pressure of the slurry 231 and then out of the cylinder. This prevents the slurry 231 from trapping the gas and thus reduces the risk of insufficient slurry. However, if the slurry 231 is injected from the top, to prevent it from flowing out through the bottom, the cylinder is typically placed on a platform or its bottom is blocked by other structures. This can lead to difficulty in escaping the gas inside the cylinder during injection, as the slurry 231 can trap the gas, resulting in insufficient slurry.

[0153] Of course, the needle can also inject the adhesive slurry 231 into the hollow cylinder from the top until the liquid level of the adhesive slurry 231 is flush with the top of the hollow cylinder. Among these methods, using... Figure 8 Taking the indicated orientation as an example, the bottom of the hollow cylinder is... Figure 8 The adhesive slurry 231 is injected from the bottom up into the lower end of the hollow cylinder.

[0154] The adhesive slurry 231 includes, but is not limited to, one or more of alumina, silicon oxide, silicon carbide, zirconium oxide, glass powder, and pore-forming agent.

[0155] Step S32: Dry the adhesive slurry 231 to form a dried body.

[0156] The hollow cylinder, heating element 22, and slurry can be placed together in a drying oven for drying. The drying temperature range can be 50°C-150°C; preferably, the drying temperature can be 60°C-80°C. For example, the drying temperature can be 50°C, 60°C, 70°C, 80°C, 100°C, 120°C, or 150°C. The drying time range can be 15 min-8 H; preferably, the drying time can be 1 H-4 H. For example, the drying time can be 15 min, 30 min, 1 H, 1.5 H, 2 H, 2.5 H, 3 H, 3.5 H, 4 H, 5 H, 6 H, 7 H, or 8 H.

[0157] like Figure 9 As shown, step S33: A through hole 232 is opened on the dried body so that the remaining part of the dried body forms a prefabricated layer.

[0158] In some embodiments, a drilling machine and a drill bit adapted to the inner hole of the heating element 22 can be used to remove excess dried material by drilling, thereby forming a preform layer in the hollow cylinder. This preform layer is the green blank of the porous cover layer 23 covering the heating element 22 mentioned above, which is subsequently sintered to form the porous cover layer 23. The thickness of the preform layer is 0.2mm-0.6mm; for example, 0.2mm, 0.3mm, 0.4mm, 0.5mm or 0.6mm.

[0159] See Figures 10 to 12 This is a schematic diagram showing the specific process of step S3 provided in another embodiment of this application; step S3 includes:

[0160] like Figure 10 As shown, step S31': Set a support column 4 inside the hollow cylinder.

[0161] A support column 4 is placed inside a hollow cylinder, and the support column 4 can be spaced apart from the inner arc surface of the hollow cylinder at every position along its circumferential direction. The diameter of the support column 4 can be selected according to the desired thickness of the prefabricated layer. The interval between the outer arc surface of the support column 4 and the inner arc surface of the porous ceramic substrate 21 is the thickness of the prefabricated layer.

[0162] like Figure 11 As shown, step S32': fill the hollow cylinder with adhesive slurry 231.

[0163] The difference from step S31 provided in the above embodiment is that: adhesive slurry 231 is injected into the gap between the hollow cylinder and the support column 4 using a needle until the adhesive slurry 231 is flush with the top of the hollow cylinder.

[0164] Step S33': Dry the adhesive slurry 231 to form a precast layer.

[0165] The specific implementation of step S33' can be similar to that of step S32.

[0166] Step S34': Remove support column 4. The structure after removing support column 4 is the same as... Figure 9 similar.

[0167] Step S4: Sintering preforms.

[0168] In the specific implementation process, the preforms can be placed in a sintering furnace for sintering. The temperature range inside the sintering furnace can be 400-1100℃; for example, the temperature inside the sintering furnace can be 400℃, 600℃, 800℃, 1000℃, or 1100℃. The holding time inside the sintering furnace can be 10min-4H; for example, the holding time can be 10min, 30min, 1H, 1.5H, 2H, 2.5H, 3H, 3.5H, or 4H.

[0169] The atomizing core preparation method provided in this embodiment involves first sintering a porous ceramic substrate 21 to form a mature ceramic porous ceramic substrate 21, and then placing at least a portion of the heating element 22 on the inner arc surface of a hollow cylinder; subsequently, a preform is formed by setting a preform on the inner arc surface of the hollow cylinder, and the preform covers at least a portion of the heating element 22; finally, the preform is sintered as a whole to obtain the atomizing core 2. In the atomizing core 2 prepared by this method, the cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm. When the atomizing core 2 is applied to an atomizer, and the atomizer is sealed with a sealing element 3, the gap between the sealing element 3 and the outer arc surface of the porous ceramic substrate 21 is small, and the fit between the sealing element 3 and the outer arc surface of the porous ceramic substrate 21 is high, thereby effectively reducing the risk of leakage; moreover, the regularly shaped porous ceramic substrate 21 does not require a cotton core to be wrapped around it, effectively avoiding various problems caused by wrapping a cotton core around the porous ceramic substrate 21. Furthermore, the atomizing core 2 prepared by this method has a cylindricity tolerance of less than or equal to 0.05 mm on the outer arc surface of the hollow cylinder, and a porous ceramic substrate 21 with a regular inner arc surface, which makes the distance between the heating element 22 and the inner arc surface of the hollow cylinder more uniform, allowing the heating element 22 to be heated evenly. In addition, this method uses a low-shrinkage bonding slurry 231 and a hollow cylinder of high-regularity calcined ceramic, and achieves calcined ceramic bonding through a slurry injection and perforation process, solving the problem of hollow cylinder deformation. Moreover, the sintering temperature of the heating element 22 is relatively low, eliminating the need for a hydrogen reduction process to reduce the oxidation of the heating element 22, resulting in lower energy consumption costs. In addition, the atomization efficiency of the heating element 22 can be improved by sintering the bonding slurry 231 to form a pre-fabricated layer.

[0170] The following are specific embodiments of the preparation method of the atomizing core 2 provided in this application.

[0171] Example 1

[0172] A porous ceramic substrate 21 is provided. The heating element 221 of the heating element 22 is disposed on the inner arc surface of the hollow cylinder. The first lead 222 of the heating element 22 extends from the first end to the second end of the hollow cylinder through the mounting hole 211. An adhesive slurry 231, composed of silicon carbide, glass powder, and a pore-forming agent, is injected into the hollow cylinder from the bottom using a needle until the surface of the adhesive slurry 231 is flush with the top of the hollow cylinder. The hollow cylinder, the heating element 22, and the slurry are placed together in a drying oven for drying. The drying temperature is 100℃, and the drying time is 5 hours. Using a drilling machine and a drill bit adapted to the inner hole of the heating element 22, excess dried material is removed by drilling to form a 0.4mm thick preform layer within the hollow cylinder, resulting in a preform. The preform is then placed in a sintering furnace for sintering. The temperature inside the sintering furnace was 800℃; the holding time inside the sintering furnace was 150 minutes, resulting in the atomizing core. A physical image of the atomizing core 2 obtained through this experiment can be found here. Figure 12 , Figure 12 This is a physical image of the atomizing core 2 prepared by the experimental group of this application.

[0173] Depend on Figure 12 It can be seen that the outer circumference of the atomizing core 2 obtained in Example 1 is relatively regular, and the cylindricity tolerance of the outer arc surface of the hollow cylinder is small.

[0174] Example 2

[0175] The difference from Example 1 above is that the drying temperature is 120°C; the drying time is 3 hours; the temperature inside the sintering furnace is 650°C; and the holding time inside the sintering furnace is 180 minutes.

[0176] Example 3

[0177] The difference from Example 1 above is that the drying temperature is 80°C; the drying time is 7 hours; the temperature inside the sintering furnace is 900°C; and the holding time inside the sintering furnace is 120 minutes.

[0178] Among them, the structure of the atomizing core 2 prepared by Example 2 and Example 3 is similar to Figure 12 Similarly, the outer circumference of the atomizer core 2 is relatively regular, and the cylindricity tolerance of the outer arc surface of the hollow cylinder is relatively small.

[0179] Comparative Example

[0180] Unlike the experimental group described above, the porous ceramic substrate 21 was not sintered before the heating element 22 was placed; that is, the heating element 22 was directly placed on the green body in this comparative example. The structure of the atomizing core 2 prepared in this experiment can be found in [reference needed]. Figure 13 , Figure 13This is a photograph of the atomizing core 2 prepared in proportion to a single sample according to this application. Figure 13 It can be seen that the atomizing core prepared by this comparative example has an irregular outer circumference of the hollow cylinder, that is, the cylindricity tolerance of the outer arc surface of the hollow cylinder is large.

[0181] Will Figure 12 and Figure 13 The comparison shows that, compared to the comparative example, the atomizing core 2 obtained in Example 1 has a more regular outer circumference, and the cylindricity tolerance of the outer arc surface of the hollow cylinder of the atomizing core 2 is smaller. The above-described method for preparing the atomizing core 2 of this application can produce an atomizing core 2 with a more regular shape.

[0182] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. An atomizing core, characterized in that, include: Porous ceramic matrix; The porous ceramic matrix is ​​a hollow cylinder; The heating element is at least partially disposed on the inner arc surface of the hollow cylinder; A porous covering layer is disposed on the inner arc surface of the hollow cylinder and covers at least part of the heating element; The cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm.

2. The atomizing core according to claim 1, characterized in that, The hollow cylinder has mounting holes on its sidewalls; along the axial direction of the hollow cylinder, the mounting holes extend from a first end to a second end of the hollow cylinder; the heating element includes: A heating element is disposed on the inner arc surface of the hollow cylinder; the porous covering layer covers the heating element. The first lead wire is connected to one end of the heating element and extends from the first end of the hollow cylinder to the second end through the mounting hole; The second lead is connected to the other end of the heating element.

3. The atomizing core according to claim 2, characterized in that, The heating element is a metal coil or a metal mesh.

4. The atomizing core according to claim 3, characterized in that, The porous covering layer is made of ceramic and fills the gaps in the heating element and is connected to the inner arc surface.

5. The atomizing core according to any one of claims 1-4, characterized in that, The porous ceramic matrix has a thickness of 0.5-3 mm and a porosity of 50%-80%; and / or The thickness of the porous capping layer is 10µm-200µm and the porosity is 30%-80%.

6. A method of manufacturing an atomizing core, characterized by, include: A porous ceramic substrate is provided; the porous ceramic substrate is a calcined ceramic; the porous ceramic substrate is a hollow cylinder, and the cylindricity tolerance of the outer arc surface of the hollow cylinder is less than or equal to 0.05 mm; At least a portion of the heating element is disposed on the inner arc surface of the hollow cylinder; A prefabricated layer is provided on the inner arc surface of the hollow cylinder to form a prefabricated component; the prefabricated layer covers at least a portion of the heating element; The preform is sintered.

7. The method for preparing the atomizing core according to claim 6, characterized in that, The hollow cylinder has mounting holes on its sidewalls; along the axial direction of the hollow cylinder, the mounting holes extend from a first end to a second end of the hollow cylinder; wherein, the step of at least partially disposing the heating element on the inner arc surface of the hollow cylinder specifically includes: The heating element is positioned on the inner arc surface; The first lead of the heating element extends from the first end of the hollow cylinder to the second end through the mounting hole.

8. The method for preparing the atomizing core according to claim 6, characterized in that, The step of forming a prefabricated component by setting a prefabricated layer on the inner arc surface of the hollow cylinder specifically includes: The hollow cylinder is filled with adhesive slurry; The adhesive slurry is dried to form a dried body; Through holes are made in the dried body so that the remaining part of the dried body forms the preform layer.

9. The method for preparing the atomizing core according to claim 6, characterized in that, The step of forming a preform on the inner arc surface of the hollow cylinder specifically includes: A support column is provided inside the hollow cylinder; The hollow cylinder is filled with adhesive slurry; The adhesive slurry is dried to form the precast layer; Remove the support column.

10. The method for preparing the atomizing core according to claim 8 or 9, characterized in that, The adhesive slurry includes one or more of alumina, silicon oxide, silicon carbide, zirconium oxide, and glass powder.

11. The method for preparing the atomizing core according to any one of claims 6-9, characterized in that, In the step of sintering the preform, the sintering temperature is 400-1100℃ and the holding time is 10min-4H.

12. An atomizing core characterized by, It is prepared by the preparation method according to any one of claims 6-11.

13. An atomiser characterised in that, include: The shell has a liquid storage compartment; the liquid storage compartment has a liquid outlet. The atomizing core is disposed within the housing; A sealing element is disposed between the outer arc surface of the hollow cylinder and the shell; Wherein, the atomizing core is the atomizing core as described in any one of claims 1-5 and 12, and the outer arc surface of the hollow cylinder blocks the liquid outlet.

14. The atomizer according to claim 13, characterized in that, The outer arc surface of the hollow cylinder is directly exposed inside the liquid storage chamber.

15. The atomizer according to claim 14, characterized in that, The liquid storage chamber has an annular inner sidewall and an annular outer sidewall spaced apart. The annular inner sidewall is cylindrical and has the liquid outlet. The atomizing core is sleeved inside the annular inner sidewall. The sealing element includes an annular sidewall, which is sandwiched between the outer arc surface of the hollow cylinder and the annular inner sidewall. The annular sidewall is cylindrical and fits against the outer arc surface of the hollow cylinder.

16. The atomizer according to claim 15, characterized in that, The number of the seals is two, defined as a first seal and a second seal; wherein... The first sealing element includes a first annular sidewall and a top wall connected to the first annular sidewall; the first annular sidewall is sandwiched between the outer arc surface of the top end of the hollow cylinder and the annular inner sidewall; the top wall is disposed on the end face of the top end of the hollow cylinder and has a first clearance hole communicating with the hollow cylinder. The second sealing element includes a second annular sidewall and a bottom wall connected to the second annular sidewall; the second annular sidewall is sandwiched between the outer arc surface of the bottom end of the hollow cylinder and the inner annular sidewall; the bottom wall is disposed on the end face of the bottom end of the hollow cylinder and has a second clearance hole communicating with the hollow cylinder.

17. An atomiser characterised in that, include: The shell has a liquid storage compartment; The liquid storage tank has a liquid outlet; An atomizing core is disposed within the housing; wherein the atomizing core comprises: Porous ceramic matrix; the porous ceramic matrix is ​​a hollow cylinder; The heating element is at least partially disposed on the inner arc surface of the hollow cylinder; A porous covering layer is disposed on the inner arc surface of the hollow cylinder and covers at least part of the heating element; A sealing element is disposed between the outer arc surface of the hollow cylinder and the shell; Wherein, the portion of the outer arc surface of the hollow cylinder covered by the sealing element is defined as the sealing surface, and the cylindricity tolerance of at least the sealing surface of the hollow cylinder is less than or equal to 0.05 mm.

18. The atomizer according to claim 17, characterized in that, The liquid storage chamber has an annular inner sidewall and an annular outer sidewall spaced apart. The annular inner sidewall is cylindrical and has the liquid outlet. The atomizing core is sleeved inside the annular inner sidewall, and the outer arc surface of the hollow cylinder is directly exposed to the liquid storage chamber through the liquid outlet. The sealing element includes an annular sidewall, which is sandwiched between the sealing surface of the hollow cylinder and the annular inner sidewall. The annular sidewall is cylindrical and fits against the sealing surface of the hollow cylinder.

19. The atomizer according to claim 18, characterized in that, The number of sealing elements is two, defined as a first sealing element and a second sealing element; the outer arc surface at the top of the hollow cylinder forms a first sealing surface, and the outer arc surface at the bottom of the hollow cylinder forms a second sealing surface; wherein... The first sealing element includes a first annular sidewall and a top wall connected to the first annular sidewall; the first annular sidewall is sandwiched between the first sealing surface and the annular inner sidewall; the top wall is disposed on the end face of the top of the hollow cylinder and has a first clearance hole communicating with the hollow cylinder; The second sealing element includes a second annular sidewall and a bottom wall connected to the second annular sidewall; the second annular sidewall is sandwiched between the second sealing surface and the annular inner sidewall; the bottom wall is disposed on the end face of the bottom end of the hollow cylinder and has a second clearance hole communicating with the hollow cylinder.

20. An electronic atomizing device, characterized by, include: The atomizer as described in any one of claims 13-19; A power supply assembly for controlling the atomizer.

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