Heating body, atomizer and electronic atomization device

Abstract

Disclosed in the present application are a heating body, an atomizer and an electronic atomization device. The heating body comprises a porous ceramic substrate and a heating element, wherein the porous ceramic substrate comprises a first partial substrate and a second partial substrate; the pore size and / or porosity of the first partial substrate are / is greater than the pore size and / or porosity of the second partial substrate; and the heating element is at least partially arranged on a surface of the first partial substrate. The liquid supply and atomization capacity for the heating element is increased, scale accumulation is reduced, and the structural strength of the heating body is maintained.

Description

Heating element, atomizer, electronic atomization device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority based on Chinese patent application 202410181786.5 filed on February 18, 2024, and all of its contents are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of atomization technology, and in particular to a heating element, an atomizer, and an electronic atomization device. Background Art

[0004] The heating element is the core structural component of the electronic atomization device, and the performance of the heating element affects the performance of the electronic atomization device.

[0005] The heating body usually includes a porous ceramic matrix and a heating element. The liquid supply capacity of the porous ceramic matrix to the heating element affects the atomization capacity of the heating body. Summary of the Invention

[0006] The heating element, atomizer, and electronic atomization device provided in this application improve the liquid supply capacity of the heating element while maintaining the strength of the heating element.

[0007] In order to solve the above technical problems, the first technical solution provided in this application is: providing a heating body, including: a porous ceramic substrate and a heating element; the porous ceramic substrate includes a first part substrate and a second part substrate; the pore size and / or porosity of the first part substrate is greater than the pore size and / or porosity of the second part substrate; the heating element is at least partially arranged on the surface of the first part substrate.

[0008] In one embodiment, the second substrate includes an atomized surface, and the first substrate is provided on the atomized surface; the raw material of the first substrate includes ceramic material and glass phase material, and the raw material of the second substrate includes ceramic material.

[0009] In one embodiment, the ceramic material comprises diatomaceous earth and the glassy phase material comprises an alkaline oxide.

[0010] In one embodiment, the glassy phase material includes at least one of Na2O, SiO2, CaO, BaO, and Al2O3.

[0011] In one embodiment, the glass phase material includes 20-50 parts of Na2O, 10-40 parts of SiO2, 5-20 parts of CaO, 5-20 parts of BaO, and 5-20 parts of Al2O3 by mass.

[0012] In one embodiment, the raw material of the first portion of the matrix and the raw material of the second portion of the matrix are co-fired to form the porous ceramic matrix.

[0013] In one embodiment, the orthographic projection of the heating element on the porous ceramic substrate is completely located within the first portion of the substrate.

[0014] In one embodiment, the first portion of the substrate only covers a portion of the atomizing surface; and the shape of the first portion of the substrate matches the shape of the heating element.

[0015] In one embodiment, a vertical distance between an edge line of an orthographic projection of the heating element on the first partial base and an edge line of the first partial base is 0.1 mm-0.5 mm.

[0016] In one embodiment, the thickness of the first substrate is 0.1 mm to 0.5 mm.

[0017] In one embodiment, the pore size of the first matrix is ​​27 μm-33 μm.

[0018] In one embodiment, the porosity of the first matrix is ​​57%-63%.

[0019] In one embodiment, the pore size of the second matrix is ​​22 μm-28 μm.

[0020] In one embodiment, the porosity of the second matrix is ​​52%-58%.

[0021] In order to solve the above technical problems, the second technical solution provided in this application is: providing a nebulizer, comprising a liquid storage chamber and a heating element; the heating element is configured to atomize the aerosol-generating matrix in the liquid storage chamber; the heating element is the heating element described in any one of the above items.

[0022] In order to solve the above technical problems, the third technical solution provided in this application is: to provide an electronic atomization device, including an atomizer and a host; the atomizer is the atomizer described above; the host is configured to control the operation of the atomizer.

[0023] The beneficial effects of this application are as follows: Different from the prior art, this application discloses a heating element, an atomizer, and an electronic atomization device; the heating element includes a porous ceramic substrate and a heating element; the porous ceramic substrate includes a first substrate portion and a second substrate portion; the pore size and / or porosity of the first substrate portion is greater than the pore size and / or porosity of the second substrate portion; the heating element is at least partially disposed on the surface of the first substrate portion. By disposing the heating element on the surface of the first substrate portion with a larger pore size and / or porosity, the liquid supply capacity of the porous ceramic substrate to the heating element is improved, scaling and accumulation are reduced, and the structural strength of the porous ceramic substrate is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] FIG1 is a schematic structural diagram of an electronic atomization device provided in an embodiment of the present application;

[0026] FIG2 is a schematic structural diagram of an atomizer of the electronic atomization device provided in FIG1 ;

[0027] FIG3 is a schematic structural diagram of a heating element provided in an embodiment of the present application;

[0028] FIG4 is a schematic top view of the porous ceramic substrate shown in FIG3 ;

[0029] FIG5 is a morphological structure diagram of a heating element provided in an embodiment of the present application;

[0030] FIG6 is an enlarged structural diagram of area A shown in FIG5 ;

[0031] FIG7 is a schematic flow chart of a method for preparing a heating element according to an embodiment of the present application;

[0032] FIG8 is a schematic structural flow diagram of the method shown in FIG7 ;

[0033] FIG9 is a comparison diagram of the heating element provided in the embodiment of the present application and the heating element in the prior art;

[0034] FIG10 is a comparison diagram of scaling of the heating element provided by the embodiment of the present application and the heating element in the prior art after 300 suctions;

[0035] FIG11 is a comparison diagram of the wetting effects of the heating element provided in the embodiment of the present application and the heating element in the prior art at atomization 0s, atomization 1s, atomization 2s, and 1s after atomization stops. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0038] The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. The terms "including" and "having" in the embodiments of this application and any variations thereof are intended to cover non-exclusive inclusions. 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 that are not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor do they constitute independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0041] As atomization progresses, scaling on the surface of the heating element will affect the taste and lifespan. Especially in the high-capacity market, the taste consistency and lifespan of the heating element are more demanding.

[0042] In order to reduce scaling, a commonly used method is to increase the pore size and porosity of the porous matrix of the heating element, but this will reduce the strength of the heating element.

[0043] In view of this, the present application provides a heating element, an atomizer, and an electronic atomization device to improve the liquid atomization capability and reduce scaling while maintaining the structural strength of the heating element. The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0044] Please refer to FIG1 , which is a schematic structural diagram of an electronic atomization device provided in an embodiment of the present application.

[0045] In this embodiment, an electronic atomization device 100 is provided. The electronic atomization device 100 can be used to atomize an aerosol-generating substrate. The electronic atomization device 100 includes an atomizer 1 and a host 2 electrically connected to each other.

[0046] The atomizer 1 is used to store an aerosol-generating substrate and atomize it to form an aerosol for inhalation by a user. The atomizer 1 can be used in various fields, such as medical treatment, cosmetics, and recreational smoking. In one embodiment, the atomizer 1 can be used in an electronic aerosolization device to atomize the aerosol-generating substrate and generate an aerosol for inhalation by a user. The following embodiments use this recreational smoking method as an example.

[0047] The specific structure and function of the atomizer 1 can refer to the specific structure and function of the atomizer 1 involved in the following embodiments, and the same or similar technical effects can be achieved, so they will not be repeated here.

[0048] The main unit 2 includes a battery (not shown) and a controller (not shown). The battery is used to provide electrical energy for the operation of the nebulizer 1, enabling the nebulizer 1 to atomize the aerosol-generating matrix to form an aerosol; the controller is used to control the operation of the nebulizer 1. The main unit 2 also includes other components such as a battery holder and an airflow sensor.

[0049] The atomizer 1 and the host 2 can be integrated or detachably connected, and can be designed according to specific needs.

[0050] Please refer to FIG2 , which is a schematic structural diagram of the atomizer of the electronic atomization device provided in FIG1 .

[0051] The atomizer 1 includes a shell 10, a heating element 11, and an atomizer seat 12. The atomizer seat 12 has an installation cavity (not marked in the figure), and the heating element 11 is arranged in the installation cavity; the heating element 11 and the atomizer seat 12 are arranged in the shell 10 together. The shell 10 is formed with a mist outlet channel 13, and the inner surface of the shell 10, the outer surface of the mist outlet channel 13 and the top surface of the atomizer seat 12 cooperate to form a liquid storage cavity 14, and the liquid storage cavity 14 is used to store liquid aerosol generating matrix. Among them, the heating element 11 is electrically connected to the host 2, and the heating element 11 is configured to atomize the aerosol generating matrix in the liquid storage cavity 14 to generate aerosol. The specific structure of the heating element 11 can be found in the heating element 11 involved in the following embodiments.

[0052] The atomizing seat 12 includes an upper seat 121 and a lower seat 122. The upper seat 121 and the lower seat 122 cooperate to form a mounting cavity; the atomizing surface of the heating element 11 cooperates with the cavity wall of the mounting cavity to form the atomizing cavity 120. A lower liquid channel 1211 is provided on the upper seat 121; the aerosol-generating matrix in the liquid storage cavity 14 flows into the lower liquid channel 1211 through which the heating element 11 is fluidically connected to the liquid storage cavity 14. An air inlet channel 15 is provided on the lower seat 122. External air enters the atomizing cavity 120 through the air inlet channel 15, carrying the aerosol atomized by the heating element 11 to the mist outlet channel 13. The user inhales the aerosol through the port of the mist outlet channel 13.

[0053] Please refer to Figures 3 to 6. Figure 3 is a structural schematic diagram of the heating element provided in an embodiment of the present application. Figure 4 is a top view structural schematic diagram of an embodiment of the porous ceramic substrate shown in Figure 3. Figure 5 is a morphological structural diagram of the heating element provided in an embodiment of the present application. Figure 6 is an enlarged structural schematic diagram of the A area shown in Figure 5.

[0054] The heating element 11 includes a porous ceramic substrate 111 and a heating element 112. The porous ceramic substrate 111 comprises a first substrate portion 1111 and a second substrate portion 1112. The pore size and / or porosity of the first substrate portion 1111 are greater than those of the second substrate portion 1112. The heating element 112 is at least partially disposed on the surface of the first substrate portion 1111; the heating element 112 is used to heat the atomized aerosol-generating substrate to generate aerosol.

[0055] Since the heating element 112 is at least partially disposed on the surface of the first partial substrate 1111, the pore size and / or porosity of the first partial substrate 1111 is relatively large. By utilizing the pore size / porosity difference between the first partial substrate 1111 and the second partial substrate 1112, the high pore size and porosity below the heating area are conducive to improving the liquid supply and heat dissipation effect in this area, accelerating the efficiency of liquid supply from the surrounding area to the heating area, improving the liquid atomization ability of the heating element 112, and reducing scale accumulation. At the same time, the second partial substrate 1112 is the stress-bearing area for the assembly of the heating element 11, and the second partial substrate 1112 still maintains high strength, reducing the risk of damage due to the overall strength difference of the heating element 11.

[0056] In one embodiment, the second substrate 1112 includes an atomizing surface 111a. The first substrate 1112 is disposed on the atomizing surface 111a. The first and second substrates 1111 and 1112 are configured to guide the aerosol-generating matrix through capillary action. The first substrate 1111 is made of a ceramic material and a glassy material. The second substrate 1112 is also made of a ceramic material.

[0057] Optionally, the raw material of the first part of the matrix 1111 and the raw material of the second part of the matrix 1112 are co-fired to form the porous ceramic matrix 111 .

[0058] It should be noted that the porous ceramic matrix 111 has a plurality of disordered pores; specifically, the porous ceramic matrix 111 is formed by sintering a ceramic material to form a plurality of disordered pores, so that the porous ceramic matrix 111 has a capillary force, thereby realizing the function of guiding the aerosol to generate a matrix. One way to prepare the porous ceramic matrix 111 is: a ceramic material forms a ceramic embryo, and the surface of the ceramic embryo designed to atomize the aerosol to generate a matrix is ​​defined as an atomizing surface 111a, and a glass phase material is coated on the atomizing surface 111a, and the porous ceramic matrix 111 is formed after co-firing. The part of the atomizing surface 111a coated with the glass phase material, the ceramic material and the glass phase material interact to increase the pore size of the pores of this part of the ceramic embryo, and this part of the ceramic embryo is defined as the first part of the matrix 1111 after sintering, and the rest are the second part of the matrix 1112. The thickness of the first part of the matrix 1111 is less than the thickness of the ceramic embryo.

[0059] In addition, by adding glass phase material to the raw materials of the first part of the matrix 1111, the film-base bonding strength is improved and the flatness of the heating element 112 is improved.

[0060] In one embodiment, the ceramic material includes diatomaceous earth, and the glass phase material includes an alkaline oxide. Alkaline oxides generally refer to oxides that can only produce salts and water when reacting with acids. By utilizing the abundant Si-OH and other bond groups on the surface of diatomaceous earth, its surface becomes weakly acidic, and an alkaline glass slurry containing a large amount of alkaline oxides is formed on the surface of the diatomaceous earth. The diatomaceous earth reacts with the alkaline oxide to form calcium silicate and sodium silicate, which are separated from the diatomaceous earth substrate, achieving an etching effect, thereby achieving an increase in pore size and porosity, which is manifested as a further increase in the pore size of the etched area, forming a porous ceramic substrate 111 including a first part substrate 1111 and a second part substrate 1112, thereby improving the liquid supply effect in the corresponding area of ​​the heating element 112.

[0061] Optionally, the material of diatomaceous earth includes SiO2, Al2O3, Fe2O3, CaO, MgO, K2O, Na2O, P2O5 and organic matter.

[0062] Optionally, the glass phase material includes at least one of Na2O, SiO2, CaO, BaO, and Al2O3, and the glass phase material is alkaline, thereby achieving an etching effect on the ceramic material.

[0063] Optionally, the glass phase material includes 20-50 parts of Na2O, 10-40 parts of SiO2, 5-20 parts of CaO, 5-20 parts of BaO, and 5-20 parts of Al2O3 by mass, so that the glass material is alkaline.

[0064] The mass fraction of Na2O in the glassy phase material can be 20 parts by mass, 30 parts by mass, 40 parts by mass, 50 parts by mass, or a range consisting of any two of the aforementioned values, such as 20-30 parts by mass, 30-40 parts by mass, or a range consisting of any two of the aforementioned values, such as 10-30 parts by mass, 30-40 parts by mass, or a range consisting of any two of the aforementioned values, such as 10-30 parts by mass, 30-40 parts by mass, or a range consisting of any two of the aforementioned values, such as 5-15 parts by mass, 10-20 parts by mass, or a range consisting of any two of the aforementioned values, such as 5-15 parts by mass, 10-20 parts by mass, or a range consisting of any two of the aforementioned values, such as 10-15 parts by mass, 5-15 parts by mass, or a range consisting of any two of the aforementioned values, such as 5-15 parts by mass, or a range consisting of any two of the aforementioned values, such as 10-15 parts by mass, or ...10-15 parts by mass, or 10-15 parts by mass, or a range consisting of any two of the aforementioned values, such as 10-15 parts by mass, or 10 The mass fraction of Al2O3 in the glassy phase material can be 5 mass parts, 10 mass parts, 15 mass parts, 20 mass parts, etc., or a range consisting of any two of the above values, such as 10-15 weight parts, 5-15 weight parts, etc.

[0065] Optionally, the glass phase material includes 20%-50% Na2O, 10%-40% SiO2, 5%-20% CaO, 5%-20% BaO, and 5%-20% Al2O3 by mass, so that the glass phase material is alkaline.

[0066] In one embodiment, the orthographic projection of the heating element 112 on the porous ceramic substrate 111 is completely located within the first partial substrate 1111. The heating element 112 is completely disposed on the first partial substrate 1111, which can improve the flatness of the heating element 112 and enhance the resistance consistency of the heating element 112. For example, the heating element 112 can be formed by silk screen printing, and the heating element 112 is completely disposed on the first partial substrate 1111, which can improve the silk screen printing effect of the heating element 112.

[0067] In one embodiment, the first portion of the substrate 1111 covers the entire atomized surface 111 a ; in other words, during the preparation of the porous ceramic substrate 111 , the entire atomized surface 111 a of the ceramic blank is coated with the glass phase material.

[0068] In one embodiment, the first partial substrate 1111 only covers a portion of the atomized surface 111a, and the orthographic projection of the heating element 112 on the porous ceramic substrate 111 is completely located within the first partial substrate 1111. In other words, during the preparation of the porous ceramic substrate 111, a portion of the atomized surface 111a of the ceramic blank is coated with a glass phase material.

[0069] Optionally, the shape of the first substrate 1111 can be adapted to the shape of the heating element 112. For example, if the heating element 112 is in the shape of a meandering strip, the shape of the first substrate 1111 is also in the shape of a meandering strip (as shown in FIG4 ). For another example, if the heating element 112 is in the shape of a waist drum, the shape of the first substrate 1111 is also in the shape of a waist drum.

[0070] The orthographic projection of the heating element 112 on the first part of the substrate 1111 can coincide with the first part of the substrate 1111; or the vertical distance between the edge line of the orthographic projection of the heating element 112 on the first part of the substrate 1111 and the edge line of the first part of the substrate 1111 is 0.1mm-0.5mm. In other words, the line width of the first part of the substrate 1111 is greater than the line width of the heating element 112.

[0071] In one embodiment, the thickness of the first substrate 1111 is 0.1 mm to 0.5 mm. This thinness increases the liquid supply while minimizing the impact on the structural strength of the porous ceramic substrate 111, thereby maintaining the overall strength of the heating element 11. By utilizing the difference in pore size and porosity between the area below the heating element 112 and the surrounding area, the efficiency of liquid supply from the surrounding area to the heating area is increased.

[0072] In one embodiment, the pore size of the first matrix 1111 is 27 μm-33 μm, and the porosity of the first matrix 1111 is 57%-63%; and / or the pore size of the second matrix 1112 is 22 μm-28 μm, and the porosity of the second matrix 1112 is 52%-58%. It should be noted that the pore size and porosity can be confirmed by SEM imaging.

[0073] Please refer to Figures 7 and 8. Figure 7 is a schematic flow chart of the method for preparing a heating element provided in an embodiment of the present application, and Figure 8 is a schematic flow chart of the structure of the method shown in Figure 7.

[0074] The present application also provides a method for preparing a heating element, which can be used to prepare the heating element 11 provided in the above embodiment. The method for preparing the heating element specifically includes:

[0075] Step S01: forming a glass slurry layer on the atomized surface of the ceramic body.

[0076] In one embodiment, the ceramic body may be a sintered ceramic body; or an unsintered ceramic body, which is co-fired with the glass slurry layer and the heating slurry layer in step S03.

[0077] In one embodiment, the ceramic body comprises diatomaceous earth. The glass slurry layer comprises a glassy phase material, which comprises an alkaline oxide. The glass slurry layer further comprises a pore-forming agent, an organic carrier, and a solvent. The abundant Si-OH and other bond groups on the diatomaceous earth surface render the surface weakly acidic. This forms an alkaline glass slurry layer containing a large amount of alkaline oxides on the diatomaceous earth surface, achieving an etching effect manifested as a further increase in the pore size of the etched area, thereby forming a porous ceramic substrate 111 comprising a first substrate 1111 and a second substrate 1112.

[0078] Optionally, the alkaline oxide includes at least one of Na2O, SiO2, CaO, BaO, and Al2O3, thereby rendering the glass slurry layer alkaline and achieving an etching effect on the porous ceramic substrate. Alternatively, the pore-forming agent includes polystyrene spheres. Alternatively, the organic carrier includes at least one of ethyl cellulose, terpineol, and tributyl citrate; and / or the solvent includes at least one of terpineol and butyl carbitol acetate.

[0079] Optionally, the glass slurry layer includes 100 parts of glass phase material (when the glass phase material is composed of alkaline oxides, the glass slurry layer includes 100 parts of alkaline oxides, 30-60 parts of pore formers, 30-60 parts of organic carriers, and 20-60 parts of solvents, and / or the alkaline oxides include 20-50 parts of Na2O, 10-40 parts of SiO2, 5-20 parts of CaO, 5-20 parts of BaO, and 5-20 parts of Al2O3, by mass; and / or the organic carrier includes 20-40 parts of ethyl cellulose, 20-40 parts of pine alcohol, and 20-40 parts of tributyl citrate, by mass; and / or the solvent includes 80-90 parts of pine alcohol and 10-20 parts of butyl carbitol acetate, by mass.

[0080] In one embodiment, the thickness of the glass paste layer is 10-30 μm.

[0081] Step S02: forming a heat-generating slurry layer on the surface of the glass slurry layer away from the ceramic body.

[0082] The specific material, shape, resistance, etc. of the heating paste layer are designed according to needs as long as it can be heated and atomized.

[0083] Step S03: co-firing the glass paste layer and the heating paste layer.

[0084] After the glass paste layer is sintered, only inorganic components remain. The heating paste layer is sintered to form the heating element 112 of the heating body 11 of the above embodiment.

[0085] It should be noted that the etching depth of the glass slurry layer on the ceramic body can be adjusted by adjusting the composition, thickness, sintering temperature, and sintering time of the glass slurry layer. The etching depth can be 0.1mm-0.5mm, that is, the thickness of the first part of the base 1111 formed by etching is 0.1mm-0.5mm.

[0086] The method for preparing a heating element provided in the embodiment of the present application, and the heating element 11 formed therefrom, are simple in manner to improve the liquid supply efficiency, have a high degree of effect, and significantly improve product performance.

[0087] The present application also conducts an experimental comparison between the heating element 11 provided in the embodiment of the present application and the heating element in the prior art.

[0088] The raw material of the first part of the base 1111 of the heating element 11 provided in the embodiment of the present application includes a glass phase material; the material of the porous ceramic base of the heating element in the prior art does not include a glass phase material, as shown in Figure 9, which is a comparison diagram of the heating element provided in the embodiment of the present application and the heating element in the prior art. The heating element 11 provided in the embodiment of the present application and the heating element in the prior art are the same in specific configuration except for whether the raw material of the porous ceramic base includes a glass phase material.

[0089] The heating element 11 provided in the embodiment of the present application and the heating element in the prior art were tested using the same aerosol generation matrix (for example, aloe vera and grape fruit flavor) in the manner of puffing for 3 seconds and stopping for 8 seconds. The test results are shown in Table 1. The scaling comparison diagram after 300 puffs of cigarette smoke is shown in Figure 10, which is a scaling comparison diagram after 300 puffs of the heating element provided in the embodiment of the present application and the heating element in the prior art. And refer to Figure 11, which is a comparison diagram of the wetting effect of the heating element provided in the embodiment of the present application and the heating element in the prior art at atomization 0s, atomization 1s, atomization 2s, and 1s after atomization stops.

[0090] Table 1 Performance test

[0091] As shown in Table 1, the heating element 11 provided in the embodiment of the present application has a longer service life and a higher atomization volume. As shown in Figures 9 to 11, the heating element 11 provided in the embodiment of the present application can improve liquid supply efficiency, reduce scaling, extend service life, and improve atomization effect; at the same time, it has a better infiltration effect.

[0092] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heating element, wherein: include: A porous ceramic substrate comprises a first substrate portion and a second substrate portion; The pore size and / or porosity of the first matrix portion is greater than the pore size and / or porosity of the second matrix portion; The heating element is at least partially disposed on the surface of the first base.

2. The heating element according to claim 1, wherein The second part of the substrate includes an atomized surface, and the first part of the substrate is arranged on the atomized surface; the raw material of the first part of the substrate includes ceramic material and glass phase material, and the raw material of the second part of the substrate includes ceramic material.

3. The heating element according to claim 2, wherein The ceramic material includes diatomaceous earth, and the glassy phase material includes an alkaline oxide.

4. The heating element according to claim 2 or 3, wherein The glass phase material includes at least one of Na2O, SiO2, CaO, BaO, and Al2O3.

5. The heating element according to claim 4, wherein The glass phase material includes, by mass, 20-50 parts of Na2O, 10-40 parts of SiO2, 5-20 parts of CaO, 5-20 parts of BaO, and 5-20 parts of Al2O3.

6. The heating element according to any one of claims 2 to 5, wherein The raw material of the first part of the matrix and the raw material of the second part of the matrix are co-fired to form the porous ceramic matrix.

7. The heating element according to any one of claims 1 to 6, wherein The orthographic projection of the heating element on the porous ceramic substrate is completely located in the first partial substrate.

8. The heating element according to claim 7, wherein The first portion of the substrate only covers a portion of the atomized surface; The graphic shape of the first part of the base body is adapted to the graphic shape of the heating element.

9. The heating element according to claim 8, wherein A vertical distance between an edge line of an orthographic projection of the heating element on the first partial base and an edge line of the first partial base is 0.1 mm to 0.5 mm.

10. The heating element according to claim 1, wherein: The thickness of the first part of the base is 0.1 mm-0.5 mm.

11. The heating element according to any one of claims 1 to 10, wherein The pore size of the first part of the matrix is ​​27 μm-33 μm.

12. The heating element according to any one of claims 1 to 11, wherein The porosity of the first part of the matrix is ​​57%-63%.

13. The heating element according to any one of claims 1 to 12, wherein The pore size of the second part of the matrix is ​​22 μm-28 μm.

14. The heating element according to any one of claims 1 to 13, wherein The porosity of the second part of the matrix is ​​52%-58%.

15. An atomizer, wherein: include: Liquid storage chamber; a heating element configured to atomize the aerosol-generating matrix in the liquid storage chamber; The heating element is the heating element according to any one of claims 1 to 14.

16. An electronic atomization device, wherein: include: An atomizer, which is the atomizer according to claim 15; The host is configured to control the operation of the atomizer.

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