WO2024032143A1

WO2024032143A1 - Heating element, atomization core, atomizer, and electronic atomization device

Info

Publication number: WO2024032143A1
Application number: PCT/CN2023/100125
Authority: WO
Inventors: 张钊; 林浩; 王丽波; 罗洪梁; 肖从文
Original assignee: 深圳麦克韦尔科技有限公司
Priority date: 2022-08-09
Filing date: 2023-06-14
Publication date: 2024-02-15
Also published as: CN115606864A

Abstract

The present application relates to a heating element, an atomization core, an atomizer, and an electronic atomization device. In the heating element (100), the surface of a second heating layer (20) away from a first heating layer (10) can be connected to a porous base (40), and a liquid atomization matrix can permeate into the second heating layer (20), such that atomization is more sufficient. In addition, the first heating layer (10) can prevent the liquid atomization matrix from penetrating through the second heating layer (20), and can prevent the liquid atomization matrix from overflowing from the surface of the second heating layer (20) in contact with the first heating layer (10), thereby avoiding the problems of liquid explosion and liquid burst of the liquid atomization matrix on the second heating layer (20), and improving the user experience.

Description

Heating elements, atomizer cores, atomizers and electronic atomization devices

cross reference

This application cites Chinese patent application No. 202210952227.0 titled "Heating Element, Atomization Core, Atomizer and Electronic Atomization Device" submitted on August 9, 2022, which is fully incorporated into this application by reference.

Technical field

The present application relates to the technical field of atomization devices, and in particular to a heating element, an atomization core, an atomizer and an electronic atomization device.

Background technique

Currently, in the heating element structure used in an atomizer, a heating element is usually attached to a porous substrate, and the heating element is used to generate the energy required for atomization.

During use, in order to make the atomization more complete and the liquid supply effect better, the heating element can also use a porous heating element with a pore structure. The pore structure can increase the atomization surface and realize the liquid conduction and liquid storage function, thereby producing a larger The amount of smoke is reduced, and the atomization temperature field is more uniform.

However, the large number of penetrating pore structures also prevents the liquid atomization matrix inside from being atomized, resulting in the phenomenon of liquid explosion and collapse, which seriously affects the user's experience during use.

Contents of the invention

According to various embodiments of the present application, a heating element, an atomization core, an atomizer and an electronic atomization device are provided.

In a first aspect, the present application provides a heating element, including a stacked first heating layer and a second heating layer. The porosity and pore density of the first heating layer are both smaller than that of the second heating layer.

In some embodiments, the first heat-generating layer has a porosity of approximately 0% to 30%.

In some embodiments, the second heat-generating layer has a porosity of about 30% to 70%.

In some embodiments, a plurality of first micropores are opened in the second heat-generating layer along its thickness direction.

In some embodiments, the second heat-generating layer is a metal heat-generating layer.

In some embodiments, the material of the first heating layer includes at least one of a metallic material and a ceramic material.

In some embodiments, a plurality of second micropores are opened on the first heating layer along its thickness direction, and each second micropore is connected to at least part of the first micropores.

In some embodiments, the heating element includes a filler, and the filler is filled in each second micropore that is connected to the first micropore.

In some embodiments, the first heating layer is a metal heating layer, and the filler material includes metal materials and ceramic materials. at least one of them.

In some embodiments, the filler has a thermal conductivity greater than or equal to 10 W/(m·K).

In some embodiments, the filler material includes one or more of aluminum oxide, boron nitride, and silicon carbide.

In a second aspect, the present application provides an atomization core, which includes a porous base and a heating element as described above. The heating element is stacked on at least one surface of the porous base.

In a third aspect, the present application provides an atomizer, including the atomizing core as described above.

In a fourth aspect, the present application provides an electronic atomization device, including a power supply component and an atomizer as described above. The power supply component is used to supply power to the atomizer.

In the above-mentioned heating element, atomization core, atomizer and electronic atomization device, the surface of the second heating layer in the heating element facing away from the first heating layer can be connected to the porous matrix in the atomizer, and the liquid atomization in the atomizer The matrix can penetrate into the second heating layer to achieve the effect of increasing the atomization surface, making the atomization more complete to generate a larger amount of smoke, and making the atomization temperature field more sufficient; on this basis, the first heating layer It can prevent the liquid atomization matrix from penetrating the second heating layer and preventing the liquid atomization matrix from seeping out from the contact surface between the second heating layer and the first heating layer. Therefore, it can avoid the liquid atomization matrix from exploding on the second heating layer. Liquid and collapse problems can be solved, thereby effectively improving the user experience.

The above description is only an overview of the technical solutions of the present application. In order to have a clearer understanding of the technical means of the present application, they can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable. , the specific implementation methods of the present application are specifically listed below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for the purpose of illustrating the embodiments and are not to be considered as limitations of the application. Also, the same parts are represented by the same reference numerals throughout the drawings. In the attached picture:

Figure 1 is a schematic structural diagram of a heating element according to one embodiment of the present application;

Figure 2 is a schematic structural diagram of a heating element according to another embodiment of the present application;

Figure 3 is a physical diagram of a heating element with a through-hole structure in the prior art;

Figure 4 is a physical diagram of the heating element in an embodiment of the present application;

Figure 5 is a partial enlarged view of position A of the heating element of the embodiment in Figure 4;

Figure 6 is an A-A cross-sectional view of the heating element of the embodiment in Figure 4;

Figure 7 is a physical diagram of the heating element in another embodiment of the present application;

Figure 8 is a partial enlarged view of position B of the heating element in the embodiment of Figure 7;

FIG. 9 is a B-B cross-sectional view of the heating element of the embodiment in FIG. 7 .

100. Heating element; 10. First heating layer; 20. Second heating layer; 30. Filler; 40. Porous matrix; 11. Second micropores; 21. First micropores; a. Thickness direction.

Detailed ways

The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and are therefore only used as examples and cannot be used to limit the protection scope of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the technical field belonging to this application; the terms used herein are for the purpose of describing specific embodiments only and are not intended to be used in Limitation of this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

In the description of the embodiments of this application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity or specificity of the indicated technical features. Sequence or priority relationship. In the description of the embodiments of this application, "plurality" means two or more, unless otherwise explicitly and specifically limited.

Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of this application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to It is more than two pieces (including two pieces).

In the description of the embodiments of this application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right" and "vertical" The orientation or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the embodiments of the present application and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the implementation of the present application. Example limitations.

In the description of the embodiments of this application, unless otherwise clearly stated and limited, technical terms such as "installation", "connection", "connection" and "fixing" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. It can be disassembled and connected, or integrated; it can also be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

It should be noted that in the traditional atomizer heating element structure, a heating element is attached to a porous matrix, and the heating element can generate the energy required for atomization. With the further development of atomizers, in order to improve the preheating effect of the heating element on the smoke liquid and make the atomization more complete, a solution has emerged in which the heating element uses a porous heating element with a pore structure. The pore structure of the heating element makes the heating element It has a larger atomization surface and can realize liquid conduction and liquid storage functions, thereby producing a larger amount of smoke and making the atomization temperature field more uniform.

As shown in Figure 3, when the porosity of the heating element is high, the inventor noticed that the atomizer using the above structure It is easy to produce a large amount of explosive sound during use, which seriously affects the user's experience during use.

After in-depth research, the inventor found that when the heating element is attached to the porous substrate, the pore structure of the heating element has a large number of through holes, which are through holes that penetrate at least two surfaces. The liquid atomization matrix inside the atomizer can enter the interior of the heating element through the through hole and be quickly directed to the surface of the heating element. Under the high temperature of the heating element, the temperature of the liquid atomization matrix close to the inner wall of the through hole changes rapidly. The temperature of the liquid atomization matrix located in the central area of the through hole changes slowly because it is far away from the inner wall of the through hole. As a result, part of the liquid atomization matrix in the through hole has no time to atomize, resulting in the phenomenon of liquid explosion and liquid collapse. Another reason is that during the rapid heating process of the heating element, due to the rapid expansion of the volume of the internal liquid atomization matrix, the liquid atomization matrix is quickly squeezed to the outer surface of the heating element to form a thick liquid film. On the one hand, the existence of a thick liquid film hinders the escape and formation of internal aerosols; on the other hand, vacuoles will form and burst rapidly, causing an explosion.

In addition, due to the penetration arrangement of the through holes, the liquid atomization matrix in the through holes can be directly transmitted through the through holes, but the temperature of part of the liquid atomization matrix directly transmitted through the through holes is low, which is not conducive to full atomization.

Based on this, in order to solve the problem of liquid explosion and collapse when the atomizer is used, the present application provides a heating element, which can connect the side of the second heating layer away from the first heating layer in the heating element with the porous matrix. By connecting, the liquid atomization matrix in the atomizer can penetrate into the second heating layer, thereby increasing the atomization surface and achieving the effects of full atomization, rapid liquid conduction and liquid storage. On this basis, the first heating layer can prevent the liquid atomization matrix in the second heating layer from penetrating the second heating layer, thereby preventing the liquid atomization matrix from being on the side surface of the second heating layer that contacts the first heating layer. The phenomenon of liquid explosion and collapse is produced to improve the user experience.

Referring to Figure 1, an embodiment of the present invention provides a heating element 100, which includes a stacked first heating layer 10 and a second heating layer 20, wherein the porosity and pore density of the first heating layer 10 are smaller than those of the second heating layer 10. Heating layer 20.

It should be noted that porosity refers to the ratio of the pore volume of a porous material to the total volume of the material. In this application, the porosity of the first heating layer 10 refers to the ratio of the pore volume of the first heating layer 10 to the total volume of the first heating layer 10 . Similarly, the porosity of the second heating layer 20 refers to the ratio of the pore volume of the second heating layer 20 to the total volume of the second heating layer 20 . Therefore, in the present invention, the porosity of the first heating layer 10 is smaller than the porosity of the second heating layer 20 , which has the advantage of reducing the amount of liquid stored in the pores of the first heating layer 10 and avoiding excessive liquid storage during the heating process. The liquid flows to its atomized surface, reducing the thickness of the oil film. In addition, the above-mentioned pores are based on the microscopic perspective of the first heating layer 10 and the second heating layer 20 , that is, the pore diameter unit of the pores on the first heating layer 10 and the second heating layer 20 is micron level. For example, the pore diameter range can be set to 1μm-50μm.

The pore density refers to the average number of pores per unit volume of the first heating layer 10 or the second heating layer 20 . Therefore, if the pore density of the first heating layer 10 is smaller than the pore density of the second heating layer 20 , it means that the distribution of pores on the first heating layer 10 is relatively sparse, while the distribution of pores on the second heating layer 20 is relatively dense.

Therefore, when the above-mentioned heating element 100 is used in an atomizer, the side of the second heating layer 20 facing away from the first heating layer 10 can be connected to the porous base of the atomizer, that is, the side of the second heating layer 20 facing away from the first heating layer 10 can be connected to the porous base of the atomizer. The surface of layer 10 is attached to the porous substrate.

During use of the atomizer, the liquid atomization matrix can penetrate into the surface of the porous substrate, and part of the liquid atomization matrix penetrates into the interior of the second heating layer 20 through the pores in the second heating layer 20 . As a result, the contact area between the liquid atomization matrix and the heating element 100 is larger, and the atomization surface is larger, thereby making the atomization more complete.

On this basis, the liquid atomization matrix inside the second heating layer 20 is blocked by the first heating layer 10 inside the heating element 100 to prevent the liquid atomization matrix from seeping out of the second heating layer 20 . This can prevent the liquid atomization matrix from exploding or collapsing on the surface of the second heating layer 20 , effectively improving the user experience during use.

This application improves the structure of the heating element 100, which has a simple structure and strong operability. It can effectively solve the problems of liquid explosion and liquid collapse on the basis of ensuring sufficient atomization, and improve the user's experience during use.

In some embodiments, the porosity of the first heating layer 10 is about 0% to 30%, and the porosity of the second heating layer 20 is about 30% to 70%.

When the porosity of the first heating layer 10 is 0 or approaches 0, the first heating layer 10 is constructed as a dense film layer. At this time, the first heating layer 10 can react with the liquid in the pores of the second heating layer 20 The atomized matrix plays a blocking role, which can prevent the liquid atomized matrix from exploding or collapsing on the surface of the second heating layer 20, effectively improving the user's experience during use.

It can be understood that when the porosity of the first heating layer 10 is not equal to 0, the porosity of the first heating layer 10 is between 0% and 30%. The liquid atomization matrix in the pores of the second heating layer 20 usually has a certain viscosity. Therefore, although the porosity of the first heating layer 10 is not 0, the fine pores on the first heating layer 10 can still affect the second heating layer 20 . The liquid atomization matrix in the pores of the heating layer 20 plays a certain blocking role. The specific porosity of the first heating layer 10 can be adjusted according to actual factors such as the viscosity of the liquid atomization matrix and the capacity of the liquid atomization matrix in the pores of the second heating layer 20, so that the first heating layer 10 can The liquid atomization matrix in the pores of the heating layer 20 plays a good blocking role and will not be described in detail here.

In some embodiments, a plurality of first micropores 21 are formed on the second heat-generating layer 20 along its thickness direction. The first micropores 21 can be used to store the liquid atomization matrix that penetrates from the porous matrix into the second heating layer 20 , and can also play a certain role in conducting liquid for the liquid atomization matrix in the second heating layer 20 .

When the liquid atomization matrix penetrates from the porous matrix into each first micropore 21, the contact area between the liquid atomization matrix and the second heating layer 20 is larger, that is, the atomization surface is larger, thereby generating a larger amount of smoke. , and make the atomization temperature field more uniform.

In some embodiments, the second heat-generating layer 20 is a metal heat-generating layer. That is, the second heating layer 20 is made of metal material. Specifically, the second heating layer 20 can be made of, but is not limited to, nickel alloy or nickel-iron alloy. The second heating layer 20 is made of metal, which can improve the heat conduction effect of the second heating layer 20 to the liquid atomization matrix inside. In some embodiments, the material of the first heating layer 10 includes at least one of a metallic material and a ceramic material.

When the porosity of the first heat-generating layer 10 is equal to 0 or approaches 0, that is, the first heat-generating layer 10 is configured as a dense film layer. At this time, the first heating layer 10 may be made of, but is not limited to, metals such as nickel alloy or nickel-iron alloy. The first heating layer 10 may also be made of, but is not limited to, high thermal conductive ceramics such as aluminum oxide or boron nitride. Specifically, the specific material formula of the first heating layer 10 can be adjusted according to the actual heat conduction, oil supply and other effects, and will not be described in detail here.

In some embodiments, a plurality of second micropores 11 are opened on the first heating layer 10 along its thickness direction, and each second micropore is The hole 11 is connected with at least part of the first micropores 21 .

When the porosity of the first heating layer 10 is not equal to 0, a plurality of second micropores 11 can be opened on the first heating layer 10 along its thickness direction. When the first heat-generating layer 10 is stacked on the second heat-generating layer 20, the second micropores 11 are connected with at least part of the first micropores 21.

In some embodiments, the heating element 100 includes a filler 30 filled in each second micropore 11 that is connected to the first micropore 21 .

When the second micropores 11 are opened in the first heat-generating layer 10 , the first micropores 11 connected with each second micropore 11 are filled with the filler 30 . As a result, the first micropores 11 on the first heat-generating layer 10 are sealed. When the first heating layer 10 is stacked on the second heating layer 20 , the end connecting the first micropore 11 and the second micropore 21 is sealed, so that the first heating layer 10 can react with the liquid in the first micropore 11 The atomized matrix plays a good blocking role, preventing the liquid atomized matrix from exploding or collapsing on the surface of the second heating layer 20, effectively improving the user's experience during use.

In some embodiments, the first heating layer 10 is a metal heating layer, and the material of the filler 30 includes at least one of a metal material and a ceramic material.

When the second micropores 11 are opened in the first heating layer 10, the first heating layer 10 can be made of, but is not limited to, nickel alloy or nickel-iron alloy. At the same time, the composition of the filler 30 may include a highly thermally conductive metal material different from the first heat-generating layer 10 , such as aluminum oxide. Of course, the components of the filler 30 may also include high melting point ceramic slurry such as silicon carbide or boron oxide.

In some embodiments, the thermal conductivity of the filler 30 is greater than or equal to 10 W/(m·K). Preferably, the thermal conductivity of the filler 30 can be set to 30W/(m·K)-300W/(m·K). As a result, the filler 30 has a high thermal conductivity effect, thereby making the atomization temperature field more evenly distributed and making the atomization more complete.

In some embodiments, the material of the filler 30 includes one or more of aluminum oxide, boron nitride, and silicon carbide. As a result, the thermal conductivity of the filler 30 can be effectively improved.

Please refer to FIG. 1 . Specifically, in Embodiment 1 of the present application, a plurality of first micropores 21 are opened on the second heating layer 20 along its thickness direction, and the porosity is 30% to 70%. The porosity of the first heating layer 10 is equal to 0 or approaches 0, that is, the first heating layer 10 is constructed as a dense film layer.

Further, the second heat-generating layer 20 is configured as a metal heat-generating layer. At the same time, the first heating layer 10 is made of metal such as nickel alloy or nickel-iron alloy as a dense film layer, and is stacked on the second heating layer 20 to achieve a blocking effect on the liquid atomization matrix in the first micropores 21 .

In the first embodiment, the raw material slurry of the first heating layer 10 can be covered on the second heating layer 20 by silk printing, and then sintered to form, so that the first heating layer 10 can be formed on the second heating layer 20 A dense film layer is formed on one side to block one end of the first micropore 21 .

In addition, the first heat-generating layer 10 can also be formed into a cast film so that it is closely attached to one side of the second heat-generating layer 20 . Specifically, first, the first heat-generating layer 10 is formed into a cast film and is laser cut. After laser cutting The first heating layer 10 is attached to one side of the second heating layer 20, and the stacked first heating layer 10 and the second heating layer 20 are sintered to tightly connect them. Therefore, one end of the first micropore 21 is effectively blocked by the first heat-generating layer 10 .

Please continue to refer to FIG. 1 . In the second embodiment of the present application, a plurality of first micropores 21 are opened on the second heating layer 20 along its thickness direction, and the porosity is 30% to 70%. The porosity of the first heating layer 10 is equal to 0 or approaches 0, that is, the first heating layer 10 is constructed as a dense film layer.

Further, the second heat-generating layer 20 is configured as a metal heat-generating layer. At the same time, the first heating layer 10 is constructed as a dense film layer using highly thermally conductive ceramic materials such as aluminum oxide or boron nitride, and is stacked on the second heating layer 20 to atomize the liquid in the first micropores 21 The blocking effect of the matrix.

In the second embodiment, the first heating layer 10 can be covered on the second heating layer 20 by silk screen printing, so that the first heating layer 10 forms a dense film layer on one side of the second heating layer 20. To block one end of the first microhole 21 .

In addition, the first heat-generating layer 10 can also be formed into a cast film so that it is closely attached to one side of the second heat-generating layer 20 . Specifically, first, the first heat-generating layer 10 is formed into a cast film and is laser cut. The laser-cut first heating layer 10 is bonded to one side of the second heating layer 20 , and the stacked first heating layer 10 and the second heating layer 20 are sintered to tightly connect them. Therefore, one end of the first micropore 21 is effectively blocked by the first heat-generating layer 10 .

In the above-mentioned Embodiment 1 and Embodiment 2, the first heating layer 10 is configured as a dense film layer. Specifically, as shown in Figure 4, Figure 4 is a physical diagram of the heating element in one embodiment of the present application. Among them, FIG. 5 shows a partial enlarged view of position A in FIG. 4. It can be seen from FIG. 5 that the first heating layer 10 located on the uppermost layer is constructed as a dense film layer. Therefore, the first heat-generating layer 10 can cover the second heat-generating layer 20 and block one end of each first micropore 21 in the second heat-generating layer 20 .

Further, FIG. 6 shows a cross-sectional view along the A-A direction in FIG. 4. As shown in FIG. 6, when the second heating layer 20 is covered with a dense film layer, the interior of the second heating layer 20 still maintains a porous state. . As a result, the liquid atomization matrix enters the second heat-generating layer 20 from the first micropores 21, so that the contact area between the liquid atomization matrix and the second heat-generating layer 20 is larger, that is, the atomization surface is larger, so that more heat can be generated. Large amount of smoke, and make the atomization temperature field more uniform. The end of the first micropore 21 facing away from the porous matrix 40 is sealed by the first heating layer 10 to prevent the liquid atomization matrix in the first micropore 21 from causing liquid explosion or collapse on the surface of the second heating layer 20, which is effective. Improve user experience when using.

Please refer to Figure 2. In the third embodiment of the present application, a plurality of first micropores 21 are opened on the second heating layer 20 along its thickness direction, and the porosity is 30% to 70%. The first heating layer 10 has a plurality of second micropores 11 penetrating along its thickness direction, and each second micropore 11 is connected to at least part of the first micropores 21 .

Further, the second heat-generating layer 20 is configured as a metal heat-generating layer. At the same time, the first heating layer 10 is made of metal materials such as nickel alloy or nickel-iron alloy, and fillers 30 are filled in each second micropore 11 on the first heating layer 10 . Alumina may be added to the components of the filler 30 , and the volume proportion of aluminum oxide in the filler 30 is 10%-30%. Therefore, when the filler 30 is filled in each second micropore 11 on the first heating layer 10, the heat dissipation effect of the first heating layer 10 can be effectively improved, the atomization temperature field distribution is more uniform, and the atomization is more precise. for fullness.

In the third embodiment, the filler 30 can be coated on the side surface of the first heating layer 10 away from the second heating layer 20 using silk screen printing, and vacuum suction can be used to remove the first heating layer 10 . The filler 30 on the surface of the layer 10 is adsorbed into the second micropores 11 so that the second micropores 11 are sealed to block the liquid atomized matrix in the first micropores 21 that are connected to the second micropores 11 .

Specifically, when the filler 30 is vacuum-suctioned, the depth of the filler 30 penetrating into the second micropores 11 can be controlled by controlling the particle size adjustment of the filler 30 and the vacuum negative pressure, thereby adjusting the filler 30 The degree of sealing of the first heating layer 10 achieves effective sealing of one end of the first micropore 21 .

Please continue to refer to Figure 2. In Embodiment 4 of the present application, a plurality of first micropores 21 are opened on the second heating layer 20 along its thickness direction, and the porosity is 30% to 70%. The first heating layer 10 has a plurality of second micropores 11 penetrating along its thickness direction, and each second micropore 11 is connected to at least part of the first micropores 21 .

Further, the second heat-generating layer 20 is configured as a metal heat-generating layer. At the same time, the first heating layer 10 is made of metal materials such as nickel alloy or nickel-iron alloy, and fillers 30 are filled in each second micropore 11 on the first heating layer 10 . Among the components of the filler 30 , high melting point ceramic slurry such as silicon carbide or boron oxide may be added.

In the above-mentioned Embodiment 3 and Embodiment 4, a plurality of second micropores 11 are opened through the first heat-generating layer 10 , and the filler 30 is used to seal and fill each second micropore 11 . Specifically, as shown in Figure 7, Figure 7 is a physical diagram of a heating element in another embodiment of the present application. Among them, FIG. 8 shows a partial enlarged view of B in FIG. 7. It can be seen from FIG. The second micropore 11. During the filling process, the sealing degree of the filler 30 in each second micropore 11 can be controlled according to the requirement for the final porosity of the first heating layer 10 . Compared with the porosity of the first heating layer 10 in Embodiment 1 and Embodiment 2, the porosity of the first heating layer 10 in Embodiment 3 and Embodiment 4 is larger, and the porosity is between 0 and 30%. between.

Therefore, as shown in FIG. 9 , after the filler 30 is sealed and filled in each first micropore 11 , the first heating layer 10 is covered on the second heating layer 20 , so that the first heating layer 10 can respond to the second heating layer 20 . One end of each first micropore 21 in the heating layer 20 plays a blocking role. At the same time, the interior of the second heating layer 20 also maintains a porous state, and the liquid atomization matrix enters the second heating layer 20 from the first micropores 21, making the contact area between the liquid atomization matrix and the second heating layer 20 larger. ,Right now The atomization surface is larger, which can produce a larger amount of smoke and make the atomization temperature field more uniform. The end of the first micropore 21 facing away from the porous matrix 40 is sealed by the first heating layer 10 and the filler 30 in each second micropore 11 to prevent the liquid atomized matrix in the first micropore 21 from flowing into the second heating layer 20 The phenomenon of liquid explosion and collapse occurs on the surface, which effectively improves the user experience when using it.

Based on the same concept as the above-mentioned heating element 100, this application provides an atomization core, which includes a porous base 40 and the above-mentioned heating element 100. Wherein, the heating element 100 is stacked on at least one surface of the porous base 40 . The porous matrix 40 may be at least one of porous ceramics, porous glass, porous metal, porous carbon materials or porous polymer materials. In some specific embodiments, the porous matrix 40 may be a porous ceramic matrix.

Specifically, the side surface of the second heating layer 20 in the heating element 100 facing away from the first heating layer 10 is stacked on at least one surface of the porous base 40 so that the liquid atomization matrix in the porous base 40 can pass through the second heating layer 10 . Each first micropore 21 in the heat-generating layer 20 enters the second heat-generating layer 20, thereby increasing the contact area between the liquid atomization matrix and the second heat-generating layer 20, that is, increasing the atomization surface, making the atomization more complete.

Furthermore, the liquid atomization matrix in the second heating layer 20 is blocked by the first heating layer 10 inside the heating element 100, preventing the liquid atomization matrix from forming an explosion or collapse phenomenon on the surface of the heating element 100, thereby effectively improving the mist The performance of the chemical converter.

Based on the same concept as the above-mentioned atomization core, this application provides an atomizer, including the above-mentioned atomization core.

Based on the same concept as the above-mentioned atomizer, this application provides an electronic atomization device, including a power supply component and the above-mentioned atomizer. Among them, the power component is used to supply power to the atomizer.

When used in this application, the first heating layer 10 is stacked on one side of the second heating layer 20 so that one end of the heating element 100 along its thickness direction is sealed and the other end is open. When the open end of the heating element 100 is connected to the porous matrix 40, the liquid atomized matrix penetrates into the surface of the porous matrix 40, and part of the liquid atomized matrix enters the heating element 100 through the pores in the second heating layer 20, and is absorbed by the first The heat-generating layer 10 is blocked in the second heat-generating layer 20 .

This not only increases the contact area between the liquid atomization matrix and the heating element 100 and the atomization surface, but also prevents the liquid atomization matrix from exploding or collapsing on the surface of the heating element 100, thereby improving the atomizer. The experience when using it.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application. The scope shall be covered by the claims and description of this application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any way. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A heating element includes a stacked first heating layer and a second heating layer. The porosity and pore density of the first heating layer are smaller than those of the second heating layer.
The heating element according to claim 1, wherein the first heating layer has a porosity of approximately 0% to 30%.
The heating element according to claim 1 or 2, wherein the second heating layer has a porosity of approximately 30% to 70%.
The heating element according to any one of claims 1 to 3, wherein a plurality of first micropores are formed on the second heating layer along its thickness direction.
The heating element according to any one of claims 1 to 4, wherein the second heating layer is a metal heating layer.
The heating element according to any one of claims 1 to 5, wherein the material of the first heating layer includes at least one of a metallic material and a ceramic material.
The heating element according to any one of claims 1 to 6, wherein the first heating layer is provided with a plurality of second micropores along its thickness direction, and each of the second micropores is connected to at least part of the first Micropores are connected.
The heating element according to claim 7, wherein the heating element includes a filler, and the filler is filled in each of the second micropores connected to the first micropores.
The heating element according to claim 8, wherein the first heating layer is a metal heating layer, and the filler material includes at least one of a metal material and a ceramic material.
The heating element according to claim 8 or 9, wherein the thermal conductivity of the filler is greater than or equal to 10 W/(m·K).
The heating element according to any one of claims 8 to 10, wherein the filler material includes one or more of aluminum oxide, boron nitride, and silicon carbide.
An atomization core includes a porous base and the heating element according to any one of claims 1 to 11, the heating element is stacked on at least one surface of the porous base.
An atomizer, comprising the atomizing core as claimed in claim 12.
An electronic atomization device includes a power supply component and the atomizer according to claim 13, and the power supply component is used to supply power to the atomizer.