WO2023125850A1 - Heating body, atomizer, and electronic atomization device - Google Patents

Abstract

The present application discloses a heating body, an atomizer, and an electronic atomization device. The heating body comprises a dense base body which is integrally formed; the dense base body is provided with a liquid absorption surface and an atomization surface which are oppositely arranged; in the thickness direction of the dense base body, the dense base body is provided with a plurality of layers of micropore groups and a flow channel located in the dense base body; each layer of micropore group comprises a plurality of micropores, and the micropores extend in a direction from the liquid absorption surface to the atomization surface; the micropores of two adjacent layers of micropore groups are not aligned; the extension direction of the flow channel intersects the extension direction of the micropores, so that two adjacent layers of micropore groups are communicated by means of the flow channel. The micropores of two adjacent layers of micropore groups are not aligned, so that the local resistance of bubbles moving towards the liquid absorption surface is increased, and the moving speed of the bubbles to the liquid absorption surface is reduced; moreover, the flow channel induces the bubbles to flow in the flow channel, so that it is easy for the bubbles to be discharged from the atomization surface or induced to a non-atomization area, thereby reducing the influence of the bubbles on liquid supply, ensuring sufficient liquid supply, and avoiding a dry hit.

Description

Heating element, atomizer and electronic atomization device

Cross References to Related Applications

This application claims the international patent application PCT/CN2021/143267 filed on December 30, 2021, the international patent application PCT/CN2021/143260 filed on December 30, 2021, and the Chinese patent application 202211387650.7 filed on November 7, 2022 Priority rights, the entire contents of which are incorporated herein by reference.

technical field

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

Background technique

The electronic atomization device is composed of a heating element, a battery, and a control circuit. The heating element is the core component of the electronic atomization device, and its characteristics determine the atomization effect and user experience of the electronic atomization device.

A kind of existing heating element is a cotton core heating element. Most of the cotton core heating elements are spring-shaped metal heating wires wound around cotton rope or fiber rope. The liquid aerosol generating substrate to be atomized is absorbed by the two ends of the cotton rope or fiber rope, and then transported to the central metal heating wire for heating and atomization. Due to the limited area at the end of the cotton rope or fiber rope, the aerosol-generating matrix is adsorbed and the transmission efficiency is low, and there is a risk of dry burning caused by insufficient liquid supply.

Another kind of existing heating element is ceramic heating element. Most ceramic heating elements form a metal heating film on the surface of the porous ceramic body; the porous ceramic body plays the role of guiding and storing liquid, and the metal heating film realizes the heating and atomization of the liquid aerosol-generating substrate. However, it is difficult to precisely control the positional distribution and dimensional accuracy of micropores in porous ceramics prepared by high-temperature sintering. In order to reduce the risk of liquid leakage, it is necessary to reduce the pore size and porosity, but in order to achieve sufficient liquid supply, it is necessary to increase the pore size and porosity, which are contradictory. At present, under the conditions of pore size and porosity that meet the low risk of liquid leakage, the liquid conduction ability of the porous ceramic matrix is limited, and burnt smell will appear under high power conditions.

With the advancement of technology, users have higher and higher requirements for the atomization effect of electronic atomization devices. In order to meet the needs of users, a thin heating element is provided to improve the liquid supply capacity. However, the thin heating element tends to adhere to air bubbles on its liquid-absorbing surface during the atomization process, resulting in insufficient liquid supply and dry burning.

Contents of the invention

The heating element, atomizer and electronic atomization device provided by the present application solve the problem in the prior art that bubbles are easily adhered to the liquid-absorbing surface of the heating element, resulting in insufficient liquid supply.

In order to solve the above technical problems, the first technical solution provided by this application is to provide a heating element, which is applied to an electronic atomization device and is used to atomize an aerosol-generating substrate, including an integrally formed dense substrate with oppositely arranged Liquid-absorbing surface and atomizing surface; along the thickness direction of the dense matrix, the dense matrix is provided with multi-layer micropore groups and flow channels inside the dense matrix; each layer of micropore groups includes multiple micropores, the micropores extend along the direction from the liquid-absorbing surface to the atomization surface; the micropores of the micropore groups of two adjacent layers are non-aligned; the extension of the flow channel The direction intersects with the extending direction of the micropores, so that two adjacent layers of the micropore groups communicate through the flow channel.

In one embodiment, along the direction from the liquid-absorbing surface to the atomizing surface, the capillary action of the micropores in the multi-layer micropore group increases gradually.

In one embodiment, the dense substrate is provided with two layers of micropore groups, which are respectively the first layer of micropore groups including a plurality of first micropores and the second layer of micropore groups including a plurality of second micropores. Hole group; the port of the first micropore away from the second layer of micropore group is located on the atomization surface, and the port of the second micropore away from the first layer of micropore group is located on the liquid absorption surface ; The end of the first micropore close to the second layer of micropore group communicates with the end of the second microhole close to the first layer of micropore group through the flow channel.

In one embodiment, the width of the first micropore is 5 micrometers to 100 micrometers, the width of the second micropore is 10 micrometers to 200 micrometers, and the width of the second micropore is not smaller than that of the first micropore. The width of the microwell.

In one embodiment, the cross-sectional shape of the first microhole is circular, and the cross-sectional shape of the second microhole is elongated; the width of the second microhole is not smaller than that of the first micropore. The diameter of the hole.

In one embodiment, the width of the second micropore is the same as the diameter of the micropore in the first layer.

In one embodiment, the first microhole is a first blind hole arranged on the atomization surface, and the axis of the first blind hole is parallel to the thickness direction of the dense matrix; the second microhole The hole is a second blind hole arranged on the liquid-absorbing surface, and the axis of the second blind hole is parallel to the thickness direction of the dense matrix;

The flow passage runs through the bottoms of the first blind hole and the second blind hole, so that the first blind hole communicates with the second blind hole.

In one embodiment, the wall surface of the flow channel close to the second blind hole is spaced from the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is separated from the bottom surface of the first blind hole. The bottom surface of the second blind hole is arranged at intervals;

Or, the wall surface of the flow channel close to the second blind hole is flush with the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is flush with the second blind hole. The bottom surface of the hole is even;

Or, the wall surface of the flow channel close to the second blind hole is flush with the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is flush with the second blind hole. The bottom surface of the hole is set at intervals;

Or, the wall surface of the flow channel close to the second blind hole is spaced from the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is separated from the second blind hole. The bottom surface of the hole is even.

In one embodiment, the wall surface of the flow channel close to the second blind hole is spaced from the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is separated from the bottom surface of the first blind hole. The bottom surfaces of the second blind holes are arranged at intervals; along the direction from the liquid-absorbing surface to the atomizing surface, the diameter of the first blind holes gradually increases, and the diameter of the second blind holes gradually decreases.

In one embodiment, the flow channel is a whole layer of gaps, and all the micropores of the two adjacent layers of the micropore groups communicate with the gap;

Or, the flow channel includes a plurality of first sub-channels arranged at intervals and extending along the first direction;

Or, the flow channel includes a plurality of second sub-channels arranged at intervals and extending along the second direction;

Or, the flow channel includes a plurality of first sub-channels arranged at intervals and extending along the first direction and a plurality of second sub-channels arranged at intervals and extending along the second direction, and the plurality of first sub-channels Intersect with the plurality of second sub-channels and communicate with each other.

In one embodiment, along the extending direction of the flow channel, the flow channel includes multiple center points, and the multiple center points are located on the same plane or on multiple planes.

In one embodiment, the multiple central points are located on the same plane, and the plane is parallel to or forms an included angle with the atomizing surface.

In one embodiment, the dense substrate is provided with two layers of micropore groups, which are respectively the first layer of micropore groups including a plurality of first micropores and the second layer of micropore groups including a plurality of second micropores. Hole group; the port of the first micropore away from the second layer of micropore group is located on the atomization surface, and the port of the second micropore away from the first layer of micropore group is located on the liquid absorption surface ; The end of the first micropore close to the second layer of micropore group communicates with the end of the second microhole close to the first layer of micropore group through the flow channel;

The flow channel includes a plurality of first sub-channels arranged at intervals and extending along a first direction and a plurality of second sub-channels arranged at intervals and extending in a second direction, the plurality of first sub-channels and the plurality of sub-channels The two second sub-channels are intersected and communicated with each other.

In one embodiment, the cross-sectional shape of the first micropore is circular, and the cross-sectional shape of the second micropore is elongated.

In one embodiment, the diameter of the first micropore is 10 micrometers to 100 micrometers; the width of the second micropore is 10 micrometers to 100 micrometers, and the length of the second micropore is greater than 100 micrometers.

In one embodiment, the diameter of the first microhole is the same as the width of the second microhole; and/or, the diameter of the first microhole is the same as that of the first sub-channel and the second Each of the sub-runners has the same width.

In one embodiment, the orthographic projection of the first microhole on the flow channel is located at the intersection of the first sub-channel and the second sub-channel, and the second microhole is located in the flow channel. The orthographic projection on the channel is located between two adjacent first sub-channels and spans multiple second sub-channels.

In one embodiment, a plurality of the first microholes are arranged in a two-dimensional array, the orthographic projection of each row of the first microholes on the flow channel is located on one of the first sub-channels, and each row of the first microholes The orthographic projection of the first microhole on the flow channel is located on one of the second sub-channels;

Along the extending direction of the second sub-channels, only one row of the second microholes is provided between two adjacent first sub-channels.

In one embodiment, the orthographic projection of the first microholes in the odd-numbered rows in the first layer of microhole groups on the flow channel is located at the intersection of the first sub-channel and the second sub-channel. , the orthographic projection of the first microholes in the even-numbered rows in the first layer of microhole groups on the flow channel is located on the first sub-channel and between two adjacent second sub-channels between;

The orthographic projection of the second microholes of the second layer of microhole groups on the flow channel is located on the second sub-channel and between two adjacent first sub-channels.

In one embodiment, the cross-sectional shape of the first micropore and the cross-sectional shape of the second micropore are both circular.

In one embodiment, the diameter of the second microhole is larger than the diameter of the first microhole; and/or, the diameter of the first microhole is the same as the width of the first sub-channel.

In one embodiment, the orthographic projection of the second microhole on the flow channel is located at the intersection of the first sub-channel and the second sub-channel;

The orthographic projection of one second microhole on the flow channel partially overlaps the orthographic projections of the four first microholes on the flow channel, and is identical to that of the same second microhole on the flow channel. The orthographic projections of the four first microholes on the flow channel whose orthographic projections on the channel partially overlap are distributed along the periphery of the orthographic projection of the same second microhole on the flow channel.

In one embodiment, a plurality of the first micropores and a plurality of the second micropores are arranged in a two-dimensional array;

The orthographic projections of the first microholes in two adjacent rows on the flow channel partially overlap with the same first sub-channel; the orthographic projections of the first microholes in two adjacent rows on the flow channel Both partially overlap with the same second sub-channel.

In one embodiment, the cross-sectional shape of the first micropore is elongated, and the cross-sectional shape of the second micropore is circular.

In one embodiment, the diameter of the second microhole is larger than the width of the first microhole; and/or, the diameter of the second microhole is larger than the first sub-channel and the second sub-channel. The respective widths of the runners.

In one embodiment, the orthographic projection of the first microhole on the flow channel is located on the first sub-channel or on the second sub-channel;

The orthographic projection of one second microhole on the flow channel partially overlaps the orthographic projections of the three first microholes on the flow channel, and the center line of the three first microholes forms a Triangle; there is one first microhole between two adjacent triangles.

In one embodiment, the plurality of first microholes are arranged in a two-dimensional array, and the first microholes are arranged in two adjacent rows; the plurality of second microholes are arranged in a two-dimensional array; Each of the second microholes partially overlaps the orthographic projections of one of the first microholes in odd rows and two adjacent first microholes in even rows on the flow channel.

In one embodiment, the cross-sectional shape of the first microhole and the cross-sectional shape of the second microhole are both circular, and the diameter of the second microhole is larger than the diameter of the first microhole; And/or, the diameter of the first microhole is the same as the respective widths of the first sub-channel and the second sub-channel.

In one embodiment, the widths of the first sub-channel and the second sub-channel are not smaller than the width of the first micropore and not greater than the width of the second micropore; and/or, the The height of the first sub-channel and the second sub-channel is 10 microns-150 microns.

In one embodiment, the flow channel separates the dense matrix into a first layer of dense matrix and a second layer of dense matrix, the first layer of dense matrix has the first layer of micropore groups, and the second layer of dense matrix The layer of dense matrix has the second layer of micropore groups; the thickness of the first layer of dense matrix is 0.1mm-1mm, and the thickness of the second layer of dense matrix is not greater than the thickness of the first layer of dense matrix.

In one embodiment, a heating element is further included, and the heating element is arranged on the atomizing surface.

In one embodiment, the material of the dense matrix is one of glass, dense ceramics, and sapphire.

In one embodiment, the thermal conductivity of the material of the dense matrix is less than 5 W/(m·K).

In one embodiment, the axis of the micropores of each layer of the micropore group is parallel to the thickness direction of the dense matrix; and/or, a plurality of the micropores of each layer of the micropore group are in an array arranged.

In one embodiment, the liquid-absorbing surface is parallel to the atomizing surface; the axes of the micropores are perpendicular to the liquid-absorbing surface, and the flow channels are parallel to the liquid-absorbing surface.

In one embodiment, the cross-sectional shape of the micropores of each layer of the micropore group is one of circular and elongated;

The cross-sectional shapes of the micropores of the micropore groups in different layers are the same or different.

In order to solve the above technical problems, the second technical solution provided by this application is: provide an atomizer, including a liquid storage cavity and a heating element; the liquid storage cavity is used to store a liquid aerosol generating substrate; the heating element It is the heating element described in any one of the above, the heating element is in fluid communication with the liquid storage cavity, and the heating element is used to atomize the aerosol generating substrate.

In order to solve the above technical problems, the third technical solution provided by this application is to provide an electronic atomization device, including an atomizer and a host, the atomizer is the above-mentioned atomizer, and the host uses It is used to provide electric energy for the heating element to work and control the heating element to atomize the aerosol-generating substrate.

Beneficial effects of the present application: Different from the prior art, the present application discloses a heating element, an atomizer and an electronic atomization device. Chemical surface; along the thickness direction of the dense matrix, the dense matrix is provided with multi-layer micropore groups and flow channels inside the dense matrix; The direction of the chemical surface extends; the micropores of the two adjacent layers of micropore groups are not aligned; the extending direction of the flow channel intersects with the extending direction of the microholes, so that the two adjacent layers of micropore groups are connected through the flow channel. By making the micropores of the micropore groups of two adjacent layers unaligned, the local resistance of the air bubbles moving to the liquid-absorbing surface is increased, the speed of the air bubbles moving to the liquid-absorbing surface is reduced, and the influence of the air bubbles on the liquid supply is reduced; at the same time, the flow channel Inducing air bubbles to flow in the flow channel makes it easy for the air bubbles to be discharged from the atomizing surface or induced to the non-atomizing area, further reducing the influence of air bubbles on the liquid supply, thereby ensuring sufficient liquid supply and avoiding dry burning.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic structural diagram of an electronic atomization device provided in an embodiment of the present application;

Fig. 2 is a schematic structural diagram of the atomizer of the electronic atomization device provided in Fig. 1;

Fig. 3a is a schematic structural view of the first embodiment of the heating element provided by the present application;

Fig. 3b is a structural schematic diagram of another positional relationship between the first micropore and the second micropore in the heating element shown in Fig. 3a;

Fig. 4 is a structural schematic diagram of another positional relationship between the first micropore and the second micropore in the heating element shown in Fig. 3a;

Fig. 5 is a schematic diagram of air bubbles flowing in the heating body shown in Fig. 3b;

Fig. 6 is a schematic diagram of the flow of air bubbles in the heat generating body where the micropores are straight-through holes;

Fig. 7 is a schematic structural view of another embodiment of the flow channel of the heating element shown in Fig. 3a;

Fig. 8 is a structural schematic diagram of another embodiment of the flow channel of the heating element shown in Fig. 3a;

Fig. 9a is a structural schematic diagram of another embodiment of the flow channel of the heating element shown in Fig. 3a;

Fig. 9b is a schematic structural view of another embodiment of the flow channel of the heating element shown in Fig. 3a;

Fig. 9c is a structural schematic diagram of another embodiment of the flow channel of the heating element shown in Fig. 3a;

Fig. 10 is a structural schematic diagram of the first embodiment of the projection of the first microhole and the second microhole on the flow channel of the heating element shown in Fig. 3a;

Fig. 11 is a schematic structural view of the second embodiment of the projection of the first microhole and the second microhole on the flow channel of the heating element shown in Fig. 3a;

Fig. 12 is a structural schematic diagram of the third embodiment of the projection of the first microhole and the second microhole on the flow channel of the heating element shown in Fig. 3a;

Fig. 13 is a structural schematic diagram of the fourth embodiment of the projection of the first microhole and the second microhole on the flow channel of the heating element shown in Fig. 3a;

Fig. 14 is a schematic structural view of the second embodiment of the heating element provided by the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the following description, for purposes of illustration rather than limitation, specific details, such as specific system architectures, interfaces, and techniques, are set forth in order to provide a thorough understanding of the present application.

The terms "first", "second", and "third" in this application are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include at least one of said features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship between the various components in a certain posture (as shown in the drawings) , sports conditions, etc., if the specific posture changes, the directional indication also changes accordingly. The terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or components inherent in those processes, methods, products, or devices.

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 a 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. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

The application will be described in detail below in conjunction with the accompanying drawings and embodiments.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of an electronic atomization device provided in an embodiment of the present application.

In this embodiment, an electronic atomization device 100 is provided. The electronic atomization device 100 can be used for atomization of aerosol-generating substrates. The electronic atomization device 100 includes an atomizer 1 and a host 2 electrically connected to each other.

Wherein, the atomizer 1 is used for storing the aerosol-generating substrate and atomizing the aerosol-generating substrate to form an aerosol that can be inhaled by a user. The atomizer 1 can be used in different fields, such as medical treatment, beauty treatment, recreational smoking and the like. In a specific embodiment, the nebulizer 1 can be used in an electronic aerosolization device for atomizing an aerosol-generating substrate and generating an aerosol for the smoker to inhale. The following examples are all based on leisure smoking example.

For the specific structure and function of the atomizer 1 , please refer to the specific structure and function of the atomizer 1 involved in the following embodiments, and can achieve the same or similar technical effects, and will not be repeated here.

The host 2 includes a battery (not shown) and a controller (not shown). The battery is used to provide electric energy for the operation of the atomizer 1 so that the atomizer 1 can atomize the aerosol generating substrate to form an aerosol; the controller is used to control the operation of the atomizer 1 . The host 2 also includes other components such as a battery holder and an airflow sensor.

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

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of the atomizer of the electronic atomization device provided in FIG. 1 .

The atomizer 1 includes a housing 10 , a heating element 11 , and an atomizing seat 12 . The atomizing seat 12 has an installation cavity (not shown in the figure), and the heating element 11 is arranged in the installation cavity; The housing 10 is formed with a mist outlet channel 13, the inner surface of the housing 10, the outer surface of the mist outlet channel 13 cooperate with the top surface of the atomization seat 12 to form a liquid storage chamber 14, and the liquid storage chamber 14 is used to store liquid aerosol generated matrix. Wherein, the heating element 11 is electrically connected with the host machine 2, and generates an aerosol with an atomized aerosol generating substrate.

The atomizing seat 12 includes an upper seat 121 and a lower seat 122 , the upper seat 121 cooperates with the lower seat 122 to form an installation cavity; The upper seat 121 is provided with a lower liquid channel 1211 ; the aerosol generating substrate in the liquid storage chamber 14 flows into the heating element 11 through the lower liquid channel 1211 , that is, the heating element 11 is in fluid communication with the liquid storage chamber 14 . The lower seat 122 is provided with an air intake passage 15, through which the outside air enters the atomization chamber 120, carries the atomized aerosol of the heating element 11 and flows to the mist outlet channel 13, and the user inhales through the port of the mist outlet channel 13. aerosol.

Please refer to Fig. 3a-Fig. 13, Fig. 3a is a structural schematic diagram of the first embodiment of the heating element provided by the present application, and Fig. 3b is another positional relationship between the first microhole and the second microhole in the heating element shown in Fig. 3a Schematic diagram of the structure, Figure 4 is a schematic structural diagram of another positional relationship between the first micropore and the second micropore in the heating element shown in Figure 3a, Figure 5 is a schematic diagram of the flow of air bubbles in the heating body shown in Figure 3b, Figure 6 is a schematic diagram of the bubble Schematic diagram of the flow in the heating body where the micropores are straight through holes, Fig. 7 is a structural schematic diagram of another embodiment of the flow channel of the heating element shown in Fig. 3a, and Fig. 8 is another embodiment of the flow channel of the heating element shown in Fig. 3a Figure 9a is a schematic structural view of another embodiment of the flow channel of the heating element shown in Figure 3a, Figure 9b is a structural schematic view of another embodiment of the flow channel of the heating element shown in Figure 3a, Figure 9c is a schematic view 3a is a schematic structural view of another embodiment of the flow channel of the heating element. FIG. 10 is a schematic structural view of the first embodiment of the projection of the first microhole and the second microhole of the heating element on the flow channel shown in FIG. 3a. Fig. 11 is a structural schematic diagram of the second embodiment of the projection of the first microhole and the second microhole of the heating element shown in Fig. 3a on the flow channel, and Fig. 12 is the first microhole and the second microhole of the heating element shown in Fig. 3a The structural schematic diagram of the third embodiment of the projection of the two microholes on the flow channel, Fig. 13 is the structural schematic diagram of the fourth embodiment of the projection of the first microhole and the second microhole on the flow channel of the heating element shown in Fig. 3a.

The heating element 11 includes an integrally formed dense matrix 111 . The dense matrix 111 is integrally formed for easy assembly. The dense matrix 111 has a liquid-absorbing surface 1111 and an atomizing surface 1112 oppositely disposed. Along the thickness direction of the dense matrix 111 , the dense matrix 111 is provided with multi-layer micropore groups 1113 and flow channels 1114 inside the dense matrix 111 . Each layer of micropore group 1113 includes a plurality of micropores 1113a, and the micropores 1113a extend along the direction from the liquid absorbing surface 1111 to the atomizing surface 1112. The extending direction of the channel 1114 intersects the extending direction of the microholes 1113a, so that the two adjacent layers of micropore groups 1113 communicate through the channel 1114. The microholes 1113a of the microhole groups 1113 in two adjacent layers are not aligned.

The dense matrix 111 is a sheet-like matrix, and the sheet-like shape is relative to the block, and the ratio of the length of the sheet to the thickness is larger than that of the block; for example, the dense matrix 111 is flat. (As shown in Figure 3a-Figure 9c), arc shape, cylinder shape, etc. When the dense base 111 is arc-shaped or cylindrical, other structures in the atomizer 1 are arranged in cooperation with the specific structure of the dense base 111 . It should be noted that, when the dense matrix 111 is arc-shaped, the length refers to its arc length; when the dense matrix 111 is cylindrical, the length refers to its circumference.

Compared with the existing cotton core heating element and porous ceramic heating element, the liquid supply channel of the sheet-type heating element 11 provided by the application is shorter and the liquid supply speed is faster, which is beneficial to ensure sufficient liquid supply and avoid dry burning .

The aerosol-generating substrate enters the micropore 1113a of the micropore group 1113 closest to the liquid absorption surface 1111 through the liquid absorption surface 1111, and then flows to the micropore 1113a of another layer of micropore group 1113 through the flow channel 1114, layer by layer Transport to the micropore 1113a of the micropore group 1113 closest to the atomizing surface 1112, and then arrive at the atomizing surface 1112 to be heated and atomized; The flow channels 1114 of two adjacent layers of micropore groups 1113 are transmitted from the liquid-absorbing surface 1111 to the atomizing surface 1112 .

In order to ensure that the aerosol-generating substrate is smoothly transmitted from the liquid-absorbing surface 1111 to the atomizing surface 1112, along the direction from the liquid-absorbing surface 1111 to the atomizing surface 1112, the micropores 1113a of the multilayer micropore group 1113 have a capillary force Gradually increase. That is, along the direction from the liquid-absorbing surface 1111 to the atomizing surface 1112, the liquid-locking ability of the micropores 1113a of the multilayer micropore group 1113 increases gradually.

The cross-sectional shape of the micropores 1113a of each layer of micropore groups 1113 is one of circular and strip. The micropores 1113a of the micropore groups 1113 in different layers have the same or different cross-sectional shapes. When the cross-sectional shape of the micropore 1113a is elongated, the air bubbles will grow laterally along the wall of the elongated hole, and will seldom rush out of the micropore 1113a, so that the phenomenon of returning air bubbles in the heating element 11 is significantly reduced. It should be noted that the cross-section of the microhole 1113a refers to the cross-section perpendicular to the direction of its axis.

The material of the dense matrix 111 is one of glass, dense ceramics, and sapphire, which can be specifically designed according to requirements.

The thermal conductivity of the dense matrix 111 is less than 5W/(m·K), which is beneficial to reduce heat loss and improve atomization efficiency.

In one embodiment, the axes of the micropores 1113a of each layer of micropore groups 1113 are parallel to the thickness direction of the dense matrix 111; and/or, the multiple micropores 1113a of each layer of micropore groups 1113 are arranged in an array. Wherein, the liquid-absorbing surface 1111 is parallel to the atomizing surface 1112, the axis of the micropore 1113a is perpendicular to the liquid-absorbing surface 1111, and the flow channel 1114 is parallel to the liquid-absorbing surface 1111 (as shown in Fig. 3a-Fig. 4 and Fig. 9a-Fig. 9c) . Taking the axis of the microhole 1113a parallel to the thickness direction of the dense matrix 111 as an example, the specific design of each layer of microhole group 1113 will be described in detail below. This application does not limit that the axis of the microhole 1113a must be parallel to the thickness direction of the dense matrix 111. .

In one embodiment, the dense matrix 111 is provided with two layers of micropore groups 1113, which are respectively the first layer of micropore groups 1113-1 including a plurality of first micropores 1113a-1 and the first layer of micropore groups 1113-1 including a plurality of second micropores 1113a. -2 second layer microwell group 1113-2. The port of the first micropore 1113a-1 away from the second layer of micropore group 1113-2 is located on the atomizing surface 1112, and the port of the second microhole 1113a-2 away from the first layer of micropore group 1113-1 is located on the liquid absorption surface 1111. The end of the first microhole 1113a-1 close to the second layer of microhole group 1113-2 communicates with the end of the second microhole 1113a-2 close to the first layer of microhole group 1113-1 through the flow channel 1114 (as shown in Figure 3a-Fig. 9c).

In other words, the flow channel 1214 separates the dense matrix 111 into a first layer of dense matrix and a second layer of dense matrix, the first layer of dense matrix has a first layer of micropore groups 1113-1, and the second layer of dense matrix has a second layer of Micropore group 1113-2; the thickness of the dense matrix of the first layer is 0.1mm-1mm, and the thickness of the dense matrix of the second layer is not greater than the thickness of the dense matrix of the first layer. If the thickness of the first layer of dense matrix is greater than 1 mm, the demand for liquid supply cannot be met, resulting in a decrease in the amount of aerosol and a large amount of heat loss; if the thickness of the first layer of dense matrix is less than 0.1 mm, it is not conducive to ensuring the strength of the dense matrix 111 , which is not conducive to improving the performance of the electronic atomization device.

It should be noted that the first layer of microhole group 1113-1 and the second layer of microhole group 1113-2 have the same meaning as the microhole group 1113, and the first microhole 1113a-1 and the second microhole 1113a-2 represent The meaning of is the same as that of the microhole 1113a, and it is just named as above for the convenience of introducing the structure of the heating element 11. This application only introduces the structure and technical effect of the heating element 11 in detail by taking two layers of micropore groups 1113 on the dense substrate 111 and a flow channel 1114 between the two layers of micropore groups 1113 as an example, and does not limit the density. The matrix 111 has only two layers of micropore groups 1113 .

As shown in Figure 6, if the micropore 311 on the heating element is a straight-through hole that runs through itself, the air bubbles generated on the atomization surface during the atomization process of the heating element are likely to quickly reach the liquid-absorbing surface 313 of the heating element along the micropore 311 Above all, if the air bubbles on the liquid-absorbing surface 313 are not separated in time, the aerosol-generating substrate cannot enter the micropores 311, resulting in insufficient liquid supply, which in turn leads to dry burning.

As shown in FIG. 5 , in this application, the microholes 1113a of the microhole groups 1113 of two adjacent layers are not aligned. The projection is misplaced, and the bubbles generated during the atomization process of the heating element 11 cannot enter the second microhole 1113a-2 along a straight line after entering the first microhole 1113a-1. The micropores 1113a-1 increase the local resistance of the air bubbles moving to the liquid-absorbing surface 1111, and slow down the speed of the air bubbles moving to the liquid-absorbing surface 1111. By setting the flow channel 1114 inside the dense matrix 111, the air bubbles can be induced to flow inside the flow channel 1114; generally, there are air and aerosol in the air bubbles to generate matrix vapor, and when the bubbles move at a low speed in the flow channel 1114, the aerosols in the bubbles generate Substrate steam condenses, reducing the volume of the bubbles; the bubbles moving at low speed and with reduced volume are easier to discharge from the atomizing surface 1112 or transported to the non-atomizing area through the flow channel 1114, reducing the influence of the bubbles on the liquid supply, which is beneficial to ensure Sufficient fluid supply prevents dry burning. That is to say, by setting the micropores 1113a on the dense matrix 111 as above, it is possible to prevent the air bubbles during the atomization process from recoiling back into the liquid storage chamber 14 and avoid the risk of air bubbles being stuck.

It should be noted that the projections of the first microhole 1113a-1 shown in Figure 4 and the second microhole 1113a-2 on the flow channel 1114 partially overlap; the first microhole 1113a shown in Figure 3a and Figure 3b -1 and the projection of the second microhole 1113a-2 on the flow channel 1114 are misaligned. The positional relationship between the first microhole 1113a-1 and the second microhole 1113a-2 shown in Figure 3a and Figure 4 can achieve the same technical effect as the first microhole 1113a-1 and the second microhole 1113a-1 shown in Figure 3b. The positional relationship between the holes 1113a-2 can achieve the same technical effect. Wherein, the effect diagram shown in FIG. 3b is shown in FIG. 5 .

In one embodiment, along the axis direction of the first microhole 1113a-1, the first microhole 1113a-1 has the same diameter; along the axis direction of the second microhole 1113a-2, the second microhole 1113a-2 of the same aperture.

In one embodiment, the width of the first microhole 1113a-1 is 5 micrometers to 100 micrometers, the width of the second microhole 1113a-2 is 10 micrometers to 200 micrometers, and the width of the second microhole 1113a-2 is not less than the width of the first microhole 1113a-2. The width of a micropore 1113a-1 is such that the aerosol-generating substrate can be transported from the liquid-absorbing surface 1111 to the atomizing surface 1112 to be heated and atomized. It should be noted that when the cross-sectional shape of the first microhole 1113a-1 and/or the second microhole 1113a-2 is circular, the width refers to its diameter.

In one embodiment, the cross-sectional shape of the first microhole 1113a-1 is circular, and the cross-sectional shape of the second microhole 1113a-2 is elongated. By setting the second micropore 1113a-2 as an elongated hole, compared with a circular hole, the liquid supply capacity can be improved; in addition, it can prevent backgassing (that is, air bubbles entering the liquid storage chamber 14 while satisfying the liquid supply speed). ). The resistance of the air bubbles to grow horizontally is relatively large, and it is difficult to fill the entire elongated hole, avoiding air bubbles from clogging 1113a-2, and ensuring sufficient liquid supply. Bubbles can grow laterally along the wall of the second micropore 1113a-2 in the hole, so that they will not enter the liquid storage chamber 14 in the opposite direction, which can improve the atomization efficiency and reduce the dry burning or breakage caused by the return air. membrane risk. The width of the second microhole 1113a-2 is not less than the diameter of the first microhole 1113a-1, so that the aerosol-generating substrate can flow from the second microhole 1113a-2 to the first microhole 1113a-1, and then be heated by the heating element 112 Atomization.

Optionally, the width of the second microhole 1113a-2 is the same as the diameter of the first microhole 1113a-1, which facilitates simultaneous corrosion processing after laser modification to form the first microhole 1113a-1 and the second microhole 1113a-2, It is beneficial to improve the processing efficiency.

In one embodiment, the projections of the first microhole 1113a-1 and the second microhole 1113a-2 on the atomizing surface 1112 are dislocated (as shown in FIG. 3a and FIG. 3b). Specifically, the projections of the first microhole 1113a-1 and the second microhole 1113a-2 on the atomizing surface 1112 are tangent or partly adjacent to each other (as shown in Figure 3a); the first microhole 1113a-1 and The projections of the second microholes 1113 a - 2 on the atomizing surface 1112 are arranged at intervals (as shown in FIG. 3 b ).

In one embodiment, the projections of the first microhole 1113a-1 and the second microhole 1113a-2 on the atomizing surface 1112 partially overlap (as shown in FIG. 4 ).

In one embodiment, the first microhole 1113a-1 is a first blind hole arranged on the atomizing surface 1112, and the axis of the first blind hole is parallel to the thickness direction of the dense matrix 111; the second microhole 1113a-2 is The second blind hole is arranged on the liquid-absorbing surface 1111, and the axis of the second blind hole is parallel to the thickness direction of the dense matrix 111; the flow channel 1114 runs through the bottom of the first blind hole and the second blind hole, so that the first blind hole It communicates with the second blind hole (as shown in Fig. 3a-Fig. 4, Fig. 7-Fig. 9c).

Optionally, the wall surface of the flow channel 1114 near the second blind hole (second microhole 1113a-2) is flush with the bottom surface of the first blind hole (first microhole 1113a-1), and the flow channel 1114 is close to the first The wall surface on one side of the blind hole (the first microhole 1113a-1) is flush with the bottom surface of the second blind hole (the second microhole 1113a-2) (as shown in Fig. 3a, Fig. 3b, Fig. 4, Fig. 7, Fig. 8 Show). It should be noted that along the thickness direction of the dense matrix 111, the wall surface of the flow channel 1114 close to the second blind hole (second microhole 1113a-2) and the flow channel 1114 are close to the first blind hole (first microhole 1113a-2). -1) The walls on one side are arranged opposite to each other. In this structure, the first microhole 1113 a - 1 and the second microhole 1113 a - 2 can also be understood as through holes located on both sides of the flow channel 1114 .

Optionally, the wall surface of the flow channel 1114 near the second blind hole (second microhole 1113a-2) is spaced apart from the bottom surface of the first blind hole (first microhole 1113a-1), and the flow channel 1114 is close to the first The wall surface on one side of the blind hole (first microhole 1113a-1) is spaced apart from the bottom surface of the second blind hole (second microhole 1113a-2) (as shown in FIG. 9a ). Through the above settings, air bubbles can be better blocked; at the same time, it is avoided that the flow channel 1114 is locally too narrow due to tolerances, thereby preventing the first micropore 1113a-1 and the second micropore 1113a-2 corresponding to the top and bottom of the local flow channel 1114 from being disconnected .

Optionally, the wall surface of the flow channel 1114 near the second blind hole (second microhole 1113a-2) is flush with the bottom surface of the first blind hole (first microhole 1113a-1), and the flow channel 1114 is close to the first The wall surface on one side of the blind hole (first microhole 1113a-1) is spaced apart from the bottom surface of the second blind hole (second microhole 1113a-2) (as shown in FIG. 9b ). Through the above settings, air bubbles can be better blocked; at the same time, it is avoided that the flow channel 1114 is locally too narrow due to tolerances, thereby preventing the first micropore 1113a-1 and the second micropore 1113a-2 corresponding to the top and bottom of the local flow channel 1114 from being disconnected .

Optionally, the wall surface of the flow channel 1114 near the second blind hole (second microhole 1113a-2) is spaced apart from the bottom surface of the first blind hole (first microhole 1113a-1), and the flow channel 1114 is close to the first The wall surface on one side of the blind hole (first microhole 1113a-1) is flush with the bottom surface of the second blind hole (second microhole 1113a-2) (as shown in FIG. 9c ). Through the above settings, air bubbles can be better blocked; at the same time, it is avoided that the flow channel 1114 is locally too narrow due to tolerances, thereby preventing the first micropore 1113a-1 and the second micropore 1113a-2 corresponding to the top and bottom of the local flow channel 1114 from being disconnected .

In one embodiment, along the extending direction of the flow channel 1114, the flow channel 1114 is divided into multiple parts, and each part has a center point M, that is, the flow channel 1114 includes multiple center points M; multiple center points M is located on the same plane (as shown in Figures 3a-4, 7-9c) or on multiple planes (as shown in Figure 8).

It should be noted that the dense matrix 111 is rectangular. The extending direction of the flow channel 1114 refers to that the flow channel 1114 extends from one side of the dense matrix 111 to the other side along the length direction of the dense matrix 111; or, the extending direction of the flow channel 1114 refers to that the flow channel 1114 extends along the The width direction of the dense matrix 111 extends from one side of the dense matrix 111 to the other side.

Optionally, the heights of the flow channels 1114 are the same along the extending direction of the flow channels 1114 . The height of the channel 1114 is 10 microns-150 microns. The height of the flow channel 1114 is less than 10 microns, which cannot achieve the effect of preventing air bubbles from entering the liquid-absorbing surface 1111, and is not easy to process; the height of the flow channel 1114 is greater than 150 microns, and the air bubbles are easy to merge and grow laterally to form large bubbles, which affects the supply. liquid.

Optionally, the multiple central points M are located on the same plane, which is parallel to the atomizing surface 1112 (as shown in FIGS. 3a-4 and 9a-9c).

Optionally, the multiple central points M are located on the same plane, which forms an included angle with the atomizing surface 1112 (as shown in FIG. 7 ). The included angle is 20°-60°.

Optionally, the multiple central points M are located on multiple planes, and the connecting lines of the multiple central points M form a curve (as shown in FIG. 8 ) or a polyline. The curve or broken line undulates up and down in the thickness direction of the dense matrix 111 , or undulates left and right in a direction perpendicular to the thickness of the dense matrix 111 .

In one embodiment, the flow channel 1114 is a whole-layer gap, and all the micropores 1113a of the two adjacent layers of the micropore groups 1113 communicate with the gap. At this time, the first microhole 1113a-1 and the second microhole 1113a-2 can also be understood as through holes located on both sides of the flow channel 1114, and the first microhole 1113a-1 and the second microhole 1113a-2 are in the mist The projections on the surface 1112 overlap at most.

Optionally, along the extending direction of the flow channel 1114, the gaps have the same height. The height of the gap is 10 microns-150 microns; if the height is less than 10 microns, the effect of preventing air bubbles from entering the liquid-absorbing surface 1111 cannot be achieved well, and it is not easy to process; if the height is greater than 150 microns, the air bubbles are easy to merge and grow laterally to form large air bubbles. affect the fluid supply.

Optionally, along the extending direction of the flow channel 1114, the cross-sectional shape of the flow channel 1114 is linear, curved or broken line.

In one embodiment, the channel 1114 includes a plurality of first sub-channels 1114a arranged at intervals and extending along the first direction X. As shown in FIG.

Optionally, the plurality of first sub-channels 1114a extend in a straight line, in a curved line, or in a broken line.

Optionally, the centerlines of the plurality of first sub-channels 1114a are on the same plane, and this plane is parallel to or forms an included angle with the atomizing surface 1112 .

Optionally, the centerlines of the multiple first sub-runners 1114a are not on the same plane, and the connecting lines between the ends on the same side of the centerlines of the multiple first sub-runners 1114a are curved lines or broken lines.

Optionally, the width of the first sub-channel 1114a is not less than the width of the first microhole 1113a-1 and not greater than the width of the second microhole 1113a-2; and/or, the height of the first sub-channel 1114a is 10 microns -150 microns. By setting the width of the first sub-channel 1114a as above, the aerosol-generating substrate can be guaranteed to flow smoothly from the liquid-absorbing surface to the atomizing surface. The height of the first sub-channel 1114a is less than 10 microns, which cannot prevent air bubbles from entering the liquid-absorbing surface 1111 well, and is difficult to process; the height of the first sub-channel 1114a is greater than 150 microns, and the air bubbles are easy to merge and grow laterally Large air bubbles are formed, affecting the liquid supply.

In one embodiment, the channel 1114 includes a plurality of second sub-channels 1114b arranged at intervals and extending along the second direction Y.

Optionally, the multiple second sub-channels 1114b extend in a straight line, in a curve or in a broken line.

Optionally, the centerlines of the plurality of second sub-channels 1114b are on the same plane, and this plane is parallel to or forms an included angle with the atomizing surface 1112 .

Optionally, the centerlines of the multiple second sub-channels 1114b are not on the same plane, and the connecting lines between the ends on the same side of the centerlines of the multiple second sub-channels 1114b are curved lines or broken lines.

Optionally, the width of the second sub-channel 1114b is not less than the width of the first microhole 1113a-1 and not greater than the width of the second microhole 1113a-2; and/or, the height of the second sub-channel 1114b is 10 microns - 150 microns. By setting the width of the second sub-channel 1114b as above, the aerosol-generating substrate can be guaranteed to flow smoothly from the liquid-absorbing surface to the atomizing surface. The height of the second sub-channel 1114b is less than 10 microns, which cannot prevent air bubbles from entering the liquid-absorbing surface 1111 well, and is difficult to process; the height of the second sub-channel 1114b is greater than 150 microns, and the air bubbles are easy to merge and grow laterally Large air bubbles are formed, affecting the liquid supply.

In one embodiment, the flow channel 1114 includes a plurality of first sub-channels 1114a arranged at intervals and extending along the first direction X and a plurality of second sub-channels 1114b arranged at intervals and extending along the second direction Y. The first sub-channel 1114a and the plurality of second sub-channels 1114b are intersected and communicated with each other (as shown in FIGS. 10-13 ).

Optionally, the width of the first sub-channel 1114a is the same as that of the second sub-channel 1114b.

Optionally, the width of the first sub-channel 1114a and the second sub-channel 1114b is not less than the width of the first microhole 1113a-1 and not greater than the width of the second microhole 1113a-2; and/or, the first sub-channel The height of the flow channel 1114a and the second sub-channel 1114b is 10 microns-150 microns. By setting the widths of the first sub-channel 1114a and the second sub-channel 1114b as above, it is ensured that the aerosol-generating substrate flows smoothly from the liquid-absorbing surface to the atomizing surface. The height of the first sub-flow channel 1114a and the second sub-flow channel 1114b is less than 10 microns, which cannot well realize the effect of preventing air bubbles from entering the liquid-absorbing surface 1111, and is not easy to process; the first sub-flow channel 1114a and the second sub-flow channel The height of the channel 1114b is greater than 150 microns, and the air bubbles are easy to merge and grow laterally to form large air bubbles, which affects the liquid supply.

Optionally, the plurality of first sub-channels 1114a extend in a straight line, in a curved line, or in a broken line.

Optionally, the multiple second sub-channels 1114b extend in a straight line, in a curve or in a broken line.

Optionally, the centerlines of the plurality of first sub-channels 1114a and the centerlines of the plurality of second sub-channels 1114b are on the same plane, and the plane is parallel to or forms an included angle with the atomizing surface 1112 .

Optionally, the centerlines of the plurality of first sub-runners 1114a and the centerlines of the plurality of second sub-runners 1114b are not on the same plane, and the connection of the endpoints on the same side of the centerlines of the plurality of first sub-runners 1114a The line is a curved line or a broken line, and the connection lines between the endpoints on the same side of the center line of the plurality of second sub-runners 1114b are curved lines or broken lines.

In this application, the flow channel 1114 includes a plurality of first sub-channels 1114a and a plurality of second sub-channels 1114b, and the axis of the first microhole 1113a-1 and the axis of the second microhole 1113a-2 are respectively connected to the dense matrix 111. Taking parallel thickness directions as an example, the positional relationship among the first microhole 1113a-1, the second microhole 1113a-2, and the flow channel 1114 will be described in detail.

In one embodiment, as shown in FIG. 10 , the orthographic projection of the first microhole 1113a-1 on the flow channel 1114 is located at the intersection of the first sub-channel 1114a and the second sub-channel 1114b, and the second microhole 1113a The orthographic projection of -2 on the channel 1114 is located between two adjacent first sub-channels 1114a, and spans multiple second sub-channels 1114b. The first microhole 1113a-1 and the second microhole 1113a-2 are completely misaligned.

Specifically, a plurality of first microholes 1113a-1 are arranged in a two-dimensional array, the orthographic projection of each row of first microholes 1113a-1 on the flow channel 1114 is located on a first sub-channel 1114a, and each column of the first The orthographic projection of the microhole 1113a-1 on the flow channel 1114 is located on a second sub-channel 1114b. Along the extension direction of the second sub-channel 1114b, only one row of second microholes 1113a-2 is provided between two adjacent first sub-channels 1114a, that is, multiple first sub-channels 1114a and multiple rows of second microholes 1114a The two microholes 1113a-1 are arranged alternately.

The cross-sectional shape of the first microhole 1113a-1 is a circle, and the cross-sectional shape of the second microhole 1113a-2 is a strip shape. By setting the second microhole 1113a-2 as a strip-shaped hole, relative to the circle The shape of the hole can improve the liquid supply capacity; in addition, the resistance of the air bubbles to grow horizontally is relatively large, and it is difficult to fill the entire elongated hole, avoiding the air bubbles from clogging 1113a-2, which is conducive to ensuring sufficient liquid supply. The diameter of the first microhole 1113a-1 is 10 microns-100 microns; the width of the second microhole 1113a-2 is 10 microns-100 microns, and the length is greater than 100 microns. A plurality of first sub-channels 1114a and a plurality of second microholes 1113a-1 are arranged alternately. The diameter of the first microhole 1113a-1 is the same as the width of the second microhole 1113a-2, which is convenient for simultaneous corrosion processing after laser modification to form the first microhole 1113a-1 and the second microhole 1113a-2, which is beneficial to improve processing efficiency and/or, the diameter of the first microhole 1113a-1 is the same as the respective widths of the first sub-channel 1114a and the second sub-channel 1114b. By making the diameter of the first microhole 1113a-1 the same as the respective widths of the first sub-channel 1114a and the second sub-channel 1114b, when the above-mentioned structure is formed by using a chemical etching process, it is beneficial to improve the processing efficiency.

In one embodiment, as shown in FIG. 11 , the orthographic projections of the first microholes 1113a-1 in the odd-numbered rows in the first layer of microhole groups 1113-1 on the flow channel 1114 are located between the first sub-channel 1114a and the second sub-channel 1114a. At the intersection of the sub-channels 1114b, the orthographic projections of the first microholes 1113a-1 of the even-numbered rows in the first layer of microhole groups 1113-1 on the flow channel 1114 are located on the first sub-channel 1114a and located between two adjacent channels. between the second sub-channels 1114b. The orthographic projection of the second microholes 1113a-2 of the second layer of microhole groups 1113-2 on the flow channel 1114 is located on the second sub-channel 1114b and between two adjacent first sub-channels 1114a. The first microhole 1113a-1 and the second microhole 1113a-2 are completely misaligned.

Specifically, a plurality of first microholes 1113a-1 are arranged in a two-dimensional array, and two adjacent rows are staggered. The plurality of second microholes 1113a-2 are arranged in a two-dimensional array, and are aligned with the two-dimensional array formed by the first microholes 1113a-1 in odd rows in the column direction.

Both the cross-sectional shape of the first microhole 1113a-1 and the cross-sectional shape of the second microhole 1113a-2 are circular.

The diameter of the second microhole 1113a-2 is larger than the diameter of the first microhole 1113a-1; and/or, the diameter of the first microhole 1113a-1 is the same as the width of the first sub-channel 1114a.

The width of the first sub-channel 1114a is the same as that of the second sub-channel 1114b.

Along the extending direction of the second sub-channel 1114b, only one second microhole 1113a-2 is provided between two adjacent first sub-channels 1114a. The diameter of the second microhole 1113a-2 is the same as the distance between two adjacent first sub-channels 1114a.

In one embodiment, as shown in FIG. 12 , the orthographic projection of the second microhole 1113 a - 2 on the channel 1114 is located at the intersection of the first sub-channel 1114 a and the second sub-channel 1114 b. The orthographic projection of one second microhole 1113a-2 on the flow channel 1114 partially overlaps the orthographic projections of the four first microholes 1113a-1 on the flow channel 1114. And the orthographic projections of the four first microholes 1113a-1 on the flow channel 1114 partially overlap with the orthographic projections of the same second microhole 1113a-2 on the flow channel 1114 along the same second microhole 1113a- 2 The peripheral distribution of the orthographic projection on the flow channel 1114. The first microhole 1113a-1 and the second microhole 1113a-2 are partially misaligned.

Specifically, the plurality of first microholes 1113a-1 and the plurality of second microholes 1113a-2 are arranged in a two-dimensional array. The orthographic projections of two adjacent rows of first microholes 1113a-1 on the flow channel 1114 partially overlap with the same first sub-channel 1114a; The projections all partially overlap with the same second sub-channel 1114b.

The cross-sectional shape of the first microhole 1113a-1 is elongated, and the cross-sectional shape of the second microhole 1113a-2 is circular. The diameter of the second microhole 1113a-2 is greater than the width of the first microhole 1113a-1; and/or, the diameter of the second microhole 1113a-2 is greater than the respective widths of the first sub-channel 1114a and the second sub-channel 1114b .

In one embodiment, as shown in FIG. 13 , the orthographic projection of the first microhole 1113a-1 on the flow channel 1114 is located on the first sub-channel 1114a or on the second sub-channel 1114b; one second microhole 1113a The orthographic projection of -2 on the flow channel 1114 partially overlaps the orthographic projections of the three first microholes 1113a-1 on the flow channel 1114, and the connecting lines of the centers of the three first microholes 1113a-1 form a triangle; There is a first microhole 1113a-1 between two adjacent triangles. The first microhole 1113a-1 and the second microhole 1113a-2 are partially misaligned.

Specifically, a plurality of first microholes 1113a-1 are arranged in a two-dimensional array, and two adjacent rows of first microholes 1113a-1 are arranged in dislocation; a plurality of second microholes 1113a-2 are arranged in a two-dimensional array; Each second microhole 1113 a - 2 partly overlaps the orthographic projections of one first microhole 1113 a - 1 in odd rows and two adjacent first microholes 1113 a - 1 in even rows on the flow channel 1114 . Among the plurality of first microholes 1113a-1 located in odd rows, the orthographic projections of the odd-numbered first microholes 1113a-1 and the second microholes 1113a-2 on the flow channel 1114 partially overlap, and the even-numbered first microholes The orthographic projection interval between the hole 1113a-1 and the second microhole 1113a-2 on the flow channel 1114; among the plurality of first microholes 1113a-1 in even rows, the nth and (n+1)th first The microhole 1113a-1 partially overlaps the orthographic projection of the same second microhole 1113a-2 on the flow channel 1114, and n is a natural number.

The cross-sectional shape of the first microhole 1113a-1 and the cross-sectional shape of the second microhole 1113a-2 are both circular, and the diameter of the second microhole 1113a-2 is greater than the diameter of the first microhole 1113a-1; and/ Or, the diameter of the first microhole 1113a-1 is the same as the respective widths of the first sub-channel 1114a and the second sub-channel 1114b.

Continuing to refer to FIG. 3 a , the heating element 11 further includes a heating element 112 disposed on the atomizing surface 1112 . The heating element 112 is electrically connected to the host 2 . The heating element 112 can be a heating sheet, a heating film, etc., and it only needs to be able to heat the atomized aerosol generating substrate. In another embodiment, the dense matrix 111 is at least partially conductive, and is used to heat the atomized aerosol-generating matrix with electricity, that is, the dense matrix 111 conducts liquid and atomizes at the same time. In one embodiment, the heating element 112 is a metal film deposited on the atomizing surface 1112 .

Please refer to FIG. 14 . FIG. 14 is a schematic structural diagram of the second embodiment of the heating element provided by the present application.

The structure of the second embodiment of the heating element 11 is basically the same as that of the first embodiment of the heating element 11, except that in the first embodiment of the heating element 11, along the axial direction of the microhole 1113a, the diameter of the microhole 1113a The same; while in the second embodiment of the heating element 11, along the axial direction of the microhole 1113a, the diameter of the microhole 1113a is different, and the same part will not be repeated.

In this embodiment, the first microhole 1113a-1 is a first blind hole provided on the atomizing surface 1112, and the axis of the first blind hole is parallel to the thickness direction of the dense matrix 111; the second microhole 1113a-2 is The second blind hole is disposed on the liquid-absorbing surface 1111 , and the axis of the second blind hole is parallel to the thickness direction of the dense matrix 111 .

The wall surface of the flow channel 1114 near the second blind hole (second microhole 1113a-2) is spaced apart from the bottom surface of the first blind hole (first microhole 1113a-1), and the flow channel 1114 is close to the first blind hole (the first microhole 1113a-1). The wall surface on one side of a microhole 1113a-1) is spaced apart from the bottom surface of the second blind hole (second microhole 1113a-2). It should be noted that along the thickness direction of the dense matrix 111, the wall surface of the flow channel 1114 close to the second blind hole (second microhole 1113a-2) and the flow channel 1114 are close to the first blind hole (first microhole 1113a-2). -1) The walls on one side are arranged opposite to each other.

Along the direction from the liquid-absorbing surface 1111 to the atomizing surface 1112, the diameter of the first blind hole (first microhole 1113a-1) gradually increases, and the diameter of the second blind hole (first microhole 1113a-2) gradually increases. decrease. The first blind hole (first microhole 1113a-1) and the second blind hole (second microhole 1113a-2) are tapered holes. The liquid supply rate can be further improved by performing the above-mentioned setting on the first microhole 1113a-1 and the second microhole 1113a-2.

The dense matrix 111 of the heating element 11 in the above embodiments provided by the present application can be formed by laser modification combined with chemical etching. After the untreated dense matrix is modified by laser, microcracks and internal stress are generated inside the material, and the chemical corrosion rate of the laser modified area is higher than that of the unlaser modified area. The laser-modified dense matrix is placed in the corrosive solution, and the laser-modified area will be gradually corroded, resulting in the multi-layer micropore group 1113 and the flow channel 1114 in the above embodiment. Among them, there are two types of laser modification methods, one is to focus the laser beam into a beam with a long focal depth, such as a Bessel beam, which can form a deep modified layer in a dense matrix. The microhole 1113a is formed by this process; the other type is to focus the laser beam into a beam with a short focal depth, for example, by using a high-magnification objective lens to focus, and this type of beam can form a modified layer with a smaller depth in the dense matrix. In the embodiment, the channel 1114 is formed by this process. Usually, the dense substrate is processed by different laser modification processes first, and then chemically etched.

It should be noted that the above method is only a preparation method for realizing the dense matrix 111 in any of the above embodiments, and the present application is not limited thereto.

The above is only the implementation mode of this application, and does not limit the scope of patents of this application. Any equivalent structure or equivalent process conversion made by using the contents of this application specification and drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present application in the same way.

Claims (38)

1. A heating element applied to an electronic atomization device for atomizing an aerosol-generating substrate, including:

   An integrally formed dense matrix with a liquid-absorbing surface and an atomizing surface oppositely arranged; along the thickness direction of the dense matrix, the dense matrix is provided with multi-layer micropore groups and flow channels inside the dense matrix The micropore group of each layer includes a plurality of micropores, and the micropores extend along the direction from the liquid-absorbing surface to the atomizing surface; the micropores of the micropore groups of two adjacent layers Non-aligned arrangement; the extending direction of the flow channel intersects with the extending direction of the microholes, so that two adjacent layers of the microhole groups communicate through the flow channels.
2. The heating element according to claim 1, wherein the capillary action of the micropores of the multi-layered micropore group gradually increases along the direction from the liquid absorbing surface to the atomizing surface.
3. The heating element according to claim 2, wherein two layers of the micropore groups are provided on the dense substrate, respectively the first layer of micropore groups including a plurality of first micropores and the first layer of micropore groups including a plurality of second micropores. The second layer of micropore group of holes; the port of the first micropore away from the second layer of micropore group is located on the atomization surface, and the second micropore is far away from the port of the first layer of micropore group Located on the liquid-absorbing surface; the end of the first micropore close to the second layer of micropore group communicates with the end of the second microhole close to the first layer of micropore group through the flow channel.
4. The heating element according to claim 3, wherein the width of the first micropore is 5 microns to 100 microns, the width of the second micropore is 10 microns to 200 microns, and the width of the second micropore is not less than the width of the first micropore.
5. The heating element according to claim 3, wherein the cross-sectional shape of the first microhole is circular, the cross-sectional shape of the second microhole is elongated; the width of the second microhole is not smaller than the diameter of the first micropore.
6. The heating element according to claim 5, wherein the width of the second micropore is the same as the diameter of the micropore in the first layer.
7. The heating element according to claim 3, wherein the first microhole is a first blind hole provided on the atomizing surface, and the axis of the first blind hole is parallel to the thickness direction of the dense matrix ; The second microhole is a second blind hole located on the liquid-absorbing surface, and the axis of the second blind hole is parallel to the thickness direction of the dense matrix;

   The flow passage runs through the bottoms of the first blind hole and the second blind hole, so that the first blind hole communicates with the second blind hole.
8. The heating element according to claim 7, wherein the wall surface of the flow channel close to the second blind hole is spaced apart from the bottom surface of the first blind hole, and the flow channel is close to the first blind hole The wall surface on one side is spaced apart from the bottom surface of the second blind hole;

   Or, the wall surface of the flow channel close to the second blind hole is flush with the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is flush with the second blind hole. The bottom surface of the hole is even;

   Or, the wall surface of the flow channel close to the second blind hole is flush with the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is flush with the second blind hole. The bottom surface of the hole is set at intervals;

   Or, the wall surface of the flow channel close to the second blind hole is spaced from the bottom surface of the first blind hole, and the wall surface of the flow channel close to the first blind hole is separated from the second blind hole. The bottom surface of the hole is even.
9. The heating element according to claim 8, wherein the wall surface of the flow channel close to the second blind hole is spaced apart from the bottom surface of the first blind hole, and the flow channel is close to the first blind hole The wall surface on one side is spaced apart from the bottom surface of the second blind hole; along the direction from the liquid-absorbing surface to the atomizing surface, the diameter of the first blind hole gradually increases, and the second blind hole The pore size decreases gradually.
10. The heating element according to claim 1, wherein the flow channel is a whole layer of gaps, and all the micropores of the two adjacent layers of the micropore groups communicate with the gap;

    Or, the flow channel includes a plurality of first sub-channels arranged at intervals and extending along the first direction;

    Or, the flow channel includes a plurality of second sub-channels arranged at intervals and extending along the second direction;

    Or, the flow channel includes a plurality of first sub-channels arranged at intervals and extending along the first direction and a plurality of second sub-channels arranged at intervals and extending along the second direction, and the plurality of first sub-channels Intersect with the plurality of second sub-channels and communicate with each other.
11. The heating element according to claim 1, wherein, along the extending direction of the flow channel, the flow channel includes a plurality of center points, and the plurality of center points are located on the same plane or on multiple planes.
12. The heating element according to claim 11, wherein a plurality of said central points are located on the same plane, and said plane is parallel to or forms an included angle with said atomizing surface.
13. The heating element according to claim 1, wherein two layers of the micropore groups are provided on the dense substrate, namely the first layer of micropore groups including a plurality of first micropores and the first layer of micropore groups including a plurality of second micropores. The second layer of micropore group of holes; the port of the first micropore away from the second layer of micropore group is located on the atomization surface, and the second micropore is far away from the port of the first layer of micropore group Located on the liquid-absorbing surface; the end of the first micropore close to the second layer of micropore group communicates with the end of the second micropore close to the first layer of micropore group through the flow channel;

    The flow channel includes a plurality of first sub-channels arranged at intervals and extending along a first direction and a plurality of second sub-channels arranged at intervals and extending in a second direction, the plurality of first sub-channels and the plurality of sub-channels The two second sub-channels are intersected and communicated with each other.
14. The heating element according to claim 13, wherein the cross-sectional shape of the first micropore is circular, and the cross-sectional shape of the second micropore is elongated.
15. The heating element according to claim 14, wherein the diameter of the first micropore is 10 microns to 100 microns; the width of the second micropore is 10 microns to 100 microns, and the length of the second micropore is Greater than 100 microns.
16. The heating element according to claim 14, wherein, the diameter of the first microhole is the same as the width of the second microhole; and/or, the diameter of the first microhole is the same as the width of the first sub-flow The channel and the second sub-channel have the same width.
17. The heating element according to claim 14, wherein the orthographic projection of the first microhole on the flow channel is located at the intersection of the first sub-channel and the second sub-channel, and the second The orthographic projection of the microhole on the flow channel is located between two adjacent first sub-channels and spans a plurality of the second sub-channels.
18. The heating element according to claim 17, wherein a plurality of the first microholes are arranged in a two-dimensional array, and the orthographic projection of each row of the first microholes on the flow channel is located in one of the first sub-holes. On the flow channel, the orthographic projection of each column of the first microholes on the flow channel is located on one of the second sub-channels;

    Along the extending direction of the second sub-channels, only one row of the second microholes is provided between two adjacent first sub-channels.
19. The heating element according to claim 13, wherein the orthographic projections of the odd-numbered first microholes in the first layer of microhole groups on the flow channel are located between the first sub-channel and the second sub-channel. At the intersection of the two sub-channels, the orthographic projections of the first microholes in the even-numbered rows in the first layer of microhole groups on the flow channel are located on the first sub-channel and located between the two adjacent between the second sub-runners;

    The orthographic projection of the second microholes of the second layer of microhole groups on the flow channel is located on the second sub-channel and between two adjacent first sub-channels.
20. The heating element according to claim 19, wherein the cross-sectional shape of the first micropore and the cross-sectional shape of the second micropore are both circular.
21. The heating element according to claim 20, wherein, the diameter of the second microhole is larger than the diameter of the first microhole; and/or, the diameter of the first microhole is the same as that of the first sub-channel of the same width.
22. The heating element according to claim 13, wherein the orthographic projection of the second microhole on the flow channel is located at the intersection of the first sub-channel and the second sub-channel;

    The orthographic projection of one second microhole on the flow channel partially overlaps the orthographic projections of the four first microholes on the flow channel, and is identical to that of the same second microhole on the flow channel. The orthographic projections of the four first microholes on the flow channel whose orthographic projections on the channel partially overlap are distributed along the periphery of the orthographic projection of the same second microhole on the flow channel.
23. The heating element according to claim 22, wherein a plurality of the first microholes and a plurality of the second microholes are arranged in a two-dimensional array;

    The orthographic projections of the first microholes in two adjacent rows on the flow channel partially overlap with the same first sub-channel; the orthographic projections of the first microholes in two adjacent rows on the flow channel Both partially overlap with the same second sub-channel.
24. The heating element according to claim 22, wherein the cross-sectional shape of the first micropore is elongated, and the cross-sectional shape of the second micropore is circular.
25. The heating element according to claim 24, wherein the diameter of the second microhole is larger than the width of the first microhole; and/or, the diameter of the second microhole is larger than the first sub-channel and the respective widths of the second sub-runners.
26. The heating element according to claim 13, wherein the orthographic projection of the first microhole on the flow channel is located on the first sub-channel or the second sub-channel;

    The orthographic projection of one second microhole on the flow channel partially overlaps the orthographic projections of the three first microholes on the flow channel, and the center line of the three first microholes forms a Triangle; there is one first microhole between two adjacent triangles.
27. The heating element according to claim 26, wherein a plurality of the first microholes are arranged in a two-dimensional array, and the first microholes in two adjacent rows are dislocated; a plurality of the second microholes are arranged in a Arranged in a two-dimensional array; each of the second microholes is equal to the orthographic projection of one of the first microholes in an odd row and two adjacent first microholes in an even row on the flow channel. overlapping.
28. The heating element according to claim 26, wherein the cross-sectional shape of the first microhole and the cross-sectional shape of the second microhole are both circular, and the diameter of the second microhole is larger than that of the first microhole. A diameter of a microhole; and/or, the diameter of the first microhole is the same as the respective widths of the first sub-channel and the second sub-channel.
29. The heating element according to claim 13, wherein the widths of the first sub-channel and the second sub-channel are not smaller than the width of the first microhole and not larger than the width of the second microhole and/or, the height of the first sub-channel and the second sub-channel is 10 microns-150 microns.
30. The heating element according to claim 13, wherein the flow channel separates the dense matrix into a first layer of dense matrix and a second layer of dense matrix, and the first layer of dense matrix has the first layer of micropores The dense matrix of the second layer has the micropore group of the second layer; the thickness of the dense matrix of the first layer is 0.1mm-1mm, and the thickness of the dense matrix of the second layer is not greater than that of the first layer The thickness of the dense matrix.
31. The heating element according to claim 1, further comprising a heating element disposed on the atomizing surface.
32. The heating element according to claim 1, wherein the material of the dense matrix is one of glass, dense ceramics, and sapphire.
33. The heating element according to claim 1, wherein the thermal conductivity of the material of the dense matrix is less than 5W/(m·K).
34. The heating element according to claim 1, wherein the axis of the micropores of each layer of the micropore group is parallel to the thickness direction of the dense matrix; and/or, a plurality of the micropore groups of each layer The micropores are arranged in an array.
35. The heating element according to claim 34, wherein the liquid-absorbing surface is parallel to the atomizing surface; the axis of the micropore is perpendicular to the liquid-absorbing surface, and the flow channel is parallel to the liquid-absorbing surface .
36. The heating element according to claim 1, wherein the cross-sectional shape of the micropores of each layer of the micropore group is one of a circle and a strip shape;

    The cross-sectional shapes of the micropores of the micropore groups in different layers are the same or different.
37. A nebulizer, comprising:

    a liquid storage chamber for storing an aerosol-generating substrate;

    A heating element, the heating element is in fluid communication with the liquid storage cavity, and the heating element is used to atomize the aerosol generating substrate; the heating element is the heating element described in any one of claims 1-36.
38. An electronic atomization device, including:

    A nebulizer, the nebulizer is the nebulizer according to claim 37;

    The host is used to provide electric energy for the operation of the heating element and to control the heating element to atomize the aerosol-generating substrate.

Images