Heating element, atomizer and electronic atomization device

Abstract

The present application discloses a heating element, an atomizer and an electronic atomization device, wherein the heating element comprises a dense matrix; the dense matrix has a liquid absorption surface and an atomization surface which are arranged opposite to each other, and a plurality of micropores are arranged on the dense matrix, and the micropores penetrate the liquid absorption surface and the atomization surface; wherein the atomization surface is a wetting structure which has been surface-treated, and the wetting structure is connected with the micropore liquid guide, thereby increasing the wetting area of ​​the atomization surface and improving the atomization efficiency.

Description

Technical Field

[0001] The present application relates to the field of atomization technology, and in particular to a heating element, an atomizer and an electronic atomization device. Background Art

[0002] The electronic atomization device is composed of a heating element, a battery, a control circuit and other parts. 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.

[0003] 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 porous heating element using a dense matrix such as glass is provided. However, the thermal conductivity efficiency of a dense matrix with through holes is poorer than that of a porous matrix with disordered through holes (such as porous ceramics), which affects the atomization efficiency. Summary of the invention

[0004] The present application provides a heating element with a dense matrix, and an atomizer and an electronic atomization device having the heating element to improve atomization efficiency.

[0005] In order to solve the above technical problems, the first technical solution provided by the present application is: to provide a heating element, which is applied to an electronic atomization device and is used to heat an atomized aerosol generating matrix, comprising a dense matrix; the dense matrix has a liquid absorption surface and an atomization surface which are arranged oppositely; a plurality of micropores are arranged on the dense matrix, and the micropores penetrate the liquid absorption surface and the atomization surface;

[0006] Wherein, the atomized surface is a wetting structure that has been surface treated, and the wetting structure is connected to the microporous liquid guide.

[0007] In one embodiment, the atomizing surface has a first concave-convex structure to form the wetting structure; the first concave-convex structure includes a plurality of first grooves, and the first grooves are connected to the plurality of micropores for conducting liquid.

[0008] In one embodiment, the plurality of first grooves are arranged parallel to each other, and the length direction of the first grooves is parallel to the first direction; a first convex strip is provided between two adjacent first grooves;

[0009] Or, a plurality of the first grooves are arranged parallel to each other, and the length direction of the first grooves is parallel to the second direction; and a second convex strip is provided between two adjacent first grooves;

[0010] Or, the plurality of first grooves include a plurality of first sub-grooves extending along the first direction and a plurality of second sub-grooves extending along the second direction, and the plurality of first sub-grooves and the plurality of second sub-grooves are arranged crosswise; and a convex block is provided between two adjacent first sub-grooves and two adjacent second sub-grooves;

[0011] The second direction intersects with the first direction.

[0012] In one embodiment, the plurality of first grooves include a plurality of first sub-grooves and a plurality of second sub-grooves; the plurality of first sub-grooves cooperate with the plurality of second sub-grooves to form a plurality of the protrusions distributed in an array.

[0013] In one embodiment, the plurality of ports of the plurality of micropores away from the liquid absorption surface are all located on the bottom surface of the first groove;

[0014] Or, the multiple ports of the multiple micropores away from the liquid absorbing surface are all located on the end surface of the protrusion away from the liquid absorbing surface;

[0015] Alternatively, a portion of the ports of the plurality of micropores away from the liquid absorbing surface are located on the bottom surface of the first groove, and another portion is located on the end surface of the protrusion away from the liquid absorbing surface.

[0016] In one embodiment, the multiple ports of the multiple micropores away from the liquid absorption surface are all located on the bottom surface of the first groove; the multiple micropores are distributed in an array, each of the first sub-grooves corresponds to a row of the micropores, and each of the second sub-grooves corresponds to a column of the micropores; the multiple rows of the bumps and the multiple rows of the micropores are alternately arranged, and the multiple columns of the bumps and the multiple columns of the micropores are alternately arranged.

[0017] In one embodiment, the heating element further includes a heating film, which is disposed on the surface of the wetting structure. The heating film is used to heat and atomize the aerosol generating matrix, and the heating film allows the corresponding micropores to be exposed.

[0018] In one embodiment, the heating element also includes a heating film, and the heating film includes a first part, a second part, a third part and a fourth part. The first part is located on the side wall and the bottom wall of the first sub-groove, the second part is located on the side wall and the bottom wall of the second sub-groove, the third part is located on the end surface of the protrusion away from the liquid absorption surface, and the fourth part extends to the corresponding hole wall of the micropore.

[0019] In one embodiment, the width of the first groove is 1 μm-100 μm.

[0020] In one embodiment, the width of the first groove is less than or equal to 1.2 times the diameter of the microhole.

[0021] In one embodiment, the depth of the first groove is 1 μm-200 μm.

[0022] In one embodiment, the depth of the first groove is 1 μm-50 μm.

[0023] In one embodiment, the plurality of micropores are arranged in an array, including a plurality of micropore columns parallel to a first direction; the wetting structure includes a plurality of first sub-grooves, the extension direction of the first sub-grooves is parallel to the first direction and corresponds to at least one micropore column parallel to the first direction.

[0024] In one embodiment, the plurality of micropores include a plurality of micropore columns parallel to the second direction, the wetting structure includes a plurality of second sub-grooves, the extension direction of the second sub-grooves is parallel to the second direction and corresponds to at least one micropore column parallel to the second direction, wherein the plurality of first sub-grooves are cross-connected with the plurality of second sub-grooves to form a network structure.

[0025] In one embodiment, the heating element further includes a positive electrode and a negative electrode, and two ends of the heating film are electrically connected to the positive electrode and the negative electrode respectively; the first direction is a direction along the positive electrode approaching the negative electrode.

[0026] In one embodiment, the surface of the heating film is an oleophilic structure and / or the surface of the heating film away from the dense matrix has a frosted structure or a sandblasted structure.

[0027] In one embodiment, the thickness of the heating film is 200nm-5μm; the material of the heating film is one or more of aluminum or its alloys, copper or its alloys, silver or its alloys, nickel or its alloys, chromium or its alloys, platinum or its alloys, titanium or its alloys, zirconium or its alloys, palladium or its alloys, iron or its alloys, gold or its alloys, molybdenum or its alloys, niobium or its alloys, and tantalum or its alloys.

[0028] In one embodiment, the thickness of the heating film is 200 nm-10 μm; the material of the heating film is one or more of stainless steel, nickel-chromium-iron alloy, and nickel-based corrosion-resistant alloy.

[0029] In one embodiment, the atomized surface is a frosted structure or a sandblasted structure to form the wetted structure.

[0030] In one embodiment, the liquid absorbing surface is a frosted structure or a sandblasted structure.

[0031] In one embodiment, the liquid absorbing surface has a second concave-convex structure, the second concave-convex structure has a plurality of second grooves, and the second grooves are connected to the microporous liquid guide.

[0032] In one embodiment, the material of the dense matrix is ​​quartz, glass or dense ceramic, and the micropores are ordered.

[0033] In one embodiment, the micropores are straight through holes, and the axes of the micropores are perpendicular to the dense matrix.

[0034] In one embodiment, a liquid guiding member is further included, and the liquid guiding member is spaced apart from the liquid absorbing surface of the dense matrix to form a gap; or the liquid guiding member is in contact with the liquid absorbing surface of the dense matrix.

[0035] In one embodiment, the liquid guiding member is a porous ceramic or a cotton core; or, the material of the liquid guiding member is dense, and a plurality of through holes are provided on the liquid guiding member.

[0036] In one embodiment, a plurality of transverse holes are further provided in the dense matrix, and the plurality of transverse holes connect the plurality of micropores; wherein the axis of the transverse hole intersects with the axis of the micropore.

[0037] In order to solve the above technical problems, the second technical solution provided in the present application is: to provide a nebulizer, comprising a liquid storage chamber and a heating element; the liquid storage chamber is used to store an aerosol generating matrix; the heating element is fluidly connected to the liquid storage chamber; the heating element is the heating element described in any one of the above items.

[0038] In order to solve the above technical problems, the third technical solution provided in this application is: to provide an electronic atomization device, including an atomizer and a host; the atomizer is the atomizer described above; the host is used to provide electrical energy for the atomizer to operate.

[0039] 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, wherein the heating element comprises a dense matrix; the dense matrix has a liquid absorption surface and an atomization surface which are relatively arranged, and a plurality of micropores are arranged on the dense matrix, and the micropores penetrate the liquid absorption surface and the atomization surface; wherein the atomization surface is a wetting structure which has been surface-treated, and the wetting structure is connected to the micropore liquid guide, thereby increasing the wetting area of ​​the atomization surface and improving the atomization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 is a schematic diagram of the structure of the electronic atomization device provided in an embodiment of the present application;

[0042] Figure 2 yes Figure 1 A schematic diagram of the structure of an atomizer of the provided electronic atomization device;

[0043] Figure 3 yes Figure 2 A schematic structural diagram of a first embodiment of a heating element of an atomizer provided;

[0044] Figure 4 yes Figure 3 A schematic diagram of the structure of the heating element provided as viewed from the atomizing surface side;

[0045] Figure 5 yes Figure 3 A schematic diagram of the structure of the heating element provided as viewed from the liquid absorption surface;

[0046] Figure 6 yes Figure 3 A schematic diagram of a local enlarged structure;

[0047] Figure 7 yes Figure 3 A schematic structural diagram of an embodiment of a first concave-convex structure of a heating element provided;

[0048] Figure 8 yes Figure 3 A schematic structural diagram of another embodiment of the first concave-convex structure of the heating element provided;

[0049] Fig. 9 yes Figure 3 A schematic structural diagram of another embodiment of the first concave-convex structure of the heating element provided;

[0050] Fig.10 yes Figure 2 A schematic structural diagram of a second embodiment of a heating element of an atomizer provided;

[0051] Fig.11 yes Figure 2 A schematic structural diagram of a third embodiment of a heating element of an atomizer provided;

[0052] Fig.12 yes Figure 2 A schematic structural diagram of a third embodiment of a heating element of an atomizer provided;

[0053] Fig.13 yes Figure 2 A schematic structural diagram of a dense matrix of a fifth embodiment of a heating element of an atomizer is provided. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0056] The terms "first", "second", and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of this application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0057] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0059] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of the electronic atomization device provided in an embodiment of the present application.

[0060] In this embodiment, an electronic atomization device 100 is provided. The electronic atomization device 100 can be used for atomization of an aerosol-generating substrate. The electronic atomization device 100 includes an atomizer 1 and a host 2 that are electrically connected to each other.

[0061] The atomizer 1 is used to store the aerosol generating substrate and atomize the aerosol generating substrate to form an aerosol for the user to inhale. The atomizer 1 can be used in different fields, such as medical treatment, beauty, leisure smoking, etc. In a specific embodiment, the atomizer 1 can be used in an electronic aerosolization device to atomize the aerosol generating substrate and generate an aerosol for the smoker to inhale. The following embodiments all take this leisure smoking as an example.

[0062] The specific structure and function of the atomizer 1 may refer to the specific structure and function of the atomizer 1 involved in the following embodiments, and the same or similar technical effects can be achieved, which will not be repeated here.

[0063] The host 2 includes a battery (not shown) and a controller (not shown). The battery is used to provide electrical energy for the operation of the atomizer 1, so that the atomizer 1 can atomize the aerosol-generating matrix 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.

[0064] The atomizer 1 and the host 2 can be integrally arranged or detachably connected, and can be designed according to specific needs.

[0065] See also Figure 2 , Figure 2 yes Figure 1 A schematic structural diagram of an atomizer of an electronic atomization device is provided.

[0066] The atomizer 1 includes a housing 10, a heating element 11, and an atomizer seat 12. The atomizer seat 12 has an installation cavity (not shown), and the heating element 11 is arranged in the installation cavity; the heating element 11 and the atomizer seat 12 are arranged in the housing 10 together. The housing 10 is formed with a mist outlet channel 13, and the inner surface of the housing 10, the outer surface of the mist outlet channel 13 and the top surface of the atomizer seat 12 cooperate to form a liquid storage cavity 14, which is used to store liquid aerosol generating matrix. Among them, the heating element 11 is electrically connected to the host 2 to generate aerosol by atomizing the aerosol generating matrix.

[0067] The atomizing seat 12 includes an upper seat 121 and a lower seat 122. The upper seat 121 and the lower seat 122 cooperate to form a mounting cavity; the atomizing surface of the heating element 11 cooperates with the cavity wall of the mounting cavity to form an atomizing cavity 120. A lower liquid channel 1211 is provided on the upper seat 121; the aerosol generating matrix channel in the liquid storage cavity 14 flows into the heating element 11 through the lower liquid channel 1211, that is, the heating element 11 is fluidically connected to the liquid storage cavity 14. An air inlet channel 15 is provided on the lower seat 122, and external gas enters the atomizing cavity 120 through the air inlet channel 15, carrying the atomized aerosol of the heating element 11 to flow to the mist outlet channel 13, and the user inhales the aerosol through the port of the mist outlet channel 13.

[0068] See also Figures 3 to 6 , Figure 3 yes Figure 2 A schematic structural diagram of a first embodiment of a heating element of an atomizer is provided, Figure 4 yes Figure 3 The schematic diagram of the structure of the heating element provided is viewed from the atomizing surface side. Figure 5 yes Figure 3 The schematic diagram of the structure of the heating element provided is viewed from the liquid absorption side. Figure 6 yes Figure 3 Schematic diagram of the local enlarged structure.

[0069] The heating element 11 includes a dense matrix 111, which has a liquid absorption surface 1111 and an atomization surface 1112 that are arranged opposite to each other. A plurality of micropores 1113 are arranged on the dense matrix 111, and the micropores 1113 are through holes that penetrate the liquid absorption surface 1111 and the atomization surface 1112, and the plurality of micropores 1113 are orderly. The micropores 1113 are used to guide the aerosol generating matrix from the liquid absorption surface 1111 to the atomization surface 1112. That is, the aerosol generating matrix in the liquid storage chamber 14 flows to the liquid absorption surface 1111 of the dense matrix 111 through the lower liquid channel 1211, and is guided to the atomization surface 1112 by the capillary force of the micropores 1113; that is, the aerosol generating matrix flows from the liquid absorption surface to the atomization surface under the action of gravity and / or capillary force. The aerosol generating matrix is ​​heated and atomized on the atomization surface of the heating element 11 to generate an aerosol. The atomizing surface 1112 is a surface-treated wetted structure, and the wetted structure is in liquid-conducting communication with the micropores 1113. The liquid-absorbing surface 1111 is a smooth surface.

[0070] It can be understood that since the aerosol generating matrix is ​​atomized on the atomizing surface 1112 to generate aerosol, by providing a wetting structure on the atomizing surface 1112, the wetting area of ​​the atomizing surface 1112 is increased, so that more aerosol generating matrix can be attached to the atomizing surface 1112, thereby improving the atomization efficiency.

[0071] The material of the dense matrix 111 is glass, dense ceramic, silicon or quartz. When the material of the dense matrix 111 is glass, it can be one of ordinary glass, quartz glass, borosilicate glass and photosensitive lithium aluminosilicate glass.

[0072] The dense matrix 111 is in the form of a sheet. It can be understood that the sheet is relative to the block, and the ratio of the length to the thickness of the sheet is greater than the ratio of the length to the thickness of the block; for example, a rectangular sheet. The dense matrix 111 can also be in the form of a flat plate, an arc, a cylinder, etc., and is specifically designed according to needs. The other structures of the atomizer 1 are arranged in coordination with the shape of the dense matrix 111. The micropores 1113 on the dense matrix 111 are straight through holes that penetrate the two opposite surfaces of the dense matrix 111, and the axis of the micropores 1113 is perpendicular to the dense matrix 111, that is, the extension direction of the micropores 1113 is perpendicular to the dense matrix 111.

[0073] The pore size of the micropores 1113 on the dense matrix 111 is 1 μm-100 μm. When the pore size of the micropores 1113 is less than 1 μm, the liquid supply demand cannot be met, resulting in a decrease in the amount of aerosol; when the pore size of the micropores 1113 is greater than 100 μm, the aerosol-generating matrix is ​​easy to flow out of the micropores 1113 to cause leakage. Optionally, the pore size of the micropores 1113 is 20 μm-50 μm. It is understandable that the pore size of the micropores 1113 is selected according to actual needs.

[0074] The thickness of the dense matrix 111 is 0.1mm-2mm. Among them, the thickness of the dense matrix 111 is the distance between the liquid absorption surface 1111 and the atomization surface 1112. When the thickness of the dense matrix 111 is greater than 2mm, the liquid supply demand cannot be met, resulting in a decrease in the amount of aerosol, and the heat loss caused is large, and the cost of setting up the dense matrix 111 is high; when the thickness of the dense matrix 111 is less than 0.1mm, the strength of the dense matrix 111 cannot be guaranteed, which is not conducive to improving the performance of the electronic atomization device. Optionally, the thickness of the dense matrix 111 is 0.3mm-0.8mm. It can be understood that the thickness of the dense matrix 111 is selected according to actual needs.

[0075] The ratio of the thickness of the dense matrix 111 to the pore size of the micropores 1113 is 20:1-3:1 to improve the liquid supply capacity. When the ratio of the thickness of the dense matrix 111 to the pore size of the micropores 1113 is greater than 20:1, the aerosol-generating matrix supplied by the capillary force of the micropores 1113 is difficult to meet the atomization requirements, which is not only prone to dry burning, but also reduces the amount of aerosol generated by a single atomization; when the ratio of the thickness of the dense matrix 111 to the pore size of the micropores 1113 is less than 3:1, the aerosol-generating matrix is ​​easy to flow out of the micropores 1113 to cause waste, resulting in a decrease in atomization efficiency, and then a decrease in the total aerosol amount. Optionally, the ratio of the thickness of the dense matrix 111 to the pore size of the micropores 1113 is 15:1-5:1.

[0076] The ratio of the center distance between two adjacent micropores 1113 to the pore size of the micropore 1113 is 3:1-1.5:1, so that the micropores 1113 on the dense matrix 111 can improve the strength of the dense matrix 111 as much as possible while satisfying the liquid supply capacity; optionally, the ratio of the center distance between two adjacent micropores 1113 to the pore size of the micropore 1113 is 3:1-2:1; further optionally, the ratio of the center distance between two adjacent micropores 1113 to the pore size of the micropore 1113 is 3:1-2.5:1.

[0077] In this embodiment, the heating element 11 also includes a heating element 112, a positive electrode 113 and a negative electrode 114, and the two ends of the heating element 112 are electrically connected to the positive electrode 113 and the negative electrode 114 respectively. The heating element 112 is used to generate a matrix for atomizing aerosol. The heating element 112 is arranged on the atomizing surface 1112 of the dense matrix 111, that is, the heating element 12 is arranged on the surface of the above-mentioned wetting structure to heat the atomizing aerosol to generate the matrix to generate aerosol. The positive electrode 113 and the negative electrode 114 are both arranged on the atomizing surface 1112 of the dense matrix 111 to facilitate electrical connection with the host 2. The heating element 112 can be a heating sheet, a heating film, a heating net, etc., which can heat the atomizing aerosol to generate the matrix. In another embodiment, the heating element 112 can be buried inside the dense matrix 111. In another embodiment, at least part of the dense matrix 111 is conductive to serve as the heating element 112.

[0078] Optionally, the heating element 112 is a heating film, the thickness of the heating film is 200nm-5μm, and the material of the heating film is one or more of aluminum or its alloys, copper or its alloys, silver or its alloys, nickel or its alloys, chromium or its alloys, platinum or its alloys, titanium or its alloys, zirconium or its alloys, palladium or its alloys, iron or its alloys, gold or its alloys, molybdenum or its alloys, niobium or its alloys, and tantalum or its alloys.

[0079] Optionally, the heating element 112 is a heating film, the thickness of the heating film is 200nm-10μm, and the material of the heating film is one or more of stainless steel (304, 316L, 317L, 904L, etc.), nickel-chromium-iron alloy (inconel625, inconel718, etc.), and nickel-based corrosion-resistant alloy (nickel-molybdenum alloy B-2, nickel-chromium-molybdenum alloy C-276).

[0080] In other embodiments, the aerosol-generating matrix can be atomized by microwave heating, laser heating, etc., which can be specifically designed according to needs.

[0081] The heating element 112 is used as an example to heat the heating element 112 , the heating element 112 is arranged on the surface of the wetted structure, and the heating element 112 is a heating film, to introduce the heating body 11 in detail.

[0082] Optionally, the heating film is formed by a physical vapor deposition process with the atomized surface 1112 of the dense substrate 111. The heating film allows the corresponding micropores 1113 to be exposed (eg, Figure 3 and Figure 4 shown).

[0083] See also Figure 4 and Figure 5In this embodiment, a plurality of micropores 1113 are arranged in an array only on a part of the surface of the dense matrix 111. Specifically, the dense matrix 111 is provided with a micropore array area 1114 and a blank area 1115 arranged around the micropore array area 1114. The micropore array area 1114 has a plurality of micropores 1113, and the blank area 1115 is not provided with micropores 1113; the heating element 112 is arranged in the micropore array area 1114 to heat the atomized aerosol to generate the matrix; the positive electrode 113 and the negative electrode 114 are arranged in the blank area 1115 of the atomizing surface 1112 to ensure the stability of the electrical connection between the positive electrode 113 and the negative electrode 114.

[0084] By providing a micropore array area 1114 and a blank area 1115 around the micropore array area 1114 on the dense substrate 111, the number of micropores 1113 on the dense substrate 111 is reduced, thereby improving the strength of the dense substrate 111 and reducing the production cost of providing the micropores 1113 on the dense substrate 111. The micropore array area 1114 in the dense substrate 111 serves as an atomization area, covering the heating element 112 and the surrounding area of ​​the heating element 112, that is, basically covering the area that reaches the temperature of the atomized aerosol generation substrate, making full use of the thermal efficiency.

[0085] It can be understood that the size of the area around the micropore array area 1114 of the dense matrix 111 in the present application is larger than the aperture of the micropore 1113, and it can be called the blank area 1115; that is, the blank area 1115 in the present application is the area where the micropore 1113 can be formed but is not formed, rather than the area around the micropore array area 1114 where the micropore 1113 cannot be formed. In one embodiment, the distance between the micropore 1113 closest to the edge of the dense matrix 111 and the edge of the dense matrix 111 is larger than the aperture of the dense matrix 111, and it is considered that the blank area 1115 is provided in the circumferential direction of the micropore array area 1114.

[0086] In this embodiment, the atomization surface 1112 of the dense matrix 111 has a first concave-convex structure 1116 to form a wetting structure. The first concave-convex structure 1116 includes a plurality of first grooves 1116a, which are in liquid-conducting communication with a plurality of micropores 1113. The capillary force of the first grooves 1116a can guide the aerosol-generating matrix from the micropores 1113 to the first grooves 1116a, and part of the heating film (heating element 112) is deposited in the first grooves 1116a. The plurality of first grooves 1116a span the micropore array area 1114. It can be understood that, compared with the smooth surface of the atomizing surface, the atomizing surface 1112 includes a plurality of first grooves 1116a, and the aerosol generating matrix can be stored in the first grooves 1116a, which increases the area of ​​the atomizing surface 1112, and also increases the contact area between the aerosol generating matrix and the heating film (heating element 112), that is, increases the effective atomizing area, which is conducive to improving the atomization efficiency; and, because the first grooves 1116a have capillary force, the aerosol generating matrix in the first grooves 1116a will not flow back to the liquid storage chamber 14, and the aerosol generating matrix in the first grooves 1116a will be directly atomized, avoiding repeated heating, and the aerosol reduction degree is high. In addition, since the electronic atomizing device will be stopped for a period of time, a certain amount of aerosol generating matrix will be stored in the first grooves 1116a, and the user will not dry burn even if the electronic atomizing device is inverted and inhaled a few times when using it next time.

[0087] Optionally, the width of the first groove 1116a is 1 μm-100 μm. When the width of the first groove 1116a is greater than 100 μm, the capillary force of the first groove 1116a is not strong, and the effect of improving the atomization efficiency is not obvious; when the width of the first groove 1116a is less than 1 μm, the flow resistance is too large, so that the flow of the aerosol generating matrix is ​​slow.

[0088] Optionally, the width of the first groove 1116 a is less than or equal to 1.2 times the aperture of the micropore 1113 to ensure that the capillary force of the first groove 1116 a meets the requirement.

[0089] Optionally, the depth of the first groove 1116a is 1μm-200μm. When the depth of the first groove 1116a is less than 1μm, the capillary force of the first groove 1116a is not obvious, and it is difficult to lead the aerosol generating matrix in the micropore 1113 to the first groove 1116a, resulting in dry burning in the first groove 1116a; when the depth of the first groove 1116a is greater than 200μm, the problem of liquid explosion is prone to occur, and the heating film (heating element 112) is not easy to form in the first groove 1116a. If the dense matrix 111 is very thin, the depth of the first groove 1116a is too deep, which is easy to affect the strength. Optionally, the depth of the first groove 1116a is 1μm-50μm, which can prevent liquid explosion and avoid the aerosol particles from being too large. If you want the aerosol particles to be larger, the depth of the first groove 1116a can be selected to be 50-200μm.

[0090] In one embodiment, a plurality of first grooves 1116a are arranged parallel to each other, and the length direction of the first grooves 1116a is parallel to the first direction; a first convex strip 1116b (such as Figure 7 As shown, Figure 7 yes Figure 3 A schematic diagram of a structure of an embodiment of a first concave-convex structure of a heating element is provided. The first direction is a direction along the positive electrode 113 approaching the negative electrode 114. A plurality of micropores 1112 are arranged in an array, including a plurality of micropore columns parallel to the first direction, and the first groove 1116a corresponds to at least one micropore column parallel to the first direction. At this time, the first concave-convex structure 1116 includes a plurality of first grooves 1116a and a plurality of first convex strips 1116b.

[0091] Optionally, the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 are all located on the bottom surface of the first groove 1116a (eg Figure 7 or, the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 are all located on the end surface of the first convex strip 1116b away from the liquid absorption surface 1111; or, a part of the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 are located on the bottom surface of the first groove 1116a, and the other part is located on the end surface of the first convex strip 1116b away from the liquid absorption surface 1111.

[0092] Optionally, the end of the same micropore 1113 away from the liquid absorption surface 1111 is located at the bottom surface of the first groove 1116a (eg Figure 7 or, a portion of the port of the same micropore 1113 away from the liquid absorption surface 1111 is located on the end surface of the first convex strip 1116b away from the liquid absorption surface 1111; or, a portion of the port of the same micropore 1113 away from the liquid absorption surface 1111 is located on the bottom surface of the first groove 1116a, and another portion is located on the end surface of the first convex strip 1116b away from the liquid absorption surface 1111.

[0093] Optionally, the heating film includes a first part, a second part and a third part; the first part of the heating film (heating element 112) is located at the side wall and the bottom wall of the first groove 1116a, the second part is located at the end surface of the first convex strip 1116b away from the liquid absorption surface 1111, and the third part extends to the hole wall of the corresponding micropore 1113. Since the part of the heating film located at the side wall and / or the bottom wall of the first groove 1116a is directly electrically connected to the positive electrode 113 and the negative electrode 114, the part of the heating film located at the side wall and / or the bottom wall of the first groove 1116a has current passing through it, and can directly generate heat to heat the aerosol-forming matrix in the first groove 1116a and the micropore 1113, thereby improving energy utilization.

[0094] In another embodiment, a plurality of first grooves 1116a are arranged parallel to each other, and the length direction of the first grooves 1116a is parallel to the second direction; a second convex strip 1116c (such as Figure 8 As shown, Figure 8 yes Figure 3 A schematic diagram of the structure of another embodiment of the first concave-convex structure of the heating element is provided. Wherein, the second direction intersects with the first direction. Exemplarily, the angle between the second direction and the first direction is 90 degrees. A plurality of micropores 1112 are arranged in an array, including a plurality of micropore columns parallel to the second direction, and the first groove 1116a corresponds to at least one micropore column parallel to the second direction. At this time, the first concave-convex structure 1116 includes a plurality of first grooves 1116a and a plurality of second ridges 1116c. It can be understood that the angle between the second direction and the first direction is not limited to 90 degrees, and can also be an acute angle or an obtuse angle.

[0095] Optionally, the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 are all located on the bottom surface of the first groove 1116a (eg Figure 8 or, the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 are all located on the end surface of the second convex strip 1116c away from the liquid absorption surface 1111; or, a part of the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 is located on the bottom surface of the first groove 1116a, and the other part is located on the end surface of the second convex strip 1116c away from the liquid absorption surface 1111.

[0096] Optionally, the end of the same micropore 1113 away from the liquid absorption surface 1111 is located at the bottom surface of the first groove 1116a (eg Figure 8or, a portion of the port of the same micropore 1113 away from the liquid absorption surface 1111 is located on the bottom surface of the first groove 1116a, and another portion is located on the end surface of the second ridge 1116c away from the liquid absorption surface 1111.

[0097] Optionally, the heating film includes a first part, a second part and a third part; the first part of the heating film (heating element 112) is located at the side wall and the bottom wall of the first groove 1116a, the second part is located at the end surface of the second convex strip 1116c away from the liquid absorption surface 1111, and the third part extends to the hole wall of the corresponding micropore 1113. Since the part of the heating film located at the side wall and / or the bottom wall of the first groove 1116a is directly electrically connected to the positive electrode 113 and the negative electrode 114, the part of the heating film located at the side wall and / or the bottom wall of the first groove 1116a has current passing through it, and can directly generate heat to heat the aerosol forming matrix in the first groove 1116a and the micropore 1113, thereby improving energy utilization.

[0098] In another embodiment, the plurality of first grooves 1116a include a plurality of first sub-grooves A extending in the first direction and a plurality of second sub-grooves B extending in the second direction, wherein the plurality of first sub-grooves A and the plurality of second sub-grooves B are arranged crosswise; a protrusion 1116d (such as Fig. 9 As shown, Fig. 9 yes Figure 3 A structural schematic diagram of another embodiment of the first concave-convex structure of the heating element is provided). Wherein, the first direction is the direction along the positive electrode 113 approaching the negative electrode 114, and the second direction intersects with the first direction. Exemplarily, the angle between the second direction and the first direction is 90 degrees. At this time, the first concave-convex structure 1116 includes a plurality of first sub-grooves A, a plurality of second sub-grooves B and a plurality of protrusions 1116d. It can be understood that the angle between the second direction and the first direction is not limited to 90 degrees, and can also be an acute angle or an obtuse angle. The first sub-grooves A and the second sub-grooves B are cross-connected to form a mesh structure.

[0099] Optionally, the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 are all located on the bottom surface of the first groove 1116a (eg Fig. 9 or, a portion of the multiple ports of the multiple micropores 1113 away from the liquid absorption surface 1111 are located on the bottom surface of the first groove 1116a, and another portion is located on the end surface of the protrusion 1116d away from the liquid absorption surface 1111.

[0100] Optionally, the end of the same micropore 1113 away from the liquid absorption surface 1111 is located at the bottom surface of the first groove 1116a (eg Fig. 9 or, a portion of the port of the same micropore 1113 away from the liquid absorption surface 1111 is located on the end surface of the protrusion 1116d away from the liquid absorption surface 1111; or, a portion of the port of the same micropore 1113 away from the liquid absorption surface 1111 is located on the bottom surface of the first groove 1116a, and the other portion is located on the end surface of the protrusion 1116d away from the liquid absorption surface 1111.

[0101] Optionally, the plurality of first sub-grooves A cooperate with the plurality of second sub-grooves B to form a plurality of protrusions 1116d distributed in an array. The plurality of micropores 1113 are arranged in an array, including a plurality of micropore columns parallel to the first direction and a plurality of micropore columns parallel to the second direction; the extension direction of the first sub-grooves A is parallel to the first direction and corresponds to at least one micropore column parallel to the first direction; the extension direction of the second sub-grooves B is parallel to the second direction and corresponds to at least one micropore column parallel to the second direction, wherein the plurality of first sub-grooves A and the plurality of second sub-grooves B are cross-connected to form a mesh structure.

[0102] Exemplarily, the plurality of micropores 1113 are distributed in an array; the plurality of ports of the plurality of micropores 1113 away from the liquid absorption surface 1111 are all located on the bottom surface of the first groove 1116a; each first sub-groove A corresponds to a micropore column parallel to a first direction, and each second sub-groove B corresponds to a micropore column parallel to a second direction; multiple rows of protrusions 1116d and multiple rows of micropores 1113 are alternately arranged, and multiple columns of protrusions 1116d and multiple columns of micropores 1113 are alternately arranged (e.g. Fig. 9 shown).

[0103] Optionally, the heating film includes a first portion, a second portion, a third portion and a fourth portion; the first portion of the heating film (heating element 112) is located at the side wall and the bottom wall of the first sub-groove A, the second portion is located at the side wall and the bottom wall of the second sub-groove B, the third portion is located at the end surface of the protrusion 1116d away from the liquid absorption surface 1111, and the fourth portion extends to the hole wall of the corresponding micropore 1113 (such as Figure 6 As shown). Since the heating film located on the side wall and / or the bottom wall of the first groove 1116a is directly electrically connected to the positive electrode 113 and the negative electrode 114, the heating film located on the side wall and / or the bottom wall of the first groove 1116a has current flowing therethrough, and can directly generate heat to heat the aerosol-forming matrix in the first groove 1116a and the micropores 1113, thereby improving energy utilization.

[0104] It should be noted that when the atomizing surface of the heating element is a smooth surface, when the heating film is formed on the atomizing surface by a physical vapor deposition process, the heating film includes a plane heating film, a heating film in the hole, and a heating film in the connecting corner area. The plane heating film is located on the atomizing surface, the heating film in the hole is located in the micropore, and the heating film in the connecting corner area connects the plane heating film and the heating film in the hole. Through the potential simulation analysis when the heating element is energized, it is found that in this type of heating element, the current is basically in the surface heating film and the heating film in the connecting corner area, and there is almost no current passing through the heating film in the hole. Therefore, it can be considered that the area where the heating element actually generates heat is the surface heating film and the heating film in the connecting corner area, and the heating film in the hole is the heat transfer area. Through the observation of the atomizing surface during atomization, it is found that whether it is working or not working, the atomizing surface is basically free of oil film, so it is determined that the heating film in the hole is actually used for atomization. In the potential simulation analysis when the heating element is energized, the heating film in the hole is the heat transfer area, so the energy utilization rate of the heating film can be said to be low, which is intuitively expressed as a small amount of atomization. At the same time, reverse inference is that heat is only dissipated through the heating film in the hole, and then the entire heating film, which simultaneously brings about the risk of dry burning and burning.

[0105] The present application sets the atomization surface 1112 of the dense matrix 111 as a wetting structure, for example, the atomization surface 1112 has a first concave-convex structure 1116, and the heating film (heating element 112) is also formed on the side wall and bottom wall of the first groove 1116a of the first concave-convex structure 1116, thereby increasing the effective heating area of ​​the heating element 112, thereby improving the energy utilization rate, and the first groove 1116a leads part of the aerosol generating matrix to the groove for atomization, which is conducive to improving the atomization efficiency. Since atomization is performed simultaneously in the first groove 1116a and the micropores 1113, it is possible to effectively prevent the aerosol generating matrix in the hole from being emptied instantly due to excessive atomization in the hole, and the sound of suction and return air caused by air intake. At the same time, the contact area between the aerosol generating matrix and the heating element 112 is increased by the first concave-convex structure 1116, thereby increasing the heat dissipation area of ​​the heating element 112, thereby effectively preventing dry burning.

[0106] The applicant also found that by setting the atomizing surface 1112 as a wetting structure, the heating film is deposited on a rough surface. Compared with the atomizing surface being a smooth surface, the heating film is deposited on a smooth surface, and the atomization amount is significantly improved, for example, from 6.2 mg / puff to 8.5 mg / puff, and the fouling phenomenon is also significantly reduced, which also improves the taste and sweetness of the aerosol.

[0107] It is understood that the longitudinal cross-section of the first groove 1116a is rectangular, triangular, circular, arc-shaped, V / U-shaped, Ω-shaped, etc., which can be designed according to actual needs. The longitudinal cross-section refers to a cross-section along a direction perpendicular to the dense matrix 111 .

[0108] In other embodiments, the first concave-convex structure 1116 on the atomized surface 1112 may cover the area where the heating film (heating element 112) is provided; or, the first concave-convex structure 1116 on the atomized surface 1112 may only cover a portion of the area where the heating film (heating element 112) is provided; or, the first concave-convex structure 1116 on the atomized surface 1112 may cover a portion of the area where the heating film (heating element 112) is provided and cover a portion of the blank area 1115, which can improve the energy utilization rate of the heating element 112 to a certain extent.

[0109] In other embodiments, the atomized surface 1112 is set to a frosted structure or a sandblasted structure to form a wetted structure, which can achieve the same technical effect as the atomized surface 1112 having the first concave-convex structure 1116 to form a wetted structure, and will not be described in detail.

[0110] See also Fig.10 , Fig.10 yes Figure 2 A schematic structural diagram of a second embodiment of a heating element of an atomizer is provided.

[0111] Fig.10 The heating element 11 provided Figure 3 The structures of the heating elements 11 provided are basically the same, except that the structure of the liquid absorption surface 1111 of the dense matrix 111 is different, and the same parts will not be repeated.

[0112] In this embodiment, the liquid absorbing surface 1111 has a second concave-convex structure 1117, and the second concave-convex structure 1117 has a plurality of second grooves 1117a; the specific arrangement of the second concave-convex structure 1117 can refer to the specific arrangement of the first concave-convex structure 1116, and will not be repeated. The second grooves 1117a are connected to the plurality of micropores 1113 for liquid conduction, and the second grooves 1117a are arranged to prevent bubbles entering from the micropores 1113 from adhering to the liquid absorbing surface 1111 and growing, thereby preventing the micropores 1113 in the surrounding area from discharging liquid.

[0113] The present application also provides a heating element 11. In this embodiment, Figure 3 The structures of the heating elements 11 provided are basically the same, except that the structures of the heating elements 112 are different. Specifically, the heating element 112 is a heating film, and the heating film is an oleophilic structure and / or the surface of the heating film away from the dense substrate 111 has a frosted structure or a sandblasted structure, so that the contact angle is small and the wettability is high, which is conducive to improving energy utilization and atomization efficiency.

[0114] In a set of comparative experiments, under the condition that other conditions remain unchanged, the dense substrate is quartz glass, the thickness of the dense substrate is 400 μm, the pore diameter of the micropores is 40 μm, the pore spacing is 80 μm, the heating film is a thin film, and the power is 6.5 W. The inventors tested the heating element with a smooth atomized surface and a grooved atomized surface (see Figure 4 ) conducted a comparison experiment on atomization volume, where the groove depth was 15-25μm and the groove width was 30-40μm. The result showed that the atomization volume increased from 6.2mg / mouth to 7.6mg / mouth. In other words, under the condition that other conditions remain unchanged, the groove is opened on the atomization surface of the dense matrix, and the heating element is partially located in the groove, which can greatly improve the heat utilization rate and atomization volume.

[0115] See also Fig.11 , Fig.11 yes Figure 2 A schematic structural diagram of a third embodiment of a heating element of an atomizer is provided.

[0116] Fig.11 The heating element 11 provided Figure 3 The structures of the heating elements 11 provided are basically the same, except that the heating element 11 further includes a first protective film 115 and a second protective film 116 , and the same parts will not be described in detail.

[0117] The first protective film 115 is arranged on the surface of the heating element 112 away from the dense matrix 111, and the material of the first protective film 115 is a non-conductive material resistant to corrosion by the aerosol generating matrix; the second protective film 116 is arranged on the surface of the positive electrode 113 and the negative electrode 114 away from the dense matrix 111, and the material of the second protective film 116 is a conductive material resistant to corrosion by the aerosol generating matrix, which effectively prevents the aerosol generating matrix from corroding the heating element 112 and the positive electrode 113 and the negative electrode 114, and is beneficial to improving the service life of the heating body 11.

[0118] Optionally, the material of the first protective film 115 is ceramic or glass. Since the material of the heating element 112 is metal, the thermal expansion coefficient of the ceramic or glass matches that of the metal heating element 112, and the adhesion of the ceramic or glass matches that of the metal heating element 112. Using ceramic or glass as the first protective film 115, the first protective film 115 is not easy to fall off from the heating part 1121, and can play a good protective role.

[0119] When the material of the first protective film 115 is ceramic, the material of the ceramic may be one or more of aluminum nitride, silicon nitride, aluminum oxide, silicon oxide, silicon carbide, and zirconium oxide, and may be selected according to specific needs.

[0120] Optionally, the thickness of the first protection film 115 is 10 nm-1000 nm.

[0121] Optionally, the thickness of the second protection film 116 is 10 nm-2000 nm.

[0122] Optionally, the material of the second protective film 116 is conductive ceramic or metal. Compared with the first protective film 115 which is a non-conductive material, the second protective film 116 is a conductive material, so that the second protective film 116 protects the positive electrode 113 and the negative electrode 114 from being corroded by the aerosol generating matrix while not affecting the electrical connection between the positive electrode 113 and the negative electrode 114 and the host 2. By using conductive ceramic or metal as the second protective film 116, it is beneficial to reduce the contact resistance.

[0123] When the material of the second protective film 116 is conductive ceramic, the material of the conductive ceramic is one or more of titanium nitride and titanium diboride. It can be understood that conductive ceramic is more resistant to aerosol-generating matrix corrosion than metal.

[0124] See also Fig.12 , Fig.12 yes Figure 2 A schematic structural diagram of a fourth embodiment of a heating element of an atomizer is provided.

[0125] Fig.12 The heating element 11 provided Figure 3 The structures of the provided heating elements 11 are basically the same, except that the heating element 11 further includes a liquid guide 117 , and the same parts will not be described in detail.

[0126] Optionally, the liquid guiding member 117 is made of a porous material, such as porous ceramics, a cotton core, etc.

[0127] Optionally, the material of the liquid guiding member 117 is dense, for example, dense ceramic, glass, etc.; in this case, a plurality of through holes (not shown) are provided on the liquid guiding member 117, and the through holes have capillary force.

[0128] Optionally, the liquid guide 117 is in contact with the liquid absorption surface 1111 of the dense matrix 111 (eg Fig.12 The aerosol-generating matrix is ​​guided to the liquid absorption surface 1111 of the dense matrix 111 by the capillary force of the liquid guide 117 .

[0129] Optionally, the liquid guide 117 is opposite to the liquid absorption surface 1111 of the dense matrix 111 and is spaced apart to form a gap (not shown). The aerosol generating matrix is ​​guided to the gap by the capillary force of the liquid guide 117 and then enters the liquid absorption surface 1111 of the dense matrix 111.

[0130] By providing a liquid guide 117 on one side of the liquid absorption surface 1111 of the dense matrix 111, the liquid supply speed is further controlled.

[0131] See also Fig.13 , Fig.13yes Figure 2 A schematic structural diagram of a fifth embodiment of a heating element of an atomizer is provided.

[0132] Fig.13 The heating element 11 provided Figure 3 The structures of the heating elements 11 provided are basically the same, except that a plurality of transverse holes 1118 are further provided in the dense matrix 111 of the heating element 11 . The same parts will not be described in detail.

[0133] The plurality of transverse holes 1118 connect the plurality of micropores 1113. The axis of the transverse hole 1118 intersects the axis of the micropore 1113. Optionally, the axis of the transverse hole 1118 is perpendicular to the axis of the micropore 1113.

[0134] A plurality of micropores 1113 and a plurality of transverse holes 1118 form a grid-like microfluidic channel. During the atomization process, bubbles will enter the micropores 1113. By providing the transverse holes 1118, it is possible to prevent the bubbles entering through the adjacent micropores 1113 from connecting together, that is, it is possible to prevent the bubbles from growing. At the same time, even if the bubbles enter the liquid absorption surface 1111 from the atomization surface 1112 through the micropores 1113, and grow by attaching to the liquid absorption surface 1111, blocking part of the micropores 1113, the transverse holes 1118 can replenish the aerosol generation matrix to the blocked micropores 1113, so that the atomization surface 1112 can ensure timely liquid supply and avoid dry burning. The transverse holes 1118 also have a certain liquid storage function, which can ensure that at least two puffs will not burn out.

[0135] It can be understood that the features of the first embodiment of the heating element 11, the second embodiment of the heating element 11, the third embodiment of the heating element 11, the fourth embodiment of the heating element 11, and the fifth embodiment of the heating element 11 provided in the present application can be arbitrarily combined as needed.

[0136] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heating element, used in an electronic atomization device, for heating an atomized aerosol generating substrate, characterized in that: include: A dense matrix has a liquid absorption surface and an atomization surface that are arranged opposite to each other; a plurality of micropores are arranged on the dense matrix, and the micropores penetrate the liquid absorption surface and the atomization surface; the plurality of micropores are distributed in an array; the dense matrix is ​​in a sheet shape; Among them, the atomized surface is a surface-treated wetting structure, and the wetting structure is connected to the microporous liquid guide; the atomized surface has a first concave-convex structure to form the wetting structure; the first concave-convex structure includes a plurality of first grooves, and the first grooves are connected to the plurality of microporous liquid guides.

2. The heating element according to claim 1, characterized in that: The plurality of first grooves are arranged parallel to each other, and the length direction of the first grooves is parallel to the first direction; a first convex strip is provided between two adjacent first grooves; Or, a plurality of the first grooves are arranged parallel to each other, and the length direction of the first grooves is parallel to the second direction; and a second convex strip is provided between two adjacent first grooves; Or, the plurality of first grooves include a plurality of first sub-grooves extending along the first direction and a plurality of second sub-grooves extending along the second direction, and the plurality of first sub-grooves and the plurality of second sub-grooves are arranged crosswise; and a convex block is provided between two adjacent first sub-grooves and two adjacent second sub-grooves; The second direction intersects with the first direction.

3. The heating element according to claim 2, characterized in that: The plurality of first grooves include a plurality of first sub-grooves and a plurality of second sub-grooves; the plurality of first sub-grooves cooperate with the plurality of second sub-grooves to form a plurality of the protrusions distributed in an array.

4. The heating element according to claim 3, characterized in that: A plurality of ports of the plurality of micropores away from the liquid absorption surface are all located on the bottom surface of the first groove; Or, the multiple ports of the multiple micropores away from the liquid absorbing surface are all located on the end surface of the protrusion away from the liquid absorbing surface; Alternatively, a portion of the ports of the plurality of micropores away from the liquid absorbing surface are located on the bottom surface of the first groove, and another portion is located on the end surface of the protrusion away from the liquid absorbing surface.

5. The heating element according to claim 4, characterized in that: Multiple ports of the micropores away from the liquid absorption surface are all located on the bottom surface of the first groove; each of the first sub-grooves corresponds to a row of the micropores, and each of the second sub-grooves corresponds to a column of the micropores; multiple rows of the bumps and multiple rows of the micropores are alternately arranged, and multiple columns of the bumps and multiple columns of the micropores are alternately arranged.

6. The heating element according to any one of claims 2 to 5, characterized in that: The heating element further comprises a heating film, which is arranged on the surface of the wetting structure, and is used for heating and atomizing the aerosol generating matrix, and the heating film allows the corresponding micropores to be exposed.

7. The heating element according to any one of claims 2 to 5, characterized in that: The heating element also includes a heating film, which includes a first part, a second part, a third part and a fourth part. The first part is located on the side wall and the bottom wall of the first sub-groove, the second part is located on the side wall and the bottom wall of the second sub-groove, the third part is located on the end surface of the protrusion away from the liquid absorption surface, and the fourth part extends to the corresponding hole wall of the micropore.

8. The heating element according to claim 1, characterized in that The width of the first groove is 1 μm-100 μm.

9. The heating element according to claim 1, characterized in that: The width of the first groove is less than or equal to 1.2 times the aperture of the micropore.

10. The heating element according to claim 1, characterized in that The depth of the first groove is 1 μm-200 μm.

11. The heating element according to claim 10, characterized in that: The depth of the first groove is 1 μm-50 μm.

12. The heating element according to claim 1, characterized in that: The plurality of micropores include a plurality of micropore columns parallel to the first direction; the plurality of first grooves include a plurality of first sub-grooves, the extension direction of the first sub-grooves is parallel to the first direction and corresponds to at least one micropore column parallel to the first direction.

13. The heating element according to claim 12, characterized in that: The multiple micropores include multiple micropore columns parallel to the second direction, the multiple first grooves include multiple second sub-grooves, the extension direction of the second sub-grooves is parallel to the second direction and corresponds to at least one micropore column parallel to the second direction, wherein the multiple first sub-grooves are cross-connected with the multiple second sub-grooves to form a network structure.

14. The heating element according to claim 6, characterized in that: The heating element further includes a positive electrode and a negative electrode, and two ends of the heating film are electrically connected to the positive electrode and the negative electrode respectively; the first direction is a direction along the positive electrode approaching the negative electrode.

15. The heating element according to claim 6, characterized in that: The surface of the heating film is an oleophilic structure and / or the surface of the heating film away from the dense matrix has a frosted structure or a sandblasted structure.

16. The heating element according to claim 6, characterized in that: The thickness of the heating film is 200nm-5μm; the material of the heating film is one or more of aluminum or its alloys, copper or its alloys, silver or its alloys, nickel or its alloys, chromium or its alloys, platinum or its alloys, titanium or its alloys, zirconium or its alloys, palladium or its alloys, iron or its alloys, gold or its alloys, molybdenum or its alloys, niobium or its alloys, and tantalum or its alloys.

17. The heating element according to claim 6, characterized in that: The thickness of the heating film is 200nm-10μm; the material of the heating film is one or more of stainless steel, nickel-chromium-iron alloy, and nickel-based corrosion-resistant alloy.

18. The heating element according to claim 1, characterized in that The liquid absorbing surface is a frosted structure or a sandblasted structure.

19. The heating element according to claim 1, characterized in that The liquid absorbing surface has a second concave-convex structure, the second concave-convex structure has a plurality of second grooves, and the second grooves are connected to the microporous liquid guide.

20. The heating element according to claim 1, characterized in that The material of the dense matrix is ​​quartz, glass or dense ceramic, and the micropores are ordered.

21. The heating element according to claim 1, characterized in that The micropores are straight through holes, and the axes of the micropores are perpendicular to the dense matrix.

22. The heating element according to claim 1, characterized in that It also includes a liquid guiding member, which is spaced apart from the liquid absorbing surface of the dense matrix to form a gap; or, the liquid guiding member is in contact with the liquid absorbing surface of the dense matrix.

23. The heating element according to claim 22, characterized in that: The liquid guiding member is a porous ceramic or a cotton core; or, the material of the liquid guiding member is dense, and a plurality of through holes are provided on the liquid guiding member.

24. The heating element according to claim 1, characterized in that A plurality of transverse holes are also provided in the dense matrix, and the plurality of transverse holes connect the plurality of micropores; wherein the axis of the transverse hole intersects with the axis of the micropore.

25. An atomizer, characterized in that: include: A liquid storage chamber, used for storing an aerosol-generating matrix; A heating element, wherein the heating element is in fluid communication with the liquid storage chamber; the heating element is the heating element according to any one of claims 1 to 24.

26. An electronic atomization device, characterized in that: include: An atomizer, wherein the atomizer is the atomizer according to claim 25; The host is used to provide electrical energy for the atomizer to operate.

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