Heating element, atomizer and electronic atomization device

Abstract

The present application discloses a heating element, an atomizer and an electronic atomization device. The heating element includes a dense matrix; the dense matrix has a liquid absorption surface and an atomization surface which are oppositely arranged; a plurality of micropores are arranged on the dense matrix, and the micropores are through holes penetrating the liquid absorption surface and the atomization surface; wherein, a convex part or a concave part is arranged on the liquid absorption surface to promote the detachment of bubbles on the liquid absorption surface, so as to avoid the blockage of liquid supply by the bubbles on the liquid absorption surface, and further avoid dry burning of the heating element.

Description

Technical Field

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

[0002] An electronic atomization device is composed of a heating element, a battery, a control circuit, etc. As the core component of the electronic atomization device, the characteristics of the heating element determine the atomization effect and user experience of the electronic atomization device.

[0003] One type of existing heating element is a cotton core heating element. Most cotton core heating elements are structures in which a spring-shaped metal heating wire is wound around a cotton rope or a fiber rope. The liquid aerosol generation matrix to be atomized is absorbed at both ends of the cotton rope or the fiber rope, and then transmitted to the central metal heating wire for heating and atomization. Due to the limited area of the ends of the cotton rope or the fiber rope, the adsorption and transmission efficiency of the aerosol generation matrix is low. In addition, the structural stability of the cotton rope or the fiber rope is poor, and phenomena such as dry burning, carbon deposition, and burnt smell are likely to occur after multiple thermal cycles.

[0004] Another type of existing heating element is a ceramic heating element. Most ceramic heating elements form a metal heating film on the surface of a porous ceramic body; the porous ceramic body plays a role in guiding and storing liquid, and the metal heating film realizes the heating and atomization of the liquid aerosol generation matrix. However, it is difficult to precisely control the position distribution and size accuracy of the micropores in the porous ceramic prepared by high-temperature sintering. In order to reduce the risk of liquid leakage, it is necessary to reduce the pore diameter and porosity, but in order to achieve sufficient liquid supply, it is necessary to increase the pore diameter and porosity, and the two are contradictory. At present, under the conditions of pore diameter and porosity that meet the low liquid leakage risk, the liquid guiding ability of the porous ceramic matrix is limited, and a burnt smell will appear under high-power conditions.

[0005] With the progress 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 heating element with a straight through-hole structure is used to replace the heating element with a disordered porous structure. However, the straight through-hole is more likely to introduce air than the disordered porous structure, and it is easy to form bubbles on the liquid absorption surface of the heating element, blocking the liquid inlet and causing the heating element to dry burn. Summary of the Invention

[0006] The heating element, atomizer, and electronic atomization device provided by the present application solve the technical problem that the heating element with a straight through-hole structure in the prior art is easy to introduce air.

[0007] To solve the above technical problem, the first technical solution provided by the present application is: to provide a heating element, including a dense matrix; the dense matrix has a liquid absorption surface and an atomization surface arranged opposite to each other; a plurality of micropores are provided on the dense matrix, and the micropores are through-holes penetrating the liquid absorption surface and the atomization surface; wherein, a protrusion or a depression is provided on the liquid absorption surface to promote the detachment of bubbles on the liquid absorption surface.

[0008] Wherein, the convex part or the concave part has a capillary force, and can conduct liquid transversely along the liquid absorption surface, thereby promoting the detachment of air bubbles on the liquid absorption surface.

[0009] Wherein, the convex part is arranged on the liquid absorption surface; the convex part includes a plurality of convexes arranged on the liquid absorption surface, and at least two of the convexes are arranged around each of the micropores.

[0010] Wherein, four evenly distributed convexes are arranged around each of the micropores.

[0011] Wherein, the plurality of convexes and the plurality of micropores are both arranged in an array.

[0012] Wherein, the plurality of convexes and the plurality of micropores are arranged in a dislocation manner in both the row direction and the column direction.

[0013] Wherein, the cross-sectional shapes and areas of the plurality of convexes are the same, the distance between adjacent convexes is greater than or equal to 10 μm and less than or equal to 150 μm; and / or, the height of the convex is greater than the aperture of the micropore.

[0014] Wherein, the concave part is arranged on the liquid absorption surface; the concave part includes a plurality of first grooves extending along a first direction and a plurality of second grooves extending along a second direction, and the plurality of first grooves and the plurality of second grooves are arranged in a cross manner; there is a bump between two adjacent first grooves and between two adjacent second grooves.

[0015] Wherein, the bottom surface of the concave part has a plurality of bumps arranged in an array.

[0016] Wherein, the plurality of micropores are arranged in an array, each first groove corresponds to one row or multiple rows of the micropores, and each second groove corresponds to one column or multiple columns of the micropores.

[0017] Wherein, multiple rows of the bumps and multiple rows of the micropores are arranged alternately, and multiple columns of the bumps and multiple columns of the micropores are arranged alternately.

[0018] Wherein, the dense matrix is provided with a micropore array region and a blank region arranged around the micropore array region, the plurality of micropores are arranged in the micropore array region, and the concave part corresponds to the entire micropore array region.

[0019] Wherein, the end surface of the bump away from the bottom surface of the concave part is flush with the liquid absorption surface of the blank region.

[0020] Wherein, the cross-section of the bump is square, and the cross-section of the micropore is circular.

[0021] Wherein, the plurality of micropores all extend to the end surface of the bump away from the liquid absorption surface;

[0022] Or, the ports of multiple ones of the micropores away from the atomization surface are all disposed on the bottom surface of the recessed portion;

[0023] Or, a part of the multiple micropores extend to the end face of the bump away from the liquid absorption surface, and the ports of the other part of the micropores away from the atomization surface are disposed on the bottom surface of the recessed portion.

[0024] Wherein, the cross-sectional shapes and areas of the multiple bumps are the same, and the distance between adjacent bumps is greater than or equal to 10 μm and less than or equal to 150 μm; and / or, the height of the bump is greater than the pore diameter of the micropore.

[0025] Wherein, the heating element further includes a heating element, and the heating element is disposed on the atomization surface.

[0026] Wherein, the recessed portion or the protruding portion completely covers the area corresponding to the heating element.

[0027] Wherein, the dense matrix is glass, dense ceramic or silicon.

[0028] Wherein, the thickness of the dense matrix is 0.1 mm - 1 mm.

[0029] Wherein, the pore diameter of the micropore is 1 μm - 100 μm.

[0030] Wherein, the ratio of the thickness of the dense matrix to the pore diameter of the micropore is 20:1 - 3:1.

[0031] Wherein, the ratio of the center-to-center distance between adjacent micropores to the pore diameter of the micropore is 3:1 - 1.5:1.

[0032] To solve the above technical problems, the second technical solution provided by the present application is: to provide an atomizer, including a liquid storage cavity and a heating element; the liquid storage cavity is used for storing an aerosol generation matrix; the heating element is in fluid communication with the liquid storage cavity, and the heating element is used for atomizing the aerosol generation matrix; the heating element is the heating element described in any one of the above.

[0033] To solve the above technical problems, the third technical solution provided by the present application is: to provide an electronic atomization device, including an atomizer and a main body; the atomizer is the atomizer described above; the main body is used for providing electrical energy for the operation of the atomizer.

[0034] The heating element, atomizer and electronic atomization device provided by the present application, the heating element includes a dense matrix; the dense matrix has a liquid absorption surface and an atomization surface arranged oppositely; a plurality of micropores are arranged on the dense matrix, and the micropores are through holes penetrating the liquid absorption surface and the atomization surface; wherein, a convex portion or a concave portion is arranged on the liquid absorption surface to promote the detachment of air bubbles on the liquid absorption surface, so as to avoid the blockage of liquid supply by air bubbles on the liquid absorption surface, and further avoid dry burning of the heating element. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0036] Figure 1 It is a schematic structural diagram of an embodiment of the electronic atomization device provided by the present application;

[0037] Figure 2 It is a schematic structural diagram of an atomizer provided by an embodiment of the present application;

[0038] Figure 3 It is a schematic structural diagram of the first embodiment of the heating element provided by the present application;

[0039] Figure 4 is Figure 3 A schematic structural diagram of the dense matrix of the heating element provided as viewed from the liquid absorption surface side;

[0040] Figure 5 is Figure 3 A schematic structural diagram of the dense matrix of the heating element provided as viewed from the atomization surface side;

[0041] Figure 6 is Figure 4 A partial enlarged schematic diagram;

[0042] Figure 7 is Figure 3 A schematic cross-sectional structural diagram of the dense matrix of the heating element provided;

[0043] Figure 8 is Figure 7 A partial enlarged schematic diagram;

[0044] Figure 9a It is a schematic structural diagram of the second embodiment of the heating element provided by the present application as viewed from the liquid absorption surface side;

[0045] Figure 9b is Figure 9a A partial enlarged view;

[0046] Figure 10 It is a partial enlarged structural schematic diagram of the third embodiment of the heating element provided by this application;

[0047] Figure 11 It is a partial enlarged structural schematic diagram of the fourth embodiment of the heating element provided by this application;

[0048] Figure 12 It is a partial enlarged structural schematic diagram of the fifth embodiment of the heating element provided by this application;

[0049] Figure 13 is Figure 12 A cross-sectional schematic diagram of the heating element provided along the A-A direction. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0051] In the following description, specific details such as specific system structures, interfaces, and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand this application.

[0052] 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 specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of the described features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. The terms "including" and "having" in the embodiments of this application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes unlisted steps or units, or optionally further includes other steps or components inherent to these processes, methods, products, or devices.

[0053] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0054] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0055] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an embodiment of an electronic atomization device provided by the present application. In this embodiment, an electronic atomization device 100 is provided. The electronic atomization device 100 can be used for atomizing an aerosol generation substrate. The electronic atomization device 100 includes an atomizer 1 and a main body 2 that are electrically connected to each other.

[0056] Among them, the atomizer 1 is used for storing an aerosol generation substrate and atomizing the aerosol generation substrate to form an aerosol for a user to inhale. The atomizer 1 can be specifically used in different fields, such as medical, beauty, recreational inhalation, etc.; in a specific embodiment, the atomizer 1 can be used in an electronic aerosolization device to atomize an aerosol generation matrix and generate an aerosol for a smoker to inhale. The following embodiments will take this recreational inhalation as an example; of course, in other embodiments, the atomizer 1 can also be applied to a hairspray device to atomize hairspray for hair styling; or applied to a device for treating upper and lower respiratory diseases to atomize medical drugs.

[0057] For the specific structure and function of the atomizer 1, reference can be made to the specific structure and function of the atomizer 1 involved in any of the following embodiments, and the same or similar technical effects can be achieved, which will not be elaborated here.

[0058] The main body 2 includes a battery (not shown in the figure) and a controller (not shown in the figure). The battery is used to provide electrical energy for the operation of the atomizer 1 so that the atomizer 1 can atomize the aerosol generation substrate to form an aerosol; the controller is used to control the operation of the atomizer 1. The main body 2 further includes other components such as a battery holder and an airflow sensor.

[0059] The atomizer 1 and the main body 2 can be integrally provided or detachably connected, and can be designed according to specific needs.

[0060] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of an atomizer provided by an embodiment of the present application.

[0061] The atomizer 1 includes a shell 10, an atomizer seat 11 and a heating element 12. The shell 10 has a liquid storage chamber 13 and an air outlet channel 14. The liquid storage chamber 13 is used to store a liquid aerosol-generating matrix, and the liquid storage chamber 13 is arranged around the air outlet channel 14. The end of the shell 10 also has a suction port 15, and the suction port 15 is connected to the air outlet channel 14; specifically, the suction port 15 can be formed by a port of the air outlet channel 14. The shell 10 has a receiving chamber 16 on the side of the liquid storage chamber 13 away from the suction port 15, and the atomizer seat 11 is arranged in the receiving chamber 16. The atomizer seat 11 includes an atomizer top seat 111 and an atomizer base 112. The atomizer top seat 111 and the atomizer base 112 cooperate to form a receiving chamber 113; that is, the atomizer seat 11 has a receiving chamber 113. The heating element 12 is arranged in the receiving chamber 113, and is arranged in the receiving chamber 16 together with the atomizer seat 11.

[0062] Two lower liquid channels 114 are provided on the atomizing top seat 111. Specifically, two lower liquid channels 114 are provided on the top wall of the atomizing top seat 111, and the two lower liquid channels 114 are provided on both sides of the gas outlet channel 14. One end of the lower liquid channel 114 is in communication with the liquid storage chamber 13, and the other end is in communication with the receiving chamber 113, that is, the lower liquid channel 114 enables the liquid storage chamber 13 to communicate with the receiving chamber 113, so that the aerosol generating substrate in the liquid storage chamber 13 enters the heating element 12 through the lower liquid channel 114. In other words, the heating element 12 is in fluid communication with the liquid storage chamber 13, and the heating element 12 is used to absorb and heat the atomized aerosol generating substrate.

[0063] In this embodiment, the surface of the heating element 12 away from the liquid storage chamber 13 is the atomization surface, and an atomization chamber 115 is formed between the atomization surface of the heating element 12 and the inner wall surface of the receiving chamber 113, and the atomization chamber 115 is connected to the air outlet channel 14. An air inlet 116 is provided on the atomization base 112 to connect the outside with the atomization chamber 115. External gas enters the atomization chamber 115 through the air inlet 116, carries the atomized aerosol of the heating element 12 into the air outlet channel 14, and finally reaches the suction port 15 to be inhaled by the user.

[0064] The atomizer 1 further comprises a conducting member 17, which is fixed to the atomizing base 112. One end of the conducting member 17 is electrically connected to the heating element 12, and the other end is used to be electrically connected to the host 2, so that the heating element 12 can work.

[0065] The atomizer 1 further includes a heating element seal 18 and a sealing top cover 19. The heating element seal 18 is disposed between the heating element 12 and the atomizing top seat 111, and is used to seal between the heating element 12 and the liquid supply channel 114 to prevent liquid leakage; that is, the heating element seal 18 is used to seal the periphery of the heating element 12. The sealing top cover 19 is disposed on the surface of the atomizing top seat 111 close to the liquid storage cavity 13, and is used to seal between the liquid storage cavity 13, the atomizing top seat 111, and the air outlet channel 14 to prevent liquid leakage. Optionally, the materials of the heating element seal 18 and the sealing top cover 19 are silicone or fluororubber.

[0066] Please refer to Figures 3 - 8 , Figure 3 which is a schematic structural diagram of the first embodiment of the heating element provided by the present application, Figure 4 is Figure 3 a schematic structural diagram of the dense matrix of the heating element provided by Figure 5 viewed from the liquid absorption surface side, Figure 3 a schematic structural diagram of the dense matrix of the heating element provided by Figure 6 viewed from the atomizing surface side, Figure 4 a partial enlarged schematic diagram of Figure 7 is Figure 3 a schematic cross-sectional structural diagram of the dense matrix of the heating element provided by Figure 8 is Figure 7 a partial enlarged schematic diagram of

[0067] In one embodiment, the heating element 12 includes a dense matrix 121, a heating element 122, a positive electrode 123, and a negative electrode 124 (as Figure 3 shown). The dense matrix 121 has a liquid absorption surface 1211 and an atomizing surface 1212 which are oppositely arranged. A plurality of micropores 1213 are provided on the dense matrix 121, and the micropores 1213 are through holes penetrating the liquid absorption surface 1211 and the atomizing surface 1212. The micropores 1213 are used to guide the aerosol generating matrix from the liquid absorption surface 1211 to the atomizing surface 1212; specifically, a plurality of micropores 1213 can be arranged on the entire surface of the dense matrix 121 in an array arrangement, or a plurality of micropores 1213 can be arranged on only a part of the surface of the dense matrix 121 in an array arrangement. One end of the heating element 122 is electrically connected to the positive electrode 123, and the other end of the heating element 122 is electrically connected to the negative electrode 124; the positive electrode 123 and the negative electrode 124 are used to be electrically connected to the host 2. The heating element 122 can be a heating sheet, a heating film, a heating mesh, etc., as long as it can heat and atomize the aerosol generating matrix. The heating element 122 can be disposed on the atomizing surface 1212 or buried inside the dense matrix 121, and is specifically designed according to needs.

[0068] In another embodiment, the dense matrix 121 itself can generate heat. For example, a ceramic heating element that generates heat by itself, and in this case, there is no need to separately provide a heating element.

[0069] See Figure 3 Figure 3 , in this embodiment, the heating element 122 is disposed on the atomization surface 1212; the positive electrode 123 and the negative electrode 124 are disposed on the atomization surface 1212 to facilitate electrical connection with the host 2. In this embodiment, a plurality of micropores 1213 are disposed on only a partial surface of the dense matrix 121 in an array arrangement. Specifically, the dense matrix 121 is provided with a micropore array region 1214 and a blank region 1215 disposed around the micropore array region 1214 for one week. The micropore array region 1214 has a plurality of micropores 1213; the heating element 122 is disposed in the micropore array region 1214 to heat and atomize the aerosol generating matrix; the positive electrode 123 and the negative electrode 124 are disposed in the blank region 1215 of the atomization surface 1212 to ensure the stability of the electrical connection between the positive electrode 123 and the negative electrode 124.

[0070] By providing the micropore array region 1214 on the dense matrix 121 and the blank region 1215 disposed around the micropore array region 1214 for one week, it can be understood that no micropores 1213 are provided on the blank region 1215, reducing the number of micropores 1213 on the dense matrix 121, thereby improving the strength of the dense matrix 121 in the heating element 12 and reducing the production cost of providing the micropores 1213 on the dense matrix 121. The micropore array region 1214 in the dense matrix 121 serves as an atomization region, covering the heating element 122 and the peripheral region of the heating element 122, that is, substantially covering the region reaching the temperature of the aerosol generating matrix for atomization, making full use of the thermal efficiency.

[0071] It can be understood that the size of the region around the micropore array region 1214 of the dense matrix 121 in this application is larger than the pore diameter of the micropores 1213 to be called the blank region 1215; that is, the blank region 1215 in this application is a region where micropores 1213 can be formed but are not formed, rather than a region around the micropore array region 1214 where micropores 1213 cannot be formed. In one embodiment, the distance between the micropore 1213 closest to the side line of the dense matrix 121 and the side line of the dense matrix 121 is greater than the pore diameter of the micropores 1213, and only then is it considered that a blank region 1215 is provided in the circumferential direction of the micropore array region 1214.

[0072] In this embodiment, the material of the dense matrix 121 is glass, dense ceramic or silicon. When the material of the dense matrix 121 is glass, it can be one of ordinary glass, quartz glass, borosilicate glass, and photosensitive lithium aluminosilicate glass. Preferably, it is borosilicate glass or photosensitive lithium aluminosilicate glass. The shape of the dense matrix 121 can be flat, cylindrical, arc-shaped, etc., and is specifically designed according to needs. For example, Figure 3 The provided dense matrix 121 of the heating element 12 is flat.

[0073] The dense matrix 121 can be set to a regular shape, such as a rectangular plate shape, a circular plate shape, etc. In this embodiment, a plurality of micropores 1213 provided on the dense matrix 121 are arranged in an array; that is, the plurality of micropores 1213 provided on the dense matrix 121 are regularly arranged, and the center-to-center distance between adjacent micropores 1213 among the plurality of micropores 1213 is the same. Optionally, the plurality of micropores 1213 are arranged in a rectangular array; or the plurality of micropores 1213 are arranged in a circular array; or the plurality of micropores 1213 are arranged in a hexagonal array. Among them, the pore diameters of the plurality of micropores 1213 can be the same or different, and are designed according to needs.

[0074] The extending direction of the micropore 1213 can be perpendicular to the thickness direction of the dense matrix 121, or can form an angle with the thickness direction of the dense matrix 121, and the range of the angle is 80 degrees - 90 degrees. The longitudinal section of the micropore 1213 can be rectangular, trapezoidal, dumbbell-shaped with large ends and small middle, etc. The longitudinal section shape and the extending direction of the micropore 1213 can be designed according to needs. Since the micropore 1213 is set in a regular geometric shape, the volume of the micropore 1213 in the heating element 12 can be calculated, and thus the porosity of the entire heating element 12 can also be calculated, so that the consistency of the porosity of the heating element 12 of the same type of product can be well guaranteed.

[0075] The thickness of the dense matrix 121 is the distance between the liquid absorption surface 1211 and the atomization surface 1212. The thickness of the dense matrix 121 is 0.1 mm - 1 mm. When the thickness of the dense matrix 121 is greater than 1 mm, the liquid supply requirement cannot be met, resulting in a decrease in the aerosol amount, and a large amount of heat loss is caused, and the cost of setting the micropores 1213 is high; when the thickness of the dense matrix 121 is less than 0.1 mm, the strength of the dense matrix 121 cannot be guaranteed, which is not conducive to improving the performance of the electronic atomization device. Preferably, the thickness of the dense matrix 121 is 0.2 mm - 0.5 mm. The pore diameter of the micropores 1213 on the dense matrix 121 is 1 μm - 100 μm. When the pore diameter of the micropores 1213 is less than 1 μm, the liquid supply requirement cannot be met, resulting in a decrease in the aerosol amount; when the pore diameter of the micropores 1213 is greater than 100 μm, the aerosol generation matrix easily flows out from the micropores 1213 to cause liquid leakage, resulting in a decrease in the atomization efficiency. Preferably, the pore diameter of the micropores 1213 is 20 μm - 50 μm. It can be understood that the thickness of the dense matrix 121 and the pore diameter of the micropores 1213 are selected according to actual needs.

[0076] The ratio of the thickness of the dense matrix 121 to the pore diameter of the micropores 1213 is 20:1 - 3:1; preferably, the ratio of the thickness of the dense matrix 121 to the pore diameter of the micropores 1213 is 15:1 - 5:1. When the ratio of the thickness of the dense matrix 121 to the pore diameter of the micropores 1213 is greater than 20:1, the aerosol generation matrix supplied by the capillary action of the micropores 1213 is difficult to meet the atomization demand of the heating element 12, which not only easily leads to dry burning, but also the amount of aerosol generated by a single atomization decreases; when the ratio of the thickness of the dense matrix 121 to the pore diameter of the micropores 1213 is less than 3:1, the aerosol generation matrix easily flows out of the micropores 1213, resulting in waste, leading to a decrease in atomization efficiency, and further reducing the total amount of aerosol.

[0077] The ratio of the center-to-center distance between adjacent two micropores 1213 to the pore diameter of the micropores 1213 is 3:1 - 1.5:1, so as to improve the strength of the dense matrix 121 as much as possible on the premise of meeting the liquid supply capacity of the micropores 1213 on the dense matrix 121; preferably, the ratio of the center-to-center distance between adjacent two micropores 1213 to the pore diameter of the micropores 1213 is 3:1 - 2:1; more preferably, the ratio of the center-to-center distance between adjacent two micropores 1213 to the pore diameter of the micropores 1213 is 3:1 - 2.5:1.

[0078] It can be understood that the specific settings of the thickness of the dense matrix 121, the pore diameter of the micropores 1213 on the dense matrix 121, the ratio of the thickness of the dense matrix 121 to the pore diameter of the micropores 1213, and the ratio of the center-to-center distance between adjacent two micropores 1213 to the pore diameter of the micropores 1213 can be designed according to needs.

[0079] In this application, a convex portion 125 or a concave portion 126 is provided on the liquid absorption surface 1211 to promote the detachment of bubbles on the liquid absorption surface 1211, thereby preventing the bubbles on the liquid absorption surface 1211 from blocking the aerosol generation matrix in the liquid storage cavity 13 from entering the heating element 12, and further preventing the heating element 12 from dry burning. Specifically, the convex portion 125 or the concave portion 126 has capillary action and can conduct liquid horizontally along the liquid absorption surface 1211, thereby promoting the detachment of bubbles on the liquid absorption surface 1211.

[0080] In this embodiment, a concave portion 126 is provided on the liquid absorption surface 1211, and a specific introduction thereof is as follows.

[0081] See Figure 4 and Figure 6, the recess 126 is disposed in the micropore array region 1214. The recess 126 includes a plurality of first grooves 1261 extending in a first direction and a plurality of second grooves 1262 extending in a second direction. The plurality of first grooves 1261 and the plurality of second grooves 1262 are arranged in a cross pattern. There is a bump 1263 disposed on the bottom surface of the recess 126 between two adjacent first grooves 1261 and between two adjacent second grooves 1262. The number of the plurality of first grooves 1261 is greater than 2, and the number of the plurality of second grooves 1262 is greater than 2. The plurality of first grooves 1261 and the plurality of second grooves 1262 cross each other, having a plurality of bumps 1263; that is, the bottom surface of the recess 126 has a plurality of bumps 1263. In the present embodiment, the plurality of bumps 1263 are arranged in an array; that is, the plurality of bumps 1263 are regularly arranged, and the center distance between adjacent bumps 1263 is the same. In other embodiments, the plurality of bumps 1263 may be distributed in other forms as long as it can promote the detachment of the bubbles on the liquid absorption surface 1211.

[0082] In the present embodiment, the plurality of micropores 1213 are arranged in an array. Each first groove 1261 corresponds to one row or multiple rows of micropores 1213; that is, a first groove 1261 is formed corresponding to one row or multiple rows of micropores 1213. Each second groove 1262 corresponds to one column or multiple columns of micropores 1213. Further, that is, a second groove 1262 is formed corresponding to one column or multiple columns of micropores 1213. Multiple rows of bumps 1263 and multiple rows of micropores 1213 are alternately arranged, and multiple columns of bumps 1263 and multiple columns of micropores 1213 are alternately arranged.

[0083] See Figure 6 , the cross section of the bump 1263 is square, so that the capillary forces between adjacent bumps 1263 are substantially the same; that is, the distance between adjacent first grooves 1261 is the same as the distance between adjacent second grooves 1262, which is convenient for processing. The cross section of the micropore 1213 is circular. It can be understood that the cross-sectional shape of the bump 1263 can be designed as needed as long as it can make the capillary forces exist between the plurality of bumps 1263 to achieve lateral liquid conduction and promote the detachment of the bubbles on the liquid absorption surface 1211.

[0084] See Figure 7 and Figure 8, a part of the plurality of micropores 1213 in the dense matrix 121 extends to the end face of the bump 1263 away from the liquid suction surface 1211, and the ports of the other part of the micropores 1213 away from the atomization surface 1212 are arranged on the bottom surface of the recess 126. Since the recess 126 includes a plurality of first grooves 1261 and a plurality of second grooves 1262, the bottom surface of the recess 126 is the bottom surface of the first grooves 1261 and the bottom surface of the second grooves 1262. It can be understood that for this embodiment, a plurality of micropores 1213 can be formed by drilling holes in the dense matrix 121 first, and then a recess 126 can be formed by grooving on the liquid suction surface 1211 of the dense matrix 121. While forming a plurality of first grooves 1261 and a plurality of second grooves 1262 according to the setting, a plurality of bumps 1263 are formed, forming a heating element as shown in Figures 6 - 8 ; wherein, before grooving, both the liquid suction surface 1211 and the atomization surface 1212 of the dense matrix 121 are smooth planes and are arranged in parallel. In this embodiment, each first groove 1261 and each second groove 1262 are arranged corresponding to a row of micropores 1213 or a column of micropores 1213, each row of bumps 1263 or each column of bumps 1263 are arranged corresponding to a row of micropores 1213 or a column of micropores 1213, and each bump 1263 is arranged corresponding to one micropore 1213.

[0085] It can be understood that the end face of the bump 1263 away from the bottom surface of the recess 126 is flush with the liquid suction surface 1211 corresponding to the blank area 1215 formed by forming the bump 1263 by opening a plurality of first grooves 1261 and a plurality of second grooves 1262; when other structures are assembled on the liquid suction surface 1211 of the heating element 12, the bump 1263 can play a supporting role and can prevent the structure from blocking all the micropores 1213.

[0086] When the external gas enters the heating element 12 through the micropores 1213, bubbles are formed on the liquid suction surface 1211. Some bubbles are located on the end face of the bump 1263. The end face area of the bump 1263 is small, the bubble attachment area is small, the bubbles are not easy to grow and are easy to fall off; some bubbles are located on the bottom surface of the recess 126. The surrounding bumps 1263 prevent the bubbles from continuing to extend to the surrounding micropores 1213, avoiding affecting the liquid inlet of more micropores 1213, and the capillary force between the bumps 1263 helps the liquid aerosol generation matrix on the liquid suction surface 1211 to flow, so that the bubbles break away.

[0087] That is to say, the first groove 1261, the second groove 1262, and the bump 1263 in the recess 126 form a blocking structure, which prevents bubbles from growing on the liquid absorption surface 1211 of the heating element 12, thereby avoiding the dry-burning phenomenon caused by the blocked micropores 1213 due to the growing bubbles. At the same time, this structure can also help the bubbles quickly detach from the liquid absorption surface 1211 of the heating element 12. The gaps between the multiple bumps 1263 of this structure, or the first groove 1261 and the second groove 1262, have capillary forces that can also perform liquid replenishment laterally, avoiding dry burning caused by excessive local temperature of the heating element 12. It can be understood that during the lateral liquid replenishment between the multiple bumps 1263, the bubbles on the liquid absorption surface 1211 are discharged.

[0088] Among them, the cross-sectional shapes and areas of the multiple bumps 1263 are the same, and the distance between adjacent bumps 1263 is greater than or equal to 10 μm and less than or equal to 150 μm, so as to form capillary forces between the multiple bumps 1263 to promote bubble detachment and simultaneously achieve lateral liquid replenishment. That is, the widths of the multiple first grooves 1261 and the multiple second grooves 1262 are greater than or equal to 10 μm and less than or equal to 150 μm. The multiple first grooves 1261 and the multiple second grooves 1262 have capillary forces to achieve lateral liquid replenishment and simultaneously promote bubble detachment. And / or, the height of the bump 1263 is greater than the aperture of the micropore 1213 to prevent the height of the bump 1263 from being too low and the bubbles growing from the end face of the bump 1263 to the bottom surface of the recess 126. Preferably, the distance between adjacent bumps 1263 is greater than or equal to 10 μm and less than or equal to 150 μm, and at the same time, the height of the bump 1263 is greater than the aperture of the micropore 1213.

[0089] It can be understood that the micropores 1213 divert the aerosol-forming matrix from the liquid absorption surface 1211 to the atomization surface 1212, so that the aerosol-forming matrix is atomized by the heating element 122 on the atomization surface 1212 to generate aerosol. In order to avoid the influence of bubbles on the liquid absorption surface 1211 on atomization, the blocking structure - the recess 126 that prevents bubbles from growing on the liquid absorption surface 1211 completely covers the area corresponding to the heating element 122.

[0090] Please refer to Figure 9a and Figure 9b , Figure 9a which is a schematic structural diagram of the second embodiment of the heating element provided by the present application as viewed from the liquid absorption surface side, Figure 9b is Figure 9a a partial enlarged view of

[0091] Figure 9a The provided heating element 12 and Figure 3The structures of the provided heating elements 12 are basically the same, and a recess 126 is provided on the liquid absorption surface 1211 of the heating element 12 to promote the detachment of bubbles on the liquid absorption surface 1211. The difference is that the ports of all the micropores 1213 far from the atomization surface 1212 are arranged on the bottom surface of the recess 126, that is, no micropores 1213 are provided on the convex block 1263 (as Figure 9b shown). Figure 9a For the same parts of the provided heating element 12 and Figure 3 the provided heating element 12, refer to the above introduction and will not be elaborated here.

[0092] In this embodiment, the cross-sectional shapes and areas of the plurality of convex blocks 1263 are the same, and the distance between adjacent convex blocks 1263 is greater than or equal to 10 μm and less than or equal to 150 μm. That is, the widths of the plurality of first grooves 1261 and the plurality of second grooves 1262 are less than 100 μm, so as to form a capillary force between the plurality of convex blocks 1263, promote the detachment of bubbles, and realize lateral liquid replenishment at the same time.

[0093] It can be understood that for this embodiment, a plurality of micropores 1213 can be formed by drilling holes in the dense matrix 121 first, and the plurality of micropores 1213 are arranged in a regular array; then, grooves are formed at the positions corresponding to the plurality of micropores 1213 on the liquid absorption surface 1211 of the dense matrix 121 to form a recess 126. Specifically, a plurality of first grooves 1261 are formed along the row direction of the plurality of micropores 1213, and a plurality of second grooves 1262 are formed along the column direction of the plurality of micropores 1213. When grooving, a plurality of convex blocks 1263 are formed, forming a heating element 12 as shown in Figure 9a and Figure 9b No micropores 1213 are provided in the convex block 1263 and the area of the dense matrix 121 corresponding to the convex block 1263, and the plurality of micropores 1213 all extend to the bottom surface of the recess 126. Among them, before grooving, the liquid absorption surface 1211 and the atomization surface 1212 of the dense matrix 121 are both smooth planes and are arranged in parallel. In this embodiment, the distance between adjacent first grooves 1261 is the same as the distance between two adjacent micropores 1213 in the column direction, and the distance between adjacent second grooves 1262 is the same as the distance between two adjacent micropores 1213 in the row direction (as Figure 9b shown).

[0094] Please refer to Figure 10 , Figure 10 which is a partial enlarged structural schematic diagram of the third embodiment of the heating element provided by this application.

[0095] Figure 10 The provided heating element 12 and Figure 9a and Figure 9b the provided heating element 12 have basically the same structure. The difference is that: Figure 9a andFigure 9b In the heating element 12, there is only one micro-hole 1213 between adjacent bumps 1263; Figure 10 In the heating element 12, there are two micro-holes 1213 between adjacent bumps 1263. Figure 10 For the same parts of the heating element 12 provided and Figure 9a and Figure 9b the heating element 12 provided, refer to the above introduction and will not be elaborated here.

[0096] In this embodiment, each first groove 1261 and each second groove 1262 are both arranged corresponding to two rows or two columns of micro-holes 1213 (as shown in Figure 10 ). It can be understood that for the multiple bumps 1263 formed by multiple first grooves 1261 and multiple second grooves 1262, the number of micro-holes 1213 between the multiple bumps 1263 can be designed as needed, as long as it can promote the detachment of the bubbles on the liquid absorption surface 1211.

[0097] Please refer to Figure 11 , Figure 11 which is a partial enlarged structural schematic diagram of the fourth embodiment of the heating element provided by this application.

[0098] Figure 11 For the same parts of the heating element 12 provided and Figure 3 the heating element 12 provided, refer to the above introduction and will not be elaborated here. The structures are basically the same, and a recess 126 is provided on the liquid absorption surface 1211 of the heating element 12 to promote the detachment of the bubbles on the liquid absorption surface 1211. The difference is that all the micro-holes 1213 extend to the end face of the bump 1263 away from the liquid absorption surface 1211, and there are no micro-holes 1213 on the bottom surface of the recess 126. Figure 11 For the same parts of the heating element 12 provided and Figure 3 the heating element 12 provided, refer to the above introduction and will not be elaborated here. In this embodiment, each bump 1263 is arranged corresponding to one micro-hole 1213 (as shown in Figure 11 ).

[0099] In this embodiment, the height of the bump 1263 is greater than the aperture of the micro-hole 1213, so as to prevent the height of the bump 1263 from being too low, and the bubbles grow from the end face of the bump 1263 to the bottom surface of the recess 126, thus realizing the promotion of bubble detachment.

[0100] It can be understood that for this embodiment, multiple micropores 1213 can be formed by drilling holes in the dense matrix 121 first, and the multiple micropores 1213 are distributed in a regular array; then grooves are formed between the micropores 1213 on the liquid absorption surface 1211 of the dense matrix 121 to form a recessed part 126. Specifically, a first groove 1261 is opened in the row direction between every two adjacent rows of micropores 1213, and a second groove 1262 is opened in the column direction between every two adjacent columns of micropores 1213. Multiple bumps 1263 are formed while grooving, forming a heating element 12 as shown in Figure 11 . Only the bumps 1263 and the area of the dense matrix 121 corresponding to the bumps 1263 are provided with micropores 1213, and the multiple micropores 1213 all extend to the end face of the bump 1263 far from the liquid absorption surface 1211. Among them, before grooving, both the liquid absorption surface 1211 and the atomization surface 1212 of the dense matrix 121 are smooth planes and are arranged in parallel.

[0101] Please refer to Figure 12 and Figure 13 , Figure 12 which is a partial enlarged structural schematic diagram of the fifth embodiment of the heating element provided by this application, Figure 13 and Figure 12 is a cross-sectional schematic diagram of the heating element provided by

[0102] Figure 12 along the A-A direction. Figure 3 The heating element 12 provided by Figure 12 is basically the same as the heating element 12 provided by Figure 3 , and the same parts are as described above and will not be repeated.

[0103] In this embodiment, the raised portion 125 includes multiple raised portions 1251 provided on the liquid absorption surface 1211, and at least two raised portions 1251 are provided around each micropore 1213. When air enters through the micropores 1213 and bubbles are generated on the liquid absorption surface 1211, at least two raised portions 1251 around the micropores 1213 prevent the bubbles from continuing to extend to the surrounding micropores 1213, thereby avoiding affecting the liquid intake of more micropores 1213. A capillary force is formed between the raised portions 1251, enabling the aerosol generation matrix to flow on the liquid absorption surface 1211 and helping the bubbles to detach. Preferably, four raised portions 1251 are evenly distributed around each micropore 1213, which has a better effect of blocking the growth of bubbles and is conducive to the detachment of bubbles from the liquid absorption surface 1211.

[0104] It can be understood that the micro-holes 1213 guide the aerosol-forming substrate from the liquid suction surface 1211 to the atomization surface 1212, so that the aerosol-forming substrate is atomized by the heating element 122 on the atomization surface 1212 to generate aerosol; in order to avoid the influence of bubbles on the liquid suction surface 1211 on atomization, the blocking structure - the raised portion 125 that prevents the growth of bubbles on the liquid suction surface 1211 completely covers the area corresponding to the heating element 122.

[0105] For this embodiment, a plurality of micro-holes 1213 can be formed by drilling holes in the dense substrate 121, and the plurality of micro-holes 1213 are distributed in a regular array; then, a protrusion 1251 is provided at the blank space between the plurality of micro-holes 1213 on the liquid suction surface 1211 of the dense substrate 121 to form a heating element 12 as shown in Figure 12 Figure 12. In this embodiment, the protrusion 1251 is only provided at the blank space between the micro-holes 1213 and is not provided above the micro-holes 1213, and the protrusion 1251 can be formed by electroplating and thickening. The protrusion 1251 can be a square column, a cylinder, a hemisphere, etc., and is specifically designed according to needs.

[0106] In this embodiment, the plurality of protrusions 1251 and the plurality of micro-holes 1213 are both distributed in an array. Further, the plurality of protrusions 1251 and the plurality of micro-holes 1213 are misaligned in the row direction and the column direction, so that at least two protrusions 1251 can be evenly distributed around each micro-hole 1213, and compared with the case where the plurality of protrusions 1251 and the plurality of micro-holes 1213 are arranged in the same row or the same column, more micro-holes 1213 and protrusions 1251 can be formed on the atomization surface of the same area.

[0107] Among them, the cross-sectional shapes and areas of the plurality of protrusions 1251 are the same, and the distance between adjacent protrusions 1251 is greater than or equal to 10 μm and less than or equal to 150 μm, so as to form a capillary force between the plurality of protrusions 1251 to promote the detachment of bubbles and at the same time realize lateral liquid replenishment. And / or, the height of the protrusion 1251 is greater than the aperture of the micro-hole 1213 to avoid that the height of the protrusion 1251 is too low to achieve the blocking effect on the growth of bubbles. Preferably, the distance between adjacent protrusions 1251 is greater than or equal to 10 μm and less than or equal to 150 μm, and at the same time, the height of the protrusion 1251 is greater than the aperture of the micro-hole 1213.

[0108] The above is only the embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A heating element, characterized in that, it includes: A dense matrix having a liquid absorption surface and an atomization surface arranged opposite to each other; a plurality of micropores are provided on the dense matrix, and the micropores are through holes penetrating the liquid absorption surface and the atomization surface; A heating element is arranged on the atomization surface; Wherein, a convex portion or a concave portion is provided on the liquid absorption surface to promote the detachment of bubbles on the liquid absorption surface; When the convex portion is provided on the liquid absorption surface, the convex portion includes a plurality of convexes provided on the liquid absorption surface, and at least two convexes are provided around each micropore; the plurality of convexes and the plurality of micropores are both arranged in an array; the plurality of convexes and the plurality of micropores are arranged in a staggered manner in both the row direction and the column direction; the height of the convex is greater than the pore diameter of the micropore; or, When the concave portion is provided on the liquid absorption surface, the concave portion includes a plurality of first grooves extending in a first direction and a plurality of second grooves extending in a second direction, and the plurality of first grooves and the plurality of second grooves are arranged in a cross manner; there is a bump between two adjacent first grooves and two adjacent second grooves; the bottom surface of the concave portion has a plurality of bumps arranged in an array; the plurality of micropores are arranged in an array, each first groove corresponds to one row or multiple rows of micropores, and each second groove corresponds to one column or multiple columns of micropores; multiple rows of bumps and multiple rows of micropores are arranged alternately, and multiple columns of bumps and multiple columns of micropores are arranged alternately; the height of the bump is greater than the pore diameter of the micropore.

2. The heating element according to claim 1, characterized in that, The convex portion or the concave portion has a capillary force and can conduct liquid horizontally along the liquid absorption surface, thereby promoting the detachment of bubbles on the liquid absorption surface.

3. The heating element according to claim 1, characterized in that, Four evenly distributed convexes are provided around each micropore.

4. The heating element according to claim 1, characterized in that, The cross-sectional shapes and areas of the plurality of convexes are the same, and the distance between adjacent convexes is greater than or equal to 10 μm and less than or equal to 150 μm.

5. The heating element according to claim 1, characterized in that, The dense matrix is provided with a micropore array area and a blank area arranged around the micropore array area, the plurality of micropores are arranged in the micropore array area, and the concave portion is arranged in the micropore array area.

6. The heating element according to claim 5, characterized in that, The end surface of the bump away from the bottom surface of the concave portion is flush with the liquid absorption surface of the blank area.

7. The heating element according to claim 1, characterized in that, The cross-section of the bump is square, and the cross-section of the micropore is circular.

8. The heating element according to claim 1, characterized in that, The plurality of micropores all extend to the end surface of the bump away from the liquid absorption surface; Or, the ports of the plurality of micropores away from the atomization surface are all arranged on the bottom surface of the concave portion; Alternatively, a part of the plurality of micropores extends to the end face of the bump away from the liquid suction surface, and the ports of the other part of the micropores away from the atomization surface are arranged on the bottom surface of the recessed portion.

9. The heating element according to claim 1, wherein the cross-sectional shapes and areas of the plurality of bumps are the same, and the distance between adjacent bumps is greater than or equal to 10 μm and less than or equal to 150 μm.

10. The heating element according to claim 1, wherein the recessed portion or the protruding portion completely covers the area corresponding to the heating element.

11. The heating element according to claim 1, wherein the dense matrix is glass, dense ceramic or silicon.

12. The heating element according to claim 1, wherein the thickness of the dense matrix is 0.1 mm - 1 mm.

13. The heating element according to claim 1, wherein the pore diameter of the micropores is 1 μm - 100 μm.

14. The heating element according to claim 1, wherein the ratio of the thickness of the dense matrix to the pore diameter of the micropores is 20:1 - 3:

1.

15. The heating element according to claim 1, wherein the ratio of the center-to-center distance of adjacent micropores to the pore diameter of the micropores is 3:1 - 1.5:

1.

16. An atomizer, wherein it includes: a liquid storage cavity for storing an aerosol-forming substrate; a heating element, the heating element being in fluid communication with the liquid storage cavity, and the heating element being used for atomizing the aerosol-forming substrate; the heating element is the heating element according to any one of claims 1 - 15.

17. An electronic atomization device, wherein it includes: an atomizer, the atomizer being the atomizer according to claim 16; a main body for providing electrical energy for the operation of the atomizer.

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