Atomization core, atomizer, and electronic atomization device

Abstract

An atomization core (2), an atomizer (10), and an electronic atomization device. The atomization core (2) comprises a porous base body (21) and a heating element (22); the porous base body (21) has an atomization surface; the heating element (22) is arranged on the atomization surface of the porous base body (21) and is used for atomizing an aerosol generation substrate to form aerosol; the atomization surface of the porous base body (21) is provided with liquid guide grooves (212); the liquid guide grooves (212) are located on one side or two sides of the heating element (22). The atomization core (2) uses the liquid guide grooves (212) to temporarily store a certain amount of the aerosol generation substrate, and then during atomization, the aerosol generation substrate in the liquid guide grooves (212) can be quickly supplemented to the heating element (22), thereby improving the liquid supply capability of the porous base body (21), reducing the risks of local high temperature and carbon buildup caused by insufficient local liquid supply of the heating element (22), overcoming the problem that the atomization core (2) is prone to scaling, prolonging the service life of the atomization core (2), improving the vaping taste of users, and reducing the risk of liquid crackling.

Description

Atomizer core, atomizer and electronic atomization device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority based on Chinese patent application 2023115091002 filed on November 13, 2023, and all of its contents are incorporated herein by reference.

Technical field

[0003] The present invention relates to the field of electronic atomization technology, and in particular to an atomization core, an atomizer, and an electronic atomization device. [Background Technology]

[0004] Currently, atomizers include an atomizer core, which is used to atomize an aerosol-generating matrix to form an aerosol. However, existing atomizer cores are prone to fouling, which affects the service life of the atomizer core and the taste of the user before and after the puff.

[0005] [Summary of the invention]

[0006] The atomizer core, atomizer, and electronic atomization device provided in this application are intended to solve the problem that the existing atomizer core is prone to scaling, which affects the service life of the atomizer core and the taste of the user before and after inhalation.

[0007] In order to solve the above technical problems, a technical solution adopted in this application is: to provide an atomization core, which includes: a porous substrate and a heating element; wherein the porous substrate has an atomization surface; the heating element is arranged on the atomization surface of the porous substrate, and is used to atomize the aerosol generating matrix to form an aerosol; wherein the atomization surface of the porous substrate has a liquid guide groove, and the liquid guide groove is located on one side or both sides of the heating element.

[0008] In one embodiment of the present application, the liquid guiding groove is a blind groove.

[0009] In one embodiment of the present application, the aspect ratio of the liquid-conducting groove is greater than 1.5.

[0010] In one embodiment of the present application, the width of the liquid guiding groove gradually decreases in a direction away from the atomizing surface.

[0011] In one embodiment of the present application, the liquid guide groove includes a first groove portion and a second groove portion that are interconnected along its depth direction; the first groove portion is located on the side of the second groove portion close to the atomizing surface, and the width of the first groove portion gradually decreases in the direction away from the atomizing surface; the width of each position of the second groove portion is the same, and the width of the second groove portion is the same as the minimum width of the first groove portion.

[0012] In one embodiment of the present application, the length of the liquid guide groove is greater than or equal to 0.3 mm and less than or equal to 1.5 mm; the width of the liquid guide groove is greater than or equal to 0.1 mm and less than or equal to 0.5 mm; the depth of the liquid guide groove is greater than or equal to 0.2 mm and less than or equal to 2 mm; and / or the straight-line distance between the liquid guide groove and the heating element is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0013] In one embodiment of the present application, a plurality of the liquid-conducting grooves are provided on each side of the heating element; and the plurality of the liquid-conducting grooves on the same side of the heating element are spaced apart along the extension direction of the heating element.

[0014] In one embodiment of the present application, the porous matrix further has a buried hole, and two adjacent liquid-conducting grooves are connected through the buried hole.

[0015] In one embodiment of the present application, the heating element is serpentine and includes a plurality of arc-shaped portions and a plurality of linear portions arranged at intervals; two adjacent linear portions are connected by the arc-shaped portion;

[0016] Among them, the multiple liquid-conducting grooves located on the same side of the heating element include arc-shaped grooves and straight-line grooves; the arc-shaped grooves are arranged corresponding to the arc-shaped parts, and the straight-line grooves are arranged corresponding to the straight-line parts; the arc-shaped grooves and the straight-line grooves are arranged at intervals along the extension direction of the heating element or are integrally formed.

[0017] In order to solve the above technical problems, another technical solution adopted in the present application is to provide an atomizer, which includes: the atomizer core mentioned above.

[0018] In order to solve the above technical problems, another technical solution adopted in this application is: to provide an electronic atomization device, including an atomizer and a host; the atomizer is the atomizer involved above, and the host is electrically connected to the atomizer for providing power to the atomizer and controlling the operation of the atomizer.

[0019] The beneficial effects of the embodiments of the present application are different from those of the prior art: the atomizer core provided in the embodiments of the present application includes a porous substrate and a heating element; the porous substrate has an atomizing surface, and the heating element is provided on the atomizing surface of the porous substrate, which is used to atomize the aerosol generating matrix to form an aerosol; and the atomizing surface of the porous substrate has a liquid guide groove, which is located on one side or both sides of the heating element. Among them, by providing a liquid guide groove on the atomizing surface of the porous substrate, and making the liquid guide groove located on one side or both sides of the heating element; in this way, a certain amount of aerosol generating matrix can be buffered by the liquid guide groove, so that during the atomization process, the aerosol generating matrix in the liquid guide groove can be quickly replenished to the heating element, thereby improving the liquid supply capacity of the porous substrate and reducing the risk of local high temperature and carbon deposits caused by insufficient local liquid supply to the heating element, thereby effectively improving the problem of easy scaling of the atomizer core, affecting the service life of the atomizer core and the taste of the user before and after inhalation. At the same time, by setting up a liquid guide groove, the liquid surface morphology on the atomizing surface can be changed, so that the liquid film formed on the atomizing surface is concave, thereby reducing the thickness of the liquid film, thereby reducing the risk of aerosol generating matrix explosion due to excessive liquid film thickness.

Brief Description of the Drawings

[0020] FIG1 is a schematic structural diagram of an electronic atomization device provided in one embodiment of the present application;

[0021] FIG2 is a simplified structural diagram of an atomizer provided in one embodiment of the present application;

[0022] FIG3 is a schematic diagram of the overall structure of the atomizer core provided in one embodiment of the present application;

[0023] FIG4 is a top view of an atomizer core provided in one embodiment of the present application;

[0024] FIG5 is a cross-sectional view of the atomizer core M shown in FIG2 along the line AA according to an embodiment of the present application;

[0025] FIG6 is a top view of an atomizer core provided by another embodiment of the present application;

[0026] FIG7 is a top view of an atomizer core provided in another embodiment of the present application;

[0027] FIG8 is a cross-sectional view of the atomizer core M shown in FIG2 along the line AA according to another embodiment of the present application;

[0028] FIG9 is a schematic diagram of the surface structure of multiple groups of atomizer cores after a preset number of puffs.

[0029] Description of Reference Numerals

[0030] 100-Electronic atomization device;

[0031] 10-Atomizer; 1-Housing; 11-Airflow Channel; 12-Liquid Storage Tank; 2-Atomizer Core; 21-Porous Matrix; 211-Lower Liquid Tank; 212-Liquid Guide Tank; 212a-Arcuate Tank; 212b-Linear Tank; 213-First Tank Portion; 214-Second Tank Portion; 215-Buried Via; 22-Heating Element; 22a-First Linear Portion; 22b-Second Linear Portion; 22c-Third Linear Portion; 22d-First Arc-Shaped Portion; 22e-Second Arc-Shaped Portion; 3-Ejector Pin; 20-Host Unit. [Specific implementation method]

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0034] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] The atomizer core typically includes a porous matrix and a heating element disposed on the porous matrix. The porous matrix has a liquid absorption surface and an atomization surface. The liquid absorption surface is connected to a liquid storage tank that stores the aerosol-generating matrix. The aerosol-generating matrix is ​​drained from the liquid absorption surface to the atomization surface via the capillary force of the porous matrix. The heating element is disposed on the atomization surface and is used to atomize the aerosol-generating matrix to form an aerosol when power is applied. The porous matrix can be made of a high-temperature resistant material, such as porous ceramics or porous glass. The heating element is typically a metal heating film, metal mesh, metal wire, or the like.

[0036] However, after extensive research, the inventors of this application discovered that existing atomizer cores are prone to fouling, which shortens their service life. Furthermore, due to the fouling, the flavor experience varies before and after the user draws, impacting the user experience. Furthermore, due to the surface tension of the liquid, the heating element protrudes from the atomizing surface of the porous substrate. The porous substrate, through capillary action, directs the aerosol-generating matrix to the atomizing surface, where it forms a liquid film. If this film is too thick, liquid explosion can easily occur during the atomization process.

[0037] To this end, the present application provides an atomizer core, which reduces the risk of scaling and explosion of the atomizer core by providing a liquid guide groove on the atomizing surface of the porous substrate and positioning the liquid guide groove on one side or both sides of the heating element.

[0038] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0039] Please refer to Figure 1, which is a schematic diagram of the structure of an electronic atomization device provided in one embodiment of the present application. In this embodiment, an electronic atomization device 100 is provided. The electronic atomization device 100 can be used to atomize an aerosol-generating substrate. The electronic atomization device 100 includes an atomizer 10 and a host 20 that are electrically connected to each other.

[0040] Among them, the atomizer 10 is used to store the aerosol generating matrix and atomize the aerosol generating matrix to form an aerosol for the user to inhale. The atomizer 10 can be used in different fields, such as medical treatment, beauty, leisure smoking, etc. In a specific embodiment, the atomizer 10 can be used in an electronic atomization device to atomize the aerosol generating matrix and generate an aerosol for the smoker to inhale. The following embodiments all take this leisure smoking as an example. The specific structure and function of the atomizer 10 can be referred to the specific structure and function of the atomizer 10 involved in the following embodiments, and the same or similar technical effects can be achieved, which will not be repeated here.

[0041] The main unit 20 includes a battery (not shown) and a controller (not shown). The battery is used to provide electrical energy for the operation of the nebulizer 10, enabling the nebulizer 10 to atomize the aerosol-generating matrix to form an aerosol; the controller is used to control the operation of the nebulizer 10. The main unit 20 also includes other components such as a battery holder and an airflow sensor. The nebulizer 10 and main unit 20 can be integrated or detachably connected, and can be designed according to specific needs.

[0042] Please refer to Figure 2, which is a simplified structural diagram of an atomizer 10 provided in an embodiment of the present application. In this embodiment, an atomizer 10 is provided, which includes a housing 1, an atomizer core 2, a mounting seat (not shown) and a thimble 3. The housing 1 includes a mouthpiece, an air flow channel 11 and a liquid storage tank 12. The liquid storage tank 12 stores an aerosol generating matrix, and the air flow channel 11 connects the atomizer core 2 and the mouthpiece. The atomizer core 2 is connected to the liquid storage tank 12 and is used to atomize the aerosol generating matrix flowing out of the liquid storage tank 12 to form an aerosol when power is turned on. The aerosol formed by the atomization of the atomizer core 2 flows out to the mouthpiece through the air flow channel 11 for the user to inhale. The mounting seat is arranged in the housing 1, and the thimble 3 is arranged on the mounting seat and abuts the atomizer core 2 for being electrically connected to the power supply to supply power to the atomizer core 2. The power supply can be a battery or a battery assembly.

[0043] The specific structure and function of the atomizer core 2 can be found in the following description of the atomizer core 2. The other structures of the atomizer 10 are similar to those of existing atomizers, and the details can be found in the prior art.

[0044] Referring to Figures 3 to 5 , Figure 3 is a schematic diagram of the overall structure of an atomizer core provided in one embodiment of the present application; Figure 4 is a top view of an atomizer core provided in one embodiment of the present application; and Figure 5 is a cross-sectional view taken along the AA line of the atomizer core M shown in Figure 2 , provided in one embodiment of the present application. In this embodiment, an atomizer core 2 is provided, comprising a porous substrate 21 and a heating element 22.

[0045] The porous matrix 21 has multiple microporous structures, which have capillary forces. Specifically, the porosity of the porous matrix 21 is greater than or equal to 30% and less than or equal to 80%; for example, the porosity can be 30%, 40%, 50%, 60%, 70%, or 80%. The porous matrix 21 within this porosity range has a certain liquid-conducting performance, improving the liquid supply effect to the heating element 22. Moreover, the pore structure of the porous matrix 21 can absorb a certain amount of dirt (such as soot) within its pore structure, reducing the impact of soot on the heating element 22.

[0046] As shown in FIG5 , the porous substrate 21 has a liquid absorption surface and an atomization surface disposed opposite each other along its thickness direction Z. The liquid absorption surface includes a lower liquid groove 211, which is connected to the liquid storage tank 12. The aerosol-generating substrate in the liquid storage tank 12 is directed to the lower liquid groove 211. The aerosol-generating substrate in the lower liquid groove 211 is then directed to the atomization surface of the porous substrate 21 by the capillary force of the porous substrate 21. The lower liquid groove 211 extends along the thickness direction Z and can be a blind groove, meaning that the lower liquid groove 211 does not penetrate the porous substrate 21 along the thickness direction Z. The space defined by the lower liquid groove 211 can be a rectangular parallelepiped, a cube, a cylinder, an irregular polygon, or the like. Without affecting the thickness and strength of the porous substrate 21 in the thickness direction Z, the depth of the lower liquid groove 211 can be greater to improve the efficiency of the aerosol-generating substrate flowing to the atomization surface.

[0047] The porous matrix 21 can specifically be a ceramic porous matrix, a glass porous matrix, a polymer porous matrix, etc. In this embodiment, the porous matrix 21 is a porous ceramic, and the disordered pores formed in the porous ceramic during the preparation process have capillary force. In other embodiments, the porous matrix 21 is another porous structure, for example, a dense matrix is ​​provided with multiple through holes to form a porous structure, and the dense matrix can be dense ceramic, glass, etc. Specifically, the porous matrix 21 can be a regular rectangular parallelepiped or cube; or other irregular three-dimensional structures.

[0048] 3 or 4 , the heating element 22 is disposed on the atomizing surface of the porous substrate 21 for atomizing the aerosol-generating matrix flowing through the lower liquid tank 211 to the atomizing surface to form an aerosol.

[0049] The heating element 22 can have a filamentous or strip-like structure and extend in a curved shape to increase the contact area between the heating element 22 and the porous substrate 21 within the effective atomizing surface area. Specifically, the heating element 22 is screen-printed onto the atomizing surface of the porous substrate 21 and then sintered. The material of the heating element 22 includes at least one of a nickel-based alloy, an iron-based alloy, and a ruthenium-based alloy.

[0050] As shown in Figure 4, the heating element 22 is serpentine, such as extending in an "S"-shaped curve; the heating element 22 specifically includes a plurality of arc portions and a plurality of straight portions, and two adjacent straight portions are connected by the arc portion. In a specific embodiment, the heating element 22 includes a first straight portion 22a, a second straight portion 22b, a third straight portion 22c, a first arc portion 22d, and a second arc portion 22e. The first straight portion 22a, the second straight portion 22b, and the third straight portion 22c are spaced apart along the width direction Y of the porous substrate 21 and are parallel to each other, and the second straight portion 22b is located between the first straight portion 22a and the third straight portion 22c along the width direction Y of the porous substrate 21. The first arc portion 22d connects the first end of the first straight portion 22a and the first end of the second straight portion 22b respectively. The second arc portion 22e connects the second end of the second straight portion 22b and the second end of the third straight portion 22c.

[0051] In a specific embodiment, please continue to refer to Figures 3 and 4. The atomizing surface of the porous matrix 21 has a liquid guide groove 212, which is located on one side or both sides of the heating element 22. In this way, the liquid guide groove 212 can be used to cache a certain amount of aerosol-generating matrix, so that during the atomization process, the aerosol-generating matrix in the liquid guide groove 212 can be quickly replenished to the heating element 22, thereby improving the liquid supply capacity of the porous matrix 21 and reducing the risk of local high temperature and carbon deposition due to insufficient local liquid supply in the heating element 22, thereby effectively improving the atomizing core 2 from scaling, affecting the service life of the atomizing core 2 and the taste of the user before and after inhalation. At the same time, by providing the liquid guide groove 212, the liquid surface morphology on the atomizing surface can be changed, so that the liquid film formed on the atomizing surface is concave to reduce the thickness of the liquid film, thereby reducing the risk of the aerosol-generating matrix exploding due to excessive liquid film thickness.

[0052] Specifically, there can be multiple liquid-conducting grooves 212. Referring to FIG5 , the liquid-conducting grooves 212 can be blind grooves, meaning that the liquid-conducting grooves 212 do not penetrate the porous substrate 21 along the thickness direction Z of the porous substrate 21 and are not directly connected to the lower liquid tank 211. Blind grooves can buffer a certain amount of aerosol-generating matrix and have extremely low resistance, allowing for rapid liquid supply to the vicinity of the heating element 22 during atomization, thereby improving liquid supply capacity.

[0053] The aspect ratio of each liquid-conducting groove 212 is greater than 1.5. In one specific embodiment, referring to Figures 3 and 5 , the length L of the liquid-conducting groove 212 is greater than or equal to 0.3 mm and less than or equal to 1.5 mm; for example, L is 0.5 mm, 0.7 mm, 0.9 mm, 1.2 mm, or 1.5 mm. The width W of the liquid-conducting groove 212 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm; for example, W is 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm. The depth H of the liquid-conducting groove 212 is greater than or equal to 0.2 mm and less than or equal to 2 mm; for example, H is 0.2 mm, 0.5 mm, 0.8 mm, 0.9 mm, 1.3 mm, 1.6 mm, or 2 mm. Among them, the factors to be considered in the depth H and width W of the liquid guiding groove 212 mainly include: the liquid storage capacity and liquid guiding effect of the liquid guiding groove 212. The depth H and width W of the liquid guiding groove 212 have a certain liquid storage capacity within the range of the dimensions, which can meet the effect of rapid liquid supply during the atomization process; at the same time, the appropriate width W can make the liquid film thickness on the liquid surface within an appropriate range, reducing the risk of liquid explosion. It should be noted that the inventors have found that the liquid guiding groove 212 with the above-mentioned length-to-width ratio can limit the size of the bubbles formed by the atomized medium on the atomizing surface during the atomization process, and limit the bubbles that cause liquid explosion to a smaller area, further reducing the number and size of bubbles formed during the liquid explosion process. At the same time, due to the limitation of the amplitude of the liquid explosion, the liquid supply in the local area of ​​the atomizing surface is more uniform and consistent, avoiding the phenomenon of local liquid shortage and dry burning, and further slowing down and reducing the formation of scale.

[0054] It should be noted that the length L of the liquid guiding groove 212 refers to the dimension of the liquid guiding groove 212 along its extension direction; the width W of the liquid guiding groove 212 refers to the dimension of the liquid guiding groove 212 along a direction perpendicular to the extension direction of the liquid guiding groove 212; and the depth H of the liquid guiding groove 212 refers to the dimension of the liquid guiding groove 212 along its thickness direction Z.

[0055] In one embodiment, referring to FIG5 , the width W of the liquid guide groove 212 gradually decreases in the direction away from the atomizing surface. This not only facilitates the preparation and molding, but also according to the capillary principle:

[0056] Where h is the height of the liquid's rise and fall; γ is the surface tension; θ is the angle between the liquid surface and the tube wall, which depends on factors such as the type of liquid and gas and the tube wall material. For water and clean glass, θ = 0°, and for mercury and glass, θ = 140° is the contact angle; ρ is the liquid density; g is the acceleration of gravity; and r is the radius of the capillary tube. It can be seen that the smaller r, the better the capillary effect. Therefore, the bottom of the liquid guide groove 212 facing away from the atomization surface has a stronger capillary effect than the top of the liquid guide groove 212 close to the atomization surface. The aerosol-generating matrix inside the porous matrix 21 can quickly guide the liquid into the liquid guide groove 212 and quickly replenish it to the vicinity of the heating element 22 through the wider portion of the liquid guide groove 212 close to the atomization surface, thereby improving the liquid supply capacity. At the same time, the narrower portion of the liquid guide groove 212 also has a certain liquid locking ability.

[0057] In a specific embodiment, the cross section of the liquid-conducting groove 212 along the thickness direction Z is stepped, and the liquid-conducting groove 212 includes at least two groove portions with different widths along the thickness direction Z, so as to improve the liquid-conducting effect of the liquid-conducting groove 212 .

[0058] Specifically, the liquid-conducting groove 212 includes a first groove portion 213 and a second groove portion 214 that are interconnected along the thickness direction Z; along the thickness direction Z of the liquid-conducting groove 212, the first groove portion 213 is located on the side of the second groove portion 214 close to the atomizing surface, and the width of the first groove portion 213 gradually decreases in the direction away from the atomizing surface; the width of each position of the second groove portion 214 is the same, and the width of the second groove portion 214 is equal to the minimum width of the first groove portion 213. Among them, the cross-section of the first groove portion 213 along the thickness direction Z is an inverted trapezoid; the cross-section of the second groove portion 214 along the thickness direction Z is a rectangle. The widths corresponding to the positions where the first groove portion 213 and the second groove portion 214 contact are the same. Specifically, the orthographic projection of the first groove portion 213 and / or the second groove portion 214 on the atomizing surface can be circular, square, rectangular, etc.

[0059] In one specific embodiment, referring back to FIG4 , a plurality of liquid-conducting grooves 212 are provided on each side of the heating element 22; the plurality of liquid-conducting grooves 212 located on the same side of the heating element 22 are spaced apart along the extension direction of the heating element 22. Of course, in other embodiments, referring to FIG6 , which is a top view of an atomizer core provided in another embodiment of the present application; the liquid-conducting grooves 212 may also be provided on only one side of the heating element 22, such as on the left or right side of the heating element 22 along the length direction X of the porous substrate 21. The plurality of liquid-conducting grooves 212 located on that side are spaced apart along the extension direction of the heating element 22.

[0060] Among them, referring to Figure 4, the straight-line distance S between the liquid-conducting groove 212 and the heating element 22 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm. For example, S can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm. Among them, if the distance between the liquid-conducting groove 212 and the heating element 22 is too far, it is not conducive to the liquid-conducting groove 212 to quickly supply liquid to the heating element 22; and if the distance between the liquid-conducting groove 212 and the heating element 22 is too close, it may cause the risk of aerosol generation matrix explosion in the liquid-conducting groove 212. Combined with the factors of the temperature field distribution of the atomizing surface, the area around the heating element 22 is a high-temperature area, the atomization in the high-temperature area is more intense, and the probability and amplitude of explosion are greater. The liquid-conducting groove 212 is set in the above-mentioned appropriate distance area, and the effect of suppressing explosion is better.

[0061] When the heating element 22 is arranged in a serpentine pattern, the multiple liquid-conducting grooves 212 located on the same side of the heating element 22 include arcuate grooves 212a and linear grooves 212b; wherein the arcuate grooves 212a are arranged corresponding to the arcuate portion, and the linear grooves 212b are arranged corresponding to the linear portion; the arcuate grooves 212a and the linear grooves 212b are arranged at intervals along the extension direction of the heating element 22. Of course, referring to Figure 7, Figure 7 is a top view of the atomizer core provided in another embodiment of the present application; the arcuate grooves 212a and the linear grooves 212b can also be integrally formed along the extension direction of the heating element 22; in this case, it can also be understood that a liquid-conducting groove 212 includes an arcuate segment and a linear segment.

[0062] In a specific embodiment, due to temperature differences at various locations on the porous substrate 21, the atomization rate at various locations on the atomization surface of the porous substrate 21 may vary. Specifically, some areas may experience a faster atomization rate, leading to faster consumption of the aerosol-forming substrate, while other areas may experience a slower atomization rate. Therefore, it is necessary to promptly supply liquid to areas with faster atomization rates to avoid dry burning or liquid explosion.

[0063] Therefore, in one embodiment, referring to FIG8 , FIG8 is an AA sectional view of the atomizing core M shown in FIG2 provided by another embodiment of the present application. A buried hole 215 is provided in the porous matrix 21, and two adjacent liquid guide grooves 212 are connected through the buried hole 215. In this way, the aerosol generating matrix stored in each liquid guide groove 212 can flow between different liquid guide grooves 212 through the buried hole 215 to quickly supply liquid to the area with a faster atomization rate, thereby improving the liquid guiding and liquid supply capabilities of the entire atomizing surface, and avoiding dry burning caused by insufficient local liquid supply. Among them, the buried hole 215 can retain part of the aerosol generating matrix, so that the aerosol generating matrix has a larger area than the porous matrix 21, and can quickly provide the aerosol generating matrix to the atomizing surface, thereby improving the liquid guiding and liquid supply capabilities of the atomizing surface, and avoiding dry burning caused by insufficient local liquid supply.

[0064] The length and width of the buried hole 215 are substantially consistent with the length and width of the liquid guiding groove 212 .

[0065] The atomizer core 2 provided in this embodiment includes a porous substrate 21 and a heating element 22. The porous substrate 21 has an atomizing surface, and the heating element 22 is disposed on the atomizing surface of the porous substrate 21 for atomizing an aerosol-generating substrate to form an aerosol. The atomizing surface of the porous substrate 21 has a liquid guide groove 212, which is located on one or both sides of the heating element 22. Specifically, by providing the liquid guide groove 212 on the atomizing surface of the porous substrate 21 and locating the liquid guide groove 212 on one or both sides of the heating element 22, the liquid guide groove 212 can be used to buffer a certain amount of aerosol-generating substrate. During the atomization process, the aerosol-generating substrate in the liquid guide groove 212 can be quickly replenished to the heating element 22, thereby improving the liquid supply capacity of the porous substrate 21 and reducing the risk of local high temperature and carbon deposits on the heating element 22 due to insufficient local liquid supply. This effectively improves the problem of the atomizer core 2 being prone to scaling, which affects the service life of the atomizer core 2 and the user's taste before and after puffing. At the same time, by providing the liquid guide groove 212, the liquid surface morphology on the atomizing surface can be changed, so that the liquid film formed on the atomizing surface is concave to reduce the thickness of the liquid film, thereby reducing the risk of aerosol generating matrix explosion due to excessive liquid film thickness.

[0066] This application also conducted three sets of experiments on the atomizer core 2 provided in the embodiment corresponding to Figure 4 above. The experimental results are shown in Figure 9, which is a schematic diagram of the surface structure of multiple sets of atomizer cores after a preset number of puffs. The aerosol-generating matrix for each set of experiments was commercially available Hewu Qingxiao flavored e-liquid; the atomizer core 2 was powered at 8W, and the power supply method was: continuous power on for 3 seconds, then power off for 8 seconds; then continuous power on for 3 seconds, then power off for 8 seconds... and so on. A cycle of power on for 3 seconds, then power off for 8 seconds is also called a puff.

[0067] Among them, the total number of puffs tested in the first group of experiments (1#) was 2000; the structure of the surface of the atomizer core 2 after 1500 puffs was shown in (1a) of Figure 9; the structure of the surface of the atomizer core 2 after 2000 puffs was shown in (1b) of Figure 9. The total number of puffs tested in the second group of experiments (2#) was 2000; the structure of the surface of the atomizer core 2 after 1973 puffs was shown in (2a) of Figure 9; the structure of the surface of the atomizer core 2 after 2000 puffs was shown in (2b) of Figure 9. The total number of puffs tested in the third group of experiments (3#) was also 2000; the structure of the surface of the atomizer core 2 after 1500 puffs was shown in (3a) of Figure 9; the structure of the surface of the atomizer core 2 after 2000 puffs was shown in (3b) of Figure 9.

[0068] The above experiments show that the atomizing surface of the atomizer core 2 provided in the embodiment of the present application is almost free of scaling after 1500 and 2000 puffs, which effectively improves the scaling on the surface of the atomizer core 2.

[0069] A liquid explosion test was performed on the atomizer core 2 provided in the embodiment corresponding to FIG. 4 . This test determines the extent of the liquid explosion by measuring the volume during the puffing process. The test sample was the atomizer core 2 provided in the embodiment corresponding to FIG. 4 of the present application. The control sample was an atomizer core without the liquid guide groove 212 on the surface of the porous substrate 21. Specific test results are shown in Table 1.

[0070] Table 1 shows the volume of multiple groups of tested samples, comparison samples and test environments during the suction process

[0071] As can be seen from Table 1, compared to atomizer cores without liquid-conducting grooves in the porous substrate, the one with liquid-conducting grooves 212 in the porous substrate 21 exhibits lower decibel levels during inhalation, indicating less liquid explosion. This demonstrates that the inclusion of liquid-conducting grooves 212 in the porous substrate 21 effectively reduces the magnitude of liquid explosion and demonstrates a superior liquid-conducting effect.

[0072] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An atomizer core, comprising: A porous substrate having an atomized surface; A heating element is disposed on the atomizing surface of the porous substrate and is used to atomize the aerosol generating matrix to form an aerosol; Wherein, the atomization surface of the porous substrate has a liquid conducting groove, and the liquid conducting groove is located on one side or both sides of the heating element.

2. The atomizer core according to claim 1, wherein: The liquid guiding groove is a blind groove.

3. The atomizer core according to claim 1, wherein: The length-to-width ratio of the liquid-conducting groove is greater than 1.

5.

4. The atomizer core according to claim 2, wherein: The width of the liquid guiding groove gradually decreases in a direction away from the atomizing surface.

5. The atomizer core according to claim 4, wherein: The liquid guiding groove includes a first groove portion and a second groove portion which are interconnected along its depth direction; the first groove portion is located on a side of the second groove portion close to the atomizing surface, and the width of the first groove portion gradually decreases along a direction away from the atomizing surface; the width of the second groove portion is the same at each position, and the width of the second groove portion is the same as the minimum width of the first groove portion.

6. The atomizer core according to claim 2, wherein: The length of the liquid-conducting groove is greater than or equal to 0.3 mm and less than or equal to 1.5 mm; the width of the liquid-conducting groove is greater than or equal to 0.1 mm and less than or equal to 0.5 mm; the depth of the liquid-conducting groove is greater than or equal to 0.2 mm and less than or equal to 2 mm; and / or, The straight-line distance between the liquid-conducting groove and the heating element is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

7. The atomizer core according to claim 1, wherein: A plurality of the liquid-conducting grooves are arranged on each side of the heating element; and the plurality of the liquid-conducting grooves on the same side of the heating element are arranged at intervals along the extending direction of the heating element.

8. The atomizer core according to claim 7, wherein: The porous matrix also has a buried hole, and two adjacent liquid-conducting grooves are connected through the buried hole.

9. The atomizer core according to claim 1, wherein: The heating element is in a meandering shape and includes a plurality of arc-shaped portions and a plurality of linear portions arranged at intervals; two adjacent linear portions are connected by the arc-shaped portions; Among them, the multiple liquid-conducting grooves located on the same side of the heating element include arc-shaped grooves and straight-line grooves; the arc-shaped grooves are arranged corresponding to the arc-shaped parts, and the straight-line grooves are arranged corresponding to the straight-line parts; the arc-shaped grooves and the straight-line grooves are arranged at intervals or integrally formed along the extension direction of the heating element.

10. An atomizer, wherein: include: The atomizer core according to any one of claims 1 to 9.

11. An electronic atomization device, wherein: include: An atomizer, which is the atomizer as claimed in claim 10; The host is electrically connected to the atomizer and is used to provide power to the atomizer and control the operation of the atomizer.

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