Atomizing core, atomizer and electronic atomizing device

Abstract

The invention provides an atomizing core, an atomizer and an electronic atomizing device. The atomizing core comprises a porous base body and a heating element. The porous substrate is provided with an atomization surface; the heating element is arranged on the atomizing surface of the porous substrate and is used for atomizing the aerosol generating substrate to form aerosol; the atomization face of the porous base body is provided with a liquid guide groove, and the liquid guide groove is located on one side or two sides of the heating element. According to the atomizing core, a certain amount of aerosol generating matrix can be stored in the liquid guide groove, so that in the atomizing process, the aerosol generating matrix in the liquid guide groove can be rapidly supplemented to the heating element, the liquid supply capacity of the porous matrix is improved, the risks of local high temperature and carbon deposition caused by insufficient local liquid supply of the heating element are reduced, and the atomizing effect is improved. Therefore, the situation that the service life of the atomizing core and the taste of a user before and after smoking are affected due to the fact that the atomizing core is prone to scaling is effectively improved. Meanwhile, the risk of liquid explosion can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic atomization, and in particular to an atomization core, an atomizer and an electronic atomization device. Background Art

[0002] At present, the atomizer includes an atomizer core, which is used to atomize the aerosol generating matrix to form an aerosol. However, 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. Summary of the invention

[0003] The atomizer core, atomizer and electronic atomization device provided in the present 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.

[0004] In order to solve the above technical problems, a technical solution adopted in the present 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.

[0005] In one embodiment of the present application, the liquid guiding groove is a blind groove.

[0006] In one embodiment of the present application, the length-to-width ratio of the liquid-conducting groove is greater than 1.5.

[0007] In one embodiment of the present application, the width of the liquid guiding groove gradually decreases in a direction away from the atomizing surface.

[0008] In one embodiment of the present application, 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 in 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.

[0009] In one embodiment of the present application, 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.

[0010] In one embodiment of the present application, a plurality of the liquid-conducting grooves are disposed 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.

[0011] 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.

[0012] In one embodiment of the present application, 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;

[0013] 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.

[0014] 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 involved above.

[0015] In order to solve the above technical problems, another technical solution adopted in the present 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 electrical energy to the atomizer and controlling the operation of the atomizer.

[0016] 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 atomization surface, and the heating element is arranged on the atomization surface of the porous substrate, which is used to atomize the aerosol generating matrix to form an aerosol; and the atomization 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 atomization 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, reducing the risk of local high temperature and carbon deposition of the heating element due to insufficient local liquid supply, thereby effectively improving the atomizer core from scaling easily, 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 the liquid guide groove, the liquid surface morphology on the atomization surface can be changed, so that the liquid film formed on the atomization surface is concave to reduce the thickness of the liquid film, thereby reducing the risk of aerosol generating matrix explosive liquid due to excessive liquid film thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A schematic diagram of the structure of an electronic atomization device provided in one embodiment of the present application;

[0018] Figure 2 is a simplified structural diagram of an atomizer provided in one embodiment of the present application;

[0019] Figure 3 A schematic diagram of the overall structure of the atomizer core provided in one embodiment of the present application;

[0020] Figure 4 A top view of an atomizer core provided in one embodiment of the present application;

[0021] Figure 5 An embodiment of the present application provides Figure 2 The AA sectional view of the atomizer core M is shown;

[0022] Figure 6 A top view of an atomizer core provided in another embodiment of the present application;

[0023] Figure 7 A top view of an atomizer core provided in yet another embodiment of the present application;

[0024] Figure 8 Another embodiment of the present application provides Figure 2 The AA sectional view of the atomizer core M is shown;

[0025] Fig. 9 This is a schematic diagram of the surface structure of multiple groups of atomizer cores after a preset number of puffs.

[0026] Description of Reference Numerals

[0027] 100-Electronic atomization device;

[0028] 10-atomizer; 1-shell; 11-air flow channel; 12-liquid storage tank; 2-atomizing core; 21-porous matrix; 211-lower liquid tank; 212-liquid guide tank; 212a-arc-shaped tank; 212b-straight tank; 213-first tank portion; 214-second tank portion; 215-buried hole; 22-heating element; 22a-first straight portion; 22b-second straight portion; 22c-third straight portion; 22d-first arc-shaped portion; 22e-second arc-shaped portion; 3-thimble; 20-host. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] The atomization core usually includes a porous matrix and a heating element arranged 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 storing an aerosol generating matrix, and the aerosol generating matrix is ​​drained from the liquid absorption surface to the atomization surface through the capillary force of the porous matrix. The heating element is arranged on the atomization surface and is used to atomize the aerosol generating matrix to form an aerosol when power is turned on. Among them, the porous matrix can be a high temperature resistant material, such as porous ceramics, porous glass, etc. The heating element is usually a metal heating film or a metal mesh, a metal wire, etc.

[0033] However, the inventor of this application has found through long-term research that the existing atomizer core is prone to scaling, which will affect the service life of the atomizer core; and due to the influence of dirt, the taste of the user before and after the inhalation is inconsistent, affecting the user experience. In addition, due to the surface tension of the liquid, the heating element protrudes from the atomization surface of the porous matrix; the porous matrix guides the aerosol generating matrix to the atomization surface of the porous matrix through the capillary effect, and the aerosol generating matrix will form a layer of liquid film on the atomization surface of the porous matrix; if the thickness of the liquid film is too thick, the problem of liquid explosion is easy to occur during the atomization process.

[0034] To this end, the present application provides an atomization core, which reduces the risk of scaling and explosion of the atomization core by providing a liquid guide groove on the atomization surface of a porous substrate and positioning the liquid guide groove on one side or both sides of a heating element.

[0035] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0036] See also Figure 1 , Figure 1 This 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 can be used for atomization of an aerosol-generating matrix. The electronic atomization device 100 includes an atomizer 10 and a host 20 electrically connected to each other.

[0037] Among them, the atomizer 10 is used to store the aerosol generating matrix and atomize the aerosol generating matrix to form an aerosol that can be inhaled by the user. The atomizer 10 can be specifically used in different fields, such as medical treatment, beauty, leisure inhalation, 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 inhalation as an example. The specific structure and function of the atomizer 10 can refer 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.

[0038] The host 20 includes a battery (not shown) and a controller (not shown). The battery is used to provide electrical energy for the operation of the atomizer 10, so that the atomizer 10 can atomize the aerosol generating matrix to form an aerosol; the controller is used to control the operation of the atomizer 10. The host 20 also includes other components such as a battery holder and an airflow sensor. The atomizer 10 and the host 20 can be integrally arranged or detachably connected, and can be designed according to specific needs.

[0039] See also Figure 2 , Figure 2 It is a 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 an ejector pin 3. The housing 1 includes a nozzle, 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 nozzle. 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 nozzle through the air flow channel 11 for the user to inhale. The mounting seat is arranged in the housing 1, and the ejector pin 3 is arranged on the mounting seat and abuts against the atomizer core 2, and is used to be electrically connected to a power source to supply power to the atomizer core 2. The power source can be a battery or a battery assembly.

[0040] The specific structure and function of the atomizer core 2 can refer to the relevant description of the atomizer core 2 provided in the following embodiment. The other structures of the atomizer 10 are similar to the relevant structures of the existing atomizers, and the details can refer to the existing technology.

[0041] See also Figures 3 to 5 , Figure 3 A schematic diagram of the overall structure of the atomizer core provided in one embodiment of the present application; Figure 4 A top view of an atomizer core provided in one embodiment of the present application; Figure 5 An embodiment of the present application provides Figure 2 The AA cross-sectional view of the atomizer core M is shown. In this embodiment, an atomizer core 2 is provided. The atomizer core 2 includes a porous matrix 21 and a heating element 22 .

[0042] The porous matrix 21 has a plurality of microporous structures, and the microporous structures 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, which improves the liquid supply effect to the heating element 22; and the pore structure of the porous matrix 21 can absorb certain dirt (such as soot) in its pore structure, reducing the influence of soot on the heating element 22.

[0043] like Figure 5 As shown, the porous substrate 21 has a liquid absorption surface and an atomization surface disposed opposite to each other along its thickness direction Z, and the liquid absorption surface has a lower liquid groove 211, which is connected to the liquid storage tank, and the aerosol generating matrix in the liquid storage tank 12 is directed to the lower liquid groove 211, and the aerosol generating matrix in the lower liquid groove 211 is directed to the atomization surface of the porous substrate 21 through the capillary force of the porous substrate 21. Among them, the lower liquid groove 211 extends along the thickness direction Z, and can be a blind groove, that is, 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 cuboid, a cube, a cylinder, an irregular polygon, etc. 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 deeper to improve the efficiency of the aerosol generating matrix flowing to the atomization surface.

[0044] The porous matrix 21 can 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 other porous structures, for example, a dense matrix is ​​provided with a plurality of 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 cuboid or a cube; or other irregular three-dimensional structures.

[0045] Combination Figure 3 or Figure 4 The heating element 22 is disposed on the atomizing surface of the porous substrate 21 and is used to atomize the aerosol-generating matrix flowing to the atomizing surface through the lower liquid tank 211 to form an aerosol.

[0046] The heating element 22 may be a filamentary structure or a strip-shaped structure, and the heating element 22 extends in a curve to increase the contact area between the heating element 22 and the porous substrate 21 within the effective atomization surface area. Specifically, the heating element 22 is printed on the atomization surface of the porous substrate 21 by silk screen printing and 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.

[0047] like Figure 4 As shown, 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 arranged at intervals along the width direction Y of the porous matrix 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 matrix 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.

[0048] For specific embodiments, please refer to Figure 3 and Figure 4 The atomizing surface of the porous matrix 21 has a liquid guide groove 212, and the liquid guide groove 212 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, reducing the risk of local high temperature and carbon deposition due to insufficient local liquid supply of the heating element 22, and effectively improving the situation where the atomizing core 2 is easy to scale, 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, so as to reduce the thickness of the liquid film, thereby reducing the risk of the aerosol generating matrix exploding due to excessive thickness of the liquid film.

[0049] Specifically, the number of the liquid-conducting grooves 212 may be multiple. Figure 5The liquid guide groove 212 may be a blind groove, that is, the liquid guide groove 212 does not penetrate the porous substrate 21 along the thickness direction Z of the porous substrate 21, and is not directly connected to the lower liquid groove 211. The blind groove can buffer a certain amount of aerosol generating matrix and has extremely low resistance. During the atomization process, liquid can be quickly supplied to the vicinity of the heating element 22, thereby improving the liquid supply capacity.

[0050] Wherein, the aspect ratio of each liquid-conducting groove 212 is greater than 1.5. In a specific embodiment, Figure 3 and Figure 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 for 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 thickness of the liquid film 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 use of 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 atomization 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 liquid explosion, the liquid supply in the local area of ​​the atomization surface is more uniform, avoiding the phenomenon of local liquid shortage and dry burning, and further slowing down and reducing the formation of scale.

[0051] 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 the 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.

[0052] In one embodiment, see Figure 5 , the width W of the liquid guide groove 212 gradually decreases in the direction away from the atomizing surface. In this way, it is not only easy to prepare and shape; but also according to the capillary principle: Among them, h is the height of the liquid rising and falling; 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, gas and tube wall material. For water and clean glass, θ=0°, and mercury and glass θ=140° are contact angles; ρ is the liquid density; g is the acceleration of gravity; r is the radius of the capillary. It can be seen that the smaller r is, the better the capillary effect. Therefore, the bottom of the liquid guide groove 212 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 larger width part of the liquid guide groove 212 close to the atomization surface, thereby improving the liquid supply capacity; at the same time, the smaller width part of the liquid guide groove 212 also has a certain liquid locking ability.

[0053] 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 .

[0054] 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 or rectangular, etc.

[0055] In a specific embodiment, please refer to Figure 4 , a plurality of liquid-conducting grooves 212 are disposed 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 arranged at intervals along the extending direction of the heating element 22. Of course, in other embodiments, see Figure 6 , Figure 6 A top view of an atomizer core provided in another embodiment of the present application; the liquid guide groove 212 may also be provided only on 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 multiple liquid guide grooves 212 located on the side are arranged at intervals along the extension direction of the heating element 22.

[0056] Among them, you can continue to refer 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 rapid supply of liquid from the liquid-conducting groove 212 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 atomization surface, the surrounding area of ​​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.

[0057] When the heating element 22 is distributed in a meandering shape, the plurality of liquid-conducting grooves 212 located on the same side of the heating element 22 include an arcuate groove 212a and a linear groove 212b; wherein the arcuate groove 212a is arranged corresponding to the arcuate portion, and the linear groove 212b is arranged corresponding to the linear portion; the arcuate groove 212a and the linear groove 212b are arranged at intervals along the extension direction of the heating element 22. Of course, see Figure 7 , Figure 7 A top view of an atomizer core provided in another embodiment of the present application; the arcuate groove 212a and the linear groove 212b may also be integrally formed along the extension direction of the heating element 22; in this case, it may also be understood that a liquid guide groove 212 includes an arcuate segment and a linear segment.

[0058] In a specific embodiment, since there may be temperature differences at various positions of the porous substrate 21, the atomization rates at various positions of the atomization surface of the porous substrate 21 are not the same, that is, the atomization rate of some areas is faster, the consumption of the aerosol generating substrate is faster, and the atomization rate of some areas is relatively slow. Therefore, it is necessary to supply liquid to the area with a faster atomization rate in time to avoid dry burning or liquid explosion.

[0059] Therefore, in one embodiment, see Figure 8 , Figure 8 Another embodiment of the present application provides Figure 2 AA sectional view of the atomizing core M shown. The porous matrix 21 has a buried hole 215, 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.

[0060] The length and width of the buried hole 215 are substantially consistent with the length and width of the liquid guiding groove 212 .

[0061] The atomizing 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 arranged on the atomizing surface of the porous substrate 21, and is used to atomize the aerosol generating matrix to form an aerosol; and the atomizing surface of the porous substrate 21 has a liquid guide groove 212, and the liquid guide groove 212 is located on one side or both sides of the heating element 22. Among them, by arranging the liquid guide groove 212 on the atomizing surface of the porous substrate 21, and making the liquid guide groove 212 located on one side or both sides of the heating element 22; in this way, a certain amount of aerosol generating matrix can be buffered by the liquid guide groove 212, so that during the atomization process, the aerosol generating matrix in the liquid guide groove 212 can be quickly supplemented to the heating element 22, thereby improving the liquid supply capacity of the porous substrate 21, reducing the risk of local high temperature and carbon deposition of the heating element 22 due to insufficient local liquid supply, thereby effectively improving the atomizing core 2 from being easy to scale, 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 atomization surface can be changed, so that the liquid film formed on the atomization surface is concave to reduce the thickness of the liquid film, thereby reducing the risk of aerosol generating matrix explosive liquid due to excessive thickness of the liquid film.

[0062] This application also applies to the above Figure 4 Three groups of experiments were carried out on the atomizer core 2 provided in the corresponding embodiment. The experimental results are shown in Fig. 9 , Fig. 9 The schematic diagram of the surface structure of multiple groups of atomizer cores after a preset number of puffs. The aerosol generation matrix of each group of experiments uses the commercially available Crane Dance Qingxiao flavored e-liquid; the power supply of atomizer core 2 is 8W, and the power supply method is: continuously powered on for 3 seconds, then powered off for 8 seconds; then continuously powered on for 3 seconds, then powered off for 8 seconds... and so on. Among them, a cycle of powering on for 3 seconds and then powering off for 8 seconds is also called a puff.

[0063] The total number of puffs in the first group of experiments (1#) was 2000. After 1500 puffs, the structure of the surface of the atomizer core 2 was as follows: Fig. 9 As shown in (1a) in FIG. 2 ; after 2000 puffs, the structure of the surface of the atomizer core 2 is as follows Fig. 9 The second group of experiments (2#) had a total of 2000 puffs. After 1973 puffs, the surface structure of the atomizer core 2 was as follows: Fig. 9 As shown in (2a) in FIG. 2 ; after 2000 puffs, the structure of the surface of the atomizer core 2 is as follows Fig. 9 The third group of experiments (3#) also had a total of 2000 puffs. After 1500 puffs, the structure of the surface of the atomizer core 2 was as follows: Fig. 9As shown in (3a); after 2000 puffs, the structure of the surface of the atomizer core 2 is as follows Fig. 9 As shown in (3b) in .

[0064] Through the above experiments, it can be seen that the atomization surface of the atomizer core 2 provided in the embodiment of the present application is almost not scaled after 1500 and 2000 puffs, which effectively improves the scaling on the surface of the atomizer core 2.

[0065] For the above Figure 4 The atomizer core 2 provided in the corresponding embodiment is subjected to a liquid explosion test; the test is used to determine the extent of liquid explosion by testing the volume value during the suction process; wherein the sample to be tested is the above-mentioned Figure 4 The atomizer core 2 provided in the corresponding embodiment; the comparative sample is an atomizer core corresponding to the porous substrate 21 having no liquid guide groove 212 on the surface; the specific test results are shown in Table 1.

[0066] Table 1 shows the volume of multiple groups of samples to be tested, comparison samples and test environment during the suction process

[0067]

[0068] It can be seen from Table 1 that, compared with the atomizer core without the liquid guide groove on the porous substrate, the atomizer core with the liquid guide groove 212 on the porous substrate 21 has a lower decibel value during the suction process, that is, the liquid explosion degree is smaller. It can be seen that the liquid guide groove 212 on the porous substrate 21 can effectively reduce the amplitude of the liquid explosion, and the liquid guide groove 212 has a better effect in suppressing the liquid explosion.

[0069] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An atomizer core, characterized in that: include: 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, characterized in that: The liquid guiding groove is a blind groove.

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

5.

4. The atomizer core according to claim 2, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: include: The atomizer core according to any one of claims 1 to 9.

11. An electronic atomization device, characterized in that: 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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