Atomizing core, atomizer and electronic atomizing device

Abstract

The utility model discloses an atomization core, an atomizer and an electronic atomization device.The atomization core comprises a heating body, a dense ceramic layer and a micropore ceramic layer, a plurality of pores are integrally distributed in the micropore ceramic layer, the micropore ceramic layer is arranged in an enclosed mode to form a vent hole penetrating through the micropore ceramic layer, and the dense ceramic layer wraps the micropore ceramic layer in the circumferential direction of the micropore ceramic layer; the side wall of the compact ceramic layer is provided with at least one liquid inlet hole communicated with a plurality of pores of the microporous ceramic layer, the compact ceramic layer and the microporous ceramic layer are sintered into a whole, and the heating body is arranged on the hole wall of the vent hole and is sintered into a whole with the microporous ceramic layer. The atomizing core has the advantages of being good in structural stability and long in service life.

Description

Technical Field

[0001] This application relates to the technical field of electronic atomization, and particularly relates to an atomization core, an atomizer, and an electronic atomization device. Background Art

[0002] An electronic atomization device is an electronic device that can atomize aerosol-forming substances such as e-liquid and liquid medicine stored in itself into aerosol by means of electric heating. Currently, the electronic atomization devices on the market usually include an atomizer for generating aerosol and a power supply component for providing electric energy to the atomizer. Among them, the atomization core, as the core component of the atomizer, has always been the focus of research by those skilled in the art.

[0003] In the related art, the type of atomization core used in the atomizer is usually a cotton core. This type of atomization core is mainly obtained by manually wrapping a layer of liquid guide cotton around the outer periphery of the spiral heating wire. When the liquid guide cotton is wrapped around the outer periphery of the spiral heating wire, the liquid guide cotton will squeeze the spiral heating wire, making the spiral heating wire prone to deformation, resulting in poor bonding stability between the liquid guide cotton and the spiral heating wire, and thus the cotton core is prone to the problem of "collapse" damage; moreover, since the process of manually wrapping cotton is required when manufacturing an atomizer containing a cotton core, the assembly efficiency of the atomizer will be reduced. Summary of the Utility Model

[0004] The main purpose of this application is to provide an atomization core, an atomizer, and an electronic atomization device, aiming to solve the technical problems of poor structural stability of the existing cotton core and the reduction of the assembly efficiency of the atomizer.

[0005] To achieve the above object, in the first aspect, an embodiment of this application provides an atomization core, which includes:

[0006] A microporous ceramic layer, which is enclosed to form a ventilation hole passing through itself, and a plurality of pores are distributed throughout the microporous ceramic layer;

[0007] A dense ceramic layer, which is wrapped around the microporous ceramic layer along the circumferential direction of the microporous ceramic layer. At least one liquid inlet hole communicating with the pores is provided on the side wall of the dense ceramic layer, and the dense ceramic layer is sintered into one body with the microporous ceramic layer; and

[0008] A heating element, which is arranged on the pore wall of the ventilation hole and sintered into one body with the microporous ceramic layer.

[0009] In some embodiments, the porosity of the microporous ceramic layer is 30% - 70%.

[0010] In some embodiments, the pore diameter of the pores in the microporous ceramic layer is 5 - 100 μm.

[0011] In some embodiments, the wall thickness of the microporous ceramic layer is 0.5-2 mm.

[0012] In some embodiments, the wall thickness of the dense ceramic layer is 0.4-1.8 mm.

[0013] In some embodiments, the material of the microporous ceramic layer includes any one of porous silicate ceramics, porous diatomaceous earth ceramics, porous silicon nitride ceramics, porous silicon carbide ceramics, and porous silicon oxycarbon ceramics.

[0014] In some embodiments, the material of the dense ceramic layer includes any one of aluminum oxide ceramics, silicon nitride ceramics, and silicon carbide ceramics.

[0015] In some embodiments, the heating element includes any one of a spiral metal heating wire, a metal heating mesh, a metal heating sheet, and a conductive ceramic heating sheet.

[0016] In some embodiments, the thermal conductivity of the dense ceramic layer is 20 to 80 times that of the microporous ceramic layer.

[0017] In some embodiments, the thermal conductivity of the dense ceramic layer is 20 to 30 W / m·K, and the thermal conductivity of the microporous ceramic layer is 0.4 to 0.8 W / (m·K).

[0018] In some embodiments, the atomizer core further comprises a silicone sleeve, and at least one liquid through hole is formed on the side wall of the silicone sleeve. The silicone sleeve is sleeved on the outer wall of the dense ceramic layer, and the liquid through hole is correspondingly connected to the liquid inlet hole.

[0019] To achieve the above-mentioned purpose, in a second aspect, an embodiment of the present application provides an atomizer, which includes a shell, a nozzle and the atomizer core described in any of the above-mentioned embodiments, the interior of the shell is provided with an airway and a storage cavity for storing aerosol-forming substances, the nozzle is connected to one end of the shell along its own height direction and is connected to the air outlet end of the airway, the atomizer core is installed in the airway, and the air vent is connected to the airway, at least one of the liquid inlet holes is connected to the storage cavity, and an electrode assembly is provided at one end of the shell away from the nozzle, and the electrode assembly is electrically connected to the heating element.

[0020] In some embodiments, the atomizer also includes a ventilation tube having the air passage, the shell includes a base with an air inlet hole and a cup body made of a transparent material, one end of the cup body along its own height direction is fixedly connected to the suction nozzle, and the other end is fixedly connected to the base, the ventilation tube is at least partially located in the cup body, one end of the ventilation tube is connected to the suction nozzle, and the other end is connected to the air inlet hole, the storage cavity is formed between the outer wall of the ventilation tube and the inner wall of the cup body, at least one liquid outlet hole connected to the storage cavity is provided on the side wall of the ventilation tube, the atomization core is installed in one end of the ventilation tube close to the base, and the liquid inlet hole is correspondingly connected to the liquid outlet hole, and the electrode assembly is exposed and arranged on the base.

[0021] To achieve the above-mentioned purpose, in a third aspect, an embodiment of the present application also provides an electronic atomization device, which includes a power supply assembly and the atomizer described in any of the above-mentioned embodiments, wherein the power supply assembly is connected to an end of the shell away from the nozzle, and the power supply assembly is electrically connected to the electrode assembly.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] In the technical solution of the present application, the atomizer core includes a microporous ceramic layer with air vents, a dense ceramic layer wrapped around the microporous ceramic layer along the circumference of the microporous ceramic layer, and a heating element arranged on the inner wall of the microporous ceramic layer. The microporous ceramic layer is overall distributed with a plurality of pores, and a liquid inlet hole connected to the pores of the microporous ceramic layer is provided on the side wall of the dense ceramic layer. During the atomization process of the atomizer core, aerosol-forming substances such as tobacco oil can be sequentially conducted to the surface of the heating element through the liquid inlet holes of the dense ceramic layer and the plurality of pores of the microporous ceramic layer. The heating element is energized to generate heat and atomize the aerosol-forming substances transmitted to its surface into an aerosol that can be inhaled by the user. The generated aerosol is carried away by the airflow passing through the air vents for inhalation by the user.

[0024] Since the dense ceramic layer and the microporous ceramic layer, as well as the microporous ceramic layer and the heating element are tightly combined into one by sintering, the atomizer core provided in the embodiment of the present application has higher structural stability and is less prone to damage compared to the traditional cotton core structure. In particular, since the dense ceramic layer is a dense structure without pores, compared to the microporous ceramic layer with pores, the dense ceramic layer has higher hardness and structural strength. Therefore, the dense ceramic layer can act as a protective shell of the microporous ceramic layer to compensate for the hardness and structural strength of the microporous ceramic layer, so that during the storage and transportation of the atomizer core, the microporous ceramic layer and the heating element are not easily damaged by the impact of external forces. Moreover, since the atomizer core provided in the embodiment of the present application is a sintered integrated structure, compared to the traditional cotton core structure, the cumbersome cotton wrapping process can be omitted when making the atomizer, thereby improving the assembly efficiency of the atomizer. In addition, since the microporous ceramic layer has higher heat resistance than the liquid-conducting cotton in the traditional cotton core structure, the atomizer core provided in the embodiment of the present application is less likely to produce a burnt smell during operation, which is beneficial to improving the user's smoking taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the atomizer core in one embodiment of the present application;

[0027] Figure 2 This is a cross-sectional view of an atomizer core in one embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the atomizer core in another embodiment of the present application;

[0029] Figure 4 for Figure 3 Schematic diagram of structural decomposition;

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of an atomizer in one embodiment of the present application;

[0031] Figure 6 A cross-sectional view of an atomizer in one embodiment of the present application;

[0032] Figure 7 Schematic diagram of the structure of an electronic atomization device in one embodiment of the present application.

[0033] Description of Figure Numbers:

[0034] 1 - Microporous ceramic layer, 11 - Vent hole, 12 - Pore;

[0035] 2 - Dense ceramic layer, 21 - Liquid inlet hole;

[0036] 3 - Heating element, 31 - First electrode pin, 32 - Second electrode pin;

[0037] 4 - Silicone sleeve, 41 - Liquid passing hole;

[0038] 5 - Housing, 51 - Base, 511 - Air inlet hole, 52 - Cup body, 521 - Storage cavity;

[0039] 6 - Nozzle;

[0040] 7 - Electrode assembly;

[0041] 8 - Vent pipe, 81 - Air passage, 82 - Liquid outlet hole;

[0042] 9 - Power supply assembly. Detailed implementation manner

[0043] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0044] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween.

[0046] In addition, if descriptions such as "first" and "second" are involved in the embodiments of this application, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or", "and / or", or "and / or" appear throughout the text, their meanings include three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] Please refer to Figure 1-2 , an embodiment of the present application provides an atomization core, which includes a microporous ceramic layer 1, a dense ceramic layer 2, and a heating element 3, where:

[0048] The microporous ceramic layer 1 is enclosed to form a ventilation hole 11 passing through itself, and a plurality of pores 12 for conducting aerosol-forming substances are integrally distributed from the inside to the outside of the microporous ceramic layer 1; among them, in specific implementation, the material of the microporous ceramic layer 1 can be porous ceramic materials such as porous silicate ceramics, porous diatomite ceramics, porous silicon nitride ceramics, porous silicon carbide ceramics, and porous carbon oxide ceramics that can conduct aerosol-forming substances, as long as the use requirements can be met, and this embodiment does not make specific limitations on this.

[0049] The dense ceramic layer 2 is wrapped around the microporous ceramic layer 1 along the circumferential direction of the microporous ceramic layer 1. At least one liquid inlet hole 21 communicating with the plurality of pores 12 of the microporous ceramic layer 1 is provided on the side wall of the dense ceramic layer 2, and the dense ceramic layer 2 and the microporous ceramic layer 1 are sintered into one body; among them, in specific implementation, the material of the dense ceramic layer 2 can be dense ceramic materials such as alumina ceramics, silicon nitride ceramics, and silicon carbide ceramics with certain hardness and structural strength, as long as the use requirements can be met, and this embodiment does not make specific limitations on this.

[0050] The heating element 3 is arranged on the pore wall of the ventilation hole 11 (i.e., the inner wall of the microporous ceramic layer 1), and the heating element 3 and the microporous ceramic layer 1 are sintered into one body; among them, in specific implementation, the structural form of the heating element 3 can be an electrothermal structure such as a spiral metal heating wire, a metal heating mesh, a metal heating sheet, or a conductive ceramic heating sheet that can be energized to generate heat, as long as the use requirements can be met, and this embodiment does not make specific limitations on this.

[0051] In this embodiment, it should be noted that in specific implementation, in some alternative implementation manners, when manufacturing the atomization core of this embodiment, the heating element 3 can be first placed in a special mold, and then a ceramic slurry and a pore-forming agent are mixed and injected into the mold. After the ceramic slurry cools and forms, a green body structure with the heating element 3 attached to the inner wall can be obtained. Then, the green body structure is transferred to a sintering furnace for sintering. After sintering, a microporous ceramic layer 1 with the heating element 3 attached to the inner wall can be obtained. Next, the ceramic slurry can be coated on the outer peripheral wall of the microporous ceramic layer 1, and the microporous ceramic layer 1 coated with the ceramic slurry is transferred to the sintering furnace for sintering. After sintering, the atomization core of this embodiment can be obtained. In some other alternative implementation manners, a dense ceramic layer 2 can also be first sintered and formed, and then the dense ceramic layer 2 and the heating element 3 are placed together in a special mold. Then, the ceramic slurry and the pore-forming agent are mixed and injected into the mold. After the ceramic slurry cools and forms, the semi-finished product in the mold is transferred to the sintering furnace for sintering. After sintering, the atomization core of this embodiment can be obtained. Of course, the atomization core of this embodiment can also be manufactured and obtained by other mature processes in the art, and this embodiment does not make specific limitations thereto.

[0052] In this embodiment, based on the above structural design, the structural principle of the atomization core provided in this embodiment is as follows:

[0053] During the atomization process of the atomization core, the aerosol-forming substance (the aerosol-forming substance can be substances such as e-liquid, liquid medicine, etc.) can sequentially pass through the liquid inlet holes 21 of the dense ceramic layer 2 and the multiple pores 12 of the microporous ceramic layer 1 and conduct to the surface of the heating element 3. The heating element 3 is energized to generate heat and atomize the aerosol-forming substance conducted to its surface into an aerosol that can be inhaled by the user. The generated aerosol is carried away by the airflow flowing through the ventilation holes 11 for the user to inhale.

[0054] In the technical solution provided in this embodiment, since the dense ceramic layer 2 and the microporous ceramic layer 1, as well as the microporous ceramic layer 1 and the heating element 3, are tightly integrated by sintering, compared with the traditional cotton core structure, the atomization core provided in this embodiment has higher structural stability and is less likely to be damaged. Among them, since the dense ceramic layer 2 has a dense structure without pores, compared with the microporous ceramic layer 1 with pores 12, the dense ceramic layer 2 has higher hardness and structural strength. Therefore, the dense ceramic layer 2 can act as a protective shell for the microporous ceramic layer 1 to make up for the hardness and structural strength of the microporous ceramic layer 1, so that during the storage and transportation of the atomization core, the microporous ceramic layer 1 and the heating element 3 are not easily damaged by external force impacts. Moreover, since the atomization core provided in this embodiment is a sintered integral structure, compared with the traditional cotton core structure, the cumbersome cotton wrapping process can be omitted during the manufacture of the atomizer, thereby improving the assembly efficiency of the atomizer. In addition, since the microporous ceramic layer 1 has higher heat resistance than the liquid guiding cotton in the traditional cotton core structure, the atomization core provided in this embodiment is less likely to produce a burnt smell during operation, which is beneficial to improving the user's suction taste.

[0055] Further, in some alternative embodiments of the present application, the porosity of the microporous ceramic layer 1 is 30% - 70%. For example, the porosity of the microporous ceramic layer 1 can be 30%, 35%, 42%, 48%, 55%, 60%, 66%, 70%, etc. With such a setting, on the one hand, it can be avoided that the porosity of the microporous ceramic layer 1 is set too small (less than 30%) resulting in less aerosol-forming substances that the microporous ceramic layer 1 can absorb and conduct, thus resulting in less aerosol generated by the heating element 3 and affecting the user's suction taste; on the other hand, it can be avoided that the porosity of the microporous ceramic layer 1 is set too large (more than 70%) resulting in liquid leakage of the microporous ceramic layer 1. That is to say, by setting the porosity of the microporous ceramic layer 1 to 30% - 70% in this embodiment, not only can the amount of aerosol generated by the atomization core be ensured, thereby improving the user's suction taste, but also the phenomenon of liquid leakage of the atomization core can be avoided, which affects the user's experience. It should be noted here that the porosity of the microporous ceramic layer 1 refers to the percentage of the total volume of multiple pores 12 in the microporous ceramic layer 1 to the total volume of the microporous ceramic layer 1 in the natural state.

[0056] Further, in some alternative embodiments of the present application, the pore diameter of the pores 12 in the microporous ceramic layer 1 is 5 to 100 μm. For example, the pore diameter of the pores 12 in the microporous ceramic layer 1 can be 5 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc. With such a setting, on the one hand, it can avoid the pore diameter of the pores 12 in the microporous ceramic layer 1 being set too small (less than 5 μm), which may cause the aerosol-forming substance to be difficult to enter the interior of the microporous ceramic layer 1, resulting in the problem of liquid shortage and dry burning of the heating element 3 and reducing the service life of the atomization core. On the other hand, it can avoid the pore diameter of the pores 12 in the microporous ceramic layer 1 being set too large (greater than 100 μm), which increases the risk of liquid leakage in the microporous ceramic layer 1. That is to say, in this embodiment, by setting the pore diameter of the pores 12 in the microporous ceramic layer 1 to 5 to 100 μm, not only can the problem of liquid shortage and dry burning of the heating element 3 be avoided, thereby improving the service life of the atomization core, but also the risk of liquid leakage in the atomization core can be reduced.

[0057] Further, in some alternative embodiments of the present application, the wall thickness of the microporous ceramic layer 1 is 0.5 to 2 mm. As Figure 2 shown, assuming the wall thickness of the microporous ceramic layer 1 is D, then 0.5 mm ≤ D ≤ 2 mm. Among them, in specific implementation, the wall thickness of the microporous ceramic layer 1 can be 0.5 mm, 0.6 mm, 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, etc. With such a setting, on the one hand, it can avoid the wall thickness of the microporous ceramic layer 1 being set too thin (less than 0.5 mm), resulting in too low structural strength of the microporous ceramic layer 1, thereby causing cracking of the microporous ceramic layer 1 and reducing the service life of the atomization core. On the other hand, it can avoid the wall thickness of the microporous ceramic layer 1 being set too thick (greater than 2 mm), which prolongs the conduction path of the aerosol-forming substance from the liquid inlet hole 21 to the surface of the heating element 3, thereby increasing the risk of liquid shortage and dry burning of the heating element 3. That is to say, in this embodiment, by setting the wall thickness of the microporous ceramic layer 1 to 0.5 to 2 mm, not only can the risk of cracking of the microporous ceramic layer 1 be reduced, thereby improving the service life of the atomization core, but also the risk of liquid shortage and dry burning of the heating element 3 can be reduced, which is beneficial to further improving the service life and atomization taste of the atomization core.

[0058] Further, in some alternative embodiments of the present application, the wall thickness of the dense ceramic layer 2 is 0.4 to 1.8 mm. As Figure 2As shown, assuming that the wall thickness of the microporous ceramic layer 1 is d, 0.4mm≤d≤1.8mm, wherein, in specific implementation, the wall thickness of the microporous ceramic layer 1 can be 0.4mm, 0.5mm, 0.6mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.4mm, 1.8mm, etc. Such a setting can, on the one hand, avoid the wall thickness of the dense ceramic layer 2 being set too thin (less than 0.4mm) to cause the hardness and structural strength of the dense ceramic layer 2 to be too low, thereby causing the dense ceramic layer 2 to break and reduce the service life of the atomizer core, and on the other hand, avoid the wall thickness of the dense ceramic layer 2 being set too thick (greater than 1.8mm) to increase the material cost of the atomizer core. That is, by setting the wall thickness of the dense ceramic layer 2 to 0.4-1.8mm, this embodiment can not only reduce the risk of the dense ceramic layer 2 breaking, thereby increasing the service life of the atomizer core, but also help to reduce the material cost of the atomizer core.

[0059] Furthermore, in some optional embodiments of the present application, the thermal conductivity of the dense ceramic layer 2 is 20 to 80 times that of the microporous ceramic layer 1, that is, the thermal conductivity of the dense ceramic layer 2 is much better than that of the microporous ceramic layer 1. The advantage of such a setting is that when the heating element 3 is powered on and heated, the dense ceramic layer 2 can quickly absorb and disperse the heat conducted to the microporous ceramic layer 1 by the heating element 3, thereby reducing the thermal shock of the heating element 3 on the microporous ceramic layer 1, and further reducing the risk of cracking of the microporous ceramic layer 1 due to a large thermal shock. Among them, in the specific implementation, the thermal conductivity of the dense ceramic layer 2 may preferably be 20-30 W / m·K, so that the dense ceramic layer 2 can have better thermal conductivity, so as to better absorb and disperse the heat conducted from the heating element 3 to the microporous ceramic layer 1; and the thermal conductivity of the microporous ceramic layer 1 may preferably be 0.4-0.8 W / (m·K), so that the microporous ceramic layer 1 can have better thermal insulation performance, so as to reduce the heat loss of the heating element 3, so that the heat generated by the heating element 3 can be concentrated as much as possible on the surface of the microporous ceramic layer 1 in contact with the heating element 3, thereby facilitating the heating element 3 to heat the aerosol-forming substance to the atomization temperature that can be converted into an aerosol in a shorter time, that is, it is conducive to improving the "fogging" speed of the atomization core, so that the user can get a better inhalation experience.

[0060] For further information, please refer to Figure 3-4 In some optional embodiments of the present application, the atomizer core further includes a silicone sleeve 4, and at least one liquid passage hole 41 is provided on the side wall of the silicone sleeve 4. The silicone sleeve 4 is sleeved on the outer wall of the dense ceramic layer 2, and the liquid passage hole 41 is correspondingly connected to the liquid inlet hole 21. In the specific implementation, the silicone sleeve 4 can be an integrated structure or a split structure. This embodiment does not make specific restrictions on this. For example, Figure 4As shown, the silica gel sleeve 4 has a split structure, with a part of the silica gel sleeve 4 covering the upper half of the dense ceramic layer 2 and the other part of the silica gel sleeve 4 covering the lower half of the dense ceramic layer 2.

[0061] In this embodiment, by wrapping the outer wall of the dense ceramic layer 2 with a silica gel sleeve 4 having liquid passing holes 41, on the one hand, the flexible silica gel sleeve 4 can provide buffer protection for the rigid dense ceramic layer 2, thereby improving the impact resistance of the entire atomization core, so that the dense ceramic layer 2, the microporous ceramic layer 1 and the heating element 3 are less likely to be damaged by external impacts during the storage and transportation of the atomization core; on the other hand, in some application scenarios where the atomization core of this embodiment is applied to an atomizer, the sealing performance between the atomization core and the relevant structures inside the atomizer can be improved. Exemplarily, as Figure 6 shown, in some specific application scenarios, the inside of the atomizer is provided with a ventilation pipe 8 having an air passage 81 and a storage cavity 521 for storing aerosol-forming substances. A liquid outlet hole 82 communicating with the storage cavity 521 is opened on the side wall at the lower end of the ventilation pipe 8. When applying the atomization core of this embodiment to the atomizer, the atomization core can be coaxially arranged inside the lower end of the ventilation pipe 8 and the liquid passing holes 41 of the silica gel sleeve 4 are correspondingly communicated with the liquid outlet hole 82 of the ventilation pipe 8. Since the ventilation pipe 8 is generally made of a rigid material (such as a metal material or a rigid plastic), and the silica gel sleeve 4 is a flexible structural member, after the atomization core is coaxially arranged inside the lower end of the ventilation pipe 8, the outer wall of the silica gel sleeve 4 can be in close contact with the inner wall of the ventilation pipe 8 without generating an installation gap, thereby avoiding the problem that the aerosol-forming substances flowing out from the liquid outlet hole 82 leak due to the installation gap between the outer wall of the atomization core and the inner wall of the ventilation pipe 8.

[0062] Correspondingly, please refer to Figure 5-6 , the embodiment of the present application also provides an atomizer, which includes a housing 5, a mouthpiece 6 and the atomization core in any of the above embodiments (such as Figure 1-4As shown in the figure, an air passage 81 and a storage cavity 521 for storing aerosol-forming substances are provided inside the housing 5. The mouthpiece 6 is connected to one end of the housing 5 along its own height direction (illustratively, the mouthpiece is connected to the upper end of the housing), and the mouthpiece 6 communicates with the outlet end of the air passage 81. The atomization core is installed in the air passage 81, and the ventilation holes 11 of the atomization core communicate with the air passage 81. At least one liquid inlet hole 21 communicates with the storage cavity 521. An electrode assembly 7 is provided at one end of the housing 5 away from the mouthpiece 6, and the electrode assembly 7 is electrically connected to the heating element 3. Specifically, the electrode assembly 7 includes a positive electrode and a negative electrode. The heating element 3 has a first electrode pin 31 and a second electrode pin 32. The first electrode pin 31 is in electrical contact with the positive electrode of the electrode assembly 7, and the second electrode pin 32 is in electrical contact with the negative electrode of the electrode assembly 7. When the electrode assembly 7 is connected to an external power source (such as the power assembly of an electronic atomization device), the heating element 3 can be powered on and heated. Exemplarily, the structural form of the electrode assembly 7 provided in this embodiment is a threaded electrode, and the specific structural composition of the threaded electrode is well known in the art and will not be elaborated here.

[0063] In this embodiment, thanks to the improvement of the above-mentioned atomization core, the atomizer provided in this embodiment has at least the advantages of high assembly efficiency and good atomization taste.

[0064] Furthermore, please continue to refer to Figure 5-6 , in some optional embodiments of the present application, the atomizer further includes a ventilation pipe 8 having an air passage 81. The housing 5 includes a base 51 provided with an air inlet hole 511 and a cup body 52 made of a transparent material (such as glass or acrylic). One end of the cup body 52 along its own height direction is fixedly connected to the mouthpiece 6, and the other end is fixedly connected to the base 51. The ventilation pipe 8 is at least partially located inside the cup body 52 (exemplarily, the upper end of the ventilation pipe 8 is hermetically connected to the mouthpiece 6, and the lower end of the ventilation pipe 8 is hermetically connected to the lower end of the cup body 52 and the base 51 at the same time). One end of the ventilation pipe 8 (i.e., the outlet end of the air passage 81) communicates with the mouthpiece 6, and the other end of the ventilation pipe 8 (i.e., the inlet end of the air passage 81) communicates with the air inlet hole 511. The storage cavity 521 is formed between the outer wall of the ventilation pipe 8 and the inner wall of the cup body 52. At least one liquid outlet hole 82 communicating with the storage cavity 521 is provided on the side wall of the ventilation pipe 8. The atomization core is installed inside one end of the ventilation pipe 8 close to the base 51, and the liquid inlet hole 21 corresponds to and communicates with the liquid outlet hole 82. The electrode assembly 7 is exposed and provided on the base 51.

[0065] In this embodiment, based on the above structural design, the working principle of the atomizer provided in this embodiment is as follows:

[0066] The aerosol-forming substance in the storage cavity 521 is sequentially conducted to the surface of the heating element 3 in contact with the microporous ceramic layer 1 through the liquid outlet 82 of the vent 8, the liquid hole 41 of the silicone sleeve 4, the liquid inlet 21 of the dense ceramic layer 2, and the multiple pores 12 of the microporous ceramic layer 1. When the heating element 3 is connected to the external power supply through the electrode assembly 7, the heating element 3 is powered on to generate heat and heats the aerosol-forming substance to atomize, forming an aerosol that can be inhaled by the user. When the user bites the suction nozzle 6 for inhalation, an inhalation airflow is formed on the airflow flow path between the air inlet 511 and the suction nozzle 6. When the inhalation airflow flows through the vent 11, the inhalation airflow will take away the aerosol generated by the heating element 3. The aerosol finally flows out of the suction nozzle 6 to the user's mouth along with the inhalation airflow and is inhaled by the user. Among them, since the cup body 52 is made of a transparent material, it is convenient for the user to directly observe the remaining amount of the aerosol-forming substance in the storage cavity 521.

[0067] Correspondingly, please refer to Figure 7 The present application also provides an electronic atomization device, which includes a power supply assembly 9 and an atomizer in any of the above embodiments (such as Figure 5-6 As shown), the power supply assembly 9 is connected to the end of the shell 5 away from the suction nozzle 6, and the power supply assembly 9 is electrically connected to the electrode assembly 7. The power supply assembly 9 is used to provide electrical energy to the heating element 3 in the atomization core so that the heating element 3 can be powered on and generate heat.

[0068] In this embodiment, thanks to the improvement of the atomizer core, the electronic atomizer device provided in this embodiment has at least the advantage of good atomization taste.

[0069] It should be noted here that other contents of the atomizer core, atomizer and electronic atomization device disclosed in this application can be referred to the prior art and will not be repeated here.

[0070] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the utility model concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An atomizing core, characterized in that, include: The microporous ceramic layer is enclosed and arranged to form a vent hole penetrating the microporous ceramic layer, and the microporous ceramic layer has a plurality of pores distributed throughout the microporous ceramic layer; A dense ceramic layer is arranged along the circumference of the microporous ceramic layer and wraps the microporous ceramic layer, the side wall of the dense ceramic layer is provided with at least one liquid inlet hole connected to the pores, and the dense ceramic layer and the microporous ceramic layer are sintered into one body; and The heating element is arranged on the hole wall of the vent hole and is sintered into one body with the microporous ceramic layer.

2. The atomizing core according to claim 1, characterized in that, The porosity of the microporous ceramic layer is 30% to 70%; And / or, the pores of the microporous ceramic layer have a pore size of 5 to 100 μm.

3. The atomization core according to claim 1, wherein The wall thickness of the microporous ceramic layer is 0.5 to 2 mm; And / or, the wall thickness of the dense ceramic layer is 0.4-1.8 mm.

4. The atomization core according to claim 1, wherein, The material of the microporous ceramic layer includes any one of porous silicate ceramics, porous diatomaceous earth ceramics, porous silicon nitride ceramics, porous silicon carbide ceramics, and porous silicon oxycarbon ceramics; And / or, the material of the dense ceramic layer includes any one of alumina ceramics, silicon nitride ceramics, and silicon carbide ceramics; And / or, the heating element includes any one of a spiral metal heating wire, a metal heating mesh, a metal heating sheet, and a conductive ceramic heating sheet.

5. The atomization core according to any one of claims 1-4, characterized in that, The thermal conductivity of the dense ceramic layer is 20 to 80 times that of the microporous ceramic layer.

6. The atomization core according to claim 5, characterized in that, The thermal conductivity of the dense ceramic layer is 20 to 30 W / m·K, and the thermal conductivity of the microporous ceramic layer is 0.4 to 0.8 W / (m·K).

7. The atomization core according to any one of claims 1-4, characterized in that, The atomizing core further comprises a silicone sleeve, and at least one liquid passage hole is formed on the side wall of the silicone sleeve. The silicone sleeve is sleeved on the outer wall of the dense ceramic layer, and the liquid passage hole is correspondingly connected to the liquid inlet hole.

8. An atomizer, characterized in that, It comprises a shell, a nozzle and an atomizer core as described in any one of claims 1 to 7, wherein an airway and a storage cavity for storing aerosol-forming substances are arranged inside the shell, the nozzle is connected to one end of the shell along its own height direction and is communicated with the air outlet end of the airway, the atomizer core is installed in the airway, and the air vent is communicated with the airway, at least one of the liquid inlet holes is communicated with the storage cavity, and an electrode assembly is arranged at one end of the shell away from the nozzle, and the electrode assembly is electrically connected to the heating element.

9. The atomizer according to claim 8, characterized in that, The atomizer also includes a ventilation pipe with the air passage, the shell includes a base with an air inlet hole and a cup body made of a transparent material, one end of the cup body along its height direction is fixedly connected to the suction nozzle, and the other end is fixedly connected to the base, the ventilation pipe is at least partially located in the cup body, one end of the ventilation pipe is connected to the suction nozzle, and the other end is connected to the air inlet hole, the storage cavity is formed between the outer wall of the ventilation pipe and the inner wall of the cup body, at least one liquid outlet hole connected to the storage cavity is provided on the side wall of the ventilation pipe, the atomizing core is installed in one end of the ventilation pipe close to the base, and the liquid inlet hole is correspondingly connected to the liquid outlet hole, and the electrode assembly is exposed and arranged on the base.

10. An electronic atomization device, characterized in that, It comprises a power supply assembly and the atomizer as claimed in any one of claims 8 to 9, wherein the power supply assembly is connected to an end of the shell facing away from the mouthpiece, and the power supply assembly is electrically connected to the electrode assembly.

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