Hollow tube type porous carbon atomizing core and electronic atomizer

Abstract

The utility model discloses a hollow pipe type porous carbon atomization core and an electronic atomizer, and relates to the technical field of electronic atomization. The atomizing core comprises a base body part, a heating part and an electrode part, the base body part and the heating part are integrally combined and integrally formed by a porous carbon material, and the base body part and the heating part are both of a porous structure. Wherein the base body part is in the shape of a hollow tube and comprises an inner surface, an outer surface and two end faces in the axial direction; the heating part is located on one surface of the base body part, the conductivity of the heating part is higher than that of the base body part, and the heating part is formed through surface rapid heat treatment or laser irradiation; and the electrode part is electrically connected with the heating part to realize electrifying heating. The porous carbon atomization core can replace an existing cotton core and an existing ceramic core, and dry burning, core pasting and metal stripping are avoided; according to the atomizing core, oil supply can be more sufficient, atomizing efficiency is higher, and the atomizing core has wider adaptability and can be conveniently arranged in various smoking sets, such as a disposable smoking set and a bullet changing type smoking set.

Description

Technical Field

[0001] The present application relates to an atomizer core, specifically, to a hollow tubular porous carbon atomizer core and an electronic atomizer; and belongs to the technical field of electronic atomization. Background Art

[0002] The atomizer core is the heart of an electronic atomizer. By heating the liquid matrix to a certain temperature, it atomizes it into gas or tiny particles. It has found widespread application in medical, cosmetic, and e-cigarette fields. The core component of an e-cigarette, the atomizer core heats and atomizes the e-liquid, producing vaporized products, by connecting it to a power source.

[0003] There are two main types of existing atomizer core structures. The first is a resistance wire combined with an oil-conducting cotton core to form an atomizer core. The oil-conducting cotton core continuously transports tobacco oil to the surface of the resistance wire. The resistance wire is energized to heat and atomize the surrounding tobacco oil. The combination of the two materials achieves a full and natural taste of large smoke electronic cigarettes. The electronic cigarette atomizer, atomizer core and cotton core atomizer core assembly disclosed in Chinese patent document CN219781548U belong to this category. The second is to make a metal heating wire or a metal thick film on the surface of a porous ceramic as a heating element. The porous ceramic substrate is an oil-conducting and oil-storing component. The metal heating wire or the metal thick film atomizes the tobacco oil transported from the porous ceramic substrate into aerogel, thereby achieving a stable and delicate taste. For example, a porous ceramic atomizer core mentioned in Chinese patent document CN113024231A belongs to this type of atomizer core.

[0004] The first type of atomizer core structure is mainly used in atomizers with large smoke. It has a large oil storage capacity, good oil conduction performance, and a full and natural smoke taste. However, its heating element is in direct contact with the cotton, which has disadvantages such as burning the cotton and sticking the core, and easy dry burning, resulting in a short lifespan and poor atomization stability. The second type of atomizer core uses ceramic material as the oil conduction medium, which has the advantages of high temperature resistance, corrosion resistance, and high chemical stability. Its heating element does not contact the cotton, which solves the problem of burning the cotton and sticking the core. However, the metal heating wire or metal thick film laid on its surface is prone to peeling, resulting in failure of the atomization function. At the same time, both of the above-mentioned atomizer cores use metal materials as heating elements, and both have the problem of heavy metal pollution. Moreover, the metal heating elements used are not porous structures, which is not conducive to expanding the atomization area.

[0005] In order to overcome the above problems, the present invention uses porous carbon material to prepare a hollow tubular porous carbon atomizer core. The porous carbon atomizer core solves the above problems well due to its own characteristics. The porous carbon atomizer core heater and the oil absorption and oil conduction matrix are made of porous carbon material as a whole, and there is no problem of heater peeling; its heater itself is also porous carbon, with a large atomization area; its oil absorption and oil conduction matrix is ​​made of porous carbon material, and the heater contacts the porous carbon matrix, not the cotton, avoiding the problem of burning the cotton and sticking the core; its heater is made of carbon material, avoiding the problem of metal pollution. The porous carbon atomizer cores currently disclosed in patents are mostly solid square structures, and there is no design scheme for hollow tubular porous carbon atomizer cores. The hollow tubular structure of the atomizer core is more widely used than the solid structure. The solid square structure of the atomizer core can only be used for cartridge-type electronic cigarettes, and is not suitable for disposable electronic cigarettes with a larger market scale. Moreover, its oil absorption area is small, and the amount of atomized smoke is not large enough, which greatly reduces the application value of the porous carbon atomizer core. In the atomizer structure, the smoke outlet surface of a solid square-shaped atomizer core generally needs to be designed to face away from the suction port. The smoke often needs to change direction by hitting the solid surface, resulting in high suction resistance and smoke condensation, affecting the smoking experience and taste. The hollow tube-type atomizer core, on the other hand, can discharge smoke from the side, and the smoke can directly reach the smoke outlet from the internal pipe, or directly face the smoke outlet to discharge smoke, solving the problems of high suction resistance and smoke condensation. Due to its solid square structure, the solid square-shaped atomizer core has a small surface area and thus a small oil absorption area. The hollow structure of the hollow tube-type atomizer core greatly increases its surface area, and thus the oil absorption area, thereby significantly increasing the oil supply and smoke volume. Therefore, the design and development of a hollow tube-type porous carbon atomizer core is conducive to improving its performance, expanding its application areas, enhancing its commercial value, and greatly promoting the technological level and product quality of related industries. Utility Model Content

[0006] The purpose of the embodiments of the present application is to provide a hollow tubular porous carbon atomizer core and an electronic atomizer. A hollow tubular atomizer core structure (hereinafter referred to as the atomizer core) is designed based on porous carbon materials. The atomizer core is further improved in terms of materials and structure, thereby filling a gap in the field of porous carbon atomizer cores, greatly expanding its application range, and improving its commercial value.

[0007] In the first aspect, an embodiment of the present application provides a hollow tubular porous carbon atomization core, which is made of porous carbon in one piece. The hollow tubular porous carbon atomization core includes a base portion, a heating portion and an electrode portion. The heating portion is arranged on the surface of the base portion, and the heating portion is connected to the base portion. Both the heating portion and the base portion are porous structures, and the electrical conductivity of the heating portion is higher than that of the base portion.

[0008] In the above implementation process, the atomizer core of the present application adopts a hollow tubular structure, which overcomes the problem that the solid square porous carbon atomizer core is not suitable for disposable electronic cigarettes with a larger market scale. It can be widely used not only in disposable electronic cigarettes, but also in cartridge-type electronic cigarettes.

[0009] In the above implementation process, the atomizer core of the present application adopts a hollow tube structure, wherein the hollow tube includes an inner surface, an outer surface and two end surfaces along the axial direction, and the heating part is arranged on one of the surfaces, at least partially covering the surface, wherein the surface of the hollow tube where the heating element is located is the atomizing surface, and the remaining one or more surfaces are oil absorption surfaces. Its hollow structure ensures that its oil absorption area is larger than that of the solid square porous carbon atomizer core. The liquid is sucked from the oil absorption surface and conducted to the atomizing surface through the porous carbon matrix for heating and atomization. In this structure, the oil absorption surface is separated from the heating element, and the porous carbon matrix serves as the function of oil absorption and oil conduction. The heating part is in direct contact with the porous carbon matrix instead of with the cotton. The porous carbon has the advantages of high temperature resistance and stable chemical properties. As an oil absorption and oil conduction medium, it avoids the problem of burning cotton and sticking to the core caused by direct contact between the heating element and the cotton, thereby replacing the metal wire or metal mesh used in the current cotton core and becoming a more superior heating element.

[0010] In the above-mentioned implementation process, the heating part is integrated with the base part, and the heating element will not peel off during the heating and atomization process, thus avoiding the problem of peeling of the metal heating element in the porous ceramic atomization core. The heating part and the base part are both porous structures. The heating part maintains a porous structure to increase the atomization area and increase the atomization amount, thus avoiding the problem of non-porous metal heating elements in the porous ceramic atomization core, and having a larger atomization area. The base part in the atomization core of the present application has low electrical conductivity and thermal conductivity. It does not serve as a heating and atomization area, but only plays the role of absorbing liquid, guiding liquid and insulating heat. The heating part has high electrical conductivity, can concentrate current to form a heating element, and improve atomization efficiency.

[0011] In the above implementation process, the heating element adopts porous carbon material, and no metal ions are released, thus avoiding pollution and harm to health.

[0012] In the above implementation process, the porosity of the heating part and the base part is 10%-90%. Too small a porosity is not conducive to oil conduction, and too large a porosity reduces strength. The porosity setting is determined according to specific application requirements, taking into account both oil conduction and strength.

[0013] In the above implementation process, the electrodes are arranged at both ends of the heating portion along the axial direction or at symmetrical positions on both sides along the circumferential direction to adapt to different smoking device applications.

[0014] In one possible embodiment, the heating element is located on the inner surface of the hollow tube, forming the atomizing surface. The outer surface is the oil-absorbing surface, which comes into direct contact with the liquid or oil-conducting and oil-storing cotton. Liquid is drawn from the outer surface into the porous carbon matrix under capillary forces and conducted to the heating element on the inner surface and the nearby pores. Upon heating, atomization is achieved, and smoke is released from the inner surface through the gas conduit to the exhaust port. This hollow tube atomizer core structure can replace the metal mesh core currently used in disposable e-cigarettes, solving the problem of cotton burning and sticking to the core.

[0015] In one possible embodiment, the heating element is located on the outer surface of the hollow tube, forming the atomizing surface. The inner surface is the oil-absorbing surface, which comes into direct contact with the liquid or oil-conducting / storing cotton. Liquid is drawn into the porous carbon matrix from the inner surface under capillary forces and conducted to the heating element on the outer surface and the nearby pores. Upon heating, atomization is achieved, and smoke is released from the outer surface through the gas conduit to the exhaust port. This hollow tube atomizer core structure can replace the metal wire heater in traditional wound cotton cores, solving the problem of cotton burning and wick sticking.

[0016] In one possible embodiment, the heating portion is located on one of the two axial end faces of the hollow tube, which forms an atomizing surface. The other axial end face of the hollow tube, as well as the outer and inner surfaces, form oil-absorbing surfaces that are in direct contact with the liquid or oil-conducting / oil-storing cotton. Under the action of capillary force, the liquid is sucked into the porous carbon matrix from the outer surface, inner surface, and one end face and conducted to the end atomizing surface. After heating, atomization is achieved, and the smoke is released from the atomizing end face through the airflow duct to reach the air extraction port. In this type of atomizer core setting, one end face, the inner surface, and the outer surface all form oil-absorbing surfaces, including a total of three oil-absorbing surfaces. The oil-absorbing surface area is greatly increased, which is conducive to increasing the oil supply rate and thus increasing the amount of smoke. The hollow tube atomizer core of this structure can replace the metal mesh core currently used in disposable electronic cigarettes to solve the problem of burning cotton and sticking the core, and increase the oil absorption area, thereby increasing the amount of smoke.

[0017] In one possible embodiment, the heating part is of surface type. In this structure, the heating part is located on the surface of the substrate and is parallel to the surface of the substrate. It is a thin layer near the surface of the substrate, and its entire pore structure is exposed and open to the outside. In this setting, the atomized smoke is easier to discharge, which is beneficial to increase the amount of smoke and reduce the inhalation resistance.

[0018] In a possible embodiment, the heating part is embedded. In this structure, the heating part is located on the side wall of the channel embedded in the base part, and is a thin layer near the side wall of the channel. The surface of the heating part is perpendicular to the surface of the base part. In this setting, the heat diffusion is smaller and the power is more concentrated, which is conducive to improving the heating efficiency and can reach the atomization temperature at a lower power.

[0019] In the above implementation process, one or more grooves may be provided on the surface of the base portion, and the depth of the grooves is less than the thickness of the tube wall of the base portion.

[0020] In the above implementation process, the depth of the channel is 0.01-2 mm, and the width of the channel is 0.02-3 mm. Preferably, the depth of the channel is 0.1-1 mm, and the width of the channel is 0.1-1 mm.

[0021] In a second aspect, an embodiment of the present application provides an electronic atomizer, which includes the hollow tubular porous carbon atomization core provided in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the front structure of the hollow tubular porous carbon atomization core provided in Example 1 of the present application;

[0024] Figure 2 This is a schematic diagram of the front cross-sectional structure of the hollow tubular porous carbon atomization core provided in Example 2 of the present application;

[0025] Figure 3 This is a schematic structural diagram of the front view of the hollow tubular porous carbon atomization core provided in Example 3 of the present application;

[0026] Figure 4 This is a schematic structural diagram of the front cross-section of the hollow tubular porous carbon atomization core provided in Example 4 of the present application;

[0027] Figure 5 This is a schematic structural diagram of the front view of the hollow tubular porous carbon atomization core provided in Example 5 of the present application;

[0028] Figure 6 A schematic structural diagram of a side view of the hollow tubular porous carbon atomization core provided in Example 5 of the present application;

[0029] Figure 7 A schematic structural diagram of the hollow tubular porous carbon atomization core provided in Example 6 of the present application from a front cross-sectional perspective;

[0030] Figure 8 A schematic structural diagram of a side cross-sectional view of a hollow tubular porous carbon atomization core provided in Example 6 of the present application;

[0031] Figure 9This is a schematic structural diagram of the front view of the hollow tubular porous carbon atomization core provided in Example 7 of the present application;

[0032] Figure 10 A schematic structural diagram of a side view of the hollow tubular porous carbon atomization core provided in Example 7 of the present application;

[0033] Figure 11 This is a schematic structural diagram of the front cross-sectional view of the hollow tubular porous carbon atomization core provided in Example 8 of the present application;

[0034] Figure 12 A schematic structural diagram of a side cross-sectional view of a hollow tubular porous carbon atomization core provided in Example 8 of the present application;

[0035] Figure 13 This is a schematic structural diagram of the hollow tubular porous carbon atomization core provided in Example 9 of the present application;

[0036] Figure 14 Schematic diagram of the structure of some hollow tubular porous carbon atomization cores provided in Example 10 of the present application;

[0037] Icon: 100 - base portion; 110 - heating portion; 120 - electrode portion; 130 - lead; 140 - channel. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] In this application, the base part is a hollow tube, the inner surface refers to the side of the tube wall close to the axis of the base part, the outer surface refers to the side of the tube wall away from the axis of the base part, and the end face refers to the surface of the two ends of the hollow tube perpendicular to the axis.

[0044] The cross-sectional shape of the base portion is circular, square, rectangular, polygonal, elliptical, or a combination thereof. The inner and outer surfaces may have the same shape. In this case, the tubular shape includes, but is not limited to, square tubes, round tubes, elliptical tubes, and the like. The inner and outer surfaces may also have different shapes. In this case, the tubular shape includes, but is not limited to, a tubular structure with a square outer cross-section and a circular inner cross-section, or a tubular structure with a circular outer cross-section and a square inner cross-section. The tubular shape may also be a portion formed by axially cutting the aforementioned tubular structure.

[0045] The atomizer core of the present application can be prepared by the following method:

[0046] S1. Preparation of porous carbon

[0047] A carbon source precursor and a pore-forming agent are mixed, then cured, the pore-forming agent is removed by washing, and then subjected to carbonization heat treatment to obtain a porous carbon plate, or a carbon source precursor and a pore-forming agent are mixed, then cured and carbonized, during which the pore-forming agent is heated and decomposed to obtain a porous carbon plate.

[0048] S2. Processing

[0049] The porous carbon plate is processed into a hollow tube by using mechanical processing, laser processing and other methods.

[0050] The selected surface is carbonized or graphitized at a higher temperature by surface heat treatment or surface laser treatment to significantly improve its electrical conductivity to form a heat-generating portion.

[0051] Among them, surface heat treatment or surface laser treatment is used to greatly reduce the resistivity of the heating part. This process does not change the structural morphology, and still maintains the integration of the liquid absorption and liquid conduction part and the heating part, and keeps the heating part as a porous structure. Therefore, it can ensure the smooth flow of the liquid absorption and liquid conduction channels of the heating part and the base part, thereby greatly increasing the liquid conduction and atomization channels and the atomization area.

[0052] S3. Making electrodes

[0053] Electrodes are made on the surface of the heating part by using methods such as silk screen printing, pad printing, dispensing, brushing, coating, bonding, and welding.

[0054] The present application also provides an electronic atomizer, which includes the atomization core in the above embodiment.

[0055] The electronic atomizer of the present application has better atomization performance.

[0056] Example 1

[0057] See also Figure 1 The hollow tubular porous carbon atomization core includes: a base portion 100 , a heating portion 110 and an electrode portion 120 .

[0058] Among them, the base part 100 plays the role of oil conduction and oil storage, the heating part 110 is located on the outer surface of the base part 100, and the electrode part 120 is electrically connected to the heating part 110, which is convenient for connection with an external circuit to realize that the heating part 110 is powered on and heated, so that the liquid matrix transported from the base part 100 is atomized to form smoke.

[0059] The base portion 100 is a porous carbon material with a porosity of 10%-90%, optionally 55%-75%. The base portion 100 is a hollow circular tube with adjustable dimensions. For example, its dimensions may be 2.0-10.0 mm in axial length L, 2.0-8.0 mm in outer diameter D, and 0.1-3.5 mm in wall thickness. It is understood that the outer diameter D is greater than the wall thickness.

[0060] The heating portion 110 is a heating layer formed directly on the surface of the base portion 100. It can be achieved by locally heat treating the surface of the porous carbon material by using methods such as rapid surface heating and laser irradiation to increase the degree of carbonization of the surface layer or achieve graphitization, thereby obtaining a porous carbon thin layer with greatly improved electrical conductivity to form the heating portion 110. The porosity of the heating portion 110 is 10%-90%, optionally 55%-75%, and the axial length L of the heating portion 110 is 1.0-9.0 mm. It is understandable that the axial length L of the heating portion 110 can be adjusted according to the size of the base portion 100 and the resistance value requirements, and is not limited here.

[0061] The surface of the base portion 100 includes an inner surface and an outer surface relative to each other. Figure 1 The heat generating portion 110 is shown located on the outer surface.

[0062] The heating portion 110 is continuously disposed along the circumferential direction on the outer surface of the base portion 100 to form an annular surface heating portion.

[0063] There are two electrodes 120, one located at each axial end of the heating element 110. Each electrode 120 is arranged in a ring shape along the outer circumference of the base 100. The electrode 120 can be manufactured on the ends of the heating element 110 by methods such as silk screen printing, pad printing, dispensing, coating, brushing, and welding. The size of the electrode 120 is adjusted according to the size of the base 100 and the heating element 110.

[0064] The hollow tubular porous carbon atomization core further includes two leads 130 , which can be connected and fixed to the corresponding electrode parts 120 by welding, riveting, conductive paste bonding, elastic clamping or pressure clamping to achieve electrical connection.

[0065] In the embodiment, the inner surface is the oil absorption surface, the outer surface is the atomization surface, the inner surface contacts the liquid or oil-conducting cotton, and the liquid is transferred to the outer surface through the porous carbon matrix to achieve atomization.

[0066] Example 2

[0067] like Figure 2 As shown, this figure is a front view of the axial center cross-sectional structure of the hollow tubular porous carbon atomization core of this embodiment; the difference between the hollow tubular porous carbon atomization core provided in this embodiment and that of Example 1 is only that the heating part 110 is located on the inner surface of the hollow tube, and the electrode part 120 and the lead 130 are also located on the inner surface of the hollow tube.

[0068] In the embodiment, the outer surface is the oil absorption surface, the inner surface is the atomization surface, the outer surface contacts the liquid or oil-conducting cotton, and the liquid is transferred to the inner surface through the porous carbon matrix to achieve atomization.

[0069] Example 3

[0070] This embodiment provides a hollow tubular porous carbon atomization core with an embedded heating portion.

[0071] See also Figure 3 A plurality of grooves 140 are provided on the outer surface of the base portion 100. The heating portion 110 is a heating layer formed on the side wall of the groove 140. There are two electrode portions 120, which are respectively located at the two axial ends of the heating portion 110. The electrode portions 120 are arranged in a ring shape along the outer periphery of the base portion 100. The electrode portions 120 cover the heating portion groove 140 and are electrically connected thereto.

[0072] The channel 140 can be formed by mechanical processing, and then the surface heating treatment or surface laser irradiation method is used to increase the carbonization degree of the side wall or realize surface graphitization, so that the surface layer conductivity is greatly improved to form a heating element. In this process, the pore structure of the porous carbon remains unchanged, and a heating element with a porous structure is obtained. Alternatively, the channel 140 is formed by laser processing. In this process, the side wall of the channel 140 realizes the carbonization degree of its surface layer increased or graphitized due to the heating effect of the laser, so that its conductivity is greatly improved, forming a thin layer of heating element located on the side wall of the channel 140. In this process, the pore structure of the porous carbon remains unchanged, and a heating portion 110 with a porous structure is obtained, which is perpendicular to the surface of the base portion 100. The porosity of the heating portion 110 is 10%-90%, and can be optionally 55%-75%.

[0073] The depth of the channel 140 is less than the wall thickness of the base 100, that is, the channel 140 does not penetrate the wall of the base 100. The depth of the channel 140 is, for example, 0.01-2 mm, optionally 0.1-1.0 mm. The width of the channel 140 is, for example, 0.02-3.0 mm, optionally 0.1-1.0 mm.

[0074] The channel 140 can be arranged along the circumference of the base portion 100 to form a ring shape, or can be arranged along the axial direction of the base portion 100, or can be arranged in other required patterns. It can be designed according to actual needs, and the electrode structure is adjusted accordingly.

[0075] In this embodiment, each channel 140 is provided along the axial direction of the base portion 100 , and a plurality of channels 140 are arranged at intervals along the circumferential direction of the base portion 100 .

[0076] In this embodiment, the embedded heating element is beneficial to reducing heat diffusion, improving heat utilization, and achieving heating atomization at lower power.

[0077] Example 4

[0078] like Figure 4As shown, this figure is a front view of the axial center cross-sectional structure of the hollow tubular porous carbon atomization core of this embodiment. The difference between the hollow tubular porous carbon atomization core provided in this embodiment and that of Example 3 is only that:

[0079] The heating portion 110 is located on the inner surface of the hollow tube, and the electrode portion 120 and the lead wire 130 are also located on the inner surface of the hollow tube.

[0080] Example 5

[0081] The hollow tube-type porous carbon atomization core provided in this embodiment differs from that in embodiment 1 only in that the two electrodes are located on both sides of the hollow tube in the circumferential direction, rather than at both ends in the axial direction.

[0082] like Figure 5 as well as Figure 6 The electrode portion 120 is located at a symmetrical position on both sides of the outer surface of the base portion. The electrode portion 120 extends in the axial direction and is continuously distributed between the two axial ends of the base portion. The lead 130 is connected to the electrode portion 120.

[0083] The heat generating portion 110 is a heat generating layer directly formed on the outer surface of the base portion 100 , and the heat generating portion 110 covers all outer surfaces of the base portion 100 except the region where the electrode portion 120 is located.

[0084] Example 6

[0085] The hollow tubular porous carbon atomization core provided in this embodiment is different from that in embodiment 5 only in that the heating portion and the electrode portion are arranged on the inner surface of the substrate, rather than the outer surface.

[0086] like Figure 7 and Figure 8 As shown, the electrode portion 120 is located at two symmetrical positions on the inner surface of the base portion, extends in the axial direction, and is continuously distributed between the two axial ends of the base portion. The lead wire 130 is connected to the electrode portion 120.

[0087] The heat generating portion 110 is a heat generating layer directly formed on the inner surface of the base portion 100 , and the heat generating portion 110 covers all inner surfaces of the base portion 100 except the region where the electrode portion 120 is located.

[0088] Example 7

[0089] The hollow tubular porous carbon atomization core provided in this embodiment is different from that in embodiment 5 only in that the heating portion and the electrode portion only cover a partial area of ​​the outer surface of the substrate, rather than the entire surface.

[0090] like Figure 9 and 10As shown, the electrode portion 120 is located at a symmetrical position on both sides of the outer surface of the base portion and extends axially, but only extends from one end to a position between the two ends, such as the middle position. The lead 130 is connected to the electrode portion 120 and leads out from the end where the heating portion is located.

[0091] The heating element 110 is a heating layer formed directly on the outer surface of the base 100. It is located between the two electrode portions 120, extending from one end surface to a position midway between the two end surfaces. This arrangement is intended to accommodate the length requirements of the hollow tube of the atomizer core in different smoking device structures, while also meeting the requirements for both resistance and atomization area.

[0092] Example 8

[0093] The hollow tube type porous carbon atomization core provided in this embodiment is different from that in embodiment 7 only in that the heating portion and the electrode portion are arranged on the inner surface of the hollow tube substrate instead of the outer surface.

[0094] like Figure 11 and 12 As shown, the electrode portion 120 is located at a symmetrical position on both sides of the inner surface of the base portion and extends axially, but only extends from one end to a position between the two ends, such as the middle position. The lead 130 is connected to the electrode portion 120 and leads out from the end where the heating portion is located.

[0095] The heating element 110 is a heating layer formed directly on the inner surface of the base 100. It is located between the two electrode portions 120, extending from one end surface to a point midway between the two end surfaces. This arrangement is intended to accommodate the length requirements of the hollow tube of the atomizer core for different smoking device structures, while also meeting the requirements for both resistance and atomization area.

[0096] Example 9

[0097] The main difference between the hollow tube type porous carbon atomization core provided in this embodiment and embodiments 1-8 is that the heating portion and the electrode portion are located on one end surface of the hollow tube base portion, rather than on the inner surface or outer surface.

[0098] like Figure 13 As shown, the base portion 100 has two opposite end surfaces along the axial direction, wherein the heat generating portion 110 is a heat generating layer formed on one of the end surfaces.

[0099] The electrode portion 120 is disposed at a symmetrical position along the circumferential direction of the end surface of the base portion where the heating portion is located. The lead wire 130 is connected to the electrode portion 120 and is led out from the other end opposite to the end where the heating portion is located.

[0100] The heating portion 110 is located between the two electrodes and covers part or all of the end surface between the two electrodes. Figure 13To cover the entire surface between the two electrodes.

[0101] The purpose of this setting is to adapt to the different requirements of different smoking device structures and to help reduce the resistance to suction.

[0102] Implementation Example 10

[0103] The hollow tubular porous carbon atomization core provided in this embodiment differs from that in embodiment 9 only in that electrodes are provided on both axial end faces of the base portion and are connected and conducted via metal wires or metal films.

[0104] like Figure 14 As shown, the base portion 100 has two opposite end surfaces along the axial direction, wherein the heat generating portion 110 is a heat generating layer formed on one of the end surfaces.

[0105] Electrode portions 120 are provided on both axial end faces of the base portion 100. The electrode portions 120 on each end face are arranged at symmetrical positions along the circumferential direction, and the electrode portions on the two end faces are in symmetrical positions with each other. The electrodes on the two end faces on the same side are electrically connected through metal wires or metal films.

[0106] The heating portion 110 is located between the two electrode portions 120 on one end surface, covering part or all of the end surface between the two electrodes. Figure 14 To cover the entire surface between the two electrodes.

[0107] Compared with Example 9, the purpose of this arrangement is to adopt a pin-type electrical connection, which is conducive to simplifying assembly and automated production.

[0108] Example 11

[0109] An electronic atomizer includes a shell and a hollow tubular porous carbon atomization core provided in the shell as provided in any one of Examples 1-10. Specifically, the electronic atomizer can be used in electronic cigarettes and has a better atomization effect.

[0110] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A hollow tubular porous carbon atomizing core, characterized in that: The hollow tubular porous carbon atomization core is made of a porous carbon material and is integrally formed. The hollow tubular porous carbon atomization core includes a base portion, a heating portion, and an electrode portion. The heating portion is provided on the surface of the base portion and is electrically connected to the electrode portion. The base portion and the heating portion have a porous structure, and the heating portion has a higher electrical conductivity than the base portion. The base portion is in a hollow tubular shape, and the electrode portion may or may not have a lead wire.

2. The hollow tubular porous carbon atomizing core according to claim 1, characterized in that: The surface of the base portion includes an inner surface and an outer surface facing each other, and two end surfaces facing each other in the axial direction. The heat generating portion is located on one of the outer surface, the inner surface, and the two end surfaces.

3. The hollow tubular porous carbon atomizing core according to claim 2, characterized in that: The cross-sectional shape of the inner surface is the same as or different from the cross-sectional shape of the outer surface.

4. The hollow tubular porous carbon atomizing core according to claim 1, characterized in that: The cross-sectional shape of the base portion is circular, square, rectangular, polygonal, elliptical or a combination thereof.

5. The hollow tubular porous carbon atomizing core according to any one of claims 1 to 4, characterized in that: The heating part is a surface heating part or an embedded heating part.

6. The hollow tubular porous carbon atomizing core according to claim 5, characterized in that: The surface-type heating portion is a heating layer directly formed on the surface of the base portion, and the surface of the heating portion is parallel to the surface of the base portion where it is located.

7. The hollow tubular porous carbon atomizing core according to claim 5, characterized in that: The embedded heating portion is formed in a trench on the surface of the substrate. The embedded heating portion is a thin layer near the sidewall surface of the trench. The surface of the embedded heating portion is perpendicular to the surface of the substrate where it is located.

8. The hollow tubular porous carbon atomizing core according to claim 7, characterized in that: The number of the channel of the embedded heating part may be one or more, and the depth of the channel is less than the thickness of the tube wall of the base part.

9. The hollow tubular porous carbon atomizing core according to claim 7, characterized in that: The depth of the channel is 0.01-2 mm, and the width of the channel is 0.02-3 mm.

10. The hollow tubular porous carbon atomizing core according to claim 1, characterized in that: The porosity of the heating portion and the base portion is 10%-90%.

11. An electronic atomizer, characterized in that: The invention comprises the hollow tubular porous carbon atomization core according to any one of claims 1 to 10.

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