Heating assembly, electronic atomizer, and manufacturing method of heating assembly

Abstract

The present application relates to a heating assembly, an electronic atomizer and a manufacturing method of the heating assembly, the heating assembly comprising a heating cup with a heating cavity and a heating body connected to the heating cup, the heating body comprising a connecting part and two electrode parts, the connecting part being arranged around the side wall of the heating cavity, the opposite ends of the connecting part being connected to one electrode part respectively, the outer surface of the electrode part being covered with a metal layer for connecting to a metal electrode, and the material of the heating body being carbon fiber or graphite. In the preparation, first, a heating body semi-finished product is prepared to have a strip structure with a certain length, then the part to be connected to the electrode is subjected to a metallization treatment, and finally the heating body is connected to the inner wall of the heating cup to obtain the heating assembly. The present application not only increases the conductivity of the heating body, but also solves the problem of how to make the heating body have the characteristics of high temperature resistance and oxidation resistance, and how to connect to the metal electrode, further improving the taste of the user when using the electronic atomizer for smoking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic atomizer, in particular to a heating assembly, an electronic atomizer and a manufacturing method of the heating assembly. BACKGROUND

[0002] The electronic atomizer, also known as virtual cigarette or electronic cigarette, has the same appearance as a cigarette and similar taste to a cigarette. It is a non-burning cigarette substitute product. It is similar to some characteristics of a common cigarette, can refresh, satisfy the pleasure of a smoker and the use habit formed for many years. With the gradually recognized hazards of traditional cigarettes, the electronic atomizer has been increasingly accepted by the smoking consumer group and gradually expanded the market share.

[0003] The essence of the electronic atomizer is an aerosol generating device. The battery is connected with the atomizing core. The battery provides electric energy to heat the heating assembly in the atomizing core, atomizes the tobacco oil in the oil tank, and generates aerosol for the user to inhale. Therefore, the heating assembly is the core component of the electronic atomizer, and the heating body in the heating assembly is the key component of the electric heating conversion. At present, most of the heating bodies of the electronic atomizer are made of metal such as iron, chromium, aluminum, stainless steel, etc. Since the above materials often contain iron elements, oxidation easily occurs during heating. After the heating body is oxidized, the surface is easy to accumulate carbon, thereby forming a rough surface, which easily causes uneven heating and affects the taste. Some other materials, such as carbon materials, have better oxidation resistance and better heating effect. In addition to normal heat convection conduction, it also has infrared radiation function, so it can radiate infrared waves to the surrounding space to heat. If carbon material is used as heating body, although the overall heating uniformity will be better than metal, since carbon material is difficult to melt at high temperature, it is difficult to weld carbon material, which leads to the connection of carbon material and metal electrode being a difficulty. Therefore, in practical application, it is still difficult to use carbon material as a heating body. SUMMARY

[0004] Therefore, it is necessary to provide a heating assembly, an electronic atomizer comprising the heating assembly and a manufacturing method of the heating assembly, in view of the problem that the heating body material in the existing electronic atomizer is easy to oxidize, or other materials with good oxidation resistance are difficult to weld at high temperature and are difficult to be used as a heating body.

[0005] According to an aspect of the present application, a heating assembly is provided, comprising:

[0006] The heating cup is provided with a heating cavity penetrating through the opposite ends in the axial direction thereof;

[0007] A heating body is connected to the heating cup, and the heating body comprises a connecting portion and two electrode portions. The connecting portion is arranged around the side wall of the heating cavity. The opposite ends of the connecting portion are respectively connected to one of the electrode portions. The electrode portions are made of metal. The heating body is made of carbon fiber or graphite.

[0008] In one of the embodiments, each of the electrode portions is a metal layer covering one end surface of the connecting portion.

[0009] In one of the embodiments, the connecting portion comprises a plurality of straight segments and a plurality of curved segments. The straight segments are arranged along the circumference of the heating cup. The adjacent straight segments are connected in sequence by the curved segments. The two ends of the straight segments are disconnected and each has a free end. The free ends of the straight segments are respectively connected to one of the electrode portions.

[0010] In one of the embodiments, the two electrode portions are arranged at the same end of the heating cavity along the axis of the heating cavity. From the end of the heating cavity away from the electrode portions to the end of the heating cavity provided with the electrode portions, the resistance of the heating body gradually increases.

[0011] In one of the embodiments, from the end of the heating cavity away from the electrode portions to the end of the heating cavity provided with the electrode portions, the distance between the adjacent straight segments gradually increases, and / or the thickness of each straight segment gradually decreases, and / or the width of each straight segment gradually decreases.

[0012] According to another aspect of the present application, a manufacturing method of a heating assembly is provided, comprising the following steps:

[0013] S1, a heating body semi-finished product is prepared by using a graphite heating material or a carbon fiber heating material. The heating body semi-finished product has a strip structure.

[0014] S2, a metalization treatment is performed on the part of the heating body semi-finished product that needs to be connected to a power supply, so as to obtain a heating body.

[0015] S3, the heating body is connected to the inner wall of a heating cup, so as to obtain a heating assembly.

[0016] In one of the embodiments, in step S1, the following steps are included:

[0017] S11, a PI film is subjected to a heat treatment, so as to obtain the carbon fiber heating material.

[0018] Or, the PI film is subjected to a graphitization process, so as to obtain the graphite heating material.

[0019] S12, cutting the carbon fiber heating material or the graphite heating material into a long strip shape.

[0020] In one of the embodiments, when the target material of the heating element semi-finished product is the carbon fiber heating material, in step S11, the following steps are included:

[0021] S111, punching a plurality of micro-holes on the PI film, and winding the punched PI film to form a PI film roll;

[0022] S112, placing a graphite core into the PI film roll, and placing the PI film roll and the graphite core into a carbonization furnace together;

[0023] S113, heating the carbonization furnace and cooling it to room temperature;

[0024] S114, heating the carbonization furnace again in the atmosphere of nitrogen and helium, and cooling it to room temperature again to obtain the carbon fiber heating material.

[0025] In one of the embodiments, step S2 includes:

[0026] S21, shielding the remaining part of the heating element semi-finished product except the part to be connected to the power supply;

[0027] S22, plating a metal layer on the part of the heating element semi-finished product to be connected to the power supply to form a connecting part and an electrode part on the heating element semi-finished product.

[0028] In one of the embodiments, step S3 includes:

[0029] S31, laying the heating element flat and winding it around the inner wall of the heating cup, so that a plurality of straight line segments of the heating element are arranged in parallel and spaced apart;

[0030] S32, co-firing the heating element and the heating cup to connect the heating element to the inner wall of the heating cup.

[0031] The heating assembly, the electronic atomizer, and the manufacturing method of the heating assembly are based on the characteristics of the carbon material and the graphite material, such as high temperature resistance, difficulty in oxidation, strong heating explosion force, and high thermal conductivity, and based on the advantages of the carbon material, such as the ability to radiate infrared waves. The carbon fiber or graphite is selected as the material of the heating body in the heating assembly, and the heating body is connected to the inner wall of the heating cup in a strip structure with a certain length to form the heating assembly. The heating body is not easy to oxidize when heating, so that it can heat uniformly, and then the aerosol with uniform temperature can be formed in the heating cup. Further, the electrode part of the heating body connecting electrode is subjected to a metallization treatment, so that the surface of the electrode part is plated with a metal layer. The conductivity of the heating body is increased, and the welding of the high-temperature-resistant and difficult-to-melt material such as carbon fiber or graphite is realized, so that the heating body is easily connected to the wire and led to the power supply. The carbon material or graphite is used as the heating body, the problem of how to make the heating body have the characteristics of high temperature resistance and oxidation resistance, and how to connect the metal electrode is solved, and the taste of the user when using the electronic atomizer for smoking is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only one embodiment of the present application, and those skilled in the art can obtain other drawings of other embodiments according to these drawings without creative labor.

[0033] Figure 1 The three-dimensional structure schematic diagram of the heating assembly provided for the embodiments of the present application;

[0034] Figure 2 The cross-sectional view of the heating assembly provided for the embodiments of the present application;

[0035] Figure 3 The Figure 1 The enlarged schematic diagram of the A area in the middle.

[0036] Explanation of reference signs:

[0037] 10, heating assembly; 100, heating cup; 101, heating cavity; 200, heating body; 210, electrode part; 220, connecting part; 221, curved section; 223, straight section; 300, wire. DETAILED DESCRIPTION

[0038] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different manners without the specific details, and it is to be understood that the present application is not limited to the specific embodiments described below and shown in the drawings.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0041] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the liquid level of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the liquid level of the first feature is less than that of the second feature.

[0043] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, when a term is used in this specification and / or claims - such as "including", "containing", "comprising", "having" and / or the like - there are no limitations thereof and such terms are intended to permit the presence of other elements.

[0044] As described in the background, the heating assembly is the core component of the electronic atomizer, and the heating body in the heating assembly is the key component of the electric heating conversion. At present, most of the heating bodies of the electronic atomizer on the market are made of metal such as iron, chromium, aluminum, stainless steel, etc. Since the above materials often contain iron elements, oxidation is easy to occur during heating. After the heating body is oxidized, the surface is easy to accumulate carbon, thereby forming a rough surface, which is easy to cause uneven heating and affect the taste. If carbon material is used as the heating body, although the overall heating uniformity will be better than metal, since the carbon material is difficult to melt at high temperature, it is difficult to weld the carbon material, which leads to the difficulty of connecting the carbon material and the metal electrode. If the carbon material or graphite can be used as the heating body and the problem of difficult connection between the carbon material or graphite and the metal electrode is solved, the heating of the heating assembly will be more uniform, and the heating effect of the heating assembly will be greatly improved.

[0045] In order to solve the above problems, the present application provides a manufacturing method of a heating assembly and a heating assembly manufactured based on the manufacturing method, which can solve the problems of how to make the heating body have the characteristics of high temperature resistance and oxidation resistance, and how to connect the heating body and the metal electrode.

[0046] The structure of the heating assembly and the manufacturing method of the heating assembly provided by the present application will be described in detail below by taking an electronic cigarette as an example of the electronic atomizer. The electronic atomizer includes a heating assembly manufactured based on the manufacturing method of the heating assembly. The heating assembly is used to heat under the action of the electric energy provided by the battery in the electronic atomizer, so as to atomize the atomization medium in the electronic atomizer to generate aerosol for the user to inhale.

[0047] The present embodiment is only used as an example for illustration and does not limit the technical scope of the present application. It can be understood that in other embodiments, the heating assembly of the present application is not limited to be used in the electronic cigarette, but can also be used in any other type of atomizer and any other type of small electronic product, which is not limited herein.

[0048] The following will be described in combination with Figures 1 to 3The application provides a heating assembly and a manufacturing method thereof.

[0049] As shown in Figure 1 and Figure 2 , the heating assembly 10 of an electronic atomizer includes a heating cup 100, a heating body 200 arranged in the heating cup 100, and a wire 300 connected to the heating body. The heating cup 100 is used for allowing an atomization medium to permeate into the heating cup 100. The heating body 200 is used for being connected to a power supply through the wire 300, so that the heating body 200 generates heat under the action of the power supplied by the power supply, thereby being capable of heating the atomization medium permeated into the heating cup 100.

[0050] In some embodiments, the heating cup 100 is in a cylindrical structure. The cylindrical heating cup 100 forms a heating cavity 101 penetrating through the heating cup 100 along the axial direction of the heating cup 100. The heating body 200 is arranged in the heating cavity 101. Preferably, the material of the heating cup 100 is ceramic material. This is because the ceramic has excellent heat resistance, and the working temperature can be as high as 1000 DEG C. More preferably, the heating cup 100 is provided with a plurality of spaced-apart micropores. The atomization medium can permeate into the micropores through the micropores, so that the atomization medium can be heated and atomized by the heating body 200 arranged in the heating cavity 101 and then escape. When the electronic atomizer is not working, the micropores can lock the atomization medium in the heating cup 100, which is convenient for subsequent use.

[0051] Further, in a preferred embodiment, the heating cup 100 includes an oil guiding layer and an anti-permeation layer arranged coaxially. The micropores are arranged on the oil guiding layer. The anti-permeation layer does not have the micropores. The anti-permeation layer is located at the bottom of the oil guiding layer, i.e., at the end of the heating cup 100 close to the power supply. The anti-permeation layer can be integrally fired with the oil guiding layer, or can be sleeved on the outer circumferential surface of the oil guiding layer.

[0052] In this way, by arranging the anti-permeation layer in the heating cup 100, the atomization medium is prevented from permeating out of the micropores at the end of the heating cup 100 close to the power supply, thereby preventing the atomization medium from leaking onto the power supply to cause a short circuit, and preventing the atomization medium from being mixed in the aerosol and inhaled by the user due to leakage of the atomization medium, thereby improving the smoking taste.

[0053] In some embodiments, as shown in Figure 2 , the heating body 200 is in a strip-shaped structure, including two electrode portions 210 arranged at opposite ends of the heating body 200 and a connecting portion 220 arranged between the two electrode portions 210. The electrode portions 210 are used for being connected to the electrodes of the power supply or directly connected to the electrodes, so that the heating body 200 can generate heat.

[0054] Preferably, the material of the heating body 200 is carbon fiber or graphite. The reason for choosing carbon fiber or graphite as the material of the heating body 200 is that carbon fiber and graphite have better oxidation resistance when heated, and carbon fiber and graphite have a higher thermal conductivity, so they have better heating effect when heated. At the same time, since graphite itself has porosity and the fibers of carbon fiber have gaps that can penetrate the atomization medium, the atomization medium can penetrate more fully into the heating body 200 to be heated and atomized, thereby making the electronic atomizer have better taste and aerosol stability when in use. In addition, carbon fiber material not only has normal heat convection conduction, but also has infrared radiation function, so it can radiate infrared waves to the surrounding for heating. Based on the above characteristics, the carbon fiber or graphite as the heating body material is superior to metal material in many aspects,

[0055] More preferably, as shown in Figure 3 The heating body 200 is arranged along the circumference of the heating cup 100 on the side wall of the heating cavity 101, so that the two electrode parts 210 are arranged at one end of the heating cavity 101 along its own axis direction (i.e. the bottom end of the heating cavity 101) to connect the lead wire 30. Since carbon fiber and graphite have the characteristics of high temperature resistance and difficulty to melt, the outer surface of the electrode part 210 is covered with a metal layer, which can be a copper metal layer or a nickel metal layer, etc. In this way, by covering the metal layer on the outer surface of the electrode part 210, the electrode plate of the carbon fiber material or the graphite material is metallized, so that it can be conveniently connected with the lead wire 300 or the metal electrode part 210 by welding or other methods, solving the problem that carbon fiber or graphite material is not easy to connect with metal electrode.

[0056] In an embodiment, the connecting part 220 is S-shaped, including a plurality of curved segments 221 and a plurality of straight segments 223 arranged along the circumference of the heating cup. Among them, the two adjacent straight segments 223 are connected in sequence by a curved segment 221, and the two ends of each straight segment 223 are disconnected and each has a free end, and the free end of each straight segment 223 is connected with an electrode part 210.

[0057] Preferably, in order to make the heating of the heating body 200 more uniform, the bottom of the heating body 200 (i.e. the end of the heating body 200 close to the power source) needs to have a higher temperature, and the top of the heating body 200 (i.e. the end of the heating body 200 away from the power source) needs to have a lower temperature. Since the airflow flows from bottom to top, the temperature distribution in the heating cavity 101 is more uniform. According to the relationship that resistance is proportional to temperature, the higher the temperature, the greater the resistance. In order to make the bottom of the heating body 200 have a higher temperature, the resistance of the bottom of the heating body 200 needs to be set larger.

[0058] Therefore, from the end of the heat cavity 101 away from the electrode part 210 to the end of the heat cavity 101 provided with the electrode part 210, the distance between the two adjacent straight line segments 223 gradually increases, or the thickness of each straight line segment 223 gradually decreases, or the width of each straight line segment 223 gradually decreases, or the straight line segment 223 has the above three structures at the same time. In this way, by adjusting the density of the straight line segments 223 at the bottom of the heating body 200, the thickness or the width of the heating body 200, the resistance of the heating body 200 in the up-down direction can be changed, so that the heat emitted by the heating body 200 has a certain temperature gradient, and the temperature emitted from the heat cavity 101 is more uniform.

[0059] It should be noted that the winding structure of the heating body 200 on the inner wall of the heat cavity 101 is not limited to the structure mentioned above, but can be any structure. The winding structure described above is only one of the preferred embodiments, for example, it can also be spiral winding along the central axis direction of the heat cavity 101, and the specific structure is not limited.

[0060] Further, in combination with Figures 1 to 3 The manufacturing method of the heating assembly 10 will be introduced. The specific steps of the manufacturing method are as follows:

[0061] In the first step S1, a heating body semi-finished product is prepared by using a graphite heating material or a carbon fiber heating material, so that the heating body semi-finished product has a strip structure with a certain length. In this step, the specific preparation steps are different depending on the material of the heating body.

[0062] Specifically, since the raw material is a PI (polyimide) film, which has a thin film structure, it needs to be processed in a certain process to form the required long strip shape. Therefore, in this embodiment, in step S1, it further includes step S11, which is to heat treat the PI film to obtain a carbon fiber heating material, or to perform a graphitization process on the PI film to obtain a graphite heating material.

[0063] Specifically, in one embodiment, when the target material of the heating body semi-finished product is a carbon fiber heating material, in step S11, it further includes the following steps:

[0064] S111, a plurality of micro-holes are punched on the PI film, and the PI film after punching is wound to form a PI film roll. Preferably, the diameter of each micro-hole is 50-100 μm.

[0065] S112, the graphite core is placed in the PI film roll, and the PI film roll and the graphite core are placed in the carbonization furnace together. The purpose of placing the graphite core in the PI film roll is to fix the PI film as a carrier, so as to facilitate the overall heat treatment of the PI film in the carbonization furnace.

[0066] S113, the carbonization furnace is heated and cooled to room temperature. Specifically, in this step, the following steps are included:

[0067] S1131, the carbonization furnace is heated at a uniform speed of 10-12°C / min to 220-230°C, and kept for 1-2h;

[0068] S1132, the carbonization furnace is heated at a uniform speed of 10-12°C / min to 300-350°C, and kept for 3-4h;

[0069] S1133, the carbonization furnace is cooled to room temperature.

[0070] S114, the carbonization furnace is heated and cooled to room temperature in the atmosphere of nitrogen and helium respectively to obtain the heating element material. Specifically, in this step, the following steps are included:

[0071] S1141, the carbonization furnace is heated at a uniform speed of 3-5°C / min to 1250°C in the atmosphere of nitrogen, and kept for 2h;

[0072] S1142, the carbonization furnace is heated at a uniform speed of 3-5°C / min to 2800°C in the atmosphere of argon, and kept for 1-2h;

[0073] S1143, the carbonization furnace is cooled to room temperature.

[0074] Thus, the present inventors, through the above steps and repeated experiments, selected the above process parameters in the above steps, and finally prepared the required carbon fiber heating material through the PI film carbonization heat treatment process, without obtaining the unnecessary heating element material due to the excessively high or low temperature, or the insufficient or excessive carbonization due to the excessively short or long holding time.

[0075] In another embodiment, when the target material of the heating element semi-finished product is a graphite heating material, the PI film can also be subjected to a graphitization process to obtain a graphite heating material.

[0076] Then, in step S12, the carbon fiber heating material prepared through the above carbonization heat treatment process or the graphite heating material prepared through the graphitization process is cut into a long strip-shaped structure with a certain length.

[0077] The second step S2 is to perform a metallization process on the part of the heating element semi-finished product that needs to be connected to the electrode to obtain the heating element 200. Specifically, in this step, the following steps are included:

[0078] S21, shielding the remaining part of the heat-generating body semi-finished product except the part to be connected to the power supply. The purpose is to avoid the remaining part of the heat-generating body semi-finished product except the part to be connected to the power supply from being metallized, which can be achieved by winding the part with a protective film or shielding the heating part with a protective film.

[0079] S22, plating a metal layer on the part of the heat-generating body semi-finished product to be connected to the power supply to form the connecting part 220 and the electrode part 210 on the heat-generating body semi-finished product. As mentioned above, since the carbon fiber or graphite material is difficult to melt at high temperature, it is difficult to connect the electrode to the power supply or directly connect to the metal electrode. The purpose of this step is to make the part of the heat-generating body semi-finished product to be connected to the electrode metallizable, which can be achieved by plating a thin film of copper, nickel or other metals on the part of the heat-generating body semi-finished product to be connected to the electrode by PVD (Physical Vapor Deposition) or CVD (chemical vapor deposition) plating process, so as to form the connecting part 220 and the electrode part 210 on the heat-generating body semi-finished product, so that the final heat-generating body 200 can be welded with the metal electrode, solving the problem that the carbon fiber material or graphite material is difficult to weld with the metal.

[0080] It is worth noting that the metal thin film is not limited to copper or nickel thin film, but can also be other metal thin film as long as it can be welded with the metal.

[0081] The third step S3 is to connect the heat-generating body 200 to the inner wall of the heating cup 100 to obtain the heat-generating assembly 10.

[0082] Specifically, in this step, it includes:

[0083] S31, laying the heat-generating body 200 on the inner wall of the heating cup 100, so that the plurality of straight line segments 223 of the heat-generating body 200 are arranged in parallel with a certain looseness. Specifically, the heat-generating body 200 can be wound on the inner wall of the heating cavity 101 as described above, and the looseness of the laid heat-generating body 200 can be adjusted to make the heat-generating body 200 have a certain temperature gradient when heating to ensure uniform heating. In the laying process, the heat-generating body 200 can be temporarily fixed on the inner wall of the heating cavity 101 by adhesive tape.

[0084] S32, co-firing the heat-generating body 200 with the heating cup 100 to connect the heat-generating body 200 to the inner wall of the heating cup 100. In this way, the heat-generating body 200 is integrally connected with the heating cup 100, thereby forming the final heat-generating assembly 10.

[0085] In an embodiment, after step S2 and before step S3, a step S30 of connecting the wire 300 to the portion of the heat generating body 200 that is subjected to the metalization treatment, i.e. connecting the wire 300 to the electrode portion of the heat generating body 200 by welding or the like, can be further included, so that the heat generating assembly 10 includes the wire 300, thereby facilitating the connection of the heat generating assembly 10 to the power source.

[0086] Thus, the heat generating assembly 10 manufactured by the above manufacturing method is based on the characteristics of the carbon material and the graphite material, i.e. high temperature resistance and difficulty in oxidation, strong heat explosion and high thermal conductivity, and the advantage of the carbon material that it can radiate infrared waves, and selects carbon fiber or graphite as the material of the heat generating body 200 of the heat generating assembly 10, and makes the heat generating body 200 in the form of a strip to be wound on the inner wall of the heat generating cavity 101 in a certain winding shape, so that the heat generating body 200 is not easy to oxidize when generating heat and can generate heat uniformly, thereby forming a whole temperature uniform aerosol in the heating cup 100. Further, by subjecting the electrode portion 210 of the heat generating body 200 to the metalization treatment, the surface of the electrode portion 210 is plated with a metal layer, which not only increases the conductivity of the heat generating body 200, but also realizes the weldability of the high temperature resistant and difficult to melt material such as carbon fiber or graphite, so that it is easy to connect the wire 300 to the power source, thereby solving the problem of how to make the heat generating body 200 have the characteristics of high temperature resistance and oxidation resistance, and also be able to be connected to the metal electrode.

[0087] The technical features of the above embodiments can be combined arbitrarily, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

Claims

1. An electronic atomizer, characterized in that, The heating assembly comprises a heating cup and a heating body. The heating cup is made of ceramic and has a heating cavity extending through opposite ends in the axial direction. The heating body is connected to the inner wall of the heating cup by co-firing and comprises a connecting portion and two electrode portions. Each electrode portion is a metal layer covering one end of the connecting portion.

2. The electronic atomizer of claim 1, wherein, The heating cup comprises an oil guide layer and an anti-permeation layer arranged coaxially. The anti-permeation layer is located at the bottom of the oil guide layer, i.e., at the end of the heating cup close to the power supply. The oil guide layer is provided with micropores.

3. The electronic atomizer of claim 1, wherein, The connecting portion comprises a plurality of straight segments and a plurality of curved segments.

4. The electronic atomizer of claim 3, wherein, The two electrode portions are arranged at the same end of the heating cavity along the axial direction.

5. The electronic atomizer of claim 4, wherein, The resistance of the heating body gradually increases from the end of the heating cavity away from the electrode portions to the end of the heating cavity provided with the electrode portions.

6. A method of manufacturing the heating assembly in the electronic atomizer according to any one of claims 1-5, characterized in that, The distance between adjacent straight segments gradually increases, and / or the thickness of each straight segment gradually decreases, and / or the width of each straight segment gradually decreases. The method comprises the following steps: S1, preparing a heating body semi-finished product from a graphite heating material or a carbon fiber heating material, wherein the heating body semi-finished product has a strip structure; S2, performing metallization treatment on the part of the heating body semi-finished product that needs to be connected to the power supply to obtain a heating body; 7. The production method according to claim 6, wherein S3, connecting the heating body to the inner wall of a heating cup by co-firing to obtain a heating assembly. In step S1, the following steps are included: S11, performing heat treatment on a PI film to obtain the carbon fiber heating material; Or, performing graphitization process treatment on the PI film to obtain the graphite heating material; 8. The manufacturing method according to claim 7, wherein S12, cutting the carbon fiber heating material or the graphite heating material into a long strip structure. When the target material of the heating body semi-finished product is a carbon fiber heating material, the following steps are included in step S11: S111, punching a plurality of micropores on the PI film and forming a PI film roll by rewinding the punched PI film; S112, placing a graphite core into the PI film roll and placing the PI film roll and the graphite core into a carbonization furnace together; S113, heating the carbonization furnace and cooling it to room temperature; S114, heating the carbonization furnace again in the atmosphere of nitrogen and helium and cooling it to room temperature again to obtain the carbon fiber heating material.

9. The production method according to claim 6, wherein Step S2 comprises: S21, shielding the remaining part of the heating body semi-finished product except the part that needs to be connected to the power supply; S22, plating a metal layer on the part of the heating body semi-finished product that needs to be connected to the power supply, to form a connecting part and an electrode part on the heating body semi-finished product.

10. The production method according to claim 6, wherein Step S3 comprises: S31, laying the heating body flat and winding it around the inner wall of the heating cup, so that the multiple straight line segments of the heating body are arranged in parallel at intervals; S32, co-firing the heating body and the heating cup, so that the heating body is connected to the inner wall of the heating cup.

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