Electronic atomization device and heating mesh core therefor

Abstract

Disclosed in the present invention are an electronic atomization device and a heating mesh core therefor. The heating mesh core comprises a mesh-shaped heating portion and at least two pins connected to the mesh-shaped heating portion, wherein the resistivity of the pins is lower than that of the mesh-shaped heating portion; and a plurality of welding points that correspond to each of the pins are formed on the mesh-shaped heating portion, each of the pins being connected to the mesh-shaped heating portion by means of the plurality of welding points. In the heating mesh core of the present invention, the amount of heat generated at the junctions between the pins and the mesh-shaped heating portion is reduced, avoiding the deposition of carbon and the producion of a burning smell at the junctions, thus prolonging the life of the heating mesh core; and power allocated to the junctions is also reduced, so that the amount of heat generated by the mesh-shaped heating portion is ensured, helping improve atomization efficiency and ensuring the flavor of the electronic atomization device.

Description

Electronic atomization device and heating mesh core thereof

Technical field

[0001] The embodiments of the present invention relate to the field of electronic atomization technology, and in particular to an electronic atomization device and a heating network core thereof. [Background Technology]

[0002] The heating cores of current atomizing electronic cigarettes are mainly divided into spring wire and mesh core heating wire according to their shapes. Among them, compared with spring wire, mesh core heating wire has a larger heating area and higher atomization efficiency, so it can provide a more realistic taste.

[0003] A mesh heating wire generally consists of two parts: a mesh heating element and two round rod-shaped leads. The leads are spot-welded to the heating element, and the ends of the leads can be connected to the positive and negative terminals of a battery, respectively. When the heating wire is operating, current flows through the leads into the heating element, generating heat that heats the e-liquid, producing vapor.

[0004] Because the lead wire and the heating element are connected by a small number of solder points, the resistance at the connection point is relatively high. During power-on, the contact area between the two parts generates excessive heat, which can easily cause carbon deposits and even a burnt smell at the solder points, shortening the life of the heating wire. Furthermore, due to the high resistance at the solder point connection, the power originally intended for the heating element is over-divided, resulting in a decrease in the heat output of the heating element, reducing the atomization efficiency of the heating core, and causing a poor taste of the e-cigarette.

[0005] [Summary of the invention]

[0006] In view of the shortcomings of the existing technology, the present invention provides an electronic atomization device and a heating mesh core thereof, which can effectively reduce the resistance at the connection between the lead and the heating part, avoid carbon deposition or burnt smell at the connection, increase the life of the heating mesh core, and ensure the atomization efficiency of the heating mesh core and the taste of the electronic atomization device.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0008] A heating mesh core, used in an electronic atomization device, includes a mesh heating portion configured to generate heat when powered on and at least two pin portions connected to the mesh heating portion, wherein the resistivity of the pin portions is lower than that of the mesh heating portion; a plurality of welding points are formed on the mesh heating portion corresponding to each of the pin portions, and each of the pin portions is connected to the mesh heating portion through the plurality of welding points.

[0009] As one embodiment, the ratio of the total area of ​​the soldering points corresponding to each pin portion to the orthographic projection area of ​​the pin portion on the mesh heating portion is not less than 0.1, or the total area of ​​the soldering points corresponding to each pin portion is not less than 0.3mm 2 .

[0010] As one embodiment, the diameter of the welding point is not less than 0.5 mm, and / or the distance between adjacent welding points is less than the diameter of each welding point.

[0011] As one embodiment, a plurality of rows of welding points arranged side by side are formed on the mesh-shaped heating portion corresponding to each of the pin portions, and each of the pin portions is connected to the mesh-shaped heating portion via the plurality of rows of welding points.

[0012] As one embodiment, every two adjacent welding points are connected to each other to form a continuous welding line or welding surface.

[0013] As one embodiment, the heating mesh core further includes a welding material portion, which covers the welding point and is combined with the pin portion; the resistivity of the welding material portion is lower than the resistivity of the mesh heating portion and / or the resistivity of the pin portion.

[0014] As one embodiment, the solder material is partially attached to the outer peripheral surface of the pin portion, and the pin portion is covered on the surface of the mesh-shaped heating portion.

[0015] As one embodiment, the welding points are located at the end surfaces of both ends of the mesh heating portion in the length direction, and the pin portions are welded to the end surfaces of the mesh heating portion.

[0016] As one embodiment, the mesh heating part includes a main body and a conductive covering layer, the covering layer is located at least in the area where the welding point is located, the pin part is combined with the covering layer, and the resistivity of the covering layer is lower than the resistivity of the mesh heating part and / or the resistivity of the pin part.

[0017] As one embodiment, the material of the mesh heating part is at least one of iron-chromium-aluminum alloy, nickel-chromium alloy, nickel-chromium-iron alloy, nickel-iron alloy, silver alloy, and copper alloy; and / or the material of the pin part is at least one of nickel, gold, silver, platinum, nickel-chromium-iron alloy, nickel-chromium alloy, and iron-chromium-aluminum alloy.

[0018] As one embodiment, the mesh heating portion includes two connecting portions and at least two heating lines connected between the two connecting portions;

[0019] The welding point is located on the connecting portion and includes a main body portion, and each main body portion is arranged along the extending direction of the connecting portion;

[0020] At least one of the welding points includes an extension portion connected to the main body portion, the extension portion extends from the main body portion toward the heating circuit, and the width of the extension portion at one end close to the heating circuit is smaller than the width of the extension portion at one end close to the main body portion.

[0021] As one embodiment, the surface of the pin portion facing the mesh heating portion is a plane.

[0022] In one embodiment, the cross section of the pin portion is square.

[0023] As one embodiment, the pin portion is crimped or riveted to the mesh heating portion.

[0024] Another object of the present invention is to provide an electronic atomization device, comprising the above-mentioned heating mesh core.

[0025] In the heating mesh core of the present invention, since the resistivity of the pin part is lower than that of the mesh heating part, the heat generated at the junction of the pin part and the mesh heating part is less. On the one hand, carbon accumulation and burnt smell at the junction can be avoided, thereby extending the life of the heating mesh core. On the other hand, the power shared at the junction is reduced, and the heat generation of the mesh heating part is guaranteed, which is beneficial to improving the atomization efficiency and ensuring the taste of the electronic atomization device.

Brief Description of the Drawings

[0026] FIG1 is a schematic structural diagram of an electronic atomization device according to an embodiment of the present invention;

[0027] FIG2 is a schematic structural diagram of an atomizer core according to an embodiment of the present invention;

[0028] FIG3 is a schematic structural diagram of a heating network core according to an embodiment of the present invention;

[0029] FIG4A is a schematic structural diagram of another heating mesh core according to an embodiment of the present invention;

[0030] FIG4B shows a comparison of simulation results of the heating mesh core using two different welding processes;

[0031] FIG4C shows a comparison of the morphologies of the oil-conducting cotton after heating the heating mesh core using three different welding processes;

[0032] FIG4D shows a comparison of the inner surface morphology of the oil-conducting cotton after being heated by the heating mesh core using two different welding processes;

[0033] FIG5 is a schematic structural diagram of another heating network core according to an embodiment of the present invention;

[0034] FIG6 is a schematic diagram of the combination of the pin portion and the mesh heating portion at A in FIG5 ;

[0035] 7A to 7C are schematic diagrams of the junctions between three other types of pin portions and the mesh heating portion of the heating mesh core according to an embodiment of the present invention;

[0036] FIG8 shows a schematic structural diagram of another heating network core according to an embodiment of the present invention;

[0037] FIG9A shows a schematic structural diagram of a welding portion of a mesh-shaped heating element according to an embodiment of the present invention;

[0038] FIG9B shows a simulation result diagram of the heating mesh core shown in FIG9A ;

[0039] FIG9C shows a comparison of the morphology of the oil-conducting cotton after being heated by the heating mesh core shown in FIG9A and the heating mesh core using ordinary wire welding;

[0040] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. [Specific implementation method]

[0041] In the present invention, the terms "disposed," "provided with," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0042] The terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0045] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] The present application provides an electronic atomization device, which is used to atomize liquid into an aerosol for inhalation by a user.

[0047] As shown in Figure 1, the electronic atomization device includes an atomization component 1 and a battery component 2. The atomization component 1 includes an atomization core 10 and a shell 20. The shell 20 is internally formed with an oil storage tank 21, an atomization chamber 22, and an atomization channel 23. Among them, the battery component 2 is used to provide electrical energy for the atomization component and heat the atomization core 10; the oil storage tank 21 is used to store atomized liquid, and the atomization chamber 22 connects the oil storage tank 21 and the atomization channel 23. The atomization core 10 is installed in the atomization chamber 22. During the operation of the electronic atomization device, the atomized liquid in the oil storage tank 21 can enter the atomization chamber 22, and is heated and atomized by the atomization core 10 to generate an aerosol. As the user inhales, the aerosol can be sucked out through the atomization channel 23.

[0048] It can be understood that the battery assembly 2 can be located in the same shell as the atomizer assembly 1, or in a different shell from the atomizer assembly 1, so that the battery assembly 2 and the atomizer assembly 1 are set separately. When the atomizer assembly 1 or the battery assembly 2 needs to be replaced, only the corresponding part needs to be replaced, so that the product can be reused. Moreover, the battery assembly 2 can be recycled to reduce pollution and be more economical and environmentally friendly.

[0049] As shown in Figure 2, in one embodiment, the atomizer core 10 includes a heating mesh core 101 and a liquid guide member 102 in surface contact with the heating mesh core 101. The liquid guide member 102 can be liquid guide cotton, porous ceramics, etc., which is used to temporarily store the atomized liquid transmitted from the oil storage tank 21 and conduct it to the heating mesh core 101 in contact therewith; the heating mesh core 101 is electrically connected to the battery assembly 2, and can heat the atomized liquid transmitted by the liquid guide member 102 after power is turned on, thereby forming an aerosol.

[0050] Specifically, in the embodiment shown in FIG2 , the heating mesh core 101 is cylindrical, and the liquid guide member 102 is also cylindrical accordingly. The liquid guide member 102 is wrapped around the outer peripheral surface of the heating mesh core 101. After the atomizer core 10 is installed in the atomizer chamber 22, the atomizer core 10 is aligned axially with the atomizer chamber 22, and the hollow portion inside the atomizer core 10 is connected to the atomizer channel 23. It is understandable that in other embodiments, the heating mesh core 101 may also be sheet-shaped, and the liquid guide member 102 may also be sheet-shaped accordingly. The heating mesh core 101 is attached to one side of the liquid guide member 102, and the other side of the liquid guide member 102 may face the oil storage tank 21 to receive the atomized liquid transmitted from the oil storage tank 21.

[0051] As shown in Figure 3, the present application provides a heating mesh core 101, including a mesh heating portion 11 configured to generate heat when powered on and at least two pin portions 12 connecting the mesh heating portion 11, wherein the resistivity of the pin portions 12 is lower than the resistivity of the mesh heating portion 11.

[0052] In the heating mesh core of the present application, since the resistivity of the pin part is lower than that of the mesh heating part, the heat generated at the junction of the pin part and the mesh heating part is less. On the one hand, it can avoid carbon accumulation and burnt smell at the junction, thereby extending the life of the heating mesh core. On the other hand, it reduces the power shared at the junction, and the heat generated by the mesh heating part is guaranteed, which is beneficial to improving the atomization efficiency and ensuring the taste of the electronic atomization device.

[0053] Specifically, the mesh heating portion 11 and the pin portion 12 are welded together. A plurality of welding points P are formed on the mesh heating portion 11 corresponding to each pin portion 12. Each pin portion 12 is connected to the mesh heating portion 11 through a plurality of welding points P. The welding points P do not need to be filled with welding material. Laser welding is used to melt the material at the welding points P of the mesh heating portion 11 and then combine it with the pin portion 12. Since no welding material is required, the increase in connection resistance of the welding portion caused by the introduction of welding material can be avoided. Alternatively, the welding points P can also be filled with welding material, and the mesh heating portion 11 and the pin portion 12 can be welded together through the welding material.

[0054] For example, the ratio of the total area of ​​the soldering points P corresponding to each pin portion 12 to the orthographic projection area of ​​the pin portion 12 on the mesh heating portion 11 is not less than 0.1, such as 0.15, 0.2, 0.3, etc.; or the total area of ​​the soldering points P corresponding to each pin portion 12 is not less than 0.3mm 2 For example, 0.5mm 2 , 0.6mm 2 , 0.8mm 2After repeated experiments, the inventors found that when the setting of the welding point P meets any of the above-mentioned condition parameters, the heat generated at the junction of the pin portion 12 and the mesh heating portion 11 has little effect on the atomization effect, the life of the heating mesh core 101 is extended, and the taste of the aerosol is significantly improved.

[0055] In one embodiment, the welding point P does not need to be filled with welding material, and the material of the welding point P of the mesh heating part 11 is melted and combined with the pin part 12. At this time, since the resistivity of the pin part 12 is lower than the resistivity of the mesh heating part 11, the resistance at the junction of the pin part 12 and the mesh heating part 11 is small, so the heat generated at this location is small, which is conducive to reducing the temperature and power loss at this location. Under the same heating power conditions, the atomization efficiency of the mesh heating part 11 is higher. Exemplarily, the material of the mesh heating part 11 is at least one of iron-chromium-aluminum alloy, nickel-chromium alloy, nickel-chromium-iron alloy, nickel-iron alloy, silver alloy, and copper alloy; the material of the pin part 12 is at least one of nickel, gold, silver, platinum, nickel-chromium-iron alloy, nickel-chromium alloy, and iron-chromium-aluminum alloy. For example, when the material of the mesh heating part 11 is iron-chromium-aluminum, the material of the pin part 12 can be nickel, aluminum, silver, gold, etc. with lower resistivity.

[0056] In the embodiment shown in Figure 3, the distance between adjacent welding points P is less than the diameter of each welding point P. By reducing the distance between the welding points P, the number of welding points P can be increased, the contact area between the mesh heating portion 11 and the pin portion 12 can be increased, the contact resistance between the mesh heating portion 11 and the pin portion 12 can be reduced, the heat loss therein can be reduced, and the atomization capacity and service life of the heating mesh core 101 can be improved. Experimental verification shows that the amount of smoke generated by the heating mesh core 101 using such welding points P can be increased by at least 10% and the service life can be increased by 30%. For example, the diameter of the welding point P is not less than 0.5 mm.

[0057] Compared with welding the mesh heating part 11 and the heating mesh core of each pin part 12 using 4 welding points P with a diameter of less than 0.4 mm, welding the mesh heating part 11 and the heating mesh core of each pin part 12 using 8 welding points P with a diameter of 0.5 mm has smaller contact resistance, lower heating loss, significantly increased amount of smoke generated by heating, and significantly improved service life.

[0058] Usually, at the welding point P, the mesh heating part 11 and the pin part 12 are combined; at the non-welding point P, the mesh heating part 11 and the pin part 12 are combined by pressing or other means, but in fact, through the SEM (scanning electron microscope) image at the soldering point, it is found that the pressing part seems to be tightly combined, but there is actually no material filling in the middle, and the contact performance is not good, resulting in a small flow area between the mesh heating part 11 and the pin part 12, a large connection resistance, and a large heat generation, and the bonding strength between the two is insufficient, and it is very easy to tear apart.

[0059] FIG4A is a schematic structural diagram of another heating network core according to an embodiment of the present invention.

[0060] As shown in Figure 4A, in another embodiment, every two adjacent welding points P are connected to form a continuous welding line or welding surface, achieving a line welding effect. By increasing the number of welding points P to a certain level, the welding points P are connected or overlapped with each other, so that the welding points of the mesh heating portion 11 and the lead portion 12 are continuously connected. The line welding trajectory can be a straight line or a curve.

[0061] As shown in Figure 4B, a schematic diagram of the simulation results of the heating mesh core with four welding points and the heating mesh core with wire welding is shown. The left side of the figure shows the power density distribution diagram and temperature distribution diagram of the heating mesh core 101 with four welding points P, and the right side shows the power density distribution diagram and temperature distribution diagram of the heating mesh core 101 with wire welding.

[0062] Through software simulation, the simulation results of the heating mesh core 101 under three process conditions, namely 4 welding points P, 8 welding points P, and wire welding, with a constant voltage current of 3.7V, were compared. It was found that the maximum electric power density near the welding points in the process with 4 welding points P was 1.8e10W / m3, the maximum electric power density near the welding points in the process with 8 welding points P was 1.1e10W / m3, and the maximum electric power density near the welding points in the process with wire welding was 4.5e8 W / m3. The maximum power density differed by 40 times. That is, by increasing the number of welding points, the power loss can be effectively reduced and the atomization efficiency can be improved.

[0063] As shown in Figure 4C, the fouling of the oil-conducting cotton of the electronic atomization device with a heating mesh core under three process conditions of 4 welding points P, 8 welding points P and wire welding after 800 puffs is shown. Among them, from left to right are 4-welding point sample 1, 8-welding point sample 1, 4-welding point sample 2, 8-welding point sample 2, and wire welding sample. It can be seen that the fouling of 4-welding point sample 1 and 4-welding point sample 2 is the most serious, the fouling of 8-welding point sample 1 and 8-welding point sample 2 has been significantly improved, and the fouling of the wire welding sample is the least; as shown in Figure 4D, a physical picture of the inner surface of the oil-conducting cotton of the electronic atomization device with different heating mesh cores after 800 puffs is shown, among which the picture A on the left corresponds to the oil-conducting cotton of the heating mesh core with 4 welding points, and the picture B on the right corresponds to the oil-conducting cotton of the heating mesh core with 8 welding points. In this electronic atomization device, the oil-conducting cotton is coated on the outer peripheral surface of the heating mesh core, and the heating mesh core is heated to atomize the atomized liquid adsorbed by the oil-conducting cotton. Experimental results revealed that a heating mesh core with four solder points (P) on the leads compared to a heating mesh core with eight solder points (P). After being pumped through an 800-port machine and disassembled, the heating mesh core with four solder points had significantly more fouling than the one with eight. Furthermore, during separation from the oil-conducting cotton, the heating mesh core pulled more cotton fibers off the pin soldering points. A comparison of the fouling inside the oil-conducting cotton revealed that the heating mesh core with four solder points had significantly more fouling than the one with eight. From the side, the heating mesh core with four solder points almost "burned through" the multiple layers of oil-conducting cotton, resulting in higher heat loss at the pin 12 of the heating mesh core with four solder points. Therefore, the improvement in fouling with a heating mesh core with eight solder points is consistent with the simulation results: increasing the flow area at the solder points and reducing the connection resistance can effectively reduce heat generation at the pins, thereby reducing fouling. It is understood that the number of solder points (P) is not limited to eight and can be four or more, preferably eight or more.

[0064] In one embodiment, the mesh heating portion 11 is formed with multiple rows of welding points P arranged side by side corresponding to each pin portion 12, and each pin portion 12 is connected to the mesh heating portion 11 via the multiple rows of welding points P. In other words, the circumference of the same pin portion 12 is welded to the mesh heating portion 11 via the multiple rows of welding points P, which can further increase the contact area between the pin portion 12 and the mesh heating portion 11, reducing heat generation and resistance at the junction.

[0065] FIG5 is a schematic structural diagram of another heating mesh core according to an embodiment of the present invention; FIG6 is a schematic diagram of the combination of the pin portion at A in FIG5 and the mesh heating portion.

[0066] Considering that when the pin portion 12 is a round rod, when the pin portion 12 contacts the planar mesh heating portion 11, the pin portion 12 can only make line contact with the mesh heating portion 11 at the tangent point, resulting in too small a contact area between the two, thereby causing the contact resistance when the current passes through the heating mesh core to be too large, generating heat that is originally unnecessary, which not only shares the heat of the heating plate but also easily causes high-temperature core burns and shortened life at the lead. Therefore, as shown in Figures 5 and 6, in one embodiment, the surface of the pin portion 12 facing the mesh heating portion 11 is a plane. For example, the cross-section of the pin portion 12 is square, that is, the pin portion 12 is a square rod. The pin portion 12 of this embodiment and the mesh heating portion 11 are in contact through plane-to-plane lamination, which can greatly increase the contact area between the pin portion 12 and the mesh heating portion 11, thereby reducing the generation of contact resistance, improving the energy utilization rate of the mesh heating portion 11, reducing the generation of carbon deposits, and improving the life of the product.

[0067] 7A to 7C are schematic diagrams of the connection parts between several other pin portions and the mesh heating portion of the heating mesh core according to an embodiment of the present invention.

[0068] As shown in FIG7A , in one embodiment, the heating mesh core 101 includes, in addition to the mesh heating portion 11 and the pin portion 12, a welding material portion 13. The welding material portion 13 covers the welding point P and is bonded to the pin portion 12. The resistivity of the welding material portion 13 is lower than that of the mesh heating portion 11, or the resistivity of the welding material portion 13 is lower than that of the pin portion 12, or the resistivity of the welding material portion 13 is lower than that of both the mesh heating portion 11 and the pin portion 12.

[0069] For example, the mesh heating element 11 is made of at least one of an iron-chromium-aluminum alloy, a nickel-chromium alloy, a nickel-chromium-iron alloy, a nickel-iron alloy, a silver alloy, and a copper alloy; the lead portion 12 is made of at least one of nickel, gold, silver, platinum, a nickel-chromium-iron alloy, a nickel-chromium alloy, and an iron-chromium-aluminum alloy. For example, the welding material portion 13 can be made of the same material as the lead portion 12, and its resistivity is lower than that of the mesh heating element 11.

[0070] In one embodiment, the solder portion 13 may be attached to the outer circumference of the pin portion 12, and the pin portion 12 may be wrapped around the surface of the mesh heating portion 11. It is understood that in other embodiments, the entire outer circumference of the pin portion 12 may not be wrapped, but only the contact area between the pin portion 12 and the mesh heating portion 11 may be filled, with the solder portion 13 serving as a bonding material.

[0071] Specifically, when welding the solder portion 13 to the mesh heating portion 11 and the pin portion 12, the pin portion 12 can be placed directly above the mesh heating portion 11. The solder portion 13 is then applied to the connection between the pin portion 12 and the mesh heating portion 11 by coating or printing. The product coated with the solder portion 13 is then heated and welded. After heating, the solder portion 13 is melted, welding the mesh heating portion 11 and the pin portion 12 together. Through this arrangement, the contact area between the mesh heating portion 11 and the pin portion 12 is greatly increased, which can effectively reduce the contact resistance between the mesh heating portion 11 and the pin portion 12.

[0072] During the actual simulation process, it was found that by changing the material of the welding material part 13, under online welding conditions, the material of the welding material part 13 was replaced from iron-chromium-aluminum with lower electrical conductivity (the same material as the heating core mesh heating part 11) to nickel with higher electrical conductivity (the same material as the pin part 12). The maximum electric power density at the soldering point decreased from 4.5e8 W / m3 to 1.2e8 W / m3, and the electric power loss density at the soldering point could be reduced to 1 / 3.

[0073] As shown in Figures 7B and 7C , in one embodiment, the mesh heating portion 11 includes a main body 11A and a conductive covering layer 11B. The covering layer 11B is located at least in the area where the welding point P is located. The pin portion 12 is bonded to the covering layer 11B, and the resistivity of the covering layer 11B is lower than the resistivity of the mesh heating portion 11 and / or the resistivity of the pin portion 12. Exemplarily, the material of the covering layer 11B includes, but is not limited to, metal materials such as silver, gold, aluminum, and nickel, as well as conductive ceramic materials such as aluminum nitride, silicon nitride, titanium nitride, and aluminum oxide.

[0074] The covering layer 11B may be formed on the surface of the main body 11A by plating, or may be formed on the surface of the main body 11A by other composite methods.

[0075] By forming a covering layer 11B on the surface of the mesh-shaped heating element 11, the covering layer 11B can be welded to the lead portion 12, with the welding point P located on the surface of the covering layer 11B. For example, as shown in FIG7B , when there is no solder portion 13, the lead portion 12 can be directly welded to the covering layer 11B, which can be achieved by melting the covering layer 11B. For example, as shown in FIG7C , when there is a solder portion 13, the solder portion 13 can be solidified to allow the lead portion 12 to be welded to the covering layer 11B.

[0076] Normally, the mesh heating portion 11 and the pin portion 12 of the heating mesh core 101 are overlap-welded, that is, the pin portion 12 is welded to one side of the mesh heating portion 11 in the thickness direction. As shown in Figure 8, a different heating mesh core 101 is shown, in which the mesh heating portion 11 and the pin portion 12 of the heating mesh core 101 are combined together by side welding, that is, the welding point P of this embodiment is located at the end face of the mesh heating portion 11 (such as the two end faces in the length direction of the mesh heating portion 11 in Figure 8), and the pin portion 12 is welded to the end face of the mesh heating portion 11. The "end face" here refers to the two ends in the length direction of the mesh heating portion 11 in the unfolded state. After the mesh heating portion 11 is wound into a cylindrical shape, the two pin portions 12 are respectively located at the two ends of the circumference of the mesh heating portion 11 and face each other. In this way, when the oil-conducting cotton is wrapped around the surface of the mesh heating portion 11, the welded portion of the mesh heating portion 11 and the pin portion 12 can also maintain contact with the oil-conducting cotton, thereby improving the atomization efficiency.

[0077] As shown in Figure 9A, in one embodiment, the mesh heating portion 11 includes two connecting portions 111 and at least two heating circuits 112 connected between the two connecting portions 111. The at least two heating circuits 112 are arranged in parallel between the two connecting portions 111. The two connecting portions 111 are respectively welded to two pin portions 12, thereby forming a loop between the pin portions 12 at both ends and the heating circuits 112. When the pin portions 12 at both ends are energized, the heating circuits 112 can be heated to atomize the tobacco oil in the oil-conducting cotton.

[0078] Specifically, the welding points P are located on the connecting portion 111 and include a main portion P1, each of which is arranged along the extension direction of the connecting portion 111. For example, when the welding points P are multiple separated regions, the main portions P1 are arranged at intervals along the extension direction of the connecting portion 111; when the welding points P are connected to form a continuous line welding track, the main portions P1 are connected to form a linear region arranged along the extension direction of the connecting portion 111.

[0079] At least one welding point P includes an extension P2 connected to the main body P1, extending from the main body P1 toward the heating circuit 112. Because the welding point P includes the extension P2, current can enter through the pin portion 12 and flow sequentially through the main body P1 and the extension P2 toward the heating circuit 112. The current can be directed directly to a location near the heating circuit 112 via the extension P2, thereby shortening the distance of the conductive path. In particular, when the welding points P are arranged continuously to form a wire bond track, the extension P2 reduces the contact resistance between the pin portion 12 and the mesh heating portion 11 compared to a wire bonding process, thereby improving heat generation at the weld.

[0080] Furthermore, the width of the extension portion P2 at the end close to the heating circuit 112 can be set to be smaller than the width of the end close to the main portion P1. For example, the extension portion P2 can be set to be triangular, and the free end of the extension portion P2 is tapered, so that the width of the extension portion P2 gradually decreases along the direction away from the main portion P1. In this way, on the one hand, the area of ​​the welding point P can be avoided from being too large, and the complexity of welding will not be increased. The position of the welding point has little effect on temperature diffusion, and the temperature distribution of the heating mesh core 101 is basically the same as that of wire welding. On the other hand, the welding point P can be as close to the heating circuit 112 as possible to shorten the distance of the conductive path. On the other hand, the width of the welding point P in the direction close to the pin portion 12 is the largest, which can avoid the heat of the heating circuit 112 being dispersed in the part close to the pin portion 12 when it is conducted to the welding point P, thereby avoiding causing a significant temperature rise at the pin and affecting the life of the welding point.

[0081] The extensions P2 at the upper and lower ends of the pin portion 12 can be arranged to be inclined toward each other. For example, the heating circuit 112 can extend at both ends in the longitudinal direction in directions away from each other (such as the longitudinal outward expansion direction in FIG. 9A ), thereby forming a trapezoid with the connecting portion 111. The connection between the end of the heating circuit 112 and the connecting portion 111 can be arranged to form an arc chamfer C. The extension line of the free end of the extension P2 can be arranged to be tangent to the arc chamfer C to prevent heat transfer due to being too close to the heating circuit 112.

[0082] Figure 9B shows the simulation results of the heating mesh core 101 shown in Figure 9A; Figure 9C shows a comparison of the morphology of the oil-conducting cotton after 1300 puffs of suction from the heating mesh core 101 shown in Figure 9A and the heating mesh core 101 with ordinary wire welding. The left picture corresponds to the heating mesh core 101 shown in Figure 9A, and the right picture corresponds to the heating mesh core 101 with ordinary wire welding. It can be seen that the heat of the mesh heating part 11 is mainly concentrated in the heating circuit 112, the temperature of the pin part 12 is relatively low, the oil-conducting cotton around the heating mesh core 101 with the extended portion P2 is lighter in color, and the heat at the welding point is not obvious.

[0083] In addition, the pin portion 12 and the mesh heating portion 11 of the present application can also be directly crimped or riveted, or they can be combined by crimping or riveting and then welded together in the above manner.

[0084] The above is only a specific implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A heating mesh core, used in an electronic atomization device, characterized in that: It includes a mesh heating portion configured to generate heat when power is supplied and at least two pin portions connecting the mesh heating portion, wherein the resistivity of the pin portions is lower than that of the mesh heating portion; a plurality of welding points are formed on the mesh heating portion corresponding to each of the pin portions, and each of the pin portions is connected to the mesh heating portion via the plurality of welding points.

2. The heating network core according to claim 1, characterized in that: The ratio of the total area of ​​the soldering points corresponding to each pin portion to the orthographic projection area of ​​the pin portion on the mesh heating portion is not less than 0.1, or the total area of ​​the soldering points corresponding to each pin portion is not less than 0.3 mm 2 .

3. The heating mesh core according to claim 1, characterized in that: The diameter of the welding point is not less than 0.5 mm, and / or the distance between adjacent welding points is less than the diameter of each welding point.

4. The heating mesh core according to claim 1, characterized in that: Every two adjacent welding points are connected to each other to form a continuous welding line or welding surface.

5. The heating network core according to claim 1, characterized in that: It also includes a welding material part, which covers the welding point and is combined with the pin part; the resistivity of the welding material part is lower than the resistivity of the mesh heating part and / or the resistivity of the pin part.

6. The heating network core according to claim 1, characterized in that: The welding points are located at the end surfaces at both ends of the length direction of the mesh-shaped heating portion, and the pin portion is welded to the end surfaces of the mesh-shaped heating portion.

7. The heating network core according to claim 1, characterized in that: The mesh heating part includes a main body and a conductive covering layer, the covering layer is located at least in the area where the welding point is located, the pin part is combined with the covering layer, and the resistivity of the covering layer is lower than the resistivity of the mesh heating part and / or the resistivity of the pin part.

8. The heating mesh core according to claim 1, characterized in that: The material of the mesh heating part is at least one of iron-chromium-aluminum alloy, nickel-chromium alloy, nickel-chromium-iron alloy, nickel-iron alloy, silver alloy, and copper alloy; and / or the material of the pin part is at least one of nickel, gold, silver, platinum, nickel-chromium-iron alloy, nickel-chromium alloy, and iron-chromium-aluminum alloy.

9. The heating network core according to any one of claims 1 to 8, characterized in that: The mesh heating portion includes two connecting portions and at least two heating lines connected between the two connecting portions; The welding point is located on the connecting portion and includes a main body portion, each of which is arranged along the extension of the connecting portion. Layout in extension direction; At least one of the welding points includes an extension portion connected to the main body portion, the extension portion extends from the main body portion toward the heating circuit, and the width of the extension portion at one end close to the heating circuit is smaller than the width of the extension portion at one end close to the main body portion.

10. An electronic atomization device, characterized in that: It comprises the heating mesh core as described in any one of claims 1 to 9.

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