Heating element for atomization core of electronic cigarette, atomization core and manufacturing method therefor, and electronic cigarette

Abstract

The present invention provides a heating element for an atomization core of an electronic cigarette, an atomization core and a manufacturing method therefor, and an electronic cigarette. The heating element comprises two contacts for energization and heating wires electrically connected to the two contacts; each heating wire has at least one wide portion and / or narrow portion, the wire width of the wide portion is greater than the wire width of the remaining portion of the heating wire, and the wire width of the narrow portion is less than the wire width of the remaining portion of the heating wire. The atomization core comprises the heating element, and the electronic cigarette comprises the atomization core. The heating element provided by the present invention can rapidly heat the e-liquid in an absorption body, and control the heating rate of each local area, so as to ensure that the temperature distribution of the absorption body is more uniform, thereby improving the atomization efficiency of the e-liquid.

Description

Heating element for electronic cigarette atomizing core, atomizing core and manufacturing method thereof, and electronic cigarette TECHNICAL FIELD

[0001] The present application relates to the field of atomizing cores, in particular to a heating element for an electronic cigarette atomizing core, an atomizing core and a manufacturing method thereof, and an electronic cigarette. BACKGROUND

[0002] The core component of an electronic cigarette is an atomizing core, which comprises a tobacco tar adsorption body and a heating element. The heating element forms mist by heating the tobacco tar infiltrated / stored in the adsorption body of the atomizing core. The performance of the atomizing core affects the amount of smoke inhaled, the taste and the number of puffs. The present application innovatively improves the temperature distribution on the heating element and the synergy between multiple heating lines, so that the atomization efficiency is higher, the smoke reduction is more sufficient, and the puffing life is longer.

[0003] At present, most heating circuits use a continuous equal-width design of heating line patterns. This design has the following problems: for areas with dense heating line arrangement, the continuous equal-width design of heating lines will cause the heat to accumulate in the dense wiring area, thereby causing the local temperature on the surface of the adsorption body to be too high, and the blank area on the adsorption body where no heating line is laid will need to wait for heat to be transferred to it before gradually warming up, i.e., the temperature balance of each position on the surface of the adsorption body cannot be guaranteed. This design that relies on a single heating area to warm up will result in low atomization efficiency of the heating circuit for the tobacco tar in the adsorption body.

[0004] Therefore, how to enable the heating element to quickly heat the tobacco tar in the adsorption body and control the warming-up speed of each local area to ensure that the temperature distribution of the adsorption body is more uniform, thereby improving the atomization efficiency of the tobacco tar, needs to be solved urgently. SUMMARY

[0005] The present application aims to provide a heating element for an electronic cigarette atomizing core, an atomizing core and a manufacturing method thereof, and an electronic cigarette, so that the heating element can quickly heat the tobacco tar in the adsorption body and control the warming-up speed of each local area to ensure that the temperature distribution of the adsorption body is more uniform, thereby improving the atomization efficiency of the tobacco tar.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A heating element for an electronic cigarette atomizing core, the heating element comprising two contacts for electrification and a heating line electrically connected to the two contacts:

[0008] At least one of the heating lines has at least one region with a line width different from that of the remaining regions.

[0009] The heating line has at least one wide part and / or narrow part.

[0010] In the same heating wire, the line width of the wide part is greater than the line width of the rest of the heating wire, and the line width of the narrow part is less than the line width of the rest of the heating wire.

[0011] In some embodiments of the present application, the number of the heating wires is at least two.

[0012] In some embodiments of the present application, among all the heating wires, the two narrow parts with the smallest width size are respectively located on two of the heating wires.

[0013] In some embodiments of the present application, the two narrow parts with the smallest width size are respectively located on a first heating wire and a second heating wire in the heating wires, and the line width of one of the narrow parts is A, the line width of the other narrow part is B, and A:B = 1:(1.1-2.5).

[0014] In some embodiments of the present application, among all the heating wires, the two wide parts with the largest width size are respectively located on two of the heating wires.

[0015] In some embodiments of the present application, the two wide parts with the largest width size are respectively located on a third heating wire and a fourth heating wire in the heating wires, and the line width of one of the wide parts is C, the line width of the other wide part is D, and C:D = 1:(1.1-2.5).

[0016] In some embodiments of the present application, the same heating wire has at least two narrow parts, the line width of one of the narrow parts with the smallest line width is E, the line width of one of the narrow parts with the smallest line width among the rest of the narrow parts is F, and E:F = 1:(1.1-1.5).

[0017] In some embodiments of the present application, the same heating wire has at least two wide parts, the line width of one of the wide parts with the largest line width is G, the line width of one of the wide parts with the largest line width among the rest of the wide parts is H, and G:H = (1.1-1.5):1.

[0018] In some embodiments of the present application, in the same heating wire, the width size of one of the narrow parts with the largest width size is J, the width size of one of the wide parts with the smallest width size is K, and J:K = 1:(1.1-1.5).

[0019] In some embodiments of the present application, the heating wire is a smooth curve and / or a straight line, and the smooth curve includes at least one curved part.

[0020] In some embodiments of the present application, the curved part is at least one of a C-shaped, U-shaped, V-shaped, L-shaped, or J-shaped.

[0021] In some embodiments of the present application, the smooth curve comprises at least two curved portions, and each two adjacent curved portions are smoothly connected and form at least one of S shape, M shape, W shape, N shape or Z shape.

[0022] In some embodiments of the present application, the heating wire and the contact are integrally formed, and are preferably made of a resistance paste through high-temperature sintering.

[0023] Alternatively, the heating wire and the contact are electrically connected through a conductive medium.

[0024] To achieve the above object, the present application further provides the following technical solutions.

[0025] An atomizing core, comprising an adsorbent body capable of adsorbing tobacco tar and having a porous structure, and a heating body as described above arranged in contact with the adsorbent body.

[0026] In some embodiments of the present application, the adsorbent body is made of ceramic or glass.

[0027] To achieve the above object, the present application further provides the following technical solutions.

[0028] A manufacturing method of the atomizing core as described above, comprising the following steps:

[0029] S1, providing an adsorbent body and a resistance paste for manufacturing a contact and a heating wire;

[0030] S2, applying the resistance paste to a surface of the adsorbent body to form a heating circuit pattern comprising the contact and the heating wire;

[0031] S3, high-temperature sintering the adsorbent body with the heating circuit pattern to obtain the atomizing core.

[0032] In some embodiments of the present application, between the steps S1 and S2, a groove is processed on the surface of the adsorbent body, and the groove is used for accommodating the resistance paste.

[0033] In some embodiments of the present application, before the step S1, the adsorbent body is prepared through a flow layering process or an injection process.

[0034] To achieve the above object, the present application further provides the following technical solutions.

[0035] An electronic cigarette, comprising:

[0036] The atomizing core as described above; and

[0037] A power supply connected to the contact of the atomizing core and used for supplying power to the heating body of the atomizing core.

[0038] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0039] The heating body provided by the present application can quickly heat the tobacco tar in the adsorption body and ensure that the temperature distribution of the adsorption body is more uniform, thereby improving the atomization efficiency of the tobacco tar; the atomization core and the electronic cigarette using the heating body can provide a better smoking experience; wherein the heating wire in the heating body is provided with a wide part and / or a narrow part with varying widths to accurately control the temperature rising speed of each local position on the heating wire, thereby providing accurate heating effect for each local position on the surface of the adsorption body containing the tobacco tar, to improve and enhance the tobacco tar gasification explosion effect of each local area on the adsorption body. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0041] Fig. 1 is a structural schematic view of the heating body provided by the first embodiment of the present application;

[0042] Fig. 2 is a structural schematic view of the heating body provided by the second embodiment of the present application;

[0043] Fig. 3 is a structural schematic view of the heating body provided by the third embodiment of the present application;

[0044] Fig. 4 is a structural schematic view of the heating body provided by the fourth embodiment of the present application;

[0045] Fig. 5 is a structural schematic view of a heating body in the prior art;

[0046] Fig. 6 is a structural schematic view of the heating body provided by the fifth embodiment of the present application;

[0047] Fig. 7 is a structural schematic view of the atomization core provided by the sixth embodiment of the present application.

[0048] The main reference signs in the drawings of the present application specification are explained as follows:

[0049] 1-heating body; 11-contact; 12-heating wire; 121-wide part; 122-narrow part; 123-bent part;

[0050] 2-adsorption body. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0052] It should be understood that the specific embodiments described herein are merely exemplary and illustrative and are not intended to limit the present application.

[0053] Any specific numerical values (including the endpoints of any numerical range) disclosed herein are not to be construed as limiting, but rather as approximations. Any numerical value, however, can contain certain errors associated with measurement of physical quantities, as well as with the rounding off of such values to the required number of significant digits. Also, any numerical range recited herein is intended to include all sub-ranges of the same numbers, as well as the range expressed by the smallest and largest numbers in the lists. For example, a range of 1 to 10 is intended to include all sub-ranges between and including the values of 1 and 10, e.g., 1 to 6.1, 1 to 5.1, 1 to 4.1, 1 to 3.1, 1 to 3, 2 to 10, 3 to 10, 5.5 to 10, etc.

[0054] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. If there is a conflict between the definitions of terms in the specification and the term definitions provided in the art, the term definitions provided in the specification control.

[0055] It is worth mentioning that the "wide part" in the present application refers to the part with widened line width on the same heating wire, and the "narrow part" refers to the part with narrowed line width on the same heating wire; wherein the line width of the wide part is greater than the average line width of the heating wire where the wide part is located, and the line width of the narrow part is less than the average line width of the heating wire where the narrow part is located; in other words, the above definitions of the wide part and the narrow part are based on the comparison of the internal conditions of the same heating wire, and the comparison of the wide part and the narrow part on multiple heating wires in the same embodiment can be described separately, for example, the average line widths of two or three or more heating wires can not be the same in some embodiments. In addition, it can be understood that the core idea of the design of the heating wire adopted by the present application is the variable-diameter design, that is, there are local areas with different diameters or line widths on the same heating wire.

[0056] First aspect

[0057] Referring to FIGS. 1 to 4 and 6, a heating body 1 for an electronic cigarette atomizer includes two contacts 11 for power supply and heating wires 12 electrically connected with the two contacts 11; at least one of the heating wires 12 has at least one area with a line width different from that of the remaining areas.

[0058] Referring to FIGS. 1-4 and 6, in some embodiments of the present application, the heating wire 12 has at least one wide portion 121 and / or narrow portion 122; in the same heating wire 12, the line width of the wide portion 121 is greater than the line width of the rest of the heating wire 12, and the line width of the narrow portion 122 is less than the line width of the rest of the heating wire 12.

[0059] It can be understood that, referring to FIG. 7, the heating body 1 described above is covered on the surface of the adsorption body 2 of the electronic cigarette atomizer, so as to heat the tobacco tar in the adsorption body 2, atomize the tobacco tar, and provide the user with a smoking experience.

[0060] Specifically, for each heating wire 12, the current flowing through the heating wire 12 at different positions is equal due to the same or similar principle of the circuit in series. Therefore, for the coverage area of the heating wire 12 on the surface of the adsorption body 2, the coverage area can be further divided into multiple areas of smaller ranges, some of which are designed to have a faster heating speed and some of which are designed to have a slower heating speed. Therefore, the heating amount of each coverage area can be controlled by designing the heating wire 12 to have a wider or narrower line width. It can be understood that, in the same heating wire 12, the wide portion 121 has a wider line width, so that the cross-sectional area for the current to flow through is increased, and thus the resistance of the wide portion 121 is reduced, and the heating amount of the wide portion 121 is reduced. On the other hand, the narrow portion 122 has a narrower line width, so that the cross-sectional area for the current to flow through is decreased, and thus the resistance of the narrow portion 122 is increased, and the heating amount of the narrow portion 122 is increased. In summary, by controlling the line width difference of the heating wire 12 at different positions, the heating amount of each local area in the heating area covered by the same heating wire 12 is different, so as to achieve precise temperature control of each local area on the surface of the adsorption body 2, and the heating speed of each local area on the surface of the adsorption body 2 can be precisely controlled. Therefore, for different wiring pattern designs, the overall and local heating control can be adjusted by the above-mentioned inventive concept to meet various design standards.

[0061] The heating body 1 provided by the present application can quickly heat the tobacco tar in the adsorption body 2 and ensure that the temperature distribution of the adsorption body 2 is more uniform, thereby improving the atomization efficiency of the tobacco tar. The atomizer and electronic cigarette using the heating body 1 can provide a better smoking experience. In the heating body 1 provided by the present application, the heating wire 12 is provided with a wide portion 121 and / or narrow portion 122 having a width change, so as to precisely control the heating speed of each local position of the heating wire 12, thereby providing precise heating effect for each local position on the surface of the adsorption body 2 containing the tobacco tar, and improving and enhancing the tobacco tar gasification explosion effect of each local area on the adsorption body 2.

[0062] In some embodiments, the plurality of heating wires 12 are arranged in a relatively dense manner, and in order to prevent the heat generated in this area from being too much so as to cause the temperature to be too high, several wide portions 121 can be provided to reduce the heat generated in this area as a whole, while keeping other conditions unchanged. In other embodiments, the plurality of heating wires 12 are arranged in a relatively sparse manner, and in order to prevent the heat generated in this area from being too little so as to cause the temperature to be too low, several narrow portions 122 can be provided to increase the heat generated in this area as a whole, while keeping other conditions unchanged.

[0063] In yet other embodiments, the plurality of heating wires 12 are already arranged in a relatively dense manner, but it is desired to further increase the heat generated in this area so as to further increase the temperature and the temperature rising speed of this area, and therefore several narrow portions 122 can be provided in these areas to further increase the heat generated in this area, so as to further increase the temperature and the temperature rising speed of this area. In other embodiments, the plurality of heating wires 12 are already arranged in a relatively sparse manner, but it is desired to further decrease the heat generated in this area so as to further decrease the temperature and the temperature rising speed of this area, and therefore several wide portions 121 can be provided in these areas to further decrease the heat generated in this area, so as to further decrease the temperature and the temperature rising speed of this area.

[0064] Obviously, the flexible use of the wide portions 121 and the narrow portions 122 can be adjusted to meet different design requirements to obtain the desired heating effect, for different specific embodiments and design standards.

[0065] Referring to FIG. 1, FIG. 2, FIG. 4 and FIG. 6, in some embodiments of the present application, the number of the heating wires 12 is two; referring to FIG. 3, in other embodiments of the present application, the number of the heating wires 12 is three; in yet other embodiments, the number of the heating wires 12 can be four, five or six or more; obviously, the number of the heating wires 12 can be selected according to the actual application requirements.

[0066] Referring to FIG. 1, in some embodiments of the present application, the two narrow portions 122 with the smallest width size among all the heating wires 12 are respectively located on two of the heating wires 12.

[0067] Referring to FIG. 1, in some embodiments of the present application, the two narrowest portions 122 are located on the first and second heating wires 12, respectively, and the line width of one of the narrowest portions 122 is A, and the line width of the other of the narrowest portions 122 is B, and A:B = 1:(1.1-2.5). It is worth noting that if the above ratio is too small, the resistance difference between the two narrowest portions 122 and the heat difference caused by the resistance difference will be too small, so that the heat control of each local area and the control of the temperature rising speed are not significant enough. Obviously, too small line width difference will make the regulation of the heating condition of the heating wire 12 not obvious. If the above ratio is too large, the large line width difference will result in a small resistance of the wide line. In the case of the same voltage input to each branch of the parallel circuit, the wide line will bear a large current and output the largest heat power, which will reduce the service life of the heating wire 12.

[0068] Referring to FIG. 2, in some embodiments of the present application, the two widest portions 121 are located on the third and fourth heating wires 12, respectively.

[0069] Referring to FIG. 2, in some embodiments of the present application, the two widest portions 121 are located on the third and fourth heating wires 12, respectively, and the line width of one of the widest portions 121 is C, and the line width of the other of the widest portions 121 is D, and C:D = 1:(1.1-2.5). It is worth noting that if the above ratio is too small, the resistance difference between the two narrowest portions 122 and the heat difference caused by the resistance difference will be too small, so that the heat control of each local area and the control of the temperature rising speed are not significant enough. Obviously, too small line width difference will make the regulation of the heating condition of the heating wire 12 not obvious. If the above ratio is too large, the large line width difference will result in a small resistance of the wide line. In the case of the same voltage input to each branch of the parallel circuit, the wide line will bear a large current and output the largest heat power, which will reduce the service life of the heating wire 12.

[0070] Referring to FIG. 1, in some embodiments of the present application, the same heating wire 12 has at least two narrowest portions 122, the line width of the narrowest portion 122 is E, and the line width of the narrowest portion 122 among the remaining narrowest portions 122 is F, and E:F = 1:(1.1-1.5). It is worth noting that too small line width difference will make the regulation of the heating condition of the heating body 1 not obvious, and too large line width difference will result in a power mutation when the current flows through the line width transition of the wide and narrow line portions, and repeated power-on is not conducive to maintaining the service life of the transition.

[0071] Referring to FIG. 2, in some embodiments of the present application, the same heating wire 12 has at least two wide sections 121, the widest one of which has a wire width G, the widest one of the remaining wide sections 121 has a wire width H, and G:H = (1.1-1.5):1. The ratio of the smallest diameter section of a single wire to the largest diameter section of the same wire is 1:1.1 to 1:1.5. Too small a wire width difference will not significantly regulate the heating of the circuit, while too large a wire width difference will cause power to suddenly change when the current flows through the junction of the wide and narrow sections of the wire, and repeated power-on will not be conducive to maintaining the life of the junction.

[0072] In some embodiments of the present application, in the same heating wire 12, the widest section 121 has a width J, and the narrowest section 121 has a width K, and J:K = 1:(1.1-1.5). The ratio of the smallest diameter section of a single wire to the largest diameter section of the same wire is 1:1.1 to 1:1.5. Too small a wire width difference will not significantly regulate the heating of the circuit, while too large a wire width difference will cause power to suddenly change when the current flows through the junction of the wide and narrow sections of the wire, and repeated power-on will not be conducive to maintaining the life of the junction.

[0073] Referring to FIGS. 1-4 and 6, in some embodiments of the present application, the heating wire 12 is a smooth curve, and the smooth curve includes at least one curved section 123. In other embodiments, the heating wire 12 is a straight line. In yet other embodiments, the heating wire 12 can be a combination of a curved heating wire 12 and a straight heating wire 12.

[0074] In some embodiments of the present application, the curved section 123 is at least one of a C shape, a U shape, a V shape, an L shape, or a J shape.

[0075] In some embodiments of the present application, the smooth curve includes at least two curved sections 123, and each pair of adjacent curved sections 123 smoothly transitions and forms at least one of an S shape, an M shape, a W shape, an N shape, or a Z shape.

[0076] It can be understood that designing a narrow section 122 at a sparse section of the heating wire 12 can effectively improve the heating speed and efficiency of the circuit at that section, and appropriately adjusting the width of the circuit can enable it to heat at the same time as the circuit at a dense section of the circuit, greatly improving the atomization speed of the entire heating body 1 and the temperature uniformity of the entire atomization surface.

[0077] In some cases, the wide part 121 is designed at the sparse circuit, and the narrow part 122 is designed at the dense circuit, which can effectively reduce the heat at the sparse circuit, reduce the waste of power supply power at the sparse circuit, effectively improve the heating effect of the circuit at the dense circuit, give the circuit local higher burst power, and effectively improve the atomization efficiency of the circuit.

[0078] Obviously, by scientifically designing the circuit line width distribution, the burst power of the heating circuit, the heating speed of the atomization surface, the uniformity of the temperature distribution of the atomization surface, and the heating efficiency can be effectively improved.

[0079] In some embodiments of the present application, the heating body 12 can provide a temperature field of 150-230 DEG C to ensure that the tobacco tar has a fast enough burst speed.

[0080] Referring to FIG. 1, in this specific embodiment, the contact 11 is square, the number of heating wires 12 is two, each heating wire 12 is roughly in the shape of a C, the two C-shaped heating wires 12 arch outwardly away from each other, and each heating wire 12 has only one narrow part 122. The narrow part 122 is arranged at the center of the two heating wires 12 in FIG. 1, which is to further improve the temperature burst effect of the heating core area in the case of insufficient electrode burst, so as to obtain better tobacco tar atomization effect and tobacco tar product taste.

[0081] Referring to FIG. 2, in this specific embodiment, the contact 11 is square, the number of heating wires 12 is two, each heating wire 12 is roughly in the shape of a C, the two C-shaped heating wires 12 arch outwardly away from each other, and each heating wire 12 has only one wide part 121. The wide part 121 is arranged at the center of the two heating wires 12 in FIG. 2 because when the electrode burst is too strong, it is easy to cause the problems of the paste core and the poor service life, so the above scheme is designed to reduce the burst of the heating core area of the heating body 1, so as to obtain better tobacco tar product taste and prolong the service life of the product as a whole.

[0082] Referring to FIG. 3, in this specific embodiment, the contact 11 is square, the number of the heating wires 12 is three, the two outermost heating wires 12 are roughly in the shape of C, the two C-shaped heating wires 12 arch outwardly away from each other, the middle heating wire 12 is roughly in the shape of S, and each heating wire 12 has only one wide part 121. The three heating wires 12 in FIG. 3 can solve the problem of large resistance of the resistance paste square resistance, specifically, by increasing the number of parallel heating wires 12 to reduce the overall resistance of the heating body 1, and by setting the wide part 121 at the center of the three heating wires 12 to significantly improve and reduce the explosion degree of the electrode heating core area in the case of strong electrode explosion which easily leads to poor paste core and service life, thereby obtaining better smoke product taste and prolonging the overall service life of the product.

[0083] Referring to FIG. 4, in this specific embodiment, the contact 11 is square, the number of the heating wires 12 is two, each heating wire 12 is roughly in the shape of C, and each heating wire 12 has two wide parts 121. The two wide parts 121 at the two ends of the two heating wires 12 in FIG. 4 are provided to appropriately reduce the local heat loss and supply power to the center and both ends of the heating wires 12, because the electrode explosion effect of the two end regions is weak and the heat generation is less, the above design can realize the uniformity of the surface temperature of the entire adsorption body 2, improve the electrode atomization effect on the smoke oil, and thus improve the taste of the smoke oil.

[0084] Referring to FIG. 5, it is a wiring scheme in the prior art, the contact 11 is square, the number of the heating wire 12 is only one, the heating wire 12 is roughly in the shape of S, and the line width of the heating wire 12 is equal everywhere. Obviously, the heat generation of each part of the heating wire 12 in the prior art is the same, and thus it is impossible to provide precise heat generation control and temperature rising speed control for each local region in the heating wire 12 arrangement region.

[0085] Referring to FIG. 6, in this specific embodiment, the contact 11 is circular, the number of the heating wires 12 is two, each heating wire 12 is roughly in the shape of C, the two C-shaped heating wires 12 arch outwardly away from each other, and each heating wire 12 has two wide parts 121. Compared with FIG. 2, the main difference between FIG. 6 and FIG. 2 is that the contact 11 of the electrode is changed from the square contact 11 in FIG. 2 to the circular contact 11 in FIG. 6. This design is mainly to adapt to the position and shape of the power supply contact pin of different smoking products, and the shape of the contact of the electrode has little effect on the actual heating effect.

[0086] In some embodiments of the present application, the heating wire 12 and the contact 11 are integrally formed, preferably made of resistance paste through high-temperature sintering.

[0087] In some embodiments of the present application, the heating wire 12 and the contact 11 are electrically connected via a conductive medium, which can be a wire or other conductive material or device.

[0088] The second aspect

[0089] Referring to FIG. 7, an atomizing core includes an adsorbent 2 having a porous structure capable of adsorbing tobacco tar and a heating body 1 as described above arranged in contact with the adsorbent 2.

[0090] It can be understood that the atomizing core, due to the use of the heating body 1 as described above, is beneficial to improve the burst force of the heating circuit, the heating speed of the atomizing surface, the uniformity of the temperature distribution of the atomizing surface, and the heating efficiency.

[0091] In some embodiments of the present application, the adsorbent 2 is made of ceramic or glass.

[0092] In some embodiments of the present application, the adsorbent 2 having a porous structure and made of ceramic material with SiO2 as the main material has a porosity of 50±5% and an average pore size of 30±5 μm, and has a length, width and height of 9.0*3.5*2.6 mm, in the form of a cuboid, and can be made by a flow casting lamination process or an injection process.

[0093] In some embodiments of the present application, the adsorbent 2 having a porous structure and made of ceramic material with SiO2 as the main material has a porosity of 60±5% and an average pore size of 50±5 μm, and has a length, width and height of 9.0*4.0*2.5 mm, in the form of a cuboid, and can be made by an injection process or a lamination process.

[0094] The third aspect

[0095] A manufacturing method of the atomizing core as described above includes the following steps: S1, providing an adsorbent 2 and a resistive paste for manufacturing a contact 11 and a heating wire 12; S2, applying the resistive paste to the surface of the adsorbent 2 to form a heating circuit pattern including the contact 11 and the heating wire 12; S3, high-temperature sintering the adsorbent 2 with the heating circuit pattern to obtain the atomizing core.

[0096] In some embodiments of the present application, the resistive paste as described above can be a nickel-chromium resistive paste.

[0097] In some embodiments of the present application, between the steps S1 and S2, a groove is processed on the surface of the adsorbent 2, and the groove is used to accommodate the resistive paste.

[0098] In some embodiments of the present application, the adsorbent body 2 is prepared by a tape casting lamination process or an injection process before the step S1.

[0099] In some embodiments of the present application, a method for preparing the adsorbent body 2 by a tape casting lamination process comprises: casting a ceramic tape casting slurry to obtain a first green film strip and casting a porous ceramic tape casting slurry to obtain a second green film strip; laminating the first green film strip and the second green film strip to obtain a porous ceramic green body; and performing debinding, sintering, printing electrodes and vacuum sintering on the porous ceramic green body to obtain the porous ceramic atomization core.

[0100] In some embodiments of the present application, the thickness of the first green film strip and the second green film strip is typically but not limited to 50 μm, 60 μm, 70 μm, 80 μm, 100 μm, 120 μm, 140 μm, 160 μm or 180 μm. Preferably, the lamination of the first green film strip and the second green film strip is performed respectively to obtain a first green body and a second green body, and the second green body is laminated on the first green body to obtain the ceramic green body. Preferably, the thickness of the first green body is 2 mm-5 mm. In some embodiments of the present application, the thickness of the first green body is typically but not limited to 2 mm, 3 mm, 4 mm or 5 mm. Preferably, the thickness of the second green body is 0.05 mm-1.5 mm.

[0101] In some embodiments of the present application, the thickness of the second green body is typically but not limited to 0.05 mm, 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm or 1.5 mm. Preferably, the pressure of the compaction is 25 MPa-35 MPa. In some embodiments of the present application, the pressure of the compaction is typically but not limited to 25 MPa, 27 MPa, 29 MPa, 31 MPa, 33 MPa or 35 MPa. Optionally, the time of the debinding and sintering is 15 h-30 h. In some embodiments of the present application, the time of the debinding and sintering is typically but not limited to 15 h, 20 h, 25 h or 30 h. Preferably, the temperature of the debinding and sintering is 1100℃-1400℃. In some embodiments of the present application, the temperature of the debinding and sintering is typically but not limited to 1100℃, 1200℃, 1300℃ or 1400℃. Optionally, the electrodes comprise a nickel-chromium alloy electrode. Preferably, the temperature of the vacuum sintering is 850℃-1050℃. In some embodiments of the present application, the temperature of the vacuum sintering is typically but not limited to 850℃, 900℃, 950℃ or 1050℃. Preferably, the holding time of the vacuum sintering is 10 min-30 min. In some embodiments of the present application, the holding time of the vacuum sintering is typically but not limited to 10 min, 20 min or 30 min. Preferably, the vacuum degree of the vacuum sintering is ≤10 Pa.

[0102] Fourth aspect

[0103] An electronic cigarette comprises the above-mentioned atomizing core and a power supply connected with the contact 11 of the atomizing core for supplying power to the heating body 1 of the atomizing core. It can be understood that the electronic cigarette is advantageous in improving the burst force of the heating circuit, the heating speed of the atomizing surface, the temperature distribution uniformity of the atomizing surface and the heating efficiency due to the use of the above-mentioned atomizing core.

[0104] In some embodiments of the present application, the electrode of the power supply and the contact 11 can be directly contacted or indirectly connected via a wire or other conductive medium.

[0105] In some embodiments of the present application, the material of the positive and negative electrodes of the power supply can be copper and its alloy.

[0106] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. In addition, the principle and embodiment of the present application are described by using specific examples in the specification, and the above description of the examples is only used to help understand the method and core idea of the present application, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A heating element (1) for an atomizer of an electronic cigarette, the heating element (1) comprising two contacts (11) for being energized and heating wires (12) electrically connected with the two contacts (11), characterized in that: at least one of the heating wires (12) has at least one region with a wire width different from that of the rest of the region.

2. The heat generating body (1) according to claim 1, characterized in that The heating wire (12) has at least one wide part (121) and / or narrow part (122). In the same heating wire (12), the wire width of the wide part (121) is greater than that of the rest of the heating wire (12), and the wire width of the narrow part (122) is less than that of the rest of the heating wire (12).

3. The heat generating body (1) according to claim 1 or 2, characterized in that The number of heating wires (12) is at least two.

4. The heat generating body (1) according to any one of claims 1 to 3, characterized in that Among all the heating wires (12), the two narrow parts (122) with the smallest width size are respectively located on two heating wires (12).

5. The heat generating body (1) according to any one of claims 1 to 4, characterized in that The two narrow parts (122) with the smallest width size are respectively located on a first heating wire (12) and a second heating wire (12) among the heating wires (12), wherein the wire width of one of the narrow parts (122) is A, and the wire width of the other narrow part (122) is B, and A:B = 1:(1.1-2.5).

6. The heat generating body (1) according to any one of claims 1 to 5, characterized in that Among all the heating wires (12), the two wide parts (121) with the largest width size are respectively located on two heating wires (12).

7. The heat generating body (1) according to any one of claims 1 to 6, characterized in that The two wide parts (121) with the largest width size are respectively located on a third heating wire (12) and a fourth heating wire (12) among the heating wires (12), wherein the wire width of one of the wide parts (121) is C, and the wire width of the other wide part (121) is D, and C:D = 1:(1.1-2.5).

8. The heat generating body (1) according to any one of claims 1 to 7, characterized in that The same heating wire (12) has at least two narrow parts (122), the wire width of one of the narrow parts (122) with the smallest wire width is E, and the wire width of one of the narrow parts (122) with the smallest wire width among the rest of the narrow parts (122) is F, and E:F = 1:(1.1-1.5).

9. The heat generating body (1) according to any one of claims 1 to 8, characterized in that The same heating wire (12) has at least two wide parts (121), the wire width of one of the wide parts (121) with the largest wire width is G, and the wire width of one of the wide parts (121) with the largest wire width among the rest of the wide parts (121) is H, and G:H = (1.1-1.5):

1.

10. The heat generating body (1) according to any one of claims 1 to 9, characterized in that In the same heating wire (12), the width size of one of the narrow parts (122) with the largest width size is J, and the width size of one of the wide parts (121) with the smallest width size is K, and J:K = 1:(1.1-1.5).

11. The heat generating body (1) according to any one of claims 1 to 10, characterized in that The heating wire (12) is a smooth curve and / or a straight line, and the smooth curve comprises at least one curved part (123).

12. The heat generating body (1) according to any one of claims 1 to 11, characterized by The curved part (123) is at least one of a C-shaped, U-shaped, V-shaped, L-shaped or J-shaped.

13. The heat generating body (1) according to any one of claims 1 to 12, characterized in that The smooth curve comprises at least two curved parts (123), and every two adjacent curved parts (123) are smoothly connected and form at least one of an S-shaped, M-shaped, W-shaped, N-shaped or Z-shaped.

14. The heat generating body (1) according to any one of claims 1 to 13, characterized by The heating wire (12) is integrally formed with the contact (11), and is preferably made of a resistance paste through high-temperature sintering. Alternatively, the heating wire (12) is electrically connected with the contact (11) via a conductive medium.

15. An atomizing core characterized by, The atomizing core comprises an adsorbent body (2) capable of adsorbing tobacco tar and having a porous structure, and a heating body (1) as claimed in any one of claims 1 to 14 arranged in contact with the adsorbent body (2).

16. The atomizer core of claim 15, wherein, The adsorbent body (2) is made of ceramic or glass.

17. A method of manufacturing an atomizing core as claimed in claim 15 or 16, characterized in that The manufacturing method comprises the following steps: S1, providing an adsorbent body (2) and a resistance paste for manufacturing a contact (11) and a heating wire (12); S2, applying the resistance paste to the surface of the adsorbent body (2) to form a heating circuit pattern comprising the contact (11) and the heating wire (12); S3, high-temperature sintering the adsorbent body (2) with the heating circuit pattern to obtain the atomizing core.

18. The manufacturing method according to claim 17, wherein Between the steps S1 and S2, a groove is processed on the surface of the adsorbent body (2), and the groove is used for accommodating the resistance paste.

19. The manufacturing method according to claim 17 or 18, characterized in that, Before the step S1, the adsorbent body (2) is prepared through a flow layering process or an injection process.

20. An electronic cigarette, characterised in that The electronic cigarette comprises: The atomizing core as claimed in claim 15 or 16; and A power supply connected with the contact (11) of the atomizing core and used for supplying power to the heating body (1) of the atomizing core.

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