Heating body for atomization core of electronic cigarette, atomization core and electronic cigarette

Abstract

The utility model provides a heating element for electronic cigarette atomization core, atomization core, electronic cigarette, the heating element includes two contact for electrifying and with the heating wire of two contact electric connection, the heating wire has at least one wide part and / or narrow part, the line width of the wide part is greater than the line width of the rest part of the heating wire, and the width of the narrow part is greater than the line width of the other part of the heating wire. The line width of the narrow part is smaller than the line width of the rest part of the heating wire; the atomizing core comprises the heating body, and the electronic cigarette comprises the atomizing core. The heating body provided by the utility model can quickly heat the tobacco tar in the adsorption body and control the temperature rising speed of each local area so as to ensure that the temperature distribution of the adsorption body is more uniform, thereby improving the atomization efficiency of the tobacco tar.

Description

Technical Field

[0001] The utility model relates to the field of atomization cores, and particularly relates to a heating element, an atomization core, and an electronic cigarette for an electronic cigarette atomization core. Background Art

[0002] The core component of an electronic cigarette is an atomization core, which includes a smoke oil adsorbent and a heating element. The heating element heats the smoke oil infiltrated / stored in the atomization core adsorbent to form a mist. The performance of the atomization core affects the amount of smoke, taste, and puff number during smoking. The utility model innovatively improves the temperature distribution on the heating element and the synergistic effect between multiple heating wires, so as to achieve higher atomization efficiency, more sufficient reduction of smoke, and longer suction life.

[0003] Currently, most heating circuits adopt a heating wire pattern with a continuous and equal width design. This design has the following problems: for areas where the heating wires are densely arranged, the heating wires with a continuous and equal width design will cause the heat generation to accumulate in this densely wired area, resulting in too high a local temperature on the surface of the adsorbent. While the blank area on the adsorbent without heating wires needs to wait for the heat to transfer here to gradually increase in temperature, that is, it cannot ensure the temperature balance at all positions on the surface of the adsorbent. This design relying on a single heating area to reach the temperature will lead to a lower atomization efficiency of the heating circuit for the smoke oil in the adsorbent.

[0004] Therefore, how to enable the heating element to quickly heat the smoke oil in the adsorbent and control the temperature rising speed of each local area to ensure a more uniform temperature distribution on the adsorbent, thereby improving the atomization efficiency of the smoke oil, is an urgent problem to be solved. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a heating element, an atomization core, and an electronic cigarette for an electronic cigarette atomization core, so that the heating element can quickly heat the smoke oil in the adsorbent and control the temperature rising speed of each local area to ensure a more uniform temperature distribution on the adsorbent, thereby improving the atomization efficiency of the smoke oil.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A heating element for an electronic cigarette atomization core, the heating element includes two contacts for energization and a heating wire electrically connected to the two contacts:

[0008] At least one of the heating wires has at least one section with a wire width different from that of the remaining sections.

[0009] The heating wire has at least one wide part and / or narrow part;

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

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

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

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

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

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

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

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

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

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

[0020] In some embodiments of the present utility model, the bending part is at least one of a C shape, a U shape, a V shape, an L shape or a J shape.

[0021] In some embodiments of the present utility model, the smooth curve includes at least two bending portions, and the two adjacent bending portions are smoothly transitioned to form at least one of an S shape, an M shape, a W shape, an N shape, or a Z shape.

[0022] In some embodiments of the present utility model, the heating wire and the contact are integrally formed, and preferably, are made by high-temperature sintering of resistance paste;

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

[0024] To achieve the above object, the present utility model also provides the following technical solutions:

[0025] An atomizing core, the atomizing core includes an adsorbent body having a porous structure capable of adsorbing e-liquid and the above-mentioned heating body arranged in contact with the adsorbent body.

[0026] In some embodiments of the present utility model, the material of the adsorbent body is ceramic or glass.

[0027] To achieve the above object, the present utility model also provides the following technical solutions:

[0028] An electronic cigarette, the electronic cigarette includes:

[0029] The above-mentioned atomizing core; and

[0030] A power source, connected to the contact of the atomizing core for supplying power to the heating body of the atomizing core.

[0031] Compared with the prior art, the technical solutions of the present utility model have the following beneficial effects:

[0032] The heating body provided by the present utility model can quickly heat the e-liquid in the adsorbent body and ensure a more uniform temperature distribution of the adsorbent body, thereby improving the atomization efficiency of the e-liquid; and the atomizing core and the electronic cigarette adopting this heating body can provide a better smoking taste of the e-liquid; wherein, the heating wire of the heating body provided by the present utility model is provided with a wide portion and / or a narrow portion with a width change to accurately control the starting temperature speed of each local position on the heating wire, so as to provide an accurate heating effect for each local position on the surface of the adsorbent body containing e-liquid, so as to improve and enhance the vaporization explosion effect of the e-liquid in each local area on the adsorbent body. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for description in the embodiments. Obviously, the accompanying drawings in the following description are only some implementation schemes of the present utility model. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0034] Figure 1 Structural schematic diagram of the heating element provided by the first embodiment of the present utility model;

[0035] Figure 2 Structural schematic diagram of the heating element provided by the second embodiment of the present utility model;

[0036] Figure 3 Structural schematic diagram of the heating element provided by the third embodiment of the present utility model;

[0037] Figure 4 Structural schematic diagram of the heating element provided by the fourth embodiment of the present utility model;

[0038] Figure 5 Structural schematic diagram of a heating element in the prior art;

[0039] Figure 6 Structural schematic diagram of the heating element provided by the fifth embodiment of the present utility model;

[0040] Figure 7 Structural schematic diagram of the atomizing core provided by the sixth embodiment of the present utility model.

[0041] The main reference numerals in the accompanying drawings of this application specification are described as follows:

[0042] 1 - Heating element; 11 - Contact; 12 - Heating wire; 121 - Wide part; 122 - Narrow part; 123 - Bending part;

[0043] 2 - Adsorbent. Detailed implementation manners

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0045] It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0046] Any specific numerical value (including the endpoints of a numerical range) disclosed in this document is not limited to the exact value of that numerical value, but should be understood to also cover values close to that exact value, such as all possible numerical values within ±5% of that exact value. Moreover, for the disclosed numerical ranges, between the endpoint values of the range, between the endpoint values and the specific point values within the range, and between each specific point value, any combination can be obtained to form one or more new numerical ranges, and these new numerical ranges should also be regarded as specifically disclosed in this document.

[0047] Unless otherwise specified, the terms used in this document have the same meaning as commonly understood by those skilled in the art. If a term is defined in this document and its definition is different from the common understanding in the art, then the definition in this document shall prevail.

[0048] It should be noted that the "wide part" described in the specification of the present utility model refers to the part where the wire width of the same heating wire is widened, and the "narrow part" refers to the part where the wire width of the same heating wire is narrowed; among them, the wire width of the wide part is greater than the average wire width of the heating wire where the wide part is located, and the wire width of the narrow part is less than the average wire 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 obtained by comparing 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, in some embodiments, the average wire widths between two or three or more heating wires may be different. In addition, it can be understood that the core concept of the design of the heating wire adopted in the present utility model is the variable diameter design, that is, there are local regions with different radial dimensions or wire width dimensions on the same heating wire.

[0049] The first aspect

[0050] See Figures 1 to 4 And Figure 6 , a heating element 1 for an electronic cigarette atomization core, the heating element 1 includes two contacts 11 for energization and a heating wire 12 electrically connected to the two contacts 11; at least one of the heating wires 12 has at least one region where the wire width is different from that of the remaining regions.

[0051] See Figures 1 to 4 And Figure 6 , in some embodiments of the present utility model, 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 the wire width of the remaining part of the heating wire 12, and the wire width of the narrow part 122 is less than the wire width of the remaining part of the heating wire 12.

[0052] It can be understood that, see Figure 7, the above-mentioned heating element 1 covers the surface of the adsorbent 2 of the electronic cigarette atomizing core to heat the e-liquid in the adsorbent 2, vaporize and atomize the e-liquid for the user to inhale.

[0053] Specifically, for each heating wire 12, the principle of its series connection with the circuit is the same or similar, and the magnitude of the current flowing through every position along this heating wire 12 is equal; therefore, for the covering area of this heating wire 12 on the surface of the adsorbent 2, this part of the covering area can be further divided into multiple smaller regions. Sometimes some regions are desired to be designed with a faster temperature rising speed, and sometimes with a slower temperature rising speed. Therefore, the heat generation of each of the above-mentioned covering regions can be controlled by designing the heating wire 12 to be wider or narrower in line width; it can be understood that on the same heating wire 12, the wide part 121 with a widened line width has a reduced resistance in this region because the cross-sectional area for the current to flow through has increased, thereby reducing the heat generation in this region, while the narrow part 122 with a narrowed line width has an increased resistance in this region because the cross-sectional area for the current to flow through has decreased, thereby increasing the heat generation in this region. To sum up, the present utility model controls the line width difference at each position on the same heating wire 12, so that the heating amounts of each local region in the heating region covered by the same heating wire 12 are different, thereby achieving precise temperature control for each local region on the surface of the adsorbent 2, enabling the temperature rising speed of each local region on the surface of the adsorbent 2 to be precisely regulated. Furthermore, for different wiring pattern designs, the overall and local heat generation control can be adjusted through the above-mentioned inventive concept of the utility model to meet various design criteria.

[0054] The heating element 1 provided by the present utility model can quickly heat the e-liquid in the adsorbent 2 and ensure a more uniform temperature distribution of the adsorbent 2, thereby improving the atomization efficiency of the e-liquid; and the atomizing core and the electronic cigarette adopting this heating element 1 can provide a better e-liquid inhalation taste; wherein, the heating wire 12 in the heating element 1 provided by the present utility model is provided with a wide part 121 and / or a narrow part 122 with a width change to precisely regulate the temperature rising speed of each local position on the heating wire 12, so as to provide a precise heating effect for each local position on the surface of the adsorbent 2 containing the e-liquid, thereby improving and enhancing the e-liquid vaporization explosion effect of each local region on the adsorbent 2.

[0055] In addition, in some embodiments, the multiple heating wires 12 are arranged densely. In this case, on the premise that other conditions remain unchanged, in order to prevent the heat generation in this area from being too much and causing the temperature to be too high, several wide portions 121 can be provided to reduce the heat generation at this position as a whole. In other embodiments, the multiple heating wires 12 are arranged sparsely. In this case, on the premise that other conditions remain unchanged, in order to prevent the heat generation in this area from being too little and causing the temperature to be too low, several narrow portions 122 can be provided to increase the heat generation at this position as a whole.

[0056] However, in some other embodiments, the multiple heating wires 12 are already arranged densely, but it is still desired to further increase the heat generation in this area so as to further increase the temperature and the temperature rising speed in this area. In this case, several narrow portions 122 can be provided in these areas to further increase the heat generation in this area, thereby increasing the temperature in this area and increasing the heating speed in this area. In other embodiments, the multiple heating wires 12 are already arranged sparsely, but it is still desired to further reduce the heat generation in this area so as to further decrease the temperature and the temperature rising speed in this area. In this case, several wide portions 121 can be provided in these areas to further reduce the heat generation in this area, thereby decreasing the temperature in this area and decreasing the heating speed in this area.

[0057] Obviously, for different specific embodiments and design criteria, the flexible use of the wide portions 121 and the narrow portions 122 can be adjusted according to different design requirements to obtain the desired heat generation effect.

[0058] See Figure 1 、 Figure 2 、 Figure 4 and Figure 6 , in some embodiments of the present utility model, the number of the heating wires 12 is two; see Figure 3 , in some other embodiments of the present utility model, the number of the heating wires 12 is three; in some other embodiments, the number of the heating wires 12 can also be four, five or six or more; obviously, the specific number of the heating wires 12 can be selected according to the actual application requirements.

[0059] See Figure 1 , in some embodiments of the present utility model, among all the heating wires 12, the two narrow portions 122 with the smallest width dimensions are respectively located on two of the heating wires 12.

[0060] See Figure 1, in some embodiments of the present utility model, the two narrow portions 122 with the smallest width dimensions are respectively located on the first heating wire 12 and the second heating wire 12 in the heating wire 12. The wire width of one of the narrow portions 122 is A, and the wire width of the other narrow portion 122 is B, and A:B = 1:(1.1 - 2.5). It should be noted that if the above ratio is too small, the resistance value difference between the two narrow portions 122 and the heat generation difference caused by the resistance value difference will be too small, so that the heat generation control of each local area and the control of the temperature rise speed are not significant enough. Obviously, too small a wire width difference will make the regulation of the heat generation situation of the heating wire 12 not obvious; if the above ratio is too large, too large a wire width difference will result in a smaller resistance of the wide line. In the case where the same voltage is input to each branch of the parallel circuit, the wide line will withstand a larger current and output the maximum heat generation power, which will reduce the service life of the heating wire 12.

[0061] See Figure 2 , in some embodiments of the present utility model, among all the heating wires 12, the two wide portions 121 with the largest width dimensions are respectively located on two of the heating wires 12.

[0062] See Figure 2 , in some embodiments of the present utility model, the two wide portions 121 with the largest width dimensions are respectively located on the third heating wire 12 and the fourth heating wire 12 in the heating wire 12. The wire width of one of the wide portions 121 is C, and the wire width of the other wide portion 121 is D, and C:D = 1:(1.1 - 2.5). It should be noted that if the above ratio is too small, the resistance value difference between the two narrow portions 122 and the heat generation difference caused by the resistance value difference will be too small, so that the heat generation control of each local area and the control of the temperature rise speed are not significant enough. Obviously, too small a wire width difference will make the regulation of the heat generation situation of the heating wire 12 not obvious; if the above ratio is too large, too large a wire width difference will result in a smaller resistance of the wide line. In the case where the same voltage is input to each branch of the parallel circuit, the wide line will withstand a larger current and output the maximum heat generation power, which will reduce the service life of the heating wire 12.

[0063] See Figure 1 , in some embodiments of the present utility model, the same heating wire 12 has at least two narrow portions 122. The wire width of the narrow portion 122 with the smallest wire width is E, and the wire width of the narrow portion 122 with the smallest wire width among the remaining narrow portions 122 is F, and E:F = 1:(1.1 - 1.5). It should be noted that too small a wire width difference will make the regulation of the heat generation situation of the heating element 1 not obvious, and too large a wire width difference will cause a power mutation to easily occur when the current flows through the junction of the wide and narrow wire portions of the circuit, and repeated energization is not conducive to maintaining the life of the junction.

[0064] See Figure 2 In some embodiments of the present invention, on the same heating wire 12, there are at least two wide portions 121. The wire width of the widest wide portion 121 is G, and the wire width of the widest one among the remaining wide portions 121 is H, and G:H=(1.1-1.5):1. The ratio of the smallest-diameter wire portion to the largest-diameter wire portion on the same circuit is 1:1.1 to 1:1.5. Too small a wire-width difference will make the regulation of the circuit heating situation not obvious, while too large a wire-width difference will cause power mutation when the current flows through the junction of the wide and narrow wire portions of the circuit, and repeated energization is not conducive to maintaining the life of the junction.

[0065] In some embodiments of the present invention, on the same heating wire 12, the width dimension of the widest narrow portion 122 is J, and the width dimension of the narrowest wide portion 121 is K, and J:K = 1:(1.1-1.5). The ratio of the smallest-diameter wire portion to the largest-diameter wire portion on the same circuit is 1:1.1 to 1:1.5. Too small a wire-width difference will make the regulation of the circuit heating situation not obvious, while too large a wire-width difference will cause power mutation when the current flows through the junction of the wide and narrow wire portions of the circuit, and repeated energization is not conducive to maintaining the life of the junction.

[0066] See Figures 1 to 4 and Figure 6 In some embodiments of the present invention, the heating wire 12 is a smooth curve, and the smooth curve includes at least one bending portion 123; in other embodiments, the heating wire 12 is a straight line; in still other embodiments, it may also be a combination formed by a curved heating wire 12 and a straight heating wire 12.

[0067] In some embodiments of the present invention, the bending portion 123 is at least one of a C shape, a U shape, a V shape, an L shape or a J shape.

[0068] In some embodiments of the present invention, the smooth curve includes at least two bending portions 123, and the two adjacent bending portions 123 are smoothly transitioned to form at least one of an S shape, an M shape, a W shape, an N shape or a Z shape.

[0069] It can be understood that designing the narrow portion 122 at the sparse part of the heating wire 12 circuit can effectively improve the temperature rising speed and heating efficiency at that part of the circuit, appropriately adjust the wire width so that it can heat up simultaneously with the circuit at the dense part of the circuit, and greatly improve the atomization speed of the entire heating element 1 and the temperature uniformity of the entire atomization surface.

[0070] In other cases, designing a wide part 121 at a sparse circuit area and a narrow part 122 at a dense circuit area can effectively reduce the heat generation at the sparse circuit area, reduce the waste of power supply power at that place, and can also effectively improve the heat generation effect of the circuit at the dense circuit area, giving a higher explosive power to the local part of the circuit and effectively improving the atomization efficiency of the circuit.

[0071] Obviously, by scientifically designing the line width distribution of the circuit, the explosive power, the heat generation speed of the atomization surface, the uniformity of the temperature distribution of the atomization surface, and the heat generation efficiency of the heat-generating circuit can be effectively improved.

[0072] In some embodiments of the present utility model, the heating element 12 can provide a temperature field of 150-230 °C to ensure that the e-liquid has a sufficiently rapid explosion speed.

[0073] See Figure 1 , in this specific embodiment, the contact 11 is square, the number of heating wires 12 is two, the shape of each heating wire 12 is roughly C-shaped, the two C-shaped heating wires 12 arch outward away from each other, and there is only one narrow part 122 on each heating wire 12. Figure 1 The narrow part 122 is arranged at the central position of the two heating wires 12 to further improve the temperature explosion effect of the heat generation core area in the case of insufficient electrode explosion, so as to obtain a better e-liquid atomization effect and e-liquid smoking taste.

[0074] See Figure 2 , in this specific embodiment, the contact 11 is square, the number of heating wires 12 is two, the shape of each heating wire 12 is roughly C-shaped, the two C-shaped heating wires 12 arch outward away from each other, and there is only one wide part 121 on each heating wire 12. Figure 2 The wide part 121 is arranged at the central position of the two heating wires 12 because: when the electrode explosion is too strong, it is easy to cause problems such as coil burning and poor lifespan. Therefore, it is necessary to design the above-mentioned scheme to reduce the explosion of the heat generation core area of the heating element 1, so as to obtain a better e-liquid smoking taste and extend the overall lifespan of the product.

[0075] See Figure 3 , in this specific embodiment, the contact 11 is square, the number of heating wires 12 is three, the shapes of the two outermost heating wires 12 are roughly C-shaped, the two C-shaped heating wires 12 arch outward away from each other, the heating wire 12 at the middle position is roughly S-shaped, and there is only one wide part 121 on each heating wire 12. Figure 3The three heating wires 12 can solve the problem of relatively large sheet resistance of the resistive paste. Specifically, by increasing the number of parallel heating wires 12, the resistance of the entire heating element 1 is reduced; and by setting the wide part 121 at the central position of the three heating wires 12, when the electrode explodes too strongly, which is likely to cause paste core and poor lifespan, the explosion degree in the core area of the electrode heating can be significantly improved and reduced, thereby obtaining a better smoking taste of the e-liquid and extending the overall lifespan of the product.

[0076] See Figure 4 , in this specific embodiment, the contact 11 is square, the number of heating wires 12 is two, the shape of each heating wire 12 is roughly C-shaped, the two C-shaped heating wires 12 arch outward away from each other, and each heating wire 12 has two wide parts 121. Figure 4 Two wide parts 121 are respectively arranged at both ends of the two heating wires 12 to appropriately reduce the local heat loss and supply power to the central position and both ends of the heating wire 12. Since the electrode explosion effect in the area of both ends is weak and the heat generation is less, the above design can achieve the uniformity of the surface temperature of the entire adsorbent 2, improve the atomization effect of the electrode on the e-liquid, and thus enhance the smoking taste of the e-liquid.

[0077] See Figure 5 , this is a wiring scheme in the prior art. Its contact 11 is square, the number of heating wires 12 is only one, the shape of this heating wire 12 is roughly S-shaped, and the wire width is equal everywhere on this heating wire 12; obviously, the heat generation amount at each position on this heating wire 12 in the prior art is the same, so it is impossible to provide precise control of the heat generation amount and the starting temperature speed for each local area in the area where this heating wire 12 is arranged.

[0078] See Figure 6 , in this specific embodiment, the contact 11 is circular, the number of heating wires 12 is two, the shape of each heating wire 12 is roughly C-shaped, the two C-shaped heating wires 12 arch outward away from each other, and each heating wire 12 has two wide parts 121. Figure 6 Compared with Figure 2 , the main difference is the contact 11 of the electrode. The square contact 11 in Figure 2 is replaced with the circular contact 11 in Figure 6 . This design is mainly to adapt to the position and shape of the power contact pins of different smoking device products. The shape of the contact of the electrode has little influence on the actual heating effect.

[0079] In some embodiments of the present invention, the heating wire 12 and the contact 11 are integrally formed, preferably made of resistive paste through high-temperature sintering.

[0080] In some embodiments of the present utility model, the heating wire 12 is electrically connected to the contact 11 via a conductive medium, specifically, it can be connected by a wire or other conductive materials or devices.

[0081] In a second aspect

[0082] Referring to Figure 7 , an atomizing core includes an adsorbent 2 having a porous structure capable of adsorbing e-liquid and the above-mentioned heating element 1 arranged in contact with the adsorbent 2.

[0083] It can be understood that since the above-mentioned heating element 1 is used in this atomizing core, it is beneficial to improve the explosive power of the heating circuit, the heating speed of the atomizing surface, the uniformity of the temperature distribution on the atomizing surface, and the heating efficiency.

[0084] In some embodiments of the present utility model, the material of the adsorbent 2 is ceramic or glass.

[0085] In some embodiments of the present utility model, the adsorbent 2 made of ceramic material with a porous structure and mainly composed of SiO2 has a porosity of 50±5% and an average pore diameter of 30±5μm; its length, width and height are 9.0*3.5*2.6mm, in the shape of a cuboid, and can be obtained by a tape casting and lamination process or an injection process.

[0086] In some embodiments of the present utility model, the adsorbent 2 made of ceramic material with a porous structure and mainly composed of SiO2 has a porosity of 60±5% and an average pore diameter of 50±5μm; its length, width and height are 9.0*4.0*2.5mm, in the shape of a cuboid, and can be obtained by an injection process or a lamination process.

[0087] In a third aspect

[0088] A manufacturing method of the above-mentioned atomizing core includes the following steps: S1, providing an adsorbent 2 and a resistance paste for manufacturing the contact 11 and the heating wire 12; S2, applying the resistance paste to the surface of the adsorbent 2 to form a heating circuit pattern including the contact 11 and the heating wire 12; S3, performing high-temperature sintering on the adsorbent 2 with the heating circuit pattern to obtain the atomizing core.

[0089] In some embodiments of the present utility model, the above-mentioned resistance paste can specifically be a nickel-chromium resistance paste.

[0090] In some embodiments of the present utility model, between steps S1 and S2, grooves are machined on the surface of the adsorbent 2, and the grooves are used to accommodate the resistance paste.

[0091] In some embodiments of the present utility model, before the step S1, the adsorbent 2 is prepared by a casting lamination process or an injection process.

[0092] In some embodiments of the present utility model, a method for manufacturing the adsorbent 2 by a casting lamination process is as follows: The ceramic casting slurry and the porous ceramic casting slurry are respectively cast to obtain a first green film strip and a second green film strip. After laminating the first green film strip and the second green film strip, a porous ceramic green body is obtained. The porous ceramic green body is degreased, sintered, printed with electrodes, and then vacuum sintered to obtain the porous ceramic atomizing core.

[0093] In some embodiments of the present utility model, the thicknesses of the first green film strip and the second green film strip are typically but not limited to 50μm, 60μm, 70μm, 80μm, 100μm, 120μm, 140μm, 160μm or 180μm. Preferably, the first green film strip and the second green film strip are laminated separately to obtain a first green body and a second green body, and then the second green body is laminated on the first green body and compacted to obtain the ceramic green body. Preferably, the thickness of the first green body is 2mm - 5mm. In some embodiments of the present utility model, the thickness of the first green body is typically but not limited to 2mm, 3mm, 4mm or 5mm. Preferably, the thickness of the second green body is 0.05mm - 1.5mm.

[0094] In some embodiments of the present utility model, the thickness of the second green body is typically but not limited to 0.05mm, 0.1mm, 0.3mm, 0.5mm, 0.7mm, 0.9mm, 1.1mm, 1.3mm or 1.5mm. Preferably, the compaction pressure is 25MPa - 35MPa. In some embodiments of the present utility model, the compaction pressure is typically but not limited to 25MPa, 27MPa, 29MPa, 31MPa, 33MPa or 35MPa. Optionally, the degreasing and sintering time is 15h - 30h. In some embodiments of the present utility model, the degreasing and sintering time is typically but not limited to 15h, 20h, 25h or 30h. Preferably, the degreasing and sintering temperature is 1100℃ - 1400℃. In some embodiments of the present utility model, the degreasing and sintering temperature is typically but not limited to 1100℃, 1200℃, 1300℃ or 1400℃. Optionally, the electrode includes a nickel-chromium alloy electrode. Preferably, the vacuum sintering temperature is 850℃ - 1050℃. In some embodiments of the present utility model, the vacuum sintering temperature is typically but not limited to 850℃, 900℃, 950℃ or 1050℃. Preferably, the holding time of the vacuum sintering is 10min - 30min. In some embodiments of the present utility model, the holding time of the vacuum sintering is typically but not limited to 10min, 20min or 30min. Preferably, the vacuum degree of the vacuum sintering is ≤10Pa.

[0095] Fourth aspect

[0096] An electronic cigarette, comprising: the above-mentioned atomization core; and a power source connected to the contact 11 of the atomization core for supplying power to the heating element 1 of the atomization core. It can be understood that since the above-mentioned atomization core is used in this electronic cigarette, it is beneficial to improve the explosive force of the heating circuit, the heating speed of the atomization surface, the uniformity of the temperature distribution on the atomization surface, and the heating efficiency.

[0097] In some embodiments of the present invention, the electrode of the power source and the contact 11 may be in direct contact, or the electrode of the power source may be indirectly connected via a wire or other conductive medium.

[0098] In some embodiments of the present invention, the materials of the positive and negative electrodes of the power source may be copper and its alloys.

[0099] As described above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. In addition, specific examples are used in the specification to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention, and the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A heating element (1) for an e-cigarette atomizing core, the heating element (1) comprising two contacts (11) for energization and a heating wire (12) electrically connected to 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 remaining regions.

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

3. The heating element (1) according to claim 2, characterized in that, The number of the heating wires (12) is at least two.

4. The heating element (1) according to claim 3, characterized in that, Among all the heating wires (12), the two narrow portions (122) with the smallest width dimensions are respectively located on two of the heating wires (12).

5. The heating element (1) according to claim 4, characterized in that, The two narrow portions (122) with the smallest width dimensions are respectively located on the first heating wire (12) and the second heating wire (12) of the heating wires (12). The wire width of one of the narrow portions (122) is A, and the wire width of the other narrow portion (122) is B, and A:B = 1:(1.1 - 2.5).

6. The heating element (1) according to claim 3, characterized in that, Among all the heating wires (12), the two wide portions (121) with the largest width dimensions are respectively located on two of the heating wires (12).

7. The heating element (1) according to claim 6, characterized in that, The two wide portions (121) with the largest width dimensions are respectively located on the third heating wire (12) and the fourth heating wire (12) of the heating wires (12). The wire width of one of the wide portions (121) is C, and the wire width of the other wide portion (121) is D, and C:D = 1:(1.1 - 2.5).

8. The heating element (1) according to claim 3, characterized in that, The same heating wire (12) has at least two narrow portions (122). The wire width of the narrow portion (122) with the smallest wire width among them is E, and the wire width of the narrow portion (122) with the smallest wire width among the remaining narrow portions (122) is F, and E:F = 1:(1.1 - 1.5).

9. The heating element (1) according to claim 3, characterized in that, The same heating wire (12) has at least two wide portions (121). The wire width of the wide portion (121) with the largest wire width among them is G, and the wire width of the wide portion (121) with the largest wire width among the remaining wide portions (121) is H, and G:H = (1.1 - 1.5):

1.

10. The heating element (1) according to claim 3, characterized in that, In the same heating wire (12), the width dimension of the narrow portion (122) with the largest width dimension is J, and the width dimension of the wide portion (121) with the smallest width dimension is K, and J:K = 1:(1.1 - 1.5).

11. The heating element (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 includes at least one bending portion (123).

12. The heating element (1) according to claim 11, characterized in that, The bending portion (123) is at least one of a C shape, a U shape, a V shape, an L shape or a J shape.

13. The heating element (1) according to claim 11, characterized in that, The smooth curve includes at least two bending portions (123), and the two adjacent bending portions (123) are smoothly transitioned and form at least one of an S shape, an M shape, a W shape, an N shape or a Z shape.

14. The heating element (1) according to any one of claims 1 to 10, characterized in that, The heating wire (12) and the contact (11) are integrally formed; Alternatively, the heating wire (12) and the contact (11) are electrically connected via a conductive medium.

15. The heating element (1) according to claim 14, characterized in that, The heating wire (12) and the contact (11) are made of a resistive paste by high-temperature sintering.

16. An atomization core, characterized in that, The atomization core includes an adsorbent (2) having a porous structure capable of adsorbing e-liquid and a heating element (1) as described in any one of claims 1 to 15, which is in contact with the adsorbent (2).

17. The atomization core according to claim 16, characterized in that, The material of the adsorbent (2) is ceramic or glass.

18. An electronic cigarette, characterized in that, The electronic cigarette includes: The atomization core as described in claim 16 or 17; and A power source, connected to the contact (11) of the atomization core, for supplying power to the heating element (1) of the atomization core.

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