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

Abstract

The utility model provides a heating element used for an electronic cigarette atomization core, an atomization core and an electronic cigarette, the heating element comprises two contacts used for electrification and at least three heating wires electrically connected with the two contacts, comprising two outer side heating wires located on the outermost side and at least one middle heating wire located between the two outer side heating wires. The resistance of at least one middle heating wire is larger than or equal to the resistance of each outer side heating wire. The atomizing core comprises the heating body, and the electronic cigarette comprises the atomizing core. According to the heating body used for the electronic cigarette atomization core, the atomization core and the electronic cigarette, the heating effect of the heating body can be more uniform, so that tobacco soot carbon deposition is reduced, the service life of a product is prolonged, and the atomization speed can be increased under the condition of low power so as to improve the aroma outbreak effect of 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 mist. The performance of the atomization core affects the amount of smoke, taste and number of puffs during smoking. Most of the heating wires in the currently used heating elements are single-line longitudinally long heating wires, with two contacts at both ends for contacting the power supply to conduct electricity, and the single heating wire in the middle can be bent multiple times. The current heating wire design has the following disadvantages: 1. The single-line longitudinal length cannot provide a large enough heating area, resulting in uneven heat generation, problems such as slow smoke oil climbing, insufficient supply, and unstable sweetness and aroma during suction in some areas; 2. The single-line resistance is high, and if bent multiple times, it will cause slow heating, thus affecting the atomization effect of the smoke oil and reducing the smoking taste; 3. The heating wire designed with a single line is prone to smoke scale and carbon deposition after long-term operation, has a burnt smell during suction, and is likely to shorten the service life of the atomization core.

[0003] Therefore, how to make the heating effect of the heating element more uniform, how to improve the atomization speed under low-power conditions to enhance the aroma burst effect of the smoke oil, and how to reduce smoke scale and carbon deposition to improve the service life of the product are urgent problems to be solved. Summary of the Utility Model

[0004] 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 as to make the heating effect of the heating element more uniform, thereby reducing smoke scale and carbon deposition to improve the service life of the product, and being able to improve the atomization speed under low-power conditions to enhance the aroma burst effect of the smoke oil.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A heating element for an electronic cigarette atomization core, the heating element includes two contacts for conducting electricity and a heating wire electrically connected to the two contacts:

[0007] The number of the heating wires is at least three, including two outer heating wires located on the outermost side and at least one middle heating wire located between the two outer heating wires;

[0008] Wherein, the resistance of at least one of the middle heating wires is greater than or equal to the resistance of each of the outer heating wires.

[0009] In some embodiments of the utility model, the resistivity of the material of the middle heating wire is greater than the resistivity of the material of the outer heating wire;

[0010] And / or, the volume of the middle heating wire is greater than the volume of the outer heating wire.

[0011] In some embodiments of the present utility model, the wire length of the middle heating wire is greater than the wire length of the outer heating wire;

[0012] Or, the wire width of the middle heating wire is less than the wire width of the outer heating wire;

[0013] Or, the thickness of the middle heating wire is less than the thickness of the outer heating wire.

[0014] In some embodiments of the present utility model, the heating wire and the contact are integrally formed, preferably made by high-temperature sintering of resistance paste;

[0015] Or, the heating wire and the contact are electrically connected via a conductive medium.

[0016] In some embodiments of the present utility model, at least one of the outer heating wire and the middle heating wire is a smooth curve, and the smooth curve includes at least one bending portion.

[0017] In some embodiments of the present utility model, the smooth curve includes a plurality of the bending portions, and the 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;

[0018] And / or, the smooth curve includes a plurality of the bending portions, and the bending portion is at least one of a C shape, a U shape, a V shape, an L shape, or a J shape.

[0019] In some embodiments of the present utility model, the two outer heating wires include a first outer heating wire and a second outer heating wire;

[0020] The resistance of the first outer heating wire is less than the resistance of the second outer heating wire.

[0021] In some embodiments of the present utility model, the arched portion of the bending portion of the middle heating wire is configured to be close to the second outer heating wire.

[0022] In some embodiments of the present utility model, the number of the middle heating wires is one;

[0023] The shape and area of the region formed by enclosing one outer heating wire and this middle heating wire are the same as the shape and area of the region formed by enclosing the other outer heating wire and this middle heating wire.

[0024] In some embodiments of the present utility model, the number of the middle heating wires is one;

[0025] The shapes of the two outer heating wires and the middle heating wire are different.

[0026] In some embodiments of the present utility model, the two outer heating wires are arched outward away from the middle heating wire.

[0027] In some embodiments of the present utility model, the number of bending portions of at least one single middle heating wire is more than the number of bending portions of at least one single outer heating wire.

[0028] In some embodiments of the present utility model, the two outer heating wires are straight lines, and at least one of the middle heating wires is a smooth curve.

[0029] In some embodiments of the present utility model, both the outer heating wire and the middle heating wire are straight lines.

[0030] In some embodiments of the present utility model, the contact is square, and its width dimension is greater than or equal to the wire width of the heating wire;

[0031] Or, the contact is circular, and its radial dimension is greater than or equal to the wire width of the heating wire.

[0032] To achieve the above object, the present utility model also provides the following technical solutions:

[0033] An atomizing core, the atomizing core includes an adsorbent capable of adsorbing e-liquid and having a porous structure at least partially, and the above-mentioned heating element in contact with the adsorbent.

[0034] In some embodiments of the present utility model, the material of the adsorbent is ceramic or glass.

[0035] To achieve the above object, the present utility model also provides the following technical solutions:

[0036] A manufacturing method of the above atomizing core, the manufacturing method includes the following steps:

[0037] S1, providing an adsorbent and a resist paste for manufacturing contacts and heating wires;

[0038] S2, applying the resist paste to the surface of the adsorbent to form a heating circuit pattern including the contacts and heating wires;

[0039] S3, performing high-temperature sintering on the adsorbent with the heating circuit pattern thereon to obtain the atomizing core.

[0040] In some embodiments of the present utility model, between steps S1 and S2, grooves are processed on the surface of the adsorbent, and the grooves are used to accommodate the resist paste;

[0041] And / or, between the steps S1 and S2, the adsorbent is pre-sintered.

[0042] To achieve the above object, the present invention also provides the following technical solutions:

[0043] An electronic cigarette, which includes:

[0044] The above-mentioned atomizing core; and

[0045] A power source, connected to the contacts of the atomizing core, for supplying power to the heating element of the atomizing core.

[0046] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0047] The atomizing core and the electronic cigarette provided by the present invention can make the heating effect of the heating element more uniform, thereby reducing soot and carbon deposition to improve the service life of the product, and can improve the atomization speed under low-power conditions to enhance the aroma burst effect of the e-liquid; the specific design adopted is to design at least three heating wires to improve the uniform heating effect of the e-liquid, reduce the amount of soot and carbon deposition, thereby extending the service life of the product, and by making the resistance of the outer heating wires less than or equal to the resistance of the middle heating wires, the heat generation of the outer heating wires is greater, so that the e-liquid in contact with the outer heating wires can be heated and quickly evaporated and vaporized in a shorter time, thereby providing a better aroma burst experience of the e-liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0049] Figure 1 It is a schematic structural diagram of the heating element provided by the first embodiment of the present invention;

[0050] Figure 2 It is a schematic structural diagram of the heating element provided by the second embodiment of the present invention;

[0051] Figure 3 It is a schematic structural diagram of the heating element provided by the third embodiment of the present invention;

[0052] Figure 4 It is a schematic structural diagram of the heating element provided by the fourth embodiment of the present invention;

[0053] Figure 5 It is a schematic structural diagram of the heating element provided by the fifth embodiment of the present invention;

[0054] Figure 6 The structural schematic diagram of the heating element provided for the sixth embodiment of the present utility model;

[0055] Figure 7 The structural schematic diagram of a single-wire heating element in the prior art;

[0056] Figure 8 The structural schematic diagram of the atomization core provided for the seventh embodiment of the present utility model.

[0057] The main reference numerals in the attached drawings of the specification of this application are described as follows:

[0058] 1 - Heating element; 11 - Contact point; 12 - Heating wire; 121 - Outer heating wire; 1211 - First outer heating wire; 1212 - Second outer heating wire; 122 - Intermediate heating wire; 123 - Bending portion;

[0059] 2 - Atomization core;

[0060] 3 - Adsorbent. Specific embodiments

[0061] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0062] It should be understood that the specific embodiments described herein are only for explaining and understanding the present utility model, and are not used to limit the present utility model.

[0063] Any specific value (including the endpoints of the numerical range) disclosed herein is not limited to the exact value of that numerical value, but should be understood to also cover values close to that exact value, for example, all possible numerical values within ±5% of that exact value. And for the disclosed numerical range, between the endpoint values of the range, between the endpoint value and the specific point value within the range, and between each specific point value, any combination can be obtained to get one or more new numerical ranges, and these new numerical ranges should also be regarded as specifically disclosed herein.

[0064] Unless otherwise specified, the terms used herein have the same meaning as those generally understood by those skilled in the art. If a term is defined herein and its definition is different from the general understanding in the art, then the definition herein shall prevail.

[0065] First aspect

[0066] See Figures 1 to 6, a heating element 1, comprising two contacts 11 for conducting electricity and a heating wire 12 electrically connected to the two contacts 11; the number of the heating wires 12 is at least three, including two outer heating wires 121 located on the outermost sides and at least one intermediate heating wire 122 located between the two outer heating wires 121; wherein, the resistance of at least one of the intermediate heating wires 122 is greater than or equal to that of each of the outer heating wires 121.

[0067] Specifically, the heating element 1 designed by the present utility model has at least three heating wires 12. From Figures 1 to 6 it can be seen that it can provide a larger heating area on the surface of the adsorbent 3 to provide a more uniform and sufficient heating effect, solving the problems in the prior art that "due to only one or two heating wires 12, the heating area is small, resulting in a slower temperature rise rate of some e-liquid, insufficient supply of e-liquid vapor, and thus affecting the e-liquid atomization effect and reducing the smoking taste", and also solving the problems in the prior art that "due to only one or two heating wires 12, it is easy to have soot and carbon deposition after long-term use, resulting in a burnt taste during smoking, poor smoking taste, and shortening the service life of the atomization core".

[0068] It can be understood that the present utility model designs the heating wires 11 in the heating element 1 to be at least three, and makes the resistance of the intermediate heating wire 122 in the middle position greater than or equal to the resistance of the outer heating wires 121 on both sides, so that the surface temperature distribution of the adsorbent 3 is more uniform, the atomization speed is faster under low-power working conditions, a better e-liquid aroma burst effect is obtained, and the generation of soot and carbon deposition is reduced, improving the service life of the atomization core and the smoking taste quality at the same time; specifically, the two outer heating wires 121 enclose the middle position. At this time, if the resistance value of the intermediate heating wire 122 is set to be smaller, the current of the intermediate heating wire 122 will be larger and the heat generation will be greater. Coupled with the heat transfer from the two outer heating wires 121 on both sides, it will cause excessive heat accumulation and rapid temperature rise on the surface of the adsorbent 2 in the middle position, which will lead to soot and carbon deposition, weakening the service life of the heating element 1 and the adsorbent 3 and also affecting the smoking taste. Therefore, it is necessary to set the resistance value of the intermediate heating wire 122 to be greater than or equal to the resistance value of the outer heating wires 121 on both sides to ensure that the surface temperature of the adsorbent 3 in the middle position can rise relatively slowly.

[0069] See Figure 7 , Figure 7Shows an atomizing core 2 provided by the prior art, which includes a heating element 1 disposed on the surface of the adsorbent 3. It can be seen that it only has one heating wire. Compared with the design of at least three heating wires provided by the present invention, obviously, the area of the heating region located on the surface of the adsorbent 3 that can be covered by a single heating wire in the prior art is smaller and more limited. The design of at least three heating wires provided by the present invention can significantly increase the heating area located on the surface of the adsorbent 3, so that the e-liquid is heated more evenly and sufficiently, thereby improving the taste of smoking.

[0070] In some embodiments of the present invention, the number of the middle heating wires 122 can also be any one number of two, three, four, five or more.

[0071] In some embodiments of the present invention, the resistance value of the middle heating wire 122 can be set to be greater than the resistance values of the outer heating wires 121 on both sides, so that the heat generation amount and heat generation power of the middle heating wire 122 are less than the heat generation amount and heat generation power of the outer heating wires 121, to ensure that the surface temperature of the adsorbent 3 at the middle position does not rise sharply, making the temperature distribution more uniform, thereby extending the service life of the product and making the explosion effect of the e-liquid aroma better, improving the smoking taste.

[0072] The heating effect of the heating element provided by the present invention is more uniform, thereby reducing soot and carbon deposition to extend the service life of the product, and can improve the atomization speed under low-power conditions to enhance the explosion effect of the e-liquid aroma; the specific design scheme adopted is to design at least three heating wires 12 to improve the uniform heating effect of the e-liquid, so as to reduce the amount of soot and carbon deposition, thereby extending the service life of the product, and by making the resistance of the outer heating wire 121 less than or equal to the resistance of the middle heating wire 122, the heat generation amount of the outer heating wire 121 is greater, so that the e-liquid in contact with the outer heating wire 121 can be heated and quickly evaporated and gasified in a shorter time, thereby providing a better explosion experience of the e-liquid aroma.

[0073] In some embodiments of the present invention, the resistivity of the material of the middle heating wire 122 is greater than the resistivity of the two outer heating wires 121. In other words, the heating wire 122 can be made of a material with different resistivity to make each heating wire 122 have the desired resistance.

[0074] See Figures 1 to 4 , in some embodiments of the present invention, the volume of the middle heating wire 122 is greater than the volume of the outer heating wire 121. It can be understood that when the materials of the heating wires 12 are the same, the larger the volume of the heating wire 12, the greater its resistance value. When the voltage at both ends is the same, the current flowing through the heating wire 12 is smaller, and thus the heating wire 12 with a larger volume generates less heat.

[0075] SeeFigures 1 to 4 In some embodiments of the present utility model, the wire length of the middle heating wire 122 is greater than that of the two outer heating wires 121. It can be understood that, when the materials, wire widths, and thicknesses of the heating wires 12 are the same, the longer the wire length of the heating wire 12, the greater its resistance value. When the voltage at both ends is the same, the current flowing through the heating wire 12 is smaller, and thus the heating value of the heating wire 12 with a longer wire length is smaller.

[0076] See Figures 1 to 6 In some embodiments of the present utility model, the wire width of the middle heating wire 122 is smaller than that of the two outer heating wires 121. It should be noted that, when the materials, wire lengths, and thicknesses of the heating wires 12 are the same, the smaller the wire width of the heating wire 12, the greater its resistance value. When the voltage at both ends is the same, the current flowing through the heating wire 12 is smaller, and thus the heating value of the heating wire 12 with a narrower wire width is smaller.

[0077] See Figures 1 to 6 In some embodiments of the present utility model, the thickness of the middle heating wire 122 is smaller than that of the outer heating wire 121. It should be noted that, when the materials, wire lengths, and wire widths of the heating wires 12 are the same, the smaller the thickness of the heating wire 12, the greater its resistance value. When the voltage at both ends is the same, the current flowing through the heating wire 12 is smaller, and thus the heating value of the heating wire 12 with a smaller thickness is smaller.

[0078] Certainly, in some other embodiments of the present utility model, the wire width of the middle heating wire 122 can be slightly greater than that of the two outer heating wires 121 on both sides, but it is required that the wire length of the middle heating wire 122 has a sufficient length so that the overall resistance value of the middle heating wire 122 can be greater than that of the outer heating wire 121, thereby ensuring that the current of the middle heating wire 122 is smaller when the voltage at both ends of each heating wire 12 is the same.

[0079] In some embodiments of the present utility model, the heating wire 12 and the contact 11 are integrally formed, and preferably, they are made by high-temperature sintering of resistance paste.

[0080] In some embodiments of the present utility model, the heating wire 12 and the contact 11 are electrically connected via a conductive medium, and this conductive medium can specifically be a wire, a conductor, or other materials or devices with conductive capabilities.

[0081] It can be understood that, see Figures 1 to 6, the size of the contact 11 is larger than the line width of the heating wire 11, aiming to reduce the resistance of the contact 11 and minimize the heat generation or excessive heat generation of the contact 11. Since the contact 11 is connected to the positive and negative poles of the power supply, if the contact 11 generates too much heat and the temperature is too high, it will damage the positive and negative poles of the power supply connected thereto and thus harm the power supply. In addition, making the contact 11 larger can also facilitate improving the ease of contact between the positive and negative poles of the power supply and the contact, increasing the contact probability between the contact 11 and the positive and negative poles of the power supply, and avoiding the problem of open circuit during product use.

[0082] Among them, referring to Figures 1 to 5 , the shape of the contact 11 can be square, and in some embodiments, it can also be a square with rounded corners; referring to Figure 6 , the shape of the contact 11 can also be any one of a circle, a semicircle, and a crescent shape.

[0083] Referring to Figures 1 to 4 , in some embodiments of the present invention, at least one of the outer heating wire 121 and the middle heating wire 122 is a smooth curve, and the smooth curve includes at least one bending portion 123. Among them, as Figures 1 to 3 , these three cases are that both the outer heating wire 121 and the middle heating wire 122 are smooth curves; while Figure 4 is the case where only the middle heating wire 122 is a smooth curve and the two outer heating wires 121 are straight lines.

[0084] Referring to Figures 1 to 4 and Figure 6 , in some embodiments of the present invention, the smooth curve includes a plurality of the bending portions 123, and the 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.

[0085] Referring to Figures 1 to 4 , in some embodiments of the present invention, the smooth curve includes a plurality of the bending portions 123, and the bending portions 123 are at least one of a C shape, a U shape, a V shape, an L shape, or a J shape.

[0086] It can be understood that the specific shape of the above-mentioned bending portion 123 and the specific shape of the heating wire 12 can be selected and designed according to the actual design criteria and usage requirements.

[0087] In some embodiments of the present invention, for the adsorbent 3 with a relatively large planar size, in order to solve the problem of narrow coverage of the heating wire 12, a plurality of bending portions 123 can be provided to improve and uniform the heating effect and enhance the smoking taste.

[0088] Referring to Figures 1 to 6, in some embodiments of the present utility model, the two outer heating wires 121 include a first outer heating wire 1211 and a second outer heating wire 1212; the resistance of the first outer heating wire 1211 is less than that of the second outer heating wire 1212. This design can make the e-liquid near the first outer heating wire 1211 heat up and evaporate faster, improving the e-liquid burst taste of the atomizing core. Specifically, the purpose of "controlling the different resistances of the two outer heating wires 121" can be achieved by means of "setting the first outer heating wire 1211 and the second outer heating wire 1212 to have the same material and equal wire widths, but the first outer heating wire 1211 has a shorter wire length", "the first outer heating wire 1211 and the second outer heating wire 1212 have the same material and equal wire lengths, but the first outer heating wire 1211 has a larger wire width", "the first outer heating wire 1211 and the second outer heating wire 1212 have equal wire widths and wire lengths, but the resistivity of the material of the first outer heating wire 1211 is lower", etc.

[0089] See Figure 3 , in some embodiments of the present utility model, the arched portion of the bending part 123 of the middle heating wire 122 is configured to be close to the second outer heating wire 1212.

[0090] See Figures 1 to 6 , in some embodiments of the present utility model, the two outer heating wires 121 include a first outer heating wire 1211 and a second outer heating wire 1212; the resistance of the first outer heating wire 1211 is less than that of the second outer heating wire 1212. This design can make the e-liquid near the first outer heating wire 1211 heat up and evaporate faster, improving the e-liquid burst taste of the atomizing core; the arched portion of the bending part 123 of the middle heating wire 122 is configured to be close to the second outer heating wire 1212 to compensate for the problem of lower heating efficiency caused by the higher resistance value of the second outer heating wire 1212; it can be understood that the above design of resistance value difference can achieve coordinated heating and uniform heating, having a good synergistic effect, greatly improving the reduction degree of the smoke under low power, enhancing the tasting experience, and prolonging the suction life of the product.

[0091] In some embodiments of the present utility model, the number of the middle heating wires 122 is one; the shape and area of the region formed by enclosing one of the outer heating wires 121 and this middle heating wire 122 are the same as the shape and area of the region formed by enclosing the other outer heating wire 121 and this middle heating wire 122.

[0092] It should be noted that, in some embodiments of the present invention, the above-mentioned “the shape and area of the region enclosed by one of the outer heating wires 121 and the middle heating wire 122” does not include the heating wire 12 itself, that is, the shape and area of the region do not include the line width of the heating wire 12; the above-mentioned “the shape and area of the region enclosed by another of the outer heating wires 121 and the middle heating wire 122” also does not include the heating wire 12 itself, that is, the shape and area of the region also do not include the line width of the heating wire 12.

[0093] However, in some other embodiments of the present invention, the shapes and areas of the two enclosed regions mentioned above may include the line width of the heating line 12 .

[0094] In some embodiments of the present invention, the number of the middle heating wire 122 is one; the two outer heating wires 121 and the middle heating wire 122 have different shapes.

[0095] See also Figure 1 In some embodiments of the present invention, the two outer heating wires 121 are both away from the middle heating wire 122 and arched outward. This design can make the heating area covered by the heating element 12 as a whole larger.

[0096] See also Figures 1 to 4 In some embodiments of the utility model, the number of the bending parts 123 of at least one of the middle heating wires 122 is greater than the number of the bending parts 123 of at least one of the outer heating wires 121; when the resistance value of the middle heating wire 122 is large and the heating power is small, the heating effect of the middle position can be balanced by setting multiple bending parts 123 on the single middle heating wire 122, so as to improve the heating effect of the heating element 12 on the adsorbent 3, make the heating effect more sufficient and uniform, and prolong the product life and improve the taste of the product.

[0097] See also Figures 1 to 4 In some embodiments of the present invention, the two outer heating wires 121 are straight lines, and at least one of the middle heating wires 122 is a smooth curve.

[0098] See also Figure 5 In some embodiments of the present invention, the outer heating wire 121 and the middle heating wire 122 are both straight lines.

[0099] It is understandable that the routing pattern of each heating wire can be selected and appropriately adjusted according to different actual needs and design standards to improve the heating effect of the heating element 12 on the adsorbent 3 and the e-liquid, thereby extending the service life of the product and improving the taste of the smoke.

[0100] For details, seeFigure 1 The two outer heating wires 121 deviate from each other and arch outward. The two outer heating wires 121 are generally in a C shape to cover a larger area on the adsorbent 3, so as to fully heat the adsorbent 3 and the e-liquid adsorbed thereon. The middle heating wire 122 located between the two outer heating wires 121 is provided with two bending portions 123 to more fully cover the area between the two heating wires 121. This is because in this embodiment, the two outer heating wires 121 have a smaller resistance and generate more heat, but the middle heating wire 122 has a larger resistance and generates less heat. Therefore, the above two bending portions 123 are provided to compensate for this part of the heat difference.

[0101] Refer again to Figure 2 The two outer heating wires 121 are generally in an S shape, so that the areas on the adsorbent 3 corresponding to the two outer heating wires 121 can be fully heated. The middle heating wire 122 located between the two outer heating wires 121 is provided with two bending portions 123 to more fully cover the area between the two heating wires 121. This is because in this embodiment, the two outer heating wires 121 have a smaller resistance and generate more heat, but the middle heating wire 122 has a larger resistance and generates less heat. Therefore, the above two bending portions 123 are provided to compensate for this part of the heat difference.

[0102] Refer again to Figure 3 The first outer heating wire 1211 is provided with seven bending portions 123, the second outer heating wire 1212 is provided with seven bending portions 123, and the middle heating wire 122 located between the two outer heating wires 121 is provided with seven bending portions 123. Among them, the resistance of the first outer heating wire 1211 in this embodiment is less than that of the second outer heating wire 1212, so that the heat generation amount of the second outer heating wire 1212 is less than that of the first outer heating wire 1211. At this time, in order to compensate for the temperature of the area near the second outer heating wire 1212, the bending portions 123 on the middle heating wire 122 can be set to approach and arch toward the second outer heating wire 1212. Thus, the heat generation amount of the middle heating wire 122 is used to compensate for the temperature of the area near the second outer heating wire 1212 to make the temperature balanced.

[0103] Refer to Figure 4 The two outer heating wires 121 are both straight lines, and the middle heating wire 122 located between the two outer heating wires 121 is generally in an S shape.

[0104] Refer to Figure 5 The two outer heating wires 121 and the middle heating wire 122 are both straight lines.

[0105] Refer to Figure 6, the two outer heating wires 121 are arcs roughly in a C shape, and the middle heating wire 122 located between the two outer heating wires 121 is roughly in an S shape. Moreover, in this case, the shapes of the two contacts 11 are any one of circular, semi-circular, and crescent-shaped.

[0106] The second aspect

[0107] See Figure 8 , an atomizing core 2, including an adsorbent 3 capable of adsorbing e-liquid and having a porous structure, and a heating element 1 as described in Embodiment 1 in contact with the adsorbent 3; it should be noted that due to the use of the heating element 1 provided by the present invention, the atomizing core 2 has a longer service life and can provide a better smoking taste.

[0108] In some embodiments of the present invention, the two outer heating wires 121 are respectively distributed in at most half of the area of one planar surface of the adsorbent 3 to achieve a more sufficient and uniform heating effect and obtain a better smoking experience.

[0109] In some embodiments of the present invention, the material of the adsorbent 3 is ceramic or glass, and the adsorbent 3 has a porous structure, which is beneficial to accommodating more e-liquid for the heating element 1 to heat, evaporate, and gasify.

[0110] In some embodiments of the present invention, when the adsorbent 3 is made of glass, the properties of the glass need to be selected and adjusted according to actual design standards and application scenarios to enable it to achieve the functions of fully adsorbing and guiding e-liquid, and it is required that there is a good matching degree between the glass adsorbent 3 and the heating element 1 to ensure the service reliability of the product.

[0111] See Figure 8 , a resistance paste is printed on the surface of the adsorbent 3, and the adsorbent 3 and the printed resistance paste are sintered together at high temperature to obtain the atomizing core 2.

[0112] See Figure 8 , in some embodiments of the present invention, the adsorbent 3 is pre-sintered and formed first, and then a resistance paste is printed on the surface of the adsorbent 3, dried, and sintered to obtain the atomizing core 2.

[0113] In some embodiments of the present invention, an electrode heating paste is printed on the sintered adsorbent 3. First, it is dried in a constant temperature drying oven at 50 - 80°C for 20 - 40 min, and then sintered at a high temperature of 900 - 1100°C to obtain the atomizing core 2 in which the heating element 2 and the adsorbent 3 are firmly combined.

[0114] In some embodiments of the present utility model, when printing the resistive heating paste onto the surface of the adsorbent body 3, the pattern of the paste is two-dimensional, but after sintering, the cured part of the heating wire 12 will be recessed into the adsorbent body 3 to a certain extent to enhance the bonding force between the heating element 1 and the adsorbent body 3.

[0115] In some embodiments of the present utility model, the recessed depth of the heating wire 12 on the surface of the ceramic adsorbent body 3 after sintering can be 10 - 20 μm, specifically, it can be any value among 12 μm, 15 μm or 18 μm, or any value within the range formed by any two of these values.

[0116] In some embodiments of the present utility model, the components of the resistive heating paste used to make the heating wire 12 can contain glass powder, or glass raw material powder that can become glass through the sintering process.

[0117] The third aspect

[0118] A manufacturing method of the above-mentioned atomizing core includes the following steps:

[0119] S1, providing the adsorbent body 3 and the resistive paste for manufacturing the contact 11 and the heating wire 12;

[0120] S2, applying the resistive paste to the surface of the adsorbent body 3 to form a heating circuit pattern including the contact 11 and the heating wire 12;

[0121] S3, performing high-temperature sintering on the adsorbent body 3 with the heating circuit pattern to obtain the atomizing core.

[0122] It should be noted that the specific method of "applying the resistive paste to the surface of the adsorbent body 3" in the above step S2 can be any one of printing, sputtering, spraying, sprinkling, etc.

[0123] In some embodiments of the present utility model, between the steps S1 and S2, grooves are processed on the surface of the adsorbent body 3, and the grooves are used to accommodate the resistive paste; it can be understood that the grooves can define the position of the resistive paste, avoiding unnecessary displacement of the resistive paste under external interferences such as jitter, so as to prevent the shape of the finally obtained heating element 1 from not conforming to the originally set shape. In other words, the function of the grooves on the surface of the adsorbent body 3 is to improve the yield rate of the finally obtained heating element 1.

[0124] Exemplarily, in some embodiments of the present utility model, the depth of the grooves can be 5 - 20 μm, and can be specifically selected and adjusted according to actual design standards.

[0125] In some embodiments of the present utility model, between the steps S1 and S2, the adsorbent body 3 is pre-sintered.

[0126] Fourth aspect

[0127] An electronic cigarette, comprising: the above-mentioned atomizing core 2; and a power source connected to the contact point 11 of the atomizing core 2. It should be noted that due to the use of the heating element 1 and / or the atomizing core 2 provided by the present utility model, the electronic cigarette has a longer service life and can provide a better smoking taste; wherein the positive and negative electrodes of the power source and the contact point 11 can be in direct contact or indirectly connected through wires or the like.

[0128] In some embodiments of the present utility model, the materials of the positive and negative electrodes of the power source can be copper and its alloys.

[0129] As mentioned above, the above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should 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 utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model, and the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A heating element (1) for an e-cigarette atomizing core, the heating element (1) comprising two electrical contacts (11) for conducting electricity and a heating wire (12) electrically connected to the two electrical contacts (11), characterized in that: The number of the heating wires (12) is at least three, including two outer heating wires (121) located on the outermost sides and at least one intermediate heating wire (122) located between the two outer heating wires (121); Wherein, the resistance of at least one of the intermediate heating wires (122) is greater than or equal to the resistance of each of the outer heating wires (121).

2. The heating element (1) according to claim 1, characterized in that, The resistivity of the material of the intermediate heating wire (122) is greater than the resistivity of the material of the outer heating wire (121); And / or, the volume of the intermediate heating wire (122) is greater than the volume of the outer heating wire (121).

3. The heating element (1) according to claim 1, characterized in that, The wire length of the intermediate heating wire (122) is greater than the wire length of the outer heating wire (121); Or, the wire width of the intermediate heating wire (122) is less than the wire width of the outer heating wire (121); Or, the thickness of the intermediate heating wire (122) is less than the thickness of the outer heating wire (121).

4. The heating element (1) according to any one of claims 1 to 3, characterized in that, The heating wire (12) and the electrical contact (11) are integrally formed; Or, the heating wire (12) and the electrical contact (11) are electrically connected via a conductive medium.

5. The heating element (1) according to claim 4, characterized in that, The heating wire (12) and the electrical contact (11) are made of resistance paste by high-temperature sintering.

6. The heating element (1) according to any one of claims 1 to 3, characterized in that, At least one of the outer heating wire (121) and the intermediate heating wire (122) is a smooth curve, and the smooth curve includes at least one bending portion (123).

7. The heating element (1) according to claim 6, wherein, The smooth curve includes a plurality of the bending portions (123), and the 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; And / or, the smooth curve includes a plurality of the bending portions (123), and 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.

8. The heating element (1) according to claim 6, characterized in that, The two outer heating wires (121) include a first outer heating wire (1211) and a second outer heating wire (1212); The resistance of the first outer heating wire (1211) is less than the resistance of the second outer heating wire (1212).

9. The heating element (1) according to claim 8, characterized in that, The arched portion of the bending portion (123) of the intermediate heating wire (122) is configured to be close to the second outer heating wire (1212).

10. The heating element (1) according to any one of claims 1 to 3, characterized in that, The number of the intermediate heating wires (122) is one; The shape and area of the region formed by enclosing one of the outer heating wires (121) and the intermediate heating wire (122) are the same as the shape and area of the region formed by enclosing the other outer heating wire (121) and the intermediate heating wire (122).

11. The heating element (1) according to any one of claims 1 to 3, characterized in that, The number of the intermediate heating wires (122) is one; The shapes of the two outer heating wires (121) and the intermediate heating wire (122) are different.

12. The heating element (1) according to any one of claims 1 to 3, characterized in that, Both of the two outer heating wires (121) arch outwardly away from the intermediate heating wire (122).

13. The heating element (1) according to any one of claims 1 to 3, characterized in that, The number of bends (123) in at least one single middle heating wire (122) is greater than the number of bends (123) in at least one single outer heating wire (121).

14. The heating element (1) according to any one of claims 1 to 3, characterized in that, The two outer heating wires (121) are straight lines, and at least one of the middle heating wires (122) is a smooth curve.

15. The heating element (1) according to any one of claims 1 to 3, characterized in that, Both the outer heating wire (121) and the middle heating wire (122) are straight lines.

16. The heating element (1) according to any one of claims 1 to 3, characterized in that, The contact (11) is square, and its width dimension is greater than or equal to the wire width of the middle heating wire (122); Alternatively, the contact (11) is circular, and its radial dimension is greater than or equal to the wire width of the middle heating wire (122).

17. An atomization core (2), characterized in that, The atomization core (2) includes an adsorbent (3) that can adsorb e-liquid and at least partially has a porous structure, and a heating element (1) as described in any one of claims 1 to 16, which is in contact with the adsorbent (3).

18. The atomization core (2) according to claim 17, characterized in that, The material of the adsorbent (3) is ceramic or glass.

19. An electronic cigarette, characterized in that, The electronic cigarette includes: An atomization core (2) as described in claim 17 or 18; and A power source, connected to the contact (11) of the atomization core (2), for supplying power to the heating element of the atomization core.

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