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

Abstract

Provided in the present invention are a heating element for an atomizing core of an electronic cigarette, an atomizing core and a manufacturing method therefor, and an electronic cigarette. The heating element comprises two contacts for electrification and heating wires electrically connected to the two contacts. There are at least three heating wires, including two outer heating wires located on the outermost side and at least one middle heating wire located between the two outer heating wires, wherein the resistance of the at least one middle heating wire is greater than or equal to the resistance of each outer heating wire. The atomizing core comprises the heating element. The electronic cigarette comprises the atomizing core. By means of the heating element for an atomizing core of an electronic cigarette, the atomizing core and the manufacturing method therefor, and the electronic cigarette provided in the present invention, the heating effect of the heating element is more uniform, thereby reducing the accumulation of carbon deposits to prolong the service life of a product, and increasing the atomizing speed under low-power conditions to improve the flavor burst effect of e-liquid.

Description

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

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

[0002] The core component of electronic cigarette is atomizing core, which includes oil adsorption body and heating element. The heating element forms mist by heating the oil permeated / stored in the oil adsorption body of the atomizing core. The performance of the atomizing core affects the amount of smoke inhaled, taste and puffs. The heating wire in the currently used heating element is mostly single-wire longitudinal heating, with two contacts at both ends for contacting the power supply to be electrified, and the single-wire heating wire in the middle can have multiple bends. The current heating wire design has the following shortcomings: 1. Single-wire longitudinal heating cannot provide a large enough heating area, resulting in uneven heating, slow oil climbing in some areas, insufficient supply and unstable sweetness and aroma during puffing; 2. Single-wire has high resistance, and multiple bends will cause slow heating, thereby affecting the oil atomization effect and reducing the puffing taste; 3. The single-wire heating wire is prone to problems such as soot and carbon deposition during long-term operation, and the service life of the atomizing core is shortened.

[0003] Therefore, how to make the heating effect of the heating element more uniform, how to improve the atomization speed under low power to improve the aroma explosion effect of the oil, and how to reduce soot and carbon deposition to improve the service life of the product are urgent problems to be solved. SUMMARY

[0004] The purpose of the present application is to provide a heating element for electronic cigarette atomizing core, atomizing core, manufacturing method thereof and electronic cigarette, so as to 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 improving the atomization speed under low power to improve the aroma explosion effect of the oil.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] A heating element for electronic cigarette atomizing core, the heating element comprising two contacts for electrification and a heating wire electrically connected to the two contacts:

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

[0008] Among them, 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 present application, the intermediate heating wire has a material with a higher resistivity than the material of the outer heating wire.

[0010] In some embodiments of the present application, the intermediate heating wire has a volume greater than the volume of the outer heating wire.

[0011] In some embodiments of the present application, the intermediate heating wire has a length greater than the length of the outer heating wire.

[0012] In some embodiments of the present application, the intermediate heating wire has a width less than the width of the outer heating wire.

[0013] In some embodiments of the present application, the intermediate heating wire has a thickness less than the thickness of the outer heating wire.

[0014] In some embodiments of the present application, the heating wire and the contact are integrally formed, preferably made of resistive paste through high-temperature sintering.

[0015] In some embodiments of the present application, the heating wire and the contact are electrically connected via a conductive medium.

[0016] In some embodiments of the present application, at least one of the outer heating wire and the intermediate heating wire is a smooth curve, and the smooth curve includes at least one curved portion.

[0017] In some embodiments of the present application, the smooth curve includes a plurality of curved portions, and each two adjacent curved portions are smoothly connected and form at least one of an S shape, an M shape, a W shape, an N shape, or a Z shape.

[0018] In some embodiments of the present application, the smooth curve includes a plurality of curved portions, and the curved portions are 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 application, the two outer heating wires include a first outer heating wire and a second outer heating wire.

[0020] In some embodiments of the present application, the first outer heating wire has a smaller resistance than the second outer heating wire.

[0021] In some embodiments of the present application, the curved portion of the intermediate heating wire has an arching portion configured to be close to the second outer heating wire.

[0022] In some embodiments of the present application, the number of intermediate heating wires is one.

[0023] In some embodiments of the present application, the shape and area of the region enclosed by one of the outer heating wires and the intermediate heating wire are the same as the shape and area of the region enclosed by the other of the outer heating wires and the intermediate heating wire.

[0024] In some embodiments of the present application, the number of the intermediate heating wire is one.

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

[0026] In some embodiments of the present application, the two outer heating wires are both arched outward away from the intermediate heating wire.

[0027] In some embodiments of the present application, the number of the bending parts of at least one of the intermediate heating wires is greater than the number of the bending parts of at least one of the outer heating wires.

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

[0029] In some embodiments of the present application, the outer heating wires and the intermediate heating wire are all straight lines.

[0030] In some embodiments of the present application, the contact is square, and the width dimension of the contact is greater than or equal to the line width of the heating wire.

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

[0032] To achieve the above-mentioned purpose, the present application further provides the following technical solutions:

[0033] An atomizing core, comprising an adsorbent capable of adsorbing tobacco tar and having a porous structure at least in part, and a heating body as described above arranged in contact with the adsorbent.

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

[0035] To achieve the above-mentioned purpose, the present application further provides the following technical solutions:

[0036] A manufacturing method of the above-mentioned atomizing core, comprising the following steps:

[0037] S1, providing an adsorbent and a resistive paste for manufacturing a contact and a heating wire;

[0038] S2, applying the resistive paste to the surface of the adsorbent to form a heating circuit pattern comprising the contact and the heating wire;

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

[0040] In some embodiments of the present application, between the steps S1 and S2, a groove is processed on the surface of the adsorbent, and the groove is used for accommodating the resistive paste.

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

[0042] To achieve the above object, the present application further provides the following technical solutions:

[0043] An electronic cigarette, comprising:

[0044] The atomizing core described above; and

[0045] A power supply connected to the contact of the atomizing core, for supplying power to the heating body of the atomizing core.

[0046] Compared with the prior art, the technical solutions of the present application have the following beneficial effects:

[0047] The atomizing core and electronic cigarette provided by the present application can make the heating effect of the heating body more uniform, thereby reducing the accumulation of soot and carbon to improve the service life of the product, and can improve the atomization speed under the condition of small power to improve the aroma explosion effect of the tobacco tar; The specific design scheme adopted is that at least three heating wires are designed to improve the uniform heating effect of the tobacco tar, so as to reduce the amount of soot and carbon accumulation, thereby prolonging the service life of the product, and by making the resistance of the outer heating wire less than or equal to the resistance of the middle heating wire, the heating amount of the outer heating wire is larger, so that the tobacco tar in contact with the outer heating wire can be heated and rapidly evaporated and vaporized in a shorter time, thereby providing a better tobacco tar aroma explosion experience. BRIEF DESCRIPTION OF DRAWINGS

[0048] 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 below. 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.

[0049] Fig. 1 is a structural schematic view of a heating body provided by the first embodiment of the present application;

[0050] Fig. 2 is a structural schematic view of a heating body provided by the second embodiment of the present application;

[0051] Fig. 3 is a structural schematic view of a heating body provided by the third embodiment of the present application;

[0052] Fig. 4 is a structural schematic view of a heating body provided by the fourth embodiment of the present application;

[0053] Fig. 5 is a structural schematic view of a heating body provided by the fifth embodiment of the present application;

[0054] Fig. 6 is a structural schematic view of a heating body provided by the sixth embodiment of the present application;

[0055] Fig. 7 is a structural schematic diagram of a single-wire heating element in the prior art;

[0056] Fig. 8 is a structural schematic diagram of an atomizing core provided by a seventh embodiment of the present application.

[0057] In the drawings of the present application, the main reference signs are explained as follows: 1 - heating element; 11 - contact; 12 - heating wire; 121 - outer heating wire; 1211 - first outer heating wire; 1212 - second outer heating wire; 122 - intermediate heating wire; 123 - bending part; 2 - atomizing core; 3 - adsorbing body. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0059] It should be understood that the specific embodiments described herein are merely illustrative and explanatory and are not intended to limit the present application.

[0060] Any specific numerical values (including the endpoints of numerical ranges) disclosed in this specification are not to be understood as limiting, unless otherwise indicated. Rather, they are to be understood as approximations that can vary a little depending on the desired properties sought to be obtained by the discloser. Also, any numerical range recited herein is intended to include all sub-ranges of the same numerical precision subsumed in the recited range. For example, a range of "1 to 10" is intended to include all sub-ranges between (and including) the recited minimum value of 1 and the recited maximum value of 10, that is, all sub-ranges having a minimum value of equal to or greater than 1 and a maximum value of equal to or less than 10, so long as a numerical value between 1 and 10 is expressed. Also, a range between distinct endpoints includes all the more particular ranges therebetween. For example, a range of "1 to 10" includes a range of "1 to 6", a range of "1 to 4", a range of "4 to 6", a range of "5 to 10" and so forth.

[0061] Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. If any term is defined differently from its commonly accepted meaning, the term is defined herein and the definition will supersede any commonly accepted meaning.

[0062] First aspect

[0063] Referring to Figs. 1 to 6, a heating element 1 comprises two contacts 11 for power supply and a heating wire 12 electrically connected to the two contacts 11; the number of the heating wire 12 is at least three, including two outer heating wires 121 located at the outermost sides and at least one intermediate heating wire 122 located between the two outer heating wires 121; wherein the electrical resistance of at least one intermediate heating wire 122 is greater than or equal to each outer heating wire 121.

[0064] Specifically, the heating body 1 designed in the present application has at least three heating wires 12, as can be seen from FIGS. 1 to 6, which can provide a larger heating area on the surface of the adsorption body 3 to provide a more uniform and sufficient heating effect, solving the problem of the prior art that the heating area is small due to the number of heating wires 12 being only one or two, resulting in a slow temperature rising speed of part of the tobacco tar, insufficient supply of tobacco tar vapor, and thus affecting the tobacco tar atomization effect and reducing the taste of the product.

[0065] It can be understood that the present application designs the heating wire 11 in the heating body 1 to be at least three, and the resistance of the middle heating wire 122 located in the middle position is greater than or equal to the resistance of the outer heating wire 121 on both sides, so that the surface temperature distribution of the adsorption body 3 is more uniform, the atomization speed is faster under low-power working conditions, the tobacco tar aroma explosion effect is better, and the generation of tobacco scale carbon is reduced, thereby improving the service life of the atomization core and improving the taste quality of the product; Specifically, the two outer heating wires 121 enclose the middle position, at this time, if the resistance value of the middle heating wire 122 is set to be smaller, the current of the middle heating wire 122 will be larger and thus the heat generation will be larger, plus the heat transfer from the two outer heating wires 121 on both sides, which will cause the adsorption body 2 surface at the middle position to accumulate too much heat and the temperature to rise rapidly, which will cause tobacco scale carbon, which will weaken the service life of the heating body 1 and the adsorption body 3 and also affect the taste of the product, therefore, it is necessary to set the resistance value of the middle heating wire 122 to be greater than or equal to the resistance value of the outer heating wire 121 on both sides to ensure that the surface temperature of the adsorption body 3 at the middle position can rise relatively slowly.

[0066] Referring to FIG. 7, FIG. 7 shows an atomization core 2 provided by the prior art, which includes a heating body 1 arranged on the surface of an adsorption body 3, and it can be seen that it has only one heating wire, compared with the design of at least three heating wires provided by the present application, it is obvious that the area of the heating area on the surface of the adsorption body 3 covered by the single heating wire in the prior art is smaller and more limited, while the design of at least three heating wires provided by the present application can significantly increase the heating area on the surface of the adsorption body 3, so that the heating of the tobacco tar is more uniform and sufficient, thereby improving the taste of the product.

[0067] In some embodiments of the present application, the number of middle heating wires 122 can also be any one of two, three, four, five and above.

[0068] In some embodiments of the present application, the resistance value of the middle heating wire 122 can be set to be greater than the resistance value of the outer heating wires 121 on both sides, so that the heat and heat power of the middle heating wire 122 are smaller than those of the outer heating wires 121, so as to ensure that the surface temperature of the adsorbent 3 at the middle position does not rise sharply, so that the temperature distribution is more uniform, thereby prolonging the service life of the product and improving the explosion effect of the tobacco tar aroma.

[0069] The heating body provided by the present application has more uniform heating effect, thereby reducing the accumulation of soot and carbon to improve the service life of the product, and can improve the atomization speed under small power conditions to improve the aroma explosion effect of the tobacco tar; the specific design scheme is that at least three heating wires 12 are designed to improve the uniform heating effect of the tobacco tar, so as to reduce the amount of soot and carbon accumulation, thereby prolonging the service life of the product, and by making the resistance of the outer heating wire 121 smaller than or equal to the resistance of the middle heating wire 122, the heat of the outer heating wire 121 is greater, so that the tobacco tar in contact with the outer heating wire 121 can be heated and rapidly evaporated and vaporized in a shorter time, thereby providing a better tobacco tar aroma explosion experience.

[0070] In some embodiments of the present application, 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 materials with different resistivities to have a desired resistance.

[0071] Referring to FIGS. 1-4, in some embodiments of the present application, the volume of the middle heating wire 122 is greater than the volume of the outer heating wire 121. It can be understood that, in the case that the material of the heating wire 12 is the same, the greater the volume of the heating wire 12, the greater its resistance value, and 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 has a smaller heat.

[0072] Referring to FIGS. 1-4, in some embodiments of the present application, the length of the middle heating wire 122 is greater than the length of the two outer heating wires 121. It can be understood that, in the case that the material, width and thickness of the heating wire 12 are the same, the longer the length of the heating wire 12, the greater its resistance value, and 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 longer length has a smaller heat.

[0073] Referring to FIG. 1 to FIG. 6, in some embodiments of the present application, the middle heating wire 122 has a smaller width than the two outer heating wires 121. It is worth mentioning that, when the material, length and thickness of each heating wire 12 are the same, the smaller the width of the heating wire 12, the greater the resistance value of the heating wire 12. When the voltage at both ends is the same, the current flowing through the heating wire 12 is smaller, and thus the heating amount of the heating wire 12 with a smaller width is smaller.

[0074] Referring to FIG. 1 to FIG. 6, in some embodiments of the present application, the middle heating wire 122 has a smaller thickness than the two outer heating wires 121. It is worth mentioning that, when the material, length and width of each heating wire 12 are the same, the smaller the thickness of the heating wire 12, the greater the resistance value of the heating wire 12. When the voltage at both ends is the same, the current flowing through the heating wire 12 is smaller, and thus the heating amount of the heating wire 12 with a smaller thickness is smaller.

[0075] Of course, in some other embodiments of the present application, the width of the middle heating wire 122 can be slightly larger than the width of the two outer heating wires 121, but it is required that the length of the middle heating wire 122 is long enough to make the resistance value of the middle heating wire 122 as a whole greater than the resistance value of the outer heating wires 121, so as to ensure 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.

[0076] In some embodiments of the present application, the heating wire 12 and the contact 11 are integrally formed, and are preferably made of resistance paste through high-temperature sintering.

[0077] In some embodiments of the present application, the heating wire 12 and the contact 11 are electrically connected through a conductive medium, which can be a wire, a lead or other materials or devices with conductive ability.

[0078] It can be understood that, referring to FIG. 1 to FIG. 6, the size of the contact 11 is larger than the width of the heating wire 11, which is to reduce the resistance of the contact 11 and make the contact 11 not heat or heat as much as possible, because the contact 11 is to be connected with the positive and negative poles of the power supply, and if the contact 11 heats too much and the temperature is too high, it will damage the positive and negative poles of the power supply connected therewith, and thus damage the power supply. In addition, making the contact 11 larger can also facilitate the improvement of the difficulty of the contact between the positive and negative poles of the power supply and the contact 11, increase the contact probability of the contact 11 and the positive and negative poles of the power supply, and avoid the problem of disconnection of the product during use.

[0079] Among them, referring to FIG. 1 to FIG. 5, the shape of the contact 11 can be a square, and in some embodiments, it can also be a square with rounded corners; referring to FIG. 6, the shape of the contact 11 can also be any one of a circle, a semicircle and a crescent.

[0080] Referring to FIGS. 1-4, in some embodiments of the present application, at least one of the outer heating lines 121 and the middle heating line 122 is a smooth curve, and the smooth curve includes at least one bending portion 123. Among them, as shown in FIGS. 1-3, the three cases are that both the outer heating lines 121 and the middle heating line 122 are smooth curves; and the case of FIG. 4 is that only the middle heating line 122 is a smooth curve, and the two outer heating lines 121 are straight lines.

[0081] Referring to FIGS. 1-4 and FIG. 6, in some embodiments of the present application, the smooth curve includes a plurality of the bending portions 123, and each two adjacent bending portions 123 are smoothly connected and form at least one of S-shaped, M-shaped, W-shaped, N-shaped or Z-shaped.

[0082] Referring to FIGS. 1-4, in some embodiments of the present application, the smooth curve includes a plurality of the bending portions 123, and the bending portions 123 are at least one of C-shaped, U-shaped, V-shaped, L-shaped or J-shaped.

[0083] It can be understood that the specific shape of the bending portion 123 and the specific shape of the heating line 12 can be selected and designed according to actual design standards and use requirements.

[0084] In some embodiments of the present application, for the adsorbent 3 with a larger planar size, in order to solve the problem of narrow coverage of the heating line 12, a plurality of bending portions 123 can be provided to improve and uniform the heating effect, so as to improve the taste of the product.

[0085] Referring to FIGS. 1-6, in some embodiments of the present application, the two outer heating lines 121 include a first outer heating line 1211 and a second outer heating line 1212; and the resistance of the first outer heating line 1211 is smaller than the resistance of the second outer heating line 1212. This design can make the tobacco tar near the first outer heating line 1211 evaporate faster, thereby improving the burst taste of the atomizer. Specifically, the purpose of "controlling the resistance of the two outer heating lines 121 to be different" can be achieved by "setting the material of the first outer heating line 1211 and the second outer heating line 1212 to be the same, and the line width to be equal, but the line length of the first outer heating line 1211 to be shorter", "setting the material of the first outer heating line 1211 and the second outer heating line 1212 to be the same, and the line length to be equal, but the line width of the first outer heating line 1211 to be larger", "setting the line width and the line length of the first outer heating line 1211 and the second outer heating line 1212 to be equal, but the resistivity of the material of the first outer heating line 1211 to be lower", and the like.

[0086] Referring to FIG. 3, in some embodiments of the present application, the arching part of the bending portion 123 of the middle heating line 122 is configured to be close to the second outer heating line 1212.

[0087] Referring to FIGS. 1-6, in some embodiments of the present application, 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. This design can make the tobacco liquid near the first outer heating wire 1211 evaporate faster, improving the burst taste of the atomizer core; the arch part of the curved 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 due to the higher resistance value of the second outer heating wire 1212; it can be understood that the above-mentioned resistance value difference design can realize coordinated heating and uniform heating, has a good synergistic effect, greatly improves the reduction degree of smoke under low power, improves the taste of the product, and prolongs the service life of the product.

[0088] In some embodiments of the present application, the number of the middle heating wire 122 is one; the shape and area of the region enclosed by one of the outer heating wires 121 and the middle heating wire 122 are the same as the shape and area of the region enclosed by the other of the outer heating wires 121 and the middle heating wire 122.

[0089] It should be noted that in some embodiments of the present application, 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, i.e., the shape and area of the region does not include the line width of the heating wire 12; the "shape and area of the region enclosed by the other of the outer heating wires 121 and the middle heating wire 122" also does not include the heating wire 12 itself, i.e., the shape and area of the region also does not include the line width of the heating wire 12.

[0090] However, in some other embodiments of the present application, the shapes and areas of the two enclosed regions can include the line width part of the heating wire 12.

[0091] In some embodiments of the present application, the number of the middle heating wire 122 is one; the shapes of the two outer heating wires 121 and the middle heating wire 122 are different.

[0092] Referring to FIG. 1, in some embodiments of the present application, the two outer heating wires 121 are both arched outward away from the middle heating wire 122, which can make the range of the heating area covered by the heating body 12 as a whole larger.

[0093] Referring to FIGS. 1-4, in some embodiments of the present application, the number of bending portions 123 of at least one of the intermediate heating wires 122 is greater than the number of bending portions 123 of at least one of the outer heating wires 121. When the resistance of the intermediate heating wire 122 is greater and the heating power is smaller, the heating effect at the middle position can be balanced by providing multiple bending portions 123 on a single intermediate heating wire 122, so as to improve the heating effect of the heating body 12 on the adsorbent 3, so that the heating effect is more sufficient and uniform, and the product life is prolonged and the taste of the product is improved.

[0094] Referring to FIGS. 1-4, in some embodiments of the present application, the two outer heating wires 121 are straight lines, and at least one of the intermediate heating wires 122 is a smooth curve.

[0095] Referring to FIG. 5, in some embodiments of the present application, the outer heating wires 121 and the intermediate heating wires 122 are straight lines.

[0096] It can be understood that the layout patterns of the heating wires can be selected and appropriately adjusted according to different actual needs and design standards, so as to improve the heating effect of the heating body 12 on the adsorbent 3 and the tobacco tar, thereby prolonging the service life of the product and improving the taste of the product.

[0097] Specifically, referring to FIG. 1, the two outer heating wires 121 are mutually divergent and arch outward, and are substantially C-shaped, so as to cover a larger area of the adsorbent 3, thereby being able to sufficiently heat the adsorbent 3 and the tobacco tar adsorbed thereby. The intermediate heating wire 122 located between the two outer heating wires 121 is provided with two bending portions 123, so as to more sufficiently cover the area between the two heating wires 121. This is because in this embodiment, the two outer heating wires 121 have smaller resistance and generate more heat, but the intermediate heating wire 122 has greater resistance and generates less heat, and therefore the two bending portions 123 are needed to compensate for the difference in heat.

[0098] Referring to FIG. 2, the two outer heating wires 121 are substantially S-shaped, so that the areas of the adsorbent 3 corresponding to the two outer heating wires 121 can be sufficiently heated. The intermediate heating wire 122 located between the two outer heating wires 121 is provided with two bending portions 123, so as to more sufficiently cover the area between the two heating wires 121. This is because in this embodiment, the two outer heating wires 121 have smaller resistance and generate more heat, but the intermediate heating wire 122 has greater resistance and generates less heat, and therefore the two bending portions 123 are needed to compensate for the difference in heat.

[0099] Referring to FIG. 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 intermediate heating wire 122 between the two outer heating wires 121 is provided with seven bending portions 123; wherein the resistance of the first outer heating wire 1211 in this embodiment is less than the resistance of the second outer heating wire 1212, so that the heat generation of the second outer heating wire 1212 is less than the heat generation of the first outer heating wire 1211, at this time, in order to compensate the temperature of the area close to the second outer heating wire 1212, the bending portions 123 on the intermediate heating wire 122 can be arranged to be close to and arch towards the second outer heating wire 1212, thereby, the heat generation of the intermediate heating wire 122 compensates the temperature of the area close to the second outer heating wire 1212 to make the temperature uniform.

[0100] Referring to FIG. 4, the two outer heating wires 121 are straight lines, and the intermediate heating wire 122 between the two outer heating wires 121 is generally S-shaped.

[0101] Referring to FIG. 5, the two outer heating wires 121 and the intermediate heating wire 122 are straight lines.

[0102] Referring to FIG. 6, the two outer heating wires 121 are generally C-shaped arcs, the intermediate heating wire 122 between the two outer heating wires 121 is generally S-shaped, and the shape of the two contacts 11 in this case is any one of a circle, a semicircle, and a crescent.

[0103] The second aspect

[0104] Referring to FIG. 8, an atomizing core 2 includes an adsorbent 3 capable of adsorbing tobacco tar and having a porous structure, and a heating body 1 as described in Embodiment 1 arranged in contact with the adsorbent 3; it is worth noting that because the heating body 1 provided by the application is used, the atomizing core 2 has a longer service life and can provide a better taste of smoking.

[0105] In some embodiments of the application, the two outer heating wires 121 are distributed in at most half of the area of one planar surface of the adsorbent 3, so as to achieve more sufficient and uniform heating effect and obtain a better smoking experience.

[0106] In some embodiments of the application, the material of the adsorbent 3 is ceramic or glass, and the adsorbent 3 has a porous structure, which is conducive to accommodating more tobacco tar for the heating body 1 to heat, evaporate and vaporize.

[0107] In some embodiments of the present application, when the adsorbing body 3 is made of glass, the performance of the glass needs to be selected and adjusted according to the actual design standard and application occasion, so as to achieve the function of fully adsorbing and guiding the tobacco tar, and the adsorbing body 3 made of glass needs to have good matching degree with the heating body 1, so as to ensure the service reliability of the product.

[0108] Referring to FIG. 8, the surface of the adsorbing body 3 is printed with resistance paste, and the adsorbing body 3 and the printed resistance paste are sintered together at high temperature to obtain the atomizing core 2.

[0109] Referring to FIG. 8, in some embodiments of the present application, the adsorbing body 3 is pre-sintered and formed, and then the resistance paste is printed on the surface of the adsorbing body 3, dried, sintered to obtain the atomizing core 2.

[0110] In some embodiments of the present application, the electrode heating paste is printed on the sintered and prepared adsorbing body 3, first dried in a constant temperature drying box at 50-80°C for 20-40 min, and then sintered at high temperature of 900-1100°C to obtain the atomizing core 2 in which the heating body 2 and the adsorbing body 3 are firmly combined.

[0111] In some embodiments of the present application, when the resistance heating paste is printed on the surface of the adsorbing body 3, the pattern of the paste is two-dimensional, but the sintered and solidified part of the heating line 12 will be recessed into the adsorbing body 3 to some extent, so as to enhance the bonding force between the heating body 1 and the adsorbing body 3.

[0112] In some embodiments of the present application, the recessed depth of the sintered heating line 12 on the surface of the adsorbing body 3 made of ceramic material can be 10-20μm, and specifically can be any one value or any value within the range formed by any two values selected from 12μm, 15μm or 18μm.

[0113] In some embodiments of the present application, the resistance heating paste used to make the heating line 12 can contain glass powder or glass raw material powder which can become glass through sintering process.

[0114] The third aspect

[0115] A manufacturing method of the above-mentioned atomizing core, comprising the following steps:

[0116] S1, providing an adsorbing body 3 and resistance paste used to make a contact 11 and a heating line 12;

[0117] S2, applying the resistance paste to the surface of the adsorbing body 3 to form a heating circuit pattern comprising the contact 11 and the heating line 12;

[0118] S3, high-temperature sintering the adsorbent 3 with the heating circuit pattern to obtain the atomizing core.

[0119] It is worth mentioning that the specific way of "applying the resistance paste to the surface of the adsorbent 3" in the above step S2 can be any one of printing, sputtering, spraying, and the like.

[0120] In some embodiments of the present application, between the steps S1 and S2, a groove is processed on the surface of the adsorbent 3, and the groove is used to accommodate the resistance paste. It can be understood that the groove can define the position of the resistance paste, so as to avoid unnecessary displacement of the resistance paste under external force interference such as shaking, thereby causing the shape of the final heating body 1 to be inconsistent with the original setting. In other words, the groove on the surface of the adsorbent 3 can improve the yield of the final heating body 1.

[0121] For example, in some embodiments of the present application, the depth of the groove can be 5-20 μm, which can be selected and adjusted according to the actual design standard.

[0122] In some embodiments of the present application, between the steps S1 and S2, the adsorbent 3 is pre-sintered.

[0123] Fourth aspect

[0124] An electronic cigarette, comprising: the above atomizing core 2; and a power source connected with the contact 11 of the atomizing core 2. It is worth mentioning that, due to the use of the heating body 1 and / or the atomizing core 2 provided by the present application, the electronic cigarette has a longer service life and can provide a better taste; wherein the positive and negative poles of the power source and the contact 11 can be directly contacted or indirectly connected through a wire or the like.

[0125] In some embodiments of the present application, the material of the positive and negative poles of the power source can be copper and its alloy.

[0126] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims. In addition, the specific examples are applied in the description to explain the principles and embodiments of the present application, and the above embodiment description is only used to help understand the method and core idea of the present application, and the content of the description 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: the number of the heating wires (12) is at least three, including two outer heating wires (121) located at the outermost sides and at least one middle heating wire (122) located between the two outer heating wires (121); wherein the resistance of at least one of the middle heating wires (122) is greater than or equal to the resistance of each of the outer heating wires (121).

2. The heat generating body (1) according to claim 1, characterized in that the resistivity of the material of the middle heating wire (122) is greater than the resistivity of the material of the outer heating wire (121); and / or, the volume of the middle heating wire (122) is greater than the volume of the outer heating wire (121).

3. The heat generating body (1) according to claim 1 or 2, characterized in that the length of the middle heating wire (122) is greater than the length of the outer heating wire (121); or, the width of the middle heating wire (122) is less than the width of the outer heating wire (121); or, the thickness of the middle heating wire (122) is less than the thickness of the outer heating wire (121).

4. The heat generating body (1) according to any one of claims 1 to 3, characterized in that the heating wires (12) and the contacts (11) are integrally formed, preferably made of resistive paste through high-temperature sintering; or, the heating wires (12) and the contacts (11) are electrically connected via a conductive medium.

5. The heat generating body (1) according to any one of claims 1 to 4, characterized in that at least one of the outer heating wire (121) and the middle heating wire (122) is a smooth curve, the smooth curve comprising at least one bending portion (123).

6. The heat generating body (1) according to any one of claims 1 to 5, characterized in that the smooth curve comprises a plurality of the bending portions (123), and each two adjacent bending portions (123) are smoothly connected and 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 comprises 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.

7. The heat generating body (1) according to any one of claims 1 to 6, characterized in that the two outer heating wires (121) comprise 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).

8. The heat generating body (1) according to any one of claims 1 to 7, characterized in that the arching portion of the bending portion (123) of the middle heating wire (122) is configured to be close to the second outer heating wire (1212).

9. The heat generating body (1) according to any one of claims 1 to 8, characterized in that the number of the middle heating wire (122) is one; the shape and area of the region enclosed by one of the outer heating wire (121) and the middle heating wire (122) are the same as the shape and area of the region enclosed by the other of the outer heating wire (121) and the middle heating wire (122).

10. The heat generating body (1) according to any one of claims 1 to 9, characterized by the number of the middle heating wire (122) is one; the shapes of the two outer heating wires (121) and the middle heating wire (122) are different.

11. The heat generating body (1) according to any one of claims 1 to 10, characterized in that the two outer heating wires (121) are both arched outward away from the middle heating wire (122).

12. The heat generating body (1) according to any one of claims 1 to 11, characterized by The number of bending portions (123) of at least one of the intermediate heating wires (122) is greater than the number of bending portions (123) of at least one of the outer heating wires (121).

13. The heat generating body (1) according to any one of claims 1 to 12, characterized in that The two outer heating wires (121) are straight lines, and at least one of the intermediate heating wires (122) is a smooth curve.

14. The heat generating body (1) according to any one of claims 1 to 13, characterized by The outer heating wires (121) and the intermediate heating wires (122) are straight lines.

15. The heat generating body (1) according to any one of claims 1 to 14, characterized by The contact (11) is square, and the width dimension is greater than or equal to the line width of the heating wire (122). Alternatively, the contact (11) is circular, and the radial dimension is greater than or equal to the line width of the heating wire (122).

16. An atomizing core (2) characterized in that The atomizing core (2) comprises an adsorbent body (3) capable of adsorbing tobacco tar and having at least partially a porous structure, and a heating body (1) as claimed in any one of claims 1 to 15 arranged in contact with the adsorbent body (3).

17. The atomizer (2) according to claim 16, characterized in that The material of the adsorbent body (3) is ceramic or glass.

18. A method of manufacturing an atomizing core as claimed in claim 16 or 17, characterized in that, The manufacturing method comprises the following steps: S1, providing an adsorbent body (3) 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 (3) to form a heating circuit pattern comprising the contact (11) and the heating wire (12); S3, high-temperature sintering the adsorbent body (3) with the heating circuit pattern to obtain the atomizing core.

19. The manufacturing method according to claim 18, wherein Between the steps S1 and S2, a groove is processed on the surface of the adsorbent body (3), and the groove is used for accommodating the resistance paste; And / or, between the steps S1 and S2, the adsorbent body (3) is pre-sintered.

20. An electronic cigarette, characterised in that The electronic cigarette comprises: The atomizing core (2) as claimed in claim 16 or 17; and A power supply connected to the contact (11) of the atomizing core (2) and used for supplying power to the heating body of the atomizing core.

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