Heating body

Abstract

The utility model provides a heating body, the heating body is sheet-shaped, at least one surface of the heating body is provided with a micro-nano structure, the micro-nano structure comprises a plurality of heating grooves arranged on the surface of the heating body, and at least part of adjacent heating grooves are communicated with each other. The heating groove is formed in the surface of the heating body, so that the contact area of atomized liquid and the heating body can be increased, the atomization specific surface area of the heating body can be effectively increased in the same space range, and the atomization efficiency is improved; moreover, at least part of the adjacent heating grooves are communicated with each other, so that an atomized liquid film formed on the surface of the heating body can freely flow and cover the whole surface of the heating body even if the atomized liquid film is thin, dry burning caused by local overheating of the heating body is avoided, residues can be effectively prevented from being formed on the heating body, and the service life of the heating body is prolonged. Therefore, the consistency of the smoking taste can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic atomization devices, in particular to a heating element. Background Art

[0002] In the related art, the heating element is the core component of the electronic atomization device. The heating element generates Joule heat through electric current to heat the atomized liquid to produce aerosol. However, the heating efficiency of the traditional heating element is low, and the atomized liquid is not atomized in time, which is easy to form residues. The residues gradually accumulate on the heating element to form carbon deposits and stick to the core, which will produce undesirable fragrance and lead to poor consistency of the puff taste. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heating element, aiming to solve the problem of poor consistency of the suction taste of the electronic atomization device in the related art.

[0004] In order to solve the above technical problems, the utility model provides a heating element, which is in the shape of a sheet. At least one side of the heating element is provided with a micro-nano structure. The micro-nano structure includes a plurality of heating grooves arranged on the surface of the heating element, and at least some adjacent heating grooves are interconnected.

[0005] Optionally, the micro-nano structure includes a first heating sub-groove and a second heating sub-groove arranged on the surface of the heating element, the second heating sub-groove is located in the first heating sub-groove, and at least one second heating sub-groove is arranged in the first heating sub-groove.

[0006] Optionally, the width of the first heating sub-groove ranges from 20 μm to 600 μm, and the width of the second heating sub-groove is less than 2 μm.

[0007] Optionally, a plurality of the first heating sub-grooves are provided on the surface of the heating element, and at least some adjacent first heating sub-grooves are interconnected.

[0008] Optionally, a plurality of the first heating sub-grooves are regularly arranged.

[0009] Optionally, a boss is formed between two adjacent first heating sub-grooves, and the micro-nano structure further includes a third heating sub-groove arranged on the surface of the boss.

[0010] Optionally, the cross-sectional shapes of the first heating sub-groove, the second heating sub-groove and the third heating sub-groove each include at least one of an ellipse, a circle, a triangle and a polygon.

[0011] Optionally, the micro-nano structure covers part of the surface of the heating element, or,

[0012] The micro-nano structure covers the entire surface of the heating element.

[0013] Optionally, the surface roughness Ra of the heating element ranges from 0.2 μm to 5 μm, and the Rz ranges from 0.8 μm to 30 μm.

[0014] Optionally, the contact angle between the heating element and a mixed solution of propylene glycol and glycerol with a ratio of 1:1 is 10° - 55°, and the contact angle between the heating element and pure water is less than 60°.

[0015] Compared with related technologies, a heating element in the present utility model has the beneficial effects that: setting heating grooves on the surface of the heating element can increase the contact area between the atomization liquid and the heating element, thereby effectively increasing the atomization specific surface area of the heating element within the same space range and improving the atomization efficiency; moreover, since at least some adjacent heating grooves are interconnected, the atomization liquid film formed on the surface of the heating element can flow freely even when it is relatively thin, covering the entire surface of the heating element, thereby avoiding local overheating and dry burning of the heating element, effectively preventing the formation of residues on the heating element, and thus improving the consistency of the suction taste. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is the overall structural schematic diagram of the heating element provided by the embodiment of the present utility model;

[0018] Figure 2 is the morphology diagram of the surface roughness Ra of the heating element provided by the embodiment of the present utility model within the range of 0.6 μm - 0.7 μm and with an optical microscope magnification of 100 times;

[0019] Figure 3 is the morphology diagram of the surface roughness Ra of the heating element provided by the embodiment of the present utility model within the range of 0.9 μm - 1 μm and with an optical microscope magnification of 100 times.

[0020] In the drawings, each reference numeral represents: 1, heating element; 2, micro-nano structure; 21, first heating sub-groove; 22, second heating sub-groove; 23, convex platform. Detailed Embodiments

[0021] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "plurality" and "several" is two or more, unless otherwise specifically defined.

[0024] Embodiment:

[0025] Please refer to Figure 1 、 Figure 2 and Figure 3 , an embodiment of the present utility model provides a heating element 1. The heating element 1 is in a sheet shape, and at least one surface of the heating element 1 is provided with micro-nano structures 2. The micro-nano structures 2 include a plurality of heating grooves provided on the surface of the heating element 1, and at least some adjacent heating grooves communicate with each other. The provision of heating grooves on the surface of the heating element 1 can increase the contact area between the atomized liquid and the heating element 1, so that within the same spatial range, the atomization specific surface area of the heating element 1 can be effectively increased, and the atomization efficiency can be improved; moreover, since at least some adjacent heating grooves communicate with each other, the atomized liquid film formed on the surface of the heating element 1 can flow freely even when it is relatively thin, covering the entire surface of the heating element 1, thereby avoiding local overheating and dry burning of the heating element 1, effectively avoiding the formation of residues on the heating element 1, and thus improving the consistency of the suction taste.

[0026] It should be noted that the micro-nano structure 2 provided on the surface of the heating element 1 is a non-coated structure, which is formed by in-situ three-dimensional construction on the material, thereby effectively avoiding the problems of easy shedding and impurity safety caused by the coating; among them, the in-situ three-dimensional construction can be one of chemical etching, laser etching, or precision machining, and the micro-nano structure refers to a micro-hole groove structure with dimensions in the micron or nano level.

[0027] In some embodiments, the heating element 1 is arranged on one side of the oil guide cotton, and the surface of the heating element 1 in contact with the oil guide cotton is provided with a micro-nano structure 2; alternatively, the heating element 1 is inserted into the oil guide cotton, and the surfaces of the heating element 1 in contact with the oil guide cotton on both sides are provided with a micro-nano structure 2.

[0028] Please refer to Figure 2 and Figure 3 , the micro-nano structure 2 includes a first heating sub-groove 21 and a second heating sub-groove 22 provided on the surface of the heating element 1. The second heating sub-groove 22 is located within the first heating sub-groove 21, thereby forming a nested structure, and at least one second heating sub-groove 22 is provided within the first heating sub-groove 21, which can further increase the atomization specific surface area of the heating element 1, thereby obtaining a more delicate and smooth suction taste.

[0029] According to actual needs, in some embodiments, only one second heating sub-groove 22 can be provided within the first heating sub-groove 21 to simplify the processing process of the micro-nano structure 2. In other embodiments, a plurality of second heating sub-grooves 22 are provided within the first heating sub-groove 21, such as two, three, four, etc. The plurality of second heating sub-grooves 22 can be regularly arranged or irregularly arranged, where the regular arrangement can be an array arrangement, a circular arrangement, a linear arrangement, etc.; and at least some adjacent second heating sub-grooves 22 communicate with each other, which is beneficial to ensuring that the atomized liquid covers the entire surface of the heating element 1 and further avoiding dry burning due to overheating of the heating element 1.

[0030] The width of the first heating sub-groove 21 ranges from 20 μm to 600 μm, such as 20 μm, 40 μm, 100 μm, 200 μm, 300 μm, 600 μm, etc., and the width of the second heating sub-groove 22 is less than 2 μm, such as 2 μm, 1.8 μm, 1.2 μm, 1 μm, 0.5 μm, 0.01 μm, etc. Among them, on the premise of ensuring the easier processing of the second heating sub-groove 22, the smaller the width of the second heating sub-groove 22, the more second heating sub-grooves 22 can be provided within the first heating sub-groove 21, which is beneficial to increasing the atomization specific surface area of the heating element 1 and improving the atomization efficiency. The depth of the first heating sub-groove 21 ranges from 1 μm to 30 μm, such as 1 μm, 5 μm, 10 μm, 20 μm, 26 μm, 30 μm, etc., and the depth of the second heating sub-groove 22 is less than the depth of the first heating sub-groove 21.

[0031] It should be understood that the width of the groove refers to the distance between two wave crests.

[0032] Please refer to Figure 3 , a plurality of first heating sub-grooves 21 are provided on the surface of the heating element 1, and at least some adjacent first heating sub-grooves 21 communicate with each other, which is beneficial to ensuring that the atomized liquid covers the entire surface of the heating element 1 and further avoiding dry burning caused by local overheating of the heating element 1. The plurality of first heating sub-grooves 21 are regularly arranged, such as arranged in an array, circularly arranged, linearly arranged; according to actual needs, the plurality of first heating sub-grooves 21 can also be irregularly arranged.

[0033] Please refer to Figure 3 , a boss 23 is formed between two adjacent first heating sub-grooves 21, and the micro-nano structure 2 further includes a third heating sub-groove provided on the surface of the boss 23. The width of the third heating sub-groove is smaller than the width of the second heating sub-groove 22, preferably a nano-level groove. By providing the first heating sub-groove 21, the second heating sub-groove 22 and the third heating sub-groove on the surface of the heating element 1, the micro-nano structure 2 can cover the entire surface of the heating element 1.

[0034] The cross-sectional shapes of the first heating sub-groove 21, the second heating sub-groove 22 and the third heating sub-groove all include at least one of an ellipse, a circle, a triangle and a polygon. For example, the cross-section of the first heating sub-groove 21 can all be circular, the cross-section of the second heating sub-groove 22 can all be triangular, and the cross-section of the third heating sub-groove can all be elliptical; or, the cross-section of the first heating sub-groove 21 can be partially elliptical and partially circular, the cross-section of the second heating sub-groove 22 can be partially circular and partially triangular, and the cross-section of the third heating sub-groove can be partially elliptical and partially polygonal.

[0035] In some embodiments, the micro-nano structure 2 covers a part of the surface of the heating element 1. For example, the micro-nano structure 2 covers the middle area of the surface of the heating element 1, which can reduce the processing difficulty of the micro-nano structure 2; or, the micro-nano structure 2 covers the entire surface of the heating element 1, so that the atomization specific surface area of the heating element 1 is the largest and the atomization efficiency is guaranteed.

[0036] The value range of the surface roughness Ra of the heating element 1 is 0.2 μm - 5 μm, such as 0.2 μm, 0.5 μm, 1 μm, 2 μm, 3 μm, 5 μm, etc., and the value range of Rz is 0.8 μm - 30 μm, such as 0.8 μm, 5 μm, 10 μm, 20 μm, 25 μm, 30 μm, etc. The heating element 1 can be made of a metal material or a conductive ceramic material. The smaller the surface roughness of the heating element 1, the better the wettability, the easier the atomized liquid is distributed on the surface of the heating element 1, and the higher the heat transfer efficiency between the heating element 1 and the atomized liquid, and the higher the atomization efficiency.

[0037] It should be noted that in the actual process of measuring the surface roughness of the heating element 1, only the surface roughness Ra of the heating element 1 or the surface roughness Rz of the heating element 1 can be measured. The roughness can be measured by the following methods:

[0038] 1. Use Mitutoyo contact roughness meter SJ-210 to measure the surface of the heating element 1. For each group of materials, test 3 times in each direction and take the average value; obtain the Ra and Rz values respectively.

[0039] 2. Use an optical microscope to perform three-dimensional reconstruction on the surface of the heating element 1. Select three different positions and take two straight lines in the horizontal and vertical directions respectively, so as to measure the Ra and Rz values.

[0040] 3. For surface dimension measurement, it can be magnified by an optical microscope, and the size and depth of the micro-nano structure 2 on the surface of the heating element 1 can be measured through the conversion relationship between pixel points and actual dimensions.

[0041] 4. For the contact angle measurement method, use the sessile drop oil guiding method. Place the heating element 1 on a plane, quantitatively drop 6 or 12 μL of solution with a dropper, let the solution spread out fully, and measure the angle between the liquid drop and the surface of the heating element 1 from the side.

[0042] In some embodiments, the contact angle between the heating element 1 and the mixed solution of propylene glycol and glycerol with a ratio of 1:1 is 10° - 55°, such as 10°, 20°, 30°, 40°, 55°, etc.; the contact angle between the heating element 1 and pure water is less than 60°, such as 30°, 40°, 50°, 60°, etc., to ensure better wettability of the surface of the heating element 1. It should be understood that the above contact angle is obtained under the conditions of cleaning and drying of the heating element 1.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heating element, characterized in that: The heating element is in sheet form, and at least one side of the heating element is provided with a micro-nano structure, wherein the micro-nano structure comprises a plurality of heating grooves arranged on the surface of the heating element, and at least some of the adjacent heating grooves are interconnected.

2. The heating element according to claim 1, characterized in that: The micro-nano structure includes a first heating sub-groove and a second heating sub-groove arranged on the surface of the heating element, the second heating sub-groove is located in the first heating sub-groove, and at least one second heating sub-groove is arranged in the first heating sub-groove.

3. The heating element according to claim 2, characterized in that: The width of the first heating sub-groove ranges from 20 μm to 600 μm, and the width of the second heating sub-groove is less than 2 μm.

4. The heating element according to claim 2, characterized in that: A plurality of the first heating sub-grooves are provided on the surface of the heating element, and at least some of the adjacent first heating sub-grooves are connected to each other.

5. The heating element according to claim 2, characterized in that: The plurality of first heating sub-grooves are regularly arranged.

6. The heating element according to claim 5, characterized in that: A boss is formed between two adjacent first heating sub-grooves, and the micro-nano structure further includes a third heating sub-groove arranged on the surface of the boss.

7. The heating element according to claim 6, characterized in that The cross-sectional shapes of the first heating sub-groove, the second heating sub-groove and the third heating sub-groove each include at least one of an ellipse, a circle, a triangle and a polygon.

8. The heating element according to claim 1, characterized in that The micro-nano structure covers part of the surface of the heating element, or, The micro-nano structure covers the entire surface of the heating element.

9. The heating element according to claim 1, characterized in that: The roughness Ra of the surface of the heating element ranges from 0.2 μm to 5 μm, and the roughness Rz ranges from 0.8 μm to 30 μm.

10. The heating element according to claim 1, characterized in that The contact angle between the heating element and a 1:1 mixed solution of propylene glycol and glycerol is 10°-55°, and the contact angle between the heating element and pure water is less than 60°.

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