Electronic atomization device, atomization assembly and manufacturing method of atomization assembly

Abstract

The present invention provides an electronic atomization device and an atomization component thereof and a method for manufacturing the atomization component. The atomization component includes a porous matrix and a heating element. The porous matrix includes an atomization surface. The heating element is arranged corresponding to the atomization surface. The thermal expansion coefficient of the porous matrix is ​​greater than or equal to the thermal expansion coefficient of the heating element. The beneficial effects of the present invention are as follows: the heating element can be effectively prevented from warping and deformation, thereby preventing the heating element from being separated from the liquid due to the warping and deformation, causing dry burning, causing excessive temperature, and generating harmful gas, thereby extending its service life.

Description

Technical Field

[0001] The invention relates to a liquid atomization device, in particular to an electronic atomization device and an atomization component thereof and a manufacturing method of the atomization component. Background Art

[0002] A typical atomization assembly for an electronic atomization device such as an electronic cigarette includes a porous ceramic body for conducting liquid and a heating film disposed on the porous ceramic body. The ceramic atomization assembly in the related art is obtained by directly printing electronic paste on a ceramic embryo, baking at high temperature, and then processing electrodes and leads. However, due to the uneven local concentration of the electronic paste when printing the electronic paste, the resistance of the heating circuit is uneven, which leads to uneven distribution of the temperature value of the heating film, which can easily lead to disconnection of the heating circuit and cause the ceramic atomization assembly to warp and deform. When the degree of warping is greater than the ceramic prestress, the ceramic atomization assembly will crack, thereby affecting the service life of the atomization assembly. In addition, the process cycle is long: after the ceramic substrate is sintered, the heating film needs to be silk-screened for secondary sintering. The silk-screen printing cycle is long, the control is strict, and the cost is high. The stability of resistance is affected by the preparation process, and it is necessary to screen for appearance defects and cracks. In addition, since the heating film is made by sintering and overlapping alloy particles, it is impossible to eliminate internal microscopic defects, and the internal microstructure is unevenly distributed, which leads to poor temperature uniformity of the heating film during heating, poor stress distribution, and easy to cause local concentrated stress, which leads to further expansion of cracks and defects, and eventually failure. There is a risk of dry burning due to lack of oil during the suction process, resulting in increased resistance. Affected by the stability of resistance, it is difficult to achieve long life and high power. The heating film is above the ceramic surface, and is limited by the alloy particle size and silk screen. The film width and thickness are difficult to make thin, which makes it difficult to infiltrate the smoke oil. The heating film cannot be quickly immersed in oil, and it is easy to have dry burning and burnt smell, which is not conducive to long life and high power use. The heating film and ceramic fit tightly, the heating film is brittle and inelastic. During the thermal shock process of suction, the local stress is large, which easily causes the heating film to crack and peel off.

[0003] In traditional porous ceramic heating components, the heating element is made of metal or alloy, and its thermal expansion coefficient is generally greater than that of porous ceramics. This will cause the heating element to expand at a rate greater than that of the ceramic when it heats up, causing the heating element to warp and deform, causing the heating element to partially separate from the ceramic, and then causing the local temperature of that part to be too high due to dry burning, ultimately causing the heating element to melt. On the other hand, it will also cause a chemical reaction in the smoke liquid around the local high temperature part to produce harmful substances. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an improved atomization assembly and a manufacturing method thereof.

[0005] To solve the above technical problems, the present invention provides an atomization component, which includes a porous substrate and a heating element, wherein the porous substrate includes an atomization surface; the heating element is arranged corresponding to the atomization surface, and the thermal expansion coefficient of the porous substrate is greater than or equal to the thermal expansion coefficient of the heating element.

[0006] In some embodiments, the porous matrix material is porous diatomaceous earth; the heating element is integrally formed on the porous matrix by sintering.

[0007] In some embodiments, the heating element includes a heating portion and at least one fixing portion connected to the heating portion, and the at least one fixing portion is embedded in the porous matrix, so that the heating element is installed on the porous matrix.

[0008] In some embodiments, the at least one fixing portion includes at least one first fixing portion and at least one second fixing portion that are spaced apart; at least one fixing hole is provided on the at least one first fixing portion, and during the one-piece molding process, the porous matrix is ​​passed through the at least one fixing hole to form at least one locking column corresponding to the at least one fixing hole.

[0009] In some embodiments, the at least one first fixing portion includes a portion with a larger size away from the heat-generating portion and a portion with a smaller size close to the heat-generating portion.

[0010] In some embodiments, the at least one first fixing portion is trapezoidal in shape, wherein a short side of the trapezoid of the at least one first fixing portion is located close to the heat generating portion, and a long side of the trapezoid is located away from the heat generating portion.

[0011] In some embodiments, the at least one second fixing portion is T-shaped, and the heat-generating portion is connected to the small end of the T-shape.

[0012] In some embodiments, the heating element further includes a first electrode portion and a second electrode portion connected to both ends of the heating portion, and the first electrode portion and the second electrode portion are in the shape of rectangular sheets; the at least one first fixing portion includes four first fixing portions, which are respectively connected to the short sides of the first electrode portion and the second electrode portion, and are perpendicular to the first electrode portion and the second electrode portion, and extend toward one side of the porous matrix.

[0013] In some embodiments, the first electrode portion is provided with at least two first positioning holes; the second electrode portion is respectively provided with at least two second positioning holes; the first positioning holes and the second positioning holes serve to position the heating element in the mold cavity.

[0014] In some embodiments, the heating part includes a first welding part and a second welding part located at both ends; the at least one first fixing part and the at least one second fixing part are respectively connected to the two ends of the first welding part and the second welding part; the atomization assembly also includes two electrode leads, which are respectively electrically connected to the first welding part and the second welding part.

[0015] In some embodiments, the heating part includes a heating net; the heating net includes a heating wire, the cross section of the heating wire is trapezoidal, the long side of the trapezoid is buried in the atomization surface, and the short side of the trapezoid is slightly higher than the atomization surface or flush with the atomization surface

[0016] In some embodiments, the at least one second fixing portion is connected to the heating wire and is spaced apart on the heating wire on both sides of the porous matrix, extending in a direction perpendicular to the heating portion toward the porous matrix.

[0017] In some embodiments, the heating portion is embedded or laid flat on the atomizing surface; the porous matrix includes a liquid absorbing surface opposite to the atomizing surface, and the liquid absorbing surface is concave toward the atomizing surface to form a groove.

[0018] In some embodiments, the material used for the heating element is iron-chromium-aluminum (FeCrAl) alloy material.

[0019] An electronic atomization device comprises the above-mentioned atomization component.

[0020] A method for manufacturing the above-mentioned atomizing assembly is characterized by comprising the following steps:

[0021] Step 1: providing porous ceramic slurry and the heating element;

[0022] Step 2: forming a porous ceramic body combined with the heating element; wherein the porous ceramic body includes a surface corresponding to the atomized surface after forming; the fixing portion of the heating element is embedded in the porous ceramic body, and the heating portion cooperates with the surface corresponding to the atomized surface after forming;

[0023] Step three: The porous ceramic body is sintered at a high temperature under the conditions of a vacuum degree of (0.2~10)Pa and a temperature of 1100℃-1400℃. After sintering, the body forms the porous ceramic matrix, and the heating element is integrated into the porous ceramic matrix to form the atomization component.

[0024] In some embodiments, a step is added between step 2 and step 3: debinding and sintering the porous ceramic body in an oxygen environment at a temperature of 200° C. to 800° C. to obtain a debinded body.

[0025] Beneficial effects of the present invention:

[0026] It can effectively prevent the heating element from warping and deformation, thereby preventing it from separating from the liquid due to warping and deformation, causing dry burning, causing excessive temperature, and producing harmful gas, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the three-dimensional structure of an atomization assembly in some embodiments of the present invention;

[0028] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the atomizing assembly when the bottom is facing upward;

[0029] Figure 3 yes Figure 1 A three-dimensional exploded schematic diagram of the atomization assembly shown;

[0030] Figure 4 yes Figure 1 The schematic diagram of the cross-sectional structure of the atomizer assembly along the AA direction is shown;

[0031] Figure 5 is a schematic diagram of the three-dimensional structure of the heating element of the atomizing assembly in other embodiments of the present invention;

[0032] Figure 6 is a schematic diagram of a three-dimensional structure with the bottom of the atomizing assembly facing upward in some other embodiments of the present invention;

[0033] Figure 7 yes Figure 6 A schematic diagram of the three-dimensional exploded structure of the atomizer assembly shown;

[0034] Figure 8 is a schematic diagram of the three-dimensional structure of the heating element of the atomizing assembly in some other embodiments of the present invention;

[0035] Fig. 9 yes Figure 8 A schematic diagram of the cross-sectional structure of the heating element in the atomization assembly is shown. DETAILED DESCRIPTION

[0036] The specific structure, preparation method and implementation effect of the present invention are further described in detail and clearly and completely described in conjunction with the present embodiment and the accompanying drawings. Now refer to the accompanying drawings, in which the same reference numerals represent the same structural elements or drawing features of the present invention.

[0037] Figures 1 to 3An atomization assembly 1 in some embodiments of the present invention is shown, and the atomization assembly 1 can be used in an electronic atomization device such as an electronic cigarette to heat a liquid medium such as atomized smoke oil. The electronic atomization device 1 may include a porous ceramic substrate 10, a heating element 20, and two electrode leads 30. The porous ceramic substrate 10 is used to absorb and transmit the liquid medium. The heating element 20 is mounted on the porous ceramic substrate 10 and is used to heat the liquid medium absorbed by the atomized porous ceramic substrate 10. In some embodiments, the heating element 20 is integrally formed on the porous ceramic substrate 10 by sintering to make the combination of the two more firm and the atomization effect better. It can be understood that in some embodiments, other porous substrates can also be used to replace the porous ceramic substrate. The two electrode leads 30 are respectively welded at both ends of the heating element 20.

[0038] In some embodiments, the porous ceramic substrate 10 is roughly in the shape of a cuboid, and may include a liquid absorption surface 11 at the top and an atomization surface 12 at the bottom opposite to the liquid absorption surface 11. The liquid absorption surface 11 is used to contact the liquid medium to absorb the liquid medium into the porous ceramic substrate 10. The atomization surface 12 is used to contact the heating element 20 to allow the liquid medium in the porous ceramic substrate 10 to be heated and atomized through the atomization surface 12. It can be understood that the liquid absorption surface 11 and the atomization surface 12 are not limited to being arranged oppositely, and in some cases, the two can also be arranged adjacently.

[0039] In some embodiments, the porous ceramic substrate 10 can be made of diatomite ceramic material. Diatomite ceramics will undergo a phase transition from α-cristobalite to β-cristobalite within a certain temperature range (180°C-270°C). This phase transition causes the diatomite ceramic to have a certain deformation within a certain temperature range, that is, a certain thermal expansion coefficient. Specifically, by adjusting the content of diatomite in the diatomite ceramic, its thermal expansion coefficient can be controlled within a certain range (18~45*10 -6 / ℃). By adjusting the content of diatomite, the thermal expansion coefficient of the porous ceramic body 10 will be greater than or equal to the thermal expansion coefficient of the heating element 20, thereby preventing the alloy heating element 20 embedded in the porous ceramic body 10 from being separated from the porous ceramic body 10 due to warping deformation. The heating element 20 separated from the porous ceramic body 10 will cause dry burning due to no contact with the smoke liquid. On the one hand, this dry burning will cause the local temperature of the heating element to be too high, melting the heating element, and on the other hand, the high temperature generated by the dry burning will also cause a chemical reaction in the smoke liquid to produce harmful substances, which will enter the human body with the atomized gas and endanger human health.

[0040] In some embodiments, the liquid absorption surface 11 may be recessed toward the direction of the atomizing surface 12 to form a groove 110. The groove 110 can be used to increase the liquid absorption area on one hand, and can be used to shorten the distance between the atomizing surface 12 and the liquid absorption surface 11 on the other hand to improve the liquid transmission efficiency. In some embodiments, the atomizing surface 12 may be flat, and may include a first inlay groove 121 and a second inlay groove 122 arranged in parallel and spaced apart to respectively fix the first fixing portion 21 and the second fixing portion 22 of the heating element 20 therein. In some embodiments, the first inlay groove 121 and the second inlay groove 122 are parallel to each other in the length direction and perpendicular to the atomizing surface 12 in the depth direction. It can be understood that the first inlay groove 121 and the second inlay groove 122 are not limited to the atomizing surface.

[0041] In some embodiments, the porous ceramic substrate 10 may further include a first step 13 and a second step 14 , which are respectively disposed on two opposite sides of the porous ceramic substrate 20 to facilitate installation of the porous ceramic substrate 10 in an electronic atomization device.

[0042] In some embodiments, the heating element 20 may include a first fixing portion 21, a second fixing portion 22 and a heating element 23. The first fixing portion 21 and the second fixing portion 22 are respectively connected to the two ends of the heating element 23, and extend toward one side of the heating element 23, and are respectively used to be fixed in the first inlay groove 121 and the second inlay groove 122 on the atomization surface 12. In some embodiments, the first fixing portion 21, the second fixing portion 22 and the heating element 23 can be integrally formed by etching or stamping a metal sheet. The heating element 23 is used to be in close contact with the atomization surface 12 so that the liquid medium in the porous ceramic matrix 10 is heated and atomized through the atomization surface 12. The heating element 23 is generally bent in an S shape and arranged on a plane to form a heating network, which can make the heating element 23 evenly heated, reduce the stress unevenness caused by uneven heating of the heating element 20, and extend the life of the heating element 20, and on the other hand, make the atomization surface 12 evenly atomize the liquid medium.

[0043] In some embodiments, the heating element 20 is made of metal sheets such as nickel-chromium alloy sheets, iron-chromium-aluminum alloy sheets, stainless steel sheets, etc. Preferably, the heating element 20 can be made of iron-chromium-aluminum (FeCrAl) alloy material. The iron-chromium-aluminum (FeCrAl) alloy material can form a dense Al oxide film on its surface at a high temperature with a vacuum degree of (0.2~10Pa) to prevent the iron-chromium-aluminum (FeCrAl) alloy material from being oxidized; specifically, the surface of the heating element 20 made of the iron-chromium-aluminum (FeCrAl) alloy material is oxidized into a dense Al oxide film during the process of being integrally formed with the ceramic slurry into the above-mentioned atomization component 1. Preferably, the conditions for oxidation to a dense aluminum oxide film are: a vacuum degree of 0.2-10Pa and a temperature of 1100℃-1400℃. The dense aluminum oxide film can effectively prevent the heating element 20 from contacting and oxidizing with the smoke liquid medium, causing a chemical reaction and producing heavy metals, which are then inhaled into the human lungs along with the atomized gas during atomization, affecting human health.

[0044] The heating element 20 preferably includes an S-shaped mesh heating portion 23, which has a dense structure, and the internal microstructure is evenly distributed, the circuit is smoothly conducted, and the temperature of the mesh heating portion 23 is evenly distributed during heating without excessive concentrated stress. In addition, when the mesh heating portion 23 is made of metal, it has good toughness, will not fail due to defects and cracks, and has excellent resistance stability, and does not require appearance defects and dry-burning performance tests. The heating element 20 can be extended in life and can be used at high power, and the stable resistance is conducive to the design of circuit temperature control.

[0045] In some embodiments, since the heating element 20 is made of metal sheet, for example, by a stamping process, the process cycle is short and the cost is low: the heating element 20 and the porous ceramic substrate 10 can be easily integrated and sintered once, and the process operation is simple and the cost is low.

[0046] In some embodiments, the heating part 23 can be formed into a mesh shape by etching process, and the film width and thickness can be thin and fine. In the preparation process, the heating part 23 can be embedded in the porous ceramic matrix 10, that is, the plane of the heating part 23 of the heating element 20 is roughly flush with the atomization surface of the porous ceramic matrix 10 or slightly buried in the atomization surface, but does not affect the atomization, and can be quickly soaked with liquid media such as tobacco oil. When used in electronic cigarettes, it can achieve a fast oil supply effect, improve tobacco oil matching, high flavor restoration, and achieve long life and high power.

[0047] In some embodiments, the metal heating element 20 is embedded in the porous ceramic matrix 10 and is well bonded to the porous ceramic matrix 10. After the heating element 20 is arranged in a mesh shape, it has elasticity, and the stress is easily released during the thermal shock of the extraction, and it is not easy to peel off the film.

[0048] In some embodiments, the heating element 20 is integrally formed in the porous ceramic substrate 10, and the heating portion 23 thereof is closely attached to the atomizing surface 12 (i.e., laid flat on the atomizing surface 12). In some embodiments, the first fixing portion 21 and the second fixing portion 22 are rectangular sheets, embedded in the porous ceramic substrate 10, and are respectively provided with a plurality of first fixing holes 210 and second fixing holes 220. Figure 4 , the first fixing hole 210 and the second fixing hole 220 can be used for the material of the porous ceramic matrix 10 to pass through during the molding process to form a locking column (not numbered) located in the first inlay groove 121 and the second inlay groove 122, and the first fixing part 21 and the second fixing part 22 are locked in the porous ceramic matrix 10, so that the heating element 20 and the porous ceramic matrix 10 are more firmly formed after being integrally molded. In some embodiments, the first fixing part 21 and the second fixing part 22 are respectively perpendicular to the plane where the heating part 23 is located. In some examples, the heating part 23 may also include a first welding part 231 and a second welding part 232, and the first welding part 231 is respectively located at both ends of the heating part 23, and is respectively connected to the first fixing part 21 and the second fixing part. In some examples, the first welding part 231 and the second welding part 232 are square, and their width is greater than the width of the heating wire in the middle of the heating part 23. The two electrode leads 30 are respectively welded to the first welding part 231 and the second welding part 231 to electrically connect the positive and negative electrodes of the power supply. In some embodiments, the first welding portion 231 and the second welding portion 232 may be a first electrode portion and a second electrode portion, respectively, the first electrode portion is a positive electrode or a negative electrode portion, and the second electrode portion is a negative electrode or a positive electrode portion. The first electrode portion and the second electrode portion replace the electrode lead as the positive and / or negative electrode. In some examples, the heating element 20 further includes a third fixing portion (not shown) located on the heating element 23, which is used to prevent the heating element 20 from warping and deforming and detaching from the atomizing surface.

[0049] The atomizing assembly 1 may be manufactured in the following steps: Step 1: providing porous ceramic slurry and forming the heating element 20 by etching.

[0050] Step 2: Place the first fixing portion 21 and the second fixing portion 22 of the heating element 20 at preset positions in the mold cavity to be molded.

[0051] Step 3: Inject the ceramic slurry into the molding cavity where the heating element 20 has been placed, and wait for the ceramic slurry to harden and form, and the hardened ceramic slurry forms the body of the porous matrix 10. The first fixing portion 21 and the second fixing portion 22 of the heating element 20 are respectively embedded in the porous matrix 10 body, and the porous matrix material passes through the first fixing hole 210 and the second fixing hole 220.

[0052] Step 4: Take the green body with the heating element 20 out of the molding cavity and perform high-temperature sintering. After sintering, the green body forms a porous ceramic matrix 10, and the heating element 20 is integrated into the porous ceramic matrix 10 to form the above-mentioned atomization component 1.

[0053] In some embodiments, the material used for the heating element 20 prepared in the above step one may be a metal material that heats up quickly and generates heat evenly, for example, one of the materials selected from nickel-chromium alloy, iron-chromium-aluminum alloy, stainless steel, pure nickel, titanium, nickel-iron, etc.; in some embodiments, the material used for the heating element 20 in the above step one is iron-aluminum-chromium (FeCrAl) alloy material.

[0054] In some embodiments, in the above step 2, the heating element is placed in corresponding positioning posts in the mold cavity through two first positioning holes and two second positioning holes for positioning.

[0055] In some embodiments, the heating element 20 is an integral metal part, which can be integrally formed by using one or more of laser segmentation technology, stamping technology or etching technology, or the parts of the heating element 20 can be made in batches and then bonded by welding or other bonding technology.

[0056] In some embodiments, in step 2, a heating element 20 that heats up rapidly and evenly is placed in a molding cavity, and molten and evenly stirred ceramic slurry is poured into the cavity where the heating element 20 is placed at a preset position.

[0057] In some examples, before the high-temperature sintering in step 4 above, an additional step is added: taking out the hardened ceramic slurry to obtain a ceramic heating element blank, debinding and sintering the ceramic heating element blank in an aerobic environment, and gasifying the forming agent at high temperature to obtain a debonded blank. Preferably, the sintering temperature is set to 200°C-800°C.

[0058] In some embodiments, the high temperature sintering in the above step four adopts vacuum high temperature sintering, and the preferred sintering vacuum degree is (0.2~10)Pa. The high temperature sintering in the above vacuum degree (0.2~10)Pa environment can form a dense oxide film on the heating element 20 of the alloy material formed on the porous ceramic substrate 10, especially the heating element 20 made of FeCrAl alloy material, which has a better density effect. The dense oxide film can effectively prevent the heating element 20 from chemically reacting with liquids such as tobacco oil, resulting in the precipitation of heavy metals, and entering the human lungs with the atomized gas, affecting human health.

[0059] In some embodiments, the high temperature sintering temperature in the above step 4 is 1100°C-1400°C.

[0060] Figure 5The heating element 20a of the atomizing assembly in some other embodiments of the present invention is shown. The heating element 20a may include a first fixing portion 21a, a second fixing portion 22a and a heating portion 23a in some embodiments. The first fixing portion 21a and the second fixing portion 22a are respectively connected to the two ends of the heating portion 23a and extend toward one side of the heating portion 23a.

[0061] The heating portion 23a is bent in an S-shape and is not fixed tightly against the atomizing surface 12. In this way, the heating portion 23a has room to move during thermal expansion and contraction, reducing its tensile stress, thereby extending the life of the heating element 20a. In some embodiments, the first fixing portion 21a and the second fixing portion 22a are rectangular sheets, and are respectively provided with a plurality of first fixing holes 210a and second fixing holes 220a. Figure 4 The first fixing hole 210a and the first fixing hole 220a can be used for the material of the porous ceramic matrix 10 to pass through during the molding process, so that the heating element 20a and the porous ceramic matrix 10 are more firmly formed after being integrally molded. In some embodiments, the first fixing portion 21a and the second fixing portion 22a are respectively perpendicular to the plane where the heating portion 23a is located.

[0062] In some examples, the heating portion 23a may further include a first welding portion 231a and a second welding portion 232a, wherein the first welding portion 231 is connected and fixed between the first fixing portion 21a and the heating portion 23a, and the second welding portion 232a is connected and fixed between the second fixing portion 22a and the heating portion 23a, and is used to connect the heating portion 23a with the first fixing portion 21a and the second fixing portion 22a, respectively, and generate heat together with the heating portion 23a, so that the liquid medium in the porous ceramic matrix 10 is heated and atomized through the atomization surface 12. In some examples, the first welding portion 231a and the second welding portion 232a are rectangular, and their areas are substantially the same as those of the fixing portion, and are used to firmly fix the heating element thereto and prevent it from breaking easily.

[0063] In some examples, the heating element 20a may further include two electrode leads 30a, which are respectively disposed on the first welding portion 231a and the second welding portion 231a and are respectively perpendicular to the first welding portion 231a and the second welding portion 232a, and are respectively used to electrically connect the positive and negative electrodes of the power supply.

[0064] In some embodiments, the first fixing portion 21a and the second fixing portion 22a of the heating element 20a may be in a trapezoidal shape, wherein the short sides of the trapezoids are located near the heating portion 23a, and the long sides of the trapezoids are located away from the heating portion 23a, that is, the first fixing portion 21a and the second fixing portion 22a include a larger portion away from the heating portion 23a and a smaller portion close to the heating portion 23a. This structural setting makes it less likely for the first fixing portion 21a and the second fixing portion 22a to fall off when they are integrally embedded in the porous matrix.

[0065] Figure 6 and Figure 7 The atomization assembly 1b in some other embodiments of the present invention is shown. The electronic atomization device 1b may also include a porous ceramic substrate 10b and a heating element 20b. The heating element 20b may be integrally formed on the porous ceramic substrate 10b by sintering. The heating element 20b may include a first fixing portion 21b, a second fixing portion 22b and a heating portion 23b. The first fixing portion 21b and the second fixing portion 22b are respectively connected to the two ends of the heating portion 23b and extend toward one side of the heating portion 23b. The porous ceramic substrate 10b includes an atomization surface 12b, and a first inlay groove 121b, a second inlay groove 122b and a third inlay groove 123b are formed on the atomization surface 12b. The heating element 20b, the first fixing portion 21b, the second fixing portion 22b and the heating portion 23b are respectively embedded in the first inlay groove 121b, the second inlay groove 122b and the third inlay groove 123b. As shown in the figure, the depth of the third embedding groove 123b is equal to the thickness of the heating portion 23b, so that when the heating portion 23b is embedded therein, the outer surface of the heating portion 23b is flush with the atomizing surface 12b. It can be understood that in some embodiments, the depth of the third embedding groove 123b can also be made less than or greater than the thickness of the heating portion 23b to meet different needs. In some embodiments, a plurality of first fixing holes 210b and a plurality of second fixing holes 220b are respectively provided on the first fixing portion 21b and the second fixing portion 22b.

[0066] Figure 8 and Fig. 9 The heating element 20c of the atomization assembly in some other embodiments of the present invention is shown. In some embodiments, the heating element 20c may include a heating portion 23c and a first electrode portion 24c and a second electrode portion 25c connected to both ends of the heating portion. The heating portion 23c is bent roughly in an S shape and is not fixed tightly against the atomization surface 12c. In this way, the heating portion 23c has room for movement during thermal expansion and contraction, reducing its tensile stress, thereby extending the life of the heating element 20c. The first electrode portion 24c and the second electrode portion 25c are respectively connected to both ends of the heating portion 23c, that is, connected to the two free ends of the S-shaped heating portion 23c.

[0067] In some embodiments, the line width of the heating portion 23c connected between the first electrode portion 24c and the second electrode portion 25c gradually increases from the connection between the first electrode and the second electrode to the center of the heating portion, so as to balance the temperature of the entire heating portion 23c and ensure the temperature uniformity of the entire heating part.

[0068] In some embodiments, the cross section of the heating wire of the heating part 23c is in a trapezoidal shape, that is, the surface of the heating part 23c that contacts or is buried in one end of the atomizing surface 12c is a surface with a larger area (the surface where the long side of the cross-sectional trapezoid is located), and the surface of the heating part opposite to the atomizing surface 12c is a surface with a smaller area (the surface where the short side of the cross-sectional trapezoid is located). The trapezoidal cross-sectional setting is conducive to oil climbing on the one hand, and on the other hand, it can improve the embedding degree of the heating part 23c itself and the porous ceramic matrix 10c, and avoid the heating part from warping. The cross-sectional shape of the heating wire of the heating part 23c is not limited to a trapezoid, and can also be a semi-cylindrical shape or other shapes that follow the different areas of the upper and lower surfaces.

[0069] In some embodiments, the first electrode portion 24c and the second electrode portion 25c are in the form of rectangular sheets, and are respectively provided with a plurality of first positioning holes 240c and second positioning holes 250c, which are used to be inserted into corresponding positioning columns in the mold cavity during the one-piece molding process to prevent the heating element from shifting under the impact of the ceramic slurry.

[0070] In some embodiments, the heating element 20c may further include a plurality of first fixing portions 21c and a plurality of second fixing portions 22c. The plurality of first fixing portions 21c are respectively located on opposite sides of the two short sides of the first electrode portion 24c and on opposite sides of the two short sides of the second electrode portion 25c, and extend toward one side of the heating element 23c, and are used to be integrally formed in the porous ceramic body to fix the heating element 20c. In some embodiments, the plurality of first fixing portions 21c and the plurality of second fixing portions 22c may also be respectively located at one end of the long sides of the first electrode portion 24c and the second electrode portion 25c away from the heating element 23c, and the plurality of second fixing portions 22c are respectively connected to the side edges of the heating element 23c, and extend toward one side of the heating element 23c, and are used to be integrally formed in the porous ceramic body to fix the heating element 20c. In some embodiments, as Figure 8 As shown, the second fixing portion 22c is T-shaped, and one end connected to the heating portion 23c is the lower end of the T-shape, which is beneficial to fix the heating element 20c on the one hand, and reduces heat loss on the other hand.

[0071] In some embodiments, the first fixing portion 21c may include a plurality of first fixing holes 210c disposed thereon. The first fixing holes 210c may be used to allow the material of the porous ceramic matrix 10 to pass therethrough during the molding process, thereby making the heating element 20c and the porous ceramic matrix 10c more secure after being integrally molded. In some embodiments, the first fixing portion 21c is trapezoidal in shape, with the short side of the trapezoid located near the heating portion 23c, and the long side of the trapezoid located away from the heating portion 23c, that is, the first fixing portion 21c includes a larger portion away from the heating portion 23c and a smaller portion close to the heating portion 23c. The arrangement of this structure makes it less likely for the first fixing portion 21c to fall off when it is integrally embedded in the porous matrix.

[0072] In some embodiments, the first fixing portion 21c and the second fixing portion 22c are respectively perpendicular to the plane where the heating portion 23c is located.

[0073] The above disclosures are only some specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An atomizing assembly, comprising a porous substrate and a heating element, wherein the porous substrate comprises an atomizing surface, and the heating element is arranged corresponding to the atomizing surface. Features: The thermal expansion coefficient of the porous matrix is ​​greater than or equal to the thermal expansion coefficient of the heating element; The heating element is integrally formed on the porous substrate by sintering; The heating element comprises a heating portion and at least one fixing portion connected to the heating portion, wherein the at least one fixing portion is embedded in the porous matrix; The at least one fixing portion includes at least one first fixing portion and at least one second fixing portion which are spaced apart from each other; at least one fixing hole is provided on the at least one first fixing portion, and during the one-piece molding process, the porous matrix is ​​passed through the at least one fixing hole to form at least one locking column corresponding to the at least one fixing hole.

2. The atomizing assembly according to claim 1, Features: The porous matrix material is porous diatomaceous earth.

3. The atomizer assembly according to claim 1, Features: The at least one first fixing portion includes a portion with a larger size away from the heat generating portion and a portion with a smaller size close to the heat generating portion.

4. The atomizing assembly according to claim 3, Features: The at least one first fixing portion is in a trapezoidal shape, wherein a short side of the trapezoid of the at least one first fixing portion is located close to the heat generating portion, and a long side of the trapezoid is located away from the heat generating portion.

5. The atomizing assembly according to claim 4, Features: The at least one second fixing portion is T-shaped, and the heating portion is connected to the small end of the T-shape.

6. The atomizing assembly according to claim 5, It is characterized in that The heating element also includes a first electrode portion and a second electrode portion connected to both ends of the heating portion, and the first electrode portion and the second electrode portion are in the shape of rectangular sheets; the at least one first fixing portion includes four first fixing portions, which are respectively connected to the short sides of the first electrode portion and the second electrode portion, and are perpendicular to the first electrode portion and the second electrode portion, and extend toward one side of the porous matrix.

7. The atomizing assembly according to claim 6, It is characterized in that The first electrode portion is provided with at least two first positioning holes; the second electrode portion is provided with at least two second positioning holes; the first positioning holes and the second positioning holes play a role in positioning the heating element in the mold cavity.

8. The atomizing assembly according to claim 1, Features: The heating part includes a first welding part and a second welding part located at both ends; the at least one first fixing part and the at least one second fixing part are respectively connected to the two ends of the first welding part and the second welding part; the atomization assembly also includes two electrode leads, which are respectively electrically connected to the first welding part and the second welding part.

9. The atomizer assembly according to any one of claims 1 to 8, Features: The heating part comprises a heating net; the heating net comprises a heating wire, the cross section of the heating wire is trapezoidal, the long side of the trapezoid is buried in the atomizing surface, and the short side of the trapezoid is slightly higher than the atomizing surface or flush with the atomizing surface.

10. The atomizing assembly according to claim 9, It is characterized in that The at least one second fixing portion is connected to the heating wire and is disposed at intervals on the heating wire located on both sides of the porous matrix, extending in a direction perpendicular to the heating portion and toward the porous matrix.

11. The atomizer assembly according to claim 10, Features: The heating part is embedded or laid flat on the atomizing surface; the porous matrix includes a liquid absorbing surface opposite to the atomizing surface, and the liquid absorbing surface is concave toward the atomizing surface to form a groove.

12. The atomizer assembly according to claim 11, Features: The material used for the heating element is iron-chromium-aluminum (FeCrAl) alloy material.

13. An electronic atomization device, It is characterized in that Comprising the atomization assembly according to any one of claims 1 to 12.

14. A method for manufacturing the atomizer assembly according to any one of claims 1 to 12, Features: The following steps are involved: Step 1: providing porous ceramic slurry and the heating element; Step 2: forming a porous ceramic body combined with the heating element; wherein the porous ceramic body includes a surface corresponding to the atomized surface after forming; the fixing portion of the heating element is embedded in the porous ceramic body, and the heating portion cooperates with the surface corresponding to the atomized surface after forming; Step three: sintering the porous ceramic body at a vacuum degree of (0.2-10) Pa and a temperature of 1100-1400°C. After sintering, the body forms the porous ceramic matrix, and the heating element is integrated into the porous ceramic matrix to form the atomization component.

15. The method for manufacturing the atomizer assembly according to claim 14, It is characterized in that An additional step is added between step 2 and step 3: debinding and sintering the porous ceramic body in an oxygen environment at a temperature of 200° C. to 800° C. to obtain a debinded body.

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