Heating assembly and electronic atomization device
By setting electrode layers at both ends of the heating element along its axial direction and adopting a hollow cavity structure, the problem of insufficient mechanical strength of the heating element is solved, achieving high mechanical strength and rapid heating.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SMOORE INTERNATIONAL HOLDINGS LIMITED
- Filing Date
- 2022-11-09
- Publication Date
- 2026-05-15
AI Technical Summary
Existing heating elements have low mechanical strength and are prone to breakage, especially those with grooves extending through the thickness direction, which result in insufficient mechanical strength.
A first electrode layer and a second electrode layer are respectively set at both ends of the heating element to form a straight current path, avoiding the need to open grooves that penetrate the thickness direction. Combined with the hollow cavity structure and insulation layer design, the mechanical strength is improved.
The mechanical strength of the heating element has been improved, reducing the risk of breakage, while also reducing energy consumption and increasing the heating rate, thus improving the consumer experience.
Smart Images
Figure CN115736365B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of atomization technology, and in particular to heating components and electronic atomization devices. Background Technology
[0002] Aerosols are colloidal dispersion systems formed by the dispersion and suspension of solid or liquid particles in a gaseous medium. Since aerosols can be absorbed by the human body through the respiratory system, they provide users with a new alternative absorption method. For example, atomizing devices that generate aerosols by baking and heating the aerosol-generating matrix of herbal or ointment can be applied in different fields to deliver inhalable aerosols to users, replacing conventional product forms and absorption methods.
[0003] Generally, aerosol matrix is atomized into aerosol through a heating element in an electronic atomization device. In related technologies, an integrated heating element can conduct electricity and generate heat to heat the atomized aerosol, and grooves are opened on the heating element to form a current that makes the heating element heat up. However, the grooves opened directly on the heating element are set through the thickness direction of the heating element, which makes the mechanical strength of the heating element low and the heating element easy to break. Summary of the Invention
[0004] Therefore, it is necessary to provide a heating component and an electronic atomization device to address the problem of low mechanical strength of the heating element.
[0005] A heating component includes a heating element, a first electrode layer, and a second electrode layer. The first electrode layer is at least partially disposed on the outer peripheral surface of one axial end of the heating element, and the second electrode layer is at least partially disposed on the outer peripheral surface of the other axial end of the heating element.
[0006] The heating element is a conductor, and it is capable of electrically connecting the first electrode layer and the second electrode layer.
[0007] In the aforementioned heating assembly, the heating element itself acts as a conductor, generating heat when energized to heat and atomize the aerosol matrix mounted on it. Furthermore, a first electrode layer and a second electrode layer are respectively provided at opposite ends of the heating element's axial direction to serve as electrical connections between the positive and negative electrodes. When the first and second electrode layers are connected to the circuit and energized, a current flows along the heating element's axial direction from one of the first and second electrode layers to the other. By providing a first and second electrode layer at opposite ends of the heating element's axial direction to form a straight current path, a U-shaped current path is not required, unlike traditional heating elements that require grooves penetrating the thickness direction to form a U-shaped current path. This results in better mechanical strength for the heating element, making it less prone to breakage.
[0008] In one embodiment, the heating element has a hollow cavity formed inside along its own axial direction.
[0009] In one embodiment, the heating element includes an open end and a closed end disposed opposite to each other along its own axial direction, the open end having an opening communicating with the hollow cavity;
[0010] At least a portion of one of the first electrode layer and the second electrode layer is disposed on the outer peripheral surface of the open end, and at least a portion of the other is disposed on the outer peripheral surface of the closed end.
[0011] In one embodiment, the first electrode layer is disposed on the outer peripheral surface of the open end, and the second electrode layer includes a first segment and a second segment arranged along the axial direction of the heating element and connected to each other. The first segment is disposed on the outer peripheral surface of the closed end, and the second segment extends toward the side where the open end is located.
[0012] In one embodiment, the heating component further includes an insulating layer disposed on the side of the second segment facing the heating element.
[0013] In one embodiment, the heating element includes an intermediate portion connected between the open end and the closed end, an insulating layer disposed outside the intermediate portion and a portion of the first electrode layer, and a second segment disposed outside the insulating layer and extending above the first electrode layer.
[0014] In one embodiment, the heating element is configured as a rod-shaped structure, and the closed end is configured as a sharp structure.
[0015] In one embodiment, the heating component further includes a first electrode and a second electrode, both of which are disposed at the opening end and connected to the first electrode layer and the second electrode layer, respectively.
[0016] In one embodiment, the heating component further includes a mounting member that is fitted around the outer periphery of the opening end.
[0017] In one embodiment, the heating element comprises ceramic material and metal material, wherein the volume percentage of the metal material is 30%-65% and the volume percentage of the ceramic material is 35%-75%.
[0018] In one embodiment, the metallic material includes at least one selected from nickel, iron, cobalt, copper, titanium, aluminum, and stainless steel; and / or
[0019] The ceramic material includes at least one of alumina, zirconium oxide, silicon oxide, yttrium oxide, lanthanum oxide, cerium oxide, magnesium oxide, manganese oxide, and titanium oxide.
[0020] In one embodiment, the resistivity of the heating element is in the range of 4 × 10⁻⁶.-6 Ω·m-8×10 -4 Ω·m.
[0021] In one embodiment, the temperature coefficient of resistance of the heating element is greater than 600 ppm / ℃.
[0022] An electronic atomizing device includes the aforementioned heating component. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the heating component in one embodiment of this application.
[0024] Explanation of reference numerals in the attached drawings: 100, heating element; 10, heating component; 12, open end; 14, middle part; 16, closed end; 20, hollow cavity; 30, first electrode layer; 50, second electrode layer; 52, first section; 54, second section; 70, insulating layer; 82, first electrode; 84, second electrode. Detailed Implementation
[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0031] See Figure 1 In one embodiment of this application, a heating component 100 is provided, including a heating element 10, a first electrode layer 30, and a second electrode layer 50. The first electrode layer 30 is at least partially disposed on the outer peripheral surface of one axial end of the heating element 10, and the second electrode layer 50 is at least partially disposed on the outer peripheral surface of the other axial end of the heating element 10. The heating element 10 is a conductive element, and the heating element 10 is capable of electrically conducting the first electrode layer 30 and the second electrode layer 50 to form a current flowing along its own axial direction from one of the first electrode layer 30 and the second electrode layer 50 to the other inside the heating element 10.
[0032] In this way, the heating element 10 itself acts as a conductive element, generating heat when energized to heat the atomized aerosol matrix mounted on it. Furthermore, a first electrode layer 30 and a second electrode layer 50 are respectively provided at opposite ends of the heating element 10 along its axial direction to serve as electrical connections between the positive and negative electrodes. When the first electrode layer 30 and the second electrode layer 50 are connected to the circuit and energized, a current can be formed on the heating element 10 flowing from one of the first electrode layer 30 to the other along its axial direction. By providing the first electrode layer 30 and the second electrode layer 50 at opposite ends of the heating element 10 along its axial direction, a straight current path is formed, eliminating the need for a U-shaped current path formed by creating a groove penetrating the thickness direction, as is common in conventional heating elements 10. This results in better mechanical strength for the heating element 10, making it less prone to breakage.
[0033] In some embodiments, a hollow cavity 20 is formed inside the heating element 10 along its own axial direction. This hollow design of the heating element 10 reduces its cross-sectional area, thereby reducing the energy consumption of the heating element 10 during operation. Furthermore, the hollow structure can significantly reduce the heat melting of the heating part, thereby significantly improving the heating rate, reducing waiting time, and thus improving the consumer experience.
[0034] Furthermore, the heating element 10 includes an open end 12 and a closed end 16 disposed opposite to each other along its own axial direction. The open end 12 has an opening that communicates with the hollow cavity 20. When the hollow cavity 20 is formed inside the heating element 10, an opening is made from the side where the open end 12 is located, forming an opening at the open end 12 that communicates with the hollow cavity 20. The end of the heating element 10 opposite to the open end 12 along the axial direction is the closed end 16, that is, the hollow cavity 20 is not opened through the heating element 10 along the axial direction, and the closed end 16 does not have an opening, allowing the aerosol generating matrix to be inserted into the heating element 10 through the closed end 16. Additionally, at least one of the first electrode layer 30 and the second electrode layer 50 is disposed on the outer peripheral surface of the open end 12, and at least part of the other is disposed on the outer peripheral surface of the closed end 16, so that the first electrode layer 30 and the second electrode layer 50 are respectively disposed at both ends of the heating element 10 along the axial direction, thereby forming an axially flowing current on the heating element 10.
[0035] In addition, the depth of the hollow cavity 20 can affect the temperature field distribution of the heating element 10. For example, the shallower the depth of the hollow cavity 20, the closer the temperature field distribution is to the open end 12, and the deeper the depth of the hollow cavity 20, the closer the temperature field distribution is to the closed end 16.
[0036] Furthermore, the first electrode layer 30 is disposed on the outer peripheral surface of the open end 12, and the second electrode layer 50 includes a first segment 52 and a second segment 54 arranged along the axial direction of the heating element 10 and connected to each other. The first segment 52 is disposed on the outer peripheral surface of the closed end 16, and the second segment 54 extends toward the side where the open end 12 is located. In this way, the first electrode layer 30 is disposed on the open end 12, and the second electrode layer 50 is disposed on the closed end 16 and electrically connected to the closed end 16. The second electrode layer 50 extends toward the side where the open end 12 is located. Thus, both the positive and negative electrodes are connected to the first electrode layer 30 and the second electrode layer 50 from the side where the open end 12 is located, which facilitates installation and circuit connection.
[0037] Optionally, both the first electrode layer 30 and the second electrode layer 50 are annular layers surrounding the entire outer periphery of the heating element 10, which enables the heating element 10 to be uniformly energized and heated in its circumferential direction.
[0038] In some embodiments, the heating component 100 further includes an insulating layer 70 disposed on the side of the second segment 54 facing the heating element 10. The second electrode layer 50 includes a first segment 52 and a second segment 54. The first segment 52 is electrically connected to the closed end 16, and the second electrode layer 50 is guided to the side of the open end 12 via the second segment 54. This facilitates the simultaneous placement of electrodes for both the first electrode layer 30 and the second electrode layer 50 from the side of the open end 12, making it convenient to connect the first electrode layer 30 and the second electrode layer 50 into the circuit. Furthermore, the insulating layer 70 on the side of the second segment 54 facing the heating element 10 prevents the second segment 54 from conducting with the bottom heating element 10 or the first electrode layer 30 during its extension towards the open end 12, ensuring that current flows along the axial direction of the heating element 10 within it.
[0039] Furthermore, the heating element 10 includes an intermediate portion 14 connecting the open end 12 and the closed end 16. An insulating layer 70 is disposed outside the intermediate portion 14 and a portion of the first electrode layer 30. A second segment 54 is disposed outside the insulating layer 70 and extends above the first electrode layer 30. Thus, the insulating layer 70 is disposed on the side of the second segment 54 facing the heating element 10 to prevent short circuits between the second segment 54 and the intermediate portion 14 and the first electrode layer 30. Also, the second segment 54 extending above the first electrode layer 30 facilitates subsequent electrode connections. Optionally, the insulating layer 70 extends beyond the second segment 54 in a direction closer to the open end 12 to ensure the insulating effect of the insulating layer 70 on the second segment 54.
[0040] In some embodiments, the heating element 10 is configured as a rod-shaped structure, and the closed end 16 is configured as a sharp structure to facilitate the insertion of the aerosol generation matrix into the heating element through the closed end 16. Specifically, the first segment 52 of the second electrode layer 50 covers the sharp closed end 16.
[0041] In some embodiments, the heating element 100 further includes a first electrode 82 and a second electrode 84, both disposed at the opening end 12 and connected to the first electrode layer 30 and the second electrode layer 50 respectively, so that the first electrode layer 30 and the second electrode layer 50 are connected to the circuit by the first electrode 82 and the second electrode layer 84 respectively, to supply power to the heating element 10. Optionally, the first electrode layer 30 and the second electrode layer 50 are both conductive layers, so as to be electrically connected to the first electrode 82 and the second electrode 84 respectively.
[0042] In some embodiments, the heating component 100 further includes a mounting member, which is sleeved on the outer periphery of the open end 12, so as to use the mounting member as the mounting base for the heating component 100 to install the heating component 100 in the electronic atomizing device.
[0043] In some embodiments, the heating element 10 comprises ceramic and metallic materials. The volume percentage of the metallic material in the heating element 10 is 30%-65%, and the volume percentage of the ceramic material is 35%-75%. The metallic material acts as a conductor, exhibiting low resistivity and a high temperature coefficient of resistance (TCR), while the ceramic material regulates resistance and enhances strength. Furthermore, the metallic and ceramic phases exhibit good high-temperature chemical compatibility and high sintering activity, allowing for densification sintering of the cermet at atmospheric pressure and relatively low sintering temperatures. During the entire sintering process, no chemical reaction or high-temperature chemical diffusion occurs between the metallic and ceramic phases. Therefore, the resistivity of the heating element 10 made of cermet is strongly correlated with the volume ratio between the metallic and ceramic phases. The resistivity of the heating element 10 can be adjusted by regulating the volume ratio of the metallic to the ceramic phases, thereby meeting different heating requirements.
[0044] In addition, metal materials have high toughness, so the metal-ceramic heating element 10 combines the toughness of metal and the high strength of ceramic in terms of mechanical properties, which makes the heating element 10 have very high mechanical strength and high fracture resistance.
[0045] Furthermore, the metallic material includes at least one of nickel, iron, cobalt, copper, titanium, aluminum, and stainless steel, and / or the ceramic material includes at least one of alumina, zirconium oxide, silicon oxide, yttrium oxide, lanthanum oxide, cerium oxide, magnesium oxide, manganese oxide, and titanium oxide. The raw materials for the heating element 10 are widely available and inexpensive, resulting in low material costs. In addition, due to its high sintering activity and good processing performance, the process for preparing the metal-ceramic heating element 10 is simple, and the manufacturing cost is also low.
[0046] Optionally, appropriate types and amounts of elements can be selected to dope and replace ceramic materials, with the aim of appropriately improving the structural stability of the ceramic phase and enhancing its mechanical properties. For example, doping zirconium oxide with yttrium can improve the phase structural stability of zirconium oxide, while doping alumina with zirconium can improve the toughness of alumina. Understandably, the type and amount of doping elements are set according to requirements and are not limited here.
[0047] In some embodiments, the resistivity of the heating element 10 is in the range of 4 × 10⁻⁶. -6 Ω·m-8×10 -4 With a resistivity of Ω·m, it fills the gap in the application range of conventional heating resistors, meets the resistivity requirements of 100 for heating components in electronic atomization devices, and can realize heating and self-temperature control functions.
[0048] Furthermore, the temperature coefficient of resistance of the heating element 10 is greater than 600ppm / ℃, which means that the temperature coefficient of resistance of the heating element 10 is relatively large, enabling precise temperature control and improving the atomization effect.
[0049] For the heating element 100 in any of the above embodiments, the specific preparation method includes the following steps: (1) Mixing: Mix the metal material, ceramic material and the mixing agent uniformly according to the required proportion; (2) Molding: Prepare the blank by injection molding, or by extrusion or dry pressing; (3) Sintering: Place the shaped blank in an atmosphere furnace or vacuum furnace for debinding and sintering; (4) Finishing of sintered body: Perform simple machining and finishing on the sintered metal-ceramic heating element 10 to form a quasi-hollow cylinder with an outer diameter that meets the requirements (one end is not connected and is used to process the needle tip); (5) Prepare an insulating coating and a quasi-hollow cylinder on the outer surface according to the arrangement of the positive and negative electrodes. The electrode layer is further sharpened to align with the hollow cylinder. Specifically, the first electrode layer 30 is first coated on the outer surface of the open end 12 of the quasi-hollow cylinder, and the insulating layer 70 is coated on the middle part 14 and the closed end 16 of the quasi-hollow cylinder. Then, the closed end 16 of the quasi-hollow cylinder is sharpened, and the insulating layer 70 of the closed end 16 is removed. Finally, the second electrode layer 50 is coated on the sharpened closed end 16 and the insulating layer 70 to complete the coating of the insulating layer 70 and the electrode layer; (6) Preparation of positive and negative electrodes and mounting parts: Electrodes and mounting parts are prepared by brazing in an atmosphere furnace or a vacuum furnace; (7) Preparation of glaze layer: A protective glaze layer is prepared by sintering on the surface of the heating needle in an atmosphere furnace or a vacuum furnace. Depending on the specific situation, the mounting parts can also be completed after the glaze layer preparation is completed.
[0050] It is understood that the heating element 100 prepared by the above preparation method has a resistivity of 4×10-6Ω·m to 8×10-4Ω·m and a resistance temperature coefficient greater than 600ppm / ℃.
[0051] The following examples illustrate the above preparation method from the aspects of the volume ratio of metal and ceramic materials, the selection of material composition of metal and ceramic materials, the particle size of metal and ceramic materials, and the vacuum degree and temperature of sintering.
[0052] Example 1:
[0053] 1) Mix 35% by volume of 430L stainless steel powder (metal material) with a particle size of -10μm and 65% by volume of zirconium oxide powder (ceramic material) with a particle size of -1μm, then add an appropriate amount of dispersant triethanolamine (TEA), and wet mill in a ball mill for 40h to obtain mixed powder.
[0054] 2) Place the mixture in a vacuum drying oven at 60℃ to dry;
[0055] 3) Add 3.0% by mass of PVB solution to the dried mixture as a molding binder, and mix thoroughly;
[0056] 4) Pour the above mixture into a mortar and grind it evenly to form granulated powder;
[0057] 5) Pour the above granulated powder into a dry pressing mold and press the powder into the target shape under a molding pressure of 200MPa;
[0058] 6) Place the formed green body in a vacuum drying oven at 60°C and dry for 4 hours;
[0059] 7) Place the dried green body into a vacuum furnace for sintering. The vacuum degree is 10-3 Pa, the sintering temperature is 1350℃, and the sintering time is 120 min.
[0060] 8) The above sintered body is simply machined by a centerless mill to obtain a quasi-hollow cylinder (one end is not connected, used to machine the sharp closed end 16), so that its outer diameter meets the requirements.
[0061] 9) A first electrode layer 30 is prepared on the outer surface of the quasi-hollow cylinder with an open end using the "immersion coating-vacuum sintering" method, and an insulating coating is prepared on the first electrode layer 30.
[0062] 10) The end of the cylinder away from the opening is sharpened, and a second electrode layer 50 is further prepared on the outer surface of the heating element 10. One end of the second electrode layer 50 is connected to the heating element 10 through the closed end 16, and the other end extends toward the side where the opening is located and is above the insulating layer 70, but does not exceed the insulating layer 70.
[0063] 11) The electrodes and mounting parts are brazed together in an atmosphere furnace or a vacuum furnace, and the first electrode 82 and the second electrode 84 are respectively connected to the first electrode layer 30 and the second electrode layer 50.
[0064] 12) Glaze preparation; a protective glaze layer is prepared by sintering on the surface of the heating element 10 in an atmosphere furnace or a vacuum furnace. Depending on the specific circumstances, the mounting component may also be installed and fixed after the glaze layer preparation is completed.
[0065] The heating element 10 prepared according to the above process has a resistance of 0.8Ω and a temperature coefficient of resistance (TCR) of 1320ppm / ℃.
[0066] Example 2
[0067] 1) Mix 316L stainless steel powder (metallic material) with a particle size of -10μm at a volume percentage of 35% and zirconium oxide powder (ceramic material) with a particle size of -1μm at a volume percentage of 65%, then add an appropriate amount of dispersant triethanolamine (TEA), and wet mill in a ball mill for 40h to obtain mixed powder.
[0068] 2) Place the mixture in a vacuum drying oven at 60℃ to dry;
[0069] 3) Add 3.0% by weight of paraffin molding binder to the dried mixture and stir thoroughly.
[0070] 4) The above mixture is pressed into the target shape using an injection molding machine under a molding pressure of 10MPa, and then demolded;
[0071] 5) Soak the unmolded green body in paraffin extract for 2 hours to remove most of the paraffin.
[0072] 6) Place the extracted green body into a vacuum furnace for sintering. The vacuum degree is 10-3 Pa, the sintering temperature is 1350℃, and the sintering time is 120 min.
[0073] 7) The above sintered body is simply machined by a centerless mill to obtain a semi-hollow cylinder, so that its outer diameter meets the requirements.
[0074] 8) The above sintered body is simply machined by a centerless mill to obtain a quasi-hollow cylinder (one end is not connected, used to machine the sharp closed end 16), so that its outer diameter meets the requirements.
[0075] 9) A first electrode layer 30 is prepared on the outer surface of the quasi-hollow cylinder with an open end using the "immersion coating-vacuum sintering" method, and an insulating coating is prepared on the first electrode layer 30.
[0076] 10) The end of the cylinder away from the opening is sharpened, and a second electrode layer 50 is further prepared on the outer surface of the heating element 10. One end of the second electrode layer 50 is connected to the heating element 10 through the closed end 16, and the other end extends toward the side where the opening is located and is above the insulating layer 70, but does not exceed the insulating layer 70.
[0077] 11) The electrodes and mounting parts are brazed together in an atmosphere furnace or a vacuum furnace, and the first electrode 82 and the second electrode 84 are respectively connected to the first electrode layer 30 and the second electrode layer 50.
[0078] 12) Glaze preparation; a protective glaze layer is prepared by sintering on the surface of the heating element 10 in an atmosphere furnace or a vacuum furnace. Depending on the specific circumstances, the base fixing can also be installed after the glaze layer preparation is completed. The installation sequence of the mounting parts is not limited here.
[0079] The heating element 10 prepared according to the above process has a resistance of 0.82Ω and a temperature coefficient of resistance (TCR) of 1300ppm / ℃.
[0080] It can be seen from the above 1-2 embodiments that:
[0081] (1) Densification sintering of the heating element 10 can be achieved at a relatively low vacuum level and sintering temperature. Moreover, during the entire sintering process, no chemical reaction or high-temperature chemical diffusion occurs between the metal phase and the ceramic phase, which results in good high-temperature chemical compatibility and high sintering activity between the metal phase and the ceramic phase materials.
[0082] (2) The raw materials for the heating element 100 are widely available and inexpensive, so the material cost of the heating element 100 is low. In addition, because the metal phase and ceramic phase have high sintering activity and good processing performance, the process for preparing the heating element 100 is simple and the manufacturing cost is also low.
[0083] (3) The heating component 100 obtained by the above preparation method can meet the requirements that the resistivity of the heating element 10 is 4×10-6Ω·m~8×10-4Ω·m and the temperature coefficient of resistance (TCR) is greater than 600ppm / ℃, and can realize the functions of heating component 100 heating and precise temperature control.
[0084] (4) Because the metal mass percentage in the heating element 10 is relatively high and the metal has high toughness, the heating element 10 has both the toughness of metal and the high strength of ceramic in terms of mechanical properties, so that the heating element 10 can have high bending strength.
[0085] (5) The high metal content in the heating element 10 and the stable resistivity of the metal, which is not affected by the stoichiometry and sintering atmosphere, make the heating element 10 highly reproducible in preparation and have high resistivity stability.
[0086] (6) The heating element 10 does not need to be grooved, which ensures the mechanical strength of the heating element 10 and prevents the heating element 10 from breaking. At the same time, the heating element 10, which does not need to be grooved, is easy to process and form, reducing the processing difficulty and manufacturing cost.
[0087] In summary, the above-described method for preparing the heating element 100 enables the resistivity of the heating element 10 to be 4 × 10⁻⁶. -6 Ω·m~8×10 -4 With a resistance temperature coefficient greater than 600ppm / ℃, the heating element 10 fills the current application range of conventional heating resistors and can meet the requirements of some specific heating non-combustible aerosol forming devices for the resistivity of the heating component 100, thus realizing heating and precise temperature control functions.
[0088] In one embodiment of this application, an electronic atomizing device is also provided, including the heating component 100 described in any of the above embodiments. The heating component 100 includes a heating element 10, a first electrode layer 30, and a second electrode layer 50. The first electrode layer 30 is at least partially disposed on the outer peripheral surface of one axial end of the heating element 10, and the second electrode layer 50 is at least partially disposed on the outer peripheral surface of the other axial end of the heating element 10. The heating element 10 is a conductive element, and a current is formed inside the heating element 10 flowing along its own axial direction from one of the first electrode layer 30 and the second electrode layer 50 to the other.
[0089] In this way, the heating element 10 itself acts as a conductive element, generating heat when energized to heat the atomized aerosol matrix mounted on it. Furthermore, a first electrode layer 30 and a second electrode layer 50 are respectively provided at opposite ends of the heating element 10 along its axial direction to serve as electrical connections between the positive and negative electrodes. When the first electrode layer 30 and the second electrode layer 50 are connected to the circuit and energized, a current can be formed on the heating element 10 flowing from one of the first electrode layer 30 to the other along its axial direction. By providing the first electrode layer 30 and the second electrode layer 50 at opposite ends of the heating element 10 along its axial direction, a straight current path is formed, eliminating the need for a U-shaped current path formed by creating a groove penetrating the thickness direction, as is common in conventional heating elements 10. This results in better mechanical strength for the heating element 10, making it less prone to breakage.
[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0091] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A heating element, characterized in that, The heating component includes a heating element, a first electrode layer, and a second electrode layer. The first electrode layer is at least partially disposed on the outer peripheral surface of one axial end of the heating element, and the second electrode layer is at least partially disposed on the outer peripheral surface of the other axial end of the heating element. The second electrode layer includes a first segment and a second segment arranged and connected to each other along the axial direction of the heating element. The first segment is disposed on the outer peripheral surface of the end away from the first electrode layer, and the second segment extends toward the end where the first electrode layer is located and is disposed on the outer peripheral surface of the heating element. The heating component further includes an insulating layer, which is disposed between the second segment and the heating element; The heating element is a conductor, and it is capable of electrically connecting the first electrode layer and the second electrode layer.
2. The heating component according to claim 1, characterized in that, The heating element has a hollow cavity inside along its own axial direction.
3. The heating component according to claim 2, characterized in that, The heating element includes an open end and a closed end arranged opposite to each other along its own axial direction, and the open end has an opening that communicates with the hollow cavity; The first electrode layer is at least partially disposed on the outer peripheral surface of the open end, the first segment of the second electrode layer is disposed on the outer peripheral surface of the closed end, and the second segment extends toward the open end.
4. The heating component according to claim 3, characterized in that, The heating element includes a middle portion connected between the open end and the closed end, an insulating layer disposed outside the middle portion and a portion of the first electrode layer, and a second segment disposed outside the insulating layer and extending above the first electrode layer.
5. The heating component according to claim 3, characterized in that, The heating element is constructed as a rod-shaped structure, and the closed end is constructed as a sharp structure.
6. The heating component according to claim 1, characterized in that, The heating component further includes a first electrode and a second electrode, the first electrode and the second electrode being connected to the second segment of the first electrode layer and the second electrode layer, respectively.
7. The heating component according to claim 1, characterized in that, The heating component also includes a mounting component, which is sleeved on the outer periphery of one end where the first electrode layer is located.
8. The heating component according to any one of claims 1-7, characterized in that, The heating element comprises ceramic and metal materials, wherein the volume percentage of the metal material is 30%-65% and the volume percentage of the ceramic material is 35%-75%.
9. The heating element according to claim 8, characterized in that, The metallic material includes at least one of nickel, iron, cobalt, copper, titanium, aluminum, and stainless steel; and / or The ceramic material includes at least one of alumina, zirconium oxide, silicon oxide, yttrium oxide, lanthanum oxide, cerium oxide, magnesium oxide, manganese oxide, and titanium oxide.
10. The heating component according to claim 8, characterized in that, The resistivity range of the heating element is 4×10⁻⁶. -6 Ω·m-8×10 -4 Ω·m.
11. The heating component according to claim 8, characterized in that, The temperature coefficient of resistance of the heating element is greater than 600 ppm / ℃.
12. An electronic atomizing device, characterized in that, Includes the heating component described in any one of claims 1-11.