Atomizing core, atomizer, electronic atomization device and atomizing core manufacturing method

Abstract

The present application relates to an atomizing core, an atomizer, an electronic atomizing device and a method for manufacturing an atomizing core. The atomizing core comprises a heating tube including a heating element for generating heat to atomize liquid. A preheating tube is sleeved outside the heating tube, and the preheating tube includes a preheating element for generating a preheating temperature lower than the atomization temperature of the liquid. A base tube is sleeved outside the preheating tube and is used for absorbing liquid, and the liquid in the base tube is preheated by the preheating tube and then enters the heating tube for atomization. Part of the heat generated by the preheating element in the preheating tube can be transmitted to the base tube and the heating tube, and the liquid in the base tube and the heating tube absorbs the heat to reduce the viscosity of the liquid, thereby reasonably increasing the transmission speed of the liquid in the base tube, the preheating tube and the heating tube, ensuring that the liquid supply speed of the heating tube can match the liquid consumption speed, and avoiding dry burning of the entire atomizing core due to the liquid consumption speed being greater than the supply speed.

Description

Technical Field

[0001] This invention relates to the field of atomization technology, and in particular to an atomizing core, an atomizer, an electronic atomization device, and a method for manufacturing an atomizing core. Background Technology

[0002] Traditional atomizing media contain dozens of harmful substances in their aerosols, such as tar, which poses a significant health risk. Furthermore, the aerosols disperse in the air, and inhalation by those nearby can also cause harm. Electronic atomizing devices, while having a similar appearance and taste to traditional atomizing media, typically do not contain tar, particulate matter, or other harmful components found in traditional media. Therefore, electronic atomizing devices are widely used as a substitute for traditional atomizing media.

[0003] Electronic atomizing devices include an atomizer, which in turn includes an atomizing coil. The atomizing coil is used to atomize liquid into an aerosol that can be inhaled. However, traditional atomizing coils often suffer from dry burning due to the liquid consumption rate exceeding the supply rate, which affects the user's vaping experience. Summary of the Invention

[0004] One of the technical problems solved by this invention is how to prevent the atomizing core from burning dry.

[0005] An atomizing core, comprising:

[0006] Heating element, including heating element for generating heat to atomize liquid;

[0007] A preheating tube, sleeved outside the heating tube, the preheating tube including a preheating element that generates a preheating temperature lower than the liquid atomization temperature; and

[0008] The base tube is sleeved outside the preheating tube and is used to absorb liquid. The liquid in the base tube is preheated by the preheating tube and then enters the heating tube for atomization.

[0009] In one embodiment, the preheating tube includes a plurality of preheating units arranged in sequence, each preheating unit including a preheating sleeve and the preheating element, the preheating sleeve having an inner wall surface defining its inner cavity boundary, and the preheating element being attached to the inner wall surface.

[0010] In one embodiment, the preheating elements within each of the preheating units form a parallel circuit or a series circuit.

[0011] In one embodiment, the heating tube further includes a heating sleeve passing through the preheating sleeve, the heating sleeve having an atomizing surface defining its inner cavity boundary, the heating element being attached to the atomizing surface, and the heating element and the preheating element forming a parallel circuit or a series circuit.

[0012] In one embodiment, the wall thickness of both the heating sleeve and the preheating sleeve is 0.05 mm to 0.4 mm, the pore size of both the heating sleeve and the preheating sleeve is 10 μm to 150 μm, and the porosity of both the heating sleeve and the preheating sleeve is 30% to 70%.

[0013] In one embodiment, the base tube has a wall thickness of 0.2 mm to 2 mm, the micropores inside the base tube have a pore size of 10 μm to 150 μm, and the porosity of the base tube is 30% to 70%.

[0014] In one embodiment, a first electrode and a second electrode, both electrically connected to the heating element, are also included, with at least one of the first electrode and the second electrode located within the inner cavity of the heating tube.

[0015] In one embodiment, the distance between the first electrode and the second electrode along the axial direction of the heating tube is greater than half the length of the heating tube.

[0016] In one embodiment, the axial end faces of the heating tube, the preheating tube, and the base tube are flush with each other, and the cross-sections of all three are annular.

[0017] In one embodiment, the preheating temperature of the preheating element is 40°C to 95°C.

[0018] An atomizer comprising the atomizing coil as described above.

[0019] An electronic atomizing device includes a power source and the aforementioned atomizer, wherein the power source is connected to the atomizer.

[0020] A method for manufacturing an atomizer core includes the following steps:

[0021] A heating element and at least one preheating element are generated through a casting process;

[0022] A heating element is attached to the heating plate, and a preheating element with an operating temperature lower than the liquid atomization temperature is attached to the preheating plate;

[0023] The heating element with the heating element attached and the preheating element attached are stacked on top of each other, with the heating element located on the outermost layer, and the heating element and the preheating element are formed into a conductive circuit.

[0024] The heating element is brought into contact with the support, and the stacked heating element and the preheating element are wound around the support to form a tubular body;

[0025] A base tube is formed by injection molding and fitted onto the tubular body; the tubular body and the base tube together form an atomizing preform; and

[0026] The support is unloaded from the atomizing blank, and the atomizing blank is sintered to form an atomizing core.

[0027] In one embodiment, during the stacking process, the surface of the preheating sheet on which the preheating element is disposed faces the heating sheet, and the surface of the heating sheet on which the heating element is disposed faces away from the preheating sheet.

[0028] In one embodiment, the support is cylindrical.

[0029] In one embodiment, the preheating elements are connected in parallel with each other and then connected in parallel with the heating element, or the preheating elements are connected in series with each other and then connected in series with the heating element.

[0030] In one embodiment, before sintering at a temperature of 700°C to 1100°C, the atomized preform is subjected to warm isostatic pressing, and then the atomized preform after warm isostatic pressing is subjected to debinding. During the debinding process, the heating rate is not higher than 2°C / min and the holding time is not less than 2 hours.

[0031] In one embodiment, a first through hole is formed on the heating element by laser drilling, and a first conductive paste is filled into the first through hole. Then, a heating element electrically connected to the first conductive paste is set on the heating element by screen printing. When there are multiple preheating elements, one of the preheating elements is directly set with a preheating element by screen printing. For the remaining preheating elements, a second through hole is first formed by laser drilling, and a second conductive paste is filled into the second through hole. Then, a preheating element electrically connected to the second conductive paste is set by screen printing.

[0032] In one embodiment, the heating element, the preheating element, and the base tube are all made of ceramic material.

[0033] One technical effect of an embodiment of the present invention is that, due to the preheating tube, some of the heat generated by the preheating element in the preheating tube can be transferred to the base tube and the heating tube. The liquid in the base tube and the heating tube absorbs heat, reducing its viscosity, thereby reasonably increasing the liquid's transmission speed in the base tube, preheating tube, and heating tube. This allows the liquid to quickly reach the heating tube for atomization, ensuring that the liquid supply speed to the heating tube matches the liquid consumption speed. This prevents the entire atomizing core from dry-burning due to the liquid consumption speed exceeding the supply speed, thus avoiding the burnt smell and toxic gases produced by dry burning. Especially for high-viscosity liquids with relatively poor flow properties, this atomizing core effectively overcomes the defects caused by the high viscosity of the liquid and avoids dry burning. Attached Figure Description

[0034] Figure 1 A three-dimensional structural diagram of an atomizing core provided in one embodiment;

[0035] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the atomizing core from another perspective;

[0036] Figure 3 for Figure 1 The diagram shows the exploded structure of the atomizing core.

[0037] Figure 4 for Figure 3 A three-dimensional sectional view of the structure;

[0038] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0039] Figure 6 for Figure 1 A schematic diagram of the cross-sectional structure of the atomizing core shown.

[0040] Figure 7 A three-dimensional structural schematic diagram of the atomizing core provided in another embodiment;

[0041] Figure 8 This is a flowchart illustrating the process of manufacturing an atomizer core according to one embodiment. Detailed Implementation

[0042] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0043] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0044] See Figure 1 , Figure 2 and Figure 3 This invention provides an atomizer with a liquid storage chamber and an atomizing core 10. The liquid storage chamber stores liquid, which can be used to generate a matrix for aerosols such as oil. The liquid storage chamber supplies liquid to the atomizing core 10, which generates heat and atomizes the liquid to form an aerosol that can be inhaled by the user. The atomizing core 10 includes a heating tube 100, a preheating tube 200, and a base tube 300.

[0045] See Figure 3 , Figure 4 and Figure 5 The heating tube 100 can be a single unit, comprising a heating sleeve 110 and a heating element 120. The heating sleeve 110 can be cylindrical, giving the entire heating tube 100 a cylindrical tubular structure, i.e., the cross-section of the heating tube 100 is annular. The heating sleeve 110 has an atomizing surface 111, which defines the boundary of the inner cavity of the heating sleeve 110. The heating element 120 can be a diaphragm structure and can be directly attached to the atomizing surface 111. The heating element 120 can be made of materials such as silver, silver-palladium, and silver-platinum, or it can be made of materials such as nickel-chromium, nickel, or iron-nickel-chromium forming a conductive paste and screen-printed onto the heating sleeve 110. The temperature generated by the heating element 120 is sufficient to atomize the liquid. The heating sleeve 110 contains a porous ceramic material, resulting in a large number of micropores with a certain porosity. The pore size of these micropores ranges from 10 μm to 150 μm, with specific values ​​for 10 μm, 50 μm, or 150 μm, etc. The porosity ranges from 30% to 70%, with specific values ​​for 30%, 50%, or 70%, etc. The wall thickness of the heating sleeve 110 cannot be too large, as this increases the difficulty of molding the heating sleeve 110. Conversely, a wall thickness that is too small cannot guarantee the uniformity of the micropore size and the wall thickness throughout the heating sleeve 110. Therefore, the wall thickness of the heating sleeve 110 is from 0.05 mm to 0.4 mm, with specific values ​​for 0.05 mm, 0.2 mm, or 0.4 mm, etc.

[0046] The preheating tube 200 is sleeved outside the heating tube 100. The preheating tube 200 may include multiple preheating units 230 arranged sequentially, such as four preheating units 230. Each preheating unit 230 includes a preheating sleeve 210 and a preheating element 220. The preheating sleeve 210 and the heating sleeve 110 can both be coaxial cylindrical sleeves, so that each preheating unit 230 and the entire preheating tube 200 have a cylindrical tubular structure, that is, the cross-section of the preheating tube 200 is annular. The material of the preheating sleeve 210 can be the same as that of the heating sleeve 110. The preheating sleeve 210 has an inner wall surface 211, which defines the boundary of the inner cavity of the preheating sleeve 210. The preheating element 220 can be a diaphragm structure and can be directly attached to the inner wall surface 211. The preheating element 220 can be made of materials such as silver, silver-palladium, and silver-platinum, or it can be formed by using a conductive paste made of materials such as nickel-chromium, nickel, or iron-nickel-chromium and screen-printed onto the preheating sleeve 210. The preheating temperature generated by the preheating element 220 is insufficient to atomize the liquid; this preheating temperature is between 40°C and 95°C, with specific values ​​such as 40°C, 50°C, or 95°C. Clearly, the heating temperature generated by the heating element 120 is sufficient to atomize the liquid, meaning the heating temperature of the heating element 120 is greater than or equal to the atomization temperature; that is, the preheating temperature generated by the preheating element 220 is less than the heating temperature generated by the heating element 120. The preheating sleeve 210 contains porous ceramic material, resulting in a large number of micropores with a certain porosity. The pore size of these micropores ranges from 10 μm to 150 μm, with specific values ​​for 10 μm, 50 μm, or 150 μm, etc. The porosity ranges from 30% to 70%, with specific values ​​for 30%, 50%, or 70%, etc. The wall thickness of the preheating sleeve 210 cannot be too large or too small. An excessively large wall thickness increases the difficulty of forming the preheating sleeve 210, while an excessively small wall thickness cannot guarantee the uniformity of the micropore size and the wall thickness throughout the preheating sleeve 210. Therefore, the wall thickness of the preheating sleeve 210 is 0.05 mm to 0.4 mm, with specific values ​​for 0.05 mm, 0.2 mm, or 0.4 mm, etc. The wall thicknesses of the preheating sleeve 210 and the heating sleeve 110 can be equal.

[0047] The base tube 300 is sleeved outside the preheating tube 200. The base tube 300 has a cylindrical tubular structure, meaning its cross-section is annular. The heating tube 100, preheating tube 200, and base tube 300 can be coaxially arranged and sequentially sleeved from the inside out, with their axial end faces flush with each other. The base tube 300 contains porous ceramic material, resulting in a large number of micropores with a certain porosity. The pore size of these micropores is 10μm to 150μm, with specific values ​​such as 10μm, 50μm, or 150μm. The porosity can be 30% to 70%, with specific values ​​such as 30%, 50%, or 70%. The wall thickness of the base tube 300 cannot be too large or too small. An excessively large wall thickness results in a slower liquid conduction rate, while an excessively small wall thickness results in a faster liquid conduction rate. Therefore, the wall thickness of the base tube 300 is between 0.2 mm and 2 mm, and the specific value can be 0.2 mm, 1 mm, or 2 mm, etc. The wall thickness of the base tube 300 can be greater than the wall thicknesses of both the heating sleeve 110 and the preheating sleeve 210.

[0048] When the atomizing core 10 is working, the base tube 300 draws liquid from the liquid storage chamber. The liquid in the base tube 300 is input to the heating tube 100 through the preheating tube 200. The liquid in the heating tube 100 will be atomized on the atomizing surface 111 to form an aerosol. The inner cavity of the heating tube 100 is the inner cavity of the entire atomizing core 10. This inner cavity is actually a guide channel 11 for the flow and discharge of aerosol. Because of the preheating tube 200, some of the heat generated by the preheating element 220 in the preheating tube 200 can be transferred to the base tube 300 and the heating tube 100. The liquid in the base tube 300 and the heating tube 100 absorbs heat, reducing its viscosity and thus reasonably increasing the liquid's transmission speed within the base tube 300, preheating tube 200, and heating tube 100. This allows the liquid to quickly reach the atomizing surface 111 for atomization, ensuring that the liquid supply rate on the atomizing surface 111 matches the liquid consumption rate. This prevents the entire atomizing core 10 from dry-burning due to the liquid consumption rate exceeding the supply rate, thereby avoiding the burnt smell and toxic gases produced by dry burning. Especially for high-viscosity liquids with relatively poor flow properties, this atomizing core 10 effectively overcomes the defects caused by the high viscosity of the liquid and avoids dry burning. On the other hand, the heat generated in the preheating tube 200 preheats the heating tube 100 to a certain extent, ensuring uniform heat distribution on the atomizing surface 111, i.e., forming a uniform temperature field on the atomizing surface 111, preventing the liquid from carbonizing and producing a burnt taste due to excessively high local temperatures on the atomizing surface 111. Furthermore, the heating element 120 is located on the atomizing surface 111, allowing the aerosol generated on the atomizing surface 111 to directly and quickly enter the guide channel 11, enabling the user to inhale a larger amount of aerosol per unit time, i.e., increasing the aerosol concentration and resulting in a richer inhalation experience.

[0049] Since the preheating tube 200 can accelerate the liquid transfer speed, the wall thickness of the base tube 300 cannot be too small. An excessively thin base tube 300 will further reduce the liquid transfer resistance, causing "oil splattering" on the atomizing surface 111 due to excessive liquid supply speed. Conversely, an excessively thick base tube 300 will also increase the liquid transfer resistance, thus weakening and offsetting the effect of the preheating tube 200 in accelerating the liquid transfer speed.

[0050] See Figure 1 In some embodiments, the atomizing core 10 further includes a first electrode 410, a second electrode 420, a first conductor, and a second conductor. Both ends of the first electrode 410 are electrically connected to both the first conductor and the heating element 120, and both ends of the second electrode 420 are electrically connected to both the second conductor and the heating element 120. At least one of the first electrode 410 and the second electrode 420 is located within the inner cavity (flow channel 11) of the heating tube 100, for example, both the first electrode 410 and the second electrode 420 are located within the flow channel 11. (See reference...) Figure 7 For example, the first electrode 410 is located in the flow channel 11, and the second electrode 420 is located outside the flow channel. The axial distance between the first electrode 410 and the second electrode 420 in the heating tube 100 is greater than half the length of the heating tube 100. This allows the first electrode 410 to be closer to one end of the heating tube 100, and the second electrode 420 to be closer to the other end of the heating tube 100. In simpler terms, the first electrode 410 and the second electrode 420 are respectively positioned near different ends of the heating tube 100. Of course, the axial distance between the first electrode 410 and the second electrode 420 in the heating tube 100 can be relatively small. In this case, the first electrode 410 and the second electrode 420 are simultaneously positioned near the same end of the heating tube 100.

[0051] The first conductor and the second conductor can be electrically connected to the two electrodes on the power supply, respectively. The first conductor can be electrically connected to the first electrode 410 by welding, abutting, or snap-fitting. Similarly, the second conductor can be electrically connected to the second electrode 420 by welding, abutting, or snap-fitting. When the first electrode 410 and the second electrode 420 are respectively positioned near the two ends of the heating tube 100, the first conductor and the second conductor can be led out first from different ends of the heating tube 100, respectively. When both the first electrode 410 and the second electrode 420 are simultaneously positioned near the same end of the heating tube 100, the first conductor and the second conductor can be led out first from the same end of the heating tube 100, respectively.

[0052] In some embodiments, different preheating elements 220 within the preheating tube 200 can form a parallel circuit. Furthermore, these parallel-connected preheating elements 220 can also form a parallel circuit with the heating element 120. When one preheating element 220 in the preheating tube 200 fails, the remaining preheating elements 220 can still operate normally, allowing the preheating tube 200 to continue preheating and reduce liquid viscosity to increase transport speed, thereby ensuring the reliability of the preheating tube 200. (See also...) Figure 1 When a parallel circuit is formed, both the first electrode 410 and the second electrode 420 are located simultaneously in the flow channel 11. Of course, in other embodiments, different preheating elements 220 within the preheating tube 200 can form a series circuit, and these interconnected preheating elements 220 can further form a series circuit with the heating element 120. See also... Figure 7 When a series circuit is formed, the first electrode 410 is located in the current channel 11, and the second electrode 420 is located outside the current channel.

[0053] This invention also provides an electronic atomizing device, which includes a power supply and the aforementioned atomizer. The atomizer is connected to the power supply, for example, in a detachable connection. The power supply supplies power to the heating element 120 and the preheating element 220 in the atomizing core 10, enabling both the heating element 120 and the preheating element 220 to convert electrical energy into heat energy. Because this electronic atomizing device incorporates the atomizing core 10, it avoids the burnt taste produced by dry burning, while simultaneously providing a richer vaping experience, thereby improving the user experience of the electronic atomizing device.

[0054] See Figure 8 The present invention also provides a method for manufacturing an atomizing core, the atomizing core 10 described above being formed by the method, which mainly includes the following steps:

[0055] The first step, S510, involves generating a heating element and at least one preheating element through a casting process. Specifically, a ceramic slurry is prepared according to a predetermined formula, and then ball-milled and cast to obtain the heating element and preheating element. There can be one heating element and multiple preheating elements, such as four. Given that the wall thickness of both the heating sleeve 110 and the preheating sleeve 210 is designed to be 0.05mm to 0.4mm, the thickness of the heating element and preheating element is designed to be 0.05mm to 0.4mm. This ensures that the thickness of the heating element and preheating element is uniform after casting and allows for the formation of micropores with a reasonable pore size.

[0056] The second step, S520, involves attaching a heating element 120 to the heating plate and attaching a preheating element 220, whose operating temperature is lower than the liquid atomization temperature, to the preheating plate. (See reference...) Figure 6Specifically, a first through hole 112 is formed on the heating element. This first through hole 112 can be formed by laser drilling. A first conductive paste is filled into the first through hole 112. After the first conductive paste has solidified, a heating element 120 is then set on the heating element by screen printing, and the heating element 120 is electrically connected to the first conductive paste. When there are multiple preheating elements, one of the preheating elements does not need to be drilled; a preheating element 220 can be directly set on the preheating element by screen printing. For the remaining preheating elements, a second through hole 212 is first formed by laser drilling, and a second conductive paste is filled into the second through hole 212. After the second conductive paste has solidified, a preheating element 220 is then set on each preheating element by screen printing, and the preheating element 220 on each preheating element is electrically connected to the second conductive paste on it.

[0057] In the third step, S530, the heating element 120 and the preheating element 220 attached to the heating sheet are stacked together, with the heating sheet on the outermost layer, and the heating element 120 and the preheating element 220 forming a conductive circuit. Specifically, during the stacking process, the surface of the preheating sheet with the preheating element 220 is facing the heating sheet, and the surface of the heating sheet with the heating element 120 is facing away from the preheating sheet. For example, a support plane is provided, and the surface of the heating sheet with the heating element 120 is placed downwards and in direct contact with the support plane, so that the heating sheet is supported on the support plane; then, the surface of one of the preheating sheets with the preheating element 220 is placed downwards and in direct contact with the surface of the heating sheet without the heating element 120, so that the preheating sheets are stacked together; then, the surfaces of the other preheating sheets with the preheating element 220 are placed downwards and stacked sequentially, of course, the preheating sheets without holes are placed on the top layer. After this layering process, the heating element is located at the bottom layer, that is, at the outermost layer of the entire laminate. Simultaneously, regarding the circuit configuration of the heating element 120 and the preheating element 220, through the action of the first and second conductive pastes, the preheating elements 220 can be connected in parallel with each other and then in parallel with the heating element 120, or the preheating elements 220 can be connected in series with each other and then in series with the heating element 120.

[0058] In step four, S540, the heating element is brought into contact with the support, and the stacked heating element and preheating element are wound around the support to form a tubular body. Specifically, a cylindrical support is provided, and the heating element is brought into direct contact with the support, i.e., the heating element is closest to the support, thereby winding the stacked body around the support to form a tubular body. Given that the thickness of the heating element and preheating element is designed to be 0.05mm to 0.4mm, good winding performance of the heating element and preheating element can be ensured, preventing wrinkles from affecting the formation of the atomizing core 10 during the winding process. Clearly, the wound heating element will form a heating sleeve 110, and the wound preheating element will form a preheating sleeve 210.

[0059] Step 5, S550, involves forming a base tube 300 fitted onto a tubular body using injection molding. The tubular body and the base tube 300 together form an atomized preform. Specifically, the atomized preform is placed in an injection mold, and a slurry containing ceramic material is injected into the mold cavity using an injection molding machine. The slurry forming the base tube 300 has a similar material system to the slurry forming the heating element and preheating element, and their thermal expansion properties are matched. After the slurry cools and solidifies, the base tube 300 is fitted onto the outermost preheating sleeve 210.

[0060] Step 6, S560: Unload the support from the atomizing blank and sinter the atomizing blank to form the atomizing core 10. Specifically, before sintering, the atomizing blank is subjected to isostatic pressing, i.e., uniformly extruding the atomizing blank in all directions using a pressure medium, making the atomizing blank more structurally robust. Then, the atomizing blank after isostatic pressing is subjected to debinding treatment, so that the organic matter inside the atomizing blank is decomposed and discharged by heating the atomizing blank. During the heating process, the heating rate does not exceed 2℃ / min. After reaching the set temperature, the set temperature is kept constant for a certain period of time to form a heat preservation treatment. The heat preservation treatment time is not less than 2 hours. This can well ensure the connection strength between the heating sleeve 110, the preheating sleeve 210 and the base tube 300, and also ensure the connection strength between the heating element 120 and the heating sleeve 110, and between the preheating element 220 and the preheating sleeve 210. After the adhesive removal process is completed, the atomizing preform is sintered to form the atomizing core 10 in product form. During the sintering process, the sintering temperature is controlled between 700℃ and 1100℃. After the atomizing core 10 is sintered, the average pore size of the entire atomizing core 10 can reach 100μm to 80μm, and the porosity is 30% to 70%.

[0061] 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.

[0062] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An atomizing core, characterized in that, include: Heating element, including heating element for generating heat to atomize liquid; A preheating tube, sleeved outside the heating tube, includes a preheating element that generates a preheating temperature lower than the liquid atomization temperature; the preheating tube includes a plurality of preheating units sequentially sleeved together, each preheating unit including a preheating sleeve and the preheating element, the preheating sleeve having an inner wall surface defining its inner cavity boundary, and the preheating element being attached to the inner wall surface; and A base tube is fitted outside the preheating tube and is used to absorb liquid. The liquid in the base tube is preheated by the preheating tube and then enters the heating tube for atomization. The heating tube further includes a heating sleeve passing through the preheating tube. The heating sleeve has an atomizing surface that defines the boundary of its inner cavity. The heating element is attached to the atomizing surface. The wall thickness of the base tube is greater than the wall thickness of the heating sleeve and the preheating sleeve.

2. The atomizing core according to claim 1, characterized in that, Both the preheating sleeve and the heating sleeve are cylindrical sleeves.

3. The atomizing core according to claim 1, characterized in that, The preheating components in each of the preheating units form parallel or series circuits.

4. The atomizing core according to claim 1, characterized in that, The heating element and the preheating element form a parallel circuit or a series circuit.

5. The atomizing core according to claim 4, characterized in that, The wall thickness of both the heating sleeve and the preheating sleeve is 0.05 mm to 0.4 mm, the pore size of both the heating sleeve and the preheating sleeve is 10 μm to 150 μm, and the porosity of both the heating sleeve and the preheating sleeve is 30% to 70%.

6. The atomizing core according to claim 1, characterized in that, The base tube has a wall thickness of 0.2 mm to 2 mm, the micropores inside the base tube have a pore size of 10 μm to 150 μm, and the porosity of the base tube is 30% to 70%.

7. The atomizing core according to claim 1, characterized in that, It also includes a first electrode and a second electrode that are electrically connected to the heating element, at least one of the first electrode and the second electrode being located in the inner cavity of the heating tube.

8. The atomizing core according to claim 7, characterized in that, The distance between the first electrode and the second electrode along the axial direction of the heating tube is greater than half the length of the heating tube.

9. The atomizing core according to claim 1, characterized in that, The heating tube, preheating tube, and base tube have axially aligned end faces that are flush with each other, and all three have circular cross-sections.

10. The atomizing core according to claim 1, characterized in that, The preheating temperature of the preheating component is 40°C to 95°C.

11. An atomizer, characterized in that, Includes the atomizing core according to any one of claims 1 to 10.

12. An electronic atomizing device, characterized in that, It includes a power source and the atomizer as described in claim 11, wherein the power source is connected to the atomizer.

13. A method for manufacturing an atomizing core according to any one of claims 1 to 10, characterized in that, Includes the following steps: A heating element and at least one preheating element are generated through a casting process; A heating element is attached to the heating plate, and a preheating element with an operating temperature lower than the liquid atomization temperature is attached to the preheating plate; The heating element with the heating element attached and the preheating element attached are stacked on top of each other, with the heating element located on the outermost layer, and the heating element and the preheating element are formed into a conductive circuit. The heating element is brought into contact with the support, and the stacked heating element and the preheating element are wound around the support to form a tubular body; A base tube is formed by injection molding and fitted onto the tubular body; the tubular body and the base tube together form an atomizing preform; and The support is unloaded from the atomizing blank, and the atomizing blank is sintered to form an atomizing core.

14. The method for manufacturing an atomizing core according to claim 13, characterized in that, During the stacking process, the surface of the preheating sheet on which the preheating element is disposed faces the heating sheet, and the surface of the heating sheet on which the heating element is disposed faces away from the preheating sheet.

15. The method for manufacturing an atomizing core according to claim 13, characterized in that, The support body is made into a cylindrical shape.

16. The method for manufacturing an atomizing core according to claim 13, characterized in that, The preheating components can be connected in parallel with each other and then connected in parallel with the heating component, or the preheating components can be connected in series with each other and then connected in series with the heating component.

17. The method for manufacturing an atomizing core according to claim 13, characterized in that, Before sintering at a temperature of 700℃ to 1100℃, the atomized preform is subjected to warm isostatic pressing treatment, and then the atomized preform after warm isostatic pressing treatment is subjected to debinding treatment. During the debinding treatment, the heating rate is not higher than 2℃ / min and the holding time is not less than 2h.

18. The method for manufacturing an atomizing core according to claim 13, characterized in that, A first through hole is formed on the heating element by laser drilling, and a first conductive paste is filled into the first through hole. Then, a heating element electrically connected to the first conductive paste is set on the heating element by screen printing. When there are multiple preheating elements, one of the preheating elements is directly set with a preheating element by screen printing. For the remaining preheating elements, a second through hole is first formed by laser drilling, and a second conductive paste is filled into the second through hole. Then, a preheating element electrically connected to the second conductive paste is set by screen printing.

19. The method for manufacturing an atomizing core according to claim 13, characterized in that, The heating element, preheating element, and base tube are all made of ceramic material.

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