A composite heating element with multiple ventilation holes

Abstract

The present invention provides a composite heating element with multiple air vents and a preparation method thereof. The heating element comprises a ceramic substrate (101) and a heating element (102). The ceramic substrate (101) is provided with at least two air vents, one of which is a main air vent (10102) that vertically penetrates the ceramic substrate (101). The main air vent (10102) is further provided with at least one auxiliary air vent (10101) as a bypass, and the auxiliary air vent (10101) also vertically penetrates the ceramic substrate (101). The auxiliary air vent (10101) is provided with an auxiliary air vent tube (103) whose wall material is impermeable to tobacco oil. The composite heating element of the present invention can isolate tobacco oil and prevent tobacco oil from penetrating by adding an auxiliary air vent tube, thereby solving the problem that the air vents of existing electronic atomization devices are blocked due to tobacco oil penetration and aerogel condensation, resulting in inability to draw air. The preparation method of the composite heating element of the present invention is simple and very suitable for industrial production.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic atomization, and in particular relates to a composite heating element with multiple air vents. Background Art

[0002] Electronic atomization involves the atomization of liquid into small aerogel particles through heating or ultrasonic vibrations. With the continuous improvement and innovation of atomization technology, it has now been widely used in the home and medical fields, such as humidifiers and aromatherapy machines, and aerosol therapy in medicine.

[0003] Electronic atomizer devices primarily consist of an atomizer and a power supply, with the core component of the atomizer being the heater. Currently, the heaters in electronic atomizer devices on the market are mostly made of porous ceramic. However, ceramic heaters have poor overall performance, especially existing vertical ceramic heaters, which are typically hollow cylindrical structures with a single vent, inside which the heating element is wound. This heater structure can clog the vent when high-viscosity liquid e-liquid penetrates. Furthermore, the backflow of aerosolized e-liquid condensing into droplets within the vent can also clog the vent. When the vent is clogged, cool air from the outside is difficult to enter, resulting in only the heated, atomized smoke escaping downstream from the vent without external air to carry and cool it. This results in the smoke being inhaled being too hot, concentrated, and subject to high draw resistance, severely impacting the puffing experience. Existing solutions mostly utilize preheating the heater, but this significantly increases the cost of the entire atomizer device and fails to fundamentally address the issue of clogged vents and inability to draw. The present invention is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] In one aspect, the present invention provides a composite heating element with multiple vents, including a ceramic substrate 101 and a heating element 102 .

[0005] The ceramic substrate 101 is provided with at least two ventilation holes, one of which is a main ventilation hole 10102 that passes through the ceramic substrate 101 longitudinally; at least one auxiliary ventilation hole 10101 is provided by-passing the main ventilation hole 10102, and the auxiliary ventilation hole 10101 also passes through the ceramic substrate 101 longitudinally.

[0006] The ceramic substrate 101 has a liquid absorption surface and an atomization surface. The liquid absorption surface is the outer surface of the ceramic substrate, which is used for direct contact with the e-liquid. The atomization surface is the inner surface of the main vent hole 10102, which is used to atomize the e-liquid to form smoke.

[0007] An auxiliary ventilation tube 103 whose wall material is impermeable to tobacco oil is provided in the auxiliary ventilation hole 10101. The height of the auxiliary ventilation tube 103 is not less than the height of the auxiliary ventilation hole 10101. The heating element 102 is arranged inside the main ventilation hole 10102 or at least partially embedded in the ceramic matrix 101.

[0008] Preferably, the heating element 102 is attached to the inner wall of the main vent 10102 .

[0009] Preferably, the material of the ceramic substrate 101 is selected from one or more of alumina, silicon carbide, silicon nitride and aluminum nitride.

[0010] Preferably, the porosity of the ceramic matrix 101 is 30% to 70%.

[0011] Preferably, the average pore size of the ceramic substrate 101 is 5 μm to 100 μm.

[0012] Preferably, the thickness of the ceramic substrate 101 is 2 mm to 10 mm.

[0013] Preferably, the auxiliary ventilation tube (103) has a diameter of 0.1 mm to 2 mm and is made of ceramic, metal or other high-temperature resistant materials.

[0014] Preferably, the heating element 102 is a metal heating body, a metal heating wire or a metal heating film.

[0015] Preferably, the heating element 102 is in a straight line shape, a broken line shape, an arc shape or a spiral shape.

[0016] Another aspect of the present invention provides a method for preparing a composite heating element having multiple vents, the method comprising the following steps:

[0017] (1) preparing at least one auxiliary vent tube by injection molding, die casting, sintering or machining;

[0018] (2) obtaining a first ceramic body by injection molding or tape casting, and longitudinally opening the first ceramic body to form a main vent hole, and simultaneously embedding an auxiliary vent tube in a bypass of the main vent hole of the first ceramic body to obtain a second ceramic body;

[0019] (3) embedding the heating element in the main vent hole to obtain a third ceramic body;

[0020] (4) Sintering the third ceramic body to obtain a composite heating element with multiple air vents.

[0021] Beneficial effects of the present invention:

[0022] (1) The ceramic substrate of the composite heating element of the present invention is provided with at least two ventilation holes, one of which is a main ventilation hole, which passes through the ceramic substrate longitudinally. The inner surface of the main ventilation hole is an atomizing surface, which is used to atomize the tobacco oil to form smoke. The main ventilation hole bypass is also provided with at least one auxiliary ventilation hole, which also passes through the ceramic substrate longitudinally. An auxiliary ventilation tube whose wall material is impermeable to tobacco oil is provided in the auxiliary ventilation hole, and the height of the auxiliary ventilation tube is not less than the height of the auxiliary ventilation hole. By adding an auxiliary ventilation tube, the present invention can isolate tobacco oil and prevent tobacco oil from penetrating, thereby solving the problem that the ventilation holes of existing electronic atomization devices are blocked due to tobacco oil penetration and aerogel condensation, resulting in the inability to draw. Because once the main ventilation hole is blocked by tobacco oil, under the action of the user's suction, there are auxiliary ventilation holes that can send outside air into the downstream of the composite heating element to mix with the tobacco smoke for cooling and dilution, ensuring that the tobacco smoke temperature and suction resistance are appropriate.

[0023] (2) The preparation method of the composite heating element of the present invention is simple and very suitable for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the composite heating element of the present invention.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the ceramic matrix of the composite heating element of the present invention.

[0026] Figure 3 Schematic diagram of the decomposition structure of the composite heating element of the present invention.

[0027] Figure 4 The figure is a flow chart of the preparation method of the composite heating element of the present invention.

[0028] Figure 5 This is a cross-sectional schematic diagram of an atomizing device having a composite heating element with multiple air holes according to Example 3 of the present invention.

[0029] Figure 6 This is a schematic structural diagram of a hollow cylindrical alumina ceramic heating element with only one central air vent in comparative example 1 of the present invention.

[0030] The specific reference numerals are as follows:

[0031] 1-Compound heating element;

[0032] 101-ceramic substrate;

[0033] 10101-Auxiliary vent;

[0034] 10102-main vent;

[0035] 102-heating element;

[0036] 103- auxiliary ventilation tube;

[0037] 2-airway tube;

[0038] 3-Oil storage tank;

[0039] 4-Sealing silicone;

[0040] 5-Suction nozzle;

[0041] 6- Power supply;

[0042] 8- Traditional heating element;

[0043] 801-traditional alumina ceramic substrate;

[0044] 802-Heating element. DETAILED DESCRIPTION

[0045] The present invention is described in further detail below with reference to the embodiments.

[0046] Example 1

[0047] like Figure 1 As shown, a composite heating element 1 with multiple vents comprises a ceramic substrate 101 and a heating element 102. The ceramic substrate 101 is a hollow columnar structure made of alumina with a diameter of 5 mm.

[0048] The ceramic substrate 101 is provided with two ventilation holes. One ventilation hole runs through the center of the ceramic substrate 101 and serves as the main ventilation hole 10102. It has a diameter of 2 mm and is made of alumina with a porosity of 55% and a pore size of 35 μm. Two auxiliary ventilation holes 10101 are provided in bypass of the main ventilation hole 10102. The auxiliary ventilation holes 10101 run through the ceramic substrate 101 and are parallel to the main ventilation hole 10102.

[0049] An auxiliary ventilation tube 103 whose wall material is impermeable to smoke oil is also inserted into the auxiliary ventilation hole 10101. The height of the auxiliary ventilation tube 103 is not less than the height of the auxiliary ventilation hole 10101. The auxiliary ventilation tube 103 is a tubular structure with an inner diameter of 0.5 mm and an outer diameter of 1 mm, and is made of titanium alloy tube.

[0050] The ceramic substrate 101 has a liquid absorption surface and an atomization surface. The liquid absorption surface is the outer surface of the ceramic substrate 101, which is used for direct contact with the e-liquid. The atomization surface is the inner surface of the main vent 10102, which is used to atomize the e-liquid to form smoke.

[0051] The heating element 102 is made of wound metal wire and is attached to the inner wall surface of the main vent hole 10102 of the ceramic base 101.

[0052] Example 2

[0053] The method for preparing a composite heating element with multiple vents described in Example 1 comprises the following steps:

[0054] (1) Prepare at least one auxiliary ventilation tube 103 by injection molding, die casting, sintering or machining.

[0055] (2) A first ceramic body is obtained by injection molding or tape casting, and the longitudinal center of the first ceramic body is opened to form a main vent hole 10102. At the same time, an auxiliary vent tube 10101 is embedded in the bypass of the main vent hole 10102 of the first ceramic body to obtain a second ceramic body.

[0056] (3) Embed the heating element on the surface of the main vent hole to obtain a third ceramic body.

[0057] (4) Sintering the third ceramic body to obtain a composite heating element with multiple air vents.

[0058] Example 3

[0059] like Figure 5 As shown, an atomizing device with a composite heating element having multiple air holes includes a composite heating element 1, an airway tube 2, an oil storage tank 3, a sealing silica gel 4, a nozzle 5 and a power supply 6.

[0060] The oil storage tank 3 is a hollow structure, and the upper part is tightly connected to the sealing silica gel 4.

[0061] The composite heating element 1 is located inside the airway tube 2 and is a hollow cylindrical structure. The axial outer surface of the composite heating element 1 is the liquid absorption surface, and the axial inner surface of the main air vent 10102 is the atomization surface.

[0062] The airway pipe 2 is a hollow tubular structure, located inside the oil storage tank and provided with oil inlet holes on both sides, and a composite heating element 1 is installed inside.

[0063] The power supply 6 is installed at the bottom of the entire atomizing device and is used to control the output of the entire atomizing device.

[0064] Comparative Example 1

[0065] like Figure 6 As shown, this comparative example is a traditional hollow cylindrical heating element 8 with only one central vent, comprising a traditional alumina ceramic substrate 801 and a heating element 802. The specific preparation steps of the traditional alumina ceramic substrate 801 are as follows: using a planetary ball mill, preparing an alumina slurry containing 50% by weight of a pore-forming agent, using a PE film as a carrier film, and using a casting machine to cast, laminate, and sinter the slurry into a traditional alumina ceramic substrate 801 with a diameter of 5 mm and a vent of 2 mm. Testing shows that the pore diameter of the traditional alumina ceramic substrate 801 is 35 μm and the porosity is 55%.

[0066] In the same manner as in Comparative Example 1, 1000 pieces of the ceramic substrates of Example 1 and Comparative Example 1 were prepared.

[0067] 500 ceramic substrates from Example 1 and Comparative Example 1, each with substantially identical resistance, were selected and loaded into the atomizer device of Example 3. Pure e-liquid was injected into the reservoir and the device was placed in a 0°C incubator for 3 hours. After 3 hours, the atomizer was removed and tested for proper operation after 5 consecutive puffs. This test cycle was repeated 10 times.

[0068] The comparative test results are shown in the following table:

[0069] type Porosity Aperture Resistance range Functional test yield Analysis of defect causes Example 1 55％ 35μm 1.0Ω 100％ none Comparative Example 1 55％ 35μm 1.0Ω 70％ Observe with a magnifying glass and see that the oil is blocking the hole

[0070] The above test results show that the auxiliary ventilation tube added by the present invention can isolate the smoke oil and prevent the smoke oil from penetrating, thereby solving the problem of the main ventilation hole being blocked and thus unable to draw due to the smoke oil penetration and aerogel condensation.

[0071] The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A composite heating element with multiple ventilation holes, comprising a ceramic substrate (101) and a heating element (102); the ceramic substrate (101) is provided with at least two ventilation holes, one of which is a main ventilation hole (10102) and passes through the ceramic substrate (101) longitudinally; the main ventilation hole (10102) is bypassed by at least one auxiliary ventilation hole (10101), and the auxiliary ventilation hole (10101) also passes through the ceramic substrate (101) longitudinally; the thickness of the ceramic substrate (101) is 2mm~10mm; an auxiliary ventilation tube (103) whose wall material is impermeable to tobacco oil is provided in the auxiliary ventilation hole (10101); the diameter of the auxiliary ventilation tube (103) is 0.1mm-2mm, and the material is ceramic or metal or other high-temperature resistant material; the height of the auxiliary ventilation tube (103) is not less than the height of the auxiliary ventilation hole (10101); the heating element (102) is provided inside the main ventilation hole (10102) or at least partially embedded inside the ceramic matrix (101).

2. The composite heating element according to claim 1, characterized in that The material of the ceramic matrix (101) is selected from one or more of alumina, silicon carbide, silicon nitride and aluminum nitride, and has a porosity of 30% to 70% and an average pore size of 5 μm to 100 μm.

3. The composite heating element according to claim 1, characterized in that The heating element (102) is attached to the inner wall of the main vent hole (10102).

4. The composite heating element according to claim 1, characterized in that The heating element (102) is a metal heating body, a metal heating wire or a metal heating film.

5. The composite heating element according to claim 1, characterized in that The heating element (102) is in a straight line shape, a broken line shape, an arc shape or a screw shape.

6. The composite heating element according to claim 1, characterized in that The preparation method of the composite heating element comprises the following steps: (1) Prepare at least one auxiliary vent tube by injection molding, die casting, sintering or machining; (2) obtaining a first ceramic body by injection molding or tape casting, and longitudinally opening the first ceramic body to form a main vent hole, and at the same time embedding an auxiliary vent tube in a bypass of the main vent hole of the first ceramic body to obtain a second ceramic body; (3) Embedding the heating element in the main vent hole to obtain a third ceramic body; (4) Sintering the third ceramic body to obtain a composite heating element with multiple air pores.

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