Heating device and method of manufacturing the same, electronic cigarette

Abstract

The application discloses a heating device for heating an electronic cigarette, comprising a heating module and a whole heating module with electric conductivity and heat conductivity, wherein the whole heating module is connected with the heating module; the heating module provides a heat source for the whole heating module; and the whole heating module uniformly heats tobacco in the electronic cigarette. The application further discloses an electronic cigarette with the heating device and a preparation method of the heating device. The heating device has the advantages of fast heating, uniform heating and convenient assembly.

Description

Technical Field

[0001] The present invention relates to the field of electronic cigarettes, and in particular to a heating device and a preparation method thereof, and an electronic cigarette. Background Art

[0002] Traditional tobacco is ignited and inhaled by the user, producing smoke. This smoke is solid particles containing nicotine, flavors, coal tar, and other complex substances, up to thousands of them. Some of these substances directly affect the user's health, hence the development of low-temperature tobacco. Low-temperature non-combustion tobacco, as it's called, allows the nicotine and other flavoring substances within the tobacco to evaporate during the heating process without producing solid particles, instead producing only atomized vapor, significantly reducing the harmful effects of tobacco. Low-temperature non-combustion is actually a low-temperature distillation process, typically heating at temperatures between 200°C and 400°C. Low temperature here refers to heating temperatures within the 200°C to 400°C range.

[0003] At present, the common practice in the market is that the heating element is used for heating, and the power supply is used to provide power and control. In the heating element part, there are two forms of mainstream products. One is a ceramic heating core, which is usually composed of a ceramic substrate, a thick film printed resistor and a protective film. The ceramic heating core can be a needle-type structure or a sheet-type structure, and the ceramic heating core is inserted into the tobacco for heating. The ceramic heating core can also be an outer structure surrounded by a ceramic substrate. There is also a metal heating body on the market that heats tobacco. The metal heating body is composed of a metal shell, an insulating material and a heating element. No matter which of the above-mentioned heating methods, resistors are indispensable. Without resistors or uncontrollable resistors, there is no way to carry out smooth heating and baking. Therefore, the above-mentioned heating methods have the following defects:

[0004] 1. Low yield and high cost.

[0005] Because it is a thick-film printed resistor, the production process route is relatively long. The preparation of the heating element alone requires complex oxygen-free sintering processes such as firing the substrate, glaze sintering, thick-film printed resistor, resistor sintering, glaze protection sintering, laser cutting, resistor testing, and firing electrode contacts, resulting in low yield and high cost.

[0006] 2. Heat conduction is slow and smoke generation is slow.

[0007] Whether it's a ceramic substrate with a thick film printed resistor or a metal housing with a heating element, both are multi-layer structures. The ceramic glaze layer acts as a thermal insulator, increasing the heat dissipation of the heating element. This essentially uses a single heat source for conductive heating. Therefore, the substrate must be heated before heat can be radiated outward, requiring a significant cooling time. Generally, heating takes 15-20 seconds from start to completion.

[0008] 3. Easy to damage.

[0009] Since the ceramic substrate has thickness requirements and its surface needs to be added with printed resistors, protective films, etc., the space left for the substrate is relatively small. Since the substrate is relatively weak and has poor bending resistance, it is easy to break, or the printed resistor will be short-circuited when bent, so the ceramic substrate is easily damaged.

[0010] 4. Uneven heating

[0011] The heating element of the ceramic substrate thick film printed resistor has a heating direction that slowly diffuses heat from the center of the heating resistor to the periphery. The temperature is high in the core heating area and low at the edge. It takes a certain amount of time to reach a uniform temperature and a balanced thermal field. After heating, residual smoke will appear, the middle part is highly carbonized, and even blackened, while the outer side has not yet completely precipitated.

[0012] 5. The taste will be sour

[0013] The heating element of the ceramic substrate thick film printed resistor may be overheated locally due to uneven heating, causing a sour smell to precipitate. Summary of the Invention

[0014] The present invention provides a heating device with integral heat generation, which aims to solve the five problems mentioned in the background technology.

[0015] The technical solutions of the present invention are as follows:

[0016] A heating device, comprising:

[0017] The heating module and the integral heating module with electrical conductivity and thermal conductivity are mechanically connected to the heating module. The heating module provides a heat source for the integral heating module, and the integral heating module uniformly heats the tobacco in the electronic cigarette.

[0018] Furthermore, the heating module includes a power supply and an electrode assembly, one end of the electrode assembly is connected to the power supply, and the other end of the electrode assembly is connected to the overall heating module.

[0019] Furthermore, the integral heating module includes an integrally formed heating portion and an electrode contact portion, the electrode contact portion is connected to the electrode assembly, and the heating portion is exposed to the electrode assembly.

[0020] Furthermore, the electrode assembly is a positive electrode plug-in block and a negative electrode plug-in block, the integral heating module is a substantially inverted U-shaped plate, and the heating portion is located at the upper end of the inverted U-shaped plate;

[0021] The electrode contact portion is a first electrode contact module and a second electrode contact module respectively located at the lower ends of the two vertical sides of the U-shaped plate. A through groove extending from the middle and upper part of the U-shaped plate to the bottom is provided on the vertical center axis of the U-shaped plate.

[0022] Furthermore, the heating device further comprises a mounting seat assembly, and the mounting seat assembly comprises a mounting seat;

[0023] The first electrode contact module is provided with a first anti-slip groove that is horizontally open outward, and the second electrode contact module is provided with a second anti-slip groove that is horizontally open outward. The first anti-slip groove and the second anti-slip groove are symmetrical with respect to the vertical center line of the U-shaped plate. The first electrode contact module is inserted into the first groove at the upper end of the positive electrode plug-in block, and the second electrode contact module is inserted into the second groove at the upper end of the negative electrode plug-in block.

[0024] The lower end of the positive plug-in block is inserted into the first elastic groove at the upper end of the mounting seat, and the lower end of the negative plug-in block is inserted into the second elastic groove at the upper end of the mounting seat. The first elastic groove and the second elastic groove are arranged side by side.

[0025] Furthermore, the heating device further comprises a mounting seat assembly, and the mounting seat assembly comprises a mounting seat;

[0026] The electrode assembly is a positive electrode embedded column and a negative electrode embedded column;

[0027] The integral heating module is a substantially inverted U-shaped plate, and the heating portion is located at the upper end of the U-shaped plate;

[0028] An electrode contact portion is provided at the lower end of each vertical side of the U-shaped plate, a strip block is provided at the lower end of each electrode contact portion, and an embedding hole is provided at the lower end of each strip block, and the upper ends of the positive electrode embedding column and the negative electrode embedding column are respectively inserted into the embedding holes;

[0029] The positive electrode embedded column is inserted into the first elastic groove located at the upper end of the mounting seat, and the negative electrode embedded column is inserted into the second elastic groove located at the upper end of the mounting seat; the first elastic groove and the second elastic groove are arranged side by side.

[0030] Furthermore, a contact portion of one of the embedding holes that contacts the positive electrode embedding column is treated with silver paste, and a contact portion of the other embedding hole that contacts the negative electrode embedding column is treated with silver paste.

[0031] Furthermore, the mounting seat assembly also includes an insulating jacket arranged on the outside of the mounting seat.

[0032] The present invention also discloses an electronic cigarette, which includes the heating device described above.

[0033] The present invention also discloses a method for preparing a heating device, which is characterized by comprising the following steps:

[0034] A heating module and an integral heating module with electrical conductivity and thermal conductivity are prepared separately; wherein the specific steps of preparing the integral heating module with electrical conductivity and thermal conductivity are as follows:

[0035] S1, prepare raw materials:

[0036] The ingredients are prepared according to the following components and parts by mass to obtain a mixture:

[0037] The mixture and the liquid medium are stirred and mixed in a mass ratio of 1:0.5-1 to obtain the raw material;

[0038] S2, compression molding: placing the raw material into a mold, and compression molding the raw material by a press to obtain a green body, wherein the pressure of the press is set to be greater than 150 MPa;

[0039] S3, drying and molding: drying the green body at 60-65°C for 8-12 hours to melt the mixture, thereby obtaining a green body of the integral heating module;

[0040] S4, drying and dehydration: continuing to heat the integral heating module green body to 120-150° C., keeping it dry for more than 9 hours, and draining the moisture in the integral heating module green body;

[0041] S5, sintering: sintering the integral heating module green body after removing moisture in an oxygen-free environment to obtain the integral heating module, wherein the sintering time is controlled within 100 minutes and the sintering temperature is 600-1650°C.

[0042] Furthermore, in step S1, the mass fraction of the mixture is:

[0043] 55 parts of zirconium oxide powder and silicon carbide powder, each accounting for 50%;

[0044] Conductive powder 30;

[0045] Sintering aid 9;

[0046] Mixture 25.

[0047] Furthermore, the conductive powder is one of titanium nitride, zirconium nitride, titanium carbonitride, titanium carbide, zirconium carbide, thallium carbide, hafnium carbide, titanium boride, zirconium boride, thallium boride, hafnium boride, molybdenum silicide, and tungsten carbide.

[0048] Furthermore, the sintering aid is one of talc, potassium feldspar, sodium feldspar, glass powder, magnesium oxide, spodumene, clay, boron oxide, calcium oxide, and aluminum oxide.

[0049] Furthermore, the mixture is one of polyvinyl alcohol, polyvinyl butyral and polyvinyl pyrrolidone.

[0050] Furthermore, the liquid medium is one of water, ethanol, gasoline or an organic solvent.

[0051] Furthermore, the diameter of the particles in the mixture is less than 5 μm.

[0052] The present invention also discloses an electronic cigarette, wherein the heating device of the electronic cigarette is manufactured by the above-mentioned method for preparing the heating device.

[0053] The heating device disclosed in the present invention has the following advantages due to the use of an integral heating module:

[0054] 1. Fast heating and fast smoking: Compared with the traditional multi-layer heating element, the integral heating module does not have conduction paths such as heating wires, insulation layers and heat-conducting layers. It is composed of only one integral heating plate, which directly heats the tobacco and can quickly transfer heat to the tobacco, making it smoke faster. According to tests, smoke can be produced in 5 to 8 seconds.

[0055] 2. Uniform heating: Since the heat is generated as a whole, there is no specific heating core, which will not cause overburning of the heat-concentrated part. After heating, the tobacco color is uniform and the overall effect is good.

[0056] 3. The heating device has a simple structure and is easy to assemble. It only has two parts: the heating module and the overall heating module. When heating is needed, you only need to assemble the overall heating module on the heating module.

[0057] 4. The heating element has high bending strength and is not easily broken or damaged. Tests have shown that the bending strength of the integrated heating module is 310MPa, the fracture toughness is 3.18MPa·m 1 / 2, and the Vickers hardness is 12.68GPa.

[0058] 5. Low cost. Since the integral heating module does not have heating wire, insulation layer and heat conducting layer, it is only composed of an integral heating plate. The structure is very simple, so the cost is relatively low.

[0059] The electronic cigarette disclosed in the present invention has the advantages of fast heating, fast smoking and uniform heating due to the use of an integral heating module. At the same time, the electronic cigarette also has the advantage of easy assembly.

[0060] The present invention discloses a method for preparing a heating device. The integral heating module prepared by the method has the advantages of fast heating, fast smoke generation, uniform heating, anti-bending and high strength.

[0061] The electronic cigarette disclosed in the present invention has a heating device prepared by the preparation method. Therefore, the electronic cigarette prepared by the preparation method also has the advantages of fast heating, fast smoking, uniform heating, anti-bending and high strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a schematic diagram of the present invention;

[0063] Figure 2 This is a structural diagram of the first embodiment of the technical solution of the present invention;

[0064] Figure 3 for Figure 2 A detailed structural diagram of the electrode assembly 2;

[0065] Figure 4 for Figure 2 Stereoscopic image of

[0066] Figure 5 is a structural diagram of a second embodiment of the present invention;

[0067] Figure 6 for Figure 5 Stereoscopic image.

[0068] In the figure, the names of the components and their corresponding serial numbers are: mounting base 1, first elastic groove 10, second elastic groove 11, card slot 12, electrode assembly 2, positive electrode 21, first elastic groove 210, second elastic groove 220; negative electrode 22, integral heating module 3, heating part 31, first electrode contact module 32, second electrode contact module 33, first anti-slip groove 34, second anti-slip groove 35, through groove 36, strip block 37, embedding hole 38, electrode embedding column 4. DETAILED DESCRIPTION

[0069] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0070] refer to Figure 1The present invention discloses an integral heating device, comprising: an integral heating module and a heating module. The integral heating module is made of an integral heating material with electrical conductivity and thermal conductivity, for example, it can be a whole piece of integral heating material plate. The integral heating module and the heating module are connected, and the heating module provides a heat source for the integral heating module. Since the integral heating module is made of an integral heating material, there are no heating wires, insulating layers, heat-conducting layers and other conduction paths in the structure, and it is only composed of an integral heating plate, so the smoking speed is faster. According to tests, the integral heating module can be heated by the heating module, and smoke can be produced in 5 to 8 seconds, thereby achieving the purpose of rapid smoking. Moreover, the heating device has a simple structure and is easy to assemble. It only needs to mechanically connect the integral heating module to the heating module. After the heating module is working, it can evenly heat the integral heating module. After testing, the bending strength of the overall heating module is 310MPa, the fracture toughness is 3.18MPa·m 1 / 2, the Vickers hardness is 12.68GPa, and the resistivity is 2.7×10^-6Ω·m. It has good mechanical properties and excellent electrical and thermal conductivity. At the same time, since the heating is carried out using the overall heating module, there is no specific heating core, which will not cause overburning of the heat concentrated part. After heating, the tobacco color is uniform and the overall effect is good. The heating module here can be an electric heating module, an electromagnetic induction heating module, a thermal radiation heating module, or heating using natural energy, and there is no restriction here.

[0071] As one of the embodiments, the heating module is preferably selected to utilize electrode heating, and the heating module includes: a power supply and an electrode assembly. One end of the electrode assembly is connected to the power supply, and the other end is connected to the overall heating module. When the power supply is in the on state, the power supply heats the overall heating module through the electrode assembly. Since the overall heating module is made of an integral heating material, it does not require any insulating layer or resistance, making the overall heating device simple, simple to manufacture and assemble, strong in bending resistance, shortening the heat transfer path, and fast in smoking. Test data shows that the heating element only takes 5 to 8 seconds to work. The power supply mentioned here can be AC ​​power, a mobile power supply, a lead-acid battery, a lithium battery, or other dry batteries, and there is no restriction here.

[0072] The material of the integral heating module in the embodiment of the present invention is made of main material, modified material and self-sintering auxiliary material through a series of processes (for a description of the process, refer to the preparation method of the integral heating module described later in the specification).

[0073] The main material is selected from non-conductive metal oxides, such as aluminum oxide, zirconium oxide, silicate minerals, quartz and other ceramic materials. Among them, the silicate mineral is preferably feldspar.

[0074] There are preferably two types of modified materials: one is conductive powder for improving conductivity, and the conductive powder is selected from at least one of titanium nitride, zirconium nitride, titanium carbonitride, titanium carbide, zirconium carbide, thallium carbide, hafnium carbide, titanium boride, zirconium boride, thallium boride, hafnium boride, molybdenum silicide, and tungsten carbide. In the embodiment of the present invention, the conductive powder is exemplarily selected from titanium boride; the other is a high-temperature resistant material for improving thermal conductivity. In the embodiment of the present invention, silicon carbide is exemplarily used. This is because the thermal conductivity of zirconium oxide is 1000°C, 2.09W / (m·K), which is actually an insulating material. It needs to be doped with silicon carbide with good thermal conductivity to improve the thermal conductivity. The thermal conductivity of silicon carbide is 16.7W / (mk), which is 8 times that of zirconium oxide. Therefore, the appropriate addition of silicon carbide will effectively improve the thermal conductivity of the heating element.

[0075] Self-sintering auxiliary materials include a sintering aid, a mixing agent, and a solvent. The sintering aid is designed to effectively lower the sintering temperature and can be selected from talc, potassium feldspar, sodium feldspar, glass powder, magnesium oxide, spodumene, clay, boron oxide, calcium oxide, or aluminum oxide. Their recrystallization temperatures are lower than that of zirconium oxide. The mixing agent is an adhesive selected to facilitate mold formation. The material binder is polyvinyl alcohol (PVA), polyvinyl butyral (PVB), polyvinyl pyrrolidone (PVP), or other organic glues. The active ingredient content of the mixing agent is 3-10 wt%. The solvent is also a humidity regulator and can be water, ethanol, gasoline, or other organic solvents. The choice of water or an organic solvent depends on whether the mixing agent is water-soluble. The solvent's function is to smoothly bind the mixed powders together for molding.

[0076] The aforementioned overall heating module is divided into a heating portion and an electrode contact portion. This division is artificial, but in reality, they are made of the same materials and using the same process. The electrode contact portion is connected to the electrode assembly and its purpose is to receive heat energy converted from electrical energy from the electrode assembly. The heating portion is used to heat the e-cigarette at a low temperature, allowing the nicotine and other flavor substances in the tobacco to evaporate without generating solid particles, only producing atomized vapor.

[0077] The following is a detailed description of two embodiments involved in the present invention.

[0078] Example 1:

[0079] refer to Figure 2A heating device with integral heating comprises: an electrode assembly 2 and an integral heating module 3 with electrical conductivity and thermal conductivity, wherein the electrode assembly 2 is connected to a power supply. As a preferred embodiment, the integral heating module 3 is a substantially inverted U-shaped plate. Figure 4 , the electrode assembly 2 includes a positive electrode 21 and a negative electrode 22, and the two vertical sides of the inverted U-shaped plate are respectively connected to the positive electrode 21 and the negative electrode 22, and a through groove 36 is provided in the middle position between the two vertical sides, and the depth of the through groove 36 is the thickness of the U-shaped plate. The through groove 36 extends from the upper middle part of the U-shaped plate to the bottom, that is, the through groove 36 is on the vertical center axis of the U-shaped plate. The purpose of doing this is to be able to connect the two lower ends of the U-shaped plate to the positive electrode 21 and the negative electrode 22 respectively. It should be noted that the positions of the positive electrode 21 and the negative electrode 22 can be interchanged, for example: it can be the negative electrode 22 and the positive electrode 21, and there is no limitation here. Specifically, refer to Figure 2 The upper portion of the integral heating module 3, which is an inverted U-shaped plate, serves as the heating portion 31, while the lower portion serves as the electrode contact portion. The electrode contact portions are located at two locations: a first electrode contact module 32 and a second electrode contact module 33, located at the lower ends of the two vertical sides of the inverted U-shaped plate. The first electrode contact module 32 is inserted into the first elastic groove 210 of the positive electrode 21, and the second electrode contact module 33 is inserted into the second elastic groove 220 of the negative electrode 22. After the first and second electrode contact modules 32, 33 are inserted into the first and second elastic grooves 210, 220, respectively, the heating module is activated to heat the integral heating module. This allows the integral heating module 3 to be heated quickly and evenly, effectively heating the tobacco evenly and quickly.

[0080] It should be noted that the U-shaped plate of the integral heating module 3 is merely exemplary and the integral heating module 3 may also be in other shapes, such as concave, annular, or half-moon, which is not limited here.

[0081] refer to Figure 2 and Figure 3 The integral heating device also includes a mounting base assembly. The mounting base assembly includes a mounting base 1. The positive electrode 21 and the negative electrode 22 are connected to the mounting base 1 in the following manner: the lower end of the positive electrode 21 is mounted in the first elastic groove 10 at the upper end of the mounting base 1, and the lower end of the negative electrode 22 is mounted in the second elastic groove 11 at the upper end of the mounting base 1. The first elastic groove 10 and the second elastic groove 11 have identical specifications and are arranged side by side. The lower end of the mounting base 1 is also electrically connected to a power supply. The power supply supplies power to the integral heating module 3 through the positive electrode 21 and the negative electrode 22.

[0082] refer to Figure 2The mounting base assembly also includes an insulating jacket (not shown) installed on the outer circumference of the mounting base 1. The purpose of installing the insulating jacket is to prevent the user from getting an electric shock when touching the mounting base 1. The material of the insulating jacket can be various non-metallic materials that prevent conductivity, such as 3240 epoxy board, epoxy rod, epoxy tube, FR-4 board, SMC (insulating board, i.e. Sheetmolding compound) board, bakelite board, diphenyl ether board, silicone board, cold stamping board, PC (Polycarbonate) board and PC endurance board. A card slot 12 is also provided on the outer circumference of the mounting base 1. The card slot 12 is used to install the mounting base 1 on other devices of the electronic cigarette, so that the mounting base 1 and the electrode group connected to the mounting base 1 and the overall heating module 3 are effectively fixed as a whole.

[0083] refer to Figure 4 , a first anti-slip groove 34 is provided on the first electrode contact module 32 of the overall heating module 3, and a second anti-slip groove 35 is provided on the second electrode contact module 33. The first anti-slip groove 34 and the second anti-slip groove 35 are symmetrical with respect to the vertical center line of the U-shaped plate. The openings of the first anti-slip groove 34 and the second anti-slip groove 35 are both outward relative to the vertical center line of the U-shaped plate. As one embodiment thereof, the first anti-slip groove 34 and the second anti-slip groove 35 are both semicircular opening grooves, and of course they can also be other semicircular arc opening grooves, such as circular arc openings, concave openings or V-shaped openings. It can be understood that the first anti-slip groove 34 cooperates with the positive electrode 21, and the second anti-slip groove 35 cooperates with the negative electrode 22, which can prevent the overall heating module 3 from moving up and down in the positive electrode 21 and the negative electrode 22, thereby increasing the stability of the installation of the overall heating module 3.

[0084] Example 2

[0085] refer to Figure 5, what is different from Example 1 is that the structure of the overall heating module 3 has changed. At the same time, the structure of the electrode assembly 2 is also different from that of Example 1. Specifically, the overall heating module 3 is also an inverted U-shaped plate structure. The difference is that a strip block 37 is provided at the lower end of each vertical side of the inverted U-shaped plate. As one embodiment, the strip block 37 can be embedded in the lower end of the two vertical sides of the U-shaped plate, or it can be processed integrally with the U-shaped plate. Of course, it can be understood that the material of the strip block 37 is the same as that of the U-shaped plate, and it also has electrical conductivity and thermal conductivity. An embedding hole 38 is processed on the lower surface of each strip block 37. The two embedding holes 38 are respectively used for inserting the upper ends of the two electrode embedding columns 4. The lower ends of the two electrode embedding columns 4 are inserted into the first elastic groove 10 and the second elastic groove 11 at the upper end of the mounting base 1. The upper ends of the two electrode embedded columns 4 are respectively embedded in the two embedded holes 38, and the lower ends are respectively inserted into the first elastic groove 10 and the second elastic groove 11, so that the power supply can supply power to the entire heating module 3 through the two electrode embedded columns 4. It should be noted that the two electrode embedded columns 4 are divided into a positive electrode embedded column and a negative electrode embedded column.

[0086] It should be noted that the contact portion of one embedded hole 38 that contacts one electrode embedded column 4 needs to be treated with silver paste, and the contact portion of another embedded hole 38 that contacts another electrode embedded column 4 also needs to be treated with silver paste. The purpose is to make the electrical and thermal conductivity between the electrode embedded column 4 and the overall heating module 3 better when connected, and to increase the solderability between the electrode embedded column 4 and the overall heating module 3.

[0087] In summary, the heating device disclosed in the present invention has the following advantages:

[0088] 1. Fast heating and quick smoking. Compared with traditional multi-layer heating elements, the integral heating element does not have a heating wire, insulation layer, heat-conducting layer, and other conduction paths. It is composed of a single integral heating plate, which directly heats the tobacco and can quickly transfer heat to the tobacco, making it smoke faster, with smoke coming out in 5 to 8 seconds. This also reduces costs.

[0089] 2. Uniform heating. Since the heating is done as a whole, there is no specific heating core, which will not cause overburning of the heat concentrated part. After heating, the tobacco color is uniform and the overall effect is good.

[0090] 3. The heating device has a simple structure and is easy to assemble. It only consists of a heating element, an electrode and a mounting base, making assembly and manufacturing more convenient.

[0091] 4. The heating element has high bending strength and is not easy to break or damage.

[0092] The present invention also discloses an electronic cigarette (not shown), which includes the aforementioned integral heating device. Because the electronic cigarette is equipped with an integral heating device, its structure is effectively optimized, heating speed is relatively fast, and heating of the tobacco is relatively uniform.

[0093] The present invention also discloses a method for preparing a heating device, comprising:

[0094] Prepare the heating module and the overall heating module, wherein the steps of preparing the overall heating module are as follows:

[0095] S1, prepare raw materials:

[0096] The ingredients are prepared according to the following components and parts by mass to obtain a mixture:

[0097] Zirconia powder and silicon carbide powder 50-75% in total;

[0098] Conductive powder 10-45;

[0099] Sintering aid 5-10;

[0100] Mixture 10-30;

[0101] The mixture and the liquid medium are stirred and mixed in a mass ratio of 1:0.5-1 to obtain a raw material;

[0102] S2, compression molding: placing the raw materials into a mold and compression molding them by a press to obtain a green body, with the pressure of the press set to greater than 150 MPa;

[0103] S3, drying and molding: drying the green body at 60-65°C for 8-12 hours to melt the mixture and obtain the green body of the integral heating module;

[0104] S4, drying and dehydration: continue to heat the whole heating module green body to 120-150 ° C, keep drying for more than 9 hours, and drain the moisture in the whole heating module green body;

[0105] S5, sintering: the integral heating module green body after removing moisture is sintered in an oxygen-free environment to obtain an integral heating module, wherein the sintering time is controlled within 100 minutes and the sintering temperature is 600-1650°C.

[0106] In step S1, the mixing ratio of the zirconium oxide powder and the silicon carbide powder is not limited and can be any ratio, for example, 80% zirconium oxide powder and 20% silicon carbide powder, or 80% silicon carbide powder and 20% zirconium oxide powder. As an example, a 50% ratio of zirconium oxide powder to silicon carbide powder is optimal.

[0107] Since the mixture in step S1 contains zirconium oxide powder and silicon carbide powder, the obtained zirconium oxide ceramic has good electrical conductivity and thermal conductivity, and can quickly heat tobacco. According to tests, the zirconium oxide ceramic only takes 5 to 8 seconds to complete the tobacco heating process of the electronic cigarette. In addition, after testing the zirconium oxide ceramics prepared by the above method, the measured resistivity was 0.5×10^-6Ω·m. The zirconium oxide ceramics prepared by the above method have very small gaps between the several particles constituting the zirconium oxide ceramics, and are relatively dense, and the density is greater than that of zirconium oxide ceramics with gaps.

[0108] In the above mixture formula, the mass fraction of each component can be further optimized as follows:

[0109] Zirconia powder and silicon carbide powder total 55 parts, of which each accounts for half;

[0110] Conductive powder 30;

[0111] Sintering aid 9;

[0112] Mixture 20-25.

[0113] After testing, the overall heating module produced after optimizing the components had a bending strength of 310 MPa, a fracture toughness of 3.18 MPa·m 1 / 2, a Vickers hardness of 12.68 GPa, and a resistivity of 2.7×10^-6Ω·m. This shows that after optimizing the components, the resistivity increased from 0.5×10^-6Ω·m to 2.7×10^-6Ω·m, greatly improving the conductivity of the overall heating module.

[0114] As a preferred embodiment, the conductive powder is selected from at least one of titanium nitride, zirconium nitride, titanium carbonitride, titanium carbide, zirconium carbide, thallium carbide, hafnium carbide, titanium boride, zirconium boride, thallium boride, hafnium boride, molybdenum silicide, and tungsten carbide. In the embodiment of the present invention, the conductive powder is exemplarily selected from titanium boride. The conductive powder in the embodiment of the present invention can also be selected from another high-temperature resistant material that improves the thermal conductivity coefficient. The high-temperature resistant material is exemplarily silicon carbide. This is because the thermal conductivity of zirconium oxide is 1000°C, 2.09W / (m·K), which is actually an insulating material. It needs to be doped with silicon carbide with good thermal conductivity to improve the thermal conductivity. The thermal conductivity of silicon carbide is 16.7W / (mK), which is 8 times that of zirconium oxide. Therefore, the appropriate addition of silicon carbide will effectively improve the thermal conductivity of the heating element.

[0115] The sintering aid is to effectively reduce the sintering temperature, and preferably one of talc, potassium feldspar, sodium feldspar, glass powder, magnesium oxide, spodumene, clay, boron oxide, calcium oxide, and aluminum oxide is selected.

[0116] The mixture is an adhesive selected to better enable the mold to be formed. Its material is polyethylene polyvinyl butyral, polyvinyl pyrrolidone or other organic glue.

[0117] The liquid medium can be water, ethanol, gasoline or other organic solvents. Whether water or organic solvent is used depends on whether the mixture is water-soluble. The function of the liquid medium is to be able to bond and form smoothly with the above mixture.

[0118] It should be noted that in order to ensure that the zirconium oxide powder, modifier, sintering aid and mixing agent involved in the above mixture are mixed evenly and are more conducive to stirring with the organic solvent, the diameter of the mixture is required to be less than 5 μm.

[0119] The aforementioned zirconia ceramic is one embodiment of the integral heating material of the present invention. It should be noted that the integral heating material of the present invention can also be made of other materials, such as lanthanum chromate heating material, graphite gasket, etc.

[0120] By using this method, an integral heating material can be manufactured, which has the following advantages:

[0121] 1. Fast heating and quick smoking. Compared with traditional multi-layer heating elements, the integral heating element does not have heating wires, insulation layers, heat-conducting layers, and other conduction paths. It is composed of a single integral heating plate, which directly heats the tobacco and can quickly transfer heat to the tobacco, making it smoke faster, with smoke coming out in 5 to 8 seconds. This also reduces costs.

[0122] 2. Uniform heating. Since the heating is done as a whole, there is no specific heating core, which will not cause overburning of the heat concentrated part. After heating, the tobacco color is uniform and the overall effect is good.

[0123] 3. The heating element has high bending strength and is not easy to break or damage.

[0124] The present invention also discloses an electronic cigarette, the heating device of which is manufactured by the above-mentioned heating device manufacturing method. Therefore, the electronic cigarette manufactured by this manufacturing method also has the advantages of fast heating, fast smoking, uniform heating, high bending strength, and is not easy to break or damage.

[0125] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A heating device, characterized in that: include: A heating module and an integral heating module having electrical and thermal conductivity, wherein the integral heating module and the heating module are mechanically connected, the heating module provides a heat source for the integral heating module, and the integral heating module uniformly heats the tobacco in the electronic cigarette; The heating module includes a power supply and an electrode assembly, one end of the electrode assembly is connected to the power supply, and the other end of the electrode assembly is connected to the integral heating module; The integral heating module comprises an integrally formed heating portion and an electrode contact portion, wherein the electrode contact portion is connected to the electrode assembly and the heating portion is exposed to the electrode assembly; The electrode assembly is a positive electrode plug-in block and a negative electrode plug-in block, the integral heating module is an inverted U-shaped plate, and the heating part is located at the upper end of the inverted U-shaped plate; The electrode contact portion is a first electrode contact module and a second electrode contact module respectively located at the lower ends of the two vertical sides of the U-shaped plate, and a through groove extending from the middle and upper part of the U-shaped plate to the bottom is provided on the vertical center axis of the U-shaped plate; The heating device further comprises a mounting seat assembly, wherein the mounting seat assembly comprises a mounting seat; The first electrode contact module is provided with a first anti-slip groove that is horizontally open outward, and the second electrode contact module is provided with a second anti-slip groove that is horizontally open outward. The first anti-slip groove and the second anti-slip groove are symmetrical with respect to the vertical center line of the U-shaped plate. The first electrode contact module is inserted into the first groove at the upper end of the positive electrode plug-in block, and the second electrode contact module is inserted into the second groove at the upper end of the negative electrode plug-in block. The lower end of the positive plug-in block is inserted into the first elastic groove at the upper end of the mounting seat, and the lower end of the negative plug-in block is inserted into the second elastic groove at the upper end of the mounting seat. The first elastic groove and the second elastic groove are arranged side by side.

2. The heating device according to claim 1, wherein The mounting seat assembly further includes an insulating jacket arranged on the outside of the mounting seat.

3. An electronic cigarette, characterized in that: The electronic cigarette comprises the heating device according to claim 1 or 2.

4. A method for preparing the heating device according to claim 1 or 2, characterized in that: The steps include: A heating module and an integral heating module with electrical conductivity and thermal conductivity are prepared separately. The specific steps of preparing the integral heating module with electrical conductivity and thermal conductivity are as follows: S1, prepare raw materials; The ingredients are prepared according to the following components and parts by mass to obtain a mixture: Zirconia powder and silicon carbide powder 50-75% in total; Conductive powder 10-45; sintering aid 5-10; Mixture 10-30; The mixture and the liquid medium were stirred and mixed at a mass ratio of 1:0.5-1 to obtain the Describe the raw materials; S2, compression molding: placing the raw material into a mold, and compression molding the raw material by a press to obtain a green body, wherein the pressure of the press is set to be greater than 150 MPa; S3, drying and molding: drying the green body at 60-65° C. for 8-12 hours to melt the mixture, thereby obtaining a green body of the integral heating module; S4, drying and dehydration: continuing to heat the integral heating module green body to 120-150° C., keeping it dry for more than 9 hours, and draining the moisture in the integral heating module green body; S5, sintering: sintering the integral heating module green body after removing moisture in an oxygen-free environment to obtain the integral heating module, wherein the sintering time is controlled within 100 minutes and the sintering temperature is 600-1650°C.

5. The method for preparing the heating device according to claim 4, wherein: In step S1, the mass fraction of the mixture is: Zirconia powder and silicon carbide powder total 55 parts, with each accounting for 50%; Conductive powder 30; Sintering aid 9; Mixture 25.

6. The method for preparing the heating device according to claim 4 or 5, wherein: The conductive powder is one of titanium nitride, zirconium nitride, titanium carbonitride, titanium carbide, zirconium carbide, thallium carbide, hafnium carbide, titanium boride, zirconium boride, thallium boride, hafnium boride, molybdenum silicide, and tungsten carbide.

7. The method for preparing a heating device according to claim 4 or 5, characterized in that: The sintering aid is one of talc, potassium feldspar, sodium feldspar, glass powder, magnesium oxide, spodumene, clay, boron oxide, calcium oxide, and aluminum oxide.

8. The method for preparing a heating device according to claim 4 or 5, wherein: The mixing agent is one of polyvinyl alcohol, polyvinyl butyral and polyvinyl pyrrolidone.

9. The method for preparing the heating device according to claim 4 or 5, characterized in that: The liquid medium is an organic solvent.

10. The method for preparing a heating device according to claim 4 or 5, characterized in that: The diameters of the particles in the mixture are all less than 5 μm.

11. An electronic cigarette, characterized in that: The heating device of the electronic cigarette is prepared by the preparation method according to any one of claims 4 to 10.

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