Atomizing core and electronic atomizer

Abstract

The atomizing core comprises an oil storage body, a heating piece, a preheating piece and a porous base body, the oil storage body comprises an oil storage pipe and a blocking part arranged at the bottom of the oil storage pipe, an oil storage cavity used for storing tobacco tar is formed in the oil storage pipe, the porous base body is fixedly connected with the bottom of the oil storage body, and oil guide holes corresponding to the porous base body are formed in the blocking part; the heating element comprises a heating and atomizing part, the heating and atomizing part is arranged on the lower surface of the porous substrate, and the heating and atomizing part is used for heating and atomizing tobacco tar after being electrified; the preheating part comprises a preheating part, the preheating part is embedded in the oil storage pipe, and the preheating part is used for heating after being electrified so as to preheat the tobacco tar in the oil storage cavity. The atomizing core can preheat tobacco tar, and the problems that high-viscosity tobacco tar is low in tar guiding speed and prone to being burnt are solved. The utility model further provides an electronic atomizer.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic atomizers, in particular to an atomization core and an electronic atomizer. Background Art

[0002] Electronic atomizers are also known as virtual cigarettes, steam cigarettes, aerosol generating devices, electronic cigarettes, etc. They are mainly used to simulate the feeling of smoking without affecting health, so as to help people quit smoking or replace cigarettes. The atomizer core is one of the important components of the electronic atomizer. Its main function is to heat the atomized oil to generate smoke for users to inhale.

[0003] The current atomizer core generally includes a porous ceramic substrate and a heating substrate arranged on the porous ceramic substrate. The heating substrate is generally a structure such as a resistor film, a heating wire, or a heating mesh. The heating substrate heats the porous ceramic substrate by direct contact to heat and atomize the tobacco oil in the porous ceramic substrate.

[0004] At present, porous ceramic substrates are generally sintered with diatomaceous earth as the main component. This type of porous ceramic substrate has the advantages of fine atomized particles and good suction feeling. However, due to its own low thermal conductivity (its thermal conductivity is generally below 1.0W / (m·K)), the heat conduction rate is slow, the surface temperature of the porous ceramic substrate in contact with the heating substrate is high, and the temperature of the part of the porous ceramic substrate far away from the heating substrate is low, which makes the porous ceramic substrate have poor preheating ability for the e-liquid (especially the e-liquid on the side of the porous ceramic substrate far away from the heating substrate) and slow oil conduction rate. Therefore, this type of atomizer core is more difficult to atomize high-viscosity e-liquid with high viscosity and poor fluidity, and it is easy to produce a burnt smell. Utility Model Content

[0005] The utility model aims to provide an atomization core, which can preheat the e-liquid and improve the problems of slow oil conduction rate and easy occurrence of burnt smell of high-viscosity e-liquid.

[0006] The utility model provides an atomizer core, comprising an oil storage body, a heating element, a preheating element and a porous matrix, wherein the oil storage body comprises an oil storage pipe and a barrier portion arranged at the bottom of the oil storage pipe, wherein an oil storage cavity for storing tobacco oil is arranged in the oil storage pipe, and the oil storage cavity is located above the barrier portion; the porous matrix is ​​located below the barrier portion, and the porous matrix is ​​fixedly connected to the bottom of the oil storage body, and the barrier portion is provided with an oil guide hole corresponding to the porous matrix;

[0007] The heating element includes a heating atomization part, which is arranged on the lower surface of the porous substrate, and is used to generate heat after power is turned on to heat and atomize the tobacco oil; the preheating element includes a preheating part, which is embedded in the oil storage pipe, and is used to generate heat after power is turned on to preheat the tobacco oil in the oil storage chamber.

[0008] In one achievable manner, the porous matrix is ​​fixedly connected to the lower surface of the barrier portion.

[0009] In one feasible manner, an oil storage tank is provided on the upper surface of the porous substrate, and the oil guide hole is connected to the oil storage tank; the porous substrate includes a boss arranged around the periphery of the oil storage tank, and the boss is bonded and fixed to the lower surface of the barrier portion by a first glass material.

[0010] In a feasible manner, a containing cavity is further provided in the oil storage pipe, the containing cavity is located below the blocking portion, and at least a portion of the porous matrix is ​​located in the containing cavity.

[0011] In one achievable manner, there is a gap between the outer wall of the porous matrix and the inner wall of the oil storage tube, and the gap is filled with a second glass material.

[0012] In one achievable manner, the heating element further includes an auxiliary heating portion connected to the heating atomization portion, and the auxiliary heating portion is embedded in the porous matrix.

[0013] In one feasible manner, an oil storage tank is provided on the upper surface of the porous matrix, and the oil guide hole is connected to the oil storage tank; the porous matrix includes a boss arranged around the periphery of the oil storage tank, and the auxiliary heating part extends from the lower surface of the porous matrix to the inside of the boss.

[0014] In one achievable manner, the oil storage body is made of dense ceramic material or dense glass material.

[0015] In one achievable manner, the oil storage pipe includes an inner pipe and an outer pipe sleeved outside the inner pipe, and the preheating part is arranged between the inner pipe and the outer pipe.

[0016] The utility model also provides an electronic atomizer, comprising the above-mentioned atomization core.

[0017] The atomizer core provided by the utility model is provided with an oil storage body, the oil storage body includes an oil storage pipe and a barrier portion arranged at the bottom of the oil storage pipe, the barrier portion is provided with an oil guide hole corresponding to the porous substrate, and the oil storage cavity in the oil storage pipe is used to store oil; at the same time, a preheating part is provided, the preheating part includes a preheating part, and the preheating part can generate heat after power is turned on to preheat the oil in the oil storage cavity, so that the oil in the oil storage cavity is quickly liquefied and transferred to the porous substrate through the oil guide hole for atomization, thereby improving the problem of slow oil conduction rate and easy occurrence of burnt smell of high-viscosity oil, improving the atomization efficiency and atomization amount of the atomizer core, and meeting the user's use requirements of large smoke volume. Moreover, since the heating atomization part is arranged on the lower surface of the porous substrate, the temperature of the porous substrate is relatively high during operation, while the temperature of the oil storage pipe is relatively low, so the preheating part is arranged in the oil storage pipe, which can better preheat the oil in the oil storage cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the atomizer core in the embodiment of the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the atomizer core in another direction in an embodiment of the utility model.

[0020] Figure 3 for Figure 2 Schematic diagram of the explosion structure.

[0021] Figure 4 for Figure 2 Schematic cross-section of .

[0022] Figure 5 It is a schematic structural diagram of the preheating part in the embodiment of the utility model.

[0023] Figure 6 It is a schematic diagram of the structure of the heating element in the embodiment of the utility model.

[0024] Figure 7 It is a schematic diagram of the structure of the porous matrix in the embodiment of the utility model.

[0025] Figure 8 It is a cross-sectional schematic diagram of an atomizer core in another embodiment of the utility model. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the utility model are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection claimed by the utility model.

[0029] like Figures 1 to 4 As shown, the atomizer core provided by the embodiment of the utility model is used in an electronic atomizer. The atomizer core includes an oil storage body 1, a heating element 2, a preheating element 3 and a porous matrix 4. The oil storage body 1 includes an oil storage tube 11 and a barrier portion 12 arranged at the bottom of the oil storage tube 11, and the barrier portion 12 is fixedly connected to the oil storage tube 11; the oil storage tube 11 is a tubular structure, and an oil storage chamber 11A for storing tobacco oil is provided in the oil storage tube 11, and the oil storage chamber 11A is located above the barrier portion 12 (that is, the oil storage chamber 11A is formed by the oil storage tube 11 and the barrier portion 12), and the tobacco oil in the electronic atomizer is stored in the oil storage chamber 11A. The porous matrix 4 is made of porous material (i.e., the porous matrix 4 has a plurality of micropores; the porous matrix 4 can be made of porous ceramic material or porous glass material), the porous matrix 4 is located below the barrier 12, and the porous matrix 4 is fixedly connected to the bottom of the oil storage body 1, and the barrier 12 is provided with an oil guide hole 121 corresponding to the porous matrix 4. The tobacco oil stored in the oil storage cavity 11A can be transferred to the porous matrix 4 through the oil guide hole 121.

[0030] The heating element 2 includes a heating atomization part 21, which is arranged on the lower surface of the porous substrate 4, and is used to generate heat after power is turned on to heat and atomize the smoke oil. The preheating element 3 includes a preheating part 31, which is embedded in the oil storage tube 11, and is arranged corresponding to the oil storage cavity 11A, and is used to generate heat after power is turned on to preheat the smoke oil in the oil storage cavity 11A.

[0031] Specifically, the atomizer core provided in the present embodiment is provided with an oil storage body 1, the oil storage body 1 includes an oil storage tube 11 and a barrier portion 12 arranged at the bottom of the oil storage tube 11, and the barrier portion 12 is provided with an oil guide hole 121 corresponding to the porous matrix 4, and the oil storage cavity 11A in the oil storage tube 11 is used to store oil; at the same time, a preheating component 3 is provided, and the preheating component 3 includes a preheating portion 31, and the preheating portion 31 can generate heat after power is turned on to preheat the oil in the oil storage cavity 11A, so that the oil in the oil storage cavity 11A is quickly liquefied and transferred to the porous matrix 4 through the oil guide hole 121 for atomization, thereby improving the problems of slow oil conduction rate and easy occurrence of burnt smell of high-viscosity oil, improving the atomization efficiency and atomization amount of the atomizer core, and meeting the user's demand for large smoke volume. Moreover, since the heating atomization part 21 is arranged on the lower surface of the porous substrate 4, the temperature of the porous substrate 4 is relatively high during operation, while the temperature of the oil storage tube 11 is relatively low. Therefore, the preheating part 31 is arranged in the oil storage tube 11, which can better preheat the tobacco oil in the oil storage chamber 11A.

[0032] As an implementation mode, the oil storage body 1 is made of a dense material. Since there are few or no pores inside the dense material, the smoke oil cannot penetrate the dense material. Therefore, when the smoke oil in the oil storage cavity 11A is heated and liquefied, it can prevent the smoke oil from seeping out from the side wall of the oil storage tube 11, thereby preventing the atomizer core from leaking oil. At the same time, since the surface roughness of the dense material is relatively low, that is, the inner wall of the oil storage tube 11 is relatively smooth, it can reduce or prevent the smoke oil from remaining on the inner wall of the oil storage tube 11, thereby improving the utilization rate of the smoke oil.

[0033] As an implementation mode, the oil storage body 1 is made of dense ceramic material or dense glass material. Of course, in other embodiments, the oil storage body 1 can also be made of other dense materials.

[0034] like Figure 2 , Figure 3 and Figure 7 As shown, as an embodiment, the oil storage pipe 11 is a circular tubular structure, and the porous matrix 4 is a cylindrical structure. Of course, in other embodiments, the oil storage pipe 11 and the porous matrix 4 can also be other shapes.

[0035] like Figures 2 to 4As shown, as an embodiment, the barrier 12 is arranged at the bottom of the oil storage tube 11, and the oil storage tube 11 is also provided with a receiving chamber 11B, which is located below the barrier 12 (i.e., the barrier 12 divides the inner cavity of the oil storage tube 11 into an oil storage chamber 11A and a receiving chamber 11B adjacent to each other up and down), and at least part of the porous matrix 4 is located in the receiving chamber 11B, so as to facilitate the assembly of the porous matrix 4 and the oil storage body 1, and the oil storage tube 11 can play a certain protective role on the porous matrix 4. Of course, in other embodiments, the barrier 12 can also be connected to the bottom end of the oil storage tube 11, and the porous matrix 4 is completely located below the oil storage body 1.

[0036] like Figures 2 to 4 As shown, as an embodiment, the upper surface of the porous matrix 4 is fixedly connected to the lower surface of the barrier portion 12, thereby facilitating the assembly of the porous matrix 4 and the oil storage body 1.

[0037] like Figure 4 and Figure 7 As shown, as an embodiment, the upper surface of the porous substrate 4 and the lower surface of the barrier portion 12 are bonded and fixed by the first glass material 5. Specifically, in this embodiment, the upper surface of the porous substrate 4 is provided with an oil storage tank 41, which is used to temporarily store the tobacco oil, and the oil guide hole 121 is connected to the oil storage tank 41, so the tobacco oil stored in the oil storage cavity 11A can be transferred to the oil storage tank 41 through the oil guide hole 121. The porous substrate 4 includes a boss 42 arranged around the periphery of the oil storage tank 41, and the boss 42 and the lower surface of the barrier portion 12 are bonded and fixed by the first glass material 5. On the one hand, by using the first glass material 5 to encapsulate the porous matrix 4 and the barrier portion 12, the sealing of the combination can be improved, and oil leakage at the combination position of the porous matrix 4 and the barrier portion 12 can be avoided; on the other hand, by setting the porous matrix 4 to the above-mentioned structure, the boss 42 and the barrier portion 12 are bonded and fixed by the first glass material 5 (that is, the first glass material 5 is only set on the upper surface of the boss 42), and the first glass material 5 is not set on the inner wall of the oil storage tank 41, thereby avoiding the first glass material 5 blocking the transmission path of the smoke oil (if the entire upper surface of the porous matrix 4 is provided with the first glass material 5, the smoke oil cannot pass through the first glass material 5 into the porous matrix 4).

[0038] like Figure 8As shown, as another embodiment, the outer diameter of the porous matrix 4 is smaller than the inner diameter of the oil storage tube 11, and there is a gap between the outer wall of the porous matrix 4 and the inner wall of the oil storage tube 11, and the gap is filled with a second glass material 6. On the one hand, the second glass material 6 can further improve the sealing performance of the packaging between the porous matrix 4 and the oil storage body 1, and further avoid oil leakage; on the other hand, the second glass material 6 can further improve the connection strength between the porous matrix 4 and the oil storage body 1, and avoid the porous matrix 4 from falling off or the porous matrix 4 and the oil storage body 1 from being loosely combined. Of course, in other embodiments, the second glass material 6 can also be provided only between the outer wall of the porous matrix 4 and the inner wall of the oil storage tube 11 for packaging. It should be noted that the first glass material 5 and the second glass material 6 are both dense glass materials.

[0039] like Figure 3 and Figure 4 As shown, as an embodiment, the oil storage pipe 11 includes an inner pipe 111 and an outer pipe 112 sleeved outside the inner pipe 111, the inner pipe 111 and the outer pipe 112 are fixed to each other, the barrier part 12 is fixedly connected to the inner pipe 111, and the preheating part 31 is arranged between the inner pipe 111 and the outer pipe 112, so as to facilitate the assembly of the preheating part 31 and the oil storage pipe 11.

[0040] like Figures 3 to 5 As shown, as an embodiment, the preheating part 31 is a heating circuit provided on the outer wall of the inner tube 111 by screen printing. Of course, in other embodiments, the preheating part 31 can also be a heating structure such as a heating net or a heating film.

[0041] As an implementation mode, the barrier portion 12 and the oil storage pipe 11 are of a split structure, and the barrier portion 12 and the oil storage pipe 11 are bonded and fixed by a third glass material (not shown), and the third glass material is a dense glass material (specifically, the outer edge of the barrier portion 12 and the inner wall of the inner pipe 111 are bonded and fixed by the third glass material). Of course, in other embodiments, the barrier portion 12 and the oil storage pipe 11 may also be of an integrated structure.

[0042] like Figure 3 As shown, as an implementation manner, there are multiple oil guide holes 121 , and the multiple oil guide holes 121 are evenly spaced and arranged on the blocking portion 12 .

[0043] like Figure 3 , Figure 4 and Figure 6As shown, as an embodiment, the heating element 2 further includes an auxiliary heating portion 22 connected to the heating atomization portion 21, the auxiliary heating portion 22 extends upwardly and protrudes compared to the heating atomization portion 21, the heating power of the auxiliary heating portion 22 is less than the heating power of the heating atomization portion 21, and the auxiliary heating portion 22 is embedded in the porous matrix 4. The auxiliary heating portion 22 can heat other parts of the porous matrix 4, play a role of auxiliary heating, and thus further improve the atomization efficiency.

[0044] like Figure 4 As shown, as an embodiment, the auxiliary heating portion 22 extends from the lower surface of the porous substrate 4 to the boss 42. Since the boss 42 corresponds to the oil storage tank 41, the auxiliary heating portion 22 can preheat the tobacco oil temporarily stored in the oil storage tank 41, thereby further improving the atomization efficiency.

[0045] like Figure 6 As shown, as an embodiment, the heating atomization part 21 is in a disc-shaped structure as a whole, and the auxiliary heating part 22 is in a strip-shaped structure, and the auxiliary heating part 22 is arranged at the outer edge of the heating atomization part 21. There are multiple auxiliary heating parts 22, and the multiple auxiliary heating parts 22 are arranged at intervals along the circumference of the heating atomization part 21.

[0046] like Figure 6 As shown, as an embodiment, the number of the auxiliary heating parts 22 is two, and the two auxiliary heating parts 22 are respectively arranged on opposite sides of the heating atomization part 21 along the radial direction of the heating atomization part 21.

[0047] like Figure 3 , Figure 4 and Figure 6 As shown, as an embodiment, the heating atomization part 21 is provided with a plurality of upwardly protruding connection ribs 23, and the connection ribs 23 are embedded in the porous matrix 4, thereby further increasing the connection strength between the heating atomization part 21 and the porous matrix 4, and preventing the heating atomization part 21 from falling off. It should be noted that the connection ribs 23 mainly play a connecting role, and do not play a heating role.

[0048] As an implementation mode, the heating atomization part 21, the auxiliary heating part 22 and the connecting rib 23 are an integrated structure.

[0049] like Figure 2 , Figure 3 and Figure 6 As shown, as an embodiment, the heating element 2 further includes two first electrode rods 24, which are respectively connected to the two ends of the heating atomization part 21, and the two first electrode rods 24 extend downward compared to the porous matrix 4. The two first electrode rods 24 are respectively used to be electrically connected to the positive and negative electrodes of the power supply.

[0050] like Figure 6As shown, as an embodiment, a first current collecting portion 25 and a second current collecting portion 26 are respectively provided at both ends of the heating atomization portion 21, and the two first electrode rods 24 are respectively connected to the first current collecting portion 25 and the second current collecting portion 26.

[0051] like Figure 2 , Figure 3 and Figure 5 As shown, as an embodiment, the preheating member 3 further includes two second electrode rods 32, which are respectively connected to the two ends of the preheating portion 31, and the two second electrode rods 32 extend downwards compared to the oil storage pipe 11. The two second electrode rods 32 are respectively used to be electrically connected to the positive and negative electrodes of the power supply.

[0052] As an implementation mode, the heating element 2 and the preheating element 3 can be made of metal materials, such as nickel-chromium, iron-chromium-aluminum, stainless steel, etc.; other materials, such as carbon materials, can also be used.

[0053] like Figure 4 As shown, as an embodiment, the top of the oil storage tube 11 is provided with an opening 110 connected to the oil storage chamber 11A; the atomizer core also includes a sealing cover (not shown), which is arranged at the opening 110 and seals the opening 110. Specifically, the oil can be loaded into the oil storage chamber 11A through the opening 110, and after the oil is loaded, the opening 110 is sealed by the sealing cover to prevent oil leakage. The sealing cover can be, for example, a silicone cover.

[0054] As an embodiment, the components of the porous matrix 4 include a high thermal conductivity material, a skeleton material and a high temperature sintering aid, the high thermal conductivity material is one or more of silicon carbide, silicon nitride and aluminum nitride, the skeleton material is one or more of diatomaceous earth, silica powder, kaolin, cordierite and quartz powder, and the high temperature sintering aid is glass powder (for example, SiO2-B2O3-ZnO glass powder, Tg temperature is 450°C-550°C). The weight percentages of the high thermal conductivity material, the skeleton material and the high temperature sintering aid in the porous matrix 4 are respectively: 0-80% of the high thermal conductivity material, 0-80% of the skeleton material, and 20%-50% of the high temperature sintering aid.

[0055] Preferably, the weight percentages of the high thermal conductivity material, the skeleton material and the high temperature sintering aid in the porous matrix 4 are: 20-60% of the high thermal conductivity material, 15-40% of the skeleton material and 20%-40% of the high temperature sintering aid.

[0056] As an embodiment, the porous matrix 4 is formed by dewaxing and sintering a ceramic green body; the components of the ceramic green body include high thermal conductivity material, skeleton material, high temperature sintering aid, pore former, paraffin and stearic acid. The high thermal conductivity material is one or more of silicon carbide, silicon nitride and aluminum nitride, the skeleton material is one or more of diatomaceous earth, silica powder, kaolin, cordierite and quartz powder, the high temperature sintering aid is glass powder (for example, SiO2-B2O3-ZnO glass powder, Tg temperature is 450℃-550℃), and the pore former is one or more of PMMA, PS balls, starch, lignin, graphite and carbon powder. The weight percentages of the components are: 0-70% of high thermal conductivity material, 0-70% of skeleton material, 10%-40% of high temperature sintering aid, 5%-40% of pore former, 10%-20% of paraffin, 2%-10% of stearic acid, and the sum of the weight percentages of the components is 100%.

[0057] As an implementation mode, the porosity of the porous matrix 4 is 55%-65%, the pore diameter (median pore diameter) of the porous matrix 4 is 25-40 microns, and the oil transmission rate (VG) is 2.0-4.0 uL / s.

[0058] As an embodiment, the preparation method of the atomizer core is:

[0059] S10: preparing an oil storage body 1 and a porous matrix 4 respectively, and compounding the heating element 2 with the porous matrix 4, and compounding the preheating element 3 with the oil storage body 1; wherein the oil storage body 1 comprises an oil storage tube 11 and a barrier portion 12 arranged at the bottom of the oil storage tube 11, an oil storage chamber 11A for storing tobacco oil is arranged in the oil storage tube 11, the oil storage chamber 11A is located above the barrier portion 12, and an oil guide hole 121 is arranged on the barrier portion 12;

[0060] S20: coating glass slurry on the porous substrate 4 (the glass slurry is a B2O3-SiO2-MgO-K2O system), and then placing the porous substrate 4 on the barrier portion 12, so that the porous substrate 4 and the barrier portion 12 are pre-bonded by the glass slurry; drying the porous substrate 4 and the oil storage body 1, and then performing low-temperature packaging (such as keeping warm at 500°C-550°C for 30 minutes) to solidify the glass slurry, thereby obtaining an atomizing core.

[0061] As an embodiment, in the above step S10, the method for preparing the porous substrate 4 comprises the following steps:

[0062] Step 1: Mix and ball-mill a certain amount of high thermal conductivity material, skeleton material, high temperature sintering aid and pore-forming agent (specifically, the high thermal conductivity material, skeleton material, high temperature sintering aid and pore-forming agent can be placed in the same container, and then zirconium balls are added for mixed ball-milling) to obtain a mixed powder; the mixed ball-milling time can be 1-8 hours, preferably 2-4 hours.

[0063] Step 2: Mix the above mixed powder with a certain amount of paraffin wax and stearic acid to obtain a ceramic slurry; the mixing and stirring temperature is 60°C-120°C, and the mixing and stirring time is 2-8 hours.

[0064] Step 3: Place the heating element 2 in the grouting machine in advance, then inject the ceramic slurry into the grouting machine, and obtain the ceramic green body by hot die casting. Specifically, move the stirred slurry into the grouting machine, set the insulation temperature of the grouting machine to 55℃-80℃, stir and degas for 30-60 minutes; hot die cast the slurry under a preset pressure, wherein the preset pressure is specifically 0.3-0.8Mpa.

[0065] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the porous matrix 4 after cooling. The wax is removed by siphoning, the temperature is 180°C-280°C, and the time is 1-6 hours; preferably, the temperature is 200°C-250°C, and the time is 2-4 hours. The sintering temperature is 500°C-800°C, and the time is 2-8 hours; preferably, the sintering temperature is 600°C-750°C, and the time is 3-5 hours.

[0066] As an embodiment, in the above step S10, the method for preparing the oil storage body 1 comprises the following steps:

[0067] Step 1: After mixing inorganic powder particles, dispersant and solvent by ball milling, plasticizer, binder, leveling agent and defoamer are added and dispersed by ball milling to obtain slurry. The inorganic powder particles are one or more of alumina, zirconium oxide and ZTA (zirconia toughened alumina), the dispersant is PVP, the plasticizer is one or more of PEG, DBP and DOP, and the binder is PVB.

[0068] Step 2: vacuum degas the slurry to a reasonable viscosity, and then prepare the slurry into an inner tube green body by tape casting.

[0069] Step 3: Prepare a heating circuit (ie, preheating portion 31 ) on the outer wall of the inner tube green body by screen printing.

[0070] Step 4: Cover the outer wall of the inner tube green body with another layer of slurry to form an outer tube green body, which is then formed into a cylindrical shape by hot isostatic pressing.

[0071] Step 5: Dewaxing and high-temperature sintering are performed on the inner tube green body and the outer tube green body to obtain a dense ceramic tube (ie, the oil storage tube 11).

[0072] Step 6: Coat the inner wall of the dense ceramic tube with glass slurry (the glass slurry is a B2O3-SiO2-MgO system), and then place a dense ceramic sheet with holes (i.e., the barrier portion 12) at the bottom of the dense ceramic tube. The dense ceramic sheet and the inner wall of the dense ceramic tube are pre-bonded with the glass slurry, and then low-temperature sintering is performed (such as keeping warm at 600℃-700℃ for 1 hour) to solidify the glass slurry, thereby obtaining the oil storage body 1.

[0073] As an implementation method, the heating control method of the atomizer core is:

[0074] When starting to work, the heating element 2 and the preheating element 3 are energized at the same time, so that the heating atomization part 21 and the preheating part 31 are heated at the same time to preheat the tobacco oil in the oil storage chamber 11A;

[0075] After working for a period of time, smoke begins to be generated on the atomizer core. At this time, the preheating element 3 is controlled to be intermittently turned on and off (for example, it is powered on once every one minute, and each time it is powered on for a preset time), so that the preheating part 31 intermittently preheats the smoke oil in the oil storage chamber 11A. This arrangement can not only save electricity, but also control the preheating efficiency of the smoke oil, ensuring the balance of supply and demand of the atomizer core.

[0076] This embodiment further provides an electronic atomizer, including the above-mentioned atomizer core, and the tobacco oil in the electronic atomizer is stored in the oil storage chamber 11A of the atomizer core.

[0077] The atomizer core provided in the present embodiment is provided with an oil storage body 1, the oil storage body 1 includes an oil storage tube 11 and a barrier portion 12 arranged at the bottom of the oil storage tube 11, the barrier portion 12 is provided with an oil guide hole 121 corresponding to the porous matrix 4, and the oil storage cavity 11A in the oil storage tube 11 is used to store oil; at the same time, a preheating component 3 is provided, the preheating component 3 includes a preheating portion 31, and the preheating portion 31 can generate heat after power is turned on to preheat the oil in the oil storage cavity 11A, so that the oil in the oil storage cavity 11A is quickly liquefied and transferred to the porous matrix 4 through the oil guide hole 121 for atomization, thereby improving the problems of slow oil guide rate and easy occurrence of burnt smell of high-viscosity oil, improving the atomization efficiency and atomization amount of the atomizer core, and meeting the user's demand for large smoke volume. Moreover, since the heating atomization part 21 is arranged on the lower surface of the porous substrate 4, the temperature of the porous substrate 4 is relatively high during operation, while the temperature of the oil storage tube 11 is relatively low. Therefore, the preheating part 31 is arranged in the oil storage tube 11, which can better preheat the tobacco oil in the oil storage chamber 11A.

[0078] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An atomizer core, characterized in that: The invention comprises an oil storage body (1), a heating element (2), a preheating element (3) and a porous matrix (4); the oil storage body (1) comprises an oil storage pipe (11) and a barrier portion (12) arranged at the bottom of the oil storage pipe (11); an oil storage chamber (11A) for storing tobacco oil is arranged in the oil storage pipe (11); the oil storage chamber (11A) is located above the barrier portion (12); the porous matrix (4) is located below the barrier portion (12); the porous matrix (4) is fixedly connected to the bottom of the oil storage body (1); and the barrier portion (12) is provided with an oil guide hole (121) corresponding to the porous matrix (4); The heating element (2) comprises a heating atomization part (21), the heating atomization part (21) is arranged on the lower surface of the porous substrate (4), and the heating atomization part (21) is used to generate heat after power is turned on to heat and atomize the tobacco oil; the preheating element (3) comprises a preheating part (31), the preheating part (31) is embedded in the oil storage pipe (11), and the preheating part (31) is used to generate heat after power is turned on to preheat the tobacco oil in the oil storage chamber (11A).

2. The atomizer core according to claim 1, characterized in that: The porous matrix (4) is fixedly connected to the lower surface of the barrier portion (12).

3. The atomizer core according to claim 2, characterized in that: An oil storage groove (41) is provided on the upper surface of the porous matrix (4), and the oil guide hole (121) is connected to the oil storage groove (41); the porous matrix (4) comprises a boss (42) arranged around the periphery of the oil storage groove (41), and the boss (42) is bonded and fixed to the lower surface of the barrier portion (12) by a first glass material (5).

4. The atomizer core according to claim 1, characterized in that: The oil storage pipe (11) is further provided with a containing chamber (11B), the containing chamber (11B) being located below the blocking portion (12), and at least a portion of the porous matrix (4) being located in the containing chamber (11B).

5. The atomizer core according to claim 4, characterized in that: There is a gap between the outer wall of the porous matrix (4) and the inner wall of the oil storage tube (11), and the gap is filled with a second glass material (6).

6. The atomizer core according to claim 1, characterized in that: The heating element (2) further comprises an auxiliary heating portion (22) connected to the heating atomization portion (21), and the auxiliary heating portion (22) is embedded in the porous matrix (4).

7. The atomizer core according to claim 6, characterized in that: An oil storage groove (41) is provided on the upper surface of the porous substrate (4), and the oil guide hole (121) is connected to the oil storage groove (41); the porous substrate (4) includes a boss (42) arranged around the periphery of the oil storage groove (41), and the auxiliary heating portion (22) extends from the lower surface of the porous substrate (4) to the inside of the boss (42).

8. The atomizer core according to claim 1, characterized in that: The oil storage body (1) is made of dense ceramic material or dense glass material.

9. The atomizer core according to any one of claims 1 to 8, characterized in that: The oil storage pipe (11) comprises an inner pipe (111) and an outer pipe (112) sleeved outside the inner pipe (111), and the preheating part (31) is arranged between the inner pipe (111) and the outer pipe (112).

10. An electronic atomizer, characterized in that: The invention comprises an atomizing core as claimed in any one of claims 1 to 9.

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