Atomizing core and electronic atomizer

Abstract

The utility model provides an atomizing core which comprises an atomizing base body, a heating piece and a preheating piece, the atomizing base body comprises a bottom wall, a side wall connected with the bottom wall and an oil storage cavity defined by the side wall around the bottom wall, and the oil storage cavity is used for storing tobacco tar; the bottom wall is made of a porous material, and at least part of the side wall is made of a compact material; the heating element comprises a heating and atomizing part, the heating and atomizing part is arranged on the lower surface of the bottom wall, 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 side wall or arranged on the outer surface of the side wall, and the preheating part is used for heating after being electrified so as to preheat the tobacco tar in the tar storage cavity. The atomizing core not only can preheat tobacco tar and solve the problems that high-viscosity tobacco tar is slow in guiding speed and easy to generate scorched smell, but also can reduce or avoid the phenomenon of tar leakage. 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 small 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 smoke oil (especially the smoke oil 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 smoke oil with high viscosity and poor fluidity, and it is easy to have a burnt smell. At the same time, since the porous ceramic substrate is a porous structure, the smoke oil in the porous ceramic substrate can easily penetrate into the outside of the porous ceramic substrate, causing oil leakage. Utility Model Content

[0005] The utility model aims to provide an atomizer core, which can preheat the e-liquid, improve the problem of slow oil conduction rate and easy burning smell of high-viscosity e-liquid, and can reduce or avoid the phenomenon of oil leakage.

[0006] The utility model provides an atomizer core, comprising an atomizer base, a heating element and a preheating element, wherein the atomizer base comprises a bottom wall, a side wall connected to the bottom wall and an oil storage cavity formed by the side wall surrounding the bottom wall, wherein the oil storage cavity is used to store tobacco oil; the bottom wall is made of porous material, and at least part of the side wall is made of dense material; the heating element comprises a heating atomization part, which is arranged on the lower surface of the bottom wall, and is used to generate heat after power is turned on to heat and atomize the tobacco oil; the preheating element comprises a preheating part, which is embedded in the side wall or arranged on the outer surface of the side wall, and is used to generate heat after power is turned on to preheat the tobacco oil in the oil storage cavity.

[0007] In one achievable manner, at least the upper half of the side wall is made of a dense material.

[0008] In one practicable manner, the entire side wall is made of dense material.

[0009] In one achievable manner, the side wall and the bottom wall are bonded and fixed by an adhesive layer.

[0010] In one achievable manner, the side wall includes a first part and a second part, the first part is located above the second part, and the second part is connected between the bottom wall and the first part; the first part is made of a dense material, the second part is made of a porous material, and the preheating part is embedded in the first part or arranged on the outer surface of the first part.

[0011] In one achievable manner, the first part and the second part are bonded and fixed by an adhesive layer.

[0012] In one achievable manner, the second portion and the bottom wall are an integral structure.

[0013] In one achievable manner, the height of the first portion is greater than the height of the second portion.

[0014] In one achievable manner, the porous material is a porous ceramic material, and the dense material is a dense ceramic material; or, the porous material is a porous glass material, and the dense material is a dense glass material.

[0015] In an achievable manner, the difference between the thermal conductivity of the dense material and the thermal conductivity of the porous material does not exceed 8% of the thermal conductivity of the porous material.

[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 a large-capacity oil storage chamber in the atomizer base, and the oil storage chamber is used to store the oil. The oil in the electronic atomizer is stored in the oil storage chamber, that is, the atomizer core is equivalent to a heating pot, which not only plays the role of heating and atomizing the oil, but also plays the role of long-term oil storage; at the same time, by providing a preheating part, the preheating part includes a preheating part, which can generate heat after power is turned on to preheat the oil in the oil storage chamber, so that the oil can be liquefied quickly, improve the problem of slow oil conduction rate and easy burning smell of high-viscosity oil, improve the atomization efficiency and atomization amount of the atomizer core, and meet the user's use requirements of large smoke volume. Moreover, since the heating atomization part is arranged on the bottom wall, the temperature of the bottom wall is relatively high when working, while the temperature of the side wall is relatively low, so the preheating part is arranged on the side wall to better preheat the oil in the oil storage chamber.

[0018] At the same time, since at least part of the side wall is made of dense material, and the smoke oil cannot penetrate the dense material (the dense material is a dense structure with few or no pores inside), when the smoke oil in the oil storage cavity is heated and liquefied, it can reduce or avoid the smoke oil from leaking out of the side wall, thereby reducing or avoiding the phenomenon of oil leakage in the atomizer core. Moreover, since the dense material is smoother than the porous material (that is, the surface roughness of the dense material is less than the surface roughness of the porous material), the inner surface of the side wall is smoother, thereby reducing or avoiding the smoke oil remaining on the inner surface of the side wall, thereby improving the utilization rate of the smoke oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the atomizer core in the embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the atomizer core in another direction in an embodiment of the utility model.

[0021] Figure 3 for Figure 2 Schematic diagram of the explosion structure.

[0022] Figure 4 for Figure 2 Schematic cross-section of .

[0023] Figure 5 It is a schematic structural diagram of the preheating part in the embodiment of the utility model.

[0024] Figure 6 It is a schematic diagram of the structure of the heating element in the embodiment of the utility model.

[0025] Figure 7 for Figure 6 Top view of the .

[0026] Figure 8 It is a cross-sectional schematic diagram of an atomizer core in another embodiment of the utility model. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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 atomizer base 1, a heating element 2 and a preheating element 3. The atomizer base 1 includes a bottom wall 11, a side wall 12 connected to the bottom wall 11, and an oil storage chamber 10 formed by the side wall 12 surrounding the bottom wall 11. The oil storage chamber 10 is used to store smoke oil. The smoke oil in the electronic atomizer is stored in the oil storage chamber 10 (that is, there is no need to additionally set up an oil storage bin for storing smoke oil in the electronic atomizer). The side wall 12 is formed by extending and protruding upward from the outer edge of the bottom wall 11; the bottom wall 11 is made of a porous material (the porous material has a plurality of micropores), and at least part of the side wall 12 is made of a dense material (the dense material is a dense structure, and there are few or no pores inside it). The heating element 2 includes a heating atomization part 21, which is disposed on the lower surface 111 of the bottom wall 11. The heating atomization part 21 is used to generate heat after power is turned on to heat and atomize the e-liquid. The preheating element 3 includes a preheating part 31, which is embedded in the side wall 12 or disposed on the outer surface of the side wall 12 (preferably, the preheating part 31 is embedded in the side wall 12). The preheating part 31 is used to generate heat after power is turned on to preheat the e-liquid in the oil storage chamber 10.

[0031] Specifically, the atomizer core provided in this embodiment is provided with a large-capacity oil storage chamber 10 in the atomizer base 1. The oil storage chamber 10 is used to store the oil. The oil in the electronic atomizer is stored in the oil storage chamber 10, that is, the atomizer core is equivalent to a heating pot, which not only plays the role of heating and atomizing the oil, but also plays the role of long-term oil storage; at the same time, by providing a preheating member 3, the preheating member 3 includes a preheating part 31, and the preheating part 31 can generate heat after power is turned on to preheat the oil in the oil storage chamber 10, so that the oil can be quickly liquefied, improve the problem of slow oil conduction rate and easy burning smell of high-viscosity oil, improve the atomization efficiency and atomization amount of the atomizer core, and meet the user's use requirements of large smoke volume. Moreover, since the heating atomization part 21 is arranged on the bottom wall 11, the temperature of the bottom wall 11 is relatively high when working, while the temperature of the side wall 12 is relatively low, so the preheating part 31 is arranged on the side wall 12 to better preheat the oil in the oil storage chamber 10.

[0032] At the same time, since at least part of the side wall 12 is made of dense material, and the smoke oil cannot penetrate the dense material, when the smoke oil in the oil storage chamber 10 is heated and liquefied, it can reduce or prevent the smoke oil from seeping out from the side wall 12, thereby reducing or preventing the phenomenon of oil leakage in the atomizer core. In addition, since the dense material is smoother than the porous material (that is, the surface roughness of the dense material is less than the surface roughness of the porous material), the inner surface of the side wall 12 is relatively smooth, thereby reducing or preventing the smoke oil from remaining on the inner surface of the side wall 12, thereby improving the utilization rate of the smoke oil.

[0033] like Figure 4 As shown, as an embodiment, at least the upper half of the side wall 12 is made of a dense material, thereby at least preventing the smoke oil from seeping out from the top of the side wall 12 and at least reducing or preventing the smoke oil from remaining at the top of the inner surface of the side wall 12.

[0034] like Figure 4 As shown, as an embodiment, the entire side wall 12 is made of dense material, so that the entire side wall 12 can block the smoke oil, prevent the smoke oil from seeping out of the side wall 12, and reduce or avoid the smoke oil remaining on the inner surface of the side wall 12 as much as possible.

[0035] like Figure 4 As shown, as an embodiment, the side wall 12 and the bottom wall 11 are split structures, and the side wall 12 and the bottom wall 11 are bonded and fixed by an adhesive layer 13. The adhesive layer 13 can be a high-temperature adhesive, silicone, or the like.

[0036] like Figure 8As shown, as another embodiment, the side wall 12 includes a first portion 121 and a second portion 122, the first portion 121 is located above the second portion 122, and the second portion 122 is connected between the bottom wall 11 and the first portion 121. The first portion 121 is made of a dense material, the second portion 122 is made of a porous material, and the preheating portion 31 is embedded in the first portion 121 or disposed on the outer surface of the first portion 121 (preferably, the preheating portion 31 is embedded in the first portion 121).

[0037] Specifically, since the first portion 121 is made of a dense material, the smoke oil can be prevented from leaking out of the first portion 121, and the smoke oil residue on the inner surface of the first portion 121 can be reduced or avoided. At the same time, since the second portion 122 is made of a porous material and the second portion 122 is directly connected to the bottom wall 11, the smoke oil in the oil storage chamber 10 can be directly transferred to the bottom wall 11, and can also be indirectly transferred to the bottom wall 11 through the second portion 122, thereby improving the efficiency of the smoke oil being transferred to the bottom wall 11, and thereby improving the atomization efficiency.

[0038] like Figure 8 As shown, as an embodiment, the second part 122 is an integral structure with the bottom wall 11. The first part 121 and the second part 122 are split structures, and the first part 121 and the second part 122 are bonded and fixed by an adhesive layer 13. The adhesive layer 13 can be a high-temperature adhesive, silicone, etc.

[0039] like Figure 8 As shown, as an embodiment, the height H1 of the first portion 121 is greater than the height H2 of the second portion 122, thereby making most of the side wall 12 made of dense material and a small part of it made of porous material, so that the side wall 12 can strike a balance between oil leakage prevention performance and oil transportation performance.

[0040] As an embodiment, the dense material and the porous material are of similar material, have the same thermal conductivity and heat transfer rate, thereby ensuring the temperature uniformity of each part of the atomizing substrate 1. As an embodiment, the difference between the thermal conductivity of the dense material and the thermal conductivity of the porous material does not exceed 8% of the thermal conductivity of the porous material.

[0041] As an implementation mode, the porous material is a porous ceramic material, and the dense material is a dense ceramic material; that is, the bottom wall 11 is made of a porous ceramic material, and the side wall 12 is made of a dense ceramic material. Of course, in other embodiments, the porous material may also be a porous glass material, and the dense material may also be a dense glass material.

[0042] As an implementation mode, the volume of the oil storage chamber 10 is 0.5-1.5 mL; thus, the volume of the oil storage chamber 10 is large enough to store enough e-liquid (it should be noted that some existing porous ceramic bodies are also provided with oil storage tanks, but their volumes are very small and only serve to temporarily store e-liquid, rather than to store oil for a long time).

[0043] As an embodiment, the heating power of the preheating part 31 is less than the heating power of the heating atomization part 21. Therefore, during operation, the temperature of the bottom wall 11 is relatively high (generally around 200°C), while the temperature of the side wall 12 is relatively low (generally around 80°C).

[0044] like Figures 1 to 5 As shown, as an embodiment, the atomizer base 1 is a cup-shaped structure as a whole, the side wall 12 is an annular cylindrical structure, the preheating portion 31 is similar in shape to the side wall 12, and the preheating portion 31 is an annular cylindrical structure surrounding the outer periphery of the oil storage chamber 10, so that the preheating portion 31 can circumferentially heat the tobacco oil in the oil storage chamber 10, thereby improving the preheating efficiency.

[0045] like Figures 1 to 5 As shown, as an embodiment, the bottom wall 11 is a cylindrical or truncated cone structure, the side wall 12 is a cylindrical structure surrounding the periphery of the bottom wall 11, and the preheating portion 31 is a cylindrical structure surrounding the periphery of the oil storage chamber 10. Of course, in other embodiments, the side wall 12 and the preheating portion 31 may also be other shapes, such as a square ring cylindrical structure.

[0046] like Figure 3 , Figure 4 and Figure 6 As shown, as an embodiment, the heating element 2 also includes an auxiliary preheating portion 22 connected to the heating atomization portion 21, and the auxiliary preheating portion 22 passes through the bottom wall 11 of the atomization substrate 1 and extends into the side wall 12 (that is, the top of the auxiliary preheating portion 22 is located in the side wall 12, and the bottom of the auxiliary preheating portion 22 is located in the bottom wall 11); the auxiliary preheating portion 22 is used to generate heat after power is turned on to preheat the tobacco oil in the oil storage chamber 10. By providing the auxiliary preheating portion 22, the preheating efficiency of the tobacco oil is further improved.

[0047] like Figure 4 As shown, as an embodiment, the preheating part 31 is located above the auxiliary preheating part 22, the preheating part 31 is mainly used to heat the upper half of the side wall 12, and the auxiliary preheating part 22 is mainly used to heat the lower half of the side wall 12. The auxiliary preheating part 22 and the preheating part 31 do not contact each other, that is, the auxiliary preheating part 22 and the preheating part 31 are not electrically connected to each other, that is, the heating element 2 and the preheating element 3 are not electrically connected to each other, so that the heating element 2 and the preheating element 3 can be controlled independently.

[0048] Specifically, since the bottom wall 11 is heated by the heating atomization unit 21, the temperature of the bottom wall 11 is higher. Due to the heating effect of the bottom wall 11, the tobacco oil in the lower half of the oil storage chamber 10 is more easily preheated. Therefore, only an auxiliary preheating unit 22 with a smaller heating value needs to be provided in the lower half of the side wall 12 for auxiliary heating. Since the tobacco oil in the upper half of the oil storage chamber 10 is less heated by the bottom wall 11, a preheating unit 31 with a larger heating value needs to be provided in the upper half of the side wall 12 for separate heating, so as to improve the preheating uniformity and preheating efficiency of the tobacco oil in the oil storage chamber 10.

[0049] As an implementation manner, the heating power of the auxiliary preheating part 22 is smaller than the heating power of the heating atomization part 21 .

[0050] like Figure 6 and Figure 7 As shown, as an embodiment, the heating atomization part 21 is in a disc-shaped structure as a whole, and the auxiliary preheating part 22 is in a long strip-shaped structure, and the auxiliary preheating part 22 is arranged at the outer edge of the heating atomization part 21. There are multiple auxiliary preheating parts 22, and the multiple auxiliary preheating parts 22 are arranged at intervals along the circumference of the heating atomization part 21.

[0051] like Figure 6 and Figure 7 As shown, as an embodiment, the number of the auxiliary preheating parts 22 is two, and the two auxiliary preheating parts 22 are respectively arranged on opposite sides of the heating atomization part 21 along the radial direction of the heating atomization part 21.

[0052] like Figure 4 , Figure 6 and Figure 7 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 bottom wall 11, thereby further increasing the connection strength between the heating atomization part 21 and the atomization substrate 1, 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.

[0053] As an implementation mode, the heating atomization part 21, the auxiliary preheating part 22 and the connecting rib 23 are an integrated structure.

[0054] like Figure 6 and Figure 7 As shown, as an embodiment, the heating atomization part 21 and the auxiliary preheating part 22 are formed by bending the metal line 210 in one piece, and at least part of the connecting ribs 23 are arranged at the corners of the heating atomization part 21; since the heating atomization part 21 generates more heat at the corners and is more likely to fall off, the connecting ribs 23 are arranged at the corners of the heating atomization part 21 to effectively prevent the corners from falling off. At the same time, part of the connecting ribs 23 are arranged on the first collector 26 and the second collector 27.

[0055] 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.

[0056] like Figure 2 , Figure 6 and Figure 7 As shown, as an embodiment, the heating element 2 further includes two first electrode rods 25, which are respectively connected to the two ends of the heating atomization part 21, and the two first electrode rods 25 extend downward compared to the atomization base 1. The two first electrode rods 25 are respectively used to be electrically connected to the positive and negative electrodes of the power supply.

[0057] like Figure 6 and Figure 7 As shown, as an embodiment, a first current collecting portion 26 and a second current collecting portion 27 are respectively provided at both ends of the heating atomization portion 21, and the two first electrode rods 25 are respectively connected to the first current collecting portion 26 and the second current collecting portion 27.

[0058] 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 one end of the two second electrode rods 32 is located inside the side wall 12 of the atomizing substrate 1, and the other end extends downward to the outside of the side wall 12 of the atomizing substrate 1. The two second electrode rods 32 are respectively used to be electrically connected to the positive and negative electrodes of the power supply.

[0059] like Figure 5 As shown, as an embodiment, along the radial direction of the preheating part 31, the third collecting part 33 and the fourth collecting part 34 are respectively provided at both ends of the preheating part 31, and the two second electrode rods 32 are respectively connected to the third collecting part 33 and the fourth collecting part 34.

[0060] like Figure 1 As shown, as an embodiment, the top of the atomizer base 1 is provided with an opening 100 connected to the oil storage chamber 10; the atomizer core also includes a sealing cover (not shown), which is arranged at the opening 100 and seals the opening 100. Specifically, the oil storage chamber 10 can be filled with tobacco oil through the opening 100, and after the tobacco oil is filled, the opening 100 is sealed by the sealing cover to prevent oil leakage. The sealing cover can be, for example, a silicone cover.

[0061] As an embodiment, the components of the bottom wall 11 (porous ceramic material) include, by weight percentage, 30%-70% of a first skeleton material, 5%-30% of a first thermally conductive filler and 15%-55% of a first adhesive, wherein the first skeleton material is one or more of spodumene, kaolin, dolomite, wollastonite, bentonite, feldspar powder, quartz powder, talc, wollastonite, calcite and mullite, the first thermally conductive filler is one or more of zirconium oxide, zinc oxide, barium carbonate, silicon carbide, aluminum nitride and aluminum oxide, and the first adhesive is one or more of clay, glass powder and gypsum powder.

[0062] As an embodiment, the bottom wall 11 is formed by dewaxing and sintering a first ceramic green body. In terms of weight percentage, the first ceramic green body comprises 20%-60% of a first skeleton material, 1%-25% of a first thermal conductive filler, 10%-50% of a first adhesive, 20%-50% of a pore former (the pore former is one or more of PMMA, PS balls, starch, lignin, graphite and carbon powder), 10%-20% of paraffin wax and 2%-10% of stearic acid.

[0063] As an embodiment, the side wall 12 (dense ceramic material) is formed by dewaxing and sintering the second ceramic green body. In terms of weight percentage, the components of the second ceramic green body include 20%-60% of the second skeleton material, 1%-25% of the second thermal conductive filler, 10%-50% of the second adhesive, 10%-20% of paraffin wax and 2%-10% of stearic acid. Among them, the second skeleton material is one or more of spodumene, kaolin, dolomite, wollastonite, bentonite, feldspar powder, quartz powder, talc, wollastonite, calcite and mullite, the second thermal conductive filler is one or more of zirconium oxide, zinc oxide, barium carbonate, silicon carbide, aluminum nitride and aluminum oxide, and the second adhesive is one or more of clay, glass powder and gypsum powder.

[0064] As an embodiment, the preparation method of the atomizer core is:

[0065] S10: preparing the bottom wall 11 and the side wall 12 respectively, and compounding the heating element 2 with the bottom wall 11, and compounding the preheating element 3 with the side wall 12; wherein the bottom wall 11 is made of a porous ceramic material, and the side wall 12 is made of a dense ceramic material;

[0066] S20: The side wall 12 and the bottom wall 11 are bonded and fixed by the adhesive layer 13 to obtain the atomizer core.

[0067] As an embodiment, in the above step S10, the method for preparing the bottom wall 11 comprises the following steps:

[0068] Step 1: Mix and ball-mill a certain amount of a first framework material, a first thermally conductive filler, a first adhesive and a pore-forming agent (specifically, the first framework material, the first thermally conductive filler, the first adhesive and the pore-forming agent can be placed in the same container, and then zirconium balls are added for mixed ball-milling) to obtain a first mixed powder; the mixed ball-milling time can be 1-8 hours, preferably 2-4 hours;

[0069] Step 2: Mix the first mixed powder with a certain amount of paraffin wax and stearic acid to obtain a first ceramic slurry; the mixing and stirring temperature is 60° C.-120° C., and the mixing and stirring time is 2-8 hours;

[0070] Step 3: pre-place the heating element 2 in a grouting machine, then inject the first ceramic slurry into the grouting machine, and obtain a first ceramic green body by hot die casting (specifically, pre-place the heating element 2 in a grouting machine, then inject the first ceramic slurry into the grouting machine; set the insulation temperature of the grouting machine to 55°C-80°C, stir and degas for 30-60 minutes; hot die cast the first ceramic slurry under a preset pressure, wherein the preset pressure range may specifically be 0.3-0.8Mpa);

[0071] Step 4: Dewaxing and sintering the first ceramic green body at a preset temperature to obtain the bottom wall 11. Specifically, the wax is removed by siphoning, the wax removal temperature is 180°C-280°C, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200°C-250°C, and the wax removal time is 2-4 hours. The sintering temperature is 500°C-800°C, and the sintering time is 2-8 hours; preferably, the sintering temperature is 600°C-750°C, and the sintering time is 3-5 hours.

[0072] As an embodiment, in the above step S10, the method for preparing the side wall 12 includes the following steps:

[0073] Step 1: Mix and ball-mill a certain amount of the second framework material, the second thermally conductive filler and the second adhesive (specifically, the second framework material, the second thermally conductive filler and the second adhesive can be placed in the same container, and then zirconium balls are added for mixed ball-milling) to obtain a second mixed powder; the mixing ball-milling time can be 1-8 hours, preferably 2-4 hours;

[0074] Step 2: Mix the second mixed powder with a certain amount of paraffin wax and stearic acid to obtain a second ceramic slurry; the mixing and stirring temperature is 60° C.-120° C., and the mixing and stirring time is 2-8 hours;

[0075] Step 3: pre-placing the preheating part 3 in a grouting machine, then injecting the second ceramic slurry into the grouting machine, and obtaining a second ceramic green body by hot die casting (specifically, pre-placing the preheating part 3 in a grouting machine, then injecting the second ceramic slurry into the grouting machine; setting the insulation temperature of the grouting machine to 55°C-80°C, stirring and degassing for 30-60 minutes; hot die casting the second ceramic slurry under a preset pressure, wherein the preset pressure range may specifically be 0.3-0.8Mpa);

[0076] Step 4: Dewaxing and sintering the second ceramic green body at a preset temperature to obtain the side wall 12. Specifically, the dewaxing is performed by siphoning, the dewaxing temperature is 180°C-280°C, and the dewaxing time is 1-6 hours; preferably, the dewaxing temperature is 200°C-250°C, and the dewaxing time is 2-4 hours. The sintering temperature is 1100°C-1300°C, and the sintering time is 1-3 hours.

[0077] As an implementation method, the heating control method of the atomizer core is:

[0078] 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 heat the atomization base 1 at the same time, so as to preheat the tobacco oil in the oil storage chamber 10;

[0079] 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 e-liquid in the oil storage chamber 10. Such a setting can not only save electric energy, but also control the preheating efficiency of the e-liquid, and ensure the balance of supply and demand of the atomizer core.

[0080] This embodiment also 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 10 of the atomizer core (that is, no additional oil storage bin for storing tobacco oil is required in the electronic atomizer).

[0081] The atomizer core provided in this embodiment is provided with a large-capacity oil storage chamber 10 in the atomizer base 1. The oil storage chamber 10 is used to store the oil. The oil in the electronic atomizer is stored in the oil storage chamber 10, that is, the atomizer core is equivalent to a heating pot, which not only plays the role of heating and atomizing the oil, but also plays the role of long-term oil storage. At the same time, by providing a preheating member 3, the preheating member 3 includes a preheating part 31, and the preheating part 31 can generate heat after power is turned on to preheat the oil in the oil storage chamber 10, so that the oil can be quickly liquefied, improve the problem of slow oil conduction rate and easy burning smell of high-viscosity oil, improve the atomization efficiency and atomization amount of the atomizer core, and meet the user's use requirements of large smoke volume. Moreover, since the heating atomization part 21 is arranged on the bottom wall 11, the temperature of the bottom wall 11 is relatively high when working, while the temperature of the side wall 12 is relatively low, so the preheating part 31 is arranged on the side wall 12 to better preheat the oil in the oil storage chamber 10.

[0082] At the same time, since at least part of the side wall 12 is made of dense ceramic material, and the smoke oil cannot penetrate the dense ceramic material, when the smoke oil in the oil storage chamber 10 is heated and liquefied, it can reduce or prevent the smoke oil from seeping out from the side wall 12, thereby reducing or preventing the phenomenon of oil leakage from the atomizer core. Moreover, since the dense ceramic material is smoother than the porous ceramic material, the inner surface of the side wall 12 is relatively smooth, thereby reducing or preventing the smoke oil from remaining on the inner surface of the side wall 12, thereby improving the utilization rate of the smoke oil.

[0083] Example 1

[0084] An atomizer core, the preparation steps of which include:

[0085] (1) Preparing the bottom wall of the atomizing substrate, wherein the bottom wall is made of a porous ceramic material; the specific preparation steps are as follows:

[0086] Step 1: Place 35% by weight of a first skeleton material, 30% by weight of a first adhesive, 5% by weight of a first thermal conductive filler and 30% by weight of a pore-forming agent in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0087] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0088] Step 3: Place the heating element in the grouting machine in advance, and then inject the stirred slurry into the grouting machine to obtain a ceramic body. 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;

[0089] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the bottom wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180℃-280℃, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200℃-250℃, and the wax removal time is 2-4 hours. The sintering temperature is 500℃-800℃, and the sintering time is 2-8 hours; preferably, the sintering temperature is 600℃-750℃, and the sintering time is 3-5 hours.

[0090] (2) preparing the side wall of the atomizing substrate, wherein the side wall is made of a dense ceramic material; the specific preparation steps are as follows:

[0091] Step 1: Place 50% by weight of the second skeleton material, 43% by weight of the second adhesive and 7% by weight of the second thermal conductive filler in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0092] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0093] Step 3: Place the preheated part in the grouting machine, and then inject the stirred slurry into the grouting machine to obtain the ceramic body. 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-press the slurry under a preset pressure, wherein the preset pressure is specifically 0.3-0.8Mpa;

[0094] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the side wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180°C-280°C, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200°C-250°C, and the wax removal time is 2-4 hours. The sintering temperature is 1100°C, and the sintering time is 2 hours.

[0095] (3) The side wall and the bottom wall are fixed by bonding with the adhesive layer to obtain the atomizing core.

[0096] Example 2

[0097] An atomizer core, the preparation steps of which include:

[0098] (1) Preparing the bottom wall of the atomizing substrate, wherein the bottom wall is made of a porous ceramic material; the specific preparation steps are as follows:

[0099] Step 1: Place 35% by weight of a first skeleton material, 30% by weight of a first adhesive, 5% by weight of a first thermal conductive filler and 30% by weight of a pore-forming agent in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0100] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0101] Step 3: Place the heating element in the grouting machine in advance, and then inject the stirred slurry into the grouting machine to obtain a ceramic body. 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;

[0102] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the bottom wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180℃-280℃, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200℃-250℃, and the wax removal time is 2-4 hours. The sintering temperature is 500℃-800℃, and the sintering time is 2-8 hours; preferably, the sintering temperature is 600℃-750℃, and the sintering time is 3-5 hours.

[0103] (2) preparing the side wall of the atomizing substrate, wherein the side wall is made of a dense ceramic material; the specific preparation steps are as follows:

[0104] Step 1: Place 50% by weight of the second skeleton material, 43% by weight of the second adhesive and 7% by weight of the second thermal conductive filler in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0105] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0106] Step 3: Place the preheated part in the grouting machine, and then inject the stirred slurry into the grouting machine to obtain the ceramic body. 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-press the slurry under a preset pressure, wherein the preset pressure is specifically 0.3-0.8Mpa;

[0107] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the side wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180°C-280°C, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200°C-250°C, and the wax removal time is 2-4 hours. The sintering temperature is 1200°C, and the sintering time is 2 hours.

[0108] (3) The side wall and the bottom wall are fixed by bonding with the adhesive layer to obtain the atomizing core.

[0109] Example 3

[0110] An atomizer core, the preparation steps of which include:

[0111] (1) Preparing the bottom wall of the atomizing substrate, wherein the bottom wall is made of a porous ceramic material; the specific preparation steps are as follows:

[0112] Step 1: Place 35% by weight of a first skeleton material, 30% by weight of a first adhesive, 5% by weight of a first thermal conductive filler and 30% by weight of a pore-forming agent in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0113] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0114] Step 3: Place the heating element in the grouting machine in advance, and then inject the stirred slurry into the grouting machine to obtain a ceramic body. 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;

[0115] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the bottom wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180℃-280℃, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200℃-250℃, and the wax removal time is 2-4 hours. The sintering temperature is 500℃-800℃, and the sintering time is 2-8 hours; preferably, the sintering temperature is 600℃-750℃, and the sintering time is 3-5 hours.

[0116] (2) preparing the side wall of the atomizing substrate, wherein the side wall is made of a dense ceramic material; the specific preparation steps are as follows:

[0117] Step 1: Place 50% by weight of the second skeleton material, 43% by weight of the second adhesive and 7% by weight of the second thermal conductive filler in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0118] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0119] Step 3: Place the preheated part in the grouting machine, and then inject the stirred slurry into the grouting machine to obtain the ceramic body. 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-press the slurry under a preset pressure, wherein the preset pressure is specifically 0.3-0.8Mpa;

[0120] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the side wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180°C-280°C, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200°C-250°C, and the wax removal time is 2-4 hours. The sintering temperature is 1300°C, and the sintering time is 2 hours.

[0121] (3) The side wall and the bottom wall are fixed by bonding with the adhesive layer to obtain the atomizing core.

[0122] Example 4

[0123] An atomizer core, the preparation steps of which include:

[0124] (1) Preparing the bottom wall of the atomizing substrate, wherein the bottom wall is made of a porous ceramic material; the specific preparation steps are as follows:

[0125] Step 1: Place 35% by weight of a first skeleton material, 30% by weight of a first adhesive, 5% by weight of a first thermal conductive filler and 30% by weight of a pore-forming agent in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0126] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0127] Step 3: Place the heating element in the grouting machine in advance, and then inject the stirred slurry into the grouting machine to obtain a ceramic body. 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;

[0128] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the bottom wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180℃-280℃, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200℃-250℃, and the wax removal time is 2-4 hours. The sintering temperature is 500℃-800℃, and the sintering time is 2-8 hours; preferably, the sintering temperature is 600℃-750℃, and the sintering time is 3-5 hours.

[0129] (2) preparing the side wall of the atomizing substrate, wherein the side wall is made of a dense ceramic material; the specific preparation steps are as follows:

[0130] Step 1: Place 45% by weight of the second skeleton material, 40% by weight of the second adhesive and 15% by weight of the second thermal conductive filler in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0131] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0132] Step 3: Place the preheated part in the grouting machine, and then inject the stirred slurry into the grouting machine to obtain the ceramic body. 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-press the slurry under a preset pressure, wherein the preset pressure is specifically 0.3-0.8Mpa;

[0133] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the side wall after cooling. The wax is removed by siphoning, the wax removal temperature is 180°C-280°C, and the wax removal time is 1-6 hours; preferably, the wax removal temperature is 200°C-250°C, and the wax removal time is 2-4 hours. The sintering temperature is 1300°C, and the sintering time is 2 hours.

[0134] (3) The side wall and the bottom wall are fixed by bonding with the adhesive layer to obtain the atomizing core.

[0135] Comparative Example 1

[0136] An atomizing core, the bottom wall and the side wall of which are both made of porous ceramic materials, and the preparation steps thereof include:

[0137] Step 1: Place 35% by weight of a first skeleton material, 30% by weight of a first adhesive, 5% by weight of a first thermal conductive filler and 30% by weight of a pore-forming agent in the same container; then add zirconium balls 2.5 times the total weight of the powder for mixed ball milling; wherein the mixed ball milling time can be 1-8 hours, preferably 2-4 hours.

[0138] Step 2: 70% by weight of the powder in step 1, 25% by weight of paraffin wax and 5% by weight of stearic acid are placed in a blender container and stirred at 60° C.-120° C. for 2-8 hours.

[0139] Step 3: Place the heating element and the preheating element in the grouting machine in advance, and then inject the stirred slurry into the grouting machine to obtain a ceramic body. 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-press the slurry under a preset pressure, wherein the preset pressure is specifically 0.3-0.8Mpa;

[0140] Step 4: Dewax and sinter the ceramic body at a preset temperature, and obtain the atomizer core after cooling. The wax is discharged by siphoning, the wax discharge temperature is 180℃-280℃, and the wax discharge time is 1-6 hours; preferably, the wax discharge temperature is 200℃-250℃, and the wax discharge time is 2-4 hours. The sintering temperature is 500℃-800℃, and the sintering time is 2-8 hours; preferably, the sintering temperature is 600℃-750℃, and the sintering time is 3-5 hours.

[0141] The atomizer cores prepared in the above-mentioned Examples 1-4 and Comparative Example 1 were tested respectively, and the test results are shown in the following table:

[0142]

[0143] It can be seen from the above table that the atomizer cores of Examples 1-4 and Comparative Example 1 all have good preheating effects on the e-liquid. The atomizer cores in Examples 1-4 all have good anti-leakage performance, but the atomizer core of Comparative Example 1 has oil leakage, and its anti-leakage performance is poor.

[0144] 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 atomizing base (1), a heating element (2) and a preheating element (3); the atomizing base (1) comprises a bottom wall (11), a side wall (12) connected to the bottom wall (11), and an oil storage cavity (10) formed by the side wall (12) surrounding the bottom wall (11); the oil storage cavity (10) is used to store tobacco oil; the bottom wall (11) is made of a porous material, and at least a part of the side wall (12) is made of a dense material; the heating element (2) comprises a heating atomizing portion (21), the heating atomization section (21) is arranged on the lower surface (111) of the bottom wall (11), and the heating atomization section (21) is used to generate heat after power is turned on to heat and atomize the tobacco oil; the preheating element (3) includes a preheating section (31), and the preheating section (31) is embedded in the side wall (12) or arranged on the outer surface of the side wall (12), and the preheating section (31) is used to generate heat after power is turned on to preheat the tobacco oil in the oil storage chamber (10).

2. The atomizer core according to claim 1, characterized in that: At least the upper half of the side wall (12) is made of dense material.

3. The atomizer core according to claim 1, characterized in that: The entire side wall (12) is made of dense material.

4. The atomizer core according to claim 3, characterized in that: The side wall (12) and the bottom wall (11) are bonded and fixed via an adhesive layer (13).

5. The atomizer core according to claim 1, characterized in that: The side wall (12) comprises a first part (121) and a second part (122); the first part (121) is located above the second part (122), and the second part (122) is connected between the bottom wall (11) and the first part (121); the first part (121) is made of a dense material, and the second part (122) is made of a porous material; the preheating part (31) is embedded in the first part (121) or arranged on the outer surface of the first part (121).

6. The atomizer core according to claim 5, characterized in that: The first part (121) and the second part (122) are bonded and fixed via an adhesive layer (13).

7. The atomizer core according to claim 5, characterized in that: The height of the first portion (121) is greater than the height of the second portion (122).

8. The atomizer core according to any one of claims 1 to 7, characterized in that: The porous material is a porous ceramic material, and the dense material is a dense ceramic material; or, the porous material is a porous glass material, and the dense material is a dense glass material.

9. The atomizer core according to any one of claims 1 to 7, characterized in that: The difference between the thermal conductivity of the dense material and the thermal conductivity of the porous material does not exceed 8% of the thermal conductivity of the porous material.

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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