CN219537490U - Porous ceramic atomizing core and electronic cigarette atomizer - Google Patents

Abstract

The utility model provides a porous ceramic atomizing core, which comprises a porous ceramic body with a columnar structure, a conductive heating piece and a sleeve, wherein the porous ceramic body is provided with a main air hole and at least one auxiliary air hole, and the main air hole and the auxiliary air hole penetrate through the porous ceramic body along the axial direction of the porous ceramic body; the main air hole is arranged at the center of the porous ceramic body, and the conductive heating element is arranged on the inner wall of the main air hole; the auxiliary air holes are arranged around the outer side of the main air hole, the auxiliary air holes are arranged close to the conductive heating piece, and the aperture of the auxiliary air holes is smaller than that of the main air hole; the sleeve is sleeved outside the porous ceramic body, an oil inlet hole is arranged on the sleeve at a position corresponding to the porous ceramic body, and the porous ceramic body and the sleeve are fixed together through sintering. The porous ceramic atomizing core provided by the utility model has high atomizing efficiency and better oil guiding and storing capacity. The utility model further provides the electronic cigarette atomizer.

Description

Porous ceramic atomizing core and electronic cigarette atomizer

Technical Field

The utility model relates to the technical field of electronic cigarettes, in particular to a porous ceramic atomizing core and an electronic cigarette atomizer.

Background

The electronic cigarette is also called virtual cigarette, steam cigarette, aerosol generating device, etc. and is mainly used for simulating smoking feeling on the premise of not affecting health so as to be used for stopping smoking or replacing cigarettes. As one of the core components of the electronic cigarette, the ceramic atomization core has the advantages of high lipophilicity, uniform heating, high use temperature and the like compared with the traditional cotton core or glass fiber ropes.

The current ceramic atomizing core generally comprises a porous ceramic matrix and a heating matrix arranged on the porous ceramic matrix. Because the existing ceramic atomizing core basically has only one atomizing surface (namely the surface of the porous ceramic matrix, which is contacted with the heating matrix), and the atomizing contact area of the porous ceramic matrix and the heating matrix is limited, the effect of large smoke amount is difficult to achieve even if the heating power of the heating matrix is increased, so that the existing ceramic atomizing core has the problems of low atomizing efficiency and average atomizing amount (TPM, total Particle Measure, namely the smoke amount generated by each suction) and cannot meet the use requirement of large smoke amount of users. Meanwhile, the oil guiding and storing capacities of the porous ceramic matrix also influence the atomizing efficiency of the ceramic atomizing core, and the stronger the oil guiding and storing capacities of the porous ceramic matrix are, the higher the atomizing efficiency is, so that the oil guiding and storing capacities of the porous ceramic matrix are improved, and the atomizing efficiency of the ceramic atomizing core is correspondingly improved.

Meanwhile, when the cylindrical ceramic atomizing core is assembled with atomizing equipment, one or more layers of soft materials such as non-woven fabrics, cotton strips and the like need to be coated on the periphery of the ceramic atomizing core, and then the ceramic atomizing core is filled into a metal sleeve to prepare the complete ceramic atomizing core. The process for coating the soft material on the periphery of the ceramic atomizing core is complex, the problems of dry combustion, oil leakage and the like are difficult to coat, and meanwhile, the coating process cannot be automatically produced and needs a large amount of manpower to finish, so that the production efficiency is reduced, and the production cost is increased. In addition, the metal sleeve is generally made of stainless steel, the stainless steel has low heat conductivity and low heat conduction, and the preheating effect on tobacco tar with high viscosity is poor, so that the problems of insufficient oil supply and the like can be caused.

Disclosure of Invention

The utility model aims to provide a porous ceramic atomizing core which is high in atomizing efficiency and better in oil guiding and storing capacity.

The utility model provides a porous ceramic atomizing core, which comprises a porous ceramic body with a columnar structure, a conductive heating piece and a sleeve, wherein the porous ceramic body is provided with a main air hole and at least one auxiliary air hole, and the main air hole and the auxiliary air hole penetrate through the porous ceramic body along the axial direction of the porous ceramic body; the main air hole is arranged at the center of the porous ceramic body, and the conductive heating element is arranged on the inner wall of the main air hole; the auxiliary air holes are arranged around the outer side of the main air hole, the auxiliary air holes are arranged close to the conductive heating piece, and the aperture of the auxiliary air holes is smaller than that of the main air hole; the sleeve is sleeved outside the porous ceramic body, an oil inlet hole is formed in the position, corresponding to the porous ceramic body, of the sleeve, and the porous ceramic body and the sleeve are fixed together through sintering.

In one implementation, the porous ceramic body has opposing inner and outer side walls, and the auxiliary pores are located between the inner and outer side walls of the porous ceramic body.

In one implementation, the pore size of the auxiliary pores is much smaller than the pore size of the main pores, and the pore size of the auxiliary pores is less than or equal to 1/5 of the pore size of the main pores.

In one possible mode, the pore diameter of the auxiliary pores is 0.1-0.3mm.

In one implementation, the distance between the center of the auxiliary air hole and the conductive heating element along the radial direction of the porous ceramic body is 0.2-0.5mm.

In one implementation manner, the number of the auxiliary air holes is a plurality, and the plurality of the auxiliary air holes are arranged at intervals along the circumferential direction of the porous ceramic body around the main air holes as the center.

In one implementation manner, the auxiliary air holes are uniformly distributed around the main air hole at equal intervals along the circumferential direction of the porous ceramic body.

In one implementation, the conductive heating element is a mesh structure, and the conductive heating element is bent to form a cylindrical structure.

In one possible implementation, the sleeve is a ceramic tube having a thermal conductivity of 50-150W/(m·k).

The utility model also provides an electronic cigarette atomizer which comprises the porous ceramic atomizing core and an atomizer shell, wherein the porous ceramic atomizing core is arranged in the atomizer shell.

According to the porous ceramic atomization core provided by the utility model, the auxiliary air holes are formed in the porous ceramic body, and the pore diameter of the auxiliary air holes is smaller than that of the main air holes, namely, the auxiliary air holes have smaller pore diameters, so that the auxiliary air holes have certain capillary force, and tobacco tar can be adsorbed and stored in the auxiliary air holes, so that the oil guiding and storing capacities of the porous ceramic body are improved; and this auxiliary air hole is close to conductive heating element setting, and when conductive heating element heating, the tobacco tar of storing in the auxiliary air hole and the tobacco tar of other positions that are close to conductive heating element positions in the porous ceramic body can supply to the atomizing face in time and atomize to atomization efficiency has been improved.

Meanwhile, the additionally arranged auxiliary air holes can also increase the area of the atomization surface of the porous ceramic body, and the effect of multi-surface atomization is achieved by utilizing the cooperation of the main air holes and the auxiliary air holes, so that the atomization efficiency and the atomization amount of the porous ceramic atomization core are increased under the condition that the volume of the porous ceramic body and the power of the conductive heating piece are not increased, and the use requirement of a large amount of smoke of a user is met. In addition, the additionally arranged auxiliary air holes can also be used as auxiliary air passages, so that the problem of unsmooth suction caused by the fact that the main air holes are blocked by tobacco tar and other special conditions is avoided.

Meanwhile, as the porous ceramic body and the sleeve are fixed together through sintering, the process is simple, and the step of coating the non-woven fabric outside the porous ceramic body is omitted, so that the production efficiency is improved, and the production cost is reduced; meanwhile, the porous ceramic body is in direct contact with the sleeve, so that heat on the porous ceramic body can be quickly conducted to the sleeve to preheat tobacco tar, and further the oil supply speed is improved.

Drawings

FIG. 1 is a schematic structural view of a porous ceramic atomizing core according to an embodiment of the present utility model.

Fig. 2 is a schematic view of the structure of fig. 1 with the sleeve removed.

Fig. 3 is a bottom view of fig. 2.

Fig. 4 is a schematic structural diagram of the conductive heat generating element in fig. 2.

Fig. 5 is a schematic cross-sectional view of an electronic cigarette atomizer according to an embodiment of the present utility model.

Fig. 6 is a schematic structural view of a porous ceramic atomizing core according to another embodiment of the present utility model.

Fig. 7 is a schematic cross-sectional view of an electronic cigarette atomizer according to another embodiment of the present utility model.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms upper, lower, left, right, front, rear, top, bottom and the like (if any) in the description and in the claims are used for descriptive purposes and not necessarily for describing relative positions of structures in the figures and in describing relative positions of structures. It should be understood that the use of directional terms should not be construed to limit the scope of the utility model as claimed.

As shown in fig. 1 to 4, the porous ceramic atomizing core provided by the embodiment of the utility model comprises a porous ceramic body 1 with a columnar structure, a conductive heating element 2 and a sleeve 3, wherein a main air hole 11 and at least one auxiliary air hole 12 are arranged on the porous ceramic body 1, and the main air hole 11 and the auxiliary air hole 12 penetrate through the porous ceramic body 1 along the axial direction of the porous ceramic body 1. The main air hole 11 is arranged at the center of the porous ceramic body 1, and the conductive heating element 2 is arranged on the inner wall of the main air hole 11; the auxiliary air hole 12 is arranged around the outer side of the main air hole 11, and the auxiliary air hole 12 is arranged close to the conductive heating element 2, and the aperture of the auxiliary air hole 12 is smaller than that of the main air hole 11. The sleeve 3 is sleeved outside the porous ceramic body 1, the sleeve 3 is provided with an oil inlet hole 31 at a position corresponding to the porous ceramic body 1, and the porous ceramic body 1 and the sleeve 3 are fixed together through sintering.

Specifically, the sleeve 3 not only can increase the structural strength of the porous ceramic body 1 and avoid the porous ceramic body 1 from being damaged by pressure loss, but also is convenient for the subsequent assembly between the porous ceramic atomizing core and the atomizer; meanwhile, the sleeve 3 can also play a role in heat conduction, and heat on the porous ceramic body 1 can be transmitted to tobacco tar through the sleeve 3 when the porous ceramic body is used, so that a preheating effect (viscosity of the tobacco tar can be reduced after preheating) is achieved on the tobacco tar, and the tobacco tar is conveniently supplied to the porous ceramic body 1.

Specifically, in the porous ceramic atomization core provided in this embodiment, by arranging the auxiliary air holes 12 on the porous ceramic body 1, and the aperture of the auxiliary air holes 12 is smaller than that of the main air holes 11, that is, the auxiliary air holes 12 have smaller apertures, so that the auxiliary air holes 12 have a certain capillary force, and tobacco tar can be adsorbed and stored in the auxiliary air holes 12, thereby increasing the oil guiding and storing capabilities of the porous ceramic body 1; and this auxiliary air hole 12 is close to conductive heating element 2 sets up, and when conductive heating element 2 heats, the tobacco tar that stores in the auxiliary air hole 12 and the tobacco tar of other positions that are close to conductive heating element 2 in the porous ceramic body 1 can supply to the atomizing face in time and atomize to atomization efficiency has been improved.

Meanwhile, the additionally arranged auxiliary air holes 12 can also increase the area of the atomization surface of the porous ceramic body 1, the effect of multi-surface atomization is achieved by utilizing the cooperation of the main air holes 11 and the auxiliary air holes 12 (namely, the inner wall of the main air holes 11 is the main atomization surface, the inner wall of the auxiliary air holes 12 is the auxiliary atomization surface, and the smoke and oil can be generated after being atomized at the inner wall positions of the main air holes 11 and the inner wall positions of the auxiliary air holes 12 as the main air holes 11 and the auxiliary air holes 12 are of a penetrating structure, and the generated smoke and oil are discharged through the main air holes 11 and the auxiliary air holes 12 respectively for being sucked by a user), so that the atomization efficiency and the atomization amount of the porous ceramic atomization core are increased under the condition of not increasing the volume of the porous ceramic body 1 and the power of the conductive heating element 2, and the use requirement of a large amount of smoke and oil of a user is met. The additional auxiliary air hole 12 can also be used as an auxiliary air passage, so that the problem of unsmooth suction caused by the special conditions of the main air hole 11 blocked by tobacco tar and the like is avoided.

Meanwhile, as the porous ceramic body 1 and the sleeve 3 are fixed together through sintering, the process is simple, and the step of coating the non-woven fabric outside the porous ceramic body 1 is omitted, so that the production efficiency is improved, and the production cost is reduced; meanwhile, as the porous ceramic body 1 is in direct contact with the sleeve 3, heat on the porous ceramic body 1 can be quickly conducted to the sleeve 3 so as to preheat tobacco tar, and further improve the oil supply speed. In the process of manufacturing, the porous ceramic slurry can be directly molded into the sleeve 3 through a mold, and then sintered and solidified, so that the porous ceramic body 1 and the sleeve 3 are connected together.

As shown in fig. 2 and 3, as an embodiment, the porous ceramic body 1 has a cylindrical structure, and the main air holes 11 and the auxiliary air holes 12 are cylindrical holes, so that the heating uniformity of each part of the porous ceramic body 1 is improved, and the atomization efficiency is further improved. Of course, in other embodiments, the porous ceramic body 1 may have other shapes, such as a quadrangular prism or a polygonal prism.

As shown in fig. 2 and 3, as an embodiment, the porous ceramic body 1 has opposite inner side walls 10A (i.e., inner walls of the main pores 11) and outer side walls 10B, and the auxiliary pores 12 are located between the inner side walls 10A and the outer side walls 10B of the porous ceramic body 1.

As shown in fig. 2 and 3, as an embodiment, the number of the auxiliary air holes 12 is plural, the plural auxiliary air holes 12 are arranged at intervals in the circumferential direction of the porous ceramic body 1 around the main air hole 11 as the center, and the shapes and sizes of the respective auxiliary air holes 12 are uniform. By providing a plurality of auxiliary air holes 12, the oil guiding and storing capacity and the atomization efficiency of the porous ceramic atomization core are further increased.

As shown in fig. 2 and 3, as an embodiment, a plurality of auxiliary pores 12 are uniformly distributed around the main pores 11 at equal intervals in the circumferential direction of the porous ceramic body 1.

As shown in fig. 2 and 3, as an embodiment, the number of the auxiliary air holes 12 is 5 to 8 (the number of the auxiliary air holes 12 is 7 in the drawing), the 5 to 8 auxiliary air holes 12 are uniformly distributed around the main air hole 11 at equal intervals, and the shapes and the sizes of the 5 to 8 auxiliary air holes 12 are uniform.

As shown in fig. 2 and 3, as an embodiment, the pore diameter of the auxiliary pore 12 is much smaller than the pore diameter of the main pore 11, and the pore diameter of the auxiliary pore 12 is smaller than or equal to 1/5 of the pore diameter of the main pore 11.

As one embodiment, if the pore diameter of the main pore 11 is 2mm, the pore diameter of the auxiliary pore 12 is 0.4mm or less.

As one embodiment, the pore size of the auxiliary pores 12 is 0.1 to 0.3mm. In this range, the auxiliary air hole 12 has a certain capillary force and oil storage capacity, and the auxiliary air hole 12 has good atomization and air guide capacity (the auxiliary air hole 12 has small aperture, so that the oil storage capacity is small, the atomization and air guide capacity is weak, and the auxiliary air hole 12 has too large aperture, so that the capillary force is insufficient, and oil leakage is easy).

As shown in fig. 3, as an embodiment, the distance L between the center of the auxiliary air hole 12 and the conductive heat generating member 2 (i.e., the distance between the center of the auxiliary air hole 12 and the inner wall of the main air hole 11) is 0.2 to 0.5mm in the radial direction of the porous ceramic body 1. In this range, the auxiliary air hole 12 is close to the conductive heating element 2, so that the tobacco tar stored in the auxiliary air hole 12 can be timely supplied to the contact surface of the conductive heating element 2 and the porous ceramic body 1, and a certain distance is kept between the auxiliary air hole 12 and the conductive heating element 2, so that the tobacco tar stored in the auxiliary air hole 12 is prevented from being excessively supplied fast and submerging the conductive heating element 2, and the heating temperature and atomization efficiency of the tobacco tar are affected.

As shown in fig. 2 and 4, as an embodiment, the conductive heating element 2 is a mesh structure, and the conductive heating element 2 is bent to form a cylindrical structure, which has a larger contact area with the inner wall of the main air hole 11, thereby increasing the atomization area and improving the heating uniformity. Further, because of the porous structure of the conductive heat generating member 2 (the conductive heat generating member 2 has a plurality of mesh openings), the conductive heat generating member 2 does not affect the transmission of the tobacco tar of the porous ceramic body 1, and thus does not affect the atomization efficiency. Of course, in other embodiments, the conductive heating element 2 may have other structures (e.g., a spiral heating wire).

As shown in fig. 2 and 4, as an embodiment, the porous ceramic atomizing core further includes two electrode leads 20, the two electrode leads 20 are respectively connected to opposite ends of the conductive heating element 2, the electrode leads 20 extend downward out of the main air holes 11 of the porous ceramic body 1, and the two electrode leads 20 are respectively electrically connected to the positive and negative electrodes of a power supply (not shown). The electrode lead 20 and the conductive heat generating member 2 may be connected by welding.

As an embodiment, the conductive heat generating member 2 may be made of a stainless steel material, for example, 316 stainless steel, 316L stainless steel, 304 stainless steel, 317L stainless steel, 321 stainless steel, 430 stainless steel, 904L stainless steel, or the like. Of course, in other embodiments, the conductive heat generating element 2 may be made of other materials.

As an embodiment, the sleeve 3 is a ceramic tube with high thermal conductivity, and the thermal conductivity of the ceramic tube is 50-150W/(m·k). Because the smoke oil has higher heat conductivity coefficient (the heat conductivity coefficient of stainless steel is generally about 16.2W/(m.K)), the smoke oil can still have good preheating effect when the smoke oil with higher atomization viscosity, thereby avoiding the problems of dry burning, burnt smell and the like caused by insufficient oil supply.

As shown in fig. 1, as an embodiment, the sleeve 3 is provided with a plurality of oil inlet holes 31, and the plurality of oil inlet holes 31 are uniformly distributed along the circumferential direction of the sleeve 3 at equal intervals, so that oil can be uniformly supplied to the porous ceramic body 1, and atomization uniformity is improved.

The embodiment of the utility model also provides a manufacturing method of the porous ceramic atomizing core, which comprises the following steps:

s10: preparing a sleeve 3 and porous ceramic slurry respectively;

s20: placing the sleeve 3 into a mould for fixation, placing the conductive heating element 2 into the mould for fixation, molding the porous ceramic slurry, the conductive heating element 2 and the sleeve 3 together through a hot-press casting or injection molding process, and then demoulding and curing to obtain a green body;

s30: the green body is subjected to glue discharging sintering in a powder embedding sintering mode, and is subjected to heat preservation at 500-600 ℃ for 2-4 hours, so that glue discharging treatment is performed, and the heating rate is 0.5-1.0 ℃/min; then heating to 600-800 ℃ at a heating rate of 1.0-2.0 ℃/min, and keeping the temperature for 2-4 hours to sinter the green compact, thus obtaining the porous ceramic atomizing core.

In one embodiment, in the step S10, the preparation process of the porous ceramic slurry includes:

mixing porous ceramic aggregate, pore-forming agent and sintering aid, and performing ball milling to obtain ceramic powder; wherein the porous ceramic aggregate is at least one of silicon dioxide, aluminum oxide, quartz, diatomite, medical stone and perlite, the pore-forming agent is at least one of PMMA, corn starch, potato starch, wheat starch, wood flour and carbon powder, and the sintering aid is at least one of albite, cooked talcum powder, glass powder, sodium silicate and low-melting-point oxide; the mass fraction of the porous ceramic aggregate is 50-70%, the mass fraction of the pore-forming agent is 0-25%, and the mass fraction of the sintering aid is 0-25%; the particle size of the porous ceramic aggregate is 20-50 microns, the particle size of the pore-forming agent is 20-50 microns, and the particle size of the sintering aid is 0-15 microns; the rotating speed of the ball mill is 0-300 r/min during ball milling, and the ball milling time is 0-4 hours;

heating and stirring the mixed ceramic powder according to the proportion of 70% -100%, paraffin wax of 0-25% and stearic acid of 0-5% to prepare porous ceramic slurry; wherein the stirring time is 0-4 hours, the stirring temperature is 80-100 ℃, the stirring rotating speed is 0-300 r/min, and the prepared porous ceramic slurry is used after the vacuum defoaming.

In one embodiment, in the step S10, the preparation process of the sleeve 3 includes:

forming a ceramic sleeve green body by adopting an injection molding process, and then obtaining a sleeve 3 with high heat conductivity through high-temperature glue discharging and sintering; or the sleeve 3 is obtained directly by machining;

and (5) performing ultrasonic cleaning and drying on the obtained sleeve 3 for standby.

As shown in fig. 5, an embodiment of the present utility model further provides an electronic cigarette atomizer, including the porous ceramic atomizing core described above.

As shown in fig. 1 and 5, as an embodiment, the electronic cigarette atomizer further includes an atomizer housing 4, an oil storage chamber 41 and a flue 42 are disposed in the atomizer housing 4, the oil storage chamber 41 is used for storing tobacco tar, and the oil storage chamber 41 is separated from the flue 42 by a chamber wall 411 of the oil storage chamber 41. The porous ceramic atomizing core is arranged in the flue 42, and the sleeve 3 in the porous ceramic atomizing core abuts against the cavity wall 411 of the oil storage cavity 41. The oil outlet 410 is arranged on the cavity wall 411 of the oil storage cavity 41 at the position corresponding to the oil inlet 31 on the sleeve 3, and the tobacco tar in the oil storage cavity 41 can be conveyed to the porous ceramic body 1 after passing through the oil outlet 410 and the oil inlet 31 in sequence. At this time, the length of the sleeve 3 may be the same as or similar to the length of the porous ceramic body 1 (in this embodiment, the length of the sleeve 3 is slightly longer than the length of the porous ceramic body 1).

As shown in fig. 6 and 7, in another embodiment, the length of the sleeve 3 is much longer than that of the porous ceramic body 1, the flue 42 is not provided in the atomizer housing 4, and the oil reservoir 41 is not provided with the chamber wall 411 on the side close to the sleeve 3. When the porous ceramic atomizing core is assembled into the atomizer housing 4, the sleeve 3 in the porous ceramic atomizing core is directly contacted with the oil storage cavity 41, namely, the side wall of the sleeve 3 is used as the cavity wall of the oil storage cavity 41, and the inner cavity of the sleeve 3 is used as the flue of the atomizer housing 4. At this time, the tobacco tar in the oil storage chamber 41 can be directly transferred to the porous ceramic body 1 through the oil inlet hole 31 of the sleeve 3.

As shown in fig. 1 and 5, as an embodiment, the sleeve 3 in the porous ceramic atomizing core has a circular tubular structure with the same pipe diameter at each part. As shown in fig. 6 and 7, as another embodiment, the sleeve 3 in the porous ceramic atomizing core has a circular tubular structure with a thin upper part and a thick lower part (i.e., the pipe diameter of the upper end of the sleeve 3 is smaller than the pipe diameter of the lower end of the sleeve), which not only can reduce the occupied space of the sleeve 3, but also can store more tobacco tar in the peripheral oil storage cavity 41 (i.e., increase the volume of the oil storage cavity 41), and is beneficial to the backflow of condensate (i.e., condensate generated on the inner wall of the sleeve 3) for secondary atomization, thereby improving the utilization rate of the tobacco tar.

According to the porous ceramic atomization core provided by the embodiment, the auxiliary air holes 12 are formed in the porous ceramic body 1, and the aperture of the auxiliary air holes 12 is smaller than that of the main air holes 11, namely, the auxiliary air holes 12 have smaller apertures, so that the auxiliary air holes 12 have certain capillary force, tobacco tar can be adsorbed and stored in the auxiliary air holes 12, and the oil guiding and storing capacity of the porous ceramic body 1 is further improved; and this auxiliary air hole 12 is close to conductive heating element 2 sets up, and when conductive heating element 2 heats, the tobacco tar that stores in the auxiliary air hole 12 and the tobacco tar of other positions that are close to conductive heating element 2 in the porous ceramic body 1 can supply to the atomizing face in time and atomize to atomization efficiency has been improved.

Meanwhile, the additionally arranged auxiliary air holes 12 can also increase the area of the atomization surface of the porous ceramic body 1, and the effect of multi-surface atomization is achieved by utilizing the cooperation of the main air holes 11 and the auxiliary air holes 12, so that the atomization efficiency and the atomization amount of the porous ceramic atomization core are increased under the condition that the volume of the porous ceramic body 1 and the power of the conductive heating piece 2 are not increased, and the use requirement of a large amount of smoke of a user is met. The additional auxiliary air hole 12 can also be used as an auxiliary air passage, so that the problem of unsmooth suction caused by the special conditions of the main air hole 11 blocked by tobacco tar and the like is avoided.

Meanwhile, as the porous ceramic body 1 and the sleeve 3 are fixed together through sintering, the process is simple, and the step of coating the non-woven fabric outside the porous ceramic body 1 is omitted, so that the production efficiency is improved, and the production cost is reduced; meanwhile, as the porous ceramic body 1 is in direct contact with the sleeve 3, heat on the porous ceramic body 1 can be quickly conducted to the sleeve 3 so as to preheat tobacco tar, and further improve the oil supply speed.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. The porous ceramic atomizing core is characterized by comprising a porous ceramic body (1) with a columnar structure, a conductive heating element (2) and a sleeve (3), wherein a main air hole (11) and at least one auxiliary air hole (12) are arranged on the porous ceramic body (1), and the main air hole (11) and the auxiliary air hole (12) penetrate through the porous ceramic body (1) along the axial direction of the porous ceramic body (1); the main air hole (11) is arranged at the center of the porous ceramic body (1), and the conductive heating element (2) is arranged on the inner wall of the main air hole (11); the auxiliary air holes (12) are arranged around the outer side of the main air holes (11), the auxiliary air holes (12) are arranged close to the conductive heating piece (2), and the aperture of the auxiliary air holes (12) is smaller than that of the main air holes (11); the porous ceramic body (1) is sleeved with the sleeve (3), an oil inlet hole (31) is formed in the position, corresponding to the porous ceramic body (1), of the sleeve (3), and the porous ceramic body (1) and the sleeve (3) are fixed together through sintering.

2. The porous ceramic atomizing core of claim 1, wherein the porous ceramic body (1) has opposite inner (10A) and outer (10B) side walls, and the auxiliary pores (12) are located between the inner (10A) and outer (10B) side walls of the porous ceramic body (1).

3. The porous ceramic atomizing core according to claim 1, characterized in that the pore size of the auxiliary pores (12) is much smaller than the pore size of the main pores (11), and the pore size of the auxiliary pores (12) is smaller than or equal to 1/5 of the pore size of the main pores (11).

4. The porous ceramic atomizing core of claim 1, wherein the auxiliary pores (12) have a pore size of 0.1-0.3mm.

5. The porous ceramic atomizing core according to claim 1, characterized in that a distance between a center of the auxiliary air hole (12) and the conductive heat generating member (2) in a radial direction of the porous ceramic body (1) is 0.2 to 0.5mm.

6. The porous ceramic atomizing core according to claim 1, wherein the number of the auxiliary air holes (12) is plural, and the plurality of the auxiliary air holes (12) are arranged at intervals in the circumferential direction of the porous ceramic body (1) around the main air holes (11) as a center.

7. The porous ceramic atomizing core according to claim 6, wherein a plurality of the auxiliary air holes (12) are uniformly distributed around the main air hole (11) at equal intervals in the circumferential direction of the porous ceramic body (1).

8. The porous ceramic atomizing core according to claim 1, characterized in that the conductive heat generating member (2) is of a mesh structure, and the conductive heat generating member (2) is bent to form a columnar structure.

9. The porous ceramic atomizing core according to any one of claims 1 to 8, characterized in that the sleeve (3) is a ceramic tube having a thermal conductivity of 50-150W/(m-K).

10. An electronic cigarette atomizer comprising the porous ceramic atomizing core of any one of claims 1-9.