CN109349681B - Porous heating element, atomizer containing porous heating element and porous body preparation method - Google Patents

Abstract

The invention provides a method for preparing a porous body. The method includes obtaining raw materials according to the following components in various mass percentages: diatomite 50%-75%, alumina 0%-10%, pore-forming agent 15%-35%, clay 5% %～10%, glass powder 5%～15%; mix the raw material and paraffin uniformly to make raw material wax block; press and shape the raw material wax block according to the desired shape to obtain the raw embryo; The temperature is kept for 4-10 hours, and then sintered at 700-1200 DEG C for 2-4 hours to obtain a porous body. Compared with ordinary ceramic rods, the porous body prepared by the present invention is reflected in that the electronic cigarette is easy and fast to emit smoke, and the amount of smoke is relatively large.

Description

Porous heating body, atomizer including porous heating body, and preparation method of porous body

technical field

Embodiments of the present invention relate to the technical field of electronic cigarettes, and in particular, to a porous heating body, an atomizer including the porous heating body, and a method for preparing the porous body.

Background technique

The core component of the electronic cigarette product is the atomizer that evaporates the electronic cigarette oil. The function of the atomizer is mainly based on a porous body and a heating element. Among them, the porous body is a component with capillary pores inside, which can infiltrate, absorb and conduct e-liquid through the internal pores; and the heating element has a heating part for heating and a conductive pin part, and the heating part uses It heats and evaporates the smoke oil conducted by the porous body to form smoke oil aerosol for smoking.

At present, porous bodies usually include porous fibers, porous ceramics, foamed metals, etc.; these porous bodies with rigid structures are usually designed in the form of hollow cylinders/or blocks in use, and the heating element is embedded in the ceramic body, and then Integrally mounted in a fixed size nebulizer housing.

The porous body of the above shape and structure, on the one hand, under the premise that the outer diameter of the porous body is constant, the hollow columnar structure infiltration and oil conduction speed is relatively slow, and it is easy to insufficient oil conduction, causing the decomposition of flavors and fragrances, resulting in insufficient reduction in taste experience, or heating wire Dry burning produces a mushy smell; and the cylindrical shape with a constant outer diameter is inconvenient to set up structural components that are fixed and connected to the atomizer casing, and is inconvenient to achieve stable assembly and sealing.

SUMMARY OF THE INVENTION

In order to solve the problem of oil guiding and assembly of the porous oil-conducting body in the prior art, the embodiment of the present invention provides a porous heating body with better oil-conducting performance and convenient assembly and sealing.

The porous heating body provided by the embodiment of the present invention includes a porous body for conducting liquid, and the porous body includes a first porous part, a second porous part and a a third porous portion; and along the width direction of the porous body, the cross-sectional areas of the first porous portion and the third porous portion are both larger than the second porous portion;

The porous body is provided with a heating element extending along the length direction of the porous body, and the heating element has a heating part for atomizing liquid to generate aerosol; at least a part of the extension length of the heating part along the length direction of the porous body It overlaps with the extended length of the second porous portion.

Preferably, the cross-sectional area of the first porous portion along the width direction of the porous body is constant;

and / or,

The cross-sectional area of the second porous portion along the width direction of the porous body is constant;

and / or,

The cross-sectional area of the third porous portion in the width direction of the porous body is constant.

Preferably, the cross-sectional area of the first porous portion in the width direction of the porous body gradually decreases along the length direction of the porous body and in the direction toward the second porous portion.

Preferably, along the length direction of the porous body and in the direction toward the second porous portion, the first porous portion includes a first oil guide section and a second oil guide section arranged in sequence; wherein,

The cross-sectional area of the first oil guide section along the width direction is constant;

Along the length direction of the porous body and toward the second porous portion, the cross-sectional area of the second oil guide section along the width direction gradually decreases.

Preferably, the cross-sectional area of the third porous portion in the width direction of the porous body gradually decreases along the length direction of the porous body and in the direction toward the second porous portion.

Preferably, along the length direction of the porous body and in the direction toward the second porous portion, the third porous portion includes a third oil guide section and a fourth oil guide section arranged in sequence; wherein,

The cross-sectional area of the third oil guide section along the width direction is constant;

Along the length direction of the porous body and the direction toward the second porous portion, the cross-sectional area of the fourth oil guide section along the width direction gradually decreases.

On the basis of the above porous heating body, the present invention further proposes an atomizer product including the above porous heating body; a specific atomizer includes a hollow outer casing, and the outer casing has an oil storage cavity for storing e-liquid; so The outer casing is also provided with a porous heating body for absorbing e-liquid from the oil storage cavity and atomizing the e-liquid; the porous heating body is the above-mentioned porous heating body.

Preferably, the porous body is further provided with at least one through hole penetrating the first porous part, the second porous part and the third porous part in sequence along the length direction of the porous body.

Preferably, the porous body is further provided with at least one through hole penetrating the first porous part, the second porous part and the third porous part in sequence along the length direction of the porous body.

Preferably, the inner wall of the through hole includes a first e-liquid working surface; and along the radial direction of the through hole, the second porous portion has a second e-liquid working surface corresponding to the first e-liquid working surface ;

And when the number of the through holes is more than two, along the radial direction of the through holes, the distance between the first e-liquid working surface and the second e-liquid working surface is the same.

Preferably, the through hole is used for exporting aerosol; the first e-liquid working surface is configured as an atomizing surface for atomizing e-liquid, and the heating part of the heating element is arranged on the atomizing surface; the The second e-liquid working surface is configured as a liquid contact surface in contact with the e-liquid.

Preferably, the inner wall of the through hole has two opposite atomizing surfaces, and the two atomizing surfaces are provided with a first heating part and a second heating part correspondingly, and the first heating part and the second heating part are connected in parallel or in parallel. connected in series.

Preferably, the through hole is communicated with the oil storage cavity, the first e-liquid working surface is configured as a liquid contact surface in contact with e-liquid, and the second e-liquid working surface is configured as atomized smoke The atomization surface of the oil, and the heat generating part is provided on the atomization surface.

Preferably, the shortest conduction distance of the e-liquid from the liquid contact surface to the corresponding atomizing surface is smaller than the distance between the inner wall of the through hole and the outer surface of the first porous part or the third porous part along the radial direction of the through hole. distance between.

Preferably, the through hole includes a first through hole and a second through hole that pass through the first porous part, the second porous part and the third porous part in sequence along the length direction of the porous body;

The heating element includes a first heating part arranged on the atomizing surface of the first through hole, and a second heating part arranged on the atomizing surface of the second through hole; and the first heating part and the The second heat-generating parts are configured to have different heat-generating temperatures.

Preferably, the outer casing is provided with a flue gas transmission pipe for outputting the smoke gas aerosol generated by the atomization of the porous heating body to the outside of the atomizer, a fixing seat for fixing the porous heating body, and a connection for connecting the The connecting piece of the porous heating body and the flue gas transmission pipe; wherein,

a first accommodating part adapted to the first porous part is arranged on the fixing seat;

the connecting piece has a second accommodating part adapted to the third porous part, and a connecting part connected with the flue gas transmission pipe;

The porous heating body is connected to the fixing base through the cooperation of the first porous part and the first accommodating part, and is connected to the connecting piece through the cooperation of the third porous part and the second accommodating part.

Using the above porous heating element of the present invention, by adopting the porous body in the shape of a dumbbell with a small middle and thick ends, the middle part has a relatively shorter e-liquid conduction distance, and the e-liquid conducts more quickly, which is beneficial to improve e-liquid mist. Oil conductivity during melting. On the one hand, the protruding parts at both ends can store oil and supplement the consumption of e-liquid in the middle part, thereby improving the efficiency of e-liquid replenishment during atomization; on the other hand, it is convenient for fixing and sealing connection with other components; The parts connected to the porous heating element at both ends conduct conduction.

Based on the idea of higher oil-conducting efficiency of the porous body, the present invention also proposes a method for preparing a porous body with high smoke output and smoke output efficiency, and a porous body product prepared according to the method. The method includes the following steps:

Obtain raw materials according to the following components in each mass percentage: diatomite 50%-75%, alumina 0%-10%, pore-forming agent 15%-35%, clay 5%-10%, glass frit 5%-15% ;

The raw material is mixed with the paraffin to make the raw material wax block;

Pressing the raw wax block according to the desired shape to obtain a raw embryo;

The green embryo is first kept at 200-500° C. for 4-10 hours, and then sintered at 700-1200° C. for 2-4 hours to obtain a porous body.

Preferably, the pore-forming agent is selected from at least one of sucrose, starch, wood fiber and short carbon fiber.

Preferably, before the step of making the raw material wax block after mixing the raw material and the paraffin uniformly, it also includes:

The raw material is subjected to wet ball milling treatment in deionized water or absolute ethanol medium.

Preferably, in the step of pressing the raw wax block according to the desired shape,

The press molding is performed under the conditions of a temperature of 70-85° C. and a pressure of 0.4-1 MPa.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute limitations of the embodiments, and elements with the same reference numerals in the drawings are denoted as similar elements, Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

1 is a schematic three-dimensional structure diagram of a porous heating body provided by a preferred embodiment of the present invention;

2 is a schematic cross-sectional view in the longitudinal direction of a porous heating body provided by another embodiment;

3 is a schematic three-dimensional structure diagram of a porous heating body provided by another embodiment;

4 is a schematic cross-sectional view of a porous heating body in the longitudinal direction provided by another embodiment;

5 is a schematic cross-sectional view in the longitudinal direction of a porous heating body provided by another embodiment;

6 is a schematic cross-sectional view of a porous heating body in the longitudinal direction provided by another embodiment;

7 is a schematic cross-sectional view of a porous heating body in the longitudinal direction provided by another embodiment;

8 is a schematic cross-sectional view in the longitudinal direction of a porous heating body provided by another embodiment;

9 is a schematic cross-sectional view of a porous heating body in the longitudinal direction provided by another embodiment;

10 is a schematic cross-sectional view of the porous heating body of the embodiment of FIG. 1 along the length direction;

11 is a schematic cross-sectional view in the longitudinal direction of a porous heating body provided by another embodiment;

12 is a schematic cross-sectional view of a porous heating body in the longitudinal direction provided by another embodiment;

13 is a schematic cross-sectional view in the longitudinal direction of a porous heating body provided by another embodiment;

Fig. 14 is a schematic diagram of the installation of the porous heating element shown in Fig. 12 in the oil storage chamber of the atomizer;

15 is a schematic three-dimensional structure diagram of a porous heating body provided by another preferred embodiment;

FIG. 16 is a schematic cross-sectional view of the porous heating body of the embodiment of FIG. 15 along the length direction;

17 is a schematic structural diagram of a porous heating body provided by another embodiment;

FIG. 18 is a schematic view of the structure of the second porous part with the heating part installed in the embodiment of FIG. 17;

19 is a schematic diagram of an axial cross-section of an atomizer provided by an embodiment of the present invention;

Figure 20 is a schematic exploded view of each component of the porous heating body assembly structure in the atomizer of Figure 19;

FIG. 21 is a schematic structural diagram of the silicone connector in FIG. 20 from another perspective;

FIG. 22 is a scanning electron microscope analysis diagram of the cross-section of the porous body and the conventional ceramic rod prepared in one example.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

The porous heating element of the embodiment of the present invention is mainly suitable for the atomizer of electronic cigarette products. Of course, based on the same oil-conducting atomization function, it can also be extended to be used in liquid drug component volatilization devices or other aromatic component release devices. In the following embodiments of the present invention, electronic cigarettes are used as an example for description.

Figure 1 shows a three-dimensional view of the structure of an embodiment of the porous heating element of the present invention, and the overall shape is generally in the shape of a dumbbell. In the specific implementation, various similar changes can be made on the basis of the shape of FIG. 1 , and the overall shape design structure principle can be described with reference to FIG. 2 . The porous heating body includes a longitudinally extending cylindrical porous body and a heating element in contact with the porous body. The porous body has a microporous structure inside, which is used to penetrate and conduct the e-liquid to provide the heating element. The heating element is used for heating e-liquid to generate aerosol; wherein, the porous body includes a first porous part 10, a second porous part 20, and a third porous part 30 that are coaxially arranged in sequence along the length direction; and,

In the width direction, the outer diameters of the first porous portion 10 and the third porous portion 30 are both larger than the second porous portion 20 .

The porous body of the above structure is divided into three parts in the longitudinal direction, which are the first porous part 10, the second porous part 20 and the third porous part 30 described above in sequence, and the second porous part 30 in the width direction is divided into three parts. The outer diameter of the porous part 20 is smaller than that of the first porous part 10 and the third porous part 30 , so that a cavity 21 opposite to the second porous part 20 is formed on the surface of the porous body, so that the whole is generally dumbbell-shaped shape. The heating element can be formed on the porous body by sintering, printing, coating, etching, etc., or can be assembled on the porous body as an independent part. The structure of the heating element includes two parts, namely the heating part 50 for heating, and the electrode pins (or called conductive connection part, Fig. Electrode pins are not shown in the heating elements of the embodiments 1 to 14, but are shown in FIGS. 15 and 16). The heat-generating portion 50 extends along the length direction of the porous body, and the heat-generating portion 50 is arranged at a position corresponding to the second porous portion 20, that is, at least a part of the extension length of the heat-generating portion 50 along the length direction of the porous body is the same as that of the second porous body. The extension lengths of the holes 20 overlap, thereby improving the oil guiding efficiency and the smoke output. The specific combination of the heating part 50 and the porous body may be as shown in the embodiments of FIG. 7 and FIG. 8 , the heating part 50 is wound on the outer surface of the second porous part 20 , or as shown in FIG. 2 , the heating part 50 adhered to the inner surface of the second porous portion 20 .

Referring to FIG. 14 , when the porous heating body is installed in the oil storage chamber C of the atomizer, the above porous heating body helps to improve the oil conductivity and atomization efficiency in that the inner and outer parts of the second porous part 20 in the width direction are The surfaces are respectively used as the oil absorption surface a and the atomization surface b, that is, the outer surface of the second porous part 20 is defined as the oil absorption surface a in contact with the e-liquid, the inner wall surface of the through hole is defined as the atomization surface b, and the heating part 50 is located in the atomization surface b. On the surface b, the shortest transmission distance d of the e-liquid in the width direction between the oil absorbing surface a and the atomizing surface b is smaller than that between the outer surface of the first porous part 10 or the third porous part 30 and the inner wall surface of the through hole. The oil transmission distance D, therefore, compared with the first porous part 10 and the third porous part 30 at both ends, the conduction efficiency of the e-liquid in the second porous part 20 corresponding to the position of the heating part 50 is higher. On the other hand, the first porous part 10 and the third porous part 30 at both ends form a shape with both ends protruding, which on the one hand can have the effect of storing oil to supplement the consumption of e-liquid in the middle part, thereby improving the efficiency of e-liquid replenishment during atomization; On the other hand, it is convenient to use two fixed connection parts A and B shown in FIG. 14 to connect respectively, which is convenient for fixing and sealing connection inside the atomizer; The volume is larger than that of the second porous part 20, and the heat generated by the heat generating part 50 can be conducted to both ends of the porous body by the first porous part 10 and the third porous part 30 themselves, which can reduce the heat from the second porous part along the length direction. The porous portion 20 is transmitted to the above-mentioned fixed connection members A and B to both ends.

For the porous body shown in the figure, the heating part 50 can adopt a heating coil/sheet heating net/tubular heating tube, etc., and be installed on the porous body by extending along the length direction of the porous body during installation, and let the heating element The heat-generating portion 50 is opposite to the second porous portion 20 in the width direction, that is, it is ensured that at least a part of the heat-generating portion 50 and the second porous portion 20 in the length direction overlaps with the extension length of the second porous portion 20, thereby Has better e-liquid atomization efficiency.

Of course, based on the product structure and functional requirements of general shape specifications, the second porous part 20 is a columnar shape, preferably a columnar/square columnar shape; the first porous part 10 and the third porous part 30 can also be similar to the same. Adjust accordingly. For example, in the embodiment of FIG. 3 , the first porous portion 10 and the third porous portion 30 are designed in a square column shape, and the internal through holes 40 correspond to each other. The inner wall of the through hole 40 has two opposite atomizing surfaces, and the two atomizing surfaces are provided with a first heating part 50a and a second heating part 50b correspondingly, and the first heating part 50a and the second heating part 50b are connected in parallel or in series. way to connect the power components.

Further, based on the requirement that the porous heating body can be used for internal atomization, further in the embodiments other than FIG. 7 , the porous body has the first porous part 10 and the second porous part 10 and the second porous part 10 in the longitudinal direction. The through hole 40 of the part 20 and the third porous part 30; the function and purpose of the through hole 40, on the one hand, can provide the space for installing the heating part 50 such as the spiral heating coil/tubular heating net/heating wire, and on the other hand The through hole 40 can be used as a transmission channel of the smoke gas aerosol, so that the smoke gas aerosol generated by the internal atomization is transmitted to the smoke gas channel of the atomizer.

Further, based on better use and assembly effects, in the porous body of the embodiments of FIGS. 4 to 6 of the present invention, along the length direction and in the direction toward the second porous portion 20 , the width of the first porous portion 10 is wide. The outer diameter of the direction gradually decreases. By designing the first porous part 10 to have a gradually decreasing outer diameter and a transitional shape to the second porous part 20, the transitional shape is more conducive to the infiltration and conduction efficiency of the e-liquid from both ends to the middle, and is conducive to improving the e-liquid. Smoke volume and smoke extraction efficiency. In the above transitional design of the first porous part 10 , the surface of the first porous part 10 will present a shape inclined toward the second porous part 20 , which can usually be carried out in various ways, as shown in FIGS. 4 to 6 . The convex arc surface / concave arc surface / plane and other methods can be carried out.

At the same time, in order to be able to be smoothly and tightly assembled with the silica gel seat in the outer casing in the future, further referring to FIGS. 6 to 13 , the first porous part 10 can also be designed in sections, and the form of the section design is shown in the figure. It includes two parts, respectively a first oil guide section 11 and a second oil guide section 12 arranged in sequence along the length direction of the porous heating body and in the direction of the second porous part 20; wherein,

The first oil guiding section 11 has a cylindrical shape with a constant outer diameter, while the outer diameter of the second oil guiding section 12 gradually decreases along the length direction and toward the second porous portion 20 . Then in the final shape design of this segment, the first oil guiding section 11 can be used as the protruding part at both ends to facilitate the assembly with other components, while the second oil guiding section 12 is used as a transition shape to promote the infiltration and conduction of e-liquid. .

Of course, in the above transitional design, the surface of the second oil-guiding section 12 is inclined toward the second porous portion 20. Usually, various methods can be used, such as the convex curved surface/ Concave arc/plane, or combination, etc. can be used.

Further, the above porous body of the present invention can adopt porous materials such as porous ceramics, porous glass ceramics, porous glass, foamed metal, etc., for example, hard capillary structures such as honeycomb ceramics made of materials such as alumina, silicon carbide or diatomite. production.

It can be seen from the above structure that the third porous part 30 exists corresponding to the first porous part 10 , so the structure and shape of the transition inclination/segmentation of the third porous part 30 above are the same as those of the first porous part 10 . Correspondingly, the third porous portion 30 can also be implemented similarly to that of the first porous portion 10 described above; details are not repeated here.

At the same time, the above porous body and heating element can be obtained separately, and then assembled and combined as shown in each figure to form a complete porous heating body; and in more implementation scenarios and uses, the heating element can also be directly The raw material is sintered on the surface of the porous body. This sintering molding method specifically includes: mixing the raw materials of the heating element (such as nickel metal powder) with a certain amount of sintering aids to form a mixed slurry; and then brushing the mixed slurry according to the desired shape. The heating element formed on the porous body is formed by painting on the inner/outer surface of the porous body to form a printed layer, and then firing. Alternatively, the heating element is a heating circuit provided on the surface of the porous body, and the heating circuit includes but is not limited to the form of a heating material coating, a resistance paste printed circuit, and the like. The porous body and the heating element are made into an integral structure, which can prevent the heating element from being deformed or broken and affecting the heating performance.

Moreover, in addition to the above surface setting method, the heating element heating part 50 can also be installed by the internal embedding method as shown in FIG. 13; The heating part 50 is only carried out when the surface is in contact, but the part close to the heating part 50 in the porous body starts to be heated and atomized; The e-liquid is not in direct contact with the heating part 50 during atomization, which can avoid metal pollution caused by the heating element contained in the aerosol.

On the basis of the same idea as above, the present invention also proposes a porous heating element according to another preferred embodiment. The structure of the porous heating element in this preferred embodiment is shown in FIG. 15 to FIG. 17 ; The number of through holes inside the porous heating body is correspondingly increased, and the corresponding change design of the structure is carried out in combination with the atomization efficiency; The through holes of the hole portion 20 and the third porous portion 30 are respectively a first through hole 40a and a second through hole 40b.

Referring to FIG. 15, due to the structural arrangement of the first through hole 40a and the second through hole 40b, the surface of the overall porous body is divided into four parts, which are the first inner surface n of the first through hole 40a, and the first through hole 40a. The first outer surface m corresponding to the hole 40a, the second inner surface k of the second through hole 40b, and the second outer surface j corresponding to the second through hole 40b.

For the two corresponding surfaces m and n of the first through hole 40a, the first inner surface n can be configured as an atomizing surface/oil absorbing surface, and the first outer surface m can be configured as an oil absorbing surface/atomizing surface, respectively, as required. , so that one of them is used for oil absorption and the other is used for atomization; at the same time, a heating part 50 (which can be embedded in the surface or attached to the surface) is arranged on the surface configured as the atomization surface, such as in FIG. 16 . The first heat generating part 50a provided on the first inner surface n is shown when it is the atomizing surface. In addition, the two corresponding surfaces k and j of the second through-hole 40b can also be respectively made one for oil absorption and the other for atomization, and the second heating part 50b corresponding to the atomization surface is installed.

Of course, it should be noted that the embodiments in Fig. 15 and Fig. 16 are the preferred designs when the number of through holes is two; in other variant implementations, when the volume of the porous body is sufficient, the through holes can be increased accordingly. The number of holes is 3/4 or more, and the heating part is installed correspondingly, so that the porous heating body has faster oil conduction and atomization efficiency. At the same time, the atomizing surface/heating surface in FIG. 16 can also be configured in reverse, so that the first outer surface m and the second outer surface j are the atomizing surface, and the first inner surface n and the second inner surface k are used as the oil absorbing surface. ; then, the first heating part 50a/the second heating part 50b can be adjusted to be respectively arranged at positions close to the first outer surface m/the second outer surface j. The specific setting method of the heat generating part 50 attached to the outer surface can be performed by surface attachment similar to that shown in FIG. 7 and FIG. 8 , or by surface embedding and embedding (technical personnel can easily understand and implement, so there is no detailed description of the drawings) .

In the implementation, the first heating part 50a and the second heating part 50b and the porous body can be formed on the porous body by sintering, printing, coating, etching and other methods described above.

At the same time, a flue gas mixing chamber 41 that communicates with the first through hole 40a and the second through hole 40b at the same time is further provided on the porous body. , and will be collected and mixed in the flue gas mixing chamber 41 along the transmission direction, and then output from the flue gas mixing chamber 41 to the flue gas pipeline of the atomizer. Two or more expansion functions can be realized through the flue gas mixing chamber 41. On the one hand, it can be used as a mixing space for flue gas aerosol, which has the functions of guiding and outputting the flue gas dispersed in each through hole; In one aspect, the smoke mixing function of the smoke mixing chamber 41 can further be used to adjust the taste of the smoke. Specifically, it can be performed by setting different heating temperatures for the first heating part 50a and the second heating part 50b, for example, setting the heating temperature of the first heating part 50a lower than that of the second heating part 50b. Since the flavor components in e-liquid (the components of e-liquid are mainly vegetable glycerin, propylene glycol and flavor in addition to nicotine) have a low boiling point, a high boiling point of vegetable glycerin, and middle propylene glycol; the heating temperature of the first heating part 50a When the setting is lower than the second heat generating part 50b, the flavor of the smoke component generated in the first through hole 40a will be heavier than the smoke generated in the second through hole 40b, and the vegetable glycerin component will be stronger than the second through hole 40b. 40b is less; then through different heating power, the mixed aerosol taste can be produced to produce a different taste from the smoke generated in the respective through holes. Further, by controlling more changes of the first heating part 50a and the second heating part 50b according to different power outputs, the end user can inhale more smoke with different tastes.

Further corresponding to the structure of multiple through holes, the shape design of the outer surface of the porous body is described by taking the first through hole 40a/the second through hole 40b in FIG. The shapes of the first outer surface m and the second outer surface j corresponding to the second through hole 40b are longitudinally long circular arc surfaces arranged coaxially with the through hole. The purpose is to make along the radial direction of the first through hole 40a, the distances from the first outer surface m to the first inner surface n are equal; and along the radial direction of the second through hole 40b, the second outer surface The distances between the surfaces j and the second inner surface k are equal; the shape design of the outer surface of the porous body is used to make the oil conduction rate in each through hole uniform and stable.

And when the outer surface design of the above shape is adopted, a groove 22 will be formed at the junction of the first outer surface m and the second outer surface j, and the groove 22 is beneficial to the first through hole 40a and the second through hole 40b. The oil guiding is carried out in the part f between the first through holes 40a and the second through holes 40b to make up for the insufficiency of slow oil guiding when the thickness of the part f between the first through hole 40a and the second through hole 40b is larger than that of the parts e on both sides.

Meanwhile, when the above first through hole 40a/second through hole 40b are round holes, the first through hole 40a/second through hole 40b can also be made of the square hole in the embodiment of FIG. See Figure 17 and Figure 18 for the structure of the porous body in the design of the shape of a 17 and 18 are described in two ways. specific,

The first through hole 40a of the porous body having a square shape will form four inner wall surfaces, in FIG. Two heat-generating parts 50b; a pair of inner wall surfaces L1 and L2 where the first heat-generating part 50a and the second heat-generating part 50b are located can respectively be opposite to the outer surface L3 and the outer surface of the outer surface of the second porous part 20 L4 is parallel and opposite; then the inner wall surface L1 and the outer surface L3, the inner wall surface L2 and the outer surface L4 are respectively configured as the atomization surface/oil absorption surface, then the distance of e-liquid conduction is uniform and the same, ensuring the uniform and stable oil conduction rate.

18, the third heat generating part 50c and the fourth heat generating part 50d of the second through hole 40b are located on the pair of inner wall surfaces L5 and L6, respectively, and the inner wall surface L6 can be parallel to the outer surface L8 of the porous body, so When the inner wall surface L6 is configured as an atomizing surface, the outer surface L8 is an oil absorbing surface, which conducts e-liquid conduction well; while the inner wall surface L5 does not have a porous outer surface that can conduct relatively good oil; a third channel can be further arranged on the porous body. The hole 40c and the third through hole 40c are only used for oil absorption, so the inner wall surface L5 of the second through hole 40b has an opposite inner wall L7 located in the third through hole 40c, which is used to configure the inner wall surface L5 as an atomizing surface When the corresponding as the oil absorption surface. Under various circumstances, the conduction distance of the e-liquid from the oil absorbing surface to the atomizing surface is uniform and the same, so as to ensure the uniform and stable oil conduction rate, and the porous heating body emits smoke well.

In addition, it should be noted that the heat generating parts (such as the first heat generating part 50a, the second heat generating part 50b, the third heat generating part 50c and the fourth heat generating part 50d) in the above embodiments can be installed with electrode pins respectively. It can form independent heating elements; it is also possible to make the above heating parts belong to the same heating element, and finally share a group of pins for power supply by means of parallel/series connection during installation.

The above structural design enables the second porous portion 20 to have an e-liquid working surface corresponding to the inner wall of the first through hole 40a/the second through hole 40b (that is, the above-mentioned e-liquid for atomization or e-liquid contact) One; through the description of the third through hole 40c above, the e-liquid working surface is not necessarily limited to being formed by the surface of the second porous part 20), and the inner sidewall of the first through hole 40a/the second through hole 40b is the same as the The distances between the corresponding e-liquid working surfaces in the respective radial directions are the same, so that when they are respectively configured as one of the atomizing surface and the oil-absorbing surface, they can have uniform and good e-liquid conduction and stable smoke extraction efficiency.

Of course, the second porous part 20 may not be provided with the structure of the third through hole 40c. Then, based on the requirement of high oil conduction and smoke extraction rate, the heat generating part can be provided on other inner wall surfaces other than the inner wall surface L5. ; or without the requirement of high oil-conducting smoke extraction rate, when the second porous part 20 does not have the structure of the above third through hole 40c, the smoke oil atomized on the inner wall surface L5 is separated from the second porous part 20 Relatively far away from other locations, the efficiency of smoke extraction is slightly lower than that of oil guide.

On the above basis, when the shape of the through hole is deformed into other shapes such as polygons/or the number of through holes is increased to 3/4 or more, the second porous part 20 is still formed with the surface or the added structure The inner wall of the hole corresponds to the e-liquid working surface with the same spacing, and then one of them is configured as the atomizing surface or the oil-absorbing surface for use, to ensure that the oil conduction rate is uniform and stable, and the porous heating body emits smoke well.

Using the above porous heating element of the present invention, by changing the porous body into a dumbbell-like shape, the middle part has a relatively shorter e-liquid conduction distance, which is beneficial to improve the e-liquid conductivity during atomization. On the one hand, the protruding parts at both ends can store oil and supplement the consumption of e-liquid in the middle part, thereby improving the efficiency of e-liquid replenishment during atomization; on the other hand, it is convenient for fixing and sealing connection with other components; External heat dissipation.

On the basis of the content of the above porous heating body, the present invention further provides an atomizer product comprising the above porous heating body. The structure of the atomizer is illustrated by taking an electronic flat cigarette as an example, and the example structure can refer to the embodiment shown in FIG. 19 .

The atomizer structure shown in FIG. 19 includes a hollow outer shell 100. The outer shape of the outer shell 100 can be designed into a regular geometric cylindrical shape (such as a cylinder, a cylinder, etc.) according to the shape requirements of different products, or as The embodiment shown in FIG. 19 shows a flat shape in which the thickness dimension is smaller than the width dimension. The lower end of the hollow outer casing 100 is open, and the opening is used for filling e-liquid and facilitating the installation of necessary atomization structures in the hollow outer casing 100, such as the above-mentioned porous heating body 400, seals, bases, electrode terminals, etc.

Inside the outer casing 100, there is a smoke transmission pipe 110 arranged in the axial direction, which is used to transport the smoke aerosol after atomization; therefore, based on the general design of electronic cigarette products, the upper port of the smoke transmission pipe 110 is used as a suction device for smoking. The mouth and the lower end are connected with the atomizing component, so that the smoke aerosol generated by the atomizing component can be delivered to the smoker for smoking. At the same time, the hollow portion between the outer side wall of the flue gas transmission pipe 110 and the inner side wall of the housing 100 forms an oil storage cavity 120 for storing the smoke oil.

As can be seen from the figure, the porous heating body 400 installed at the lower end of the flue gas transmission pipe 110 adopts the dumbbell-shaped design with through holes shown in the embodiment of FIG. 12 above, and the heating element is installed inside; The heating element has an axially extending heating portion 500 . Meanwhile, during installation, the porous heating body 400 and the flue gas transmission pipe 110 are coaxially arranged to ensure that the connection between the through hole in the middle and the flue gas transmission pipe 110 is more smooth. At the same time, in order to ensure that the heating part 500 can be subsequently connected with the power supply assembly of the electronic cigarette to realize electric heating, the heating element also has conductive pins 800 respectively arranged at both ends of the heating part 500, and two electrode terminals are installed on the plastic end cover 900. 810, the conductive pins 800 are welded or contacted with the two electrode terminals 810, so that after the atomizer is matched with the power supply assembly, the electrode terminals 810 are connected to the positive and negative electrodes of the power supply assembly to supply power to the heating part 500.

At the same time, the lower end of the oil storage chamber 120 is provided with a silicone seat 700 along the axial direction. The silicone seat 700 is used to seal the lower end of the oil storage chamber 120 so as to prevent the leakage of e-liquid.

At the same time, a plastic end cap 900 which is closed with the open end of the outer casing 100 is further provided on the open lower end of the hollow outer casing 100 to cover the lower end of the hollow outer casing 100. The shape and connection of the plastic end cap 900, technology Personnel can design and adopt various changes according to the purpose of capping. At the same time, a stainless steel casing 910 can also be arranged at the lower end of the hollow outer casing 100 to cover the lower end and part of the outer surface of the outer casing 100, on the one hand, the stable assembly of the internal components is strengthened, and on the other hand, the color effect of the metallic color makes the appearance of the product more attractive. beauty.

On the basis of the above structure, the fixing and assembly of the porous heating body 400 in the atomizer product is usually not convenient; based on this deficiency, the atomizer in the embodiment of the present invention is designed for the shape of the above dumbbell-shaped porous heating body 400 Features, matching design fixed and sealed installation structure, assembly and connection structure refer to Figure 19 to Figure 20. Specifically, a silicone connector 600 is used to cooperate with the silicone seat 700 to realize this. Specifically, the fixed assembly is described by taking the porous heating element of the embodiment shown in FIG. 12 as an example.

The silicone connector 600 is used for connecting the flue gas transmission tube 110 and the porous heating body 400. Since the porous heating body 400 is in the shape of a dumbbell, it includes the first porous part 10 and the second porous part coaxially arranged in the length direction above. 20 , and the third porous portion 30 ; and the outer diameters of the first porous portion 10 and the third porous portion 30 are both larger than the second porous portion 20 .

Based on the protruding shape of the first porous part 10 and the third porous part 30 at both ends compared to the second porous part 20 , a first accommodating part 710 for accommodating the third porous part 30 is provided on the silica gel seat 700 ; A second accommodating portion 620 for accommodating the first porous portion 10 is provided on the connecting member 600 .

Further, since the third porous part 30 has a transitional outer surface with a gradually decreasing outer diameter, the shape of the first accommodating part 710 can be adapted to the third porous part 30, then due to the shape adaptation, it can be It forms a snap connection with the third porous portion 30 ; and the second accommodating portion 620 can also be designed to fit with the shape of the first porous portion 10 , and can be snapped and connected with the first porous portion 10 . The way of accommodating and engaging can be clearly seen from the sectional view of FIG. 19 . At the same time, the silicone connector 600 and the silicone base 700 are both made of flexible silicone material, which is also very convenient during assembly.

The silicone connector 600 is further provided with a connecting portion 610 that is connected to the flue gas transmission pipe 110. As shown in the embodiments of FIG. 19 and FIG. 20, the 610 adopts a slot that is adapted to the shape of the flue gas transmission pipe 110. Design: When connecting and assembling, inserting the lower end of the flue gas transmission pipe 110 into the slot can stabilize the interference fit and form a sealed connection. It should be noted that, in addition to the most simple slot design above, the connecting portion 610 can also be connected by a common tubular structure such as a hook, a pipe clip, a pin, etc. Of course, these structural technicians are very easy to obtain. The detailed diagrams are not listed one by one.

Then, the silica gel connector 600 and the silica gel seat 700 correspond to the protruding shapes of the two ends of the porous heating body 400, and can be matched with the accommodating parts of the design connection and assembly respectively, so that the fixed assembly of the porous heating body 400 can be realized; Better sealing effect.

At the same time, according to further requirements to ensure the smooth flow of flue gas circulation, a flue gas flow hole needs to be opened on the silicone connector 600. One end of the flue gas flow hole is connected to the lower end of the flue gas transmission pipe 110, and the other end is connected to the porous heating body. The axial through hole 40 of 400 is connected to each other; the silica gel seat 700 is provided with an air intake through hole according to the existing usual method to ensure that the outside air can enter and realize the smooth air circulation in the atomizer.

At the same time, the silica gel seat 700 is used as the fixed base of the porous heating body 400, and needs to be fixed by itself. In the figure, it can be directly pressed with the plastic end cap 900/and the inner wall of the outer shell 100 can be abutted and fixed; or when other types of atomizers are used When the plastic end cap 900 is integrated with the outer casing 100, it can be considered that the outer casing 100 as a whole has an abutting portion for abutting/installing the silicone seat 700, and then the silicone seat 700 is abutted and fixed by the abutting portion. Can.

In the above embodiment, the outer surface of the porous heating body 400 in the atomizer can be covered with a layer of fiber cotton/non-woven fabric to prevent the porous heating body made of ceramics and other materials from soaking the e-liquid for a long time to remove the powder, and mixing it with the atomization In the generated aerosol, it affects the taste of smoking.

In the example of the fixed assembly of the porous heating element shown in FIG. 12 in the above embodiment, the deformed porous heating element with multiple through holes shown in FIGS. 15 to 18 can also be assembled according to the above structure.

Using the atomizer of the above embodiments of the present invention, for the protruding parts at both ends of the porous heating body, the connection and assembly parts made of silica gel are added to perform corresponding connection and assembly, so as to realize convenient installation and sealing; The dumbbell-like shape of the body is beneficial to enhance the oil conductivity of the middle part. After the heating body is installed in this part, the smoke output and smoke output efficiency can be enhanced.

Based on the above structure, based on the concept of improving the overall pore and smoke output, the present invention further proposes a porous body for preparing higher e-liquid conduction and smoke output efficiency, and the preparation method includes the following steps:

S10, obtain raw materials according to the following components in each mass percentage: diatomite 50%-75%, alumina 0%-10%, pore-forming agent 15%-35%, clay 5%-10%, glass frit 5%- 15%;

S20, the above raw materials are mixed with paraffin to prepare a raw wax block;

S30, pressing and molding the raw material wax block obtained in step S20 according to the final desired product shape to obtain a green embryo;

S40, the green embryo is first kept at 200-500 DEG C for 4-10 hours, and then sintered at 700-1200 DEG C for 2-4 hours to obtain a porous body.

In the above preparation process of the present invention, in step S10, specific matching and selected components are used as the original porous body, diatomite is used as the main ceramic material, and the pore-forming agent is used to form pores during the sintering process; And change the properties of rigidity, hardness, etc., and finally form a more suitable porous body. The pore-forming agent is selected from at least one of sucrose, starch, wood fiber and short carbon fiber; using these starch, sucrose, wood fiber and short carbon fiber as a complex organic or inorganic matter with a large particle size as the pore-forming agent, it can be used as required. The pore size and porosity of the finally formed porous ceramic are controlled to obtain a connected pore structure suitable for storing, conducting liquid and generating smoke.

Among them, based on the combination of components in the final sintering process and the property requirements of the final porous body, the glass powder adopts high-temperature glass powder (melting point of 800-1300°C) instead of low-temperature glass powder (melting point of 320-600°C).

In step S20, paraffin wax is used as a molding binder medium, and each raw material is mixed and bonded with paraffin wax to form a raw material wax block, and then subsequent sintering is performed; and wherein, when step S20 is implemented, each material in step S10 can be mixed first. After the paraffin is melted into a liquid at 80°C, the mixed powder is poured into the mixed powder and cooled while stirring, so that the mixed powder and the paraffin are evenly wrapped, and the raw wax block is made.

Step S30 further compresses the raw wax block to form the preliminary shape of the final product; the process of pressing and molding can be carried out with a molding machine equipment, and during implementation, the raw wax block is converted into a wax cake at 70-85° C. and a pressure of 0.4-1 MPa The slurry is then injected into a mold to obtain a porous body shaped green body in a desired shape.

The firing process of the final step S40 is divided into two steps, first degreasing at 200-500°C to remove the paraffin binder in the green body, and then adjusting the temperature to sintering at 700-1200°C to obtain the desired shape , pores and pore size of porous bodies.

At the same time, in the implementation of the above steps, in order to make the quality of the final preparation better, some detailed processing steps that can further promote the quality can be added; specifically,

Before step S20, including:

S11: Pour diatomite, alumina, pore-forming agent, clay, and glass powder into the planetary ball mill according to the above proportions, and wet ball milling for 5 hours. The ball milling medium is deionized water or anhydrous ethanol. uniform, and finally obtain a uniform mixed powder.

In order to make the details of the preparation method of the above porous body of the present invention more conducive to the understanding and implementation of those skilled in the art, and to highlight the improvement effect of the porous body prepared in this case in performance and quality, the following specific examples are used to describe the content of the above method. Give an example.

Example 1

S10, obtain the following raw material components of each mass percentage: 70 g of diatomaceous earth, 3 g of alumina, 15 g of wood fiber pore-forming agent, 5 g of clay, and 7 g of high-temperature glass powder;

S11, pour each raw material of step S10 into a planetary ball mill for wet ball milling for 5h, and the ball milling medium is deionized water to obtain a uniform mixed powder;

S20, melt an appropriate amount of paraffin into a liquid at 80°C, pour it into the mixed powder in step S11, and cool it while stirring, so that the mixed powder and paraffin are evenly wrapped to prepare a raw wax cake;

S30, pour the raw wax cake into the molding machine, control the temperature to 70° C. and the pressure to 0.4 MPa, and inject the wax cake slurry into a mold corresponding to the shape of the porous body of the embodiment in FIG. 1 to obtain a green body for molding;

S40, the green body is first kept at 200° C. for 10 hours, and then sintered at 700° C. for 4 hours to obtain a sintered porous body.

Example 2

S10, obtain the following raw material components of each mass percentage: 65 g of diatomaceous earth, 25 g of sucrose pore-forming agent, 5 g of clay, and 5 g of high-temperature glass powder;

S11, pouring the raw materials in step S10 into a planetary ball mill for wet ball milling for 4h, and the ball milling medium is absolute ethanol to obtain a uniform mixed powder;

S20, melt an appropriate amount of paraffin into a liquid at 80°C, pour it into the mixed powder in step S11, and cool it while stirring, so that the mixed powder and paraffin are evenly wrapped to prepare a raw wax cake;

S30, pour the raw wax cake into the molding machine, control the temperature to 85° C. and the pressure to 1 MPa, and inject the wax cake slurry into a mold having a shape corresponding to the porous body of the embodiment in FIG. 1 to obtain a green body for molding;

S40, the green body is first kept at 500° C. for 4 hours, and then sintered at 1200° C. for 2 hours to obtain a sintered porous body.

Example 3

S10, obtain the following raw material components in each mass percentage: 58 g of diatomaceous earth, 5 g of alumina, 20 g of sucrose pore-forming agent, 5 g of clay, and 12 g of high-temperature glass powder;

S11, pouring the raw materials in step S10 into a planetary ball mill for wet ball milling for 4h, and the ball milling medium is absolute ethanol to obtain a uniform mixed powder;

S20, melt an appropriate amount of paraffin into a liquid at 80°C, pour it into the mixed powder in step S11, and cool it while stirring, so that the mixed powder and paraffin are evenly wrapped to prepare a raw wax cake;

S30, pour the raw wax cake into the molding machine, control the temperature to 80° C. and the pressure to 0.8 MPa, and inject the wax cake slurry into a mold corresponding to the shape of the porous body of the embodiment in FIG. 1 to obtain a green body for molding;

S40, the molded green body is first kept at 300° C. for 6 hours, and then sintered at 1000° C. for 3 hours to obtain a sintered porous body.

Example 4

S10, obtain the following raw material components in each mass percentage: 55 g of diatomaceous earth, 10 g of alumina, 15 g of sucrose pore-forming agent, 10 g of clay, and 10 g of high-temperature glass powder;

The remaining steps were carried out according to the same steps as in Example 3 to obtain the final sintered porous body.

In order to verify the properties of the porous bodies prepared in the above examples, the pores and pore diameters of the porous bodies were detected with a scanning electron microscope. The results are as follows:

Example Porosity Average pore size Example 1 65% 61μm Example 2 78% 67μm Example 3 70% 63μm Example 4 72% 64μm

Therefore, it can be seen from the above detection results of micropore diameter and porosity that the porosity of the porous body prepared in the embodiment of the present invention can basically reach 70%, which is 30-60% compared with the porosity of ordinary ceramic rods; The porous body of Example 4 and the common ceramic rod were respectively cross-sectioned for microscopic analysis, and the results are shown in FIG. 22 at a magnification of 200 times. In Figure 22, the left half is the porous body of Example 4, and the right half is a common ceramic rod on the market. From the results, it can be seen that the pore size of Example 4 is 64.52 μm, and the microscopic analysis result of the common ceramic rod, the pore size is 46.49 μm. Compared with ordinary ceramic rods, the porous body prepared by the present invention is reflected in that the electronic cigarette is easy and fast to emit smoke, and the amount of smoke is relatively large.

It should be noted that the description of the present invention and the accompanying drawings provide preferred embodiments of the present invention, but are not limited to the embodiments described in this specification. Improvements or changes are made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims (5)

1. a porous body preparation method, described porous body is used for atomizer, it is characterized in that, method comprises the steps: Obtain raw materials according to the following components in each mass percentage: diatomite 50%-75%, alumina 3%-10%, pore-forming agent 15%-35%, clay 5%-10%, glass powder 5%-15% ; The raw material is uniformly mixed with the paraffin to make the raw material wax block; Pressing the raw wax block according to the desired shape to obtain a raw embryo; The green embryo is first kept at 200-500° C. for 4-10 hours, and then sintered at 700-1200° C. for 2-4 hours to obtain a porous body. 2 . The method for preparing a porous body according to claim 1 , wherein the pore-forming agent is selected from at least one of sucrose, starch, wood fiber and short carbon fiber. 3 . 3. The method for preparing a porous body as claimed in claim 2, characterized in that, before the step of making the raw material wax block after mixing the raw material and the paraffin homogeneously, it also comprises: The raw material is subjected to wet ball milling treatment in deionized water or absolute ethanol medium. 4. The method for preparing a porous body according to claim 2, wherein in the step of pressing the raw wax block according to a desired shape, The press molding is performed under the conditions of a temperature of 70-85° C. and a pressure of 0.4-1 MPa. 5 . A porous body, wherein the porous body is used in an atomizer, wherein the porous body is prepared according to the method for preparing a porous body according to any one of claims 1 to 4 .

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