CN219920299U - Electronic atomizing device and atomizing core thereof - Google Patents

Abstract

The utility model relates to an electronic atomization device and an atomization core thereof, wherein the atomization core comprises a porous matrix and a heating body, the porous matrix comprises a first surface for bearing the heating body and a second surface which is arranged opposite to the first surface, a heat conduction layer with a porous structure is arranged between the second surface and the first surface, and the porosity of the heat conduction layer is larger than that of the porous matrix; the heating element is arranged on the first surface; this atomizing core is through setting up the heat conduction layer thereby not only can make porous body can buffer memory more liquid matrix to but the direction first surface of higher speed still can preheat the liquid matrix of high viscosity in addition, guarantees the mobility of liquid matrix, further improves the confession liquid, avoids appearing partial confession liquid inadequately, appears partial high temperature and produce the carbon deposit, improves life, improves taste uniformity, improves user experience.

Description

Electronic atomizing device and atomizing core thereof

Technical Field

The utility model relates to the field of atomization, in particular to an electronic atomization device and an atomization core thereof.

Background

The electronic atomizing devices in the related art generally include an atomizing core for atomizing a liquid substrate to generate heat during energization so as to generate aerosol. The atomizing core generally comprises a porous body and a heating element arranged on the porous body, wherein the porous body can be made of high-temperature resistant materials such as ceramics; the heating element may be a metal heating film, a metal mesh, a metal wire, or the like. The porous body of the atomization core is easy to cause insufficient local liquid supply, further causes local high temperature to generate carbon deposition, and has influenced service life, so that the produced aerosol has inconsistent front and rear tastes, and consumer experience is influenced.

Disclosure of Invention

The utility model aims to provide an improved electronic atomization device and an atomization core thereof.

The technical scheme adopted for solving the technical problems is as follows: an atomization core is constructed and comprises a porous matrix and a heating body, wherein the porous matrix comprises a first surface and a second surface which is arranged opposite to the first surface, a heat conduction layer with a porous structure is arranged between the second surface and the first surface, and the porosity of the heat conduction layer is larger than that of the porous matrix; the heating element is arranged on the first surface.

In some embodiments, the thermally conductive layer has a porosity of 80% -99%;

and/or the number of the groups of groups,

the porosity of the porous matrix is more than or equal to 30% and less than 80%.

In some embodiments, the thermal conductivity of the thermally conductive layer is greater than the thermal conductivity of the porous matrix.

In some embodiments, the average pore size of the pores in the thermally conductive layer is greater than the average pore size of the pores in the porous matrix.

In some embodiments, the thermally conductive layer is at least one of a porous metal, a porous ceramic, or a porous glass.

In some embodiments, the ratio of the total volume of pores of the thermally conductive layer to the total volume of porosity of the portion of the porous matrix between the first surface and the thermally conductive layer is from 2:1 to 1:10.

In some embodiments, the distance between the first surface and the thermally conductive layer is 0.2-5mm.

In some embodiments, at least one liquid-conducting through hole is provided in the porous substrate, which communicates the first surface with the heat conducting layer.

In some embodiments, the diameter of the liquid-conducting through hole is 0.05-2mm.

In some embodiments, the cross-sectional area of the liquid guiding hole is gradually increased toward the first surface.

In some embodiments, the liquid guiding holes are multiple, the liquid guiding holes are arranged at intervals, and the interval between two adjacent liquid guiding holes is 0.2mm-2mm.

In some embodiments, the porous matrix includes at least a first portion contiguous with the second surface, and a second portion contiguous with the first surface;

the first portion is identical to the second portion;

alternatively, the first portion and the second portion differ in at least one parameter of porosity and/or average pore size.

The utility model also constructs an electronic atomization device which comprises the atomization core.

The electronic atomizing device and the atomizing core thereof have the following beneficial effects: this atomizing core is through setting up the heat conduction layer that has porous structure and porosity is greater than porous matrix porosity between porous matrix's second surface and first surface to not only can make porous body can buffer memory more liquid matrix, and can more quick direction first surface, but also can preheat the liquid matrix of high viscosity, guarantee the mobility of liquid matrix, further improve the feed liquid, avoid appearing local feed liquid inadequately, appear local high temperature and produce the carbon deposit, improve life, improve taste uniformity, improve user experience.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic structural view of an electronic atomizing device according to a first embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of an atomizing core in the electronic atomizing device shown in FIG. 1;

FIG. 3 is a cross-sectional view of the atomizing core shown in FIG. 2;

FIG. 4 is a schematic view of the porous body of the atomizing core shown in FIG. 3;

fig. 5 is a cross-sectional view of an atomizing core in an electronic atomizing device according to a second embodiment of the present utility model;

fig. 6 is a cross-sectional view of an atomizing core in an electronic atomizing device according to a third embodiment of the present utility model;

fig. 7 is a cross-sectional view of an atomizing core in an electronic atomizing device according to a fourth embodiment of the present utility model;

fig. 8 is a cross-sectional view of an atomizing core in an electronic atomizing device according to a fifth embodiment of the present utility model;

fig. 9 is a cross-sectional view of an atomizing core in an electronic atomizing device according to a sixth embodiment of the present utility model;

fig. 10 is a cross-sectional view of an atomizing core in an electronic atomizing device according to a seventh embodiment of the present utility model.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "upper", "lower", "inner", "outer", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are merely for convenience of description of the present utility model, and do not indicate that the apparatus or element referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that the terms "first," "second," "third," and the like are merely used for convenience in describing the present technology and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features, unless otherwise explicitly or implicitly specified. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

Fig. 1 shows an electronic atomizing device 1 in a first embodiment of the present utility model. The electronic atomizing device 1 is used for heating a liquid substrate to generate aerosol for a user to suck. In some embodiments, the liquid matrix may be a liquid aerosol-generating matrix. The electronic atomizing device 1 has the advantages of long service life, good taste consistency and high user experience.

The electronic atomizing device 1 may include an atomizer a and a power supply assembly B in the present embodiment; the atomizer A can atomize a liquid substrate in an energized state to produce an aerosol. The power supply assembly B is mechanically and/or electrically connected to the atomizer a for supplying power to the atomizer a. The atomizer a may include a housing, an atomizing base, and an atomizing core 100 in this embodiment. A liquid storage cavity is formed on the inner side of the shell and is used for storing liquid matrix. The atomizing base is installed in the housing for accommodating the atomizing core 100, and is formed with an atomizing chamber. An air outlet pipe communicated with the atomization cavity is arranged in the shell. The atomizing core 100 can generate aerosol through the liquid matrix transmitted from the atomizing liquid storage cavity, and the aerosol can be output through the air outlet pipe for the user to suck.

As shown in fig. 2 and 3, the atomizing core 100 includes a porous body 10 and a heating element 20 in this embodiment. The porous body 10 serves to transport the liquid matrix in the reservoir to the heat-generating body 20 by capillary action. The heating element 20 is provided on the porous body 10, and is used to generate high temperature after being electrified, and to heat the liquid matrix to generate aerosol.

As shown in fig. 4, in the present embodiment, the porous body 10 may have a substantially plate shape, specifically, may have a substantially rectangular plate shape. The porous body 10 includes a porous substrate 11. The porous substrate 11 has a substantially plate shape. It will be appreciated that in other embodiments, the porous substrate 11 is not limited to being plate-like, and may be columnar or otherwise shaped. In this embodiment, the porous substrate 11 may be a porous ceramic. Of course, it will be appreciated that in other embodiments, the porous substrate 11 is not limited to porous ceramics, but may be porous metal or porous glass. In this embodiment, the porosity of the porous substrate 11 may be 30% or more and 80% or less, and thus the liquid substrate may be adsorbed and guided to the heating element 20.

In this embodiment, the porous substrate 11 may include a first surface 111 and a second surface 112. The first surface 111 is for carrying the heat-generating body 20 to form an atomizing face. The second surface 112 is disposed opposite to the first surface 111, and the second surface 112 forms a liquid suction surface, which is in fluid connection with the liquid storage cavity and can absorb the liquid matrix in the liquid storage cavity by capillary action. In this embodiment, the first surface 111 and the second surface 112 are both planar. In other embodiments, the first surface 111 and the second surface 112 may be curved or concave-convex.

In this embodiment, the porous body 10 further includes a heat conductive layer 12 having a porous structure. The heat conducting layer 12 is disposed in the porous substrate 11, specifically, the heat conducting layer 12 is disposed between the second surface 112 and the first surface 111, and is disposed in the middle of the porous substrate 11, and is in fluid communication with the first surface 111 and the second surface 112, and can perform heat transfer with both the first surface 111 and the second surface 112. In this embodiment, the distance from the first surface 111 to the heat conducting layer 12 may be 0.2-5mm. Preferably, the distance from the first surface 111 to the heat conducting layer 12 may be 0.3-2mm. That is, the distance from the first surface 111 to the lowest position of the heat conductive layer 12 may be 0.3-2mm, so that the overall strength of the porous body 10 can be ensured while the liquid guiding effect of the heat conductive layer 12 is ensured. In this embodiment, the distance from the heat conducting layer 12 to the first surface 111 may be equal to the distance from the heat conducting layer 12 to the second surface 112, that is, the distance from the top surface of the heat conducting layer 12 to the first surface 111 may be equal to the distance from the bottom surface of the heat conducting layer 12 to the second surface 112. It will be appreciated that in other embodiments, the distance from the thermally conductive layer 12 to the first surface 111 may be less than or greater than the distance from the second surface 112, i.e., the distance from the top surface of the thermally conductive layer 12 to the first surface 111 may be less than or greater than the distance from the bottom surface of the thermally conductive layer 12 to the second surface 112.

The thermally conductive layer 12, which in this embodiment has a porosity greater than the porosity of the porous matrix, may be in fluid communication with the first surface 111 and the second surface 112. The thermal conductivity of the thermal conductive layer 12 is greater than that of the porous substrate 11, that is, the thermal conductive layer 12 can not only absorb the liquid substrate transferred from the second surface 112 and guide the liquid substrate to the first surface 111 by capillary action, but also can be used for preheating the high-viscosity liquid substrate, reducing the viscosity of the high-viscosity liquid substrate and improving the fluidity of the high-viscosity liquid substrate. It should be noted that the preheating includes preheating in two aspects, on one hand, preheating the liquid matrix in the heat conducting layer 12 to reduce the viscosity thereof, and on the other hand, heat can be conducted to the second surface 112 to quickly preheat the liquid matrix on the second surface 112, so as to improve the smoothness of overall liquid guiding, improve the liquid feeding problem of the porous body 10, avoid the occurrence of insufficient local liquid feeding and the occurrence of local high temperature to generate carbon deposition, improve the service life, improve the consistency of taste, and improve the user experience. In this embodiment, the thermally conductive layer has a porosity of 80% to 99%.

In this embodiment, the cavity 121 may be disposed in the porous substrate 11 for filling the first functional porous body 122 to form the heat conductive layer 12. The cavity 121 is located between the first surface 111 and the second surface 112 and is in fluid communication with the first surface 111 and the second surface 112. In this embodiment, the cavity 121 may be a rectangular parallelepiped cavity, however, it is understood that in other embodiments, the cavity 121 is not limited to be rectangular parallelepiped, may be cylindrical or have other shapes, and in other embodiments, the cavity 121 may be irregularly shaped. The first functional porous body 122 is provided in the porous base body 11. Specifically, the first functional porous body 122 is filled in the cavity 121, and the shape and size of the first functional porous body can be adapted to the shape and size of the cavity 121, specifically, the first functional porous body 122 can be rectangular and the height, length and degree of the first functional porous body can be equal to the height, length and width of the cavity 121. It will be appreciated that in other embodiments, the cavity 121 may be omitted and the first functional porous body 122 may be formed as a unitary structure with the porous substrate 11 by sintering.

The first functional porous body 122 has a porosity larger than that of the porous substrate 11. In this embodiment, the porosity of the first functional porous body 122 may be selected to be 80 to 95%. In this embodiment, the heat conducting layer 12 may be a porous metal, for example, a metal foam, copper foam, nickel foam, etc., and specifically, the first functional porous body 122 may be a porous metal, for example, a metal foam, copper foam, nickel foam, etc. Of course, it will be appreciated that in other embodiments, the thermally conductive layer 12 is not limited to being a porous metal, and may be a porous ceramic, such as alumina, silicon carbide, or the like. In the present utility model, the factors influencing the thermal conductivity of the thermal conductive layer 12 and the porous substrate are mainly the type of material and the internal pore structure. Typically, porosity is inversely related to thermal conductivity; that is, the higher the porosity, the smaller the thermal conductivity of the same material. Similarly, in the case of the same structure, the thermal conductivity of the material itself determines the overall thermal conductivity. In some embodiments of the present utility model, the porosity of the heat conducting layer 12 is greater than that of the porous substrate, so, in order to ensure that the overall heat conductivity of the heat conducting layer is greater than that of the porous substrate, the material of the heat conducting layer is preferably a metal material, i.e., the porous metal in the above embodiments, for example, may be foamed metal, foamed copper, foamed nickel, or the like.

In the present embodiment, the average pore size of the pores in the heat conductive layer 12 may be larger than the average pore size of the pores in the porous matrix 11, that is, the average pore size of the pores in the first functional porous body 122 may be larger than the average pore size of the pores in the porous matrix 11. In some embodiments, the porous matrix 11 may have an average pore size of 10-35 μm. Preferably, the average pore size of the porous substrate 11 is 10-20 μm, and the pore size of the porous substrate 11 is smaller than that of the first functional porous body 122, so as to improve the liquid locking effect and prevent the liquid substrate from leaking out of the porous body 10 during the placement of the electronic atomizing device 1. The average pore size of the pores in the first functional porous body 122 is larger than that of the pores in the porous substrate 11, so that the liquid guiding effect can be improved, the liquid supply can be improved, and the liquid supply shortage can be avoided. In other embodiments, the porosity of the first functional porous body 122 may also be increased by increasing the number of pores of the first functional porous body 122.

In this embodiment, the ratio of the total volume of pores of the heat conducting layer 12 to the total volume of pores of the portion of the porous substrate 11 located between the first surface 111 and the heat conducting layer 12 is 2:1 to 1:10. The ratio of the total volume of the pores may determine the maximum upper limit of the liquid supply effect, for example, the single atomization amount is 6mg, the liquid storage amount of the portion of the porous substrate 11 located between the first surface 111 and the heat conducting layer 12 is 4mg, and the liquid storage amount of the heat conducting layer 12 is 2mg; i.e. a ratio of about 1:2.

in the present embodiment, the heating element 20 may be a heating film, and may be disposed on the first surface 111 of the porous body 11 by a silk screen method, however, it is understood that the heating element 20 is not limited to be a heating film, and may be a heating sheet or a heating wire in other embodiments. The heating element 20 is not limited to being provided on the first surface of the porous body 11 by the screen printing method, and may be formed integrally with the porous body 11 by sintering or other methods. In some embodiments, the heater 20 may be a silk screened thick film, a metal thin film, or the like. In some embodiments, the heat-generating film may also be a porous structure, such as a porous metal film.

Fig. 5 shows an atomizing core in an electronic atomizing device according to a second embodiment of the present utility model, which is different from the first embodiment in that the porous base 11 includes a first portion 11a and a second portion 11b. The first portion 11a meets the second surface 112. The first portion 11a is located between the cavity 121 and the second surface 112. The second portion 11b meets the first surface 111. The second portion 11b is located between the cavity 121 and the first surface 111. The first portion 11a, the functional layer 12, and the second portion 11b may be laminated by preparing a casting film or a green body of the corresponding portion, and then sintered to form an integrated structure. In the present embodiment, the first portion 11a and the second portion 11b are different, specifically, at least one of porosity, pore diameter, thermal conductivity, material, and the like thereof may be different. Of course, it will be appreciated that in other embodiments, the first portion 11a and the second portion 11b may be identical, i.e., the porosity, pore size, thermal conductivity, material, etc. of both the first portion 11a and the second portion 11b are identical. The first portion 11a and the second portion 11b are the same, or the corresponding blanks can be directly prepared integrally, and the blanks can be directly sintered and molded.

In this embodiment, the porosity of the second portion 11b may be greater than the porosity of the first portion 11a, in particular, the average pore size of the pores in the second portion 11b is greater than the average pore size of the pores in the first portion 11 a. That is, the second portion 11b can rapidly conduct liquid, and the liquid storage amount is larger, so that the liquid matrix in the heat conducting layer 12 can be rapidly conducted to the first surface 111. The first portion 11b has a liquid-locking effect, avoiding leakage of liquid, in particular of low-viscosity liquid matrix. It will be appreciated that in other embodiments, the number of holes in the second portion 11b may be greater than the number of holes in the first portion 11a, or the size of the holes in the second portion 11b may be greater than the average size of the holes in the first portion 11a, while the number of holes in the second portion 11b may be greater than the number of holes in the first portion 11 a.

Fig. 6 shows an atomizing core in an electronic atomizing device according to a third embodiment of the present utility model, which is different from the first embodiment in that the second portion 11b has a porosity smaller than that of the first portion 11 a; and, the aperture of the second portion 11b is smaller than that of the first portion 11a, so that the liquid guiding rate of the high-viscosity liquid matrix can be improved, and the liquid matrix in the cavity 121 can be quickly guided to the atomizing surface by the first portion 11a by utilizing high capillary pressure after being preheated; improves the liquid supply effect and avoids dry burning.

Fig. 7 shows an atomizing core in an electronic atomizing device according to a fourth embodiment of the present utility model, which is different from the first embodiment in that a plurality of liquid-guiding through holes 113 are provided in the porous base body 11, the plurality of liquid-guiding through holes 113 may be provided at intervals, and the interval between two adjacent liquid-guiding through holes 113 may be 0.2mm to 2mm. Specifically, in the present embodiment, the interval between the adjacent two liquid-guiding through holes 113 may be selected to be 0.4 to 1mm. The liquid-guiding through holes 113 are disposed between the heat-conducting layer 12 and the first surface 111, and are through holes, and extend from the heat-conducting layer 12 to the first surface 111, and each liquid-guiding through hole 113 can be used for communicating the first surface 111 with the heat-conducting layer 12. In this embodiment, the pore size of the liquid-guiding hole 113 is larger than the pore size of the porous substrate 11, and the cross-sectional area is smaller than the cross-sectional area of the cavity 121, so that the liquid substrate can be adsorbed by capillary action and then guided out to the first surface 111, and a large amount of liquid substrate can be prevented from leaking out. In this embodiment, the aperture of the liquid-guiding through hole 113 may be 0.05-2mm; specifically, in the present embodiment, the aperture of the liquid-guiding through hole 113 may be selected to be 0.1 to 0.5mm.

Fig. 8 shows an atomizing core in an electronic atomizing device according to a fifth embodiment of the present utility model, which is different from the first embodiment in that the liquid-guiding through hole 113 is provided with the second functional porous body 13. The porosity of the second functional porous body 13 is greater than that of the porous substrate 11, and specifically, the porosity of the second functional porous body 13 may be greater than 95%. That is, the porosity of the second functional porous body 13 may be larger than that of the first functional porous body 122. It will be appreciated that in other embodiments, the porosity of the second functional porous body 13 is not limited to be greater than the porosity of the first functional porous body 122. By filling the second functional porous body 13, the liquid guiding and storing effects can be ensured, the liquid locking effect can be improved, and the liquid leakage preventing effect can be achieved. In this embodiment, the second functional porous body 13 may have a columnar shape, specifically, the cross-sectional shape and size of the second functional porous body 13 may be equivalent to those of the liquid-guiding through-hole 113, specifically, the cross-sections of the liquid-guiding through-hole 113 and the second functional porous body 13 may have a circular shape, and the diameters thereof may be set substantially equal. In some embodiments, the second functional porous body 13 may be a porous ceramic or a cotton core.

Fig. 9 shows an atomizing core in an electronic atomizing device according to a sixth embodiment of the present utility model, which is different from the first embodiment in that the plurality of cavities 121 may be provided, the plurality of cavities 121 being disposed in the porous base body 11 at intervals, and fluid communication being established between two adjacent cavities 121. The first functional porous body 122 may be disposed in one of the cavities 121, although it is understood that in other embodiments, the first functional porous body 122 may be disposed in a plurality of cavities 121. In this embodiment, the volume of the cavity 121 may be the same. Of course, it is understood that in other embodiments, at least two cavities 121 of the plurality of cavities 121 may be non-equi-volumetric, such as a rectangular parallelepiped cavity 121, wherein at least one parameter of the height, length, and/or width of at least two cavities 121 is different. Specifically, the height of each cavity 121 may be set differently from another cavity 121, so that the volume of each cavity 121 is not equal to another cavity 121. In some embodiments, the distances from at least two cavities 121 of the plurality of cavities 121 to the first surface 111 may also be different, specifically, the distances from the bottom surfaces of at least two cavities 121 of the plurality of cavities 121 to the first surface 111 may be different, so that the liquid matrix guiding-out rates of different areas of the first surface 111 may be different, that is, the liquid matrix guiding-out speed on the first surface 111 is faster in the area closer to the cavity 121, and the liquid matrix guiding-out speed is slower in the area farther from the cavity 121. In this embodiment, the cavity 121 may guide the liquid substrate out to the first surface 111 by providing the liquid guiding hole 113, so as to ensure the temperature uniformity of the first surface 111.

Fig. 10 shows an atomizing core in an electronic atomizing device according to a seventh embodiment of the present utility model, which is different from the first embodiment in that the porous body 11 is columnar as a whole. The porous body 11 is provided with a central through hole 110; the central through hole 110 allows the heating body 20 to be installed therein, and may form an atomization passage. The first surface 111 is an inner wall surface of the porous body 11, and the second surface 112 is an outer wall surface of the porous body 11. The thermally conductive layer 12 may be disposed coaxially with the central through hole 110 and may be substantially annular. In this embodiment, the heating element 20 may be a heating wire.

The porous substrate 11 is provided with a plurality of liquid guiding through holes 113, the liquid guiding through holes 113 are multiple groups, the liquid guiding through holes 113 are arranged at intervals along the axial direction of the central through hole 110, each group of liquid guiding through holes 113 is multiple, and the liquid guiding through holes 113 can be arranged at intervals along the circumferential direction of the central through hole 110. The interval between two adjacent liquid-guiding through-holes 113 is 0.2mm-2mm, and preferably, the interval between the two liquid-guiding through-holes 113 is 0.4-1mm. The aperture of each liquid-conducting through hole 113 may be 0.05-2mm; alternatively, in the present embodiment, the aperture of each of the liquid-passing holes 113 is 0.1-0.5mm.

In the present embodiment, the cross-sectional area of the liquid guiding hole 113 may be gradually increased toward the first surface 111, so as to increase the liquid storage amount of the liquid guiding hole 113, but since the caliber of the liquid guiding hole 113 may meet the requirement of locking liquid by capillary action, the liquid matrix is prevented from leaking from the liquid guiding hole 113 to the central through hole 110 and leaking from the central through hole 110. The liquid-guiding through hole 113 may have a tapered shape. Of course, it is understood that in other embodiments, the liquid guiding hole 113 is not limited to be tapered, and may be stepped or flared.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (13)

1. An atomizing core, characterized by comprising a porous substrate (11) and a heating element (20), wherein the porous substrate (11) comprises a first surface (111) and a second surface (112) arranged opposite to the first surface (111), a heat conducting layer (12) with a porous structure is arranged between the second surface (112) and the first surface (111), and the porosity of the heat conducting layer (12) is larger than that of the porous substrate (11); the heating element (20) is disposed on the first surface (111).

2. The atomizing core according to claim 1, characterized in that said thermally conductive layer (12) has a porosity of 80% to 99%; and/or the number of the groups of groups,

the porosity of the porous substrate (11) is 30% or more and 80% or less.

3. An atomizing core according to claim 1, characterized in that the heat conduction layer (12) has a heat conduction coefficient greater than that of the porous matrix (11).

4. An atomizing core according to claim 1, characterized in that the average pore size of the pores in the heat conducting layer (12) is larger than the average pore size of the pores in the porous matrix (11).

5. The atomizing core of claim 1, wherein the thermally conductive layer (12) is at least one of a porous metal, a porous ceramic, or a porous glass.

6. An atomizing core according to claim 1, characterized in that the ratio of the total volume of pores of the heat conducting layer (12) to the total volume of porosity of the portion of the porous matrix (11) located between the first surface (111) and the heat conducting layer (12) is 2:1 to 1:10.

7. An atomizing core according to claim 1, characterized in that the distance between the first surface (111) and the heat conducting layer (12) is 0.2-5mm.

8. An atomizing core according to claim 1, characterized in that at least one liquid-conducting through hole (113) is provided in the porous matrix (11) communicating the first surface (111) with the heat conducting layer (12).

9. An atomizing core according to claim 8, characterized in that the diameter of the liquid-conducting through hole (113) is 0.05-2mm.

10. An atomizing core according to claim 8, characterized in that the cross-sectional area of the liquid-conducting through hole (113) is arranged to increase gradually in the direction of the first surface (111).

11. The atomizing core according to claim 8, wherein the plurality of liquid-guiding through holes (113) are provided, the plurality of liquid-guiding through holes (113) are arranged at intervals, and the interval between two adjacent liquid-guiding through holes (113) is 0.2mm-2mm.

12. An atomizing core according to claim 1, characterized in that said porous matrix (11) comprises at least a first portion (11 a) contiguous with said second surface (112), and a second portion (11 b) contiguous with said first surface (111); -said first portion (11 a) is identical to said second portion (11 b);

or alternatively, the process may be performed,

-the first portion (11 a) and the second portion (11 b) differ in at least one parameter of porosity and/or pore size.

13. An electronic atomizing device, characterized in that it comprises an atomizing core (100) according to any one of claims 1 to 12.