Patent Application
20230309617
Priority is claimed to Chinese Patent Application No. 202210336213.6, filed on Mar. 31, 2022, the entire disclosure of which is hereby incorporated by reference herein.
The present invention relates to the field of electronic vaporization, and more specifically, to an electronic vaporization device and a vaporization core thereof, a porous body, and a manufacturing method of the porous body.
An electronic vaporization device in the related technology usually includes a liquid storage cavity for accommodating a liquid aerosol-generation substrate and a vaporization core in connection with the liquid storage cavity in a liquid guiding manner. An energized vaporization core can generate heat to heat and vaporize the liquid aerosol-generation substrate, to form an aerosol. The vaporization core is a core component of the electronic vaporization device, and in the related technologies, most of the vaporization cores use a ceramic vaporization core. However, in the related technologies, the comprehensive performance of the ceramic vaporization core is relatively poor, for example, there are defects such as a low e-liquid guiding rate, prone to dry burning failure, and a short service life.
In an embodiment, the present invention provides a porous body for an electronic vaporization device, comprising: a first surface; a second surface opposite the first surface; and at least two unit layers sequentially arranged along a direction from the first surface to the second surface, one layer of the at least two unit layers comprising at least a liquid storage advantage layer or a liquid locking advantage layer, and each other unit layer of the at least two unit layers comprising a liquid storage advantage layer and a liquid locking advantage layer combined with the liquid storage advantage layer.
Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following:
In an embodiment, the present invention provides an improved electronic vaporization device and a vaporization core thereof, a porous body, and a manufacturing method of the porous body.
In an embodiment, the present invention provides a porous body, configured for an electronic vaporization device, where the porous body includes a first surface, a second surface opposite to the first surface, and at least two stacked unit layers arranged along a direction from the first surface to the second surface, one of the at least two unit layers includes a liquid storage advantage layer and a liquid locking advantage layer stacked together with the liquid storage advantage layer, and the other of the at least two unit layers includes at least a liquid storage advantage layer or a liquid locking advantage layer.
Each unit layer of the at least two unit layers includes a liquid storage advantage layer and a liquid locking advantage layer stacked together with the liquid storage advantage layer, and the liquid storage advantage layers and the liquid locking advantage layers of the at least two unit layers are stacked together along the direction from the first surface to the second surface.
In some embodiments, the thickness of the liquid locking advantage layer ranges from 10 µm to 200 µm.
In some embodiments, the thickness of the porous body ranges from 0.8 mm to 3.0 mm.
In some embodiments, an average porosity of the porous body ranges from 50% to 75%.
In some embodiments, the thickness of each unit layer ranges from 0.1 mm to 1.5 mm.
In some embodiments, the liquid storage advantage layer includes a large-pore-size structure layer, the liquid locking advantage layer includes a small-pore-size structure layer, and an average pore size of the large-pore-size structure layer is 1.5 to 2.5 times of an average pore size of the small-pore-size structure layer.
In some embodiments, the liquid storage advantage layer includes a large-pore-size structure layer, the liquid locking advantage layer includes a small-pore-size structure layer, an average pore size of the large-pore-size structure layer ranges from 50 µm to 150 µm, and an average pore size of the small-pore-size structure layer ranges from 20 µm to 100 µm.
In some embodiments, the liquid storage advantage layer includes a high porosity layer, the liquid locking advantage layer includes a low porosity layer, and a porosity of the high porosity layer is 1.2 to 2 times of a porosity of the low porosity layer.
In some embodiments, the liquid storage advantage layer includes a high porosity layer, the liquid locking advantage layer includes a low porosity layer, a porosity of the high porosity layer ranges from 55% to 90%, and a porosity of the low porosity layer ranges from 55% to 90%.
In some embodiments, the porous body is one or a combination of more than one of porous alumina ceramic, porous silicon oxide, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite, and composite porous ceramic.
A manufacturing method of the porous body of is provided, including the following steps:
In some embodiments, the green compacts in the step (A) are formed by flow casting or extrusion.
In some embodiments, among the green compacts in the step (A), part of the green compacts are formed by flow casting, and part of the green compacts are formed by extrusion or injection molding.
A vaporization core is provided for an electronic vaporization device, including a heating body and further including the foregoing porous body, where the heating body is arranged on the surface of the liquid storage advantage layer or the liquid locking advantage layer of one of the at least two unit layers.
In some embodiments, the heating body is a porous heating film or a metal heating sheet.
An electronic vaporization device is provided, including a liquid storage cavity and a vaporization cavity, and further including the foregoing vaporization core, where the surface of the porous body on which the heating body is arranged is in communication with the vaporization cavity in an air guiding manner, and the other surface of the porous body opposite to the surface on which the heating body is arranged is in communication with the liquid storage cavity in a liquid guiding manner.
Beneficial effects of the present invention are as follows: The porous body includes a liquid storage advantage layer and a liquid locking advantage layer arranged alternately, which can realize a steeper gradient drop and provide a stronger heat and mass transfer driving force.
To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific implementations of the present invention are described in detail with reference to the accompanying drawings.
The pair of electrodes 30 is electrically connected to the vaporization core 20, and configured to electronically connect the vaporization core 20 to a battery device. It may be understood that the electronic vaporization device 1 is not limited to the shape of a flat column, but may also be in a shape of a cylinder, a square column, or other irregular shapes.
As shown in
As shown in
The porous body 21 is configured to transmit the liquid aerosol-generation substrate in the liquid storage cavity 13 to the heating body 23 by a capillary force. The heating body 23 is arranged on the porous body 21, and configured to generate a high temperature after being energized, to heat and vaporize the liquid aerosol-generation substrate.
In some embodiments, the porous body 21 may be in a shape of a column, which may include a first surface 211, a second surface 213, and a center channel 215. The first surface 211 may be arranged on a bottom end of the porous body 21, and configured to install the heating body 23, to form a vaporization surface. The second surface 213 and the first surface 211 are arranged opposite to each other, and the second surface may be arranged on a top end of the porous body 21, and configured to be in communication with the liquid storage cavity 13 to form a liquid absorbing surface. The center channel 215 is arranged in the porous body 21 and extends from the first surface 211 to the second surface 213, and configured to communicate the vaporization cavity 11 with the air outlet channel 15. It may be understood that, the porous body 21 is not limited to the shape of a column, but may also be in a shape of a flat plate.
In some embodiments, the heating body 23 may be designed in a shape of a circle or a quasi-circle, which is more conducive to a full use of a heating surface. The length of an arc-shaped heating portion may be extended through a surrounding design of the arc-shaped heating portion in a small size, to obtain a higher resistance value. The surrounding design of the arc-shaped heating portion of the heating body 23 may fully gather heat. Combined with the small size brought by the shape of a circle or a quasi-circle, the temperature in the arc-shaped heating portion is further increased to produce more vapor.
In some embodiments, the heating body 23 may include a first heating unit 231, an arc-shaped second heating unit 232, and an arc-shaped third heating unit 233. The first heating unit 231 is arranged on the first surface 211 of the porous body 21 and configured to generate heat in a middle part. The second heating unit 232 and the third heating unit 233 are distributed on two opposite sides of the first heating unit 231 at intervals and symmetrically, and share a circle center with the first heating unit 231 for generating heat on both sides respectively. The second heating unit 232 and the third heating unit 233 are electrically connected to ends on different sides of the first heating unit 231 respectively.
In some embodiments, the vaporization core 20 may be integrally formed by the heating body 23 and the porous body 21 through binder removal and sintering; or the vaporization core may be formed by first preparing the porous body 21 and then preparing the heating body 23 through binder removal and sintering. The shapes of the porous body 21 and the heating body 23 may be not limited.
Referring to
In some embodiments, the second heating unit 232 may include a first heating portion 2321, a second heating portion 2322, and a third heating portion 2323, which are also roughly arc-shaped. The first heating portion 2321, the second heating portion 2322, and the third heating portion 2323 share a circle center with the first heating unit 231 and are arranged in parallel and at intervals in sequence. It may be understood that the number of arc-shaped heating portions of the second heating unit 232 is not limited to three, but may be two or more than three.
The length of at least one arc-shaped heating portion close to the center through hole 2310 in at least two arc-shaped heating portions of the second heating unit 232 is less than the length of at least one arc-shaped heating portion away from the center through hole 2310. In some implementations, the first heating portion 2321, the second heating portion 2322, and the third heating portion 2323 are sequentially away from the center through hole 2310; and the length of the first heating portion 2321 is less than the length of the second heating portion 2322, and the length of the second heating portion 2322 is less than the length of third heating portion 2323. Sequentially increasing lengths can increase a heating area of the heating portions and further increase the amount of vapor.
In some embodiments, the second heating unit 232 may also include three fourth heating portions 2324 that are roughly strip-shaped, two of the three fourth heating portions 2324 electrically connect the first heating portion 2321, the second heating portion 2322, and the third heating portion 2323 in series in sequence, and two ends of the other of the three fourth heating portions 2324 are respectively electrically connected to the first heating unit 231 and the first heating portion 2321.
In some embodiments, the third heating unit 233 may include a fifth heating portion 2331, a sixth heating portion 2332, and a seventh heating portion 2333, which are also roughly arc-shaped. The fifth heating portion 2331, the sixth heating portion 2332, and the seventh heating portion 2333 share a circle center with the first heating unit 231 and are arranged in parallel and at intervals in sequence. It may be understood that the number of arc-shaped heating portions of the third heating unit 233 is not limited to three, but may be two or more than three.
The length of at least one arc-shaped heating portion close to the center through hole 2310 in at least two arc-shaped heating portions of the third heating unit 233 is less than the length of at least one arc-shaped heating portion away from the center through hole 2310. In some implementations, the fifth heating portion 2331, the sixth heating portion 2332, and the seventh heating portion 2333 are sequentially away from the center through hole 2310; and the length of the fifth heating portion 2331 is less than the length of the sixth heating portion 2332, and the length of the sixth heating portion 2332 is less than the length of seventh heating portion 2333. Sequentially increasing lengths can increase a heating area of the heating portions and further increase the amount of vapor.
In some embodiments, the third heating unit 233 may also include three eighth heating portions 2334 that are roughly strip-shaped, two of the three eighth heating portions 2334 electrically connect the fifth heating portion 2331, the sixth heating portion 2332, and the seventh heating portion 2333 in series in sequence, and two ends of the other of the three eighth heating portions 2334 are respectively electrically connected to the first heating unit 231 and the fifth heating portion 2331.
One end of the other of the three fourth heating portions 2324 and one end of the other of the three eighth heating portions 2334 are respectively connected to two opposite sides of the first heating unit 231, so as to electrically connect the second heating unit 232 and the third heating unit 233 to the first heating unit 231.
As shown in
Referring to
In some embodiments, the thickness of the porous body 21 (a distance from the first surface 211 to the second surface 213) may range from 0.8 mm to 3.0 mm, and an average porosity thereof may range from 50% to 75%. The thickness of each unit layer 212 may range from 0.10 mm to 1.5 mm, and the thickness of the liquid locking advantage layer 2123 of each unit layer 212 may range from 10 µm to 200 µm.
It may be understood that, in some embodiments, the unit layers 212 of the porous body 21 are not limited to including both the liquid storage advantage layer 2121 and the liquid locking advantage layer 2123, and part of the unit layers 212 may include either the liquid storage advantage layer 2121 or the liquid locking advantage layer 2123.
As shown in
In some embodiments, a porosity of the liquid storage advantage layer 2121 is 1.2 to 2 times of a porosity of the liquid locking advantage layer 2123. In some embodiments, the porosity of the liquid storage advantage layer 2121 may range from 55% to 90%, and the porosity of the liquid locking advantage layer 2123 may range from 45% to 70%.
In some embodiments, the porous body 21 may be porous alumina ceramic, porous silicon oxide, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite, or composite porous ceramic formed integrally. It may be understood that the porous body 21 is not limited thereto, and may also be made of other materials suitable for flow casting or coating.
In some embodiments, the porous body 21 may be formed by flow casting or extrusion, and specific examples are as follows:
(1) Flow casting process, the flow casting process itself is suitable for preparing a multilayer structure, and for example: (A) green compacts with different porosities may be flow cast first, and then a periodic layered structure may be prepared by periodically stacking and then co-firing the green compacts; and (B) it is also possible to prepare the periodic layered structure by adjusting a recipe by flowing green compacts with different porosities on the upper and lower sides at once according to the difference in density and particle size of each component in the recipe, thus showing the difference in suspension capabilities in the slurry, and then stacking and co-firing the multilayered green compacts.
(2) Using extrusion molding process, a variety of green compacts with different porosities are extruded by recipe adjustment, and then multilayered green compacts were stacked and co-fired to form the periodic layered structure.
(3) Preparing by combination of a variety of processes, for example, a green compact with a porosity is flow casted first, then a green compact with another porosity is extruded or injection molded, and then a variety of green compacts with different porosities are stacked and co-fired periodically to prepare the periodic layered structure.
(4) Using a coating process, an underlying substrate is a high porosity layer, followed by coating performed on the substrate and secondary sintering to form a surface low porosity layer. According to different porosity requirements, the formulation and molding parameters of the porous substrate material may be adjusted artificially to form a required porous substrate structure with hierarchical pores.
As shown in
In some embodiments, according to the test data, when the infiltration ratio of the heating film is higher than 60%, it is easy to encounter a serious e-liquid explosion phenomenon, and when the infiltration ratio is lower than 60%, the e-liquid explosion problem can be significantly alleviated. The following table lists the comparison of the e-liquid explosion test of different types of vaporization cores 20, which also illustrates this point.
For the heating body 23 laid on the small porosity layer (the liquid locking advantage layer 2123), because the pore size of the small porosity layer (the liquid locking advantage layer 2123) is smaller, the amount of infiltration of the heating body 23 is fewer. The heating body 23 mainly infiltrates into the small porosity layer (the liquid locking advantage layer 2123), and the infiltration ratio is lower than 60%, which may avoid a severe e-liquid explosion phenomenon. In addition, the heating body 23 is a porous heating film, which provides a channel for the vaporization air flow, reduces the operating temperature of the heating body 23, further reduces the generation of e-liquid explosion, and improves the reliability of the product.
In some embodiments, the molding of the heating body 23 on the porous body 21 may adopt the following methods:
(1) The porous heating film is prepared by screen printing. The heating film slurry has a certain fluidity, and the slurry may infiltrate into the pores of the porous body 21 during printing. Because the pores of the porous body 21 are not straight through holes, there is a certain degree of tortuosity, and hole walls are not smooth, which has resistance to slippery infiltration, the porous body 21 with a low porosity has a greater viscosity resistance of the hole walls and a lower infiltration degree of the heating film; and in addition, the infiltration amount may be regulated by adjusting the fluidity of the heating film material at a high temperature or the viscosity of the slurry at a low temperature. The thickness of the heating body 23 may range from 15 µm to 150 µm, and the thickness of the part of the heating body 23 that infiltrates into the porous body 21 does not exceed 60% of the thickness of the entire porous body 21. The control of the infiltration amount is mainly to reduce the overheating boiling of the e-liquid in the porous body 21, so as to reduce the heat loss and improve the vaporization efficiency.
(2) The porous heating film is prepared on the porous body 21 by a magnetron sputtering coating process. The thickness of the porous heating film may range from 1 µm to 5 µm, and the heating film material may form a small amount of infiltration in the pores of the porous body 21. Therefore, the infiltration part of the heating film generates less heat in the porous body 21, and the energy utilization rate is high; and a small amount of infiltration provides the physical fit between the heating film and the porous body 21, enhances the bonding force between a film and a base, and improves the reliability of the vaporization core 20.
In some embodiments, the porous body 21a may be in a shape of a column, which may include a first surface 211a, a second surface 213a, and a center channel 215a. The first surface 211a may be arranged on a bottom part of the porous body 21a and configured to install the heating body 23a, to form a vaporization surface. The second surface 213a and the first surface 211a are arranged opposite to each other, and the second surface may be arranged on a top end of the porous body 21a, and configured to be in contact with the liquid aerosol-generation substrate to form a liquid absorbing surface. The center channel 215a is provided in the porous body 21a and extends from the first surface 211a to the second surface 213a, to communicate the vaporization cavity 11 with the air outlet channel 15. It may be understood that, the porous body 21a is not limited to the shape of a column, but may also be in a shape of a flat plate.
In some embodiments, the porous body 21a may include n (2≦n≦30) unit layers 212a, and these unit layers 212a are stacked along a direction from the first surface 211a to the second surface 213a. Each unit layer 212a may include a liquid storage advantage layer 2121a away from the first surface 211a and a liquid locking advantage layer 2123a close to the first surface 211a, so that the liquid storage advantage layer 2121a and the liquid locking advantage layer 2123a of the porous body 21a are alternately arranged, to realize a steeper gradient drop than that of a porous body of the same thickness with a single porosity, so as to provide a stronger heat and mass transfer driving force and provide a faster liquid supplying capability for inhalation.
In some embodiments, the thickness of the porous body 21a (a distance from the first surface 211a to the second surface 213a) may range from 0.8 mm to 3.0 mm, and an average porosity thereof may range from 50% to 75%. The thickness of each unit layer 212a may range from 0.10 mm to 1.5 mm, and the thickness of the liquid locking advantage layer 2123a of each unit layer 212a may range from 10 µm to 200 µm.
In some embodiments, the liquid storage advantage layer 2121a may be a large-pore-size structure layer, and the liquid locking advantage layer 2123a may be a small-pore-size structure layer, where the liquid locking advantage layer 2123a provides the porous body 21a with a stronger support and liquid locking function than the liquid storage advantage layer 2121a; and the liquid storage advantage layer 2121a provides the porous body 21a with functions such us a larger amount of liquid storage, faster liquid supplying, and stronger heat insulation than the liquid locking advantage layer 2123a, so as to reduce heat loss and provide a higher energy utilization rate for the vaporization core 20a.
In some embodiments, an average pore size of the liquid storage advantage layer 2121a is 1.5 to 2.5 times of an average pore size of the liquid locking advantage layer 2123a. In some embodiments, the average pore size of the liquid storage advantage layer 2121a may range from 50 µm to 150 µm, and the average pore size of the liquid locking advantage layer 2123a may range from 20 µm to 100 µm.
In some embodiments, the porous body 21 may be porous alumina ceramic, porous silicon oxide, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite, or composite porous ceramic formed integrally. It may be understood that the porous body 21 is not limited thereto, and may also be made of other materials suitable for flow casting or coating.
In some embodiments, the porous body 21a may be formed by flow casting or extrusion, and specific examples are as follows:
(1) Flow casting process, the flow casting process itself is suitable for preparing a multilayer structure, and for example: (A) green compacts with different pore sizes may be flow cast first, and then a periodic layered structure may be prepared by periodically stacking and then co-firing the green compacts; and (B) it is also possible to prepare the periodic layered structure by adjusting a recipe by flowing green compacts with different pore sizes on different sides at once according to the difference in density and particle size of each component in the recipe, thus showing the difference in suspension capabilities in the slurry, and then stacking and co-firing the multilayered green compacts.
(2) Using extrusion molding process, a variety of green compacts with different pore sizes are extruded by recipe adjustment, and then multilayered green compacts were stacked and co-fired to form the periodic layered structure.
(3) Preparing by combination of a variety of processes, for example, a green compact with a pore size is flow casted first, then a green compact with another pore size is extruded or injection molded, and then a variety of green compacts with different pore sizes are stacked and co-fired periodically to prepare the periodic layered structure.
(4) Using a coating process, an underlying substrate is a large-pore-size structure layer, followed by coating performed on the substrate and secondary sintering to form a small-pore-size structure layer. According to different pore size requirements, the formulation and molding parameters of the porous body material may be adjusted artificially to form a required porous body structure with hierarchical pore sizes.
In some embodiments, the heating body 23a is at least partially exposed to a lowest end of the porous body 21a and the surface of the liquid locking advantage layer 2123a in communication with the vaporization cavity 11 in an air guiding manner, and the structure and molding method of the heating body 23a may be the same as those of the heating body 23, which are not described herein again.
In some embodiments, the porous body 21b may be in a shape of a column, which may include a first surface 211b, a second surface 213b, and a center channel 215b. The first surface 211b is arranged on a bottom part of the porous body 21b and configured to install the heating body 23b, to form a vaporization surface. The second surface 213b and the first surface 211b are arranged opposite to each other on the top end of the porous body 21b, and the second surface is configured to be in contact with the liquid aerosol-generation substrate to form a liquid absorbing surface. The center channel 215b is provided in the porous body 21b and extends from the first surface 211b to the second surface 213b, to communicate the vaporization cavity 11 with the air outlet channel 15. It may be understood that, the porous body 21b is not limited to the shape of a column, but may also be in a shape of a flat plate.
In some embodiments, the porous body 21b may be porous alumina ceramic, porous silicon oxide, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite, or composite porous ceramic formed integrally. However, the porous body is not limited thereto, and may also be other materials suitable for flow casting or coating. The thickness of the porous body 21b may range from 0.8 mm to 3.0 mm, and an average porosity thereof may range from 50% to 75%. In some embodiments, the porous body 21b may be a periodic layered structure, which may include n (2≤n≤30) unit layers 212b, where the thickness of each unit layer 212b may range from 0.1 mm to 1.5 mm, and each unit layer 212b may include a liquid storage advantage layer 2121b close to the first surface 211b and a liquid locking advantage layer 2123b away from the first surface 211b, which are configured to reduce a liquid supplying path, to provide a faster liquid supplying capability for inhalation. In some embodiments, the thickness of the liquid locking advantage layer 2123b may range from 10 µm to 200 µm.
In some embodiments, the liquid storage advantage layer 2121b may be a large-pore-size structure layer, and the liquid locking advantage layer 2123b may be a small-pore-size structure layer, where the liquid locking advantage layer 2123b provides the porous body 21b with a stronger support and liquid locking function than the liquid storage advantage layer 2121b; and the liquid storage advantage layer 2121b provides the porous body 21b with functions such us a larger amount of liquid storage, faster liquid supplying, and stronger heat insulation than the liquid locking advantage layer 2123b, so as to reduce heat loss and provide a higher energy utilization rate for the vaporization core 20b. In some embodiments, an average pore size of the liquid storage advantage layer 2121b is 1.5 to 2.5 times of an average pore size of the liquid locking advantage layer 2123b.
In some embodiments, under the condition of the same thickness, a gradient drop of a porous body with a uniform pore size is flat, and a porous body 21b of a periodic n-layered (n is more than or equal to 2) structure can realize a steeper gradient drop, to provide a stronger heat and mass transfer driving force.
As shown in
In some embodiments, the porous body 21c may be in a shape of a column, which may include a first surface 211c, a second surface 213c, and a center channel 215c. The first surface 211c is arranged on a bottom part of the porous body 21c and configured to install the heating body 23c, to form a vaporization surface. The second surface 213c and the first surface 211c are arranged opposite to each other on the top end of the porous body 21c, and the second surface is configured to be in contact with the liquid aerosol-generation substrate to form a liquid absorbing surface. The center channel 215c is arranged in the porous body 21c and extends from the first surface 211c to the second surface 213c, to communicate the vaporization cavity 11 with the air outlet channel 15. It may be understood that, the porous body 21c is not limited to the shape of a column, but may also be in a shape of a flat plate.
In some embodiments, the porous body 21c may be porous alumina ceramic, porous silicon oxide, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite, or composite porous ceramic formed integrally. However, the porous body not limited thereto, and may also be other materials suitable for flow casting or coating. The thickness of the porous body 21c may range from 0.8 mm to 3.0 mm, and an average porosity thereof may range from 50% to 75%. In some embodiments, the porous body 21c may be a periodic layered structure, which may include n (2≤n≤30) unit layers 212c, where the thickness of each unit layer 212c may range from 0.10 mm to 1.5 mm, and each unit layer 212c may include a liquid storage advantage layer 2121c close to the first surface 211c and a liquid locking advantage layer 2123c away from the first surface 211c, which are configured to reduce a liquid supplying path, to provide a faster liquid supplying capability for inhalation. In some embodiments, the thickness of the liquid locking advantage layer 2123 may range from 10 µm to 200 µm.
In some embodiments, the liquid storage advantage layer 2121c may be a high porosity layer, and the liquid locking advantage layer 2123c may be a low porosity layer, where the liquid locking advantage layer 2123c provides the porous body 21c with a stronger support and liquid locking function than the liquid storage advantage layer 2121c; and the liquid storage advantage layer 2121c provides the porous body 21c with functions such us a larger amount of liquid storage, faster liquid supplying, and stronger heat insulation than the liquid locking advantage layer 2123c, so as to reduce heat loss and provide a higher energy utilization rate for the vaporization core 20c. In some embodiments, a porosity of the liquid storage advantage layer 2121c is 1.2 to 2 times of a porosity of the liquid locking advantage layer 2123c. Specifically, the porosity of the liquid storage advantage layer 2121c may range from 55% to 90%, and the porosity of the liquid locking advantage layer 2123c may range from 45% to 70%. In some embodiments, under the condition of the same thickness, a gradient drop of a porous body with a uniform porosity is flat, and a porous body of a periodic n-layered (n is greater than or equal to 2) structure can realize a steeper gradient drop, to provide a stronger heat and mass transfer driving force.
As shown in
It should be noted that, although the heating body in the above embodiments is formed by a porous heating film, in some other embodiments, the heating body is not limited thereto, and other heating bodies such as a metal heating sheet or a non-porous heating film are also applicable.
The foregoing descriptions are embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent structure or process changes made according to the content of this specification and accompanying drawings in the present invention or by directly or indirectly applying the present invention in other related technical fields shall fall within the protection scope of the present invention.
While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments.
The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202210336213.6 | Mar 2022 | CN | national |
