Search

EP-4741366-A2 - ELECTRONIC VAPORIZATION DEVICE AND VAPORIZATION CORE THEREOF, POROUS BODY, AND MANUFACTURING METHOD OF POROUS BODY

EP4741366A2EP 4741366 A2EP4741366 A2EP 4741366A2EP-4741366-A2

Abstract

The present invention relates to an electronic vaporization device and a vaporization core thereof, a porous body, and a manufacturing method of the porous body, where the porous body includes a first surface, a second surface opposite to the first surface, and at least two unit layers sequentially arranged along a direction from the first surface to the second surface, one of the at least two unit layers includes at least a liquid storage advantage layer or a liquid locking advantage layer, and each of the other unit layers of the at least two unit layers includes a liquid storage advantage layer and a liquid locking advantage layer combined with the liquid storage advantage layer. The liquid storage advantage layer comprises a high porosity layer and the liquid locking advantage layer comprises a low porosity layer. The liquid storage advantage layers and the liquid locking advantage layers of the at least two unit layers are alternately combined along the direction from the first surface to the second surface. 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.

Inventors

  • CHEN, FENG
  • LI, BO
  • ZHANG, YAOHUA
  • LONG, Jicai
  • CHEN, BING
  • ZHOU, HONGMING

Assignees

  • Hainan Moore Brothers Technology Co., Ltd.

Dates

Publication Date
20260513
Application Date
20230317

Claims (15)

  1. A porous body (21, 21a, 21b, 21c) for an electronic vaporization device (1), comprising: a first surface (211, 211a, 211b, 211c); a second surface (213, 213a, 213b, 213c) opposite to the first surface (211, 211a, 211b, 211c); and at least two unit layers (212, 212a, 212b, 212c) sequentially arranged along the direction from the first surface (211, 211a, 211b, 211c) to the second surface (213, 213a, 213b, 213c), wherein one unit layer (212, 212a, 212b, 212c) of the at least two unit layers (212, 212a, 212b, 212c) comprises at least a liquid storage advantage layer (2121, 2121a, 2121b, 2121c) or a liquid locking advantage layer (2123, 2123a, 2123b, 2123c), and wherein each other unit layer (212, 212a, 212b, 212c) of the at least two unit layers (212, 212a, 212b, 212c) comprises the liquid storage advantage layer (2121, 2121a, 2121b, 2121c) and the liquid locking advantage layer (2123, 2123a, 2123b, 2123c) combined with the liquid storage advantage layer (2121, 2121a, 2121b, 2121c), wherein the liquid storage advantage layer (2121, 2121a, 2121b, 2121c) comprises a high porosity layer, wherein the liquid locking advantage layer (2123, 2123a, 2123b, 2123c) comprises a low porosity layer, and wherein the liquid storage advantage layers (2121, 2121a, 2121b, 2121c) and the liquid locking advantage layers (2123, 2123a, 2123b, 2123c) of the at least two unit layers (212, 212a, 212b, 212c) are alternately combined along the direction from the first surface (211, 211a, 211b, 211c) to the second surface (213, 213a, 213b, 213c).
  2. The porous body (21, 21a, 21b, 21c) of claim 1, wherein each unit layer (212, 212a, 212b, 212c) of the at least two unit layers (212, 212a, 212b, 212c) comprises the liquid storage advantage layer (2121, 2121a, 2121b, 2121c) and the liquid locking advantage layer (2123, 2123a, 2123b, 2123c) combined with the liquid storage advantage layer (2121, 2121a, 2121b, 2121c).
  3. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the thickness of the liquid locking advantage layer (2123, 2123a, 2123b, 2123c) ranges from 10 µm to 200 µm.
  4. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the thickness of the porous body (21, 21a, 21b, 21c) ranges from 0.8 mm to 3.0 mm.
  5. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the average porosity of the porous body (21, 21a, 21b, 21c) ranges from 50% to 75%.
  6. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the thickness of each unit layer (212, 212a, 212b, 212c) ranges from 0.1 mm to 1.5 mm.
  7. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the liquid storage advantage layer (2121, 2121a, 2121b, 2121c) comprises a large-pore-size structure layer, wherein the liquid locking advantage layer (2123, 2123a, 2123b, 2123c) comprises a small-pore-size structure layer, and wherein the average pore size of the large-pore-size structure layer is 1.5 to 2.5 times of the average pore size of the small-pore-size structure layer.
  8. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the liquid storage advantage layer (2121, 2121a, 2121b, 2121c) comprises a large-pore-size structure layer, wherein the liquid locking advantage layer (2123, 2123a, 2123b, 2123c) comprises a small-pore-size structure layer, wherein the average pore size of the large-pore-size structure layer ranges from 50 µm to 150 µm, and wherein the average pore size of the small-pore-size structure layer ranges from 20 µm to 100 µm.
  9. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the porosity of the high porosity layer is 1.2 to 2 times of the porosity of the low porosity layer.
  10. The porous body (21, 21a, 21b, 21c) of claim 1, wherein the porosity of the high porosity layer ranges from 55% to 90%, and wherein the porosity of the low porosity layer ranges from 45% to 70%.
  11. A manufacturing method of the porous body (21, 21a, 21b, 21c) of any one of claims 1 to 10, comprising: providing at least two pairs of green compacts with different porosities or different pore sizes; stacking the at least two pairs of green compacts alternately to form a green compact assembly; and co-firing the green compact assembly to form the porous body (21, 21a, 21b, 21c) that is integrated.
  12. The manufacturing method of claim 11, wherein the at least two pairs of green compacts are formed by flow casting or extrusion.
  13. The manufacturing method of claim 11, wherein at least some of the at least two pairs of green compacts are formed by flow casting, and at least some of the at least two pairs of green compacts are formed by extrusion or injection molding.
  14. A vaporization core (20, 20a, 20b, 20c) for an electronic vaporization device (1), comprising: a heating body (23, 23a, 23b, 23c); and the porous body (21, 21a, 21b, 21c) of any one of claims 1 to 10, wherein the heating body (23, 23a, 23b, 23c) is arranged on the first surface (211, 211a, 211b, 211c) of the porous body (21, 21a, 21b, 21c).
  15. An electronic vaporization device (1), comprising: a liquid storage cavity (13); a vaporization cavity (11); and the vaporization core (20, 20a, 20b, 20c) of claim 14, wherein the surface of the porous body (21, 21a, 21b, 21c) on which the heating body (23, 23a, 23b, 23c) is arranged is in communication with the vaporization cavity (11) in an air guiding manner, and wherein the other surface of the porous body (21, 21a, 21b, 21c) opposite to the surface on which the heating body (23, 23a, 23b, 23c) is arranged is in communication with the liquid storage cavity (13) in a liquid guiding manner.

Description

FIELD 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. BACKGROUND 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. SUMMARY The technical problems to be resolved in the present invention is to provide an improved electronic vaporization device and a vaporization core thereof, a porous body, and a manufacturing method of the porous body. The invention is set out in the appended set of claims. To resolve the foregoing technical problems, the present invention provides a porous body for an electronic vaporization device, wherein the porous body includes a first surface, a second surface opposite the first surface, and at least two unit layers stacked arranged along the 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 another one of the at least two unit layers includes at least the liquid storage advantage layer or the liquid locking advantage layer. Each unit layer of the at least two unit layers includes the liquid storage advantage layer and the 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, the 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 the average pore size of the large-pore-size structure layer is 1.5 to 2.5 times of the 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, the average pore size of the large-pore-size structure layer ranges from 50 µm to 150 µm, and the 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 the porosity of the high porosity layer is 1.2 to 2 times of the 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, the porosity of the high porosity layer ranges from 55% to 90%, and the porosity of the low porosity layer ranges from 45% to 70%. 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 is provided, including the following steps: (A) providing at least two pairs of green compacts with different porosities or different pore sizes;(B) stacking the at least two pairs of green compacts alternately to form a green compact assembly; and(C) co-firing the green compact assembly. 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), some of the green compacts are formed by flow casting, and some 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, wherein the heating body is arran