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CN-121989543-A - Vacuum insulation board, preparation method thereof and refrigeration equipment

CN121989543ACN 121989543 ACN121989543 ACN 121989543ACN-121989543-A

Abstract

The application provides a vacuum insulation board, a preparation method thereof and refrigeration equipment. The vacuum insulation board comprises a first membrane material, a second membrane material and a plurality of supporting core materials, wherein the first membrane material and the second membrane material are oppositely arranged, the first membrane material is provided with a plurality of first grooves which are sunken towards the direction far away from the second membrane material, the second membrane material is in sealing connection with the peripheries of the plurality of first grooves to form a plurality of vacuum cavities, each vacuum cavity is internally provided with the supporting core materials, and two opposite ends of the supporting core materials are respectively abutted against the first membrane material and the second membrane material. The vacuum heat-insulating plate provided by the application can eliminate gas convection heat transfer and gas heat transfer, so that the heat conductivity coefficient of the vacuum heat-insulating plate is reduced, and the heat-insulating performance of the vacuum heat-insulating plate is effectively improved.

Inventors

  • ZHANG SHIQIAN
  • YANG KUN
  • WANG HAICHAO

Assignees

  • TCL家用电器（合肥）有限公司

Dates

Publication Date
20260508
Application Date
20260323

Claims (19)

  1. 1. The vacuum insulation board is characterized in that the vacuum insulation board (100) comprises a first membrane material (110), a second membrane material (120) and a plurality of support core materials (130), wherein the first membrane material (110) and the second membrane material (120) are oppositely arranged; The first membrane material (110) is provided with a plurality of first grooves (111) which are recessed towards a direction far away from the second membrane material (120), the second membrane material (120) is in sealing connection with the peripheral edges (112) of the plurality of first grooves (111) to form a plurality of vacuum cavities, each vacuum cavity is internally provided with a supporting core material (130), and two opposite ends of the supporting core material (130) are respectively abutted against the first membrane material (110) and the second membrane material (120).
  2. 2. The vacuum insulation panel according to claim 1, wherein the second film (120) is provided with a plurality of second grooves (121) recessed in a direction away from the first film (110), and the plurality of second grooves (121) and the plurality of first grooves (111) are surrounded in one-to-one correspondence to form a plurality of vacuum chambers.
  3. 3. Vacuum insulation panel according to claim 1, characterized in that the sealing connection between the second film (120) and the peripheral edges (112) of the plurality of first grooves (111) is a hot melt connection.
  4. 4. The vacuum insulation panel as claimed in claim 1, wherein the support core (130) has opposite first and second faces, the first face abutting against a face of the first film (110) facing the second film (120), the second face abutting against a face of the second film (120) facing the first film (110).
  5. 5. The vacuum insulation panel as recited in claim 1, wherein the support core (130) comprises silica aerogel powder and chopped carbon fibers.
  6. 6. The vacuum insulation panel according to claim 5, wherein the mass ratio of the silica aerogel powder to the chopped carbon fibers is (90-97) to (3-10); And/or the particle size of the silicon dioxide aerogel powder is 10-50 mu m; And/or the length of the chopped carbon fiber is 0.5 mm-1 mm.
  7. 7. The vacuum insulation panel as claimed in claim 1, wherein the support core (130) comprises hollow rigid microbeads.
  8. 8. The vacuum insulation panel of claim 7, wherein the hollow rigid microbeads have a wall thickness of 1-2 μm and a particle size of 30-100 μm; And/or the hollow rigid microbeads are one or more of hollow glass microbeads, hollow ceramic microbeads, hollow carbonaceous microbeads and hollow metal microbeads.
  9. 9. The vacuum insulation panel of claim 7, wherein the outer surface of the hollow rigid microbeads is coated with a nano-film, the nano-film being a zirconium dioxide nano-film, a silicon dioxide nano-film, an aluminum oxide nano-film or a titanium oxide nano-film.
  10. 10. The vacuum insulation panel of claim 9, wherein the thickness of the nano-film is 10 nm-30 nm; and/or the nano film is coated on the outer surface of the hollow rigid microbead by a sol-gel method.
  11. 11. Vacuum insulation panel according to claim 1, characterized in that the surface of the support core (130) is provided with a reflective layer.
  12. 12. The vacuum insulation panel of claim 11, wherein the reflective layer has a thickness of 100nm to 200nm; And/or the reflecting layer is made of aluminum, silver or aluminum-silver alloy.
  13. 13. The vacuum insulation panel according to any one of claims 1 to 12, wherein the first film material (110) and the second film material (120) each include a protective layer, a barrier layer and a sealing layer which are sequentially stacked, and the sealing layer of the first film material (110) and the sealing layer of the second film material (120) are disposed opposite to each other and are in sealing connection; And/or, the vacuum insulation board (100) further comprises a getter (140), and the getter (140) is arranged in the vacuum cavity.
  14. 14. The preparation method of the vacuum insulation board is characterized by comprising the following steps of: S100, providing a first film material (110), a second film material (120) and a plurality of support core materials (130); s200, processing and forming a plurality of first grooves (111) on the first film material (110); S300, respectively placing a plurality of support core materials (130) in a plurality of first grooves (111); S400, placing the second film material (120) on the first film material (110), and enabling the notch of the plurality of first grooves (111) to be completely covered by the second film material (120), wherein the second film material (120) and the plurality of first grooves (111) are enclosed to form a plurality of accommodating cavities; S500, sealing and connecting part of the peripheral edges (112) of the first grooves (111) with the second film material (120), and forming an extraction opening between the other part of the peripheral edges (112) of the first grooves (111) and the second film material (120); And S600, vacuumizing the accommodating cavity, and then sealing the air extraction opening to enable the accommodating cavity to form a vacuum cavity, so that the vacuum insulation board (100) is obtained.
  15. 15. The method for manufacturing a vacuum insulation panel according to claim 14, wherein the step S200 further comprises forming a plurality of second grooves (121) on the second film (120); The step S400 includes placing the second film material (120) on the first film material (110), and completely covering the notches of the plurality of first grooves (111) by the second film material (120), wherein the plurality of first grooves (111) and the plurality of second grooves (121) enclose a plurality of accommodating cavities.
  16. 16. The method for manufacturing a vacuum insulation panel according to claim 14, wherein the support core material (130) is manufactured by mixing silica aerogel powder, chopped carbon fibers and a first binder, and forming the support core material (130) by a freeze-drying method; Or the support core material (130) is prepared by coating a nano film on the surface of the hollow rigid microbead by a sol-gel method, wherein the nano film is a zirconium dioxide nano film, a silicon dioxide nano film, an aluminum oxide nano film or a titanium oxide nano film, mixing the hollow rigid microbead coated with the nano film with a second adhesive, and then pressing and forming in a mould to obtain the support core material (130).
  17. 17. The method of manufacturing a vacuum insulation panel according to claim 14, further comprising providing a reflective layer on a surface of the support core (130) before placing the support core (130) in the first groove (111); and/or, the step S300 further comprises placing a getter (140) in each of the plurality of first grooves (111).
  18. 18. A refrigeration device, characterized in that the refrigeration device comprises an insulation layer comprising the vacuum insulation panel (100) according to any one of claims 1 to 13, or the insulation layer comprises the vacuum insulation panel (100) produced by the method for producing a vacuum insulation panel according to any one of claims 14 to 17.
  19. 19. The refrigeration appliance of claim 18 wherein said insulating layer comprises a plurality of said vacuum insulation panels (100), said plurality of vacuum insulation panels (100) being joined together by a snap-fit arrangement.

Description

Vacuum insulation board, preparation method thereof and refrigeration equipment Technical Field The application belongs to the technical field of heat preservation, and particularly relates to a vacuum heat-preservation plate, a preparation method thereof and refrigeration equipment. Background At present, the heat insulation layer of the refrigeration equipment mainly adopts hard polyurethane foam, and the hard polyurethane foam has low heat conduction performance and can realize better heat insulation effect. However, the heat conductivity coefficient of the existing rigid polyurethane foam is close to the theoretical limit, and the heat insulation performance is difficult to further improve, so that the energy efficiency breakthrough of the refrigeration equipment is restricted. Therefore, it is desirable to provide a thermal insulation material with better thermal insulation performance. Disclosure of Invention The embodiment of the application provides a vacuum insulation board, a preparation method thereof and refrigeration equipment, which are used for solving the problem that the heat insulation performance of the existing insulation material is to be improved. In a first aspect, an embodiment of the present application provides a vacuum insulation board, where the vacuum insulation board includes a first film material, a second film material and a plurality of support core materials, the first film material and the second film material are disposed opposite to each other, the first film material is provided with a plurality of first grooves recessed toward a direction away from the second film material, the second film material is connected with peripheries of the plurality of first grooves in a sealing manner to form a plurality of vacuum chambers, each vacuum chamber is provided with the support core material, and two opposite ends of the support core material respectively abut against the first film material and the second film material. Optionally, the second membrane material is provided with a plurality of second grooves recessed towards a direction far away from the first membrane material, and the second grooves and the first grooves are correspondingly enclosed into a plurality of vacuum cavities. Optionally, the sealing connection mode between the second film material and the peripheral edges of the plurality of first grooves is hot melt connection. Optionally, the support core has a first face and a second face opposite to each other, the first face abuts against a face of the first film material facing the second film material, and the second face abuts against a face of the second film material facing the first film material. Optionally, the support core comprises silica aerogel powder and chopped carbon fibers. Optionally, the mass ratio of the silica aerogel powder to the chopped carbon fibers is (90-97) to (3-10), and/or the particle size of the silica aerogel powder is 10-50 μm, and/or the length of the chopped carbon fibers is 0.5-1 mm. Optionally, the support core comprises hollow rigid microbeads. Optionally, the hollow rigid microbeads have a wall thickness of 1-2 μm and a particle diameter of 30-100 μm, and/or are one or more of hollow glass microbeads, hollow ceramic microbeads, hollow carbonaceous microbeads and hollow metal microbeads. Optionally, the outer surface of the hollow rigid microbead is coated with a nano film, and the nano film is a zirconium dioxide nano film, a silicon dioxide nano film, an aluminum oxide nano film or a titanium oxide nano film. Optionally, the thickness of the nano film is 10 nm-30 nm, and/or the nano film is coated on the outer surface of the hollow rigid microbead by a sol-gel method. Optionally, a reflective layer is provided on the surface of the support core. Optionally, the thickness of the reflecting layer is 100 nm-200 nm, and/or the reflecting layer is made of aluminum, silver or aluminum-silver alloy. Optionally, the first film material and the second film material each comprise a protective layer, a barrier layer and a sealing layer which are sequentially laminated, the sealing layer of the first film material and the sealing layer of the second film material are oppositely arranged and are in sealing connection, and/or the vacuum insulation plate further comprises a getter, and the getter is arranged in the vacuum cavity. In a second aspect, an embodiment of the present application provides a method for manufacturing a vacuum insulation board, the method for manufacturing the insulation board including the steps of: S100, providing a first membrane material, a second membrane material and a plurality of support core materials; S200, processing a plurality of first grooves on the first film material; S300, respectively placing a plurality of support core materials in a plurality of first grooves; S400, placing the second film material on the first film material, and enabling the notch of the plurality of first grooves to be complet