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CN-121993695-A - Thermal insulation material, preparation method thereof and household appliance

CN121993695ACN 121993695 ACN121993695 ACN 121993695ACN-121993695-A

Abstract

The invention provides a heat insulation material, a preparation method thereof and a household appliance. The thermal insulation material comprises a hard shell and dispersed organic fibers, wherein the organic fibers are filled into the hard shell. According to the technical scheme provided by the invention, the hard shell can provide high-strength internal and external support for the heat insulation material, and the dispersed organic fibers are used as filling core materials in the shell, so that the heat insulation material with the high strength and the low heat conduction effect can be obtained through filling the organic fibers into the high-strength hard shell, and the low heat conduction effect is realized.

Inventors

  • JU JIANZHU
  • LI CHANGXI
  • ZHAO JINGYUN

Assignees

  • 合肥华凌股份有限公司
  • 合肥美的电冰箱有限公司
  • 美的集团股份有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (17)

  1. 1. A thermal insulation material, comprising: Hard shell body And (3) filling the dispersed organic fibers into the hard shell.
  2. 2. The insulation material of claim 1, wherein the hard shell has a hardness greater than 60HB.
  3. 3. The insulating material of claim 2, wherein the material of the rigid shell comprises a metallic material or a polymeric material.
  4. 4. The thermal insulation material according to claim 3, wherein the polymer material comprises at least one of a resin, an acrylonitrile-butadiene-styrene copolymer, and polytetrafluoroethylene, or The metallic material comprises a single metal or a metal alloy.
  5. 5. The insulation material of claim 1, wherein the organic fibers comprise at least one of polypropylene fibers, polyethylene terephthalate fibers, and polyacrylonitrile fibers.
  6. 6. The thermal insulation material according to claim 1, wherein the length of the organic fiber is 1mm to 150mm, and/or, The fineness of the organic fibers is 0.1D-3D.
  7. 7. The insulation material of claim 1, wherein the inner cavity of the rigid housing is sealed, and the pressure in the rigid housing is 0.1pa to 12pa.
  8. 8. The insulation material of claim 1, wherein the dispersed organic fibers have a moisture content of 0 to 0.6%.
  9. 9. The insulating material of claim 1, further comprising two seals, the rigid housing having a first opening and a second opening communicating with an interior cavity thereof, the two seals being disposed in the first opening and the second opening, respectively, to seal the interior cavity of the rigid housing.
  10. 10. A method for producing the thermal insulation material according to any one of claims 1 to 9, comprising the steps of: Providing a hard shell and an organic fiber suspension, wherein the hard shell is provided with a first opening and a second opening which are communicated with an inner cavity of the hard shell in the up-down direction, the first opening is arranged above the second opening, a filtering structure is arranged at the second opening, the size of a filtering hole of the filtering structure is smaller than that of the organic fiber, and the organic fiber suspension comprises the organic fiber and a liquid medium; And (3) introducing the organic fiber suspension into the inner cavity from the first opening, filtering by the filtering structure, and flowing out of the second opening by the liquid medium so as to fill the organic fibers into the hard shell to form the heat insulation material.
  11. 11. The method for producing a heat insulating material according to claim 10, wherein the mass percentage of the organic fibers in the organic fiber suspension is 0.05% to 0.5%.
  12. 12. The method of claim 10, wherein the step of introducing an organic fiber suspension into the cavity from the first opening, filtering the organic fiber suspension by the filter structure, and flowing the liquid medium out of the second opening to fill the organic fibers into the rigid housing, the step of forming the thermal insulation material comprising: introducing the organic fiber suspension into the inner cavity from the first opening, filtering by the filtering structure, and flowing out of the second opening by the liquid medium to fill the organic fibers into the hard shell; And after filling, vacuumizing the hard shell, and sealing the first opening and the second opening to form the heat insulation material.
  13. 13. The method of claim 12, wherein the step of filling the organic fiber suspension into the hard shell by passing the organic fiber suspension from the first opening into the cavity, filtering the organic fiber suspension by the filter structure, and flowing the liquid medium out of the second opening comprises: Gradually filling, namely introducing part of the organic fiber suspension into the inner cavity from the first opening, filtering by the filtering structure, and enabling a liquid medium to flow out of the second opening; step-by-step drying, namely introducing gas from the first opening to dry the organic fibers in the hard shell; and circularly repeating the step-by-step filling step and the step-by-step drying step until the organic fibers in the whole organic fiber suspension are filled into the hard shell.
  14. 14. The method of claim 12, wherein the step of sealing the first opening and the second opening after the hard case is vacuumized after the filling is completed to form the thermal insulation material comprises: after filling is completed, introducing gas to inflate the organic fibers in the hard shell; And after the inflation is completed, vacuumizing the hard shell, and sealing the first opening and the second opening to form the heat insulation material.
  15. 15. The method for producing a heat insulating material according to claim 13 or 14, wherein the temperature of the gas is 70 ℃ to 200 ℃ and/or, The pressure of the gas is 0.3-0.9 MPa.
  16. 16. A household appliance comprising a thermal insulation material according to any one of claims 1 to 9.
  17. 17. The household appliance of claim 16, wherein the household appliance comprises at least one of a refrigerator, a water heater, and an air conditioner.

Description

Thermal insulation material, preparation method thereof and household appliance Technical Field The invention relates to the technical field of heat preservation materials, in particular to a heat preservation material, a preparation method thereof and a household appliance. Background The existing structure of the low-heat-conductivity heat-insulating material generally uses a micro-nano composite structure as a filling material, and often the core material is prepared by laminating the micro-nano composite structure, and then the core material is packaged by a film bag made of a film material made of a high polymer material. And vacuumizing the film bag, and sealing at high temperature by utilizing a polyethylene adhesive layer to prepare the vacuum heat-insulating material with the micropore structure. However, the heat insulation material with the structure has lower strength, cannot be directly used as a structural member in a final product, and needs to be compounded with a polyurethane hard foam material and a rigid structural member to improve the processing strength and the forming capability, so that a structural heat bridge is difficult to avoid, the comprehensive heat conductivity coefficient of the heat insulation material is increased, and the heat insulation performance of the product is reduced. Meanwhile, the thickness and the size of the heat-insulating structure are controlled by the comprehensive strength and the air pressure of the core material, so that accurate design cannot be performed, and the structural member design difficulty is improved. At present, a process for manufacturing a heat-insulating structure by pouring a powdery micro-nano structure into a cavity of a sealing element is available, so that the processing difficulty can be reduced and the heat bridge effect can be reduced. But the thermal insulation material made of the powdery micro-nano structure has higher thermal conductivity coefficient, and is difficult to meet the thermal insulation requirement. In a comprehensive view, the existing heat insulation material capable of being directly used has the problem of high heat conductivity coefficient. Disclosure of Invention The invention mainly aims to provide a heat insulation material, a preparation method thereof and a household appliance, and aims to solve the problem that the heat insulation material which can be directly used in the prior art is high in heat conductivity coefficient. In order to achieve the above object, the present invention provides a thermal insulation material, comprising: Hard shell body And (3) filling the dispersed organic fibers into the hard shell. In one embodiment, the hard shell has a hardness greater than 60HB. In one embodiment, the material of the hard shell comprises a metallic material or a polymeric material. In one embodiment, the polymeric material comprises at least one of a resin, an acrylonitrile-butadiene-styrene copolymer, and polytetrafluoroethylene, or The metallic material comprises a single metal or a metal alloy. In one embodiment, the organic fibers include at least one of polypropylene fibers, polyethylene terephthalate fibers, and polyacrylonitrile fibers. In one embodiment, the organic fibers have a length of 1mm to 150mm, and/or, The fineness of the organic fibers is 0.1D-3D. In an embodiment, the inner cavity of the hard shell is sealed, and the pressure in the hard shell is 0.1 Pa-12 Pa. In one embodiment, the dispersed organic fibers have a moisture content of 0 to 0.6%. In an embodiment, the heat insulation material further includes two sealing members, the hard shell has a first opening and a second opening which are communicated with the inner cavity of the hard shell, and the two sealing members are respectively arranged at the first opening and the second opening so as to seal the inner cavity of the hard shell. The invention also provides a preparation method of the heat insulation material, which comprises the following steps: Providing a hard shell and an organic fiber suspension, wherein the hard shell is provided with a first opening and a second opening which are communicated with an inner cavity of the hard shell in the up-down direction, the first opening is arranged above the second opening, a filtering structure is arranged at the second opening, the size of a filtering hole of the filtering structure is smaller than that of the organic fiber, and the organic fiber suspension comprises the organic fiber and a liquid medium; And (3) introducing the organic fiber suspension into the inner cavity from the first opening, filtering by the filtering structure, and flowing out of the second opening by the liquid medium so as to fill the organic fibers into the hard shell to form the heat insulation material. In an embodiment, the mass percentage of the organic fiber in the organic fiber suspension is 0.05% -0.5%. In one embodiment, the step of introducing the organic fiber suspension into the inner ca