CN-121989458-A - Method for preparing heat insulation material by dry method, heat insulation material and household appliance

Abstract

The invention provides a method for preparing a heat insulation material by a dry method, the heat insulation material and a household appliance, and relates to the field of heat insulation materials. The method for preparing the heat insulation material by the dry method comprises the steps of providing a hard shell, filling dispersed organic fibers into the hard shell from the first opening in a blowing mode to form the heat insulation material, wherein the hard shell is provided with a first opening and a second opening which are communicated with the inner cavity of the hard shell. According to the technical scheme, the hard shell can provide high-strength internal and external support for the heat insulation material, dispersed organic fibers are filled into the hard shell, the heat insulation material has the advantages of low heat conduction, easiness in processing and environment protection, final dryness can be guaranteed when the organic fibers are in a dry state in the processing process through an air blowing mode, processing efficiency is improved, in addition, no additional dispersing agent is needed, damage of the dispersing agent to the organic fibers can be avoided, and the quality of the heat insulation material is improved.

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 (16)

1. 1. A method for preparing a heat insulating material by a dry method, comprising the steps of: Providing a hard shell, wherein the hard shell is provided with a first opening and a second opening which are communicated with the inner cavity of the hard shell; And filling the dispersed organic fibers into the hard shell from the first opening by blowing so as to form the heat insulation material.
2. 2. The method of claim 1, wherein the step of providing a rigid housing having a first opening and a second opening communicating with the interior cavity thereof, the rigid housing has a hardness greater than 60HB.
3. 3. The method of preparing a thermal insulation material according to claim 2, wherein the material of the hard shell comprises a metallic material or a polymeric material.
4. 4. The method for producing a heat insulating 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 method of preparing a thermal insulation material according to claim 1, wherein the step of filling the dispersed organic fibers from the first opening into the hard shell by blowing to form the thermal insulation material comprises: filling the dispersed organic fibers into the hard shell from the first opening in a blowing mode; And after filling, vacuumizing the hard shell, and sealing the first opening and the second opening to form the heat insulation material.
6. 6. The method of preparing a thermal insulation material according to claim 5, 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 from the first opening or the second opening to inflate the organic fibers dispersed in the hard shell; And after the air inflation is completed, vacuumizing the hard shell, and sealing the first opening and the second opening to form the heat insulation material.
7. 7. The method of preparing a thermal insulation material according to claim 1, wherein the step of filling the dispersed organic fibers from the first opening into the hard shell by blowing to form the thermal insulation material is preceded by the steps of: and scattering the bundled organic fibers by a blowing mode, and filtering to obtain the dispersed organic fibers.
8. 8. The method for preparing a heat insulating material according to any one of claims 5 to 7, wherein the blowing method comprises introducing a gas into the hard casing: the temperature of the gas is 70-200 ℃, and/or, The pressure of the gas is 0.3-0.9 MPa.
9. 9. The method of preparing a heat insulating material according to claim 5, wherein after the hard casing is vacuumized after the filling is completed, the first opening and the second opening are sealed to form a heat insulating material, wherein: the pressure in the inner cavity of the hard shell is 0.1 Pa-12 Pa.
10. 10. The method for preparing a heat insulating material according to claim 1, wherein the step of filling the dispersed organic fibers from the first opening into the hard shell by blowing to form the heat insulating material comprises the steps of: the organic fiber comprises at least one of polypropylene fiber, polyethylene terephthalate fiber, polyacrylonitrile fiber and polyvinyl alcohol fiber.
11. 11. The method for preparing a heat insulating material according to claim 1, wherein the step of filling the dispersed organic fibers from the first opening into the hard shell by blowing to form the heat insulating material comprises the steps of: the length of the organic fiber is 1 mm-150 mm.
12. 12. The method for preparing a heat insulating material according to claim 1, wherein the step of filling the dispersed organic fibers from the first opening into the hard shell by blowing to form the heat insulating material comprises the steps of: The fineness of the organic fibers is 0.1D-3D.
13. 13. The method for preparing a heat insulating material according to claim 1, wherein in the step of filling the dispersed organic fibers from the first opening into the hard shell by blowing to form a heat insulating material: the water content of the organic fibers in the heat insulation material is 0-0.6%.
14. 14. A thermal insulation material, characterized in that it is produced by the method for producing a thermal insulation material according to any one of claims 1 to 13 by dry method.
15. 15. A household appliance comprising the insulating material of claim 14.
16. 16. The household appliance of claim 15, wherein the household appliance comprises at least one of a refrigerator, a water heater, and an air conditioner.

Description

Method for preparing heat insulation material by dry method, heat insulation material and household appliance Technical Field The invention relates to the technical field of heat insulation materials, in particular to a method for preparing a heat insulation material by a dry method, the heat insulation material and a household appliance. Background The existing structure of the low heat conduction heat insulation 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 the film bag at high temperature by using a polyethylene adhesive layer to prepare the vacuum heat insulation 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 structural member is available, so that the processing difficulty can be reduced and the heat bridge effect can be reduced. But the heat insulation material made of the powdery micro-nano structure has higher heat conductivity coefficient, and is difficult to meet the heat insulation requirement. In a comprehensive view, the heat insulation material which can be directly used in the prior art 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 method for preparing a heat insulating material by dry method, comprising the steps of: Providing a hard shell, wherein the hard shell is provided with a first opening and a second opening which are communicated with the inner cavity of the hard shell; And filling the dispersed organic fibers into the hard shell from the first opening by blowing so as to form the heat insulation material. In one embodiment, the step of providing a rigid housing having a first opening and a second opening communicating with an interior cavity thereof, the rigid housing 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 step of filling the dispersed organic fibers from the first opening into the hard shell by blowing to form a thermal insulation material comprises: filling the dispersed organic fibers into the hard shell from the first opening in a blowing mode; And after filling, vacuumizing the hard shell, and sealing the first opening and the second opening to form the heat insulation material. In one embodiment, the step of sealing the first opening and the second opening after evacuating the rigid housing after filling to form a heat insulating material comprises: After filling is completed, introducing gas from the first opening or the second opening to inflate the organic fibers dispersed in the hard shell; And after the air inflation is completed, vacuumizing the hard shell, and sealing the first opening and the second opening to form the heat insulation material. In one embodiment, the step of filling the dispersed organic fibers from the first opening into the hard shell by blowing further comprises, prior to the step of forming the insulating material: and scattering the bundled organic fibers by a blowing mode, and filtering to obtain the dispersed organic fibers. In one embodiment, the blowing method comprises the steps of introducing gas into the hard shell: the temperature of the gas is 70-200 ℃, and/or, The pressure of the gas is 0.3-0.9 MPa. In one embodiment, after the hard shell is evacuated after filling is compl