Vacuum Insulation Getter Material Composite Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vacuum insulation materials require high raw material costs and heat treatment for activation, increasing manufacturing costs and limiting the durability of the getter material.
Innovation Solution
A vacuum insulation material with a getter unit formed by mixing a moisture absorbent and a gas adsorbent with non-woven fabrics, where the moisture absorbent includes materials like calcium oxide and the gas adsorbent includes an Fe-based compound, is used to improve durability while reducing costs by employing thermal compression in a vacuum environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional getter material is used for gas absorption, then gas adsorption capability is improved, but manufacturing cost increases due to high raw material costs and heat treatment requirements
Solution Approach 1:
The patent uses a composite getter material combining calcium oxide (moisture absorbent) and iron-based compound (gas adsorbent) in a 20:1 to 200:1 ratio. This composite structure provides both moisture absorption and gas adsorption capabilities while eliminating the need for expensive conventional getter materials and high-temperature heat treatment activation processes.
Solution Approach 2:
The patent changes the activation temperature parameter from 300°C or higher (conventional) to a lower temperature range, and modifies the composition parameters by using a specific ratio of calcium oxide to iron-based compound. These parameter changes reduce manufacturing costs while maintaining effective gas adsorption capability.
2Reliability
If a conventional getter material requiring heat treatment at 300°C or higher is used, then gas adsorption performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent fundamentally changes the activation temperature parameter from 300°C or higher to a lower temperature range, and modifies the composition parameters by using a specific ratio of calcium oxide to iron-based compound. These parameter changes simplify the manufacturing process and reduce equipment requirements while maintaining effective gas adsorption performance.
3Reliability
If an adsorbent for moisture absorption is included in the getter material, then moisture absorption capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent makes the iron-based compound perform dual functions: gas adsorption and moisture absorption. This eliminates the need for separate moisture absorbent materials, reduces material costs, and simplifies the overall getter material composition while maintaining both gas and moisture absorption capabilities.
Solution Approach 2:
The composite structure of calcium oxide and iron-based compound in a specific ratio provides synergistic effects where the iron-based compound contributes to both gas adsorption and moisture absorption, reducing the need for additional expensive materials while maintaining comprehensive protection against both gas and moisture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively absorbs gases, maintains a pressure-reduced state, and enhances durability, reducing manufacturing costs while maintaining the vacuum insulation material's integrity over time.
Implementation Method 1
a getter material, in which a moisture absorbent and a gas adsorbent are mixed
Implementation Method 2
a getter material, in which a moisture absorbent and a gas adsorbent are mixed
Data Source
AI summary
The vacuum thermal insulation material of the present invention comprises: a core material part which is hermetically sealed under reduced pressure; a getter part which is provided on one side in the middle of the core part; and an outer skin material part which surrounds the core material part and is hermetically sealed. In the getter part, a getter material, comprising a mixture of a hygroscopic material and a gas-adsorbing material, is packed in the form of a nonwoven fabric. In the vacuum thermal insulation material of the present invention, the hygroscopic material is any one of calcium oxide, calcium chloride, zeolite, silica gel, alumina and activated carbon, while the gas-adsorbing material is an oxygen-adsorbing material comprising a Fe based compound; and the hygroscopic material and the gas-adsorbing material are mixed in a ratio of between 20:1 and 200:1.