Vacuum Insulation Core Layering for Radiant Heat Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vacuum insulation materials are limited in their ability to block heat transfer due to radiation, which affects their overall thermal insulation performance and durability.
Innovation Solution
A core member for vacuum insulation materials is designed with multiple core layers and a radiant heat-blocking film having an emissivity of 0.5 or less, typically made of glass wools, ceramic fibers, and an aluminum foil with iron, which effectively blocks heat transfer through conduction, convection, and radiation, and is integrated with a getter for long-term durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a radiant heat-blocking film with low emissivity is added to the core member, then heat transfer by radiation is blocked, but the structural integrity and durability may be compromised
Solution Approach 1:
The radiant heat-blocking film is positioned specifically between the core layers where it is needed for blocking radiative heat transfer, while the outer cover provides the primary structural protection. This localized placement allows the heat-blocking function to be added without compromising overall structural integrity.
Solution Approach 2:
The radiant heat-blocking film acts as an intermediary layer between the core layers, providing thermal radiation blocking while being protected by the outer cover structure. This intermediary positioning allows it to fulfill its thermal function without being directly exposed to mechanical stresses.
2Ease of manufacture
If the core member structure is simplified to improve manufacturing, then heat insulation performance deteriorates
Solution Approach 1:
The core member is segmented into distinct functional layers: glass fiber layers for convective heat transfer blocking and radiant heat-blocking films for radiative heat transfer blocking. This segmentation allows each layer to be optimized for its specific function while maintaining overall manufacturing feasibility through standardized layering.
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 significantly improves initial heat insulation properties and maintains thermal insulation for at least 10 years by effectively blocking radiant heat transfer, resulting in lower thermal conductivity and enhanced durability compared to existing materials.
Implementation Method 1
a radiant heat-blocking film having an emissivity of 0.5 or less, typically made of glass wools, ceramic fibers, and an aluminum foil with iron, which effectively blocks heat transfer through conduction, convection, and radiation
Implementation Method 2
a core member for vacuum insulation materials including a plurality of core layers and a radiant heat-blocking film disposed between the core layers
Implementation Method 3
vacuum insulation material
Data Source
Figure 1~2
Figure 3~4(b)
AI summary
Disclosed is a core member for a vacuum insulation material, the core member having high initial insulation performance and radiant heat blocking performance, and the vacuum insulation material using same. The vacuum insulation material according to the present invention comprises a plurality of core layers, a radiant heat blocking film which is disposed between the plurality of core layers, and an outer skin material which vacuum-packs the core layers and the radiant heat blocking film.