Open-Cell Insulating Wall Structure for Residual Gas Venting
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Solution Overview
Problem
Conventional heat-insulating walls with open-cell urethane foam suffer from deterioration of heat-insulating properties and deformation due to residual gas trapped in independent cells, which are not effectively communicated with each other, leading to airtight closure and subsequent degradation.
Innovation Solution
A heat-insulating wall with an open-cell resin body formed by integral foaming, featuring cell film and skeleton portions with through-holes that allow cells to communicate, preventing deformation and maintaining heat-insulating performance over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open-cell urethane foam is used to fill the heat-insulating space, then the heat-insulating performance is improved, but the residual gas trapped in independent cells causes deterioration of heat-insulating properties and deformation over time
Solution Approach 1:
The patent applies porous materials by introducing through-holes within the cell walls of the urethane foam. These through-holes create communication pathways between adjacent cells, allowing residual gas to escape and preventing the airtight closure that leads to deformation. The controlled porosity modification maintains the insulating performance while eliminating the long-term stability issue.
Solution Approach 2:
The patent segments the cell structure by creating through-holes that divide the cell walls into multiple sections. This segmentation allows gas to move between cells rather than being trapped in independent closed cells, thereby preventing the buildup of pressure that causes deformation over time while maintaining the overall foam structure.
2Strength
If cells are made independent and airtight, then the structural integrity is maintained, but the residual gas causes deformation and deterioration of heat-insulating properties
Solution Approach 1:
The patent converts the harmful effect of residual gas by providing escape pathways through the cell walls. Instead of trying to eliminate the gas during foaming, the design allows the gas to naturally escape through the through-holes, transforming the potential harm into a benign situation where gas can vent without causing deformation or insulation deterioration.
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 prevents deterioration of heat-insulating properties and deformation by ensuring continuous communication between cells, resulting in a heat-insulating wall with high long-term reliability and improved thermal insulation.
Implementation Method 1
an open-cell resin body formed of a thermosetting resin, with which the heat-insulating space is filled by integral foaming
Data Source
AI summary
A heat-insulating housing (21) includes: a wall body; and an open-cell resin body (4) of thermosetting resin with which a heat-insulating space formed by the wall body is filled by integral foaming, the open-cell resin body including: a plurality of cells (47); a cell film portion (42); a cell skeleton portion (43); a first through-hole (44) formed so as to extend through the cell film portion; and a second through-hole (45) formed so as to extend through the cell skeleton portion, wherein the plurality of cells communicate with one another through the first through-hole and the second through-hole.