Vacuum Insulation Panel Core Structure for Pressure Stability
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Solution Overview
Problem
Vacuum insulation panels with lower thermal conductivity than polyurethane foam cause structural instability in refrigerators due to higher density, leading to potential deformation under pressure.
Innovation Solution
A vacuum insulation panel design featuring a core structure with a first and second plate of porous materials with a Young's modulus of at least 30 MPa, supported by thicker porous members, maintaining structural flatness and reducing density by optimizing thickness and area ratios, and using a covering material to maintain a vacuum state and block moisture and gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If vacuum insulation panels are used to reduce wall thickness, then insulation performance is improved, but structural stability deteriorates due to higher density
Solution Approach 1:
The core material is divided into multiple plates (first plate, second plate, third plate) with supporting members positioned between them. This segmentation allows the structure to maintain insulation performance while distributing mechanical loads across multiple components, preventing deformation under pressure despite reduced overall density.
Solution Approach 2:
The invention uses composite construction combining multiple porous material plates with supporting members. The core material comprises different porous materials (first, second, third porous materials) with specific Young's modulus requirements (≥30 MPa), creating a composite structure that achieves both low density and high structural stability.
2Weight of stationary object
If density is reduced to prevent structural load, then structural stability worsens, but insulation performance improves
Solution Approach 1:
Different regions of the core material have different properties. The supporting members have greater thickness than the plates, and specific porous materials are assigned to different positions (first, second, third porous materials) to optimize both local structural support and overall density reduction while maintaining insulation performance.
Solution Approach 2:
The invention specifies precise parameter ranges: Young's modulus of porous materials ≥30 MPa, supporting member thickness greater than plate thickness, and area ratios between supporting members and plates within specific ranges (5.64%-11.60%). These parameter optimizations enable the structure to maintain stability at reduced density.
3Weight of stationary object
If plate thickness is reduced to lower density, then structural strength deteriorates, but insulation performance improves
Solution Approach 1:
Thicker supporting members are positioned between the plates to compensate for the reduced thickness of the plates themselves. The supporting members have greater thickness than the plates and provide the necessary structural strength to prevent deformation under pressure, while the overall structure maintains reduced density for insulation performance.
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 design achieves improved insulation performance with reduced thermal conductivity and maintains structural integrity even at 6 atmospheres, reducing density by up to 86% compared to existing panels while preventing structural load on the refrigerator walls.
Implementation Method 1
the first plate including a first porous material with a Young's modulus of at least 30 megapascals (MPa); a second plate in the internal space, spaced from the first plate, and having the first thickness, the second plate including a second porous material with a Young's modulus of at least 30 MPa
Implementation Method 2
a covering material on an outer side of the core material and forming an internal space in which the core material is accommodated
Implementation Method 3
Vacuum insulation panels having lower thermal conductivity than polyurethane foam in refrigerators are being made
Data Source
AI summary
Provided is a vacuum insulation panel including a core material and a covering material on an outer side of the core material. The covering material forms an internal space in which the core material is accommodated, wherein the core material includes a first plate in the internal space and having a first thickness. The core material includes a second plate in the internal space, spaced from the first plate, and has the first thickness. The core material includes one supporting member between the first plate and the second plate and having a second thickness that is greater than the first thickness, wherein each of a surface of the first plate that is perpendicular to a thickness direction of the core material and a surface of the second plate that is perpendicular to the thickness direction has a first area.