Vacuum Insulation Body with Leveling Compound for Surface Smoothness
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Solution Overview
Problem
Vacuum insulation bodies in refrigerators and freezers often exhibit unevenness due to density differences in the support material, which can lead to visible imperfections on sheet metal walls, posing challenges in achieving a smooth, high-quality surface.
Innovation Solution
A hardenable or hardened material is applied to compensate for unevenness between the vacuum film and the protective cover, forming a protective layer that also conceals imperfections and prevents damage to the vacuum film, using materials like cast resin or epoxy-based plastics that harden to create a smooth surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a vacuum insulation body with powder core is used, then thermal insulation performance is improved, but surface unevenness occurs due to density differences in the powder core
Solution Approach 1:
A leveling compound is introduced as an intermediary layer between the vacuum insulation body and the protective cover. This compound fills and levels the surface unevenness caused by density variations in the powder core, preventing the transmission of irregularities to the protective cover while maintaining the thermal insulation performance of the vacuum insulation body.
Solution Approach 2:
The protective structure is segmented into distinct functional layers: the vacuum insulation body for thermal insulation, the leveling compound for surface correction, and the protective cover for mechanical protection. This segmentation allows each layer to independently fulfill its specific function without compromising the others.
2Stability of the object's composition
If high pressure is applied to the foil of the vacuum insulation body, then dimensional stability is improved, but surface unevenness is transferred to the protective cover
Solution Approach 1:
The leveling compound serves as a mediator that absorbs and distributes the pressure applied to the vacuum insulation body foil. It prevents the direct transmission of pressure-induced unevenness to the protective cover, allowing dimensional stability to be maintained while preserving surface smoothness.
Solution Approach 2:
The leveling compound is applied beforehand to compensate for potential surface unevenness before the protective cover is installed. This pre-cushioning approach ensures that even if pressure is later applied to the foil, the protective cover will not exhibit surface deformations.
3Device complexity
If the protective cover directly contacts the vacuum film, then device complexity is reduced, but the vacuum film becomes vulnerable to damage
Solution Approach 1:
The leveling compound acts as a protective intermediary layer between the vacuum film and the protective cover. It provides mechanical protection to the vulnerable vacuum film while allowing the protective cover to maintain its structural function, thus enhancing reliability without significantly increasing device complexity.
4Manufacturing precision
If unevenness in the vacuum insulation body is avoided, then optical quality of sheet metal walls is improved, but manufacturing complexity increases
Solution Approach 1:
Rather than attempting to manufacture a perfectly uniform vacuum insulation body, the solution introduces a leveling compound as a post-manufacturing corrective measure. This approach achieves surface uniformity for optical quality while avoiding the complexity of controlling powder density during the insulation body manufacturing process.
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 compensates for surface irregularities, ensuring a visually appealing and damage-resistant vacuum insulation body, where the material forms a protective cover that maintains a smooth surface and prevents deformation on adjacent sheet metal walls.
Implementation Method 1
A hardening or hardened material is applied to compensate for unevenness between the vacuum film and the protective cover
Data Source
AI summary
The invention relates to a vacuum insulation body, comprising at least one vacuum-tight film, which encloses a vacuum region having at least one supporting material arranged therein, and comprising at least one protective shell for protecting said film, wherein a material that evens out unevenness of the film is located on the film.