Refrigerator Wall Structure With High-Gloss Polystyrene Vacuum Insulation
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Solution Overview
Problem
Existing household refrigeration appliances lack a wall structure that effectively combines high thermal insulation, impact resistance, and antibacterial properties while maintaining ease of production and cleanability, particularly in vacuum insulation elements.
Innovation Solution
A multi-layered wall structure for household refrigeration appliances featuring a full vacuum door with a 6-layer shell, including a high-gloss polystyrene final layer, which enhances thermal insulation, impact resistance, and antibacterial properties, and allows for seamless integration with existing production methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a multi-layered shell structure is used to improve thermal insulation and impact resistance, then the thermal insulation performance and durability are improved, but the manufacturing complexity increases
Solution Approach 1:
The shell is divided into multiple functional layers (outer layer, intermediate layers, inner layer) with distinct thicknesses and material properties. Each layer serves specific purposes: the outer layer provides impact resistance, intermediate layers provide thermal insulation, and the inner layer ensures cleanability. This segmentation allows optimization of each layer's function while maintaining overall system performance.
Solution Approach 2:
The shell uses composite material structure with at least three different plastic materials having different thermal conductivities and mechanical properties. This composite approach enables simultaneous achievement of thermal insulation (through low thermal conductivity materials) and impact resistance (through mechanically strong materials) while managing the complexity through systematic material selection.
2Temperature
If additional thermal insulation foam is added to improve thermal insulation, then the insulation performance is improved, but the usable volume of the appliance decreases
Solution Approach 1:
The shell itself is designed as a thin-walled multi-layered structure that provides thermal insulation functionality without requiring additional thick insulation foam. The multi-layered design with optimized thicknesses (outer layer: 1-5mm, intermediate layers: 0.5-2mm each, inner layer: 0.5-2mm) achieves the required thermal insulation performance while minimizing the overall thickness, thereby maximizing the usable volume of the appliance.
Solution Approach 2:
The shell structure performs multiple functions simultaneously: it provides structural support, impact resistance, thermal insulation, and cleanability. This multi-functionality eliminates the need for separate insulation foam layers, as the shell itself is engineered to provide the necessary thermal insulation performance.
3Ease of operation
If a high-gloss polystyrene final layer is applied to improve cleanability and scratch resistance, then the ease of cleaning and surface durability are improved, but the manufacturing complexity increases
Solution Approach 1:
The inner layer facing the interior space is specifically designed with high-gloss polystyrene material having particular surface properties (glossiness, smoothness) that enhance cleanability and scratch resistance. This local quality optimization focuses the enhanced properties where they are most needed (inner surface exposed to cleaning) while keeping other layers simpler.
Solution Approach 2:
The high-gloss polystyrene inner layer is integrated as part of the multi-layered composite structure, combining the aesthetic and functional benefits of high-gloss finish with the structural benefits of the multi-layered design. The material selection for each layer is optimized for its specific function while maintaining compatibility with the overall manufacturing process.
4Reliability
If the shell is designed with multiple layers to reduce gas diffusion, then the barrier performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The shell is segmented into multiple layers with each layer contributing to the overall gas diffusion barrier performance. The intermediate layers are specifically designed with materials and thicknesses that provide diffusion resistance to water vapor and other gases. This segmentation creates a multi-barrier system that is more effective than a single thick layer.
Solution Approach 2:
The multi-layered structure uses composite materials with different permeability characteristics to create an effective gas diffusion barrier. By combining materials with complementary properties (some with low water vapor transmission, others with low oxygen transmission), the system achieves superior barrier performance that exceeds the sum of individual layers.
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 6-layer structure with a high-gloss polystyrene final layer improves thermal insulation, reduces gas diffusion, enhances cleanability, and increases scratch resistance, while maintaining production efficiency and allowing for increased usable volume by eliminating additional thermal insulation foam.
Implementation Method 1
vacuum insulation elements are arranged in the door and/or in other walls delimiting the interior space for thermal insulation
Implementation Method 2
a layer structure specified in the number of layers reduces the diffusion of atmospheric gases such as nitrogen, oxygen, carbon dioxide and water vapor
Data Source
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AI summary
The invention relates to a wall (4a - 4e, 5) for a household refrigeration appliance (1), having an enveloping (19) which defines a cavity in which a thermal insulating material (12) is arranged. Said enveloping (19) comprises a multi-layered shell (10, 11). A top layer (21) finishing the layer structure comprises (20) high gloss polystyrene and/or silver particles and the layer structure (20) has 6 layers. The invention also relates to a wall (4a - 4e, 5) for a household refrigeration appliance (1), comprising an enveloping (19) which defines a cavity which is thermally insulated. Said enveloping (19) comprises a multi-layered shell (10, 11). Said wall (4a - 4e, 5) comprises a vacuum insulation element (8), and the shell (10, 11) is a shell of the vacuum insulation element (8) which has a top layer (21) finishing the layer structure (20) and comprises high gloss polystyrene and/or silver particles.