Refrigerated Container Floor Plate Insulation and Load Transfer
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Solution Overview
Problem
Existing container floor plate designs face challenges in achieving good insulation while maintaining structural integrity, often resulting in delamination due to conflicting demands on load-carrying capacity and insulation properties.
Innovation Solution
The design incorporates transverse supports within the lower floor layer, which distribute forces from the upper floor layer to longitudinal supports, allowing the insulating layer to focus solely on insulation without load-bearing responsibilities, using support blocks with higher deformation resistance to prevent delamination and optimize insulation material properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the insulating layer is made solid to carry the weight of goods, then the load-carrying capacity is improved, but the insulating properties are reduced
Solution Approach 1:
The floor plate is segmented into three distinct layers: upper floor layer, insulating layer, and lower floor layer. The support blocks are positioned only at discrete locations between the upper and lower floor layers, creating localized load transfer points rather than continuous support. This segmentation allows the insulating layer to remain lightweight and insulative while still providing adequate structural support through the distributed support blocks.
Solution Approach 2:
The support blocks provide localized structural reinforcement at specific positions between the upper and lower floor layers. Instead of making the entire insulating layer solid, the support blocks concentrate the load-carrying function at discrete locations, allowing the insulating layer to maintain its lightweight, insulative properties in areas where load-bearing is not required.
2Stability of the object's composition
If the insulating layer carries the entire load, then the structural integrity is improved, but the insulating efficiency is reduced
Solution Approach 1:
The structural support function is segmented from the insulating layer by introducing discrete support blocks. These support blocks are positioned at critical locations to provide structural integrity, while the insulating layer itself remains lightweight and optimized for thermal insulation. The upper and lower floor layers provide additional structural stability.
Solution Approach 2:
The floor plate uses a composite structure combining different materials with complementary properties: the upper and lower floor layers provide structural strength, the insulating layer provides thermal insulation, and the support blocks provide localized load-bearing capacity. This composite approach allows each layer to be optimized for its specific function without compromising overall performance.
3Reliability
If support blocks with high deformation resistance are used, then delamination is prevented, but material mass increases
Solution Approach 1:
High deformation resistance is provided locally at the support blocks rather than throughout the entire insulating layer. The support blocks are positioned at discrete locations where load transfer occurs between the upper and lower floor layers, providing delamination prevention only where needed. This localized approach prevents unnecessary material usage while maintaining reliability.
Solution Approach 2:
The support blocks act as intermediary elements between the upper and lower floor layers, mediating the load transfer and preventing direct contact between the floor layers that could cause delamination. These support blocks provide the necessary deformation resistance at the interface, while the insulating layer itself remains lightweight and insulative.
Data Source
AI summary
The invention concerns a container floor plate (1), in particular for a refrigerated container, with an upper floor layer (2), a lower floor layer (3) and an intermediate insulating layer (8), support blocks (9) being located between the upper floor layer (2) and the lower floor layer (3). The purpose of the invention is to obtain a good insulation with a small mass. For this purpose, the lower floor layer (3) is provided with several transversal supports (10, 11), each support block (9) being supported on a transversal support (10).