Transport Vehicle Door Leaf Thermal Bridging Reduction
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Solution Overview
Problem
Conventional door leaves in transport vehicles suffer from thermal bridging issues, which compromise thermal insulation despite providing mechanical strength, and existing solutions either fail to adequately address this or introduce additional costs or mechanical instability.
Innovation Solution
A door leaf design featuring a structural frame with separate profiles and a honeycomb structure made of materials with high thermal insulation properties, such as a resin matrix with aramid fibers, which are bonded to the facings to reduce thermal bridging and maintain mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional structural frame with aluminum profile is used to ensure mechanical strength, then mechanical strength is improved, but thermal bridging increases and thermal insulation deteriorates
Solution Approach 1:
The structural frame is divided into separate components: an aluminum profile for mechanical strength and a distinct thermal insulation block for thermal performance. This segmentation allows each component to optimize its specific function without compromising the other, eliminating thermal bridges while maintaining structural integrity.
Solution Approach 2:
The door leaf employs a composite structure combining aluminum profile (for strength) with thermal insulation material (for thermal performance). This composite approach integrates materials with different properties to simultaneously achieve mechanical strength and thermal insulation, resolving the contradiction between these two requirements.
2Loss of energy
If thermal insulation materials are added to reduce thermal bridging, then thermal insulation is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The thermal insulation block is integrated into the existing structural frame design, merging thermal insulation functionality with the structural component. This combination approach adds thermal performance without significantly increasing overall device complexity, as the insulation block becomes part of the frame assembly rather than a separate added component.
3Loss of energy
If an open-type structural frame is used to improve thermal insulation, then thermal insulation is improved, but mechanical stability deteriorates due to increased deflection
Solution Approach 1:
By segmenting the frame into separate aluminum profile and insulation block components, the design maintains the closed structural configuration needed for mechanical stability while introducing thermal breaks. The insulation block fits within the structural framework rather than replacing it, preserving stability while improving thermal 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 significantly improves thermal insulation while maintaining mechanical integrity and reduces thermal bridging, allowing for cost-effective and adaptable installation in various vehicles.
Implementation Method 1
A door leaf design featuring a structural frame with separate profiles and a honeycomb structure made of materials with high thermal insulation properties, such as a resin matrix with aramid fibers, which are bonded to the facings to reduce thermal bridging
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
This leaf (1) comprises an inner facing (24), an outer facing (26), a core (28) made of a first material, a structural frame (3-6) referred to as the leaf frame, and, where applicable, a frame referred to as the opening frame. This leaf frame and/or the possible opening frame each comprise at least one peripheral element, each including an inner profile (30) and an outer profile (31), at least one of which is provided with means (32, 33) for retaining a sealing gasket. According to the invention, for at least one peripheral element, the inner and outer profiles are mutually distinct, being separated by at least one spacer block (35) formed by a honeycomb structure, which is made of a material having thermal insulation properties superior to those of the material constituting the profiles.