Heated Interior Surface Lamination to Limit Thermal Deformation
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Solution Overview
Problem
Existing interior surface arrangements face challenges such as high technical complexity in integrating planar heating elements, significant thermal deformation due to differing thermal expansions, high heating output requirements, and poor temperature controllability, particularly in motor vehicle applications.
Innovation Solution
The planar heating element is laminated or integrated directly into the decorative structure adjacent to the decorative layer, with adhesive bonding between layers, and optional haptic layers for thermal insulation, allowing for efficient heat transfer and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the planar heating element is integrated into the carrier part or loosely inserted into a decorative substructure, then the heating function is achieved, but the thermal deformation of the plastic assembly increases due to different thermal expansions of individual components
Solution Approach 1:
The heating element is laminated directly onto the decorative structure, merging the heating function with the decorative surface. This integration ensures that heat is generated at the decorative surface itself rather than being transferred from a separate carrier part, eliminating the bimetallic effect and thermal deformation caused by differential thermal expansion between separate components.
Solution Approach 2:
A haptic layer is introduced as an intermediary between the planar heating element and the carrier part. This haptic layer provides thermal insulation, preventing excessive heat transfer to the carrier part while maintaining the heating function at the decorative surface, thereby reducing thermal deformation of the plastic assembly.
2Speed
If the carrier part and decorative material are heated to achieve rapid heating of the decorative surface, then the heating speed improves, but the heating output required increases significantly
Solution Approach 1:
The heating element is positioned directly at the decorative surface, concentrating the heating action exactly where it is needed. This localized heating approach eliminates the waste of heating the entire carrier part and decorative material bulk, achieving rapid surface heating with lower overall energy output requirements.
3Duration of action of stationary object
If the carrier part is used as a heat storage element, then the thermal mass provides heat retention, but the controllability of the surface temperature deteriorates
Solution Approach 1:
The haptic layer acts as a thermal intermediary that provides controlled thermal insulation between the heating element and the carrier part. This allows the system to retain heat at the decorative surface while preventing excessive heat storage in the carrier part, thereby maintaining good temperature controllability.
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
This configuration reduces thermal deformation, enables rapid heating with lower outputs, and improves surface temperature controllability, addressing the limitations of prior art.
Implementation Method 1
the planar heating element to be laminated or integrated into the decorative structure, preferably directly adjacent to the decorative layer... the decorative surface is heated more rapidly with lower heating output
Implementation Method 2
The layers of the interior surface arrangement are each adhesively bonded to one another
Implementation Method 3
a haptic layer to be arranged between the planar heating element and the carrier layer. This affords the advantage of thermal insulation of the carrier part
Data Source
AI summary
An interior surface arrangement, preferably for motor vehicles, has a decorative structure including an outer cover layer, a surface heating element and a carrier layer. The surface heating element is integrated, preferably laminated, in the decorative structure adjacent to the outer cover layer.