Appliance Door Mounting Bracket for Outer Pane Heat Reduction
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Solution Overview
Problem
Existing household appliance doors face issues with high temperatures on the outer pane due to heat conduction through metallic carrier profiles, leading to potential burns and inefficient heat dissipation, particularly in the upper areas where fastening elements are located.
Innovation Solution
The design incorporates a mounting bracket with multiple spacer webs that create an offset area for the carrier profile, allowing better air flow and heat dissipation, combined with embossing for increased rigidity and material strength, and a detachable fastening mechanism for service and cleaning purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic carrier profile is used to support the inner pane against the outer pane, then the strength and rigidity of the door structure is improved, but heat is conducted to the outer pane causing local hot spots that can burn users
Solution Approach 1:
A mounting bracket is introduced as an intermediary component between the carrier profile and the outer pane. This bracket serves as a thermal bridge mediator that can be strategically positioned and designed to control heat transfer paths while maintaining structural support functionality.
Solution Approach 2:
The mounting bracket is divided into multiple functional areas: an adhesive area for bonding to the outer pane, an offset area for receiving the carrier profile, and spacer webs connecting these areas. This segmentation allows each region to be optimized for its specific function while collectively managing thermal and mechanical loads.
2Strength
If a closed profile structure is used for the mounting bracket, then material strength is improved, but air flow and heat dissipation are restricted
Solution Approach 1:
The mounting bracket employs a porous or open-web structure with multiple spacer webs creating channels for air flow. This porous configuration allows convective heat transfer to occur through the bracket structure itself, significantly improving heat dissipation while the web arrangement maintains adequate structural strength.
Solution Approach 2:
The mounting bracket combines metallic material for structural strength with adhesive materials for bonding. This composite approach allows the metal spacer webs to provide mechanical strength and thermal conduction paths, while the adhesive bonds provide additional structural support with minimal thermal conduction, creating a thermally managed composite structure.
3Stability of the object's composition
If more material is used in the offset area to increase rigidity, then the rigidity relative to the adhesive surface is improved, but thermal bridges are increased and heat dissipation is reduced
Solution Approach 1:
The spacer webs are designed with embossings that extend over at least 70% of their length, creating three-dimensional structural features that increase the area moment of inertia. This dimensional enhancement provides increased rigidity and bending resistance without requiring additional material thickness, thereby maintaining low thermal bridge formation.
Solution Approach 2:
The embossing geometry parameters (depth, width, length coverage) are optimized to achieve the required rigidity. By changing the geometric parameters of the spacer webs through embossing rather than increasing material quantity, the design achieves high rigidity with minimal material, reducing thermal conduction paths.
4Stability of the object's composition
If the carrier profile is permanently fixed to the mounting bracket, then structural stability is improved, but serviceability and cleaning access are reduced
Solution Approach 1:
The connection between the carrier profile and mounting bracket is designed to be dynamically adjustable between a fixed state during operation (providing structural stability) and a detachable state during service (enabling access and cleaning). This dynamic capability allows the system to switch between stability and serviceability modes as needed.
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 bridges, minimizes material usage while maintaining high strength and rigidity, and effectively dissipates heat through convection, preventing excessive temperature buildup on the outer pane.
Implementation Method 1
air can flow better around the material that ensures the spacing of the offset area, and thus heat that is conducted to the webs via the offset area can be better dissipated
Implementation Method 2
the material strength itself is also increased due to the (cold) deformation of the material during the embossing process
Implementation Method 3
an adhesive area of a fastening bracket of the household appliance door is glued to the outer pane
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The door (10) has an outer pane and an inner pane where an adhesive portion (32) of a mounting bracket (30) is bonded with an outer pane and a carrier profile is supported at the inner pane. The carrier profile is secured at a displacement region of the mounting bracket. The displacement region is spaced opposite to the adhesive area by spacing bars (34-37). The carrier profile is releasable fastened with the mounting bracket made of a stainless steel metal sheet. The displacement region comprises a connection section for connection with the carrier profile.