Domestic Oven Frame Structure With Floating Bearing Thermal Relief
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Solution Overview
Problem
Domestic ovens face issues with internal tensions in the frame structure due to thermal expansion, leading to potential breaks and enamel coating spallings, and existing solutions either fail to transmit forces effectively or exacerbate thermal stress.
Innovation Solution
The component plate features carrier extensions and elastic connecting means that allow relative movement between the side panels and the component plate, establishing a floating bearing function to compensate thermal expansion while maintaining a firm connection with the cavity, using a snap-on connection mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the component plate is designed as a flexible element to compensate thermal expansion, then thermal stress is reduced, but the transverse stiffness of the oven is decreased
Solution Approach 1:
The component plate is segmented into a plate body and carrier extensions that are firmly connected to each other but can move relative to the side panels. This segmentation allows the plate body to remain stiff for transverse loading while the extensions accommodate thermal expansion through relative movement.
Solution Approach 2:
The connection between the component plate and side panels is made dynamic through the floating bearing design, allowing relative movement in transverse direction during thermal expansion while maintaining firm connection in other directions. This dynamic connection adapts to thermal changes without creating stress.
2Strength
If the component plate is arranged as a stiff part in the oven frame, then the transverse stiffness is improved, but internal tensions due to thermal expansion increase
Solution Approach 1:
The component plate is segmented into a plate body and carrier extensions that are firmly connected to each other but can move relative to the side panels. This segmentation allows the plate body to remain stiff for transverse loading while the extensions accommodate thermal expansion through relative movement.
Solution Approach 2:
The carrier extensions act as intermediaries between the stiff component plate and the side panels. They transmit forces when needed but allow relative movement to accommodate thermal expansion, mediating between the conflicting requirements of stiffness and thermal compliance.
3Force
If a firm screw connection is used between the component plate and side panels, then force transmission is improved, but thermal expansion compensation is reduced
Solution Approach 1:
The connection between the component plate and side panels is made dynamic through the floating bearing design, allowing relative movement in transverse direction during thermal expansion while maintaining firm connection in other directions. This dynamic connection adapts to thermal changes without creating stress.
Solution Approach 2:
Different parts of the connection have different properties: the connection between carrier extensions and side panels allows movement for thermal expansion compensation, while the connection between plate body and carrier extensions maintains firm force transmission. This local differentiation resolves the contradiction.
4Force
If additional connection elements are added to maintain firm connection, then force transmission is improved, but device complexity increases
Solution Approach 1:
The floating bearing function and the connection structure are merged into a single integrated design. The carrier extensions and their openings combine the functions of force transmission and thermal expansion compensation without requiring separate connection elements, reducing complexity while maintaining 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
This design minimizes thermal stress in the frame structure, prevents breaks and enamel spallings, enhances transverse stiffness, and simplifies the mounting process without additional connection elements, ensuring the fan motor is not affected by thermal expansion.
Implementation Method 1
They can comprise at least one elastic element which penetrates a second opening in the side panel and which forms a snap-on connection with the side panel
Implementation Method 2
As thermal tensions could come into being during the heating of the cavity, the component plate is designed as a flexible element. This allows to compensate a thermal expansion during the use of the oven by a deformation of the component plate
Data Source
AI summary
The invention relates to a domestic oven (1), having a cavity (2) and a carrier structure (3, 4) connected with the cavity (2), wherein the carrier structure (3, 4) comprises at least two side panels (3) arranged in the side regions (5) of the oven (1) and a component plate (4), wherein the component plate (4) is connected with the side panels (3), wherein the side panels (3) extend in vertical direction (V) and in a first horizontal direction (H) and wherein the component plate (4) extends in a horizontal transverse direction (T) perpendicular to the first horizontal direction (H). To eliminate tensions in the carrier structure due to thermal expansion in an easy and cheap way, the invention is characterized in that the component plate (4) has at least one carrier extension (6) extending in transverse direction (T) which extends in a corresponding first opening (7) with at least one bearing surface (8) in the side panel (3), so that a relative movement in transverse direction (T) is allowed between the side panel (3) and the component plate (4).