Microwave Oven Door Structure for Radiation-Tight Sealing
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Solution Overview
Problem
Cooking appliances with microwave capabilities face challenges in accommodating technical components due to limited space and the need for a radiation-tight seal to prevent microwave radiation escape.
Innovation Solution
A cooking appliance design featuring a cooking chamber door with an extended contact surface and stabilization device, which includes embossings or additional metal reinforcement, ensures a secure and radiation-tight seal while providing space for technical components, including a steam generator device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the cooking chamber door is equipped with an extended contact surface to accommodate technical components, then the space for installing components is improved, but the risk of warping and compromising radiation tightness increases
Solution Approach 1:
The contact surface is provided with local stabilizing structures (embossings or recesses) that create rigid zones specifically in areas subject to warping forces. This allows the surface to maintain its flatness and radiation tightness at critical contact points while still providing extended area for component mounting elsewhere.
Solution Approach 2:
The door assembly combines the door body material with additional stabilizing structures (metal embossings or recesses) to create a composite structure. This composite design provides both the extended contact surface area needed for components and the enhanced rigidity required to prevent warping and maintain radiation tightness.
2Adaptability or versatility
If the contact surface is made larger to provide mounting space, then component installation flexibility is improved, but the structural stability and flatness of the door deteriorates
Solution Approach 1:
The stabilizing structures (embossings or recesses) are strategically positioned in the contact surface to provide local reinforcement exactly where needed to maintain flatness, while other areas of the extended contact surface remain available for flexible component mounting.
Solution Approach 2:
The stabilizing structures utilize curved embossings or recesses that provide structural reinforcement through their geometric form. These curved features increase the moment of inertia and resist warping forces while maintaining the overall flat contact surface for component installation.
3Strength
If additional components are added to the door to provide stabilization, then the anti-warping capability is improved, but the device complexity increases
Solution Approach 1:
The stabilizing structures are merged with the door body itself rather than being separate components. The embossings or recesses are formed as integral features of the door, eliminating the need for additional separate stabilization components and reducing overall structural complexity.
Solution Approach 2:
The door structure is modified by changing its geometric parameters - adding embossings or recesses directly to the contact surface. This modifies the structural properties to provide stabilization while maintaining a relatively simple single-piece door construction rather than adding complex multi-component assemblies.
Data Source
Figure 1~2
Figure 3~4
AI summary
Cooking appliance (1) with a housing device (2) and a cooking chamber (3) formed in the housing device (2), into which the food to be cooked can be introduced via at least one loading opening (4). A microwave device (5) for heating the food to be cooked is assigned to the cooking chamber (3), the loading opening (5) being closable by a cooking chamber door (6). The cooking chamber door (6) comprises a frame device (7) and a pane device (8). On the side (9) facing the cooking chamber (4) when the cooking chamber door (6) is closed, the frame device (7) has an extended contact surface (10) which, when the cooking chamber door (6) is closed, on a corresponding bearing section (11) on the housing device ( 2) is present. A stabilizing device (12) is assigned to the contact surface (10).