Cooking Chamber Door Sealing Structure for Microwave Leakage Control
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Solution Overview
Problem
Cooking appliances with microwave functionality face challenges in ensuring radiation-tight sealing due to limited space for technical components, which can lead to microwave radiation leakage.
Innovation Solution
A cooking appliance design featuring a cooking chamber door with an extended contact face and a stabilizing device, such as metal sheet reinforcement or embossed deformations, to maintain a secure seal against the housing assembly, preventing distortion and ensuring radiation-tight closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple technical components are provided to enable various cooking functions, then the appliance's functionality and versatility are improved, but the available space for installing components is limited and device complexity increases
Solution Approach 1:
The patent combines multiple technical components (microwave device, steam generation device, control elements) into a single integrated cooking chamber, allowing various cooking functions to be performed in one appliance without requiring separate devices, thus improving versatility while managing space efficiently
Solution Approach 2:
The cooking chamber is designed to support multiple cooking modes (microwave heating, steam cooking, combination modes) through a universal chamber structure that can accommodate different technical components and operating conditions, enabling one appliance to perform multiple cooking functions
2Area of stationary object
If technical components are densely arranged to save space, then space utilization is improved, but the risk of microwave radiation leakage increases due to compromised sealing
Solution Approach 1:
The door assembly incorporates a specifically designed sealing structure with a sealing bead that protrudes into the cooking chamber and forms a sealing contact with the housing, providing enhanced local sealing quality at the critical door-housing interface to prevent microwave radiation leakage while maintaining compact dimensions
Solution Approach 2:
The door assembly uses a composite structure combining a door frame, door panel, and sealing bead made from materials with different properties (metal frame for structural integrity, transparent panel for visibility, elastomeric sealing bead for flexibility and sealing), creating a multi-material system that achieves both compact size and reliable radiation-tight sealing
3Reliability
If the contact face area is increased to improve sealing stability, then radiation-tight sealing is improved, but the door structure becomes more prone to distortion
Solution Approach 1:
The sealing bead is made from an elastomeric material that provides flexible sealing contact, allowing the sealing surface to conform to the housing while maintaining a compact door structure that is less prone to distortion, thus achieving reliable sealing without increasing overall door size
Solution Approach 2:
The sealing bead protrudes into the cooking chamber by a specific distance, creating a three-dimensional sealing geometry that provides stable sealing contact without requiring a larger contact face area on the door, thereby maintaining door structural stability while ensuring reliable sealing
Data Source
AI summary
A cooking appliance includes at least one housing assembly and at least one cooking chamber formed in the housing assembly. The at least one cooking chamber includes at least one loading opening. At least one cooking chamber door closes the at least one loading opening. The at least one cooking chamber door includes at least one frame assembly and at least one window assembly. The at least one frame assembly includes a plurality of edges, with at least one contact face at each of the edges on a side of the at least one cooking chamber door that faces the at least one cooking chamber when the at least one cooking chamber door is closed. At least one of the contact faces is an at least one extended contact face that is significantly larger than the remaining contact faces with respect to at least one geometric dimension.