Microwave Oven Door Shielding for Clear Viewing Without Leakage
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Solution Overview
Problem
Microwave ovens face challenges in providing clear visibility into the cooking compartment without leaking microwaves, leading to inefficiencies in monitoring cooking progress and potential heat loss, which affects energy consumption and safety.
Innovation Solution
A cooking apparatus with a door featuring a multi-shielding layer coated on a transparent or translucent substrate, including a main shielding layer made of metal, an insulating layer, a base layer, a buffer layer, and a protective layer, coupled with a choke structure to prevent microwave leakage while allowing visibility through a transparent or translucent door frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a perforated metal plate is used in the door, then microwaves are prevented from leaking, but visibility of the cooking compartment is insufficient
Solution Approach 1:
The door employs a composite structure combining a transparent or translucent substrate (glass or plastic) with a multi-shielding layer containing metal particles or mesh. This composite material allows visible light to pass through for good visibility while the metal components block microwave radiation, resolving the contradiction between visibility and microwave leakage prevention.
Solution Approach 2:
The door structure applies different materials with different properties to different regions: the substrate provides transparency for visibility, while the multi-shielding layer with metal particles or mesh provides microwave blocking. This local differentiation of material properties allows simultaneous achievement of visibility and microwave containment.
2Illumination intensity
If the door is opened to check cooking state, then visibility is improved, but heat loss and energy consumption increase
Solution Approach 1:
The transparent substrate with multi-shielding layer allows users to observe the cooking compartment through the closed door, eliminating the need to open the door for monitoring. This maintains thermal insulation and prevents heat loss while providing sufficient visibility to check cooking progress.
3Illumination intensity
If a transparent substrate is used for visibility, then visibility is improved, but microwave leakage occurs
Solution Approach 1:
The transparent substrate is combined with a multi-shielding layer containing metal particles, metallic coating, or mesh structure. The metal components block microwave radiation while the transparent substrate allows visible light transmission, achieving both visibility and microwave containment simultaneously.
Solution Approach 2:
The door structure applies different materials with different properties to different regions: the transparent substrate provides visibility, while the multi-shielding layer with metal particles or mesh provides microwave blocking. This local differentiation of material properties allows simultaneous achievement of visibility and microwave containment.
4Reliability
If multiple shielding layers are added to block microwaves, then microwave leakage prevention is improved, but device complexity increases
Solution Approach 1:
The multi-shielding layer integrates multiple functional components (metal particles, metallic coating, and mesh structure) into a single composite layer applied to the substrate. This integrated approach provides effective microwave blocking while maintaining relative structural simplicity compared to multiple separate layers.
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
Enhances visibility into the cooking compartment without opening the door, reduces heat loss, and improves energy efficiency by effectively blocking microwaves while maintaining transparency, thus allowing for safer and more efficient cooking.
Implementation Method 1
a shielding plate including a substrate and a multi-shielding layer, with which the substrate is coated to prevent microwaves in the cooking compartment from leaking to an outside
Implementation Method 2
The substrate may be made of a glass or plastic material to be seen through
Implementation Method 3
The multi-shielding layer may include an insulating layer stacked between the substrate and the main shielding layer
Data Source
AI summary
Disclosed herein are a cooking apparatus including a main body including a cooking compartment configured to cook food using microwaves, and a door configured to open or close the cooking compartment, wherein the door includes a door frame in which an opening is formed so that the cooking compartment is visible therethrough, and a shielding plate including a substrate and a multi-shielding layer, with which the substrate is coated to prevent microwaves in the cooking compartment from leaking to an outside, and coupled at the opening. The door of the cooking apparatus allows an inside of the cooking compartment to be better seen from the outside.