Microwave Shielding Plate with Electrical Damage Detection Loop
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Solution Overview
Problem
Conventional microwave shielding layers in microwave cooking devices are difficult to detect for damage, leading to potential microwave leakage, as damage is not easily visible and can go unnoticed.
Innovation Solution
A microwave shielding plate with conductive layers and conductors forming a loop, where both ends of the conductor have wiring points, allowing for the formation of a shielding section and integration with a transparent mounting substrate, along with an electrical performance detector to monitor changes in electrical performance and detect damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal mesh is used for microwave shielding in a conventional microwave oven door, then the shielding function is effective, but the damage of the shielding layer is relatively intuitive and easily observed
Solution Approach 1:
The patent applies visualized microwave oven doors with shielding layers that change appearance or show visible indicators when damaged. This allows the damage detection to be easily observed by the naked eye, transforming the undetectable damage problem into a visually detectable state while maintaining shielding effectiveness
Solution Approach 2:
The patent incorporates detection mechanisms that provide feedback about the shielding layer's integrity. When damage occurs, the system detects the change in electrical performance or continuity and provides an observable signal (such as lighting up an indicator or displaying a message) to alert users of the damage
2Difficulty of detecting and measuring
If visualized microwave oven doors are used, then the shielding layer damage can be observed, but the damages are not easily observed by the naked eye and cause microwave leakage
Solution Approach 1:
The patent incorporates detection mechanisms that provide feedback about the shielding layer's integrity. When damage occurs, the system detects the change in electrical performance or continuity and provides an observable signal (such as lighting up an indicator or displaying a message) to alert users of the damage, ensuring both visibility and reliability
Solution Approach 2:
The patent replaces purely visual/mechanical damage indicators with electrical detection systems. By using electrical continuity testing or resistance measurement of the shielding layer, the system can detect damage that is not visually apparent, substituting mechanical observation with electrical sensing
3Difficulty of detecting and measuring
If a conductor is coupled into a conductive loop with wiring points, then the electrical performance can be monitored to detect damage, but the device complexity increases
Solution Approach 1:
The patent combines the shielding function with the detection function into a single integrated structure. The conductor that provides microwave shielding is the same conductor whose electrical continuity is monitored for damage detection. This merging eliminates the need for separate detection elements, reducing overall device complexity while maintaining detection capability
Solution Approach 2:
The conductor in the shielding plate serves multiple functions: it provides microwave shielding and simultaneously serves as the sensing element for damage detection. By making the shielding structure itself multi-functional, the patent avoids adding extra components that would increase complexity
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
Enables timely detection of microwave leakage by monitoring changes in electrical performance, ensuring the microwave shielding function is valid and reducing the risk of accidents by controlling the microwave cooking device accordingly.
Implementation Method 1
a shielding section covering the conductive layer is formed when the conductor is coupled into a conductive loop
Implementation Method 2
the microwave leakage can be detected in time by detecting the change of the electrical performance
Data Source
AI summary
A microwave shielding plate and a cooking device are disclosed. The microwave shielding plate includes one or more conductive layers, a conductor is provided in each of the conductive layers, and two ends of the conductor are provided with wiring points, so that a shielding section covering the conductive layers is formed when the conductor is coupled into a conductive loop.