Heating Cooker Shielding Glass Connection for Wave Leakage Control
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Solution Overview
Problem
Existing heating cookers, such as microwave ovens, suffer from insufficient electromagnetic wave shielding, leading to potential leakage of electromagnetic waves through openings in the door, compromising the integrity of the heating chamber.
Innovation Solution
Incorporating electromagnetic wave shielding glass with a metal mesh connected to a grounded panel member to seal and electrically connect the opening, preventing electromagnetic wave leakage while allowing an imaging device to capture the interior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electromagnetic wave shielding glass is provided on the door to maintain transparency for imaging, then imaging functionality is enabled, but electromagnetic wave shielding performance becomes insufficient due to the electrically floating state of the glass
Solution Approach 1:
A connecting portion made of conductive material is introduced as an intermediary between the electromagnetic wave shielding glass and the panel member. This connecting portion electrically connects the glass to the grounded panel member, enabling the glass to function as an effective electromagnetic wave shield while maintaining its transparent imaging function. The intermediary resolves the contradiction by providing the necessary electrical connection without compromising optical transparency.
Solution Approach 2:
The door assembly becomes a composite structure combining transparent electromagnetic wave shielding glass, conductive connecting portions, and the panel member. This composite approach integrates multiple materials with different properties (optical transparency, electrical conductivity, mechanical strength) to simultaneously achieve imaging functionality and reliable electromagnetic wave shielding.
2Ease of operation
If the door is made transparent for imaging purposes, then the imaging device can capture the interior, but electromagnetic waves may leak through the opening portions
Solution Approach 1:
The connecting portion acts as a mediator that electrically grounds the transparent electromagnetic wave shielding glass to the panel member. This intermediary connection enables the glass to block electromagnetic waves effectively while maintaining its optical transparency for imaging operations, thus resolving the contradiction between imaging capability and electromagnetic wave leakage prevention.
Solution Approach 2:
The electrical state of the electromagnetic wave shielding glass is changed from floating to grounded through the connecting portion. This parameter change (electrical potential) transforms the glass from an ineffective shield to an effective electromagnetic wave barrier, allowing both imaging and leakage prevention to coexist.
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
Effectively minimizes electromagnetic wave leakage from the heating chamber while maintaining the functionality of the imaging device, ensuring efficient and secure heating operations.
Implementation Method 1
The electromagnetic wave shielding glass closes an opening portion formed in a part of the panel member... electrically connects a metal mesh of the electromagnetic wave shielding glass
Data Source
AI summary
A heating cooker includes a heating chamber, electromagnetic wave shielding glass, and a connecting portion. The heating chamber has a panel member surrounding an inner space capable of accommodating a heating object, and heats a heating object using an electromagnetic wave. The electromagnetic wave shielding glass closes the opening portion formed in a part of the panel member. The connecting portion is located on the panel member and electrically connects a metal mesh of the electromagnetic wave shielding glass.