Electromagnetic Shielding Structure for Lower-Heat Wave Heating
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Solution Overview
Problem
Electromagnetic wave shielding films in heating devices face degradation due to heating when irradiated with electromagnetic waves, and it is challenging to reduce heating without compromising sheet resistance values, especially when thickness is limited by manufacturing restrictions.
Innovation Solution
The electromagnetic wave heating device employs a conductive housing with a first and second electromagnetic wave blocker formed with conductive materials, arranged at specific distances to block electromagnetic waves, and an electromagnetic wave generator and emitter to generate and emit waves within a space defined by these blockers, with the blockers connected electrically and spaced at specific angles relative to the wavelength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the thickness of the electromagnetic wave shielding film is increased to reduce heating, then the sheet resistance value is lowered and heating is reduced, but manufacturing restrictions prevent from freely setting a great thickness
Solution Approach 1:
The patent divides the electromagnetic wave shielding function into multiple separate blocking portions (first and second electromagnetic wave blocking portions) rather than using a single thick film. These segmented portions are arranged at specific distances from each other, allowing the system to achieve effective shielding while reducing the thickness requirement for each individual component, thereby addressing manufacturing restrictions.
Solution Approach 2:
The patent changes the spatial arrangement parameter by setting the distance between the first and second electromagnetic wave blocking portions to specific values (equal to or within λ×(180°×N±15°)/360°). This parameter optimization allows the system to achieve effective electromagnetic wave blocking with thinner components, resolving the contradiction between reducing heating and manufacturing constraints on thickness.
2Temperature
If the thickness of the electromagnetic wave shielding film is increased to reduce heating, then the sheet resistance value is lowered, but it is difficult to reduce heating when thickness is limited by manufacturing restrictions
Solution Approach 1:
The shielding function is segmented into multiple blocking portions arranged at specific distances. This segmentation allows each portion to be thinner while the collective arrangement provides effective shielding, reducing the quantity of material needed per component while maintaining overall performance.
Solution Approach 2:
The patent utilizes the electromagnetic wave propagation characteristics and wavelength relationships to convert the spacing between blocking portions into a beneficial effect. By setting distances based on wavelength fractions, the system creates constructive interference patterns that enhance shielding effectiveness, turning the potential harm of increased material usage into a benefit through optimized spatial arrangement.
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
This configuration reduces heating and power consumption of the electromagnetic wave blocking portions while maintaining effective electromagnetic wave blocking efficiency and transparency, even with insufficient thickness, by optimizing the electrical distance between the blockers.
Implementation Method 1
an electromagnetic wave generator to generate electromagnetic wave, the electromagnetic wave generator being disposed in a space formed inside the first blocker and the second blocker
Implementation Method 2
an electromagnetic wave shielding film formed with a conductive material in an electromagnetic wave heating device is heated by induction of a current by electromagnetic wave
Implementation Method 3
heated by induction of a current by electromagnetic wave
Implementation Method 4
a first electromagnetic wave blocking portion and a second electromagnetic wave blocking portion disposed along the first electromagnetic wave blocking portion
Data Source
AI summary
A conductive housing includes: a first blocking unit that is formed with a first conductive material in a box-like shape having an opening portion; and a second blocking unit including a first electromagnetic wave blocking portion that is formed with a second conductive material and extends in a first direction and a second direction orthogonal to the first direction, and a second electromagnetic wave blocking portion that is formed with a third conductive material, extends in the first direction and the second direction, and is disposed to face the first electromagnetic wave blocking portion at a distance. The second blocking unit is disposed in the opening portion, the first blocking unit is electrically connected to the first electromagnetic wave blocking portion and the second electromagnetic wave blocking portion, and the first blocking unit and the second blocking unit form a space inside.