Heating Element Insulation Barrier for Higher-Voltage Operation
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Solution Overview
Problem
Existing electrical resistance heaters are not suitable for higher-voltage applications due to limitations in dielectric strength of the dielectric materials used, which restrict their operational capabilities.
Innovation Solution
Incorporating an electrically insulating barrier with a dielectric strength greater than 1500 kV/m between portions of the heating element, electrical supply pin, and/or casing, along with an electrically insulating filler, to enhance dielectric strength and enable operation at higher voltages without increasing the size of the heating element unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dielectric materials are used in electrical resistance heaters, then the heater structure remains simple and compact, but the dielectric strength is insufficient for higher-voltage applications
Solution Approach 1:
The patent applies composite materials by combining conventional dielectric materials with an electrically insulating barrier having superior dielectric strength properties. This composite structure enables the heater to withstand higher voltages while maintaining structural integrity, directly resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The patent segments the dielectric system into two distinct components: the conventional dielectric material and the electrically insulating barrier. This segmentation allows each component to perform its specialized function optimally, with the barrier providing enhanced dielectric strength where needed, thus improving reliability without requiring complete redesign of the entire heater structure.
2Reliability
If the size of the heating element unit is increased to accommodate higher voltage operation, then dielectric strength requirements are met, but the compactness and size remain excessive
Solution Approach 1:
The patent applies local quality by placing the electrically insulating barrier specifically in regions where high dielectric strength is most critical, rather than uniformly increasing the size of the entire heating element unit. This localized approach meets dielectric strength requirements for higher voltage operation while maintaining compact overall dimensions.
Solution Approach 2:
By using composite materials with superior dielectric properties, the patent achieves the required dielectric strength in a more space-efficient manner, avoiding the need to increase the volume of the heating element unit while still meeting higher voltage operational requirements.
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
The solution allows for the operation of heating element units at higher voltages without a concomitant increase in size, thereby expanding the operational range of electrical resistance heaters.
Implementation Method 1
the electrically insulating barrier having a greater dielectric strength than the electrically insulating filler, wherein the dielectric strength of the electrically insulating barrier is greater than about 1500 kV/m
Implementation Method 2
A typical electrical resistance heater comprises a heating element (e.g. a wire) with high electrical resistivity which is surrounded by a heat conducting dielectric material. As an electrical current is passed through the heating element, heat is generated.
Data Source
AI summary
A heating element unit for an electric resistance heater comprises: a casing; a heating element within the casing; an electrical supply pin in electrical contact with the heating element; an electrically insulating filler between the heating element and the casing; and an electrically insulating barrier provided between portions of the heating element, the electrical supply pin and/or the casing. The electrically insulating barrier has a greater dielectric strength than the electrically insulating filler, and the dielectric strength of the electrically insulating barrier is greater than about 1500 kV/m (greater than about 40 V/mil).