Multi-Strip Radiant Heating Element for High-Power Hob Output
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Solution Overview
Problem
Current radiant heating devices for hobs are limited to a maximum heating output of approximately 3600 W due to the electrical resistance of the heating conductor strip, preventing higher heating outputs.
Innovation Solution
A heating device with a sheet-like support featuring a heating element composed of multiple heating conductor strips that are connected and corrugated, increasing the conductor cross-section and allowing for higher current and heating output, while maintaining thermal insulation and easy production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single heating conductor strip is used, then the device structure is simple, but the heating output is limited to approximately 3600 W
Solution Approach 1:
The heating element is divided into multiple heating conductor strips (at least two) that are placed together and connected in parallel. Each strip can be independently manufactured and then assembled, allowing the overall heating output to be increased by combining multiple segments while maintaining manageable complexity through modular construction.
Solution Approach 2:
Multiple heating conductor strips are merged by placing them together and connecting them in parallel configuration. This combining of multiple conductors increases the total heating output capability while distributing the electrical load and thermal stress across multiple elements.
2Power
If the heating conductor strip cross-section is increased to raise heating output, then higher power is achieved, but thermal expansion damage risk increases
Solution Approach 1:
Instead of using one thick conductor strip that would experience high thermal stress, the system uses multiple thinner strips placed together. Each individual strip experiences less thermal expansion stress, reducing the risk of damage while collectively providing the necessary heating output through parallel configuration.
Solution Approach 2:
The design changes the physical parameters of the heating element by using multiple strips with smaller individual cross-sections rather than one large cross-section. This parameter change distributes the thermal and mechanical stress across multiple elements, improving reliability while maintaining or increasing total heating capacity.
3Power
If multiple heating conductor strips are placed together and connected, then heating output increases, but the device structure becomes more complex
Solution Approach 1:
The heating element is segmented into multiple independent conductor strips that can be manufactured separately and then assembled by placing them together. This segmentation allows for standardized production of individual strips followed by simple assembly, increasing power output without proportionally increasing overall device 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
The solution enables a significant increase in heating output while maintaining thermal insulation and ease of production, reducing the risk of damage from thermal expansions and improving service life by ensuring effective heat emission and current flow.
Implementation Method 1
Owing to an electrical resistance of the heating conductor strip or heating element, maximum heating outputs for a radiant heating device of this kind are currently limited
Implementation Method 2
The two lateral sides of the heating conductor strip emit heat at somewhat above 1000° C. during operation, this heat then radiating upwards
Data Source
AI summary
A heating device in the form of a radiant heating device for a hob has a sheet-like support with a support top side, with at least one heating element on the support top side, which heating element is highly corrugated and runs in tracks in a laying pattern. The heating element has at least two heating conductor strips which each have lateral sides and a top edge and a bottom edge. These at least two heating conductor strips are placed together or placed on one another by way of their mutually facing lateral sides and are at least partially in contact. The at least two heating conductor strips are connected to one another in a fixed and non-detachable manner, advantageously before corrugation.