Cooktop Heating Element Segmentation for Power and Safety
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Solution Overview
Problem
Existing heating devices with multiple independent heating elements lack efficient control mechanisms for balancing power distribution and temperature management, particularly in scenarios requiring both gentle warming and high-power boiling operations, leading to potential overheating risks and inefficient energy use.
Innovation Solution
A heating device design featuring multiple independent heating elements arranged in loops or spirals on a carrier with a central and outer area, where one heating element is connected to an overtemperature protection and another operates without protection, allowing for efficient power distribution and temperature control by covering a large area with heating elements and using an energy regulator for optimized power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all heating elements are connected to overtemperature protection, then safety is improved, but heating power and productivity are reduced due to frequent shutdowns
Solution Approach 1:
The heating device divides heating elements into two segments: protected heating elements (first and third) connected through overtemperature protection, and an unprotected heating element (second) that operates without interruption. This segmentation allows the system to maintain high power output through the unprotected element while safety-critical elements provide overtemperature monitoring and protection.
Solution Approach 2:
The invention applies partial protection by connecting only some heating elements (first and third) to overtemperature protection, while leaving the second heating element unprotected. This partial action enables the unprotected element to operate continuously at high power, compensating for power losses when protected elements are shut down, thus maintaining overall heating productivity.
2Area of stationary object
If heating elements are arranged to cover large area, then warming efficiency is improved, but power distribution control becomes more complex
Solution Approach 1:
The heating elements are segmented into independent units (first, second, and third heating elements) that can be controlled separately. Each heating element can be independently switched on or off, allowing flexible power distribution patterns across the heating surface without requiring complex centralized control systems.
Solution Approach 2:
The system uses partial activation of heating elements based on cooking requirements. The unprotected second heating element can operate independently for simple warming tasks, while protected elements are activated only when needed, reducing unnecessary complexity in power distribution control while maintaining large area coverage capability.
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 accelerated boiling and efficient warming operations while protecting against overheating, maintaining high power output during pre-boiling and reducing power when temperatures exceed safety limits, thus ensuring safe and energy-efficient cooking.
Implementation Method 1
The heating device has several independent and separate long or elongate heating elements... A first heating element is connected to an energy supply via this overtemperature protection... A second heating element is connected to a power supply without the interposition of this or another overtemperature protection
Implementation Method 2
The excess temperature protection can then act on the heating device in such a way that its heat output is reduced and the temperature drops again... the overtemperature protection in the form of a so-called rod regulator... The over-temperature protection switches off the two heating elements in the event of over-temperature
Data Source
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AI summary
A heating element for a cooking zone in a cooktop comprises three independent and separate long heating elements arranged along concentric circles on a support structure. The support structure has a central area around the center point, an outer area adjacent to an outer edge, and an intermediate area in between. A rod controller encircles the heating element for temperature sensing. The first and third heating elements are connected to a power supply via the rod controller. A second heating element is directly connected to a power supply without the rod controller; this second heating element is located on the support structure in the central area, the intermediate area, and the outer area.