Induction Hotplate with Segmented Energy Elements
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Solution Overview
Problem
Existing induction cooking appliances restrict cookware positioning due to fixed heating zones, leading to inefficient energy transfer and increased costs for larger induction elements.
Innovation Solution
A hob with independently activatable energy transmission elements arranged in a planar pattern with at least 3-fold symmetry, equipped with pot detection and markings to facilitate flexible cookware placement and energy transfer, allowing for the activation of multiple elements regardless of cookware size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If fixed heating zones are used, then energy transmission efficiency is improved, but cookware positioning flexibility deteriorates
Solution Approach 1:
The heating surface is divided into multiple independently controllable energy transmission elements (induction coils) arranged in a planar pattern. Each coil can be activated separately based on cookware position and size, allowing flexible positioning while maintaining efficient energy transfer to covered coils.
Solution Approach 2:
The system dynamically activates or deactivates individual energy transmission elements based on real-time detection of cookware position and coverage. This dynamic control allows the heating pattern to adapt to different cookware configurations, maintaining energy efficiency while providing positioning flexibility.
2Adaptability or versatility
If larger induction elements are used, then cookware positioning flexibility is improved, but manufacturing cost increases
Solution Approach 1:
Instead of using fewer large induction elements, the system uses multiple smaller coils arranged in a planar pattern. This segmentation achieves positioning flexibility through coordinated activation of multiple small elements rather than relying on large individual elements, reducing manufacturing costs.
Solution Approach 2:
Multiple small energy transmission elements work together to provide the heating area equivalent to larger elements. By combining the output of several small coils, the system achieves the same flexibility and coverage as larger elements would provide, but at lower cost.
3Adaptability or versatility
If energy transmission elements are distributed over the surface, then cookware positioning flexibility is improved, but system complexity increases
Solution Approach 1:
Each energy transmission element serves multiple functions: it can be independently activated, contributes to overall heating coverage, and works in coordination with adjacent elements. This multi-functionality reduces the need for additional specialized components, managing system complexity while providing positioning flexibility.
Solution Approach 2:
The system uses automatic pot detection and intelligent control algorithms to manage the complexity of coordinating multiple energy transmission elements. The control system automatically determines which coils to activate based on cookware position, eliminating the need for complex manual configuration or additional mechanical components.
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 free positioning of cookware, reduces position dependency of energy transmission, and maintains high energy transfer efficiency by ensuring sufficient coverage and activation of energy transmission elements, even with larger cookware.
Implementation Method 1
induction coils
Implementation Method 2
heating zones lying underneath
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A cooktop is described comprising a hotplate (15) and several independently activatable energy transfer elements arranged below the hotplate (15), each energy transfer element being equipped with a pot detection device and having at least one first marking (13) on the hotplate (15) for each energy transfer element. The energy transfer elements are distributed in a planar pattern with at least threefold symmetry over the entire surface of the hotplate (15). In the method for operating the cooktop, a cookware item is placed on the hotplate such that a maximum number of identical markings are covered.