Integrated Sheet-Coil Induction Cooker for Accurate Position Detection
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Solution Overview
Problem
Conventional induction heating cookers face challenges in accurately detecting the position of a heating object due to misalignment between the sensor coil and heating coil, leading to increased component count and cost, particularly when using litz wires, and flexible substrates, which compromise reliability.
Innovation Solution
The integration of a heating coil and sensor coil into a single body on a substrate, with diagonal sensor coil arrangements and laminated heating coil layers, reduces component count and misalignment, enhancing position detection accuracy while maintaining heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate heating coil and sensor coil structures are used, then heating function and position detection function are achieved, but misalignment occurs between sensor coil and heating coil reducing detection accuracy
Solution Approach 1:
The patent combines the heating coil and sensor coil into a single integrated coil structure. The coil serves dual functions: as a heating coil for inductive heating and as a sensor coil for detecting the position of the heating object. This integration eliminates misalignment issues between separate coils and improves detection accuracy while reducing device complexity.
2Productivity
If litz wires are used for heating coil, then heating efficiency is improved, but component count and cost increase
Solution Approach 1:
The patent creates a multi-functional coil that simultaneously performs heating and position detection functions. By using a single coil structure for both purposes, the number of components is reduced while maintaining heating efficiency. The integrated coil eliminates the need for separate heating and sensor coils, thereby reducing component count and associated costs.
3Adaptability or versatility
If flexible substrates are used for coil mounting, then installation flexibility is improved, but reliability decreases
Solution Approach 1:
The patent integrates the heating coil and sensor coil into a single rigid structure mounted on the substrate. This integration reduces the number of connections and mounting points required, thereby improving reliability while maintaining installation flexibility through the overall substrate design.
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 improves position detection accuracy, reduces component count, and ensures reliable heating by integrating the heating and sensor coils, allowing for efficient heating and reduced eddy current loss.
Implementation Method 1
at least one heating coil on the substrate and configured to inductively heat a heating object
Implementation Method 2
configured to inductively heat a heating object
Implementation Method 3
at least one sensor coil configured to detect a position of the heating object
Data Source
AI summary
An induction heating cooker including a top plate; a substrate positioned on a bottom surface of the top plate; at least one heating coil on the substrate and configured to inductively heat a heating object, the at least one heating coil being sheet-shaped; and at least one sensor coil configured to detect a position of the heating object, wherein the at least one sensor coil is on the substrate so that the at least one heating coil and the at least one sensor coil are integrated into a single body.