Hybrid Induction Coil Geometry for Dead-Zone-Free Cookware Heating

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Solution Overview

Problem

Current induction coil designs in cooktop systems suffer from non-homogeneous heat distribution, reduced performance due to dead zones, and inefficient coverage of various cookware sizes and shapes, particularly with rectangular coil shapes.

Innovation Solution

Implementing induction coils with a hybrid shape comprising a rounded and rectangular portion, arranged in a specific pattern to enhance heat distribution and reduce magnetic field emissions, utilizing a continuous winding pattern with minimal gaps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If rectangular induction coil shapes are used, then the coil structure is simple and easy to manufacture, but heat distribution becomes non-homogeneous and dead zones appear

Engineering Contradiction:

Improvecoil structure simplicityVSAvoidheat distribution uniformity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies curvature by transitioning from rectangular coil shapes to circular or oval shapes. This curvature eliminates the sharp corners that create dead zones and magnetic field concentration points, resulting in more homogeneous heat distribution across the cooktop surface while maintaining manufacturing simplicity through continuous winding patterns.

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Adaptability or versatility

If induction coils are arranged to cover various cookware sizes, then coverage versatility improves, but magnetic field emissions and interference increase

Engineering Contradiction:

Improvecookware coverageVSAvoidmagnetic field emissions

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent implements local quality by varying the size and shape of individual induction coils according to their specific locations on the cooktop. Each coil is optimized for the typical cookware size and shape used at that position, improving overall versatility while controlling magnetic field emissions by avoiding excessive coil size in any single location.

Inventive Principle:

Principle #3Local quality

3Productivity

If induction coils operate at high power, then heating efficiency improves, but external magnetic field exposure increases

Engineering Contradiction:

Improveheating efficiencyVSAvoidexternal magnetic field exposure

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the potentially harmful effect of strong magnetic fields into a beneficial control mechanism by using magnetic field sensing to detect cookware presence and characteristics. This allows the system to optimize heating power dynamically, maintaining high heating efficiency when needed while reducing external magnetic field exposure by operating at lower powers when full power is not required.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Improves heat distribution and efficiency, enhances cooktop system performance by increasing coverage of cookware, and minimizes dead zones while reducing external magnetic field exposure.

Implementation Method 1

induction coils that are implemented in cooktop systems for heating one or more cookware devices

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

induction coil designs that facilitate induction heating to the cooktop systems

Methodology Applied

Scientific EffectInduction heating: Induction Heating

Data Source

PatentUS12520390B2Heating systems

Publication Date: 2026.01.06 PRIZER-PAINTER STOVE WORKS INC

AI summary

Some systems, devices and methods detailed herein provide induction coils and systems that include induction coils for heating one or more cookware devices.