Induction Cooktop Thin Film Radial Segmentation
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Solution Overview
Problem
Induction heating cooktops face challenges in efficiently heating both magnetic and nonmagnetic objects, with existing solutions experiencing low heating efficiency and material costs, and issues with thermal deformation of thin films due to temperature differences.
Innovation Solution
An induction heating cooktop design featuring a cover plate with a working coil and a thin film composed of multiple sub-films arranged radially, which forms an equivalent circuit including resistance and inductor components to heat both magnetic and nonmagnetic objects, reducing thermal deformation by minimizing temperature differences across the thin film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single thin film is used for heating, then the structure is simple, but thermal deformation occurs due to temperature differences
Solution Approach 1:
The thin film is divided into multiple sub-films (first sub-film, second sub-film, etc.) arranged in parallel. Each sub-film is independently heated by corresponding working coils, which distributes the thermal load and reduces temperature differences across the thin film structure, thereby minimizing thermal deformation while maintaining heating functionality.
2Adaptability or versatility
If a heating plate is added to heat nonmagnetic objects, then heating capability is improved, but heating efficiency decreases and cooking time increases
Solution Approach 1:
The thin film structure serves multiple functions: it acts as both a protective layer and a heating element. The working coils directly induce eddy currents in the thin film, which generates heat to warm both magnetic and nonmagnetic objects simultaneously, eliminating the need for separate heating plates and improving overall heating efficiency.
3Adaptability or versatility
If radiant heater is used for hybrid cooking, then magnetic objects can be heated, but output and heating efficiency are low
Solution Approach 1:
The invention replaces traditional radiant heater mechanisms with electromagnetic induction technology. Working coils generate oscillating magnetic fields that directly induce eddy currents in the thin film and target objects, converting electromagnetic energy directly into heat with much higher efficiency and power output compared to conventional radiant heating methods.
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 efficient heating of both magnetic and nonmagnetic objects with improved durability and reduced material costs, as well as minimizing thermal deformation and damage to the thin film.
Implementation Method 1
In the induction heating method, a target heating object may be heated by an eddy current generated in the target heating object made of a metal material using an electrical field that is generated around a coil when a high frequency power having a predetermined magnitude is applied to the coil
Implementation Method 2
a target heating object may be heated by an eddy current generated in the target heating object made of a metal material using an electrical field that is generated around a coil
Implementation Method 3
a target heating object may be heated by heat that is generated when a current flows in a metal resistance wire
Data Source
AI summary
An induction heating type cooktop includes a cover plate that is coupled to a top of a case and that includes an upper plate configured to seat an object to be heated, a working coil disposed inside the case and configured to heat the object, an insulator disposed between a bottom surface of the upper plate and the working coil, and a thin film that is disposed on at least one of a top surface of the upper plate or the bottom surface of the upper plate and that includes a plurality of sub-films that are arranged about a central portion of the thin film. An outer boundary of one of the plurality of sub-films is positioned radially outward of an outer boundary of another of the plurality of sub-films relative to the central portion of the thin film.