Induction heating type cooktop with output control algorithm based on temperature of multiple components
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Solution Overview
Problem
Existing cooktops using induction heating methods struggle to efficiently heat both magnetic and nonmagnetic objects, often requiring additional heating elements or experiencing low heating efficiency, and can suffer from high material costs and component damage due to excessive temperature increases.
Innovation Solution
An induction heating cooktop with a thin film capable of direct induction heating, combined with temperature sensors and a microcontroller unit (MCU) to control the output of the working coil based on temperature measurements of various components, ensuring efficient heating of both magnetic and nonmagnetic objects while preventing component damage from high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a heating plate is added to enable induction heating of nonmagnetic objects, then heating capability for nonmagnetic objects is improved, but heating efficiency deteriorates and cooking time increases
Solution Approach 1:
The patent combines the radiant heater and working coil into a single integrated heating system. The radiant heater is positioned at the same location where the working coil would be, allowing both magnetic and nonmagnetic objects to be heated through the same heating zone, thereby eliminating the need for separate heating plates and improving overall heating efficiency
Solution Approach 2:
The radiant heater is designed to serve multiple functions: it can heat both magnetic objects (through the working coil) and nonmagnetic objects (through radiant heating), making the heating system universal and adaptable to different cookware materials without requiring additional components
2Productivity
If the thin film is heated to high temperature (e.g., 600°C) for efficient induction heating, then heating efficiency is improved, but component damage risk increases
Solution Approach 1:
The patent employs temperature sensors to continuously monitor the temperature of the thin film and provides feedback to the control unit. Based on this feedback, the control unit dynamically adjusts the output of the working coil to maintain optimal heating efficiency while preventing the thin film from exceeding safe temperature thresholds that could cause component damage
Solution Approach 2:
The heating system transitions from static fixed-output heating to dynamic adaptive heating. The output of the working coil is continuously adjusted based on real-time temperature measurements, allowing the system to optimize heating efficiency at different stages while automatically reducing power when temperature thresholds are approached, thereby protecting components
3Adaptability or versatility
If multiple heating methods (radiant heater and induction) are combined, then versatility is improved, but device complexity increases
Solution Approach 1:
The patent merges the radiant heater and induction heating components into a single integrated assembly. The radiant heater is positioned to coincide with the working coil location, creating a unified heating system that reduces structural complexity compared to having separate, distributed heating elements for different cooking surfaces
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 safety by dynamically controlling the cooktop's output based on temperature measurements, reducing material costs and enhancing user convenience.
Implementation Method 1
a thin film (1020) disposed at least one of a top surface or a bottom surface of the upper plate (1010)... capable of being directly heated through induction heating
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
the at least one temperature sensor may include a thermocouple configured to measure a temperature of the thin film
Implementation Method 4
an insulated gate bipolar transistor (IGBT) disposed between the working coil and a power supply
Data Source
AI summary
An induction heating type cooktop includes a case, an upper plate coupled to a top of the case and configured to support an object, a working coil disposed inside the case and configured to heat the object, a thin film arranged at a top surface of the upper plate or a bottom surface of the upper plate, at least one temperature sensor configured to measure a temperature of at least one of components of the induction heating type cooktop, the components including the thin film, and a microcontroller unit (MCU) configured to drive the working coil and to control an output of the working coil based on whether the temperature satisfies at least one condition that is preset for the at least one of the components.