Induction heating type cooktop
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Solution Overview
Problem
Induction heating cooktops face limitations in heating non-magnetic objects efficiently, as existing solutions either fail to heat the heating plate or conductor above a predetermined temperature, leading to reduced heating efficiency and increased heating time, and lack effective temperature sensing for thin layers heated to high temperatures, risking damage to components.
Innovation Solution
An induction heating cooktop with a thin layer temperature sensor installed under a heat insulator and in a sensor hole, allowing safe monitoring and minimization of measurement errors, and a cooling system to prevent damage from high heat, while maintaining a compact product design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a heating plate is added to enable induction heating of non-magnetic objects, then heating capability is improved, but heating efficiency deteriorates because the heating plate cannot be heated above a predetermined temperature
Solution Approach 1:
A thin layer made of magnetic material is introduced as an intermediary between the induction heating source and the non-magnetic heating plate. This thin layer can be heated to high temperatures through induction heating, and then transfers heat to the heating plate through thermal conduction, enabling the heating plate to reach temperatures above its direct induction heating limit while maintaining overall heating efficiency
2Strength
If the thickness of the electrical conductor is increased to improve heating, then magnetic field penetration is improved, but heating efficiency deteriorates because the magnetic field cannot reach the to-be-heated object
Solution Approach 1:
The thickness of the electrical conductor is optimized to be less than the skin depth of the conductor material. This parameter change allows the magnetic field to penetrate through the conductor and reach the to-be-heated object, enabling direct induction heating while maintaining appropriate current density and heating efficiency
3Reliability
If a temperature sensor is installed to monitor the thin layer temperature, then temperature control is improved, but device complexity increases
Solution Approach 1:
The temperature sensor is nested within the existing heat insulator structure. The heat insulator contains a through-hole that accommodates the temperature sensor, allowing the sensor to monitor the thin layer temperature while being protected from direct exposure to high temperatures. This nesting approach integrates the sensing function into the existing thermal management structure without adding significant complexity
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 non-magnetic objects, minimizes the risk of damage to the upper plate and components, and maintains a compact design by effectively monitoring and managing high temperatures, thus improving heating efficiency and safety.
Implementation Method 1
a working coil WC installed in the case 2; when a current is applied to the working coil WC, a magnetic field is generated
Implementation Method 2
the induction heating method is a method for heating a to-be-heated object itself by generating an eddy current in the to-be-heated object made of a metal component by using magnetic field generated around a coil
Implementation Method 3
a heat insulator 10 provided between the upper plate part 4 and the working coil WC... so as to prevent heat generated while the thin layer TL or the to-be-heated object HO is heated from being transferred to the working coil WC
Implementation Method 4
a thin layer temperature sensor 300 configured to sense a temperature of the thin layer TL... the thin layer temperature sensor 300 may be installed such that a first end 312 of the thin layer temperature sensor 300 contacts the thin layer TL
Implementation Method 5
a working coil cooling fan 90... blowing air toward the working coil WC... to cool the working coil WC
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
The present disclosure relates to an induction heating type cooktop. The induction heating type cooktop includes a case, a cover plate connected to an upper end of the case and provided with an upper plate part on which a to-be-heated object is disposed, a working coil provided inside the case, a thin layer coated on the upper plate part, a heat insulator configured to block heat transfer from the thin layer to the working coil, and a temperature sensor configured to sense a temperature of the thin layer. The heat insulator is provided with at least one sensing hole through which the temperature sensor senses the temperature of the thin layer.