Induction heating type cooktop having improved use convenience
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Solution Overview
Problem
Induction heating cooktops are limited in their ability to efficiently heat both magnetic and non-magnetic materials, often requiring separate heating methods or devices, which can be inconvenient and less efficient.
Innovation Solution
An induction heating cooktop design that includes a working coil and a thin film on the upper plate, allowing the coil to directly heat magnetic objects and indirectly heat non-magnetic objects through the thin film, which is inductively heated by the coil, enabling efficient heating of both types of materials with a single heat source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a heating plate is added to enable heating of non-magnetic materials, then heating versatility is improved, but device complexity increases and heating efficiency decreases
Solution Approach 1:
The thin film layer is designed to serve dual functions: it acts as a heating element when non-magnetic cookware is detected, and as a thermal insulator when magnetic cookware is present. This allows a single component to adapt its function based on the detected cookware type, eliminating the need for separate heating systems for magnetic and non-magnetic materials.
Solution Approach 2:
The thin film serves as an intermediary between the induction heating system and non-magnetic cookware. When non-magnetic cookware is detected, the thin film converts electromagnetic energy to thermal energy through resistive heating, transferring heat to the cookware. This intermediary mechanism enables heating of non-magnetic materials without requiring a completely separate heating system.
2Adaptability or versatility
If a radiant heater is used to heat non-magnetic materials, then heating capability is improved, but heating efficiency deteriorates
Solution Approach 1:
The system dynamically changes the electrical resistance parameter of the thin film based on the detected cookware type. When non-magnetic cookware is present, the thin film's resistance is optimized for resistive heating to efficiently transfer energy. When magnetic cookware is present, the resistance is adjusted to minimize energy loss while maintaining thermal insulation functionality.
3Reliability
If separate heating systems are used for magnetic and non-magnetic materials, then heating effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The heating system transitions from a static configuration to a dynamic one where the thin film's electrical properties are continuously adjusted based on real-time detection of cookware material. The system can switch between induction heating mode (for magnetic materials) and resistive heating mode (for non-magnetic materials) without physical reconfiguration, maintaining heating effectiveness while simplifying the overall device structure.
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 design allows for efficient heating of both magnetic and non-magnetic materials with improved convenience, as users can place objects without considering their material type, and reduces the need for additional heating elements, enhancing heating efficiency and cost-effectiveness.
Implementation Method 1
In the induction heating method, eddy current may be generated in the object made of metal based on a magnetic field generated, around the coil, when a high-frequency power of a predetermined magnitude is applied to the coil to heat the object.
Implementation Method 2
eddy current may be generated in the object made of metal based on a magnetic field generated, around the coil
Implementation Method 3
In the electrical resistive method, heat may be generated based on current flowing through a metal resistance wire or a non-metallic heating element
Implementation Method 4
a thermal insulating member disposed vertically between a lower surface of the upper plate and the working coil
Data Source
AI summary
An induction heating type cooktop includes a case, a cover plate that is coupled to an upper end of the case and that includes an upper plate configured to seat an object on an upper surface of the upper plate, a working coil disposed in the case and configured to heat the object, a thin film attached on the upper plate, and a thermal insulating member disposed vertically between a lower surface of the upper plate and the working coil.