Ceramic Cooking Plate Reinforcement for Induction Heating
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Solution Overview
Problem
Existing induction heating apparatuses face limitations in securing strength and heat-resistant properties in their cooking plates, particularly due to the use of heat-resistant glass which restricts design freedom and mechanical properties.
Innovation Solution
The induction heating apparatus incorporates a sintered ceramic plate material with a thermal expansion coefficient of 10^-6 to 3*10^-6 K^-1, reinforced by a polyamide-based resin and industrial fibers such as aramid, carbon, or glass fibers, to enhance strength and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heat-resistant glass is used as the cooking plate material, then heat resistance is maintained, but mechanical strength and design freedom are limited
Solution Approach 1:
The patent applies composite materials by combining sintered ceramic plate material with a reinforcement material layer containing industrial fibers (aramid, carbon, or glass fibers) and resin. This composite structure achieves both high mechanical strength and design freedom, resolving the contradiction between strength requirements and design flexibility. The ceramic provides heat resistance while the fiber-reinforced layer provides structural strength and allows for varied designs.
2Temperature
If heat-resistant glass is used as the cooking plate material, then heat resistance is maintained, but bending strength and impact resistance are insufficient
Solution Approach 1:
The patent uses a composite structure where the sintered ceramic plate material provides heat resistance while the reinforcement material layer with industrial fibers provides enhanced bending strength and impact resistance. The fiber-reinforced composite effectively addresses the mechanical strength deficiencies of heat-resistant glass while maintaining its heat resistance properties.
3Strength
If a reinforcement material layer with industrial fibers and resin is added to the sintered ceramic plate material, then mechanical strength and heat resistance are improved, but the structure becomes more complex
Solution Approach 1:
The patent addresses structural complexity by adding a reinforcement layer in a new dimension - bonding the fiber-reinforced material to the surface of the sintered ceramic plate. This dimensional approach allows the base ceramic structure to remain relatively simple while the added layer provides enhanced mechanical properties, effectively managing complexity.
4Adaptability or versatility
If sintered ceramic plate material is used instead of heat-resistant glass, then design freedom is increased, but strength and heat-resistant properties need reinforcement
Solution Approach 1:
The patent uses composite materials to enhance the sintered ceramic plate material by adding a reinforcement layer with industrial fibers and resin. This allows the design freedom benefits of ceramic to be realized while compensating for any strength or heat-resistant property deficiencies through the reinforcing composite layer.
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 provides improved bending strength, adhesive force, and impact resistance, allowing for greater design freedom and maintaining high heat resistance, replacing the need for heat-resistant glass.
Implementation Method 1
When the current is applied to the coil to generate the magnetic field, a secondary current is induced in the cooking container, and Joule heat is generated by a resistance component of the cooking container itself
Implementation Method 2
Joule heat is generated by a resistance component of the cooking container itself. Thus, the cooking container is heated by a high-frequency current
Implementation Method 3
The sintered ceramic plate material may be provided by mixing clay with Li2O-Al2O3-SiO2 (LAS) or MgO-Al2O3-SiO2 (MAS)... The sintering temperature may be in the range of 1,000°C to 1,300°C
Data Source
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AI summary
An induction heating apparatus is disclosed. The disclosed induction heating apparatus includes: a cooking plate on which a cooking container is seated; and a plurality of induction heating coils installed below the cooking plate and configured to generate a magnetic field, wherein the cooking plate includes: a sintered ceramic plate material; and a reinforcement material layer disposed on a lower surface of the sintered ceramic plate material and provided by a fabric woven with an industrial fiber and a polyamide-based resin.