Multilayer cooking vessel that can be heated by induction
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Solution Overview
Problem
Existing multilayer cooking supports for induction heating are expensive due to the use of stainless steel and complex manufacturing processes.
Innovation Solution
A multilayer cooking support structure using a ferromagnetic carbon steel layer with a protective electrolytic nickel coating, combined with a thermal diffusion layer of aluminum, to reduce costs and maintain electromagnetic coupling, while improving thermal homogeneity and corrosion protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stainless steel layers are used in the multilayer cooking support, then corrosion protection and electromagnetic coupling are maintained, but production cost increases
Solution Approach 1:
The patent replaces expensive stainless steel with a cheaper ferromagnetic material layer that provides the necessary electromagnetic coupling for induction heating. The ferromagnetic layer is protected by nickel coatings on both sides, eliminating the need for expensive stainless steel while maintaining functionality and corrosion resistance.
Solution Approach 2:
The patent creates a composite structure consisting of a ferromagnetic material layer sandwiched between two nickel protective layers. This composite design combines the electromagnetic properties of ferromagnetic materials with the corrosion resistance of nickel, achieving both goals without using expensive stainless steel.
2Stability of the object's composition
If the thermal diffusion layer thickness is increased, then thermal homogeneity is improved, but production cost and device weight increase
Solution Approach 1:
The patent specifies an optimized thickness range for the thermal diffusion layer (0.5-6 mm, preferably 1-1.5 mm) that achieves sufficient thermal homogeneity across the cooking surface while controlling material costs and device weight. This parameter optimization balances performance with manufacturing economy.
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 significantly reduces production costs and enhances thermal homogeneity and corrosion protection, making the cooking support more economical and effective for induction heating.
Implementation Method 1
the protective metal layer is formed by an electrolytic nickel coating
Implementation Method 2
Due to the ferromagnetic nature of nickel, the thickness of the protective metal layer can be thicker with an electrolytic nickel coating than with an aluminum foil
Implementation Method 3
a cooking support forming a cooking container and having an upper cooking face and a lower heating face intended to be heated by resting on an induction heating zone
Implementation Method 4
The thermal diffusion layer has a thickness greater than that of the layer of ferromagnetic material, which makes it possible to produce a high thermal homogeneity on the upper cooking face
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention concerns a cooking vessel (1) that can be heated by induction, having a top cooking face (2) and a bottom heating face (3), the cooking vessel (1) comprising a colaminated structure comprising a thermal diffusion layer (11), which can be coated if required, to form the top cooking face (2), and a layer of ferromagnetic material (12). According to the invention, the layer of ferromagnetic material (12) is made from non-stainless steel, and the colaminated structure comprises a protective metal layer (13) covering the layer of ferromagnetic material (12) on the side opposite the thermal diffusion layer (11). The invention also concerns a culinary article, an electric cooking appliance and a method for obtaining a multilayer cooking vessel.