Graphite Composite Cooking Plate Thermal Response
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Solution Overview
Problem
Current induction cooking systems with aluminum-steel composites face high production costs, poor conductivity, and slow thermal response due to multiple layers and inefficient heat transfer, requiring excessive energy for temperature changes.
Innovation Solution
A composite induction cooking plate with a food-safe stainless steel surface layer bonded to a high thermal conductivity, low thermal capacity carbon-based induction layer (such as graphite) and an insulation layer, directly heated by an induction coil, reducing heat transfer interfaces and improving energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If aluminum-steel composite layers are used in induction cooking systems, then structural stability is provided, but thermal conductivity is poor and thermal response is slow
Solution Approach 1:
The patent applies composite materials by combining graphite (carbon-based material with high thermal conductivity and low thermal capacity) with stainless steel (structural material). This creates a composite plate where the graphite layer provides superior thermal properties while the stainless steel layers provide structural stability and food-safe surface, resolving the contradiction between structural stability and thermal conductivity.
2Strength
If multiple aluminum-steel layers are assembled, then structural integrity is maintained, but production costs increase due to assembly complexity
Solution Approach 1:
The patent uses composite materials where the graphite layer is integrated with stainless steel layers in a simplified structure. This reduces the number of separate components and assembly steps compared to traditional multi-layer aluminum-steel composites, thereby maintaining structural integrity while reducing production costs.
3Ease of manufacture
If traditional aluminum-steel composites are used, then manufacturing is established, but thermal response time is slow due to high thermal capacity
Solution Approach 1:
The patent changes the material parameter by substituting aluminum with graphite in the composite structure. Graphite has low thermal capacity compared to aluminum, which enables faster thermal response time while maintaining manufacturability through established composite material fabrication techniques.
4Power
If induction heater heats through multiple stainless steel and aluminum layers, then heating function is achieved, but energy consumption increases due to multiple heat transfer interfaces
Solution Approach 1:
The patent uses a composite structure with graphite layer positioned between stainless steel layers, creating fewer and more efficient heat transfer interfaces. Graphite's high thermal conductivity enables more direct and efficient heat transfer from the induction heater to the cooking surface, reducing energy loss compared to traditional aluminum-steel multi-layer composites.
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 efficient temperature control and quick response to cooking temperature changes with reduced energy consumption and production costs, leveraging the high conductivity and thermal shock resistance of graphite for improved heat transfer and stability.
Implementation Method 1
In induction heating or cooking devices, an induction coil heats a material
Implementation Method 2
an induction coil heats a material
Implementation Method 3
a very high thermal conductivity, low thermal capacity carbon-based induction layer, such as graphite
Data Source
AI summary
A thermal composite which can be used in induction heating or cooking devices. The composite comprises a surface layer made of a food-safe material, an induction layer made of a carbon-based material, an insulation layer, and an induction heating element. The heating element heats the induction layer directly, through the insulation layer, which in turn heats the surface layer. There can also be a structural support layer between the insulation layer and the heating element.