Anodized Aluminum-Clad Copper Cookware for Durable Heat Transfer
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Solution Overview
Problem
Copper cookware faces issues with durability, maintenance, and thermal performance due to the wear-off of tin coatings and the poor heat conductivity of stainless steel claddings, which also complicate and expense fabrication processes.
Innovation Solution
A cookware design featuring a copper core surrounded by anodized aluminum cladding layers on both sides, with a scratch-resistant alumina coating and a non-stick coating applied on the interior, improving durability and thermal performance while simplifying fabrication and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tin coating is used on copper cookware, then copper leaching is prevented, but the coating wears off over time and scratches easily
Solution Approach 1:
The patent changes the material parameter from soft tin to hard anodized aluminum oxide coating, fundamentally altering the coating's mechanical properties to achieve scratch resistance and extended service life while maintaining copper's thermal performance
Solution Approach 2:
The patent creates a composite structure with copper core clad with aluminum layers, where the aluminum is anodized to form a durable oxide coating. This composite approach combines the thermal conductivity of copper with the durability of anodized aluminum, resolving the contradiction between coating protection and durability
2Reliability
If stainless steel cladding is used on copper, then durability is improved, but heat conduction deteriorates significantly
Solution Approach 1:
The patent changes the cladding material from stainless steel to aluminum, fundamentally altering the thermal conductivity parameter while maintaining durability through anodization. Aluminum provides both the needed durability and superior thermal conductivity compared to stainless steel
Solution Approach 2:
The patent extracts the stainless steel layer from the cladding structure, removing the thermal barrier while retaining durability functions through aluminum anodization. This eliminates the harmful thermal resistance introduced by stainless steel
3Reliability
If multiple layers are used in clad construction, then durability is improved, but fabrication complexity increases and copper core continuity is compromised
Solution Approach 1:
The patent extracts and eliminates the intermediate aluminum extrusion layers and copper perforations from the clad structure, achieving a simpler continuous copper core design that is both durable and easier to fabricate while maintaining thermal performance
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 anodized clad copper cookware achieves enhanced durability, reduced oil usage for non-stick performance, easier cleaning, and improved thermal efficiency compared to stainless steel clad alternatives, with faster heating and consistent temperature distribution.
Implementation Method 1
The outer cladding layers of this cookware vessel being anodized to provide a scratch resistance alumina coating
Implementation Method 2
copper cookware is preferred for its superior heat transfer capabilities
Data Source
AI summary
An article of cookware has a copper core and is surrounded by relatively thinner outer aluminum layers. The outer aluminum layers are preferably anodized to provide a relatively inert hard and scratch resistant durable finish. This anodized finish also readily accepts non-stick finishes.