Anodized Aluminum Venturi Tube for Stable Gas Burner Performance
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Solution Overview
Problem
Brass venturis used in gas burners for home appliances are prone to discoloration and dimensional instability under high temperatures, making them expensive, heavy, and difficult to machine, while also being difficult to replace without unnecessary expense due to appearance issues.
Innovation Solution
A venturi tube formed from aluminum and subjected to an electrolytic passivation process, specifically anodizing, which provides dimensional stability and a treated surface that maintains appearance under heavy use, with the option of a colorizing process to mimic brass appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If brass is used for venturi, then dimensional stability is achieved, but the material becomes expensive, heavy, and difficult to machine
Solution Approach 1:
The patent changes the material parameters by substituting brass with aluminum, which has different physical properties including lower density and different machinability characteristics. This material substitution resolves the contradiction by achieving dimensional stability through aluminum's inherent properties while dramatically improving ease of manufacture and reducing weight.
Solution Approach 2:
The patent creates a composite structure by applying an anodized coating to aluminum venturi. This composite approach combines the dimensional stability and corrosion resistance of the anodized surface layer with the lightweight and ease of manufacture benefits of the aluminum substrate, effectively resolving the technical contradiction.
2Stability of the object's composition
If brass is used for venturi, then dimensional stability is achieved, but the material becomes expensive and heavy
Solution Approach 1:
The patent changes the material parameters by substituting brass with aluminum, which has approximately one-third the density of brass. This material substitution directly reduces the weight of the venturi while maintaining dimensional stability through the anodized coating, effectively resolving the contradiction between dimensional stability and weight.
3Stability of the object's composition
If brass is used for venturi, then dimensional stability is achieved, but the material becomes expensive
Solution Approach 1:
The patent changes the material parameters by substituting expensive brass with more economical aluminum. This material substitution reduces material costs while maintaining dimensional stability through the anodized coating process, effectively resolving the contradiction between dimensional stability and manufacturing cost.
Solution Approach 2:
The patent employs a more economical material (aluminum) that can be manufactured at lower cost. The anodized coating provides sufficient durability for the application, making the overall component more cost-effective while maintaining the required dimensional stability.
4Ease of manufacture
If aluminum is used for venturi, then ease of manufacture and weight reduction are achieved, but dimensional stability under thermal expansion becomes problematic
Solution Approach 1:
The patent applies an anodized coating to the aluminum venturi, which creates a surface layer with different thermal expansion characteristics. This surface treatment helps compensate for aluminum's higher thermal expansion coefficient, maintaining dimensional stability under thermal conditions while preserving the ease of manufacture and weight benefits of aluminum.
Solution Approach 2:
The patent creates a composite structure with the anodized aluminum venturi, where the anodized surface layer provides dimensional stability under thermal conditions while the aluminum substrate provides ease of manufacture and weight reduction. This composite approach resolves the contradiction between ease of manufacture and dimensional stability.
5Duration of action of stationary object
If traditional venturi material is used, then initial appearance is acceptable, but appearance deteriorates under heavy use
Solution Approach 1:
The patent applies an anodized coating to the aluminum venturi, which fundamentally changes the surface properties. This anodized surface is highly resistant to discoloration and corrosion, maintaining appearance under heavy use while extending service life, effectively resolving the contradiction between service life and appearance deterioration.
Solution Approach 2:
The patent employs a cost-effective aluminum substrate with an anodized coating that provides superior appearance retention compared to traditional brass. The anodized surface protects against discoloration, extending the aesthetic service life without requiring expensive materials.
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 aluminum venturi maintains critical dimensions within tolerance, withstands thermal expansion, and maintains appearance, extending the burner's performance life and simplifying venturi detection, while being more cost-effective and lighter than brass.
Implementation Method 1
The venturi tube is formed from a material subjected to an electrolytic passivation process. Preferably, the electrolytic passivation process is an anodizing process.
Implementation Method 2
Within the venturi bore, the velocity of the fluid increases as the cross section of the bore decreases, with the static pressure correspondingly decreasing. As the gas/air mixture go through the constriction, the gas/air mixture accelerates and the pressure is reduced at the constriction
Data Source
AI summary
A home appliance having an improved burner including an appliance body; at least one burner assembly supported in the appliance body to provide a heat source, the burner assembly including a burner head, an electrode and a venturi tube for mixing gas and air and directing the resultant gas and air mixture to the burner head for ignition by the electrode and flame output through the burner head, the venturi tube being formed from a material subjected to an electrolytic passivation process, preferably an anodizing process.