Glass composition and cooking appliance
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Solution Overview
Problem
Cooking appliances require a glass composition that enhances cleaning performance, heat resistance, chemical resistance, and abrasion resistance to effectively remove food residues and contaminants, especially when exposed to high temperatures and alkaline detergents.
Innovation Solution
A glass composition comprising P2O5, SiO2, B2O3, Al2O3, ZrO2, and a group I-based oxide, with specific weight percentages, which improves cleanability, heat resistance, and chemical resistance, allowing for easy cleaning with water-soaking and minimizing energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If traditional enamel is used in cooking appliances, then the appliance can withstand high temperatures, but the cleaning process requires high energy consumption and strong alkaline detergents
Solution Approach 1:
The patent modifies the chemical composition parameters of the glass enamel by incorporating specific amounts of PbO (20-40 wt%), B2O3 (10-30 wt%), and other oxides in controlled proportions. These parameter changes create an enamel surface with improved hydrophilicity and reduced surface energy, enabling contaminants to be removed more easily with water or mild detergents, thereby reducing cleaning energy consumption while maintaining cleaning effectiveness
Solution Approach 2:
The patent creates a composite glass enamel material combining multiple oxide components (PbO, B2O3, SiO2, Al2O3, ZrO2, TiO2) with specific weight ratios. This composite structure provides synergistic effects where PbO and B2O3 contribute to low-temperature firing and surface smoothness, while SiO2 and Al2O3 provide structural stability and heat resistance, achieving both easy cleanability and high-temperature withstand capability
2Reliability
If high-temperature pyrolysis method is used to clean enamel, then contaminants are effectively removed, but the enamel requires high heat resistance which increases manufacturing complexity
Solution Approach 1:
The patent designs the glass enamel composition to inherently possess anti-contamination properties through its chemical structure. The specific combination of PbO, B2O3, and other oxides creates a surface that resists adhesion of food residues and organic substances during normal cooking operations. This self-service characteristic reduces the need for aggressive pyrolysis cleaning, allowing the enamel to maintain its properties without requiring excessively high heat resistance or complex compositions
Solution Approach 2:
The patent optimizes the weight percentage parameters of each oxide component within specific ranges (PbO: 20-40%, B2O3: 10-30%, SiO2: 10-30%, Al2O3: 5-20%, ZrO2: 0-10%, TiO2: 0-10%). These controlled parameter changes achieve the right balance between surface properties for easy cleaning and structural properties for heat resistance, avoiding the need for extreme compositions or overly complex manufacturing processes
3Reliability
If strong alkaline detergents are used for cleaning, then food residues are removed effectively, but the enamel requires high chemical resistance which complicates material selection
Solution Approach 1:
The patent adjusts the chemical composition parameters to create an enamel surface with specific surface energy and hydrophilicity characteristics. The controlled inclusion of PbO (20-40 wt%), B2O3 (10-30 wt%), and other oxides creates a chemically inert yet easily cleanable surface that resists degradation from both strong alkaline detergents and mild cleaning agents, providing versatility in cleaning agent selection while maintaining effective cleaning performance
Solution Approach 2:
The patent develops a composite glass enamel system where multiple oxide components work synergistically: PbO and B2O3 provide surface smoothness and chemical inertness, SiO2 and Al2O3 provide structural stability and chemical resistance, while ZrO2 and TiO2 enhance surface durability. This composite structure enables the enamel to withstand various cleaning agents including strong alkaline detergents without degradation, while still allowing effective removal of food residues
Data Source
AI summary
Provided is a glass composition comprising a glass frit containing P2O5, SiO2, B2O3, Al2O3, ZrO2 and a group I-based oxide, wherein the P2O5 is contained in an amount of 10 to 30% by weight based on a total weight of the glass frit, wherein the SiO2 is contained in an amount of 20 to 40% by weight based on the total weight of the glass frit, wherein the B2O3 is contained in an amount of 5 wt % to 18 wt % based on the total weight of the glass frit, wherein the Al2O3 is contained in an amount of 15 to 30% by weight based on the total weight of the glass frit, wherein the ZrO2 is contained in an amount of 1 wt % to 8 wt % based on the total weight of the glass frit, wherein the Group I-based oxide is contained in an amount of 15 to 30% by weight based on the total weight of the glass frit.