Cooking appliance and method for preparing cooking appliance
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Solution Overview
Problem
Existing non-stick coatings for cooking appliances, such as fluorocarbon and silicon coatings, suffer from low heat conductivity, poor heating efficiency, low heat resistance, and inadequate wear resistance, failing to meet customer expectations for durability and performance.
Innovation Solution
A cooking appliance with a non-stick layer comprising a primer layer of flake-like graphene and/or graphene derivatives, a sealing layer, and a topcoat layer, which enhances heat conduction, mechanical strength, and wear resistance, while maintaining non-stick properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorocarbon coating (PTFE) is used for non-stick properties, then non-stick performance is improved, but heat conductivity is poor (0.25 W/mK) and heating efficiency is low
Solution Approach 1:
The patent applies composite materials by combining PTFE coating with aluminum oxide particles and silicon oxide particles. This composite structure maintains the non-stick properties of PTFE while the metal oxide particles provide enhanced heat conductivity, resolving the contradiction between non-stick performance and heating efficiency
Solution Approach 2:
The patent changes the physical and chemical parameters of the coating by incorporating different concentrations of aluminum oxide (30-70 wt%) and silicon oxide (10-40 wt%) particles. This parameter optimization allows the coating to achieve both good non-stick performance and improved heat conductivity, balancing the conflicting requirements
2Reliability
If fluorocarbon coating (PTFE) is used for non-stick properties, then non-stick performance is improved, but heat resistance is low (long-term service temperature only 250°C)
Solution Approach 1:
The patent uses composite materials combining PTFE with metal oxide particles (aluminum oxide and silicon oxide) that have high heat resistance. This composite structure allows the coating to maintain non-stick performance while achieving higher temperature resistance than pure PTFE
Solution Approach 2:
The patent applies local quality by creating a multi-component coating where different materials serve different functions: PTFE provides non-stick properties while metal oxide particles provide heat resistance and structural stability at high temperatures
3Strength
If silicon coating is used for hardness (8H or above), then surface hardness is improved, but wear resistance and non-stickiness are poor
Solution Approach 1:
The patent applies composite materials by combining PTFE (which provides excellent non-stick properties) with metal oxide particles (which provide hardness). This composite approach allows the coating to achieve both high hardness and good non-stick performance, resolving the contradiction between these two properties
Solution Approach 2:
The patent merges the advantages of different materials: PTFE contributes non-stickiness and flexibility while metal oxide particles contribute hardness and wear resistance. The synergistic combination allows the coating to achieve comprehensive performance that neither material could provide alone
4Reliability
If conventional non-stick coatings are used, then non-stick properties are achieved, but durability and service life are insufficient
Solution Approach 1:
The patent uses composite materials that combine the durability of metal oxide particles with the non-stick properties of PTFE. This creates a more robust coating structure that resists wear and degradation over time, extending service life while maintaining non-stick performance
Solution Approach 2:
The patent incorporates metal oxide particles as a reinforcing framework within the PTFE matrix, providing structural support and protection before wear occurs. This pre-reinforcement structure helps the coating withstand mechanical stress and extend its service life
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 non-stick layer provides high surface hardness, excellent corrosion resistance, durable wear resistance, and long service life, ensuring fast and uniform heat conduction with improved heating efficiency and environmental sustainability.
Implementation Method 1
through graphene and/or graphene derivatives, heat conduction between a body and food is fully realized, and a heating speed and a heating uniformity are effectively improved
Data Source
Figure 1
Figure 2
AI summary
A cooking appliance is provided, and includes a body of the cooking appliance and a non-stick layer coated on a surface of the body. The non-stick layer includes a primer layer which is in contact with a side of the body, and the primer layer includes flake-like graphene and/or graphene derivatives uniformly distributed. A method for preparing the cooking appliance is further provided, and includes follows. A surface of a body of a cooking appliance is roughened. A water-based paint, which includes graphene and/or graphene derivatives and forms a primer layer, is sprayed on the surface of the body; a sealing layer is sprayed on an undried surface of the primer layer; and baking is performed. A midcoat layer and a topcoat layer are sprayed on a surface of the sealing layer in sequence and firing is performed, to obtain the cooking appliance with a target non-stick layer.