High-Emissivity Thermal Coating for Oven Hot Spot Reduction
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Solution Overview
Problem
Conventional ovens often produce uneven heat distribution, leading to inconsistent cooking results and increased food waste due to 'hot spots' and 'cold spots' within the cooking region, despite various efforts to address this issue through rotary supports, temperature monitoring, and thermal property adjustments.
Innovation Solution
The application of a high emissivity thermal protective layer on metallic and ceramic surfaces within ovens and cooking accessories, which enhances heat uniformity by optimizing the emissivity characteristics, thereby creating a more consistent thermal environment for cooking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional heating elements and metal surfaces are used in ovens, then the oven structure is simple and easy to manufacture, but uneven heat distribution occurs creating hot spots and cold spots
Solution Approach 1:
The patent applies emissivity coatings to oven surfaces to change the thermal radiation parameters of the surfaces. By modifying the emissivity characteristics of the oven floor, walls, and heating elements through specialized coatings, the heat distribution uniformity is improved without changing the basic oven structure.
Solution Approach 2:
The patent uses composite material structures combining metal substrates with emissivity coatings. The metal provides structural integrity while the coating layer (containing materials like carbon black, metal oxides, or ceramic particles) provides enhanced thermal radiation properties, creating a composite surface that addresses heat distribution issues.
2Manufacturing precision
If rotary supports, belts, and rollers are used to move cooking products, then heat distribution is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces mechanical systems (rotary supports, belts, rollers) with a thermal field-based solution. Instead of mechanically moving products through complex mechanisms, the invention uses emissivity-modified surfaces to create uniform thermal radiation fields that cook products evenly regardless of their position or movement.
Solution Approach 2:
The emissivity coatings enable the oven surfaces themselves to actively participate in heat distribution. The coated surfaces automatically radiate heat more uniformly throughout the cooking chamber without requiring external mechanical intervention or complex control systems.
3Manufacturing precision
If active temperature monitoring and control systems are implemented, then thermal properties are adjusted to reduce uneven heating, but the device complexity and energy consumption increase
Solution Approach 1:
The patent replaces active electronic control systems with passive thermal radiation optimization. Instead of using sensors, controllers, and active adjustment mechanisms to manage temperature distribution, the invention uses emissivity coatings to passively achieve uniform heat distribution through improved thermal radiation properties of the oven surfaces.
4Manufacturing precision
If high emissivity coatings are applied to oven surfaces, then heat distribution uniformity and cooking consistency are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent focuses on changing the surface properties of existing oven components through coating applications. Rather than redesigning entire oven systems or components, the invention modifies the thermal radiation parameters of existing surfaces through relatively simple coating processes.
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
This solution results in more uniform cooking outcomes, reducing baking time and energy consumption while ensuring that food products are consistently cooked, improving production efficiency and product quality.
Implementation Method 1
The application of a high emissivity thermal protective layer on metallic and ceramic surfaces within ovens and cooking accessories, which enhances heat uniformity by optimizing the emissivity characteristics
Data Source
Figure 1
Figure 2A~2B
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AI summary
Provide an oven and optional cooking accessories having a high emissivity thermal protective layer on a substrate surface which comprises a metal or ceramic. The layer comprises from about 5% to 30% of an inorganic adhesive, from about 45% to 92% of at least one filler, and from about 1% to 25% of one or more emissivity agents; or from about 5% to 35% of colloidal silica, colloidal alumina, or combinations thereof, from about 23% to 79% of at least one filler, and from about 1% to 25% of one or more emissivity agents.