High-Emissivity Oven Coating for Uniform Baking Heat

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional ovens often experience uneven heat distribution, leading to 'hot spots' and 'cold spots' within the cooking region, resulting in inconsistently cooked food products and increased food loss due to under or overcooking.

Innovation Solution

The application of a high emissivity thermal protective layer on metallic and ceramic surfaces within ovens and cooking accessories, which includes a composition of inorganic adhesive, filler, and emissivity agents, to create a uniform heating environment by enhancing the absorption and emission of infrared radiation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional ovens are used with standard metallic or ceramic surfaces, then the oven structure is simple and easy to manufacture, but uneven heat distribution occurs creating hot spots and cold spots

Engineering Contradiction:

Improveheat distribution uniformityVSAvoidoven surface treatment

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent applies a thermal protective layer with specific emissivity characteristics (0.85-0.95) on oven surfaces to change the thermal radiation parameters. This coating modifies how heat is emitted and distributed, transforming the temperature uniformity parameter without fundamentally changing the oven structure, thereby resolving the contradiction between heat distribution uniformity and device complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite thermal protective layer comprising inorganic binder (20-40 wt%), ceramic powder (50-70 wt%), and metal powder (10-30 wt%). This composite material combines the benefits of high emissivity, thermal protection, and durability, achieving uniform heat distribution while maintaining relatively simple application processes

Inventive Principle:

Principle #40Composite materials

2Manufacturing precision

If longer baking time is used to ensure even cooking in all areas, then food product quality improves, but production efficiency decreases and energy consumption increases

Engineering Contradiction:

Improvecooking uniformityVSAvoidbaking speed

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

By changing the emissivity parameter of oven surfaces through the thermal protective layer, the patent achieves more uniform radiant heat distribution. This allows food to cook evenly across all areas at standard baking speeds, simultaneously improving cooking uniformity and maintaining high productivity without extending baking time

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces mechanical convection-based heat distribution with optimized radiant heat transfer through high-emissivity surfaces. This substitution creates more uniform heating patterns that cook food evenly faster than conventional methods, improving both cooking precision and production efficiency

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Temperature

If conventional oven surfaces are used, then the oven is easy to clean and maintain, but heat reflection and uneven thermal distribution occur

Engineering Contradiction:

Improvethermal radiation efficiencyVSAvoidsurface treatment complexity

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The patent modifies the emissivity parameter of oven surfaces by applying a thermal protective layer with emissivity of 0.85-0.95. This parameter change enhances thermal radiation efficiency and heat distribution uniformity while the layer can be applied through conventional coating methods, maintaining ease of manufacture

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The thermal protective layer can be applied as a relatively simple coating that may be reapplied or replaced without requiring complete oven replacement. This approach achieves improved thermal performance through an economical surface treatment rather than complex structural modifications

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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, reducing baking time and energy consumption while ensuring consistent product quality across batches and within the oven, thereby minimizing food loss and improving production efficiency.

Implementation Method 1

Methodology Applied

Scientific EffectInfrared radiation absorption and emission: Absorption (EM radiation)

Data Source

PatentUS8840942B2Food product and method and apparatus for baking

Publication Date: 2014.09.23 EMISSHIELD INC

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.