System and method for improving charcoal combustion for cooking
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Solution Overview
Problem
Portable charcoal grills inefficiently direct radiant energy away from food due to bottom combustion of charcoal, leading to uneven heat distribution and flare-ups, which result in less efficient cooking and ash contamination.
Innovation Solution
A charcoal pan with air diffusers that transport air from underneath the charcoal bed to above, allowing the charcoal to burn from the top, reducing radiant energy loss and flare-ups by directing heat more evenly towards the food.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If air is admitted to the charcoal bed from below, then combustion is sustained, but radiant energy is directed downward away from the food and heat distribution becomes uneven
Solution Approach 1:
The patent inverts the conventional air delivery approach by delivering combustion air from above the charcoal bed instead of from below. This reversal changes the combustion pattern so that heat is generated from the top down, directing radiant energy toward the food rather than away from it, thereby resolving the energy loss problem without requiring complex structural modifications
Solution Approach 2:
The patent introduces a vertical dimension to air delivery by using downward-facing openings in the charcoal support surface. This dimensional change allows air to be introduced from the top surface level rather than from below, fundamentally altering the combustion geometry and heat radiation pattern to improve cooking efficiency
2Reliability
If air is entrained from below the charcoal bed, then combustion is enhanced, but local high air velocities create small flames that cause flare-ups
Solution Approach 1:
By inverting the air delivery direction to supply air from above rather than below, the patent eliminates the bellows effect that creates high-velocity upward air currents. This reversal stabilizes combustion by preventing the formation of small, erratic flames that cause flare-ups, while maintaining reliable burning through controlled air delivery via downward-facing openings
3Object-affected harmful factors
If the charcoal bed is located spaced far apart from the cooking grate to avoid flare-ups, then safety is improved, but cooking efficiency decreases with limited sear marks
Solution Approach 1:
The inverted air delivery system from above fundamentally changes the combustion behavior, eliminating flare-ups even when the cooking grate is positioned close to the charcoal bed. This allows the grate to be placed in optimal cooking position for maximum heat transfer and sear mark formation, thereby improving cooking efficiency without compromising safety
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 enhances cooking efficiency by maintaining even heat distribution, reducing ash contamination, and allowing for closer proximity of food to the charcoal bed, resulting in better sear marks and reduced flare-ups.
Implementation Method 1
When air is entrained from below the subsequent thermal draft develops locally high air velocities around the pieces of burning charcoal
Implementation Method 2
during most of the burning life of the piece of charcoal half or more of the released radiant energy is directed downward and away from the food being cooked
Data Source
AI summary
A charcoal pan includes a supporting surface for supporting a quantity of charcoal beneath a cooking grate, and a plurality of diffusers that transport air from underneath the supporting surface to an area above at least a portion of the quantity of charcoal.