Kettle Grill Wall-Positioned Air Intakes for Uniform Charcoal Burning
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Solution Overview
Problem
Kettle-type outdoor grills with charcoal fuel face issues such as reduced air flow due to wind, leading to uneven charcoal burning, increased cooking time, and inadequate cooking temperatures, resulting in inefficient cooking performance and limited food capacity per charcoal load.
Innovation Solution
The design features a grill with air intake openings positioned around an upwardly extending portion of the outer wall, creating a horizontal flow of air directly into the heating chamber, and optionally includes a baffle ring and double or triple walled construction to enhance air distribution and retention, ensuring consistent airflow and temperature across the charcoal bed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air intake openings are positioned at the bottom of the lower housing, then the grill structure is simple, but wind creates negative pressure that reduces air flow and combustion efficiency
Solution Approach 1:
The air intake openings are repositioned from the bottom surface to the upwardly extending outer wall (vertical dimension), allowing air to enter horizontally rather than vertically. This dimensional change enables the air intake to be positioned in a location less susceptible to wind-induced negative pressure while maintaining structural simplicity.
Solution Approach 2:
The air intake openings are positioned at a specific location (upwardly extending outer wall) where local flow conditions are more favorable. This localized positioning creates a region where air can be drawn in more effectively despite windy conditions, improving combustion efficiency without complicating the overall structure.
2Device complexity
If air flows upward through the center of the charcoal bed, then the grill structure is simple, but the charcoal burns unevenly and cooking temperatures are inconsistent
Solution Approach 1:
The air intake is segmented into multiple openings distributed around the upwardly extending outer wall. This segmentation allows air to enter at multiple locations and angles, creating a more distributed airflow pattern through the charcoal bed that promotes uniform burning and consistent cooking temperatures across the cooking surface.
3Quantity of substance
If standard charcoal loads are used in prior art grills, then the charcoal load is sufficient for one batch of food, but cooking times are extended and temperatures are inadequate for proper searing
Solution Approach 1:
The airflow parameters are changed by positioning the air intake openings on the upwardly extending outer wall, which increases the velocity and distribution of air through the charcoal bed. This parameter change accelerates combustion, allowing standard charcoal loads to reach higher temperatures faster and maintain them longer, enabling proper searing and multiple cooking batches.
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 configuration maintains consistent airflow and increased cooking temperatures even in windy conditions, allowing for faster and more efficient cooking with less charcoal, producing attractive sear marks and enabling multiple batches of food to be cooked with a single charcoal load.
Implementation Method 1
air intake openings positioned around an upwardly extending portion of the outer wall, creating a horizontal flow of air directly into the heating chamber
Implementation Method 2
baffle ring and double or triple walled construction to enhance air distribution and retention
Implementation Method 3
burning charcoal or other solid fuel
Implementation Method 4
cooking temperatures produced across the surface of the cooking grate
Implementation Method 5
cook by infrared radiation or convection
Implementation Method 6
double or triple walled construction to enhance air distribution and retention
Data Source
AI summary
A lower housing has a fuel grate situated at a predetermined level within the lower housing for supporting a fuel source. The lower housing has a first wall defining a plurality of air intake openings proximate the level of the fuel grate.