Modular Double-Wall Grill Structure for Stable Portable Combustion
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Solution Overview
Problem
Conventional grills face issues such as low portability, poor combustion performance, short service life, safety risks, contamination, and aesthetic degradation due to top-heaviness, heat exposure, and inadequate airflow, leading to improper cooking and fire hazards.
Innovation Solution
A packable modular combustion grill design featuring a doubled-walled body with a hinged grill grate, a grill stand with removable legs, and fuel packs with pre-measured combustible materials and fire lighters, allowing for efficient and safe outdoor cooking with improved airflow and heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cooking surface is positioned at accessible height above the ground, then ease of operation is improved, but stability deteriorates causing the grill to fall over easily
Solution Approach 1:
The patent positions heavy components (fuel chamber, ash pan, water reservoir) at the bottom of the grill body below the cooking surface. This creates a counterweight effect that lowers the center of gravity, preventing the grill from tipping over while maintaining waist-high cooking surface accessibility.
2Reliability
If the grill body is made robust to withstand heat and weathering, then reliability is improved, but portability deteriorates
Solution Approach 1:
The patent divides the grill into modular components: a main body (kettle) containing heat-resistant materials for durability, a separate removable stand with legs for portability, and detachable accessories (grates, lids). This segmentation allows the heavy durable body to be separated from the portable stand, enabling both robust construction and easy transport.
3Manufacturing precision
If the grill is designed as a single integrated unit, then manufacturing precision is improved, but ease of repair deteriorates
Solution Approach 1:
The patent employs a modular design where the kettle body, stand, grates, and lids are separate replaceable components. This allows individual parts to be easily replaced or maintained without affecting the entire grill structure, significantly improving ease of repair while maintaining precise factory assembly for each module.
4Productivity
If ventilation apertures are added to the grill body, then combustion performance is improved, but fire risk increases
Solution Approach 1:
The patent introduces a mesh screen or grate structure as an intermediary element covering the ventilation apertures. This intermediary allows air to pass through for combustion while preventing direct exposure of flames to the exterior, thereby maintaining combustion efficiency while reducing fire risk to surrounding areas.
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 modular design enhances portability, cooking performance, and safety while extending the grill's service life by providing a stable and controlled cooking environment with reduced risk of fire and contamination.
Implementation Method 1
The doubled-walled body design with a coal grate, a grill grate cooking surface, an ash pan, and a base pan spaced from the ash pan by an air gap
Implementation Method 2
combustible fuel sized to facilitate particular cooking tasks, and one or more fire lighters capable of burning with an open flame
Data Source
AI summary
A grill stove includes a kettle, legs, and a lid. The kettle includes an outer wall with a ventilation aperture, an inner wall, and a top collar extending between the inner wall and the outer wall and connecting the top portion of the outer wall to the top portion of the inner wall to form a dual-walled kettle. A base pan may be attached to the outer wall and may form a bottom of the kettle. A nest pan may have an edge and a ventilation aperture. The edge of the nest pan may be attached to the bottom portion of the inner wall and disposed above the base pan. The nest pan and the base pan being spaced apart to form a gap therebetween. The ventilation aperture of the nest pan may be in fluid communication with the ventilation aperture of the outer wall. An ash pan may be removably positionable above the nest pan.