Combustible Fuel Pack With Integrated Accelerant for Easy Fire Pit Ignition
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Solution Overview
Problem
Existing fire pits face challenges with inconsistent fuel quality, improper fuel stacking, the need for separate accelerants or fire starters, and the requirement for ongoing fire adjustment, especially when using unsuitable wood or green wood.
Innovation Solution
A single-use fuel pack containing hardwood pellets with a hydrotreated light distillate accelerant, wrapped in a combustible paper layer backed by a polymer liner, designed for easy ignition and controlled combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If separate accelerants or fire starters are used to achieve adequate burn quickly, then ignition speed is improved, but device complexity and user operation complexity increase
Solution Approach 1:
The patent combines the fuel pellets, accelerant, and ignition source into a single integrated fuel pack. The accelerant is applied to the fuel pellets during manufacturing, and the outer wrapper contains both components in a pre-assembled unit, eliminating the need for separate accelerant bottles or fire starters.
Solution Approach 2:
The accelerant is pre-applied to the fuel pellets during the manufacturing process, and the fuel pack is pre-assembled with all necessary components (fuel, accelerant, wrapper) before use. This preliminary preparation eliminates the need for users to perform additional actions during ignition.
2Reliability
If fuel is stacked incorrectly or green wood is used, then fire performance deteriorates, but the skill requirement and selection complexity increase for the user
Solution Approach 1:
The fuel pack is designed to be self-contained and self-sufficient, requiring no user skill for proper stacking or fuel selection. The pellets are uniformly manufactured with consistent size and composition, and the accelerant is pre-applied, allowing the pack to perform reliably regardless of user expertise.
Solution Approach 2:
The patent specifies controlled parameters for the fuel pellets including moisture content of less than 8.0%, ash content of less than 1%, and bulk density between 40-46 lbs/ft3. These parameter controls ensure consistent combustion performance and eliminate variability associated with user fuel selection.
3Ease of operation
If the outer wrapper is designed to be ignitable to instigate combustion, then ease of ignition is improved, but safety concerns may arise from uncontrolled burning
Solution Approach 1:
The outer wrapper is designed with specific local properties: it is ignitable to initiate combustion but contains structural features (paper layer backed by polymer liner) that control the burning rate and pattern. The wrapper burns in a controlled manner rather than exploding or burning uncontrollably.
Solution Approach 2:
The outer wrapper uses a composite structure with a paper outer layer and polymer liner backing. This composite material provides both ignitability (from the paper) and controlled combustion characteristics (from the polymer layer), balancing ease of ignition with 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
Provides a reliable, low-smoke, and long-lasting fire with minimal user intervention, ensuring consistent ignition and burn time without the need for additional starters, suitable for outdoor fire pits.
Implementation Method 1
The outer wrapper is ignitable to instigate combustion of the fuel pack such that substantially all of the quantity of fuel pellets and all of the outer wrapper burn in a controlled manner
Implementation Method 2
The fuel pellets comprise a hardwood with an accelerant. The accelerant may comprise hydrotreated light distillate
Data Source
AI summary
An outer wrapper has an outer layer and liner and arranged to form an interior volume. A quantity of fuel pellets is contained within the interior volume and faced by the liner. When ignited the outer wrapper burns away while igniting the quantity of fuel pellets.