Modular Fire Pit Ash Receptacle for Portable Clean Combustion
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Solution Overview
Problem
Existing outdoor fire pits are often permanent, heavy, and lack portability, with combustion issues resulting in smoky fires and undesirable combustion byproducts like ash, which are difficult to manage.
Innovation Solution
A modular fire pit design featuring a separable upper and lower portion, where the upper portion has a combustion chamber with a fuel grate and the lower portion includes an ash receptacle, allowing for efficient ash collection and improved airflow to enhance combustion efficiency and reduce smoke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire pits are made permanent and heavy (built from rock, concrete, metals), then fire containment and structural stability are improved, but portability deteriorates
Solution Approach 1:
The fire pit is divided into separable components including a removable upper portion with combustion chamber and a lower portion with ash receptacle. This segmentation allows the fire pit to maintain structural integrity during use while enabling easy disassembly for portability and ash disposal.
Solution Approach 2:
The fire pit transitions from a static permanent structure to a dynamic portable system with movable parts. The separable design allows the fire pit to be assembled for use and disassembled for relocation, adapting between fixed and mobile states as needed.
2Ease of operation
If fire pits are made portable, then ease of relocation is improved, but fire containment and combustion efficiency deteriorate
Solution Approach 1:
The portable fire pit uses segmented construction with interlocking components that assemble to form a contained combustion chamber. The separable design maintains fire containment when assembled while enabling portability when disassembled.
3Device complexity
If traditional fire pit designs are used, then simplicity of structure is maintained, but ash management and combustion efficiency worsen
Solution Approach 1:
The fire pit separates the combustion chamber from the ash receptacle into distinct removable portions. This segmentation enables efficient ash disposal while maintaining a relatively simple overall structure that does not require complex mechanisms.
Solution Approach 2:
The ash receptacle is extracted as a separate removable component from the combustion chamber. This extraction allows ash to be easily removed without disturbing the combustion system, improving combustion efficiency while adding minimal structural complexity.
4Device complexity
If combustion byproducts are not properly managed, then device simplicity is maintained, but harmful effects and cleanliness worsen
Solution Approach 1:
The ash receptacle is extracted as a separate removable component that collects combustion byproducts. This extraction isolates ash management from the combustion system, reducing harmful effects while maintaining overall system simplicity.
Solution Approach 2:
The removable ash receptacle enables easy discarding of ash byproducts. Users can simply remove the lower portion and dispose of accumulated ash, maintaining cleanliness without requiring complex ash removal mechanisms.
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 design enables a portable, efficient, and clean-burning fire pit that effectively contains ash and promotes complete combustion, providing better heat radiation and reduced smoke, while allowing for easy ash disposal.
Implementation Method 1
an outer chamber wall spaced apart from and circumscribing the inner chamber wall to define an air flow space between the inner chamber wall and outer chamber wall
Implementation Method 2
ash falling through the fuel grate is received in the ash receptacle
Implementation Method 3
defining a combustion chamber with a fuel grate retained therein
Data Source
AI summary
A fire pit includes an upper portion having an inner chamber wall defining a combustion chamber with a fuel grate retained therein, and a lower portion having a base member defining an ash receptacle. The upper and lower portions separably mate together such that ash falling through the fuel grate is received in the ash receptacle when the upper and lower portions are fitted together.