Gravity-Fed Smoker with External Stack for Continuous Fuel Supply
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Solution Overview
Problem
Traditional smokers require frequent opening of the lid to replenish fuel and remove ashes, leading to smoke escape and temperature disruptions during extended smoking processes.
Innovation Solution
A gravity-fed smoker design with an external stack and fan system that allows fuel replenishment and ash removal without opening the smoking enclosure, using a feed hopper, fire box, and ash pan to maintain combustion and control smoke distribution, while a fan and damper system regulates air flow for consistent temperature and flavor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the lid is opened periodically to replenish fuel and remove ashes, then the fuel can be renewed and ashes removed, but smoke escapes and temperature is disrupted
Solution Approach 1:
The fuel management system is segmented into separate components: an external hopper for fuel storage and an internal firebox for combustion. This allows fuel replenishment through the hopper without opening the smoking chamber lid, maintaining temperature stability while ensuring continuous fuel supply.
Solution Approach 2:
An intermediary ash pan is introduced between the firebox and the exterior. The ash pan can be removed and emptied without opening the smoking chamber lid, allowing ash removal while maintaining the sealed environment and preventing smoke escape and temperature disruption.
2Ease of operation
If the lid is opened periodically to replenish fuel and remove ashes, then the fuel can be renewed and ashes removed, but smoke escapes
Solution Approach 1:
The system separates fuel storage (external hopper) from combustion (internal firebox), enabling fuel replenishment through the hopper without opening the smoking chamber. This maintains the sealed environment, preventing smoke escape while ensuring easy fuel replenishment.
Solution Approach 2:
The gravity-fed hopper system automatically feeds fuel to the firebox without requiring manual intervention or lid opening. The system serves itself by utilizing gravity to move fuel from the hopper to the firebox, maintaining ease of operation while preventing smoke escape.
3Device complexity
If manual intervention is required to replenish fuel and remove ashes, then fuel management is simple, but time is lost and temperature stability is compromised
Solution Approach 1:
The fuel management system is divided into an external hopper and internal firebox, enabling continuous operation without opening the lid. This segmentation allows fuel replenishment and ash removal to occur independently of the smoking process, eliminating time loss while maintaining reasonable device complexity.
Solution Approach 2:
The gravity-fed hopper system ensures continuous fuel supply to the firebox throughout the smoking process. This continuous action eliminates interruptions and time loss associated with periodic manual fuel replenishment, while the simple gravity-based mechanism keeps device complexity manageable.
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
Enables continuous smoking without disrupting the temperature or smoke, allowing for precise temperature control and efficient fuel usage by maintaining combustion within the sealed system, ensuring consistent flavor and reducing manual intervention.
Implementation Method 1
A fan with a fan outlet is connected to the fire box below the fire grate. In a first embodiment, the amount of air delivered by the fan to the fire grate can be controlled manually or automatically
Implementation Method 2
The inner chamber also includes a feed hopper for containing solid fuel, such as charcoal, lump coal, or wood pellets. The feed hopper is positioned above and connected to the top of the fire box.
Implementation Method 3
The fire box has a smoke outlet that connects to the smoke inlet of the smoke tunnel. The fire box is positioned near the bottom of the inner chamber of the external stack and adjacent an inlet opening of a smoke tunnel positioned along the bottom of the food smoking enclosure.
Data Source
AI summary
A gravity fed smoker includes a smoking enclosure and an external stack. The stack is double walled with an inner wall, and an outer wall. A vented cooling space exists between the inner wall and the outer wall. An inner chamber of the external stack includes a fire box with a fire grate and a feed hopper positioned above the fire box. A smoke tunnel with a series of openings for releasing smoke into the smoking enclosure extends along the bottom of the food smoking enclosure and is connected to the external fire box at one end. Fuel, including charcoal, lump coal, or wood pellets, is loaded into the feed hopper. As the fuel burns on the fire grate and turns to ashes, the fuel is fed from the hopper onto the fire grate by gravity. A fan and dampers controls air flow through the fire grate and into the smoke tunnel.