Gravity-Fed Smoker With External Firebox for Continuous Smoking
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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 solid fuel to be replenished and ashes to be removed without opening the smoking enclosure, using a feed hopper and ash pan to maintain combustion and control air flow for consistent smoke distribution and temperature regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid fuel is positioned inside the food smoking enclosure, then the smoking process can be maintained, but the lid must be opened periodically to replenish fuel and remove ashes, causing smoke escape and temperature disruption
Solution Approach 1:
The smoker is divided into two separate compartments: a fuel chamber and a food smoking enclosure. The fuel chamber can be accessed independently through its own door, allowing fuel replenishment and ash removal without opening the food enclosure lid. This segmentation resolves the contradiction by enabling continuous smoking operation while eliminating the need to open the food enclosure during the process.
2Ease of operation
If the lid is opened to replenish fuel and remove ashes, then fuel management is simplified, but smoke escapes and temperature within the enclosure is disrupted
Solution Approach 1:
By separating the fuel chamber from the food smoking enclosure with independent access doors, the system allows fuel management operations without disrupting the sealed environment of the food enclosure. This maintains stable temperature and prevents smoke escape while simplifying fuel management.
Solution Approach 2:
The smoke tunnel acts as an intermediary channel that directs smoke from the fuel chamber through a controlled path into the food enclosure. This allows smoke to be delivered consistently without requiring the food enclosure lid to be opened, thereby maintaining temperature stability while enabling continuous smoke flow.
3Ease of operation
If the lid is opened frequently during smoking, then fuel can be replenished and ashes removed, but the smoking process efficiency is reduced due to heat loss and smoke escape
Solution Approach 1:
The dual-chamber design with independent access allows fuel replenishment and ash removal to occur in the fuel chamber without affecting the food smoking enclosure. This eliminates heat loss and smoke escape associated with opening the food enclosure lid, thereby maintaining smoking efficiency while enabling continuous fuel management.
Solution Approach 2:
The gravity-fed fuel delivery system and smoke tunnel design enable continuous smoke generation and delivery to the food enclosure without interruption. Fuel automatically feeds from the hopper to the burn chamber, and smoke flows continuously through the tunnel, maintaining productive smoking action without requiring lid openings.
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, conserving fuel by automatically controlling air flow and extinguishing the fire after cooking, ensuring consistent flavor and efficient operation.
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
A series of openings in the sides of the smoke tunnel extend along the length of the smoke tunnel to allow smoke and heat to flow from the smoke inlet of the smoke tunnel into the food smoking enclosure
Implementation Method 3
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
Data Source
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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 bums 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.