Negative Draft Inducing Device for Offset Smokers
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Solution Overview
Problem
Existing smokers lack an efficient device to induce a negative draft across the firebox and cooking area, leading to uneven cooking and potential over-smoking, which results in the accumulation of harmful carcinogens.
Innovation Solution
A portable negative draft inducing device that magnetically attaches to smokers, creating a controlled negative airflow by regulating oxygen levels and temperature, using a variable speed fan and magnetic fasteners for secure attachment, and capable of operating on both AC and DC power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a uniform air flow is used to improve heat distribution, then heat distribution is improved, but this creates excess oxygen and produces a negative draft that may lead to uneven cooking and over-smoking
Solution Approach 1:
The device changes the air flow parameters by introducing a variable speed fan that can adjust airflow rate, and a damper mechanism that controls air intake. This allows optimization of oxygen levels to prevent over-smoking while maintaining adequate heat distribution through controlled air flow patterns.
Solution Approach 2:
The device incorporates a temperature sensor and controller that provides feedback to adjust the fan speed and damper position. This feedback mechanism ensures that oxygen levels and temperature remain within optimal ranges, preventing both under-cooking and over-smoking conditions.
2Productivity
If a fan is used to generate air flow, then air flow is created, but the fan structure and operation add complexity to the smoker system
Solution Approach 1:
The invention extracts the air flow generation function from a complex fan system and implements it through a simpler variable speed fan mechanism integrated with a damper. This extraction reduces the overall system complexity while maintaining effective air flow control for preventing over-smoking.
Solution Approach 2:
The variable speed fan serves multiple functions: it controls air flow rate, regulates oxygen levels, and works in conjunction with the damper to optimize cooking conditions. This multi-functionality reduces the need for separate dedicated components, thereby reducing system complexity.
3Ease of operation
If the device is made portable and attachable, then ease of use is improved, but the attachment mechanism must be secure enough to withstand cooking conditions
Solution Approach 1:
The invention replaces traditional mechanical fastening systems with a magnetic attachment mechanism. This substitution provides secure attachment that can withstand cooking temperatures and vibrations while maintaining ease of installation and removal for portable use.
Solution Approach 2:
The magnetic attachment mechanism utilizes changes in magnetic field strength under different conditions to ensure reliable attachment. The magnetic force is sufficient to hold the device securely during cooking while allowing easy detachment when needed, balancing reliability with portability.
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 device ensures uniform and efficient cooking by increasing oxygen flow, reducing carbon dioxide, and minimizing the formation of harmful compounds, while being compatible with various smokers and energy-efficient.
Implementation Method 1
The fan has rotatable fan blades that turn and push air in one direction, creating a downdraft and also capable of creating a cooling effect
Implementation Method 2
The device also attaches to air registers in the smoker through magnetic fasteners
Implementation Method 3
the negative draft forces the warmer air to rise through the upper exhaust from the cooking area
Data Source
AI summary
A negative draft inducing device for a smoker that induces a negative draft through an offset smoker. The negative draft is provided by means of a relatively small portable device which may readily be secured to the smoker when needed and readily released therefrom for storage when not in use. The device not only maintains a fire in the smoker, but also creates a negative flow of warm air through the smoker. The device includes a housing having an intake end and an output end. A fan inside the housing creates air flow from the intake end to the output rend. The housing attaches to a lower portion of the smoker, aligning with air registers. The air flow creates a negative draft across the smoker that maintains a fire in the lower portion and creates a uniform air flow over the smoked food and out the exhaust.