Methods and systems for open-loop ignition of a smoke generator fuel source
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Solution Overview
Problem
Existing cooking systems face challenges in controlling smoke output and ensuring optimal ignition of smoke generator fuel sources, leading to inconsistent smoke flavor and quality, due to difficulties in monitoring combustion processes effectively.
Innovation Solution
An open-loop ignition system that determines the required energy for fuel source ignition based on operating mode, ambient conditions, and igniter performance, activating and deactivating the igniter to maintain optimal energy input without real-time feedback, thereby ensuring consistent smoke production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If closed-loop control with sensors is used to detect combustion outputs, then combustion monitoring precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent replaces complex mechanical/sensor-based combustion detection systems with an electrical measurement system. Instead of using sensors to detect heat or combustion products, the system measures electrical parameters (voltage, current, power) of the igniter to indirectly monitor combustion status. This substitution achieves accurate combustion monitoring while avoiding the complexity and cost of high-temperature sensors.
Solution Approach 2:
The patent introduces electrical parameters as an intermediary variable to bridge the gap between igniter operation and combustion state. Rather than directly measuring combustion outputs (heat, smoke, CO2), the system uses electrical measurements during the ignition phase to infer combustion performance. This intermediary approach enables closed-loop control without requiring sensors in the harsh combustion environment.
2Measurement precision
If sensors are placed in the combustion environment for real-time detection, then combustion feedback accuracy is improved, but sensor reliability and safety deteriorate due to harsh operating conditions
Solution Approach 1:
The patent uses electrical parameters as an intermediary measurement that can be obtained without placing sensors in the harsh combustion environment. By measuring voltage, current, and power at the igniter terminals, the system achieves accurate combustion feedback while keeping all measurement points in safe, accessible locations away from high temperatures and combustion products.
Solution Approach 2:
The patent replaces physical sensors that would need to withstand combustion conditions with electrical measurement systems. Instead of using thermocouples, smoke detectors, or CO2 sensors in the combustion zone, the system uses standard electrical measurement circuits to infer combustion state from igniter electrical characteristics, eliminating the reliability issues of in-combustion sensors.
3Reliability
If excessive energy is provided to the fuel source by the igniter, then ignition reliability is improved, but combustion efficiency deteriorates due to oxygen starvation and excessive burning
Solution Approach 1:
The patent implements closed-loop feedback control where the igniter operation is continuously adjusted based on real-time electrical parameter measurements. The system monitors voltage, current, and power during ignition and dynamically adjusts igniter activation to provide exactly the right amount of energy for reliable ignition without excessive energy input. This feedback mechanism prevents both under-ignition and over-ignition, optimizing combustion efficiency while ensuring ignition reliability.
Solution Approach 2:
The patent transitions from static, fixed-duration igniter activation to dynamic, adaptive ignition control. The igniter operation parameters (duration, power level) are continuously adjusted based on real-time electrical measurements and combustion conditions. This dynamic approach allows the system to optimize energy delivery for each ignition event, ensuring reliable ignition while preventing energy waste from excessive burning.
4Loss of energy
If insufficient energy is provided to the fuel source by the igniter, then energy efficiency is improved, but ignition reliability deteriorates due to inadequate ember generation
Solution Approach 1:
The patent uses feedback control to ensure the igniter provides sufficient energy for reliable ignition. By continuously monitoring electrical parameters during the ignition process, the system detects when combustion has been successfully initiated and automatically terminates igniter activation. This prevents premature shutdown that would cause under-ignition while avoiding excessive energy input, achieving both ignition reliability and energy efficiency.
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
This approach provides consistent and reliable ignition performance, optimizing smoke output and flavor without the need for complex closed-loop monitoring, by accounting for variables like ambient temperature and airflow.
Implementation Method 1
The igniter can be an electrical heating element
Implementation Method 2
the fuel source is over-ignited by an igniter, the ignitor can provide an excessive amount of energy to the fuel source, such that there is too much combustion
Data Source
AI summary
In an aspect, data characterizing an instruction for an activation of an igniter and an operating mode of a smoke generator that includes the igniter can be received. A first amount of energy required for an ignition of a fuel source by the igniter can be determined based on the operating mode characterized by the received data. The igniter can be caused to activate based on the received data. A second amount of energy, output by the igniter over a period of time during which the igniter is activated, can be determined. A determination of whether the second amount of energy exceeds the first amount of energy can be made. The igniter can be caused to deactivate in response to a determination that the second amount of energy exceeds the first amount of energy. Related systems, apparatus, techniques, and articles are also described.