Gas Burner Calibration via Ionization Sensor Feedback
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Solution Overview
Problem
Existing methods for calibrating gas/air mixtures in gas burners are limited in their ability to dynamically adjust to varying gas qualities across the entire modulation range of the burner, particularly relying on ionization sensor signals that are only calibrated at specific times or near full-load operation, leading to suboptimal combustion efficiency.
Innovation Solution
A method that continuously adjusts the gas flow relative to the air flow by changing the throttle position, monitoring the ionization sensor signal to distinguish between flattening and maximum detections, allowing for improved calibration of the gas/air mixture across different gas qualities, independent of the ionization sensor signal modulation range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If calibration is performed only at specific times or near full-load operation, then the device complexity is reduced, but the combustion efficiency deteriorates across the modulation range
Solution Approach 1:
The patent applies dynamics by making the calibration reference point adaptive rather than fixed. The system dynamically identifies the signal maximum or flattening point during each calibration cycle, allowing the reference throttle position to adjust automatically based on actual sensor characteristics and operating conditions, thereby improving combustion efficiency across the entire modulation range without increasing device complexity
Solution Approach 2:
The patent employs feedback by continuously monitoring the ionization sensor signal during calibration and using this feedback to identify the signal maximum or flattening point. This feedback mechanism enables the system to automatically determine the optimal reference throttle position based on real-time sensor responses, ensuring optimal combustion efficiency without requiring complex manual calibration procedures
2Measurement precision
If the gas amount is continuously increased relative to air amount during calibration, then the calibration accuracy is improved, but the risk of incomplete combustion increases
Solution Approach 1:
The patent applies preliminary action by first establishing a safe operating framework before performing the calibration sweep. The system ensures the gas/air mixture remains within safe combustion limits during the entire calibration process by carefully controlling the rate of gas amount increase and monitoring sensor signals, thereby achieving high calibration accuracy without risking incomplete combustion
Solution Approach 2:
The patent uses feedback to continuously monitor the ionization sensor signal during the calibration process. By detecting the signal maximum or flattening point in real-time, the system can accurately determine the optimal reference throttle position while maintaining safe combustion conditions throughout the calibration sweep, preventing incomplete combustion even as gas amount increases
3Adaptability or versatility
If the ionization sensor signal is used for calibration across the entire modulation range, then the adaptability to different gas qualities is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the essential calibration function from the overall control system by focusing solely on using the ionization sensor signal for determining the reference throttle position. This extraction approach maintains adaptability to different gas qualities while avoiding the need for complex control algorithms, thereby improving versatility without significantly increasing device complexity
Solution Approach 2:
The patent applies parameter changes by utilizing the ionization sensor signal characteristics (maximum or flattening point) as the basis for calibration across different gas qualities. This method enables the system to adapt to varying gas compositions through simple parameter observation rather than complex control logic, maintaining versatility while keeping the control system relatively simple
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
Ensures a consistent and optimal gas/air mixture calibration across the entire modulation range of the gas burner, enhancing combustion efficiency and reliability by continuously adjusting the gas flow based on real-time ionization sensor feedback.
Implementation Method 1
a signal provided by an ionization sensor
Data Source
Figure 1
Figure 2~3
AI summary
Method for operating a gas burner (10), wherein during burner-on phases a defined gas/air mixture having a defined mixing ratio of gas and air is provided to a burner chamber (11) of the gas burner (10) for combusting the defined gas/air mixture within the burner chamber (11), wherein the defined gas/air mixture is provided by a mixing device (23) mixing an air flow provided by an air duct (15) with a gas flow provided by a gas duct (16). During burner-on phases the defined mixing ratio of gas and air of the defined gas/air mixture can be calibrated to different gas qualities on basis of a signal provided by an ionization sensor (13) positioned downstream of the mixing device (23) within the burner chamber (11). For the calibration of the gas/air mixture the gas/air mixture is made richer by increasing the gas amount of the gas/air mixture relative to the air amount of the same until a flattening or a maximum of the signal provided by the ionization sensor (13) is detected, whereby the further calibration of the gas/air mixture depends on if either a flattening or a maximum of the signal provided by the ionization sensor (13) is detected.