Dual Fuel Ignition Device with Thermocouple Feedback
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Solution Overview
Problem
Gas appliances using dual fuel systems face safety hazards due to misoperation, particularly when high-heating value gas is inadvertently used with a nozzle designed for low-heating value gas, leading to excessive fire risks.
Innovation Solution
A dual fuel ignition device with oppositely connected thermocouples in series, which generates an electric potential to control a solenoid valve, ensuring safe operation by adjusting the gas flow based on the heating conditions, and an adjustable nozzle to maintain rated power while preventing high-fire scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a gas appliance uses a larger aperture nozzle for low-heating value gas, then the gas flow rate is increased to maintain rated power, but when high-heating value gas is mistakenly supplied, excessive fire and safety hazards occur
Solution Approach 1:
The patent changes the aperture parameter of the nozzle based on the heating value of the gas supplied. When high-heating value gas is detected, the system automatically adjusts to a smaller aperture nozzle configuration, preventing excessive fire while maintaining rated power output. This is achieved through the selector device that switches between different nozzle apertures corresponding to different gas types.
Solution Approach 2:
The patent implements a feedback mechanism using thermocouples to detect the actual gas heating value during ignition. The thermocouple signal feeds back to the control system, which then determines the appropriate nozzle aperture to use. This closed-loop feedback ensures that the correct aperture is selected based on real-time gas composition detection, preventing safety hazards from misoperation.
2Adaptability or versatility
If the gas appliance is designed to support dual fuel operation, then adaptability is improved, but the risk of misoperation and safety hazards increases
Solution Approach 1:
The patent performs preliminary detection of gas heating value before the main gas flow is opened. The thermocouple detects the gas type during the ignition phase, and based on this preliminary information, the system pre-configures the appropriate nozzle aperture and ignition parameters. This preliminary action prevents misoperation by ensuring the correct configuration is established before full operation begins.
Solution Approach 2:
The patent introduces a control system as an intermediary between the gas supply and the burners. This intermediary component receives thermocouple signals, processes the gas type information, and automatically selects the appropriate nozzle aperture and ignition parameters. The control system acts as a mediator that eliminates the need for manual configuration, thereby preventing misoperation while maintaining dual fuel adaptability.
3Reliability
If separate ignition devices are used for high-heating value gas and low-heating value gas, then ignition reliability is improved, but device complexity increases
Solution Approach 1:
The patent designs a universal ignition device that can handle both high-heating value gas and low-heating value gas through a single integrated system. The device uses a selector mechanism with multiple ignition electrodes that can be activated based on the detected gas type. This multi-functional design maintains ignition reliability for different gas types while avoiding the complexity of completely separate ignition systems.
Solution Approach 2:
The patent merges the ignition functions for different gas types into a single integrated ignition device. The ignition electrodes are positioned and configured to work with both gas types, and the control system统一管理 the ignition process. This consolidation reduces device complexity compared to having entirely separate ignition systems while maintaining the reliability needed for different gas compositions.
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 solution effectively prevents high-fire hazards by ensuring correct gas flow and ignition, maintaining safety and efficiency by adjusting the nozzle aperture according to the gas type, thus ensuring safe and reliable operation of the gas appliance.
Implementation Method 1
a dual fuel ignition device, comprising: a high-heating value gas igniting end, comprising a thermocouple and an ignition burner adapted to high-heating value gas; a low-heating value gas igniting end, comprising a thermocouple and an ignition burner adapted to low-heating value gas; wherein, anodes and cathodes of the two thermocouples are connected with each other in series oppositely to output electric potential according to the heating condition of the thermocouples
Data Source
AI summary
The present invention provides a dual fuel ignition device and a work method thereof, wherein the ignition device can output electric potential according to the opposite in-series connection of two thermocouples in a high-heating value gas igniting end and a low-heating value gas igniting end and the heating condition of the thermocouples, and can control the switching on or off of a control valve on a gas flow according to the effective heat electric potential generated by the thermocouples in the process of ignition, so as to avoid the danger condition that the main burner generates high fire caused by the misoperation of the gas appliance, therefore, the safe use can be guaranteed.