Dual Sensor Combustion System for Fuel Gas Pressure Adaptation
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Solution Overview
Problem
Conventional gas water heaters face challenges in maintaining consistent thermal load and combustion efficiency due to varying fuel gas pressures across different regions and environments, leading to issues like low combustion load or insufficient combustion.
Innovation Solution
A dual sensor combustion system that includes a stepless speed regulating fan and a proportional valve, controlled by a control unit that uses first and second pressure sensors to adjust the fan speed and valve opening based on established correspondence relationships between target pressure signals, ensuring optimal air and fuel gas flow for stable combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the current of the proportional valve is set according to a general standard, then the device can operate in standard conditions, but it cannot adapt to regions with different fuel gas pressures
Solution Approach 1:
The patent implements a feedback mechanism where the actual pressure signal from the fuel gas conduit is continuously monitored and compared with the target pressure signal. The control unit adjusts the proportional valve opening based on the deviation between actual and target pressures, enabling the system to adapt to different fuel gas pressures automatically. This closed-loop control resolves the contradiction by providing adaptability without requiring complex manual configuration or multiple fixed settings.
Solution Approach 2:
The system dynamically changes the opening parameter of the proportional valve based on the detected fuel gas pressure. By adjusting the valve opening in response to pressure variations, the system maintains optimal combustion conditions across different pressure environments. This parameter adjustment strategy enables adaptability to different regions while keeping the control logic relatively simple.
2Reliability
If the proportional valve opening is increased to compensate for low fuel gas pressure, then more fuel gas can reach the combustor, but the combustion load remains insufficient
Solution Approach 1:
The control system uses feedback from the actual pressure signal to continuously adjust the proportional valve opening. When fuel gas pressure is low, the system increases the valve opening to maintain adequate fuel flow to the combustor. This dynamic adjustment ensures reliable combustion load while automatically adapting to pressure variations, maintaining operation stability without manual intervention.
Solution Approach 2:
The system performs self-adjustment by automatically detecting fuel gas pressure and modifying the valve opening accordingly. This self-service capability ensures that the combustion load remains sufficient across different operating conditions without requiring external control or complex operation procedures, thereby maintaining ease of operation.
3Reliability
If the proportional valve opening is increased to compensate for high fuel gas pressure, then more fuel gas reaches the combustor, but combustion becomes insufficient
Solution Approach 1:
The control system monitors the actual fuel gas pressure and uses feedback to adjust the proportional valve opening in the opposite direction when pressure is high. This reduces the fuel gas flow to match the combustor's capacity, maintaining efficient combustion. The automatic feedback control ensures reliable combustion efficiency while keeping the system easy to operate without manual adjustments.
Solution Approach 2:
The system automatically compensates for high fuel gas pressure by reducing the valve opening based on pressure sensor feedback. This self-adjusting mechanism maintains optimal combustion efficiency across different pressure conditions without requiring user intervention, thereby preserving ease of operation and stability.
4Reliability
If the fan rotation speed is increased to provide more combustion air, then combustion efficiency improves, but energy consumption increases
Solution Approach 1:
The control system uses feedback from the actual pressure signal and the correspondence relationship to determine the optimal fan rotation speed. By matching fan speed to the actual fuel gas pressure and target combustion requirements, the system provides sufficient combustion air only when needed, improving combustion efficiency while avoiding unnecessary energy consumption from excessive fan operation.
Solution Approach 2:
The system dynamically changes the fan rotation speed parameter based on the detected fuel gas pressure and combustion requirements. When fuel gas pressure is high, the fan speed is reduced; when pressure is low, the fan speed is increased appropriately. This parameter adjustment optimizes the balance between combustion efficiency and energy consumption.
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 system achieves precise control of thermal load and combustion efficiency, ensuring steady operation and reduced pollutant discharge by adapting to different fuel gas pressures and environmental conditions.
Implementation Method 1
a first pressure sensor assembly that detects a first pressure signal of the gas flow passage
Implementation Method 2
a second pressure sensor assembly that detects a second pressure signal of the fuel gas conduit
Implementation Method 3
a stepless speed regulating fan that supplies air for the combustor
Implementation Method 4
a proportional valve provided on the fuel gas conduit
Implementation Method 5
a combustor; a stepless speed regulating fan that supplies air for the combustor
Data Source
AI summary
The embodiments of the present application disclose a dual sensor combustion system. The dual sensor combustion system comprises: a combustor; a stepless speed regulating fan that supplies air for the combustor; a fuel gas conduit that is in communication with the combustor; a proportional valve provided on the fuel gas conduit; a control unit electrically connected to the stepless speed regulating fan and the proportional valve; a first pressure sensor assembly that detects a first pressure signal of the gas flow passage; a second pressure sensor assembly that detects a second pressure signal of the fuel gas conduit; a storage that stores a correspondence relationship between a first target pressure signal of the gas flow passage and a second target pressure signal of the fuel gas conduit; and the control unit controlling at least one of the stepless speed regulating fan and the proportional valve based on the first pressure signal, the second pressure signal and the correspondence relationship.