Rich-Lean Gas Burner Air Guidance for Oscillation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing burners in gas devices suffer from oscillating combustion and combustion noise due to uneven air supply between rich and lean flames, leading to unstable combustion.
Innovation Solution
A burner design with a first and second flame port separated by a gap, featuring an air guide port to direct airflow into the gap, stabilizing the flame and reducing oscillatory combustion noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gap is provided between the rich fire port and the lean fire port to prevent interference, then the effectiveness of rich-lean combustion is ensured, but oscillating combustion occurs causing combustion noise
Solution Approach 1:
A guide wall is introduced as an intermediary structure between the rich and lean flame ports. This guide wall redirects the airflow to flow along its surface, preventing direct interference between the rich and lean flames while eliminating the oscillating combustion that causes noise. The guide wall acts as a mediator that maintains the effectiveness of rich-lean combustion without allowing the harmful oscillations to develop.
2Productivity
If excess air flows to the top of the gap and mixed gas burns above the gap, then rich-lean combustion is achieved, but combustion instability occurs leading to oscillating combustion
Solution Approach 1:
The guide wall serves as a mediator that redirects the excess air and mixed gas flow along its surface rather than allowing them to accumulate and burn unstable above the gap. This controlled flow path along the guide wall ensures stable combustion while maintaining the rich-lean combustion efficiency.
Solution Approach 2:
The guide wall changes the flow parameters of the excess air and mixed gas by redirecting them along its surface. This parameter change in flow direction and distribution stabilizes the combustion process, preventing the oscillating combustion that occurs when gases burn above the gap.
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 design suppresses oscillating combustion and reduces combustion vibration noise by ensuring consistent air supply to the flame, improving combustion stability and efficiency.
Implementation Method 1
A first air guide port is provided on an outer side wall of the gap portion formed by the inner shell, for guiding airflow in the second flame port into the gap portion
Implementation Method 2
part of the gas burn under insufficient air conditions, that is, the gas burns too 'rich'
Implementation Method 3
the other part of the gas burns under excessive air conditions, that is, the gas burns too 'lean'
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Discloses are a burner and a gas device. The burner includes an inner shell and an outer shell. The inner shell has a first flame port and a gap portion isolated from each other at the top. The outer shell is provided on the outer side of the inner shell, and forms a second flame port at the top with the inner shell, and the second flame port is located on the outer side of the gap portion away from the first flame port. One of the first flame port and the second flame port is a lean flame port, and the other of the first flame port and the second flame port is a rich flame port. The outer side wall of the inner shell forming the gap portion is provided with a first air guide port, for guiding airflow in the second flame port into the gap portion.