Gas Burner Deflection Element for Improved Fuel-Air Mixing Efficiency
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Solution Overview
Problem
Existing burners for gas-heated cooking appliances lack efficiency in mixing fuel gas with primary air, leading to suboptimal combustion and energy utilization.
Innovation Solution
Incorporating a deflection element, such as a cross-shaped wire, within the burner tube to deflect the combustion gases and primary air, enhancing their mixing and improving energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional burner tube without deflection elements is used, then the structure is simple, but the mixing of fuel gas with primary air is insufficient leading to low energy efficiency
Solution Approach 1:
A deflection element is introduced as an intermediary component within the burner tube to mediate the interaction between fuel gas and primary air. This element actively deflects and redirects the fuel gas stream, enhancing mixing with primary air without requiring complete redesign of the burner structure, thus improving energy efficiency while maintaining relative structural simplicity
Solution Approach 2:
The deflection element changes the flow parameters (direction, velocity distribution) of the fuel gas stream. By altering these parameters, the mixing characteristics between fuel gas and primary air are improved, leading to better combustion efficiency and reduced energy loss
2Loss of energy
If the deflection element is made with larger wire diameter (e.g., 2-3 mm), then the mixing effect is enhanced, but the pressure loss in the tube increases
Solution Approach 1:
The optimal wire diameter (1.3-1.7 mm) represents a parameter optimization that balances mixing efficiency with pressure loss. This specific range provides sufficient deflection effect for good mixing while maintaining acceptable pressure drop characteristics, resolving the contradiction between mixing enhancement and pressure loss
3Loss of energy
If the deflection element is positioned closer to the nozzle, then the mixing occurs earlier, but the fuel gas stream is not fully developed leading to reduced mixing effectiveness
Solution Approach 1:
The optimal positioning (15-25 mm from nozzle) represents a temporal and spatial parameter optimization. This distance allows the fuel gas stream to develop sufficiently before encountering the deflection element, ensuring effective mixing occurs at the right moment in the combustion process, balancing early mixing benefits with stream development requirements
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 deflection element significantly increases energy efficiency by 5.4% compared to burners without it, achieving better fuel combustion and energy output.
Implementation Method 1
The deflection element is set up to deflect the combustion gas, the primary air or both. The deflection takes place in particular in relation to the main inflow direction of the fuel gas, the primary air or the mixture of these.
Implementation Method 2
Fuel gas is injected into the tube with the aid of the nozzle. The tube acts as a Venturi tube, causing primary air to be entrained into the tube.
Implementation Method 3
The tube acts as a Venturi tube, causing primary air to be entrained into the tube.
Data Source
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AI summary
The present invention provides a burner (1) for a gas-heated cooking appliance (2), with a pipe (14) for mixing burnable gas (28) with primary air (29), and with a deflecting element (23) which is arranged in the interior space (24) which is bounded by the pipe (14).