Concentric Gas Burner Caps with Parallel Emission Openings
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Solution Overview
Problem
Existing gas burner systems for food cooking appliances, particularly 'double crown' burners, face issues with complex construction, high costs, and inefficient combustion due to inadequate air-gas mixture distribution, leading to poor combustion and uncombusted gas emissions, as well as heat-related deformations and blackening of the cooking hob.
Innovation Solution
A gas burner system with concentric burners featuring a one-piece first burner cap and a second burner cap connected via arms, with openings designed to emit gas parallel to the burner axis, creating a 'carpet flame' for improved air-gas mixture distribution and secondary air access, reducing component complexity and cost while enhancing combustion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional metallic elements are fixed to the burner caps to improve air-gas mixture exit, then combustion efficiency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent integrates the air-gas mixture distribution function directly into the burner cap structure by forming protrusions and recesses during the single-piece casting process. This combines multiple functions (structural support and flow distribution) into one component, eliminating the need for separate metallic elements while maintaining combustion efficiency.
Solution Approach 2:
The burner cap is designed to perform multiple functions simultaneously: it serves as the structural cover for the burner, the distribution channel for air-gas mixture, and the geometric element that directs flame propagation. This multi-functionality reduces the total number of components needed in the system.
2Manufacturing precision
If wedge shaped profiles are realized on the burner cap to achieve uniform air-gas mixture exit, then mixture distribution is improved, but burner cap height increases and construction becomes complex
Solution Approach 1:
Instead of creating wedge-shaped profiles that extend vertically (increasing height), the patent uses radial protrusions and recesses that distribute the air-gas mixture in the horizontal plane. This dimensional shift achieves uniform distribution without increasing the vertical dimension of the burner cap.
Solution Approach 2:
The burner cap features localized protrusions and recesses at specific radial positions rather than uniform wedge shapes across the entire cap. This localized geometric modification creates targeted flow channels that direct the air-gas mixture uniformly without requiring excessive height or complex overall structure.
3Power
If openings are designed to emit gas in tangential direction to create crown flame, then flame propagation is enhanced, but secondary air access to inner openings is blocked and combustion efficiency decreases
Solution Approach 1:
The patent uses asymmetric protrusions and recesses that create a balanced flow pattern. The geometric asymmetry of individual features combines to produce symmetric radial flame propagation while maintaining open channels for secondary air to reach the center, resolving the conflict between flame power and air access.
Solution Approach 2:
The burner cap is segmented into multiple protrusions and recesses that create separate flow channels. This segmentation allows different regions to serve different functions: outer regions generate flame propagation while inner channels remain open for secondary air access, enabling both strong flames and efficient combustion.
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 uniform air-gas mixture exit, optimal combustion efficiency, and reduced uncombusted gas emissions, maintaining a simpler and cost-effective design by allowing secondary air to reach all burner openings, resulting in improved combustion and reduced heat-related issues on the cooking hob.
Implementation Method 1
the air-gas mixture is supplied separately to the burners, as a horizontal chamber with a radial Venturi effect is provided for mixing primary air and gas
Implementation Method 2
optimal combustion efficiency, and reduced uncombusted gas emissions, maintaining a simpler and cost-effective design by allowing secondary air to reach all burner openings, resulting in improved combustion
Data Source
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AI summary
The present invention refers to a gas burners system (1), in particular for a food cooking appliance , said burners system (1) comprising a couple of burners (10, 20) substantially concentric, said couple of burners (10, 20) comprising an outer burner (10) provided with a first burner cap (11) and an inner burner (20) provided with a second burner cap (21). The characteristic of the invention consists in the fact that said first burner cap (11) and said second burner cap (21) respectively comprise a plurality of first openings (13) and second openings (23) to allow the gas emission, said first openings (13) and second openings (23) being realized in order to develop in a substantially parallel way to an axis (A-A) of the burner (1).