Multi-Crown Gas Burner With Horizontal Venturi Ducts
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Solution Overview
Problem
Traditional multi-crown gas burners face challenges in achieving a low simmering flow rate without compromising stability and flame propagation, often resulting in injector obstruction due to small nozzle sizes and limited vertical dimensions, which restricts their use on built-in hobs and limits power adjustment.
Innovation Solution
A multi-crown gas burner design with a flame-spreader module featuring separate fluidic circuits for external and internal flames, utilizing horizontal venturi ducts and injectors to manage gas and air flow efficiently, allowing for a low simmering flow rate while maintaining stability and high power output, and incorporating a central simmering flame to reduce vertical height and prevent injector obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If an injector with an extremely small hole (0.2-0.4 mm diameter) is used to achieve a low simmering flow rate, then the simmering flow rate is reduced, but the injector becomes subject to frequent obstructions due to liquid overflow and dirt deposit
Solution Approach 1:
The patent extracts the simmering flame function from the traditional injector system. Instead of using a small-hole injector that is prone to obstruction, the invention uses a separate simmering flame generator with a larger opening that draws gas from the same chamber as the main flames, eliminating the clogging problem while maintaining low simmering flow rate capability
Solution Approach 2:
The patent introduces a common gas supply chamber as an intermediary between the gas source and both the main flames and simmering flame. This chamber allows the simmering flame to obtain gas without requiring a small-hole injector, as it draws from the same gas reservoir that supplies the main burners, thus avoiding obstruction issues
2Device complexity
If vertical venturi ducts are used to feed main crowns of flame in an external annular body, then the burner structure is simplified, but the vertical size increases and the maximum power is limited
Solution Approach 1:
The patent transitions from vertical venturi ducts to horizontal air intake openings in the flame-spreader plate. This dimensional change allows air to be drawn horizontally from the combustion chamber rather than vertically through long ducts, significantly reducing the burner's vertical height while maintaining the multi-crown flame structure
Solution Approach 2:
The patent segments the air supply function by providing separate air intake openings for the simmering flame and the main flames in the flame-spreader plate. This segmentation allows independent control and optimization of air supply paths, improving combustion efficiency while reducing overall vertical dimension
3Stability of the object's composition
If a simmering flame is positioned in the annular portion of the burner with a large diameter circumference, then the flame can propagate, but the flow rate cannot be reduced below certain limits without compromising stability
Solution Approach 1:
The patent creates a copied flame structure by generating the simmering flame within the combustion chamber itself rather than in the traditional annular position. This copied flame configuration, fed from the common gas chamber through a separate generator, achieves stable propagation at lower flow rates by utilizing the confined chamber environment and optimized air-gas mixing
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 burner achieves a wide adjustment range from minimum to maximum flow with enhanced stability and flame spreading capacity, is resistant to obstruction, and can be easily assembled and installed on hobs of varying thickness, offering improved performance and safety.
Implementation Method 1
a first venturi duct, which is in fluidic communication with said external annular portion of the flame-spreader, and a second venturi duct, which is in fluidic communication with the circular internal portion of said flame-spreader
Data Source
AI summary
A multi-crown gas burner with an injector holder module is attachable to a cooking hob and includes a flame-spreader module, positioned above the injector holder module, which includes a circular internal portion separated from an external annular portion by a substantially annular cavity. The injector holder module includes:at least one first venturi duct substantially horizontal to which at least one first injector faces, the at least one first venturi duct in fluid communication with a corresponding first chamber in fluid communication with a first set of doors provided in said external annular portion, so as to generate at least one first crown of main flames,a second substantially horizontal venturi duct to which a second injector, the second venturi duct is in fluid communication with a zone communicating fluidly with at least one passage provided in said circular internal portion for generating at least one simmering flame.