Surface Gas Burner Air Inlet Layout for Stable Combustion
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Solution Overview
Problem
Existing gas burner systems face challenges in efficiently supplying primary air for complete combustion, particularly when multiple burner units are in use, leading to pressure drops and reduced performance during sudden changes in pressure.
Innovation Solution
The design incorporates a spreader with gas outlets and a venturi mixing chamber, along with an orifice holder featuring upwardly directed primary air inlets that are in fluid communication with the venturi, allowing ambient air to be drawn in from above the cooktop and mixed with fuel gas for ignition, while preventing spillage and ensuring consistent air supply to each burner unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If primary air is supplied from below the cooktop only, then the structure is simple, but pressure drops occur and combustion efficiency decreases when multiple burners are in use
Solution Approach 1:
The air supply system is segmented into two distinct pathways: a first primary air inlet located below the cooktop surface and a second primary air inlet located above the cooktop surface. Each inlet serves specific burner units, dividing the air supply function to prevent pressure drops when multiple burners operate simultaneously.
Solution Approach 2:
The air supply structure transitions from a single-dimensional (below-cooktop) approach to a two-dimensional approach by adding vertical air inlets extending through the cooktop surface. This adds a new spatial dimension for air intake, enabling simultaneous air supply from both above and below the cooktop.
2Reliability
If upwardly directed primary air inlets are added through the cooktop surface, then air supply reliability improves, but the risk of spillage onto the cooktop increases
Solution Approach 1:
Ridges are introduced as intermediary structures that extend upwardly around the edges of the primary air inlets. These ridges act as barriers between the air inlet openings and the cooktop surface, preventing spillage of materials while allowing air to pass through the inlets.
Solution Approach 2:
The ridges provide localized protection around each air inlet opening, creating a raised barrier structure that specifically addresses the spillage risk at the inlet locations without affecting the overall cooktop design or other functional areas.
3Reliability
If multiple primary air inlets are provided for each burner unit, then combustion efficiency improves, but device complexity increases
Solution Approach 1:
The first primary air inlet structure below the cooktop is designed to serve multiple burner units simultaneously. This multi-functional air inlet reduces the total number of separate inlet components needed while still providing adequate air supply to multiple burners, balancing complexity with performance.
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
This configuration ensures efficient primary air supply to each gas burner unit, preventing pressure drops and maintaining low simmer rates, even during sudden changes in pressure, thereby enhancing combustion efficiency and preventing spillage of materials onto the cooktop.
Implementation Method 1
A venturi is in fluid communication with the gas outlets
Data Source
AI summary
A gas burner unit for a cooktop having a spreader positioned above the top surface of the cooktop. The spreader has a plurality of gas outlets. A venturi is in fluid communication with the gas outlets. An orifice holder secures a gas orifice in position in a main body of the orifice holder and has a plurality of protrusions extending upwardly and defining a plurality of upwardly directed primary air inlets. The plurality of primary air inlets are in fluid communication with the main body of the orifice holder, and the main body is in fluid communication with the venturi. A general primary air inlet allows ambient air from outside the cooktop to enter the area below the cooktop, and the main body of the orifice holder includes openings allowing fluid communication between the area below the cooktop and the main body of the orifice holder.