Gas Burner Diversion Duct for Cooler Oven Ignition
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Solution Overview
Problem
Existing gas burners for ovens and grills face issues with the overheating and deformation of metallic mounting brackets for ignition spark plugs and thermocouples, leading to misalignment and difficulties in igniting the burner, especially due to the need for elongated brackets and insulated wiring within the oven cavity.
Innovation Solution
A gas burner design featuring a diversion duct that allows the ignition spark plug and thermocouple to be positioned near an oven wall, eliminating the need for elongated brackets and reducing overheating, with the ignition hole coinciding with the diversion duct's outlet section, enabling flexible placement and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ignition spark plug and thermocouple are positioned in proximity to the ignition hole on the burner body, then reliable ignition is achieved, but the mounting brackets and wiring are subjected to overheating and thermal deformations
Solution Approach 1:
A diversion duct is introduced as an intermediary component to transport a portion of the fuel-gas/air mixture from the Venturi tube to the ignition hole. This allows the ignition components to be positioned remotely from the heat source while maintaining functional proximity through the duct system, thus mediating between the need for reliable ignition and avoidance of thermal damage
Solution Approach 2:
The ignition hole is positioned in a different spatial location (near the oven wall) rather than directly on the burner body, utilizing the third dimension (depth/positioning along the oven wall) to resolve the conflict between ignition reliability and thermal exposure. The diversion duct bridges this spatial separation
2Manufacturing precision
If elongated brackets are used to hold the ignition spark plug and thermocouple near the ignition hole, then proper positioning is achieved, but the brackets deform due to prolonged heat exposure
Solution Approach 1:
The diversion duct serves as a mediator that enables precise positioning of ignition components at the oven wall location, while the bracket itself remains in a cooler region. The duct transmits the fuel mixture over the required distance, decoupling the positioning requirement from the bracket's thermal environment
Solution Approach 2:
The ignition hole and its associated components are effectively extracted from the immediate vicinity of the burner body and repositioned near the oven wall. This extraction removes the ignition components from the high-temperature zone, allowing the use of simpler, shorter brackets that are not subjected to prolonged thermal stress
3Temperature
If the ignition spark plug and thermocouple are positioned away from the burner body near the oven wall, then overheating is reduced, but the ignition hole must be remotely positioned requiring a diversion duct
Solution Approach 1:
The fuel delivery system is segmented into two separate pathways: the main flow through the distribution chamber to the flame openings, and a diverted flow through the diversion duct to the ignition hole. This segmentation allows independent optimization of each pathway, positioning the ignition components in a cooler location without compromising the main combustion function
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 design ensures reliable ignition, reduces overheating, and simplifies maintenance by allowing the ignition spark plug and thermocouple to be easily replaced, while minimizing the need for insulation and preventing misalignment due to thermal deformations.
Implementation Method 1
a mixing chamber, composed of a Venturi tube, adapted to create a mixture of gas-primary air
Implementation Method 2
an ignition spark plug electrically operated, disposed to spark the flame next to at least one ignition hole
Implementation Method 3
a thermocouple might be placed as well, belonging to a safety device against the accidental burner switching off, known by itself, that is disposed to detect the flame presence
Data Source
AI summary
Gas burner for oven, or grill, of the type comprising at least one Venturi tube (16), for forming the fuel mixture of primary air-gas, having at least one zone with a reduced section followed by a zone with a diverging section, at least one distribution chamber (17) of the fuel mixture, placed downstream the zone with a diverging section of the Venturi tube (16), and a plurality of flame openings (19) for the outflow of the fuel mixture, obtained within such a distribution chamber (17), or in fluidic communication with the latter, as well at least one ignition hole (13) for igniting the burner. Advantageously the latter comprises at least one diversion duct (12) for part of the flow of the fuel mixture, exhibiting its own inlet section obtained in a sector downstream the zone with a reduced section of the Venturi tube (16), and its own outlet section placed at the afore said ignition hole (13).