Venturi Gas Burner Layout for Cooler External Ignition
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Solution Overview
Problem
Existing gas burners for ovens and grills face issues with overheating and deformation of metallic mounting brackets and wiring insulation due to heat exposure, leading to misalignment of ignition spark plugs and thermocouples, making ignition unreliable and difficult to maintain.
Innovation Solution
A gas burner design featuring a Venturi tube with a diverging section and 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 wiring insulation needs, with the ignition hole located on the wall for improved flexibility and ease of maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ignition spark plug and thermocouple are positioned inside the oven cavity near the burner, then reliable ignition is achieved, but the mounting brackets and wiring are subjected to heat causing deformation and insulation failure
Solution Approach 1:
The ignition hole is positioned on the outer surface of the oven wall, moving the ignition components from the high-temperature interior environment to the cooler exterior environment. This spatial relocation in another dimension (from inside to outside the oven cavity) allows the spark plug and thermocouple to operate reliably without exposure to harmful heat, while still achieving effective ignition through the wall opening.
2Manufacturing precision
If elongated brackets are used to hold the ignition spark plug near the ignition hole, then proper positioning is achieved, but the brackets deform due to prolonged heat exposure
Solution Approach 1:
The ignition hole is extracted from the interior of the oven cavity and positioned on the outer surface of the oven wall. This allows the ignition spark plug to be mounted on the exterior where it can be held in precise position without exposure to heat, eliminating the need for heat-resistant elongated brackets that would otherwise be required to reach from the hot interior to the ignition point.
3Reliability
If the ignition components are placed deep inside the oven cavity, then ignition function is achieved, but wiring insulation fails due to heat and length
Solution Approach 1:
By relocating the ignition hole to the outer surface of the oven wall, the wiring path is dramatically shortened and moved from the high-temperature interior environment to the cooler exterior environment. This dimensional change in positioning reduces both the length of wiring required and its exposure to heat, preventing insulation failure while maintaining ignition functionality.
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 risks, and simplifies maintenance by allowing the ignition spark plug and thermocouple to be easily accessed and replaced, while avoiding the use of elongated brackets and minimizing wiring insulation within the oven cavity.
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
Data Source
AI summary
Gas burner for oven, or grill, of fhe fype 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).