Two-Half-Shell Burner Assembly for Reliable Flame Transfer
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Solution Overview
Problem
Existing burners for ovens or grills with pilot flames are complex and expensive to produce due to the requirement of precise alignment and coupling of multiple elements, leading to high production costs and low reliability.
Innovation Solution
A burner design using two half-shells with a connecting portion of a circular arc shape, featuring a sequence of depressions and elevations that form a hollow space for flame transfer, allowing for efficient piloting of the flame with reduced parts and assembly complexity, ensuring consistent flame piloting across variations in shape, coupling, and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If three elements are used to form the main chamber and auxiliary chamber with strict dimensional tolerances, then the flame transmission hollow space dimension is guaranteed, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the main chamber and auxiliary chamber into a single integrated body formed by two half-shells, eliminating the need for separate third elements. The connecting portion of the half-shells directly forms the flame transmission hollow space, reducing assembly complexity while maintaining dimensional precision through the integrated design.
Solution Approach 2:
The body is segmented into two half-shells that are coupled together, allowing for easier manufacturing and assembly while maintaining the integrity of the flame transmission hollow space. The connecting portion is specifically designed with the sequence of depressions and elevations to ensure proper flame transmission between the half-shells.
2Reliability
If two half-shells are coupled with precise alignment to form cylindrical channels, then the pilot flame reliability is improved, but the production cost increases due to special attention in machining and coupling
Solution Approach 1:
The patent applies local quality by creating a specific sequence of depressions and elevations in the connecting portion of the half-shells. This localized structural feature ensures proper alignment and flame transmission without requiring precise alignment of the entire half-shell components, thereby improving manufacturability while maintaining pilot flame reliability.
Solution Approach 2:
The connecting portion with its sequence of depressions and elevations serves as a self-aligning feature during assembly. The structure automatically guides the half-shells into the correct position, eliminating the need for special attention in machining and coupling, and reducing production costs while ensuring reliable flame transmission.
3Manufacturing precision
If strict dimensional tolerances are applied to ensure correct flame transmission, then the flame piloting efficiency is maintained, but the production cost and assembly difficulty increase
Solution Approach 1:
The sequence of depressions and elevations is pre-formed in the connecting portion of the half-shells during manufacturing. This preliminary action ensures that when the half-shells are assembled, the flame transmission hollow space is automatically correctly positioned and dimensioned, eliminating the need for post-assembly adjustments and reducing assembly difficulty.
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 efficient flame piloting with reduced production costs and increased reliability by simplifying the assembly process and maintaining consistent flame performance across different burners and temperatures.
Implementation Method 1
said connecting portion (12) being designed to form a hollow space forming a duct for piloting the flame from said first flaming front to said second flaming front
Data Source
Figure 1
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Figure 4
AI summary
A burner (1) for oven or grill comprising a flat and elongated body (2) extending in a major longitudinal direction (3) and confining an inner chamber (4) adapted to receive a comburent/combustible mixture. The body (2) is formed with two half-shells (5, 6) mutually superposed and coupled in mirror image relationship and comprising edge portions (7) defining a coupling plane (8) of the two half- shells, A first series of flame holes (10) defines a first flaming front and a second series of flame holes (11) defining a second flaming front positioned at the coupling plane (8) of the two half-shells, on opposite sides of the inner chamber (4) and in communication therewith. The body (2) comprises a connecting portion (12) between the first flaming front and the second flaming front obtained at the coupling plane (8) of the two half-shells at an end of the inner chamber (4). The connecting portion is defined by respective connecting walls (13) of the two half- shells extending parallel to the coupling plane (8) in a sequence of depressions and elevations (15, 17) disposed between the first flaming front and the second flaming front and adapted to form flame transferring means.