Totally aerated combustion burner
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Solution Overview
Problem
In totally aerated combustion burners, heat transmission from the metal-fiber knit to the distribution plate leads to elevated temperatures and a high risk of backfire due to spot-welding, which is not effectively addressed by existing technologies.
Innovation Solution
The distribution plate is spot-welded to a portion of the burner frame offset from the opening peripheral part, rather than directly with the metal-fiber knit, to prevent heat transmission and reduce the distribution plate's temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the distribution plate is spot-welded to the opening peripheral part of the burner frame, then the distribution plate is securely fixed, but heat is transmitted from the metal-fiber knit to the distribution plate causing elevated temperature and backfire risk
Solution Approach 1:
The burner frame is segmented into distinct functional zones: the opening peripheral part for metal-fiber knit attachment and a separate fixed part for distribution plate attachment. This spatial segmentation prevents heat transmission path formation while maintaining secure fixing of the distribution plate through spot-welding to the isolated fixed part.
Solution Approach 2:
The fixed part of the burner frame acts as an intermediary element that receives the distribution plate without direct thermal contact to the metal-fiber knit. This intermediary structure provides mechanical support while blocking the heat transmission path from the high-temperature metal-fiber knit to the distribution plate.
2Ease of manufacture
If the distribution plate is spot-welded to the opening peripheral part, then assembly is simplified, but heat transmission causes backfire hazard
Solution Approach 1:
The burner frame is divided into functional zones with the fixed part specifically designated for distribution plate attachment. This segmentation maintains assembly simplicity through spot-welding while eliminating the backfire hazard by preventing direct heat transmission path formation between the metal-fiber knit and distribution plate.
3Device complexity
If the metal-fiber knit and distribution plate are both spot-welded to the same burner frame portion, then structural compactness is achieved, but heat transmission elevates distribution plate temperature
Solution Approach 1:
The burner frame is segmented into functionally distinct regions: the opening peripheral part for metal-fiber knit support and the fixed part for distribution plate attachment. This spatial segmentation maintains structural compactness while preventing heat transmission by ensuring the distribution plate is welded only to the fixed part that is thermally isolated from the metal-fiber knit.
Solution Approach 2:
Different portions of the burner frame are assigned different functional qualities: the opening peripheral part provides mechanical support for the metal-fiber knit, while the fixed part provides a thermally isolated attachment point for the distribution plate. This local differentiation of functional qualities prevents heat transmission while maintaining overall structural integrity.
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 arrangement effectively prevents backfire by reducing heat transmission from the metal-fiber knit to the distribution plate, maintaining a lower temperature and enhancing safety.
Implementation Method 1
heat is likely to be transmitted from the metal-fiber knit to the distribution plate through the welded positions
Data Source
AI summary
A totally aerated combustion burner has: a burner body which is supplied therein with air-fuel mixture; and a combustion plate part which covers an open surface of the burner body. The combustion plate part is constituted by: a burner frame in a shape of a picture frame; a metal-fiber knit which is disposed to cover, from a burner-body side, an opening enclosed by the burner frame; and a distribution plate which has formed therein a multiplicity of distribution holes and which sandwiches the metal-fiber knit between the burner frame and the distribution plate. Only the metal-fiber knit is spot-welded to that opening peripheral part of the burner frame which is positioned on a same surface as the opening. The distribution plate is spot-welded to that portion of the burner frame which is offset from the opening peripheral part toward the burner-body side.