Burner Frame Projections for Combustion Box Positioning and Heat Control
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Solution Overview
Problem
In combustion apparatuses that omit the stationary plate for heat insulation, positioning the combustion plate with respect to the combustion box is challenging, and there is a risk of overheating due to the proximity of flames to the inner surface.
Innovation Solution
The combustion apparatus incorporates projecting parts on the burner frame's side plate, which position the burner frame with respect to the combustion box, reducing heat transfer and preventing overheating by being located away from the flames and covering only specific portions of the circumference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the stationary plate for heat insulation is omitted, then the device complexity is reduced, but the positioning of the combustion plate with respect to the combustion box cannot be accomplished
Solution Approach 1:
The patent combines the positioning function and heat insulation function into a single integrated structure. The projecting parts are formed directly on the side plate part of the burner frame, eliminating the need for a separate stationary plate. This merging of functions reduces device complexity while maintaining positioning precision through the geometric design of the projecting parts that engage with corresponding features on the combustion box.
Solution Approach 2:
The side plate part of the burner frame is designed to serve multiple functions: structural support, heat insulation (by being positioned away from the combustion box inner surface), and positioning (through the projecting parts). This multi-functionality eliminates the need for a separate stationary plate, reducing device complexity while maintaining positioning capability.
2Manufacturing precision
If the projecting parts are located close to the inner surface of the combustion box, then the positioning precision is improved, but the temperature increases due to heat transfer
Solution Approach 1:
The patent applies local quality by designing the projecting parts with specific geometric features that provide adequate spacing from the combustion box inner surface. The projecting parts are positioned to achieve the necessary positioning precision while maintaining a local gap that prevents excessive heat transfer. This local optimization allows simultaneous achievement of positioning accuracy and thermal management.
3Temperature
If the width of the frame flange part facing the inner space of the combustion box is narrowed, then the heat insulation requirement is reduced, but the positioning capability is lost
Solution Approach 1:
The patent segments the frame flange part into multiple functional zones: the main flange area for structural support and connection, and separate projecting parts for positioning. This segmentation allows the flange width to be optimized for structural purposes while the projecting parts provide positioning capability independent of the overall flange width. The narrowing of the flame-facing portion does not compromise positioning because the projecting parts maintain the necessary dimensional relationships.
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 solution allows for effective positioning of the combustion plate without a stationary insulation plate, reducing the risk of overheating by minimizing the heat transfer area and keeping the projecting parts away from direct flame exposure.
Implementation Method 1
an air-fuel mixture permeable body covering an opening enclosed by the burner frame from a burner-body side, through which the air-fuel mixture permeates, so that the air-fuel mixture permeating the air-fuel mixture permeable body and ejecting from the opening combusts
Implementation Method 2
a projecting part(s) positioning the burner frame with respect to the combustion box, which comes into contact with, or comes close to and is disposed opposite to an inner surface of the combustion box
Data Source
AI summary
In a combustion apparatus that includes a combustion plate having a burner frame with a shape of a picture frame, which covers an open surface of a burner body, and a frame flange part outwardly extending from a side plate part, which is sandwiched between a body flange part of the burner body and a box flange part of a combustion box, which is fastened to the body flange part, a projecting part(s) positioning the burner frame with respect to the combustion box, which comes into contact with, or comes close to and is disposed opposite to an inner surface of the combustion box is provided with the side plate part of the burner frame. Preferably, the projecting part(s) is provided at a portion away from an end of a side of an opening peripheral edge part of the side plate part to a side of the frame flange part.