Burner Positioning Frame Drawn Part for Heat Shield Cooling
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Solution Overview
Problem
The existing combustion apparatus design often results in insufficient cooling of the heat shield plate due to secondary air flowing into unwanted clearances, reducing the amount of air that effectively cools the rear frame part and leading to inadequate heat dissipation.
Innovation Solution
Incorporating a restrained part, such as erected pieces or a second drawn part, to prevent secondary air from flowing into the clearance between the rear frame part and the side frame parts, ensuring that the air flows upward along the rear frame part to maintain sufficient cooling of the heat shield plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the rear frame part has a drawn part to restrain secondary air, then the heat shield plate cooling is improved, but the device complexity increases
Solution Approach 1:
The burner positioning frame is divided into multiple functional parts: the rear frame part with a drawn part for air restriction, side frame parts with erected pieces for additional restraint, and the partition plate with distribution holes. This segmentation allows each part to perform its specific function in controlling secondary air flow, resolving the contradiction by making the complex structure serve multiple targeted purposes for effective heat shield plate cooling.
Solution Approach 2:
The drawn part and erected pieces act as intermediary structures that mediate the flow of secondary air. Instead of directly cooling the heat shield plate, these intermediary elements first restrict and redirect the air flow through the clearance spaces, ensuring the air reaches the heat shield plate in the intended manner, thus resolving the cooling effectiveness issue while managing the structural complexity.
2Temperature
If the secondary air flows into the clearance between rear frame part and rear plate part, then the heat shield plate cooling is improved, but the secondary air may flow forward through side clearances reducing cooling effectiveness
Solution Approach 1:
The drawn part and erected pieces are positioned to preemptively block the secondary air from flowing forward through the side clearances between the side frame parts and side plate parts. By placing these restraining structures in advance, the air flow is redirected upward along the rear frame part before it can escape through the side clearances, ensuring reliable and consistent cooling of the heat shield plate.
Solution Approach 2:
The restraint structures (drawn part and erected pieces) are strategically positioned at specific locations where air flow deviation occurs. The drawn part is located on the rear frame part, while erected pieces are placed on the side frame parts. This localized placement of restraining elements addresses the specific problem areas where air flow leakage occurs, ensuring the secondary air maintains its intended upward flow path for effective heat shield plate cooling.
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 secures a sufficient amount of secondary air to flow upward along the rear frame part, effectively preventing the lack of cooling and ensuring the heat shield plate is adequately cooled, thereby maintaining efficient heat dissipation.
Implementation Method 1
the secondary air flowing in from the distribution holes positioned in the portion closer to the rear end of the partition plate flows upward along the front surface of the rear frame part such that a heat-shield plate covering an upper inner surface of the rear plate part of the combustion box is cooled by this secondary air
Implementation Method 2
a heat-shield plate covering an upper inner surface of the rear plate part of the combustion box is cooled by this secondary air
Data Source
AI summary
A combustion chamber inside a combustion box has disposed therein a burner positioning frame having: a rear frame part positioned on a rear side of a burner-disposed portion; and a burner positioning frame having side frame part positioned on each laterally outside of the burner-disposed portion. The rear frame part has formed therein a laterally elongated drawn part which is dented rearward. The secondary air flowing from the distribution holes positioned in such a portion of the partition plate as is closer to the rear end of the partition plate is restrained by the drawn part from flowing upward from between the partition plate and a lower edge of the rear frame part through a clearance between the rear frame part and a rear plate part of the combustion box.