Combustion Cabinet Insulation Air Layer to Prevent Flame Lifting
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Solution Overview
Problem
Conventional combustion apparatuses with all primary combustion burners suffer from heat loss due to cooling air circulation, which deteriorates combustion performance by increasing the air excess rate and lifting flames, leading to inefficient combustion.
Innovation Solution
A combustion apparatus with a combustion plate and a cover made of insulation material having a concave portion to create an insulation air layer, preventing heat transfer from the combustion flames to the cabinet, thus eliminating the need for cooling air circulation and maintaining combustion performance. The insulation air layer's thickness is crucial, ranging from 28% to 44% of the cover's total thickness to prevent excessive heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cooling air is circulated between the burner and combustion cabinet to prevent heat loss, then heat loss is reduced, but combustion performance deteriorates due to increased air excess rate and flame lifting
Solution Approach 1:
The patent extracts the harmful cooling air circulation from the combustion chamber by introducing an insulation cover that blocks the ventilation gap. This eliminates the unwanted air infiltration that causes flame lifting and poor combustion, while still allowing controlled cooling air supply through dedicated channels away from the combustion zone.
Solution Approach 2:
The insulation cover acts as an intermediary element between the burner and combustion cabinet. It selectively blocks harmful air paths while permitting controlled thermal management, thereby mediating between the conflicting requirements of heat retention and combustion quality.
2Use of energy by moving object
If the combustion cabinet is allowed to heat up to retain heat, then energy efficiency improves, but heat loss occurs when the cabinet becomes hot
Solution Approach 1:
The patent changes the thermal parameters of the combustion cabinet by introducing an insulation cover that dynamically manages heat retention. The cover maintains optimal temperature ranges by preventing excessive heat buildup while still allowing useful heat retention, thereby optimizing energy efficiency without causing heat loss.
3Loss of energy
If a solid insulation cover is used to prevent heat transfer, then heat loss is reduced, but the cover becomes excessively hot during continuous combustion
Solution Approach 1:
The insulation cover is segmented into functional zones: an outer surface exposed to combustion heat, an insulation air layer for thermal protection, and an inner surface facing the combustion cabinet. This segmentation allows differential temperature management, where the outer surface can withstand high temperatures while the inner surface remains cooler to protect the cabinet.
Solution Approach 2:
The patent introduces an insulation air layer within the cover structure, utilizing the low thermal conductivity of trapped air to reduce heat transfer. This pneumatic insulation layer prevents excessive heat accumulation in the cover while maintaining effective thermal barrier function.
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 effectively prevents heat loss from the combustion cabinet while maintaining optimal combustion performance by controlling the insulation air layer's thickness and using a beveled edge to enhance insulation, keeping the cabinet temperature below 185°C and ensuring efficient combustion.
Implementation Method 1
an insulation air layer is defined by the concave portion
Implementation Method 2
the heat from the combustion flames of the mixture gas can be prevented from being transferred to the combustion cabinet by the cover
Data Source
AI summary
Provided is a combustion apparatus capable of preventing a heat loss from a combustion cabinet without deteriorating a combustion performance thereof. According to the present invention, a part of an inner side surface of a combustion cabinet (1), which encloses a combustion chamber where a mixture gas erupted from a combustion plate (22) is combusted, is covered with a cover (7) made of an insulation material; and the cover (7) is provided with a concave portion (7a) at an outer side surface thereof having contact with the inner side surface of the combustion cabinet (1), and an insulation air layer (7b) is defined by the concave portion (7a).