Connected Combustion Heaters for Stable Flame Transfer
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Solution Overview
Problem
Existing combustion heaters face challenges in maintaining flame-transferring and flame-holding performance when multiple units are connected, leading to increased CO emission and reduced thermal efficiency due to manufacturing cost and heat deformation issues.
Innovation Solution
A combustion-heating system with a plurality of connected combustion heaters, featuring a flame-holding part and communication path in series, where the communication path connects combustion chambers and includes an enlarged flow path area, allowing efficient flame transfer and holding while maintaining thermal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple combustion heaters are connected to increase heating surface area, then the amount of heat and heating surface area are increased, but maintaining sealing function becomes more difficult and manufacturing cost increases
Solution Approach 1:
The system divides the heating function into multiple independent combustion heaters that can be connected in series. Each heater unit maintains its own sealed combustion chamber while being connected through standardized interfaces, allowing the total heating surface area to be increased by simply adding more units without proportionally increasing the complexity of sealing each individual unit.
2Ease of operation
If flame-transferring structure is formed to enable ignition of multiple combustion heaters, then flame transfer between heaters is achieved, but flame-holding performance deteriorates and CO emission increases
Solution Approach 1:
A flame-holding part is introduced as an intermediary component between the combustion chamber and the flame-transferring structure. This specialized component maintains a stable flame zone that facilitates flame transfer to adjacent combustion heaters while preserving the flame-holding performance required for efficient combustion and low CO emission.
3Ease of operation
If outer peripheral wall is modified to provide flame-transferring structure, then flame transfer is enabled, but flame-holding function is reduced and thermal efficiency decreases
Solution Approach 1:
The outer peripheral wall is modified locally at specific positions to create flame-transferring structures, while other portions of the wall maintain their original flame-holding properties. This localized modification allows flame transfer functionality to be added without compromising the thermal efficiency and flame-holding performance of the overall structure.
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 system achieves both flame-transferring and flame-holding performance effectively, reducing CO emission and maintaining high thermal efficiency even when multiple heaters are connected, while minimizing manufacturing costs and heat deformation effects.
Implementation Method 1
the outflow path to preheat the fuel gas by heat of the exhaust gas through the partition plate
Implementation Method 2
a combustion chamber positioned along the outer peripheral wall, the combustion chamber in which fuel gas collides with a flame-holding part constituting part of the outer peripheral wall, thereby holding flames
Implementation Method 3
a heating plate; an arrangement plate disposed facing to the heating plate
Data Source
AI summary
A combustion-heating system includes a plurality of combustion heaters connected to each other, a combustion heater including: a heating plate; an arrangement plate; an annular outer peripheral wall; a partition plate; a combustion chamber in which fuel gas collides with a flame-holding part constituting part of the outer peripheral wall, and thereby holding flames; an inflow path through which the fuel gas flows into the combustion chamber; and an outflow path through which exhaust gas flows from the combustion chamber toward the outside thereof, the outflow path to preheat the fuel gas by heat of the exhaust gas through the partition plate. The combustion-heating system includes a communication path communicating combustion chambers thereof with each other. The flame-holding part and the communication path are provided in series in a direction in which the heating plate and the arrangement plate face to each other.