Rotary Combustion Chamber Air Supply Control
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Solution Overview
Problem
Existing pellet burners lack effective control over the amount of air supplied to the combustion chamber, leading to over-oxidation or under-oxidation issues.
Innovation Solution
A ring-shaped slot is used as an air inlet between the worm feeder pipe contraction and reducer inlet, allowing for continuous adjustment of rotary combustion chamber aeration, ensuring precise air supply and optimal fuel-air mixture composition throughout combustion phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If air is supplied through multiple holes and nozzles located in different places behind and around the combustion chamber, then the combustion chamber can be aerated, but the amount of air supplied cannot be effectively controlled, leading to over-oxidation or under-oxidation
Solution Approach 1:
The patent applies the dynamics principle by making the combustion chamber rotary instead of fixed. The combustion chamber rotates on a vertical axis, allowing the aeration slots to dynamically sweep through different angular positions. This rotational movement enables continuous adjustment of the air supply amount by controlling the rotation speed and angular position, thereby achieving reliable control over the fuel-air mixture composition and preventing over- or under-oxidation.
2Adaptability or versatility
If a fixed combustion chamber with multi-point air blow-in is used, then the structure is simple, but the aeration cannot be continuously adjusted to maintain optimal fuel-air mixture throughout combustion phases
Solution Approach 1:
The combustion chamber is designed to rotate on a vertical axis, transforming a static structure into a dynamic one. This rotation allows the aeration slots to sweep through different angular positions, enabling continuous adjustment of air supply to match different combustion phases (ignition, steady combustion, temperature maintenance). The rotary mechanism provides adaptability while maintaining relatively simple structural implementation.
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
Enables continuous adjustment of air supply to the combustion chamber, maintaining optimal aeration and fuel-air mixture composition from ignition to temperature maintenance, preventing over- or under-oxidation.
Implementation Method 1
The fan 6, which delivers air necessary for burning pellets forces air under pressure into the blow-in chamber 7. An overpressure effect occurs in the chamber as a result of which the accumulated air in the chamber is flowing out throughout a ring- shaped slot 14
Data Source
Figure 1~2
Figure 1a~1b
AI summary
The subject of the utility model is an unit for supplying air to the combustion chamber of a pellet burner having a housing with a delivery pipe of pellets and a rotary chamber, in addition, inside the housing there are a motor driving a shaft of a worm feeder of pellets and a fan, and a part of the burner housing is a blow-in chamber. The essence of a solution according to the utility model is a ring-shaped slot (14), which is an inlet of air from the blow- in chamber (7) to an axial part of the chamber (2), created between a contraction (9) on the outlet of a pipe of the worm feeder (5) and an inlet (10) of a reducer (11), an outlet (12) of which is fitted in a rear wall (13) of the combustion chamber (2).