Curving Auger Pellet Stove Feed for Dust and Back-Burn Control
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Solution Overview
Problem
Pellet stoves require a constant supply of granular material, leading to bulkiness and dust buildup, with increased risk of back burning due to sensitive auger designs that do not allow for full storage emptying and efficient space use.
Innovation Solution
A stove design featuring a curving auger that draws granular material from beneath the storage, feeding it upwards to the combustion area, with a centreless helical element and a down duct to reduce noise and risk of back burning, and a centre shaft for the upper auger to prevent heat damage, along with airflow apertures and a combi stove option for log combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If granular material is fed from above into the combustion chamber, then the feeding mechanism is simpler, but the granular material and feeding means influence the combustion process and durability is reduced
Solution Approach 1:
The patent inverts the conventional feeding approach by feeding granular material from below the combustion chamber instead of from above. The curving auger draws material upward from the storage container through the bottom of the combustion chamber, preventing material and feeding means from interfering with the combustion process while maintaining system durability
2Object-generated harmful factors
If the storage container is positioned to allow complete emptying, then dust buildup is avoided, but the stove becomes larger and bulkier
Solution Approach 1:
The patent changes the spatial arrangement by positioning the storage container beneath the combustion chamber and using a curving auger that transports material vertically upward. This vertical dimension allows complete emptying of the storage container without requiring excessive horizontal space, maintaining compact stove dimensions while preventing dust buildup
3Stability of the object's composition
If a rigid helical element is used in the curving auger, then the auger structure is more stable, but noise increases due to crushing granular material against the outer tube
Solution Approach 1:
The patent employs a flexible helical element in the curving auger that can bend and adapt to the curved path without crushing granular material against the outer tube. This flexibility reduces operational noise while maintaining adequate structural stability for material transport
4Device complexity
If the upper auger lacks a centre shaft, then the design is simpler and noise is reduced, but heat damage to the auger increases
Solution Approach 1:
The patent introduces a centre shaft as an intermediary element in the upper auger that acts as a heat sink, absorbing and dissipating heat away from the helical element. This prevents heat damage to the auger while maintaining a relatively simple design without excessive complexity
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 complete storage emptying, reduces dust buildup and back burning risk, improves space efficiency, and allows for a more durable and efficient combustion process with cleaner operation.
Implementation Method 1
the granular material feeding means comprises a curving auger, wherein said granular material feeding means further comprises an upper auger
Data Source
Figure 1~2
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Figure 5~6
AI summary
Disclosed is a stove (1) arranged for combusting granular material. The stove (1) comprises a granular material combustion area (5) including a bottom combustion surface (6) and granular material feeding means (15) arranged for feeding granular material up into the granular material combustion area (5) from a granular material storage (16) arranged beneath the granular material combustion area (5), wherein the granular material feeding means (15) comprises a curving auger (21). Furthermore, a use of a stove (1) is disclosed.