Stepped Cyclone Arrester Plate for Large Particle Separation
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Solution Overview
Problem
In surface cleaning apparatuses with cyclone chambers, larger dirt particles can accumulate and reduce separation efficiency, and increasing the dirt outlet size to allow their exit also reduces efficiency, creating a trade-off.
Innovation Solution
A cyclone chamber with a stepped arrester plate at the dirt outlet, featuring varying gap sizes between the plate and the sidewall, allowing larger particles to exit while maintaining separation efficiency by providing a larger outlet in specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dirt outlet size is increased to allow larger dirt particles to exit, then the ability to remove larger particles is improved, but the dirt separation efficiency of the cyclone chamber is reduced
Solution Approach 1:
The plate is positioned at a specific location (the dirt outlet end of the cyclone chamber) and provides a localized larger opening. This allows larger particles to exit at this specific location while the rest of the cyclone chamber maintains its separation efficiency, as the plate's placement is strategically chosen to minimize impact on the overall separation process.
Solution Approach 2:
The solution segments the dirt outlet function by introducing a plate that creates a dedicated exit path for larger particles. This separates the function of removing large particles from the general separation process, allowing the main cyclone chamber to focus on efficient separation while the plate handles the specific task of larger particle removal.
2Manufacturing precision
If a uniform small gap is maintained between the plate and cyclone chamber sidewall, then separation efficiency is maintained, but larger dirt particles cannot exit the cyclone chamber
Solution Approach 1:
Rather than maintaining a uniform small gap throughout, the plate is positioned to create a localized larger opening at the dirt outlet end. This allows the gap size to be optimized locally for larger particle removal while the overall separation efficiency is preserved through strategic placement.
3Volume of stationary object
If larger dirt particles accumulate in the cyclone chamber, then the cyclone chamber volume is occupied, but the dirt separation efficiency is reduced
Solution Approach 1:
The plate acts as an extraction mechanism that removes larger dirt particles from the cyclone chamber before they can accumulate and occupy valuable chamber volume. By continuously extracting these larger particles through the plate's larger opening, the cyclone chamber maintains its full effective volume and separation efficiency.
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 solution enables the efficient separation and collection of larger dirt particles without compromising the overall separation efficiency of the cyclone chamber, allowing for effective cleaning while preventing re-entry of debris.
Implementation Method 1
a cyclone chamber with a stepped arrester plate at the dirt outlet
Implementation Method 2
dirt particles that are entrained in an air stream entering a surface cleaning apparatus and which are disentrained during the passage of air through the cyclone chamber
Data Source
AI summary
A surface cleaning apparatus has a cyclone chamber having a longitudinal cyclone axis of rotation wherein the dirt outlet is defined by a gap between the sidewall of the cyclone and a plate positioned at the dirt outlet end of the cyclone.