Cyclone Dirt Outlet With Variable Gap 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, as existing dirt outlets are either too small to allow these particles to exit, or if enlarged, compromise the separation efficiency.
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, includes axially stepped and radially varying designs to accommodate different particle sizes.
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 accumulation of larger particles is reduced, but the dirt separation efficiency is reduced
Solution Approach 1:
The cyclone chamber incorporates multiple dirt outlets with different sizes at different locations. Specifically, a first dirt outlet with a first size and a second dirt outlet with a second size (larger than the first) are provided. This allows the system to handle various particle sizes effectively - smaller particles exit through the first outlet while larger particles exit through the second outlet, maintaining separation efficiency while accommodating larger debris.
2Ease of operation
If the dirt outlet size is increased to accommodate larger particles, then particle exit capability is improved, but the cyclone chamber separation performance deteriorates
Solution Approach 1:
The dirt outlet is segmented into multiple outlets with different sizes. The first dirt outlet has a first size optimized for smaller particles, while the second dirt outlet has a second size (larger than the first) optimized for larger particles. This segmentation allows each outlet to perform its specific function, ensuring that larger particles can exit without compromising the separation performance for smaller particles.
3Productivity
If a single large dirt outlet is provided, then larger particles can exit freely, but separation efficiency is compromised; if a single small outlet is provided, then separation efficiency is maintained, but larger particles accumulate
Solution Approach 1:
The cyclone chamber incorporates multiple dirt outlets with different sizes at different locations. Specifically, a first dirt outlet with a first size and a second dirt outlet with a second size (larger than the first) are provided. This allows the system to handle various particle sizes effectively - smaller particles exit through the first outlet while larger particles exit through the second outlet, maintaining separation efficiency while accommodating larger debris.
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 effectively allows larger dirt particles to exit the cyclone chamber, reducing accumulation and maintaining high separation efficiency by providing a variable dirt outlet that accommodates various particle sizes, thereby preventing eddy currents and improving dirt collection.
Implementation Method 1
a cyclone chamber with a dirt collection chamber exterior to the cyclone chamber. 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
Implementation Method 2
dirt particles that are larger than the size of the dirt outlet (e.g., popcorn) may tend to accumulate in 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.