Stick Vacuum Cyclone Header Design to Reduce Backpressure
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Solution Overview
Problem
Current surface cleaning apparatuses, such as hand vacuum cleaners, face challenges with backpressure issues due to complex air flow paths, which affect efficiency and performance.
Innovation Solution
The design incorporates a cyclone with a header positioned upstream of the cyclone, distributing air evenly to cyclone air inlets, and a configuration that reduces backpressure by aligning the air flow path with the cyclone axis of rotation, along with a tangential air inlet and a tapered screen member to enhance separation efficiency and dirt collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex air flow path is used in surface cleaning apparatus, then dirt separation capability is improved, but backpressure increases and efficiency decreases
Solution Approach 1:
The cyclone separator is divided into multiple cyclone chambers arranged in parallel, each handling a portion of the air flow. This segmentation allows effective dirt separation across multiple chambers while distributing the air flow to reduce backpressure compared to a single large cyclone.
Solution Approach 2:
The patent transitions from a single-axis cyclone design to a multi-axis configuration where multiple cyclone chambers are arranged around a central axis. This dimensional change allows air to be distributed through a header to multiple inlets simultaneously, reducing flow path complexity and backpressure while maintaining separation effectiveness.
2Adaptability or versatility
If air flow path is not aligned with cyclone axis of rotation, then structural flexibility is improved, but backpressure increases
Solution Approach 1:
The header design incorporates asymmetric inlet configurations that strategically direct air flow to optimize alignment with each cyclone chamber's rotation axis. This asymmetric arrangement reduces backpressure by improving flow alignment while maintaining the flexible multi-chamber 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
This configuration improves the efficiency of the surface cleaning apparatus by reducing backpressure and ensuring effective air flow, leading to better dirt separation and collection, regardless of the apparatus's orientation.
Implementation Method 1
a cyclone with a header positioned upstream of the cyclone, distributing air evenly to cyclone air inlets
Implementation Method 2
a tapered screen member to enhance separation efficiency and dirt collection
Data Source
AI summary
A stick surface cleaning apparatus comprises a surface cleaning head, which has a dirty air inlet and a surface cleaning head air outlet, and a wand that is moveable between an upright storage position and a reclined in use position. When the wand is mounted to the surface cleaning head and in the upright storage position, the wand has a lower end and an axially spaced apart upper end, a wand axis extending between the lower end and the upper end and a longitudinally extending sidewall, wherein the wand comprises an air treatment member having an air inlet at the lower end of the wand, an air outlet positioned above the air inlet of the air treatment member and a dirt collection region whereby, in operation, dirt separated from air flowing through the wand is collected in the dirt collection region.