Handheld Vacuum Cyclone Flow-Diverting Wall to Reduce Debris Clogging
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Solution Overview
Problem
Traditional cyclonic handheld vacuum cleaners face issues with debris clogging due to the 'knife-edge' transition between cyclone sidewalls and dust bins, leading to reduced performance.
Innovation Solution
The design incorporates a flow-diverting wall and a duct system that guides debris away from the cyclone dirt outlet, eliminating the 'knife-edge' and preventing clogging, along with a ramp to direct debris towards the dirt collection region and a shroud to inhibit air flow and re-entrainment of debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional cyclone design with knife-edge transition is used, then the structure is simple, but debris clogging occurs at the cyclone dirt outlet
Solution Approach 1:
The cyclone chamber is divided into distinct functional zones: an upper separation zone with spiral flow for particle separation, and a lower collection zone with downward flow for debris accumulation. The flow-diverting wall creates a clear separation between these zones, preventing debris from being re-entrained in the upward spiral flow at the knife-edge transition.
Solution Approach 2:
A flow-diverting wall is introduced as an intermediary structure between the cyclone sidewall and the dust bin. This wall redirects the debris flow away from the knife-edge transition zone and guides it smoothly into the dirt collection region, eliminating the clogging problem while maintaining structural simplicity.
2Manufacturing precision
If debris is effectively separated from air flow, then separation efficiency improves, but debris may be re-entrained in the air flow
Solution Approach 1:
The design utilizes dynamic flow patterns where the spiral flow in the upper zone provides strong centrifugal force for separation, while the downward flow in the lower zone naturally transports debris away from the outlet. The flow-diverting wall dynamically redirects debris based on the flow conditions, preventing re-entrainment while maintaining high separation efficiency.
3Shape
If the cyclone chamber is oriented horizontally, then the first and second end walls intersect a common horizontal plane, but debris may accumulate unevenly
Solution Approach 1:
The cyclone chamber employs asymmetric flow patterns within the horizontal orientation. The spiral flow enters tangentially and creates asymmetric centrifugal forces that effectively separate debris from air. The flow-diverting wall is positioned asymmetrically to guide debris toward the designated collection region, ensuring uniform debris distribution despite the horizontal chamber orientation.
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 enhances the separation efficiency, reduces clogging, and maintains airflow cleanliness by guiding debris effectively into the dirt collection region while minimizing re-entrainment and pressure drop.
Implementation Method 1
a cyclone chamber in the fluid flow path. The cyclone chamber includes a first end wall and a second end wall, a cyclone chamber axis passing through the first end wall and the second end wall
Implementation Method 2
The first end wall and the second end wall of the cyclone chamber both intersect a common horizontal plane when the handheld vacuum cleaner is positioned on a horizontal surface
Implementation Method 3
a fluid flow motor positioned in the fluid flow path. The fluid flow motor is positioned between the dirt collection region and the handle
Data Source
AI summary
A vacuum cleaner including a dirty air inlet, a fluid flow path extending from the dirty air inlet to a clean air outlet, a fluid flow motor positioned in the fluid flow path, and a filter assembly positioned in the fluid flow path. The filter assembly including a first cylindrical filter and a second cylindrical filter nested within and removable from the first cylindrical filter. An inner diameter of the first cylindrical filter is smaller than an outer diameter of the second cylindrical filter such that the second cylindrical filter is compressed in order to be nested within the first cylindrical filter.