Nested Cyclone Dust Separation With Low Pressure Loss
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Solution Overview
Problem
Conventional cyclone dust collecting apparatuses face challenges in separating fine dust due to low centrifugal force difference between fine dust and air, leading to inefficiencies and increased pressure loss when using multi-cyclone systems.
Innovation Solution
A cyclone dust collecting apparatus with a first cyclone that separates coarse dust and a second cyclone that further separates fine dust, utilizing an air guiding member with guiding blades to direct air flow and minimize pressure loss, while a dust collecting receptacle and sealing members ensure efficient collection and prevention of backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional single cyclone dust collecting apparatus is used, then the structure is simple, but the fine dust collecting efficiency is low due to insufficient centrifugal force difference between fine dust and air
Solution Approach 1:
The dust collecting apparatus is divided into multiple cyclones (first cyclone, second cyclone, and optionally third cyclone) that process dust-laden air in sequence. Each cyclone handles a specific stage of dust separation, with the first cyclone removing coarse dust and subsequent cyclones removing finer dust particles, thereby improving overall collection efficiency while maintaining reasonable structural complexity
Solution Approach 2:
The second cyclone is positioned inside or nested within the structure of the first cyclone, and the third cyclone may be nested within the second. This nested arrangement allows multiple cyclonic separation stages to be integrated in a compact configuration, improving fine dust collection efficiency without requiring a large horizontal footprint
2Productivity
If a multi-cyclone dust collecting apparatus is used to improve fine dust collecting efficiency, then the fine dust separation capability increases, but a great pressure loss occurs when dust-laden air is drawn from an inner cyclone to an outer cyclone
Solution Approach 1:
A communication passage is provided between the first cyclone and the second cyclone, serving as an intermediary pathway that allows dust-laden air to flow from the first cyclone to the second cyclone with minimized pressure loss. This dedicated passage design reduces turbulent flow and energy loss compared to conventional multi-cyclone arrangements
Solution Approach 2:
The communication passage is specifically designed with optimized geometry and positioning to minimize flow resistance at the critical interface between cyclones. The local structure of the passage is tailored to maintain smooth airflow transition, reducing pressure loss while enabling effective multi-stage dust separation
3Device complexity
If conventional cyclone arrangements are used, then the design is straightforward, but the pressure loss is high and fine dust separation is insufficient
Solution Approach 1:
The apparatus segments the dust separation process into multiple cyclonic stages handled by different cyclones working in sequence. This segmentation allows each cyclone to be optimized for specific dust size ranges, improving overall separation efficiency and reducing the pressure loss that would occur in a single large-cyclone design
Solution Approach 2:
Nested cyclone configuration allows compact integration of multiple separation stages, reducing the overall system size and minimizing the length of inter-cyclone air passages. This reduces the cumulative pressure loss while achieving effective multi-stage dust separation
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 apparatus achieves higher fine dust collecting efficiency with reduced pressure loss and improved dust separation, allowing for effective collection of both coarse and fine dust with enhanced operational efficiency.
Implementation Method 1
the first cyclone forcing the dust-laden air to downwardly whirl in a space under the air suction hole so as to centrifugally separate dust from the dust-laden air
Implementation Method 2
the second cyclone forcing semi-clean air entering from the first cyclone to downwardly whirl so as to centrifugally separate fine dust from the semi-clean air
Data Source
AI summary
The present disclosure relates to a cyclone dust collecting apparatus for a vacuum cleaner having a high fine dust collecting efficiency. The cyclone dust collecting apparatus includes a first cyclone having an air suction hole through which dust-laden air is drawn-in, the first cyclone forcing the dust-laden air to downwardly whirl in a space under the air suction hole so as to centrifugally separate dust from the dust-laden air; a second cyclone disposed inside the first cyclone, the second cyclone forcing semi-clean air entering from the first cyclone to downwardly whirl so as to centrifugally separate fine dust from the semi-clean air; and an air guiding member forcing the semi-clean air discharged from the first cyclone to directly enter the second cyclone and, the air guiding member having a plurality of guiding blades radially disposed in at least one circular shape based on a vertical axis of the second cyclone.