Multi-Cyclone Dust Collector With Inclined Inlets for Low Pressure Loss
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Solution Overview
Problem
Existing dust collectors in vacuum cleaners face challenges in efficiently separating dust and fine dust due to the limitations of tangential and axial cyclones, which result in either high pressure loss or difficulty in producing guide vanes, necessitating a structure that combines the advantages of both while minimizing their disadvantages.
Innovation Solution
A dust collector with a multi-cyclone structure comprising a primary cyclone part for separating dust and a secondary cyclone part for separating fine dust, featuring a casing member with inclined inlet flow paths that direct air to flow eccentrically from the center of the vortex finder, and guide vanes that generate a swirling flow to separate contaminants effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a tangential inflow cyclone is used, then the structure is simple and easy to install in restricted space, but a large pressure loss occurs due to eccentric high-speed flow
Solution Approach 1:
The patent applies local quality by creating a differentiated flow path structure within the cyclone. The inlet flow path is positioned to create an inclined flow that transitions from eccentric to more uniform flow, while the guide vane structure provides localized swirling action. This local modification of flow characteristics reduces pressure loss in specific regions without requiring complete structural redesign.
Solution Approach 2:
The patent employs dynamics by using a guide vane structure that actively shapes the airflow. The guide vane creates a controlled swirling flow that adapts to the incoming air stream, transforming the static cyclone structure into a dynamic flow control system. This dynamic flow management reduces energy loss while maintaining separation efficiency.
2Loss of energy
If an axial cyclone is used, then the flow rate is appropriate and pressure loss is low, but it is difficult to produce a guide vane
Solution Approach 1:
The patent applies segmentation by dividing the cyclone into distinct functional zones: an inlet section, a guide vane section, and a separation section. The guide vane is designed as a separate, modular component that can be independently manufactured and assembled. This segmentation simplifies production by allowing the guide vane to be made using standard manufacturing processes rather than requiring complex integrated forming.
3Device complexity
If a single cyclone structure is used, then the device is simple, but it cannot efficiently separate both dust and fine dust
Solution Approach 1:
The patent applies segmentation by dividing the dust collection system into two distinct cyclone structures: a first cyclone for coarse dust separation and a second cyclone for fine dust separation. Each cyclone is optimized for its specific separation task, with appropriate inlet sizes, flow paths, and outlet configurations. This segmentation enables high-efficiency separation of different particle sizes while keeping each individual cyclone relatively simple in design.
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 multi-cyclone structure enhances the separation efficiency of dust and fine dust, reducing pressure loss and improving user convenience by allowing simultaneous discharge of collected dust and fine dust with a single operation, while maintaining a uniform and fast revolving flow.
Implementation Method 1
a guide vane extending in a spiral direction around an outer circumferential surface of the vortex finder and forming a revolving flow
Implementation Method 2
a first cyclone body formed by an outer case having a hollow shape and an inner case provided inside the outer case, the first cyclone body forming a first cyclone to separate contaminants from air
Data Source
AI summary
A dust cleaner includes a primary cyclone part formed by an outer case and an inner case; and a secondary cyclone part including a set of cyclones. The secondary cyclone part includes a casing member mounted on the inner case and configured to form casings of the cyclones arranged around a hollow part; and vortex finders provided inside the casings and including guide vanes extending in a spiral direction and forming a revolving flow at outer circumferential surfaces. The casing member forms inlet flow paths of the cyclones, and each of the inlet flow paths is formed in a direction inclined with respect to a direction toward a center of each of the vortex finders to enable air to flow in a direction eccentric from the center of each of the vortex finders.