Multi-cyclone dust collecting device and vacuum cleaner including same
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Solution Overview
Problem
The multi-cyclone dust collecting device in wireless vacuum cleaners experiences increased pressure loss, which reduces the suction force and cleaning performance, while attempts to minimize pressure loss often compromise separation efficiency.
Innovation Solution
The design incorporates a primary cyclone with multiple secondary cyclones, each featuring multiple inlets protruding tangentially from the outer surface, which reduce pressure loss while maintaining separation efficiency by allowing air to enter in a tangential direction, maximizing centrifugal force and utilizing a hollow cylindrical structure with a truncated cone and top plate configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of secondary cyclones is increased to improve separation efficiency, then separation efficiency is improved, but pressure loss increases
Solution Approach 1:
The dust collecting device is segmented into a primary cyclone for coarse dust separation and multiple secondary cyclones for fine dust separation. This segmentation allows each cyclone to be optimized for its specific function, with secondary cyclones having smaller dimensions suitable for fine particle capture while maintaining overall system efficiency.
Solution Approach 2:
Multiple secondary cyclones are arranged in a radial pattern around the central axis, utilizing spatial distribution in the radial dimension. This arrangement allows parallel processing of air streams through multiple cyclones simultaneously, increasing total separation capacity while managing pressure loss through distributed flow paths.
2Loss of energy
If the inlet cross-sectional area is reduced to minimize pressure loss, then pressure loss is reduced, but separation efficiency decreases
Solution Approach 1:
The inlet is segmented into multiple smaller inlet passages distributed around the cyclone body rather than a single large inlet. This segmentation maintains adequate total inlet area for separation efficiency while each individual passage creates appropriate flow velocity and reduces overall pressure loss through distributed entry points.
Solution Approach 2:
Different regions of the cyclone are given different inlet characteristics - the secondary cyclones have optimized inlet angles and passage areas specifically tailored for fine dust separation, while the primary cyclone has larger inlets suited for coarse dust. This local optimization ensures each region operates at peak efficiency for its designated function.
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 effectively reduces pressure loss while maintaining separation efficiency comparable to conventional systems, enhancing the vacuum cleaner's performance by minimizing pressure loss to 90 mmH2O from 175 mmH2O, as demonstrated in experimental results.
Implementation Method 1
a multi-cyclone dust collecting device using centrifugal force is used as a dust collecting device for collecting dust and dirt
Implementation Method 2
a primary cyclone that separates and collects dirt and dust from air containing dirt and dust introduced from the outside, and a plurality of secondary cyclones that separate fine dust from the air discharged from the primary cyclone
Data Source
AI summary
A multi-cyclone dust collecting device according to the present disclosure comprises: a primary cyclone formed to primarily separate contaminants from introduced contaminant-containing air; and a plurality of second cyclones which are installed in the primary cyclone so as to separate fine dust from air discharged from the primary cyclone, and each of which has a plurality of introduction ports and one discharge port, wherein the plurality of introduction ports arranged on each of the plurality of secondary cyclones protrude outward from a body of each of the plurality of secondary cyclones and are formed in tangential directions to the outer circumferential surface of the each of the plurality of secondary cyclones.