Multi-Inlet Cyclone Header Design to Reduce Vacuum Backpressure
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Solution Overview
Problem
Existing vacuum cleaners, particularly hand vacuum cleaners, face challenges with high backpressure in the air flow path, which affects efficiency and performance.
Innovation Solution
The design incorporates a header upstream of the cyclone, distributing air evenly to multiple cyclone inlets, and optimizes the flow path and cyclone geometry to reduce backpressure, along with a tapered screen member and eccentric cyclone positioning to enhance dirt separation and collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cyclone inlet is used in existing vacuum cleaners, then the structure is simple, but high backpressure is generated in the air flow path
Solution Approach 1:
The single cyclone inlet is divided into multiple cyclone inlets (first cyclone inlet and second cyclone inlet) that are distributed around the cyclone chamber. This segmentation allows air to enter through multiple paths, reducing backpressure while maintaining a relatively simple overall structure.
Solution Approach 2:
Different regions of the cyclone chamber are provided with different inlet characteristics. The first cyclone inlet has a first inlet area and the second cyclone inlet has a second inlet area, allowing optimized local flow distribution to reduce overall backpressure.
2Device complexity
If air flow path is not optimized, then the structure is simple, but airflow efficiency is reduced due to high backpressure
Solution Approach 1:
The air flow path is segmented into multiple independent paths, each leading to a different cyclone inlet. This allows air to be distributed through multiple routes simultaneously, improving overall airflow efficiency without requiring a complex reconfiguration of the entire system.
Solution Approach 2:
The cyclone inlets are arranged in different spatial positions and orientations around the cyclone chamber. By utilizing three-dimensional space for inlet distribution, the system improves airflow efficiency without significantly increasing structural complexity.
3Device complexity
If unequal air distribution to cyclone inlets is used, then the flow path configuration is simple, but dirt separation efficiency is reduced
Solution Approach 1:
Each cyclone inlet is designed with specific inlet areas (first inlet area and second inlet area) that are optimized to achieve approximately equal air distribution. This local optimization ensures efficient dirt separation without requiring complex flow path configurations.
Solution Approach 2:
The inlet areas of the cyclone inlets are specifically designed and adjusted to control air distribution. By changing the geometric parameters (inlet areas) of the cyclone inlets, the system achieves balanced air flow distribution to improve dirt separation efficiency.
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 design reduces backpressure, improves airflow efficiency, and enhances dirt separation and collection, resulting in improved performance and efficiency of the vacuum cleaner.
Implementation Method 1
a cyclone having a first cyclone inlet, a second cyclone inlet, a cyclone outlet and a cyclone axis of rotation centrally located in the cyclone and extending between a first end of the cyclone and a second end of the cyclone
Implementation Method 2
the cyclone having a first cyclone air inlet having a first outlet port, a second cyclone air inlet having a second outlet port
Implementation Method 3
an air flow path from a dirty air inlet to a clean air outlet with a cyclone and a fan and motor assembly in the air flow path
Data Source
AI summary
A surface cleaning apparatus has a cyclone with multiple cyclone air inlets, and a header that is upstream of at least some of the cyclone air inlets.