Cyclonic Separator Inlet Ramp for Low-Airflow Dust Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cyclonic separation devices for vacuum cleaners are not entirely satisfactory due to inefficiencies in dust and waste separation, leading to reduced performance and costly maintenance, especially in low-power devices with small motors and low airflow rates.
Innovation Solution
A cyclonic separation device with a cylindrical inner chamber and a unique inlet pipe arrangement that forms an acceleration ramp around the chamber, increasing airflow speed and efficiency by reducing the pipe section gradually, allowing for more effective centrifugal separation of dust and waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the inlet pipe section is reduced to form an acceleration ramp, then the airflow speed increases and separation efficiency improves, but the pipe complexity increases
Solution Approach 1:
The inlet pipe is segmented into multiple portions with different cross-sectional areas. The pipe includes a first portion with a larger section and a second portion with a smaller section, creating distinct zones for different flow conditions. This segmentation allows the acceleration ramp function to be integrated into the pipe structure itself, improving airflow speed while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The acceleration ramp is formed by changing the cross-sectional dimension of the inlet pipe along its length. By reducing the pipe section from the first portion to the second portion, the design utilizes dimensional variation to achieve flow acceleration without adding separate components. This approach embeds the acceleration function within the existing pipe geometry, improving speed while avoiding excessive complexity.
2Productivity
If the pipe section is reduced gradually to form an acceleration ramp, then the centrifugal separation efficiency improves, but the manufacturing complexity increases
Solution Approach 1:
The inlet pipe is divided into discrete portions with defined cross-sectional areas. The first portion has a larger section and the second portion has a smaller section, creating clear manufacturing zones. This segmentation allows each portion to be manufactured separately or as distinct features, simplifying the manufacturing process while achieving the required gradual acceleration for effective centrifugal separation.
Solution Approach 2:
The pipe design incorporates controlled parameter changes in its cross-sectional dimensions along the flow direction. By systematically varying the pipe section from the first portion to the second portion, the design achieves gradual flow acceleration that enhances separation efficiency. These parameter changes are implemented in a controlled manner that balances performance requirements with manufacturing feasibility.
3Device complexity
If the inlet pipe arrangement is simplified, then the device complexity decreases, but the airflow acceleration and separation performance deteriorate
Solution Approach 1:
The acceleration ramp function is merged with the inlet pipe structure itself. Instead of being a separate component, the acceleration ramp is formed by the varying cross-section of the inlet pipe portions. This merging integrates multiple functions (flow conveyance and flow acceleration) into a single structural element, reducing overall device complexity while maintaining effective dust and waste separation performance.
Solution Approach 2:
The inlet pipe serves multiple functions: it conveys airflow from the cyclonic chamber and simultaneously provides flow acceleration through its varying cross-section. By making the pipe multi-functional, the design avoids adding separate acceleration components, thereby reducing device complexity while ensuring adequate separation efficiency through the integrated acceleration capability.
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 solution enhances the separation efficiency of dust and waste, improving the performance of vacuum cleaners, especially in low-power models, by increasing airflow speed and reducing turbulence, thus requiring less maintenance and extending the interval between emptying cycles.
Implementation Method 1
the heaviest waste is separated from the main air flow by the centrifugal effect of the vortex flow
Implementation Method 2
an air flow is led into a cyclonic separation chamber where it follows a swirling path favorable to the separation of the waste
Implementation Method 3
the section of this pipe portion towards the final point being smaller than its section towards the initial point so as to form an acceleration ramp for the air flow
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The device has a cylindrical interior cyclonic chamber accessible by an air intake, and a separator filter located in a central part of the chamber. A tube segment (12) is located around the chamber, where the tube segment directs airflow to the air intake and the tube segment and extends from a starting point to an end point near the air intake. A cross-section of the tube segment is placed near the end point being smaller than a cross-section of the tube segment near the starting point to form an acceleration ramp for airflow between the starting point and the end point. An independent claim is also included for an upright vacuum cleaner comprising a housing installed in a handle.