Rotating Disc Dirt Separator for Low Pressure Drop Vacuum Cleaners
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Solution Overview
Problem
Conventional dirt separators for vacuum cleaners, such as porous bags and cyclonic separators, face issues like clogging, high pressure drops, and large size, which affect suction and efficiency.
Innovation Solution
A dirt separator with a rotating disc that imparts tangential forces to dirt-laden fluid, allowing effective separation without the need for cyclonic flow, maintaining high efficiency in a compact design with reduced pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a porous bag is used as a dirt separator, then the structure is simple, but the pores quickly clog with dirt during use reducing suction
Solution Approach 1:
The patent employs a rotating disc with holes that spins at high speed to dynamically clear dirt from the separation path. The rotation creates centrifugal force that prevents dirt accumulation on the disc surface, maintaining continuous airflow through the holes without clogging, thus resolving the contradiction between simple structure and reliable suction performance
Solution Approach 2:
The rapidly rotating disc generates mechanical vibrations and centrifugal forces that actively prevent dirt from adhering to the disc surface. This dynamic mechanical action keeps the holes clear of dirt while maintaining the simplicity of the separator structure, addressing both the structural simplicity and reliability requirements
2Manufacturing precision
If a cyclonic separator is used to achieve high separation efficiency, then the separation performance is improved, but the pressure drop becomes high and the device size increases
Solution Approach 1:
The patent extracts the essential separation function from the complex multi-stage cyclonic system and implements it through a single rotating disc with holes. This isolated component performs the separation task efficiently without requiring the long fluid paths and multiple stages of traditional cyclonic separators, thereby reducing pressure drop while maintaining separation efficiency
Solution Approach 2:
The rotating disc introduces dynamic motion to the separation process, using centrifugal force generated by rotation to enhance separation efficiency. This dynamic approach achieves effective dirt removal in a single stage with shorter fluid path, reducing both the pressure drop and device size compared to static multi-stage cyclonic systems
3Manufacturing precision
If a cyclonic separator is used with high fluid speeds to achieve high separation efficiencies, then the separation performance is improved, but the pressure drop increases
Solution Approach 1:
The rotating disc converts mechanical rotation into centrifugal force that acts on the dirt particles. This dynamic mechanism enhances separation efficiency through centrifugal effects without requiring high fluid speeds through the separator, thus improving separation performance while minimizing pressure drop associated with high-speed fluid flow
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 achieves high separation efficiency at low fluid speeds with reduced pressure drop and no significant reduction in suction, making it suitable for handheld and stick vacuum cleaners.
Implementation Method 1
the rotating disc, which imparts tangential forces to the fluid
Implementation Method 2
the dirt, owing to its greater inertia, continues to move outwards and collects at the bottom of the chamber
Data Source
AI summary
A dirt separator for a vacuum cleaner includes a chamber having an inlet through which dirt-laden fluid enters and an outlet through which cleansed fluid exits the chamber. A disc located at the outlet rotates about a rotational axis and comprises holes through which the cleansed fluid passes. The inlet is defined by an end of an inlet duct that extends within the chamber, and a separation distance between the centre of the inlet and the centre of the disc is no greater than the diameter of the inlet.