Separation unit for a suction device with a restricted movable flap
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Solution Overview
Problem
Existing suction devices, particularly handheld vacuum cleaners, face challenges in maintaining high suction power during prolonged use due to the inefficiencies in the flow direction of the suction air flow within the separation unit, leading to potential clogging and reduced performance.
Innovation Solution
The separation unit is designed with a flexible flap and a diversion element that guides the suction air flow in a cyclone-like manner around a central filter unit, incorporating features like a mechanical obstacle and an ejection/compression element to enhance suction power and separation efficiency by creating a helical flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the inlet opening is left open to allow sufficient airflow into the collection container, then the suction power is improved, but contaminants can fall out of the collection container when the suction device is not in use
Solution Approach 1:
A flexible flap made of elastic material is arranged at the inlet opening to cover it when no suction air flow is present, preventing contaminants from falling out. The flap is designed to be deformable under the action of suction air flow, allowing it to open and close dynamically based on operational conditions
2Adaptability or versatility
If the flap is made completely flexible to respond to airflow, then the airflow adaptation is improved, but the flap cannot provide sufficient structural support for effective flow direction control
Solution Approach 1:
The flap is divided into a first portion and a second portion along the flow direction. The first portion has higher rigidity to provide structural support and effectively control flow direction, while the second portion has higher flexibility to adapt to airflow conditions. This segmentation allows each portion to perform its specific function optimally
Solution Approach 2:
Different regions of the flap are assigned different mechanical properties: the first portion (upstream) is made stiffer for structural support and flow control, while the second portion (downstream) is made more flexible for airflow adaptation. This local differentiation of material properties resolves the contradiction between strength and adaptability
3Productivity
If the suction air flow is directed to flow cyclone-like around the filter unit, then the dust separation efficiency is improved, but the flow direction control becomes more complex
Solution Approach 1:
The flap structure is designed to automatically direct the suction air flow in a cyclone-like manner around the filter unit through its geometric configuration and positioning. The flow direction control is achieved by the flap's own structure and arrangement rather than requiring additional active control mechanisms, thereby improving dust separation efficiency while avoiding excessive structural complexity
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 significantly increases suction power and dust separation efficiency by ensuring a consistent and efficient airflow direction, reducing clogging and maintaining performance even after prolonged use.
Implementation Method 1
the suction air flow entering the collection container through the inlet opening flows in a cyclone-like manner (along the circumferential direction) around the filter unit
Implementation Method 2
The flexible flap is designed such that a force acting on the flap from the outside (in the radial direction) bends the flap away from the housing wall or the inlet opening and/or into the collection container
Data Source
Figure 1
Figure 2a~2b
Figure 2c~3a
AI summary
A separation unit (113) for a suction device (100) is described. The separation unit (113) comprises a collecting container enclosed by a housing wall (227), wherein the collecting container has an inlet opening (211) arranged on the housing wall (227) for a suction air flow (212), which is covered with a flexible flap (200). The flexible flap (200) is fastened to the housing wall (227) via a main edge (301) of the flap (200) and has a first partial region and a second partial region following along the main edge (301). The flap (200) is designed such that the flap (200) is bent away from the housing wall (227) into the collecting container by a force acting on the flap (200) from the outside, thereby exposing the inlet opening (211) at least in part.The separation unit (113) is designed such that the bending away of the first partial region of the flap (200) is more restricted than the bending away of the second partial region of the flap (200).