Separation unit for a suction device with a inclined flow deflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing suction devices, particularly handheld vacuum cleaners, face challenges in maintaining high suction power during prolonged use due to potential clogging and inefficiencies in the air flow direction within the separation unit, leading to reduced performance over time.
Innovation Solution
The separation unit is designed with a flexible flap and a mechanical obstacle that restricts the deflection of the flap's first portion, creating a helical suction air flow around a central filter unit, enhancing suction power and separation efficiency by directing the air flow effectively around the filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the suction air flow is introduced into the separation unit to flow in a cyclone-like manner around the central filter unit, then the suction power of the suction unit is increased, but the flow direction control becomes complex and difficult to optimize
Solution Approach 1:
The inlet opening is divided into two separate openings: a first inlet opening for introducing the suction air flow into the separation unit, and a second inlet opening for introducing additional air flow to optimize the cyclone flow pattern. This segmentation allows independent control of different flow components, simplifying the overall flow direction control while maintaining high suction power
Solution Approach 2:
A deflection element is introduced as an intermediary component between the first inlet opening and the collection container. This deflection element actively redirects the suction air flow to create the desired cyclone-like flow pattern around the filter unit, thereby simplifying the flow control mechanism while achieving the required complex flow behavior
2Ease of operation
If a flap is used to cover the inlet opening, then the separation unit can control air flow entry, but the flap may deflect excessively causing flow direction instability
Solution Approach 1:
The single flap is segmented into a first flap portion and a second flap portion, each serving different functions. The first flap portion covers the first inlet opening and is restricted in its deflection, while the second flap portion covers the second inlet opening and can deflect more freely. This segmentation allows the system to maintain ease of operation while ensuring flow direction stability through the restricted first portion
Solution Approach 2:
The deflection characteristics of the flap are modified by introducing a deflection restriction element that limits the deflection angle of the first flap portion. This parameter change ensures that the flap can still respond to pressure changes for flow control (maintaining ease of operation) while preventing excessive deflection that would cause flow instability (improving reliability)
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 maintains high suction power and efficient dust separation by ensuring a consistent helical flow, reducing the risk of 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 suction air flow is introduced into the separation unit and/or guided within the separation unit in such a way that the suction air flow flows in a cyclone-like manner around the central filter unit of the separation unit
Implementation Method 3
a filter unit arranged in the collection container, which is designed to retain dirt particles from the suction air flow (entering the collection container through the inlet opening) on the surface of the filter unit
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), which extends along a longitudinal axis (220), and which has an inlet opening (211) arranged on the housing wall (227) for a suction air flow (212). The separation unit (113) is designed such that a suction air flow (212) entering the collecting container through the inlet opening (211) has a flow direction extending in the circumferential direction with respect to the longitudinal axis (220). The separation unit (113) comprises a diversion element (240) arranged downstream along the flow direction, which has a surface (503) acting on the suction air flow (212), wherein the normal vector of an inclined section (403) of the surface (503) of the diversion element (240) runs obliquely to the longitudinal axis (220).