Vacuum Cleaner Hose Flow Geometry for Lower Pressure Loss
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Solution Overview
Problem
Vacuum cleaner hoses for wet and dry vacuum cleaners experience high pressure and flow losses due to geometry-related wall friction and edge swirling, which impair suction efficiency.
Innovation Solution
A flow guiding geometry is integrated within the hose lumen, forming a longitudinal vortex to center and enhance the suction flow, with features such as spiral design, discrete profiled bodies, or continuous webs, which can extend over the hose's length and be welded to the inner surface, promoting efficient media transfer with reduced losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional spiral hose geometry is used, then the hose is flexible and connectable, but high wall friction and edge swirling cause severe pressure and flow losses
Solution Approach 1:
The patent applies curvature by forming a longitudinal vortex within the hose lumen using a flow guiding geometry that extends in the radial direction. This vortex creates a swirling flow pattern that centers the suction flow and reduces edge swirling losses, while the spiral hose external geometry maintains flexibility for connection purposes
Solution Approach 2:
The patent changes the flow parameters by introducing a flow guiding geometry that generates a longitudinal vortex. This vortex modifies the flow velocity distribution and pressure profile within the hose, transforming the flow from a conventional pattern with severe edge swirling to a centered, vortex-dominated flow that reduces wall friction effects
2Ease of operation
If the hose is designed as a spiral hose for flexibility, then connection ease is improved, but high wall friction occurs due to the spiral geometry
Solution Approach 1:
The patent segments the hose structure into two distinct functional parts: the external spiral geometry that provides flexibility and ease of connection, and the internal flow guiding geometry that creates a longitudinal vortex to reduce wall friction losses. This segmentation allows each part to optimize its specific function without compromising the other
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 flow guiding geometry significantly improves suction behavior by maintaining a longitudinal vortex over the hose's length, reducing overall losses and enhancing the efficiency of the vacuum cleaner system.
Implementation Method 1
By virtue of the flow guiding geometry formed within the lumen according to the invention, it is advantageously possible to achieve a longitudinal vortex form and thus centering of the suction flow
Data Source
AI summary
Vacuum cleaner hose for connecting to a wet and dry vacuum cleaner, wherein the vacuum cleaner hose has an inner lumen extending in the longitudinal direction, wherein a flow guiding geometry is formed within the lumen or adjoining the lumen, by which a suction flow occurring during the operation of the wet and dry vacuum cleaner can be influenced.