Suction Nozzle Wiper Lip Geometry for Low-Loss Dirt Pickup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hard-surface suction devices require large suction units for effective cleaning, leading to high energy consumption and noise, and are prone to flow losses and vortex formation, which can result in inefficient dirt and water pickup.
Innovation Solution
A suction nozzle with flexible wiper lips of varying thickness and arcuately curved side walls, along with a unique suction channel geometry that reduces flow losses and vortex formation, allowing for effective suction with a smaller negative pressure source and rechargeable energy, such as a lithium-ion battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large-sized suction unit is used to achieve strong suction flow, then the suction performance is improved, but the device occupies more space, consumes more energy, and generates more noise
Solution Approach 1:
The suction channel features arcuately curved side walls that guide the suction flow smoothly from the suction mouth toward the suction unit. This curved geometry reduces flow separation and turbulence, minimizing energy losses and enabling effective suction with a smaller, more energy-efficient vacuum source
2Productivity
If a large-sized suction unit is used to achieve strong suction flow, then the suction performance is improved, but the device occupies more space
Solution Approach 1:
The arcuate side walls create a streamlined flow path that maximizes suction efficiency within a compact channel volume, eliminating the need for a large suction unit while maintaining effective cleaning performance
3Device complexity
If conventional suction channel geometry is used, then the structure is simple, but flow losses increase and vortex formation occurs, reducing suction efficiency
Solution Approach 1:
The arcuately curved side walls replace conventional straight or angular geometries, creating smooth flow transitions that prevent flow separation and vortex formation. This curved design reduces turbulent losses while maintaining structural simplicity, enabling efficient suction flow with minimal energy expenditure
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 design achieves an effective suction flow with low energy consumption, minimizing flow losses and vortex formation, ensuring efficient dirt and water pickup while maintaining a compact and portable device.
Implementation Method 1
a suction flow can be achieved by means of the suction unit, so that dirt and water can be sucked off the hard surface through the suction mouth and transferred to a dirt container
Implementation Method 2
the recesses on one of the two front edges define flow passages in which the suction flow has a high flow rate, so that dirt particles and/or liquid droplets can be entrained particularly effectively
Implementation Method 3
the flow losses in the suction channel can be significantly reduced by providing arcuately curved side walls, so that an effective suction flow can be achieved even with a relatively small-sized negative pressure source
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Suction nozzle (50), in particular for a hard surface suction device, with a suction mouth (70) to which a suction channel (60) is connected, at the end of which a vacuum source (16) can be connected to form a suction flow, wherein the suction channel (60) has a bottom wall (82) and a top wall (83) which are connected to each other via arcuately curved side walls (84, 85). The suction nozzle (50) comprises two flexible wiper lips (62, 65) that define the suction mouth (70), wherein one of the two wiper lips (62) has recesses (78) on its free leading edge (73) projecting from the suction channel (60), and wherein at least one of the two wiper lips (62) has a plurality of protrusions (79) in the region of the suction mouth (70), facing the other wiper lip (65), wherein the protrusions (79) are arranged only over a partial region of the wiper lip (62).