Wet Vacuum Cleaner Head with Guide Channels to Reduce Water Pooling
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Solution Overview
Problem
Wet vacuum cleaners with reduced footprints face issues with water puddling, especially when stationary, as the airflow can pull water towards the suction nozzle, leading to puddle formation and curved water traces during movement, particularly on sharp turns, without effective forces to remove the water.
Innovation Solution
The cleaning head design incorporates inward projections with guide channels that create a region of greater spacing than the minimum spacing between the rotary brushes, promoting lateral airflow to prevent pooling and curved traces, and features support wheels positioned to allow airflow without blocking, ensuring efficient water pickup and reduced puddle formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the footprint of the cleaning head is reduced to consume less power and improve maneuverability, then energy consumption decreases and ease of operation improves, but water pickup capability deteriorates leading to puddle formation
Solution Approach 1:
The housing is segmented into multiple regions with different spacing characteristics: a first region with minimum spacing, a second region with greater spacing formed by a first projection and guide channel, and a third region with greater spacing formed by a second projection and guide channel. This segmentation allows different zones to perform different functions - the minimum spacing region for compactness and the greater spacing regions for effective water pickup and airflow generation.
2Volume of moving object
If the spacing between the housing and floor is minimized to reduce footprint, then device compactness improves, but airflow generation deteriorates causing water to pool on the floor
Solution Approach 1:
Different regions of the housing have different spacing qualities tailored to their specific functions. The first and second regions have minimum spacing for compactness, while the second and third regions have greater spacing created by projections with guide channels. These localized quality variations enable the housing to simultaneously achieve compact overall dimensions while providing sufficient airflow velocity in specific zones for effective water pickup.
3Ease of operation
If the cleaning head is moved at sharp turns, then maneuverability improves, but curved water traces are generated due to centrifugal forces
Solution Approach 1:
The guide channels act as intermediary structures that facilitate controlled airflow between the housing and floor. During sharp turns, these guide channels help manage the airflow patterns and water movement, reducing the formation of curved water traces by providing a structured path for air and water interaction, thereby mitigating the harmful effects of centrifugal forces during maneuvering.
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 effectively reduces puddling and curved water traces by promoting inward airflow, ensuring efficient water pickup and maintaining high airflow rates, even during sharp turns, while maintaining a compact and maneuverable cleaning head.
Implementation Method 1
Suction is applied at least to the space between the brushes to draw up liquid from the floor
Implementation Method 2
the water is picked up using a capillary effect of the brush tufts themselves. When a brush tuft hits the floor, it momentarily has no centrifugal acceleration, so it is then able to soak in some water via capillary effects
Implementation Method 3
The rear brush is for example fed with water continuously, so that it will fling water around continuously, both to the inner housing, to the floor, as well as to the front brush
Implementation Method 4
the first projection having a first guide channel creating a first region of greater spacing than the minimum spacing; and a second projection extending inwardly from the second side wall into said space, the second projection having a second guide channel creating a second region of greater spacing than the minimum spacing
Data Source
Figure 1~3
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Figure 6~7
AI summary
A cleaning head for a wet vacuum cleaner has first and second rotary brushes, each extending across a width of a housing. The housing comprises a first projection extending inwardly into a space between the brushes and having a first guide channel creating an air cavity over the floor, and a second projection extending inwardly the said space. The second projection has a second guide channel creating another cavity over the floor. These cavities promote lateral air flow into the space between the brushes and thereby reduce pooling of water.