Vacuum cleaner
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vacuum cleaners often have suction inlets that span the entire width of the cleaning path, leading to inefficient suction power distribution and increased energy consumption, while also limiting accessibility under furniture due to their design.
Innovation Solution
The vacuum cleaner features a foot assembly with counter-rotating agitators and a suction inlet that is narrower than the foot assembly, positioned rearward of the agitators' axes, creating a focused suction area and allowing for a lower profile design, along with an intermediate dirt cup for enhanced functionality and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the suction inlet spans the entire width of the cleaning path, then the suction coverage is improved, but the energy consumption increases and accessibility under furniture is reduced
Solution Approach 1:
The suction inlet is segmented into a narrower aperture positioned rearward of the agitators, rather than spanning the entire width. This segmentation allows the suction to be concentrated in a specific zone where dirt is most effectively delivered by the counter-rotating agitators, reducing the need for wide suction coverage and thereby lowering energy consumption.
Solution Approach 2:
The suction inlet is positioned with specific local quality - narrower and rearward of the agitator axes - to match the localized dirt delivery pattern created by the counter-rotating agitators. This localized suction approach improves efficiency by concentrating suction power where it is most needed rather than distributing it across the entire width.
2Area of stationary object
If the suction inlet spans the entire width of the cleaning path, then the suction coverage is improved, but the accessibility under furniture is reduced
Solution Approach 1:
The foot assembly design segments the suction function from the overall width by positioning a narrower suction inlet rearward of the agitators. This allows the front portion of the foot to be lowered for under-furniture access while the suction aperture remains optimally positioned for effective dirt ingestion.
Solution Approach 2:
The suction inlet is repositioned in the depth dimension (rearward of agitator axes) rather than maintaining full width coverage. This dimensional change allows the foot assembly to achieve a lower profile for better accessibility while maintaining effective suction through strategic positioning.
3Use of energy by moving object
If a narrower suction inlet is used, then the energy consumption is reduced, but the suction coverage area is decreased
Solution Approach 1:
The counter-rotating agitators perform preliminary action by actively sweeping and delivering dirt toward the narrower rearward-positioned suction inlet. This preliminary dirt delivery action compensates for the reduced suction aperture width, ensuring adequate coverage without requiring high energy consumption.
Solution Approach 2:
The counter-rotating agitators serve as intermediaries between the cleaning surface and the narrower suction inlet. They actively transport dirt toward the suction aperture, bridging the gap between reduced suction coverage area and effective dirt collection.
4Productivity
If counter-rotating agitators are used, then the dirt dislodging effectiveness is improved, but the device complexity increases
Solution Approach 1:
The drive assembly merges the rotation of both counter-rotating agitators into a single integrated mechanism. This combining of functions reduces the overall complexity compared to having separate drive systems for each agitator, while maintaining the effectiveness benefits of counter-rotation.
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 configuration enhances suction power efficiency, reduces energy consumption, and improves accessibility under furniture by allowing a more compact design, enabling effective cleaning with or without electrical power and easy dirt collection.
Implementation Method 1
a suction source in fluid communication with the suction inlet
Implementation Method 2
a downstream filtration system. The filtration system is configured to separate the entrained dirt from the working air flow
Data Source
AI summary
A vacuum cleaner includes a foot assembly having a suction inlet thereon, a suction source in fluid communication with the suction inlet to produce a working airflow therethrough, and a dirt container in fluid communication with the suction inlet and suction source. The foot assembly further comprises a body defined by a central portion and a pair of extension arms, a rotatable agitator on each extension arm, and a drive assembly configured to counter-rotate the agitators. The counter-rotating agitators are operable to cooperate with the suction source to direct dust and debris towards the suction inlet.