Vacuum Cleaner Roller Design to Reduce Plowing and Pushing Force
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Solution Overview
Problem
Conventional vacuum cleaners face challenges in effectively removing larger debris without plowing it and maintaining suction efficiency, as traditional designs either lead to air leaks or increased force required to push the cleaner due to contact with the surface.
Innovation Solution
A vacuum cleaner design featuring a rotatable roller outside the suction nozzle, which rotates independently and maintains contact with the surface to prevent plowing, while a suction nozzle with a seal minimizes air leaks and focuses airflow for efficient debris ingestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction nozzle contacts the surface to be cleaned, then suction efficiency is improved, but the force required to push the cleaner increases
Solution Approach 1:
The front section of the suction nozzle is separated into an independent roller that can rotate freely, while the main body of the nozzle remains fixed. This segmentation allows the roller to contact the surface without transmitting pushing force to the entire nozzle assembly, maintaining suction efficiency while reducing the force required to move the cleaner.
Solution Approach 2:
The front portion of the suction nozzle is made rotatable rather than fixed, allowing it to dynamically adapt to surface contact. The roller can rotate to accommodate surface variations and debris, maintaining consistent suction contact without requiring additional pushing force to overcome static friction or deformation resistance.
2Ease of operation
If the suction nozzle is raised to avoid plowing debris, then ease of operation is improved, but air leaks increase reducing suction efficiency
Solution Approach 1:
The suction nozzle is divided into a fixed rear portion and a rotatable front portion with roller. The fixed portion maintains the seal and prevents air leaks, while the rotatable roller portion can be raised slightly to roll over debris without plowing, combining sealing integrity with ease of operation over various surfaces.
3Productivity
If a traditional brushroll agitator is used, then debris agitation is improved, but the device complexity increases
Solution Approach 1:
The traditional motor-driven brushroll agitator is removed entirely. Instead, the front roller itself serves the agitation function by mechanically rolling over and lifting debris into the suction path through its rotation and contact with the surface, eliminating the need for a separate agitator mechanism.
Solution Approach 2:
The front roller is designed to perform multiple functions simultaneously: it maintains the suction seal, rolls over debris to prevent plowing, agitates debris through its rotation and contact, and supports the front of the cleaner. This multi-functionality eliminates the need for separate brushroll agitators and other components.
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 ingests larger debris without plowing and maintains suction efficiency by minimizing air leaks and reducing the force needed to push the cleaner, enhancing cleaning performance and maneuverability.
Implementation Method 1
a suction source fluidly connected to the suction chamber for generating a working air stream through the suction chamber
Implementation Method 2
a rotatable roller mounted in the roller chamber for rotation about a roller axis, wherein the roller is in engagement with the curved wall of the roller chamber
Implementation Method 3
the roller is in engagement with the curved wall of the roller chamber and a portion of the roller protrudes through the open forward portion of the roller chamber
Data Source
AI summary
A vacuum cleaner for removing debris from a surface to be cleaned includes a suction chamber having a suction nozzle opening, a source of suction in fluid communication with the suction chamber, a brushroll provided within the suction chamber, and a roller provided in a roller chamber in front of the brushroll.