Vacuum Nozzle Dual-Drum Brush Layout for Wall-Edge Suction
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Solution Overview
Problem
Vacuum cleaners face inefficiencies in dust suction around walls due to torque loss and reduced effectiveness in cleaning various surfaces, as the agitator's negative pressure is disrupted when it contacts walls, leading to incomplete dirt collection.
Innovation Solution
A nozzle assembly for a vacuum cleaner featuring a pair of drums with main and auxiliary brushes, driven by a driving member, and a lifting mechanism that adjusts the position of the drums based on the surface type, minimizing torque loss and enhancing dust suction performance around walls by optimizing brush position and contact with the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the agitator is installed in the nozzle assembly to effectively clean carpet surfaces, then carpet cleaning performance is improved, but dust suction performance around walls deteriorates due to negative pressure disruption
Solution Approach 1:
The single agitator is divided into two separate drums, each independently rotatable. This segmentation allows the first drum to handle carpet cleaning while the second drum maintains functionality near walls, resolving the contradiction between carpet cleaning effectiveness and wall-area dust suction performance
Solution Approach 2:
The lifting member enables dynamic adjustment of the drums' positions, allowing them to be raised or lowered based on surface type. This dynamic capability allows the system to optimize performance for both carpet surfaces and wall areas, preventing negative pressure disruption in critical regions
2Area of stationary object
If the drum brushes contact the surface to maximize cleaning area, then cleaning coverage is improved, but torque loss increases reducing brush effectiveness
Solution Approach 1:
The lifting member provides dynamic control over brush contact with the surface, allowing the drums to be raised when torque loss becomes excessive and lowered when maximum cleaning area is needed, thus balancing cleaning coverage with energy efficiency
Solution Approach 2:
The system changes the contact parameter between brushes and surface by adjusting drum position through the lifting member, optimizing the balance between cleaning area coverage and torque loss prevention
Data Source
AI summary
A nozzle assembly for a vacuum cleaner includes a driving member including a first driving shaft and a second driving shaft in both sides thereof, a first drum of which one end is coupled to the first driving shaft to be driven by directly receiving driving force of the first driving shaft, and a second drum of which one end is coupled to the second driving shaft to be driven by directly receiving driving force of the second driving shaft.