Surface cleaning apparatus
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Solution Overview
Problem
Existing surface cleaning apparatuses face inefficiencies in agitating and removing debris from surfaces, particularly due to limitations in brushroll design, which affects the effectiveness of suction in drawing debris through the suction inlet.
Innovation Solution
The brushroll design incorporates ribs extending from a cylindrical portion with angled faces and brush members that form specific angles relative to the cylindrical portion, allowing for improved sweeping action and debris agitation, enhancing the interaction with the surface being cleaned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional brushroll design is used, then the structure is simple, but the debris removal efficiency is insufficient
Solution Approach 1:
The brushroll is segmented into multiple functional zones along its length, with each zone having ribs with different orientations and brush member configurations. This segmentation allows different sections to perform specialized functions (sweeping, agitating, lifting) thereby improving overall debris removal efficiency without requiring an entirely complex new design
Solution Approach 2:
The invention introduces helical ribs that extend along the longitudinal axis of the brushroll, adding a third dimension to the traditional radial brush configuration. This helical arrangement creates a screw-conveying action that propels debris toward the suction inlet while simultaneously agitating the surface, thereby improving debris removal efficiency through dimensional enhancement
2Duration of action of moving object
If brush members are arranged radially only, then the structure is simple, but the contact time with surface is insufficient
Solution Approach 1:
The brush members are arranged at varying angles relative to the radial direction, creating a dynamic sweeping pattern as the brushroll rotates. This dynamic arrangement ensures that brush members continuously engage with the surface at optimal angles, maximizing contact time and effectiveness without requiring complex mechanical adjustments
Solution Approach 2:
The helical ribs are positioned to pre-sweep and guide debris toward areas where brush members will make contact. This preliminary action prepares the surface and positions debris for more effective engagement by subsequent brush members, thereby extending the effective contact time and improving overall cleaning efficiency
3Productivity
If ribs are not helical, then the manufacturing is simple, but the sweeping action is insufficient
Solution Approach 1:
The helical ribs are designed with specific pitch and angle parameters that optimize the sweeping and conveying action. By carefully selecting these geometric parameters, the invention achieves effective debris propulsion and surface agitation while maintaining manufacturability through standard machining processes and conventional materials
Data Source
AI summary
A surface cleaning apparatus comprises a brushroll that rotates about an axis. The brushroll defines a cylindrical portion and the axis extends centrally through the cylindrical portion. The brushroll also includes a rib that extends in a direction away from the axis. The rib includes a face extending along a line that is collinear with a secant through the cylindrical portion. A brush member extends from the face.