Vacuum Cleaner Head Brush Bar Sealing for Large Debris Pickup
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Solution Overview
Problem
Conventional cleaner heads for vacuum cleaners push large debris across surfaces rather than drawing it in due to the close proximity required for effective pick-up performance.
Innovation Solution
A cleaner head design featuring a brush bar with radially extending bristles and a deformable sealing material between them, which seals against the housing and supports the bristles to maintain air flow restriction, allowing for effective pick-up of debris while preventing large items from being pushed across the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sole plate is positioned close to the surface being cleaned to maintain pick-up performance, then fine dust and small debris are effectively drawn in through the suction opening, but large debris is pushed across the surface rather than being drawn in
Solution Approach 1:
The front opening is segmented into two functional zones: an upper region that allows large debris to pass through without being pushed, and a lower region that maintains the close proximity needed for effective pick-up of fine dust and small debris. This segmentation resolves the contradiction by allowing different types of debris to be handled differently through the same opening.
Solution Approach 2:
Different regions of the front opening are given different qualities/functions. The upper front opening region is optimized for allowing large debris passage, while the lower region maintains the sealing and suction characteristics needed for fine dust pickup. This local differentiation resolves the contradiction between handling different debris sizes effectively.
2Productivity
If the brush bar is positioned to seal against the housing to restrict air flow through the front opening, then pick-up performance is improved, but the risk of debris being flung upward by the brush bar increases
Solution Approach 1:
The problem of debris being flung upward is solved by adding a spatial dimension - the guard structure extends forwardly over the top of the brush bar to form an overhead barrier. This three-dimensional arrangement contains the debris within the housing chamber and prevents it from being flung upward, while still allowing the brush bar to seal against the housing for effective pickup performance.
3Object-affected harmful factors
If a guard structure is added to prevent debris from being flung upward, then the harmful effect is reduced, but the device complexity increases
Solution Approach 1:
The guard structure serves multiple functions simultaneously: it prevents debris from being flung upward, defines the front opening geometry to control airflow, and works with the brush bar sealing arrangement to maintain the pressure differential needed for effective pickup. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 ensures effective pick-up of both small and large debris and dust, maintaining sealing effectiveness and preventing debris from being flung upward or pushed across the surface, enhancing cleaning performance on hard floors.
Implementation Method 1
The sealing material may be a deformable material. In particular, the sealing material may be a resiliently deformable material.
Implementation Method 2
the bristles contact the surface being cleaned
Data Source
AI summary
A cleaner head for a vacuum cleaner including an agitator in the form of a brush bar, the brush bar including a plurality of radially extending bristles and a sealing material disposed between the bristles. The sealing material extends over substantially the entire circumferential and axial extent of the regions of the brush bar between the bristles. The cleaner head further includes a housing defining a chamber which at least partially surrounds the brush bar, a dirty air inlet in a lower part of the chamber and a front opening that exposes the brush bar at the front of the housing. The brush bar is supported for rotation with respect to the housing and arranged in the chamber such that the brush bar seals against the housing thereby restricting flow of air through the front opening.