Rotatable brush for surface cleaning apparatus
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Solution Overview
Problem
Hair, string, or other strand-like debris often becomes embedded or entangled in the bristles of a typical brush roll, impairing its performance and requiring manual dislodging, which is time-consuming and undesirable.
Innovation Solution
A rotatable brush roll with leading and trailing hair blocking members, flexible elastomeric strips, or sheaths to inhibit debris from embedding in the bristles, and a heating element to thermally degrade wound debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a brush roll with bristles is used for surface cleaning, then debris can be effectively dislodged and conveyed towards the inlet, but hair and string-like debris become embedded in the bristles, impairing performance
Solution Approach 1:
The brush roll is segmented into distinct functional zones: a first portion with bristles for debris dislodging, and a second portion with a different surface characteristic (smoother, less prone to entanglement) for debris conveyance. This segmentation allows each zone to perform its specific function optimally without the bristles throughout the entire roll causing entanglement issues.
Solution Approach 2:
Different portions of the brush roll have different local qualities: the first portion has bristles with specific properties for effective debris dislodging, while the second portion has a modified surface quality (smoother texture, different material properties) that reduces hair and string entanglement. This local quality variation resolves the contradiction by providing the right properties in the right locations.
2Ease of operation
If bristles are used to agitate debris, then cleaning effectiveness is improved, but hair and string debris become entangled requiring manual removal
Solution Approach 1:
The brush roll is divided into a first portion with bristles for agitation and a second portion with reduced entanglement characteristics for debris transport. This segmentation ensures that while bristles provide effective agitation, the transition to the second portion naturally sheds hair and string debris, eliminating the need for manual removal and saving user time.
Solution Approach 2:
The invention converts the potential harm of bristle entanglement into a benefit by designing the second portion to actively shed entangled debris. The rotational motion that causes entanglement in traditional brushes now works in favor by forcing debris off the smoother second portion, transforming the problem into a self-cleaning mechanism that saves time.
3Productivity
If a uniform bristle surface is used on the brush roll, then debris dislodging is effective, but strand-like material becomes wound about the brush roll
Solution Approach 1:
The brush roll surface is segmented into two distinct portions: the first portion with bristles optimized for debris dislodging, and the second portion with a different surface configuration that prevents strand-like material from winding around the roll. This segmentation addresses both requirements simultaneously by locating each function in its appropriate zone.
Solution Approach 2:
The brush roll employs local quality variation where the first portion has bristle characteristics for effective dislodging, while the second portion has modified surface properties (smoother, different texture) that locally prevent entanglement and winding of hair and string debris, thus resolving the contradiction between dislodging effectiveness and entanglement prevention.
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
Prevents debris from embedding in the bristles, allowing for easy dislodging and reduces the need for manual intervention, enhancing the brush roll's efficiency and convenience.
Implementation Method 1
a heating element to thermally degrade wound debris
Data Source
AI summary
A surface cleaning apparatus has a rotatably mounted brush. The brush has first and second microfiber pads separated by bristles.