Vacuum Floor Tool Airflow Layout for Low-Profile Dirt Pickup
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Solution Overview
Problem
Existing floor tools for vacuum cleaners, particularly those designed for carpeted floors, face challenges in achieving effective pick-up performance while maintaining a compact size and efficient power consumption, with previous designs either being expensive and power-hungry or bulky due to the inclusion of air ducts and multiple suction channels.
Innovation Solution
A surface treating head with a main body featuring first and second suction channels bounded by working edges, an air duct open to the atmosphere interposed between them, and a fluid flow path extending from the first suction channel to the second and then to an outlet, allowing for improved airflow and agitation without increasing the tool's size, along with features like lint pickers and a bleed valve for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a driven brush or air turbine is used to agitate the floor surface, then pick-up performance on carpeted floors is improved, but the tool becomes more expensive and consumes power
Solution Approach 1:
The patent replaces the driven brush mechanism (mechanical agitation) with a passive working edge that utilizes the vacuum cleaner's suction force and the user's pushing motion to agitate the carpet surface. This substitution eliminates the need for motors or air turbines, thereby reducing power consumption while maintaining effective pick-up performance through the interaction of the working edge with carpet fibers during forward and backward strokes
Solution Approach 2:
The working edge is designed to be self-actuating, utilizing the natural motion of the user pushing and pulling the tool along the floor surface. The agitation action is generated automatically by the relative movement between the working edge and the floor covering, without requiring external power sources. The tool serves itself by converting the user's mechanical input directly into cleaning action
2Productivity
If an air duct is interposed between suction channels to improve pick-up performance, then dirt and dust collection is enhanced, but the overall size and profile of the tool increases
Solution Approach 1:
The air duct is positioned to extend between the upper and lower surfaces of the main body, utilizing the vertical dimension rather than expanding the tool's horizontal profile. This allows air to be drawn in from both sides of the suction channels while maintaining a compact and streamlined tool design that fits under furniture and does not increase in overall length or width
3Productivity
If multiple suction channels are provided to improve airflow distribution, then pick-up performance is enhanced, but the device complexity increases
Solution Approach 1:
The suction system is divided into multiple discrete suction channels, each bounded by working edges, allowing independent airflow paths that improve dirt and dust collection from different areas of the floor surface. This segmentation enables better distribution of suction force across the tool width while maintaining a relatively simple overall structure through modular channel design
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 solution enables a more streamlined and effective pick-up performance comparable to driven brush tools, with improved agitation and dirt collection, while maintaining a low profile and efficient power usage, and is applicable to various vacuum cleaner types and cleaning applications.
Implementation Method 1
a fluid flow path in the suction cavity extending from the first suction channel to the second suction channel, and from the second suction channel to the outlet
Implementation Method 2
the agitation effect of the tool is increased... A further enhancement of agitation may be effected by extending at least one of the working edges
Data Source
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AI summary
A surface treating head in the form of a floor tool(10) for a vacuum cleaner comprises a main body (12), a suction cavity (20) and an outlet (34). The suction cavity (20) comprises first and second suction channels (22, 24), bounded on both sides by respective working edges (40, 42, 44, 46). A fluid flow path (56) extends from the first suction channel (22) to the second suction channel (24) and from there to the outlet (34). The plurality of suction channels permits effective pick-up of dirt, which may be further enhanced by an air duct in the form of a slot (48), which draws air over some of the working edges (42, 44). The invention permits a tool with a lower profile to be manufactured than would be achievable by providing separate flow paths between the respective channels and the outlet.