Movable Squeegee Nozzle for Consistent Fluid Recovery
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Solution Overview
Problem
Conventional carpet extractors lack an efficient mechanism for delivering and recovering cleaning fluids while effectively agitating the surface, leading to incomplete cleaning and increased user effort.
Innovation Solution
A surface cleaning apparatus with a base for movement across the surface, a fluid delivery system, and a fluid recovery system featuring a suction nozzle assembly with a squeegee that slides within the nozzle assembly as the base moves, ensuring thorough fluid distribution and recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional carpet extractor uses a fixed nozzle assembly, then the structure is simple, but the cleaning effectiveness is reduced due to inconsistent fluid distribution and poor surface agitation
Solution Approach 1:
The squeegee is made movable within the nozzle assembly, allowing it to slide forwardly and rearwardly relative to the base movement. This dynamic configuration enables the squeegee to maintain consistent contact with the surface while the base moves, ensuring uniform cleaning action and fluid distribution across the entire cleaning width, thereby improving cleaning effectiveness without requiring complete redesign of the nozzle assembly
2Productivity
If the squeegee is fixed in the nozzle assembly, then the device complexity is low, but the fluid recovery is incomplete leading to increased user effort
Solution Approach 1:
The squeegee is configured to move within the suction nozzle assembly in response to base movement, creating a dynamic scraping action that continuously engages with the surface. This movement ensures complete fluid removal by preventing pooling or missed areas, significantly improving fluid recovery efficiency while adding only minimal structural complexity through guide rails and mounting mechanisms
3Manufacturing precision
If the squeegee contacts the surface continuously, then cleaning consistency is improved, but the device complexity increases due to the movable mounting mechanism
Solution Approach 1:
The squeegee mounting mechanism allows the squeegee to move forwardly and rearwardly within the nozzle assembly while maintaining continuous surface contact. The guide rails and simple mounting structure enable this movement without complex actuators or control systems, achieving consistent cleaning action through mechanical design rather than active control
Solution Approach 2:
The squeegee movement is passively driven by the base movement itself, with the squeegee sliding within the nozzle assembly as the base moves across the surface. This self-service mechanism eliminates the need for separate drive mechanisms, motors, or control systems, maintaining simplicity while ensuring consistent cleaning throughout the entire cleaning width
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 apparatus provides efficient delivery and recovery of cleaning fluids, enhancing cleaning effectiveness and reducing user effort by ensuring consistent contact between the cleaning solution and the surface.
Implementation Method 1
a source of suction in fluid communication with the working air conduit to draw the cleaning fluid from the surface to be cleaned and through the nozzle and the working air conduit to the recovery tank
Implementation Method 2
a squeegee provided in the suction nozzle assembly and adapted to contact a surface to be cleaned as the base moves across the surface to be cleaned
Data Source
AI summary
A surface cleaning apparatus has a base configured to be moved across a surface to be cleaned, a fluid delivery system, and a fluid recovery system with a suction nozzle assembly defining a fluid flow path. A squeegee is provided in the suction nozzle assembly and is mounted within the fluid flow path to slide forwardly and rearwardly within the suction nozzle assembly as the base is moved rearwardly and forwardly, respectively.