Carpet Extractor Suction Venting for Longer Cleaning Solution Dwell
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Solution Overview
Problem
Traditional carpet extractors often struggle to maintain an optimal dwell time of cleaning solution on soiled areas, as the suction power is constant, which can lead to inadequate cleaning efficiency, especially on heavily soiled sections.
Innovation Solution
The extractor incorporates a mechanism to temporarily reduce suction at the floor nozzle, allowing the cleaning solution to dwell longer on the surface by creating a suction vent through a leak hole in the working air conduit, which can be manually or electromechanically controlled, enabling increased dwell time without interrupting the agitation or fluid application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If suction power is maintained at constant high level, then extraction efficiency is improved, but cleaning solution dwell time is reduced
Solution Approach 1:
The suction source operates in periodic cycles, alternating between high-power extraction mode and reduced-power dwell mode. The controller periodically activates the suction source at high power to extract cleaning solution and debris, then reduces or interrupts suction to allow cleaning solution to dwell on soiled areas, creating a rhythmic pattern that balances both extraction efficiency and dwell time requirements
Solution Approach 2:
The suction source power is made dynamic rather than constant. The system adjusts suction power levels based on operational phase: high power during extraction cycles to maximize productivity, and reduced power during dwell cycles to extend cleaning solution contact time with soiled surfaces, thereby adapting the single suction source to serve dual conflicting functions
2Duration of action of moving object
If suction is temporarily interrupted, then cleaning solution dwell time is increased, but extraction productivity is reduced
Solution Approach 1:
The system implements periodic suction interruption rather than continuous operation. The controller programs alternating intervals of suction activation and interruption, where brief interruption periods allow cleaning solution to dwell on surfaces, followed by active suction periods that restore extraction productivity, maintaining overall cleaning effectiveness while preventing permanent productivity loss
3Reliability
If cleaning solution dwell time is extended, then cleaning effectiveness is improved, but extraction time is increased
Solution Approach 1:
The controller implements periodic cycles that alternate between extended dwell phases (improving cleaning effectiveness) and active extraction phases (recovering time). During dwell phases, suction is reduced or interrupted to maximize cleaning solution contact time with soiled areas, then active suction phases quickly remove the cleaning solution and debris, preventing excessive total extraction time
Solution Approach 2:
The system maintains continuous useful action by alternating between dwell and extraction modes without complete idle periods. The agitation system continues operating during both phases, and the suction source transitions smoothly between modes, ensuring that cleaning preparation and cleaning removal are continuously performed in an integrated manner that minimizes total extraction time
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
This solution enhances cleaning performance by allowing the cleaning solution to remain on the surface for a longer period, improving soil removal and overall cleaning effectiveness on soiled areas without compromising the extraction process.
Implementation Method 1
a suction source 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
Data Source
AI summary
An extractor includes a fluid recovery system including a suction nozzle, a recovery tank assembly, and a suction source having an inlet fluidly connected to the recovery tank assembly and the suction nozzle through an air conduit and adapted to draw liquid through the suction nozzle and deposit the liquid in the recovery tank assembly. The extractor includes a body provided with the air conduit for movement between a first position wherein suction is unreduced and a second position wherein suction is reduced. The extractor includes a fluid delivery system including a solution supply tank assembly, a fluid distributor, and a conduit for depositing fluid onto a surface. The extractor includes a hydraulic connector operably coupled to the body and adapted to move the body between the first and second positions.