Floor Cleaner Shutoff Float Mechanism for Fluid Level Management
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Solution Overview
Problem
Existing floor cleaners lack an efficient mechanism to manage fluid levels during cleaning, leading to ineffective fluid containment and potential over-suction of fluid, which can result in inefficient cleaning and operational issues.
Innovation Solution
The floor cleaner incorporates a recovery tank with a shutoff float mechanism that includes a float body, closure, and interconnecting members. This mechanism allows the float to move between positions, controlling airflow through the suction air outlet based on fluid levels in the recovery tank, thereby preventing over-suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a vacuum cleaner operates without a fluid level management mechanism, then continuous suction can be maintained, but fluid over-suction occurs leading to operational issues and inefficient cleaning
Solution Approach 1:
The float mechanism provides continuous feedback on fluid level in the recovery tank. When fluid reaches a predetermined level, the float rises and triggers the shutoff mechanism to close the airflow, automatically preventing over-suction. This feedback loop ensures the system self-regulates without user intervention, maintaining both cleaning efficiency and operational reliability.
Solution Approach 2:
The shutoff float mechanism is self-actuating and requires no external control or user intervention. The float automatically responds to fluid level changes and triggers the shutoff closure mechanism, allowing the system to manage its own fluid containment and prevent over-suction independently.
2Quantity of substance
If no shutoff mechanism is used, then the vacuum cleaner structure remains simple, but fluid containment becomes ineffective and over-suction occurs
Solution Approach 1:
The float acts as an intermediary element that translates fluid level information into mechanical action. It connects the fluid level condition to the shutoff closure mechanism, providing an simple yet effective means of controlling airflow based on fluid quantity without requiring complex electronic or mechanical systems.
Solution Approach 2:
The shutoff mechanism is self-actuating through the float's natural buoyancy response to fluid level. The system uses the fluid's own weight and buoyancy force to trigger the shutoff, eliminating the need for external power sources, sensors, or complex control systems.
3Speed
If the float is retained in the first position, then air flow is maintained for continuous cleaning, but fluid over-accumulation occurs when reaching predetermined level
Solution Approach 1:
The float mechanism dynamically adjusts airflow based on fluid level conditions. The float can occupy multiple positions (first position allowing airflow, second position blocking airflow) and transitions between them automatically as fluid level changes. This dynamic behavior enables the system to maintain optimal air flow during normal operation while automatically preventing fluid over-accumulation.
Solution Approach 2:
The float provides continuous feedback on fluid level to the shutoff mechanism. When fluid reaches the predetermined level, the float's position change triggers the closure to block airflow, creating a feedback loop that prevents further fluid accumulation while maintaining cleaning effectiveness during normal operation.
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 shutoff float mechanism effectively manages fluid levels by inhibiting airflow when the fluid reaches a predetermined level, preventing additional fluid from entering the recovery tank and ensuring efficient cleaning operations.
Implementation Method 1
The shutoff float includes a float body... The float is positionable between a first position and a second position... In the first position the first interconnecting member engages the second interconnecting member to retain the closure a predetermined distance from the suction air outlet
Data Source
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AI summary
A floor cleaner including a recovery tank. The recovery tank is configured to contain a fluid drawn through a suction inlet from a surface to be cleaned by a vacuum source. The recovery tank includes a shutoff float. The shutoff float is movable between a first position and a second position. The shutoff float includes a float body, a float closure, and a first interconnecting member. The first interconnecting member engages a second interconnecting member to retain the float in the first position. In the first position, the shutoff float is spaced a distance from the suction air outlet, allowing air flow through the suction air outlet. The first interconnecting member engages the second interconnecting member to retain the shutoff float in the first position. In the second position, the shutoff float is adjacent the suction air outlet, inhibiting air flow through the suction air outlet.