Vacuum cleaner having a conversion valve
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Solution Overview
Problem
Upright vacuum cleaners lack an efficient mechanism to switch between floor and above-floor cleaning modes without compromising suction power or airflow, as existing designs often require manual adjustments that can disrupt airflow paths and do not effectively manage airflow distribution between different cleaning surfaces.
Innovation Solution
A vacuum cleaner design featuring a valve assembly with a link and deformable portion that allows for seamless transition between floor and above-floor cleaning modes by blocking airflow through the nozzle outlet duct when switching modes, while maintaining airflow through the wand, utilizing a bypass valve to ensure continuous suction when both primary inlets are blocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a manual valve adjustment mechanism is used to switch between floor and above-floor cleaning modes, then the cleaning mode can be changed, but the airflow path is disrupted and suction power is compromised during transition
Solution Approach 1:
The valve assembly incorporates a movable valve element that dynamically opens and closes different airflow paths based on operating mode. The valve is coupled to a link mechanism that automatically positions the valve element to direct airflow through the appropriate inlet (floor or above-floor) during transitions, maintaining continuous airflow and suction power without disruption.
Solution Approach 2:
The link mechanism serves as an intermediary between the user's mode selection action and the valve element. The link translates user input into precise valve positioning, ensuring smooth transitions between cleaning modes while maintaining airflow continuity. The deformable portion of the link acts as a cushioning intermediary that absorbs transition forces and prevents airflow disruption.
2Adaptability or versatility
If the valve is designed to completely block airflow through the nozzle outlet duct when switching modes, then airflow through the wand is maintained, but the link mechanism experiences excessive movement stress
Solution Approach 1:
The link mechanism incorporates a deformable portion that acts as a pre-designed cushioning element. This deformable section absorbs excess movement stress and prevents force transmission to the valve element when the valve is in the closed position. The cushioning feature allows the link to flex during mode transitions, protecting the mechanical connection from damage while maintaining effective airflow path switching.
3Reliability
If the bypass valve is configured to open when both primary inlets are blocked, then continuous suction is maintained, but the device complexity increases
Solution Approach 1:
The bypass valve is designed as a self-actuating component that automatically opens when both the floor and above-floor inlets are blocked. The bypass valve's operation is driven by the same link mechanism that controls the main valve, requiring no additional user input or external actuation. This self-service design maintains continuous suction capability while minimizing additional complexity by reusing existing mechanical components.
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
Enables efficient airflow management and suction power distribution between floor and above-floor cleaning modes, ensuring uninterrupted cleaning performance by maintaining airflow through the wand even when the valve is closed, and preventing air from entering the wand inlet during floor cleaning.
Implementation Method 1
the link has a deformable portion resiliently deformable to permit additional movement of the link in the second direction when the valve is in the closed position
Data Source
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AI summary
A vacuum cleaner 10 includes a suction source 42, an air inlet 98, and an airflow path 62 extending from the air inlet 98 to the suction source 42. A valve 110 is movable between an open position in which the suction source 42 and the air inlet 98 are in fluid communication and a closed position in which the valve inhibits fluid communication between the air inlet 98 and the suction source 42. The vacuum cleaner 10 also includes a link 114 coupled to the valve 110 such that movement of the link 114 in a first direction when the valve is in the closed position opens the valve 110, and movement of the link 114 in a second direction when the valve 110 is in the open position closes the valve 110. The link 114 has a deformable portion 150 resiliently deformable to permit additional movement of the link 114 in the second direction when the valve 110 is in the closed position.