Ball Valve Airflow Switching for Upright Vacuum Cleaning Modes
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Solution Overview
Problem
Existing surface cleaning apparatuses, such as vacuum cleaners, face challenges in efficiently switching between floor and above-floor cleaning modes without compromising air flow and risking clogs or back pressure, especially when using cyclonic cleaning stages and filters.
Innovation Solution
Incorporating a ball valve in the air flow conduit that maintains the same diameter as the conduit, allowing seamless air flow and preventing clogs, and selectively connecting air flow paths to control airflow based on cleaning modes, ensuring uninterrupted suction and reducing the risk of dirt accumulation on the valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a valve is introduced to switch between floor and above-floor cleaning modes, then cleaning mode versatility is improved, but the risk of clogs and back pressure increases
Solution Approach 1:
The air flow path is segmented into multiple independent pathways: a first pathway for floor cleaning mode and a second pathway for above-floor cleaning mode. The valve selectively connects or disconnects these segments based on the desired cleaning mode, allowing versatile operation while preventing clogs by directing airflow through the appropriate clean pathway.
Solution Approach 2:
The valve acts as an intermediary component that mediates between the two cleaning modes by selectively connecting or disconnecting the first and second air flow pathways. This intermediary mechanism enables mode switching without requiring direct modification of the cleaning tools or air treatment members.
2Adaptability or versatility
If a valve is positioned in the air flow conduit to control airflow, then cleaning mode switching capability is improved, but air flow restriction and back pressure increase
Solution Approach 1:
The valve is designed with dynamic connectivity, allowing it to selectively connect or disconnect the first air flow pathway based on the cleaning mode. In above-floor mode, the valve disconnects the first pathway, allowing unrestricted airflow through the second pathway. This dynamic adjustment eliminates back pressure while maintaining mode switching capability.
3Adaptability or versatility
If the valve is used to control airflow in both cleaning modes, then mode versatility is improved, but dirt accumulation on the valve increases
Solution Approach 1:
The air flow system is segmented into a first pathway that includes the valve and is used only for floor cleaning mode, and a second pathway that excludes the valve and is used for above-floor cleaning mode. By isolating the valve to only the first pathway, dirt accumulation is minimized as the valve is not exposed to airflow from the above-floor cleaning tool.
4Volume of moving object
If the dirty air inlet of the above-floor cleaning member is sealed in storage position, then compact storage is improved, but air flow interruption occurs
Solution Approach 1:
The system employs dynamic airflow path switching: when the above-floor cleaning member is in storage position with its dirty air inlet sealed, the valve automatically connects the first air flow pathway, enabling continuous airflow for floor cleaning mode. This dynamic switching ensures productivity is maintained despite the sealed inlet in storage configuration.
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 and clog-free operation in both floor and above-floor cleaning modes by maintaining consistent air flow and preventing dirt buildup on the valve, enhancing the cleanability and mobility of the surface cleaning apparatus.
Implementation Method 1
The valve may be configured so as not to reduce the cross section of the air flow path. For example, if the valve is a ball valve, the diameter of the air flow path through the ball valve may be the same as that of the conduit Therefore, the passage of an air stream through the valve with not restrict flow.
Implementation Method 2
The air is drawn into the vacuum cleaner through a dirty air inlet and conveyed to a cyclone inlet. The rotation of the air in the cyclone results in some of the particulate matter in the airflow stream being disentrained from the airflow stream.
Implementation Method 3
the ball valve is sized so as to permit a small flow of air around the outer perimeter of the ball valve when the valve is in the closed position. This will assist in preventing dirt building up on the outer surface and impairing the mobility of the valve.
Data Source
AI summary
An upright surface cleaning apparatus is operable in a floor cleaning mode and an above floor cleaning mode. The surface cleaning apparatus includes a first upstream air flow path extending from the dirty air inlet of the floor cleaning head to a downstream air flow path, and an above floor cleaning member removably mounted to the surface cleaning apparatus. The above floor cleaning member includes an alternate dirty air inlet. The surface cleaning apparatus also includes a second upstream air flow path extending from the dirty air inlet of the above floor cleaning member to the downstream air flow path. The surface cleaning apparatus also includes a valve selectively connecting the first upstream air flow path in flow communication with the downstream air flow path when the dirty air inlet of the above floor cleaning member is placed in a storage position on the upright surface cleaning apparatus.