Suction apparatus and separating unit for a suction apparatus having a flap with restricted movement
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Solution Overview
Problem
Existing suction apparatuses, such as handheld vacuum cleaners, face challenges in maintaining high suction power during prolonged use due to blockages and inefficiencies in the flow direction of the suction air flow within the separating unit.
Innovation Solution
The separating unit incorporates a flexible flap with restricted movement, where the first portion of the flap is more restricted in bending than the second portion, and a deflection element to guide the suction air flow helically around the longitudinal axis, enhancing suction power and separation quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the suction air flow is introduced into the separating unit and guided inside the separating unit to increase suction power, then the suction power is improved, but the flow direction control becomes more complex and difficult to maintain
Solution Approach 1:
The patent employs a flexible membrane (folie) that can bend and deform under suction pressure to dynamically guide the airflow. This thin film structure replaces complex rigid flow control mechanisms, simplifying the device while maintaining effective flow direction control for enhanced suction power.
Solution Approach 2:
The flexible membrane is designed to dynamically adapt its shape based on the suction pressure applied. As suction power increases, the membrane bends more significantly, automatically optimizing the flow path without requiring external control mechanisms, thus managing complexity while improving performance.
2Reliability
If a flexible flap is used to cover the inlet opening to improve flow control, then the flow directionality is improved, but the flap movement becomes uncontrolled leading to performance degradation
Solution Approach 1:
The flexible membrane is selectively anchored only at specific locations (leading edge and portions at free ends) rather than being fully constrained. This localized anchoring provides sufficient flow direction control while allowing the membrane to naturally deform and self-regulate its movement in response to suction pressure, preventing uncontrolled flapping.
Solution Approach 2:
The flexible membrane uses the suction pressure itself as the control mechanism. The pressure differential across the membrane automatically regulates its position and shape, eliminating the need for external actuators or complex control systems. The membrane self-adjusts to maintain optimal flow directionality under varying suction conditions.
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 configuration improves suction power and dust separation efficiency by ensuring a consistent high-performance operation even after prolonged use, reducing the need for frequent cleaning and maintaining optimal airflow directionality.
Implementation Method 1
the flexible flap is configured such that the flexible flap is bent away from the housing wall into the collecting container by an external force acting on the flexible flap
Implementation Method 2
the suction air flow is introduced into the separating unit and/or guided inside the separating unit, such that the suction air flow flows inside the separating unit in the manner of a cyclone
Data Source
AI summary
A separating unit for a suction apparatus includes a collecting container enclosed by a housing wall. The collecting container has an inlet opening for a suction air flow disposed on the housing wall, which is covered with a flexible flap. The flexible flap is fastened to the housing wall at a leading edge of the flap and has a first portion and a subsequent second portion along the leading edge. The flap is configured to be bent into the collecting container away from the housing wall by an external force acting on the flap and as a result exposes the inlet opening at least in part. The separating unit is configured such that the bending away of the first portion of the flap is more greatly restricted than the bending away of the second portion of the flap. A suction apparatus having the separating unit is also provided.