Cyclone Vacuum Cleaner Startup Valve for Filter Clog Prevention
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Solution Overview
Problem
Vacuum cleaners with cyclone separators face issues where the fan does not instantly build up the necessary volume flow for vortex formation during startup, leading to dust and dirt particles entering the cyclone and clogging after-filters and fan filters.
Innovation Solution
A valve element is placed between the pick-up device and the fan, connecting the flow path through the cyclone separator only when a predefined minimum volume flow is reached, preventing dust and dirt suction during startup and ensuring proper vortex formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fan is operated immediately at startup, then the volume flow is insufficient for vortex formation, but the dust separator cannot function properly and filters become clogged
Solution Approach 1:
The control unit activates the fan motor before the pick-up device, allowing the fan to build up sufficient volume flow and centrifugal forces in the cyclone separator before dust extraction begins. This preliminary action ensures proper vortex formation is established before dust particles are introduced to the system.
Solution Approach 2:
The system uses dynamic control of the fan motor operation, transitioning from a static on/off state to a controlled ramp-up sequence. The fan speed is gradually increased to achieve the necessary volume flow for effective dust separation, adapting the operating conditions to match the system's operational stage.
2Reliability
If the pick-up device is activated immediately, then dust and dirt particles enter the cyclone before sufficient centrifugal forces are present, but this causes filter clogging and reduced system reliability
Solution Approach 1:
The control unit activates the fan motor before the pick-up device, allowing the fan to build up sufficient volume flow and centrifugal forces in the cyclone separator before dust extraction begins. This preliminary action ensures proper vortex formation is established before dust particles are introduced to the system.
Solution Approach 2:
The control unit prevents dust particles from entering the cyclone separator during the startup phase by keeping the pick-up device inactive until sufficient centrifugal forces are established. This preliminary protective action prevents the harmful effect of particle deposition on filters before the separation system is ready to handle them.
3Reliability
If a valve element is added to control the flow path, then dust particles are prevented from reaching filters during startup, but the device complexity increases
Solution Approach 1:
The control unit performs multiple functions: it controls both the fan motor and the pick-up device, and it manages the valve element operation. By making the control unit multi-functional, the patent avoids adding separate dedicated control mechanisms for each component, thereby limiting the increase in overall system complexity.
Solution Approach 2:
The valve element acts as an intermediary component between the pick-up device and the cyclone separator, controlled by the existing control unit. This intermediary mechanism provides precise flow path control without requiring fundamental redesign of the system architecture, balancing protection functionality with acceptable complexity.
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 prevents clogging of after-filters and fan filters by ensuring that the cyclone separator operates only when sufficient centrifugal forces are present, reducing dust and dirt particles reaching downstream filters.
Implementation Method 1
the dust is separated by vortex formation in the air that is mixed with dust and dirt
Implementation Method 2
If the centrifugal forces are sufficient, only the lighter air passes through, while the heavier dust and dirt particles remain in the collecting bin of the cyclone separator
Data Source
AI summary
A method for operating a vacuum cleaner includes providing a vacuum cleaner including a motor-driven fan, a pick-up device configured to pick up an air-dust mixture that is disposed on a suction side of the fan, a dust separator including at least one cyclone separator and a valve element disposed between the pick-up device and the fan. The dust separator is disposed between the pick-up device and the fan. The valve element is operated so as to connect a flow path leading from the pick-up device through the at least one cyclone separator to the fan only when a predefined minimum value of a volume flow generated by the fan or a quantity correlating with the volume flow is present.