Vacuum Filter Flap Control for Stronger Cleaning Pulses
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Solution Overview
Problem
Existing dirt vacuum cleaners face inefficiencies in filter cleaning due to energy loss from pressure-controlled flap elements and high construction efforts with multiple valves, leading to suboptimal cleaning of filter halves.
Innovation Solution
A Y-shaped flap element controlled by a cost-effective servomotor drive, allowing for three pivoting positions, including a central operational position and separate cleaning of filter halves using a single electromagnetically actuated control flap, enabling multiple cleaning pulses to one filter half at a time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If pressure-controlled switching of flap element is used, then filter cleaning is achieved, but energy is lost for cleaning which reduces pulse strength
Solution Approach 1:
The invention extracts the flap element switching function from the pressure-controlled system and implements it separately via a servo motor drive. This separation allows the exhaust air to be used exclusively for cleaning purposes without being consumed for flap actuation, thereby extracting the harmful energy loss from the cleaning process while maintaining reliable pulse strength.
Solution Approach 2:
The servo motor-driven flap element serves multiple functions: it controls the cleaning air flow path, switches between different filter halves, and can be positioned in three distinct states (central, left, right). This multi-functionality replaces the previous pressure-controlled system that consumed cleaning energy for actuation, now allowing all exhaust air to be dedicated to cleaning while the flap provides versatile control.
2Ease of operation
If two electromagnetically controlled three-way valves are used, then switching between cleaning and suction air flow is achieved, but construction effort for chamber construction and valve control is high
Solution Approach 1:
The invention merges the functions of two separate three-way valves into a single flap element controlled by one servo motor. The Y-shaped flap element integrates the air flow control capabilities of multiple valves into one component, eliminating the need for separate chamber constructions and reducing the number of electromagnetic actuators from two to one, thereby significantly reducing construction effort while maintaining switching functionality.
Solution Approach 2:
The single servo motor-controlled flap element performs the work of two three-way valves by providing three distinct positions (central, left, right) that can achieve all necessary air flow configurations. This universal component handles both cleaning and suction air flow switching functions, as well as filter half selection, reducing overall system complexity.
3Productivity
If flap element is used to switch cleaning air flow, then filter cleaning is achieved, but cleaning efficiency is suboptimal due to energy loss
Solution Approach 1:
The invention extracts the flap actuation function from the cleaning air flow system and provides it through a separate servo motor drive. This extraction ensures that 100% of the exhaust air energy is available for cleaning purposes, removing the energy loss that previously occurred when cleaning air was used to actuate the flap, thereby maximizing cleaning efficiency.
Solution Approach 2:
The invention replaces the pressure-controlled mechanical flap actuation system with an electrically-driven servo motor system. This substitution eliminates the energy loss inherent in using pneumatic pressure to move the flap, as the electric motor provides precise control without consuming the cleaning air energy, leading to improved cleaning efficiency.
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 enhances cleaning efficiency by allowing forced switching between filter halves and reducing energy loss, enabling better cleaning of one filter half while maintaining functionality of the other, with a simpler control mechanism compared to prior art.
Implementation Method 1
an electromagnetically actuated lifting magnet being used to control this control flap
Implementation Method 2
by exploiting pressure differences between the suction air flow and the atmospheric pressure, an approximately X-shaped flap element arranged in a housing suddenly changes its position
Data Source
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AI summary
The invention relates to filter cleaning in a vacuum having a switchable flap element, the cleaning of the filter or of parts of the filter being carried out by supplying a secondary air flow to the interior of the filter to be cleaned, and air being able to flow through the filters separately from each other from the outside to the inside in the vacuum container in a sealed manner, and a flap element disposed in a chamber housing being pivotable, by means of the pivoting of which openings may be closed and released, the secondary air flow reaching the surface of the filter to be cleaned from the inside toward the outside in pulses, characterized in that the flap element comprises at least two partial flaps, the pivoting of which is actuated by a pivot drive, the respective partial flap optionally closes the outflow opening of the respective filter chamber in the direction of the intake opening of the suction turbine, the blow-out side of the suction turbine delivers the created overpressure air into an overpressure chamber in which a chamber housing is disposed, the at least one drive element to be suddenly actuated comprises openings to be opened and closed, upon the opening of which the overpressure air flows through the chamber housing optionally into an impulse channel which branches off at that location and introduces the air into one or into the other filter chamber for cleaning.