Suction cleaner with a dedusting control for the filter
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Solution Overview
Problem
Existing dirt vacuum cleaners with cleaning control systems for filters face high energy consumption due to the need for strong electromagnets to counteract suction pressure during the cleaning process, leading to increased power consumption and potential valve fluttering.
Innovation Solution
The introduction of an intermediate chamber connected upstream of the main filter, which is vented during the cleaning process to equalize pressure, reduces the negative pressure acting on the valve disk, minimizing the actuating force required for the switching valve and preventing valve fluttering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lifting magnet is supplied with high current intensity to counteract suction pressure on the valve disk, then the valve remains closed against opening movement, but energy consumption increases significantly
Solution Approach 1:
A pressure equalization chamber is introduced as an intermediary between the suction chamber and the valve disk. This chamber equalizes the pressure distribution, reducing the net suction pressure force acting on the valve disk. The lifting magnet only needs to overcome the weight of the valve rod and minor pressure differences, not the full suction pressure, thereby significantly reducing energy consumption while maintaining reliable valve closure.
Solution Approach 2:
The pressure distribution parameter around the valve disk is changed by introducing the pressure equalization chamber. Instead of having full suction pressure differential across the valve disk, the system creates a more balanced pressure environment, reducing the force that the lifting magnet must counteract and thus reducing power consumption.
2Reliability
If the lifting magnet exerts high lifting force to hold the valve closed against suction pressure, then the valve remains sealed, but the valve device experiences fluttering
Solution Approach 1:
The pressure equalization chamber acts as a mediator that stabilizes the pressure forces acting on the valve disk. By equalizing pressures, it eliminates the unstable pressure differential that causes fluttering, allowing the valve to remain sealed with minimal lifting magnet force, thus achieving both sealing and positional stability.
3Reliability
If the valve rod is actuated to close the valve against suction pressure, then the cleaning position is achieved, but the actuating force required increases
Solution Approach 1:
The pressure equalization chamber serves as an intermediary that reduces the net force required to actuate the valve rod. By balancing pressures on either side of the valve disk, it minimizes the resistance force that the actuating mechanism must overcome, thereby reducing the required actuating force while ensuring reliable valve closure.
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 significantly reduces the power requirement of the lifting magnet or comparable control devices while ensuring stable open and closed positions of the valve, thereby lowering energy consumption and preventing valve fluttering.
Implementation Method 1
a valve arrangement is arranged in the area of this intermediate chamber, which produces pressure equalization between the pressure chamber and the intermediate chamber in the cleaning position
Implementation Method 2
Each changeover valve was actuated electromagnetically and consisted of a lifting magnet which actuated a valve rod
Data Source
Figure 1
Figure 2
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AI summary
A method for operating a suction-type cleaner, in which, in a manner controlled in the filter dedusting position by an electromagnetically actuated switchover valve arrangement (19, 20, 21), at least one filter (9), through which the dirt-laden air flow passes, is dedusted in the opposite direction to said air flow, and the dirt-laden suction air from the dirt-collecting container (1) firstly passes through the at least one filter (9) which is adjoined, in the flow direction, by a suction chamber (12), which is adjoined downstream by an intermediate chamber (26) which is arranged on the suction side of the turbine (30), and a pressure chamber (34) is arranged downstream of the turbine (30), wherein, in order to reduce the actuating force of the switchover valve arrangement (19, 20, 21) in the dedusting position of the suction-type cleaner, the pressure between the pressure chamber (34) and the intermediate chamber (26) is equalised.