Vacuum Cleaner Filter Cleaning Control for Adaptive Aging Compensation
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Solution Overview
Problem
Conventional vacuum cleaning devices lack a method to account for filter wear and aging when controlling filter cleaning, leading to unsuitable cleaning times, reduced suction power, and potential damage to turbine and fan components.
Innovation Solution
A method that determines differential pressure values to adjust reference values for needs-based filter cleaning, considering filter wear and aging by comparing current and initial pressure states, allowing for adaptive filter cleaning based on real-time conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If filter cleaning is performed at regular time intervals, then the filter is cleaned periodically, but filter wear and aging are not taken into account leading to suboptimal cleaning quality
Solution Approach 1:
The patent implements dynamic adaptation of the reference value based on filter aging. The control unit automatically adjusts the reference value upward as the filter accumulates operating hours, transforming the static time-based cleaning approach into a dynamic system that adapts to the filter's actual condition and performance degradation over time.
Solution Approach 2:
The patent changes the parameter used for cleaning control from a fixed time interval to a dynamic reference value that evolves with filter aging. By modifying the reference value parameter based on operating hours and performance data, the system optimizes cleaning timing to match the filter's actual state rather than using a static schedule.
2Reliability
If filter cleaning is performed frequently, then the filter remains clean, but the negative pressure must be reduced causing interruptions in dust suction
Solution Approach 1:
The patent uses feedback from differential pressure measurements to determine when cleaning is actually needed. The control unit continuously monitors the pressure difference across the filter and compares it against the dynamic reference value, initiating cleaning only when the actual differential pressure exceeds the threshold, thus avoiding unnecessary frequent cleanings that would interrupt dust suction.
Solution Approach 2:
The system performs preliminary assessment of filter condition by continuously monitoring differential pressure before initiating cleaning. By evaluating the actual filter state against the adapted reference value in advance, the system determines the optimal cleaning moment, preventing both premature cleaning that would interrupt suction and delayed cleaning that would compromise filter effectiveness.
3Productivity
If filter cleaning is delayed, then dust suction continuity is maintained, but the filter becomes heavily clogged reducing suction power and potentially damaging turbine and fan
Solution Approach 1:
The continuous monitoring of differential pressure provides real-time feedback on filter clogging status. The control unit compares this feedback against the dynamically adjusted reference value that accounts for filter aging, enabling timely cleaning intervention before the filter becomes heavily clogged and causes damage to turbine and fan components while maintaining suction continuity as long as possible.
4Device complexity
If the reference value is fixed, then the control logic is simple, but it cannot account for filter wear and aging
Solution Approach 1:
The patent transforms the static reference value into a dynamic parameter that automatically adapts to filter aging through a systematic increase based on operating hours. This dynamic adjustment mechanism maintains relatively simple control logic while significantly improving the system's ability to account for filter wear and aging, as the adaptation follows a predetermined rule-based approach rather than requiring complex real-time analysis.
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 approach ensures efficient, adaptive filter cleaning that optimizes the number of cleaning cycles, minimizes interruptions in dust suction, and maintains effective filtration, thereby extending the lifespan of vacuum cleaner components.
Implementation Method 1
the turbine generates a suction flow by providing a negative pressure in the vacuum cleaner
Implementation Method 2
the fan or the turbine is usually preceded by filters or filter elements in order to filter out any dust that has remained in the suction flow
Implementation Method 3
the filter elements are flushed with a counter-current flow and in this way loosen any filter cake that may be present
Data Source
Figure 1
AI summary
The present invention relates to a method for controlling a cleaning process in a vacuum cleaner, wherein the vacuum cleaner comprises at least one filter that is cleaned regularly. The proposed method particularly enables demand-based, differential pressure-dependent filter cleaning, which can also take filter aging or wear into account. In a second aspect, the invention relates to a vacuum cleaner with which the proposed control method can be carried out. For this purpose, the vacuum cleaner can particularly include a filter cleaning unit.