Motor Impedance Dust Detection in Cleaning Apparatus

The patent replaces complex optical detection systems with a simplified electrical impedance-based detection method. Instead of using optical transmitters, receivers, and complex signal processing circuits to detect dust particles, the invention uses a detecting device to measure the impedance of the motor, which changes as debris accumulates on the filter. This substitution of mechanical/optical detection with electrical measurement resolves the contradiction by achieving accurate debris measurement through a simpler electrical system.

The patent introduces motor impedance as an intermediary parameter to indirectly measure debris accumulation. Rather than directly detecting dust particles or filter blockage, the system measures the electrical impedance of the motor, which serves as a mediator that reflects the degree of debris accumulation. This intermediary approach allows for simplified detection while maintaining measurement precision, as the impedance change correlates with debris levels without requiring direct optical or mechanical sensing of the debris itself.

The patent replaces energy-intensive optical detection systems with a passive electrical impedance measurement system. Optical transmitters and receivers require continuous power to emit and detect light signals, whereas the impedance-based detection system uses minimal energy to measure electrical properties of the motor. This substitution resolves the contradiction by achieving dust detection capability through a low-energy electrical measurement approach that monitors motor impedance changes caused by debris accumulation.

The patent enables the motor itself to serve as the detection sensor by utilizing its inherent electrical impedance characteristics. Instead of requiring separate, energy-consuming optical detection components, the system leverages the motor's own electrical properties as the sensing mechanism. The motor's impedance naturally changes with debris accumulation, allowing the system to detect dust levels using the motor's own characteristics without additional energy-intensive sensing components.

The patent implements a feedback-based filter replacement system that monitors motor impedance in real-time and provides information about actual filter clogging status. Instead of using fixed-time or arbitrary replacement schedules, the system continuously measures impedance changes and compares them against predetermined thresholds, providing feedback on when filter replacement is actually needed. This feedback mechanism resolves the contradiction by enabling filter replacement decisions based on actual performance degradation rather than conservative time-based scheduling, thereby maintaining cleaning efficiency while reducing premature filter disposal.

The patent performs preliminary detection of filter clogging status through impedance measurement before cleaning efficiency is significantly degraded. By monitoring impedance changes continuously, the system can detect the onset of filter blockage and alert users to replace the filter at the optimal moment - before it severely impacts performance but while the filter is still functional. This preliminary action approach prevents both premature replacement (reducing waste) and delayed replacement (maintaining efficiency), resolving the contradiction through timely intervention based on actual filter condition.