Air Purifier Filter Lifespan Calculation Using Motor Current Sensing

The patent replaces the mechanical/time-based lifespan calculation method with an electrical measurement method. Instead of tracking service time and applying coefficients, the system uses an ammeter to detect real-time current consumption of the motor, which directly reflects the filter core's clogging status. This substitution of measurement approach significantly improves accuracy while maintaining operational simplicity.

The patent introduces current consumption as an intermediary parameter to indirectly measure filter core clogging degree. Rather than directly measuring filter dirtiness, the system measures the electrical current required to drive the motor, which increases as the filter becomes clogged. This intermediary measurement provides accurate lifespan determination without complex direct observation of filter condition.

The patent uses motor current consumption as an intermediary indicator to measure filter core clogging. The ammeter detects current changes, which serve as a reliable proxy for filter pollution degree. This approach achieves accurate measurement without requiring complex direct sensing of filter condition, balancing measurement precision with system simplicity.

The system continuously monitors motor current consumption and uses this feedback to determine filter core status. The real-time current data provides ongoing information about filter clogging progression, enabling dynamic adjustment of replacement timing recommendations and improving overall measurement accuracy compared to static time-based methods.