Dryer Lint Depot Detection Using Timed Rinse Signals

The patent applies preliminary action by automatically rinsing the lint filter with water before it becomes completely clogged. The control unit monitors the filter's state and initiates a rinsing cycle to remove accumulated fluff, preventing the filter from reaching a state of significant flow resistance. This proactive maintenance approach keeps the filter operating efficiently without interrupting the drying cycle.

The patent extracts the filling level detection function from complex sensor arrangements and implements it through a simpler level sensor in the water reservoir. Instead of monitoring the lint depot directly with complex sensors, the system monitors the water level in the reservoir that receives rinsed water from the lint filter. This indirect measurement approach simplifies the sensor system while maintaining adequate filling level detection capability.

The patent employs a cost-effective level sensor in the water reservoir instead of expensive detection systems. The level sensor is a simple, inexpensive component that adequately performs the filling level detection function. This approach prioritizes functional adequacy over high-precision measurement, reducing manufacturing costs while maintaining sufficient monitoring capability to prevent lint depot overflow.

The patent changes the physical state parameter of the stored fluff from dried to wet/moist. By collecting fluff in its wet state directly from the rinsing process, the fluff occupies less volume due to compaction and water displacement. The level sensor monitors the water-fluff mixture level in the reservoir, enabling adequate space management despite the volume reduction from storing wet rather than dried fluff.