Liquid-Based Lint Collection to Reduce Dryer Airflow Restriction

The patent extracts the lint capture function from the traditional screen filter and relocates it to a lint collection reservoir positioned at the rear of the dryer. This reservoir captures lint directly from the air-lint combination before it reaches the front screen filter, removing the harmful airflow restriction problem while maintaining lint capture effectiveness. The reservoir is connected to the exhaust duct and positioned to intercept lint-laden air flow.

The patent introduces a liquid-based intermediary system in the lint collection reservoir that uses liquid (water or other liquids) to trap and collect lint particles. This liquid intermediary captures lint more effectively than the screen filter alone while allowing air to pass through, thereby maintaining dryer efficiency. The liquid creates a barrier that lint particles cannot penetrate, while air flows around it.

The patent implements a self-service liquid replenishment system where the liquid in the lint collection reservoir is automatically replenished from a water supply line. The system includes a float mechanism or level sensor that detects when the liquid level is low and automatically opens a valve to replenish the liquid, eliminating the need for manual intervention. This self-service feature significantly reduces maintenance frequency and effort.

The patent performs preliminary action by pre-positioning the lint collection reservoir at the rear of the dryer where lint accumulation is most severe, and pre-filling it with liquid before operation begins. The system is pre-configured with connections to the water supply and exhaust duct, so it is ready to capture lint immediately without requiring setup or adjustment during operation.

The patent segments the lint removal function into two separate components: a rear lint collection reservoir that handles the bulk of lint capture from the exhaust air, and a front screen filter that handles remaining lint. This segmentation allows the majority of lint to be removed in a location where it does not restrict airflow through the dryer drum, while the front filter handles only minimal residual lint, maintaining optimal airflow and energy efficiency.

The patent uses hydraulic principles by introducing liquid into the lint collection reservoir to trap lint particles. The liquid creates a hydraulic barrier that lint particles cannot penetrate, while air flows around the liquid-filled reservoir. This pneumatic-hydraulic approach allows effective lint capture without creating the airflow restrictions associated with solid screen filters, thereby maintaining dryer energy efficiency.