Dryer having a filter sensing system
AssigneeLG Electronics Inc.
InventorsSoon-Jo Lee, Hae Deog Jeong
Life of this patent
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Abstract
A dryer having a filter sensing system that warns a user that a filter requires servicing is provided. The dryer includes a drum that retains laundry. Hot air is drawn through the drum (for drying) and out an exhaust casing having a filter for removing lint and other particles. The temperature difference of the air in front of the filter (on the drum side) and behind the filter is determined using temperature sensors. When that temperature difference exceeds a predetermined threshold, a control unit causes a notice unit to produce a warning signal that informs a user that filter service is required.
Claims9
A clothes dryer filter sensing system, comprising:
- a filter inside a clothes dryer exhaust casing for removing particles from exhaust air;
- an inlet temperature sensor for sensing the temperature of air entering the filter, the inlet temperature sensor being disposed within the clothes dryer exhaust casing;
- an outlet temperature sensor for sensing the temperature of air exiting the filter;
- and
- a control unit operatively connected to the inlet and outlet temperature sensors, wherein the control unit determines whether the filter requires servicing based on a temperature difference between the inlet and outlet temperature sensors.
Dependencies are inferred from the claim text.