Patent ID: 9689107
Date: 2017-06-27
CPC Classifications: A47L,D06F,Y10T

Claim:
1. An apparatus for detecting an error in a measurement of a water level in a washing machine, comprising: a water level sensor measuring a water level in a washing tub; a water supply device supplying water into the washing tub; a drain device discharging water from the washing tub; and a control unit controlling the water supply device and the drain device to adjust an actual water level in the washing tub, and detecting a measurement error of the water level sensor based on a water level change measured by the water level sensor while the actual water level is adjusted, wherein the control unit compares a first water level measured by the water level sensor to a preset water level, and controls the drain device to discharge the water in the washing tub for a preset time when the first water level is higher than the preset water level, or controls the water supply device to supply water to the washing tub for the preset time when the first water level is equal to or lower than the preset water level, and wherein the control unit detects the measurement error of the water level sensor when a water level measured by the water level sensor in real time has not changed, and wherein the control unit controls the water supply device and the drain device for a preset time, and detects the measurement error of the water level sensor when a calculated water level difference between the first water level measured before the preset time and a second water level measured after the preset time is less than a reference value.