公开(公告)号：US20220056627A1

公开(公告)日：2022-02-24

申请号：US17309863

申请日：2019-12-24

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jun Hoe CHOI ,  Tae-Gyu KIM ,  Ji-Hoon HA ,  Jeong Su HAN

IPC: D06F33/36 ,  D06F34/22 ,  D06F21/04 ,  G01N15/06

Abstract: An aspect of the present disclosure is to provide a washing machine that detects contamination of water due to a dye and prevents contamination of laundry due to the dye. The washing machine includes a tub; a drum configured to be rotatable inside of the tub; a detergent supplier configured to supply a detergent to the tub; a water supplier configured to supply a water to the tub; an optical sensor provided under the tub, wherein the optical sensor includes a light emitting element and a light receiving element configured to selectively receive a plurality of visible rays having different wavelengths and an infrared ray among a light emitted from the light emitting element; and a controller configured to control the water supplier to supply the detergent and the water to the tub and rotate the drum during a washing. In addition, the controller may reduce the washing time based on the sum of the received intensities of the plurality of visible rays and the received intensity of the infrared ray.