Washing machine and control method thereof

摘要

A washing machine and control methods thereof to enhance washing quality, even when using eco-friendly natural soap-based detergent. Controlling a rinse water temperature based on a wash water temperature to reduce a temperature difference therebetween prevents gelation caused by natural soap-based detergent and maximizes washing quality when using this type of detergent.

主权项

1. A control method of a washing machine using either a synthetic detergent or a natural soap-based detergent and comprising a rotatable drum in which laundry is received, comprising:
judging which one of a washing course using the synthetic detergent or a washing course using the natural soap-based detergent is selected; if it is determined that the washing course using the natural soap-based detergent is selected, detecting a temperature of wash water in the drum; setting a temperature of rinse water to be within a predetermined temperature difference or less from the detected wash water temperature so as to prevent gelation of the natural soap-based detergent; performing at least one rinsing operation with the set rinse water temperature; detecting a turbidity of the rinse water; and comparing the detected rinse water turbidity with a reference turbidity such that a rinsing operation using cold water is performed regardless of the set rinse water temperature if the rinse water turbidity is the reference turbidity or less.