US Patent 9801522 Dish washer and control method thereof

A dish washer including a sump unit disposed below a wash tub and configured to collect water, and an upper nozzle, a lower nozzle, and a subsidiary nozzle configured to spray water received from the sump unit onto dishes/cutlery contained in at least one rack. The sump unit includes a circulating pump configured to pump water collected in the sump unit, and a distributing element configured to allow water pumped by the circulating pump to be sprayed through any one of the lower nozzle and the subsidiary nozzle, and to be sprayed selectively through the upper nozzle. Accordingly, it is possible to independently perform an intensive wash mode of spraying water only through the subsidiary nozzle.