Patent ID: 7237563

Claim:
A dish washer comprising: a cabinet having a door in one side thereof; a washing chamber provided to an inside of the cabinet; a water supplier that supplies, filters and pumps washing water supplied from an outside of the cabinet; a piping that guides the washing water pumped by the water supplier to supply washing water to the washing chamber; a plurality of arms that spray the washing water supplied into the washing chamber by guidance of the piping to wash the dishes; and a controller that controls a washing water flow passage in the middle of the piping control a flow passage of the washing water with a ball moving by water pressure and gravity, to supply the washing water to at least one of the arms, wherein the piping comprises: a supply pipe that receives the washing water pumped at the water supplier that supplies the washing water, and branch pipes branched from the supply pipe to the arms, wherein the controller is provided to a portion where the supply pipe and the branch pipes join, and wherein the controller that controls a washing water flow passage comprises: an inlet tube connected to the supply pipe, a first tube extended upward from the inlet tube, a second tube extended slanted upward from the inlet tube, a third tube extended upward from a top of the second tube, a fourth tube connected between the first tube and the third tube in a downward slanted direction, a first outlet tube formed on a top of a portion where the first tube and the fourth tube join, and connected to one of the branch pipes, a second outlet tube formed on a top of the third tube, and in communication with a second arm connected to the other one of the branch pipes, a ball configured to move in the first, second, third, or fourth tube by a washing water pressure and gravity, and open/close the first or second outlet tube selectively; a ball seat provided to an inside of the inlet tube to seat the ball, and a valve provided to one side of the first tube to selectively block passage of the ball.