| 主权项 |
1. A dishwasher, comprising:
a tub to provide a space to hold a washing object; a spray arm having a plurality of channels for flow of the washing water, a plurality of supply holes to introduce the washing water to the plurality of channels, and spray holes to spray the washing water introduced to the channels thus toward the washing object; a chamber positioned on an underside of the spray arm to communicate with the plurality of supply holes; a flow passage guider having a first end positioned in the chamber passed through the spray arm and a second end positioned on an upper side of the spray arm; a washing water supply connected to the second end of the flow passage guider to supply the washing water to die chamber; and a flow passage change-over provided in the chamber, wherein the flow passage change-over includes: a change-over body having a cylindrical shape with an opened side and a closed side that makes a reciprocating movement and a rotating movement in the chamber according to a water pressure in the chamber, a change-over pass through hole in the closed side through which the flow passage guider passes, and channel opening holes in the closed side to open some of the plurality of supply holes according to a rotation angle of the change-over body. |
