Abstract: A washing water supply apparatus for a dish washing machine which is capable of concurrently supplying washing water to both upper and lower spray arms or selectively supplying the washing water to either the upper spray arm or the lower spray arm based on the washing amount of dishes. The apparatus includes a casing for guiding washing water in a washing water flow path in order to convert a part of the washing water flow into a cross-flow, an orifice tube for increasing the flowing speed of the washing water introduced into the casing and discharging the same, a valve ball for opening/closing an orifice of the orifice tube, and movable in the interior of the casing in accordance with a flow direction of the washing water, and an actuator having a moving member for moving the valve ball toward the orifice.

Abstract: A pulsator with an improved structure having a punching function is used in a washing machine. The pulsator of the present invention is composed such that a rotating member has a guiding dimple formed on its upper end surface, and an elevating member has a guiding protrusion projected from the inner surface. According to this pulsator, non-symmetrical water flow and up-and-down water flow can be generated easily so that the entanglement of the washing articles can be minimized, and the washing is carried out effectively.