Patent ID: 7815745

Claim:
A dishwasher, comprising; a tub for receiving dishes; a sump housing which is coupled to a bottom of the tub to store washing water, the sump housing including a heater receiving portion; a nozzle assembly including an upper nozzle and a lower nozzle to spray washing water onto the dishes; a washing pump placed within the sump housing to pump out the washing water collected in the heater receiving portion, including: a pump case, whole part of which being accommodated within the heater receiving portion; and an impeller disposed in the pump case; a washing motor mounted on an outer bottom portion of the sump housing to rotate the impeller; and a heater disposed in the heater receiving portion and located adjacent the pump case, wherein the sump housing includes a first bottom surface that is lower than the upper end thereof and receives at least one of a valve and sensor thereon; and a second bottom surface that defines the heater receiving portion and is lower than the first bottom surface.