Household dishwasher

A household dishwasher provided with a washing tub where an object to be washed is accommodated and washed, and a main body accommodating the washing tub in a structure that the washing tub is capable of being pulled in and out through an opening portion that is formed in front of the main body, the household dishwasher comprising:

• a door portion formed on an upper surface of the washing tub and configured to open and close the upper surface of the washing tub;
• a first washing water spray nozzle provided at the door portion and configured to spray washing water supplied from a door portion water supply pipe to an inside of the washing tub;
• a second washing water spray nozzle provided at a lower surface of the washing tub and configured to spray the washing water to the inside of the washing tub;
• a steam generator provided in the washing tub and configured to supply steam to the inside of the washing tub by using the washing water supplied from the first and second washing water spray nozzles;
• an ultrasonic vibration part provided at an outer surface of the washing tub and configured to apply ultrasonic vibration to the washing water inside the washing tub such that an ultrasonic washing is performed;
• and
• a controller provided inside the main body and configured to receive a washing command signal of a user and control internal components of the household dishwasher.