Dishwasher using steam to heat cold wash and rinse waters and spray them against dishes during the wash and rinse cycles

In a dishwashing machine having a wash/rinse compartment for receiving a dish-carrying basket;

• a tank disposed beneath said compartment;
• a water containing boiler positioned beneath said tank with heating means in said boiler for generating steam;
• a source of unheated water connected to said tank;
• an aspirating nozzle connected to said boiler for receiving steam therefrom and extending into said tank with a water inlet communicating with said tank, a wash/rinse arm mounted on said nozzle;
• time controlled means for actuating said boiler heating means for generating steam and delivering same through said aspirating nozzle for withdrawing water from said tank and entraining same with said steam and propelling said steam and water through said spray arm over the dish-carrying basket for a predetermined period of time during a washing cycle;
• a detergent supply positioned beneath said tank;
• and
• a conduit having time controlled valving means therein connecting said detergent supply with said aspirating nozzle for withdrawing a supply of detergent and entraining same with said steam and water for delivery to said wash/rinse arm.