Washing process for an automatic dishwashing machine
AssigneeZanussi Elettrodomestici S.p.A.
InventorClaudio Milocco
Life of this patent
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Abstract
A washing process for an automatic dishwashing machine, includes the steps of feeding a predetermined volume of water into the wash tub of the machine, adding a predetermined amount of detergent to the water to form a washing solution, heating the so formed washing solution, and subjecting the articles to be washed to the chemical and a mechanical action of the washing solution. After having reached a predetermined temperature, the washing solution is partially discharged and is replenished with a corresponding quantity of water. The detergent is added in two steps, respectively, before and after the partial discharge of the washing solution.
Claims5
In an automatic dishwashing machine having a wash tub, a method for washing articles disposed in the tub during a wash phase of a cycle of the machine, said method comprising:
- feeding a predetermined volume of water into the wash tub;
- dispensing a metered amount of detergent into the wash tub so that a washing solution is formed by the water and the detergent;
- causing the washing solution to become heated to a first predetermined temperature of at least 50.degree. C.;
- subjecting the articles in the wash tub to the heated washing solution;
- discharging a portion of the washing solution from the bottom of the tub after the washing solution has attained said first predetermined temperature to remove dirt from the tub which has been released from the articles and has accumulated at the bottom of the tub, said portion of the washing solution having a volume of at most 1/5 of said predetermined volume of water fed into the tub;
- subsequently heating the washing solution in the tub to a second predetermined temperature greater than said first predetermined temperature;
- spraying the articles in the wash tub with the washing solution after the washing solution has been heated to said second predetermined temperature;
- subsequently discharging substantially all of the washing solution from the wash tub.
Dependencies are inferred from the claim text.