Patent ID: 8734588
Filing Date: 2014-05-27
Classification: A47L

Abstract:
1. A dishwasher, comprising: a control device to carry out a rinsing process for cleaning rinsing stock based on a rinsing program; a rinsing chamber to receive the rinsing stock during the rinsing process; a circulating pump to circulate a rinsing liquid present in the rinsing chamber, wherein a rotational speed of the circulating pump is variable by the control device; a first spray element to apply the rinsing liquid on a first region of the rinsing chamber; a second spray element to apply the rinsing liquid on a second region of the rinsing chamber; and a duct system to conduct the rinsing liquid from the circulating pump to the first spray element and the second spray element, the duct system having a first branch to conduct the rinsing liquid to the first spray element and a second branch to conduct the rinsing liquid to the second spray element; wherein the duct system has a function, the function describing a pressure difference in dependence on the rotational speed of the circulating pump and having a lower rotational speed range in which the pressure difference changes at most in proportion to the rotational speed of the circulating pump and an upper rotational speed range in which the pressure difference changes more than in proportion to the rotational speed of the circulating pump, wherein the pressure difference is defined as a pressure of the rinsing liquid in the second spray element less a pressure of the rinsing liquid in the first spray element, the control device has a first rinsing program in which the circulating pump is operated at a normal cleaning rotational speed for normal cleaning of the rinsing stock and a second rinsing program in which the circulating pump is operated at an intensive cleaning rotational speed higher than the normal cleaning rotational speed and lying in the upper rotational speed range for intensive cleaning of the rinsing stock, the first spray element is a rotatable spray arm arranged at a rotary coupling, and the rotary coupling has a leakage point or the first branch includes a section having a constriction that has a fixed cross sectional area that is less than a cross sectional area of a remainder of the first branch and the constriction is not between the circulating pump and the second spray element.