Dishwasher with separate sump for concentrated fluid supply
First Claim
Patent Images
1. A dishwashing machine, comprising:
- a tub having a bottom wall, a top wall, and a plurality of side walls defining a wash chamber,a number of dish racks movably positioned in the wash chamber,a first sprayer located adjacent a first portion of the dish racks,a second sprayer spaced from the first sprayer and located adjacent a second portion of the dish racks,a first sump formed in the bottom wall of the tub, the first sump supplying first wash fluid to the first sprayer,a second sump formed in the bottom wall of the tub and spaced from the first sump, the second sump supplying second wash fluid to the second sprayer,a dispenser storing a wash chemistry, anda computing unit programmed to control dispensing of the wash chemistry by the dispenser so that the second wash fluid supplied by the second sump during at least a portion of a washing cycle intentionally has a higher wash chemistry concentration than the first wash fluid supplied by the first sump during the same portion of the same washing cycle.
1 Assignment
0 Petitions
Accused Products
Abstract
A dishwasher includes a main sump that holds the main wash fluid supply, and a separate sump formed in the bottom wall of the tub away from the main sump. The separate sump holds a concentrated wash fluid supply. The separate sump supplies wash fluid for washing periods in which a highly concentrated chemistry mixture is desired.
38 Citations
20 Claims
-
1. A dishwashing machine, comprising:
-
a tub having a bottom wall, a top wall, and a plurality of side walls defining a wash chamber, a number of dish racks movably positioned in the wash chamber, a first sprayer located adjacent a first portion of the dish racks, a second sprayer spaced from the first sprayer and located adjacent a second portion of the dish racks, a first sump formed in the bottom wall of the tub, the first sump supplying first wash fluid to the first sprayer, a second sump formed in the bottom wall of the tub and spaced from the first sump, the second sump supplying second wash fluid to the second sprayer, a dispenser storing a wash chemistry, and a computing unit programmed to control dispensing of the wash chemistry by the dispenser so that the second wash fluid supplied by the second sump during at least a portion of a washing cycle intentionally has a higher wash chemistry concentration than the first wash fluid supplied by the first sump during the same portion of the same washing cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A dishwashing machine, comprising:
-
a tub having a bottom wall, a top wall, a back wall and a plurality of side walls defining a wash chamber, a single set of vertically spaced dish racks movably positioned in the wash chamber, a door pivotally mounted relative to the tub to selectively expose the dish racks for loading and unloading purposes, a first sprayer located adjacent a first portion of the dish racks, said first sprayer constituting a rotating spray arm located below the dish racks, a second sprayer spaced higher than the first sprayer, located adjacent a second portion of the dish racks and positioned above at least part of one of the dish racks, a first sump formed in the bottom wall of the tub directly beneath the single set of vertically spaced dish racks, the first sump being configured to supply first wash fluid to the first sprayer, a second sump formed in the bottom wall of the tub directly beneath the single set of vertically spaced dish racks and spaced from the first sump, the second sump configured to supply second wash fluid to the second sprayer, a first dispenser for providing a first wash chemistry to the first sump, a second dispenser for providing a second wash chemistry to the second sump, and a computing unit configured to control controlling the first and second dispensers so that in use, the second wash fluid supplied by the second sump has a higher wash chemistry concentration than the first wash fluid supplied by the first sump. - View Dependent Claims (19, 20)
-
Specification