Dishwasher in the form of a commercial utensil washer or dishwasher which is designed as a batch dishwasher

A method for operating a commercial dishwasher having a treatment chamber which is divided into a first treatment zone and a second treatment zone, wherein the method comprises the following method steps:

• wash liquid is sprayed at the same time in the first treatment zone and in the second treatment zone until the wash cycle in the first treatment zone is complete;
• after the wash cycle in the first treatment zone is complete, the wash cycle of the second treatment zone is interrupted and final rinse liquid is sprayed in the first treatment zone;
• and
• spraying of wash liquid in the second treatment zone is resumed only when a further wash cycle is started in the first treatment zone.

A dishwasher, comprising:

• a treatment chamber with a wash system which is configured as a recirculation system, wherein the treatment chamber includes a first treatment zone and a second treatment zone, wherein the first treatment zone is arranged above the second treatment zone,
• wherein the wash system includes a single wash tank below the second treatment zone, first wash nozzles oriented to spray into the first treatment zone, second wash nozzles oriented to spray into the second treatment zone and at least one wash pump for delivering wash liquid from the single wash tank to the first wash nozzles and the second wash nozzles,
• wherein wash liquid sprayed into the first treatment zone falls into the single wash tank for recirculation and wash liquid sprayed into the second treatment zone falls into the single wash tank for recirculation;
• a first door for providing access to the first treatment zone, wherein the first door is movable (i) vertically upward to move from a closed position to an open position relative to the first treatment zone and (ii) vertically downward to move from the open position to the closed position relative to the first treatment zone;
• a second door for providing access to the second treatment zone, wherein the second door is movable (i) pivotally downward to move from a closed position to an open position relative to the second treatment zone and (ii) pivotally upward to move from the open position to the closed position relative to the second treatment zone;
• and
• a final rinse system including first rinse nozzles oriented to spray into the first treatment zone, second rinse nozzles oriented to spray into the second treatment zone and at least one final rinse pump for delivering final rinse liquid to the first rinse nozzles and the second rinse nozzles.