Method for operating a dishwasher, and dishwasher

A batch dishwasher comprising:

• a treatment chamber, into which washware can be manually inserted and from which washware can be manually removed;
• a tank, into which liquid can flow off from the treatment chamber due to the force of gravity;
• a wash system having a wash pump and a wash line system for conveying wash liquid out of the tank during a wash phase and for spraying the wash liquid through wash nozzles in the treatment chamber;
• a fresh-water final-rinse system having at least one final-rinse pump and at least one final-rinse line system for conveying final-rinse liquid out of a fresh-water supply device during a fresh-water final-rinse phase and for spraying the final-rinse liquid through final-rinse nozzles in the treatment chamber;
• a drying device for continuously drawing moisture, or drawing moisture as required, from drying air which circulates in the treatment chamber, wherein the drying device has at least one sorption unit, which contains a reversibly dehydratable dry material, and also at least one fan for forming an air circuit as required in such a way that air is conducted through the sorption unit and then supplied to the treatment chamber;
• and
• a control device for carrying out the the following steps:
• (i) performing an adsorption phase in which air is conducted out of the treatment chamber through the sorption unit so that the dry material absorbs moisture from the air and the air is then returned to the chamber;
• and
• (ii) performing a desorption phase in which the dry material of the sorption unit is heated such that moisture is desorbed from the dry material and returned to the treatment chamber;
• wherein the control device is configured to control the sorption unit such that the desorption phase takes place within a time period of from 20 to 150 seconds in total and, for forced ventilation of the sorption unit, the fan is actuated in such a way that a volumetric flow rate of air which is forced through the dry material during the desorption phase is in a range of between 0.05 and 200 m3/h.

A method for operating a dishwasher, which dishwasher has a treatment chamber for accommodating washware which is to be cleaned, wherein the method comprises the following method steps:

• i) during an adsorption phase, air is conducted out of the treatment chamber through a sorption unit, which contains a reversibly dehydratable dry material, in such a way that the dry material absorbs moisture from the air stream, wherein the air is then returned to the treatment chamber;
• and
• ii) during a desorption phase, the dry material of the sorption unit is heated in such a way that moisture is desorbed from the dry material as steam,
• wherein, during the desorption phase, the sorption unit is subjected to forced ventilation to such an extent that recondensation of desorbed steam in the sorption unit itself is effectively prevented;
• wherein operation of a fan during the desorption face, for the purpose of forced ventilation, is subdivided with respect to time into an initial first time period and a subsequent second time period, and wherein the fan is actuated in such a way that a quantity of air which is forced through the dry material during the first time period per unit time is lower than a quantity of air which is forced through the dry material during the subsequent second time period per unit time.