EP1651093B1 - Method for operating a dishwasher with at least one partial programme step of drying - Google Patents

Method for operating a dishwasher with at least one partial programme step of drying Download PDF

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Publication number
EP1651093B1
EP1651093B1 EP04763100.7A EP04763100A EP1651093B1 EP 1651093 B1 EP1651093 B1 EP 1651093B1 EP 04763100 A EP04763100 A EP 04763100A EP 1651093 B1 EP1651093 B1 EP 1651093B1
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EP
European Patent Office
Prior art keywords
air
heated
program step
drying
sorption column
Prior art date
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EP04763100.7A
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German (de)
French (fr)
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EP1651093A1 (en
Inventor
Helmut Jerg
Kai Paintner
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority claimed from DE10353775A external-priority patent/DE10353775A1/en
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to EP16169510.1A priority Critical patent/EP3085292A1/en
Publication of EP1651093A1 publication Critical patent/EP1651093A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0042—Desorption phases of reversibly dehydrogenated drying material, e.g. zeolite in a sorption drying system
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0047—Energy or water consumption, e.g. by saving energy or water
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/10—Air circulation, e.g. air intake or venting arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/34—Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit

Definitions

  • the invention relates to a method for operating a dishwasher with at least one partial program step "drying".
  • drying for example, items to be washed in a dishwasher
  • different methods are known.
  • the items to be washed can be dried by self-heat drying if the rinsing liquid is heated in a rinse-out subprogram step and the hot, rinsed items are automatically dried by the self-heat of the item to be washed during the drying process.
  • the rinsing liquid is heated in the subprogram step "rinse", for example, in a heat exchanger to a certain temperature and applied to the items to be washed via spraying.
  • rinsing usually from 65 ° C to 75 ° C is achieved that a sufficiently large amount of heat is transferred to the items to be washed, so that the water adhering to the items by the heat stored in the items to be washed evaporated.
  • a separate heat source e.g. a hot air blower, used to heat the humid air mixture during the drying process, so that the air in the rinse tank can absorb a larger amount of water.
  • a disadvantage of the heating systems described above according to the prior art described above is that the heating of the rinsing liquid is associated with a high energy requirement and the required heat energy for each heating phase must be recreated by means of the electrical heating elements.
  • the known heating systems have the disadvantage that the heating of the rinsing liquid in the partial program step “rinse" and the operations in the sub-program step “drying" are themselves associated with a high energy demand and the required heat energy is lost after the drying process.
  • the laundry treatment and flushing device of DE 36 26 887 A1 has an air guidance system with air guidance control means, in which a container filled with adsorptive desiccant container is alternately connected to a process air to be dehumidified and a regeneration air flow.
  • a regeneration phase relatively dry ambient air is conducted from outside via an air guide channel by means of a blower into the container filled with desiccant.
  • heat is supplied to the desiccant for regeneration by a heater in the air duct over which the ambient air is sucked by means of the blower.
  • After flowing through the adsorptive drying agent from this moisture absorbing and thus moist regeneration air is discharged through an exhaust duct to the outside.
  • a hollow cylinder is arranged as a drying container, which is filled with a moisture adsorbing desiccant and is in thermal contact with the water heater.
  • the input-side connection of the drying container is connected via an air duct with a cover-side outlet of the washing.
  • a blower is inserted.
  • About its output-side connection of the drying container is connected to a mouth opening in the purge outlet.
  • the air duct is provided with a closure that interrupts the air circulation during rinsing.
  • the highly moisture-containing air is pressed during a drying process from the washing container by means of the now switched on fan in the drying vessel.
  • the desiccant stored in the drying vessel absorbs the moisture from the air flowing through the drying vessel, and the thus dried air is blown into the purge vessel via the outlet side port of the drying vessel and the exhaust port.
  • the object of the present invention is to provide a method with which it is possible to operate a dishwasher as economically as possible, to dry it efficiently in its material to be dried and to keep the associated energy expenditure as low as possible.
  • the air is heated by heat of condensation during the passage of the sorption column and, if necessary, additionally heated by a heater.
  • air is passed from the treatment space through the sorption column and into the treatment space and heated during the passage.
  • the reversibly dehydratable material for desorption is heated to very high temperatures, for which heat energy is necessary.
  • the stored occurs Liquid as hot steam.
  • the water vapor is preferably passed with an air flow in the treatment room of the device and thus the air in the treatment room is heated and thereby the treatment liquid, for. B. the rinsing liquor and / or the good to be cleaned, z. B. heated the dishes with.
  • the air passed through cools down, as a result of which the water vapor contained in it completely or partially condenses. This is preferably done as a closed air circuit.
  • the introduction of the hot water vapor and the heated air into the treatment chamber during a partial program step with the treatment liquid to be heated or possibly already heated is largely sufficient to sufficiently heat the treatment liquid.
  • the passage of the air is carried out during a program step with the treatment liquid to be heated.
  • air is passed through the sorbent column and heated and the air is passed through a heat storage for cooling and subsequently air for heating through the heat storage and into the treatment chamber, to temporarily store the heat used for desorption in the heat storage ,
  • the sorption column or the air in a line to the sorption column is heated by a heater for desorption.
  • the treatment liquid and / or the material to be treated is heated by the heated air passed through and the desorbed moisture is at least partially released from the sorption column in the treatment space.
  • the inventive method for operating a device with at least one partial program step "drying” is performed in the illustrated embodiment in a dishwasher.
  • a dishwasher is known to have a rinsing process whose program sequence generally consists of at least one partial program step "pre-rinsing", one sub-program step “cleaning”, at least one sub-program step “intermediate rinsing", one sub-program step "rinsing” and one sub-program step “drying”.
  • air is passed from a treatment space through a sorption column and then preferably back into the treatment space.
  • the treatment space of the dishwasher for this purpose-the washing container- is equipped with an outlet in the upper region of the washing container. From this outlet, an air line leads to a fan and from the fan to the sorption column.
  • This sorption column contains reversibly dehydratable material which extracts moisture from the air during the passage and is known to be heated and thus also heats the air which has passed through it. In addition to this warming effect, it is also possible to heat the air additionally with a heater.
  • a further air line leads from the sorption column to an inlet located in the lower region of the washing container.
  • the heated air introduced into the purge bin is completely dry and has high moisture absorption capacity. It rises in the washing up and takes up the residual moisture on the material to be treated - the items to be washed. It is now, as already described above, fed back to the sorption column.
  • reversibly dehydratable material preferably does not require heating of the material to be treated, e.g. for dishwashers in the partial program step "rinsing". This means a significant energy saving.
  • heating the air By heating the air, its moisture absorption capacity is increased with each passing through the sorption column, which leads to the improvement of the drying result and to the shortening of the drying time.
  • an exchange of polluted air from the environment is completely excluded, whereby a scrubanschmutzung the treated material is prevented.
  • the reversibly dehydratable material is known to have a limited fluid holding capacity. To make it reusable, a desorption is necessary in which the reversibly dehydratable material is heated to a high temperature and the liquid then emerges as vapor.
  • the desorption of the reversibly dehydratable material is preferably carried out during a partial program step with treatment liquid to be heated.
  • the desorption of the reversibly dehydratable material is carried out during a partial program step "cleaning" and / or "pre-rinsing", in which the items to be washed are treated with heated treatment liquid - rinsing liquor - in a dishwasher by means of spraying devices.
  • a z. B. operated in the sorption column heating, which heats the reversibly dehydratable material to a high temperature.
  • air is sucked out of the washing container during a partial program step "cleaning" by means of the above-mentioned fan and forced through the sorption column.
  • the hot steam emerging from the sorption column and the now heated air enter the rinsing tank through the inlet already mentioned above and there they encounter the circulated rinsing liquor and / or crockery which is thereby heated.
  • the introduction of the hot water vapor and the heated air into the treatment chamber during a partial program step with the treatment liquid to be heated or possibly already heated is largely sufficient to adequately heat the treatment liquid and / or the dishes. This can largely account for a further heating and the energy used for desorption can be almost completely used for heating the treatment liquid (rinsing liquor) and / or the dishes except for the low energy required to overcome the binding forces between water and reversibly dehydratable material , Furthermore, an efficient cleaning of the material to be treated is guaranteed in addition to the energy savings.
  • the desorption of the reversibly dehydratable material is not carried out during a partial program step with treatment liquid to be heated, but at any other time by the energy released during the desorption energy in a heat storage, eg. B. with a liquefied at high heat of fusion medium or a latent storage, is cached, and will give as needed to be heated to a treatment liquid and / or the dishes.
  • a heat storage eg. B. with a liquefied at high heat of fusion medium or a latent storage
  • the sorption column is - as already described - preferably during a partial program step with the treatment liquid to be heated with a heater a very high temperature, z. B. 300 ° C, heated, so that the sorbent gives off the absorbed water.
  • the Sorptonskolonne heated to high temperatures eg. B. 150 ° -200 ° C, by the heat of condensation of water vapor or moisture.
  • the introduced into the washing dry air or the air with steam can reach temperatures that cause damage to the dishes, eg. B. plastic parts, can lead.
  • the air inlet temperature in the washing compartment must therefore be lowered so far in a further embodiment with a cooling that no damage occurs.
  • this residual water is passed on or around the inlet opening and thereby cooled the air flow.
  • the dry and warm air absorbs part of the water, which leads due to the evaporative cooling to cool the air flow.
  • a heat exchange takes place through the spray water and the air flow with water vapor at the inlet opening.
  • the inlet opening is applied to the effect that the air flow does not hit directly on the dishes and a sufficient cooling of the air flow through the spray water takes place.
  • the heating for heating the sorption column for desorption - hereinafter called Heilheizug - has a dishwasher according to the invention in an embodiment not shown via a water heater for the rinsing liquor, if not omitted on the basis of the present invention thereto.
  • a heating is necessary, this can be achieved either with the known from the prior art water heater or with the air heater with the fan on.
  • the advantage of heating with the air heating is that in the subsequent part program step "drying" the heat energy stored in the sorption column can be used for drying.
  • the fan are turned on - with switched off air heating.
  • a method is provided with which it is possible to operate devices of the type mentioned as economically as possible, to efficiently dry the material to be dried and to keep the associated energy consumption as low as possible.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Drying Of Solid Materials (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Geschirrspülmaschine mit wenigstens einem Teilprogrammschritt "Trocknen".
Zur Trocknung z.B. von Spülgut in einer Geschirrspülmaschine sind unterschiedliche Verfahren bekannt. Beispielsweise kann das Spülgut durch Eigenwärmetrocknung getrocknet werden, wenn die Spülflüssigkeit in einem Teilprogrammschritt "Klarspülen" erhitzt wird und somit das heiß klargespülte Spülgut durch die so aufgebaute Eigenwärme des Spülguts während des Trocknungsvorgangs von selbst trocknet. Um diese Eigenwärmetrocknung zu erreichen, wird die Spülflüssigkeit in dem Teilprogrammschritt "Klarspülen", z.B. in einem Wärmetauscher auf eine bestimmte Temperatur erwärmt und über Sprüheinrichtungen auf das Spülgut aufgebracht. Durch die relativ hohe Temperatur der Spülflüssigkeit in dem Teilprogrammschritt "Klarspülen" von üblicherweise von 65°C bis 75°C wird erreicht, dass eine hinreichend große Wärmemenge auf das Spülgut übertragen wird, so dass das am Spülgut anhaftende Wasser durch die im Spülgut gespeicherte Wärme verdampft.The invention relates to a method for operating a dishwasher with at least one partial program step "drying".
For drying, for example, items to be washed in a dishwasher, different methods are known. For example, the items to be washed can be dried by self-heat drying if the rinsing liquid is heated in a rinse-out subprogram step and the hot, rinsed items are automatically dried by the self-heat of the item to be washed during the drying process. In order to achieve this self-heating, the rinsing liquid is heated in the subprogram step "rinse", for example, in a heat exchanger to a certain temperature and applied to the items to be washed via spraying. Due to the relatively high temperature of the rinsing liquid in the partial program step "rinsing" usually from 65 ° C to 75 ° C is achieved that a sufficiently large amount of heat is transferred to the items to be washed, so that the water adhering to the items by the heat stored in the items to be washed evaporated.

Bei weiteren bekannten Verfahren zur Trocknung des Spülguts in Geschirrspülmaschinen wird eine separate Heizquelle, z.B. ein Heißluftgebläse, dazu verwendet, das feuchte Luftgemisch beim Trocknungsvorgang zu erwärmen, damit die Luft im Spülbehälter eine größere Menge an Wasser aufnehmen kann.In other known methods for drying the dishes in dishwashers, a separate heat source, e.g. a hot air blower, used to heat the humid air mixture during the drying process, so that the air in the rinse tank can absorb a larger amount of water.

Es sind Geschirrspülmaschinen bekannt, bei denen die Feuchtluft nach außen abgelassen wird. Dies ist nachteilig, da die umgebenden Küchenmöbel geschädigt werden.There are known dishwashers in which the moist air is discharged to the outside. This is disadvantageous because the surrounding kitchen furniture is damaged.

Daher sind weitere Verfahren bekannt, bei denen vor dem Ausleiten die Feuchtluft über Kondensationsflächen geleitet wird, an denen die Feuchtigkeit kondensiert. Dieses Kondenswasser wird entweder in den Spülbehälter oder in spezielle Auffangbehälter geleitet.Therefore, other methods are known in which, before discharging the moist air is passed through condensation surfaces, where the moisture condenses. This Condensation is directed either into the rinsing container or into special collection containers.

Aus der DE 20 16 831 A1 ist ein Verfahren der eingangs genannten Art für Geschirrspülmaschinen bekannt, bei dem die Luft aus dem Spülbehälter über eine verschließbare Öffnung in der Wand des Spülbehälters auf reversibel dehydrierbares Material geleitet wird und von dort über eine Öffnung nach außen. Die Desorption des reversibel dehydrierbaren Materials findet während der Stillstandsphase des Gerätes statt, wobei der dabei entstehende Wasserdampf über die Öffnung doch wieder nach außen geleitet wird. Wie oben schon erläutert, ist dies nachteilig, da die umgebenden Küchenmöbel geschädigt werden.From the DE 20 16 831 A1 a method of the type mentioned for dishwashers is known in which the air is passed from the washing container via a closable opening in the wall of the washing container on reversibly dehydratable material and from there via an opening to the outside. The desorption of the reversibly dehydratable material takes place during the stoppage phase of the device, wherein the resulting water vapor is passed through the opening but again to the outside. As explained above, this is disadvantageous because the surrounding kitchen furniture is damaged.

Ein Nachteil bei den oben beschriebenen Heizungssystemen nach dem weiter oben beschriebenen Stand der Technik besteht darin, dass die Erwärmung der Spülflüssigkeit mit einem hohen Energiebedarf verbunden ist und die benötigte Wärmeenergie für jede Erwärmungsphase mittels der elektrischen Heizelemente neu erzeugt werden muss. Ebenso haben die bekannten Heizungssysteme den Nachteil, dass die Erwärmung der Spülflüssigkeit im Teilprogrammschritt "Klarspülen" sowie die Vorgänge im Teilprogrammschritt "Trocknen" selbst mit einem hohen Energiebedarf verbunden sind und die benötigte Wärmeenergie nach dem Trocknungsvorgang verloren geht.A disadvantage of the heating systems described above according to the prior art described above is that the heating of the rinsing liquid is associated with a high energy requirement and the required heat energy for each heating phase must be recreated by means of the electrical heating elements. Likewise, the known heating systems have the disadvantage that the heating of the rinsing liquid in the partial program step "rinse" and the operations in the sub-program step "drying" are themselves associated with a high energy demand and the required heat energy is lost after the drying process.

Das Wäschebehandlungs- und Spülgerät der DE 36 26 887 A1 weist ein Luftführungssystem mit Luftführungs-Steuermitteln auf, bei dem ein mit adsorptiven Trocknungsmittel gefüllter Behälter wechselweise an einen zu entfeuchtenden Prozessluftstrom und einen Regenerationsluftstrom anschließbar ist. In einer Regenerierungsphase wird von außen relativ trockene Umgebungsluft über einen Luftführungskanal mittels eines Gebläses in den mit Trocknungsmittel gefüllten Behälter geleitet. Dabei wird durch eine Heizvorrichtung im Luftführungskanal, über den die Umgebungsluft mittels des Gebläses angesaugt wird, dem Trocknungsmittel Wärme zur Regeneration zugeführt. Nach Durchströmen des adsorptiven Trocknungsmittels wird die aus diesem Feuchtigkeit aufnehmende und damit feuchte Regenerationsluft über einen Abluftkanal nach außen abgegeben.The laundry treatment and flushing device of DE 36 26 887 A1 has an air guidance system with air guidance control means, in which a container filled with adsorptive desiccant container is alternately connected to a process air to be dehumidified and a regeneration air flow. In a regeneration phase, relatively dry ambient air is conducted from outside via an air guide channel by means of a blower into the container filled with desiccant. In this case, heat is supplied to the desiccant for regeneration by a heater in the air duct over which the ambient air is sucked by means of the blower. After flowing through the adsorptive drying agent from this moisture absorbing and thus moist regeneration air is discharged through an exhaust duct to the outside.

Bei der Geschirrspülmaschine der DE 38 30 664 A1 wird für die Durchführung eines Spülvorganges von einer Pumpe aufzuheizende Spülflotte über einen Durchlauferhitzer in ein Verteiler- und Sprühsystem gedrückt und im Spülbehälter versprüht. Um den Durchlauferhitzer ist ein Hohlzylinder als Trockenbehälter angeordnet, der mit einem Feuchtigkeit adsorbierenden Trockenmittel gefüllt ist und mit dem Durchlauferhitzer in Wärmekontakt steht. Der eingangsseitige Anschluss des Trockenbehälters ist über eine Luftführung mit einem deckseitigen Auslass des Spülbehälters verbunden. In diese Luftführung ist ein Gebläse eingefügt. Über seinen ausgangsseitigen Anschluss ist der Trockenbehälter mit einer im Spülbehälter mündenden Ausblasöffnung verbunden. Die Luftführung ist mit einem Verschluss versehen, der während des Spülens die Luftzirkulation unterbricht. Nach Abschluß des Spülflotte versprühenden Spülvorganges wird die stark feuchtigkeitshaltige Luft während eines Trockenvorganges aus dem Spülbehälter mittels des nun eingeschalteten Gebläses in den Trockenbehälter gedrückt. Das im Trockenbehälter gelagerte Trockenmittel nimmt die Feuchtigkeit aus der durch den Trockenbehälter hindurchströmenden Luft auf und die derart getrocknete Luft wird über den ausgangsseitigen Anschluss des Trockenbehälters und die Ausblasöffnung in den Spülbehälter geblasen.In the dishwasher of DE 38 30 664 A1 is pressed to carry out a rinsing process by a pump to be heated rinsing water via a water heater in a distribution and spray system and sprayed in the washing. To the water heater, a hollow cylinder is arranged as a drying container, which is filled with a moisture adsorbing desiccant and is in thermal contact with the water heater. The input-side connection of the drying container is connected via an air duct with a cover-side outlet of the washing. In this air duct, a blower is inserted. About its output-side connection of the drying container is connected to a mouth opening in the purge outlet. The air duct is provided with a closure that interrupts the air circulation during rinsing. After completion of the rinsing spray spraying the highly moisture-containing air is pressed during a drying process from the washing container by means of the now switched on fan in the drying vessel. The desiccant stored in the drying vessel absorbs the moisture from the air flowing through the drying vessel, and the thus dried air is blown into the purge vessel via the outlet side port of the drying vessel and the exhaust port.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren bereitzustellen, mit dem es möglich ist, eine Geschirrspülmaschine möglichst wirtschaftlich zu betreiben, in ihr zu trocknendes Gut effizient zu trocknen sowie den damit verbundenen Energieaufwand so gering wie möglich zu halten.The object of the present invention is to provide a method with which it is possible to operate a dishwasher as economically as possible, to dry it efficiently in its material to be dried and to keep the associated energy expenditure as low as possible.

Diese Aufgabe wird durch das erfindungsgemäße Verfahren mit den Merkmalen gemäß Anspruch 1 gelöst. Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind in den Unteransprüchen gekennzeichnet.This object is achieved by the method according to the invention with the features of claim 1. Advantageous developments of the present invention are characterized in the subclaims.

Bei dem erfindungsgemäßen Verfahren zum Betreiben einer Geschirrspülmaschine mit wenigstens einem Teilprogrammschritt "Trocknen" wird in dem wenigstens einem Teilprogrammschritt "Trocknen" Luft aus einem Behandlungsraum durch eine Sorptionskolonne und in den Behandlungsraum geleitet, wobei die Sorptionskolonne reversibel dehydrierbares Material enthält und der Luft während des Durchleitens Feuchtigkeit entzieht.In the method according to the invention for operating a dishwasher with at least one partial program step "drying", in the at least one partial program step "drying", air is passed from a treatment space through a sorption column and into the treatment space, wherein the sorption column contains reversibly dehydratable material and the air during the passage Moisture deprives.

In einer vorteilhaften Ausgestaltung dieses Verfahrens wird die Luft während des Durchleitens von der Sorptionskolonne durch Kondensationswärme erwärmt und bei Bedarf zusätzlich von einer Heizung erwärmt.In an advantageous embodiment of this method, the air is heated by heat of condensation during the passage of the sorption column and, if necessary, additionally heated by a heater.

Durch den Einsatz von reversibel dehydrierbarem Material mit hygroskopischer Eigenschaft, z. B. Zeolith, ist eine Erwärmung des zu behandelnden Gutes dem Teilprogrammschritt "Trocknen" vorhergehenden Teilprogrammschritt normalerweise nicht notwendig, z.B. bei Geschirrspülmaschinen im Teilprogrammschritt "Klarspülen". Dies ermöglicht eine beträchtliche Energieeinsparung. Jedoch ist eine Erwärmung auf niedrige Temperaturen, z. B. bis 30° C, beim "Klarspülen" weiterhin sinnvoll. Durch die Erwärmung der Luft mittels der Sorptionskolonne, in der die Kondensationsmenge des Wärmedampfes frei wird, wird deren Feuchtigkeitsaufnahmekapazität bei jedem Durchleiten durch die Sorptionskolonne erhöht, was zur Verbesserung des Trocknungsergebnisses und zur Verkürzung der Trocknungszeit führt. Eine zusätzliche Erwärmung der Luft mit einer ergänzenden Heizung im Teilprogrammschritt "Trocknen" über die Erwärmung mit der Sorptionskolonne hinaus und damit z. B. auch des Geschirrs bei Geschirrspülmaschinen ist normalerweise nicht erforderlich, weil die in der Sorptionskolonne frei werdende Wärmeenergie ausreichend ist, die Luft auf hohe Temperaturen, z. B. 70°C, aufzuwärmen. Die Sorptionskolonne erwärmt sich duch die Kondensationswärme auf hohe Temperaturen, z. B. 150°C.By the use of reversibly dehydratable material with hygroscopic property, eg. For example, zeolite, heating of the material to be treated is not normally necessary for the partial program step preceding the partial program step "drying", e.g. for dishwashers in the partial program step "rinsing". This allows a considerable energy saving. However, heating to low temperatures, e.g. B. to 30 ° C, the "rinse" continues to make sense. By heating the air by means of the sorption column, in which the condensation amount of the heat vapor is released, the moisture absorption capacity is increased with each passing through the sorption column, which leads to the improvement of the drying result and to shorten the drying time. An additional heating of the air with a supplementary heating in the sub-program step "drying" on the heating with the sorbent addition and thus z. As well as the dishes in dishwashers is usually not required because the released in the sorption heat energy is sufficient, the air at high temperatures, eg. B. 70 ° C, warm up. The sorption column is heated by the condensation heat to high temperatures, eg. B. 150 ° C.

Bei dem vorzugsweise geschlossenen Luftsystem ist ein Austausch von verschmutzter Luft aus der Umgebung vollständig ausgeschlossen, womit eine Rückanschmutzung des behandelten Gutes verhindert wird. Mit der vorliegenden Erfindung ist ein Verfahren bereitgestellt, mit dem es möglich ist, Geräte der eingangs genannten Art möglichst wirtschaftlich zu betreiben, das zu trocknende Gut effizient zu trocknen sowie den damit verbundenen Energieaufwand so gering wie möglich zu halten.In the preferably closed air system, an exchange of polluted air from the environment is completely excluded, whereby a Rückanschmutzung the treated material is prevented. With the present invention, a method is provided with which it is possible to operate devices of the type mentioned as economically as possible, to efficiently dry the material to be dried and to keep the associated energy consumption as low as possible.

Nach einem Merkmal der Erfindung wird zur Desorption des reversibel dehydrierbaren Materials Luft aus dem Behandlungsraum durch die Sorptionskolonne und in den Behandlungsraum geleitet und während des Durchleitens erwärmt.According to one feature of the invention, for the desorption of the reversibly dehydratable material, air is passed from the treatment space through the sorption column and into the treatment space and heated during the passage.

Wie bekannt, wird das reversibel dehydrierbare Material zur Desorption auf sehr hohe Temperaturen erhitzt, wozu Wärmeenergie notwendig ist. Dabei tritt die gespeicherte Flüssigkeit als heißer Wasserdampf aus. Der Wasserdampf wird vorzugsweise mit einem Luftstrom in den Behandlungsraum des Geräts geleitet und die Luft im Behandlungsraum somit erwärmt und dadurch die Behandlungsflüssigkeit, z. B. die Spülflotte und/oder das zu reinigende Gut, z. B. das Geschirr mit erwärmt. Die durchgeleitete Luft kühlt ab, wodurch der darin enthaltene Wasserdampf ganz oder teilweise kondensiert. Vorzugsweise erfolgt dies als geschlossener Luftkreislauf. Die Einleitung des heißen Wasserdampfs und der erwärmten Luft in den Behandlungsraum während eines Teilprogrammschrittes mit zu erwärmender oder unter Umständen bereits erwärmter Behandlungsflüssigkeit reicht weitgehendst aus, um die Behandlungsflüssigkeit ausreichend zu erwärmen. Damit kann eine weitere Heizung weitgehendst entfallen und die zur Desorption eingesetzte Wärmeenergie kann bis auf die geringe Energie, die zur Überwindung der Bindungskräfte zwischen Wasser und reversibel dehydrierbarem Material benötigt wird, nahezu vollständig zur Erwärmung der Behandlungsflüssigkeit z. B. der Spülflotte und/oder des zu reinigenden Gutes, z. B. des Geschirrs verwendet werden. Weiterhin ist neben der Energieeinsparung auch eine effiziente Reinigung des zu reinigenden, behandelnden Guts gewährleistet.As is known, the reversibly dehydratable material for desorption is heated to very high temperatures, for which heat energy is necessary. The stored occurs Liquid as hot steam. The water vapor is preferably passed with an air flow in the treatment room of the device and thus the air in the treatment room is heated and thereby the treatment liquid, for. B. the rinsing liquor and / or the good to be cleaned, z. B. heated the dishes with. The air passed through cools down, as a result of which the water vapor contained in it completely or partially condenses. This is preferably done as a closed air circuit. The introduction of the hot water vapor and the heated air into the treatment chamber during a partial program step with the treatment liquid to be heated or possibly already heated is largely sufficient to sufficiently heat the treatment liquid. This can largely account for a further heating and the heat energy used for desorption can almost completely for heating the treatment liquid z. To the low energy required to overcome the binding forces between water and reversibly dehydratable material. B. the rinsing liquor and / or the goods to be cleaned, for. B. of the dishes are used. Furthermore, in addition to the energy savings, an efficient cleaning of the treated Guts to be cleaned is guaranteed.

Die Durchleitung der Luft wird während eines Programmteilschrittes mit zu erwärmender Behandlungsflüssigkeit vorgenommen.The passage of the air is carried out during a program step with the treatment liquid to be heated.

In einer anderen Ausführungsform wird zur Desorption des reversiblen dehydrierbaren Materials Luft durch die Sorptionskolonne geleitet und erwärmt und die Luft durch einen Wärmespeicher zur Abkühlung geleitet und darauffolgend Luft zum Erwärmen durch den Wärmespeicher und in den Behandlungsraum geleitet, um die zur Desorption eingesetzte Wärme im Wärmespeicher zwischenzuspeichern.In another embodiment, for the desorption of the reversible dehydrogenatable material, air is passed through the sorbent column and heated and the air is passed through a heat storage for cooling and subsequently air for heating through the heat storage and into the treatment chamber, to temporarily store the heat used for desorption in the heat storage ,

Erfindungsgemäß wird zur Desorption die Sorptionskolonne oder die Luft in einer Leitung zur Sorptionskolonne von einer Heizung erwärmt.According to the invention, the sorption column or the air in a line to the sorption column is heated by a heater for desorption.

Nach einer anderen vorteilhaften Variante wird durch die erwärmte durchgeleitete Luft die Behandlungsflüssigkeit und/oder das zu behandelnde Gut erwärmt und die desorbierte Feuchtigkeit aus der Sorptionskolonne im Behandlungsraum wenigstens teilweise abgegeben.According to another advantageous variant, the treatment liquid and / or the material to be treated is heated by the heated air passed through and the desorbed moisture is at least partially released from the sorption column in the treatment space.

Des Weiteren kann in einem Teilprogrammschritt mit zu erwärmender Behandlungsflüssigkeit, z. B. "Klarspülen", Luft aus dem Behandlungsraum durch die Sorptionskolonne bei ausgeschalteter Heizung und in den Behandlungsraum geleitet werden, wobei sich durch die Kondensationswärme in der Sorptionskolonne die Luft erwärmt.Furthermore, in a partial program step with the treatment liquid to be heated, for. B. "rinse", air from the treatment room are passed through the sorption column with the heating off and in the treatment room, which heats the air by the heat of condensation in the sorption.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels eines Verfahrens bei einer Geschirrspülmaschine erläutert.The invention will be explained below with reference to an embodiment of a method in a dishwasher.

Das erfindungsgemäße Verfahren zum Betreiben eines Gerätes mit wenigstens einem Teilprogrammschritt "Trocknen" wird bei dem erläuterten Ausführungsbeispiel in einer Geschirrspülmaschine ausgeführt. Eine Geschirrspülmaschine weist bekanntlich ein Spülverfahren auf, dessen Programmablauf im Allgemeinen aus wenigstens einem Teilprogrammschritt "Vorspülen", einem Teilprogrammschritt "Reinigen", wenigstens einem Teilprogrammschritt "Zwischenspülen", einem Teilprogrammschritt "Klarspülen" und einem Teilprogrammschritt "Trocknen" besteht. Erfindungsgemäß wird bei dem erläuterten Ausführungsbeispiel in dem wenigstens einen Teilprogrammschritt "Trocknen" Luft aus einem Behandlungsraum durch eine Sorptionskolonne und dann vorzugsweise zurück in den Behandlungsraum geleitet.The inventive method for operating a device with at least one partial program step "drying" is performed in the illustrated embodiment in a dishwasher. A dishwasher is known to have a rinsing process whose program sequence generally consists of at least one partial program step "pre-rinsing", one sub-program step "cleaning", at least one sub-program step "intermediate rinsing", one sub-program step "rinsing" and one sub-program step "drying". According to the invention, in the illustrated embodiment, in the at least one partial program step "drying", air is passed from a treatment space through a sorption column and then preferably back into the treatment space.

Im Ausführungsbeispiel ist dafür der Behandlungsraum der Geschirrspülmaschine - der Spülbehälter - mit einem Auslass im oberen Bereich des Spülbehälters ausgestattet. Von diesem Auslass führt eine Luftleitung zu einem Gebläse und von dem Gebläse zur Sorptionskolonne.In the exemplary embodiment, the treatment space of the dishwasher for this purpose-the washing container-is equipped with an outlet in the upper region of the washing container. From this outlet, an air line leads to a fan and from the fan to the sorption column.

Diese Sorptionskolonne enthält reversibel dehydrierbares Material, das der Luft während des Durchleitens Feuchtigkeit entzieht und sich dabei bekanntermaßen erwärmt und damit auch die durchgeleitete Luft erwärmt. Ergänzend zu diesem Erwärmungseffekt ist es auch möglich, die Luft zusätzlich mit einer Heizung zu erwärmen.This sorption column contains reversibly dehydratable material which extracts moisture from the air during the passage and is known to be heated and thus also heats the air which has passed through it. In addition to this warming effect, it is also possible to heat the air additionally with a heater.

Im Ausführungsbeispiel führt eine weitere Luftleitung von der Sorptionskolonne zu einem im unteren Bereich des Spülbehälters gelegenen Einlass.In the exemplary embodiment, a further air line leads from the sorption column to an inlet located in the lower region of the washing container.

Die in den Spülbehälter eingeleitete, erwärmte Luft ist vollständig trocken und weist ein hohes Aufnahmevermögen für Feuchtigkeit auf. Sie steigt im Spülbehälter nach oben und nimmt die Restfeuchtigkeit an dem zu behandelnden Gut - dem Spülgut - auf. Sie wird nun, wie oben schon beschrieben wieder der Sorptionskolonne zugeleitet.The heated air introduced into the purge bin is completely dry and has high moisture absorption capacity. It rises in the washing up and takes up the residual moisture on the material to be treated - the items to be washed. It is now, as already described above, fed back to the sorption column.

Durch den Einsatz von reversibel dehydrierbarem Material ist vorzugsweise eine Erwärmung des zu behandelnden Gutes nicht notwendig, z.B. bei Geschirrspülmaschinen im Teilprogrammschritt "Klarspülen". Dies bedeutet eine wesentliche Energieeinsparung. Durch die Erwärmung der Luft wird deren Feuchtigkeitsaufnahmekapazität bei jedem Durchleiten durch die Sorptionskolonne erhöht, was zur Verbesserung des Trocknungsergebnisses und zur Verkürzung der Trocknungszeit führt. Bei dem vorzugsweise geschlossenen Luftsystem ist ein Austausch von verschmutzter Luft aus der Umgebung vollständig ausgeschlossen, womit eine Rückanschmutzung des behandelten Gutes verhindert wird.The use of reversibly dehydratable material preferably does not require heating of the material to be treated, e.g. for dishwashers in the partial program step "rinsing". This means a significant energy saving. By heating the air, its moisture absorption capacity is increased with each passing through the sorption column, which leads to the improvement of the drying result and to the shortening of the drying time. In the preferably closed air system, an exchange of polluted air from the environment is completely excluded, whereby a Rückanschmutzung the treated material is prevented.

Das reversibel dehydrierbare Material hat bekanntermaßen eine begrenzte Flüssigkeitsaufnahmekapazität. Um es wieder verwendbar zu machen, ist eine Desorption notwendig, bei der das reversibel dehydrierbare Material auf eine hohe Temperatur erwärmt wird und die Flüssigkeit dann als Dampf austritt.The reversibly dehydratable material is known to have a limited fluid holding capacity. To make it reusable, a desorption is necessary in which the reversibly dehydratable material is heated to a high temperature and the liquid then emerges as vapor.

Erfindungsgemäß wird die Desorption des reversibel dehydrierbaren Materials vorzugsweise während eines Teilprogrammschrittes mit zu erwärmender Behandlungsflüssigkeit vorgenommen.According to the invention, the desorption of the reversibly dehydratable material is preferably carried out during a partial program step with treatment liquid to be heated.

Im Ausführungsbeispiel wird die Desorption des reversibel dehydrierbaren Materials während eines Teilprogrammschrittes "Reinigen" und/oder "Vorspülen" vorgenommen, bei dem in einer Geschirrspülmaschine das Spülgut mit erwärmter Behandlungsflüssigkeit - Spülflotte - mittels Sprüheinrichtungen beaufschlagt wird. Hierzu wird eine z. B. in der Sorptionskolonne angeordnete Heizung betrieben, die das reversibel dehydrierbare Material auf eine hohe Temperatur erwärmt.In the exemplary embodiment, the desorption of the reversibly dehydratable material is carried out during a partial program step "cleaning" and / or "pre-rinsing", in which the items to be washed are treated with heated treatment liquid - rinsing liquor - in a dishwasher by means of spraying devices. For this purpose, a z. B. operated in the sorption column heating, which heats the reversibly dehydratable material to a high temperature.

Erfindungsgemäß wird während der Desorption des reversibel dehydrierbaren Materials Luft aus einem Behandlungsraum z. B. mit einem Auslass durch eine Sorptionskolonne und dann zurück in den Behandlungsraum z. B. mit einem Einlass geleitet, wobei die Luft während des Durchleitens durch eine Heizung erwärmt wird.According to the invention during the desorption of the reversibly dehydratable material air from a treatment room z. B. with an outlet through a sorption column and then back to the treatment room z. B. with an inlet, wherein the air is heated during the passage through a heater.

Im Ausführungsbeispiel wird während eines Teilprogrammschrittes "Reinigen" mittels des oben erwähnten Gebläses Luft aus dem Spülbehälter angesaugt und durch die Sorptionskolonne gedrückt. Der aus der Sorptionskolonne austretende heiße Wasserdampf und die nun erwärmte Luft treten in den Spülbehälter durch den oben schon erwähnten Einlass ein und treffen dort auf die umgewälzte Spülflotte und/oder Geschirr, die dabei erwärmt wird.In the exemplary embodiment, air is sucked out of the washing container during a partial program step "cleaning" by means of the above-mentioned fan and forced through the sorption column. The hot steam emerging from the sorption column and the now heated air enter the rinsing tank through the inlet already mentioned above and there they encounter the circulated rinsing liquor and / or crockery which is thereby heated.

Die Einleitung des heißen Wasserdampfs und der erwärmten Luft in den Behandlungsraum während eines Teilprogrammschrittes mit zu erwärmender oder unter Umständen bereits erwärmter Behandlungsflüssigkeit reicht weitgehendst aus, um die Behandlungsflüssigkeit und/oder das Geschirr ausreichend zu erwärmen. Damit kann eine weitere Heizung weitgehendst entfallen und die zur Desorption eingesetzte Energie kann bis auf die geringe Energie, die zur Überwindung der Bindungskräfte zwischen Wasser und reversibel dehydrierbarem Material benötigt wird, nahezu vollständig zur Erwärmung der Behandlungsflüssigkeit (Spülflotte) und/oder des Geschirrs verwendet werden. Weiterhin ist neben der Energieeinsparung auch eine effiziente Reinigung des zu behandelnden Guts gewährleistet.The introduction of the hot water vapor and the heated air into the treatment chamber during a partial program step with the treatment liquid to be heated or possibly already heated is largely sufficient to adequately heat the treatment liquid and / or the dishes. This can largely account for a further heating and the energy used for desorption can be almost completely used for heating the treatment liquid (rinsing liquor) and / or the dishes except for the low energy required to overcome the binding forces between water and reversibly dehydratable material , Furthermore, an efficient cleaning of the material to be treated is guaranteed in addition to the energy savings.

In einer weiteren Variante wird die Desorption des reversibel dehydrierbaren Materials nicht während eines Teilprogrammschritts mit zu erwärmender Behandlungsflüssigkeit ausgeführt, sondern zu einem beliebigen anderen Zeitpunkt, indem die bei der Desorption frei werdende Energie in einen Wärmespeicher, z. B. mit einem bei großer Schmelzwärme sich verflüssigenden Medium bzw. einen Latentspeicher, zwischengespeichert wird, und bei Bedarf an eine zu erwärmende Behandlungsflüssigkeit und/oder das Geschirr abegeben wird. Dadurch kann, z. B. falls die zur Desorption eingesetzte Wärmeenergie größer ist als in einem Teilprogrammschritt benötigt, diese überschüssige Energie vorteilhaft in einem späteren Teilprogrammschritt mit zu erwärmender Behandlungsflüssigkeit verwendet werden.In a further variant, the desorption of the reversibly dehydratable material is not carried out during a partial program step with treatment liquid to be heated, but at any other time by the energy released during the desorption energy in a heat storage, eg. B. with a liquefied at high heat of fusion medium or a latent storage, is cached, and will give as needed to be heated to a treatment liquid and / or the dishes. This can, for. B. if the thermal energy used for desorption is greater than needed in a part program step, this excess energy can be used advantageously in a later part program step to be heated with treatment liquid.

Die Sorptionskolonne wird - wie bereits beschrieben - vorzugsweise während eines Teilprogrammschrittes mit zu erwärmender Behandlungsflüssigkeit mit einer Heizung auf eine sehr hohe Temperatur, z. B. 300°C, aufgeheizt, damit die Sorptionskolonne das aufgenommene Wasser abgibt.
Auch beim Teilprogrammschritt "Tocknen" erhitzt sich die Sorptonskolonne auf hohe Temperaturen, z. B. 150°-200°C, durch die Kondensationswärme des Wasserdampfes oder der Feuchtigkeit.
Damit kann die in dem Spülbehälter eingeleitete trockene Luft oder die Luft mit Wasserdampf Temperaturen erreichen, welche zu einem Schaden beim Geschirr, z. B. Kunststoffteile, führen können. Die Lufteintrittstemperatur in dem Spülraum muss deshalb in einer weiteren Ausführung mit einer Kühlung soweit abgesenkt werden, dass keine Schäden auftreten.
Im Teilprogrammschritt "Trocknen" wird hierzu Restwasser auf oder um die Eintrittsöffnung geleitet und dadurch der Luftstrom gekühlt. Außerdem nimmt die trockene und warme Luft einen Teil des Wassers auf, was aufgrund der Verdunstungskälte zum Abkühlen des Luftstromes führt. In einem Teilprogrammschritt mit zu erwärmender Behandlungsflüssigkeit findet durch das Spritzwasser und den Luftstrom mit Wasserdampf an der Eintrittsöffnung ein Wärmetausch statt. Vorteilhafterweise wird die Eintrittsöffnung dahingehend angelegt, dass der Luftstrom nicht unmittelbar auf das Geschirr trifft und eine ausreichende Abkühlung des Luftstroms durch das Spritzwasser statt findet.The sorption column is - as already described - preferably during a partial program step with the treatment liquid to be heated with a heater a very high temperature, z. B. 300 ° C, heated, so that the sorbent gives off the absorbed water.
Also in the partial program step "Tocknen", the Sorptonskolonne heated to high temperatures, eg. B. 150 ° -200 ° C, by the heat of condensation of water vapor or moisture.
Thus, the introduced into the washing dry air or the air with steam can reach temperatures that cause damage to the dishes, eg. B. plastic parts, can lead. The air inlet temperature in the washing compartment must therefore be lowered so far in a further embodiment with a cooling that no damage occurs.
In the sub-program step "drying" this residual water is passed on or around the inlet opening and thereby cooled the air flow. In addition, the dry and warm air absorbs part of the water, which leads due to the evaporative cooling to cool the air flow. In a partial program step with the treatment liquid to be heated, a heat exchange takes place through the spray water and the air flow with water vapor at the inlet opening. Advantageously, the inlet opening is applied to the effect that the air flow does not hit directly on the dishes and a sufficient cooling of the air flow through the spray water takes place.

Neben der Heizung zum Erhitzen der Sorptionskolonne zur Desorption - nachfolgend Luftheizug genannt - verfügt eine erfindungsgemäße Geschirrspülmaschine in einer nicht dargestellten Ausführungsform über einen Durchlauferhitzer für die Spülflotte, falls aufgrund der vorliegenden Erfindung hierauf nicht verzichtet wird.
Falls beim Teilprogrammschritt "Klarspülen" in einer weiteren Ausführung ein Aufheizen notwendig ist, kann dies entweder mit dem wie aus dem Stand der Technik bekannt Durchlauferhitzer oder mit der Luftheizung beim eingeschaltetem Gebläse erreicht werden. Der Vorteil beim Heizen mit der Luftheizung liegt darin, dass im darauffolgenden Teilprogrammschritt "Trocknen" die in der Sorptionskolonne gespeicherte Wärmeenergie zur Trocknung genutzt werden kann.In addition to the heating for heating the sorption column for desorption - hereinafter called Luftheizug - has a dishwasher according to the invention in an embodiment not shown via a water heater for the rinsing liquor, if not omitted on the basis of the present invention thereto.
If the subprogram step "rinsing" in a further embodiment, a heating is necessary, this can be achieved either with the known from the prior art water heater or with the air heater with the fan on. The advantage of heating with the air heating is that in the subsequent part program step "drying" the heat energy stored in the sorption column can be used for drying.

In einer weiteren Variante kann während des Teilprogrammschrittes mit zu erwärmender Behandlungsflüssigkeit, z. B. "Klarspülen", das Gebläse eingeschaltet werden - bei ausgeschalteter Luftheizung.In a further variant, during the partial program step with the treatment liquid to be heated, for. B. "rinse", the fan are turned on - with switched off air heating.

Dadurch wird feuchte Luft durch die Sorptionskolonne geleitet, welche die Feuchtigkeit aufnimmt, und sich durch die frei werdende Kondensationsenergie die Sorptionskolonne und damit auch die durchgeleitete Luft erwärmt. Damit kann die Kondensationswärme zum Aufheizen der Spülflotte und/oder des Geschirrs verwendet werden. Die Sorptionskolonne ist dahingehend auszulegen, dass auch im Teilprogrammschritt "Trocken" noch ein gutes Trocknungsergebnis erzielt werden kann.As a result, moist air is passed through the sorption, which absorbs the moisture, and heated by the liberated condensation energy sorption column and thus also the air passed through. Thus, the heat of condensation for heating the rinsing liquor and / or the dishes can be used. The sorption column is to be interpreted as meaning that even in the partial program step "dry" a good drying result can still be achieved.

Mit der vorliegenden Erfindung ist ein Verfahren bereitgestellt, mit dem es möglich ist, Geräte der eingangs genannten Art möglichst wirtschaftlich zu betreiben, das zu trocknende Gut effizient zu trocknen sowie den damit verbundenen Energieaufwand so gering wie möglich zu halten.With the present invention, a method is provided with which it is possible to operate devices of the type mentioned as economically as possible, to efficiently dry the material to be dried and to keep the associated energy consumption as low as possible.

Claims (4)

  1. Method for operating a dishwasher with at least one partial program step "drying",
    wherein in the at least one partial program step "drying" air is conducted from a treatment chamber, through a sorption column and back into the treatment chamber,
    wherein the sorption column contains reversibly dehydratable material and the air extracts moisture during the passage,
    wherein for the desorption of the reversibly dehydratable material the sorption column or the air in a line towards the sorption column is heated by a heater,
    characterised in that,
    for the desorption of the reversibly dehydratable material, air is conducted from the treatment chamber, through the sorption column and then back into the treatment chamber and is heated during the passage,
    and the passage of the air during a program step is performed with treatment liquid to be heated.
  2. Method according to claim 1,
    characterised in that
    the treatment liquid and/or the items to be treated are heated by the heated conducted air and the desorbed moisture from the sorption column is at least partially emitted in the treatment chamber.
  3. Method according to one of claims 1 or 2,
    characterised in that,
    in a partial program step with treatment liquid to be heated, e.g. "rinsing", air from the treatment chamber is conducted through the sorption column with the heater switched off and into the treatment chamber, wherein the air is heated by the condensation heat in the sorption column.
  4. Method according to one of claims 1 to 3,
    characterised in that the desorption of the reversibly dehydratable material is performed during the partial program step "cleaning" and/or "pre-rinsing"
EP04763100.7A 2003-07-30 2004-07-05 Method for operating a dishwasher with at least one partial programme step of drying Active EP1651093B1 (en)

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DE10334791 2003-07-30
DE10353775A DE10353775A1 (en) 2003-07-30 2003-11-18 Drying items in domestic process machines has reversible hydroscopic material filled column through which recirculated air is driven by fan
PCT/EP2004/007338 WO2005018410A1 (en) 2003-07-30 2004-07-05 Method for operating a device with at least one partial programme step of drying

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WO2005018410A1 (en) 2005-03-03

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