EP2769662A1 - Dishwasher and method for operating a dishwasher - Google Patents
Dishwasher and method for operating a dishwasher Download PDFInfo
- Publication number
- EP2769662A1 EP2769662A1 EP14154999.8A EP14154999A EP2769662A1 EP 2769662 A1 EP2769662 A1 EP 2769662A1 EP 14154999 A EP14154999 A EP 14154999A EP 2769662 A1 EP2769662 A1 EP 2769662A1
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- EP
- European Patent Office
- Prior art keywords
- dishwasher
- cleaning
- desorption
- program
- desorption process
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000003795 desorption Methods 0.000 claims abstract description 56
- 238000001179 sorption measurement Methods 0.000 claims abstract description 37
- 238000001035 drying Methods 0.000 claims abstract description 34
- 238000004140 cleaning Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002594 sorbent Substances 0.000 description 22
- 238000005406 washing Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000011017 operating method Methods 0.000 description 8
- 238000011109 contamination Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004851 dishwashing Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011086 high cleaning Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
-
- 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
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4234—Steam generating 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
- 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
- A47L2301/00—Manual input in controlling methods of washing or rinsing machines for crockery or tableware, i.e. information entered by a user
- A47L2301/04—Operation mode, e.g. delicate washing, economy washing, reduced time, sterilizing, water softener regenerating, odor eliminating or service
-
- 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
- A47L2501/11—Air heaters
-
- 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
- A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions
Definitions
- the invention relates to a method for operating a dishwasher, which has a sorption drying device.
- the invention further relates to a dishwashing machine suitable for carrying out the operating method.
- dishwashing machines for example household dishwashers
- dishwashing machines use condensation drying of the items to be cleaned.
- the rinse, the rinsing liquor ie the water in the dishwasher
- the overlying Spülraum and to be cleaned items to temperatures between about 65 ° C ( Degrees Celsius) and heated to 70 ° C, wherein the water vapor emitted from the dishes on condensing surfaces, usually the inner walls of the washing compartment, condenses out and flows to the washing liquor.
- This process requires a large amount of energy that is released into the environment and can not be used in the process.
- Dishwashers with sorption drying devices are known in which circulating air in the washing compartment is guided and dehumidified by a desiccant contained in the sorption drying apparatus, also called sorbent.
- the dehumidification of the air causes a faster drying of the dishes at lower temperatures, which can be saved compared to a condensation drying energy during the drying process.
- the moisture absorbed by the sorbent during drying is removed from the sorption drying apparatus in a desorption process and discharged into the washing compartment and thus returned to the rinsing liquor.
- the supply of energy in the form of heat is necessary, but the amount of energy supplied is less than the energy saved in the drying process compared to the condensation drying. Consequently, a net energy saving in sorption drying is possible over the condensation drying process.
- An inventive method of the type mentioned is characterized by the fact that a suitable for the delivery of moisture desorption of Sorptionstrocknungsvoriques is performed depending on a selected cleaning program of the dishwasher.
- a suitable for the delivery of moisture desorption of Sorptionstrocknungsvoriques is performed depending on a selected cleaning program of the dishwasher.
- the moisture released by the sorption drying device during the desorption process in the form of steam can be used for cleaning support.
- the sorption drying device is used so advantageous as a steam generator for cleaning items to be washed.
- the amount of heat supplied during the desorption process of the sorption drying device is selected as a function of the set cleaning program of the dishwasher.
- the amount of heat supplied can be adjusted by specifying the duration and / or the power supplied.
- the amount of heat supplied is also selected depending on a previously completed cleaning program of the dishwasher. In this way, the amount of moisture contained in the sorption drying device after a previous cleaning program can be taken into account in order to achieve a maximum cleaning effect in the current desorption process.
- a dishwasher according to the invention has a sorption drying device and a control device for controlling program sequences. It is characterized in that the control device for carrying out an inventive Operating procedure is set up. This results in the advantages mentioned in connection with the operating method.
- FIG. 1 schematically shows the structure of a set up for carrying out the method according to the invention dishwasher 1.
- the dishwasher 1 is presently designed as a household dishwasher, but the invention can also be used in conjunction with dishwashers for commercial and / or medical use.
- the dishwasher 1 has a washing compartment 2, in which dish baskets 3 for receiving the items to be cleaned, ie, for example, dishes, cookware, cutlery, are. Furthermore, in the dishwasher 1 spray arms 4 for wetting the items to be washed with a rinsing liquor 7, so the cleaning liquid located in the dishwasher 1, available.
- the bottom of the washing compartment 2 carries a Spülraumtopf 5 with a liquor heater 8 for heating the wash liquor 7 and a sieve 6 for filtering dissolved dirt particles. Furthermore, in the Spülraumtopf 5 still not shown here circulating pump and a drain pump, also not shown, are present.
- a sorption drying device 10 is arranged, which usually has a relatively bulky container with a volume of 2 to 3 liters of metal, usually stainless steel.
- the sorption drying apparatus 10 will be referred to as a sorption unit 10 for the sake of simplicity.
- an outlet 15 is the sorption 10 in direct connection with the washing compartment 2.
- the outlet 15 has a hat-shaped cover 16, which prevents the ingress of wash liquor 7 into the sorption unit 10.
- Sorbent 11 also called sorbent
- a desorption heater 12 which serves to heat the sorbent 11 and thus to expel (desorb) absorbed moisture, are located in sorption unit 10.
- moist process air 17 is sucked in a program section "drying" for dehumidifying the washing compartment 2 and the dishes via a preferably arranged in the upper region of the washing compartment 2 inlet 14 and promoted by the Sorptionstician 10, in the moisture (water vapor) of the Sorbent 11 is adsorbed.
- an exothermic reaction takes place in the sorption agent 11, which heats the sorption agent 11 to about 100 ° C. (degrees Celsius).
- the dehumidified and heated process air 18 again enters the washing compartment 2 to receive water vapor there again.
- the desorption occurs within a program section "cleaning" by means of the desorption heater 12, which heats the sorbent 11.
- the moisture bound in the sorbent 11 is conveyed as water vapor into the washing compartment 2.
- the stored energy stored in the steam helps to heat up the rinsing liquor 7, the washing compartment 2 and the dishes.
- the mineral zeolite is used, which requires a desorption temperature of up to 250 ° C.
- the sorbent 11 is typically arranged in the form of a loose ballast in the sorption unit 10.
- a contamination sensor 19 is present, which is located within the rinsing cycle - in the embodiment of FIG. 1 the pollution sensor 19 is arranged schematically within the Spülraumtopfs 5. With the help of the contamination sensor 19, the amount and partly also the type of dirt dissolved by the wash liquor 7 from the items to be washed is detected and this information is passed on to a control device, not shown, of the dishwasher 1.
- the contamination sensor 19 may be formed, for example, as an optically operating turbidity sensor.
- FIG. 2 schematically shows the structure of another embodiment of a sorption unit 10, in turn with sorbent 11, sorption heater 12 and an inlet 17 and an outlet 15, which is protected by a cover 16 before the entrance of wash liquor 7.
- the blower 13 upstream of the inlet 17 (cf. FIG. 1 ) and the desorption heater 12 is turned on.
- sorption unit 10 is located in the in FIG. 2 shown advantageous embodiment, the desorption heater 12 within the sorbent 12 to allow the most effective desorption.
- FIGS. 1 and 2 Two embodiments of an operating method for a dishwasher according to the invention are presented.
- the figures each show a time-dependent course of the temperature of the rinsing liquor in different cleaning phases of a cleaning program.
- the illustrated operating methods may be, for example, from the in FIG. 1 Dishwasher shown, possibly with the in FIG. 2 Sorption unit shown are performed. They are therefore referred to below with reference to FIGS. 1 and 2 and the reference numerals used there.
- FIG. 3 shows schematically the dependence of the temperature ⁇ of the time t in a washing program with Sorptionstrockmuddy as a first embodiment of an operating method according to the invention.
- the individual successive phases of the program are additionally indicated by lowercase letters from a to f.
- a desorption process a is carried out in which moisture is expelled from the sorption unit 10.
- the desorption heater 12 and during the heating phase b of the cleaning, the liquor heater 8 is turned on.
- the liquor heater 8 heats the wash liquor 7 to the program-specific nominal temperature.
- the heating phase of the cleaning b is followed by a holding time of the cleaning e, in which the heated rinsing liquor 7 is circulated.
- the rinsing liquor 7 is exchanged.
- the liquor heater 8 heats the rinsing liquor 7 to the rinse-off temperature before the circulating pump only circulates the rinsing liquor 7 within a holding time of the rinse-rinse g.
- the sorption drying is activated and withdrawn by means of the switched-on blower 13, the moisture of the washing compartment 2 and the dishes, passed through the sorbent 11 and stored there.
- the desorption phase has a constant duration, the desorption process usually being operated with a view to a minimal desorption time in order to minimize the energy requirement for the desorption.
- the duration of the desorption process a starting from a minimum value or reference value, which is preferably associated with the energy saving program or label program, extended at the same power supply through the desorption 12, for example, a wash program with a high cleaning temperature - preferably above 55 ° C - selected by the operator.
- a washing program with a high cleaning temperature is the so-called intensive program, which for example has a cleaning temperature of 75 ° C.
- the sorbent 11 Due to the longer desorption time a, the sorbent 11 is regenerated more strongly, ie it releases more water vapor. This additional amount of moisture in the washing compartment 2 during the desorption phase a leads to a more intensive soaking of dirt on the dishes and thus in the result to an improved cleaning. The longer and more intensive desorption is thus used in the washing program for active cleaning.
- the sorption unit 10 is used in this sense as a steam generator for cleaning purposes.
- the desorption time in the desorption process a is at most about ten minutes. However, this method assumes that in the sorbent 11 a sufficient amount of moisture is absorbed, which is usually the case.
- the absolute humidity entered into the wash compartment 2 is higher in programs with a high average wash temperature than in wash programs with a low wash temperature.
- the sorbent 11 therefore absorbs more moisture, for example in an intensive program in the drying phase d, which would again be available in a subsequent intensive program for the longer desorption process a.
- the sorbent 11 is not completely regenerated due to the shorter desorption time of the desorption process a in the energy-saving program, so that a moisture remnant remains in the sorbent 11 from the intensive program. If desired, this residual amount of moisture is later available, for example in the desorption phase of a subsequent intensive program.
- its intensity can be varied, for example by operating the desorption heater 12 at a higher power.
- FIG. 4 shows in an analogous way as FIG. 3 A second embodiment of an operating method according to the invention.
- this embodiment in addition to the program-specific adjustment of the duration (or intensity) of the desorption process a and a shift of this program section is provided in the heating phase of the cleaning.
- the heating phase of the cleaning is thus divided into two Operahasphasen the cleaning b1, b2, between which the desorption process a is performed.
- this program adaptation is carried out in the so-called automatic program, in which the contamination sensor 19 is interrogated. Only when the contamination sensor 19 has determined the degree of soiling of the items to be washed, which can take place at the earliest, for example ten minutes after the start of the heating phase of the cleaning b, can the controller of the dishwasher 1 decide up to what temperature ⁇ in the heating phase of the cleaning should be heated. From the final value of the cleaning temperature is then - as described in the first embodiment - the duration of the desorption phase a dependent. Since the automatic program is quite often used in practice, the advantages of the invention come into play here particularly.
- the desorption time is between five and ten minutes.
- the invention is not limited to the two embodiments mentioned. Thus, it makes sense in programs for sensitive items, such as in the glass program, to completely eliminate the desorption or to shorten these significantly in the so-called fine program relative to the reference value.
- the released water vapor could otherwise promote glass corrosion. In all cases, however, the degree of desorption is determined depending on the cleaning program.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Washing And Drying Of Tableware (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betreiben einer Geschirrspülmaschine, die eine Sorptionstrocknungsvorrichtung aufweist. Die Erfindung betrifft weiterhin eine zur Durchführung des Betriebsverfahrens geeignete Geschirrspülmaschine.The invention relates to a method for operating a dishwasher, which has a sorption drying device. The invention further relates to a dishwashing machine suitable for carrying out the operating method.
Konventionell wird in Geschirrspülmaschinen, beispielsweise Haushaltsgeschirrspülmaschinen, eine Kondensationstrocknung des zu reinigenden Spülguts eingesetzt. Dazu wird beispielsweise in üblichen Haushaltsgeschirrspülmaschinen am Ende des Spülprogramms nach den letzten wasserzuführenden Programmabschnitt, üblicherweise dem Klarspülen, die Spülflotte, also das sich in der Geschirrspülmaschine befindliche Wasser, der darüber liegende Spülraum und das zu reinigende Spülgut auf Temperaturen zwischen ca. 65°C (Grad Celsius) und 70°C aufgeheizt, wobei der vom Geschirr abgegebene Wasserdampf an Kondensationsflächen, meist den inneren Wänden des Spülraums, auskondensiert und der Spülflotte zufließt. Bei diesem Verfahren wird eine große Energiemenge benötigt, die an die Umgebung abgegeben wird und im Prozess nicht weiter genutzt werden kann.Conventionally, dishwashing machines, for example household dishwashers, use condensation drying of the items to be cleaned. For this purpose, for example, in conventional household dishwashers at the end of the washing program after the last water-supplying program section, usually the rinse, the rinsing liquor, ie the water in the dishwasher, the overlying Spülraum and to be cleaned items to temperatures between about 65 ° C ( Degrees Celsius) and heated to 70 ° C, wherein the water vapor emitted from the dishes on condensing surfaces, usually the inner walls of the washing compartment, condenses out and flows to the washing liquor. This process requires a large amount of energy that is released into the environment and can not be used in the process.
Darüber hinaus sind beispielsweise aus der Druckschrift
Aus der Druckschrift
Ausgehend von dem bekannten Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, ein Verfahren zum Betreiben einer Geschirrspülmaschine anzugeben, bei dem die im Desorptionsvorgang eingesetzte Energie möglichst gewinnbringend für die Qualität des durchgeführten Reinigungsvorgangs eingesetzt wird. Es ist eine weitere Aufgabe, eine zur Durchführung des Verfahrens geeignete Geschirrspülmaschine anzugeben.Based on the known prior art, it is an object of the present invention to provide a method for operating a dishwasher, in which the energy used in the desorption process is used as profitably as possible for the quality of the performed cleaning process. It is a further object to provide a dishwashing machine suitable for carrying out the method.
Diese Aufgabe wird gelöst durch ein Verfahren zum Betreiben einer Geschirrspülmaschine sowie eine Geschirrspülmaschine mit den Merkmalen des jeweiligen unabhängigen Anspruchs.This object is achieved by a method for operating a dishwasher and a dishwasher with the features of the respective independent claim.
Ein erfindungsgemäßes Verfahren der eingangs genannten Art zeichnet sich dadurch aus, dass ein zur Abgabe von Feuchtigkeit geeigneter Desorptionsvorgang der Sorptionstrocknungsvorrichtung abhängig von einem gewählten Reinigungsprogramm der Geschirrspülmaschine durchgeführt wird. Auf diese Weise kann die von der Sorptionstrocknungsvorrichtung beim Desorptionsvorgang in Form von Dampf abgegebene Feuchtigkeit reinigungsunterstützend eingesetzt werden. Die Sorptionstrocknungsvorrichtung wird so vorteilhaft als ein Dampfgenerator zur Reinigung von Spülgut eingesetzt.An inventive method of the type mentioned is characterized by the fact that a suitable for the delivery of moisture desorption of Sorptionstrocknungsvorrichtung is performed depending on a selected cleaning program of the dishwasher. In this way, the moisture released by the sorption drying device during the desorption process in the form of steam can be used for cleaning support. The sorption drying device is used so advantageous as a steam generator for cleaning items to be washed.
In einer vorteilhaften Ausgestaltung des Verfahrens wird die bei dem Desorptionsvorgang der Sorptionstrocknungsvorrichtung zugeführte Wärmemenge abhängig von dem eingestellten Reinigungsprogramm der Geschirrspülmaschine gewählt. Dabei kann die zugeführte Wärmemenge durch eine Vorgabe der Dauer und/oder der zugeführten Leistung eingestellt werden. In einer weiteren vorteilhaften Ausgestaltung des Verfahrens wird die zugeführte Wärmemenge zudem abhängig von einem zuvor durchlaufenen Reinigungsprogramm der Geschirrspülmaschine gewählt. Auf diese Weise kann die in der Sorptionstrocknungsvorrichtung nach einem vorherigen Reinigungsprogramm enthaltene Feuchtigkeitsmenge berücksichtigt werden, um im aktuellen Desorptionsvorgang eine maximale Reinigungswirkung zu erzielen.In an advantageous embodiment of the method, the amount of heat supplied during the desorption process of the sorption drying device is selected as a function of the set cleaning program of the dishwasher. In this case, the amount of heat supplied can be adjusted by specifying the duration and / or the power supplied. In a further advantageous embodiment of the method, the amount of heat supplied is also selected depending on a previously completed cleaning program of the dishwasher. In this way, the amount of moisture contained in the sorption drying device after a previous cleaning program can be taken into account in order to achieve a maximum cleaning effect in the current desorption process.
Weitere vorteilhafte Ausgestaltungen und Weiterbildungen des Verfahrens sind Gegenstand der abhängigen Ansprüche.Further advantageous embodiments and further developments of the method are the subject of the dependent claims.
Eine erfindungsgemäße Geschirrspülmaschine weist eine Sorptionstrocknungsvorrichtung und eine Steuervorrichtung zur Steuerung von Programmabläufen auf. Sie zeichnet sich dadurch aus, dass die Steuervorrichtung zur Durchführung eines erfindungsgemäßen Betriebsverfahrens eingerichtet ist. Es ergeben sich die im Zusammenhang mit dem Betriebsverfahren genannten Vorteile.A dishwasher according to the invention has a sorption drying device and a control device for controlling program sequences. It is characterized in that the control device for carrying out an inventive Operating procedure is set up. This results in the advantages mentioned in connection with the operating method.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen mithilfe von Figuren näher dargestellt. Die Figuren zeigen:
Figur 1- eine schematische Ansicht einer Geschirrspülmaschine;
Figur 2- eine schematische Darstellung einer Sorptionstrocknungsvorrichtung für eine Geschirrspülmaschine;
Figur 3- ein schematisches Diagramm, das den Temperaturverlauf und die durchlaufenden Phasen bei einem ersten Ausführungsbeispiel eines anmeldungsgemäßen Betriebsverfahrens darstellt und
Figur 4- ein schematisches Diagramm, das den Temperaturverlauf und die durchlaufenden Phasen bei einem zweiten Ausführungsbeispiel eines anmeldungsgemäßen Betriebsverfahrens darstellt.
- FIG. 1
- a schematic view of a dishwasher;
- FIG. 2
- a schematic representation of a Sorptionstrocknungsvorrichtung for a dishwasher;
- FIG. 3
- a schematic diagram illustrating the temperature profile and the phases passing through in a first embodiment of an operating method according to the application and
- FIG. 4
- a schematic diagram illustrating the temperature profile and the continuous phases in a second embodiment of a method according to the application according to the application.
Die Geschirrspülmaschine 1 weist einen Spülraum 2 auf, in dem sich Geschirrkörbe 3 zur Aufnahme des zu reinigenden Spülguts, also beispielsweise Geschirr, Kochgeschirr, Besteck, befinden. Ferner sind bei der Geschirrspülmaschine 1 Sprüharme 4 zur Benetzung des Spülguts mit einer Spülflotte 7, also der sich in der Geschirrspülmaschine 1 befindlichen Reinigungsflüssigkeit, vorhanden. Der Boden des Spülraums 2 trägt einen Spülraumtopf 5 mit einer Flottenheizung 8 zum Erwärmen der Spülflotte 7 und einem Sieb 6 zum Filtern von gelösten Schmutzpartikeln. Weiterhin sind im Spülraumtopf 5 noch eine hier nicht dargestellte Umwälzpumpe und eine ebenfalls nicht gezeigte Ablaufpumpe vorhanden.The
Außerhalb des Spülraums 2, vorzugsweise in der Bodenbaugruppe unterhalb des Bodens des Spülraums 2, ist eine Sorptionstrocknungsvorrichtung 10 angeordnet, die üblicherweise einen relativ voluminösen Behälter mit einem Rauminhalt von 2 bis 3 Litern aus Metall, meist Edelstahl, aufweist. Nachfolgend wird die Sorptionstrocknungsvorrichtung 10 vereinfachend auch als Sorptionseinheit 10 bezeichnet. Über einen Auslass 15 steht die Sorptionseinheit 10 in direkter Verbindung mit dem Spülraum 2. Der Auslass 15 weist eine hutförmige Abdeckung 16 auf, die den Eintritt von Spülflotte 7 in die Sorptionseinheit 10 verhindert.Outside the
In der Sorptionseinheit 10 befindet sich Sorptionsmittel 11, auch Sorbens genannt, sowie eine Desorptionsheizung 12, die der Erwärmung des Sorptionsmittels 11 und damit zur Austreibung (Desorption) von aufgenommener Feuchtigkeit dient.Sorbent 11, also called sorbent, and a
Mittels eines Gebläses 13 wird zum Entfeuchten des Spülraums 2 und des Spülguts über einen vorzugsweise im oberen Bereich des Spülraums 2 angeordneten Einlass 14 feuchte Prozessluft 17 in einem Programmabschnitt "Trocknen" angesaugt und durch die Sorptionseinheit 10 gefördert, in der Feuchtigkeit (Wasserdampf) von dem Sorptionsmittel 11 adsorbiert wird. Dabei läuft in dem Sorptionsmittel 11 eine exotherme Reaktion ab, die das Sorptionsmittel 11 auf ca. 100°C (Grad Celsius) erwärmt. Durch den Auslass 15 tritt die entfeuchtete und erwärmte Prozessluft 18 wieder in den Spülraum 2, um dort erneut Wasserdampf aufzunehmen.By means of a
Die Desorption geschieht innerhalb eines Programmabschnitts "Reinigen" mittels der Desorptionsheizung 12, die das Sorptionsmittel 11 erhitzt. Bei gleichzeitigem Betrieb des Gebläses 13 wird die in dem Sorptionsmittel 11 gebundene Feuchtigkeit als Wasserdampf in den Spülraum 2 gefördert. Hier hilft die in dem abgeförderten Wasserdampf gespeicherte Energie beim Aufheizen der Spülflotte 7, des Spülraums 2 und des Spülguts. In der Sorptionseinheit 10 findet beispielsweise das Mineral Zeolith Verwendung, welches eine Desorptionstemperatur von bis zu 250°C benötigt. Das Sorptionsmittel 11 wird in der Regel in der Form einer losen Kugelschüttung in der Sorptionseinheit 10 angeordnet.The desorption occurs within a program section "cleaning" by means of the
Weiterhin ist bei der Geschirrspülmaschine 1 ein Verschmutzungssensor 19 vorhanden, der sich innerhalb des Spülkreislaufs befindet - in dem Ausführungsbeispiel der
Im Zusammenhang mit den
Vor einer Heizphase eines Reinigens b wird ein Desorptionsvorgang a durchlaufen, in dem Feuchtigkeit aus der Sorptionseinheit 10 ausgetrieben wird. In dem Desorptionsvorgang a, der auch als Desorptionsphase bezeichnet wird, ist die Desorptionsheizung 12 und während der Heizphase b der Reinigens ist die Flottenheizung 8 eingeschaltet. Die Flottenheizung 8 erwärmt die Spülflotte 7 auf die programmspezifische Nenntemperatur.Before a heating phase of a cleaning b, a desorption process a is carried out in which moisture is expelled from the
Der Heizphase des Reinigens b folgt eine Haltezeit des Reinigens e, in der die erwärmte Spülflotte 7 umgewälzt wird. Für ein anschließendes Zwischenspülen f wird die Spülflotte 7 ausgetauscht. Vor einer Heizphase eines Klarspülens c findet erneut ein Wechsel der Spülflotte 7 statt. Innerhalb der Heizphase des Klarspülens c erwärmt die Flottenheizung 8 die Spülflotte 7 auf die Klarspülendtemperatur, bevor innerhalb einer Haltezeit des Klarspülens g die Umwälzpumpe die Spülflotte 7 nur noch umwälzt. In der finalen Trocknungsphase d wird die Sorptionstrocknung aktiviert und mittels des einschalteten Gebläses 13 die Feuchtigkeit dem der Spülraum 2 sowie dem Spülgut entzogen, durch das Sorptionsmittel 11 geführt und dort gespeichert.The heating phase of the cleaning b is followed by a holding time of the cleaning e, in which the
Gemäß dem Stand der Technik weist die Desorptionsphase eine konstante Dauer auf, wobei der Desorptionsvorgang üblicherweise im Hinblick auf eine minimale Desorptionszeit betrieben wird, um den Energiebedarf für die Desorption möglichst gering zu halten. Dieses gilt insbesondere für die im Rahmen von Normprüfungen genutzten Energiesparprogramme. Erfindungsgemäß wird in der ersten Ausführungsform die Dauer des Desorptionsvorgangs a ausgehend von einem Minimalwert oder Referenzwert, der vorzugsweise dem Energiesparprogramm bzw. Labelprogramm zugeordnet ist, bei gleicher Leistungszufuhr durch die Desorptionsheizung 12 verlängert, wenn beispielsweise ein Spülprogramm mit einer hohen Reinigungstemperatur - vorzugsweise oberhalb von 55°C - vom Bediener angewählt wird. Ein Beispiel für ein Spülprogramm mit einer hohen Reinigungstemperatur stellt das sogenannte Intensivprogramm dar, das z.B. eine Reinigungstemperatur von 75°C aufweist. Durch die längere Desorptionsdauer a wird das Sorptionsmittel 11 stärker regeneriert, gibt also mehr Wasserdampf ab. Diese Mehrabgabe an Feuchtigkeit in den Spülraum 2 während der Desorptionsphase a führt zu einem intensiveren Einweichen von Verschmutzungen auf dem Spülgut und somit im Ergebnis zu einer verbesserten Reinigung. Die längere und intensivere Desorption wird somit im Spülprogramm zur aktiven Reinigung genutzt. Die Sorptionseinheit 10 wird in diesem Sinne als ein Dampferzeuger zu Reinigungszwecken eingesetzt. Vorteilhafterweise beträgt die Desorptionszeit bei dem Desorptionsvorgang a maximal etwa zehn Minuten. Dieses Verfahren setzt allerdings voraus, dass im Sorptionsmittel 11 eine ausreichende Menge an Feuchtigkeit absorbiert ist, was im Regelfall gegeben ist.According to the prior art, the desorption phase has a constant duration, the desorption process usually being operated with a view to a minimal desorption time in order to minimize the energy requirement for the desorption. This applies in particular to energy-saving programs used in standard tests. According to the invention in the first embodiment, the duration of the desorption process a starting from a minimum value or reference value, which is preferably associated with the energy saving program or label program, extended at the same power supply through the
Da warme Luft mehr Feuchtigkeit aufnehmen als kalte, ist die in den Spülraum 2 eingetragene absolute Feuchte in Programmen mit einer hohen mittleren Spültemperatur höher als in Spülprogrammen mit einer niedrigen Spültemperatur. Das Sorptionsmittel 11 nimmt daher beispielsweise in einem Intensivprogramm in der Trocknungsphase d wieder mehr Feuchtigkeit auf, die in einem nachfolgenden Intensivprogramm für den längeren Desorptionsvorgang a wieder zur Verfügung stehen würde.Since warm air absorbs more moisture than cold, the absolute humidity entered into the
Wenn beispielsweise im Anschluss an ein vollständig durchlaufenes Intensivprogramm wieder mit einem Energiesparprogramm gespült wird, wird aufgrund der kürzeren Desorptionsdauer des Desorptionsvorgangs a im Energiesparprogramm das Sorptionsmittel 11 nicht vollständig regeneriert, sodass eine Feuchteremanenz aus dem Intensivprogramm im Sorptionsmittel 11 verbleibt. Diese Restmenge an Feuchtigkeit steht bei Bedarf dann später zur Verfügung, beispielsweise in der Desorptionsphase eines nachfolgenden Intensivprogramms.For example, if an energy-saving program is rinsed again following a complete intensive program, the
Sollte allerdings doch einmal nicht genügend Feuchtigkeit im Sorptionsmittel 11 absorbiert sein, beispielsweise weil ein vorhergehendes Intensivprogramm, bei dem entsprechend alle Feuchtigkeit aus dem Sorptionsmittel 11 entfernt wurde, abgebrochen wurde und die Trocknungsphase d, in der wieder Feuchtigkeit hätte aufgenommen werden können, unterblieben ist, kann vorgesehen sein, den Desorptionsvorgang a zu verkürzen und stattdessen die Dauer der Haltezeit des Reinigens e zu verlängern, um insgesamt einem vergleichbaren Reinigungseffekt zu erzielen.However, should not enough moisture in the
In einer alternativen Ausgestaltung kann anstelle der Dauer des Desorptionsvorgangs a dessen Intensität variiert werden, beispielsweise indem die Desorptionsheizung 12 mit höherer Leistung betrieben wird.In an alternative embodiment, instead of the duration of the desorption process a, its intensity can be varied, for example by operating the
Vorzugsweise wird diese Programmanpassung im sogenannten Automatikprogramm, in dem der Verschmutzungssensor 19 abgefragt wird, vorgenommen. Erst wenn der Verschmutzungssensor 19 den Verschmutzungsgrad des Spülguts ermittelt hat, was frühestens einige, beispielsweise zehn Minuten nach dem Start der Heizphase des Reinigens b erfolgen kann, kann von der Steuerungsvorrichtung des Geschirrspülers 1 entschieden werden, bis zu welcher Temperatur ϑ in der Heizphase des Reinigens geheizt werden soll. Vom Endwert der Reinigungstemperatur ist dann auch - wie im ersten Ausführungsbeispiel beschrieben - die Dauer der Desorptionsphase a abhängig. Da das Automatikprogramm in der Praxis durchaus häufig Verwendung findet, kommen die Vorteile der Erfindung hier besonders zum Tragen. Vorteilhafterweise liegt die Desorptionszeit hier zwischen fünf und zehn Minuten.Preferably, this program adaptation is carried out in the so-called automatic program, in which the
Es versteht sich, dass die Erfindung nicht auf die beiden genannten Ausführungsbeispiele beschränkt ist. So ist es sinnvoll, in Programmen für empfindliches Spülgut, wie beispielsweise im Glasprogramm, die Desorption vollständig entfallen zu lassen oder diese im sogenannten Feinprogramm relativ zum Referenzwert erheblich zu verkürzen. Der freigesetzte Wasserdampf könnte andernfalls Glaskorrosion begünstigen. In allen Fällen wird jedoch der Desorptionsgrad abhängig von dem Reinigungsprogramm festgelegt.It is understood that the invention is not limited to the two embodiments mentioned. Thus, it makes sense in programs for sensitive items, such as in the glass program, to completely eliminate the desorption or to shorten these significantly in the so-called fine program relative to the reference value. The released water vapor could otherwise promote glass corrosion. In all cases, however, the degree of desorption is determined depending on the cleaning program.
- 11
- Geschirrspülerdishwasher
- 22
- SpülraumWash cabinet
- 33
- Geschirrkorbdish rack
- 44
- Sprüharmspray arm
- 55
- SpülraumtopfSpülraumtopf
- 66
- Siebscree
- 77
- Spülflotterinsing
- 88th
- Flottenheizungfleet Heating
- 1010
- Sorptionseinheitsorption
- 1111
- Sorptionsmittel bzw. SorbensSorbent or sorbent
- 1212
- Desorptionsheizung bzw. HeizmittelDesorption heating or heating means
- 1313
- Gebläsefan
- 1414
- Einlassinlet
- 1515
- Auslassoutlet
- 1616
- Abdeckungcover
- 1717
- Prozessluft, feuchtProcess air, humid
- 1818
- Prozessluft, erwärmt, trockenProcess air, heated, dry
- 1919
- Verschmutzungssensorclogging sensor
- aa
- Desorptionsvorgangdesorption
- bb
- Heizphase ReinigenHeating phase Clean
- b1, b2b1, b2
- Teilheizphase ReinigenPartial heating phase cleaning
- cc
- Heizphase KlarspülenHeating phase rinse
- dd
- Sorptionsphase bzw. TrocknungsphaseSorption phase or drying phase
- ee
- Haltezeit ReinigenHold time Clean
- ff
- Zwischenspülenintermediate rinse
- gG
- Haltezeit KlarspülenHold rinse time
Claims (8)
Priority Applications (1)
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PL14154999T PL2769662T3 (en) | 2013-02-20 | 2014-02-13 | Dishwasher and method for operating a dishwasher |
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DE102013101673.1A DE102013101673A1 (en) | 2013-02-20 | 2013-02-20 | Dishwasher and method for operating a dishwasher |
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EP2769662A1 true EP2769662A1 (en) | 2014-08-27 |
EP2769662B1 EP2769662B1 (en) | 2021-07-21 |
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US (1) | US9810481B2 (en) |
EP (1) | EP2769662B1 (en) |
DE (1) | DE102013101673A1 (en) |
ES (1) | ES2880815T3 (en) |
PL (1) | PL2769662T3 (en) |
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DE102017208440B4 (en) * | 2017-05-18 | 2019-05-02 | BSH Hausgeräte GmbH | Method for operating a dishwasher and dishwasher |
DE102021207644A1 (en) * | 2021-07-19 | 2023-01-19 | BSH Hausgeräte GmbH | Household dishwashing machine with a sorption drying system and associated method for carrying out an energy-saving dishwashing program |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102008038504A1 (en) | 2008-08-20 | 2010-02-25 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher machine i.e. household dishwasher machine, for kitchen, has channel generating air exchange between washing- and sorption containers, where sorption container is accommodated in base assembly below base of washing container |
DE102008043548A1 (en) * | 2008-11-07 | 2010-05-12 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a dishwasher |
DE102008043576A1 (en) | 2008-11-07 | 2010-05-12 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a dishwasher |
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US5611867A (en) * | 1995-04-12 | 1997-03-18 | Maytag Corporation | Method of selecting a wash cycle for an appliance |
US6434857B1 (en) * | 2000-07-05 | 2002-08-20 | Smartclean Jv | Combination closed-circuit washer and drier |
PL2323531T3 (en) * | 2008-07-28 | 2015-03-31 | Bsh Hausgeraete Gmbh | Dishwasher comprising a sorption drying system |
AU2009275942A1 (en) * | 2008-07-28 | 2010-02-04 | Bsh Bosch Und Siemens Hausgerate Gmbh | Dishwasher machine comprising a sorption drying device in a sub-module |
DE102009029149A1 (en) * | 2009-09-02 | 2011-03-03 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher and associated control method |
-
2013
- 2013-02-20 DE DE102013101673.1A patent/DE102013101673A1/en not_active Withdrawn
-
2014
- 2014-02-13 ES ES14154999T patent/ES2880815T3/en active Active
- 2014-02-13 EP EP14154999.8A patent/EP2769662B1/en active Active
- 2014-02-13 PL PL14154999T patent/PL2769662T3/en unknown
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DE102008038504A1 (en) | 2008-08-20 | 2010-02-25 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher machine i.e. household dishwasher machine, for kitchen, has channel generating air exchange between washing- and sorption containers, where sorption container is accommodated in base assembly below base of washing container |
DE102008043548A1 (en) * | 2008-11-07 | 2010-05-12 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a dishwasher |
DE102008043576A1 (en) | 2008-11-07 | 2010-05-12 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a dishwasher |
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US20140230268A1 (en) | 2014-08-21 |
DE102013101673A1 (en) | 2014-08-21 |
US9810481B2 (en) | 2017-11-07 |
PL2769662T3 (en) | 2021-12-06 |
EP2769662B1 (en) | 2021-07-21 |
ES2880815T3 (en) | 2021-11-25 |
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