EP2618712B1 - Lave-vaisselle, en particulier lave-vaisselle ménager - Google Patents

Lave-vaisselle, en particulier lave-vaisselle ménager Download PDF

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Publication number
EP2618712B1
EP2618712B1 EP11757289.1A EP11757289A EP2618712B1 EP 2618712 B1 EP2618712 B1 EP 2618712B1 EP 11757289 A EP11757289 A EP 11757289A EP 2618712 B1 EP2618712 B1 EP 2618712B1
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EP
European Patent Office
Prior art keywords
dishwasher
air
interior
sterilisation
hot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11757289.1A
Other languages
German (de)
English (en)
Other versions
EP2618712A2 (fr
Inventor
Helmut Jerg
Roland Rieger
Michael Georg Rosenbauer
Thomas Wachinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL11757289T priority Critical patent/PL2618712T3/pl
Publication of EP2618712A2 publication Critical patent/EP2618712A2/fr
Application granted granted Critical
Publication of EP2618712B1 publication Critical patent/EP2618712B1/fr
Active legal-status Critical Current
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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
    • A47L15/0036—Steam or sterilizing phases
    • 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
    • A47L15/4236—Arrangements to sterilize or disinfect dishes or washing liquids
    • 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
    • A47L2501/34—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 dishwasher, in particular household dishwasher, according to the preamble of claim 1 and a method for operating such a dishwasher according to claim 13.
  • the sterilization or sterilization of rinsing liquid or items to be washed by chemical methods, such as a chlorine or ozone treatment done.
  • the sterilization / sterilization can be carried out without additional substances by UV irradiation of the items to be washed or the rinsing liquid within the rinsing space.
  • a dishwashing machine is known, are provided in the UV radiation elements, inter alia, in the washing or in the sump to irradiate the circulating rinsing liquid and / or the dishes.
  • the arrangement of the UV radiation elements requires extensive structural adjustments of the washing and the sump. In the event of a technical defect of a UV radiation element, dismantling from the washing container or pump sump is also complicated in terms of assembly technology. In addition, the UV rays are effective only in very low water penetration depth and only with a sufficiently long irradiation time, whereby the efficiency in the sterilization is impaired overall.
  • the WO 2005/018410 A1 deals only with a method for operating a device with at least one partial program step "drying" in which air is passed from a treatment room and / or from ambient air through a sorption column and into the treatment room.
  • the sorbent column contains reversibly dehydratable material and removes moisture from the air during passage.
  • EP 0 262 451 A2 is a method for drying and sterilizing Good specified in a drying and sterilization cabinet in the hospital area, wherein both the drying and the sterilization of tissue in the same treatment room in a stationary or in hanging, performed in a mechanically non-moving state and the sterilization is carried out immediately after drying.
  • the air flow is guided in an inner and in an outer circuit.
  • a condensation and cooling unit both systems are in contact with each other in terms of energy.
  • the condensation is adjusted by means of the condensation and cooling unit after the end of the drying. After sterilization, the condensation and cooling unit is cooled.
  • the object of the invention is to provide a dishwashing machine in which effective sterilization or sterilization of the dishes can be achieved by simple means.
  • the dishwasher has a sterilization unit with which hot and dry air is introduced into the washing compartment for sterilizing the items to be washed arranged in the washing compartment.
  • the sterilization / sterilization is not carried out by UV irradiation, but rather by a hot air sterilization in which acts by air supply from the outside the items to be washed with hot and dry air for a sufficiently long treatment time on the dishes.
  • the cell death of bacteria / viruses by the dry air is based on the denaturation of proteins. This is mainly an oxidative process.
  • the sterilization process is temporally superimposed on a rinse cycle or at least a partial rinse cycle of a selected dishwasher program.
  • the sterilization process thus takes place parallel to the rinse cycle, so that the total operating time for cleaning the items to be cleaned does not increase overall.
  • the hot air sterilization is preferably carried out during a partial program step of the rinse cycle, in particular during a partial program step without liquid feed.
  • the rinse final drying step is achieved in an advantageous manner that at first in the Drying step carried out sterilization the sterilized items to be washed is not contaminated by a subsequent part program step with liquid insert, if necessary.
  • the introduced for sterilization in the wash hot air in particular a humidity of less than 20% and a temperature in the range between 60 ° C and 80 ° C, in particular between 70 ° C and 80 ° C, has.
  • the sterilization process may preferably take place during the entire duration of the drying step.
  • the sterilization unit can preferably have a hot-air blower which is arranged outside the dishwasher's washing compartment and is fluidically connected to the dishwasher's washing compartment via an air inlet.
  • a hot-air blower With the hot air blower enough dry air, possibly ambient air, are sucked in and heated by means of a heating element.
  • the thus generated dry and hot air can then especially at Implementation of the drying step of the respective wash cycle are introduced into the wash compartment.
  • the introduction of the dry hot air results in an air mixture in the washing compartment, which in comparison to a resulting during a conventional condensation drying air substantially reduced humidity and a greatly increased air temperature, whereby the sterilization process is supported.
  • an air outlet line opens into the washing compartment.
  • the dry and hot air can be introduced, while at the same time the humid air can be guided out of the washing room.
  • the humidity of the adjusting air in the dishwasher air mixture is further reduced and correspondingly improves the sterilization effect.
  • the dry and hot air can be introduced through a supply line into the washing compartment, while at the same time the still moist washing chamber air is discharged from the washing compartment through an outlet line.
  • the sterilization unit forms a closed air circuit together with the supply line, the washing compartment and the outlet line. In the drying step, therefore, humid air is first led out of the flushing chamber via the outlet line into the sterilization unit.
  • the sterilization unit has a drying device that removes moisture from the washing compartment air. By means of the above-mentioned hot air blower, the dry air thus generated can then be heated and returned to the washing compartment.
  • the drying device can be a sorption column with a reversibly dehydratable material which extracts water for carrying out the sterilization of the moist dishwashing air and stores it in an absorption process in the sorption material of the sorption column.
  • the water stored in the desiccant can be released again in a desaturation occurring in an advantageous manner as a separate sterilization process at a desorption in which the stored amount of water is released as water vapor under heating of the desiccant and recycled via the supply line into the washing compartment.
  • the dry and hot air must be generated with additional expenditure of energy.
  • the electronic control device in particular control and / or regulating device
  • the dishwasher evaluates based on predetermined criteria, whether the rinse carried out in an energy-saving first mode without sterilization or in an energy consuming second mode with the sterilization of the dishes shall be.
  • the control device is associated with a user-operable switch, upon actuation of which the control device switches over between the first and the second operating mode.
  • the drying device of the sterilization unit can expediently be a sorption column with reversibly dehydratable material.
  • the material may expediently be designed so that a sufficiently large heat of absorption is generated during the absorption, which can at least partially serve to heat the now dried air which has been led into the flushing space.
  • the already mentioned heating element can be switched on to heat the dried air sufficiently.
  • the heating element in terms of process technology, it is particularly preferred here for the heating element to be able to be used both during the sterilization process and in a double function during the regeneration process already mentioned.
  • the heating element can be connected in a connecting line between the washing compartment and the drying device.
  • the air flowing into the drying device can be heated by the heating element. The hot air thus produced subsequently heats the reversibly hydrogenatable desiccant, whereby the desorption is started.
  • the control device in particular the control and / or regulating device, can be the heating element, possibly advantageously in a controller and / or in a closed-loop control system adjust or influence so that the given hot air temperature results. It is preferred in this case if the heating element during sterilization with a, compared to the regeneration process reduced power and / or is controlled clocked.
  • Fig. 1 is roughly schematically shown a dishwasher with a washing container 1, in which not shown, to be cleaned dishes in dish racks 3, 5 can be arranged.
  • a washing container 1 shown two spraying arms 7, 9 provided in different spraying levels, in particular rotatably mounted, are arranged by way of example, via which the washware to be cleaned is supplied with washing liquid.
  • a pump pot 11 is provided with a circulating pump 13, which is connected via feed lines 14, 15 fluidly connected to the spray arms 7, 9.
  • the sump 11 is also connected via connecting pieces with a fresh water supply line 16 coupled to the water supply network and with a discharge line 17 in which a sump pump 18 for pumping out the liquid from the rinsing container 1 is arranged.
  • the rinsing container 1 has in its upper region an outlet opening 19, which is connected via a connecting line 21 with a sorption column 22 of a sterilization unit 20, whose operation is described later.
  • a connecting line 21 to the sorption column 22 an air blower 23 and a heating element 24 is connected.
  • the sorption column 22 contains as a drying agent a reversibly dehydratable material, such as. For example, zeolite, with which the wet dishwashing air is dried in a later described drying step T of the rinse.
  • a high-humidity laden air stream is directed by means of the air blower 23 from the washing compartment through the sorption column 22.
  • the zeolite provided in the sorption column 22 absorbs the moisture of the air and returns the thus dried air back into the washing compartment.
  • the amount of water m stored in the zeolite during the drying step T can be released again in a regeneration process, that is to say in the case of desorption, by heating the desiccant of the sorption column 22.
  • a stream of air heated by the heating element 24 to very high temperatures is passed through the sorption column 22. With the hot air flow, the water stored in the zeolite is released as hot water vapor and returned via the air inlet 27 back into the washing compartment 1.
  • the sterilization unit 20 performs the hot air sterilization at the same time as the drying step T of the rinse cycle.
  • moist rinsing room air is first conducted by means of the blower 23 via the connecting line 21 into the sorption column 22.
  • the zeolite contained therein removes moisture from the wash compartment air, thereby releasing heat of absorption.
  • the air stream emerging from the sorption column 22 is heated, whereby not only comparatively dry air, but also hot air is returned to the washing container 1 again.
  • the sorption column 22 is designed in such a way that the dried and hot air returned to the washing compartment has a relative humidity of less than 20% and a temperature of between 60 ° C. and 80 ° C.
  • the heat of absorption released during drying I may not be sufficient to achieve the required sterilization temperature in the range between 60 ° C and 80 ° C.
  • the heating element 24 may additionally be activated to obtain the required sterilization temperature.
  • Fig. 2 is a temporal program sequence with the individual partial program steps of a rinse, namely pre-rinse V, cleaning R, intermediate rinse Z, rinse K and drying T, illustrated.
  • the Indian Fig. 2 Rinse shown with a solid line is performed in an energy-saving first mode I without sterilization.
  • Fig. 2 shown in a second, energy-consuming mode II rinse which is identical to the first mode I shown except for the drying step shown in dashed line T shown.
  • the regeneration process takes place in the sorption column 22 in the time interval .DELTA.t R instead.
  • the regeneration process ⁇ t R starts according to Fig. 2 at the beginning of the cleaning step R at time t 0 .
  • the amount of water stored in the desiccant m is returned as water vapor in the washing compartment 1. This amount of water was withdrawn in the drying step T of the previous rinse during an absorption process .DELTA.t A to be dried, laden with moisture Spülraum-air.
  • a heating phase .DELTA.t H the heating of the washing liquid by means of a in the Fig.
  • the controller 25 is in signal communication with a changeover switch 26 which is manually operable by the user.
  • a changeover switch 26 which is manually operable by the user.
  • the moisture-laden cooling space-air conveyed from the washing compartment into the sorption column 22 is additionally heated by the heating element 24.
  • the heating power introduced in this case is dimensioned so that it is far below an activation temperature for activating a desorption in the sorption column 22.
  • the pre-heated by means of the heating element 24, laden with moisture rinsing room air is dehydrated in the sorption column 22, namely with further heating of the air flow due to the heat of absorption arising.
  • a dried air flow is returned via the air inlet 27 into the washing compartment, the temperature of which is substantially increased in comparison to the drying step T of the first operating mode I.
  • the drying step T Spülraumtemperatur is increased so that an effective hot air sterilization of the dishes can be adjusted.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (13)

  1. Lave-vaisselle, en particulier lave-vaisselle ménager, avec un espace de lavage pouvant être chargé de vaisselle et avec un dispositif de contrôle (25), en particulier un dispositif de commande et/ou de contrôle pour le réglage, en particulier la commande et/ou la régulation d'étapes de programme partielles d'un cycle de lavage, par exemple le prélavage (V), le lavage (R), le rinçage intermédiaire (Z), le rinçage (K) et le séchage (T), caractérisé en ce que le lave-vaisselle présente une unité de stérilisation à air chaud (20), qui comprend un dispositif de séchage (22) présentant un moyen de séchage déshydrogénable réversible, dans lequel le dispositif de séchage (22) est aménagé afin d'extraire de l'humidité à l'air de l'espace de lavage, et dans lequel l'unité de stérilisation à air chaud (20) permet d'introduire de l'air chaud et sec dans l'espace de lavage pour la stérilisation de la vaisselle se trouvant dans l'espace de lavage, dans lequel le dispositif de contrôle (25) permet de réaliser le cycle de lavage dans un premier mode de fonctionnement (I) économe en énergie sans stérilisation ou dans un deuxième mode de fonctionnement (II) énergivore avec stérilisation de la vaisselle.
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce que l'unité de stérilisation à air chaud (20) présente une entrée d'air (27) via laquelle l'air chaud et sec nécessaire à la stérilisation peut être introduit dans l'espace de lavage, en particulier durant l'exécution du cycle de lavage respectif.
  3. Lave-vaisselle selon la revendication 1 ou 2, caractérisé en ce que l'air chaud et sec peut être introduit dans l'espace de lavage durant une étape de séchage (T) terminant le cycle de lavage.
  4. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que l'unité de stérilisation à air chaud (20) présente une sortie d'air (19) via laquelle l'air de l'espace de lavage humide peut être mené de l'espace de lavage dans l'unité de stérilisation (20).
  5. Lave-vaisselle selon la revendication 4, caractérisé en ce que l'unité de stérilisation (20) est couplée avec l'espace de lavage dans un circuit d'air fermé, au moyen duquel l'air de l'espace de lavage humide peut être renvoyé, après séchage et chauffage, sous forme d'air chaud et sec dans l'espace de lavage.
  6. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que le dispositif de séchage (22) est aménagé afin d'extraire, dans l'étape de séchage (T) du cycle de lavage respectif l'humidité de l'air de l'espace de lavage et de chauffer cet air de l'espace de lavage, ainsi que de le renvoyer sous forme d'air chaud et sec dans l'espace de lavage.
  7. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que l'air introduit par l'unité de stérilisation à air chaud (20) dans l'espace de lavage à des fins de stérilisation présente une humidité (ϕ) inférieure à 20% et une température dans la plage entre 60°C et 80°C.
  8. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que le lave-vaisselle présente un commutateur (26) activable par l'utilisateur, lequel permet de passer du premier au deuxième mode de fonctionnement (I, II) et vice versa.
  9. Lave-vaisselle selon l'une des revendications 6 à 8, caractérisé en ce que de la chaleur d'absorption générée dans le dispositif de séchage (22) lors de l'extraction de l'humidité peut s'utiliser afin de chauffer l'air introduit dans l'espace de lavage à des fins de stérilisation.
  10. Lave-vaisselle selon l'une des revendications précédentes 6 à 9, caractérisé en ce qu'un élément chauffant (24) est prévu dans le conduit d'air (21) entre l'espace de lavage et le dispositif de séchage (22) et en ce que l'élément chauffant (24) chauffe l'air introduit dans le dispositif de séchage (22) pour l'exécution de la stérilisation.
  11. Lave-vaisselle selon la revendication 10, caractérisé en ce que dans un processus de régénération (ΔtR), de l'air chaud peut être mené à travers le dispositif de séchage (22), suite à quoi la quantité d'eau (m) emmagasinée dans le dispositif de séchage (22) peut être renvoyée sous forme de vapeur d'eau chaude dans l'espace de lavage, et en ce que l'air nécessaire au processus de régénération (ΔtR) peut être chauffé par l'élément chauffant (24).
  12. Lave-vaisselle selon la revendication 10 ou 11, caractérisé en ce que le dispositif de contrôle (25) commande l'élément chauffant (24) durant le processus de stérilisation selon une puissance réduite et/ou cadencée par rapport au processus de régénération (ΔtR).
  13. Procédé d'exploitation d'un lave-vaisselle selon l'une des revendications précédentes.
EP11757289.1A 2010-09-22 2011-09-13 Lave-vaisselle, en particulier lave-vaisselle ménager Active EP2618712B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11757289T PL2618712T3 (pl) 2010-09-22 2011-09-13 Zmywarka do naczyń, w szczególności zmywarka do naczyń gospodarstwa domowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010041215A DE102010041215A1 (de) 2010-09-22 2010-09-22 Geschirrspülmaschine, insbesondere Haushaltsgeschirrspülmaschine
PCT/EP2011/065829 WO2012038301A2 (fr) 2010-09-22 2011-09-13 Lave-vaisselle, en particulier lave-vaisselle ménager

Publications (2)

Publication Number Publication Date
EP2618712A2 EP2618712A2 (fr) 2013-07-31
EP2618712B1 true EP2618712B1 (fr) 2019-09-11

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Application Number Title Priority Date Filing Date
EP11757289.1A Active EP2618712B1 (fr) 2010-09-22 2011-09-13 Lave-vaisselle, en particulier lave-vaisselle ménager

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EP (1) EP2618712B1 (fr)
DE (1) DE102010041215A1 (fr)
PL (1) PL2618712T3 (fr)
WO (1) WO2012038301A2 (fr)

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Publication number Priority date Publication date Assignee Title
CN104433990B (zh) * 2014-12-09 2017-04-19 苏州弗乐卡电器科技发展有限公司 一种多功能洗碗柜
CN115104984A (zh) * 2021-03-22 2022-09-27 青岛海尔洗碗机有限公司 用洗碗机清洗油烟机网状部件的方法

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
DE3632820A1 (de) * 1986-09-26 1988-04-07 Hans Baltes Verfahren zum trocknen und sterilisieren von gut im geschlossenen kreislaufsystem
JP3862549B2 (ja) * 2001-11-08 2006-12-27 シャープ株式会社 乾燥洗濯機
US8601716B2 (en) * 2003-07-30 2013-12-10 Bsh Bosch Und Siemens Hausgeraete Gmbh Method for operating a device with at least one partial programme step of drying
US20090110594A1 (en) 2005-08-19 2009-04-30 Dong Hoon Shin Dish washer with uv sterilization device therein

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
PL2618712T3 (pl) 2020-03-31
DE102010041215A1 (de) 2012-03-22
WO2012038301A3 (fr) 2012-07-19
EP2618712A2 (fr) 2013-07-31
WO2012038301A2 (fr) 2012-03-29

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