EP2756789A2 - Verfahren zum Spülen von Geschirr - Google Patents

Verfahren zum Spülen von Geschirr Download PDF

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Publication number
EP2756789A2
EP2756789A2 EP14156731.3A EP14156731A EP2756789A2 EP 2756789 A2 EP2756789 A2 EP 2756789A2 EP 14156731 A EP14156731 A EP 14156731A EP 2756789 A2 EP2756789 A2 EP 2756789A2
Authority
EP
European Patent Office
Prior art keywords
washing
washing liquid
compartment
dishes
sub
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.)
Granted
Application number
EP14156731.3A
Other languages
English (en)
French (fr)
Other versions
EP2756789A3 (de
EP2756789B1 (de
Inventor
Domenico Marini
Silvia Barus
Gianluca Benedetto
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co SpA
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.)
Filing date
Publication date
Priority claimed from IT000095A external-priority patent/ITPR20120095A1/it
Priority claimed from IT000096A external-priority patent/ITPR20120096A1/it
Application filed by Indesit Co SpA filed Critical Indesit Co SpA
Publication of EP2756789A2 publication Critical patent/EP2756789A2/de
Publication of EP2756789A3 publication Critical patent/EP2756789A3/de
Application granted granted Critical
Publication of EP2756789B1 publication Critical patent/EP2756789B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L15/0018—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
    • A47L15/0026—Rinsing 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
    • A47L15/0018—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
    • A47L15/0028—Washing 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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • A47L15/0005—Rinsing phases, e.g. pre-rinsing, intermediate rinsing, final rinsing
    • 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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • A47L15/0007—Washing 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0044—Operation time reduction
    • 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
    • A47L15/50—Racks ; Baskets
    • 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
    • A47L2301/00—Manual input in controlling methods of washing or rinsing machines for crockery or tableware, i.e. information entered by a user
    • A47L2301/08—Other manual input
    • 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
    • A47L2501/03—Water recirculation, e.g. control of distributing valves for redirection of water flow
    • 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
    • A47L2501/06—Water 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
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump

Definitions

  • the subject of the present invention is a method of washing dishes by means of a dishwasher.
  • a dishwasher comprising a plurality of racks positioned one above another and located in a washing compartment.
  • the user In order to perform the washing of the dishes the user arranges them by distributing them over the various racks. During washing the liquid on the bottom of the washing compartment is taken by a pump and made to travel through two rotating sprayers equipped with holes which direct the jets of water towards the dishes.
  • An object of the present invention is to make available to a user the possibility of carrying out specific washing cycles so as to permit better flexibility of use.
  • Figures 1-4 show examples of washing cycles according to the present invention and show a qualitative pattern of temperature as a function of time (expressed in minutes and shown on the horizontal axis).
  • the subject of the present invention is a method of washing dishes by means of a dishwasher.
  • This dishwasher comprises a plurality of racks positioned in a washing compartment. These racks are designed to support the dishes during washing.
  • the dishwasher comprises a first and a second rack, the second rack being situated above the first rack.
  • the first rack is the lowest rack of the dishwasher.
  • the second rack is typically the second rack from the bottom.
  • the dishwasher also comprises a first and a second sprayer. The first sprayer is positioned below the first rack.
  • the second sprayer is positioned between the first and the second rack.
  • the method provides for the dishwasher selecting the washing parameters according to at least:
  • the method furthermore provides for performing the washing.
  • Selecting said second input makes the cycle identified by the first input more intensive or faster or more economical (in terms of washing liquid and energy consumption).
  • the cycle becomes faster or more economical or more intensive depending on the type of cycle selected with the first input.
  • the dishes to be washed are positioned on a specific rack selected through the second input.
  • the cycle will be reparametrized to allow optimum washing of the dishes in the selected rack.
  • the dishwasher will concentrate its resources on carrying out the washing of the dishes placed in the selected rack, neglecting the wash, however, in other areas of the washing compartment.
  • the second input preferably makes it possible to select one rack at a time.
  • the second input therefore makes it possible to select one washing area inside the washing compartment.
  • the step of performing the wash therefore provides for performing a wash wherein the dishes are positioned on only one of the racks of the dishwasher.
  • the first input can be selected from a predetermined list of washing cycles.
  • This predetermined list can comprise one or more of the following cycles: fast cycle (in which speed of execution of the cycles is privileged), intensive cycle (which will have a longer duration than the fast cycle and which constitutes a vigorous cycle to optimise the cleaning of the dishes), and normal cycle (a cycle which allows a compromise between the two indicated above).
  • the intensive cycle is the most vigorous selectable among those selectable in the predetermined list.
  • the first input can be selectable using a first dedicated selector (for example a knob or keys).
  • a first dedicated selector for example a knob or keys.
  • said introduction of said second input causes: an increase in the maximum temperature reached by the washing liquid and/or a lengthening of the washing cycle time and/or an increase in particular steps or sub-steps of the dispensing pressure to the sprayers (even in this case the variations are to be considered as referring to a similar cycle without the second input being specified).
  • the step of performing the wash comprises in turn a plurality of steps.
  • a first step (indicated by the reference number 11 in figure 1 ) provides for performing a pre-wash comprising the sub-steps of:
  • the step of performing the pre-wash is carried out without performing a heating of the washing liquid; opportunely the pre-wash is carried out without the use of detergents in the washing liquid; opportunely during the pre-wash the duration of the step of spraying the dishes is comprised between 9 and 12 minutes.
  • a second step provides for performing a removal of dirt from the dishes. This comprises the sub-steps of:
  • a third step provides for performing a first rinse of the dishes (see reference 13); opportunely this step provides for the use of network water, opportunely the network water used during the first rinse is not heated by the use of a heating element located in the washing compartment (as it enters the compartment which is still hot, it does however undergo heating nevertheless).
  • a fourth step provides for performing a second heating of the dishes (see reference 14) comprising the steps of:
  • the cycle of figure 1 is particularly effective when it is necessary to wash only a few dishes. In this way, without having to wait for the full load, it is possible to wash the cutlery and plates used for cooking for rapid reuse, avoiding the formation of bad odours.
  • the dishes are sprayed for over 75% of the time by the first sprayer.
  • the second sprayer is used only sporadically to dissolve the detergent better in the dispenser and to assist the washing of any cutlery positioned vertically in the first rack.
  • spraying is carried out for most of the time by the second sprayer, possibly alternating with the third sprayer (which as described above is located above the second rack). The first sprayer is not used.
  • spraying is carried out by alternating between the second and the third sprayer.
  • the first sprayer is not used.
  • the step of performing the wash comprises a plurality of steps as described below.
  • a first step provides for removing the dirt from the dishes and this first step comprises the sub-steps of:
  • a second step provides for rinsing the dishes and in turn comprises the sub-steps of:
  • the cycle of figure 2 allows a significant time saving when it is necessary to wash only a few dishes. In this way, without having to wait for the full load, it is possible to wash the cutlery and plates used for cooking for rapid reuse, avoiding the formation of bad odours.
  • the cycle of figure 3 is performed when the intensive cycle indicated above is selected as first input and the lower rack or the third rack (always assuming it is present) is selected as second input.
  • the cycle of figure 4 is performed when the intensive cycle indicated above is selected as first input and the second rack from the bottom of the dishwasher is selected as second input.
  • the selection of said second input causes a lengthening of the intensive cycle comprised between 10% and 50%.
  • the selection of said second input causes furthermore an increase in the maximum temperature of the washing cycle (preferably this increase is comprised between 3 °C and 7 °C).
  • This increase is comprised between 3 °C and 7 °C.
  • the step of performing the wash comprises a plurality of steps described below.
  • a first step provides for removing the dirt from the dishes and this first step comprises the sub-steps of:
  • a second step provides for performing a first rinse of the dishes comprising the steps of:
  • a third step provides for carrying out a second rinse of the dishes and in turn comprises the steps of:
  • step of removing the dirt from the dishes is preceded at least by the step of performing a pre-wash (see reference 36) in turn comprising:
  • the step of performing the first rinse provides for heating the washing liquid placed in the compartment until the sensor detects a predetermined target temperature greater than or equal to 60 °C (see reference 32b).
  • this heating is followed by a maintenance of the temperature of the washing liquid in a first predetermined range containing the predetermined target temperature (see reference 32d); opportunely said temperature maintenance has a duration comprised between 4 and 6 minutes.
  • the step of performing the second rinse provides for heating a washing liquid placed in the compartment at least until a sensor detects a predetermined target temperature comprised between 65 °C and 75 °C (see reference 33d).
  • this heating is followed by a maintenance of the temperature of the washing liquid in a predetermined range containing the predetermined target temperature (see reference 33e); opportunely said temperature maintenance has a duration of less than 1 minute; preferably it is about 30 seconds.
  • the dishes are sprayed for over 75% of the time (preferably for 100%) by the first sprayer.
  • the second sprayer is not used.
  • spraying is carried out for most of the time by the second sprayer, possibly alternating with the third sprayer (which as described above is located above the second rack).
  • the first sprayer is not used.
  • spraying is carried out by performing an alternation between the second and the third sprayer.
  • the first sprayer is not used.
  • the present invention enables many advantages to be achieved.
  • a subject of the present invention is a method of removing dirt from dishes placed on a first rack of a dishwasher.
  • the first rack inside a washing compartment is located above a lower rack of the dishwasher.
  • Dishwashers are in fact known comprising a plurality of racks: for example, besides the lower rack and the first rack there could also be an upper rack located above the first rack.
  • the dishwasher comprises:
  • the dishwasher can comprise a sprinkler for spraying the washing compartment, which is located above the first rack (and usually also the upper rack).
  • the method envisages that the dishwasher should implement a programme of dirt removal comprising the step of carrying out a wash (see reference 31) of the dishes.
  • the step of carrying out said wash comprises the sub-step of:
  • said first target temperature is greater than or equal to 45 °C; Opportunely performing the first heating has a duration greater than or equal to 13 minutes.
  • the first maintenance (see reference 31c) has a duration greater than or equal to 10 minutes.
  • said second target temperature is greater than or equal to 55 °C.
  • the second heating has a duration greater than or equal to 5 minutes.
  • the second maintenance (see reference 31e) has a duration greater than or equal to 12 minutes.
  • said third target temperature is greater than or equal to 70 °C.
  • the third heating has a duration greater than or equal to 7 minutes.
  • the third maintenance (see reference 31g) has a duration greater than or equal to 22 minutes.
  • the programme for removing dirt from the dishes comprises the step of performing a pre-wash.
  • the pre-wash precedes said wash and in turn comprises the sub-steps of:
  • Performing a pre-wash with a heated washing liquid is in fact very important for the dishes placed on the first rack.
  • the Applicant has verified that typically there are dishes placed on the first rack such a breakfast cups with residues of milk or coffee, or glasses with lipstick residues etc.
  • it is very important to be able to carry out a hot pre-wash immediately, a cold pre-wash however proving ineffective and indeed counterproductive.
  • the method comprises furthermore the step of performing a first rinse of the dishes (see reference 32), in turn comprising the sub-steps of:
  • the method comprises furthermore the step of performing a second heating of the dishes (see reference 33) comprising the sub-steps of:
  • the step of performing the first and/or the second rinse is subsequent to the step of performing said wash.
  • the step of performing the first rinse provides for heating the washing liquid placed in the compartment until the sensor detects a target temperature greater than or equal to 60 °C (see reference 32b); Possibly this heating is followed by a maintenance of the temperature of the washing liquid in a first predetermined range containing the target temperature (see reference 32d); opportunely said temperature maintenance has a duration comprised between 4 and 6 minutes.
  • the spraying of the dishes during the first rinse is at least in part simultaneous with the heating and/or temperature maintenance of the washing liquid.
  • the step of performing the second rinse provides for heating the washing liquid placed in the compartment until a sensor detects a target temperature comprised between 65 °C and 75 °C (see reference 33d). Possibly this heating is followed by a maintenance of the temperature of the washing liquid in a predetermined range containing the target temperature (see reference 33e); opportunely said temperature maintenance has a duration of less than 1 minute, preferably being about 30 seconds.
  • the spraying of the dishes during the second rinse is at least in part simultaneous with the heating and/or temperature maintenance of the washing liquid.
  • the sub-step of spraying the dishes during said pre-wash and during said wash is performed for at least 75% of the time by means of the sprayer interposed between the first rack and the lower rack.
  • the sub-step of spraying the dishes during said washing is performed by alternating the spraying of the liquid by the first sprayer and by the sprinkler located above the first rack. In this way the dishes are successfully hit both from below and from above, thus improving the washing action.
  • the method comprises furthermore a step of selecting the parameters of said programme of dirt removal, said step of selection providing at least for:
  • the dishes inside the washing compartment are in fact placed only on said first rack.
  • the dishes to be washed are in fact positioned on a specific rack selected through the second input.
  • the standard cleaning programme selected through the first input will be reparametrized to allow an optimal cleaning programme for the dishes in the selected rack (in the case of the cleaning programme of the present invention, this means the first rack).
  • the dishwasher will concentrate its resources on carrying out the cleaning of the dishes placed in the selected rack, neglecting however the washing in other areas of the washing compartment.
  • the discrete list from which the first input is selectable can comprise for example one or more of the following cycles: fast cycle (in which speed of execution of the cycle is privileged), intensive cycle (which will have a longer duration than the fast cycle and which constitutes a vigorous cycle to optimise the cleaning of the dishes), and normal cycle (a cycle which allows a compromise between the two indicated above).
  • the intensive cycle is the most vigorous program among those selectable in said list.
  • the first input can be selectable using a first dedicated selector (for example a knob or keys).
  • the selection of said second input causes a lengthening of the intensive cycle comprised between 10% and 50%.
  • the selection of said second input causes furthermore an increase in the maximum temperature of the washing cycle (preferably this increase is comprised between 3 °C and 7 °C).
  • the cleaning programme for the dishes of figure 4 makes it possible to obtain a vigorous treatment to eliminate with maximum efficacy even the incrustations which are hardest to defeat, such as dirt nestling in pans and certain cutlery, without carrying out a hand prewash.
  • the present invention enables many advantages to be achieved. In the first place it makes it possible to concentrate the washing action on a specific rack, and this makes it possible to obtain an action aimed at the dirt, reducing time wasting.
  • An object of the present invention is to make available to a user the possibility of performing a specific wash cycle so as to permit a more effective washing action for dishes placed in predetermined areas of the washing compartment.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP14156731.3A 2012-12-28 2014-02-26 Verfahren zum Spülen von Geschirr Not-in-force EP2756789B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000095A ITPR20120095A1 (it) 2012-12-28 2012-12-28 Metodo di lavaggio di stoviglie
IT000096A ITPR20120096A1 (it) 2012-12-28 2012-12-28 Metodo di rimozione dello sporco da stoviglie

Publications (3)

Publication Number Publication Date
EP2756789A2 true EP2756789A2 (de) 2014-07-23
EP2756789A3 EP2756789A3 (de) 2016-01-06
EP2756789B1 EP2756789B1 (de) 2018-04-04

Family

ID=49767056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14156731.3A Not-in-force EP2756789B1 (de) 2012-12-28 2014-02-26 Verfahren zum Spülen von Geschirr

Country Status (1)

Country Link
EP (1) EP2756789B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106937848A (zh) * 2016-01-05 2017-07-11 Lg电子株式会社 洗碟机及其控制方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4108150B1 (de) * 2021-06-22 2024-10-16 The Procter & Gamble Company Verfahren zur behandlung von geschirr in einer haushaltsgeschirrspülmaschine

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Publication number Priority date Publication date Assignee Title
DE3816408A1 (de) * 1988-05-13 1989-11-16 Licentia Gmbh Geschirrspuelmaschine mit einer umsteuervorrichtung
DE19651347C2 (de) * 1996-12-10 2002-11-14 Bsh Bosch Siemens Hausgeraete Verfahren zum Betreiben einer Geschirrspülmaschine
DE19812231A1 (de) * 1998-03-20 1999-09-23 Aeg Hausgeraete Gmbh Geschirrspülmaschine
IT1311444B1 (it) * 1999-11-16 2002-03-12 Eltek Spa Dispositivo di intercettazione del flusso di un fluido, in particolare per macchine di lavaggio di uso domestico.
IT1319915B1 (it) * 2000-02-24 2003-11-12 Merloni Elettrodomestici Spa Macchina lavastoviglie con possibilita' di lavaggio differenziato.
DE102005033345B4 (de) * 2005-07-16 2007-06-28 Electrolux Home Products Corporation N.V. Bedieneinrichtung für eine Geschirrspülmaschine
US8210191B2 (en) * 2008-12-09 2012-07-03 General Electric Company Dishwasher having multi-mode spray arm system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106937848A (zh) * 2016-01-05 2017-07-11 Lg电子株式会社 洗碟机及其控制方法
EP3189763A1 (de) * 2016-01-05 2017-07-12 Lg Electronics Inc. Geschirrspülmaschine und steuerungsverfahren dafür
AU2016385275B2 (en) * 2016-01-05 2019-01-17 Lg Electronics Inc. Dishwasher and controlling method thereof

Also Published As

Publication number Publication date
EP2756789A3 (de) 2016-01-06
EP2756789B1 (de) 2018-04-04

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