WO2007146656A1 - Lave-vaisselle industriel sous la forme d'un lave-vaisselle commandé par programme - Google Patents

Lave-vaisselle industriel sous la forme d'un lave-vaisselle commandé par programme Download PDF

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Publication number
WO2007146656A1
WO2007146656A1 PCT/US2007/070371 US2007070371W WO2007146656A1 WO 2007146656 A1 WO2007146656 A1 WO 2007146656A1 US 2007070371 W US2007070371 W US 2007070371W WO 2007146656 A1 WO2007146656 A1 WO 2007146656A1
Authority
WO
WIPO (PCT)
Prior art keywords
washing
coarse
commercial dishwasher
away
seconds
Prior art date
Application number
PCT/US2007/070371
Other languages
English (en)
Inventor
Udo Burkle
Original Assignee
Premark Feg L.L.C.
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
Application filed by Premark Feg L.L.C. filed Critical Premark Feg L.L.C.
Publication of WO2007146656A1 publication Critical patent/WO2007146656A1/fr

Links

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
    • A47L15/0031—Water discharge 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0078—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits
    • 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
    • A47L15/4202—Water filter means or strainers
    • 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0081—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with vertical sliding closing doors, e.g. hood-type dishwashers
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/09—Water level
    • 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
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the invention relates to a commercial dishwasher in the form of a program-controlled dishwasher, and to a method for operating it.
  • Such commercial dishwashers are, in particular, hood-type dishwashers and under-counter dishwashers.
  • the invention is based on the following considerations and findings by the inventor.
  • Washing water swirls around coarse particles of dirt which remain in the screening basket and in the shaft during the washing phase, and thus washes them out. As a result, suspended matter detaches itself from the coarse dirt. This detached suspended matter passes into the washing tank and contaminates the washing water again.
  • the object of the invention is to improve efficiency for cleaning items in commercial dishwashers.
  • the invention covers both a commercial dishwasher and a method for carrying out individual, two or more, or all of the functions of such a commercial dishwasher.
  • the washing liquid is contaminated to a lesser extent on account of a large amount of dirt being removed during an initial step of the washing phase. Contamination of the washing liquid with particles of dirt is reduced; this also extends the period of time for which the washing liquid can be used before it has to be renewed. Furthermore, a greater amount of suspended matter is removed from the washing liquid by means of the invention than in the prior art.
  • Fig. 1 shows a schematic vertical section through a commercial dishwasher according to the invention in the form of a program-controlled dishwasher with a closed discharge valve
  • Fig. 2 shows a schematic vertical section through the commercial dishwasher from fig. 1 with the discharge valve open
  • Fig. 3 shows a schematic vertical section through the commercial dishwasher from fig. 1 during an intermdiate pumping away step.
  • the commercial dishwasher according to the invention is a program-controlled dishwasher and may, for example, be a hood-type dishwasher or an under-counter dishwasher.
  • the commercial dishwasher contains a washing tank 2 beneath a washing chamber 4, and a washing-liquid line system 6 with a washing pump 8 for conveying washing liquid from the interior 10 of the washing tank 2 into the washing chamber 4 through at least one spray arm 12, called a washing arm 12 in the text which follows, during a washing phase.
  • At least one upper washing arm 12-1 is preferably arranged in the upper part of the washing chamber 4 above an item to be cleaned and/or at least one lower washing arm 12-2 is preferably arranged in the lower part of the washing chamber 4 below the item to be cleaned.
  • the washing arms 12 (12-1, 12-2) may be arranged such that they are stationary, can rotate and/or can be moved in a linear direction.
  • a cleaner inlet 14 is used to introduce cleaner 16 (schematically illustrated by arrows) into the washing chamber 4.
  • a final rinse-liquid line system 18 is used to supply final rinse liquid from a fresh-water connection 20 to at least one spray arm 22, called final rinse arm 22 in the text which follows, and from here into the washing chamber 4 and onto the item to be washed which is located in said chamber.
  • At least one upper final rinse arm 22-1 and/or one lower final rinse arm 22-2 are/is preferably provided in the rinse chamber 4 above and/or below the item to be cleaned.
  • the final rinse arms 22-1 and 22-2 may be arranged such that they are stationary or linear and/or can rotate.
  • a first fine-mesh screen 24 is located above the washing tank 2 and separates the interior 10 of the washing tank from the washing chamber 4. Liquid (washing liquid or final rinse liquid) which is sprayed in the washing chamber 4 flows into the interior 10 of the washing tank through the first fine-mesh screen 24 on account of the force of gravity.
  • a coarse-particle collection apparatus 26 has a coarse-particle inlet opening 28 adjacent to the first fine-mesh screen 24, preferably in a recess 30 in the center of the first fine-mesh screen 24, and extends downward to a coarse-particle sump 32 for holding coarse particles (coarse particles of dirt) which fall into the coarse-particle inlet opening 28 from the washing tank 4 or which are washed into the coarse-particle inlet opening 28 by washing liquid irrespective of the first fine-mesh screen 24, and then sink into the coarse-particle sump 32 on account of the force of gravity or, as will be described further below, are pumped away into a discharge line 36 by means of a discharge pump 34 which is connected to the coarse-particle sump 32.
  • the coarse-mesh screen 38 may be a screening basket or part of a screening basket, in which large particles of dirt are captured.
  • the coarse-mesh screen 38 is preferably at least partially a circumferential wall of a screening basket which has a closed basket base 40.
  • the coarse-particle collection apparatus 26 preferably has a shaft or passageway 42 which extends downward to the coarse-particle sump 32 from the edge of the coarse-particle inlet opening 28, that is to say from the edge of the recess 30 of the first fine-mesh screen 24.
  • the shaft wall 44 of the shaft 42 is preferably at least partially formed by a second fine- mesh screen 46 or is provided with a second fine-mesh screen 46, through which liquid can be exchanged between the shaft 42 and the interior 10 of the washing tank.
  • the second fine-mesh screen 46 is preferably located at the upper end of the shaft 42 and surrounds the coarse-mesh screen 38 at a radial distance.
  • a tank sump 48 is connected to the coarse-particle sump 32 via a discharge valve 50.
  • the two sumps 32 and 48 may be at the same level or may be at different levels.
  • the coarse- particle sump 32 is preferably located below the tank sump 48.
  • the washing tank 2 has a washing-liquid outlet 52, and the intake side of the washing pump 8 is connected to said washing-liquid outlet.
  • the washing-liquid outlet 52 is preferably located level with the washing-tank sump 48, but it could also be arranged higher.
  • a final rinse pump 53 is preferably located between the fresh-water connection 20 and the final rinse-liquid line system 18. According to another embodiment, the final rinse pump 53 can be dispensed with if the water pressure in the line of the local network is sufficiently high and constant.
  • the dishwasher When the dishwasher is filled for the first time, fresh water is sprayed from the fresh-water connection 20 into the washing chamber 4 through the final rinse-liquid line system 18 via the final rinse arms 22, and the washing tank 2 is thereby filled approximately up to the level of the first fine-mesh screen 24 (or somewhat above or below this).
  • the discharge valve 50 is closed in accordance with fig. 1 and the discharge pump 34, and preferably the washing pump 8 too, are switched off.
  • the final rinse pump 53 is switched on. Cleaner 16 for washing the item to be washed can be added to the fresh water via the cleaner input 14.
  • the program-control device 54 contains at least one washing program for controlling a program cycle.
  • a program cycle comprises at least one washing phase and at least one final rinse phase.
  • a washing phase initially takes place in which, in accordance with fig. 1, the discharge valve 50 is closed and the discharge pump 34 and the final rinse pump 53 are switched off, but the washing pump 8 is switched on.
  • the liquid level in the washing tank 2 drops to some degree on account of the washing-liquid line system 6 and the washing pump 8 being filled.
  • the flows of water in the washing tank 2 are indicated in fig. 1 by arrows 56, 58 and 60.
  • a final pumping-away step is executed.
  • the discharge valve 50 is opened and washing water is pumped away from the interior 10 of the tank and from the shaft 42 by the discharge pump 34, which is switched on, in accordance with fig. 2.
  • the washing pump 8 is switched off during this final pumping-away operation of the washing liquid after the end of the washing phase.
  • the discharge valve 50 preferably operates in the manner of a non-return valve in such a way that it is closed by the suction force of the washing pump 8 when said washing pump is switched on, irrespective of whether the discharge pump 34 is switched on or switched off.
  • the discharge valve 50 may be a valve which is controlled by the program-control device 54.
  • a user interface (not shown) may be provided in connection with the program-control device.
  • the final rinse phase begins after the final pumping-away step of the washing liquid by means of the discharge pump 34.
  • the washing pump 8 and the discharge pump 34 are switched off during the final rinse phase.
  • Final rinse liquid which may be pure fresh water from the fresh-water connection 20 or fresh water which is mixed with a final rinse aid 66, is sprayed onto the item being washed (not shown) which is located in the washing chamber 4 by the final rinse pump 53, which is switched on, (or by the fresh- water line pressure) through the final rinse-liquid line system 18 in said washing chamber.
  • the rinse aid 66 may be added to the fresh water on the intake side 68 or on the delivery side 70 of the final rinse pump 53.
  • the screen openings in the coarse-mesh screen 38 are larger than the screen openings in the first fine-mesh screen 24 and also larger than the screen openings in the second fine-mesh screen 46.
  • the screen openings in the second fine-mesh screen 46 are preferably the same size or more preferably smaller than the screen openings in the first fine-mesh screen 24.
  • the screen openings in the coarse-mesh screen 38 have, for example, a hole diameter of between 6 and 8 mm, preferably 7 mm;
  • the screen openings in the first fine-mesh screen have, for example, a hole diameter of between 2.0 and 3.0 mm, preferably 2.5 mm;
  • the screen openings in the second fine-mesh screen 46 preferably have a hole diameter of between 0.8 and 1.5 mm, preferably 1.1 mm.
  • the height and the diameter of the shaft 42 depend on the size of the dishwasher.
  • the height may be between 150 mm and 300 mm and the diameter may be between 20 mm and 40 mm.
  • the coarse-mesh screen 38 which is in the form of a circumferential wall of a basket has an inside diameter of between 100 and 150 mm, for example.
  • the washing tank 2 has an inside diameter of between 250 and 400 mm, for example.
  • the invention is not restricted to the dimensions or geometric shapes specified in this patent application. All dimensions and geometric shapes depend on the capacity of the dishwasher and its intended use, for example on its use for cleaning pots and pans, crockery and/or drinking glasses.
  • a level sensor 74 is preferably provided for detecting a predefined minimum liquid level in the washing tank, with the level sensor 74 being connected to the program-control device 54, and with the program-control device being designed to automatically terminate a final pumping-away step when the liquid level in the washing tank falls to or below the predetermined minimum liquid level.
  • Fig. 3 shows the dishwasher of the invention during an intermediate pumping-away step.
  • the program-control device 54 of the dishwasher according to the invention is designed in such a way that an intermediate pumping-away step is automatically executed after a brief initial run time of the washing phase, during which intermediate pumping-away step washing liquid and particles of dirt are pumped away from the coarse-particle sump 32 into the discharge line 36 by means of the discharge pump 34.
  • the washing pump 8 remains switched on during the intermediate pumping-away step, so that the recirculation of washing liquid from the washing tank 2 to the washing arms 12-1 and 12-2 is not interrupted.
  • the discharge valve 50 preferably also remains closed, so that no washing liquid can be pumped away directly from the washing tank 2 by the discharge pump 34.
  • the duration of the intermediate pumping-away operation during the intermediate pumping-away step is shorter than the total run time of the washing phase, preferably shorter than half the washing phase or even more preferably shorter than a quarter of the washing phase.
  • the duration may be set in a variable fashion (e.g., via the user interface associated with the program-control device 54).
  • two or more automatic intermediate pumping-away steps are provided which are successively executed at short time intervals.
  • the sum total of the individual durations of the intermediate pumping-away processes is shorter than the entire washing phase, preferably shorter than half the washing phase or even more preferably shorter than a quarter of the washing phase.
  • washing tank 2 always contains enough to ensure the necessary recirculation by means of the washing pump 8.
  • the dishwasher is advantageously designed in such a way that it automatically starts the at least one intermediate pumping-away step after a delay in the range of between 1 second and 20 seconds, preferably between 2 seconds and 16 seconds, preferably between 3 seconds and 12 seconds, or preferably between 4 seconds and 8 seconds, after the washing cycle is started.
  • the delay can preferably be set in a variable fashion (e.g., via the user interface associated with the program-control device).
  • the automatic intermediate pumping-away operation during at least one intermediate pumping-away step preferably lasts for between 1 second and 10 seconds, or preferably between 2 seconds and 8 seconds, or preferably between 3 seconds and 6 seconds, or preferably between 3 seconds and 5 seconds.
  • the duration of the intermediate pumping- away step can be set in a variable fashion.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

La présente invention concerne un lave-vaisselle industriel sous la forme d'un lave-vaisselle commandé par programme ainsi que la méthode pour le faire marcher par laquelle le liquide de lavage et les particules de saleté sont soumis à une opération d'expulsion intermédiaire au cours d'une étape d'expulsion intermédiaire au début de la phase de lavage.
PCT/US2007/070371 2006-06-09 2007-06-05 Lave-vaisselle industriel sous la forme d'un lave-vaisselle commandé par programme WO2007146656A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006026817A DE102006026817A1 (de) 2006-06-09 2006-06-09 Gewerbliche Geschirrspülmaschine in Form eines Programmautomaten
DE102006026817.2 2006-06-09

Publications (1)

Publication Number Publication Date
WO2007146656A1 true WO2007146656A1 (fr) 2007-12-21

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ID=38616548

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/070371 WO2007146656A1 (fr) 2006-06-09 2007-06-05 Lave-vaisselle industriel sous la forme d'un lave-vaisselle commandé par programme

Country Status (2)

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DE (2) DE202006020580U1 (fr)
WO (1) WO2007146656A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012087554A1 (fr) * 2010-12-21 2012-06-28 Premark Feg L.L.C. Lave-vaisselle possédant une évacuation de saleté automatique
EP2263512B1 (fr) 2009-06-17 2015-06-17 Bonferraro S.p.A. Lave-vaisselle industriel de type à cloche doté d'un ensemble filtre amélioré
WO2016196052A1 (fr) * 2015-06-01 2016-12-08 Illinois Tool Works Inc. Machine de lavage d'articles avec une retenue contrôlée de liquide en suspension
WO2019049007A3 (fr) * 2017-09-08 2019-05-02 BSH Hausgeräte GmbH Moyen pour empêcher l'encrassement d'un condenseur à plaques d'un lave-vaisselle ménager

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009048810B4 (de) * 2009-10-08 2015-08-13 Premark Feg L.L.C. Spülmaschine mit Schmutzaustragsystem
US9943210B2 (en) 2014-05-13 2018-04-17 Illinois Tool Works Inc. Warewasher with automated scrapping system
CN108714015B (zh) * 2018-06-11 2021-01-12 广州普华灵动机器人技术有限公司 洗碗机及其喷淋装置
DE102019126876A1 (de) * 2019-10-07 2021-04-08 Illinois Tool Works Inc. Spülmaschine mit schmutzaustragsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0842632A2 (fr) * 1996-11-19 1998-05-20 Whirlpool Corporation Système de filtration à purge automatique pour machine à laver la vaisselle
US5762080A (en) * 1997-01-24 1998-06-09 White Consolidated Industries, Inc. Dishwasher cycle pulsing pump out of collection chamber
WO2005058122A1 (fr) * 2003-12-16 2005-06-30 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle ayant un mode a pompe intermediaire
DE102004004104A1 (de) * 2003-12-23 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit alternierendem Pumpenbetrieb

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US3807419A (en) * 1972-05-12 1974-04-30 Gen Electric Dishwasher having means for collecting and removing food soil
DE8110571U1 (de) * 1981-04-07 1981-09-10 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Vorrichtung zum zurueckhalten fester fremdkoerper vor der ansaugoeffnung einer entleerungspumpe
SE457596B (sv) 1986-01-31 1989-01-16 Electrolux Ab Anordning vid en diskmaskin
IT211726Z2 (it) 1987-04-08 1989-04-07 Zanussi Elettrodomestici Macchina lavastoviglie con filtro di ricircolo atupoulente.
DE3842640C2 (de) 1988-12-18 1996-07-18 Hobart Corp N D Ges Des Staate Geschirrspülmaschine
DE19906791A1 (de) * 1999-02-18 2000-08-24 Miele & Cie Programmgesteuerte Geschirrspülmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0842632A2 (fr) * 1996-11-19 1998-05-20 Whirlpool Corporation Système de filtration à purge automatique pour machine à laver la vaisselle
US5762080A (en) * 1997-01-24 1998-06-09 White Consolidated Industries, Inc. Dishwasher cycle pulsing pump out of collection chamber
WO2005058122A1 (fr) * 2003-12-16 2005-06-30 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle ayant un mode a pompe intermediaire
DE102004004104A1 (de) * 2003-12-23 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit alternierendem Pumpenbetrieb

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2263512B1 (fr) 2009-06-17 2015-06-17 Bonferraro S.p.A. Lave-vaisselle industriel de type à cloche doté d'un ensemble filtre amélioré
WO2012087554A1 (fr) * 2010-12-21 2012-06-28 Premark Feg L.L.C. Lave-vaisselle possédant une évacuation de saleté automatique
CN103415238A (zh) * 2010-12-21 2013-11-27 浦瑞玛柯Feg有限责任公司 具有自动污物排放功能的洗涤机
CN103415238B (zh) * 2010-12-21 2016-11-09 浦瑞玛柯Feg有限责任公司 具有自动污物排放功能的洗涤机及从该洗涤机排出污物的方法
WO2016196052A1 (fr) * 2015-06-01 2016-12-08 Illinois Tool Works Inc. Machine de lavage d'articles avec une retenue contrôlée de liquide en suspension
WO2019049007A3 (fr) * 2017-09-08 2019-05-02 BSH Hausgeräte GmbH Moyen pour empêcher l'encrassement d'un condenseur à plaques d'un lave-vaisselle ménager
CN111050621A (zh) * 2017-09-08 2020-04-21 Bsh家用电器有限公司 用于防止家用洗碗机的板式冷凝器堵塞的机构
US11548040B2 (en) 2017-09-08 2023-01-10 BSH Hausgeräte GmbH Means for preventing the clogging of a plate condenser of a domestic dishwasher
CN111050621B (zh) * 2017-09-08 2023-03-21 Bsh家用电器有限公司 用于防止家用洗碗机的板式冷凝器堵塞的机构

Also Published As

Publication number Publication date
DE102006026817A1 (de) 2008-01-03
DE202006020580U1 (de) 2009-01-22

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