EP0852928A2 - Geschirrspülmaschine mit einem Ober- und Untersprüharm, einer Umwälzpumpe und einer Entleerungspumpe - Google Patents

Geschirrspülmaschine mit einem Ober- und Untersprüharm, einer Umwälzpumpe und einer Entleerungspumpe Download PDF

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Publication number
EP0852928A2
EP0852928A2 EP97121799A EP97121799A EP0852928A2 EP 0852928 A2 EP0852928 A2 EP 0852928A2 EP 97121799 A EP97121799 A EP 97121799A EP 97121799 A EP97121799 A EP 97121799A EP 0852928 A2 EP0852928 A2 EP 0852928A2
Authority
EP
European Patent Office
Prior art keywords
spray arm
filter
pump
bearing
dishwashing machine
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
EP97121799A
Other languages
English (en)
French (fr)
Other versions
EP0852928A3 (de
EP0852928B1 (de
Inventor
Rapke Harry Jürgen
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 Corp
Original Assignee
Whirlpool Corp
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 DE19652235A external-priority patent/DE19652235C2/de
Priority claimed from DE1996152231 external-priority patent/DE19652231C2/de
Priority claimed from DE1996152233 external-priority patent/DE19652233C2/de
Priority claimed from DE1997102982 external-priority patent/DE19702982C2/de
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Publication of EP0852928A2 publication Critical patent/EP0852928A2/de
Publication of EP0852928A3 publication Critical patent/EP0852928A3/de
Application granted granted Critical
Publication of EP0852928B1 publication Critical patent/EP0852928B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A47L15/4202—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
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays

Definitions

  • the invention relates to a dishwashing machine with lower and upper spray arm and with a circulating pump for the circulating operation of the rinse water and a wash liquor pump in the sump in the bottom of the rinsing reservoir for the removal by suction of the rinse water in suction operation.
  • the object of the invention in a dishwashing machine of the previously mentioned type, is to arrange the circulating pump and the wash liquor pump in such a way that, in the circulating operation itself, the deposited dirt particles which are in the area of the wash liquor pump are not fed again to the spray arms.
  • the object is achieved in that the sump in the bottom is covered by means of a strainer plate, and in that there is placed into the first recess in the strainer plate a coarse filter, through which, by means of the incorporated wash liquor pump, the rinse water is removed by suction and in that, in a second recess of the strainer plate, separated from the wash liquor pump by means of radial bearings, the lower spray arm is positioned with a downward opening bearing shell in a rotatable position, and in that the bearing shell of the lower spray arm is enclosed by a fine filter which is held by the radial bearing and in that the circulating pump with the pump assembly projects into the bearing shell, serving as a pump casing, of the lower spray arm.
  • the bearing shell with the outer collar is placed in a vertically adjustable position in the radial bearing which can be raised in the circulating operation by the flow of rinse water and which is used for coupling the lower spray arm to a coupling portion arranged in the lower crockery basket; then the rinse water can be directed over the lower spray arm and the coupling portion in the lower crockery basket, leak-free to the upper spray arm, especially when the coupling portion in the lower crockery basket can also be adjusted upwards in a restricted vertical direction and connects to the upper spray arm.
  • the design of the fine filter comprises a filter casing and an attached fine filter plate or similar.
  • the filter casing has an upper inlet region and a lower inlet region, and in that the fine filter plate covers the lower inlet region, and in that the bearing shell of the lower spray arm extends to within the upper inlet region and that underneath the bearing shell in the fine filter a vertically adjustable disc-shaped valve element is placed, which can be raised, in the circulating operation, by the rinse water thereby opening the lower inlet region of the filter casing while, when reversing the direction of the rotation of the pump unit, the rinse water, which is being suctioned back from the spray arms, lowers the valve element to seal the lower inlet region.
  • a bypass is opened so that sufficient rinse water can be suctioned in and fed to the spray arms.
  • the pump unit In the suction operation the pump unit is reversed at least for a short time in its direction of rotation, closing the bypass.
  • the rinse water which is suctioned back from the spray arms and the bearing shell is forced through the fine filter plate, the adhering dirt particles on its exterior surface being forced off and removed by the wash liquor pump.
  • the bottom of the sump in the region of the circulating pump is pulled up as a cylindrical dome, to the underside of which the electric motor of the circulating pump is attached and to which the cylindrical filter casing is fixed.
  • the radial bearing is constructed from two bearing shells between which an outer collar of the bearing sleeve is rotatably placed, and that the bearing shell facing the lower spray arm is adjustable in the bearing shell backer, which faces away from the lower spray arm, in a restricted vertical direction and in that the bearing shell, which faces away from the lower spray arm, is detachably fixed in the associated recess of the strainer plate, then the lower spray arm and the fine filter can be removed from the machine in a simple manner, when the lower crockery basket has been taken out.
  • the attachment of the fine filter in the strainer plate is simplified further in that the filter casing on the front-side turned towards the lower spray arm bears an outer collar; over the latter and over the bearing shell, facing away from the lower spray arm, the fine filter is held detachably in the strainer plate.
  • valve element The adjustment movement of the valve element is limited in that the valve element in the open position strikes the open lower front-side of the bearing sleeve and in that the valve element causes a seal in the lower closed position towards the bottom of the sump and towards a closed ring of the filter which divides the upper and the lower inlet region.
  • valve element can then, without impairment, be placed by the pump unit into the fine filter, so that the valve element has a central bore the diameter of which is greater than the outer diameter of the pump assembly but smaller than the outer diameter of the bearing shell.
  • a strainer plate 15 In the partial section in the bottom of the rinsing reservoir the sump 11 can be seen which is covered by means of a strainer plate 15.
  • a coarse filter 13 In a first recess of the strainer plate 15 a coarse filter 13 is placed, in which the wash liquor pump 12 is incorporated.
  • the fine filter 7 is divided into an upper inlet region 14 and a lower inlet region 16.
  • the filter casing 5 is, at the same time, shaped like a cage, so that large-surface inlet regions 14 and 16 arise which are separated from each other by a closed ring of the filter casing 5.
  • the fine filter plate 9 covers the upper inlet region 14.
  • the fine filter 7 is attached to a dome in the bottom of the sump 11. On the outside of the dome the electric motor 4 of the circulating pump 1 is attached.
  • the upper front-side of the fine filter 7 bears an outer collar 21 which is held between a lower bearing shell 17 and the filter plate 15.
  • an upper bearing shell 18 can be adjusted upwards in a vertically restricted direction.
  • an outer collar 20 of a bearing sleeve 2 of the lower spray arm 8 is placed in a rotatable position.
  • the bearing sleeve 2 is attached to the lower spray arm 8 in one piece and extends over the upper inlet region 14 of the fine filter 7. Underneath the bearing sleeve 2 in the fine filter 7 a valve element 6 is placed in a vertically adjustable position.
  • the valve element 6 is disc-shaped, turning the concave side to the lower spray arm 8.
  • the valve element 6 has a central bore, the diameter of which is bigger than the pump unit 1 which projects into the bearing sleeve 2, but smaller than the outer diameter of the bearing sleeve 2.
  • a bellows seal 22 seals the junction between the pump unit 1 and the sump 11.
  • FIG. 1 shows, rinse water is removed by suction out of the sump 11 in the circulating operation.
  • the flow of the rinse water is shown by arrows.
  • the valve element 6 is raised, at the same time, by the suctioned-in rinse water, ensuring that the outer edge of the rim of the valve element 6, which is aligned parallel to the adjustable direction, has an accurate seating, when the latter stays on the closed ring of the filter casing 5.
  • the rinse water is in part removed by suction over the fine filter plate 9 and filtered while another part is delivered unfiltered through the open bypass which is above the lower inlet region 16 into the bearing sleeve 2.
  • the lower spray arm 8 is raised so that the outlet 24 of the lower spray arm 8 is connected to the inlet opening 25 of a coupling section 3, which is arranged in the lower crockery basket 40 and creates a tight conduit for the rinse water to the upper spray arm.
  • the coupling section 3 can also itself be placed in the lower crockery basket 40 in a limited vertically adjustable position, so that it displaces vertically and is connected with its outlet opening to the entry opening of the upper spray arm which is not shown.
  • the pump assembly 1 does not require its own pump casing and causes agitation in the rinse water, the direction of rotation of which corresponds with the direction of rotation of the spray arms which are predetermined by the Segner's drive of the same.
  • the rinse water in the region of the coarse water filter 13 and the wash liquor pump is not agitated, so that a calm water region exists in which the dirt particles can settle.
  • the rinse water will then be directed out of the sump 11.
  • the circulating pump 4 can be operated for at least a short while in the reverse direction of rotation.
  • the pump unit 1 suctions the rinse water back from the spray arms and the bearing sleeve 2 as can be ascertained from Figure 2.
  • the valve element 6 is moved downwards until it touches the sump 11 and seals the lower inlet region 16.
  • the suctioned-back rinse water must pass over the fine filter plate 9 in the upper inlet region 14, pushing back the adhering dirt on the outside of the same and feeding the discharge over the coarse filter 13 and the wash liquor pump 12.
  • the lower spray arm 8 and, if necessary, the coupling section 3 are brought into their lower exit positions, so that, after the suction operation, the lower crockery basket 40 can be withdrawn from the rinsing reservoir.
  • Combinations of partial features of the dishwashing machine according to the invention can also be used with advantage in other dishwashing machines, in which the lower spray arm is not vertically adjustable or in which the circulating pump may be simultaneously operated as a wash liquor pump.
  • Such a combination of part features is characterised according to one development in that the lower spray arm is rotatably mounted by means of a bearing sleeve and bearings in a coarse filter covering the sump, and in a filter surrounding the beating sleeve, and in that the electric motor secured at the base of the sump projects with the pump unit into the bearing sleeve serving as a pump casing.
  • a further combination of part features provides that the lower spray arm is guided in a vertically restricted displaceable manner by means of a downwardly-open bearing sleeve and by means of bearings, and is rotatably mounted in a bearing shell covering a recess in a coarse filter covering the sump, and a filter surrounding the bearing sleeve, in that the circulating pump feeds the rinse water to the bearing sleeve and in that the supplied rinse water lifts the lower spray arm and connects its outlet opening with an inlet opening of a coupling section in the lower crockery basket.
  • the lower spray arm has a downwardly-open bearing sleeve, which accommodates the pump unit of the circulating pump and which is rotatably mounted in a bearing, the bearing being disposed in a recess of a coarse filter covering the sump, in that the bearing sleeve is surrounded by a filter which is subdivided into an upper inlet area with fine filter and a lower openable and closeable inlet area by means of a valve member, and in that the valve member during circulating operation releases the lower inlet area and upon a reverse direction of rotation of the pump unit during suction-out operation closes the lower inlet area of the filter.

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Washing And Drying Of Tableware (AREA)
EP97121799A 1996-12-16 1997-12-11 Geschirrspülmaschine mit einem Ober- und Untersprüharm, einer Umwälzpumpe und einer Entleerungspumpe Expired - Lifetime EP0852928B1 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE19652235A DE19652235C2 (de) 1996-12-16 1996-12-16 Geschirrspülmaschine mit unterem Sprüharm und Umwälzpumpe für das Spülwasser
DE19652233 1996-12-16
DE19652231 1996-12-16
DE19652235 1996-12-16
DE1996152231 DE19652231C2 (de) 1996-12-16 1996-12-16 Geschirrspülmaschine mit einem unteren und einem oberen Sprüharm sowie einer Umwälzpumpe für das Spülwasser
DE1996152233 DE19652233C2 (de) 1996-12-16 1996-12-16 Geschirrspülmaschine mit einem unteren und einem oberen Sprüharm sowie einer Umwälzpumpe für das Spülwasser
DE1997102982 DE19702982C2 (de) 1997-01-28 1997-01-28 Geschirrspülmaschine mit unterem und oberem Sprüharm sowie mit Umwälzpumpe und Laugenpumpe
DE19702982 1997-01-28

Publications (3)

Publication Number Publication Date
EP0852928A2 true EP0852928A2 (de) 1998-07-15
EP0852928A3 EP0852928A3 (de) 1999-01-27
EP0852928B1 EP0852928B1 (de) 2003-04-23

Family

ID=27438510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97121799A Expired - Lifetime EP0852928B1 (de) 1996-12-16 1997-12-11 Geschirrspülmaschine mit einem Ober- und Untersprüharm, einer Umwälzpumpe und einer Entleerungspumpe

Country Status (3)

Country Link
EP (1) EP0852928B1 (de)
DE (1) DE69721211T2 (de)
ES (1) ES2197289T3 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1537820A3 (de) * 2003-12-05 2008-11-19 LG Electronics Inc. Geschirrspüler
US8240321B2 (en) 2009-12-18 2012-08-14 Whirlpool Corporation Magnetic drive controlled rotation for dishwasher spray arm
US8636851B2 (en) 2004-04-21 2014-01-28 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher comprising automatically cleaning washing liquid lines
CN108634818A (zh) * 2018-07-10 2018-10-12 江门市蓬江区硕泰电器有限公司 一种洗涤机
EP3545812A1 (de) * 2018-03-27 2019-10-02 Miele & Cie. KG Geschirrspülmaschine, insbesondere haushaltsgeschirrspülmaschine
CN110859566A (zh) * 2018-08-28 2020-03-06 佛山市顺德区美的洗涤电器制造有限公司 喷臂组件及具有其的洗涤电器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB907556A (en) * 1960-01-04 1962-10-10 Waste King Corp Improvements in or relating to dishwashers
US3375835A (en) * 1965-09-23 1968-04-02 Whirlpool Co Article washing apparatus
EP0222306A1 (de) * 1985-11-13 1987-05-20 INDUSTRIE ZANUSSI S.p.A. Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter
US5211189A (en) * 1990-12-17 1993-05-18 Zanussi Elettrodomestici S.P.A. Dishwasher with removable rack

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528747B1 (de) * 1965-11-09 1970-09-24 Licentia Gmbh Pumpeinrichtung,insbesondere fuer Geschirrspuel- oder Waschmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB907556A (en) * 1960-01-04 1962-10-10 Waste King Corp Improvements in or relating to dishwashers
US3375835A (en) * 1965-09-23 1968-04-02 Whirlpool Co Article washing apparatus
EP0222306A1 (de) * 1985-11-13 1987-05-20 INDUSTRIE ZANUSSI S.p.A. Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter
US5211189A (en) * 1990-12-17 1993-05-18 Zanussi Elettrodomestici S.P.A. Dishwasher with removable rack

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1537820A3 (de) * 2003-12-05 2008-11-19 LG Electronics Inc. Geschirrspüler
US8636851B2 (en) 2004-04-21 2014-01-28 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher comprising automatically cleaning washing liquid lines
US8240321B2 (en) 2009-12-18 2012-08-14 Whirlpool Corporation Magnetic drive controlled rotation for dishwasher spray arm
EP3545812A1 (de) * 2018-03-27 2019-10-02 Miele & Cie. KG Geschirrspülmaschine, insbesondere haushaltsgeschirrspülmaschine
CN108634818A (zh) * 2018-07-10 2018-10-12 江门市蓬江区硕泰电器有限公司 一种洗涤机
CN110859566A (zh) * 2018-08-28 2020-03-06 佛山市顺德区美的洗涤电器制造有限公司 喷臂组件及具有其的洗涤电器

Also Published As

Publication number Publication date
EP0852928A3 (de) 1999-01-27
DE69721211T2 (de) 2003-12-11
DE69721211D1 (de) 2003-05-28
ES2197289T3 (es) 2004-01-01
EP0852928B1 (de) 2003-04-23

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