EP0222306B1 - Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter - Google Patents

Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter Download PDF

Info

Publication number
EP0222306B1
EP0222306B1 EP86115281A EP86115281A EP0222306B1 EP 0222306 B1 EP0222306 B1 EP 0222306B1 EP 86115281 A EP86115281 A EP 86115281A EP 86115281 A EP86115281 A EP 86115281A EP 0222306 B1 EP0222306 B1 EP 0222306B1
Authority
EP
European Patent Office
Prior art keywords
filter
water
nozzle
recirculation filter
jet
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.)
Expired - Lifetime
Application number
EP86115281A
Other languages
English (en)
French (fr)
Other versions
EP0222306A1 (de
Inventor
Claudio Milocco
Giovanni Pup
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi 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
Application filed by Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Priority to AT86115281T priority Critical patent/ATE54560T1/de
Publication of EP0222306A1 publication Critical patent/EP0222306A1/de
Application granted granted Critical
Publication of EP0222306B1 publication Critical patent/EP0222306B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A47L15/4208—Arrangements to prevent clogging of the filters, e.g. self-cleaning
    • 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
    • A47L15/4204—Flat filters

Definitions

  • the invention relates to a dishwasher as set forth in the preamble of claim 1.
  • a dishwasher of this kind is known from EP-A-0 068 974.
  • Known dishwashers usually have a water collection sump at the bottom of the washing chamber, with a water recirculation pump and a water discharge pump connected thereto.
  • the water collection sump communicates with the washing chamberthrough a fine-mesh recirculation filter of a substantially planar configuration adapted to retain particulate matter entrained by the washing water flowing from the chamber towards the collecting sump.
  • the recirculation filter is formed with an opening through which the interior of the washing chamber communicates directly with the intake of the discharge pump.
  • a large-mesh filter inserted into this opening services the main purpose of retaining large particles which might otherwise obstruct or damage the rotor of the discharge pump.
  • the dishwasher disclosed in the above-mentioned EP-A-0 068 974 fits with the afore-mentioned design.
  • the rotating arm having jet nozzles for directing watertowards the dishes to be washed, is provided with jet nozzles as well directed obliquely downwards onto the surface of the recirculation fitter for rising retained particulate matter off the recirculation filter and sweeping it into the large-mesh pump protection filter.
  • Those additional jet nozzles have a small inclination in the order to 10° to 25°, resulting in a poor efficiency of the jets ejected therefrom.
  • the vertical components of those jets tend to jam the particulate matter into the passages of the recirculation filter, with the result that the filter is progressively obstructed.
  • a dishwasher having a fine-mesh filter located at the bottom of the washing chamber above a water collecting sump.
  • the washing chamber is provided with a stationary fresh water supply located in a position so as to direct a water jet against the fine mesh filter so that a rinsing flow of water results therefrom extending over the whole surface of the filter.
  • the water jet ejected therefrom is able to uniformly extend over the whole filter surface upon rotation of the nozzle carrier arm.
  • the tangential direction of the water jet is effective to avoid that any debris on the filter surface be jammed in the filter openings.
  • the filter is automatically and effectively cleaned.
  • a dishwasher comprises a washing chamber 3 (only partially shown), the bottom of which is formed with a sump 4 for collecting the washing and rinsing water.
  • Located in sump 4 is the intake section 2 of a recirculation pump 5 for the supply of water to at least one rotating nozzle carrier arm 6 for spraying the water onto the (not shown) dishes to be washed in the known manner.
  • Filter 7 is disposed in the flow path of the water sprayed onto the dishes and flowing back into sump 4 for being recirculated by pump 5.
  • Filter 7 is formed with a frustoconical portion housing a removable large-mesh filter 8 of a suitable shape disposed in the flow path of the water from sump 4 to the intake of a discharge pump 9.
  • the water jet 11 ejected from said nozzle means 10 is directed substantially tangentially onto the surface of recirculation filter 7.
  • this effect may preferably be obtained by means of a substantially annular deflector 13 extending adjacent the periphery of filter 7, itself shaped for instance as an annular sheet member concentric with the axis of rotation of nozzle carrier arm 6.
  • nozzle carrier arm 6 has its underside formed with at least one supplementary opening 10 adapted to direct a jet 14 of water onto deflector 13 shaped to deflect the water so as to form tangential jet 11, the latter being aligned in the radial direction of filter 7.
  • jet 11 being substantially devoid of vertical components, does not cause the passages offilter7 to be obstructed by the particulate matter it entrains; quite to the contrary, the particulate matter is swept along the surface of the recirculation filter 7 substantially without hindrance and into large-mesh fitter 8 to be collected therein prior to being expelled therefrom during a subsequent water discharge cycle.
  • the invention thus attains the stated object of achieving an effective automatic cleaning of recirculation filter 7 which may advantageously be of a simple construction (for example a simple metal sheet or plastic panel), and may be formed with particularly narrow passages to result in improved filtering performance.
  • the described combination results in an improvement of the overall performance of the dishwasher by achieving effective filtering of the total volume of the recirculated water instead of filtering only part of the circulating water as in conventional embodiments.
  • the particularly narrow passages of the recirculation filter facilitate the displacement of particulate matter on the surface of the filter, thus contributing to the self-cleaning effect. It has been experimentally found that the optimum dimension of the passages of filter 7 lie between 0.2 and 0.3 millimeters.
  • deflector 13 may be omitted, jet 11 being produced by a branch pipe 12 extending downwards from nozzle carrier arm 6 and being suitably shaped into an "L" configuration, as shown in the drawing, and terminating in nozzle 10.
  • the described dishwasher may of course be subjected to various modifications and alterations within the scope of the invention.
  • the jet 11 issuing from supplementary nozzle 10 may for instance be inclined directly onto filter 7 in the known manner; in this case, however, the recirculation filter would be of substantially conical shape with its surface aligned with respect to jet 11 so that the latter impinges tangentially thereon.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Claims (4)

1. Geschirrspülmaschine mit einem Umwälzfilter (7), das eine im wesentlichen planare Oberfläche aufweist und dazu eingerichtet ist, Partikelmaterial zurückzuhalten, einem rotierenden Düsenträgerarm (6), der über der Oberfläche des Umwälzfilters (7) angeordnet ist und wenigstens eine Düse (10) aufweist, um einen Wasserstrahl (11) zum Reinigen der Oberfläche des Umwälzfilters (7) abzugeben, dadurch gekennzeichnet, daß der genannten wenigstens einen Düse (10) eine Einrichtung (12; 13) zugeordnet ist, um zu bewirken, daß der Wasserstrahl (12) im wesentlichen tangential auf die genannte Oberfläche des Umwälzfilters (7) gerichtet und in radialer Richtung bezüglich desselben ausgerichtet ist.
2. Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die der genannten wenigstens einen Düse (10) zugeordnete Einrichtung einen ringförmigen Ablenker (13) umfaßt, der sich benachbart dem Umfang des Umwälzfilters (7) erstreckt und von der genannten Düse (10) mit Wasser versorgt wird.
3. Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die der genannten wenigstens einen Düse (10) zugeordnete Einrichtung wenigstens ein Zweigrohr (12) an dem rotierenden Düsenträgerarm (6) umfaßt, der in der genannten Düse (10) endet.
4. Geschirrspülmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Filter (7) mit Durchlässen versehen ist, deren Abmessungen zwischen 0,2 und 0,3 mm liegen.
EP86115281A 1985-11-13 1986-11-04 Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter Expired - Lifetime EP0222306B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115281T ATE54560T1 (de) 1985-11-13 1986-11-04 Geschirrspuelmaschine mit selbstreinigendem rezirkulationsfilter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3410085U 1985-11-13
IT8534100U IT209170Z2 (it) 1985-11-13 1985-11-13 Macchina lavastoviglie con filtro di ricircolo autopulente.

Publications (2)

Publication Number Publication Date
EP0222306A1 EP0222306A1 (de) 1987-05-20
EP0222306B1 true EP0222306B1 (de) 1990-07-18

Family

ID=11239249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115281A Expired - Lifetime EP0222306B1 (de) 1985-11-13 1986-11-04 Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter

Country Status (5)

Country Link
EP (1) EP0222306B1 (de)
AT (1) ATE54560T1 (de)
DE (1) DE3672751D1 (de)
ES (1) ES1000793Y (de)
IT (1) IT209170Z2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE459554B (sv) * 1987-11-26 1989-07-17 Asea Cylinda Ab Foerfarande foer sjaelvrengoering av silsystem vid diskmaskin samt diskmaskin med organ foer genomfoerande av foerfarandet
WO1991008700A1 (en) * 1989-12-20 1991-06-27 Vulcan Australia Limited Filter screen assembly for dishwasher
US6001190A (en) * 1995-04-06 1999-12-14 General Electric Company Reduced energy cleaning appliance
DE19702982C2 (de) * 1997-01-28 1998-12-03 Whirlpool Co Geschirrspülmaschine mit unterem und oberem Sprüharm sowie mit Umwälzpumpe und Laugenpumpe
EP0852928B1 (de) * 1996-12-16 2003-04-23 Whirlpool Corporation Geschirrspülmaschine mit einem Ober- und Untersprüharm, einer Umwälzpumpe und einer Entleerungspumpe
US6782899B2 (en) * 2000-12-14 2004-08-31 Lg Electronics Inc. Dishwasher

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129711A (en) * 1960-09-29 1964-04-21 Gorman Rupp Ind Inc Dishwasher recirculating assembly
DE2508302C2 (de) * 1975-02-26 1976-12-02 Licentia Gmbh Geschirrspuelmaschine
DE2555153A1 (de) * 1975-12-08 1977-06-23 Licentia Gmbh Geschirrspuelmaschine
US4038103A (en) * 1976-07-27 1977-07-26 Hobart Corporation Dishwasher filter flushing system
FR2508304B1 (fr) * 1981-06-30 1986-02-07 Esswein Sa Lave-vaisselle a filtre de recyclage automatiquement nettoye
IT8434002V0 (it) * 1984-01-05 1984-01-05 Zanussi A Spa Industrie Macchine lavastoviglie con filtro salvapompa autopulente.

Also Published As

Publication number Publication date
ES1000793U (es) 1988-03-16
DE3672751D1 (de) 1990-08-23
ES1000793Y (es) 1988-11-16
ATE54560T1 (de) 1990-08-15
IT8534100V0 (it) 1985-11-13
EP0222306A1 (de) 1987-05-20
IT209170Z2 (it) 1988-09-16

Similar Documents

Publication Publication Date Title
US4972861A (en) Washing machine including improved apparatus for cleaning a recirculating filter thereof
US4392891A (en) Dishwasher soil collecting circuit
KR100412586B1 (ko) 진공청소기용 사이클론 집진장치의 그릴 조립체
KR100412585B1 (ko) 진공청소기용 사이클론 집진장치의 그릴 조립체
US5143306A (en) Waste disintegrating device for a dishwasher
EP0752231B1 (de) Geschirrspülmaschine mit Filtereinrichtung und -verfahren
CA2122793C (en) Cleaning wash-arm for dishwashing filter
US3575185A (en) Self-cleaning dishwasher strainer
JPS6319180B2 (de)
US5628334A (en) Dishwasher with food particle macerator and mincer
GB2360839A (en) Ventilator hood for a stove
EP0222306B1 (de) Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter
CN113180559A (zh) 清洗基站
US5566696A (en) Dishwasher with balancing vanes on pump impeller
GB2038171A (en) Improvements in or relating to dishwashers
KR200196942Y1 (ko) 식기세척기
EP0150478B1 (de) Geschirrspüler mit selbstreinigendem Pumpenschutzfilter
KR20040023417A (ko) 진공청소기용 사이클론 집진장치의 그릴 조립체
CN114098567A (zh) 一种清洗盘及安装有该清洗盘的电动清洁设备
CN212729658U (zh) 一种带有喷水装置的旋转托盘
GB2254542A (en) Dishwashing machine with self-cleaning recirculation filter
GB2200834A (en) Dishwasher with filter cleaning arrangement
CN216761698U (zh) 清洗设备用刷盘及选用该刷盘的清洗设备
CN217645169U (zh) 具有喷淋件的清洗机
JPH10127560A (ja) 食器洗い機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19871120

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: INDUSTRIE ZANUSSI S.P.A.

17Q First examination report despatched

Effective date: 19890417

ITF It: translation for a ep patent filed

Owner name: PROPRIA PROTEZIONE PROPR. IND.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 54560

Country of ref document: AT

Date of ref document: 19900815

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3672751

Country of ref document: DE

Date of ref document: 19900823

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19941001

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19941013

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19941020

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19941025

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19941130

Year of fee payment: 9

EAL Se: european patent in force in sweden

Ref document number: 86115281.7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19951104

Ref country code: AT

Effective date: 19951104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19951130

Ref country code: CH

Effective date: 19951130

Ref country code: BE

Effective date: 19951130

BERE Be: lapsed

Owner name: INDUSTRIE ZANUSSI S.P.A.

Effective date: 19951130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19960601

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960601

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20021010

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20021016

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20021022

Year of fee payment: 17

Ref country code: DE

Payment date: 20021022

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040602

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20031104

EUG Se: european patent has lapsed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040730

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051104