EP0022911B1 - Machine à laver avec dispositif pour empêcher le reflux d'eau - Google Patents

Machine à laver avec dispositif pour empêcher le reflux d'eau Download PDF

Info

Publication number
EP0022911B1
EP0022911B1 EP80102829A EP80102829A EP0022911B1 EP 0022911 B1 EP0022911 B1 EP 0022911B1 EP 80102829 A EP80102829 A EP 80102829A EP 80102829 A EP80102829 A EP 80102829A EP 0022911 B1 EP0022911 B1 EP 0022911B1
Authority
EP
European Patent Office
Prior art keywords
water
level
tub
supply nozzle
supply tube
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
Application number
EP80102829A
Other languages
German (de)
English (en)
Other versions
EP0022911A1 (fr
Inventor
Livio Furlan
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 AT80102829T priority Critical patent/ATE4409T1/de
Publication of EP0022911A1 publication Critical patent/EP0022911A1/fr
Application granted granted Critical
Publication of EP0022911B1 publication Critical patent/EP0022911B1/fr
Expired 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
    • A47L15/421—Safety arrangements for preventing water damage
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops

Definitions

  • This invention relates to a washing machine provided with a device for preventing backflow of water, comprising firstly a water supply tube including a supply pressure relief means communicating with the atmosphere at a level above the static water level within the water tub and entering said water tub, a part of said water supply tube being below the dynamic water level and said water supply tube comprising a water supply nozzle extending in an upward direction and interiorly of said water tub and secondly a decalcifier device, provided in said water supply tube between said supply pressure relief means and said water supply nozzle.
  • Such a washing machine in the form of a dishwasher is disclosed in the French Utility Model 2,298,252.
  • the water supply nozzle extends in an upward direction beyond the highest water level within the tub under static conditions, i.e., with the water circulation pump inoperative. This is absolutely necessary for preventing backflow of the contaminated washing water into the water supply tube with the resulting contamination particularly of the resin charge of the decalcifier device.
  • the water supply nozzle may be surmounted by a deflector for preventing the decalcified water from contacting corrosion-prone portions of the tub, and is normally integral with the water collecting well of the machine, from which it extends upwards to a level as indicated above.
  • the supply nozzle is easily damaged, as it is a rather fragile element usually made of plastics.
  • a washing machine disclosed in DE-A-2,710,364 comprises a water supply circuit including a supply tube downstream of the decalcifier device, which supply tube enters the bottom of the tub of the washing machine and extends in an upward direction beyond the highest water level within the tub under static conditions.
  • the invention as characterized by the claims solves the problem to provide a washing maching of the above-defined type, in which the water supply nozzle, while being integral with the bottom of the tub or rigidly affixed thereto, does not project thereabove, while still being capable of preventing any undesired backflow of contaminated water into the water supply circuit.
  • the washing machine is preferably a dishwashing machine having a washing tub 1 to the bottom of which a water collecting well 2 is attached in a sealing manner.
  • Water is supplied to the machine in a per se known manner from a tap 3 via a supply pressure relief device 4 communicating with the atmosphere and forming part of a water supply circuit exterior of the washing tub 1.
  • the supply circuit further includes a supply conduit 5, 5' and a decalcifier device 6 inserted therein.
  • the conduit portion or tube 5 extends to a point above the static water level A within tub 1, i.e. the water level attained with the circulation pump (not shown) inoperative, and to a point below the dynamic water level B attained during operation of the circulation pump.
  • conduit portion 5' is connected to a water supply nozzle 7 sealingly penetrating the wall of collecting well 2 and preferably formed integral therewith of a plastics material.
  • nozzle 7 extends in an upward direction, with its upper outlet opening 8 being located at a level C below the above defined static level A, and preferably below a mechanical filter 9 provided in the machine.
  • the upper end portion of nozzle 7 projects into an inverted cup-shaped element 10 preferably formed integral with mechanical filter 9, the opening of which is located at a level D above the above defined dynamic water level B within tub 1.
  • the supply nozzle 7 and the inverted cup-shaped element 10 are dimensioned such that the interior wall surface of element 10 and the exterior surface of the end portion of supply nozzle 7 together define an annular space (depicted in the drawing by the cross-hatched area between levels C and D) the volume of which is at least equal to the volume (also indicated by cross-hatching) of supply tube 5 between the static water level A and the level C of the outlet opening, taking into account the albeit minimal volume variation due to the compressibility of air.
  • tub 1 of the machine is initially filled with tap water via conduit 5, 5' and decalcifier 6 up to the static water level A. Due to the law of communicating conduits, this level is also attained in supply tube 5 communicating with the atmosphere via supply pressure relief device 4. Operation of the circulating pump subsequently causes the water level in collecting well 2 to drop to the dynamic level B, resulting in a limited amount of water to flow from supply nozzle 7 until the water in supply tube 5 has dropped to the level C of outlet opening 8. After the circulating pump terminates its operation, the water contained in the spray conduits flows back into well 2, whereby tub 1 is again filled up to the static level A.
  • the washing machine comprises a supply nozzle 7 which may be formed integrally with the collecting well 2 while not projecting thereabove, thus avoiding any functional deficiencies as indicated in the introduction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (2)

1. Machine à laver équipée d'un dispositif destiné à empêcher le reflux de l'eau, comprenant premièrement un tube d'alimentation en eau (5, 5') comportant un moyen de détente (4) de la pression d'alimentation communiquant avec l'atmosphère à un niveau situé au-dessus du niveau d'eau statique (A) à l'intérieur de la cuve à eau (1) et pénétrant dans ladite cuve à eau, une partie dudit tube d'alimentation en eau étant située sous le niveau d'eau dynamique (B), et ledit tube d'alimentation en eau comprenant une buse d'alimentation en eau (7) s'étendant dans une direction dirigée vers le haut et à l'intérieur de ladite cuve à eau, et deuxièmement un dispositif de décalcification (6) disposé dans ledit tube d'alimentation en eau entre ledit moyen de détente de la pression d'alimentation et ladite buse d'alimentation en eau, caractérisée en ce que l'ouverture de sortie (8) de ladite buse d'alimentation (7) est située à un niveau (C) situé sous le niveau d'eau statique (A), la partie d'extrémité de ladite buse d'alimentation s'étendant dans un élément (10) en forme de cuvette renversée sont l'ouverture est située à un niveau (D) au-dessus du niveau d'eau dynamique (B), la surface de paroi interne dudit élément en forme de cuvette et al surface extérieure de ladite partie d'extrémité de la buse d'alimentation délimitant un espace situé sous l'ouverture de sortie (8) et dont le volume est au moins égal au volume intérieur dudit tube d'alimentation (5) entre ledit niveau statique (A) et le niveau (C) de ladite ouverture de sortie, de sorte que, lorsque l'eau s'élève dans la cuve à eau (1), un volume d'air est emprisonné dans ledit espace et qu'ensuite l'air emprisonné est forcé dans ladite buse d'alimentation (7) en empêchant le reflux de l'eau de lavage contaminée dans ledit tube d'alimentation en eau (5').
2. Machine à laver selon la revendication 1, caractérisé en ce que ledit élément (10) en forme de cuvette renversée est réalisé d'une seule pièce avec un filtre mécanique (9) disposé dans ladite machine d'une manière en soi connue.
EP80102829A 1979-05-21 1980-05-21 Machine à laver avec dispositif pour empêcher le reflux d'eau Expired EP0022911B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102829T ATE4409T1 (de) 1979-05-21 1980-05-21 Waschmaschine mit einer vorrichtung zur verhinderung des wasserrueckflusses.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3402279 1979-05-21
IT3402279 1979-05-21

Publications (2)

Publication Number Publication Date
EP0022911A1 EP0022911A1 (fr) 1981-01-28
EP0022911B1 true EP0022911B1 (fr) 1983-08-10

Family

ID=11238741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102829A Expired EP0022911B1 (fr) 1979-05-21 1980-05-21 Machine à laver avec dispositif pour empêcher le reflux d'eau

Country Status (6)

Country Link
EP (1) EP0022911B1 (fr)
AR (1) AR222707A1 (fr)
AT (1) ATE4409T1 (fr)
AU (1) AU530282B2 (fr)
DE (1) DE3064524D1 (fr)
ES (1) ES249755Y (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1136461B (it) * 1980-11-28 1986-08-27 Zanussi A Spa Industrie Lavatrice automatica con circuito idraulico di alimentazione perfezionato
IT1192077B (it) * 1986-04-17 1988-03-31 Zanussi Elettrodomestici Lavastoviglie con mezzi distributori di sostanze additive e circuiti di rigenerazione del sistema di addolcimento dell'acqua
DE102010003359A1 (de) * 2010-03-26 2011-09-29 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298252A7 (fr) * 1975-01-15 1976-08-13 Bosch Siemens Hausgeraete Machine a laver la vaisselle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE623615A (fr) * 1961-10-16
DE1628681B2 (de) * 1966-08-04 1975-04-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einrichtung an Geschirrspülmaschinen zur Niveauregelung
DE2239671C3 (de) * 1972-08-11 1982-02-18 Euro Hausgeräte GmbH, 6680 Neunkirchen Waschbehälter einer Geschirrspülmaschine
FR2241062B1 (fr) * 1973-08-17 1978-12-08 Europe Mfg Trust
DE2710364C2 (de) * 1977-03-10 1983-10-13 Euro Hausgeräte GmbH, 6680 Neunkirchen Rückflußverhinderer für Geschirrspüler u.dgl.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298252A7 (fr) * 1975-01-15 1976-08-13 Bosch Siemens Hausgeraete Machine a laver la vaisselle

Also Published As

Publication number Publication date
ES249755Y (es) 1981-01-01
AR222707A1 (es) 1981-06-15
EP0022911A1 (fr) 1981-01-28
DE3064524D1 (en) 1983-09-15
AU5856280A (en) 1980-11-27
ATE4409T1 (de) 1983-08-15
ES249755U (es) 1980-06-16
AU530282B2 (en) 1983-07-07

Similar Documents

Publication Publication Date Title
EP0169847B1 (fr) Procede de nettoyage a la machine et machine de nettoyage appliquant ce procede
CN104545751B (zh) 水槽式清洗机的透气、溢水保护和清洗剂添加装置
US5070773A (en) Coffee or tea maker
US5515556A (en) Back jet flush toilet systems and methods
EP0382692B1 (fr) Dispositif de vidange pour machines à laver la vaisselle
CN104545748A (zh) 水槽式清洗机的溢水保护装置
US4562016A (en) Evaporative air-conditioner water bleed-off system
EP0022911B1 (fr) Machine à laver avec dispositif pour empêcher le reflux d'eau
EP0365500A1 (fr) Lave-vaisselle
US4162621A (en) Basket overflow for water recirculating clothes washing machine
CA1087994A (fr) Filtres pour canalisations d'eau
US4754772A (en) Arrangement in a dish-washing machine
US5107706A (en) Level sensor device for household appliances
CN204394441U (zh) 水槽式清洗机的溢水保护装置
EP0669099B1 (fr) Dispositif de contrôle de niveau de liquide laveur dans un lave-vaisselle
US5010920A (en) Device for emptying water from a dishwasher
WO1998031865A1 (fr) Lave-linge
EP0240641A2 (fr) Récipient pour plantes
JP2867603B2 (ja) 食器洗浄機
CN206109839U (zh) 水箱盖组件、水箱组件和挂烫机
EP0152893B1 (fr) Lave-vaisselle à détecteur de niveau du type à trop-plein
JP3237505B2 (ja) 水石鹸供給器
EP0580563A1 (fr) Dispositif de sécurité pour machines à laver la vaisselles, notamment pour détecter une grande consommation d'eau
CN215502850U (zh) 一种喷淋臂
GB2316631A (en) Separator for use in a fuel system

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

Designated state(s): AT DE FR GB IT NL SE

ITCL It: translation for ep claims filed

Representative=s name: INDUSTRIE ZANUSSI

17P Request for examination filed

Effective date: 19810114

TCAT At: translation of patent claims filed
DET De: translation of patent claims
ITF It: translation for a ep patent filed

Owner name: INDUSTRIE ZANUSSI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT DE FR GB IT NL SE

REF Corresponds to:

Ref document number: 4409

Country of ref document: AT

Date of ref document: 19830815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3064524

Country of ref document: DE

Date of ref document: 19830915

ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: INDUSTRIE ZANUSSI S.P.A.

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

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

Ref country code: SE

Payment date: 19840630

Year of fee payment: 5

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19860409

Year of fee payment: 7

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

Ref country code: NL

Payment date: 19860531

Year of fee payment: 7

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

Ref country code: AT

Effective date: 19870521

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

Ref country code: SE

Effective date: 19870522

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

Ref country code: NL

Effective date: 19871201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910410

Year of fee payment: 12

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920410

Year of fee payment: 13

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

Ref country code: DE

Payment date: 19920415

Year of fee payment: 13

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

Ref country code: FR

Effective date: 19930129

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: GB

Effective date: 19930521

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

Effective date: 19930521

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

Ref country code: DE

Effective date: 19940201

EUG Se: european patent has lapsed

Ref document number: 80102829.1

Effective date: 19880330