EP0938864B1 - Hydraulische Vorrichtung mit einem querschnittsverengten Siphon - Google Patents

Hydraulische Vorrichtung mit einem querschnittsverengten Siphon Download PDF

Info

Publication number
EP0938864B1
EP0938864B1 EP19980110130 EP98110130A EP0938864B1 EP 0938864 B1 EP0938864 B1 EP 0938864B1 EP 19980110130 EP19980110130 EP 19980110130 EP 98110130 A EP98110130 A EP 98110130A EP 0938864 B1 EP0938864 B1 EP 0938864B1
Authority
EP
European Patent Office
Prior art keywords
chamber
branch
duct
siphon
sensor means
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
EP19980110130
Other languages
English (en)
French (fr)
Other versions
EP0938864A1 (de
Inventor
Enzo Brignone
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.)
Bitron SpA
Original Assignee
Bitron 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 Bitron SpA filed Critical Bitron SpA
Publication of EP0938864A1 publication Critical patent/EP0938864A1/de
Application granted granted Critical
Publication of EP0938864B1 publication Critical patent/EP0938864B1/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
    • A47L15/4244—Water-level measuring or regulating arrangements

Definitions

  • the present invention relates to a hydraulic device for use mainly, but not exclusively, in the field of household appliances, particularly in dishwashers and washing machines according to the preamble of claim 1.
  • Such devices are known from, e.g., GB 1 468 870 A or EP 0 753 281 A.
  • the object of the present invention is to provide a device of the type indicated above in which, even in the presence of the necessary hydraulic conditions, normal siphoning does not start, at least for a time.
  • This object is achieved by means of a device of the type indicated above, characterized in that at least one cross-section of the intermediate portion is constricted in comparison with the cross-sections of the first and second branches.
  • This cross-section of the intermediate portion is preferably constricted by at least 50% in comparison with the cross-sections of the first and second branches.
  • constriction causes siphoning not to start normally in the duct, even in the presence of the hydraulic conditions necessary for starting, because air bubbles remain inside the duct and are not expelled, at least in the short term.
  • a hydraulic device comprises ( Figure 1), a first chamber 10 and a second chamber 12.
  • the first chamber 10 is a compartment of the filling system of a household appliance such as a dishwasher or a washing machine
  • the second chamber 12 is a region with which sensor means 14 are associated for providing a signal indicative of the level of liquid in the first chamber 10.
  • the sensor means are of a known type, for example, a pressure switch.
  • a first duct 16 connects the first chamber 10 to the second chamber 12. It is shaped like a siphon and has a first branch 18 in communication with the first chamber 10, a second branch 20 in communication with the second chamber 12, and an intermediate portion 22 connecting the first branch 18 to the second branch 20 and having a cross-section 24 which is constricted in comparison with that of the branches 18, 20.
  • the first chamber 10 also has a water-inlet duct 26 and an outlet duct 28 in which a solenoid valve 30 is disposed.
  • the water in the first chamber 10 When the latter is opened, the water in the first chamber 10 is discharged without difficulty through the duct 16.
  • the water in the second chamber 12, in which the sensor means 14 are present, on the other hand, is slowed by the constriction 24.
  • the sensor means 14 thus continue, for a certain time, to send a signal corresponding to the pre-existing level condition, which may be advantageous, in particular, with regard to the period of time required to empty the first chamber 10.
  • FIG. 2 shows a variant of the device of the invention.
  • parts identical or equivalent to those shown in the previous drawing retain the same reference numerals.
  • the first chamber 10 is a washing tank of a household appliance such as a dishwasher or washing machine
  • the second chamber 12 is a region with which sensor means 14, for example, a pressure switch, are associated for providing a signal indicative of the level of liquid in the first chamber.
  • the second branch 20 of the first siphon-shaped duct 16 also constitutes the first branch of a second siphon-shaped duct 32, the second arm 34 of which opens into the second chamber 12 and which is inverted relative to the first duct 16.
  • the liquid in the first chamber 10 can never come into direct contact with the sensor means 14 from which it is always isolated by an air bubble which cannot be eliminated because of the presence of the two siphon-shaped ducts 16, 32.
  • FIG. 3 shows a further variant of the device of the invention.
  • parts identical or equivalent to those shown in the previous drawings retain the same reference numerals.
  • the first chamber 10 is a washing tank of a household appliance such as a dishwasher or washing machine and the second chamber 12 is a compartment of the system for filling the washing tank.
  • the first and second chambers 10 and 12 are also connected by a third siphon-shaped duct 36 without a constriction.
  • the chambers also have respective liquid-supply ducts 38, 40.
  • the sensor means 14 detect the level of water in the second chamber 12 and are calibrated in a manner such as to bring about a further admission of water when the level measured is below a threshold level 42 higher than that at which the constriction 24 is disposed.
  • the water supplied through the duct 38 into the second chamber 12 is discharged through the third siphon duct 36 into the first chamber 10.
  • Conditions such as to prevent siphoning from starting may therefore arise in the duct 36, for example, as a result of an incorrect movement of the household appliance.
  • the first duct 16 enables water to flow out of the second chamber 12 into the first chamber 10 until the level of water in the second chamber 12 is reduced to that of the constriction 24.
  • This level is in any case lower than that of the threshold 42 so that, in the next working cycle of the appliance, the sensor means 14 can bring about a new flow of water into the second chamber 12.
  • the level in the first chamber 10 is such that the water therein tends to flow out into the second chamber 12, this is prevented by the constriction 24 which causes air bubbles to form in the second branch 20 of the duct 16 and siphoning consequently not to start.
  • the device of the invention can be used, for example, in household appliances such as dishwashers or washing machines.
  • one or more of its various components such as the chambers, the sensor means and the branches of the siphon duct, may be formed integrally with other elements of the household appliance, such as the sump or water softener.
  • these components may be assembled with the other elements of the household appliance in a manner such as to facilitate dismantling when it is necessary, for example, to perform cleaning operations.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Hydraulic Turbines (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (7)

  1. Hydraulische Vorrichtung, umfassend eine erste Kammer (10), eine zweite Kammer (12) mit dazugehörigen Flüssigkeitsstand-Messfühlereinrichtungen (14) und ein erstes siphonförmiges Rohr (16), das die erste Kammer (10) mit der zweiten Kammer (12) verbindet, wobei das erste siphonförmige Rohr (16) einen mit der ersten Kammer (10) in Verbindung stehenden ersten Zweig (18), einen mit der zweiten Kammer (12) in Verbindung stehenden zweiten Zweig (20) und einen den ersten Zweig (18) mit dem zweiten Zweig (20) verbindenden Zwischenteil (22) aufweist,
    wobei die Vorrichtung dadurch gekennzeichnet ist, dass zumindest ein Querschnitt (24) des Zwischenteils (22) im Vergleich zu den Querschnitten des ersten und des zweiten Zweigs (18, 20) eingeengt ist.
  2. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der Querschnitt (24) des Zwischenteils (22) im Vergleich zu den Querschnitten des ersten und des zweiten Zweigs (18, 20) um zumindest 50% eingeengt ist.
  3. Vorrichtung gemäß Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass die erste Kammer (10) eine Abteilung des Füllsystems eines Haushaltsgeräts wie z.B. einer Geschirrspülmaschine oder Waschmaschine ist und die zweite Kammer (12) ein Bereich ist, dem. Messfühlereinrichtungen (14) zur Abgabe eines Signals, das den Flüssigkeitsstand in der ersten Kammer (10) anzeigt, zugeordnet sind.
  4. Vorrichtung gemäß Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass die erste Kammer (10) ein Waschtank eines Haushaltsgeräts wie z.B. einer Geschirrspülmaschine oder Waschmaschine ist, die zweite Kammer (12) ein Bereich ist, dem Messfühlereinrichtungen (14) zur Abgabe eines Signals, das den Flüssigkeitsstand in der ersten Kammer (10) anzeigt, zugeordnet sind, und der zweite Zweig (20) des ersten siphonförmigen Rohrs (16) auch den ersten Zweig eines zweiten siphonformigen Rohrs (32) bildet, dessen zweiter Zweig in die zweite Kammer (12) mündet und das im Verhältnis zum ersten Rohr (16) gewendet ist.
  5. Vorrichtung gemäß Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass die erste Kammer (10) ein Waschtank eines Haushaltsgeräts wie z.B. einer Geschirrspülmaschine oder Waschmaschine ist und die zweite Kammer (12) eine Abteilung des Systems zum Füllen des Waschtanks ist, welcher Messfühlereinrichtungen (14) zur Abgabe eines Signals, das den Flüssigkeitsstand in der zweiten Kammer (12) anzeigt, zugeordnet sind, wobei die erste und die zweite Kammer (10, 12) auch durch ein drittes siphonförmiges Rohr (36) verbunden sind.
  6. Vorrichtung gemäß einem der vorhergehenden Ansprüche 1 und 2, dadurch gekennzeichnet, dass sie in einem Haushaltsgerät eingebaut ist und dass zumindest die zweite Kammer (12) oder die Füllstandsfiihlereinrichtung (14) oder der erste Zweig (18) und zweite Zweig (20) des ersten Rohrs (16) in einem anderen Bestandteil des Haushaltsgeräts wie z.B. dem Wasserenthärtungsapparat oder dem Sammelbehälter integriert ist.
  7. Vorrichtung gemäß einem der vorhergehenden Ansprüche 1 und 2, dadurch gekennzeichnet, dass sie in einem Haushaltsgerät eingebaut ist und dass zumindest die zweite Kammer (12) oder die Füllstandsfühlereinrichtung (14) oder der erste Zweig (18) und zweite Zweig (20) des ersten Rohrs (16) mit einem anderen Bestandteil des Haushaltsgeräts wie z.B. dem Wasserenthärtungsapparat oder dem Sammelbehälter solcherart zusammengebaut ist, um ein Auseinandernehmen zu ermöglichen.
EP19980110130 1998-02-25 1998-06-04 Hydraulische Vorrichtung mit einem querschnittsverengten Siphon Expired - Lifetime EP0938864B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO980147 1998-02-25
ITTO980147 IT1302064B1 (it) 1998-02-25 1998-02-25 Dispositivo idraulico comprendente un condotto a sifone avente unasezione strozzata.

Publications (2)

Publication Number Publication Date
EP0938864A1 EP0938864A1 (de) 1999-09-01
EP0938864B1 true EP0938864B1 (de) 2004-01-21

Family

ID=11416472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980110130 Expired - Lifetime EP0938864B1 (de) 1998-02-25 1998-06-04 Hydraulische Vorrichtung mit einem querschnittsverengten Siphon

Country Status (4)

Country Link
EP (1) EP0938864B1 (de)
DE (1) DE69821214T2 (de)
ES (1) ES2210616T3 (de)
IT (1) IT1302064B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20070474A1 (it) * 2007-06-29 2008-12-30 Premark Feg Llc Dispositivo integrato per il rilevamento del livello di liquido in una vasca di un elettrodomestico, in particolare una macchina lavastoviglie, ed elettrodomestico includente tale dispositivo
ITTO20080435A1 (it) * 2008-06-05 2009-12-06 Itw Metalflex Druzba Za Proizv Dispositivo di collegamento fluidico a montaggio rapido per un sensore di pressione per un elettrodomestico e sensore di pressione ad esso associato
ES2882833B2 (es) * 2020-06-02 2022-04-18 Sedal S L Conjunto de conduccion de liquidos y aparato que lo contiene

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2241062B1 (de) * 1973-08-17 1978-12-08 Europe Mfg Trust
IT1273159B (it) * 1994-04-27 1997-07-07 Bitron B Spa Dispositivo di regolazione del quantitativo di acqua alimentato ad una vasca di lavaggio di un apparecchio elettrodomestico
IT1269843B (it) * 1994-05-27 1997-04-15 Candy Spa Dispositivo di controllo per il carico di volumi differenziati di liquido di lavaggio in una lavastoviglie
IT1275551B (it) * 1995-07-14 1997-08-07 Prealpina Tecnoplastica Un dispositivo per il controllo del livello d'acqua di carico di macchine lavastoviglie e simili

Also Published As

Publication number Publication date
EP0938864A1 (de) 1999-09-01
ES2210616T3 (es) 2004-07-01
DE69821214D1 (de) 2004-02-26
DE69821214T2 (de) 2004-07-08
IT1302064B1 (it) 2000-07-20
ITTO980147A1 (it) 1999-08-25

Similar Documents

Publication Publication Date Title
US7988790B2 (en) Washing appliance water softener
TWI758524B (zh) 洗衣機
EP1802800B1 (de) Automatische spendervorrichtung für waschmittelzusammensetzungen
US20100000578A1 (en) Method for automatically flushing a bulk dispensing system in a cleaning appliance
TWI749250B (zh) 洗衣機
CN104862927B (zh) 上排水洗衣机及其水位控制方法
TWI749251B (zh) 洗衣機
EP0938864B1 (de) Hydraulische Vorrichtung mit einem querschnittsverengten Siphon
TWI755557B (zh) 洗衣機
US6901777B2 (en) Washing machine
EP1363527B1 (de) Vorrichtung zum anzeigen des wasserspiegelsniveaus für eine geschirrspülmaschine
EP0402331B1 (de) Vorrichtung für einen Füllstandssensor für Haushaltsgeräte
EP0669099B1 (de) Vorrichtung zum Regeln des Niveaus der Waschflüssigkeit in einem Geschirrspüler
EP1008324A1 (de) Verfahren zum Reinigen von Geschirr in einer Geschirrspülmaschine
WO2015051826A1 (en) Improved three-way valve suitable for use in a dishwasher
JP2001275918A (ja) 食器洗浄機
CN219699833U (zh) 基站及清洁系统
EP0931503A3 (de) Vorrichtung zum Steuern und Wiederherstellen des Wasserspiegels in einer Geschirrspülmaschine
GB2109223A (en) Water softening equipment for dishwashing machine
EP0153655B1 (de) Geschirrspüler mit Niveauregelung nach dem Überlaufprinzip
JP6735450B2 (ja) 洗濯機
EP0864290A2 (de) Zufuhr- und Dosiervorrichtung der Waschflüssigkeit in einer Geschirrspülmaschine
KR0119131Y1 (ko) 수위감지장치를 구비한 식기세척기
JPH11164804A (ja) 食器洗浄機
AU2002231480A1 (en) A water level indicating device for a dishwasher

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): DE ES FR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RTI1 Title (correction)

Free format text: HYDRAULIC DEVICE COMPRISING A SIPHON DUCT WITH CONSTRICTED CROSS-SECTION

17P Request for examination filed

Effective date: 20000225

AKX Designation fees paid

Free format text: DE ES FR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR

REF Corresponds to:

Ref document number: 69821214

Country of ref document: DE

Date of ref document: 20040226

Kind code of ref document: P

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2210616

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
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

Effective date: 20041022

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

Ref country code: ES

Payment date: 20070504

Year of fee payment: 10

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

Ref country code: DE

Payment date: 20070524

Year of fee payment: 10

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

Ref country code: FR

Payment date: 20070629

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090228

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: 20090101

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20080605

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: 20080630

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

Ref country code: ES

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

Effective date: 20080605