EP0938864A1 - Hydraulische Vorrichtung mit einem querschnittsverengten Siphon - Google Patents

Hydraulische Vorrichtung mit einem querschnittsverengten Siphon Download PDF

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Publication number
EP0938864A1
EP0938864A1 EP98110130A EP98110130A EP0938864A1 EP 0938864 A1 EP0938864 A1 EP 0938864A1 EP 98110130 A EP98110130 A EP 98110130A EP 98110130 A EP98110130 A EP 98110130A EP 0938864 A1 EP0938864 A1 EP 0938864A1
Authority
EP
European Patent Office
Prior art keywords
chamber
branch
duct
sensor means
cross
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
EP98110130A
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English (en)
French (fr)
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EP0938864B1 (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
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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

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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
    • A47L15/4244—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.
  • the device comprises a first chamber, a second chamber with associated liquid-level sensor means, and a first siphon-shaped duct connecting the first chamber to the second chamber and having a first branch in communication with the first chamber, a second branch in communication with the second chamber, and an intermediate portion connecting the first branch to the second branch.
  • 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)
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 true EP0938864A1 (de) 1999-09-01
EP0938864B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009147640A1 (en) * 2008-06-05 2009-12-10 Itw Metalflex, Druzba Za Proizvodnjo Delov Za Gospodinjske Aparate, D.O.O. Fast-fit fluidic connecting device for an electric household appliance pressure sensor, and relative pressure sensor
EP2009408A3 (de) * 2007-06-29 2010-01-27 Premark FEG L.L.C. Vorrichtung für den Nachweis des Füllstandes in einem Tank eines Elektrohaushaltsgeräts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2882833B2 (es) * 2020-06-02 2022-04-18 Sedal S L Conjunto de conduccion de liquidos y aparato que lo contiene

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1468870A (de) * 1973-08-17 1977-03-30
DE29506892U1 (de) * 1994-04-27 1995-06-29 Bitron S.p.A., Cantalupa, Turin/Torino Vorrichtung zum Regulieren der Wasserzufuhrmenge zu einem Spülbehälter eines Elektro-Haushaltsgeräts
EP0685198A1 (de) * 1994-05-27 1995-12-06 CANDY S.p.A. Steuerungsvorrichtung zur Lieferung von unterschiedlichen Mengen an Reinigungsflüssigkeiten in einer Geschirrspülmaschine
EP0753281A1 (de) * 1995-07-14 1997-01-15 TECNOPLASTICA PREALPINA S.p.A. Steuervorrichtung des Wasserniveaus in einer Geschirrspülmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1468870A (de) * 1973-08-17 1977-03-30
DE29506892U1 (de) * 1994-04-27 1995-06-29 Bitron S.p.A., Cantalupa, Turin/Torino Vorrichtung zum Regulieren der Wasserzufuhrmenge zu einem Spülbehälter eines Elektro-Haushaltsgeräts
EP0685198A1 (de) * 1994-05-27 1995-12-06 CANDY S.p.A. Steuerungsvorrichtung zur Lieferung von unterschiedlichen Mengen an Reinigungsflüssigkeiten in einer Geschirrspülmaschine
EP0753281A1 (de) * 1995-07-14 1997-01-15 TECNOPLASTICA PREALPINA S.p.A. Steuervorrichtung des Wasserniveaus in einer Geschirrspülmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2009408A3 (de) * 2007-06-29 2010-01-27 Premark FEG L.L.C. Vorrichtung für den Nachweis des Füllstandes in einem Tank eines Elektrohaushaltsgeräts
WO2009147640A1 (en) * 2008-06-05 2009-12-10 Itw Metalflex, Druzba Za Proizvodnjo Delov Za Gospodinjske Aparate, D.O.O. Fast-fit fluidic connecting device for an electric household appliance pressure sensor, and relative pressure sensor
US8353216B2 (en) 2008-06-05 2013-01-15 Itw Metalflex Fast-fit fluidic connecting device for an electric household appliance pressure sensor, and relative pressure sensor

Also Published As

Publication number Publication date
ES2210616T3 (es) 2004-07-01
ITTO980147A1 (it) 1999-08-25
DE69821214T2 (de) 2004-07-08
EP0938864B1 (de) 2004-01-21
DE69821214D1 (de) 2004-02-26
IT1302064B1 (it) 2000-07-20

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