EP0555679A1 - Überschwemmungsschutzvorrichtung für Schläuche an Haushaltsmaschinen - Google Patents

Überschwemmungsschutzvorrichtung für Schläuche an Haushaltsmaschinen Download PDF

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Publication number
EP0555679A1
EP0555679A1 EP93101058A EP93101058A EP0555679A1 EP 0555679 A1 EP0555679 A1 EP 0555679A1 EP 93101058 A EP93101058 A EP 93101058A EP 93101058 A EP93101058 A EP 93101058A EP 0555679 A1 EP0555679 A1 EP 0555679A1
Authority
EP
European Patent Office
Prior art keywords
magnet
water supply
valve
water
flooding
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
EP93101058A
Other languages
English (en)
French (fr)
Other versions
EP0555679B1 (de
Inventor
Paolo Fornasari
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.)
RE-FLEX Srl
Original Assignee
RE-FLEX Srl
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Filing date
Publication date
Application filed by RE-FLEX Srl filed Critical RE-FLEX Srl
Publication of EP0555679A1 publication Critical patent/EP0555679A1/de
Application granted granted Critical
Publication of EP0555679B1 publication Critical patent/EP0555679B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage

Definitions

  • the present invention relates to an anti-flooding arrangement for water supply hoses of household appliances.
  • Household appliances such as for instance clothes washing machines and dishwashing machines, are connected to the water supply mains through a flexible hose made of reinforced rubber material. Owing to material aging, shocks and repeated bending during use, as well as possible failure of the related connection fittings, it may occur that the hose breaks eventually down under serious flooding risks.
  • An anti-flooding arrangement has already been proposed, which is responsive to changes in the air pressure differential to shut off the water supply when the water supply hose breaks down, ie. when a leakage occurs in the water supply hose.
  • the operation of such an arrangement is a critical one since, owing to the fact that it must operate in a pneumatically closed (ie. isolated) system, it is very sensitive to variations in barometric pressure and temperature, as well as pressure oscillations in the water supply mains.
  • a further anti-flooding arrangement known from the prior art uses an anhydrous, compressed sponge located externally of the regular path followed by the water flow in the hose, but in communication with the interstice existing between the hose itself and a sheath surrounding the hose.
  • the sponge is soaked by the water entering the interstice in case of a breakdown of the hose. It therefore starts to swell and press against the stem of a valve so as to cause it to shut off the water supply at the tap, thereby breaking off the flow through the hose.
  • an object of the present invention to provide an anti-flooding safety arrangement of the anhydrous-sponge type, to be used in connection with water supply hoses for household appliances, which is more reliable than the prior-art arrangements in particular as far as scaling and related effects are concerned.
  • a further object of the present invention is to provide an anti-flooding safety water supply hose for household appliances, which is less expensive than the various prior-art arrangements.
  • an inlet connector means 10 is equipped with a threaded-nut hose fitting 12 for connection to the water supply tap (not shown) of a water supply mains.
  • a flexible water inlet hose 18 of a washing machine is connected in a watertight manner to said connector means 10 by tightening a coupling sleeve 14 and inserting corresponding sealing rings 16 therebetween.
  • said flexible hose 18 is connected, even in this case through a coupling sleeve 19 and a pair of sealing rings 21, to an outlet connector means 20, which is in turn equipped with a threaded-nut fitting 22 for connection to a washing machine (not shown).
  • a corrugated sheath 24, which is clamped at both its ends on to the corresponding connectors with sealing rings 26, 28, is provided around the flexible hose 18.
  • the connector means 10 houses the body of a valve 30 equipped with an O-ring 32 arranged to press against the conical seat 34, guided by a pin 36 and biased against said conical seat 34 by a weak spring 38.
  • Said valve 30 carries a permanent magnet 40 featuring a pole shoe facing downwards.
  • a box 42 which is hydraulically isolated from the flexible hose 18, but communicates with the sheath 24.
  • a lever 44 Pivotally mounted in said box 42 is a lever 44 which carries at one of its ends a magnet 46 that has, in front of the magnet 40, a polar shoe 48 that is equal in sign to the polar shoe of the magnet 40.
  • said lever At its opposite end said lever carries an anhydrous, compressed sponge 50 of cellulose-based material, resting on a bracket 52 that is integral with said inlet connector means 10.
  • a weak spring 54 ensures that said lever is normally kept in the position shown in Figure 1.
  • the magnet 46 exerts a repulsion on the magnet 40, thereby keeping the valve 30 at a distance from the conical seat 34 and, as a consequence, in its open state.
  • the same water collects inside the sheath 24, thereby flooding the box 42 and soaking the sponge 50.
  • the soaked sponge 50 starts swelling and, overcoming the pulling force of the spring 54, it thereby moves the magnet 46 away from the magnet 40, so that no repulsion can be exterted on the latter any longer.
  • the valve 30 then moves downwards against the conical seat 34 owing first to the action of the spring 38 and then the pressure of the water from the supply mains against its upper surface. The water inlet flow is in this way shut off.
  • the actuation of the arrangement by magnetic force is instrumental in preventing water from possibly seeping through along sliding or rotating elements, such as this would generally occur in the case of a direct mechanical actuation, while moving mechanical elements are in contact with water only when the hose breaks down. As a consequence, the risks of jamming due to scale build-up on moving mechanical elements are sensibly reduced.
  • valve of the afore described arrangement is biased to close by the spring 38 associated therewith, and is normally kept open by the anti-flooding arrangement.
  • This type of operation enhances the reliability of the arrangement, since possible failures of component parts thereof, such as for instance a demagnetization of the magnets or a breakdown of the spring 54, would not impair the anti-flooding effectiveness of the arrangement, causing at the most the water supply to be shut off improperly.
  • the new operating condition of the arrangement is indicated by a coloured surface 56 of the lever 44, which becomes visible through a viewing window 58 provided in the wall of said box 42.
  • Both the connector means 10 and the box 42 are preferably made of a thermoplastic material, such as cross-linked polyethylene, polyamidic material or even polyvinyl chloride.
  • extension spring 54 might be replaced by a compression spring, or the spring might be provided to act on the opposite arm of the lever 44.
  • the magnets might be arranged in a different way and might be provided to operate by attraction instead of repulsion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Domestic Plumbing Installations (AREA)
EP93101058A 1992-01-30 1993-01-25 Überschwemmungsschutzvorrichtung für Schläuche an Haushaltsmaschinen Expired - Lifetime EP0555679B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO920065 1992-01-30
ITTO920065A IT1257369B (it) 1992-01-30 1992-01-30 Dispositivo antiallagamento per tubi d'alimentazione d'acqua di apparecchi elettrodomestici.

Publications (2)

Publication Number Publication Date
EP0555679A1 true EP0555679A1 (de) 1993-08-18
EP0555679B1 EP0555679B1 (de) 1996-04-17

Family

ID=11409964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93101058A Expired - Lifetime EP0555679B1 (de) 1992-01-30 1993-01-25 Überschwemmungsschutzvorrichtung für Schläuche an Haushaltsmaschinen

Country Status (4)

Country Link
EP (1) EP0555679B1 (de)
AT (1) ATE136956T1 (de)
DE (1) DE69302189T2 (de)
IT (1) IT1257369B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0683263A1 (de) * 1994-05-13 1995-11-22 CANDY S.p.A. Pneumatischer Fühler für Sicherheitsgerät zum Sperren von Wasserzufuhrumlauf in Geschirrspülmaschinen, waschmaschinen und dergleichen
EP0984093A1 (de) * 1998-09-02 2000-03-08 RE-FLEX S.r.l. Überflutungssicherung mit drehbaren Magneten
EP2290152A1 (de) 2009-08-24 2011-03-02 Andrea Dr. Restelli Leckverhinderungsvorrichtung für Wasserversorgungsleitungen von elektrischen Haushaltsgeräten
WO2012140598A2 (en) 2011-04-15 2012-10-18 Eltek S.P.A. Anti-flooding safety device for household appliances, in particular washing machines
IT201700026951A1 (it) * 2017-03-10 2018-09-10 Pavanello S A S Di Pavanello Giuseppe & C Gruppo valvola di sicurezza, particolarmente per il tubo di carico dell'acqua di lavatrici e lavastoviglie.
WO2020012517A1 (en) * 2018-07-12 2020-01-16 Seprio Plast Zn S.R.L. Anti-flooding duct with safety valve for supplying water
EP3692885A1 (de) * 2019-02-05 2020-08-12 Vestel Elektronik Sanayi ve Ticaret A.S. Maschine und verfahren zur hemmung des flusses von wasser in eine maschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110261654B (zh) * 2019-07-09 2020-05-05 湖北周一电气股份有限公司 便于读取和操作的电表箱结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024303B (de) * 1954-08-12 1958-02-13 Trist & Co Ltd Ronald Durch zwei aufeinander einwirkende Magnete betaetigtes Ventil
DE3236078A1 (de) * 1981-10-02 1983-04-14 Elbi International S.p.A., 10097 Regina Margherita-Collegno, Torino Sicherungsvorrichtung gegen das ueberlaufen bei waschmaschinen
DE3618258A1 (de) * 1985-07-31 1987-02-05 Eltek Spa Auf wasser ansprechende patronenvorrichtung, die in der lage ist, rberschwemmungssicherungen, insbesondere bei waschmaschinen, zu betaetigen und hierfuer ausgebildete rberschwemmungssicherungsvorrichtung
DE3743842A1 (de) * 1987-02-27 1988-09-08 Eltek Spa Ueberschwemmungsverhuetungsvorrichtung mit zwei sicherheitsventilen fuer waschmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024303B (de) * 1954-08-12 1958-02-13 Trist & Co Ltd Ronald Durch zwei aufeinander einwirkende Magnete betaetigtes Ventil
DE3236078A1 (de) * 1981-10-02 1983-04-14 Elbi International S.p.A., 10097 Regina Margherita-Collegno, Torino Sicherungsvorrichtung gegen das ueberlaufen bei waschmaschinen
DE3618258A1 (de) * 1985-07-31 1987-02-05 Eltek Spa Auf wasser ansprechende patronenvorrichtung, die in der lage ist, rberschwemmungssicherungen, insbesondere bei waschmaschinen, zu betaetigen und hierfuer ausgebildete rberschwemmungssicherungsvorrichtung
DE3743842A1 (de) * 1987-02-27 1988-09-08 Eltek Spa Ueberschwemmungsverhuetungsvorrichtung mit zwei sicherheitsventilen fuer waschmaschinen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0683263A1 (de) * 1994-05-13 1995-11-22 CANDY S.p.A. Pneumatischer Fühler für Sicherheitsgerät zum Sperren von Wasserzufuhrumlauf in Geschirrspülmaschinen, waschmaschinen und dergleichen
EP0984093A1 (de) * 1998-09-02 2000-03-08 RE-FLEX S.r.l. Überflutungssicherung mit drehbaren Magneten
EP2290152A1 (de) 2009-08-24 2011-03-02 Andrea Dr. Restelli Leckverhinderungsvorrichtung für Wasserversorgungsleitungen von elektrischen Haushaltsgeräten
WO2012140598A2 (en) 2011-04-15 2012-10-18 Eltek S.P.A. Anti-flooding safety device for household appliances, in particular washing machines
WO2012140598A3 (en) * 2011-04-15 2013-04-18 Eltek S.P.A. Anti-flooding safety device for household appliances, in particular washing machines
US9464725B2 (en) 2011-04-15 2016-10-11 Eltek S.P.A. Anti-flooding safety device for household appliances, in particular washing machines
IT201700026951A1 (it) * 2017-03-10 2018-09-10 Pavanello S A S Di Pavanello Giuseppe & C Gruppo valvola di sicurezza, particolarmente per il tubo di carico dell'acqua di lavatrici e lavastoviglie.
WO2020012517A1 (en) * 2018-07-12 2020-01-16 Seprio Plast Zn S.R.L. Anti-flooding duct with safety valve for supplying water
EP3692885A1 (de) * 2019-02-05 2020-08-12 Vestel Elektronik Sanayi ve Ticaret A.S. Maschine und verfahren zur hemmung des flusses von wasser in eine maschine

Also Published As

Publication number Publication date
DE69302189D1 (de) 1996-05-23
IT1257369B (it) 1996-01-15
DE69302189T2 (de) 1996-11-07
ITTO920065A0 (it) 1992-01-30
ITTO920065A1 (it) 1993-07-30
EP0555679B1 (de) 1996-04-17
ATE136956T1 (de) 1996-05-15

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