EP1329546A1 - Überflutungssicherungsvorrichtung für Geschirrspülmaschine oder Waschmaschine - Google Patents

Überflutungssicherungsvorrichtung für Geschirrspülmaschine oder Waschmaschine Download PDF

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Publication number
EP1329546A1
EP1329546A1 EP02425184A EP02425184A EP1329546A1 EP 1329546 A1 EP1329546 A1 EP 1329546A1 EP 02425184 A EP02425184 A EP 02425184A EP 02425184 A EP02425184 A EP 02425184A EP 1329546 A1 EP1329546 A1 EP 1329546A1
Authority
EP
European Patent Office
Prior art keywords
tray
float
regions
machine
flood
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
EP02425184A
Other languages
English (en)
French (fr)
Other versions
EP1329546B1 (de
Inventor
Andrea Ambrosi
Ezio Gobbi
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.)
Bonferraro SpA
Original Assignee
Bonferraro 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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to AT02425184T priority Critical patent/ATE247733T1/de
Priority to EP02425184A priority patent/EP1329546B1/de
Priority to ES02425184T priority patent/ES2204883T3/es
Priority to DE60200018T priority patent/DE60200018T2/de
Publication of EP1329546A1 publication Critical patent/EP1329546A1/de
Application granted granted Critical
Publication of EP1329546B1 publication Critical patent/EP1329546B1/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
    • A47L15/421—Safety arrangements for preventing water damage
    • A47L15/4212—Detection of water leaks; Collection of leaked water, e.g. in the casing
    • 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 washing machines or dishwashers provided with a flood-preventing device, and in particular a device of the type using a float as sensor element.
  • washing machines and dishwashers for domestic use are generally provided with a flood-preventing device having the function of stopping the entrance of water from the network in case of leak of some component of the machine, said device being substantially of either one of two types.
  • a pressure switch detects the pressure inside an air trap located in the sump on the tank bottom
  • a float detects the presence of water in a tray located at the bottom of the machine, in which a possible leak is collected, and it rises thus activating a microswitch.
  • the activation of the device causes the closing of the water inlet valve and usually also the activation of the drain pump, so as to prevent the risk of flooding.
  • Known float devices however have two drawbacks; a first drawback stems from the fact that such a device is not quick in detecting the leak because it requires that a certain amount of water is collected in the tray which is sufficient to raise the float until it touches the microswitch, and the tray has an area substantially equal to the area of the machine in order to prevent the outflow of water from the machine.
  • a second drawback is that such a device does not provide any indication about the type of failure which occurred in the machine, i.e. the repair technician has no possibility of understanding from where the water in the tray has come.
  • a further drawback which is not strictly related to the operation of the device, is the difficulty in checking the correct operation thereof since the manufacturing and testing phases.
  • the location of the float at the bottom of the machine makes its manual activation quite difficult once that the tray has been placed in position.
  • the risk that the float is damaged or moved while mounting the tray, so that it is made inoperative after a possible previous check.
  • the object of the present invention is to provide a flood-preventing device for a washing machine or dishwasher suitable to overcome the above-mentioned drawbacks.
  • a first advantage of the device according to the present invention is that of a shorter intervention time since the tray, while still covering the whole area of the machine, is divided into two regions, preferably a larger one and a smaller one, and therefore the level for the activation of the microswitch is reached faster especially in case of filling of the smaller region.
  • a second important advantage of this partition of the tray is the possibility for the repair technician to understand where the failure may be, depending on which portion of the tray has received the water.
  • Still another advantage of the present device is that of allowing a simple and safe way for a systematic check of the working thereof by means of a hole formed in the tray at the central portion of the float, said hole having obviously a rim higher than the tray rim. This results in a dramatic increase in the reliability of said device without requiring substantial modifications to achieve said further function, whereby the manufacturing costs and procedures remain substantially unchanged.
  • the device includes a tray R, to be arranged at the bottom of a dishwasher for example, in which there is internally formed a dividing wall W shaped so as to divide the tray into a smaller region A and a larger region B.
  • Region A is substantially ⁇ -shaped with an elongated "foot" on the right and in the center of the circular portion has a hole H with a raised rim higher than the tray rim, as previously mentioned.
  • Region B obviously has a shape complementary to region A, and has a pair of cylinders P symmetrically arranged with respect to said hole H.
  • these cylinders there are screwed screws S which secure a lid G on which there is mounted a microswitch M protected by a suitable cover N.
  • a float F of substantially rectangular shape is shaped so as to be arranged astride wall W, whereby a central portion (FA) of the float extends on the circular portion of region A and the lateral portions (FB) on the adjacent portions of region B.
  • the float has through holes to slip it on cylinders P so that it is retained by lid G, a bottom groove to receive the dividing wall W, as well as a central recess for hole H.
  • the central portion FA of the float is raised and reaches close to microswitch M, lid G following the shape of the float.
  • Tray R is capable of collecting in region B a possible water leak from any hydraulic component of the machine, such as the washing pump, a duct, etc. whereas if the water overflows from the tank due to failure of the level pressure switch or for other causes (e.g. failure of a valve), the water will be conveyed to region A by a duct.
  • hole H formed in tray R preferably at the center of the float, allows to check the working of the flood-preventing device by simply mechanically pushing upwards the float with any actuator or even a simple air jet. This type of check can easily be made automatic and carried out directly on the production line in a systematic manner, that is on 100% of the machines.
  • the above-described and illustrated embodiment of the device according to the invention is just an example susceptible of various modifications.
  • the shape of the dividing wall W may be somewhat changed, same as the blocking and guiding means for the float and the shape thereof, as long as the float is suitable to be arranged so that it is raised by the water flowing in any of the two regions of the tray.
  • tray R into more than two regions by means of more dividing walls, as long as the inflow of water in any of these regions causes the activation of the device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP02425184A 2002-03-22 2002-03-22 Überflutungssicherungsvorrichtung für Geschirrspülmaschine oder Waschmaschine Expired - Lifetime EP1329546B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT02425184T ATE247733T1 (de) 2002-03-22 2002-03-22 Überflutungssicherungsvorrichtung für geschirrspülmaschine oder waschmaschine
EP02425184A EP1329546B1 (de) 2002-03-22 2002-03-22 Überflutungssicherungsvorrichtung für Geschirrspülmaschine oder Waschmaschine
ES02425184T ES2204883T3 (es) 2002-03-22 2002-03-22 Dispositivo para impedir inundacion en lavaplatos o maquinas lavadoras.
DE60200018T DE60200018T2 (de) 2002-03-22 2002-03-22 Überflutungssicherungsvorrichtung für Geschirrspülmaschine oder Waschmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02425184A EP1329546B1 (de) 2002-03-22 2002-03-22 Überflutungssicherungsvorrichtung für Geschirrspülmaschine oder Waschmaschine

Publications (2)

Publication Number Publication Date
EP1329546A1 true EP1329546A1 (de) 2003-07-23
EP1329546B1 EP1329546B1 (de) 2003-08-20

Family

ID=8185850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02425184A Expired - Lifetime EP1329546B1 (de) 2002-03-22 2002-03-22 Überflutungssicherungsvorrichtung für Geschirrspülmaschine oder Waschmaschine

Country Status (4)

Country Link
EP (1) EP1329546B1 (de)
AT (1) ATE247733T1 (de)
DE (1) DE60200018T2 (de)
ES (1) ES2204883T3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005113881A1 (en) * 2004-04-23 2005-12-01 Lg Electronics Inc. Float switch of washing machine
EP1836943A2 (de) * 2006-03-21 2007-09-26 BITRON S.p.A. Sicherheitssystem gegen Flutung für eine Geschirrspülmaschine
WO2009065696A1 (de) * 2007-11-23 2009-05-28 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes haushaltsgerät mit einer sicherheitseinrichtung
US20110131735A1 (en) * 2009-12-07 2011-06-09 Lg Electronics Inc. Washing machine and washing method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005038016B4 (de) * 2005-08-09 2009-01-29 Miele & Cie. Kg Sicherheitseinrichtung für wasserführende Haushaltgeräte
DE102006047952A1 (de) * 2006-10-10 2008-04-17 BSH Bosch und Siemens Hausgeräte GmbH Hausgerät mit einer Sammelvorrichtung für Leckwasser
DE102012200406A1 (de) * 2012-01-12 2013-07-18 BSH Bosch und Siemens Hausgeräte GmbH Sicherheitssystem und wasserführendes Haushaltsgerät

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2401888A1 (de) * 1974-01-16 1975-07-17 Licentia Gmbh Ueberwachungsvorrichtung fuer das fluessigkeitsdurchlaufsystem in wasch- oder geschirrspuelmaschinen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2401888A1 (de) * 1974-01-16 1975-07-17 Licentia Gmbh Ueberwachungsvorrichtung fuer das fluessigkeitsdurchlaufsystem in wasch- oder geschirrspuelmaschinen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005113881A1 (en) * 2004-04-23 2005-12-01 Lg Electronics Inc. Float switch of washing machine
KR101082566B1 (ko) 2004-04-23 2011-11-10 엘지전자 주식회사 세탁기의 플로트 스위치
EP1836943A2 (de) * 2006-03-21 2007-09-26 BITRON S.p.A. Sicherheitssystem gegen Flutung für eine Geschirrspülmaschine
EP1836943A3 (de) * 2006-03-21 2008-07-02 BITRON S.p.A. Sicherheitssystem gegen Flutung für eine Geschirrspülmaschine
WO2009065696A1 (de) * 2007-11-23 2009-05-28 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes haushaltsgerät mit einer sicherheitseinrichtung
DE102007056425A1 (de) 2007-11-23 2009-05-28 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer Sicherheitseinrichtung
DE102007056425B4 (de) * 2007-11-23 2016-03-10 BSH Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer Sicherheitseinrichtung
US20110131735A1 (en) * 2009-12-07 2011-06-09 Lg Electronics Inc. Washing machine and washing method
US9284674B2 (en) * 2009-12-07 2016-03-15 Lg Electronics Inc. Washing machine and washing method

Also Published As

Publication number Publication date
DE60200018D1 (de) 2003-10-02
ES2204883T3 (es) 2004-05-01
DE60200018T2 (de) 2004-06-17
EP1329546B1 (de) 2003-08-20
ATE247733T1 (de) 2003-09-15

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