EP1210903A2 - Schutzwanne für Waschmaschine - Google Patents

Schutzwanne für Waschmaschine Download PDF

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Publication number
EP1210903A2
EP1210903A2 EP01660217A EP01660217A EP1210903A2 EP 1210903 A2 EP1210903 A2 EP 1210903A2 EP 01660217 A EP01660217 A EP 01660217A EP 01660217 A EP01660217 A EP 01660217A EP 1210903 A2 EP1210903 A2 EP 1210903A2
Authority
EP
European Patent Office
Prior art keywords
water
washing machine
protective
tray
protective tray
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
EP01660217A
Other languages
English (en)
French (fr)
Other versions
EP1210903B1 (de
EP1210903A3 (de
Inventor
Jyri Paavola
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.)
Ekspansio Engineering Ltd Oy
Ekspansio Engr Ltd Oy
Original Assignee
Ekspansio Engineering Ltd Oy
Ekspansio Engr Ltd Oy
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 Ekspansio Engineering Ltd Oy, Ekspansio Engr Ltd Oy filed Critical Ekspansio Engineering Ltd Oy
Publication of EP1210903A2 publication Critical patent/EP1210903A2/de
Publication of EP1210903A3 publication Critical patent/EP1210903A3/de
Application granted granted Critical
Publication of EP1210903B1 publication Critical patent/EP1210903B1/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
    • A47L15/4251—Details of the casing
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/10—Power supply arrangements, e.g. stand-by circuits
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D06F2105/60—Audible signals
    • 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 invention relates to a protective tray for a washing machine which is suitable for post-installing under the washing machine and which comprises a bottom and sidewalls and inside the tray a water alarm having at least a power supply, a sensor for detecting the presence of water and an audible signal device and/or discharge pump connected to the drain, which is/are connected to act when said sensor is in contact with water.
  • An object of the invention is to achieve a device by which water damage arising in connection with dish washing machines, laundry washing machines and other similar water-using appliances which at times operate automatically, i.e. without the occupant, and which have standard external dimensions can be minimized or at least said water damage can be limited so as to be as little as possible and moderate in respect of repair costs.
  • a second object of the invention is a version of such a device that can be installed if necessary by a layperson as well as a version that operates automatically, i.e. independently, to minimize possible water damage.
  • a third object of the invention is such a device which is reliable in operation and durable, but at the same time of a price so low as to be inconsequential for the occupant or user of the washing machine in relation to the reduced risk of damage.
  • the principal advantage of the invention is that the protective tray of the invention provides an alarm both for minor leakages, giving the occupant the opportunity to repair the washing machine or have it repaired or correct its settings in time before the building structure has suffered major damp damage, and also for sudden major leakages, informing the occupant of the leakage immediately it occurs so that the occupant can quickly close the obligatory stop valve and/or undertake other steps to limit the extent of water damage.
  • a second advantage of the invention is that the protective tray of the invention is in its simplest form an insignificant price compared with that of a washing machine and does not require the employment of an outside installer.
  • An additional advantage, however, is that the protective efficacy of the protective tray can be further considerably enhanced, although then in most cases it is necessary to use a professional installation firm and the price too is somewhat higher. Thus various levels of security are offered for the user.
  • Fig. 1 represents a protective tray for post-fitting according to the invention located under a washing machine, as seen from outside in an axonometric view.
  • the water alarm is shown in the Figure together with various possible implementations of its power supply.
  • Fig. 2 shows a more versatile embodiment of the water alarm of the protective tray according to the invention, comprising both a magnetically operated closing valve and a drainage pump for the protective tray.
  • Fig. 3 shows a simple embodiment of the water alarm of the protective tray according to the invention and its mechanical construction in a cross-section along the vertical place I-I of Fig. 1.
  • Figs. 4A - 4D show sensors of various types which react to the presence of water for use in the water alarm of the protective tray according to the invention.
  • the invention thus relates to a protective tray or protective tray assembly for a washing machine, such as in particular a dish washing machine, but also a laundry washing machine or other similar appliance.
  • the protective tray 2 according to the invention is preferably a single piece and typically consists of plastics. Naturally nothing prevents the manufacture of the protective tray from other material, such as metal, or from plastic by other manufacturing technique, such as from sheet plastics by welding or gluing.
  • the protective tray 2 has a bottom 11 and sidewalls 12 forming a sealed, continuous construction, which is so dimensioned that the protective tray is suitable to be post-installed under a washing machine 1, i.e. after the initial installation of the washing machine.
  • the horizontal dimensions W2, D2 of the protective tray correspond to the horizontal dimensions W1, D1 of the washing machine.
  • the horizontal dimensions W2 and D2 of the tray are as close as possible, for example, to the horizontal dimensions of the space reserved for a dish washing machine in a row of cupboards.
  • the dimensions W1 and D1 of the washing machine fit within the external dimensions of the protective tray or at most the external dimensions of the washing machine are equal to the external dimensions of the tray.
  • the height H of the sidewalls 12 of the protective tray 2 is dimensioned to correspond to the water volume of at least one load of the washing machine or preferably the water volume of two loads of the washing machine or even more if space allows.
  • the bottom 11 of the protective tray is essentially flat or planar at least for its lower surface 27a, so that said bottom 11 rests firmly upon the floor surface, whereon the weight G of the washing machine is transmitted through the bottom 11 to the floor surface 30.
  • the upper surface 27b of the bottom 11 is at least mainly flat or planar, so that the supporting legs 31 of the washing machine are well supported on it.
  • the bottom has a lower surface 27a and/or an upper surface 27b that acts as a flat surface, but that the actual lower surface and upper surface may consist, for example, of stiffening ribbing which effectively forms a plane even though the bottom part which achieves watertightness may deviate even considerably from a plane.
  • a water alarm 3 comprising at least a power supply 7, a sensor 6 for detecting the presence of water and an audible signal device 8.
  • the audible signal device 8 is connected to the sensor 6 and the power supply 7 in such a manner that the assembly gives an audible alarm when said sensor is in contact with water V.
  • a simple water alarm of this type is represented in Fig. 3 and in this case the water alarm 3 is a separate component 3a for placement on the bottom 11 of the protective tray 2.
  • the said water alarm 3 has a body preferably having a downwards convex uninterrupted cover 9, without openings like an inverted cup, comprising of an upper part 25a and downwards oriented edges 25b, which design protects the electrical components from possible leakage water running down on top of them.
  • the audible alarm device 8, power supply 7 and possible other electronics 4 of the water alarm 3, which can be connected to a circuit board 26 or alternatively directly to the lower surface of the cover 9 e.g. in depressions cast into the plastic part, are arranged in the upper part of the inside of the cover, for example against said upper part 25a, so that they remain operational for as long as possible when the protective tray fills with water V.
  • the cover 9 moveable or adjustable in the vertical direction P, so that the audible signal device 8, power supply 7 and possible other electronics 4 can in each individual application be set as high as the space permits, so that they become immersed in water as late as possible.
  • the sensor 6, on the other hand, is arranged in the lower part of said water alarm so as to be placed at a point approaching the upper surface 27b of the bottom 11 inside the tray. As can be seen from Fig.
  • the senor can be located for example on the surface of the base flange 22 which forms the lowest point of the body of the water alarm 3, in which case it can detect water V coming into the protective tray as soon as the water has risen above the thickness of said base flange, i.e. when the depth of water is 3 mm - 10 mm.
  • the water alarm 3 may alternative be a component 3b integrated into the protective tray 2, as is shown by broken lines in Fig. 1.
  • the water alarm 3 preferably has all the same features as the water alarm 3a, which forms a separate component.
  • the water alarm has the features presented in this description regardless of whether it is a separate component 3a or an integrated component 3b.
  • the body of the separate water alarm 3 represented in Fig. 3 also includes a lower part which comprises a relative wide base flange 22, upon which the water alarm stands freely, upwardly oriented edges 23, over which the downwards oriented edges 25b of cover 9 extend. Additionally in the edges 23 of said lower part are holes or slits 24 rising upwards from the base flange 22, which allow water V that has run into the tray on its bottom 11 to flow into the water alarm and further to the sensor 6.
  • the power supply 7 may be either a battery or a safety-insulated power supply for insertion into a mains socket outlet 5.
  • a battery can be located on the front sidewall 12 of the protective tray and connected by a conductor to other parts of the water alarm, as shown by a broken line in Fig. 1, or can be located in the water alarm 3 itself, as shown in Fig. 3. The purpose is to make replacement of the battery as easy and rapid an operation as possible. If desired the water alarm can be arranged with an additional alarm to alert the occupant to the need to replace the battery.
  • a safety-insulated mains power supply is always used when the water alarm according to the invention comprises a solenoid-operated closing valve 13 and/or discharge pump 10, as described below, since they require so much electrical power that for operational reliability it would perhaps not be possible to rely entirely on a battery or it would be necessary to use several large-size batteries.
  • the audible signal device 8 is advantageously a piezoelectric buzzer, because it is advantageous in price and using it a loud sound is obtained easily and with relatively low current.
  • cover 9 By suitably shaping and dimensioning the previously described cover 9 it can be made to resonate at the frequency of the piezoelectric element, which reinforces the audible signal.
  • suitable electronics 4 in the water alarm and to connect it to the occupant's telephone line, so that the device calls and sends an alarm to the occupant's mobile telephone.
  • Such sending of an alarm to the occupant's mobile telephone can also be arranged using so-called Blue Tooth technology, which is known per se.
  • the sensor 6 of the water alarm 3 is advantageously of a type, which detects water either by a change of capacitance ⁇ L between electrodes 19 or by a change of electrical resistance ⁇ R.
  • the principle of a sensor detecting change of capacity ⁇ L is shown in Fig. 4b, in which a capacitance L is formed by electrodes 19 which are inside insulating plastics with a gap 18 between them, whereon the capacitance changes when water V enters said gap 18 and replaces air.
  • the change of electrical resistance ⁇ R in sensor 6 may be caused firstly by a change from air to water V in a gap 18 between bare metal electrodes 17 in the sensor of Fig. 4A, because the electrical conductivity of both pure tap water and of used washing water is considerably greater than that of air.
  • the change of electrical resistance ⁇ R in sensor 6 may be caused by the greater thermal conductivity of water compared to that of air surrounding a resistive element 20; a solution of this type is represented in Fig. 4C, in which a so called NTC ( N egative T emperature C oefficient) or PTC ( P ositive T emperature C oefficient) resistor 20 is used as the sensor 6.
  • NTC N egative T emperature C oefficient
  • PTC P ositive T emperature C oefficient
  • a continuous electrical current passes through a sensor of this type keeping its internal temperature at a certain value and its ohmic resistance R at a certain value while it is surrounded by air, but when the surrounding medium changes to water, which conducts heat away from the resistor 20, the internal temperature of said resistor changes and thus also its ohmic resistance.
  • the change of electrical resistance ⁇ R in sensor 6 may be caused by contact occurring between electrodes 21 upon water eliminating a material 16 holding said electrodes apart.
  • a sensor of this type is shown in Fig. 4D, in which the electrodes 21 are formed as springs, the force of which attempts to bring said electrodes into mutual contact, but while dry this is prevented by a piece 16 which is electrically insulating but water soluble.
  • the protective tray 2 may additionally comprise a discharge pump 10 connected to a drain and/or a solenoid-operated closing valve 13 arranged in the inlet water hose 14 of the washing machine.
  • the solenoid-operated closing valve 13, which is closed by the water alarm 3 when the water alarm has come into contact with water V in the manner described, is preferably fitted between the fixed water supply pipe 28 and the inlet water hose 14 of the washing machine 1.
  • the protective tray 2 may additionally comprise a flexible protective hose 29 surrounding the inlet water hose 14 of the washing machine, the lower end of which protective hose is open to the bottom 11 of the protective tray thereby conducting water leaking from a ruptured inlet water hose into the protective tray to give an alarm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Packaging Of Machine Parts And Wound Products (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP01660217A 2000-11-30 2001-11-26 Schutzwanne für Waschmaschine Expired - Lifetime EP1210903B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20002624A FI109268B (fi) 2000-11-30 2000-11-30 Pesukoneen suoja-allas
FI20002624 2000-11-30

Publications (3)

Publication Number Publication Date
EP1210903A2 true EP1210903A2 (de) 2002-06-05
EP1210903A3 EP1210903A3 (de) 2005-01-19
EP1210903B1 EP1210903B1 (de) 2009-07-08

Family

ID=8559611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01660217A Expired - Lifetime EP1210903B1 (de) 2000-11-30 2001-11-26 Schutzwanne für Waschmaschine

Country Status (4)

Country Link
EP (1) EP1210903B1 (de)
AT (1) ATE435608T1 (de)
DE (1) DE60139178D1 (de)
FI (1) FI109268B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762652A1 (de) * 2005-09-09 2007-03-14 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Sicherheitsvorrichtung für Geschirrspülmaschinen und Waschmaschinen
KR100863859B1 (ko) * 2006-05-22 2008-10-15 마츠시타 덴끼 산교 가부시키가이샤 식기 세척기
CN102094307A (zh) * 2011-02-12 2011-06-15 南京乐金熊猫电器有限公司 具有漏水感应系统的洗衣机
ES2383427A1 (es) * 2009-06-23 2012-06-21 BSH Electrodomésticos España S.A. Maquina lavavajillas, en especial, maquina lavavajillas domestica.
EP2581026A2 (de) * 2011-10-13 2013-04-17 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit mindestens einem Leuchtelement an mindestens einer Beladeeinheit
WO2014056721A1 (en) 2012-10-08 2014-04-17 Arcelik Anonim Sirketi Dishwasher with improved leak-proofing
JP2018080448A (ja) * 2016-11-14 2018-05-24 シナネン株式会社 洗濯機用防水パン
EP3928678A1 (de) * 2020-06-26 2021-12-29 Miele & Cie. KG Steuervorrichtung für ein wasserführendes haushaltsgerät und haushaltsgerät
CN114277553A (zh) * 2021-12-20 2022-04-05 长虹美菱股份有限公司 一种洗衣机底脚
US11808664B1 (en) * 2023-05-15 2023-11-07 Corey Ryhorski Moisture-detecting water source shutoff device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422212A1 (fr) * 1978-04-04 1979-11-02 Morgante Georges Avertisseur de fuite d'eau et de securite
DE3425590A1 (de) * 1984-07-11 1986-01-23 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Sicherheitsvorrichtung gegen ueberschwemmung bei fluessigkeitsfuehrenden haushaltgeraeten
DE3537186A1 (de) * 1985-10-18 1987-04-23 Bosch Siemens Hausgeraete Sicherheitsvorrichtung gegen ueberschwemmung bei fluessigkeitsfuehrenden haushaltgeraeten
GB2235801A (en) * 1989-09-07 1991-03-13 David Stanley Bottomley Leak detection and warning system
GB2329501A (en) * 1997-09-12 1999-03-24 Carlton Ashley Rae A liquid overflow detection system
GB9929304D0 (en) * 1999-12-10 2000-02-02 May Peter T Leak alarm

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762652A1 (de) * 2005-09-09 2007-03-14 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Sicherheitsvorrichtung für Geschirrspülmaschinen und Waschmaschinen
KR100863859B1 (ko) * 2006-05-22 2008-10-15 마츠시타 덴끼 산교 가부시키가이샤 식기 세척기
ES2383427A1 (es) * 2009-06-23 2012-06-21 BSH Electrodomésticos España S.A. Maquina lavavajillas, en especial, maquina lavavajillas domestica.
CN102094307A (zh) * 2011-02-12 2011-06-15 南京乐金熊猫电器有限公司 具有漏水感应系统的洗衣机
EP2581026A2 (de) * 2011-10-13 2013-04-17 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit mindestens einem Leuchtelement an mindestens einer Beladeeinheit
US9332888B2 (en) 2012-10-08 2016-05-10 Arcelik Anonim Sirketi Dishwasher with improved leak-proofing
WO2014056721A1 (en) 2012-10-08 2014-04-17 Arcelik Anonim Sirketi Dishwasher with improved leak-proofing
JP2018080448A (ja) * 2016-11-14 2018-05-24 シナネン株式会社 洗濯機用防水パン
EP3928678A1 (de) * 2020-06-26 2021-12-29 Miele & Cie. KG Steuervorrichtung für ein wasserführendes haushaltsgerät und haushaltsgerät
DE102020116853A1 (de) 2020-06-26 2021-12-30 Miele & Cie. Kg Steuervorrichtung für ein wasserführendes Haushaltsgerät und Haushaltsgerät
CN114277553A (zh) * 2021-12-20 2022-04-05 长虹美菱股份有限公司 一种洗衣机底脚
CN114277553B (zh) * 2021-12-20 2024-03-29 长虹美菱股份有限公司 一种洗衣机底脚
US11808664B1 (en) * 2023-05-15 2023-11-07 Corey Ryhorski Moisture-detecting water source shutoff device

Also Published As

Publication number Publication date
DE60139178D1 (de) 2009-08-20
FI20002624A0 (fi) 2000-11-30
ATE435608T1 (de) 2009-07-15
EP1210903B1 (de) 2009-07-08
FI109268B (fi) 2002-06-28
EP1210903A3 (de) 2005-01-19

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