EP2075366A1 - Flüssigkeitserwärmungsvorrichtung für eine Waschmaschine, insbesondere für eine Geschirrspülmaschine - Google Patents

Flüssigkeitserwärmungsvorrichtung für eine Waschmaschine, insbesondere für eine Geschirrspülmaschine Download PDF

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Publication number
EP2075366A1
EP2075366A1 EP08172277A EP08172277A EP2075366A1 EP 2075366 A1 EP2075366 A1 EP 2075366A1 EP 08172277 A EP08172277 A EP 08172277A EP 08172277 A EP08172277 A EP 08172277A EP 2075366 A1 EP2075366 A1 EP 2075366A1
Authority
EP
European Patent Office
Prior art keywords
duct
flow
thermally
liquid
air
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
EP08172277A
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English (en)
French (fr)
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EP2075366B1 (de
Inventor
Marco Simondi
Paolo Da Pont
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.)
Elbi International SpA
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Elbi International SpA
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Publication of EP2075366A1 publication Critical patent/EP2075366A1/de
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Publication of EP2075366B1 publication Critical patent/EP2075366B1/de
Not-in-force legal-status Critical Current
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    • 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 
    • D06F39/04—Heating arrangements
    • 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
    • A47L15/4285—Water-heater arrangements
    • 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
    • A47L15/48—Drying arrangements

Definitions

  • the present invention relates to a device for supplying and heating a washing liquid in a washing machine, in particular a dishwasher, in which a washing chamber is defined.
  • the subject of the invention is a device comprising a hollow body in which a (first) duct for the passage of a flow of liquid to be sent towards the washing chamber is defined, and with which an electrical resistance heater for heating the flow of liquid passing through the duct is associated.
  • a forced air-flow is circulated through the same duct of the above-defined liquid-heating device and is heated by the same heater that is associated with the duct.
  • This solution is highly efficient and leads to a substantial energy saving in comparison with rinsing with very hot water.
  • a quantity of liquid may remain in the duct of the device for heating the washing liquid and, although the quantity may be small, it may increase the moisture content of the air-flow which is subsequently heated in the device during the crockery-drying stage.
  • An object of the present invention is to provide a heating device of the type defined at the beginning which overcomes the above-mentioned disadvantages of the solutions of the prior art.
  • a device of the type defined at the beginning characterized in that a further or second duct, separated from the first duct by a thermally-conductive wall, is defined in the body for the passage of an air-flow which is also to be supplied to the washing chamber and which can be heated by the same heater during its passage through the further or second duct, the resistance heater being disposed in the second duct and being connected in an arrangement for exchanging heat with the thermally-conductive wall.
  • a dishwasher generally indicated DW, comprises, in known manner, a support structure 1 inside which a washing chamber 2 is defined.
  • the washing chamber 2 communicates with a sump 3 for collecting the liquid 4 which forms the washing bath.
  • an electric feed pump 5 draws a flow of washing liquid from the sump 3 and sends it to a heating device according to the invention, generally indicated 10.
  • the device 10 comprises a hollow body 11 which, in the embodiment shown by way of example, has a generally tubular configuration and is formed substantially by two half-shells 12 and 13 which are connected to one another in a fluid-tight manner with the interposition of a thermally-conductive separating wall, indicated 14 in Figures 1 , 3 and 4 .
  • Two passageways or ducts are thus defined in the region inside the body 11 for the passage of a flow of water and a flow of air which are used in the washing chamber 2, respectively.
  • the thermally-conductive wall 14 may advantageously be made of aluminium or an alloy thereof.
  • An electrical resistance heater 17 of known type is connected, for example, by means of a welded joint 18 ( Figure 4 ), to the surface of the wall 14 which faces the air duct 16 (crockery-drying air), the ends of the heater 17 with the respective terminals 17a extending outside the body 11.
  • the thermally-conductive wall 14 is substantially flat and extends in a longitudinal plane inside the body 11.
  • the duct 16 for the heating of the air that is used to dry the crockery has one or more air-inlet openings, indicated 19, which are constituted, for example, by longitudinal slots formed in the half-shell 13, as can be seen in Figure 2 and 3 .
  • This shell also forms an air outlet, indicated 20 in Figures 1 to 3 , which is connected to an electric circulation fan, indicated 21 in Figure 1 .
  • the electric fan is intended to convey to the washing chamber 2 an air-flow which is heated beforehand by the device 17 as that flow passes through the duct 16 of the device 10.
  • the duct 15 for the washing liquid is connected to the outlet or delivery of the electric pump 5.
  • the heating device 10 is combined with an associated motorized flow-diverter device, generally indicated 22 in Figures 1 to 3 .
  • This device which is of known type, comprises, basically, a hollow body 23 the interior of which communicates with the duct 15 of the heating device 10 through a passageway indicated 15a in Figure 1 .
  • the body 23 forms two outlet connectors 24 and 25 ( Figure 1 ) which are intended to be connected hydraulically to an upper spray rotor and to a lower spray rotor in the washing chamber 2, in known manner.
  • the flow-diverter device 22 comprises an electric motor 26 the rotor of which can rotate a disk 27 which is provided with openings through which the washing liquid that is heated as it passes through the duct 15 of the heating device 10 can be supplied selectively to one and/or the other outlet connector 24 and/or 25 and hence selectively to one and/or the other spray rotor.
  • the flow-diverter device 22 may advantageously be provided with an electrical device of known type, indicated 28, for detecting the turbidity of the washing liquid.
  • two openings or seats 29, 30 are advantageously formed in the half-shell 12 of the heating device 10; respective diaphragm and microswitch pressure sensors 31 and 32 for detecting the presence of water in the duct 15 are connected to the openings 29, 30.
  • the operative control unit of the machine brings about activation of the electric pump 5 and the supply of a current to the resistance heater 17.
  • the heater brings about rapid heating of the flow of washing liquid in the duct 15 as it passes through the duct.
  • the diverter 22 supplies the heated washing liquid to the spray rotors.
  • the control unit of the machine activates the electric fan 21 which draws a flow of air into the duct 16 through the openings or slots 19.
  • the unit also causes a current to flow through the heater 17 which heats the air-flow passing through the duct 16.
  • an electric temperature sensor and/or an electric humidity sensor may be associated with the heating device 10 to supply electrical signals indicative of the temperature and of the degree of humidity, respectively, of the air-flow used for drying the crockery and the control unit of the machine is advantageously arranged to control the activation of the resistance heater 17 and optionally also of the electric fan 21 according to the signals supplied by those sensors.
  • the body of the heating device 10 may comprise a substantially tubular outer wall and a thermally-conductive inner wall which is also tubular and extends longitudinally inside the outer wall.
  • the inner, thermally-conductive wall defines a first duct in its interior and, jointly with the outer wall, defines a second, annular duct extending around the first duct.
  • a flow of washing liquid may pass through the inner duct and an air-flow for drying the crockery is then intended to flow through the outer duct.
  • the air-flow for drying the crockery is intended to flow through the inner duct and the flow of washing liquid is intended to flow through the outer duct.
  • the resistance heater is advantageously disposed in the duct through which the air-flow is intended to pass, in an arrangement for exchanging heat with the thermally-conductive wall which separates the two ducts.
  • a heating device according to the invention could also advantageously be used in machines of other types, for example, in laundry washing/drying machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP08172277.9A 2007-12-24 2008-12-19 Flüssigkeitserwärmungsvorrichtung für eine Waschmaschine, insbesondere für eine Geschirrspülmaschine Not-in-force EP2075366B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000939A ITTO20070939A1 (it) 2007-12-24 2007-12-24 Dispositivo riscaldatore di fluidi per una macchina lavatrice, in particolare una macchina lavastoviglie

Publications (2)

Publication Number Publication Date
EP2075366A1 true EP2075366A1 (de) 2009-07-01
EP2075366B1 EP2075366B1 (de) 2016-07-06

Family

ID=40315927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08172277.9A Not-in-force EP2075366B1 (de) 2007-12-24 2008-12-19 Flüssigkeitserwärmungsvorrichtung für eine Waschmaschine, insbesondere für eine Geschirrspülmaschine

Country Status (4)

Country Link
EP (1) EP2075366B1 (de)
ES (1) ES2594890T3 (de)
IT (1) ITTO20070939A1 (de)
PL (1) PL2075366T3 (de)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8627832B2 (en) 2010-12-13 2014-01-14 Whirlpool Corporation Rotating filter for a dishwashing machine
US8667974B2 (en) 2009-12-21 2014-03-11 Whirlpool Corporation Rotating filter for a dishwashing machine
US8733376B2 (en) 2011-05-16 2014-05-27 Whirlpool Corporation Dishwasher with filter assembly
US8746261B2 (en) 2009-12-21 2014-06-10 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9005369B2 (en) 2011-06-20 2015-04-14 Whirlpool Corporation Filter assembly for a dishwasher
US9010344B2 (en) 2011-06-20 2015-04-21 Whirlpool Corporation Rotating filter for a dishwashing machine
US9034112B2 (en) 2010-12-03 2015-05-19 Whirlpool Corporation Dishwasher with shared heater
US20150157185A1 (en) * 2013-12-09 2015-06-11 Whirlpool Corporation Methods and apparatus to heat liquids in dishwashers
US9107559B2 (en) 2011-05-16 2015-08-18 Whirlpool Corporation Dishwasher with filter assembly
US9113766B2 (en) 2010-11-16 2015-08-25 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9119515B2 (en) 2010-12-03 2015-09-01 Whirlpool Corporation Dishwasher with unitary wash module
US9237836B2 (en) 2012-05-30 2016-01-19 Whirlpool Corporation Rotating filter for a dishwasher
US9265401B2 (en) 2011-06-20 2016-02-23 Whirlpool Corporation Rotating filter for a dishwashing machine
US9301667B2 (en) 2012-02-27 2016-04-05 Whirlpool Corporation Soil chopping system for a dishwasher
US9451862B2 (en) 2012-06-01 2016-09-27 Whirlpool Corporation Dishwasher with unitary wash module
US9532700B2 (en) 2012-06-01 2017-01-03 Whirlpool Corporation Dishwasher with overflow conduit
US9554688B2 (en) 2012-10-23 2017-01-31 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9668636B2 (en) 2010-11-16 2017-06-06 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9687135B2 (en) 2009-12-21 2017-06-27 Whirlpool Corporation Automatic dishwasher with pump assembly
US9730570B2 (en) 2012-05-30 2017-08-15 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9833120B2 (en) 2012-06-01 2017-12-05 Whirlpool Corporation Heating air for drying dishes in a dishwasher using an in-line wash liquid heater
US9861251B2 (en) 2011-06-20 2018-01-09 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US9918609B2 (en) 2009-12-21 2018-03-20 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US10136793B2 (en) 2014-07-23 2018-11-27 Whirlpool Corporation Dishwasher
US10631709B2 (en) 2017-06-28 2020-04-28 Haier Us Appliance Solutions, Inc. Heating assembly for a washing appliance
US10653291B2 (en) 2011-06-20 2020-05-19 Whirlpool Corporation Ultra micron filter for a dishwasher

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534438A1 (fr) * 1982-10-12 1984-04-13 Bosch Siemens Hausgeraete Chauffage electrique pour lave-vaisselle
WO1997042866A1 (en) * 1996-05-10 1997-11-20 I.R.C.A. S.P.A. - Industra Method for heating water and air in a wash cycle, particularly for dishwashers, resistance element to carry out the method and dishwasher implementing the method
EP1857584A2 (de) * 2006-05-17 2007-11-21 Herbert Kannegiesser GmbH Verfahren und Vorrichtung zum Behandeln, vorzugsweise Waschen, Schleudern und/oder Trocknen, von Wäsche

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534438A1 (fr) * 1982-10-12 1984-04-13 Bosch Siemens Hausgeraete Chauffage electrique pour lave-vaisselle
WO1997042866A1 (en) * 1996-05-10 1997-11-20 I.R.C.A. S.P.A. - Industra Method for heating water and air in a wash cycle, particularly for dishwashers, resistance element to carry out the method and dishwasher implementing the method
EP1857584A2 (de) * 2006-05-17 2007-11-21 Herbert Kannegiesser GmbH Verfahren und Vorrichtung zum Behandeln, vorzugsweise Waschen, Schleudern und/oder Trocknen, von Wäsche

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9687135B2 (en) 2009-12-21 2017-06-27 Whirlpool Corporation Automatic dishwasher with pump assembly
US8667974B2 (en) 2009-12-21 2014-03-11 Whirlpool Corporation Rotating filter for a dishwashing machine
US9375129B2 (en) 2009-12-21 2016-06-28 Whirlpool Corporation Rotating filter for a dishwashing machine
US8746261B2 (en) 2009-12-21 2014-06-10 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9211047B2 (en) 2009-12-21 2015-12-15 Whirlpool Corporation Rotating filter for a dishwashing machine
US10779703B2 (en) 2009-12-21 2020-09-22 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9918609B2 (en) 2009-12-21 2018-03-20 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9668636B2 (en) 2010-11-16 2017-06-06 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9113766B2 (en) 2010-11-16 2015-08-25 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9034112B2 (en) 2010-12-03 2015-05-19 Whirlpool Corporation Dishwasher with shared heater
US9532697B2 (en) 2010-12-03 2017-01-03 Whirlpool Corporation Dishwasher with unitary wash module
US9532696B2 (en) 2010-12-03 2017-01-03 Whirlpool Corporation Dishwasher with unitary wash module
US9119515B2 (en) 2010-12-03 2015-09-01 Whirlpool Corporation Dishwasher with unitary wash module
US9572473B2 (en) 2010-12-03 2017-02-21 Whirlpool Corporation Dishwasher with unitary wash module
US9364131B2 (en) 2010-12-13 2016-06-14 Whirlpool Corporation Rotating filter for a dishwashing machine
US8627832B2 (en) 2010-12-13 2014-01-14 Whirlpool Corporation Rotating filter for a dishwashing machine
US9538898B2 (en) 2011-05-16 2017-01-10 Whirlpool Corporation Dishwasher with filter assembly
US9700196B2 (en) 2011-05-16 2017-07-11 Whirlpool Corporation Dishwasher with filter assembly
US9167950B2 (en) 2011-05-16 2015-10-27 Whirlpool Corporation Dishwasher with filter assembly
US9107559B2 (en) 2011-05-16 2015-08-18 Whirlpool Corporation Dishwasher with filter assembly
US11882977B2 (en) 2011-05-16 2024-01-30 Whirlpool Corporation Dishwasher with filter assembly
US8733376B2 (en) 2011-05-16 2014-05-27 Whirlpool Corporation Dishwasher with filter assembly
US9265401B2 (en) 2011-06-20 2016-02-23 Whirlpool Corporation Rotating filter for a dishwashing machine
US10653291B2 (en) 2011-06-20 2020-05-19 Whirlpool Corporation Ultra micron filter for a dishwasher
US10178939B2 (en) 2011-06-20 2019-01-15 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US9005369B2 (en) 2011-06-20 2015-04-14 Whirlpool Corporation Filter assembly for a dishwasher
US10070769B2 (en) 2011-06-20 2018-09-11 Whirlpool Corporation Rotating filter for a dishwashing machine
US10058227B2 (en) 2011-06-20 2018-08-28 Whirlpool Corporation Filter assembly for a dishwasher
US10314457B2 (en) 2011-06-20 2019-06-11 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US9010344B2 (en) 2011-06-20 2015-04-21 Whirlpool Corporation Rotating filter for a dishwashing machine
US9861251B2 (en) 2011-06-20 2018-01-09 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US10813525B2 (en) 2011-06-20 2020-10-27 Whirlpool Corporation Ultra micron filter for a dishwasher
US10058228B2 (en) 2012-02-27 2018-08-28 Whirlpool Corporation Soil chopping system for a dishwasher
US9301667B2 (en) 2012-02-27 2016-04-05 Whirlpool Corporation Soil chopping system for a dishwasher
US11134825B2 (en) 2012-05-30 2021-10-05 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9730570B2 (en) 2012-05-30 2017-08-15 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9237836B2 (en) 2012-05-30 2016-01-19 Whirlpool Corporation Rotating filter for a dishwasher
US10076226B2 (en) 2012-05-30 2018-09-18 Whirlpool Corporation Rotating filter for a dishwasher
US10376128B2 (en) 2012-05-30 2019-08-13 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9833120B2 (en) 2012-06-01 2017-12-05 Whirlpool Corporation Heating air for drying dishes in a dishwasher using an in-line wash liquid heater
US9451862B2 (en) 2012-06-01 2016-09-27 Whirlpool Corporation Dishwasher with unitary wash module
US9532700B2 (en) 2012-06-01 2017-01-03 Whirlpool Corporation Dishwasher with overflow conduit
US9757008B2 (en) 2012-10-23 2017-09-12 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9962060B2 (en) 2012-10-23 2018-05-08 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9826882B2 (en) 2012-10-23 2017-11-28 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9554688B2 (en) 2012-10-23 2017-01-31 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9649007B2 (en) 2012-10-23 2017-05-16 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US20150157185A1 (en) * 2013-12-09 2015-06-11 Whirlpool Corporation Methods and apparatus to heat liquids in dishwashers
US10136793B2 (en) 2014-07-23 2018-11-27 Whirlpool Corporation Dishwasher
US10595706B2 (en) 2014-07-23 2020-03-24 Whirlpool Corporation Dishwasher with air system
US11259684B2 (en) 2014-07-23 2022-03-01 Whirlpool Corporation Dishwasher
US10631709B2 (en) 2017-06-28 2020-04-28 Haier Us Appliance Solutions, Inc. Heating assembly for a washing appliance

Also Published As

Publication number Publication date
ES2594890T3 (es) 2016-12-23
ITTO20070939A1 (it) 2009-06-25
PL2075366T3 (pl) 2017-02-28
EP2075366B1 (de) 2016-07-06

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