EP0239025A2 - Waschmaschine mit einer Heizvorrichtung für die Waschflüssigkeit - Google Patents

Waschmaschine mit einer Heizvorrichtung für die Waschflüssigkeit Download PDF

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Publication number
EP0239025A2
EP0239025A2 EP87104117A EP87104117A EP0239025A2 EP 0239025 A2 EP0239025 A2 EP 0239025A2 EP 87104117 A EP87104117 A EP 87104117A EP 87104117 A EP87104117 A EP 87104117A EP 0239025 A2 EP0239025 A2 EP 0239025A2
Authority
EP
European Patent Office
Prior art keywords
laundry
washing liquid
tub
heat exchanger
washing machine
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.)
Withdrawn
Application number
EP87104117A
Other languages
English (en)
French (fr)
Other versions
EP0239025A3 (de
Inventor
Maurizio Mori
Olindo Regazzo
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
Zanussi Elettrodomestici 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 Industrie Zanussi SpA, Zanussi Elettrodomestici SpA filed Critical Industrie Zanussi SpA
Publication of EP0239025A2 publication Critical patent/EP0239025A2/de
Publication of EP0239025A3 publication Critical patent/EP0239025A3/de
Withdrawn legal-status Critical Current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 
    • D06F39/04—Heating arrangements

Definitions

  • the present invention relates to a laundry washing machine particularly of the type in which the laundry is sprinkled by recirculation of the washing liquid, the machine being provided with a device for heating the washing liquid contained in the machine.
  • a laundry washing machine of this type is described for instance in European Patent Application No. 0146719 and comprises a washing liquid collecting receptacle disposed below the laundering tub, and a pump operable to take in the washing liquid collected in the receptacle for sprink­ling the laundry contained in a rotatable drum mounted in the laundering tub.
  • a heater element (usually an armoured electric resistor) for heating the washing liquid to the temperature required for the laundering operation.
  • the laundry particularly depending on the type of fabrics and degree of wear - tends to shed certain amounts of loose fiebrs during the washing oper­ation, such fibers tending to collect in the washing liquid collecting receptacle.
  • the receptacle is of rather reduced dimensions, and the presence therein of a fluid flow obstacle in the form of the heater element promotes a condition in which the loose fibers tend to be deposited on the heater element itself.
  • the solution essentially consists in the elimination of the washing liquid collecting receptacle and the provision of means for heating the washing liquid directly in the recirculation conduit of the machine.
  • the invention is thus directed to a laundry washing machine substantially comprising a laundering tub, a rot­atable drum mounted in the tub for containing the laundry, and a washing liquid recirculation system including a pump and conduit means connecting the bottom portion of the tub to the top portion thereof.
  • a laundry washing machine of this type is characterized in that an instant heat exchanger is associated to the recirculation conduit means, and at least one thermostat for controlling the temperature of the washing liquid is applied to the recirculation conduit means at a portion thereof between the heat exchanger and an inlet portion at the top portion of the laundering tub.
  • the front-loading laundry washing machine shown in fig. 1 substantially comprises a housing 10, a laundering tub 11 mounted in housign 10, and a rotatable drum 12 for contain­ing the laundry mounted in tub 11 and adapted to be rotated by a motor 13 via a belt and pulley transmission.
  • Water is supplied to tub 11 through an inlet conduit 14 provided with a valve 15 and a detergent container 16, and connected to a top portion of tub 11 through a flexible hose 17.
  • a bottom portion of tub 11 communicates with a chamber 19 containing a filter 20 for retaining foreign bodies which might otherwise damage the liquid circulation system of the machine.
  • a recircul­ation conduit 23 connects the outlet of the latter to an opening at the top of tub 11 for sprinkling the washing liquid recirculated by pump 22 onto the laundry contained in drum 12.
  • Pump 22 receives the washing liquid from flexible hose 18 through a connecting conduit 24, and is additionally connected to chamber 19 of filter 20 for recuperating any detergents precipitated in the chamber.
  • washing liquid heating device 26 Associated to recirculation conduit 23 is a washing liquid heating device 26 according to the invention.
  • heating device 26 comprises a block 27 made of a material of high thermal conductivity, for example aluminum, having an electric resistor 28 inserted therein, and recirculation conduit 23 passing therethrough.
  • Heating device 26 is suitable enclosed in an insulating liner 29 for avoiding the dispersion of heat.
  • Heating device 26 substantially acts as an instant heat exchanger and is preferably disposed adjacent a location of entry of recirculation conduit 23 into tub 11, so as to ensure that the washing liquid impinges on the laundry at the temperature required for the washing operation, i.e. without heat losses by dispersion.
  • a thermostat 30 (fig. 1) for controlling this temperature is disposed on recirculation conduit 23 at a portion there­of between heat exchanger 26 and the end portion of the conduit entering laundering tub 11 at the top thereof.
  • the invention is also applicable to a laundry washing machine of the top-loading type as illustrated in fig. 4.
  • a machine of this type the recirculation of the wash­ing liquid is brought about by means of a pump 31 taking the washing liquid from a chamber 32 containing a filter 33 and communicating with the bottom portion of a laundering tub 34.
  • the top portion of the latter is connected to a charging opening 35 by a sealing bellows 36.
  • Rotatably mounted in tub 34 is a drum 37 for containing the laundry to be washed.
  • the washing liquid is recirculated towards tub 34 through a recirculation conduit 38 connected at one end to the out­let of pump 31 and opening into the top portion of tub 34 through sealing bellows 36.
  • recirculation conduit 38 has a portion 39 of suitable length thereof formed as a closely wound helical coil.
  • Electric resistor 40 Inserted into helical coil 39 is an electric resistor 40 in a manner to form an instant heat exchanger. Electric resistor 40 is forced into the passage formed by the windings of coil 39 to thus ensure a high heat exchange efficiency in both heat conduction and radiation.
  • a thermostat 41 is mounted on recirculation conduit 38 between heat exchanger 39 and the entry of the conduit into bellows 36, for controlling the temperature of the washing liquid.
  • the laundry washing machine is provided with suitable control and safety devices for the correct operation of the appliance.
  • the two embodiments described are both based on the princ­iple of providing an instant heat exchanger associated to the recirculation conduit, to thereby simplify the liquid circulation system of the machine, reduce the number of obstacles to the flow of the washing liquid, and improve the efficiency of the heating device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP87104117A 1986-03-26 1987-03-20 Waschmaschine mit einer Heizvorrichtung für die Waschflüssigkeit Withdrawn EP0239025A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT45715/86A IT1192072B (it) 1986-03-26 1986-03-26 Macchina lavabiancheria con dispositivo di riscaldamento della liscivia
IT4571586 1986-03-26

Publications (2)

Publication Number Publication Date
EP0239025A2 true EP0239025A2 (de) 1987-09-30
EP0239025A3 EP0239025A3 (de) 1988-06-22

Family

ID=11257592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104117A Withdrawn EP0239025A3 (de) 1986-03-26 1987-03-20 Waschmaschine mit einer Heizvorrichtung für die Waschflüssigkeit

Country Status (2)

Country Link
EP (1) EP0239025A3 (de)
IT (1) IT1192072B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492766A2 (de) * 1990-12-28 1992-07-01 Fischer Industries, Inc. Wärmetauscher
ES2109838A1 (es) * 1993-03-31 1998-01-16 Bosch Siemens Hausgeraete Maquina lavadora con un tambor de carga lateral para ropa, alojado horizontalmente dentro de un recipiente de colada.
WO2005032322A3 (en) * 2003-09-29 2005-10-20 Self Propelled Res And Dev Spe Heat pump clothes dryer
FR2954783A1 (fr) * 2009-12-30 2011-07-01 Fagorbrandt Sas Procede de commande en fonctionnement d'une machine a secher le linge et machine a secher le linge associee.
WO2016030235A1 (de) * 2014-08-28 2016-03-03 BSH Hausgeräte GmbH Wäschepflegegerät mit einer zuführeinrichtung
US20170114487A1 (en) * 2007-11-12 2017-04-27 Tulga Simsek Washer-extractor machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH298110A (fr) * 1952-04-04 1954-04-30 Gallay Sa Machine à laver le linge.
US2914935A (en) * 1957-08-16 1959-12-01 Westinghouse Electric Corp Laundry apparatus
DE6604971U (de) * 1968-05-08 1970-03-19 Siemens-Electrogeräte GmbH, 1000 Berlin und 8OOO München Waschmaschine
DE6931058U (de) * 1969-08-01 1971-01-14 Siemens Elektrogeraete Gmbh Wasch- oder geschirrspuelmaschine mit einer heizeinrichtung.
DE2010680A1 (de) * 1970-03-03 1971-09-16 Siemens Elektrogeraete Gmbh Waschmaschine
EP0146719A2 (de) * 1983-12-06 1985-07-03 INDUSTRIE ZANUSSI S.p.A. Waschmaschine
WO1985003729A1 (en) * 1984-02-21 1985-08-29 Miele & Cie. Gmbh & Co. Process and device for washing linen in a drum washing machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH298110A (fr) * 1952-04-04 1954-04-30 Gallay Sa Machine à laver le linge.
US2914935A (en) * 1957-08-16 1959-12-01 Westinghouse Electric Corp Laundry apparatus
DE6604971U (de) * 1968-05-08 1970-03-19 Siemens-Electrogeräte GmbH, 1000 Berlin und 8OOO München Waschmaschine
DE6931058U (de) * 1969-08-01 1971-01-14 Siemens Elektrogeraete Gmbh Wasch- oder geschirrspuelmaschine mit einer heizeinrichtung.
DE2010680A1 (de) * 1970-03-03 1971-09-16 Siemens Elektrogeraete Gmbh Waschmaschine
EP0146719A2 (de) * 1983-12-06 1985-07-03 INDUSTRIE ZANUSSI S.p.A. Waschmaschine
WO1985003729A1 (en) * 1984-02-21 1985-08-29 Miele & Cie. Gmbh & Co. Process and device for washing linen in a drum washing machine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492766A2 (de) * 1990-12-28 1992-07-01 Fischer Industries, Inc. Wärmetauscher
EP0492766A3 (en) * 1990-12-28 1993-06-02 Fischer Industries Inc. Heat exchanger
ES2109838A1 (es) * 1993-03-31 1998-01-16 Bosch Siemens Hausgeraete Maquina lavadora con un tambor de carga lateral para ropa, alojado horizontalmente dentro de un recipiente de colada.
WO2005032322A3 (en) * 2003-09-29 2005-10-20 Self Propelled Res And Dev Spe Heat pump clothes dryer
US7055262B2 (en) 2003-09-29 2006-06-06 Self Propelled Research And Development Specialists, Llc Heat pump clothes dryer
US20170114487A1 (en) * 2007-11-12 2017-04-27 Tulga Simsek Washer-extractor machine
FR2954783A1 (fr) * 2009-12-30 2011-07-01 Fagorbrandt Sas Procede de commande en fonctionnement d'une machine a secher le linge et machine a secher le linge associee.
EP2341183A1 (de) * 2009-12-30 2011-07-06 FagorBrandt SAS Betriebsverfahren eines Wäschetrockners und dieses Verfahren anwendender Wäschetrockner
WO2016030235A1 (de) * 2014-08-28 2016-03-03 BSH Hausgeräte GmbH Wäschepflegegerät mit einer zuführeinrichtung
CN106605018A (zh) * 2014-08-28 2017-04-26 Bsh家用电器有限公司 具有供给装置的衣物处理器具
RU2668836C1 (ru) * 2014-08-28 2018-10-02 Бсх Хаусгерете Гмбх Прибор для ухода за бельем, снабженный подающим устройством

Also Published As

Publication number Publication date
EP0239025A3 (de) 1988-06-22
IT8645715A0 (it) 1986-03-26
IT1192072B (it) 1988-03-31

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