EP0250870A2 - Kombinierte Maschine zum Waschen und Trocknen von Wäsche - Google Patents

Kombinierte Maschine zum Waschen und Trocknen von Wäsche Download PDF

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Publication number
EP0250870A2
EP0250870A2 EP87107688A EP87107688A EP0250870A2 EP 0250870 A2 EP0250870 A2 EP 0250870A2 EP 87107688 A EP87107688 A EP 87107688A EP 87107688 A EP87107688 A EP 87107688A EP 0250870 A2 EP0250870 A2 EP 0250870A2
Authority
EP
European Patent Office
Prior art keywords
laundry
condenser
drying
air
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Withdrawn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
EP87107688A
Other languages
English (en)
French (fr)
Other versions
EP0250870A3 (de
Inventor
Luigi Arreghini
Piero Durazzani
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
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 filed Critical Industrie Zanussi SpA
Publication of EP0250870A2 publication Critical patent/EP0250870A2/de
Publication of EP0250870A3 publication Critical patent/EP0250870A3/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Withdrawn legal-status Critical Current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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention relates to a combined machine of the domestic type for washing and drying laundry, and is directed in particular to a laundry washing and drying machine of the front-loading type comprising a tub and a drum rotatably mounted therein for containing the laundry during the washing and drying operations.
  • Machines of this type are already generally known and usually include a closed circuit for the drying air, in which the air is heated and recirculaetd through the laund­ry so as to entrain the moisture remaining therein at the end of the washing operation.
  • the air thus entraining the moisture is caused to pass through a condenser, in which the air is cooled for precipitating the moisture therefrom, whereupon the air continues its circulation.
  • the condenser For enabling it to condense the moisture entrained by the drying air, the condenser is connecetd to an outlet of the water mains.
  • the condensate is discharged via the discharge conduit of the machine with the aid of the discharge pump.
  • Machines of this type are described for instance in German Patents 2,529,577, 2,806,873, and 2,852,449.
  • German Patent Application No. 30 09 954 proposes an improved machine of the above type permitting part of the thermal energy to be recuperated by the use of two countercurrent heat exchangers through which the drying air is successively directed.
  • a combined machine of the domestic type for washing and drying laundry comprising a tub with a rotatable drum mounted therein for containing the laundry during the washing and drying operations, a first liquid flow circuit including a discharge pump for discharging the washing liquid from the tub, and a closed drying circuit including a blower for circulating heated air through the laundry and a surface condenser of the air-to-water type supplied via a second liquid flow circuit connected on the one hand to the water mains and on the other, to said discharge pump, the machine being character­ized in that said condenser is additionally connected to an open air-cooling circuit comprising a further blower.
  • a combined machine for washing and drying laundry according to the invention substantially comprises a housing 1 having a planar top cover 2, an instrument panel 3 carrying various control elements, and a door 4 closing the front wall of the housing.
  • housing 1 Contained within housing 1 is a tub 5 provided with a counterweight 6 and connected to housing 1 by a bellows-­type seal 7.
  • drum 8 Mounted within tub 5 is a drum 8 having a perforate cylind­rical peripheral wall internally provided with ribs 9 for entraining the laundry.
  • Drum 8 has a front access opening 10 in alignment with a similar opening 11 of tub 5. Openings 10 and 11 are closed by a bulleye-type door 12 hinged on housing 1.
  • Drum 8 is adapted to be rotated within tub 5 by the action of an electric motor 13 via a belt transmission 14.
  • Tub 5 is formed with a lower opening 15 connected via a conduit 16 to a discharge pump 17 and a discharge conduit 18 for discharging the washing and rinsing liquids at the end of the washing and rinsing operations, respectively.
  • the combined machine according to the invention further includes a drying section operable to circulate a current of heated air through the laundry contained in drum 8, so that the moisture contained in the laundry is extracted therefrom and subsequently condensed, the condensate being finally discharged from the machine.
  • the machine is provided with a blower 20, electric heater elements 21, and a condenser 22 included in a closed circuit comprising an output conduit 23 from blower 20 to tub 5 and a return conduit 24 from condenser 22 to blower 20.
  • Openings 25 are connected to condenser 22 via a conduit 26.
  • Condenser 22 is a surface condenser of the air-to-water countercurrent type connected to the water supply mains via a conduit 27 provided with a solenoid valve 28, and on its discharge side to discharge pump 17 through a conduit 29
  • a second air circuit comprising an intake conduit 30 for the intake of ambient air, a blower 31 for directing the air towards condenser 22 via a further conduit 32, and a discharge conduit 33 for discharging the air to atmosphere.
  • condenser 22 is substantially formed of a circular helical winding of the drying air conduit 26 in surface contact with the cooling air conduit 32.
  • the entry points of the two conduits 26 and 32 are disposed at opposite ends of the winding, so that the drying air, as represented by dotted arrows, flows through conduit 26 in a direction opposite to that of the cooling air flow through conduit 32 as represented by solid arrows.
  • the drying air conduit 26 has its lower portion suitably provided with ports 36 permitting the condensing water to escape towards conduit 29 (fig. 2).
  • the water supply conduit 27 directs a spray jet of cooling water into an end portion of the ascending section of conduit 26 so as to precipitate residual steam from the drying air before the latter enters the return conduit 24 towards blower 20.
  • the cooling water subsequently descends by gravity along the walls of conduit 26 towards the lower portion of condenser 22 from where it escapes through conduit 29 towards discharge pump 17.
  • condenser 22 is disposed, by way of non-limitative example, on the inner face of the front wall of the housing of the machine, it being evident, however, that it may also occupy other positions within the machine in a modified embodiment of the invention.
  • the condenser may thus be positioned in the rear part of the machine, in which case drying air conduit 26 may pass below tub 5.
  • the section of the machine for carrying out the drying oper­ation is thus formed as a closed circuit comprising blower 20 and condenser 22.
  • the condensation of the moisture within condenser 22 is brought about by means of an open water flow circuit 27 - 29 and an open cooling air circuit 30 - 33.
  • Blowers 20 and 31 are advantageously driven by a single motor 34 to thereby simplify and rationalize the construct­ion of the machine.
  • the motor 34 for driving the two blowers 20 and 31 is suitably connected to per se known and therefore not described devices for measuring the residual moisture of the laundry to thereby optimize the condensation of the moist air in the course of the drying operation and minimize the operating costs of the machine without resort­ing to increasing the supply of cooling water or to increasing the output of the heater element.
  • connection of motor 34 to the devices for measuring the residual moisture of the laundry permits the rotational speed of blowers 20 and 31 to be varied in such a manner that in a range between predetermined maximum and minimum values of the residual moisture they are rotated at a speed which is inversely proportional to the degree of residual moisture of the laundry as determined in the course of the drying operation.
  • This provision permits the operation of condenser 22 to be maintained at its highest level for the entire duration of the drying operation.
  • a further advantageous characteristic of the machine according to the invention is the provision of a stiffening collar 35 (fig. 2) inserted into bellows-type seal 7 at the side thereof facing towards tub 5. Collar 35 serves the purpose of ensuring the correct positioning of seal 7 adjacent front opening 10 of the drum.
  • seal 7 would be free to shift, permitting the drying air to escape and possibly resulting in undesirable frictional contact between seal 7 and the edge of opening 10 of drum 8.
  • the described laundry washing and drying machine is of course provided with all of the operating and control elements , such as a program control unit, thermostats, pressure switches and the like, conventionally employed in machines of this type and therefore not shown and described in detail.
  • operating and control elements such as a program control unit, thermostats, pressure switches and the like, conventionally employed in machines of this type and therefore not shown and described in detail.
  • the machine according to the invention may of course also be modified regarding for example the arrangement of its functional elements for adaptation to housings of different constructions, without thereby leaving the scope of protection of the described and claimed characteristics.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP87107688A 1986-06-26 1987-05-26 Kombinierte Maschine zum Waschen und Trocknen von Wäsche Withdrawn EP0250870A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4573286 1986-06-26
IT45732/86A IT1192085B (it) 1986-06-26 1986-06-26 Macchina combinata per il lavaggio e per l'asciugatura d biancheria

Publications (2)

Publication Number Publication Date
EP0250870A2 true EP0250870A2 (de) 1988-01-07
EP0250870A3 EP0250870A3 (de) 1988-06-29

Family

ID=11257866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107688A Withdrawn EP0250870A3 (de) 1986-06-26 1987-05-26 Kombinierte Maschine zum Waschen und Trocknen von Wäsche

Country Status (2)

Country Link
EP (1) EP0250870A3 (de)
IT (1) IT1192085B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816549A2 (de) * 1996-06-26 1998-01-07 CANDY S.p.A. Haushalts-Wasch- und Trockenmaschine mit geschlossenem Trocknungskreislauf, Luftkondensation und selbstreinigendem Filter
WO2006062262A1 (en) * 2004-12-06 2006-06-15 Lg Electronics Inc. Clothes dryer
WO2006062261A1 (en) * 2004-12-06 2006-06-15 Lg Electronics Inc. Clothes dryer
KR100774486B1 (ko) * 2006-10-31 2007-11-08 엘지전자 주식회사 의류 건조기
EP2241663A1 (de) * 2009-04-15 2010-10-20 Electrolux Home Products Corporation N.V. Wasch- und Trockenmaschine sowie Betriebsverfahren dafür
US8112903B2 (en) * 2006-02-21 2012-02-14 Electrolux Home Products Corporation N.V. Household clothes drying machine with additional condenser
DE102005018044B4 (de) * 2004-04-19 2013-10-10 Lg Electronics Inc. Trommelwaschmaschine mit Wäschetrocknungsfunktion
US9828715B2 (en) 2009-05-28 2017-11-28 Lg Electronics Inc. Laundry maching having a drying function

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2210522A1 (de) * 1972-03-02 1973-09-06 Siemens Elektrogeraete Gmbh Waeschetrockner
FR2316369A1 (fr) * 1975-07-02 1977-01-28 Lepper Gmbh Masch App Dispositif combine de lavage et de sechage a tambour
GB2026147A (en) * 1978-07-20 1980-01-30 Licentia Gmbh Laundry drier
GB2082741A (en) * 1980-07-23 1982-03-10 Bosch Siemens Hausgeraete Laundry Drier
GB2151466A (en) * 1983-12-16 1985-07-24 Bauknecht Hausgeraete Device for condensing vapour escaping from a vent in a dish washer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2210522A1 (de) * 1972-03-02 1973-09-06 Siemens Elektrogeraete Gmbh Waeschetrockner
FR2316369A1 (fr) * 1975-07-02 1977-01-28 Lepper Gmbh Masch App Dispositif combine de lavage et de sechage a tambour
GB2026147A (en) * 1978-07-20 1980-01-30 Licentia Gmbh Laundry drier
GB2082741A (en) * 1980-07-23 1982-03-10 Bosch Siemens Hausgeraete Laundry Drier
GB2151466A (en) * 1983-12-16 1985-07-24 Bauknecht Hausgeraete Device for condensing vapour escaping from a vent in a dish washer

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816549A3 (de) * 1996-06-26 1998-03-04 CANDY S.p.A. Haushalts-Wasch- und Trockenmaschine mit geschlossenem Trocknungskreislauf, Luftkondensation und selbstreinigendem Filter
EP0816549A2 (de) * 1996-06-26 1998-01-07 CANDY S.p.A. Haushalts-Wasch- und Trockenmaschine mit geschlossenem Trocknungskreislauf, Luftkondensation und selbstreinigendem Filter
DE102005018044B4 (de) * 2004-04-19 2013-10-10 Lg Electronics Inc. Trommelwaschmaschine mit Wäschetrocknungsfunktion
DE102005018044C5 (de) * 2004-04-19 2016-01-07 Lg Electronics Inc. Trommelwaschmaschine mit Wäschetrocknungsfunktion
DE102005018044B8 (de) * 2004-04-19 2013-12-24 Lg Electronics Inc. Trommelwaschmaschine mit Wäschetrocknungsfunktion
WO2006062261A1 (en) * 2004-12-06 2006-06-15 Lg Electronics Inc. Clothes dryer
US7908766B2 (en) 2004-12-06 2011-03-22 Lg Electronics Inc. Clothes dryer
US8826559B2 (en) 2004-12-06 2014-09-09 Lg Electronics Inc. Clothes dryer
US8863400B2 (en) 2004-12-06 2014-10-21 Lg Electronics Inc. Clothes dryer
WO2006062262A1 (en) * 2004-12-06 2006-06-15 Lg Electronics Inc. Clothes dryer
US8112903B2 (en) * 2006-02-21 2012-02-14 Electrolux Home Products Corporation N.V. Household clothes drying machine with additional condenser
KR100774486B1 (ko) * 2006-10-31 2007-11-08 엘지전자 주식회사 의류 건조기
EP2241663A1 (de) * 2009-04-15 2010-10-20 Electrolux Home Products Corporation N.V. Wasch- und Trockenmaschine sowie Betriebsverfahren dafür
US9828715B2 (en) 2009-05-28 2017-11-28 Lg Electronics Inc. Laundry maching having a drying function

Also Published As

Publication number Publication date
EP0250870A3 (de) 1988-06-29
IT1192085B (it) 1988-03-31
IT8645732A0 (it) 1986-06-26

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