EP2014821B1 - Wäschetrockner für den Haushalt - Google Patents

Wäschetrockner für den Haushalt Download PDF

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Publication number
EP2014821B1
EP2014821B1 EP07112495A EP07112495A EP2014821B1 EP 2014821 B1 EP2014821 B1 EP 2014821B1 EP 07112495 A EP07112495 A EP 07112495A EP 07112495 A EP07112495 A EP 07112495A EP 2014821 B1 EP2014821 B1 EP 2014821B1
Authority
EP
European Patent Office
Prior art keywords
laundry
water
electric boiler
electric
heat exchanger
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.)
Not-in-force
Application number
EP07112495A
Other languages
English (en)
French (fr)
Other versions
EP2014821A1 (de
Inventor
Ugo Favret
Flavio Noviello
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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
Priority to EP07112495A priority Critical patent/EP2014821B1/de
Priority to DE602007010918T priority patent/DE602007010918D1/de
Priority to ES07112495T priority patent/ES2356141T3/es
Priority to AT07112495T priority patent/ATE490366T1/de
Priority to PL07112495T priority patent/PL2014821T3/pl
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to RU2010105035/12A priority patent/RU2501897C2/ru
Priority to PCT/EP2008/005699 priority patent/WO2009010245A1/en
Publication of EP2014821A1 publication Critical patent/EP2014821A1/de
Application granted granted Critical
Publication of EP2014821B1 publication Critical patent/EP2014821B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/203—Laundry conditioning arrangements
    • 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
    • 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 

Definitions

  • the present invention relates to a home laundry drier.
  • the present invention relates to a rotary-drum home laundry drier, to which the following description refers purely by way of example.
  • rotary-drum laundry driers substantially comprise a substantially parallelepiped-shaped outer box casing; a cylindrical laundry drum housed in axially rotating manner inside the box casing, directly facing a laundry loading and unloading opening formed in the front face of the casing; a door hinged to the front face of the casing to rotate to and from a rest position closing the opening in the front face of the casing to seal the laundry drum; and an electric motor for rotating the laundry drum about its longitudinal axis inside the casing.
  • Rotary-drum laundry driers of the above type also comprise a closed-circuit, hot-air generator designed to circulate inside the laundry drum a stream of hot air with a low moisture content and which flows through the laundry drum and over the laundry inside the drum to rapidly dry the laundry.
  • the closed-circuit, hot-air generator comprises an air/air heat exchanger and an electric heater located one after the other along an air recirculating conduit, the two ends of which are connected to the laundry drum, on opposite sides of the latter.
  • the air/air heat exchanger provides for rapidly cooling the airflow from the laundry drum to condense the surplus moisture in the airflow; and the heater provides for rapidly heating the airflow from the heat exchanger back to the laundry drum, so that the air flowing into the drum is heated rapidly to a temperature higher than or equal to that of the same air flowing out of the laundry drum.
  • Some more recently marketed rotary-drum driers also feature a pressurized-steam generator which, at the end of the drying cycle, feeds a jet of steam into the laundry drum to eliminate or at least greatly reduce creasing of the fabrics during the drying cycle.
  • steam generators comprises a demineralized water reservoir which is located in the highest portion of the household appliance so as to facilitate manual refilling of demineralized water; and a steam generation electric boiler which is usually located below the demineralized water reservoir and is in communication with the latter via a connecting pipe. Water flows into the electric boiler for gravity.
  • EP 1 441 059 A1 discloses such a home laundry drier with a closed-circuit, hot-air generator, the laundry drier comprising also a steam generator which is supplied by a pump with water received from a tank.
  • a control unit controls the water flow to the steam generator subject to the operating temperature or to the total electric input power of the steam generator in order to receive a complete vaporization of the supplied water.
  • a garment finishing apparatus for dewrinkling clothes comprises air circulating and heating means.
  • a steam generator is comprised for being provided with a constant quantity of water in order to produce a predefined quantity of steam.
  • US 4,519,145 teaches a laundry drier comprising an electrostatic and moisture control system. In order to eliminate static electricity in the clothes after the drying cycle moisture collected during the drying cycle is injected into the drier drum by means of a pump.
  • US 2007/0006484 A1 discloses a laundry drier comprising an air circulation channel. An odour filter is arranged in said channel. During the drying cycle condensed moisture is collected within a water tank. The laundry drier can also be used for removing odours from clothes which cannot be washed. To this end an evaporator is supplied with water from the water tank; a metering device controls the water supply. The produced steam is fed into the drier drum therein removing odours from the fabrics.
  • a home laundry drier as claimed in Claim 1 and preferably, though not necessarily, in any one of the Claims depending directly or indirectly on Claim 1.
  • Number 1 in the attached drawing indicates as a whole a home laundry drier substantially comprising a preferably, though not necessarily, parallelepiped-shaped outer box casing 2; an airtight, preferably, though not necessarily, cylindrical laundry drying tub or chamber 3 for housing the laundry to be dried, and which is fixed substantially horizontally inside casing 2, directly facing a laundry loading and unloading opening 2a formed in the front face of casing 2; a door 4 hinged to the front face of casing 2 for rotating to and from a rest position closing opening 2a in the front face to seal the laundry drying tub 3; and a preferably, though not necessarily, cylindrical laundry drum 5 for housing the laundry to be dried, and which is housed in axially rotating manner and preferably, though not necessarily, horizontally inside the drying tub 3.
  • laundry drum 5 is provided with an end wall 5a and possibly a cylindrical lateral wall perforated, or at any rate permeable to air, to permit airflow into the drum 5; and it is mounted for rotation about its longitudinal axis L which, in the example shown, coincides with the longitudinal axis of the drying tub 3.
  • Laundry drier 1 also comprises an electric motor 6 or similar, which, on command, rotates laundry drum 5 about longitudinal axis L inside drying tub 3; and a closed-circuit, hot-air generator 7 housed inside casing 2 and designed to circulate through laundry drum 5 a stream of hot air having a low moisture level, and which flows over and rapidly dries the laundry inside drum 5.
  • hot-air generator 7 provides for gradually drawing air from drying tub 3; extracting surplus moisture from the hot air drawn from drying tub 3; heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from drying tub 3; and feeding the heated, dehumidified air back into drying tub 3, where it flows over, to rapidly dry, the laundry inside the tub.
  • hot-air generator 7 provides for continually dehumidifying and heating the air circulating inside drum 5 to rapidly dry the laundry inside the latter, and substantially comprises:
  • the intake end of recirculating conduit 8 is integrated in door 4, and the exhaust end of recirculating conduit 8 is coupled directly to drying tub 3, in front of end wall 5a of laundry drum 5.
  • drier 1 also comprises an electronic central control unit 12, which controls electric motor 6, fan 9, heat exchanger 10 (or, rather, the cooling fan 13 of heat exchanger 10, which generates cold airflow w through the exchanger) and heater 11 in predetermined manner, as memorized inside it, to perform the user-selected drying cycle.
  • heat exchanger 10 is located at the bottom of casing 2, and it is also provided with a condensed-water canister 14 which collects the liquid distilled water produced, when the drier is running, inside heat exchanger 10 by condensation of the surplus moisture in airflow f arriving from drying tub 3. Obviously condensed-water canister 14 is located in the bottom of heat exchanger 10.
  • hot-air generator 7 also comprises an instant in-pressure electric boiler 15 designed to receive a given quantity of water and immediately convert said water into a stream of low-pressure steam whose pressure is slightly higher than external pressure; an electric pump 16 which, on command, sucks the distilled water from water canister 14 and feeds it to electric boiler 15; and a steam exhaust manifold 17 connecting the outlet of electric boiler 15 to recirculating conduit 8 preferably, though not necessarily, upstream from heater 11, to feed the low-pressure steam produced in electric boiler 15 directly to drying tub 3 and laundry drum 5 via the end portion of recirculating conduit 8.
  • instant in-pressure electric boiler 15 is housed inside casing 2, immediately over heat exchanger 10, and substantially consists of an airtight container housing a resistor dimensioned to immediately vaporize water fed into the airtight container.
  • the airtight container has a calibrated hole or opening which is dimensioned to slow down steam spillage and increase the pressure of the steam inside the airtight container to above external pressure.
  • electric pump 16 is housed inside casing 2 immediately over heat exchanger 10, or at least over water canister 14, and preferably, though not necessarily, side by side to electric boiler 15, and it is structured to suck the distilled water from beneath water canister 14, via an intake pipe 18 connecting the inlet of electric pump 16 to the bottom of water canister 14 across heat exchanger 10.
  • electric pump 16 is dimensioned to produce an inlet suction pressure capable of sucking the distilled water from water canister 14 up to electric boiler 15. More in details, in the example shown electric pump 16 is a self-priming volumetric pump, namely a membrane pump.
  • Electric boiler 15 and membrane pump 16 are commonly known parts in the industry, and therefore not described in detail.
  • Electronic central control unit 12 obviously controls electric boiler 15, electric pump 16 and the other component parts of hot-air generator 7, such as fan 9 and/or fan 13 of heat exchanger 10, so as to feed steam into drying tub 3 and drum 5 according to the selected drying cycle, and also to feed, when required, a stream of low-pressure steam into drying tub 3 and drum 5.
  • central control unit 12 calculates the instant flow rate of the low-pressure steam coming out from electric boiler 15 according to the electric power supplied to the resistor of electric boiler 15, and to the temperature inside the airtight container of electric boiler 15; and controls electric pump 16 so as that the instant flow rate of the distilled water supplied to electric boiler 15 is almost equal to the instant flow rate of low-pressure steam coming out from electric boiler 15.
  • the instant temperature inside the airtight container of electric boiler 15 is determined via a temperature sensor of known type (not shown) housed inside the airtight container.
  • central control unit 12 switches on and off electric boiler 15 according to the selected drying cycle until there is distilled water into water canister 14.
  • hot-air generator 7 also has a water drain circuit for draining surplus of distilled water from water canister 14.
  • Water drain circuit comprises a manually-removable waste-water tank (not shown) housed in easily removable manner inside casing 2, preferably, though not necessarily, near the top of the casing; and a second electric pump (not shown) which, on command, sucks the distilled water from water canister 14 and feeds it to the waste-water tank.
  • the second electric pump is switched on in known manner by a floater (not shown) housed in water canister 14, when the water-level in water canister 14 exceeds a given upper threshold value.
  • steam exhaust manifold 17 may connect the outlet of electric boiler 15 directly to drying tub 3 and laundry drum 5, bypassing the end portion of recirculating conduit 8.
  • laundry drier 1 may not have the laundry drying tub or chamber 3, and laundry drum 5 may be mounted in axially rotating manner directly inside casing 2.
  • laundry drum 5 may be mounted in axially rotating manner directly inside casing 2.
  • only end wall 5a of laundry drum 5 is perforated or permeable to air, and the exhaust end of recirculating conduit 8 is coupled in airtight manner directly to end wall 5a.
  • the front opening of laundry drum 5 directly faces laundry loading and unloading opening 2a in the front face of casing 2, and door 3, when placed in its rest position, seals in airtight manner directly the front opening of laundry drum 5.
  • hot-air generator 7 may be provided also with a water level sensor (not shown) which is housed inside the airtight container of electric boiler 15 for determining the instant water-level inside the airtight container, and central control unit 12 calculates the instant flow rate of the low-pressure steam coming out from electric boiler 15 according to the signals received form said water level sensor (not shown).
  • a water level sensor not shown

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Centrifugal Separators (AREA)
  • Detergent Compositions (AREA)

Claims (10)

  1. Haushaltswäschetrockner (1), umfassend ein kastenförmiges Außengehäuse (2) und in diesem einen Wäschebehälter (3, 5) zum Aufnehmen der zu trocknenden Wäsche, sowie einen Heißlufterzeuger (7), um im Wäschebehälter (3, 5) einen Heißluftstrom umzuwälzen; wobei der Heißlufterzeuger (7) umfasst: eine Luftrückführleitung (8), die an beiden Enden mit dem Wäschebehälter (3, 5) verbunden ist, und einen Wärmetauscher (10), der entlang der Rückführleitung (8) angeordnet ist, um den Luftstrom (f) aus dem Wäschebehälter (3, 5) zu kühlen und die überschüssige Feuchtigkeit in dem Luftstrom (f) zu kondensieren; wobei der Wärmetauscher (10) mit einem Wasserbehälter (14) versehen ist, der das flüssige destillierte Wasser sammelt, das in dem Wärmetauscher (10) erzeugt wurde, indem die überschüssige Feuchtigkeit in dem Luftstrom (f) aus dem Wäschebehälter (3, 5) kondensiert wurde; wobei der Heißlufterzeuger (7) darüber hinaus umfasst:
    - einen elektrischen Boiler (15), der über dem Wärmetauscher (10) angeordnet ist und geeignet ist, Wasser aufzunehmen und das Wasser in Dampf umzuwandeln;
    - eine elektrische Pumpe (16), die über dem Wasserbehälter (14) angeordnet ist und geeignet ist, auf Befehl das destillierte Wasser vom Wasserbehälter (14) aufzusaugen und es in den elektrischen Boiler (15) zu leiten;
    - ein Dampfausstoßsammelrohr (17), um den aus dem elektrischen Boiler (15) kommenden Dampf in den Wäschebehälter (3, 5) zu leiten; und
    - eine zentrale Steuereinheit (12), die den Durchsatz des aus dem elektrischen Boiler (15) kommenden Dampfes festlegt und die elektrische Pumpe (16) derart steuert, dass der Durchsatz des Wassers, das dem elektrischen Boiler (15) zugeführt wird, fast gleich dem Durchsatz des Dampfes ist, der aus dem elektrischen Boiler (15) kommt,
    dadurch gekennzeichnet, dass der Heißlufterzeuger (7) auch mit einem Wasserstandsensor versehen ist, der den Wasserstand im elektrischen Boiler (15) bestimmt, und dass die zentrale Steuereinheit (12) in Abhängigkeit von den Signalen, die von dem Wasserstandsensor eingehen, den Durchsatz des Dampfes berechnet, der aus dem elektrischen Boiler (15) kommt.
  2. Haushaltswäschetrockner nach Anspruch 1, dadurch gekennzeichnet, dass der elektrische Boiler (15) ein druckbeaufschlagter elektrischer Instantboiler (15) ist.
  3. Haushaltswäschetrockner nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die elektrische Pumpe (16) eine volumetrische Pumpe (16) ist, die so bemessen ist, dass sie Wasser vom Wasserbehälter (14) über eine Aufnahmeleitung (18) ansaugt, die den Einlass der elektrischen Pumpe (16) mit dem Boden des Wasserbehälters (14) verbindet.
  4. Haushaltswäschetrockner nach Anspruch 3, dadurch gekennzeichnet, dass die elektrische Pumpe (16) eine Membranpumpe ist.
  5. Haushaltswäschetrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die elektrische Pumpe (16) über dem Wärmetauscher (10) angeordnet ist.
  6. Haushaltswäschetrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zentrale Steuereinheit (12) den Durchsatz des aus dem elektrischen Boiler (15) kommenden Dampfes in Abhängigkeit von der elektrischen Energie, die dem elektrischen Boiler (15) zugeführt wird, und von der Temperatur in dem elektrischen Boiler (15) berechnet.
  7. Haushaltswäschetrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Heißlufterzeuger (7) auch erste Heizmittel (11) umfasst, die entlang der Rückführleitung (8) angeordnet sind, um auf Befehl den Luftstrom (f) zu erwärmen, der aus dem Wärmetauscher (10) und zurück in den Wäschebehälter (3, 5) strömt.
  8. Haushaltswäschetrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Wärmetauscher (10) am Boden des kastenförmigen Außengehäuses (2) angeordnet ist und dass der Wasserbehälter (14) im Boden des Wärmetauschers (10) angeordnet ist.
  9. Haushaltswäschetrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Wäschebehälter (3, 5) eine rotierende Trommel (5) zum Aufnehmen der zu trocknenden Wäsche umfasst, die um ihre Längsachse (L) drehbar in dem kastenförmigen Gehäuse (2) montiert ist; wobei der Wäschetrockner auch mit einer Motoreinheit (6) versehen ist, um die Trommel (5) auf Befehl um ihre Längsachse zu drehen (L).
  10. Haushaltswäschetrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Dampfausstoßsammelrohr (17) den elektrischen Boiler (15) mit der Rückführleitung (8) verbindet, um den in dem elektrischen Boiler (15) erzeugten Dampf über den Endteil der Rückführleitung (8) in den Wäschebehälter (3, 5) einzuspeisen.
EP07112495A 2007-07-13 2007-07-13 Wäschetrockner für den Haushalt Not-in-force EP2014821B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE602007010918T DE602007010918D1 (de) 2007-07-13 2007-07-13 Wäschetrockner für den Haushalt
ES07112495T ES2356141T3 (es) 2007-07-13 2007-07-13 Secadora doméstica de ropa.
AT07112495T ATE490366T1 (de) 2007-07-13 2007-07-13 Wäschetrockner für den haushalt
PL07112495T PL2014821T3 (pl) 2007-07-13 2007-07-13 Domowa suszarka
EP07112495A EP2014821B1 (de) 2007-07-13 2007-07-13 Wäschetrockner für den Haushalt
RU2010105035/12A RU2501897C2 (ru) 2007-07-13 2008-07-11 Бытовая сушильная машина для белья
PCT/EP2008/005699 WO2009010245A1 (en) 2007-07-13 2008-07-11 Home laundry drier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07112495A EP2014821B1 (de) 2007-07-13 2007-07-13 Wäschetrockner für den Haushalt

Publications (2)

Publication Number Publication Date
EP2014821A1 EP2014821A1 (de) 2009-01-14
EP2014821B1 true EP2014821B1 (de) 2010-12-01

Family

ID=39023475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07112495A Not-in-force EP2014821B1 (de) 2007-07-13 2007-07-13 Wäschetrockner für den Haushalt

Country Status (7)

Country Link
EP (1) EP2014821B1 (de)
AT (1) ATE490366T1 (de)
DE (1) DE602007010918D1 (de)
ES (1) ES2356141T3 (de)
PL (1) PL2014821T3 (de)
RU (1) RU2501897C2 (de)
WO (1) WO2009010245A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101414625B1 (ko) * 2007-11-21 2014-07-03 엘지전자 주식회사 건조기

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869815A (en) 1972-06-29 1975-03-11 Cissell Mfg Garment finishing apparatus
US4519145A (en) 1984-03-12 1985-05-28 Magic Chef, Inc. Electrostatic and moisture control system for automatic clothes dryers
SU1418366A1 (ru) * 1986-12-30 1988-08-23 Московский технологический институт Сушильна машина дл текстильных изделий
DE10260151A1 (de) 2002-12-20 2004-07-01 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrockner und Verfahren zur Geruchsentfernung aus Textilien
EP1441059B1 (de) 2003-01-25 2012-01-18 Electrolux Home Products Corporation N.V. Verfahren zur Behandlung von Textilien in einem Haushaltswäschetrockner

Also Published As

Publication number Publication date
PL2014821T3 (pl) 2011-07-29
DE602007010918D1 (de) 2011-01-13
EP2014821A1 (de) 2009-01-14
RU2010105035A (ru) 2011-08-20
WO2009010245A1 (en) 2009-01-22
RU2501897C2 (ru) 2013-12-20
ES2356141T3 (es) 2011-04-05
ATE490366T1 (de) 2010-12-15

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