EP2042646A1 - Haushaltswäschetrockner - Google Patents

Haushaltswäschetrockner Download PDF

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Publication number
EP2042646A1
EP2042646A1 EP07117390A EP07117390A EP2042646A1 EP 2042646 A1 EP2042646 A1 EP 2042646A1 EP 07117390 A EP07117390 A EP 07117390A EP 07117390 A EP07117390 A EP 07117390A EP 2042646 A1 EP2042646 A1 EP 2042646A1
Authority
EP
European Patent Office
Prior art keywords
water
air
heat
airflow
guide cartridge
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Withdrawn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
EP07117390A
Other languages
English (en)
French (fr)
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
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP07117390A priority Critical patent/EP2042646A1/de
Priority to RU2008138463/12A priority patent/RU2446239C2/ru
Publication of EP2042646A1 publication Critical patent/EP2042646A1/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Withdrawn legal-status Critical Current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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/22—Lint collecting 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

Definitions

  • the present invention relates to a home laundry drier.
  • the present invention relates to a rotary-drum home laundry drier with steam generator, to which the following description refers purely by way of example.
  • present rotary-drum home laundry driers comprise a substantially parallelepiped-shaped outer box casing; a cylindrical laundry drying 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 drying drum; and an electric motor for rotating the drying drum about its longitudinal axis inside the casing.
  • Rotary-drum home laundry driers of the above type also comprise a closed-circuit, hot-air generator designed to circulate inside the drying drum a stream of hot air with a low moisture content, and which flows through the drying 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 drying drum, on opposite sides of the latter; and an electric centrifugal fan or similar located along recirculating conduit to produce, inside the recirculating conduit, an airflow which flows through the drying drum.
  • the air/air heat exchanger provides for rapidly cooling the airflow from the drying 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 drying 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 drying 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 drying drum to eliminate or at least greatly reduce wrinkling of the fabrics produced during the drying cycle.
  • Currently used steam generators have substantially the same structure as ordinary irons with a separated boiler, and comprise a demineralized-water reservoir housed in the highest part of the household appliance casing for easy manual refill with distilled/demineralized water; and an electric steam generating boiler normally located below the demineralized-water reservoir and connected to it by a suitable connecting pipe. Water flows by gravity into the electric boiler under control of an electrovalve or similar placed along the connecting pipe.
  • the demineralized-water reservoir of the steam generator is connected to the same electric pump which sucks up the distilled water from the bottom of the heat exchanger, so as to receive part of the distilled water drawn from the heat exchanger.
  • a home laundry drier as claimed in Claim 1 and preferably, though not necessarily, in any one of the dependent Claims.
  • number 1 indicates as a whole a home laundry drier comprising a preferably, though not necessarily, parallelepiped-shaped outer box casing 2; a preferably, though not necessarily, cylindrical bell-shaped laundry drying drum 3 for housing the laundry to be dried, and which is fixed in axially rotating manner inside casing 2, directly facing a laundry loading and unloading opening 2a formed in the front face of casing 2; and a door 4 hinged to the front face of casing 2 to rotate to and from a rest position closing opening 2a in the front face to seal the laundry drying drum 3.
  • drying drum 3 rests horizontally inside casing 2 on a number of horizontal supporting rollers 5 which are fitted to casing 2 to let drying drum 3 freely rotate about its longitudinal axis A.
  • laundry drier 1 also comprises an electric motor 6 for rotating, on command, drying drum 3 about its longitudinal axis A inside casing 2; and a closed-circuit, hot-air generator 7 housed inside casing 2 and designed to circulate through drying drum 3 a stream of hot air having a low moisture level, and which flows over and rapidly dries the laundry inside drum 3.
  • closed-circuit, hot-air generator 7 provides for gradually drawing air from drying drum 3; extracting surplus moisture from the hot air drawn from drying drum 3; heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from drying drum 3; and feeding the heated, dehumidified air back into drying drum 3, where it flows over, to rapidly dry, the laundry inside the drum.
  • hot-air generator 7 provides for continually dehumidifying and heating the air circulating inside drum 5 to rapidly dry the laundry inside the drum, and substantially comprises:
  • the intake end of recirculating conduit 8 is integrated in door 4, and is faced to the front opening of drying drum 3; the end wall 3a of drying drum 3 is perforated, or at any rate permeable to air, to permit air entry into drum 3; and the exhaust end of recirculating conduit 8 is coupled in airtight manner directly to the end wall 3a of drying drum 3.
  • electric centrifugal fan 9 it is structured to produce an airflow f flowing, along recirculating conduit 8, from the intake end of recirculating conduit 8, i.e door 4, to the exhaust end of recirculating conduit 8, i.e. perforated end wall 3a of drying drum 3.
  • heat exchanger 10 is located on the bottom of casing 2 and comprises a preferably, though not necessarily, parallelepiped-shaped boxlike container 12 housed inside casing 2 along recirculating conduit 8; and a heat-conductive air-guide cartridge 13 inserted in easy-removable manner into boxlike container 12 to fill up the central section of the container, and to form inside container 12 two separate airtight compartments 12a and 12b each of which is in direct communication with a respective portion of recirculating conduit 8.
  • Airtight compartment 12a is in direct communication with the portion of recirculating conduit 8 ending in door 4; airtight compartment 12b is in direct communication with the portion of recirculating conduit 8 ending in front of the perforated end wall 3a of drying drum 3; boxlike container 12 is designed to let the cold airflow w from outside casing 2 circulate through the central section of boxlike container 12 to cool down the air-guide cartridge 13, without entering in any of the two airtight compartments 12a and 12b of container 12; and air-guide cartridge 13 is designed to channel the airflow f from airtight compartment 12a directly to airtight compartment 12b, and to let the airflow f rapidly cool by releasing heat to the cold airflow w while flowing through air-guide cartridge 13.
  • boxlike container 12 is housed inside casing 2 on the bottom of the latter, and communicates with the outside via an first opening 2b formed in the front face of casing 2; laundry drier 1 is provided with a second door 14 hinged to the front face of casing 2 to rotate to and from a rest position closing opening 2b in the front face of casing 2 to seal in airtight manner boxlike container 12; and heat-conductive air-guide cartridge 13 is extractable from boxlike container 12 in a drawer-like manner through opening 2b.
  • the lateral wall of boxlike container 12 is also provided with a second throughout opening 12c which is located in the central section of boxlike container 12 to let the cold airflow w from outside casing 2 circulate through the central section of boxlike container 12 and all around air-guide cartridge 13, without entering in any of the two airtight compartments 12a and 12b of container 12.
  • heat-conductive air-guide cartridge 13 is substantially parallelepiped-shaped for being extractable from the central section of boxlike container 12 in drawer-like manner, and consist of two plate elements 15 placed one in front of the other along the longitudinal axis of the air-guide cartridge 13 to form the two basis of the parallelepiped, and of a number of rectilinear pipes 16 extending between the two plate elements 15, one next to the other and parallel to the longitudinal axis of air-guide cartridge 13.
  • Each of the two plate elements 15 is shaped almost complementary to the cross section of boxlike container 12, and is designed to rest against a respective annular collar 17 protruding inside boxlike container 12 so as to close the latter in airtight manner and form a respective airtight compartment 12a, 12b of the container.
  • heat-conductive air-guide cartridge 13 is also provided with a condensed-water canister 18 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.
  • condensed-water canister 18 consists of a substantially rectangular-shaped tub 18 jutting out horizontally inside airtight compartment 12b of container 12 from the plate element 15 delimiting said airtight compartment 12b.
  • heat-conductive air-guide cartridge 13 also features filtering means 19 designed to keep fluff and/or lint particles within the air-guide cartridge 13, so as to be manually removed during scheduled cleaning and sanitization of air-guide cartridge 13.
  • filtering means 19 consist of one or more strips 19 of Velcro-like material laying on the bottom of tub 18, between the plate element 15 delimiting the airtight compartment 12b and a through hole 18a realized on the bottom of tub 18 for draining the liquid distilled water produced when the drier is running.
  • Each strip 19 of Velcro-like material is provided with a multitude of preferably, though not necessarily, hook-shaped pins projecting perpendicularly to the bottom surface of tub 18 so as to prevent fluff and/or lint particles to reach the through hole 18a and leave condensed-water canister 18.
  • strips 19 of Velcro-like material may be replaced by a plug-shaped net filter or similar covering the inlet of the through hole 18a realized on the bottom of tub 18, so as to prevent fluff and/or lint particles to leave condensed-water canister 18.
  • lint filtering means 19 keep fluff and/or lint particles on the bottom of condensed-water canister 18.
  • hot-air generator 7 is also provided with a water drain circuit 20 for draining away the condensed water from canister 18.
  • water drain circuit 20 comprises a high-capacity manually-removable waste-water tank 21 housed in easily removable manner inside casing 2, preferably, though not necessarily, near the top of the casing; and an electric pump 22 which, on command, sucks the distilled water from a water sump 24 located on the bottom of boxlike container 12, inside airtight compartment 12b and aligned bellow the through hole 18a of condensed-water canister 18, and feeds said water to waste-water tank 21 via a suitable connecting pipe 25.
  • electric pump 22 is a submerged electric pump 22 located at the bottom of water sump 24 and it is switched on in known manner when the water level in water sump 24 exceeds a given upper threshold value.
  • laundry drier 1 comprises a pressurized-steam generator 26, which, on command, produces and feeds a jet of steam into drying drum 3 to eliminate or at least greatly reduce wrinkling of the fabrics produced during the drying cycle.
  • pressurized-steam generator 26 comprises an instant in-pressure electric tubular vaporizer 27 designed to receive a given quantity of water and immediately convert it into a stream of low-pressure steam whose pressure is slightly higher than external pressure; a steam injection nozzle 28 located inside casing 2, in the collar connecting the front opening of drying drum 3 to opening 2a in the front face of casing 2, and structured for projecting jets of low-pressure steam directly inside drying drum 3; and a steam exhaust manifold 29 connecting the outlet of tubular vaporizer 27 to the steam injection nozzle 28 for feeding the low-pressure steam produced by tubular vaporizer 27 directly to nozzle 28.
  • pressurized-steam generator 26 is provided with a demineralized-water reservoir 30 which is housed inside casing 2, over tubular vaporizer 27, and is connected to tubular vaporizer 27 by a connecting pipe 31; and with an electrovalve 32 or similar which is located along connecting pipe 31 to control the outflow of water from water reservoir 30 to tubular vaporizer 27.
  • demineralized-water reservoir 30 of pressurized-steam generator 26 is connected to water drain circuit 20 of hot-air generator 7, to receive part of the condensed water drained from of condensed-water canister 18.
  • water drain circuit 20 feeds to demineralized-water reservoir 30 condensed water without fluff and/or lint particles, because air-guide cartridge 13 includes lint filtering means 19 designed to keep fluff and/or lint particles within condensed-water canister 18.
  • water reservoir 29 is directly connected to connecting pipe 25 of water drain circuit 20 via a T-shaped joint.
  • laundry drier 1 Like any other recently marketed electric household appliance, laundry drier 1 finally comprises an electronic central control unit 33, which controls electric motor 6, heat exchanger 10 - or, rather, the electric cooling fan (not shown) which generates the cold airflow w through the central section of boxlike container 12 -, and heater 11 in predetermined manner, as memorized inside it, to perform the user-selected drying cycle.
  • an electronic central control unit 33 which controls electric motor 6, heat exchanger 10 - or, rather, the electric cooling fan (not shown) which generates the cold airflow w through the central section of boxlike container 12 -, and heater 11 in predetermined manner, as memorized inside it, to perform the user-selected drying cycle.
  • control unit 33 also controls steam generator 26 (i.e. electric tubular vaporizer 27 and electrovalve 32) in predetermined manner, as memorized inside it, to feed jets of low-pressure steam into drying drum 3 when required by the user-selected drying cycle.
  • steam generator 26 i.e. electric tubular vaporizer 27 and electrovalve 32
  • Realizing lint filtering means 19 in one piece with air-guide cartridge 13 has lots of advantages: first and foremost, the possibility to clean and sanitize both heat exchanger 10 and lint filtering means 19 in single operation, thus relieving the user from scheduled removal and cleaning of the steam generator lint filter.
  • steam injection nozzle 28 may be placed in front of the perforated end wall 3a of drying drum 3, outside of the drum, in the exhaust end of recirculating conduit 8, and may be structured for projecting jets of low-pressure steam through end wall 3a, inside drying drum 3.
  • steam injection nozzle 28 may be housed in the exhaust end of recirculating conduit 8, in front of the perforated end wall 3a of drying drum 3.
EP07117390A 2007-09-27 2007-09-27 Haushaltswäschetrockner Withdrawn EP2042646A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07117390A EP2042646A1 (de) 2007-09-27 2007-09-27 Haushaltswäschetrockner
RU2008138463/12A RU2446239C2 (ru) 2007-09-27 2008-09-26 Бытовая сушилка для белья

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07117390A EP2042646A1 (de) 2007-09-27 2007-09-27 Haushaltswäschetrockner

Publications (1)

Publication Number Publication Date
EP2042646A1 true EP2042646A1 (de) 2009-04-01

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Family Applications (1)

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EP07117390A Withdrawn EP2042646A1 (de) 2007-09-27 2007-09-27 Haushaltswäschetrockner

Country Status (2)

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EP (1) EP2042646A1 (de)
RU (1) RU2446239C2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011042345A1 (en) * 2009-10-08 2011-04-14 Arcelik Anonim Sirketi A laundry dryer having a self cleaning lint filter
EP2458066A1 (de) * 2010-11-26 2012-05-30 Whirlpool Corporation Trockner mit geschlossenem Kreislauf
WO2014184707A3 (en) * 2013-05-16 2015-01-29 Gorenje Gospodinjski Aparati, D.D. Filter unit
EP3118365A1 (de) * 2015-07-15 2017-01-18 Miele & Cie. KG Wäschetrockner
EP3118367A1 (de) * 2015-07-15 2017-01-18 Miele & Cie. KG Wäschetrockner
EP3819423A1 (de) * 2019-11-07 2021-05-12 Whirlpool Corporation Verfahren zum entfernen von wärme aus einem wäschetrocknersystem an der aussenseite des gehäuses

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477554A1 (de) * 1990-09-24 1992-04-01 Bosch-Siemens HausgerÀ¤te GmbH Haushalt-Wäschetrockner mit einem Kondensator
GB2258720A (en) * 1991-08-15 1993-02-17 Creda Ltd Tumble dryer
DE29608272U1 (de) * 1995-05-08 1996-08-08 Electrolux Zanussi Elettrodome Kombinierte Maschine zum Waschen und Trocknen von Wäsche
WO2005121437A1 (en) * 2004-06-05 2005-12-22 Lg Electronics, Inc. A lint filter assembly of laundry dryer
DE102005035652A1 (de) * 2005-07-29 2007-02-01 BSH Bosch und Siemens Hausgeräte GmbH Wärmetauschvorrichtung für einen Wäschetrockner

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5706588A (en) * 1996-08-13 1998-01-13 General Electric Company Device and method for separating lint particles in a clothes dryer
DE19705616A1 (de) * 1997-02-14 1998-08-20 Miele & Cie Flusenfiltereinrichtung für einen Wäschetrockner
DE10029428A1 (de) * 2000-06-15 2002-01-03 Bsh Bosch Siemens Hausgeraete Luftführendes Haushaltsgerät mit waschbarem Filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477554A1 (de) * 1990-09-24 1992-04-01 Bosch-Siemens HausgerÀ¤te GmbH Haushalt-Wäschetrockner mit einem Kondensator
GB2258720A (en) * 1991-08-15 1993-02-17 Creda Ltd Tumble dryer
DE29608272U1 (de) * 1995-05-08 1996-08-08 Electrolux Zanussi Elettrodome Kombinierte Maschine zum Waschen und Trocknen von Wäsche
WO2005121437A1 (en) * 2004-06-05 2005-12-22 Lg Electronics, Inc. A lint filter assembly of laundry dryer
DE102005035652A1 (de) * 2005-07-29 2007-02-01 BSH Bosch und Siemens Hausgeräte GmbH Wärmetauschvorrichtung für einen Wäschetrockner

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011042345A1 (en) * 2009-10-08 2011-04-14 Arcelik Anonim Sirketi A laundry dryer having a self cleaning lint filter
EP2458066A1 (de) * 2010-11-26 2012-05-30 Whirlpool Corporation Trockner mit geschlossenem Kreislauf
WO2014184707A3 (en) * 2013-05-16 2015-01-29 Gorenje Gospodinjski Aparati, D.D. Filter unit
EP3118365A1 (de) * 2015-07-15 2017-01-18 Miele & Cie. KG Wäschetrockner
EP3118367A1 (de) * 2015-07-15 2017-01-18 Miele & Cie. KG Wäschetrockner
EP3819423A1 (de) * 2019-11-07 2021-05-12 Whirlpool Corporation Verfahren zum entfernen von wärme aus einem wäschetrocknersystem an der aussenseite des gehäuses
US11851807B2 (en) 2019-11-07 2023-12-26 Whirlpool Corporation Method of removing heat from a clothes tumbling system on the outside of the cabinet

Also Published As

Publication number Publication date
RU2008138463A (ru) 2010-04-10
RU2446239C2 (ru) 2012-03-27

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