EP0328250A1 - Trommeltrockner - Google Patents

Trommeltrockner Download PDF

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Publication number
EP0328250A1
EP0328250A1 EP89300343A EP89300343A EP0328250A1 EP 0328250 A1 EP0328250 A1 EP 0328250A1 EP 89300343 A EP89300343 A EP 89300343A EP 89300343 A EP89300343 A EP 89300343A EP 0328250 A1 EP0328250 A1 EP 0328250A1
Authority
EP
European Patent Office
Prior art keywords
fan
drum
motor
air flow
tumble drier
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Withdrawn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
EP89300343A
Other languages
English (en)
French (fr)
Inventor
Keith Rollason
Derek John Watts
John Garfield Davies
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.)
Creda Ltd
Original Assignee
Creda Ltd
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 Creda Ltd filed Critical Creda Ltd
Publication of EP0328250A1 publication Critical patent/EP0328250A1/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Withdrawn legal-status Critical Current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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • D06F58/08—Driving 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/34—Humidity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • 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
    • D06F58/30—Drying processes 

Definitions

  • This invention relates to tumble driers.
  • the invention provides a tumble drier which comprises a rotatable drum, a fan in a housing for producing an air flow through the drum, a motor for driving both the drum and the fan, the output shaft of the motor being arranged to rotate alternately in a forward direction and in a reverse direction, the fan and the housing being such that the air flow delivered by the fan is greater in one direction of rotation than in the opposite direction, and the arrangement being such that the periods of rotation of the motor in the direction corresponding to greater air flow are longer than the periods of reverse rotation.
  • the ratio of the periods of rotation in the direction corresponding to greater air flow to the periods in the direction corresponding to lesser air flow is greater than 2:1, preferably greater than 4:1, and preferably greater than 8:1.
  • a heat exchanger through which the air flow through the drum passes in use before being re-circulated to the drum; the use of an efficient fan with a tangential outlet is particularly important in such a closed circuit system.
  • the fan and motor are arranged laterally with respect to the heat exchanger, which is preferably removable longitudinally through an opening in the front of the drier.
  • a second fan also driven by the motor arranged to pass cooling air from the atmosphere through the heat exchanger, and the motor may be arranged between the two fans.
  • a container may be provided for receiving water condensed out of the re-circulating path, and a pad underneath the container which is resiliently urged upwards against the containers may co-operate with a switch linked to the upper surface of the container so that the switch operates when the weight of water in the container is sufficient to depress the pad by a predetermined amount. In this way, the machine can have an automatic cut-out when such a container for condensate becomes full.
  • the tumble drier comprises a rotatable drum 1 housed in a cabinet 2, the drum being mounted on a bearing 3 at the front of the machine and a bearing (not shown) at the rear of the machine.
  • a load is inserted into the tub through a door 4.
  • the drum 1 is rotated by a motor 5 by a drive belt 6.
  • the load is dried by means of an air flow heated by a heating element (not shown) in duct 7, which air flow circulates through the drum and through a condenser in the form of a heat exchanger indicated generally by the reference numeral 8 in a closed loop (see arrows 9 to 12).
  • the heat exchanger is cooled by a flow of atmospheric air (arrows 13, 14). Condensed moisture is collected in container 15.
  • the motor 5 has output shafts at each end.
  • the forward shaft 16 drives a fan 17 in a housing 18 in order to impel air through the drum.
  • the rear shaft 19 drives a fan 20 in a housing 21 in order to impel atmospheric cooling air through the heat exchanger.
  • the co-axially arranged motor and fans lie laterally with respect to the heat exchanger 8.
  • the fan 17 consists of a rotatable fan wheel i.e. a wheel bearing curved blades 22 which is rotatable in a volute housing i.e. the outer periphery of the housing is in the shape of a scroll so that the clearance between the fan and the housing gradually increases towards the outlet 23, which is tangential to the fan wheel.
  • the inlet is axially into the centre of the fan wheel.
  • Such a fan has a high efficiency, i.e. a high air throughput, when the fan is rotated in the direction of the arrow, but a low throughput when the fan is rotated in the opposite direction.
  • the fan 20 and its housing are identical to the fan 17 and its housing.
  • the heat exchanger 8 consists of a number of flat tubes 24 (through which the re-circulating air passes) which run longitudinally along the heat exchanger. At the front and rear ends the tubes are set into plastics panels 25, 26, which block the spaces between the tubes, and top and bottom panel 27, 28 have offset slots in them (the top one being shown at 38) for feeding the cooling air across the condenser tubes.
  • the heat exchanger 38 is housed in a chamber 30, with which the housing 18 communicates for the inlet to the heat exchanger (arrow 9).
  • the re-circulating air flow is driven by the fan 17 through the tubes 24 and leaves the rear end 31 of the chamber (arrow 10), and enters the duct 7 which contains the heating element.
  • the now heated re-­circulating air enters the rear of the drum through a slot 32 and, after flowing through the drum, passes along a tapering duct 33 (arrow 12) and enters the fan housing 17 axially through an aperture 34.
  • the heated and moist air is driven into the chamber 30 again.
  • the front panel 35 of the chamber 30 can be opened (and a similar panel on the front of the cabinet 2 may be opened) in order to enable the heat exchanger 8 to be withdrawn longitudinally from the cabinet 14. Particles of fibre and of lint filters (not shown) will be entrained in the re-­circulating air flow, and the heat exchanger should be periodically removed and cleaned to prevent it becoming clogged.
  • the cooling of the heat exchanger is effected by the fan 20. Cooling ambient air (arrow 13) from the atmosphere is drawn axially through inlet 35a into aperture 36 in the fan housing 21 and enters chamber 30 through slot 37 in the underside of the chamber. The air passes over the heat exchanger tubes 24 and leaves the chamber through slot 38 (arrow 14), which is offset relative to the slot 37 in order to cause turbulence in the cooling air flow and therefore promote better heat transfer. The air which has now been heated re-enters the atmosphere.
  • the side-by-side arrangement of the heat exchanger 8 on the one hand and the motor 5 and co-axial fans 17 and 20 on the other hand permits: the use of a single motor for the drum and two fans; an axial air enter into both fan housings; and accessibility of the heat exchanger from the front of the machine.
  • An electronic circuit for periodically reversing the direction of rotation of the motor. Instead of providing equal periods of forward and reverse rotation as hitherto, the motor rotates the drums and fan in a repetitive cycle consisting of a forward rotation of five minutes and a reverse rotation of half a minute. In this way, the fans are operating in an efficient manner for around 90% of the time and in an inefficient manner only for around 10% of the time. Overall the air flow through the drum is effective for drying even though the air flow is subject to the impedance created by the condenser and the ducting of the re-circulating loop. Equally, the short reversal is effective for preventing tangling of the clothes, in the same way as equal length reversals were hitherto.
  • the moisture from the re-­circulating air leaving the drum condenses and runs from drains 39, 40 to the pump 40a (figure 1) which is powered by its own electric motor, and which pumps the liquid to a container 15.
  • the container is withdrawn by the user periodically to empty it and has means to prevent it being over filled.
  • container 15 when fully inserted, rests on spring-loaded pressure pad 42.
  • An operating lever 43 pivoted at 44 passes through a slot 45 in support panel 46.
  • One end rests on the upper surface of the container 15.
  • the other end rests on a further level 47 which, when depressed, operates a switch 48 which switches on the pump motor and the main motor as well.
  • the weight is such that the pressure pad 42 is depressed by a predetermined amount.
  • the end of the lever resting on the container is depressed and the other end raised, so that the switch 48 operates.
  • the user withdraws the container and empties it, and the switch remains in the off position. Only when the empty container has been re-inserted will the levers set the switch to the position in which the machine can re-­start.
  • the motor 5 is a two pole capacitor start and run induction motor, instead it could be a relay start motor, or indeed a four pole motor could be used. Equally, different forward and reverse periods in the reversing cycle of the motor are possible: thus, the ratio of forward to reverse for each cylinder could be from 5:1 to 20:1, and the cycle time could be between three minutes and ten minutes. Also, the points of entry to and exit from the heat exchanger could be changed. If desired the heat exchanges could be water cooled instead of air cooled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP89300343A 1988-01-13 1989-01-13 Trommeltrockner Withdrawn EP0328250A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8800727A GB2214623B (en) 1988-01-13 1988-01-13 Tumble driers
GB8800727 1988-01-13

Publications (1)

Publication Number Publication Date
EP0328250A1 true EP0328250A1 (de) 1989-08-16

Family

ID=10629898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89300343A Withdrawn EP0328250A1 (de) 1988-01-13 1989-01-13 Trommeltrockner

Country Status (2)

Country Link
EP (1) EP0328250A1 (de)
GB (1) GB2214623B (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230330A (en) * 1989-04-10 1990-10-17 Balay Sa Drying device for washing machines
WO1991003591A1 (de) * 1989-08-30 1991-03-21 Albrecht Wulff Trocknungsverfahren und wäschetrockner zur durchführung des verfahrens
EP0424781A2 (de) * 1989-10-24 1991-05-02 Bosch-Siemens HausgerÀ¤te GmbH Haushalt-Wäschetrockner
WO2000047810A1 (de) * 1999-02-08 2000-08-17 Miele & Cie. Gmbh & Co. Kondensationswäschetrockner
EP1108812A1 (de) * 1999-12-13 2001-06-20 BSH Bosch und Siemens Hausgeräte GmbH Haushalt-Kondensations-Wäschetrockner und Verfahren zu seinem Betrieb
BE1015494A3 (fr) * 2001-12-07 2005-05-03 Hanning Elektro Werke Seche-linge.
EP1541744A1 (de) * 2003-12-11 2005-06-15 Electrolux Home Products Corporation N.V. Haushalt-Wäschetrockner mit verbessertem Kondensator
WO2006114802A1 (en) * 2005-04-27 2006-11-02 Ln2 S.R.L. A forced air circulation system for drying machines and washing/drying machines, particularly for domestic use.
WO2006122838A1 (de) * 2005-05-20 2006-11-23 BSH Bosch und Siemens Hausgeräte GmbH Haushaltgerät zur pflege von wäschestücken insbesondere wäschetrockner
WO2008052906A2 (de) * 2006-10-31 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum betreiben eines hausgeräts zur pflege von wäschestücken
EP2366827A1 (de) * 2010-03-18 2011-09-21 Askoll Holding S.r.l. Gebläse- und Antriebseinheit für einen Kondensations-Wäschetrockner und Kondensations-Wäschetrockner mit einer solchen Einheit
EP2392725A3 (de) * 2011-09-12 2012-04-25 V-Zug AG Wäschetrockner mit Reversierbetrieb
DE102013108061A1 (de) 2013-07-29 2015-01-29 Miele & Cie. Kg Wäschetrockner mit einem Einmotorenantrieb für die Wäschetrommel und das Prozessluftgebläse

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961776A (en) * 1958-09-26 1960-11-29 Gen Electric Clothes dryer with reversible blower
US3309783A (en) * 1964-03-09 1967-03-21 Gen Electric Clothes drying machine having reversing drum drive means
GB1062258A (en) * 1963-10-01 1967-03-22 Philco Corp Improvements in or relating to domestic dryers for laundry or the like
DE1585938A1 (de) * 1963-01-18 1969-09-18 Siemens Elektrogeraete Gmbh Nach dem Trommelprinzip arbeitender Waeschetrockner
GB2051330A (en) * 1979-06-15 1981-01-14 Philips Electronic Associated Clothes dryer
GB2058316A (en) * 1979-08-23 1981-04-08 Tokyo Shibaura Electric Co Dryer
GB2089952A (en) * 1980-10-21 1982-06-30 Bosch Siemens Hausgeraete Laundry Drier
GB2107839A (en) * 1981-09-16 1983-05-05 Tokyo Shibaura Electric Co Drying apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514867A (en) * 1968-06-21 1970-06-02 Blackstone Corp Clothes dryers with reversing drum
GB1416882A (en) * 1972-03-01 1975-12-10 Hotpoint Ltd Tumbler type dryers
GB1416881A (en) * 1972-03-01 1975-12-10 Hotpoint Ltd Tumbler type dryers

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961776A (en) * 1958-09-26 1960-11-29 Gen Electric Clothes dryer with reversible blower
DE1585938A1 (de) * 1963-01-18 1969-09-18 Siemens Elektrogeraete Gmbh Nach dem Trommelprinzip arbeitender Waeschetrockner
GB1062258A (en) * 1963-10-01 1967-03-22 Philco Corp Improvements in or relating to domestic dryers for laundry or the like
US3309783A (en) * 1964-03-09 1967-03-21 Gen Electric Clothes drying machine having reversing drum drive means
GB2051330A (en) * 1979-06-15 1981-01-14 Philips Electronic Associated Clothes dryer
GB2058316A (en) * 1979-08-23 1981-04-08 Tokyo Shibaura Electric Co Dryer
GB2089952A (en) * 1980-10-21 1982-06-30 Bosch Siemens Hausgeraete Laundry Drier
GB2107839A (en) * 1981-09-16 1983-05-05 Tokyo Shibaura Electric Co Drying apparatus

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230330A (en) * 1989-04-10 1990-10-17 Balay Sa Drying device for washing machines
GB2230330B (en) * 1989-04-10 1993-04-07 Balay Sa Washing machine with drying device
WO1991003591A1 (de) * 1989-08-30 1991-03-21 Albrecht Wulff Trocknungsverfahren und wäschetrockner zur durchführung des verfahrens
EP0424781A2 (de) * 1989-10-24 1991-05-02 Bosch-Siemens HausgerÀ¤te GmbH Haushalt-Wäschetrockner
EP0424781A3 (en) * 1989-10-24 1991-08-21 Bosch-Siemens Hausgeraete Gmbh Household laundry drier
WO2000047810A1 (de) * 1999-02-08 2000-08-17 Miele & Cie. Gmbh & Co. Kondensationswäschetrockner
DE19904993C2 (de) * 1999-02-08 2003-04-17 Miele & Cie Kondensationswäschetrockner
EP1108812A1 (de) * 1999-12-13 2001-06-20 BSH Bosch und Siemens Hausgeräte GmbH Haushalt-Kondensations-Wäschetrockner und Verfahren zu seinem Betrieb
BE1015494A3 (fr) * 2001-12-07 2005-05-03 Hanning Elektro Werke Seche-linge.
EP1541744A1 (de) * 2003-12-11 2005-06-15 Electrolux Home Products Corporation N.V. Haushalt-Wäschetrockner mit verbessertem Kondensator
WO2006114802A1 (en) * 2005-04-27 2006-11-02 Ln2 S.R.L. A forced air circulation system for drying machines and washing/drying machines, particularly for domestic use.
WO2006122838A1 (de) * 2005-05-20 2006-11-23 BSH Bosch und Siemens Hausgeräte GmbH Haushaltgerät zur pflege von wäschestücken insbesondere wäschetrockner
EA012099B1 (ru) * 2005-05-20 2009-08-28 Бсх Бош Унд Сименс Хаусгерете Гмбх Бытовой прибор для ухода за бельём, в особенности машина для сушки белья
WO2008052906A2 (de) * 2006-10-31 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum betreiben eines hausgeräts zur pflege von wäschestücken
WO2008052906A3 (de) * 2006-10-31 2008-06-19 Bsh Bosch Siemens Hausgeraete Verfahren zum betreiben eines hausgeräts zur pflege von wäschestücken
EP2366827A1 (de) * 2010-03-18 2011-09-21 Askoll Holding S.r.l. Gebläse- und Antriebseinheit für einen Kondensations-Wäschetrockner und Kondensations-Wäschetrockner mit einer solchen Einheit
US9683324B2 (en) 2010-03-18 2017-06-20 Askoll Holding S.R.L. Fans-motor assembly for condenser laundry dryer machine and condenser laundry dryer machine comprising said assembly
EP2392725A3 (de) * 2011-09-12 2012-04-25 V-Zug AG Wäschetrockner mit Reversierbetrieb
DE102013108061A1 (de) 2013-07-29 2015-01-29 Miele & Cie. Kg Wäschetrockner mit einem Einmotorenantrieb für die Wäschetrommel und das Prozessluftgebläse
EP2832921A1 (de) 2013-07-29 2015-02-04 Miele & Cie. KG Wäschetrockner mit einem Einmotorenantrieb für die Wäschetrommel und das Prozessluftgebläse

Also Published As

Publication number Publication date
GB2214623B (en) 1991-09-11
GB8800727D0 (en) 1988-02-10
GB2214623A (en) 1989-09-06

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