EP0743389A1 - Wäschetrockner mit einem Kondensator mit einer Sicherheitsvorrichtung gegen Wassermangel - Google Patents

Wäschetrockner mit einem Kondensator mit einer Sicherheitsvorrichtung gegen Wassermangel Download PDF

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Publication number
EP0743389A1
EP0743389A1 EP96106698A EP96106698A EP0743389A1 EP 0743389 A1 EP0743389 A1 EP 0743389A1 EP 96106698 A EP96106698 A EP 96106698A EP 96106698 A EP96106698 A EP 96106698A EP 0743389 A1 EP0743389 A1 EP 0743389A1
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EP
European Patent Office
Prior art keywords
pressure
machine
water
clothes
drying
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.)
Granted
Application number
EP96106698A
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English (en)
French (fr)
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EP0743389B1 (de
Inventor
Silvano Cimetta
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 Zanussi SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
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Publication date
Application filed by Electrolux Zanussi Elettrodomestici SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0743389A1 publication Critical patent/EP0743389A1/de
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Publication of EP0743389B1 publication Critical patent/EP0743389B1/de
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    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level

Definitions

  • the present invention refers to an improved type of clothes drying machine, or combined clothes washing and drying machine, wherein the clothes drying process is performed by condensing the moisture contained in the hot air being forced through the clothes by ventilation, said machine comprising an arrangement that makes the operation thereof particularly safe and reliable.
  • Clothes drying machines are known in the art which operate by the condensation of a flow of hot air which is blown through the drum of the machine, thereby removing the moisture contained in the clothes.
  • Such machines are generally known to be made by installing a ventilation system, generally a blower consisting of a fan and associated electric driving motor, which causes the air to circulate in a closed-loop through a conduit, heats it up and blows it into the drum containing the clothes to be dried.
  • a heating element is installed inside said conduit which, when appropriately energized, heats up the air forced by said blower to flow through said conduit past said heating element, so that air is let into the drum which is sufficiently hot to cause the moisture contained in the clothes to evaporate.
  • the moisture-laden hot air is then caused by suction to leave the drum and to flow through a condensation arrangement which is generally formed by a sprinkle of cold water taken in from the water supply mains to create a cold barrier against which said moisture-laden hot air is blown.
  • the moisture is condensed off the circulated hot air, whereas the condensate is conveyed on to the bottom of the tub, from where it is then easily exhausted.
  • the machine is a clothes drying machine, or a combined clothes washing and drying machine being used to only perform a drying cycle
  • a closed condition of the water shut-off valve governing the water inlet from the mains into the machine would not prevent the machine from operating, albeit under totally irregular conditions that become apparent mostly in the form of a practical absence of any drying effect and a progressively rising temperature of the circulated air up to values that may jeopardize the integrity of both the clothes and the machine.
  • the course of the temperature during the initial phase of the process may be used to anticipate the actual course of the whole drying process so as to therefore cause the cycle to be automatically stopped when such a process is estimated to have completed its drying task, it will be readily appreciated that an irregular course of the temperature of the drying air would completely distort the procedure for automatically calculating the duration of the drying cycle.
  • water will be used to indistinctly mean both the cooling liquor and the liquor generated by the condensation of the moisture from the clothes. This simplification will not, however, affect to any extent the full understandability of the description, owing to the context in which this term is each time used, as this will readily be appreciated by anyone skilled in the art.
  • the combined clothes washing and drying machine according to the present invention is provided with a vessel 1, possibly a rotating drum 1A holding the drying load if the machine doubles also as a washing machine, an air circulation, condensation and heating-up conduit 2, said air being taken in from the vessel at a suction zone 3 and, after having been dehumidified, being returned into the vessel through a return zone 4.
  • Said conduit comprises a motor-driven blowing fan 5, a resistance-type electric heating element 6 for heating up the circulating air, and a condensation arrangement for condensing the moisture off the air, said arrangement comprising at least a nozzle 7 from which a sprinkle of atomized or similarly sprayed water is issued to create a cold barrier through which the moisture-laden hot air is caused to pass by a suction effect. Due to the effect of such a cold barrier, the moisture contained in the hot air is condensed and its liquid fraction is conveyed by gravity into an appropriate chamber provided in the lower portion of said condensation arrangement, from which it is then exhausted with traditional means.
  • the invention lies in measuring the amount of water possibly issued by the sprinkle during a pre-determined period of time, as well as comparing the measured value with a previously determined and appropriately established reference value. Should such a measured amount of water turn out to be smaller than the predetermined reference value, this means that the nozzle is either failing to issue a water sprinkle at all or issuing water to an insufficient extent, so that either automatic or manual means will be activated to cause the drying cycle to stop and the irregular condition to be appropriately indicated.
  • An appropriate pressure switch 8 is provided to such a purpose, which is adapted to measure the pressure at a point 9 in the sump in which said condensation water collects.
  • a sump is shown to be the chamber of the drain pump of the machine. In any case, it shall of course be situated below the arrangement holding the condenser, so that the outflowing water is able to collect therein by gravity.
  • the machine is arranged so as to be capable of performing a cycle aimed at verifying the presence of water sprinkling from said nozzle, said cycle consisting at the beginning of a pre-determined period of time in the measurement of the pressure existing at said point 9, in setting the conditions for activating the outlet of the water, if any, collecting on the bottom of said sump, and, at the end of said pre-determined period of time, in shutting off the inlet of water and measuring the pressure at the same point 9. It will clearly be appreciated that, if there has been no water inlet or such an inlet has been insufficient, the irregular condition can be measured and detected on the basis of the difference between the initial pressure and the final pressure measured at said point 9.
  • Such a pressure difference can be recorded and compared with an approrpiate pre-set value, as this can on the other hand be done using means and methods commonly known in the art, wherein the more or less effective operation of the nozzle 7, ie. the greater or smaller effectiveness of the water sprinkle generated by it, can be readily inferred from the result of such a comparison.
  • Figure 3 illustrates a block diagram indicating the logical sequence of the phases included in said cycle performed to verify the presence of the water sprinkle issuing from the nozzle, in which the sump is preliminarily emptied and the difference between the lower level A and the higher level B reached by the water is finally calculated by measuring the respective pressure values.
EP96106698A 1995-05-18 1996-04-27 Wäschetrockner mit einem Kondensator mit einer Sicherheitsvorrichtung gegen Wassermangel Expired - Lifetime EP0743389B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95PN000026A IT1282926B1 (it) 1995-05-18 1995-05-18 Macchina asciugabiancheria a condensazione dotata di un dispositivo di sicurezza-acqua
ITPN950026 1995-05-18

Publications (2)

Publication Number Publication Date
EP0743389A1 true EP0743389A1 (de) 1996-11-20
EP0743389B1 EP0743389B1 (de) 1999-07-14

Family

ID=11395022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106698A Expired - Lifetime EP0743389B1 (de) 1995-05-18 1996-04-27 Wäschetrockner mit einem Kondensator mit einer Sicherheitsvorrichtung gegen Wassermangel

Country Status (4)

Country Link
EP (1) EP0743389B1 (de)
DE (1) DE69603225T2 (de)
ES (1) ES2138262T3 (de)
IT (1) IT1282926B1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030061188A (ko) * 2002-01-11 2003-07-18 엘지전자 주식회사 건조겸용 드럼세탁기의 응축장치
KR100595188B1 (ko) 2003-09-24 2006-07-03 엘지전자 주식회사 응축식 의류건조기의 응축기
CN101560724B (zh) * 2008-04-17 2011-01-12 Bsh博世和西门子家用器具有限公司 具有通风的滚筒的洗涤-烘干机
EP2278061A1 (de) * 2009-07-23 2011-01-26 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Ansteuerung einer Wäschetrocknervorrichtung
US7921578B2 (en) 2005-12-30 2011-04-12 Whirlpool Corporation Nebulizer system for a fabric treatment appliance
US8132339B2 (en) * 2007-08-03 2012-03-13 Lg Electronics Inc. Cloth treating apparatus
US8844160B2 (en) 1997-04-29 2014-09-30 Whirlpool Corporation Modular fabric revitalizing system
EP3081688A3 (de) * 2010-12-22 2016-11-02 Indesit Company S.p.A. Elektrohaushaltsgerät
EP3181751A1 (de) * 2015-12-18 2017-06-21 Whirlpool Corporation Wäschebehandlungsgerät und verfahren zum betrieb

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665227B2 (en) 2005-12-30 2010-02-23 Whirlpool Corporation Fabric revitalizing method using low absorbency pads
US7735345B2 (en) 2005-12-30 2010-06-15 Whirlpool Corporation Automatic fabric treatment appliance with a manual fabric treatment station
CN101029443B (zh) * 2006-02-28 2010-05-26 海尔集团公司 设置有二次雾化装置的滚筒式洗衣机
DE102007061523A1 (de) * 2007-12-20 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrocknungsgerät und Verfahren zum Betreiben desselben
CN107604617B (zh) * 2017-11-02 2020-05-05 南京创维家用电器有限公司 一种洗烘一体机的冷凝系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695460A (en) * 1952-09-18 1954-11-30 Gen Electric Clothes drying machine
DE1242303B (de) * 1963-02-12 1967-06-15 Siemens Elektrogeraete Gmbh Nach dem Trommelprinzip arbeitender Waeschetrockner
DE2429078A1 (de) * 1974-03-20 1976-01-08 Hugo Werner Geschka Automatischer waeschetrockner
FR2332360A1 (fr) * 1975-11-21 1977-06-17 Esswein Sa Machine a laver et secher le linge
EP0552842A1 (de) * 1992-01-24 1993-07-28 CANDY S.p.A. Sicherheitsvorrichtung gegen Wasserverschmutzung für den Trocknungskreislauf eines Waschtrockners

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695460A (en) * 1952-09-18 1954-11-30 Gen Electric Clothes drying machine
DE1242303B (de) * 1963-02-12 1967-06-15 Siemens Elektrogeraete Gmbh Nach dem Trommelprinzip arbeitender Waeschetrockner
DE2429078A1 (de) * 1974-03-20 1976-01-08 Hugo Werner Geschka Automatischer waeschetrockner
FR2332360A1 (fr) * 1975-11-21 1977-06-17 Esswein Sa Machine a laver et secher le linge
EP0552842A1 (de) * 1992-01-24 1993-07-28 CANDY S.p.A. Sicherheitsvorrichtung gegen Wasserverschmutzung für den Trocknungskreislauf eines Waschtrockners

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8844160B2 (en) 1997-04-29 2014-09-30 Whirlpool Corporation Modular fabric revitalizing system
KR20030061188A (ko) * 2002-01-11 2003-07-18 엘지전자 주식회사 건조겸용 드럼세탁기의 응축장치
KR100595188B1 (ko) 2003-09-24 2006-07-03 엘지전자 주식회사 응축식 의류건조기의 응축기
US7921578B2 (en) 2005-12-30 2011-04-12 Whirlpool Corporation Nebulizer system for a fabric treatment appliance
US8132339B2 (en) * 2007-08-03 2012-03-13 Lg Electronics Inc. Cloth treating apparatus
CN101560724B (zh) * 2008-04-17 2011-01-12 Bsh博世和西门子家用器具有限公司 具有通风的滚筒的洗涤-烘干机
EP2278061A1 (de) * 2009-07-23 2011-01-26 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Ansteuerung einer Wäschetrocknervorrichtung
EP3081688A3 (de) * 2010-12-22 2016-11-02 Indesit Company S.p.A. Elektrohaushaltsgerät
EP3181751A1 (de) * 2015-12-18 2017-06-21 Whirlpool Corporation Wäschebehandlungsgerät und verfahren zum betrieb
US10648125B2 (en) 2015-12-18 2020-05-12 Whirlpool Corporation Laundry treating appliance and method of operation
US11585032B2 (en) 2015-12-18 2023-02-21 Whirlpool Corporation Laundry treating appliance and method of operation

Also Published As

Publication number Publication date
ITPN950026A1 (it) 1996-11-18
ITPN950026A0 (it) 1995-05-18
DE69603225T2 (de) 1999-11-11
DE69603225D1 (de) 1999-08-19
ES2138262T3 (es) 2000-01-01
EP0743389B1 (de) 1999-07-14
IT1282926B1 (it) 1998-04-01

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