EP0344549A1 - Heizvorrichtung für eine zum Waschen und Trocknen eingerichtete Wäschebehandlungsmaschine - Google Patents

Heizvorrichtung für eine zum Waschen und Trocknen eingerichtete Wäschebehandlungsmaschine Download PDF

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Publication number
EP0344549A1
EP0344549A1 EP89109099A EP89109099A EP0344549A1 EP 0344549 A1 EP0344549 A1 EP 0344549A1 EP 89109099 A EP89109099 A EP 89109099A EP 89109099 A EP89109099 A EP 89109099A EP 0344549 A1 EP0344549 A1 EP 0344549A1
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EP
European Patent Office
Prior art keywords
tub
clothes
drying
wash
heating apparatus
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
EP89109099A
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English (en)
French (fr)
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EP0344549B1 (de
Inventor
Arturo Cinello
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
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Industrie Zanussi SpA
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Filing date
Publication date
Application filed by Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Publication of EP0344549A1 publication Critical patent/EP0344549A1/de
Application granted granted Critical
Publication of EP0344549B1 publication Critical patent/EP0344549B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating 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 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment

Definitions

  • the present invention relates to a heating apparatus for a combined laundering machine for washing and drying clothes, which is apt to both improve the efficiency of the machine during the clothes drying process and enhance the construction and the assemblability of the machine itself.
  • the present invention relates to a front-loading domestic washing machine, which is equipped with a wash tub within which a clothes drum is able to rotate about a horizontal axis and to accomodate the washload during both the washing and the drying process.
  • Combined washing and drying machines which wash the clothes either by soaking them into the wash liquor or by spraying them with a reduced amount of wash liquor being properly cir­culated in the wash tub, and them dry the washload by a hot-air process.
  • Said drying process can be implemented either by means of a closed-loop air circulation system, where the air is forced to successively flow through a heating apparatus, the drum containing the clothes, a dehumidifying apparatus, and is finally returned to the circuit where the cycle starts again, or by means of an open-loop system which ta­kes in the air from the room, heats it up, sends it through the clothes and finally blows it outside the machine under moist and hot conditions.
  • the heating elements provided to heat up the drying air are preferably placed into a box-like housing which is fixed by welding in the area where the air intake opening lies in the upper part of the wash tub.
  • a further disadvantage lies in the corrosion initiation effects induced by the welding operation performed to attach the heating-element housing onto the wash tub.
  • heating elements are usually employed in this type of machines to heat up the drying air, which are designed to operate at as high temperatures as 600°C in order to ensure a favourable heat-exchange interaction with the drying air and, as such, shall necessarily be sheathed with special-alloy materials having high nickel-chromium contents for increased corrosion strength.
  • Such heating elements require manufac­turing processes which are quite complex and imply high defect rates.
  • a metal screen is furthermore arranged above the body of said heating elements in view of both increasing the heat-exchange surface area and minimizing heat radiation losses towards the outside of the appliance, while at the same time reducing the temperature values which the electrical and other functional parts housed in the upper part of the machine may become exposed to.
  • heating elements of this type are both intensively power-consuming and expensive, and they also require the use of thermal screening arrangements which not only contribute to the construction complexity of the machine, but can also give rise to disturbing noise and vibration problems during certain operation cycles (eg., spin extraction) of the machine.
  • a heating apparatus for a combined clothes washing and drying machine particularly a front-loading washer-dryer machine for home use
  • a heating apparatus for a combined clothes washing and drying machine comprising a wash tub within which a drum is rotatable about a horizontal axis and is capable of accomodating the clothes to be both washed and dried, a drying pneumatic circuit equipped with a blower forcing the drying air to successively flow through a housing containing heat­ing elements and communicating with an opening in the upper part of the wash tub, and the drum con­taining the clothes, to finally expel it out of the tub of the machine
  • the hous­ing of the heating apparatus is joined in a remo­vable way with the opening in the upper part of the wash tub and forms a part of the wall of said wash tub
  • said heating apparatus being formed by one or more electrical resistance heating elements embedded in a mass of heat-radiating material and being further provided with means capable of conveying the drying air toward the drum containing the clothes.
  • the clothes washing and drying machine 4 shown in Fig. 1 is essentially formed by a wash tub 5 in which a drum 6 is mounted in such a way as to be capable of rotating about a horizontal axis and accomodating the clothes to be washed and dried.
  • the drum 6 is driven rotationally by an electric motor and belt-type driving means in a per se known, not shown way, and it features a front loading opening 7 which is in a line with both the front opening 8 in the wash tub and the front open­ing in the outer cabinet (not shown) of the washing and drying machine.
  • the wash tub 5 has a lower opening 9 connected via a conduit 10 with a filtering device, a pump and a drain conduit (not shown) which are provided to duly discharge the wash liquor or the water from the machine at the end of the various washing and rinsing cycles.
  • the machine 4 can in a per se know way perform also the drying of the washed clothes by means of a heated-up air flow which is circulated through the drum 6 containing the wet drying load, and which is then expelled from the tub 5, dehumidified, heated up and blown again into the tub 5.
  • a blower 11 is pro­vided, the suction side of which is connected with the drain conduit 10 of the wash tub 5 through a water-cooled condensing device 12, while the deli­very side of said blower 11 is connected with an opening 13 in the upper part of the wash tub 5 through a housing 14 containing a heating apparatus 15 formed by electrical resistance heating elements.
  • the condensing device 12 is connected to the water mains through a conduit 16 and a water inlet solenoid value (not shown) which deliver to a spray nozzle 17 the water needed to form the cooling curtain for condensing the moisture out of the air expelled from the tub 5.
  • the machine equipped with the heating apparatus according to the invention is capable, in a per se known way, of either traditionally washing the clothes by soaking them in the wash liquor or washing the clothes by spraying a reduced quantity of continuously circulated wash liquor on them.
  • the filtering appa­ratus (not shown) of the machine is connected, via a collecting manifold and a circulation pump (not shown), with a conduit 18 which penetrates into the top part of the tub 5, just above the heating appa­ratus 15, so that it can spray heated-up wash liquor onto the clothes contained in the drum 6.
  • the housing 14 of the heating apparatus 15 is in a preferred way made of stainless steel and is attached in a removable way to the opening 13 in the upper part of the wash tub 5 with the interpo­sition of suitable sealing means 19 (eg., rubber sealing gaskets) therebetween.
  • suitable sealing means 19 eg., rubber sealing gaskets
  • connection of the housing 14 of the heating apparatus 15 with the wash tub 5 is made through the use of tie-rods 20 connected to the ends of a circular strap (not shown) which is capable of being applied in a removable way against the circum­ference of the wash tub 5 as described in European Patent Application No. 0 214 510.
  • the heating apparatus 15 (Fig. 2) is fixed in a removable way to the housing 14, eg. by screw-and-nut or similar fastening means 21, and includes one or more electrical resistance heating elements 22 made of conventional stainless steel material and embedded in a plate 23 of heat-radiat­ing material.
  • Said heat-radiating plate 23 has a rectangular shape extending transversally so as to cover almost the whole surface of the opening 13 in the wash tub 5, except for a narrow passage gap 24 all along the perimeter (Fig. 1).
  • the plate 23 is further provided with a number of through holes 25 (Fig. 3) which are so designed as to enable both the drying air and the wash liquor issuing from the circulation conduit 18 during spray washing of the clothes to freely flow through them.
  • the upper surface of the plate 23 is provided with fins 26 (Fig. 3) which feature a diverging pattern along the direction in which the drying air flows into the tub 5, in view of enabling the drying air to be distributed over the largest possible surface area of the plate 23.
  • the plate 23 may for example be formed by a cast slab of aluminium in all those cases in which the heating elements 22 are required to ope­rate at medium-to-low temperature values which would therefore exclude the occurrence of problems arising from the difference in the thermal expansion coeffi­cients of the stainless steel, of which the heating elements 22 are made, and the aliminium forming the plate 23.
  • the plate 23 may advantageously be made of a ceramic material enabling also normal heating elements, ie. not specially sheathed, to be embedded therein.
  • the heating apparatus as described herein is connected in a removable way with the wash tub 5, thereby elimi­nating all disadvantages deriving from a welded attachment and simplifying maintenance of the housing 14 as well as the possible replacement of the heating apparatus 15.
  • the heating apparatus 15 is such as to make it unnecessary to use expensive heating elements sheathed with high-grade steel claddings, since the heat-radiating plate 23 enables the actually available heat-exchange surface, and as a consequence the efficiency of normal heating elements, to be increased and, at the same time, the heating elements themselves to be effectively protected against corrosion.
  • the heating apparatus 15 may be made to operate at lower temperatures and makes it unnecessary to provide for the arrangement of such heat shielding means as usually required by traditional solutions.
  • the heating apparatus is used in a closed-loop condens­ing-type combined clothes washing and drying ma­chine.
  • the same advantages would also derive from its use in washing and drying machines provided with an open-loop drying circuit.
  • the heating apparatus according to the present invention can of course be further modified or differently made as compared to the described embodiment without departing from the scope of the invention.
  • the heating plate 23 could also be given different shapes (eg. oval or arched) or be made of materials other than those previously mentioned (eg., special ceramics).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP89109099A 1988-05-30 1989-05-19 Heizvorrichtung für eine zum Waschen und Trocknen eingerichtete Wäschebehandlungsmaschine Expired - Lifetime EP0344549B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8834024U IT218167Z2 (it) 1988-05-30 1988-05-30 Dispositivo di riscaldamento per macchina combinata per il lavaggio e l'asciugatura della biancheria.
IT3402488 1988-05-30

Publications (2)

Publication Number Publication Date
EP0344549A1 true EP0344549A1 (de) 1989-12-06
EP0344549B1 EP0344549B1 (de) 1993-03-03

Family

ID=11238767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109099A Expired - Lifetime EP0344549B1 (de) 1988-05-30 1989-05-19 Heizvorrichtung für eine zum Waschen und Trocknen eingerichtete Wäschebehandlungsmaschine

Country Status (5)

Country Link
EP (1) EP0344549B1 (de)
JP (1) JPH0223993A (de)
DE (1) DE68905079T2 (de)
ES (1) ES2038369T3 (de)
IT (1) IT218167Z2 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816550A1 (de) * 1996-07-05 1998-01-07 Esswein S.A. Heizverfahren und -vorrichtung für Waschtrockner
EP0890669A2 (de) * 1997-07-11 1999-01-13 BSH Bosch und Siemens Hausgeräte GmbH Elektriches Wasch- und/oder Trockengerät mit elektrischem Heizelement
EP1538255A1 (de) * 2003-12-02 2005-06-08 DBK David + Baader GmbH Abdeckung für einen Wäschetrockner und Verfahren zu dessen Zusammenbau
WO2006095935A2 (en) * 2005-03-09 2006-09-14 Lg Electronics Inc. Apparatus for supplying hot air in drum type washer with dry function
US7204040B2 (en) 2004-02-27 2007-04-17 Lg Electronics Inc. Apparatus for supplying hot air in drum type washer with dry function
EP1967634A2 (de) * 2007-03-05 2008-09-10 Samsung Electronics Co., Ltd. Waschmaschine und Verfahren zu ihrer Steuerung
EP2019163A1 (de) * 2007-07-26 2009-01-28 CANDY S.p.A. Wasch- und Trocknungsmaschine
EP2085507A1 (de) 2008-01-31 2009-08-05 BSH Bosch und Siemens Hausgeräte GmbH Wäschebehandlungsverfahren und elektrisches Haushaltsgerät dafür
EP1857584A3 (de) * 2006-05-17 2009-10-14 Herbert Kannegiesser GmbH Verfahren und Vorrichtung zum Behandeln, vorzugsweise Waschen, Schleudern und/oder Trocknen, von Wäsche
CN103911824A (zh) * 2013-01-06 2014-07-09 苏州三星电子有限公司 一种洗衣干衣机
CN109423803A (zh) * 2017-09-01 2019-03-05 青岛海尔滚筒洗衣机有限公司 洗衣机
CN109423802A (zh) * 2017-09-01 2019-03-05 青岛海尔滚筒洗衣机有限公司 洗衣机
CN109423805A (zh) * 2017-09-01 2019-03-05 青岛海尔滚筒洗衣机有限公司 洗衣机
CN110499609A (zh) * 2018-05-16 2019-11-26 青岛海尔洗衣机有限公司 便携式衣物处理设备

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002336590A (ja) * 2001-05-16 2002-11-26 Tokyo Gas Co Ltd 全自動洗濯乾燥機
US7421865B2 (en) * 2003-12-18 2008-09-09 Lg Electronics Inc. Washing machine with drying function and method of controlling the same
JP2007044286A (ja) * 2005-08-10 2007-02-22 Sharp Corp 乾燥洗濯機
KR101387497B1 (ko) * 2007-08-03 2014-04-21 엘지전자 주식회사 의류처리장치
CN110541273B (zh) * 2018-05-28 2022-05-17 博西华电器（江苏）有限公司 衣物护理机及其控制方法
DE102020103787A1 (de) 2020-02-13 2021-08-19 Miele & Cie. Kg Trockner
DE102020103796A1 (de) 2020-02-13 2021-08-19 Miele & Cie. Kg Trockner

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607209A (en) * 1948-06-09 1952-08-19 Bendix Home Appliances Inc Combination washer and drier
US2682599A (en) * 1953-02-05 1954-06-29 Maytag Co Heating assembly for clothes driers or the like
FR1160079A (fr) * 1955-10-26 1958-07-07 Thomson Houston Comp Francaise Radiateur électrique perfectionné pour machines à laver et à sécher le linge
US2867430A (en) * 1952-12-31 1959-01-06 Murray Corp Laundry dryers
GB2044297A (en) * 1979-03-16 1980-10-15 Domar Sa Clothes Washing Machine Incorporating a Drying Device
DE3340313A1 (de) * 1983-11-08 1985-05-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Haushalt-waeschetrockner
EP0214510A2 (de) * 1985-09-05 1987-03-18 INDUSTRIE ZANUSSI S.p.A. Waschmaschine
EP0240910A2 (de) * 1986-04-09 1987-10-14 INDUSTRIE ZANUSSI S.p.A. Wasch- und Trockenmaschine
EP0252323A2 (de) * 1986-07-11 1988-01-13 INDUSTRIE ZANUSSI S.p.A. Kombinierte Waschmaschine und Trockner

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607209A (en) * 1948-06-09 1952-08-19 Bendix Home Appliances Inc Combination washer and drier
US2867430A (en) * 1952-12-31 1959-01-06 Murray Corp Laundry dryers
US2682599A (en) * 1953-02-05 1954-06-29 Maytag Co Heating assembly for clothes driers or the like
FR1160079A (fr) * 1955-10-26 1958-07-07 Thomson Houston Comp Francaise Radiateur électrique perfectionné pour machines à laver et à sécher le linge
GB2044297A (en) * 1979-03-16 1980-10-15 Domar Sa Clothes Washing Machine Incorporating a Drying Device
DE3340313A1 (de) * 1983-11-08 1985-05-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Haushalt-waeschetrockner
EP0214510A2 (de) * 1985-09-05 1987-03-18 INDUSTRIE ZANUSSI S.p.A. Waschmaschine
EP0240910A2 (de) * 1986-04-09 1987-10-14 INDUSTRIE ZANUSSI S.p.A. Wasch- und Trockenmaschine
EP0252323A2 (de) * 1986-07-11 1988-01-13 INDUSTRIE ZANUSSI S.p.A. Kombinierte Waschmaschine und Trockner

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816550A1 (de) * 1996-07-05 1998-01-07 Esswein S.A. Heizverfahren und -vorrichtung für Waschtrockner
FR2750709A1 (fr) * 1996-07-05 1998-01-09 Esswein Sa Procede et dispositif de chauffage pour machine a laver sechante
EP0890669A2 (de) * 1997-07-11 1999-01-13 BSH Bosch und Siemens Hausgeräte GmbH Elektriches Wasch- und/oder Trockengerät mit elektrischem Heizelement
EP0890669A3 (de) * 1997-07-11 1999-06-02 BSH Bosch und Siemens Hausgeräte GmbH Elektriches Wasch- und/oder Trockengerät mit elektrischem Heizelement
US8371040B2 (en) 2003-12-02 2013-02-12 Dbk David + Baader Gmbh Cover for a clothes dryer and assembling method thereof
EP1538255A1 (de) * 2003-12-02 2005-06-08 DBK David + Baader GmbH Abdeckung für einen Wäschetrockner und Verfahren zu dessen Zusammenbau
US7204040B2 (en) 2004-02-27 2007-04-17 Lg Electronics Inc. Apparatus for supplying hot air in drum type washer with dry function
WO2006095935A3 (en) * 2005-03-09 2007-03-08 Lg Electronics Inc Apparatus for supplying hot air in drum type washer with dry function
WO2006095935A2 (en) * 2005-03-09 2006-09-14 Lg Electronics Inc. Apparatus for supplying hot air in drum type washer with dry function
EP1857584A3 (de) * 2006-05-17 2009-10-14 Herbert Kannegiesser GmbH Verfahren und Vorrichtung zum Behandeln, vorzugsweise Waschen, Schleudern und/oder Trocknen, von Wäsche
EP1967634A2 (de) * 2007-03-05 2008-09-10 Samsung Electronics Co., Ltd. Waschmaschine und Verfahren zu ihrer Steuerung
EP2019163A1 (de) * 2007-07-26 2009-01-28 CANDY S.p.A. Wasch- und Trocknungsmaschine
EP2085507A1 (de) 2008-01-31 2009-08-05 BSH Bosch und Siemens Hausgeräte GmbH Wäschebehandlungsverfahren und elektrisches Haushaltsgerät dafür
CN103911824A (zh) * 2013-01-06 2014-07-09 苏州三星电子有限公司 一种洗衣干衣机
CN109423803A (zh) * 2017-09-01 2019-03-05 青岛海尔滚筒洗衣机有限公司 洗衣机
CN109423802A (zh) * 2017-09-01 2019-03-05 青岛海尔滚筒洗衣机有限公司 洗衣机
CN109423805A (zh) * 2017-09-01 2019-03-05 青岛海尔滚筒洗衣机有限公司 洗衣机
CN109423805B (zh) * 2017-09-01 2022-05-27 青岛海尔滚筒洗衣机有限公司 洗衣机
CN110499609A (zh) * 2018-05-16 2019-11-26 青岛海尔洗衣机有限公司 便携式衣物处理设备

Also Published As

Publication number Publication date
DE68905079T2 (de) 1993-06-17
IT218167Z2 (it) 1992-04-08
ES2038369T3 (es) 1993-07-16
DE68905079D1 (de) 1993-04-08
JPH0223993A (ja) 1990-01-26
IT8834024V0 (it) 1988-05-30
EP0344549B1 (de) 1993-03-03

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