EP0344549B1 - Heating apparatus for combined clothes washing and drying machine - Google Patents

Heating apparatus for combined clothes washing and drying machine Download PDF

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Publication number
EP0344549B1
EP0344549B1 EP89109099A EP89109099A EP0344549B1 EP 0344549 B1 EP0344549 B1 EP 0344549B1 EP 89109099 A EP89109099 A EP 89109099A EP 89109099 A EP89109099 A EP 89109099A EP 0344549 B1 EP0344549 B1 EP 0344549B1
Authority
EP
European Patent Office
Prior art keywords
tub
heating apparatus
drying
wash
opening
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.)
Expired - Lifetime
Application number
EP89109099A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0344549A1 (en
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
Original Assignee
Industrie Zanussi SpA
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 Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Publication of EP0344549A1 publication Critical patent/EP0344549A1/en
Application granted granted Critical
Publication of EP0344549B1 publication Critical patent/EP0344549B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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, in particular 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.
  • a combined washing and drying machine is known with heating elements for both water and air heating.
  • the heating elements are arranged in a container welded on the upper portion of the laundering tub. During the washing phase the washing liquid is pumped into the container and returns to the tub by overflowing one side-wall of the container, i.e. the heating elements are fully immersed during water heating.
  • 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 (e.g., spin extraction) of the machine.
  • 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.
  • US-Patent 2867430 discloses a heating apparatus for a front-loading dryer machine for domestic use. Because of the great constructive and functional differences between special dryers and combined washing-drying-machines, e.g. the absence of a tub in the special dryer, the solutions shown in this document are not applicable to the problems of the combined washing-drying-machines.
  • 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, with a system for circulating the wash liquor 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, characterized in that the housing of the heating apparatus is joined in a removable way with the opening in the upper part of the wash tub that the heating apparatus is formed by one or more electrical resistance heating elements embedded in a mass of heat-radiating material which is shaped as a rectangular plate extending transversally so as to cover almost the whole surface of the opening through which the drying air flows into the tub, and that drying air conveying means are
  • 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 valve (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 EP-A-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 aluminium 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 Heating apparatus for combined clothes washing and drying machine Expired - Lifetime EP0344549B1 (en)

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 EP0344549A1 (en) 1989-12-06
EP0344549B1 true EP0344549B1 (en) 1993-03-03

Family

ID=11238767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109099A Expired - Lifetime EP0344549B1 (en) 1988-05-30 1989-05-19 Heating apparatus for combined clothes washing and drying machine

Country Status (5)

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

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750709B1 (fr) * 1996-07-05 1998-10-30 Esswein Sa Procede et dispositif de chauffage pour machine a laver sechante
DE19729848A1 (de) * 1997-07-11 1999-01-14 Bosch Siemens Hausgeraete Elektrisches Wasch- und/oder Trockengerät mit elektrischem Heizelement
JP2002336590A (ja) * 2001-05-16 2002-11-26 Tokyo Gas Co Ltd 全自動洗濯乾燥機
DE50302587D1 (de) * 2003-12-02 2006-05-04 Dbk David & Baader Gmbh Abdeckung für einen Wäschetrockner und Verfahren zu dessen Zusammenbau
US7421865B2 (en) * 2003-12-18 2008-09-09 Lg Electronics Inc. Washing machine with drying function and method of controlling the same
US7204040B2 (en) 2004-02-27 2007-04-17 Lg Electronics Inc. Apparatus for supplying hot air in drum type washer with dry function
CN100590250C (zh) * 2005-03-09 2010-02-17 Lg电子株式会社 将热空气供应到具有干燥功能的滚筒式洗衣机中的装置
JP2007044286A (ja) * 2005-08-10 2007-02-22 Sharp Corp 乾燥洗濯機
DE102006023389A1 (de) * 2006-05-17 2007-11-22 Herbert Kannegiesser Gmbh Verfahren und Vorrichtung zum Behandeln, vorzugsweise Waschen, Schleudern und/oder Trocknen, von Wäsche
KR101407958B1 (ko) * 2007-03-05 2014-06-19 삼성전자 주식회사 세탁기 및 그 제어방법
EP2019163B1 (en) * 2007-07-26 2018-02-28 Candy S.p.A. Washer dryer machine
KR101387497B1 (ko) * 2007-08-03 2014-04-21 엘지전자 주식회사 의류처리장치
CN101498089B (zh) 2008-01-31 2010-12-01 博西华电器（江苏）有限公司 处理衣物的方法及处理衣物所用的电器设备
CN103911824B (zh) * 2013-01-06 2017-02-08 苏州三星电子有限公司 一种洗衣干衣机
CN109423802B (zh) * 2017-09-01 2022-04-22 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
CN109423803B (zh) * 2017-09-01 2022-04-19 青岛海尔滚筒洗衣机有限公司 洗衣机
CN110499609B (zh) * 2018-05-16 2023-06-16 青岛海尔洗衣机有限公司 便携式衣物处理设备
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

Family Cites Families (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
GB845279A (en) * 1955-10-26 1960-08-17 Gen Electric Heating arrangement for combined clothes washing and drying machines
ES242354Y (es) * 1979-03-16 1979-11-16 Dispositivo de secado para maquinas lavadoras de ropa.
DE3340313A1 (de) * 1983-11-08 1985-05-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Haushalt-waeschetrockner
IT1187290B (it) * 1985-09-05 1987-12-23 Zanussi Elettrodomestici Macchina lavabiancheria
IT1192075B (it) * 1986-04-09 1988-03-31 Zanussi Elettrodomestici Macchina elettrodomestica per il lavaggio e l'asciagatura della biancheria
IT1201780B (it) * 1986-07-11 1989-02-02 Zanussi Elettrodomestici Macchina combinata per il lavaggio e l'asciugatura della biancheria

Also Published As

Publication number Publication date
DE68905079T2 (de) 1993-06-17
IT218167Z2 (it) 1992-04-08
DE68905079D1 (de) 1993-04-08
ES2038369T3 (es) 1993-07-16
JPH0223993A (ja) 1990-01-26
IT8834024V0 (it) 1988-05-30
EP0344549A1 (en) 1989-12-06

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