EP0816548B1 - Zusatzvorrichtung zum Umwandeln des Trocknungskreislaufs einer mit offenem Trocknungskreislauf Haushaltwaschmaschine in einen geschlossenen Kreislauf mit Luftkondensation des Wasserdampfes - Google Patents

Zusatzvorrichtung zum Umwandeln des Trocknungskreislaufs einer mit offenem Trocknungskreislauf Haushaltwaschmaschine in einen geschlossenen Kreislauf mit Luftkondensation des Wasserdampfes Download PDF

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Publication number
EP0816548B1
EP0816548B1 EP97200675A EP97200675A EP0816548B1 EP 0816548 B1 EP0816548 B1 EP 0816548B1 EP 97200675 A EP97200675 A EP 97200675A EP 97200675 A EP97200675 A EP 97200675A EP 0816548 B1 EP0816548 B1 EP 0816548B1
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EP
European Patent Office
Prior art keywords
mouth
washer dryer
air
heat exchanger
accessory equipment
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
EP97200675A
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English (en)
French (fr)
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EP0816548A2 (de
EP0816548A3 (de
Inventor
Silvano Fumagalli
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Candy SpA
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Candy SpA
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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention relates to a accessory equipment for converting the drying circuit of a Washing machine of domestic type with open drying circuit into a closed circuit, with condensation of the water vapour by air.
  • An accessory equipment according to the preamble of claim 1 is disclosed in US4516331.
  • washing machines of domestic type known as washer dryers which not only wash the laundry but also dry it with a flow of heated air drawn in in a closed drying circuit which includes, in order, a washing tub and drum assembly, an air/water heat exchanger, a suction unit, and a heating unit consisting of electrical resistors.
  • the flow of of air produced by the suction unit is heated by the electrical resistors and conveyed into the washing drum, where, as it passes through the wet laundry, evaporates the absorbed water.
  • the moist air is cooled down by a stream of cold water taken from the water main and discharged into the sump. This cooling causes the water vapour to condense and it is then collected in the washing tub and discharged together with the cooling water.
  • the dried air is then drawn in by the suction unit and recycled.
  • dryers having the sole function of drying the laundry, which use the same concept of drying by means of a flow of hot air in a closed cycle: such machine have an air/air heat exchanger which, in order to cool the moist air and condense the water vapour, use air from the environment, which a suction unit circulates through the heat exchanger, in place of mains water.
  • the present invention solves the disadvantages of both categories of washer dryer and dryer mentioned above by providing an accessory equipment for a versatile washer dryer that is economical and simple to manufacture, and equipped in its basic version with only an open-type drying circuit that can be converted, if circumstances so require, to a closed circuit, by using the accessory equipment, the cost of which does not necessarily impact on the basic washer dryer model but only if the accessory equipment is indispensable.
  • the accessory equipment can easily be installed as an option on the basic model, either in the final stage of production as a special version of the product or as an option brought in later by the user.
  • the accessory equipment which is the subject of the present invention, may comprise in its simplest form a filter for trapping fluff and lint and an air/air heat exchanger water vapour condenser.
  • the accessory equipment may also comprise an auxiliary fan unit for drawing a secondary flow of cooling and condensing air through the heat exchanger.
  • a washer dryer comprises a structure 1 of standardized dimensions, for example, width 60 cm, depth 50 cm, height 80 cm, in which is housed, on sprung mountings, a washing tub 2 containing a rotating drum 3, drive members (not shown), a discharge filter/pump /unit 4 whose inlet is connected to the bottom of the tub 2 by a flexible tube 5, while its outlet is connected to a discharge pipe 6.
  • the drum 3 is generally loaded with washing through a front door 7.
  • the structure of the machine includes a fan unit 8 which, unlike ordinary washer dryers, sucks in air from the environment through a suction mouth 9 that opens on the rear wall of the machine and is connected to the fan unit 3 by a flexible hose 10.
  • the fan unit 8 conveys the in-drawn air into a heating chamber 11, in itself conventional, where the in-drawn air is heated by means of electrical resistors 12.
  • the hot air is conveyed through a pipe 13 and the loading mouth of the washing drum 3, into the drum itself.
  • the hot air passes through the washing drum before leaving the washing tub through an outflow mouth 14 connected to the washing tub by a flexible tube 15 and open to the external environment through the rear wall of the machine.
  • the outflow mouth 14 is of course open at a higher level than the maximum level to which the tub 2 can be filled with washing water, this level being indicated by the numeral 16.
  • the delivery pipe 13 and the outflow mouth are conveniently arranged in diametrically opposite positions with respect to the washing tub, for a more efficient sweeping of the washing drum and of the laundry contained inside it and hence for a more efficient drying action.
  • the fan unit 8 and the heating chamber 11 are mounted directly on the tub 2.
  • they can also be attached to any suitable frame integral with the machine structure 1, in which case the flexible hose 10 can be replaced by a rigid pipe.
  • the machine shown in Figs 1 and 2 is advantageously fitted with a pipe 117 for collecting the condensed water: it opens through the rear wall of the machine at a higher level than the maximum filling level and is connected to the discharge filter/pump unit 4.
  • the machine's programme selector is of course also designed to execute a drying cycle in the course of which the drum 3 is rotated at a predetermined speed, and the fan 8 and heating elements 12 are on.
  • the machine is made able to operate also as a dryer.
  • the hot moist air emitted through the mouth 14 disperses freely into the atmosphere.
  • This valve which during washing operations is not subject to any pressure difference, may consist of a butterfly valve whose normal position is closed and which is opened by the pressure difference produced when the fan 8 is turned on.
  • valve may be controlled by a thermomechanical actuator of known type which is often used in this field or by any other functionally equivalent means.
  • a machine of the type described can, either towards the end of the manufacturing process or in the user's home, be fitted with different levels of optional equipment to increase its performance and range of possible uses.
  • FIGS 3 and 4 show, in a partially sectioned rear view and in a front-to-rear transverse section, respectively, a portion of the washer dryer.
  • a housing is formed for a diffusion chamber 19 connected at the bottom to and communicating with the outflow mouth 14 via a tube 20, or alternatively directly.
  • the diffusion chamber 19 is closed at the top by a removable grille 21 that functions as a frame for a gauze filter 22.
  • the grille 21 has relief ribs 23 in the upper plane of the machine to ensure that there are always communication slits between the inside and outside of the chamber, even if objects are placed on the grille which could obstruct the apertures of the grille.
  • the machine can easily be converted into a washer dryer with a closed drying circuit by attaching to the back of the machine an accessory unit comprising a fan, an air/air heat exchanger and a fluff filter.
  • the accessory consists of a flat casing 24 having depth D of the order of 7 - 15 cm, width W approximately equal to the width of the washer dryer (60 cm is a standardized dimension) and extending in height above the maximum level to which the machine can be filled with liquid, up to approximately the top surface of the machine.
  • a cassette filter 26 Removably housed in the casing, which is closed at the top by a removable cover 25, and with suitable internal ribs and membranes to hold them in position, are a cassette filter 26, a heat exchanger 27 and a fan unit 28.
  • the bottom of the casing 24 forms a condensation collecting chamber 29.
  • the wall of the casing 24 placed against the rear wall of the washer dryer 30 includes an aperture 31 connected (by a pipe fitting, elastic flange and the like) to the outflow mouth carrying the hot moist air from the machine.
  • the hot air enters a chamber formed between the filter 26 and the wall of the casing unit placed against the rear wall of the machine, passes through the filter 26 and is conveyed, its path defined by a membrane 32, to the condensation collecting chamber 29.
  • the manifold 33 contains an outflow aperture 34 opposite the suction mouth of the machine's drying circuit.
  • the wall of the casing 24 placed against the rear wall of the machine has of course a corresponding aperture.
  • the broken line with arrows 35 represents the path of the air through the casing, from the inlet mouth 31 to the outlet mouth 34.
  • the hot moist air is cooled down to produce condensation which drips into the collecting chamber 29, from where it is extracted by a discharge mouth 36 connected to the condensation collecting pipe 117 (Fig. 1) of the washer dryer and conveyed into the washing tub (where it can advantageously be kept for a later washing operation, thereby helping to reduce the amount of water consumed for the washing operation and reducing its hardness) or be directly expelled by the action of the discharge pump 4 (Fig. 1).
  • the fan unit 28 has an inlet mouth connected to a suction pipe 37, the top of which is open and communicates with the environment through a grille 38 in the removable cover 25.
  • the solid line with arrows 40 represents the path of the cooling air through the casing 24.
  • the filter 26, having an upper cap 41 with handle 42, can be lifted up out of its housing to allow periodic easy cleaning.
  • heat exchanger 27 integral with the manifold 33 and having a handle 43, can be lifted up out of its housing for periodical inspection and cleaning, if necessary.
  • the casing can easily be fitted securely to the rear wall of the washer dryer as an optional accessory using screws, hanging hooks or equivalent means.
  • the fan unit 28 can be connected up electrically by a plug connector into a power socket on the rear wall of the machine, or even by a terminal board accessible from the back of the machine.
  • the fan 28 can be turned on at the same time as the fan 8.
  • the pump may be used at the end or for short intervals in the course of the drying cycle even if the accessory unit is not present.
  • the fan unit 8 of the washer dryer shown in Figs 1 and 2 in this case preferably mounted on the structure/frame of the machine and not on the washing tub, can be provided with a second rotor having a suction mouth and delivery mouth that open through the rear wall of the machine.
  • the accessory unit formed by the casing 24 shown in Fig. 5 will not require its own fan and can be fitted with a suction pipe (such as 37) which is connected to the suction mouth of the second rotor as well as with a delivery pipe which connects with the delivery mouth of the second rotor to convey the cooling air through the heat exchanger.
  • a suction pipe such as 37
  • the accessory unit comprises only static components (filter and heat exchanger) and does not need to be connected electrically to the washer dryer.
  • a removable cap may be fitted over the suction mouth of the second rotor, or even, conveniently, a connecting tube running between the outlet mouth of the second rotor and the suction mouth of the first rotor so as to use the two rotors in series and thus achieve a higher throughput of air.
  • accessory equipment is preferably installed on the rear wall of the washer dryer (primarily so that it can be slotted into a space in a modular kitchen and so that the top panel of the machine can be used as a work surface), it is also possible to manufacture accessory equipment, for converting the machine drying circuit from open to closed, that fits over the top of the volume of the machine and is firmly attached to the top panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (15)

  1. Zusatzvorrichtung für eine Wäschewasch- und Trockenmaschine mit einem offenen Trocknungskreislauf, einer Ansaugöffnung (9) und einer Auslassöffnung (14), die beide zur Außenumgebung des Wäschetrockners oder der Wasch- und Trockenmaschine offen sind, wobei die Zusatzvorrichtung umfasst:
    einen Luft/Luft-Wärmetauscher (27);
    einen ersten Kanal für einen ersten Luftstrom von einer Einlassöffnung (31) durch den Wärmetauscher (27) zu einer Auslassöffnung (34);
    einen zweiten Kanal für einen zweiten Kühlluftstrom durch den Wärmetauscher (27);
    und die Einlassöffnung (31) und die Auslassöffnung (34) des ersten Kanals können jeweils mit der Auslassöffnung (14) und der Ansaugöffnung (9) des Wäschetrockners oder der Wasch- und Trockenmaschine mit offenem Kreislauf verbunden sein, um diesen, falls nötig, in einen geschlossenen Trocknungskreislauf umzuwandeln, dadurch gekennzeichnet, dass die Zusatzvorrichtung ferner umfasst:
    einen Filter (26);
    ein Gehäuse (24), welches den ersten Kanal für den ersten Luftstrom von der Einlassöffnung (31) durch den Filter (26) und den Wärmetauscher (27) zur Auslassöffnung (34) bildet;
    eine Kondensations-Sammelkammer (29), die in dem Gehäuse (24) ausgebildet ist;
    und dadurch, dass sowohl der Wärmetauscher (27) als auch der Filter (26) abnehmbar innerhalb des Gehäuses (24) angeordnet sind und das Gehäuse abnehmbar am Wäschetrockner oder der Wasch- und Trockenmaschine befestigt ist.
  2. Zusatzvorrichtung nach Anspruch 1, wobei der Filter (26) eine obere Abdeckung (41) mit einem Handgriff (42) umfasst, der es ermöglicht, den Filter aus seinem Gehäuse abzunehmen, um eine periodische Reinigung zu ermöglichen.
  3. Zusatzvorrichtung nach Anspruch 1 oder 2, wobei der Wärmetauscher (27) einen Handgriff (43) umfasst, der es ermöglicht, den Wärmetauscher (27) aus seinem Gehäuse für eine periodische Überprüfung und Reinigung abzunehmen.
  4. Zusatzvorrichtung nach einem der vorhergehenden Ansprüche, umfassend eine Gebläseeinheit (28), die im Gehäuse (24) in Reihe mit dem Wärmetauscher (27) untergebracht ist, um den zweiten Luftstrom zu aktivieren.
  5. Zusatzvorrichtung nach Anspruch 4, wobei das Gehäuse (24) an der Oberseite durch eine abnehmbare Abdeckung (25) geschlossen und mit passenden inneren Rippen und Membranen versehen ist, um den Kassettenfilter (26), den Wärmetauscher (27) und die Gebläseeinheit (28) abnehmbar in Position zu halten.
  6. Zusatzvorrichtung nach Anspruch 5, wobei die Gebläseeinheit (28) eine Einlassöffnung umfasst, die mit einer Ansaugleitung (37) verbunden ist, deren oberes Ende offen ist und mit der Umgebung über ein Gitter (38), das in der abnehmbaren Abdeckung (25) ausgebildet ist, in Verbindung steht.
  7. Zusatzvorrichtung nach Anspruch 6, wobei die Kühlluft des zweiten Luftstroms durch das Gitter (38) angesaugt wird und durch ein zweites Gitter (39) in der Abdeckung (25) in die Umgebung ausgestoßen wird, nachdem sie den Wärmetauscher (27) passiert hat.
  8. Zusatzvorrichtung nach einem der vorhergehenden Ansprüche, wobei der Boden des Gehäuses (24) die Kondensations-Sammelkammer (29) bildet.
  9. Haushalts-Wäschewasch- und Trockenmaschine vom Typ, bei dem Luft, die durch Heizelemente erwärmt wurde, durch eine in einer Waschwanne (2) untergebrachte Wasch-/Trockentrommel (3) mittels einer Ansaugeinheit (8) mit einem ersten Rotor angesaugt wird, um die Flüssigkeit, die von der in der Wäschetrommel (3) vorhandenen Wäsche aufgenommen wurde, zu verdunsten, wobei die Wasch- und Trockenmaschine dadurch gekennzeichnet ist, dass sie umfasst:
    eine Ansaugöffnung (9), die zur Außenumgebung der Wasch- und Trockenmaschine offen ist und mit dem Einlass der Ansaugeinheit (8) verbunden ist und
    eine Auslassöffnung (14), die mit der Waschwanne (2) verbunden ist und zur Außenumgebung offen ist, auf einem höheren Niveau als ein vorbestimmtes maximales Niveau, bis zu welchem die Wanne (2) mit Waschflüssigkeit gefüllt werden kann, dadurch gekennzeichnet, dass die Wäschewasch- und Trockenmaschine eine Zusatzvorrichtung gemäß einem der vorhergehenden Ansprüche umfasst.
  10. Wasch- und Trockenmaschine nach Anspruch 9, in welcher sich die Ansaugöffnung (9) und die Auslassöffnung (14) durch eine Rückwand der Wasch- und Trockenmaschine öffnen.
  11. Wasch- und Trockenmaschine nach Anspruch 9 oder 10, umfassend eine Einrichtung (17, 18) zum Blockieren des Luftstroms durch zumindest die Ansaugöffnung und/oder die Auslassöffnung, wobei diese normalerweise geschlossen sind, aber für eine Trocknerbedingung der Wasch- und Trockenmaschine geöffnet sind.
  12. Wasch- und Trockenmaschine nach Anspruch 11, in welcher die Blockiereinrichtung aus zumindest einer, normalerweise geschlossenen Absperrklappe besteht, welche geöffnet wird durch einen von der Ansaugeinheit erzeugten Druckunterschied stromaufwärts und stromabwärts der Absperrklappe.
  13. Wasch- und Trockenmaschine nach einem der Ansprüche 9 bis 12, in welcher die Ansaugeinheit (8) einen zweiten Rotor mit einer Ansaugöffnung und einer Zufuhröffnung umfasst, die beide zur Außenseite der Wasch- und Trockenmaschine offen sind.
  14. Wasch- und Trockenmaschine nach Anspruch 13, wobei das Gehäuse (24) abnehmbar an der Wasch- und Trockenmaschine und dem zweiten Kanal für Kühlluft, die aus der Umgebung durch den zweiten Rotors angesaugt und durch den Wärmetauscher befördert wird, befestigt ist.
  15. Wasch- und Trockenmaschine nach einem der Ansprüche 9 bis 14, in welcher das Gehäuse (24) an der Rückwand der Wasch- und Trockenmaschine befestigt ist.
EP97200675A 1996-06-26 1997-03-06 Zusatzvorrichtung zum Umwandeln des Trocknungskreislaufs einer mit offenem Trocknungskreislauf Haushaltwaschmaschine in einen geschlossenen Kreislauf mit Luftkondensation des Wasserdampfes Expired - Lifetime EP0816548B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI961294 1996-06-26
IT96MI001294A IT1284442B1 (it) 1996-06-26 1996-06-26 Macchina lavatrice di tipo domestico con circuito di asciugatura aperto e relativa apparecchiatura accessoria di conversione del

Publications (3)

Publication Number Publication Date
EP0816548A2 EP0816548A2 (de) 1998-01-07
EP0816548A3 EP0816548A3 (de) 2003-01-02
EP0816548B1 true EP0816548B1 (de) 2004-08-18

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EP97200675A Expired - Lifetime EP0816548B1 (de) 1996-06-26 1997-03-06 Zusatzvorrichtung zum Umwandeln des Trocknungskreislaufs einer mit offenem Trocknungskreislauf Haushaltwaschmaschine in einen geschlossenen Kreislauf mit Luftkondensation des Wasserdampfes

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EP (1) EP0816548B1 (de)
DE (1) DE69730274T2 (de)
IT (1) IT1284442B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101158101B (zh) * 2006-10-02 2011-04-06 Lg电子株式会社 除异味装置及具有该除异味装置的洗衣机
EP3683352A4 (de) * 2017-09-13 2021-05-26 Qingdao Haier Drum Washing Machine Co., Ltd. Wäschebehandlungsvorrichtung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI294473B (en) * 2002-10-16 2008-03-11 Matsushita Electric Ind Co Ltd Washing and drying machine
EP1650338A3 (de) * 2004-10-22 2006-07-05 LG Electronics, Inc. Wäschetrockner
EP1655405B1 (de) * 2004-11-08 2008-05-21 LG Electronics Inc. Trommelwaschmaschine
US9109317B2 (en) 2009-08-21 2015-08-18 Whirlpool Corporation Controlled moisture removal in a laundry treating appliance
EP2386679B1 (de) * 2010-05-13 2020-07-01 Samsung Electronics Co., Ltd. Wäschetrockner
EP2573253B1 (de) * 2011-09-26 2016-09-07 Electrolux Home Products Corporation N.V. Wärmepumpentrockner
WO2017114631A1 (en) * 2015-12-29 2017-07-06 Arcelik Anonim Sirketi A washer dryer comprising a heating means and the control method thereof
DE102017123318A1 (de) 2017-10-09 2019-04-11 Miele & Cie. Kg Wärmepumpengerät, vorzugsweise Wärmepumpenwäschetrockner oder Wärmepumpenwaschtrockner

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Publication number Priority date Publication date Assignee Title
GB1461073A (en) * 1973-06-01 1977-01-13 Colston Appliances Ltd Washing machine having a hot air dryer
US3937043A (en) * 1974-02-25 1976-02-10 White-Westinghouse Corporation Vapor saving ambient air intake system for a dry cleaner
IT1024157B (it) * 1974-12-18 1978-06-20 Smeg Elettrodonestici S P A Macchina lavabiaucheria con dispositivo asciugatore
DE3017089A1 (de) * 1980-05-03 1981-11-05 Miele & Cie GmbH & Co, 4830 Gütersloh Zum waschen, schleudern und trocknen eingerichtete waeschebehandlungsmaschine
JPS5846997A (ja) * 1981-09-16 1983-03-18 株式会社東芝 乾燥機
ATE112335T1 (de) * 1989-02-03 1994-10-15 Zanker Gmbh Wäschetrockner.
GB2258720A (en) * 1991-08-15 1993-02-17 Creda Ltd Tumble dryer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101158101B (zh) * 2006-10-02 2011-04-06 Lg电子株式会社 除异味装置及具有该除异味装置的洗衣机
EP3683352A4 (de) * 2017-09-13 2021-05-26 Qingdao Haier Drum Washing Machine Co., Ltd. Wäschebehandlungsvorrichtung

Also Published As

Publication number Publication date
EP0816548A2 (de) 1998-01-07
EP0816548A3 (de) 2003-01-02
ITMI961294A1 (it) 1997-12-26
IT1284442B1 (it) 1998-05-21
ITMI961294A0 (de) 1996-06-26
DE69730274T2 (de) 2005-09-08
DE69730274D1 (de) 2004-09-23

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