EP1285986B1 - Washing machine of improved type - Google Patents

Washing machine of improved type Download PDF

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Publication number
EP1285986B1
EP1285986B1 EP01830538A EP01830538A EP1285986B1 EP 1285986 B1 EP1285986 B1 EP 1285986B1 EP 01830538 A EP01830538 A EP 01830538A EP 01830538 A EP01830538 A EP 01830538A EP 1285986 B1 EP1285986 B1 EP 1285986B1
Authority
EP
European Patent Office
Prior art keywords
reservoir
tub
washing machine
water
liquid
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
EP01830538A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1285986A1 (en
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy 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 Candy SpA filed Critical Candy SpA
Priority to ES01830538T priority Critical patent/ES2223767T3/es
Priority to EP01830538A priority patent/EP1285986B1/en
Priority to DE60104546T priority patent/DE60104546T2/de
Publication of EP1285986A1 publication Critical patent/EP1285986A1/en
Application granted granted Critical
Publication of EP1285986B1 publication Critical patent/EP1285986B1/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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • 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 
    • D06F39/20—Arrangements for water recovery

Definitions

  • the present invention relates to a washing machine or washer-drier, of the type comprising a recovery reservoir for the washing water.
  • WO 0042248 From WO 0042248 is known a washing machine with a main tube and a ballast tank located under the main tube. The filling of the main tube with fresh water or washing bath is carried out exclusively via ballast tank. This solution provides a good balancing of the washing machine but the fresh water becomes contaminated by the recovered washing liquid inside the ballast tank.
  • the object of this invention is to provide a washing machine which, while having a relatively low weight, provides excellent characteristics of stability and balancing during operation, obviating the drawbacks of the known solutions.
  • the washing machine according to the present invention has a relatively low weight, when not in operation, enabling it to be transported more easily.
  • the novel arrangement of the elements of the machine provides an additional advantage, in that the user is able to load garments and linen into the tub unit and remove them from it without excessive bending, since the tub unit is in a relatively higher position in this machine.
  • the novel arrangement of the elements of the machine also makes it possible to recover the heat in the environment and that developed during operation, in order to preheat the water which is used, thus providing a corresponding saving in energy.
  • FIGs 1 to 3 show a first embodiment of a washing machine according to the present invention.
  • This washing machine is provided with an outer box-shaped casing 1.
  • a tub unit 10 which houses a spinning drum 12, mounted rotatably on the rear portion of the tub unit 10, and is connected with the exterior of the casing 1 by a closable hatch 15, the closing of which is made watertight by a sealing gasket 16 (shown in Figure 2).
  • the tub unit 10 is supported in an oscillatory way by dampers 17 connected in a known way to the casing 1.
  • a plurality of counterweights 19 is suspended on the lower portion of the tub unit 10, in such a way as to balance the tub unit 10 during operation.
  • An electric motor 20 is also fixed to the lower portion of the tub unit 10, in a median position with respect to the width of the unit, and is interposed between two counterweights 19 placed symmetrically about the vertical plane containing the principal axis of the drum 12.
  • the motor 20 can cause the drum 12 to rotate in a known way, by transmission means 21 (shown in Figure 2), of the belt type for example.
  • the washing machine comprises, within the casing 1, a pair of water reservoirs 31 and 32, whose function is described below, positioned below the tub unit 10.
  • a mains water reservoir 31, having a smaller capacity is mounted on the base of the casing 1, while a recovered water reservoir 32, having a greater capacity, is fixed to the upper surface of the reservoir 31.
  • the reservoirs 31 and 32 are preferably made from synthetic material, for example plastic, and are produced, for example, by moulding or blow moulding, and welded to each other in such a way that there is a separating surface 33 which prevents a direct flow of water between the reservoirs 31 and 32.
  • the two reservoirs 31 and 32 are made and joined together in such a way that the heat exchange surfaces are as large as possible.
  • Housings are formed near the lateral edges of the surface 33 for a first and a second electrically powered pump 41 and 42.
  • Each pump unit 41 and 42 whose operation is described below, comprises a double pump, having two coaxial pump sections, and a water filter capable of completely filtering the solution which is treated.
  • FIGS 1 and 2 show the arrangement of the hydraulic circuit of the reservoir 31 of the washing machine according to the present invention.
  • the reservoir 31 is connected to the external water mains via a solenoid-operated filling valve 51 ( Figure 2), which permits the selective admission of water to the lower reservoir 31.
  • the lower reservoir 31 is also connected, through an aperture 52, to a water supply tube 53, which runs up the rear portion of the casing 1 to a detergent filling holder 54 (shown in greater detail in figures 7 and 8), in which the water can be mixed selectively with the detergent and/or various additives, in a conventional way.
  • the water is discharged by a tube (shown in Figures 7 and 8) into the tub unit 10. It is also possible for the water to reach the tub unit 10 after bypassing, in a known way, the compartments containing detergent or additives of the holder 54.
  • a further detergent holder 54bis ( Figure 2) is inserted in the closable porthole hatch 15. This holder is connected for operation to recycling pipes 59. This additional holder 54bis enables further detergent to be added during recycling. The additional holder 54bis also completes the ideal profile of the porthole hatch.
  • a base portion 55 of the tub unit 10 is connected to an outlet tube 56, which extends downwards to the first pump unit 41.
  • the pump unit 41 which is essentially identical to a conventional drainage pump, is designed in such a way that it can selectively pump the liquid, by means of one or other section of the double pump, along a recycling tube 57 or along a discharge tube 58, both connected to the said pump unit.
  • the recycling tube 57 extends upwards along the rear portion of the casing 1, and is then connected to the tub unit 10 through a pipe 59 located near the hatch 15.
  • the pipe 59 supplies the additional holder 54bis described above.
  • the discharge tube 58 extends along the rear portion of the casing 1 to the external drainage network.
  • FIGS 1 and 3 show the arrangement of the hydraulic circuit of the upper reservoir 32 of the washing machine according to the present invention.
  • the reservoir 32 is connected to the pump unit 42, which is designed in such a way that it can draw the liquid from this reservoir, by means of a first section of the double pump, and pump it along a delivery siphon 61 to the tub, this siphon extending upwards along one side of the casing 1, reaching a point above the filling level of the liquid in the tub unit (10).
  • the tube 61 is then connected to the tub unit 10 through an aperture 62.
  • the base portion 55 of the tub unit 10 is connected to a recovery tube 63, which extends downwards to the second pump unit 42.
  • the pump unit 42 is designed to be able to pump the liquid, by means of a second section of the double pump, along a delivery siphon 64 to the upper reservoir, this siphon extending upwards along the rear portion of the casing 1, reaching a point above the filling level of the liquid in the tub unit 10, and closing the recovery circuit.
  • the operation of the washing machine according to the present invention is controlled conventionally by an electronic control unit, indicated schematically by the number 70, which can be used to set different programs according to the different washing conditions.
  • the control unit opens the solenoid valve 51, allowing the external mains water to fill the lower reservoir 31, the supply tube 53, and also, partially, the tub unit 10.
  • the tub unit 10 can be filled partially, to a predetermined level, after the recovery reservoir 32 has been filled through the recovery tube 63, the pump unit 42, and the tube 64 for delivery to the reservoir.
  • the reaching of the predetermined level of fluid in the tub 10 can be programmed by means of the entry of water through the reservoir 31, or also through the reservoir 32 for recovering the quantity of water which has been stored in advance.
  • some water is always present in the reservoirs 31 and 32 during the spinning operations, which require high rotation speeds of the washing drum.
  • the control unit operates to divert the flow of water, by preventing its flow through the compartments of the holder 54 containing detergent and/or additives, in such a way that the water reaching the reservoir 32 is essentially pure; when the reservoir 32 has been filled, on the other hand, the water is introduced into the tub unit 10 after being made to pass through the compartments of the holder 54 containing detergent and any necessary additives.
  • Conventional heating means heat the water flowing into the tub unit 10 to a predetermined temperature; some of this heated water flows into the upper reservoir 32. The heat is then partially transmitted from the reservoir 32, through the separating surface 33, to the fresh water present in the reservoir 31, thus pre-heating it for any requisite further use during operation.
  • the washing liquid flowing out of the tub unit 10 through the outlet tube 56 is made to recirculate through the recycling tube 57, and is then reintroduced into the tub unit 10, thus increasing the washing efficiency.
  • liquid delivered from the pump unit 41 is sent, not into the recycling tube 57, but into the discharge tube 58 to discharge the dirty liquid to the exterior, until the tub unit 10 is emptied.
  • a first section of the pump unit 42 delivers the water from the reservoir 32 along the tub delivery siphon 61 into the tub unit 10.
  • the water present in the reservoir 32 forms an additional balance weight for the washing machine which is required to stabilize the structure during operation, and especially during the spinning stage.
  • the pump unit 41 is turned on to discharge the water to the exterior through the discharge tube 58, until the tub unit 10 is emptied, and the reservoir 32 is also emptied by interaction with the pump unit 42. It is also possible to specify a case in which the recovery of clean water, for example the water from the final rinse, is specifically carried out in advance, so that it can be stored in the recovery reservoir.
  • the presence of the weight of water in the reservoirs 32 during the operation of the machine provides the necessary stability and advantageously enables the weight of the counterweights 19 to be reduced by comparison with conventional solutions.
  • any water present in the reservoir 31 is heated naturally to the ambient temperature. Consequently, the fact that water remains in the reservoir 31 enables the ambient temperature to be utilized, providing a saving of approximately 8°C for example.
  • FIGS 3 to 6 show a second embodiment of a washing machine according to the present invention.
  • the elements corresponding to those of Figures 1 to 3 are indicated with the same numerical references, while those which are different are indicated with an apostrophe.
  • the arrangement of the components and the plumbing connections are essentially similar to those of the first embodiment, except for the pair of water reservoirs located under the tub unit 10.
  • a mains water reservoir 31' having a smaller capacity, is made integral with the tub unit 10, being fixed to the bases of the counterweights 19, while a recovered water reservoir 32', having a greater capacity, is fixed to the lower surface of the reservoir 31'.
  • the reservoir 31' Since it is now in a significantly higher position and above the reservoir 32', the reservoir 31' is not in this case connected to the solenoid-operated filling valve 51 directly, but is connected through a filling tube 52'.
  • the functions of the reservoirs 31' and 32' are essentially the same, and in particular the heat exchange between them takes place through a separating surface 33'.
  • the motor 20 is in this case essentially in contact with the upper reservoir 31', enabling the heat dissipated by this motor to be recovered during operation to additionally pre-heat the fresh water in the reservoir 31', thus providing an additional relative saving in energy.
  • a plurality of fins 81' can be placed on the contact surface between the motor 20 and the upper reservoir 31'. These fins, being immersed in the water in the reservoir 31, improve the transmission of heat from the motor 20 to the upper reservoir 31'.
  • the reservoirs 31' and 32' are fixed directly to the tub unit 10, it is possible to provide directly for the containment of the oscillations of this unit, which can be improved by making these reservoirs in a shape which takes into account the distribution of the loads during the oscillations of the tub unit 10.
  • the weight of the counterweights 19 can be further decreased by 50% with respect to conventional machines.
  • FIG. 7 shows a third embodiment of a washing machine according to the present invention.
  • the elements corresponding to those of Figures 1 to 6 are indicated with the same numerical references, while those which are different are indicated with a double apostrophe.
  • a single reservoir 32'' is made integral with the tub unit 10, being fixed to the bases of the counterweights 19.
  • the fresh water enters the washing machine through the solenoid-operated filling valve 51, which in this case is located in the upper portion of the casing 1, and flows directly into the detergent holder 54. Passing through this holder, the water is sent into the tub unit 10.
  • the arrangement of the remaining components and the plumbing connections are essentially similar to those of the second embodiment, except for a recycling tube 57'', which, as in the first two embodiments, departs from the pump unit 41, but terminates in the detergent holder 54.
  • the recycled water can be additionally mixed with the detergent during the washing stage.
  • there is a pipe which connects the reservoir 32'' directly to the tub unit 10, to act as an overflow device.
  • the single reservoir 32'' essentially has the same functions as those of the separate reservoirs 31' and 32', but cannot be used to pre-heat the supplied fresh water, since it is not connected directly to the exterior. However, this single reservoir can be used to pre-heat the water which is subsequently recovered and stored in it.
  • a connection of this type is provided in a fourth embodiment, shown in Fig. 8.
  • the elements corresponding to those of Figures 1 to 7 are indicated with the same numerical references, while those which are different are indicated with a triple apostrophe.
  • the arrangement of the components and the plumbing connections are essentially identical to those of the third embodiment, but the direct connection between the solenoid-operated filling valve 51 and the reservoir 32'' is formed by means of a bypass tube 91'''.
  • the fresh water entering through the solenoid-operated valve 51 can be diverted so that it passes directly into the reservoir 32'' instead of into the holder 54. This diversion is carried out with known means, operated by the control unit 70.
  • fresh water is pre-heated in the reservoir 32'', by mixing with the hot water which is already present in it.
  • the control unit can then add water at ambient temperature to the water stored in the reservoir 32''.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP01830538A 2001-08-14 2001-08-14 Washing machine of improved type Expired - Lifetime EP1285986B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES01830538T ES2223767T3 (es) 2001-08-14 2001-08-14 Maquina lavadora de tipo mejorado.
EP01830538A EP1285986B1 (en) 2001-08-14 2001-08-14 Washing machine of improved type
DE60104546T DE60104546T2 (de) 2001-08-14 2001-08-14 Verbesserte Waschmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01830538A EP1285986B1 (en) 2001-08-14 2001-08-14 Washing machine of improved type

Publications (2)

Publication Number Publication Date
EP1285986A1 EP1285986A1 (en) 2003-02-26
EP1285986B1 true EP1285986B1 (en) 2004-07-28

Family

ID=8184660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01830538A Expired - Lifetime EP1285986B1 (en) 2001-08-14 2001-08-14 Washing machine of improved type

Country Status (3)

Country Link
EP (1) EP1285986B1 (es)
DE (1) DE60104546T2 (es)
ES (1) ES2223767T3 (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1710343A1 (de) 2005-04-04 2006-10-11 Miele & Cie. KG Frontbeschickbare Wäschebehandlungsmaschine wie Waschmachine, Wäschetrockner oder Waschtrockner
US11242645B2 (en) 2018-11-16 2022-02-08 Whirlpool Corporation Laundry treating appliance having a door assembly

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040244121A1 (en) * 2003-06-09 2004-12-09 Lg Electronics Inc. Mono-tub drum-type washing machine and method for controlling the same
JP4368661B2 (ja) * 2003-11-07 2009-11-18 パナソニック株式会社 ドラム式洗濯機
JP2009517111A (ja) * 2005-11-25 2009-04-30 アンドリュー リーズン リミテッド 洗浄機器
DE102008012191A1 (de) 2008-03-03 2009-09-10 Miele & Cie. Kg Frontbeschickbare Waschmaschine
ES2470496B1 (es) * 2012-12-20 2015-03-31 Bsh Electrodomésticos España, S.A. Aparato doméstico con un reservorio
IT201900005524A1 (it) * 2019-04-10 2020-10-10 J P Ind S P A Macchina lavatrice con sistema di contrappeso idraulico.
DE102023200169A1 (de) 2023-01-11 2024-07-11 BSH Hausgeräte GmbH Haushaltsgerät zur Pflege von Wäschestücken mit herausnehmbaren Gewichtskörpern und Verfahren zum Verändern eines Gewichts eines Haushaltsgeräts

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078702A (en) * 1959-05-25 1963-02-26 Mc Graw Edison Co Combination washing and drying machine
DE1871621U (de) * 1963-02-23 1963-05-09 Rudolf Grosse Voll- oder teilautomatische elektrische waschmaschine.
AT284760B (de) * 1968-02-13 1970-09-25 Zanussi A Spa Industrie Vorrichtung zur Stabilisierung des Standes bzw. zur Erhöhung der Standfestigkeit einer Waschmaschine od.dgl.
FR2626588B1 (fr) * 1988-01-28 1991-04-26 Martinez Georges Machine a laver le linge dont la cuve est equipee d'elements de lestage
IT1263763B (it) * 1993-01-19 1996-08-29 Candy Spa Macchina lavatrice, per biancheria o stoviglie,a parcheggio di liquido
DE19745824A1 (de) * 1997-10-16 1999-04-22 Bosch Siemens Hausgeraete Spülfunktionen durchführendes Haushaltgerät
PL188488B1 (pl) * 1999-01-15 2005-02-28 Amica Wronki Sa Sposób hydraulicznego balastowania bębna wirującego pralki automatycznej zwłaszcza domowej i pralkaautomatyczna zwłaszcza domowa

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1710343A1 (de) 2005-04-04 2006-10-11 Miele & Cie. KG Frontbeschickbare Wäschebehandlungsmaschine wie Waschmachine, Wäschetrockner oder Waschtrockner
DE102005015551A1 (de) * 2005-04-04 2006-10-19 Miele & Cie. Kg Frontbeschickbare Wäschebehandlungsmaschine wie Waschmaschine, Wäschetrockner oder Waschtrockner
DE102005015551B4 (de) * 2005-04-04 2008-08-07 Miele & Cie. Kg Frontbeschickbare Wäschebehandlungsmaschine wie Waschmaschine, Wäschetrockner oder Waschtrockner
US11242645B2 (en) 2018-11-16 2022-02-08 Whirlpool Corporation Laundry treating appliance having a door assembly
US11982042B2 (en) 2018-11-16 2024-05-14 Whirlpool Corporation Laundry treating appliance having a door assembly

Also Published As

Publication number Publication date
EP1285986A1 (en) 2003-02-26
DE60104546T2 (de) 2005-09-15
ES2223767T3 (es) 2005-03-01
DE60104546D1 (de) 2004-09-02

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