EP2860301B1 - Washing machine - Google Patents

Washing machine Download PDF

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Publication number
EP2860301B1
EP2860301B1 EP14187879.3A EP14187879A EP2860301B1 EP 2860301 B1 EP2860301 B1 EP 2860301B1 EP 14187879 A EP14187879 A EP 14187879A EP 2860301 B1 EP2860301 B1 EP 2860301B1
Authority
EP
European Patent Office
Prior art keywords
cleaning agent
ejector
duct
washing machine
washing
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.)
Active
Application number
EP14187879.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2860301A1 (en
Inventor
Aldo 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
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Filing date
Publication date
Application filed by Candy SpA filed Critical Candy SpA
Publication of EP2860301A1 publication Critical patent/EP2860301A1/en
Application granted granted Critical
Publication of EP2860301B1 publication Critical patent/EP2860301B1/en
Active 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • 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 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/085—Arrangements or adaptations of pumps
    • 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 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/086—Arrangements for avoiding detergent wastage in the discharge conduit

Definitions

  • the present invention relates to a device and method for washing laundry, particularly a household washing machine.
  • the household washing machines comprise a support structure and a housing, inside which a washing tub is housed, which is provided with a front opening that can be closed by a porthole door frontally hinged to the housing.
  • a basket to receive the laundry to be subjected to the washing operation is housed inside the washing tub, in a rotatable manner about a horizontal or inclined axis.
  • the basket also defines a front opening arranged at the washing tub opening, in order to be able to carry out the laundry loading and unloading.
  • the washing tub is suitable to hold the washing liquid during the laundry washing steps.
  • a system for loading the washing water is provided for, which is connectable to the water supply system.
  • a drain duct is provided for on the washing tub bottom, with an associated drain pump that provides for the removal of the washing liquid from the tub and that controls, together with the loading system, the liquid level inside the tub.
  • an electric resistor is provided for, which is arranged inside the tub in the interspace between the tub wall and the laundry basket.
  • washing and washer-dryer machines of the prior art and the washing and drying methods implemented thereby, while being satisfactory from several aspects, are bulky and have a high consumption of water, electric power, and cleaning agent.
  • ejectors which use the Venturi effect of a converging-diverging nozzle to convert the pressure energy of a driving fluid into velocity energy, which, in turn, creates a low pressure that draws and drags a driven fluid.
  • the driving fluid and the dragged driven fluid may be liquids or gases.
  • Fig. 8 schematically illustrates a typical ejector with an inlet nozzle 1 for the driving fluid, a section opening 2 for the driven fluid, and a convergent-divergent outlet nozzle 3 for the flow of the mixed driying and derive fluids.
  • the main object of the present invention is to provide a washing machine, as well as a wishing method, which use an ejector (jet pump) for the recirculation of the washing liquid, and which are configured so as to reduce the consumption of water, cleaning agent, and electric power.
  • DE7735078 U1 describes a laundry machine with a device for flushing an additional agent into a wash tab, and represents a closest state of the are for the present invention.
  • a further object of the invention is to provide a washing machine with an improved water and cleaning agent supply system.
  • a washing machine comprising:
  • At least one further supply duct is provided that is connectable to the water supply system by the first supply valve or by a further supply valve and in flow communication with the cleaning agent compartment, bypassing the ejector.
  • the second recirculation duct connects the outlet opening of the ejector in flow communication with the cleaning agent compartment which in turn is in flow communication with an upper region of the laundry basket.
  • a third recirculation duct (27) connects in flow communication the outlet opening (3) of the ejector (20) to the laundry basket (8), bypassing the cleaning agent compartment (11).
  • a washing machine 4 or washer-dryer machine intended as a particular embodiment of the washing machine, comprises a support and housing structure 5, inside which a washing tub 6 is housed, which is provided with a front opening that is closable by a porthole door 7 frontally hinged to the housing.
  • a basket 8 to receive the laundry to be subjected to the washing operation is housed inside the washing tub 6, in a rotatable manner about a horizontal or inclined axis.
  • the basket 8 also defines a front opening arranged at the washing tub 6 opening, in order to be able to carry out the laundry loading and unloading.
  • the washing tub 6 is suitable to hold the washing liquid during the laundry washing steps.
  • washing water loading system may comprise a plurality of water flow paths, extending, for example, from two supply electrovalves 9, 10, through respective cleaning agent compartments 11 of a cleaning agent container 12, up into the washing tub 6.
  • a drain duct 14 connects to the bottom 13 of the washing tub 6, with associated drain pump 15 which provides for the removal of the washing liquid from the tub 6 and which controls, together with the supply electrovalves 9, 10 the liquid level within the tub 6.
  • an electric coil resistor 40 may be provided for, which is arranged inside the tub 6, particularly on the tub bottom 13, in the interspace between the wall of the tub 6 and the laundry basket 8.
  • the laundry basket 8 may be actuated in rotation by an electric motor 16 and a transmission 17.
  • the operation of the washing machine is controlled by an electronic, electric, or electro-mechanical control unit 18, operatively connected to a user control interface 19 which is located at an outer wall of the support structure 5 and which allows selecting the washing cycles and the characteristics thereof.
  • a user control interface 19 which is located at an outer wall of the support structure 5 and which allows selecting the washing cycles and the characteristics thereof.
  • the control unit 18 drives the various components of the washing machine 4.
  • the washing machine 4 further comprises a recirculation system of the washing liquid with an ejector (jet pump) 20 having an inlet opening 1, a suction opening 2, and an outlet opening 3.
  • ejector jet pump
  • the inlet opening 1 is in flow communication with a first supply duct 21 extending from the first supply electrovalve 9 which, in turn, is connectable to the water supply system.
  • a first recirculation duct 22 connects in flow communication the bottom 13 of the washing tub 6 with the suction opening 2 of the ejector 20.
  • a second recirculation duct 23 connects in flow communication the outlet opening 3 of the ejector 20 to the laundry basket 8 and includes the cleaning agent compartment 11 ( Figs. 1 , 3 , 5 , 9 , 11 ).
  • the second recirculation duct 23 connects the outlet opening 3 of the ejector 20 in flow communication with the laundry basket 8, bypassing the cleaning agent compartment 11 ( Figs. 13, 14 ).
  • a third recirculation duct 27 connects in flow communication the outlet opening 3 of the ejector 20 to the laundry basket 8, bypassing the cleaning agent compartment 11 of the cleaning agent drawer 12.
  • a first grid water flow 24 in the first supply duct 21 forms the driving fluid for the ejector 20
  • a recirculation flow 25 in the first recirculation duct 22 is the driven fluid that is suctioned by the ejector 20.
  • the second recirculation duct 23 carries a first partial flow 26 of the mixture of grid water and recirculated liquid. Said first partial flow 26 passes through the cleaning agent compartment 11 (so as to mix with a cleaning agent or cleaning additive contained in the cleaning agent compartment upon the passage of the first partial flow 26) before arriving to the laundry basket 8.
  • the third recirculation duct 27 carries a second partial flow 28 of the mixture of grid water and recirculated liquid. Said second partial flow 28 is isolated from the cleaning agent in the cleaning agent drawer 12 and goes directly back to the laundry basket 8 ( Fig. 1 ).
  • the recirculation system operates in the following manner: when the first supply valve 9 is opened, the pressurized grid water enters the ejector 20 which, by applying a vacuum, begins to suction water and the cleaning agent (recirculation flow 25) from the tub bottom 13. Part of the mix of water and cleaning agent arrives partially (through the second recirculation duct 23) inside the cleaning agent compartment 11 and partially sprinkles the laundry in the laundry basket 8 through the third recirculation duct 27 which extends externally to the cleaning agent drawer 12 and which is directly connected to a front joint 29 at the loading opening of the laundry basket 8.
  • the ejector may have a double outlet opening 3 or an outlet opening 3 with a Y-shaped bifurcation, or the second recirculation duct 23 is connected to the outlet opening 3 of the ejector 20 and the third recirculation duct 27 is branches off from the second recirculation duct 23 in a point upstream of the cleaning agent compartment 11.
  • the second recirculation duct 27 may form a spraying nozzle 36 or a plurality of dispensing openings, which spray or dispense the first partial flow 26 into the cleaning agent compartment 11.
  • the washing machine 4 comprises at least one further supply duct 30, 30' connectable to the water supply system by the first supply valve 9 or by a further supply valve 10, and in flow communication with the cleaning agent compartment 11, bypassing the ejector 20.
  • the further supply duct can include a second supply duct 30 which connects the second supply electrovalve 10 in flow communication with the cleaning agent compartment 11 of the cleaning agent drawer 12, so that, by opening the second supply valve 10, the second supply duct 30 brings a second grid water flow 31 into the cleaning agent compartment 11 so that it is mixed with a cleaning agent or cleaning additive contained in the cleaning agent compartment 11 upon the passage of the second grid water flow 31.
  • the second grid water flow 31 also passes from the cleaning agent drawer 12 into the laundry basket, for example, by means of a single loading duct 34 that connects an outlet opening 32 of the cleaning agent drawer 12 with a tub loading opening 33 formed in an upper region of the washing tub 6.
  • the second supply valve 10 may be actuated independently from the first supply valve 9, and the second grid water flow 31 does not actuate the ejector 20, whereby the water recirculation and supplying functions can be carried out in a selective and independent manner.
  • the at least one further supply duct 30, 30' can include a third supply duct 30' branched off from the first supply duct 21 upstream of the ejector 20 and in flow communication with the cleaning agent compartment 11 ( Figs. 12 , 14 ).
  • the ejector 20 is arranged within the cleaning agent container 12.
  • the ejector is located in an upper zone of the cleaning agent container 12 to exploit the force of gravity for the purpose of conveying the flows.
  • the ejector 20 is formed in an upper wall 35 or upper lid of the cleaning agent container 12.
  • the ejector 20 may be injection molded together with at least one portion of the upper wall or lid 35.
  • the third recirculation duct 27 has an approximately upright length, with an air gap 39 formed between an upper tube end 37 and a lower tube end 38 aligned with and facing the upper tube end 37, so as to prevent a backflow of contaminated water to the grid in the case where a vacuum were applied.
  • the upper tube end 37 is tapered downwardly in a converging manner and forms a converging nozzle that accelerates the second partial flow 28 so as to create a liquid sheet with a jet having a reduced width in outlet.
  • the air gap height i.e., the vertical distance between the tube ends 37, 38, may range from 2mm to 5mm.
  • An inlet opening of the first recirculation duct 22 may be connected, for example, to the tub bottom 13 or to the drain duct 14 upstream of the drain pump 15.
  • the laundry basket 8 has a loading opening 41, for example, a casement loading opening, formed in a side wall of the basket 8 and that can be overlapped by an upper opening 42 of the washing tub 6 and the support structure 5, which may be closed and opened by a hinged lid 43.
  • the cleaning agent container 12 may be preferably formed or connected directly to the hinged lid 43 and it is arranged in flow connection with the several ducts at least when the lid 43 is closed (machine operative state).
EP14187879.3A 2013-10-11 2014-10-07 Washing machine Active EP2860301B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001678A ITMI20131678A1 (it) 2013-10-11 2013-10-11 Macchina lavabiancheria

Publications (2)

Publication Number Publication Date
EP2860301A1 EP2860301A1 (en) 2015-04-15
EP2860301B1 true EP2860301B1 (en) 2016-11-02

Family

ID=49725223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14187879.3A Active EP2860301B1 (en) 2013-10-11 2014-10-07 Washing machine

Country Status (5)

Country Link
EP (1) EP2860301B1 (zh)
CN (1) CN104562566B (zh)
ES (1) ES2605603T3 (zh)
IT (1) ITMI20131678A1 (zh)
RU (1) RU2672030C2 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180135229A1 (en) * 2016-11-17 2018-05-17 Haier Us Appliance Solutions, Inc. Washing machine appliance and a method for operating a washing machine appliance
WO2022225898A1 (en) * 2021-04-19 2022-10-27 Decon Water Technologies, LLC Industrial laundry systems and methods

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3406710A (en) * 1964-05-01 1968-10-22 Whirlpool Co Pump control for dispensing liquid additives
DE7735078U1 (de) * 1977-11-16 1978-05-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Waschmaschine mit Zusatzmitteleinspülvorrichtung in einen Laugenbehälter
US6820821B2 (en) * 2001-04-13 2004-11-23 S.C. Johnson & Son, Inc. Automated cleansing sprayer
CN100509213C (zh) * 2007-04-24 2009-07-08 昆明理工大学 制备颗粒增强金属基表面复合材料的真空实型铸渗方法
DE102007028214A1 (de) * 2007-06-20 2008-12-24 BSH Bosch und Siemens Hausgeräte GmbH Automatisch gesteuerte Waschmaschine
EP2241669B1 (en) * 2009-04-09 2014-06-18 Electrolux Home Products Corporation N.V. Washing machine with an improved washing/rinsing-liquid inlet circuit
US8166591B2 (en) * 2010-12-09 2012-05-01 General Electric Company Apparatus and method for wash fluid recirculation in a washing machine
US9051676B2 (en) * 2011-03-30 2015-06-09 General Electric Company Apparatus and method for utilizing a venturi effect in a dispenser
US20140109620A1 (en) * 2011-11-02 2014-04-24 Dongbu Daewoo Electronics Corporation Water supply apparatus for washing machine

Also Published As

Publication number Publication date
ES2605603T3 (es) 2017-03-15
CN104562566A (zh) 2015-04-29
CN104562566B (zh) 2018-05-04
RU2672030C2 (ru) 2018-11-08
EP2860301A1 (en) 2015-04-15
RU2014141031A3 (zh) 2018-05-11
RU2014141031A (ru) 2016-04-27
ITMI20131678A1 (it) 2015-04-12

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