EP2719814A1 - Wäschewaschmaschine mit verbesserter Waschmittelaktivierung - Google Patents

Wäschewaschmaschine mit verbesserter Waschmittelaktivierung Download PDF

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Publication number
EP2719814A1
EP2719814A1 EP12425164.6A EP12425164A EP2719814A1 EP 2719814 A1 EP2719814 A1 EP 2719814A1 EP 12425164 A EP12425164 A EP 12425164A EP 2719814 A1 EP2719814 A1 EP 2719814A1
Authority
EP
European Patent Office
Prior art keywords
drum
tub
nozzles
machine
detergent
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.)
Withdrawn
Application number
EP12425164.6A
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English (en)
French (fr)
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
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 EP12425164.6A priority Critical patent/EP2719814A1/de
Priority to RU2013143056A priority patent/RU2635974C2/ru
Priority to CN201310467536.XA priority patent/CN103774381A/zh
Publication of EP2719814A1 publication Critical patent/EP2719814A1/de
Withdrawn legal-status Critical Current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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/266—Gaskets mounted between tub and casing around the loading opening
    • 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

Definitions

  • the present invention relates to a laundry washing machine with enhanced detergent activation.
  • laundry washing machine is intended to designate any machine adapted to perform washing operations on laundry, irrespective of the possibility of also drying the washed laundry or not. Therefore, in the present disclosure and annexed claims, combination washer/dryer machines are also intended to be covered by the definition of laundry washing machines.
  • the laundry washing machine of the present invention is of the type that comprises a tub containing a drum for receiving the laundry to be washed, which is rotated about an axis of rotation, a detergent compartment in fluid communication with a liquid source, a supply pipe extending between the detergent compartment and the tub, for a mixture of liquid and detergent to flow into the tub, a recirculation circuit extending between a bottom area of the tub and a plurality of delivery nozzles facing into the drum to draw liquid from the bottom of the tub and feed it back into the drum, a control and monitoring unit designed to cause a given amount of liquid and detergent mixture to flow into the tub and to recirculate the mixture for a period of time T by rotating the drum at a speed V.
  • the operating cycle is known to comprise a starting step of duration T, in which a flow of detergent is created, one dose of such detergent, in powder, granule or liquid form, being loaded in the detergent compartment.
  • a first, relatively small amount of liquid, typically water, is fed to such compartment, to cause the detergent dose to flow from the detergent compartment to the tub of the machine.
  • the total amount of liquid in the tub, in the preliminary step of the washing cycle, also known as detergent activation step, does not generally exceed 5 liters.
  • the detergent dose used with a conventional laundry load of 5 kg is typically about 150 g, the concentration of detergent in the liquid in this step of the cycle reaches 30 g/liter.
  • the detergent would be distributed through the laundry mainly during the next steps of the washing cycle.
  • an additional amount of liquid is added to the initial amount, which increases the total amount to about 15 liters, and decreases detergent concentration from the initial 30 grams/liter to about 10 grams/liter.
  • Detergent distribution on the laundry is completed at a concentration well below the concentration that would be available initially, as detergent is being fed into the tub, which will lead to a lower detergent effectiveness on any spots on the laundry to be washed.
  • the present invention is based on the problem of optimized utilization of detergent effectiveness on laundry fabrics starting from the first step of the operating cycle of the machine, i.e. when the detergent is dissolved in its compartment in a relatively small amount of water and is recirculated while its concentration in the liquid is relatively higher than the concentration found in the later washing steps of the machine.
  • numeral 1 generally designates a laundry washing machine with enhanced detergent activation of the present invention.
  • the machine 1 comprises a washing tub 2 containing a drum 3 for holding the laundry to be washed, which is designed to rotate about an axis of rotation X.
  • An electric motor 4 (schematically shown in the figures) is operatively connected to the drum 3 to rotate it about the axis X.
  • the drum 3 is mounted to the frame 1a of the machine in a conventional manner to be able to rotate at various speeds and in various directions, as is peculiar to a laundry washing machine.
  • the drum 3 conventionally has a cylindrical wall with through holes 3b and ribs 3c for satellite-like motion and distribution of the laundry load during drum rotation.
  • a detergent compartment 5, in which a dose of detergent in powder, tablet or liquid form is loaded, is put in fluid communication with a source of liquid, preferably mains water, through a supply pipe 6.
  • a supply pipe 7 extends between the detergent compartment 5 and the tub 2 to feed a mixture of liquid and detergent to the tub 2.
  • the drum 3 and the tub 2 have respective openings 3a, 2a for introduction and removal of the laundry into and from the machine. These openings 2a, 3a are engaged by a door 8, which is pivotally joined to the frame 1a of the machine, to be opened and closed, thereby opening and closing the openings 2a, 3a.
  • an elastic coupling 9 is constrained between the structure 1a and the tub 2.
  • the elastic coupling (see Figure 2 ) operates between the door 8 and the tub 2, such that when the door is closed it will sealingly contact the elastic coupling 9.
  • the elastic coupling 9 has a series of loops, allowing it to fit the opening 2a of the tub 2, thereby ensuring the required fluid tightness.
  • a recirculation circuit 10 extends between a bottom area of the tub 2 and a plurality of delivery nozzles 11 facing into the drum 3, for drawing liquid from the bottom of the tub 2 and reintroduce it into the drum 3.
  • the recirculation circuit 10 comprises a discharge line 12 extending from the bottom area of the tub 2 to a liquid collecting tank 13 and a pump 14 in fluid communication with the tank 13 for drawing the fluid therefrom and conveying it into an inflow line 14 extending between the pump 14 and the delivery nozzles 11.
  • the recirculation pump 14 is further equipped with a filter 14a of conventional type for stopping any solid body (buttons, coins and the like) that flow out of the tub 2 and prevent reintroduction thereof into the drum 3.
  • a drain pump 20 is put in fluid communication with the tank 13 and with a drain line 21.
  • the recirculation pump 14 is constantly flooded (due to its fluid connection with the tank 13).
  • the recirculation pump 14 and the drain pump 20 operate alternately, which means that they never operate simultaneously.
  • the recirculation pump 13 when the recirculation pump 13 operates to reintroduce fluid into the drum 3, the drain pump 20 is idle, whereas when the drain pump 20 operates for fluid drainage, the recirculation pump 13 is idle.
  • the recirculation pump 14 and the drain pump 20 are shown as being integrated in a single body, but the two pumps may form two distinct bodies.
  • the nozzles 11 are in such an arrangement that the projection of the delivery directions E in a vertical plane containing the axis of rotation X of the drum 3 are inclined at an angle A ranging from 30° to 80°, preferably from 40° to 60°, more preferably about 50° from the axis of rotation X of the drum 3 (see Figure 2 that shows a section of the elastic coupling on a plane that passes through the center of the drum and one of the nozzles).
  • the projections of the delivery directions E on a plane perpendicular to the axis of rotation X of the drum 3 i.e. the plane substantially containing the door 8) substantially converge into a point placed in a central area of the drum 3.
  • the nozzles 11 spray liquid to a central and deep portion of the drum 3.
  • delivery direction related to nozzles is intended to indicate the bisector of the angle of the nozzle jet.
  • Such jet has a spray angle ranging from 10 ° to 30°, preferably about 20°.
  • the nozzles 11 are directly formed in the elastic coupling 9.
  • the nozzles 11 are formed in a loop of the elastic coupling 9.
  • the nozzles 11 are arranged in two sets 11a of nozzles, each comprising a plurality of nozzles 11.
  • each set 11a of nozzles 11 comprises four nozzles.
  • the two sets of nozzles are placed in symmetric positions with respect to a vertical axis passing through the center of the drum 3.
  • each set 11a of nozzles 11 is placed on the elastic coupling 9 at an angular distance B ranging from 0° to 45°, preferably about 15°, from a horizontal axis X1 passing through the elastic coupling 9 and contained in a plane passing through the center of the drum 3 (see Figure 1 ).
  • the two sets 11a of nozzles are placed in the half of the elastic coupling 9 that faces the recirculation pump 14.
  • the elastic coupling comprises an opening 16 that puts the inner side of the elastic coupling 9, i.e. the part facing the interior of the tub 2, in fluid communication with the outer side of the elastic coupling 9, i.e. the side facing toward the environment external to the tub 2.
  • a plurality of partitions 17 are arranged in each opening 16, to form a plurality of channels 18 through which the recirculated fluid is fed into the drum 3.
  • the number of channels 18 is equal to the number of nozzles 11, whereas the number of partitions is equal to the number of channels less one (see Figure 3 , showing a plan view of one portion of the elastic coupling).
  • a connecting sleeve 19 is provided, for each set of nozzles, at the outer portion of the elastic coupling 9, and is preferably integral with the elastic coupling 9.
  • the connecting sleeve 19 is engaged by the inflow line 15 such that the recirculation fluid flows through the elastic coupling 9 and is delivered into the drum 3.
  • the inflow line 15 has a Y shape, and has an inlet connected to the recirculation pump 14 and two outlets each connected to a connecting sleeve 19 at the corresponding set of nozzles.
  • a substantially curved manifold is provided, in fluid communication with the recirculation circuit, the nozzles being arranged on such manifold.
  • the manifold is joined at least at one point to the elastic coupling 9 and conforms with its profile.
  • the manifold has the shape of a sector of a circle and extends along the elastic coupling through about 270°.
  • the nozzles are arranged along the manifold in nozzle sets.
  • the machine 1 further comprises a control and monitoring unit 22 (as schematically shown in the annexed figures), which is operatively connected to the recirculation pump 14, the drain pump 20 and the electric motor 4 for controlled actuation thereof.
  • a control and monitoring unit 22 (as schematically shown in the annexed figures), which is operatively connected to the recirculation pump 14, the drain pump 20 and the electric motor 4 for controlled actuation thereof.
  • control unit 22 is designed to feed a given amount of mixture of liquid and detergent into the tub 2, and to recirculate the mixture for a period of time T, by rotating the drum at a speed V, thereby carrying out a detergent distribution and actuation step, during which the laundry is wetted. It shall be noted that, after the time T, the control and monitoring unit 22 executes a conventional washing cycle.
  • a preliminary amount of water to about five liters, is caused to reach the compartment 5 that contains the detergent dose to dilute the latter to a concentration of about 30 g/liter.
  • the drum 3 is rotated at the speed V, usually ranging from 75 revolutions/minute to 120 revolutions/minute, to allow laundry distribution within the drum 3 and separation of the pieces that form the laundry load to be washed.
  • the liquid with detergent is distributed over the laundry which is initially dry and absorbs it, thereby reducing the amount of liquid available for recirculation.
  • the control and monitoring unit 22 is designed to increase the rotation speed of the drum 3 to a speed V1 > KV for a time t shorter than the time T, where K is a multiplication factor whose value is sufficient to cause the laundry to be at least partially wrung out by centrifugal effect.
  • the at least partial wringing out of the laundry by centrifugal effect requires the drum 3 to rotate at such a speed as to allow at least a part of liquid retained by the wetted laundry to be wrung out of it.
  • the multiplication factor K is a number, not necessarily an integer, greater than 2.
  • the rotation speed of the drum is higher than 300 revolutions/minute.
  • control unit 22 is designed to actuate the recirculation circuit 10 to spray the interior of the drum 3, and hence the laundry, with recirculated liquid through the plurality of delivery nozzles 11.
  • the time t preferably ranges from 5 to 20 seconds.
  • the drum 3 runs through a plurality of periods t1, t2, ...tn, during which the rotation speed is increased to the speed V1 and then dropped back to the speed V.
  • the steps through which the drum speed is changed to the value V1 may be proximate in time, and form a pair, or distant.
  • the first step may be at a speed V1 and the following step at a speed V2, the speeds V1 and V2 being different although fulfilling the condition of being both higher than the speed V multiplied by the factor K greater than 2.
  • the speed V2 of the succeeding rotation step of the pair of steps may be lower than the speed V1 of the preceding rotation step.
  • the high speed pulses imparted to the drum during the detergent dissolution and liquid recirculation step cause the laundry to be wrung out, although for a limited time, thereby causing partial recovery of the recirculated liquid. Furthermore, such high speed pulses, having a higher speed than conventional satellite-like distribution of laundry in the drum, cause a mechanical action on the laundry load, that will more effectively separate the pieces that form it, thereby exposing a larger surface of the fabrics to the recirculated detergent.
  • the plurality of nozzles 11 allows highly uniform and effective wetting of the laundry so arranged. Such effect is maximized by the particular arrangement and configuration of the nozzles 11.
  • the activity of the detergent on the laundry in the tab is enhanced when its concentration is higher than that of the later steps of the washing cycle, thereby involving advantages in terms of overall performance of the machine, including power saving performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP12425164.6A 2012-10-09 2012-10-09 Wäschewaschmaschine mit verbesserter Waschmittelaktivierung Withdrawn EP2719814A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12425164.6A EP2719814A1 (de) 2012-10-09 2012-10-09 Wäschewaschmaschine mit verbesserter Waschmittelaktivierung
RU2013143056A RU2635974C2 (ru) 2012-10-09 2013-09-23 Машина для стирки белья с улучшенной активацией моющего средства
CN201310467536.XA CN103774381A (zh) 2012-10-09 2013-10-09 具有增强的清洁剂活化作用的洗衣机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12425164.6A EP2719814A1 (de) 2012-10-09 2012-10-09 Wäschewaschmaschine mit verbesserter Waschmittelaktivierung

Publications (1)

Publication Number Publication Date
EP2719814A1 true EP2719814A1 (de) 2014-04-16

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Family Applications (1)

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EP12425164.6A Withdrawn EP2719814A1 (de) 2012-10-09 2012-10-09 Wäschewaschmaschine mit verbesserter Waschmittelaktivierung

Country Status (3)

Country Link
EP (1) EP2719814A1 (de)
CN (1) CN103774381A (de)
RU (1) RU2635974C2 (de)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107287832A (zh) * 2016-03-30 2017-10-24 青岛海尔滚筒洗衣机有限公司 一种洗衣机的分配器盒、洗衣机以及投放方法
EP3309290A1 (de) * 2016-10-14 2018-04-18 Whirlpool Corporation Horizontale trommelwaschmaschine mit waschflüssigkeitsrückführungssystem
EP3483329A1 (de) * 2017-11-09 2019-05-15 LG Electronics Inc. Waschmaschine
US20190203405A1 (en) * 2017-12-28 2019-07-04 Lg Electronics Inc. Washing machine
CN110352274A (zh) * 2016-12-28 2019-10-18 Lg电子株式会社 洗衣机
CN110366617A (zh) * 2016-12-28 2019-10-22 Lg电子株式会社 洗衣机
WO2019235814A1 (en) * 2018-06-04 2019-12-12 Lg Electronics Inc. Washing machine with conduit for supplying water to nozzles at gasket and manufacturing method of the conduit
EP3587652A1 (de) * 2018-06-27 2020-01-01 LG Electronics Inc. -1- Waschmaschine
EP3587655A1 (de) * 2018-06-27 2020-01-01 Lg Electronics Inc. Waschmaschine
EP3587653A1 (de) * 2018-06-27 2020-01-01 LG Electronics Inc. -1- Waschmaschine
EP3594403A1 (de) * 2018-06-27 2020-01-15 LG Electronics Inc. -1- Waschmaschine
EP3690120A1 (de) * 2019-02-01 2020-08-05 LG Electronics Inc. Waschmaschine
JP2021528182A (ja) * 2018-06-27 2021-10-21 エルジー エレクトロニクス インコーポレイティドＬｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｉｎｃ． 洗濯機
JP2021528184A (ja) * 2018-06-27 2021-10-21 エルジー エレクトロニクス インコーポレイティドＬｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｉｎｃ． 洗濯機
JP2021528181A (ja) * 2018-06-27 2021-10-21 エルジー エレクトロニクス インコーポレイティドＬｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｉｎｃ． 洗濯機
JP2021528180A (ja) * 2018-06-27 2021-10-21 エルジー エレクトロニクス インコーポレイティドＬｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｉｎｃ． 洗濯機
JP2021529044A (ja) * 2018-06-27 2021-10-28 エルジー エレクトロニクス インコーポレイティドＬｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｉｎｃ． 洗濯機
JP2021530269A (ja) * 2018-06-27 2021-11-11 エルジー エレクトロニクス インコーポレイティドLg Electronics Inc. 洗濯機及び洗濯機の組立方法
CN114592324A (zh) * 2018-06-27 2022-06-07 Lg电子株式会社 洗衣机
US11459692B2 (en) 2019-01-31 2022-10-04 Ecolab Usa Inc. Laundry machine kit to enable control of water levels, recirculation, and spray of chemistry
US11519121B2 (en) 2018-06-27 2022-12-06 Lg Electronics Inc. Washing machine
US11525200B2 (en) 2019-01-31 2022-12-13 Ecolab Usa Inc. Controller for a rinse water reuse system and methods of use
US11572652B2 (en) 2019-01-31 2023-02-07 Ecolab Usa Inc. Controlling water levels and detergent concentration in a wash cycle
WO2024022338A1 (zh) * 2022-07-26 2024-02-01 青岛海尔洗衣机有限公司 滚筒洗衣机

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JP6591157B2 (ja) * 2014-12-09 2019-10-16 アクア株式会社 洗濯機
DE102016206047A1 (de) * 2016-04-12 2017-10-12 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
KR20180136099A (ko) * 2017-06-14 2018-12-24 주식회사 대우전자 벽걸이형 세탁기 및 벽걸이형 세탁기의 세제함
CN110607661A (zh) * 2018-06-15 2019-12-24 青岛海尔滚筒洗衣机有限公司 滚筒洗衣机和洗衣机的喷嘴
CN112522919B (zh) * 2019-09-17 2023-06-16 海信冰箱有限公司 洗衣机用自动投放系统及洗衣机

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CN107287832A (zh) * 2016-03-30 2017-10-24 青岛海尔滚筒洗衣机有限公司 一种洗衣机的分配器盒、洗衣机以及投放方法
CN107287832B (zh) * 2016-03-30 2021-09-21 青岛海尔洗涤电器有限公司 一种洗衣机的分配器盒、洗衣机以及投放方法
EP3309290A1 (de) * 2016-10-14 2018-04-18 Whirlpool Corporation Horizontale trommelwaschmaschine mit waschflüssigkeitsrückführungssystem
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EP4234798A3 (de) * 2016-12-28 2023-10-18 LG Electronics Inc. Waschmaschine
EP3564427A4 (de) * 2016-12-28 2020-06-03 LG Electronics Inc. -1- Waschmaschine
US11885062B2 (en) 2016-12-28 2024-01-30 Lg Electronics Inc. Washing machine
CN110352274A (zh) * 2016-12-28 2019-10-18 Lg电子株式会社 洗衣机
CN110366617A (zh) * 2016-12-28 2019-10-22 Lg电子株式会社 洗衣机
EP4234796A3 (de) * 2017-11-09 2023-10-11 LG Electronics Inc. Waschmaschine
EP4234797A3 (de) * 2017-11-09 2023-10-18 LG Electronics Inc. Waschmaschine
US11920283B2 (en) 2017-11-09 2024-03-05 Lg Electronics Inc. Washing machine having circulation nozzles
AU2020207851B2 (en) * 2017-11-09 2022-06-09 Lg Electronics Inc. Washing machine
US11208756B2 (en) 2017-11-09 2021-12-28 Lg Electronics Inc. Laundry treating apparatus having a nozzle
EP3483329A1 (de) * 2017-11-09 2019-05-15 LG Electronics Inc. Waschmaschine
US11591741B2 (en) 2017-11-09 2023-02-28 Lg Electronics Inc. Washing machine having circulation nozzles
AU2020207853B2 (en) * 2017-11-09 2022-06-09 Lg Electronics Inc. Laundry treating apparatus
US11866879B2 (en) 2017-11-09 2024-01-09 Lg Electronics Inc. Laundry treating apparatus having a nozzle
EP3483330A1 (de) * 2017-11-09 2019-05-15 LG Electronics Inc. Wäschebehandlungsvorrichtung
US11028519B2 (en) 2017-11-09 2021-06-08 Lg Electronics Inc. Washing machine having circulation nozzles
AU2019200008B2 (en) * 2017-12-28 2020-05-28 Lg Electronics Inc. Washing machine
US20190203405A1 (en) * 2017-12-28 2019-07-04 Lg Electronics Inc. Washing machine
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