EP2746449A1 - Verbesserte Waschmaschine - Google Patents

Verbesserte Waschmaschine Download PDF

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Publication number
EP2746449A1
EP2746449A1 EP12198908.1A EP12198908A EP2746449A1 EP 2746449 A1 EP2746449 A1 EP 2746449A1 EP 12198908 A EP12198908 A EP 12198908A EP 2746449 A1 EP2746449 A1 EP 2746449A1
Authority
EP
European Patent Office
Prior art keywords
washing
washing tub
washing machine
valve seat
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.)
Withdrawn
Application number
EP12198908.1A
Other languages
English (en)
French (fr)
Inventor
Martino Bondi
Matteo Del Puppo
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP12198908.1A priority Critical patent/EP2746449A1/de
Priority to PCT/EP2013/076840 priority patent/WO2014095816A1/en
Priority to EP13811440.0A priority patent/EP2935682B1/de
Priority to PL13811440T priority patent/PL2935682T3/pl
Priority to AU2013363725A priority patent/AU2013363725A1/en
Publication of EP2746449A1 publication Critical patent/EP2746449A1/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Withdrawn legal-status Critical Current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 
    • D06F39/08—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 generally relates to the field of household appliances. More specifically, the present invention relates to laundry washing machines and laundry washing/drying machines, both for domestic and professional use.
  • Laundry washing and washing/drying machines are household appliances designed to wash laundry and typically comprise a washing tub housing a rotatable perforated drum in which the laundry to be washed can be loaded/unloaded.
  • washing liquid e.g. , water, water mixed with washing products and/or water mixed with rinsing products
  • inlet line - in the washing tub of the washing machine Being the drum perforated, the washing liquid penetrates thereinto, soaking the laundry.
  • a washing phase is started in which the drum is rotated, so that the laundry loaded into the drum is washed thanks to the chemical reactions exerted by the washing liquid, supported by the tumbling action caused by the rotation of the drum.
  • the washing liquid (which is at this point mixed with dirt particles coming from the laundry) is removed from the washing tub for allowing the carrying out of rinsing and/or spin-drying operations on the laundry.
  • the washing machine is provided with a discharge system adapted to selectively drain the washing liquid from the washing tub.
  • the discharge system comprises a discharge duct for receiving the washing liquid to be discharged.
  • the discharge duct is fluidly coupled with the washing tub through a discharge hole provided at the bottom of the washing tub.
  • a drain pump usually positioned downstream the discharge duct, is operable to cause the washing liquid located into the discharge duct to be discharged through a drain hose adapted to be connected to the water drain network system.
  • a valve is provided for selectively opening/closing the discharge hole in order to selectively allow/block washing liquid to flow between the washing tub and the discharge duct.
  • valves of the floating type - hereinafter, "floating valves" - comprising a floating closure member arranged in the discharge duct and adapted to open/close the discharge hole based on the amount of liquid located in the discharge duct.
  • the floating closure member is buoyant in the washing liquid. As the level of liquid in the discharge duct increases, the floating closure member is pushed toward the washing tub.
  • the floating valve further comprises a valve seat, for example a gasket member, provided with an opening for allowing liquid to pass from the washing tub to the discharge duct when the floating closure member is spaced apart from the valve seat.
  • the opening of the valve seat is closed by the floating closure member, preventing further exchanges of fluids between the washing tub and the discharge duct.
  • the floating valve Before performing the washing liquid loading phase, the floating valve should be closed, in such a way to avoid that the clean washing liquid that is supplied in the subsequent phase is wasted in the discharge duct without being participated in the washing process, to avoid that dirt residual accumulated in the discharge duct mixes with the supplied washing liquid, as well as to thermally insulate the washing tub from the discharge duct.
  • a valve closing phase may be carried out before starting the actual washing liquid loading phase.
  • this valve closing phase firstly, a prefixed amount of water is introduced in the washing tub through the inlet line; since when the discharge duct is empty the floating valve is still open, this prefixed amount of water flows through the valve into the discharge duct, forming a corresponding water column in the drain hose.
  • the drain pump is then turned on impulsively (for example, it is activated for one second) for decreasing the level of water in the discharge duct and correspondingly increasing the level of the water column contained in the drain hose.
  • an air passage e.g. , a hole, which connects the discharge duct with the washing tub for allowing air trapped in the discharge duct to be discharged in the washing tub during the valve closure, increasing the leak-proofing of the floating valve, without having to employ materials specifically designed to be gas permeable and water impermeable.
  • the latter is advantageously designed to have a small cross section.
  • Applicant has handled the problem of devising a not-expensive solution which allows reducing the drawbacks caused by the abovementioned concentration of air in the discharge duct, avoiding at the same time that the laundry contained in the drum is soiled.
  • the solution according to one or more embodiments of the invention is based on the idea of providing an intercepting member arranged to prevent a liquid flow exiting the air passage connecting the discharge duct with the washing tub from hitting the washing drum of a washing machine.
  • the washing machine comprises a washing tub in which washing liquid may be loaded, a perforated drum rotatably accommodated in the washing tub for containing laundry to be washed, and a discharge system fluidly connected to the washing tub and adapted to selectively discharge washing liquid from the washing tub.
  • the washing machine further comprises a valve, placed between the washing tub and the discharge system.
  • the valve comprises a valve seat through which liquid can pass from the washing tub to the discharge system.
  • the valve further comprises a closure member movable with respect to the valve seat from a closing position, in which said closure member abuts against the valve seat, impeding the flow of washing liquid from the washing tub to the discharge system, to an open position in which said closure member is at least partially spaced apart from the valve seat, allowing the flow of washing liquid from the washing tub to the discharge system.
  • the washing machine further comprises an air passage fluidly connecting said discharge system and said washing tub for allowing the passage of at least air from the discharge system to the washing tub.
  • the washing machine further comprises an intercepting member arranged to prevent a liquid flow exiting said air passage from hitting said drum.
  • said intercepting member is arranged in such a way to intercept a liquid flow exiting said air passage and directed toward the drum.
  • the intercepting member is arranged to deflect away from the drum a liquid flow exiting said air passage.
  • the intercepting member comprises a deflecting surface displaced transversally, preferably perpendicularly, to the longitudinal axis of said air passage.
  • said air passage comprises an air pipe extending substantially parallel to the longitudinal axis of the discharge hole.
  • said air pipe comprises a first air pipe having a top end with a first opening located in the washing tub interior and having a bottom end with a second opening facing the discharge system.
  • the intercepting member is placed in proximity of the top end of the first air pipe.
  • said first air pipe is integral with the washing tube.
  • the valve seat includes a hole facing said second opening.
  • said air passage comprises a second air pipe integral with the valve seat and coaxially fitted inside the first air pipe.
  • said first air pipe is integral with the valve seat.
  • said air passage comprises a hole located on said valve seat.
  • the intercepting member is integral with the washing tub.
  • Figure 1 is a front view of a washing machine 100 in which embodiments of the present invention may be implemented.
  • the washing machine 100 is a machine for treating (washing, or washing/drying) laundry of the front-loading type.
  • the washing machine 100 advantageously comprises a preferably substantially parallelepiped-shaped casing 105 that encloses a washing tub 107 wherein laundry is treated, along with any other components of the washing machine 100 necessary for the operation (e.g. , hydraulic, electronic and electromechanical apparatuses known in the art and, therefore, not herein described for sake of conciseness).
  • the washing tub 107 houses a rotatable perforated drum 110, preferably substantially cylindrical-shaped, in which laundry 112 to be washed can be loaded.
  • a loading/unloading opening closable by a door is advantageously provided, preferably on a front side of the washing machine 100.
  • a water supply system 120 and a detergent supply system 122 are arranged preferably in the upper part of the washing machine 100 for supplying washing liquid into the washing tub 107.
  • the detergent supply system 122 advantageously comprises a removable drawer 123 provided with compartments suited to be filled with washing and/or rinsing products.
  • Water flowing through the water supply system 120 is advantageously supplied into the washing tub 107 by making it flow through the drawer 123 and through an inlet line 125 in fluidly communication with the washing tub 107.
  • the water supply system 120 further comprises a main pipe 130 fluidly connecting the drawer 123 to an external water supply line 135, preferably by means of a controlled input supply valve 140.
  • Washing liquid which reaches the washing tub 107 may selectively contain one of the products contained in the compartments of the drawer 123, or may be clean water ( i.e., which does not contain any product), depending on the washing program which is actually performed.
  • the washing liquid conveyed into the washing tub 107 is made to contain one of the products contained in the compartments of the drawer 123, while in other phases, for example during the rinsing phase, the washing liquid is only water.
  • Alternative arrangements may be provided, for example with a separate water inlet line adapted to supply exclusively clean water into the washing tub 107.
  • FIG 2 is a partially exploded view of an exemplary washing tub 107.
  • the washing tub 107 has preferably a substantially cylindrical shape and is made of waterproof material which is also able to withstand operating temperatures and chemicals reactions promoted by washing liquids during the washing machine operation, such as a plastic polymer.
  • the washing tub 107 comprises a front semi-shell section 205a and a rear semi-shell section 205b, each having preferably substantially the shape of a hollow half-cylinder.
  • the front semi-shell section 205a and the rear semi-shell section 205b are coupled to each other ( e.g. , by means of pins or bolts, or welding) to enclose therebetween the drum 110.
  • the washing machine 100 is provided with a discharge system 300 adapted to selectively dispose washing liquid from the washing tub 107, e.g. , after a washing phase is finished.
  • Figure 3 is a partially exploded view of a portion of an exemplary discharge system 300.
  • the discharge system 300 comprises a discharge duct 310 arranged to be coupled with the washing tub 107 for receiving the washing liquid to be discharged.
  • the discharge duct 310 is a manifold made of a rigid material, such as plastic.
  • the discharge duct 310 may be a flexible hose, for example made in a flexible material, such as rubber.
  • the discharge duct 310 is arranged to be selectively in fluid communication with the washing tub 107, preferably through a discharge hole 210 provided at the bottom of the washing tub 107.
  • the discharge hole 210 is provided at a bottom portion of the front semi-shell section 205a.
  • the washing tub 107 advantageously includes a drain collar - identified in Figure 2 with the reference 215 - surrounding the discharge hole 210 and protruding downward from the front semi-shell section 205a, and the discharge duct 310 comprises a discharge duct input opening 315 surrounded by a sleeve 317 adapted to be fitted around the drain collar 215.
  • the discharge system 300 advantageously further comprises a drain pump 320, e.g. , positioned downstream the discharge duct 310, which is operable to cause liquid located into the discharge duct 310 to be discharged through a drain hose 322 (see Figure 1 ) adapted to be connected to a water drain network system (not illustrated).
  • a drain pump 320 e.g. , positioned downstream the discharge duct 310, which is operable to cause liquid located into the discharge duct 310 to be discharged through a drain hose 322 (see Figure 1 ) adapted to be connected to a water drain network system (not illustrated).
  • the discharge system 300 further comprises a valve 330 advantageously located at the discharge duct input opening 315 for selectively opening/closing the discharge duct input opening 315, and thus the discharge hole 210 as well, in order to selectively allow/block liquid to flow between the washing tub and 107 the discharge duct 310.
  • the valve 330 is preferably a floating-type valve, comprising a floating closure member 340 arranged in the discharge duct 310 in such a way to allow/prevent the passage of liquid from the tub 107 to the discharge duct 310, preferably based on the amount of liquid located in the discharge duct 310.
  • the floating closure member 340 is advantageously made of a material and/or has a shape (for example including hollow cavities) that makes the floating closure member 340 to float in the washing liquid. As the level of liquid in the discharge duct 310 increases, the floating closure member 340 goes up the discharge duct 310, being pushed toward the washing tub 107 interior by the pressure exerted by the column of liquid located in the drain hose 322.
  • the valve 330 further comprises a valve seat 350 adapted to be arranged at the discharge hole 210 of the washing tub 107.
  • the valve seat 350 is preferably in the form of a, e.g. , flexible, gasket, for example fitted on the sleeve 317 wherein the discharge duct input opening 315 of the discharge duct 310 is located. Similar considerations apply if the valve seat 350 is fitted on the drain collar 215 surrounding the discharge hole 210.
  • the valve seat 350 is advantageously provided with a seat opening 360 - which opportunely faces the discharge hole 210 and the discharge duct input opening 315 - for allowing liquid to pass from the washing tub 107 to the discharge duct 310 when the floating closure member 340 is spaced apart from the valve seat 350.
  • the valve seat opening 360 is closed by the floating closure member 340, preventing further exchanges of fluids between the washing tub 107 and the discharge duct 310.
  • the floating closure member 340 is advantageously shaped in such a way that its upper portion matches the valve seat opening 360 when abutting against the valve seat 350.
  • an air passage coupling the discharge duct 310 with the washing tub 107 is advantageously provided.
  • the presence of such air passage allows air trapped in the discharge duct 310 to be discharged in the washing tub 107 during the closure of the valve.
  • an intercepting member is provided, arranged in such a way to avoid a liquid flow exiting the air passage (e.g. coming from the discharge system 300 through the air passage and directed toward the drum 110) hits the drum 110 (and, via the holes provided in the latter, the laundry 112 contained therein). According to an embodiment of the present invention, this is obtained by arranging the intercepting member in such a way to intercept said liquid flow.
  • Figure 4 is a simplified cross-sectional view of the drum-washing tub-discharge system assembly according to an embodiment of the present invention.
  • the air passage connecting the discharge duct 310 with the washing tub 107 comprises an air pipe 410, extending along a direction B substantially parallel to the axis of the discharge hole 210.
  • the air pipe 410 has a top end 412 with an opening 415 located in the washing tub 107 interior, and a bottom end 417 with an opening 420 facing the discharge duct 310 interior.
  • the opening 420 faces a hole 425 provided on the valve seat 350, for example at a border portion thereof.
  • air located within the discharge duct 310 may advantageously pass through the hole 425, go up the air pipe 410, and then reach the washing tub 107 interior through the opening 415.
  • an intercepting member 430 is provided in correspondence to the top end 412 of the air pipe 410, so as to intercept liquid flows coming from the discharge duct 310 through the air passage and directed toward the drum 110.
  • the intercepting member 430 comprises a roof or a shield or a deflector element having a deflector surface 430a which extends transversally, preferably substantially perpendicularly, to the direction B.
  • the presence of such roof or shield or deflector element avoids that washing products enter the air pipe 410 (because of gravity) and discharge into the discharge duct 310.
  • the intercepting member 430 has different orientations, provided that said orientations allow the intercepting member 430 to intercept liquid flows coming from the discharge duct 310 and directed toward the drum 110.
  • the intercepting member 430 is arranged in such a way that if washing liquid, water, and/or foam located in the discharge duct 310 passes through the air passage (in this embodiment of the invention, goes up the air pipe 410), instead of reaching the drum 110 (and dirtying the laundry contained therein), this washing liquid, water, and/or foam is advantageously deflected away from the drum, e.g. , toward the bottom of the washing tub 107.
  • the intercepting member 430 may advantageously comprise one or more protruding elements shaped and positioned in such a way to "break" the liquid flow coming from the air passage into a plurality of smaller flows which are not capable of reaching the drum 110.
  • the openings 415, 420 and the hole 425 have sufficiently small sizes.
  • both the air pipe 410 and the intercepting member 430 are integral to (i.e. made in a single-piece construction with) the washing tub 107.
  • similar considerations apply if the air pipe 410 and/or the intercepting member 430 are separated pieces attached to the washing tub 107, for example through snap-fit engagements, pins, welding, or glue.
  • the valve seat 350 directly comprises a respective air pipe, which extends parallel to the air pipe 410 ( e.g. , substantially parallel to the direction B).
  • the valve seat 350 is provided with an air pipe 510 ( e.g. , integral to the valve seat 350) adapted to be coaxially fitted inside the air pipe 410.
  • the resulting air passage connecting the discharge duct 310 with the washing tub 107 is more reliable, being less prone to blockings due to possible misalignments between the valve seat 350 and the washing tub 107.
  • An isometric view of the air pipe 510 located on the valve seat 350 according to an embodiment of the present invention is also visible in Figure 3 .
  • the washing tub 107 does not include the air pipe 410, and the air passage connecting the discharge duct 310 with the washing tub 107 comprises instead the air pipe 510, arranged in such a way to directly face the internal of the tub or to face or to pass through a hole provided on the washing tub 107.
  • the intercepting member adapted to intercept liquid flows coming from the discharge duct 310 and directed toward the drum 110 may be directly arranged on the valve seat 350 ( e.g. , integral to the air pipe 510) or arranged on the washing tub 107, ( e.g. , protruding from a wall thereof).
  • the air passage connecting the discharge duct 310 with the washing tub 107 does not include any dedicated air pipe, and comprises instead a simple hole provided on the valve seat 350, which puts in communication the internal of the tub and the discharge duct 310.
  • the air passage connecting the discharge duct 310 with the washing tub 107 comprises a hole provided on the valve seat 350, facing a further hole provided in the washing tub 107.
  • the intercepting member may be directly arranged on the valve seat 350 ( e.g. , protruding therefrom) or arranged on the washing tub 107 ( e.g. , protruding from a wall thereof).
  • the concepts of the present invention apply as well in case the air passage connecting the discharge duct with the washing tub is provided on a portion of the discharge duct itself, for example provided with a respective hole or a respective air pipe overlapped with a corresponding hole (or coaxially fitted in a corresponding air pipe) provided in the washing tub.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP12198908.1A 2012-12-21 2012-12-21 Verbesserte Waschmaschine Withdrawn EP2746449A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP12198908.1A EP2746449A1 (de) 2012-12-21 2012-12-21 Verbesserte Waschmaschine
PCT/EP2013/076840 WO2014095816A1 (en) 2012-12-21 2013-12-17 Improved washing machine
EP13811440.0A EP2935682B1 (de) 2012-12-21 2013-12-17 Verbesserte waschmaschine
PL13811440T PL2935682T3 (pl) 2012-12-21 2013-12-17 Udoskonalona pralka
AU2013363725A AU2013363725A1 (en) 2012-12-21 2013-12-17 Improved washing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12198908.1A EP2746449A1 (de) 2012-12-21 2012-12-21 Verbesserte Waschmaschine

Publications (1)

Publication Number Publication Date
EP2746449A1 true EP2746449A1 (de) 2014-06-25

Family

ID=47520788

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12198908.1A Withdrawn EP2746449A1 (de) 2012-12-21 2012-12-21 Verbesserte Waschmaschine
EP13811440.0A Active EP2935682B1 (de) 2012-12-21 2013-12-17 Verbesserte waschmaschine

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP13811440.0A Active EP2935682B1 (de) 2012-12-21 2013-12-17 Verbesserte waschmaschine

Country Status (4)

Country Link
EP (2) EP2746449A1 (de)
AU (1) AU2013363725A1 (de)
PL (1) PL2935682T3 (de)
WO (1) WO2014095816A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10179963B2 (en) 2015-07-27 2019-01-15 Whirlpool Corporation Fabric treating appliance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110904634A (zh) * 2018-09-17 2020-03-24 青岛海尔洗衣机有限公司 一种洗衣机排水控制机构及洗衣机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712093A1 (de) * 1977-03-19 1978-09-21 Bauknecht Gmbh G Waschmaschine oder waschtrockner
DE3540741A1 (de) * 1985-10-03 1987-04-09 Miele & Cie Waschmaschine oder waschtrockner mit einrichtungen zur vermeidung von waschmittelverlusten
WO2009083365A1 (en) 2007-12-28 2009-07-09 Arcelik Anonim Sirketi A washing machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712093A1 (de) * 1977-03-19 1978-09-21 Bauknecht Gmbh G Waschmaschine oder waschtrockner
DE3540741A1 (de) * 1985-10-03 1987-04-09 Miele & Cie Waschmaschine oder waschtrockner mit einrichtungen zur vermeidung von waschmittelverlusten
WO2009083365A1 (en) 2007-12-28 2009-07-09 Arcelik Anonim Sirketi A washing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10179963B2 (en) 2015-07-27 2019-01-15 Whirlpool Corporation Fabric treating appliance
US11035063B2 (en) 2015-07-27 2021-06-15 Whirlpool Corporation Fabric treating appliance
US11781258B2 (en) 2015-07-27 2023-10-10 Whirlpool Corporation Method of operating a fabric treating appliance

Also Published As

Publication number Publication date
EP2935682A1 (de) 2015-10-28
AU2013363725A1 (en) 2015-07-02
WO2014095816A1 (en) 2014-06-26
EP2935682B1 (de) 2021-03-10
PL2935682T3 (pl) 2021-09-13

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