EP2123821A1 - Electric household washing appliance - Google Patents

Electric household washing appliance Download PDF

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Publication number
EP2123821A1
EP2123821A1 EP08156765A EP08156765A EP2123821A1 EP 2123821 A1 EP2123821 A1 EP 2123821A1 EP 08156765 A EP08156765 A EP 08156765A EP 08156765 A EP08156765 A EP 08156765A EP 2123821 A1 EP2123821 A1 EP 2123821A1
Authority
EP
European Patent Office
Prior art keywords
pipe
filtering device
electric household
wash fluid
household appliance
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.)
Granted
Application number
EP08156765A
Other languages
German (de)
French (fr)
Other versions
EP2123821B1 (en
Inventor
Ivan Monticco
Andrea Mazzon
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 PL08156765T priority Critical patent/PL2123821T3/en
Priority to ES08156765T priority patent/ES2364599T3/en
Priority to EP08156765A priority patent/EP2123821B1/en
Priority to AT08156765T priority patent/ATE504686T1/en
Priority to DE602008006043T priority patent/DE602008006043D1/en
Priority to PCT/EP2009/003342 priority patent/WO2009141070A1/en
Publication of EP2123821A1 publication Critical patent/EP2123821A1/en
Application granted granted Critical
Publication of EP2123821B1 publication Critical patent/EP2123821B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • 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 
    • D06F39/10—Filtering arrangements

Definitions

  • the present invention relates to an electric household washing appliance, in particular a dishwasher or washing machine.
  • an appliance comprising a wash tub for washing articles; a hydraulic pipe for feeding a wash fluid from the wash tub to a drain; a filtering device fitted along the hydraulic pipe to remove any foreign bodies from the wash fluid; and a feed pump fitted along the hydraulic pipe, between the filtering device and the drain.
  • an electric household washing appliance as claimed in the accompanying Claims.
  • Number 1 in Figures 1 and 2 indicates as a whole an electric household appliance for washing articles (not shown), and which, in the example shown, is defined by a washing machine comprising a substantially parallelepiped-shaped casing 2; and a substantially cylindrical wash tub 3, which has a longitudinal axis 4, is mounted inside casing 2, and houses a substantially cylindrical drum 5 connected to tub 3 and rotated, with respect to tub 3, about axis 4 by a known actuating device not shown.
  • Washing machine 1 also comprises a drain circuit 6 for feeding a wash fluid, normally water and detergent, from tub 3 to a drain 7 connected to the water mains.
  • a wash fluid normally water and detergent
  • Circuit 6 comprises a first hydraulic pipe 8 extending between tub 3 and drain 7; a reversible feed pump 9 located along pipe 8 and having an impeller 10 mounted to rotate in two opposite directions; and a first filtering device 11 fitted along pipe 8, between tub 3 and pump 9, to remove any foreign bodies 12 from the wash fluid drained along circuit 6.
  • Pipe 8 is also fitted with a valve device 13 comprising an on/off member 14, which is fitted inside pipe 8, between tub 3 and filtering device 11, and is mounted to rotate about a hinge axis 15, with respect to pipe 8 and as explained in detail below, between an open position ( Figure 3 ) and a closed position ( Figure 4 ) opening and closing pipe 8 respectively.
  • a valve device 13 comprising an on/off member 14, which is fitted inside pipe 8, between tub 3 and filtering device 11, and is mounted to rotate about a hinge axis 15, with respect to pipe 8 and as explained in detail below, between an open position ( Figure 3 ) and a closed position ( Figure 4 ) opening and closing pipe 8 respectively.
  • Circuit 6 also comprises a second hydraulic pipe 16, which is mounted parallel to a portion 17 of pipe 8 housing device 11, is located below portion 17, and houses a second filtering device 18.
  • filtering device 11 is designed to remove smaller foreign bodies 12 than filtering device 18.
  • filtering devices 11, 18 are replaced with a single filtering device of the same filtration capacity along both pipe 16 and portion 17.
  • Pipe 16 and portion 17 are housed inside a drawer 19 fitted to casing 2 to slide to and from an extracted position, in which drawer 19 projects outwards of casing 2 to permit cleaning of filtering devices 11, 18, particularly filtering device 18.
  • pump 9 is operated (clockwise in Figure 3 ) to feed the wash fluid along pipes 8 and 16 to drain 7 and out of washing machine 1 in a given direction 20; on/off member 14 is rotated (anticlockwise in Figure 3 ) by the wash fluid from the closed to the open position; large foreign bodies 12, such as coins and/or buttons, fall by gravity into pipe 16 and are retained by filtering device 18; and small foreign bodies 12, such as threads and/or fluff, are retained by filtering devices 11, 18.
  • impeller 10 When normal drain-off is completed ( Figure 4 ), impeller 10 is rotated in the opposite direction to before (anticlockwise in Figure 4 ) to feed the wash fluid through filtering device 11 in the opposite direction 21 to direction 20; on/off member 14 is rotated (clockwise in Figure 4 ) by the wash fluid from the open to the closed position; and the wash fluid is fed successively along portion 17 and pipe 16, i.e. successively through filtering devices 11 and 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Detergent Compositions (AREA)
  • Cleaning In General (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Abstract

An electric household appliance has a first pipe (8) for feeding wash fluid from a wash tub (3), for washing articles, to a drain (7); a filtering device (11) fitted along the first pipe (8); a second pipe (16) parallel to the first pipe (8) and having a retaining device (18) for retaining foreign bodies (12) contained in the wash fluid; and a reversible pump (9) fitted along the first pipe (8), between the filtering device (11) and the drain (7), to feed the wash fluid selectively from the wash tub (3) to the drain (7), or successively through the filtering device (11) and the retaining device (18).

Description

  • The present invention relates to an electric household washing appliance, in particular a dishwasher or washing machine.
  • In the electric household appliance industry, an appliance is known comprising a wash tub for washing articles; a hydraulic pipe for feeding a wash fluid from the wash tub to a drain; a filtering device fitted along the hydraulic pipe to remove any foreign bodies from the wash fluid; and a feed pump fitted along the hydraulic pipe, between the filtering device and the drain.
  • Known electric household washing appliances of the type described above have various drawbacks, mainly due to the filtering devices normally used clogging rapidly and so requiring frequent cleaning and/or replacement.
  • It is an object of the present invention to provide an electric household washing appliance designed to eliminate the aforementioned drawbacks, and which is cheap and easy to produce.
  • According to the present invention, there is provided an electric household washing appliance as claimed in the accompanying Claims.
  • A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
    • Figures 1 and 2 show schematics of a preferred embodiment of the electric household appliance according to the present invention;
    • Figures 3 and 4 show, schematically, operation of the Figure 1 and 2 appliance.
  • Number 1 in Figures 1 and 2 indicates as a whole an electric household appliance for washing articles (not shown), and which, in the example shown, is defined by a washing machine comprising a substantially parallelepiped-shaped casing 2; and a substantially cylindrical wash tub 3, which has a longitudinal axis 4, is mounted inside casing 2, and houses a substantially cylindrical drum 5 connected to tub 3 and rotated, with respect to tub 3, about axis 4 by a known actuating device not shown.
  • Washing machine 1 also comprises a drain circuit 6 for feeding a wash fluid, normally water and detergent, from tub 3 to a drain 7 connected to the water mains.
  • Circuit 6 comprises a first hydraulic pipe 8 extending between tub 3 and drain 7; a reversible feed pump 9 located along pipe 8 and having an impeller 10 mounted to rotate in two opposite directions; and a first filtering device 11 fitted along pipe 8, between tub 3 and pump 9, to remove any foreign bodies 12 from the wash fluid drained along circuit 6.
  • Pipe 8 is also fitted with a valve device 13 comprising an on/off member 14, which is fitted inside pipe 8, between tub 3 and filtering device 11, and is mounted to rotate about a hinge axis 15, with respect to pipe 8 and as explained in detail below, between an open position (Figure 3) and a closed position (Figure 4) opening and closing pipe 8 respectively.
  • Circuit 6 also comprises a second hydraulic pipe 16, which is mounted parallel to a portion 17 of pipe 8 housing device 11, is located below portion 17, and houses a second filtering device 18. In the example shown, filtering device 11 is designed to remove smaller foreign bodies 12 than filtering device 18.
  • In a variation not shown, filtering devices 11, 18 are replaced with a single filtering device of the same filtration capacity along both pipe 16 and portion 17.
  • Pipe 16 and portion 17 are housed inside a drawer 19 fitted to casing 2 to slide to and from an extracted position, in which drawer 19 projects outwards of casing 2 to permit cleaning of filtering devices 11, 18, particularly filtering device 18.
  • In actual use, when draining wash fluid normally from tub 3 (Figure 3), pump 9 is operated (clockwise in Figure 3) to feed the wash fluid along pipes 8 and 16 to drain 7 and out of washing machine 1 in a given direction 20; on/off member 14 is rotated (anticlockwise in Figure 3) by the wash fluid from the closed to the open position; large foreign bodies 12, such as coins and/or buttons, fall by gravity into pipe 16 and are retained by filtering device 18; and small foreign bodies 12, such as threads and/or fluff, are retained by filtering devices 11, 18.
  • When normal drain-off is completed (Figure 4), impeller 10 is rotated in the opposite direction to before (anticlockwise in Figure 4) to feed the wash fluid through filtering device 11 in the opposite direction 21 to direction 20; on/off member 14 is rotated (clockwise in Figure 4) by the wash fluid from the open to the closed position; and the wash fluid is fed successively along portion 17 and pipe 16, i.e. successively through filtering devices 11 and 18.
  • By recycling the wash fluid along portion 17 in direction 21 :
    • foreign bodies 12 are flushed from filtering device 11 into pipe 16 and retained by filtering device 18;
    • pump 9 supplies wash fluid containing substantially no foreign bodies 12;
    • pump 9 and filtering device 11 are prevented from clogging; and
    • numerous wash cycles and tub 3 drain cycles can be performed before having to extract drawer 19 from casing 2 to clean, in particular, filtering device 18.

Claims (11)

  1. An electric household washing appliance, in particular a dishwasher or washing machine, the appliance comprising a wash tub (3) for washing articles; a first pipe (8) for feeding a wash fluid from the wash tub (3) to a drain (7) by which to drain the wash fluid from the appliance; a first filtering device (11) fitted along the first pipe (8); and a pump (9) fitted along the first pipe (8), between the first filtering device (11) and the drain (7); and being characterized by also comprising a second pipe (16) parallel to the first pipe (8) and fitted with a retaining device (18) for retaining foreign bodies (12) contained in the wash fluid; the pump (9) operating reversibly to feed wash fluid selectively from the wash tub (3) to the drain (7) or successively through the first filtering device (11) and the retaining device (18).
  2. An electric household appliance as claimed in Claim 1, and also comprising a valve device (13) fitted along the first pipe (8), between the wash tub (3) and the first filtering device (11), and movable between an open position and a closed position opening and closing the first pipe (8) respectively.
  3. An electric household appliance as claimed in Claim 2, wherein the valve device (13) comprises a non-return valve movable from the closed position to the open position by the wash fluid flowing from the wash tub (3) to the drain (7), and from the open position to the closed position by the wash fluid flowing successively through the first filtering device (11) and the retaining device (18).
  4. An electric household appliance as claimed in Claim 2 or 3, wherein the valve device (13) comprises an on/off member (14) fitted inside the first pipe (8) and movable between said open position and said closed position by the wash fluid.
  5. An electric household appliance as claimed in any one of the foregoing Claims, wherein the retaining device (18) comprises a second filtering device (18) housed in the second pipe (16).
  6. An electric household appliance as claimed in Claim 5, wherein the first filtering device (11) is designed to retain smaller foreign bodies (12) than the second filtering device (18).
  7. An electric household appliance as claimed in any one of the foregoing Claims, and also comprising a casing (2) housing the wash tub (3), the first pipe (8), and the second pipe (16); and a drawer (19) which pulls out of the casing (2) and houses at least the retaining device (18).
  8. An electric household appliance as claimed in Claim 7, wherein the drawer (19) houses the first filtering device (11) and the retaining device (18).
  9. An electric household appliance as claimed in any one of the foregoing Claims, wherein the pump (9) comprises an impeller (10) rotating in a first rotation direction to feed wash fluid through the first filtering device (11) in a given first direction (20), and in a second rotation direction, opposite the first rotation direction, to feed wash fluid through the first filtering device (11) in a second direction (21) opposite the first direction (20).
  10. An electric household appliance as claimed in any one of the foregoing Claims, wherein the pump (9) comprises an impeller (10) rotating in a first rotation direction to feed wash fluid in parallel along said first and said second pipe (8, 16), and in a second rotation direction, opposite the first rotation direction, to feed wash fluid successively through the first filtering device (11) and the retaining device (18).
  11. An electric household appliance as claimed in any one of the foregoing Claims, wherein the second pipe (16) is mounted parallel to a portion (17) of the first pipe (8) housing the first filtering device (11).
EP08156765A 2008-05-22 2008-05-22 Electric household washing appliance Not-in-force EP2123821B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PL08156765T PL2123821T3 (en) 2008-05-22 2008-05-22 Electric household washing appliance
ES08156765T ES2364599T3 (en) 2008-05-22 2008-05-22 LAVAR APPLIANCES APPARATUS.
EP08156765A EP2123821B1 (en) 2008-05-22 2008-05-22 Electric household washing appliance
AT08156765T ATE504686T1 (en) 2008-05-22 2008-05-22 ELECTRIC HOUSEHOLD WASHING MACHINE
DE602008006043T DE602008006043D1 (en) 2008-05-22 2008-05-22 Electric household washing machine
PCT/EP2009/003342 WO2009141070A1 (en) 2008-05-22 2009-05-12 Electric household washing appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08156765A EP2123821B1 (en) 2008-05-22 2008-05-22 Electric household washing appliance

Publications (2)

Publication Number Publication Date
EP2123821A1 true EP2123821A1 (en) 2009-11-25
EP2123821B1 EP2123821B1 (en) 2011-04-06

Family

ID=39876841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156765A Not-in-force EP2123821B1 (en) 2008-05-22 2008-05-22 Electric household washing appliance

Country Status (6)

Country Link
EP (1) EP2123821B1 (en)
AT (1) ATE504686T1 (en)
DE (1) DE602008006043D1 (en)
ES (1) ES2364599T3 (en)
PL (1) PL2123821T3 (en)
WO (1) WO2009141070A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4011475A1 (en) * 2020-12-11 2022-06-15 BSH Hausgeräte GmbH Water-conducting domestic appliance, filter system for a water-conducting domestic appliance and method for discharging fluid from a treatment chamber
EP4386128A1 (en) * 2022-12-16 2024-06-19 E.G.O. Elektro-Gerätebau GmbH Water-bearing household appliance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493745A (en) * 1994-12-29 1996-02-27 Whirlpool Corporation Recirculation pump system for a washing machine
EP1688530A1 (en) 2005-02-08 2006-08-09 Electrolux Home Products Corporation N.V. Clothes washing machine with improved filter assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493745A (en) * 1994-12-29 1996-02-27 Whirlpool Corporation Recirculation pump system for a washing machine
EP1688530A1 (en) 2005-02-08 2006-08-09 Electrolux Home Products Corporation N.V. Clothes washing machine with improved filter assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4011475A1 (en) * 2020-12-11 2022-06-15 BSH Hausgeräte GmbH Water-conducting domestic appliance, filter system for a water-conducting domestic appliance and method for discharging fluid from a treatment chamber
EP4386128A1 (en) * 2022-12-16 2024-06-19 E.G.O. Elektro-Gerätebau GmbH Water-bearing household appliance

Also Published As

Publication number Publication date
PL2123821T3 (en) 2011-10-31
WO2009141070A1 (en) 2009-11-26
ATE504686T1 (en) 2011-04-15
DE602008006043D1 (en) 2011-05-19
EP2123821B1 (en) 2011-04-06
ES2364599T3 (en) 2011-09-07

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