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EP1783263A2 - Pompe de machine à laver intégrée à celle-ci. - Google Patents

Pompe de machine à laver intégrée à celle-ci. Download PDF

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Publication number
EP1783263A2
EP1783263A2 EP06022868A EP06022868A EP1783263A2 EP 1783263 A2 EP1783263 A2 EP 1783263A2 EP 06022868 A EP06022868 A EP 06022868A EP 06022868 A EP06022868 A EP 06022868A EP 1783263 A2 EP1783263 A2 EP 1783263A2
Authority
EP
European Patent Office
Prior art keywords
housing
rotor
pump
bowl
motor
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Withdrawn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
EP06022868A
Other languages
German (de)
English (en)
Other versions
EP1783263A3 (fr
Inventor
Gregory Paul Hill
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.)
Fisher and Paykel Appliances Ltd
Original Assignee
Fisher and Paykel Appliances Ltd
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
Priority claimed from NZ54342705A external-priority patent/NZ543427A/en
Priority claimed from NZ543428A external-priority patent/NZ543428A/en
Application filed by Fisher and Paykel Appliances Ltd filed Critical Fisher and Paykel Appliances Ltd
Publication of EP1783263A2 publication Critical patent/EP1783263A2/fr
Publication of EP1783263A3 publication Critical patent/EP1783263A3/fr
Withdrawn legal-status Critical Current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
    • D06F39/085—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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/42—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to filters or 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump

Definitions

  • This invention relates to clothes washing machines and in particular drain or recirculating pumps for such machines.
  • Clothes washing machines require a pump to drain the machine bowl of both wash and rinse water. In machines where wash water is recirculated a pump is required for this purpose also. Hitherto such pumps have taken the form of discrete components mounted outside the washing machine bowl and connected thereto by means of ducts and hoses.
  • the invention consists in a clothes washing machine having an outer bowl which in use selectively contains wash and rinse liquid and a rotary pump driven by an electric motor which drains or recirculates liquid in said bowl, characterized in that:
  • the invention consists in a clothes washing machine having an outer bowl which in use selectively contains wash and rinse liquid and a rotary pump driven by an electric motor which drains and/or recirculates liquid in said bowl, characterised in that:
  • the invention consists in a pump for a clothes washing machine having a water containing outer bowl which drains and/or recirculates liquid in said bowl, said bowl having an aperture in the bottom and said pump having a housing which includes an electric motor, characterised in that:
  • said rotor includes a drive shaft and said impeller is mounted on said drive shaft.
  • a transverse partition is mounted in said housing which separates said rotor and said impeller into separate compartments and which supports a waterproof bearing in a central aperture through which said drive shaft passes and is journalled.
  • said impeller is mounted within said housing proximate to said outer bowl and said rotor is mounted in said housing distal to said outer bowl.
  • said partition has a small aperture therein to allow wash liquid to enter said rotor compartment and to vent pneumatic pressure in said compartment when hot.
  • a filter is mounted in said aperture to prevent foreign objects from entering said rotor compartment.
  • said distal portion of said housing has a cylindrical wall and said cylindrical wall lies between said stator and said rotor.
  • the essence of the present invention is the integration of a drain/recirculation pump (preferably a centrifugal pump) with a washing machine bowl, thereby reducing the number of water connections outside the watertight bowl.
  • a drain/recirculation pump preferably a centrifugal pump
  • Figure 1 One embodiment of the invention is illustrated diagrammatically in Figure 1.
  • a washing machine outer bowl 1 has a floor 2 into which is moulded a cylindrical recess 3 which forms part of the drain/recirculation pump housing.
  • a cylindrical recess 3 forms the lower portion of the pump housing and houses a rotor 4 of an electric motor (generally indicated as 5).
  • the motor stator 6 is mounted exteriorally of the washing machine bowl 2 about the cylindrical wall 14 of recess 3 so as to be co-axial and coplanar with rotor 4.
  • the wall of the pump housing, which forms part of the outer bowl lies in the motor air gap.
  • Motor 5 is preferably a brushless dc motor with the windings of stator 6 commutated electronically.
  • Rotor 4 carries a drive shaft 7 which is connected to a pump impeller 8 which in turn is contained within the upper portion 9 of the pump housing.
  • the pump housing 9 has an inlet 10 in the form of an opening to the interior of outer bowl 1 through which wash and rinse water may flow to be pressurised by impeller 8.
  • the pump outlet duct 11 extends from pump housing 9 within the outer bowl and terminates at a connector 12 to which a flexible hose 13 may be connected to convey drain water external to the bowl.
  • a recirculating outlet (not shown) feeds a pipe contained within the bowl, configured so as to discharge onto the clothes load.
  • the pump 19 is a separate part which is integrated with base 21 of a washing machine outer bowl 20 (see Figures 2 and 3).
  • the bowl is plastics moulded and is of the type disclosed in US Patent 4,813,248 .
  • a drain sump Within base 21 at a suitable drain point near a side wall of the bowl there is moulded a drain sump and in the floor of the sump a flanged aperture 22 is provided. In the preferred form this is elliptical. Pump 19 is mounted in this aperture 22 and when mounted completely closes it off.
  • the pump housing comprises a proximate portion 26 which houses a pump impeller 27 and a distal portion 28 which houses a rotor 29 of an electric motor 64 powering the pump.
  • the housing connects to the bowl base with its axis substantially vertical. With this orientation the distal portion 28 of the housing is lower than the proximate portion which contains the impeller.
  • the lower portion 28 of the pump housing is cylindrical and closed off at the bottom with an integrally moulded floor section 30.
  • the flange 48 of the pump housing 25 fits about the flange of the bowl aperture 22.
  • a static sealing ring 50 which fits around the periphery of housing cap 42 seals the pump housing within the bowl aperture.
  • the housing is fastened to the outer bowl by screws passing through lugs 47 provided about flange 48 of the upper portion 26 of the housing.
  • the pump is of the centrifugal type with impeller 27 configured so as to be capable of pumping when driven in either a clockwise or an anti-clockwise direction.
  • the electric drive motor 64 is of the brushless permanent magnet DC type.
  • the permanent magnet rotor 29 is rotatably mounted within the lower portion 28 of the pump housing. Rotor 29, which in the preferred embodiment may run wet (see below), rotates on a drive shaft 31 which connects to impeller 27.
  • a partition member 33 (see in particular Figure 5) separates the upper and lower portions of the pump housing into an upper compartment 65 and a lower compartment 66 and provides a support for an upper bearing 34 within which drive shaft 31 is journalled.
  • Partition 33 together with dynamic shaft seal prevents materials entrained in the machine wash or rinse water from entering the lower compartment 66 of the pump housing to thereby cause wear or jamming of the rotor.
  • a small aperture 60 is provided in partition member 33 to allow controlled water flow into the lower compartment of the pump housing. The presence of water assists in cooling and lubricating the rotor and bearings 61 and 34.
  • Aperture 60 is preferably provided with a filter (not shown) to exclude particulate matter or other foreign bodies from entering the motor rotor compartment 66. Aperture 60 also vents pneumatic pressure in the rotor compartment when hot.
  • Rotor drive shaft 31 is also journalled in a lower bearing 61 which is supported in a cavity 62 in the floor 30 of the pump housing.
  • the motor stator 35 is mounted on the exterior of the pump housing co-axially with the rotor and in the same principal plane as the rotor about the lower portion 28 of the pump housing.
  • the cylindrical walls of the lower portion of the pump housing reside within the "air gap" between the rotor and stator.
  • the stator may typically be of the salient pole type preferably having six poles 36.
  • the stator being external to the pump housing, is in a dry environment notwithstanding the rotor part of the motor is contained within the pump housing and therefore in essence within the washing machine bowl.
  • the stator is protected by a plastics cover 37 which has a removable base 38 held in place by screws 63.
  • the stator 35 comprises substantially annular laminations of magnetic steel which are over moulded with a plastics case which also covers the integrally formed poles to provide plastic bobbins around which the windings 36 are wound.
  • the pole tips are arcuate and lie on a circle of a diameter equal to the outer diameter of the cylindrical wall of the lower portion of the pump housing. The stator is clamped in place by base 38.
  • the brushless DC motor preferably has a controller which uses the back EMF induced in an unused stator winding to provide the necessary rotor position sensing. Controllers of the type suitable for the present motor are disclosed in US 6,034,493 and WO 2005/062460 .
  • top cap 42 in association with a complementary pump hood 43 which define the water inlet path to the pump. Water from the drain sump enters under the hood and over the top of the scalloped peripheral wall 44 of top cap 42 (which forms a first weir) and into the cap inlet aperture 45 defined by cylindrical wall 46 which forms a second weir.
  • a drain/recirculating pump integrated with a washing machine outer bowl in the manner disclosed ensures a water handling system with reduced leak paths external to the bowl.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP06022868A 2005-11-04 2006-11-02 Pompe de machine à laver intégrée à celle-ci. Withdrawn EP1783263A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ54342705A NZ543427A (en) 2005-11-04 2005-11-04 Integrated washing machine pump
NZ543428A NZ543428A (en) 2005-11-04 2005-11-04 Improvements relating to washing machines

Publications (2)

Publication Number Publication Date
EP1783263A2 true EP1783263A2 (fr) 2007-05-09
EP1783263A3 EP1783263A3 (fr) 2008-05-07

Family

ID=37719343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06022868A Withdrawn EP1783263A3 (fr) 2005-11-04 2006-11-02 Pompe de machine à laver intégrée à celle-ci.

Country Status (4)

Country Link
EP (1) EP1783263A3 (fr)
AU (1) AU2006235808A1 (fr)
CA (1) CA2628450A1 (fr)
WO (1) WO2007053041A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8528369B2 (en) 2009-12-17 2013-09-10 Mabe, S.A. De C.V. Geometric configuration of tub
WO2017039375A1 (fr) * 2015-09-04 2017-03-09 Lg Electronics Inc. Appareil de traitement du linge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008541691A (ja) 2005-05-17 2008-11-20 フェデラル−モーグル コーポレイション 封入された回路基板を有するｂｌｄｃモータおよびポンプアセンブリ

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1218569B (it) * 1987-04-22 1990-04-19 Askoll Srl Pompa centrifiga perfezionata per lavatrici, lavastoviglie ed elettrodomestici in genre
DE3802890A1 (de) * 1988-02-01 1989-08-10 Bosch Siemens Hausgeraete Fluegelrad-laugenpumpe fuer waeschebehandlungs- oder geschirrspuelmaschinen
DE3802889A1 (de) * 1988-02-01 1989-08-10 Bosch Siemens Hausgeraete Wasch- oder geschirrspuelmaschine mit einem laugenbehaelter
DE3820409A1 (de) * 1988-06-15 1989-12-21 Bosch Siemens Hausgeraete Vorrichtung zum umwaelzen von wasch- oder spuellauge in einer trommelwaschmaschine
IT1230395B (it) * 1989-06-07 1991-10-21 Ocean Spa Lavabiancheria con dispositivo di ricircolo del liquido di lavaggio.
IT221916Z2 (it) * 1991-09-27 1994-12-29 Whirlpool Italia Dispositivo di scarico per macchine lavabiancheria e simili
US6478555B1 (en) * 1999-06-16 2002-11-12 Lg Electronics, Inc. Apparatus for controlling noise and vibration for drain pump
JP2003214377A (ja) * 2002-01-22 2003-07-30 Nidec Shibaura Corp ポンプ及びそれを用いた洗濯機、給湯器及び食器洗い機

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8528369B2 (en) 2009-12-17 2013-09-10 Mabe, S.A. De C.V. Geometric configuration of tub
WO2017039375A1 (fr) * 2015-09-04 2017-03-09 Lg Electronics Inc. Appareil de traitement du linge
US10294601B2 (en) 2015-09-04 2019-05-21 Lg Electronics Inc. Laundry treating apparatus

Also Published As

Publication number Publication date
CA2628450A1 (fr) 2007-05-10
EP1783263A3 (fr) 2008-05-07
AU2006235808A1 (en) 2007-05-24
WO2007053041A1 (fr) 2007-05-10

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