EP2085619A1 - Appareil ménager pour laver des articles - Google Patents

Appareil ménager pour laver des articles Download PDF

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Publication number
EP2085619A1
EP2085619A1 EP08150991A EP08150991A EP2085619A1 EP 2085619 A1 EP2085619 A1 EP 2085619A1 EP 08150991 A EP08150991 A EP 08150991A EP 08150991 A EP08150991 A EP 08150991A EP 2085619 A1 EP2085619 A1 EP 2085619A1
Authority
EP
European Patent Office
Prior art keywords
central hub
impeller
blade
household appliance
washing articles
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
EP08150991A
Other languages
German (de)
English (en)
Other versions
EP2085619B1 (fr
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 EP08150991A priority Critical patent/EP2085619B1/fr
Priority to DE602008006007T priority patent/DE602008006007D1/de
Priority to PL08150991T priority patent/PL2085619T3/pl
Priority to AT08150991T priority patent/ATE504744T1/de
Priority to PCT/EP2008/010896 priority patent/WO2009095065A1/fr
Priority to CN2008801257909A priority patent/CN101925747B/zh
Publication of EP2085619A1 publication Critical patent/EP2085619A1/fr
Application granted granted Critical
Publication of EP2085619B1 publication Critical patent/EP2085619B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/247—Vanes elastic or self-adjusting
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump

Definitions

  • the present invention relates to a household appliance for washing articles.
  • the present invention relates to a laundry washing machine or dishwasher having an electric water drain pump, to which the following description refers purely by way of example.
  • laundry washing machines and dishwashers are normally equipped with an electric water pumps for drainage.
  • These type of pump has an impeller connected to the end of an electric motor shaft, which rotates about a central rotation axis inside a pumping chamber having an intake duct and a duct.
  • the impeller is connected mechanically to the electric motor shaft by an articulated joint or clutch, which allows a certain amount of free relative rotation (e.g. 120°) between the shaft and impeller, so that, when the electric motor is started, the electric motor shaft initially rotates substantially idly to greatly reduce the starting torque and electric current peaks.
  • the high hydraulic inertia of the stationary water in the pumping chamber in fact, initially generates a high resisting torque on the impeller, and hence on the electric motor shaft.
  • a household appliance for washing articles as claimed in Claim 1 and preferably, though not necessarily, in any one of the dependent Claims.
  • number 1 indicates as a whole a household appliance for washing having an hydraulic circuit for circulating the washing liquid in the appliance and/or draining the washing liquid from the appliance at the end of the washing cycle.
  • household appliance 1 is a home laundry washing machine 1, which comprises a casing 2 resting on the floor; a preferably, though not necessarily, cylindrical washing tub 3 suspended in floating manner inside casing 2 by means of a number of coil springs 4 (only one shown in Figure 1 ) preferably, though not necessarily, combined with one or more shock-absorbers (not shown); a rotary drum 6 housed inside washing tub 3 to rotate about its longitudinal axis; and an hydraulic circuit 7 for feeding or draining water to or from washing tub 3 on command.
  • a home laundry washing machine 1 which comprises a casing 2 resting on the floor; a preferably, though not necessarily, cylindrical washing tub 3 suspended in floating manner inside casing 2 by means of a number of coil springs 4 (only one shown in Figure 1 ) preferably, though not necessarily, combined with one or more shock-absorbers (not shown); a rotary drum 6 housed inside washing tub 3 to rotate about its longitudinal axis; and an hydraulic circuit 7 for feeding or draining water to or from washing tub 3 on command.
  • hydraulic circuit 7 has an electric pump 8 for circulating or draining water, and which comprises an outer volute 9 having an inner pumping chamber 9a, which communicates with the outside, i.e. with the water pipes of hydraulic circuit 7, via two openings defining the inlet 8a and outlet 8b of the pump respectively; an impeller 10 housed in axially rotating manner inside pumping chamber 9a to rotate about a barycentric axis A of rotation preferably, though not necessarily, coincident with the longitudinal axis of outer volute 9; and a rotary electric motor 11 (e.g.
  • a synchronous permanent-magnet electric motor or an asynchronous permanent-magnet, synchronous or asynchronous motor
  • a synchronous permanent-magnet electric motor or an asynchronous permanent-magnet, synchronous or asynchronous motor
  • outer volute 9 consists of a substantially disk-shaped body 12 formed in one piece with the outer casing of electric motor 11 so that the end portion of rotary shaft 11a projects from the center of disk-shaped body 12; and of a substantially cup-shaped body 13 fitted removably to disk-shaped body 12 in fluidtight manner to internally define pumping chamber 9a of impeller 10.
  • disk-shaped body 12 is coaxial with the longitudinal axis of the outer casing or volute 9, i.e. with barycentric axis A, and rotary shaft 11a is inserted inside disk-shaped body 12 in rotary and fluidtight manner.
  • Cup-shaped body 13 is screwed to disk-shaped body 12, and has an axial intake duct 14 extending coaxially with the longitudinal axis of outer volute 9, i.e. with barycentric axis A; and a radial drain duct 15 extending laterally with respect to cup-shaped body 13 (i.e. perpendicular to the longitudinal axis of outer volute 9).
  • a flexible annular washer 16 is preferably, though not necessarily, fitted between cup-shaped body 13 and disk-shaped body 12 to prevent water leakage.
  • impeller 10 of electric pump 8 is housed inside cup-shaped body 13, i.e. inside pumping chamber 9a, rotates about barycentric axis A, and comprises a preferably, though not necessarily, ogival-shaped central hub 17 extending coaxially with barycentric axis A and fitted rigidly to the end of rotary shaft 11a; and one or more (four in the example shown) projecting blades 18 fitted to central hub 17 and preferably, though not necessarily, equally spaced angularly about central hub 17.
  • each blade 18 of electric pump 8 is fixed to central hub 17 so as to be movable between a fully retracted position, in which blade 18 is almost totally withdrawn inside central hub 17 (see Figure 3 ), and a fully extracted position, in which blade 18 projects from central hub 17 by almost its whole length measured perpendicular to rotation axis A (see Figure 4 ), so that the outer lateral edge 18a of the blade is further from rotation axis A than when blade 18 is in the fully retracted position.
  • impeller 10 also comprises means for controlling the position of the movable projecting blades 18 on central hub 17 according to the instantaneous angular speed of impeller 10.
  • impeller 10 comprises means for counteracting centrifugal force and moving each movable projecting blade 18 into the fully retracted position when the angular speed of central hub 17 falls below a given value.
  • each movable projecting blade 18 consists of a substantially trapezoidal plate-like fin 18, which lies in a radial plane intersecting rotation axis A of central hub 17, and is inserted in sliding manner inside a respective radial slot 17a formed in the body of central hub 17; and the means for controlling the position of the movable projecting blades 18 comprise a number of coil springs 19, each of which is housed in a respective radial slot 17a in central hub 17, and has a first end fixed to the bottom of the radial slot 17a, and a second end fixed to the fin body, so as to pull the whole fin 18 onto the bottom of respective radial slot 17a.
  • each coil spring 19 is designed to counteract the centrifugal force and elastically keep the respective movable projecting blade 18 in the fully retracted position whenever the angular speed of central hub 17 is below a given value.
  • coil springs 19 counteract the centrifugal force and keep the movable projecting blades 18 in the fully retracted position inside central hub 17, to prevent impeller 10 generating a high resisting torque when rotating in the stationary water inside pumping chamber 9a.
  • electric pump 8 has numerous advantages. By virtue of the design of impeller 10, electric pump 8 does not need an articulated joint or clutch between impeller 10 and shaft 11a of electric motor 11 to reduce the starting torque requested of electric motor 11.
  • impeller 10 of electric pump 8 may comprise one or more movable projecting blades 18, and one or more fixed projecting blades 18 connected rigidly to central hub 17 with no radial displacement.
  • household appliance 1 may be a dishwasher.
  • electric pump 8 is used to circulate or drain dishwashing water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP08150991A 2008-02-01 2008-02-01 Appareil ménager pour laver des articles Not-in-force EP2085619B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP08150991A EP2085619B1 (fr) 2008-02-01 2008-02-01 Appareil ménager pour laver des articles
DE602008006007T DE602008006007D1 (de) 2008-02-01 2008-02-01 Haushaltsgerät zum Waschen von Artikeln
PL08150991T PL2085619T3 (pl) 2008-02-01 2008-02-01 Urządzenie gospodarstwa domowego do prania/mycia artykułów
AT08150991T ATE504744T1 (de) 2008-02-01 2008-02-01 Haushaltsgerät zum waschen von artikeln
PCT/EP2008/010896 WO2009095065A1 (fr) 2008-02-01 2008-12-19 Appareil domestique pour laver des articles
CN2008801257909A CN101925747B (zh) 2008-02-01 2008-12-19 洗涤物品的家用电器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08150991A EP2085619B1 (fr) 2008-02-01 2008-02-01 Appareil ménager pour laver des articles

Publications (2)

Publication Number Publication Date
EP2085619A1 true EP2085619A1 (fr) 2009-08-05
EP2085619B1 EP2085619B1 (fr) 2011-04-06

Family

ID=39485111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08150991A Not-in-force EP2085619B1 (fr) 2008-02-01 2008-02-01 Appareil ménager pour laver des articles

Country Status (6)

Country Link
EP (1) EP2085619B1 (fr)
CN (1) CN101925747B (fr)
AT (1) ATE504744T1 (fr)
DE (1) DE602008006007D1 (fr)
PL (1) PL2085619T3 (fr)
WO (1) WO2009095065A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2965775A1 (fr) * 2010-10-11 2012-04-13 Peugeot Citroen Automobiles Sa Pompe pour liquide de lavage de vehicule automobile
EP3209827A4 (fr) * 2014-10-24 2018-06-06 LG Electronics Inc. Pompe de vidange et sèche-linge pourvu de ladite pompe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558319A1 (de) * 1975-12-23 1977-07-07 Daimler Benz Ag Kreiselpumpe
JPS59115484A (ja) * 1982-12-21 1984-07-03 Toshiba Corp 回転摺動構造体
US4651040A (en) * 1984-01-02 1987-03-17 Robert Bosch Gmbh Induction motor
FR2711395A1 (fr) * 1993-10-20 1995-04-28 Arnaud Joel Moteur ou pompe universelle pour tous fluides et surtout la vapeur.
DE102004051561A1 (de) * 2004-10-22 2006-05-04 Siemens Ag Flügelzellenpumpe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2616238A1 (de) * 1976-04-13 1977-11-03 Daimler Benz Ag Kreiselpumpe
CN1546868A (zh) * 2003-12-04 2004-11-17 北京本然科技有限公司 高势比、内减摩、向心增压离心泵及其技术组合方法与实例

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558319A1 (de) * 1975-12-23 1977-07-07 Daimler Benz Ag Kreiselpumpe
JPS59115484A (ja) * 1982-12-21 1984-07-03 Toshiba Corp 回転摺動構造体
US4651040A (en) * 1984-01-02 1987-03-17 Robert Bosch Gmbh Induction motor
FR2711395A1 (fr) * 1993-10-20 1995-04-28 Arnaud Joel Moteur ou pompe universelle pour tous fluides et surtout la vapeur.
DE102004051561A1 (de) * 2004-10-22 2006-05-04 Siemens Ag Flügelzellenpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2965775A1 (fr) * 2010-10-11 2012-04-13 Peugeot Citroen Automobiles Sa Pompe pour liquide de lavage de vehicule automobile
EP3209827A4 (fr) * 2014-10-24 2018-06-06 LG Electronics Inc. Pompe de vidange et sèche-linge pourvu de ladite pompe
US10280553B2 (en) 2014-10-24 2019-05-07 Lg Electronics Inc. Drain pump and clothes dryer having a drain pump

Also Published As

Publication number Publication date
EP2085619B1 (fr) 2011-04-06
WO2009095065A1 (fr) 2009-08-06
DE602008006007D1 (de) 2011-05-19
CN101925747A (zh) 2010-12-22
CN101925747B (zh) 2012-11-28
PL2085619T3 (pl) 2011-08-31
ATE504744T1 (de) 2011-04-15

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