EP1887126A1 - Pompe à eau entraînée par un moteur électrique pour une machine à laver - Google Patents

Pompe à eau entraînée par un moteur électrique pour une machine à laver Download PDF

Info

Publication number
EP1887126A1
EP1887126A1 EP06118507A EP06118507A EP1887126A1 EP 1887126 A1 EP1887126 A1 EP 1887126A1 EP 06118507 A EP06118507 A EP 06118507A EP 06118507 A EP06118507 A EP 06118507A EP 1887126 A1 EP1887126 A1 EP 1887126A1
Authority
EP
European Patent Office
Prior art keywords
rotation axis
water pump
impeller
pumping
electric 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Withdrawn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
EP06118507A
Other languages
German (de)
English (en)
Inventor
Stefano Galassi
Marco Giovagnoni
Simone Sacilotto
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 EP06118507A priority Critical patent/EP1887126A1/fr
Publication of EP1887126A1 publication Critical patent/EP1887126A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2216—Shape, geometry
    • 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
    • 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 an electric motor-driven water pump for a washing machine.
  • the electric motor-driven water pump according to the present invention may be used to particular advantage for drainage, to which the following description refers purely by way of example.
  • Washing machines are normally equipped with electric motor-driven water pumps for drainage.
  • An example of an electric motor-driven water drain pump for a washing machine is described in EP1571252A1 .
  • An electric motor-driven water drain pump for a washing machine has an impeller connected to an electric motor shaft rotating about a central rotation axis inside a pumping chamber having an intake duct and a drain duct.
  • the impeller is connected mechanically to the electric motor shaft by an articulated joint, which allows a certain amount of relative rotation (e.g. 120°) between the shaft and impeller, so that, when the electric motor is started, the electric motor shaft, as opposed to immediately rotating the impeller, initially rotates substantially idly to greatly reduce peak starting current.
  • 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.
  • the articulated joint has several drawbacks, by containing a certain amount of grease, which may lose its properties during the working life of the joint, thus resulting in noise or even jamming of the joint. It has been proposed to eliminate the articulated joint. In this case, however, a much more powerful electric motor is required to counteract the high hydraulic inertia of the stationary water in the pumping chamber, thus greatly increasing cost and size.
  • an electric motor-driven water pump for a washing machine as claimed in the accompanying Claims.
  • Water pump 1 comprises a rotor housing 2 having a coupling flange 3 connectable to a stator casing 4 to form a pumping chamber 5 for an impeller 6.
  • the electrical part of the pump which is known, comprises an electric motor 7 (e.g. a synchronous permanent-magnet electric motor, or an asynchronous permanent-magnet, synchronous or asynchronous motor), housed inside rotor housing 2 and having a revolving shaft 8 connected directly and rigidly to impeller 6 to rotate impeller 6 about a central rotation axis 9. It is important to point out that impeller 6 is connected directly and rigidly to shaft 8 of electric motor 7 with no articulated joint in between, and therefore with no degree of freedom between impeller 6 and shaft 8 of electric motor 7.
  • an electric motor 7 e.g. a synchronous permanent-magnet electric motor, or an asynchronous permanent-magnet, synchronous or asynchronous motor
  • Stator casing 4 which is fixed to the washing machine casing, comprises a substantially dome-shaped body 10 fitted removably and in fluidtight manner to rotor housing 2 to internally define pumping chamber 5 for impeller 6.
  • Dome-shaped body 10 has an axial intake duct 11 extending along (i.e. coaxial with) rotation axis 9 of impeller 6; and a radial drain duct 12 extending laterally with respect to dome-shaped body 10 (i.e. perpendicular to rotation axis 9).
  • a flexible spacer 13 may be fitted between coupling flange 3 of rotor housing 2 and stator casing 4. Flexible spacer 13 acts as a seal for ensuring sealed coupling of coupling flange 3 and rotor housing 2, and also as a vibration-damper for preventing vibration being transmitted from rotor housing 2 to stator casing 4.
  • impeller 6 is housed inside pumping chamber 5, rotates about rotation axis 9, and has a central hub 14 coaxial with rotation axis 9; a round base plate 15 coaxial with rotation axis 9 and surrounding central hub 14; and a number of (e.g. six) pumping blades 16.
  • Each pumping blade 16 is connected at the bottom to base plate 15, and laterally to central hub 14, and is preferably flat and coaxial with rotation axis 9.
  • Each pumping blade 16 of impeller 6 has a top edge 17 on the opposite side to base plate 15, and which is curved so that an axial dimension of pumping blade 16 substantially increases towards rotation axis 9. More specifically, top edge 17 of each pumping blade 16 has a straight inner portion 18 closer to rotation axis 9; and a curved outer portion 19, so that an axial dimension of pumping blade 16 substantially increases towards rotation axis 9.
  • Straight inner portion 18 of top edge 17 of each pumping blade 16 preferably slopes slightly, so that, close to rotation axis 9, an axial dimension of pumping blade 16 decreases towards rotation axis 9.
  • the distance between rotation axis 9 and an inner surface 20 of pumping chamber 5 varies. More specifically, the distance between rotation axis 9 and inner surface 20 of pumping chamber 5 is maximum at drain duct 12 and is minimum opposite drain duct 12.
  • Inner surface 20 of pumping chamber 5 preferably has a spiral (e.g. a logarithmic spiral) cross section, and is preferably symmetric with respect to a plane coaxial with rotation axis 9 and through drain duct 12.
  • a spiral e.g. a logarithmic spiral
  • Water pump 1 as described above has numerous advantages, by being easy to implement and highly effective and efficient.
  • impeller 6 does not generate a high initial resisting torque when the water in the pumping chamber is stationary. Consequently, even rigidly connecting impeller 6 and shaft 8 of electric motor 7, a particularly powerful electric motor 7 is not required to rotate impeller 6.
  • water pump 1 as described above provides for high effective flow, and is therefore not penalized with respect to a conventional known water pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP06118507A 2006-08-07 2006-08-07 Pompe à eau entraînée par un moteur électrique pour une machine à laver Withdrawn EP1887126A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06118507A EP1887126A1 (fr) 2006-08-07 2006-08-07 Pompe à eau entraînée par un moteur électrique pour une machine à laver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06118507A EP1887126A1 (fr) 2006-08-07 2006-08-07 Pompe à eau entraînée par un moteur électrique pour une machine à laver

Publications (1)

Publication Number Publication Date
EP1887126A1 true EP1887126A1 (fr) 2008-02-13

Family

ID=37575275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06118507A Withdrawn EP1887126A1 (fr) 2006-08-07 2006-08-07 Pompe à eau entraînée par un moteur électrique pour une machine à laver

Country Status (1)

Country Link
EP (1) EP1887126A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009046856A1 (de) 2008-12-16 2010-06-17 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer Zahnradpumpe
DE102010028614A1 (de) 2010-05-05 2011-11-10 BSH Bosch und Siemens Hausgeräte GmbH Pumpeneinrichtung sowie wasserführendes Hausgerät mit einer solchen
US20120121421A1 (en) * 2010-11-15 2012-05-17 Wait Scott R Flow vector control for high speed centrifugal pumps
CN107075779A (zh) * 2014-10-24 2017-08-18 Lg电子株式会社 排水泵和具有排水泵的衣物干燥机
EP2455616A3 (fr) * 2010-11-23 2017-08-23 Desarrollos Empresariales Valar, S.L. Pompe centrifuge à flux mixte pour piscines
CN107165855A (zh) * 2017-06-16 2017-09-15 无锡小天鹅股份有限公司 排水叶轮和具有其的排水泵组、洗衣机
WO2018052195A1 (fr) * 2016-09-13 2018-03-22 엘지전자 주식회사 Pompe de vidange
KR20180076212A (ko) * 2016-12-27 2018-07-05 엘지전자 주식회사 의류처리장치용 배수펌프
KR20180080578A (ko) * 2017-01-04 2018-07-12 엘지전자 주식회사 임펠러 및 이를 갖는 의류처리장치용 배수펌프
CN110056534A (zh) * 2019-05-14 2019-07-26 汉宇集团股份有限公司 一种叶轮及水泵
CN111946658A (zh) * 2019-05-14 2020-11-17 无锡小天鹅电器有限公司 叶轮、排水泵及衣物处理装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE491596A (fr) *
US2688930A (en) * 1951-01-27 1954-09-14 Moss Albert H De Washing machine pump
DE2907432A1 (de) * 1979-02-26 1980-09-04 Hanning Elektro Werke Pumpe, insbesondere entleerungspumpe fuer haushaltsmaschinen wie wasch- und geschirrspuelmaschinen
EP0338484A2 (fr) * 1988-04-20 1989-10-25 Hanning Elektro-Werke GmbH & Co. Dispositif de vidange d'accumulateur de liquide pour appareils ménagers à circulation d'eau
US4998861A (en) * 1988-12-16 1991-03-12 Hitachi, Ltd. Drainage pump
DE9206667U1 (fr) * 1991-05-24 1992-07-23 Siemens Ag, 8000 Muenchen, De
WO2003072947A1 (fr) * 2002-02-26 2003-09-04 Electrolux Home Products Corporation N.V. Pompe centrifuge

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE491596A (fr) *
US2688930A (en) * 1951-01-27 1954-09-14 Moss Albert H De Washing machine pump
DE2907432A1 (de) * 1979-02-26 1980-09-04 Hanning Elektro Werke Pumpe, insbesondere entleerungspumpe fuer haushaltsmaschinen wie wasch- und geschirrspuelmaschinen
EP0338484A2 (fr) * 1988-04-20 1989-10-25 Hanning Elektro-Werke GmbH & Co. Dispositif de vidange d'accumulateur de liquide pour appareils ménagers à circulation d'eau
US4998861A (en) * 1988-12-16 1991-03-12 Hitachi, Ltd. Drainage pump
DE9206667U1 (fr) * 1991-05-24 1992-07-23 Siemens Ag, 8000 Muenchen, De
WO2003072947A1 (fr) * 2002-02-26 2003-09-04 Electrolux Home Products Corporation N.V. Pompe centrifuge

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009046856A1 (de) 2008-12-16 2010-06-17 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer Zahnradpumpe
DE102010028614A1 (de) 2010-05-05 2011-11-10 BSH Bosch und Siemens Hausgeräte GmbH Pumpeneinrichtung sowie wasserführendes Hausgerät mit einer solchen
WO2011138221A2 (fr) 2010-05-05 2011-11-10 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de pompage et appareil ménager à circulation d'eau équipé d'un dispositif de pompage de ce type
US20120121421A1 (en) * 2010-11-15 2012-05-17 Wait Scott R Flow vector control for high speed centrifugal pumps
EP2453139A3 (fr) * 2010-11-15 2014-08-20 Sundyne Corporation Contrôle de vecteur de débit pour pompes centrifuges à grande vitesse
US8998582B2 (en) * 2010-11-15 2015-04-07 Sundyne, Llc Flow vector control for high speed centrifugal pumps
EP2988006A1 (fr) * 2010-11-15 2016-02-24 Sundyne LLC Contrôle de vecteur de débit pour pompes centrifuges à grande vitesse
EP2455616A3 (fr) * 2010-11-23 2017-08-23 Desarrollos Empresariales Valar, S.L. Pompe centrifuge à flux mixte pour piscines
US10280553B2 (en) 2014-10-24 2019-05-07 Lg Electronics Inc. Drain pump and clothes dryer having a drain pump
CN107075779A (zh) * 2014-10-24 2017-08-18 Lg电子株式会社 排水泵和具有排水泵的衣物干燥机
CN107075779B (zh) * 2014-10-24 2020-03-06 Lg电子株式会社 排水泵和具有排水泵的衣物干燥机
EP3209827A4 (fr) * 2014-10-24 2018-06-06 LG Electronics Inc. Pompe de vidange et sèche-linge pourvu de ladite pompe
WO2018052195A1 (fr) * 2016-09-13 2018-03-22 엘지전자 주식회사 Pompe de vidange
US10793992B2 (en) 2016-09-13 2020-10-06 Lg Electronics Inc. Drain pump
KR20180076212A (ko) * 2016-12-27 2018-07-05 엘지전자 주식회사 의류처리장치용 배수펌프
KR102577087B1 (ko) 2016-12-27 2023-09-12 엘지전자 주식회사 의류처리장치용 배수펌프
KR20180080578A (ko) * 2017-01-04 2018-07-12 엘지전자 주식회사 임펠러 및 이를 갖는 의류처리장치용 배수펌프
KR102537191B1 (ko) 2017-01-04 2023-05-26 엘지전자 주식회사 임펠러 및 이를 갖는 의류처리장치용 배수펌프
CN107165855A (zh) * 2017-06-16 2017-09-15 无锡小天鹅股份有限公司 排水叶轮和具有其的排水泵组、洗衣机
CN110056534A (zh) * 2019-05-14 2019-07-26 汉宇集团股份有限公司 一种叶轮及水泵
CN111946658A (zh) * 2019-05-14 2020-11-17 无锡小天鹅电器有限公司 叶轮、排水泵及衣物处理装置
CN110056534B (zh) * 2019-05-14 2024-03-26 汉宇集团股份有限公司 一种叶轮及水泵

Similar Documents

Publication Publication Date Title
EP1887126A1 (fr) Pompe à eau entraînée par un moteur électrique pour une machine à laver
EP1617084B1 (fr) Pompe de drainage
KR100918876B1 (ko) 수중 분쇄 펌프
EP0834326A3 (fr) Turbopompe à sang
EP2657528A2 (fr) Dispositif de générateur
TW200712339A (en) Fan device
US8376709B2 (en) Impeller of a suction-enforced type and fan-motor having the same
US5975846A (en) Pump for washing-machines, tumble-driers, dishwashers and suchlike
KR101596902B1 (ko) 흡입성능을 개선한 펌프의 흡입커버 및 이를 구비한 펌프
KR20110112367A (ko) 라이너를 포함한 가진 액체 링 펌프
EP1571252A1 (fr) Pompe électrique pour machine à laver ou analogue
KR100741787B1 (ko) 흡입 강화형 임펠러 및 이를 구비한 진공청소기용 팬-모터
CN105257543A (zh) 用于产生真空的叶片泵
JP5118951B2 (ja) 遠心ポンプ用羽根車及び遠心ポンプ
CN100552228C (zh) 排水泵
KR100648895B1 (ko) 수중펌프
KR102287251B1 (ko) 모터
EP4269802A1 (fr) Pompe de vidange de condensat à bruit réduit
JP4675590B2 (ja) 排水ポンプ
JP3788505B2 (ja) 燃料ポンプ
JP6850184B2 (ja) 水中ポンプおよび水中ポンプ用羽根車
KR101404578B1 (ko) 원심펌프용 임펠러
KR200204172Y1 (ko) 압축팬
KR200393376Y1 (ko) 수중펌프
EP1972790A1 (fr) Pompe à fluides

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20080808

17Q First examination report despatched

Effective date: 20080919

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ELECTROLUX HOME PRODUCTS CORPORATION N.V.

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ELECTROLUX HOME PRODUCTS CORPORATION N.V.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150303