EP0736626B1 - Dispositif intégré pour la circulation de l'eau avec deux pompes indépendantes et un filtre commun pour machines à laver - Google Patents

Dispositif intégré pour la circulation de l'eau avec deux pompes indépendantes et un filtre commun pour machines à laver Download PDF

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Publication number
EP0736626B1
EP0736626B1 EP95202612A EP95202612A EP0736626B1 EP 0736626 B1 EP0736626 B1 EP 0736626B1 EP 95202612 A EP95202612 A EP 95202612A EP 95202612 A EP95202612 A EP 95202612A EP 0736626 B1 EP0736626 B1 EP 0736626B1
Authority
EP
European Patent Office
Prior art keywords
housings
unit
filter
flow directing
impeller
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.)
Expired - Lifetime
Application number
EP95202612A
Other languages
German (de)
English (en)
Other versions
EP0736626A3 (fr
EP0736626A2 (fr
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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 Candy SpA filed Critical Candy SpA
Publication of EP0736626A2 publication Critical patent/EP0736626A2/fr
Publication of EP0736626A3 publication Critical patent/EP0736626A3/fr
Application granted granted Critical
Publication of EP0736626B1 publication Critical patent/EP0736626B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 concerns an integral flow directing filter unit for washing machines and the like.
  • a single pump is used in combination with a diverting valve to convey the wash liquid to a drainage outlet or alternatively to a recirculation path.
  • two separate pumps are utilised to convey the washing liquid respectively to a drainage outlet or into the recirculation path.
  • the first approach necessitates the use of a diverting valve which must satisfy the requirement of providing a perfect seal at the diversion point, failing which, after repeated operation liquid lost through the drain results in the gradual emptying of the washing vessel during recirculation, with the risk of failure of the washing machine due to insufficient residual liquid in the washing vessel.
  • the dual hydraulic circuit does not allow the use of an appropriate single filter acting both in the drainage and the recirculation circuit.
  • the dual hydraulic circuit also removes a certain quantity of water from the washing circuit which can be considered lost for washing purpose.
  • FR-A-1 336 973 discloses a double pump with a single motor.
  • the integral flow-directing unit with two independent pumps and a common filter which is the subject of the present invention provides a filter and a pair of structurally independent pumping means combined in a single monobloc structure.
  • the unit requires a single mechanical support rather than separate supports for separate functional units.
  • the unit has a single attachment on the body for connecting the wash vessel directly to the unit so as to reduce pipework to a minimum, and consequently to reduce also the volume of liquid which is not directly involved in the washing process.
  • the design of the unit is such that it can be made by moulding plastics materials using relatively simple methods with a reduced number of dies and related operations.
  • a first part of the unit is made as a housing body for the pumps which are separated by a common delivery chamber communicating with a second part of the unit in which a housing for a filtration element is formed.
  • This can be made in various ways, such as a barrier filter, in alignment with a self cleaning circuit with a filter opening, or as a conventional mesh filter.
  • Brackets are formed integrally with the body to join the unit to the moving part of the washing machine.
  • the integral flow directing unit comprises a moulded body 1 in plastics material, a removable filter 2 with a front closure plug 3 and two motor units 4, 5 which drive the pump impeller 6, provided with flanges 7, 8 for coupling to the body 1 and closing the associated impeller housings.
  • Two portions can be essentially distinguished in the unitary body 1.
  • a first portion forms two axially aligned cylindrical housings, open at their outer ends, with annular flanges respectively 9, 10 for coupling to respective flanges 7, 8 of the motor units.
  • Each of the two housings comprises the body of a centrifugal pump with an impeller 6, driven respectively by the two motor units 4, 5 and a peripheral delivery outlet respectively 11, 12 and an axial intake opening one of which 30, visible in Figure 1, allows the two housings to communicate with a chamber located axially between them which opens into a cylindrical filter housing 14 to the peripheral wall of which is connected an intake opening 15.
  • the body 1 is provided on the outer sides of the filter housing 14 with two mounting brackets 16, 17 reinforced with ribs and having bosses 18, 19 for self-tapping screws.
  • Figures 2 to 5 represent various views and sections of the body 1 to show more clearly the structural characteristics and its formation using a relatively simply constructed mould with a reduced number of moving parts.
  • the filter housing is constructed from two axially aligned cylindrical bodies 20, 21 (Figure 5) the outermost one 20, of greater diameter, being connected to the other by means of a shoulder 22 which has an annular ridge 23 for cooperation with a seal 24 (Figure 1) on the filter plug to ensure sealing of the filter housing.
  • the body 20 comprises a plug housing and has on its edge two opposing retaining teeth 25, 26 for the engagement and bayonet fitting of the plug 3 which has in its turn ribs (as 25, Figure 1) for cooperation with the teeth 25, 26.
  • the inner body 21 constitutes the filter housing and the intake opening 15 is joined to and opens into its periphery.
  • the body 21 Internally the body 21 is joined to and communicates with a suction chamber 27 positioned between the two impeller housings 28, 29 and communicates with these through two apertures 30, 31.
  • the filter and plug housing, the suction chamber and the front part of the mounting brackets 16, 17 can be easily obtained with a die closed in the direction indicated by the arrow 32 which is provided with a pair of retractable teeth to form the necessary undercuts for the teeth 25, 26.
  • the impeller housings 28, 29 and the associated flanges 9, 10 having sites for screw engagement, and possible registration pins are easily made using two opposing mould dies which are closed in the direction indicated by the arrows 33, 34.
  • the impeller housings 28, 29 of a generically cylindrical shape, communicate with the suction chamber positioned between them via the axial apertures 30, 31.
  • the delivery outlets 11, 12 are connected to their periphery.
  • the liquid is sucked from the inlet 15, enters into the filter chamber through the filter, passes into the suction chamber 27 and from there to the impeller housing corresponding to the activated motor from where it is expelled through the associated outlet 11 or 12 to be directed to the drainage outlet or into the recirculation circuit.
  • outlets 11, 12 and inlet 15 are advantageously positioned along parallel axes, with a degree of inclination relative to the axis of the filter chamber.
  • a fifth die closed in the direction of the arrow 36 allows the formation of the lower part of the body 1, which is undercut with respect to the pump bodies and associated flanges 9, 10.
  • the upper exterior part of the inlet 15 is formed by a die closed in the direction indicated by the arrow 37.
  • the unitary body 1 is completed by attaching the two flanged motor units 4 and 5.
  • the rotor housing is externally enclosed by the extensions of field poles 42, 43 which extend in two stator columns closed with a yoke.
  • stator columns On the stator columns are two electrical excitation coils supplied by the alternating mains voltage.
  • a conventional mesh or labyrinth filter may be substituted for the diaphragm filter shown in Figure 2.
  • the structure of the flow directing unit can be simplified by eliminating the filter housing completely and attaching the intermediate suction chamber directly to the inlet 15, in this case positioned at an angle or in relative opposition to the outlets 11 and 12.
  • the filter housing is replaced by the inlet 15, the diameter of which must be sufficient to form at its end, and as an extension of itself, an intake chamber with dimensions suitable to keep the pressure drop between predetermined limits for a predetermined flow rate of liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (4)

  1. Unité directrice de flux intégrale à deux pompes indépendantes, comprenant un corps unitaire (1) en matière plastique moulée, le dit corps formant deux logements axialement alignés (28, 29), chacun étant un logement d'un rotor de pompe centrifuge (6), ouverts à leurs extrémités extérieures axiales, deux sorties de refoulement (11, 12) ouvertes à la périphérie des dits logements (28, 29), caractérisée en ce qu'elle comprend deux unités de moteur indépendantes (4, 5) avec un rotor (6) couplé au dit corps (1) et fermant les dites ouvertures d'extrémité des dits logements de rotors (28, 29), une chambre d'aspiration (27) positionnée axialement entre ces deux logements (28, 29) et en communication avec ces derniers par l'intermédiaire de deux ouvertures axiales (30, 31) et des moyens raccordant la dite chambre d'aspiration (27) à une entrée (15).
  2. Unité selon la revendication 1, dans laquelle le dit corps (1) forme un logement de filtre cylindrique (21), avec un axe perpendiculaire aux axes des dits logements de rotors (28, 29), ouvert à une première extrémité pour permettre l'insertion amovible d'un filtre (2) et en communication, à l'autre extrémité, avec la dite chambre d'aspiration (27), et les dits moyens de raccordement comprenant une entrée (15) débouchant dans la paroi périphérique du dit logement de filtre (21).
  3. Unité selon la revendication 2, dans laquelle les dites sorties de refoulement (11, 12) et la dite entrée (15) ont des axes parallèles, qui sont perpendiculaires aux axes des dits logements (28, 29) et sont inclinés par rapport à l'axe du dit logement de filtre (21).
  4. Unité selon la revendication 1, 2 ou 3, dans laquelle sont prévus des moyens (16, 17) destinés à fixer le dit corps (1) sur un support.
EP95202612A 1995-04-05 1995-09-28 Dispositif intégré pour la circulation de l'eau avec deux pompes indépendantes et un filtre commun pour machines à laver Expired - Lifetime EP0736626B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI950236U 1995-04-05
IT1995MI000236U IT236788Y1 (it) 1995-04-05 1995-04-05 Gruppo integrale di deviazione di flusso a due pompe indipendentie filtro comune per lavatrici e simili

Publications (3)

Publication Number Publication Date
EP0736626A2 EP0736626A2 (fr) 1996-10-09
EP0736626A3 EP0736626A3 (fr) 1997-10-29
EP0736626B1 true EP0736626B1 (fr) 2001-07-11

Family

ID=11370488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95202612A Expired - Lifetime EP0736626B1 (fr) 1995-04-05 1995-09-28 Dispositif intégré pour la circulation de l'eau avec deux pompes indépendantes et un filtre commun pour machines à laver

Country Status (3)

Country Link
EP (1) EP0736626B1 (fr)
DE (1) DE69521681T2 (fr)
IT (1) IT236788Y1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724480A1 (de) * 1997-06-10 1998-12-17 Bosch Siemens Hausgeraete Haushaltsgerät
FR2818671B1 (fr) * 2000-12-26 2003-04-25 Ciapem Dispositif de filtration pour un lave-linge
KR101332286B1 (ko) * 2007-04-17 2013-11-22 삼성전자주식회사 세탁기
KR101460134B1 (ko) * 2007-07-12 2014-11-10 삼성전자 주식회사 세탁기
KR200461049Y1 (ko) 2007-10-22 2012-06-22 삼성전자주식회사 펌프와 이를 구비하는 세탁기
FR2954783B1 (fr) * 2009-12-30 2011-12-23 Fagorbrandt Sas Procede de commande en fonctionnement d'une machine a secher le linge et machine a secher le linge associee.
FR2993162B1 (fr) * 2012-07-12 2016-03-04 Fagorbrandt Sas Machine a laver comprenant un reservoir d'eau de lavage et/ou de rincage
EP2703548A1 (fr) * 2012-08-29 2014-03-05 Electrolux Home Products Corporation N.V. Machine à laver le linge et procédé pour laver le linge dans un lave-linge
EP2703546A1 (fr) 2012-08-29 2014-03-05 Electrolux Home Products Corporation N.V. Machine à laver le linge
EP2703547A1 (fr) 2012-08-29 2014-03-05 Electrolux Home Products Corporation N.V. Machine à laver le linge
EP2746447B1 (fr) * 2012-12-21 2020-04-22 Electrolux Home Products Corporation N.V. Machine à laver le linge avec collecteur d'évacuation comprenant un ensemble de pompe
AU2014415237B2 (en) * 2014-12-23 2020-05-21 Electrolux Appliances Aktiebolag Laundry drying apparatus having a pump for draining liquid
CN105986427B (zh) * 2015-01-27 2019-10-01 青岛海尔洗衣机有限公司 一种洗衣机双头排水泵
CN105986406B (zh) * 2015-01-27 2020-03-20 青岛海尔洗衣机有限公司 一种洗衣机双头排水泵的安装减震装置
DE102016201972B3 (de) * 2016-02-10 2017-03-02 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Laugenpumpe
DE102016202006A1 (de) * 2016-02-10 2017-08-10 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Laugenpumpe
DE102016201975B3 (de) * 2016-02-10 2017-03-02 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Pumpe
CN117248357A (zh) * 2022-06-09 2023-12-19 青岛海尔洗涤电器有限公司 双泵总成及具有该双泵总成的衣物处理设备
CN118498043A (zh) * 2023-02-15 2024-08-16 青岛海尔洗涤电器有限公司 双水路动力装置及洗涤设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB671114A (en) * 1949-02-28 1952-04-30 Edward Aidan Creswick A method of, and apparatus for cleaning garments or fabrics
FR1336973A (fr) * 1962-10-03 1963-09-06 Constructa Werke Gmbh Pompe double destinée particulièrement à une machine à laver et à centrifuger, fonctionnant en courant continu
US3727435A (en) * 1971-12-27 1973-04-17 Gen Motors Corp Self-cleaning lint filter for a recirculating clothes washer
IT1256103B (it) * 1992-11-12 1995-11-28 Candy Spa Gruppo di filtraggio e deviazione di flusso per lavatrice a ricircolo
JPH0716389A (ja) * 1993-07-05 1995-01-20 Matsushita Electric Ind Co Ltd 洗濯機

Also Published As

Publication number Publication date
EP0736626A3 (fr) 1997-10-29
IT236788Y1 (it) 2000-08-17
DE69521681T2 (de) 2003-02-13
ITMI950236U1 (it) 1996-10-05
DE69521681D1 (de) 2001-08-16
ITMI950236V0 (it) 1995-04-05
EP0736626A2 (fr) 1996-10-09

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