EP2420609B1 - Laugenpumpe für wasserführende Haushaltgeräte und wasserführendes Haushaltgerät - Google Patents

Laugenpumpe für wasserführende Haushaltgeräte und wasserführendes Haushaltgerät Download PDF

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Publication number
EP2420609B1
EP2420609B1 EP11176799.2A EP11176799A EP2420609B1 EP 2420609 B1 EP2420609 B1 EP 2420609B1 EP 11176799 A EP11176799 A EP 11176799A EP 2420609 B1 EP2420609 B1 EP 2420609B1
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EP
European Patent Office
Prior art keywords
water
drain pump
suction pipe
pump
suction
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.)
Active
Application number
EP11176799.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2420609A3 (de
EP2420609A2 (de
Inventor
Edwin Bolduan
Raymond Römer
Marcel Werner
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL11176799T priority Critical patent/PL2420609T3/pl
Publication of EP2420609A2 publication Critical patent/EP2420609A2/de
Publication of EP2420609A3 publication Critical patent/EP2420609A3/de
Application granted granted Critical
Publication of EP2420609B1 publication Critical patent/EP2420609B1/de
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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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid 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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour

Definitions

  • the present invention relates to a drain pump for water-bearing household appliances according to the preamble of claim 1 and to a water-bearing household appliance, in particular a laundry treatment machine, with such a drain pump.
  • the working liquid is sucked in through the pumping system by means of a liquid pump, which is connected to the container receiving the working liquid via a drain line, and via an upward line on the pressure side of the pump into the sewage network or for the further Work process conveyed into the work container.
  • the amount of air or foam affects both the flow rate and the delivery pressure of the pump. Increasing air or foam proportions tend to lead to decreasing flow rates and pump pressures, but also to decreasing connected loads for pump operation.
  • sucked-in air bubbles remain in the suction pipe of the pump and thus impair the delivery flow and the delivery pressure of the pump sinks.
  • the cross-section in the suction tube through which the liquid flows narrows and the suction power decreases.
  • the flow is set in rotation over a longer area or introduced rotating into the pressure chamber of the pump.
  • the lighter medium, air collects in the center of the intake pipe, where it forms vortices that can spread over the entire length of the intake pipe.
  • the vortex created in the suction pipe prevents the liquid to be pumped from being pumped out. This process often leads to the point that the flow can completely break off. The result is malfunctions when pumping, which can only be counteracted by targeted additional measures.
  • a mechanical variant of the solution is proposed for removing the foam in a dishwasher.
  • a centrifuge with a plate-shaped bottom part is provided in the circulation circuit.
  • the mixture of foam and washing solution enters the centrifuge axially and is accelerated radially outwards on a spiral path by the plate-shaped bottom part. Due to the very different densities of water and foam, centrifugal forces of different strengths act on the two components of the washing liquor, whereby the foam is destroyed during acceleration.
  • the DE 195 37 944 A1 relates to an emptying pump to pump lye from washing machines or the like from a tub.
  • a so-called foreign body trap which is separated from the pump housing by an intermediate plate, is connected upstream of the pump housing. Air that collects in the pump housing can get into the foreign body trap through at least one ventilation opening in the intermediate plate and escape from it through a ventilation opening provided in the outer wall of the foreign body trap.
  • a drain pump of the type mentioned is known, in the pump chamber of which there is a preliminary guide device with a hollow cylindrical part (suction pipe) lying essentially horizontally in the chamber.
  • suction pipe a hollow cylindrical part lying essentially horizontally in the chamber.
  • at least one flat wing is arranged on the outer surface of the suction pipe, which extends in the axial direction of the suction pipe.
  • the invention is based on the object of modifying known drain pumps with simple means so that their delivery rate with a high proportion of air and foam is improved and to create a water-bearing household appliance with a drain pump, which ensures a stable delivery process with short program times.
  • the drain pump designed according to the invention With the drain pump designed according to the invention, their ventilation is improved and the flow rate stabilized.
  • the proposed measures on the feed pump can avoid interruptions in pumping, the entire pumping process can be run through in a shortened time, even with a high proportion of air or foam in the working fluid to be pumped, with stable operating states and thus the maximum possible flow rate.
  • the pump shows an improved start-up behavior. The noise level during the start-up phase is greatly reduced. Another advantage is that the shorter and more efficient pumping-out processes reduce wear on the pump.
  • the drain pump according to the invention has an overhead ventilation duct in the suction pipe which connects the pump antechamber with the pump pressure chamber.
  • the air bubbles in the conveying flow can exit the suction pipe via the ventilation duct and be diverted against the incoming working fluid via the upwardly inclined drainage hose.
  • At least one baffle wall is arranged radially on the outside of the intake pipe parallel to the ventilation duct.
  • the arrangement of the baffles on the intake pipe acts as a swirl brake and thus prevents the formation of eddies.
  • at least one inclined or curved axial rib is arranged on the outside of the intake pipe. The inclined or curved axial ribs are aligned with the connection piece on the suction side. The ribs result in aerodynamic advantages which lead to a further improvement in the pumping process.
  • the water-carrying household appliance in particular a laundry washing machine, comprises the drain pump according to the invention, which is arranged in a connected solution drain system of the household appliance.
  • the use of such a drain pump is therefore particularly advantageous in washing machines, since such a mixture of water and foam can also be conveyed away quickly and reliably. In this way, a stable process sequence can be ensured even with laundry washing machines with a larger drum volume and shorter program times.
  • the Figures 1 and 2 show the drain pump 1 of a laundry washing machine 17 consisting of a pump housing 2 with an impeller 9, which is driven by a motor 8, and a filter insert 3 which can be connected to the pump housing 2 in a liquid-proof manner.
  • the fluid connection between the drain pump 1 and the tub takes place via a drain hose 7 which is attached to the suction port 5 of the pump housing 2 with a slight incline towards the tub.
  • the drainage hose 6 is attached to the connection piece 4 of the drain pump 1 and is connected to the pump 1 in a mechanically solid and liquid-proof manner.
  • the pumped-off liquid is discharged to the outside via the drainage hose 6.
  • the partition 14 between the antechamber 16 and the pressure chamber 15 of the drain pump 1 has a circular opening in the center, to which the suction pipe 13 is attached.
  • it is provided with an axially aligned vent duct 11 located at the top.
  • two baffle walls 10 are inserted parallel to the ventilation duct 11, angularly offset by approximately 180 °.
  • the baffle walls 10 act as a swirl brake, whereby the formation of eddies in the liquid to be conveyed can be suppressed.
  • curved ribs 12 are arranged on the outer jacket of the intake pipe 13 .
  • the curved ribs 12 have a positive effect on the flow behavior in the antechamber 16, especially when a mixture of foam and water is to be conveyed.
  • the suction pipe 13 is made of a plastic.
  • the baffle walls 10 and the curved ribs 12 are formed from the same material consisting of the intake pipe.
  • the implementation of the invention is very simple. The effort required is limited to a structural change in the filter insert 3 and a change in the production tools required for this.
  • the Fig. 3 shows a laundry washing machine 17 with the drain pump described above, which is arranged in the lower front area, in or behind a front panel 18 and which is connected to a drain hose 7 from a tub 19 and to an emptying hose 6, through which the liquor to be pumped out of the washing machine is discharged can be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP11176799.2A 2010-08-20 2011-08-08 Laugenpumpe für wasserführende Haushaltgeräte und wasserführendes Haushaltgerät Active EP2420609B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11176799T PL2420609T3 (pl) 2010-08-20 2011-08-08 Pompa środka myjącego do prowadzących wodę urządzeń gospodarstwa domowego i prowadzące wodę urządzenie gospodarstwa domowego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010039566A DE102010039566A1 (de) 2010-08-20 2010-08-20 Laugenpumpe für wasserführende Haushaltgeräte und wasserführendes Haushaltgerät

Publications (3)

Publication Number Publication Date
EP2420609A2 EP2420609A2 (de) 2012-02-22
EP2420609A3 EP2420609A3 (de) 2017-08-30
EP2420609B1 true EP2420609B1 (de) 2020-12-30

Family

ID=44677437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11176799.2A Active EP2420609B1 (de) 2010-08-20 2011-08-08 Laugenpumpe für wasserführende Haushaltgeräte und wasserführendes Haushaltgerät

Country Status (3)

Country Link
EP (1) EP2420609B1 (pl)
DE (1) DE102010039566A1 (pl)
PL (1) PL2420609T3 (pl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2746441A1 (de) 2012-12-18 2014-06-25 Miele & Cie. KG Verfahren zum Betreiben eines wasserführenden Haushaltsgerätes und wasserführendes Haushaltsgerät
US10321797B2 (en) 2013-08-02 2019-06-18 Electrolux Home Products, Inc. Pump plate for conditioning fluid flow in a dishwasher
DE102014210626B4 (de) * 2014-06-04 2020-06-18 BSH Hausgeräte GmbH Haushaltsgerät mit einem Laugenbehälter
CN109779977B (zh) * 2017-11-14 2022-07-12 青岛海尔洗涤电器有限公司 一种双头泵壳体结构及洗衣机
KR102543851B1 (ko) 2018-05-16 2023-06-16 삼성전자주식회사 세탁기

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4133554A1 (de) 1991-10-10 1993-04-15 Bauknecht Hausgeraete Haushaltgeraet, z. b. wasch- oder geschirrspuelmaschine
DE4302497A1 (de) * 1993-01-29 1994-08-04 Massindustrie Gmbh Drehrichtungsunabhängige Strömungspumpe mit einem Synchronmotor
DE19537944A1 (de) * 1995-10-12 1997-04-17 Aeg Hausgeraete Gmbh Entleerungspumpe für Waschmaschinen oder dergl.
DE19752296A1 (de) 1997-11-26 1999-05-27 Aeg Hausgeraete Gmbh Trommelwaschmaschine
EP1024292B1 (de) * 1999-01-26 2004-08-04 Wilo Ag Kreiselpumpe mit Gasabscheidekammer
DE10234472A1 (de) 2002-07-29 2004-02-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Beseitigen von Schaum im Laugenbehälter einer Trommelwaschmaschine
DE102008054998B3 (de) * 2008-12-19 2010-06-17 BSH Bosch und Siemens Hausgeräte GmbH Waschmaschine, für die Waschmaschine geeignetes Pumpensystem sowie Verfahren zu ihrem Betrieb

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PL2420609T3 (pl) 2021-06-28
EP2420609A3 (de) 2017-08-30
EP2420609A2 (de) 2012-02-22
DE102010039566A1 (de) 2012-02-23

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