EP2730788A2 - Für ein Haushaltsgerät angepasste Flüssigkeitszirkulationspumpe - Google Patents

Für ein Haushaltsgerät angepasste Flüssigkeitszirkulationspumpe Download PDF

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Publication number
EP2730788A2
EP2730788A2 EP13382453.2A EP13382453A EP2730788A2 EP 2730788 A2 EP2730788 A2 EP 2730788A2 EP 13382453 A EP13382453 A EP 13382453A EP 2730788 A2 EP2730788 A2 EP 2730788A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic chamber
stationary element
hydraulic
fluid
pump
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Withdrawn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
EP13382453.2A
Other languages
English (en)
French (fr)
Other versions
EP2730788A3 (de
Inventor
Rodrigo Orue Orue
Mª Jesus Arrieta Cuesta
Ekaitz Larrinaga Hidalgo
Jose Luis Torres Nidaguila
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.)
Coprecitec SL
Coprececitec SL
Original Assignee
Coprecitec SL
Coprececitec SL
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 Coprecitec SL, Coprececitec SL filed Critical Coprecitec SL
Publication of EP2730788A2 publication Critical patent/EP2730788A2/de
Publication of EP2730788A3 publication Critical patent/EP2730788A3/de
Withdrawn legal-status Critical Current

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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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
    • 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
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/428—Discharge tongues
    • 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
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/06—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock of jet type

Definitions

  • the present invention is related to fluid circulation pumps adapted for a household appliance, in particular for a dishwasher.
  • Known circulation pumps comprise a motor assembled in a motor body, a hydraulic body fixed to the motor body and comprising a water inlet passage and a water outlet passage, and an impeller driven by the motor, which is housed inside the hydraulic body.
  • Known circulation pumps comprise a motor body, a hydraulic body, a motor and an impeller.
  • the hydraulic body and the motor body are attached to one another, forming the body of the pump.
  • the motor is housed in the motor body, and the impeller is arranged and centered on the base of the hydraulic body and is driven by the motor.
  • the impeller rotates with respect to an axis of rotation when it is driven by the motor, and its rotation causes a substantially circular flow of the water inside the hydraulic body around the axis of the impeller, aiding in suitably discharging the water from the pump in a substantially tangential manner.
  • Document US 20120224957 A1 discloses a pump of this type.
  • the pump comprises a circular guiding device arranged around the axis of rotation of the impeller, and the guiding device in turn comprises a plurality of blades distributed in a circular manner.
  • the blades are elastic and deform a specific angle according to the force of the water that entered in the pump, thus improving the fluid circulation and discharge according to its characteristics.
  • Document US 5451139 A discloses a pump with a bladed impeller comprising a peripheral diffuser with a plurality of outlet ports and an interspace to convey the fluid from the outlet ports of the diffuser towards an outlet of the pump.
  • the pump further comprises a curved member extending from the diffuser and arranged in the interspace such that it pushes the fluid upwards towards the outlet to discharge it from the pump.
  • Document US 20120224961 A1 discloses a pump with an impeller arranged at the base of the hydraulic body.
  • the pump comprises a plurality of stationary blades which are arranged around the impeller, extending in a circular manner around the impeller and comprising a helicoidal shape.
  • the blades are arranged in a carrier ring extending radially outside the impeller, surrounding said impeller, and are separated from one another by a specific distance in the rotating direction of the impeller.
  • the object of the invention is to provide a circulation pump as described in the claims.
  • the fluid circulation pump of the invention is adapted for a household appliance, mainly for a dishwasher.
  • the pump comprises a motor body, a motor housed in the motor body, a hydraulic body that is attached to the motor body and comprising a fluid inlet passage and a fluid outlet passage, and closure means that are attached to the hydraulic body, a hydraulic chamber where the fluid flows inside the pump from the time it enters through the inlet passage until it exits through the outlet passage being delimited between the hydraulic body and the closure means.
  • the pump further comprises an impeller driven by the motor which is housed at least partially in the hydraulic body and which, when driven by the motor, rotates with respect to an axis of rotation, causing a substantially circular flow of the fluid in the hydraulic chamber, and a stationary element which is adapted for aiding in discharging the fluid flowing in the hydraulic chamber from the pump through the outlet passage of the hydraulic body.
  • the stationary element is attached to at least one of the elements delimiting the hydraulic chamber and is arranged in the hydraulic chamber such that it blocks or resists against the flow of the fluid.
  • the fluid circulation pump 100 of the invention is adapted for a household appliance, mainly for a dishwasher.
  • the fluid is preferably water, and this term will be used hereinafter for the sake of clarity but without being limiting, although if necessary it is evident that the pump 100 of the invention could be used with another type of fluid, preferably a liquid (although it could have solid or quasi-solid residues).
  • the pump 100 comprises a motor body 1, a motor housed in the motor body 1, a hydraulic body 3 attached to the motor body 1, and closure means that are attached to the hydraulic body 3, the closure means preferably being arranged between the motor body 1 and the hydraulic body 3 such that both bodies 1 and 3 are attached to one another by means of the closure means (although this is not mandatory, the bodies 1 and 3 being able to be attached directly to one another the closure means even being arranged between both bodies 1 and 3, being attached at their ends for example).
  • Figure 1 shows a preferred embodiment of the pump 100 of the invention, where a section of the hydraulic body 3 has been made to show the pump 100 more clearly.
  • a hydraulic chamber 6 where the fluid flows inside the pump 100 is delimited between the hydraulic body 3 and the closure means, and the hydraulic body 3 comprises an inlet 30 through which water enters the hydraulic chamber 6 and an outlet 31 through which water exits the hydraulic chamber 6 and therefore the pump 100.
  • the closure means can comprise, for example, a cover 7 and a sealing element 8 (a gasket for example) for the leak-tight sealing of the connection between the cover 7 and the hydraulic body 3, shown schematically and by way of example in Figure 2 , the hydraulic chamber 6 being closed in a leak-tight manner except for the inlet 30 and the outlet 31.
  • the pump 100 further comprises an impeller 4 which is driven by the motor and is housed at least partially and with rotational freedom in the hydraulic chamber 6.
  • the impeller 4 rotates with respect to an axis of rotation 4b, causing a substantially circular flow of the water in the hydraulic chamber 6, aiding in suitably discharging the water from the pump 100 through the outlet 31.
  • the outlet 31 is preferably arranged such that the water is discharged from the pump 100 in a substantially tangential manner.
  • the axis of the inlet 30 preferably corresponds with the axis of rotation 4b of the impeller 4, whereas the outlet 31 comprises an axis in a different plan than the axis of the inlet 30, the outlet 31 preferably being arranged such that the water is discharged from the pump 100 in a substantially tangential manner.
  • the water enters through the inlet 30, and exits through the outlet 31 driven by the impeller 4.
  • the water can enter the pump 100 being mixed with air.
  • a circulation of air bubbles is generated in the hydraulic chamber 6, and these bubbles cannot always be correctly discharged from the pump 100, forming a type of circulation tube in the hydraulic chamber 6 that significantly reduces the efficiency of the pump 100 and in some cases can even cause the pump 100 to be incapable of discharging the water it received.
  • the pump 100 further comprises a stationary element 5 which is adapted for aiding in discharging the water circulating in the hydraulic chamber 6 from the pump 100 through the outlet passage 31, so that the pump 100 is capable of discharging the water even when it is mixed with air.
  • the stationary element 5 is attached to at least one of the elements demarcating the hydraulic chamber 3, i.e., to the hydraulic body 3, or to one of the elements forming the closure means, or it can even be integrated in said element, being part of it.
  • the stationary element 5 is integrated in the hydraulic body 3, being part of the hydraulic body 3, as can be seen in Figure 3 .
  • the stationary element 5 could be attached to the hydraulic body without being integrated in it, or it could even be attached to (or integrated in) the cover 7 or it could be attached to the sealing element 8 (or integrated in the sealing element 8).
  • the stationary element 5 is arranged in the hydraulic chamber 6 such that it blocks or resists against the flow of the water when said water is circulating in the hydraulic chamber 6, and extends at least partially along the width of the hydraulic chamber 6, although it could also extend along the entire width of the hydraulic chamber 6.
  • turbulences are generated, said turbulences channeling the air that may be introduced in the hydraulic chamber 6 in a simple and natural manner out the pump 100, without having to additionally incorporate additional parts or elements for bearing the stationary element, and without the normal operation of the pump 100 (without the presence of air) being significantly affected.
  • the stationary element 5 acts like a wall for the water, blocking or resisting against its flow, generating a difference in pressures between two adjacent zones of the hydraulic chamber 6, each of the two zones corresponding with a zone on each side of the stationary element 5.
  • the difference in pressure between both zones next to the stationary element 5 creates a zone with kinetic turbulence energy or favors turbulent flow, which in turn favors the rapid transition of air towards the outlet 31 through which it is discharged from the pump 100, the pump 100 significantly maintaining its efficiency even in response to the presence of air inside it (in the hydraulic chamber 6).
  • the stationary element 5 comprises a corresponding side surface 51 and 52 facing each side zone between which the difference in pressure is generated, and both side surfaces 51 and 52 can be parallel straight surfaces, as shown by way of example in Figure 4 , wedge-shaped straight surfaces or even inverted wedge-shaped straight surfaces.
  • the stationary element 5 is arranged in the zone of the hydraulic chamber 6 closest to the outlet 31, and particularly after the outlet 31 in relation to the direction of the flow of the fluid.
  • the stationary element 5 can be arranged in other positions inside the hydraulic chamber 6, but its efficiency drops as it moves away from this preferred position.
  • the stationary element 5 can be attached at a first end to a wall of the corresponding element delimiting the hydraulic chamber 6, as occurs in the preferred embodiment where said element further corresponds with the hydraulic body 3. Said wall corresponds with the wall farthest from the impeller 4 delimiting the hydraulic chamber 6, and the stationary element 5 extends towards the inside of the hydraulic chamber 6 to block or resist against the flow of water.
  • the second end of the stationary element 5 opposite the first end is the point of the stationary element 5 closest to the impeller 4.
  • the stationary element 5 can extend inwardly into the radial hydraulic chamber 6 with respect to the axis of rotation 4b of the impeller 4, but it does not necessarily have to. In fact, in the preferred embodiment this does not occur, as shown by way of example in Figure 3 , for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP13382453.2A 2012-11-12 2013-11-11 Für ein Haushaltsgerät angepasste Flüssigkeitszirkulationspumpe Withdrawn EP2730788A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201231732A ES2460369B1 (es) 2012-11-12 2012-11-12 Bomba de circulación de fluido adaptada para un aparato electrodoméstico

Publications (2)

Publication Number Publication Date
EP2730788A2 true EP2730788A2 (de) 2014-05-14
EP2730788A3 EP2730788A3 (de) 2014-09-24

Family

ID=49641703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13382453.2A Withdrawn EP2730788A3 (de) 2012-11-12 2013-11-11 Für ein Haushaltsgerät angepasste Flüssigkeitszirkulationspumpe

Country Status (3)

Country Link
US (1) US20140134021A1 (de)
EP (1) EP2730788A3 (de)
ES (1) ES2460369B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194300A1 (de) * 2016-05-10 2017-11-16 BSH Hausgeräte GmbH Flüssigkeitsheizpumpe zum fördern und aufheizen von flüssigkeit in einem wasserführenden haushaltsgerät
WO2019010850A1 (zh) * 2017-07-14 2019-01-17 青岛海尔洗碗机有限公司 一种洗碗机洗涤泵及洗碗机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451139A (en) 1992-01-24 1995-09-19 Ebara Corporation Self priming centrifugal
US20120224957A1 (en) 2011-03-04 2012-09-06 E.G.O. Elektro-Geratebau Gmbh Pump and Flow-Guiding Device
US20120224961A1 (en) 2011-03-04 2012-09-06 E.G.O. Elektro-Geratebau Gmbh Pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941474A (en) * 1956-08-20 1960-06-21 Fairbanks Morse & Co Self-priming pumping apparatus
US3967915A (en) * 1975-01-27 1976-07-06 Litzenberg David P Centrifugal pump
IT1225597B (it) * 1988-09-26 1990-11-22 Calpeda A Spa Pompa autoadescante ad eiettore con corona direttrice assiale.
IT1234116B (it) * 1989-06-07 1992-04-29 Novax S R L Pompa centrifuga autoadescante.
ITTO20040592A1 (it) * 2004-09-08 2004-12-08 Plaset Spa Chiocciola per una pompa centrifuga
DE102007017271A1 (de) * 2007-04-12 2008-10-16 BSH Bosch und Siemens Hausgeräte GmbH Pumpe mit Heizeinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451139A (en) 1992-01-24 1995-09-19 Ebara Corporation Self priming centrifugal
US20120224957A1 (en) 2011-03-04 2012-09-06 E.G.O. Elektro-Geratebau Gmbh Pump and Flow-Guiding Device
US20120224961A1 (en) 2011-03-04 2012-09-06 E.G.O. Elektro-Geratebau Gmbh Pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194300A1 (de) * 2016-05-10 2017-11-16 BSH Hausgeräte GmbH Flüssigkeitsheizpumpe zum fördern und aufheizen von flüssigkeit in einem wasserführenden haushaltsgerät
CN109154308A (zh) * 2016-05-10 2019-01-04 Bsh家用电器有限公司 用于输送和加热在导水的家用电器中的流体的流体热泵
WO2019010850A1 (zh) * 2017-07-14 2019-01-17 青岛海尔洗碗机有限公司 一种洗碗机洗涤泵及洗碗机

Also Published As

Publication number Publication date
EP2730788A3 (de) 2014-09-24
ES2460369A1 (es) 2014-05-13
ES2460369B1 (es) 2015-03-02
US20140134021A1 (en) 2014-05-15

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