EP2221485B1 - Flüssigkeitsumwälzpumpe passend für ein Haushaltsgerät - Google Patents

Flüssigkeitsumwälzpumpe passend für ein Haushaltsgerät Download PDF

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Publication number
EP2221485B1
EP2221485B1 EP10382013.0A EP10382013A EP2221485B1 EP 2221485 B1 EP2221485 B1 EP 2221485B1 EP 10382013 A EP10382013 A EP 10382013A EP 2221485 B1 EP2221485 B1 EP 2221485B1
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EP
European Patent Office
Prior art keywords
circulation pump
heating device
capsule
pump according
hydraulic body
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
EP10382013.0A
Other languages
English (en)
French (fr)
Other versions
EP2221485A2 (de
EP2221485A3 (de
Inventor
Javier Valentín Errasti Uriarte
Rodrigo Orue Orue
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.)
Copreci SCL
Original Assignee
Copreci SCL
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Publication date
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Publication of EP2221485A2 publication Critical patent/EP2221485A2/de
Publication of EP2221485A3 publication Critical patent/EP2221485A3/de
Application granted granted Critical
Publication of EP2221485B1 publication Critical patent/EP2221485B1/de
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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
    • 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
    • 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
    • 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 
    • D06F39/04—Heating arrangements
    • 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
    • F04D29/40—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
    • F04D29/44—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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • This invention relates to a fluid circulation pump adapted to a household appliance, such as a washing machine or a dishwasher, and which comprises a built-in heating device.
  • Known fluid circulation pumps that include heating devices built into said circulation pumps.
  • Known circulation pumps comprise a motor that is assembled on a motor body, a hydraulic body that is fixed to the motor body and which comprises a water inlet pipe and a water outlet pipe, an impeller operated by the motor, which is housed inside the hydraulic body, and a heating device that heats the water entering the fluid circulation pump.
  • the hydraulic body which is substantially cylindrical, has a first part through which water enters in its interior and a second part that is fixed to the motor body.
  • the heating device is ring-shaped and forms part of the cylindrical wall of the hydraulic body, said heating device being fixed to one end of the first part and to one end of the second part of the hydraulic body.
  • Document GB 2427437 A describes a circulation pump in which the heating device is arranged on one end of the hydraulic body with the result that, at least partially, it closes the opening of said hydraulic body, with the heating device comprising a thick-film resistor plate in direct contact with the pumped water.
  • the circulation pump comprises a pump housing wherein the impeller is housed, said pump housing being made of a pump housing cover and of a pump housing base, and heating elements arranged on the outer surface of the pump housing cover.
  • the object of the invention is to provide a fluid circulation pump adapted to a household appliance, such as a washing machine or a dishwasher, as defined in the claims.
  • the circulation pump comprises a motor that is attached to a motor body, a hydraulic body that is fixed to the motor body and which comprises a water inlet pipe and a water outlet pipe, an impeller operated by the motor and which is housed, at least partially, inside the hydraulic body, and a heating device for the water entering the fluid circulation pump comprising at least one heating element and a conducting element in thermal contact with the heating element.
  • the heating device is arranged inserted inside the hydraulic body,. supported on a bottom of the hydraulic body, inserted between an outer wall and a ring-shaped projection inside said hydraulic body thereby simplifying the assembly, as said heating device is separated from the motor body.
  • the fluid circulation pump further comprises tight fixing means of the heating device to the hydraulic body.
  • the heating device further comprising a conducting element in thermal contact with the heating element, the heating element being arranged facing the bottom of the hydraulic body.
  • the circulation pump comprises a capsule that is connected to the motor body, and which delimits, along with the heating device, an impeller chamber, the impeller being housed at least partially in the impeller chamber.
  • the fluid circulation pump 1 adapted to a household appliance such as a washing machine or a dishwasher, comprises a motor body 15 in which is assembled a synchronous electric motor 2 that comprises a stator 3 that is fixed to the outside of the motor body 15 and a permanent-magnet rotor 4 that is housed in a rotor chamber 11 of the motor body 15, said rotor 4 being attached to a drive shaft 9, an impeller 6 connected to the drive shaft 9, a substantially cylindrical and hollow hydraulic body 10, inside which is housed the impeller 6, and a heating device 8, housed inside the hydraulic body 10, which heats the water entering the fluid circulation pump 1.
  • a synchronous electric motor 2 that comprises a stator 3 that is fixed to the outside of the motor body 15 and a permanent-magnet rotor 4 that is housed in a rotor chamber 11 of the motor body 15, said rotor 4 being attached to a drive shaft 9, an impeller 6 connected to the drive shaft 9, a substantially cylindrical and hollow hydraulic body 10, inside which is housed the impeller 6, and a heating device 8, house
  • the fluid circulation pump 1 comprises a substantially cylindrical and hollow capsule 12, which has a first part 12a that is attached tightly inside the motor body 15 and a second part 12b, coaxial and continuous to said first part 12a, which is housed inside the hydraulic body 10.
  • the capsule 12 delimits, along with the heating device 8, an impeller chamber 13 inside of which the impeller 6 is housed at least partially, with said capsule 12 separating the impeller chamber 13 from the rotor chamber 11 of the motor body 15.
  • the hydraulic body 10 comprises an inlet pipe 11b through which water enters the impeller chamber 13, and an outlet pipe 11c through which the heated water exits the impeller chamber 13. Furthermore, the hydraulic body 10 is fixed to the motor body 15 through known fixing means such as bayonet clips or fasteners, a seal 25 being arranged between said hydraulic body 10 and the motor body 15.
  • the heating device 8 comprises at least one heating element 22, and a conducting element 23 in thermal contact with the heating element 22.
  • the conducting element 23 is substantially flat, disc shaped, and is made of a heat-conducting material, mainly metallic, the conducting element 23 being fixed to the heating element 22 through known manufacturing methods.
  • the heating element 22 is arranged substantially orthogonal to the impeller 6 and includes a central hole 23b that is partially passed through by said impeller 6.
  • the heating element 22 comprises a thick-film resistor that is deposited on the conducting element 23 by means of known techniques such as silkscreening.
  • the heating element 22 may comprise a tubular resistor.
  • the hydraulic body 10 comprises a cylindrical outer wall 10b and a cylindrical ring-shaped projection 10c that extends axially in the interior, concentric to the outer wall 10b, from a bottom 10a of said hydraulic body 10.
  • the heating device 8 is tightly inserted inside of the hydraulic body 10, between the outer wall 10b and the ring-shaped projection 10c, and supported on the bottom 10a, the heating element 22 being arranged facing said bottom 10a.
  • the fluid circulation pump 1 comprises an inner insulating ring 17 that fits between the hole 23b of the conducting element 23 and the ring-shaped projection 10c of the hydraulic body 10, and an outer insulating ring 18 that fits between the outer wall 10b of the hydraulic body 10 and the outer perimeter of the conducting element 23, thereby preventing the water entering the fluid circulation pump 1 from coming into contact with the heating element 22.
  • the heating element 22 has a maximum surface that allows it to be inserted in the inside of the hydraulic body 10 so that the water that enters through the inlet pipe 11b and is forced towards the impeller chamber 13 by the impeller 6 is heated rapidly.
  • the water housed in the impeller chamber 13 is thus able to rapidly absorb the heat transferred by the conducting element 23 and is hot when it exits through the outlet pipe 11c towards a corresponding washing chamber not shown in the figures, thereby preventing said water from boiling and the heating element 22 from overheating.
  • the heat exchange that takes place in the impeller chamber 13 may be altered by modifying the hydraulic characteristics of the fluid circulation pump 1 and/or by modifying the heat transmission surface of the heating device 8.
  • the hydraulic characteristics of the fluid circulation pump 1 are determined by the dimensions and/or the shape of the impeller chamber 13, with the result that by modifying the shape and/or the dimensions of the capsule 12 fluid circulation pumps 1 of different hydraulic characteristics and adapted to the specific needs of each application may be obtained. As a result, fluid circulation pumps of different hydraulic characteristics may be obtained merely by changing the capsule 12.
  • the capsule 12 therefore comprises a ring-shaped rib 40, concentric to the capsule 12, which extends axially, from a bottom surface 12c of said capsule 12, to the inside of the impeller chamber 13.
  • the ring-shaped rib 40 changes the shape of the impeller chamber 13 and, therefore, the hydraulic characteristics of the fluid circulation pump 1.
  • the capsule may include other elements that modify its shape.
  • Figure 3 shows a third embodiment of the invention in which the effectiveness of the heat exchange between the pumped water and the heating device 8 is improved by modifying the hydraulic characteristics of the fluid circulation pump 1 and the heat transmission surface of the heating device 8.
  • the capsule 12 comprises an auxiliary conducting element 31 that is fixed inside the free end of the second part 12b of said capsule 12, with the ring-shaped auxiliary conducting element 31, which comprises a substantially C-shaped cross-section and is made of a heat-conducting material, being mainly metallic.
  • Said auxiliary conducting element 31 modifies the hydraulic characteristics of the fluid circulation pump 1 insofar as the shape of the impeller chamber 13 is changed, and also comes into contact with the conducting element 23 of the heating device 8, thereby increasing the heat exchange surface.
  • the hydraulic body 10 and the capsule 12 are made of a plastic material, which allows a light and economical fluid circulation pump 1 to be obtained.
  • the capsule 12 is also an interchangeable part, with the result that in order to obtain different fluid circulation pumps with the necessary hydraulic characteristics all that is required is to exchange said capsule 12.
  • the motor 2 may also be of any type known in the prior art and used in circulation pumps.
  • said circulation pump 1 may include safety switches that prevent the water exiting the impeller chamber 13 from doing so at an excessively high temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (12)

  1. Flüssigkeitsumwälzpumpe, passend für ein Haushaltsgerät, insbesondere eine Waschmaschine oder einen Geschirrspüler, umfassend einen Motorkörper (15), einen an dem Motorkörper (15) angebrachten Motor (2), einen an dem Motorkörper (15) befestigten Hydraulikkörper (10), bestehend aus einem Wassereintrittsrohr (11b) und einem Wasseraustrittsrohr (11c), ein zumindest teilweise im Inneren des Hydraulikkörpers (10) angeordnetes, durch den Motor (2) angetriebenes Laufrad (6), eine im Inneren des Hydraulikkörpers (10) eingefügt angeordnete Heizvorrichtung (8) für das in die Flüssigkeitsumwälzpumpe (1) eintretende Wasser, wobei die genannte Heizvorrichtung (8) mindestens ein Heizelement (22) umfasst, und eine an dem Motorkörper (15) befestigte Hülle (12), dadurch gekennzeichnet, dass die Heizvorrichtung (8) auf dem unteren Teil (10a) des Hydraulikkörpers (10) aufliegend angeordnet und zwischen einer Außenwand (10b) und einem ringförmigen Ansatz (10c) im Inneren des genannten Hydraulikkörpers (10) eingefügt ist, und dass die Flüssigkeitsumwälzpumpe Mittel zur dichten Befestigung der Heizvorrichtung (8) an dem Hydraulikkörper (10) aufweist, wobei die Heizvorrichtung (8) ferner ein Leiterelement (23) in thermischem Kontakt mit dem Heizelement (22) aufweist, wobei das Heizelement (22) dem unteren Teil (10a) des Hydraulikkörpers (10) zugewandt angeordnet ist, wobei die Hülle (12) zusammen mit der Heizvorrichtung (8) eine Laufradkammer (13) begrenzt, wobei das Laufrad (6) zumindest teilweise in der Laufradkammer (13) untergebracht ist.
  2. Umwälzpumpe nach dem vorstehenden Anspruch, wobei die Hülle (12) austauschbar ist.
  3. Umwälzpumpe nach einem der vorstehenden Ansprüche, wobei die Heizvorrichtung (8) eine Scheibenform hat und im Wesentlichen senkrecht zum Laufrad (6) angeordnet ist.
  4. Flüssigkeitsumwälzpumpe nach Anspruch 1, wobei die Dichtbefestigungsmittel einen äußeren Isolierring (18), der die Heizvorrichtung (8) dicht an der Außenwand (10b) befestigt, und einen inneren Isolierring (17), der die Heizvorrichtung (8) dicht an dem ringförmigen Ansatz (10c) befestigt, umfassen.
  5. Umwälzpumpe nach einem der vorstehenden Ansprüche, wobei die Hülle (12) mindestens einen sich zur Innenseite der Laufradkammer (13) erstreckenden Steg (40) aufweist.
  6. Umwälzpumpe nach dem vorstehenden Anspruch, wobei der Steg (40) ein im Wesentlichen konzentrisch zur Hülle (12) verlaufender ringförmiger Steg ist.
  7. Umwälzpumpe nach einem der vorstehenden Ansprüche, wobei die Hülle (12) mindestens ein im Inneren der genannten Hülle (12) befestigtes Hilfsleiterelement (31) aufweist.
  8. Umwälzpumpe nach dem vorstehenden Anspruch, wobei das Hilfsleiterelement (31) in Kontakt mit dem Leiterelement (23) der Heizvorrichtung (8) angeordnet ist.
  9. Umwälzpumpe nach einem der Ansprüche 7 oder 8, wobei das Hilfsleiterelement (31) ein Metallring ist.
  10. Umwälzpumpe nach einem der vorstehenden Ansprüche, wobei das Heizelement (22) mindestens einen auf dem Leiterelement (23) aufgebrachten Dickschichtwiderstand aufweist.
  11. Umwälzpumpe nach einem der Ansprüche 1 bis 9, wobei das Heizelement (22) mindestens einen röhrenförmigen Widerstand aufweist.
  12. Umwälzpumpe nach einem der vorstehenden Ansprüche, wobei der Hydraulikkörper (10) und die Hülle (12) aus einem Kunststoffmaterial bestehen.
EP10382013.0A 2009-01-26 2010-01-25 Flüssigkeitsumwälzpumpe passend für ein Haushaltsgerät Active EP2221485B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200900203A ES2351271B1 (es) 2009-01-26 2009-01-26 Bomba de circulación de fluido adaptada a un aparato electrodoméstico.

Publications (3)

Publication Number Publication Date
EP2221485A2 EP2221485A2 (de) 2010-08-25
EP2221485A3 EP2221485A3 (de) 2016-12-21
EP2221485B1 true EP2221485B1 (de) 2021-03-10

Family

ID=42331041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10382013.0A Active EP2221485B1 (de) 2009-01-26 2010-01-25 Flüssigkeitsumwälzpumpe passend für ein Haushaltsgerät

Country Status (2)

Country Link
EP (1) EP2221485B1 (de)
ES (2) ES2351271B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010043727A1 (de) * 2010-11-10 2012-05-10 E.G.O. Elektro-Gerätebau GmbH Pumpe
CN102748329B (zh) 2011-04-15 2017-02-22 德昌电机(深圳)有限公司 加热泵
DE102011079510B4 (de) * 2011-07-20 2016-11-24 E.G.O. Elektro-Gerätebau GmbH Pumpe
DE102012202491B3 (de) 2012-02-17 2013-08-08 E.G.O. Elektro-Gerätebau GmbH Leitrad für eine Impellerpumpe und Impellerpumpe
WO2015145386A1 (en) * 2014-03-26 2015-10-01 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Centrifugal pump for household appliances
CN104712584B (zh) * 2014-03-28 2017-07-04 美的集团股份有限公司 洗涤泵及洗碗机
CN108518359A (zh) * 2014-04-24 2018-09-11 佛山市顺德区美的洗涤电器制造有限公司 用于洗碗机的加热泵和洗碗机
AU2015304207B2 (en) * 2014-08-22 2018-03-22 Lg Electronics Inc. Pump and dishwasher including the same
DE102014222050B3 (de) * 2014-10-29 2016-03-31 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Laugenpumpe
CN109209912B (zh) * 2018-09-28 2021-01-01 佛山市威灵洗涤电机制造有限公司 电泵及洗碗机
EP4130488A1 (de) * 2021-08-03 2023-02-08 Bleckmann GmbH & Co. KG Druckwand für eine flüssigkeitspumpe und pumpe mit der druckwand

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DE19736794C2 (de) * 1997-08-23 2000-04-06 Whirlpool Co Geschirrspülmaschine mit unterem und oberem Sprüharm und einer Umwälzpumpe
DE19858137B4 (de) 1998-12-16 2016-12-15 BSH Hausgeräte GmbH Heizung zum Erwärmen der Spülflüssigkeit in einer Geschirrspülmaschine
DE29825044U1 (de) * 1998-12-16 2004-07-15 BSH Bosch und Siemens Hausgeräte GmbH Heizung zum Erwärmen der Spülflüssigkeit in einer Geschirrspülmaschine
DE50109139D1 (de) 2000-10-25 2006-05-04 Eichenauer Heizelemente Gmbh Pumpe mit einem beheizbaren Gehäuse
DE10133130A1 (de) * 2001-07-07 2003-01-16 Miele & Cie Umwälzpumpe mit/ohne Heizungseinrichtung
ES2290659T3 (es) * 2004-05-12 2008-02-16 Askoll Holding S.R.L. Bomba de circulacion de fluido con motor sincronico, equipada con medios de calentamiento del fluido, en particular para lavadoras.
GB2427437B8 (en) 2005-06-23 2011-08-24 Otter Controls Ltd Combined heater pump apparatus
DE102006028913A1 (de) * 2006-06-21 2007-12-27 Aweco Appliance Systems Gmbh & Co. Kg Pumpe, insbesondere für wasserführende Haushaltsmaschinen

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Also Published As

Publication number Publication date
ES2351271A1 (es) 2011-02-02
ES2855153T3 (es) 2021-09-23
EP2221485A2 (de) 2010-08-25
ES2351271B1 (es) 2011-11-15
EP2221485A3 (de) 2016-12-21

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