EP1643135A2 - Pompe à liquide - Google Patents

Pompe à liquide Download PDF

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Publication number
EP1643135A2
EP1643135A2 EP05021253A EP05021253A EP1643135A2 EP 1643135 A2 EP1643135 A2 EP 1643135A2 EP 05021253 A EP05021253 A EP 05021253A EP 05021253 A EP05021253 A EP 05021253A EP 1643135 A2 EP1643135 A2 EP 1643135A2
Authority
EP
European Patent Office
Prior art keywords
pump
chamber
rotor chamber
rotor
pump according
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Withdrawn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
EP05021253A
Other languages
German (de)
English (en)
Inventor
Kurt Wallerstorfer
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.)
Aweco Appliance Systems GmbH and Co KG
Original Assignee
Aweco Appliance Systems GmbH and Co KG
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 Aweco Appliance Systems GmbH and Co KG filed Critical Aweco Appliance Systems GmbH and Co KG
Publication of EP1643135A2 publication Critical patent/EP1643135A2/fr
Withdrawn legal-status Critical Current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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine

Definitions

  • the invention relates to a liquid pump according to the preamble of claim 1.
  • Liquid pumps in particular for domestic appliances, dishwashers, washing machines or the like, are already commercially available in so-called wet-rotor versions.
  • the rotor of the motor is housed in a rotor chamber whose housing wall separates the stator liquid-tight from the rotor.
  • the rotor chamber is in this case liquid-permeable connected to the pump chamber within the pump housing, so that a liquid or water exchange takes place.
  • the housing of the rotor chamber is often referred to as a can, because it extends through the annular gap between the rotor and stator.
  • the object of the invention is in contrast to propose a liquid pump which avoids the disadvantages mentioned above while maintaining the advantages of a wet rotor or at least reduced.
  • a liquid pump according to the invention is characterized in that a heat-conducting partition between the pump chamber and the rotor chamber is provided.
  • an at least temporarily liquid-tight partition between the pump chamber and the rotor chamber is provided. This leads at least in the closed time intervals to a complete decoupling of the rotor chamber from the pump chamber and thus from the liquid circuit during operation of the pump. Contamination via the liquid circuit is therefore completely excluded on the rotor chamber side.
  • the advantages of the wet rotor, ie a good cooling of the engine and the use of waste heat is ensured by the heat-conducting formation of the partition.
  • a surface-enlarging structure for the partition wall is preferably provided.
  • Such a surface-enlarging structure could be obtained, for example, by appropriate shaping, i. in the form of grooves, zig-zag profiles or the like.
  • the attachment of ribs or the like in the region of the transition point between the rotor chamber and pump chamber would be conceivable.
  • theressbehellung the rotor chamber is provided during commissioning of the pump.
  • the partition is preferably a passage provided in the partition through which this filling is to be made.
  • a valve for the rotor chamber is provided to allow the filling of the rotor chamber and at the same time a liquid-tight seal between the rotor chamber and the pump chamber during operation.
  • Such a valve can open a passage for purposes of filling and reseal during operation.
  • vent valve for the rotor chamber to allow filling, e.g. during initial start-up or to facilitate unwanted emptying of the rotor chamber.
  • a vent valve cooperate with a correspondingly small and suitably arranged open filling opening in such a way that a Nachbow to liquid takes place only with simultaneous removal of air through the vent valve.
  • the filling valve for the rotor chamber is formed in an advantageous embodiment as a float, so that an automatic venting and refilling of the rotor chamber via the pump circuit is possible.
  • a controlled filling of the rotor chamber with liquid, such as water, is provided via the pump circuit.
  • liquid such as water
  • control may depend on various parameters be made.
  • the control for example via an automatic valve or even via a controlled valve can be made.
  • the valve can be formed, for example electromagnetically, mechanically or hydraulically controlled.
  • the filling of the rotor chamber is controlled in a particular embodiment of the invention depending on the presence of air in the rotor chamber.
  • This can be like o.a. for example via an automatic venting valve in communication, e.g. with a float valve, are made in the partition between the rotor chamber and pump chamber without external control.
  • a controlled air-dependent refilling by means of an air sensor e.g. a float, a light barrier or the like would be conceivable.
  • the rotor chamber is filled depending on the temperature.
  • the use of a valve would be possible, for example, includes a thermostat and so when exceeding a threshold temperature in the rotor chamber allows the passage of liquid into the rotor chamber. Accordingly, e.g. due to leaks, the rotor chamber empties, so that sufficient cooling is no longer guaranteed, the temperature rises accordingly there until a filling with liquid via the pump circuit.
  • a temperature-dependent filling would also be conceivable in another embodiment with a temperature sensor and an external control of a corresponding filling valve.
  • a filling of the rotor chamber is provided depending on the direction of rotation of the drive motor.
  • the axial force exerted by a corresponding impeller on the axle could be used to open or close a passage between the pump chamber and the rotor chamber.
  • a corresponding motor control could be provided, which initiates the filling of the rotor chamber depending on corresponding state parameters.
  • the axial force can be e.g. produce by a corresponding angular position of the wings of the impeller.
  • the filling of the rotor chamber can also be made time-dependent, i. it may be provided at certain time intervals, an opening of the passage between the rotor chamber and the pump chamber to ensure that the rotor chamber is always sufficiently filled with liquid.
  • Essential to the invention is compared to the usual wet-running pumps the fact that at least partially the required heat transfer between the rotor chamber and pump chamber on the heat-conducting function of the partition is accomplished and thus the fluid exchange between the pump chamber and rotor chamber can be reduced or avoided altogether.
  • FIG. 1 schematically shows a liquid pump or a so-called "wet rotor” for a dishwasher with an inlet 10 and a drain 11.
  • the wet rotor has a pump housing 1, in which a pump chamber 2 is provided with a pump impeller 3, and a motor 4 with a rotor 5 and a stator 6.
  • the stator 6 is separated from a rotor chamber 8 by means of a wall 7.
  • a heat-conducting partition wall 9, in particular a metal wall 9 is provided between the pump chamber 2 and the rotor chamber 8.
  • heat of the rotor chamber 8 or a fluid provided in this, in particular cooling liquid in an advantageous manner in the pump chamber 2 and in a pumping fluid, in particular water, are derived.
  • a cooling of the motor 4 is realized according to the invention, without possibly polluted pumping fluid or washing water can get into the rotor chamber 8.
  • FIG. 2 shows a variant with a float 12 for venting the rotor chamber 8.
  • the drain 11 is arranged at the top in the vertical direction.
  • the float 12 comprises an opening through which any gas present in the rotor chamber 8, in particular air, can escape.
  • the partition wall 9 or the pump housing 1 may comprise the opening of the float 12 in an advantageous manner.
  • FIG. 3 shows a variant with a direction-dependent flushing of the rotor chamber 8.
  • the partition wall 9 at least one valve 13 with openings which can be opened or closed by means of a lever mechanism 14.
  • the mechanism 14 includes a spring.
  • the closing or opening of the valve 13 is achieved by changing the direction of rotation of the motor 4 in that the impeller 3 generates an axially aligned force by an advantageous embodiment of the blades.
  • This force in turn causes a relative movement 15 between the partition 9 and rotor 5, so that the volume of the rotor chamber 8 and the pressure in this changes.
  • the mechanism 13 opens or closes the openings of the partition wall 9. When the opening is open, an advantageous replacement of the fluid of the rotor chamber 8 can take place.
  • the variant of Figure 4 also has a direction-dependent flushing.
  • the partition wall 9 at least a comparatively large opening 16 which can be opened or closed by means of a paddle 17 or the like.
  • the paddle 17 is adjusted in a first or in a second position due to the present in the rotor chamber 8 flow of the fluid.
  • FIG. 4b a section in the region of the paddle 17 is shown schematically in the cutout.
  • the opening 16 In the first position (solid line) the opening 16 is open.
  • the opening 16 In the second position (hatching), the opening 16 is closed by the paddle 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP05021253A 2004-10-04 2005-09-29 Pompe à liquide Withdrawn EP1643135A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004048557A DE102004048557A1 (de) 2004-10-04 2004-10-04 Flüssigkeitspumpe

Publications (1)

Publication Number Publication Date
EP1643135A2 true EP1643135A2 (fr) 2006-04-05

Family

ID=35079130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05021253A Withdrawn EP1643135A2 (fr) 2004-10-04 2005-09-29 Pompe à liquide

Country Status (3)

Country Link
US (1) US20060093502A1 (fr)
EP (1) EP1643135A2 (fr)
DE (1) DE102004048557A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI363141B (en) * 2006-01-11 2012-05-01 Delta Electronics Inc Water pump and bearing thereof
EP2091133B1 (fr) * 2008-02-13 2012-08-15 Askoll Holding S.r.l. Moteur électrique et pompe électrique
DE102011121149A1 (de) * 2011-12-15 2013-06-20 Wilo Se Nassläuferpumpe mit Vorkammer
DE102012206189A1 (de) * 2012-04-16 2013-10-17 Robert Bosch Gmbh Elektrische Maschine und Verfahren zum Betreiben einer elektrischen Maschine
DE102014109625A1 (de) * 2014-07-09 2016-01-14 Hanning Elektro-Werke Gmbh & Co. Kg Pumpenanordnung
DE102017112890A1 (de) * 2017-06-12 2018-12-13 Hanning Elektro-Werke Gmbh & Co. Kg Pumpenanordnung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395644A (en) * 1966-06-16 1968-08-06 Sta Rite Products Inc Motor pump unit
DE2639541A1 (de) * 1976-09-02 1978-03-09 Grundfos As Umwaelzpumpe fuer insbesondere heizungs- und brauchwasseranlagen
FR2508563B1 (fr) * 1981-06-26 1985-11-08 Electro Hydraulique Seh Motopompe a moteur electrique a rotor noye
DE3220448C1 (de) * 1982-05-29 1983-08-11 Grundfos A/S, 8850 Bjerringbro Pumpenaggregat fuer Heizungs- und Brauchwasseranlagen
DE3843477A1 (de) * 1988-12-23 1990-06-28 Oplaender Wilo Werk Gmbh Spaltrohr-elektromotor
DE9302945U1 (de) * 1993-03-01 1993-11-11 Hanning Elektro-Werke GmbH & Co, 33813 Oerlinghausen Mit einer Anlaufhilfe ausgestatteter Synchronmotor
KR100198399B1 (ko) * 1996-11-29 1999-06-15 전주범 온수순환펌프용 수중회전 로터구조
DE19721196A1 (de) * 1997-05-21 1998-11-26 Klein Schanzlin & Becker Ag Maschinenaggregat mit integrierter Wärmesperre
DE19914581A1 (de) * 1999-03-31 2000-10-12 Grundfos A S Bjerringbro Kreiselpumpenaggregat

Also Published As

Publication number Publication date
DE102004048557A1 (de) 2006-04-06
US20060093502A1 (en) 2006-05-04

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