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EP0076739A1 - Gerät zum Pumpen einer Flüssigkeit und Maschine, versehen mit einem solchen Gerät - Google Patents

Gerät zum Pumpen einer Flüssigkeit und Maschine, versehen mit einem solchen Gerät Download PDF

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Publication number
EP0076739A1
EP0076739A1 EP82401757A EP82401757A EP0076739A1 EP 0076739 A1 EP0076739 A1 EP 0076739A1 EP 82401757 A EP82401757 A EP 82401757A EP 82401757 A EP82401757 A EP 82401757A EP 0076739 A1 EP0076739 A1 EP 0076739A1
Authority
EP
European Patent Office
Prior art keywords
pump
wheel
air
chimney
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.)
Granted
Application number
EP82401757A
Other languages
English (en)
French (fr)
Other versions
EP0076739B1 (de
Inventor
Camille Barbier
Laurent Didier
Didier Viaud
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.)
Esswein SA
Original Assignee
Esswein SA
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 Esswein SA filed Critical Esswein SA
Priority to AT82401757T priority Critical patent/ATE13628T1/de
Publication of EP0076739A1 publication Critical patent/EP0076739A1/de
Application granted granted Critical
Publication of EP0076739B1 publication Critical patent/EP0076739B1/de
Expired 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/185—Rotors consisting of a plurality of wheels
    • 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
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • 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
    • A47L15/4202—Water filter means or strainers
    • A47L15/4206—Tubular filters

Definitions

  • the present invention relates to a liquid pumping device and an apparatus such as a dishwasher provided with this pumping device.
  • An appliance such as a dishwasher usually has operating cycles which include different stages of treatment and corresponding baths. The end of each phase is often characterized by draining the water from the device.
  • the device's liquid pumping device thus comprises two pumps, a cycling pump giving energy to the water which exerts a mechanical action on the dishes and a drain pump. Most often, these pumps are driven by independent motors.
  • the pumping device comprises a single motor which on the other hand has two directions of rotation and on the shaft of which these two pumps are mounted or two stages of pumps one of which is intended for draining and the other is for cycling.
  • the cycling pump rotates in a predicted direction and the operation of the dishwasher is silent.
  • this cycling pump rotates in the opposite direction and the operation of the dishwasher becomes noisy.
  • a known solution consists in providing the latter with an air intake chimney which makes it possible to bring induced air at a point on the periphery of the turbine. the pump when this turbine rotates in the opposite direction to the direction of rotation during its cycling operation.
  • This air intake allows the pump to slowly prime.
  • this defusing turns out to be too long and the part of the water which still remains in the pump is subject to chopping by the turbine blades. This results in an unpleasant noise during this long defusing.
  • the present invention aims to avoid this drawback, allows for a liquid pumping device, economical, and silent regardless of the direction of rotation of its drive motor and an apparatus such as a dishwasher provided of such a pumping device.
  • a liquid pumping device having at least one centrifugal type pump driven by a motor with two directions of rotation, comprises, in this centrifugal pump on the one hand a wheel having main vanes oriented radially in one direction predetermined and axially delimited by at least one end flange, and auxiliary vanes produced on the external surface of this flange, and oriented radially in a direction opposite to that of these main blades, and on the other hand a intake chimney air coaxial with the pump impeller and having a first end, in communication with the interior of the body of this pump and being located near the auxiliary vanes of this impeller, and a second end emerging above the maximum level of liquid to be pumped, and open to air.
  • a dishwasher 1 produced according to the invention and illustrated in FIGS. 1 and 2 comprises, on the outside, a bodywork 2, and on the inside, a tank 3 in which dish baskets 4 and 5 are mainly mounted, spray reels 6 and 7 and a pumping device 8.
  • the pumping device 8 comprises at least one pump 9 intended for the cycling of the water which consists in sucking water 10 accumulated in the bottom of the tank 3 and in discharging it into the spraying reels 6 and 7.
  • the pumping device 8 further comprises a pump 11 intended for emptying the dishwasher 1, in other words the evacuation of water 10, and a motor 12 with two directions of rotation ensuring a drive of these two pumps whose wheels are fixed on a common shaft 13.
  • the pump 9 is a centrifugal type pump.
  • This pump 9 comprises a body 14, a wheel 15, an intake manifold 16, a discharge line 17 extended by hydraulic circuits from the dishwasher 1 to the spraying reels 6 and 7, and according to an important characteristic. of the invention, an air intake chimney 18, coaxial with the axis of rotation of the wheel 15 and having a first end in communication with the interior of the body 14 and a second end 19 emerging above the level maximum 20 of water in tank 3 and open to air.
  • the wheel 15 comprises (FIG. 2) on the one hand main vanes 21 shown in broken lines in FIG.
  • auxiliary vanes 24 produced on the external surface of one 22 of these flanges and oriented radially in a direction opposite to that of the main vanes 21.
  • the impeller 15 is mounted with its auxiliary vanes 24 facing the air intake chimney 18.
  • the pump 11 is a pump of the vane type which comprises a body 25 (FIG. 4) an intake opening 26 an intake pipe 27, a chamber 28 a vane wheel 29 which is fixed on the same shaft 13 as that of the wheel 15 of the centrifugal pump 9, a discharge pipe 30 and according to an important characteristic of the invention a non-return valve 31.
  • the intake opening 26 of the pump 11 and the intake manifold 16 of the pump 9 open into the same space 32 formed in the bottom of the tank 3 and which is located between the two pumps 9 and 11.
  • the common shaft 13 of the wheels 15 and 29 of the two pumps 9 and 11 is mounted through the space 32 and in alignment with the axis of the air intake chimney 18.
  • the water 10 from the dishwasher descends into the space 32 through a fixed filter 34, the removable well 35 forming an integral part of the filter 34 and the free spaces 33 being free for the passage of water.
  • the wheel 15 of the centrifugal pump 9 rotates in the direction provided for cycling the water 10 and the operation of the pump 9 is silent.
  • the water 10 is sucked into the intake manifold 16 and discharged through the line 17 into the reels 6 and 7.
  • the wheel 29 of the vane pump 11 rotates in a direction opposite to that provided for a emptying the dishwasher 1 while the non-return valve 31 prevents this pump 11 from sucking through its delivery pipe 30, air which can, for example, escape through the shaft passage hole 13 in the pump body 11, enter the space 32, penetrate into the intake manifold 16 of the cycling pump 9 and seriously disrupt the operation of the cycling pump 9. Thanks to its usual structure and despite this wrong direction of rotation, the wheel 29 of the vane pump 11 does not induce more noise than when it turns in a good direction of rotation to perform a drain.
  • the pump 11 When the shaft 13 driven by the motor 12 rotates in the direction of arrow 37, the pump 11 sucks water 10 through its intake opening 26 and its intake pipe 27 and discharges it into its delivery pipe. discharge 30 through its non-return valve 31 which then turns on, to evacuate it towards the outside of the dishwasher while the pump 9 which rotates in a direction opposite to that provided for a cycling of the water 10 , also sucks water through its intake manifold 16 but discharges it into its pipe 17 with low pressure, low flow and normally an intolerable noise.
  • a pumping device 38 comprises, in addition, elements similar to those of the pumping device 8 of the first example and indicated by the same reference numbers, a channel 39 ensuring a connection between the end zone of the air intake chimney 18, which opens into the body 14 of the pump 9, and a hole 40 formed in the periphery of the upper wall of this body 14.
  • This channel 39 allows '' avoid an establishment, in the body 14 of the cycling pump 9, of a permanent air regime which causes difficulty in priming this pump 9, when starting this cycling pump 9, in a dishwasher without water, followed by filling the tank 3 of this dishwasher with water, during the operation of this pump 9.
  • a pumping device 48 comprises, in addition, elements similar to those of the pumping device 8 of the first example (FIG. 2) and indicated by the same reference numbers, a second chimney 49 having a first end in communication with the interior of the body 14 of the pump 9 and a second end or upper end, open outside of this pump 9, that is to say in the tank 3 of the example illustrated in FIG. 6, and at a predetermined level or height, lower than that of the end 19 of the air intake chimney 18.
  • This chosen height of the second chimney 49 allows in a case of an operation of the pump 9 from the start of a filling of the tank with water, to cause priming of the pump 9 almost instantaneously when the level of this filling water reaches the upper end of this second fireplace 49.
  • the priming of the pump 9 always occurs for a planned quantity of filling water in the tank 3, which makes it possible to avoid the formation of an air-water mixture in the pump 9 which generates a noisy operation thereof.
  • the body 14 of the pump 9 contains only air and the operation of the pump 9 only in the air is silent.
  • the filling water level rises in the tank 3 and exceeds the predetermined height of the second chimney 49, the entry of air into the body 14 of the pump 9 is greatly disturbed, and the water is very quickly removed to the air in this body 14 so that the formation of an air-water mixture is stopped from its birth, and the operation of the pump 9 remains silent.
  • the second chimney 49 is replaced by one or more holes drilled in the wall of the air intake chimney 18 at a chosen level or at different predetermined levels. This or these holes play the same function as that, described in a previous paragraph, of the second chimney 49, and allow silent operation of the pump 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Steroid Compounds (AREA)
EP82401757A 1981-10-02 1982-09-28 Gerät zum Pumpen einer Flüssigkeit und Maschine, versehen mit einem solchen Gerät Expired EP0076739B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401757T ATE13628T1 (de) 1981-10-02 1982-09-28 Geraet zum pumpen einer fluessigkeit und maschine, versehen mit einem solchen geraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8118640 1981-10-02
FR8118640A FR2514082B1 (fr) 1981-10-02 1981-10-02 Dispositif de pompage de liquide et appareil muni d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP0076739A1 true EP0076739A1 (de) 1983-04-13
EP0076739B1 EP0076739B1 (de) 1985-06-05

Family

ID=9262710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401757A Expired EP0076739B1 (de) 1981-10-02 1982-09-28 Gerät zum Pumpen einer Flüssigkeit und Maschine, versehen mit einem solchen Gerät

Country Status (5)

Country Link
EP (1) EP0076739B1 (de)
AT (1) ATE13628T1 (de)
DE (1) DE3264062D1 (de)
DK (1) DK429982A (de)
FR (1) FR2514082B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0268835A3 (en) * 1986-11-27 1990-01-31 Industrie Zanussi S.P.A. Pump unit, particularly for dishwashers
US5470142A (en) * 1991-12-20 1995-11-28 Fisher & Paykel Limited Dishwasher
WO2007066968A1 (en) 2005-12-09 2007-06-14 Lg Electronics Inc. Dish washer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294102A (en) * 1964-12-09 1966-12-27 Whirlpool Co Dishwashing apparatus having improved pump means
DE1933672A1 (de) * 1969-07-02 1971-01-14 Moczala Dr Ing Helmut Motor-Pumpen-Einheit
FR2194395A1 (de) * 1972-07-31 1974-03-01 Bosch Hausgeraete Gmbh
US3973866A (en) * 1975-01-02 1976-08-10 Vaughan Co., Inc. Centrifugal chopping slurry pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294102A (en) * 1964-12-09 1966-12-27 Whirlpool Co Dishwashing apparatus having improved pump means
DE1933672A1 (de) * 1969-07-02 1971-01-14 Moczala Dr Ing Helmut Motor-Pumpen-Einheit
FR2194395A1 (de) * 1972-07-31 1974-03-01 Bosch Hausgeraete Gmbh
US3973866A (en) * 1975-01-02 1976-08-10 Vaughan Co., Inc. Centrifugal chopping slurry pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0268835A3 (en) * 1986-11-27 1990-01-31 Industrie Zanussi S.P.A. Pump unit, particularly for dishwashers
US5470142A (en) * 1991-12-20 1995-11-28 Fisher & Paykel Limited Dishwasher
US5709237A (en) * 1991-12-20 1998-01-20 Fisher & Paykel Limited Dishwasher
US5755244A (en) * 1991-12-20 1998-05-26 Fisher & Paykel Limited Dishwasher
WO2007066968A1 (en) 2005-12-09 2007-06-14 Lg Electronics Inc. Dish washer
EP1973459A4 (de) * 2005-12-09 2016-12-21 Lg Electronics Inc Geschirrspülmaschine

Also Published As

Publication number Publication date
EP0076739B1 (de) 1985-06-05
DK429982A (da) 1983-04-03
DE3264062D1 (en) 1985-07-11
FR2514082A1 (fr) 1983-04-08
FR2514082B1 (fr) 1985-12-06
ATE13628T1 (de) 1985-06-15

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