EP1230890A2 - Procédé et dispositif pour commander une valve dans un lave-vaiselle - Google Patents

Procédé et dispositif pour commander une valve dans un lave-vaiselle Download PDF

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Publication number
EP1230890A2
EP1230890A2 EP01127524A EP01127524A EP1230890A2 EP 1230890 A2 EP1230890 A2 EP 1230890A2 EP 01127524 A EP01127524 A EP 01127524A EP 01127524 A EP01127524 A EP 01127524A EP 1230890 A2 EP1230890 A2 EP 1230890A2
Authority
EP
European Patent Office
Prior art keywords
valve
speed
circulation pump
ball
dishwasher
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
EP01127524A
Other languages
German (de)
English (en)
Other versions
EP1230890A3 (fr
EP1230890B1 (fr
Inventor
Winfried Steiner
Karlheinz Kohles
Stefan Füglein
Klaus-Martin Forst
Jürgen Vogel
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.)
AEG Hausgeraete GmbH
Original Assignee
AEG 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 AEG Hausgeraete GmbH filed Critical AEG Hausgeraete GmbH
Publication of EP1230890A2 publication Critical patent/EP1230890A2/fr
Publication of EP1230890A3 publication Critical patent/EP1230890A3/fr
Application granted granted Critical
Publication of EP1230890B1 publication Critical patent/EP1230890B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms

Definitions

  • the invention relates to a method and a device for controlling a valve of a dishwasher.
  • Valves for dishwashers are known, the one Have cavity delimited by a valve body is.
  • Such valves have an inlet for the rinsing liquid and at least via an outlet, the by a closing element movably arranged in the cavity is lockable. Opening the outlet is done by a change in the position of the closing element is achieved. To the pressure of the flushing liquid on the closing element degraded what is usually by switching off the circulation pump happens. Due to the back pressure of one The closing element is removed from the water column or liquid column from its rest position and that when the Pressure of the circulation pump is less than the pressure of the water column.
  • Fixing the locking element in a new position to block another outlet is known in the Valves are time-controlled, i.e. after a certain
  • the circulating pump is set again switched on, so that the closing element through the building pressure is fixed in the new position.
  • EP 0 237 994 B1 discloses a reversing valve in which a ball is enclosed in a cavity.
  • the cavity is connected on the input side to a circulation pump and on the output side through a first outlet with a first line to a lower spray arm and through a second outlet with a second line to an upper spray arm.
  • valve ball When the pump is briefly switched off, the valve ball is pushed away from the second outlet in the direction of the first outlet by the back-flowing liquid from the second line. The valve ball remains near the first outlet as long as the liquid flows out of the second line. If the circulation pump is switched on again within this period, the ball is pressed by the liquid flow in the cavity to the first outlet and closes it.
  • This provides a valve with two switch positions in which the liquid flow can be discharged either through the first or through the second outlet.
  • a leakage liquid bypass from the cavity to the second outlet ensures that even in the position in which the valve ball closes the second outlet, a small amount of liquid flows into the second line in order to perform the switching process described by the backflushing flushing liquid from the second line enable. However, it is not possible to check the actual switching position.
  • a valve for a dishwasher is known in which the position of the closing element over at least one Sensor is detected.
  • the sensor signal is used for positioning of the closing element. At least that is a switching position of the valve can be monitored and the Control of the dishwasher can be done accordingly detected valve position take place or be corrected.
  • the attachment of a sensor including the hardware and Software for the evaluation of the sensor signal is on the one hand complex, and on the other hand represents a source of error represents.
  • the object of the invention is a valve to propose for a dishwasher in which the switching position of the valve is reliable with little effort can be adjusted.
  • This task is accomplished through a method of controlling a Solved valve that acts on the spray arms one Dishwasher with water is used, the valve at least two outputs and one input for connection to a circulation pump, the valve being a closing element to close the outputs and the valve (V) depending on the speed of the Circulation pump is controlled.
  • valve is designed or arranged so that the Closing element (K) due to the action of gravity is changeable. Then the closing element takes on appropriate pressure conditions automatically a defined Home or rest position on.
  • the method can be applied with a device the spray arms (OS, US) of a dishwasher perform with water using a valve the at least two outputs (AO, AU) for one each Spray arm (OS, US) and at least one connection to a circulation pump (P), the valve being a closing element (K) to close the outputs (AO, AU) and wherein the circulation pump is speed controlled.
  • Fig. 1 shows a schematic representation of the rinsing liquid circuit in a dishwasher.
  • the dishwasher's washing compartment is an upper spray arm OS and a lower spray arm US to act on the in the baskets GK stored items with washing liquid arranged.
  • the sprayed from the spray arms OS, US Flushing liquid is at the bottom of the wash cabinet in the dishwasher sump S caught.
  • the collected rinsing liquid is drawn in by a circulation pump P via an inlet and a changeover valve V via a connecting line AP fed.
  • the rinsing liquid runs through a first flushing line SOS to the upper spray arm OS and through a second flushing line SUS to the lower spray arm US.
  • the switching valve V is in reproduced schematic, enlarged representation.
  • Valve body VK of switch valve V encloses one Cavity HR, in which a ball K is enclosed.
  • the valve body VK has one first opening AO on the right side that the cavity HR connects to the first flushing line SOS. On the left The valve body VK has a second opening AU, which connects the cavity HR with the second flushing line SUS. It is also located on the top of the valve body VK a bypass opening AB that the cavity HR with the bypass line BP connects.
  • the ball K movably mounted in the cavity HR is in the Cavity HR through lower guide edges FU and upper guide edges FO led. Enable the leading edges FU, FO the ball 14 moving along the axis between the first and second openings AO, AU being through a leadership game a lateral offset of the ball compared to the Leading edges are allowed to clamp the ball to avoid.
  • the changeover valve V enables three closed positions Ball K, designated I, II and III in FIGS. 2 and 3 are.
  • the geometric relationships of the relative positions the sphere are only shown schematically to the To explain switching sequences.
  • Ball K In position II, which is shown in Fig. 2 by a dashed line Ball K is shown, the ball K closes the second Opening AU so that the rinsing liquid essentially through the first outlet AO and slightly through the bypass opening AB exits.
  • Ball K In position III, which is also indicated by a dashed line Ball K is shown, ball K closes the bypass opening AB so that the flushing fluid flow divided on the guide body LK and both by the first Opening AO as well as through the second opening AU.
  • both the upper spray arm OS and the lower spray arm US is supplied with rinsing liquid.
  • either the upper spray arm OS or US washing liquid to the lower spray arm either the upper spray arm OS or US washing liquid to the lower spray arm.
  • the ball K is due the pressure difference between the pressure of the washing liquid in the cavity HR and the outlet pressure of the Flushing liquid held in the SOS, SUS or BP lines.
  • the circulation pump P known from FIG. 1 is connected to a speed monitoring device N connected. Because of the Pump P built-up pressure depends on the speed N can the pressure ratios depending on the speed can be set. It is believed that the pump P in the valve position of the ball K shown in FIG. 1 (Position I, Fig. 2) has been in operation for some time. This means that the lower spray arm US over the lower Spray line SUS is applied and thus the lower basket GK is rinsed. About the one already described above Leakage water device is in the first flush line SUS built a water column WS, its potential Energy exerts pressure from PWS on the ball. As long as the pressure Pp built up by the pump P is greater than or equal to is the pressure PWS of the water column WS, the ball K in their closed position I held.
  • the speed is now used to initiate a switching process the pump is reduced. This can be done with a speed controlled Pump by switching off the pump motor or in that the pump motor with a lower Performance is operated. However, it would also be conceivable train the pump motor speed controlled so that a exact speed reduction could be achieved.
  • Pp which is less than the pressure PWS of the water column WS
  • the water runs out of the riser pipe back to the upper spray arm OS and displaces the ball K from Outlet AO along the inclined plane caused by the slope of valve V is given.
  • the circulation pump P runs during this time, however, because after the shutdown has a certain outlet. Due to this Outlet and the one flowing back from the water column WS Flushing liquid adjusts to a flow that is the speed and determines the distance that the ball K travels in the valve.
  • the ball K becomes the positions I, II or III shown in FIG. 2 each at reach a certain speed or get close to it the new position I, II or III, that when switching on again at a predetermined speed value N considering the inertia of the system (Pump start-up characteristics, pressure build-up in the overall system, Size of the leakage water pipes etc.), the ball after Build up the necessary pump pressure Pp exactly in your Location is fixed.
  • the pump is switched off, so that the speed n depends on the pump run-out and depends reduced by the inertia of the system.
  • Speed n1 is the pressure of the circulation pump at the time t1 the value P1, which is less than the pressure of the PWS water column.
  • the ball K leaves the one previously taken Position I (Fig. 2) and moves on the inclined plane within the valve V towards above, i.e. towards positions III and II.
  • the circulation pump P is switched on again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP20010127524 2001-02-13 2001-11-17 Procédé et dispositif pour commander une valve dans un lave-vaiselle Expired - Lifetime EP1230890B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10106525 2001-02-13
DE2001106525 DE10106525A1 (de) 2001-02-13 2001-02-13 Verfahren und Vorrichtung zur Steuerung eines Ventiles einer Geschirrspülmaschine

Publications (3)

Publication Number Publication Date
EP1230890A2 true EP1230890A2 (fr) 2002-08-14
EP1230890A3 EP1230890A3 (fr) 2002-10-30
EP1230890B1 EP1230890B1 (fr) 2006-07-19

Family

ID=7673805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010127524 Expired - Lifetime EP1230890B1 (fr) 2001-02-13 2001-11-17 Procédé et dispositif pour commander une valve dans un lave-vaiselle

Country Status (2)

Country Link
EP (1) EP1230890B1 (fr)
DE (2) DE10106525A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1392806A (en) * 1971-04-27 1975-04-30 Hoover Ltd Washing machines
EP0237994A2 (fr) * 1986-03-19 1987-09-23 INDUSTRIE ZANUSSI S.p.A. Lave-vaisselle avec une soupape de distribution dans le cycle du liquide
EP1088509A1 (fr) * 1999-10-01 2001-04-04 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle domestique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1392806A (en) * 1971-04-27 1975-04-30 Hoover Ltd Washing machines
EP0237994A2 (fr) * 1986-03-19 1987-09-23 INDUSTRIE ZANUSSI S.p.A. Lave-vaisselle avec une soupape de distribution dans le cycle du liquide
EP1088509A1 (fr) * 1999-10-01 2001-04-04 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle domestique

Also Published As

Publication number Publication date
EP1230890A3 (fr) 2002-10-30
DE50110493D1 (de) 2006-08-31
DE10106525A1 (de) 2002-08-22
EP1230890B1 (fr) 2006-07-19

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