EP1183985A2 - Valve pour lave-vaisselle avec dispositif de fermeture mobile - Google Patents

Valve pour lave-vaisselle avec dispositif de fermeture mobile Download PDF

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Publication number
EP1183985A2
EP1183985A2 EP01113592A EP01113592A EP1183985A2 EP 1183985 A2 EP1183985 A2 EP 1183985A2 EP 01113592 A EP01113592 A EP 01113592A EP 01113592 A EP01113592 A EP 01113592A EP 1183985 A2 EP1183985 A2 EP 1183985A2
Authority
EP
European Patent Office
Prior art keywords
outlet
sensor
closing element
valve
ball
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
EP01113592A
Other languages
German (de)
English (en)
Other versions
EP1183985B1 (fr
EP1183985A3 (fr
Inventor
Klaus-Martin Forst
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 EP1183985A2 publication Critical patent/EP1183985A2/fr
Publication of EP1183985A3 publication Critical patent/EP1183985A3/fr
Application granted granted Critical
Publication of EP1183985B1 publication Critical patent/EP1183985B1/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 valve for a Dishwasher with one in a cavity Valve body movably arranged closing element.
  • valve body encloses a cavity in which a movably arranged Valve ball is included.
  • the inlet side of the valve is with a circulation pump and the outlet side with a Spray arm of a washroom connected.
  • the valve ball takes a rest position in the cavity, in which can be fixed by an actuator, so that despite the onset of flow, the valve ball in the Rest position is held.
  • the Actuator is the valve ball through the Liquid flow entrained and against the outlet pressed so that it is completely closed. at this valve, however, it can happen that the ball at only short interruption phases of the circulation pump by the Do not return from the liquid line into the Resting position returns.
  • EP 0 237 994 B1 discloses a reversing valve in which in a sphere 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.
  • the valve ball is in a rest position, from which you switch on the Pump is raised to the second outlet and this closes. If the pump is switched off briefly, the Valve ball through the backflowing liquid from the second line from the second outlet towards the first Outlet pushed. The valve ball stays close to the first outlet as long as the liquid from the second Line flows.
  • the object of the invention is a valve to propose for a dishwasher in which the Switch position of the valve can be detected.
  • a valve for a Dishwasher in which a valve body encloses a cavity in which a movably arranged Closure element is included. Through an inflow a liquid is fed into the cavity and through at least one outlet (hereinafter referred to as the first outlet is referred to) in a liquid line (which in the hereinafter referred to as the first liquid line) omitted.
  • the first outlet is through the closing element Lockout.
  • a sensor for detecting the position is regular an optical sensor, a conductivity sensor, a Ultrasonic sensor, a mechanical motion sensor, etc.
  • the conductivity sensor can e.g. be detected that the Conductivity when positioning the closing element the sensor position drops when the closing element is insulating, or that the conductivity increases if that Closing element is conductive.
  • the sensor can detect whether the closing element occupies a certain position or it occupies a certain position Position happens. This can be done by evaluating the signals the functioning of the sensor in a detection device of switching the valve checked and, if necessary, a Actuation of the valve to correct the switching position be carried out. Such a malfunction could e.g. occur when the switching behavior of the valve is temporal Is subject to fluctuations or if the closing element in the Cavity is jammed and therefore not the desired one Takes position.
  • the position of the sensor is the closed position of the Closing element at the first outlet, the locking of the Liquid flow through the first outlet can be detected.
  • the detection signal is during the closing time permanently on.
  • the Position of the sensor at a passage position of the Closure element that the closure element between the Closed position at the first outlet and a rest position of the Closing element takes.
  • An example of the application is the valve known from DE 197 10 644 A1.
  • another connects Outlet hereinafter referred to as the second outlet
  • a second line with the cavity and is also through the closing element can be locked.
  • the first sensor can then switch between the closed position of the Closing element at the first outlet and the closed position can be detected at the second outlet and vice versa.
  • a leakage flow device arranged at the first outlet, which causes that at blocked first outlet a reduced liquid flow flows into the first liquid line and fills it holds.
  • a switchover between the Lock the first outlet and the second outlet be achieved, e.g. known from EP 0 237 994 B1 is.
  • a second sensor By placing a second sensor on a second Position, can independently be two different Closed positions of the closing element or Passage positions of the closing element can be detected.
  • the first is or second position of the sensor a dynamic Equilibrium position of the closing element in which the Closing element during a backflow phase of the Liquids from the first and second liquid lines temporarily lingers.
  • the dwell time of the closing element in this position is compared to others Passage positions longer, so that the closing element is securely detectable at this position.
  • Control of the switch position is further simplified of the valve because there is a longer time window around which Switch the valve so that the first or the second outlet is blocked. At this position e.g. by just one Sensor a safe switching of the valve can be achieved.
  • valve is between the first outlet and the second outlet a third outlet arranged, also through the closing element is lockable.
  • the Rinsing liquid e.g. omitted into a third line be or directly from the valve into a wash cabinet Dishwasher.
  • the third line can e.g. with a Dishwasher sump, an intake pipe of a circulation pump or an additional spray arm.
  • the senor or the Sensor optical sensors that the closing element contact-free and therefore wear-free.
  • the simultaneous use of the is particularly advantageous optical sensor as a turbidity sensor. With that the Sensor has a double function by firstly a position of the Closure element is detected and the other Soiling of the washing liquid in the dishwasher is detectable.
  • the arrangement of the sensor in one is advantageous here Passage position of the closing element or in the dynamic equilibrium position of the closing element because at these positions, the closing element only for a short time is detected and in the rest of the time the sensor the turbidity the detergent can detect.
  • a cloudiness becomes in these positions from the closing element e.g. thereby distinguished that the passage of the closing element through a brief, sharp change in the signal is detected, while the degree of pollution over time Averaging, as a long-term change in the signal is recognized.
  • two sensors are in a first position in the connecting line from the inlet to the first outlet and in a second position from the inlet to the second outlet or in their proximity arranged, so the Degree of contamination of the rinsing liquid flowing past be recorded. If e.g. only the first or only the second Outlet are unlocked, this prevents a Dirt particles in the dead volume at the flow-free position the signal is impaired and therefore the degree of turbidity is not reproduces correctly.
  • the turbidity sensor can be a conductivity sensor the change in conductivity due to pollution detected.
  • An optical sensor is preferably used.
  • the optical sensor can be designed as a reflection sensor, which is either the reflection of the dirt particles in the Rinsing liquid or captured by the closing element or the Reflection of the optical signal on the opposite Inner wall of the cavity, which sends the signal to the sensor reflected back.
  • the reflection sensor must The sensor is only integrated on one side of the valve body become.
  • a light barrier can be used the at opposite positions on the inner wall of the Cavity is arranged, the change of Light intensity when passing through the rinsing liquid in the Cavity is detected.
  • Fig. 1 shows a schematic representation of the Rinsing liquid circuit in a dishwasher.
  • a washing compartment 1 of the dishwasher is an upper one Spray arm 2 and a lower spray arm 3 to act on the in 4 baskets of dishes stored with dishwashing liquid arranged.
  • the sprayed from spray arms 2, 3 Flushing liquid is at the bottom of the washroom 1 in the Dishwasher sump 5 caught.
  • the trapped Flushing liquid is fed via an inlet from a circulation pump 6 sucked in and through a connecting line 7 Changeover valve 8 supplied.
  • the rinsing liquid runs through a first rinse line 9 to the upper spray arm 2 and through a second rinse line 10 to the lower spray arm 3. Furthermore branches from the changeover valve 8 from a bypass line 11, which in the inlet to the circulation pump 6 opens.
  • the switching valve 8 is in a schematic, reproduced enlarged view.
  • a valve body 12 of the switching valve 8 encloses a cavity 13 in which a ball 14 is included.
  • the valve body 12 has a first opening 15 on the right side that defines the cavity 13 connects to the first flushing line 9.
  • the valve body 12 has a second opening 16, which connects the cavity 13 to the second flushing line 10.
  • a Flow guide body 18 formed from the Connection line 7 inflowing rinsing liquid aerodynamically to the first and / or second opening 15, 16 passes.
  • the ball 14 movably mounted in the cavity 13 is in the Cavity 13 through lower guide edges 19 and upper Leading edges 20 out.
  • the guide edges 19, 20 allow the ball 14 to move along the axis between the first and second openings 15, 16, being through a leading game a lateral offset of the ball opposite the leading edges is allowed to clamp the To avoid bullet.
  • the switching valve 8 enables three closed positions Ball 14, designated I, II and III in Figures 2A and 2B are.
  • the geometric relationships of the relative positions the sphere are only shown schematically to the To explain switching sequences.
  • Fig. 2B shows a position IV of the ball, this one occupies temporary time.
  • the Circulation pump 6 in position I of the ball moves by the backflow of the rinsing liquid from the first Flush line 9 to almost the position II. Due to the sufficient drainage of the rinsing liquid through the Circulation pump 6 can, however, flush liquid at the same time flow back to the second flushing line 10.
  • This will make the Sphere by the action of both backflows from the Lines 9, 10 from position II to position IV postponed.
  • the ball is held in this position as long as liquid from both flush lines flowing back. In this state the ball comes temporarily come to a standstill before deriving the Liquids from the flush lines due to the potential Energy through the lower leading edge 19 back into yours Resting position at or near position I returns.
  • FIGS. 2A and 2B are indicated by positions A, B and C. Positions indicated in which the ball passes through Light barriers is detected. The light barriers are below described in more detail.
  • the ball remains in the positions A, B and C shown 14 only during the switching phases of the valve 8, so that Light signal is not constantly interrupted by the ball.
  • the measurement of the Turbidity of the rinsing liquid undisturbed by the short-term Ball signal (approx. 1/10 s for A and B).
  • a short-term complete shadowing of the Receiver of the light barrier that the ball is one Pass position has passed.
  • the switching cycle from the closed position I can be like can be controlled as follows:
  • the ball is in the closed position I and the circulation pump 6 is off. Thereupon at position A by the Light barrier changing the position of the ball from I to III recorded. Immediately afterwards the circulation pump set, the ball can be in position III be held.
  • the switching valve 8 switch as follows:
  • the starting position is again position I and the pump is switched off. If the signal from position A can be obtained by switching on the pump the ball is held in position III.
  • the signal from the Position C determined in which the ball in position IV is can by turning on the circulation pump 6 during the Dark phase in position C the ball in position II be pushed.
  • the advantage of arranging the light barriers according to FIG. 2B is that the light barrier in position C for longer time window can detect the dark signal, so that in this position by switching on the pump II can be started safely.
  • moves the ball from position IV it rolls on its own the potential energy at the lower leading edge 19 back, which is slower than when the ball passes through the returning currents would be driven.
  • This allows the Position III is also safer when the ball rolls back can be controlled. This makes switching less critical against switch-on delays, signs of aging Pump or other flow disturbances and that Switching of the switching valve 8 takes place reliably.
  • the switching cycle from the closed position II can be like can be controlled as follows:
  • the switching cycle from the closed position III can be as follows to be controlled:
  • the ball can be started the circulation pump after a short wait in the Closed position I be pushed.
  • Fig. 3 shows a top view of the changeover valve 8 on which a light barrier 21 for detecting the position A and a light barrier 22 for detecting the position B or C are arranged.
  • a light barrier 21 for detecting the position A and a light barrier 22 for detecting the position B or C are arranged.
  • Side surface of the valve body 12 are the light emitting diodes Photoelectric switches 21, 22 installed while at the bottom illustrated side surface of the valve body 12 the receiver are installed.
  • the light barriers 21, 22 are with a Evaluation unit 23 connected in which the signals are acquired and be evaluated. The evaluated signals become Monitoring and control of a not shown Control circuit supplied to the dishwasher.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP20010113592 2000-08-31 2001-06-15 Valve pour lave-vaisselle avec dispositif de fermeture mobile Expired - Lifetime EP1183985B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10042781 2000-08-31
DE2000142781 DE10042781A1 (de) 2000-08-31 2000-08-31 Ventil für eine Geschirrspülmaschine mit einem beweglich angeordneten Verschliesselement

Publications (3)

Publication Number Publication Date
EP1183985A2 true EP1183985A2 (fr) 2002-03-06
EP1183985A3 EP1183985A3 (fr) 2002-10-30
EP1183985B1 EP1183985B1 (fr) 2008-04-16

Family

ID=7654427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010113592 Expired - Lifetime EP1183985B1 (fr) 2000-08-31 2001-06-15 Valve pour lave-vaisselle avec dispositif de fermeture mobile

Country Status (2)

Country Link
EP (1) EP1183985B1 (fr)
DE (2) DE10042781A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1543764A2 (fr) * 2003-12-19 2005-06-22 Electrolux Home Products Corporation N.V. Lave-vaisselle avec distributeur de fluide et procédé pour la commutation du distributeur
EP2532295A1 (fr) * 2012-09-25 2012-12-12 V-Zug AG Aiguillage d'eau dans un appareil ménager

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10222215A1 (de) * 2002-05-16 2003-12-04 Electrolux Home Prod Corp Verfahren zum Betreiben einer Geschirrspülmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19710644A1 (de) * 1996-03-16 1997-09-18 Lg Electronics Inc Waschwasserzufuhrregelungsvorrichtung für eine Geschirrspülmaschine
DE19712852A1 (de) * 1997-03-27 1998-10-08 Baelz Gmbh Helmut Regelventil mit Stellungsregler
FR2789451A1 (fr) * 1999-02-08 2000-08-11 Siebe Appliance Controls Sa Dispositif de commande de l'orientation d'un fluide
EP1088509A1 (fr) * 1999-10-01 2001-04-04 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle domestique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19710644A1 (de) * 1996-03-16 1997-09-18 Lg Electronics Inc Waschwasserzufuhrregelungsvorrichtung für eine Geschirrspülmaschine
DE19712852A1 (de) * 1997-03-27 1998-10-08 Baelz Gmbh Helmut Regelventil mit Stellungsregler
FR2789451A1 (fr) * 1999-02-08 2000-08-11 Siebe Appliance Controls Sa Dispositif de commande de l'orientation d'un fluide
EP1088509A1 (fr) * 1999-10-01 2001-04-04 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle domestique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1543764A2 (fr) * 2003-12-19 2005-06-22 Electrolux Home Products Corporation N.V. Lave-vaisselle avec distributeur de fluide et procédé pour la commutation du distributeur
EP1543764A3 (fr) * 2003-12-19 2006-05-24 Electrolux Home Products Corporation N.V. Lave-vaisselle avec distributeur de fluide et procédé pour la commutation du distributeur
EP2532295A1 (fr) * 2012-09-25 2012-12-12 V-Zug AG Aiguillage d'eau dans un appareil ménager

Also Published As

Publication number Publication date
EP1183985B1 (fr) 2008-04-16
DE10042781A1 (de) 2002-03-14
EP1183985A3 (fr) 2002-10-30
DE50113853D1 (de) 2008-05-29

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