EP3516124B1 - Drain fitting for a wc flush tank - Google Patents

Drain fitting for a wc flush tank Download PDF

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Publication number
EP3516124B1
EP3516124B1 EP17761803.0A EP17761803A EP3516124B1 EP 3516124 B1 EP3516124 B1 EP 3516124B1 EP 17761803 A EP17761803 A EP 17761803A EP 3516124 B1 EP3516124 B1 EP 3516124B1
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EP
European Patent Office
Prior art keywords
drain fitting
water
fitting according
push button
pneumatic actuator
Prior art date
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EP17761803.0A
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German (de)
French (fr)
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EP3516124B8 (en
EP3516124A1 (en
Inventor
Jürgen Burkhardt
Christian Koch
Sven Wöhler
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Grohedahl Sanitarsysteme GmbH
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Grohedahl Sanitarsysteme GmbH
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Publication of EP3516124A1 publication Critical patent/EP3516124A1/en
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Publication of EP3516124B1 publication Critical patent/EP3516124B1/en
Publication of EP3516124B8 publication Critical patent/EP3516124B8/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D5/00—Special constructions of flushing devices, e.g. closed flushing system
    • E03D5/02—Special constructions of flushing devices, e.g. closed flushing system operated mechanically or hydraulically (or pneumatically) also details such as push buttons, levers and pull-card therefor
    • E03D5/024—Operated hydraulically or pneumatically
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
    • E03D1/02—High-level flushing systems
    • E03D1/14—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves
    • E03D1/142—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves in cisterns with flushing valves
    • E03D1/144—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves in cisterns with flushing valves having a single flush outlet and an additional float for delaying the valve closure
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
    • E03D1/30—Valves for high or low level cisterns; Their arrangement ; Flushing mechanisms in the cistern, optionally with provisions for a pre-or a post- flushing and for cutting off the flushing mechanism in case of leakage
    • E03D1/302—Valves for high or low level cisterns; Their arrangement ; Flushing mechanisms in the cistern, optionally with provisions for a pre-or a post- flushing and for cutting off the flushing mechanism in case of leakage with valves kept in open position by means of air or water pressure or by vacuum
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D3/00—Flushing devices operated by pressure of the water supply system flushing valves not connected to the water-supply main, also if air is blown in the water seal for a quick flushing
    • E03D3/12—Flushing devices discharging variable quantities of water

Definitions

  • the invention relates to a drain fitting for a toilet cistern according to the preamble of patent claim 1.
  • a drain fitting is in the document WO2006 / 012650A1 described.
  • a toilet cistern has a filling valve connected to the water supply network and a drain valve.
  • the toilet cistern can be filled with water to a specified level.
  • the drain valve is usually made up of a drain nozzle mounted on the bottom of the cistern and an overflow pipe that can be adjusted in stroke. In its closed position, the overflow pipe closes a flow passage through the drain connection.
  • the overflow pipe By pressing a pushbutton on the user side, the overflow pipe can be lifted into its open position, in which a quantity of flush water can flow out of the drain connection of the toilet cistern.
  • the push button is in operative connection with the overflow pipe via a mechanical linkage.
  • a generic drain fitting is also known in which the pushbutton is not connected to the overflow pipe via a mechanical linkage, but via a pneumatic system.
  • the pneumatic system has a first bellows positioned on the push button, which is connected via a pneumatic line to a second bellows positioned on the overflow pipe.
  • the push button is pressed, the first bellows is compressed and an overpressure is thus generated, which can be applied to the second bellows.
  • the overpressure is applied, the second bellows expands, whereby the overflow pipe is moved into its open position.
  • the above pneumatic system is both space-consuming and component-intensive. The implementation of the pneumatic system is therefore associated with high costs and is complex to carry out in terms of assembly.
  • the object of the invention is to provide a drain fitting for a toilet cistern which, compared to the prior art, can be implemented in a reduced space and in components.
  • a bellows is dispensed with in the pneumatic system, which adjusts the stroke of the overflow pipe when overpressure is applied.
  • the pneumatic system according to the invention has precisely one pneumatic actuator which can be subjected to a negative pressure to adjust the stroke of the overflow pipe.
  • the drain fitting also has a vacuum unit that is fluidically connected to the pneumatic actuator. When activated by the user, the negative pressure unit generates negative pressure acting on the pneumatic actuator in order to adjust the stroke of the overflow pipe.
  • the pneumatic system can be implemented as a bellows, a piston-cylinder unit or as a diaphragm lift system.
  • the membrane lifting system can, for example, have at least one working chamber which can be acted upon by negative pressure and which is delimited by a deformable membrane.
  • the deformable membrane can be connected to the overflow pipe.
  • the pneumatic actuator can be a bellows which contracts like an accordion when a negative pressure is applied and, when the negative pressure is released, pulls apart (that is, expands) like an accordion.
  • the negative pressure unit can be an electrically controllable vacuum pump or a water-carrying negative pressure unit, that is to say a vacuum nozzle or a water jet pump.
  • the vacuum nozzle / water jet pump can be connected to the pneumatic actuator via a vacuum line. If water flows through the vacuum nozzle / water jet pump, air is therefore sucked out of the pneumatic actuator, that is, a negative pressure is generated in the pneumatic actuator.
  • the above water-carrying negative pressure unit can have a throttle point with a flow cross-section constriction between its water inlet side and its water outlet side in the manner of a Venturi nozzle.
  • the vacuum line can preferably open into the flow channel of the vacuum unit at the throttle point.
  • the pneumatic actuator (that is, for example, the bellows) can be arranged in the vertical direction of the drain fitting, in particular in alignment above the overflow pipe.
  • the pneumatic actuator can preferably be connected to the overflow pipe via a rigid connecting element which, for example, coaxially extends the overflow pipe upwards.
  • the vacuum unit can be arranged in particular in alignment above the pneumatic actuator, whereby a particularly space-saving design of the pneumatic system is achieved.
  • the water-carrying negative pressure unit can be connected on its water inlet side to a control line which can be connected to the water supply network.
  • the control line can preferably branch off from a supply line leading to a filling valve of the toilet cistern.
  • the line pressure which is already present, is used to generate the negative pressure in the negative pressure unit without the need for additional external energy (for example, pressure actuation by the user or electrical energy).
  • the water-bearing The water outlet side of the vacuum unit can open directly into the interior of the toilet cistern.
  • the above variant is particularly advantageous for a toilet repair measure in which the water supply line to the toilet cistern is shut off at a corner valve in preparation.
  • the water supply to the toilet cistern and to the vacuum unit is interrupted.
  • the fitter In the case of a conventional toilet cistern, in which the push button is connected to the drain valve via a mechanical linkage, the fitter must empty the toilet cistern before starting the repair in order to prevent water from leaking out of the toilet cistern if the push button is unintentionally operated .
  • such a preventive emptying of the toilet cistern can be omitted for the following reason: Because of the angle valve shut-off, no water can be passed through the control line, so that the negative pressure unit cannot generate negative pressure. The drain valve thus remains reliably closed even if the push button is unintentionally actuated.
  • the vacuum unit can be activated by the user.
  • a control valve that can be operated by the user can be arranged for this purpose in the control line leading to the negative pressure unit, that is to say upstream of the water-carrying negative pressure unit.
  • the control valve can be a time-controlled actuation valve, for example a so-called self-closing valve.
  • the control valve can have a control piston which can be stroke-adjustable in a valve housing.
  • the control piston can be on the user side by means of at least one operated pushbutton can be adjusted.
  • the control piston In its non-actuated position, the control piston is spring-preloaded into a closed position in which a control piston valve plate is in sealing contact with a valve seat fixed to the housing and a flow path through the control valve is closed as a result.
  • the push button is pressed over a stroke of the key
  • the control piston is moved into its open position against the spring preload force.
  • the flow path through the control valve is released, so that water flows through the water-bearing negative pressure unit.
  • the control piston is returned to its closed position via a return stroke under the action of the spring preloading force.
  • the length of the above key stroke of the push button correlates with a reset time interval within which the control piston is returned to its closed position after the push button has been released.
  • the water-carrying negative pressure unit is traversed by the water volume flow and a negative pressure is generated which acts on the pneumatic actuator.
  • the length of the key stroke has a direct influence on the amount of flush water flowing out of the toilet cistern.
  • the user-operated push button can be assigned a stroke adjusting member that sets the maximum key stroke of the push button and thus also the reset time interval.
  • the drain fitting can have a first push button, when actuated a large amount of flush water flows out of the toilet cistern, and a second push button, when actuated a small amount of flush water flows out of the toilet cistern.
  • the user can determine the amount of flush water.
  • the two pushbuttons can be connected to the control piston in a force-transmitting manner, in particular for example with the interposition of a cross member, in such a way that the second pushbutton remains in its rest position when the first pushbutton is pressed.
  • the key stroke covered by one of the pushbuttons is thus identical to the piston stroke covered by the control piston.
  • each of the two pushbuttons is assigned a stroke adjustment member, with the aid of which the maximum possible stroke travel of the first and second pushbuttons can be set independently of one another. With such a control valve, different amounts of flushing water can be set variably.
  • FIG. 1 a waste set installed in a toilet cistern 1 with an associated pneumatic system 21 is shown.
  • the drain fitting has a drain connector 5 on the cistern floor, which is in flow connection with a toilet bowl in a manner not shown.
  • the drain connection 5 rests with a radially widened circumferential annular shoulder 7 on the opening edge region of an outlet opening on the bottom of the cistern floor.
  • the annular shoulder 7 of the drainage connection 5 is extended upwards with a circumferential housing wall 9 formed thereon, in which flow openings 11 are formed which are evenly distributed in the circumferential direction.
  • a stroke-adjustable overflow pipe 13 is arranged radially inside and coaxially to the housing wall 9 and rests with its radially outer valve disk 15 on a valve seat 17 formed on the annular shoulder 7 in a liquid-tight manner.
  • the circulating pipe 13 forms together with the drain connection 5 a drain valve 19, which can be actuated via the pneumatic system 21 of push buttons 23, 25, which in the Fig. 1 are delimited by a decorative plate 26 and installed in a building wall 28.
  • the pushbuttons 23, 25 When the pushbuttons 23, 25 are pressed, the circulation pipe 13 is moved by means of the pneumatic system 21 from one in the Figure 1 shown closed position into an open position ( Figures 6 and 7 ) stroke adjusted.
  • a filling valve is also installed in the toilet cistern 1 with which the toilet cistern 1 is filled with water up to a predetermined level.
  • the filling valve On the inlet side, the filling valve is connected to a supply line 29 leading to the water supply network.
  • the pneumatic system 21 has a bellows as the pneumatic actuator 31 and a vacuum nozzle 33 as the negative pressure unit.
  • the vacuum nozzle 33 is constructed in the manner of a Venturi nozzle and is connected on the inlet side to a control line 35 which branches off from the supply line 29.
  • a control valve 43 is arranged in the control line 35 and can be actuated via the pushbuttons 23, 25 which can be operated by the user.
  • a water flow path from the supply network to the vacuum nozzle 33 is opened in the control valve 43 and this is connected to a water volume flow ⁇ ( Fig. 3 or 6th ) flows through. In this way, a negative pressure is generated in the negative pressure line 37, with which the bellows 31 is drawn together.
  • the vacuum nozzle 33 opens into the interior of the toilet cistern 1.
  • the vacuum nozzle 33 has a throttle point with a flow cross-sectional constriction between its water inlet and water outlet side, at which a vacuum line 37 opens into the nozzle channel of the vacuum nozzle 33.
  • the vacuum nozzle 33 and the bellows 31 are to form a unit B ( Fig. 2 ) directly connected to each other.
  • the vacuum nozzle 33 in the Figure 2 a connection piece 39 through which the vacuum line 37 leads.
  • a pipe extension 41 of the bellows 31 is pushed onto the connecting piece 39 of the vacuum nozzle 33 and optionally fixed to it by means of a fastening clip, not shown.
  • the bellows 31 is in the Fig. 2 with its bellows base 45 facing away from the pipe extension 41 is coupled to a connecting rod 47 which in turn is fastened to the upper end of the overflow pipe 13.
  • control valve 43 shown together with a button housing 49 in which the two pushbuttons 23, 25 are arranged, also forms a structural unit.
  • the control valve 43 has a control piston 53 which can be lifted in a valve housing 51 on.
  • the control piston 53 is connected to the two pushbuttons 23, 25 in a force-transmitting manner with the interposition of a cross member 55.
  • the control piston 53 In the, in the Figure 3 In the non-use position shown, the control piston 53 is spring-preloaded into a closed position by means of a spiral spring 57.
  • the closed position shown is the control piston 53 with its valve plate 59 in sealing contact with a valve seat 61 fixed to the housing, whereby the flow path through the control valve 43 is closed.
  • the first and second pushbuttons 23, 25 can be adjusted into an open position over the maximum possible key travel h 1 , h 2 against the spring preload force generated by the spiral spring 57 ( Figure 4 or 5 ). In the open position, the flow path through the control valve 43 is released. When the pressure of the respective pressed pushbutton 23, 25 is released, the pushbutton 23, 25 is returned to its closed position under the action of the spring biasing force of the spiral spring 57.
  • the control valve 43 has two stroke adjusting members 63, 65 which are arranged in the key housing 49 so as to be adjustable in one stroke direction.
  • Each of the stroke adjustment members 63, 65 is assigned to one of the pushbuttons 23, 25.
  • the stroke adjustment members 63, 65 act as depth stops which limit the stroke path of the respective pushbutton 23, 25.
  • the control piston 53 When the pushbutton is released after the pushbutton has been actuated, the control piston 53 automatically returns to its closed position under the action of a spring force, specifically within a reset time interval. Within the reset time interval, the flow path through the control valve 43 remains open, so that a water volume flow ⁇ continues to be passed through the vacuum nozzle 33 and a negative pressure is thereby generated.
  • the length of the reset time interval correlates with a key travel length. This means that with a large key stroke length, the return of the push button 23, 25 is longer takes longer than with a shorter key travel length. Correspondingly, with a large key stroke length, a larger amount of flush water can flow out of the toilet cistern 1 than with a smaller key stroke length.
  • each of the pushbuttons 23, 25 can be assigned its own amount of flushing water flowing out of the toilet cistern 1. For example, when the first push button 23 is actuated, a small amount of flush water can flow out of the toilet cistern 1. In contrast, when the second pushbutton 25 is actuated, a larger amount of flush water can flow out of the toilet cistern 1.
  • the bellows 31 is positioned in the vertical direction of the drain fitting in alignment above the overflow pipe 31 according to the figures.
  • the vacuum nozzle 33 is also positioned approximately in alignment above the bellows 31.
  • FIG. 8 a further development of the pneumatic system 21 shown in the previous figures is shown.
  • the bellows guide 67 has a hollow cylindrical, pot-like bellows housing 69 which is designed to be rotationally symmetrical with respect to a housing axis G and which is attached to the vacuum nozzle 33 with its pot bottom 71.
  • guide channels 73 are formed, in which guide pins 75 are guided axially parallel to the housing axis G.
  • the guide pins 75 are fastened to the connecting rod 47 via transverse webs 77.
  • an additional third push button 26 is provided, which together with the other two push buttons 23, 25 is bounded by the decorative plate 30.
  • the third pushbutton 26 When the third pushbutton 26 is pressed, an average amount of flush water can flow out of the toilet cistern 1.
  • the third pushbutton 26, like the two other pushbuttons 23, 25, transmits force with the interposition of the cross member 55 in connection with the control piston 53.
  • the third pushbutton 26 is also assigned a stroke setting element, not shown, with which the maximum possible stroke of the third Push button 26 is adjustable.
  • each of the Hubeinstellglieder an adjusting wheel 79 is assigned, which can be rotated by the user.
  • the respectively assigned stroke adjusting element can be adjusted by means of a rotary actuation.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Sanitary Device For Flush Toilet (AREA)

Description

Die Erfindung betrifft eine Ablaufgarnitur für einen WC-Spülkasten nach dem Oberbegriff des Patentanspruches 1. Eine solche Ablaufgarnitur ist in der Druckschrift WO2006/012650A1 beschrieben.The invention relates to a drain fitting for a toilet cistern according to the preamble of patent claim 1. Such a drain fitting is in the document WO2006 / 012650A1 described.

Ein WC-Spülkasten weist in gängiger Praxis ein am Wasserversorgungsnetz angeschlossenes Füllventil sowie ein Ablaufventil auf. Über das zum Beispiel schwimmergesteuerte Füllventil kann der WC-Spülkasten bis auf einen vorgegebenen Füllstand mit Wasser gefüllt werden. Das Ablaufventil ist üblicherweise aus einem am Spülkasten bodenseitig montierten Ablaufstutzen und einem hubverstellbaren Überlaufrohr aufgebaut. Das Überlaufrohr schließt in seiner Geschlossenstellung einen Strömungsdurchlass durch den Ablaufstutzen. Durch eine nutzerseitige Druckbetätigung eines Drucktasters kann das Überlaufrohr in seine Offenstellung hubverstellt werden, in der eine Spülwassermenge aus dem Ablaufstutzen des WC-Spülkastens ausströmen kann. Der Drucktaster ist bei einem herkömmlichen WC-Spülkasten über ein mechanisches Gestänge in Wirkverbindung mit dem Überlaufrohr.In common practice, a toilet cistern has a filling valve connected to the water supply network and a drain valve. Using the float-controlled filling valve, for example, the toilet cistern can be filled with water to a specified level. The drain valve is usually made up of a drain nozzle mounted on the bottom of the cistern and an overflow pipe that can be adjusted in stroke. In its closed position, the overflow pipe closes a flow passage through the drain connection. By pressing a pushbutton on the user side, the overflow pipe can be lifted into its open position, in which a quantity of flush water can flow out of the drain connection of the toilet cistern. In a conventional toilet cistern, the push button is in operative connection with the overflow pipe via a mechanical linkage.

Aus der EP 1 719 846 A2 ist ferner eine gattungsgemäße Ablaufgarnitur bekannt, bei der der Drucktaster nicht über ein mechanisches Gestänge, sondern über ein Pneumatiksystem mit dem Überlaufrohr in Verbindung ist. Das Pneumatiksystem weist einem am Drucktaster positionierten ersten Faltenbalg auf, der über eine Pneumatikleitung mit einem am Überlaufrohr positionierten zweiten Faltenbalg verbunden ist. Bei einer Druckbetätigung des Drucktasters wird der erste Faltenbalg komprimiert und somit ein Überdruck erzeugt, der auf den zweiten Faltenbalg beaufschlagbar ist. Durch die Überdruck-Beaufschlagung expandiert der zweite Faltenbalg, wodurch das Überlaufrohr in seine Offenstellung verstellt wird. Das obige Pneumatiksystem ist sowohl bauraumintensiv als auch bauteilintensiv ausgeführt. Die Realisierung des Pneumatiksystems ist daher mit einem hohen Kostenaufwand verbunden sowie montagetechnisch aufwendig durchzuführen.From the EP 1 719 846 A2 a generic drain fitting is also known in which the pushbutton is not connected to the overflow pipe via a mechanical linkage, but via a pneumatic system. The pneumatic system has a first bellows positioned on the push button, which is connected via a pneumatic line to a second bellows positioned on the overflow pipe. When the push button is pressed, the first bellows is compressed and an overpressure is thus generated, which can be applied to the second bellows. When the overpressure is applied, the second bellows expands, whereby the overflow pipe is moved into its open position. The above pneumatic system is both space-consuming and component-intensive. The implementation of the pneumatic system is therefore associated with high costs and is complex to carry out in terms of assembly.

Die Aufgabe der Erfindung besteht darin, eine Ablaufgarnitur für einen WC-Spülkasten bereitzustellen, die im Vergleich zum Stand der Technik bauraumreduziert sowie bauteilreduziert realisierbar ist.The object of the invention is to provide a drain fitting for a toilet cistern which, compared to the prior art, can be implemented in a reduced space and in components.

Die Aufgabe ist durch die Merkmale des Patentanspruches 1 gelöst. Bevorzugte Weiterbildungen der Erfindung sind in den Unteransprüchen offenbart.The object is achieved by the features of claim 1. Preferred developments of the invention are disclosed in the subclaims.

In Abkehr vom obigen Stand der Technik wird gemäß dem kennzeichnenden Teil des Patentanspruches 1 im Pneumatiksystem auf einen Faltenbalg verzichtet, der bei einer Überdruck-Beaufschlagung das Überlaufrohr hubverstellt. Vielmehr weist das erfindungsgemäße Pneumatiksystem genau ein pneumatisches Stellglied auf, das zur Hubverstellung des Überlaufrohres mit einem Unterdruck beaufschlagbar ist. Die Ablaufgarnitur weist zudem eine Unterdruckeinheit auf, die mit dem pneumatischen Stellglied strömungstechnisch verbunden ist. Bei einer nutzerseitigen Aktivierung erzeugt die Unterdruckeinheit einen auf das pneumatische Stellglied wirkenden Unterdruck, um eine Hubverstellung des Überlaufrohres durchzuführen.In contrast to the above prior art, according to the characterizing part of claim 1, a bellows is dispensed with in the pneumatic system, which adjusts the stroke of the overflow pipe when overpressure is applied. Rather, the pneumatic system according to the invention has precisely one pneumatic actuator which can be subjected to a negative pressure to adjust the stroke of the overflow pipe. The drain fitting also has a vacuum unit that is fluidically connected to the pneumatic actuator. When activated by the user, the negative pressure unit generates negative pressure acting on the pneumatic actuator in order to adjust the stroke of the overflow pipe.

Das pneumatische System kann als ein Faltenbalg, eine Kolben-Zylinder-Einheit oder als ein Membran-Hubsystem realisiert sein. Das Membran-Hubsystem kann beispielhaft zumindest eine mit Unterdruck beaufschlagbare Arbeitskammer aufweisen, die von einer verformbaren Membran begrenzt ist. Die verformbare Membran kann am Überlaufrohr angebunden sein. Bei einer Unterdruck-Beaufschlagung der Arbeitskammer kann sich die Membran verformen und entsprechend das Überlaufrohr hubverstellen. Im Hinblick auf eine besonders einfache sowie funktionsfähige Ausführung kann das pneumatische Stellglied ein Faltenbalg sein, der sich bei einer Unterdruck-Beaufschlagung ziehharmonikaartig zusammenzieht und sich bei einer Unterdruck-Entlastung ziehharmonikaartig auseinanderzieht (das heißt expandiert).The pneumatic system can be implemented as a bellows, a piston-cylinder unit or as a diaphragm lift system. The membrane lifting system can, for example, have at least one working chamber which can be acted upon by negative pressure and which is delimited by a deformable membrane. The deformable membrane can be connected to the overflow pipe. When the working chamber is subjected to negative pressure, the membrane can deform and the overflow pipe can be adjusted in stroke accordingly. With regard to a particularly simple and functional design, the pneumatic actuator can be a bellows which contracts like an accordion when a negative pressure is applied and, when the negative pressure is released, pulls apart (that is, expands) like an accordion.

In einer technischen Umsetzung kann die Unterdruckeinheit eine elektrisch ansteuerbare Vakuumpumpe oder eine wasserführende Unterdruckeinheit, das heißt eine Vakuumdüse oder eine Wasserstrahlpumpe sein. Die Vakuumdüse/Wasserstrahlpumpe kann über eine Unterdruckleitung mit dem pneumatischen Stellglied verbunden sein. Sofern die Vakuumdüse/Wasserstrahlpumpe wasserdurchströmt ist, wird daher Luft aus dem pneumatischen Stellglied abgesaugt, das heißt ein Unterdruck im pneumatischen Stellglied erzeugt.In a technical implementation, the negative pressure unit can be an electrically controllable vacuum pump or a water-carrying negative pressure unit, that is to say a vacuum nozzle or a water jet pump. The vacuum nozzle / water jet pump can be connected to the pneumatic actuator via a vacuum line. If water flows through the vacuum nozzle / water jet pump, air is therefore sucked out of the pneumatic actuator, that is, a negative pressure is generated in the pneumatic actuator.

Die obige wasserführende Unterdruckeinheit kann zwischen deren Wassereinlassseite und deren Wasserauslassseite nach Art einer Venturidüse eine Drosselstelle mit einer Strömungsquerschnitts-Verengung aufweisen. Die Unterdruckleitung kann bevorzugt an der Drosselstelle in den Strömungskanal der Unterdruckeinheit münden.The above water-carrying negative pressure unit can have a throttle point with a flow cross-section constriction between its water inlet side and its water outlet side in the manner of a Venturi nozzle. The vacuum line can preferably open into the flow channel of the vacuum unit at the throttle point.

Eine bauraumreduzierte sowie kompakte Anordnung des erfindungsgemäßen Pneumatiksystems ist von Vorteil. Vor diesem Hintergrund kann das pneumatische Stellglied (das heißt zum Beispiel der Faltenbalg) in der Ablaufgarnitur-Hochrichtung insbesondere in Flucht oberhalb des Überlaufrohrs angeordnet sein. Das pneumatische Stellglied kann bevorzugt über ein starres Verbindungselement am Überlaufrohr angebunden sein, das zum Beispiel koaxial das Überlaufrohr nach oben verlängert. Alternativ und/oder zusätzlich kann in der Ablaufgarnitur-Hochrichtung betrachtet die Unterdruckeinheit insbesondere in Flucht oberhalb des pneumatischen Stellglieds angeordnet sein, wodurch eine besonders bauraumreduzierte Ausführung des Pneumatiksystems erzielt wird.A compact and space-reduced arrangement of the pneumatic system according to the invention is advantageous. Against this background, the pneumatic actuator (that is, for example, the bellows) can be arranged in the vertical direction of the drain fitting, in particular in alignment above the overflow pipe. The pneumatic actuator can preferably be connected to the overflow pipe via a rigid connecting element which, for example, coaxially extends the overflow pipe upwards. Alternatively and / or additionally, viewed in the vertical direction of the drain fitting, the vacuum unit can be arranged in particular in alignment above the pneumatic actuator, whereby a particularly space-saving design of the pneumatic system is achieved.

Die wasserführende Unterdruckeinheit kann an ihrer Wassereinlassseite an einer Steuerleitung angeschlossen sein, die mit dem Wasserversorgungsnetz verbindbar ist. Bevorzugt kann die Steuerleitung von einer zu einem Füllventil des WC-Spülkastens führenden Versorgungsleitung abzweigen. In diesem Fall wird der ohnehin vorhandene Leitungsdruck für die UnterdruckErzeugung in der Unterdruckeinheit genutzt, ohne dass eine zusätzliche Fremdenergie (zum Beispiel die Druckbetätigung des Nutzers oder elektrische Energie) erforderlich wäre. Die wasserführende Unterdruckeinheit kann mit ihrer Wasserauslassseite direkt in den Innenraum des WC-Spülkastens münden.The water-carrying negative pressure unit can be connected on its water inlet side to a control line which can be connected to the water supply network. The control line can preferably branch off from a supply line leading to a filling valve of the toilet cistern. In this case, the line pressure, which is already present, is used to generate the negative pressure in the negative pressure unit without the need for additional external energy (for example, pressure actuation by the user or electrical energy). The water-bearing The water outlet side of the vacuum unit can open directly into the interior of the toilet cistern.

Die obige Ausführungsvariante ist insbesondere bei einer WC-Reparaturmaßnahme von Vorteil, bei der zur Vorbereitung die Wasserzuleitung zum WC-Spülkasten an einem Eckventil abgesperrt wird. In diesem Fall ist die Wasserversorgung zum WC-Spülkasten sowie zur Unterdruckeinheit unterbrochen. Bei einem herkömmlichen WC-Spülkasten, bei dem der Drucktaster über ein mechanisches Gestänge mit dem Ablaufventil verbunden ist, muss der Installateur vor Reparatur-Beginn den WC-Spülkasten entleeren, um bei einer unbeabsichtigten Drucktaster-Betätigung einen Wasserauslauf aus dem WC-Spülkasten zu vermeiden.The above variant is particularly advantageous for a toilet repair measure in which the water supply line to the toilet cistern is shut off at a corner valve in preparation. In this case, the water supply to the toilet cistern and to the vacuum unit is interrupted. In the case of a conventional toilet cistern, in which the push button is connected to the drain valve via a mechanical linkage, the fitter must empty the toilet cistern before starting the repair in order to prevent water from leaking out of the toilet cistern if the push button is unintentionally operated .

Erfindungsgemäß kann eine solche vorsorgliche Entleerung des WC-Spülkastens aus folgendem Grund wegfallen: Aufgrund der Eckventil-Absperrung kann nämlich kein Wasser durch die Steuerleitung geführt werden, so dass die Unterdruckeinheit keinen Unterdruck erzeugen kann. Das Ablaufventil bleibt also auch bei einer unbeabsichtigten Betätigung des Drucktasters zuverlässig geschlossen.According to the invention, such a preventive emptying of the toilet cistern can be omitted for the following reason: Because of the angle valve shut-off, no water can be passed through the control line, so that the negative pressure unit cannot generate negative pressure. The drain valve thus remains reliably closed even if the push button is unintentionally actuated.

Wie bereits oben erwähnt, kann die Unterdruckeinheit nutzerseitig aktiviert werden. Im Falle einer wasserführenden Unterdruckeinheit kann hierzu in der zur Unterdruckeinheit führenden Steuerleitung, das heißt stromauf der wasserführenden Unterdruckeinheit ein nutzerseitig betätigbares Steuerventil angeordnet sein. Durch eine nutzerseitige Betätigung des Steuerventils kann der durch die Unterdruckeinheit geführte Wasser-Volumenstrom eingestellt werden, der wiederum mit dem in der Unterdruckeinheit erzeugten Unterdruck korreliert. Beispielhaft kann das Steuerventil ein zeitgesteuertes Betätigungsventil, zum Beispiel ein sogenanntes Selbstschlussventil sein.As already mentioned above, the vacuum unit can be activated by the user. In the case of a water-carrying negative pressure unit, a control valve that can be operated by the user can be arranged for this purpose in the control line leading to the negative pressure unit, that is to say upstream of the water-carrying negative pressure unit. By actuating the control valve on the user side, the water volume flow guided through the negative pressure unit can be set, which in turn correlates with the negative pressure generated in the negative pressure unit. For example, the control valve can be a time-controlled actuation valve, for example a so-called self-closing valve.

In einer technischen Umsetzung kann das Steuerventil einen, in einem Ventilgehäuse hubverstellbaren Steuerkolben aufweisen. Der Steuerkolben kann mittels zumindest eines nutzerseitig bedienbaren Drucktasters verstellt werden. In seiner nicht betätigten Lage ist der Steuerkolben in eine Geschlossenstellung federvorgespannt, in der ein Steuerkolben-Ventilteller in Dichtanlage mit einem gehäusenfesten Ventilsitz ist und dadurch ein Strömungsweg durch das Steuerventil geschlossen ist. Bei einer Druckbetätigung des Drucktasters über einen Tastenhubweg wird der Steuerkolben entgegen der Federvorspannkraft in seine Offenstellung verstellt. In der Steuerkolben-Offenstellung ist der Strömungsweg durch das Steuerventil freigegeben, wodurch die wasserführende Unterdruckeinheit mit Wasser durchströmt ist. Bei einer Druckentlastung des Drucktasters wird dagegen der Steuerkolben unter Wirkung der Federvorspannkraft über einen Rückstellhubweg wieder in seine Geschlossenstellung rückgestellt.In a technical implementation, the control valve can have a control piston which can be stroke-adjustable in a valve housing. The control piston can be on the user side by means of at least one operated pushbutton can be adjusted. In its non-actuated position, the control piston is spring-preloaded into a closed position in which a control piston valve plate is in sealing contact with a valve seat fixed to the housing and a flow path through the control valve is closed as a result. When the push button is pressed over a stroke of the key, the control piston is moved into its open position against the spring preload force. In the control piston open position, the flow path through the control valve is released, so that water flows through the water-bearing negative pressure unit. When the pressure is released from the pushbutton, however, the control piston is returned to its closed position via a return stroke under the action of the spring preloading force.

Die Länge des obigen Tastenhubweges des Drucktasters korreliert mit einem Rückstell-Zeitintervall, innerhalb dem der Steuerkolben nach einer Drucktaster-Entlastung wieder in seine Geschlossenstellung rückgestellt wird. Innerhalb des Rückstell-Zeitintervalls ist die wasserführende Unterdruckeinheit mit dem Wasservolumenstrom durchströmt und wird ein Unterdruck erzeugt, der auf das pneumatische Stellglied wirkt. Das heißt, dass die Tastenhubweg-Länge einen unmittelbaren Einfluss auf die aus dem WC-Spülkasten ausströmende Spülwassermenge hat. Zur Einstellung eines maximal möglichen Tastenhubweges des Drucktasters und damit zur Einstellung einer ausströmbaren Spülwassermenge kann dem nutzerseitig bedienbaren Drucktaster ein Hubeinstellglied zugeordnet sein, der den maximalen Tastenhubweg des Drucktasters und somit auch das Rückstell-Zeitintervall einstellt.The length of the above key stroke of the push button correlates with a reset time interval within which the control piston is returned to its closed position after the push button has been released. Within the reset time interval, the water-carrying negative pressure unit is traversed by the water volume flow and a negative pressure is generated which acts on the pneumatic actuator. This means that the length of the key stroke has a direct influence on the amount of flush water flowing out of the toilet cistern. To set a maximum possible key stroke of the push button and thus to set the amount of flush water that can flow out, the user-operated push button can be assigned a stroke adjusting member that sets the maximum key stroke of the push button and thus also the reset time interval.

In einer technischen Ausführung kann die Ablaufgarnitur einen ersten Drucktaster, bei dessen Betätigung eine große Spülwassermenge aus dem WC-Spülkasten ausströmt, und einen zweiten Drucktaster aufweisen, bei dessen Betätigung eine kleine Spülwassermenge aus dem WC-Spülkasten ausströmt. Je nach Betätigung des ersten oder zweiten Drucktasters kann somit der Nutzer die Spülwassermenge festlegen.In a technical embodiment, the drain fitting can have a first push button, when actuated a large amount of flush water flows out of the toilet cistern, and a second push button, when actuated a small amount of flush water flows out of the toilet cistern. Depending on the actuation of the first or second push button, the user can determine the amount of flush water.

Die beiden Drucktaster können kraftübertragend, insbesondere zum Beispiel unter Zwischenschaltung einer Quertraverse, am Steuerkolben angebunden sein, und zwar so, dass bei der Druckbetätigung des ersten Drucktasters der zweite Drucktaster in seiner Ruhelage verbleibt. Der von einem der Drucktaster zurückgelegte Tastenhubweg ist somit identisch mit dem vom Steuerkolben zurückgelegten Kolbenhubweg. Bevorzugt ist jedem der beiden Drucktaster jeweils ein Hubeinstellglied zugeordnet, mit deren Hilfe die maximal möglichen Tastenhubwege des ersten und zweiten Drucktasters unabhängig voneinander einstellbar sind. Durch ein solches Steuerventil können unterschiedliche Spülwassermengen variabel eingestellt werden.The two pushbuttons can be connected to the control piston in a force-transmitting manner, in particular for example with the interposition of a cross member, in such a way that the second pushbutton remains in its rest position when the first pushbutton is pressed. The key stroke covered by one of the pushbuttons is thus identical to the piston stroke covered by the control piston. Preferably, each of the two pushbuttons is assigned a stroke adjustment member, with the aid of which the maximum possible stroke travel of the first and second pushbuttons can be set independently of one another. With such a control valve, different amounts of flushing water can be set variably.

Die vorstehend erläuterten vorteilhaften Aus- und/oder Weiterbildungen können - außer zum Beispiel in den Fällen eindeutiger Abhängigkeiten oder unvereinbarer Alternativen - einzeln oder aber auch in beliebiger Kombination miteinander zur Anwendung kommen.The advantageous training and / or further developments explained above can - except for example in the cases of clear dependencies or incompatible alternatives - be used individually or in any combination with one another.

Die Erfindung und ihre vorteilhaften Aus- und Weiterbildungen sowie deren Vorteile werden nachfolgend anhand von Zeichnungen näher erläutert.The invention and its advantageous designs and developments as well as their advantages are explained in more detail below with reference to drawings.

Es zeigen:

Figur 1
in einer grob schematischen Teilschnittansicht einen WC-Spülkasten mit einem Füllventil und einem Ablaufventil;
Figur 2
in einer Detailansicht eine Baueinheit aus einer Vakuumdüse und einem Faltenbalg;
Figur 3
eine Schnittdarstellung entlang der Schnittebene A-A aus der Figur 1;
Figur 4 und 5
jeweils Ansichten entsprechend der Figur 3 bei betätigtem ersten Drucktaster und bei betätigtem zweiten Drucktaster;
Figuren 6 und 7
jeweils Ansichten, die das Pneumatiksystem bei einer UnterdruckBeaufschlagung des Faltenbalgs zeigen;
Figur 8
ein Pneumatiksystem des WC-Spülkastens gemäß einem weiteren Ausführungsbeispiel;
Figuren 9 und 10
Ansichten eines Ausführungsbeispiels mit einem dritten Drucktaster.
Show it:
Figure 1
a roughly schematic partial sectional view of a toilet cistern with a filling valve and a drain valve;
Figure 2
a detailed view of a structural unit comprising a vacuum nozzle and a bellows;
Figure 3
a sectional view along the sectional plane AA from FIG Figure 1 ;
Figures 4 and 5
respectively views according to the Figure 3 when the first push button is actuated and when the second push button is actuated;
Figures 6 and 7
in each case views showing the pneumatic system when the bellows is subjected to negative pressure;
Figure 8
a pneumatic system of the toilet cistern according to a further embodiment;
Figures 9 and 10
Views of an embodiment with a third push button.

In der Figur 1 ist eine in einem WC-Spülkasten 1 verbaute Ablaufgarnitur mit zugehörigem Pneumatiksystem 21 gezeigt. Die Ablaufgarnitur weist am Spülkastenboden einen Ablaufstutzen 5 auf, der in nicht gezeigter Weise in Strömungsverbindung mit einem WC-Becken ist. Der Ablaufstutzen 5 liegt mit einer radial ausgeweiteten umlaufenden Ringschulter 7 auf dem Öffnungsrandbereich einer bodenseitigen Auslassöffnung des Spülkasten-Bodens auf. Die Ringschulter 7 des Ablaufstutzens 5 ist nach oben mit einer daran angeformten umlaufenden Gehäusewand 9 verlängert, in der Durchflussöffnungen 11 ausgebildet sind, die in Umfangsrichtung gleichmäßig verteilt sind. Radial innerhalb sowie koaxial zu der Gehäusewand 9 ist ein hubverstellbares Überlaufrohr 13 angeordnet, das mit seinem radial äußeren Ventilteller 15 auf einem an der Ringschulter 7 ausgebildeten Ventilsitz 17 flüssigkeitsdicht aufliegt. Das Umlaufrohr 13 bildet zusammen mit dem Ablaufstutzen 5 ein Ablaufventil 19, das über das Pneumatiksystem 21 von Drucktastern 23, 25 betätigbar ist, die in der Fig. 1 von einer Dekorplatte 26 umgrenzt sind und in einer Gebäudewand 28 installiert sind. Bei einer Druckbetätigung der Drucktaster 23, 25 wird das Umlaufrohr 13 mittels des Pneumatiksystems 21 von einer in der Figur 1 gezeigten Geschlossenstellung in eine Offenstellung (Figur 6 und 7) hubverstellt.In the Figure 1 a waste set installed in a toilet cistern 1 with an associated pneumatic system 21 is shown. The drain fitting has a drain connector 5 on the cistern floor, which is in flow connection with a toilet bowl in a manner not shown. The drain connection 5 rests with a radially widened circumferential annular shoulder 7 on the opening edge region of an outlet opening on the bottom of the cistern floor. The annular shoulder 7 of the drainage connection 5 is extended upwards with a circumferential housing wall 9 formed thereon, in which flow openings 11 are formed which are evenly distributed in the circumferential direction. A stroke-adjustable overflow pipe 13 is arranged radially inside and coaxially to the housing wall 9 and rests with its radially outer valve disk 15 on a valve seat 17 formed on the annular shoulder 7 in a liquid-tight manner. The circulating pipe 13 forms together with the drain connection 5 a drain valve 19, which can be actuated via the pneumatic system 21 of push buttons 23, 25, which in the Fig. 1 are delimited by a decorative plate 26 and installed in a building wall 28. When the pushbuttons 23, 25 are pressed, the circulation pipe 13 is moved by means of the pneumatic system 21 from one in the Figure 1 shown closed position into an open position ( Figures 6 and 7 ) stroke adjusted.

Im WC-Spülkasten 1 ist außerdem ein Füllventil verbaut, mit dem der WC-Spülkasten 1 bis auf einen vorgegebenen Füllstand mit Wasser gefüllt wird. Das Füllventil ist einlassseitig an einer zum Wasserversorgungsnetz führenden Versorgungsleitung 29 angeschlossen. Zudem ist das Füllventil mittels eines Schwimmers 32 gesteuert, der an einem Einlaufrohr 34 höhenverstellbar angeordnet ist.A filling valve is also installed in the toilet cistern 1 with which the toilet cistern 1 is filled with water up to a predetermined level. On the inlet side, the filling valve is connected to a supply line 29 leading to the water supply network. Besides, that is Filling valve controlled by means of a float 32, which is arranged on an inlet pipe 34 to be adjustable in height.

Wie aus der Figur 1 oder 2 weiter hervorgeht, weist das Pneumatiksystem 21 als pneumatisches Stellglied 31 einen Faltenbalg sowie als Unterdruckeinheit eine Vakuumdüse 33 auf. Die Vakuumdüse 33 ist nach Art einer Venturidüse aufgebaut und einlassseitig an einer Steuerleitung 35 angeschlossen, die von der Versorgungsleitung 29 abzweigt. In der Steuerleitung 35 ist ein Steuerventil 43 angeordnet, das über die nutzerseitig bedienbaren Drucktaster 23, 25 betätigbar ist. Bei einer Drucktaster-Betätigung wird im Steuerventil 43 ein Wasser-Strömungsweg vom Versorgungsnetz zur Vakuumdüse 33 geöffnet und diese mit einem Wasser-Volumenstrom ṁ (Fig. 3 oder 6) durchströmt. Auf diese Weise wird in der Unterdruckleitung 37 ein Unterdruck erzeugt, mit dem der Faltenbalg 31 zusammengezogen wird.As from the Figure 1 or 2 It can also be seen that the pneumatic system 21 has a bellows as the pneumatic actuator 31 and a vacuum nozzle 33 as the negative pressure unit. The vacuum nozzle 33 is constructed in the manner of a Venturi nozzle and is connected on the inlet side to a control line 35 which branches off from the supply line 29. A control valve 43 is arranged in the control line 35 and can be actuated via the pushbuttons 23, 25 which can be operated by the user. When the push button is actuated, a water flow path from the supply network to the vacuum nozzle 33 is opened in the control valve 43 and this is connected to a water volume flow ṁ ( Fig. 3 or 6th ) flows through. In this way, a negative pressure is generated in the negative pressure line 37, with which the bellows 31 is drawn together.

Auslassseitig mündet die Vakuumdüse 33 in den Innenraum des WC-Spülkastens 1. Die Vakuumdüse 33 weist zwischen ihrer Wassereinlass- und Wasserauslassseite eine Drosselstelle mit einer Strömungsquerschnitts-Verengung auf, an der eine Unterdruckleitung 37 in den Düsenkanal der Vakuumdüse 33 einmündet. Die Vakuumdüse 33 und der Faltenbalg 31 sind unter Bildung einer Baueinheit B (Fig. 2) unmittelbar aneinander angebunden. Hierzu weist die Vakuumdüse 33 in der Figur 2 einen Anschlussstutzen 39 auf, durch den die Unterdruckleitung 37 führt. Auf den Anschlussstutzen 39 der Vakuumdüse 33 ist ein Rohransatz 41 des Faltenbalgs 31 aufgeschoben und gegebenenfalls mittels einer nicht gezeigten Befestigungsschelle daran fixiert. Der Faltenbalg 31 ist in der Fig. 2 mit seinem vom Rohransatz 41 abgewandten Faltenbalg-Boden 45 an einer Verbindungsstange 47 angekoppelt, die wiederum am oberen Ende des Überlaufrohrs 13 befestigt ist.On the outlet side, the vacuum nozzle 33 opens into the interior of the toilet cistern 1. The vacuum nozzle 33 has a throttle point with a flow cross-sectional constriction between its water inlet and water outlet side, at which a vacuum line 37 opens into the nozzle channel of the vacuum nozzle 33. The vacuum nozzle 33 and the bellows 31 are to form a unit B ( Fig. 2 ) directly connected to each other. For this purpose, the vacuum nozzle 33 in the Figure 2 a connection piece 39 through which the vacuum line 37 leads. A pipe extension 41 of the bellows 31 is pushed onto the connecting piece 39 of the vacuum nozzle 33 and optionally fixed to it by means of a fastening clip, not shown. The bellows 31 is in the Fig. 2 with its bellows base 45 facing away from the pipe extension 41 is coupled to a connecting rod 47 which in turn is fastened to the upper end of the overflow pipe 13.

Das in der Figur 3 gezeigte Steuerventil 43 bildet zusammen mit einem Tastengehäuse 49, in dem die beiden Drucktaster 23, 25 angeordnet sind, ebenfalls eine Baueinheit. In der Figur 3 weist das Steuerventil 43 einen in einem Ventilgehäuse 51 hubverstellbaren Steuerkolben 53 auf. Der Steuerkolben 53 ist unter Zwischenschaltung einer Quertraverse 55 kraftübertragend mit den beiden Drucktastern 23, 25 verbunden. In der, in der Figur 3 gezeigten Nichtgebrauchslage ist der Steuerkolben 53 mittels einer Spiralfeder 57 in eine Geschlossenstellung federvorgespannt. In der in der Figur 3 gezeigten Geschlossenstellung ist der Steuerkolben 53 mit seinem Ventilteller 59 in Dichtanlage mit einem gehäusefesten Ventilsitz 61, wodurch der Strömungsweg durch das Steuerventil 43 geschlossen ist.That in the Figure 3 The control valve 43 shown, together with a button housing 49 in which the two pushbuttons 23, 25 are arranged, also forms a structural unit. In the Figure 3 the control valve 43 has a control piston 53 which can be lifted in a valve housing 51 on. The control piston 53 is connected to the two pushbuttons 23, 25 in a force-transmitting manner with the interposition of a cross member 55. In the, in the Figure 3 In the non-use position shown, the control piston 53 is spring-preloaded into a closed position by means of a spiral spring 57. In the in the Figure 3 The closed position shown is the control piston 53 with its valve plate 59 in sealing contact with a valve seat 61 fixed to the housing, whereby the flow path through the control valve 43 is closed.

Die ersten und zweiten Drucktaster 23, 25 sind über maximal mögliche Tastenhubwege h1, h2 entgegen der von der Spiralfeder 57 erzeugten Federvorspannkraft in eine Offenstellung verstellbar (Figur 4 oder 5). In der Offenstellung ist der Strömungsweg durch das Steuerventil 43 freigegeben. Bei einer Druckentlastung des jeweils gedrückten Drucktasters 23, 25 wird der Drucktaster 23, 25 unter Wirkung der Federvorspannkraft der Spiralfeder 57 wieder in seine Geschlossenstellung rückgestellt.The first and second pushbuttons 23, 25 can be adjusted into an open position over the maximum possible key travel h 1 , h 2 against the spring preload force generated by the spiral spring 57 ( Figure 4 or 5 ). In the open position, the flow path through the control valve 43 is released. When the pressure of the respective pressed pushbutton 23, 25 is released, the pushbutton 23, 25 is returned to its closed position under the action of the spring biasing force of the spiral spring 57.

Zur Einstellung der oben erwähnten Tastenhubwege h1, h2 weist das Steuerventil 43 zwei Hubeinstellglieder 63, 65 auf, die in einer Hubrichtung verstellbar im Tastengehäuse 49 angeordnet sind. Jedes der Hubeinstellglieder 63, 65 ist jeweils einem der Drucktaster 23, 25 zugeordnet. Mit Hilfe der Hubeinstellglieder 63, 65 kann ein maximal möglicher Tastenhubweg h1, h2 des Drucktasters 23, 25 eingestellt werden. Die Hubeinstellglieder 63, 65 wirken als Tiefenanschläge, die den Hubweg des jeweiligen Drucktasters 23, 25 begrenzen.To set the above-mentioned key stroke paths h 1 , h 2 , the control valve 43 has two stroke adjusting members 63, 65 which are arranged in the key housing 49 so as to be adjustable in one stroke direction. Each of the stroke adjustment members 63, 65 is assigned to one of the pushbuttons 23, 25. With the aid of the stroke adjusting members 63, 65, a maximum possible key stroke h 1 , h 2 of the pushbutton 23, 25 can be set. The stroke adjustment members 63, 65 act as depth stops which limit the stroke path of the respective pushbutton 23, 25.

Bei einer nach der Drucktaster-Betätigung erfolgenden Drucktaster-Entlastung stellt sich der Steuerkolben 53 unter Federkraft-Wirkung selbststätig wieder in seine Geschlossenstellung zurück, und zwar innerhalb eines Rückstell-Zeitintervalls. Innerhalb des Rückstell-Zeitintervalls bleibt der Strömungsweg durch das Steuerventil 43 weiter offen, so dass weiter ein Wasservolumenstrom ṁ durch die Vakuumdüse 33 geleitet wird und dadurch ein Unterdruck erzeugt wird. Die Länge des Rückstell-Zeitintervalls korreliert dabei mit einer Tastenhubweg-Länge. Das heißt, dass bei einer großen Tastenhubweg-Länge die Rückstellung des Drucktasters 23, 25 länger dauert als bei einer kürzeren Tastenhubweg-Länge. Entsprechend kann bei einer großen Tastenhubweg-Länge eine größere Spülwassermenge aus dem WC-Spülkasten 1 ausströmen als bei einer kleineren Tastenhubweg-Länge.When the pushbutton is released after the pushbutton has been actuated, the control piston 53 automatically returns to its closed position under the action of a spring force, specifically within a reset time interval. Within the reset time interval, the flow path through the control valve 43 remains open, so that a water volume flow ṁ continues to be passed through the vacuum nozzle 33 and a negative pressure is thereby generated. The length of the reset time interval correlates with a key travel length. This means that with a large key stroke length, the return of the push button 23, 25 is longer takes longer than with a shorter key travel length. Correspondingly, with a large key stroke length, a larger amount of flush water can flow out of the toilet cistern 1 than with a smaller key stroke length.

Durch voneinander separate Einstellungen der Hubeinstellglieder 63, 65 kann somit jedem der Drucktaster 23, 25 jeweils eine eigene, aus dem WC-Spülkasten 1 ausströmende Spülwassermenge zugeordnet werden. Beispielhaft kann bei Betätigung des ersten Drucktasters 23 eine kleine Spülwassermenge aus dem WC-Spülkasten 1 ausströmen. Demgegenüber kann bei Betätigung des zweiten Drucktasters 25 eine größere Spülwassermenge aus dem WC-Spülkasten 1 ausströmen.By setting the stroke adjusting members 63, 65 separately from one another, each of the pushbuttons 23, 25 can be assigned its own amount of flushing water flowing out of the toilet cistern 1. For example, when the first push button 23 is actuated, a small amount of flush water can flow out of the toilet cistern 1. In contrast, when the second pushbutton 25 is actuated, a larger amount of flush water can flow out of the toilet cistern 1.

Im Hinblick auf eine kompakte, bauraumgünstige Ausgestaltung des Pneumatiksystems 21 ist gemäß den Figuren der Faltenbalg 31 in der Ablaufgarnitur-Hochrichtung in Flucht oberhalb des Überlaufrohrs 31 positioniert. Zudem ist auch die Vakuumdüse 33 in etwa in Flucht oberhalb des Faltenbalgs 31 positioniert.With regard to a compact, space-saving design of the pneumatic system 21, the bellows 31 is positioned in the vertical direction of the drain fitting in alignment above the overflow pipe 31 according to the figures. In addition, the vacuum nozzle 33 is also positioned approximately in alignment above the bellows 31.

In der Figur 8 ist eine Weiterentwicklung des in den vorangegangenen Figuren gezeigten Pneumatiksystems 21 gezeigt. Im Unterschied zu den vorangegangenen Figuren ist in der Figur 8 zusätzlich eine Faltenbalg-Führung 67 vorgesehen, um ein einwandfreies Zusammenziehen und Auseinanderziehen des Faltenbalgs 31 zu gewährleisten. Die Faltenbalg-Führung 67 weist ein hohlzylindrisches, topfartiges Faltenbalg-Gehäuse 69 auf, das zu einer Gehäusesachse G rotationssymmetrisch ausgebildet ist und mit seinem Topfboden 71 an der Vakuumdüse 33 befestigt ist. Am Außenumfang des Faltenbalg-Gehäuses 69 sind Führungskanäle 73 angeformt, in denen Führungsstifte 75 achsparallel zur Gehäuseachse G geführt sind. Die Führungsstifte 75 sind über Querstege 77 an der Verbindungsstange 47 befestigt.In the Figure 8 a further development of the pneumatic system 21 shown in the previous figures is shown. In contrast to the previous figures, the Figure 8 a bellows guide 67 is additionally provided in order to ensure that the bellows 31 can be drawn together and pulled apart properly. The bellows guide 67 has a hollow cylindrical, pot-like bellows housing 69 which is designed to be rotationally symmetrical with respect to a housing axis G and which is attached to the vacuum nozzle 33 with its pot bottom 71. On the outer circumference of the bellows housing 69, guide channels 73 are formed, in which guide pins 75 are guided axially parallel to the housing axis G. The guide pins 75 are fastened to the connecting rod 47 via transverse webs 77.

In den Figuren 9 und 10 ist im Unterschied zu den vorangegangenen Ausführungsbeispielen ein zusätzlicher dritter Drucktaster 26 bereitgestellt, der zusammen mit den beiden anderen Drucktastern 23, 25 von der Dekorplatte 30 umgrenzt ist. Bei einer Druckbetätigung des dritten Drucktasters 26 kann eine mittlere Spülwassermenge aus dem WC-Spülkasten 1 ausströmen. Der dritte Drucktaster 26 ist, wie auch die beiden anderen Drucktaster 23, 25, unter Zwischenschaltung der Quertraverse 55 kraftübertragend in Verbindung mit dem Steuerkolben 53. Zudem ist auch dem dritten Drucktaster 26 ein nicht gezeigtes Hubeinstellglied zugeordnet, mit dem der maximal mögliche Tastenhub des dritten Drucktasters 26 einstellbar ist.In the Figures 9 and 10 is in contrast to the previous embodiments, an additional third push button 26 is provided, which together with the other two push buttons 23, 25 is bounded by the decorative plate 30. When the third pushbutton 26 is pressed, an average amount of flush water can flow out of the toilet cistern 1. The third pushbutton 26, like the two other pushbuttons 23, 25, transmits force with the interposition of the cross member 55 in connection with the control piston 53. In addition, the third pushbutton 26 is also assigned a stroke setting element, not shown, with which the maximum possible stroke of the third Push button 26 is adjustable.

Wie aus der Figur 10 hervorgeht, ist jedem der Hubeinstellglieder ein Verstellrad 79 zugeordnet, das vom Nutzer drehbetätigbar ist. Mittels einer Drehbetätigung kann das jeweils zugeordnete Hubeinstellglied verstellt werden.As from the Figure 10 is apparent, each of the Hubeinstellglieder an adjusting wheel 79 is assigned, which can be rotated by the user. The respectively assigned stroke adjusting element can be adjusted by means of a rotary actuation.

BezugszeichenlisteList of reference symbols

11
WC-SpülkastenToilet cistern
55
AblaufstutzenDrain connection
77th
RingschulterRing shoulder
99
GehäusewandHousing wall
1111
DurchflussöffnungenFlow openings
1313
ÜberlaufrohrOverflow pipe
1515th
VentiltellerValve disc
1717th
VentilsitzValve seat
1919th
AblaufventilDrain valve
2121st
PneumatiksystemPneumatic system
23, 25, 2623, 25, 26
Drucktaster28 GebäudewandPush button 28 building wall
2929
Versorgungsleitungsupply line
3030th
DekorplatteDecorative panel
3131
FaltenbalgBellows
3232
Schwimmerswimmer
3333
VakuumdüseVacuum nozzle
3434
EinlaufrohrInlet pipe
3535
SteuerleitungControl line
3737
UnterdruckleitungVacuum line
3939
AnschlussstutzenConnection piece
4141
RohransatzPipe socket
4343
SteuerventilControl valve
4545
Faltenbalg-BodenBellows bottom
4747
VerbindungselementConnecting element
4949
TastengehäuseButton housing
5151
VentilgehäuseValve body
5353
SteuerkolbenControl piston
5555
QuertraverseCross member
5757
SpiralfederCoil spring
5959
Steuerkolben-VentiltellerControl piston valve disc
6161
gehäusefester Ventilsitzvalve seat fixed to the housing
63, 6563, 65
HubeinstellgliederStroke adjusters
ṁṁ
Wasser-VolumenstromWater volume flow
GG
GehäuseachseHousing axis
6767
Faltenbalg-FührungBellows guide
6969
Faltenbalg-GehäuseBellows housing
7171
TopfbodenPot bottom
7373
FührungskanäleGuide channels
7575
FührungsstifteGuide pins
7777
QuerstegeCrossbars
7979
VerstellräderAdjustment wheels

Claims (16)

  1. A drain fitting for a toilet flush tank (1), having a drain valve (19), which is constructed from a drain connection (5) mounted on the flush tank (1) and a stroke-adjustable pipe (13), which in its closed position closes a flow passage through the drain connection (5), and having a pneumatic actuator (31) with which, when pressure is applied, the pipe (13) can be moved into its open position, in which a volume of flushing water can flow from the drain connection (5) of the toilet flush tank (1), wherein for moving the pipe (13) into its open position with a stroke adjustment, the pneumatic actuator (31) can be subjected to a negative pressure, and wherein the drain fitting has an in particular water-conducting vacuum unit (33), which is connected to the pneumatic actuator (31) and, when activated by a user, generates a negative pressure acting on the pneumatic actuator (31), characterized in that the pipe (13) is an overflow pipe (13) .
  2. The drain fitting according to Claim 1, characterized in that the pneumatic actuator (31) is embodied as a bellows, as a piston-cylinder unit, or as a diaphragm lifting system, wherein the diaphragm lifting system has at least one working chamber capable of being subjected to negative pressure, which is delimited by a deformable diaphragm, which diaphragm is connected to the overflow pipe (13).
  3. The drain fitting according to Claim 1 or 2, characterized in that the vacuum unit (33) is a water-conducting vacuum nozzle or water jet pump, which is connected to the pneumatic actuator (31) by a vacuum line (37), and that with a water-conducting vacuum nozzle (33) or water jet pump, air can be suctioned out of the pneumatic actuator (31).
  4. The drain fitting according to Claim 3, characterized in that the vacuum unit (33) has a throttle point with a flow cross section constriction between its water inlet side and its water outlet side, and that the vacuum line (37) opens into the flow channel of the vacuum unit (33) at the throttle point.
  5. The drain fitting according to any one of the preceding claims, characterized in that the pneumatic actuator (31) contracts in a travel direction when negative pressure is applied, moving the overflow pipe (13) into the its open position with a stroke adjustment, and that the pneumatic actuator (31) expands when negative pressure is relieved, moving the overflow pipe (13) into its closed position with a stroke adjustment and in particular under the effect of gravity.
  6. The drain fitting according to any one of the preceding claims, characterized in that the pneumatic actuator (31) is arranged in the drain fitting vertical direction, in particular in alignment, above the overflow pipe (13), and that in particular the pneumatic actuator (31) is attached, in particular rigidly, to the overflow pipe (13) by means of a connection element (47) .
  7. The drain fitting according to Claim 6, characterized in that the vacuum unit (33) is arranged in the drain fitting vertical direction, in particular in alignment, above the pneumatic actuator (31).
  8. The drain fitting according to any one of Claims 3 to 7, characterized in that the water-conducting vacuum unit (33) is attached on its water inlet side to a control line (35) which is connectable to the water supply network.
  9. The drain fitting according to Claim 8, characterized in that a control valve (43) capable of being actuated by a user is arranged in the control line (35), and that the water volume flow (m) conducted through the vacuum unit (33), which correlates with the negative pressure generated in the vacuum unit (33), can be adjusted when the control valve (43) is actuated by a user.
  10. The drain fitting according to any one of the preceding claims, characterized in that the toilet flush tank (1) has a fill valve, which can be connected on the inlet side to the water supply network and via which the toilet flush tank (1) is filled with water.
  11. The drain fitting according to Claim 9 or 10, insofar as related to Claim 9, characterized in that the control valve (43) has a control piston (53) of which the stroke can be adjusted in a valve housing (51), which control piston can is movable by means of at least one user-operated push button (23, 25, 26) and is springpretensioned in a closed position, in which a control piston valve plate (59) abuts sealingly with a housingfixed valve seat (61) and closes a flow path through the control valve (43), and which control piston (53) is moved along a button travel path (h1, h2) against the spring pretensioning force into its open position in which the flow path through the control valve (43) is unblocked when the push button (23, 25, 26) is pressed, and is returned to its closed position under the action of the spring pretensioning force when the push button (23, 25, 26) is released.
  12. The drain fitting according to Claim 11, characterized in that the length of the button travel path correlates with the length of a reset time interval during which the control piston (53) is returned to its closed position after the push button is released, wherein the water volume flow (m) flows through the vacuum unit (33) and a negative pressure is generated during the reset time interval.
  13. The drain fitting according to Claim 12, characterized in that a stroke adjustment element (63, 65) is allocated to the user-operated push button (23, 25, 26) of the control valve (43), with which a maximum possible button travel path (h1, h2) of the push button (23, 25, 26), and thus the reset time interval, can be set.
  14. The drain fitting according to any one of Claims 11 to 13, characterized in that at least one first push button (23) is provided, upon actuation of which a small volume of flushing water flows from the toilet flush tank (1), and a second push button (25) is provided, upon actuation of which a large volume of flushing water flows from the toilet flush tank (1), and that in particular a third push button (26) is provided, upon actuation of which a medium volume of flushing water flows from the toilet flush tank (1).
  15. The drain fitting according to Claim 14, characterized in that the push buttons (23, 25, 26) are force-transmittingly connected to the control piston (53), in particular via interposition of a crosspiece (55), namely in such a way that when a push button (23) is pressed, the at least one further push button (25, 26) stays in its neutral position.
  16. The drain fitting according to Claim 14 or 15, characterized in that in each case a travel adjustment element (63, 65) is assigned to each of the push buttons (23, 25, 26), by means of which the maximum possible button travel paths (h1, h2) of the respective push buttons (23, 25, 26) are independently adjustable.
EP17761803.0A 2016-08-29 2017-08-29 Drain fitting for a wc flush tank Active EP3516124B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016010335.3A DE102016010335A1 (en) 2016-08-29 2016-08-29 Drain fitting for a toilet cistern
PCT/EP2017/001024 WO2018041400A1 (en) 2016-08-29 2017-08-29 Drain fitting for a wc flush tank

Publications (3)

Publication Number Publication Date
EP3516124A1 EP3516124A1 (en) 2019-07-31
EP3516124B1 true EP3516124B1 (en) 2020-08-26
EP3516124B8 EP3516124B8 (en) 2020-11-25

Family

ID=59791022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17761803.0A Active EP3516124B8 (en) 2016-08-29 2017-08-29 Drain fitting for a wc flush tank

Country Status (5)

Country Link
US (1) US10851531B2 (en)
EP (1) EP3516124B8 (en)
CN (1) CN109642423B (en)
DE (1) DE102016010335A1 (en)
WO (1) WO2018041400A1 (en)

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WO2021171937A1 (en) * 2020-02-28 2021-09-02 Toto株式会社 Cleaning water tank device and flushing toilet apparatus provided with same
EP4112828A4 (en) * 2020-02-28 2023-12-06 Toto Ltd. Wash water tank device and flush toilet device provided with same
US11371229B2 (en) * 2020-02-28 2022-06-28 Toto Ltd. Flush water tank apparatus and flush toilet apparatus provided with the same
CN113597493B (en) * 2020-02-28 2023-09-08 Toto株式会社 Flush tank device and flush toilet device provided with same
TWI838608B (en) * 2020-02-28 2024-04-11 日商Ｔｏｔｏ股份有限公司 Clean water tank device, and flush toilet device equipped with the same
DE102022108201A1 (en) * 2022-04-05 2023-10-05 Grohe Ag Sanitary facility with flushing function

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Also Published As

Publication number Publication date
US20190194922A1 (en) 2019-06-27
CN109642423B (en) 2021-05-07
DE102016010335A1 (en) 2018-03-01
US10851531B2 (en) 2020-12-01
EP3516124B8 (en) 2020-11-25
WO2018041400A1 (en) 2018-03-08
CN109642423A (en) 2019-04-16
EP3516124A1 (en) 2019-07-31

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