EP0293031B1 - Protecting device against damages caused by water for dish washing machines - Google Patents

Protecting device against damages caused by water for dish washing machines Download PDF

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Publication number
EP0293031B1
EP0293031B1 EP88200948A EP88200948A EP0293031B1 EP 0293031 B1 EP0293031 B1 EP 0293031B1 EP 88200948 A EP88200948 A EP 88200948A EP 88200948 A EP88200948 A EP 88200948A EP 0293031 B1 EP0293031 B1 EP 0293031B1
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EP
European Patent Office
Prior art keywords
hose
valve
water
level monitor
air
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.)
Expired - Lifetime
Application number
EP88200948A
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German (de)
French (fr)
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EP0293031A2 (en
EP0293031A3 (en
Inventor
Manfred Gumm
Josef Degel
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.)
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
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Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
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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
    • A47L15/421—Safety arrangements for preventing water damage
    • 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
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage

Definitions

  • valves can be used in a known manner on the faucet, which, for example, close when the back pressure is too low and thus when the hose bursts Keep damage small by automatically closing the valve on the tap.
  • Another known possibility is to connect the valve, which is necessary anyway for the water supply to the machine, directly to the tap via an electrical control line lying parallel to the water hose, that is, to connect it upstream of the water hose. In such a case, the water hose is only under pressure during the feed phase; the risk of water damage is greatly reduced from the outset.
  • the water escaping here can be captured in a leakage water trough and e.g.
  • a valve can be controlled via a float that separates the supply hose from the supply network on the network side.
  • a leak within the machine or the tubing can also be detected via the leakage water trough and the float.
  • a device of the type mentioned with a monitoring device for the rinse tank liquid level which consists of at least one operational and / or security level monitor, which is reached when it is reached of the normal filling level or a safety level in the rinsing container and causes the closing of a program-dependent, machine-specific shut-off valve.
  • the operating and / or safety level monitor is connected to the flushing tank via an air trap chamber.
  • the connecting hose connected to the enveloping hose is either connected to the air boiler or directly to the washing tank and that the level monitor causes the machine's own shut-off valve and the inlet valve on the shut-off valve to close.
  • the invention has for its object to ensure beyond the damage described in DE-A-36 04 673 that the machine switches off as safely and defined when reaching a maximum permissible level as in the case of leaks in the enveloping tube.
  • Solenoid valves are among the elements that can be considered to be very reliable. However, since these valves work on a line network that is not always without additives, e.g. Sand, is, a malfunction of such valves can not be completely excluded. Another object of the invention is to largely rule out damage from such faults.
  • the second level monitor which detects the maximum level and a damage in the inlet hose, can in turn be looped in with a control contact.
  • connection according to the invention between the enveloping hose on the one hand and the wind boiler or the safety level monitor on the other hand via the specially designed and routed line connection can be used to easily ensure regeneration of the machine function after an excessive water level and to prevent the machine from being switched on again after a defect in the inlet hose will. If the level in the rinsing tank is elevated, the safety level monitor is pressurized via the air boiler and the two air lines in this function and closes the valve. As soon as the excessive liquid level has dropped, the pressure at the safety level monitor drops again so that the valve opens. The machine function is now restored. If the inlet hose is defective, leakage water first penetrates into the connecting hose and from there into the two parallel air lines.
  • Fig. 1 shows a schematic representation of an overall view of the device according to the invention in connection with a dishwasher.
  • FIG. 2 shows details of a water connection with valves and details of the connection to the dishwasher and the dishwasher-side connection.
  • Fig. 3 shows a schematic representation of a commercially available water inlet made of molded plastic with a molded component.
  • the washing compartment 2 with its front door 3 is arranged in the housing 1 of a dishwasher.
  • the rinsing tank is equipped in a known manner with a sump 4, to which two air tanks 5 and 6 are connected.
  • the housing 1 On the bottom side, the housing 1 is provided with a collecting trough 7, which has a float 8 and a switch 9 assigned.
  • the wastewater pump assigned to the sump 4 is not shown here.
  • the level monitor 10 is connected to the wind boiler 5 and switches off the water supply when the working level 11 is reached.
  • the wind boiler 6 is connected via the air line 12 and the component 13 on the one hand to the connecting hose 14 and on the other hand via the air line 15 to the level monitor 16, which responds to the maximum permissible level 17.
  • the component 13 is arranged in the machine in such a way that the connection to the level monitor 16 both from the connecting hose 14 and from the air hose 12 is above the maximum permissible level 17.
  • connection unit 19 and the double valve 20 with the magnetic coils 21 and 22 are provided, which are connected by the hose lines 23, 24.
  • the tubing consists of an inlet hose 23, an enveloping hose 24 and a protective hose 25.
  • the inlet hose 23 is tightly connected to the double valve 20.
  • the enveloping tube 24 is fastened to the connection unit 19 in such a way that the closed space between the inlet tube 23 and the enveloping tube 24 has an air connection to the connecting tube 14.
  • the envelope tube 24 is enclosed by a protective tube 25 which is fastened to the connection unit 19 and the housing 26 of the valve 20.
  • the electrical wiring 27 is laid between the enveloping tube 24 and the protective tube 25.
  • the connection unit 19 has a recess for leading out the wiring 27, which are connected to control the magnetic coils 21 and 22 with the program control device and the level monitors 10 and 16 and the contact 9 of the float switch.
  • solenoids 21 and 22 are individually controlled, e.g. the valve associated with the coil 21 is opened when the main switch is actuated.
  • the valve associated with the coil 22 is switched as a function of the program control device and the level monitor 10.
  • the level monitor 16 is acted upon with a corresponding air pressure via the wind boiler 6 and the air lines 12, 15, which partly run in the component 13, so that it switches and the magnet coil independently of the level monitor 10 21 de-excited.
  • the corresponding valve part closes.
  • the pressure at the level monitor 16 drops, so that the valve 21 can open again.
  • the component 13 according to FIG. 3 is designed as part of a water supply device in such a way that it is flat can be mounted on the side wall of the washing compartment 3.
  • a water supply device in such a way that it is flat can be mounted on the side wall of the washing compartment 3.
  • Such a unit consists of the water supply line 30, which leads via the free air gap 31 and the outlet 32 to the water softener, not shown.
  • the housing 33 forms chambers from which a certain amount of water can be passed through a valve 34 through the outlet 35 for regeneration in a salt vessel, not shown.
  • the component 13 is designed as a flat plastic body and has molded-in ribs such that the air lines 12, 15 and the connecting hose 14 can be mounted side by side.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Schutz gegen Wasserschäden bei einer einen Spülbehälter aufweisenden Geschirrspülmaschine oder dergl.,

  • mit einem Zulaufschlauch und einem diesen mit Abstand dicht umschließenden Hüllschlauch,
  • mit einem Betriebsniveauwächter, mit einem Sicherheitsniveauwächter und mit den Niveauwächtern zugeordneten Windkesseln, wobei der Hüllschlauch über einen Verbindungsschlauch und einen Windkessel in den Spülbehälter mündet, und
  • mit einem dem Zulaufschlauch vorgeschalteten Ventil, das über ein Programmsteuergerät und die den Wasserstand im Spülbehälter erfassenden Nivewauwächter gesteuert wird.
The invention relates to a device for protecting against water damage in a dishwasher or the like having a washing container.
  • with an inlet hose and an enveloping hose sealingly enclosing it at a distance,
  • with an operating level monitor, with a safety level monitor and with the level boilers associated with the level monitors, the enveloping tube opening into the washing container via a connecting tube and an air vessel, and
  • with a valve upstream of the inlet hose, which is controlled by a program control device and the level monitors which detect the water level in the rinsing tank.

Für wasserführende Haushaltgeräte, insbesondere Geschirrspülmaschinen, gibt es seit vielen Jahren eine Vielzahl von Vorschlägen, um die leider immer wieder vorkommenden Wasserschäden auszuschalten. Im Prinzip sind verschiedene Möglichkeiten gegeben, die zu Wasserschäden führen.For water-bearing household appliances, in particular dishwashers, there have been numerous proposals for many years in order to eliminate the water damage that unfortunately occurs again and again. In principle, there are various options that lead to water damage.

Einer der Schäden ist das Platzen des das Wassernetz mit der Maschine verbindenden Zulaufschlauches, was insbesondere dann passieren kann, wenn der Schlauch schon gealtert ist und ständig am Wasserleitungsnetz hängt. Bei häufig nachts auftretenden Druckspitzen platzt so ein Schlauch und das Wasser strömt ungehindert aus. Um dies zu verhindern, können in bekannter Weise am Wasserhahn Ventile verwendet werden, die z.B. bei zu geringem Gegendruck schließen und damit bei geplatztem Schlauch den Schaden dadurch klein halten, daß das am Wasserhahn sitzende Ventil selbsttätig schließt. Eine andere bekannte Möglichkeit ist, das für die Wasserzufuhr zur Maschine ohnehin notwendige Ventil über eine parallel zum Wasserschlauch liegende elektrische Steuerleitung unmittelbar am Wasserhahn anzuschließen, also dem Wasserschlauch vorzuschalten. In einem solchen Fall ist der Wasserschlauch nur während der Zulaufphase unter Druck; die Gefahr eines Wasserschadens ist von vornherein stark gemindert.One of the damages is the bursting of the supply hose connecting the water network to the machine, which can happen in particular if the hose has already aged and is constantly attached to the water supply network. If pressure peaks occur frequently at night, a hose bursts and the water flows out unhindered. In order to prevent this, valves can be used in a known manner on the faucet, which, for example, close when the back pressure is too low and thus when the hose bursts Keep damage small by automatically closing the valve on the tap. Another known possibility is to connect the valve, which is necessary anyway for the water supply to the machine, directly to the tap via an electrical control line lying parallel to the water hose, that is, to connect it upstream of the water hose. In such a case, the water hose is only under pressure during the feed phase; the risk of water damage is greatly reduced from the outset.

Eine weitere Möglichkeit, bei geplatztem Schlauch einen Wasserschaden zu verhindern, ist nach DE-A-28 17 001 der Einsatz eines Hüllschlauches in Kombination mit einem Leckwasserschwimmer oder einem druckgesteuerten Ventil. Ist der Hüllschlauch zwischen dem Wasseranschluß und der Maschine mit dem Zulaufschlauch dicht verbunden, dann wird beim Platzen des Zulaufschlauches im Hüllschlauch ein Druck aufgebaut, durch den ein am Wasserhahn sitzendes druckabhängiges Ventil gesperrt wird.According to DE-A-28 17 001, another possibility of preventing water damage when the hose burst is to use an enveloping hose in combination with a leakage water float or a pressure-controlled valve. If the jacket hose between the water connection and the machine is tightly connected to the inlet hose, a pressure is built up in the jacket hose when the inlet hose bursts, by means of which a pressure-dependent valve located at the tap is blocked.

Ist der Hüllschlauch nur einseitig am Wasserhahn dicht mit dem Zulaufschlauch verbunden, während das andere Ende offen im Maschinengehäuse endet (DE-PS 30 14 427), so kann das hier auslaufende Wasser in einer Leckwasserauffangwanne erfaßt und z.B. über einen Schwimmer ein Ventil gesteuert werden, das netzseitig den Zulaufschlauch vom Versorgungsnetz trennt. Mit der zuletzt genannten Ausführungsform kann über die Leckwasserauffangwanne und den Schwimmer auch eine Undichtigkeit innerhalb der Maschine bzw. der Verschlauchung erfaßt werden.If the envelope hose is only connected to the supply hose on one side at the tap, while the other end ends openly in the machine housing (DE-PS 30 14 427), the water escaping here can be captured in a leakage water trough and e.g. A valve can be controlled via a float that separates the supply hose from the supply network on the network side. With the last-mentioned embodiment, a leak within the machine or the tubing can also be detected via the leakage water trough and the float.

Aus der DE-A-34 25 663 ist es weiterhin bekannt, den ventilseitig offenen Hüllschlauch unmittelbar an den Behälter der Maschine anzuschließen, so daß das im Hüllschlauch auftretende Wasser in die Maschine abgeleitet und dann über den Niveauwächter das vorgeschaltete Magnetventil geschlossen werden kann.From DE-A-34 25 663 it is also known to connect the envelope tube open on the valve side directly to the container of the machine, so that the Envelope hose occurring water drained into the machine and then the upstream solenoid valve can be closed via the level monitor.

Durch die GB-PS 21 61 367 bzw. die DE-A-34 25 589 ist eine Vorrichtung der eingangs genannten Art mit einer Überwachungsvorrichtung für das Spülbehälter-Flüssigkeitsniveau bekanntgeworden, die aus wenigstens einem Betriebs-  und/oder Sicherheitsniveauwächter besteht, der beim Erreichen des normalen Füllniveaus oder eines Sicherheitsniveaus im Spülbehälter anspricht und das Schließen eines programmabhängig schaltbaren, machineneigenen Absperrventiles bewirkt. Dabei ist der Betriebs- und/oder Sicherheitsniveauwächter über eine Luftfallenkammer an den Spülbehälter angeschlossen. Bei dieser Bauart ist vorgesehen, daß der mit dem Hüllschlauch verbundene Verbindungsschlauch entweder an den Windkessel oder direkt an den Spülbehälter angeschlossen ist und daß der Niveauwächter das Schließen des maschineneigenen Absperrventils und des Zulaufventils am Absperrhahn bewirkt.From GB-PS 21 61 367 and DE-A-34 25 589 a device of the type mentioned with a monitoring device for the rinse tank liquid level is known, which consists of at least one operational and / or security level monitor, which is reached when it is reached of the normal filling level or a safety level in the rinsing container and causes the closing of a program-dependent, machine-specific shut-off valve. The operating and / or safety level monitor is connected to the flushing tank via an air trap chamber. In this design, it is provided that the connecting hose connected to the enveloping hose is either connected to the air boiler or directly to the washing tank and that the level monitor causes the machine's own shut-off valve and the inlet valve on the shut-off valve to close.

Ferner wurde bereits vorgeschlagen (DE-A-36 04 673 -  interner Stand der Technik), vor dem Zulaufschlauch ein Doppelventil anzuordnen, das einerseits elektrisch durch das Programmsteuergerät und den Wasserstandsniveauwächter steuerbar ist und andererseits als druckabhängig arbeitendes Ventil so ausgebildet ist, daß ein Luftdruckanstieg im Hüllschlauch, bedingt sowohl durch Undichtigkeiten des Zulaufschlauches als auch durch überhöhten Wasserstand im Behälter der Maschine, ein Schließen des Ventils bewirkt. Diese an sich vorteilhaft arbeitende Vorrichtung ist mit dem Nachteil belastet, daß bei langsam steigendem Wasserniveau im Behälter der Druckanstieg an der Ventilmembrane so schleichend erfolgt, daß der maximal zulässige Wasserstand nicht genau eingehalten werden kann.Furthermore, it has already been proposed (DE-A-36 04 673 - internal state of the art) to arrange a double valve upstream of the inlet hose, which on the one hand can be controlled electrically by the program control device and the water level monitor and on the other hand is designed as a pressure-dependent valve so that an air pressure rise in the enveloping hose, due to both leaks in the inlet hose and excessive water level in the machine's container, the valve closes. This working in itself advantageous The device is burdened with the disadvantage that when the water level in the container rises slowly, the pressure rise at the valve membrane occurs so gradually that the maximum permissible water level cannot be exactly maintained.

Der Erfindung liegt die Aufgabe zugrunde, über die in der DE-A-36 04 673 beschriebenen Schadensfälle hinaus sicherzustellen, daß die Maschine bei Erreichen eines maximal zulässigen Niveaus ebenso sicher und definiert abschaltet, wie bei Undichtigkeiten im Hüllschlauch.The invention has for its object to ensure beyond the damage described in DE-A-36 04 673 that the machine switches off as safely and defined when reaching a maximum permissible level as in the case of leaks in the enveloping tube.

Magnetventile gehören an sich zu den Elementen, die als sehr betriebssicher angesehen werden können. Da diese Ventile aber an einem Leitungsnetz arbeiten, das nicht immer ohne Zusatzstoffe, wie z.B. Sand, ist, ist eine Funktionsstörung solcher Ventile nicht vollständig auszuschließen. Eine weitere Aufgabe der Erfindung ist es, Schäden aus solchen Störungen weitgehend auszuschließen.Solenoid valves are among the elements that can be considered to be very reliable. However, since these valves work on a line network that is not always without additives, e.g. Sand, is, a malfunction of such valves can not be completely excluded. Another object of the invention is to largely rule out damage from such faults.

Gemäß der Erfindung werden die gestellten Aufgaben bei einer Vorrichtung der eingangs beschriebenen Art dadurch gelöst,

  • a) daß der der Verbindungsschlauch mit zwei parallel geschalteten Luftleitungen in Reihe geschaltet ist, deren eine mit dem Windkessel für den Sicherheitsniveauwächter und deren andere mit dem Sicherheitsniveauwächter selbst verbunden ist,
  • b) daß die Luftleitungen mit einem Teil nach Art eines U-förmigen überlaufbogens oberhalb des maximalen Wasserniveaus geführt sind und
  • c) daß das Ventil ein seriell arbeitendes Doppelventil mit zwei elektrisch steuerbaren Elementen, z.B. Magnetspulen, ist, von denen mindestens eines beim Ansprechen des Sicherheitsniveauwächters geschlossen wird.
According to the invention, the objects set are achieved in a device of the type described in the introduction by
  • a) that the connecting hose is connected in series with two parallel air lines, one of which is connected to the air boiler for the safety level monitor and the other of which is connected to the safety level monitor itself,
  • b) that the air pipes are guided with a part in the manner of a U-shaped overflow bend above the maximum water level and
  • c) that the valve is a serial double valve with two electrically controllable elements, for example solenoids, at least one of which is closed when the safety level monitor responds.

Legt man beide Magnetventile in Serie zu den üblichen Steuerelementen, z.B. zu dem Programmsteuergerät und dem Niveauwächter für das Betriebsniveau, so kann wiederum in Serie hierzu auch der zweite Niveauwächters, der das Maximalniveau sowie einen Schadensfall im Zulaufschlauch erfaßt, mit einem Steuerkontakt eingeschleift sein.If you place both solenoid valves in series with the usual control elements, e.g. to the program control device and the level monitor for the operating level, the second level monitor, which detects the maximum level and a damage in the inlet hose, can in turn be looped in with a control contact.

Schaltet man die beiden Magnetventile unabhängig, d.h. einerseits in Abhängigkeit des Programmablaufes und andererseits in Abhängigkeit eines Störfalles im Sinne eines überhöhten Wasserstandes bzw. einer defekten Zulaufleitung oder auch einer Undichtigkeit im Gerät, die mit einem Schwimmerschalter in einer dem Gerät unterlegten Auffangwanne erfaßt werden kann, dann kann man auch einen Defekt am programmgesteuerten Zulaufventil erkennen.If you switch the two solenoid valves independently, i.e. on the one hand depending on the program sequence and on the other hand depending on an accident in the sense of an excessive water level or a defective supply line or a leak in the device, which can be detected with a float switch in a collecting tray under the device, then you can also have a defect in the program-controlled Detect inlet valve.

Durch die erfindungsgemäße Verbindung zwischen dem Hüllschlauch einerseits und dem Windkessel bzw. dem Sicherheitsniveauwächter andererseits über die speziell gestaltete und geführte Leitungsverbindung kann auf einfache Weise sowohl eine Regenerierung der Maschinenfunktion nach einem überhöhten Wasserstand sichergestellt werden als auch eine Wiedereinschaltung der Maschine nach einem Defekt am Zulaufschlauch verhindert werden. Bei einem erhöhten Niveau im Spülbehälter wird der Sicherheitsniveauwächter über den Windkessel und die beiden in dieser Funktion in Reihe liegenden Luftleitungen mit Druck beaufschlagt und schließt das Ventil. Sobald das überhöhte Flüssigkeitsniveau abgesunken ist, fällt der Druck am Sicherheitsniveauwächter wieder ab, so daß das Ventil öffnet. Damit ist die Maschinenfunktion wieder hergestellt. Bei einem Defekt am Zulaufschlauch dringt Leckwasser zunächst in den Verbindungsschlauch und von diesem in die beiden parallelen Luftleitungen ein. Dabei erfolgt in der zum Sicherheitsniveauwächter führenden abgeschlossenen Luftleitung eine Druckerhöhung, so daß der Sicherheitsniveauwächter anspricht und das Magnetventil schließt. In diesem Störfall hat ein Abpumpen des Spülwassers keinen Einfluß auf eine Druckverminderung des Sicherheitsniveauwächters. Dieser echte Störfall wird angezeigt und muß durch den Service behoben werden.The connection according to the invention between the enveloping hose on the one hand and the wind boiler or the safety level monitor on the other hand via the specially designed and routed line connection can be used to easily ensure regeneration of the machine function after an excessive water level and to prevent the machine from being switched on again after a defect in the inlet hose will. If the level in the rinsing tank is elevated, the safety level monitor is pressurized via the air boiler and the two air lines in this function and closes the valve. As soon as the excessive liquid level has dropped, the pressure at the safety level monitor drops again so that the valve opens. The machine function is now restored. If the inlet hose is defective, leakage water first penetrates into the connecting hose and from there into the two parallel air lines. It takes place in the leading to the security level guard closed air line a pressure increase so that the safety level monitor responds and the solenoid valve closes. In this accident, pumping out the flushing water has no effect on reducing the pressure of the safety level monitor. This real fault is displayed and must be remedied by the service.

Durch die erfindungsgemäße Verbindung des Verbindungsschlauches mit den beiden parallel geschalteten Luftleitungen bildet sich praktisch eine Verdichtungskante, durch die am Sicherheitsniveauwächter bei einer Störung am Wasserzulauf auch dann Druck aufgebaut wird, wenn der Spülbehälter leer ist. Für die Erfassung der Störfälle genügt ein Niveauwächter.By connecting the connecting hose according to the invention to the two air lines connected in parallel, a compression edge is practically formed, through which pressure is built up on the safety level monitor in the event of a fault in the water supply even when the washing container is empty. A level monitor is sufficient to record the accidents.

Weitere vorteilhafte Ausgestaltungen des Gegenstandes gemäß der Erfindung sind in den Unteransprüchen dargelegt.Further advantageous refinements of the subject matter according to the invention are set out in the subclaims.

Anhand der Zeichnungen ist ein Ausführungsbeispiel der Erfindung beschrieben und die Wirkungsweise erläutert.An embodiment of the invention is described with reference to the drawings and the mode of operation is explained.

Die Fig. 1 zeigt in schematischer Darstellung eine Gesamtübersicht der Vorrichtung nach der Erfindung in Verbindung mit einem Geschirrspüler.Fig. 1 shows a schematic representation of an overall view of the device according to the invention in connection with a dishwasher.

Die Fig. 2 zeigt Details eines Wasseranschlusses mit Ventilen sowie Details der Verbindung zum Geschirrspüler und des spülerseitigen Anschlusses.2 shows details of a water connection with valves and details of the connection to the dishwasher and the dishwasher-side connection.

Die Fig. 3 zeigt in schematischer Darstellung einen handelsüblichen Wasserzulauf aus geformtem Kunststoff mit einem angeformten Bauteil.Fig. 3 shows a schematic representation of a commercially available water inlet made of molded plastic with a molded component.

Im Gehäuse 1 einer Geschirrspülmaschine ist der Spülbehälter 2 mit seiner frontseitigen Türe 3 angeordnet. Der Spülbehälter ist in bekannter Weise mit einem Sumpf 4 ausgestattet, an den zwei Windkessel 5 und 6 angeschlossen sind. Bodenseitig ist das Gehäuse 1 mit einer Auffangwanne 7 versehen, der ein Schwimmer 8 und ein Schalter 9 zugeordnet ist. Auf die Einzeichnung der dem Sumpf 4 zugeordneten Abwasserpumpe ist hier verzichtet. Mit dem Windkessel 5 ist der Niveauwächter 10 verbunden, der den Wasserzulauf bei Erreichen des Arbeitsniveaus 11 abschaltet. Der Windkessel 6 ist über die Luftleitung 12 und das Bauteil 13 einerseits mit dem Verbindungsschlauch 14 und andererseits über die Luftleitung 15 mit dem Niveauwächter 16 verbunden, der auf das maximal zulässige Niveau 17 anspricht. Das Bauteil 13 ist so in der Maschine angeordnet, daß die Verbindung zum Niveauwächter 16 sowohl vom Verbindungsschlauch 14 als auch vom Luftschlauch 12 niveaumäßig oberhalb des maximal zulässigen Niveaus 17 liegt.The washing compartment 2 with its front door 3 is arranged in the housing 1 of a dishwasher. The rinsing tank is equipped in a known manner with a sump 4, to which two air tanks 5 and 6 are connected. On the bottom side, the housing 1 is provided with a collecting trough 7, which has a float 8 and a switch 9 assigned. The wastewater pump assigned to the sump 4 is not shown here. The level monitor 10 is connected to the wind boiler 5 and switches off the water supply when the working level 11 is reached. The wind boiler 6 is connected via the air line 12 and the component 13 on the one hand to the connecting hose 14 and on the other hand via the air line 15 to the level monitor 16, which responds to the maximum permissible level 17. The component 13 is arranged in the machine in such a way that the connection to the level monitor 16 both from the connecting hose 14 and from the air hose 12 is above the maximum permissible level 17.

Zur Verbindung zwischen der Maschine und dem Wasseranschluß 18 ist die Anschlußeinheit 19 und as Doppelventil 20 mit den Magnetspulen 21 und 22 vorgesehen, die durch die Schlauchleitungen 23, 24 verbunden sind. Die Verschlauchung besteht aus einem Zulaufschlauch 23, einem Hüllschlauch 24 und einem Schutzschlauch 25. Der Zulaufschlauch 23 ist dicht mit dem Doppelventil 20 verbunden. Der Hüllschaluch 24 ist an der Anschlußeinheit 19 so befestigt, daß der abgeschlossene Raum zwischen Zulaufschlauch 23 und Hüllschlauch 24 eine Luftverbindung zum Verbindungsschlauch 14 hat. Der Hüllschlauch 24 ist von einem Schutzschlauch 25 umschlossen, der an der Anschlußeinheit 19 und dem Gehäuse 26 des Ventils 20 befestigt ist. Zwischen dem Hüllschlauch 24 und dem Schutzschlauch 25 ist die elektrische Verdrahtung 27 verlegt. Die Anschlußeinheit 19 hat eine Ausnehmung zum Herausführen der Verdrahtung 27, die zum Steuern der Magnetspulen 21 und 22 mit dem Programmsteuergerät und den Niveauwächtern 10 und 16 sowie dem Kontakt 9 des Schwimmerschalters verbunden sind.For the connection between the machine and the water connection 18, the connection unit 19 and the double valve 20 with the magnetic coils 21 and 22 are provided, which are connected by the hose lines 23, 24. The tubing consists of an inlet hose 23, an enveloping hose 24 and a protective hose 25. The inlet hose 23 is tightly connected to the double valve 20. The enveloping tube 24 is fastened to the connection unit 19 in such a way that the closed space between the inlet tube 23 and the enveloping tube 24 has an air connection to the connecting tube 14. The envelope tube 24 is enclosed by a protective tube 25 which is fastened to the connection unit 19 and the housing 26 of the valve 20. The electrical wiring 27 is laid between the enveloping tube 24 and the protective tube 25. The connection unit 19 has a recess for leading out the wiring 27, which are connected to control the magnetic coils 21 and 22 with the program control device and the level monitors 10 and 16 and the contact 9 of the float switch.

Sind die Magnetspulen 21 und 22 einzeln angesteuert, so wird z.B. das der Spule 21 zugehörige Ventil bei Betätigung des Hauptschalters geöffnet. Das der Spule 22 zugehörige Ventil wird in Abhängigkeit des Programmsteuergerätes und des Niveauwächters 10 geschaltet.If the solenoids 21 and 22 are individually controlled, e.g. the valve associated with the coil 21 is opened when the main switch is actuated. The valve associated with the coil 22 is switched as a function of the program control device and the level monitor 10.

Tritt im Behälter 3 ein überhöhtes Niveau 17 auf, so wird über den Windkessel 6 und die Luftleitungen 12, 15, die teilweise im Bauteil 13 verlaufen, der Niveauwächter 16 mit einem entsprechenden Luftdruck beaufschlagt, so daß er schaltet und unabhängig vom Niveauwächter 10 die Magnetspule 21 entregt. Das entsprechende Ventilteil schließt. Beim Abpumpen der Flüssigkeit aus dem Behälter fällt der Druck am Niveauwächter 16 ab, so daß das Ventil 21 wieder öffnen kann.If an excessive level 17 occurs in the container 3, then the level monitor 16 is acted upon with a corresponding air pressure via the wind boiler 6 and the air lines 12, 15, which partly run in the component 13, so that it switches and the magnet coil independently of the level monitor 10 21 de-excited. The corresponding valve part closes. When the liquid is pumped out of the container, the pressure at the level monitor 16 drops, so that the valve 21 can open again.

Tritt innerhalb des Hüllschlauches 24 Leckwasser auf oder platzt der Zulaufschlauch 23, dann steigt im Verbindungsschlauch 14 und der Luftleitung 15 der Druck an, und der Niveauwächter 16 unterbricht den Stromkreis zur Magnetspule 21. In einem solchen Störfall wird durch das Abpumpen der Maschine der Druck im Verbindungsschlauch 14 und Luftschlauch 15 nicht abgebaut, so daß der echte Störfall angezeigt wird, der Service muß die Störung beseitigen.If leakage water occurs within the enveloping hose 24 or the inlet hose 23 bursts, then the pressure rises in the connecting hose 14 and the air line 15, and the level monitor 16 interrupts the circuit to the solenoid coil 21. In such a malfunction, the pressure in the machine is pumped down Connection hose 14 and air hose 15 are not dismantled, so that the real malfunction is indicated, the service must eliminate the malfunction.

Durch die doppelte Krümmung der Luftleitungen 12, 15 im Bauteil 13 und den Anschluß des Verbindungsschlauches 14 im ersten Scheitelpunkt der Luftleitungen 12, 15 kommt man mit einem Niveauwächter für die beiden vorstehend genannten Störfälle aus, denn auch bei leerem Spülbehälter wird durch Flüssigkeit im Verbindungsschlauch 14 und dem Bauteil 13 Druck in der Leitung 15 aufgebaut.Due to the double curvature of the air lines 12, 15 in the component 13 and the connection of the connecting hose 14 at the first apex of the air lines 12, 15, a level monitor for the two above-mentioned incidents can be used, because even in an empty rinsing container, liquid in the connecting hose 14 and the component 13 built up pressure in line 15.

Vorteilhaft ist es, das Bauteil 13 nach Fig. 3 als Teil einer Wasserzulaufeinrichtung so auszubilden, daß es flach an der Seitenwand des Spülbehälters 3 montiert werden kann. Eine solche Einheit besteht aus der Wasserzulaufleitung 30, die über die freie Luftstrecke 31 und den Auslauf 32 zum nicht gezeichneten Wasserenthärter führt. Das Gehäuse 33 bildet Kammern, aus denen über ein Ventil 34 durch den Auslauf 35 eine bestimmte Wassermenge zum Regenerieren in ein nicht gezeichnetes Salzgefäß geführt werden kann. Das Bauteil 13 ist als flacher Kunststoffkörper ausgebildet und hat eingeformte Rippen derart, daß die Luftleitungen 12, 15 und der Verbindungsschlauch 14 nebeneinanderliegend montiert werden können.It is advantageous to design the component 13 according to FIG. 3 as part of a water supply device in such a way that it is flat can be mounted on the side wall of the washing compartment 3. Such a unit consists of the water supply line 30, which leads via the free air gap 31 and the outlet 32 to the water softener, not shown. The housing 33 forms chambers from which a certain amount of water can be passed through a valve 34 through the outlet 35 for regeneration in a salt vessel, not shown. The component 13 is designed as a flat plastic body and has molded-in ribs such that the air lines 12, 15 and the connecting hose 14 can be mounted side by side.

Claims (5)

  1. A device to protect against water damage in a dishwashing machine or the like, having a rinsing vessel (2),
    - with an inlet hose (23) and a covering hose (24) imperviously surrounding the inlet hose with a clearance,
    - with an operating level monitor (10), with a safety level monitor (16) and with air chambers (5, 6) associated with the level monitors (10, 16), in which the covering hose (24) opens out into the rinsing vessel (2) via a connecting hose (14) and an air chamber, and
    - with a valve (20) connected at the inlet side of the inlet hose (23), which valve is controlled by means of a program control apparatus and the level monitors (10, 16) which pick up the water level in the rinsing vessel (2),
    characterised in that
    a) the connecting hose (14) is connected in series with two air lines (12, 15) which are connected in parallel, one of which air lines (12) is connected with the air chamber (6) for the safety level monitor (16) and the other (15) of which is connected with the safety level monitor (16) itself,
    b) the air lines (12, 15) are guided with a part (13) in the manner of a U-shaped overflow curve above the maximum water level (17) and
    c) the valve is a serially operating double valve (20) with two electrically controllable elements (21, 22), e.g. magnet coils, at least one of which is closed on the response of the safety level monitor (16).
  2. A device according to Claim 1, characterised in that the air lines (12, 15), extending parallel to each other, are connected with each other at one end via a curve in the shape of a hair-pin and that the connecting hose (14) is connected in the region of this hair-pin curve.
  3. A device according to Claim 1 or 2, characterised in that the air lines (12, 15), curved in a hair-pin shape and forming the overflow curve (13), are formed as a common component, on which the connections for the air chamber (6), the safety level monitor (16) and the connecting hose (14) are arranged lying adjacent to each other.
  4. A device according to Claim 3, characterised in that the common component is constructed with a water inlet section (30, 31, 32) of the household equipment and, if necessary also with storage vessels (33) for the water regeneration volume, as a flat structural unit which is able to be applied to the side wall of the rinsing vessel (2).
  5. A device according to one of Claims 1 to 4, characterised in that the valve (20) is surrounded by a housing (26) and the electrical lines (27) are laid between the covering hose (24) and a protective hose (25) which surrounds the covering hose with a clearance, which protective hose is firmly connected to the machine on the one hand with the valve housing (26) and on the other hand with a connection unit (19).
EP88200948A 1987-05-26 1988-05-11 Protecting device against damages caused by water for dish washing machines Expired - Lifetime EP0293031B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873717646 DE3717646A1 (en) 1987-05-26 1987-05-26 DEVICE FOR PROTECTION AGAINST WATER DAMAGE IN DISHWASHER
DE3717646 1987-05-26

Publications (3)

Publication Number Publication Date
EP0293031A2 EP0293031A2 (en) 1988-11-30
EP0293031A3 EP0293031A3 (en) 1989-05-24
EP0293031B1 true EP0293031B1 (en) 1993-07-21

Family

ID=6328401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88200948A Expired - Lifetime EP0293031B1 (en) 1987-05-26 1988-05-11 Protecting device against damages caused by water for dish washing machines

Country Status (3)

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EP (1) EP0293031B1 (en)
DE (2) DE3717646A1 (en)
ES (1) ES2041777T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3917014C2 (en) * 1989-05-24 1996-01-25 Bosch Siemens Hausgeraete Safety hose for the hydraulically secured connection of water-bearing household machines
DE3931528A1 (en) * 1989-09-21 1991-04-11 Bosch Siemens Hausgeraete Safety tube for hydraulic connection of household appliances - an electric cable reaches a magnetic valve via an outlet in a sleeve on the outer flex. hose and the outlet is filled with a sealant
DE4029544A1 (en) * 1990-09-18 1992-03-19 Bosch Siemens Hausgeraete Safety installation for household washing machines - with liquid container, filling control, supply valve, emptying pump and safety level switch
DE4029543C2 (en) * 1990-09-18 1994-09-29 Bosch Siemens Hausgeraete Safety device for water-bearing household appliances, in particular household dishwashers
DE19548514A1 (en) * 1995-12-22 1997-06-26 Bosch Siemens Hausgeraete Domestic washing machine
DE19548513A1 (en) * 1995-12-22 1997-06-26 Bosch Siemens Hausgeraete Domestic washing machine
IT239876Y1 (en) * 1996-12-20 2001-03-13 Bitron Spa DEVICE FOR FIXING A HOUSEHOLD CONNECTION TO AN ACQUASTOP TO A HOUSEHOLD APPLIANCE.
DE19809114C1 (en) * 1998-03-04 1999-06-17 Whirlpool Co Safety circuit for washing machines and dishwashers
EP2372222B1 (en) * 2010-03-29 2014-02-26 MT-Energie GmbH Device for guiding fluids involved in the operation of biogas facilities, sewage treatment facilities or agricultural facilities

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DE2614053A1 (en) * 1976-04-01 1977-10-06 Licentia Gmbh MONITORING DEVICE FOR THE FLUID INLET OF WASHING AND DISHWASHING MACHINES
DE2817001A1 (en) * 1978-04-19 1979-10-31 Gerd Hoeffgen HOSE CONNECTION
DE8330549U1 (en) * 1983-10-24 1984-01-26 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart DEVICE, ESPECIALLY ON DISHWASHER, FOR LEVEL CONTROL
DE8331795U1 (en) * 1983-11-05 1984-02-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt HOSE CONNECTION BETWEEN A PRESSURE PIPE AND A DEVICE-SIDE FEED
DE3425589A1 (en) * 1984-07-11 1986-01-23 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart SAFETY DEVICE AGAINST FLOODING IN LIQUID-CONTAINING HOUSEHOLD APPLIANCES
DE3425663A1 (en) * 1984-07-12 1986-01-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Safety device for a domestic appliance
DE3430639A1 (en) * 1984-08-21 1986-03-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Safety device having two valves
DE3538604A1 (en) * 1985-10-30 1987-05-07 Licentia Gmbh Monitoring device for water-conducting domestic appliances
DE3604673A1 (en) * 1986-02-14 1987-08-20 Bauknecht Hausgeraete DEVICE FOR PROTECTION AGAINST WATER DAMAGE IN DISHWASHER

Also Published As

Publication number Publication date
DE3717646A1 (en) 1988-12-15
DE3882439D1 (en) 1993-08-26
EP0293031A2 (en) 1988-11-30
EP0293031A3 (en) 1989-05-24
ES2041777T3 (en) 1993-12-01

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