EP2607811B1 - Hot water tank with pressure relief device - Google Patents

Hot water tank with pressure relief device Download PDF

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Publication number
EP2607811B1
EP2607811B1 EP12197561.9A EP12197561A EP2607811B1 EP 2607811 B1 EP2607811 B1 EP 2607811B1 EP 12197561 A EP12197561 A EP 12197561A EP 2607811 B1 EP2607811 B1 EP 2607811B1
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EP
European Patent Office
Prior art keywords
hot water
water tank
tank
membrane
pressure relief
Prior art date
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Not-in-force
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EP12197561.9A
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German (de)
French (fr)
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EP2607811A3 (en
EP2607811A2 (en
Inventor
Stefan Burghardt
Michael Gruber
Gebhard Mayer
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP2607811A2 publication Critical patent/EP2607811A2/en
Publication of EP2607811A3 publication Critical patent/EP2607811A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • F24H9/133—Storage heaters
    • F24H9/136—Arrangement of inlet valves used therewith

Definitions

  • the invention relates to an electric hot water tank, in particular an open hot water tank, for the provision of hot water according to the preamble of patent claim 1.
  • Hot water tank instead of mounted with a special designed for non-pressurized hot water tank fitting with a normal fitting, which can cause the water tank is subjected to a line pressure and also burst.
  • the object of the invention is to provide a hot water tank, in particular an open hot water tank, for the provision of hot water, which continues to ensure safe operation for a user in the event of a possible overpressure situation.
  • the hot water tank according to the invention in particular designed as an open hot water tank, for providing hot water comprises a tank for storing the hot water, an inlet nozzle for supplying cold water into the tank, an outlet for removing the hot water from the tank, and a pressure relief device.
  • the pressure relief device is designed in such a way as to provide a fluid connection between inlet connection and outlet connection during a pressure relief.
  • the pressure relief device thus provides a fluid connection between inlet nozzle and outlet nozzle in the event of a fault, so that the water can flow through the outlet nozzle in case of failure.
  • the pressure relief device Upon reaching a predetermined positive pressure in the lines or in the tank, the pressure relief device can be activated, whereby the fluid connection can be provided.
  • the pressure relief device includes a discharge bypass.
  • the relief bypass can provide a fluid connection between inlet and outlet in case of overpressure. The flowing into the memory water can therefore flow through the outlet pipe, so that the hot water tank can not be destroyed by the resulting pressure.
  • the pressure relief device has a closure unit.
  • the closure unit is set up in order to be able to release the fluid connection in the event of an overpressure situation.
  • the closure unit comprises a membrane, wherein the membrane surface defined by the membrane runs perpendicular to a longitudinal axis of the relief bypass.
  • the membrane can thus activate or enable the pressure relief by tearing. This happens in the case of overpressure or the like, and the cold water can flow through the ruptured membrane via the bypass to the outlet nozzle. The user would then recognize that an error has occurred because the effluent water is cold
  • the invention is particularly suitable for providing a safe open hot water tank in the field of home appliance technology, which is reliably protected against overpressure and thus against bursting of his tank or its water pipes.
  • the closure unit is disposed within the relief bypass of the pressure relief device. As a result, the fluid connection can be easily opened or closed.
  • the relief bypass expediently has a holder for the closure unit. Consequently, the lock unit can be securely fixed in the bypass, and further, a modular structure can be provided.
  • the holder and the discharge bypass are integrally formed. Due to the integral design, the manufacturing costs can be lowered, so that the components can be produced in a simple step, for example by injection molding. Furthermore, by the integral or one-piece construction, the tightness and high pressure resistance can be ensured.
  • the membrane of the closure unit is designed to tear in the event of pressure release.
  • the membrane may have different wall thicknesses or different contours, which both have an influence on the tearing time. For example, a thick membrane will withstand higher pressures and consequently tear later. It is also conceivable that the membrane surface, which is afflicted with water pressure, is formed wavy.
  • the membrane is preferably made of an elastic material, e.g. TPE, manufactured.
  • the membrane comprises an elastic material, in particular a thermoplastic elastomers TPE, which is easy to produce, and if the closure unit is produced in a two-component process, the membrane can be molded fluid-tightly and securely onto the holding frame of the closure unit.
  • TPE thermoplastic elastomers
  • the closure unit preferably comprises a seal, which provides a fluid-tight mounting of the closure unit in the relief bypass.
  • the seal may be formed, for example, as a ring seal, which is attachable along the holding frame.
  • the ring seal has substantially a contour which is adapted to the holding frame.
  • a plurality of such seals are provided on the support frame. These can be arranged on both sides, i. Both sides of the discharge bypass (the side of the inlet nozzle and / or the side of the outlet nozzle) will thus be sealed.
  • the closure unit is designed to be interchangeable by a user.
  • a new, intact closure unit used without having to replace the entire hot water tank.
  • the holder for the closure unit and the relief bypass are integrally formed in and / or on the tank. Consequently, a compact design can be achieved, which is already fluid-tight in the production, without additional seals must be provided. It is also preferred that relief bypass, retainer, inlet ports and outlet ports all be integral with the tank (i.e., integral) in a plastic injection molding process.
  • FIG. 1 a portion of an open hot water tank 1 according to the invention with a preferred pressure relief device 2 is shown. To facilitate the following figuring the pressure relief device 2 is shown substantially enlarged.
  • the hot water tank 1 is used to provide hot water and is in lower or Top table construction installable. He has an indicated tank 4 for storing the hot water, an inlet nozzle 6 for supplying cold water to the tank 4, a discharge nozzle 8 for removing the hot water, a heating unit, not shown, for heating the cold water in the tank 4 and a control and regulating unit, not shown ,
  • the pressure relief device 2 is set up to allow a tank-side or downstream of the pressure relief device 2 downstream positive pressure in the hot water tank 1, in particular within the tank 4 and in the outlet 8 does not rise above an adjustable value.
  • the pressure relief device 2 is used for pressure relief of the downstream water-bearing elements in a possible overpressure.
  • the overpressure can occur if, for example, the outlet nozzle calcified and thus no hot water can be removed from the tank. In this case, cold water would continue to flow into the tank, whereby the pressure in the tank 4 would rise, which leads to a bursting of the plastic tank 4 usually.
  • the pressure relief device is set up to compensate or relieve this overpressure by diverting the cold water via the relief bypass 3 from the inlet connection 6 to the outlet connection 8.
  • the pressure relief device 7 In normal operation, i. no calcification or the like, the pressure relief device 7, a closure unit 7, which prevents the fluid connection between the inlet nozzle 6 and outlet 8.
  • the closure unit 7 is mounted inside the discharge bypass 3 and is fixed by means of a holder 9.
  • the closure unit 7 thus prevents the passage of water through the bypass 9, so that in normal operation cold water can flow into the tank 4 and the user can take hot water through the drain 8.
  • the closure unit 7 can be renewed. Thereafter, the hot water tank can be returned to normal operation. Consequently, the purchase of a complete hot water tank is dispensable.
  • the closure unit 7 is arranged perpendicular to the longitudinal axis 10 of the bypass 3, so as to achieve an effective response speed in case of failure. Consequently, the increased pressure in the tank 4 can be quickly detected, and the membrane 22 of the closure unit 7 can break immediately.
  • Fig. 2a and Fig. 2b show a possible embodiment of the closure unit with a membrane according to the present invention.
  • the closure unit 7 has a holding frame 20, which is annular in this embodiment of the invention.
  • a membrane 22 is clamped, which can be produced together with the holding frame 20 in a two-component injection molding process.
  • the membrane 22 may be made of a thermoplastic elastomer TPE, wherein the holding frame 20 is made of a plastic.
  • the holding frame 20 thus corresponds to the hard component.
  • the closure unit 7 is designed as a module which is non-positively insertable into the holder 9 of the relief bypass.
  • the rubber-elastic membrane 22 can tear in the event of overpressure in the water tank 4 and thus the cold water can flow through the bypass 3 to the outlet nozzle, so that the tank 4 or hot water tank can not be destroyed.
  • the closure unit 7 has a ring seal 21 which blocks the flow of water to the outlet connection 8.
  • the membrane 22 is intact and would rupture after the water pressure on the membrane surface exceeds a predetermined value.
  • This value can for example be preset by the wall thickness or the contour of the TPE material of the membrane.
  • the holder 9 is formed integrally with the tank 4. Consequently, the closure unit 7 can be easily replaced after the membrane 7 bursts.
  • a hot water tank in particular an open hot water tank, for providing hot water, with a tank for storing the hot water, with an inlet nozzle for supplying cold water into the tank and with a spout for removing the hot water from the tank, wherein between the inlet nozzle and the discharge nozzle, a pressure relief device is formed, which counteracts a bursting of the tank or container of the hot water tank in case of failure.

Description

Hintergrund der ErfindungBackground of the invention

Die Erfindung betrifft einen elektrischen Warmwasserspeicher, insbesondere einen offenen Warmwasserspeicher, zur Bereitstellung von Warmwasser nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an electric hot water tank, in particular an open hot water tank, for the provision of hot water according to the preamble of patent claim 1.

Stand der TechnikState of the art

Beim Betrieb von offenen Warmwasserspeichern besteht häufig das Problem, dass nach längerem Betrieb eine Verkalkung auftritt. Die Verkalkung zeigt sich insbesondere in den Gerätebereichen, die mit dem erwärmten Kaltwasser bzw. mit dem Warmwasser in Kontakt kommen. Je nach dem Grad der Verkalkung kann nur noch eine stark begrenzte Warmwassermenge durch einen Tankauslauf abfließen. Hierdurch kann sich in dem Warmwasserspeicher ein erhöhter Systemdruck aufbauen, der bei offenen Warmwasserspeichern, die häufig aufgrund der Verwendung von Kunststofftanks mit einer begrenzten Druckfestigkeit ausgeführt sind, zu einem Platzen bzw. Bersten führen kann. Durch das Platzen des Wassertanks tritt wiederum Warmwasser aus, wodurch ein Wasserschaden entsteht.When operating open hot water tanks, there is often the problem that calcification occurs after prolonged operation. The calcification is particularly evident in the device areas that come into contact with the heated cold water or with the hot water. Depending on the degree of calcification only a very limited amount of hot water can flow through a tank outlet. As a result, an increased system pressure can build up in the hot water tank, which can lead to bursting in open hot water tanks, which are often carried out due to the use of plastic tanks with a limited compressive strength. The bursting of the water tank again causes hot water, which causes water damage.

Um solch Wasserschäden zu vermeiden offenbart die US 2 210 555 A einen elektrischen Warmwasserspeicher mit einem Ventilsystem, um einen sicheren Betrieb des Warmwasserspeichers zu gewährleisten.To avoid such water damage reveals the US 2 210 555 A an electric hot water tank with a valve system to ensure safe operation of the hot water tank.

Ferner besteht bei einer Neuinstallation eines offenen Warmwasserspeichers grundsätzlich die Gefahr eines Falschanschlusses. Bei einem Falschanschluss wird der Warmwasserspeicher anstatt mit einer speziellen für drucklose Warmwasserspeicher ausgelegten Armatur mit einer normalen Armatur montiert, was dazu führen kann, dass der Wassertank mit einem Leitungsdruck beaufschlagt wird und ebenfalls berstet.Furthermore, in the case of a new installation of an open hot water storage tank there is always the risk of a wrong connection. In a wrong connection is the Hot water tank instead of mounted with a special designed for non-pressurized hot water tank fitting with a normal fitting, which can cause the water tank is subjected to a line pressure and also burst.

Der Erfindung zugrundeliegende AufgabeThe problem underlying the invention

Aufgabe der Erfindung ist es, einen Warmwasserspeicher, insbesondere einen offenen Warmwasserspeicher, zur Bereitstellung von Warmwasser zu schaffen, der im Falle einer möglichen Überdrucksituation weiterhin einen sicheren Betrieb für einen Benutzer gewährleistet.The object of the invention is to provide a hot water tank, in particular an open hot water tank, for the provision of hot water, which continues to ensure safe operation for a user in the event of a possible overpressure situation.

Erfindungsgemäße LösungInventive solution

Diese Aufgabe wird gelöst durch einen Warmwasserspeicher mit den Merkmalen des Patentanspruchs 1. Vorteilhafte Aus- und Weiterbildungen, welche einzeln oder in Kombination miteinander einsetzbar sind, ist Gegenstand der jeweils abhängigen Ansprüche.This object is achieved by a hot water tank with the features of claim 1. Advantageous embodiments and further developments, which are used individually or in combination with each other, is the subject of the respective dependent claims.

Der erfindungsgemäße Warmwasserspeicher, insbesondere als offener Warmwasserspeicher ausgebildet, zur Bereitstellung von Warmwasser umfasst einen Tank zur Speicherung des Warmwassers, einen Zulaufstutzen zur Zuführung von Kaltwasser in den Tank, einen Auslaufstutzen zur Entnahme des Warmwassers aus dem Tank, und eine Druckentlastungseinrichtung. Die Druckentlastungseinrichtung ist derart ausgebildet, um während einer Druckentlastung eine Fluidverbindung zwischen Zulaufstutzen und Auslaufstutzen bereitzustellen.The hot water tank according to the invention, in particular designed as an open hot water tank, for providing hot water comprises a tank for storing the hot water, an inlet nozzle for supplying cold water into the tank, an outlet for removing the hot water from the tank, and a pressure relief device. The pressure relief device is designed in such a way as to provide a fluid connection between inlet connection and outlet connection during a pressure relief.

Folglich kann im Falle eines Überdrucks das Kaltwasser über den Auslaufstutzen heraus fließen, so dass kein Bersten des Tanks oder ein Zerstören des Warmwasserspeichers vorkommen kann. Die erfindungsgemäße Druckentlastungseinrichtung stellt im Fehlerfall somit eine Fluidverbindung zwischen Zulaufstutzen und Ablaufstutzen bereit, so dass das Wasser im Fehlerfall über den Ablaufstutzen abfließen kann. Beim Erreichen eines vorherbestimmten Überdrucks in den Leitungen oder im Tank, kann die Druckentlastungseinrichtung aktiviert werden, womit die Fluidverbindung bereitgestellt werden kann.Consequently, in the case of overpressure, the cold water can flow out via the outlet nozzle, so that no bursting of the tank or destruction of the hot water tank can occur. The pressure relief device according to the invention thus provides a fluid connection between inlet nozzle and outlet nozzle in the event of a fault, so that the water can flow through the outlet nozzle in case of failure. Upon reaching a predetermined positive pressure in the lines or in the tank, the pressure relief device can be activated, whereby the fluid connection can be provided.

Die Druckentlastungseinrichtung umfasst einen Entlastungsbypass. Der Entlastungsbypass kann im Falle eines Überdrucks eine Fluidverbindung zwischen Zulauf und Ablauf bereitstellen. Das in den Speicher hinein fließende Wasser kann folglich über den Ablaufstutzen abfließen , so dass der Warmwasserspeicher durch den entstandenen Überdruck nicht zerstört werden kann.The pressure relief device includes a discharge bypass. The relief bypass can provide a fluid connection between inlet and outlet in case of overpressure. The flowing into the memory water can therefore flow through the outlet pipe, so that the hot water tank can not be destroyed by the resulting pressure.

Die Druckentlastungseinrichtung weist eine Verschlusseinheit auf. Somit kann im Normalbetrieb die Fluidverbindung zwischen Zu- und Ablauf unterbrochen werden. Die Verschlusseinheit ist eingerichtet, um im Falle einer Überdrucksituation die Fluidverbindung freigeben zu können.The pressure relief device has a closure unit. Thus, in normal operation, the fluid connection between inlet and outlet can be interrupted. The closure unit is set up in order to be able to release the fluid connection in the event of an overpressure situation.

Erfindungsgemäß umfasst die Verschlusseinheit eine Membran, wobei die durch die Membran definierte Membranfläche senkrecht auf eine Längsachse des Entlastungsbypasses verläuft. Die Membran kann folglich durch Reißen die Druckentlastung aktivieren bzw. ermöglichen. Dies geschieht im Falle eines Überdrucks oder desgleichen, und das Kaltwasser kann durch die geplatzte Membran über den Bypass zum Auslaufstutzen abfließen. Der Benutzer würde dann erkennen, dass ein Fehlerfall vorliegt, da das abfließende Wasser kalt istAccording to the invention, the closure unit comprises a membrane, wherein the membrane surface defined by the membrane runs perpendicular to a longitudinal axis of the relief bypass. The membrane can thus activate or enable the pressure relief by tearing. This happens in the case of overpressure or the like, and the cold water can flow through the ruptured membrane via the bypass to the outlet nozzle. The user would then recognize that an error has occurred because the effluent water is cold

Die Erfindung eignet sich insbesondere zur Bereitstellung eines sicheren offenen Warmwasserspeichers im Bereich der Hausgerätetechnik, der verlässlich gegen einen Überdruck und somit gegen ein Bersten seines Tanks oder seiner Wasserleitungen geschützt ist.The invention is particularly suitable for providing a safe open hot water tank in the field of home appliance technology, which is reliably protected against overpressure and thus against bursting of his tank or its water pipes.

Bevorzugte Ausgestaltung der ErfindungPreferred embodiment of the invention

In einem Ausführungsbeispiel ist die Verschlusseinheit innerhalb des Entlastungsbypasses der Druckentlastungseinrichtung angeordnet. Dadurch kann die Fluidverbindung einfach auf- bzw. zugemacht werden.In one embodiment, the closure unit is disposed within the relief bypass of the pressure relief device. As a result, the fluid connection can be easily opened or closed.

Zweckmäßigerweise weist der Entlastungsbypass eine Halterung für die Verschlusseinheit auf. Folglich kann die Verschlusseinheit sicher im Bypass fixiert werden und ferner kann eine Modularbauweise bereitgestellt werden.The relief bypass expediently has a holder for the closure unit. Consequently, the lock unit can be securely fixed in the bypass, and further, a modular structure can be provided.

Erfindungsgemäß bevorzugt sind die Halterung und der Entlastungsbypass integral ausgebildet. Durch die integrale Ausbildung können die Herstellkosten abgesenkt werden, so dass die Bauteile in einem einfachen Schritt z.B. Spritzgussverfahren herstellbar sind. Ferner durch die integrale bzw. einstückige Bauweise kann die Dichtigkeit und eine hohe Druckfestigkeit gewährleistet werden.According to the invention, the holder and the discharge bypass are integrally formed. Due to the integral design, the manufacturing costs can be lowered, so that the components can be produced in a simple step, for example by injection molding. Furthermore, by the integral or one-piece construction, the tightness and high pressure resistance can be ensured.

Es ist bevorzugt, dass die Membran der Verschlusseinheit ausgebildet ist, um im Falle der Druckentlastung zu reißen. Durch die Geometrie der Membran kann somit die Schwelle des Drucks eingestellt werden, ab welcher die Druckentlastung statt finden soll. Die Membran kann unterschiedliche Wandstärken aufweisen oder auch unterschiedliche Konturen, welche beide einen Einfluss auf den Reißzeitpunkt haben. So wird beispielsweise eine dicke Membran höheren Drücken stand halten und folglich später reißen. Auch vorstellbar ist, dass die Membranfläche, die mit Wasserdruck behaftet wird, gewellt ausgebildet ist. Die Membran ist vorzugsweise aus einem elastischen Material, z.B. TPE, hergestellt.It is preferred that the membrane of the closure unit is designed to tear in the event of pressure release. By the geometry of the membrane thus the threshold of the pressure can be adjusted, from which the pressure relief should take place. The membrane may have different wall thicknesses or different contours, which both have an influence on the tearing time. For example, a thick membrane will withstand higher pressures and consequently tear later. It is also conceivable that the membrane surface, which is afflicted with water pressure, is formed wavy. The membrane is preferably made of an elastic material, e.g. TPE, manufactured.

Vorzugsweise umfasst die Membran ein elastisches Material, insbesondere ein thermoplastisches Elsatomer TPE, welches leicht herstellbar ist, und falls die Verschlusseinheit in einem Zweikomponentenverfahren hergestellt ist, kann die Membran fluiddicht und sicher an dem Halterahmen der Verschlusseinheit angespritzt werden.Preferably, the membrane comprises an elastic material, in particular a thermoplastic elastomers TPE, which is easy to produce, and if the closure unit is produced in a two-component process, the membrane can be molded fluid-tightly and securely onto the holding frame of the closure unit.

Die Verschlusseinheit umfasst bevorzugt eine Dichtung, welche eine fluiddichte Montage der Verschlusseinheit im Entlastungsbypass bereitstellt. Die Dichtung kann beispielsweise als Ringdichtung ausgebildet sein, die entlang des Halterahmens anbringbar ist. Die Ringdichtung weist im Wesentlichen eine Kontur auf, die dem Halterahmen angepasst ist. Vorzugsweise sind mehrere solcher Dichtungen am Halterahmen vorgesehen. Diese können beidseitig angeordnet sein, d.h. beide Seiten des Entlastungsbypasses (die Seite des Zulaufstutzens und/oder auch die Seite des Auslaufstutzens) werden somit abgedichtet sein.The closure unit preferably comprises a seal, which provides a fluid-tight mounting of the closure unit in the relief bypass. The seal may be formed, for example, as a ring seal, which is attachable along the holding frame. The ring seal has substantially a contour which is adapted to the holding frame. Preferably, a plurality of such seals are provided on the support frame. These can be arranged on both sides, i. Both sides of the discharge bypass (the side of the inlet nozzle and / or the side of the outlet nozzle) will thus be sealed.

In einer erfindungsgemäßen Ausführungsform ist die Verschlusseinheit durch einen Benutzer austauschbar ausgebildet. Somit kann beispielsweise nachdem die Membran nach einer Druckentlastung geplatzt ist, eine neue, intakte Verschlusseinheit eingesetzt werden, ohne dass der komplette Warmwasserspeicher ausgetauscht werden muss.In one embodiment of the invention, the closure unit is designed to be interchangeable by a user. Thus, for example, after the membrane has burst after a pressure relief, a new, intact closure unit used without having to replace the entire hot water tank.

Gemäß einer Ausführungsform der Erfindung sind die Halterung für die Verschlusseinheit und der Entlastungsbypass integral im und/oder am Tank ausgeführt. Folglich kann eine kompakte Bauform erreicht werden, welche bereits in der Herstellung fluiddicht ist, ohne dass zusätzliche Dichtungen vorgesehen werden müssen. Es ist auch bevorzugt, dass Entlastungsbypass, Halterung, Zulaufstutzen und Auslaufstutzen allesamt mit dem Tank integral (d.h. einstückig) in einem Spritzgussverfahren aus Kunststoff herstellbar sind.According to one embodiment of the invention, the holder for the closure unit and the relief bypass are integrally formed in and / or on the tank. Consequently, a compact design can be achieved, which is already fluid-tight in the production, without additional seals must be provided. It is also preferred that relief bypass, retainer, inlet ports and outlet ports all be integral with the tank (i.e., integral) in a plastic injection molding process.

Im Folgenden wird ein bevorzugtes Ausführungsbeispiel der Erfindung anhand schematischer Darstellungen näher erläutert. Es zeigen:

  • Figur 1 eine Detaildarstellung der Druckentlastungseinrichtung eines erfindungsgemäßen offenen Warmwasserspeichers, und
  • Figur 2 a), b) zwei perspektivische Ansichten einer erfindungsgemäßen Verschlusseinheit für die Druckentlastungseinrichtung aus Fig. 1.
In the following, a preferred embodiment of the invention is explained in more detail with reference to schematic representations. Show it:
  • FIG. 1 a detailed view of the pressure relief device of an open hot water tank according to the invention, and
  • FIG. 2 a), b) two perspective views of a closure unit according to the invention for the pressure relief device from Fig. 1 ,

Ausführliche Beschreibung anhand eines AusführungsbeispielsDetailed description based on an embodiment

Bei der nachfolgenden Beschreibung zweier bevorzugter Ausführungsformen der vorliegenden Erfindung bezeichnen gleiche Bezugszeichen gleiche oder vergleichbare Komponenten.In the following description of two preferred embodiments of the present invention, like reference characters designate like or similar components.

Die in der vorstehenden Beschreibung, den Ansprüchen und den Zeichnungen offenbarten Merkmale können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausgestaltungen von Bedeutung sein.The features disclosed in the foregoing description, the claims and the drawings may be of importance both individually and in any combination for the realization of the invention in its various forms.

In Figur 1 ist ein Bereich eines erfindungsgemäßen offenen Warmwasserspeichers 1 mit einer bevorzugten Druckentlastungseinrichtung 2 gezeigt. Zur Erleichterung der folgenden Bezifferung ist die Druckentlastungseinrichtung 2 wesentlich vergrößert dargestellt. Der Warmwasserspeicher 1 dient zur Bereitstellung von Warmwasser und ist in Unter- oder Obertischbauweise installierbar. Er hat einen angedeuteten Tank 4 zur Speicherung des Warmwassers, einen Zulaufstutzen 6 zur Zuführung von Kaltwasser zum Tank 4, einen Auslaufstutzen 8 zur Entnahme des Warmwassers, eine nicht gezeigte Heizeinheit zur Erwärmung des Kaltwassers in dem Tank 4 sowie eine nicht gezeigte Steuer- und Regelungseinheit.In FIG. 1 a portion of an open hot water tank 1 according to the invention with a preferred pressure relief device 2 is shown. To facilitate the following figuring the pressure relief device 2 is shown substantially enlarged. The hot water tank 1 is used to provide hot water and is in lower or Top table construction installable. He has an indicated tank 4 for storing the hot water, an inlet nozzle 6 for supplying cold water to the tank 4, a discharge nozzle 8 for removing the hot water, a heating unit, not shown, for heating the cold water in the tank 4 and a control and regulating unit, not shown ,

Die Druckentlastungseinrichtung 2 ist eingerichtet, um einen tankseitigen bzw. von der Druckentlastungseinrichtung 2 aus betrachtet stromabwärtigen Überdruck in dem Warmwasserspeicher 1, insbesondere innerhalb des Tanks 4 und in dem Auslauf 8 nicht über einen einstellbaren Wert ansteigen zu lassen. Zudem dient die Druckentlastungseinrichtung 2 zur Druckentlastung der stromabwärtigen wasserführenden Elemente bei einem möglichen Überdruck. Der Überdruck kann entstehen falls beispielsweise der Auslaufstutzen verkalkt und somit kein Warmwasser aus dem Tank entnommen werden kann. In diesem Fall würde Kaltwasser weiter in den Tank fließen, wodurch der Druck im Tank 4 ansteigen würde, welches zu einem Bersten des üblicherweise Kunststofftanks 4 führt.The pressure relief device 2 is set up to allow a tank-side or downstream of the pressure relief device 2 downstream positive pressure in the hot water tank 1, in particular within the tank 4 and in the outlet 8 does not rise above an adjustable value. In addition, the pressure relief device 2 is used for pressure relief of the downstream water-bearing elements in a possible overpressure. The overpressure can occur if, for example, the outlet nozzle calcified and thus no hot water can be removed from the tank. In this case, cold water would continue to flow into the tank, whereby the pressure in the tank 4 would rise, which leads to a bursting of the plastic tank 4 usually.

Die Druckentlastungseinrichtung ist eingerichtet, um diesen Überdruck auszugleichen bzw. zu entlasten, indem sie das Kaltwasser über den Entlastungsbypass 3 vom Zulaufstutzen 6 zum Auslaufstutzen 8 umleitet.The pressure relief device is set up to compensate or relieve this overpressure by diverting the cold water via the relief bypass 3 from the inlet connection 6 to the outlet connection 8.

Im Normalbetrieb, d.h. keine Verkalkung oder desgleichen, weist die Druckentlastungseinrichtung 7 eine Verschlusseinheit 7 auf, welche die Fluidverbindung zwischen Zulaufstutzen 6 und Auslaufstutzen 8 unterbindet. Die Verschlusseinheit 7 ist innerhalb des Entlastungsbypasses 3 montiert und wird mittels einer Halterung 9 fixiert.In normal operation, i. no calcification or the like, the pressure relief device 7, a closure unit 7, which prevents the fluid connection between the inlet nozzle 6 and outlet 8. The closure unit 7 is mounted inside the discharge bypass 3 and is fixed by means of a holder 9.

Die Verschlusseinheit 7 unterbindet somit den Wasserdurchlauf durch den Bypass 9, so dass im Normalbetrieb Kaltwasser in den Tank 4 fließen kann und der Benutzer durch den Ablauf 8 Warmwasser entnehmen kann.The closure unit 7 thus prevents the passage of water through the bypass 9, so that in normal operation cold water can flow into the tank 4 and the user can take hot water through the drain 8.

Falls im Störfall der Ablauf durch Verkalkung verstopft ist, steigt der Druck innerhalb des Tanks und das hinein fließende Kaltwasser wird durch den Bypass 9 auf die Verschlusseinheit 7 gedrückt. Die Verschlusseinheit 7 wird bei Erreichen eines bestimmten Druckes nachgeben, so dass das Wasser durch den Bypass und durch die geplatzte Verschlusseinheit zum Auslauf gelangen kann.If, in the event of a malfunction, the process is clogged by calcification, the pressure within the tank increases and the cold water flowing in is forced through the bypass 9 onto the closure unit 7. The closure unit 7 will give in on reaching a certain pressure, so that the water through the bypass and through the bursting closure unit can reach the outlet.

Der Benutzer würde feststellen, dass lediglich Kaltwasser fließt und somit den Fehlerfall erkennen. Nach Beseitigung der Störung im Auslauf, d.h. beispielsweise Entfernung der Verkalkung, kann die Verschlusseinheit 7 erneuert werden. Danach kann der Warmwasserspeicher wieder im Normalbetrieb genommen werden. Folglich ist der Neukauf eines kompletten Warmwasserspeichers entbehrlich.The user would find that only cold water is flowing, thus detecting the error. After elimination of the disturbance in the outlet, i. For example, removal of the calcification, the closure unit 7 can be renewed. Thereafter, the hot water tank can be returned to normal operation. Consequently, the purchase of a complete hot water tank is dispensable.

In dieser Ausführungsform ist die Verschlusseinheit 7 senkrecht auf die Längsachse 10 des Bypasses 3 angeordnet, um somit eine effektive Ansprechgeschwindigkeit im Fehlerfall zu erreichen. Folglich kann der erhöhte Druck im Tank 4 schnell erkannt werden, und die Membran 22 der Verschlusseinheit 7 kann sofort reißen.In this embodiment, the closure unit 7 is arranged perpendicular to the longitudinal axis 10 of the bypass 3, so as to achieve an effective response speed in case of failure. Consequently, the increased pressure in the tank 4 can be quickly detected, and the membrane 22 of the closure unit 7 can break immediately.

Fig. 2a und Fig. 2b zeigen eine mögliche Ausführungsform der Verschlusseinheit mit einer Membran gemäß der vorliegenden Erfindung. Die Verschlusseinheit 7 weist einen Halterahmen 20 auf, der in dieser Ausführungsform der Erfindung ringförmig ausgebildet ist. Im Halterahmen 20 ist eine Membran 22 aufgespannt, welche zusammen mit dem Halterahmen 20 in einem Zweikomponentenspritzgussverfahren herstellbar ist. Die Membran 22 kann aus einem thermoplastischen Elastomer TPE hergestellt werden, wobei der Halterahmen 20 aus einem Kunststoff herstellbar ist. Der Halterahmen 20 entspricht somit der Hartkomponente. Fig. 2a and Fig. 2b show a possible embodiment of the closure unit with a membrane according to the present invention. The closure unit 7 has a holding frame 20, which is annular in this embodiment of the invention. In the holding frame 20, a membrane 22 is clamped, which can be produced together with the holding frame 20 in a two-component injection molding process. The membrane 22 may be made of a thermoplastic elastomer TPE, wherein the holding frame 20 is made of a plastic. The holding frame 20 thus corresponds to the hard component.

In dieser Ausführungsform ist die Verschlusseinheit 7 als Modul ausgebildet, die kraftschlüssig in die Halterung 9 des Entlastungsbypasses einsetzbar ist. Die gummielastische Membran 22 kann im Falle eines Überdrucks im Wassertank 4 reißen und somit kann das Kaltwasser über den Bypass 3 zum Auslaufstutzen abfließen, so dass der Tank 4 bzw. Warmwasserbehälter nicht zerstört werden kann.In this embodiment, the closure unit 7 is designed as a module which is non-positively insertable into the holder 9 of the relief bypass. The rubber-elastic membrane 22 can tear in the event of overpressure in the water tank 4 and thus the cold water can flow through the bypass 3 to the outlet nozzle, so that the tank 4 or hot water tank can not be destroyed.

Damit im Normalbetrieb der Entlastungsbypass 9 gesperrt ist, weist die Verschlusseinheit 7 eine Ringdichtung 21 auf, welche den Wasserfluss zum Auslaufstutzen 8 sperrt. In diesem Fall ist die Membran 22 intakt und diese würde reißen, nachdem der Wasserdruck auf die Membranfläche, einen vorherbestimmten Wert überschreitet. Dieser Wert kann beispielsweise durch die Wandstärke oder der Kontur des TPE Materials der Membran voreingestellt werden.So that the discharge bypass 9 is locked in normal operation, the closure unit 7 has a ring seal 21 which blocks the flow of water to the outlet connection 8. In this case, the membrane 22 is intact and would rupture after the water pressure on the membrane surface exceeds a predetermined value. This value can for example be preset by the wall thickness or the contour of the TPE material of the membrane.

Gemäß einem Ausführungsbeispiel ist die Halterung 9 integral mit dem Tank 4 ausgebildet. Folglich kann die Verschlusseinheit 7 nach einem Aufplatzen der Membran 7 einfach ersetzt werden. Bei dieser modularen Bauweise hat es sich als vorteilhaft herausgestellt, dass zwei Ringdichtungen 21 für die Verschlusseinheit 7 vorgesehen werden sollen. Dadurch kann der kraftschlüssige Einsatz der Verschlusseinheit 7 in der Halterung 9 fest und fluiddicht gewährleistet werden. Weiter können mehrere Dichtungen 21 oder Dichtelemente implementiert werden.According to one embodiment, the holder 9 is formed integrally with the tank 4. Consequently, the closure unit 7 can be easily replaced after the membrane 7 bursts. In this modular design, it has proven to be advantageous that two ring seals 21 are to be provided for the closure unit 7. As a result, the frictional use of the closure unit 7 in the holder 9 can be ensured firmly and fluid-tight. Furthermore, a plurality of seals 21 or sealing elements can be implemented.

Offenbart ist ein Warmwasserspeicher, insbesondere ein offener Warmwasserspeicher, zur Bereitstellung von Warmwasser, mit einem Tank zur Speicherung des Warmwassers, mit einem Zulaufstutzen zur Zuführung von Kaltwasser in den Tank und mit einem Auslaufstutzen zur Entnahme des Warmwassers aus dem Tank, wobei zwischen dem Zulaufstutzen und dem Auslaufstutzen eine Druckentlastungseinrichtung ausgebildet ist, welche im Fehlerfall einem Bersten des Tanks bzw. Behälters des Warmwasserspeichers entgegenwirkt.Disclosed is a hot water tank, in particular an open hot water tank, for providing hot water, with a tank for storing the hot water, with an inlet nozzle for supplying cold water into the tank and with a spout for removing the hot water from the tank, wherein between the inlet nozzle and the discharge nozzle, a pressure relief device is formed, which counteracts a bursting of the tank or container of the hot water tank in case of failure.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
WarmwasserspeicherHot water storage
22
DruckentlastungseinrichtungPressure relief device
33
Entlastungsbypassrelief bypass
44
Tank bzw. WarmwasserbehälterTank or hot water tank
66
Zulaufstutzen bzw. ZulaufInlet nozzle or inlet
77
Verschlusseinheitshutter unit
88th
Auslaufstutzen bzw. AuslaufOutlet spout or spout
99
Halterung bzw. Haltemodul für die Verschlusseinheit 7Holder or holding module for the closure unit 7
1010
Längsachse des EntlastungsbypassesLongitudinal axis of the discharge bypass
2020
Halterahmenholding frame
2121
Dichtungpoetry
2222
Membranmembrane
2323
Membranflächemembrane area

Claims (10)

  1. Electric hot water tank (1), in particular open hot water tank, for supplying hot water, having a tank (4) for storing the hot water, having a supply connector (6) for conducting cold water into the tank (4), having an outlet connector (8) for removing the hot water from the tank (4), and having a pressure relief device (2), wherein the pressure relief device (2) is embodied so as to provide, during a release of pressure, a fluid connection between supply connector (6) and outlet connector (8), wherein the pressure relief device (2) comprises a relief bypass (3), and wherein the pressure relief device (2) comprises a sealing unit (7), characterised in that the sealing unit (7) comprises a membrane (22), wherein the membrane surface (23) defined by the membrane (22) extends perpendicular to a longitudinal axis (10) of the relief bypass (3).
  2. Hot water tank (1) arranged within the relief bypass (3) of the pressure relief device (2).
  3. Hot water tank (1) according to claim 1, characterised in that the relief bypass (3) has a mount (9) for the sealing unit (7).
  4. Hot water tank (1) according to claim 3, characterised in that the mount (3) and the relief bypass (3) are embodied integrally.
  5. Hot water tank (1) according to one of the preceding claims, characterised in that the membrane (22) of the sealing unit (7) is embodied to tear in the event of a release of pressure.
  6. Hot water tank (1) according to one of the preceding claims, characterised in that the membrane (22) comprises an elastic material, in particular a thermoplastic elastomer TPE.
  7. Hot water tank (1) according to one of the preceding claims, characterised in that the membrane (22) is affixed to a retaining frame (20) of the sealing unit (7) by means of a two-component method.
  8. Hot water tank (1) according to one of the preceding claims, characterised in that the sealing unit (7) comprises a gasket (22).
  9. Hot water tank (1) according to one of the preceding claims, characterised in that the sealing unit (7) is embodied to be replaceable by a user.
  10. Hot water tank (1) according to one of the preceding claims 3 to 9, characterised in that the mount (9) for the sealing unit (7) and the relief bypass (3) are realised integrally in and/or on the tank (4).
EP12197561.9A 2011-12-21 2012-12-17 Hot water tank with pressure relief device Not-in-force EP2607811B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011089447A DE102011089447A1 (en) 2011-12-21 2011-12-21 Hot water tank with pressure relief device

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EP2607811A2 EP2607811A2 (en) 2013-06-26
EP2607811A3 EP2607811A3 (en) 2015-12-23
EP2607811B1 true EP2607811B1 (en) 2017-03-15

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DE (1) DE102011089447A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108613372A (en) * 2018-06-15 2018-10-02 骆德育 A kind of pressure-bearing storage water heater with press-bearing water tank protective device
CN108759095A (en) * 2018-06-15 2018-11-06 骆德育 A kind of press-bearing water tank protective device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018115980A1 (en) * 2018-07-02 2020-01-02 Truma Gerätetechnik GmbH & Co. KG Frost protection device for water supply device in recreational vehicles
DE202019001248U1 (en) * 2019-03-15 2020-06-19 Gebr. Kemper Gmbh + Co. Kg Device for relieving the pressure of a water system and connection module with such a device
CN113310220B (en) * 2021-06-02 2022-09-20 常州工业职业技术学院 Zero-cold-water control system, control method and readable storage medium

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US2210555A (en) * 1934-12-12 1940-08-06 Podolsky Jacob Boiler relief device
CH362823A (en) * 1957-03-22 1962-06-30 Siemens Ag Safety device for hot water storage tanks in overflow form
US4607615A (en) * 1985-03-28 1986-08-26 Boals Wayne S Automatic control system for water heaters
DE19501320A1 (en) * 1995-01-18 1996-07-25 Forbach Gmbh Open hot water tank
US6021808A (en) * 1998-01-21 2000-02-08 Dulac; Lawrence M. Fluid supply shut off valve system and fluid monitoring device for use with same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108613372A (en) * 2018-06-15 2018-10-02 骆德育 A kind of pressure-bearing storage water heater with press-bearing water tank protective device
CN108759095A (en) * 2018-06-15 2018-11-06 骆德育 A kind of press-bearing water tank protective device
CN108759095B (en) * 2018-06-15 2023-08-25 骆德育 Pressure-bearing water tank protection device

Also Published As

Publication number Publication date
EP2607811A3 (en) 2015-12-23
DE102011089447A1 (en) 2013-06-27
EP2607811A2 (en) 2013-06-26

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