EP0684429B1 - Closed expansion tank for fluid-filled installations - Google Patents
Closed expansion tank for fluid-filled installations Download PDFInfo
- Publication number
- EP0684429B1 EP0684429B1 EP95810268A EP95810268A EP0684429B1 EP 0684429 B1 EP0684429 B1 EP 0684429B1 EP 95810268 A EP95810268 A EP 95810268A EP 95810268 A EP95810268 A EP 95810268A EP 0684429 B1 EP0684429 B1 EP 0684429B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- expansion tank
- container
- tank according
- liquid
- gas space
- 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
Links
- 238000009434 installation Methods 0.000 title claims description 4
- 239000012530 fluid Substances 0.000 title claims 2
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims description 7
- 239000003651 drinking water Substances 0.000 claims description 4
- 235000020188 drinking water Nutrition 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000005192 partition Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
- F24D3/1016—Tanks having a bladder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
Definitions
- the invention relates to a closed expansion vessel for liquid-filled systems according to the generic term of claim 1.
- Expansion tanks are mainly used to Volume changes occurring in drinking water and heating systems to balance the liquid or a minimum pressure maintain in the plant.
- the Expansion vessel on a flexible membrane that its Interior separates into a liquid space that is in contact with the plant in question, and an air or gas space, in which usually a certain form is available.
- the air or Gas cushion compresses, and the associated increase in pressure ensures the return of the absorbed liquid to the system in the event of pressure drop or volume decrease.
- Separation membranes come in a wide variety of designs and installation methods used. As examples here on the one hand the so-called inverted membranes, which as the actual partition is installed in the expansion tank, and on the other hand the bubble membranes, which are inside the Expansion vessel form a flexible hollow body, listed.
- An expansion tank with a bladder membrane is described for example in DE-A-29 11 303.
- expansion vessels must have a long service life, are the separation membranes with the highest quality and for manufactured long life. Nevertheless, in individual cases is a manufactured long life. Nevertheless, in individual cases is a Defect of a separation membrane, a leak or a Break, not to be excluded entirely. Such a defect occurs on, liquid penetrates into the gas space and that Expansion tank becomes inoperable. Moreover, it can due to the non-intended contact between the liquid and the vessel wall of the gas space to form corrosion and consequently the liquid becomes contaminated, which is particularly important for expansion tanks Drinking water has an unfavorable effect.
- the expansion vessel described in DE-A-29 11 303 indeed has a leakage water collecting container arranged on the outside with built-in sight glass, whose Interior is connected to the gas space via a passage; since the background of the sight glass but the dark container interior is any leakage water is very difficult to detect.
- a closed expansion vessel for liquid-filled systems especially drinking water and heating systems
- a separating membrane for Separation of liquid space and gas space and one on the Arranged outside of the expansion vessel opposite the container sealed from the surrounding atmosphere
- the container has a clear area through it which occurs in the container when liquid penetrates Liquid level or one through the liquid level movable display organ against a background is recognizable, at least partially by a translucent Area of the container is formed.
- the container is visible against a light background. If the separating membrane now leaks, then when the liquid enters the gas space, also run into the container and can be used immediately from the outside and easily recognized. With a simple optical Review can thus be determined at any time whether the Separation membrane is still intact or possibly a defect having.
- the passage is preferably in the lower third provided in the gas space, particularly preferably on the gas space lowest position.
- Expansion tank has one, usually made of steel manufactured, vessel wall 4. This encloses you Gas space 6. In the gas space 6 there is a bubble separation membrane 8 mounted, the interior of which forms a liquid space 10. The liquid chamber 10 is connected to a via a connection 12 - Not shown here - liquid-filled system connected.
- a float 28 in the interior of the tube 22 which here has the shape of a sphere. As long as none If there is liquid in the tube, the float lies 28 on the bottom of the tube (in extended Dashed position). However, liquid penetrates on, the float 28 is raised in the direction of arrow A. (dashed position) and shows - from clearly recognizable from the outside - a defect in the separating membrane.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Die Erfindung betrifft ein geschlossenes Ausdehnungsgefäss für flüssigkeitsgefüllte Anlagen gemäss Oberbegriff von Patentanspruch 1.The invention relates to a closed expansion vessel for liquid-filled systems according to the generic term of claim 1.
Ausdehnungsgefässe werden hauptsächlich dazu eingesetzt, in Trinkwasser- und Heizungsanlagen auftretende Volumenänderungen der Flüssigkeit auszugleichen bzw. einen Mindestdruck in der Anlage aufrechtzuerhalten. Hierzu weist das Ausdehnungsgefäss eine flexible Membrane auf, die seinen Innenraum trennt in einen Flüssigkeitsraum, der mit der betreffenden Anlage in Verbindung steht, und einen Luft- oder Gasraum, in dem in der Regel ein gewisser Vordruck vorhanden ist. Bei Flüssigkeitsaufnahme wird das Luft- oder Gaspolster komprimiert, und der damit verbundene Druckanstieg sorgt für die Rückführung der aufgenommenen Flüssigkeit an die Anlage bei Druckabfall bzw. Volumenabnahme.Expansion tanks are mainly used to Volume changes occurring in drinking water and heating systems to balance the liquid or a minimum pressure maintain in the plant. For this, the Expansion vessel on a flexible membrane that its Interior separates into a liquid space that is in contact with the plant in question, and an air or gas space, in which usually a certain form is available. With liquid intake, the air or Gas cushion compresses, and the associated increase in pressure ensures the return of the absorbed liquid to the system in the event of pressure drop or volume decrease.
Trennmembranen werden in den unterschiedlichsten Ausführungen und Einbauweisen verwendet. Als Beispiele seien hier zum einen die sogenannten Umstülp-Membranen, welche als eigentliche Trennwand im Ausdehnungsgefäss montiert sind, und zum anderen die Blasen-Membranen, welche innerhalb des Ausdehnungsgefässes einen flexiblen Hohlkörper bilden, angeführt. Ein Ausdehnungsgefäss mit einer Blasen-Membrane ist beispielsweise in der DE-A-29 11 303 beschrieben.Separation membranes come in a wide variety of designs and installation methods used. As examples here on the one hand the so-called inverted membranes, which as the actual partition is installed in the expansion tank, and on the other hand the bubble membranes, which are inside the Expansion vessel form a flexible hollow body, listed. An expansion tank with a bladder membrane is described for example in DE-A-29 11 303.
Da Ausdehnungsgefässe eine lange Standzeit haben müssen, werden die Trennmembranen mit höchster Qualität und für lange Lebensdauer hergestellt. Dennoch ist im Einzelfall ein lange Lebensdauer hergestellt. Dennoch ist im Einzelfall ein Defekt einer Trennmembrane, eine undichte Stelle oder ein Bruch, nicht völlig auszuschliessen. Tritt ein solcher Defekt auf, so dringt Flüssigkeit in den Gasraum ein und das Ausdehnungsgefäss wird funktionsuntüchtig. Überdies kann es durch den nicht vorgesehenen Kontakt zwischen der Flüssigkeit und der Gefässwand des Gasraums zu Korrosionsbildung und demzufolge zu einer Verunreinigung der Flüssigkeit kommen, was sich insbesondere bei Ausdehnungsgefässen für Trinkwasser ungünstig auswirkt.Since expansion vessels must have a long service life, are the separation membranes with the highest quality and for manufactured long life. Nevertheless, in individual cases is a manufactured long life. Nevertheless, in individual cases is a Defect of a separation membrane, a leak or a Break, not to be excluded entirely. Such a defect occurs on, liquid penetrates into the gas space and that Expansion tank becomes inoperable. Moreover, it can due to the non-intended contact between the liquid and the vessel wall of the gas space to form corrosion and consequently the liquid becomes contaminated, which is particularly important for expansion tanks Drinking water has an unfavorable effect.
Aus diesen Gründen ist es bei den bekannten Ausdehnungsgefässen nachteilig, dass ein Membrandefekt kaum oder nur sehr schwierig festgestellt werden kann, weil es bei den meisten Ausdehnungsgefässen nicht möglich ist, den Innenraum des Gefässes einzusehen, und eine Fehlfunktion des Ausdehnungsgefässes auf sonstige Weise für die Benützer der Anlage nicht ohne weiteres erkennbar ist.For these reasons, it is with the known expansion vessels disadvantageous that a membrane defect hardly or can only be determined with great difficulty because of the most expansion tanks, the interior is not possible of the vessel, and a malfunction of the expansion vessel in any other way for the users of the system is not easily recognizable.
Das in der DE-A-29 11 303 beschriebene Ausdehnungsgefäss weist zwar einen auf der Aussenseite angeordneten Leckwasser-Sammelbehälter mit eingebautem Schauglas auf, dessen Innenraum über einen Durchlass mit dem Gasraum verbunden ist; da der Hintergrund des Schauglases aber der dunkle Behälterinnenraum ist, ist allfälliges Leckwasser nur sehr schwer zu erkennen.The expansion vessel described in DE-A-29 11 303 indeed has a leakage water collecting container arranged on the outside with built-in sight glass, whose Interior is connected to the gas space via a passage; since the background of the sight glass but the dark container interior is any leakage water is very difficult to detect.
Es ist daher eine Aufgabe der Erfindung, ein geschlossenes Ausdehnungsgefäss der eingangs beschriebenen Art vorzuschlagen, bei welchem ein allfälliges Eindringen von Flüssigkeit in den Gasraum leicht und deutlich zu erkennen ist. It is therefore an object of the invention to provide a closed one To propose expansion vessels of the type described in the introduction, in which a possible penetration of liquid in the gas space is easy and clear to see.
Diese Aufgabe wird durch die im kennzeichnenden Teil von Patentanspruch 1 definierten Merkmale gelöst; bevorzugte Ausführungsformen ergeben sich aus den abhängigen Patentansprüchen.This task is accomplished by the in the characterizing part Features defined by claim 1 solved; preferred Embodiments result from the dependent Claims.
Demgemäss weist bei einem geschlossenen Ausdehnungsgefäss für flüssigkeitsgefüllte Anlagen, insbesondere Trinkwasser- und Heizungsanlagen, mit einer Trennmembrane zur Trennung von Flüssigkeitsraum und Gasraum und einem auf der Aussenseite des Ausdehnungsgefässes angeordneten, gegenüber der umgebenden Atmosphäre abgeschlossenen Behälter, dessen Innenraum über einen Durchlass mit dem Gasraum verbunden ist, der Behälter einen durchsichtigen Bereich auf, durch welchen ein im Behälter bei eindringender Flüssigkeit auftretender Flüssigkeitsspiegel oder ein durch den Flüssigkeitsspiegel bewegbares Anzeigeorgan vor einem Hintergrund erkennbar ist, der mindestens teilweise durch einen lichtdurchlässigen Bereich des Behälters gebildet wird.Accordingly, with a closed expansion vessel for liquid-filled systems, especially drinking water and heating systems, with a separating membrane for Separation of liquid space and gas space and one on the Arranged outside of the expansion vessel, opposite the container sealed from the surrounding atmosphere Interior connected to the gas space via a passage the container has a clear area through it which occurs in the container when liquid penetrates Liquid level or one through the liquid level movable display organ against a background is recognizable, at least partially by a translucent Area of the container is formed.
Der Behälter ist so vor einem hellen Hintergrund einsehbar. Sollte nun die Trennmembrane undicht werden, dann wird die Flüssigkeit, wenn sie in den Gasraum eindringt, auch in den Behälter laufen und kann dort von aussen sofort und leicht erkannt werden. Mit einer einfachen optischen Überprüfung lässt sich somit jederzeit feststellen, ob die Trennmembrane noch intakt ist oder gegebenenfalls einen Defekt aufweist. The container is visible against a light background. If the separating membrane now leaks, then when the liquid enters the gas space, also run into the container and can be used immediately from the outside and easily recognized. With a simple optical Review can thus be determined at any time whether the Separation membrane is still intact or possibly a defect having.
Vorzugsweise wird der Durchlass im unteren Drittel des Gasraums vorgesehen, besonders bevorzugt an dessen unterster Stelle.The passage is preferably in the lower third provided in the gas space, particularly preferably on the gas space lowest position.
Um das Erkennen allfällig vorhandener Flüssigkeit im Behälter zusätzlich zu unterstützen, kann gemäss einer bevorzugten Ausführungsform im Innenraum des Behälters ein Schwimmer enthalten sein, dessen Äusseres zweckmässig eine gut sichtbare Kontrastfarbe aufweist.In order to detect any liquid in the According to a preferred embodiment in the interior of the container Float must be included, the exterior of which suitably one has clearly visible contrasting color.
Die erfindungsgemässe Lösung ermöglicht mit einer überraschend einfachen konstruktiven Massnahme, ein allfälliges Eindringen von Flüssigkeit in den Gasraum von aussen auf einfache und sichere Weise festzustellen. Die damit verbundenen Zusatzkosten bei der Herstellung von Ausdehnungsgefässen sind sehr gering, was im Hinblick darauf, dass solche Gefässe heutzutage äusserst preiswert angeboten werden, von entscheidender Bedeutung ist.The solution according to the invention enables one surprisingly simple constructive measure, a possible one Penetration of liquid into the gas space from outside in a simple and safe way. The associated additional costs in the production of Expansion tanks are very small, which in view that such vessels are extremely inexpensive these days are offered is critical.
Ferner erweist es sich in bezug auf die Luft- bzw. Gasdichtheit des Ausdehnungsgefässes als sehr vorteilhaft, dass die Erfindung nur eine einzige zusätzliche Öffnung in der Gefässwandung benötigt, deren Durchmesser zudem vergleichsweise klein gehalten werden kann. Da der Vordruck in einem Ausdehnungsgefäss über lange Zeit aufrechterhalten bleiben muss, sind Stellen, die das Risiko eines erhöhten Vordruckverlustes mit sich bringen, möglichst zu vermeiden, und erfahrungsgemäss sind derartige Stellen um so wirkungsvoller abzudichten, je kürzer und einfacher ihre Umfangslinie ist. Aus demselben Grund sind auch an sich denkbare Messvorrichtungen mit im Gasraum angeordneten Elektroden nachteilig, da hierzu Leiterdurchführungen in der Gefässwand eingefügt werden müssen, die sich wegen der notwendigen Isolierung nur mit erheblichem Aufwand befriedigend abdichten lassen.It also proves to be Gas tightness of the expansion tank as very advantageous, that the invention is only a single additional opening in of the vessel wall, the diameter of which is also comparatively high can be kept small. As the form in maintain an expansion tank for a long time Must stay are places that are at increased risk To avoid form pressure loss, if possible to avoid and experience has shown that such positions are all the more effective to seal, the shorter and easier their circumference is. For the same reason, they are also conceivable Measuring devices with electrodes arranged in the gas space disadvantageous, since this leads through conductors in the vessel wall need to be inserted because of the necessary Insulation satisfactory only with considerable effort have it sealed.
Zur näheren Erläuterung der Erfindung wird im folgenden
unter Bezugnahme auf die beiliegenden Zeichnungen ein
Ausführungsbeispiel beschrieben. In den Zeichnungen zeigen
Das in den Figuren 1 und 2 gesamthaft mit 2 bezeichnete
Ausdehnungsgefäss weist eine, in der Regel aus Stahl
gefertigte, Gefässwandung 4 auf. Diese umschliesst einen
Gasraum 6. Im Gasraum 6 ist eine Blasen-Trennmembrane 8
montiert, deren Inneres einen Flüssigkeitsraum 10 bildet.
Der Flüssigkeitsraum 10 ist über einen Anschluss 12 an eine
- hier nicht dargestellte - flüssigkeitsgefüllte Anlage
angeschlossen.That which is designated overall by 2 in FIGS. 1 and 2
Expansion tank has one, usually made of steel
manufactured, vessel wall 4. This encloses you
Am unteren Wandungsabschnitt 4.1 des Ausdehnungsgefässes
2 ist ein in seiner Gesamtheit mit 14 bezeichneter
Behälter angeordnet, dessen Aufbau weiter unten näher
beschrieben wird. Der Innenraum des Behälters 14 ist von
aussen einsehbar und über einen Durchlass 16 mit dem Gasraum
6 des Ausdehnungsgefässes verbunden. In Figur 2 ist
illustrativ angedeutet, wie Flüssigkeit 18 aus einer allfällig
undichten Stelle 20 der Trennmembrane 8 in den
Gasraum 6 eindringt und in der Folge durch den Durchlass 16
in den Behälter 14 läuft und dort festgestellt werden kann.On the lower wall section 4.1 of the expansion tank
2 is one designated in its entirety by 14
Container arranged, the structure of which is described in more detail below
is described. The interior of the
Wie in Figur 3 zu sehen, wird der Behälter 14 durch
ein einseitig geschlossenes Röhrchen 22 gebildet, welches
mit seiner offenen Seite im Presssitz auf einen Anschlussfitting
24 aufgeschoben ist. Das Röhrchen ist durchsichtig
und vorzugsweise aus Kunststoff und hat zweckmässig einen
Durchmesser von etwa 0,5 bis 2 Zentimeter. Der Sitz des
Röhrchens auf dem Fitting und deren gegenseitige Abdichtung
kann gegebenenfalls mit einem geeigneten Klebstoff abgesichert
sein. Bei anderweitigen Ausführungsformen wäre es
dem Fachmann selbstverständlich auch möglich, das Röhrchen
in anderer Weise mit dem Fitting zu verbinden, beispielsweise
durch Verschrauben und Abdichten mittels Dichtring.As can be seen in Figure 3, the
Der Anschlussfitting 24 ist beim vorliegenden
Ausführungsbeispiel im unteren Gefässwandungsabschnitt 4.1
eingeschraubt, wobei ein zwischengelegter Dichtring 26 die
Verbindungsstelle zusätzlich abdichtet. Alternativ dazu
liesse sich der Anschlussfitting beispielsweise auch an der
Wandung anschweissen oder einstückig mit der Wandung ausformen.The connection fitting 24 is in the present
Embodiment in the lower vessel wall section 4.1
screwed in, an
Die Längsachse des Behälters 14 verläuft zweckmässig
vertikal. Sie könnte jedoch ebensogut schräg zur Vertikalen
ausgerichtet sein, wobei eine gewisse Neigung zur Horizontalen,
vorzugsweise um einen Winkel von mindestens 30 Grad,
eingehalten werden sollte, um bei einem allfälligen
Membrandefekt das Einlaufen von Flüssigkeit bzw. das Entweichen
des im Behälter vorhandenen Gases zu ermöglichen.The longitudinal axis of the
Gemäss einer bevorzugten Ausführungsform befindet
sich im Innenraum des Röhrchens 22 ein Schwimmer 28,
welcher vorliegend die Form einer Kugel hat. Solange keine
Flüssigkeit im Röhrchen vorhanden ist, liegt der Schwimmer
28 auf dem Boden des Röhrchens auf (in ausgezogenen
Strichen gezeichnete Stellung). Dringt jedoch Flüssigkeit
ein, so wird der Schwimmer 28 in Pfeilrichtung A angehoben
(gestrichelt gezeichnete Stellung) und zeigt damit - von
aussen klar erkennbar - einen Defekt der Trennmembrane an.According to a preferred embodiment
there is a
Für eine jederzeit klare Ablesesicherheit ist die
mögliche Verlagerungsstrecke des Schwimmers 28 vorzugsweise
so begrenzt, dass er in jedem Fall von aussen gesehen werden
kann. Hierzu bildet im gezeigten Ausführungsbeispiel
die Unterkante 30 des Anschlussfittings 24 einen oberen
Anschlag für den Schwimmer 28, da der Schwimmer-Durchmesser
grösser gewählt ist als der Innendurchmesser des Anschlussfittings.
Selbstverständlich kämen zu diesem Zweck auch
irgendwelche andere Begrenzungsmittel in Frage, etwa
zusätzlich eingefügte Anschlagelemente oder eine
entsprechende Verengung des Behälterquerschnitts. For a clear reading security at all times
possible displacement distance of the
Der von aussen einsehbare Behälter muss keinesfalls zwingend rohrförmig sein, sondern könnte beispielsweise auch kugel- oder quaderförmig sein oder irgendeine andere geeignete Form aufweisen. Ferner würde es auch ausreichen, wenn der Behälter nur teilweise einsehbar wäre. Es wäre zum Beispiel möglich, die Behälterrückseite undurchsichtig zu gestalten, was je nach Umständen das Erkennen eingedrungener Flüssigkeit erleichtern könnte, oder den Behälter mit einer undurchsichtigen Hülse zu umgeben, die nur gerade ein Ablesefenster frei liesse. Und nicht zuletzt sei auf die Möglichkeit hingewiesen, nebst einer Überprüfung von Auge auch eine automatische Kontrolle vorzusehen, etwa mittels einer Lichtschranke oder anderen geeigneten Sensoren.The container that is visible from the outside must not necessarily be tubular, but could be for example also be spherical or cuboid or have any other suitable shape. Furthermore it would also sufficient if the container is only partially visible would. It would be possible, for example, the back of the container to make opaque what, depending on the circumstances, the cognition ingress of liquid which has penetrated, or to surround the container with an opaque sleeve, that just left a reading window open. And not Finally, the possibility is mentioned, along with one Checking eye also an automatic control to be provided, for example by means of a light barrier or other suitable sensors.
Claims (8)
- Closed expansion tank (2) for fluid-filled installations, in particular drinking-water and heating installations, having a separation membrane (8) for separating the liquid space (10) and the gas space (6), and having a container (14) which is arranged on the outside of the expansion tank (2), is sealed off in relation to the surrounding atmosphere, and whose interior is connected via a passage (16) to the gas space (6), characterized in that the container (14) has a transparent region through which there is visible a liquid level occurring in the container (14) in the event of liquid ingress or a display member, which can be moved by the liquid level, on a background which is at least partially formed by a light-permeable region of the container (14).
- Expansion tank according to Patent Claim 1, characterized in that the passage (16) is located in the lower third of the gas space (6) when the expansion tank is aligned in the assembled state.
- Expansion tank according to Patent Claim 2, characterized in that the passage (16) is arranged at the essentially lowest point of the gas space (6).
- Expansion tank according to one of Patent Claims 1 to 3, characterized in that the container (14) is tubular, and its longitudinal axis extends in an alignment differing by at least 30 degrees from the horizontal.
- Expansion tank according to Patent Claim 4, characterized in that the container (14) consists of a small tube (22) which is closed at one end and is mounted by its open end on a connection fitting (24) provided in the wall (4) of the expansion tank.
- Expansion tank according to one of Patent Claims 1 to 5, characterized in that the container (14) is made of a transparent plastic material.
- Expansion tank according to one of Patent Claims 1 to 6, characterized in that there is a float (28) in the interior of the container (14).
- Expansion tank according to Patent Claim 7, characterized in that the possible displacement path of the float (28) is bounded in such a way that it remains in any case in the region of the container (14) which is visible from the outside.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH130494 | 1994-04-27 | ||
CH1304/94 | 1994-04-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0684429A1 EP0684429A1 (en) | 1995-11-29 |
EP0684429B1 true EP0684429B1 (en) | 1998-11-04 |
Family
ID=4207312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95810268A Expired - Lifetime EP0684429B1 (en) | 1994-04-27 | 1995-04-24 | Closed expansion tank for fluid-filled installations |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0684429B1 (en) |
AT (1) | ATE173077T1 (en) |
DE (1) | DE59504105D1 (en) |
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NL1011612C2 (en) * | 1999-03-19 | 2000-09-20 | Frans Van Zaal B V | Expansion tank integral with main heat storage tank for use in horticultural warehouse |
US9915433B2 (en) | 2014-05-30 | 2018-03-13 | Amtrol Licensing Inc. | Moisture detecting air cap indicator for expansion tank failure |
ITUB20152441A1 (en) * | 2015-07-23 | 2017-01-23 | Zilio Ind Srl | HANGING EXPANSION VESSEL |
DE102018115980A1 (en) * | 2018-07-02 | 2020-01-02 | Truma Gerätetechnik GmbH & Co. KG | Frost protection device for water supply device in recreational vehicles |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2905887A1 (en) * | 1979-02-16 | 1980-08-21 | Otto Geb Kg | Diaphragm type expansion vessel - has metal foil sealed to interior of vessel acting as diaphragm |
DE7907661U1 (en) * | 1979-03-19 | 1981-01-22 | Winkelmann & Pannhoff Gmbh, 4730 Ahlen | COMPRESSOR-CONTROLLED EXPANSION VESSEL |
DE2911303C2 (en) * | 1979-03-22 | 1982-10-28 | Gebr. Otto Kg, 5910 Kreuztal | Pressure vessels for pressure boosting systems for drinking water supply systems |
DE3021829A1 (en) * | 1980-06-11 | 1981-12-24 | Manfred 5300 Bonn Schulz | Expansion vessel for hot water circuit - is divided by two diaphragms into gas filled buffer chamber between two water chambers |
-
1995
- 1995-04-24 DE DE59504105T patent/DE59504105D1/en not_active Expired - Fee Related
- 1995-04-24 AT AT95810268T patent/ATE173077T1/en not_active IP Right Cessation
- 1995-04-24 EP EP95810268A patent/EP0684429B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3792555B1 (en) * | 2019-09-12 | 2023-06-14 | Dab Pumps S.p.A. | Expansion vessel with membrane and pump comprising such expansion vessel |
Also Published As
Publication number | Publication date |
---|---|
EP0684429A1 (en) | 1995-11-29 |
ATE173077T1 (en) | 1998-11-15 |
DE59504105D1 (en) | 1998-12-10 |
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