EP0602430B1 - Expansion vessel for domestic hot water in connection with a connector assembly - Google Patents

Expansion vessel for domestic hot water in connection with a connector assembly Download PDF

Info

Publication number
EP0602430B1
EP0602430B1 EP93119100A EP93119100A EP0602430B1 EP 0602430 B1 EP0602430 B1 EP 0602430B1 EP 93119100 A EP93119100 A EP 93119100A EP 93119100 A EP93119100 A EP 93119100A EP 0602430 B1 EP0602430 B1 EP 0602430B1
Authority
EP
European Patent Office
Prior art keywords
cavity
inlet
flow
outlet
expansion vessel
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
EP93119100A
Other languages
German (de)
French (fr)
Other versions
EP0602430A1 (en
Inventor
Willi Hecking
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.)
Hans Sasserath GmbH and Co KG
Original Assignee
Hans Sasserath GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hans Sasserath GmbH and Co KG filed Critical Hans Sasserath GmbH and Co KG
Publication of EP0602430A1 publication Critical patent/EP0602430A1/en
Application granted granted Critical
Publication of EP0602430B1 publication Critical patent/EP0602430B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/075—Arrangement of devices for control of pressure or flow rate
    • 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
    • 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
    • F24D3/1041—Flow-through
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/188—Water-storage heaters with means for compensating water expansion

Definitions

  • the invention relates to an expansion vessel for heated drinking water in connection with a connection fitting, containing a cavity closed by a membrane, which is in communication with a drinking water heater, and an adjacent to the cavity, bounded by a housing, in which the connection fitting for Connection of the cavity to an inlet and and for connecting the inlet to an outlet is designed so that a drinking water flow is generated through the cavity when tapping warm drinking water.
  • the invention has for its object to provide an expansion vessel for drinking water heaters and a connection fitting for such an expansion vessel so that on the one hand a stagnant water volume is avoided, but on the other hand water can be drawn without significant pressure loss.
  • the invention is further based on the object of making it easier to check the expansion vessel.
  • the first-mentioned object is achieved in the case of an expansion vessel of the type mentioned at the outset in such a way that the connection fitting has a direct flow passage between the inlet which passes the cavity and has an outlet, the connection fitting also produces a flow path parallel to the direct flow passage and through the cavity and a suction device is arranged in this parallel flow path, by means of which a suction can be generated by means of the flow of drinking water flowing in the direct flow path, which when tapping drinking water, a flow can be generated via the parallel flow path through the cavity into a downstream part of the direct flow path.
  • the test can be facilitated by providing first valve means by which the parallel flow path upstream and downstream of the cavity can be shut off, second valve means by which the cavity can be connected to a test outlet, and that Housing has a connection for a pressure measuring device for measuring the gas pressure in the gas pressure chamber.
  • the cavity on the inlet and outlet sides can be separated from the system and relieved of the operating pressure of the water. Then the pressure of the compressed gas can be measured unaffected by this operating pressure via the connection, practically the filling valve.
  • Embodiments of the invention are the subject of dependent claims 4 to 12.
  • 40 denotes a housing of an expansion vessel.
  • the housing 40 there is a membrane designed as a bubble membrane 42.
  • the bladder membrane is a hollow body made of an elastic material with an inlet opening 44.
  • the inlet opening 44 is surrounded by a thickened edge 46.
  • the housing 40 also has an inlet opening 48.
  • the inlet opening is surrounded by a connecting piece 50.
  • the bladder membrane 42 is attached to the housing 40 with its edge 46 around the inlet opening 48.
  • the bladder membrane 42 forms a cavity 52.
  • a compressed gas space 54 is formed between the bladder membrane 42 and the housing 40.
  • a compressed gas can be filled into the compressed gas space 54 via a filling valve 56.
  • connection fitting 58 is attached to the housing 40.
  • the connection fitting 58 has a connection piece 60 with a flange 62.
  • a union nut 64 is screwed onto the connection piece 50 of the housing 50.
  • the union nut 64 engages over the flange 60 of the connection fitting 58.
  • the union nut 64 has a round wire 66. This round wire sits in an inner groove of the union nut 64 and is in contact with the flange 62 of the connecting piece 60.
  • a sealing ring 68 lies between the connecting pieces 50 and 60.
  • connection fitting 58 has an inlet 70 and an outlet 72 arranged directly next to it. Inlet 70 and outlet 72 are separated by a partition 74. A direct passage 76 is formed in the partition 74 between the inlet 70 and the outlet 72. Drinking water entering inlet 70 predominantly flows directly from inlet 70 to outlet 72. This is indicated in FIG. 1 by arrowheads 77.
  • a return channel 78 is formed coaxially in the connecting piece 60 in the connection fitting 58.
  • the return channel 78 merges into an outlet pipe 80 aligned therewith.
  • the outlet pipe 80 protrudes into the Bubble membrane 42 formed cavity 52 into the part facing away from the connection fitting 58 and the inlet openings 44 and 48.
  • the outlet pipe 80 is closed at its free end by a plug 82.
  • the outlet pipe 80 has lateral inlet openings 84.
  • a flow path 86 parallel to the passage 76 is formed from the inlet 70.
  • the parallel flow path 86 contains a flow part 88 with a channel 90, the annular space 92 between the connecting pieces 60 and 50 of the connection fitting 58 or the housing 40 and the return channel 78 or the outlet pipe 80.
  • the parallel flow path 86 then runs through the cavity 52 , as indicated by arrowheads 94 and then enters through the inlet openings 84 into the outlet pipe.
  • the bubble membrane has an elongated shape with a substantially cylindrical outer surface and a hemispherical end face. As a result, the flow in the parallel flow path largely fills the cross section of the cavity 52. This ensures a good exchange of the drinking water in the cavity.
  • the drinking water in the parallel flow path 86 then flows into the return channel 78, which opens coaxially in the outlet 72.
  • the return channel forms a nozzle 96.
  • the main flow of the tapped drinking water from the passage 76 flows around the nozzle 96 essentially coaxially. This causes an injector effect.
  • a suction is generated in the return channel 78. This suction causes the secondary flow in the parallel flow path 86 and thus the water exchange in the cavity 52 of the expansion vessel.
  • the first part 98 of the flow part 88 of the parallel flow path 86 and the return duct 78 can be shut off at the same time.
  • the first valve means 98 are best seen in Fig.4.
  • the first valve means 98 contain a ball valve 100 with a valve ball 102.
  • the valve ball 102 is rotatably mounted between two annular valve seats 104 and 106 with spherical bearing surfaces.
  • the cavity-side valve seat 104 consists of two concentric valve seat rings 108 and 110, which are connected to one another by radial webs 112.
  • the outer valve seat ring 110 is sealingly inserted into the bore of the connecting piece 60 and is supported on an inner shoulder 116.
  • the outer valve seat ring 110 is held by a pressure piece 118 screwed into the bore of the connection piece 60. Between the valve seat rings 108 and 110, an annular passage, only interrupted by the webs 112, is formed. The annular passage is sealed against the central passage within the valve seat ring 108. This central passage forms part of the return channel 78.
  • the valve ball 100 has a central through bore 120.
  • the through bore 120 is aligned with the return channel 78 and the central passage within the valve seat ring 108.
  • Slits 122 and 124 are provided in the valve ball 100 on both sides of the through bore 120.
  • the center planes of the slots 122 and 124 coincide and through the axis of the through bore 120.
  • the slots 122 and 124 are best seen in Figure 2.
  • the slots 122 and 124 are connected to the channel 90 of the connection fitting 58 and form a section of the flow part 88 of the parallel flow path 86.
  • the slots 122 and 124 are accordingly also connected to the annular passage between the two valve seat rings 108 and 110.
  • an adjusting spindle 126 also engages in the slot 122, through which the valve ball 100 can be rotated about a horizontal axis lying in the paper plane of FIGS. 1 and 3.
  • the adjusting spindle 126 is rotatably mounted in a jacket-shaped extension 128 of the connection fitting 58.
  • a rotary handle 130 is attached to the adjusting spindle 126.
  • the valve ball 100 can be rotated into the position shown in FIG. 2 by means of the adjusting spindle.
  • the adjusting spindle 126 contains radial bores 132 which are connected to a longitudinal bore 134.
  • the longitudinal bore 134 communicates with an outlet 138 via a test valve 136.
  • the radial bores 132 open into an annular groove 140 of the adjusting spindle 126.
  • a channel 142 opens, which starts from the flow part 88 of the parallel flow path 86 on the cavity side from the ball valve 98.
  • an insert 146 provided with outer ribs 144 is fastened by means of a locking ring 148.
  • the outer ribs 144 are seated on the pressure piece 118 and bear against the inner edge of the sealing ring 68.
  • the connection fitting 58 is also tightened against the housing 40. This has the effect that a pipe section 150, which is located in the valve-side end of the outlet pipe 80 and forms a section of the return channel 78, is tightened against the inner valve seat ring 108.
  • Fig. 4 shows a modified version of the connection fitting.
  • the construction of the expansion tank is the same as in the embodiment according to Fig. 1 to 3.
  • housing 152 the housing of the connection fitting is designated 152.
  • Housing 152 has an inlet 154 and an outlet 156 aligned therewith. From the inlet, perpendicular to the axis of inlet 154 and outlet 156, there is a flow channel 158 in housing 152.
  • the flow channel 158 forms part of a flow path to the cavity of the expansion vessel and communicates with the annular space 160 between a connecting piece 162 of the housing 152 and a pipe piece 166 surrounding the return channel 164.
  • the housing 152 also forms a return channel 168, which is connected to the return channel 164 in the pipe section 166 via a bore 170 of a ball valve 172.
  • the housing forms a venturi 174 in line with inlet 154 and outlet 156 and downstream from the branch of flow channel 158.
  • a direct flow path 176 extends from inlet 154 to outlet 156 via venturi 174. This flow path 176 bypasses the cavity of the expansion vessel .
  • a baffle plate 178 is arranged in the flow path 176. This baffle plate 178 is located upstream of the Venturi nozzle 174 in the region of the feed channel 158.
  • the baffle plate 178 projects from the wall of the housing 152 opposite the feed channel 158 and extends perpendicular to the axis of the inlet 154 Baffle plate 178 essentially through the axis of the flow channel 158.
  • the baffle plate 178 extends over most of the cross section of the inlet 154. As a result, the water flow is first deflected in the direction of the flow channel 158. The greater part of the water flow then flows through the Venturi nozzle directly to the outlet 156, and only a partial flow flows through the cavity of the expansion vessel.
  • the return channel 168 of the housing 152 is connected to the venturi nozzle 174 via a suction opening 180.
  • a water flow is sucked in via the Venturi nozzle 174 and the suction opening 180 and flows through the cavity of the expansion vessel in the manner described in connection with FIGS. 1 to 3.
  • the ball valve 172 essentially corresponds in structure and function to the ball valve 100 from FIGS. 2 to 4 and is therefore not described again in detail here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Fluid Mechanics (AREA)
  • Public Health (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Cookers (AREA)
  • Thermally Insulated Containers For Foods (AREA)
  • Taps Or Cocks (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

An expansion vessel for heated drinking water has a hollow space (52) which is closed off by a membrane (42) and is connected to a drinking-water heater. A compressed-gas space (54), bounded by a housing (40), adjoins the hollow space (52). The connector assembly (58) is constructed, for connection of the hollow space (52) to an inlet (70) and for direct connection of the inlet (70) to an outlet (72), in such a way that a drinking-water current is generated through the hollow space (52) when hot drinking water is drawn off. For this purpose, the connector assembly (58) has a direct flow passage (76), passing the hollow space (52), between inlet (70) and outlet (72) and furthermore establishes a flow path (86) which runs, in terms of flow, parallel to the direct flow passage (76) and through the hollow space (52). Arranged in this parallel flow path (86) is a suction device (96), by which a suction can be generated by means of the flow of drinking water flowing in the direct flow path, which suction is used to be able to generate, when drinking water is drawn off, a flow via the parallel flow path (86), through the hollow space (52), into a downstream part (72) of the direct flow path. <IMAGE>

Description

Technisches GebietTechnical field

Die Erfindung betrifft ein Ausdehnungsgefäß für erwärmtes Trinkwasser in Verbindung mit einer Anschlußarmatur, enthaltend einen von einer Membran abgeschlossenen Hohlraum, der mit einem Trinkwasser-Erwärmer in Verbindung steht, und einen an den Hohlraum angrenzenden, von einem Gehäuse begrenzten Druckgasraum, bei welchem die Anschlußarmatur zur Verbindung des Hohlraumes mit einem Einlaß und und zur Verbindung des Einlasses mit einem Auslaß so ausgebildet ist, daß ein Trinkwasserstrom durch den Hohlraum beim Zapfen von warmem Trinkwasser erzeugt wird.The invention relates to an expansion vessel for heated drinking water in connection with a connection fitting, containing a cavity closed by a membrane, which is in communication with a drinking water heater, and an adjacent to the cavity, bounded by a housing, in which the connection fitting for Connection of the cavity to an inlet and and for connecting the inlet to an outlet is designed so that a drinking water flow is generated through the cavity when tapping warm drinking water.

Zugrundeliegender Stand der TechnikUnderlying state of the art

Es gibt Trinkwassererwärmer, bei denen das zu erwärmende Trinkwasser in einem geschlossenen Behälter, z.B. durch Wärmeaustausch mit Heizungswasser, erwärmt wird. Bei der Erwärmung dehnt sich das Trinkwasser aus. Dieser Ausdehnung muß Rechnung getragen werden. Zu diesem Zweck wird üblicherweise über ein Membran-Sicherheitsventil Wasser abgelassen. Das erfordert einen Abfluß für das austretende Ausdehnungswasser. Das Volumen des dabei verlorengehenden Ausdehnungswassers kann bei einem Vierpersonenhaushalt je nach Installation und Größe des Trinkwassererwärmers bis zu zehn Liter pro Tag betragen. Das summiert sich zu erheblichen Verlusten an Wasser und Energie.There are drinking water heaters in which the drinking water to be heated is heated in a closed container, for example by exchanging heat with heating water. When it heats up, the drinking water expands. This expansion must be taken into account. For this purpose, water is usually drained through a membrane safety valve. This requires a drain for the escaping expansion water. The volume of the expansion water lost in this way can be up to four in a four-person household, depending on the installation and size of the DHW cylinder amount to ten liters per day. That adds up to significant losses in water and energy.

Es ist daher bekannt, Ausdehnungsgefäße mit dem System des Trinkwassererwärmers zu verbinden, welche das Ausdehnungswasser aufnehmen. Bekannte Geräte dieser Art enthalten eine Blasenmembran, die in einem druckgasgefüllten Gehäuse angeordnet ist. Der Rand einer Einlaßöffnung der Blasenmembran ist mit dem Rand einer Einlaßöffnung des Gehäuses verbunden. Die Einlaßöffnungen stehen mit dem System des Trinkwassererwärmers in Verbindung. In den Raum zwischen Blasenmembran und Gehäuse ist über ein Füllventil Druckgas eingefüllt.It is therefore known to connect expansion vessels to the system of the drinking water heater which receive the expansion water. Known devices of this type contain a bubble membrane, which is arranged in a pressurized gas-filled housing. The edge of an inlet opening of the bladder membrane is connected to the edge of an inlet opening of the housing. The inlet openings are connected to the system of the drinking water heater. Compressed gas is filled into the space between the bladder membrane and the housing via a filling valve.

Diese Ausdehnungsgefäße sind für Trinkwassererwärmer aus hygienischen Gründen problematisch. Sie enthalten nämlich ein stagnierendes und nicht ausgetauschtes Wasservolumen.These expansion vessels are problematic for drinking water heaters for hygienic reasons. They contain a stagnant and not exchanged volume of water.

Zur Vermeidung dieser Nachteile ist es bekannt (DE-U-8507707.1), an dem Ausdehnungsgefäß zwei Anschlußöffnungen im Abstand nebeneinander vorzusehen und an der Innenseite des Ausdehnungsgefäßes über ein Zwischenstück zwischen den beiden Anschlußöffnungen ein tellerförmiges Element zu befestigen. Das tellerförmige Element bildet mit der Wandung des Ausdehnungsgefäßes einen Spalt Auf diese Weise muß das Wasser auf dem Weg von der einen Anschlußöffnung zu der anderen durch den Spalt hinaus in das Ausdehnungsgefäß, durch das Volumen des Ausdehnungsgefäßes hindurch und durch den Spalt zu der auslaßseitigen Anschlußöffnung fließen. Dadurch wird die Bildung einer Kammer mit stillstehendem, sich beim Durchfluß nicht erneuernden Wasser vermieden. Bei dem bekannten Ausdehnungsgefäß fließt alles gezapfte Wasser durch das Ausdehnungsgefäß. An dem Ausdehnungsgefäß tritt daher ein Druckverlust auf.To avoid these disadvantages, it is known (DE-U-8507707.1) to provide two connection openings at a distance from one another on the expansion vessel and to fasten a plate-shaped element on the inside of the expansion vessel via an intermediate piece between the two connection openings. The plate-shaped element forms a gap with the wall of the expansion vessel. In this way, the water must flow on the way from one connection opening to the other through the gap into the expansion vessel, through the volume of the expansion vessel and through the gap to the outlet-side connection opening . This avoids the formation of a chamber with still water that does not renew when it flows through. In the known expansion vessel, all of the tapped water flows through the expansion vessel. A pressure loss therefore occurs at the expansion vessel.

Ein weiteres Problem bei solchen Ausdehnungsgefäßen besteht darin, daß die Wartung und Überprüfung solcher Gefäße schwierig ist. Im Betrieb wird die Blasenmembran von der Innenseite mit dem unter Betriebsdruck stehenden Trinkwasser beaufschlagt. Auf der Außenseite wirkt der Druck des Druckgases. Der Druck des Druckgases im Gehäuse müßte über das Füllventil überprüft werden. Eine reine Drucküberprüfung durch Messung des Druckes am Füllventil im Betriebszustand gestattet aber keinen Schluß auf die Funktionsfähigkeit des Ausdehnungsgefäßes, also darauf, ob in dem Gehäuse genügend Druckgas enthalten ist. Über die Membran wird nämlich ein Gasdruck aufrechterhalten, der dem Betriebsdruck des Wassers entspricht. Zur Überprüfung muß daher das Ausdehnungsgefäß von dem Trinkwassersystem abgeklemmt werden. Die Membran muß von dem Wasserdruck entlastet werden. Erst dann kann eine Druckmessung an dem Füllventil zur Überprüfung des Gaspolsters des Druckgases sinnvoll erfolgen.Another problem with such expansion vessels is that maintenance and inspection of such vessels is difficult. During operation, the bubble membrane is pressurized from the inside with the drinking water under operating pressure. The pressure of the compressed gas acts on the outside. The pressure of the compressed gas in the housing would have to be checked via the filling valve. However, a pure pressure check by measuring the pressure at the filling valve in the operating state does not allow any conclusions to be drawn about the functionality of the expansion vessel, that is to say whether there is sufficient compressed gas in the housing. A gas pressure is maintained via the membrane which corresponds to the operating pressure of the water. To check this, the expansion tank must therefore be disconnected from the drinking water system. The membrane must be relieved of the water pressure. Only then can a pressure measurement be sensibly carried out on the filling valve to check the gas cushion of the compressed gas.

Offenbarung der ErfindungDisclosure of the invention

Der Erfindung liegt die Aufgabe zugrunde, ein Ausdehnungsgefäß für Trinkwassererwärmer und eine Anschlußarmatur für ein solches Ausdehnungsgefäß so auszubilden, daß einerseits ein stagnierendes Wasservolumen vermieden wird, andererseits aber Wasser ohne wesentlichen Druckverlust gezapft werden kann.The invention has for its object to provide an expansion vessel for drinking water heaters and a connection fitting for such an expansion vessel so that on the one hand a stagnant water volume is avoided, but on the other hand water can be drawn without significant pressure loss.

Der Erfindung liegt weiter die Aufgabe zugrunde, die Überprüfung des Ausdehnungsgefäßes zu erleichtern.The invention is further based on the object of making it easier to check the expansion vessel.

Erfindungsgemäß wird die zuerst genannte Aufgabe bei einem Ausdehnungsgefäß der eingangs genannten Art in der Weise gelöst, daß die Anschlußarmatur einen an dem Hohlraum vorbeigehenden direkten Strömungs-Durchgang zwischen Einlaß und Auslaß aufweist, die Anschlußarmatur weiterhin einen strömungsmäßig parallel zu dem direkten Strömungs-Durchgang und durch den Hohlraum verlaufenden Strömungsweg herstellt und in diesem parallelen Strömungsweg eine Sogeinrichtung angeordnet ist, durch welche mittels der in dem direkten Strömungsweg fließenden Strömung von Trinkwasser ein Sog erzeugbar ist, der beim Zapfen von Trinkwasser eine Strömung über den parallelen Strömungsweg durch den Hohlraum hindurch in einen stromabwärtigen Teil des direkten Strömungsweges erzeugbar ist.According to the invention, the first-mentioned object is achieved in the case of an expansion vessel of the type mentioned at the outset in such a way that the connection fitting has a direct flow passage between the inlet which passes the cavity and has an outlet, the connection fitting also produces a flow path parallel to the direct flow passage and through the cavity and a suction device is arranged in this parallel flow path, by means of which a suction can be generated by means of the flow of drinking water flowing in the direct flow path, which when tapping drinking water, a flow can be generated via the parallel flow path through the cavity into a downstream part of the direct flow path.

Auf diese Weise entsteht ebenfalls kein stagnierendes Wasservolumen. Bei einer solchen Anordnung fließt aber der Hauptstrom des gezapften Trinkwassers direkt von dem Einlaß zum Auslaß. Lediglich ein Nebenstrom fließt durch den Hohlraum des Ausdehnungsgefäßes. Dieser Nebenstrom wird durch eine Sogeinrichtung erzwungen.In this way, there is also no stagnant water volume. With such an arrangement, however, the main stream of the tap water flows directly from the inlet to the outlet. Only a secondary flow flows through the cavity of the expansion tank. This side flow is forced by a suction device.

Eine Erleichterung der Prüfung kann dadurch erreicht werden, daß erste Ventilmittel vorgesehen sind, durch welche der parallele Strömungsweg stromauf und stromab von dem Hohlraum absperrbar sind, zweite Ventilmittel vorgesehen sind, durch welche durch welche bei eine Verbindung des Hohlraumes mit einem Prüfauslaß herstellbar ist und das Gehäuse einen Anschluß für ein Druckmeßgerät zur Messung des Gasdrucks in dem Gasdruckraum aufweist.The test can be facilitated by providing first valve means by which the parallel flow path upstream and downstream of the cavity can be shut off, second valve means by which the cavity can be connected to a test outlet, and that Housing has a connection for a pressure measuring device for measuring the gas pressure in the gas pressure chamber.

Bei einer solchen Anordnung kann der Hohlraum einlaß- und auslaßseitig von dem System abgetrennt und vom Betriebsdruck des Wassers entlastet werden. Dann kann der Druck des Druckgases unbeeinflußt von diesem Betriebsdruck über den Anschluß, praktisch das Füllventil, gemessen werden.With such an arrangement, the cavity on the inlet and outlet sides can be separated from the system and relieved of the operating pressure of the water. Then the pressure of the compressed gas can be measured unaffected by this operating pressure via the connection, practically the filling valve.

Ausgestaltungen der Erfindung sind Gegenstand der abhängigen Patentansprüche 4 bis 12.Embodiments of the invention are the subject of dependent claims 4 to 12.

Zwei Ausführungsbeispiele der Erfindung sind nachstehend unter Bezugnahme auf die zugehörigen Zeichnungen näher erläutert.Two embodiments of the invention are explained below with reference to the accompanying drawings.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Fig.1Fig. 1
zeigt einen Längsschnitt durch eine erste Ausführung der Erfindung, bei welcher beim Zapfen von Trinkwasser nur ein Nebenstrom durch den Hohlraum des Ausdehnungsgefäßes fließt und bei welcher eine bequeme Prüfung des Ausdehnungsgefäßes möglich ist.shows a longitudinal section through a first embodiment of the invention, in which when tapping drinking water only a side stream flows through the cavity of the expansion vessel and in which a convenient test of the expansion vessel is possible.
Fig.2Fig. 2
zeigt eine Einzelheit der Anordnung von Fig.1 bei einer anderen Ventilstellung.shows a detail of the arrangement of Figure 1 in another valve position.
Fig.3Fig. 3
zeigt eine Einzelheit der Anordnung von Fig.1 in vergrößertem Maßstab.shows a detail of the arrangement of Figure 1 on an enlarged scale.
Fig.4Fig. 4
zeigt eine abgewandelte Ausführung, bei welcher ein Sog durch eine Venturidüse erzeugt wird.shows a modified version, in which a suction is generated by a Venturi nozzle.
Bevorzugte Ausführungen der ErfindungPreferred embodiments of the invention

Bei der Ausführung nach Fig.l und 2 ist mit 40 ein Gehäuse eines Ausdehnungsgefäßes bezeichnet. In dem Gehäuse 40 sitzt eine als Blasenmembran 42 ausgebildete Membran. Die Blasenmembran ist ein Hohlkörper aus einem elastischen Material mit einer Einlaßöffnung 44. Die Einlaßöffnung 44 ist von einem verdickten Rand 46 umgeben. Auch das Gehäuse 40 weist eine Einlaßöffnung 48 auf. Die Einlaßöffnung ist von einem Anschlußstutzen 50 umgeben. Die Blasenmembran 42 ist mit ihrem Rand 46 um die Einlaßöffnung 48 herum an dem Gehäuse 40 befestigt.In the embodiment according to Fig.l and 2, 40 denotes a housing of an expansion vessel. In the housing 40 there is a membrane designed as a bubble membrane 42. The bladder membrane is a hollow body made of an elastic material with an inlet opening 44. The inlet opening 44 is surrounded by a thickened edge 46. The housing 40 also has an inlet opening 48. The inlet opening is surrounded by a connecting piece 50. The bladder membrane 42 is attached to the housing 40 with its edge 46 around the inlet opening 48.

Die Blasenmembran 42 bildet einen Hohlraum 52. Zwischen der Blasenmembran 42 und dem Gehäuse 40 ist ein Druckgasraum 54 gebildet. In den Druckgasraum 54 ist ein Druckgas über ein Füllventil 56 einfüllbar.The bladder membrane 42 forms a cavity 52. A compressed gas space 54 is formed between the bladder membrane 42 and the housing 40. A compressed gas can be filled into the compressed gas space 54 via a filling valve 56.

An dem Gehäuse 40 ist eine Anschlußarmatur 58 angebracht. Die Anschlußarmatur 58 hat einen Anschlußstutzen 60 mit einem Flansch 62. Auf den Anschlußstutzen 50 des Gehäuses 50 ist eine Überwurfmutter 64 geschraubt. Die Überwurfmutter 64 greift über den Flansch 60 der Anschlußarmatur 58. Die Überwurfmutter 64 weist einen Runddraht 66 auf. Dieser Runddrahr sitzt in einer Innennut der Überwurfmutter 64 und liegt an dem Flansch 62 des Anschlußstutzens 60 an. Zwischen den Anschlußstutzen 50 und 60 liegt ein Dichtring 68.A connection fitting 58 is attached to the housing 40. The connection fitting 58 has a connection piece 60 with a flange 62. A union nut 64 is screwed onto the connection piece 50 of the housing 50. The union nut 64 engages over the flange 60 of the connection fitting 58. The union nut 64 has a round wire 66. This round wire sits in an inner groove of the union nut 64 and is in contact with the flange 62 of the connecting piece 60. A sealing ring 68 lies between the connecting pieces 50 and 60.

Die Anschlußarmatur 58 weist einen Einlaß 70 und einen unmittelbar daneben angeordneten Auslaß 72 auf. Einlaß 70 und Auslaß 72 sind durch eine Trennwand 74 voneinander getrennt. In der Trennwand 74 ist ein direkter Durchgang 76 zwischen Einlaß 70 und Auslaß 72 gebildet. In den Einlaß 70 eintretendes Trinkwasser fließt überwiegend direkt von dem Einlaß 70 zum Auslaß 72. Das ist in Fig.1 durch Pfeilspitzen 77 angedeutet.The connection fitting 58 has an inlet 70 and an outlet 72 arranged directly next to it. Inlet 70 and outlet 72 are separated by a partition 74. A direct passage 76 is formed in the partition 74 between the inlet 70 and the outlet 72. Drinking water entering inlet 70 predominantly flows directly from inlet 70 to outlet 72. This is indicated in FIG. 1 by arrowheads 77.

Koaxial in dem Anschlußstutzen 60 ist in der Anschlußarmatur 58 ein Rücklaufkanal 78 gebildet. Der Rücklaufkanal 78 geht in ein damit fluchtendes Auslaßrohr 80 über. Das Auslaßrohr 80 ragt in den von der Blasenmembran 42 gebildeten Hohlraum 52 bis in dessen der Anschlußarmatur 58 und den Eintrittsöffnungen 44 und 48 abgewandten Teil hinein. Das Auslaßrohr 80 ist an seinem freien Ende durch einen Stopfen 82 abgeschlossen. Das Auslaßrohr 80 weist seitliche Einlaßöffnungen 84 auf.A return channel 78 is formed coaxially in the connecting piece 60 in the connection fitting 58. The return channel 78 merges into an outlet pipe 80 aligned therewith. The outlet pipe 80 protrudes into the Bubble membrane 42 formed cavity 52 into the part facing away from the connection fitting 58 and the inlet openings 44 and 48. The outlet pipe 80 is closed at its free end by a plug 82. The outlet pipe 80 has lateral inlet openings 84.

Von dem Einlaß 70 ist ein zu dem Durchgang 76 paralleler Stömungsweg 86 gebildet. Der parallele Strömungsweg 86 enthält einen Vorlaufteil 88 mit einem Kanal 90, dem Ringraum 92 zwischen den Stutzen 60 und 50 der Anschlußarmatur 58 bzw. des Gehäuses 40 und dem Rücklaufkanal 78 bzw. dem Auslaßrohr 80. Der parallele Strömungsweg 86 verläuft dann durch den Hohlraum 52, wie durch Pfeilspitzen 94 angedeutet ist und tritt dann durch die Einlaßöffnungen 84 in das Auslaßrohr. Die Blasenmembran hat längliche Gestalt mit einer im wesentlichen zylindrischen Mantelfläche und einer halbkugeligen Stirnfläche. Dadurch füllt die Strömung in dem parallelen Strömungsweg den Querschnitt des Hohlraumes 52 weitgehend aus. Es ist so für einen guten Austausch des Trinkwassers in dem Hohlraum gesorgt. In dem Auslaßrohr strömt das Trinkwasser in dem parallelen Strömungsweg 86 dann in den Rücklaufkanal 78, der koaxial in dem Auslaß 72 mündet.A flow path 86 parallel to the passage 76 is formed from the inlet 70. The parallel flow path 86 contains a flow part 88 with a channel 90, the annular space 92 between the connecting pieces 60 and 50 of the connection fitting 58 or the housing 40 and the return channel 78 or the outlet pipe 80. The parallel flow path 86 then runs through the cavity 52 , as indicated by arrowheads 94 and then enters through the inlet openings 84 into the outlet pipe. The bubble membrane has an elongated shape with a substantially cylindrical outer surface and a hemispherical end face. As a result, the flow in the parallel flow path largely fills the cross section of the cavity 52. This ensures a good exchange of the drinking water in the cavity. In the outlet pipe, the drinking water in the parallel flow path 86 then flows into the return channel 78, which opens coaxially in the outlet 72.

An seinem Ende bildet der Rücklaufkanal eine Düse 96. Die Düse 96 ist im wesentlichen koaxial von dem Hauptstrom des gezapften Trinkwassers aus dem Durchgang 76 umströmt. Dadurch tritt eine Injektorwirkung ein. Es wird in dem Rücklaufkanal 78 ein Sog erzeugt. Dieser Sog bewirkt den Nebenstrom in dem parallelen Strömungsweg 86 und damit den Wasseraustausch im Hohlraum 52 des Ausdehnungsgefäßes.At its end, the return channel forms a nozzle 96. The main flow of the tapped drinking water from the passage 76 flows around the nozzle 96 essentially coaxially. This causes an injector effect. A suction is generated in the return channel 78. This suction causes the secondary flow in the parallel flow path 86 and thus the water exchange in the cavity 52 of the expansion vessel.

Durch erste Ventilmittel 98 sind zugleich der Vorlaufteil 88 des parallelen Strömungsweges 86 als auch der Rücklaufkanal 78 absperrbar. Die ersten Ventilmittel 98 sind am besten aus Fig.4 ersichtlich. Die ersten Ventilmittel 98 enthalten ein Kugelventil 100 mit einer Ventilkugel 102. Die Ventilkugel 102 ist zwischen zwei ringförmigen Ventilsitzen 104 und 106 mit sphärischen Lagerflächen drehbar gelagert. Der hohlraumseitige Ventilsitz 104 besteht aus zwei konzentrischen Ventilsitzringen 108 und 110, welche durch radiale Stege 112 miteinander verbunden sind. Der äußere Ventilsitzring 110 ist mit einem Dichtring 114 abdichtend in die Bohrung des Anschlußstutzens 60 eingesetzt und auf einer Innenschulter 116 abgestützt. Der äußere Ventilsitzring 110 ist durch ein in die Bohrung des Anschlußstutzens 60 eingeschraubtes Druckstück 118 gehalten. Zwischen den Ventilsitzringen 108 und 110 ist ein ringförmiger, nur durch die Stege 112 unterbrochener Durchgang gebildet. Der ringförmige Durchgang ist gegen den zentralen Durchgang innerhalb des Ventilsitzringes 108 abgedichtet. Dieser zentrale Durchgang bildet einen Teil des Rücklaufkanals 78.The first part 98 of the flow part 88 of the parallel flow path 86 and the return duct 78 can be shut off at the same time. The first valve means 98 are best seen in Fig.4. The first valve means 98 contain a ball valve 100 with a valve ball 102. The valve ball 102 is rotatably mounted between two annular valve seats 104 and 106 with spherical bearing surfaces. The cavity-side valve seat 104 consists of two concentric valve seat rings 108 and 110, which are connected to one another by radial webs 112. The outer valve seat ring 110 is sealingly inserted into the bore of the connecting piece 60 and is supported on an inner shoulder 116. The outer valve seat ring 110 is held by a pressure piece 118 screwed into the bore of the connection piece 60. Between the valve seat rings 108 and 110, an annular passage, only interrupted by the webs 112, is formed. The annular passage is sealed against the central passage within the valve seat ring 108. This central passage forms part of the return channel 78.

Die Ventilkugel 100 weist eine zentrale Durchgangsbohrung 120 auf. In der in Fig.2 und 4 dargestellten Ventilstellung fluchtet die Durchgangsbohrung 120 mit dem Rücklaufkanal 78 und dem zentralen Durchgang innerhalb des Ventilsitzringes 108. Beiderseits der Durchgangsbohrung 120 sind in der Ventilkugel 100 Schlitze 122 und 124 angebracht. Die Mittelebenen der Schlitze 122 und 124 fallen zusammen und durch die Achse der Durchgangsbohrung 120. Die Schlitze 122 und 124 sind am besten aus Fig.2 ersichtlich. Die Schlitze 122 und 124 stehen in der Ventilstellung von Fig.1 und 3 mit dem Kanal 90 der Anschlußarmatur 58 in Verbindung und bilden einen Abschnitt des Vorlaufteils 88 des parallelen Strömungsweges 86. Die Schlitze 122 und 124 stehen dementsprechend auch in Verbindung mit dem ringförmigen Durchgang zwischen den beiden Ventilsitzringen 108 und 110.The valve ball 100 has a central through bore 120. In the valve position shown in FIGS. 2 and 4, the through bore 120 is aligned with the return channel 78 and the central passage within the valve seat ring 108. Slits 122 and 124 are provided in the valve ball 100 on both sides of the through bore 120. The center planes of the slots 122 and 124 coincide and through the axis of the through bore 120. The slots 122 and 124 are best seen in Figure 2. In the valve position of FIGS. 1 and 3, the slots 122 and 124 are connected to the channel 90 of the connection fitting 58 and form a section of the flow part 88 of the parallel flow path 86. The slots 122 and 124 are accordingly also connected to the annular passage between the two valve seat rings 108 and 110.

In den Schlitz 122 greift außerdem das Ende einer Stellspindel 126 ein, durch welche die Ventilkugel 100 um eine in der Papierebene von Fig.1 und 3 liegende, waagerechte Achse verdrehbar ist. Die Stellspindel 126 ist in einem mantelförmigen Ansatz 128 der Anschlußarmatur 58 drehbar gelagert. An der Stellspindel 126 ist ein Drehgriff 130 angebracht. Mittels der Stellspindel kann die Ventilkugel 100 in die in Fig.2 dargestellte Stellung verdreht werden.The end of an adjusting spindle 126 also engages in the slot 122, through which the valve ball 100 can be rotated about a horizontal axis lying in the paper plane of FIGS. 1 and 3. The adjusting spindle 126 is rotatably mounted in a jacket-shaped extension 128 of the connection fitting 58. A rotary handle 130 is attached to the adjusting spindle 126. The valve ball 100 can be rotated into the position shown in FIG. 2 by means of the adjusting spindle.

Die Stellspindel 126 enthält radiale Bohrungen 132, die mit einer Längsbohrung 134 in Verbindung stehen. Die Längsbohrung 134 steht über ein Prüfventil 136 mit einem Auslaß 138 in Verbindung. Die radialen Bohrungen 132 münden in einer Ringnut 140 der Stellspindel 126. In der Ringnut 140 mündet wiederum ein Kanal 142, der von dem Vorlaufteil 88 des parallelen Strömungsweges 86 hohlraumseitig von dem Kugelventil 98 ausgeht.The adjusting spindle 126 contains radial bores 132 which are connected to a longitudinal bore 134. The longitudinal bore 134 communicates with an outlet 138 via a test valve 136. The radial bores 132 open into an annular groove 140 of the adjusting spindle 126. In the annular groove 140, in turn, a channel 142 opens, which starts from the flow part 88 of the parallel flow path 86 on the cavity side from the ball valve 98.

An dem Auslaufrohr 80 ist eine mit Außenrippen 144 versehene Einstecktülle 146 mittels eines Sicherungsringes 148 befestigt. Die Außenrippen 144 sitzen auf dem Druckstück 118 auf und liegen an dem Innenrand des Dichtringes 68 an. Beim Anziehen der Überwurfmutter 64 wird das Auslaßrohr 80 zwischen Druckstück 118 und Dichtring 68 festgeklemmt. Dabei wird auch die Anschlußarmatur 58 gegen das Gehäuse 40 festgezogen. Das bewirkt, daß ein in dem armaturseitigen Ende des Auslaßrohres 80 sitzendes Rohrstück 150, das einen Abschnitt des Rücklaufkanals 78 bildet, gegen den inneren Ventilsitzring 108 festgezogen wird.On the outlet pipe 80, an insert 146 provided with outer ribs 144 is fastened by means of a locking ring 148. The outer ribs 144 are seated on the pressure piece 118 and bear against the inner edge of the sealing ring 68. When tightening the union nut 64, the outlet pipe 80 is clamped between the pressure piece 118 and the sealing ring 68. The connection fitting 58 is also tightened against the housing 40. This has the effect that a pipe section 150, which is located in the valve-side end of the outlet pipe 80 and forms a section of the return channel 78, is tightened against the inner valve seat ring 108.

Fig.4 zeigt eine abgewandelte Ausführung der Anschlußarmatur. Die Konstruktion des Ausdehnungsgefäßes ist die gleiche wie bei der Ausführung nach Fig.1 bis 3.Fig. 4 shows a modified version of the connection fitting. The construction of the expansion tank is the same as in the embodiment according to Fig. 1 to 3.

Bei der Ausführung nach Fig.4 ist mit 152 das Gehäuse der Anschlußarmatur bezeichnet. Das Gehäuse 152 weist einen Einlaß 154 und einen damit fluchtenden Auslaß 156 auf. Von dem Einlaß geht, senkrecht zur Achse von Enlaß 154 und Auslaß 156, in dem Gehäuse 152 ein Vorlaufkanal 158 ab. Der Vorlaufkanal 158 bildet einen Teil eines Vorlaufweges zu dem Hohlraum des Ausdehnungsgefäßes und steht mit dem Ringraum 160 zwischen einem Anschlußstutzen 162 des Gehäuses 152 und einem den Rücklaufkanal 164 umschließenden Rohrstück 166 in Verbindung. Das Gehäuse 152 bildet auch einen Rücklaufkanal 168, der mit dem Rücklaufkanal 164 in dem Rohrstück 166 über eine Bohrung 170 eines Kugelventils 172 in Verbindung steht.4, the housing of the connection fitting is designated 152. Housing 152 has an inlet 154 and an outlet 156 aligned therewith. From the inlet, perpendicular to the axis of inlet 154 and outlet 156, there is a flow channel 158 in housing 152. The flow channel 158 forms part of a flow path to the cavity of the expansion vessel and communicates with the annular space 160 between a connecting piece 162 of the housing 152 and a pipe piece 166 surrounding the return channel 164. The housing 152 also forms a return channel 168, which is connected to the return channel 164 in the pipe section 166 via a bore 170 of a ball valve 172.

Das Gehäuse bildet eine Venturidüse 174 fluchtend mit dem Einlaß 154 und dem Auslaß 156 und stromab von der Abzweigung des Vorlaufkanals 158. Über die Venturidüse 174 verläuft ein direkter Stömungsweg 176 von dem Einlaß 154 zu dem Auslaß 156. Dieser Strömungsweg 176 umgeht den Hohlraum des Ausdehnungsgefäßes. In dem Strömungsweg 176 ist eine Prallplatte 178 angeordnet. Diese Prallplatte 178 sitzt stromauf von der Venturidüse 174 im Bereich des Vorlaufkanals 158. Die Prallplatte 178 springt von der dem Vorlaufkanal 158 gegenüberliegenden Wandung des Gehäuses 152 vor und erstreckt sich senkrecht zur Achse des Einlasses 154. Bei der dargestellten, bevorzugten Ausführung verläuft die Ebene der Prallplatte 178 im wesentlichen durch die Achse des Vorlaufkanals 158. Die Prallplatte 178 erstreckt sich über den größten Teil des Querschnittes des Einlasses 154. Dadurch wird der Wasserstrom zunächst in Richtung des Vorlaufkanals 158 umgelenkt. Der größere Teil des Wasserstromes fließt dann aber über die Venturidüse direkt zum Auslaß 156, und nur ein Teilstrom fließt durch den Hohlraum des Ausdehnungsgefäßes.The housing forms a venturi 174 in line with inlet 154 and outlet 156 and downstream from the branch of flow channel 158. A direct flow path 176 extends from inlet 154 to outlet 156 via venturi 174. This flow path 176 bypasses the cavity of the expansion vessel . A baffle plate 178 is arranged in the flow path 176. This baffle plate 178 is located upstream of the Venturi nozzle 174 in the region of the feed channel 158. The baffle plate 178 projects from the wall of the housing 152 opposite the feed channel 158 and extends perpendicular to the axis of the inlet 154 Baffle plate 178 essentially through the axis of the flow channel 158. The baffle plate 178 extends over most of the cross section of the inlet 154. As a result, the water flow is first deflected in the direction of the flow channel 158. The greater part of the water flow then flows through the Venturi nozzle directly to the outlet 156, and only a partial flow flows through the cavity of the expansion vessel.

Der Rücklaufkanal 168 des Gehäuses 152 ist mit der Venturidüse 174 über eine Saugöffnung 180 verbunden. Über die Venturidüse 174 und die Saugöffnung 180 wird eine Wasserströmung angesaugt, die in der im Zusammenhang mit Fig.1 bis 3 beschriebenen Weise durch den Hohlraum des Ausdehnungsgefäßes fließt. Das Kugelventil 172 entspricht in Aufbau und Funktion im wesentlichen dem Kugelventil 100 von Fig.2 bis 4 und ist daher hier nicht noch einmal im einzelnen beschrieben.The return channel 168 of the housing 152 is connected to the venturi nozzle 174 via a suction opening 180. A water flow is sucked in via the Venturi nozzle 174 and the suction opening 180 and flows through the cavity of the expansion vessel in the manner described in connection with FIGS. 1 to 3. The ball valve 172 essentially corresponds in structure and function to the ball valve 100 from FIGS. 2 to 4 and is therefore not described again in detail here.

Claims (11)

  1. Expansion vessel for heated drinking water in combination with a connection fitting (58) comprising
    (a) a cavity (52) closed by a diaphragm (42), the cavity communicating with a drinking water heater,
    (b) a pressurized gas chamber adjacent to the cavity (52) and defined by a housing (40),
    wherein
    (c) the connection fitting (58) for connecting the cavity (52) with an inlet (70) and for connecting the inlet (70) with an outlet (72) is designed in such a way that a drinking water flow through the cavity is generated, when hot drinking water is drawn,
    characterized in that
    (d) the connection fitting (58) has a direct flow passage (76) extending between inlet (70) and outlet (72) and by-passing the cavity (52),
    (e) the connection fitting (58), furthermore, establishes a flow path (86) passing parallel, with respect to the flow, to the direct flow passage (76) and through the cavity (86), and
    (f) a suction device (96) is arranged in this parallel flow path (86) to generate a suction by means of the flow of drinking water flowing in the direct flow passage, whereby a flow through the parallel flow path (86) through the cavity (52) into the downstream portion (72) of the direct flow passage is generated, when drinking water is drawn.
  2. Expansion vessel as claimed in claim 1, characterized in that
    (a) first valve means (98) are provided which are adapted to shut-off the parallel flow path downstream of the cavity (52),
    (b) second valve means (136) are provided which are adapted to establish communication between the cavity (52) and a test outlet (138), and
    (c) the housing (40) has a port (56) for connecting a pressure gauge for measuring the gas pressure in the pressurized gas chamber (54).
  3. Expansion vessel as claimed in claim 2, characterized in that
    (a) the cavity (52) is defined by a bladder diaphragm (42), which, with a rim (46) defining an inlet port (44), is retained around an inlet port (48) in the housing (40) surrounding the bladder diaphragm (42),
    (b) an inlet (70) of the connection fitting (58) is, on one hand, connected directly with an outlet (72) and, on the other hand, communicates with the inlet port (48) of the housing (40),
    (c) an outlet tube (80) extends through the inlet ports (48,44) of the housing (40) and of the bladder diaphragm (42) into the portion of the cavity (52) remote from the inlet ports (48,44) and has at least one inlet opening (84) there, and
    (d) the outlet tube (80) communicates with a return-flow passage (78), which extends with an injector nozzle (96) into the outlet passage (78) of the connection fitting (58).
  4. Expansion vessel as claimed in claim 3, characterized in that the parallel flow path (86) extends from the inlet (70) of the connection fitting (58) to the cavity (52) coaxially with the return-flow passage (78) and the outlet tube (80) aligned therewith.
  5. Expansion vessel as claimed in claims 2 and 4, characterized in that the first valve means are a ball valve (98) which is arranged to simultaneously shut off both the return-flow passage (78) and the forward-flow portion of the parallel flow path (86) coaxial therewith.
  6. Expansion vessel as claimed in claim 5, characterized in that
    (a) the ball valve (98) is mounted in the connection fitting (58) between two annular valve seats (104,106),
    (b) the cavity-side valve seat (104) is formed of two valve seat rings (108,110) interconnected by radial webs (112),
    (c) a valve ball (100) of the ball valve (98) has a central through-bore (120) and a lateral slot (124) separate therefrom, the forward-flow portion of the parallel flow path (86) passes through this slot (124) between the valve seat rings (108,110) of the cavity-side valve seat (104).
  7. Expansion vessel as claimed in claim 6, characterized in that the valve ball (100) has a second lateral slot (122) which is engaged by an actuating spindle (126) rotatably mounted in the connection fitting (58).
  8. Expansion vessel as claimed in claim 7, characterized in that
    (a) the actuating spindle (126) is formed with a lateral port (132) and a longitudinal passage (134) communicating therewith,
    (b) the lateral port (132), through an annular passage (140) communicates with a passage (142) which, in turn, is connected, on the cavity side of the ball valve (98), to the forward-flow portion (88) of the parallel flow path (86) extending coaxial with the return-flow passage (78),
    (c) the longitudinal passage (134) communicates with an outlet (138), which is governed by a test valve (136) representing the second valve means.
  9. Expansion vessel as claimed in claim 1, characterized in that the suction device is a venturi nozzle arranged in the direct flow passage, the flow path passing through the cavity opening in the venturi nozzle.
  10. Expansion vessel as claimed in claim 9, characterized in that a baffle plate is arranged in the flow path upstream of the venturi nozzle.
  11. Expansion vessel as claimed in claim 10, characterized in that
    (a) a housing of the connection fitting has an inlet and an outlet aligned therewith,
    (b) a forward-flow passage branches off in the housing from the inlet orthogonal to the axis of inlet and outlet, the forward-flow passage communicating with the cavity,
    (c) the venturi nozzle is defined in the housing in alignment with inlet and outlet and downstream of the forward-flow passage and is connected through a suction port with a return-flow passage defined in the housing, and
    (d) the baffle plate projects, in the region of the forward-flow passage, from the housing wall opposite the forward-flow passage.
EP93119100A 1992-12-12 1993-11-26 Expansion vessel for domestic hot water in connection with a connector assembly Expired - Lifetime EP0602430B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4242036A DE4242036B4 (en) 1992-12-12 1992-12-12 Connection fitting for connecting an expansion tank
DE4242036 1992-12-12

Publications (2)

Publication Number Publication Date
EP0602430A1 EP0602430A1 (en) 1994-06-22
EP0602430B1 true EP0602430B1 (en) 1996-07-17

Family

ID=6475153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119100A Expired - Lifetime EP0602430B1 (en) 1992-12-12 1993-11-26 Expansion vessel for domestic hot water in connection with a connector assembly

Country Status (6)

Country Link
EP (1) EP0602430B1 (en)
AT (1) ATE140527T1 (en)
DE (2) DE4242036B4 (en)
DK (1) DK0602430T3 (en)
ES (1) ES2090825T3 (en)
GR (1) GR3021381T3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988218A (en) * 1997-06-10 1999-11-23 Hans Sasserath & Co. Kg Connection fitting for connecting a pressure expansion vessel for heated drinking water
DE19818281C2 (en) * 1998-01-19 2003-08-14 Fimcim Srl Expansion vessel control valve unit for warm drinking water
DE202008010289U1 (en) 2008-08-01 2009-12-17 Interforge Klee Gmbh Ball valve with T-connection
DE102014009378A1 (en) 2014-06-23 2015-12-24 Jens Kerkhoff Pressure-balancing device

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19529959C2 (en) * 1995-08-14 2000-05-18 Reflex Winkelmann & Pannhoff G Connection fitting for connecting a diaphragm expansion vessel to a pipe network
NL1001915C2 (en) * 1995-12-15 1997-06-17 Flamco Bv Expansion vessel.
DE19609375C1 (en) * 1996-02-29 1997-06-12 Otto Heat Heizungs Connecting fitment for expansion vessel in water supplies
FR2750760A1 (en) * 1996-07-08 1998-01-09 Comap Expansion tank for hot water piping
NL1003615C2 (en) * 1996-07-16 1998-01-21 Flamco Bv Valve with pivoting shutter
DE19733982C1 (en) * 1997-08-06 1998-10-01 Winkelmann & Pannhoff Gmbh Expansion tank for heating equipment
DE19742047A1 (en) 1997-09-24 1999-03-25 Sasserath & Co Kg H Connection fitting for connecting a pressure expansion vessel to a line system
DE19826882C2 (en) * 1998-06-17 2001-08-30 Reflex Winkelmann & Pannhoff G Diaphragm expansion vessel
FR2795490B1 (en) * 1999-06-25 2001-09-28 Watts Eurotherm Sa MEANS FOR HYDRAULIC CONNECTION OF AN EXPANSION VESSEL AND EXPANSION VESSEL PROVIDED WITH SAID MEANS
DE10259664B4 (en) * 2002-12-18 2007-01-04 Hans Sasserath & Co. Kg Device arrangement for a domestic installation
CN100458299C (en) * 2006-05-12 2009-02-04 艾欧史密斯(中国)热水器有限公司 Energy-saving safety electric water heater with layered thermal insulation chamber
DE202008016920U1 (en) 2008-12-23 2010-05-20 Hans Sasserath & Co. Kg Fitting arrangement for drinking water heaters
CH702905A1 (en) * 2010-03-26 2011-09-30 Olaer Schweiz Ag Pressure compensating device for liquid flowed through systems.
DE202013004858U1 (en) 2013-05-28 2014-09-01 Hans Sasserath Gmbh & Co. Kg Safety group with expansion tank
DE102016106061A1 (en) * 2016-04-04 2017-10-05 Sinusverteiler Gmbh Connection unit for connecting a pressure maintenance and / or degassing device with a heating circuit manifold of a heating system
GB2555425B (en) * 2016-10-26 2019-06-26 Vexo International Uk Ltd Expansion vessel for a heating or cooling system
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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094143A (en) * 1960-06-23 1963-06-18 Beach T Arnold Combination expansion tank valve
DE1454680A1 (en) * 1962-02-22 1969-02-20 Forbach Gmbh & Co Kg Hot water tank
DE1270259B (en) * 1967-07-28 1968-06-12 Junkers & Co Elongated cylindrical expansion vessel in which an elastic bladder membrane delimiting a gas-filled space is arranged
DE8507701U1 (en) * 1985-03-15 1985-06-20 Flamco B.V., Gouda Expansion tank
DE8507703U1 (en) * 1985-03-15 1985-08-01 Flamco B.V., Gouda Connection piece for an expansion tank
DE4008026A1 (en) * 1990-03-10 1991-09-12 Otto Geb Kg Pressure buffer for water supply etc. - consists of outer container moulded in two halves joined together and inner pressurised nitrogen reservoir enclosed in diaphragm
DE4103285A1 (en) * 1991-02-04 1992-08-06 Kupec Werner Excess pressure collecting vessel for water - is washed through to prevent foul water or bacteria accumulating, using separate inlet and outlet and membrane bearing against pressure plate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988218A (en) * 1997-06-10 1999-11-23 Hans Sasserath & Co. Kg Connection fitting for connecting a pressure expansion vessel for heated drinking water
DE19818281C2 (en) * 1998-01-19 2003-08-14 Fimcim Srl Expansion vessel control valve unit for warm drinking water
DE202008010289U1 (en) 2008-08-01 2009-12-17 Interforge Klee Gmbh Ball valve with T-connection
EP2149729A1 (en) 2008-08-01 2010-02-03 Interforge Klee GmbH Ball valve with T connection
DE102014009378A1 (en) 2014-06-23 2015-12-24 Jens Kerkhoff Pressure-balancing device

Also Published As

Publication number Publication date
DE4242036A1 (en) 1994-06-16
ES2090825T3 (en) 1996-10-16
DE59303258D1 (en) 1996-08-22
EP0602430A1 (en) 1994-06-22
DK0602430T3 (en) 1996-12-02
GR3021381T3 (en) 1997-01-31
DE4242036B4 (en) 2004-04-15
ATE140527T1 (en) 1996-08-15

Similar Documents

Publication Publication Date Title
EP0602430B1 (en) Expansion vessel for domestic hot water in connection with a connector assembly
EP1681520B1 (en) Backflow prevention assembly
DE102005006790B4 (en) Valve arrangement with pressure-dependent controlled valve
EP0884539B1 (en) Connector assembly for connecting an expansion vessel for hot sanitary water
DE3809288C1 (en) Shut-off valve for a measuring device
DE3826064C2 (en)
DE2916522A1 (en) BRANCH DEVICE
EP0566920A1 (en) Security group for a water heater
EP1649201B2 (en) Multiport valve
EP0221464B1 (en) Combination valve for a feed conduit
EP0905454B1 (en) Connector assembly for connecting an expansion vessel to a circuit
DE2424839A1 (en) Measuring instrument attaching adaptor block - incorporates suitable fixing holes and flow channels
DE60006546T2 (en) CONNECTION FOR A WATER METER
DE3539463C2 (en)
DE3937778C2 (en) Alarm valve station
DE3930579C2 (en)
DE3830660A1 (en) Distributor fitting
EP0255936A1 (en) Interconnection device for incorporation into the water supply line
DE3026463A1 (en) T=Piece for meter attachment to hot water pipe - has single valve for closing main passage and branch to meter
DE4015107C2 (en)
EP1189700A1 (en) Container
DE20005596U1 (en) Distribution center for drinking water installations
CH691504A5 (en) Connection device.
DE19522198A1 (en) Valve with spindle rod
DE9201362U1 (en) Valve connection part for water meter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 19940608

17Q First examination report despatched

Effective date: 19950718

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

REF Corresponds to:

Ref document number: 140527

Country of ref document: AT

Date of ref document: 19960815

Kind code of ref document: T

ET Fr: translation filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: 69145

REF Corresponds to:

Ref document number: 59303258

Country of ref document: DE

Date of ref document: 19960822

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: TROESCH SCHEIDEGGER WERNER AG

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2090825

Country of ref document: ES

Kind code of ref document: T3

SC4A Pt: translation is available

Free format text: 960722 AVAILABILITY OF NATIONAL TRANSLATION

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19961018

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2090825

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3021381

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Effective date: 19970531

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20031117

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20031118

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20031120

Year of fee payment: 11

Ref country code: IE

Payment date: 20031120

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20031121

Year of fee payment: 11

Ref country code: CH

Payment date: 20031121

Year of fee payment: 11

Ref country code: LU

Payment date: 20031121

Year of fee payment: 11

Ref country code: ES

Payment date: 20031121

Year of fee payment: 11

Ref country code: DK

Payment date: 20031121

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20031124

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20031127

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20041122

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041126

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041127

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050526

BERE Be: lapsed

Owner name: HANS *SASSERATH & CO. K.G.

Effective date: 20041130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050602

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050729

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Effective date: 20050526

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051126

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20041127

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

BERE Be: lapsed

Owner name: HANS *SASSERATH & CO. K.G.

Effective date: 20041130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071127

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20071123

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080128

Year of fee payment: 15

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20081126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081126