EP2072823A2 - Rotary pump with venting arrangement - Google Patents

Rotary pump with venting arrangement Download PDF

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Publication number
EP2072823A2
EP2072823A2 EP08021509A EP08021509A EP2072823A2 EP 2072823 A2 EP2072823 A2 EP 2072823A2 EP 08021509 A EP08021509 A EP 08021509A EP 08021509 A EP08021509 A EP 08021509A EP 2072823 A2 EP2072823 A2 EP 2072823A2
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EP
European Patent Office
Prior art keywords
separation chamber
pump
chamber
pump according
liquid
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Application number
EP08021509A
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German (de)
French (fr)
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EP2072823A3 (en
EP2072823B1 (en
Inventor
Thomas Müller
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Wilo SE
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Wilo AG
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Filing date
Publication date
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Publication of EP2072823A3 publication Critical patent/EP2072823A3/en
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Publication of EP2072823B1 publication Critical patent/EP2072823B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour

Definitions

  • the invention relates to a centrifugal pump with a through-flow of the liquid to be conveyed, arranged in the flow direction in front of the pump chamber separation chamber.
  • the object of the invention is to improve the separation chamber upstream of a centrifugal pump in such a way that with small external dimensions a high venting performance can be achieved.
  • a low volume of the separation chamber can be achieved with high venting performance, so that the overall external dimensions of the venting device and the pump are low.
  • a particularly early and safe separation of the gas bubbles from the liquid is achieved in that the upper vent of the separation chamber is surrounded by a tube which projects down into the separation chamber.
  • the pipe length can be 1 ⁇ 4 to 1 ⁇ 2 of the height of the separation chamber.
  • the separation chamber is connected to the pump chamber via a channel which branches off laterally from the separation chamber, in particular at the level of the tube, and opens at the suction opening of the pump impeller.
  • the liquid inlet of the separation chamber is arranged on its underside and stationary guide vanes in particular have a guide vane ring.
  • a particularly stable cyclone is produced in the separation chamber and, moreover, the outer dimensions are reduced since a lateral inflow is not required.
  • the inlet of the separation chamber is arranged on its underside and in this case forms the suction nozzle of the pump.
  • the upper vent opening of the separation chamber leads to a vent chamber arranged above the separation chamber, wherein an automatic venting takes place.
  • the upper venting chamber may have a float which can be dismantled upwards.
  • the housing of the degassing device in particular of the separation chamber, is integrally connected to the housing of the pump so that the pump and the venting device form a unit.
  • a centrifugal pump 1 which is used in particular for circulating the heating water in heating systems, has within a pump housing 2 a spiral space 3, in which a pump impeller 1a is mounted.
  • the pump impeller can be driven by an electric motor, not shown, which can be fastened with its motor housing to a connection surface 4 of the housing 2.
  • a coaxial to the pump impeller 5 opens at the suction port of the pump impeller 1 a, so that the pump 1 promotes from the channel 5 to the discharge nozzle 6, which is connected to the spiral space 3.
  • the discharge nozzle 6 is arranged on the upper side of the pump with a preferably vertical axis and has an external thread 7.
  • a ventilation device 8 is laterally formed with its housing 9, so that the two housings 2, 9 are in one piece.
  • the housing 9 forms a lower separation chamber 10, in which the incoming liquid in particular water forms a cyclone, so that the space 10 can also be called a "cyclone chamber”.
  • the separation chamber 10 has a lower liquid inlet 11, whose cross section is circular and corresponds to the cross section of the separation chamber 10. In this case, the inlet 11 goes down into the suction nozzle 12, which simultaneously forms the suction nozzle of the pump.
  • the opening 16 is surrounded by a central coaxial tube 17, which is open at the bottom and thus projects down into the space 10 to safely receive the accumulating in the middle of the cyclone gas bubbles and to lead upward into a vent chamber 18.
  • the length of the tube (17) is 1 ⁇ 4 to 1 ⁇ 2 height of the separation chamber, preferably at least the height of the inlet 20 of the channel 5.
  • a float 19 is mounted for automatic venting.
  • the parts 11 to 19 are arranged coaxially to each other.
  • the freed from the air bubbles liquid passes through an upper, arranged on the separation chamber 10 outlet opening 20 in a horizontal channel 5, which connects the separation chamber 10 with the spiral space 3, wherein the channel 5 opens at the suction opening of the pump impeller.
  • the axis of the pressure port 6 is arranged parallel to the axis of the suction nozzle 12 and the separation chamber 10, so that a simple attachment in pipes is made possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The pump has a cylindrical separation chamber arranged in front of a pump chamber in a flow direction, where fluid to be conveyed flows through the separation chamber. The separation chamber is cylindrically formed in a perpendicular axis. A fluid inlet has a conductive surface and/or a tangential arrangement for forming a fluid cyclone in the separation chamber, where the conductive surface guides the fluid. The separation chamber has an upper central venting opening. The venting opening is surrounded by a pipe, and the separation chamber is connected with the pump chamber by a channel (5).

Description

Die Erfindung betrifft eine Kreiselpumpe mit einer von der zu fördernden Flüssigkeit durchströmten, in Strömungsrichtung vor der Pumpenkammer angeordneten Separationskammer.The invention relates to a centrifugal pump with a through-flow of the liquid to be conveyed, arranged in the flow direction in front of the pump chamber separation chamber.

Es sind die unterschiedlichsten Luftabscheidevorrichtungen insbesondere für Heizungsanlagen bekannt, wobei es auch üblich ist, diese Vorrichtungen direkt an einer Kreiselpumpe anzuordnen, wie dies die EP 905 380 und die DE 37 03 434 zeigen. Diese bekannten Entlüftungsvorrichtungen besitzen verhältnismäßig große Außenabmessungen und geringe Entlüftungsleistungen.There are a variety of Luftabscheidevorrichtungen especially for heating systems known, and it is also common to arrange these devices directly to a centrifugal pump, as the EP 905 380 and the DE 37 03 434 demonstrate. These known venting devices have relatively large external dimensions and low venting performance.

Aufgabe der Erfindung ist es, die eine Kreiselpumpe vorgeschaltete Separationskammer in einer Weise zu verbessern, dass bei geringen Außenabmessungen eine hohe Entlüftungsleistung erreichbar ist.The object of the invention is to improve the separation chamber upstream of a centrifugal pump in such a way that with small external dimensions a high venting performance can be achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst,

  • dass die Separationskammer im wesentlichen zylindrisch mit senkrechter Achse ausgebildet ist,
  • dass zum Bilden eines Flüssigkeitszyklons in der Separationskammer der Flüssigkeitseinlass mindestens eine die Flüssigkeit führende Leitfläche und/oder eine tangentiale Ausrichtung aufweist, und
  • dass die Separationskammer eine obere mittige Entlüftungsöffnung aufweist.
This object is achieved according to the invention
  • that the separation chamber is substantially cylindrical with a vertical axis,
  • in that, in order to form a liquid cyclone in the separation chamber, the liquid inlet has at least one guide surface guiding the liquid and / or a tangential orientation, and
  • the separation chamber has an upper central vent opening.

Hierdurch kann bei hoher Entlüftungsleistung ein geringes Bauvolumen der Separationskammer erreicht werden, so dass die Gesamtaußenabmessungen der Entlüftungsvorrichtung und der Pumpe gering sind.As a result, a low volume of the separation chamber can be achieved with high venting performance, so that the overall external dimensions of the venting device and the pump are low.

Eine besonders frühe und sichere Trennung der Gasblasen aus der Flüssigkeit wird dadurch erreicht, dass die obere Entlüftungsöffnung der Separationskammer von einem Rohr umgeben ist, das nach unten in die Separationskammer hineinragt. Hierbei kann die Rohrlänge ¼ bis ½ der Höhe der Separationskammer betragen.A particularly early and safe separation of the gas bubbles from the liquid is achieved in that the upper vent of the separation chamber is surrounded by a tube which projects down into the separation chamber. Here, the pipe length can be ¼ to ½ of the height of the separation chamber.

Vorzugsweise wird vorgeschlagen, dass die Separationskammer mit dem Pumpenraum über einen Kanal verbunden ist, der seitlich der Separationskammer insbesondere in Höhe des Rohres abgeht und an der Saugöffnung des Pumpenlaufrades mündet.Preferably, it is proposed that the separation chamber is connected to the pump chamber via a channel which branches off laterally from the separation chamber, in particular at the level of the tube, and opens at the suction opening of the pump impeller.

Besonders vorteilhaft ist es, wenn der Flüssigkeitseinlass der Separationskammer an ihrer Unterseite angeordnet ist und stillstehende Leitschaufeln insbesondere einen Leitschaufelkranz aufweist. Hierdurch wird ein besonders stabiler Zyklon in der Separationskammer erzeugt und darüber hinaus die Außenabmessungen verringert, da ein seitlicher Zulauf nicht erforderlich ist. Vielmehr hat es sich als besonders günstig herausgestellt, dass der Einlass der Separationskammer an ihrer Unterseite angeordnet ist und hierbei den Saugstutzen der Pumpe bildet.It is particularly advantageous if the liquid inlet of the separation chamber is arranged on its underside and stationary guide vanes in particular have a guide vane ring. As a result, a particularly stable cyclone is produced in the separation chamber and, moreover, the outer dimensions are reduced since a lateral inflow is not required. Rather, it has been found to be particularly favorable that the inlet of the separation chamber is arranged on its underside and in this case forms the suction nozzle of the pump.

Vorzugsweise wird vorgeschlagen, dass die obere Entlüftungsöffnung der Separationskammer zu einer oberhalb der Separationskammer angeordneten Entlüftungskammer führt, wobei eine automatische Entlüftung erfolgt. Hierbei kann die obere Entlüftungskammer einen Schwimmer aufweisen, der nach oben hin demontierbar ist.It is preferably proposed that the upper vent opening of the separation chamber leads to a vent chamber arranged above the separation chamber, wherein an automatic venting takes place. In this case, the upper venting chamber may have a float which can be dismantled upwards.

Besonders vorteilhaft ist es, wenn das Gehäuse der Enflüftungsvorrichtung insbesondere der Separationskammer mit dem Gehäuse der Pumpe einstückig verbunden ist, so dass die Pumpe und die Entlüftungsvorrichtung eine Einheit bilden.It is particularly advantageous if the housing of the degassing device, in particular of the separation chamber, is integrally connected to the housing of the pump so that the pump and the venting device form a unit.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im Folgenden näher beschrieben. Es zeigen

Fig. 1
einen senkrechten Schnitt durch die Pumpe mit Entlüftungsvorrichtung und
Fig. 2
eine perspektivische Ansicht.
An embodiment of the invention is illustrated in the drawings and will be described in more detail below. Show it
Fig. 1
a vertical section through the pump with venting device and
Fig. 2
a perspective view.

Eine Kreiselpumpe 1, die insbesondere zum Umwälzen des Heizungswassers bei Heizungsanlagen verwendet wird, weist innerhalb eines Pumpengehäuses 2 einen Spiralraum 3 auf, in dem ein Pumpenlaufrad 1a gelagert ist. Das Pumpenlaufrad ist über einen nicht dargestellten Elektromotor antreibbar, der mit seinem Motorengehäuse an einer Anschlussfläche 4 des Gehäuses 2 befestigbar ist.A centrifugal pump 1, which is used in particular for circulating the heating water in heating systems, has within a pump housing 2 a spiral space 3, in which a pump impeller 1a is mounted. The pump impeller can be driven by an electric motor, not shown, which can be fastened with its motor housing to a connection surface 4 of the housing 2.

Ein zum Pumpenlaufrad koaxialer Kanal 5 mündet an der Saugöffnung des Pumpenlaufrades 1 a, so dass die Pumpe 1 aus dem Kanal 5 zum Druckstutzen 6 fördert, der mit dem Spiralraum 3 verbunden ist. Hierbei ist der Druckstutzen 6 an der Oberseite der Pumpe mit vorzugsweise senkrechter Achse angeordnet und weist ein Außengewinde 7 auf.A coaxial to the pump impeller 5 opens at the suction port of the pump impeller 1 a, so that the pump 1 promotes from the channel 5 to the discharge nozzle 6, which is connected to the spiral space 3. Here, the discharge nozzle 6 is arranged on the upper side of the pump with a preferably vertical axis and has an external thread 7.

Am Pumpengehäuse 2 ist seitlich eine Entlüftungsvorrichtung 8 mit ihrem Gehäuse 9 angeformt, so dass die beiden Gehäuse 2, 9 einstückig sind. Das Gehäuse 9 bildet eine untere Separationskammer 10, in der die eingehende Flüssigkeit insbesondere Wasser einen Zyklon ausbildet, so dass der Raum 10 auch eine "Zyklonkammer" genannt werden kann. Die Separationskammer 10 weist einen unteren Flüssigkeitseinlass 11 auf, dessen Querschnitt kreisförmig ist und dem Querschnitt der Separationskammer 10 entspricht. Hierbei geht der Einlass 11 nach unten in den Saugstutzen 12 über, der gleichzeitig den Saugstutzen der Pumpe bildet.On the pump housing 2, a ventilation device 8 is laterally formed with its housing 9, so that the two housings 2, 9 are in one piece. The housing 9 forms a lower separation chamber 10, in which the incoming liquid in particular water forms a cyclone, so that the space 10 can also be called a "cyclone chamber". The separation chamber 10 has a lower liquid inlet 11, whose cross section is circular and corresponds to the cross section of the separation chamber 10. In this case, the inlet 11 goes down into the suction nozzle 12, which simultaneously forms the suction nozzle of the pump.

In der zylindrischen Separationskammer 10, dessen Achse senkrecht steht, ist nahe dem unteren Flüssigkeitseinlass 11 und damit nahe dem Saugstutzen 12 ein Leitschaufelkranz 13 koaxial befestigt, wobei die Leitschaufeln 14 ringförmig einen mittigen, strömungsgünstig geformten Körper umgeben. Durch den Leitschaufelkranz 13 wird die angesaugte Flüssigkeit zu einem Zyklon bewegt, der innerhalb der Separationskammer 10 rotiert. Hierbei ist es nicht erforderlich, dass die Leitschaufeln 14 sich bewegen bzw. rotieren, sondern allein durch das Ansaugen der Flüssigkeit entsteht der Zyklon.In the cylindrical separation chamber 10, whose axis is perpendicular, is near the lower liquid inlet 11 and thus close to the suction nozzle 12th a Leitschaufelkranz 13 coaxially attached, wherein the guide vanes 14 annularly surround a central, aerodynamically shaped body. Through the vane ring 13, the sucked liquid is moved to a cyclone which rotates within the separation chamber 10. In this case, it is not necessary for the guide vanes 14 to move or rotate, but the cyclone is formed solely by the suction of the liquid.

Durch den Zyklon gelangen in der Flüssigkeit befindliche Gasblasen (insbesondere Luftblasen) in den mittleren Bereich des Zyklons und damit zu einer oberen Entlüftungsöffnung 16, die in der oberen Abschlusswand der Separationskammer 10 angeordnet ist.Through the cyclone gas bubbles located in the liquid (in particular air bubbles) in the central region of the cyclone and thus to an upper vent 16, which is arranged in the upper end wall of the separation chamber 10.

Vorzugsweise ist die Öffnung 16 von einem mittleren koaxialen Rohr 17 umgeben, das nach unten offen ist und damit nach unten in den Raum 10 hineinragt, um die sich in der Mitte des Zyklons ansammelnden Gasblasen sicher aufzunehmen und nach oben in eine Entlüftungskammer 18 zu führen. Hierbei beträgt die Länge des Rohres (17) ¼ bis ½ Höhe der Separationskammer, vorzugsweise mindestens die Höhe des Eingangs 20 des Kanals 5. In der oberhalb der Separationskammer 10 koaxial angeordneten Entlüftungskammer 18 ist ein Schwimmer 19 zur selbsttätigen Entlüftung gelagert. Hierbei sind die Teile 11 bis 19 zueinander koaxial angeordnet.Preferably, the opening 16 is surrounded by a central coaxial tube 17, which is open at the bottom and thus projects down into the space 10 to safely receive the accumulating in the middle of the cyclone gas bubbles and to lead upward into a vent chamber 18. Here, the length of the tube (17) is ¼ to ½ height of the separation chamber, preferably at least the height of the inlet 20 of the channel 5. In the above the separation chamber 10 coaxially arranged vent chamber 18, a float 19 is mounted for automatic venting. Here, the parts 11 to 19 are arranged coaxially to each other.

Die von den Luftblasen befreite Flüssigkeit gelangt über eine obere, an der Separationskammer 10 angeordnete Auslassöffnung 20 in einen waagerechten Kanal 5, der die Separationskammer 10 mit dem Spiralraum 3 verbindet, wobei der Kanal 5 an der Saugöffnung des Pumpenlaufrades mündet. Die Achse des Druckstutzens 6 ist parallel zur Achse des Saugstutzens 12 und der Separationskammer 10 angeordnet, so dass eine einfache Befestigung in Rohrleitungen ermöglicht wird.The freed from the air bubbles liquid passes through an upper, arranged on the separation chamber 10 outlet opening 20 in a horizontal channel 5, which connects the separation chamber 10 with the spiral space 3, wherein the channel 5 opens at the suction opening of the pump impeller. The axis of the pressure port 6 is arranged parallel to the axis of the suction nozzle 12 and the separation chamber 10, so that a simple attachment in pipes is made possible.

Claims (9)

Kreiselpumpe (1) mit einer von der zu fördernden Flüssigkeit durchströmten, in Strömungsrichtung vor der Pumpenkammer (3) angeordneten Separationskammer (10), dadurch gekennzeichnet, - dass die Separationskammer (10) im wesentlichen zylindrisch mit senkrechter Achse ausgebildet ist, - dass zum Bilden eines Flüssigkeitszyklons in der Separationskammer (10) der Flüssigkeitseinlass mindestens eine die Flüssigkeit führende Leitfläche (14) und/oder eine tangentiale Ausrichtung aufweist, und - dass die Separationskammer (10) eine obere mittige Entlüftungsöffnung (16) aufweist. Centrifugal pump (1) with a through-flow of the liquid to be conveyed, in the flow direction in front of the pump chamber (3) arranged separation chamber (10), characterized - That the separation chamber (10) is formed substantially cylindrical with a vertical axis, in that, to form a liquid cyclone in the separation chamber (10), the liquid inlet has at least one guide surface (14) guiding the liquid and / or a tangential orientation, and - That the separation chamber (10) has an upper central vent opening (16). Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die obere Entlüftungsöffnung (16) der Separationskammer (10) von einem Rohr (17) umgeben ist, das nach unten in die Separationskammer (10) hineinragt,Pump according to claim 1, characterized in that the upper vent opening (16) of the separation chamber (10) is surrounded by a tube (17) which projects down into the separation chamber (10), Pumpe nach Anspruch 2, dadurch gekennzeichnet, dass die Länge des Rohres (17) ¼ bis ½ der Höhe der Separationskammer (10), vorzugsweise mindestens die Höhe des Eingangs (20) des Kanals (5) beträgt.Pump according to claim 2, characterized in that the length of the tube (17) ¼ to ½ of the height of the separation chamber (10), preferably at least the height of the input (20) of the channel (5). Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Separationskammer (10) mit dem Pumpenraum (3) über einen Kanal (5) verbunden ist, der seitlich der Separationskammer insbesondere in Höhe des Rohres (17) abgeht und an der Saugöffnung des Pumpenlaufrades mündet.Pump according to one of the preceding claims, characterized in that the separation chamber (10) with the pump chamber (3) via a channel (5) is connected, the side of the separation chamber in particular at the level of the tube (17) goes off and at the suction opening of the pump impeller empties. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Flüssigkeitseinlass (11) der Separationskammer (10) an ihrer Unterseite angeordnet ist und mindestens eine stillstehende Leitschaufel (14) insbesondere einen Leitschaufelkranz (13) aufweist.Pump according to one of the preceding claims, characterized in that the liquid inlet (11) of the separation chamber (10) is arranged on its underside and at least a stationary vane (14) in particular a vane ring (13). Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Einlass (11) der Separationskammer (10) den Saugstutzen (12) der Pumpe (1) bildet oder dem Saugstutzen (12) der Pumpe (1) nahe ist.Pump according to one of the preceding claims, characterized in that the inlet (11) of the separation chamber (10) forms the suction port (12) of the pump (1) or the suction port (12) of the pump (1) is close. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die obere Entlüftungsöffnung (16) der Separationskammer (10) zu einer oberhalb der Separationskammer angeordneten Entlüftungskammer (18) führt.Pump according to one of the preceding claims, characterized in that the upper vent opening (16) of the separation chamber (10) leads to a above the separation chamber arranged venting chamber (18). Pumpe nach Anspruch 7, dadurch gekennzeichnet, dass die obere Entlüftungskammer (18) einen Schwimmer (19) aufweist, der nach oben hin demontierbar ist.Pump according to claim 7, characterized in that the upper venting chamber (18) has a float (19) which can be dismantled upwards. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (9) der Entlüftungsvorrichtung insbesondere der Separationskammer (10) mit dem Gehäuse (2) der Pumpe (1) einstückig verbunden ist.Pump according to one of the preceding claims, characterized in that the housing (9) of the ventilation device, in particular the separation chamber (10) with the housing (2) of the pump (1) is integrally connected.
EP08021509.8A 2007-12-18 2008-12-11 Rotary pump with venting arrangement Active EP2072823B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710061558 DE102007061558A1 (en) 2007-12-18 2007-12-18 Centrifugal pump with ventilation

Publications (3)

Publication Number Publication Date
EP2072823A2 true EP2072823A2 (en) 2009-06-24
EP2072823A3 EP2072823A3 (en) 2014-06-25
EP2072823B1 EP2072823B1 (en) 2018-08-08

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ID=40210450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08021509.8A Active EP2072823B1 (en) 2007-12-18 2008-12-11 Rotary pump with venting arrangement

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EP (1) EP2072823B1 (en)
DE (1) DE102007061558A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016138599A1 (en) * 2015-03-03 2016-09-09 Imi Hydronic Engineering Switzerland Ag Device for degassing a liquid
CN114893393A (en) * 2022-04-21 2022-08-12 北京太阳宫燃气热电有限公司 Exhaust device of water feeding pump of gas boiler

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703434A1 (en) 1987-02-05 1988-08-18 Oplaender Wilo Werk Gmbh Centrifugal pump with vent chamber - has passage with side outlet enclosing outlet to rotor
EP0905380A2 (en) 1997-09-30 1999-03-31 WILO GmbH Device for purging air

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6404199A (en) * 1964-04-17 1965-10-18
DE1653725A1 (en) * 1967-09-29 1972-01-13 Hanning Elektro Werke Circulation pump for heating systems
EP0027179B1 (en) * 1979-09-13 1984-07-18 Joh. Vaillant GmbH u. Co. Pump with degasser
SE420230C (en) * 1980-10-20 1987-11-16 Sala International Ab DEVICE FOR PUMPING FOR FOAMING LIQUIDS
DE8102304U1 (en) * 1981-01-30 1981-07-02 Grundfos A/S, 8850 Bjerringbro PUMP WITH NAMEPLATE
DE3109918C2 (en) * 1981-03-14 1989-03-16 Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund Liquid pump with gas separation chamber
AT389236B (en) * 1987-11-03 1989-11-10 Trawoeger Werner SEPARATOR

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703434A1 (en) 1987-02-05 1988-08-18 Oplaender Wilo Werk Gmbh Centrifugal pump with vent chamber - has passage with side outlet enclosing outlet to rotor
EP0905380A2 (en) 1997-09-30 1999-03-31 WILO GmbH Device for purging air

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016138599A1 (en) * 2015-03-03 2016-09-09 Imi Hydronic Engineering Switzerland Ag Device for degassing a liquid
CN114893393A (en) * 2022-04-21 2022-08-12 北京太阳宫燃气热电有限公司 Exhaust device of water feeding pump of gas boiler
CN114893393B (en) * 2022-04-21 2024-05-17 北京太阳宫燃气热电有限公司 Exhaust device of water supply pump of gas boiler

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Publication number Publication date
EP2072823A3 (en) 2014-06-25
EP2072823B1 (en) 2018-08-08
DE102007061558A1 (en) 2009-06-25

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