EP1429034A2 - Thermally insulated motor pump unit - Google Patents

Thermally insulated motor pump unit Download PDF

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Publication number
EP1429034A2
EP1429034A2 EP03024724A EP03024724A EP1429034A2 EP 1429034 A2 EP1429034 A2 EP 1429034A2 EP 03024724 A EP03024724 A EP 03024724A EP 03024724 A EP03024724 A EP 03024724A EP 1429034 A2 EP1429034 A2 EP 1429034A2
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EP
European Patent Office
Prior art keywords
box
motor
pump unit
unit according
heat
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.)
Granted
Application number
EP03024724A
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German (de)
French (fr)
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EP1429034B1 (en
EP1429034A3 (en
Inventor
Stephan Hoheisel
Axel Stange
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.)
Wilo SE
Original Assignee
Wilo AG
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Filing date
Publication date
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Publication of EP1429034A2 publication Critical patent/EP1429034A2/en
Publication of EP1429034A3 publication Critical patent/EP1429034A3/en
Application granted granted Critical
Publication of EP1429034B1 publication Critical patent/EP1429034B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a motor-pump unit with a pump housing outside surrounding particular two-piece insulation shell.
  • the object of the invention is to provide a motor-pump unit of the above type mentioned so that the electrical and / or electronic parts easy to mount and easy to mount box on the engine is interchangeable. It is also an object of the invention to provide such a box of The high temperatures of the motor-pump unit separated and shielded to arrange on the unit.
  • Such a box containing electrical and / or electronic parts can extremely easy and easy to be attached to the thermal insulation. Here he is protected by the temperatures of the aggregate, so that no harmful larger temperature fluctuations in the box can occur.
  • the insulation shell (s) is not one at a distance to the aggregate arranged housing, but the heat insulation shell (s) encloses / surrounds the motor-pump unit closely.
  • the box is releasably secured. Also is advantageous if the box is positively or non-positively attached.
  • a particularly advantageous embodiment is given when the outside the shell wall of the insulation has at least one projection, the rests positively in at least one recess of the box.
  • the box may have at least one in particular dovetail-shaped Projection in the / the correspondingly shaped recess (s) of Insert heat insulation shell.
  • a very advantageous alternative embodiment is that in the outside the shell wall of the thermal insulation opens outward Recess is in which the box completely or partially positive rests.
  • the box can be screwed on and / or by at least one Velcro fastened. It is preferably proposed that the box a switching power supply and / or a frequency converter for the motor has.
  • the unit has a motor 1, on whose housing the housing 2 a Centrifugal pump attached in particular screwed.
  • the housing 2 has a suction nozzle 3 and a discharge nozzle 4, which in this Embodiment opposite coaxial and perpendicular to the Pump axis are arranged.
  • the housing of the pump is of a two-part heat-insulating shell.
  • 5 Engumcreate which consists of two shell halves 5a and 5b.
  • Under Thermal insulation shell (s) is not a housing but a Thermal insulation layer understood, which like a second skin the pump set tightly surrounds and no spaces between the shell and the Leaves aggregate outside free.
  • each shell half 5a, 5b Attached to the outside of each shell half 5a, 5b is a dovetailed projection 6 on which a box 7 in the way can be fastened, that provided on the outside of the box recess 8 of the box on the projection 6 is pushed from the side, as the Recess 8 according to the projection 6 dovetailed is formed, so that a positive connection between the box. 7 and the shell half 5a.
  • a projection 6 can also have a plurality of projections on the shell half 5a provided in corresponding recesses in the Insert box side wall.
  • the Box 7 two projections 9a and 9b, which in corresponding recesses 10a, 10b of the shell half eino positively.
  • both shell halves 5a, 5b at their Outer sides are the same shape and thus also a projection 6 and preferably two recesses 10a, 10b, so that the box. 7 optionally on one or the other side of the insulation and thus the unit or the pump can be attached.
  • the box 7 has electrical and / or electronic parts and forms Low-voltage switching power supply, in particular with a frequency converter. about a connector and / or a connection cable is the box with the Motor electrically connected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

Motor/pump device comprises an especially two-part heat-insulating shell (5) externally surrounding a pump housing (2). A box (7) fixed in and/or on the shell wall of the heat insulation contains the electrical and/or electronic components. Preferred Features: The heat-insulating shell closely surrounds the motor/pump device. The box is removably fixed to the shell wall in a force- or form-locking manner.

Description

Die Erfindung betrifft ein Motor-Pumpen-Aggregat mit einer das Pumpengehäuse außen umgebenden insbesondere zweiteiligen Wärmedämmungsschale.The invention relates to a motor-pump unit with a pump housing outside surrounding particular two-piece insulation shell.

Es ist bekannt, das Pumpengehäuse eines Motor-Pumpen-Aggregats außen mit einer Wärmedämmungsschale eng zu umgeben und ferner an der Außenseite des Motors einen Kasten zu befestigen, der auch "Klemmenkasten" genannt wird und elektrische und/oder elektronische Bauteile enthält. Das Befestigen eines solchen Kastens ist aufwendig und darüber hinaus ist ein Auswechseln umständlich. Ferner ist es aus der DE 101 12 626 bekannt, ein Gehäuse aus Kunststoffschaum um eine Pumpe, eine Trinkwassereinspeisevorrichtung und eine elektrische Steuerung anzuordnen, wobei das Gehäuse innen genügend Raum für Leitungen, Ventile und Luftkanäle belässt. Hierbei sind die Teile der elektrischen Steuerung der Wärme der Pumpe ausgesetzt.It is known, the pump housing of a motor-pump unit outside with to surround a heat insulation shell closely and also on the outside of the Motors to attach a box, which is also called "terminal box" and contains electrical and / or electronic components. The fixing of such Box is complex and beyond a replacement is awkward. Furthermore, it is known from DE 101 12 626, a housing made of plastic foam to a pump, a drinking water supply device and an electric To arrange control, wherein the housing inside enough space for lines, Valves and air ducts leaves. Here are the parts of the electrical control exposed to the heat of the pump.

Aufgabe der Erfindung ist es, ein Motor-Pumpen-Aggregat der eingangs genannten Art so zu verbessern, dass der elektrische und/oder elektronische Teile aufweisende, am Motor angeschlossene Kasten einfach zu befestigen und leicht auswechselbar ist. Auch ist es Aufgabe der Erfindung, einen solchen Kasten von den hohen Temperaturen des Motor-Pumpen-Aggregats getrennt und abgeschirmt am Aggregat anzuordnen.The object of the invention is to provide a motor-pump unit of the above type mentioned so that the electrical and / or electronic parts easy to mount and easy to mount box on the engine is interchangeable. It is also an object of the invention to provide such a box of The high temperatures of the motor-pump unit separated and shielded to arrange on the unit.

Diese Aufgaben werden erfindungsgemäß dadurch gelöst, dass in, an und/oder auf der Schalenwand der Wärmedämmung ein Kasten befestigbar ist, in dem elektrische und/oder elektronische Teile enthalten sind.These objects are achieved according to the invention in that in, on and / or on the shell wall of the insulation a box is fastened, in which electrical and / or electronic parts are included.

Ein solcher elektrische und/oder elektronische Teile aufweisender Kasten kann äußerst einfach und leicht lösbar an der Wärmedämmung befestigt werden. Hierbei ist er von den Temperaturen des Aggregats geschützt, so dass keine schädlichen größeren Temperaturschwankungen im Kasten auftreten können.Such a box containing electrical and / or electronic parts can extremely easy and easy to be attached to the thermal insulation. Here he is protected by the temperatures of the aggregate, so that no harmful larger temperature fluctuations in the box can occur.

Bei der/den Wärmedämmungsschale(n) handelt es sich nicht um ein im Abstand zum Aggregat angeordnetes Gehäuse, sondern die Wärmedämmungsschale(n) umschließt/umschließen das Motor-Pumpen-Aggregat eng.The insulation shell (s) is not one at a distance to the aggregate arranged housing, but the heat insulation shell (s) encloses / surrounds the motor-pump unit closely.

Vorzugsweise wird vorgeschlagen, dass der Kasten lösbar befestigt ist. Auch ist von Vorteil, wenn der Kasten form- oder kraftschlüssig befestigt ist.It is preferably proposed that the box is releasably secured. Also is advantageous if the box is positively or non-positively attached.

Eine besonders vorteilhafte Ausführung ist dann gegeben, wenn die Außenseite der Schalenwand der Wärmedämmung mindestens einen Vorsprung aufweist, der in mindestens einer Ausnehmung des Kastens formschlüssig einliegt. Hierbei kann der Kasten mit mindestens einem insbesondere schwalbenschwanzförmigen Vorsprung in der/den entsprechend geformten Ausnehmung(en) der Wärmedämmungsschale einliegen.A particularly advantageous embodiment is given when the outside the shell wall of the insulation has at least one projection, the rests positively in at least one recess of the box. in this connection the box may have at least one in particular dovetail-shaped Projection in the / the correspondingly shaped recess (s) of Insert heat insulation shell.

Eine sehr vorteilhafte alternative Ausführung besteht darin, dass in der Außenseite der Schalenwand der Wärmedämmung eine sich nach außen öffnende Ausnehmung ist, in der der Kasten vollständig oder teilweise formschlüssig einliegt. A very advantageous alternative embodiment is that in the outside the shell wall of the thermal insulation opens outward Recess is in which the box completely or partially positive rests.

Ferner kann der Kasten angeschraubt und/oder durch mindestens einen Klettverschluss befestigt sein. Vorzugsweise wird vorgeschlagen, dass der Kasten ein Schaltnetzteil und/oder einen Frequenzumformer für den Motor aufweist.Furthermore, the box can be screwed on and / or by at least one Velcro fastened. It is preferably proposed that the box a switching power supply and / or a frequency converter for the motor has.

Besonders vorteilhaft ist es, wenn die Wärmedämmungsschale auf ihren beiden Seiten gleich geformt ist, so dass der Kasten wahlweise auf der einen oder der anderen Seite der Pumpe befestigbar ist.It is particularly advantageous if the heat insulation shell on their two Pages is shaped the same, so that the box either on the one or the the other side of the pump can be fastened.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung in einer Seitenansicht dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is in the drawing in a side view and will be described in more detail below.

Das Aggregat weist einen Motor 1 auf, an dessen Gehäuse das Gehäuse 2 einer Kreiselpumpe befestigt insbesondere angeschraubt ist. Das Gehäuse 2 weist einen Saugstutzen 3 und einen Druckstutzen 4 auf, die in diesem Ausführungsbeispiel einander gegenüberliegend koaxial und rechtwinklig zur Pumpenachse angeordnet sind.The unit has a motor 1, on whose housing the housing 2 a Centrifugal pump attached in particular screwed. The housing 2 has a suction nozzle 3 and a discharge nozzle 4, which in this Embodiment opposite coaxial and perpendicular to the Pump axis are arranged.

Das Gehäuse der Pumpe ist von einer zweiteiligen Wärmedämmungsschale 5 engumgeben, das aus zwei Schalenhälften 5a und 5b besteht. Unter Wärmedämmungsschale(n) wird hier kein Gehäuse sondern eine Wärmedämmschicht verstanden, die wie eine zweite Haut das Pumpenaggregat eng umgibt und keine Zwischenräume zwischen der Schale und der Aggregataußenseite freilässt.The housing of the pump is of a two-part heat-insulating shell. 5 Engumgeben, which consists of two shell halves 5a and 5b. Under Thermal insulation shell (s) is not a housing but a Thermal insulation layer understood, which like a second skin the pump set tightly surrounds and no spaces between the shell and the Leaves aggregate outside free.

An der Außenseite jeder Schalenhälfte 5a, 5b befestigt ist ein schwalbenschwanzförmiger Vorsprung 6, auf dem ein Kasten 7 in der Weise befestigbar ist, dass eine an der Kastenaußenseite vorgesehene Ausnehmung 8 des Kastens über den Vorsprung 6 von der Seite her schiebbar ist, da die Ausnehmung 8 entsprechend dem Vorsprung 6 schwalbenschwanzförmig ausgebildet ist, so dass eine formschlüssige Verbindung zwischen dem Kasten 7 und der Schalenhälfte 5a besteht. Attached to the outside of each shell half 5a, 5b is a dovetailed projection 6 on which a box 7 in the way can be fastened, that provided on the outside of the box recess 8 of the box on the projection 6 is pushed from the side, as the Recess 8 according to the projection 6 dovetailed is formed, so that a positive connection between the box. 7 and the shell half 5a.

Statt einem Vorsprung 6 können auch mehrere Vorsprünge an der Schalenhälfte 5a vorgesehen sein, die in entsprechenden Ausnehmungen in der Kastenseitenwand einliegen. Im Ausführungsbeispiel weist darüber hinaus der Kasten 7 zwei Vorsprünge 9a und 9b auf, die in entsprechenden Ausnehmungen 10a, 10b der Schalenhälfte formschlüssig einliegen.Instead of a projection 6 can also have a plurality of projections on the shell half 5a provided in corresponding recesses in the Insert box side wall. In the exemplary embodiment, moreover, the Box 7 two projections 9a and 9b, which in corresponding recesses 10a, 10b of the shell half einliegen positively.

Besonders vorteilhaft ist es, wenn beide Schalenhälften 5a, 5b an ihren Außenseiten gleich geformt sind und damit auch einen Vorsprung 6 und vorzugsweise zwei Ausnehmungen 10a, 10b aufweisen, so dass der Kasten 7 wahlweise auf der einen oder der anderen Seite der Wärmedämmung und damit des Aggregats bzw. der Pumpe befestigt werden kann.It is particularly advantageous when both shell halves 5a, 5b at their Outer sides are the same shape and thus also a projection 6 and preferably two recesses 10a, 10b, so that the box. 7 optionally on one or the other side of the insulation and thus the unit or the pump can be attached.

Der Kasten 7 weist elektrische und/oder elektronische Teile auf und bildet ein Niederspannungs-Schaltnetzteil insbesondere mit einem Frequenzumformer. Über eine Steckverbindung und/oder über ein Anschlusskabel ist der Kasten mit dem Motor elektrisch verbunden.The box 7 has electrical and / or electronic parts and forms Low-voltage switching power supply, in particular with a frequency converter. about a connector and / or a connection cable is the box with the Motor electrically connected.

Claims (11)

Motor-Pumpen-Aggregat mit einer das Pumpengehäuse außen umgebenden insbesondere zweiteiligen Wärmedämmungsschale (5, 5a, 5b), dadurch gekennzeichnet, dass in, an und/oder auf der Schalenwand der Wärmedämmung ein Kasten (7) befestigbar ist, in dem elektrische und/oder elektronische Teile enthalten sind.Motor-pump unit with a surrounding the pump housing outside in particular two-piece heat-insulating shell (5, 5a, 5b), characterized in that in, on and / or on the shell wall of the heat insulation, a box (7) can be fastened, in the electrical and / or electronic parts are included. Motor-Pumpen-Aggregat nach Anspruch 1, dadurch gekennzeichnet, dass die Wärmedämmungsschale(n) das Motor-Pumpen-Aggregat eng umschließt/umschließen.Motor-pump unit according to claim 1, characterized in that the heat-insulating shell (s) closely surrounds the motor-pump unit / enclose. Motor-Pumpen-Aggregat nach Anspruch 1, dadurch gekennzeichnet, dass der Kasten (7) lösbar befestigt ist.Motor-pump unit according to claim 1, characterized in that the box (7) is releasably secured. Motor-Pumpen-Aggregat nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Kasten (7) form- oder kraftschlüssig befestigt ist.Motor-pump unit according to one of the preceding claims, characterized in that the box (7) is positively or non-positively attached. Motor-Pumpen-Aggregat nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Außenseite der Schalenwand der Wärmedämmung (5) mindestens einen Vorsprung (6) aufweist, der in mindestens einer Ausnehmung (8) des Kastens (7) formschlüssig einliegt.Motor-pump unit according to one of the preceding claims, characterized in that the outer side of the shell wall of the thermal insulation (5) has at least one projection (6) which rests positively in at least one recess (8) of the box (7). Motor-Pumpen-Aggregat nach Anspruch 5, dadurch gekennzeichnet, dass der Kasten (7) mit mindestens einem insbesondere schwalbenschwanzförmigen Vorsprung (9a, 9b) in der/den entsprechend geformten Ausnehmung(en) (10a, 10b) der Wärmedämmungsschale (5) einliegt. Motor-pump unit according to claim 5, characterized in that the box (7) with at least one in particular dovetail-shaped projection (9a, 9b) in the / the correspondingly shaped recess (s) (10a, 10b) of the heat-insulating shell (5) rests , Motor-Pumpen-Aggregat nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass in der Außenseite der Schalenwand der Wärmedämmung (5) eine sich nach außen öffnende Ausnehmung ist, in der der Kasten (7) vollständig oder teilweise formschlüssig einliegt.Motor-pump unit according to one of claims 1 to 4, characterized in that in the outside of the shell wall of the thermal insulation (5) is an outwardly opening recess in which the box (7) rests completely or partially positively. Motor-Pumpen-Aggregat nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Kasten (7) angeschraubt ist.Motor-pump unit according to one of the preceding claims, characterized in that the box (7) is screwed. Motor-Pumpen-Aggregat nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Kasten (7) durch mindestens einen Klettverschluss befestigt ist.Motor-pump unit according to one of the preceding claims, characterized in that the box (7) is fastened by at least one hook and loop fastener. Motor-Pumpen-Aggregat nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Kasten (7) ein Schaltnetzteil und/oder einen Frequenzumformer für den Motor (1) aufweist.Motor-pump unit according to one of the preceding claims, characterized in that the box (7) has a switched-mode power supply and / or a frequency converter for the motor (1). Motor-Pumpen-Aggregat nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Wärmedämmungsschale (5) auf ihren beiden Seiten gleich geformt ist, so dass der Kasten (7) wahlweise auf der einen oder der anderen Seite der Pumpe befestigbar ist.Motor-pump unit according to one of the preceding claims, characterized in that the heat-insulating shell (5) is formed identically on both sides, so that the box (7) is selectively fastened on one or the other side of the pump.
EP03024724.1A 2002-12-10 2003-10-29 Thermally insulated motor pump unit Expired - Lifetime EP1429034B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10257493 2002-12-10
DE2002157493 DE10257493A1 (en) 2002-12-10 2002-12-10 Motor-pump unit with thermal insulation shell

Publications (3)

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EP1429034A2 true EP1429034A2 (en) 2004-06-16
EP1429034A3 EP1429034A3 (en) 2006-01-04
EP1429034B1 EP1429034B1 (en) 2016-08-31

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Cited By (16)

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EP1647718A1 (en) * 2004-10-12 2006-04-19 Wilo Ag External thermal insulation for a pump
WO2010009704A2 (en) * 2008-07-19 2010-01-28 Alldos Eichler Gmbh Actuator unit comprising a separate control unit
US20120308401A1 (en) * 2010-01-19 2012-12-06 Grundfos Management A/S Pump unit
US20150204334A1 (en) * 2004-08-26 2015-07-23 Pentair Water Pool And Spa, Inc. Speed Control
US9932984B2 (en) 2004-08-26 2018-04-03 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US10030647B2 (en) 2010-02-25 2018-07-24 Hayward Industries, Inc. Universal mount for a variable speed pump drive user interface
US10289129B2 (en) 2003-12-08 2019-05-14 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10415569B2 (en) 2004-08-26 2019-09-17 Pentair Water Pool And Spa, Inc. Flow control
US10480516B2 (en) 2004-08-26 2019-11-19 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-deadhead function
US10590926B2 (en) 2009-06-09 2020-03-17 Pentair Flow Technologies, Llc Method of controlling a pump and motor
US10718337B2 (en) 2016-09-22 2020-07-21 Hayward Industries, Inc. Self-priming dedicated water feature pump
US10724263B2 (en) 2008-10-06 2020-07-28 Pentair Water Pool And Spa, Inc. Safety vacuum release system
US10731655B2 (en) 2004-08-26 2020-08-04 Pentair Water Pool And Spa, Inc. Priming protection
US10871001B2 (en) 2004-08-26 2020-12-22 Pentair Water Pool And Spa, Inc. Filter loading
US10947981B2 (en) 2004-08-26 2021-03-16 Pentair Water Pool And Spa, Inc. Variable speed pumping system and method
EP4390140A1 (en) 2022-12-21 2024-06-26 Wilo Se Double pump with insulating liner and related assembly method

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Cited By (34)

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US10289129B2 (en) 2003-12-08 2019-05-14 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10642287B2 (en) 2003-12-08 2020-05-05 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10416690B2 (en) 2003-12-08 2019-09-17 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10409299B2 (en) 2003-12-08 2019-09-10 Pentair Water Pool And Spa, Inc. Pump controller system and method
US11073155B2 (en) 2004-08-26 2021-07-27 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US10415569B2 (en) 2004-08-26 2019-09-17 Pentair Water Pool And Spa, Inc. Flow control
US10871163B2 (en) 2004-08-26 2020-12-22 Pentair Water Pool And Spa, Inc. Pumping system and method having an independent controller
US9932984B2 (en) 2004-08-26 2018-04-03 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US10947981B2 (en) 2004-08-26 2021-03-16 Pentair Water Pool And Spa, Inc. Variable speed pumping system and method
US10731655B2 (en) 2004-08-26 2020-08-04 Pentair Water Pool And Spa, Inc. Priming protection
US10240604B2 (en) * 2004-08-26 2019-03-26 Pentair Water Pool And Spa, Inc. Pumping system with housing and user interface
US10240606B2 (en) 2004-08-26 2019-03-26 Pentair Water Pool And Spa, Inc. Pumping system with two way communication
US20150204334A1 (en) * 2004-08-26 2015-07-23 Pentair Water Pool And Spa, Inc. Speed Control
US10871001B2 (en) 2004-08-26 2020-12-22 Pentair Water Pool And Spa, Inc. Filter loading
US10527042B2 (en) 2004-08-26 2020-01-07 Pentair Water Pool And Spa, Inc. Speed control
US11391281B2 (en) 2004-08-26 2022-07-19 Pentair Water Pool And Spa, Inc. Priming protection
US10502203B2 (en) 2004-08-26 2019-12-10 Pentair Water Pool And Spa, Inc. Speed control
US10480516B2 (en) 2004-08-26 2019-11-19 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-deadhead function
EP1647718A1 (en) * 2004-10-12 2006-04-19 Wilo Ag External thermal insulation for a pump
WO2010009704A3 (en) * 2008-07-19 2010-11-18 Alldos Eichler Gmbh Actuator unit comprising a separate control unit
WO2010009704A2 (en) * 2008-07-19 2010-01-28 Alldos Eichler Gmbh Actuator unit comprising a separate control unit
DE102008033859B4 (en) 2008-07-19 2018-07-26 Grundfos Holding A/S Actuator unit with separate control unit
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