EP3559472B1 - Water pump - Google Patents

Water pump Download PDF

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Publication number
EP3559472B1
EP3559472B1 EP17828693.6A EP17828693A EP3559472B1 EP 3559472 B1 EP3559472 B1 EP 3559472B1 EP 17828693 A EP17828693 A EP 17828693A EP 3559472 B1 EP3559472 B1 EP 3559472B1
Authority
EP
European Patent Office
Prior art keywords
water pump
suction
pump according
housing
pressure
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.)
Active
Application number
EP17828693.6A
Other languages
German (de)
French (fr)
Other versions
EP3559472A1 (en
Inventor
Franziska Agrawal
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.)
Einhell Germany AG
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Einhell Germany AG
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Filing date
Publication date
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Publication of EP3559472A1 publication Critical patent/EP3559472A1/en
Application granted granted Critical
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0227Lack of liquid level being detected using a flow transducer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077Safety measures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • the invention relates to a water pump, in particular a garden pump or a pump for a domestic water pump.
  • Water pumps are known from the general state of the art, which are designed to convey a liquid as centrifugal pumps or jet pumps. These are often equipped with a self-priming system, but with larger suction depths, a relatively long suction time is achieved.
  • Such water pumps are provided as portable or permanently installed pumps with an electronic control unit, typically used as garden pumps or as part of a domestic water pump in domestic waterworks.
  • a garden pump which is equipped with a controller so that when the pump is started up in the suction phase, after a running time of 60 seconds, a short pause of 4 seconds is programmed. This cycle can be repeated several times until the pump moves the water.
  • a garden pump arrangement is known with a pump driven by an electric drive motor and with a control device which contains a flow sensor and when the flow falls below the specified value a minimum flow rate through the pump outlet switches off the drive motor, a delay time being specified between falling below the minimum flow rate and the motor switching off. Since the delay time is at least 1.5 minutes and a user-actuable control element is available to switch on the drive motor after it has been switched off beforehand, regardless of the output pressure of the pump, no pressure sensor with a switch-on threshold is provided.
  • a liquid pump with a filter, a suction connection and a pressure connection is known, the suction connection and the pressure connection being arranged above and below a plane running through the center of gravity of the liquid pump and a window arranged on the filter housing enabling the degree of contamination of the filter to be assessed.
  • a water pump in particular a garden pump or a pump of a domestic water pump, which has a pump unit in a housing that can be driven by an electric motor and that can pump water as the delivery liquid from a suction line to a pressure line, the housing having a pump connected to the suction line Pump housing and a housing extension with the pressure line that is connected to the pump housing, the housing extension having a filter unit as a closure and an at least partially transparent window being arranged between the suction line and the pressure line, so that before the pump is operated, there is a liquid level inside of the housing on the pump housing can be read from the outside, and the filter unit has a suction indicator so that the presence of suction pressure in the pump housing can be identified via the suction indicator or a leak in the suction line.
  • a water pump is specified in which the filling of the suction line is indicated before start-up by an at least partially transparent window being arranged on the housing.
  • a user can therefore see that the suction line has been filled with the pumped liquid up to the prescribed liquid level.
  • the pump housings of prior art pumps are typically made of opaque materials, the user is not given any information as to whether or not water would be in the pump.
  • pumps can also be designed without a return valve in some applications and, moreover, are typically present with a completely emptied suction line when first installed, it is therefore for required for the safe operation of the water pump to carry out the installation steps according to the instructions in the user manual.
  • the invention now provides a remedy in that the liquid level inside the housing can be read from the outside via the partially transparent window, so that the user is informed whether installation measures may still have to be taken here.
  • This procedure significantly reduces the risk of the pump being operated contrary to the instructions in the operating manual. This is particularly important when the water pump has to suck in water from a lower level, typically two meters or more, since the suction pressure built up by the water pump is not sufficient here to fill the suction line. In addition to filling the suction line, the presence of suction pressure is also important for correct functioning.
  • the invention provides a suction indicator in the area of the filter unit.
  • a suction indicator in the area of the filter unit.
  • the pump when raising water from a low level, for example up to 8m, it may be necessary for the pump to run dry for an extended period of time in order to draw water from this area.
  • a user does not receive any information as to whether the suction process is taking place correctly. If, for example, there was a leak on the suction side, the pump would also run dry for a long time without sucking in water, so that it could only be switched off for a specific time window.
  • the suction display reliably signals from the outside that the suction process will be completed successfully without having to wait and see the result of the suction.
  • the water reservoir would have been correctly installed, since otherwise no intake pressure could be displayed.
  • an incomplete seal at the connection to the suction line could be a possible source of error.
  • the operational reliability of the water pump is therefore significantly improved by displaying the suction pressure on the filter cover via the suction display.
  • the suction indicator exerts pressure on a display element while liquid is being sucked in, so that the suction pressure can be seen on a filter cover.
  • the pressure can be exerted on the suction indicator via a membrane, which is held by a receptacle arranged on the side facing away from the filter cover.
  • a force can be applied to the membrane relative to the receptacle by means of a spring-elastic element, in particular a spiral spring or a spiral spring whose pretension can be adjusted.
  • a further suction indicator preferably arranged coaxially to the suction indicator.
  • variable as well as variable or multiple ranges of intake pressure can be displayed.
  • a corresponding presetting can be made at the factory by selecting the appropriate suction indicator.
  • the at least partially transparent window is arranged on the preferably cylindrical housing extension, whereby this can be done by providing the housing extension with a transparent window that is also slit-shaped, so that the The water level between the suction line and the pressure line can be read from the outside.
  • the at least partially transparent window is a component of the filter unit, which preferably functions as a filling opening.
  • the filter unit can typically also be used as a filling opening and thus forms the end of the housing extension
  • the transparent design of the housing means that both the correct filling of the suction line and any additional accumulation of material in the filter can be read from the outside at this point.
  • the filter unit has side walls which can be produced at least in sections, preferably completely, from an optically at least partially transparent material.
  • the aforementioned measures enable a high level of user comfort, in particular during maintenance or the commissioning of the water pump.
  • a liquid sensor both alternatively and additionally, instead of reading through the transparent window on the part of the user, which detects the liquid level in the area of the pump housing and signals it at the transparent window. Accordingly, the correct filling of the suction line is automatically displayed, with the transparent window in this case being the cover of a light-emitting diode, for example.
  • a coupling of the liquid sensor to a control unit, for example, a start-up could prevent non-filling is also provided within the scope of the invention.
  • a pressure sensor is arranged on the pressure line, which is connected to a control unit.
  • the combination of pressure sensor and control unit makes it possible in particular to detect pressure loss on the consumer side, so that in combination with a pressure reservoir, for example a water tank or the like, a domestic water automat can be created which only reacts to pressure loss on the consumer side with a delay. Furthermore, the pressure sensor can activate status displays via the control unit, which can display corresponding operating states of the water pump, for example in the form of LEDs.
  • a non-return valve is provided, which is part of the filter unit serving as a filling opening.
  • the liquid to be pumped is introduced via the filling opening on the water pump side.
  • the return valve is intended to prevent precisely this, so that it must be deactivated during commissioning if the pumped liquid is to be filled in above the return valve.
  • the return valve is part of the filling opening, the return valve is forcibly taken out of service by removing the filling opening.
  • a return valve which has an automatic vent.
  • the invention provides an automatic ventilation system here, which can, for example, divert the escaping air without the user having to do anything.
  • the return valve can have at least one passage which, when the return valve is closed, serves as a vent when the suction line is filled with pumped liquid, the at least one passage being closable via a sealing ring when the pump unit is activated.
  • the passage channel can be arranged on a valve plate of the return valve.
  • the sealing ring can be arranged with an overlying adjusting disk on the side of the pressure line so as to be displaceable under spring preload along a valve stem of the return valve.
  • the non-return valve can be integrated into the water pump, whereby the venting of the water pump when filling with water on the suction line side requires no manual intervention by providing passage channels on the valve disk, which are secured with a sealing washer and a support washer.
  • the pump When filling water into the suction line, the pump is depressurized so that the sealing ring leaves the passage channel open so that air can escape through the passage channels.
  • the size of the passage channels is selected in such a way that the water can flow into the suction line while the air can escape at the same time.
  • pressure builds up in the pressure chamber and the sealing disk closes.
  • the state of dry running is reliably detected, particularly in the case of a longer suction time due to water bubbles or increased water temperature, so that the control device can monitor safe pump operation with a corresponding time specification for the maximum dry running time present.
  • the switch is preferably activated magnetically, so that, for example, a REED switch or a Hall sensor can be used, which is actuated by means of a magnet arranged on the return valve.
  • the switch can also trigger a scalding protection, which is activated, for example, if the water pump is operated against a closed pressure line, the water inside the water pump then being heated by the pump unit.
  • a water pump according to the invention is shown in a perspective side view obliquely from above, with those components which are essential for explaining the invention. However, the other components necessary for the implementation of the invention are known to a person skilled in the art.
  • the water pump WP includes in the representation according to 1 a housing GE, which is formed from a pump housing PG and an adjoining cylindrical housing extension GF. There is a drain AB on the underside of the pump housing PG. A connection for a suction line SL is attached to the upper end of the cylindrically designed housing extension GF.
  • the pump unit driven by an electric motor (not in 1 shown) arranged.
  • the housing extension GF is completed by a filter unit FT, which has a filter cover FD on its upper side. Furthermore, the housing extension GF is connected to a connection for a pressure line DL, which can pass on the water sucked in via the suction line SL according to the application of the water pump. A transparent window (not in 1 shown) may be provided, which is particularly advantageous when the filter housing is made of non-transparent material.
  • the housing extension GF and the pump housing PG are typically also made of opaque plastic material or metallic materials.
  • a transparent window FE is provided according to the invention, which makes it possible to read the liquid level FL from the outside if the filling is correct.
  • the liquid level FL is signaled via a transparent window FE attached to the pump housing PG.
  • the correct filling with pumped liquid can not only be done with one Liquid level FL are displayed within the transparent window FE but generally also by completely covering the transparent window FE with pumped liquid, so that only the presence but not the exact level of the pumped liquid is displayed.
  • both are understood by the term liquid level FL.
  • a screw cap SD made of transparent material or with a transparent insert can also be provided.
  • the water pump WP draws in the pumped liquid from the suction line SL.
  • a suction indicator SA arranged in the filter cover FD, which is designed in the form of a pen, the suction indicator SA protruding from the filter cover FD before operation and being pushed into the filter cover FD during operation of the water pump WP.
  • a non-return valve may be fitted.
  • the outlet AB is provided so that the pumped liquid in the pressure line DL can drain off by making an opening.
  • FIG 2 Another embodiment of the water pump WP is with reference to FIG 2 shown.
  • the water pump WP in a perspective Side view shown toward a front.
  • the housing extension GF is provided with an elongated transparent window FE, via which the correct filling of the suction line SL at the water pump WP can be read using the liquid level FL.
  • FIG. 3 shows the pump in a perspective side view, in which case, in contrast to the previous embodiment, the housing of the filter unit FT consists of a transparent plastic material, so that the liquid level FL can be read within the side walls of the filter unit FT.
  • the filter unit FT has side walls which, at least in sections, but preferably completely, are made of an optically transparent material.
  • the filter unit FT has a filter cover FD which, according to further embodiments of the invention, can be equipped with a suction indicator SA.
  • the suction indicator SA is described in more detail below with reference to FIG Figures 4 to 8 described in several embodiments.
  • the filter cover FD is shown schematically in a perspective cross-sectional view. It can be seen that a membrane MB, which can exert a certain axial spring force, opens out into a seal DI so that a watertight seal is formed between a receptacle AU and the filter cover FD completion is possible.
  • the membrane MB is provided with the suction indicator SA, which can be routed to the outside through an opening in the filter cover FD, with the membrane MB corresponding to the suction indicator SA inward via a channel KA when there is pressure inside the filter unit FT pulls or pushes outwards without the presence of pressure. This makes it possible to detect the presence of a suction pressure inside the water pump via the suction indicator SA, which is designed as a pin-shaped display element, and to display this to a user.
  • FIG. 5 Another embodiment is in figure 5 shown in a cross-sectional view.
  • the seal DI is located within the channel KA on a cylindrical rod of the suction indicator SA.
  • the membrane MB is arranged together with the suction indicator SA between the mount AU and the filter cover FD.
  • the membrane MB is equipped with a corresponding axial spring force, with the presence of suction pressure also being able to ensure an axial displacement of the suction indicator SA through the filter cover FD, as described above.
  • FIG. 6 Another embodiment of a suction indicator SA is in 6 shown in a cross-sectional view.
  • the suction indicator SA is in turn connected to a membrane MB arranged on a receptacle AU, which is arranged underneath the filter cover FD, so that the suction indicator SA can penetrate the filter cover FD by axial displacement.
  • the suction indicator SA has according to FIG figure 5 transverse to the axial direction of larger external dimensions, so that the suction indicator SA is not only in the form of a pin-shaped display element but in the form of an enlarged touch surface on the filter cover FD.
  • a spiral spring SF is provided, which is connected via a spring plate FE to the suction indicator SA or the membrane MB.
  • the spring plate FE prevents the spiral spring SF from coming into contact with the membrane MB, which could possibly lead to damage or at least make assembly more difficult.
  • the channel KA is in turn arranged inside the spiral spring SF, so that with a corresponding suction pressure, an axial displacement of the suction indicator SA is possible.
  • the membrane MB is in accordance with the embodiment 6 now preloaded with the spiral spring SF, so that correspondingly higher suction pressure values can also be displayed.
  • the suction indicator SA can also be used to build up a pumping effect through rhythmic actuation and thereby manually generate suction pressure. This could be advantageous, for example, when the water pump WP is started up. The prerequisite for this is to install a non-return valve at the end of the suction line.
  • the spiral spring SF has a fixing means FM on the side opposite the membrane MB, so that the preload of the spiral spring SF can be adjusted via a spring plate FE' by axially adjusting the adjusting means FM.
  • the locking device FM In order not to impair the function, the locking device FM must also be connected to the channel KA in the axial direction. It is thus possible to carry out an adaptation of the suction indicator SA by adjusting the adjusting means FM when the water pump WP is installed at different heights in relation to the water level of the water to be pumped out.
  • the spring plate FE and the spring plate FE' only serve to mechanically protect adjacent components, in particular the membrane MB, although in other embodiments the suction indicator SA could also be provided without the spring plate FE.
  • the fixing means FM could also have corresponding area markings together with the mount AU, or it could be adjustable in discrete steps correspondingly marked on the mount AU, so that a user can set the functional area of the suction indicator SA to the appropriate installation height of the water pump WP in a controlled manner.
  • a third embodiment of a spring-loaded suction indicator SA is now shown.
  • the related 6 Suction indicator SA described is modified in such a way that it is designed as a hollow cylinder in the axial direction, so that another suction indicator SA' can be inserted coaxially into the interior of the suction indicator SA.
  • the further suction indicator SA' is in turn connected to a further membrane MB', which comes to lie below the receptacle AU in a further receptacle AU'.
  • the additional membrane MB' is also prestressed via a spiral spring SF', which is connected to the additional membrane MB' via a spring plate FE'.
  • Such an embodiment can be used, for example, to display two different pressure ranges, depending on the desired installation height of the water pump WP, by means of the suction indicators SA and SA′. If the water pump WP were installed at a first lower height, only the suction indicator SA would be drawn into the filter cover FD, since at this height the pressure in the suction line would not be high enough to prevent the suction indicator SA from lowering against the spiral spring SF'' to effect. At a second higher height of the water pump WP in relation to the water to be pumped out, the pressure is then high enough so that the additional suction indicator SA' is also drawn into the filter cover FD. About the spring constants of the spiral springs SF or SF', a range differentiation can be made at the factory. A means of determination FM, as in 7 shown, is not required here, but could be provided, for example, for the additional suction display SA', since this could be reached by a user from below.
  • the suction indicator SA and the additional suction indicator SA ⁇ allow the presence of a suction-side leak to be indicated, since the pin-shaped indicators cannot then be pulled into the filter cover FD. As already mentioned, this is advantageous during commissioning, particularly in the case of large installation heights.
  • the installation height can be up to 8m, with the two-part suction indicator according to 7 a division of up to 4 m for the first suction display SA and from 4 m for the second suction display SA' could be selected.
  • a further embodiment uses automatic venting for this purpose, with essential elements of such a return valve RV in the cross-sectional view according to FIG 9 are sketched.
  • the return valve RV includes a valve plate VT, which opens into a housing plate GP via a valve stem VS.
  • the housing plate GP is arranged on the housing GE.
  • the valve disk VT and the valve stem VS are arranged on the pressure side on the side of the pressure line DL and can be sealed against the suction side of the suction line SL by a sealing ring DR.
  • the valve stem VS is preloaded by a corresponding spiral spring SP, which is supported against the housing plate GP. Accordingly, because of the return valve RV, no water can flow back from the pressure line DL into the suction line SL.
  • the pump is depressurized, so that passage channels DK sealed by a corresponding sealing disk DS in the valve plate VT, which are also held by a lock washer SS, are open, so that water can be brought into the suction line SL via the passage channels DK , and air can escape from the suction line SL via the passage channels DK.
  • the sealing washer DS is arranged directly above the passage channels DK on the side of the pressure line DL and is covered by the locking washer SS.
  • a non-return valve RV is created which both prevents recirculation during normal operation and also enables automatic venting during start-up.
  • the return valve RV can also be supplemented with a switch ST, which can be used to detect dry running or overheating.
  • the valve plate VT is also included provided with a magnet holder MH, which can hold a magnet MT. Outside the line area is the switch ST, which as a REED switch or Hall sensor can detect the displacement of the magnet MT and thus forwards a signal to a control device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
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Description

Die Erfindung betrifft eine Wasserpumpe, insbesondere eine Gartenpumpe oder eine Pumpe eines Hauswasserautomaten.The invention relates to a water pump, in particular a garden pump or a pump for a domestic water pump.

Aus dem allgemeinen Stand der Technik sind Wasserpumpen bekannt, die zur Förderung einer Flüssigkeit als Zentrifugalpumpen oder Jetpumpen ausgebildet sind. Diese werden oftmals mit einem Selbst-Ansaugsystem ausgestattet, wobei jedoch bei größeren Ansaugtiefen eine relativ lange Ansaugzeit erreicht wird.Water pumps are known from the general state of the art, which are designed to convey a liquid as centrifugal pumps or jet pumps. These are often equipped with a self-priming system, but with larger suction depths, a relatively long suction time is achieved.

Derartige Wasserpumpen werden als ortsveränderliche oder fest installierte Pumpen mit einer elektronischen Steuereinheit versehen, typischerweise als Gartenpumpen oder als Bestandteil eines Hauswasserautomaten in Hauswasserwerken verwendet.Such water pumps are provided as portable or permanently installed pumps with an electronic control unit, typically used as garden pumps or as part of a domestic water pump in domestic waterworks.

Pumpen werden oftmals mit einem elektronischen Steuersystem versehen, mittels dessen diverse Zusatzfunktionen oder Sicherheitsfunktionen realisiert werden können.Pumps are often provided with an electronic control system, by means of which various additional functions or safety functions can be implemented.

So ist aus der DE 10 2013 106 970 A1 eine Gartenpumpe bekannt, die mit einer Steuerung ausgestattet wird, so dass bei Inbetriebnahme der Pumpe in der Ansaugphase nach einer Laufzeit von 60 Sekunden eine kurze Pause von 4 Sekunden programmiert ist. Dieser Zyklus kann sich mehrfach wiederholen, bis die Pumpe das Wasser befördert.That's it DE 10 2013 106 970 A1 a garden pump is known, which is equipped with a controller so that when the pump is started up in the suction phase, after a running time of 60 seconds, a short pause of 4 seconds is programmed. This cycle can be repeated several times until the pump moves the water.

Aus der DE 10 2010 026 474 A1 ist eine Gartenpumpenanordnung mit einer durch einen elektrischen Antriebsmotor angetriebenen Pumpe sowie mit einer Steuereinrichtung bekannt, welche einen Durchflusssensor enthält und bei Unterschreiten einer Mindestdurchflußrate durch den Pumpenausgang den Antriebsmotor abschaltet, wobei zwischen Unterschreiten der Mindestdurchflussrate und der Motorabschaltung eine Verzögerungszeit vorgegeben ist. Da die Verzögerungszeit wenigstens 1,5 Minuten beträgt und zum Einschalten des Antriebsmotors nach vorherigem Abschalten unabhängig vom Ausgangsdruck der Pumpe ein vom Benutzer betätigbares Bedienelement vorhanden ist, wird kein Drucksensor mit einer Einschaltschwelle vorgesehen.From the DE 10 2010 026 474 A1 a garden pump arrangement is known with a pump driven by an electric drive motor and with a control device which contains a flow sensor and when the flow falls below the specified value a minimum flow rate through the pump outlet switches off the drive motor, a delay time being specified between falling below the minimum flow rate and the motor switching off. Since the delay time is at least 1.5 minutes and a user-actuable control element is available to switch on the drive motor after it has been switched off beforehand, regardless of the output pressure of the pump, no pressure sensor with a switch-on threshold is provided.

Aus der DE 10 2006 023 379 A1 ist eine Flüssigkeitspumpe mit einem Filter, einem Sauganschluss und einem Druckanschluss bekannt, wobei der Sauganschluss und der Druckanschluss oberhalb beziehungsweise unterhalb einer durch den Schwerpunkt der Flüssigkeitspumpe verlaufenden Ebene angeordnet sind und ein am Filtergehäuse angeordnetes Fenster ermöglicht den Verschmutzungsgrad des Filters zu beurteilen.From the DE 10 2006 023 379 A1 a liquid pump with a filter, a suction connection and a pressure connection is known, the suction connection and the pressure connection being arranged above and below a plane running through the center of gravity of the liquid pump and a window arranged on the filter housing enabling the degree of contamination of the filter to be assessed.

Aus dem Stand der Technik bekannte Gartenpumpen schaffen daher Möglichkeiten, für einzelne eventuell für die Pumpe oder den Benutzer schadhafte Vorgänge, wie Trockenlaufen oder Verbrühungsgefahr mittels elektronischer Steuereinrichtungen entsprechend Abhilfe schaffen zu können. Für eine korrekte Inbetriebnahme sind auch bei selbstansaugenden Pumpen jedoch weitere Schritte durch eine Benutzerin oder einen Benutzer durchzuführen, deren Ausführung sich jedoch üblicherweise nur nach eingehendem Studium der Betriebsanleitung erschließt. Da jedoch zu beobachten ist, dass auch bei komplexen technischen Geräten das Studium der Betriebsanleitungen häufig erst beim Auftreten von Fehlern, nicht jedoch bereits bei der Inbetriebnahme, vorgenommen wird, werden insbesondere bei neuen Benutzerinnen oder Benutzer zwingend vorzunehmende Installationsschritte nicht oder nicht korrekt vorgenommen.Garden pumps known from the state of the art therefore create opportunities to use electronic control devices to remedy individual processes that may damage the pump or the user, such as running dry or the risk of scalding. However, for correct commissioning, even with self-priming pumps, additional steps must be carried out by the user, the execution of which, however, is usually only revealed after a thorough study of the operating instructions. However, since it can be observed that, even with complex technical devices, the operating instructions are often only studied when errors occur, but not already during commissioning, installation steps that are mandatory, especially for new users, are not carried out or are not carried out correctly.

Es ist daher Aufgabe der Erfindung, eine Wasserpumpe zu schaffen, die bezüglich der Erstinstallation und allen weiteren Erstinbetriebnahmen einen erhöhten Bedienungskomfort aufweist.It is therefore the object of the invention to create a water pump which is more user-friendly with regard to the initial installation and all further initial start-ups.

Diese Aufgabe wird durch den unabhängigen Patentanspruch 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung sind jeweils Gegenstand der Unteransprüche. Diese können in technologisch sinnvoller Weise miteinander kom biniert werden. Die Beschreibung, insbesondere im Zusammenhang mit der Zeichnung charakterisiert und spezifiziert die Erfindung zusätzlich.Independent claim 1 solves this problem. Further advantageous configurations of the invention are the subject matter of the dependent claims. These can be combined with one another in a technologically sensible manner become. The description, in particular in connection with the drawing, additionally characterizes and specifies the invention.

Gemäß der Erfindung wird eine Wasserpumpe, insbesondere eine Gartenpumpe oder eine Pumpe eines Hauswasserautomaten, angegeben, die in einem Gehäuse eine mittels Elektromotor antreibbare Pumpeinheit aufweist, die als Förderflüssigkeit Wasser von einer Saugleitung zu einer Druckleitung pumpen kann, wobei das Gehäuse ein mit der Saugleitung verbundenes Pumpengehäuse und ein sich an das Pumpengehäuse anschließenden Gehäuse-Fortsatz mit der Druckleitung umfasst, wobei der Gehäuse-Fortsatz als Abschluss eine Filtereinheit aufweist und zwischen der Saugleitung und der Druckleitung ein wenigstens teilweise transparentes Fenster angeordnet ist, so dass vor Betrieb der Pumpe ein Flüssigkeitsstand innerhalb des Gehäuses an dem Pumpengehäuse von außen ablesbar ist, und wobei die Filtereinheit eine Sauganzeige aufweist, so dass das Vorliegen von Ansaugdruck in dem Pumpengehäuse über die Sauganzeige oder auch eine Leckage an der Saugleitung erkennbar ist.According to the invention, a water pump, in particular a garden pump or a pump of a domestic water pump, is specified, which has a pump unit in a housing that can be driven by an electric motor and that can pump water as the delivery liquid from a suction line to a pressure line, the housing having a pump connected to the suction line Pump housing and a housing extension with the pressure line that is connected to the pump housing, the housing extension having a filter unit as a closure and an at least partially transparent window being arranged between the suction line and the pressure line, so that before the pump is operated, there is a liquid level inside of the housing on the pump housing can be read from the outside, and the filter unit has a suction indicator so that the presence of suction pressure in the pump housing can be identified via the suction indicator or a leak in the suction line.

Demnach wird eine Wasserpumpe angegeben, bei der das Befüllen der Saugleitung vor Inbetriebnahme angezeigt wird, indem ein zumindest teilweise transparentes Fenster am Gehäuse angeordnet ist. Für eine Benutzerin oder einen Benutzer ist daher zu erkennen, dass die Saugleitung bis zum vorgeschriebenen Flüssigkeitsstand mit der Förderflüssigkeit befüllt wurde. Da die Pumpengehäuse typischerweise bei Pumpen aus dem Stand der Technik aus undurchsichtigen Materialien bestehen, erhält die Benutzerin oder der Benutzer keinerlei Informationen dahingehend, ob Wasser sich in der Pumpe befinden würde oder nicht. Da Pumpen in manchen Anwendungsfällen auch ohne Rücklaufventil ausgeführt sein können und darüber hinaus bei einer Erstinstallation typischerweise mit völlig entleerter Saugleitung vorliegen, ist es daher für den sicheren Betrieb der Wasserpumpe erforderlich, die Installationsschritte entsprechend den Anweisungen der Bedienungsanleitung auszuführen. Falls dies nicht geschehen würde, besteht die Gefahr, dass beispielsweise eine Dichtung der Pumpe beschädigt werden könnte, falls die Pumpe für längere Zeit trocken läuft. Die Erfindung schafft nun dahingehend Abhilfe, dass über das teilweise transparente Fenster der Flüssigkeitsstand innerhalb des Gehäuses von außen ablesbar ist, so dass der Benutzerin oder dem Benutzer signalisiert wird, ob hier eventuell noch Installationsmaßnahmen zu treffen sind. Aufgrund dieser Vorgehensweise reduziert sich die Gefahr, dass die Pumpe entgegen den Anweisungen der Bedienungsanleitung betrieben werden würde, ganz erheblich. Die ist insbesondere dann wichtig, wenn die Wasserpumpe von einem tiefer liegenden Niveau, typischerweise von zwei Metern oder mehr, Wasser ansaugen muss, da hier der durch die Wasserpumpe aufgebaute Saugdruck nicht ausreicht, um die Saugleitung zu füllen. Neben einer Befüllung der Saugleitung ist jedoch für eine korrekte Funktionsweise auch das Vorliegen von Ansaugdruck wichtig. Dazu stellt die Erfindung eine im Bereich der Filtereinheit eine Sauganzeige bereit. Insbesondere beim Ansaugen von Wasser aus einem tief liegenden Niveau, beispielsweise von bis zu 8 m, kann es erforderlich sein, dass die Pumpe für längere Zeit trocken läuft, um Wasser aus diesem Bereich anzusaugen. Während dieser Zeit erhält jedoch ein Benutzer bei Pumpen aus dem Stand der Technik keine Information darüber, ob der Ansaugvorgang korrekt abläuft. Sollte beispielsweise eine Leckstelle saugseitig vorliegen, würde die Pumpe darüber hinaus für noch längere Zeit ohne Ansaugen von Wasser trocken laufen, so dass lediglich über ein Zeitfenster eine Abschaltung erfolgen kann. Da jedoch auch während des Zeitfensters ein entsprechender Ansaugdruck durch die Pumpe bei erfolgreichem Ansaugen vorliegt, wird daher mittels der Sauganzeige von außen zuverlässig signalisiert, dass der Ansaugvorgang erfolgreich durchlaufen werden wird, ohne dabei lediglich abwartend das Ansaugergebnis absehen zu müssen. In diesem Fall wäre jedenfalls auf Seiten des Wasserreservoirs eine korrekte Installation gegeben, da andernfalls kein Ansaugdruck angezeigt werden könnte. Sollte jedoch bei korrekt angezeigtem Ansaugverhalten über die Sauganzeige dennoch keine Flüssigkeit angesaugt werden, käme allenfalls eine nicht vollständige Abdichtung an der Verbindung zur Saugleitung als mögliche Fehlerquelle in Frage. Durch das Anzeigen von Ansaugdruck an dem Filterdeckel über die Sauganzeige wird daher die Betriebssicherheit der Wasserpumpe deutlich verbessert.Accordingly, a water pump is specified in which the filling of the suction line is indicated before start-up by an at least partially transparent window being arranged on the housing. A user can therefore see that the suction line has been filled with the pumped liquid up to the prescribed liquid level. Since the pump housings of prior art pumps are typically made of opaque materials, the user is not given any information as to whether or not water would be in the pump. Since pumps can also be designed without a return valve in some applications and, moreover, are typically present with a completely emptied suction line when first installed, it is therefore for required for the safe operation of the water pump to carry out the installation steps according to the instructions in the user manual. If this were not done, there is a risk that, for example, a pump seal could be damaged if the pump runs dry for a long period of time. The invention now provides a remedy in that the liquid level inside the housing can be read from the outside via the partially transparent window, so that the user is informed whether installation measures may still have to be taken here. This procedure significantly reduces the risk of the pump being operated contrary to the instructions in the operating manual. This is particularly important when the water pump has to suck in water from a lower level, typically two meters or more, since the suction pressure built up by the water pump is not sufficient here to fill the suction line. In addition to filling the suction line, the presence of suction pressure is also important for correct functioning. For this purpose, the invention provides a suction indicator in the area of the filter unit. In particular, when raising water from a low level, for example up to 8m, it may be necessary for the pump to run dry for an extended period of time in order to draw water from this area. During this time, however, with pumps from the prior art, a user does not receive any information as to whether the suction process is taking place correctly. If, for example, there was a leak on the suction side, the pump would also run dry for a long time without sucking in water, so that it could only be switched off for a specific time window. However, since there is also a corresponding suction pressure from the pump during the time window if suction is successful, the suction display reliably signals from the outside that the suction process will be completed successfully without having to wait and see the result of the suction. In this case In any case, the water reservoir would have been correctly installed, since otherwise no intake pressure could be displayed. However, if no liquid is sucked in when the suction behavior is correctly displayed on the suction display, an incomplete seal at the connection to the suction line could be a possible source of error. The operational reliability of the water pump is therefore significantly improved by displaying the suction pressure on the filter cover via the suction display.

Gemäß einer weiteren Ausführungsform der Erfindung übt die Sauganzeige während des Ansaugens von Flüssigkeit einen Druck auf ein Anzeigeelement aus, so dass Ansaugdruck an einem Filterdeckel erkennbar ist.According to a further embodiment of the invention, the suction indicator exerts pressure on a display element while liquid is being sucked in, so that the suction pressure can be seen on a filter cover.

Dabei kann der Druck über eine Membran auf die Sauganzeige ausgeübt werden, die von einer auf der vom Filterdeckel abgewandten Seite angeordneten Aufnahme gehalten ist. Die Membran kann gegenüber der Aufnahme mittels eines federelastischen Elements, insbesondere einer Spiralfeder oder einer bezüglich ihrer Vorspannung verstellbaren Spiralfeder mit einer Kraft beaufschlagt sein. Ebenso ist es möglich, eine, vorzugsweise zur Sauganzeige koaxial angeordnete, weitere Sauganzeige vorzusehen.The pressure can be exerted on the suction indicator via a membrane, which is held by a receptacle arranged on the side facing away from the filter cover. A force can be applied to the membrane relative to the receptacle by means of a spring-elastic element, in particular a spiral spring or a spiral spring whose pretension can be adjusted. It is also possible to provide a further suction indicator, preferably arranged coaxially to the suction indicator.

Demnach können sowohl feste als auch veränderliche oder auch mehrere Bereiche von Ansaugdruck angezeigt werden. Je nach Einsatzgebiet und damit einhergehender Installationshöhe der Wasserpumpe kann werksseitig daher eine entsprechende Voreinstellung durch Auswahl der passenden Sauganzeige getroffen werden.Accordingly, fixed as well as variable or multiple ranges of intake pressure can be displayed. Depending on the area of application and the associated installation height of the water pump, a corresponding presetting can be made at the factory by selecting the appropriate suction indicator.

Um den Flüssigkeitsstand im Inneren der Wasserpumpe ablesen zu können, ist es gemäß einer vorteilhaften Ausführungsform der Erfindung vorgesehen, das Fenster direkt am Pumpengehäuse anzuordnen, wobei hier beispielsweise eine Ausgestaltung in Form eines Bullauges oder einer kleinen schlitzartigen Fensteröffnung möglich wäre. Es ist jedoch in anderen Ausführungsformen ebenfalls vorgesehen, das wenigstens teilweise transparente Fenster an dem vorzugsweise zylinderförmig ausgebildeten Gehäuse-Fortsatz anzuordnen, wobei dies sowohl dadurch erfolgen kann, dass der Gehäuse-Fortsatz mit einer ebenfalls schlitzförmigen Ausgestaltung des transparenten Fensters versehen wird, so dass der Wasserstand zwischen Saugleitung und Druckleitung von außen ablesbar ist. In einer wiederum anderen Ausführungsform ist es vorgesehen, dass das wenigstens teilweise transparente Fenster Bestandteil der vorzugsweise als Einfüllöffnung fungierenden Filtereinheit ist. Da die Filtereinheit typischerweise auch als Einfüllöffnung benutzt werden kann und somit den Abschluss des Gehäuse-Fortsatzes bildet, ist an dieser Stelle aufgrund der transparenten Ausführung des Gehäuses sowohl das korrekte Befüllen der Saugleitung als auch zusätzlich eventuelles Ansammeln von Material im Filter von außen ablesbar. Die Filtereinheit weist dazu Seitenwände auf, die zumindest abschnittsweise, vorzugsweise vollständig aus einem optisch wenigstens teilweise transparenten Material hergestellt sein können.In order to be able to read the liquid level inside the water pump, it is provided according to an advantageous embodiment of the invention that To arrange windows directly on the pump housing, in which case, for example, an embodiment in the form of a porthole or a small slit-like window opening would be possible. However, other embodiments also provide for the at least partially transparent window to be arranged on the preferably cylindrical housing extension, whereby this can be done by providing the housing extension with a transparent window that is also slit-shaped, so that the The water level between the suction line and the pressure line can be read from the outside. In yet another embodiment, it is provided that the at least partially transparent window is a component of the filter unit, which preferably functions as a filling opening. Since the filter unit can typically also be used as a filling opening and thus forms the end of the housing extension, the transparent design of the housing means that both the correct filling of the suction line and any additional accumulation of material in the filter can be read from the outside at this point. For this purpose, the filter unit has side walls which can be produced at least in sections, preferably completely, from an optically at least partially transparent material.

Die vorgenannten Maßnahmen ermöglichen einzeln und in Kombination einen hohen Benutzungskomfort, insbesondere bei der Wartung oder der Inbetriebnahme der Wasserpumpe. Darüber hinaus es ist es auch möglich, sowohl alternativ als auch zusätzlich anstelle des Ablesens über das transparente Fenster seitens des Benutzers einen Flüssigkeitssensor vorzusehen, der den Flüssigkeitsstand im Bereich des Pumpengehäuses detektiert und am transparenten Fenster signalisiert. Demnach wird die korrekte Befüllung der Saugleitung automatisch angezeigt, wobei das transparente Fenster in diesem Fall die Abdeckung beispielsweise einer Leuchtdiode wäre. Eine Ankopplung des Flüssigkeitssensors an eine Steuereinheit, die beispielsweise eine Inbetriebnahme bei Nichtbefüllung verhindern könnte, ist im Rahmen der Erfindung ebenfalls vorgesehen.Individually and in combination, the aforementioned measures enable a high level of user comfort, in particular during maintenance or the commissioning of the water pump. In addition, it is also possible to provide a liquid sensor, both alternatively and additionally, instead of reading through the transparent window on the part of the user, which detects the liquid level in the area of the pump housing and signals it at the transparent window. Accordingly, the correct filling of the suction line is automatically displayed, with the transparent window in this case being the cover of a light-emitting diode, for example. A coupling of the liquid sensor to a control unit, for example, a start-up could prevent non-filling is also provided within the scope of the invention.

Gemäß einer weiteren Ausführungsform der Erfindung ist an der Druckleitung ein Drucksensor angeordnet, der mit einer Steuereinheit verbunden ist.According to a further embodiment of the invention, a pressure sensor is arranged on the pressure line, which is connected to a control unit.

Die Kombination aus Drucksensor und Steuereinheit ermöglicht insbesondere das Erkennen von Druckverlust auf der Verbraucherseite, so dass in Kombination mit einem Druckreservoir, beispielsweise ein Wassertank oder dergleichen, ein Hauswasserautomat geschaffen werden kann, der auch auf Druckverlust auf der Verbraucherseite nur mit Verzögerung reagiert. Desweiteren kann der Drucksensor über die Steuereinheit Statusanzeigen aktivieren, die beispielsweise in Form von LEDs entsprechende Betriebszustände der Wasserpumpe anzeigen können.The combination of pressure sensor and control unit makes it possible in particular to detect pressure loss on the consumer side, so that in combination with a pressure reservoir, for example a water tank or the like, a domestic water automat can be created which only reacts to pressure loss on the consumer side with a delay. Furthermore, the pressure sensor can activate status displays via the control unit, which can display corresponding operating states of the water pump, for example in the form of LEDs.

Gemäß einer weiteren Ausführungsform der Erfindung ist ein Rücklaufventil vorgesehen, das Bestandteil der als Einfüllöffnung dienenden Filtereinheit ist.According to a further embodiment of the invention, a non-return valve is provided, which is part of the filter unit serving as a filling opening.

Um die Saugleitung zu Beginn der Inbetriebnahme entsprechend befüllen zu können, wird auf Seiten der Wasserpumpe die Förderflüssigkeit über die Einfüllöffnung eingebracht. Das Rücklaufventil soll jedoch genau dies verhindern, so dass es während der Inbetriebnahme außer Betrieb gesetzt werden muss, sofern das Einfüllen der Förderflüssigkeit oberhalb des Rücklaufventils vorgenommen werden soll. In dem das Rücklaufventil Bestandteil der Einfüllöffnung ist, wird durch Entfernen der Einfüllöffnung das Rücklaufventil zwangsweise außer Betrieb genommen.In order to be able to fill the suction line appropriately at the start of commissioning, the liquid to be pumped is introduced via the filling opening on the water pump side. However, the return valve is intended to prevent precisely this, so that it must be deactivated during commissioning if the pumped liquid is to be filled in above the return valve. In that the return valve is part of the filling opening, the return valve is forcibly taken out of service by removing the filling opening.

In einer anderen Ausführungsform ist ein Rücklaufventil vorgesehen, das eine automatische Entlüftung aufweist.In another embodiment, a return valve is provided which has an automatic vent.

Sofern nun die Befüllung der Saugleitung bei Erstinbetriebnahme unterhalb des Rücklaufventils vorgenommen werden soll, ist dennoch eine Entlüftungsmöglichkeit vorzusehen, um die in der Saugleitung vorhandene Luft entsprechend abführen zu können. Die Erfindung stellt hier eine automatische Entlüftung bereit, die beispielsweise ohne Zutun eines Benutzers oder einer Benutzerin die austretende Luft ableiten kann.If the suction line is to be filled below the return valve during initial start-up, a ventilation option must be provided so that the air in the suction line can be discharged accordingly. The invention provides an automatic ventilation system here, which can, for example, divert the escaping air without the user having to do anything.

Für eine automatische Entlüftung kann das Rücklaufventil wenigstens einen Durchlasskanal aufweisen, der bei geschlossenem Rücklaufventil als Entlüftung beim Befüllen der Saugleitung mit Förderflüssigkeit dient, wobei der wenigstens eine Durchlasskanal bei Aktivierung der Pumpeinheit über einen Dichtring verschließbar ist. Dabei kann der Durchlasskanal an einem Ventilteller des Rücklaufventils angeordnet sein. Der Dichtring kann mit einer darüber liegenden Stellscheibe auf der Seite der Druckleitung entlang eines Ventilschafts des Rücklaufventils unter Federvorspannung verschiebbar angeordnet sein.For automatic venting, the return valve can have at least one passage which, when the return valve is closed, serves as a vent when the suction line is filled with pumped liquid, the at least one passage being closable via a sealing ring when the pump unit is activated. In this case, the passage channel can be arranged on a valve plate of the return valve. The sealing ring can be arranged with an overlying adjusting disk on the side of the pressure line so as to be displaceable under spring preload along a valve stem of the return valve.

Bei dieser Ausführung kann das Rückschlagventil in die Wasserpumpe integriert eingebaut werden, wobei die Belüftung der Wasserpumpe beim Befüllen mit Wasser auf Seiten der Saugleitung ohne manuellen Eingriff erfordert, indem Durchlasskanäle am Ventilteller vorgesehen sind, die mit einer Dichtscheibe und einer Stützscheibe abgesichert sind. Beim Befüllen von Wasser in die Saugleitung ist die Pumpe drucklos, so dass der Dichtring den Durchlasskanal offen lässt, so dass Luft durch die Durchlasskanäle austreten kann. Die Größe der Durchlasskanäle ist dabei so gewählt, dass das Wasser in die Saugleitung fließen kann, während gleichzeitig die Luft ausweichen kann. Während des Betriebs der Wasserpumpe entsteht Druck in der Druckkammer und die Dichtscheibe schließt sich.With this design, the non-return valve can be integrated into the water pump, whereby the venting of the water pump when filling with water on the suction line side requires no manual intervention by providing passage channels on the valve disk, which are secured with a sealing washer and a support washer. When filling water into the suction line, the pump is depressurized so that the sealing ring leaves the passage channel open so that air can escape through the passage channels. The size of the passage channels is selected in such a way that the water can flow into the suction line while the air can escape at the same time. During operation of the water pump, pressure builds up in the pressure chamber and the sealing disk closes.

Zusätzlich ist es vorgesehen, dass das Rücklaufventil einen Schalter betätigt, der im Falle eines Trockenlaufens ein Signal an eine Steuereinrichtung abgibt.In addition, provision is made for the return valve to actuate a switch which emits a signal to a control device in the event of dry running.

Demnach wird insbesondere bei längerer Ansaugzeit aufgrund von Wasserblasen oder erhöhter Wassertemperatur der Zustand des Trockenlaufens zuverlässig erkannt, so dass die Steuereinrichtung mit einer entsprechenden Zeitvorgabe für die maximal vorliegende Trockenlaufzeit einen sicheren Pumpbetrieb überwachen kann. Der Schalter wird dabei vorzugsweise magnetisch aktiviert, so dass beispielsweise ein REED-Schalter oder ein Hall-Sensor zu verwenden ist, der mittels eines am Rücklaufventil angeordneten Magneten betätigt wird. Alternativ oder zusätzlich kann der Schalter auch eine Verbrüh-Sicherung auslösen, die beispielsweise dann aktiviert wird, falls die Wasserpumpe gegen eine geschlossene Druckleitung betrieben wird, wobei dann das Wasser innerhalb der Wasserpumpe durch die Pumpeinheit erwärmt wird.Accordingly, the state of dry running is reliably detected, particularly in the case of a longer suction time due to water bubbles or increased water temperature, so that the control device can monitor safe pump operation with a corresponding time specification for the maximum dry running time present. The switch is preferably activated magnetically, so that, for example, a REED switch or a Hall sensor can be used, which is actuated by means of a magnet arranged on the return valve. Alternatively or additionally, the switch can also trigger a scalding protection, which is activated, for example, if the water pump is operated against a closed pressure line, the water inside the water pump then being heated by the pump unit.

Nachfolgend werden einige Ausführungsbeispiele anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Seitenansicht auf einen Teil einer erfindungsgemäßen Wasserpumpe gemäß einer ersten Ausführungsform der Erfindung,
Fig. 2
eine perspektivische Seitenansicht auf einen Teil einer erfindungsgemäßen Wasserpumpe gemäß einer zweiten Ausführungsform der Erfindung,
Fig. 3
eine perspektivische Seitenansicht auf einen Teil einer erfindungsgemäßen Wasserpumpe gemäß einer dritten Ausführungsform der Erfindung,
Fig. 4
einen Querschnitt durch einen Filterdeckel für eine erfindungsgemäße Wasserpumpe gemäß einer perspektivischen Seitenansicht,
Fig. 5
eine Querschnittsansicht durch einen weiteren Filterdeckel für eine erfindungsgemäße Wasserpumpe,
Fig. 6
eine Querschnittsansicht durch einen weiteren Filterdeckel für eine erfindungsgemäße Wasserpumpe,
Fig. 7
eine Querschnittsansicht durch einen weiteren Filterdeckel für eine erfindungsgemäße Wasserpumpe,
Fig. 8
eine Querschnittsansicht durch einen weiteren Filterdeckel für eine erfindungsgemäße Wasserpumpe, und
Fig. 9
ein Rücklaufventil mit einer automatischen Entlüftung für eine erfindungsgemäße Wasserpumpe.
Some exemplary embodiments are explained in more detail below with reference to the drawing. Show it:
1
a perspective side view of part of a water pump according to the invention according to a first embodiment of the invention,
2
a perspective side view of part of a water pump according to the invention according to a second embodiment of the invention,
3
a perspective side view of part of a water pump according to the invention according to a third embodiment of the invention,
4
a cross section through a filter cover for a water pump according to the invention according to a perspective side view,
figure 5
a cross-sectional view through another filter cover for a water pump according to the invention,
6
a cross-sectional view through another filter cover for a water pump according to the invention,
7
a cross-sectional view through another filter cover for a water pump according to the invention,
8
a cross-sectional view through a further filter cover for a water pump according to the invention, and
9
a return valve with an automatic vent for a water pump according to the invention.

In den Figuren sind gleiche oder funktional gleich wirkende Bauteile mit den gleichen Bezugszeichen versehen.In the figures, identical or functionally identical components are provided with the same reference symbols.

In Fig. 1 ist in einer perspektivischen Seitenansicht von schräg oben eine erfindungsgemäße Wasserpumpe mit denjenigen Bestandteilen gezeigt, die für die Erläuterung der Erfindung wesentlich sind. Die weiteren, für die Ausführung der Erfindung notwendigen Bestandteile, sind einem auf diesem Gebiet tätigen Fachmann jedoch bekannt.In 1 a water pump according to the invention is shown in a perspective side view obliquely from above, with those components which are essential for explaining the invention. However, the other components necessary for the implementation of the invention are known to a person skilled in the art.

Die Wasserpumpe WP umfasst in der Darstellung gemäß Fig. 1 ein Gehäuse GE, das aus einem Pumpengehäuse PG sowie einem sich daran anschließenden zylindrisch ausgebildeten Gehäuse-Fortsatz GF gebildet wird. Auf der Unterseite des Pumpengehäuses PG befindet sich ein Ablauf AB. Am oberen Ende des zylindrisch ausgebildeten Gehäuse-Fortsatz GF ist ein Anschluss für eine Saugleitung SL angebracht. Über einen Flansch FN am Pumpengehäuse PG ist typischerweise die von einem Elektromotor angetriebene Pumpeinheit (nicht in Fig. 1 gezeigt) angeordnet.The water pump WP includes in the representation according to 1 a housing GE, which is formed from a pump housing PG and an adjoining cylindrical housing extension GF. There is a drain AB on the underside of the pump housing PG. A connection for a suction line SL is attached to the upper end of the cylindrically designed housing extension GF. The pump unit driven by an electric motor (not in 1 shown) arranged.

Der Gehäuse-Fortsatz GF wird von einer Filtereinheit FT abgeschlossen, die auf ihrer Oberseite einen Filterdeckel FD aufweist. Desweiteren ist der Gehäuse-Fortsatz GF mit einem Anschluss für eine Druckleitung DL verbunden, der das über die Saugleitung SL angesaugte Wasser entsprechend der Anwendung der Wasserpumpe weitergeben kann. Zur Kontrolle eventueller Ansammlung von Fremdkörpern innerhalb der Filtereinheit FT kann optional ein durchsichtiges Fenster (nicht in Fig. 1 gezeigt) vorgesehen sein, das insbesondere dann vorteilhaft ist, wenn das Filtergehäuse aus nicht transparentem Material hergestellt ist. Der Gehäuse-Fortsatz GF bzw. das Pumpengehäuse PG werden typischerweise ebenfalls aus opakem Kunststoffmaterial oder metallischen Materialien gefertigt sein.The housing extension GF is completed by a filter unit FT, which has a filter cover FD on its upper side. Furthermore, the housing extension GF is connected to a connection for a pressure line DL, which can pass on the water sucked in via the suction line SL according to the application of the water pump. A transparent window (not in 1 shown) may be provided, which is particularly advantageous when the filter housing is made of non-transparent material. The housing extension GF and the pump housing PG are typically also made of opaque plastic material or metallic materials.

Während der Erstinbetriebnahme ist es notwendig, das Pumpengehäuse PG mit Wasser als Förderflüssigkeit zu befüllen. Um nun während der Inbetriebnahme erkennen zu können, dass das Pumpengehäuse PG mit Förderflüssigkeit gefüllt wurde, ist erfindungsgemäß ein transparentes Fenster FE vorgesehen, das bei korrekter Befüllung den Flüssigkeitsstand FL von außen ablesbar macht. In dem in Fig. 1 gezeigten Beispiel wird der Flüssigkeitsstand FL über ein am Pumpengehäuse PG angebrachtes transparentes Fenster FE signalisiert. Das korrekte Befüllen mit Förderflüssigkeit kann dabei nicht nur über einen Flüssigkeitsstand FL innerhalb des transparenten Fensters FE angezeigt werden sondern allgemein auch durch ein vollständiges Bedecken des transparenten Fensters FE mit Förderflüssigkeit, so dass lediglich die Anwesenheit nicht aber der genaue Füllstand der Förderflüssigkeit angezeigt wird. Beides wird gemäß der Erfindung unter dem Begriff als Flüssigkeitsstand FL verstanden. Alternativ oder zusätzlich kann auch ein Schraubdeckel SD aus transparenten Material oder mit einem transparenten Einsatz vorgesehen sein.During the initial start-up it is necessary to fill the pump housing PG with water as the liquid to be pumped. In order to be able to recognize during start-up that the pump housing PG has been filled with pumped liquid, a transparent window FE is provided according to the invention, which makes it possible to read the liquid level FL from the outside if the filling is correct. in the in 1 In the example shown, the liquid level FL is signaled via a transparent window FE attached to the pump housing PG. The correct filling with pumped liquid can not only be done with one Liquid level FL are displayed within the transparent window FE but generally also by completely covering the transparent window FE with pumped liquid, so that only the presence but not the exact level of the pumped liquid is displayed. According to the invention, both are understood by the term liquid level FL. Alternatively or additionally, a screw cap SD made of transparent material or with a transparent insert can also be provided.

Weitere Ausführungsformen für das transparente Fenster FE werden weiter unten unter Bezugnahme auf die Figuren 2 und 3 näher beschrieben.Further embodiments for the transparent window FE are described below with reference to FIG figures 2 and 3 described in more detail.

Nach erfolgter korrekter Befüllung saugt die Wasserpumpe WP an der Saugleitung SL Förderflüssigkeit an. Dies wird über eine im Filterdeckel FD angeordnete Sauganzeige SA angezeigt, die in Form eines Stiftes ausgeführt ist, wobei die Sauganzeige SA vor dem Betrieb aus dem Filterdeckel FD hervortritt und während des Betriebs der Wasserpumpe WP in den Filterdeckel FD hineingeschoben wird. Detaillierte Ausführungsformen werden weiter unten unter Bezugnahme auf die Figuren 4 bis 8 näher beschrieben.After the correct filling has taken place, the water pump WP draws in the pumped liquid from the suction line SL. This is indicated by a suction indicator SA arranged in the filter cover FD, which is designed in the form of a pen, the suction indicator SA protruding from the filter cover FD before operation and being pushed into the filter cover FD during operation of the water pump WP. Detailed embodiments are described below with reference to FIG Figures 4 to 8 described in more detail.

Zwischen Druckleitung DL und Saugleitung SL kann, wie weiter unten unter Bezugnahme auf Fig. 9 beschrieben wird, ein Rücklaufventil angebracht sein. Um die nach dem Rücklaufventil in der Druckleitung DL befindliche Förderflüssigkeit beispielsweise bei einer Außerbetriebnahme der Wasserpumpe WP entleeren zu können, ist der Ablauf AB vorgesehen, so dass durch Herstellen einer Öffnung die in der Druckleitung DL befindliche Förderflüssigkeit ablaufen kann.Between pressure line DL and suction line SL, as further below with reference to 9 described, a non-return valve may be fitted. In order to be able to empty the pumped liquid in the pressure line DL after the return valve, for example when the water pump WP is shut down, the outlet AB is provided so that the pumped liquid in the pressure line DL can drain off by making an opening.

Eine weitere Ausführungsform der Wasserpumpe WP ist unter Bezugnahme auf Fig. 2 gezeigt. Hier wird die Wasserpumpe WP in einer perspektivischen Seitenansicht in Richtung einer Vorderseite dargestellt. Man erkennt, dass der Gehäuse-Fortsatz GF mit einem in länglicher Form ausgeführten transparenten Fenster FE versehen ist, über den das korrekte Befüllen der Saugleitung SL an der Wasserpumpe WP anhand des Flüssigkeitsstands FL ablesbar ist.Another embodiment of the water pump WP is with reference to FIG 2 shown. Here the water pump WP in a perspective Side view shown toward a front. It can be seen that the housing extension GF is provided with an elongated transparent window FE, via which the correct filling of the suction line SL at the water pump WP can be read using the liquid level FL.

Eine weitere Ausführungsform der Wasserpumpe WP ist in Fig. 3 gezeigt. Fig. 3 zeigt die Pumpe in einer perspektivischen Seitenansicht, wobei hier im Unterschied zu der vorherigen Ausführungsform das Gehäuse der Filtereinheit FT aus einem transparenten Kunststoffmaterial besteht, so dass der Flüssigkeitsstand FL innerhalb der Seitenwände der Filtereinheit FT ablesbar ist. Die Filtereinheit FT weist dazu Seitenwände auf, die zumindest abschnittsweise vorzugsweise jedoch vollständig aus einem optisch transparenten Material hergestellt sind.Another embodiment of the water pump WP is in 3 shown. 3 shows the pump in a perspective side view, in which case, in contrast to the previous embodiment, the housing of the filter unit FT consists of a transparent plastic material, so that the liquid level FL can be read within the side walls of the filter unit FT. For this purpose, the filter unit FT has side walls which, at least in sections, but preferably completely, are made of an optically transparent material.

Alternativ oder zusätzlich zu den Ausführungsformen gemäß den Fig. 1 bis 3 wäre es auch möglich, einen Flüssigkeitssensor anzubringen, der elektronisch für einen Nachweis des Vorliegens von Förderflüssigkeit innerhalb des Gehäuses GE sorgen kann.Alternatively or in addition to the embodiments according to Figures 1 to 3 it would also be possible to attach a liquid sensor which can electronically provide evidence of the presence of conveyed liquid within the housing GE.

Wie in Fig. 1 gezeigt ist, weist die Filter-Einheit FT einen Filterdeckel FD auf, der gemäß weiteren Ausführungsformen der Erfindung mit einer Sauganzeige SA ausgestattet sein kann. Die Sauganzeige SA wird nachfolgend detaillierter unter Bezugnahme auf Fig. 4 bis Fig. 8 in mehreren Ausführungsformen beschrieben.As in 1 is shown, the filter unit FT has a filter cover FD which, according to further embodiments of the invention, can be equipped with a suction indicator SA. The suction indicator SA is described in more detail below with reference to FIG Figures 4 to 8 described in several embodiments.

In Fig. 4 ist der Filterdeckel FD schematisch in einer perspektivischen Querschnittansicht gezeigt. Man erkennt, dass eine Membran MB, die eine gewisse axiale Federkraft ausüben kann, nach außen hin in eine Dichtung DI mündet, so dass zwischen einer Aufnahme AU und dem Filterdeckel FD ein wasserdichter Abschluss ermöglicht ist. In einem zentralen Teil ist die Membran MB mit der Sauganzeige SA versehen, die durch eine Öffnung im Filterdeckel FD nach außen geführt sein kann, wobei die Membran MB über einen Kanal KA bei Vorliegen eines Drucks im Inneren der Filtereinheit FT entsprechend die Sauganzeige SA nach innen zieht bzw. ohne Vorliegen eines Drucks nach außen schiebt. Dadurch ist es möglich, über die als stiftförmiges Anzeigeelement ausgebildete Sauganzeige SA das Vorliegen eines Saugdrucks im Inneren der Wasserpumpe zu detektieren und einer Benutzerin oder einem Benutzer anzuzeigen.In 4 the filter cover FD is shown schematically in a perspective cross-sectional view. It can be seen that a membrane MB, which can exert a certain axial spring force, opens out into a seal DI so that a watertight seal is formed between a receptacle AU and the filter cover FD completion is possible. In a central part, the membrane MB is provided with the suction indicator SA, which can be routed to the outside through an opening in the filter cover FD, with the membrane MB corresponding to the suction indicator SA inward via a channel KA when there is pressure inside the filter unit FT pulls or pushes outwards without the presence of pressure. This makes it possible to detect the presence of a suction pressure inside the water pump via the suction indicator SA, which is designed as a pin-shaped display element, and to display this to a user.

Eine weitere Ausführungsform ist in Fig. 5 in einer Querschnittansicht gezeigt. Hier befindet sich die Dichtung DI innerhalb des Kanals KA an einem zylinderförmigen Stab der Sauganzeige SA. Die Membran MB ist zusammen mit der Sauganzeige SA zwischen Aufnahme AU und Filterdeckel FD angeordnet. Auch hier wird die Membran MB mit einer entsprechenden axialen Federkraft ausgestattet, wobei das Vorliegen von Saugdruck ebenfalls wie oben beschrieben für ein axiales Verschieben der Sauganzeige SA durch den Filterdeckel FD hindurch sorgen kann.Another embodiment is in figure 5 shown in a cross-sectional view. Here the seal DI is located within the channel KA on a cylindrical rod of the suction indicator SA. The membrane MB is arranged together with the suction indicator SA between the mount AU and the filter cover FD. Here, too, the membrane MB is equipped with a corresponding axial spring force, with the presence of suction pressure also being able to ensure an axial displacement of the suction indicator SA through the filter cover FD, as described above.

Eine weitere Ausführungsform einer Sauganzeige SA ist in Fig. 6 in einer Querschnittansicht gezeigt. Die Sauganzeige SA ist wiederum mit einer an einer Aufnahme AU angeordneten Membran MB verbunden, die unterhalb des Filterdeckels FD angeordnet ist, so dass die Sauganzeige SA durch axiales Verschieben den Filterdeckel FD durchdringen kann. Die Sauganzeige SA weist jedoch im Gegensatz zur vorher beschriebenen Ausführungsform gemäß Fig. 5 quer zur axialen Verschieberichtung größere Außenmaße auf, so dass die Sauganzeige SA nicht nur lediglich in Form eines stiftförmigen Anzeigeelements sondern in Form einer vergrößerten Tastfläche am Filterdeckel FD vorliegt. Auf der der Membran MB gegenüberliegenden Seite ist an der Aufnahme AU eine Spiralfeder SF vorgesehen, die über ein Federteller FE mit der Sauganzeige SA bzw. der Membran MB in Verbindung steht. Das Federteller FE verhindert, dass die Spiralfeder SF mit der Membran MB in Berührung steht, was eventuell zu Beschädigungen führen könnte oder zumindest die Montage erschweren würde. Im Inneren der Spiralfeder SF ist wiederum der Kanal KA angeordnet, so dass bei entsprechendem Saugdruck ein axiales Verschieben der Sauganzeige SA möglich wird. Die Membran MB ist in der Ausführungsform gemäß Fig. 6 nun mit der Spiralfeder SF vorgespannt, so dass auch entsprechend höhere Saugdruckwerte angezeigt werden können. Desweiteren kann die Sauganzeige SA auch dazu verwendet werden, durch rhythmisches Betätigen eine Pumpwirkung aufzubauen und dadurch manuell Saugdruck zu erzeugen. Dies könnte beispielsweise bei einer Inbetriebnahme der Wasserpumpe WP vorteilhaft sein. Voraussetzung dafür ist es, am Ende der Saugleitung ein Rückschlagventil einzubauen.Another embodiment of a suction indicator SA is in 6 shown in a cross-sectional view. The suction indicator SA is in turn connected to a membrane MB arranged on a receptacle AU, which is arranged underneath the filter cover FD, so that the suction indicator SA can penetrate the filter cover FD by axial displacement. However, in contrast to the previously described embodiment, the suction indicator SA has according to FIG figure 5 transverse to the axial direction of larger external dimensions, so that the suction indicator SA is not only in the form of a pin-shaped display element but in the form of an enlarged touch surface on the filter cover FD. On the opposite side of the diaphragm MB is the mount AU a spiral spring SF is provided, which is connected via a spring plate FE to the suction indicator SA or the membrane MB. The spring plate FE prevents the spiral spring SF from coming into contact with the membrane MB, which could possibly lead to damage or at least make assembly more difficult. The channel KA is in turn arranged inside the spiral spring SF, so that with a corresponding suction pressure, an axial displacement of the suction indicator SA is possible. The membrane MB is in accordance with the embodiment 6 now preloaded with the spiral spring SF, so that correspondingly higher suction pressure values can also be displayed. Furthermore, the suction indicator SA can also be used to build up a pumping effect through rhythmic actuation and thereby manually generate suction pressure. This could be advantageous, for example, when the water pump WP is started up. The prerequisite for this is to install a non-return valve at the end of the suction line.

In Fig. 7 ist nochmals eine Variation der soeben beschriebenen Ausführungsform gezeigt. Die Spiralfeder SF weist auf der der Membran MB gegenüberliegenden Seite ein Feststellmittel FM auf, so dass über ein Federteller FE' die Vorspannung der Spiralfeder SF durch axiales Verstellen des Verstellmittels FM eingestellt werden kann. Um die Funktion nicht zu beeinträchtigen, muss das Feststellmittel FM auch in axialer Richtung mit dem Kanal KA in Verbindung stehen. Somit ist es möglich, bei unterschiedlichen Installationshöhen der Wasserpumpe WP in Bezug auf den Wasserpegel des abzupumpenden Wassers eine Anpassung der Sauganzeige SA durch Verstellen des Verstellmittels FM durchzuführen. Das Federteller FE sowie das Federteller FE' dienen dabei wie oben erwähnt lediglich der mechanischen Schonung benachbarter Komponenten, insbesondere der Membran MB, wobei in anderen Ausführungsformen die Sauganzeige SA auch ohne Federteller FE bereitgestellt werden könnte.In 7 a variation of the embodiment just described is shown again. The spiral spring SF has a fixing means FM on the side opposite the membrane MB, so that the preload of the spiral spring SF can be adjusted via a spring plate FE' by axially adjusting the adjusting means FM. In order not to impair the function, the locking device FM must also be connected to the channel KA in the axial direction. It is thus possible to carry out an adaptation of the suction indicator SA by adjusting the adjusting means FM when the water pump WP is installed at different heights in relation to the water level of the water to be pumped out. As mentioned above, the spring plate FE and the spring plate FE' only serve to mechanically protect adjacent components, in particular the membrane MB, although in other embodiments the suction indicator SA could also be provided without the spring plate FE.

Das Feststellmittel FM könnte zusammen mit der Aufnahme AU auch über entsprechende Bereichsmarkierungen verfügen oder aber in diskreten und an der Aufnahme AU entsprechend gekennzeichneten Schritten einstellbar sein, so dass ein Nutzer den Funktionsbereich der Sauganzeige SA kontrolliert auf die entsprechende Installationshöhe der Wasserpumpe WP einstellen kann.The fixing means FM could also have corresponding area markings together with the mount AU, or it could be adjustable in discrete steps correspondingly marked on the mount AU, so that a user can set the functional area of the suction indicator SA to the appropriate installation height of the water pump WP in a controlled manner.

Unter Bezugnahme auf Fig. 8 ist nun eine dritte Ausführungsform einer federbehafteten Sauganzeige SA gezeigt. In dieser Ausführungsform ist die im Zusammenhang mit Fig. 6 beschriebene Sauganzeige SA so modifziert, dass diese in axialer Richtung hohlzylindrisch ausgeführt ist, so dass in das Innere der Sauganzeige SA eine weitere Sauganzeige SA' koaxial einführbar ist. Die weitere Sauganzeige SA' ist wiederum mit einer weiteren Membran MB' verbunden, die unterhalb der Aufnahme AU in einer weiteren Aufnahme AU' zu liegen kommt. Die weitere Membran MB' ist ebenfalls über eine Spiralfeder SF', die über ein Federteller FE' mit der weiteren Membran MB' in Verbindung steht, vorgespannt. Folglich ergibt sich eine zweifache Sauganzeige SA bzw. SA', wobei je nach Saugdruck nur eine oder beide Anzeigen aus dem Filterdeckel FD hervortreten.With reference to 8 a third embodiment of a spring-loaded suction indicator SA is now shown. In this embodiment, the related 6 Suction indicator SA described is modified in such a way that it is designed as a hollow cylinder in the axial direction, so that another suction indicator SA' can be inserted coaxially into the interior of the suction indicator SA. The further suction indicator SA' is in turn connected to a further membrane MB', which comes to lie below the receptacle AU in a further receptacle AU'. The additional membrane MB' is also prestressed via a spiral spring SF', which is connected to the additional membrane MB' via a spring plate FE'. As a result, there is a double suction indicator SA or SA′, with only one or both indicators protruding from the filter cover FD, depending on the suction pressure.

Eine derartige Ausführungsform kann beispielsweise dazu verwendet werden, zwei je nach gewünschter Installationshöhe der Wasserpumpe WP unterschiedliche Druckbereiche mittels der Sauganzeigen SA bzw. SA' darzustellen. So würde bei Installation der Wasserpumpe WP auf einer ersten niedrigeren Höhe nur die Sauganzeige SA in den Filterdeckel FD gezogen werden, da bei dieser Höhe der Druck in der Saugleitung noch nicht hoch genug wäre, um gegen die Spiralfeder SF' ein Absenken auch der Sauganzeige SA' zu bewirken. Bei einer zweiten größeren Höhe der Wasserpumpe WP in Bezug auf das abzupumpende Wasser ist der Druck dann groß genug, so dass zusätzlich auch die weitere Sauganzeige SA' in den Filterdeckel FD gezogen wird. Über die Federkonstanten der Spiralfedern SF bzw. SF' kann hierbei werksseitig eine Bereichsunterscheidung vorgenommen werden. Ein Feststellmittel FM, wie in Fig. 7 gezeigt, ist hier nicht erforderlich, könnte aber beispielsweise für die weitere Sauganzeige SA' vorgesehen werden, da diese von unten her durch eine Benutzerin oder einen Benutzer erreichbar wäre.Such an embodiment can be used, for example, to display two different pressure ranges, depending on the desired installation height of the water pump WP, by means of the suction indicators SA and SA′. If the water pump WP were installed at a first lower height, only the suction indicator SA would be drawn into the filter cover FD, since at this height the pressure in the suction line would not be high enough to prevent the suction indicator SA from lowering against the spiral spring SF'' to effect. At a second higher height of the water pump WP in relation to the water to be pumped out, the pressure is then high enough so that the additional suction indicator SA' is also drawn into the filter cover FD. About the spring constants of the spiral springs SF or SF', a range differentiation can be made at the factory. A means of determination FM, as in 7 shown, is not required here, but could be provided, for example, for the additional suction display SA', since this could be reached by a user from below.

Die Sauganzeige SA sowie die weitere Sauganzeige SA`, sofern vorhanden, gemäß den Ausführungsformen der Figuren 4 bis 8 ermöglichen das Vorliegen einer saugseitigen Leckage anzuzeigen, da dann die stiftförmigen Anzeigen nicht in den Filterdeckel FD gezogen werden können. Wie bereits eingangserwähnt, ist dies während der Inbetriebnahme insbesondere bei großen Installationshöhen vorteilhaft. Typischerweise kann die Installationshöhe bis zu 8 m betragen, wobei bei der zweiteiligen Sauganzeige gemäß Fig. 7 eine Aufteilung von bis zu 4 m für die erste Sauganzeige SA und ab 4 m für die zweite Sauganzeige SA' gewählt werden könnte.The suction indicator SA and the additional suction indicator SA`, if present, according to the embodiments of Figures 4 to 8 allow the presence of a suction-side leak to be indicated, since the pin-shaped indicators cannot then be pulled into the filter cover FD. As already mentioned, this is advantageous during commissioning, particularly in the case of large installation heights. Typically, the installation height can be up to 8m, with the two-part suction indicator according to 7 a division of up to 4 m for the first suction display SA and from 4 m for the second suction display SA' could be selected.

Um Zurücklaufen von Wasser in die Saugleitung SL zu verhindern, werden Wasserpumpen oftmals mit Rücklaufventilen ausgestattet. Da jedoch zu Beginn des Pumpvorgangs bei der Inbetriebnahme der Wasserpumpe WP ein Befüllen der Saugleitung SL mit Wasser erfolgen muss, werden derartige Rücklaufventile mechanisch gesperrt, so dass sie deaktiviert sind. Gemäß der Erfindung ist es vorgesehen, ein Rücklaufventil innerhalb der Filtereinheit FT anzubringen, die über den Filterdeckel FD gleichzeitig als Einfüllöffnung für das Einbringen von Förderflüssigkeit während der Inbetriebnahme fungiert. Daher wird die Filtereinheit FT zusammen mit dem Rücklaufventil entfernt, so dass keine derartige mechanische Betätigung durch eine Benutzerin oder einen Benutzer notwendig ist.In order to prevent water from running back into the suction line SL, water pumps are often equipped with return valves. However, since the suction line SL has to be filled with water at the beginning of the pumping process when the water pump WP is started up, such return valves are mechanically blocked so that they are deactivated. According to the invention, provision is made for installing a return valve within the filter unit FT, which at the same time functions as a filling opening for the introduction of pumped liquid during commissioning via the filter cover FD. Therefore, the filter unit FT is removed together with the return valve, so that no such mechanical operation by a user is necessary.

Eine weitere Ausführungsform verwendet dazu eine automatische Entlüftung, wobei wesentliche Elemente eines derartigen Rücklaufventils RV in der Querschnittsansicht gemäß Fig. 9 skizziert sind.A further embodiment uses automatic venting for this purpose, with essential elements of such a return valve RV in the cross-sectional view according to FIG 9 are sketched.

Das Rücklaufventil RV umfasst ein Ventilteller VT, das über einen Ventilschaft VS in eine Gehäuseplatte GP mündet. Die Gehäuseplatte GP ist am Gehäuse GE angeordnet. Das Ventilteller VT und der Ventilschaft VS sind druckseitig auf der Seite der Druckleitung DL angeordnet und können über einen Dichtring DR gegen die Saugseite der Saugleitung SL abgedichtet werden. Der Ventilschaft VS ist über eine entsprechende Spiralfeder SP vorgespannt, die sich gegen die Gehäuseplatte GP abstützt. Demnach kann aufgrund des Rücklaufventils RV kein Wasser aus der Druckleitung DL in die Saugleitung SL zurücklaufen.The return valve RV includes a valve plate VT, which opens into a housing plate GP via a valve stem VS. The housing plate GP is arranged on the housing GE. The valve disk VT and the valve stem VS are arranged on the pressure side on the side of the pressure line DL and can be sealed against the suction side of the suction line SL by a sealing ring DR. The valve stem VS is preloaded by a corresponding spiral spring SP, which is supported against the housing plate GP. Accordingly, because of the return valve RV, no water can flow back from the pressure line DL into the suction line SL.

Während des Befüllens ist jedoch die Pumpe drucklos, so dass über eine entsprechende Dichtscheibe DS abgedichtete Durchlasskanäle DK im Ventilteller VT, die zusätzlich von einer Sicherungsscheibe SS gehalten sind, offen liegen, so dass sowohl Wasser über die Durchlasskanäle DK in die Saugleitung SL gebracht werden kann, als auch Luft aus der Saugleitung SL über die Durchlasskanäle DK entweichen kann. Die Dichtscheibe DS ist dabei unmittelbar über den Durchlasskanälen DK auf der Seite der Druckleitung DL angeordnet und wird von der Sicherungsscheibe SS bedeckt.During filling, however, the pump is depressurized, so that passage channels DK sealed by a corresponding sealing disk DS in the valve plate VT, which are also held by a lock washer SS, are open, so that water can be brought into the suction line SL via the passage channels DK , and air can escape from the suction line SL via the passage channels DK. The sealing washer DS is arranged directly above the passage channels DK on the side of the pressure line DL and is covered by the locking washer SS.

Demnach wird ein Rücklaufventil RV geschaffen, das sowohl Zurücklaufen im Normalbetrieb verhindert als auch eine automatische Entlüftung während der Inbetriebnahme ermöglicht. Da die Verschiebung des Ventiltellers VT mit dem Vorhandensein von Ansaugdruck zusammenhängt, kann das Rücklaufventil RV auch um einen Schalter ST ergänzt werden, der zum Nachweis von Trockenlaufen bzw. Überhitzen genutzt werden kann. Dazu ist das Ventilteller VT mit einer Magnethalterung MH versehen, die einen Magneten MT aufnehmen kann. Außerhalb des Leitungsbereiches befindet sich der Schalter ST, der als REED-Schalter oder Hall-Sensor das Verschieben des Magneten MT detektieren kann und somit ein Signal an eine Steuereinrichtung weitergibt.Accordingly, a non-return valve RV is created which both prevents recirculation during normal operation and also enables automatic venting during start-up. Since the displacement of the valve disc VT is related to the presence of intake pressure, the return valve RV can also be supplemented with a switch ST, which can be used to detect dry running or overheating. The valve plate VT is also included provided with a magnet holder MH, which can hold a magnet MT. Outside the line area is the switch ST, which as a REED switch or Hall sensor can detect the displacement of the magnet MT and thus forwards a signal to a control device.

Die vorstehend und die in den Ansprüchen angegebenen sowie die den Abbildungen entnehmbaren Merkmale sind sowohl einzeln als auch in verschiedener Kombination vorteilhaft realisierbar.The features specified above and in the claims, as well as the features that can be inferred from the illustrations, can be advantageously implemented both individually and in various combinations.

Claims (17)

  1. Water pump, in particular a garden pump or a pump in an automatic domestic water system comprising a pump unit in a housing (GE) that can be driven by an electric motor and that can pump water as a conveyed liquid from a suction line (SL) to a pressure line (DL), wherein the housing (GE) comprises a pump housing (PG) and a housing extension (GF) adjoining the pump housing (PG) with the pressure line (DL) and the suction line (SL), wherein the housing extension (GF) comprises a filter unit (FT) as a termination, characterized in that an at least partially transparent window (FE) is arranged between the suction line (SL) and the pressure line (DL) in such a way that a liquid level (FL) can be read inside the housing (GE) prior to the operation of the pump (WP), and in that the filter unit (FT) comprises a suction indicator (SA) so that the presence of suction pressure in the pump housing (PG) or a leak in the suction line (SL) can be detected via the suction indicator (SA).
  2. Water pump according to claim 1, wherein the suction indicator (SA) exerts pressure on an indicator element arranged on a filter cap (FD) while liquid is being suctioned.
  3. Water pump according to claim 2, wherein pressure is exerted on the suction indicator (SA) via a membrane (MB), which is held by a holding fixture (AU) arranged on the side facing away from the filter cap (FD).
  4. Water pump according to claim 3, wherein the membrane (MB) can be submitted to a force with respect to the holding fixture (AU) by means of a springy-elastic element, in particular a spiral spring (SF) or a spiral spring (SF) adjustable with regard to its initial tension by means of a locking means (FM).
  5. Water pump according to one of the claims 1 to 4, in which a further suction indicator (SA'), arranged preferably coaxially to the suction indicator (SA), is provided, which indicates a higher suction pressure.
  6. Water pump according to one of the claims 1 to 5, wherein the at least partially transparent window (FE) is arranged on the pump housing (PG) or on the housing extension (GF), which is preferably cylindrical.
  7. Water pump according to claim 6, wherein the at least partially transparent window (FE) is part of the filter unit (FT) that is preferably functioning as a filling opening.
  8. Water pump according to claim 7, wherein the filter unit (FT) has side walls which are made at least in sections, preferably entirely, of an optically at least partially transparent material.
  9. Water pump according to one of the claims 1 to 8, wherein, alternatively or additionally, a liquid sensor is provided, which detects the liquid level in the region of the pump unit and displays it on the transparent window (FE).
  10. Water pump according to one of the claims 1 to 9, wherein a pressure sensor, which is connected to a control unit, is arranged on the pressure line (DL).
  11. Water pump according to one of the claims 1 to 10, wherein a return valve (RV) is provided which is part of the filter unit serving as a filling opening.
  12. Water pump according to one of the claims 1 to 11, wherein a return valve (RV) is provided that has an automatic air vent.
  13. Water pump according to claim 12, wherein the return valve (RV) comprises at least one passage channel (DK) which, when the return valve (RV) is closed, serves as an air vent during the filling of the suction line (SL) with the conveyed liquid, wherein the at least one passage channel (DK) can be sealed by a sealing ring (DR) when the pump unit is activated.
  14. Water pump according to claim 13, wherein the passage channel (DK) is arranged on a valve disc (VT) of the return valve (RV) and the sealing ring (DR) is arranged with an adjusting disc (SS) positioned above it so as to be displaceable under a spring preload along a valve rod (VS) of the return valve (RV) on the side of the pressure line (DL).
  15. Water pump according to one of the claims 12 to 14, wherein the return valve (RV) actuates a switch (ST) which, in the event of a dry run, sends a signal to a control device.
  16. Water pump according to claim 15, wherein the switch (ST) is a magnetic switch, in particular a REED switch or a Hall sensor, which can be actuated by means of a magnet arranged on the return valve.
  17. Water pump according to one of the claims 15 or 16, wherein the switch (ST) additionally or alternatively triggers a scalding protection.
EP17828693.6A 2016-12-20 2017-12-15 Water pump Active EP3559472B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16205526.3A EP3339649A1 (en) 2016-12-20 2016-12-20 Water pump
PCT/EP2017/082980 WO2018114646A1 (en) 2016-12-20 2017-12-15 Water pump

Publications (2)

Publication Number Publication Date
EP3559472A1 EP3559472A1 (en) 2019-10-30
EP3559472B1 true EP3559472B1 (en) 2023-03-01

Family

ID=57590358

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16205526.3A Withdrawn EP3339649A1 (en) 2016-12-20 2016-12-20 Water pump
EP17828693.6A Active EP3559472B1 (en) 2016-12-20 2017-12-15 Water pump

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16205526.3A Withdrawn EP3339649A1 (en) 2016-12-20 2016-12-20 Water pump

Country Status (10)

Country Link
US (1) US11118589B2 (en)
EP (2) EP3339649A1 (en)
CN (1) CN110226043B (en)
AU (1) AU2017381473B2 (en)
CA (1) CA3042337A1 (en)
CL (1) CL2019001186A1 (en)
ES (1) ES2944335T3 (en)
FI (1) FI3559472T3 (en)
PT (1) PT3559472T (en)
WO (1) WO2018114646A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3862570A1 (en) * 2020-02-06 2021-08-11 Husqvarna Ab Garden pump with thermosensitive liner
TWI738327B (en) * 2020-05-11 2021-09-01 日益電機股份有限公司 Canned magnetic pump with reinforced leak-proof cover with back cover
CN113202786B (en) * 2021-06-03 2022-02-11 浙江尔格科技股份有限公司 Oil-submersible pump turns to discernment structure

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ES1019424Y (en) * 1991-11-13 1992-10-16 Doll, S.A. PRE-FILTER FOR POOL FACILITIES.
DE10060998C1 (en) * 2000-12-08 2001-10-31 Braun Gmbh Valve for food storage container has opening tab with suction aperture and smooth edging for sealing lip of suction connector of vacuum pump
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US8480373B2 (en) * 2004-08-26 2013-07-09 Pentair Water Pool And Spa, Inc. Filter loading
DE102005007265A1 (en) * 2004-09-21 2006-04-06 Micro-Epsilon Messtechnik Gmbh & Co Kg Device and method for detecting the position and the speed of a measuring object
US20060083630A1 (en) * 2004-10-19 2006-04-20 Yuan-Chen Chen Pump
CN2809277Y (en) * 2005-02-01 2006-08-23 上海阿波罗机械制造有限公司 Automatic monitoring device for non-seal self-priming pump
DE102006023379B4 (en) * 2006-05-17 2013-10-02 Al-Ko Kober Ag liquid pump
CA2685787A1 (en) * 2008-11-18 2010-05-18 William J. Lund System and method for on demand hot water distribution
DE102010026474A1 (en) 2010-07-07 2012-01-12 Gardena Manufacturing Gmbh Garden pump assembly for crop irrigation via e.g. shower, has control element operated for switching on drive motor after shutdown and based on output pressure of pump, where control element is provided without pressure sensor
DE102013106970A1 (en) 2013-07-03 2015-01-22 Leo Gruppe Gmbh Garden pump with improved suction behavior
DE202015003085U1 (en) * 2015-04-29 2016-08-03 Speck Pumpen Verkaufsgesellschaft Gmbh Strainer for pump with illuminated filter unit

Also Published As

Publication number Publication date
EP3339649A1 (en) 2018-06-27
ES2944335T3 (en) 2023-06-20
CN110226043B (en) 2021-11-16
CL2019001186A1 (en) 2019-09-27
EP3559472A1 (en) 2019-10-30
FI3559472T3 (en) 2023-05-09
US11118589B2 (en) 2021-09-14
PT3559472T (en) 2023-05-22
AU2017381473B2 (en) 2023-09-21
CN110226043A (en) 2019-09-10
US20190257313A1 (en) 2019-08-22
WO2018114646A1 (en) 2018-06-28
CA3042337A1 (en) 2018-06-28
AU2017381473A1 (en) 2019-05-30

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