EP0992687A2 - Valve operated discharge control of a household pump - Google Patents

Abstract

The unit has a pump with pump chamber and a back pressure valve (26) located downstream of the pump chamber outlet. The valve has a housing (40) with removeable valve insert (49). The housing has a valve intake (42) and a valve outlet (43), which are formed like connection sockets of a pipe connection. The valve unit is a one-part module, which can be removed from the pump and replaced by a pipe section of corresponding dimensions. The valve intake is formed by a plug socket, fitted into the pump outlet and/or is formed as a threaded socket.

Description

The invention relates to a liquid pump arrangement, in particular for use in the home and / or garden, according to the preamble of claim 1.

Constantly increasing water fees and an improved environmental awareness cause more and more house and / or garden owners to to install dual water use systems and so alternatively or in addition to drinking water, rainwater too use. This can be used to promote the water from collection points such as ponds, cisterns or the like different to consumers Liquid pump arrangements are used for example submersible pumps, garden pumps, fountain pumps or the like Especially in permanently installed rain use systems domestic waterworks are also used, for example collected rainwater from an appropriate reservoir through a pipe system separate from the drinking water pipe system to rainwater consumers such as toilets, washing machines, Showers or the like to promote.

Important criteria for choosing one for each The use of a suitable pump is in addition to economy, durability, Corrosion resistance and smoothness above all the ease of maintenance, for example cleaning work Carry out easily to remove impurities to be able to.

The invention is based, above all in propose improved liquid pump arrangement in this regard.

This object is achieved by a liquid pump arrangement with the features of claim 1. Advantageous further developments are specified in the dependent claims, the Wording made by reference to the content of the description becomes.

A liquid pump arrangement according to the invention has one preferably liquid pump driven by an electric motor with at least one to a pump chamber of the liquid pump leading pump inlet through which liquid can be sucked or can be introduced, and at least one of the pump chamber Purging pump outlet for delivery of under pressure standing liquid. According to the invention is the downstream Pump output arranged a check valve unit, the a housing and a valve insert removable from the housing Has. This creates the possibility, possibly all maintenance, especially cleaning and / or a malfunction components exposed to calcification or constipation to remove and this outside the liquid pump arrangement to clean or if necessary individually or in groups exchange. It is particularly advantageous that the removal is possible without the cable routing between the pump outlet and a downstream pressure line must, since the flow-through housing with the liquid pump arrangement can stay connected.

In one embodiment, the valve insert is removed in a few simple steps without the use of tools, So possible without tools, which makes this intervention quick and easy can be carried out easily if required.

Although it is possible, the housing of the check valve unit integral with the liquid pump assembly, for example in one piece with a housing of the liquid pump arrangement training, it is preferably a separate one Component. In a preferred embodiment, this has Housing a valve inlet and a valve outlet, the designed in the manner of connecting pieces of a line connection are. This makes it possible to use the check valve unit as a whole, including the housing, of the Remove liquid pump assembly and through a line piece with corresponding similar or identical connection dimensions to replace. For use cases where a Check valve is not required, it can be the same Pump type also with a standard pipe section instead of the Check valve unit be equipped. It is also possible, the flow-through housing of the check valve unit without a valve insert as a flowable pipe section to use.

In embodiments with a check valve unit which can be removed as a whole is a removable check valve also created when the check valve unit itself has no removable valve insert. So there are several Possibilities of a generic liquid pump arrangement with a removable after the pump outlet To design check valve.

In a preferred embodiment, the check valve unit forms an angular connection between a valve inlet and a valve outlet of the housing by the valve outlet at an angle, preferably a right angle, is aligned to the valve inlet. This angular connection enables a particularly compact construction of the liquid pump arrangement and creates a convenient removal option for the valve insert. The housing of the Check valve unit in addition to the valve inlet and the valve outlet a removal opening for the valve insert have, preferably in extension of one of the connections, in particular the valve inlet is arranged. This will the valve insert e.g. in extension of the inflow direction removable. The removal opening can preferably be through a manually operable closure member, especially one Screw cap, can be closed liquid-tight.

The check valve can take many suitable configurations. In particular, a valve seat on one can be suitable molded portion of the housing. At a preferred embodiment, the valve insert has a Removable valve seat element. This will make the Valve seat surface good after removing the valve seat element accessible and can be cleaned easily and thoroughly, without any intervention with cleaning tools inside of the housing is necessary.

Preferably, a tool-free, in the assembled state of the check valve unit in Housing provided movable valve body, the preferably at least one interchangeable, rubber-elastic Sealing element for interaction with the valve seat. This also makes it convenient and particularly thorough Cleaning promoted.

In a preferred embodiment, the check valve designed so that the flow cross-section at continuous Movement of the valve body between the sealing position and fully open position after an initial phase small flow cross section increases suddenly. For this purpose, the valve body downstream of a sealing engagement with the sealing area provided for the valve dimensions a downstream of the valve seat Guide channel, which may be provided on the valve seat element can be adapted so that with little withdrawal of the Valve body from the valve seat between the valve body and the guide channel is a narrow one, for example an annular channel Leakage current channel is formed, which is only a short Adjustment path formed from the shut-off position of the valve body is. This makes it possible for a low pressure drop in the outlet pressure line, for example through a low leakage through the liquid leakage channel is tracked without the check valve already in its full open position is blocked. This is particularly so important if a sensor is provided that the open position of the check valve is detected, for example the pump according to the sensor signal control, especially switch on or off. By the Leakage current channel becomes a quiet operation of the pump with few Switching operations possible.

In a preferred embodiment, the downstream of the Pump output at least one for emitting a flow signal trained flow sensor unit arranged, the Signal can be used for example to control the pump can. The flow sensor unit can be of any suitable design have, for example with one arranged in the flow path Water wheel. You can at any suitable location, for example behind the check valve unit or just before an outlet of a pressure line downstream of the pump outlet be provided. Preferably, the check valve unit an integrated flow sensor unit, preferably a magnetic element movable with the valve body and one arranged along the adjustment path of the valve body magnetic field sensitive sensor, in particular a Hall sensor. The arrangement can be in one embodiment with leakage current channel should be such that up to a possibly specifiable maximum leakage current rate no flow signal is delivered to frequent switching operations of the To avoid pump. An integration of a flow sensor in the check valve unit has the advantage, among other things, that the actuating movement of the valve body for the detection of Flow can be used so that separate elements in the flow path, such as water wheels or the like, can be avoided can.

In one embodiment of the invention, the Pump output at least one preferably manually operable Drain valve to connect the pump outlet downstream pressure line provided with the pump chamber, this connection preferably being switched off Pump can be manufactured. This makes it possible to empty it of a line system connected to the pump on the pressure side through the pump chamber, the drained liquid, for example, via a Drain valve of the liquid pump arrangement and / or over a suction line connected on the suction side can take place. The check valve unit is particularly advantageous for this formed as a drain valve, so that a separately to be provided Drain valve is not necessary. This functional extension the check valve unit is at one Embodiment created in that the check valve unit a preferably manually operable, in particular rotatable control element for lifting the valve body from the valve seat has, this withdrawal only from the Position of the control unit and not on the input side and depends on the pressure conditions present on the output side. The possibility of actuating the valve body independently of the pressure ratios can also be used to Start pump start by venting the inside of the pump through the open check valve perform so that the check valve unit also can take over the function of a vent valve.

These and other features go beyond the claims also from the description and the drawings, wherein the individual characteristics individually or in groups in the form of sub-combinations in one embodiment of the invention and in other fields can.

Fig. 1

eine schrägperspektivische Ansicht einer Ausführungsform einer erfindungsgemäßen Flüssigkeitspumpe,

Fig. 2

einen teilweisen vertikalen Längsschnitt durch eine andere Ausführungsform einer Flüssigkeitspumpe ähnlich Fig. 1,

Fig. 3

einen Schnitt durch einen entnehmbaren Filterstutzen der Ausführungsform gemäß Fig. 2,

Fig. 4

einen Längsschnitt durch eine entnehmbare Rückschlagventileinheit der Ausführungsform gemäß Fig. 2,

Fig. 5

einen Längsschnitt durch die in Fig. 4 gezeigte Rückschlagventileinheit in einer uni 90° versetzten Schnittebene,

Fig. 6

einen Schnitt durch eine entnehmbare Druckschaltereinheit der Ausführungsform nach Fig. 2,

Fig. 7

einen Schnitt durch einen als Handgriff dienenden Druckstutzen der Ausführungsform nach Fig. 2 und

Fig. 8

einen Schnitt durch das Ablaßventil der in Fig. 2 gezeigten Ausführungsform.

An embodiment of the invention is shown in the drawings and is explained in more detail below. The drawings show:

Fig. 1

2 shows an oblique perspective view of an embodiment of a liquid pump according to the invention,

Fig. 2

2 shows a partial vertical longitudinal section through another embodiment of a liquid pump similar to FIG. 1,

Fig. 3

3 shows a section through a removable filter connection of the embodiment according to FIG. 2,

Fig. 4

3 shows a longitudinal section through a removable check valve unit of the embodiment according to FIG. 2,

Fig. 5

3 shows a longitudinal section through the check valve unit shown in FIG. 4 in a section plane offset by 90 °,

Fig. 6

3 shows a section through a removable pressure switch unit of the embodiment according to FIG. 2,

Fig. 7

a section through a serving as a handle pressure port of the embodiment of FIGS. 2 and

Fig. 8

a section through the drain valve of the embodiment shown in Fig. 2.

Figures 1 and 2 are overall views of substantially Identical embodiments of a liquid pump arrangement 1, which is shown in particular for applications in Home and garden is provided and preferably as a pump a domestic waterworks can be used. It has a largely housing 2 made of stable, impact-resistant plastic, on the underside there are recesses for three feet 3 are. You define a standing level of the pump and pass preferably essentially rubber-like soft Material, for example made of a soft thermoplastic. The Feet enable a soundproof, stable stand Installation of the pump. In the housing is an electric motor operated, air-cooled by means of a fan 4 Integrated liquid pump 5, the pump impeller 6 around the one parallel to the stand level, usually horizontally aligned Pump axis 7 rotates within a pump chamber 8. The pump chamber 8 is formed by a substantially dome-shaped Chamber housing 9 limits that in the shown in Fig. 2 Embodiment made of the same plastic material how the housing is, in other embodiments Increasing the compressive strength also from metal, for example stainless steel. At the top of the chamber housing are parallel to each other and perpendicular to the pump axis 7, a leading into the chamber 8, rounder in cross section Pump inlet 10 and a leading from the chamber 8, in cross section Round pump outlet 11 arranged. In the floor area of the chamber housing or in a connected to the pump chamber Base (Fig. 1) is a horizontal, to the pump axis 7 parallel nozzle 12 with an internal thread for receiving a screw-in drain valve 13 is provided.

On the suction side of the pump is a related Fig. 3 described in more detail in the provided with internal thread Pump inlet screw-in filter connector 15 is provided. On this, which can also be designated as an inlet connection, replaceable Plastic component is an upper, in the axial extension the pump inlet and the level of the pump above of the upper end of all pump chambers, circular fill opening 16 is provided, for example liquid into the pump chamber before starting the pump can be filled. The inlet opening is through a screw cap 17 provided with a seal can be closed. The diameter of the filling opening 16 is advantageous chosen so large that a in the filter socket 15th Dirt sieve 18 that can be inserted from above and has a conical section shape with U-shaped handle from above through the filler opening inserted in the filter socket or removed upwards can be. When the filter or sieve 18 is inserted outward edge at the upper end of the sieve body on an inner shoulder of the filter socket and the inside of the screw cap 17 presses lightly on the bracket 19, so that the filter insert 18 is clamped wobble-free. Advantageously is also an inlet opening 20 on the suction side for drawing in liquid above the upper edge of the pump chamber and above or upstream of the strainer 18 arranged. The inlet opening 20 is through one at the top End region of the filter connector 15 projecting horizontally, with externally threaded connector 21 formed, the horizontal Axis with the filter socket fully screwed in runs essentially parallel to the pump axis 7. By the advantageous arrangement of the suction opening and the suction inlet opening on the suction side in front of one Dirt filter device 18 can reliably inside the pump against penetrating particles, such as dirt particles, Pieces of wood or the like to be protected. The filter 18 is after Unscrew the lid 17 for easy removal. The fact that the filter socket with inlet opening and filling opening and integrated filter device by unscrewing Easily removable from the pump inlet and correspondingly light the pump can be replaced in this area Screw in a differently dimensioned filter socket can be modified in a simple manner with respect to the dimensions, for example to adapt to specially dimensioned To allow supply lines. It is a complete one Removable or replaceable input filter module created.

On the outlet side or pressure side of the pump are in the Pump outlet 11 downstream pressure line 25 more advantageous functional modules in the form of interchangeable modules, i.e. in the form of assemblies that one or more in take on essentially self-contained functions, provided. In the embodiment shown is located directly or immediately downstream of the pump outlet 11 explained in connection with Figures 4 and 5 in detail Check valve unit 26 and, this immediately downstream, one explained in connection with FIG. 6 Pressure switch unit 27, both advantageous in the housing shape are integrated. The check valve unit 26 forms an angular connection enclosing an angle of 90 ° between the upwardly discharging pump outlet 11 and the horizontal direction of the pressure line leading to the side 25. Between a side outlet port of the check valve unit 26 and the entrance of a serving as a handle Pressure port 28 is with a transition port Pressure switch unit 27 inserted, the functional elements the pressure switch on the side next to that in the pressure line extending liquid flow are arranged. The pressure switch unit is advantageously in the liquid flow formed by the check valve to the pressure line Angle inserted in a particularly space-saving manner.

Downstream of the pressure switch unit 27 is related with Fig. 7 explained in more detail than rigid or rigid Tube designed pressure pipe 28 is provided, the sections free to form a handle opening 29 runs above the housing 2 parallel to the pump axis 7. The free-floating section lies approximately above the center of mass the overall pump arrangement and can be used as a handle serve for the pump arrangement. Following this flowable handle 30 is in the course of the leading Pressure line provided a hinge connection 31, the one radial to the pressure line axis leading through the handle 32 aligned side output port 33. Another output terminal 34, separate from this, is located in extension of the handle 30 on the axis 32 and is aligned with the inlet opening 20 on the suction side in the example. The structure of these various functional units is described in following together with the respectively achievable functions and Advantages described in more detail.

The embodiment which can be seen particularly well in FIGS. 4 and 5 the check valve unit 26 has a substantially cylindrical plastic housing 40, at the bottom End forming a radial shoulder as a valve inlet serving inlet connector 42 with a plurality of circumferential grooves are provided for receiving round cord seals. On serving as valve outlet outlet connector 43 with external thread and circumferential groove for receiving a round cord seal protrudes in the upper region of the housing 40 at an angle of 90 ° to the inlet port from the housing 40. Above the outlet nozzle is another housing opening on the housing that is open at the top 41 with an internal thread section for receiving a screw cap 44 is provided. In the housing section between Inlet port and outlet port is one in FIG. 5 easily recognizable, offset by 90 ° compared to the outlet nozzle, through opening through the housing opening 45 for a manually operated rotating device described below Control member 46 is provided above the transverse opening 45 is at the level of the outlet nozzle 43, offset by 90 ° this, a housing wall recess for receiving a magnetic field sensitive Sensor 47, for example a Hall sensor, educated.

Inside the housing 40 is a completely removable Valve insert 49 arranged. This includes a valve seat element 50, which is one of the cylindrical inner contour of the upper area of the valve housing adapted cylindrical outer contour with two axially offset circumferential grooves, of which the upper to hold one of the seals against the inner wall of the housing serving cord seal 51 and the lower one for insertion of locking pins that can be inserted radially through the housing wall 52 serves. The valve seat member 50 is installed Condition on an inward facing shoulder of the Housing wall above the transverse opening 45 and is through the pins 52 secured against falling out. One at the bottom End of a cylindrical guide opening 53 of the valve seat element provided inward shoulder 54 serves as the valve seat of the check valve.

One that interacts with the valve seat as a shut-off element serving spring-loaded, self-resetting valve body 55 has an internally hollow, cylindrical shaft 56, which on the side facing the valve seat below a web 57 a receiving groove for a cooperating with the valve seat 54 elastic cord seal 58 has. On the shaft 56 is a radial, on the side facing the magnetic field sensor 47 cylindrical receptacle designed for a permanent magnet 48, the one with the valve closed below the magnetic field sensor and arranged outside of its effective range is. Between the circumferential collar 57 of the valve body and the cylindrical guide opening 53 of the valve seat element there remains a small gap with slight lifting of the sealing ring 58 from the valve seat serve as a leakage flow channel can. This only for a line with low leakage currents provided ring channel is only over a short displacement of the valve body from the shut-off function. Once the all-round collar in the area above the valve seat element 50 is lifted off, there is a significantly larger flow cross-section between the inlet and outlet of the valve Available.

A conical tip 59 of the valve body protrudes when closed Valve (Fig. 4 and 5) through the central circular opening of the valve seat element in the area of the control member 46. At the opposite, open end of the valve body is a plate widening conically upwards, the among other things the support of a conically wound compression spring serves, whose opposite, wider end is at concave inward curved head portion 61 of the screw cap 44 supports. The one with an external thread and one arranged within the front concave recess Handle bar 62 provided screw cap has on the inside an axially extending guide element 63 with a cruciform Cross section that is essentially free of play in the cylindrical interior of the valve body is insertable and the axially sliding guidance of the valve body is used.

The multi-part control element which can be inserted into the transverse opening 45 46 has an inside of the valve housing below the Opening of the valve seat element can be arranged and flowed through Ball element 65 on which one about the axis of rotation of the control member V-shaped cam contour 66 running around is provided with the conical tip 59 of the valve body interacts for axial displacement of the valve body. The cam contour is designed so that in the no release position shown in Figures 2, 4 and 5 There is contact between the ball element and the valve body, so that the compression spring 60 seals the valve body presses on the valve seat while turning the Control member, for example, through 120 ° of the valve body the cam contour against the force of the compression spring from the valve seat is lifted off so that a flow path from the inlet port 42 through the ball element and the valve seat area to the outlet port 43 or vice versa. Hereby is an opening of the valve independent of that between the Connections available pressure conditions possible, in particular even if 43 the pressure is higher than in the area of the inlet connection 42. The check valve effect is thus by actuation of the control member 46 can be canceled.

The valve insert 49 is a complete assembly if necessary Unscrew the cover 44, with the switching cover 44 and the valve body guided and carried by it normally stay connected and the valve seat element may also remain in the housing 40. Particularly advantageous affects the angular version of the check valve device from which a removal of the valve insert in Continuation of the direction of the incoming fluid allows.

This means that the valve insert can be installed with a check valve device can be removed without the rest Structure of the pump assembly is affected, in particular also without having to remove other components. The control member 46 is also due to its multi-part structure removable.

Thanks to the control member 46, the embodiment shown is the Check valve unit at the same time as drain valve educated. For example, at the start of pump operation by opening the valve in the suction area if necessary and / or air in the pump chamber is first removed be before the pure liquid pumping operation is recorded. Because of the compressibility of air can without this option at the start of pump operation Functional impairments result. In normal operation the pump, on the other hand, disengages the control element with the valve body so that it can only be inlet pressure can be moved in the open position.

Furthermore, it is by means of manual opening of the valve Control device 46 possible, with the pump switched off a connected Line system through the check valve device for example through the open drain valve or to empty through the intake manifold, so that the valve unit also forms a drain valve.

The embodiment of the check valve unit shown also acts as a flow sensor, one by one Pump control easily processable electrical Flow signal delivers. For this, the shift of the Valve body 55 detected by the magnetic field sensor 47, as soon as the permanent magnet 48 is in the effective range of the sensor 47 is moved. The embodiment shown is so designed that with little displacement of the valve body due to the effect of a low leakage current of the permanent magnet is not yet detected by the sensor. Only with stronger ones Displacement of the valve body, its dimension from the current one Liquid flow depends, there is the permanent magnet in the detection area of the magnetic field sensor and delivers of the amount of liquid let through per unit of time dependent flow signal. The advantageous training at the low leakage currents do not generate a flow signal This is particularly important if the pump is made to measure the sensor signal of the flow sensor is controlled, in particular to switch the pump on or off. These switching operations are accordingly not caused by low leakage currents effected, but only through substantial withdrawals on the print page.

A flow sensor can also use another principle work, for example by means of a liquid flow arranged rotating water wheel, the rotation of which e.g. is monitored mechanically, electrically or magnetically or with other electrical, electromagnetic, magnetic or optical means. Alternatively or in addition to one flow sensor integrated in the check valve unit a flow sensor can also be used elsewhere in the laxative Pressure line, for example immediately before the outlet connections or provided on the inlet side of the pump his.

The described embodiment of the check valve unit thus combines at least four functions by: in addition to the function as a check valve, also a function as a drain valve, as a vent valve and as a flow sensor provides. These functions can be used by others Embodiments also through separate components or Modules and / or elsewhere in the field of laxative Pressure line may be provided.

In the pressure switch unit, which can be seen particularly well in FIG. 6 27, a transition piece 70 is provided, which according to Kind of a connecting pipe sleeve is formed and on both axial ends 71, 72 with internally threaded receiving openings for screwing in pipe pieces or the like. having. The Functional elements of the pressure switch are on the side next to the between the ends 71, 72 extending liquid flow or formed in one piece with the transition piece 70 Pressure switch housing 73 housed. One in cross section small radial channel 74 connects the inside of the nozzle 70 with the interior of the housing 73 and is by a flexible membrane 75 closed liquid-tight. On the side of the membrane 75 facing away from the channel is supported within the housing 73 axially movably mounted switch body 76, which is connected to the Membrane is pressed. This is supported by a set screw 77 from the setting of the spring pressure on the Body 76 serves and within a housing 73 outside closing screw cover 78 is guided. The switch body 76 acts via an articulated switch lever 79 which is guided outwards through a recess in the housing wall, to an electrical switch attached to the outside of the housing 80, which is one of the fluid pressure within the nozzle 70 dependent, further processable by a pump control Emits pressure signal. Instead of the electromechanical switch other pressure switches are also possible. A pressure switch unit can also be firmly connected to the pump housing and be structurally integrated into it. If a pressure switch unit not or not at the example shown in Fig. 2 position is required, the pressure switch module can be replaced by a simple connecting pipe sleeve.

The one downstream of the pressure switch unit 27, in FIG. 7 pressure connection 28, which is particularly easy to recognize, forms at the same time the handle or handle 30 of the pump assembly and can improve grip at least in the grip Area of an outer contour that improves grip for example with longitudinal grooves or the like. (Fig. 1) have.

The swivel joint 31 arranged in the exit area has a sleeve with a lateral or radial connection 33, the infinitely and infinitely around the pressure line axis 32 is rotatably mounted and with round cord seals 85 is sealed. Via slot-shaped wall openings 86 in Pressure pipe can water from the axial direction Pressure line laterally to the radial outlet 33 of the Exit swivel 31. Both the side exit 33 of the Swivel joint as well as in the direction of that lying in axis 32 Front outlet 34 of the pressure line are, preferably separately, lockable, for example by screwing on a screw cap. Common connectors, in particular screwed on tap pieces with quick coupling nipples become. On the one hand, the swivel joint offers the possibility a second consumer to the pump without a separate one To connect branching piece. In addition, through the unlimited and continuous rotation of the swivel second connection 33 in different, for the respective use optimal directions are rotated. For a position of the swivel joint with unused second output 33 is in shown example, a U-shaped housing recess 87 is provided, in which the side connector 33 can be rotated. This is preferably sized so that it, for example also a connector screwed onto the connector can record with water stop.

In the embodiment shown, it is also advantageous the opposite, axially parallel orientation of the suction connection 20 at the pump inlet and the axial outlet 34 of the leading pressure line at the pump outlet, which make it possible the liquid pump 1 in an otherwise straight line Install the pipe run.

An advantageous use of a pump arrangement with at least Two separate pump outlet connections can also be made in it can be seen that at an exit, especially in Output 34 lying along the longitudinal axis, e.g. pneumatic Pressure accumulator can be connected, in particular for the mode of operation the pump as a domestic waterworks or in a comparable one Operating mode can be advantageous, for example to cause buffering.

The modular structure with separately functioning and Units that can be installed or removed individually or in groups offers as a special advantage that instead of building units simple line elements can also be used can. For example, for applications where a Check valve and / or a pressure switch is not required the component that is not required by a simple Pipe element with identical installation dimensions replaced become. For example, the embodiment shown in FIG. 2 be completed by the check valve unit 26 through a 90 ° elbow and the pressure switch unit 27 is replaced by a connecting pipe sleeve. If only one pump outlet is required, for example also the pressure port 28 without swivel connection 31 his. A connection can be made with a domestic water supply network can be connected and to the others a drain valve connected via which the line network, e.g. for maintenance work that can be emptied without to disconnect from the pump and without the pump self-draining, which is usually manual venting the pump is required before restarting.

The embodiment shown in Fig. 2 has a laterally on Motor part of the pump fixed pump switch 90. At Another embodiment is a contact field in this area provided with a removable switching device mechanically attached to the pump and at the same time can be electrically connected to this. In particular the pump, in addition or as an alternative to an operating mode switch a timer can be assigned, for example is attachable to the pump. On possibly existing pressure switch and / or an existing one Sensor for the flow status of the check valve can be connected to the switch or timer.

The signals from the pressure switch device and / or the check valve can advantageously for pump control, especially used to switch the pump on and off become. Additionally or alternatively, a A time program can be specified. Another advantageous control option, especially when used a pump arrangement of the type mentioned in the garden to see that with the help of a pressure switch unit Pump when reaching a pressure close to that without consumer withdrawal maximum achievable maximum pressure switched off with a restart advantageously only when the pressure has dropped sharply and / or when Larger flow rates through an existing check valve he follows.

When switching on a consumer, e.g. a garden sprayer, of a sprinkler, a spray gun or the like, the pressure drops immediately and the pump switches on. During operation of the pump and the activated consumer, the pressure remains below the threshold. Only after switching off the consumer the pressure rises very quickly above the switching threshold on and the pump switches off. Such a pressure control arrangement can be particularly simple, inexpensive and not very sensitive be carried out, since usually the existing low Switching hysteresis preferably used pressure switch as well as the time delay in the shutdown for such a pressure-controlled operation of the liquid pump is sufficient. As mentioned, it is also possible to have a small print buffer and / or a pressure switch with two explicit, spaced switching thresholds for generation to use a larger hysteresis.

The control options for the pump are advantageous for a pump with integrated Control device possible, which is preferably programmable can be. By directly in the structure of the pump arrangement integrated control device, for example as Attachment to the pump housing can be omitted the need for controls via a separate feed line or for example by inserting a control device into the power supply line, e.g. a timer or the like. The control device can be an electrical Sub-unit or as a control module also from the pump arrangement be detachable, so that depending on the intended application various, specially designed control units are also provided can be or, with unchanged pump construction also a variant with a conventional switch instead a more complex control device is possible. The control device can in particular with removable design via plug contacts on a permanently connected to the pump arrangement Contact field can be plugged on.

The preferably tool-free removability of the control device from the pump can also be advantageous for programming the control unit either via a portable Programming device or via a possibly far away from the Pump provided programming device, for example a Computer, be cheap. A control device of this type can perform different functions individually or in combination included, for example a wireless controller, e.g. about Radio, a control according to a specified time and / or a Control according to at least one sensor signal. This can be done independently of the pump, for example a precipitation sensor or soil moisture sensor is provided be, and / or by at least one the operating state the pump indicating sensor, for example a Pump outlet pressure sensor or switch and / or one Flow sensor.

Claims (18)

Liquid pump arrangement, especially for use in the house and / or garden, with a liquid pump (5) with at least one to a pump chamber (8) the liquid inlet leading pump inlet (10) and at least one pump outlet leading away from the pump chamber (11), characterized by a downstream of the pump outlet (11) arranged check valve unit (26) with a housing (40) and one from the housing removable valve insert (49). Liquid pump arrangement according to claim 1, characterized in that the housing (40) enters a valve (42) and a valve outlet (43), which according to Art formed by connecting pieces of a line connection are. Liquid pump arrangement according to claim 1 or 2, characterized characterized that the check valve unit (26) can be removed as a whole from the liquid pump arrangement and preferably with a line piece appropriate connection dimensions can be replaced. Liquid pump arrangement according to one of the preceding Claims, characterized in that the check valve unit (26) a valve inlet (42) and has a valve outlet (43) which is at an angle, preferably at a right angle to the valve inlet (42) is aligned. Liquid pump arrangement according to one of claims 2 to 4, characterized in that the valve inlet than pluggable sealed in the pump outlet (11) Plug connector is formed and / or that the valve outlet (43) is designed as a threaded connector. Liquid pump arrangement according to one of the preceding Claims, characterized in that the housing (40) the check valve unit in addition to one Valve inlet (42) and a valve outlet (43) one Has removal opening (41) for the valve insert (49), the removal opening preferably being an extension the valve inlet (42) is arranged, preferably a preferably manually operable closure member is provided for the removal opening (41), in particular a sealed screw-on or screw-in type Screw cap (44). Liquid pump arrangement according to one of the preceding Claims, characterized in that the check valve unit (26) a removable from the housing (40) Has valve seat element (50) on which a Valve seat (54) of the check valve unit is formed is. Liquid pump arrangement according to one of the preceding Claims, characterized in that the valve insert (49) a removable, inside the housing (40) comprises movable valve body (55), preferably at least one interchangeable, rubber-elastic Sealing element (58) for cooperation with the Valve seat (54) carries. Liquid pump arrangement according to one of the preceding Claims, characterized in that a valve body (55) the valve insert upstream one to Sealing engagement provided with the valve seat (54) Sealing area the dimensions of a downstream of the Valve seat arranged guide channel (53) for the Valve body is adjusted so that with little lifting the valve body from the valve seat between the Valve body and the guide channel a narrow leakage current channel is formed while with larger withdrawal of the valve body suddenly a several times larger Flow cross-section can be released. Liquid pump arrangement according to one of the preceding Claims, characterized in that downstream of the pump outlet (11) at least one for delivering a Flow signal trained flow sensor unit (47, 48) is arranged. Liquid pump arrangement according to one of the preceding Claims, characterized in that the check valve unit (26) an integrated flow sensor unit has, which preferably with the valve body (55) movable magnetic element (48) and at least one along the adjustment path of the valve body arranged magnetic field sensitive sensor (47), in particular has a Hall sensor, preferably the Flow sensor unit is designed such that no flow signal below a maximum leakage current rate is delivered. Liquid pump arrangement according to one of the preceding Claims, characterized in that downstream the pump outlet (11) preferably at least one manually operated drain valve (26) for connection a pressure line downstream of the pump outlet (25) with the pump chamber (8), in particular at switched off pump, is provided. Liquid pump arrangement according to one of the preceding Claims, characterized in that the check valve unit (26) as preferably manually operable Drain valve is formed. Liquid pump arrangement according to one of the preceding Claims, characterized in that the check valve unit (26) a preferably manually operable, in particular rotatable control member (46) for Lifting the valve body (55) from the valve seat (54) having. Liquid pump arrangement according to one of the preceding Claims, characterized in that they are upstream an inlet opening (20) of the pump inlet (10), and preferably one separate from the inlet opening Filling opening (16), wherein the inlet opening (20) and preferably the filling opening, based on a footprint of the liquid pump arrangement above the pump chamber (8) is arranged, preferably between the inlet opening (20) and / or the filling opening and the pump inlet (10) preferably one interchangeable filter device (18) is arranged. Liquid pump arrangement according to one of the preceding Claims, characterized in that a downstream of the pump outlet (11) arranged line section a pressure line (25) as a rigid tube is designed to form a handle (30) self-supporting in sections. Check valve unit, especially for installation downstream a pump outlet of a liquid pump arrangement according to one of the preceding claims, with a housing (40) and one removable from the housing Valve insert (49). Check valve unit according to claim 17, characterized in that according to the characteristics of the characteristic Part of at least one of claims 2 to 9 or 11 to 14 is formed.

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