EP2918741A1 - Return flow block - Google Patents

Abstract

The application relates to a backflow barrier (1), which has a, with an inlet (3) connectable jet nozzle (4) and a catching part (5), the of the jet nozzle (4) via a free jet path (6) coming liquid jet and that is connectable or connected with a drain (7), and with an outlet (8) arranged below the free jet path (6), which outlet (8) has to discharge a liquid subset not captured by the capture part (5). In this case, the jet nozzle (4) is displaceably guided in the backflow barrier (1, 100) and is displaceable from a standby position into a spray position, in which spray position the jet nozzle (4) with its nozzle section delimiting a nozzle opening (21) has an insertion opening (36 ), which is provided in an elastic membrane (35) or closed in the ready position by a flap.

Description

The invention relates to a backflow barrier which has a jet nozzle which can be connected to an inlet and a catching part which has to capture the liquid jet coming from the jet nozzle via a free jet path and which can be connected or connected to a drain, and with an outlet arranged below the free jet path, which outlet has to discharge a liquid subset not captured by the catching part.

Showers in toilets are operated with water from the general supply network. To protect the general supply network, from which the integrated into the toilets Unterduschen be fed, against the ingress of pathogenic germs, a permanent-acting backflow barrier is required. If the spray nozzle of a sub-shower is located in the area of the edge of a toilet bowl bowl, it must be expected that the nozzle opening of this spray nozzle becomes contaminated with dirty water or excrement particles. Since there is a risk in a direct connection with the water supply, that may result in pathogenic germs via the shut-off valve in the Drinking water supply network, provide the national and European standards and the conditions of the water companies before a so-called indirect connection between the general supply network and the toilet, if these toilets, possibly also in the toilet seat, are equipped with a sub-shower.

Also, it is already known to combine the bath inlet with the bath spout in a tub bottom side trough opening. Since the bathtub inlet is thus arranged below the water surface, the bath water can run into the bathtub free of splash water and with little noise. However, since the bathing water present on the incoming water and the bath opening, already in the bathtub, involves the risk that contaminated bath water or service water flows into the water supply network, an effective inlet safety device and backflow barrier must also be ensured in this application example.

From the CH-PS 444 076 already a reflux barrier of the type mentioned is known. The known backflow barrier has a housing in which a jet nozzle is provided. In order to connect the jet nozzle to the general drinking water supply network, the jet nozzle can be connected to a housing inlet. In the housing, a catching part is provided, which has to capture the coming of the jet nozzle via a free jet path liquid jet. In order to be able to guide the water trapped again at the catching part to the spray nozzle of a sub-shower, the catching part in the housing can be connected to a housing outlet. Below the jet section located between the jet nozzle and the trapping part, there is arranged a housing outlet which has to discharge an amount of liquid, not trapped by the trapping part, out of the housing interior.

These, also referred to in the standards as "free-flow with injector" return barriers, the pressure energy of the inflowing water from the supply network in the jet nozzle is converted into kinetic energy to bring the water jet on the short free jet distance to the atmosphere in combination and subsequently to at least partially convert the kinetic energy of the water jet in the area of the trapping part, also referred to as a diffuser, into pressure energy which is required, for example, for the cleaning jet of the sub-showers. In order to be able to accomplish the conversion of the pressure energy into kinetic energy and subsequently vice versa without major energy losses, and in order to produce a homogeneous and smooth water jet in the area of the free jet path, the jet nozzle and the capture part are to be adapted to each other and to the specific conditions of the respective supply network , It is a disadvantage that the prior art backflow barriers are indeed optimized in view of the prevailing conditions in a particular supply network, but that these backflow barriers may not provide optimal performance under different conditions. It is always effective to ensure that the pipe network is not contaminated with dirty water.

The optimized coordination between the jet nozzle and the catching part can be impaired if, in particular, dirt or calcium deposits form on the nozzle opening of the catching part. Such lime deposits are possible if the water droplets remaining at the nozzle opening of the jet nozzle evaporate and a lime residue originally contained in the water remains behind.

It is therefore an object to provide a backflow barrier of the type mentioned above, which can be operated relatively low maintenance and in particular the risk of limescale is reduced.

The achievement of this object is in the backflow barrier of the type mentioned in particular in that the jet nozzle is displaceably guided in the backflow barrier and displaced from a standby position into a spraying position, in which injection position the jet nozzle with its nozzle orifice delimiting a nozzle section Through opening pierces, which is provided in an elastic membrane or closed in the ready position by a flap.

In this, constructed in accordance with the proposed invention reflux barrier, the jet nozzle is guided displaceably in the return flow barrier and displaceable from a standby position into a spray position. While the jet nozzle in the spray position with its nozzle opening delimiting nozzle portion pierces a through-hole provided in an elastic membrane or in the standby position is closed by a flap, the jet nozzle is concealed in the standby position of the elastic membrane or the flap, so that one Lime deposits leading to reduced evaporation occurs.

In order to be able to displaceably guide the jet nozzle in the backflow barrier and to be able to produce such a backflow barrier in the simplest possible way, a preferred embodiment according to the invention provides that a sleeve-shaped jet nozzle receptacle is provided, in which the jet nozzle slidably guided, and that the jet nozzle receiving over at least one connecting web connected to the trapping part.

It has been shown that the edge region delimiting the nozzle opening should be designed as sharp-edged as possible in order to allow a non-squirting liquid jet to emerge from the jet nozzle. During the manufacturing process, however, there is a risk that this sharp-edged configuration of the edge region delimiting the nozzle opening is impaired by external influences. To counteract such damage to the sharp-edged edge region, a preferred embodiment according to the invention provides that an annular projection is integrally formed on the jet nozzle, which surrounds the nozzle opening.

The generation of a high-energy and non-splashing liquid jet in the jet nozzle is favored when the nozzle opening of the jet nozzle delimiting opening edge is sharp-edged and designed to be chamfered and without rounding.

In this case, a preferred embodiment according to the invention provides that this opening edge of the nozzle opening has an edge degree of less than 0.1 mm or greater minus 0.1 mm.

An optimized outlet of the liquid jet from the jet nozzle is favored when the jet nozzle has a hollow cylindrical clear cross-section in the region of its nozzle opening.

In order to counteract evaporation-induced lime deposits in the region of the nozzle opening of the jet nozzle, a preferred development according to the invention provides that the jet nozzle is arranged in the region of the nozzle opening in the standby position in a water bath or surrounded by water, and in that the flap or the membrane preferably closes the insertion opening in the ready position in a liquid-tight manner. Since the jet nozzle is arranged with its nozzle opening in the standby position in a water bath or surrounded by water, evaporation-related limescale deposits on the nozzle opening of the jet nozzle is effectively counteracted. The jet nozzle is only advanced from the water bath or from the water surrounding in the ready position, when the jet nozzle in the spray position pierces the insertion opening, which is provided in the elastic membrane or closed during the standby position by a flap.

The sliding movement of the jet nozzle between the ready position and the injection position is possible by means of a motor drive. However, a particularly simple and therefore preferred embodiment according to the invention provides that the jet nozzle is displaceable from the ready position against a restoring force in the injection position.

A preferred development according to the invention provides, instead of a motor drive, that the jet nozzle is displaceable under the pressure of the liquid flowing through.

In this case, at least one restoring spring can be provided as restoring force, in particular if the insertion opening is to be closed by a flap during the standby position. However, a particularly simple and therefore preferred embodiment according to the invention provides that the restoring force is the inherent elasticity of the material used for the membrane, which is preferably applied to the jet nozzle.

In order to be able to exert sufficient restoring force on the jet nozzle displaceably guided in the jet nozzle receptacle, it is advantageous if the jet nozzle protrudes into a pot-shaped membrane which carries the push-through opening on a pot base of its pot shape, and if it faces away from the bottom of the pot The peripheral edge of the membrane is elastically supported on the jet nozzle.

A preferred embodiment according to the invention provides that the membrane in the region of the pot bottom of its pot shape seals the jet nozzle receptacle in the region of an opening provided in the guide wall and that the membrane has at least one flow opening at the periphery of its pot shape, which surrounds the interior of the jet nozzle. Recording with the interior of the cup-shaped membrane connects. The sliding movement of the jet nozzle takes place against the inherent elasticity of the membrane. Since the membrane in its the jet nozzle acting on the peripheral edge area must have sufficient space for membrane deformation available, and since the sliding movement of the jet nozzle can be obstructed by means of the membrane densely separated amount of water, there is always a sufficient balance of located in the jet nozzle recording Ensure water during the sliding movement. Since the membrane at the periphery of its pot shape has at least one flow opening which connects the interior of the jet nozzle recording with the interior of the cup-shaped membrane, a damming a water subset obstructing the sliding movement of the jet nozzle is counteracted.

Preferred application examples for the designed according to at least one of the inventions described backflow barrier provide that the backflow barrier is connected upstream of a sanitary consumption point on the inflow side, and that the sanitary consumption point is preferably a sub-shower or a bottom-side water inlet of a sink or a bathtub. However, the reflux barrier according to the invention can also be used, for example, in front of the consumption points provided in a hospital in order to prevent a contamination of the tap water by germs with certainty.

Further developments according to the invention will become apparent from the claims in conjunction with the following description of the figures.

The invention will be described in more detail below with reference to preferred embodiments.

Fig. 1

eine in einem Längsschnitt dargestellte Rückfluss-Sperre mit einer Kartuschen-Aufnahme, in die eine Einsetzkartusche eingesetzt ist, die eine Strahldüse und ein, den von der Strahldüse über eine freie Strahlstrecke kommenden Stahl einfangendes:Einfangteil trägt,

Fig. 2

die Rückfluss-Sperre aus Figur 1 in einer Seitenansicht,

Fig. 3

die Rückfluss-Sperre aus Figur 1 und 2 in einer Draufsicht,

Fig. 4

die Rückfluss-Sperre aus den Figuren 1 bis 3 in einer auseinandergezogenen Darstellung ihrer wesentlichen Bestandteile,

Fig. 5

eine mit Figur 1 bis 4 vergleichbar ausgestaltete und hier ebenfalls in einem Längsschnitt dargestellte Rückfluss-Sperre, bei der die an der Einsetzkartusche vorgesehene Strahldüse und Einfangteil als separate Bauteile ausgebildet sind,

Fig. 6

die Rückfluss-Sperre aus Figur 5 in einer Seitenansicht,

Fig. 7

die Rückfluss-Sperre aus Figur 5 und 6 in einer Draufsicht,

Fig. 8

die Rückfluss-Sperre aus den Figuren 5 und 7 in einer auseinandergezogenen Darstellung ihrer wesentlichen Bestandteile,

Fig. 9

eine Rückfluss-Sperre in einem Längsschnitt, bei der die Einsetzkartusche durch ein rohrförmiges Verbindungsstück ausgetauscht ist, wobei die hier dargestellte Rückfluss-Sperre einen Rückfluss allenfalls über einen integrierten Rückflußverhinderer verhindern kann,

Fig. 10

die Rückfluss-Sperre aus Figur 9 in einer Seitenansicht,

Fig. 11

die Rückfluss-Sperre aus den Figuren 9 und 10 in einer auseinandergezogenen Darstellung ihrer wesentlichen Bestandteile,

Fig. 12

eine Strahldüse für eine Rückfluss-Sperre gemäß den Figuren 1 bis 8 in einer perspektivischen Darstellung ihrer wesentlichen Bestandteile,

Fig. 13

die Strahldüse aus Figur 12 in einem Längsschnitt, wobei die Strahldüse in einer hülsenförmigen Strahldüsen-Aufnahme derart verschieblich geführt ist, dass diese Strahldüse mit ihrer vorstehenden Düsenöffnung in Spritzstellung die Durchstecköffnung einer Membran durchstoßen kann, wobei die Strahldüse hier in ihrer in die hülsenförmige Strahldüsen-Aufnahme zurückgezogenen Bereitschaftsstellung gezeigt ist,

Fig. 14

die in der Bereitschaftsstellung befindliche Strahldüse in einer Draufsicht auf die von der Strahldüse zu durchstoßende Membran,

Fig. 15

die Strahldüse aus den Figuren 12 bis 14 in der hier längsgeschnitten dargestellten Spritzposition der Düsenöffnung,

Fig. 16

die Strahldüse aus Figur 12 bis 15 in einer Stirnansicht auf die über die Durchstecköffnung der Membran vorstehende Strahlöffnung,

Fig. 17

die Rückfluss-Sperre in einem schematischen Längsschnitt im Bereich ihres Einfangteiles,

Fig. 18

eine gemäß den Figuren 1 bis 17 ausgestaltete Rückfluss-Sperre, die hier dem wannenbodenseitigen Wassereinlauf einer Badewanne zuströmseitig vorgeschaltet ist,

Fig. 19

eine Rückfluss-Sperre, die in den Wasserzulauf einer gegebenenfalls auch nachträglich an einem WC-Sitz oder eine WC-Keramik montierbaren Unterdusche zwischengeschaltet ist,

Fig. 20

die schematisch dargestellte Wasserführung der in Figur 19 gezeigten Unterdusche, die eine als "Shattaf-Shower" bezeichnete Handbrause hat, wobei die zwischengeschaltete Rückfluss-Sperre im Wasserzulauf erkennbar ist,

Fig. 21

eine weitere Ausführungsform einer Rückfluss-Sperre in einem Längsschnitt, wobei die in Figur 21 gezeigte Rückfluss-Sperre ähnlich zu der in den Figuren 1 bis 18 gezeigten Rückfluss-Sperre ausgebildet ist,

Fig. 22

die Rückfluss-Sperre aus Figur 21 in einer perspektivischen Einzelteildarstellung,

Fig. 23

die Rückfluss-Sperre aus den Figuren 21 und 22 in einer Draufsicht auf den Auslauf dieser Rückfluss-Sperre,

Fig. 24

die in den Figuren 21 und 23 gezeigte Rückfluss-Sperre in einer Seitenansicht,

Fig. 25

die Rückfluss-Sperre aus den Figuren 21 bis 24 in einer Draufsicht auf die dem Auslauf abgewandte Oberseite,

Fig. 26

die hier ebenfalls längs geschnittene Rückfluss-Sperre aus den Figuren 21 bis 25, wobei in dieser Rückfluss-Sperre eine gegen eine Rückstellkraft verschieblich geführte Strahldüse vorgesehen ist, die hier in zwei Schiebepositionen gezeigt ist,

Fig. 27

die Rückfluss-Sperre aus den Figuren 21 bis 26 in den einander gegenübergestellten Schiebepositionen ihrer verschieblich geführten Strahldüse,

Fig. 28

die Strahldüse der in den Figuren 21 bis 27 gezeigten Rückfluss-Sperre in einem Längsschnitt,

Fig. 29

die Spritzdüse der in den Figuren 21 bis 27 gezeigten Rückfluss-Sperre im Bereich ihrer Düsenöffnung, und

Fig. 30

die Strahldüse aus den Figuren 28 und 29 in einer Draufsicht auf die Düsenöffnung.

It shows:

Fig. 1

a longitudinally-sectioned backflow barrier with a cartridge receptacle into which is inserted an insertion cartridge carrying a jet nozzle and a catching part which traps the steel coming from the jet nozzle via a free jet path;

Fig. 2

the reflux lock off FIG. 1 in a side view,

Fig. 3

the reflux lock off FIGS. 1 and 2 in a plan view,

Fig. 4

the reflux barrier from the FIGS. 1 to 3 in an exploded view of their essential ingredients

Fig. 5

one with Figure 1 to 4 similarly designed and here also shown in a longitudinal section return flow barrier, in which the provided on the cartridge cartridge and Einfangteil are formed as separate components,

Fig. 6

the reflux lock off FIG. 5 in a side view,

Fig. 7

the reflux lock off FIGS. 5 and 6 in a plan view,

Fig. 8

the reflux barrier from the FIGS. 5 and 7 in an exploded view of its essential components,

Fig. 9

a reflux barrier in a longitudinal section, in which the insertion cartridge is replaced by a tubular connecting piece, wherein the backflow barrier shown here can prevent a reflux at best via an integrated backflow preventer,

Fig. 10

the reflux lock off FIG. 9 in a side view,

Fig. 11

the reflux barrier from the FIGS. 9 and 10 in an exploded view of its essential components,

Fig. 12

a jet nozzle for a backflow barrier according to the FIGS. 1 to 8 in a perspective view their essential components,

Fig. 13

the jet nozzle off FIG. 12 in a longitudinal section, wherein the jet nozzle is guided displaceably in a sleeve-shaped jet nozzle recording that this jet nozzle can pierce the insertion opening of a membrane with its projecting nozzle opening in injection position, wherein the jet nozzle is shown here in its retracted into the sleeve-shaped jet nozzle recording standby position .

Fig. 14

the jet nozzle in the ready position in a plan view of the membrane to be pierced by the jet nozzle,

Fig. 15

the jet nozzle from the FIGS. 12 to 14 in the injection position of the nozzle opening shown here cut longitudinally,

Fig. 16

the jet nozzle off FIGS. 12 to 15 in an end view onto the jet opening projecting beyond the push-through opening of the membrane,

Fig. 17

the reflux barrier in a schematic longitudinal section in the region of its catching part,

Fig. 18

one according to the FIGS. 1 to 17 configured reflux barrier, which is connected upstream of the tub bottom side water inlet of a bathtub on the inflow side,

Fig. 19

a backflow-lock, which in the water supply one possibly also afterwards at a toilet-seat or a WC ceramic mountable under shower is interposed,

Fig. 20

the schematically illustrated water supply of in FIG. 19 shown sub-shower, which has a "Shattaf-Shower" designated hand shower, the intermediate backflow barrier is recognizable in the water inlet,

Fig. 21

a further embodiment of a reflux barrier in a longitudinal section, wherein the in FIG. 21 shown reflux barrier similar to that in the FIGS. 1 to 18 formed reflux barrier is formed,

Fig. 22

the reflux lock off FIG. 21 in a perspective detail view,

Fig. 23

the reflux barrier from the FIGS. 21 and 22 in a plan view of the outlet of this reflux barrier,

Fig. 24

in the FIGS. 21 and 23 shown reflux barrier in a side view,

Fig. 25

the reflux barrier from the FIGS. 21 to 24 in a plan view of the outlet facing away from the top,

Fig. 26

the here also longitudinally cut backflow barrier from the FIGS. 21 to 25 , wherein in this reflux barrier, a jet nozzle, which is displaceably guided against a restoring force, is provided, which is shown here in two sliding positions,

Fig. 27

the reflux barrier from the FIGS. 21 to 26 in the opposing sliding positions of their slidably guided jet nozzle,

Fig. 28

the jet nozzle in the FIGS. 21 to 27 shown reflux barrier in a longitudinal section,

Fig. 29

the spray nozzle in the FIGS. 21 to 27 shown backflow barrier in the region of its nozzle opening, and

Fig. 30

the jet nozzle from the FIGS. 28 and 29 in a plan view of the nozzle opening.

In the FIGS. 1 to 30 is a reflux barrier 1, 100 shown in various versions, which may be upstream of a sanitary consumption point, such as a shower or the bathtub inlet of a bathtub upstream. This backflow barrier 1, 100 is intended to prevent a return flow of contaminated water in the drinking water supply network with certainty.

The in the FIGS. 1 to 20 illustrated reflux barrier 1 has a cartridge receptacle 2, which can be integrated, for example, in a shape-adapted recess on the toilet seat. As if from a comparison of FIGS. 1 to 8 becomes clear, in the cartridge receptacle 2 a connectable to an inlet 3 of the cartridge receptacle 2 jet nozzle 4 and a catching part 5 is provided, which has to catch the coming of the jet nozzle 4 via a free jet path 6 liquid jet. While the jet nozzle 4 is connected via the inlet 3 of the cartridge holder 2 with the drinking water supply network, the catching part 5 is over a course of Cartridge receptacle 2 with a spray nozzle not shown or the in Fig. 19 and 20 pictured and referred to as "Shattaf-Shower" hand shower 45 connected to a sub-shower. Below the free jet path 6, over which the water is guided as a water jet freely in the atmosphere, an outlet 8 of the cartridge receptacle 2 is provided, which has to derive a not captured by the catching part 5 liquid subset from the interior of the cartridge receptacle 2 , To the cartridge holder 2, a spacer 68 is integrally formed, which has to ensure a standard minimum distance between the outlet 8 and a downstream in the flow direction backflow level. This spacer 68 is approximately sleeve-shaped in cross-section and has on its longitudinal sides on both sides through-flow openings 69, which are oriented in the longitudinal extension of the spacer 68. These provided on both sides of the longitudinal sides of the spacer 68 through-flow openings 69 give the spacer 68 a cage-like appearance.

The in the FIGS. 1 to 8 shown backflow locks 1 is associated with an insertion cartridge 9, which carries the jet nozzle 4 and the catching part 5. This insertion cartridge 9 is inserted through an insertion opening 10, for example in the in FIG. 1 shown cartridge receptacle 2 can be used and releasably fixed therein, that the jet nozzle 4 is connected to the inlet 3 of the cartridge holder 2. From the FIGS. 1 and 5 It is clear that the Einsetzkartuschen 9 arranged in its between jet nozzle 4 and 5 catching and the free jet path 6 forming or delimiting cartridge section has at least one associated with the outlet 8 of the cartridge receptacle 2 cartridge opening 11. In the case of the insertion cartridge 9 shown here, the cartridge opening 11 and the outlet 8 of the cartridge receptacle 2 adjoin one another directly.

The insertion opening 10, through which the insertion cartridge 9 can be inserted into the interior of the cartridge receptacle 2, can be closed by means of a cap 12, on which the insertion cartridge 9 can be detachably fixed. The cap 12 is here releasably held by means of a plug / rotary connection to the cartridge receptacle 2, wherein the plug / rotary connection may be formed, for example, as a bayonet or the like Renkverbindung.

The cap 12 has a cap extension 13, onto which the insertion cartridge 9 can be pushed or pushed with its adjacent, end-side open cartridge end region 14.

The insertion cartridge 9 is thus easy to handle even in confined spaces on the always accessible from the outside cap 12.

The insertion cartridge 9 has at least one inlet 15 which can be connected to the inlet 3 of the cartridge receptacle 2 via an annular space 16 which is enclosed between the inner circumference of the cartridge receptacle 2 and the outer periphery of the cartridge and circumferentially sealed on both sides in the longitudinal direction of the cartridge receptacle 2. The inlet cartridge 9 has here two oval and oriented in the cartridge circumferential direction inlets 15. The inlet 3 of the cartridge receptacle 2 opens in the circumferential direction evenly spaced from the arranged here on opposite sides at the same height inlets 15 in the annular space 16th

From a comparison of FIGS. 1 and 5 on the one hand and the FIGS. 4 and 8th On the other hand, it can be seen that the cap extension 13 by a number of parallel, slightly spaced apart and lamellar to each other arranged flow guide walls 17 is formed. If the insertion cartridge 9 is placed on the cap 12, the spaces between the flow guide walls 17 connect the inlets 15 with each other, so that the water flows flowing in through the inlets 15 collide there and deflect in the longitudinal direction of the cartridge, where they pass through between the adjacent flow guide walls 17 in the direction of the jet nozzle 4 arranged free passages or openings 18 flow into the cartridge interior.

Between the inlets 15 and the jet nozzle 4, an insertion cartridge 19 is provided, which can be inserted from the end face open cartridge end portion 14 in the cartridge interior. The insertion cartridge 19 has at least one backflow preventer, which allows a flow of water only in the direction of the jet nozzle 4. The Einsetzpatrone 19 also has a flow rate regulator, which has to limit the pressure per unit time flowing through water pressure-independent to a certain value and regulate.

At the in FIG. 5 and 21 in a longitudinal section shown reflux barriers 1, 100, the jet nozzle 4 is guided in a sleeve-shaped jet nozzle receptacle 50 slidably. This jet nozzle receptacle 50 is integrally connected to the catching part 5 via at least one connecting web 51 and preferably two connecting webs 51 arranged parallel to the free blasting path 6.

In the in the FIGS. 21 to 27 shown return flow restrictor 100 form the jet nozzle receptacle 50 and the associated capture part 5 an insertion element 52 which is insertable into a cup-shaped housing 53. The housing 53 has for this purpose a longitudinal insertion opening 54, through which the insertion element 52 can be used.

The insertion element 52 is detachably fixable in the housing 53 such that the insertion opening 54 simultaneously forms the outlet 8. The jet nozzle receptacle 50 can be closed at its end facing away from the jet nozzle 4 by means of a cover 55 which carries an inlet connectable to the inlet. This inlet is formed here as a connection nipple 56 which is connectable via a hose not shown with the inlet. In order to always ensure a sufficient distance between serving as an outlet 8 insertion opening 54 and the respective housing base, at least one spacer may be formed on the housing 53. Preferred is an embodiment, not shown here, in which a plurality of spacers are provided, which are arranged in particular in the housing corner regions.

In the FIGS. 21 and 22 It can be seen that a connection nipple 57 or the like outlet is also integrally formed on the catching part 5 in order to connect the catching part 5, for example via a hose line, to the outlet leading to a point of consumption. In the FIGS. 21 and 22 It can be seen that a groove 58 is provided on the outer peripheral side of the catching part 5 and on the connecting nipple 57 serving as an outlet, into which a wall opening 59 open towards the insertion opening 54 engages on the housing front side of the housing 53. Since the insertion opening defining the wall opening 59 engages in the groove 58, positionally correct positioning of the insertion element 52 formed by the jet nozzle 4 and the catching part 5 is always ensured.

In the FIGS. 21 and 22 It can be seen that a guide wall 60 is integrally formed on the jet nozzle receptacle 50 on the outside. This guide wall 60, on both sides of each one the connecting webs 51 engages, is in the position of use of a fork-shaped holder 61, which protrudes in the housing interior of the housing 53. The forks 62 of the holder 61 are arranged on both sides at a distance from the nozzle opening of the jet nozzle 4 in order not to impair the proper functioning of the jet nozzle 4. Since the guide wall 60 bears against the holder 61 in the use position, a positionally correct insertion of the insertion element 52 into the housing 53 is likewise ensured. Since the holder 61 is arranged with their forks 62 between the connecting webs 51, a rotational securing of the insertion element 52 in the housing 53 is achieved.

In FIG. 21 is clearly visible that the jet nozzle receptacle 50 frontally occlusive cover 55 in the position of use rests on the inside of the adjacent housing end face of the housing 53. In this case, the connecting nipple 56 formed on the cover 55 passes through a holding opening 70, which is open towards the insertion opening 54, on the housing front side. The holding opening 70 and also the wall opening, which receive the connection nipples 56, 57 in the position of use, have in their opening outline at least on one side and preferably on both sides a recess 71, by means of which the connection nipple 56 or 57 can be releasably latched. The recesses 71 provided on both sides in the opening outline give the holding opening 70 and also the wall opening 59 an opening outline which is comparable to the keyhole provided for a beard key. In this way, a secure hold of the insertion 52 in the housing 53 is ensured.

From the FIGS. 1, 4 . 5, 8 . 21, 22 and 26 It is clear that the jet nozzle 4 is preceded by a conically projecting sieve 20. The wire 20 or a grid is so fine-meshed designed so that the different over the cross section pressures in the water stream are made uniform.

The jet nozzle 4 of the return flow barriers 1, 100 has to convert the pressure energy of the water coming from the supply network into the kinetic energy of the water jet. For this purpose, it is provided that the flow guide tapers in a funnel shape in the direction of the nozzle opening 21 of the jet nozzle 4. In the region of the nozzle opening 21, the jet nozzle 4 is designed as a nipple-shaped or knob-shaped projection 22 in order to minimize the effects on the water jet caused by the adhesion forces.

In the free beam path 6 is at a distance from the capture part 5 and jet nozzle 4 at least one spray or partition wall 23 is arranged, which has a passage opening 24 which has a larger compared to the beam cross section of the liquid jet clear cross-section. In this case, the clear opening cross-section of the passage opening 24 is dimensioned so that the liquid jet unbundled from the passage opening 24 and just passes through non-contact. In order not to interfere with the liquid jet, the spray or dividing wall 23 provided at a distance between the blasting nozzle 4 and the catching part 5 is arranged closer to the catching part 5. In this case, an embodiment is preferred in which the spray or partition wall 23 is spaced at least four millimeters from the catching part 5.

The trapping part 5 is intended to convert the kinetic energy of the water jet coming from the jet nozzle 4 and the trapping part 5 into a corresponding pressure energy, which is subsequently applied to the cleaning or water jet emerging, for example, from the spray nozzle, the hand shower 45 of a sub-shower or another sanitary appliance is needed. From the FIGS. 1 . 5 . 21 and 26 It is clear that the catching part 5 widens in a funnel shape in its clear cross-section. The catching part 5 has a catching opening 28 which, at least in its inflow-side section 25, has a hollow-cylindrical clear opening cross-section. Subsequent to the hollow-cylindrical section 25, the catching part 5 widens in the direction of the outlet. On the outflow side of the hollow cylindrical portion 25, the catching part 5 conically or in the clear cross section arcuately widening sections 26, 27, of which the inflow-side section 26 has a smaller compared to the subsequent section 27 expansion.

In the return flow barrier 1, the catching part 5 opens into a cartridge outlet 30 arranged at the front-side cartridge end 29, which is provided adjacent to the outlet 7 of the cartridge receptacle 2. The insertion cartridge 9 is circumferentially sealed in the region of the cartridge end 30 having cartridge end 29 relative to the circumference of the cartridge receptacle 2.

The insertion cartridge 9 of the backflow barrier 1 can be used and fixed in the cartridge receptacle 2 such that the blasting nozzle 4 is connected to the inlet 3 of the cartridge receptacle 2 and at the same time the catching part 5 is connected to the outlet 7 of the cartridge receptacle 2. The insertion cartridge 9 of the return flow barrier 1 has at least one cartridge opening 11 in its cartridge section which is arranged between the jet nozzle 4 and the catching part 5 and delimits the free jet path 6 and which communicates with the outlet 8 of the cartridge receptacle 2. By loosening the insertion cartridge 9 from the cartridge holder 2 and replacing this Einsetzkartusche 9 can be the backflow barrier 1, the cartridge recording 2 molded, for example, in a toilet seat, a toilet ceramics or a bathtub or - as here - can be designed as an insertable into a corresponding receptacle on the toilet seat, on the toilet ceramics or on the tub opening of a bathtub housing adapt little effort to a variety of predetermined conditions such that always an optimal function is guaranteed. By loosening the insertion cartridge 9 from the cartridge holder 2, the backflow barrier 1 is also easy to clean and to descale if necessary.

The in the FIGS. 1 to 4 . 5 to 8 and 21 to 27 illustrated embodiments of the backflow barrier 1, 100 differ only in that in the in FIGS. 5 to 8 As shown embodiment, the jet nozzle 4 on the one hand and the catching part 5 on the other hand each configured as a releasably insertable into the insertion cartridge 9 component. Due to the design of jet nozzle 4 and trapping 5 as a separate component, the modular design of in FIGS. 5 to 8 shown backflow barrier 1 favors that optionally also by replacing the jet nozzle 4 and / or the catching part 5, the insertion cartridge 9 can be adapted to the respective conditions of the existing on-site supply network.

Since in the other reflux barriers 1, 100 of the free jet path 6 of the insertion cartridge 9 and the insertion element 52 forming portion is formed only by the two longitudinally oriented connecting webs 51, the insert cartridge 9 of the backflow barrier 1 and the insert 52 of Reflux barrier 100 formed open in the region of this free beam path 6. In order for the reflux barriers 1, 100 to dry quickly after each use, is in the area of free Beam section 6 at least one vent opening provided.

In the return flow lock 1 are on the outlet 8 of the cartridge holder 2 opposite side of in Figure 1 to 8 shown cartridge receptacle 2 to slot-shaped ventilation openings 37 are provided, which run like a labyrinth through the wall of the cartridge holder 2. In contrast, the housing 53 of in FIG. 21 shown reflux barrier 100 two slot-shaped ventilation openings 63, which are arranged on the insertion opening 54 facing away from the longitudinal side. These two slot-shaped ventilation openings 63 are oriented parallel to one another and at a distance from each other in the housing longitudinal direction. Since the connecting webs 51 of the insertion element 52 located in the housing 53 project into a plane imagined by the slot-shaped ventilation openings 63, a labyrinth-like air guide through the ventilation openings 63 is also achieved in the return flow barrier 100.

The backflow barriers 1, 100 shown here provide maximum safety in order to prevent backflow of contaminated water into an area connected to the drinking water supply network. In order to be able to use the reflux barrier 1, 100 also where such a high level of safety is not required, it is possible to replace the insertion cartridge 9 of the backflow barrier 1 in the cartridge receptacle 2 with a sleeve-shaped connecting piece 31 which supports the bridged free beam path and the inlet 3 of the cartridge holder 2 with the outlet 7 of the cartridge holder 2 optionally with the interposition of a Einsetzpatrone 19, which has at least one backflow preventer connects.

From the FIGS. 9 to 11 it becomes clear that the modular

Design of the return flow lock 1 facilitates the replacement of the insertion cartridge 9 against a corresponding connector 31. From a comparison of FIGS. 9 and 11 It is clear that the sleeve-shaped connecting piece 31 is placed with its open front end on the cap extension 13 of the cap 12 such that lateral inlet openings 32 are connected via the annular space 16 with the inlet 3 of the cartridge receptacle 2. In this case, the inserted into the connecting piece 31 Einsetzpatrone 19 between the cap extension 13 and a arranged on the inner circumference of the connecting piece 31 annular shoulder 33 is secured.

In the FIGS. 12 to 15 and 21 to 27 At least the portion of a deviating designed return flow restrictor 1, 100 is the jet nozzle 4 having shown. Like from the FIGS. 12 to 15 and 21 to 27 can be seen, the jet nozzle 4 is guided displaceably in the jet nozzle receptacle 50 and of a in. In this deviating designed return flow restrictor 1, 100 FIGS. 13 and 14 shown ready position under the pressure of the liquid flowing through against a restoring force in a spray position displaced in which injection position - like FIGS. 15 and 16 or 26 and 27 show - the jet nozzle 4 with its nozzle opening 21 forming and formed as a projection 22 nozzle portion pierces a provided in an elastic membrane 35 through opening 36. While at the in the FIGS. 15 and 16 shown embodiment, the restoring force is applied by a return spring 34 to the jet nozzle 4, forms in the in FIGS. 26 and 27 shown embodiment, the elastic material and / or the elastically flexible shape of the elastic membrane 35 acting on the spray nozzle 4 return element.

In FIGS. 26 and 27 it can be seen that the jet nozzle 4 to protrudes into the here cup-shaped membrane 35 which carries the insertion opening 36 at the pot bottom of their pot shape. In this case, the peripheral edge of the membrane 35 facing away from the bottom of the pot is supported elastically on the jet nozzle 4. In the FIGS. 26 and 27 It can be seen that the membrane 35 seals the jet nozzle receptacle 50 in the region of an opening provided in the guide wall 64 in the region of the pot bottom of their pot shape and that the membrane 35 at the periphery of its cup shape at least one flow opening and preferably a plurality of spaced apart flow openings 65 which slit-shaped and oriented in the circumferential direction. These flow openings 65 connect the interior 66 of the jet nozzle receptacle 50 with the interior 67 of the cup-shaped membrane 35, so that a fluid exchange between these interior spaces 66, 67 during the sliding movement of the jet nozzle 4 is made possible. To counteract an evaporation-related calcification of the jet nozzles 4 in the region of its nozzle opening 21, it is provided that the jet nozzle 4 in its in FIG. 27 The standby position shown on the left is surrounded or lapped by water.

FIG. 17 shows a backflow barrier according to the invention in a schematic partial longitudinal section in the region of their catching part 5. Aus FIG. 17 It is clear that the catching part 5 protrudes nipple-shaped or knob-shaped on the outer peripheral side in its section delimiting the catching opening 28. Furthermore, in FIG. 17 shown that the catching part 5 has a hollow cylindrical or approximately hollow cylindrical section in the region of its catching opening 28. It may be advantageous if the ratio of the length l _{1 of} this section in comparison to the clear inner diameter of the capture opening is preferably greater than / equal to 0.2 to less than / equal to 10, in particular greater than / equal to 1.5 to less than / equal to 2.6 , In FIG. 17 is also recognizable that the catching part 5, preferably expanded in a funnel shape following the hollow cylindrical part. It is provided that the catching part on the outflow side of its hollow cylindrical portion 25 has at least one in the flow direction conically widening portion 26, 27 and that the immediately adjacent to the hollow cylindrical portion section has a length l ₂ from 0 to 100 mm inclusive, preferably from 0 to 30 mm inclusive. In this case, the embodiment shown here is preferred in which the catching part 5 has at least two sections 26, 27 which flare in the direction of flow, wherein at least two downstream sections 26, 27 have the length l ₃ of at least the downstream and preferably more extensive section 0 to 100 mm, preferably from 0 to 30 mm.

In FIG. 17 It can also be seen that the catching part 5 has an angle a ₂ of greater than / equal to 0 to less than / equal to 45 °, preferably greater than / equal to 0 to less than / equal to 18 °, in the region of its more conically widening section 27 with respect to the longitudinal axis of the catching part , In this case, between this more conically widening portion 27 and the hollow cylindrical portion 25 provided portion of the catching part 5, which has a lower conicity, an angle a ₁ relative to the catching longitudinal axis of greater than or equal to 0 to / equal to 45 °, preferably from greater than or equal to 0 to less than or equal to 13 °.

This preferred range in the embodiment of the catching part 5 is reproduced again in the table below: Closest interpretation Widest interpretation l ₁ / d 1.5 ≤ l ₁ / d ≤ 2.6 0.2 ≤ l ₁ / d ≤ 10 l ₂ [mm] 0 ≤ l2 ≤ 30 0 ≤ l ₂ ≤ 100 l ₃ [mm] 0 ≤ l3 ≤ 30 0 ≤ l3 ≤ 100 a ₁ (in degrees) 0 ≤ a1 ≤ 13 0 ≤ a1 ≤ 45 a ₂ (in degrees) 0 ≤ a2 ≤ 18 0 ≤ a2 ≤ 45

The backflow barrier 1 shown here can be connected upstream of a shower and, in particular, the sub-shower assigned to a toilet seat on the inflow side. In addition, however, it is also possible for the return flow lock 1 upstream of the water inlet of a bath 38 on the inflow side. From the schematic representation in FIG. 18 It is clear that in the bath 38 shown here, the bathtub inlet 39 and the bath spout 40 is provided separately from each other on the tub bottom of the bath 38. But it is also possible to merge the bathtub inlet 39 and the bath spout 40 in a common trough opening. As well as the bath inlet 39 is arranged in any case below the water surface of the bathwater located in the bath 38, the bath water can splash-free and quietly enter the bathtub 38. However, since the water pressing on the incoming water and the bathtub inlet 39 also carries the risk that contaminated bathing water or service water flows into the water supply network, in the case of FIG. 18 shown application example to ensure an effective inlet protection necessarily.

The water inlet into the bath 38 is operated via a manually operable outlet fitting 41, which combines a hot water inlet 42 and a cold water inlet 43 in it. After coming from the outlet fitting 41 water the Return flow barrier 1 has reached, the water flowing through can pass between a return flow barrier 1 and the bath inlet 39 interposed backflow preventer 44 before the water flows in the bathtub inlet 39 on the bottom side in the bath 38.

In the schematized representations according to the Figures 19 and 20 It can be seen that the backflow barrier 1 according to the invention can also be interposed in the example leading to a hand shower 45 water inlet 49 of a schematically indicated below shower, which sub-shower in the toilet ceramic or in the toilet seat, where appropriate, also installed later.

As already stated above, the jet nozzle 4 is in the FIGS. 21 to 27 shown backlash 100 in the jet nozzle receptacle 50 slidably guided. The jet nozzle receptacle 50 is designed for this purpose on its side facing away from the nozzle opening 21 by means of the lid 55 apparently. By closed in the position of use by means of the lid 55 insertion opening of the jet nozzle receptacle 50, the jet nozzle 4 can be inserted into the interior of the jet nozzle receptacle 50. In the FIGS. 26 and 27 It can be seen that the jet nozzle 4 in the backflow barrier 100 is displaceable from the ready position shown left to the longitudinal axis under the pressure of the liquid flowing through against a restoring force in the right shown spray position, in which injection position the jet nozzle 4 with its nozzle opening 21 forming Nozzle section pierces the opening provided in the elastic membrane 35 through opening 36. The here substantially conical jet nozzle 4 here has an approximately centrally disposed annular shoulder on which the cap-shaped membrane 35 is supported. The membrane 35, which here cup-shaped and made of elastic material is shaped so that it exerts the restoring force on the slidably guided jet nozzle 4. The sliding path of the jet nozzle 4 in the jet nozzle receptacle 50 is limited on the one hand by a screen 20 upstream of the jet nozzle 4 and on the other hand by an annular shoulder 47 on the inner periphery of the jet nozzle receptacle 50.

In the FIGS. 28 to 30 the jet nozzle 4 of the reflux barrier 1 shown in FIGS. 21 to 27 is depicted. As if from a general view of the FIGS. 28 to 30 becomes clear, the jet nozzle 4 in the region of its nozzle opening 21 on an annular shoulder. To the jet nozzle 4, an annular projection 22 is integrally formed, which surrounds the nozzle opening 21. The nozzle opening of the jet nozzle 4 bounding opening edge is sharp-edged and designed to chamfer and rounding. For this purpose, the opening edge of the nozzle opening 21 has an edge degree smaller than 0.1 mm or greater minus 0.1 mm. Since the nozzle opening and the nozzle opening delimiting opening edge is arranged in the flow direction in front of the annular projection 22 and since the annular projection 22 thus protects the sharp edge of the nozzle opening 21 bounding boundary edge, in the production of the spray nozzle 4 possibly occurring damage to the nozzle opening 21 and their sharp-edged opening edge avoided. The sharp-edged opening edge forms an inner peripheral side provided tear-off edge, which favors a sharply shaped in the jet nozzle 4 and non-splashing liquid jet.

LIST OF REFERENCE NUMBERS

1

Reflux barrier (according to the FIGS. 1 to 20 )

2

Cartridge accommodating

3

Inlet (of the cartridge holder 2)

4

jet

5

capturing member

6

beamline

7

Procedure (Cartridge Recording 2)

8th

outlet

9

Einsetzkartusche

10

Insertion opening (the cartridge holder 2)

11

cartridge opening

12

cap

13

Cap extension

14

Cartridge end portion

15

cartridges inlet

16

annulus

17

Flow guide walls

18

Through opening

19

insertable

20

scree

21

nozzle opening

22

Projection (the jet nozzle 4)

23

Spray or dividing wall

24

Radiation opening (in the spray or dividing wall)

25

(hollow cylindrical) section

26

(conically formed) section

27

Part or transition section (with less conicity)

28

capture opening

29

Cartridge end

30

cartridge expiration

31

(sleeve-shaped) connector

32

inlet openings

33

annular shoulder

34

Return spring

35

membrane

36

Through opening

37

ventilation opening

38

bathtub

39

bath inlet

40

tub spout

41

outlet fitting

42

Hot water supply

43

Cold water supply

44

Backflow preventer

45

Handheld shower

47

annular shoulder

48

shut-off

49

water supply

50

Jets shooting

51

connecting web

52

inserter

53

casing

54

insertion

55

cover

56

Connection nipple (as inlet)

57

Connection nipple (as outlet)

58

groove

59

wall opening

60

guide wall

61

bracket

62

Fork (the holder 61)

63

Ventilation opening (the reflux barrier 100)

64

Opening (in the guide wall 60)

65

Flow opening

66

Interior (the jet nozzle receptacle 50)

67

Interior (the cup-shaped membrane 35)

68

spacer

69

flow-through

70

holding opening

71

return

100

Reflux barrier (according to the FIGS. 21 to 27 )

Claims (13)

Reflux barrier (1, 100), which has a, with an inlet (3) connectable jet nozzle (4) and a catching part (5), which has to capture from the jet nozzle (4) via a free jet path (6) coming liquid jet and with an outlet (7; 57) being connectable or connected, and which is arranged with a lower free beam path (6) outlet (8), which outlet (8) from the catching part (5) has auszuleiten not trapped liquid subset in characterized in that the jet nozzle (4) is displaceably guided in the backflow barrier (1, 100) and is displaceable from a standby position into a spraying position, in which spraying position the jet nozzle (4) with its nozzle section delimiting a nozzle opening (21) has an insertion opening ( 36), which is provided in an elastic membrane (35) or is closed in the ready position by a flap. Backflow-lock according to claim 1, characterized in that a sleeve-shaped jet nozzle receptacle (50) is provided, in which the jet nozzle (4) is displaceably guided, and in that the jet nozzle receptacle (50) via at least one connecting web (51) the catching part (5) is connected. Backflow barrier according to claim 1 or 2, characterized in that an annular projection (22) is integrally formed on the jet nozzle (4), which surrounds the nozzle opening (21). Backflow barrier according to one of claims 1 to 3, characterized in that the nozzle opening (21) of the jet nozzle (4) delimiting opening edge is sharp-edged and designed to be chamfered and without rounding. Backflow barrier according to claim 4, characterized in that the opening edge of the nozzle opening (21) has an edge degree less than 0.1 mm or greater minus 0.1 mm. Backflow barrier according to one of claims 1 to 5, characterized in that the jet nozzle (4) in the region of its nozzle opening (21) has a hollow cylindrical clear cross-section. Reflux barrier according to one of claims 1 to 6, characterized in that the jet nozzle (4) in the region of the nozzle opening (21) is arranged in the standby position in a water bath or surrounded by water, and in that the flap or the membrane, the insertion opening in the ready position closes. Return flow barrier according to one of claims 1 to 7, characterized in that the jet nozzle (4) is displaceable from the ready position against a restoring force in the injection position. Backflow barrier according to one of claims 1 to 8, characterized in that the jet nozzle (4) is displaceable under the pressure of the liquid flowing through. Return flow barrier according to claim 8 or 9, characterized in that at least one return spring (34) is provided as the restoring force. Backflow barrier according to one of claims 8 to 10, characterized in that the restoring force acting on the jet nozzle (4) acting on the inherent elasticity of the material used for the membrane (35). Backflow barrier according to one of claims 1 to 11, characterized in that the jet nozzle (4) protrudes into a cup-shaped membrane (35) which carries the insertion opening (36) on a pot bottom of its pot shape, and that faces away from the bottom of the pot Peripheral edge of the membrane (35) elastically supported on the jet nozzle (4). Backflow barrier according to claim 12, characterized in that the membrane (35) in the region of the pot bottom of its pot shape, the jet nozzle receptacle (50) in the region of an opening provided in the guide wall (60) opening (64) and seals that the membrane (35 ) has at least one flow opening (65) at the periphery of its pot shape, which connects the interior (66) of the jet nozzle receptacle (50) with the interior (67) of the cup-shaped membrane (35).

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