EP3165684A2 - Domestic water system - Google Patents

Abstract

The present invention relates to a drinking or service water system (1) in a multi-residential buildings having a connected to the public water supply network house connection and connected to the public sewer network sewage pipe, at least one leading only to one of the housing units cold water supply (40), at least one only leading to this residential hot water supply line (42), and at least one arranged in the housing extraction valve for the removal of cold water and hot water, the cold water supply (40) with a leading to the at least one sampling valve of the housing unit cold water discharge (44) and the hot water supply line (42) is connected to a leading to the at least one removal fitting of the residential hot water discharge (46). In order to best regulate pressure fluctuations in the supply network of the building for the individual dwelling units, the present invention provides a pressure compensation element (3) which is associated with the two water outlets (44, 46).

Description

The present invention proposes a solution to a problem existing in the context of domestic water supply. Domestic water supply systems, usually connected to the municipal water supply system via a domestic connection and provided with a sewer pipe to discharge waste water from the house to the public sewer system, have cold and hot water supply lines to at least one residential unit of a building. The building may comprise several residential units, each unit having a cold water supply and hot water supply. Typically, each residential unit comprises several extraction fittings. Such extraction fittings in the drinking water installation are e.g. installed on sinks, bathtubs, shower basins or sinks. Today, so-called mixing valves as extraction valves are common at this point, the input side are connected to a drinking water supply for cold and hot water. On the output side, the water mixed in the valve to an average temperature is led out of the valve. The removal fitting may be a so-called single-lever mixer, which generates water at a predetermined mixing temperature due to the manually set lever position. However, this temperature is not preselected and is not regulated by the valve. Rather, the mixing temperature results from the mixing of two differently tempered individual streams, namely the warm water stream and the cold water stream. The same applies to mixing valves with two separately openable valves, one valve for hot and the other valve is provided for cold water. Although there are also thermostatically controlled valves that adjust by means of a temperature-sensitive element a preset temperature within a certain control accuracy.

However, the aforementioned removal valves are subject to the problem of pressure fluctuations in the supply network. These pressure fluctuations can occur both in the area of the cold water supply and in the area of the hot water supply in the building, depending on how much water is currently taken from the cold water network or the hot water network of the building. Thus, on the input side of a removal fitting cold and hot water side is generally a different and time-varying pressure. The change in pressure in the two networks is not synchronous. For removal fittings without thermostatic control generate such pressure fluctuations immediately significant temperature fluctuations at the output of the sampling valve. These variations are perceived by the user as at least disturbing if not unacceptable. The latter is at least when water removal on a shower head whose water temperature is adjusted by the sampling valve to observe. Thermostatically controlled valves can compensate for these pressure fluctuations to a certain extent. But even here, the temperature is not constant due to pressure fluctuations.

The present invention seeks to provide a solution to this problem.

In view of this, the present invention provides a drinking or service water system having the features of claim 1. The invention comprises a drinking or service water system in a building having several residential units with a connected to the public water supply network and a connected to the public sewer network sewage pipe, at least one leading only to one of the housing units cold water supply of cold water in a residential unit, at least a leading only to these units hot water supply to provide hot water in the residential unit, and at least one suitable for the removal of cold water and hot water trained and arranged in the housing extraction valve fitting, the drainage side drained into a leading to the sewer pipe sewer, the cold water supply with one leading to the housing units cold water drainage and the hot water supply is connected to a leading to the housing units hot water drainage. The discharge for cold water or hot water is usually in the area of the apartment entrance. The corresponding derivatives are usually assigned solely to the apartment, whereas the supply line can also be laid as a supply of several units. According to the invention, the two water outlets are each assigned a pressure compensation element. The installation of the pressure compensation element is preferably carried out so that the pressure compensation element regulates the pressure within the housing unit as a whole, so that there is lower pressure references between the cold and the hot water supply in the entire residential unit or a supply-technical subunit of the housing unit. The pressure compensation element is usually assigned to more than one consumer and regularly provided at a central point of the water supply of the residential unit.

The pressure compensation element has a movable piston element which separates a hot water side and a cold water side. The hot water side communicates with the water drainage for the hot water and the cold water side with the water drainage for the cold water. Such a pressure compensation element is for example from the FR 2 112 845 A5 known. But there are also known pressure equalization elements, which cause a pressure equalization without the use of a piston. Exemplary here is the DE 41 03 194 A1 to call. In it, the pressure compensation via a turbine wheel on the cold water side, which interacts via a shaft with a pump on the hot water side, achieved.

The pressure compensation element according to the invention is usually located at the entrance to the residential unit. Since a water meter is usually provided there, the pressure compensation element is preferably also associated with the two water meters for the cold or hot water. Usually, a water meter is provided in the cold water drain and a water meter in the hot water discharge, and regularly at the entrance to the housing unit. The cold water drainage and the hot water discharge are connected in a conventional manner with at least one, usually several removal fittings within the residential unit. The pressure compensation element associated with the two water meters can be provided upstream or downstream of the water meters in the flow direction. Preferably, an intermediate piece between the water meter and the pressure compensation element at most a tube length of 10 cm and more preferably of at most 7 cm.

Due to the preferred positioning of the pressure compensation element at an entrance to a dwelling or a downstream flow branch, which supplies a functional area within a dwelling, it is preferable to combine the pressure compensation element with shut-off devices. These shut-off devices for shutting off the residential unit as a whole or the subunit within the apartment are preferably assigned directly to the pressure equalizing regulator and provided directly upstream or downstream thereof in the flow direction. Preferably, an intermediate piece between shut-off and pressure compensation element at most a tube length of 10 cm and more preferably of at most 7 cm.

Preferably, in the drinking and service water system, the cold water supply and the hot water supply each with an inlet nozzle and the cold water discharge and the hot water discharge in each case connected to an outlet with a pressure compensation regulator, which has a cylindrical compensation chamber in which a piston member is movably provided on both sides of the piston member each having an inlet opening, wherein the one inlet opening with the cold water supply line and the other inlet opening with the Hot water supply communicates. The piston element constitutes a valve body which, depending on the position of the piston element, displaces at least one of the inlet openings completely or partially.

In particular, the drinking and service water system can preferably be mounted on an entrance of the residential unit, so that the pressure fluctuations can take place before the entry of the cold water into the cold water drain and the hot water into the hot water drain. In this case, the point at which lines for hot and cold water for drinking water supply in the residential unit are transferred from supply lines in the building to the residential unit is to be regarded as the entrance. Often the entrance is located at the point where water meters are located in the housing unit for determining the water consumption of cold and warm water. In this way, a pressure compensation regulator can equalize the pressure of the water for the at least one extraction fitting. Furthermore, in this way, the pressure compensation regulator may be connected upstream of several removal fittings of the residential unit. It can be space for the pressure balance regulator can be saved and the installation of the drinking or domestic water system can be simplified.

Furthermore, a residential unit can also have several cold water supply lines and hot water supply lines. The number of cold water supply lines and hot water supply lines may vary according to the size of the residential unit and / or branches of the supply lines in the residential unit or the arrangement of the leads to the apartment. By arranging a pressure equalization regulator on each of the supply lines, wherein in each case a cold water supply and a hot water supply is connected to a pressure equalization regulator, a pressure equalization can take place before the discharges, so that the cold water or hot water are forwarded to the at least one sampling valve substantially without pressure fluctuations can.

The pressure balance regulator can with the cold water supply, the hot water supply, the cold water discharge and the hot water discharge non-positively, for example by screwing, or cohesively, for example by soldering, welding or gluing. The individual components are connected to each other in such a way that the connections are watertight, so that no water can leak at the connection points. In particular, a seal, for example an O-ring, or a fiber seal, such as hemp or paper, may be arranged at the connection points.

The pressure balance regulator can be mounted on plaster or plaster and provided with a valve to which the cold water drain and the hot water discharge can be fired.

The pressure compensation regulator effects a pressure-controlled control. Hot water flows on one side of the piston into the cylindrical compensation chamber, cold water on the other side. If there is a pressure difference, this is compensated by movement of the piston member. By this movement of the piston member of the thus coupled valve body is provided. The design of the valve body is such that it usually completely or partially laid that inlet opening through which the water flows at the higher water pressure. As a result of this displacement of the inlet opening, a reduction in the fluid pressure in the region of the compensation chamber assigned to this inlet opening takes place. This compensates for pressure differences in the range of the inlet pressures of the two water systems cold / warm by the pressure compensation regulator and by the pressure difference-controlled position of the piston.

The design is very simple, since the pressure compensation control is controlled solely by the acting pressure of the flowing water streams, usually by the pressure difference on the output side.

Usually, the valve body is formed by the lateral surface of a hollow cylindrical piston element. In this piston element of the end face of the piston is effected by a partition wall, from which the hollow cylindrical lateral surface goes off. Usually go on both sides of the partition hollow cylindrical lateral surfaces in the axial direction. The configuration of these lateral surfaces is preferably such that in a position in which one of the inlet openings is completely or at least partially laid by the lateral surface, the other inlet opening usually by a formed in the lateral surface recess with maximum passage opening with the associated inner region of the cylindrical Compensation chamber communicates. So will In this position, care is taken to ensure pressure equalization between the two chambers with maximum efficiency and speed.

In this way, a drinking or service water system can be provided, which can compensate for pressure fluctuations in cold water pipes and hot water pipes for a residential unit.

It is preferred that the cold water drain and / or the hot water drain are connected to a plurality of extraction fittings. In particular, the pressure equalization regulator arranged upstream of the cold water discharge and before the hot water discharge can compensate for the pressure difference such that an additional arrangement of further pressure compensation regulators can be saved before each removal fitting. The cold water discharge and the hot water discharge are usually connected to more than one withdrawal fitting. These removal fittings are located exclusively in the one residential unit. The extraction fittings can be connected via different lengths of piping to the discharge lines. As a result, different pressures can again be generated, which, however, are negligibly small. By arranging a pressure balance regulator before the cold water drainage and the hot water drainage a substantially equal pressure for the connected to the cold water drainage and the hot water discharge extraction valves can be provided so that more pressure balance regulator can be saved within the housing unit. Furthermore, space can be saved for the savings pressure equalization regulator, which can simplify the installation of extraction valves and the drinking or domestic water system.

Preferably, the cold water supply and the hot water supply are each shut off via a closure member. In this way, the inflow of cold water or hot water can be easily interrupted, whereby the safety of the drinking and drinking water system can be increased. For example, can be shut off by the closure member of the inflow of water to replace an end fitting or to replace the burst pipe in a water pipe break.

In a preferred embodiment, the water meters are designed as calibrated water meters and / or as volumetric flow meters. The calibrated water clocks are typically used to determine within a billing period (such as a Year) total amount of water taken. The volumetric flow meters are used to determine the instantaneous water flow through the piping, especially as part of a water damage protection device. For example, if a very high flow rate indicative of water pipe breakage or a small but constant flow indicative of an accidental non-closed stopcock tap or leakage is detected, precautionary measures may be taken, particularly shutting off the associated piping. The volumetric flow meter may preferably be designed to communicate the flow rate by means of electrical signals, for example to an electronic control. Within the scope of the invention, a calibrated water meter and a volumetric flow meter can also be provided in the discharge.

With a view to maximally possible inflow of liquid into the interior of the pressure compensation regulator at maximum open passage between the inlet opening and the inner region of the compensation chamber assigned to this inlet opening, it is preferable to leave a groove at least partially, preferably completely, in the wall of the compensation chamber in an end position of the piston communicates with a at least partially circumferentially extending in the valve body recess. The recess and the groove usually have the same extent in the axial direction, ie in the direction of adjustment of the piston element, ie they are essentially the same width. But at least the recess should be as large as the width of the groove to allow unimpeded entry of water in the groove in the region of the compensation chamber through the recess. The corresponding recess is usually located in the axial direction between the partition and a cylindrical wall portion of the piston element, which completely covers the inlet opening in a closed position. Thus, a plurality of recesses in the circumferential direction are usually provided successively to the maximum entry of water in the open position in the circumferential direction, usually provided distributed uniformly over the circumference of the hollow cylindrical piston element. The webs separating the individual recesses connect the cylindrical wall region to a wall section which is likewise usually completely cylindrical and thus peripherally closed, and which is axially closed by the partition wall. The partition is firmly connected to the hollow cylindrical element. The hollow cylindrical piston element may be rotatable in the cylindrical compensation chamber. Such a rotation affects the Functionality is not usually, and so the hollow cylindrical piston element can be arranged with a circular cross-section in a cylindrical chamber provided correspondingly with a circular cross-section.

The groove recessed in the compensation chamber inside the pressure balance regulator usually extends strictly radially around and includes the inlet opening. The groove may be provided with varying depth, this depth in the region of the inlet opening maximum and opposite thereto may be minimal. Thus, a flow cross section is created, which takes into account the expected decrease of the flow volume in the circumferential direction, starting from the outlet opening.

For constructive simplification of the pressure compensation regulator is proposed according to a preferred embodiment of the present invention to form a valve seat for the valve body directly through a compensation chamber forming housing. At this valve seat, the valve body is in a final position substantially sealingly. In this case, the valve seat is usually formed on both sides of the groove, so that all regularly regularly formed on the housing flow channels for introducing water through the one inlet opening into the compensation chamber are closed by the valve body in the end position.

As already mentioned, the piston element in the interior of the pressure compensation regulator is preferably designed such that in the end position, in which an inlet opening is closed, a valve body formed on the piston element seals against the valve seat of one of the inlet openings, while at the other inlet opening at least one partially circumferentially on the hollow cylinder extending recess communicates with said other inlet port. In other words, in the said end position, one of the inlet openings is completely closed, while the other of the inlet openings is maximally continuous to the interior of the hollow cylinder, and accordingly a maximum flow of water through this inlet opening is possible.

Regularly the mobility of the piston limiting stops are provided in the interior of the pressure equalizing sailor. These stops are usually designed so that they specify the said end positions. In one end position, one of the inlet openings is closed, whereas the other inlet opening communicates maximally with the interior of the hollow cylinder. In another end position, in another Stop effectively specifies the position of the hollow cylinder, communicates the other of the inlet openings with maximum passage opening through the hollow cylinder with the interior of the hollow cylinder, whereas the other inlet opening is closed.

According to a preferred development of the pressure compensation regulator, the outlets are located outside a region swept by the piston and the valve body. Thus, the effective flow cross section between the pressure compensation chamber and the two outlets usually remains unaffected by the respective position of the piston and thus of the valve body. The inlet openings are preferably within the swept area.

According to a preferred embodiment of the pressure compensation regulator, a piston element is provided with a hollow cylinder passing through a partition wall approximately in the middle. On both sides of the dividing wall, this hollow cylinder has in each case a circumferentially continuous closing body, which is designed, for example, for sealing engagement with the valve seat, and a passage region provided between the dividing wall and this closing body, which has at least one recess extending at least partially around it. In this case, the passage region is usually immediately adjacent to the closure body. The piston element is so far formed substantially symmetrically to the partition wall. In a corresponding way symmetrically thought to a symmetry axis are the inlet and outlet openings. By this configuration, a faulty mounting can be avoided. It does not matter in this embodiment how the piston element is inserted into the cylindrical recess.

In view of this and also to simplify the production of the pressure compensation regulator, it is proposed with a further preferred development to form the housing by means of two essentially identical housing elements, each of which forms an inlet and an outlet connection. Thus, these housing parts can be prepared in the same molds and machined exciting after the same process, which significantly simplifies the production. In this case, the inlet and outlet nozzles of the housing elements usually have internal or external thread, which have usual diameters in the sanitary technology for households to connect conventional lines of a domestic water installation to the pressure equalization regulator according to the invention. The inlet stubs usually extend radially to the cylindrical compensation chamber and thus at right angles to the direction of movement of the piston and the valve body. This prevents the pressure on the input side from affecting the position of the piston element. Although the outlet can also go radially from the cylindrical compensation chamber. The design should, however, be such that the pressure exerted on the outlet side acts directly on the piston in order to effectively pressure control this piston. Thus, the inlet ports are usually within a swept area of the piston and the valve body, whereas the outlet ports are outside this range.

The invention further relates to a water transfer system for a drinking or service water system, which may be formed or further developed as described above. In the water transfer system closing organs for the cold water supply and the hot water supply, the pressure compensation regulator and the water meters for the cold water discharge and the hot water discharge are combined into one module. Preferably, the housing of the closure members are directly connected to the housing of the pressure balance regulator and these preferably directly to the housing of the water meter.

The water transfer system can essentially consist of a single assembly, which can be mounted as a whole. The sub-elements of the assembly may be mechanically connected to each other, wherein the mechanical connection can be made directly through the assembly itself. The summary of the sub-elements to an assembly may facilitate the installation of the water transfer system in a residential unit of a building. In this case, the water transfer system can be mounted both at the completion of the residential unit as well as subsequently. The water transfer system is installed at the central supply lines for cold water and hot water of the residential unit.

In this way, a water transfer system with a compact and simple connection technology for a drinking water or service water system can be made available, so that space can be saved.

It is preferred that the water transfer system include a water transfer system housing having an opening or door or a removable lid for receiving the assembly. As a result, an implementation of assembly, maintenance, repair or cleaning work is enabled and / or facilitated. The water transfer system housing can be firmly connected to the assembly, or the assembly is loosely arranged in the housing.

Preferably, the Wasserübernahmesystemgehäuse is designed for attachment to or under plaster. Alternatively, the water transfer system may be configured as a pre-wall installation. The arrangements on plaster or as a pre-wall installation can be inexpensive and facilitate subsequent installation and facilitate. An arrangement under plaster can be space-saving and visually inconspicuous.

According to a preferred embodiment of the present invention, the pressure compensation element is provided for itself or together with the cold water and the hot water side associated closure member and / or associated water meters in a foamed assembly housing. In this way, a simple assembly and handling is possible, especially if the pressure compensation element is combined with other components.

The invention further relates to a residential unit for a building comprising several residential units. The housing unit comprises an apartment entrance, wherein at the entrance to the apartment a water transfer system, which may be designed or developed as described above, is arranged. In this way, the at least one sampling valve in the housing unit, a substantially equal pressure of the cold water and the hot water are provided, space for a pressure compensator in the vicinity of the valve can be saved.

It is preferable that the housing unit comprises a plurality of water transfer systems, which may be formed or developed as above. In particular, the residential unit may comprise a plurality of cold water supply lines and hot water supply lines, which are each connected to a pressure equalization regulator in order to provide the discharges a substantially equal water pressure available.

• Fig. 1 ein Ausführungsbeispiel eines Teils eines Trink- und Brauchwassersystems in einer perspektivischen Seitenansicht; und
• Fig. 2 das Ausführungsbeispiel nach Fig. 1 in einer perspektivischen Schnittansicht.

The invention will now be described by way of example with reference to the accompanying drawings with reference to preferred embodiments, wherein the features shown below, both individually and in combination may represent an aspect of the invention. Show it:

• Fig. 1 an embodiment of a portion of a drinking and domestic water system in a perspective side view; and
• Fig. 2 the embodiment according to Fig. 1 in a perspective sectional view.

In FIG. 1 is a drinking or domestic water system 1 shown, which can be installed in a building, not shown, several housing units. The drinking or waste water system is connected to a not shown connected to the public water supply network house connection and a not shown connected to the public sewer network sewage pipe, and includes only one of the housing units leading cold water supply 40 providing cold water in a residential unit and only one leading to this units hot water supply 42 for the provision of hot water in the unit. In the residential unit at least one not shown suitable for the removal of cold water and hot water designed removal fitting is arranged, the drainage side dewatering in a leading to the sewer pipe sewer.

The cold water supply line 40 is connected to a leading to the residential units cold water drainage 44 and the hot water supply line 42 with a leading to the residential units hot water discharge 46. The cold water discharge 44 and the hot water discharge 46 are connected to the at least one extraction valve. The cold water discharge 44 and / or the hot water discharge 46 may be connected to a plurality of extraction fittings. The cold water supply line 40 and the hot water supply line 42 can each be shut off via a closure member 48. The water meters are designed as calibrated water clocks 50. In the cold water drainage 44 and in the hot water discharge 46, a water meter 30 is provided in each case.

Fig. 2 illustrates a perspective sectional view of the embodiment Fig. 1 and illustrates in particular details of a pressure balance regulator, which in the FIGS. 1 and 2 designated by reference numeral 3. It can be seen that the cold water supply line 40 and the hot water supply line 42 are each connected to an inlet connection 28 and the cold water discharge 44 and the hot water discharge 46 are each connected to outlet connection 38 of the pressure compensation regulator 3. The connection is done by screwing. As can be seen, a housing 2 of the pressure compensation regulator 3 is directly connected to the housing the water meter 50 on the one hand and directly connected to the housing of the closure member 48 on the other.

The aforementioned housing 2 of the pressure compensation regulator 3 is formed from two identically designed housing elements 4. These housing elements 4 are connected to each other via flanges 6 formed thereon and enclose a cylindrical compensation chamber 8 formed between stops 10 which define a region 14 swept by a piston element 12.

The piston element 12 is formed substantially hollow cylindrical with a circular cross-sectional area and penetrated centrally by a partition wall 16. The piston member 12 forms the end of a circumferentially continuous closure body 18, which is formed by the circumferential, a total of a valve body 19 forming walls of the hollow cylinder. Between this closure body 18 and the partition wall 16 there is provided a passage region 20 with a plurality of circumferentially extending recesses 22 which are separated from one another by axial webs 24. Between the respective passage areas 20 on both sides of the partition wall 16 and this partition wall 16 is again formed by the piston member 12 a continuous hollow cylindrical region from which the partition wall 16 protrudes and against which the partition 16 is fixed inside sealing.

The FIG. 2 shows the piston member 12 in a first end position. In this first end position, the piston member 12 in the FIG. 2 displaced maximally to the left and is against the local stop 10, which can be seen in the figure 3 only by a light edge between the housing 2 and the piston member 12. In this end position, the passage area 20 communicates on the left side of the dividing wall 16 with an inlet opening designated by reference numeral 26, which in the present case is the inlet port for warm drinking water. There, drinking water is at the pressure p_W_E. On the right side of the partition wall 16, the housing 2 forms a further, also designated by reference numeral 26 inlet opening. At this other inlet port 26 is cold water at the pressure p_K_E. The two inlet openings 26 communicate with inlet ports 28, which are each formed integrally on the associated housing elements 4. Between these inlet ports 28, the housing elements 4 each form grooves, in which seals 30 are inserted, which seal the housing 2 relative to the outer periphery of the piston element 12. In every Position of the piston member 12 include these seals 30, the partition 16 between them, so that a passage of fluid is prevented by a marked with reference numeral I left area of the compensation chamber 8 in the other, right provided area II.

In the FIG. 2 is denoted by reference numeral 32, an annular groove which surrounds the respective inlet opening 26 radially and receives in it. The axial extent of the annular groove 32 corresponds to the axial extension of the recess 22. Adjacent to this annular groove 32 is formed by a suitable fit between the piston member 12 and the cylindrical compensation chamber 8, a valve seat 34. In the first end position shown on the valve seat 34, the closing body 18 provided on the right is in the form of a seal, so that the inlet opening 26 assigned to the second area II is closed.

Each housing element 4 forms marked with reference numeral 36 Auslausöffnungen, which are provided radially from the cylindrical compensation chamber 8, but axially behind the stops 10 and thus are not swept by the movement of the piston member 12. The outlet openings 36 each lead to outlet nozzle 38, which are each integrally formed on the associated housing elements 4. At the left in the figure left outlet 36 hot water is discharged at the pressure p_W_A in the direction of a removal fitting, not shown. At the right outlet nozzle 36, cold water is discharged at the outlet pressure p_K_A.

As the description shows, in the embodiment shown drinking cold water flows from above on the right side into the fitting according to the invention, ie the pressure compensation regulator 3; the domestic hot water according to the left side. The drawing illustrates the position of the piston member 12 at unequal pressures on the cold water and the hot water side. The two inlet pressures p_W_E and p_K_E do not change the position of the piston element 12, since these flow radially relative to the direction of movement of the piston element 12. The pressure is applied radially on the piston outside. Thus, pressure differences on the input side do not affect the position of the piston element 12. In contrast, however, pressures on the output side p_K_A or p_W_A very well have an effect on the position of the piston element 12, since these pressures act in the flow direction behind the valve seats 34 and thus directly on the partition wall 16.

In the representation according to the FIG. 2 It can be assumed that the corresponding pressure p_K_A is greater in the region II than the pressure p_W_A. Thus, the piston element 12 is displaced into the end position shown in FIG. 3 and against the left stop 10. It follows that the closure body 18 bears sealingly against the valve seat 34 and the flow is prevented with drinking cold water in the right part of the cylindrical compensation chamber 8. On the left side flows with maximum passage of domestic hot water into the cylindrical compensation chamber 8, especially in the interior of the hollow cylindrical piston element 12 a. Since no drinking cold water can be tracked from the inlet side, the pressure on the outlet side of the drinking cold water will inevitably decrease, with the result that the relative pressure in the first region I displaces the piston element 12 to the right and initially opens the inlet opening 26 for the hot water cold becomes. From the inlet side, cold water then flows through the inlet opening 26 into the second region II of the cylindrical compensation chamber 8, until a pressure equilibrium is established and both cold and hot water through the passages 20 of the valve body associated with the regions I and II 19 can flow or but the piston member 12 abuts against the other or the previously effective stop 10 to again one of the inlet openings 36 and the associated annular groove 32 to close. Due to the configuration of the annular groove 32, water-in the illustrated exemplary embodiment hot drinking water-does not only flow through the recess 22 which directly overlaps the inlet opening 26. Water can also flow through the other, distributed circumferentially provided recesses 22 which are deposited by the annular groove 32.

As shown, the pressure balance regulator 3 offers a simple and effective way to compensate for pressure differences between supplied cold and hot water flow. The pressure compensation regulator 3 ensures that the requirement for equal pressures on the outlet side of the pressure compensation rule fitting is taken into account. Accordingly, a fitting connected immediately downstream of the pressure compensating regulator 3 with the discharges 44, 46 can keep the temperature preset by the user, since it is not exposed to time-varying fluid pressures on the cold water and / or hot water side.

The compensation regulator 3 may be part of an assembly for a water transfer system for a drinking or service water system 1. The assembly includes the closure members 48 for the cold water supply 40 and the hot water supply 42, the pressure balance regulator 3 and the cold water drainage 42 and the hot water drainage 46. The water delivery system may include a water transfer system housing having an opening for receiving the assembly for easy maintenance and repair. The water transfer system housing can be mounted on plaster.

That in the FIGS. 1 and 2 illustrated drinking or service water system 1 or the water transfer system described above can be arranged in a residential unit for a building comprising several residential units. The housing unit may comprise several water transfer systems with several supply lines from the public water supply network.

LIST OF REFERENCE NUMBERS

1

Drinking and process water system

2

casing

3

Pressure difference regulator

4

housing element

6

flange

8th

cylindrical compensation chamber

10

attack

12

piston element

14

swept area

16

partition wall

18

closure body

19

valve body

20

Passband

22

recess

24

web

26

inlet port

28

inlet port

30

poetry

32

ring groove

34

valve seat

36

outlet

38

outlet

40

Cold water supply line

42

Hot water supply

44

Cold water drainage

46

Warm water drainage

48

closure member

50

water meter

I.

1st area of the cylindrical compensation chamber

II.

2nd area of the cylindrical compensation chamber

Claims (15)

Drinking water or service water system (1) in a multi-residential buildings with
a domestic connection connected to the public water supply network and a sewage pipe connected to the public sewage network, at least one cold water supply line (40) leading to only one of the residential units for providing cold water in the one residential unit, - At least one leading only to this housing hot water supply line (42) providing hot water in the residential unit, and - At least one suitably designed for the removal of cold water and hot water and arranged in the housing unit removal fitting, the drainage side dewatered in a leading to the sewer pipe sewer, and - Wherein the cold water supply line (40) is connected to a leading to the at least one extraction fitting of the housing unit cold water drainage (44) and the hot water supply (42) with a leading to the at least one extraction valve of the housing unit hot water discharge (46) characterized in that the two water outlets (44, 46) is associated with a pressure compensation element (3). Drinking or service water system (1) according to claim 1, characterized in that a water meter (50) in the cold water discharge (44) and / or a water meter (50) in the hot water discharge (46) is provided and the cold water discharge (44) and the Hot water discharge (46) are connected to the at least one removal fitting and that the two water meters (50) is associated with the pressure compensation element (3). Drinking or service water system (1) according to claim 1 or 2, characterized in that the cold water supply line (40) and the hot water supply line (42) respectively with an inlet port (28) and the cold water discharge (44) and the hot water discharge (46) are each connected to outlet (38) of a pressure balance regulator (3) having a cylindrical compensation chamber (8) in which a piston member (12) arranged to be movable is on both sides of the piston member (12) each provided with an inlet opening (26), wherein the one inlet opening (26) with the cold water inlet (40) and the other inlet opening (26) with the hot water supply line (42) communicates, and Piston member (12) a valve body (19) provides, depending on the position of the piston member (12) at least one of the inlet openings (26) completely or partially laid. Drinking or service water system (1) according to any one of claims 1 to 3, characterized in that the cold water discharge (44) and / or the hot water discharge (46) are connected to a plurality of arranged in the housing extraction valves. Drinking or process water system (1) according to one of claims 3 to 4, characterized in that the pressure compensating regulator (3) inside a at least partially circumferentially in the wall of the compensation chamber (8) recessed groove (32) which in an end position of the piston element (12) with a at least partially circumferentially in the valve body (19) extending recess (22) communicates. Drinking or process water system (1) according to one of claims 3 to 5, characterized in that a housing (2) of the pressure compensation regulator (3) the compensation chamber (8) and a valve seat (34) for the valve body (19) is formed on the the valve body (19) bears in an end position substantially sealing. Drinking or process water system (1) according to claim 6, characterized in that the valve seat (34) is formed on both sides of the groove (32) in the pressure balance regulator (3). Drinking or process water system (1) according to one of claims 3 to 7, characterized in that in the pressure compensating regulator (3) the piston element (12) extends at least partially on the valve body (19) and with the inlet opening (26) in one End position communicating outlet opening (36) and one in this end position substantially sealingly against the valve seat (34) the other inlet opening (26) adjacent closure body (18), wherein in the pressure balance regulator (3) the outlet openings (36) outside of the closure body (18) and the valve body (19) over-painted area (14) are arranged. Drinking or process water system (1) according to claim 8, characterized in that in the pressure compensating regulator (3), the piston element (12) is formed as an approximately centrally from a partition (16) interspersed hollow cylinder on both sides of the partition wall (16) respectively a circumferentially continuous closure body (18) and in each case one between the partition wall (16) and the closure body (18) and adjacent to the closure body (18) provided passage area (20) having an at least partially circumferentially extending recess (22). Drinking or process water system (1) according to one of claims 6 to 9, characterized in that the housing (2) of the pressure compensation regulator (3) is formed by two substantially identically formed housing elements (4), each of which has an inlet port (28 ) and an outlet port (38) form. Drinking or service water system (1) according to one of claims 1 to 10, characterized in that the pressure compensation element (3) is provided for itself or together with the cold water and the hot water side associated obturator and / or associated water meters in a foamed assembly housing. Water transfer system for a drinking or service water system (1) according to one of claims 5 to 11, characterized in that the closure members (48) for the cold water supply (40) and the hot water supply (42), the pressure compensation regulator (3) and the water meter (50 ) of the cold water discharge (42) and the hot water discharge (46) are combined to form a module. Water delivery system according to claim 12, characterized in that the water transfer system comprises a water transfer system housing having an opening or a door or a removable cover for receiving the assembly. Housing unit for a building comprising several residential units, characterized in that the housing unit comprises a housing entrance, wherein at the entrance to the apartment a drinking or service water system (1) according to one of claims 1 to 11 or at least one water transfer system according to one of claims 12 or 13 is arranged , Housing unit according to claim 14, characterized in that the housing unit comprises a plurality of water transfer systems according to one of claims 15 to 18.

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