DE102024111354A1 - Sanitary installation and drinking water supply station - Google Patents

Abstract

A sanitary installation (1) comprising a hot water component for providing hot water, in particular domestic hot water, for at least one tap (2), at least one tap (2) connected to the hot water component, at least one remote control unit (3) for requesting a target temperature and/or a target volume flow for the at least one tap (2), and at least one control device (16) structurally separate from and coupled to the remote control unit (3) for setting an actual temperature and/or an actual volume flow from the hot water component to the at least one tap (2) based on the requested target temperature and/or the requested target volume flow is disclosed. Furthermore, a drinking water supply station (10) suitable for use in such a sanitary installation (1) is disclosed.

Description

The present invention relates to a sanitary installation for providing hot water, in particular hot drinking water, for at least one tap, as well as a drinking water supply station suitable for use in such a sanitary installation.

In conventional plumbing systems, cold water and hot water are typically supplied to different taps via separate supply lines. Depending on the type of hot water source, the hot water supplied can be either domestic hot water or process water from an external heat source, which is not immediately suitable for drinking. The cold water, especially domestic cold water, and the hot water are mixed directly at the tap, typically via a mixer tap, to set the desired temperature of the drawn water.

Plumbing installations of the type described above have a number of disadvantages. For example, the above-mentioned approach requires an extensive piping network and the provision of mixer taps for each tap. Furthermore, there is a risk of scalding if the hot water is provided at a high temperature and dispensed unmixed or mixed in the wrong proportions. Finally, contamination of cold drinking water with potentially undrinkable hot water is possible.

An improved concept for a sanitary installation is disclosed which overcomes the above-mentioned problems in whole or in part and enables new possibilities for supplying one or more taps with hot water.

The subject matter of the disclosure is, inter alia, a sanitary installation. The sanitary installation comprises a hot water component for providing hot water, in particular domestic hot water, for at least one tap, at least one tap connected to the hot water component, at least one remote control unit for requesting a target temperature and/or a target volume flow for the at least one tap, and at least one control device, structurally separate from and coupled to the remote control unit, for setting an actual temperature and/or an actual volume flow from the hot water component to the at least one tap based on the requested target temperature and/or the requested target volume flow.

According to one aspect of the present invention, hot water, in particular domestic hot water, is provided at a predetermined target temperature and/or a predetermined target flow rate by a control device separate from the actual tap. This eliminates the need for a mixer tap in the area of the tap. At the same time, it is possible to connect the tap to the control device via a single pipe. Particularly when the control device is located in close proximity to the hot water component, the number and length of the required pipes are significantly reduced. Furthermore, this makes it possible to design the pipes leading to the respective taps without pressure. Therefore, only a relatively simple remote control unit, for example, an electronic remote control wirelessly integrated into the system, is required in the area of the respective tap. Furthermore, it is possible to design and install the remote control unit independently of the actual outlet fitting. This allows for considerably greater design flexibility, particularly when designing aesthetically pleasing fixtures or bathroom furnishings. In addition, the corresponding functional units can be designed to be particularly robust and thus vandal-proof if required, for example when installed in public spaces.

Optionally, the at least one control device is integrated into the hot water component or coupled to it. The hot water component only provides hot water when requested by at least one remote control unit. For example, the hot water component can be configured to provide hot water at the requested target temperature. Alternatively or additionally, cold water, in particular drinking cold water, is provided at the at least one tap if no hot water is requested by the at least one remote control unit.

Such controls can reduce the primary energy consumption for hot water provision. In particular, it is no longer necessary to maintain hot water at a fixed target temperature regardless of consumption or to circulate it through a circulation line. Instead, hot water is preferably provided by the hot water component only when it is actually requested at at least one connected tap. This can increase the overall energy efficiency of the plumbing system.

Optionally, the plumbing installation comprises a plurality of taps connected to the hot water component, a plurality of remote control units for requesting a target temperature and/or a target flow rate for each of the plurality of taps, and a plurality of control devices for setting an actual temperature and/or an actual flow rate from the hot water component to each of the plurality of taps based on a target temperature and/or a requested target flow rate requested for the respective tap. The hot water component is configured to provide drinking water at the highest requested target temperature.

Because the hot water is generated and provided centrally or jointly for a number of draw-off points, it is possible and sensible to regulate the temperature of the hot water provided according to the highest current demand. The temperature of the hot water for the remaining draw-off points can then be reduced by adding cold drinking water, for example to avoid the risk of scalding. The temperature of the hot water provided can be dynamically regulated according to the requirements of the respective draw-off point. In the case that often occurs in practice, where only one of a number of draw-off points is used at the same time, it is always possible, for example, to set the drinking water to the temperature according to the draw-off point currently in use, so that the above-mentioned advantages in terms of energy savings are also achieved in an installation with several centrally supplied draw-off points.

Optionally, the hot water component is connected to each of the at least one tap via a single pipe. In particular, a direct line from a control device assigned to the respective tap to the tap can be used, which is depressurized when the respective tap is not in use. In this way, the provision of separate cold water pipes and hot water pipes can be dispensed with. Another advantage is that the risk of water damage is reduced if the water supply is already prevented at a common distribution point, for example, within the apartment, and not only in the area of the respective tap. For example, if a danger is detected, all taps can be centrally shut off and thus all pipes can be depressurized. Finally, in this configuration, the provision of any shut-off devices in the area of the tap itself can be dispensed with, which further increases the possibilities for the aesthetic design of the respective tap.

Optionally, the hot water component and the at least one control device are structurally integrated into a decentralized drinking water supply station, in particular an apartment station connected between a central building installation and an apartment-internal sanitary installation. In this way, practically all components of the sanitary installation, with the exception of the respective taps and their supply lines, can be integrated into a single, compact unit. In particular, it is possible to integrate all active control components, such as in particular all flow regulators, into such a drinking water supply station. This facilitates the installation and maintenance of all relevant components of the sanitary installation by a specialist without requiring access to other parts of an apartment or other building section.

Optionally, at least one remote control unit and the at least one control device are coupled to each other via a wireless radio connection and/or a bus connection, in particular an RS485 MODBUS connection. Such connections can be easily implemented via radio or a possibly already existing building installation bus, thus enabling the integration of the plumbing installation into other components of an intelligent building installation in the sense of a so-called smart home.

Optionally, the at least one tap and the at least one remote control unit are arranged in a wet room, in particular a shower cubicle. This has the additional advantage of avoiding bulky fixtures within the wet room. Depending on the water quality, problems caused by the arrangement of pipes and mixer taps for hot water within the wet room, particularly with regard to calcification, can also be avoided.

The disclosure further relates to an improved drinking water supply station, which is particularly suitable for use in a sanitary installation of the type mentioned above. The drinking water supply station comprises a hot water component for providing hot drinking water for at least one tap, at least one drinking water connection for connecting the drinking water supply station to a tap, at least one interface for receiving a request signal from a remote control unit structurally separate from the drinking water supply station, and at least one control device for setting an actual temperature and/or an actual volume flow for the at least one drinking water connection based on the request signal.

Such a drinking water supply station comprises all essential components for the remote-controlled provision of hot drinking water for one or more taps, for example a residential installation.

• - einem Wasser-Wasser-Wärmetauscher, der primärseitig mit einer externen Wärmequelle und sekundärseitig mit einer Trinkwasserversorgungsleitung und der wenigstens einen Regelvorrichtung verbunden ist;
• - einen hydraulisch zwischen die externe Wärmquelle und den
• - Wasser-Wasser-Wärmetauscher geschalteten Durchflussregler; und eine Steuerkomponente, wobei die Steuerkomponente dazu eingerichtet ist, den Durchflussregler basierend auf dem Anforderungssignal derart anzusteuern, dass an dem wenigstens einen Trinkwasseranschluss Trinkwarmwasser mit einer angeforderten Solltemperatur bereitgestellt wird.

Optionally, the hot water component includes the following:

• - a water-water heat exchanger which is connected on the primary side to an external heat source and on the secondary side to a drinking water supply line and to the at least one control device;
• - a hydraulically connected between the external heat source and the
• - A flow controller connected to a water-to-water heat exchanger; and a control component, wherein the control component is configured to control the flow controller based on the request signal such that hot drinking water with a requested target temperature is provided at the at least one drinking water connection.

By using, among other things, a water-to-water heat exchanger, a secondary drinking water installation can be completely hydraulically separated from a primary heat source. This makes it possible, for example, to use hot water generated by a heat pump or a solar thermal system that does not meet the hygienic requirements for drinking water to generate domestic hot water. At the same time, the control component and flow controller can easily regulate the desired target temperature for the ready-to-use domestic hot water.

Optionally, the hot water component further comprises an electric reheating unit. The control component is configured to control the flow controller and the electric reheating unit based on the request signal such that hot drinking water at a requested target temperature is provided at the at least one drinking water connection. The provision of an additional electric reheating unit is particularly useful if the target temperature requested at the respective taps is regularly higher than the flow temperature of the external heat source. For example, it may be useful to integrate an electric instantaneous water heater into the drinking water supply station to provide hot drinking water at a temperature of 40 to 60 °C if the sanitary installation is supplied by a heat pump with a flow temperature of, for example, only 35 to 45 °C. In this way, it is possible to operate the entire sanitary installation and the drinking water supply station contained therein at a relatively low, energy-saving flow temperature. Only in the rather rare case that a significantly higher target temperature is requested at a tap is the electric reheating unit activated, thus reducing overall energy consumption.

Optionally, the electric reheating unit is hydraulically connected between the external heat source and the water-to-water heat exchanger. The control component is configured to activate the electric reheating unit only when the flow temperature of the external heat source is insufficient to provide hot water at the required target temperature to at least one drinking water connection.

Optionally, the control component is configured to control the flow controller and, optionally, an electrical reheating unit such that the water-to-water heat exchanger is briefly heated, particularly at regular intervals, to a predetermined temperature, particularly a temperature of at least 60 °C. Such a control enables automatic disinfection of the drinking water supply station, for example, to counteract Legionella contamination.

Optionally, the drinking water supply station has a plurality of drinking water connections for connecting the drinking water supply station to a corresponding plurality of taps and a corresponding plurality of control devices for setting an actual temperature and/or an actual volume flow for the respective drinking water connection based on an associated request signal.

The sanitary installations and drinking water supply stations described above enable a variety of innovative application scenarios in the area of hot water supply for a building or part of a building, in particular for a self-contained apartment.

In particular, water, whether cold drinking water or hot drinking water, can only be supplied to or delivered to a corresponding tap when a user actually requests the supply of water, especially hot water. This can be done, for example, by pressing an electronic request element, such as a button, in the area of the tap. This allows, as explained above, a pressure-free design of the connecting pipes. This also makes it possible to supply water to all taps connected to the hot water component. points centrally and to prevent them if necessary and to dispense with the provision of mixing valves and/or shut-off valves at the individual tap points.

At the same time, the water is only heated when explicitly requested. By providing hot water on demand, especially domestic hot water, preferably at a specific desired temperature, the energy efficiency of the entire installation is significantly increased, for example, by 10% compared to an installation where hot water is always kept in a circulation line at the maximum required temperature.

Furthermore, by deliberately separating the corresponding request signals from one or more remote control units and associated control devices, a highly flexible overall system can be created. For example, profiles of individual taps can be taken into account, limiting a controllable temperature range or volume flow range to a range tailored to the respective tap. This can reduce water consumption and also reduce the potential risk of scalding.

By using a water-to-water heat exchanger in conjunction with a few individual or single-pipe lines, the total volume of hot water stored in the plumbing system can be significantly reduced. This makes it possible, in particular, to reduce the total volume to the limits prescribed for hygiene reasons, for example, three liters, thus reducing the risk of contamination of the plumbing system and the overall effort required for disinfection.

The demand-based request and provision of drinking water enables easy integration with various heat sources, especially particularly efficient alternative heat sources such as heat pumps or solar thermal systems with low flow temperatures.

The provision of only a single supply line for each tap point significantly reduces the installation effort, both in terms of material costs and labor time.

Individual exemplary embodiments of sanitary installations and drinking water supply stations are described in detail below. However, it should be noted that the aforementioned advantages and aspects of the invention can also be implemented independently of one another. For example, relocating the control of a desired volume flow to a drinking water supply station is also useful if the provision of hot water is not required for a specific tap. Conversely, the demand-based provision of hot water at a predetermined target temperature can also be useful in sanitary installations where the respective taps are designed in a conventional manner, i.e., with an existing mixer tap.

Short description of the characters

• 1 shows a schematic representation of a sanitary installation.
• 2 shows a schematic representation of a drinking water supply station.
• 3A and 3B shows possible designs of remote control units.

For the sake of clarity, the same reference numerals are used in the figures for identical or similar components of different embodiments. This does not mean that the respective component is identical in the different embodiments. Furthermore, alphabetic suffixes are added to the reference numerals to better distinguish between multiple similar components. If the alphabetic suffix is omitted, the corresponding statements generally refer to all instances.

Description of implementation examples

1 schematically shows a sanitary installation 1 with a plurality of taps 2. In the exemplary embodiment, this is, for example, an internal sanitary installation of a typical apartment with, for example, a bathroom and a kitchen. In particular, a first tap 2a can be an outlet fitting of a kitchen sink. The further taps 2b to 2e can be different taps in the area of a bathroom, for example an outlet fitting of a hand basin, an outlet fitting in the area of a bathtub, and two different shower fittings of a shower cubicle 4.

How 1 As can be seen, there is a corresponding remote control unit 3 near each tap 2. The remote control units 3 are functional, for example, by radio, via a dedicated cable connection or via a shared communication bus, coupled to a drinking water supply station 10. The taps 2 are also hydraulically coupled to the drinking water supply station 10 via pipes 5. There is generally no direct connection between the individual taps 2 and the remote control units 3.

For the first three taps 2a to 2c, there is a direct assignment between the three taps 2a to 2c and three corresponding remote control units 3a to 3c. However, for the remaining two taps 2d and 2e in the area of shower cubicle 4, there is no such one-to-one assignment. Instead, the two taps 2d and 2e are controlled via a common, fourth remote control unit 3d.

The drinking water supply station 10 forms an interface between supply lines 7 to 9 of a 1 general building installation not shown and the 1 The drinking water supply station 10 connects the apartment installation shown to the taps 2. Therefore, it is also referred to below as a heat interface unit (HIU). In other words, the drinking water supply station 10 represents a central component within the apartment's internal sanitary installation 1, in particular for all of the taps 2, and a decentralized component with respect to the building installation or a central heat source.

The heat interface unit is designed to hydraulically separate a building-side hot water installation from an apartment-internal drinking water installation. For this purpose, the heat interface unit comprises, as described in detail below, a 1 not shown water-water heat exchanger, by means of which heat energy can be transferred from the building installation to the apartment installation.

On the inlet or building side, the drinking water supply station 10 is connected to a corresponding external heat source of the building via a supply line 7 and a return line 8. In addition, the drinking water supply station 10 is connected to a drinking water source via a drinking water pipe 9.

On the output side, the drinking water supply station 10 provides four connections for connecting the taps 2a to 2e. For the first three taps 2a to 2c, a dedicated pipe 5 is provided between the drinking water supply station 10 and the corresponding taps 2a to 2c. In the case of the shower installation, in the illustrated embodiment, a common pipe 5 is routed to the shower cubicle 4, where it is divided into the two taps 2d and 2e via a branch 6.

In the exemplary embodiment, switching between the two tapping points 2d and 2e can be effected via the branch 6, for example, by a mechanical control element, such as a two-way valve. Alternatively, it is also possible to control a corresponding electronically controllable switching valve via the corresponding remote control unit 3d. Of course, it is also possible, unlike in the 1 shown, two separate pipelines 5 between the drinking water supply station 10 and the taps 2d and 2e, as will be shown later on the basis of the 2 and 3B described.

Firstly, it should be noted that each of the 1 The taps 2 shown are connected to the drinking water supply station 10 only by a single pipe 5. In the 1 In the connection diagram shown, there are neither circulation pipes, in particular for the circulation of hot water, nor separate cold and hot water pipes to the individual taps 2.

In addition, the taps 2 can optionally be implemented as pure outlet fittings without a hydraulic shut-off function. While it is generally possible to design taps 2a and 2b, for example, as conventional taps with corresponding shut-off valves, this is not required for the function of the sanitary installation 1, as will be shown below with reference to the 2 executed.

2 shows a schematic of the internal structure of the drinking water supply station 10. As previously mentioned, the drinking water supply station 10 comprises a water-to-water heat exchanger 11, or heat exchanger (HX), which hydraulically divides the station 10 into a primary heating zone 12 and a secondary drinking water zone 13. There is no water exchange between the primary heating zone 12 and the secondary drinking water zone 13. Thus, the source of the hot water flowing through the primary heating zone 12 in the flow line 7 is irrelevant for the quality of the water supplied at the taps 2a to 2e.

The primary heating area 12 contains a primary flow regulator 14 and an optional reheater 15. The reheater 15 can be, for example, an electric instantaneous water heater. In the exemplary embodiment, two control devices 16a and 16b are arranged in the secondary drinking water area 13, which, for example, can be connected to the remote control units 3a and 3d. according to 1 Of course, further control devices can be present in the secondary drinking water area 13, for example for the remote control units 3b and 3c. For reasons of simplicity, these are not shown in the 2 However, this is not shown. The first control unit 16a is a control unit for a single dispensing point, for example, dispensing point 2a.

The second control unit 16b is a control unit for connecting two taps 2, such as in particular the taps 2d and 2e of the shower cubicle 4.

In the described embodiments, all active components of the drinking water supply station 10 are integrated into a housing 20 or arranged on a common installation frame. The active components are controlled by a central electronic control unit 17, in English an Electronic Control Unit (ECU). In the described embodiment, the remote control units 3 are coupled to the electronic control unit 17 by means of a radio connection directly or indirectly, for example via a base station coupled to the drinking water supply station 10. Alternatively, a 2 A wired interface (not shown) may be provided. For example, it is possible to provide a corresponding electrical interface on each of the control devices 16a and 16b for connecting the corresponding remote control units 3a and 3d. In this case, the exchange of control signals can also take place from the individual control devices 16 to the control device 17 and not, as in the 2 shown in the reverse direction.

As in the 2 As shown, the drinking water supply station 10 comprises a first connection 21 for connection to the flow line 7 of the building installation. For example, the drinking water supply station 10 can be connected to a hot water supply line of a heat pump with a flow temperature of 38 to 45 °C. The amount of hot water supplied to the water-water heat exchanger 11 via the first connection 21 is controlled by the primary flow controller 14 using suitable control signals from the control device 17. The more heat energy is required in the secondary drinking water area 13, the further the primary flow controller 14 is opened. If no hot water is required on the secondary side, the control device 17 generally closes the primary flow controller 14 completely. For example, with a primary flow temperature of 45 °C and a cold drinking water temperature of 15 °C, a secondary hot water flow of 15 °C (flow controller 14 closed) to 40 °C (flow controller 14 fully open) can be achieved by regulating the primary hot water flow through the heat exchanger 11.

If the thermal energy provided by the first connection 21 is insufficient to achieve the expected drinking water temperature on the secondary side, the electronic control device 17 additionally activates the reheater 15. With simultaneous activation of the reheater 15 and the fully open flow regulator 14, a secondary-side hot water flow of, for example, 60°C can be achieved at the heat exchanger. In the exemplary embodiment, the reheater 15 is arranged downstream of the flow regulator 14 in the primary heating circuit. Thus, it is not necessary for the reheater 15 to meet the strict requirements of the Drinking Water Ordinance or similar legal requirements.

The reheater 15 can also be used to regularly and briefly heat the water exchanger 11. In this way, for example, an automatic disinfection program to prevent or reduce Legionella contamination in the sanitary installation 1 can be implemented by the control device.

After flowing through the water-water heat exchanger 11, the hot water passed through the primary flow regulator 14 and possibly further heated by the reheater 15 flows back to the heat source via a second connection 22 for the return flow at a reduced temperature.

Cold drinking water is supplied to the drinking water supply station 10 via a third connection 23 in the secondary drinking water area 13. As shown in the 2 The drinking water provided typically has a relatively low temperature of, for example, 15 °C.

Furthermore, the drinking water supply station 10 has a plurality of drinking water connections 24a to 24c, which are connected, for example, to the taps 2a, 2d and 2e of the sanitary installation 1 according to 1 are hydraulically connected. The drinking water flows provided via the drinking water connections 24 are controlled by the associated control devices 16 with regard to their temperature and/or volume flow. In the exemplary embodiment, control of both the flow and the temperature is possible. In other embodiments, it is also possible for only one of the two variables to be controlled by the respective control device 16.

As also in the 2 As can be seen, each of the control devices 16a and 16b comprises an inlet-side valve 18 and one or two outlet-side valves 19.

The inlet-side valve 18 can be designed as a changeover or mixing valve. It serves, on the one hand, to selectively supply cold water directly from the third connection 23 or hot water from the heat exchanger 11 to the corresponding drinking water connection 24. If the hot water temperature provided by the heat exchanger 11 is above a desired target temperature and the inlet-side valve 18 is designed as a mixing valve, the hot water provided by the heat exchanger 11 can be cooled to the desired target temperature by adding a corresponding amount of cold water. If only cold drinking water or only unmixed hot drinking water directly from the heat exchanger 11 is to be supplied to the corresponding drinking water connection 24, the inlet-side valve 18 can also be omitted.

In the exemplary embodiment, the outlet-side valve 19 is designed as an adjustable proportional valve or flow regulator. It is used in particular to set a desired flow rate or a desired water quantity. Instead of an adjustable proportional valve, it is also possible in other embodiments to provide a simple shut-off or solenoid valve. In this case, the flow to the corresponding tap can simply be switched on and off by the outlet-side valve 19. The water pressure then essentially corresponds to the water pressure of the drinking water line 9, and the corresponding flow rate is determined by the shape of the outlet fitting or pressure regulators installed along the line. Such a design is suitable, for example, for hand basins where a water flow with a predetermined temperature and flow rate is only to be switched on and off or provided for a predetermined period of time after activation, as is common, for example, in public restrooms. If the flow at the corresponding tap point 2 is controlled by a conventional control valve, such as an integrated valve insert of a conventional water tap, the outlet-side valve 19 can also be omitted.

As in the 2 The primary flow controller 14 and, optionally, the reheater 11 as well as the control devices 16, in the exemplary embodiment in particular their valves 18 and 19, are intelligently controlled by the electronic control device 17. For this purpose, the control device 17 calculates an ideal, i.e. generally the lowest possible, target temperature for the secondary-side outlet of the water-to-water heat exchanger 11 based on the water temperature of the flow line 7 and the desired target temperatures of all remote control units 3 and controls the primary flow controller 14 and, if necessary, the reheater 11 accordingly. In particular, if only one tap 2 requests hot water or the same target temperature is requested at all active taps 2, the flow controller 14 is only opened far enough that this temperature, possibly plus any thermal losses through the pipes 5, is just reached at the secondary outlet of the water exchanger 11. In these cases, mixing the supplied hot water with cold water via the inlet-side valves 18 is not necessary. With variable flow rates, the degree of opening of the primary flow regulator 14 also depends on the water flows through the individual outlet-side valves 19. If multiple hot water flows with different target temperatures are requested, the water temperature at the secondary outlet of the water exchanger 11 is adjusted so that the tap 2 with the highest requested target temperature can be served without mixing. The control devices 16 for all other taps 2 are then controlled so that appropriate amounts of cold water are added via the inlet-side valves to achieve the desired target temperature.

In addition to the request signals received from the respective remote control units 3, connection-specific profile data can also be stored. For example, as shown in the 1 As indicated, it is stored for the control device 16d that this is a drinking water connection 24 for a shower cubicle 4. To avoid possible scalding, a corresponding profile 25d is limited to a maximum hot water temperature of 40 °C. Of course, other parameters, such as a minimum temperature, a preferred or start temperature, a minimum, preferred or maximum flow rate or the like, can also be stored in one of the tap-specific profiles 25a to 25d. This data can be preset either via the corresponding remote control unit 3a to 3d or via a central administration interface of the drinking water supply station 10 (not shown in the figures) and stored, for example, in the individual remote control units 3a to 3d or the electronic control device 17.

The control devices 16 and/or the control device 17 can optionally be designed in such a way that cold drinking water is provided at an associated tap 2, in particular a conventional fitting with a built-in mechanical outlet valve, as long as associated remote control unit 3 is not actively requesting hot water. For example, the inlet-side valve 18 can establish a direct connection to the third connection 23 without a corresponding hot water request signal. If no inlet-side switching or mixing valve 18 is provided in the control devices 16, cold water can be drawn at least as long as the primary flow regulator 14 is closed and thus no heat energy is transferred from the primary heating area 12 to the secondary drinking water area 13.

The 3A and 3B show possible configurations of the remote control units 3a and 3d for installation near the respective taps 2a and 2d and 2e. 3A The first remote control unit 3a shown is particularly suitable for installation in the area of simple taps, such as a spout in the vicinity of a washbasin. In the illustrated embodiment, the first remote control unit 3a comprises a first control element 31 for starting or stopping a water flow. Furthermore, the remote control unit 3a comprises a second control element 32 and a third control element 33 for increasing or reducing a flow rate. Finally, the remote control unit 3a comprises a fourth control element 34 and a fifth control element 35 for increasing or decreasing a temperature of the supplied water.

The alternative, second remote control unit 3d according to 3B It also has three selector switches 36 to 38, by means of which different output connections or tap points 2d and 2e can be selected. Such a remote control unit 3d is suitable, for example, for shower cubicles 4 with multiple shower installations, for example, with a top-mounted shower head and an additional hand shower. In this case, the selector switches 36 to 38 can be used to select either a first tap point 2d or a second tap point 2e, or a combination of the two tap points 2d and 2e. Of course, other application scenarios are also possible, for example, the selection of one of three alternative tap points.

In addition, the second remote control unit 30 includes a display unit 39, which can be used, for example, to display the currently selected target temperature. Of course, such a display unit 39 can also be integrated into the first remote control unit 3a. Alternatively or additionally, the control elements 31 to 38 in both remote control units 3a and 3d can be illuminated and/or configured as status displays.

The described remote control units 3 provide purely digital control of the water flows provided via the respective taps 2. A corresponding temperature or flow sensor in the area of the taps 2 is not required.

Instead, all sensors and actuators required to control the entire system can be integrated into the drinking water supply station 10. In the exemplary embodiment, in addition to the previously described actuators, this includes, in particular, inlet-side flow and temperature sensors integrated into the primary flow controller 14, as well as outlet-side temperature and flow sensors integrated into the respective control devices 16a to 16d. Optionally, additional sensors can be provided in the reheater 15 and/or at the inlets and/or outlets of the water heat exchanger 11 to monitor the functioning and actual water flows and temperatures within the drinking water supply station 10 and to regulate them as needed.

Using the approach described above, a plumbing installation 1 can be fully integrated into a so-called smart home. In particular, the control system is completely shifted from a conventional, mechanical, or hydraulic domain to the electronic domain. Thus, the described system is particularly suitable for the development of advanced application scenarios that have previously been difficult to implement with conventional plumbing installations.

List of reference symbols

1

Sanitary installation

2

Taps

3

remote control unit

4

shower cubicle

5

pipeline

6

branch

7

Lead-up

8

Return

9

Drinking water pipe

10

Drinking water supply station

11

Water-water heat exchanger

12

primary heating area

13

secondary drinking water sector

14

primary flow regulator

15

afterheater

16

Control device

17

electronic control device

18

inlet valve

19

outlet-side valve

20

Housing

21

first connection

22

second connection

23

third connection

24

Drinking water connection

25

profile

31

first control element

32

second control element

33

third control element

34

fourth control element

35

fifth control element

36

first selection button

37

second selection button

38

third selection button

39

Display unit

Claims (15)

Sanitary installation (1), comprising: - a hot water component for providing hot water, in particular domestic hot water, for at least one tap (2); - at least one tap (2) connected to the hot water component; - at least one remote control unit (3) for requesting a target temperature and/or a target volume flow for the at least one tap (2); and - at least one control device (16) structurally separate from and coupled to the remote control unit (3) for setting an actual temperature and/or an actual volume flow from the hot water component to the at least one tap (2) based on the requested target temperature and/or the requested target volume flow. Sanitary installation (1) according to Claim 1 , wherein - the at least one control device (16) is integrated into the hot water component or coupled thereto; and - the hot water component only provides hot water when requested by at least one remote control unit (3). Sanitary installation (1) according to Claim 2 , wherein the hot water component is configured to provide hot water at the requested target temperature. Sanitary installation (1) according to Claim 2 or 3 , wherein cold water, in particular drinking cold water, is made available at the at least one tap (2) when no hot water is requested by the at least one remote control unit (3). Sanitary installation (1) according to one of the Claims 2 until 4 , comprising: - a plurality of taps (2) connected to the hot water component; - a plurality of remote control units (3) for requesting a target temperature and/or a target volume flow for each of the plurality of taps (2); and - a plurality of control devices (16) for setting an actual temperature and/or an actual volume flow from the hot water component to each of the plurality of taps (2) based on a target temperature and/or a requested target volume flow requested for the respective tap (2); - wherein the hot water component is configured to provide hot water with the highest requested target temperature. Sanitary installation (1) according to one of the Claims 1 until 5 , wherein the hot water component is connected to each of the at least one tap (2) via a single pipe connection (6), in particular a direct line, which is pressureless when the respective tap (2) is not in use, from a control device (16) assigned to the respective tap (2) to the tap (2). Sanitary installation (1) according to one of the Claims 1 until 6 , wherein the hot water component and the at least one control device (16) are structurally integrated into a decentralized drinking water supply station (10), in particular an apartment station connected between a central building installation and an apartment-internal sanitary installation. Sanitary installation (1) according to one of the Claims 1 until 7 , wherein the at least one remote control unit (3) and the at least one control device (16) are coupled to one another via a wireless radio connection and/or a bus connection, in particular an RS485 MODBUS connection. Sanitary installation (1) according to one of the Claims 1 until 8 , wherein the at least one tapping point (2d, 2e) and the at least one remote control unit (3d) are arranged in a wet room, in particular a shower cubicle (4). Drinking water supply station (10), in particular for use in a sanitary installation (1) according to one of the Claims 1 until 9 , comprising: - a hot water component for providing hot drinking water for at least one tap (2); - at least one drinking water connection (24) for connecting the drinking water supply station (10) to a tap (2); - at least one interface for receiving a request signal from a remote control unit (3) structurally separate from the drinking water supply station (10); and - at least one control device (16) for setting an actual temperature and/or an actual volume flow for the at least one drinking water connection (24) based on the request signal. Drinking water supply station (10) to Claim 10 , wherein the hot water component comprises the following: - a water-water heat exchanger (11) which is connected on the primary side to an external heat source and on the secondary side to a drinking water supply line and the at least one control device (16); - a flow regulator (14) hydraulically connected between the external heat source and the water-water heat exchanger (11); and - a control component, wherein the control component is configured to control the flow regulator (14) based on the request signal such that hot drinking water with a requested target temperature is provided at the at least one drinking water connection (24). Drinking water supply station (10) to Claim 11 , wherein the hot water component further comprises an electrical reheating unit (15) and the control component is configured to control the flow controller (14) and the electrical reheating unit (15) based on the request signal such that hot drinking water with a requested target temperature is provided at the at least one drinking water connection (24). Drinking water supply station (10) to Claim 12 , wherein the electrical reheating unit (15) is hydraulically connected between the external heat source and the water-water heat exchanger (11) and the control component is designed to activate the electrical reheating unit (15) only when a flow temperature of the external heat source is not sufficient to provide hot drinking water at the requested target temperature at the at least one drinking water connection (24). Drinking water supply station (10) according to one of the Claims 11 until 13 , wherein the control component is designed to control the flow regulator (14) and optionally an electrical after-heating unit (15) in such a way that the water-water heat exchanger (11) is heated briefly, in particular at regular intervals, to a predetermined temperature, in particular a temperature of at least 60 °C. Drinking water supply station (10) according to one of the Claims 10 until 14 , wherein the drinking water supply station (10) has a plurality of drinking water connections (24) for connecting the drinking water supply station (10) to a corresponding plurality of taps (2) and a corresponding plurality of control devices (16) for setting an actual temperature and/or an actual volume flow for the respective drinking water connection (24) based on an associated request signal.