Device and method for providing a fluid and sanitary fitting system

Abstract

The invention relates to a device for providing a fluid, in particular water, comprising a hot fluid supply device, preferably in the form of a hot fluid line which can be connected to a central heating system for providing hot fluid, a cold fluid supply device for providing cold fluid, preferably in the form of a cold fluid line and a local hot fluid supply device for providing hot fluid, wherein a fluid flow comprising at least partially hot fluid from the hot fluid supply device can be supplied to the hot fluid supply device for providing the hot fluid.

Description

[0001] The invention relates to a device for providing a fluid, in particular water, comprising a hot fluid supply device, preferably in the form of a hot fluid line, which can be connected to a central heating system for providing hot fluid. a cold fluid supply device for providing cold fluid, preferably in the form of a cold fluid line, and a local hot fluid supply device for providing hot fluid.

[0002] The invention further relates to a method for providing a fluid, in particular water, comprising the steps of: Provision of warm fluid by means of a warm fluid supply device, preferably in the form of a warm fluid line which can be connected to a central heating system for the provision of warm fluid, optionally provision of cold fluid by means of a cold fluid supply device, preferably in the form of a cold fluid line, and provision of hot fluid by means of a local hot fluid supply device.

[0003] The invention further relates to a sanitary fitting system comprising a device for providing a fluid and a sanitary fitting which is fluidically connected to the device for providing the fluid.

[0004] Although generally applicable to any device for providing a fluid, the present invention is explained in relation to a sanitary fitting as a device for providing a fluid.

[0005] Although generally applicable to any fluid, the present invention is explained in relation to water as the fluid.

[0006] Sanitary fittings have become known in a wide variety of forms. For example, well-known sanitary fittings have a body with at least one actuator for adjusting at least one property of the fluid flow passing through the fitting. This property could be, for example, the flow rate or temperature of the fluid flow. In known sanitary fittings, the fluid flow is mixed, for example, from separate cold and hot water streams using a mixing device and then directed to a spout.

[0007] From EP 4 239 133 A1, a device and a method for providing a fluid in the form of water are known, wherein the known device typically provides mixed water from hot and cold water, with the hot water coming from a central hot water source, for example, a central heating system. A hot fluid in the form of hot water is generated from cold water via a hot fluid supply device with a boiler capable of providing hot water at temperatures above 60 degrees Celsius.

[0008] Furthermore, WO 2018 131 028 A1 discloses a device and a method for providing a fluid in the form of water, wherein a hot fluid in the form of hot water can be provided via a hot fluid supply device.

[0009] A disadvantage of this approach is that providing the hot fluid or hot water requires a large amount of energy, as is necessary with known devices by heating the existing cold fluid or cold water. The supplied cold fluid or cold water is typically heated to a desired target temperature of up to 100°C, depending on the system settings, using direct electric heating. This results in high electricity costs and significant environmental impacts.

[0010] One object of the present invention is therefore to provide a device and a method for providing a fluid and a sanitary fitting system, which enables energy-saving operation with a simple design.

[0011] Another object of the present invention is to provide an alternative device for providing a fluid, an alternative method for providing a fluid, and an alternative sanitary fitting system.

[0012] The present invention solves the aforementioned problems in a device for providing a fluid, in particular water, comprising a hot fluid supply device, preferably in the form of a hot fluid line, which can be connected to a central heating system for providing hot fluid. a cold fluid supply device for providing cold fluid, preferably in the form of a cold fluid line, and a local hot fluid supply device for providing hot fluid, in that a fluid flow comprising at least partially hot fluid from the hot fluid supply device can be supplied to the hot fluid supply device for providing the hot fluid.

[0013] The present invention solves the aforementioned problems with a method for providing a fluid, in particular water, in particular with a device according to any one of claims 1 to 12, comprising the steps: Provision of warm fluid by means of a warm fluid supply device, preferably in the form of a warm fluid line which can be connected to a central heating system for the provision of warm fluid, optionally provision of cold fluid by means of a cold fluid supply device, preferably in the form of a cold fluid line, provision of hot fluid by means of a local hot fluid supply device, supply of warm fluid from the warm fluid supply device to the hot fluid supply device for the provision of the hot fluid.

[0014] The present invention also solves the aforementioned problems with a sanitary fitting system comprising a device for providing a fluid according to one of claims 1-12, and a sanitary fitting which is fluidically connected to the device for providing the fluid.

[0015] The term "sanitary" is to be understood in the broadest sense and refers, particularly in the claims, preferably in the description, generally to the kitchen area, the bathroom or laundry area, and the heating area.

[0016] The term "fluid" is to be understood in the broadest sense and refers, particularly in the claims, preferably in the description, generally to one or more liquids, one or more gases and their mixture, in particular gases dissolved in a liquid.

[0017] The term "central" in relation to a hot fluid supply device is to be understood in the broadest sense and refers, particularly in the claims, preferably in the description, generally to a hot fluid supply device such as a central heating system, a central hot water storage tank or a circulating water heater, also called a combi boiler, arranged centrally in a house, for example a single-family house, for an apartment or the like, which in particular provides hot water to a plurality of different outlets within the house or within an apartment.

[0018] The term "local" in relation to a hot fluid supply device is to be understood in the broadest sense and refers, particularly in the claims, and preferably in the description, generally to a hot fluid supply device such as an instantaneous water heater, boiler, or the like, arranged locally or decentrally in a house, for example, a single-family house, which in particular supplies hot water to only one directly connected dispensing point within the house. The pipe length between the hot fluid supply device and the dispensing point is typically less than 5 m, preferably less than 2 m, particularly less than 1.5 m, and preferably less than 1 m.

[0019] The term "cold fluid" usually refers to a fluid, especially water, with a temperature that is typically around 15 to 20 °C for ordinary tap water in a house pipe.

[0020] The term "hot fluid" usually refers to a fluid with a temperature of 60 °C or less, as is typically provided by a central hot fluid supply facility.

[0021] The term "hot fluid," on the other hand, typically refers to a fluid with a temperature above 60 °C up to 100 °C or more. In any case, the temperature of the hot fluid is higher than the temperature of the warm fluid.

[0022] One of the advantages achieved is that by supplying warm fluid to the hot fluid supply device, it is possible to provide the hot fluid from a fluid with a higher temperature than is the case with known devices where hot fluid is generated exclusively on the basis of cold fluid at its usual temperature.

[0023] Further features, advantages and further embodiments of the invention are described below or become apparent therein.

[0024] According to an advantageous embodiment of the invention, a valve assembly is arranged which comprises at least one of the following valves: a thermal, thermostatic, mechanical, and / or electrically actuated mixing valve, preferably a 3-way valve, and which is configured to provide the fluid flow. An advantage of this is that the provision of the fluid flow can be achieved in a structurally simple and simultaneously reliable manner using such a valve assembly. A further advantage is that the fluid flow can be generated very easily from the cold fluid and the hot fluid.

[0025] According to a further advantageous embodiment of the invention, the valve assembly is configured to provide the fluid flow via individual, preferably electrically controlled, valves, which are assigned to a cold fluid line and a hot fluid line. One of the advantages achieved is that, compared to a mixing valve, structurally simpler valves can be used that can control the flow rate of the cold fluid and the hot fluid. In the event of a defect, usually only one of the simple valves needs to be replaced, rather than a more complex mixing valve.

[0026] According to a further advantageous embodiment of the invention, the mixing valve or individual valves are arranged in a cold fluid line and in a hot fluid line, preferably in the area of ​​the hot fluid supply device, and more preferably at an inlet to the hot fluid supply device or within the hot fluid supply device itself. One of the advantages achieved thereby is the reliable operation of the mixing valve or valves directly in the cold and hot fluid lines and a compact and simple design of the device, particularly when the mixing valve or valves are arranged in the area of ​​the hot fluid supply device or at an inlet to the hot fluid supply device.Depending on the design of the hot fluid supply device, a particularly compact design of the device can be achieved by arranging the mixing valve or valves in the hot fluid supply device.

[0027] According to a further advantageous embodiment of the invention, the mixing valve or individual valves are arranged upstream of the hot fluid supply device, in particular a boiler of the hot fluid supply device. One of the advantages achieved thereby is, quite specifically, a reliable supply of the hot fluid or fluid flow for use by the hot fluid supply device.

[0028] According to a further advantageous embodiment of the invention, a temperature range, in particular a defined temperature of the fluid flow, can be specified. One of the advantages thereby achieved is, in particular, the assurance of the proper functioning of one or more further components of the device if the function of the component or components is only guaranteed up to a maximum temperature of the fluid flow. Advantageously, the temperature or a maximum temperature can be selected such that the proper functioning of the component that allows the lowest temperature or maximum temperature of all components is also ensured.

[0029] According to a further advantageous embodiment of the invention, a temperature sensor for the cold fluid, the hot fluid, and / or the fluid flow is assigned to the cold fluid line, the hot fluid line, and / or a line for the fluid flow. One of the advantages achieved thereby is a particularly reliable operation of the device through individual and flexible monitoring by means of one or more temperature sensors.

[0030] According to a further advantageous embodiment of the invention, the temperature sensor(s) is / are arranged in a mixing valve or valve. One of the advantages achieved thereby is a particularly compact and simple design of the device, whereby no separate arrangement of one or more temperature sensors is required.

[0031] According to a further advantageous embodiment of the invention, temperature measurements taken by means of the temperature sensor(s) can be supplied to a control unit and converted into control signals for the mixing valve and / or the individual valves, the control unit preferably comprising electronics. One of the advantages achieved thereby is a particularly reliable and simple setting or adjustment of a temperature or maximum temperature of a hot fluid or mixed fluid flow supplied to the hot fluid supply unit by means of temperature-dependent control of the mixing valve and / or the individual valves.

[0032] According to a further advantageous embodiment of the invention, the control device is designed to regulate the predefinable temperature of the fluid flow within the predefinable temperature range. One of the advantages achieved thereby is a reliable and simple setting or maintenance of a constant temperature, or even a maximum temperature, even when the temperature of the cold fluid and / or the hot fluid fluctuates during operation of the device.

[0033] According to a further advantageous embodiment of the invention, the hot fluid supply device, the mixing valve, the individual valves, the temperature sensor(s), and / or the control unit are arranged in a water treatment unit. One of the advantages achieved thereby is the secure housing of the components within the water treatment unit, combined with particularly easy handling of the components, for example, in the case of retrofitting an existing sanitary fitting system.

[0034] According to a further advantageous embodiment of the invention, a further fluid component, in particular a water treatment component, for example in the form of a filter, is arranged, which has a predefinable upper limit for an operating temperature, and wherein the temperature of the fluid that can be supplied to the hot fluid supply device is less than or equal to the upper limit for the operating temperature. The temperature of the fluid, for example mixed water, with which the hot fluid supply device is supplied can be provided such that it does not exceed the upper limit for the operating temperature of the further component or has the temperature of the upper limit. This applies in particular if the further component is arranged upstream of the hot fluid supply device.The advantage of this is the efficient supply of hot fluid to the hot fluid supply unit without affecting the service life of other components. In particular, the temperature of the fluid supplied to the hot fluid supply unit can be controlled so that it is supplied 1 °C, 2 °C, 5 °C, etc., below the upper limit of the hot fluid supply unit. If several other components are present, the temperature for each of these components can be controlled accordingly. Thus, the temperature can be regulated to the lowest upper limit when multiple additional components are present.For example, if two or more additional components are arranged, the temperature of the fluid for the hot fluid supply device can be regulated to the respective upper limit of the additional component, depending on which of the two additional components is arranged in the fluid flow to the hot fluid supply device or can be switched into it, so that no damage occurs to either additional component, but the hot fluid supply device is supplied with fluid at the highest possible temperature.

[0035] Further important features and advantages of the invention will become apparent from the dependent claims, the drawing and the accompanying description of the figures based on the drawing.

[0036] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0037] Preferred embodiments and configurations of the present invention are shown in the drawing and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components or elements.

[0038] This is shown in schematic form Figure 1 shows a sanitary fitting system according to an embodiment of the present invention with a thermostatic mixing valve; Figure 2 shows a sanitary fitting system according to an embodiment of the present invention with a 3-way mixing valve; Figure 3 shows a sanitary fitting system according to an embodiment of the present invention with individual valves; Figure 4 shows a sanitary fitting system according to an embodiment of the present invention with individual valves and further water treatment; and Figure 5 shows steps of a method according to an embodiment of the present invention.

[0039] Figure 1Figure 1 shows a sanitary fitting system 1 according to an embodiment of the present invention, wherein the sanitary fitting system 1 comprises a cold water line 2 of a cold fluid supply device, a hot water storage tank 3 of a hot fluid supply device which includes a central heating system, a boiler 4 of a hot fluid supply device, and a sanitary fitting 21 for dispensing cold, warm, and hot water. The sanitary fitting 21 has a base body 5 with a mixing device 5b, on which an operating lever 5a is arranged for adjusting the flow rate and for adjusting the temperature of the mixed water to be dispensed by means of the mixing device 5b. The mixed water can be dispensed via an outlet 6 arranged on the base body 5, with a discharge 6a at one end thereof.

[0040] For the dispensing of mixed water, the cold water line 2 is directly connected to the mixing device 5b. On the other hand, the cold water line 2 is connected to a water treatment unit 7 and opens into a thermostatic mixing valve 8. A hot water line 9 from the central heating system's hot water storage tank 3 also opens into this mixing valve 8 to supply the boiler 4 with a fluid flow 10 mixed with cold and hot water via the outlet of the mixing valve 8. The hot water line 9 is also connected to the mixing device 5b for the supply of mixed water. The mixed fluid flow 10 is supplied to the boiler 4 along a line 10a through a check valve 11, a switching valve 13 (which can be controlled via a control device 12 and a control line 13a), a limescale filter 14, and a pressure relief valve 15. The boiler 4 is fluidically connected downstream to the sanitary fitting 21, with a further switching valve 17 arranged in an associated line 16.

[0041] The mixing valve 8 is arranged at the inlet of the water treatment unit 7, which in the present embodiment is designed or serves as part of the hot fluid supply device. Alternatively, the mixing valve 8 can also be arranged at another suitable location in or outside the water treatment unit 7 – hydraulically upstream – and outside the boiler 4.

[0042] Common hot / boiling water systems or hot fluid supply devices are connected to a cold water line, whereby, during hot water production, the tap water from this line is heated from a typical temperature of 15-20°C to a target value of ~60-100°C via direct electric heating, for example according to the immersion heater principle.

[0043] In exemplary embodiments of the present invention, the hot fluid supply device is connected to a hot and a cold water line. The incoming water can be mixed to the maximum possible temperature via a thermostatic mixing valve 8, which can then be applied to the least temperature-resistant component in the system, for example, a filter such as the limescale filter 14.

[0044] In conjunction with, for example, renewable heating systems or hot fluid supply facilities – solar thermal, geothermal, photovoltaic, biomass – the primary energy efficiency of heating can be significantly reduced by using externally sourced electricity. According to a sample calculation, savings of approximately 41% can be achieved if the hot fluid is to be heated to 100 °C and, for example, the cold water has a temperature of 15 °C, and a mixed fluid flow 10 with a temperature of 50 °C can be used by adding hot water: 1 − 100 ∘ C − 50 ∘ C / 100 ∘ C − 15 ∘ C = ∼ 41 %

[0045] It should be noted that instead of the mixed fluid flow 10, only hot water from the hot water storage tank 3 can be supplied, provided that the temperature of this hot water does not exceed the maximum possible temperature that the least temperature-resistant component in the system can withstand. In this case, the mixing valve 8 would not mix cold water, but would only supply hot water to line 10a.

[0046] Figure 2 shows a sanitary fitting system 1 according to an embodiment of the present invention, wherein this embodiment is fundamentally the embodiment from Figure 1 This corresponds to the above. In this respect, for a detailed description of this embodiment, reference is generally made to the description of the Figure 1 referred.

[0047] In contrast to the embodiment made of Figure 1 indicates the in Figure 2The embodiment shown is in place of a thermostatic mixing valve - reference numeral 8 in Figure 1 - an electric 3-way mixing valve 18. This mixing valve 18 is located in the same position as the mixing valve 8 in the embodiment according to Figure 1 It is arranged and can also be arranged at other positions on the device – such as the mixing valve 8. These positions are already described in the description for Figure 1 explained.

[0048] In this embodiment, the mixed fluid flow 10 is supplied via an electrically controlled 3-way mixing valve 18 based on a temperature measured by a temperature sensor 19. The temperature sensor 19 is connected to the control unit 12 via a measuring line 20. The mixing valve 18 can be controlled by the control unit 12 via a control line 22.

[0049] In another embodiment, the switching valve 13, which serves as the inlet valve for the filter 14, can be omitted to simplify the system or the device. The function of the switching valve 13 can be taken over by the mixing valve 18.

[0050] Figure 3 shows a sanitary fitting system 1 according to a further embodiment, which is described in Figure 2 The embodiment shown largely corresponds to the embodiment shown, except that instead of an electric 3-way mixing valve 18, two individual switchable valves 23 (hot water line) and 24 (cold water line) are implemented. The valves 23 and 24 can be implemented in different positions, just like the mixing valve 8 and the 3-way mixing valve 18 of the embodiments described above. These positions are already described in the description of the Figure 1 explained.

[0051] In this embodiment, the mixed fluid flow 10 is supplied via two electrically controlled individual valves 23 and 24 based on the temperature measured at the temperature sensor 19. The temperature sensor 19 is also connected to the control unit 12 via a measuring line 20 in this embodiment. The valves 23 and 24 can be controlled by the control unit 12 via a control line 22.

[0052] In a further embodiment, the switching valve 13, which serves as the inlet valve for the filter 14, can also be omitted based on this embodiment to simplify the system or the device. The function of the switching valve 13 can be taken over by the valves 23 and 24.

[0053] Figure 4 shows a sanitary fitting system according to an embodiment based on the embodiment according to Figure 3The system is based on an additional water treatment process implemented in the water treatment unit 7. A cooling device 25 with a cooling circuit is implemented in the water treatment unit 7 to provide particularly cool chilled water. Alternatively, still or sparkling chilled water can be provided. To provide sparkling chilled water, a carbonation device 26 is additionally implemented in the water treatment unit 7. Downstream of the carbonation device 26, two switching valves 27 and 28 are arranged. To provide chilled water, switching valve 28 is closed and switching valve 27 is open.

[0054] When sparkling water is drawn, the switching valve 27 is closed and the switching valve 28 is opened. Only cold water should be introduced into the device or the water treatment unit 7. Therefore, only the switching valve 24 located in the cold water line 2 is opened during dispensing – preferably simultaneously.

[0055] When hot water beverages are dispensed, the switching valve 17 serving a hot water dispenser is opened. At the same time, the two switching valves 23, 24 located in the area of ​​the inlet of the water treatment unit 7 are opened / pulsed in a suitable manner, while the switching valves 27, 28 remain closed.

[0056] In Figure 5 The steps of a method for providing a fluid, in particular water, are shown, wherein the method can be carried out with an embodiment of the device according to the invention. The method comprises the following steps: Providing S1 of warm fluid by means of a warm fluid supply device, preferably in the form of a warm fluid line which can be connected to a central heating system for the provision of warm fluid, optionally providing S2 of cold fluid by means of a cold fluid supply device, preferably in the form of a cold fluid line, and providing S3 of hot fluid by means of a local hot fluid supply device, supplying S4 of warm fluid from the warm fluid supply device to the hot fluid supply device for the provision of the hot fluid.

[0057] Important aspects and advantages of embodiments of the invention are listed below: In one embodiment of the present invention, a reduction in conventional energy consumption is made possible by using renewable or at least cost-effective energy sources in hot / boiling water systems. This is achieved by supplying hot fluid to the hot fluid supply device 4 during the provision of hot fluid by the hot fluid supply device 4.

[0058] In one embodiment of the present invention, hot water from the central hot water supply is fed in up to the maximum temperature at which all internal components are resistant and / or at which all internal components remain functional. Even when using conventional oil and gas heating systems, this is more cost-effective than direct heating with electricity. Furthermore, using hot water heated by renewable energy sources results in a significant ecological advantage.

[0059] In an embodiment of the present invention with one inlet valve 24, 23 each in the cold and hot water inlet, it is also possible to use it in combination systems for hot and chilled water, as shown by Figure 4 is explained in detail.

[0060] In embodiments of the present invention, distribution fittings are inserted into the hot and cold water lines, and a hot and a cold water line are connected to a thermal or electric mixing valve 8, 18. Alternatively, individually electrically controlled valves 23, 24 can be installed in the two lines. In these embodiments, the valves 8, 18, 23, 24 can be positioned either in the supply lines to the hot fluid supply unit 4 or at its inlet. In the case of electrically controlled valves 18, 23, 24, the mixed water temperature must be measured by a temperature sensor 19 to limit its temperature. Measured temperature values ​​are received by an internal or external electronics or control unit 12 and converted into control signals to the valves 18, 23, 24.

[0061] An advantage of all embodiments of the present invention is, as a result, an economically and / or ecologically optimized hot / boiling water production, for example in beverage dispensers, by using preheated water from cost-effective conventional heating with gas or oil or by using water heated from renewable energy sources.

[0062] The embodiments of the present invention can be used in all hot or boiling water systems, including combination appliances that also provide chilled water.

[0063] In summary, at least one embodiment of the invention has at least one of the following advantages and / or provides at least one of the following features: Simple, cost-effective manufacturing. Energy savings in the supply of hot fluid, especially hot water.

[0064] Although the present invention has been described using preferred embodiments, it is not limited to these, but can be modified in many ways. Reference symbol list

[0065] 1 Sanitary fitting system 2 Cold water pipe, cold fluid pipe 3 Hot water storage tank, hot fluid supply unit 4 Hot water storage tank / boiler, hot fluid supply unit 5 Base unit 5a Control lever mixed water 5b Mixing device 6 Outlet 6a Outlet 7 Water treatment unit 8 Thermostatic mixing valve 9 Hot water pipe, hot fluid pipe 10 Mixed fluid flow 10a Pipe 11 Check valve 12 Control device 13 Switching valve 13a Control line 14 Limescale filter 15 Pressure relief valve 16 Pipe 17 Switching valve 18 Electric 3-way mixing valve 19 Temperature sensor 20 Measuring line 21 Sanitary fitting 22 Control line 23 Switching valve, valve 24 Switching valve, valve 25 Cooling device 26 Carbonation device 27 Switching valve 28 switching valve S1-S4 Steps of a procedure

Claims

1. Device for supplying a fluid, in particular water, comprising a hot fluid supply device (3), preferably in the form of a hot fluid line which can be connected to a central heating system for supplying hot fluid, a cold fluid supply device for supplying cold fluid, preferably in the form of a cold fluid line, and a local hot fluid supply device (4) for supplying hot fluid, characterized by the fact that The hot fluid supply device (4) can be supplied with a fluid stream (10), comprising at least partially hot fluid from the hot fluid supply device (3), for the purpose of supplying the hot fluid.

2. Device according to claim 1, characterized by the fact thata valve assembly is arranged which comprises at least one of the following valves: thermal, thermostatic, mechanical and / or electrically controllable mixing valve (8, 18), preferably a 3-way valve, and which is configured to provide the fluid flow (10).

3. Device according to claim 1, characterized by the fact that the valve assembly is designed to provide the fluid flow (10) via individual, preferably electrically controlled, valves (23, 24) which are arranged to a cold fluid line (2) and a hot fluid line (9).

4. Device according to claim 2 or 3, characterized by the fact that the mixing valve (8, 18) or the individual valves (23, 24) is or are arranged in a cold fluid line (2) and in a hot fluid line (9), preferably in the area of ​​the hot fluid supply device (4), further preferably at an inlet to the hot fluid supply device (4) or in the hot fluid supply device (4).

5. Device according to one of claims 2 to 4, characterized by the fact that the mixing valve (8, 18) or the individual valves (23, 24) are arranged upstream of the hot fluid supply device (4), in particular a boiler (4) of the hot fluid supply device (4).

6. Device according to any one of claims 1 to 5, characterized by the fact that a temperature range, in particular a defined temperature of the fluid flow (10), can be specified.

7. Device according to one of claims 4 to 6, characterized by the fact that a temperature sensor (19) for the cold fluid, the hot fluid and / or the fluid flow (10) is assigned to the cold fluid line (2), the hot fluid line (9) and / or a line (10a) for the fluid flow (10).

8. Device according to claim 7, characterized by the fact that the temperature sensor(s) (19) is or are arranged in a mixing valve (8, 18) or valve (23, 24).

9. Device according to claim 7 or 8, characterized by the fact thatTemperature measurements taken by means of the temperature sensor (19) or temperature sensors (19) can be supplied to a control unit (12) and converted into control signals for the mixing valve (18) and / or the individual valves (23, 24), wherein the control unit (12) preferably has electronics.

10. Device according to claim 9, characterized by the fact that the control device (12) is designed to regulate the predefinable temperature of the fluid flow within the predefinable temperature range.

11. Device according to any one of claims 1 to 10, characterized by the fact that the hot fluid supply device (4), the mixing valve (8, 18), the individual valves (23, 24), the temperature sensor(s) (19) and / or the control device (12) are arranged in a water treatment unit (7).

12. Device according to any one of claims 1 to 11, characterized by the fact thata further fluid component, in particular a water treatment component, for example in the form of a filter, is arranged which has a predefinable upper limit for an operating temperature and wherein the temperature of the fluid which can be supplied to the hot fluid supply device is less than or equal to the upper limit for the operating temperature.

13. Method for providing a fluid, in particular water, in particular with a device according to any one of claims 1 to 12, comprising the steps: - providing (S1) warm fluid by means of a warm fluid supply device (3), preferably in the form of a warm fluid line which can be connected to a central heating system for providing warm fluid, - optionally providing (S2) cold fluid by means of a cold fluid supply device, preferably in the form of a cold fluid line, - providing (S3) hot fluid by means of a local hot fluid supply device (4), - supplying (S4) warm fluid from the warm fluid supply device (3) to the hot fluid supply device (4) for providing the hot fluid.

14. Sanitary fitting system (1) comprising a device for providing a fluid according to any one of claims 1 to 12, and a sanitary fitting (21) which is fluidically connected to the device for providing the fluid.

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