TRINKWARMWASSER-ERZEUGUNGSANLAGE

Description

[0001] The invention relates to a domestic hot water generation system. State of the art

[0002] In times of climate change and the need for energy-efficient housing and construction, legislators are placing ever stricter demands on energy consumption in the building sector. At the same time, very high temperatures are becoming increasingly common in summer, meaning an increase in so-called "hot days" above 35°C, which is leading, among other things, to a growing prevalence of air conditioning or cooling in living spaces.

[0003] Furthermore, the proportion of the urban population will continue to grow in the future. Therefore, more and more people will live in multi-story residential buildings.

[0004] In residential construction, especially in multi-story low-energy residential buildings, very high costs are currently and will continue to be incurred in the future due to work required to prepare heating and air conditioning systems. This includes the complex installation of piping systems for air, heating, and hot water. Heating and domestic hot water are usually prepared separately by a central heating system and then pumped separately to the consumers. The costs for structural engineering, such as plumbing and heat supply, amount to approximately 7.5% of the construction costs in new buildings and can sometimes reach up to 12.5% ​​when controlled living space ventilation is used. The costs of building extensions will continue to rise in the future due to the use of new, more environmentally friendly technologies, as the installation of piping is resource-intensive.

[0005] In addition, updated regulations to prevent Legionella in domestic hot water make it necessary to install heated domestic hot water circulation pipes in central hot water systems, which further increases costs.

[0006] In summary, the owner or builder of a new building is obligated to purchase various services and products from different suppliers. These include, for example, a heat generator, water heater, heat distribution system (e.g., radiators or underfloor heating), optional cooling, individual room control, water heater, heating circuit manifold, heat meter, and the installation of these components. The procurement, coordination, and installation of the various components together result in enormous effort and the aforementioned costs.

[0007] For example, a so-called "TTA hot water heat pump" from tecalor is already available. This includes a hot water boiler or hot water storage tank whose drinking water can be heated using a small heat pump. For this purpose, ambient air is drawn in, and its thermal energy is used by a heat exchanger to heat the stored drinking water or hot water.

[0008] Used for hot water production. This hot water generator is typically located in the basement and often draws in outside air or basement air, which is then used as a heat source or cooled accordingly and released into the atmosphere via air ducts / pipes. The hot water generated centrally or in the basement is then piped to the individual floors or rooms via a building plumbing system and used at the individual water fixtures of the existing sinks, showers, bathtubs, or kitchen faucets. Such a domestic hot water generation system is known from DE19702903 A1. Object and advantages of the invention

[0009] The object of the invention is to propose a domestic hot water generation system which at least partially improves the disadvantages of the prior art.

[0010] This object is achieved by the features of claim 1. Advantageous embodiments and further developments of the invention are possible by the measures mentioned in the subclaims.

[0011] Accordingly, a domestic hot water generation system according to the invention is characterized in that at least one building space heating surface is provided at least on the housing and / or the casing for heating / warming the building space.

[0012] With the help of such a building space heating surface of the domestic hot water generation unit, which is present on the housing and / or the casing, i.e., which is present on the contour / casing / shell / housing or which encloses the domestic hot water generation unit, the building space can be heated directly. This means that the building space, preferably a living space, in which the domestic hot water generation unit or a so-called "room unit" is installed or arranged, can be heated directly by the domestic hot water generation unit or without (long or complex) heating pipes and / or without underfloor heating or underfloor heating loops or without radiators or the like. Accordingly, complex radiators, underfloor heating systems can be omitted in this room and possibly also in neighboring rooms of the apartment / residential unit. This not only reduces the installation effort but alsoNot only the number of necessary heating components such as heating cables, thermostats, and / or radiators / underfloor heating, etc., but also, above all, the financial outlay and construction costs. The invention also advantageously reduces the time required for installation, i.e., the construction time.

[0013] Accordingly, the domestic hot water generation unit according to the invention, or a so-called "room unit," is designed as a room heating element for the building / living space. If necessary, a domestic hot water generation unit according to the invention is located in each building space that is to be heated or where heating is required, e.g., in the living room and / or bathroom and / or kitchen and / or study, or the like. It is preferred to provide only a single domestic hot water generation unit per residential unit or apartment. This is cost-effective, space-saving, and sufficient in terms of the required heating energy.

[0014] Preferably, at least one heating water heat exchanger unit comprises the building space heating surface, wherein the heating water heat exchanger unit is arranged within the housing and / or the casing. This advantageously allows heat exchange between the domestic hot water generation unit and the building space / living space to be realized.

[0015] Advantageously, at least one heating unit is provided for heating the building's heating surface. For example, this unit is designed as a heat pump, in particular a brine heat pump, an air heat pump, a condensing boiler, a district heating system, a gas burner, or the like.

[0016] In a particular development of the invention, the heating unit is arranged / housed as a separate device or in a separate device housing. This advantageously allows for greater flexibility regarding the heat / energy source. For example, an air-source heat pump can be installed on a building's roof, or a brine-source heat pump with a geothermal heat exchanger can be installed in the basement or garden of the building. District heating or an external heat source can also be used to generate energy. Accordingly, a particularly efficient energy supply can be achieved.

[0017] Advantageously, the heating unit is designed as an external energy source for generating thermal energy, so that at least the domestic hot water storage tank and the domestic hot water heat exchanger device can be heated with the thermal energy of the external energy source / heating unit. This advantageously implements a dual use of the domestic hot water generation unit according to the invention, namely a single device or unit that can be used to heat the domestic hot water or the domestic hot water storage tank and simultaneously heat the building space or as a home / building heating system, using an external energy / heat source.

[0018] According to the invention, the flexibility with regard to the energy / heating sources used or usable, such as district heating / heating grids, wood or gas / oil heating, or heat pump heating such as air-water and / or brine and / or geothermal heat pump heating, etc., can be significantly increased or improved. Consequently, the domestic hot water generation unit according to the invention can be adapted to a wide variety of needs and / or conditions. This allows for use in both new buildings and existing buildings, as well as renovations or retrofits.

[0019] In an advantageous variant of the invention, a heating fluid unit and / or at least two heating fluid lines are provided / arranged between the housing / casing and the heating unit and / or the separate device and / or the separate device housing. Thus, on the one hand, a central heating unit can be provided for several domestic hot water generation units and / or apartments / residential units in a building, which can be connected to the aforementioned heating fluid unit and / or at least two heating fluid lines.

[0020] On the other hand, a separate / specific domestic hot water generation unit can be used / provided according to the invention for each apartment / residential unit. For this purpose, a building preferably comprises several residential units / apartments with at least one building room and / or living space, wherein each of the several residential units / apartments comprises a domestic hot water generation unit and a residential heating unit, a residential heat pump unit, and / or a residential cooling unit configured as the heating unit (19) and / or a separate device and / or an external energy source (19). This further improves adaptability to a wide variety of conditions.

[0021] According to the invention, the housing and / or casing comprises at least one air inlet for the inflow of room air from the building space and at least one air outlet for the outflow of room air into the building space. This allows a beneficial (active or passive) air flow and / or convection flow to be generated through the domestic hot water generation unit or along / along the building space heating surface, thereby heating the building space.

[0022] Precisely for advantageous active airflow, the heating water heat exchanger unit has at least one blower and / or a fan for generating an airflow and / or for drawing in room air from the building, particularly through the air inlet opening, and / or for expelling room air into the building, particularly through the air outlet opening. This further advantageously improves the energy transfer between the domestic hot water generation unit and the building / living space.

[0023] In an advantageous variant of the invention, at least one (internal / integrated) auxiliary heater with an electric heating element is provided for heating the drinking water in the domestic hot water storage tank. The auxiliary heater is advantageously arranged at least within and / or on and / or in the housing and / or casing, and / or the electric heating element can be switched on and / or off, in particular by means of an external electrical control signal, e.g., a photovoltaic system and / or a power meter. This advantageous, optional measure enables separate and / or direct heating of the drinking water / hot water in the storage tank, e.g., with (so-called "surplus") PV power, i.e., to increase advantageous self-consumption of PV power. This improves the economic efficiency of the overall system, while also further increasing the flexibility of hot water production.Furthermore, this measure can also be used advantageously, for example, to electrically heat the heating fluid in the event of a failure of the conventional heating source. The water-to-water heat exchanger integrated into the domestic hot water tank extracts the energy generated by the electric heating element and uses it for space heating. This is particularly advantageous as an emergency operation in the event of a failure of the conventional energy source, e.g., the failure of the district heating system or heat pump.

[0024] According to the invention, at least one cooling unit is provided for cooling a cooling surface. This also allows cooling or air conditioning of the building space / living space. For example, a heat pump, in particular a brine heat pump or preferably an air heat pump, is provided, which can be configured / used either as a heating unit or as a cooling unit.

[0025] According to the invention, the building space heating surface is designed as a cooling surface of the cooling unit.

[0026] Accordingly, on the one hand, thermal energy can be supplied to the building space via the building space heating surface, i.e. for heating / warming the building space, and on the other hand, thermal energy can be removed / extracted from the building space via the building space heating / cooling surface.

[0027] These previously listed variants of the invention reduce not only the structural but also the economic / financial expenditure, in particular by dual use of the heat pump for two functionalities of the domestic hot water generation unit according to the invention.

[0028] For this purpose, or even in principle or generally, control elements such as valves or the like and / or advantageous sensors, in particular temperature, pressure, flow, or quantity sensors, etc., can advantageously be provided. This enables, among other things, advantageous monitoring or control of the system or system unit according to the invention, in particular an electrical and / or electronic and / or semi-automated / automated mode of operation. This allows for optimized, energy-saving, and climate-friendly energy use.

[0029] Advantageously, the blower and / or fan and / or electric heating element and / or heating unit and / or cooling unit and / or cooling surface are arranged within the housing and / or casing. This allows for a particularly compact / space-saving room unit or domestic hot water generation unit in which all essential components for heating / cooling are integrated.

[0030] According to the invention, a domestic hot water generation system is realized with at least one building room, with at least one outlet fitting such as a faucet and / or shower head, and with a domestic hot water generation unit of the aforementioned type.

[0031] According to the invention, the building space is designed as a living space, so that the domestic hot water generation unit is set up / arranged in the living space, and wherein the outlet fitting is arranged in a kitchen space and / or bathroom / washroom and / or toilet room.

[0032] In a particular development of the invention, the heat pump unit has a heat pump housing, wherein fluid lines, in particular water lines, of a heating and / or cooling circuit are provided between the heat pump unit and the domestic hot water generation unit and / or the housing, wherein in particular the heat pump unit is arranged at least partially on an outer shell such as on an outer wall and / or a roof of the building and / or is located in the building, e.g. in the boiler room and / or basement or the like. The latter is particularly advantageous, for example, in the case of air-to-water heat pumps and / or brine heat pumps and / or water-to-water heat pumps and / or district heating transfer stations and / or condensing boilers or the like installed indoors.For example, a building comprises several residential units / apartments with at least one building room and / or living space, wherein each of the several residential units / apartments advantageously has a domestic hot water generation unit. Advantageously, a separate or specific heating unit / energy source can be assigned / provided in each residential unit / apartment. Alternatively, a single / common heating unit / energy source and / or heat pump unit and / or cooling unit and / or electrical or electronic control unit can be provided for the domestic hot water generation units of the several residential units / apartments. Example

[0033] An embodiment of the invention is shown in the drawing and is explained in more detail below with reference to the figures.

[0034] In detail: Figure 1 shows a first, schematic hydraulic plan of a first room unit according to the invention, Figure 2 shows a second, schematic hydraulic plan of a second room unit according to the invention, Figure 3 shows schematic side views of a third room unit according to the invention, Figure 4 shows a schematic, first floor plan of a first residential unit with a fourth room unit according to the invention, Figure 5 shows a schematic building plan with several residential units, each with a room unit according to the invention, Figure 6 shows a schematic, second floor plan of a second residential unit with a fifth room unit according to the invention and with an associated residential energy source, and Figure 7 shows a third, schematic hydraulic plan of a sixth room unit according to the invention.

[0035] In the Figures 1, 2 and 3A hydraulic diagram of a room unit 1 with a housing 2 is shown schematically. Within the housing 2, there is a hot water tank 3 and a heat exchanger 4 with a (finned) heat exchanger surface 5, wherein the heat exchanger 4 advantageously comprises a fan converter 6. With the fan converter 6, room air is sucked in through a lower inlet opening 7 of the housing 2 and directed to an upper outlet opening 8 and discharged from the housing 2.

[0036] Drinking water, thermal energy, and wastewater are supplied to and removed from the room unit 1 via connections 9. Various valves 10, some of which are electrically / motorically controlled, are provided for advantageous hydraulic routing or piping.

[0037] Furthermore, a heat exchanger 11 is provided for heating the drinking water of the storage tank 3, e.g. as a coiled tube heat exchanger 11 according to Figure 1 or as plate heat exchanger 11 according to Figure 2In addition, an optional electric heating element 12 can be provided to heat the drinking water in the storage tank 3.

[0038] In the advantageous, alternative variant according to Figure 7 One of the heat exchangers 4 is designed as an optionally installable housing wall heater 40, which heats the (metallic) wall of the housing 2 and thus the room air.

[0039] In addition, the variant according to Figure 7 In addition, temperature sensors 30, 31 are shown schematically, with which the temperature of the drinking water storage tank 3 and the room air or the interior of the housing 2 or the unit 1 (through which room air can flow) can be determined and can be used advantageously for monitoring, controlling or regulating the heating system.

[0040] According to the schematically illustrated hydraulic diagram, the room unit 1 can advantageously be designed with switching between hot water operation and heating operation both by surface heating 40 and by two air-water heat exchangers 4 equipped with a compact fan 6 and connected hydraulically in parallel, which are designed, for example, in the form of finned tube heat exchangers 4.

[0041] For control and information purposes, a display 13 can be provided, with which, for example, the room unit 1 can be configured or parameterised (cf. Figure 3 ).

[0042] In Figure 4An example of the installation and use of the room unit 1 in a two-room apartment is illustrated, which is used both for cooling and for heating the living room 14 and, if necessary, indirectly from adjacent rooms 15, for example by means of a ventilation fan 23, 24 or the like. A corridor / hallway 16 may not be heatable. On the other hand, one of the adjacent rooms 15 can be a bathroom / WC and, among other things, have a shower 17. The shower 17 draws its hot water from the room unit 1 in the living room 14 via appropriate water pipes, with an additional and optional underfloor heating system 18 or heating loops in the floor of the bathroom 15 also receiving heat energy from the room unit 1 and, for this purpose, being advantageously connected to the room unit 1 via heating pipes / lines.

[0043] In addition, Figure 4Optionally installable and / or combinable (active, electric) blowers 23, 24 or so-called "overflows" 23, 24 or fans 23, 24 are schematically shown, which can be provided to increase or improve the air exchange or air movement in the apartment and thus to improve the heat supply to rooms 14, 15, 16. These can be installed optionally in a wall of room 14, 15, 16 and / or a door of room 14, 15, 16. Alternatively, the fans 23, 24 can also be designed as passive or pressure-controlled fan valves, through openings, or the like.

[0044] REKS system with selective heat input into the living unit via the REKS room unit and heat distribution via so-called The above-mentioned active transfer fans or ventilators 23, 24 advantageously enable air exchange with another room and thus, for example, maintain a living unit at a certain temperature level. Such active "transfer fans" 23, 24 or zone ventilators are already available on the market, but are currently mostly used only to improve indoor air quality by regulating CO2 levels and relative humidity, e.g., in rooms without windows or bathrooms. According to the invention, these or fans 23, 24 in general are advantageously used for heat distribution with selective heat input, without the use of a water- or air-guided piping system. The heat is distributed by the fans or ventilators 23, 24 built into the doors / walls, which distribute or circulate the warm air.replace and thus ensure that only one heating heat output per residential unit is necessary.

[0045] Preferably, pressure equalization to the peripheral room is achieved via a fan 23, 24 in an active and / or passive manner, or via components via the door or active overflow devices 23, 24 installed in the wall without a permanently installed piping system. Particular advantages include: Alternative to water-based heat distribution, e.g. underfloor heating 18 or radiators 32, fewer structural installations required compared to the installation of a water-based heat distribution system, e.g. in the renovation of buildings 22 without water-based heat distribution.

[0046] In Figure 5 a building 22 is shown schematically in a sectional side view, which has, for example, four floors or residential units / apartments, each with a separate / own room unit 1.

[0047] The heat source 19 in the embodiment according to Figure 5 An air-source heat pump 19 (AHP) is used, which extracts heat energy from atmospheric air and supplies it to a (closed) heating circuit 20. The heating circuit 20 essentially comprises a heating flow line and a heating return line (two-pipe system), which supplies heat energy to each room unit 1 of each residential unit. A control unit 21 or a control device 21 is advantageously present, which, among other things, includes the electronic / electrical control / regulation of the system.

[0048] In Figure 6 is similar or alternative to the variant according to Figure 4 a second, exemplary installation or use of the room unit 1 in a two-room apartment is illustrated, which is used both for cooling and for heating the living room 14 and here also directly from neighboring rooms 15, for example by means of heating pipes 26, ie heating flow and heating return.

[0049] A corridor / hallway 16, in turn, may not be heated. On the other hand, one of the adjacent rooms 15 may be a bathroom / WC and, among other things, have a shower 17. The shower 17 draws its hot water from the room unit 1 of the living room 14 via a corresponding water pipe 25, whereas a sink 29 in the room 14 or the living / kitchen area 14 receives hot drinking water via a hot water pipe 25.

[0050] According to Figure 6 Additionally, underfloor heating 18 or heating loops in the floor of the bathroom 15 are provided, which also receives heat energy from the room unit 1 and is advantageously connected to the room unit 1 via heating pipes / lines 26. Additionally or optionally, the room 15 or a bedroom 15 has a so-called radiator 32 or heating element 32, which in turn receives heat energy from the room unit 1 via lines 26.

[0051] At the Figure 6In the schematically illustrated variant, each residential unit / apartment, i.e., the apartment shown, comprises a separate or dedicated energy source 27 or a separate or dedicated heat pump 27, which is arranged / fixed / suspended on the exterior wall of the apartment or building. This increases flexibility and / or improves the possibilities for retrofitting or heating renovation without great expense.

[0052] In principle, instead of a central heat source 19 (cf. Figure 5 ) a completely decentralized solution can be implemented, as is the case in Figure 6 is indicated schematically.

[0053] A corresponding hydraulic circuit can be provided in a room unit 1 with a decentralised air-water heat pump 27 (cf. Figure 6), which can be used, for example, for renovations or new construction. Room unit 1 serves as the indoor unit for the heat pump 27 and, in addition to space heating and cooling, hot water preparation, and heating circuit distribution, also advantageously controls the heat pump 27 via a bus system. Unit 1 is a so-called "all-in-one solution" for cost-effective renovations. The UWP, diaphragm expansion tank, and safety valve, etc., required for heating, can also be integrated.

[0054] Particular advantages include: no noise from the heat pump on the façade, minimal piping and installation effort, easy replacement, all components that would otherwise be installed in the flush-mounted installation or as additional devices can be integrated or avoided.

[0055] Without further explanation, a control device 21 or the control unit 21 (cf. Figure 5) in the room unit 1 or on the separate or own energy source 27 or heat pump 27, e.g. outside on the outer wall of the apartment or building.

[0056] A room unit 1 according to the invention is a complete solution for hot water preparation, heating, and cooling. The room unit 1 is advantageously designed as a heating and cooling center 1 in a residential unit, is installed directly in the living space 14, and either releases heat there or extracts heat from the room, namely via an integrated heat exchanger 4, e.g., in the form of a fan coil unit 6 with a heat exchanger surface 5 or the like.

[0057] An integrated register boiler 3 or, alternatively, a plate heat exchanger 11 with a hot water tank 3 generates and stores domestic hot water at specific times. Additional rooms 15 can be heated or cooled with hot water via the connection 9 of a heating circuit distributor or additional heat distributors. An air-to-water heat pump 19, brine-to-water heat pump, gas heater, or district heating transfer station can be used as the energy source 19 for operation.

[0058] The room unit 1 also advantageously offers the possibility of, for example, an integrated heat meter for automatic heating billing within a residential building.

[0059] In addition, domestic hot water can be prepared electrically via an optional additional electric heating element 12 integrated in the water heater 3 as an additional heater or the like, e.g. with a photovoltaic system for using your own solar power or for increasing the self-consumption of a PV system.

[0060] The room unit 1 can be installed on a wall with the appropriate connecting cables or in the corner of a room. Air is preferably drawn in from the lower area / section of the room unit or at floor level (opening 7) and heated / cooled and discharged into the room from the upper or, if applicable, the middle area / section of the unit, either directly from the front or from the top or upper end of the unit, i.e., the top view surface (opening 8).

[0061] For example, via a user interface 13 integrated into device 1, e.g., a touchscreen and / or manual switch, the room temperature target and / or time programs, etc., can be advantageously set and, if necessary, energy consumption or other / additional data / information can be read. Additional room thermostats, etc., can be connected to a suitable control or monitoring unit, i.e., the so-called "electronics" of room unit 1. This "electronics" of room unit 1 distributes / controls the heating water accordingly, for example, to additional, optional heat distributors 18 in other rooms 15.

[0062] The room units 1 can be operated with various heat / cooling generators 19. Brine-water heat pumps, air-water heat pumps 19, or other heat pumps are suitable for supplying heating and cooling water. For pure heating, district heating with a transfer station or a condensing boiler of any type can be used.

[0063] A two-pipe system 20 is advantageously sufficient for all operating conditions, e.g., consisting of one heating flow and one heating return. This advantageously separates heating / cooling and hot water operation, e.g., two hours of hot water preparation per day, with heating / cooling operation in between. If hot water supply is insufficient in between, storage tank 3 or register boiler 3 can be advantageously reheated electrically (heating element 12). Due to the decentralized hot water preparation in the residential unit, it is not necessary to install a circulation line, which saves both construction and financial effort.

[0064] An advantageous control unit 21 is, for example, an electronic unit 21 in the part of the heat generator's hydraulics located in the house, which controls the heat generator and the room units 1 in each residential unit. The control unit 21 preferably communicates with the individual devices / components 1 via a bus system. Furthermore, an existing building management system can also be integrated via a bus system. The control unit 21 coordinates, among other things, the hot water preparation, which is temporally separate from the heating / cooling operation, with the individual room units 1, e.g., hot water preparation twice a day, with heating or cooling operation in between.

[0065] The connection 9 of the device 1 is preferably made on the rear side of the housing 2, e.g. via eight connections described in the hydraulic plan (cf. Figures 1-3 ). In addition, a connection is established with the bus system to control unit 21 and an electrical power supply. Device 1 is then ready for operation.

[0066] According to the invention, the advantageous apartment stations / room units 1 for hot water preparation and heating / cooling have the function of dissipating heat and cold into the installation room 14. They are installed as directly / immediately as possible in the building room 14 or living space 14 to be heated for optimal heat distribution.

[0067] According to the invention, it is possible to realize a complete "plug&play" solution for, for example, the lowest and passive house standards, since there the selective introduction of heat and cold without additional heat distributors for the entire residential unit can be of particular advantage.

[0068] Some of the key advantages of the invention are: □ combines heating, cooling, hot water preparation and □ no heat distribution in the living space necessary, □ works with many heating sources, □ no hygiene problems and hot water circulation pipes thanks to decentralized hot water preparation, □ saves considerable installation costs through the use of a two-wire system and the integration of all necessary components in one device 1, ie within one device housing 2, □ suitable for new construction and renovation in multi-story residential buildings, □ can be installed in the final phase of the building project, □ can supply, bill and control additional heating distributors.

[0069] Thus, according to the invention, a system can be implemented, wherein the system advantageously consists of a control unit 21 and a plurality of room units 1. The control unit 21 is preferably an electronic control unit 21 and advantageously specifies to the individual room units 1 via a bus system (not shown in detail) whether they should hydraulically switch to hot water preparation mode or whether they can / should heat or cool depending on the room temperature.

[0070] The control unit 21 or the control system also consists of a specially developed hydraulic circuit with several switching valves that, in combination with a heat pump, allow the following operating modes, for example: The hydraulic circuit ensures that storage tank 3 or buffer tank 3 can be loaded at different heights with heating water heated to different temperatures. For cooling mode, buffer tank 3 is short-circuited or cold water is loaded into a separate cooling buffer tank.

[0071] Control unit 21 sets the desired flow temperature via a heat pump bus system, allowing for variations between different temperature levels in heating, hot water, and cooling modes. This can be implemented, for example, as follows: 1. Heating mode, e.g. flow temperature between 30°C and 60°C, 2. Hot water preparation mode, e.g. >55°C, 3. Cooling mode, with buffer tank 3 in bypass mode, e.g. 10-18°C.

[0072] General advantages of the system according to the invention: Heating, cooling and hot water preparation in a two-pipe system (1x heating water flow and 1x heating water return) possible (normally 4-pipe system: 2x for heating flow and return and 2x for domestic hot water circulation to the taps), heating, hot water and cooling only possible in combination with a heat pump, heating, hot water also possible with e.g. district heating transfer station or condensing boiler etc.

[0073] Advantageously, according to the invention, the room unit 1 is typically designed in such a way that it does not generate heat; it does not contain a refrigeration unit; it does not utilize waste heat for heat recovery, but rather utilizes the thermal energy contained in the heating water for hot water preparation and space heating. The hot water is (always) kept at >50°C, otherwise hygiene standards cannot be met.

[0074] The integrated space heating in room unit 1 is supplied with heating water and not with refrigerant to heat rooms 14, 15, and 16. Room unit 1 generates hot water through hydraulic connection between the heat exchanger for space heating and the heat exchanger in the hot water tank, and not through the waste heat of a cooling circuit.

[0075] The room unit 1 can not only heat but also cool rooms 14, 15, and 16. The advantageous hydraulic circuit allows switching between hot water preparation and heating / cooling operation. Thus, the special advantages and / or features of the room unit 1 according to the invention can be implemented individually or in combination: Intentionally no refrigeration circuit with compressor is integrated, therefore no deep noises which are otherwise generated by a compressor as in the prior art, different outputs can be achieved by varying the water temperature, room cooling can also be achieved by supplying cold heating water, there is no ventilation system with connection or piping to the outside area in the room unit 1, quick installation because there are no additional heat exchangers in the installation room of the room unit 1 or in the entire living unit when using active overflows 23, 24. An advantageous prerequisite for this is a correspondingly low heating requirement, as is the case, for example, in construction according to the passive house standard, due to the decentralized hot water preparation, in many cases circulation can be dispensed with, according to the invention, for exampleA domestic hot water generation unit is provided, which includes a building space heating system that transfers the thermal energy from the heating water via a water-air heat exchanger directly into the room 14, 15, 16 to be heated. In an advantageous variant, the room unit 1 uses both a finned tube heat exchanger 4 with a mounted fan 6 and at least one hydraulically connected wall heating panel in parallel, which is / are embedded, for example, in the housing 2, for example as water-guided heating coils embedded in a heat-conducting sheet. This leads to an increased proportion of radiant heat and is intended to contribute to creating an advantageously pleasant "room feeling." In the room unit 1, heat exchangers for the room heating are hydraulically switched on. This advantageously occurs depending on the flow temperature and the room temperature, e.g., in thermostat operation.

Claims

1. Hot drinking water generating facility with at least one building room, with at least one outlet fitting (17) such as a water tap and / or shower head and with a hot drinking water generating unit (1) for installing / arranging in the building room (14) and for generating hot drinking water with a hot drinking water storage tank (3) for storing and dispensing hot drinking water, in particular service water, to the outlet fitting (17), wherein at least one drinking water heat exchanger device (11) is provided for heating the drinking water of the hot drinking water storage tank (3), wherein at least the hot drinking water storage tank (3) and the drinking water heat exchanger device (11) are arranged within a housing (2) and / or a casing (2), wherein at least on the housing (2) and / or the casing (2) at least one building room heating surface (5) is provided for heating the building room (14), wherein the housing (2) and / or the casing (2) comprises at least one air inflow opening (7) for the inflow of room air of the building room (14) and at least one air outflow opening (8) for the outflow of room air into the building room (14), wherein the hot drinking water generating unit (1) is designed as a space heating element of the building room / living room (14), wherein at least one cooling unit (4, 19) is provided for cooling a cooling surface (5), wherein the building room heating surface (5) is designed as the cooling surface (5) of the cooling unit (4, 19) and wherein the building room (14) is designed as a living room (14), so that the hot drinking water generating unit is installed / arranged in the living room (14, 15, 16), and wherein the outlet fitting is arranged in a kitchen room (14) and / or bath / washroom (14, 15) and / or toilet room (14, 15).

2. Hot drinking water generating facility according to Claim 1, characterized in that at least one heating water heat exchanger unit (4) comprises the building room heating surface (5), wherein the heating water heat exchanger unit (4) is arranged within the housing (2) and / or the casing (2).

3. Hot drinking water generating facility according to one of the preceding claims, characterized in that at least one heating unit (19) is provided for heating the building room heating surface (5).

4. Hot drinking water generating facility according to Claim 3, characterized in that the heating unit (19) is designed as a separate device (19) and / or is arranged in a separate device housing.

5. Hot drinking water generating facility according to Claim 3 or 4, characterized in that the heating unit is designed as an external energy source for generating thermal energy, so that at least the hot drinking water storage tank (3) and the drinking water heat exchanger device (11) can be heated with the thermal energy of the external energy source / heating unit.

6. Hot drinking water generating facility according to one of Claims 3 to 5, characterized in that a heating fluid unit and / or at least two heating fluid lines is / are provided / arranged between the housing / casing (2) and the heating unit (19) and / or the separate device (19) and / or the separate device housing.

7. Hot drinking water generating facility according to Claim 2, characterized in that the heating water heat exchanger unit is designed as a cooling unit.

8. Hot drinking water generating facility according to one of Claims 3 to 6, characterized in that at least the heating unit is designed for generating heating energy for the building room and / or for the hot drinking water of the hot drinking water storage tank and / or in that at least one cooling unit is provided for cooling a cooling surface and / or the building room.

9. Hot drinking water generating facility according to one of Claims 3 to 6 or 8, characterized in that at least one heat pump unit comprises the heating unit and / or the cooling unit.

10. Hot drinking water generating facility according to Claim 9, characterized in that the heat pump unit has a heat pump housing, wherein fluid lines, in particular water lines, of a heating and / or cooling circuit are provided between the heat pump unit and the hot drinking water generating unit and / or the housing, wherein in particular the heat pump unit is arranged at least partially on an outer shell such as on an outer wall and / or a building roof of the building and / or in a boiler room and / or a basement room of the building.

11. Hot drinking water generating facility according to one of the preceding claims, characterized in that a building has multiple residential units / dwellings with at least one building room and / or living room (14), wherein each of the multiple residential units / dwellings (14) has in each case a hot drinking water generating unit (1) and in each case a housing heating unit (19) designed as the heating unit (19) and / or a separate device (19) and / or an external energy source (19) and / or housing heat pump unit (19) and / or housing cooling unit (19).

12. Hot drinking water generating facility according to one of the preceding claims, characterized in that a building comprises multiple residential units / dwellings (14) with at least one building room and / or living room (14), wherein each of the multiple residential units / dwellings (14) has in each case a hot drinking water generating unit (1) and wherein in particular a single / common heating unit (19), designed as the heating unit (19) and / or a separate device (19) and / or an external energy source (19), and / or heat pump unit (19) and / or cooling unit (19) is provided for the hot drinking water generating units of the multiple residential units / dwellings.