Hydraulic module for a central heating system or central heating system with the aforementioned hydraulic module

Abstract

Hydraulic module (22) for a central heating system (1), wherein the central heating system (1) has at least one primary heat source (2) operable with the aid of fuels, in particular a heating boiler and / or a gas boiler, at least one electrically operable heat pump (3), at least one water-air heat exchanger (4), preferably a heating element or a radiator for heating a building, at least one domestic water storage tank (5), in particular a boiler, for temporarily storing domestic water (11), and a piping system (7), wherein a heat transfer fluid (6), in particular water, can be heated with the aid of the primary heat source (2) and / or with the aid of the heat pump (3), wherein with the aid of the piping system (7) and with the aid of at least one pump (8, 9, 9b), in particular a heating pump (8) and / or a circulating pump (9) and / or a heat source pump (9b), the heat transfer fluid (6) is supplied to the heat pump (3) and / orin particular for its heating, can be conveyed by the primary heat source (2), wherein a heat exchanger inflow line (L, WT, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the primary heat source (2) on the one hand and to the water-air heat exchanger (4) on the other hand, so that the heat transfer fluid (6) is supplied through the heat exchanger inlet line (L WT, zu ) can be fed to the water-air heat exchanger (4), wherein a heat pump inlet line (L WP, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the water-air heat exchanger (4) on the one hand and to the heat pump (3) on the other hand, so that the heat transfer fluid (6) is supplied through the heat pump inlet pipe (L WP, zu ) of the heat pump (3), wherein a heat pump discharge line (L WP, ab) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the heat pump (3) on the one hand and to the primary heat source (2) on the other hand, so that the heat transfer fluid (6) is discharged through the heat pump discharge pipe (L WP, ab ) of the primary heat source (2), characterized in that the hydraulic module (22) comprises a heating circuit 3-way connecting piece (26.H), a heating circuit 3 / 2-way valve (21.H), a - first - 3-way connecting piece (26.1), a - first - 3 / 2-way valve (21.1), at least in sections the heat exchanger inflow line (L WT, zu ), at least in sections, the heat pump inlet line (L WP, zu ), at least in sections, the heat pump drain line (L WP, ab ), a bypass line (L By ), at least in sections a branch flow circuit inflow line (L SK, zu ), at least in sections a branch flow circuit discharge line (L SK, ab), at least in sections a domestic water discharge pipe (L BW, ab ), at least in sections a domestic water supply line (L BW, zu ), and at least one water-water heat exchanger (27), in particular a plate heat exchanger, designed in particular as a separate component.

Description

[0001] The invention relates to a hydraulic module for a central heating system having the features of the preamble of claim 1 or a central heating system having the aforementioned hydraulic module according to claim 18.

[0002] The central heating systems currently in use and / or already known or already present in buildings typically comprise at least one fuel-operated primary heat source, in particular a boiler and / or a gas boiler, at least one electrically operated heat pump, at least one water-air heat exchanger, preferably a heater or radiator for heating a building, at least one domestic hot water storage tank, in particular a boiler, for temporarily storing domestic hot water, and a piping system. A heat transfer fluid, in particular water, can be heated using the primary heat source and / or the heat pump.With the aid of the piping system and with the aid of at least one pump, in particular a heating pump and / or a circulation pump and / or a heat source pump, the heat transfer fluid can be conveyed for heating by the heat pump and / or, in particular, for heating by the primary heat source. A heat exchanger inlet line of the piping system is fluidly connected and / or connected accordingly to the primary heat source on the one hand and to the water-air heat exchanger on the other hand, so that the heat transfer fluid can be fed to the water-air heat exchanger through the heat exchanger inlet line. A heat pump inlet line of the piping system is fluidly connected and / or connected accordingly to the water-air heat exchanger on the one hand and to the heat pump on the other hand, so that the heat transfer fluid can be fed to the heat pump through the heat pump inlet line.A heat pump drain line of the piping system is fluidly connected to the heat pump on the one hand and to the primary heat source on the other hand, and / or connected accordingly, so that the heat transfer fluid can be supplied to the primary heat source through the heat pump drain line. The heat pump may already have been included in the original design of the central heating system. However, it is also conceivable that the heat pump is or will be retrofitted to a central heating system that was initially designed without a heat pump, in order to be able to save fuel during operation of the central heating system described above.

[0003] DE 32 30 940 A1 shows a central heating system with a primary heat source designed as a boiler, a heat pump, and a domestic hot water storage tank for heating domestic hot water, each of these units being assigned a pump and a heating circuit. A heat transfer fluid can be supplied to the heat pump via a heat pump inlet line, also called a return line, from, for example, an underfloor heating system. Several valves are provided so that different operating modes of the central heating system can be implemented using the boiler and the heat pump. The domestic hot water storage tank or the underfloor heating system can, in particular, also be supplied with heated heat transfer fluid using the heat pump alone. The domestic hot water storage tank or the underfloor heating system can also be supplied with heated heat transfer fluid using the boiler alone.Simultaneous operation of the heat pump and boiler is also conceivable in order to supply the underfloor heating with heated heat transfer fluid using the heat pump and the boiler. In this case, the boiler is also supplied with the heat transfer fluid heated by the heat pump. The heat pump and boiler are thus connected in series via the valves. For economic reasons, the heat pump is not operated at outside temperatures below 5°C. 30-50% of the heat requirement can be generated by the heat pump. A ready-to-install coupling unit, i.e. a hydraulic module, is provided, in which all connection connections for linking the heating boiler with the heat pump and the associated heating circuits are located.This hydraulic module of the central heating system is either delivered fully connected, in which case it sits directly on the back of the heating boiler, or the hydraulic module is delivered as a fully installed hydraulic module, which is then connected as a whole to the corresponding connections of the heating boiler.

[0004] The hydraulic module known in the prior art must be structurally adapted to the specific heating boiler and can therefore only be used with a certain type of heating boiler, which is problematic. The hydraulic module cannot therefore be flexibly used with several different types of heating boilers. This makes retrofitting heat pumps in existing central heating systems particularly difficult or problematic, as a specific hydraulic module must be designed for each type of heating boiler. Ultimately, retrofitting an existing central heating system with the aid of the described hydraulic module is only possible with great effort and / or expense, if at all. Furthermore, the heating of the domestic water in the domestic water storage tank, in particular, is not yet optimally designed.Simultaneous heating of domestic water by the heat pump and the boiler is not possible with the valves and heating circuits described above. In particular, very early on, especially since the heat pump is only designed to cover 30-50% of the heat demand, the domestic water is heated solely by the boiler using cost-intensive fuels. Fuel demand increases sharply throughout the year and is correspondingly high, especially at this time when the costs of operating the central heating system are very high.

[0005] The invention is therefore based on the object of designing and / or developing a hydraulic module for a central heating system and / or a central heating system in such a way that the problems of the prior art are minimized, or at least reduced, in particular wherein the hydraulic module and / or the central heating system can then be assembled and / or manufactured with the least possible effort and in particular the costs for operating the central heating system are then also minimized.

[0006] This object underlying the invention is now initially achieved by a hydraulic module for a central heating system having the features of claim 1.

[0007] One aspect of the invention is essentially that the hydraulic module has a heating circuit 3-way connector, a heating circuit 3 / 2-way valve, a first 3-way connector, a first 3 / 2-way valve, at least in sections the heat exchanger inflow line, at least in sections the heat pump inflow line, at least in sections the heat pump outflow line, a bypass line, at least in sections a branch flow circuit inflow line, at least in sections a branch flow circuit outflow line, at least in sections a domestic water outflow line, at least in sections a domestic water inflow line, and at least one water-water heat exchanger, in particular a plate heat exchanger, designed in particular as a separate component.

[0008] The hydraulic module greatly simplifies the installation and / or retrofitting of a central heating system. In particular, the otherwise common installation errors can be avoided, as the specific shape and / or design of the hydraulic module predetermines the relative arrangements of the pipes, connectors, heat exchangers, and / or valves. The hydraulic module is advantageously pre-assembled, for example, in a factory or at a heating engineer's, so that the installation time for the end customer, who operates the central heating system after installation, can be significantly reduced.

[0009] The hydraulic module preferably has a hydraulic module carrier, wherein the heating circuit 3-way connector, the heating circuit 3 / 2-way valve, the first 3-way connector, the first 3 / 2-way valve, in sections the heat exchanger inflow line, in sections the heat pump inflow line, in sections the heat pump outflow line, the bypass line, in sections the branch flow circuit inflow line, in sections the branch flow circuit outflow line, in sections the domestic water outflow line, in sections the domestic water inflow line, the water-water heat exchanger, and in particular a domestic water pump are formed and / or arranged in and / or on the hydraulic module carrier.

[0010] The hydraulic module carrier is, in particular, at least partially designed like a housing; in particular, the hydraulic module carrier can also be designed as a housing. By arranging the aforementioned components, in particular in the housing-like hydraulic module carrier, they are then correspondingly protected by the hydraulic module carrier and advantageously also insulated. Heat losses from the aforementioned components can thus be reduced by the housing-like hydraulic module carrier. The lines described here can be formed easily and cost-effectively with the aid of pipes and / or hoses and / or flow channels formed in the hydraulic module carrier. In other words, it is also conceivable for the hydraulic module carrier to also form pipes or lines, at least partially, with the aid of additional walls.Such walls have a certain stability and are therefore suitable for at least partially forming the hydraulic module carrier.

[0011] Further preferably, the heating circuit 3-way connector is arranged, formed, and / or interposed in the heat exchanger inlet line, and the heating circuit 3 / 2-way valve is arranged, formed, and / or interposed in the heat pump inlet line. The heating circuit 3-way connector is fluidly connected and / or connected accordingly to the heating circuit 3 / 2-way valve via the bypass line.

[0012] In a further, alternative embodiment of the hydraulic module, the heating circuit 3 / 2-way valve is arranged, formed, and / or interposed in the heat exchanger supply line, and the heating circuit 3-way connector is arranged, formed, and / or interposed in the heat pump supply line. Here, too, the heating circuit 3-way connector is fluidly connected and / or connected accordingly to the heating circuit 3 / 2-way valve via the bypass line.

[0013] There are therefore two different variants for arranging the heating circuit 3 / 2-way valve and the heating circuit 3-way connector. In the first variant, the heating circuit 3-way connector is arranged, formed, and / or interposed in the heat exchanger inflow line, and the heating circuit 3 / 2-way valve is arranged, formed, and / or interposed in the heat pump inflow line. In the second, alternative variant, the heating circuit 3 / 2-way valve is arranged, formed, and / or interposed in the heat exchanger inflow line, and the heating circuit 3-way connector is arranged, formed, and / or interposed in the heat pump inflow line.

[0014] With the help of the heating circuit 3 / 2-way valve and the heating circuit 3-way connector, the heat transfer fluid can be passed through the water-to-air heat exchanger when the hydraulic module is installed in the associated central heating system and the first valve position of the heating circuit 3 / 2-way valve is appropriate. When the hydraulic module is installed in the associated central heating system and the second valve position is appropriate, the heat transfer fluid can be passed through the bypass line past the water-to-air heat exchanger. Passing the heat transfer fluid through the water-to-air heat exchanger makes it more advantageous to heat a building. The heat transfer fluid is advantageously passed past the water-to-air heat exchanger when the domestic water is to be heated.

[0015] Preferably, the - first - 3-way connecting piece is arranged, formed and / or interposed in the heat exchanger inflow line and the - first - 3 / 2-way valve is arranged, formed and / or interposed in the heat pump outflow line.

[0016] According to a further, alternative embodiment of the hydraulic module, the - first - 3 / 2-way valve is arranged, formed and / or interposed in the heat exchanger inflow line and the - first - 3-way connecting piece is arranged, formed and / or interposed in the heat pump outflow line.

[0017] There are therefore two different variants for arranging the first 3 / 2-way valve and the first 3-way connecting piece. In the first variant, the first 3-way connecting piece is arranged, formed and / or interposed in the heat exchanger inflow line, and the first 3 / 2-way valve is arranged, formed and / or interposed in the heat pump outflow line. In the second, alternative variant, the first 3 / 2-way valve is arranged, formed and / or interposed in the heat exchanger inflow line, and the first 3-way connecting piece is arranged, formed and / or interposed in the heat pump inflow line.With the help of the first 3 / 2-way valve and the first 3-way connector, the heat transfer fluid can be passed through the water-to-water heat exchanger when the hydraulic module is installed in the associated central heating system, provided the first valve position of the first 3 / 2-way valve is set to the appropriate first position. With the second valve position of the first 3 / 2-way valve set to the appropriate second position, the heat transfer fluid can be passed past the water-to-water heat exchanger when the hydraulic module is installed in the associated central heating system. When the heat transfer fluid is passed through the water-to-water heat exchanger, the domestic water can be heated more effectively using the heat transfer fluid.

[0018] It may be advantageous if the branch flow circuit inflow line is fluidly connected to and / or connected to a first side of the water-water heat exchanger, so that the heat transfer fluid can be supplied to the first side through the branch flow circuit inflow line from the first 3 / 2-way valve or the first 3-way connector. The branch flow circuit outflow line is fluidly connected to and / or connected to the first side, so that the heat transfer fluid can be discharged through the branch flow circuit outflow line from the first side to the first 3-way connector or the first 3 / 2-way valve.

[0019] Advantageously, the domestic water outlet line is fluidly connected to a second side of the water-to-water heat exchanger and / or connected accordingly, so that the domestic water can be supplied to the second side via the domestic water outlet line, in particular with the aid of the domestic water pump. The domestic water inlet line is fluidly connected to the second side and / or connected accordingly, so that the domestic water can be discharged from the second side via the domestic water inlet line.

[0020] The energy provided by the heat pump can thus be transferred to the domestic water via the water-to-water heat exchanger. The water-to-water heat exchanger can then be optimized or is optimized to the flow rates of the heat transfer fluid through the heat pump and through the first side of the water-to-water heat exchanger in order to achieve the best possible heat transfer to the domestic water. The water-to-water heat exchanger makes the domestic water particularly flexible, namely it can be heated both in the domestic water tank itself and in the water-to-water heat exchanger. The "water-to-water" heat exchanger describes a heat exchanger which is designed to transfer heat between two fluids. These two fluids can each be water, in particular. However, it would also be referred to as a "water-to-water" heat exchanger if one of the fluids is not water, but a different type of fluid, such asa glycol-containing heat transfer fluid. This also applies analogously to the “water-air” heat exchanger. The “water-air” heat exchanger describes a heat exchanger which is designed to transfer heat between a liquid (water) and a gas (air). Instead of the liquid designed as water, a different type of liquid could be used here, such as a glycol-containing heat transfer fluid. Instead of the gas designed as air, a different type of gas could be used here. However, since the water-air heat exchanger is preferably designed as a heater or radiator for heating a building, the gas will usually be air. The respective terms “water-water” and “water-air” are intended to encompass all of the aforementioned possibilities. This should be noted.

[0021] The hydraulic module preferably has two connections for fluidic connection to the primary heat source. The hydraulic module further has two connections for fluidic connection to the heat pump. The hydraulic module further has two connections for fluidic connection to the water-air heat exchanger. The hydraulic module further has two connections for fluidic connection to the domestic hot water storage tank. The hydraulic module preferably has a total of eight connections. The connections are preferably formed and / or arranged on one, in particular the same, outer side of the hydraulic module, in particular of the hydraulic module carrier, or the outer side of the hydraulic module, in particular of the hydraulic module carrier, is formed accordingly by means of the connections.

[0022] The hydraulic module can be included in the design of the central heating system. However, it is also conceivable for the hydraulic module to be retrofitted to an existing central heating system. The hydraulic module then allows the heat pump, which is preferably also retrofitted, to be connected to the central heating system without significant effort. The hydraulic module and the heat pump are then preferably part of a so-called retrofit kit.To retrofit, only the corresponding lines, in particular the heat exchanger inflow line, the line subsequently acting as the heat pump inflow line, the line subsequently acting as the heat pump outflow line, the line subsequently acting as the domestic water outflow line and the line subsequently acting as the domestic water inflow line, must be separated and the hydraulic module and / or the heat pump must be placed accordingly in between and connected to the resulting line ends with the connections mentioned.

[0023] According to a further advantageous embodiment of the hydraulic module, all connections of the hydraulic module are arranged and / or formed on one side of the hydraulic module.

[0024] The connections aligned in this way enable a simple and quick connection to the sections of the corresponding pipes or pipe system belonging to the central heating system. This takes into account the fact that the pipes or pipe sections leading to and from the units, namely the water-air heat exchanger, the heat pump, or the primary heat source, are all arranged next to each other, especially in the building with the central heating system.

[0025] According to a further advantageous embodiment of the hydraulic module, the two connections of the hydraulic module that are to be fluidically connected to the primary heat source are arranged and / or formed on a first side of the hydraulic module. The two connections of the hydraulic module that are to be fluidically connected to the heat pump are arranged and / or formed on a second side of the hydraulic module. The two connections of the hydraulic module that are to be fluidically connected to the water-air heat exchanger are arranged and / or formed on a third side of the hydraulic module.

[0026] Even with connections aligned in this way, a simple, quick connection to the parts of the corresponding pipes or pipe system belonging to the central heating system is possible. This is especially true if the pipes or pipe sections leading to and from the units, namely the water-air heat exchanger, the heat pump, or the primary heat source, are arranged side by side, particularly in the building with the central heating system, and are arranged in pairs, offset or, in particular, at an angle to each other. Furthermore, the risk of installation errors can be further reduced, since the two connections that are to be fluidically connected to the respective units are spatially and thus also visually separated from each other.

[0027] Further preferably, the two connections of the hydraulic module to be fluidically connected to the domestic water storage tank are arranged and / or formed on the first side, the second side and / or the third side of the hydraulic module.

[0028] The two connections of the hydraulic module that are to be fluidically connected to the domestic water storage tank are arranged on the side where the connection to the domestic water discharge line and the domestic water inflow line is easiest, whereby care is also taken to ensure the simplest possible flow guidance in the hydraulic module itself with as few flow deflections as possible.

[0029] The connections are discussed in detail below. The connections can be connected to corresponding counterparts at the corresponding line ends and / or, when the hydraulic module is installed, are fluidically connected. Common connections such as flanges, threads, union nuts, and / or fittings are used, and in some cases, the corresponding counterparts at the line ends.

[0030] Advantageously, one of the two connections to be fluidically connected to the primary heat source is arranged and / or formed on the section of the heat exchanger inlet line arranged in the hydraulic module. The other of the two connections to be fluidically connected to the primary heat source is arranged and / or formed on the section of the heat pump outlet line arranged in the hydraulic module.

[0031] In particular, one of the two connections to be fluidically connected to the heat pump is arranged and / or formed on the section of the heat pump outlet line located in the hydraulic module. The other of the two connections to be fluidically connected to the heat pump is arranged and / or formed on the section of the heat pump inlet line located in the hydraulic module.

[0032] Preferably, one of the two connections to be fluidically connected to the water-air heat exchanger is arranged and / or formed on the section of the heat pump inlet line arranged in the hydraulic module. The other of the two connections to be fluidically connected to the water-air heat exchanger is arranged and / or formed on the section of the heat exchanger inlet line arranged in the hydraulic module.

[0033] According to an advantageous embodiment of the hydraulic module, one of the two connections to be fluidically connected to the domestic water storage tank is arranged and / or formed on the section of the domestic water discharge line arranged in the hydraulic module. The other of the two connections to be fluidically connected to the domestic water storage tank is arranged and / or formed on the section of the domestic water inlet line arranged in the hydraulic module.

[0034] Advantageously, a branch flow circuit of the piping system of the central heating system can be formed by means of a branch of the 3-way connector or a branch of the 3 / 2-way valve and the branch flow circuit outlet line connected to this branch, and the branch of the 3 / 2-way valve or the branch of the 3-way connector and the branch flow circuit inlet line connected to this branch. The heat transfer fluid can be pumped through the branch flow circuit by means of the at least one pump, and the domestic water can be heated by means of the water-to-water heat exchanger using the heat transfer fluid flowing through the branch flow circuit.

[0035] With the help of the first 3 / 2-way valve and the first 3-way connector, the heat transfer fluid can be directed through the branch flow circuit when the branch flow circuit hydraulic module is installed in the associated central heating system, provided the 3 / 2-way valve is in the appropriate first valve position. With the appropriate second valve position of the 3 / 2-way valve when the hydraulic module is installed in the associated central heating system, the heat transfer fluid can be prevented from flowing through the branch flow circuit, preventing the domestic water from being heated. This creates a structurally simple solution for heating the domestic water, which is also easy to implement in terms of control / regulation, requiring only the appropriate control of this first 3 / 2-way valve.This branch circuit design is particularly useful when the heat pump is being retrofitted to an existing system. Such a branch circuit can be connected or integrated into an existing system without significant effort.

[0036] The object underlying the invention is also achieved by a central heating system with a hydraulic module having the features of claim 18.

[0037] One aspect of the invention then essentially lies in the fact that the hydraulic module is fluidically connected to the piping system and / or is correspondingly connected to the piping system for the complete formation of the heat exchanger inflow line, the heat pump inflow line, the heat pump outflow line, the domestic water outflow line and the domestic water inflow line, in particular with the aid of the connections.

[0038] This minimizes the overall assembly effort required to set up the central heating system. This low assembly effort is also achieved by the fact that a particularly small number of components are required to create the piping system, such as the heating circuit 3-way connector, the heating circuit 3 / 2-way valve, the first 3-way connector, and the first 3 / 2-way valve. Nevertheless, the central heating system can be operated with minimized primary energy requirements, namely with minimized fuel requirements for the primary energy source.

[0039] The central heating system is designed to optimally control the heat pump, in particular to operate it preferentially, and to activate and / or operate the primary heat source only when the power or heat quantity provided by the heat pump is no longer sufficient, in particular to cover the demand for heating the domestic hot water storage tank and / or the water-air heat exchanger, so that the demand for fuel for the primary heat source can thus be minimized or at least reduced.

[0040] There are now numerous possibilities for advantageously designing and developing the hydraulic module according to the invention for a central heating system and the associated central heating system. Reference is made to the claims subordinate to claim 1. A preferred embodiment of the hydraulic module according to the invention for a central heating system and the associated central heating system will now be explained and described in more detail with reference to the drawing and the accompanying description. The drawing shows: Fig. 1 shows a schematic representation of a hydraulic circuit diagram of an embodiment of the central heating system with a hydraulic module according to a first embodiment, Fig. 2a shows a schematic representation of the first embodiment of the hydraulic module from Fig. 1, Fig. 2b shows a schematic representation of a second embodiment of the hydraulic module, and Fig. 2c shows a schematic representation of a third embodiment of the hydraulic module.

[0041] Fig. 1, Fig. 2a, Fig. 2b and Fig. 2c each show a hydraulic module 22 for a central heating system 1.

[0042] Fig. 1 shows the central heating system 1 with the hydraulic module 22 according to Fig. 2a.

[0043] Fig. 2a, Fig. 2b and Fig. 2c each show the hydraulic module 22 separately.

[0044] Instead of the hydraulic module 22 from Fig. 2a is in the central heating system 1 from Fig. 1 also the hydraulic module 22 from the Fig. 2b or Fig. 2c can be used, whereby the spatial arrangement of the pipes of the central heating system 1 may then be changed, whereby the hydraulic circuit diagram explicitly only shows the flow-related arrangement of the pipes and only partially or implicitly their spatial arrangement.

[0045] The central heating system 1 comprises at least one primary heat source 2 operable with the aid of fuels, in particular a heating boiler and / or a gas boiler, at least one electrically operable heat pump 3, at least one water-air heat exchanger 4, preferably a heating element or a radiator for heating a building, at least one domestic hot water storage unit 5, in particular a boiler, for temporarily storing domestic hot water 11, and a piping system 7. The water-air heat exchanger 4 could also be configured by means of or as an underfloor heating system. The heating boiler is designed, in particular, as an oil-fired boiler or as a gas-fired boiler (for example, as a "gas boiler").

[0046] A heat transfer fluid 6, in particular water, can be heated by means of the primary heat source 2 and / or by means of the heat pump 3. With the aid of the pipe system 7 and with the aid of at least one pump 8, 9, 9b, in particular a heating pump 8 and / or a circulation pump 9 and / or a heat source pump 9b, the heat transfer fluid 6 can be conveyed for heating by the heat pump 3 and / or, in particular, for heating by the primary heat source 2. A heat exchanger inflow line L WT, zu of the pipe system 7 is fluidically connectable, connected and / or connected accordingly to the primary heat source 2 on the one hand and to the water-air heat exchanger 4 on the other hand, so that the heat transfer fluid 6 is supplied through the heat exchanger inflow line L WT, zu the water-air heat exchanger 4. A heat pump inlet line L WP, zuof the pipe system 7 is fluidically connectable, connected and / or connected accordingly to the water-air heat exchanger 4 on the one hand and to the heat pump 3 on the other hand, so that the heat transfer fluid 6 is supplied through the heat pump inlet line L WP, zu can be fed to the heat pump 3. A heat pump drain line L WP, ab of the pipe system 7 is fluidically connectable, connected and / or connected accordingly to the heat pump 3 on the one hand and to the primary heat source 2 on the other hand, so that the heat transfer fluid 6 is discharged through the heat pump discharge line L WP, ab can be fed to the primary heat source 2.

[0047] During operation of the central heating system 1, the heat transfer fluid 6 can be pumped through both the heat pump 3 and the water-to-air heat exchanger 4 by means of the circulation pump 9, so that the use of the heat pump 8 is not absolutely necessary. The heat pump 8 is therefore shown as optional with dashed lines. The same applies analogously to the heat source pump 9b, which is also shown as optional with dashed lines, since one pump, in particular the circulation pump 9, may be sufficient to implement the relevant flow circuits.

[0048] Inside the domestic hot water tank 5, inside a wall of the domestic hot water tank 5 and / or outside on the wall of the domestic hot water tank 5 there is a heating pipe L HZ arranged and / or designed so that when the heat transfer fluid 6 flows through the heating line L HZThe domestic water 11 then present in the domestic water storage tank 5 can be heated with the aid of the heat transfer fluid 6. A primary heat source drain line L PQ, ab of the pipe system 7 is connected on the one hand to the primary heat source 2 and on the other hand to the heating pipe L HZ fluidically connected and / or connected accordingly, so that the heat transfer fluid 6 through the primary heat source discharge line L PQ, ab the heating cable L HZ A primary heat source supply line L PQ, zu of the pipe system 7 is connected on the one hand to the heating cable L HZ and on the other hand fluidically connected and / or connected accordingly to the primary heat source 2, so that the heat transfer fluid 6 through the primary heat source inflow line L PQ, zu the primary heat source 2. The heat exchanger inlet line L WT, zu is connected to the primary heat source drain line L PQ, abfluidically connected and / or to the primary heat source discharge line L PQ, ab connected fluidically. The heat pump drain line L WP, ab is connected to the primary heat source inflow line L PQ, zu fluidically connected and / or to the primary heat source inflow line L PQ, zu connected fluidically, in particular with the help of a primary heat source 3 / 2-way valve 21.G.

[0049] In a conventional central heating system 1 without a heat pump 3, in particular to which the heat pump 3 shown here is or will be retrofitted accordingly, the heat transfer fluid coming from a water-air heat exchanger can be supplied to the primary heat source by means of such a primary heat source 3 / 2-way valve in a second switching position. The flow path through the primary heat source 3 / 2-way valve 21.G that can be realized in the first switching position of the primary heat source 3 / 2-way valve 21.G is symbolized by the straight arrow and a Roman numeral I. The flow path through the primary heat source 3 / 2-way valve 21.G that can be realized in the second switching position of the primary heat source 3 / 2-way valve 21.G is symbolized by the curved arrow and a Roman numeral II.

[0050] The hydraulic module 22 has a heating circuit 3-way connector 26.H, a heating circuit 3 / 2-way valve 21.H, a first 3-way connector 26.1, a first 3 / 2-way valve 21.1, at least in sections the heat exchanger inflow line L WT, zu , at least in sections the heat pump inlet line L WP, zu , at least in sections the heat pump drain line L WP, ab , a bypass line L By , at least in sections a branch flow circuit inflow line L SK, zu , at least in sections a branch flow circuit discharge line L SK , ab , at least in sections a domestic water discharge pipe L BW, ab , at least in sections a domestic water supply line L BW, zu , and at least one water-water heat exchanger 27, in particular a plate heat exchanger, designed in particular as a separate component.

[0051] The hydraulic module 22 can already be provided during the design of such a central heating system 1. Furthermore, it is also conceivable for the hydraulic module 22 to be retrofitted to an existing central heating system 1. Then, with the aid of the hydraulic module 22, the heat pump 3, which is preferably also retrofitted, can be fluidically connected to the central heating system 1 without significant effort. The hydraulic module 22 and / or the heat pump 3 are then preferably part of a so-called retrofit kit.

[0052] The hydraulic module 22 has a hydraulic module carrier 22.T. In and / or on the hydraulic module carrier 22.T are the heating circuit 3-way connector 26.H, the heating circuit 3 / 2-way valve 21.H, the first 3-way connector 26.1, the first 3 / 2-way valve 21.1, and, in sections, the heat exchanger inflow line L. WT, zu , sectionally the heat pump inlet line L WP, zu, sectionally the heat pump drain line L WP , ab , the bypass line L By , in sections the branch flow circuit inflow line L SK , zu , sectionally the branch flow circuit discharge line L SK , ab , in sections the domestic water drain line L BW, ab , in sections the domestic water supply line L BW, zu , the water-water heat exchanger 27, and in particular a domestic water pump 10 are formed and / or arranged.

[0053] A 3-way connector serves to fluidically connect three lines to one another and thus has three connections, which can also be referred to as branches. 3-way connectors can be T-shaped or Y-shaped, in particular. A 3 / 2-way valve also has three connections, which can also be referred to as branches. 3 / 2-way valves can also be T-shaped or Y-shaped, in particular. By means of a 3 / 2-way valve, two different flow paths can be realized through the 3 / 2-way valve, in particular by means of a valve body of the 3 / 2-way valve. A 3 / 2-way valve, in particular its valve body, can be switched into two switching positions for this purpose. The lines or line sections described here can be formed simply and cost-effectively using pipes and / or hoses and / or flow channels formed in the hydraulic module carrier 22.T.The valves and connecting pieces described can therefore also be designed or constructed at least partially using the hydraulic module carrier 22.T.

[0054] The heating circuit 3-way connector 26.H is in accordance with Fig. 1, Fig. 2a and Fig. 2c in the heat exchanger inlet line L WT, zu arranged, designed and / or interposed here and the heating circuit 3 / 2-way valve is 21.H in the heat pump inlet line L WP, zu arranged, formed and / or interposed here. The heating circuit 3-way connector 26.H is connected via the bypass line L By fluidically connected to the heating circuit 3 / 2-way valve 21.H and / or connected accordingly.

[0055] The heating circuit 3 / 2-way valve 21.H is in accordance with Fig. 2b in the heat exchanger inlet line L WT, zuarranged, formed and / or interposed here and the heating circuit 3-way connector 26.H is in the heat pump inlet line L WP, zu arranged, designed and / or interposed here. Here, too, the heating circuit 3-way connector 26.H is connected via the bypass line L By fluidically connected to the heating circuit 3 / 2-way valve 21.H and / or connected accordingly.

[0056] The - first - 3-way connector 26.1 is according to Fig. 1, Fig. 2a and Fig. 2c in the heat exchanger inlet line L WT, zu arranged, formed and / or interposed here and the - first - 3 / 2-way valve 21.1 is in the heat pump drain line L WP, ab arranged, designed and / or interposed here.

[0057] The - first - 3 / 2-way valve 21.1 is according to Fig. 2b in the heat exchanger inlet line L WT, zuarranged, formed and / or interposed here and the - first - 3-way connector 26.1 is in the heat pump drain line L WP , ab arranged, designed and / or interposed here.

[0058] Fig. 1, Fig. 2a and Fig. 2c thus each show a first variant of the possible arrangements of the heating circuit 3-way connecting piece 26.H, the heating circuit 3 / 2-way valve 21.H, the - first - 3-way connecting piece 26.1 and the - first - 3 / 2-way valve 21.1.

[0059] Fig. Figure 2b shows a second variant of the possible arrangements of the heating circuit 3-way connector 26.H, the heating circuit 3 / 2-way valve 21.H, the - first - 3-way connector 26.1 and the - first - 3 / 2-way valve 21.1.

[0060] Combinations of these variants are also conceivable. For example, according to a third variant, the heating circuit 3-way connector 26.H and the heating circuit 3 / 2-way valve 21.H are arranged according to the first variant, and the first 3-way connector 26.1 and the first 3 / 2-way valve 21.1 are arranged according to the second variant. Conversely, according to a fourth variant, the heating circuit 3-way connector 26.H and the heating circuit 3 / 2-way valve 21.H could also be arranged according to the second variant, and the first 3-way connector 26.1 and the first 3 / 2-way valve 21.1 could be arranged according to the first variant.

[0061] The branch flow circuit inflow line L SK, zu is fluidically connected to a first side 27.1 of the water-water heat exchanger 27 and / or connected thereto, so that the heat transfer fluid 6 is fed through the branch flow circuit inflow line L SK , zuthe first side 27.1 from the first 3 / 2-way valve 21.1 or the first 3-way connector 26.1. The branch flow circuit drain line L SK , ab is fluidically connected to the first side 27.1 and / or connected here, so that the heat transfer fluid 6 is discharged through the branch flow circuit discharge line L SK , ab from the first side 27.1 to the - first - 3-way connecting piece 26.1 or the - first - 3 / 2-way valve 21.1.

[0062] The domestic water drain line L BW, ab is fluidically connected and / or connected accordingly to a second side 27.2 of the water-water heat exchanger 27, so that the domestic water 11 is discharged through the domestic water discharge line L BW, ab the second side 27.2, in particular with the help of the domestic water pump 10. The domestic water supply line L BW, zuis fluidically connected to the second side 27.2 and / or connected accordingly, so that the domestic water 11 is supplied through the domestic water inlet line L BW, zu can be derived from the second page 27.2.

[0063] A hot water pipe 17a is in accordance with Fig. 1 outside the hydraulic module 22 with the service water drain line L BW, ab fluidically connected and / or to the domestic water drain line L BW, ab connected. A cold water line 17b of the hydraulic module 22 is also connected outside the hydraulic module 22 to the service water supply line L BW, zu fluidically connected and / or to the domestic water inlet line L BW, zuconnected. Heated domestic water 11, e.g., for a shower, can be drawn from the domestic water storage tank 5 via the hot water line 17a. Fresh, "cold" domestic water 11 can be supplied to the domestic water storage tank 5 via the cold water line 17b, particularly during or after domestic water 11, e.g., for a shower, has been drawn from the domestic water storage tank 5, in order to refill the domestic water storage tank 5 via the cold water line 17b. For the sake of simplicity, corresponding control and / or check valves in the hot water line 17a and in the cold water line 17b are not explicitly shown.

[0064] The hydraulic module 22 has two connections 22.A1, 22.A2 that are fluidically connected to the primary heat source 2. The hydraulic module 22 has two connections 22.A3, 22.A4 that are fluidically connected to the heat pump 3. The hydraulic module 22 has two connections 22.A5, 22.A6 that are fluidically connected to the water-air heat exchanger 4. The hydraulic module 22 also has two connections 22.A7, 22.A8 that are fluidically connected to the domestic hot water tank 5.

[0065] The hydraulic module 22, in particular the hydraulic module carrier 22.T, is in particular substantially cuboid-shaped and / or has a cuboid-shaped outer boundary surface, wherein the boundary surface can actually be formed by the hydraulic module carrier 22.T. However, it is also possible for a merely imaginary outer surface of a cuboid to penetrate the connections 22.A1 to 22.A8. Such a cuboid has a rear side, a front side, and four sides 22.S1 to 22.S4.

[0066] In the hydraulic circuit diagrams of the Fig. 1, Fig. 2a, Fig. 2b and Fig. As already mentioned at the beginning, only the fluidic arrangement of the lines is explicitly shown in Figure 2c, but at least the spatial arrangement of the connections assigned to the lines is shown here, at least with reference to sides 22.S1 to 22.S4 of the hydraulic module 22.

[0067] According to Fig. 2c, all connections of the hydraulic module 22 are arranged and / or formed on the same side of the hydraulic module 22, namely according to Fig. 2c are arranged and / or formed on the second side 22.S2. In particular, this means that an imaginary plane penetrates all of these connections of the hydraulic module 22.

[0068] According to Fig. 2a and Fig. 2b, the two connections 22.A1, 22.A2 of the hydraulic module 22 to be fluidically connected to the primary heat source 2 are arranged and / or formed on a first side 22.S1 of the hydraulic module 22, the two connections 22.A3, 22.A4 of the hydraulic module 22 to be fluidically connected to the heat pump 3 are arranged and / or formed on a second side 22.S2 of the hydraulic module 22, and the two connections 22.A5, 22.A6 of the hydraulic module 22 to be fluidically connected to the water-air heat exchanger 4 are arranged and / or formed on a third side 22.S3 of the hydraulic module 22. The two connections 22.A7, 22.A8 of the hydraulic module 22, which are to be fluidically connected to the domestic hot water tank 5, are then arranged and / or formed on the first side 22.S1, on the second side 22.S2 and / or on the third side 22.S3 of the hydraulic module 22. According to Fig. 2a, Fig. 2b and Fig. 2c, the two connections 22.A7, 22.A8 of the hydraulic module 22, which are to be fluidically connected to the domestic hot water tank 5, are arranged and / or formed on the second side 22.S2 of the hydraulic module 22. In particular, this means that an imaginary plane penetrates all connections arranged and / or formed on one side of the hydraulic module 22.

[0069] One of the two connections 22.A1 to be fluidically connected to the primary heat source 2 is arranged on the section of the heat exchanger inflow line L in the hydraulic module 22 WT, zu arranged and / or formed. The other of the two connections 22.A2 to be fluidically connected to the primary heat source 2 is arranged on the section of the heat pump discharge line L arranged in the hydraulic module 22 WP, ab arranged and / or formed.

[0070] One of the two connections 22.A3 to be fluidically connected to the heat pump 3 is located on the section of the heat pump discharge line L arranged in the hydraulic module 22 WP, ab arranged and / or formed. The other of the two connections 22.A4 to be fluidically connected to the heat pump 3 is arranged on the section of the heat pump inlet line L arranged in the hydraulic module 22 WP , zu arranged and / or formed.

[0071] One of the two connections 22.A5 to be fluidically connected to the water-air heat exchanger 4 is located on the section of the heat pump inlet line L arranged in the hydraulic module 22 WP , zu arranged and / or formed. The other of the two connections 22.A6 to be fluidically connected to the water-air heat exchanger 4 is arranged on the section of the heat exchanger inlet line L arranged in the hydraulic module 22. WT, zu arranged and / or formed.

[0072] One of the two connections 22.A7 to be fluidically connected to the domestic water storage tank 5 is located on the section of the domestic water discharge line L arranged in the hydraulic module 22 BW, ab arranged and / or formed. The other of the two connections 22.A8 to be fluidically connected to the domestic water storage tank 5 is arranged on the section of the domestic water inflow line L arranged in the hydraulic module 22. BW, zu arranged and / or formed.

[0073] By means of a branch of the 3-way connector 26.1 or a branch of the 3 / 2-way valve 21.1 and the branch flow circuit drain line L connected to this branch SK , ab and the branch of the 3 / 2-way valve 21.1 or the branch of the 3-way connector 26.1 and the branch flow circuit inflow line L connected to this branch SK , zu is a branch flow circuit K ABof the piping system 7 of the central heating system 1. The heat transfer fluid 6 is pumped through the branch flow circuit K by means of at least one pump 8, 9, 9b. AB With the help of the branch flow circuit K AB flowing heat transfer fluid 6, the domestic water 11 can be heated with the aid of the water-water heat exchanger 27.

[0074] In a first switching position of the first 3 / 2-way valve 21.1, the heat transfer fluid 6 is flowed through the branch flow circuit K AB conveyable and in a second switching position of the first 3 / 2-way valve 21.1, the flow of the heat transfer fluid 6 through the branch flow circuit K ABin particular, at least partially, preferably completely avoidable. The flow path through the first 3 / 2-way valve 21.1 that can be realized in the first switching position of the first 3 / 2-way valve 21.1 is symbolized by the curved arrow and a Roman numeral I. The flow path through the first 3 / 2-way valve 21.1 that can be realized in the second switching position of the first 3 / 2-way valve 21.1 is symbolized by the straight arrow and a Roman numeral II.

[0075] The 3 / 2-way valves advantageously have "longer" switching times of 20s to 30s for the implementation of a switching process between the respective first switching position I and the second switching position II, which can prevent or at least reduce pressure surges in the line system 7. During the switching process, flow through the respective 3 / 2-way valve is possible between all its connections.

[0076] The hydraulic module 22 is used to complete the heat exchanger inflow line L WT , zu , the heat pump inlet line L WP, zu , the heat pump drain line L WP , ab , the domestic water drain line L BW, ab and the domestic water inlet line L BW, zu , in particular by means of the connections 22.A1 - 22.A8, fluidically connected to the line system 7 and / or connected accordingly to the line system 7.

[0077] As described above, the lines are arranged and / or formed, in particular, partially in and / or on the hydraulic module 22. In particular, the heat pump 3 can be particularly easily retrofitted to an existing central heating system 1 with only one primary heat source 2 using the hydraulic module. To do so, only the corresponding lines need to be separated, the hydraulic module 22 inserted between them and fluidically connected to the resulting line ends.

[0078] The primary heat source 2 and the domestic hot water storage tank 5 have, as shown in Fig. 1 has a common integral housing 28. The heating cable L HZ , the primary heat source drain line L PQ, ab and the primary heat source inflow line L PQ, zuare arranged, in particular completely, within the integral housing 28. The domestic water 11 can be heated via the water-water heat exchanger 27, in particular with the aid of the heat pump 3. The water-water heat exchanger 27 is used in particular because a "direct" connection of the heat pump 3 to the heating line L HZ of the domestic hot water storage tank 5 would not be possible or would only be possible with excessive effort. This is particularly the case because the primary heat source 2 and the domestic hot water storage tank have the aforementioned common integral housing 28. In this case, the heating line L HZ , the primary heat source drain line L PQ, ab and the primary heat source inflow line L pQ, zu , in particular completely, arranged within the integral housing 28 and thus not easily accessible.

[0079] The hydraulic module 22 is preferably arranged with its rear side against a wall of a building. The front side of the hydraulic module 22 is then formed essentially parallel to the wall. The first side 22.S1 then forms a bottom side of the hydraulic module 22. The second side 22.S2 then forms a right-hand longitudinal side of the hydraulic module 22, as seen from the front. The third side 22.S3 then forms a top side of the hydraulic module 22. The hydraulic module 22, in particular the hydraulic module carrier 22, can also be arranged on the integral housing 28 and / or connected to the integral housing 28. The hydraulic module 22 can then be arranged inside the integral housing 28, outside the integral housing 28, or penetrating a wall of the integral housing 28.

[0080] The hydraulic module carrier 22 is in particular at least partially designed like a housing and in particular has at least one recess structure with a plurality of recess areas for receiving lines, e.g. L WT, zu , L SK , zu , L SK , ab , L WP, zu , L WP, ab , L BW, zu , L BW, ab , L By, connecting pieces 26.1, 26.H, valves 21.1, 21.H, the water-water heat exchanger 27, the circulation pump 9 and / or the domestic water pump 10. The recess structure is thus formed as a cavity in the assembled housing-like hydraulic module carrier 22.T. The housing-like hydraulic module carrier 22.T has, in particular, a base body and a cover. The recess structure is then completely formed in the assembled state of the housing-like hydraulic module carrier 22.T, partly with the aid of the base body and partly with the aid of the cover. The housing-like hydraulic module carrier 22.T has, in particular, a foamed plastic such as Styrofoam, so that good thermal insulation is realized by means of the housing-like hydraulic module carrier 22.T. The base body and the lid are preferably made in one piece, e.g. using the aforementioned foamed plastic, in particular Styrofoam.In contrast, it is also conceivable that the housing-like hydraulic module carrier 22.T is designed with outer walls which, for example, comprise steel and / or wood, and to which the elements of the hydraulic module 22 are connected.

[0081] In particular with reference to Fig. 1, the following may be noted regarding the positioning and / or arrangement of the check valves provided and / or arranged here in the piping system 7 for the realisation of the flow paths and / or flow circuits: How Fig. 1, the central heating system 1 comprises at least one first check valve 29 which is arranged in the branch flow circuit inlet line L SK , zu Furthermore, a second check valve 31 is arranged in the domestic water drain line L BW, abarranged, in particular in terms of flow, upstream of the domestic water pump 10. The first and second check valves 29, 31 prevent a corresponding backflow of the heat transfer fluid 6 or the domestic water 11. The designation “first” or “second” check valve is not restrictive here, but this designation / numbering of the check valves merely serves to designate them more precisely, and this may also be pointed out.

[0082] In the following, possible flow paths of the heat transfer fluid 6 through the central heating system 1, namely in particular the branch flow circuit K AB and a first and second heating circuit, described in more detail: A branch flow circuit K AB according to the Fig. The embodiment of the central heating system 1 shown in Figure 1 is designed such that a flow of the heat transfer fluid 6 from the heat pump 3, via the circulation pump 9, via the first 3 / 2-way valve 21.1 in its first switching position I, via the branch flow circuit inflow line L SK , zu , via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit drain line L SK , ab , via the first 3-way connector 26.1, via the heating circuit 3-way connector 26.H, via the heating circuit 3 / 2-way valve 21.H in its second switching position II and back to the heat pump 3. With the help of the branch flow circuit K AB according to Fig. 1 is also a flow of the heat transfer fluid 6 from the heat pump 3, via the circulation pump 9, via the first 3 / 2-way valve 21.1 in its first switching position I, via the branch flow circuit inflow line L SK , zu, via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit drain line L SK , ab , via the first 3-way connecting piece 26.1, via the heating circuit 3-way connecting piece 26.H, via the water-air heat exchanger 4, via the heating circuit 3 / 2-way valve 21.H in its first switching position I and back to the heat pump 3.

[0083] Thus, the domestic water 11 can be heated, in particular "indirectly," with the aid of the water-to-water heat exchanger 27. However, during operation, either the domestic water 11 or the water-to-air heat exchanger 4 is preferably heated by means of the respective central heating system 1.

[0084] Only the heating of the water-air heat exchanger 4 is made possible by means of the formation of a first heating circuit, wherein in the first heating circuit according to Fig. 1, a flow of the heat transfer fluid 6 from the heat pump 3, via the circulation pump 9, via the first 3 / 2-way valve 21.1 in its second switching position II, in particular via the primary heat source 3 / 2-way valve 21.G in a second switching position II, in particular via the heat source pump 9b, via the primary heat source 2, via the first 3-way connecting piece 26.1, via the heating circuit 3-way connecting piece 26.H, via the water-air heat exchanger 4, via the heating circuit 3 / 2-way valve 21.H in its first switching position I, and back to the heat pump 3 can be realized. Thus, the heat transfer fluid 6 preheated by the heat pump 3 can be fully supplied to the primary heat source 2. The heat transfer fluid 6 can be heated by the heat pump 3 and the primary heat source 2.However, the primary heat source 2 can also be flowed through by the heat transfer fluid 6 without the heat transfer fluid 6 being heated by the primary heat source 2 during this flow, in particular without the primary heat source 2 being actively operated.

[0085] In a further, second heating circuit, according to the Fig. 1 a flow of the heat transfer fluid 6 from the primary heat source 2, via the domestic hot water storage tank 5 or via the heating line L HZ , in particular via the primary heat source 3 / 2-way valve 21.G in its first switching position I, via the heat source pump 9b and back to the primary heat source 2. The heat source pump 9b is necessary to form the second heating circuit. The first heating circuit and the branch flow circuits K AB can also be realized using only the circulation pump 9. The respective branch flow circuit K ABand the second heating circuit can be implemented at least partially simultaneously, in which case the domestic water 11 can be heated both by means of the heat pump 3 and by means of the primary heat source 2.

[0086] The respective branch flow circuit K AB and the second heating circuit or the respective flow paths that can be realized thereby are, in particular, completely separated or separable from one another.

[0087] The branch flow circuits K described above AB and heating circuits can be realized in the same way as described above, if instead of the hydraulic module 22 according to Fig. 2a the hydraulic module 22 to Fig. 2c in the central heating system 1 from Fig. 1 is used.

[0088] The branch flow circuits K described above AB and heating circuits can be implemented analogously to the above description, if instead of the hydraulic module 22 according to Fig. 2a the hydraulic module 22 to Fig. 2b in the central heating system 1 from Fig. 1 is used, whereby the position of the first 3 / 2-way valve 21.1 is swapped with that of the first 3-way connector 26.1, and instead of the first 3 / 2-way valve 21.1, the flow passes through the first 3-way connector 26.1 in the same way as the first 3 / 2-way valve 21.1, and vice versa. Furthermore, the position of the heating circuit 3 / 2-way valve 21.H is swapped with that of the heating circuit 3-way connector 26.H, and instead of the heating circuit 3 / 2-way valve 21.H, the flow passes through the heating circuit 3-way connector 26.H in the same way as the heating circuit 3 / 2-way valve 21.H, and vice versa.

[0089] A temperature sensor 13.1 is located in a - vertically viewed - lower area of ​​the domestic hot water tank 5 or adjacent to this - vertically viewed - lower area of ​​the domestic hot water tank 5 for determining the actual domestic hot water temperature T B1The temperature sensor 13.1 is connected to a heat pump control and / or regulating device 14 for control, signal, and / or data purposes. The heat pump 3 is connected to the heat pump control and / or regulating device 14 for control purposes. The heat pump control and / or regulating device 14 is designed and / or constructed such that the heat pump 3, depending on the determined actual domestic water temperature T B1 is controllable and / or adjustable. In particular, a central heating control and / or regulation device 12 is connected to the primary heat source 2 for its control and / or regulation. All control / signal / and / or data connections are symbolized here by dashed, possibly broken, lines.

[0090] The temperature sensor 13.1 is designed as a first temperature sensor 13.1 for determining a first actual domestic water temperature T B1A second temperature sensor 13.2 is arranged in a - vertically viewed - middle or upper area of ​​the domestic hot water tank 5 for measuring a second, preferably average actual domestic hot water temperature T B2 The second temperature sensor 13.2 is connected to the central heating control and / or regulation device 12 for control, signal, and / or data purposes. The central heating control and / or regulation device 12 is designed and / or constructed such that the primary heat source 2 is controlled as a function of the second actual domestic water temperature T B2 is controllable and / or adjustable.

[0091] The heat pump control and / or regulating device 14 is designed and / or constructed such that the heat pump 3 can be operated and / or activated with the aid of the heat pump control and / or regulating device 14 to heat the heat transfer fluid 6 when the first actual domestic water temperature T measured, determined and / or calculated, in particular by the heat pump control and / or regulating device 14, with the aid of the first temperature sensor 13.1 B1 falls below a first limit temperature.

[0092] The central heating control and / or regulating device 12 is designed and / or constructed such that the primary heat source 2 can be operated and / or activated with the aid of the central heating control and / or regulating device 12 to heat the heat transfer fluid 6 when the second actual domestic water temperature T measured, determined and / or calculated with the aid of the second temperature sensor 13.2 B2falls below a second limit temperature.

[0093] In principle, the control and / or regulation of the heat pump 3 and the primary heat source 2 takes place independently of one another. This means, in particular, that no parameters and / or measured values ​​for controlling the primary heat source 2, such as a fuel supply level, are then available in the heat pump control and / or regulation device 14. On the other hand, in particular, no operating data and / or parameters of the heat pump 3 are available in the central heating control and / or regulation device 12. The control of the primary heat source 2 takes place, in particular exclusively with the aid of the central heating control and / or regulation device 12, wherein the control of the heat pump 3 takes place, in particular exclusively with the aid of the heat pump control and / or regulation device 14.A particularly indirect dependency between the control and / or regulation of the heat pump 3 and the primary heat source 2 arises in particular solely through the selection of the two limit temperatures relative to one another and through the specific arrangement of the two associated temperature sensors 13.1, 13.2 relative to one another. The first temperature sensor 13.1 - viewed vertically - is arranged in particular in the lower half and the second temperature sensor 13.2 - viewed vertically - is arranged in the upper half of the domestic hot water tank 5 relative to the total vertical height of the domestic hot water tank 5, or the respective actual temperatures of the domestic hot water 11 are determined there.

[0094] Because the first temperature sensor 13.1 measures the first actual domestic water temperature T B1If the measured temperature is determined in the lower area of ​​the domestic hot water storage tank 11 (viewed vertically), the heat pump 3 can be quickly activated without a significant time delay and without extensive and complex control effort using the heat pump control and / or regulation device 14. This helps to avoid initially activating the primary heat source 2, which in turn can save fuel.

[0095] In particular, the primary heat source 2 is operated and / or activated with the aid of the central heating control and / or regulation device 12 for heating the heat transfer fluid 6 only when, in particular, a heat demand of the domestic hot water storage tank 5 exceeds a heat quantity that can be provided by the heat pump 3 at maximum power. This is ensured in particular by the first actual domestic hot water temperature T B1 - viewed vertically - below the second actual domestic water temperature T B2is measured. In particular, when the output of the heat pump 3 is sufficient to cover the heat demand of the domestic hot water storage tank 5, the second actual domestic hot water temperature T B2 not fall below a certain previously defined second limit temperature and the primary source 2 does not have to be activated and therefore does not have to be operated with the combustion of fuels.

[0096] With the one here in Fig. 1, it is therefore particularly feasible that the primary source 2 is activated neither too early nor too late in order to save fuel and to ensure a comfortable temperature control of the domestic water 11 taken from the domestic water storage tank 5, whereby, in particular with the aid of the hydraulic module 22 described above, already existing central heating systems 1 can be retrofitted and / or converted or retrofitted in a simple manner and without great effort, so that in particular the Fig. 1 accordingly equipped and / or operable central heating system 1 can be realized.

[0097] But even in a "normal heating operation", namely when the first heating circuit of the central heating system 1 is formed, i.e. when the domestic water 11 does not need to be heated and, for example, only the heat transfer fluid 6 needs to be heated to operate the water-air heat exchanger 4, the heat pump 3 in particular can and will always be used preferentially before the primary heat source 2 to heat the heat transfer fluid 6 or activated and / or controlled accordingly; this should also be pointed out. List of reference symbols 1 central heating system 2 Primary heat source 3 heat pump 4 water-air heat exchangers 5 domestic hot water storage tanks 6 Heat transfer fluid 7 Pipeline system 8 heating pump 9 Circulation pump 9b Heat source pump 10 domestic water pump 11 Domestic water 12 Central heating control and / or regulation device 13.1 first temperature sensor 13.2 second temperature sensor 14 Heat pump control and / or regulation device 17a Hot water pipe 17b Cold water pipe 21.1 first 3 / 2-way valve 21.H Heating circuit 3 / 2-way valve 21.G Primary heat source 3 / 2-way valve 22 Hydraulic module 22.T hydraulic module carrier 22.S1 first side of the hydraulic module 22 22.S2 second side of the hydraulic module 22 22.S3 third side of the hydraulic module 22 22.S4 fourth side of the hydraulic module 22 22.A1 - 22.A8 Connections of the hydraulic module 22 26.1 first 3-way connector 26.H Heating circuit 3-way connector 27 water-water heat exchangers 27.1 First side of the water-water heat exchanger 27 27.2 second side of the water-water heat exchanger 27 28 integral housings 29 Check valve 31 Check valve K AB Branch flow circuit T B1 first actual domestic water temperature T B2 second actual domestic water temperature L WT, zu Heat exchanger inflow line L WP, zu Heat pump inflow line L WP, ab Heat pump drain line L By Bypass line L HZ Heating cable L PQ, ab Primary heat source drain line L PQ, zu Primary heat source inflow line L SK , zu Branch flow circuit inflow line L SK , ab Branch flow circuit drain line L BW, ab Domestic water drain line L BW, zu Domestic water supply line I first switching position of the respective valve II second switching position of the respective valve QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 32 30 940 A1

[0003]

Claims

[1] Hydraulic module (22) for a central heating system (1), wherein the central heating system (1) has at least one primary heat source (2) operable with the aid of fuels, in particular a heating boiler and / or a gas boiler, at least one electrically operable heat pump (3), at least one water-air heat exchanger (4), preferably a heating element or a radiator for heating a building, at least one domestic water storage tank (5), in particular a boiler, for temporarily storing domestic water (11), and a piping system (7), wherein a heat transfer fluid (6), in particular water, can be heated with the aid of the primary heat source (2) and / or with the aid of the heat pump (3), wherein with the aid of the piping system (7) and with the aid of at least one pump (8, 9, 9b), in particular a heating pump (8) and / or a circulating pump (9) and / or a heat source pump (9b), the heat transfer fluid (6) is conveyed to the heat pump (3) for heating. and / or,in particular for its heating, can be conveyed by the primary heat source (2), wherein a heat exchanger inflow line (L, WT, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the primary heat source (2) on the one hand and to the water-air heat exchanger (4) on the other hand, so that the heat transfer fluid (6) is supplied through the heat exchanger inlet line (L WT, zu ) can be fed to the water-air heat exchanger (4), wherein a heat pump inlet line (L WP, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the water-air heat exchanger (4) on the one hand and to the heat pump (3) on the other hand, so that the heat transfer fluid (6) is supplied through the heat pump inlet pipe (L WP, zu ) of the heat pump (3), wherein a heat pump discharge line (L WP, ab) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the heat pump (3) on the one hand and to the primary heat source (2) on the other hand, so that the heat transfer fluid (6) is discharged through the heat pump discharge pipe (L WP, ab ) can be fed to the primary heat source (2), characterized by that the hydraulic module (22) comprises a heating circuit 3-way connecting piece (26.H), a heating circuit 3 / 2-way valve (21.H), a - first - 3-way connecting piece (26.1), a - first - 3 / 2-way valve (21.1), at least in sections the heat exchanger inflow line (L WT, zu ), at least in sections, the heat pump inlet line (L WP, zu ), at least in sections, the heat pump drain line (L WP, ab ), a bypass line (L By ), at least in sections a branch flow circuit inflow line (L SK, zu ), at least in sections a branch flow circuit discharge line (L SK, ab), at least in sections a domestic water discharge pipe (L BW, ab ), at least in sections a domestic water supply line (L BW, zu ), and at least one water-water heat exchanger (27), in particular a plate heat exchanger, designed in particular as a separate component. [2] Hydraulic module (22) according to claim 1, characterized by that the hydraulic module (22) has a hydraulic module carrier (22.T), wherein in and / or on the hydraulic module carrier (22.T) the heating circuit 3-way connecting piece (26.H), the heating circuit 3 / 2-way valve (21.H), the - first - 3-way connecting piece (26.1), the - first - 3 / 2-way valve (21.1), in sections the heat exchanger inflow line (L WT, zu ), sectionally the heat pump inlet line (L WP, zu ), section by section the heat pump drain line (L WP, ab ), the bypass line (L By ), in sections the branch flow circuit inflow line (L SK, zu), section by section, the branch flow circuit discharge line (L SK, ab ), in sections the domestic water drain pipe (L BW, ab ), in sections the domestic water inlet pipe (L BW, zu ), the water-water heat exchanger (27), and in particular a domestic water pump (10) are designed and / or arranged. [3] Hydraulic module (22) according to claim 1 or 2, characterized by that the heating circuit 3-way connector (26.H) in the heat exchanger inlet line (L WT, zu ) is arranged, formed and / or interposed here and the heating circuit 3 / 2-way valve (21.H) in the heat pump inlet line (L WP, zu ) is arranged, formed and / or interposed here, wherein the heating circuit 3-way connecting piece (26.H) is connected via the bypass line (L By ) is fluidically connected to the heating circuit 3 / 2-way valve (21.H) and / or connected accordingly. [4] Hydraulic module (22) according to claim 1 or 2, characterized bythat the heating circuit 3 / 2-way valve (21.H) in the heat exchanger inlet line (L WT, zu ) is arranged, formed and / or interposed here and the heating circuit 3-way connector (26.H) in the heat pump inlet line (L WP, zu ) is arranged, formed and / or interposed here, wherein the heating circuit 3-way connecting piece (26.H) is connected via the bypass line (L By ) is fluidically connected to the heating circuit 3 / 2-way valve (21.H) and / or connected accordingly. [5] Hydraulic module (22) according to one of claims 1 to 4, characterized by that the - first - 3-way connector (26.1) in the heat exchanger inlet line (L WT, zu ) is arranged, formed and / or interposed here and the - first - 3 / 2-way valve (21.1) in the heat pump discharge line (L WP, ab ) is arranged, designed and / or interposed here. [6] Hydraulic module (22) according to one of claims 1 to 4, characterized by that the - first - 3 / 2-way valve (21.1) in the heat exchanger inlet line (L WT, zu ) is arranged, formed and / or interposed here and the - first - 3-way connecting piece (26.1) in the heat pump discharge line (L WP, ab ) is arranged, designed and / or interposed here. [7] Hydraulic module (22) according to one of claims 1 to 6, characterized by that the branch flow circuit inflow line (L SK, zu ) is fluidically connected to a first side (27.1) of the water-water heat exchanger (27) and / or connected thereto, so that the heat transfer fluid (6) is supplied through the branch flow circuit inflow line (L SK, zu ) of the first side (27.1) from the - first - 3 / 2-way valve (21.1) or the - first - 3-way connecting piece (26.1), wherein the branch flow circuit discharge line (L SK, ab) is fluidically connected to the first side (27.1) and / or connected thereto, so that the heat transfer fluid (6) is discharged through the branch flow circuit discharge line (L SK,ab ) from the first side (27.1) to the - first - 3-way connecting piece (26.1) or the - first - 3 / 2-way valve (21.1). [8] Hydraulic module (22) according to one of claims 1 to 7, characterized by that the domestic water drain pipe (L BW, ab ) is fluidically connected and / or connected accordingly to a second side (27.2) of the water-water heat exchanger (27), so that the domestic water (11) is discharged through the domestic water discharge line (L BW, ab ) of the second side (27.2), in particular with the aid of the domestic water pump (10), and wherein the domestic water inlet line (L BW, zu) is fluidically connected to the second side (27.2) and / or connected accordingly, so that the domestic water (11) flows through the domestic water inlet line (L BW, zu ) can be discharged from the second side (27.2). [9] Hydraulic module (22) according to one of claims 1 to 8, characterized by that the hydraulic module (22) has two connections (22.A1, 22.A2) to be fluidically connected to the primary heat source (2), wherein the hydraulic module (22) has two connections (22.A3, 22.A4) to be fluidically connected to the heat pump (3), wherein the hydraulic module (22) has two connections (22.A5, 22.A6) to be fluidically connected to the water-air heat exchanger (4), and wherein the hydraulic module (22) has two connections (22.A7, 22.A8) to be fluidically connected to the domestic hot water storage tank (5). [10] Hydraulic module (22) according to claim 9, characterized bythat all connections of the hydraulic module (22) are arranged and / or formed on one side of the hydraulic module (22). [11] Hydraulic module (22) according to claim 9, characterized by in that the two connections (22.A1, 22.A2) of the hydraulic module (22) to be fluidically connected to the primary heat source (2) are arranged and / or formed on a first side (22.S1) of the hydraulic module (22), wherein the two connections (22.A3, 22.A4) of the hydraulic module (22) to be fluidically connected to the heat pump (3) are arranged and / or formed on a second side (22.S2) of the hydraulic module (22), wherein the two connections (22.A5, 22.A6) of the hydraulic module (22) to be fluidically connected to the water-air heat exchanger (4) are arranged and / or formed on a third side (22.S3) of the hydraulic module (22). [12] Hydraulic module (22) according to claim 11, characterized bythat the two connections (22.A7, 22.A8) of the hydraulic module (22) to be fluidically connected to the domestic water storage tank (5) are arranged and / or formed on the first side (22.S1), the second side (22.S2) and / or the third side (22.S3) of the hydraulic module (22). [13] Hydraulic module (22) according to one of claims 9 to 12, characterized by that one of the two connections (22.A1) to be fluidically connected to the primary heat source (2) is arranged on the section of the heat exchanger inflow line (L WT, zu ), wherein the other of the two connections (22.A2) to be fluidically connected to the primary heat source (2) is arranged on the section of the heat pump discharge line (L WP, ab ) is arranged and / or formed. [14] Hydraulic module (22) according to one of claims 9 to 13, characterized bythat one of the two connections (22.A3) to be fluidically connected to the heat pump (3) is arranged on the section of the heat pump discharge line (L WP, ab ), wherein the other of the two connections (22.A4) to be fluidically connected to the heat pump (3) is arranged and / or formed on the section of the heat pump inlet line (L WP, zu ) is arranged and / or formed. [15] Hydraulic module (22) according to one of claims 9 to 14, characterized by that one of the two connections (22.A5) to be fluidically connected to the water-air heat exchanger (4) is located on the section of the heat pump inlet line (L WP, zu) is arranged and / or formed, wherein the other of the two connections (22.A6) to be fluidically connected to the water-air heat exchanger (4) is arranged on the section of the heat exchanger inflow line (L WT, zu ) is arranged and / or formed. [16] Hydraulic module (22) according to one of claims 9 to 15, characterized by that one of the two connections (22.A7) to be fluidically connected to the domestic water storage tank (5) is located on the section of the domestic water discharge line (L BW, ab ), wherein the other of the two connections (22.A8) to be fluidically connected to the domestic water storage tank (5) is arranged on the section of the domestic water inflow line (L BW, zu ) is arranged and / or formed. [17] Hydraulic module (22) according to one of the preceding claims, characterized bythat by means of a branch of the 3-way connector (26.1) or a branch of the 3 / 2-way valve (21.1) and the branch flow circuit discharge line (L SK,ab ) and the branch of the 3 / 2-way valve (21.1) or the branch of the 3-way connector (26.1) and the branch flow circuit inlet line connected to this branch (L SK, zu ) a branch flow circuit (K AB ) of the pipe system (7) of the central heating system (1), wherein the heat transfer fluid (6) is pumped through the branch flow circuit (K AB ) and with the help of the branch flow circuit (K AB ) flowing heat transfer fluid (6), the domestic water (11) can be heated with the aid of the water-water heat exchanger (27). [18] Central heating system (1) with a hydraulic module (22) according to one of the preceding claims, with at least one primary heat source (2) operable with the aid of fuels, in particular a heating boiler and / or a gas boiler, with at least one electrically operable heat pump (3), with at least one water-air heat exchanger (4), preferably a heating element or a radiator for heating a building, with at least one domestic water storage tank (5), in particular a boiler, for the intermediate storage of domestic water (11) and with a piping system (7), wherein a heat transfer fluid (6), in particular water, can be heated with the aid of the primary heat source (2) and / or with the aid of the heat pump (3), wherein with the aid of the piping system (7) and with the aid of at least one pump (8, 9, 9b), in particular a heating pump (8) and / or a circulating pump (9) and / or a heat source pump (9b), the heat transfer fluid (6) is conveyed to the heat pump for heating thereof (3) and / or,in particular for its heating, can be conveyed by the primary heat source (2), wherein a heat exchanger inflow line (L, WT, zu ) of the pipe system (7) is fluidically connected and / or connected accordingly to the primary heat source (2) on the one hand and to the water-air heat exchanger (4) on the other hand, so that the heat transfer fluid (6) is supplied through the heat exchanger inlet line (L WT, zu ) can be fed to the water-air heat exchanger (4), wherein a heat pump inlet line (L WP, zu ) of the pipe system (7) is fluidically connected and / or connected accordingly to the water-air heat exchanger (4) on the one hand and to the heat pump (3) on the other hand, so that the heat transfer fluid (6) is supplied through the heat pump inlet pipe (L WP, zu ) of the heat pump (3), wherein a heat pump discharge line (L WP, ab) of the pipe system (7) is fluidically connected and / or connected accordingly to the heat pump (3) on the one hand and to the primary heat source (2) on the other hand, so that the heat transfer fluid (6) is discharged through the heat pump discharge pipe (L WP, ab ) can be fed to the primary heat source (2), characterized by that the hydraulic module (22) is used to completely form the heat exchanger inflow line (L WT, zu ), the heat pump inlet line (L WP, zu ), the heat pump drain line (L WP, ab ), the domestic water drain pipe (L BW, ab ) and the domestic water inlet pipe (L BW, zu ), in particular by means of the connections (22.A1 - 22.A8), is fluidically connected to the piping system (7) and / or is correspondingly connected to the piping system (7).

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