Heating circuit hydraulic module for a central heating system, branching flow circuit hydraulic module for a central heating system, universal housing for hydraulic modules which can be inserted into central heating systems, and corresponding central heating system

Abstract

The invention relates to a heating circuit hydraulic module (22.1) for a central heating system (1), a branching flow circuit hydraulic module (22.2) for a central heating system (1), a universal housing (23) for hydraulic modules (22.1, 22.2) which can be inserted into central heating systems (1), and a corresponding central heating system (1). The central heating system (1) has at least one primary heat source (2), at least one electrically operatable heat pump (3), at least one water-air heat exchanger (4), in particular at least one service water storage device (5), and a line system (7) with a heat exchanger supply line (LWT, zu), a heat pump supply line (LWP, zu), and a heat pump discharge line (LWP, ab). The production and / or assembly of the heating circuit hydraulic module (22.1), the branching flow circuit hydraulic module (22.2), the universal housing (23), and the central heating system (1) is simplified in that the heating circuit hydraulic module (22.1) has a heating circuit hydraulic module housing (22.1.G), wherein corresponding components are formed and / or arranged in and / or on the heating circuit hydraulic module housing (22.1.G), or the branching flow circuit hydraulic module (22.2) has a branching flow circuit hydraulic module housing (22.2.G), corresponding components are formed and / or arranged in and / or on the branching flow circuit hydraulic module housing (22.2.G), and / or at least two different configurations of lines, connecting pieces, and / or valves can be formed using the universal housing (23).

Description

[0001] Heating circuit hydraulic module for a central heating system, branch flow circuit hydraulic module for a central heating system, universal housing for hydraulic modules usable in central heating systems and associated central heating system

[0002] The invention relates to a heating circuit hydraulic module for a central heating system having the features of the preamble of patent claim 1, a branch flow circuit hydraulic module for a central heating system having the features of the preamble of patent claim 3, a universal housing for hydraulic modules usable in central heating systems having the features of the preamble of patent claim 6 and an associated central heating system having the features of the preamble of patent claim 22.

[0003] The central heating systems currently in use and / or already known or already present in buildings typically comprise at least one primary heat source operable with the aid of fuels, 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, in particular 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, 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 inflow line of the piping system is fluidly connectable, connected and / or appropriately connected 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 inflow line. A heat pump inflow line of the piping system is fluidly connectable, connected and / or appropriately connected 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 inflow line.A heat pump drain line of the piping system is fluidly connectable, connected, and / or appropriately connected to the heat pump on the one hand and to the primary heat source on the other, 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. It is also conceivable, however, 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.

[0004] 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 is 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 also be supplied with heated heat transfer fluid, in particular 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.The hydraulic module 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 on the heating boiler.

[0005] The hydraulic module 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 also makes retrofitting heat pumps in existing central heating systems particularly difficult, as a 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, since the heat pump is only designed to cover 30-50% of the heat demand, domestic water is heated by the boiler alone, using expensive fuels, even at an early stage, resulting in a sharp rise in fuel consumption throughout the year.

[0006] The invention is therefore based on the object of designing and / or developing a heating circuit hydraulic module for a central heating system, a branch flow circuit hydraulic module for a central heating system, a universal housing for hydraulic modules usable in central heating systems, and / or an associated central heating system in such a way that the problems of the prior art are minimized or at least reduced. In particular, the heating circuit hydraulic module, the branch flow circuit hydraulic module, the universal housing, and / or the associated central heating system should be as simple to manufacture and / or assemble as possible, or with the least possible effort.

[0007] This object underlying the invention is now initially achieved by a heating circuit hydraulic module for a central heating system having the features of patent claim 1.

[0008] One aspect of the invention is essentially that the heating circuit hydraulic module has a heating circuit hydraulic module housing, wherein a heating circuit 3-way connector, a heating circuit 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 and a bypass line are formed and / or arranged in and / or on the heating circuit hydraulic module housing, wherein 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, or wherein 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 in the heat pump inflow line,formed and / or interposed here, and wherein 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.

[0009] 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. By arranging the aforementioned components in the heating circuit hydraulic module housing, they are then correspondingly protected by the heating circuit hydraulic module housing and advantageously also insulated.Heat losses from the aforementioned components can thus be reduced by the heating circuit hydraulic module housing. The heating circuit hydraulic module greatly simplifies the installation and / or retrofitting or conversion of the associated central heating system. In particular, otherwise common installation errors can be avoided, as the specific shape and / or design of the heating circuit hydraulic module predetermines certain relative arrangements of the aforementioned lines, connectors, and / or valves. The heating circuit hydraulic module is advantageously pre-assembled, for example, in a factory or by a heating engineer, so that the installation time for an end customer who operates the central heating system after installation can be significantly reduced.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 heating circuit 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 heating circuit 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.Advantageously, two connections of the heating circuit hydraulic module, which are to be fluidically connected to the primary heat source, are arranged and / or formed on a first side of the heating circuit hydraulic module. Two connections of the heating circuit hydraulic module, which are to be fluidically connected to the heat pump, are arranged and / or formed on a second side of the heating circuit hydraulic module. Two connections of the heating circuit hydraulic module, which are to be fluidically connected to the water-air heat exchanger, are arranged and / or formed on a third side of the heating circuit hydraulic module.

[0010] The aligned connections enable simple, quick connection to the corresponding pipe sections or pipe system belonging to the central heating system. This also takes into account the fact that the pipes or pipe sections leading to and from the units, namely the water-to-air heat exchanger, the heat pump, or the primary heat source, are usually arranged side by side, particularly in the building with the central heating system. Furthermore, the risk of installation errors can be further reduced because the two connections that are to be fluidically connected to the respective units are spatially and thus visually separated from each other.

[0011] The object underlying the invention is also achieved by a branch flow circuit hydraulic module for a central heating system having the features of patent claim 3.

[0012] One aspect of the invention then essentially lies in the fact that the branch flow circuit hydraulic module has a branch flow circuit hydraulic module housing, wherein in and / or on the branch flow circuit hydraulic module housing a - first - 3-way connecting piece, a - first - 3 / 2-way valve, in sections the heat exchanger inflow line, in sections the heat pump outflow line, in sections a branch flow circuit inflow line and in sections a branch flow circuit outflow line are formed and / or arranged, wherein the 3-way connecting piece is arranged, formed and / or interposed in the heat exchanger inflow line, and wherein the 3 / 2-way valve is arranged, formed and / or interposed in the heat pump outflow line.

[0013] By arranging the aforementioned components in the branch flow circuit hydraulic module housing, they are then protected and insulated accordingly by the branch flow circuit hydraulic module housing. Heat losses from the aforementioned components can thus be reduced by the branch flow circuit hydraulic module housing. Using the branch flow circuit hydraulic module, the installation of the associated central heating system and / or retrofitting or conversion can be greatly simplified. In particular, the otherwise common installation errors can be avoided, since a specific shape and / or design of the branch flow circuit hydraulic module already predetermines certain arrangements of the aforementioned lines, connectors and / or valves relative to one another. The branch flow circuit hydraulic module is advantageously, for example,pre-assembled in a factory or by a heating engineer, so that the installation time for an end customer who operates the central heating system after installation can be significantly reduced.

[0014] Preferably, a branch flow circuit of the piping system can be formed by means of a branch of the 3-way connector and a branch flow circuit outlet line connected to this branch, and a branch of the 3 / 2-way valve and a 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. The domestic water can be heated by means of the heat transfer fluid flowing through the branch flow circuit.

[0015] With the help of the 3 / 2-way valve and the 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 3 / 2-way valve in the appropriate second valve position when the heating circuit hydraulic module is installed in the associated central heating system, the heat transfer fluid can be prevented from flowing through the branch flow circuit, thus preventing the domestic water from being heated.

[0016] According to a further embodiment of the branch flow circuit hydraulic module, two connections of the branch flow circuit hydraulic module, which are to be fluidically connected to the primary heat source, are arranged and / or formed on a first side of the branch flow circuit hydraulic module. One connection each of the branch flow circuit inflow line and the branch flow circuit outflow line of the branch flow circuit hydraulic module is arranged and / or formed on a second side of the branch flow circuit hydraulic module. Two connections of the branch flow circuit hydraulic module, which are to be fluidically connected to the heat pump and / or the water-air heat exchanger, in particular with the aid of the heating circuit hydraulic module, are arranged and / or formed on a third side of the branch flow circuit hydraulic module.

[0017] The connections aligned in this way enable simple, quick connection to the corresponding pipe sections of the central heating system. This also 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, in particular the heating circuit hydraulic module, or the primary heat source, are usually arranged side by side, particularly in the building with the central heating system. Furthermore, the risk of installation errors can be further reduced because the two connections that are to be fluidically connected to the respective units are spatially and thus also visually separated from each other.

[0018] The object underlying the invention is also achieved by a universal housing for hydraulic modules that can be used in central heating systems, having the features of patent claim 6.

[0019] One aspect of the invention then essentially lies in the fact that at least two different configurations of lines, connecting pieces, in particular 3-way connecting pieces, and / or valves, in particular 3 / 2-way valves, can be formed with the aid of the universal housing and the lines, connecting pieces and / or valves can be arranged accordingly in and / or on the universal housing, in particular wherein the heating circuit hydraulic module housing and the branch flow circuit hydraulic module housing are of identical construction.

[0020] The risk of assembly errors is particularly low because the specific shape and / or design of the universal housing predetermines only a limited number of the specific, different configurations of the pipes, connectors, and / or valves. Nevertheless, the universal housing can be manufactured particularly cost-effectively because it can be used in various configurations, particularly as a heating circuit hydraulic module housing and a branch flow circuit hydraulic module housing. If a central heating system is to incorporate both the heating circuit hydraulic module and the branch flow circuit hydraulic module, two identical universal housings can be used.

[0021] The universal housing advantageously has at least one recess structure with a plurality of recess areas for receiving lines, connectors and / or valves.

[0022] Each recessed area is adapted to the corresponding lines, connectors, and / or valves to be arranged there. The respective recessed area can be designed to accommodate only one component or to accommodate multiple components, in which case multiple components can be accommodated simultaneously through the recessed area. Such a universal housing with the recessed structure is particularly easy to manufacture, e.g., using an injection molding process or by removing material from a solid body. The recessed structure also allows the number of components required to form the universal housing to be drastically reduced.

[0023] Further preferably, the recess structure is at least partially formed as a negative form of the lines, connecting pieces and / or valves that can be arranged in the recess structure.

[0024] This allows the lines, connectors, and / or valves to be particularly well supported and / or arranged within the universal housing. Furthermore, the risk of assembly errors is further reduced, as incorrect arrangements of the lines, connectors, and / or valves are essentially impossible. Furthermore, the assembly of the lines, connectors, and / or valves is simplified, as the negative shape of the corresponding lines, connectors, and / or valves makes it visually clear which of the lines, connectors, and / or valves to be arranged on the universal housing belong where.

[0025] According to an advantageous embodiment of the universal housing, the universal housing comprises a base body and a cover. When the universal housing is assembled, the recess structure is completely formed, partly by the base body and partly by the cover.

[0026] This allows for easy assembly of the lines, connectors, and / or valves to be arranged on the universal housing when the base body and cover are open, either on the base body or on the cover. Assembly of the hydraulic module belonging to the universal housing can then be completed simply by placing the base body and cover on top of each other. By dividing the recess structure between the base body and the cover, the manufacture of the recess structure is simplified, as essentially no undercuts of the recess structure are required in the base body or the cover. The necessary undercuts of the recess structure in the universal housing can then be created by placing the base body and the cover on top of each other.If the base body and the lid are to be manufactured using an injection molding process, the necessary extraction slopes can also be easily realized due to the division of the recess structure between the base body and the lid.

[0027] Advantageously, the recess structure has a total of several, in particular six, connection openings to the surroundings of the universal housing. The connections of a hydraulic module comprising the universal housing can be arranged and / or formed in and / or adjacent to the connection openings.

[0028] These connections allow the hydraulic module to be easily and quickly integrated into the associated central heating system or installed accordingly. Such connections can be implemented using screw connections, for example.

[0029] According to a further embodiment of the universal housing, two connection openings are located in a connection opening plane. The connection opening plane is aligned perpendicular to a separation plane formed by the contact between the base body and the cover when the universal housing is assembled.

[0030] The axes of the connection openings are preferably aligned parallel to the parting plane or lie within this parting plane. This allows all cables to be connected to the connections to be arranged parallel to the parting plane. Both the universal housing and the cables to be connected to the connections can thus be advantageously arranged on or at a short distance from a building wall.

[0031] According to a further preferred embodiment of the universal housing, the recess structure has a valve opening to the surroundings of the universal housing. A valve of the hydraulic module having the universal housing can be arranged at least partially within the valve opening and / or penetrating this valve opening, in particular with the axis of the valve opening oriented substantially perpendicular to the parting plane.

[0032] This makes the valve accessible from outside the universal housing, and the valve position can also be visually determined if the valve is designed accordingly. Typically, the valve is controlled by a control and / or regulating device. However, it is also conceivable for the valve to be manually operated from outside, through the valve opening, which is advantageous in the event of problems with the control and / or regulating device and / or its connection to the valve.

[0033] According to a further, particularly preferred embodiment of the universal housing, the valve opening is formed in the cover.

[0034] Typically, the universal housing is mounted with its base body to a building wall, with the cover positioned on the side of the base body facing away from the building wall. The valve opening in the cover improves the visibility of the valve from the outside. Furthermore, mounting the cover to the base body with the valve already positioned on the base body is simplified, as the cover with its valve opening can be slipped over the valve until contact between the cover and the base body is established at the parting line.

[0035] Further preferably, the recess structure has at least one node region in which a connecting piece, a valve and / or two fluidically separated lines can be arranged.

[0036] The node area represents a special design of a recessed area, which is adjoined by at least three additional recessed areas. The node area could therefore also be referred to as an intersection area.

[0037] Several special node areas are described in detail below. These special designs are particularly important for the universal housing to be used both as a heating circuit hydraulic module housing and as a branch flow circuit hydraulic module housing. Advantageously, a 3-way connector, in particular the heating circuit 3-way connector or the first 3-way connector, can be arranged in a first node area.

[0038] Three lines or line sections can then be connected to the 3-way connector, each of which can be arranged in a recess area adjacent to the first node area.

[0039] Particularly preferably, a 3 / 2-way valve, in particular the heating circuit 3 / 2-way valve or the first 3 / 2-way valve, can be arranged in a second node region.

[0040] Three lines or line sections can then also be connected to the 3 / 2-way valve, each of which can be arranged in a recess area adjoining the second node area.

[0041] According to a further advantageous embodiment of the universal housing, a preferably curved section of the bypass line and a preferably curved section of the heat pump discharge line, which is fluidically separated from the section of the bypass line, can be arranged in a third node region.

[0042] According to a further alternative embodiment of the universal housing, a preferably curved section of the branch flow circuit discharge line and a

[0043] - fluidically separated from the section of the branch flow circuit discharge line

[0044] - preferably a curved section of the heat pump discharge line can be arranged in the third node area.

[0045] Four further recessed areas adjoin the third node area, in which sections of the bypass line, the heat pump drain line, and / or the branch flow circuit drain line can be arranged. One could also say that the bypass line, the heat pump drain line, and / or the branch flow circuit drain line can each be arranged penetrating the third node area.

[0046] A preferably straight section of the bypass line can advantageously be arranged in a fourth node region. On the other hand, a preferably curved section of the branch flow circuit discharge line and a preferably curved section of the heat pump discharge line—fluidically separated from the section of the branch flow circuit discharge line—can also preferably be arranged in the fourth node region.

[0047] This shows that a component, such as a line section, does not have to be arranged in all recess areas adjoining a node area. It is also conceivable, in particular, that certain recess areas remain free to form a specific one of the different configurations of lines, connectors, and / or valves. As described above, in the fourth node area, either only the straight section of the bypass line or the section of the branch flow circuit drain line and the section of the heat pump drain line can be arranged. Therefore, if the straight section of the bypass line is arranged in the fourth node area, a recess area adjoining the fourth node area remains free.

[0048] Further preferably, the recess structure has at least one parallel region in which two fluidically separated lines can be arranged at least partially next to one another, one above the other, and / or partially outside the parting plane, in particular partially extending between the parting plane and an outer side of the cover or an outer side of the base body. In particular, the parallel region is formed between the third and fourth node regions.

[0049] This increases flexibility in designing different configurations of lines, connectors, and / or valves. Lines can thus partially "cross" without the fluids conveyed within them mixing with each other.

[0050] The object underlying the invention is also achieved by a central heating system with a previously described heating circuit hydraulic module and / or with a previously described branch flow circuit hydraulic module and / or with at least one previously described universal housing, precisely with the features of patent claim 22.

[0051] One aspect of the invention then essentially lies in the fact that a heating circuit 3-way connector is arranged, formed and / or interposed in the heat exchanger inflow line and a heating circuit 3 / 2-way valve is arranged, formed and / or interposed in the heat pump inflow line. Alternatively, 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. The heating circuit 3-way connector is fluidically connected to the heating circuit 3 / 2-way valve via the bypass line and / or connected accordingly. A first 3-way connector is arranged, formed and / or interposed in the heat exchanger inflow line.A - first - 3 / 2-way valve is arranged, formed and / or interposed in the heat pump discharge line.

[0052] In this way, the overall assembly effort for setting up the central heating system is minimized. 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.

[0053] Preferably, a branch flow circuit of the piping system can be formed by means of a branch of the 3-way connector and a branch flow circuit outlet line connected to this branch, and a branch of the 3 / 2-way valve and a 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. The domestic water can be heated by means of the heat transfer fluid flowing through the branch flow circuit.

[0054] This creates a structurally simple solution for heating domestic water, which is also easy to control and regulate, as only the 3 / 2-way valve needs to be activated accordingly. This branch flow circuit design is particularly useful when the heat pump is or will be retrofitted to an existing system. Such a branch flow circuit can be connected or integrated into an existing system without any major effort. The lines described here can be easily and cost-effectively constructed using pipes and / or hoses and / or flow channels formed in housings such as the heating circuit hydraulic module housing, the flow circuit hydraulic module housing, and / or the universal housing.With regard to the term “domestic water storage tank,” it should be briefly pointed out that this refers in particular to a water storage tank in which the water is heated. The “domestic water storage tank” can therefore also be referred to as a “hot water storage tank.” The heated water can be drawn from the domestic water storage tank, for example, for showering at home, or for cooking or dishwashing at home, with new fresh water then being added to the domestic water storage tank to refill it. The designation “domestic water storage tank” therefore does not mean that previously used and / or contaminated water is stored in this tank, but rather that the water stored and / or saved therein is used for subsequent “use,” for example, for showering. In particular, drinking water is therefore stored, saved, and heated in the domestic water storage tank. This should be noted.

[0055] Further preferably, a heating line is arranged and / or formed within the domestic hot water storage tank, within a wall of the domestic hot water storage tank, and / or externally on the wall of the domestic hot water storage tank, so that when the heat transfer fluid flows through the heating line, the domestic hot water then present in the domestic hot water storage tank can be heated with the aid of the heat transfer fluid. A primary heat source drain line of the piping system is fluidly connected and / or connected accordingly to the primary heat source on the one hand and to the heating line on the other, so that the heat transfer fluid can be supplied to the heating line through the primary heat source drain line.A primary heat source inflow line of the piping system is fluidly connected to the heating line 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 primary heat source inflow line. The heat exchanger inflow line is fluidly connected to the primary heat source outflow line and / or connected to the primary heat source outflow line. The heat pump outflow line is fluidly connected to the primary heat source inflow line and / or connected to the primary heat source inflow line, in particular by means of a primary heat source 3 / 2-way valve.

[0056] In this way, the overall effort required to set up the piping system is minimized, as the necessary pipe connections to one another or to valves are kept to a minimum. Advantageously, the branch flow circuit inflow line of the branch flow circuit is fluidically connected to the primary heat source outflow line via the first 3 / 2-way valve and a second 3-way connector arranged in and / or interposed with the primary heat source outflow line and / or connected to the primary heat source outflow line. The branch flow circuit outflow line of the branch flow circuit is fluidically connected to the primary heat source inflow line via the first 3-way connector and a third 3-way connector and / or connected to the primary heat source inflow line.

[0057] This further simplifies the subsequent integration of a heat pump into an existing central heating system. To create the aforementioned connections between the branch flow circuit drain line and the branch flow circuit supply line with the primary heat source drain line and the primary heat source supply line, only the second and third 3-way connectors need to be inserted into the primary heat source drain line and the primary heat source supply line and fluidically connected to the branch flow circuit drain line and the branch flow circuit supply line, respectively. This can be achieved with minimal manual effort.

[0058] According to an advantageous embodiment of the central heating system, the primary heat source comprises a primary heat source housing, and the domestic hot water storage tank comprises a domestic hot water storage tank housing arranged at a distance from the primary heat source housing. The second and third three-way connecting pieces are then arranged, in particular, between the primary heat source housing and the domestic hot water storage tank housing.

[0059] In this case, when the primary heat source housing and the domestic hot water storage housing are arranged at a distance from each other, the primary heat source drain line and the primary heat source inlet line are at least partially accessible from the outside. This makes the installation of the 3-way connectors described above particularly easy, as no modifications to the primary heat source housing or the domestic hot water storage housing are required.

[0060] According to a further preferred embodiment of the central heating system, a water-water heat exchanger, in particular a plate heat exchanger, is provided, in particular embodied as a separate component. The branch flow circuit inflow line of the branch flow circuit 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 via the branch flow circuit inflow line. The branch flow circuit outflow line of the branch flow circuit is fluidly connected to and / or connected to the first side, so that the heat transfer fluid can be discharged from the first side via the branch flow circuit outflow line.A domestic water outlet line is fluidically connected and / or connected to the domestic water storage tank on the one hand and to a second side of the water-to-water heat exchanger on the other, so that the domestic water can be supplied from the domestic water storage tank to the second side via the domestic water outlet line, in particular with the aid of a domestic water pump. A domestic water inlet line is fluidically connected and / or connected to the domestic water storage tank on the one hand and to the second side on the other, so that the domestic water can be supplied from the second side of the water-to-water heat exchanger to the domestic water storage tank via the domestic water inlet line.

[0061] The energy provided by the heat pump can be transferred to the domestic hot water via the water-to-water heat exchanger. The water-to-water heat exchanger can then be optimized to match the flow rates of the heat transfer fluid through the heat pump and through the first side of the water-to-water heat exchanger to ensure the best possible heat transfer to the domestic hot water.

[0062] According to a further, particularly preferred embodiment of the central heating system, a hot water pipe is fluidically connected to the domestic water discharge pipe and / or connected to the domestic water discharge pipe, wherein a cold water pipe is fluidically connected to the domestic water inflow pipe and / or connected to the domestic water inflow pipe.

[0063] Heated domestic water can be drawn from the hot water tank via the hot water pipe for subsequent use, such as showering. However, if the heated domestic water is not at the desired temperature, the domestic water that is still too cold is fed to the second side of the water-to-water heat exchanger, where it is heated using the energy provided by the heat pump. The domestic water heated in the second side of the water-to-water heat exchanger can then be fed back into the domestic water tank, possibly with the addition of fresh, cold domestic water supplied via the cold water pipe.

[0064] Preferably, the primary heat source and the domestic hot water storage tank have a common integral housing. The primary heat source outflow line and the primary heat source inflow line are arranged, in particular in their entirety, within the integral housing.

[0065] The above-described variant of the central heating system with the separate water-to-water heat exchanger is particularly suitable when the primary heat source and the domestic hot water storage tank share a common integral housing, and a subsequent connection of the heat pump between the primary heat source and the domestic hot water storage tank is not possible or only possible with disproportionate effort, i.e., modifications to such an integral housing. In other words, retrofitting a heat pump to a central heating system is possible even when the primary heat source and the domestic hot water storage tank share a common integral housing.

[0066] Further preferably, the heating pump is assigned to the water-air heat exchanger, the circulation pump to the heat pump and the heat source pump to the primary heat source, namely arranged in a fluidically arranged area of ​​the pipe system assigned to the respective unit or in a partial pipe area having the respective unit.

[0067] Thus, the heat pump can be used to adjust the mass flow of heat transfer fluid conveyed through the water-to-air heat exchanger, the circulation pump can be used to adjust the mass flow of heat transfer fluid conveyed through the heat pump, and the heat source pump can be used to adjust the mass flow of heat transfer fluid conveyed through the primary heat source. However, the heat pump and the heat source pump, in particular, are optional, since, with the appropriate switching of the valves described above, the flow through the water-to-air heat exchanger and / or the primary heat source can also be generated, for example, solely by the circulation pump.

[0068] According to a particularly advantageous embodiment of the central heating system, a temperature sensor is arranged in a – vertically viewed – lower area of ​​the domestic hot water tank or adjacent to this – vertically viewed – lower area of ​​the domestic hot water tank for determining the actual domestic hot water temperature. The temperature sensor is connected to a heat pump control and / or regulating device for control, signal, and / or data purposes. The heat pump is connected to the heat pump control and / or regulating device for control purposes. The heat pump control and / or regulating device is designed and / or constructed such that the heat pump can be controlled and / or regulated depending on the determined actual domestic hot water temperature, which will be explained in more detail below.In particular, a central heating control and / or regulation device is connected to the primary heat source for the purpose of controlling and / or regulating it.

[0069] In this way, the temperature of the domestic water can be controlled and / or regulated particularly well using the heat pump and the heat pump control and / or regulation device. By arranging the temperature sensor in the - vertically viewed - lower area of ​​the domestic water storage tank, the heat pump can initially be controlled and / or regulated particularly quickly, in particular without a significant time delay, especially when fresh and therefore cold or colder domestic water is fed back into the domestic water storage tank due to domestic water being drawn from the domestic water storage tank (e.g., for a domestic shower) by filling the domestic water storage tank with fresh domestic water. The supplied - fresh - domestic water flows around the temperature sensor before it mixes with the rest of the domestic water still present in the domestic water storage tank, some of which has already been heated.The lower area of ​​the domestic hot water tank, viewed vertically, is preferably formed in a lower half, in particular a lower third, in particular a lower quarter, of the total height of the domestic hot water tank, viewed vertically. The first temperature sensor is then provided or arranged in particular in this aforementioned or defined lower area of ​​the domestic hot water tank.

[0070] There are now numerous possibilities for advantageously designing and developing the heating circuit hydraulic module according to the invention for a central heating system, the branch flow circuit hydraulic module according to the invention for a central heating system, the universal housing according to the invention for hydraulic modules usable in central heating systems, and the associated central heating system according to the invention. Reference may be made in this regard to the claims subordinate to patent claims 1, 3, 6, and 22, respectively.In the following, a preferred embodiment of the heating circuit hydraulic module according to the invention for a central heating system, the branch flow circuit hydraulic module according to the invention for a central heating system, the universal housing according to the invention for hydraulic modules usable in central heating systems, and the associated central heating system according to the invention will be explained and described in more detail with reference to the drawing and the accompanying description. The drawing shows:

[0071] Fig.1a shows a schematic representation of a heating circuit hydraulic module or a branch flow circuit hydraulic module with an associated universal housing in a view of a respective front side,

[0072] Fig.1b shows a schematic representation of the heating circuit hydraulic module or the branch flow circuit hydraulic module with the associated universal housing from Fig.1a in a three-dimensional view essentially of a respective rear side,

[0073] Fig.2a shows a schematic representation of the formed heating circuit hydraulic module with a base body but without a cover of the associated universal housing in a view of a parting plane formed in the assembled state of the universal housing between the base body and the cover by their contact,

[0074] Fig.2b shows a schematic representation of the heating circuit hydraulic module according to the representation in Fig.2a but in contrast to Fig.2a in a slightly three-dimensional view,

[0075] Fig.ßa shows a schematic representation of the formed branch flow circuit hydraulic module with a base body but without a cover of the associated universal housing in a view of the parting plane,

[0076] Fig.ßb shows a schematic representation of the branch flow circuit hydraulic module according to the representation in Fig.ßa but in contrast to Fig.ßa in a slightly three-dimensional view,

[0077] Fig.4a shows a schematic representation of the universal housing in a view of a front side,

[0078] Fig.4b shows a schematic representation of the universal housing from Fig.1a in a three-dimensional view essentially on a rear side,

[0079] Fig.4c shows a schematic representation of the universal housing from Fig.1 a in a slightly three-dimensional view, Fig.5a shows a schematic representation of only the basic body of the universal housing without the components arranged here in a view of the parting plane,

[0080] Fig.5b in schematic representation only the cover of the universal housing without components arranged here in a view of the parting plane,

[0081] Fig.6a shows a schematic representation of the base body of the universal housing from Fig. 5a in a three-dimensional view essentially on the parting plane,

[0082] Fig.6b shows a schematic representation of the cover of the universal housing from Fig. 5b in a three-dimensional view essentially on the parting plane,

[0083] Fig.7a shows a schematic representation of a hydraulic circuit diagram of a first embodiment of the central heating system with the heating circuit hydraulic module and with the branch flow circuit hydraulic module, each of which is shown with the base body and components arranged there, but without the cover of the associated universal housing, and

[0084] Fig.7b shows a schematic representation of a hydraulic circuit diagram of a second embodiment of the central heating system with the heating circuit hydraulic module and with the branch flow circuit hydraulic module, which are each shown with the base body and components arranged there, but without the cover of the associated universal housing.

[0085] Fig.1a, Fig.1b, Fig.2a and Fig.2b each show a heating circuit hydraulic module 22.1 for a central heating system 1.

[0086] The respective central heating system 1, the respective hydraulic circuit diagram of which is shown in Fig. 7a and Fig. 7b, 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-to-air heat exchanger 4, preferably a heating element or a radiator for heating a building, in particular at least one domestic hot water storage tank 5, in particular a boiler, for temporarily storing domestic hot water 11, and a piping system 7. It is theoretically conceivable that the heating circuit hydraulic module could also be used in a central heating system without a domestic hot water storage tank. The water-to-air heat exchanger 4 could also be designed by means of or as an underfloor heating system. The heating boiler is designed in particular as an oil-fired boiler operable with oil or as a gas-fired boiler operable with gas (for example as a "gas boiler").

[0087] 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 inlet line LWT, ZU of the piping system 7 is fluidically connected, on the one hand, to the primary heat source 2 and, on the other hand, to the water-air heat exchanger 4, in particular with the aid of the heating circuit hydraulic module 22.1, connected and / or connected accordingly, so that the heat transfer fluid 6 is supplied through the heat exchanger inlet line LWT, ZU can be fed to the water-air heat exchanger 4. A heat pump inlet line L W p, zuof the pipe system 7 is fluidically connectable, connected and / or connected accordingly, on the one hand, to the water-air heat exchanger 4 and on the other hand to the heat pump 3, in particular with the aid of the heating circuit hydraulic module 22.1, so that the heat transfer fluid 6 is supplied through the heat pump inlet line L W p, zu can be fed to the heat pump 3. A heat pump drain line L W p, ab of the pipe system 7 is fluidically connectable, connected and / or connected accordingly, on the one hand, to the heat pump 3 and on the other hand to the primary heat source 2, in particular with the aid of the heating circuit hydraulic module 22.1, so that the heat transfer fluid 6 is discharged through the heat pump discharge line L W p, can be supplied from the primary heat source 2.

[0088] The heating circuit hydraulic module 22.1 can already be provided during the design of such a central heating system 1. Furthermore, it is also conceivable for the heating circuit hydraulic module 22.1 to be retrofitted to an existing central heating system 1. Then, with the help of the heating circuit hydraulic module 22.1, the heat pump 3, which is preferably also retrofitted, can be fluidically connected to the central heating system 1 without great effort. The heating circuit hydraulic module 22.1 and the heat pump 3 are then preferably part of a so-called retrofit kit. The heating circuit hydraulic module 22.1 has a heating circuit hydraulic module housing 22.1.G. In and / or on the heating circuit hydraulic module housing 22.1.G, as shown in Fig.2a, Fig.2b, Fig.7a and Fig.7b, a heating circuit 3-way connector 26.H, a heating circuit 3 / 2-way valve 21.H, and, in sections, the heat exchanger inflow line L W T, ZU, sectionally the heat pump inlet line L W p, to, in sections the heat pump drain line L W p, ab and a bypass line L By designed and / or arranged. The heating circuit 3-way connector 26.H is in the heat exchanger inlet line L W T, ZU arranged, formed and / or interposed here and the heating circuit 3 / 2-way valve 21. H is in the heat pump inlet line L W p, zu arranged, formed and / or interposed therein. Alternatively, it would also be conceivable for the heating circuit 3 / 2-way valve to be arranged, formed and / or interposed therein in the heat exchanger inflow line and for the heating circuit 3-way connector to be arranged, formed and / or interposed therein in the heat pump inflow line. The heating circuit 3-way connector 26.H is, as can be seen in particular from Figs. 2a and 2b, connected via the bypass line L Byfluidically connected to the heating circuit 3 / 2-way valve 21. H and / or connected accordingly.

[0089] A 3-way connector is used to fluidically connect three lines and thus has three connections, which can also be referred to as branches. 3-way connectors can be T-shaped or Y-shaped. 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. Using a 3 / 2-way valve, two different flow paths can be created through the 3 / 2-way valve. A 3 / 2-way valve can be switched between two switching positions. The lines or line sections described here can be easily and cost-effectively constructed using pipes and / or hoses and / or flow channels formed in the heating circuit hydraulic module housing 22.1.G.The valves and connecting pieces described can therefore also be formed at least partially using the heating circuit hydraulic module housing 22.1.G.

[0090] Two connections 22.1.A1, 22.1.A2 of the heating circuit hydraulic module 22.1, which are to be fluidically connected to the primary heat source 2, are arranged and / or formed on a first side 22.1.S1 of the heating circuit hydraulic module 22.1. Two connections 22.1.A3, 22.1.A4 of the heating circuit hydraulic module 22.1, which are to be fluidically connected to the heat pump 3, are arranged and / or formed on a second side 22.1.S2 of the heating circuit hydraulic module 22.1. Two connections 22.1.A5, 22.1.A6 of the heating circuit hydraulic module 22.1, which are to be fluidically connected to the water-air heat exchanger 4, are arranged and / or formed on a third side 22.1.S3 of the heating circuit hydraulic module 22.1.

[0091] The heating circuit hydraulic module 22.1 is preferably arranged with its rear side against a wall of a building. A front side of the heating circuit hydraulic module 22.1 is then formed essentially parallel to the wall. The first side 22.1.S1 then forms a bottom side of the heating circuit hydraulic module 22.1. The second side 22.1.S2 then forms a right-hand longitudinal side of the heating circuit hydraulic module 22.1, viewed from the front. The third side 22.1.S3 then forms a top side of the heating circuit hydraulic module 22.1.

[0092] Fig.1a, Fig.1b, Fig.3a and Fig.3b each show a branch flow circuit hydraulic module 22.2 for a central heating system 1. Fig.1a, Fig.1b represent the heating circuit hydraulic module 22.1 and the branch flow circuit hydraulic module 22.2, which do not differ from each other when viewed from the outside. The respective central heating system 1, the respective hydraulic circuit diagram of which is shown in Fig.7a and Fig.7ab, also has, for accommodating the branch flow circuit hydraulic module 22.2, at least one primary heat source 2 which can be operated with the aid of fuels, in particular a boiler and / or a gas boiler, at least one electrically operated 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 the intermediate storage of domestic water 11 and a piping system 7.In contrast to the use of the heating circuit hydraulic module 22.1, the use of the branch flow circuit hydraulic module 22.2 is only useful in combination with the domestic hot water storage tank 5.

[0093] The branch flow circuit hydraulic module 22.2 can also be included in the design of such a central heating system 1. Furthermore, it is also conceivable for the branch flow circuit hydraulic module 22.2 to be retrofitted to an existing central heating system 1. Then, with the help of the branch flow circuit hydraulic module 22.2, the heat pump 3, which is preferably also retrofitted, can be fluidically connected to the central heating system 1. The branch flow circuit hydraulic module 22.2 is then preferably also part of the aforementioned retrofit kit.

[0094] The branch flow circuit hydraulic module 22.2 has a branch flow circuit hydraulic module housing 22.2.G. In and / or on the branch flow circuit hydraulic module housing 22.2.G, as shown in Fig.3a, Fig.3b, Fig.7a and Fig.7b, a first 3-way connector 26.1, a first 3 / 2-way valve 21.1, in sections the heat exchanger inflow line LWT, ZU, in sections the heat pump outflow line L W p, at>, in sections a branch flow circuit inflow line LSK, zu and in sections a branch flow circuit discharge line LSK, formed and / or arranged. The 3-way connector 26.1 is in the heat exchanger inlet line L W T, ZU arranged, designed and / or interposed here. The 3 / 2-way valve 21.1 is in the heat pump drain line L W p, ab arranged, formed and / or interposed here.

[0095] The lines or line sections described here can be easily and cost-effectively formed using pipes and / or hoses and / or flow channels formed in the branch flow circuit hydraulic module housing 22.2.G. The described valves and connectors can therefore also be formed, at least in part, using the branch flow circuit hydraulic module housing 22.2.G.

[0096] By means of a branch of the 3-way connector 26.1 and a branch flow circuit outlet line LSK connected to this branch and a branch of the 3 / 2-way valve 21.1 and a branch flow circuit inlet line LSK connected to this branch, ZUA branch flow circuit KAB of the piping system 7 can be formed. The heat transfer fluid 6 can be conveyed through the branch flow circuit KAB with the aid of at least one pump 8, 9, 9b, and the domestic water 11 can be heated with the aid of the heat transfer fluid 6 flowing through the branch flow circuit KAB.

[0097] 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.

[0098] Two connections 22.2.A1, 22.2.A2 of the branch flow circuit hydraulic module 22.2, which are to be fluidically connected to the primary heat source 2, are arranged and / or formed on a first side 22.2.S1 of the branch flow circuit hydraulic module 22.2. One connection 22.2.A4, 22.2.A3 of the branch flow circuit inlet line LSK, ZU or the branch flow circuit drain line LSK, from the branch flow circuit hydraulic module 22.2, is arranged and / or formed on a second side 22.2.S2 of the branch flow circuit hydraulic module 22.2. Two connections 22.2.A5, 22.2.A6 of the branch flow circuit hydraulic module 22.2, which are to be fluidically connected to the heat pump 3 and / or the water-air heat exchanger 4, in particular with the aid of the heating circuit hydraulic module 22.1, are arranged and / or formed on a third side 22.2.S3 of the branch flow circuit hydraulic module 22.2.

[0099] The branch flow circuit hydraulic module 22.2 is also preferably arranged with its rear side against a wall of a building. A front side of the branch flow circuit hydraulic module 22.2 is then formed essentially parallel to the wall. The first side 22.2.S1 then forms a bottom side of the branch flow circuit hydraulic module 22.2. The second side 22.2.S2 then forms a right-hand longitudinal side of the branch flow circuit hydraulic module 22.2, viewed from the front. The third side 22.2.S3 then forms a top side of the branch flow circuit hydraulic module 22.2.

[0100] Figs. 1 to 7b each also show at least parts of a universal housing 23 for hydraulic modules 22.1, 22.2 usable in central heating systems 1. Figs. 4a to 4b show the universal housing 23 separately and in a closed state. Figs. 5a and 5b each show a part of one and the same universal housing 23 in an unfolded state. Likewise, Figs. 6a and 6b each show a part of one and the same universal housing 23 in an unfolded state.

[0101] At least two different configurations of lines LWT. ZU, LWP, ZU , LWP, from, L By , LSK, ZU , LSK, ab, connecting pieces, in particular 3-way connecting pieces 26.H, 26.1 , and / or valves, in particular 3 / 2-way valves 21.H, 21.1 , can be formed using the universal housing 23. The lines L W T, ZU , LWP, ZU , LWP, from, L By , LSK, ZU, LSK, ab, connecting pieces 26.H, 26.1 and / or valves 21.H, 21.1 can be arranged accordingly in and / or on the universal housing 23, in particular wherein the heating circuit hydraulic module housing 22.1.G and the branch flow circuit hydraulic module housing 22.2.G are of identical construction, which is particularly evident from Fig.1a and Fig. 1b.

[0102] Such a configuration is shown in Fig. 2a and Fig. 2b, respectively, and in Fig. 3a and Fig. 3b, respectively. The heating circuit hydraulic module 22.1 is formed by the configuration shown in Fig. 2a and Fig. 2b. The branch flow circuit hydraulic module 22.2 is formed by the configuration shown in Fig. 3a and Fig. 5b. The universal housing 23 has at least one recess structure 24 with several recess areas 24. K1 - 24. K4, 24. P for accommodating lines LWT, ZU , LWP, ZU , LWP, from, L By, LSK, ZU, LSK, ab, connecting pieces 26. H, 26.1 and / or valves 21. H, 21.1, which in particular from Fig.5a to Fig.6b without such lines L W T, ZU , L W P, ZU , LWP, from, L By , LSK, to, LSK, off, connecting pieces 26.H, 26.1 and / or valves 21.H, 21.1 can be seen. The recess structure 24 is thus designed as a cavity in the assembled universal housing 23. The various recess areas 24.K1 - 24.K4, 24.P of the recess structure 24 merge into one another. Here, a continuous recess structure 24 / a continuous cavity is shown. However, the formation of partially separated cavities and thus two or more recess structures would also be conceivable.

[0103] The recess structure 24 is at least partially designed as a negative form of the lines LWT, ZU, LWP, ZU, LWP, ab, L that can be arranged in the recess structure 24. By, LSK, ZU, LSK, ab, connecting pieces 26. H, 26.1 and / or valves 21. H, 21.1. For example, a recess area for accommodating a cylindrical pipe is also cylindrical. The lines L W T, ZU , LWP, TO, LWP, from, L By , LSK, to, LSK, from, connecting pieces 26.H, 26.1 and / or valves 21. H, 21.1 can thus be supported over a large area and / or across the entire circumference with the help of the universal housing 23.

[0104] The universal housing 23 has a base body 23.1 and a cover 23.2. The recess structure 24 is completely formed in the assembled state of the universal housing 23, partly by means of the base body 23.1 and partly by means of the cover 23.2. The aforementioned negative mold is then formed, in particular, partly in the base body 23.1 and partly in the cover 23.2. Figures 2a, 2b, 3a, 3b, 5a, 5b, 6a, 6b, 7a and 7b each show only the base body 23.1 or the cover 23.2 of the universal housing 23, so that the respective part of the recess structure 24 or the lines L arranged therein W T, ZU , LWP, ZU , LWP, from, L By , LSK, ZU, LSK, ab, connecting pieces 26.H, 26.1 and / or valves 21.H, 21.1 can be seen. The universal housing 23 comprises, in particular, a foamed plastic such as Styrofoam. The base body 23.1 and the cover 23.2 are preferably constructed as one piece, e.g., using the aforementioned foamed plastic, in particular Styrofoam.

[0105] The recess structure 24 has a total of several, in particular six, connection openings 24.A1 - 24.A6 to the surroundings of the universal housing 23. Connections 22.1.A1 - 22.1.A6 or 22.2.A1 - 22.2.A6 of a hydraulic module 22.1, 22.2 having the universal housing 23 can be arranged and / or formed in and / or adjacent to the connection openings 24.A1 - 24.A6. Conventional screw connections with union nuts, for example, can be used as connections 22.1.A1 - 22.1.A6 or 22.2.A1 - 22.2.A6, with such union nuts then being arranged outside the universal housing 23. Such union nuts then enclose lines or line sections protruding from the universal housing 23 and penetrating the connection openings 24.A1 - 24.A6. However, the connections 22.1.A1 - 22.1.A6 or 22.2.A1 - 22.2.A6 can also be designed differently.

[0106] Two connection openings 24.A1 - 24.A6 are located in each connection opening plane. The connection opening plane is aligned perpendicular to a separation plane 23.T formed by the contact between the base body 23.1 and the cover 23.2 when the universal housing 23 is assembled. If the universal housing 23 is arranged against a wall, the separation plane 23.T is preferably aligned essentially parallel to this wall. The axes of the cables or cable sections penetrating the connection openings 24.A1 - 24.A6 then also run parallel to such a wall in the area of ​​the universal housing 23 and thus require only a small amount of installation space in the adjacent room.

[0107] The recess structure 24 has a valve opening 24.V to the environment of the universal housing 23. A valve 21.H, 21.1 of the hydraulic module 22.1, 22.2 having the universal housing 23 can be arranged at least partially within the valve opening 24.V and / or penetrating this valve opening 24.V. In particular, the axis of the valve opening 24.V is aligned substantially perpendicular to the parting plane 23.T. The valve opening 24.V is formed in the cover 23.2.

[0108] The recess structure 24 has at least one node region 24. K1 - 24. K4, in which a connecting piece 26. H, 26.1, a valve 21. H, 21.1 and / or two fluidically separated lines L By , L W p, ab, LSK, ZUcan be arranged. The node areas 24.K1 - 24.K4 are formed partly in the base body 23.1 and partly in the cover 23.2, so that in the assembled state of the universal housing 23, the node areas 24.K1 - 24.K4 are fully formed.

[0109] In particular, the recess structure 24 has the four node regions 24.K1 - 24.K4 shown in Figures 5a, 5b, 6a, and 6b, which are described below. However, it would also be conceivable to provide fewer or more than four node regions, depending on the desired configurations of the components to be arranged in and / or on the universal housing 23, such as the lines, valves, and / or connectors.

[0110] A 3-way connector, in particular the heating circuit 3-way connector 26.H (see, for example, Fig.2a and 2b) or the first 3-way connector 26.1 (see, for example, Fig.3a and 3b), can be arranged in a first node area 24.K1.

[0111] A 3 / 2-way valve, in particular the heating circuit 3 / 2-way valve 21.H (see e.g. Fig.2a and 2b) or the first 3 / 2-way valve 21.1 (see e.g. Fig.3a and 3b), can be arranged in a second node area 24.K2.

[0112] According to Fig.2a and 2b, a preferably curved section of the bypass line L By and a - flow-wise to the section of the bypass line L By separate - preferably curved section of the heat pump drain line LWP, can be arranged in a third node area 24. K3.

[0113] According to Fig.3a and 3b, a preferably curved section of the branch flow circuit discharge line LSK, ab and a - fluidically separate from the section of the branch flow circuit discharge line LSK, ab - preferably curved section of the heat pump discharge line LWP, ab can be arranged in the third node area 24. K3.

[0114] A preferably straight section of the bypass line L By can be arranged in a fourth node region 24. K4 according to Fig.2a and 2b.

[0115] According to Fig.3a and 3b, a preferably curved section of the branch flow circuit discharge line LSK, ab and a - fluidically separate from the section of the branch flow circuit discharge line LSK, ab - preferably curved section of the heat pump discharge line LWP, ab can be arranged in the fourth node area 24. K4.

[0116] The recess structure 24 has at least one parallel region 24.P, in which two fluidically separated lines LWP, ab, LSK, ab can be arranged at least in sections next to one another, one above the other and / or partly outside the parting plane 23.T, in particular partly between the parting plane 23.T and an outer side of the cover 23.2 or an outer side of the base body 23.1 (cf. e.g. Fig. 3a and 3b). In particular, the parallel region 24.P is formed between the third and fourth node regions 24.K3, 24.K4. In particular, Fig. 3b shows how two sections of the heat pump drain line LWP, ab and the branch flow circuit drain line LSK, ab run together / parallel through the parallel region 24.P.

[0117] According to Fig.2a and 2b, a section of the heat exchanger inflow line LWT, ZUbetween the first connection 22.1.A1 and the heating circuit 3-way connector 26.H. Another section of the heat exchanger inlet line LWT, ZU is arranged between the heating circuit 3-way connector 26.H and the sixth connection 22.1.A6. A section of the heat pump drain line LWP, ab is arranged between the second connection

[0118] 22.1.A2 and the third connection 22.1.A3. A section of the heat pump inlet line LWP, ZU is located between the fourth connection 22.1. A4 and the heating circuit 3 / 2-way valve 21. H. Another section of the heat pump supply line LWP, ZU is located between the fifth connection 22.1.A5 and the heating circuit 3 / 2-way valve 21.H. The bypass line L By is arranged completely within the universal housing 23 and is not directly connected to any of the connections 22.1,A1 - 22.1,A6.

[0119] According to Fig.3a and 3b, a section of the heat exchanger inflow line LWT, ZU between the first connection 22.2.A1 and the first 3-way connector 26.1. Another section of the heat exchanger inlet line LWT, ZU is arranged between the first 3-way connector 26.1 and the sixth connection 22.2.A6. A section of the heat pump drain line LWP, with three bends, is arranged between the second connection

[0120] 22.2.A2 and the first 3 / 2-way valve 21.1. A section of the branch flow circuit outlet line LSK, ab is arranged between the third connection 22.2.A3 and the first 3-way connecting piece 26.1. A section of the branch flow circuit inlet line LSK, ZUis located between the fourth connection 22.2.A4 and the first 3 / 2-way valve 21.1. Another section of the heat pump drain line LWP, ab is located between the fifth connection 22.2.A5 and the first 3 / 2-way valve 21.1.

[0121] The central heating system 1 comprises the heating circuit hydraulic module 22.1 and / or the branch flow circuit hydraulic module 22.2 and / or at least one universal housing 23. According to the illustration in Fig. 7a and Fig. 7b, the central heating system 1 comprises the heating circuit hydraulic module 22.1, the branch flow circuit hydraulic module 22.2, and two universal housings 23, of which only the base body 23.1 is shown in each case. As Figs. 1a to 7b all essentially make clear, the heating hydraulic module 22.1 and the branch flow circuit hydraulic module 22.2 each have the same universal housing 23, in particular therefore the heating hydraulic module 22.1 and / or the branch flow circuit hydraulic module 22.2 are “box-like”, in particular each designed and / or constructed as a box.

[0122] The central heating system 1 comprises at least one primary heat source 2 operable with the aid of fuels, in particular a boiler and / or a gas boiler, at least one electrically operable heat pump 3, at least one water-air heat exchanger 4, preferably a heater or a radiator for heating a building, at least one domestic hot water storage tank 5, in particular a boiler, for temporarily storing domestic hot water 11, and a piping system 7. 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. 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 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 LWT, ZU of the piping system 7 is fluidly 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, so that the heat transfer fluid 6 can be supplied to the water-air heat exchanger 4 through the heat exchanger inflow line LWT, ZU. A heat pump inflow line L. W p, to 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 line L W p, to which heat pump 3 can be supplied. A heat pump drain line L W p 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 line LW p, can be supplied from the primary heat source 2.

[0123] As described above, the lines are arranged and / or formed partly in and / or on the heating circuit hydraulic module 22.1, the branch flow circuit hydraulic module 22.2 and in particular within the two associated universal housings 23. However, it is also conceivable that only one of the hydraulic modules 22.1, 22.2 and / or only one universal housing 23 is part of the central heating system 1. By means of both hydraulic modules 22.1, 22.2 and the associated universal housing 23, however, particularly simple manufacture and assembly of the central heating system 1 is possible. In particular, the heat pump 3 can be retrofitted particularly easily to an existing central heating system 1 with only one primary heat source 2 using the two hydraulic modules 22.1, 22.2 and the associated universal housing 23. For this purpose, only the corresponding lines, namely the heat exchanger inflow line LWT, ZU, and the one referred to below as the heat pump inflow line L。W p, zu and as heat pump drain line L W p, the effective line is to be separated and the two hydraulic modules 22.1, 22.2 are to be placed in between and fluidically connected to the resulting line ends.

[0124] A heating circuit 3-way connector 26. H is in the heat exchanger inlet line LWT, ZU arranged, formed and / or interposed here and a heating circuit 3 / 2-way valve 21. H is in the heat pump inlet line L W p, zu arranged, formed and / or interposed therein. Alternatively, it is also conceivable that the heating circuit 3 / 2-way valve is arranged, formed and / or interposed therein in the heat exchanger inflow line and the heating circuit 3-way connector is arranged, formed and / or interposed therein in the heat pump inflow line. The heating circuit 3-way connector 26.H is connected via the bypass line Lß yconnected to the heating circuit 3 / 2-way valve 21. H and / or connected accordingly. A - first - 3-way connector

[0125] 26.1 is in the heat exchanger inlet line LWT, ZU arranged, formed, and / or interposed here. A first 3 / 2-way valve 21.1 is arranged, formed, and / or interposed here in the heat pump discharge line Lw ab.

[0126] By means of a branch of the 3-way connector 26.1 and a branch flow circuit outlet line LsK.ab connected to this branch and a branch of the 3 / 2-way valve 21.1 and a branch flow circuit inlet line LSK connected to this branch, ZUa branch flow circuit KAB of the piping system 7 can be formed. The heat transfer fluid 6 can be conveyed through the branch flow circuit KAB with the aid of at least one pump 8, 9, 9b, and the domestic water 11 can be heated with the aid of the heat transfer fluid 6 flowing through the branch flow circuit KAB. In a first switching position of the first 3 / 2-way valve 21.1, the heat transfer fluid 6 can be conveyed through the branch flow circuit KAB, and in a second switching position of the first 3 / 2-way valve

[0127] 21.1, the flow of the heat transfer fluid 6 through the branch flow circuit KAB is particularly 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 further, curved arrow and a Roman numeral II.

[0128] 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.

[0129] A heating line LHZ is arranged and / or formed within the domestic hot water storage tank 5, within a wall of the domestic hot water storage tank 5 and / or externally on the wall of the domestic hot water storage tank 5, so that when the heat transfer fluid 6 flows through the heating line LHZ, the domestic hot water 11 then present in the domestic hot water storage tank 5 can be heated with the aid of the heat transfer fluid 6. A primary heat source drain line LPQ, from the pipe system 7, is fluidically connected on the one hand to the primary heat source 2 and on the other hand to the heating line LHZ and / or connected accordingly, so that the heat transfer fluid 6 flows through the primary heat source drain line L PQ , a b can be fed to the heating line LHZ. A primary heat source supply line L PQ , zuof the pipe system 7 is fluidically connected and / or connected accordingly to the heating pipe LHZ on the one hand and to the primary heat source 2 on the other hand, so that the heat transfer fluid 6 is supplied through the primary heat source inflow pipe L PQ , zu the primary heat source 2. The heat exchanger inlet line LWT, ZU is connected to the primary heat source drain line L P Q, a b fluidically 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 P Q, ZUfluidically connected, in particular with the aid of a primary heat source 3 / 2-way valve 21.G. In a conventional central heating system 1 without a heat pump 3, in particular to which the heat pump 3 shown here has been 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.

[0130] In particular, a section of the heat exchanger inflow line LW T, ZU fluidically between the primary heat source discharge line Lpo, a b and the first connection 22.2.A1 of the branch flow circuit hydraulic module 22.2. In particular, a section of the heat pump outlet line LWP is fluidically connected between the primary heat source inlet line LPQ, zu and the second connection 22.2.A2 of the branch flow circuit hydraulic module 22.2. Furthermore, a section of the heat exchanger inlet line LWT, ZU Fluidically arranged between the sixth connection 22.2.A2 of the branch flow circuit hydraulic module 22.2 and the first connection 22.1.A1 of the heating circuit hydraulic module 22.1. Furthermore, a section of the heat pump drain line LWP is arranged between the fifth connection 22.2.A5 of the branch flow circuit hydraulic module 22.2 and the second connection 22.1.A2 of the heating circuit hydraulic module 22.1.

[0131] The branch flow circuit inflow line LSK, ZU of the branch flow circuit KAB is connected to the primary heat source discharge line LPQ via the first 3 / 2-way valve 21.1 and a second 3-way connecting piece 26.2 arranged in the primary heat source discharge line LPQ and / or interposed therein, a b fluidically connected and / or to the primary heat source discharge line L PQ , ab The branch flow circuit outlet line LSK, from the branch flow circuit KAB is connected to the first 3-way connector 26.1 and via a third 3-way connector 26.3 to the primary heat source inlet line LPQ, ZU fluidically connected and / or to the primary heat source inflow line L PQ , ZU connected.

[0132] The mentioned connections of the branch flow circuit inflow line LSK, ZUand the branch flow circuit outlet line LSK, ab are particularly easy to implement because the primary heat source 2 according to Fig. 7a has a primary heat source housing 2.G and the domestic hot water storage tank 5 has a domestic hot water storage tank housing 5.G arranged at a distance from the primary heat source housing 2.G. The second and third 3-way connecting pieces 26.2, 26.3 are then arranged between the primary heat source housing 2.G and the domestic hot water storage tank housing 5.G (cf. Fig. 7a). However, according to Fig. 7b, a water-to-water heat exchanger 27, in particular a plate heat exchanger, is provided, in particular designed as a separate component. The branch flow circuit inlet line LSK, ZUThe branch flow circuit KAB is fluidically connected to and / or connected to a first side 27.1 of the water-to-water heat exchanger 27, so that the heat transfer fluid 6 can be supplied to the first side 27.1 via the branch flow circuit inflow line LSK, ZU. The branch flow circuit outflow line LSK, ab of the branch flow circuit KAB is fluidically connected to and / or connected to the first side 27.1 via the branch flow circuit outflow line LSK, ab, so that the heat transfer fluid 6 can be discharged from the first side 27.1 via the branch flow circuit outflow line LSK, ab. A domestic water drain line LBW, ab is fluidically connected and / or connected accordingly on the one hand to the domestic water storage tank 5 and on the other hand to a second side 27.2 of the water-water heat exchanger 27, so that the domestic water 11 flows through the domestic water drain line LBW, ab from the domestic water storage tank 5 of the second side 27.2, in particular with the aid of a domestic water pump 10. A domestic water inflow line LBW, ZU is fluidly connected and / or connected accordingly to the domestic water storage tank 5 on the one hand and to the second side 27.2 on the other hand, so that the domestic water 11 can be supplied to the domestic water storage tank 5 from the second side 27.2 via the domestic water inflow line LBW, ZU.

[0133] A hot water pipe 17a is, as shown in Fig. 7b, fluidically connected to the domestic water outflow pipe LBW, ab and / or connected to the domestic water outflow pipe LBW, ab. A cold water pipe 17b is fluidically connected to the domestic water inflow pipe LBW, ZU and / or connected to the domestic water inflow pipe LBW, ZU. Heated domestic water 11, e.g., for a shower, can be drawn from the domestic water storage tank 5 via the hot water pipe 17a. Fresh, “cold” domestic water 11 can be supplied to the domestic water storage tank 5 via the cold water pipe 17b, in particular 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 pipe 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.

[0134] The domestic water 11 can be heated via the water-to-water heat exchanger 27, particularly with the help of the heat pump 3. The water-to-water heat exchanger 27 is used in particular when a "direct" connection of the heat pump 3 to the heating line LHZ of the domestic water storage tank 5 would not be possible or would only involve excessive effort. This is particularly the case when the primary heat source 2 and the domestic water storage tank 5 have a common integral housing 28, as shown in Fig. 7b. In this case, the heating line LHZ, the primary heat source drain line LPQ, a b and the primary heat source inflow line LPQ, ZU, in particular each completely, are arranged within the integral housing 28 and are therefore not readily accessible.

[0135] The heating pump 8 is assigned to the water-air heat exchanger 4, the circulation pump 9 is assigned to the heat pump 3, and the heat source pump 9b is assigned to the primary heat source 2, namely, they are fluidically arranged in a section of the piping system 7 assigned to the respective unit 2, 3, 4 or in a partial piping section comprising the respective unit 2, 3, 4. During operation, in particular, no splitting or merging of the flow of the heat transfer fluid 6 takes place between the respective pump 8, 9, 9b and the respective unit 2, 3, 4, and no valve is fluidically arranged between the respective pump 8, 9, 9b and the respective unit 2, 3, 4.

[0136] With particular reference to Figs. 7a and 7b, 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 realization of the flow paths and / or flow circuits:

[0137] As shown in Figs. 7a and 7b, the respective embodiments of the central heating systems 1 shown therein described in these figures have at least one first check valve 29, which is arranged in each case in the branch flow circuit inlet line LSK, ZU In addition, in the embodiment shown in Fig. 7a, a second check valve 30 is arranged at the corresponding position shown in Fig. 7a in the primary source discharge line L PQ , a b, in particular fluidically upstream of the second 3-way connecting piece 26.2 and fluidically downstream of the branch of the heat exchanger inflow line L W T, ZU from the primary source discharge line Lp Q , ab. Furthermore, in the embodiment shown in Fig. 7b, in particular a second check valve 31 is arranged in the service water discharge line LBW, ab, in particular in terms of flow upstream of the service water pump 10. The respective first and second check valves 29 and 30 or 29 and 31 reduce a corresponding backflow of the heat transfer fluid 6 or the service 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 should also be pointed out.

[0138] 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 KAB and a first and second heating circuit, are described in more detail:

[0139] A branch flow circuit KAB according to the embodiment shown in Fig. 7a 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 LSK. ZU, via the second 3-way connecting piece 26.2, via the domestic hot water tank 5 or via the heating line LHZ, via the third 3-way connecting piece 26.3, via the branch flow circuit outflow line LsK, at>, via the first 3-way connecting piece 26.1, via the heating circuit 3-way connecting piece 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 can be realized. With the help of the branch flow circuit KAB according to Fig.7a, 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 is also possible.1 in its first switching position I, via the branch flow circuit inflow line LSK. ZU, via the second 3-way connecting piece 26.2, via the domestic hot water tank 5 or via the heating line LHZ, via the third 3-way connecting piece 26.3, via the branch flow circuit outflow line LsK, at>, 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. The switching position of the heating circuit 3 / 2-way valve 21. H can thus be used to control whether the water-air heat exchanger 4 should be flowed through or not.

[0140] A further branch flow circuit KAB according to the embodiment shown in Fig. 7b 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 LSK. ZU, via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit outflow line LsK. ab, via the first 3-way connecting piece 26.1, via the heating circuit 3-way connecting piece 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 can be realized. With the help of the branch flow circuit KAB according to Fig.7b, 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 LSK, ZU, via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit drain line LSK, via the first 3-way connector 26.1, via the heating circuit 3-way connector 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.

[0141] By means of the branch flow circuit KAB shown in Fig. 7a, the domestic water 11 can be heated "directly," in particular with the aid of the heating line LHZ. By means of the branch flow circuit KAB shown in Fig. 7b, the domestic water 11 can be heated "indirectly," in particular with the aid of the water-to-water heat exchanger 27. Preferably, however, either the domestic water 11 or the water-to-air heat exchanger 4 is heated during operation by means of the respective central heating system 1.

[0142] 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. 7a and Fig. 7b 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.

[0143] In a further, second heating circuit, according to Fig. 7a and Fig. 7b, a flow of the heat transfer fluid 6 from the primary heat source 2, via the domestic hot water tank 5 or via the heating line LHZ, 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 can be realized. The heat source pump 9b is necessary to form the second heating circuit. The first heating circuit and the branch flow circuits KAB can also be realized solely by means of the circulation pump 9. The respective branch flow circuit KAB and the second heating circuit can also be realized at least partially simultaneously, in which case the domestic hot water 11 can then be heated both by means of the heat pump 3 and by the primary heat source 2.

[0144] According to Fig. 7a, the respective branch flow circuit KAB and the second heating circuit run partially parallel, with a division of the flow of the heat transfer fluid 6 in the third 3-way connector 26.3 and a merging of the flow of the heat transfer fluid 6 in the second 3-way connector 26.2. According to Fig. 7b, the respective branch flow circuit KAB and the second heating circuit, or the respective flow paths realized thereby, are in particular completely separated from one another.

[0145] According to Fig.7a, theoretically further flow paths are conceivable, whereby 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 particular via the heat source pump 9b, via the primary heat source 2, via the second 3-way connecting piece 26.2, via the domestic hot water tank 5 or via the heating line LHZ, via the third 3-way connecting piece 26.3, via the branch flow circuit drain line LsK, at>, via the first 3-way connecting piece 26.1, via the heating circuit 3-way connecting piece 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 is feasible. It is also conceivable for the heat transfer fluid 6 to flow 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 particular via the heat source pump 9b, via the primary heat source 2, via the second 3-way connecting piece 26.2, via the domestic hot water tank 5 or via the heating line LHZ, via the third 3-way connecting piece 26.3, via the branch flow circuit drain line LSK, 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. The flow paths described above are particularly dependent on the switching position of the heating circuit 3 / 2-way valve 21.H.

[0146] To form specific branch flow circuits KAB or specific flow paths, a targeted control of the primary heat source 3 / 2-way valve 21.G is then necessary, whereas specific branch flow circuits KAB or specific flow paths can advantageously be implemented independently of the switching position of the primary heat source 3 / 2-way valve 21.G. The latter is particularly advantageous if the control of the primary heat source 3 / 2-way valve 21.G was developed for a central heating system 1 without the heat pump 3 and the heat pump 3 was only retrofitted later. As already described above, the heat transfer fluid 6 preheated by the heat pump 3 can then be supplied in full to the primary heat source 2. The heat transfer fluid 6 can then be heated by the heat pump 3 and the primary heat source 2.However, here too, the heat transfer fluid 6 can only flow through the primary heat source 2 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.

[0147] A temperature sensor 13.1 is arranged 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 TBI. The 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 can be controlled and / or regulated depending on the determined actual domestic hot water temperature TBI. In particular, a central heating control and / or regulating device 12 is connected to the primary heat source 2 for control and / or regulation.

[0148] The temperature sensor 13.1 is designed as a first temperature sensor 13.1 for determining a first actual domestic water temperature TBI. A second temperature sensor 13.2 is arranged in a—vertically viewed—middle or upper region of the domestic water storage tank 5 for measuring a second, preferably average actual domestic water temperature TB2. The second temperature sensor 13.2 is connected to the central heating control and / or regulating device 12 for control, signal, and / or data transmission. The central heating control and / or regulating device 12 is designed and / or constructed such that the primary heat source 2 can be controlled and / or regulated depending on the second actual domestic water temperature TB2.

[0149] 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 TBI 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 falls below a first limit temperature.

[0150] 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 B 2 falls below a second limit temperature.

[0151] 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.

[0152] Because the first temperature sensor 13.1 determines the first actual domestic hot water temperature TBI in the - vertically viewed - lower area of ​​the domestic hot water tank 11, the heat pump 3 can be quickly controlled by the heat pump control and / or regulating device 14 without a significant time delay and without extensive and complex control effort. This helps to avoid initially controlling the primary heat source 2, which in turn can save fuel. The output of the heat pump 3 can be continuously adjusted, in particular between 0 kW and 25 kW, in particular between 1.5 kW and 7 kW, by means of the heat pump control and / or regulating device 14, in particular an inverter 19 of the heat pump control and / or regulating device 14.

[0153] The heat pump control and / or regulating device 14 is connected to the central heating control and / or regulating device 12, in particular, only for supplying energy to the heat pump control and / or regulating device 14. A connection to a power grid is also conceivable.

[0154] The heat pump control and / or regulating device 14 is connected to the heat pump 8 for controlling and / or regulating the heating pump 8 and / or the heat pump control and / or regulating device 14 is connected to the circulation pump 9 for controlling and / or regulating the circulation pump 9 and / or the heat pump control and / or regulating device 14 is connected to the domestic water pump 10 for controlling and / or regulating the domestic water pump 10 and / or the heat pump control and / or regulating device 14 is connected to the first 3 / 2-way valve 21.1 for controlling and / or regulating the first 3 / 2-way valve 21.1 and / or the heat pump control and / or regulating device 14 is connected to the heating circuit 3 / 2-way valve 21. H for controlling and / or regulating the Heating circuit 3 / 2-way valve 21.H and / or the heat pump control and / or regulating device 14 is connected to an outside temperature sensor 13.a for determining an outside temperature in terms of control, signaling, and / or data. Furthermore, the heat pump control and / or regulating device 14 is effectively connected to the first temperature sensor 13.1 in terms of control, signaling, and / or data.

[0155] The central heating control and / or regulating device 12 is connected to the heat source pump 9b for control and / or regulation of the heat source pump 9b, and / or the central heating control and / or regulating device 12 is connected to the primary heat source 3 / 2-way valve 21.G for control and / or regulation of the primary heat source 3 / 2-way valve 21.G, and / or the central heating control and / or regulating device 12 is connected to another outside temperature sensor 13.b for control / signal / and / or data purposes for determining the outside temperature. The above statements regarding the control connections of the heat pump control and / or regulating device 14 and the central heating control and / or regulating device 12 apply to both the first and the second exemplary embodiment of the central heating system 1 according to Fig. 7a and Fig. 7b.These connections are partly symbolized by dashed lines, whereby these dashed lines are shown interrupted.

[0156] From the group of the following elements and / or components, namely the branch flow circuit inflow line LSK, ZU at least in sections, the branch flow circuit outflow line LSK, ab at least in sections, the water-water heat exchanger 27, the domestic water inflow line LBW, ZU at least in sections, the domestic water outflow line LBW, ab at least in sections, and the domestic water pump 10, at least two, in particular all, elements and / or components and their respective associated connections are arranged and / or formed on a water-water heat exchanger hydraulic module 22.3 forming a common structural unit. Here, too, the respective aforementioned lines can now be formed or will be formed in sections in this water-water heat exchanger hydraulic module 22.3. It is conceivable that the water-water heat exchanger hydraulic module 22.3 also has a housing, namely a water-water heat exchanger hydraulic module housing.

[0157] Regarding the operation of the respective central heating system according to Figs. 7a and 7b and / or the preferred method for operating the respective central heating system 1, the following may be pointed out or briefly stated:

[0158] 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 fact that the first actual domestic hot water temperature TBI - viewed vertically - is measured below the second actual domestic hot water temperature TB2. In particular, when the power 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 does 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. With the central heating systems 1 shown here in Figs. 7a and 7b it is therefore particularly possible to ensure that the primary source 2 is activated neither too early nor too late in order to save fuel and to comfortably control the temperature of the domestic water 11 taken from the domestic water storage tank 5. In this case, in particular with the help of the hydraulic modules 22.1 and 22.2 described above, in particular with the appropriately designed heating circuit hydraulic module 22.1 and the branch flow circuit hydraulic module 22.2, already existing central heating systems 1 can then be retrofitted and / or converted or retrofitted in a simple manner and without great effort, so that in the end the hydraulic modules 22.1 and 22.2 shown in Figs.7a and 7b can be implemented using central heating systems 1 that are equipped and / or operable in this way.

[0159] List of reference symbols

[0160] central heating system

[0161] Primary heat source .G Primary heat source housing

[0162] heat pump

[0163] Water-air heat exchanger

[0164] Domestic hot water storage tank .G Domestic hot water storage tank housing

[0165] Heat transfer fluid

[0166] piping system

[0167] heating pump

[0168] Circulation pump b Heat source pump 0 Domestic hot water pump 1 Domestic hot water 2 Central heating control and / or regulating device 3.1 First temperature sensor 3.2 Second temperature sensor 3. a Outside temperature sensor 3. b Outside temperature sensor 4 Heat pump control and / or regulating device 7a Hot water pipe 7b Cold water pipe 9 Inverter 1.1 First 3 / 2-way valve 1. H Heating circuit 3 / 2-way valve 1. G Primary heat source 3 / 2-way valve 2.1 Heating circuit hydraulic module 2.1. G Heating circuit hydraulic module housing 2.1. S1 First side of the heating circuit hydraulic module 22.1 2.1. S2 Second side of the heating circuit hydraulic module 22.12.1. S3 Third side of the heating circuit hydraulic module 22.1 2.1. A1 - 22.1 ,A6 Connections of the heating circuit hydraulic module 22.12.2 Branch flow circuit hydraulic module 2.2.G Branch flow circuit hydraulic module housing 22.2.51 first side of the branch flow circuit hydraulic module 22.2

[0169] 22.2.52 second side of the branch flow circuit hydraulic module 22.2

[0170] 22.2.53 third side of the branch flow circuit hydraulic module 22.2

[0171] 22.2.A1 - 22.2.A6 Connections of the branch flow circuit hydraulic module 22.2

[0172] 22.3 Water-to-water heat exchanger hydraulic module

[0173] 23 Universal Housing

[0174] 23.1 Basic body

[0175] 23.2 Lid

[0176] 23. T parting line

[0177] 24 Recess structure

[0178] 24. A1 - 24.A6 Connection openings of the recess structure

[0179] 24. V valve opening

[0180] 24. K1 - 24.K4 Nodal areas of the recess structure

[0181] 24. P Parallel area of ​​the recess structure

[0182] 26.1 first 3-way connector

[0183] 26.2 second 3-way connector

[0184] 26.3 third 3-way connector

[0185] 26. H Heating circuit 3-way connector

[0186] 27 water-water heat exchangers

[0187] 27.1 First side of the water-water heat exchanger 27

[0188] 27.2 second side of the water-water heat exchanger 27

[0189] 28 integral housings

[0190] 29 Check valve

[0191] 30 Check valve

[0192] 31 Check valve

[0193] KAB branch flow circuit

[0194] TBI first actual domestic water temperature

[0195] TB2 second actual domestic water temperature

[0196] LWT, ZU heat exchanger inflow line

[0197] LWP, to heat pump inlet line

[0198] LWP, from heat pump drain line

[0199] L By Bypass line

[0200] LHZ heating cable

[0201] LPQ, from primary heat source drain line

[0202] LPQ, ZU primary heat source inflow line

[0203] LSK, ZU Branch flow circuit inflow line LSK, ab Branch flow circuit outflow line

[0204] LBW, from domestic water discharge line

[0205] LBW, ZU domestic water inflow line

Claims

Patent claims 1. Heating circuit hydraulic module (22.1) 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 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, in particular 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) can be conveyed for heating by the heat pump (3) and / or, in particular for heating by the primary heat source (2), wherein a heat exchanger inflow line (LWT, ZU ) of the pipe system (7) is fluidically connectable, connected and / or correspondingly connected on the one hand to the primary heat source (2) and on the other hand to the water-air heat exchanger (4), so that the heat transfer fluid (6) can be fed to the water-air heat exchanger (4) through the heat exchanger inflow line (LWT, ZU), wherein a heat pump inflow line (L W p, 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, to) of the heat pump (3), wherein a heat pump discharge line (Lwp,at>) of the line system (7) is fluidically connectable, connected and / or correspondingly connected 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 fed through the heat pump discharge line (L W p, ab) can be fed to the primary heat source (2), characterized in that the heating circuit hydraulic module (22.1) has a heating circuit hydraulic module housing (22.1.G), wherein in and / or on the heating circuit hydraulic module housing (22.1.G) a heating circuit 3-way connecting piece (26.H), a heating circuit 3 / 2-way valve (21.H), in sections the heat exchanger inflow line (LWT, ZU), in sections the heat pump inflow line (L W p, to), sectionally the heat pump drain line (L W p, ab) and a bypass line (L By) are formed and / or arranged, wherein the heating circuit 3-way connecting piece (26.H) is arranged, formed and / or interposed in the heat exchanger inflow line (LWT, ZU) and the heating circuit 3 / 2-way valve (21. H) is in the heat pump inlet line (L W p, zu) is arranged, formed and / or interposed here, or wherein the heating circuit 3 / 2-way valve (21. H) is arranged, formed and / or interposed here in the heat exchanger inflow line (LWT, ZU) and the heating circuit 3-way connecting piece (26. H) is arranged, formed and / or interposed here in the heat pump inflow line (L W p, to) is arranged, formed and / or interposed here, and 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.

2. Heating circuit hydraulic module (22.1) according to claim 1, characterized in that two connections (22.1.A1, 22.1.A2) of the heating circuit hydraulic module (22.1), in particular to be fluidically connected to the primary heat source (2), are arranged and / or formed on a first side (22.1.S1) of the heating circuit hydraulic module (22.1), wherein two connections (22.1.A3, 22.1.A4) of the heating circuit hydraulic module (22.1) to be fluidically connected to the heat pump (3) are arranged and / or formed on a second side (22.1.S2) of the heating circuit hydraulic module (22.1), and wherein two connections (22.1.A5, 22.1.A6) to be fluidically connected to the water-air heat exchanger (4) of the heating circuit hydraulic module (22.1) are arranged and / or formed on a third side (22.

1. S3) of the heating circuit hydraulic module (22.1).

3. Branch flow circuit hydraulic module (22.2) 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) for its heating by the heat pump (3) and / or,in particular for heating it, can be conveyed by the primary heat source (2), wherein a heat exchanger inflow line (LWT, ZU) of the line 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) can be fed to the water-air heat exchanger (4) through the heat exchanger inflow line (LWT, ZU), wherein a, Heat pump inlet line (L W p, 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, to) of the heat pump (3), wherein a heat pump discharge line (Lwp,at>) of the line system (7) is fluidically connectable, connected and / or correspondingly connected 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 fed through the heat pump discharge line (L W p, ab) can be fed to the primary heat source (2), characterized in that the branch flow circuit hydraulic module (22.2) has a branch flow circuit hydraulic module housing (22.

2. G), wherein in and / or on the branch flow circuit hydraulic module housing (22.

2. G) a - first - 3-way connecting piece (26.1 ), a - first - 3 / 2-way valve (21.1 ), in sections the heat exchanger inflow line (LWT. ZU), in sections the heat pump outflow line (L Wp, ab), in sections a branch flow circuit inflow line (LSK, ZU) and in sections a branch flow circuit outflow line (LSK, ab) are formed and / or arranged, wherein the 3-way connecting piece (26.1) is arranged, formed and / or interposed in the heat exchanger inflow line (LWT, ZU), and wherein the 3 / 2-way valve (21.1) is arranged in the heat pump outflow line (L W p, ab) is arranged, formed and / or interposed here.

4. Branch flow circuit hydraulic module (22.2) according to claim 3, characterized in that with the aid of a branch of the 3-way connecting piece (26.1) and a branch flow circuit outflow line (LSK, ab) connected to this branch and a branch of the 3 / 2-way valve (21.1) and a branch flow circuit inflow line (LSK, ZU) connected to this branch, a branch flow circuit (KAB) of the line system (7) can be formed, wherein the heat transfer fluid (6) can be conveyed through the branch flow circuit (KAB) with the aid of the at least one pump (8, 9, 9b) and the domestic water (11) can be heated with the aid of the heat transfer fluid (6) flowing through the branch flow circuit (KAB).

5. Branch flow circuit hydraulic module (22.2) according to claim 3 or 4, characterized in that two connections (22.2.A1, 22.2.A2) of the branch flow circuit hydraulic module (22.2) to be fluidically connected to the primary heat source (2) are arranged and / or formed on a first side (22.2.S1) of the branch flow circuit hydraulic module (22.2), wherein in each case one connection (22.2.A4, 22.2.A3) of the branch flow circuit inflow line (LSK, in) and the branch flow circuit outflow line (LSK, out) of the branch flow circuit hydraulic module (22.2) is arranged and / or formed on a second side (22.2.S2) of the branch flow circuit hydraulic module (22.2), and wherein two connections (22.2.A5, 22.2.A6) of the branch flow circuit hydraulic module (22.2), which are to be fluidically connected to the heat pump (3) and / or the water-air heat exchanger (4), in particular with the aid of the heating circuit hydraulic module (22.1), are arranged and / or formed on a third side (22.2.S3) of the branch flow circuit hydraulic module (22.2).

6. Universal housing (23) for hydraulic modules (22.1, 22.2) that can be used in central heating systems (1), in particular for hydraulic modules (22.1, 22.2) according to one of claims 1 to 5, in particular for the heating circuit hydraulic module (22.1) according to claims 1 to 2 and for the branch flow circuit hydraulic module (22.2) according to claims 3 to 5, characterized in that at least two different configurations of lines (LWT. ZU, LWP, zu, LWP, ab, L By , LSK, ZU, LSK, ab), connecting pieces, in particular 3-way connecting pieces (26. H, 26.1), and / or valves, in particular 3 / 2-way valves (21. H, 21.1), can be formed with the aid of the universal housing (23) and the lines (LWT. ZU, LWP, ZU, LWP, ab, L By , LSK, ZU, LSK, ab), connecting pieces (26.H, 26.1) and / or valves (21. H, 21.1) can be arranged accordingly in and / or on the universal housing (23), in particular wherein the heating circuit hydraulic module housing (22.1.G) and the branch flow circuit hydraulic module housing (22.2.G) are of identical construction.

7. Universal housing (23) according to claim 6, characterized in that the universal housing (23) has at least one recess structure (24) with a plurality of recess areas (24. K1 - 24. K4, 24. P) for receiving lines (LWT. ZU, LWP, ZU, Lw ab, Lßy, LSK, zu, LSK, ab), connecting pieces (26.H, 26.1) and / or valves (21. H, 21.1).

8. Universal housing (23) according to claim 7, characterized in that the recess structure (24) is at least partially designed as a negative form of the lines (LWT. ZU, LWP, ZU, LWP, ab, L By, LSK, ZU, LSK, ab), the connecting pieces (26. H, 26.1) and / or the valves (21. H, 21.1).

9. Universal housing (23) according to claim 7 or 8, characterized in that the universal housing (23) has a base body (23.1) and a cover (23.2), and the recess structure (24) in the assembled state of the universal housing (23) is completely formed partly with the aid of the base body (23.1) and / or partly with the aid of the cover (23.2).

10. Universal housing (23) according to one of claims 7 to 9, characterized in that the recess structure (24) has a total of several, in particular six, connection openings (24. A1 - 24. A6) to the environment of the universal housing (23), wherein connections (22.1.A1 - 22.1.A6 or 22.2.A1 - 22.2.A6) of a hydraulic module (22.1, 22.2) having the universal housing (23) can be arranged and / or formed in and / or adjacent to the connection openings (24. A1 - 24. A6).

11. Universal housing (23) according to claim 10, characterized in that two connection openings (24. A1 - 24. A6) are located in a connection opening plane, wherein the connection opening plane is aligned perpendicular to a parting plane (23.T) formed by the contact between the base body (23.1) and the cover (23.2) in the assembled state of the universal housing (23).

12. Universal housing (23) according to one of claims 7 to 11, characterized in that the recess structure (24) has a valve opening (24.V) to the environment of the universal housing (23), wherein a valve (21.H, 21.1) of the hydraulic module (22.1, 22.2) having the universal housing (23) can be arranged at least partially within the valve opening (24.V) and / or penetrating this valve opening (24.V), in particular wherein the axis of the valve opening (24.V) is aligned substantially perpendicular to the parting plane (23.T).

13. Universal housing (23) according to claim 12, characterized in that the valve opening (24.V) is formed in the cover (23.1).

14. Universal housing (23) according to one of claims 7 to 13, characterized in that the recess structure (24) has at least one node region (24. K1 - 24. K4) in which a connecting piece (26. H, 26.1), a valve (21. H, 21.1) and / or two fluidically separated lines (L By , L W p,at>, LSK, ZU ) can be arranged.

15. Universal housing (23) according to claim 14, characterized in that a 3-way connecting piece, in particular the heating circuit 3-way connecting piece (26.H) or the first 3-way connecting piece (26.1), can be arranged in a first node area (24.K1).

16. Universal housing (23) according to claim 14 or 15, characterized in that a 3 / 2-way valve, in particular the heating circuit 3 / 2-way valve (21.H) or the first 3 / 2-way valve (21.1), can be arranged in a second node area (24.K2).

17. Universal housing (23) according to one of claims 14 to 16, characterized in that a preferably curved section of the bypass line (L By ) and a - flow-wise to the section of the bypass line (L By ) separate - preferably curved section of the heat pump discharge line (LWP, ab) can be arranged in a third node area (24. K3).

18. Universal housing (23) according to one of claims 14 to 16, characterized in that a preferably curved section of the branch flow circuit discharge line (LSK, ab) and a preferably curved section of the heat pump discharge line (L W p, ab) can be arranged in the third node area (24.K3).

19. Universal housing (23) according to one of claims 14 to 18, characterized in that a preferably straight section of the bypass line (L By ) can be arranged in a fourth node area (24. K4).

20. Universal housing (23) according to one of claims 14 to 18, characterized in that a preferably curved section of the branch flow circuit discharge line (LSK, ab) and a preferably curved section of the heat pump discharge line (LWP, ab) - which is fluidically separated from the section of the branch flow circuit discharge line (LSK, ab) - can be arranged in the fourth node region (24. K4). 21 . Universal housing (23) according to one of claims 7 to 20, characterized in that the recess structure (24) has at least one parallel region (24.P) in which two fluidically separated lines (LWP, ab, LSK, ab) can be arranged at least in sections next to one another, one above the other and / or partly outside the parting plane (23.T), in particular partly running between the parting plane (23.T) and an outer side of the cover (23.2) or an outer side of the base body (23.1), in particular wherein the parallel region (24.P) is formed between the third and the fourth node region (24.K3, 24.K4).

22. Central heating system (1) with a heating circuit hydraulic module (22.1) according to one of claims 1 to 2 and / or with a branch flow circuit hydraulic module (22.2) according to one of claims 3 to 5 and / or with at least one universal housing (23) according to one of claims 6 to 21, with at least one primary heat source (2) operable with the aid of fuels, in particular a 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 pipe 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 pipe 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) can be conveyed for heating by the heat pump (3) and / or, in particular for heating by the primary heat source (2), wherein a heat exchanger inflow pipe (LWT, 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) can be fed to the water-air heat exchanger (4) through the heat exchanger inflow line (LWT, ZU), wherein a heat pump inflow line (L W p, 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 W p, to) 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 W p, ab) of the primary heat source (2), characterized in that a heating circuit 3-way connecting piece (26.H) is arranged, formed and / or interposed in the heat exchanger inflow line (LWT, zu) and a heating circuit 3 / 2-way valve (21. H) is arranged in the heat pump inflow line (L W p, zu) is arranged, formed and / or interposed here, or wherein the heating circuit 3 / 2-way valve (21. H) is arranged, formed and / or interposed here in the heat exchanger inflow line (LWT, ZU) and the heating circuit 3-way connecting piece (26. H) is arranged, formed and / or interposed here in the Heat pump inlet line (L Wp, to) is arranged, formed and / or interposed here, wherein the heating circuit 3-way connecting piece (26. H) is connected via the Bypass line (Lßy) is fluidically connected to the heating circuit 3 / 2-way valve (21. H) and / or connected accordingly, wherein a - first - 3-way connecting piece (26.1) is arranged, formed and / or interposed in the heat exchanger inflow line (LWT, ZU), and wherein a - first - 3 / 2-way valve (21.1) is arranged, formed and / or interposed in the heat pump outflow line (Lwp,at>).

23. Central heating system (1) according to claim 22, characterized in that with the aid of a branch of the 3-way connecting piece (26.1) and a branch flow circuit outflow line (LSK, ab) connected to this branch and a branch of the 3 / 2-way valve (21.1) and a branch flow circuit inflow line (LSK, zu) connected to this branch, a branch flow circuit (KAB) of the line system (7) can be formed, wherein the heat transfer fluid (6) can be conveyed through the branch flow circuit (KAB) with the aid of the at least one pump (8, 9, 9b) and the domestic water (11) can be heated with the aid of the heat transfer fluid (6) flowing through the branch flow circuit (KAB).

24. Central heating system (1) according to claim 22 or 23, characterized in that a heating line (LHZ) is arranged and / or formed within the domestic water storage tank (5), within a wall of the domestic water storage tank (5) and / or externally on the wall of the domestic water storage tank (5), so that when the heat transfer fluid (6) flows through the heating line (LHZ), the domestic water (11) then present in the domestic water storage tank (5) can be heated with the aid of the heat transfer fluid (6), wherein a primary heat source discharge line (L PQ , ab) 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 heating pipe (LHZ) on the other hand, so that the heat transfer fluid (6) is discharged through the primary heat source discharge pipe (L PQ , ab) of the heating line (LHZ), wherein a primary heat source inflow line (L PQ , zu) of the pipe system (7) is fluidically connected and / or connected accordingly to the heating pipe (LHZ) on the one hand and to the primary heat source (2) on the other hand, so that the heat transfer fluid (6) is supplied through the primary heat source inflow pipe (L PQ , zu ) of the primary heat source (2), wherein the heat exchanger inflow line (LWT, ZU) is connected to the primary heat source outflow line (L PQ , ab) fluidically connected and / or to the primary heat source discharge line (L PQ , ab) is fluidically connected, and the heat pump drain line (L WP , ab) with the primary heat source inflow line (LPQ, ZU ) fluidically connected and / or connected to the primary heat source inflow line (L PQ , zu ) is fluidically connected, in particular by means of a primary heat source 3 / 2-way valve (21 .G).

25. Central heating system (1 ) according to claim 24, characterized in that the branch flow circuit inflow line (LSK, ZU) of the branch flow circuit (KAB) is connected to the primary heat source outlet line (L) via the first 3 / 2-way valve (21.1 ) and via a primary heat source outlet line (L PQ , ab ) and / or interposed second 3-way connector (26.2) with the primary heat source discharge line (L PQ , ab ) fluidically connected and / or connected to the primary heat source discharge line (L PQ , ab ), whereby the branch flow circuit discharge line (LSK, ab) of the branch flow circuit (KAB) is connected to the first 3-way connector (26.1 ) and via a third 3-way connector (26.3) to the primary heat source inflow line (L PQ , zu ) fluidically connected and / or connected to the primary heat source inflow line (L PQ , ZU ) is connected.

26. Central heating system (1) according to claim 25, characterized in that the primary heat source (2) has a primary heat source housing (2.G) and the domestic water storage tank (5) has a domestic water storage tank housing (5.G) arranged at a distance from the primary heat source housing (2.G), wherein the second and third 3-way connecting pieces (26.2, 26.3) are arranged between the primary heat source housing (2.G) and the domestic water storage tank housing (5.G).

27. Central heating system (1) according to one of claims 22 to 24, characterized in that a water-water heat exchanger (27), in particular a plate heat exchanger, is provided, in particular designed as a separate component, wherein the branch flow circuit inflow line (LSK, ZU) of the branch flow circuit (KAB) is fluidically connected to a first side (27.1) of the water-water heat exchanger (27) and / or is connected thereto, so that the heat transfer fluid (6) is conveyed through the branch flow circuit inflow line (LSK, ZU ) of the first side (27.1 ), wherein the branch flow circuit discharge line (LSK, ab) of the branch flow circuit (KAB) is fluidically connected to the first side (27.1 ) and / or is connected thereto, so that the heat transfer fluid (6) can be discharged from the first side (27.1 ) through the branch flow circuit discharge line (LSK, ab), wherein a service water discharge line (L Bw, ab) is fluidically connected and / or connected accordingly on the one hand to the domestic water storage tank (5) and on the other hand 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) from the domestic water storage tank (5) of the second side (27.2), in particular with the aid of a domestic water pump (10), and wherein a domestic water inlet line (L BW , to) is fluidically connected and / or connected accordingly to the domestic hot water storage tank (5) on the one hand and to the second side (27.2) on the other hand, so that the Domestic water (11) can be fed to the domestic water storage tank (5) from the second side (27.2) via the domestic water inflow line (LBW. ZU).

28. Central heating system (1) according to claim 27, characterized in that a hot water pipe (17a) is fluidically connected to the domestic water outflow pipe (LBW, ab) and / or is connected to the domestic water outflow pipe (LBW, ab), wherein a cold water pipe (17b) is fluidically connected to the domestic water inflow pipe (LBW, ZU) and / or is connected to the domestic water inflow pipe (LBW, ZU).

29. Central heating system (1) according to claim 27 or 28, characterized in that the primary heat source (2) and the domestic water storage tank (5) have a common integral housing (28), wherein the primary heat source discharge line (L PQ , a b) and the primary heat source inflow line (LPQ, ZU ), at least partially, in particular completely, are arranged within the integral housing (28).

30. Central heating system (1) according to one of claims 22 to 29, characterized in that the heating pump (8) is assigned to the water-air heat exchanger (4), the circulation pump (9) to the heat pump (3) and the heat source pump (9b) to the primary heat source (2), namely is arranged in a fluidically manner in a region of the line system (7) assigned to the respective unit (2, 3, 4) or in a partial line region having the respective unit (2, 3, 4).

31. Central heating system (1) according to one of claims 22 to 30, characterized in that a temperature sensor (13.1) is arranged in a - viewed vertically - lower region of the domestic hot water storage tank (5) or adjacent to this - viewed vertically - lower region of the domestic hot water storage tank (5) for determining the actual domestic hot water temperature (TBI ), wherein the temperature sensor (13.1) is connected to a heat pump control and / or regulating device (14) for control / signal / and / or data technology, wherein the heat pump (3) is connected to the heat pump control and / or regulating device (14) for control technology, and wherein the heat pump control and / or regulating device (14) is designed and / or constructed such that the heat pump (3) can be controlled and / or regulated as a function of the determined actual domestic hot water temperature (TBI ).

32. Central heating system (1) according to one of claims 22 to 31, characterized in that the first actual domestic water temperature (TBI) can be transmitted to the heat pump control and / or regulating device (14) and / or by means of the heat pump control and / or regulating device (14) can be determined and / or calculated, wherein a second, preferably average, actual domestic water temperature (TB2) can be measured, determined and / or calculated by means of a second temperature sensor (13.2) in a - vertically viewed - middle or upper region of the domestic water storage tank (5), wherein the second actual domestic water temperature (T B2) can be transmitted to the central heating control and / or regulating device (12) and / or can be determined and / or calculated by means of the central heating control and / or regulating device (12), and wherein the primary heat source (2) can be controlled and / or regulated by means of the central heating control and / or regulating device (12) as a function of the second actual domestic water temperature (TB2).

Images